Merge branch 'master' into ethminer_crate

Conflicts: Cargo.lock Cargo.toml ethcore/src/client/client.rs hook.sh parity/main.rs rpc/Cargo.toml rpc/src/v1/impls/eth.rs sync/Cargo.toml sync/src/tests/helpers.rs
2016-03-11 14:26:23 +01:00 · 2016-03-11 14:26:23 +01:00 · 03da6c991f
parent 55a14b3aaf 22d1def894
commit 03da6c991f
56 changed files with 1212 additions and 833 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@ -220,7 +220,6 @@ dependencies = [
 "num_cpus 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
 "rust-crypto 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-serialize 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 "time 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

@ -245,7 +244,6 @@ dependencies = [
 "jsonrpc-http-server 3.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-serialize 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_codegen 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_json 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
@ -314,7 +312,6 @@ dependencies = [
 "heapsize 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 "time 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

--- a/Cargo.toml
+++ b/Cargo.toml
@ -28,21 +28,17 @@ ethcore-devtools = { path = "devtools" }
 ethcore-rpc = { path = "rpc", optional = true }
 clippy = { version = "0.0.44", optional = true }

-[dev-dependencies]
-ethcore = { path = "ethcore", features = ["dev"] }
-ethcore-util = { path = "util", features = ["dev"] }
-ethsync = { path = "sync", features = ["dev"] }
-ethcore-rpc = { path = "rpc", features = ["dev"] }
-
 [features]
 default = ["rpc"]
 rpc = ["ethcore-rpc"]
-dev = ["ethcore/dev", "ethcore-util/dev", "ethsync/dev", "ethcore-rpc/dev", "ethminer/dev"]
-dev-clippy = ["clippy", "ethcore/clippy", "ethcore-util/clippy", "ethsync/clippy", "ethcore-rpc/clippy",
-"ethminer/clippy"]
+dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethsync/dev", "ethcore-rpc/dev", "ethminer/dev"]
 travis-beta = ["ethcore/json-tests"]
-travis-nightly = ["ethcore/json-tests", "dev-clippy", "dev"]
+travis-nightly = ["ethcore/json-tests", "dev"]

 [[bin]]
 path = "parity/main.rs"
 name = "parity"
+
+[profile.release]
+debug = false
+lto = false
--- a/cargo.sh
+++ b/cargo.sh
@ -1,2 +0,0 @@
-#!/bin/sh
-cargo "$@" --features dev-clippy
--- a/ethcore/Cargo.toml
+++ b/ethcore/Cargo.toml
@ -5,10 +5,6 @@ license = "GPL-3.0"
 name = "ethcore"
 version = "0.9.99"
 authors = ["Ethcore <admin@ethcore.io>"]
-build = "build.rs"
-
-[build-dependencies]
-rustc_version = "0.1"

 [dependencies]
 log = "0.3"
@ -31,5 +27,5 @@ jit = ["evmjit"]
 evm-debug = []
 json-tests = []
 test-heavy = []
-dev = []
+dev = ["clippy"]
 default = []
--- a/ethcore/src/basic_types.rs
+++ b/ethcore/src/basic_types.rs
@ -24,7 +24,7 @@ pub type LogBloom = H2048;
 /// Constant 2048-bit datum for 0. Often used as a default.
 pub static ZERO_LOGBLOOM: LogBloom = H2048([0x00; 256]);

-#[cfg_attr(all(nightly, feature="dev"), allow(enum_variant_names))]
+#[cfg_attr(feature="dev", allow(enum_variant_names))]
 /// Semantic boolean for when a seal/signature is included.
 pub enum Seal {
 	/// The seal/signature is included.
--- a/ethcore/src/block.rs
+++ b/ethcore/src/block.rs
@ -16,7 +16,7 @@

 //! Blockchain block.

-#![cfg_attr(all(nightly, feature="dev"), allow(ptr_arg))] // Because of &LastHashes -> &Vec<_>
+#![cfg_attr(feature="dev", allow(ptr_arg))] // Because of &LastHashes -> &Vec<_>

 use common::*;
 use engine::*;
--- a/ethcore/src/block_queue.rs
+++ b/ethcore/src/block_queue.rs
@ -95,7 +95,7 @@ pub struct BlockQueue {
 	panic_handler: Arc<PanicHandler>,
 	engine: Arc<Box<Engine>>,
 	more_to_verify: Arc<Condvar>,
-	verification: Arc<Mutex<Verification>>,
+	verification: Arc<Verification>,
 	verifiers: Vec<JoinHandle<()>>,
 	deleting: Arc<AtomicBool>,
 	ready_signal: Arc<QueueSignal>,
@ -121,7 +121,7 @@ struct QueueSignal {
 }

 impl QueueSignal {
-	#[cfg_attr(all(nightly, feature="dev"), allow(bool_comparison))]
+	#[cfg_attr(feature="dev", allow(bool_comparison))]
 	fn set(&self) {
 		if self.signalled.compare_and_swap(false, true, AtomicOrdering::Relaxed) == false {
 			self.message_channel.send(UserMessage(SyncMessage::BlockVerified)).expect("Error sending BlockVerified message");
@ -132,18 +132,23 @@ impl QueueSignal {
 	}
 }

-#[derive(Default)]
 struct Verification {
-	unverified: VecDeque<UnverifiedBlock>,
-	verified: VecDeque<PreverifiedBlock>,
-	verifying: VecDeque<VerifyingBlock>,
-	bad: HashSet<H256>,
+	// All locks must be captured in the order declared here.
+	unverified: Mutex<VecDeque<UnverifiedBlock>>,
+	verified: Mutex<VecDeque<PreverifiedBlock>>,
+	verifying: Mutex<VecDeque<VerifyingBlock>>,
+	bad: Mutex<HashSet<H256>>,
 }

 impl BlockQueue {
 	/// Creates a new queue instance.
 	pub fn new(config: BlockQueueConfig, engine: Arc<Box<Engine>>, message_channel: IoChannel<NetSyncMessage>) -> BlockQueue {
-		let verification = Arc::new(Mutex::new(Verification::default()));
+		let verification = Arc::new(Verification {
+			unverified: Mutex::new(VecDeque::new()),
+			verified: Mutex::new(VecDeque::new()),
+			verifying: Mutex::new(VecDeque::new()),
+			bad: Mutex::new(HashSet::new()),
+		});
 		let more_to_verify = Arc::new(Condvar::new());
 		let ready_signal = Arc::new(QueueSignal { signalled: AtomicBool::new(false), message_channel: message_channel });
 		let deleting = Arc::new(AtomicBool::new(false));
@ -186,17 +191,17 @@ impl BlockQueue {
 		}
 	}

-	fn verify(verification: Arc<Mutex<Verification>>, engine: Arc<Box<Engine>>, wait: Arc<Condvar>, ready: Arc<QueueSignal>, deleting: Arc<AtomicBool>, empty: Arc<Condvar>) {
+	fn verify(verification: Arc<Verification>, engine: Arc<Box<Engine>>, wait: Arc<Condvar>, ready: Arc<QueueSignal>, deleting: Arc<AtomicBool>, empty: Arc<Condvar>) {
 		while !deleting.load(AtomicOrdering::Acquire) {
 			{
-				let mut lock = verification.lock().unwrap();
+				let mut unverified = verification.unverified.lock().unwrap();

-				if lock.unverified.is_empty() && lock.verifying.is_empty() {
+				if unverified.is_empty() && verification.verifying.lock().unwrap().is_empty() {
 					empty.notify_all();
 				}

-				while lock.unverified.is_empty() && !deleting.load(AtomicOrdering::Acquire) {
-					lock = wait.wait(lock).unwrap();
+				while unverified.is_empty() && !deleting.load(AtomicOrdering::Acquire) {
+					unverified = wait.wait(unverified).unwrap();
 				}

 				if deleting.load(AtomicOrdering::Acquire) {
@ -205,39 +210,42 @@ impl BlockQueue {
 			}

 			let block = {
-				let mut v = verification.lock().unwrap();
-				if v.unverified.is_empty() {
+				let mut unverified = verification.unverified.lock().unwrap();
+				if unverified.is_empty() {
 					continue;
 				}
-				let block = v.unverified.pop_front().unwrap();
-				v.verifying.push_back(VerifyingBlock{ hash: block.header.hash(), block: None });
+				let mut verifying = verification.verifying.lock().unwrap();
+				let block = unverified.pop_front().unwrap();
+				verifying.push_back(VerifyingBlock{ hash: block.header.hash(), block: None });
 				block
 			};

 			let block_hash = block.header.hash();
 			match verify_block_unordered(block.header, block.bytes, engine.deref().deref()) {
 				Ok(verified) => {
-					let mut v = verification.lock().unwrap();
-					for e in &mut v.verifying {
+					let mut verifying = verification.verifying.lock().unwrap();
+					for e in verifying.iter_mut() {
 						if e.hash == block_hash {
 							e.block = Some(verified);
 							break;
 						}
 					}
-					if !v.verifying.is_empty() && v.verifying.front().unwrap().hash == block_hash {
+					if !verifying.is_empty() && verifying.front().unwrap().hash == block_hash {
 						// we're next!
-						let mut vref = v.deref_mut();
-						BlockQueue::drain_verifying(&mut vref.verifying, &mut vref.verified, &mut vref.bad);
+						let mut verified = verification.verified.lock().unwrap();
+						let mut bad = verification.bad.lock().unwrap();
+						BlockQueue::drain_verifying(&mut verifying, &mut verified, &mut bad);
 						ready.set();
 					}
 				},
 				Err(err) => {
-					let mut v = verification.lock().unwrap();
+					let mut verifying = verification.verifying.lock().unwrap();
+					let mut verified = verification.verified.lock().unwrap();
+					let mut bad = verification.bad.lock().unwrap();
 					warn!(target: "client", "Stage 2 block verification failed for {}\nError: {:?}", block_hash, err);
-					v.bad.insert(block_hash.clone());
-					v.verifying.retain(|e| e.hash != block_hash);
-					let mut vref = v.deref_mut();
-					BlockQueue::drain_verifying(&mut vref.verifying, &mut vref.verified, &mut vref.bad);
+					bad.insert(block_hash.clone());
+					verifying.retain(|e| e.hash != block_hash);
+					BlockQueue::drain_verifying(&mut verifying, &mut verified, &mut bad);
 					ready.set();
 				}
 			}
@ -257,19 +265,21 @@ impl BlockQueue {
 	}

 	/// Clear the queue and stop verification activity.
-	pub fn clear(&mut self) {
-		let mut verification = self.verification.lock().unwrap();
-		verification.unverified.clear();
-		verification.verifying.clear();
-		verification.verified.clear();
+	pub fn clear(&self) {
+		let mut unverified = self.verification.unverified.lock().unwrap();
+		let mut verifying = self.verification.verifying.lock().unwrap();
+		let mut verified = self.verification.verified.lock().unwrap();
+		unverified.clear();
+		verifying.clear();
+		verified.clear();
 		self.processing.write().unwrap().clear();
 	}

-	/// Wait for queue to be empty
-	pub fn flush(&mut self) {
-		let mut verification = self.verification.lock().unwrap();
-		while !verification.unverified.is_empty() || !verification.verifying.is_empty() {
-			verification = self.empty.wait(verification).unwrap();
+	/// Wait for unverified queue to be empty
+	pub fn flush(&self) {
+		let mut unverified = self.verification.unverified.lock().unwrap();
+		while !unverified.is_empty() || !self.verification.verifying.lock().unwrap().is_empty() {
+			unverified = self.empty.wait(unverified).unwrap();
 		}
 	}

@ -278,27 +288,28 @@ impl BlockQueue {
 		if self.processing.read().unwrap().contains(&hash) {
 			return BlockStatus::Queued;
 		}
-		if self.verification.lock().unwrap().bad.contains(&hash) {
+		if self.verification.bad.lock().unwrap().contains(&hash) {
 			return BlockStatus::Bad;
 		}
 		BlockStatus::Unknown
 	}

 	/// Add a block to the queue.
-	pub fn import_block(&mut self, bytes: Bytes) -> ImportResult {
+	pub fn import_block(&self, bytes: Bytes) -> ImportResult {
 		let header = BlockView::new(&bytes).header();
 		let h = header.hash();
-		if self.processing.read().unwrap().contains(&h) {
-			return Err(x!(ImportError::AlreadyQueued));
-		}
 		{
-			let mut verification = self.verification.lock().unwrap();
-			if verification.bad.contains(&h) {
+			if self.processing.read().unwrap().contains(&h) {
+				return Err(x!(ImportError::AlreadyQueued));
+			}
+
+			let mut bad = self.verification.bad.lock().unwrap();
+			if bad.contains(&h) {
 				return Err(x!(ImportError::KnownBad));
 			}

-			if verification.bad.contains(&header.parent_hash) {
-				verification.bad.insert(h.clone());
+			if bad.contains(&header.parent_hash) {
+				bad.insert(h.clone());
 				return Err(x!(ImportError::KnownBad));
 			}
 		}
@ -306,48 +317,47 @@ impl BlockQueue {
 		match verify_block_basic(&header, &bytes, self.engine.deref().deref()) {
 			Ok(()) => {
 				self.processing.write().unwrap().insert(h.clone());
-				self.verification.lock().unwrap().unverified.push_back(UnverifiedBlock { header: header, bytes: bytes });
+				self.verification.unverified.lock().unwrap().push_back(UnverifiedBlock { header: header, bytes: bytes });
 				self.more_to_verify.notify_all();
 				Ok(h)
 			},
 			Err(err) => {
 				warn!(target: "client", "Stage 1 block verification failed for {}\nError: {:?}", BlockView::new(&bytes).header_view().sha3(), err);
-				self.verification.lock().unwrap().bad.insert(h.clone());
+				self.verification.bad.lock().unwrap().insert(h.clone());
 				Err(err)
 			}
 		}
 	}

 	/// Mark given block and all its children as bad. Stops verification.
-	pub fn mark_as_bad(&mut self, block_hashes: &[H256]) {
+	pub fn mark_as_bad(&self, block_hashes: &[H256]) {
 		if block_hashes.is_empty() {
 			return;
 		}
-		let mut verification_lock = self.verification.lock().unwrap();
+		let mut verified_lock = self.verification.verified.lock().unwrap();
+		let mut verified = verified_lock.deref_mut();
+		let mut bad = self.verification.bad.lock().unwrap();
 		let mut processing = self.processing.write().unwrap();
-
-		let mut verification = verification_lock.deref_mut();
-
-		verification.bad.reserve(block_hashes.len());
+		bad.reserve(block_hashes.len());
 		for hash in block_hashes {
-			verification.bad.insert(hash.clone());
+			bad.insert(hash.clone());
 			processing.remove(&hash);
 		}

 		let mut new_verified = VecDeque::new();
-		for block in verification.verified.drain(..) {
-			if verification.bad.contains(&block.header.parent_hash) {
-				verification.bad.insert(block.header.hash());
+		for block in verified.drain(..) {
+			if bad.contains(&block.header.parent_hash) {
+				bad.insert(block.header.hash());
 				processing.remove(&block.header.hash());
 			} else {
 				new_verified.push_back(block);
 			}
 		}
-		verification.verified = new_verified;
+		*verified = new_verified;
 	}

 	/// Mark given block as processed
-	pub fn mark_as_good(&mut self, block_hashes: &[H256]) {
+	pub fn mark_as_good(&self, block_hashes: &[H256]) {
 		if block_hashes.is_empty() {
 			return;
 		}
@ -358,16 +368,16 @@ impl BlockQueue {
 	}

 	/// Removes up to `max` verified blocks from the queue
-	pub fn drain(&mut self, max: usize) -> Vec<PreverifiedBlock> {
-		let mut verification = self.verification.lock().unwrap();
-		let count = min(max, verification.verified.len());
+	pub fn drain(&self, max: usize) -> Vec<PreverifiedBlock> {
+		let mut verified = self.verification.verified.lock().unwrap();
+		let count = min(max, verified.len());
 		let mut result = Vec::with_capacity(count);
 		for _ in 0..count {
-			let block = verification.verified.pop_front().unwrap();
+			let block = verified.pop_front().unwrap();
 			result.push(block);
 		}
 		self.ready_signal.reset();
-		if !verification.verified.is_empty() {
+		if !verified.is_empty() {
 			self.ready_signal.set();
 		}
 		result
@ -375,17 +385,28 @@ impl BlockQueue {

 	/// Get queue status.
 	pub fn queue_info(&self) -> BlockQueueInfo {
-		let verification = self.verification.lock().unwrap();
+		let (unverified_len, unverified_bytes) = {
+			let v = self.verification.unverified.lock().unwrap();
+			(v.len(), v.heap_size_of_children())
+		};
+		let (verifying_len, verifying_bytes) = {
+			let v = self.verification.verifying.lock().unwrap();
+			(v.len(), v.heap_size_of_children())
+		};
+		let (verified_len, verified_bytes) = {
+			let v = self.verification.verified.lock().unwrap();
+			(v.len(), v.heap_size_of_children())
+		};
 		BlockQueueInfo {
-			verified_queue_size: verification.verified.len(),
-			unverified_queue_size: verification.unverified.len(),
-			verifying_queue_size: verification.verifying.len(),
+			unverified_queue_size: unverified_len,
+			verifying_queue_size: verifying_len,
+			verified_queue_size: verified_len,
 			max_queue_size: self.max_queue_size,
 			max_mem_use: self.max_mem_use,
 			mem_used:
-				verification.unverified.heap_size_of_children()
-				+ verification.verifying.heap_size_of_children()
-				+ verification.verified.heap_size_of_children(),
+				unverified_bytes
+				+ verifying_bytes
+				+ verified_bytes
 				// TODO: https://github.com/servo/heapsize/pull/50
 				//+ self.processing.read().unwrap().heap_size_of_children(),
 		}
@ -393,10 +414,9 @@ impl BlockQueue {

 	pub fn collect_garbage(&self) {
 		{
-			let mut verification = self.verification.lock().unwrap();
-			verification.unverified.shrink_to_fit();
-			verification.verifying.shrink_to_fit();
-			verification.verified.shrink_to_fit();
+			self.verification.unverified.lock().unwrap().shrink_to_fit();
+			self.verification.verifying.lock().unwrap().shrink_to_fit();
+			self.verification.verified.lock().unwrap().shrink_to_fit();
 		}
 		self.processing.write().unwrap().shrink_to_fit();
 	}
@ -444,7 +464,7 @@ mod tests {

 	#[test]
 	fn can_import_blocks() {
-		let mut queue = get_test_queue();
+		let queue = get_test_queue();
 		if let Err(e) = queue.import_block(get_good_dummy_block()) {
 			panic!("error importing block that is valid by definition({:?})", e);
 		}
@ -452,7 +472,7 @@ mod tests {

 	#[test]
 	fn returns_error_for_duplicates() {
-		let mut queue = get_test_queue();
+		let queue = get_test_queue();
 		if let Err(e) = queue.import_block(get_good_dummy_block()) {
 			panic!("error importing block that is valid by definition({:?})", e);
 		}
@ -471,7 +491,7 @@ mod tests {

 	#[test]
 	fn returns_ok_for_drained_duplicates() {
-		let mut queue = get_test_queue();
+		let queue = get_test_queue();
 		let block = get_good_dummy_block();
 		let hash = BlockView::new(&block).header().hash().clone();
 		if let Err(e) = queue.import_block(block) {
@ -488,7 +508,7 @@ mod tests {

 	#[test]
 	fn returns_empty_once_finished() {
-		let mut queue = get_test_queue();
+		let queue = get_test_queue();
 		queue.import_block(get_good_dummy_block()).expect("error importing block that is valid by definition");
 		queue.flush();
 		queue.drain(1);
--- a/ethcore/src/blockchain/blockchain.rs
+++ b/ethcore/src/blockchain/blockchain.rs
@ -16,6 +16,7 @@

 //! Blockchain database.

