Question

我有一份合同已经部署到主要的以太坊网络，合同代码在部署时可以正常编译，我可以使用metamask / MEW与合同进行交互。

但是，当我去验证Etherscan上的合同时，我收到了编译错误。

我正在使用etherscan的beta truffle编译器：https://etherscan.io/verifyContract2

我使用npm truffle-flattener

将所有代码拼凑在一起

我使用：https://abi.hashex.org/

创建了编码的构造函数参数

然后我在truffle.js中使用了运行= 200的优化器：

  solc: {
    optimizer: {
      enabled: true,
      runs: 200
    }
  }

然后我使用了下面JSON文件中设置的编译器版本：

...
...
  },
  "compiler": {
    "name": "solc",
    "version": "0.4.21+commit.dfe3193c.Emscripten.clang"
  },
  "networks": {
    "1": {
      "events": {},
      "links": {
        "SaleStagesLib": "0x0ea918c7c1bed2358530baad064d361438543067",
        "BytesDeserializer": "0x278cfd9ed99cf90ebe2e1a750b50e5811a81af77"
      },
      "address": "0x3a2c34ba7be06c7104bb642f4ce74dc4c317f373",
      "transactionHash": "0x02e0a895cd3dcf98ee71b9d823d69b5701d6e76bd326757babac1c2bf805ff8d"
    }
  },
  "schemaVersion": "2.0.0",
  "updatedAt": "2018-03-31T14:09:25.579Z"
}

以下内容抛出了指向Ownable合同的etherscan中的ParseError：

contract Ownable {
  address public owner;

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

  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  function Ownable() public {
    owner = msg.sender;
  }

  /**
   * @dev Throws if called by any account other than the owner.
   */
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }


  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param newOwner The address to transfer ownership to.
   */
  function transferOwnership(address newOwner) public onlyOwner {
    require(newOwner != address(0));
    emit OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

错误如下：

myc:150:30: ParserError: Expected token Semicolon got 'LParen'
    emit OwnershipTransferred(owner, newOwner)
                             ^

但是，我想指出这段代码编译正确，松露没有错误，我已经成功地与主网上的合同进行了互动。

为什么编译器会抛出此错误？

Answer 1

我删除了＆＃39;发出＆＃39;导致ParseError被抛出并且验证工作。我相信这可能是松露和etherscans编译器版本之间的问题。

验证Etherscan上的Truffle合约时的ParserError

1 个答案: