Simple trade notification for Cryptopia.

cryptopia_notify.js

// This script will monitor your trades on Cryptopia.
// You'll get alerted (in Terminal and via voice prompt) when a new trade is executed.

// Save locally, add your api key, and run with "node <script name>" in Terminal.

// If you don't have node installed 
// - on Mac (assuming Homebrew installed): brew install node 
// - on Windows: http://blog.teamtreehouse.com/install-node-js-npm-windows

// Install other packages used:
// npm i requirejs cryptopia-api say dateformat

const Cryptopia = require('cryptopia-api')();
const options = {
  API_KEY: 'your_api_key',
  API_SECRET: 'your_secret_key',
  HOST_URL: 'https://www.cryptopia.co.nz/api'
};
Cryptopia.setOptions(options);

const say = require('say');
const df = require('dateformat');

var tradeHistory0 = [];

var frequency = 60*1000;

var openOrders = async function () {
    try {
        var response = await Cryptopia.getTradeHistory({Count: 3});
        var tradeHistory = response['Data'];
        // console.log(tradeHistory); //Array of available Trade History for Market from API

        console.log(df(new Date(), 'HH:MM:ss.l'));
        var diff = tradeHistory.diff(tradeHistory0);
        if (diff.length > 0) {
            say.speak('crib toepia trade executed');
            console.log(diff);
            tradeHistory0 = tradeHistory
        }
    } catch (err) {
        console.error(err);
    }
    // call itself again with frequency delay
    setTimeout(openOrders, frequency);
}
openOrders();


// util function to get diff between 2 arrays
Array.prototype.diff = function(otherArray) {
    function comparer(otherArray){
      return function(current){
        return otherArray.filter(function(other){
          return other.TradeId == current.TradeId
        }).length == 0;
      }
    }

    return this.filter(comparer(otherArray));
};