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。经理是唯一能够提取资金的人,但该类型的行动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]
);
}
回答你的问题:Campain.json位于build文件夹中,包含Campaign合约所有实例的输出。
我能够通过执行以下步骤来修复错误:
如果要确保正确配置了compile.js文件,请添加“console.log(solc.compile(source,1));”在for循环之前检查输出。
关于这个问题,您可以使用path.resolve(build Path,contract.replace(':','')+'。json')替换:path.resolve(build Path,contract +'。json'),
希望这可以帮助 !
我遇到了同样的问题。问题是Windows不满意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]
);
}