From 8f81bd90e75d320ce2077b65e789cf628a5847d5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Silva?= <andre.beat@gmail.com>
Date: Wed, 10 Jul 2019 12:36:27 +0100
Subject: [PATCH] network: don't announce genesis block (#3081)

---
 substrate/core/network/src/protocol.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/substrate/core/network/src/protocol.rs b/substrate/core/network/src/protocol.rs
index e12dc9be9d..76dec36761 100644
--- a/substrate/core/network/src/protocol.rs
+++ b/substrate/core/network/src/protocol.rs
@@ -1036,6 +1036,12 @@ impl<B: BlockT, S: NetworkSpecialization<B>, H: ExHashT> Protocol<B, S, H> {
 				return;
 			}
 		};
+
+		// don't announce genesis block since it will be ignored
+		if header.number().is_zero() {
+			return;
+		}
+
 		let hash = header.hash();
 
 		let message = GenericMessage::BlockAnnounce(message::BlockAnnounce { header: header.clone() });