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| meta
dict | __index_level_0__
int64 0
60.4k
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | RefundVault | contract RefundVault is Ownable {
using SafeMath for uint256;
enum State { Active, Refunding, Closed }
mapping (address => uint256) public deposited;
address public wallet;
State public state;
event Closed();
event RefundsEnabled();
event Refunded(address indexed beneficiary, uint256 weiAmount);
/**
* @param _wallet Vault address
*/
function RefundVault(address _wallet) public {
require(_wallet != address(0));
wallet = _wallet;
state = State.Active;
}
/**
* @param investor Investor address
*/
function deposit(address investor) onlyOwner public payable {
require(state == State.Active);
deposited[investor] = deposited[investor].add(msg.value);
}
function close() onlyOwner public {
require(state == State.Active);
state = State.Closed;
emit Closed();
wallet.transfer(address(this).balance);
}
function enableRefunds() onlyOwner public {
require(state == State.Active);
state = State.Refunding;
emit RefundsEnabled();
}
/**
* @param investor Investor address
*/
function refund(address investor) public {
require(state == State.Refunding);
uint256 depositedValue = deposited[investor];
deposited[investor] = 0;
investor.transfer(depositedValue);
emit Refunded(investor, depositedValue);
}
} | deposit | function deposit(address investor) onlyOwner public payable {
require(state == State.Active);
deposited[investor] = deposited[investor].add(msg.value);
}
| /**
* @param investor Investor address
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
576,
745
]
} | 4,407 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | RefundVault | contract RefundVault is Ownable {
using SafeMath for uint256;
enum State { Active, Refunding, Closed }
mapping (address => uint256) public deposited;
address public wallet;
State public state;
event Closed();
event RefundsEnabled();
event Refunded(address indexed beneficiary, uint256 weiAmount);
/**
* @param _wallet Vault address
*/
function RefundVault(address _wallet) public {
require(_wallet != address(0));
wallet = _wallet;
state = State.Active;
}
/**
* @param investor Investor address
*/
function deposit(address investor) onlyOwner public payable {
require(state == State.Active);
deposited[investor] = deposited[investor].add(msg.value);
}
function close() onlyOwner public {
require(state == State.Active);
state = State.Closed;
emit Closed();
wallet.transfer(address(this).balance);
}
function enableRefunds() onlyOwner public {
require(state == State.Active);
state = State.Refunding;
emit RefundsEnabled();
}
/**
* @param investor Investor address
*/
function refund(address investor) public {
require(state == State.Refunding);
uint256 depositedValue = deposited[investor];
deposited[investor] = 0;
investor.transfer(depositedValue);
emit Refunded(investor, depositedValue);
}
} | refund | function refund(address investor) public {
require(state == State.Refunding);
uint256 depositedValue = deposited[investor];
deposited[investor] = 0;
investor.transfer(depositedValue);
emit Refunded(investor, depositedValue);
}
| /**
* @param investor Investor address
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
1125,
1382
]
} | 4,408 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | FinalizableCrowdsale | contract FinalizableCrowdsale is TimedCrowdsale, Ownable {
using SafeMath for uint256;
bool public isFinalized = false;
event Finalized();
/**
* @dev Must be called after crowdsale ends, to do some extra finalization
* work. Calls the contract's finalization function.
*/
function finalize() onlyOwner public {
require(!isFinalized);
require(hasClosed());
finalization();
emit Finalized();
isFinalized = true;
}
/**
* @dev Can be overridden to add finalization logic. The overriding function
* should call super.finalization() to ensure the chain of finalization is
* executed entirely.
*/
function finalization() internal {
}
} | finalize | function finalize() onlyOwner public {
require(!isFinalized);
require(hasClosed());
finalization();
emit Finalized();
isFinalized = true;
}
| /**
* @dev Must be called after crowdsale ends, to do some extra finalization
* work. Calls the contract's finalization function.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
303,
477
]
} | 4,409 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | FinalizableCrowdsale | contract FinalizableCrowdsale is TimedCrowdsale, Ownable {
using SafeMath for uint256;
bool public isFinalized = false;
event Finalized();
/**
* @dev Must be called after crowdsale ends, to do some extra finalization
* work. Calls the contract's finalization function.
*/
function finalize() onlyOwner public {
require(!isFinalized);
require(hasClosed());
finalization();
emit Finalized();
isFinalized = true;
}
/**
* @dev Can be overridden to add finalization logic. The overriding function
* should call super.finalization() to ensure the chain of finalization is
* executed entirely.
*/
function finalization() internal {
}
} | finalization | function finalization() internal {
}
| /**
* @dev Can be overridden to add finalization logic. The overriding function
* should call super.finalization() to ensure the chain of finalization is
* executed entirely.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
677,
719
]
} | 4,410 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | RefundableCrowdsale | contract RefundableCrowdsale is FinalizableCrowdsale {
using SafeMath for uint256;
// minimum amount of funds to be raised in weis
uint256 public goal;
// refund vault used to hold funds while crowdsale is running
RefundVault public vault;
/**
* @dev Constructor, creates RefundVault.
* @param _goal Funding goal
*/
function RefundableCrowdsale(uint256 _goal) public {
require(_goal > 0);
vault = new RefundVault(wallet);
goal = _goal;
}
/**
* @dev Investors can claim refunds here if crowdsale is unsuccessful
*/
function claimRefund() public {
require(isFinalized);
require(!goalReached());
vault.refund(msg.sender);
}
/**
* @dev Checks whether funding goal was reached.
* @return Whether funding goal was reached
*/
function goalReached() public view returns (bool) {
return weiRaised >= goal;
}
/**
* @dev vault finalization task, called when owner calls finalize()
*/
function finalization() internal {
if (goalReached()) {
vault.close();
} else {
vault.enableRefunds();
}
super.finalization();
}
/**
* @dev Overrides Crowdsale fund forwarding, sending funds to vault.
*/
function _forwardFunds() internal {
vault.deposit.value(msg.value)(msg.sender);
}
} | RefundableCrowdsale | function RefundableCrowdsale(uint256 _goal) public {
require(_goal > 0);
vault = new RefundVault(wallet);
goal = _goal;
}
| /**
* @dev Constructor, creates RefundVault.
