iOS InApp receipt validation and unlock the app

Question

I'm validating receipts with the App Store for auto renewing subscription using my own server. And returns status, receipt, latest_receipt, latest_receipt_info, latest_expired_receipt_info, pending_renewal_info and is-retryable in response as mentioned in the Apple documentation. So after getting above response what are the parameters we need to check before unlock the app.

Answer 1

First, you should check if receipt status is valid. If the status code returns a value between 21100-21199 (Internal data access error), check is_retyrable flag. Make sure to retry in case the status is a retryable Internal data access error.

You also want to check the latest active receipt. latest_receipt_info includes the list of purchases. You should check end-date of the latest receipt and make sure that it is not in the past

(see https://developer.apple.com/documentation/appstorereceipts/expires_date_ms)