use CHfur\AppGallery\ServerNotifications\ServerNotification;
use CHfur\AppGallery\ServerNotifications\SubscriptionNotification;
use Huawei\IAP\Response\SubscriptionResponse;

$data = [/* AppGallery ServerNotification request */];
$publicKey = 'Your AppGallery notification public key';

/** @var ServerNotification $serverNotification */
$serverNotification = ServerNotification::parse($data, $publicKey);

if($serverNotification->isSubscriptionNotification()){
    /** @var SubscriptionNotification $subscriptionNotification */
    $subscriptionNotification = $serverNotification->getSubscriptionNotification();
    
    $productId = $subscriptionNotification->getProductId();
    $environment = $subscriptionNotification->getEnvironment();

    /** @var SubscriptionResponse $subscriptionResponse */
    $subscriptionResponse = $subscriptionNotification->getSubscriptionResponse();
    
    $notificationTypeName = $subscriptionNotification->getNotificationTypeName();
    
    switch ($notificationTypeName){
        case 'RENEWAL':
            //implement your logic
            break;
    }
}

use CHfur\AppGallery\ServerNotifications\PendingPurchaseNotification;
use CHfur\AppGallery\ServerNotifications\ServerNotification;

$data = [/* AppGallery ServerNotification request */];
$publicKey = 'Your AppGallery notification public key';

/** @var ServerNotification $serverNotification */
$serverNotification = ServerNotification::parse($data, $publicKey);

if($serverNotification->isPendingPurchaseNotification()){
    /** @var PendingPurchaseNotification $pendingPurchaseNotification */
    $pendingPurchaseNotification = $serverNotification->getPendingPurchaseNotification();
    
    $productId = $pendingPurchaseNotification->getProductId();
    $purchaseToken = $pendingPurchaseNotification->getPurchaseToken();
    $isSuccessPayment = $pendingPurchaseNotification->getNotificationType();
    
    //implement your logic
}