* @param _goal Funding goal
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
353,
495
]
} | 4,411 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | RefundableCrowdsale | contract RefundableCrowdsale is FinalizableCrowdsale {
using SafeMath for uint256;
// minimum amount of funds to be raised in weis
uint256 public goal;
// refund vault used to hold funds while crowdsale is running
RefundVault public vault;
/**
* @dev Constructor, creates RefundVault.
* @param _goal Funding goal
*/
function RefundableCrowdsale(uint256 _goal) public {
require(_goal > 0);
vault = new RefundVault(wallet);
goal = _goal;
}
/**
* @dev Investors can claim refunds here if crowdsale is unsuccessful
*/
function claimRefund() public {
require(isFinalized);
require(!goalReached());
vault.refund(msg.sender);
}
/**
* @dev Checks whether funding goal was reached.
* @return Whether funding goal was reached
*/
function goalReached() public view returns (bool) {
return weiRaised >= goal;
}
/**
* @dev vault finalization task, called when owner calls finalize()
*/
function finalization() internal {
if (goalReached()) {
vault.close();
} else {
vault.enableRefunds();
}
super.finalization();
}
/**
* @dev Overrides Crowdsale fund forwarding, sending funds to vault.
*/
function _forwardFunds() internal {
vault.deposit.value(msg.value)(msg.sender);
}
} | claimRefund | function claimRefund() public {
require(isFinalized);
require(!goalReached());
vault.refund(msg.sender);
}
| /**
* @dev Investors can claim refunds here if crowdsale is unsuccessful
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
585,
714
]
} | 4,412 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | RefundableCrowdsale | contract RefundableCrowdsale is FinalizableCrowdsale {
using SafeMath for uint256;
// minimum amount of funds to be raised in weis
uint256 public goal;
// refund vault used to hold funds while crowdsale is running
RefundVault public vault;
/**
* @dev Constructor, creates RefundVault.
* @param _goal Funding goal
*/
function RefundableCrowdsale(uint256 _goal) public {
require(_goal > 0);
vault = new RefundVault(wallet);
goal = _goal;
}
/**
* @dev Investors can claim refunds here if crowdsale is unsuccessful
*/
function claimRefund() public {
require(isFinalized);
require(!goalReached());
vault.refund(msg.sender);
}
/**
* @dev Checks whether funding goal was reached.
* @return Whether funding goal was reached
*/
function goalReached() public view returns (bool) {
return weiRaised >= goal;
}
/**
* @dev vault finalization task, called when owner calls finalize()
*/
function finalization() internal {
if (goalReached()) {
vault.close();
} else {
vault.enableRefunds();
}
super.finalization();
}
/**
* @dev Overrides Crowdsale fund forwarding, sending funds to vault.
*/
function _forwardFunds() internal {
vault.deposit.value(msg.value)(msg.sender);
}
} | goalReached | function goalReached() public view returns (bool) {
return weiRaised >= goal;
}
| /**
* @dev Checks whether funding goal was reached.
* @return Whether funding goal was reached
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
830,
920
]
} | 4,413 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | RefundableCrowdsale | contract RefundableCrowdsale is FinalizableCrowdsale {
using SafeMath for uint256;
// minimum amount of funds to be raised in weis
uint256 public goal;
// refund vault used to hold funds while crowdsale is running
RefundVault public vault;
/**
* @dev Constructor, creates RefundVault.
* @param _goal Funding goal
*/
function RefundableCrowdsale(uint256 _goal) public {
require(_goal > 0);
vault = new RefundVault(wallet);
goal = _goal;
}
/**
* @dev Investors can claim refunds here if crowdsale is unsuccessful
*/
function claimRefund() public {
require(isFinalized);
require(!goalReached());
vault.refund(msg.sender);
}
/**
* @dev Checks whether funding goal was reached.
* @return Whether funding goal was reached
*/
function goalReached() public view returns (bool) {
return weiRaised >= goal;
}
/**
* @dev vault finalization task, called when owner calls finalize()
*/
function finalization() internal {
if (goalReached()) {
vault.close();
} else {
vault.enableRefunds();
}
super.finalization();
}
/**
* @dev Overrides Crowdsale fund forwarding, sending funds to vault.
*/
function _forwardFunds() internal {
vault.deposit.value(msg.value)(msg.sender);
}
} | finalization | function finalization() internal {
if (goalReached()) {
vault.close();
} else {
vault.enableRefunds();
}
super.finalization();
}
| /**
* @dev vault finalization task, called when owner calls finalize()
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
1008,
1178
]
} | 4,414 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | RefundableCrowdsale | contract RefundableCrowdsale is FinalizableCrowdsale {
using SafeMath for uint256;
// minimum amount of funds to be raised in weis
uint256 public goal;
// refund vault used to hold funds while crowdsale is running
RefundVault public vault;
/**
* @dev Constructor, creates RefundVault.
* @param _goal Funding goal
*/
function RefundableCrowdsale(uint256 _goal) public {
require(_goal > 0);
vault = new RefundVault(wallet);
goal = _goal;
}
/**
* @dev Investors can claim refunds here if crowdsale is unsuccessful
*/
function claimRefund() public {
require(isFinalized);
require(!goalReached());
vault.refund(msg.sender);
}
/**
* @dev Checks whether funding goal was reached.
* @return Whether funding goal was reached
*/
function goalReached() public view returns (bool) {
return weiRaised >= goal;
}
/**
* @dev vault finalization task, called when owner calls finalize()
*/
function finalization() internal {
if (goalReached()) {
vault.close();
} else {
vault.enableRefunds();
}
super.finalization();
}
/**
* @dev Overrides Crowdsale fund forwarding, sending funds to vault.
