Which communication protocol and serialization method is supported?

[Rene36]

Dear Paddle Team,

I am currently writing a survey paper on Federated Computing. One part of it describes existing FL frameworks. Could you please let me know which communication protocol (e.g., gRPC, WebSocket, HTTP, GLOO) and serialization method (e.g., Pickle, JSON, Protobuf, FOBS) Paddle supports? I already saw in your code base that you support gRPC, but maybe there is more.

Any help is highly appreciated.