Check HMAC key for incoming message #30
Description
We receive messages, but we don't check HMAC key setted uo up on handshake proccess with peer.
We can do it here:
https://github.com/astroband/astrocore/blob/master/src/overlay/peer.rs#L462-L463
You can read about handshake process here:
https://github.com/astroband/astrocore/wiki/Network#handshake