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ERC-20
Overview
Max Total Supply
1,111 DRT
Holders
79
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
1 DRTValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Minimal Proxy Contract for 0xc1dedb2c7c7708103132dcb763bf2353579e771a
Contract Name:
GovernToken
Compiler Version
v0.6.8+commit.0bbfe453
Contract Source Code (Solidity Multiple files format)
/* * SPDX-License-Identifier: GPL-3.0 */ pragma solidity ^0.6.8; import './Initializable.sol'; import './SafeMath.sol'; import './IERC20.sol'; // Copied and slightly modified from https://github.com/aragon/aragon-network-token/blob/v2-v1.0.0/packages/v2/contracts/token.sol // Lightweight token modelled after UNI-LP: https://github.com/Uniswap/uniswap-v2-core/blob/v1.0.1/contracts/UniswapV2ERC20.sol // Adds: // - An exposed `mint()` with minting role // - An exposed `burn()` // - ERC-3009 (`transferWithAuthorization()`) contract GovernToken is IERC20, Initializable { using SafeMath for uint256; // bytes32 private constant EIP712DOMAIN_HASH = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)") bytes32 private constant EIP712DOMAIN_HASH = 0x8b73c3c69bb8fe3d512ecc4cf759cc79239f7b179b0ffacaa9a75d522b39400f; // bytes32 private constant VERSION_HASH = keccak256("1") bytes32 private constant VERSION_HASH = 0xc89efdaa54c0f20c7adf612882df0950f5a951637e0307cdcb4c672f298b8bc6; // bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"); bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9; // bytes32 public constant TRANSFER_WITH_AUTHORIZATION_TYPEHASH = // keccak256("TransferWithAuthorization(address from,address to,uint256 value,uint256 validAfter,uint256 validBefore,bytes32 nonce)"); bytes32 public constant TRANSFER_WITH_AUTHORIZATION_TYPEHASH = 0x7c7c6cdb67a18743f49ec6fa9b35f50d52ed05cbed4cc592e13b44501c1a2267; string public name; string public symbol; uint8 public decimals; address public minter; uint256 override public totalSupply; mapping (address => uint256) override public balanceOf; mapping (address => mapping (address => uint256)) override public allowance; // ERC-2612, ERC-3009 state mapping (address => uint256) public nonces; mapping (address => mapping (bytes32 => bool)) public authorizationState; event Approval(address indexed owner, address indexed spender, uint256 value); event Transfer(address indexed from, address indexed to, uint256 value); event AuthorizationUsed(address indexed authorizer, bytes32 indexed nonce); event ChangeMinter(address indexed minter); modifier onlyMinter { require(msg.sender == minter, "token: not minter"); _; } constructor(address _initialMinter, string memory _name, string memory _symbol, uint8 _decimals) public { initialize(_initialMinter, _name, _symbol, _decimals); } function initialize(address _initialMinter, string memory _name, string memory _symbol, uint8 _decimals) public onlyInit("token") { _changeMinter(_initialMinter); name = _name; symbol = _symbol; decimals = _decimals; } function _validateSignedData(address signer, bytes32 encodeData, uint8 v, bytes32 r, bytes32 s) internal view { bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", getDomainSeparator(), encodeData ) ); address recoveredAddress = ecrecover(digest, v, r, s); // Explicitly disallow authorizations for address(0) as ecrecover returns address(0) on malformed messages require(recoveredAddress != address(0) && recoveredAddress == signer, "token: bad sig"); } function _changeMinter(address newMinter) internal { minter = newMinter; emit ChangeMinter(newMinter); } function _mint(address to, uint256 value) internal { totalSupply = totalSupply.add(value); balanceOf[to] = balanceOf[to].add(value); emit Transfer(address(0), to, value); } function _burn(address from, uint value) internal { // Balance is implicitly checked with SafeMath's underflow protection balanceOf[from] = balanceOf[from].sub(value); totalSupply = totalSupply.sub(value); emit Transfer(from, address(0), value); } function _approve(address owner, address spender, uint256 value) private { allowance[owner][spender] = value; emit Approval(owner, spender, value); } function _transfer(address from, address to, uint256 value) private { require(to != address(this) && to != address(0), "token: bad to"); // Balance is implicitly checked with SafeMath's underflow protection balanceOf[from] = balanceOf[from].sub(value); balanceOf[to] = balanceOf[to].add(value); emit Transfer(from, to, value); } function getChainId() public pure returns (uint256 chainId) { assembly { chainId := chainid() } } function getDomainSeparator() public view returns (bytes32) { return keccak256( abi.encode( EIP712DOMAIN_HASH, keccak256(abi.encodePacked(name)), VERSION_HASH, getChainId(), address(this) ) ); } function mint(address to, uint256 value) external onlyMinter returns (bool) { _mint(to, value); return true; } function changeMinter(address newMinter) external onlyMinter { _changeMinter(newMinter); } function burn(uint256 value) external returns (bool) { _burn(msg.sender, value); return true; } function approve(address spender, uint256 value) override external returns (bool) { _approve(msg.sender, spender, value); return true; } function transfer(address to, uint256 value) override external returns (bool) { _transfer(msg.sender, to, value); return true; } function transferFrom(address from, address to, uint256 value) override external returns (bool) { uint256 fromAllowance = allowance[from][msg.sender]; if (fromAllowance != uint256(-1)) { // Allowance is implicitly checked with SafeMath's underflow protection allowance[from][msg.sender] = fromAllowance.sub(value); } _transfer(from, to, value); return true; } function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external { require(deadline >= block.timestamp, "token: auth expired"); bytes32 encodeData = keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline)); _validateSignedData(owner, encodeData, v, r, s); _approve(owner, spender, value); } function transferWithAuthorization( address from, address to, uint256 value, uint256 validAfter, uint256 validBefore, bytes32 nonce, uint8 v, bytes32 r, bytes32 s ) external { require(block.timestamp > validAfter, "token: auth wait"); require(block.timestamp < validBefore, "token: auth expired"); require(!authorizationState[from][nonce], "token: auth used"); bytes32 encodeData = keccak256(abi.encode(TRANSFER_WITH_AUTHORIZATION_TYPEHASH, from, to, value, validAfter, validBefore, nonce)); _validateSignedData(from, encodeData, v, r, s); authorizationState[from][nonce] = true; emit AuthorizationUsed(from, nonce); _transfer(from, to, value); } }
File 2 of 4: IERC20.sol
/* * SPDX-License-Identifier: GPL-3.0 */ pragma solidity ^0.6.8; interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transfer(address recipient, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); }
File 3 of 4: Initializable.sol
/* * SPDX-License-Identifier: MIT */ pragma solidity 0.6.8; contract Initializable { mapping (string => uint256) public initBlocks; event Initialized(string indexed key); modifier onlyInit(string memory key) { require(initBlocks[key] == 0, "initializable: already initialized"); initBlocks[key] = block.number; _; emit Initialized(key); } }
File 4 of 4: SafeMath.sol
/* * SPDX-License-Identifier: GPL-3.0 */ pragma solidity ^0.6.8; // A library for performing overflow-safe math, courtesy of DappHub: https://github.com/dapphub/ds-math/blob/d0ef6d6a5f/src/math.sol // Modified to include only the essentials library SafeMath { function add(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x + y) >= x, "math: overflow"); } function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x, "math: underflow"); } }
[{"inputs":[{"internalType":"address","name":"_initialMinter","type":"address"},{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint8","name":"_decimals","type":"uint8"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"authorizer","type":"address"},{"indexed":true,"internalType":"bytes32","name":"nonce","type":"bytes32"}],"name":"AuthorizationUsed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"minter","type":"address"}],"name":"ChangeMinter","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"string","name":"key","type":"string"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"PERMIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TRANSFER_WITH_AUTHORIZATION_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"authorizationState","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"value","type":"uint256"}],"name":"burn","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newMinter","type":"address"}],"name":"changeMinter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getChainId","outputs":[{"internalType":"uint256","name":"chainId","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"getDomainSeparator","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"","type":"string"}],"name":"initBlocks","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_initialMinter","type":"address"},{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint8","name":"_decimals","type":"uint8"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"mint","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"minter","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"validAfter","type":"uint256"},{"internalType":"uint256","name":"validBefore","type":"uint256"},{"internalType":"bytes32","name":"nonce","type":"bytes32"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"transferWithAuthorization","outputs":[],"stateMutability":"nonpayable","type":"function"}]
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