*/
function _forwardFunds() internal {
vault.deposit.value(msg.value)(msg.sender);
}
} | _forwardFunds | function _forwardFunds() internal {
vault.deposit.value(msg.value)(msg.sender);
}
| /**
* @dev Overrides Crowdsale fund forwarding, sending funds to vault.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
1267,
1359
]
} | 4,415 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | SafeMath | library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
} | mul | function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
| /**
* @dev Multiplies two numbers, throws on overflow.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
89,
266
]
} | 4,416 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | SafeMath | library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
} | div | function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
| /**
* @dev Integer division of two numbers, truncating the quotient.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
350,
630
]
} | 4,417 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | SafeMath | library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
} | sub | function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
| /**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
744,
860
]
} | 4,418 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | SafeMath | library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
} | add | function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
| /**
* @dev Adds two numbers, throws on overflow.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
924,
1054
]
} | 4,419 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | MintedCrowdsale | contract MintedCrowdsale is Crowdsale {
/**
* @dev Overrides delivery by minting tokens upon purchase.
* @param _beneficiary Token purchaser
* @param _tokenAmount Number of tokens to be minted
*/
function _deliverTokens(address _beneficiary, uint256 _tokenAmount) internal {
require(MintableToken(token).mint(_beneficiary, _tokenAmount));
}
} | _deliverTokens | function _deliverTokens(address _beneficiary, uint256 _tokenAmount) internal {
require(MintableToken(token).mint(_beneficiary, _tokenAmount));
}
| /**
* @dev Overrides delivery by minting tokens upon purchase.
* @param _beneficiary Token purchaser
* @param _tokenAmount Number of tokens to be minted
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
218,
373
]
} | 4,420 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | BasicToken | contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
} | totalSupply | function totalSupply() public view returns (uint256) {
return totalSupply_;
}
| /**
* @dev total number of tokens in existence
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
199,
287
]
} | 4,421 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | BasicToken | contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
} | transfer | function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
| /**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
445,
777
]
} | 4,422 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | BasicToken | contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
} | balanceOf | function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
| /**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
983,
1087
]
} | 4,423 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | StandardToken | contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
} | transferFrom | function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
| /**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
401,
858
]
} | 4,424 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | StandardToken | contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
} | approve | function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
| /**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
1490,
1685
]
} | 4,425 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | StandardToken | contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
} | allowance | function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
| /**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
2009,
2140
]
} | 4,426 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | StandardToken | contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
} | increaseApproval | function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
| /**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
2606,
2875
]
} | 4,427 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | StandardToken | contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
} | decreaseApproval | function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
| /**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
3346,
3761
]
} | 4,428 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | MintableToken | contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
} | mint | function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
| /**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
483,
766
]
} | 4,429 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | MintableToken | contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
} | finishMinting | function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
| /**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
883,
1030
]
} | 4,430 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | CappedToken | contract CappedToken is MintableToken {
uint256 public cap;
function CappedToken(uint256 _cap) public {
require(_cap > 0);
cap = _cap;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
require(totalSupply_.add(_amount) <= cap);
return super.mint(_to, _amount);
}
} | mint | function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
require(totalSupply_.add(_amount) <= cap);
return super.mint(_to, _amount);
}
| /**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
401,
582
]
} | 4,431 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | CappedCrowdsale | contract CappedCrowdsale is Crowdsale {
using SafeMath for uint256;
uint256 public cap;
/**
* @dev Constructor, takes maximum amount of wei accepted in the crowdsale.
* @param _cap Max amount of wei to be contributed
*/
function CappedCrowdsale(uint256 _cap) public {
require(_cap > 0);
cap = _cap;
}
/**
* @dev Checks whether the cap has been reached.
* @return Whether the cap was reached
*/
function capReached() public view returns (bool) {
return weiRaised >= cap;
}
/**
* @dev Extend parent behavior requiring purchase to respect the funding cap.
* @param _beneficiary Token purchaser
* @param _weiAmount Amount of wei contributed
*/
function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal {
super._preValidatePurchase(_beneficiary, _weiAmount);
require(weiRaised.add(_weiAmount) <= cap);
}
} | CappedCrowdsale | function CappedCrowdsale(uint256 _cap) public {
require(_cap > 0);
cap = _cap;
}
| /**
* @dev Constructor, takes maximum amount of wei accepted in the crowdsale.
* @param _cap Max amount of wei to be contributed
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
246,
342
]
} | 4,432 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | CappedCrowdsale | contract CappedCrowdsale is Crowdsale {
using SafeMath for uint256;
uint256 public cap;
/**
* @dev Constructor, takes maximum amount of wei accepted in the crowdsale.
* @param _cap Max amount of wei to be contributed
*/
function CappedCrowdsale(uint256 _cap) public {
require(_cap > 0);
cap = _cap;
}
/**
* @dev Checks whether the cap has been reached.
* @return Whether the cap was reached
*/
function capReached() public view returns (bool) {
return weiRaised >= cap;
}
/**
* @dev Extend parent behavior requiring purchase to respect the funding cap.
* @param _beneficiary Token purchaser
* @param _weiAmount Amount of wei contributed
*/
function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal {
super._preValidatePurchase(_beneficiary, _weiAmount);
require(weiRaised.add(_weiAmount) <= cap);
}
} | capReached | function capReached() public view returns (bool) {
return weiRaised >= cap;
}
| /**
* @dev Checks whether the cap has been reached.
* @return Whether the cap was reached
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
454,
542
]
} | 4,433 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | CappedCrowdsale | contract CappedCrowdsale is Crowdsale {
using SafeMath for uint256;
uint256 public cap;
/**
* @dev Constructor, takes maximum amount of wei accepted in the crowdsale.
* @param _cap Max amount of wei to be contributed
*/
function CappedCrowdsale(uint256 _cap) public {
require(_cap > 0);
cap = _cap;
}
/**
* @dev Checks whether the cap has been reached.
* @return Whether the cap was reached
*/
function capReached() public view returns (bool) {
return weiRaised >= cap;
}
/**
* @dev Extend parent behavior requiring purchase to respect the funding cap.
* @param _beneficiary Token purchaser
* @param _weiAmount Amount of wei contributed
*/
function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal {
super._preValidatePurchase(_beneficiary, _weiAmount);
require(weiRaised.add(_weiAmount) <= cap);
}
} | _preValidatePurchase | function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal {
super._preValidatePurchase(_beneficiary, _weiAmount);
require(weiRaised.add(_weiAmount) <= cap);
}
| /**
* @dev Extend parent behavior requiring purchase to respect the funding cap.
