# 用Hardhat开发智能合约，并发布ERC20 Token By [zhongxuqi](https://paragraph.com/@zhongxuqi) · 2023-01-31 --- 1\. 安装Hardhat ------------- npm install --save-dev hardhat 2\. 初始化Hardhat工程 ---------------- 3\. 安装官方contract库 ----------------- npm install @openzeppelin/contracts 4\. 完成Token智能合约代码 ----------------- 目录`contracts/DrawToken.sol` // SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; contract DrawToken is ERC20, Ownable { constructor() ERC20("DrawToken", "DTK") {} function mint(address to, uint256 amount) public onlyOwner { _mint(to, amount); } } 5\. 完成合约部署代码 ------------ 目录`scripts/deploy.ts` import { ethers } from "hardhat"; async function main() { // DrawToken const DrawToken = await ethers.getContractFactory("DrawToken"); const drawToken = await DrawToken.deploy(); await drawToken.deployed(); console.log(`drawToken deployed to ${drawToken.address}`); } // We recommend this pattern to be able to use async/await everywhere // and properly handle errors. main().catch((error) => { console.error(error); process.exitCode = 1; }); 6\. 启动本地私有链 ----------- 7\. 部署合约 -------- npx hardhat run --network localhost scripts/deploy.ts 得到合约地址 drawToken deployed to 0x5FbDB2315678afecb367f032d93F642f64180aa3 8\. 启动nodejs，并初始化环境 ------------------- # node Welcome to Node.js v16.15.1. Type ".help" for more information. > const { ethers } = require("ethers"); undefined > const provider = new ethers.providers.JsonRpcProvider(); undefined > account1 = new ethers.Wallet('0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80',provider) Wallet { _isSigner: true, _signingKey: [Function (anonymous)], _mnemonic: [Function (anonymous)], address: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266', provider: JsonRpcProvider { _isProvider: true, _events: [], _emitted: { block: -2 }, disableCcipRead: false, formatter: Formatter { formats: [Object] }, anyNetwork: false, _networkPromise: Promise { [Object], [Symbol(async_id_symbol)]: 47, [Symbol(trigger_async_id_symbol)]: 5, [Symbol(destroyed)]: [Object] }, _maxInternalBlockNumber: -1024, _lastBlockNumber: -2, _maxFilterBlockRange: 10, _pollingInterval: 4000, _fastQueryDate: 0, connection: { url: 'http://localhost:8545' }, _nextId: 43, _eventLoopCache: { detectNetwork: null, eth_chainId: null }, _network: { chainId: 31337, name: 'unknown' } } } 9\. 初始化contract --------------- > abi = [{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}] ... > contract = new ethers.Contract('0x5FbDB2315678afecb367f032d93F642f64180aa3',abi,account1) ... 调用合约基本方法 > await contract.name() 'DrawToken' > await contract.symbol() 'DTK' 10\. mint出token --------------- > contractWithSigner = contract.connect(account1) ... > contractWithSigner.mint(await account1.getAddress(),100) { type: 2, chainId: 31337, nonce: 2, maxPriorityFeePerGas: BigNumber { _hex: '0x59682f00', _isBigNumber: true }, maxFeePerGas: BigNumber { _hex: '0xb5f20e1e', _isBigNumber: true }, gasPrice: null, gasLimit: BigNumber { _hex: '0x0116e2', _isBigNumber: true }, to: '0x5FbDB2315678afecb367f032d93F642f64180aa3', value: BigNumber { _hex: '0x00', _isBigNumber: true }, data: '0x40c10f19000000000000000000000000f39fd6e51aad88f6f4ce6ab8827279cfffb922660000000000000000000000000000000000000000000000000000000000000064', accessList: [], hash: '0x3e0a661dc1656fc7d3be8033f2f6fd4ceec8b05ac328c37fb1769d813a1c8524', v: 1, r: '0xff8f32375fcc5fb3d31634a5b604c8bc4d975b1b694611a4323609d990f944b0', s: '0x14a5b08e8afd9686c1c89962f490a82836dd8aa95cd6c9adcb611596cbc46c91', from: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266', confirmations: 0, wait: [Function (anonymous)] } 查询是否mint成功 > balance = await contractWithSigner.balanceOf(await account1.getAddress()) BigNumber { _hex: '0x64', _isBigNumber: true } > balance.toString() '100' 11\. 发送Token ------------ > account2 = new ethers.Wallet('0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d',provider) ... > contractWithSigner.transfer(await account2.getAddress(), 50) { type: 2, chainId: 31337, nonce: 3, maxPriorityFeePerGas: BigNumber { _hex: '0x59682f00', _isBigNumber: true }, maxFeePerGas: BigNumber { _hex: '0xac5e7c24', _isBigNumber: true }, gasPrice: null, gasLimit: BigNumber { _hex: '0xcc41', _isBigNumber: true }, to: '0x5FbDB2315678afecb367f032d93F642f64180aa3', value: BigNumber { _hex: '0x00', _isBigNumber: true }, data: '0xa9059cbb00000000000000000000000070997970c51812dc3a010c7d01b50e0d17dc79c80000000000000000000000000000000000000000000000000000000000000032', accessList: [], hash: '0xe0d69fe8dbffbb507090d6bc62c4f9127d88b9f747c466fd5a8df8cd5e60690c', v: 0, r: '0xed8ebd334cf1996a9e3021866aca03c50bf98ffbbbd4dccb15352baabc0c0b02', s: '0x706acb4a6f768c095d3ac56f51dd2c4502da8236f52c39137891250ddab5de8c', from: '0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266', confirmations: 0, wait: [Function (anonymous)] } 查看Token是否发送成功 > (await contractWithSigner.balanceOf(await account2.getAddress())).toString() '50' > (await contractWithSigner.balanceOf(await account1.getAddress())).toString() '50' --- *Originally published on [zhongxuqi](https://paragraph.com/@zhongxuqi/hardhat-erc20-token)*