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SolidarityDnToken | SolidarityDnToken.sol | 0x299bdf0e6878e958177a4cde76411fc17138a2b0 | Solidity | SolidarityDnToken | contract SolidarityDnToken is ERC20Mintable {
// name of the token
string private _name = "SolidarityDnToken";
// symbol of the token
string private _symbol = "SOLDN";
// decimals of the token
uint8 private _decimals = 18;
// limit of emission (minting)
uint256 public emissionLimit = 1000000000000* 10 ** 18;
// if additional minting of tokens is impossible
bool public mintingFinished;
// registered contracts (to prevent loss of token via transfer function)
mapping (address => bool) private _contracts;
// prevent minting of tokens when it is finished.
// prevent total supply to exceed the limit of emission.
modifier canMint(uint256 amount) {
require(amount > 0);
require(!mintingFinished);
require(totalSupply().add(amount) <= emissionLimit);
_;
}
/**
* @dev constructor function that is called once at deployment of the contract.
* @param initialOwner Address of owner.
*/
constructor(address initialOwner) public Ownable(initialOwner) {
}
/**
* @dev ERC20 mint function (available only to the minters).
* @param account Address to mint token.
* @param amount Amount of tokens to mint.
*/
function mint(address account, uint256 amount) public onlyMinter canMint(amount) returns (bool) {
_mint(account, amount);
return true;
}
/**
* @dev Stop any additional minting of tokens forever.
* Available only to the minters.
*/
function finishMinting() external onlyMinter {
mintingFinished = true;
}
/**
* @dev Allows to send tokens (via Approve and TransferFrom) to other smart contract.
* @param spender Address of smart contracts to work with.
* @param amount Amount of tokens to send.
* @param extraData Any extra data.
*/
function approveAndCall(address spender, uint256 amount, bytes memory extraData) public returns (bool) {
require(approve(spender, amount));
IApproveAndCallFallBack(spender).receiveApproval(msg.sender, amount, address(this), extraData);
return true;
}
/**
* @dev Allows to register other smart contracts (to prevent loss of tokens via transfer function).
* @param addr Address of smart contracts to work with.
*/
function registerContract(address addr) public onlyOwner {
require(_isContract(addr));
_contracts[addr] = true;
}
/**
* @dev Allows to unregister registered smart contracts.
* @param addr Address of smart contracts to work with.
*/
function unregisterContract(address addr) external onlyOwner {
_contracts[addr] = false;
}
/**
* @dev modified transfer function that allows to safely send tokens to smart contract.
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/
function transfer(address to, uint256 value) public returns (bool) {
if (_contracts[to]) {
approveAndCall(to, value, new bytes(0));
} else {
super.transfer(to, value);
}
return true;
}
/**
* @return the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @return the symbol of the token.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @return the number of decimals of the token.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @return true if the address is a сontract
*/
function _isContract(address addr) internal view returns (bool) {
uint size;
assembly { size := extcodesize(addr) }
return size > 0;
}
} | /**
* @title The main project contract.
* @author https://grox.solutions
*/ | NatSpecMultiLine | name | function name() public view returns (string memory) {
return _name;
}
| /**
* @return the name of the token.
*/ | NatSpecMultiLine | v0.5.12+commit.7709ece9 | None | bzzr://241cf645f2f5629c7849fdd192492ef5387929b54ac35e8c200ba9deebc3443f | {
"func_code_index": [
3337,
3425
]
} | 56,361 |
SolidarityDnToken | SolidarityDnToken.sol | 0x299bdf0e6878e958177a4cde76411fc17138a2b0 | Solidity | SolidarityDnToken | contract SolidarityDnToken is ERC20Mintable {
// name of the token
string private _name = "SolidarityDnToken";
// symbol of the token
string private _symbol = "SOLDN";
// decimals of the token
uint8 private _decimals = 18;
// limit of emission (minting)
uint256 public emissionLimit = 1000000000000* 10 ** 18;
// if additional minting of tokens is impossible
bool public mintingFinished;
// registered contracts (to prevent loss of token via transfer function)
mapping (address => bool) private _contracts;
// prevent minting of tokens when it is finished.
// prevent total supply to exceed the limit of emission.
modifier canMint(uint256 amount) {
require(amount > 0);
require(!mintingFinished);
require(totalSupply().add(amount) <= emissionLimit);
_;
}
/**
* @dev constructor function that is called once at deployment of the contract.
* @param initialOwner Address of owner.
*/
constructor(address initialOwner) public Ownable(initialOwner) {
}
/**
* @dev ERC20 mint function (available only to the minters).
* @param account Address to mint token.
* @param amount Amount of tokens to mint.
*/
function mint(address account, uint256 amount) public onlyMinter canMint(amount) returns (bool) {
_mint(account, amount);
return true;
}
/**
* @dev Stop any additional minting of tokens forever.
* Available only to the minters.
*/
function finishMinting() external onlyMinter {
mintingFinished = true;
}
/**
* @dev Allows to send tokens (via Approve and TransferFrom) to other smart contract.
* @param spender Address of smart contracts to work with.
* @param amount Amount of tokens to send.
* @param extraData Any extra data.
*/
function approveAndCall(address spender, uint256 amount, bytes memory extraData) public returns (bool) {
require(approve(spender, amount));
IApproveAndCallFallBack(spender).receiveApproval(msg.sender, amount, address(this), extraData);
return true;
}
/**
* @dev Allows to register other smart contracts (to prevent loss of tokens via transfer function).
* @param addr Address of smart contracts to work with.
*/
function registerContract(address addr) public onlyOwner {
require(_isContract(addr));
_contracts[addr] = true;
}
/**
* @dev Allows to unregister registered smart contracts.
* @param addr Address of smart contracts to work with.
*/
function unregisterContract(address addr) external onlyOwner {
_contracts[addr] = false;
}
/**
* @dev modified transfer function that allows to safely send tokens to smart contract.
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/
function transfer(address to, uint256 value) public returns (bool) {
if (_contracts[to]) {
approveAndCall(to, value, new bytes(0));
} else {
super.transfer(to, value);
}
return true;
}
/**
* @return the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @return the symbol of the token.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @return the number of decimals of the token.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @return true if the address is a сontract
*/
function _isContract(address addr) internal view returns (bool) {
uint size;
assembly { size := extcodesize(addr) }
return size > 0;
}
} | /**
* @title The main project contract.
* @author https://grox.solutions
*/ | NatSpecMultiLine | symbol | function symbol() public view returns (string memory) {
return _symbol;
}
| /**
* @return the symbol of the token.
*/ | NatSpecMultiLine | v0.5.12+commit.7709ece9 | None | bzzr://241cf645f2f5629c7849fdd192492ef5387929b54ac35e8c200ba9deebc3443f | {
"func_code_index": [
3487,
3579
]
} | 56,362 |
SolidarityDnToken | SolidarityDnToken.sol | 0x299bdf0e6878e958177a4cde76411fc17138a2b0 | Solidity | SolidarityDnToken | contract SolidarityDnToken is ERC20Mintable {
// name of the token
string private _name = "SolidarityDnToken";
// symbol of the token
string private _symbol = "SOLDN";
// decimals of the token
uint8 private _decimals = 18;
// limit of emission (minting)
uint256 public emissionLimit = 1000000000000* 10 ** 18;
// if additional minting of tokens is impossible
bool public mintingFinished;
// registered contracts (to prevent loss of token via transfer function)
mapping (address => bool) private _contracts;
// prevent minting of tokens when it is finished.
// prevent total supply to exceed the limit of emission.
modifier canMint(uint256 amount) {
require(amount > 0);
require(!mintingFinished);
require(totalSupply().add(amount) <= emissionLimit);
_;
}
/**
* @dev constructor function that is called once at deployment of the contract.
* @param initialOwner Address of owner.
*/
constructor(address initialOwner) public Ownable(initialOwner) {
}
/**
* @dev ERC20 mint function (available only to the minters).
* @param account Address to mint token.
* @param amount Amount of tokens to mint.
*/
function mint(address account, uint256 amount) public onlyMinter canMint(amount) returns (bool) {
_mint(account, amount);
return true;
}
/**
* @dev Stop any additional minting of tokens forever.
* Available only to the minters.
*/
function finishMinting() external onlyMinter {
mintingFinished = true;
}
/**
* @dev Allows to send tokens (via Approve and TransferFrom) to other smart contract.
* @param spender Address of smart contracts to work with.
* @param amount Amount of tokens to send.
* @param extraData Any extra data.
*/
function approveAndCall(address spender, uint256 amount, bytes memory extraData) public returns (bool) {
require(approve(spender, amount));
IApproveAndCallFallBack(spender).receiveApproval(msg.sender, amount, address(this), extraData);
return true;
}
/**
* @dev Allows to register other smart contracts (to prevent loss of tokens via transfer function).
* @param addr Address of smart contracts to work with.
*/
function registerContract(address addr) public onlyOwner {
require(_isContract(addr));
_contracts[addr] = true;
}
/**
* @dev Allows to unregister registered smart contracts.
* @param addr Address of smart contracts to work with.
*/
function unregisterContract(address addr) external onlyOwner {
_contracts[addr] = false;
}
/**
* @dev modified transfer function that allows to safely send tokens to smart contract.
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/
function transfer(address to, uint256 value) public returns (bool) {
if (_contracts[to]) {
approveAndCall(to, value, new bytes(0));
} else {
super.transfer(to, value);
}
return true;
}
/**
* @return the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @return the symbol of the token.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @return the number of decimals of the token.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @return true if the address is a сontract
*/
function _isContract(address addr) internal view returns (bool) {
uint size;
assembly { size := extcodesize(addr) }
return size > 0;
}
} | /**
* @title The main project contract.
* @author https://grox.solutions
*/ | NatSpecMultiLine | decimals | function decimals() public view returns (uint8) {
return _decimals;
}
| /**
* @return the number of decimals of the token.
*/ | NatSpecMultiLine | v0.5.12+commit.7709ece9 | None | bzzr://241cf645f2f5629c7849fdd192492ef5387929b54ac35e8c200ba9deebc3443f | {
"func_code_index": [
3653,
3741
]
} | 56,363 |
SolidarityDnToken | SolidarityDnToken.sol | 0x299bdf0e6878e958177a4cde76411fc17138a2b0 | Solidity | SolidarityDnToken | contract SolidarityDnToken is ERC20Mintable {
// name of the token
string private _name = "SolidarityDnToken";
// symbol of the token
string private _symbol = "SOLDN";
// decimals of the token
uint8 private _decimals = 18;
// limit of emission (minting)
uint256 public emissionLimit = 1000000000000* 10 ** 18;
// if additional minting of tokens is impossible
bool public mintingFinished;
// registered contracts (to prevent loss of token via transfer function)
mapping (address => bool) private _contracts;
// prevent minting of tokens when it is finished.
// prevent total supply to exceed the limit of emission.
modifier canMint(uint256 amount) {
require(amount > 0);
require(!mintingFinished);
require(totalSupply().add(amount) <= emissionLimit);
_;
}
/**
* @dev constructor function that is called once at deployment of the contract.
* @param initialOwner Address of owner.
*/
constructor(address initialOwner) public Ownable(initialOwner) {
}
/**
* @dev ERC20 mint function (available only to the minters).
* @param account Address to mint token.
* @param amount Amount of tokens to mint.
*/
function mint(address account, uint256 amount) public onlyMinter canMint(amount) returns (bool) {
_mint(account, amount);
return true;
}
/**
* @dev Stop any additional minting of tokens forever.
* Available only to the minters.
*/
function finishMinting() external onlyMinter {
mintingFinished = true;
}
/**
* @dev Allows to send tokens (via Approve and TransferFrom) to other smart contract.
* @param spender Address of smart contracts to work with.
* @param amount Amount of tokens to send.
* @param extraData Any extra data.
*/
function approveAndCall(address spender, uint256 amount, bytes memory extraData) public returns (bool) {
require(approve(spender, amount));
IApproveAndCallFallBack(spender).receiveApproval(msg.sender, amount, address(this), extraData);
return true;
}
/**
* @dev Allows to register other smart contracts (to prevent loss of tokens via transfer function).
* @param addr Address of smart contracts to work with.
*/
function registerContract(address addr) public onlyOwner {
require(_isContract(addr));
_contracts[addr] = true;
}
/**
* @dev Allows to unregister registered smart contracts.
* @param addr Address of smart contracts to work with.
*/
function unregisterContract(address addr) external onlyOwner {
_contracts[addr] = false;
}
/**
* @dev modified transfer function that allows to safely send tokens to smart contract.
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/
function transfer(address to, uint256 value) public returns (bool) {
if (_contracts[to]) {
approveAndCall(to, value, new bytes(0));
} else {
super.transfer(to, value);
}
return true;
}
/**
* @return the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @return the symbol of the token.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @return the number of decimals of the token.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @return true if the address is a сontract
*/
function _isContract(address addr) internal view returns (bool) {
uint size;
assembly { size := extcodesize(addr) }
return size > 0;
}
} | /**
* @title The main project contract.
* @author https://grox.solutions
*/ | NatSpecMultiLine | _isContract | function _isContract(address addr) internal view returns (bool) {
uint size;
assembly { size := extcodesize(addr) }
return size > 0;
}
| /**
* @return true if the address is a сontract
*/ | NatSpecMultiLine | v0.5.12+commit.7709ece9 | None | bzzr://241cf645f2f5629c7849fdd192492ef5387929b54ac35e8c200ba9deebc3443f | {
"func_code_index": [
3812,
3983
]
} | 56,364 |
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | 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;
}
} | /**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/ | NatSpecMultiLine | 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://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
89,
266
]
} | 56,365 |
|
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | 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;
}
} | /**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/ | NatSpecMultiLine | 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://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
350,
630
]
} | 56,366 |
|
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | 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;
}
} | /**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/ | NatSpecMultiLine | 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://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
744,
860
]
} | 56,367 |
|
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | 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;
}
} | /**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/ | NatSpecMultiLine | 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://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
924,
1054
]
} | 56,368 |
|
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | Solidity | IOwned | contract IOwned {
// this function isn't abstract since the compiler emits automatically generated getter functions as external
function owner() public view returns (address) {}
function transferOwnership(address _newOwner) public;
function acceptOwnership() public;
} | /*
Owned contract interface
*/ | Comment | owner | function owner() public view returns (address) {}
| // this function isn't abstract since the compiler emits automatically generated getter functions as external | LineComment | v0.4.23+commit.124ca40d | bzzr://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
134,
188
]
} | 56,369 |
|
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | Solidity | ITokenConverter | contract ITokenConverter {
function convertibleTokenCount() public view returns (uint16);
function convertibleToken(uint16 _tokenIndex) public view returns (address);
function getReturn(IERC20Token _fromToken, IERC20Token _toToken, uint256 _amount) public view returns (uint256);
function convert(IERC20Token _fromToken, IERC20Token _toToken, uint256 _amount, uint256 _minReturn) public returns (uint256);
// deprecated, backward compatibility
function change(IERC20Token _fromToken, IERC20Token _toToken, uint256 _amount, uint256 _minReturn) public returns (uint256);
} | /*
EIP228 Token Converter interface
*/ | Comment | change | function change(IERC20Token _fromToken, IERC20Token _toToken, uint256 _amount, uint256 _minReturn) public returns (uint256);
| // deprecated, backward compatibility | LineComment | v0.4.23+commit.124ca40d | bzzr://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
470,
599
]
} | 56,370 |
|
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | Solidity | admined | contract admined { //This token contract is administered
address public admin; //Admin address is public
/**
* @dev Contract constructor
* define initial administrator
*/
constructor() internal {
admin = msg.sender; //Set initial admin to contract creator
emit Admined(admin);
}
modifier onlyAdmin() { //A modifier to define admin-only functions
require(msg.sender == admin);
_;
}
/**
* @dev Function to set new admin address
* @param _newAdmin The address to transfer administration to
*/
function transferAdminship(address _newAdmin) onlyAdmin public { //Admin can be transfered
require(_newAdmin != 0);
admin = _newAdmin;
emit TransferAdminship(admin);
}
event TransferAdminship(address newAdminister);
event Admined(address administer);
} | /**
* @title Admin parameters
* @dev Define administration parameters for this contract
*/ | NatSpecMultiLine | transferAdminship | function transferAdminship(address _newAdmin) onlyAdmin public { //Admin can be transfered
require(_newAdmin != 0);
admin = _newAdmin;
emit TransferAdminship(admin);
}
| /**
* @dev Function to set new admin address
* @param _newAdmin The address to transfer administration to
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
597,
801
]
} | 56,371 |
|
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | Solidity | MEGA | contract MEGA is admined,IERC20Token { //Standar definition of an ERC20Token
using SafeMath for uint256; //SafeMath is used for uint256 operations
///////////////////////////////////////////////////////////////////////////////////////
/// Token Related ///
///////////////////////////////////////////////////////////////////////////////////////
mapping (address => uint256) balances; //A mapping of all balances per address
mapping (address => mapping (address => uint256)) allowed; //A mapping of all allowances
uint256 public totalSupply;
/**
* @notice Get the balance of an _owner address.
* @param _owner The address to be query.
*/
function balanceOf(address _owner) public constant returns (uint256 bal) {
return balances[_owner];
}
/**
* @notice transfer _value tokens to address _to
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transfer(address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
if(_to == address(this)){
burnToken(msg.sender, _value);
sell(msg.sender,_value);
return true;
} else {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
}
/**
* @notice Transfer _value tokens from address _from to address _to using allowance msg.sender allowance on _from
* @param _from The address where tokens comes.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @notice Assign allowance _value to _spender address to use the msg.sender balance
* @param _spender The address to be allowed to spend.
* @param _value The amount to be allowed.
* @return success with boolean value true
*/
function approve(address _spender, uint256 _value) public returns (bool success) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0)); //exploit mitigation
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @notice Get the allowance of an specified address to use another address balance.
* @param _owner The address of the owner of the tokens.
* @param _spender The address of the allowed spender.
* @return remaining with the allowance value
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/**
* @dev Mint token to an specified address.
* @param _target The address of the receiver of the tokens.
* @param _mintedAmount amount to mint.
*/
function mintToken(address _target, uint256 _mintedAmount) private {
balances[_target] = SafeMath.add(balances[_target], _mintedAmount);
totalSupply = SafeMath.add(totalSupply, _mintedAmount);
emit Transfer(0, this, _mintedAmount);
emit Transfer(this, _target, _mintedAmount);
}
/**
* @dev Burn token of an specified address.
* @param _target The address of the holder of the tokens.
* @param _burnedAmount amount to burn.
