A PoW blockchain written in 60 lines of Javascript

JeChain is a proof-of-work blockchain created using Javascript in just 60 lines of code.

JeChain was created for educational purposes, so you can learn the basics of blockchains through JeChain.

No, proof-of-work is extremely outdated, JeChain is slow as well since it's written in Javascript, and the thing has no modern feature you would expect from a blockchain platform. It should only stay as an educational project.

1. Create an entry file (index.js for example)

2. Here are some features of JeChain, read the usage and start coding:

const { Block, Blockchain, JeChain } = require("./jechain.js");
// Block is a class for creating blocks.
// Blockchain is the blockchain class, which means you can inherit this class and upgrade JeChain if you want.
// JeChain is a "Blockchain" object, which is ready to use.

// JeChain.chain // The whole chain
// JeChain.difficulty // The difficulty
// JeChain.getLastBlock() // The latest block
// JeChain.isValid() // "true" if chain is valid, "false" otherwise.
// new Block(timestamp /*string - "optional"*/, data /*array - "optional"*/) // Creates a new "Block" object.
// JeChain.addBlock(block) // Mines the block and add the block to the chain.

// A transaction example:
JeChain.addBlock(new Block(Date.now().toString(), [{ from: "nguyenphuminh", to: "girlfriend", amount: 100 }]));
// Note that this is only an example, transactions often need more steps before being pushed to the chain.

JeChain is actually used as a tutorial on dev.to - Creating a blockchain in 60 lines of Javascript

This is actually based on a blockchain that I created a while ago while learning from Simply Explained, so be sure to check them out on Youtube.

If you like JeChain and my article at dev.to, please buy me a cup of coffee through sending me some coins. My BEP-20 address is 0x1848Ba922d6eD66D4910176998fF4fa77AEb82D5.

Copyrights (c) 2021 Nguyen Phu Minh.

This project is licensed under the MIT License.