average-work.js

const Blockchain = require('./blockchain')

const blockchain = new Blockchain();

blockchain.addBlock({ data: 'initial' });

console.log('first block', blockchain.chain[blockchain.chain.length-1]);

let prevTimestamp, nextTimestamp, nextBlock, timeDiff, average;

const times = [];

for (let i=0; i<10000; i++){
    prevTimestamp = blockchain.chain[blockchain.chain.length-1].timestamp;

    blockchain.addBlock({ data: `block ${i}`});
    nextBlock = blockchain.chain[blockchain.chain.length-1]

    nextTimestamp = nextBlock.timestamp;
    timeDiff = nextTimestamp - prevTimestamp;
    times.push(timeDiff)

    average = times.reduce((total, num) => (total + num ))/times.length;

    console.log(`Time to mine block: ${timeDiff}ms. Difficulty ${nextBlock.difficulty}. Average time: ${average}ms`);
}