* @param _beneficiary Token purchaser
* @param _weiAmount Amount of wei contributed
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
732,
929
]
} | 4,434 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | BaseMonoretoCrowdsale | contract BaseMonoretoCrowdsale is CappedCrowdsale, RefundableCrowdsale, MintedCrowdsale {
using SafeMath for uint256;
uint256 public usdEth;
uint256 public usdMnr;
uint256 public tokensPurchased;
uint256 public tokenTarget;
/**
* @dev USDMNR must be set as actual_value * CENT_DECIMALS
* @dev example: value 0.2$ per token must be set as 0.2 * CENT_DECIMALS
*/
uint256 public constant CENT_DECIMALS = 1e18;
// original contract owner, needed for transfering the ownership of token back after the end of crowdsale
address internal deployer;
function BaseMonoretoCrowdsale(uint256 _tokenTarget, uint256 _usdEth, uint256 _usdMnr) public
{
require(_tokenTarget > 0);
require(_usdEth > 0);
require(_usdMnr > 0);
tokenTarget = _tokenTarget;
usdEth = _usdEth;
usdMnr = _usdMnr;
deployer = msg.sender;
}
function setUsdEth(uint256 _usdEth) external onlyOwner {
usdEth = _usdEth;
rate = _usdEth.mul(CENT_DECIMALS).div(usdMnr);
}
function setUsdMnr(uint256 _usdMnr) external onlyOwner {
usdMnr = _usdMnr;
rate = usdEth.mul(CENT_DECIMALS).div(_usdMnr);
}
function hasClosed() public view returns (bool) {
return super.hasClosed() || capReached();
}
// If amount of wei sent is less than the threshold, revert.
uint256 public constant ETHER_THRESHOLD = 100 finney;
function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal {
uint256 newTokenAmount = tokensPurchased.add(_getTokenAmount(_weiAmount));
require(newTokenAmount <= tokenTarget);
require(_weiAmount >= ETHER_THRESHOLD);
super._preValidatePurchase(_beneficiary, _weiAmount);
}
function _getTokenAmount(uint256 _weiAmount) internal view returns (uint256) {
return _weiAmount.mul(rate); //mul(usdEth).mul(CENT_DECIMALS).div(usdMnr);
}
function _deliverTokens(address _beneficiary, uint256 _tokenAmount) internal {
tokensPurchased = tokensPurchased.add(_tokenAmount);
super._deliverTokens(_beneficiary, _tokenAmount);
}
/**
* @dev overriden template method from FinalizableCrowdsale.
* Returns the ownership of token to the original owner.
* The child contract should call super.finalization()
* AFTER executing its own finalizing actions.
*/
function finalization() internal {
super.finalization();
MonoretoToken castToken = MonoretoToken(token);
castToken.transferOwnership(deployer);
}
} | finalization | function finalization() internal {
super.finalization();
MonoretoToken castToken = MonoretoToken(token);
castToken.transferOwnership(deployer);
}
| /**
* @dev overriden template method from FinalizableCrowdsale.
* Returns the ownership of token to the original owner.
* The child contract should call super.finalization()
* AFTER executing its own finalizing actions.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
2499,
2683
]
} | 4,435 |
|||
MonoretoPreIco | MonoretoPreIco.sol | 0x94dec5b089cd891ebe84f66f5ed8ab105895faab | Solidity | MonoretoPreIco | contract MonoretoPreIco is BaseMonoretoCrowdsale {
function MonoretoPreIco(uint256 _openTime, uint256 _closeTime, uint256 _goal, uint256 _cap,
uint256 _centWeiRate, uint256 _centMnrRate,
uint256 _tokenTarget, uint256 _initialRate, address _ownerWallet, MonoretoToken _token) public
BaseMonoretoCrowdsale(_tokenTarget, _centWeiRate, _centMnrRate)
CappedCrowdsale(_cap)
RefundableCrowdsale(_goal)
FinalizableCrowdsale()
TimedCrowdsale(_openTime, _closeTime)
Crowdsale(_initialRate, _ownerWallet, _token)
{
require(_goal <= _cap);
}
/**
* @dev Pre-ICO finalization. Cap must be adjusted after pre-ico.
*/
function finalization() internal {
MonoretoToken castToken = MonoretoToken(token);
castToken.adjustCap();
super.finalization();
}
} | finalization | function finalization() internal {
MonoretoToken castToken = MonoretoToken(token);
castToken.adjustCap();
super.finalization();
}
| /**
* @dev Pre-ICO finalization. Cap must be adjusted after pre-ico.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://16a3efb0ae5cc12a7443d9bb205cfb230a7333bdd659240e28a91243f0a44a74 | {
"func_code_index": [
721,
889
]
} | 4,436 |
|||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | IERC20 | interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount)
external
returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
} | totalSupply | function totalSupply() external view returns (uint256);
| /**
* @dev Returns the amount of tokens in existence.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
94,
154
]
} | 4,437 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | IERC20 | interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount)
external
returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
} | balanceOf | function balanceOf(address account) external view returns (uint256);
| /**
* @dev Returns the amount of tokens owned by `account`.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
237,
310
]
} | 4,438 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | IERC20 | interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount)
external
returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
} | transfer | function transfer(address recipient, uint256 amount)
external
returns (bool);
| /**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
534,
634
]
} | 4,439 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | IERC20 | interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount)
external
returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
} | allowance | function allowance(address owner, address spender)
external
view
returns (uint256);
| /**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
913,
1028
]
} | 4,440 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | IERC20 | interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount)
external
returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
} | approve | function approve(address spender, uint256 amount) external returns (bool);
| /**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
1692,
1771
]
} | 4,441 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | IERC20 | interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount)
external
returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
} | transferFrom | function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
| /**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
2084,
2220
]
} | 4,442 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
} | add | function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
| /**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
259,
445
]
} | 4,443 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
} | sub | function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
| /**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
723,
864
]
} | 4,444 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
} | sub | function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
| /**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
1162,
1393
]
} | 4,445 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
} | mul | function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
| /**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
1647,
2123
]
} | 4,446 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
} | div | function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
| /**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
2594,
2731
]
} | 4,447 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
} | div | function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
| /**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
3222,
3539
]
} | 4,448 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
} | mod | function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
| /**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
3999,
4134
]
} | 4,449 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
} | mod | function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
| /**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
4614,
4819
]
} | 4,450 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | Address | library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{value: weiValue}(
data
);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | isContract | function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly {
size := extcodesize(account)
}
return size > 0;
}
| /**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
606,
1055
]
} | 4,451 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | Address | library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{value: weiValue}(
data
);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | sendValue | function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
| /**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
1985,
2459
]
} | 4,452 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | Address | library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{value: weiValue}(
data
);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | functionCall | function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
| /**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
3215,
3418
]
} | 4,453 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | Address | library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{value: weiValue}(
data
);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | functionCall | function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
