public function notifyUrl() {

  if(isset($_POST['cpm_trans_id'])) {
        // Initialisation de CinetPay et Identification du paiement
        $id_transaction = $_POST['cpm_trans_id'];
        $apiKey = "1078567447584180beb603a5.42354627";
        $site_id = "808931";
        $plateform = "PROD";
        $version = "V1";
        $CinetPay = new CinetPay($site_id, $apiKey, $plateform, $version);

        $CinetPay->setTransId($id_transaction)->getPayStatus();
        $cpm_result = $CinetPay->_cpm_result;

        // Si le payement a réussi!
        if($cpm_result == '00') {
            $r = $this->sendSMS($this->session->userdata('user_telephone'));
            //$r = $this->saveInDatabase();
            exit(0);
        }

  }

}