源文件需要不同的编译器版本：Truffle

Question

我牢固地编写了一个简单的智能合约，并尝试用松露迁移它。

$ truffle migrate
Compiling .\contracts\Election.sol...
Compiling .\contracts\Migrations.sol...

    /D/ethereum/electiondemo/contracts/Migrations.sol:1:1: SyntaxError: Source file requires different compiler version (current compiler is 0.5.0+commit.1d4f565a.Emscripten.clang - note that nightly builds are considered to be strictly less than the released version
    pragma solidity ^0.4.24;
    ^----------------------^

Compilation failed. See above.`enter code here`
Truffle v5.0.0 (core: 5.0.0)
Node v8.11.1

实体版本为0.5.0。请找到以下智能合约代码：

pragma solidity ^0.5.0;

contract Election {
    // Read/write candidate
    string public candidate;

    // Constructor
    constructor ( ) public {
        candidate = "Candidate 1";
    }
}

Answer 1

得到了解决方案：在truffle.js中。您需要指定实体版本

module.exports = {
  // See <http://truffleframework.com/docs/advanced/configuration>
  // for more about customizing your Truffle configuration!
  networks: {
    development: {
      host: "127.0.0.1",
      port: 7545,
      network_id: "*" // Match any network id
    }
  },
  compilers: {
    solc: {
      **version: "0.4.24"** // ex:  "0.4.20". (Default: Truffle's installed solc)
    }
 }
};

智能合约中也需要同样的条件

Answer 2

将下面的行添加到 truffle-config.js

{
  compilers: {
    solc: {
      version: "0.4.24" // ex:  "0.4.20". (Default: Truffle's installed solc)
    }
  }
}