From 19f51163af1df6ff20e32e23cd3f26f7644df967 Mon Sep 17 00:00:00 2001
From: ucwong <ucwong@126.com>
Date: Wed, 22 Jan 2025 18:40:19 +0800
Subject: [PATCH] ensure API timeoutLoop terminates with event system

---
 ctxc/filters/api.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ctxc/filters/api.go b/ctxc/filters/api.go
index 7ce9b08662..c2e0243dfa 100644
--- a/ctxc/filters/api.go
+++ b/ctxc/filters/api.go
@@ -86,7 +86,11 @@ func (api *FilterAPI) timeoutLoop(timeout time.Duration) {
 	ticker := time.NewTicker(timeout)
 	defer ticker.Stop()
 	for {
-		<-ticker.C
+		select {
+		case <-ticker.C:
+		case <-api.events.chainSub.Err():
+			return
+		}
 		api.filtersMu.Lock()
 		for id, f := range api.filters {
 			select {