jimmerioles/bitcoin-currency-converter-php

<?php

namespace Jimmerioles\BitcoinCurrencyConverter\Provider;

class CoindeskProvider extends AbstractProvider
{
    /**
     * Provider's exchange rates API endpoint, with 1 BTC as base.
     *
     * @var string
     */
    protected $apiEndpoint = 'https://api.coindesk.com/v1/bpi/currentprice.json';

    /**
     * Cache key to use when storing and retrieving from cache.
     *
     * @var string
     */
    protected $cacheKey = 'coindesk-cache-key';

    /**
     * Parse retrieved JSON data to exchange rates associative array.
     * i.e. ['BTC' => 1, 'USD' => 4000.00, ...]
     *
     * @param  string|json $rawJsonData
     * @return array
     */
    protected function parseToExchangeRatesArray($rawJsonData)
    {
        $arrayData = json_decode($rawJsonData, true);

        foreach ($arrayData['bpi'] as $value) {
            $exchangeRatesArray[$value['code']] = $value['rate_float'];
        }

        return $exchangeRatesArray;
    }
}