⚠️ 本项目仅作为了解区块链及区块链入门教学使用 For educational purpose only

测试覆盖率(Test Coverage)

| File | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s | | ------------- | ------- | -------- | ------- | ------- | ----------------- | | All files | 96.15 | 88.46 | 100 | 96.05 | | blockChain.js | 96.15 | 88.46 | 100 | 96.05 | 76,133,168 |

功能(Features)

• 工作量证明机制(Proof of Work, PoF)的简单实现, A simple implementation of the Proof of Work algorithm.
• 区块链的验证, Block chain validation to prevent it from being maliciously tampered.
• Transaction 的签名. Sign transactions.
• 钱包地址生成. Wallet generation.
• 挖矿. Mining

🦊 开始 Let's get started

祝学习愉快。 Happy Learning. All the demo can be found in bilibiliDemo folder. 所有的视频里的示例都可以在 bilibiliDemo 的文件夹里找到

安装依赖(Install dependencies)

npm install --save
yarn

如果作为依赖安装, it's published to npm, so if you want to install it as an dependency, please use

npm install --save luotuocoin
or
yarn add luotuocoin

运行测试用例(Run tests)

npm run test
or
yarn test

生成一个密钥对(Generate your wallet)(bilibiliDemo/encryption/keygen.js)

密钥对讲用于发起转账，公钥（public key）会用作你的钱包地址，私钥（private key）会用来生成转账的数字签名。 The keypair will be used for signing transactions(private key) and receving miner rewards/transactions, public key will be your wallet address.

const ecLib = require("elliptic").ec;
const ec = new ecLib("secp256k1"); // curve name
const sha256 = require("crypto-js/sha256");
// 生成我们的密钥对 generate the keypair
const key = ec.genKeyPair();
// 拿到我们的私钥和公钥 希望拿到hex string格式的
console.log("private", key.getPrivate("hex"));
console.log("public", key.getPublic("hex"));

创建区块链(Create Blockchain)

const { chain, transaction } = require("luotuocoin");
const myCoin = new chain();

发起转账(Create Transaction)

利用上述步骤生成的keypair object, use the keypair object generated above

// 发起一笔转给to 10块钱的交易
// create a transaction that transfer 10 coin to address 'to'
const transaction = new Transaction(key.getPublic("hex"), "to", 10);
transaction.sign(key);
myCoin.addTransaction(transaction);

挖矿(Mine)

同样需要利用之前生成的 key object，将公钥作为参数传入挖矿的方法，如果你最后挖矿成功，区块链会向这个地址发放一个矿工奖励。 Using the same keypair object, passin the public key to receive the minder reward.

myCoin.mineTransactionPool(key.getPublic("hex"));

📽 视频教程(Video tutorial)

本项目均可在 b 站找到视频教程 我的 B 站区块链视频. 第一列视频均为理论讲解，第二列视频均为代码实现。

| 视频 1-1: 区块链概念讲解 | 视频 1-2: 简单区块链的实现 | | :----------------------------------------------------------------------------------------------------------------------------------------------------: | :-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | | | | | 视频 2-1: 工作量证明机制(pow)概念讲解 | 视频 2-2: 整合 Proof of Work 到区块链 | | | | | 视频 3-1: 数字货币是怎么产生的 | 视频 3-2: 把区块链变成数字货币 | | | | | 视频 4-1: 比特币中的数字签名是什么 | 视频 4-2: 向区块链中添加数字签名 | | | |