From 8ae8071c541fe31306e0ac0c48314f0a914b9c47 Mon Sep 17 00:00:00 2001
From: Wilmer Paulino <wilmer.paulino@gmail.com>
Date: Thu, 23 May 2019 14:01:05 -0700
Subject: [PATCH] waddrmgr: use RLock when retrieving sync info

---
 waddrmgr/sync.go | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/waddrmgr/sync.go b/waddrmgr/sync.go
index 308812e..1163c6f 100644
--- a/waddrmgr/sync.go
+++ b/waddrmgr/sync.go
@@ -74,8 +74,8 @@ func (m *Manager) SetSyncedTo(ns walletdb.ReadWriteBucket, bs *BlockStamp) error
 // can use this information for intelligently initiating rescans to sync back to
 // the best chain from the last known good block.
 func (m *Manager) SyncedTo() BlockStamp {
-	m.mtx.Lock()
-	defer m.mtx.Unlock()
+	m.mtx.RLock()
+	defer m.mtx.RUnlock()
 
 	return m.syncState.syncedTo
 }
@@ -85,8 +85,6 @@ func (m *Manager) SyncedTo() BlockStamp {
 // reorg is taking place and how far back it goes.
 func (m *Manager) BlockHash(ns walletdb.ReadBucket, height int32) (
 	*chainhash.Hash, error) {
-	m.mtx.Lock()
-	defer m.mtx.Unlock()
 
 	return fetchBlockHash(ns, height)
 }
@@ -94,8 +92,8 @@ func (m *Manager) BlockHash(ns walletdb.ReadBucket, height int32) (
 // Birthday returns the birthday, or earliest time a key could have been used,
 // for the manager.
 func (m *Manager) Birthday() time.Time {
-	m.mtx.Lock()
-	defer m.mtx.Unlock()
+	m.mtx.RLock()
+	defer m.mtx.RUnlock()
 
 	return m.birthday
 }