*/
function burnToken(address _target, uint256 _burnedAmount) private {
balances[_target] = SafeMath.sub(balances[_target], _burnedAmount);
totalSupply = SafeMath.sub(totalSupply, _burnedAmount);
emit Burned(_target, _burnedAmount);
}
/**
* @dev Log Events
*/
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Burned(address indexed _target, uint256 _value);
///////////////////////////////////////////////////////////////////////////////////////
/// Investment related ///
///////////////////////////////////////////////////////////////////////////////////////
//Internal Variables
IBancorConverter BancorConverter = IBancorConverter(0xc6725aE749677f21E4d8f85F41cFB6DE49b9Db29);
IBancorQuickConverter Bancor = IBancorQuickConverter(0xcF1CC6eD5B653DeF7417E3fA93992c3FFe49139B);
IBancorGasPriceLimit BancorGas = IBancorGasPriceLimit(0x607a5C47978e2Eb6d59C6C6f51bc0bF411f4b85a);
IERC20Token ETHToken = IERC20Token(0xc0829421C1d260BD3cB3E0F06cfE2D52db2cE315);
IERC20Token BNTToken = IERC20Token(0x1F573D6Fb3F13d689FF844B4cE37794d79a7FF1C);
IERC20Token EOSRelay = IERC20Token(0x507b06c23d7Cb313194dBF6A6D80297137fb5E01);
IERC20Token EOSToken = IERC20Token(0x86Fa049857E0209aa7D9e616F7eb3b3B78ECfdb0);
IERC20Token ELFRelay = IERC20Token(0x0F2318565f1996CB1eD2F88e172135791BC1FcBf);
IERC20Token ELFToken = IERC20Token(0xbf2179859fc6D5BEE9Bf9158632Dc51678a4100e);
IERC20Token OMGRelay = IERC20Token(0x99eBD396Ce7AA095412a4Cd1A0C959D6Fd67B340);
IERC20Token OMGToken = IERC20Token(0xd26114cd6EE289AccF82350c8d8487fedB8A0C07);
IERC20Token POARelay = IERC20Token(0x564c07255AFe5050D82c8816F78dA13f2B17ac6D);
IERC20Token POAToken = IERC20Token(0x6758B7d441a9739b98552B373703d8d3d14f9e62);
IERC20Token DRGNRelay = IERC20Token(0xa7774F9386E1653645E1A08fb7Aae525B4DeDb24);
IERC20Token DRGNToken = IERC20Token(0x419c4dB4B9e25d6Db2AD9691ccb832C8D9fDA05E);
IERC20Token SRNRelay = IERC20Token(0xd2Deb679ed81238CaeF8E0c32257092cEcc8888b);
IERC20Token SRNToken = IERC20Token(0x68d57c9a1C35f63E2c83eE8e49A64e9d70528D25);
IERC20Token WAXRelay = IERC20Token(0x67563E7A0F13642068F6F999e48c690107A4571F);
IERC20Token WAXToken = IERC20Token(0x39Bb259F66E1C59d5ABEF88375979b4D20D98022);
IERC20Token POWRRelay = IERC20Token(0x168D7Bbf38E17941173a352f1352DF91a7771dF3);
IERC20Token POWRToken = IERC20Token(0x595832F8FC6BF59c85C527fEC3740A1b7a361269);
bool buyFlag = false; //False = set rate - True = auto rate
//Path to exchanges
mapping(uint8 => IERC20Token[]) paths;
mapping(uint8 => IERC20Token[]) reversePaths;
//public variables
address public feeWallet;
uint256 public rate = 6850;
//token related
string public name = "MEGAINVEST v4";
uint8 public decimals = 18;
string public symbol = "MEG4";
string public version = '2';
constructor(address _feeWallet) public {
feeWallet = _feeWallet;
paths[0] = [ETHToken,BNTToken,BNTToken,EOSRelay,EOSRelay,EOSRelay,EOSToken];
paths[1] = [ETHToken,BNTToken,BNTToken,ELFRelay,ELFRelay,ELFRelay,ELFToken];
paths[2] = [ETHToken,BNTToken,BNTToken,OMGRelay,OMGRelay,OMGRelay,OMGToken];
paths[3] = [ETHToken,BNTToken,BNTToken,POARelay,POARelay,POARelay,POAToken];
paths[4] = [ETHToken,BNTToken,BNTToken,DRGNRelay,DRGNRelay,DRGNRelay,DRGNToken];
paths[5] = [ETHToken,BNTToken,BNTToken,SRNRelay,SRNRelay,SRNRelay,SRNToken];
paths[6] = [ETHToken,BNTToken,BNTToken,WAXRelay,WAXRelay,WAXRelay,WAXToken];
paths[7] = [ETHToken,BNTToken,BNTToken,POWRRelay,POWRRelay,POWRRelay,POWRToken];
reversePaths[0] = [EOSToken,EOSRelay,EOSRelay,EOSRelay,BNTToken,BNTToken,ETHToken];
reversePaths[1] = [ELFToken,ELFRelay,ELFRelay,ELFRelay,BNTToken,BNTToken,ETHToken];
reversePaths[2] = [OMGToken,OMGRelay,OMGRelay,OMGRelay,BNTToken,BNTToken,ETHToken];
reversePaths[3] = [POAToken,POARelay,POARelay,POARelay,BNTToken,BNTToken,ETHToken];
reversePaths[4] = [DRGNToken,DRGNRelay,DRGNRelay,DRGNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[5] = [SRNToken,SRNRelay,SRNRelay,SRNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[6] = [WAXToken,WAXRelay,WAXRelay,WAXRelay,BNTToken,BNTToken,ETHToken];
reversePaths[7] = [POWRToken,POWRRelay,POWRRelay,POWRRelay,BNTToken,BNTToken,ETHToken];
}
function updateBancorContracts(
IBancorConverter _BancorConverter,
IBancorQuickConverter _Bancor,
IBancorGasPriceLimit _BancorGas) public onlyAdmin{
BancorConverter = _BancorConverter;
Bancor = _Bancor;
BancorGas = _BancorGas;
}
function updatePath(IERC20Token[] _path, IERC20Token[] _reversePath, uint8 _index) public onlyAdmin{
paths[_index] = _path;
reversePaths[_index] = _reversePath;
}
function changeBuyFlag(bool _flag) public onlyAdmin {
buyFlag = _flag;
}
function updateRate(uint256 _rate) public onlyAdmin {
rate = _rate;
}
function valueOnContract() public view returns (uint256){
ISmartToken smartToken;
IERC20Token toToken;
ITokenConverter converter;
IERC20Token[] memory _path;
uint256 pathLength;
uint256 sumUp;
uint256 _amount;
IERC20Token _fromToken;
for(uint8 j=0;j<8;j++){
_path = reversePaths[j];
// iterate over the conversion path
pathLength = _path.length;
_fromToken = _path[0];
_amount = _fromToken.balanceOf(address(this));
for (uint256 i = 1; i < pathLength; i += 2) {
smartToken = ISmartToken(_path[i]);
toToken = _path[i + 1];
converter = ITokenConverter(smartToken.owner());
// make the conversion - if it's the last one, also provide the minimum return value
_amount = converter.getReturn(_fromToken, toToken, _amount);
_fromToken = toToken;
}
sumUp += _amount;
}
return sumUp;
}
function buy() public payable {
BancorGas.validateGasPrice(tx.gasprice);
if(buyFlag == false){
tokenBuy = msg.value.mul(rate);
} else {
uint256 valueStored = valueOnContract();
uint256 tokenBuy;
if(totalSupply > valueStored){
uint256 tempRate = totalSupply.div(valueStored); // Must be > 0 Tok/Eth
tokenBuy = msg.value.mul(tempRate); // Eth * Tok / Eth = Tok
} else {
uint256 tempPrice = valueStored.div(totalSupply); // Must be > 0 Eth/Tok
tokenBuy = msg.value.div(tempPrice); // Eth / Eth / Tok = Tok
}
}
uint256 ethFee = msg.value.mul(5)/1000; //5/1000 => 0.5%
uint256 ethToInvest = msg.value.sub(ethFee);
feeWallet.transfer(ethFee);
invest(ethToInvest);
mintToken(msg.sender,tokenBuy);
}
function invest(uint256 _amount) private {
uint256 standarValue = _amount.div(8);
for(uint8 i=0; i<8; i++){
Bancor.convertForPrioritized.value(standarValue)(paths[i],standarValue,1,address(this),0,0,0,0x0,0x0);
}
}
function sell(address _target, uint256 _amount) private {
uint256 tempBalance;
uint256 tempFee;
uint256 dividedSupply = totalSupply.div(1e5); //ethereum is not decimals friendly
if(dividedSupply == 0 || _amount < dividedSupply) revert();
uint256 factor = _amount.div(dividedSupply);
if( factor == 0) revert();
tempBalance = EOSToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
EOSToken.transfer(feeWallet,tempFee);
EOSToken.transfer(_target,tempBalance);
tempBalance = ELFToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
ELFToken.transfer(feeWallet,tempFee);
ELFToken.transfer(_target,tempBalance);
tempBalance = OMGToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
OMGToken.transfer(feeWallet,tempFee);
OMGToken.transfer(_target,tempBalance);
tempBalance = POAToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POAToken.transfer(feeWallet,tempFee);
POAToken.transfer(_target,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
DRGNToken.transfer(feeWallet,tempFee);
DRGNToken.transfer(_target,tempBalance);
tempBalance = SRNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
SRNToken.transfer(feeWallet,tempFee);
SRNToken.transfer(_target,tempBalance);
tempBalance = WAXToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
WAXToken.transfer(feeWallet,tempFee);
WAXToken.transfer(_target,tempBalance);
tempBalance = POWRToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POWRToken.transfer(feeWallet,tempFee);
POWRToken.transfer(_target,tempBalance);
}
function emergency() onlyAdmin public{
uint256 tempBalance;
msg.sender.transfer(address(this).balance);
tempBalance = EOSToken.balanceOf(this);
EOSToken.transfer(admin,tempBalance);
tempBalance = ELFToken.balanceOf(this);
ELFToken.transfer(admin,tempBalance);
tempBalance = OMGToken.balanceOf(this);
OMGToken.transfer(admin,tempBalance);
tempBalance = POAToken.balanceOf(this);
POAToken.transfer(admin,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
DRGNToken.transfer(admin,tempBalance);
tempBalance = SRNToken.balanceOf(this);
SRNToken.transfer(admin,tempBalance);
tempBalance = WAXToken.balanceOf(this);
WAXToken.transfer(admin,tempBalance);
tempBalance = POWRToken.balanceOf(this);
POWRToken.transfer(admin,tempBalance);
}
function claimTokens(IERC20Token _address, address _to) onlyAdmin public {
require(_to != address(0));
uint256 remainder = _address.balanceOf(this); //Check remainder tokens
_address.transfer(_to,remainder); //Transfer tokens to creator
}
function () public payable{
buy();
}
} | /**
* @title ERC20Token
* @notice Token definition contract
*/ | NatSpecMultiLine | balanceOf | function balanceOf(address _owner) public constant returns (uint256 bal) {
return balances[_owner];
}
| /**
* @notice Get the balance of an _owner address.
* @param _owner The address to be query.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
707,
827
]
} | 56,372 |
|
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | Solidity | MEGA | contract MEGA is admined,IERC20Token { //Standar definition of an ERC20Token
using SafeMath for uint256; //SafeMath is used for uint256 operations
///////////////////////////////////////////////////////////////////////////////////////
/// Token Related ///
///////////////////////////////////////////////////////////////////////////////////////
mapping (address => uint256) balances; //A mapping of all balances per address
mapping (address => mapping (address => uint256)) allowed; //A mapping of all allowances
uint256 public totalSupply;
/**
* @notice Get the balance of an _owner address.
* @param _owner The address to be query.
*/
function balanceOf(address _owner) public constant returns (uint256 bal) {
return balances[_owner];
}
/**
* @notice transfer _value tokens to address _to
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transfer(address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
if(_to == address(this)){
burnToken(msg.sender, _value);
sell(msg.sender,_value);
return true;
} else {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
}
/**
* @notice Transfer _value tokens from address _from to address _to using allowance msg.sender allowance on _from
* @param _from The address where tokens comes.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @notice Assign allowance _value to _spender address to use the msg.sender balance
* @param _spender The address to be allowed to spend.
* @param _value The amount to be allowed.
* @return success with boolean value true
*/
function approve(address _spender, uint256 _value) public returns (bool success) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0)); //exploit mitigation
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @notice Get the allowance of an specified address to use another address balance.
* @param _owner The address of the owner of the tokens.
* @param _spender The address of the allowed spender.
* @return remaining with the allowance value
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/**
* @dev Mint token to an specified address.
* @param _target The address of the receiver of the tokens.
* @param _mintedAmount amount to mint.
*/
function mintToken(address _target, uint256 _mintedAmount) private {
balances[_target] = SafeMath.add(balances[_target], _mintedAmount);
totalSupply = SafeMath.add(totalSupply, _mintedAmount);
emit Transfer(0, this, _mintedAmount);
emit Transfer(this, _target, _mintedAmount);
}
/**
* @dev Burn token of an specified address.
* @param _target The address of the holder of the tokens.
* @param _burnedAmount amount to burn.
*/
function burnToken(address _target, uint256 _burnedAmount) private {
balances[_target] = SafeMath.sub(balances[_target], _burnedAmount);
totalSupply = SafeMath.sub(totalSupply, _burnedAmount);
emit Burned(_target, _burnedAmount);
}
/**
* @dev Log Events
*/
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Burned(address indexed _target, uint256 _value);
///////////////////////////////////////////////////////////////////////////////////////
/// Investment related ///
///////////////////////////////////////////////////////////////////////////////////////
//Internal Variables
IBancorConverter BancorConverter = IBancorConverter(0xc6725aE749677f21E4d8f85F41cFB6DE49b9Db29);
IBancorQuickConverter Bancor = IBancorQuickConverter(0xcF1CC6eD5B653DeF7417E3fA93992c3FFe49139B);
IBancorGasPriceLimit BancorGas = IBancorGasPriceLimit(0x607a5C47978e2Eb6d59C6C6f51bc0bF411f4b85a);
IERC20Token ETHToken = IERC20Token(0xc0829421C1d260BD3cB3E0F06cfE2D52db2cE315);
IERC20Token BNTToken = IERC20Token(0x1F573D6Fb3F13d689FF844B4cE37794d79a7FF1C);
IERC20Token EOSRelay = IERC20Token(0x507b06c23d7Cb313194dBF6A6D80297137fb5E01);
IERC20Token EOSToken = IERC20Token(0x86Fa049857E0209aa7D9e616F7eb3b3B78ECfdb0);
IERC20Token ELFRelay = IERC20Token(0x0F2318565f1996CB1eD2F88e172135791BC1FcBf);
IERC20Token ELFToken = IERC20Token(0xbf2179859fc6D5BEE9Bf9158632Dc51678a4100e);
IERC20Token OMGRelay = IERC20Token(0x99eBD396Ce7AA095412a4Cd1A0C959D6Fd67B340);
IERC20Token OMGToken = IERC20Token(0xd26114cd6EE289AccF82350c8d8487fedB8A0C07);
IERC20Token POARelay = IERC20Token(0x564c07255AFe5050D82c8816F78dA13f2B17ac6D);
IERC20Token POAToken = IERC20Token(0x6758B7d441a9739b98552B373703d8d3d14f9e62);
IERC20Token DRGNRelay = IERC20Token(0xa7774F9386E1653645E1A08fb7Aae525B4DeDb24);
IERC20Token DRGNToken = IERC20Token(0x419c4dB4B9e25d6Db2AD9691ccb832C8D9fDA05E);
IERC20Token SRNRelay = IERC20Token(0xd2Deb679ed81238CaeF8E0c32257092cEcc8888b);
IERC20Token SRNToken = IERC20Token(0x68d57c9a1C35f63E2c83eE8e49A64e9d70528D25);
IERC20Token WAXRelay = IERC20Token(0x67563E7A0F13642068F6F999e48c690107A4571F);
IERC20Token WAXToken = IERC20Token(0x39Bb259F66E1C59d5ABEF88375979b4D20D98022);
IERC20Token POWRRelay = IERC20Token(0x168D7Bbf38E17941173a352f1352DF91a7771dF3);
IERC20Token POWRToken = IERC20Token(0x595832F8FC6BF59c85C527fEC3740A1b7a361269);
bool buyFlag = false; //False = set rate - True = auto rate
//Path to exchanges
mapping(uint8 => IERC20Token[]) paths;
mapping(uint8 => IERC20Token[]) reversePaths;
//public variables
address public feeWallet;
uint256 public rate = 6850;
//token related
string public name = "MEGAINVEST v4";
uint8 public decimals = 18;
string public symbol = "MEG4";
string public version = '2';
constructor(address _feeWallet) public {
feeWallet = _feeWallet;
paths[0] = [ETHToken,BNTToken,BNTToken,EOSRelay,EOSRelay,EOSRelay,EOSToken];
paths[1] = [ETHToken,BNTToken,BNTToken,ELFRelay,ELFRelay,ELFRelay,ELFToken];
paths[2] = [ETHToken,BNTToken,BNTToken,OMGRelay,OMGRelay,OMGRelay,OMGToken];
paths[3] = [ETHToken,BNTToken,BNTToken,POARelay,POARelay,POARelay,POAToken];
paths[4] = [ETHToken,BNTToken,BNTToken,DRGNRelay,DRGNRelay,DRGNRelay,DRGNToken];
paths[5] = [ETHToken,BNTToken,BNTToken,SRNRelay,SRNRelay,SRNRelay,SRNToken];
paths[6] = [ETHToken,BNTToken,BNTToken,WAXRelay,WAXRelay,WAXRelay,WAXToken];
paths[7] = [ETHToken,BNTToken,BNTToken,POWRRelay,POWRRelay,POWRRelay,POWRToken];
reversePaths[0] = [EOSToken,EOSRelay,EOSRelay,EOSRelay,BNTToken,BNTToken,ETHToken];
reversePaths[1] = [ELFToken,ELFRelay,ELFRelay,ELFRelay,BNTToken,BNTToken,ETHToken];
reversePaths[2] = [OMGToken,OMGRelay,OMGRelay,OMGRelay,BNTToken,BNTToken,ETHToken];
reversePaths[3] = [POAToken,POARelay,POARelay,POARelay,BNTToken,BNTToken,ETHToken];
reversePaths[4] = [DRGNToken,DRGNRelay,DRGNRelay,DRGNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[5] = [SRNToken,SRNRelay,SRNRelay,SRNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[6] = [WAXToken,WAXRelay,WAXRelay,WAXRelay,BNTToken,BNTToken,ETHToken];
reversePaths[7] = [POWRToken,POWRRelay,POWRRelay,POWRRelay,BNTToken,BNTToken,ETHToken];
}
function updateBancorContracts(
IBancorConverter _BancorConverter,
IBancorQuickConverter _Bancor,
IBancorGasPriceLimit _BancorGas) public onlyAdmin{
BancorConverter = _BancorConverter;
Bancor = _Bancor;
BancorGas = _BancorGas;
}
function updatePath(IERC20Token[] _path, IERC20Token[] _reversePath, uint8 _index) public onlyAdmin{
paths[_index] = _path;
reversePaths[_index] = _reversePath;
}
function changeBuyFlag(bool _flag) public onlyAdmin {
buyFlag = _flag;
}
function updateRate(uint256 _rate) public onlyAdmin {
rate = _rate;
}
function valueOnContract() public view returns (uint256){
ISmartToken smartToken;
IERC20Token toToken;
ITokenConverter converter;
IERC20Token[] memory _path;
uint256 pathLength;
uint256 sumUp;
uint256 _amount;
IERC20Token _fromToken;
for(uint8 j=0;j<8;j++){
_path = reversePaths[j];
// iterate over the conversion path
pathLength = _path.length;
_fromToken = _path[0];
_amount = _fromToken.balanceOf(address(this));
for (uint256 i = 1; i < pathLength; i += 2) {
smartToken = ISmartToken(_path[i]);
toToken = _path[i + 1];
converter = ITokenConverter(smartToken.owner());
// make the conversion - if it's the last one, also provide the minimum return value
_amount = converter.getReturn(_fromToken, toToken, _amount);
_fromToken = toToken;
}
sumUp += _amount;
}
return sumUp;
}
function buy() public payable {
BancorGas.validateGasPrice(tx.gasprice);
if(buyFlag == false){
tokenBuy = msg.value.mul(rate);
} else {
uint256 valueStored = valueOnContract();
uint256 tokenBuy;
if(totalSupply > valueStored){
uint256 tempRate = totalSupply.div(valueStored); // Must be > 0 Tok/Eth
tokenBuy = msg.value.mul(tempRate); // Eth * Tok / Eth = Tok
} else {
uint256 tempPrice = valueStored.div(totalSupply); // Must be > 0 Eth/Tok
tokenBuy = msg.value.div(tempPrice); // Eth / Eth / Tok = Tok
}
}
uint256 ethFee = msg.value.mul(5)/1000; //5/1000 => 0.5%
uint256 ethToInvest = msg.value.sub(ethFee);
feeWallet.transfer(ethFee);
invest(ethToInvest);
mintToken(msg.sender,tokenBuy);
}
function invest(uint256 _amount) private {
uint256 standarValue = _amount.div(8);
for(uint8 i=0; i<8; i++){
Bancor.convertForPrioritized.value(standarValue)(paths[i],standarValue,1,address(this),0,0,0,0x0,0x0);
}
}
function sell(address _target, uint256 _amount) private {
uint256 tempBalance;
uint256 tempFee;
uint256 dividedSupply = totalSupply.div(1e5); //ethereum is not decimals friendly
if(dividedSupply == 0 || _amount < dividedSupply) revert();
uint256 factor = _amount.div(dividedSupply);
if( factor == 0) revert();
tempBalance = EOSToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
EOSToken.transfer(feeWallet,tempFee);
EOSToken.transfer(_target,tempBalance);
tempBalance = ELFToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
ELFToken.transfer(feeWallet,tempFee);
ELFToken.transfer(_target,tempBalance);
tempBalance = OMGToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
OMGToken.transfer(feeWallet,tempFee);
OMGToken.transfer(_target,tempBalance);
tempBalance = POAToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POAToken.transfer(feeWallet,tempFee);
POAToken.transfer(_target,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
DRGNToken.transfer(feeWallet,tempFee);
DRGNToken.transfer(_target,tempBalance);
tempBalance = SRNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
SRNToken.transfer(feeWallet,tempFee);
SRNToken.transfer(_target,tempBalance);
tempBalance = WAXToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
WAXToken.transfer(feeWallet,tempFee);
WAXToken.transfer(_target,tempBalance);
tempBalance = POWRToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POWRToken.transfer(feeWallet,tempFee);
POWRToken.transfer(_target,tempBalance);
}
function emergency() onlyAdmin public{
uint256 tempBalance;
msg.sender.transfer(address(this).balance);
tempBalance = EOSToken.balanceOf(this);
EOSToken.transfer(admin,tempBalance);
tempBalance = ELFToken.balanceOf(this);
ELFToken.transfer(admin,tempBalance);
tempBalance = OMGToken.balanceOf(this);
OMGToken.transfer(admin,tempBalance);
tempBalance = POAToken.balanceOf(this);
POAToken.transfer(admin,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
DRGNToken.transfer(admin,tempBalance);
tempBalance = SRNToken.balanceOf(this);
SRNToken.transfer(admin,tempBalance);
tempBalance = WAXToken.balanceOf(this);
WAXToken.transfer(admin,tempBalance);
tempBalance = POWRToken.balanceOf(this);
POWRToken.transfer(admin,tempBalance);
}
function claimTokens(IERC20Token _address, address _to) onlyAdmin public {
require(_to != address(0));
uint256 remainder = _address.balanceOf(this); //Check remainder tokens
_address.transfer(_to,remainder); //Transfer tokens to creator
}
function () public payable{
buy();
}
} | /**
* @title ERC20Token
* @notice Token definition contract
*/ | NatSpecMultiLine | transfer | function transfer(address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
if(_to == address(this)){
burnToken(msg.sender, _value);
sell(msg.sender,_value);
return true;
} else {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
}
| /**
* @notice transfer _value tokens to address _to
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
1052,
1595
]
} | 56,373 |
|
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | Solidity | MEGA | contract MEGA is admined,IERC20Token { //Standar definition of an ERC20Token
using SafeMath for uint256; //SafeMath is used for uint256 operations
///////////////////////////////////////////////////////////////////////////////////////
/// Token Related ///
///////////////////////////////////////////////////////////////////////////////////////
mapping (address => uint256) balances; //A mapping of all balances per address
mapping (address => mapping (address => uint256)) allowed; //A mapping of all allowances
uint256 public totalSupply;
/**
* @notice Get the balance of an _owner address.
* @param _owner The address to be query.
*/
function balanceOf(address _owner) public constant returns (uint256 bal) {
return balances[_owner];
}
/**
* @notice transfer _value tokens to address _to
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transfer(address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
if(_to == address(this)){
burnToken(msg.sender, _value);
sell(msg.sender,_value);
return true;
} else {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
}
/**
* @notice Transfer _value tokens from address _from to address _to using allowance msg.sender allowance on _from
* @param _from The address where tokens comes.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @notice Assign allowance _value to _spender address to use the msg.sender balance
* @param _spender The address to be allowed to spend.
* @param _value The amount to be allowed.
* @return success with boolean value true
*/
function approve(address _spender, uint256 _value) public returns (bool success) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0)); //exploit mitigation
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @notice Get the allowance of an specified address to use another address balance.
* @param _owner The address of the owner of the tokens.
* @param _spender The address of the allowed spender.
* @return remaining with the allowance value
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/**
* @dev Mint token to an specified address.
* @param _target The address of the receiver of the tokens.
* @param _mintedAmount amount to mint.
*/
function mintToken(address _target, uint256 _mintedAmount) private {
balances[_target] = SafeMath.add(balances[_target], _mintedAmount);
totalSupply = SafeMath.add(totalSupply, _mintedAmount);
emit Transfer(0, this, _mintedAmount);
emit Transfer(this, _target, _mintedAmount);
}
/**
* @dev Burn token of an specified address.
* @param _target The address of the holder of the tokens.
* @param _burnedAmount amount to burn.
