By techjunkie — Aug 13, 2023 Should be trivial. Its not used for much, mainly ‘verification’. Npub is used for tagging.
Depends on the library you use I think. Some tools abstract it into a pool so you don't to worry about individual relays and deduplication of notes etc.
Adding the ip to the relay list of the client should be enough. If you have https self signed certificate that could be problematic i have noticed…