Introduction

CoinTools is a handy gadget to Chrome browser that you can launch easily to view the information of cryptocurrency.

Previous Contributions

• CoinTools v0.0.3: Adding Total Market Cap USD Chart, Localization and Stock Price Emoji
• 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

v0.0.4 Feature

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

1. Total market cap USD in 24 hours
2. Conversion between two FIAT currencies
3. Conversion between FIAT and cryptocurrency
4. Ranking table changed from 100 to 200.

Commits

Here

Roadmap of CoinTools

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

Screenshots

24 Hour Total Market Cap USD Pie Chart:

You can now specify the FIAT currency

Javascript

To convert between two FIAT is done via 1 BTC.

// ajax calling API to return the price of USD for coin
const getPriceOfUSD = (coin) => {
    return new Promise((resolve, reject) => {
        let api = "https://api.coinmarketcap.com/v1/ticker/" + coin + '/';
        fetch(api, {mode: 'cors'}).then(validateResponse).then(readResponseAsJSON).then(function(result) {
            resolve(result[0].price_usd);
        }).catch(function(error) {
            logit('Request failed: ' + api + ": " + error);
            reject(error);
        });
    });
}

// ajax calling API to return the price of currency for 1 BTC
const getPriceOf1BTC = (currency) => {
    return new Promise((resolve, reject) => {
        let api = "https://api.coinmarketcap.com/v1/ticker/bitcoin/?convert=" + currency.toUpperCase();
        fetch(api, {mode: 'cors'}).then(validateResponse).then(readResponseAsJSON).then(function(result) {            
            resolve(result[0]['price_' + currency.toLowerCase()]);
        }).catch(function(error) {
            logit('Request failed: ' + api + ": " + error);
            reject(error);
        });
    });
}

// ajax calling API to return the price of USD for coin
const getPriceOf = (coin, fiat) => {
    return new Promise((resolve, reject) => {
        let api = "https://api.coinmarketcap.com/v1/ticker/" + coin + '/?convert=' + fiat.toUpperCase();
        fetch(api, {mode: 'cors'}).then(validateResponse).then(readResponseAsJSON).then(function(result) {
            resolve(result[0]['price_' + fiat.toLowerCase()]);
        }).catch(function(error) {
            logit('Request failed: ' + api + ": " + error);
            reject(error);
        });
    });
}

// ajax get conversion
const getConversion = async(coin1, coin2) => {
    // determine if input is coin or currency
    let is_coin1 = !currency_array.includes(coin1.toUpperCase());
    let is_coin2 = !currency_array.includes(coin2.toUpperCase());
    // both are coins
    if ((is_coin1) && (is_coin2)) {
        let api1 = getPriceOfUSD(coin1);
        let api2 = getPriceOfUSD(coin2);
        return await api1 / await api2;
    }
    // both are currencies e.g. USD to CNY
    if ((!is_coin1) && (!is_coin2)) {
        let api1 = getPriceOf1BTC(coin1);
        let api2 = getPriceOf1BTC(coin2);
        return await api2 / await api1;
    }
    // converting coin1 to fiat coin2
    if (is_coin1) {
        return await getPriceOf(coin1, coin2);
    } else { // convert coin2 to fiat coin1
        return 1.0/await getPriceOf(coin2, coin1);
    }
}

License

MIT

Contribution Welcome

Github: https://github.com/DoctorLai/CoinTools/

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

Chrome Webstore

Install the CoinTools Now!

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Posted on Utopian.io - Rewarding Open Source Contributors

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