on_message_extension Event

Fired when a Message Extension is present in a message being parsed.

Syntax

class ServerMessageExtensionEventParams(object):
  @property
  def name() -> str: ...
  @property
  def id() -> str: ...
  @property
  def data() -> str: ...
  @property
  def critical() -> bool: ...
  @property
  def recognized() -> bool: ...
  @recognized.setter
  def recognized(value) -> None: ...

# In class Server:
@property
def on_message_extension() -> Callable[[ServerMessageExtensionEventParams], None]: ...
@on_message_extension.setter
def on_message_extension(event_hook: Callable[[ServerMessageExtensionEventParams], None]) -> None: ...

Remarks

Enables the parsing of Message Extension data by firing when extensions have been included in a ARes, CRes, RReq or PRes message that is being parsed. Message Extensions carry additional data not defined in the 3DS Protocol. This event fires once for each such extension. Event arguments correspond to the four elements comprising the extension, as well as an indication of whether or not the extension is recognized:

If a 3-D Secure application receives a message containing a critical extension that it does not recognize, it must treat it as invalid and return Error Code = 202. This event will fire before the exception is thrown.