From ef730627adedd8c55c29f22402256d5326246085 Mon Sep 17 00:00:00 2001
From: vyzo <vyzo@hackzen.org>
Date: Wed, 21 Feb 2018 19:03:12 +0200
Subject: [PATCH] remove unnecessary and potentially harmful check from
 heartbeat

- the check is unnecessary because peers emit PRUNE on Leave
- the check is harmful, because the ANNOUNCE message might have
  benn lost (or reordered after the GRAFT depending on the retry
  strategy), which would leave the mesh in an inconsistent state.
---
 gossipsub.go | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/gossipsub.go b/gossipsub.go
index 6835147..8793977 100644
--- a/gossipsub.go
+++ b/gossipsub.go
@@ -334,14 +334,6 @@ func (gs *GossipSubRouter) heartbeat() {
 	// maintain the mesh for topics we have joined
 	for topic, peers := range gs.mesh {
 
-		// check whether our peers are still in the topic
-		for p := range peers {
-			_, ok := gs.p.topics[topic][p]
-			if !ok {
-				delete(peers, p)
-			}
-		}
-
 		// do we have enough peers?
 		if len(peers) < GossipSubDlo {
 			ineed := GossipSubD - len(peers)