From df390df966d9e7e1d2a86a9f46844d65362d16d3 Mon Sep 17 00:00:00 2001
From: Conner Fromknecht <conner@lightning.engineering>
Date: Tue, 23 Apr 2019 20:04:23 -0700
Subject: [PATCH] watchtower/wtmock/client_db: clone bytes w/ nil

---
 watchtower/wtmock/client_db.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/watchtower/wtmock/client_db.go b/watchtower/wtmock/client_db.go
index fc0402de7..5853c363f 100644
--- a/watchtower/wtmock/client_db.go
+++ b/watchtower/wtmock/client_db.go
@@ -110,7 +110,7 @@ func (m *ClientDB) CreateClientSession(session *wtdb.ClientSession) error {
 		Policy:           session.Policy,
 		SeqNum:           session.SeqNum,
 		TowerLastApplied: session.TowerLastApplied,
-		RewardPkScript:   session.RewardPkScript,
+		RewardPkScript:   cloneBytes(session.RewardPkScript),
 		CommittedUpdates: make(map[uint16]*wtdb.CommittedUpdate),
 		AckedUpdates:     make(map[uint16]wtdb.BackupID),
 	}
@@ -228,7 +228,12 @@ func (m *ClientDB) AddChanPkScript(chanID lnwire.ChannelID, pkScript []byte) err
 }
 
 func cloneBytes(b []byte) []byte {
+	if b == nil {
+		return nil
+	}
+
 	bb := make([]byte, len(b))
 	copy(bb, b)
+
 	return bb
 }