From 950861e558bb190ef6005e607a7deb9ece7352ea Mon Sep 17 00:00:00 2001
From: Pierre Krieger <pierre.krieger1708@gmail.com>
Date: Thu, 29 Oct 2020 11:47:58 +0100
Subject: [PATCH] Print an error if an unregistered notifications protocol is
 used (#7457)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* Print an error if an nregistered notifications protocol is used

* Print an error if an nregistered notifications protocol is used

* Update client/network/src/service.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>
---
 substrate/client/network/src/service.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/substrate/client/network/src/service.rs b/substrate/client/network/src/service.rs
index 9cb37e7700..93abbbad02 100644
--- a/substrate/client/network/src/service.rs
+++ b/substrate/client/network/src/service.rs
@@ -661,6 +661,11 @@ impl<B: BlockT + 'static, H: ExHashT> NetworkService<B, H> {
 		if let Some(protocol_name) = protocol_name {
 			sink.send_sync_notification(protocol_name, message);
 		} else {
+			log::error!(
+				target: "sub-libp2p",
+				"Attempted to send notification on unknown protocol: {:?}",
+				engine_id,
+			);
 			return;
 		}