From 53076880f1e137c6a40c3a105b2a81ed12621c1c Mon Sep 17 00:00:00 2001
From: Joost Jager <joost.jager@gmail.com>
Date: Mon, 11 Nov 2019 12:26:48 +0100
Subject: [PATCH] htlcswitch: report failure source index for forwarding errors

---
 htlcswitch/failure.go | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/htlcswitch/failure.go b/htlcswitch/failure.go
index 4526e356..0d817a07 100644
--- a/htlcswitch/failure.go
+++ b/htlcswitch/failure.go
@@ -30,10 +30,14 @@ type ForwardingError struct {
 // returned.
 func (f *ForwardingError) Error() string {
 	if f.ExtraMsg == "" {
-		return fmt.Sprintf("%v", f.FailureMessage)
+		return fmt.Sprintf(
+			"%v@%v", f.FailureMessage, f.FailureSourceIdx,
+		)
 	}
 
-	return fmt.Sprintf("%v: %v", f.FailureMessage, f.ExtraMsg)
+	return fmt.Sprintf(
+		"%v@%v: %v", f.FailureMessage, f.FailureSourceIdx, f.ExtraMsg,
+	)
 }
 
 // ErrorDecrypter is an interface that is used to decrypt the onion encrypted