From 0835581fa97c076ec5ce979973b55f250d497d5b Mon Sep 17 00:00:00 2001
From: Anna Shaleva <shaleva.ann@nspcc.ru>
Date: Tue, 5 Jul 2022 12:20:31 +0300
Subject: [PATCH] network: adjust the way (*Server).IsInSync() works

Always return true if sync was reached once. Fix #2564.
---
 pkg/network/server.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkg/network/server.go b/pkg/network/server.go
index 91e591f8d..1bdedb122 100644
--- a/pkg/network/server.go
+++ b/pkg/network/server.go
@@ -535,8 +535,12 @@ func (s *Server) getVersionMsg() (*Message, error) {
 // minimum number) and the height of these peers (our chain has to be not lower
 // than 2/3 of our peers have). Ideally, we would check for the highest of the
 // peers, but the problem is that they can lie to us and send whatever height
-// they want to.
+// they want to. Once sync reached, IsInSync will always return `true`, even if
+// server is temporary out of sync after that.
 func (s *Server) IsInSync() bool {
+	if s.syncReached.Load() {
+		return true
+	}
 	var peersNumber int
 	var notHigher int