In-app products in Deepwall represent the in-app products (subscriptions or one-time purchases) that users purchase on mobile platforms (App Store, Google Play Store or Huawei AppGallery) via your mobile app.
So you need to setup your in-app products for your Huawei apps on the Huawei App Gallery first before registering them to Deepwall.
You can check out the following guide to learn about setting up in-app products on Huawei App Gallery.
Huawei AppGallery Connect provides server push notifications that let us monitor state changes for managed subscriptions and/or one-time purchases with pending transactions.
By enabling real-time developer notifications, Deepwall will receive changes directly from Huawei anytime there is an update to a pending transaction or an existing subscription even users does not open their apps.
You can check out the following guide to learn about setting up developer notifications on Huawei App Gallery and configure it in Deepwall.