PAGSEGURO CODEIGNITER

<?php
class PagSeguro extends CI_Controller {
    #protected $allowed_http_methods = array('get', 'delete', 'post', 'put');

    public function __construct() {
        parent::__construct();
        header('Access-Control-Allow-Origin: *');
    }

    public  function notify() {
        PagSeguroLibrary::init();
        $pagseguroConfig = PagSeguroConfig::init();

        $pagseguroConfig->setEnvironment('sandbox');
        $pagseguroConfig->setData('credentials', 'email', '[email protected]');
        $pagseguroConfig->setData('credentials', 'token', array("sandbox" => 'x'));
        $pagseguroConfig->setData('credentials', 'appId', array("sandbox" => "x"));
        $pagseguroConfig->setData('credentials', 'appKey', array("sandbox" => "x"));

        $credentials = PagSeguroConfig::getAccountCredentials(); // getApplicationCredentials()

        $code = $this->input->post("notificationCode");

        $response = PagSeguroNotificationService::checkTransaction(
                $credentials,
                $code
        );


//      'INITIATED' => 0,
//      'WAITING_PAYMENT' => 1,
//      'IN_ANALYSIS' => 2,
//      'PAID' => 3,
//      'AVAILABLE' => 4,
//      'IN_DISPUTE' => 5,
//      'REFUNDED' => 6,
//      'CANCELLED' => 7,
//      'SELLER_CHARGEBACK' => 8,
//      'CONTESTATION' => 9
        log_message('error', "Recebida notificaçao do pagseguro");
        // pagamentos apenas
        if ($response->getType()->getValue() == 1 && is_numeric($response->getReference())) {
//          echo "<pre>";
//          var_dump($response);
//          echo "</pre>";

            $this->load->model("pagseguro_model");
            $this->pagseguro_model->adicionarTransacaoUpdate($response);
        }


    }
}