resolve-hypercore.js

// npm i hypercore@next hyperswarm@next random-access-memory
// Run `node resolve-hypercore.js <key you get from https://gist.github.com/Nazeh/60291b111f93928d8110ff0ae9ecea25>
const Hypercore = require('hypercore');
const Hyperswarm = require('hyperswarm');
const ram = require('random-access-memory');

const resolveCore = async (key) => {
  const core = new Hypercore(ram, key, { valueEncoding: 'json' });
  await core.ready();

  const swarm = new Hyperswarm();
  swarm.on('connection', (conn) => {
    core.replicate(conn);
  });
  swarm.join(core.discoveryKey, { client: true, server: false });

  console.time('first request resolved in');
  await swarm.flush();
  await core.update();

  // Log the latest block.
  const latest =  await core.get(core.length - 1);
  console.timeEnd('first request resolved in');
  console.log('    Latest Block:', core.length, latest)
  console.time('second request resolved in');
  const first = await core.get(0)
  console.timeEnd('second request resolved in');
  console.log('    First Block :', 0, first);

  swarm.destroy();
};

const main = async () => {
  try {
    const key = process.argv[2];
    await resolveCore(Buffer.from(key, 'hex'));
  } catch (error) {}
};

main();