davide
8bcee27c23
After the handshake the wallet checks server.features genesis_hash and, when the profile has checkpoints, the header at the highest checkpoint not above the server's tip (mainnet shares Bitcoin's genesis, so the checkpoint is what tells the chains apart). A server on another chain is refused with WrongChainException and the next candidate is tried. Used by the GUI, peer discovery, the CLI and the server probe. See ADR 0036.