class EndpointSetter
{
    /**
     * AmazonPay module object
     *
     * @var AmazonPay
     */
    private $module;

    /**
     * Sets `$module` member var with dependency injection.
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @param AmazonPay $module
     * @return void
     */
    public function __construct(AmazonPay $module) {
        $this->module = $module;
    }

    /**
     * Sets Merchant's IPN endpoint to their EC site domain
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @param string $url
     * @return int
     * @throws InvalidArgumentException Thrown by V1 AmazonPay Client.
     * @throws Exception Thrown by V1 AmazonPay Client.
     */
    public function set($url) {
        $client = $this->module->getAmazonV1Client();

        // possible array values: ALL, ORDER_REFERENCE, PAYMENT_AUTHORIZE, PAYMENT_CAPTURE,
        // PAYMENT_REFUND, BILLING_AGREEMENT, CHARGEBACK_DETAILED
        $notificationConfiguration[$url] = ['ALL'];
        $requestParameters['notification_configuration_list'] = $notificationConfiguration;

        $response = $client->setMerchantNotificationConfiguration($requestParameters);

        return $response->toArray();
    }
}