From 5fd164bf66a0972d535b6209a20b3eecffff3d4e Mon Sep 17 00:00:00 2001
From: stasatdaglabs <39559713+stasatdaglabs@users.noreply.github.com>
Date: Mon, 24 Aug 2020 11:31:12 +0300
Subject: [PATCH] [NOD-1095] RLock the dagLock in SelectedTipHeader. (#893)

---
 domain/blockdag/dag.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/domain/blockdag/dag.go b/domain/blockdag/dag.go
index 543727be2..f01464143 100644
--- a/domain/blockdag/dag.go
+++ b/domain/blockdag/dag.go
@@ -211,6 +211,8 @@ func (dag *BlockDAG) selectedTip() *blockNode {
 //
 // This function is safe for concurrent access.
 func (dag *BlockDAG) SelectedTipHeader() *appmessage.BlockHeader {
+	dag.dagLock.RLock()
+	defer dag.dagLock.RUnlock()
 	selectedTip := dag.selectedTip()
 	if selectedTip == nil {
 		return nil