Relay responses

According to NIP-01 you can receive the following type of responses of a relay.

• EVENT - event JSON as defined above, used to send events requested by clients.
• OK - used to indicate acceptance or denial of an EVENT message.
• EOSE - used to indicate the end of stored events and the beginning of events newly received in real-time.
• CLOSED - used to indicate that a subscription was ended on the server side.
• NOTICE - used to send human-readable error messages or other things to clients.

NIP-42 provides a AUTH type response from the relay which is also supported in this library.