Introduction

CoinTools is A Chrome Extension that has a few useful tools and graphs for Cryptocurrency.

Previous Contributions

• v0.0.2 Cryptocurrency Conversion + UI Localization
• v0.0.1 Introduction to CoinTools! A Cryptocurrency Chrome Extension

Technology Stacks

Javascript that runs in Chrome.

Github

https://github.com/DoctorLai/CoinTools

Chrome Webstore

It is available online at Chrome Webstore:
https://chrome.google.com/webstore/detail/coin-tools/fmglcggbdcbkpkfapngjobfeakehpcgj

v0.0.3 Feature

Along with bug fixes and code refactoring, this version has the following features:

1. Total market Cap USD Chart.
2. Localization for Ranking Table
3. Stock Price Emoji

Commits

Here

Roadmap of CoinTools

1. real-time graphs
2. search cryptocurrency
3. historical data

Screenshots

Localization and Emoji

Total Market Cap USD Pie Chart:

Javascript calling CoinMarketCap API

// get ranking table from coinmarketcap
const getRankingTable = (currency, dom, limit = 100) => {
    let currency_upper = currency.toUpperCase();
    let currency_lower = currency.toLowerCase();
    let api = "https://api.coinmarketcap.com/v1/ticker/?limit=" + limit;
    if (currency != '') {
        api += "&convert=" + currency_upper;
    }
    logit("calling " + api);
    dom.html('');
    var up_or_down_img = function(x) {
        if (x >= 0) {
            return "📈" + x;
        } else {
            return "📉" + x;
        }
    }
    $.ajax({
        type: "GET",
        url: api,
        success: function(result) {
            let s = '';
            s += '';
            s += '';
            s += '';            
            for (let i = 0; i < result.length; i ++) {
                s += '';
                s += '
' + get_text('coin', 'Coin') + '';
            s += '
' + get_text('price_usd', 'Price USD') + '';
            s += '
' + get_text('price_btc', 'Price BTC') + '';
            s += '
' + get_text('change_1hr', 'Change 1 Hours') + '';
            s += '
' + get_text('change_24hr', 'Change 24 Hours') + '';
            s += '
' + get_text('change_7days', 'Change 7 Days') + '';
            s += '
' + get_text('last_updated', 'Last Updated') + '';
            s += '
' + result[i]['name'] + ' (' + result[i]['symbol'] + ')';
                s += '
' + result[i]['price_usd'] + '';
                s += '
' + result[i]['price_btc'] + '';
                s += '
' + up_or_down_img(result[i]['percent_change_1h']) + '';
                s += '
' + up_or_down_img(result[i]['percent_change_24h']) + '';
                s += '
' + up_or_down_img(result[i]['percent_change_7d']) + '';
                s += '
' + timestampToString(result[i]['last_updated']) + '';
                s += '';
            }
            s += '';
            s += '';
            dom.html(s);
            sorttable.makeSortable(document.getElementById("ranking"));
            // chart
            let data = [];
            let total = 0;
            for (let i = 0; i < Math.min(15, result.length); i ++) {
                data.push({'coin': result[i]['name'], 'market_cap_usd': result[i]['market_cap_usd']});
                total += parseInt(result[i]['market_cap_usd']);
            }
            api = "https://api.coinmarketcap.com/v1/global/";
            $.ajax({
                type: "GET",
                url: api,
                success: function(result) {       
                    let total_usd = parseInt(result.total_market_cap_usd);
                    let others = total_usd - total;
                    data.push({'coin': 'Others', 'market_cap_usd': others});
                    let chart = AmCharts.makeChart( "chart_div", {
                        "type": "pie",
                        "theme": "light",
                        "dataProvider": data,
                        "startDuration": 0,
                        "valueField": "market_cap_usd",
                        "titleField": "coin",
                        "balloon":{
                          "fixedPosition": true
                        },
                        "export": {
                          "enabled": false
                        }
                    });                      
                },
                error: function(request, status, error) {
                    logit('Response: ' + request.responseText);
                    logit('Error: ' + error );
                    logit('Status: ' + status);
                },
                complete: function(data) {
                    logit("API Finished: " + api);
                }   
            });                               
        },
        error: function(request, status, error) {
            logit('Response: ' + request.responseText);
            logit('Error: ' + error );
            logit('Status: ' + status);
        },
        complete: function(data) {
            logit("API Finished: " + api);
        }             
    }); 
}

License
MIT
Contribution Welcome
Github: https://github.com/DoctorLai/CoinTools/

Fork it!
Create your feature branch: git checkout -b my-new-feature
Commit your changes: git commit -am 'Add some feature'
Push to the branch: git push origin my-new-feature
Submit a pull request.

Chrome Webstore
Install the CoinTools Now!

Posted on Utopian.io -  Rewarding Open Source Contributors