《纸上谈兵·solidity》第 1 课：部署你的第一个 Solidity 合约

$ forge init hello-world
$ cd hello-world && tree -L 1
.
├── foundry.toml    # 项目的配置入口
├── lib/            # 依赖库目录，用于存放外部依赖（比如 openzeppelin-contracts）
├── README.md       # 项目说明文档
├── script/         # 脚本目录，部署或脚本自动化代码的位置
├── src/            # 主合约目录，所有生产环境要部署的合约都应该放在这里
└── test/           # 测试目录，所有测试合约放在这里

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract HelloWorld {
    string public greet = "Hello, World!";
}

$ forge build

$ anvil

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "forge-std/Script.sol";
import "../src/HelloWorld.sol";

contract Deploy is Script {
    function run() external {
        vm.startBroadcast();
        new HelloWorld();
        vm.stopBroadcast();
    }
}

$ forge script script/HelloWorld.s.sol --rpc-url http://127.0.0.1:8545 --broadcast --private-key 0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80

$ mkdir hello-hardhat
$ cd hello-hardhat
$ npm init -y
$ npm install hardhat
$ npx hardhat

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract HelloWorld {
    string public greet = "Hello, Hardhat!";
}

$ npx hardhat compile

$ npx hardhat node

const { ethers } = require("hardhat");

async function main() {
  const Hello = await ethers.getContractFactory("HelloWorld");
  const hello = await Hello.deploy(); // Already deployed here
  await hello.deployed(); // optional, but often included to wait for deployment

  console.log("Contract deployed to:", hello.address);
}

main().catch((error) => {
  console.error(error);
  process.exitCode = 1;
});

$ npx hardhat run scripts/deploy.js --network localhost

$ npx hardhat console --network localhost

const HelloWorld = await ethers.getContractFactory("HelloWorld");
const hello = await HelloWorld.attach("部署时输出的地址");
await hello.greet();  // 应输出 "Hello, Hardhat!"