How can i find receipt is valid or not in iap
<p>I am doing one application.In that iam using InAppPurchase.I am getting the receipt from the server when the trasaction is completed.But my problem is how can i find that receipt is valid or not.I am using my own server for downloading the product after getting the receipt from the appstore.But before downloading i have to check that receipt is valid or not.</p>
