Oja is a Ruby client for verification of Apple Store Receipts.
iOS and Mac application receive Receipts when handling purchases from the App Store. Before authorizing access to in-app content, these applications need to verify the receipt with Apple. Oja helps you check the Receipt's status.
$ gem install oja
response = Oja.verify(:data => data) if response.active? # Whatever you need to do elsif response.inactive? # The receipt probably expired else raise RuntimeError, response.humanized_status end