P2P - Part 3

[dakom]

Builds on top of #1106
Followed by #1108

Adds local p2p dev setup with mDNS and completes the e2e test setup to prove that it works

[ueco-jb]

Great work!
One other thing that is puzzling me a little is using a DefaultHasher, IIRC it was not advised to be actually used in distributed networks (or maybe I'm overdramatizing).
https://doc.rust-lang.org/src/std/hash/random.rs.html#99-104
I'm thinking about a hypothetical case where we do a partial upgrade of the network and some of the nodes are running a different (although compatible) version. But even in the worst case that would only increase an amount of duplicated (ignored) messages.

[dakom]

One other thing that is puzzling me a little is using a DefaultHasher

idk, but it's what they use in their example, so I assume it's fine for our purposes: https://github.com/libp2p/rust-libp2p/blob/5e3519fb66b92c7f7c0dc744ab360fd8b669fe54/examples/chat/src/main.rs#L62