js-libp2p/examples/peer-and-content-routing/1.js

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

const Libp2p = require('../../')
const TCP = require('libp2p-tcp')
const Mplex = require('libp2p-mplex')
const SECIO = require('libp2p-secio')
const PeerInfo = require('peer-info')
const KadDHT = require('libp2p-kad-dht')

const delay = require('delay')

const createNode = async () => {
  const peerInfo = await PeerInfo.create()
  peerInfo.multiaddrs.add('/ip4/0.0.0.0/tcp/0')

  const node = await Libp2p.create({
    peerInfo,
    modules: {
      transport: [TCP],
      streamMuxer: [Mplex],
      connEncryption: [SECIO],
      dht: KadDHT
    },
    config: {
      dht: {
        enabled: true
      }
    }
  })

  await node.start()
  return node
}

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

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

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

  const peer = await node1.peerRouting.findPeer(node3.peerInfo.id)

  console.log('Found it, multiaddrs are:')
  peer.multiaddrs.forEach((ma) => console.log(ma.toString()))
})();