fix panic

groups.0xchat.com/extra_policies.go

@@ -25,6 +25,9 @@ var rateLimitBuckets = xsync.NewMapOf[*relay29.Group, *rate.Limiter]()
 
 func rateLimit(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
 	group := state.GetGroupFromEvent(event)
+	if group == nil {
+		return true, "invalid group"
+	}
 
 	bucket, _ := rateLimitBuckets.LoadOrCompute(group, func() *rate.Limiter {
 		return rate.NewLimiter(rate.Every(time.Minute*2), 30)
@@ -35,6 +38,6 @@ func rateLimit(ctx context.Context, event *nostr.Event) (reject bool, msg string
 		return true, "rate-limited"
 	} else {
 		rsv.OK()
-		return
+		return false, ""
 	}
 }

state.go

@@ -132,12 +132,19 @@ func (s *State) loadGroups(ctx context.Context) {
 }
 
 func (s *State) GetGroupFromEvent(event *nostr.Event) *Group {
-	group, _ := s.Groups.Load(GetGroupIDFromEvent(event))
+	groupID := GetGroupIDFromEvent(event)
+	if groupID == "" {
+		return nil
+	}
+	group, _ := s.Groups.Load(groupID)
 	return group
 }
 
 func GetGroupIDFromEvent(event *nostr.Event) string {
 	gtag := event.Tags.GetFirst([]string{"h", ""})
+	if gtag == nil || len(*gtag) < 2 {
+		return ""
+	}
 	groupId := (*gtag)[1]
 	return groupId
 }