Optional appApple AppStore specific additional data
Optional applicationThe application's user identifier.
Set Store.applicationUsername instead. The per-transaction value is ignored — adapters always read the store-level username so receipt validation later (which doesn't have access to the original additionalData) sees the same value that was sent to the native API at purchase time. Passing this field logs a one-shot notice.
Optional braintreeBraintree specific additional data
Optional googleGooglePlay specific additional data
Optional quantityQuantity of items to purchase.
Only supported on platforms that report the 'orderQuantity' capability.
Platforms without support will ignore this field.
Data to attach to a transaction.
See