Error Codes
The following snippet gives an overview of the errors detected and reported by the 3DS Server handling 3DS 1.0 / Union Pay transactions. For every error there is an error code defined. In case the 3DS Server detects an error, the error will be logged together with the error code in the application log.
For a description of the XML Signature standard used by Union Pay protocol, please refer to the official documentation provided by Union Pay.