blockchain.js

const Block = require('./block')

class Blockchain {
    constructor() {
        this.blocks = [new Block()]
        this.index = 1
    }

    getLastBlock() {
        return this.blocks[this.blocks.length - 1]
    }

    addBlock(data) {
        const index = this.index
        const previousHash = this.getLastBlock().hash

        const block = new Block(index, previousHash, data)

        this.index++
        this.blocks.push(block)
    }
}

module.exports = Blockchain