Find a way to "re-use" commands data for/over multiple interfaces

[mStirner]

For example: my samsung TV can be controlled over a serial connection or via WebSocket over ethernet.
To not define every command (string) twice or "clone" the command object, a neat way would be to define the commands once, and handle them respectively based on the type: SERIAL / ETHERNET.

The way over WebSocket is to "wrap" it in a json message with other properties/parameters.
Over Serial, just send the payload to the device.

How to handle both?
In fact for the WebSocket/Ethernet type a plugin/custom handler is needed.

But to store the commands for both interfaces and declare them only once a solution is needed/appreciated .

[mStirner]

Commands have a property .interface. How about to change this from string to/and or array store multiple interfaces?

Could there be a problem with the command handler?
The interface is passed as argument to it, so no(?|!)