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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