From e0ba66791dcfaf4c1e6e13648128890905591ff7 Mon Sep 17 00:00:00 2001
From: Vitaliy Vlasov <siphiuel@protonmail.com>
Date: Fri, 22 Sep 2023 15:15:26 +0300
Subject: [PATCH] fix: only allow adding unique topics

---
 waku/v2/peerstore/waku_peer_store.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/waku/v2/peerstore/waku_peer_store.go b/waku/v2/peerstore/waku_peer_store.go
index df80df88..5d2f28e0 100644
--- a/waku/v2/peerstore/waku_peer_store.go
+++ b/waku/v2/peerstore/waku_peer_store.go
@@ -155,6 +155,11 @@ func (ps *WakuPeerstoreImpl) AddPubSubTopic(p peer.ID, topic string) error {
 	if err != nil {
 		return err
 	}
+	for _, t := range existingTopics {
+		if t == topic {
+			return nil
+		}
+	}
 	existingTopics = append(existingTopics, topic)
 	return ps.peerStore.Put(p, peerPubSubTopics, existingTopics)
 }