peer-info

js-peer-info

Lead Maintainer

Vasco Santos

Table of Contents

• js-peer-info
  • Lead Maintainer
  • Table of Contents
  • Installation
    • npm
    • Node.JS, Browserify, Webpack
    • Browser: <script> Tag
  • Usage
  • API
    • PeerInfo.create([id])
    • new PeerInfo(id)
    • .id
    • protocols
    • .protocols.add(protocol)
    • .protocols.delete(protocol)
    • .multiaddrs
    • .multiaddrs.add(addr)
    • .multiaddrs.addSafe(addr)
    • .multiaddrs.delete(addr)
    • .multiaddrs.replace(existing, fresh)
    • .connect(ma)
    • .disconnect()
    • .isConnected()
  • Contribute
  • License

Installation

npm

> npm i peer-info

Node.JS, Browserify, Webpack

const PeerInfo = require('peer-info')

Browser: <script> Tag

Loading this module through a script tag will make the PeerInfo obj available in the global namespace.

<script src="https://unpkg.com/peer-info/dist/index.min.js"></script>
<!-- OR -->
<script src="https://unpkg.com/peer-info/dist/index.js"></script>

Usage

const PeerInfo = require('peer-info')
const peer = new PeerInfo()

// TCP port 5001
peer.multiaddrs.add('/ip4/1.2.3.4/tcp/5001')

// UDP port 8001
peer.multiaddrs.add('/ip4/1.2.3.4/udp/8001')

// mic/speaker soundwaves using frequencies 697 and 1209
peer.multiaddrs.add('/sonic/bfsk/697/1209')

API

const PeerInfo = require('peer-info')

PeerInfo.create([id])

• id optional - can be a PeerId or a JSON object(will be parsed with https://github.com/libp2p/js-peer-id#createfromjsonobj)

Creates a new PeerInfo instance and if no id is passed it generates a new underlying PeerID for it.

Returns Promise<PeerInfo>.

new PeerInfo(id)

• id: PeerId - instance of PeerId (optional)

Creates a new PeerInfo instance from an existing PeerId.

.id

The PeerId of the peer this info relates to.

protocols

A list of protocols that peer supports.

.protocols.add(protocol)

Adds a protocol that peer can support. protocol is a string.

.protocols.delete(protocol)

Removes a protocol that peer no longer supports. protocol is a string.

.multiaddrs

A list of multiaddresses instances that peer can be reached at.

.multiaddrs.add(addr)

• addr: Multiaddr

Adds a new multiaddress that peer can be reached at. addr is an instance of a multiaddr.

.multiaddrs.addSafe(addr)

• addr: Multiaddr

The addSafe call, in comparison to add, will only add the multiaddr to multiaddrs if the same multiaddr tries to be added twice.

This is a simple mechanism to prevent multiaddrs from becoming bloated with unusable addresses, which happens when we exchange observed multiaddrs with peers which will not provide a useful multiaddr to be shared to the rest of the network (e.g. a multiaddr referring to a peer inside a LAN being shared to the outside world).

.multiaddrs.delete(addr)

• addr: Multiaddr

Removes a multiaddress instance addr from peer.

.multiaddrs.replace(existing, fresh)

• existing: Multiaddr
• fresh: Multiaddr

Removes the array of multiaddresses existing from peer, and adds the array of multiaddresses fresh.

.connect(ma)

Records the given multiaddr, ma as the active multiaddr of the peer.

• ma: Multiaddr

.disconnect()

Removes the existing connected Multiaddr from tracking.

.isConnected()

Returns true if a connected Multiaddr exists, otherwise returns false.

Contribute

PRs accepted.

Small note: If editing the Readme, please conform to the standard-readme specification.

License

MIT © David Dias