*/
function burnToken(address _target, uint256 _burnedAmount) private {
balances[_target] = SafeMath.sub(balances[_target], _burnedAmount);
totalSupply = SafeMath.sub(totalSupply, _burnedAmount);
emit Burned(_target, _burnedAmount);
}
/**
* @dev Log Events
*/
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Burned(address indexed _target, uint256 _value);
///////////////////////////////////////////////////////////////////////////////////////
/// Investment related ///
///////////////////////////////////////////////////////////////////////////////////////
//Internal Variables
IBancorConverter BancorConverter = IBancorConverter(0xc6725aE749677f21E4d8f85F41cFB6DE49b9Db29);
IBancorQuickConverter Bancor = IBancorQuickConverter(0xcF1CC6eD5B653DeF7417E3fA93992c3FFe49139B);
IBancorGasPriceLimit BancorGas = IBancorGasPriceLimit(0x607a5C47978e2Eb6d59C6C6f51bc0bF411f4b85a);
IERC20Token ETHToken = IERC20Token(0xc0829421C1d260BD3cB3E0F06cfE2D52db2cE315);
IERC20Token BNTToken = IERC20Token(0x1F573D6Fb3F13d689FF844B4cE37794d79a7FF1C);
IERC20Token EOSRelay = IERC20Token(0x507b06c23d7Cb313194dBF6A6D80297137fb5E01);
IERC20Token EOSToken = IERC20Token(0x86Fa049857E0209aa7D9e616F7eb3b3B78ECfdb0);
IERC20Token ELFRelay = IERC20Token(0x0F2318565f1996CB1eD2F88e172135791BC1FcBf);
IERC20Token ELFToken = IERC20Token(0xbf2179859fc6D5BEE9Bf9158632Dc51678a4100e);
IERC20Token OMGRelay = IERC20Token(0x99eBD396Ce7AA095412a4Cd1A0C959D6Fd67B340);
IERC20Token OMGToken = IERC20Token(0xd26114cd6EE289AccF82350c8d8487fedB8A0C07);
IERC20Token POARelay = IERC20Token(0x564c07255AFe5050D82c8816F78dA13f2B17ac6D);
IERC20Token POAToken = IERC20Token(0x6758B7d441a9739b98552B373703d8d3d14f9e62);
IERC20Token DRGNRelay = IERC20Token(0xa7774F9386E1653645E1A08fb7Aae525B4DeDb24);
IERC20Token DRGNToken = IERC20Token(0x419c4dB4B9e25d6Db2AD9691ccb832C8D9fDA05E);
IERC20Token SRNRelay = IERC20Token(0xd2Deb679ed81238CaeF8E0c32257092cEcc8888b);
IERC20Token SRNToken = IERC20Token(0x68d57c9a1C35f63E2c83eE8e49A64e9d70528D25);
IERC20Token WAXRelay = IERC20Token(0x67563E7A0F13642068F6F999e48c690107A4571F);
IERC20Token WAXToken = IERC20Token(0x39Bb259F66E1C59d5ABEF88375979b4D20D98022);
IERC20Token POWRRelay = IERC20Token(0x168D7Bbf38E17941173a352f1352DF91a7771dF3);
IERC20Token POWRToken = IERC20Token(0x595832F8FC6BF59c85C527fEC3740A1b7a361269);
bool buyFlag = false; //False = set rate - True = auto rate
//Path to exchanges
mapping(uint8 => IERC20Token[]) paths;
mapping(uint8 => IERC20Token[]) reversePaths;
//public variables
address public feeWallet;
uint256 public rate = 6850;
//token related
string public name = "MEGAINVEST v4";
uint8 public decimals = 18;
string public symbol = "MEG4";
string public version = '2';
constructor(address _feeWallet) public {
feeWallet = _feeWallet;
paths[0] = [ETHToken,BNTToken,BNTToken,EOSRelay,EOSRelay,EOSRelay,EOSToken];
paths[1] = [ETHToken,BNTToken,BNTToken,ELFRelay,ELFRelay,ELFRelay,ELFToken];
paths[2] = [ETHToken,BNTToken,BNTToken,OMGRelay,OMGRelay,OMGRelay,OMGToken];
paths[3] = [ETHToken,BNTToken,BNTToken,POARelay,POARelay,POARelay,POAToken];
paths[4] = [ETHToken,BNTToken,BNTToken,DRGNRelay,DRGNRelay,DRGNRelay,DRGNToken];
paths[5] = [ETHToken,BNTToken,BNTToken,SRNRelay,SRNRelay,SRNRelay,SRNToken];
paths[6] = [ETHToken,BNTToken,BNTToken,WAXRelay,WAXRelay,WAXRelay,WAXToken];
paths[7] = [ETHToken,BNTToken,BNTToken,POWRRelay,POWRRelay,POWRRelay,POWRToken];
reversePaths[0] = [EOSToken,EOSRelay,EOSRelay,EOSRelay,BNTToken,BNTToken,ETHToken];
reversePaths[1] = [ELFToken,ELFRelay,ELFRelay,ELFRelay,BNTToken,BNTToken,ETHToken];
reversePaths[2] = [OMGToken,OMGRelay,OMGRelay,OMGRelay,BNTToken,BNTToken,ETHToken];
reversePaths[3] = [POAToken,POARelay,POARelay,POARelay,BNTToken,BNTToken,ETHToken];
reversePaths[4] = [DRGNToken,DRGNRelay,DRGNRelay,DRGNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[5] = [SRNToken,SRNRelay,SRNRelay,SRNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[6] = [WAXToken,WAXRelay,WAXRelay,WAXRelay,BNTToken,BNTToken,ETHToken];
reversePaths[7] = [POWRToken,POWRRelay,POWRRelay,POWRRelay,BNTToken,BNTToken,ETHToken];
}
function updateBancorContracts(
IBancorConverter _BancorConverter,
IBancorQuickConverter _Bancor,
IBancorGasPriceLimit _BancorGas) public onlyAdmin{
BancorConverter = _BancorConverter;
Bancor = _Bancor;
BancorGas = _BancorGas;
}
function updatePath(IERC20Token[] _path, IERC20Token[] _reversePath, uint8 _index) public onlyAdmin{
paths[_index] = _path;
reversePaths[_index] = _reversePath;
}
function changeBuyFlag(bool _flag) public onlyAdmin {
buyFlag = _flag;
}
function updateRate(uint256 _rate) public onlyAdmin {
rate = _rate;
}
function valueOnContract() public view returns (uint256){
ISmartToken smartToken;
IERC20Token toToken;
ITokenConverter converter;
IERC20Token[] memory _path;
uint256 pathLength;
uint256 sumUp;
uint256 _amount;
IERC20Token _fromToken;
for(uint8 j=0;j<8;j++){
_path = reversePaths[j];
// iterate over the conversion path
pathLength = _path.length;
_fromToken = _path[0];
_amount = _fromToken.balanceOf(address(this));
for (uint256 i = 1; i < pathLength; i += 2) {
smartToken = ISmartToken(_path[i]);
toToken = _path[i + 1];
converter = ITokenConverter(smartToken.owner());
// make the conversion - if it's the last one, also provide the minimum return value
_amount = converter.getReturn(_fromToken, toToken, _amount);
_fromToken = toToken;
}
sumUp += _amount;
}
return sumUp;
}
function buy() public payable {
BancorGas.validateGasPrice(tx.gasprice);
if(buyFlag == false){
tokenBuy = msg.value.mul(rate);
} else {
uint256 valueStored = valueOnContract();
uint256 tokenBuy;
if(totalSupply > valueStored){
uint256 tempRate = totalSupply.div(valueStored); // Must be > 0 Tok/Eth
tokenBuy = msg.value.mul(tempRate); // Eth * Tok / Eth = Tok
} else {
uint256 tempPrice = valueStored.div(totalSupply); // Must be > 0 Eth/Tok
tokenBuy = msg.value.div(tempPrice); // Eth / Eth / Tok = Tok
}
}
uint256 ethFee = msg.value.mul(5)/1000; //5/1000 => 0.5%
uint256 ethToInvest = msg.value.sub(ethFee);
feeWallet.transfer(ethFee);
invest(ethToInvest);
mintToken(msg.sender,tokenBuy);
}
function invest(uint256 _amount) private {
uint256 standarValue = _amount.div(8);
for(uint8 i=0; i<8; i++){
Bancor.convertForPrioritized.value(standarValue)(paths[i],standarValue,1,address(this),0,0,0,0x0,0x0);
}
}
function sell(address _target, uint256 _amount) private {
uint256 tempBalance;
uint256 tempFee;
uint256 dividedSupply = totalSupply.div(1e5); //ethereum is not decimals friendly
if(dividedSupply == 0 || _amount < dividedSupply) revert();
uint256 factor = _amount.div(dividedSupply);
if( factor == 0) revert();
tempBalance = EOSToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
EOSToken.transfer(feeWallet,tempFee);
EOSToken.transfer(_target,tempBalance);
tempBalance = ELFToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
ELFToken.transfer(feeWallet,tempFee);
ELFToken.transfer(_target,tempBalance);
tempBalance = OMGToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
OMGToken.transfer(feeWallet,tempFee);
OMGToken.transfer(_target,tempBalance);
tempBalance = POAToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POAToken.transfer(feeWallet,tempFee);
POAToken.transfer(_target,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
DRGNToken.transfer(feeWallet,tempFee);
DRGNToken.transfer(_target,tempBalance);
tempBalance = SRNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
SRNToken.transfer(feeWallet,tempFee);
SRNToken.transfer(_target,tempBalance);
tempBalance = WAXToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
WAXToken.transfer(feeWallet,tempFee);
WAXToken.transfer(_target,tempBalance);
tempBalance = POWRToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POWRToken.transfer(feeWallet,tempFee);
POWRToken.transfer(_target,tempBalance);
}
function emergency() onlyAdmin public{
uint256 tempBalance;
msg.sender.transfer(address(this).balance);
tempBalance = EOSToken.balanceOf(this);
EOSToken.transfer(admin,tempBalance);
tempBalance = ELFToken.balanceOf(this);
ELFToken.transfer(admin,tempBalance);
tempBalance = OMGToken.balanceOf(this);
OMGToken.transfer(admin,tempBalance);
tempBalance = POAToken.balanceOf(this);
POAToken.transfer(admin,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
DRGNToken.transfer(admin,tempBalance);
tempBalance = SRNToken.balanceOf(this);
SRNToken.transfer(admin,tempBalance);
tempBalance = WAXToken.balanceOf(this);
WAXToken.transfer(admin,tempBalance);
tempBalance = POWRToken.balanceOf(this);
POWRToken.transfer(admin,tempBalance);
}
function claimTokens(IERC20Token _address, address _to) onlyAdmin public {
require(_to != address(0));
uint256 remainder = _address.balanceOf(this); //Check remainder tokens
_address.transfer(_to,remainder); //Transfer tokens to creator
}
function () public payable{
buy();
}
} | /**
* @title ERC20Token
* @notice Token definition contract
*/ | NatSpecMultiLine | transferFrom | function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _to, _value);
return true;
}
| /**
* @notice Transfer _value tokens from address _from to address _to using allowance msg.sender allowance on _from
* @param _from The address where tokens comes.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
1937,
2380
]
} | 56,374 |
|
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | Solidity | MEGA | contract MEGA is admined,IERC20Token { //Standar definition of an ERC20Token
using SafeMath for uint256; //SafeMath is used for uint256 operations
///////////////////////////////////////////////////////////////////////////////////////
/// Token Related ///
///////////////////////////////////////////////////////////////////////////////////////
mapping (address => uint256) balances; //A mapping of all balances per address
mapping (address => mapping (address => uint256)) allowed; //A mapping of all allowances
uint256 public totalSupply;
/**
* @notice Get the balance of an _owner address.
* @param _owner The address to be query.
*/
function balanceOf(address _owner) public constant returns (uint256 bal) {
return balances[_owner];
}
/**
* @notice transfer _value tokens to address _to
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transfer(address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
if(_to == address(this)){
burnToken(msg.sender, _value);
sell(msg.sender,_value);
return true;
} else {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
}
/**
* @notice Transfer _value tokens from address _from to address _to using allowance msg.sender allowance on _from
* @param _from The address where tokens comes.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @notice Assign allowance _value to _spender address to use the msg.sender balance
* @param _spender The address to be allowed to spend.
* @param _value The amount to be allowed.
* @return success with boolean value true
*/
function approve(address _spender, uint256 _value) public returns (bool success) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0)); //exploit mitigation
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @notice Get the allowance of an specified address to use another address balance.
* @param _owner The address of the owner of the tokens.
* @param _spender The address of the allowed spender.
* @return remaining with the allowance value
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/**
* @dev Mint token to an specified address.
* @param _target The address of the receiver of the tokens.
* @param _mintedAmount amount to mint.
*/
function mintToken(address _target, uint256 _mintedAmount) private {
balances[_target] = SafeMath.add(balances[_target], _mintedAmount);
totalSupply = SafeMath.add(totalSupply, _mintedAmount);
emit Transfer(0, this, _mintedAmount);
emit Transfer(this, _target, _mintedAmount);
}
/**
* @dev Burn token of an specified address.
* @param _target The address of the holder of the tokens.
* @param _burnedAmount amount to burn.
*/
function burnToken(address _target, uint256 _burnedAmount) private {
balances[_target] = SafeMath.sub(balances[_target], _burnedAmount);
totalSupply = SafeMath.sub(totalSupply, _burnedAmount);
emit Burned(_target, _burnedAmount);
}
/**
* @dev Log Events
*/
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Burned(address indexed _target, uint256 _value);
///////////////////////////////////////////////////////////////////////////////////////
/// Investment related ///
///////////////////////////////////////////////////////////////////////////////////////
//Internal Variables
IBancorConverter BancorConverter = IBancorConverter(0xc6725aE749677f21E4d8f85F41cFB6DE49b9Db29);
IBancorQuickConverter Bancor = IBancorQuickConverter(0xcF1CC6eD5B653DeF7417E3fA93992c3FFe49139B);
IBancorGasPriceLimit BancorGas = IBancorGasPriceLimit(0x607a5C47978e2Eb6d59C6C6f51bc0bF411f4b85a);
IERC20Token ETHToken = IERC20Token(0xc0829421C1d260BD3cB3E0F06cfE2D52db2cE315);
IERC20Token BNTToken = IERC20Token(0x1F573D6Fb3F13d689FF844B4cE37794d79a7FF1C);
IERC20Token EOSRelay = IERC20Token(0x507b06c23d7Cb313194dBF6A6D80297137fb5E01);
IERC20Token EOSToken = IERC20Token(0x86Fa049857E0209aa7D9e616F7eb3b3B78ECfdb0);
IERC20Token ELFRelay = IERC20Token(0x0F2318565f1996CB1eD2F88e172135791BC1FcBf);
IERC20Token ELFToken = IERC20Token(0xbf2179859fc6D5BEE9Bf9158632Dc51678a4100e);
IERC20Token OMGRelay = IERC20Token(0x99eBD396Ce7AA095412a4Cd1A0C959D6Fd67B340);
IERC20Token OMGToken = IERC20Token(0xd26114cd6EE289AccF82350c8d8487fedB8A0C07);
IERC20Token POARelay = IERC20Token(0x564c07255AFe5050D82c8816F78dA13f2B17ac6D);
IERC20Token POAToken = IERC20Token(0x6758B7d441a9739b98552B373703d8d3d14f9e62);
IERC20Token DRGNRelay = IERC20Token(0xa7774F9386E1653645E1A08fb7Aae525B4DeDb24);
IERC20Token DRGNToken = IERC20Token(0x419c4dB4B9e25d6Db2AD9691ccb832C8D9fDA05E);
IERC20Token SRNRelay = IERC20Token(0xd2Deb679ed81238CaeF8E0c32257092cEcc8888b);
IERC20Token SRNToken = IERC20Token(0x68d57c9a1C35f63E2c83eE8e49A64e9d70528D25);
IERC20Token WAXRelay = IERC20Token(0x67563E7A0F13642068F6F999e48c690107A4571F);
IERC20Token WAXToken = IERC20Token(0x39Bb259F66E1C59d5ABEF88375979b4D20D98022);
IERC20Token POWRRelay = IERC20Token(0x168D7Bbf38E17941173a352f1352DF91a7771dF3);
IERC20Token POWRToken = IERC20Token(0x595832F8FC6BF59c85C527fEC3740A1b7a361269);
bool buyFlag = false; //False = set rate - True = auto rate
//Path to exchanges
mapping(uint8 => IERC20Token[]) paths;
mapping(uint8 => IERC20Token[]) reversePaths;
//public variables
address public feeWallet;
uint256 public rate = 6850;
//token related
string public name = "MEGAINVEST v4";
uint8 public decimals = 18;
string public symbol = "MEG4";
string public version = '2';
constructor(address _feeWallet) public {
feeWallet = _feeWallet;
paths[0] = [ETHToken,BNTToken,BNTToken,EOSRelay,EOSRelay,EOSRelay,EOSToken];
paths[1] = [ETHToken,BNTToken,BNTToken,ELFRelay,ELFRelay,ELFRelay,ELFToken];
paths[2] = [ETHToken,BNTToken,BNTToken,OMGRelay,OMGRelay,OMGRelay,OMGToken];
paths[3] = [ETHToken,BNTToken,BNTToken,POARelay,POARelay,POARelay,POAToken];
paths[4] = [ETHToken,BNTToken,BNTToken,DRGNRelay,DRGNRelay,DRGNRelay,DRGNToken];
paths[5] = [ETHToken,BNTToken,BNTToken,SRNRelay,SRNRelay,SRNRelay,SRNToken];
paths[6] = [ETHToken,BNTToken,BNTToken,WAXRelay,WAXRelay,WAXRelay,WAXToken];
paths[7] = [ETHToken,BNTToken,BNTToken,POWRRelay,POWRRelay,POWRRelay,POWRToken];
reversePaths[0] = [EOSToken,EOSRelay,EOSRelay,EOSRelay,BNTToken,BNTToken,ETHToken];
reversePaths[1] = [ELFToken,ELFRelay,ELFRelay,ELFRelay,BNTToken,BNTToken,ETHToken];
reversePaths[2] = [OMGToken,OMGRelay,OMGRelay,OMGRelay,BNTToken,BNTToken,ETHToken];
reversePaths[3] = [POAToken,POARelay,POARelay,POARelay,BNTToken,BNTToken,ETHToken];
reversePaths[4] = [DRGNToken,DRGNRelay,DRGNRelay,DRGNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[5] = [SRNToken,SRNRelay,SRNRelay,SRNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[6] = [WAXToken,WAXRelay,WAXRelay,WAXRelay,BNTToken,BNTToken,ETHToken];
reversePaths[7] = [POWRToken,POWRRelay,POWRRelay,POWRRelay,BNTToken,BNTToken,ETHToken];
}
function updateBancorContracts(
IBancorConverter _BancorConverter,
IBancorQuickConverter _Bancor,
IBancorGasPriceLimit _BancorGas) public onlyAdmin{
BancorConverter = _BancorConverter;
Bancor = _Bancor;
BancorGas = _BancorGas;
}
function updatePath(IERC20Token[] _path, IERC20Token[] _reversePath, uint8 _index) public onlyAdmin{
paths[_index] = _path;
reversePaths[_index] = _reversePath;
}
function changeBuyFlag(bool _flag) public onlyAdmin {
buyFlag = _flag;
}
function updateRate(uint256 _rate) public onlyAdmin {
rate = _rate;
}
function valueOnContract() public view returns (uint256){
ISmartToken smartToken;
IERC20Token toToken;
ITokenConverter converter;
IERC20Token[] memory _path;
uint256 pathLength;
uint256 sumUp;
uint256 _amount;
IERC20Token _fromToken;
for(uint8 j=0;j<8;j++){
_path = reversePaths[j];
// iterate over the conversion path
pathLength = _path.length;
_fromToken = _path[0];
_amount = _fromToken.balanceOf(address(this));
for (uint256 i = 1; i < pathLength; i += 2) {
smartToken = ISmartToken(_path[i]);
toToken = _path[i + 1];
converter = ITokenConverter(smartToken.owner());
// make the conversion - if it's the last one, also provide the minimum return value
_amount = converter.getReturn(_fromToken, toToken, _amount);
_fromToken = toToken;
}
sumUp += _amount;
}
return sumUp;
}
function buy() public payable {
BancorGas.validateGasPrice(tx.gasprice);
if(buyFlag == false){
tokenBuy = msg.value.mul(rate);
} else {
uint256 valueStored = valueOnContract();
uint256 tokenBuy;
if(totalSupply > valueStored){
uint256 tempRate = totalSupply.div(valueStored); // Must be > 0 Tok/Eth
tokenBuy = msg.value.mul(tempRate); // Eth * Tok / Eth = Tok
} else {
uint256 tempPrice = valueStored.div(totalSupply); // Must be > 0 Eth/Tok
tokenBuy = msg.value.div(tempPrice); // Eth / Eth / Tok = Tok
}
}
uint256 ethFee = msg.value.mul(5)/1000; //5/1000 => 0.5%
uint256 ethToInvest = msg.value.sub(ethFee);
feeWallet.transfer(ethFee);
invest(ethToInvest);
mintToken(msg.sender,tokenBuy);
}
function invest(uint256 _amount) private {
uint256 standarValue = _amount.div(8);
for(uint8 i=0; i<8; i++){
Bancor.convertForPrioritized.value(standarValue)(paths[i],standarValue,1,address(this),0,0,0,0x0,0x0);
}
}
function sell(address _target, uint256 _amount) private {
uint256 tempBalance;
uint256 tempFee;
uint256 dividedSupply = totalSupply.div(1e5); //ethereum is not decimals friendly
if(dividedSupply == 0 || _amount < dividedSupply) revert();
uint256 factor = _amount.div(dividedSupply);
if( factor == 0) revert();
tempBalance = EOSToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
EOSToken.transfer(feeWallet,tempFee);
EOSToken.transfer(_target,tempBalance);
tempBalance = ELFToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
ELFToken.transfer(feeWallet,tempFee);
ELFToken.transfer(_target,tempBalance);
tempBalance = OMGToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
OMGToken.transfer(feeWallet,tempFee);
OMGToken.transfer(_target,tempBalance);
tempBalance = POAToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POAToken.transfer(feeWallet,tempFee);
POAToken.transfer(_target,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
DRGNToken.transfer(feeWallet,tempFee);
DRGNToken.transfer(_target,tempBalance);
tempBalance = SRNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
SRNToken.transfer(feeWallet,tempFee);
SRNToken.transfer(_target,tempBalance);
tempBalance = WAXToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
WAXToken.transfer(feeWallet,tempFee);
WAXToken.transfer(_target,tempBalance);
tempBalance = POWRToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POWRToken.transfer(feeWallet,tempFee);
POWRToken.transfer(_target,tempBalance);
}
function emergency() onlyAdmin public{
uint256 tempBalance;
msg.sender.transfer(address(this).balance);
tempBalance = EOSToken.balanceOf(this);
EOSToken.transfer(admin,tempBalance);
tempBalance = ELFToken.balanceOf(this);
ELFToken.transfer(admin,tempBalance);
tempBalance = OMGToken.balanceOf(this);
OMGToken.transfer(admin,tempBalance);
tempBalance = POAToken.balanceOf(this);
POAToken.transfer(admin,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
DRGNToken.transfer(admin,tempBalance);
tempBalance = SRNToken.balanceOf(this);
SRNToken.transfer(admin,tempBalance);
tempBalance = WAXToken.balanceOf(this);
WAXToken.transfer(admin,tempBalance);
tempBalance = POWRToken.balanceOf(this);
POWRToken.transfer(admin,tempBalance);
}
function claimTokens(IERC20Token _address, address _to) onlyAdmin public {
require(_to != address(0));
uint256 remainder = _address.balanceOf(this); //Check remainder tokens
_address.transfer(_to,remainder); //Transfer tokens to creator
}
function () public payable{
buy();
}
} | /**
* @title ERC20Token
* @notice Token definition contract
*/ | NatSpecMultiLine | approve | function approve(address _spender, uint256 _value) public returns (bool success) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0)); //exploit mitigation
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
| /**
* @notice Assign allowance _value to _spender address to use the msg.sender balance
* @param _spender The address to be allowed to spend.
* @param _value The amount to be allowed.
* @return success with boolean value true
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
2642,
2952
]
} | 56,375 |
|
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | Solidity | MEGA | contract MEGA is admined,IERC20Token { //Standar definition of an ERC20Token
using SafeMath for uint256; //SafeMath is used for uint256 operations
///////////////////////////////////////////////////////////////////////////////////////
/// Token Related ///
///////////////////////////////////////////////////////////////////////////////////////
mapping (address => uint256) balances; //A mapping of all balances per address
mapping (address => mapping (address => uint256)) allowed; //A mapping of all allowances
uint256 public totalSupply;
/**
* @notice Get the balance of an _owner address.
* @param _owner The address to be query.
*/
function balanceOf(address _owner) public constant returns (uint256 bal) {
return balances[_owner];
}
/**
* @notice transfer _value tokens to address _to
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transfer(address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
if(_to == address(this)){
burnToken(msg.sender, _value);
sell(msg.sender,_value);
return true;
} else {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
}
/**
* @notice Transfer _value tokens from address _from to address _to using allowance msg.sender allowance on _from
* @param _from The address where tokens comes.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @notice Assign allowance _value to _spender address to use the msg.sender balance
* @param _spender The address to be allowed to spend.
* @param _value The amount to be allowed.
* @return success with boolean value true
*/
function approve(address _spender, uint256 _value) public returns (bool success) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0)); //exploit mitigation
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @notice Get the allowance of an specified address to use another address balance.
* @param _owner The address of the owner of the tokens.
* @param _spender The address of the allowed spender.
* @return remaining with the allowance value
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/**
* @dev Mint token to an specified address.
* @param _target The address of the receiver of the tokens.
* @param _mintedAmount amount to mint.
*/
function mintToken(address _target, uint256 _mintedAmount) private {
balances[_target] = SafeMath.add(balances[_target], _mintedAmount);
totalSupply = SafeMath.add(totalSupply, _mintedAmount);
emit Transfer(0, this, _mintedAmount);
emit Transfer(this, _target, _mintedAmount);
}
/**
* @dev Burn token of an specified address.
* @param _target The address of the holder of the tokens.
* @param _burnedAmount amount to burn.
*/
function burnToken(address _target, uint256 _burnedAmount) private {
balances[_target] = SafeMath.sub(balances[_target], _burnedAmount);
totalSupply = SafeMath.sub(totalSupply, _burnedAmount);
emit Burned(_target, _burnedAmount);
}
/**
* @dev Log Events
*/
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Burned(address indexed _target, uint256 _value);
///////////////////////////////////////////////////////////////////////////////////////
/// Investment related ///
///////////////////////////////////////////////////////////////////////////////////////
//Internal Variables
IBancorConverter BancorConverter = IBancorConverter(0xc6725aE749677f21E4d8f85F41cFB6DE49b9Db29);
IBancorQuickConverter Bancor = IBancorQuickConverter(0xcF1CC6eD5B653DeF7417E3fA93992c3FFe49139B);
IBancorGasPriceLimit BancorGas = IBancorGasPriceLimit(0x607a5C47978e2Eb6d59C6C6f51bc0bF411f4b85a);
IERC20Token ETHToken = IERC20Token(0xc0829421C1d260BD3cB3E0F06cfE2D52db2cE315);
IERC20Token BNTToken = IERC20Token(0x1F573D6Fb3F13d689FF844B4cE37794d79a7FF1C);
IERC20Token EOSRelay = IERC20Token(0x507b06c23d7Cb313194dBF6A6D80297137fb5E01);
IERC20Token EOSToken = IERC20Token(0x86Fa049857E0209aa7D9e616F7eb3b3B78ECfdb0);
IERC20Token ELFRelay = IERC20Token(0x0F2318565f1996CB1eD2F88e172135791BC1FcBf);
IERC20Token ELFToken = IERC20Token(0xbf2179859fc6D5BEE9Bf9158632Dc51678a4100e);
IERC20Token OMGRelay = IERC20Token(0x99eBD396Ce7AA095412a4Cd1A0C959D6Fd67B340);
IERC20Token OMGToken = IERC20Token(0xd26114cd6EE289AccF82350c8d8487fedB8A0C07);
IERC20Token POARelay = IERC20Token(0x564c07255AFe5050D82c8816F78dA13f2B17ac6D);
IERC20Token POAToken = IERC20Token(0x6758B7d441a9739b98552B373703d8d3d14f9e62);
IERC20Token DRGNRelay = IERC20Token(0xa7774F9386E1653645E1A08fb7Aae525B4DeDb24);
IERC20Token DRGNToken = IERC20Token(0x419c4dB4B9e25d6Db2AD9691ccb832C8D9fDA05E);
IERC20Token SRNRelay = IERC20Token(0xd2Deb679ed81238CaeF8E0c32257092cEcc8888b);
IERC20Token SRNToken = IERC20Token(0x68d57c9a1C35f63E2c83eE8e49A64e9d70528D25);
IERC20Token WAXRelay = IERC20Token(0x67563E7A0F13642068F6F999e48c690107A4571F);
IERC20Token WAXToken = IERC20Token(0x39Bb259F66E1C59d5ABEF88375979b4D20D98022);
IERC20Token POWRRelay = IERC20Token(0x168D7Bbf38E17941173a352f1352DF91a7771dF3);
IERC20Token POWRToken = IERC20Token(0x595832F8FC6BF59c85C527fEC3740A1b7a361269);
bool buyFlag = false; //False = set rate - True = auto rate
//Path to exchanges
mapping(uint8 => IERC20Token[]) paths;
mapping(uint8 => IERC20Token[]) reversePaths;
//public variables
address public feeWallet;
uint256 public rate = 6850;
//token related
string public name = "MEGAINVEST v4";
uint8 public decimals = 18;
string public symbol = "MEG4";
string public version = '2';
constructor(address _feeWallet) public {
feeWallet = _feeWallet;
paths[0] = [ETHToken,BNTToken,BNTToken,EOSRelay,EOSRelay,EOSRelay,EOSToken];
paths[1] = [ETHToken,BNTToken,BNTToken,ELFRelay,ELFRelay,ELFRelay,ELFToken];
paths[2] = [ETHToken,BNTToken,BNTToken,OMGRelay,OMGRelay,OMGRelay,OMGToken];
paths[3] = [ETHToken,BNTToken,BNTToken,POARelay,POARelay,POARelay,POAToken];
paths[4] = [ETHToken,BNTToken,BNTToken,DRGNRelay,DRGNRelay,DRGNRelay,DRGNToken];
paths[5] = [ETHToken,BNTToken,BNTToken,SRNRelay,SRNRelay,SRNRelay,SRNToken];
paths[6] = [ETHToken,BNTToken,BNTToken,WAXRelay,WAXRelay,WAXRelay,WAXToken];
paths[7] = [ETHToken,BNTToken,BNTToken,POWRRelay,POWRRelay,POWRRelay,POWRToken];
reversePaths[0] = [EOSToken,EOSRelay,EOSRelay,EOSRelay,BNTToken,BNTToken,ETHToken];
reversePaths[1] = [ELFToken,ELFRelay,ELFRelay,ELFRelay,BNTToken,BNTToken,ETHToken];
reversePaths[2] = [OMGToken,OMGRelay,OMGRelay,OMGRelay,BNTToken,BNTToken,ETHToken];
reversePaths[3] = [POAToken,POARelay,POARelay,POARelay,BNTToken,BNTToken,ETHToken];
reversePaths[4] = [DRGNToken,DRGNRelay,DRGNRelay,DRGNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[5] = [SRNToken,SRNRelay,SRNRelay,SRNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[6] = [WAXToken,WAXRelay,WAXRelay,WAXRelay,BNTToken,BNTToken,ETHToken];
reversePaths[7] = [POWRToken,POWRRelay,POWRRelay,POWRRelay,BNTToken,BNTToken,ETHToken];
}
function updateBancorContracts(
IBancorConverter _BancorConverter,
IBancorQuickConverter _Bancor,
IBancorGasPriceLimit _BancorGas) public onlyAdmin{
BancorConverter = _BancorConverter;
Bancor = _Bancor;
BancorGas = _BancorGas;
}
function updatePath(IERC20Token[] _path, IERC20Token[] _reversePath, uint8 _index) public onlyAdmin{
paths[_index] = _path;
reversePaths[_index] = _reversePath;
}
function changeBuyFlag(bool _flag) public onlyAdmin {
buyFlag = _flag;
}
function updateRate(uint256 _rate) public onlyAdmin {
rate = _rate;
}
function valueOnContract() public view returns (uint256){
ISmartToken smartToken;
IERC20Token toToken;
ITokenConverter converter;
IERC20Token[] memory _path;
uint256 pathLength;
uint256 sumUp;
uint256 _amount;
IERC20Token _fromToken;
for(uint8 j=0;j<8;j++){
_path = reversePaths[j];
// iterate over the conversion path
pathLength = _path.length;
_fromToken = _path[0];
_amount = _fromToken.balanceOf(address(this));
for (uint256 i = 1; i < pathLength; i += 2) {
smartToken = ISmartToken(_path[i]);
toToken = _path[i + 1];
converter = ITokenConverter(smartToken.owner());
// make the conversion - if it's the last one, also provide the minimum return value
_amount = converter.getReturn(_fromToken, toToken, _amount);
_fromToken = toToken;
}
sumUp += _amount;
}
return sumUp;
}
function buy() public payable {
BancorGas.validateGasPrice(tx.gasprice);
if(buyFlag == false){
tokenBuy = msg.value.mul(rate);
} else {
uint256 valueStored = valueOnContract();
uint256 tokenBuy;
if(totalSupply > valueStored){
uint256 tempRate = totalSupply.div(valueStored); // Must be > 0 Tok/Eth
tokenBuy = msg.value.mul(tempRate); // Eth * Tok / Eth = Tok
} else {
uint256 tempPrice = valueStored.div(totalSupply); // Must be > 0 Eth/Tok
tokenBuy = msg.value.div(tempPrice); // Eth / Eth / Tok = Tok
}
}
uint256 ethFee = msg.value.mul(5)/1000; //5/1000 => 0.5%
uint256 ethToInvest = msg.value.sub(ethFee);
feeWallet.transfer(ethFee);
invest(ethToInvest);
mintToken(msg.sender,tokenBuy);
}
function invest(uint256 _amount) private {
uint256 standarValue = _amount.div(8);
for(uint8 i=0; i<8; i++){
Bancor.convertForPrioritized.value(standarValue)(paths[i],standarValue,1,address(this),0,0,0,0x0,0x0);
}
}
function sell(address _target, uint256 _amount) private {
uint256 tempBalance;
uint256 tempFee;
uint256 dividedSupply = totalSupply.div(1e5); //ethereum is not decimals friendly
if(dividedSupply == 0 || _amount < dividedSupply) revert();
uint256 factor = _amount.div(dividedSupply);
if( factor == 0) revert();
tempBalance = EOSToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
EOSToken.transfer(feeWallet,tempFee);
EOSToken.transfer(_target,tempBalance);
tempBalance = ELFToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
ELFToken.transfer(feeWallet,tempFee);
ELFToken.transfer(_target,tempBalance);
tempBalance = OMGToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
OMGToken.transfer(feeWallet,tempFee);
OMGToken.transfer(_target,tempBalance);
tempBalance = POAToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POAToken.transfer(feeWallet,tempFee);
POAToken.transfer(_target,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
DRGNToken.transfer(feeWallet,tempFee);
DRGNToken.transfer(_target,tempBalance);
tempBalance = SRNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
SRNToken.transfer(feeWallet,tempFee);
SRNToken.transfer(_target,tempBalance);
tempBalance = WAXToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
WAXToken.transfer(feeWallet,tempFee);
WAXToken.transfer(_target,tempBalance);
tempBalance = POWRToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POWRToken.transfer(feeWallet,tempFee);
POWRToken.transfer(_target,tempBalance);
}
function emergency() onlyAdmin public{
uint256 tempBalance;
msg.sender.transfer(address(this).balance);
tempBalance = EOSToken.balanceOf(this);
EOSToken.transfer(admin,tempBalance);
tempBalance = ELFToken.balanceOf(this);
ELFToken.transfer(admin,tempBalance);
tempBalance = OMGToken.balanceOf(this);
OMGToken.transfer(admin,tempBalance);
tempBalance = POAToken.balanceOf(this);
POAToken.transfer(admin,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
DRGNToken.transfer(admin,tempBalance);
tempBalance = SRNToken.balanceOf(this);
SRNToken.transfer(admin,tempBalance);
tempBalance = WAXToken.balanceOf(this);
WAXToken.transfer(admin,tempBalance);
tempBalance = POWRToken.balanceOf(this);
POWRToken.transfer(admin,tempBalance);
}
function claimTokens(IERC20Token _address, address _to) onlyAdmin public {
require(_to != address(0));
uint256 remainder = _address.balanceOf(this); //Check remainder tokens
_address.transfer(_to,remainder); //Transfer tokens to creator
}
function () public payable{
buy();
}
} | /**
* @title ERC20Token
* @notice Token definition contract
*/ | NatSpecMultiLine | allowance | function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
| /**
* @notice Get the allowance of an specified address to use another address balance.
* @param _owner The address of the owner of the tokens.
* @param _spender The address of the allowed spender.
* @return remaining with the allowance value
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
3231,
3384
]
} | 56,376 |
|
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | Solidity | MEGA | contract MEGA is admined,IERC20Token { //Standar definition of an ERC20Token
using SafeMath for uint256; //SafeMath is used for uint256 operations
///////////////////////////////////////////////////////////////////////////////////////
/// Token Related ///
///////////////////////////////////////////////////////////////////////////////////////
mapping (address => uint256) balances; //A mapping of all balances per address
mapping (address => mapping (address => uint256)) allowed; //A mapping of all allowances
uint256 public totalSupply;
/**
* @notice Get the balance of an _owner address.
* @param _owner The address to be query.
*/
function balanceOf(address _owner) public constant returns (uint256 bal) {
return balances[_owner];
}
/**
* @notice transfer _value tokens to address _to
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transfer(address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
if(_to == address(this)){
burnToken(msg.sender, _value);
sell(msg.sender,_value);
return true;
} else {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
}
/**
* @notice Transfer _value tokens from address _from to address _to using allowance msg.sender allowance on _from
* @param _from The address where tokens comes.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @notice Assign allowance _value to _spender address to use the msg.sender balance
* @param _spender The address to be allowed to spend.
* @param _value The amount to be allowed.
* @return success with boolean value true
*/
function approve(address _spender, uint256 _value) public returns (bool success) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0)); //exploit mitigation
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @notice Get the allowance of an specified address to use another address balance.
* @param _owner The address of the owner of the tokens.
* @param _spender The address of the allowed spender.
* @return remaining with the allowance value
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/**
* @dev Mint token to an specified address.
* @param _target The address of the receiver of the tokens.
* @param _mintedAmount amount to mint.
*/
function mintToken(address _target, uint256 _mintedAmount) private {
balances[_target] = SafeMath.add(balances[_target], _mintedAmount);
totalSupply = SafeMath.add(totalSupply, _mintedAmount);
emit Transfer(0, this, _mintedAmount);
emit Transfer(this, _target, _mintedAmount);
}
/**
* @dev Burn token of an specified address.
* @param _target The address of the holder of the tokens.
* @param _burnedAmount amount to burn.
*/
function burnToken(address _target, uint256 _burnedAmount) private {
balances[_target] = SafeMath.sub(balances[_target], _burnedAmount);
totalSupply = SafeMath.sub(totalSupply, _burnedAmount);
emit Burned(_target, _burnedAmount);
}
/**
* @dev Log Events
*/
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Burned(address indexed _target, uint256 _value);
///////////////////////////////////////////////////////////////////////////////////////
/// Investment related ///
///////////////////////////////////////////////////////////////////////////////////////
//Internal Variables
IBancorConverter BancorConverter = IBancorConverter(0xc6725aE749677f21E4d8f85F41cFB6DE49b9Db29);
IBancorQuickConverter Bancor = IBancorQuickConverter(0xcF1CC6eD5B653DeF7417E3fA93992c3FFe49139B);
IBancorGasPriceLimit BancorGas = IBancorGasPriceLimit(0x607a5C47978e2Eb6d59C6C6f51bc0bF411f4b85a);
IERC20Token ETHToken = IERC20Token(0xc0829421C1d260BD3cB3E0F06cfE2D52db2cE315);
IERC20Token BNTToken = IERC20Token(0x1F573D6Fb3F13d689FF844B4cE37794d79a7FF1C);
IERC20Token EOSRelay = IERC20Token(0x507b06c23d7Cb313194dBF6A6D80297137fb5E01);
IERC20Token EOSToken = IERC20Token(0x86Fa049857E0209aa7D9e616F7eb3b3B78ECfdb0);
IERC20Token ELFRelay = IERC20Token(0x0F2318565f1996CB1eD2F88e172135791BC1FcBf);
IERC20Token ELFToken = IERC20Token(0xbf2179859fc6D5BEE9Bf9158632Dc51678a4100e);
IERC20Token OMGRelay = IERC20Token(0x99eBD396Ce7AA095412a4Cd1A0C959D6Fd67B340);
IERC20Token OMGToken = IERC20Token(0xd26114cd6EE289AccF82350c8d8487fedB8A0C07);
IERC20Token POARelay = IERC20Token(0x564c07255AFe5050D82c8816F78dA13f2B17ac6D);
IERC20Token POAToken = IERC20Token(0x6758B7d441a9739b98552B373703d8d3d14f9e62);
IERC20Token DRGNRelay = IERC20Token(0xa7774F9386E1653645E1A08fb7Aae525B4DeDb24);
IERC20Token DRGNToken = IERC20Token(0x419c4dB4B9e25d6Db2AD9691ccb832C8D9fDA05E);
IERC20Token SRNRelay = IERC20Token(0xd2Deb679ed81238CaeF8E0c32257092cEcc8888b);
IERC20Token SRNToken = IERC20Token(0x68d57c9a1C35f63E2c83eE8e49A64e9d70528D25);
IERC20Token WAXRelay = IERC20Token(0x67563E7A0F13642068F6F999e48c690107A4571F);
IERC20Token WAXToken = IERC20Token(0x39Bb259F66E1C59d5ABEF88375979b4D20D98022);
IERC20Token POWRRelay = IERC20Token(0x168D7Bbf38E17941173a352f1352DF91a7771dF3);
IERC20Token POWRToken = IERC20Token(0x595832F8FC6BF59c85C527fEC3740A1b7a361269);
bool buyFlag = false; //False = set rate - True = auto rate
//Path to exchanges
mapping(uint8 => IERC20Token[]) paths;
mapping(uint8 => IERC20Token[]) reversePaths;
//public variables
address public feeWallet;
uint256 public rate = 6850;
//token related
string public name = "MEGAINVEST v4";
uint8 public decimals = 18;
string public symbol = "MEG4";
string public version = '2';
constructor(address _feeWallet) public {
feeWallet = _feeWallet;
paths[0] = [ETHToken,BNTToken,BNTToken,EOSRelay,EOSRelay,EOSRelay,EOSToken];
paths[1] = [ETHToken,BNTToken,BNTToken,ELFRelay,ELFRelay,ELFRelay,ELFToken];
paths[2] = [ETHToken,BNTToken,BNTToken,OMGRelay,OMGRelay,OMGRelay,OMGToken];
paths[3] = [ETHToken,BNTToken,BNTToken,POARelay,POARelay,POARelay,POAToken];
paths[4] = [ETHToken,BNTToken,BNTToken,DRGNRelay,DRGNRelay,DRGNRelay,DRGNToken];
paths[5] = [ETHToken,BNTToken,BNTToken,SRNRelay,SRNRelay,SRNRelay,SRNToken];
paths[6] = [ETHToken,BNTToken,BNTToken,WAXRelay,WAXRelay,WAXRelay,WAXToken];
paths[7] = [ETHToken,BNTToken,BNTToken,POWRRelay,POWRRelay,POWRRelay,POWRToken];
reversePaths[0] = [EOSToken,EOSRelay,EOSRelay,EOSRelay,BNTToken,BNTToken,ETHToken];
reversePaths[1] = [ELFToken,ELFRelay,ELFRelay,ELFRelay,BNTToken,BNTToken,ETHToken];
reversePaths[2] = [OMGToken,OMGRelay,OMGRelay,OMGRelay,BNTToken,BNTToken,ETHToken];
reversePaths[3] = [POAToken,POARelay,POARelay,POARelay,BNTToken,BNTToken,ETHToken];
reversePaths[4] = [DRGNToken,DRGNRelay,DRGNRelay,DRGNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[5] = [SRNToken,SRNRelay,SRNRelay,SRNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[6] = [WAXToken,WAXRelay,WAXRelay,WAXRelay,BNTToken,BNTToken,ETHToken];
reversePaths[7] = [POWRToken,POWRRelay,POWRRelay,POWRRelay,BNTToken,BNTToken,ETHToken];
}
function updateBancorContracts(
IBancorConverter _BancorConverter,
IBancorQuickConverter _Bancor,
IBancorGasPriceLimit _BancorGas) public onlyAdmin{
BancorConverter = _BancorConverter;
Bancor = _Bancor;
BancorGas = _BancorGas;
}
function updatePath(IERC20Token[] _path, IERC20Token[] _reversePath, uint8 _index) public onlyAdmin{
paths[_index] = _path;
reversePaths[_index] = _reversePath;
}
function changeBuyFlag(bool _flag) public onlyAdmin {
buyFlag = _flag;
}
function updateRate(uint256 _rate) public onlyAdmin {
rate = _rate;
}
function valueOnContract() public view returns (uint256){
ISmartToken smartToken;
IERC20Token toToken;
ITokenConverter converter;
IERC20Token[] memory _path;
uint256 pathLength;
uint256 sumUp;
uint256 _amount;
IERC20Token _fromToken;
for(uint8 j=0;j<8;j++){
_path = reversePaths[j];
// iterate over the conversion path
pathLength = _path.length;
_fromToken = _path[0];
_amount = _fromToken.balanceOf(address(this));
for (uint256 i = 1; i < pathLength; i += 2) {
smartToken = ISmartToken(_path[i]);
toToken = _path[i + 1];
converter = ITokenConverter(smartToken.owner());
// make the conversion - if it's the last one, also provide the minimum return value
_amount = converter.getReturn(_fromToken, toToken, _amount);
_fromToken = toToken;
}
sumUp += _amount;
}
return sumUp;
}
function buy() public payable {
BancorGas.validateGasPrice(tx.gasprice);
if(buyFlag == false){
tokenBuy = msg.value.mul(rate);
} else {
uint256 valueStored = valueOnContract();
uint256 tokenBuy;
if(totalSupply > valueStored){
uint256 tempRate = totalSupply.div(valueStored); // Must be > 0 Tok/Eth
tokenBuy = msg.value.mul(tempRate); // Eth * Tok / Eth = Tok
} else {
uint256 tempPrice = valueStored.div(totalSupply); // Must be > 0 Eth/Tok
tokenBuy = msg.value.div(tempPrice); // Eth / Eth / Tok = Tok
}
}
uint256 ethFee = msg.value.mul(5)/1000; //5/1000 => 0.5%
uint256 ethToInvest = msg.value.sub(ethFee);
feeWallet.transfer(ethFee);
invest(ethToInvest);
mintToken(msg.sender,tokenBuy);
}
function invest(uint256 _amount) private {
uint256 standarValue = _amount.div(8);
for(uint8 i=0; i<8; i++){
Bancor.convertForPrioritized.value(standarValue)(paths[i],standarValue,1,address(this),0,0,0,0x0,0x0);
}
}
function sell(address _target, uint256 _amount) private {
uint256 tempBalance;
uint256 tempFee;
uint256 dividedSupply = totalSupply.div(1e5); //ethereum is not decimals friendly
if(dividedSupply == 0 || _amount < dividedSupply) revert();
uint256 factor = _amount.div(dividedSupply);
if( factor == 0) revert();
tempBalance = EOSToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
EOSToken.transfer(feeWallet,tempFee);
EOSToken.transfer(_target,tempBalance);
tempBalance = ELFToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
ELFToken.transfer(feeWallet,tempFee);
ELFToken.transfer(_target,tempBalance);
tempBalance = OMGToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
OMGToken.transfer(feeWallet,tempFee);
OMGToken.transfer(_target,tempBalance);
tempBalance = POAToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POAToken.transfer(feeWallet,tempFee);
POAToken.transfer(_target,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
DRGNToken.transfer(feeWallet,tempFee);
DRGNToken.transfer(_target,tempBalance);
tempBalance = SRNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
SRNToken.transfer(feeWallet,tempFee);
SRNToken.transfer(_target,tempBalance);
tempBalance = WAXToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
WAXToken.transfer(feeWallet,tempFee);
WAXToken.transfer(_target,tempBalance);
tempBalance = POWRToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POWRToken.transfer(feeWallet,tempFee);
POWRToken.transfer(_target,tempBalance);
}
function emergency() onlyAdmin public{
uint256 tempBalance;
msg.sender.transfer(address(this).balance);
tempBalance = EOSToken.balanceOf(this);
EOSToken.transfer(admin,tempBalance);
tempBalance = ELFToken.balanceOf(this);
ELFToken.transfer(admin,tempBalance);
tempBalance = OMGToken.balanceOf(this);
OMGToken.transfer(admin,tempBalance);
tempBalance = POAToken.balanceOf(this);
POAToken.transfer(admin,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
DRGNToken.transfer(admin,tempBalance);
tempBalance = SRNToken.balanceOf(this);
SRNToken.transfer(admin,tempBalance);
tempBalance = WAXToken.balanceOf(this);
WAXToken.transfer(admin,tempBalance);
tempBalance = POWRToken.balanceOf(this);
POWRToken.transfer(admin,tempBalance);
}
function claimTokens(IERC20Token _address, address _to) onlyAdmin public {
require(_to != address(0));
uint256 remainder = _address.balanceOf(this); //Check remainder tokens
_address.transfer(_to,remainder); //Transfer tokens to creator
}
function () public payable{
buy();
}
} | /**
* @title ERC20Token
* @notice Token definition contract
*/ | NatSpecMultiLine | mintToken | function mintToken(address _target, uint256 _mintedAmount) private {
balances[_target] = SafeMath.add(balances[_target], _mintedAmount);
totalSupply = SafeMath.add(totalSupply, _mintedAmount);
emit Transfer(0, this, _mintedAmount);
emit Transfer(this, _target, _mintedAmount);
}
| /**
* @dev Mint token to an specified address.
* @param _target The address of the receiver of the tokens.
* @param _mintedAmount amount to mint.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
3561,
3885
]
} | 56,377 |
|
MEGA | MEGA.sol | 0x8ea0469e13d6dd23fb163f428fb1cea9cd4294e8 | Solidity | MEGA | contract MEGA is admined,IERC20Token { //Standar definition of an ERC20Token
using SafeMath for uint256; //SafeMath is used for uint256 operations
///////////////////////////////////////////////////////////////////////////////////////
/// Token Related ///
///////////////////////////////////////////////////////////////////////////////////////
mapping (address => uint256) balances; //A mapping of all balances per address
mapping (address => mapping (address => uint256)) allowed; //A mapping of all allowances
uint256 public totalSupply;
/**
* @notice Get the balance of an _owner address.
* @param _owner The address to be query.
*/
function balanceOf(address _owner) public constant returns (uint256 bal) {
return balances[_owner];
}
/**
* @notice transfer _value tokens to address _to
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transfer(address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
if(_to == address(this)){
burnToken(msg.sender, _value);
sell(msg.sender,_value);
return true;
} else {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
}
/**
* @notice Transfer _value tokens from address _from to address _to using allowance msg.sender allowance on _from
* @param _from The address where tokens comes.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
* @return success with boolean value true if done
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @notice Assign allowance _value to _spender address to use the msg.sender balance
* @param _spender The address to be allowed to spend.
* @param _value The amount to be allowed.
* @return success with boolean value true
*/
function approve(address _spender, uint256 _value) public returns (bool success) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0)); //exploit mitigation
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @notice Get the allowance of an specified address to use another address balance.
* @param _owner The address of the owner of the tokens.
* @param _spender The address of the allowed spender.
* @return remaining with the allowance value
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/**
* @dev Mint token to an specified address.
* @param _target The address of the receiver of the tokens.
* @param _mintedAmount amount to mint.
*/
function mintToken(address _target, uint256 _mintedAmount) private {
balances[_target] = SafeMath.add(balances[_target], _mintedAmount);
totalSupply = SafeMath.add(totalSupply, _mintedAmount);
emit Transfer(0, this, _mintedAmount);
emit Transfer(this, _target, _mintedAmount);
}
/**
* @dev Burn token of an specified address.
* @param _target The address of the holder of the tokens.
* @param _burnedAmount amount to burn.
*/
function burnToken(address _target, uint256 _burnedAmount) private {
balances[_target] = SafeMath.sub(balances[_target], _burnedAmount);
totalSupply = SafeMath.sub(totalSupply, _burnedAmount);
emit Burned(_target, _burnedAmount);
}
/**
* @dev Log Events
*/
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Burned(address indexed _target, uint256 _value);
///////////////////////////////////////////////////////////////////////////////////////
/// Investment related ///
///////////////////////////////////////////////////////////////////////////////////////
//Internal Variables
IBancorConverter BancorConverter = IBancorConverter(0xc6725aE749677f21E4d8f85F41cFB6DE49b9Db29);
IBancorQuickConverter Bancor = IBancorQuickConverter(0xcF1CC6eD5B653DeF7417E3fA93992c3FFe49139B);
IBancorGasPriceLimit BancorGas = IBancorGasPriceLimit(0x607a5C47978e2Eb6d59C6C6f51bc0bF411f4b85a);
IERC20Token ETHToken = IERC20Token(0xc0829421C1d260BD3cB3E0F06cfE2D52db2cE315);
IERC20Token BNTToken = IERC20Token(0x1F573D6Fb3F13d689FF844B4cE37794d79a7FF1C);
IERC20Token EOSRelay = IERC20Token(0x507b06c23d7Cb313194dBF6A6D80297137fb5E01);
IERC20Token EOSToken = IERC20Token(0x86Fa049857E0209aa7D9e616F7eb3b3B78ECfdb0);
IERC20Token ELFRelay = IERC20Token(0x0F2318565f1996CB1eD2F88e172135791BC1FcBf);
IERC20Token ELFToken = IERC20Token(0xbf2179859fc6D5BEE9Bf9158632Dc51678a4100e);
IERC20Token OMGRelay = IERC20Token(0x99eBD396Ce7AA095412a4Cd1A0C959D6Fd67B340);
IERC20Token OMGToken = IERC20Token(0xd26114cd6EE289AccF82350c8d8487fedB8A0C07);
IERC20Token POARelay = IERC20Token(0x564c07255AFe5050D82c8816F78dA13f2B17ac6D);
IERC20Token POAToken = IERC20Token(0x6758B7d441a9739b98552B373703d8d3d14f9e62);
IERC20Token DRGNRelay = IERC20Token(0xa7774F9386E1653645E1A08fb7Aae525B4DeDb24);
IERC20Token DRGNToken = IERC20Token(0x419c4dB4B9e25d6Db2AD9691ccb832C8D9fDA05E);
IERC20Token SRNRelay = IERC20Token(0xd2Deb679ed81238CaeF8E0c32257092cEcc8888b);
IERC20Token SRNToken = IERC20Token(0x68d57c9a1C35f63E2c83eE8e49A64e9d70528D25);
IERC20Token WAXRelay = IERC20Token(0x67563E7A0F13642068F6F999e48c690107A4571F);
IERC20Token WAXToken = IERC20Token(0x39Bb259F66E1C59d5ABEF88375979b4D20D98022);
IERC20Token POWRRelay = IERC20Token(0x168D7Bbf38E17941173a352f1352DF91a7771dF3);
IERC20Token POWRToken = IERC20Token(0x595832F8FC6BF59c85C527fEC3740A1b7a361269);
bool buyFlag = false; //False = set rate - True = auto rate
//Path to exchanges
mapping(uint8 => IERC20Token[]) paths;
mapping(uint8 => IERC20Token[]) reversePaths;
//public variables
address public feeWallet;
uint256 public rate = 6850;
//token related
string public name = "MEGAINVEST v4";
uint8 public decimals = 18;
string public symbol = "MEG4";
string public version = '2';
constructor(address _feeWallet) public {
feeWallet = _feeWallet;
paths[0] = [ETHToken,BNTToken,BNTToken,EOSRelay,EOSRelay,EOSRelay,EOSToken];
paths[1] = [ETHToken,BNTToken,BNTToken,ELFRelay,ELFRelay,ELFRelay,ELFToken];
paths[2] = [ETHToken,BNTToken,BNTToken,OMGRelay,OMGRelay,OMGRelay,OMGToken];
paths[3] = [ETHToken,BNTToken,BNTToken,POARelay,POARelay,POARelay,POAToken];
paths[4] = [ETHToken,BNTToken,BNTToken,DRGNRelay,DRGNRelay,DRGNRelay,DRGNToken];
paths[5] = [ETHToken,BNTToken,BNTToken,SRNRelay,SRNRelay,SRNRelay,SRNToken];
paths[6] = [ETHToken,BNTToken,BNTToken,WAXRelay,WAXRelay,WAXRelay,WAXToken];
paths[7] = [ETHToken,BNTToken,BNTToken,POWRRelay,POWRRelay,POWRRelay,POWRToken];
reversePaths[0] = [EOSToken,EOSRelay,EOSRelay,EOSRelay,BNTToken,BNTToken,ETHToken];
reversePaths[1] = [ELFToken,ELFRelay,ELFRelay,ELFRelay,BNTToken,BNTToken,ETHToken];
reversePaths[2] = [OMGToken,OMGRelay,OMGRelay,OMGRelay,BNTToken,BNTToken,ETHToken];
reversePaths[3] = [POAToken,POARelay,POARelay,POARelay,BNTToken,BNTToken,ETHToken];
reversePaths[4] = [DRGNToken,DRGNRelay,DRGNRelay,DRGNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[5] = [SRNToken,SRNRelay,SRNRelay,SRNRelay,BNTToken,BNTToken,ETHToken];
reversePaths[6] = [WAXToken,WAXRelay,WAXRelay,WAXRelay,BNTToken,BNTToken,ETHToken];
reversePaths[7] = [POWRToken,POWRRelay,POWRRelay,POWRRelay,BNTToken,BNTToken,ETHToken];
}
function updateBancorContracts(
IBancorConverter _BancorConverter,
IBancorQuickConverter _Bancor,
IBancorGasPriceLimit _BancorGas) public onlyAdmin{
BancorConverter = _BancorConverter;
Bancor = _Bancor;
BancorGas = _BancorGas;
}
function updatePath(IERC20Token[] _path, IERC20Token[] _reversePath, uint8 _index) public onlyAdmin{
paths[_index] = _path;
reversePaths[_index] = _reversePath;
}
function changeBuyFlag(bool _flag) public onlyAdmin {
buyFlag = _flag;
}
function updateRate(uint256 _rate) public onlyAdmin {
rate = _rate;
}
function valueOnContract() public view returns (uint256){
ISmartToken smartToken;
IERC20Token toToken;
ITokenConverter converter;
IERC20Token[] memory _path;
uint256 pathLength;
uint256 sumUp;
uint256 _amount;
IERC20Token _fromToken;
for(uint8 j=0;j<8;j++){
_path = reversePaths[j];
// iterate over the conversion path
pathLength = _path.length;
_fromToken = _path[0];
_amount = _fromToken.balanceOf(address(this));
for (uint256 i = 1; i < pathLength; i += 2) {
smartToken = ISmartToken(_path[i]);
toToken = _path[i + 1];
converter = ITokenConverter(smartToken.owner());
// make the conversion - if it's the last one, also provide the minimum return value
_amount = converter.getReturn(_fromToken, toToken, _amount);
_fromToken = toToken;
}
sumUp += _amount;
}
return sumUp;
}
function buy() public payable {
BancorGas.validateGasPrice(tx.gasprice);
if(buyFlag == false){
tokenBuy = msg.value.mul(rate);
} else {
uint256 valueStored = valueOnContract();
uint256 tokenBuy;
if(totalSupply > valueStored){
uint256 tempRate = totalSupply.div(valueStored); // Must be > 0 Tok/Eth
tokenBuy = msg.value.mul(tempRate); // Eth * Tok / Eth = Tok
} else {
uint256 tempPrice = valueStored.div(totalSupply); // Must be > 0 Eth/Tok
tokenBuy = msg.value.div(tempPrice); // Eth / Eth / Tok = Tok
}
}
uint256 ethFee = msg.value.mul(5)/1000; //5/1000 => 0.5%
uint256 ethToInvest = msg.value.sub(ethFee);
feeWallet.transfer(ethFee);
invest(ethToInvest);
mintToken(msg.sender,tokenBuy);
}
function invest(uint256 _amount) private {
uint256 standarValue = _amount.div(8);
for(uint8 i=0; i<8; i++){
Bancor.convertForPrioritized.value(standarValue)(paths[i],standarValue,1,address(this),0,0,0,0x0,0x0);
}
}
function sell(address _target, uint256 _amount) private {
uint256 tempBalance;
uint256 tempFee;
uint256 dividedSupply = totalSupply.div(1e5); //ethereum is not decimals friendly
if(dividedSupply == 0 || _amount < dividedSupply) revert();
uint256 factor = _amount.div(dividedSupply);
if( factor == 0) revert();
tempBalance = EOSToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
EOSToken.transfer(feeWallet,tempFee);
EOSToken.transfer(_target,tempBalance);
tempBalance = ELFToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
ELFToken.transfer(feeWallet,tempFee);
ELFToken.transfer(_target,tempBalance);
tempBalance = OMGToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
OMGToken.transfer(feeWallet,tempFee);
OMGToken.transfer(_target,tempBalance);
tempBalance = POAToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POAToken.transfer(feeWallet,tempFee);
POAToken.transfer(_target,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
DRGNToken.transfer(feeWallet,tempFee);
DRGNToken.transfer(_target,tempBalance);
tempBalance = SRNToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
SRNToken.transfer(feeWallet,tempFee);
SRNToken.transfer(_target,tempBalance);
tempBalance = WAXToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
WAXToken.transfer(feeWallet,tempFee);
WAXToken.transfer(_target,tempBalance);
tempBalance = POWRToken.balanceOf(this);
tempFee = tempBalance.mul(5);
tempFee = tempFee.div(1000); //0.5%
tempBalance = tempBalance.sub(tempFee);
POWRToken.transfer(feeWallet,tempFee);
POWRToken.transfer(_target,tempBalance);
}
function emergency() onlyAdmin public{
uint256 tempBalance;
msg.sender.transfer(address(this).balance);
tempBalance = EOSToken.balanceOf(this);
EOSToken.transfer(admin,tempBalance);
tempBalance = ELFToken.balanceOf(this);
ELFToken.transfer(admin,tempBalance);
tempBalance = OMGToken.balanceOf(this);
OMGToken.transfer(admin,tempBalance);
tempBalance = POAToken.balanceOf(this);
POAToken.transfer(admin,tempBalance);
tempBalance = DRGNToken.balanceOf(this);
DRGNToken.transfer(admin,tempBalance);
tempBalance = SRNToken.balanceOf(this);
SRNToken.transfer(admin,tempBalance);
tempBalance = WAXToken.balanceOf(this);
WAXToken.transfer(admin,tempBalance);
tempBalance = POWRToken.balanceOf(this);
POWRToken.transfer(admin,tempBalance);
}
function claimTokens(IERC20Token _address, address _to) onlyAdmin public {
require(_to != address(0));
uint256 remainder = _address.balanceOf(this); //Check remainder tokens
_address.transfer(_to,remainder); //Transfer tokens to creator
}
function () public payable{
buy();
}
} | /**
* @title ERC20Token
* @notice Token definition contract
*/ | NatSpecMultiLine | burnToken | function burnToken(address _target, uint256 _burnedAmount) private {
balances[_target] = SafeMath.sub(balances[_target], _burnedAmount);
totalSupply = SafeMath.sub(totalSupply, _burnedAmount);
emit Burned(_target, _burnedAmount);
}
| /**
* @dev Burn token of an specified address.
* @param _target The address of the holder of the tokens.
* @param _burnedAmount amount to burn.
*/ | NatSpecMultiLine | v0.4.23+commit.124ca40d | bzzr://6c8b72b1f7e90d45f027dac77afc5dd0de48f4cd601c2c5235d1f328da73c1f0 | {
"func_code_index": [
4060,
4328
]
} | 56,378 |
|
BlankFaceHaylos | BlankFaceHaylosCollab.sol | 0xc4e27c3f0706945932adee2b1d5ce118b70f3fe2 | Solidity | BlankFaceHaylos | contract BlankFaceHaylos is ERC721Enumerable, Ownable, Functions, Metadata {
using Strings for uint256;
BLANKFACE private blankface;
uint256 public constant COLLECTION1_MAX = 10000;
uint256 public constant COLLECTION2_MAX = 10000;
uint256 public constant COLLECTION3_MAX = 10000;
uint256 public constant NFT_MAX = COLLECTION1_MAX + COLLECTION2_MAX + COLLECTION3_MAX;
uint256 public constant PURCHASE_LIMIT = 3;
uint256 public constant PRICE = 0.01 ether;
uint256 public constant mint3loop = 1;
bool public isCollection1Active = false;
bool public isCollection2Active = false;
bool public isCollection3Active = false;
bool public isMasterActive = false;
string public message;
uint256 public Collection1MaxMint = 1;
uint256 public Collection2MaxMint = 1;
uint256 public Collection3MaxMint = 1;
/// @dev We will use these to be able to calculate remaining correctly.
uint256 public totalCollection1Supply;
uint256 public totalCollection2Supply;
uint256 public totalCollection3Supply;
mapping(address => bool) private _Collection1;
mapping(address => uint256) private _Collection1Claimed;
mapping(address => bool) private _Collection2;
mapping(address => uint256) private _Collection2Claimed;
mapping(address => bool) private _Collection3;
mapping(address => uint256) private _Collection3Claimed;
string private _contractURI = '';
string private _tokenBaseURI = '';
string private _tokenRevealedBaseURI = '';
constructor(string memory name, string memory symbol, address dependentContractAddress) ERC721(name, symbol) {
blankface = BLANKFACE(dependentContractAddress);
}
//Collection1
function addToCollection1(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection1[addresses[i]] = true;
_Collection1Claimed[addresses[i]] > 0 ? _Collection1Claimed[addresses[i]] : 0;
}
}
function onCollection1(address addr) external view override returns (bool) {
return _Collection1[addr];
}
function removeFromCollection1(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection1[addresses[i]] = false;
}
}
function Collection1ClaimedBy(address owner) external view override returns (uint256){
require(owner != address(0), 'Zero address');
return _Collection1Claimed[owner];
}
//Collection2
function addToCollection2(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection2[addresses[i]] = true;
_Collection2Claimed[addresses[i]] > 0 ? _Collection2Claimed[addresses[i]] : 0;
}
}
function onCollection2(address addr) external view override returns (bool) {
return _Collection2[addr];
}
function removeFromCollection2(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection2[addresses[i]] = false;
}
}
function Collection2ClaimedBy(address owner) external view override returns (uint256){
require(owner != address(0), 'Zero address');
return _Collection2Claimed[owner];
}
//Collection3
function addToCollection3(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection3[addresses[i]] = true;
_Collection3Claimed[addresses[i]] > 0 ? _Collection3Claimed[addresses[i]] : 0;
}
}
function onCollection3(address addr) external view override returns (bool) {
return _Collection3[addr];
}
function removeFromCollection3(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection3[addresses[i]] = false;
}
}
function Collection3ClaimedBy(address owner) external view override returns (uint256){
require(owner != address(0), 'Zero address');
return _Collection3Claimed[owner];
}
function mintCollection1(uint256 numberOfTokens) external override payable {
uint balance = blankface.balanceOf(msg.sender);
if (balance>0) {
require(balance > 0, "Must hold at least BlankFace");
require(isMasterActive, 'Contract is not active');
require(isCollection1Active, 'Collection is not active');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection1MaxMint, 'Cannot purchase this many tokens');
require(totalCollection1Supply + numberOfTokens <= COLLECTION1_MAX, 'Purchase would exceed max supply');
require(_Collection1Claimed[msg.sender] + numberOfTokens <= Collection1MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = totalCollection1Supply + 1;
totalCollection1Supply += 1;
_Collection1Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
if (balance == 0) {
require(isMasterActive, 'Contract is not active');
require(isCollection1Active, 'Collection is not active');
require(_Collection1[msg.sender], 'Must be on Haylos Whitelist');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection2MaxMint, 'Cannot purchase this many tokens');
require(totalCollection1Supply + numberOfTokens <= COLLECTION1_MAX, 'Purchase would exceed max supply');
require(_Collection1Claimed[msg.sender] + numberOfTokens <= Collection1MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = totalCollection1Supply + 1;
totalCollection1Supply += 1;
_Collection1Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
}
function mintCollection2(uint256 numberOfTokens) external override payable {
uint balance = blankface.balanceOf(msg.sender);
if (balance>0) {
require(balance > 0, "Must hold at least BlankFace");
require(isMasterActive, 'Contract is not active');
require(isCollection2Active, 'Collection is not active');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection2MaxMint, 'Cannot purchase this many tokens');
require(totalCollection2Supply + numberOfTokens <= COLLECTION2_MAX, 'Purchase would exceed max supply');
require(_Collection2Claimed[msg.sender] + numberOfTokens <= Collection2MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = COLLECTION1_MAX + totalCollection2Supply + 1;
totalCollection2Supply += 1;
_Collection2Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
if (balance == 0) {
require(isMasterActive, 'Contract is not active');
require(isCollection2Active, 'Collection is not active');
require(_Collection2[msg.sender], 'Must be on Haylos Whitelist');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection2MaxMint, 'Cannot purchase this many tokens');
require(totalCollection2Supply + numberOfTokens <= COLLECTION2_MAX, 'Purchase would exceed max supply');
require(_Collection2Claimed[msg.sender] + numberOfTokens <= Collection2MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = COLLECTION1_MAX + totalCollection2Supply + 1;
totalCollection2Supply += 1;
_Collection2Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
}
function mintCollection3(uint256 numberOfTokens) external override payable {
uint balance = blankface.balanceOf(msg.sender);
if (balance>0) {
require(balance > 0, "Must hold at least BlankFace");
require(isMasterActive, 'Contract is not active');
require(isCollection3Active, 'Collection is not active');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection3MaxMint, 'Cannot purchase this many tokens');
require(totalCollection3Supply + numberOfTokens <= COLLECTION3_MAX, 'Purchase would exceed max supply');
require(_Collection3Claimed[msg.sender] + numberOfTokens <= Collection3MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = COLLECTION1_MAX + COLLECTION2_MAX + totalCollection1Supply + 1;
totalCollection3Supply += 1;
_Collection3Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
if (balance == 0) {
require(isMasterActive, 'Contract is not active');
require(isCollection3Active, 'Collection is not active');
require(_Collection3[msg.sender], 'Must be on Haylos Whitelist');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection3MaxMint, 'Cannot purchase this many tokens');
require(totalCollection3Supply + numberOfTokens <= COLLECTION3_MAX, 'Purchase would exceed max supply');
require(_Collection3Claimed[msg.sender] + numberOfTokens <= Collection3MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = COLLECTION1_MAX + COLLECTION2_MAX + totalCollection3Supply + 1;
totalCollection3Supply += 1;
_Collection3Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
}
function mintall3(uint256 numberOfTokens) external override payable {
uint balance = blankface.balanceOf(msg.sender);
if (balance>0) {
require(isMasterActive, 'Contract is not active');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= PURCHASE_LIMIT, 'Cannot purchase this many tokens');
require(_Collection1Claimed[msg.sender] + _Collection2Claimed[msg.sender] + _Collection3Claimed[msg.sender] + numberOfTokens <= PURCHASE_LIMIT, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < mint3loop; i++) {
uint256 tokenId1 = totalCollection1Supply + 1;
uint256 tokenId2 = COLLECTION1_MAX + totalCollection2Supply + 1;
uint256 tokenId3 = COLLECTION1_MAX + COLLECTION2_MAX + totalCollection3Supply + 1;
require(_Collection1Claimed[msg.sender] + _Collection2Claimed[msg.sender] + _Collection3Claimed[msg.sender] + numberOfTokens <= PURCHASE_LIMIT, 'Purchase exceeds max allowed');
totalCollection1Supply += 1;
_Collection1Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId1);
totalCollection2Supply += 1;
_Collection2Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId2);
totalCollection3Supply += 1;
_Collection3Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId3);
}
}
if (balance == 0) {
require(isMasterActive, 'Contract is not active');
require(_Collection1[msg.sender]);
require(_Collection2[msg.sender]);
require(_Collection3[msg.sender]);
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= PURCHASE_LIMIT, 'Cannot purchase this many tokens');
require(_Collection1Claimed[msg.sender] + _Collection2Claimed[msg.sender] + _Collection3Claimed[msg.sender] + numberOfTokens <= PURCHASE_LIMIT, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < mint3loop; i++) {
uint256 tokenId1 = totalCollection1Supply + 1;
uint256 tokenId2 = COLLECTION1_MAX + totalCollection2Supply + 1;
uint256 tokenId3 = COLLECTION1_MAX + COLLECTION2_MAX + totalCollection3Supply + 1;
require(_Collection1Claimed[msg.sender] + _Collection2Claimed[msg.sender] + _Collection3Claimed[msg.sender] + numberOfTokens <= PURCHASE_LIMIT, 'Purchase exceeds max allowed');
totalCollection1Supply += 1;
_Collection1Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId1);
totalCollection2Supply += 1;
_Collection2Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId2);
totalCollection3Supply += 1;
_Collection3Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId3);
}
}
}
function MasterActive(bool _isMasterActive) external override onlyOwner {
isMasterActive = _isMasterActive;
}
function Collection1Active(bool _isCollection1Active) external override onlyOwner {
isCollection1Active = _isCollection1Active;
}
function Collection2Active(bool _isCollection2Active) external override onlyOwner {
isCollection2Active = _isCollection2Active;
}
function Collection3Active(bool _isCollection3Active) external override onlyOwner {
isCollection3Active = _isCollection3Active;
}
function setMessage(string calldata messageString) external override onlyOwner {
message = messageString;
}
function withdraw() external override onlyOwner {
uint256 balance = address(this).balance;
payable(msg.sender).transfer(balance);
}
function setContractURI(string calldata URI) external override onlyOwner {
_contractURI = URI;
}
function setBaseURI(string calldata URI) external override onlyOwner {
_tokenBaseURI = URI;
}
function setRevealedBaseURI(string calldata revealedBaseURI) external override onlyOwner {
_tokenRevealedBaseURI = revealedBaseURI;
}
function contractURI() public view override returns (string memory) {
return _contractURI;
}
function tokenURI(uint256 tokenId) public view override(ERC721) returns (string memory) {
require(_exists(tokenId), 'Token does not exist');
/// @dev Convert string to bytes so we can check if it's empty or not.
