Proposed improvements:

• Unify the payload type as a serde deserializable object (ideally protobuf deserializable)
• Make sure the noise layer can be removed by fixing all protocols to be encrypted on the base layer
• Remove RLP from the protocol
• Use timestamp inside the messages? (gameable, unnecessary?)

The msg and ack transports should be handled by the https://crates.io/crates/libp2p-stream .