运行 Solidity 合约导致“ENOENT：没有这样的文件或目录”错误

Question

我正在练习在 Solidity 中编写智能合约并运行下面的代码导致 没有这样的文件或目录错误。

错误：ENOENT：没有这样的文件或目录，打开 'C:\kickstart\ethereum\build:Campaign.json'

这是一个 Kickstarter 类型的合同，有多个参与者和一个经理（合同的所有者）。用户可以捐款。经理是唯一可以提款的人，但该类型的操作需要其他用户的许可。

 **Campaign.sol**
    pragma solidity ^0.4.20;

contract CampaignFactory {
    address[] public deployedCampaigns;


    function createCampaign(uint minimum) public {
     address newCampaign = new Campaign(minimum, msg.sender);
     deployedCampaigns.push(newCampaign);
    }

    function getDeployedCampaigns() public view returns(address []) {
        return deployedCampaigns;
    }

}
contract Campaign {
    struct Request {
        string description;
        uint value;
        address recipient;
        bool complete;
        uint approvalCount;
        mapping(address => bool) approvals;
            }

Request[] public requests;
address public manager;

uint public minimumContribution;
//address[] public approvers; mapping has a constant time lookup
mapping(address => bool) public approvers;
uint public approversCount;

modifier restricted() {
    require(msg.sender == manager);
    _;
}

constructor (uint minimum, address creator) public {
    manager = creator;
    minimumContribution = minimum;
}

function contribute() public payable {
    require(msg.value > minimumContribution);

  approvers[msg.sender] = true;  
  approversCount++;

}

function createRequest(string description, uint value, address recipient) public restricted {
    Request memory newRequest = Request({
        description: description,
        value:value,
        recipient: recipient,
        complete: false,
        approvalCount:0
    });

    requests.push(newRequest);
     }

     function approveRequest(uint index) public {
         Request storage request = requests[index];

         require (approvers [msg.sender]);
         require(!request.approvals[msg.sender]);

         request.approvals[msg.sender] = true;
         request.approvalCount++;



     }

     function finalizeRequest(uint index) public restricted {
     Request storage request = requests[index];

     require(!request.complete);
     request.complete = true;

     }
 }

**compile.js**
const path = require("path");
const solc = require("solc");
//file system on local compuiter
const fs = require("fs-extra");

const buildPath = path.resolve(__dirname, "build");
// file removal in fs-extra version
fs.removeSync(buildPath);
//path to the file
const campaignPath = path.resolve(__dirname, "contracts", "Campaign.sol");
//get a content of file
const source = fs.readFileSync(campaignPath, "utf8");
// output from the compiler
const output = solc.compile(source, 1).contracts;

for (let contract in output) {
  fs.outputJsonSync(
    path.resolve(buildPath, contract + ".json"),
    output[contract]
  );
}

Answer 1

如果您更改了文件名，则需要迁移它。

npx truffle migrate --reset --compile-all

我遇到了同样的问题，这对我有用。

Answer 2

我遇到了同样的问题。问题是 Windows 不喜欢在文件名中包含特殊字符，在这种情况下是冒号“:”字符。

因此在输出结果时删除冒号，如下所示：

for (let contract in output) {
  fs.outputJSONSync(
    path.resolve(buildPath, contract.replace(':', '') + ".json"),
    output[contract]
  );
}

Answer 3

如果您想确保您的 compile.js 文件配置正确，请在 for 循环之前添加“console.log(solc.compile(source, 1));”并检查输出.

关于这个问题，你可以替换： path.resolve(buildPath, contract + '.json'), 和 path.resolve(buildPath, contract.replace(':', '') + '.json'),

希望这会有所帮助！

Answer 4

回答您的问题：Campain.json 位于构建文件夹中，包含所有 Campaign 合同实例的输出。

我能够通过执行以下步骤来修复错误：

• 彻底删除项目中的node_modules文件夹
• 运行 npm cache clean --force 命令
• 运行 npm install

请在下面找到该项目的链接： https://github.com/StephenGrider/EthereumCasts