contracts:Token0x的智能合约

智能合约 Token0x的智能合约示例 pragma solidity ^ 0.4 .21 ; contract Ownable { address public owner ; function Ownable ( ) public { owner = msg . sender ; } modifier onlyOwner ( ) { require ( msg . sender == owner ) ; _ ; } function transferOwnership ( address newOwner ) public onlyOwner { owner = newOwner ; } } contract MultiOwnable { mapping (