Need Swift Developer to help with Subscription addition to app

I have a large app that is ready to be placed on the Apple AppStore. In fact the process is well under way, but I ran into a snag as I can't seem to master the Code in my app to handle the 'Auto-Renewable Subscription part. What I have ready: - my app is complete (minus this part) and 95% prepared for Submission in AppStore Connect - I have 2 In-App Purchases set up in my App Store Connect that are ready to Submit (1x Annual $399 Subscription & 1x $0.49 weekly Sub for admin purposes) - I have also successfully setup a sandbox for testing. - I have all my 'Agreements, Tax and Banking' set up and active What I need: - Some one who knows how to set up StoreKit - I need an IAP manager Class page - I need to be able to access that class from my first View Controller page. for functions that will check receipt dates, purchase, and restore (if app was deleted or subscription took place elsewhere). - On load I want the app check a user default setting value to see if it is licensed. - On Subscription purchase and then once a week (so, if Date() > defaults last-saved-date + 7), I want the app - on load to check the AppStore receipt to validate the subscription and update the defaults saved date value. This way, if the user cancels or renews, its covered. They may get a week extra use, no biggy. - I need a handler for what the receipt determines. Just print to console or log for now and I can edit the responses. - I want the receipt fetch method to be as per Apple's recommendations to keep from getting intercepted. - I want a func to place anywhere in app that accesses and returns a reliable server held date, so that users can't play with their devices clock to get free subscription. I can send you whatever you need. Not sure if you would use my SandBox or your own. I can send the two Product IDs and my App-Specific Shared Secret (not sure if I actually need this). I'd rather not send the app, unless you really need it. So the code can be in chunks and I can place it where it needs to go. And you can test it with my variables (such as product IDs) or with your own and then I can edit them. And also, if you know how to accomplish what I laid out in a better way, that's fine too.