1.js

/* eslint-disable no-console */
'use strict'

const Libp2p = require('../../')
const TCP = require('libp2p-tcp')
const Mplex = require('libp2p-mplex')
const { NOISE } = require('@chainsafe/libp2p-noise')
const KadDHT = require('libp2p-kad-dht')

const delay = require('delay')

const createNode = async () => {
  const node = await Libp2p.create({
    addresses: {
      listen: ['/ip4/0.0.0.0/tcp/0']
    },
    modules: {
      transport: [TCP],
      streamMuxer: [Mplex],
      connEncryption: [NOISE],
      dht: KadDHT
    },
    config: {
      dht: {
        enabled: true
      }
    }
  })

  await node.start()
  return node
}

;(async () => {
  const [node1, node2, node3] = await Promise.all([
    createNode(),
    createNode(),
    createNode()
  ])

  await node1.peerStore.addressBook.set(node2.peerId, node2.multiaddrs)
  await node2.peerStore.addressBook.set(node3.peerId, node3.multiaddrs)

  await Promise.all([
    node1.dial(node2.peerId),
    node2.dial(node3.peerId)
  ])

  // The DHT routing tables need a moment to populate
  await delay(100)

  const peer = await node1.peerRouting.findPeer(node3.peerId)

  console.log('Found it, multiaddrs are:')
  peer.multiaddrs.forEach((ma) => console.log(`${ma.toString()}/p2p/${peer.id.toB58String()}`))
})();