5:44:32 - PART 4: Validating In-App Purchases 5:46:24 - Creating The Backend Project 5:53:37 - Build The Purchase Handler 6:01:29 - Configure App Store Purchase Handler 6:11:52 - Setup Product Data Lookup 6:16:47 - Setup Firebase Calls To Update Firestore 6:32:28 - Deploy Verify Purchase For iOS 6:45:26 - Verify Purchases For iOS 6:55:24 - Google Play Purchase Handler: Part 1 7:03:51 - Google Play Purchase Handler: Part 2 7:20:58 - Verify Purchase For Android 7:24:28 - Configure App Store Event Listener 7:33:31 - Run Cloud Functions Locally 7:43:58 - Decode App Store Purchase Event Data 7:56:59 - Update Subscriptions From App Store Events 8:14:26 - Configure Pub/Sub For Play Store Events 8:24:58 - Update Subscriptions From Play Store Events 8:40:43 - Expire Subscriptions