This table describes the changes to SKPaymentTransactionObserver Protocol Reference.
| Date | Notes |
|---|---|
| 2010-01-20 | Fixed a typo. |
| 2009-11-17 | Marked which methods in the protocol are optional. |
| 2009-07-13 | Added descriptions of restored transaction methods. |
| 2009-05-01 | Minor edits. |
| 2009-03-12 | New document that describes an interface for observing transactions updated by the payment queue. |
Last updated: 2010-01-20