coins-ph-rate.js

gistfile1.txt

// ==UserScript==
// @name         coinsph rate info
// @namespace    http://your.homepage/
// @version      0.1
// @description  enter something useful
// @author       Ken Marfilla
// @match        http://stackoverflow.com/questions/5258989/manually-adding-a-userscript-to-google-chrome
// @include      https://coins.ph/*
// @grant        none
// ==/UserScript==



(function() {
    function fmt (n, p) {
        return parseFloat(Math.round(n * 100) / 100).toFixed(p || 2);
    }
    
    function Row(indicator, bid, ask, unit, precision) {
      this.indicator = indicator;
      this.bid = fmt(bid, precision) + ' ' + unit;
      this.ask = fmt(ask, precision) + ' ' + unit;
      
    }

    function updateQuote() {
        Promise.all([
          fetch('https://api.bitcoinaverage.com/ticker/global/USD/'),
          fetch('/api/v1/quote'),
          fetch('https://openexchangerates.org/api/latest.json?app_id=cf7a993d922c459b812cd49d7a4f0d84')
        ]).then(function(responses) {
          Promise.all([].map.call(responses, function(response) {
              return response.json();
          })).then(function(jsons) {
            console.table([
                new Row('coinsph', jsons[1].quote.bid, jsons[1].quote.ask, 'PHP'),
                new Row('average', jsons[0].bid*jsons[2].rates.PHP, jsons[0].ask*jsons[2].rates.PHP, 'PHP'),
                new Row('spread (+1%ask)',
                  jsons[0].bid*jsons[2].rates.PHP - jsons[1].quote.bid,
                  jsons[1].quote.ask - jsons[0].ask*jsons[2].rates.PHP + (0.01*jsons[1].quote.ask),
                  'PHP'),
              
                new Row('coinsph', jsons[1].quote.bid/jsons[2].rates.PHP, jsons[1].quote.ask/jsons[2].rates.PHP, 'USD'),
                new Row('average', jsons[0].bid, jsons[0].ask, 'USD'),
                
                new Row('spread (+1%ask)',
                  jsons[0].bid - jsons[1].quote.bid/jsons[2].rates.PHP,
                  jsons[1].quote.ask/jsons[2].rates.PHP - jsons[0].ask + (0.01*jsons[1].quote.ask/jsons[2].rates.PHP),
                  'USD'),
                
                
            ]);
            
          });
        });
    }
    
    updateQuote();

})();