db: add event_id_already_seen method

rust-nostr · Oct 12, 2023 · 040cf3b · 040cf3b
1 parent 0d4199f
commit 040cf3b
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Showing 2 changed files with 8 additions and 0 deletions.
diff --git a/crates/nostr-sdk-db/src/lib.rs b/crates/nostr-sdk-db/src/lib.rs
@@ -45,6 +45,9 @@ pub trait NostrDatabase: AsyncTraitDeps {
     /// Save [`Event`] into store
     async fn save_event(&self, event: &Event) -> Result<(), Self::Err>;
 
+    /// Check if [`EventId`] was already seen
+    async fn event_id_already_seen(&self, event_id: EventId) -> Result<bool, Self::Err>;
+
     /// Save [`EventId`] seen by relay
     ///
     /// Useful for NIP65 (gossip)

diff --git a/crates/nostr-sdk-db/src/memory.rs b/crates/nostr-sdk-db/src/memory.rs
@@ -48,6 +48,11 @@ impl NostrDatabase for MemoryDatabase {
         Ok(())
     }
 
+    async fn event_id_already_seen(&self, event_id: EventId) -> Result<bool, Self::Err> {
+        let seen_event_ids = self.seen_event_ids.read().await;
+        Ok(seen_event_ids.contains_key(&event_id))
+    }
+
     async fn save_event_id_seen_by_relay(
         &self,
         event_id: EventId,