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JS/nodejs version for aunyks/snakecoin.py
// JS/nodejs version for aunyks/snakecoin.py
// Original: https://gist.github.com/aunyks/8f2c2fd51cc17f342737917e1c2582e2
const sha256 = require('js-sha256');
// Define the Block Class
class Block {
constructor(index, data, previousHash) {
this.index = index;
this.timestamp = new Date();
this.data = data;
this.previousHash = previousHash;
this.hash = this.generateHash();
}
generateHash() {
return sha256.hex(`${this.index}${this.timestamp}${this.data}${this.previousHash}`);
}
}
// Create genesis block
function createGenesisBlock() {
return new Block(0, 'Genesis Block', '0');
}
// Create all other blocks
function createNextBlock(previousBlock, data=null) {
const index = previousBlock.index + 1;
const previousHash = previousBlock.hash;
return new Block(index, data, previousHash);
}
// Demo
// Create the Blockchain
const blockchain = [createGenesisBlock()];
let previousBlock = blockchain[0];
for (let i=0; i<20; i++) {
const block = createNextBlock(previousBlock);
blockchain.push(block);
previousBlock = block;
console.log(`Block #${block.index} has been added to the blockchain!.`);
console.log(`Hash: ${block.hash}\n`);
}
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