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YFI_YFV

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/**

*Submitted for verification at Etherscan.io on 2020-07-17

*Submitted for verification at Etherscan.io on 2020-08-16

pragma solidity ^0.5.16;

interface IERC20 {

function totalSupply() external view returns (uint);

function balanceOf(address account) external view returns (uint);

function transfer(address recipient, uint amount) external returns (bool);

function allowance(address owner, address spender) external view returns (uint);

function approve(address spender, uint amount) external returns (bool);

function transferFrom(address sender, address recipient, uint amount) external returns (bool);

event Transfer(address indexed from, address indexed to, uint value);

event Approval(address indexed owner, address indexed spender, uint value);

}

contract Context {

constructor () internal { }

// solhint-disable-previous-line no-empty-blocks

function _msgSender() internal view returns (address payable) {

return msg.sender;

}

contract ERC20 is Context, IERC20 {

using SafeMath for uint;

mapping (address => uint) private _balances;

mapping (address => mapping (address => uint)) private _allowances;

uint private _totalSupply;

function totalSupply() public view returns (uint) {

return _totalSupply;

}

function balanceOf(address account) public view returns (uint) {

return _balances[account];

}

function transfer(address recipient, uint amount) public returns (bool) {

_transfer(_msgSender(), recipient, amount);

return true;

}

function allowance(address owner, address spender) public view returns (uint) {

return _allowances[owner][spender];

}

function approve(address spender, uint amount) public returns (bool) {

_approve(_msgSender(), spender, amount);

return true;

}

function transferFrom(address sender, address recipient, uint amount) public returns (bool) {

_transfer(sender, recipient, amount);

_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));

return true;

}

function increaseAllowance(address spender, uint addedValue) public returns (bool) {

_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));

return true;

}

function decreaseAllowance(address spender, uint subtractedValue) public returns (bool) {

_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));

return true;

}

function _transfer(address sender, address recipient, uint amount) internal {

require(sender != address(0), "ERC20: transfer from the zero address");

require(recipient != address(0), "ERC20: transfer to the zero address");

_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");

_balances[recipient] = _balances[recipient].add(amount);

emit Transfer(sender, recipient, amount);

}

function _mint(address account, uint amount) internal {

require(account != address(0), "ERC20: mint to the zero address");

_totalSupply = _totalSupply.add(amount);

_balances[account] = _balances[account].add(amount);

emit Transfer(address(0), account, amount);

}

function _burn(address account, uint amount) internal {

require(account != address(0), "ERC20: burn from the zero address");

_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");

_totalSupply = _totalSupply.sub(amount);

emit Transfer(account, address(0), amount);

}

function _approve(address owner, address spender, uint amount) internal {

require(owner != address(0), "ERC20: approve from the zero address");

require(spender != address(0), "ERC20: approve to the zero address");

_allowances[owner][spender] = amount;

emit Approval(owner, spender, amount);

}

contract ERC20Detailed is IERC20 {

string private _name;

string private _symbol;

uint8 private _decimals;

constructor (string memory name, string memory symbol, uint8 decimals) public {

_name = name;

_symbol = symbol;

_decimals = decimals;

}

function name() public view returns (string memory) {

return _name;

}

function symbol() public view returns (string memory) {

return _symbol;

}

function decimals() public view returns (uint8) {

return _decimals;

}

library SafeMath {

function add(uint a, uint b) internal pure returns (uint) {

uint c = a + b;

require(c >= a, "SafeMath: addition overflow");

return c;

}

function sub(uint a, uint b) internal pure returns (uint) {

return sub(a, b, "SafeMath: subtraction overflow");

}

function sub(uint a, uint b, string memory errorMessage) internal pure returns (uint) {

require(b <= a, errorMessage);

uint c = a - b;

return c;

}

function mul(uint a, uint b) internal pure returns (uint) {

if (a == 0) {

return 0;

}

uint c = a * b;

require(c / a == b, "SafeMath: multiplication overflow");

return c;

}

function div(uint a, uint b) internal pure returns (uint) {

return div(a, b, "SafeMath: division by zero");

}

function div(uint a, uint b, string memory errorMessage) internal pure returns (uint) {

