From 74c2df658e7254c40eedc57f2b4c86a4629816ea Mon Sep 17 00:00:00 2001
From: Joost Jager <joost.jager@gmail.com>
Date: Fri, 15 Nov 2019 11:15:22 +0100
Subject: [PATCH] localchans: log policy update error

---
 log.go                        |  2 ++
 routing/localchans/log.go     | 16 ++++++++++++++++
 routing/localchans/manager.go |  3 +++
 3 files changed, 21 insertions(+)
 create mode 100644 routing/localchans/log.go

diff --git a/log.go b/log.go
index 23b1699d..f7ba8e10 100644
--- a/log.go
+++ b/log.go
@@ -31,6 +31,7 @@ import (
 	"github.com/lightningnetwork/lnd/netann"
 	"github.com/lightningnetwork/lnd/peernotifier"
 	"github.com/lightningnetwork/lnd/routing"
+	"github.com/lightningnetwork/lnd/routing/localchans"
 	"github.com/lightningnetwork/lnd/signal"
 	"github.com/lightningnetwork/lnd/sweep"
 	"github.com/lightningnetwork/lnd/watchtower"
@@ -99,6 +100,7 @@ func init() {
 	addSubLogger("CHFD", chanfunding.UseLogger)
 
 	addSubLogger(routing.Subsystem, routing.UseLogger)
+	addSubLogger(routing.Subsystem, localchans.UseLogger)
 	addSubLogger(routerrpc.Subsystem, routerrpc.UseLogger)
 	addSubLogger(wtclientrpc.Subsystem, wtclientrpc.UseLogger)
 	addSubLogger(chanfitness.Subsystem, chanfitness.UseLogger)
diff --git a/routing/localchans/log.go b/routing/localchans/log.go
new file mode 100644
index 00000000..9ebcf4d0
--- /dev/null
+++ b/routing/localchans/log.go
@@ -0,0 +1,16 @@
+package localchans
+
+import (
+	"github.com/btcsuite/btclog"
+)
+
+// log is a logger that is initialized with no output filters.  This
+// means the package will not perform any logging by default until the caller
+// requests it.
+var log btclog.Logger
+
+// UseLogger uses a specified Logger to output package logging info. This
+// function is called from the parent package htlcswitch logger initialization.
+func UseLogger(logger btclog.Logger) {
+	log = logger
+}
diff --git a/routing/localchans/manager.go b/routing/localchans/manager.go
index e99a5a35..19fdbe5e 100644
--- a/routing/localchans/manager.go
+++ b/routing/localchans/manager.go
@@ -79,6 +79,9 @@ func (r *Manager) UpdatePolicy(newSchema routing.ChannelPolicy,
 		// Apply the new policy to the edge.
 		err := r.updateEdge(info.ChannelPoint, edge, newSchema)
 		if err != nil {
+			log.Warnf("Cannot update policy for %v: %v\n",
+				info.ChannelPoint, err,
+			)
 			return nil
 		}