Payments: error codes

Response Codes of Sync request

As stated in Sync response page, there are the following error codes in the return of the sync request:

Response Code	Description
0	Success
1	User pressed back or canceled a dialog
2	The network connection is down
3	This billing API version is not supported for the type requested
4	Requested SKU is not available for purchase
5	Invalid arguments provided to the API
6	Fatal error during the API action
7	Failure to purchase since item is already owned
8	Failure to consume since item is not owned