string memory revealedBaseURI = _tokenRevealedBaseURI;
return bytes(revealedBaseURI).length > 0 ?
string(abi.encodePacked(revealedBaseURI, tokenId.toString())) :
_tokenBaseURI;
}
} | addToCollection1 | function addToCollection1(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection1[addresses[i]] = true;
_Collection1Claimed[addresses[i]] > 0 ? _Collection1Claimed[addresses[i]] : 0;
}
}
| //Collection1 | LineComment | v0.8.7+commit.e28d00a7 | None | ipfs://088568d4a6e2414908455c2680a5059e53403e6d0bc2886325281f7c5ffd2d5b | {
"func_code_index": [
1726,
2082
]
} | 56,379 |
||
BlankFaceHaylos | BlankFaceHaylosCollab.sol | 0xc4e27c3f0706945932adee2b1d5ce118b70f3fe2 | Solidity | BlankFaceHaylos | contract BlankFaceHaylos is ERC721Enumerable, Ownable, Functions, Metadata {
using Strings for uint256;
BLANKFACE private blankface;
uint256 public constant COLLECTION1_MAX = 10000;
uint256 public constant COLLECTION2_MAX = 10000;
uint256 public constant COLLECTION3_MAX = 10000;
uint256 public constant NFT_MAX = COLLECTION1_MAX + COLLECTION2_MAX + COLLECTION3_MAX;
uint256 public constant PURCHASE_LIMIT = 3;
uint256 public constant PRICE = 0.01 ether;
uint256 public constant mint3loop = 1;
bool public isCollection1Active = false;
bool public isCollection2Active = false;
bool public isCollection3Active = false;
bool public isMasterActive = false;
string public message;
uint256 public Collection1MaxMint = 1;
uint256 public Collection2MaxMint = 1;
uint256 public Collection3MaxMint = 1;
/// @dev We will use these to be able to calculate remaining correctly.
uint256 public totalCollection1Supply;
uint256 public totalCollection2Supply;
uint256 public totalCollection3Supply;
mapping(address => bool) private _Collection1;
mapping(address => uint256) private _Collection1Claimed;
mapping(address => bool) private _Collection2;
mapping(address => uint256) private _Collection2Claimed;
mapping(address => bool) private _Collection3;
mapping(address => uint256) private _Collection3Claimed;
string private _contractURI = '';
string private _tokenBaseURI = '';
string private _tokenRevealedBaseURI = '';
constructor(string memory name, string memory symbol, address dependentContractAddress) ERC721(name, symbol) {
blankface = BLANKFACE(dependentContractAddress);
}
//Collection1
function addToCollection1(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection1[addresses[i]] = true;
_Collection1Claimed[addresses[i]] > 0 ? _Collection1Claimed[addresses[i]] : 0;
}
}
function onCollection1(address addr) external view override returns (bool) {
return _Collection1[addr];
}
function removeFromCollection1(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection1[addresses[i]] = false;
}
}
function Collection1ClaimedBy(address owner) external view override returns (uint256){
require(owner != address(0), 'Zero address');
return _Collection1Claimed[owner];
}
//Collection2
function addToCollection2(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection2[addresses[i]] = true;
_Collection2Claimed[addresses[i]] > 0 ? _Collection2Claimed[addresses[i]] : 0;
}
}
function onCollection2(address addr) external view override returns (bool) {
return _Collection2[addr];
}
function removeFromCollection2(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection2[addresses[i]] = false;
}
}
function Collection2ClaimedBy(address owner) external view override returns (uint256){
require(owner != address(0), 'Zero address');
return _Collection2Claimed[owner];
}
//Collection3
function addToCollection3(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection3[addresses[i]] = true;
_Collection3Claimed[addresses[i]] > 0 ? _Collection3Claimed[addresses[i]] : 0;
}
}
function onCollection3(address addr) external view override returns (bool) {
return _Collection3[addr];
}
function removeFromCollection3(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection3[addresses[i]] = false;
}
}
function Collection3ClaimedBy(address owner) external view override returns (uint256){
require(owner != address(0), 'Zero address');
return _Collection3Claimed[owner];
}
function mintCollection1(uint256 numberOfTokens) external override payable {
uint balance = blankface.balanceOf(msg.sender);
if (balance>0) {
require(balance > 0, "Must hold at least BlankFace");
require(isMasterActive, 'Contract is not active');
require(isCollection1Active, 'Collection is not active');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection1MaxMint, 'Cannot purchase this many tokens');
require(totalCollection1Supply + numberOfTokens <= COLLECTION1_MAX, 'Purchase would exceed max supply');
require(_Collection1Claimed[msg.sender] + numberOfTokens <= Collection1MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = totalCollection1Supply + 1;
totalCollection1Supply += 1;
_Collection1Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
if (balance == 0) {
require(isMasterActive, 'Contract is not active');
require(isCollection1Active, 'Collection is not active');
require(_Collection1[msg.sender], 'Must be on Haylos Whitelist');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection2MaxMint, 'Cannot purchase this many tokens');
require(totalCollection1Supply + numberOfTokens <= COLLECTION1_MAX, 'Purchase would exceed max supply');
require(_Collection1Claimed[msg.sender] + numberOfTokens <= Collection1MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = totalCollection1Supply + 1;
totalCollection1Supply += 1;
_Collection1Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
}
function mintCollection2(uint256 numberOfTokens) external override payable {
uint balance = blankface.balanceOf(msg.sender);
if (balance>0) {
require(balance > 0, "Must hold at least BlankFace");
require(isMasterActive, 'Contract is not active');
require(isCollection2Active, 'Collection is not active');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection2MaxMint, 'Cannot purchase this many tokens');
require(totalCollection2Supply + numberOfTokens <= COLLECTION2_MAX, 'Purchase would exceed max supply');
require(_Collection2Claimed[msg.sender] + numberOfTokens <= Collection2MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = COLLECTION1_MAX + totalCollection2Supply + 1;
totalCollection2Supply += 1;
_Collection2Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
if (balance == 0) {
require(isMasterActive, 'Contract is not active');
require(isCollection2Active, 'Collection is not active');
require(_Collection2[msg.sender], 'Must be on Haylos Whitelist');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection2MaxMint, 'Cannot purchase this many tokens');
require(totalCollection2Supply + numberOfTokens <= COLLECTION2_MAX, 'Purchase would exceed max supply');
require(_Collection2Claimed[msg.sender] + numberOfTokens <= Collection2MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = COLLECTION1_MAX + totalCollection2Supply + 1;
totalCollection2Supply += 1;
_Collection2Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
}
function mintCollection3(uint256 numberOfTokens) external override payable {
uint balance = blankface.balanceOf(msg.sender);
if (balance>0) {
require(balance > 0, "Must hold at least BlankFace");
require(isMasterActive, 'Contract is not active');
require(isCollection3Active, 'Collection is not active');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection3MaxMint, 'Cannot purchase this many tokens');
require(totalCollection3Supply + numberOfTokens <= COLLECTION3_MAX, 'Purchase would exceed max supply');
require(_Collection3Claimed[msg.sender] + numberOfTokens <= Collection3MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = COLLECTION1_MAX + COLLECTION2_MAX + totalCollection1Supply + 1;
totalCollection3Supply += 1;
_Collection3Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
if (balance == 0) {
require(isMasterActive, 'Contract is not active');
require(isCollection3Active, 'Collection is not active');
require(_Collection3[msg.sender], 'Must be on Haylos Whitelist');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection3MaxMint, 'Cannot purchase this many tokens');
require(totalCollection3Supply + numberOfTokens <= COLLECTION3_MAX, 'Purchase would exceed max supply');
require(_Collection3Claimed[msg.sender] + numberOfTokens <= Collection3MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = COLLECTION1_MAX + COLLECTION2_MAX + totalCollection3Supply + 1;
totalCollection3Supply += 1;
_Collection3Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
}
function mintall3(uint256 numberOfTokens) external override payable {
uint balance = blankface.balanceOf(msg.sender);
if (balance>0) {
require(isMasterActive, 'Contract is not active');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= PURCHASE_LIMIT, 'Cannot purchase this many tokens');
require(_Collection1Claimed[msg.sender] + _Collection2Claimed[msg.sender] + _Collection3Claimed[msg.sender] + numberOfTokens <= PURCHASE_LIMIT, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < mint3loop; i++) {
uint256 tokenId1 = totalCollection1Supply + 1;
uint256 tokenId2 = COLLECTION1_MAX + totalCollection2Supply + 1;
uint256 tokenId3 = COLLECTION1_MAX + COLLECTION2_MAX + totalCollection3Supply + 1;
require(_Collection1Claimed[msg.sender] + _Collection2Claimed[msg.sender] + _Collection3Claimed[msg.sender] + numberOfTokens <= PURCHASE_LIMIT, 'Purchase exceeds max allowed');
totalCollection1Supply += 1;
_Collection1Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId1);
totalCollection2Supply += 1;
_Collection2Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId2);
totalCollection3Supply += 1;
_Collection3Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId3);
}
}
if (balance == 0) {
require(isMasterActive, 'Contract is not active');
require(_Collection1[msg.sender]);
require(_Collection2[msg.sender]);
require(_Collection3[msg.sender]);
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= PURCHASE_LIMIT, 'Cannot purchase this many tokens');
require(_Collection1Claimed[msg.sender] + _Collection2Claimed[msg.sender] + _Collection3Claimed[msg.sender] + numberOfTokens <= PURCHASE_LIMIT, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < mint3loop; i++) {
uint256 tokenId1 = totalCollection1Supply + 1;
uint256 tokenId2 = COLLECTION1_MAX + totalCollection2Supply + 1;
uint256 tokenId3 = COLLECTION1_MAX + COLLECTION2_MAX + totalCollection3Supply + 1;
require(_Collection1Claimed[msg.sender] + _Collection2Claimed[msg.sender] + _Collection3Claimed[msg.sender] + numberOfTokens <= PURCHASE_LIMIT, 'Purchase exceeds max allowed');
totalCollection1Supply += 1;
_Collection1Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId1);
totalCollection2Supply += 1;
_Collection2Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId2);
totalCollection3Supply += 1;
_Collection3Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId3);
}
}
}
function MasterActive(bool _isMasterActive) external override onlyOwner {
isMasterActive = _isMasterActive;
}
function Collection1Active(bool _isCollection1Active) external override onlyOwner {
isCollection1Active = _isCollection1Active;
}
function Collection2Active(bool _isCollection2Active) external override onlyOwner {
isCollection2Active = _isCollection2Active;
}
function Collection3Active(bool _isCollection3Active) external override onlyOwner {
isCollection3Active = _isCollection3Active;
}
function setMessage(string calldata messageString) external override onlyOwner {
message = messageString;
}
function withdraw() external override onlyOwner {
uint256 balance = address(this).balance;
payable(msg.sender).transfer(balance);
}
function setContractURI(string calldata URI) external override onlyOwner {
_contractURI = URI;
}
function setBaseURI(string calldata URI) external override onlyOwner {
_tokenBaseURI = URI;
}
function setRevealedBaseURI(string calldata revealedBaseURI) external override onlyOwner {
_tokenRevealedBaseURI = revealedBaseURI;
}
function contractURI() public view override returns (string memory) {
return _contractURI;
}
function tokenURI(uint256 tokenId) public view override(ERC721) returns (string memory) {
require(_exists(tokenId), 'Token does not exist');
/// @dev Convert string to bytes so we can check if it's empty or not.
string memory revealedBaseURI = _tokenRevealedBaseURI;
return bytes(revealedBaseURI).length > 0 ?
string(abi.encodePacked(revealedBaseURI, tokenId.toString())) :
_tokenBaseURI;
}
} | addToCollection2 | function addToCollection2(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection2[addresses[i]] = true;
_Collection2Claimed[addresses[i]] > 0 ? _Collection2Claimed[addresses[i]] : 0;
}
}
| //Collection2 | LineComment | v0.8.7+commit.e28d00a7 | None | ipfs://088568d4a6e2414908455c2680a5059e53403e6d0bc2886325281f7c5ffd2d5b | {
"func_code_index": [
2692,
3048
]
} | 56,380 |
||
BlankFaceHaylos | BlankFaceHaylosCollab.sol | 0xc4e27c3f0706945932adee2b1d5ce118b70f3fe2 | Solidity | BlankFaceHaylos | contract BlankFaceHaylos is ERC721Enumerable, Ownable, Functions, Metadata {
using Strings for uint256;
BLANKFACE private blankface;
uint256 public constant COLLECTION1_MAX = 10000;
uint256 public constant COLLECTION2_MAX = 10000;
uint256 public constant COLLECTION3_MAX = 10000;
uint256 public constant NFT_MAX = COLLECTION1_MAX + COLLECTION2_MAX + COLLECTION3_MAX;
uint256 public constant PURCHASE_LIMIT = 3;
uint256 public constant PRICE = 0.01 ether;
uint256 public constant mint3loop = 1;
bool public isCollection1Active = false;
bool public isCollection2Active = false;
bool public isCollection3Active = false;
bool public isMasterActive = false;
string public message;
uint256 public Collection1MaxMint = 1;
uint256 public Collection2MaxMint = 1;
uint256 public Collection3MaxMint = 1;
/// @dev We will use these to be able to calculate remaining correctly.
uint256 public totalCollection1Supply;
uint256 public totalCollection2Supply;
uint256 public totalCollection3Supply;
mapping(address => bool) private _Collection1;
mapping(address => uint256) private _Collection1Claimed;
mapping(address => bool) private _Collection2;
mapping(address => uint256) private _Collection2Claimed;
mapping(address => bool) private _Collection3;
mapping(address => uint256) private _Collection3Claimed;
string private _contractURI = '';
string private _tokenBaseURI = '';
string private _tokenRevealedBaseURI = '';
constructor(string memory name, string memory symbol, address dependentContractAddress) ERC721(name, symbol) {
blankface = BLANKFACE(dependentContractAddress);
}
//Collection1
function addToCollection1(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection1[addresses[i]] = true;
_Collection1Claimed[addresses[i]] > 0 ? _Collection1Claimed[addresses[i]] : 0;
}
}
function onCollection1(address addr) external view override returns (bool) {
return _Collection1[addr];
}
function removeFromCollection1(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection1[addresses[i]] = false;
}
}
function Collection1ClaimedBy(address owner) external view override returns (uint256){
require(owner != address(0), 'Zero address');
return _Collection1Claimed[owner];
}
//Collection2
function addToCollection2(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection2[addresses[i]] = true;
_Collection2Claimed[addresses[i]] > 0 ? _Collection2Claimed[addresses[i]] : 0;
}
}
function onCollection2(address addr) external view override returns (bool) {
return _Collection2[addr];
}
function removeFromCollection2(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection2[addresses[i]] = false;
}
}
function Collection2ClaimedBy(address owner) external view override returns (uint256){
require(owner != address(0), 'Zero address');
return _Collection2Claimed[owner];
}
//Collection3
function addToCollection3(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection3[addresses[i]] = true;
_Collection3Claimed[addresses[i]] > 0 ? _Collection3Claimed[addresses[i]] : 0;
}
}
function onCollection3(address addr) external view override returns (bool) {
return _Collection3[addr];
}
function removeFromCollection3(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection3[addresses[i]] = false;
}
}
function Collection3ClaimedBy(address owner) external view override returns (uint256){
require(owner != address(0), 'Zero address');
return _Collection3Claimed[owner];
}
function mintCollection1(uint256 numberOfTokens) external override payable {
uint balance = blankface.balanceOf(msg.sender);
if (balance>0) {
require(balance > 0, "Must hold at least BlankFace");
require(isMasterActive, 'Contract is not active');
require(isCollection1Active, 'Collection is not active');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection1MaxMint, 'Cannot purchase this many tokens');
require(totalCollection1Supply + numberOfTokens <= COLLECTION1_MAX, 'Purchase would exceed max supply');
require(_Collection1Claimed[msg.sender] + numberOfTokens <= Collection1MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = totalCollection1Supply + 1;
totalCollection1Supply += 1;
_Collection1Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
if (balance == 0) {
require(isMasterActive, 'Contract is not active');
require(isCollection1Active, 'Collection is not active');
require(_Collection1[msg.sender], 'Must be on Haylos Whitelist');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection2MaxMint, 'Cannot purchase this many tokens');
require(totalCollection1Supply + numberOfTokens <= COLLECTION1_MAX, 'Purchase would exceed max supply');
require(_Collection1Claimed[msg.sender] + numberOfTokens <= Collection1MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = totalCollection1Supply + 1;
totalCollection1Supply += 1;
_Collection1Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
}
function mintCollection2(uint256 numberOfTokens) external override payable {
uint balance = blankface.balanceOf(msg.sender);
if (balance>0) {
require(balance > 0, "Must hold at least BlankFace");
require(isMasterActive, 'Contract is not active');
require(isCollection2Active, 'Collection is not active');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection2MaxMint, 'Cannot purchase this many tokens');
require(totalCollection2Supply + numberOfTokens <= COLLECTION2_MAX, 'Purchase would exceed max supply');
require(_Collection2Claimed[msg.sender] + numberOfTokens <= Collection2MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = COLLECTION1_MAX + totalCollection2Supply + 1;
totalCollection2Supply += 1;
_Collection2Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
if (balance == 0) {
require(isMasterActive, 'Contract is not active');
require(isCollection2Active, 'Collection is not active');
require(_Collection2[msg.sender], 'Must be on Haylos Whitelist');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection2MaxMint, 'Cannot purchase this many tokens');
require(totalCollection2Supply + numberOfTokens <= COLLECTION2_MAX, 'Purchase would exceed max supply');
require(_Collection2Claimed[msg.sender] + numberOfTokens <= Collection2MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = COLLECTION1_MAX + totalCollection2Supply + 1;
totalCollection2Supply += 1;
_Collection2Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
}
function mintCollection3(uint256 numberOfTokens) external override payable {
uint balance = blankface.balanceOf(msg.sender);
if (balance>0) {
require(balance > 0, "Must hold at least BlankFace");
require(isMasterActive, 'Contract is not active');
require(isCollection3Active, 'Collection is not active');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection3MaxMint, 'Cannot purchase this many tokens');
require(totalCollection3Supply + numberOfTokens <= COLLECTION3_MAX, 'Purchase would exceed max supply');
require(_Collection3Claimed[msg.sender] + numberOfTokens <= Collection3MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = COLLECTION1_MAX + COLLECTION2_MAX + totalCollection1Supply + 1;
totalCollection3Supply += 1;
_Collection3Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
if (balance == 0) {
require(isMasterActive, 'Contract is not active');
require(isCollection3Active, 'Collection is not active');
require(_Collection3[msg.sender], 'Must be on Haylos Whitelist');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= Collection3MaxMint, 'Cannot purchase this many tokens');
require(totalCollection3Supply + numberOfTokens <= COLLECTION3_MAX, 'Purchase would exceed max supply');
require(_Collection3Claimed[msg.sender] + numberOfTokens <= Collection3MaxMint, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < numberOfTokens; i++) {
uint256 tokenId = COLLECTION1_MAX + COLLECTION2_MAX + totalCollection3Supply + 1;
totalCollection3Supply += 1;
_Collection3Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId);
}
}
}
function mintall3(uint256 numberOfTokens) external override payable {
uint balance = blankface.balanceOf(msg.sender);
if (balance>0) {
require(isMasterActive, 'Contract is not active');
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= PURCHASE_LIMIT, 'Cannot purchase this many tokens');
require(_Collection1Claimed[msg.sender] + _Collection2Claimed[msg.sender] + _Collection3Claimed[msg.sender] + numberOfTokens <= PURCHASE_LIMIT, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < mint3loop; i++) {
uint256 tokenId1 = totalCollection1Supply + 1;
uint256 tokenId2 = COLLECTION1_MAX + totalCollection2Supply + 1;
uint256 tokenId3 = COLLECTION1_MAX + COLLECTION2_MAX + totalCollection3Supply + 1;
require(_Collection1Claimed[msg.sender] + _Collection2Claimed[msg.sender] + _Collection3Claimed[msg.sender] + numberOfTokens <= PURCHASE_LIMIT, 'Purchase exceeds max allowed');
totalCollection1Supply += 1;
_Collection1Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId1);
totalCollection2Supply += 1;
_Collection2Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId2);
totalCollection3Supply += 1;
_Collection3Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId3);
}
}
if (balance == 0) {
require(isMasterActive, 'Contract is not active');
require(_Collection1[msg.sender]);
require(_Collection2[msg.sender]);
require(_Collection3[msg.sender]);
require(totalSupply() < NFT_MAX, 'All tokens have been minted');
require(numberOfTokens <= PURCHASE_LIMIT, 'Cannot purchase this many tokens');
require(_Collection1Claimed[msg.sender] + _Collection2Claimed[msg.sender] + _Collection3Claimed[msg.sender] + numberOfTokens <= PURCHASE_LIMIT, 'Purchase exceeds max allowed');
require(PRICE * numberOfTokens <= msg.value, 'ETH amount is not sufficient');
for (uint256 i = 0; i < mint3loop; i++) {
uint256 tokenId1 = totalCollection1Supply + 1;
uint256 tokenId2 = COLLECTION1_MAX + totalCollection2Supply + 1;
uint256 tokenId3 = COLLECTION1_MAX + COLLECTION2_MAX + totalCollection3Supply + 1;
require(_Collection1Claimed[msg.sender] + _Collection2Claimed[msg.sender] + _Collection3Claimed[msg.sender] + numberOfTokens <= PURCHASE_LIMIT, 'Purchase exceeds max allowed');
totalCollection1Supply += 1;
_Collection1Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId1);
totalCollection2Supply += 1;
_Collection2Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId2);
totalCollection3Supply += 1;
_Collection3Claimed[msg.sender] += 1;
_safeMint(msg.sender, tokenId3);
}
}
}
function MasterActive(bool _isMasterActive) external override onlyOwner {
isMasterActive = _isMasterActive;
}
function Collection1Active(bool _isCollection1Active) external override onlyOwner {
isCollection1Active = _isCollection1Active;
}
function Collection2Active(bool _isCollection2Active) external override onlyOwner {
isCollection2Active = _isCollection2Active;
}
function Collection3Active(bool _isCollection3Active) external override onlyOwner {
isCollection3Active = _isCollection3Active;
}
function setMessage(string calldata messageString) external override onlyOwner {
message = messageString;
}
function withdraw() external override onlyOwner {
uint256 balance = address(this).balance;
payable(msg.sender).transfer(balance);
}
function setContractURI(string calldata URI) external override onlyOwner {
_contractURI = URI;
}
function setBaseURI(string calldata URI) external override onlyOwner {
_tokenBaseURI = URI;
}
function setRevealedBaseURI(string calldata revealedBaseURI) external override onlyOwner {
_tokenRevealedBaseURI = revealedBaseURI;
}
function contractURI() public view override returns (string memory) {
return _contractURI;
}
function tokenURI(uint256 tokenId) public view override(ERC721) returns (string memory) {
require(_exists(tokenId), 'Token does not exist');
/// @dev Convert string to bytes so we can check if it's empty or not.
string memory revealedBaseURI = _tokenRevealedBaseURI;
return bytes(revealedBaseURI).length > 0 ?
string(abi.encodePacked(revealedBaseURI, tokenId.toString())) :
_tokenBaseURI;
}
} | addToCollection3 | function addToCollection3(address[] calldata addresses) external override onlyOwner {
for (uint256 i = 0; i < addresses.length; i++) {
require(addresses[i] != address(0), "Can't add the null address");
_Collection3[addresses[i]] = true;
_Collection3Claimed[addresses[i]] > 0 ? _Collection3Claimed[addresses[i]] : 0;
}
}
| //Collection3 | LineComment | v0.8.7+commit.e28d00a7 | None | ipfs://088568d4a6e2414908455c2680a5059e53403e6d0bc2886325281f7c5ffd2d5b | {
"func_code_index": [
3658,
4014
]
} | 56,381 |
||
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC165 | interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
} | /**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/ | NatSpecMultiLine | supportsInterface | function supportsInterface(bytes4 interfaceId) external view returns (bool);
| /**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
374,
455
]
} | 56,382 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC721 | interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
} | /**
* @dev Required interface of an ERC721 compliant contract.
