Flutter RevenueCat Integration Setup

My Flutter app already has all in-app products configured in both Google Play Console and Apple App Store Connect; what is missing is a complete RevenueCat layer so I can manage everything from one place.

You will integrate the official RevenueCat Flutter SDK, wire it up to Google Play Billing and Apple StoreKit, create the corresponding products, offerings, and entitlements inside the RevenueCat dashboard, and make sure consumable credit purchases flow cleanly from sandbox through to production.

Deliverables
• RevenueCat SDK added to the existing Flutter project with clean, documented code
• Products, offerings, and entitlements mirrored from both stores into RevenueCat
• Working purchase and restore flows on Android and iOS test devices, including consumable credits being granted, stored, and consumed correctly
• Validation that receipts sync to RevenueCat and that webhooks (if enabled) fire as expected
• Short hand-off guide outlining any new environment keys, test accounts, and the steps I need to follow for future product updates

I will provide current app source, store product IDs, and access to the RevenueCat project. The project is finished once test purchases succeed on both platforms without console errors and entitlements update in real time.