在Ropsten网络上部署智能契约

Question

我正试图在Ropsten网络上部署一个测试合同。我正在使用元询问，恩弗拉和松露来创建和测试合同。我的文件夹结构如下所示

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我的迁移文件有以下代码

const TestContract = artifacts.require("TestContract");

module.exports = function(deployer) {
  deployer.deploy(TestContract);
};

当我运行松露迁移时，我得到了以下错误：无法从任何来源找到用于迁移的工件，

我的松露-config.js看起来如下

    const HDWalletProvider = require('truffle-hdwallet-provider')
module.exports = {
    networks: {
        ropsten: {
            provider: function() {
                return new HDWalletProvider("Mnemonic key", "https://ropsten.infura.io/v3/API_KEY")
            },
            network_id: 3,
            gas: 4000000
        }
    },
    contracts_directory: './src/contracts/',
    contracts_build_directory: './src/abis/',
    compilers: {
        solc: {
            optimizer: {
                enabled: true,
                runs: 200
            }
        }
    }
}

Answer 1

您需要在contracts文件夹中有Migrations合同：

pragma solidity >=0.4.25 <0.6.0;

contract Migrations {
  address public owner;
  uint public last_completed_migration;

  modifier restricted() {
    if (msg.sender == owner) _;
  }

  constructor() public {
    owner = msg.sender;
  }

  function setCompleted(uint completed) public restricted {
    last_completed_migration = completed;
  }

  function upgrade(address new_address) public restricted {
    Migrations upgraded = Migrations(new_address);
    upgraded.setCompleted(last_completed_migration);
  }
}

也是迁移文件夹中的1_initial_migration.js：

const Migrations = artifacts.require("Migrations");

module.exports = function(deployer) {
  deployer.deploy(Migrations);
};