title: iPhone - in-App purchase consumable correct approach
body: <p>I have this new app I am creating that will use consumable in-app purchases.</p>
  
  <p>My question is this: how does that work? I mean, imagine the user buys a consumable stuff. So, after finalizing the sell I set a flag on the app's database authorizing the use of that object. I read somewhere that I have to provide the user with a button to restore old transactions in case of the user for some reason loses his device and has to restore everything. </p>
  
  <p>Imagine the user has already used that purchase and after that he restores the old in-app purchases. What happens then? Will the user have the same resources again, so he can use a second time without paying? How it works and how should I approach that?</p>
  
  <p>thanks</p>