hitbtc php example

hitbtc_example.php

<?php
namespace Hitbtc;
/**
 * show off @method
 *
 * @method string balance() balance( array $params )
 * @method string ordersActive() ordersActive( array $params )
 * @method string new_order() new_order( array $params )
 * @method string cancel_order() cancel_order( array $params )
 * @method string trades() trades( array $params )
 * @method string ordersRecent() ordersRecent( array $params )
 *
 * @package Hitbtc
 */
class TradingApi
{

    CONST HITBTC_API_URL = 'http://demo-api.hitbtc.com';
    CONST HITBTC_TRADING_API_URL_SEGMENT = '/api/1/trading/';

    private $_key, $_secret;

    private $_availableMethods = array(
        'balance',
        'orders/active',
        'new_order',
        'cancel_order',
        'trades',
        'orders/recent',
    );

    private $_postMethods = array(
        'new_order',
        'cancel_order'
    );

    public function __construct($key, $secret)
    {
        $this->_key = $key;
        $this->_secret = $secret;
        $this->_nonce =  time()*1E3;
    }

    public function __call($name, $arguments) {

        $methodPathParts = preg_split('/(?=[A-Z])/', $name);

        $methodPathParts = array_map(
            function($pathSegment) { return strtolower($pathSegment); },
            $methodPathParts
        );

        $method = implode('/', $methodPathParts);

        if(!in_array($method, $this->_availableMethods)){
            throw new \Exception( 'Method that you try to call doesn\'t exists!' );
        }

        return $this->_request($method, $arguments, in_array($method, $this->_postMethods));

    }

    private function _request($method, $arguments, $isPost = FALSE)
    {
        $requestUri = self::HITBTC_TRADING_API_URL_SEGMENT
            . $method
            . '?nonce=' . $this->_getNonce()
            . '&apikey=' . $this->_key;

        $arguments = sizeof($arguments) > 0 ? $arguments[0] : array();
        $params = http_build_query($arguments);

        if (strlen($params) && $isPost === FALSE) {
            $requestUri .= '&' . $params;
        }

        $ch = curl_init();
        curl_setopt_array($ch, array(
                CURLOPT_URL => self::HITBTC_API_URL . $requestUri,
                CURLOPT_CONNECTTIMEOUT => 10,
                CURLOPT_RETURNTRANSFER => 1
            ));

        if($isPost) {
            curl_setopt($ch, CURLOPT_POST, TRUE);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
        }

        curl_setopt($ch, CURLOPT_HTTPHEADER, array('X-Signature: ' . $this->_signature($requestUri, $isPost ? $params : '')));

        $result = curl_exec($ch);
        curl_close($ch);
        return $result;
    }

    private function _signature($uri, $postData)
    {
        return strtolower(hash_hmac('sha512', $uri . $postData, $this->_secret));
    }

    private function _getNonce()
    {
        return $this->_nonce++;
    }

}





/**
 * Usage example
 **/
function randomString($length) {
    $key = '';
    $keys = array_merge(range(0, 9), range('a', 'z'));
    for ($i = 0; $i < $length; $i++) {
        $key .= $keys[array_rand($keys)];
    }
    return $key;
}

/**
 * Create instance and provide your api and secret keys as params
 **/
$interface = new \Hitbtc\TradingApi('xxx', 'yyy');

/**
 * Try to place order
 **/
$newOrderId = randomString(rand(8, 30));
echo $interface->new_order(array(
    'clientOrderId' => $newOrderId,
    'symbol' => 'BTCUSD',
    'side' => 'buy',
    'price' => 100.01, // $100.01
    'quantity' => 1, // 1 lot => 0.01 BTC
    'type' => 'limit',
    'timeInForce' => 'GTC'
));

/**
 * Try to cancel order
 **/
echo $interface->cancel_order(array(
    'cancelRequestClientOrderId' => randomString(rand(8, 30)),
    'clientOrderId' => $newOrderId,
    'symbol' => 'BTCUSD',
    'side' => 'buy'
));