From f829d33d6fd51e2a6d607dc651edbe3f9ea05416 Mon Sep 17 00:00:00 2001
From: "Johan T. Halseth" <johanth@gmail.com>
Date: Tue, 28 May 2019 11:03:14 +0200
Subject: [PATCH] route: return 0 fee from TotalFees for empty route.

Otherwise we would crash calling the method on empty routes.
---
 routing/route/route.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/routing/route/route.go b/routing/route/route.go
index 9b010e77..2cd04684 100644
--- a/routing/route/route.go
+++ b/routing/route/route.go
@@ -103,6 +103,10 @@ func (r *Route) HopFee(hopIndex int) lnwire.MilliSatoshi {
 // the case of a one-hop payment, this value will be zero as we don't need to
 // pay a fee to ourself.
 func (r *Route) TotalFees() lnwire.MilliSatoshi {
+	if len(r.Hops) == 0 {
+		return 0
+	}
+
 	return r.TotalAmount - r.Hops[len(r.Hops)-1].AmtToForward
 }