Add Subscriptions Model and Ravepay/FlutterWave Payment Gateway to my E-commerce Android(Java) App and PHP /Laravel Backend

Add Subscriptions Model and Ravepay/FlutterWave Payment Gateway to my Ecommerce Android App and PHP Backend. 1. The Subscriptions will be set to Hourly, Daily, Weekly and Monthly Basis from the Backend. 2. The Subscription Products/Packages should work perfectly with the already built Coupon. 3. Subscription Packages will be displayed in the App. 4. The Ravepay/FlutterWave Payment Gateway will work perfectly with both Products and Subscriptions.