一个简单的Javascript区块链。仅用于教育目的。.zip

<p align="center"> <a href="" rel="noopener"> <img width=200px height=200px src="https://i.imgur.com/VELRxXl.png" alt="Project logo"></a> </p> <h3 align="center">SavjeeCoin</h3> <div align="center"> [](https://github.com/Savjee/SavjeeCoin/actions/workflows/ci.yml) [](https://coveralls.io/github/Savjee/SavjeeCoin?branch=master) [](https://github.com/Savjee/SavjeeCoin/issues) [](https://github.com/Savjee/SavjeeCoin/pulls) [](/LICENSE) </div> --- *⚠️ For education purposes only. This is by no means a complete implementation and it is by no means secure!* ## Features * Simple proof-of-work algorithm * Verify blockchain (to prevent tampering) * Generate wallet (private/public key) * Sign transactions ## 🏁 Getting Started <a name = "getting_started"></a> ### Install library ``` npm install --save savjeecoin ``` ### Generate a keypair To make transactions on this blockchain you need a keypair. The public key becomes your wallet address and the private key is used to sign transactions. ```js const EC = require('elliptic').ec; const ec = new EC('secp256k1'); const myKey = ec.genKeyPair(); ``` The `myKey` object now contains your public & private key: ```js console.log('Public key:', myKey.getPublic('hex')); console.log('Private key:', myKey.getPrivate('hex')); ``` ### Create a blockchain instance Now you can create a new instance of a Blockchain: ```js const {Blockchain, Transaction} = require('savjeecoin'); const myChain = new Blockchain(); ``` ### Adding transactions ```js // Transfer 100 coins from my wallet to "toAddress" const tx = new Transaction(myKey.getPublic('hex'), 'toAddress', 100); tx.sign(myKey); myChain.addTransaction(tx); ``` To finalize this transaction, we have to mine a new block. We give this method our wallet address because we will receive a mining reward: ```js myChain.minePendingTransactions(myKey.getPublic('hex')); ``` --- ## 📽 Video tutorial This source code comes from [my video series on YouTube](https://www.youtube.com/watch?v=zVqczFZr124&list=PLzvRQMJ9HDiTqZmbtFisdXFxul5k0F-Q4). You can check them here: | Video 1: Simple implementation | Video 2: Adding Proof-of-work | :-------------------------:|:-------------------------: [](https://www.youtube.com/watch?v=zVqczFZr124) | [](https://www.youtube.com/watch?v=HneatE69814) | Video 3: Mining rewards & transactions | Video 4: Signing transactions | [](https://www.youtube.com/watch?v=fRV6cGXVQ4I) | [](https://www.youtube.com/watch?v=kWQ84S13-hw) | Video 5: Building a front-end in Angular [](https://www.youtube.com/watch?v=AQV0WNpE_3g) |