The process for purchasing digital goods is designed to be consistent for each payment type and for all BlackBerry device users.

1. A user clicks a purchase option for digital goods in your application.
   

2. The application creates a PurchaseArguments object which contains information about the digital goods.

   PurchaseArgumentsBuilder arguments = new PurchaseArgumentsBuilder()
       .withDigitalGoodSku( "abc123" )
       .withDigitalGoodName( "Adventures of a BlackBerry Java Developer" )
       .withPurchasingAppName( "My eBooks" )
       .withMetadata ( "ISBN 34560202010" );

3. The application invokes PaymentEngine.purchase(PurchaseArguments) to initiate the purchase request and send information about the digital goods to the Payment Service server.

   try 
   {
       PurchaseResult purchaseResult = engine.purchase(arguments.build());
   } 
   catch (PaymentException e) 
   {
       Dialog.inform(e.getMessage());
   }

4. If the user isn't logged in using a BlackBerry ID account, the application prompts the user to provide login information without requiring that the user leave the application.
   

5. The application prompts the user to confirm the purchase using the default payment type. The user can change the payment type or set up a new payment type.
   

6. The Payment Service server verifies that the digital goods are valid and processes the purchase through the payment provider.
7. Depending on the results of the purchase attempt, one of the following events occurs:
   • If the purchase request is successful, the Payment Service server returns a PurchaseResult object to the application that contains details about the successful purchase. If the application utilizes a content server, the Payment Service server can send information about the successful purchase to the content server as well.
   • If the purchase request is unsuccessful, the application throws an exception. For information about handling exceptions, view the API reference for the Payment Service SDK.
8. If the purchase attempt is successful, the application provides the digital goods to the user in the manner that you designed.