| /**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
3643,
3878
]
} | 4,454 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | Address | library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{value: weiValue}(
data
);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | functionCallWithValue | function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
| /**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
4248,
4609
]
} | 4,455 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | Address | library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{value: weiValue}(
data
);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | functionCallWithValue | function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
return _functionCallWithValue(target, data, value, errorMessage);
}
| /**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
4860,
5261
]
} | 4,456 |
||
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | Ownable | contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
} | /**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/ | NatSpecMultiLine | owner | function owner() public view returns (address) {
return _owner;
}
| /**
* @dev Returns the address of the current owner.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
521,
605
]
} | 4,457 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | Ownable | contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
} | /**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/ | NatSpecMultiLine | renounceOwnership | function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
| /**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
1163,
1316
]
} | 4,458 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | Ownable | contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
} | /**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/ | NatSpecMultiLine | transferOwnership | function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
| /**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
1466,
1752
]
} | 4,459 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | name | function name() public view returns (string memory) {
return _name;
}
| /**
* @dev Returns the name of the token.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
898,
986
]
} | 4,460 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | symbol | function symbol() public view returns (string memory) {
return _symbol;
}
| /**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
1100,
1192
]
} | 4,461 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | decimals | function decimals() public view returns (uint8) {
return _decimals;
}
| /**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
1825,
1913
]
} | 4,462 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | totalSupply | function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
| /**
* @dev See {IERC20-totalSupply}.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
1973,
2078
]
} | 4,463 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | balanceOf | function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
| /**
* @dev See {IERC20-balanceOf}.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
2136,
2260
]
} | 4,464 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | transfer | function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
| /**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
2468,
2689
]
} | 4,465 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | allowance | function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
| /**
* @dev See {IERC20-allowance}.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
2747,
2953
]
} | 4,466 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | approve | function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
| /**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
3095,
3310
]
} | 4,467 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | transferFrom | function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
| /**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
3779,
4238
]
} | 4,468 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | increaseAllowance | function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
| /**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
4642,
4947
]
} | 4,469 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | decreaseAllowance | function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
| /**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
5445,
5850
]
} | 4,470 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | _transfer | function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
| /**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
6335,
6950
]
} | 4,471 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | _mint | function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
| /** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
7226,
7609
]
} | 4,472 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | _burn | function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
| /**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
7936,
8396
]
} | 4,473 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | _approve | function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
| /**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
8829,
9214
]
} | 4,474 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | _setupDecimals | function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
| /**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
9541,
9636
]
} | 4,475 |
YuaMikamiFinance | YuaMikamiFinance.sol | 0xb07b5316cf31b7a1f8e5ca96f3abfce63d5911ad | Solidity | ERC20 | contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public override view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
virtual
override
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"ERC20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(
amount,
"ERC20: transfer amount exceeds balance"
);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(
amount,
"ERC20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
} | /**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/ | NatSpecMultiLine | _beforeTokenTransfer | function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
| /**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/ | NatSpecMultiLine | v0.6.12+commit.27d51765 | Unlicense | ipfs://e3b1fc0f2a30c80547eaf937346c94209e72e00c7a5709de1b42caad3f3d34a9 | {
"func_code_index": [
10234,
10364
]
} | 4,476 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | SafeMath | library SafeMath {
/**
* @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
/**
* @dev Adds two numbers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
} | /**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/ | NatSpecMultiLine | sub | function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
| /**
* @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
138,
293
]
} | 4,477 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | SafeMath | library SafeMath {
/**
* @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
/**
* @dev Adds two numbers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
} | /**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/ | NatSpecMultiLine | add | function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
| /**
* @dev Adds two numbers, reverts on overflow.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
364,
519
]
} | 4,478 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | initialize | function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
| /**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
3874,
4139
]
} | 4,479 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | initializeDomainSeparator | function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
| /**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
4656,
5042
]
} | 4,480 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | totalSupply | function totalSupply() public view returns (uint256) {
return totalSupply_;
}
| /**
* @dev Total number of tokens in existence
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
5146,
5242
]
} | 4,481 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | transfer | function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
| /**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
5494,
5998
]
} | 4,482 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | balanceOf | function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
| /**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
6213,
6323
]
} | 4,483 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | transferFrom | function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
| /**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
6645,
7380
]
} | 4,484 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | approve | function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
| /**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
8024,
8327
]
} | 4,485 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | allowance | function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
| /**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
8663,
8847
]
} | 4,486 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | proposeOwner | function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
