The network protocol (the data structures in network/src/message.rs) changes from time to time, but we don't have any upgrade strategy. If the networking changes, we will suddenly start dropping peers that don't use the same version.

There is a protocol_version variable in the source code, but modifying it makes us instantly incompatible with nodes having a different version.

Libp2p has a version negotiation system that makes it possible to support multiple version at the same time, but we don't benefit from it.

How to do that without bloating the code is however unclear.