Merge remote-tracking branch 'parity/master' into bft

Conflicts:
	ethcore/src/client/client.rs

ethcore/src/account_db.rs

@@ -16,6 +16,7 @@
 
 //! DB backend wrapper for Account trie
 use util::*;
+use rlp::NULL_RLP;
 
 static NULL_RLP_STATIC: [u8; 1] = [0x80; 1];
 

ethcore/src/block.rs

@@ -22,6 +22,7 @@ use state::*;
 use verification::PreverifiedBlock;
 use trace::FlatTrace;
 use factory::Factories;
+use rlp::*;
 
 /// A block, encoded as it is on the block chain.
 #[derive(Default, Debug, Clone, PartialEq)]
@@ -498,7 +499,7 @@ pub fn enact(
 	{
 		if ::log::max_log_level() >= ::log::LogLevel::Trace {
 			let s = try!(State::from_existing(db.boxed_clone(), parent.state_root().clone(), engine.account_start_nonce(), factories.clone()));
-			trace!("enact(): root={}, author={}, author_balance={}\n", s.root(), header.author(), s.balance(&header.author()));
+			trace!(target: "enact", "num={}, root={}, author={}, author_balance={}\n", header.number(), s.root(), header.author(), s.balance(&header.author()));
 		}
 	}
 

ethcore/src/blockchain/block_info.rs

@@ -31,7 +31,7 @@ pub struct BlockInfo {
 }
 
 /// Describes location of newly inserted block.
-#[derive(Clone)]
+#[derive(Debug, Clone)]
 pub enum BlockLocation {
 	/// It's part of the canon chain.
 	CanonChain,
@@ -43,7 +43,7 @@ pub enum BlockLocation {
 	BranchBecomingCanonChain(BranchBecomingCanonChainData),
 }
 
-#[derive(Clone)]
+#[derive(Debug, Clone)]
 pub struct BranchBecomingCanonChainData {
 	/// Hash of the newest common ancestor with old canon chain.
 	pub ancestor: H256,

ethcore/src/blockchain/blockchain.rs

@@ -18,6 +18,7 @@
 
 use bloomchain as bc;
 use util::*;
+use rlp::*;
 use header::*;
 use super::extras::*;
 use transaction::*;
@@ -830,7 +831,7 @@ impl BlockChain {
 		}
 	}
 
-	/// Applt pending insertion updates
+	/// Apply pending insertion updates
 	pub fn commit(&self) {
 		let mut pending_best_block = self.pending_best_block.write();
 		let mut pending_write_hashes = self.pending_block_hashes.write();
@@ -961,15 +962,45 @@ impl BlockChain {
 		let block = BlockView::new(block_bytes);
 		let transaction_hashes = block.transaction_hashes();
 
-		transaction_hashes.into_iter()
-			.enumerate()
-			.fold(HashMap::new(), |mut acc, (i ,tx_hash)| {
-				acc.insert(tx_hash, TransactionAddress {
-					block_hash: info.hash.clone(),
-					index: i
-				});
-				acc
-			})
+		match info.location {
+			BlockLocation::CanonChain => {
+				transaction_hashes.into_iter()
+					.enumerate()
+					.map(|(i ,tx_hash)| {
+						(tx_hash, TransactionAddress {
+							block_hash: info.hash.clone(),
+							index: i
+						})
+					})
+					.collect()
+			},
+			BlockLocation::BranchBecomingCanonChain(ref data) => {
+				let addresses = data.enacted.iter()
+					.flat_map(|hash| {
+						let bytes = self.block_body(hash).expect("Enacted block must be in database.");
+						let hashes = BodyView::new(&bytes).transaction_hashes();
+						hashes.into_iter()
+							.enumerate()
+							.map(|(i, tx_hash)| (tx_hash, TransactionAddress {
+								block_hash: hash.clone(),
+								index: i,
+							}))
+							.collect::<HashMap<H256, TransactionAddress>>()
+					});
+
+				let current_addresses = transaction_hashes.into_iter()
+					.enumerate()
+					.map(|(i ,tx_hash)| {
+						(tx_hash, TransactionAddress {
+							block_hash: info.hash.clone(),
+							index: i
+						})
+					});
+
+				addresses.chain(current_addresses).collect()
+			},
+			BlockLocation::Branch => HashMap::new(),
+		}
 	}
 
