How to check if player purchase a In App Purchase

Development Programming & Scripting Blueprint
1

Dear all,

I know how to make a in app purchase by using blueprint node "Make an In-App Purchase ",
but how do I know if a specific IAP has been already purchased by player?
By using “Read In-App Purchase Information” blueprint node? But I cannot see any information in the InAppPurchaseProductInfo struct related to if the player purchase it or not.

Also, I am not quite sure when I should use the “Restore In-App Purchases” blueprint node.
Can anyone tell me about this node?

Thank you so much!