4.0 Harthat开发框架（JavaScript）
4.1 Harthat编译
npx hardhat compile
4.2 Harthat部署
npx hardhat deploy
类似webpack入口文件实现合约部署
const { ethers } = require("hardhat");
async function main() {
const fundMeFactory = await ethers.getContractFactory("FundMe1");//传入的文件名字是contract文件夹下的合约的名字
console.log("Deploying FundMe contract...");
//console.log(ethers);
// Deploy the contract
const fundMe = await fundMeFactory.deploy(10);//这个时候调用fundMe.sol合约的constructor函数
await fundMe.waitForDeployment();
console.log("FundMe contract deployed to:", await fundMe.getAddress());
}
// Execute the main function and handle errors
main().then(() => process.exit(0))
.catch((error) => {
console.error("Error deploying FundMe contract:", error);
process.exit(1);
});
大概最终版本
const { ethers } = require("hardhat");
//const hre = require("hardhat")
async function main() {
const fundMeFactory = await ethers.getContractFactory("FundMe");//传入的文件名字是contract文件夹下的合约的名字
console.log("Deploying FundMe contract...");
//console.log(ethers);
// Deploy the contract
const fundMe = await fundMeFactory.deploy(10);//这个时候调用fundMe.sol合约的constructor函数
await fundMe.waitForDeployment();
console.log("FundMe contract deployed to:", await fundMe.getAddress());
/*
//hre.network.chainId获取到的是hardhat.config.ts里面的config属性下边自己配置的network属性，这个属于配置一些测试网的信息
if(hre.network.chainId = 11155111){
//等待五个区块确认
await fundMe.deployTransaction().wait(5);
console.log("Waiting for 5 blocks confirmation...");
//验证sepolia地址
await verifyFundMe(fundMe,10)
}else{
console.log("verification skipped...")
}
*/
}
//if you want to verify the cantract on etherscan,you can use the following function
// async function verifyFundMe(fundMe:any,arg:number){
// await hre.run("verfy:verify",{
// address: fundMe.target,
// constructorArguments:[arg]
// })
// }
// Execute the main function and handle errors
main().then(() => process.exit(0))
.catch((error) => {
console.error("Error deploying FundMe contract:", error);
process.exit(1);
});
4.3 Ether.js
The ethers.js library aims to be a complete and compact library for interacting with the Ethereum Blockchain and its ecosystem.
是一个用于以太坊区块链交互的JavaScript API库
文档链接：
4.4 Hardhat网络&私钥配置
使用 @chainLink/env-enc加密私钥
安装 @chainLink/env-enc
npm install @chainLink/env-enc --save-dev
加密命令
//设置密码
npx env-enc set-pw
//加密
npx env-enc set
4.4.1 配置sepolia测试网
在hardhat.config.ts配置sepolia（一定要在当前的命令行窗口执行命令才会获取到SEPOLIA_URL,PRIVATE_KEY）否则需要执行npx env-enc set-pw后重新在输入密码，不然取到的值就是undefined
import { HardhatUserConfig } from "hardhat/config";
import "@nomicfoundation/hardhat-toolbox";
/* import envEnc from "@chainLink/env-enc";
console.log("env_enc", envEnc); */
require("@chainLink/env-enc").config();
const {SEPOLIA_URL,PRIVATE_KEY} = process.env;
const config: HardhatUserConfig = {
solidity: "0.8.28",
networks: {
sepolia:{
url:SEPOLIA_URL,
accounts:[PRIVATE_KEY as `string`],
}
}
};
export default config;
4.4.2 验证etherscan的sepolia地址
参考hardhat-verify | Ethereum development environment for professionals by Nomic Foundation
略第四课1：50：00
4.5 简单的合约交互脚本
// init 2 account
//ethers.js提供的方法，可以获取配置文件配置的两个account
const [firstAccount,secondAccount] = ethers.getSigners()
//fund contract with first account
//语法：合约.fund方法({value:ethers.parseEther("0.5")}) 因为0.5是小数，需要ether来转化
const tranxt = await fundMe.fund({value:ethers.parseEther("0.5")})//等待调用fundMe里面的fund函数完成
await tranxt.wait();//等待交易完成，已经写入区块
//check balance of contract
const balanceOfContract = await ethers.provider.getBalance(fundMe.getAddress())//ethers.provider.getBalance(fundMe.target)
console.log(`balance of contract is ${balanceOfContract}`)
//fund contract with second account
//.connect(secondAccount)用于指明是哪个账户，不写默认第一个
const tranxtSecondAccount = await fundMe.connect(secondAccount).fund({value:ethers.parseEther("0.6")})//调用fund
await tranxtSecondAccount.wait()//等待入块
//check balance of contract
