mine.js

const Block = require('./models/Block');
const Transaction = require('./models/Transaction');
const UTXO = require('./models/UTXO');
const db = require('./db');
const {PUBLIC_KEY} = require('./config');
const TARGET_DIFFICULTY = BigInt("0x0" + "F".repeat(63));
const BLOCK_REWARD = 10;

//Auto Mining off.
let mining = false;
// mine();

function startMining() {
  mining = true;
  mine();
}

function stopMining() {
  mining = false;
}

function mine() {
  if(!mining) return;

  const block = new Block();
  // Dan's Todo: add transactions from the mempool

  const coinbaseUTXO = new UTXO(PUBLIC_KEY, BLOCK_REWARD);
  const coinbaseTX = new Transaction([], [coinbaseUTXO]);
  block.addTransaction(coinbaseTX);

  while(BigInt('0x' + block.hash()) >= TARGET_DIFFICULTY) {
    block.nonce++;
  }

  block.execute();

  db.blockchain.addBlock(block);

  console.log(`Mined block #${db.blockchain.blockHeight()} with a hash of ${block.hash()} at nonce ${block.nonce}`);

  setTimeout(mine, 2500);
}

module.exports = {
  startMining,
  stopMining,
};