*/ | NatSpecMultiLine | balanceOf | function balanceOf(address owner) external view returns (uint256 balance);
| /**
* @dev Returns the number of tokens in ``owner``'s account.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
719,
798
]
} | 56,383 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC721 | interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
} | /**
* @dev Required interface of an ERC721 compliant contract.
*/ | NatSpecMultiLine | ownerOf | function ownerOf(uint256 tokenId) external view returns (address owner);
| /**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
944,
1021
]
} | 56,384 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC721 | interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
} | /**
* @dev Required interface of an ERC721 compliant contract.
*/ | NatSpecMultiLine | safeTransferFrom | function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
| /**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
1733,
1850
]
} | 56,385 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC721 | interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
} | /**
* @dev Required interface of an ERC721 compliant contract.
*/ | NatSpecMultiLine | transferFrom | function transferFrom(
address from,
address to,
uint256 tokenId
) external;
| /**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
2376,
2489
]
} | 56,386 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC721 | interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
} | /**
* @dev Required interface of an ERC721 compliant contract.
*/ | NatSpecMultiLine | approve | function approve(address to, uint256 tokenId) external;
| /**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
2962,
3022
]
} | 56,387 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC721 | interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
} | /**
* @dev Required interface of an ERC721 compliant contract.
*/ | NatSpecMultiLine | getApproved | function getApproved(uint256 tokenId) external view returns (address operator);
| /**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
3176,
3260
]
} | 56,388 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC721 | interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
} | /**
* @dev Required interface of an ERC721 compliant contract.
*/ | NatSpecMultiLine | setApprovalForAll | function setApprovalForAll(address operator, bool _approved) external;
| /**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
3587,
3662
]
} | 56,389 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC721 | interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
} | /**
* @dev Required interface of an ERC721 compliant contract.
*/ | NatSpecMultiLine | isApprovedForAll | function isApprovedForAll(address owner, address operator) external view returns (bool);
| /**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
3813,
3906
]
} | 56,390 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC721 | interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
} | /**
* @dev Required interface of an ERC721 compliant contract.
*/ | NatSpecMultiLine | safeTransferFrom | function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
| /**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
4483,
4630
]
} | 56,391 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC721Receiver | interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
} | /**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/ | NatSpecMultiLine | onERC721Received | function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
| /**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
528,
698
]
} | 56,392 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC721Metadata | interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
} | /**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/ | NatSpecMultiLine | name | function name() external view returns (string memory);
| /**
* @dev Returns the token collection name.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
106,
165
]
} | 56,393 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC721Metadata | interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
} | /**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/ | NatSpecMultiLine | symbol | function symbol() external view returns (string memory);
| /**
* @dev Returns the token collection symbol.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
236,
297
]
} | 56,394 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | IERC721Metadata | interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
} | /**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/ | NatSpecMultiLine | tokenURI | function tokenURI(uint256 tokenId) external view returns (string memory);
| /**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
398,
476
]
} | 56,395 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | 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 on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
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");
(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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | /**
* @dev Collection of functions related to the address type
*/ | NatSpecMultiLine | isContract | function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
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 | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
606,
998
]
} | 56,396 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | 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 on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
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");
(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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | /**
* @dev Collection of functions related to the address type
*/ | NatSpecMultiLine | sendValue | function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(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 | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
1928,
2250
]
} | 56,397 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | 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 on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
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");
(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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | /**
* @dev Collection of functions related to the address type
*/ | NatSpecMultiLine | 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 | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
3007,
3187
]
} | 56,398 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | 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 on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
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");
(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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | /**
* @dev Collection of functions related to the address type
*/ | NatSpecMultiLine | 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 | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
3412,
3646
]
} | 56,399 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | 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 on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
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");
(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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | /**
* @dev Collection of functions related to the address type
*/ | NatSpecMultiLine | 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 | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
4016,
4281
]
} | 56,400 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | 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 on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
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");
(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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | /**
* @dev Collection of functions related to the address type
*/ | NatSpecMultiLine | 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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, 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 | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
4532,
5048
]
} | 56,401 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | 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 on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
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");
(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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | /**
* @dev Collection of functions related to the address type
*/ | NatSpecMultiLine | functionStaticCall | function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
| /**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
5228,
5432
]
} | 56,402 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | 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 on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
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");
(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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | /**
* @dev Collection of functions related to the address type
*/ | NatSpecMultiLine | functionStaticCall | function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
| /**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
5619,
6020
]
} | 56,403 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | 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 on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
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");
(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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | /**
* @dev Collection of functions related to the address type
*/ | NatSpecMultiLine | functionDelegateCall | function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
| /**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
6202,
6407
]
} | 56,404 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | 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 on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
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");
(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");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
} | /**
* @dev Collection of functions related to the address type
*/ | NatSpecMultiLine | functionDelegateCall | function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
| /**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
6596,
6998
]
} | 56,405 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | Strings | library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
} | /**
* @dev String operations.
*/ | NatSpecMultiLine | toString | function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
| /**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
184,
912
]
} | 56,406 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | Strings | library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
} | /**
* @dev String operations.
*/ | NatSpecMultiLine | toHexString | function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
| /**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
1017,
1362
]
} | 56,407 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | Strings | library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
} | /**
* @dev String operations.
*/ | NatSpecMultiLine | toHexString | function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
| /**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
1485,
1941
]
} | 56,408 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC165 | abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
} | /**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/ | NatSpecMultiLine | supportsInterface | function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
| /**
* @dev See {IERC165-supportsInterface}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
103,
265
]
} | 56,409 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | supportsInterface | function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
| /**
* @dev See {IERC165-supportsInterface}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
971,
1281
]
} | 56,410 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | balanceOf | function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
| /**
* @dev See {IERC721-balanceOf}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
1340,
1553
]
} | 56,411 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | ownerOf | function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
| /**
* @dev See {IERC721-ownerOf}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
1610,
1854
]
} | 56,412 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | name | function name() public view virtual override returns (string memory) {
return _name;
}
| /**
* @dev See {IERC721Metadata-name}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
1916,
2021
]
} | 56,413 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | symbol | function symbol() public view virtual override returns (string memory) {
return _symbol;
}
| /**
* @dev See {IERC721Metadata-symbol}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
2085,
2194
]
} | 56,414 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | tokenURI | function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
| /**
* @dev See {IERC721Metadata-tokenURI}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
2260,
2599
]
} | 56,415 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | _baseURI | function _baseURI() internal view virtual returns (string memory) {
return "";
}
| /**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
2842,
2941
]
} | 56,416 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | approve | function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
| /**
* @dev See {IERC721-approve}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
2998,
3414
]
} | 56,417 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | getApproved | function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
| /**
* @dev See {IERC721-getApproved}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
3475,
3701
]
} | 56,418 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | setApprovalForAll | function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
| /**
* @dev See {IERC721-setApprovalForAll}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
3768,
4068
]
} | 56,419 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | isApprovedForAll | function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
| /**
* @dev See {IERC721-isApprovedForAll}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
4134,
4303
]
} | 56,420 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | transferFrom | function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
| /**
* @dev See {IERC721-transferFrom}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
4365,
4709
]
} | 56,421 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | safeTransferFrom | function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
| /**
* @dev See {IERC721-safeTransferFrom}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
4775,
4965
]
} | 56,422 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | safeTransferFrom | function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
| /**
* @dev See {IERC721-safeTransferFrom}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
5031,
5364
]
} | 56,423 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | _safeTransfer | function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
| /**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
6241,
6561
]
} | 56,424 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | _exists | function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
| /**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
6869,
7001
]
} | 56,425 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | _isApprovedOrOwner | function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
| /**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
7163,
7516
]
} | 56,426 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | _safeMint | function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
| /**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
7853,
7968
]
} | 56,427 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | _safeMint | function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
| /**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
8190,
8516
]
} | 56,428 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | _mint | function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
| /**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
8847,
9234
]
} | 56,429 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | _burn | function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
| /**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
9458,
9823
]
} | 56,430 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | _transfer | function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
| /**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
10155,
10738
]
} | 56,431 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | _approve | function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
| /**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
10851,
11030
]
} | 56,432 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | _checkOnERC721Received | function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
| /**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
11590,
12398
]
} | 56,433 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ERC721 | contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 tokenId
) internal virtual {}
} | /**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/ | NatSpecMultiLine | _beforeTokenTransfer | function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
| /**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` 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 | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
12965,
13096
]
} | 56,434 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | Ownable | abstract 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() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, 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 virtual returns (address) {
return _owner;
}
| /**
* @dev Returns the address of the current owner.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
399,
491
]
} | 56,435 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | Ownable | abstract 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() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, 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 {
_setOwner(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 | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
1050,
1149
]
} | 56,436 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | Ownable | abstract 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() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual 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 {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, 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");
_setOwner(newOwner);
}
| /**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
1299,
1496
]
} | 56,437 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
} | /**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/ | NatSpecMultiLine | tryAdd | function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
| /**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
161,
388
]
} | 56,438 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
} | /**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/ | NatSpecMultiLine | trySub | function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
| /**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
536,
735
]
} | 56,439 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
} | /**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/ | NatSpecMultiLine | tryMul | function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
| /**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
885,
1393
]
} | 56,440 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
} | /**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/ | NatSpecMultiLine | tryDiv | function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
| /**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
1544,
1744
]
} | 56,441 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
} | /**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/ | NatSpecMultiLine | tryMod | function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
| /**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
1905,
2105
]
} | 56,442 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
} | /**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/ | NatSpecMultiLine | add | function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
| /**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
2347,
2450
]
} | 56,443 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
} | /**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/ | NatSpecMultiLine | sub | function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
| /**
* @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 | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
2728,
2831
]
} | 56,444 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
} | /**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/ | NatSpecMultiLine | mul | function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
| /**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
3085,
3188
]
} | 56,445 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
} | /**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/ | NatSpecMultiLine | div | function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
| /**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
3484,
3587
]
} | 56,446 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
} | /**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/ | NatSpecMultiLine | mod | function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
| /**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
4049,
4152
]
} | 56,447 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
} | /**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/ | NatSpecMultiLine | sub | function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
| /**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
4626,
4871
]
} | 56,448 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
} | /**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/ | NatSpecMultiLine | div | function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
| /**
* @dev Returns the integer division of two unsigned integers, reverting 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 | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
5364,
5608
]
} | 56,449 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | SafeMath | library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @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) {
return a + b;
}
/**
* @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 a - b;
}
/**
* @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) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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 a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting 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) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
} | /**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/ | NatSpecMultiLine | mod | function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
| /**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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 | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
6266,
6510
]
} | 56,450 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ECDSA | library ECDSA {
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return recover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return recover(hash, r, vs);
} else {
revert("ECDSA: invalid signature length");
}
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
bytes32 s;
uint8 v;
assembly {
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 27)
}
return recover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`, `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
require(
uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0,
"ECDSA: invalid signature 's' value"
);
require(v == 27 || v == 28, "ECDSA: invalid signature 'v' value");
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
require(signer != address(0), "ECDSA: invalid signature");
return signer;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
} | /**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/ | NatSpecMultiLine | recover | function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return recover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return recover(hash, r, vs);
} else {
revert("ECDSA: invalid signature length");
}
}
| /**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
1039,
2314
]
} | 56,451 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ECDSA | library ECDSA {
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return recover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return recover(hash, r, vs);
} else {
revert("ECDSA: invalid signature length");
}
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
bytes32 s;
uint8 v;
assembly {
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 27)
}
return recover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`, `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
require(
uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0,
"ECDSA: invalid signature 's' value"
);
require(v == 27 || v == 28, "ECDSA: invalid signature 'v' value");
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
require(signer != address(0), "ECDSA: invalid signature");
return signer;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
} | /**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/ | NatSpecMultiLine | recover | function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
bytes32 s;
uint8 v;
assembly {
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 27)
}
return recover(hash, v, r, s);
}
| /**
* @dev Overload of {ECDSA-recover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.2._
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
2569,
2945
]
} | 56,452 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ECDSA | library ECDSA {
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return recover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return recover(hash, r, vs);
} else {
revert("ECDSA: invalid signature length");
}
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
bytes32 s;
uint8 v;
assembly {
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 27)
}
return recover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`, `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
require(
uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0,
"ECDSA: invalid signature 's' value"
);
require(v == 27 || v == 28, "ECDSA: invalid signature 'v' value");
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
require(signer != address(0), "ECDSA: invalid signature");
return signer;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
} | /**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/ | NatSpecMultiLine | recover | function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
require(
uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0,
"ECDSA: invalid signature 's' value"
);
require(v == 27 || v == 28, "ECDSA: invalid signature 'v' value");
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
require(signer != address(0), "ECDSA: invalid signature");
return signer;
}
| /**
* @dev Overload of {ECDSA-recover} that receives the `v`, `r` and `s` signature fields separately.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
3071,
4585
]
} | 56,453 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ECDSA | library ECDSA {
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return recover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return recover(hash, r, vs);
} else {
revert("ECDSA: invalid signature length");
}
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
bytes32 s;
uint8 v;
assembly {
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 27)
}
return recover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`, `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
require(
uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0,
"ECDSA: invalid signature 's' value"
);
require(v == 27 || v == 28, "ECDSA: invalid signature 'v' value");
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
require(signer != address(0), "ECDSA: invalid signature");
return signer;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
} | /**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/ | NatSpecMultiLine | toEthSignedMessageHash | function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
| /**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
4880,
5154
]
} | 56,454 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | ECDSA | library ECDSA {
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return recover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return recover(hash, r, vs);
} else {
revert("ECDSA: invalid signature length");
}
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
bytes32 s;
uint8 v;
assembly {
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 27)
}
return recover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`, `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
require(
uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0,
"ECDSA: invalid signature 's' value"
);
require(v == 27 || v == 28, "ECDSA: invalid signature 'v' value");
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
require(signer != address(0), "ECDSA: invalid signature");
return signer;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
} | /**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/ | NatSpecMultiLine | toTypedDataHash | function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
| /**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
5499,
5700
]
} | 56,455 |
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | JPandFriends | contract JPandFriends is Context, ERC721, Ownable {
using SafeMath for uint256;
using Counters for Counters.Counter;
Counters.Counter private _tokenIdTracker;
Counters.Counter private _whiteListCount;
uint256 public salePrice = 37 * 10**15;
uint256 public constant MAX_ELEMENTS = 4000;
address public constant creatorAddress = 0x6c474099ad6d9Af49201a38b9842111d4ACd10BC;
string public baseTokenURI;
bool public placeHolder = true;
bool public saleOn = true;
bool public listOnly = true;
uint256 wlc = 4000;
uint256 private _royaltyBps = 500;
address payable private _royaltyRecipient;
bytes4 private constant _INTERFACE_ID_ROYALTIES_CREATORCORE = 0xbb3bafd6;
bytes4 private constant _INTERFACE_ID_ROYALTIES_EIP2981 = 0x2a55205a;
bytes4 private constant _INTERFACE_ID_ROYALTIES_RARIBLE = 0xb7799584;
mapping (address => bool) public whitelist;
mapping (address => uint8) public totalBought;
event Mint(address indexed sender, uint256 count, uint256 paid, uint256 price);
event UpdateRoyalty(address indexed _address, uint256 _bps);
/**
* deploys the contract.
*/
constructor(string memory _uri) payable ERC721("J. Pierce & Friends", "JPF") {
_royaltyRecipient = payable(msg.sender);
baseTokenURI = _uri;
}
function _totalSupply() internal view returns (uint) {
return _tokenIdTracker.current();
}
modifier saleIsOpen {
require(_totalSupply() <= MAX_ELEMENTS, "Sale end");
require(saleOn, "Sale hasnt started");
_;
}
function totalSupply() public view returns (uint256) {
return _totalSupply();
}
function mint(uint8 _count, address _to, uint256 code) public payable saleIsOpen {
uint256 total = _totalSupply();
uint256 cost = salePrice.mul(_count);
require(total + _count <= MAX_ELEMENTS, "Max limit");
require(msg.value >= price(_count), "Value below price");
if(listOnly) {
require(code == wlc, "Sender not on whitelist");
require(totalBought[_to] + _count < 5, "MAX WHITELIST AMOUNT PURCHASED");
totalBought[_to] = totalBought[_to] + _count;
_mintElements(_count, _to);
Mint(_to, _count, cost, salePrice);
} else {
require(totalBought[_to] + _count < 13, "MAX GENERAL SALE AMOUNT PURCHASED");
totalBought[_to] = totalBought[_to] + _count;
_mintElements(_count, _to);
Mint(_to, _count, cost, salePrice);
}
}
function creditCardMint(uint8 _count, address _to) public saleIsOpen onlyOwner {
uint256 total = _totalSupply();
uint256 cost = salePrice.mul(_count);
require(total + _count <= MAX_ELEMENTS, "Max limit");
Mint(_to, _count, cost, salePrice);
_mintElements(_count, _to);
}
function _mintElements(uint256 _count, address _to) private {
for (uint256 i = 0; i < _count; i++) {
_tokenIdTracker.increment();
_safeMint(_to, _tokenIdTracker.current());
}
}
function price(uint256 _count) public view returns (uint256) {
return salePrice.mul(_count);
}
// Set price
function setPrice(uint256 _price) public onlyOwner{
salePrice = _price;
}
function setWlc(uint256 _wlc) public onlyOwner{
wlc = _wlc;
}
// Function to withdraw all Ether and tokens from this contract.
function withdraw() public onlyOwner{
uint amount = address(this).balance;
// send all Ether to owner
// Owner can receive Ether since the address of owner is payable
(bool success, ) = owner().call{value: amount}("");
require(success, "Failed to send Ether");
}
function setBaseURI(string memory baseURI) public onlyOwner {
baseTokenURI = baseURI;
}
function setPlaceHolder(bool isOn) public onlyOwner {
placeHolder = isOn;
}
function setSaleOn(bool isOn) public onlyOwner {
saleOn = isOn;
}
function setListOnly(bool isOn) public onlyOwner {
listOnly = isOn;
}
function tokenURI(uint256 _id) public view virtual override returns (string memory) {
if(placeHolder) {
return baseTokenURI;
} else {
return string(abi.encodePacked(baseTokenURI, uint2str(_id), ".json"));
}
}
/**
* @dev Update royalties
*/
function updateRoyalties(address payable recipient, uint256 bps) external onlyOwner {
_royaltyRecipient = recipient;
_royaltyBps = bps;
emit UpdateRoyalty(recipient, bps);
}
/**
* ROYALTY FUNCTIONS
*/
function getRoyalties(uint256) external view returns (address payable[] memory recipients, uint256[] memory bps) {
if (_royaltyRecipient != address(0x0)) {
recipients = new address payable[](1);
recipients[0] = _royaltyRecipient;
bps = new uint256[](1);
bps[0] = _royaltyBps;
}
return (recipients, bps);
}
function getFeeRecipients(uint256) external view returns (address payable[] memory recipients) {
if (_royaltyRecipient != address(0x0)) {
recipients = new address payable[](1);
recipients[0] = _royaltyRecipient;
}
return recipients;
}
function getFeeBps(uint256) external view returns (uint[] memory bps) {
if (_royaltyRecipient != address(0x0)) {
bps = new uint256[](1);
bps[0] = _royaltyBps;
}
return bps;
}
function royaltyInfo(uint256, uint256 value) external view returns (address, uint256) {
return (_royaltyRecipient, value*_royaltyBps/10000);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721) returns (bool) {
return ERC721.supportsInterface(interfaceId) || interfaceId == _INTERFACE_ID_ROYALTIES_CREATORCORE
|| interfaceId == _INTERFACE_ID_ROYALTIES_EIP2981 || interfaceId == _INTERFACE_ID_ROYALTIES_RARIBLE;
}
function uint2str(
uint256 _i
)
internal
pure
returns (string memory str)
{
if (_i == 0)
{
return "0";
}
uint256 j = _i;
uint256 length;
while (j != 0)
{
length++;
j /= 10;
}
bytes memory bstr = new bytes(length);
uint256 k = length;
j = _i;
while (j != 0)
{
bstr[--k] = bytes1(uint8(48 + j % 10));
j /= 10;
}
str = string(bstr);
}
} | setPrice | function setPrice(uint256 _price) public onlyOwner{
salePrice = _price;
}
| // Set price | LineComment | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
3292,
3384
]
} | 56,456 |
||
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | JPandFriends | contract JPandFriends is Context, ERC721, Ownable {
using SafeMath for uint256;
using Counters for Counters.Counter;
Counters.Counter private _tokenIdTracker;
Counters.Counter private _whiteListCount;
uint256 public salePrice = 37 * 10**15;
uint256 public constant MAX_ELEMENTS = 4000;
address public constant creatorAddress = 0x6c474099ad6d9Af49201a38b9842111d4ACd10BC;
string public baseTokenURI;
bool public placeHolder = true;
bool public saleOn = true;
bool public listOnly = true;
uint256 wlc = 4000;
uint256 private _royaltyBps = 500;
address payable private _royaltyRecipient;
bytes4 private constant _INTERFACE_ID_ROYALTIES_CREATORCORE = 0xbb3bafd6;
bytes4 private constant _INTERFACE_ID_ROYALTIES_EIP2981 = 0x2a55205a;
bytes4 private constant _INTERFACE_ID_ROYALTIES_RARIBLE = 0xb7799584;
mapping (address => bool) public whitelist;
mapping (address => uint8) public totalBought;
event Mint(address indexed sender, uint256 count, uint256 paid, uint256 price);
event UpdateRoyalty(address indexed _address, uint256 _bps);
/**
* deploys the contract.
