A string that uniquely identifies a successful payment transaction.
- iOS 3.0+
- macOS 10.7+
- tvOS 9.0+
The contents of this property are undefined except when
transaction is set to
transaction is a string that uniquely identifies the processed payment. Your application may wish to record this string as part of an audit trail for App Store purchases. See In-App Purchase Programming Guide for more information.
The value of this property corresponds to the Transaction Identifier property in the receipt.