+use std::sync::atomic::{AtomicUsize, Ordering as AtomicOrder};
 use util::*;
 use header::*;
 use extras::*;
@ -134,8 +135,9 @@ struct CacheManager {
 ///
 /// **Does not do input data verification.**
 pub struct BlockChain {
-	pref_cache_size: usize,
-	max_cache_size: usize,
+	// All locks must be captured in the order declared here.
+	pref_cache_size: AtomicUsize,
+	max_cache_size: AtomicUsize,

 	best_block: RwLock<BestBlock>,

@ -157,6 +159,8 @@ pub struct BlockChain {

 	// blooms indexing
 	bloom_indexer: BloomIndexer,
+
+	insert_lock: Mutex<()>
 }

 impl FilterDataSource for BlockChain {
@ -262,8 +266,8 @@ impl BlockChain {
 		(0..COLLECTION_QUEUE_SIZE).foreach(|_| cache_man.cache_usage.push_back(HashSet::new()));

 		let bc = BlockChain {
-			pref_cache_size: config.pref_cache_size,
-			max_cache_size: config.max_cache_size,
+			pref_cache_size: AtomicUsize::new(config.pref_cache_size),
+			max_cache_size: AtomicUsize::new(config.max_cache_size),
 			best_block: RwLock::new(BestBlock::default()),
 			blocks: RwLock::new(HashMap::new()),
 			block_details: RwLock::new(HashMap::new()),
@ -275,7 +279,8 @@ impl BlockChain {
 			extras_db: extras_db,
 			blocks_db: blocks_db,
 			cache_man: RwLock::new(cache_man),
-			bloom_indexer: BloomIndexer::new(BLOOM_INDEX_SIZE, BLOOM_LEVELS)
+			bloom_indexer: BloomIndexer::new(BLOOM_INDEX_SIZE, BLOOM_LEVELS),
+			insert_lock: Mutex::new(()),
 		};

 		// load best block
@ -318,9 +323,9 @@ impl BlockChain {
 	}

 	/// Set the cache configuration.
-	pub fn configure_cache(&mut self, pref_cache_size: usize, max_cache_size: usize) {
-		self.pref_cache_size = pref_cache_size;
-		self.max_cache_size = max_cache_size;
+	pub fn configure_cache(&self, pref_cache_size: usize, max_cache_size: usize) {
+		self.pref_cache_size.store(pref_cache_size, AtomicOrder::Relaxed);
+		self.max_cache_size.store(max_cache_size, AtomicOrder::Relaxed);
 	}

 	/// Returns a tree route between `from` and `to`, which is a tuple of:
@ -424,6 +429,7 @@ impl BlockChain {
 			return ImportRoute::none();
 		}

+		let _lock = self.insert_lock.lock();
 		// store block in db
 		self.blocks_db.put(&hash, &bytes).unwrap();

@ -446,48 +452,58 @@ impl BlockChain {
 		let batch = DBTransaction::new();
 		batch.put(b"best", &update.info.hash).unwrap();

-		// update best block
-		let mut best_block = self.best_block.write().unwrap();
-		match update.info.location {
-			BlockLocation::Branch => (),
-			_ => {
-				*best_block = BestBlock {
-					hash: update.info.hash,
-					number: update.info.number,
-					total_difficulty: update.info.total_difficulty
-				};
+		{
+			let mut write_details = self.block_details.write().unwrap();
+			for (hash, details) in update.block_details.into_iter() {
+				batch.put_extras(&hash, &details);
+				self.note_used(CacheID::Extras(ExtrasIndex::BlockDetails, hash.clone()));
+				write_details.insert(hash, details);
 			}
 		}

-		let mut write_hashes = self.block_hashes.write().unwrap();
-		for (number, hash) in &update.block_hashes {
-			batch.put_extras(number, hash);
-			write_hashes.remove(number);
+		{
+			let mut write_receipts = self.block_receipts.write().unwrap();
+			for (hash, receipt) in &update.block_receipts {
+				batch.put_extras(hash, receipt);
+				write_receipts.remove(hash);
+			}
 		}

-		let mut write_details = self.block_details.write().unwrap();
-		for (hash, details) in update.block_details.into_iter() {
-			batch.put_extras(&hash, &details);
-			write_details.insert(hash.clone(), details);
-			self.note_used(CacheID::Extras(ExtrasIndex::BlockDetails, hash));
+		{
+			let mut write_blocks_blooms = self.blocks_blooms.write().unwrap();
+			for (bloom_hash, blocks_bloom) in &update.blocks_blooms {
+				batch.put_extras(bloom_hash, blocks_bloom);
+				write_blocks_blooms.remove(bloom_hash);
+			}
 		}

-		let mut write_receipts = self.block_receipts.write().unwrap();
-		for (hash, receipt) in &update.block_receipts {
-			batch.put_extras(hash, receipt);
-			write_receipts.remove(hash);
-		}
+		// These cached values must be updated last and togeterh
+		{
+			let mut best_block = self.best_block.write().unwrap();
+			let mut write_hashes = self.block_hashes.write().unwrap();
+			let mut write_txs = self.transaction_addresses.write().unwrap();

-		let mut write_txs = self.transaction_addresses.write().unwrap();
-		for (hash, tx_address) in &update.transactions_addresses {
-			batch.put_extras(hash, tx_address);
-			write_txs.remove(hash);
-		}
+			// update best block
+			match update.info.location {
+				BlockLocation::Branch => (),
+				_ => {
+					*best_block = BestBlock {
+						hash: update.info.hash,
+						number: update.info.number,
+						total_difficulty: update.info.total_difficulty
+					};
+				}
+			}

-		let mut write_blocks_blooms = self.blocks_blooms.write().unwrap();
-		for (bloom_hash, blocks_bloom) in &update.blocks_blooms {
-			batch.put_extras(bloom_hash, blocks_bloom);
-			write_blocks_blooms.remove(bloom_hash);
+			for (number, hash) in &update.block_hashes {
+				batch.put_extras(number, hash);
+				write_hashes.remove(number);
+			}
+
+			for (hash, tx_address) in &update.transactions_addresses {
+				batch.put_extras(hash, tx_address);
+				write_txs.remove(hash);
+			}
 		}

 		// update extras database
@ -781,11 +797,10 @@ impl BlockChain {

 	/// Ticks our cache system and throws out any old data.
 	pub fn collect_garbage(&self) {
-		if self.cache_size().total() < self.pref_cache_size { return; }
+		if self.cache_size().total() < self.pref_cache_size.load(AtomicOrder::Relaxed) { return; }

 		for _ in 0..COLLECTION_QUEUE_SIZE {
 			{
-				let mut cache_man = self.cache_man.write().unwrap();
 				let mut blocks = self.blocks.write().unwrap();
 				let mut block_details = self.block_details.write().unwrap();
 				let mut block_hashes = self.block_hashes.write().unwrap();
@ -793,6 +808,7 @@ impl BlockChain {
 				let mut block_logs = self.block_logs.write().unwrap();
 				let mut blocks_blooms = self.blocks_blooms.write().unwrap();
 				let mut block_receipts = self.block_receipts.write().unwrap();
+				let mut cache_man = self.cache_man.write().unwrap();

 				for id in cache_man.cache_usage.pop_back().unwrap().into_iter() {
 					cache_man.in_use.remove(&id);
@ -819,7 +835,7 @@ impl BlockChain {
 				blocks_blooms.shrink_to_fit();
 				block_receipts.shrink_to_fit();
 			}
-			if self.cache_size().total() < self.max_cache_size { break; }
+			if self.cache_size().total() < self.max_cache_size.load(AtomicOrder::Relaxed) { break; }
 		}

 		// TODO: m_lastCollection = chrono::system_clock::now();
@ -891,7 +907,7 @@ mod tests {
 	}

 	#[test]
-	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
+	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
 	fn test_find_uncles() {
 		let mut canon_chain = ChainGenerator::default();
 		let mut finalizer = BlockFinalizer::default();
@ -929,7 +945,7 @@ mod tests {
 	}

 	#[test]
-	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
+	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
 	fn test_small_fork() {
 		let mut canon_chain = ChainGenerator::default();
 		let mut finalizer = BlockFinalizer::default();
--- a/ethcore/src/blockchain/mod.rs
+++ b/ethcore/src/blockchain/mod.rs
@ -23,9 +23,9 @@ mod bloom_indexer;
 mod cache;
 mod tree_route;
 mod update;
+mod import_route;
 #[cfg(test)]
 mod generator;
-mod import_route;

 pub use self::blockchain::{BlockProvider, BlockChain, BlockChainConfig};
 pub use self::cache::CacheSize;
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@ -19,7 +19,6 @@
 use std::marker::PhantomData;
 use util::*;
 use util::panics::*;
-use blockchain::{BlockChain, BlockProvider};
 use views::BlockView;
 use error::*;
 use header::{BlockNumber};
@ -27,7 +26,6 @@ use state::State;
 use spec::Spec;
 use engine::Engine;
 use views::HeaderView;
-use block_queue::BlockQueue;
 use service::{NetSyncMessage, SyncMessage};
 use env_info::LastHashes;
 use verification::*;
@ -36,33 +34,10 @@ use transaction::{LocalizedTransaction, SignedTransaction};
 use extras::TransactionAddress;
 use filter::Filter;
 use log_entry::LocalizedLogEntry;
-use util::keys::store::SecretStore;
-pub use block_queue::{BlockQueueConfig, BlockQueueInfo};
-pub use blockchain::{TreeRoute, BlockChainConfig, CacheSize as BlockChainCacheSize};
-
-/// Uniquely identifies block.
-#[derive(Debug, PartialEq, Clone)]
-pub enum BlockId {
-	/// Block's sha3.
-	/// Querying by hash is always faster.
-	Hash(H256),
-	/// Block number within canon blockchain.
-	Number(BlockNumber),
-	/// Earliest block (genesis).
-	Earliest,
-	/// Latest mined block.
-	Latest
-}
-
-/// Uniquely identifies transaction.
-#[derive(Debug, PartialEq, Clone)]
-pub enum TransactionId {
-	/// Transaction's sha3.
-	Hash(H256),
-	/// Block id and transaction index within this block.
-	/// Querying by block position is always faster.
-	Location(BlockId, usize)
-}
+use block_queue::{BlockQueue, BlockQueueInfo};
+use blockchain::{BlockChain, BlockProvider, TreeRoute};
+use client::{BlockId, TransactionId, ClientConfig, BlockChainClient};
+pub use blockchain::CacheSize as BlockChainCacheSize;

 /// General block status
 #[derive(Debug, Eq, PartialEq)]
@ -77,30 +52,6 @@ pub enum BlockStatus {
 	Unknown,
 }

-/// Client configuration. Includes configs for all sub-systems.
-#[derive(Debug)]
-pub struct ClientConfig {
-	/// Block queue configuration.
-	pub queue: BlockQueueConfig,
-	/// Blockchain configuration.
-	pub blockchain: BlockChainConfig,
-	/// Prefer journal rather than archive.
-	pub prefer_journal: bool,
-	/// The name of the client instance.
-	pub name: String,
-}
-
-impl Default for ClientConfig {
-	fn default() -> ClientConfig {
-		ClientConfig {
-			queue: Default::default(),
-			blockchain: Default::default(),
-			prefer_journal: false,
-			name: Default::default(),
-		}
-	}
-}
-
 /// Information about the blockchain gathered together.
 #[derive(Debug)]
 pub struct BlockChainInfo {
@ -122,79 +73,8 @@ impl fmt::Display for BlockChainInfo {
 	}
 }

-/// Blockchain database client. Owns and manages a blockchain and a block queue.
-pub trait BlockChainClient : Sync + Send {
-	/// Get raw block header data by block id.
-	fn block_header(&self, id: BlockId) -> Option<Bytes>;
-
-	/// Get raw block body data by block id.
-	/// Block body is an RLP list of two items: uncles and transactions.
-	fn block_body(&self, id: BlockId) -> Option<Bytes>;
-
-	/// Get raw block data by block header hash.
-	fn block(&self, id: BlockId) -> Option<Bytes>;
-
-	/// Get block status by block header hash.
-	fn block_status(&self, id: BlockId) -> BlockStatus;
-
-	/// Get block total difficulty.
-	fn block_total_difficulty(&self, id: BlockId) -> Option<U256>;
-
-	/// Get address nonce.
-	fn nonce(&self, address: &Address) -> U256;
-
-	/// Get block hash.
-	fn block_hash(&self, id: BlockId) -> Option<H256>;
-
-	/// Get address code.
-	fn code(&self, address: &Address) -> Option<Bytes>;
-
-	/// Get transaction with given hash.
-	fn transaction(&self, id: TransactionId) -> Option<LocalizedTransaction>;
-
-	/// Get a tree route between `from` and `to`.
-	/// See `BlockChain::tree_route`.
-	fn tree_route(&self, from: &H256, to: &H256) -> Option<TreeRoute>;
-
-	/// Get latest state node
-	fn state_data(&self, hash: &H256) -> Option<Bytes>;
-
-	/// Get raw block receipts data by block header hash.
-	fn block_receipts(&self, hash: &H256) -> Option<Bytes>;
-
-	/// Import a block into the blockchain.
-	fn import_block(&self, bytes: Bytes) -> ImportResult;
-
-	/// Get block queue information.
-	fn queue_info(&self) -> BlockQueueInfo;
-
-	/// Clear block queue and abort all import activity.
-	fn clear_queue(&self);
-
-	/// Get blockchain information.
-	fn chain_info(&self) -> BlockChainInfo;
-
-	/// Get the best block header.
-	fn best_block_header(&self) -> Bytes {
-		self.block_header(BlockId::Hash(self.chain_info().best_block_hash)).unwrap()
-	}
-
-	/// Returns numbers of blocks containing given bloom.
-	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockId, to_block: BlockId) -> Option<Vec<BlockNumber>>;
-
-	/// Returns logs matching given filter.
-	fn logs(&self, filter: Filter) -> Vec<LocalizedLogEntry>;
-
-	/// Returns ClosedBlock prepared for sealing.
-	fn prepare_sealing(&self, author: Address, extra_data: Bytes, transactions: Vec<SignedTransaction>) -> Option<ClosedBlock>;
-
-	/// Attempts to seal given block. Returns `SealedBlock` on success and the same block in case of error.
-	fn try_seal(&self, block: ClosedBlock, seal: Vec<Bytes>) -> Result<SealedBlock, ClosedBlock>;
-
-}
-
-#[derive(Default, Clone, Debug, Eq, PartialEq)]
 /// Report on the status of a client.
+#[derive(Default, Clone, Debug, Eq, PartialEq)]
 pub struct ClientReport {
 	/// How many blocks have been imported so far.
 	pub blocks_imported: usize,
@ -218,15 +98,14 @@ impl ClientReport {
 /// Blockchain database client backed by a persistent database. Owns and manages a blockchain and a block queue.
 /// Call `import_block()` to import a block asynchronously; `flush_queue()` flushes the queue.
 pub struct Client<V = CanonVerifier> where V: Verifier {
-	chain: Arc<RwLock<BlockChain>>,
+	chain: Arc<BlockChain>,
 	engine: Arc<Box<Engine>>,
 	state_db: Mutex<JournalDB>,
-	block_queue: RwLock<BlockQueue>,
+	block_queue: BlockQueue,
 	report: RwLock<ClientReport>,
 	import_lock: Mutex<()>,
 	panic_handler: Arc<PanicHandler>,
 	verifier: PhantomData<V>,
-	secret_store: Arc<RwLock<SecretStore>>,
 }

 const HISTORY: u64 = 1000;
@ -248,7 +127,7 @@ impl<V> Client<V> where V: Verifier {
 		dir.push(format!("v{}-sec-{}", CLIENT_DB_VER_STR, if config.prefer_journal { "pruned" } else { "archive" }));
 		let path = dir.as_path();
 		let gb = spec.genesis_block();
-		let chain = Arc::new(RwLock::new(BlockChain::new(config.blockchain, &gb, path)));
+		let chain = Arc::new(BlockChain::new(config.blockchain, &gb, path));
 		let mut state_path = path.to_path_buf();
 		state_path.push("state");

@ -262,34 +141,29 @@ impl<V> Client<V> where V: Verifier {
 		let panic_handler = PanicHandler::new_in_arc();
 		panic_handler.forward_from(&block_queue);

-		let secret_store = Arc::new(RwLock::new(SecretStore::new()));
-		secret_store.write().unwrap().try_import_existing();
-
 		Ok(Arc::new(Client {
 			chain: chain,
 			engine: engine,
 			state_db: Mutex::new(state_db),
-			block_queue: RwLock::new(block_queue),
+			block_queue: block_queue,
 			report: RwLock::new(Default::default()),
 			import_lock: Mutex::new(()),
 			panic_handler: panic_handler,
 			verifier: PhantomData,
-			secret_store: secret_store,
 		}))
 	}

 	/// Flush the block import queue.
 	pub fn flush_queue(&self) {
-		self.block_queue.write().unwrap().flush();
+		self.block_queue.flush();
 	}

 	fn build_last_hashes(&self, parent_hash: H256) -> LastHashes {
 		let mut last_hashes = LastHashes::new();
 		last_hashes.resize(256, H256::new());
 		last_hashes[0] = parent_hash;
-		let chain = self.chain.read().unwrap();
 		for i in 0..255 {
-			match chain.block_details(&last_hashes[i]) {
+			match self.chain.block_details(&last_hashes[i]) {
 				Some(details) => {
 					last_hashes[i + 1] = details.parent.clone();
 				},
@ -299,31 +173,26 @@ impl<V> Client<V> where V: Verifier {
 		last_hashes
 	}

-	/// Secret store (key manager)
-	pub fn secret_store(&self) -> &Arc<RwLock<SecretStore>> {
-		&self.secret_store
-	}
-
 	fn check_and_close_block(&self, block: &PreverifiedBlock) -> Result<ClosedBlock, ()> {
 		let engine = self.engine.deref().deref();
 		let header = &block.header;

 		// Check the block isn't so old we won't be able to enact it.
-		let best_block_number = self.chain.read().unwrap().best_block_number();
+		let best_block_number = self.chain.best_block_number();
 		if best_block_number >= HISTORY && header.number() <= best_block_number - HISTORY {
 			warn!(target: "client", "Block import failed for #{} ({})\nBlock is ancient (current best block: #{}).", header.number(), header.hash(), best_block_number);
 			return Err(());
 		}

 		// Verify Block Family
-		let verify_family_result = V::verify_block_family(&header, &block.bytes, engine, self.chain.read().unwrap().deref());
+		let verify_family_result = V::verify_block_family(&header, &block.bytes, engine, self.chain.deref());
 		if let Err(e) = verify_family_result {
 			warn!(target: "client", "Stage 3 block verification failed for #{} ({})\nError: {:?}", header.number(), header.hash(), e);
 			return Err(());
 		};

 		// Check if Parent is in chain
-		let chain_has_parent = self.chain.read().unwrap().block_header(&header.parent_hash);
+		let chain_has_parent = self.chain.block_header(&header.parent_hash);
 		if let None = chain_has_parent {
 			warn!(target: "client", "Block import failed for #{} ({}): Parent not found ({}) ", header.number(), header.hash(), header.parent_hash);
 			return Err(());
@ -358,7 +227,7 @@ impl<V> Client<V> where V: Verifier {
 		let mut bad_blocks = HashSet::new();

 		let _import_lock = self.import_lock.lock();
-		let blocks = self.block_queue.write().unwrap().drain(max_blocks_to_import);
+		let blocks = self.block_queue.drain(max_blocks_to_import);

 		let original_best = self.chain_info().best_block_hash;

@ -379,8 +248,7 @@ impl<V> Client<V> where V: Verifier {
 			// Are we committing an era?
 			let ancient = if header.number() >= HISTORY {
 				let n = header.number() - HISTORY;
-				let chain = self.chain.read().unwrap();
-				Some((n, chain.block_hash(n).unwrap()))
+				Some((n, self.chain.block_hash(n).unwrap()))
 			} else {
 				None
 			};
@ -394,8 +262,7 @@ impl<V> Client<V> where V: Verifier {

 			// And update the chain after commit to prevent race conditions
 			// (when something is in chain but you are not able to fetch details)
-			self.chain.write().unwrap()
-				.insert_block(&block.bytes, receipts);
+			self.chain.insert_block(&block.bytes, receipts);

 			self.report.write().unwrap().accrue_block(&block);
 			trace!(target: "client", "Imported #{} ({})", header.number(), header.hash());
@ -405,18 +272,16 @@ impl<V> Client<V> where V: Verifier {
 		let bad_blocks = bad_blocks.into_iter().collect::<Vec<H256>>();

 		{
-			let mut block_queue = self.block_queue.write().unwrap();
 			if !bad_blocks.is_empty() {
-				block_queue.mark_as_bad(&bad_blocks);
+				self.block_queue.mark_as_bad(&bad_blocks);
 			}
 			if !good_blocks.is_empty() {
-				block_queue.mark_as_good(&good_blocks);
+				self.block_queue.mark_as_good(&good_blocks);
 			}
 		}

 		{
-			let block_queue = self.block_queue.read().unwrap();
-			if !good_blocks.is_empty() && block_queue.queue_info().is_empty() {
+			if !good_blocks.is_empty() && self.block_queue.queue_info().is_empty() {
 				io.send(NetworkIoMessage::User(SyncMessage::NewChainBlocks {
 					good: good_blocks,
 					bad: bad_blocks,
@ -442,7 +307,7 @@ impl<V> Client<V> where V: Verifier {

 	/// Get info on the cache.
 	pub fn blockchain_cache_info(&self) -> BlockChainCacheSize {
-		self.chain.read().unwrap().cache_size()
+		self.chain.cache_size()
 	}

 	/// Get the report.
@ -454,13 +319,13 @@ impl<V> Client<V> where V: Verifier {

 	/// Tick the client.
 	pub fn tick(&self) {
-		self.chain.read().unwrap().collect_garbage();
-		self.block_queue.read().unwrap().collect_garbage();
+		self.chain.collect_garbage();
+		self.block_queue.collect_garbage();
 	}

 	/// Set up the cache behaviour.
 	pub fn configure_cache(&self, pref_cache_size: usize, max_cache_size: usize) {
-		self.chain.write().unwrap().configure_cache(pref_cache_size, max_cache_size);
+		self.chain.configure_cache(pref_cache_size, max_cache_size);
 	}

 	fn block_hash(chain: &BlockChain, id: BlockId) -> Option<H256> {
@ -475,9 +340,9 @@ impl<V> Client<V> where V: Verifier {
 	fn block_number(&self, id: BlockId) -> Option<BlockNumber> {
 		match id {
 			BlockId::Number(number) => Some(number),
-			BlockId::Hash(ref hash) => self.chain.read().unwrap().block_number(hash),
+			BlockId::Hash(ref hash) => self.chain.block_number(hash),
 			BlockId::Earliest => Some(0),
-			BlockId::Latest => Some(self.chain.read().unwrap().best_block_number())
+			BlockId::Latest => Some(self.chain.best_block_number())
 		}
 	}
 }
@ -494,19 +359,19 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {

 	fn prepare_sealing(&self, author: Address, extra_data: Bytes, transactions: Vec<SignedTransaction>) -> Option<ClosedBlock> {
 		let engine = self.engine.deref().deref();
-		let h = self.chain.read().unwrap().best_block_hash();
+		let h = self.chain.best_block_hash();

 		let mut b = OpenBlock::new(
 			engine,
 			self.state_db.lock().unwrap().clone(),
-			match self.chain.read().unwrap().block_header(&h) { Some(ref x) => x, None => { return None; } },
+			match self.chain.block_header(&h) { Some(ref x) => x, None => {return None} },
 			self.build_last_hashes(h.clone()),
 			author,
 			extra_data,
 		);

 		// Add uncles
-		self.chain.read().unwrap()
+		self.chain
 			.find_uncle_headers(&h, engine.maximum_uncle_age())
 			.unwrap()
 			.into_iter()
@ -535,14 +400,12 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 	}

 	fn block_header(&self, id: BlockId) -> Option<Bytes> {
-		let chain = self.chain.read().unwrap();
-		Self::block_hash(&chain, id).and_then(|hash| chain.block(&hash).map(|bytes| BlockView::new(&bytes).rlp().at(0).as_raw().to_vec()))
+		Self::block_hash(&self.chain, id).and_then(|hash| self.chain.block(&hash).map(|bytes| BlockView::new(&bytes).rlp().at(0).as_raw().to_vec()))
 	}

 	fn block_body(&self, id: BlockId) -> Option<Bytes> {
-		let chain = self.chain.read().unwrap();
-		Self::block_hash(&chain, id).and_then(|hash| {
-			chain.block(&hash).map(|bytes| {
+		Self::block_hash(&self.chain, id).and_then(|hash| {
+			self.chain.block(&hash).map(|bytes| {
 				let rlp = Rlp::new(&bytes);
 				let mut body = RlpStream::new_list(2);
 				body.append_raw(rlp.at(1).as_raw(), 1);
@ -553,24 +416,21 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 	}

 	fn block(&self, id: BlockId) -> Option<Bytes> {
-		let chain = self.chain.read().unwrap();
-		Self::block_hash(&chain, id).and_then(|hash| {
-			chain.block(&hash)
+		Self::block_hash(&self.chain, id).and_then(|hash| {
+			self.chain.block(&hash)
 		})
 	}

 	fn block_status(&self, id: BlockId) -> BlockStatus {
-		let chain = self.chain.read().unwrap();
-		match Self::block_hash(&chain, id) {
-			Some(ref hash) if chain.is_known(hash) => BlockStatus::InChain,
-			Some(hash) => self.block_queue.read().unwrap().block_status(&hash),
+		match Self::block_hash(&self.chain, id) {
+			Some(ref hash) if self.chain.is_known(hash) => BlockStatus::InChain,
+			Some(hash) => self.block_queue.block_status(&hash),
 			None => BlockStatus::Unknown
 		}
 	}

 	fn block_total_difficulty(&self, id: BlockId) -> Option<U256> {
-		let chain = self.chain.read().unwrap();
-		Self::block_hash(&chain, id).and_then(|hash| chain.block_details(&hash)).map(|d| d.total_difficulty)
+		Self::block_hash(&self.chain, id).and_then(|hash| self.chain.block_details(&hash)).map(|d| d.total_difficulty)
 	}

 	fn nonce(&self, address: &Address) -> U256 {
@ -578,8 +438,7 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 	}

 	fn block_hash(&self, id: BlockId) -> Option<H256> {
-		let chain = self.chain.read().unwrap();
-		Self::block_hash(&chain, id)
+		Self::block_hash(&self.chain, id)
 	}

 	fn code(&self, address: &Address) -> Option<Bytes> {
@ -587,20 +446,18 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 	}

 	fn transaction(&self, id: TransactionId) -> Option<LocalizedTransaction> {
-		let chain = self.chain.read().unwrap();
 		match id {
-			TransactionId::Hash(ref hash) => chain.transaction_address(hash),
-			TransactionId::Location(id, index) => Self::block_hash(&chain, id).map(|hash| TransactionAddress {
+			TransactionId::Hash(ref hash) => self.chain.transaction_address(hash),
+			TransactionId::Location(id, index) => Self::block_hash(&self.chain, id).map(|hash| TransactionAddress {
 				block_hash: hash,
 				index: index
 			})
-		}.and_then(|address| chain.transaction(&address))
+		}.and_then(|address| self.chain.transaction(&address))
 	}

 	fn tree_route(&self, from: &H256, to: &H256) -> Option<TreeRoute> {
-		let chain = self.chain.read().unwrap();
-		match chain.is_known(from) && chain.is_known(to) {
-			true => Some(chain.tree_route(from.clone(), to.clone())),
+		match self.chain.is_known(from) && self.chain.is_known(to) {
+			true => Some(self.chain.tree_route(from.clone(), to.clone())),
 			false => None
 		}
 	}
@ -616,43 +473,44 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 	fn import_block(&self, bytes: Bytes) -> ImportResult {
 		{
 			let header = BlockView::new(&bytes).header_view();
-			if self.chain.read().unwrap().is_known(&header.sha3()) {
+			if self.chain.is_known(&header.sha3()) {
 				return Err(x!(ImportError::AlreadyInChain));
 			}
 			if self.block_status(BlockId::Hash(header.parent_hash())) == BlockStatus::Unknown {
 				return Err(x!(BlockError::UnknownParent(header.parent_hash())));
 			}
 		}
-		self.block_queue.write().unwrap().import_block(bytes)
+		self.block_queue.import_block(bytes)
 	}

 	fn queue_info(&self) -> BlockQueueInfo {
-		self.block_queue.read().unwrap().queue_info()
+		self.block_queue.queue_info()
 	}

 	fn clear_queue(&self) {
-		self.block_queue.write().unwrap().clear();
+		self.block_queue.clear();
 	}

 	fn chain_info(&self) -> BlockChainInfo {
-		let chain = self.chain.read().unwrap();
 		BlockChainInfo {
-			total_difficulty: chain.best_block_total_difficulty(),
-			pending_total_difficulty: chain.best_block_total_difficulty(),
-			genesis_hash: chain.genesis_hash(),
-			best_block_hash: chain.best_block_hash(),
-			best_block_number: From::from(chain.best_block_number())
+			total_difficulty: self.chain.best_block_total_difficulty(),
+			pending_total_difficulty: self.chain.best_block_total_difficulty(),
+			genesis_hash: self.chain.genesis_hash(),
+			best_block_hash: self.chain.best_block_hash(),
+			best_block_number: From::from(self.chain.best_block_number())
 		}
 	}

 	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockId, to_block: BlockId) -> Option<Vec<BlockNumber>> {
 		match (self.block_number(from_block), self.block_number(to_block)) {
-			(Some(from), Some(to)) => Some(self.chain.read().unwrap().blocks_with_bloom(bloom, from, to)),
+			(Some(from), Some(to)) => Some(self.chain.blocks_with_bloom(bloom, from, to)),
 			_ => None
 		}
 	}

 	fn logs(&self, filter: Filter) -> Vec<LocalizedLogEntry> {
+		// TODO: lock blockchain only once
+
 		let mut blocks = filter.bloom_possibilities().iter()
 			.filter_map(|bloom| self.blocks_with_bloom(bloom, filter.from_block.clone(), filter.to_block.clone()))
 			.flat_map(|m| m)
@ -664,9 +522,9 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 		blocks.sort();

 		blocks.into_iter()
-			.filter_map(|number| self.chain.read().unwrap().block_hash(number).map(|hash| (number, hash)))
-			.filter_map(|(number, hash)| self.chain.read().unwrap().block_receipts(&hash).map(|r| (number, hash, r.receipts)))
-			.filter_map(|(number, hash, receipts)| self.chain.read().unwrap().block(&hash).map(|ref b| (number, hash, receipts, BlockView::new(b).transaction_hashes())))
+			.filter_map(|number| self.chain.block_hash(number).map(|hash| (number, hash)))
+			.filter_map(|(number, hash)| self.chain.block_receipts(&hash).map(|r| (number, hash, r.receipts)))
+			.filter_map(|(number, hash, receipts)| self.chain.block(&hash).map(|ref b| (number, hash, receipts, BlockView::new(b).transaction_hashes())))
 			.flat_map(|(number, hash, receipts, hashes)| {
 				let mut log_index = 0;
 				receipts.into_iter()
--- a/ethcore/src/client/config.rs
+++ b/ethcore/src/client/config.rs
@ -14,12 +14,18 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

-extern crate rustc_version;
+pub use block_queue::BlockQueueConfig;
+pub use blockchain::BlockChainConfig;

-use rustc_version::{version_meta, Channel};
-
-fn main() {
-	if let Channel::Nightly = version_meta().channel {
-		println!("cargo:rustc-cfg=nightly");
-	}
+/// Client configuration. Includes configs for all sub-systems.
+#[derive(Debug, Default)]
+pub struct ClientConfig {
+	/// Block queue configuration.
+	pub queue: BlockQueueConfig,
+	/// Blockchain configuration.
+	pub blockchain: BlockChainConfig,
+	/// Prefer journal rather than archive.
+	pub prefer_journal: bool,
+	/// The name of the client instance.
+	pub name: String,
 }
--- a/ethcore/src/client/ids.rs
+++ b/ethcore/src/client/ids.rs
@ -0,0 +1,44 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Unique identifiers.
+
+use util::hash::H256;
+use header::BlockNumber;
+
+/// Uniquely identifies block.
+#[derive(Debug, PartialEq, Clone)]
+pub enum BlockId {
+	/// Block's sha3.
+	/// Querying by hash is always faster.
+	Hash(H256),
+	/// Block number within canon blockchain.
+	Number(BlockNumber),
+	/// Earliest block (genesis).
+	Earliest,
+	/// Latest mined block.
+	Latest
+}
+
+/// Uniquely identifies transaction.
+#[derive(Debug, PartialEq, Clone)]
+pub enum TransactionId {
+	/// Transaction's sha3.
+	Hash(H256),
+	/// Block id and transaction index within this block.
+	/// Querying by block position is always faster.
+	Location(BlockId, usize)
+}
--- a/ethcore/src/client/mod.rs
+++ b/ethcore/src/client/mod.rs
@ -0,0 +1,112 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Blockchain database client.
+
+mod client;
+mod config;
+mod ids;
+mod test_client;
+
+pub use self::client::*;
+pub use self::config::{ClientConfig, BlockQueueConfig, BlockChainConfig};
+pub use self::ids::{BlockId, TransactionId};
+pub use self::test_client::{TestBlockChainClient, EachBlockWith};
+
+use util::bytes::Bytes;
+use util::hash::{Address, H256, H2048};
+use util::numbers::U256;
+use blockchain::TreeRoute;
+use block_queue::BlockQueueInfo;
+use block::{ClosedBlock, SealedBlock};
+use header::BlockNumber;
+use transaction::{LocalizedTransaction, SignedTransaction};
+use log_entry::LocalizedLogEntry;
+use filter::Filter;
+use error::{ImportResult};
+
+/// Blockchain database client. Owns and manages a blockchain and a block queue.
+pub trait BlockChainClient : Sync + Send {
+	/// Get raw block header data by block id.
+	fn block_header(&self, id: BlockId) -> Option<Bytes>;
+
+	/// Get raw block body data by block id.
+	/// Block body is an RLP list of two items: uncles and transactions.
+	fn block_body(&self, id: BlockId) -> Option<Bytes>;
+
+	/// Get raw block data by block header hash.
+	fn block(&self, id: BlockId) -> Option<Bytes>;
+
+	/// Get block status by block header hash.
+	fn block_status(&self, id: BlockId) -> BlockStatus;
+
+	/// Get block total difficulty.
+	fn block_total_difficulty(&self, id: BlockId) -> Option<U256>;
+
+	/// Get address nonce.
+	fn nonce(&self, address: &Address) -> U256;
+
+	/// Get block hash.
+	fn block_hash(&self, id: BlockId) -> Option<H256>;
+
+	/// Get address code.
+	fn code(&self, address: &Address) -> Option<Bytes>;
+
+	/// Get transaction with given hash.
+	fn transaction(&self, id: TransactionId) -> Option<LocalizedTransaction>;
+
+	/// Get a tree route between `from` and `to`.
+	/// See `BlockChain::tree_route`.
+	fn tree_route(&self, from: &H256, to: &H256) -> Option<TreeRoute>;
+
+	/// Get latest state node
+	fn state_data(&self, hash: &H256) -> Option<Bytes>;
+
+	/// Get raw block receipts data by block header hash.
+	fn block_receipts(&self, hash: &H256) -> Option<Bytes>;
+
+	/// Import a block into the blockchain.
+	fn import_block(&self, bytes: Bytes) -> ImportResult;
+
+	/// Get block queue information.
+	fn queue_info(&self) -> BlockQueueInfo;
+
+	/// Clear block queue and abort all import activity.
+	fn clear_queue(&self);
+
+	/// Get blockchain information.
+	fn chain_info(&self) -> BlockChainInfo;
+
+	/// Get the best block header.
+	fn best_block_header(&self) -> Bytes {
+		// TODO: lock blockchain only once
+		self.block_header(BlockId::Hash(self.chain_info().best_block_hash)).unwrap()
+	}
+
+	/// Returns numbers of blocks containing given bloom.
+	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockId, to_block: BlockId) -> Option<Vec<BlockNumber>>;
+
+	/// Returns logs matching given filter.
+	fn logs(&self, filter: Filter) -> Vec<LocalizedLogEntry>;
+
+	/// Returns ClosedBlock prepared for sealing.
+	fn prepare_sealing(&self, author: Address, extra_data: Bytes, transactions: Vec<SignedTransaction>) -> Option<ClosedBlock>;
+
+	/// Attempts to seal given block. Returns `SealedBlock` on success and the same block in case of error.
+	fn try_seal(&self, block: ClosedBlock, seal: Vec<Bytes>) -> Result<SealedBlock, ClosedBlock>;
+
+}
+
--- a/ethcore/src/client/test_client.rs
+++ b/ethcore/src/client/test_client.rs
@ -0,0 +1,336 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Test client.
+
+use util::*;
+use transaction::{Transaction, LocalizedTransaction, SignedTransaction, Action};
+use blockchain::TreeRoute;
+use client::{BlockChainClient, BlockChainInfo, BlockStatus, BlockId, TransactionId};
+use header::{Header as BlockHeader, BlockNumber};
+use filter::Filter;
+use log_entry::LocalizedLogEntry;
+use receipt::Receipt;
+use error::{ImportResult};
+use block_queue::BlockQueueInfo;
+use block::{SealedBlock, ClosedBlock};
+
+/// Test client.
+pub struct TestBlockChainClient {
+	/// Blocks.
+	pub blocks: RwLock<HashMap<H256, Bytes>>,
+	/// Mapping of numbers to hashes.
+ 	pub numbers: RwLock<HashMap<usize, H256>>,
+	/// Genesis block hash.
+	pub genesis_hash: H256,
+	/// Last block hash.
+	pub last_hash: RwLock<H256>,
+	/// Difficulty.
+	pub difficulty: RwLock<U256>,
+}
+
+#[derive(Clone)]
+/// Used for generating test client blocks.
+pub enum EachBlockWith {
+	/// Plain block.
+	Nothing,
+	/// Block with an uncle.
+	Uncle,
+	/// Block with a transaction.
+	Transaction,
+	/// Block with an uncle and transaction.
+	UncleAndTransaction
+}
+
+impl TestBlockChainClient {
+	/// Creates new test client.
+	pub fn new() -> TestBlockChainClient {
+
+		let mut client = TestBlockChainClient {
+			blocks: RwLock::new(HashMap::new()),
+			numbers: RwLock::new(HashMap::new()),
+			genesis_hash: H256::new(),
+			last_hash: RwLock::new(H256::new()),
+			difficulty: RwLock::new(From::from(0)),
+		};
+		client.add_blocks(1, EachBlockWith::Nothing); // add genesis block
+		client.genesis_hash = client.last_hash.read().unwrap().clone();
+		client
+	}
+
+	/// Add blocks to test client.
+	pub fn add_blocks(&mut self, count: usize, with: EachBlockWith) {
+		let len = self.numbers.read().unwrap().len();
+		for n in len..(len + count) {
+			let mut header = BlockHeader::new();
+			header.difficulty = From::from(n);
+			header.parent_hash = self.last_hash.read().unwrap().clone();
+			header.number = n as BlockNumber;
+			let uncles = match with {
+				EachBlockWith::Uncle | EachBlockWith::UncleAndTransaction => {
+					let mut uncles = RlpStream::new_list(1);
+					let mut uncle_header = BlockHeader::new();
+					uncle_header.difficulty = From::from(n);
+					uncle_header.parent_hash = self.last_hash.read().unwrap().clone();
+					uncle_header.number = n as BlockNumber;
+					uncles.append(&uncle_header);
+					header.uncles_hash = uncles.as_raw().sha3();
+					uncles
+				},
+				_ => RlpStream::new_list(0)
+			};
+			let txs = match with {
+				EachBlockWith::Transaction | EachBlockWith::UncleAndTransaction => {
+					let mut txs = RlpStream::new_list(1);
+					let keypair = KeyPair::create().unwrap();
+					let tx = Transaction {
+						action: Action::Create,
+						value: U256::from(100),
+						data: "3331600055".from_hex().unwrap(),
+						gas: U256::from(100_000),
+						gas_price: U256::one(),
+						nonce: U256::zero()
+					};
+					let signed_tx = tx.sign(&keypair.secret());
+					txs.append(&signed_tx);
+					txs.out()
+				},
+				_ => rlp::NULL_RLP.to_vec()
+			};
+
+			let mut rlp = RlpStream::new_list(3);
+			rlp.append(&header);
+			rlp.append_raw(&txs, 1);
+			rlp.append_raw(uncles.as_raw(), 1);
+			self.import_block(rlp.as_raw().to_vec()).unwrap();
+		}
+	}
+
+	/// TODO:
+	pub fn corrupt_block(&mut self, n: BlockNumber) {
+		let hash = self.block_hash(BlockId::Number(n)).unwrap();
+		let mut header: BlockHeader = decode(&self.block_header(BlockId::Number(n)).unwrap());
+		header.parent_hash = H256::new();
+		let mut rlp = RlpStream::new_list(3);
+		rlp.append(&header);
+		rlp.append_raw(&rlp::NULL_RLP, 1);
+		rlp.append_raw(&rlp::NULL_RLP, 1);
+		self.blocks.write().unwrap().insert(hash, rlp.out());
+	}
+
+	/// TODO:
+	pub fn block_hash_delta_minus(&mut self, delta: usize) -> H256 {
+		let blocks_read = self.numbers.read().unwrap();
+		let index = blocks_read.len() - delta;
+		blocks_read[&index].clone()
+	}
+
+	fn block_hash(&self, id: BlockId) -> Option<H256> {
+		match id {
+			BlockId::Hash(hash) => Some(hash),
+			BlockId::Number(n) => self.numbers.read().unwrap().get(&(n as usize)).cloned(),
+			BlockId::Earliest => self.numbers.read().unwrap().get(&0).cloned(),
+			BlockId::Latest => self.numbers.read().unwrap().get(&(self.numbers.read().unwrap().len() - 1)).cloned()
+		}
+	}
+}
+
+impl BlockChainClient for TestBlockChainClient {
+	fn block_total_difficulty(&self, _id: BlockId) -> Option<U256> {
+		Some(U256::zero())
+	}
+
+	fn block_hash(&self, _id: BlockId) -> Option<H256> {
+		unimplemented!();
+	}
+
+	fn nonce(&self, _address: &Address) -> U256 {
+		U256::zero()
+	}
+
+	fn code(&self, _address: &Address) -> Option<Bytes> {
+		unimplemented!();
+	}
+
+	fn transaction(&self, _id: TransactionId) -> Option<LocalizedTransaction> {
+		unimplemented!();
+	}
+
+	fn blocks_with_bloom(&self, _bloom: &H2048, _from_block: BlockId, _to_block: BlockId) -> Option<Vec<BlockNumber>> {
+		unimplemented!();
+	}
+
+	fn logs(&self, _filter: Filter) -> Vec<LocalizedLogEntry> {
+		unimplemented!();
+	}
+
+	fn prepare_sealing(&self, _author: Address, _extra_data: Bytes, _transactions: Vec<SignedTransaction>) -> Option<ClosedBlock> {
+		unimplemented!()
+	}
+
+	fn try_seal(&self, _block: ClosedBlock, _seal: Vec<Bytes>) -> Result<SealedBlock, ClosedBlock> {
+		unimplemented!()
+	}
+
+	fn block_header(&self, id: BlockId) -> Option<Bytes> {
+		self.block_hash(id).and_then(|hash| self.blocks.read().unwrap().get(&hash).map(|r| Rlp::new(r).at(0).as_raw().to_vec()))
+	}
+
+	fn block_body(&self, id: BlockId) -> Option<Bytes> {
+		self.block_hash(id).and_then(|hash| self.blocks.read().unwrap().get(&hash).map(|r| {
+			let mut stream = RlpStream::new_list(2);
+			stream.append_raw(Rlp::new(&r).at(1).as_raw(), 1);
+			stream.append_raw(Rlp::new(&r).at(2).as_raw(), 1);
+			stream.out()
+		}))
+	}
+
+	fn block(&self, id: BlockId) -> Option<Bytes> {
+		self.block_hash(id).and_then(|hash| self.blocks.read().unwrap().get(&hash).cloned())
+	}
+
+	fn block_status(&self, id: BlockId) -> BlockStatus {
+		match id {
+			BlockId::Number(number) if (number as usize) < self.blocks.read().unwrap().len() => BlockStatus::InChain,
+			BlockId::Hash(ref hash) if self.blocks.read().unwrap().get(hash).is_some() => BlockStatus::InChain,
+			_ => BlockStatus::Unknown
+		}
+	}
+
+	// works only if blocks are one after another 1 -> 2 -> 3
+	fn tree_route(&self, from: &H256, to: &H256) -> Option<TreeRoute> {
+		Some(TreeRoute {
+			ancestor: H256::new(),
+			index: 0,
+			blocks: {
+				let numbers_read = self.numbers.read().unwrap();
+				let mut adding = false;
+
+				let mut blocks = Vec::new();
+				for (_, hash) in numbers_read.iter().sort_by(|tuple1, tuple2| tuple1.0.cmp(tuple2.0)) {
+					if hash == to {
+						if adding {
+							blocks.push(hash.clone());
+						}
+						adding = false;
+						break;
+					}
+					if hash == from {
+						adding = true;
+					}
+					if adding {
+						blocks.push(hash.clone());
+					}
+				}
+				if adding { Vec::new() } else { blocks }
+			}
+		})
+	}
+
+	// TODO: returns just hashes instead of node state rlp(?)
+	fn state_data(&self, hash: &H256) -> Option<Bytes> {
+		// starts with 'f' ?
+		if *hash > H256::from("f000000000000000000000000000000000000000000000000000000000000000") {
+			let mut rlp = RlpStream::new();
+			rlp.append(&hash.clone());
+			return Some(rlp.out());
+		}
+		None
+	}
+
+	fn block_receipts(&self, hash: &H256) -> Option<Bytes> {
+		// starts with 'f' ?
+		if *hash > H256::from("f000000000000000000000000000000000000000000000000000000000000000") {
+			let receipt = Receipt::new(
+				H256::zero(),
+				U256::zero(),
+				vec![]);
+			let mut rlp = RlpStream::new();
+			rlp.append(&receipt);
+			return Some(rlp.out());
+		}
+		None
+	}
+
+	fn import_block(&self, b: Bytes) -> ImportResult {
+		let header = Rlp::new(&b).val_at::<BlockHeader>(0);
+		let h = header.hash();
+		let number: usize = header.number as usize;
+		if number > self.blocks.read().unwrap().len() {
+			panic!("Unexpected block number. Expected {}, got {}", self.blocks.read().unwrap().len(), number);
+		}
+		if number > 0 {
+			match self.blocks.read().unwrap().get(&header.parent_hash) {
+				Some(parent) => {
+					let parent = Rlp::new(parent).val_at::<BlockHeader>(0);
+					if parent.number != (header.number - 1) {
+						panic!("Unexpected block parent");
+					}
+				},
+				None => {
+					panic!("Unknown block parent {:?} for block {}", header.parent_hash, number);
+				}
+			}
+		}
+		let len = self.numbers.read().unwrap().len();
+		if number == len {
+			{
+				let mut difficulty = self.difficulty.write().unwrap();
+				*difficulty.deref_mut() = *difficulty.deref() + header.difficulty;
+			}
+			mem::replace(self.last_hash.write().unwrap().deref_mut(), h.clone());
+			self.blocks.write().unwrap().insert(h.clone(), b);
+			self.numbers.write().unwrap().insert(number, h.clone());
+			let mut parent_hash = header.parent_hash;
+			if number > 0 {
+				let mut n = number - 1;
+				while n > 0 && self.numbers.read().unwrap()[&n] != parent_hash {
+					*self.numbers.write().unwrap().get_mut(&n).unwrap() = parent_hash.clone();
+					n -= 1;
+					parent_hash = Rlp::new(&self.blocks.read().unwrap()[&parent_hash]).val_at::<BlockHeader>(0).parent_hash;
+				}
+			}
+		}
+		else {
+			self.blocks.write().unwrap().insert(h.clone(), b.to_vec());
+		}
+		Ok(h)
+	}
+
+	fn queue_info(&self) -> BlockQueueInfo {
+		BlockQueueInfo {
+			verified_queue_size: 0,
+			unverified_queue_size: 0,
+			verifying_queue_size: 0,
+			max_queue_size: 0,
+			max_mem_use: 0,
+			mem_used: 0,
+		}
+	}
+
+	fn clear_queue(&self) {
+	}
+
+	fn chain_info(&self) -> BlockChainInfo {
+		BlockChainInfo {
+			total_difficulty: *self.difficulty.read().unwrap(),
+			pending_total_difficulty: *self.difficulty.read().unwrap(),
+			genesis_hash: self.genesis_hash.clone(),
+			best_block_hash: self.last_hash.read().unwrap().clone(),
+			best_block_number: self.blocks.read().unwrap().len() as BlockNumber - 1,
+		}
+	}
+}
--- a/ethcore/src/ethereum/ethash.rs
+++ b/ethcore/src/ethereum/ethash.rs
@ -202,7 +202,7 @@ impl Engine for Ethash {
 	}
 }

-#[cfg_attr(all(nightly, feature="dev"), allow(wrong_self_convention))] // to_ethash should take self
+#[cfg_attr(feature="dev", allow(wrong_self_convention))] // to_ethash should take self
 impl Ethash {
 	fn calculate_difficuty(&self, header: &Header, parent: &Header) -> U256 {
 		const EXP_DIFF_PERIOD: u64 = 100000;
--- a/ethcore/src/evm/interpreter.rs
+++ b/ethcore/src/evm/interpreter.rs
@ -243,7 +243,7 @@ struct CodeReader<'a> {
 	code: &'a Bytes
 }

-#[cfg_attr(all(nightly, feature="dev"), allow(len_without_is_empty))]
+#[cfg_attr(feature="dev", allow(len_without_is_empty))]
 impl<'a> CodeReader<'a> {
 	/// Get `no_of_bytes` from code and convert to U256. Move PC
 	fn read(&mut self, no_of_bytes: usize) -> U256 {
@ -258,7 +258,7 @@ impl<'a> CodeReader<'a> {
 	}
 }

-#[cfg_attr(all(nightly, feature="dev"), allow(enum_variant_names))]
+#[cfg_attr(feature="dev", allow(enum_variant_names))]
 enum InstructionCost {
 	Gas(U256),
 	GasMem(U256, U256),
@ -347,7 +347,7 @@ impl evm::Evm for Interpreter {
 }

 impl Interpreter {
-	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
+	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
 	fn get_gas_cost_mem(&self,
 						ext: &evm::Ext,
 						instruction: Instruction,
--- a/ethcore/src/externalities.rs
+++ b/ethcore/src/externalities.rs
@ -188,7 +188,7 @@ impl<'a> Ext for Externalities<'a> {
 		self.state.code(address).unwrap_or_else(|| vec![])
 	}

-	#[cfg_attr(all(nightly, feature="dev"), allow(match_ref_pats))]
+	#[cfg_attr(feature="dev", allow(match_ref_pats))]
 	fn ret(&mut self, gas: &U256, data: &[u8]) -> Result<U256, evm::Error> {
 		match &mut self.output {
 			&mut OutputPolicy::Return(BytesRef::Fixed(ref mut slice)) => unsafe {
--- a/ethcore/src/lib.rs
+++ b/ethcore/src/lib.rs
@ -15,16 +15,16 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 #![warn(missing_docs)]
-#![cfg_attr(all(nightly, feature="dev"), feature(plugin))]
-#![cfg_attr(all(nightly, feature="dev"), plugin(clippy))]
+#![cfg_attr(feature="dev", feature(plugin))]
+#![cfg_attr(feature="dev", plugin(clippy))]

 // Clippy config
 // TODO [todr] not really sure
-#![cfg_attr(all(nightly, feature="dev"), allow(needless_range_loop))]
+#![cfg_attr(feature="dev", allow(needless_range_loop))]
 // Shorter than if-else
-#![cfg_attr(all(nightly, feature="dev"), allow(match_bool))]
+#![cfg_attr(feature="dev", allow(match_bool))]
 // Keeps consistency (all lines with `.clone()`) and helpful when changing ref to non-ref.
-#![cfg_attr(all(nightly, feature="dev"), allow(clone_on_copy))]
+#![cfg_attr(feature="dev", allow(clone_on_copy))]

 //! Ethcore library
 //!
@ -86,6 +86,7 @@ extern crate crossbeam;
 #[cfg(feature = "jit" )] extern crate evmjit;

 pub mod block;
+pub mod block_queue;
 pub mod client;
 pub mod error;
 pub mod ethereum;
@ -119,7 +120,6 @@ mod substate;
 mod executive;
 mod externalities;
 mod verification;
-mod block_queue;
 mod blockchain;

 #[cfg(test)]
--- a/ethcore/src/service.rs
+++ b/ethcore/src/service.rs
@ -119,7 +119,7 @@ impl IoHandler<NetSyncMessage> for ClientIoHandler {
 		}
 	}

-	#[cfg_attr(all(nightly, feature="dev"), allow(single_match))]
+	#[cfg_attr(feature="dev", allow(single_match))]
 	fn message(&self, io: &IoContext<NetSyncMessage>, net_message: &NetSyncMessage) {
 		if let UserMessage(ref message) = *net_message {
 			match *message {
--- a/ethcore/src/spec.rs
+++ b/ethcore/src/spec.rs
@ -99,7 +99,7 @@ pub struct Spec {
 	genesis_state: PodState,
 }

-#[cfg_attr(all(nightly, feature="dev"), allow(wrong_self_convention))] // because to_engine(self) should be to_engine(&self)
+#[cfg_attr(feature="dev", allow(wrong_self_convention))] // because to_engine(self) should be to_engine(&self)
 impl Spec {
 	/// Convert this object into a boxed Engine of the right underlying type.
 	// TODO avoid this hard-coded nastiness - use dynamic-linked plugin framework instead.
--- a/ethcore/src/state.rs
+++ b/ethcore/src/state.rs
@ -224,7 +224,7 @@ impl State {

 	/// Commit accounts to SecTrieDBMut. This is similar to cpp-ethereum's dev::eth::commit.
 	/// `accounts` is mutable because we may need to commit the code or storage and record that.
-	#[cfg_attr(all(nightly, feature="dev"), allow(match_ref_pats))]
+	#[cfg_attr(feature="dev", allow(match_ref_pats))]
 	pub fn commit_into(db: &mut HashDB, root: &mut H256, accounts: &mut HashMap<Address, Option<Account>>) {
 		// first, commit the sub trees.
 		// TODO: is this necessary or can we dispense with the `ref mut a` for just `a`?
--- a/ethcore/src/transaction.rs
+++ b/ethcore/src/transaction.rs
@ -80,7 +80,7 @@ impl Transaction {
 }

 impl FromJson for SignedTransaction {
-	#[cfg_attr(all(nightly, feature="dev"), allow(single_char_pattern))]
+	#[cfg_attr(feature="dev", allow(single_char_pattern))]
 	fn from_json(json: &Json) -> SignedTransaction {
 		let t = Transaction {
 			nonce: xjson!(&json["nonce"]),
--- a/hook.sh
+++ b/hook.sh
@ -1,3 +1,12 @@
 #!/bin/sh
-echo "#!/bin/sh\ncargo build --features dev-clippy && cargo test --no-run -p ethash -p ethcore-util -p ethcore -p ethsync -p ethcore-rpc -p parity -p ethminer --features dev-clippy" > ./.git/hooks/pre-push
-chmod +x ./.git/hooks/pre-push
+FILE=./.git/hooks/pre-push
+echo "#!/bin/sh\n" > $FILE
+# Exit on any error
+echo "set -e" >> $FILE
+# Run release build
+echo "cargo build --release --features dev" >> $FILE
+# Build tests
+echo "cargo test --no-run --features dev \\" >> $FILE
+echo "	-p ethash -p ethcore-util -p ethcore -p ethsync -p ethcore-rpc -p parity -p ethminer" >> $FILE
+echo "" >> $FILE
+chmod +x $FILE
--- a/miner/Cargo.toml
+++ b/miner/Cargo.toml
@ -21,4 +21,4 @@ clippy = { version = "0.0.44", optional = true }

 [features]
 default = []
-dev = []
+dev = ["clippy"]
--- a/parity/main.rs
+++ b/parity/main.rs
@ -17,8 +17,8 @@
 //! Ethcore client application.

 #![warn(missing_docs)]
-#![cfg_attr(all(nightly, feature="dev"), feature(plugin))]
-#![cfg_attr(all(nightly, feature="dev"), plugin(clippy))]
+#![cfg_attr(feature="dev", feature(plugin))]
+#![cfg_attr(feature="dev", plugin(clippy))]
 extern crate docopt;
 extern crate rustc_serialize;
 extern crate ethcore_util as util;
@ -38,7 +38,7 @@ extern crate rpassword;
 #[cfg(feature = "rpc")]
 extern crate ethcore_rpc as rpc;

-use std::net::{SocketAddr};
+use std::net::{SocketAddr, IpAddr};
 use std::env;
 use std::process::exit;
 use std::path::PathBuf;
@ -55,6 +55,7 @@ use ethminer::{Miner, MinerService};
 use docopt::Docopt;
 use daemonize::Daemonize;
 use number_prefix::{binary_prefix, Standalone, Prefixed};
+use util::keys::store::*;

 fn die_with_message(msg: &str) -> ! {
 	println!("ERROR: {}", msg);
@ -72,28 +73,26 @@ Parity. Ethereum Client.
  Copyright 2015, 2016 Ethcore (UK) Limited

 Usage:
-  parity daemon <pid-file> [options] [ --no-bootstrap | <enode>... ]
+  parity daemon <pid-file> [options]
  parity account (new | list)
-  parity [options] [ --no-bootstrap | <enode>... ]
+  parity [options]

 Protocol Options:
  --chain CHAIN            Specify the blockchain type. CHAIN may be either a JSON chain specification file
                           or olympic, frontier, homestead, mainnet, morden, or testnet [default: homestead].
-  --testnet                Equivalent to --chain testnet (geth-compatible).
-  --networkid INDEX        Override the network identifier from the chain we are on.
+  --db-path PATH           Specify the database & configuration directory path [default: $HOME/.parity]
  --pruning                Client should prune the state/storage trie.
-  -d --datadir PATH        Specify the database & configuration directory path [default: $HOME/.parity]
  --keys-path PATH         Specify the path for JSON key files to be found [default: $HOME/.web3/keys]
  --identity NAME          Specify your node's name.

 Networking Options:
-  --no-bootstrap           Don't bother trying to connect to any nodes initially.
-  --listen-address URL     Specify the IP/port on which to listen for peers [default: 0.0.0.0:30304].
-  --public-address URL     Specify the IP/port on which peers may connect.
-  --address URL            Equivalent to --listen-address URL --public-address URL.
+  --port PORT              Override the port on which the node should listen [default: 30303].
  --peers NUM              Try to maintain that many peers [default: 25].
+  --nat METHOD             Specify method to use for determining public address. Must be one of: any, none,
+                           upnp, extip:(IP) [default: any].
+  --bootnodes NODES        Specify additional comma-separated bootnodes.
+  --no-bootstrap           Don't bother trying to connect to standard bootnodes.
  --no-discovery           Disable new peer discovery.
-  --no-upnp                Disable trying to figure out the correct public adderss over UPnP.
  --node-key KEY           Specify node secret key, either as 64-character hex string or input to SHA3 operation.

 API and Console Options:
@ -103,17 +102,12 @@ API and Console Options:
  --jsonrpc-cors URL       Specify CORS header for JSON-RPC API responses [default: null].
  --jsonrpc-apis APIS      Specify the APIs available through the JSONRPC interface. APIS is a comma-delimited
                           list of API name. Possible name are web3, eth and net. [default: web3,eth,net].
-  --rpc                    Equivalent to --jsonrpc (geth-compatible).
-  --rpcaddr HOST           Equivalent to --jsonrpc-addr HOST (geth-compatible).
-  --rpcport PORT           Equivalent to --jsonrpc-port PORT (geth-compatible).
-  --rpcapi APIS            Equivalent to --jsonrpc-apis APIS (geth-compatible).
-  --rpccorsdomain URL      Equivalent to --jsonrpc-cors URL (geth-compatible).

 Sealing/Mining Options:
  --gasprice GAS           Minimal gas price a transaction must have to be accepted for mining [default: 20000000000].
  --author ADDRESS         Specify the block author (aka "coinbase") address for sending block rewards
                           from sealed blocks [default: 0037a6b811ffeb6e072da21179d11b1406371c63].
-  --extradata STRING       Specify a custom extra-data for authored blocks, no more than 32 characters.
+  --extra-data STRING      Specify a custom extra-data for authored blocks, no more than 32 characters.

 Memory Footprint Options:
  --cache-pref-size BYTES  Specify the prefered size of the blockchain cache in bytes [default: 16384].
@ -122,6 +116,21 @@ Memory Footprint Options:
  --cache MEGABYTES        Set total amount of cache to use for the entire system, mutually exclusive with
                           other cache options (geth-compatible).

+Geth-Compatibility Options
+  --datadir PATH           Equivalent to --db-path PATH.
+  --testnet                Equivalent to --chain testnet.
+  --networkid INDEX        Override the network identifier from the chain we are on.
+  --rpc                    Equivalent to --jsonrpc.
+  --rpcaddr HOST           Equivalent to --jsonrpc-addr HOST.
+  --rpcport PORT           Equivalent to --jsonrpc-port PORT.
+  --rpcapi APIS            Equivalent to --jsonrpc-apis APIS.
+  --rpccorsdomain URL      Equivalent to --jsonrpc-cors URL.
+  --maxpeers COUNT         Equivalent to --peers COUNT.
+  --nodekey KEY            Equivalent to --node-key KEY.
+  --nodiscover             Equivalent to --no-discovery.
+  --etherbase ADDRESS      Equivalent to --author ADDRESS.
+  --extradata STRING       Equivalent to --extra-data STRING.
+
 Miscellaneous Options:
  -l --logging LOGGING     Specify the logging level.
  -v --version             Show information about version.
@ -135,22 +144,18 @@ struct Args {
 	cmd_new: bool,
 	cmd_list: bool,
 	arg_pid_file: String,
-	arg_enode: Vec<String>,
 	flag_chain: String,
-	flag_testnet: bool,
-	flag_datadir: String,
-	flag_networkid: Option<String>,
+	flag_db_path: String,
 	flag_identity: String,
 	flag_cache: Option<usize>,
 	flag_keys_path: String,
+	flag_bootnodes: Option<String>,
 	flag_pruning: bool,
 	flag_no_bootstrap: bool,
-	flag_listen_address: String,
-	flag_public_address: Option<String>,
-	flag_address: Option<String>,
+	flag_port: u16,
 	flag_peers: usize,
 	flag_no_discovery: bool,
-	flag_no_upnp: bool,
+	flag_nat: String,
 	flag_node_key: Option<String>,
 	flag_cache_pref_size: usize,
 	flag_cache_max_size: usize,
@ -160,16 +165,24 @@ struct Args {
 	flag_jsonrpc_port: u16,
 	flag_jsonrpc_cors: String,
 	flag_jsonrpc_apis: String,
+	flag_logging: Option<String>,
+	flag_version: bool,
+	// geth-compatibility...
+	flag_nodekey: Option<String>,
+	flag_nodiscover: bool,
+	flag_maxpeers: Option<usize>,
+	flag_author: String,
+	flag_extra_data: Option<String>,
+	flag_datadir: Option<String>,
+	flag_extradata: Option<String>,
+	flag_etherbase: Option<String>,
 	flag_rpc: bool,
 	flag_rpcaddr: Option<String>,
 	flag_rpcport: Option<u16>,
 	flag_rpccorsdomain: Option<String>,
 	flag_rpcapi: Option<String>,
-	flag_logging: Option<String>,
-	flag_version: bool,
-	flag_gasprice: String,
-	flag_author: String,
-	flag_extra_data: Option<String>,
+	flag_testnet: bool,
+	flag_networkid: Option<String>,
 }

 fn setup_log(init: &Option<String>) {
@ -199,7 +212,9 @@ fn setup_log(init: &Option<String>) {
 }

 #[cfg(feature = "rpc")]
-fn setup_rpc_server(client: Arc<Client>, sync: Arc<EthSync>, miner: Arc<Miner>, url: &str, cors_domain: &str, apis: Vec<&str>) -> Option<Arc<PanicHandler>> {
+fn setup_rpc_server(
+	client: Arc<Client>, sync: Arc<EthSync>, secret_store: Arc<AccountService>, miner: Arc<Miner>,
+	url: &str, cors_domain: &str, apis: Vec<&str>) -> Option<Arc<PanicHandler>> {
 	use rpc::v1::*;

 	let server = rpc::RpcServer::new();
@ -208,7 +223,7 @@ fn setup_rpc_server(client: Arc<Client>, sync: Arc<EthSync>, miner: Arc<Miner>,
 			"web3" => server.add_delegate(Web3Client::new().to_delegate()),
 			"net" => server.add_delegate(NetClient::new(&sync).to_delegate()),
 			"eth" => {
-				server.add_delegate(EthClient::new(&client, &sync, &miner).to_delegate());
+				server.add_delegate(EthClient::new(&client, &sync, &secret_store, &miner).to_delegate());
 				server.add_delegate(EthFilterClient::new(&client).to_delegate());
 			}
 			_ => {
@ -220,7 +235,9 @@ fn setup_rpc_server(client: Arc<Client>, sync: Arc<EthSync>, miner: Arc<Miner>,
 }

 #[cfg(not(feature = "rpc"))]
-fn setup_rpc_server(_client: Arc<Client>, _sync: Arc<EthSync>, _url: &str) -> Option<Arc<PanicHandler>> {
+fn setup_rpc_server(
+	_client: Arc<Client>, _sync: Arc<EthSync>, _secret_store: Arc<AccountService>, _miner: Arc<Miner>,
+	_url: &str, _cors_domain: &str, _apis: Vec<&str>) -> Option<Arc<PanicHandler>> {
 	None
 }

@ -249,12 +266,14 @@ impl Configuration {
 	}

 	fn path(&self) -> String {
-		self.args.flag_datadir.replace("$HOME", env::home_dir().unwrap().to_str().unwrap())
+		let d = self.args.flag_datadir.as_ref().unwrap_or(&self.args.flag_db_path);
+		d.replace("$HOME", env::home_dir().unwrap().to_str().unwrap())
 	}

 	fn author(&self) -> Address {
-		Address::from_str(&self.args.flag_author).unwrap_or_else(|_| {
-			die!("{}: Invalid address for --author. Must be 40 hex characters, without the 0x at the beginning.", self.args.flag_author)
+		let d = self.args.flag_etherbase.as_ref().unwrap_or(&self.args.flag_author);
+		Address::from_str(d).unwrap_or_else(|_| {
+			die!("{}: Invalid address for --author. Must be 40 hex characters, without the 0x at the beginning.", d)
 		})
 	}

@ -265,7 +284,7 @@ impl Configuration {
 	}

 	fn extra_data(&self) -> Bytes {
-		match self.args.flag_extra_data {
+		match self.args.flag_extradata.as_ref().or(self.args.flag_extra_data.as_ref()) {
 			Some(ref x) if x.len() <= 32 => x.as_bytes().to_owned(),
 			None => version_data(),
 			Some(ref x) => { die!("{}: Extra data must be at most 32 characters.", x); }
@ -299,53 +318,40 @@ impl Configuration {
 	}

 	fn init_nodes(&self, spec: &Spec) -> Vec<String> {
-		if self.args.flag_no_bootstrap { Vec::new() } else {
-			match self.args.arg_enode.len() {
-				0 => spec.nodes().clone(),
-				_ => self.args.arg_enode.iter().map(|s| Self::normalize_enode(s).unwrap_or_else(|| {
+		let mut r = if self.args.flag_no_bootstrap { Vec::new() } else { spec.nodes().clone() };
+		if let Some(ref x) = self.args.flag_bootnodes {
+			r.extend(x.split(',').map(|s| {
+				Self::normalize_enode(s).unwrap_or_else(|| {
 					die!("{}: Invalid node address format given for a boot node.", s)
-				})).collect(),
-			}
+				})
+			}));
 		}
+		r
 	}

-	#[cfg_attr(all(nightly, feature="dev"), allow(useless_format))]
+	#[cfg_attr(feature="dev", allow(useless_format))]
 	fn net_addresses(&self) -> (Option<SocketAddr>, Option<SocketAddr>) {
-		let mut listen_address = None;
-		let mut public_address = None;
-
-		if let Some(ref a) = self.args.flag_address {
-			public_address = Some(SocketAddr::from_str(a.as_ref()).unwrap_or_else(|_| {
-				die!("{}: Invalid listen/public address given with --address", a)
-			}));
-			listen_address = public_address;
-		}
-		if listen_address.is_none() {
-			listen_address = Some(SocketAddr::from_str(self.args.flag_listen_address.as_ref()).unwrap_or_else(|_| {
-				die!("{}: Invalid listen/public address given with --listen-address", self.args.flag_listen_address)
-			}));
-		}
-		if let Some(ref a) = self.args.flag_public_address {
-			if public_address.is_some() {
-				die!("Conflicting flags provided: --address and --public-address");
-			}
-			public_address = Some(SocketAddr::from_str(a.as_ref()).unwrap_or_else(|_| {
-				die!("{}: Invalid listen/public address given with --public-address", a)
-			}));
-		}
+		let listen_address = Some(SocketAddr::new(IpAddr::from_str("0.0.0.0").unwrap(), self.args.flag_port));
+		let public_address = if self.args.flag_nat.starts_with("extip:") {
+			let host = &self.args.flag_nat[6..];
+			let host = IpAddr::from_str(host).unwrap_or_else(|_| die!("Invalid host given with `--nat extip:{}`", host));
+			Some(SocketAddr::new(host, self.args.flag_port))
+		} else {
+			listen_address.clone()
+		};
 		(listen_address, public_address)
 	}

 	fn net_settings(&self, spec: &Spec) -> NetworkConfiguration {
 		let mut ret = NetworkConfiguration::new();
-		ret.nat_enabled = !self.args.flag_no_upnp;
+		ret.nat_enabled = self.args.flag_nat == "any" || self.args.flag_nat == "upnp";
 		ret.boot_nodes = self.init_nodes(spec);
 		let (listen, public) = self.net_addresses();
 		ret.listen_address = listen;
 		ret.public_address = public;
 		ret.use_secret = self.args.flag_node_key.as_ref().map(|s| Secret::from_str(&s).unwrap_or_else(|_| s.sha3()));
-		ret.discovery_enabled = !self.args.flag_no_discovery;
-		ret.ideal_peers = self.args.flag_peers as u32;
+		ret.discovery_enabled = !self.args.flag_no_discovery && !self.args.flag_nodiscover;
+		ret.ideal_peers = self.args.flag_maxpeers.unwrap_or(self.args.flag_peers) as u32;
 		let mut net_path = PathBuf::from(&self.path());
 		net_path.push("network");
 		ret.config_path = Some(net_path.to_str().unwrap().to_owned());
@ -451,6 +457,9 @@ impl Configuration {
 		// Sync
 		let sync = EthSync::register(service.network(), sync_config, client.clone(), miner.clone());

+		// Secret Store
+		let account_service = Arc::new(AccountService::new());
+
 		// Setup rpc
 		if self.args.flag_jsonrpc || self.args.flag_rpc {
 			let url = format!("{}:{}",
@ -461,8 +470,13 @@ impl Configuration {
 			let cors = self.args.flag_rpccorsdomain.as_ref().unwrap_or(&self.args.flag_jsonrpc_cors);
 			// TODO: use this as the API list.
 			let apis = self.args.flag_rpcapi.as_ref().unwrap_or(&self.args.flag_jsonrpc_apis);
-			let server_handler = setup_rpc_server(service.client(), sync.clone(), miner.clone(), &url, cors, apis.split(',').collect());
-
+			let server_handler = setup_rpc_server(
+				service.client(),
+				sync.clone(),
+				account_service.clone(),
+				miner.clone(),
+				&url, cors, apis.split(',').collect()
+			);
 			if let Some(handler) = server_handler {
 				panic_handler.forward_from(handler.deref());
 			}
--- a/rpc/Cargo.toml
+++ b/rpc/Cargo.toml
@ -27,9 +27,8 @@ serde_macros = { version = "0.7.0", optional = true }
 [build-dependencies]
 serde_codegen = { version = "0.7.0", optional = true }
 syntex = "0.29.0"
-rustc_version = "0.1"

 [features]
 default = ["serde_codegen"]
 nightly = ["serde_macros"]
-dev = ["ethcore/dev", "ethcore-util/dev", "ethsync/dev", "ethminer/dev"]
+dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethsync/dev", "ethminer/dev"]
--- a/rpc/build.rs
+++ b/rpc/build.rs
@ -14,10 +14,6 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

-extern crate rustc_version;
-
-use rustc_version::{version_meta, Channel};
-
 #[cfg(not(feature = "serde_macros"))]
 mod inner {
    extern crate syntex;
@ -46,7 +42,4 @@ mod inner {

 fn main() {
    inner::main();
-	if let Channel::Nightly = version_meta().channel {
-		println!("cargo:rustc-cfg=nightly");
-	}
 }
--- a/rpc/src/v1/impls/eth.rs
+++ b/rpc/src/v1/impls/eth.rs
@ -30,23 +30,27 @@ use ethcore::views::*;
 use ethcore::ethereum::Ethash;
 use ethcore::ethereum::denominations::shannon;
 use v1::traits::{Eth, EthFilter};
-use v1::types::{Block, BlockTransactions, BlockNumber, Bytes, SyncStatus, SyncInfo, Transaction, OptionalValue, Index, Filter, Log};
+use v1::types::{Block, BlockTransactions, BlockNumber, Bytes, SyncStatus, SyncInfo, Transaction, TransactionRequest, OptionalValue, Index, Filter, Log};
 use v1::helpers::{PollFilter, PollManager};
+use util::keys::store::AccountProvider;

 /// Eth rpc implementation.
-pub struct EthClient<C, S, M>
+pub struct EthClient<C, S, A, M>
 	where C: BlockChainClient,
 		  S: SyncProvider,
+		  A: AccountProvider,
 		  M: MinerService {
 	client: Weak<C>,
 	sync: Weak<S>,
+	accounts: Weak<A>,
 	miner: Weak<M>,
 	hashrates: RwLock<HashMap<H256, u64>>,
 }

-impl<C, S, M> EthClient<C, S, M>
+impl<C, S, A, M> EthClient<C, S, A, M>
 	where C: BlockChainClient,
 		  S: SyncProvider,
+		  A: AccountProvider,
 		  M: MinerService {
 	/// Creates new EthClient.
 	pub fn new(client: &Arc<C>, sync: &Arc<S>, miner: &Arc<M>) -> Self {
@ -54,6 +58,7 @@ impl<C, S, M> EthClient<C, S, M>
 			client: Arc::downgrade(client),
 			sync: Arc::downgrade(sync),
 			miner: Arc::downgrade(miner),
+			accounts: Arc::downgrade(accounts),
 			hashrates: RwLock::new(HashMap::new()),
 		}
 	}
@ -104,10 +109,12 @@ impl<C, S, M> EthClient<C, S, M>
 	}
 }

-impl<C, S, M> Eth for EthClient<C, S, M>
+impl<C, S, A, M> Eth for EthClient<C, S, A, M>
 	where C: BlockChainClient + 'static,
 		  S: SyncProvider + 'static,
+		  A: AccountProvider + 'static,
 		  M: MinerService + 'static {
+
 	fn protocol_version(&self, params: Params) -> Result<Value, Error> {
 		match params {
 			Params::None => to_value(&U256::from(take_weak!(self.sync).status().protocol_version)),
@ -171,7 +178,7 @@ impl<C, S, M> Eth for EthClient<C, S, M>
 		}
 	}

-	fn block_transaction_count(&self, params: Params) -> Result<Value, Error> {
+	fn block_transaction_count_by_hash(&self, params: Params) -> Result<Value, Error> {
 		from_params::<(H256,)>(params)
 			.and_then(|(hash,)| match take_weak!(self.client).block(BlockId::Hash(hash)) {
 				Some(bytes) => to_value(&BlockView::new(&bytes).transactions_count()),
@ -179,6 +186,17 @@ impl<C, S, M> Eth for EthClient<C, S, M>
 			})
 	}

+	fn block_transaction_count_by_number(&self, params: Params) -> Result<Value, Error> {
+		from_params::<(BlockNumber,)>(params)
+			.and_then(|(block_number,)| match block_number {
+				BlockNumber::Pending => to_value(&take_weak!(self.sync).status().transaction_queue_pending),
+				_ => match take_weak!(self.client).block(block_number.into()) {
+					Some(bytes) => to_value(&BlockView::new(&bytes).transactions_count()),
+					None => Ok(Value::Null)
+				}
+			})
+	}
+
 	fn block_uncles_count(&self, params: Params) -> Result<Value, Error> {
 		from_params::<(H256,)>(params)
 			.and_then(|(hash,)| match take_weak!(self.client).block(BlockId::Hash(hash)) {
@ -267,6 +285,24 @@ impl<C, S, M> Eth for EthClient<C, S, M>
 			to_value(&true)
 		})
 	}
+
+	fn send_transaction(&self, params: Params) -> Result<Value, Error> {
+		from_params::<(TransactionRequest, )>(params)
+			.and_then(|(transaction_request, )| {
+				let accounts = take_weak!(self.accounts);
+				match accounts.account_secret(&transaction_request.from) {
+					Ok(secret) => {
+						let sync = take_weak!(self.sync);
+						let (transaction, _) = transaction_request.to_eth();
+						let signed_transaction = transaction.sign(&secret);
+						let hash = signed_transaction.hash();
+						sync.insert_transaction(signed_transaction);
+						to_value(&hash)
+					},
+					Err(_) => { to_value(&U256::zero()) }
+				}
+		})
+	}
 }

 /// Eth filter rpc implementation.
--- a/rpc/src/v1/impls/net.rs
+++ b/rpc/src/v1/impls/net.rs
@ -36,10 +36,15 @@ impl<S> NetClient<S> where S: SyncProvider {

 impl<S> Net for NetClient<S> where S: SyncProvider + 'static {
 	fn version(&self, _: Params) -> Result<Value, Error> {
-		Ok(Value::U64(take_weak!(self.sync).status().protocol_version as u64))
+		Ok(Value::String(format!("{}", take_weak!(self.sync).status().protocol_version).to_owned()))
 	}

 	fn peer_count(&self, _params: Params) -> Result<Value, Error> {
-		Ok(Value::U64(take_weak!(self.sync).status().num_peers as u64))
+		Ok(Value::String(format!("0x{:x}", take_weak!(self.sync).status().num_peers as u64).to_owned()))
+	}
+
+	fn is_listening(&self, _: Params) -> Result<Value, Error> {
+		// right now (11 march 2016), we are always listening for incoming connections
+		Ok(Value::Bool(true))
 	}
 }
--- a/rpc/src/v1/impls/personal.rs
+++ b/rpc/src/v1/impls/personal.rs
@ -20,30 +20,28 @@ use jsonrpc_core::*;
 use v1::traits::Personal;
 use util::keys::store::*;
 use util::Address;
-use std::sync::RwLock;

 /// Account management (personal) rpc implementation.
 pub struct PersonalClient {
-	secret_store: Weak<RwLock<SecretStore>>,
+	accounts: Weak<AccountProvider>,
 }

 impl PersonalClient {
 	/// Creates new PersonalClient
-	pub fn new(store: &Arc<RwLock<SecretStore>>) -> Self {
+	pub fn new(store: &Arc<AccountProvider>) -> Self {
 		PersonalClient {
-			secret_store: Arc::downgrade(store),
+			accounts: Arc::downgrade(store),
 		}
 	}
 }

 impl Personal for PersonalClient {
 	fn accounts(&self, _: Params) -> Result<Value, Error> {
-		let store_wk = take_weak!(self.secret_store);
-		let store = store_wk.read().unwrap();
+		let store = take_weak!(self.accounts);
 		match store.accounts() {
 			Ok(account_list) => {
 				Ok(Value::Array(account_list.iter()
-					.map(|&(account, _)| Value::String(format!("{:?}", account)))
+					.map(|&account| Value::String(format!("{:?}", account)))
 					.collect::<Vec<Value>>())
 				)
 			}
@ -54,8 +52,7 @@ impl Personal for PersonalClient {
 	fn new_account(&self, params: Params) -> Result<Value, Error> {
 		from_params::<(String, )>(params).and_then(
 			|(pass, )| {
-				let store_wk = take_weak!(self.secret_store);
-				let mut store = store_wk.write().unwrap();
+				let store = take_weak!(self.accounts);
 				match store.new_account(&pass) {
 					Ok(address) => Ok(Value::String(format!("{:?}", address))),
 					Err(_) => Err(Error::internal_error())
@ -67,8 +64,7 @@ impl Personal for PersonalClient {
 	fn unlock_account(&self, params: Params) -> Result<Value, Error> {
 		from_params::<(Address, String, u64)>(params).and_then(
 			|(account, account_pass, _)|{
-				let store_wk = take_weak!(self.secret_store);
-				let store = store_wk.read().unwrap();
+				let store = take_weak!(self.accounts);
 				match store.unlock_account(&account, &account_pass) {
 					Ok(_) => Ok(Value::Bool(true)),
 					Err(_) => Ok(Value::Bool(false)),
--- a/rpc/src/v1/mod.rs
+++ b/rpc/src/v1/mod.rs
@ -21,9 +21,10 @@
 pub mod traits;
 mod impls;
 mod types;
+mod helpers;
+
 #[cfg(test)]
 mod tests;
-mod helpers;

 pub use self::traits::{Web3, Eth, EthFilter, Personal, Net};
 pub use self::impls::*;
--- a/rpc/src/v1/tests/helpers/mod.rs
+++ b/rpc/src/v1/tests/helpers/mod.rs
@ -14,12 +14,6 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

-extern crate rustc_version;
+mod sync_provider;

