From ea314605d35cc109def00f4721e6ca3e9a8c207c Mon Sep 17 00:00:00 2001
From: vyzo <vyzo@hackzen.org>
Date: Fri, 27 Mar 2020 19:52:08 +0200
Subject: [PATCH] don't forward messages with source ourselves but not
 published by ourselves

per stebalien's request.
---
 gossipsub.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/gossipsub.go b/gossipsub.go
index 088ab95..bdf7aca 100644
--- a/gossipsub.go
+++ b/gossipsub.go
@@ -556,6 +556,12 @@ func (gs *GossipSubRouter) connector() {
 }
 
 func (gs *GossipSubRouter) Publish(msg *Message) {
+	self := gs.p.host.ID()
+	if peer.ID(msg.GetFrom()) == self && msg.ReceivedFrom != self {
+		// we don't forward messages claiming to be from us but not published by ourselves
+		return
+	}
+
 	gs.mcache.Put(msg.Message)
 	from := msg.ReceivedFrom
 
@@ -567,7 +573,7 @@ func (gs *GossipSubRouter) Publish(msg *Message) {
 			continue
 		}
 
-		if gs.floodPublish && from == gs.p.host.ID() {
+		if gs.floodPublish && from == self {
 			for p := range tmap {
 				if gs.score.Score(p) >= gs.publishThreshold {
 					tosend[p] = struct{}{}