node-blockchain-js/lib/CryptoBlock.js

Simple implementation of Crypto Blockchain using Node.js

const SHA256 = require('crypto-js/sha256');

class CryptoBlock{
    constructor(data, previousHash=" "){
     this.index = null
     this.timestamp = Date.now();
     this.data = data;
     this.previousHash = previousHash;
     this.hash = null;     
    }
    computeHash(){

        if(this.index !=  null && !this.hash){
            this.hash = SHA256(this.index + this.previousHash + this.timestamp + JSON.stringify(this.data)).toString();
        }
    }   
}

module.exports = CryptoBlock;