How to get apple id from In-app Purchase transaction_id

Question

In my application when user will buy any product using In- app Purchase i can not force user please log in in my application [ That is apple condition]

When a user will buy any product apple just give a in app purchase transaction_id .

In that case i can not keep track any users information in my system. later when the user will restore his In - app purchase product in another device, without any user track/ apple id/ Unique ID i can not manage my application.

how to i can get apple users unique id by transaction_id..?

Answer 1

The in-app purchase receipt fields do not have any PII (personally identifiable information). See details in the Receipt validation programming guide. In other words, you can not get user's apple-id from a transaction-id.

If you just want to be able to restore previous purchases, you can do so by restoring purchased products. See the details in In-app purchase programming guide

If you want to track the user for other purposes, you can have the user login in the app before showing them the purchase screens.