fix: add max limit to ws sub

Author: thesimplekid

crates/cdk-axum/src/ws/subscribe.rs

@@ -15,6 +15,16 @@ pub(crate) async fn handle(
         return Err(WsError::InvalidParams);
     }
 
+    let max_filters = context.state.mint.max_inputs();
+    if params.filters.len() > max_filters {
+        tracing::warn!(
+            "WebSocket subscription request exceeds max filters limit: {} > {}",
+            params.filters.len(),
+            max_filters
+        );
+        return Err(WsError::InvalidParams);
+    }
+
     let mut subscription = context
         .state
         .mint

crates/cdk/src/mint/mod.rs

@@ -475,11 +475,19 @@ impl Mint {
     }
 
     /// Localstore
+    #[inline]
     pub fn localstore(&self) -> DynMintDatabase {
         Arc::clone(&self.localstore)
     }
 
+    /// Get the maximum number of inputs allowed per transaction
+    #[inline]
+    pub fn max_inputs(&self) -> usize {
+        self.max_inputs
+    }
+
     /// Pub Sub manager
+    #[inline]
     pub fn pubsub_manager(&self) -> Arc<PubSubManager> {
         Arc::clone(&self.pubsub_manager)
     }