From c6119cbbdf0607f29eac6e86d319b253b761a0a7 Mon Sep 17 00:00:00 2001
From: Robert Habermeier <rphmeier@gmail.com>
Date: Mon, 16 Jul 2018 17:17:52 +0100
Subject: [PATCH] hash random seed when using to choose round proposer (#336)

---
 substrate/polkadot/consensus/src/lib.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/substrate/polkadot/consensus/src/lib.rs b/substrate/polkadot/consensus/src/lib.rs
index 4ad6ba9544..4aee785def 100644
--- a/substrate/polkadot/consensus/src/lib.rs
+++ b/substrate/polkadot/consensus/src/lib.rs
@@ -256,6 +256,8 @@ impl<C, N, P> bft::Environment<Block> for ProposerFactory<C, N, P>
 		authorities: &[AuthorityId],
 		sign_with: Arc<ed25519::Pair>
 	) -> Result<(Self::Proposer, Self::Input, Self::Output), Error> {
+		use runtime_primitives::traits::{Hash as HashT, BlakeTwo256};
+
 		const DELAY_UNTIL: Duration = Duration::from_millis(5000);
 
 		let parent_hash = parent_header.hash().into();
@@ -263,6 +265,7 @@ impl<C, N, P> bft::Environment<Block> for ProposerFactory<C, N, P>
 		let id = BlockId::hash(parent_hash);
 		let duty_roster = self.client.duty_roster(&id)?;
 		let random_seed = self.client.random_seed(&id)?;
+		let random_seed = BlakeTwo256::hash(&*random_seed);
 
 		let (group_info, local_duty) = make_group_info(
 			duty_roster,