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Minimal Proxy Contract for 0x42ca48648b355e64ef68330e1743a4fa7e310e67
Contract Name:
ERC20
Compiler Version
v0.8.10+commit.fc410830
Optimization Enabled:
Yes with 2000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.10; import {Ownable} from "../../lib/Ownable.sol"; import {IERC20Events, IERC20} from "./interface/IERC20.sol"; /** * @title ERC20 * @notice EIP-20 (https://eips.ethereum.org/EIPS/eip-20) implementation with EIP-2612 * (https://eips.ethereum.org/EIPS/eip-2612) support, as well as mint and burn functionality. * @author MirrorXYZ */ contract ERC20 is Ownable, IERC20, IERC20Events { /// @notice Separator used for permit /// @dev keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)") bytes32 public constant override PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9; /// @notice Token total supply uint256 public override totalSupply; /// @notice Token name string public override name; /// @notice Token symbol string public override symbol; /// @notice Token decimals uint8 public override decimals; /// @notice Token balance mapping(address => uint256) public override balanceOf; /// @notice Token allowance mapping(address => mapping(address => uint256)) public override allowance; /// @notice Separator used on permit bytes32 public override DOMAIN_SEPARATOR; /// @notice Nonces used on permit mapping(address => uint256) public override nonces; /// @notice Token burn status bool public burnable; /// @notice Factory that deploys clones address public immutable factory; modifier ifBurnable() { require(burnable, "ERC20: cannot burn"); _; } /// @dev Ownable parameter is irrelevant since this is a logic file. constructor(address factory_) Ownable(address(0)) { factory = factory_; } /// @notice Set initial parameters, mint initial supply to owner and set the owner. /// @dev Only callable by the factory /// @param owner_ The owner of the token contract /// @param name_ The name of the token /// @param symbol_ The symbol of the token /// @param totalSupply_ The totalSupply of the token /// @param decimals_ The decimals of the token function initialize( address owner_, string memory name_, string memory symbol_, uint256 totalSupply_, uint8 decimals_ ) external override returns (address) { // ensure that this function is only callable by the factory require(msg.sender == factory, "unauthorized caller"); // set owner _setOwner(address(0), owner_); // set metadata name = name_; symbol = symbol_; decimals = decimals_; // mint initial supply _mint(owner_, totalSupply_); // generate domain separator DOMAIN_SEPARATOR = keccak256( abi.encode( keccak256( "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)" ), keccak256(bytes(name_)), keccak256(bytes("1")), block.chainid, address(this) ) ); // set burn status burnable = false; return address(this); } /// @notice Change burn status, only callable by the owner. /// @param canBurn The burn status of the token function setBurnable(bool canBurn) external override onlyOwner { burnable = canBurn; } // ============ ERC-20 Methods ============ /// @notice Approve `spender` to transfer up to `value` from `msg.sender` /// @dev This will overwrite the approval value for `spender` /// and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) /// @param spender The address of the account which may transfer tokens /// @param value The number of tokens that are approved /// @return Whether or not the approval succeeded function approve(address spender, uint256 value) external override returns (bool) { _approve(msg.sender, spender, value); return true; } /// @notice Transfer `value` tokens from `msg.sender` to `to` /// @param to The address of the destination account /// @param value The number of tokens to transfer /// @return Whether or not the transfer succeeded function transfer(address to, uint256 value) external override returns (bool) { _transfer(msg.sender, to, value); return true; } /// @notice Transfer `value` tokens from `from` to `to` /// @param from The address of the source account /// @param to The address of the destination account /// @param value The number of tokens to transfer /// @return Whether or not the transfer succeeded function transferFrom( address from, address to, uint256 value ) external override returns (bool) { if (allowance[from][msg.sender] != type(uint256).max) { allowance[from][msg.sender] -= value; } _transfer(from, to, value); return true; } /// @notice Triggers an approval from `_owner` to `spender` /// @param _owner The address to approve from /// @param spender The address to be approved /// @param value The number of tokens that are approved (2^256-1 means infinite) /// @param deadline The time at which to expire the signature /// @param v The recovery byte of the signature /// @param r Half of the ECDSA signature pair /// @param s Half of the ECDSA signature pair function permit( address _owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external override { require(deadline >= block.timestamp, "ERC20: EXPIRED"); bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256( abi.encode( PERMIT_TYPEHASH, _owner, spender, value, nonces[_owner]++, deadline ) ) ) ); address recoveredAddress = ecrecover(digest, v, r, s); require( recoveredAddress != address(0) && recoveredAddress == _owner, "ERC20: INVALID_SIGNATURE" ); _approve(_owner, spender, value); } /// @notice Burn `value` from `msg.sender`'s balance /// @dev Throws when the token is not burnable /// @param value The value to burn function burn(uint256 value) external override ifBurnable { _burn(msg.sender, value); } /// @notice Mint `value` tokens to `to` /// @dev Only callable by the owner, throws otherwise /// @param to The account to mint tokens to /// @param value The number of tokens to mint function mint(address to, uint256 value) external override onlyOwner { _mint(to, value); } // ============ Internal Methods ============ function _transfer( address from, address to, uint256 value ) internal { require(to != address(0), "ERC20: transfer to the zero address"); balanceOf[from] -= value; // Cannot overflow because the sum of all user // balances can't exceed the max uint256 value. unchecked { balanceOf[to] += value; } emit Transfer(from, to, value); } function _mint(address to, uint256 value) internal { require(to != address(0), "ERC20: mint to the zero address"); totalSupply += value; // Cannot overflow because the sum of all user // balances can't exceed the max uint256 value. unchecked { balanceOf[to] += value; } emit Transfer(address(0), to, value); } function _approve( address _owner, address spender, uint256 value ) internal { allowance[_owner][spender] = value; emit Approval(_owner, spender, value); } function _burn(address from, uint256 value) internal { balanceOf[from] -= value; // Cannot underflow because a user's balance // will never be larger than the total supply. unchecked { totalSupply -= value; } emit Transfer(from, address(0), value); } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.10; interface IOwnableEvents { event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); } contract Ownable is IOwnableEvents { address public owner; address private nextOwner; // modifiers modifier onlyOwner() { require(isOwner(), "caller is not the owner."); _; } modifier onlyNextOwner() { require(isNextOwner(), "current owner must set caller as next owner."); _; } /** * @dev Initialize contract by setting transaction submitter as initial owner. */ constructor(address owner_) { owner = owner_; emit OwnershipTransferred(address(0), owner); } /** * @dev Initiate ownership transfer by setting nextOwner. */ function transferOwnership(address nextOwner_) external onlyOwner { require(nextOwner_ != address(0), "Next owner is the zero address."); nextOwner = nextOwner_; } /** * @dev Cancel ownership transfer by deleting nextOwner. */ function cancelOwnershipTransfer() external onlyOwner { delete nextOwner; } /** * @dev Accepts ownership transfer by setting owner. */ function acceptOwnership() external onlyNextOwner { delete nextOwner; owner = msg.sender; emit OwnershipTransferred(owner, msg.sender); } /** * @dev Renounce ownership by setting owner to zero address. */ function renounceOwnership() external onlyOwner { _renounceOwnership(); } /** * @dev Returns true if the caller is the current owner. */ function isOwner() public view returns (bool) { return msg.sender == owner; } /** * @dev Returns true if the caller is the next owner. */ function isNextOwner() public view returns (bool) { return msg.sender == nextOwner; } function _setOwner(address previousOwner, address newOwner) internal { owner = newOwner; emit OwnershipTransferred(previousOwner, owner); } function _renounceOwnership() internal { emit OwnershipTransferred(owner, address(0)); owner = address(0); } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity 0.8.10; interface IERC20Events { /// @notice EIP-20 transfer event event Transfer(address indexed _from, address indexed _to, uint256 _value); /// @notice EIP-20 approval event event Approval( address indexed _owner, address indexed _spender, uint256 _value ); /// @notice Mint event event Mint(address indexed _to, uint256 _value); } interface IERC20 { function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external view returns (bytes32); function initialize( address operator_, string memory name_, string memory symbol_, uint256 totalSupply_, uint8 decimals_ ) external returns (address); function setBurnable(bool canBurn) external; function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address owner) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 value) external returns (bool); function transfer(address to, uint256 value) external returns (bool); function transferFrom( address from, address to, uint256 amount ) external returns (bool); function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; function nonces(address owner) external view returns (uint256); function mint(address to, uint256 amount) external; function burn(uint256 amount) external; }
{ "optimizer": { "enabled": true, "runs": 2000 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
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