Question

我正在练习用Solidity编写智能合约，并在下面的结果中运行以下代码没有此类文件或目录错误。

错误：ENOENT：没有此类文件或目录，请打开“ C：\ kickstart \ ethereum \ build：Campaign.json”

这是一个Kickstarter类型的合约，有多个参与者和一个经理（合约的所有者）。用户能够捐款。经理是唯一能够提取资金的人，但是这种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

回答您的问题：Campain.json位于build文件夹中，其中包含Campaign合同的所有实例的输出。

我能够通过执行以下步骤来纠正错误：

完全删除项目中的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

Answer 2

如果要确保正确配置了compile.js文件，请在for循环之前添加“ console.log（solc.compile（source，1））; ”并检查输出

关于此问题，您可以替换： path.resolve（buildPath，contract +'.json'），与 path.resolve（buildPath，contract.replace（'：'，''）+'.json'），

希望这会有所帮助！

Answer 3

我遇到了同样的问题。问题在于Windows对文件名中包含特殊字符（在这种情况下为冒号“：”字符）感到不满意。

这样，当您按如下所示输出结果时，请删除冒号：

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

运行Solidity合同会导致“ ENOENT：无此类文件或目录”错误

3 个答案: