From 6207af2ec46937db76c9e2ee20e482340035ffe6 Mon Sep 17 00:00:00 2001
From: Benjamin Kampmann <ben@gnunicorn.org>
Date: Fri, 11 Jan 2019 13:51:26 +0100
Subject: [PATCH 1/2] Properly log sealing and the newly created proposal hash
 from aura

---
 core/basic-authorship/src/basic_authorship.rs | 19 ++++++++++---------
 core/consensus/aura/src/lib.rs                |  9 ++++++++-
 2 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/core/basic-authorship/src/basic_authorship.rs b/core/basic-authorship/src/basic_authorship.rs
index d4d39c4541f65..e524b6aa9e15d 100644
--- a/core/basic-authorship/src/basic_authorship.rs
+++ b/core/basic-authorship/src/basic_authorship.rs
@@ -232,15 +232,16 @@ impl<Block, C, A> Proposer<Block, C, A>	where
 				self.transaction_pool.remove_invalid(&unqueue_invalid);
 			})?;
 
-		info!("Proposing block [number: {}; hash: {}; parent_hash: {}; extrinsics: [{}]]",
-			  block.header().number(),
-			  <<C as AuthoringApi>::Block as BlockT>::Hash::from(block.header().hash()),
-			  block.header().parent_hash(),
-			  block.extrinsics().iter()
-			  .map(|xt| format!("{}", BlakeTwo256::hash_of(xt)))
-			  .collect::<Vec<_>>()
-			  .join(", ")
-			 );
+		info!("Prepared block for proposing at {} [hash: {:?}; parent_hash: {}; extrinsics: [{}]]",
+			block.header().number(),
+			<<C as AuthoringApi>::Block as BlockT>::Hash::from(block.header().hash()),
+			block.header().parent_hash(),
+			block.extrinsics()
+				.iter()
+				.map(|xt| format!("{}", BlakeTwo256::hash_of(xt)))
+				.collect::<Vec<_>>()
+				.join(", ")
+		);
 
 		let substrate_block = Decode::decode(&mut block.encode().as_slice())
 			.expect("blocks are defined to serialize to substrate blocks correctly; qed");
diff --git a/core/consensus/aura/src/lib.rs b/core/consensus/aura/src/lib.rs
index f544c2f0e7357..ca01919516471 100644
--- a/core/consensus/aura/src/lib.rs
+++ b/core/consensus/aura/src/lib.rs
@@ -304,6 +304,7 @@ pub fn start_aura<B, C, E, I, SO, Error>(
 						}
 
 						let (header, body) = b.deconstruct();
+						let header_num = header.number().clone();
 						let pre_hash = header.hash();
 						let parent_hash = header.parent_hash().clone();
 
@@ -316,7 +317,7 @@ pub fn start_aura<B, C, E, I, SO, Error>(
 							signature,
 						);
 
-						let import_block = ImportBlock {
+						let import_block : ImportBlock<B> = ImportBlock {
 							origin: BlockOrigin::Own,
 							header,
 							justification: None,
@@ -327,6 +328,12 @@ pub fn start_aura<B, C, E, I, SO, Error>(
 							fork_choice: ForkChoiceStrategy::LongestChain,
 						};
 
+						info!("Pre-sealed block for proposal at {}. Hash now {:?}, previously {:?}.",
+							header_num,
+							import_block.post_header().hash(),
+							pre_hash
+						);
+
 						if let Err(e) = block_import.import_block(import_block, None) {
 							warn!(target: "aura", "Error with block built on {:?}: {:?}",
 								parent_hash, e);

From 7f62d90b6fc8b74a41af80ccdfc0768fdd24774d Mon Sep 17 00:00:00 2001
From: Gav Wood <gavin@parity.io>
Date: Fri, 11 Jan 2019 15:20:25 +0100
Subject: [PATCH 2/2] Update lib.rs

---
 core/consensus/aura/src/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/consensus/aura/src/lib.rs b/core/consensus/aura/src/lib.rs
index ca01919516471..5906c267b3737 100644
--- a/core/consensus/aura/src/lib.rs
+++ b/core/consensus/aura/src/lib.rs
@@ -317,7 +317,7 @@ pub fn start_aura<B, C, E, I, SO, Error>(
 							signature,
 						);
 
-						let import_block : ImportBlock<B> = ImportBlock {
+						let import_block: ImportBlock<B> = ImportBlock {
 							origin: BlockOrigin::Own,
 							header,
 							justification: None,