-use rustc_version::{version_meta, Channel};
-
-fn main() {
-	if let Channel::Nightly = version_meta().channel {
-		println!("cargo:rustc-cfg=nightly");
-	}
-}
+pub use self::sync_provider::{Config, TestSyncProvider};
--- a/rpc/src/v1/tests/helpers/sync_provider.rs
+++ b/rpc/src/v1/tests/helpers/sync_provider.rs
@ -0,0 +1,58 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+use ethcore::transaction::SignedTransaction;
+use ethsync::{SyncProvider, SyncStatus, SyncState};
+
+pub struct Config {
+	pub protocol_version: u8,
+	pub num_peers: usize,
+}
+
+pub struct TestSyncProvider {
+	status: SyncStatus,
+}
+
+impl TestSyncProvider {
+	pub fn new(config: Config) -> Self {
+		TestSyncProvider {
+			status: SyncStatus {
+				state: SyncState::NotSynced,
+				protocol_version: config.protocol_version,
+				start_block_number: 0,
+				last_imported_block_number: None,
+				highest_block_number: None,
+				blocks_total: 0,
+				blocks_received: 0,
+				num_peers: config.num_peers,
+				num_active_peers: 0,
+				mem_used: 0,
+				transaction_queue_pending: 0,
+			},
+		}
+	}
+}
+
+impl SyncProvider for TestSyncProvider {
+	fn status(&self) -> SyncStatus {
+		self.status.clone()
+	}
+
+	fn insert_transaction(&self, _transaction: SignedTransaction) {
+		unimplemented!()
+	}
+}
+
--- a/rpc/src/v1/tests/mod.rs
+++ b/rpc/src/v1/tests/mod.rs
@ -1 +1,20 @@
-//TODO: load custom blockchain state and test
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//!TODO: load custom blockchain state and test
+
+mod net;
+mod helpers;
--- a/rpc/src/v1/tests/net.rs
+++ b/rpc/src/v1/tests/net.rs
@ -0,0 +1,66 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+use std::sync::Arc;
+use jsonrpc_core::IoHandler;
+use v1::{Net, NetClient};
+use v1::tests::helpers::{Config, TestSyncProvider};
+
+fn sync_provider() -> Arc<TestSyncProvider> {
+	Arc::new(TestSyncProvider::new(Config {
+		protocol_version: 65,
+		num_peers: 120,
+	}))
+}
+
+#[test]
+fn rpc_net_version() {
+	let sync = sync_provider();
+	let net = NetClient::new(&sync).to_delegate();
+	let io = IoHandler::new();
+	io.add_delegate(net);
+
+	let request = r#"{"jsonrpc": "2.0", "method": "net_version", "params": [], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":"65","id":1}"#;
+
+	assert_eq!(io.handle_request(request), Some(response.to_string()));
+}
+
+#[test]
+fn rpc_net_peer_count() {
+	let sync = sync_provider();
+	let net = NetClient::new(&sync).to_delegate();
+	let io = IoHandler::new();
+	io.add_delegate(net);
+
+	let request = r#"{"jsonrpc": "2.0", "method": "net_peerCount", "params": [], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":"0x78","id":1}"#;
+
+	assert_eq!(io.handle_request(request), Some(response.to_string()));
+}
+
+#[test]
+fn rpc_net_listening() {
+	let sync = sync_provider();
+	let net = NetClient::new(&sync).to_delegate();
+	let io = IoHandler::new();
+	io.add_delegate(net);
+
+	let request = r#"{"jsonrpc": "2.0", "method": "net_listening", "params": [], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
+
+	assert_eq!(io.handle_request(request), Some(response.to_string()));
+}
--- a/rpc/src/v1/traits/eth.rs
+++ b/rpc/src/v1/traits/eth.rs
@ -55,12 +55,15 @@ pub trait Eth: Sized + Send + Sync + 'static {

 	/// Returns block with given number.
 	fn block_by_number(&self, _: Params) -> Result<Value, Error> { rpc_unimplemented!() }
-	
+
 	/// Returns the number of transactions sent from given address at given time (block number).
 	fn transaction_count(&self, _: Params) -> Result<Value, Error> { rpc_unimplemented!() }

-	/// Returns the number of transactions in a block.
-	fn block_transaction_count(&self, _: Params) -> Result<Value, Error> { rpc_unimplemented!() }
+	/// Returns the number of transactions in a block given block hash.
+	fn block_transaction_count_by_hash(&self, _: Params) -> Result<Value, Error> { rpc_unimplemented!() }
+
+	/// Returns the number of transactions in a block given block number.
+	fn block_transaction_count_by_number(&self, _: Params) -> Result<Value, Error> { rpc_unimplemented!() }

 	/// Returns the number of uncles in a given block.
 	fn block_uncles_count(&self, _: Params) -> Result<Value, Error> { rpc_unimplemented!() }
@ -130,8 +133,8 @@ pub trait Eth: Sized + Send + Sync + 'static {
 		delegate.add_method("eth_balance", Eth::balance);
 		delegate.add_method("eth_getStorageAt", Eth::storage_at);
 		delegate.add_method("eth_getTransactionCount", Eth::transaction_count);
-		delegate.add_method("eth_getBlockTransactionCountByHash", Eth::block_transaction_count);
-		delegate.add_method("eth_getBlockTransactionCountByNumber", Eth::block_transaction_count);
+		delegate.add_method("eth_getBlockTransactionCountByHash", Eth::block_transaction_count_by_hash);
+		delegate.add_method("eth_getBlockTransactionCountByNumber", Eth::block_transaction_count_by_number);
 		delegate.add_method("eth_getUncleCountByBlockHash", Eth::block_uncles_count);
 		delegate.add_method("eth_getUncleCountByBlockNumber", Eth::block_uncles_count);
 		delegate.add_method("eth_code", Eth::code_at);
--- a/rpc/src/v1/types/bytes.rs
+++ b/rpc/src/v1/types/bytes.rs
@ -15,7 +15,9 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 use rustc_serialize::hex::ToHex;
-use serde::{Serialize, Serializer};
+use serde::{Serialize, Serializer, Deserialize, Deserializer, Error};
+use serde::de::Visitor;
+use util::common::FromHex;

 /// Wrapper structure around vector of bytes.
 #[derive(Debug)]
@ -26,6 +28,7 @@ impl Bytes {
 	pub fn new(bytes: Vec<u8>) -> Bytes {
 		Bytes(bytes)
 	}
+	pub fn to_vec(self) -> Vec<u8> { let Bytes(x) = self; x }
 }

 impl Default for Bytes {
@ -36,7 +39,7 @@ impl Default for Bytes {
 }

 impl Serialize for Bytes {
-	fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error> 
+	fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
 	where S: Serializer {
 		let mut serialized = "0x".to_owned();
 		serialized.push_str(self.0.to_hex().as_ref());
@ -44,6 +47,32 @@ impl Serialize for Bytes {
 	}
 }

+impl Deserialize for Bytes {
+	fn deserialize<D>(deserializer: &mut D) -> Result<Bytes, D::Error>
+	where D: Deserializer {
+		deserializer.deserialize(BytesVisitor)
+	}
+}
+
+struct BytesVisitor;
+
+impl Visitor for BytesVisitor {
+	type Value = Bytes;
+
+	fn visit_str<E>(&mut self, value: &str) -> Result<Self::Value, E> where E: Error {
+		if value.len() >= 2 && &value[0..2] == "0x" {
+			Ok(Bytes::new(FromHex::from_hex(&value[2..]).unwrap_or_else(|_| vec![])))
+		} else {
+			Err(Error::custom("invalid hex"))
+		}
+	}
+
+	fn visit_string<E>(&mut self, value: String) -> Result<Self::Value, E> where E: Error {
+		self.visit_str(value.as_ref())
+	}
+}
+
+
 #[cfg(test)]
 mod tests {
 	use super::*;
--- a/rpc/src/v1/types/mod.rs.in
+++ b/rpc/src/v1/types/mod.rs.in
@ -33,3 +33,5 @@ pub use self::log::Log;
 pub use self::optionals::OptionalValue;
 pub use self::sync::{SyncStatus, SyncInfo};
 pub use self::transaction::Transaction;
+pub use self::transaction::TransactionRequest;
+
--- a/rpc/src/v1/types/transaction.rs
+++ b/rpc/src/v1/types/transaction.rs
@ -17,6 +17,8 @@
 use util::numbers::*;
 use ethcore::transaction::{LocalizedTransaction, Action};
 use v1::types::{Bytes, OptionalValue};
+use serde::{Deserializer, Error};
+use ethcore;

 #[derive(Debug, Default, Serialize)]
 pub struct Transaction {
@ -37,6 +39,35 @@ pub struct Transaction {
 	pub input: Bytes
 }

+#[derive(Debug, Default, Serialize, Deserialize)]
+pub struct TransactionRequest {
+	pub from: Address,
+	pub to: Option<Address>,
+	#[serde(rename="gasPrice")]
+	pub gas_price: Option<U256>,
+	pub gas: Option<U256>,
+	pub value: Option<U256>,
+	pub data: Bytes,
+	pub nonce: Option<U256>,
+}
+
+impl TransactionRequest {
+	/// maps transaction request to the transaction that can be signed and inserted
+	pub fn to_eth(self) -> (ethcore::transaction::Transaction, Address) {
+		(ethcore::transaction::Transaction {
+			nonce: self.nonce.unwrap_or(U256::zero()),
+			action: match self.to {
+				None => ethcore::transaction::Action::Create,
+				Some(addr) => ethcore::transaction::Action::Call(addr)
+			},
+			gas: self.gas.unwrap_or(U256::zero()),
+			gas_price: self.gas_price.unwrap_or(U256::zero()),
+			value: self.value.unwrap_or(U256::zero()),
+			data: self.data.to_vec()
+		}, self.from)
+	}
+}
+
 impl From<LocalizedTransaction> for Transaction {
 	fn from(t: LocalizedTransaction) -> Transaction {
 		Transaction {
--- a/sync/Cargo.toml
+++ b/sync/Cargo.toml
@ -4,13 +4,9 @@ name = "ethsync"
 version = "0.9.99"
 license = "GPL-3.0"
 authors = ["Ethcore <admin@ethcore.io"]
-build = "build.rs"

 [lib]

-[build-dependencies]
-rustc_version = "0.1"
-
 [dependencies]
 ethcore-util = { path = "../util" }
 ethcore = { path = "../ethcore" }
@ -24,4 +20,4 @@ clippy = { version = "0.0.44", optional = true }

 [features]
 default = []
-dev = ["ethcore/dev", "ethcore-util/dev", "ethminer/dev"]
+dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethminer/dev"]
--- a/sync/src/chain.rs
+++ b/sync/src/chain.rs
@ -118,6 +118,7 @@ pub enum SyncState {
 }

 /// Syncing status and statistics
+#[derive(Clone)]
 pub struct SyncStatus {
 	/// State
 	pub state: SyncState,
@ -273,7 +274,7 @@ impl ChainSync {
 	}


-	#[cfg_attr(all(nightly, feature="dev"), allow(for_kv_map))] // Because it's not possible to get `values_mut()`
+	#[cfg_attr(feature="dev", allow(for_kv_map))] // Because it's not possible to get `values_mut()`
 	/// Rest sync. Clear all downloaded data but keep the queue
 	fn reset(&mut self) {
 		self.downloading_headers.clear();
@ -340,7 +341,7 @@ impl ChainSync {
 		Ok(())
 	}

-	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
+	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
 	/// Called by peer once it has new block headers during sync
 	fn on_peer_block_headers(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
 		self.reset_peer_asking(peer_id, PeerAsking::BlockHeaders);
@ -467,7 +468,7 @@ impl ChainSync {
 	}

 	/// Called by peer once it has new block bodies
-	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
+	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
 	fn on_peer_new_block(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
 		let block_rlp = try!(r.at(0));
 		let header_rlp = try!(block_rlp.at(0));
--- a/sync/src/lib.rs
+++ b/sync/src/lib.rs
@ -15,11 +15,11 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 #![warn(missing_docs)]
-#![cfg_attr(all(nightly, feature="dev"), feature(plugin))]
-#![cfg_attr(all(nightly, feature="dev"), plugin(clippy))]
+#![cfg_attr(feature="dev", feature(plugin))]
+#![cfg_attr(feature="dev", plugin(clippy))]

 // Keeps consistency (all lines with `.clone()`) and helpful when changing ref to non-ref.
-#![cfg_attr(all(nightly, feature="dev"), allow(clone_on_copy))]
+#![cfg_attr(feature="dev", allow(clone_on_copy))]

 //! Blockchain sync module
 //! Implements ethereum protocol version 63 as specified here:
--- a/sync/src/range_collection.rs
+++ b/sync/src/range_collection.rs
@ -42,7 +42,7 @@ pub trait RangeCollection<K, V> {
 	fn remove_head(&mut self, start: &K);
 	/// Remove all elements >= `start` in the range that contains `start`
 	fn remove_tail(&mut self, start: &K);
-	/// Remove all elements >= `start` 
+	/// Remove all elements >= `start`
 	fn remove_from(&mut self, start: &K);
 	/// Remove all elements >= `tail`
 	fn insert_item(&mut self, key: K, value: V);
@ -231,7 +231,7 @@ impl<K, V> RangeCollection<K, V> for Vec<(K, Vec<V>)> where K: Ord + PartialEq +
 }

 #[test]
-#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
+#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
 fn test_range() {
 	use std::cmp::{Ordering};

--- a/sync/src/tests/chain.rs
+++ b/sync/src/tests/chain.rs
@ -15,7 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 use util::*;
-use ethcore::client::{BlockChainClient, BlockId};
+use ethcore::client::{BlockChainClient, BlockId, EachBlockWith};
 use io::SyncIo;
 use chain::{SyncState};
 use super::helpers::*;
--- a/sync/src/tests/helpers.rs
+++ b/sync/src/tests/helpers.rs
@ -15,310 +15,11 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 use util::*;
-use ::SyncConfig;
-use ethcore::client::{BlockChainClient, BlockStatus, TreeRoute, BlockChainInfo, TransactionId, BlockId, BlockQueueInfo};
-use ethcore::header::{Header as BlockHeader, BlockNumber};
-use ethcore::error::*;
-use ethcore::receipt::Receipt;
-use ethcore::transaction::{LocalizedTransaction, SignedTransaction, Transaction, Action};
-use ethcore::filter::Filter;
-use ethcore::log_entry::LocalizedLogEntry;
-use ethcore::block::{ClosedBlock, SealedBlock};
-use ethminer::Miner;
+use ethcore::client::{TestBlockChainClient, BlockChainClient};
 use io::SyncIo;
 use chain::ChainSync;
-
-pub struct TestBlockChainClient {
-	pub blocks: RwLock<HashMap<H256, Bytes>>,
- 	pub numbers: RwLock<HashMap<usize, H256>>,
-	pub genesis_hash: H256,
-	pub last_hash: RwLock<H256>,
-	pub difficulty: RwLock<U256>,
-}
-
-#[derive(Clone)]
-pub enum EachBlockWith {
-	Nothing,
-	Uncle,
-	Transaction,
-	UncleAndTransaction
-}
-
-impl TestBlockChainClient {
-	pub fn new() -> TestBlockChainClient {
-
-		let mut client = TestBlockChainClient {
-			blocks: RwLock::new(HashMap::new()),
-			numbers: RwLock::new(HashMap::new()),
-			genesis_hash: H256::new(),
-			last_hash: RwLock::new(H256::new()),
-			difficulty: RwLock::new(From::from(0)),
-		};
-		client.add_blocks(1, EachBlockWith::Nothing); // add genesis block
-		client.genesis_hash = client.last_hash.read().unwrap().clone();
-		client
-	}
-
-	pub fn add_blocks(&mut self, count: usize, with: EachBlockWith) {
-		let len = self.numbers.read().unwrap().len();
-		for n in len..(len + count) {
-			let mut header = BlockHeader::new();
-			header.difficulty = From::from(n);
-			header.parent_hash = self.last_hash.read().unwrap().clone();
-			header.number = n as BlockNumber;
-			let uncles = match with {
-				EachBlockWith::Uncle | EachBlockWith::UncleAndTransaction => {
-					let mut uncles = RlpStream::new_list(1);
-					let mut uncle_header = BlockHeader::new();
-					uncle_header.difficulty = From::from(n);
-					uncle_header.parent_hash = self.last_hash.read().unwrap().clone();
-					uncle_header.number = n as BlockNumber;
-					uncles.append(&uncle_header);
-					header.uncles_hash = uncles.as_raw().sha3();
-					uncles
-				},
-				_ => RlpStream::new_list(0)
-			};
-			let txs = match with {
-				EachBlockWith::Transaction | EachBlockWith::UncleAndTransaction => {
-					let mut txs = RlpStream::new_list(1);
-					let keypair = KeyPair::create().unwrap();
-					let tx = Transaction {
-						action: Action::Create,
-						value: U256::from(100),
-						data: "3331600055".from_hex().unwrap(),
-						gas: U256::from(100_000),
-						gas_price: U256::one(),
-						nonce: U256::zero()
-					};
-					let signed_tx = tx.sign(&keypair.secret());
-					txs.append(&signed_tx);
-					txs.out()
-				},
-				_ => rlp::NULL_RLP.to_vec()
-			};
-
-			let mut rlp = RlpStream::new_list(3);
-			rlp.append(&header);
-			rlp.append_raw(&txs, 1);
-			rlp.append_raw(uncles.as_raw(), 1);
-			self.import_block(rlp.as_raw().to_vec()).unwrap();
-		}
-	}
-
-	pub fn corrupt_block(&mut self, n: BlockNumber) {
-		let hash = self.block_hash(BlockId::Number(n)).unwrap();
-		let mut header: BlockHeader = decode(&self.block_header(BlockId::Number(n)).unwrap());
-		header.parent_hash = H256::new();
-		let mut rlp = RlpStream::new_list(3);
-		rlp.append(&header);
-		rlp.append_raw(&rlp::NULL_RLP, 1);
-		rlp.append_raw(&rlp::NULL_RLP, 1);
-		self.blocks.write().unwrap().insert(hash, rlp.out());
-	}
-
-	pub fn block_hash_delta_minus(&mut self, delta: usize) -> H256 {
-		let blocks_read = self.numbers.read().unwrap();
-		let index = blocks_read.len() - delta;
-		blocks_read[&index].clone()
-	}
-
-	fn block_hash(&self, id: BlockId) -> Option<H256> {
-		match id {
-			BlockId::Hash(hash) => Some(hash),
-			BlockId::Number(n) => self.numbers.read().unwrap().get(&(n as usize)).cloned(),
-			BlockId::Earliest => self.numbers.read().unwrap().get(&0).cloned(),
-			BlockId::Latest => self.numbers.read().unwrap().get(&(self.numbers.read().unwrap().len() - 1)).cloned()
-		}
-	}
-}
-
-impl BlockChainClient for TestBlockChainClient {
-	fn block_total_difficulty(&self, _id: BlockId) -> Option<U256> {
-		Some(U256::zero())
-	}
-
-	fn block_hash(&self, _id: BlockId) -> Option<H256> {
-		unimplemented!();
-	}
-
-	fn nonce(&self, _address: &Address) -> U256 {
-		U256::zero()
-	}
-
-	fn code(&self, _address: &Address) -> Option<Bytes> {
-		unimplemented!();
-	}
-
-	fn transaction(&self, _id: TransactionId) -> Option<LocalizedTransaction> {
-		unimplemented!();
-	}
-
-	fn blocks_with_bloom(&self, _bloom: &H2048, _from_block: BlockId, _to_block: BlockId) -> Option<Vec<BlockNumber>> {
-		unimplemented!();
-	}
-
-	fn logs(&self, _filter: Filter) -> Vec<LocalizedLogEntry> {
-		unimplemented!();
-	}
-
-	fn block_header(&self, id: BlockId) -> Option<Bytes> {
-		self.block_hash(id).and_then(|hash| self.blocks.read().unwrap().get(&hash).map(|r| Rlp::new(r).at(0).as_raw().to_vec()))
-	}
-
-	fn block_body(&self, id: BlockId) -> Option<Bytes> {
-		self.block_hash(id).and_then(|hash| self.blocks.read().unwrap().get(&hash).map(|r| {
-			let mut stream = RlpStream::new_list(2);
-			stream.append_raw(Rlp::new(&r).at(1).as_raw(), 1);
-			stream.append_raw(Rlp::new(&r).at(2).as_raw(), 1);
-			stream.out()
-		}))
-	}
-
-	fn block(&self, id: BlockId) -> Option<Bytes> {
-		self.block_hash(id).and_then(|hash| self.blocks.read().unwrap().get(&hash).cloned())
-	}
-
-	fn block_status(&self, id: BlockId) -> BlockStatus {
-		match id {
-			BlockId::Number(number) if (number as usize) < self.blocks.read().unwrap().len() => BlockStatus::InChain,
-			BlockId::Hash(ref hash) if self.blocks.read().unwrap().get(hash).is_some() => BlockStatus::InChain,
-			_ => BlockStatus::Unknown
-		}
-	}
-
-	// works only if blocks are one after another 1 -> 2 -> 3
-	fn tree_route(&self, from: &H256, to: &H256) -> Option<TreeRoute> {
-		Some(TreeRoute {
-			ancestor: H256::new(),
-			index: 0,
-			blocks: {
-				let numbers_read = self.numbers.read().unwrap();
-				let mut adding = false;
-
-				let mut blocks = Vec::new();
-				for (_, hash) in numbers_read.iter().sort_by(|tuple1, tuple2| tuple1.0.cmp(tuple2.0)) {
-					if hash == to {
-						if adding {
-							blocks.push(hash.clone());
-						}
-						adding = false;
-						break;
-					}
-					if hash == from {
-						adding = true;
-					}
-					if adding {
-						blocks.push(hash.clone());
-					}
-				}
-				if adding { Vec::new() } else { blocks }
-			}
-		})
-	}
-
-	// TODO: returns just hashes instead of node state rlp(?)
-	fn state_data(&self, hash: &H256) -> Option<Bytes> {
-		// starts with 'f' ?
-		if *hash > H256::from("f000000000000000000000000000000000000000000000000000000000000000") {
-			let mut rlp = RlpStream::new();
-			rlp.append(&hash.clone());
-			return Some(rlp.out());
-		}
-		None
-	}
-
-	fn block_receipts(&self, hash: &H256) -> Option<Bytes> {
-		// starts with 'f' ?
-		if *hash > H256::from("f000000000000000000000000000000000000000000000000000000000000000") {
-			let receipt = Receipt::new(
-				H256::zero(),
-				U256::zero(),
-				vec![]);
-			let mut rlp = RlpStream::new();
-			rlp.append(&receipt);
-			return Some(rlp.out());
-		}
-		None
-	}
-
-	fn import_block(&self, b: Bytes) -> ImportResult {
-		let header = Rlp::new(&b).val_at::<BlockHeader>(0);
-		let h = header.hash();
-		let number: usize = header.number as usize;
-		if number > self.blocks.read().unwrap().len() {
-			panic!("Unexpected block number. Expected {}, got {}", self.blocks.read().unwrap().len(), number);
-		}
-		if number > 0 {
-			match self.blocks.read().unwrap().get(&header.parent_hash) {
-				Some(parent) => {
-					let parent = Rlp::new(parent).val_at::<BlockHeader>(0);
-					if parent.number != (header.number - 1) {
-						panic!("Unexpected block parent");
-					}
-				},
-				None => {
-					panic!("Unknown block parent {:?} for block {}", header.parent_hash, number);
-				}
-			}
-		}
-		let len = self.numbers.read().unwrap().len();
-		if number == len {
-			{
-				let mut difficulty = self.difficulty.write().unwrap();
-				*difficulty.deref_mut() = *difficulty.deref() + header.difficulty;
-			}
-			mem::replace(self.last_hash.write().unwrap().deref_mut(), h.clone());
-			self.blocks.write().unwrap().insert(h.clone(), b);
-			self.numbers.write().unwrap().insert(number, h.clone());
-			let mut parent_hash = header.parent_hash;
-			if number > 0 {
-				let mut n = number - 1;
-				while n > 0 && self.numbers.read().unwrap()[&n] != parent_hash {
-					*self.numbers.write().unwrap().get_mut(&n).unwrap() = parent_hash.clone();
-					n -= 1;
-					parent_hash = Rlp::new(&self.blocks.read().unwrap()[&parent_hash]).val_at::<BlockHeader>(0).parent_hash;
-				}
-			}
-		}
-		else {
-			self.blocks.write().unwrap().insert(h.clone(), b.to_vec());
-		}
-		Ok(h)
-	}
-
-	fn queue_info(&self) -> BlockQueueInfo {
-		BlockQueueInfo {
-			verified_queue_size: 0,
-			unverified_queue_size: 0,
-			verifying_queue_size: 0,
-			max_queue_size: 0,
-			max_mem_use: 0,
-			mem_used: 0,
-		}
-	}
-
-	fn clear_queue(&self) {
-	}
-
-	fn chain_info(&self) -> BlockChainInfo {
-		BlockChainInfo {
-			total_difficulty: *self.difficulty.read().unwrap(),
-			pending_total_difficulty: *self.difficulty.read().unwrap(),
-			genesis_hash: self.genesis_hash.clone(),
-			best_block_hash: self.last_hash.read().unwrap().clone(),
-			best_block_number: self.blocks.read().unwrap().len() as BlockNumber - 1,
-		}
-	}
-
-	fn prepare_sealing(&self, _author: Address, _extra_data: Bytes, _transactions: Vec<SignedTransaction>) -> Option<ClosedBlock> {
-		unimplemented!()
-	}
-
-	fn try_seal(&self, _block: ClosedBlock, _seal: Vec<Bytes>) -> Result<SealedBlock, ClosedBlock> {
-		unimplemented!()
-	}
-}
+use ethminer::Miner;
+use ::SyncConfig;

 pub struct TestIo<'p> {
 	pub chain: &'p mut TestBlockChainClient,
--- a/util/Cargo.toml
+++ b/util/Cargo.toml
@ -40,8 +40,7 @@ chrono = "0.2"

 [features]
 default = []
-dev = []
+dev = ["clippy"]

 [build-dependencies]
 vergen = "*"
-rustc_version = "0.1"
--- a/util/bigint/src/uint.rs
+++ b/util/bigint/src/uint.rs
@ -1103,7 +1103,7 @@ macro_rules! construct_uint {
 			}
 		}

-		#[cfg_attr(all(nightly, feature="dev"), allow(derive_hash_xor_eq))] // We are pretty sure it's ok.
+		#[cfg_attr(feature="dev", allow(derive_hash_xor_eq))] // We are pretty sure it's ok.
 		impl Hash for $name {
 			fn hash<H>(&self, state: &mut H) where H: Hasher {
 				unsafe { state.write(::std::slice::from_raw_parts(self.0.as_ptr() as *mut u8, self.0.len() * 8)); }
@ -1485,7 +1485,7 @@ mod tests {
 	}

 	#[test]
-	#[cfg_attr(all(nightly, feature="dev"), allow(eq_op))]
+	#[cfg_attr(feature="dev", allow(eq_op))]
 	pub fn uint256_comp_test() {
 		let small = U256([10u64, 0, 0, 0]);
 		let big = U256([0x8C8C3EE70C644118u64, 0x0209E7378231E632, 0, 0]);
@ -2032,7 +2032,7 @@ mod tests {


 	#[test]
-	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
+	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
 	fn u256_multi_full_mul() {
 		let result = U256([0, 0, 0, 0]).full_mul(U256([0, 0, 0, 0]));
 		assert_eq!(U512([0, 0, 0, 0, 0, 0, 0, 0]), result);
--- a/util/build.rs
+++ b/util/build.rs
@ -14,15 +14,10 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

-extern crate rustc_version;
 extern crate vergen;

 use vergen::*;
-use rustc_version::{version_meta, Channel};

 fn main() {
 	vergen(OutputFns::all()).unwrap();
-	if let Channel::Nightly = version_meta().channel {
-		println!("cargo:rustc-cfg=nightly");
-	}
 }
--- a/util/src/hash.rs
+++ b/util/src/hash.rs
@ -305,7 +305,7 @@ macro_rules! impl_hash {
 		}

 		impl Copy for $from {}
-		#[cfg_attr(all(nightly, feature="dev"), allow(expl_impl_clone_on_copy))]
+		#[cfg_attr(feature="dev", allow(expl_impl_clone_on_copy))]
 		impl Clone for $from {
 			fn clone(&self) -> $from {
 				unsafe {
@ -637,7 +637,7 @@ mod tests {
 	use std::str::FromStr;

 	#[test]
-	#[cfg_attr(all(nightly, feature="dev"), allow(eq_op))]
+	#[cfg_attr(feature="dev", allow(eq_op))]
 	fn hash() {
 		let h = H64([0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]);
 		assert_eq!(H64::from_str("0123456789abcdef").unwrap(), h);
--- a/util/src/keys/store.rs
+++ b/util/src/keys/store.rs
@ -78,6 +78,59 @@ struct AccountUnlock {
 	expires: DateTime<UTC>,
 }

+/// Basic account management trait
+pub trait AccountProvider : Send + Sync {
+	/// Lists all accounts
+	fn accounts(&self) -> Result<Vec<Address>, ::std::io::Error>;
+	/// Unlocks account with the password provided
+	fn unlock_account(&self, account: &Address, pass: &str) -> Result<(), EncryptedHashMapError>;
+	/// Creates account
+	fn new_account(&self, pass: &str) -> Result<Address, ::std::io::Error>;
+	/// Returns secret for unlocked account
+	fn account_secret(&self, account: &Address) -> Result<crypto::Secret, SigningError>;
+	/// Returns secret for unlocked account
+	fn sign(&self, account: &Address, message: &H256) -> Result<crypto::Signature, SigningError>;
+}
+
+/// Thread-safe accounts management
+pub struct AccountService {
+	secret_store: RwLock<SecretStore>,
+}
+
+impl AccountProvider for AccountService {
+	/// Lists all accounts
+	fn accounts(&self) -> Result<Vec<Address>, ::std::io::Error> {
+		Ok(try!(self.secret_store.read().unwrap().accounts()).iter().map(|&(addr, _)| addr).collect::<Vec<Address>>())
+	}
+	/// Unlocks account with the password provided
+	fn unlock_account(&self, account: &Address, pass: &str) -> Result<(), EncryptedHashMapError> {
+		self.secret_store.read().unwrap().unlock_account(account, pass)
+	}
+	/// Creates account
+	fn new_account(&self, pass: &str) -> Result<Address, ::std::io::Error> {
+		self.secret_store.write().unwrap().new_account(pass)
+	}
+	/// Returns secret for unlocked account
+	fn account_secret(&self, account: &Address) -> Result<crypto::Secret, SigningError> {
+		self.secret_store.read().unwrap().account_secret(account)
+	}
+	/// Returns secret for unlocked account
+	fn sign(&self, account: &Address, message: &H256) -> Result<crypto::Signature, SigningError> {
+		self.secret_store.read().unwrap().sign(account, message)
+	}
+}
+
+impl AccountService {
+	/// New account service with the default location
+	pub fn new() -> AccountService {
+		let secret_store = RwLock::new(SecretStore::new());
+		secret_store.write().unwrap().try_import_existing();
+		AccountService {
+			secret_store: secret_store
+		}
+	}
+}
+
 impl SecretStore {
 	/// new instance of Secret Store in default home directory
 	pub fn new() -> SecretStore {
--- a/util/src/lib.rs
+++ b/util/src/lib.rs
@ -15,18 +15,18 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 #![warn(missing_docs)]
-#![cfg_attr(all(nightly, feature="dev"), feature(plugin))]
-#![cfg_attr(all(nightly, feature="dev"), plugin(clippy))]
+#![cfg_attr(feature="dev", feature(plugin))]
+#![cfg_attr(feature="dev", plugin(clippy))]

 // Clippy settings
 // TODO [todr] not really sure
-#![cfg_attr(all(nightly, feature="dev"), allow(needless_range_loop))]
+#![cfg_attr(feature="dev", allow(needless_range_loop))]
 // Shorter than if-else
-#![cfg_attr(all(nightly, feature="dev"), allow(match_bool))]
+#![cfg_attr(feature="dev", allow(match_bool))]
 // We use that to be more explicit about handled cases
-#![cfg_attr(all(nightly, feature="dev"), allow(match_same_arms))]
+#![cfg_attr(feature="dev", allow(match_same_arms))]
 // Keeps consistency (all lines with `.clone()`) and helpful when changing ref to non-ref.
-#![cfg_attr(all(nightly, feature="dev"), allow(clone_on_copy))]
+#![cfg_attr(feature="dev", allow(clone_on_copy))]

 //! Ethcore-util library
 //!
--- a/util/src/network/discovery.rs
+++ b/util/src/network/discovery.rs
@ -243,7 +243,7 @@ impl Discovery {
 		self.send_to(packet, address.clone());
 	}

-	#[cfg_attr(all(nightly, feature="dev"), allow(map_clone))]
+	#[cfg_attr(feature="dev", allow(map_clone))]
 	fn nearest_node_entries(target: &NodeId, buckets: &[NodeBucket]) -> Vec<NodeEntry> {
 		let mut found: BTreeMap<u32, Vec<&NodeEntry>> = BTreeMap::new();
 		let mut count = 0;
--- a/util/src/network/host.rs
+++ b/util/src/network/host.rs
@ -507,7 +507,7 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 		debug!(target: "network", "Connecting peers: {} sessions, {} pending", self.session_count(), self.handshake_count());
 	}

-	#[cfg_attr(all(nightly, feature="dev"), allow(single_match))]
+	#[cfg_attr(feature="dev", allow(single_match))]
 	fn connect_peer(&self, id: &NodeId, io: &IoContext<NetworkIoMessage<Message>>) {
 		if self.have_session(id)
 		{
@ -542,7 +542,7 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 		self.create_connection(socket, Some(id), io);
 	}

-	#[cfg_attr(all(nightly, feature="dev"), allow(block_in_if_condition_stmt))]
+	#[cfg_attr(feature="dev", allow(block_in_if_condition_stmt))]
 	fn create_connection(&self, socket: TcpStream, id: Option<&NodeId>, io: &IoContext<NetworkIoMessage<Message>>) {
 		let nonce = self.info.write().unwrap().next_nonce();
 		let mut handshakes = self.handshakes.write().unwrap();
--- a/util/src/panics.rs
+++ b/util/src/panics.rs
@ -71,7 +71,7 @@ impl PanicHandler {

 	/// Invoke closure and catch any possible panics.
 	/// In case of panic notifies all listeners about it.
-	#[cfg_attr(all(nightly, feature="dev"), allow(deprecated))]
+	#[cfg_attr(feature="dev", allow(deprecated))]
 	pub fn catch_panic<G, R>(&self, g: G) -> thread::Result<R> where G: FnOnce() -> R + Send + 'static {
 		let _guard = PanicGuard { handler: self };
 		let result = g();
--- a/util/src/trie/triedb.rs
+++ b/util/src/trie/triedb.rs
@ -54,7 +54,7 @@ pub struct TrieDB<'db> {
 	pub hash_count: usize,
 }

-#[cfg_attr(all(nightly, feature="dev"), allow(wrong_self_convention))]
+#[cfg_attr(feature="dev", allow(wrong_self_convention))]
 impl<'db> TrieDB<'db> {
 	/// Create a new trie with the backing database `db` and `root`
 	/// Panics, if `root` does not exist
--- a/util/src/trie/triedbmut.rs
+++ b/util/src/trie/triedbmut.rs
@ -66,7 +66,7 @@ enum MaybeChanged<'a> {
 	Changed(Bytes),
 }

-#[cfg_attr(all(nightly, feature="dev"), allow(wrong_self_convention))]
+#[cfg_attr(feature="dev", allow(wrong_self_convention))]
 impl<'db> TrieDBMut<'db> {
 	/// Create a new trie with the backing database `db` and empty `root`
 	/// Initialise to the state entailed by the genesis block.
@ -350,7 +350,7 @@ impl<'db> TrieDBMut<'db> {
 		}
 	}

-	#[cfg_attr(all(nightly, feature="dev"), allow(cyclomatic_complexity))]
+	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
 	/// Determine the RLP of the node, assuming we're inserting `partial` into the
 	/// node currently of data `old`. This will *not* delete any hash of `old` from the database;
 	/// it will just return the new RLP that includes the new node.