will do a more advanced version later
1. changes sentinel to use an http-like interface 2. moves hexutil, crypto/blake2b, metrics packages to erigon-lib
Co-authored-by: Giulio <giulio.rebuffo@gmail.com>
we update observability in the p2p layer for handlers, and also properly encode error codes, close streams. --------- Co-authored-by: Alex Sharov <AskAlexSharov@gmail.com> Co-authored-by: Giulio <giulio.rebuffo@gmail.com>
