Hello there,
I understand that the "transaction_id" key is always unique whenever any transaction happens, whether it occurs due to auto-renewal of a subscription.
The "original_transaction_id" always remains the same across all transactions of a single subscription. But why does it stay the same when the subscription expires or is canceled, and we purchase the same subscription again with the same Apple account? Why does the "original_transaction_id" stay the same?
The reason I'm concerned is this: let's consider a situation where User1 purchases a subscription, and then their subscription is canceled or expires. Then User2, using the same Apple account, purchases the same type of subscription, and we get the same "original_transaction_id" for User2 as well. In this case, User1’s receipt also gets updated with the latest "expires_date_ms," which can cause one subscription to benefit two users.
I hope I explained my query correctly.
Regards, Shivam