1 初始化项目及依赖
mkdir hardhat-sol-demo
cd hardhat-sol-demo
yarn init -y
yarn add -D hardhat
yarn add -D @nomiclabs/hardhat-ethers ethers @nomiclabs/hardhat-waffle ethereum-waffle chai
yarn add -D ts-node typescript
yarn add -D chai @types/node @types/mocha @types/chai
yarn add -D hardhat-abi-exporter
yarn add -D hardhat-contract-sizer
yarn add -D hardhat-gas-reporter
2 hardhat 初始化
npx hardhat
选择 Create an empty hardhat.config.js 创建空的配置
image.png
修改 hardhat.config.js => hardhat.config.ts
编辑 hardhat.config.ts
/** @type import('hardhat/config').HardhatUserConfig */
import "@nomiclabs/hardhat-waffle"
import "@nomiclabs/hardhat-ethers"
import "hardhat-abi-exporter";
import "hardhat-gas-reporter";
import "hardhat-contract-sizer";
module.exports = {
solidity: "0.8.17",
networks: {
// bsctest
bsctestnet: {
url: 'https://data-seed-prebsc-1-s1.binance.org:8545/',
gasPrice: 20000000000,
gas: 4100000,
chainId: 97,
accounts: ['bscnst 链账户密钥'],
}
},
gasReporter: {
enabled: true,
showMethodSig: true,
maxMethodDiff: 10,
currency: 'USD',
gasPrice: 127,
},
contractSizer: {
alphaSort: true,
runOnCompile: true,
disambiguatePaths: false,
},
paths: {
sources: "./contracts",
tests: "./test",
cache: "./cache",
artifacts: "./artifacts"
},
abiExporter: {
path: './abi',
runOnCompile: true,
clear: true,
spacing: 2
}
};
建立合约文件夹
mkdir contracts
编写合约 contracts/Demo.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract Demo {
uint256 private _number;
// 记录 number 变化log
event IncrNumberEvent(uint256 oldNumber, uint256 newNumber);
// 增加 number 值
function IncrNumber(uint256 number) public {
uint256 oldNumber = _number;
_number = oldNumber + number;
emit IncrNumberEvent(oldNumber, _number);
}
// 获取 number 值
function GetBumber() public view returns (uint256) {
return _number;
}
}
测试合约
新增 test 文件夹
mkdir test
编写测试脚本 test/Demo.ts
import { ethers } from "hardhat";
import { expect } from "chai";
describe("Demo", () => {
let demo
// 部署合约 默认部署环境为 hardhat 提供
before(async () => {
const Demo = await ethers.getContractFactory("Demo")
const deploy = await Demo.deploy()
demo = await deploy.deployed()
})
it("incr", async () => {
// 调用合约
await demo.IncrNumber(10)
// 获取合约值，理论上第一次调用结果集为10
expect((await demo.GetNumber())).to.equals(10)
})
})
执行测试命令
npx hardhat test
出现如下图，说明编写合约已成功
image.png
编译成功的 abi 资源将在 abi 文件夹显示
image.png
在 bscnet（币安智能链测试网） 上部署合约
新建 scripts 存放部署文件
mkdir scripts
新建 scripts/Demo.ts
import { ethers } from "hardhat"
async function deploy() {
const Demo = await ethers.getContractFactory("Demo")
const demo = await Demo.deploy()
return await demo.deployed()
}
async function getNumber(demo) {
// 合约地址
console.log("contract address:", demo.address)
// 调用合约增加 number
const result = await demo.IncrNumber(10)
console.log("hash:", result.hash)
}
deploy().then(getNumber)
执行部署合约命令
bsctestnet 为 hardhat.config.ts networks数据结构下配置
npx hardhat run scripts/Demo.ts --network bsctestnet
部署结果
image.png
调用合约设置 number 交易hash:0x8a41057b742ae6b5dbe698656cd07f94e0325c3cdf903cc1825624d509fc08c1
image.png
查看当前 number 数值
进入 hardhat 控制台操作端
npx hardhat console --network bsctestnet
获取当前 number 数值
0xAc0857F6C80bCD85493c6d001C49246419810cfF 为合约地址
> const Demo = await ethers.getContractFactory("Demo");
undefined
> const demo = Demo.attach("0xAc0857F6C80bCD85493c6d001C49246419810cfF")
undefined
> await demo.GetNumber()
BigNumber { value: "10" }
如下图所示：结果与预期一致。
image.png
