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<?php /** * Example usage of the KrakenAPIClient library. * * See https://www.kraken.com/help/api for more info. * */ namespace Payward; /** * Reference implementation for Kraken's REST API. * * See https://www.kraken.com/help/api for more info. * * * The MIT License (MIT) * * Copyright (c) 2013 Payward, Inc * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ class KrakenAPIException extends \ErrorException {}; class KrakenAPI { protected $key; // API key protected $secret; // API secret protected $url; // API base URL protected $version; // API version protected $curl; // curl handle /** * Constructor for KrakenAPI * * @param string $key API key * @param string $secret API secret * @param string $url base URL for Kraken API * @param string $version API version * @param bool $sslverify enable/disable SSL peer verification. disable if using beta.api.kraken.com */ function __construct($key, $secret, $url='https://api.kraken.com', $version='0', $sslverify=true) { $this->key = $key; $this->secret = $secret; $this->url = $url; $this->version = $version; $this->curl = curl_init(); curl_setopt_array($this->curl, array( CURLOPT_SSL_VERIFYPEER => $sslverify, CURLOPT_SSL_VERIFYHOST => 2, CURLOPT_USERAGENT => 'Kraken PHP API Agent', CURLOPT_POST => true, CURLOPT_RETURNTRANSFER => true) ); } function __destruct() { curl_close($this->curl); } /** * Query public methods * * @param string $method method name * @param array $request request parameters * @return array request result on success * @throws KrakenAPIException */ function QueryPublic($method, array $request = array()) { // build the POST data string $postdata = http_build_query($request, '', '&'); // make request curl_setopt($this->curl, CURLOPT_URL, $this->url . '/' . $this->version . '/public/' . $method); curl_setopt($this->curl, CURLOPT_POSTFIELDS, $postdata); curl_setopt($this->curl, CURLOPT_HTTPHEADER, array()); $result = curl_exec($this->curl); if($result===false) throw new KrakenAPIException('CURL error: ' . curl_error($this->curl)); // decode results $result = json_decode($result, true); if(!is_array($result)) throw new KrakenAPIException('JSON decode error'); return $result; } /** * Query private methods * * @param string $method method path * @param array $request request parameters * @return array request result on success * @throws KrakenAPIException */ function QueryPrivate($method, array $request = array()) { if(!isset($request['nonce'])) { // generate a 64 bit nonce using a timestamp at microsecond resolution // string functions are used to avoid problems on 32 bit systems $nonce = explode(' ', microtime()); $request['nonce'] = $nonce[1] . str_pad(substr($nonce[0], 2, 6), 6, '0'); } // build the POST data string $postdata = http_build_query($request, '', '&'); // set API key and sign the message $path = '/' . $this->version . '/private/' . $method; $sign = hash_hmac('sha512', $path . hash('sha256', $request['nonce'] . $postdata, true), base64_decode($this->secret), true); $headers = array( 'API-Key: ' . $this->key, 'API-Sign: ' . base64_encode($sign) ); // make request curl_setopt($this->curl, CURLOPT_URL, $this->url . $path); curl_setopt($this->curl, CURLOPT_POSTFIELDS, $postdata); curl_setopt($this->curl, CURLOPT_HTTPHEADER, $headers); $result = curl_exec($this->curl); if($result===false) throw new KrakenAPIException('CURL error: ' . curl_error($this->curl)); // decode results $result = json_decode($result, true); if(!is_array($result)) throw new KrakenAPIException('JSON decode error'); return $result; } } // your api credentials $key = 'cYrXn9E+6xe7pGfrc1i/mrpnNAac7G7Z2fQ3UvNXq9BXHkTTyWZiRyCK'; $secret = 'zslMp0lAhGiEYMH7onNeiCd5NAlibEdk09Z4LL/xkn9EXPjIQumSKaUCTg5WmE4ZHFzgy+2fbRAA5lbGqvGI4Q=='; // set which platform to use (currently only beta is operational, live available soon) $beta = false; $url = $beta ? 'https://api.beta.kraken.com' : 'https://api.kraken.com'; $sslverify = $beta ? false : true; $version = 0; $kraken = new KrakenAPI($key, $secret, $url, $version, $sslverify); // Query private asset balances $res = $kraken->QueryPrivate('Balance'); print_r($res); /** * Example output: * * Array * ( * [error] => Array * ( * ) * * [result] => Array * ( * [ZUSD] => 3415.8014 * [ZEUR] => 155.5649 * [XBTC] => 149.9688412800 * [XXRP] => 499889.51600000 * ) * * ) */