Cryptix23 / price-tracker

Node.js app to track different crypto and non-crypto currencies

Description

"Price Tracker" is a Node.js app that can be used to obtain the rates of many different symbols at different exchanges. This includes normal currencies, crypto currencies, gold/silver prices, and so on.

It uses Redis for caching results, and cheerio (server-side jQuery)

Everything is accesible via both REST and WebSockets APIs.

REST API

To obtain the list of supported exchanges, and supported symbols in each exchange:

GET /request/exchanges

Example: http://localhost:5000/request/exchanges
==>
{
  "bitstamp": [
    "BTCUSD"
  ],
  "bullionvault": [
    "XAUUSD",
    "XAGUSD"
  ],
  "ambito": [
    "USDARSB",
    "USDARS"
  ],
  "coinbase": [
    "BTCUSD"
  ],
  "btc-e": [
    "BTCUSD",
    "LTCUSD"
  ],
  "virwox": [
    "BTCSLL",
    "USDSLL"
  ]
}

To obtain a particular rate:

GET /request/price/<exchange>/<symbol>  

Example: http://localhost:5000/request/price/btc-e/LTCUSD 
==>
{
  "exchange": "btc-e",
  "symbol": "LTCUSD",
  "buy": 16.773,
  "sell": 16.8,
  "retrieved_on": "2014-03-05T04:27:52.141Z",
  "updated_on": "2014-03-05T04:27:52.141Z"
}

WebSockets API

var ws = new WebSocket(host);

ws.onopen = function (event) {
    ws.send((new ExchangesRequest()).toString());
    ws.send((new PriceRequest("btc-e", "LTCUSD")).toString());
};

Live site

The application can be previewed live at http://price-tracker.herokuapp.com/