Function community_relay_options 

pub fn community_relay_options() -> RelayOptions

Relay options for a Community / “external” relay: the GOSSIP flag (+ PING for a 24/7 keepalive connection). GOSSIP is read/write-capable when TARGETED — can_read() is READ|GOSSIP|DISCOVERY and can_write() is WRITE|GOSSIP, so per-relay checks pass for fetch_events_from / send_event_to / subscribe_to. But pool-wide ops select READ-only / WRITE-only relays, so the DM/giftwrap subscription (subscribe(None)) and the user’s outbox (send_event) skip GOSSIP relays — the user’s own traffic never touches relays they don’t own. (A bare PING-only relay can NOT be used: can_write()/can_read() are false → the relay layer returns WriteDisabled / ReadDisabled.) An overlap relay that’s ALSO a user relay keeps its existing READ+WRITE flags — add_relay is a no-op (Ok(false)) for a url already pooled, reusing the one existing connection.