| /**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
9267,
9615
]
} | 4,487 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | disregardProposeOwner | function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
| /**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
9756,
10172
]
} | 4,488 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | claimOwnership | function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
| /**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
10301,
10574
]
} | 4,489 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | reclaimDDF | function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
| /**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
10786,
11018
]
} | 4,490 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | pause | function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
| /**
* @dev called by the owner to pause, triggers stopped state
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
11344,
11483
]
} | 4,491 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | unpause | function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
| /**
* @dev called by the owner to unpause, returns to normal state
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
11573,
11718
]
} | 4,492 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | setAssetProtectionRole | function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
| /**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
11951,
12289
]
} | 4,493 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | freeze | function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
| /**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
12565,
12767
]
} | 4,494 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | unfreeze | function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
| /**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
12899,
13107
]
} | 4,495 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | wipeFrozenAddress | function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
| /**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
13294,
13707
]
} | 4,496 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | isFrozen | function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
| /**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
13909,
14013
]
} | 4,497 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | setSupplyController | function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
| /**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
14219,
14632
]
} | 4,498 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | increaseSupply | function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
| /**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
15028,
15401
]
} | 4,499 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | decreaseSupply | function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
| /**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
15668,
16118
]
} | 4,500 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | nextSeqOf | function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
| // | LineComment | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
16485,
16597
]
} | 4,501 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | betaDelegatedTransfer | function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
| /**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
17357,
17927
]
} | 4,502 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | _betaDelegatedTransfer | function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
| /**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
19126,
21103
]
} | 4,503 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | betaDelegatedTransferBatch | function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
| /**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
22115,
22834
]
} | 4,504 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | isWhitelistedBetaDelegate | function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
| /**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
23076,
23212
]
} | 4,505 |
DDFImplementationV2 | DDFImplementationV2.sol | 0x6f0bb458067038f9c7992dcde2025f0eefb5ecf6 | Solidity | DDFImplementationV2 | contract DDFImplementationV2 {
/**
* MATH
*/
using SafeMath for uint256;
/**
* DATA
*/
// INITIALIZATION DATA
bool private initialized = false;
// ERC20 BASIC DATA
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
string public constant name = "DefiDao Fund"; // solium-disable-line
string public constant symbol = "DDF"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
// ERC20 DATA
mapping(address => mapping(address => uint256)) internal allowed;
// OWNER DATA PART 1
address public owner;
// PAUSABILITY DATA
bool public paused = false;
// ASSET PROTECTION DATA
address public assetProtectionRole;
mapping(address => bool) internal frozen;
// SUPPLY CONTROL DATA
address public supplyController;
// OWNER DATA PART 2
address public proposedOwner;
// DELEGATED TRANSFER DATA
address public betaDelegateWhitelister;
mapping(address => bool) internal betaDelegateWhitelist;
mapping(address => uint256) internal nextSeqs;
// EIP191 header for EIP712 prefix
string constant internal EIP191_HEADER = "\x19\x01";
// Hash of the EIP712 Domain Separator Schema
bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(
"EIP712Domain(string name,address verifyingContract)"
);
bytes32 constant internal EIP712_DELEGATED_TRANSFER_SCHEMA_HASH = keccak256(
"BetaDelegatedTransfer(address to,uint256 value,uint256 fee,uint256 seq,uint256 deadline)"
);
// Hash of the EIP712 Domain Separator data
// solhint-disable-next-line var-name-mixedcase
bytes32 public EIP712_DOMAIN_HASH;
/**
* EVENTS
*/
// ERC20 BASIC EVENTS
event Transfer(address indexed from, address indexed to, uint256 value);
// ERC20 EVENTS
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
// OWNABLE EVENTS
event OwnershipTransferProposed(
address indexed currentOwner,
address indexed proposedOwner
);
event OwnershipTransferDisregarded(
address indexed oldProposedOwner
);
event OwnershipTransferred(
address indexed oldOwner,
address indexed newOwner
);
// PAUSABLE EVENTS
event Pause();
event Unpause();
// ASSET PROTECTION EVENTS
event AddressFrozen(address indexed addr);
event AddressUnfrozen(address indexed addr);
event FrozenAddressWiped(address indexed addr);
event AssetProtectionRoleSet (
address indexed oldAssetProtectionRole,
address indexed newAssetProtectionRole
);
// SUPPLY CONTROL EVENTS
event SupplyIncreased(address indexed to, uint256 value);
event SupplyDecreased(address indexed from, uint256 value);
event SupplyControllerSet(
address indexed oldSupplyController,
address indexed newSupplyController
);
// DELEGATED TRANSFER EVENTS
event BetaDelegatedTransfer(
address indexed from, address indexed to, uint256 value, uint256 seq, uint256 fee
);
event BetaDelegateWhitelisterSet(
address indexed oldWhitelister,
address indexed newWhitelister
);
event BetaDelegateWhitelisted(address indexed newDelegate);
event BetaDelegateUnwhitelisted(address indexed oldDelegate);
/**
* FUNCTIONALITY
*/
// INITIALIZATION FUNCTIONALITY
/**
* @dev sets 0 initials tokens, the owner, and the supplyController.
* this serves as the constructor for the proxy but compiles to the
* memory model of the Implementation contract.
*/
function initialize() public {
require(!initialized, "already initialized");
owner = msg.sender;
assetProtectionRole = address(0);
totalSupply_ = 0;
supplyController = msg.sender;
initialized = true;
}
/**
* The constructor is used here to ensure that the implementation
* contract is initialized. An uncontrolled implementation
* contract might lead to misleading state
* for users who accidentally interact with it.
*/
constructor() public {
initialize();
pause();
// Added in V2
initializeDomainSeparator();
}
/**
* @dev To be called when upgrading the contract using upgradeAndCall to add delegated transfers
*/
function initializeDomainSeparator() public {
// hash the name context with the contract address
EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
keccak256(bytes(name)),
bytes32(address(this))
));
proposedOwner = address(0);
}
// ERC20 BASIC FUNCTIONALITY
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev Transfer token to a specified address from msg.sender
* Note: the use of Safemath ensures that _value is nonnegative.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[msg.sender], "address frozen");
require(_value <= balances[msg.sender], "insufficient funds");
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _addr The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _addr) public view returns (uint256) {
return balances[_addr];
}
// ERC20 FUNCTIONALITY
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(_to != address(0), "cannot transfer to address zero");
require(!frozen[_to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(_value <= balances[_from], "insufficient funds");
require(_value <= allowed[_from][msg.sender], "insufficient allowance");
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
require(!frozen[_spender] && !frozen[msg.sender], "address frozen");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
// OWNER FUNCTIONALITY
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
/**
* @dev Allows the current owner to begin transferring control of the contract to a proposedOwner
* @param _proposedOwner The address to transfer ownership to.