const balanceOfContractWithSecondAccount = await ethers.provider.getBalance(fundMe.getAddress())//ethers.provider.getBalance(fundMe.target)
console.log(`balance of contract is ${balanceOfContractWithSecondAccount}`)
//check mapping fundersToAccount
//firstAccount是fundMe里面的mapping结构，查询账户交的钱
const firstAccountBalanceInFundMe = await fundMe.fundersToAcount[firstAccount.address]
const secondAccountBalanceInFundMe = await fundMe.fundersToAcount[secondAccount.address]
console.log(`balance of first account ${firstAccount.address} is ${firstAccountBalanceInFundMe}`)
console.log(`balance of first account ${secondAccount.address} is ${secondAccountBalanceInFundMe}`)
4.6 Hardhat Task
类似模块化：可以将脚本变成命令行
deploy-fundMe：
import { task } from "hardhat/config"
//async (args(入参), hre（运行时候的环境）)={}
task("deploy-fundMe（命令的名字）", "Deploy FundMe contract(描述)").setAction(async (args, hre) => {
const fundMeFactory = await ethers.getContractFactory("FundMe");//传入的文件名字是contract文件夹下的合约的名字
console.log("Deploying FundMe contract...");
//console.log(ethers);
// Deploy the contract
const fundMe = await fundMeFactory.deploy(300);//这个时候调用fundMe.sol合约的constructor函数
await fundMe.waitForDeployment();
console.log("FundMe contract deployed to:", await fundMe.getAddress());
/*
if(hre.network.chainId = 11155111){
//等待五个区块确认
await fundMe.deployTransaction().wait(5);
console.log("Waiting for 5 blocks confirmation...");
//验证sepolia地址
await verifyFundMe(fundMe,10)
}else{
console.log("verification skipped...")
}
*/
})
//if you want to verify the cantract on etherscan,you can use the following function
// async function verifyFundMe(fundMe:any,arg:number){
// await hre.run("verfy:verify",{
// address: fundMe.target,
// constructorArguments:[arg]
// })
// }
module.exports = {}
以上命令行使用：
npx hardhat deploy-fundMe --network sepolia
interact-fundMe：
import {task} from "hardhat/config";
task("interact-fundMe", "Interact with FundMe contract").addParam("addr","contract address").setAction(async (args, hre) => {
const fundMeFactory = await ethers.getContractFactory("FundMe")
const fundMe = await fundMeFactory.attach(args.addr)//传入合约地址，连接到合约
//简单的合约交互
// init 2 account
//ethers.js提供的方法，可以获取配置文件配置的两个account
const [firstAccount,secondAccount] = ethers.getSigners()
//使用本地的account
/* const firstAccount = await ethers.getSigner(0)//获取第一个账户
const secondAccount = await ethers.getSigner(1)//获取第二个账户 */
//fund contract with first account
//语法：合约.fund方法({value:ethers.parseEther("0.5")}) 因为0.5是小数，需要ether来转化
const tranxt = await fundMe.fund({value:ethers.parseEther("0.5")})//等待调用fundMe里面的fund函数完成
await tranxt.wait();//等待交易完成，已经写入区块
//check balance of contract
const balanceOfContract = await ethers.provider.getBalance(fundMe.getAddress())//ethers.provider.getBalance(fundMe.target)
console.log(`balance of contract is ${balanceOfContract}`)
//fund contract with second account
//.connect(secondAccount)用于指明是哪个账户，不写默认第一个
const tranxtSecondAccount = await fundMe.connect(secondAccount).fund({value:ethers.parseEther("0.6")})//调用fund
await tranxtSecondAccount.wait()//等待入块
//check balance of contract
const balanceOfContractWithSecondAccount = await ethers.provider.getBalance(fundMe.getAddress())//ethers.provider.getBalance(fundMe.target)
console.log(`balance of contract is ${balanceOfContractWithSecondAccount}`)
//check mapping fundersToAccount
//firstAccount是fundMe里面的mapping结构，查询账户交的钱
const firstAccountBalanceInFundMe = await fundMe.fundersToAcount[firstAccount.address]
const secondAccountBalanceInFundMe = await fundMe.fundersToAcount[secondAccount.address]
console.log(`balance of first account ${firstAccount.address} is ${firstAccountBalanceInFundMe}`)
console.log(`balance of first account ${secondAccount.address} is ${secondAccountBalanceInFundMe}`)
})
以上命令行使用：
npx hardhat interact-fundMe --addr 部署的地址 --network sepolia
上面命令行的部署的地址会通过args传入。
