cexapi.class.php

<?

## Author:        t0pep0
## e-mail:        t0pep0.gentoo@gmail.com
## Jabber:        t0pep0@jabber.ru
## BTC   :        1ipEA2fcVyjiUnBqUx7PVy5efktz2hucb
## donate free =)

class cexapi
{
 
 private $username;
 private $api_key;
 private $api_secret;
 private $nonce_v;
 
 ##Create class##
 public function __construct($username, $api_key, $api_secret)
 {
  $this -> username = $username;
  $this -> api_key = $api_key;
  $this -> api_secret = $api_secret;
 }
 
 ##Create signature##
 private function signature()
  {
   $string = $this -> nonce_v.$this -> username.$this->api_key; ##Create string
   $hash = hash_hmac('sha256', $string, $this->api_secret); ##Create hash
   $hash = strtoupper($hash);
   return $hash;
  }
 
 ##get timestamp as nonce##
 private function nonce()
  {
   $this -> nonce_v = time();
  }
 
 ##send post request##
 private function post($url, $param = array())
  {
   $post = '';
   if (!empty($param))
   {
    foreach($param as $k=>$v)
     $post .= $k.'='.$v.'&'; //Dirty, but work
    $post = substr($post, 0, strlen($post)-1);
   }
   $ch = curl_init();
   curl_setopt($ch, CURLOPT_URL, $url);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
   curl_setopt($ch, CURLOPT_POST, true);
   curl_setopt($ch, CURLOPT_USERAGENT, 'phpAPI');
   curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
   $out = curl_exec($ch);
   curl_close($ch);
   return $out;
  } 

 ##send api call (over post request)
 public function api_call($method, $param = array(), $private = false, $couple = '')
  {
   $url = "https://cex.io/api/$method/"; ## Create url
   if ($couple !== '')
    $url .= "$couple/"; ##set couple if needed
   if ($private === true) ##Create param
    {
     $this -> nonce();
     $param = array_merge(array(
      'key' => $this -> api_key,
      'signature' => $this -> signature(),
      'nonce' => $this -> nonce_v), $param);
    }
   $answer = $this -> post($url,$param);
   $answer = json_decode($answer, true);
   return $answer;
  }
 
 public function ticker($couple)
  {
   return $this -> api_call('order_book', array(), false, $couple = 'GHS/BTC');
  }

 public function trade_history($since = 1, $couple = 'GHS/BTC')
  {
   return $this -> api_call('trade_history',array("since" => $since), false, $couple);
  }

 public function balance()
  {
   return $this -> api_call('balance',array(), true);
  }

 public function open_orders($couple = 'GHS/BTC')
  {
   return $this -> api_call('open_orders',array(),true,$couple);
  }

 public function cancel_order($order_id)
  {
   return $this -> api_call('cancel_order', array("id" => $order_id),true);
  }
	      
 public function place_order($ptype = 'buy', $amount = 1, $price = 1, $couple = 'GHS/BTC')
  {
   return $this -> api_call('place_order', array(
    "type" => ptype,
    "amount" => amount,
    "price" => price),true,couple);
  }

}
?>