Also works in the browser with browserify!

This module is used by WebTorrent.

npm install bittorrent-peerid

import peerid from 'bittorrent-peerid'
const parsed = peerid('-AZ2200-6wfG2wk6wWLc')

console.log(parsed.client, parsed.version)

The parsed peerid object looks like this:

{
  client: 'Vuze',
  version: '2.2.0.0'
}

bittorrent-peerid can parse peer ids encoded in the following formats:

• a 20-byte Buffer
• a 40-character hex string
• an arbitrarily-sized human-readable utf8 string (must decode to a 20-byte Buffer)

If an unknown peer id is passed in, the returned client will be unknown.

• Support known Azureus-style clients.
• Support known Shadow-style clients.
• Support known Mainline-style clients.
• Support known Custom-style clients.
• Recognize BitComet/Lord/Spirit spoofing.
• Full support for client version parsing.
• Full support for customized client version schemes.
• Support unknown clients that conform to either the Azureus or Shadow-style conventions.

This module is based heavily on the BTPeerIDByteDecoderDefinitions class from Azureus (Vuze). Related resources include:

• BitTorrent Specification
• Transmission
• g3peerid
• Shareaza
• libtorrent

MIT. Copyright (c) Travis Fischer and WebTorrent, LLC.