Bindings specification

Are for protocol specific message properties, they must match the naming conventions of the Message Bindings Object in AsyncAPI.

A message sent to an application can only contain one protocol in its binding object. A message sent from an application can include multiple protocol bindings. The server simply ignores the binding if it cannot handle it. This is to allow for progressive migrations of an application

Kafka

The Kafka binding object has the following key:

• message["bindings"]["keys"] (NotRequired [ Optional [bytes ]]) - The bytes of the Kafka key, this can be also be None. If missing, it defaults to None.