code: function sendPairingMessage(hub_host, recipient_device_pubkey, pairing_secret, reverse_pairing_secret, callbacks){
  	var body = {pairing_secret: pairing_secret, device_name: my_device_name};
  	if (reverse_pairing_secret)
  		body.reverse_pairing_secret = reverse_pairing_secret;
  	sendMessageToHub(hub_host, recipient_device_pubkey, "pairing", body, callbacks);
  }
docs: ------------------------- pairing