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6. Instant Payment Notifications (IPNs) > Recommended Exercises

Recommended Exercises

  • Deploy the IPN listener code to AppSpot and run the sample code from Chapter 2 locally on your computer with the Google App Engine Launcher in order to log in and purchase a Tweet Relevance subscription using Express Checkout. After successfully performing the Express Checkout, your IPN listener should automatically receive an IPN that sends you an email.

  • Transplant the IPNHandler featured in the sample code from this chapter into the sample code from another chapter, such as Chapter 2, in order to have a single, unified project file that features IPNs. Deploy this project to AppSpot and complete a payment transaction to trigger an IPN and ensure that it works as expected.


  

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