pool: add RelayPool::save_subscription

Closes rust-nostr#523

Signed-off-by: Yuki Kishimoto <[email protected]>

CHANGELOG.md

@@ -58,6 +58,7 @@
 * nostr: add `Request::multi_pay_invoice` constructor ([Yuki Kishimoto])
 * nostr: add `Jsonutil::as_pretty_json` and `JsonUtil::try_as_pretty_json` methods ([Yuki Kishimoto])
 * pool: add `RelayPoolNotification::Authenticated` variant ([Yuki Kishimoto])
+* pool: add `RelayPool::save_subscription` ([Yuki Kishimoto])
 * sdk: add `Client::gift_wrap_to` and `Client::send_private_msg_to` ([reyamir])
 * sdk: add option to autoconnect relay on `Client::add_relay` method call ([Yuki Kishimoto])
 * sdk: add support to embedded tor client ([Yuki Kishimoto])

crates/nostr-relay-pool/src/pool/internal.rs

@@ -122,7 +122,7 @@ impl InternalRelayPool {
         subscriptions.get(id).cloned()
     }
 
-    async fn update_pool_subscription(&self, id: SubscriptionId, filters: Vec<Filter>) {
+    pub async fn save_subscription(&self, id: SubscriptionId, filters: Vec<Filter>) {
         let mut subscriptions = self.subscriptions.write().await;
         let current: &mut Vec<Filter> = subscriptions.entry(id).or_default();
         *current = filters;
@@ -459,9 +459,8 @@ impl InternalRelayPool {
     ) -> Result<Output<()>, Error> {
         // Check if isn't auto-closing subscription
         if !opts.is_auto_closing() {
-            // Update pool subscriptions
-            self.update_pool_subscription(id.clone(), filters.clone())
-                .await;
+            // Save subscription
+            self.save_subscription(id.clone(), filters.clone()).await;
         }
 
         // Get relays

crates/nostr-relay-pool/src/pool/mod.rs

@@ -217,6 +217,14 @@ impl RelayPool {
         self.inner.subscription(id).await
     }
 
+    /// Register subscription in the [RelayPool]
+    ///
+    /// When a new relay will be added, saved subscriptions will be automatically used for it.
+    #[inline]
+    pub async fn save_subscription(&self, id: SubscriptionId, filters: Vec<Filter>) {
+        self.inner.save_subscription(id, filters).await
+    }
+
     /// Send client message to all connected relays
     #[inline]
     pub async fn send_msg(