feat: relay list and profile metadata publishing (CEP-6)

src/gateway/mod.rs

@@ -139,6 +139,10 @@ mod tests {
             cleanup_interval: Duration::from_secs(120),
             session_timeout: Duration::from_secs(600),
             request_timeout: Duration::from_secs(60),
+            relay_list_urls: None,
+            bootstrap_relay_urls: None,
+            publish_relay_list: true,
+            profile_metadata: None,
         };
 
         let config = GatewayConfig { nostr_config };

src/relay/mock.rs

@@ -229,6 +229,11 @@ impl RelayPoolTrait for MockRelayPool {
 
         Ok(())
     }
+
+    /// Mock ignores target URLs — delegates to `publish()`.
+    async fn publish_to(&self, _urls: &[String], builder: EventBuilder) -> Result<EventId> {
+        self.publish(builder).await
+    }
 }
 
 // ── Helpers ───────────────────────────────────────────────────────────────────

src/relay/mod.rs

@@ -34,6 +34,8 @@ pub trait RelayPoolTrait: Send + Sync {
     async fn public_key(&self) -> Result<PublicKey>;
     /// Subscribe to events matching filters.
     async fn subscribe(&self, filters: Vec<Filter>) -> Result<()>;
+    /// Sign and publish an event to specific relay URLs.
+    async fn publish_to(&self, urls: &[String], builder: EventBuilder) -> Result<EventId>;
 }
 
 /// Relay pool wrapper for managing Nostr relay connections.
@@ -135,6 +137,16 @@ impl RelayPool {
         }
         Ok(())
     }
+
+    /// Sign and publish an event to specific relay URLs.
+    pub async fn publish_to(&self, urls: &[String], builder: EventBuilder) -> Result<EventId> {
+        let output = self
+            .client
+            .send_event_builder_to(urls, builder)
+            .await
+            .map_err(|e| Error::Transport(e.to_string()))?;
+        Ok(output.val)
+    }
 }
 
 #[async_trait]
@@ -177,4 +189,8 @@ impl RelayPoolTrait for RelayPool {
     async fn subscribe(&self, filters: Vec<Filter>) -> Result<()> {
         RelayPool::subscribe(self, filters).await
     }
+
+    async fn publish_to(&self, urls: &[String], builder: EventBuilder) -> Result<EventId> {
+        RelayPool::publish_to(self, urls, builder).await
+    }
 }