*/
constructor(string memory _uri) payable ERC721("J. Pierce & Friends", "JPF") {
_royaltyRecipient = payable(msg.sender);
baseTokenURI = _uri;
}
function _totalSupply() internal view returns (uint) {
return _tokenIdTracker.current();
}
modifier saleIsOpen {
require(_totalSupply() <= MAX_ELEMENTS, "Sale end");
require(saleOn, "Sale hasnt started");
_;
}
function totalSupply() public view returns (uint256) {
return _totalSupply();
}
function mint(uint8 _count, address _to, uint256 code) public payable saleIsOpen {
uint256 total = _totalSupply();
uint256 cost = salePrice.mul(_count);
require(total + _count <= MAX_ELEMENTS, "Max limit");
require(msg.value >= price(_count), "Value below price");
if(listOnly) {
require(code == wlc, "Sender not on whitelist");
require(totalBought[_to] + _count < 5, "MAX WHITELIST AMOUNT PURCHASED");
totalBought[_to] = totalBought[_to] + _count;
_mintElements(_count, _to);
Mint(_to, _count, cost, salePrice);
} else {
require(totalBought[_to] + _count < 13, "MAX GENERAL SALE AMOUNT PURCHASED");
totalBought[_to] = totalBought[_to] + _count;
_mintElements(_count, _to);
Mint(_to, _count, cost, salePrice);
}
}
function creditCardMint(uint8 _count, address _to) public saleIsOpen onlyOwner {
uint256 total = _totalSupply();
uint256 cost = salePrice.mul(_count);
require(total + _count <= MAX_ELEMENTS, "Max limit");
Mint(_to, _count, cost, salePrice);
_mintElements(_count, _to);
}
function _mintElements(uint256 _count, address _to) private {
for (uint256 i = 0; i < _count; i++) {
_tokenIdTracker.increment();
_safeMint(_to, _tokenIdTracker.current());
}
}
function price(uint256 _count) public view returns (uint256) {
return salePrice.mul(_count);
}
// Set price
function setPrice(uint256 _price) public onlyOwner{
salePrice = _price;
}
function setWlc(uint256 _wlc) public onlyOwner{
wlc = _wlc;
}
// Function to withdraw all Ether and tokens from this contract.
function withdraw() public onlyOwner{
uint amount = address(this).balance;
// send all Ether to owner
// Owner can receive Ether since the address of owner is payable
(bool success, ) = owner().call{value: amount}("");
require(success, "Failed to send Ether");
}
function setBaseURI(string memory baseURI) public onlyOwner {
baseTokenURI = baseURI;
}
function setPlaceHolder(bool isOn) public onlyOwner {
placeHolder = isOn;
}
function setSaleOn(bool isOn) public onlyOwner {
saleOn = isOn;
}
function setListOnly(bool isOn) public onlyOwner {
listOnly = isOn;
}
function tokenURI(uint256 _id) public view virtual override returns (string memory) {
if(placeHolder) {
return baseTokenURI;
} else {
return string(abi.encodePacked(baseTokenURI, uint2str(_id), ".json"));
}
}
/**
* @dev Update royalties
*/
function updateRoyalties(address payable recipient, uint256 bps) external onlyOwner {
_royaltyRecipient = recipient;
_royaltyBps = bps;
emit UpdateRoyalty(recipient, bps);
}
/**
* ROYALTY FUNCTIONS
*/
function getRoyalties(uint256) external view returns (address payable[] memory recipients, uint256[] memory bps) {
if (_royaltyRecipient != address(0x0)) {
recipients = new address payable[](1);
recipients[0] = _royaltyRecipient;
bps = new uint256[](1);
bps[0] = _royaltyBps;
}
return (recipients, bps);
}
function getFeeRecipients(uint256) external view returns (address payable[] memory recipients) {
if (_royaltyRecipient != address(0x0)) {
recipients = new address payable[](1);
recipients[0] = _royaltyRecipient;
}
return recipients;
}
function getFeeBps(uint256) external view returns (uint[] memory bps) {
if (_royaltyRecipient != address(0x0)) {
bps = new uint256[](1);
bps[0] = _royaltyBps;
}
return bps;
}
function royaltyInfo(uint256, uint256 value) external view returns (address, uint256) {
return (_royaltyRecipient, value*_royaltyBps/10000);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721) returns (bool) {
return ERC721.supportsInterface(interfaceId) || interfaceId == _INTERFACE_ID_ROYALTIES_CREATORCORE
|| interfaceId == _INTERFACE_ID_ROYALTIES_EIP2981 || interfaceId == _INTERFACE_ID_ROYALTIES_RARIBLE;
}
function uint2str(
uint256 _i
)
internal
pure
returns (string memory str)
{
if (_i == 0)
{
return "0";
}
uint256 j = _i;
uint256 length;
while (j != 0)
{
length++;
j /= 10;
}
bytes memory bstr = new bytes(length);
uint256 k = length;
j = _i;
while (j != 0)
{
bstr[--k] = bytes1(uint8(48 + j % 10));
j /= 10;
}
str = string(bstr);
}
} | withdraw | function withdraw() public onlyOwner{
uint amount = address(this).balance;
// send all Ether to owner
// Owner can receive Ether since the address of owner is payable
(bool success, ) = owner().call{value: amount}("");
require(success, "Failed to send Ether");
}
| // Function to withdraw all Ether and tokens from this contract. | LineComment | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
3540,
3861
]
} | 56,457 |
||
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | JPandFriends | contract JPandFriends is Context, ERC721, Ownable {
using SafeMath for uint256;
using Counters for Counters.Counter;
Counters.Counter private _tokenIdTracker;
Counters.Counter private _whiteListCount;
uint256 public salePrice = 37 * 10**15;
uint256 public constant MAX_ELEMENTS = 4000;
address public constant creatorAddress = 0x6c474099ad6d9Af49201a38b9842111d4ACd10BC;
string public baseTokenURI;
bool public placeHolder = true;
bool public saleOn = true;
bool public listOnly = true;
uint256 wlc = 4000;
uint256 private _royaltyBps = 500;
address payable private _royaltyRecipient;
bytes4 private constant _INTERFACE_ID_ROYALTIES_CREATORCORE = 0xbb3bafd6;
bytes4 private constant _INTERFACE_ID_ROYALTIES_EIP2981 = 0x2a55205a;
bytes4 private constant _INTERFACE_ID_ROYALTIES_RARIBLE = 0xb7799584;
mapping (address => bool) public whitelist;
mapping (address => uint8) public totalBought;
event Mint(address indexed sender, uint256 count, uint256 paid, uint256 price);
event UpdateRoyalty(address indexed _address, uint256 _bps);
/**
* deploys the contract.
*/
constructor(string memory _uri) payable ERC721("J. Pierce & Friends", "JPF") {
_royaltyRecipient = payable(msg.sender);
baseTokenURI = _uri;
}
function _totalSupply() internal view returns (uint) {
return _tokenIdTracker.current();
}
modifier saleIsOpen {
require(_totalSupply() <= MAX_ELEMENTS, "Sale end");
require(saleOn, "Sale hasnt started");
_;
}
function totalSupply() public view returns (uint256) {
return _totalSupply();
}
function mint(uint8 _count, address _to, uint256 code) public payable saleIsOpen {
uint256 total = _totalSupply();
uint256 cost = salePrice.mul(_count);
require(total + _count <= MAX_ELEMENTS, "Max limit");
require(msg.value >= price(_count), "Value below price");
if(listOnly) {
require(code == wlc, "Sender not on whitelist");
require(totalBought[_to] + _count < 5, "MAX WHITELIST AMOUNT PURCHASED");
totalBought[_to] = totalBought[_to] + _count;
_mintElements(_count, _to);
Mint(_to, _count, cost, salePrice);
} else {
require(totalBought[_to] + _count < 13, "MAX GENERAL SALE AMOUNT PURCHASED");
totalBought[_to] = totalBought[_to] + _count;
_mintElements(_count, _to);
Mint(_to, _count, cost, salePrice);
}
}
function creditCardMint(uint8 _count, address _to) public saleIsOpen onlyOwner {
uint256 total = _totalSupply();
uint256 cost = salePrice.mul(_count);
require(total + _count <= MAX_ELEMENTS, "Max limit");
Mint(_to, _count, cost, salePrice);
_mintElements(_count, _to);
}
function _mintElements(uint256 _count, address _to) private {
for (uint256 i = 0; i < _count; i++) {
_tokenIdTracker.increment();
_safeMint(_to, _tokenIdTracker.current());
}
}
function price(uint256 _count) public view returns (uint256) {
return salePrice.mul(_count);
}
// Set price
function setPrice(uint256 _price) public onlyOwner{
salePrice = _price;
}
function setWlc(uint256 _wlc) public onlyOwner{
wlc = _wlc;
}
// Function to withdraw all Ether and tokens from this contract.
function withdraw() public onlyOwner{
uint amount = address(this).balance;
// send all Ether to owner
// Owner can receive Ether since the address of owner is payable
(bool success, ) = owner().call{value: amount}("");
require(success, "Failed to send Ether");
}
function setBaseURI(string memory baseURI) public onlyOwner {
baseTokenURI = baseURI;
}
function setPlaceHolder(bool isOn) public onlyOwner {
placeHolder = isOn;
}
function setSaleOn(bool isOn) public onlyOwner {
saleOn = isOn;
}
function setListOnly(bool isOn) public onlyOwner {
listOnly = isOn;
}
function tokenURI(uint256 _id) public view virtual override returns (string memory) {
if(placeHolder) {
return baseTokenURI;
} else {
return string(abi.encodePacked(baseTokenURI, uint2str(_id), ".json"));
}
}
/**
* @dev Update royalties
*/
function updateRoyalties(address payable recipient, uint256 bps) external onlyOwner {
_royaltyRecipient = recipient;
_royaltyBps = bps;
emit UpdateRoyalty(recipient, bps);
}
/**
* ROYALTY FUNCTIONS
*/
function getRoyalties(uint256) external view returns (address payable[] memory recipients, uint256[] memory bps) {
if (_royaltyRecipient != address(0x0)) {
recipients = new address payable[](1);
recipients[0] = _royaltyRecipient;
bps = new uint256[](1);
bps[0] = _royaltyBps;
}
return (recipients, bps);
}
function getFeeRecipients(uint256) external view returns (address payable[] memory recipients) {
if (_royaltyRecipient != address(0x0)) {
recipients = new address payable[](1);
recipients[0] = _royaltyRecipient;
}
return recipients;
}
function getFeeBps(uint256) external view returns (uint[] memory bps) {
if (_royaltyRecipient != address(0x0)) {
bps = new uint256[](1);
bps[0] = _royaltyBps;
}
return bps;
}
function royaltyInfo(uint256, uint256 value) external view returns (address, uint256) {
return (_royaltyRecipient, value*_royaltyBps/10000);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721) returns (bool) {
return ERC721.supportsInterface(interfaceId) || interfaceId == _INTERFACE_ID_ROYALTIES_CREATORCORE
|| interfaceId == _INTERFACE_ID_ROYALTIES_EIP2981 || interfaceId == _INTERFACE_ID_ROYALTIES_RARIBLE;
}
function uint2str(
uint256 _i
)
internal
pure
returns (string memory str)
{
if (_i == 0)
{
return "0";
}
uint256 j = _i;
uint256 length;
while (j != 0)
{
length++;
j /= 10;
}
bytes memory bstr = new bytes(length);
uint256 k = length;
j = _i;
while (j != 0)
{
bstr[--k] = bytes1(uint8(48 + j % 10));
j /= 10;
}
str = string(bstr);
}
} | updateRoyalties | function updateRoyalties(address payable recipient, uint256 bps) external onlyOwner {
_royaltyRecipient = recipient;
_royaltyBps = bps;
emit UpdateRoyalty(recipient, bps);
}
| /**
* @dev Update royalties
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
4564,
4774
]
} | 56,458 |
||
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | JPandFriends | contract JPandFriends is Context, ERC721, Ownable {
using SafeMath for uint256;
using Counters for Counters.Counter;
Counters.Counter private _tokenIdTracker;
Counters.Counter private _whiteListCount;
uint256 public salePrice = 37 * 10**15;
uint256 public constant MAX_ELEMENTS = 4000;
address public constant creatorAddress = 0x6c474099ad6d9Af49201a38b9842111d4ACd10BC;
string public baseTokenURI;
bool public placeHolder = true;
bool public saleOn = true;
bool public listOnly = true;
uint256 wlc = 4000;
uint256 private _royaltyBps = 500;
address payable private _royaltyRecipient;
bytes4 private constant _INTERFACE_ID_ROYALTIES_CREATORCORE = 0xbb3bafd6;
bytes4 private constant _INTERFACE_ID_ROYALTIES_EIP2981 = 0x2a55205a;
bytes4 private constant _INTERFACE_ID_ROYALTIES_RARIBLE = 0xb7799584;
mapping (address => bool) public whitelist;
mapping (address => uint8) public totalBought;
event Mint(address indexed sender, uint256 count, uint256 paid, uint256 price);
event UpdateRoyalty(address indexed _address, uint256 _bps);
/**
* deploys the contract.
*/
constructor(string memory _uri) payable ERC721("J. Pierce & Friends", "JPF") {
_royaltyRecipient = payable(msg.sender);
baseTokenURI = _uri;
}
function _totalSupply() internal view returns (uint) {
return _tokenIdTracker.current();
}
modifier saleIsOpen {
require(_totalSupply() <= MAX_ELEMENTS, "Sale end");
require(saleOn, "Sale hasnt started");
_;
}
function totalSupply() public view returns (uint256) {
return _totalSupply();
}
function mint(uint8 _count, address _to, uint256 code) public payable saleIsOpen {
uint256 total = _totalSupply();
uint256 cost = salePrice.mul(_count);
require(total + _count <= MAX_ELEMENTS, "Max limit");
require(msg.value >= price(_count), "Value below price");
if(listOnly) {
require(code == wlc, "Sender not on whitelist");
require(totalBought[_to] + _count < 5, "MAX WHITELIST AMOUNT PURCHASED");
totalBought[_to] = totalBought[_to] + _count;
_mintElements(_count, _to);
Mint(_to, _count, cost, salePrice);
} else {
require(totalBought[_to] + _count < 13, "MAX GENERAL SALE AMOUNT PURCHASED");
totalBought[_to] = totalBought[_to] + _count;
_mintElements(_count, _to);
Mint(_to, _count, cost, salePrice);
}
}
function creditCardMint(uint8 _count, address _to) public saleIsOpen onlyOwner {
uint256 total = _totalSupply();
uint256 cost = salePrice.mul(_count);
require(total + _count <= MAX_ELEMENTS, "Max limit");
Mint(_to, _count, cost, salePrice);
_mintElements(_count, _to);
}
function _mintElements(uint256 _count, address _to) private {
for (uint256 i = 0; i < _count; i++) {
_tokenIdTracker.increment();
_safeMint(_to, _tokenIdTracker.current());
}
}
function price(uint256 _count) public view returns (uint256) {
return salePrice.mul(_count);
}
// Set price
function setPrice(uint256 _price) public onlyOwner{
salePrice = _price;
}
function setWlc(uint256 _wlc) public onlyOwner{
wlc = _wlc;
}
// Function to withdraw all Ether and tokens from this contract.
function withdraw() public onlyOwner{
uint amount = address(this).balance;
// send all Ether to owner
// Owner can receive Ether since the address of owner is payable
(bool success, ) = owner().call{value: amount}("");
require(success, "Failed to send Ether");
}
function setBaseURI(string memory baseURI) public onlyOwner {
baseTokenURI = baseURI;
}
function setPlaceHolder(bool isOn) public onlyOwner {
placeHolder = isOn;
}
function setSaleOn(bool isOn) public onlyOwner {
saleOn = isOn;
}
function setListOnly(bool isOn) public onlyOwner {
listOnly = isOn;
}
function tokenURI(uint256 _id) public view virtual override returns (string memory) {
if(placeHolder) {
return baseTokenURI;
} else {
return string(abi.encodePacked(baseTokenURI, uint2str(_id), ".json"));
}
}
/**
* @dev Update royalties
*/
function updateRoyalties(address payable recipient, uint256 bps) external onlyOwner {
_royaltyRecipient = recipient;
_royaltyBps = bps;
emit UpdateRoyalty(recipient, bps);
}
/**
* ROYALTY FUNCTIONS
*/
function getRoyalties(uint256) external view returns (address payable[] memory recipients, uint256[] memory bps) {
if (_royaltyRecipient != address(0x0)) {
recipients = new address payable[](1);
recipients[0] = _royaltyRecipient;
bps = new uint256[](1);
bps[0] = _royaltyBps;
}
return (recipients, bps);
}
function getFeeRecipients(uint256) external view returns (address payable[] memory recipients) {
if (_royaltyRecipient != address(0x0)) {
recipients = new address payable[](1);
recipients[0] = _royaltyRecipient;
}
return recipients;
}
function getFeeBps(uint256) external view returns (uint[] memory bps) {
if (_royaltyRecipient != address(0x0)) {
bps = new uint256[](1);
bps[0] = _royaltyBps;
}
return bps;
}
function royaltyInfo(uint256, uint256 value) external view returns (address, uint256) {
return (_royaltyRecipient, value*_royaltyBps/10000);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721) returns (bool) {
return ERC721.supportsInterface(interfaceId) || interfaceId == _INTERFACE_ID_ROYALTIES_CREATORCORE
|| interfaceId == _INTERFACE_ID_ROYALTIES_EIP2981 || interfaceId == _INTERFACE_ID_ROYALTIES_RARIBLE;
}
function uint2str(
uint256 _i
)
internal
pure
returns (string memory str)
{
if (_i == 0)
{
return "0";
}
uint256 j = _i;
uint256 length;
while (j != 0)
{
length++;
j /= 10;
}
bytes memory bstr = new bytes(length);
uint256 k = length;
j = _i;
while (j != 0)
{
bstr[--k] = bytes1(uint8(48 + j % 10));
j /= 10;
}
str = string(bstr);
}
} | getRoyalties | function getRoyalties(uint256) external view returns (address payable[] memory recipients, uint256[] memory bps) {
if (_royaltyRecipient != address(0x0)) {
recipients = new address payable[](1);
recipients[0] = _royaltyRecipient;
bps = new uint256[](1);
bps[0] = _royaltyBps;
}
return (recipients, bps);
}
| /**
* ROYALTY FUNCTIONS
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
4823,
5217
]
} | 56,459 |
||
JPandFriends | JPandFriends.sol | 0x633cfa9ac099d18c1b33736892427f0a7c1d120a | Solidity | JPandFriends | contract JPandFriends is Context, ERC721, Ownable {
using SafeMath for uint256;
using Counters for Counters.Counter;
Counters.Counter private _tokenIdTracker;
Counters.Counter private _whiteListCount;
uint256 public salePrice = 37 * 10**15;
uint256 public constant MAX_ELEMENTS = 4000;
address public constant creatorAddress = 0x6c474099ad6d9Af49201a38b9842111d4ACd10BC;
string public baseTokenURI;
bool public placeHolder = true;
bool public saleOn = true;
bool public listOnly = true;
uint256 wlc = 4000;
uint256 private _royaltyBps = 500;
address payable private _royaltyRecipient;
bytes4 private constant _INTERFACE_ID_ROYALTIES_CREATORCORE = 0xbb3bafd6;
bytes4 private constant _INTERFACE_ID_ROYALTIES_EIP2981 = 0x2a55205a;
bytes4 private constant _INTERFACE_ID_ROYALTIES_RARIBLE = 0xb7799584;
mapping (address => bool) public whitelist;
mapping (address => uint8) public totalBought;
event Mint(address indexed sender, uint256 count, uint256 paid, uint256 price);
event UpdateRoyalty(address indexed _address, uint256 _bps);
/**
* deploys the contract.
*/
constructor(string memory _uri) payable ERC721("J. Pierce & Friends", "JPF") {
_royaltyRecipient = payable(msg.sender);
baseTokenURI = _uri;
}
function _totalSupply() internal view returns (uint) {
return _tokenIdTracker.current();
}
modifier saleIsOpen {
require(_totalSupply() <= MAX_ELEMENTS, "Sale end");
require(saleOn, "Sale hasnt started");
_;
}
function totalSupply() public view returns (uint256) {
return _totalSupply();
}
function mint(uint8 _count, address _to, uint256 code) public payable saleIsOpen {
uint256 total = _totalSupply();
uint256 cost = salePrice.mul(_count);
require(total + _count <= MAX_ELEMENTS, "Max limit");
require(msg.value >= price(_count), "Value below price");
if(listOnly) {
require(code == wlc, "Sender not on whitelist");
require(totalBought[_to] + _count < 5, "MAX WHITELIST AMOUNT PURCHASED");
totalBought[_to] = totalBought[_to] + _count;
_mintElements(_count, _to);
Mint(_to, _count, cost, salePrice);
} else {
require(totalBought[_to] + _count < 13, "MAX GENERAL SALE AMOUNT PURCHASED");
totalBought[_to] = totalBought[_to] + _count;
_mintElements(_count, _to);
Mint(_to, _count, cost, salePrice);
}
}
function creditCardMint(uint8 _count, address _to) public saleIsOpen onlyOwner {
uint256 total = _totalSupply();
uint256 cost = salePrice.mul(_count);
require(total + _count <= MAX_ELEMENTS, "Max limit");
Mint(_to, _count, cost, salePrice);
_mintElements(_count, _to);
}
function _mintElements(uint256 _count, address _to) private {
for (uint256 i = 0; i < _count; i++) {
_tokenIdTracker.increment();
_safeMint(_to, _tokenIdTracker.current());
}
}
function price(uint256 _count) public view returns (uint256) {
return salePrice.mul(_count);
}
// Set price
function setPrice(uint256 _price) public onlyOwner{
salePrice = _price;
}
function setWlc(uint256 _wlc) public onlyOwner{
wlc = _wlc;
}
// Function to withdraw all Ether and tokens from this contract.
function withdraw() public onlyOwner{
uint amount = address(this).balance;
// send all Ether to owner
// Owner can receive Ether since the address of owner is payable
(bool success, ) = owner().call{value: amount}("");
require(success, "Failed to send Ether");
}
function setBaseURI(string memory baseURI) public onlyOwner {
baseTokenURI = baseURI;
}
function setPlaceHolder(bool isOn) public onlyOwner {
placeHolder = isOn;
}
function setSaleOn(bool isOn) public onlyOwner {
saleOn = isOn;
}
function setListOnly(bool isOn) public onlyOwner {
listOnly = isOn;
}
function tokenURI(uint256 _id) public view virtual override returns (string memory) {
if(placeHolder) {
return baseTokenURI;
} else {
return string(abi.encodePacked(baseTokenURI, uint2str(_id), ".json"));
}
}
/**
* @dev Update royalties
*/
function updateRoyalties(address payable recipient, uint256 bps) external onlyOwner {
_royaltyRecipient = recipient;
_royaltyBps = bps;
emit UpdateRoyalty(recipient, bps);
}
/**
* ROYALTY FUNCTIONS
*/
function getRoyalties(uint256) external view returns (address payable[] memory recipients, uint256[] memory bps) {
if (_royaltyRecipient != address(0x0)) {
recipients = new address payable[](1);
recipients[0] = _royaltyRecipient;
bps = new uint256[](1);
bps[0] = _royaltyBps;
}
return (recipients, bps);
}
function getFeeRecipients(uint256) external view returns (address payable[] memory recipients) {
if (_royaltyRecipient != address(0x0)) {
recipients = new address payable[](1);
recipients[0] = _royaltyRecipient;
}
return recipients;
}
function getFeeBps(uint256) external view returns (uint[] memory bps) {
if (_royaltyRecipient != address(0x0)) {
bps = new uint256[](1);
bps[0] = _royaltyBps;
}
return bps;
}
function royaltyInfo(uint256, uint256 value) external view returns (address, uint256) {
return (_royaltyRecipient, value*_royaltyBps/10000);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721) returns (bool) {
return ERC721.supportsInterface(interfaceId) || interfaceId == _INTERFACE_ID_ROYALTIES_CREATORCORE
|| interfaceId == _INTERFACE_ID_ROYALTIES_EIP2981 || interfaceId == _INTERFACE_ID_ROYALTIES_RARIBLE;
}
function uint2str(
uint256 _i
)
internal
pure
returns (string memory str)
{
if (_i == 0)
{
return "0";
}
uint256 j = _i;
uint256 length;
while (j != 0)
{
length++;
j /= 10;
}
bytes memory bstr = new bytes(length);
uint256 k = length;
j = _i;
while (j != 0)
{
bstr[--k] = bytes1(uint8(48 + j % 10));
j /= 10;
}
str = string(bstr);
}
} | supportsInterface | function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721) returns (bool) {
return ERC721.supportsInterface(interfaceId) || interfaceId == _INTERFACE_ID_ROYALTIES_CREATORCORE
|| interfaceId == _INTERFACE_ID_ROYALTIES_EIP2981 || interfaceId == _INTERFACE_ID_ROYALTIES_RARIBLE;
}
| /**
* @dev See {IERC165-supportsInterface}.
*/ | NatSpecMultiLine | v0.8.0+commit.c7dfd78e | None | ipfs://327342c26e4311f78fa2b6b056476c26fc567aa663743e220575714fa19536a8 | {
"func_code_index": [
5988,
6325
]
} | 56,460 |
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