// Solidity only automatically asserts when dividing by 0

require(b > 0, errorMessage);

uint c = a / b;

return c;

}

library Address {

function isContract(address account) internal view returns (bool) {

bytes32 codehash;

bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;

// solhint-disable-next-line no-inline-assembly

assembly { codehash := extcodehash(account) }

return (codehash != 0x0 && codehash != accountHash);

}

library SafeERC20 {

using SafeMath for uint;

using Address for address;

function safeTransfer(IERC20 token, address to, uint value) internal {

callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));

}

function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {

callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));

}

function safeApprove(IERC20 token, address spender, uint value) internal {

require((value == 0) || (token.allowance(address(this), spender) == 0),

"SafeERC20: approve from non-zero to non-zero allowance"

);

callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));

}

function callOptionalReturn(IERC20 token, bytes memory data) private {

require(address(token).isContract(), "SafeERC20: call to non-contract");

// solhint-disable-next-line avoid-low-level-calls

(bool success, bytes memory returndata) = address(token).call(data);

require(success, "SafeERC20: low-level call failed");

if (returndata.length > 0) { // Return data is optional

// solhint-disable-next-line max-line-length

require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");

}

contract YFI is ERC20, ERC20Detailed {

contract YFV is ERC20, ERC20Detailed {

using SafeERC20 for IERC20;

using Address for address;

using SafeMath for uint;

address public governance;

mapping (address => bool) public minters;

constructor () public ERC20Detailed("yearn.finance", "YFI", 18) {

address public governance;

governance = msg.sender;

mapping (address => bool) public minters;

}

function mint(address account, uint amount) public {

constructor () public ERC20Detailed("YFValue", "YFV", 18) {

require(minters[msg.sender], "!minter");

governance = msg.sender;

_mint(account, amount);

}

function mint(address account, uint256 amount) public {

function setGovernance(address _governance) public {

require(minters[msg.sender], "!minter");

require(msg.sender == governance, "!governance");

_mint(account, amount);

governance = _governance;

}

function burn(uint256 amount) public {

function addMinter(address _minter) public {

_burn(msg.sender, amount);

require(msg.sender == governance, "!governance");

}

minters[_minter] = true;

}

function setGovernance(address _governance) public {

require(msg.sender == governance, "!governance");

function removeMinter(address _minter) public {

governance = _governance;

require(msg.sender == governance, "!governance");

}

minters[_minter] = false;

}

function addMinter(address _minter) public {

}

require(msg.sender == governance, "!governance");

minters[_minter] = true;

}

function removeMinter(address _minter) public {

require(msg.sender == governance, "!governance");

minters[_minter] = false;

}

保存された差分

原文

ファイルを開く

/**
 *Submitted for verification at Etherscan.io on 2020-07-17
*/

pragma solidity ^0.5.16;

interface IERC20 {
    function totalSupply() external view returns (uint);
    function balanceOf(address account) external view returns (uint);
    function transfer(address recipient, uint amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint);
    function approve(address spender, uint amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint amount) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint value);
    event Approval(address indexed owner, address indexed spender, uint value);
}

contract Context {
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }
}

contract ERC20 is Context, IERC20 {
    using SafeMath for uint;

mapping (address => uint) private _balances;

mapping (address => mapping (address => uint)) private _allowances;

uint private _totalSupply;
    function totalSupply() public view returns (uint) {
        return _totalSupply;
    }
    function balanceOf(address account) public view returns (uint) {
        return _balances[account];
    }
    function transfer(address recipient, uint amount) public returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
    function allowance(address owner, address spender) public view returns (uint) {
        return _allowances[owner][spender];
    }
    function approve(address spender, uint amount) public returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }
    function transferFrom(address sender, address recipient, uint amount) public returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }
    function increaseAllowance(address spender, uint addedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }
    function decreaseAllowance(address spender, uint subtractedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }
    function _transfer(address sender, address recipient, uint amount) internal {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }
    function _mint(address account, uint amount) internal {
        require(account != address(0), "ERC20: mint to the zero address");

_totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }
    function _burn(address account, uint amount) internal {
        require(account != address(0), "ERC20: burn from the zero address");

_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }
    function _approve(address owner, address spender, uint amount) internal {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

_allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
}

contract ERC20Detailed is IERC20 {
    string private _name;
    string private _symbol;
    uint8 private _decimals;

constructor (string memory name, string memory symbol, uint8 decimals) public {
        _name = name;
        _symbol = symbol;
        _decimals = decimals;
    }
    function name() public view returns (string memory) {
        return _name;
    }
    function symbol() public view returns (string memory) {
        return _symbol;
    }
    function decimals() public view returns (uint8) {
        return _decimals;
    }
}

library SafeMath {
    function add(uint a, uint b) internal pure returns (uint) {
        uint c = a + b;
        require(c >= a, "SafeMath: addition overflow");

return c;
    }
    function sub(uint a, uint b) internal pure returns (uint) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }
    function sub(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
        require(b <= a, errorMessage);
        uint c = a - b;

return c;
    }
    function mul(uint a, uint b) internal pure returns (uint) {
        if (a == 0) {
            return 0;
        }

uint c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

return c;
    }
    function div(uint a, uint b) internal pure returns (uint) {
        return div(a, b, "SafeMath: division by zero");
    }
    function div(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint c = a / b;

return c;
    }
}

library Address {
    function isContract(address account) internal view returns (bool) {
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != 0x0 && codehash != accountHash);
    }
}

library SafeERC20 {
    using SafeMath for uint;
    using Address for address;

function safeTransfer(IERC20 token, address to, uint value) internal {
        callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
        callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

function safeApprove(IERC20 token, address spender, uint value) internal {
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }
    function callOptionalReturn(IERC20 token, bytes memory data) private {
        require(address(token).isContract(), "SafeERC20: call to non-contract");

// solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = address(token).call(data);
        require(success, "SafeERC20: low-level call failed");

if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

contract YFI is ERC20, ERC20Detailed {
  using SafeERC20 for IERC20;
  using Address for address;
  using SafeMath for uint;
  
  
  address public governance;
  mapping (address => bool) public minters;

constructor () public ERC20Detailed("yearn.finance", "YFI", 18) {
      governance = msg.sender;
  }

変更されたテキスト

ファイルを開く

/**
 *Submitted for verification at Etherscan.io on 2020-08-16
*/

pragma solidity ^0.5.16;

contract Context {
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }
}

contract ERC20 is Context, IERC20 {
    using SafeMath for uint;

mapping (address => uint) private _balances;

mapping (address => mapping (address => uint)) private _allowances;

_allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
}

contract ERC20Detailed is IERC20 {
    string private _name;
    string private _symbol;
    uint8 private _decimals;

library SafeMath {
    function add(uint a, uint b) internal pure returns (uint) {
        uint c = a + b;
        require(c >= a, "SafeMath: addition overflow");

return c;
    }
    function mul(uint a, uint b) internal pure returns (uint) {
        if (a == 0) {
            return 0;
        }

uint c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

return c;
    }
}

library SafeERC20 {
    using SafeMath for uint;
    using Address for address;

function safeTransfer(IERC20 token, address to, uint value) internal {
        callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
        callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

// solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = address(token).call(data);
        require(success, "SafeERC20: low-level call failed");

contract YFV is ERC20, ERC20Detailed {
    using SafeERC20 for IERC20;
    using Address for address;
    using SafeMath for uint;

address public governance;
    mapping (address => bool) public minters;

constructor () public ERC20Detailed("YFValue", "YFV", 18) {
        governance = msg.sender;
    }

function mint(address account, uint256 amount) public {
        require(minters[msg.sender], "!minter");
        _mint(account, amount);
    }

function burn(uint256 amount) public {
        _burn(msg.sender, amount);
    }

function setGovernance(address _governance) public {
        require(msg.sender == governance, "!governance");
        governance = _governance;
    }

function addMinter(address _minter) public {
        require(msg.sender == governance, "!governance");
        minters[_minter] = true;
    }

function removeMinter(address _minter) public {
        require(msg.sender == governance, "!governance");
        minters[_minter] = false;
    }
}