feat: Waku v2 bridge

Issue #12610

vendor/github.com/anacrolix/missinggo/v2/event_synchronized.go

@@ -0,0 +1,26 @@
+package missinggo
+
+import "sync"
+
+type SynchronizedEvent struct {
+	mu sync.Mutex
+	e  Event
+}
+
+func (me *SynchronizedEvent) Set() {
+	me.mu.Lock()
+	me.e.Set()
+	me.mu.Unlock()
+}
+
+func (me *SynchronizedEvent) Clear() {
+	me.mu.Lock()
+	me.e.Clear()
+	me.mu.Unlock()
+}
+
+func (me *SynchronizedEvent) C() <-chan struct{} {
+	me.mu.Lock()
+	defer me.mu.Unlock()
+	return me.e.C()
+}