Here is a list of all the possible errors that can occur during a payment made with an iOS integration (from https://github.com/hipay/hipay-fullservice-sdk-ios/blob/7c1404ad573c7f4b53a1da7343ae1bc4c3188e9c/HiPayFullservice/Core/Errors/HPFErrors.h):
Error code
Description
0
Unknown network/HTTP error
1
Network is unavailable
2
Config error (such as SSL, bad URL, etc.)
3
The connection has been interrupted
4
HTTP client error (400)
5
HTTP client error (typically a 500 error)
6
Configuration errors (refer to the HiPay Fullservice API documentation appendix)
7
Validation errors (refer to the HiPay Fullservice API documentation appendix)
8
Error codes relating to the Checkout process (refer to the HiPay Fullservice API documentation appendix)
9
Error codes relating to Maintenance operations (refer to the HiPay Fullservice API documentation appendix)
10
Acquirer Reason Codes (refer to the HiPay Fullservice API documentation appendix)
11
Unknown error
12
PKPaymentAuthorizationViewController cannot be loaded
13
Timeout error
Here is an example that a user might encounter:
