js-libp2p/examples/chat/src/dialer.js

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

const PeerId = require('peer-id')
const PeerInfo = require('peer-info')
const Node = require('./libp2p-bundle')
const { stdinToStream, streamToConsole } = require('./stream')

async function run() {
  const [idDialer, idListener] = await Promise.all([
    PeerId.createFromJSON(require('./peer-id-dialer')),
    PeerId.createFromJSON(require('./peer-id-listener'))
  ])

  // Create a new libp2p node on localhost with a randomly chosen port
  const peerDialer = new PeerInfo(idDialer)
  peerDialer.multiaddrs.add('/ip4/0.0.0.0/tcp/0')
  const nodeDialer = new Node({
    peerInfo: peerDialer
  })

  // Create a PeerInfo with the listening peer's address
  const peerListener = new PeerInfo(idListener)
  peerListener.multiaddrs.add('/ip4/127.0.0.1/tcp/10333')

  // Start the libp2p host
  await nodeDialer.start()

  // Output this node's address
  console.log('Dialer ready, listening on:')
  peerListener.multiaddrs.forEach((ma) => {
    console.log(ma.toString() + '/p2p/' + idListener.toB58String())
  })

  // Dial to the remote peer (the "listener")
  const { stream } = await nodeDialer.dialProtocol(peerListener, '/chat/1.0.0')

  console.log('Dialer dialed to listener on protocol: /chat/1.0.0')
  console.log('Type a message and see what happens')

  // Send stdin to the stream
  stdinToStream(stream)
  // Read the stream and output to console
  streamToConsole(stream)
}

run()