Poloniex Orderbook

Module for creating and maintaining Poloniex's orderbook on server side. Starting from v3.0 I switched from pushAPI to WebScoket based API, it's made intaraction with poloniex much faster.

Installation

$ npm install poloniex-orderbook

Usage

Requires nodejs => 6.0

The central part of the lib is PoloManager. This class holds socket connection and PairMarket instances, and connects them between.

const PoloManager = require('poloniex-orderbook');
const poloman = new PoloManager();

// call connect to initiate socket connection
poloman.connect();

Now you can set event handlers:

poloman.on('change', info => { /* info = {channel, side, rate, amount}*/});
poloman.on('error', info => { /* info = {msg} */});

initiate markets:

poloman.market('BTC_ETH');

remove markets:

poloman.remove('BTC_ETH');

get access to markets orderbooks:

// take first
poloman.market('BTC_ETH').asks[0];

// top 5
poloman.market('BTC_ETH').bids.slice(0, 5);

close connection:

poloman.disconnect();

Note:

• You HAVE to set Error handler otherwise the script will throw an Error and exit if error event will occur. (see: Node.js ErrorEvents)
• For debug purposes run with DEBUG=* variable.

Example

const PoloManager = require('poloniex-orderbook');
const poloman = new PoloManager().connect();

poloman.on('error', err => console.log(err));

poloman.on('change', info => {
  const {channel, side} = info;
  const market = poloman.market(channel);
  const top5 = market[side].slice(0, 5);

  console.log(`${side.toUpperCase()} :: ${market.seq}`);
  console.log(top5);
});

poloman.market('BTC_ETC');

// 5 seconds later
setTimeout(() => {
  //poloman.disconnect();
}, 5000);

you should get the output:

ASKS :: 132227424
[ [ '0.00178668', '412.77676591' ],
  [ '0.00178684', '99.99000000' ],
  [ '0.00178685', '10.85537516' ],
  [ '0.00178700', '0.23521517' ],
  [ '0.00179312', '1156.41500000' ] ]
ASKS :: 132227424
[ [ '0.00178668', '412.77676591' ],
  [ '0.00178684', '99.99000000' ],
  [ '0.00178685', '10.85537516' ],
  [ '0.00178700', '0.23521517' ],
  [ '0.00179312', '1156.41500000' ] ]
BIDS :: 132227425
[ [ '0.00178665', '1028.38378169' ],
  [ '0.00178610', '3400.02648465' ],
  [ '0.00178600', '177.11520540' ],
  [ '0.00178278', '179.50264208' ],
  [ '0.00178277', '10.93802113' ] ]

Contacts

If you have some suggestions please email me: [email protected]