FIL雲算力系統開發原始碼搭建(現成案例)

lxqy1668發表於2023-04-19

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  function renounceOwnership() public virtual onlyOwner {

  

  _transferOwnership(address(0));

  

  }

  

  function transferOwnership(address newOwner) public virtual onlyOwner {

  

  require(newOwner != address(0), "Ownable: new owner is the zero address");

  

  _transferOwnership(newOwner);

  

  }

  

  function _transferOwnership(address newOwner) internal virtual {

  

  address oldOwner = _owner;

  

  _owner = newOwner;

  

  emit OwnershipTransferred(oldOwner, newOwner);

  

  }

  

  }

  

  interface IERC20 {

  

  function totalSupply() external view returns (uint256);

  

  function sub(uint256 a, uint256 b) internal pure returns (uint256) {

  

  assert(b <= a);

  

  return a - b;

  

  }

  

  function add(uint256 a, uint256 b) internal pure returns (uint256) {

  

  uint256 c = a + b;

  

  assert(c >= a);

  

  return c;

  

  }

  

  }

  

  contract Ownable {

  

  address public owner;

  

  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

  

  function Ownable() public {

  

  owner = msg.sender;

  

  }

  

  modifier onlyOwner() {

  

  require(msg.sender == owner);

  

  _;

  

  }


來自 “ ITPUB部落格 ” ,連結:http://blog.itpub.net/70020038/viewspace-2946776/,如需轉載,請註明出處,否則將追究法律責任。

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