*/
function proposeOwner(address _proposedOwner) public onlyOwner {
require(_proposedOwner != address(0), "cannot transfer ownership to address zero");
require(msg.sender != _proposedOwner, "caller already is owner");
proposedOwner = _proposedOwner;
emit OwnershipTransferProposed(owner, proposedOwner);
}
/**
* @dev Allows the current owner or proposed owner to cancel transferring control of the contract to a proposedOwner
*/
function disregardProposeOwner() public {
require(msg.sender == proposedOwner || msg.sender == owner, "only proposedOwner or owner");
require(proposedOwner != address(0), "can only disregard a proposed owner that was previously set");
address _oldProposedOwner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferDisregarded(_oldProposedOwner);
}
/**
* @dev Allows the proposed owner to complete transferring control of the contract to the proposedOwner.
*/
function claimOwnership() public {
require(msg.sender == proposedOwner, "onlyProposedOwner");
address _oldOwner = owner;
owner = proposedOwner;
proposedOwner = address(0);
emit OwnershipTransferred(_oldOwner, owner);
}
/**
* @dev Reclaim all DDF at the contract address.
* This sends the DDF tokens that this contract add holding to the owner.
* Note: this is not affected by freeze constraints.
*/
function reclaimDDF() external onlyOwner {
uint256 _balance = balances[this];
balances[this] = 0;
balances[owner] = balances[owner].add(_balance);
emit Transfer(this, owner, _balance);
}
// PAUSABILITY FUNCTIONALITY
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused, "whenNotPaused");
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyOwner {
require(!paused, "already paused");
paused = true;
emit Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyOwner {
require(paused, "already unpaused");
paused = false;
emit Unpause();
}
// ASSET PROTECTION FUNCTIONALITY
/**
* @dev Sets a new asset protection role address.
* @param _newAssetProtectionRole The new address allowed to freeze/unfreeze addresses and seize their tokens.
*/
function setAssetProtectionRole(address _newAssetProtectionRole) public {
require(msg.sender == assetProtectionRole || msg.sender == owner, "only assetProtectionRole or Owner");
emit AssetProtectionRoleSet(assetProtectionRole, _newAssetProtectionRole);
assetProtectionRole = _newAssetProtectionRole;
}
modifier onlyAssetProtectionRole() {
require(msg.sender == assetProtectionRole, "onlyAssetProtectionRole");
_;
}
/**
* @dev Freezes an address balance from being transferred.
* @param _addr The new address to freeze.
*/
function freeze(address _addr) public onlyAssetProtectionRole {
require(!frozen[_addr], "address already frozen");
frozen[_addr] = true;
emit AddressFrozen(_addr);
}
/**
* @dev Unfreezes an address balance allowing transfer.
* @param _addr The new address to unfreeze.
*/
function unfreeze(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address already unfrozen");
frozen[_addr] = false;
emit AddressUnfrozen(_addr);
}
/**
* @dev Wipes the balance of a frozen address, burning the tokens
* and setting the approval to zero.
* @param _addr The new frozen address to wipe.
*/
function wipeFrozenAddress(address _addr) public onlyAssetProtectionRole {
require(frozen[_addr], "address is not frozen");
uint256 _balance = balances[_addr];
balances[_addr] = 0;
totalSupply_ = totalSupply_.sub(_balance);
emit FrozenAddressWiped(_addr);
emit SupplyDecreased(_addr, _balance);
emit Transfer(_addr, address(0), _balance);
}
/**
* @dev Gets whether the address is currently frozen.
* @param _addr The address to check if frozen.
* @return A bool representing whether the given address is frozen.
*/
function isFrozen(address _addr) public view returns (bool) {
return frozen[_addr];
}
// SUPPLY CONTROL FUNCTIONALITY
/**
* @dev Sets a new supply controller address.
* @param _newSupplyController The address allowed to burn/mint tokens to control supply.
*/
function setSupplyController(address _newSupplyController) public {
require(msg.sender == supplyController || msg.sender == owner, "only SupplyController or Owner");
require(_newSupplyController != address(0), "cannot set supply controller to address zero");
emit SupplyControllerSet(supplyController, _newSupplyController);
supplyController = _newSupplyController;
}
modifier onlySupplyController() {
require(msg.sender == supplyController, "onlySupplyController");
_;
}
/**
* @dev Increases the total supply by minting the specified number of tokens to the supply controller account.
* @param _value The number of tokens to add.
* @return A boolean that indicates if the operation was successful.
*/
function increaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
totalSupply_ = totalSupply_.add(_value);
balances[supplyController] = balances[supplyController].add(_value);
emit SupplyIncreased(supplyController, _value);
emit Transfer(address(0), supplyController, _value);
return true;
}
/**
* @dev Decreases the total supply by burning the specified number of tokens from the supply controller account.
* @param _value The number of tokens to remove.
* @return A boolean that indicates if the operation was successful.
*/
function decreaseSupply(uint256 _value) public onlySupplyController returns (bool success) {
require(_value <= balances[supplyController], "not enough supply");
balances[supplyController] = balances[supplyController].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit SupplyDecreased(supplyController, _value);
emit Transfer(supplyController, address(0), _value);
return true;
}
// DELEGATED TRANSFER FUNCTIONALITY
/**
* @dev returns the next seq for a target address.
* The transactor must submit nextSeqOf(transactor) in the next transaction for it to be valid.
* Note: that the seq context is specific to this smart contract.
* @param target The target address.
* @return the seq.
*/
//
function nextSeqOf(address target) public view returns (uint256) {
return nextSeqs[target];
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the delegatedTransfer msg.
* Splits a signature byte array into r,s,v for convenience.
* @param sig the signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the executor of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransfer(
bytes sig, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) public returns (bool) {
require(sig.length == 65, "signature should have length 65");
bytes32 r;
bytes32 s;
uint8 v;
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
}
require(_betaDelegatedTransfer(r, s, v, to, value, fee, seq, deadline), "failed transfer");
return true;
}
/**
* @dev Performs a transfer on behalf of the from address, identified by its signature on the betaDelegatedTransfer msg.
* Note: both the delegate and transactor sign in the fees. The transactor, however,
* has no control over the gas price, and therefore no control over the transaction time.
* Beta prefix chosen to avoid a name clash with an emerging standard in ERC865 or elsewhere.
