I am planning to make a loyalty card program for thousands of shops.
When a user pays its bill with Apple/Android pay, I want that the loyalty card is automatically credited with f(billAmount). I know it is possible to do so with automatic selection option in an iOS loyalty card. But does it work when you have more than one shop link to this card? Could it works with thousands of different shops linked to the same card?
(I am not an iOS/Android native programmer so I am not used to the wallet specs so I don't need implementation details.)