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合约编译部署基本流程

项目参考

https://github.com/Dapp-Learning-DAO/Dapp-Learning/blob/main/basic/01-web3js-deploy/README-cn.md

准备Infura Project

https://developer.metamask.io/

本项目发送交易到 Infura , 需要创建相应的 Infura Project, 可以获取相应的PROJECT ID。

注册登录，完成步骤。
点击设置看到api，就是需要的项目id。

下面需要勾选以太坊的测试网络。

准备私钥

在MetaMask的账户详情中可以显示私钥。

准备测试币

准备测试币。可参考上一篇

准备项目

替换准备的私钥和项目id。

执行项目

node index.js

然后查看infura，发现会有请求。

部署成功会显示合约地址，根据合约地址可以在以太坊测试网络上查看到相应的信息。

详细

合约

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;contract Incrementer {uint256 public number;constructor(uint256 _initialNumber) {number = _initialNumber;}function increment(uint256 _value) public {number = number + _value;}function reset() public {number = 0;}function getNumber() public view returns (uint256) {return number;}
}

index.js

let { Web3 } = require('web3');
let solc = require('solc');
let fs = require('fs');// Get privatekey from environment
require('dotenv').config();
let privatekey = process.env.PRIVATE_KEY;
console.log("privatekey:", privatekey);
if (privatekey.slice(0, 2) !== '0x') privatekey = '0x' + privatekey;// Load contract
const source = fs.readFileSync('Incrementer.sol', 'utf8');// compile solidity
const input = {language: 'Solidity',sources: {'Incrementer.sol': {content: source,},},settings: {outputSelection: {'*': {'*': ['*'],},},},
};const compiledCode = JSON.parse(solc.compile(JSON.stringify(input)));
const contractFile = compiledCode.contracts['Incrementer.sol']['Incrementer'];// Get bin & abi
const bytecode = contractFile.evm.bytecode.object;
const abi = contractFile.abi;// Create web3 with sepolia provider，you can change sepolia to other testnet
const web3 = new Web3('https://sepolia.infura.io/v3/' + process.env.INFURA_ID);// Create account from privatekey
const accounts = web3.eth.accounts.wallet.add(privatekey);/*-- Deploy Contract --
*/
const Deploy = async () => {// Create contract instanceconst deployContract = new web3.eth.Contract(abi);// Create Txconst deployTx = deployContract.deploy({data: '0x' + bytecode,arguments: [0], // Pass arguments to the contract constructor on deployment(_initialNumber in Incremental.sol)});// optionally, estimate the gas that will be used for development and log itconst gas = await deployTx.estimateGas({from: accounts,});console.log('estimated gas:', gas);try {// Deploy the contract to the Ganache network// Your deployed contrac can be viewed at: https://sepolia.etherscan.io/address/${tx.options.address}// You can change sepolia in above url to your selected testnet.const tx = await deployTx.send({from: accounts[0].address,gas,// gasPrice: 10000000000,});console.log('Contract deployed at address: ' + tx.options.address);} catch (error) {console.error(error);}
};// We recommend this pattern to be able to use async/await everywhere
// and properly handle errors.
Deploy().then(() => process.exit(0)).catch((error) => {console.error(error);process.exit(1);});

package.json

{"name": "Example01-deploy-contract","version": "1.0.0","description": "","main": "index.js","scripts": {"test": "echo \"Error: no test specified\" && exit 1"},"author": "","license": "ISC","dependencies": {"dotenv": "^16.3.1","solc": "0.8.0","web3": "^4.0.3"}
}