* Internal to the contract - see betaDelegatedTransfer and betaDelegatedTransferBatch.
* @param r the r signature of the delgatedTransfer msg.
* @param s the s signature of the delgatedTransfer msg.
* @param v the v signature of the delgatedTransfer msg.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @param fee an optional ERC20 fee paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq a sequencing number included by the from address specific to this contract to protect from replays.
* @param deadline a block number after which the pre-signed transaction has expired.
* @return A boolean that indicates if the operation was successful.
*/
function _betaDelegatedTransfer(
bytes32 r, bytes32 s, uint8 v, address to, uint256 value, uint256 fee, uint256 seq, uint256 deadline
) internal whenNotPaused returns (bool) {
require(betaDelegateWhitelist[msg.sender], "Beta feature only accepts whitelisted delegates");
require(value > 0 || fee > 0, "cannot transfer zero tokens with zero fee");
require(block.number <= deadline, "transaction expired");
// prevent sig malleability from ecrecover()
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "signature incorrect");
require(v == 27 || v == 28, "signature incorrect");
// EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
bytes32 delegatedTransferHash = keccak256(abi.encodePacked(// solium-disable-line
EIP712_DELEGATED_TRANSFER_SCHEMA_HASH, bytes32(to), value, fee, seq, deadline
));
bytes32 hash = keccak256(abi.encodePacked(EIP191_HEADER, EIP712_DOMAIN_HASH, delegatedTransferHash));
address _from = ecrecover(hash, v, r, s);
require(_from != address(0), "error determining from address from signature");
require(to != address(0), "canno use address zero");
require(!frozen[to] && !frozen[_from] && !frozen[msg.sender], "address frozen");
require(value.add(fee) <= balances[_from], "insufficient fund");
require(nextSeqs[_from] == seq, "incorrect seq");
nextSeqs[_from] = nextSeqs[_from].add(1);
balances[_from] = balances[_from].sub(value.add(fee));
if (fee != 0) {
balances[msg.sender] = balances[msg.sender].add(fee);
emit Transfer(_from, msg.sender, fee);
}
balances[to] = balances[to].add(value);
emit Transfer(_from, to, value);
emit BetaDelegatedTransfer(_from, to, value, seq, fee);
return true;
}
/**
* @dev Performs an atomic batch of transfers on behalf of the from addresses, identified by their signatures.
* Lack of nested array support in arguments requires all arguments to be passed as equal size arrays where
* delegated transfer number i is the combination of all arguments at index i
* @param r the r signatures of the delgatedTransfer msg.
* @param s the s signatures of the delgatedTransfer msg.
* @param v the v signatures of the delgatedTransfer msg.
* @param to The addresses to transfer to.
* @param value The amounts to be transferred.
* @param fee optional ERC20 fees paid to the delegate of betaDelegatedTransfer by the from address.
* @param seq sequencing numbers included by the from address specific to this contract to protect from replays.
* @param deadline block numbers after which the pre-signed transactions have expired.
* @return A boolean that indicates if the operation was successful.
*/
function betaDelegatedTransferBatch(
bytes32[] r, bytes32[] s, uint8[] v, address[] to, uint256[] value, uint256[] fee, uint256[] seq, uint256[] deadline
) public returns (bool) {
require(r.length == s.length && r.length == v.length && r.length == to.length && r.length == value.length, "length mismatch");
require(r.length == fee.length && r.length == seq.length && r.length == deadline.length, "length mismatch");
for (uint i = 0; i < r.length; i++) {
require(
_betaDelegatedTransfer(r[i], s[i], v[i], to[i], value[i], fee[i], seq[i], deadline[i]),
"failed transfer"
);
}
return true;
}
/**
* @dev Gets whether the address is currently whitelisted for betaDelegateTransfer.
* @param _addr The address to check if whitelisted.
* @return A bool representing whether the given address is whitelisted.
*/
function isWhitelistedBetaDelegate(address _addr) public view returns (bool) {
return betaDelegateWhitelist[_addr];
}
/**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/
function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
modifier onlyBetaDelegateWhitelister() {
require(msg.sender == betaDelegateWhitelister, "onlyBetaDelegateWhitelister");
_;
}
/**
* @dev Whitelists an address to allow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function whitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(!betaDelegateWhitelist[_addr], "delegate already whitelisted");
betaDelegateWhitelist[_addr] = true;
emit BetaDelegateWhitelisted(_addr);
}
/**
* @dev Unwhitelists an address to disallow calling BetaDelegatedTransfer.
* @param _addr The new address to whitelist.
*/
function unwhitelistBetaDelegate(address _addr) public onlyBetaDelegateWhitelister {
require(betaDelegateWhitelist[_addr], "delegate not whitelisted");
betaDelegateWhitelist[_addr] = false;
emit BetaDelegateUnwhitelisted(_addr);
}
} | /**
* @title DDFImplementationV2
* @dev this contract is a Pausable ERC20 token with Burn and Mint
* controlled by a central SupplyController. By implementing DDFosImplementation
* this contract also includes external methods for setting
* a new implementation contract for the Proxy.
* NOTE: The storage defined here will actually be held in the Proxy
* contract and all calls to this contract should be made through
* the proxy, including admin actions done as owner or supplyController.
* Any call to transfer against this contract should fail
* with insufficient funds since no tokens will be issued there.
*/ | NatSpecMultiLine | setBetaDelegateWhitelister | function setBetaDelegateWhitelister(address _newWhitelister) public {
require(msg.sender == betaDelegateWhitelister || msg.sender == owner, "only Whitelister or Owner");
betaDelegateWhitelister = _newWhitelister;
emit BetaDelegateWhitelisterSet(betaDelegateWhitelister, _newWhitelister);
}
| /**
* @dev Sets a new betaDelegate whitelister.
* @param _newWhitelister The address allowed to whitelist betaDelegates.
*/ | NatSpecMultiLine | v0.4.24+commit.e67f0147 | MIT | bzzr://ba709ffd60160b55cc55286e2d83f71ab49527b7a8a71c42a63a355bed1d4d6d | {
"func_code_index": [
23362,
23688
]
} | 4,506 |
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