create-a-blockchain-and-mempool.js

'use strict';

const bcoin = require('../..');

// Default network (so we can avoid passing
// the `network` option into every object below.)
bcoin.set('regtest');

// Start up a blockchain, mempool, and miner using in-memory
// databases (stored in a red-black tree instead of on-disk).
const blocks = bcoin.blockstore.create({
  memory: true
});
const chain = new bcoin.Chain({
  network: 'regtest',
  memory: true,
  blocks: blocks
});
const mempool = new bcoin.Mempool({
  chain: chain
});
const miner = new bcoin.Miner({
  chain: chain,
  mempool: mempool,

  // Make sure miner won't block the main thread.
  useWorkers: true
});

(async () => {
  // Open the chain
  await blocks.open();
  await chain.open();

  // Open the miner (initialize the databases, etc).
  // Miner will implicitly call `open` on mempool.
  await miner.open();

  // Create a Cpu miner job
  const job = await miner.createJob();

  // run miner
  const block = await job.mineAsync();

  // Add the block to the chain
  console.log('Adding %s to the blockchain.', block.rhash());
  console.log(block);
  await chain.add(block);
  console.log('Added block!');
})().catch((err) => {
  console.error(err.stack);
  process.exit(1);
});