iOS StoreKit - When to call - (void)restoreCompletedTransactions?

Question

I have lots of 1 time purchase IAPs inside of my application. Users can purchase them just fine.

My problem is that I am integrating with Flurry to track real purch

Answer 1

The Apple IOS SDK documentation is actually misleading on this issue as it says that:

@property(nonatomic, readonly) SKPaymentTransaction *originalTransaction
The contents of this property are undefined except when transactionState is set to SKPaymentTransactionStateRestored.

The problem is that when the user clicks your buy button, go through the purchase process, and finally get a message that he has already paid and that he can redownload for free, your observer does not send you a SKPaymentTransactionStateRestored. It actually sends you a SKPaymentTransactionStatePurchased.

The good news is that despite the documentation, you will actually get the property originalTransaction even when the state of your transaction is SKPaymentTransactionStatePurchased. Just test to see if this property is nil or not and you will know if the transaction was a new purchase or an old purchased restored for free.