final optional author:Semisol
Relays may support notifying clients when all stored events have been sent.
If a relay supports this NIP, the relay SHOULD send the client a EOSE message in the format ["EOSE", <subscription_id>] after it has sent all the events it has persisted and it indicates all the events that come after this message are newly published.
Clients SHOULD use the supported_nips field to learn if a relay supports end of stored events notices.
The motivation for this proposal is to reduce uncertainty when all events have been sent by a relay to make client code possibly less complex.