 	/// This functions returns modified blocks blooms.
@@ -1116,7 +1147,6 @@ impl BlockChain {
 #[cfg(test)]
 mod tests {
 	#![cfg_attr(feature="dev", allow(similar_names))]
-	use std::str::FromStr;
 	use std::sync::Arc;
 	use rustc_serialize::hex::FromHex;
 	use util::{Database, DatabaseConfig};
@@ -1127,7 +1157,9 @@ mod tests {
 	use tests::helpers::*;
 	use devtools::*;
 	use blockchain::generator::{ChainGenerator, ChainIterator, BlockFinalizer};
+	use blockchain::extras::TransactionAddress;
 	use views::BlockView;
+	use transaction::{Transaction, Action};
 
 	fn new_db(path: &str) -> Arc<Database> {
 		Arc::new(Database::open(&DatabaseConfig::with_columns(::db::NUM_COLUMNS), path).unwrap())
@@ -1262,6 +1294,106 @@ mod tests {
 		// TODO: insert block that already includes one of them as an uncle to check it's not allowed.
 	}
 
+	#[test]
+	fn test_overwriting_transaction_addresses() {
+		let mut canon_chain = ChainGenerator::default();
+		let mut finalizer = BlockFinalizer::default();
+		let genesis = canon_chain.generate(&mut finalizer).unwrap();
+		let mut fork_chain = canon_chain.fork(1);
+		let mut fork_finalizer = finalizer.fork();
+
+		let t1 = Transaction {
+			nonce: 0.into(),
+			gas_price: 0.into(),
+			gas: 100_000.into(),
+			action: Action::Create,
+			value: 100.into(),
+			data: "601080600c6000396000f3006000355415600957005b60203560003555".from_hex().unwrap(),
+		}.sign(&"".sha3());
+
+		let t2 = Transaction {
+			nonce: 1.into(),
+			gas_price: 0.into(),
+			gas: 100_000.into(),
+			action: Action::Create,
+			value: 100.into(),
+			data: "601080600c6000396000f3006000355415600957005b60203560003555".from_hex().unwrap(),
+		}.sign(&"".sha3());
+
+		let t3 = Transaction {
+			nonce: 2.into(),
+			gas_price: 0.into(),
+			gas: 100_000.into(),
+			action: Action::Create,
+			value: 100.into(),
+			data: "601080600c6000396000f3006000355415600957005b60203560003555".from_hex().unwrap(),
+		}.sign(&"".sha3());
+
+		let b1a = canon_chain
+			.with_transaction(t1.clone())
+			.with_transaction(t2.clone())
+			.generate(&mut finalizer).unwrap();
+
+		// insert transactions in different order
+		let b1b = fork_chain
+			.with_transaction(t2.clone())
+			.with_transaction(t1.clone())
+			.generate(&mut fork_finalizer).unwrap();
+
+		let b2 = fork_chain
+			.with_transaction(t3.clone())
+			.generate(&mut fork_finalizer).unwrap();
+
+		let b1a_hash = BlockView::new(&b1a).header_view().sha3();
+		let b1b_hash = BlockView::new(&b1b).header_view().sha3();
+		let b2_hash = BlockView::new(&b2).header_view().sha3();
+
+		let t1_hash = t1.hash();
+		let t2_hash = t2.hash();
+		let t3_hash = t3.hash();
+
+		let temp = RandomTempPath::new();
+		let db = new_db(temp.as_str());
+		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+
+		let mut batch = db.transaction();
+		let _ = bc.insert_block(&mut batch, &b1a, vec![]);
+		bc.commit();
+		let _ = bc.insert_block(&mut batch, &b1b, vec![]);
+		bc.commit();
+		db.write(batch).unwrap();
+
+		assert_eq!(bc.best_block_hash(), b1a_hash);
+		assert_eq!(bc.transaction_address(&t1_hash).unwrap(), TransactionAddress {
+			block_hash: b1a_hash.clone(),
+			index: 0,
+		});
+		assert_eq!(bc.transaction_address(&t2_hash).unwrap(), TransactionAddress {
+			block_hash: b1a_hash.clone(),
+			index: 1,
+		});
+
+		// now let's make forked chain the canon chain
+		let mut batch = db.transaction();
+		let _ = bc.insert_block(&mut batch, &b2, vec![]);
+		bc.commit();
+		db.write(batch).unwrap();
+
+		assert_eq!(bc.best_block_hash(), b2_hash);
+		assert_eq!(bc.transaction_address(&t1_hash).unwrap(), TransactionAddress {
+			block_hash: b1b_hash.clone(),
+			index: 1,
+		});
+		assert_eq!(bc.transaction_address(&t2_hash).unwrap(), TransactionAddress {
+			block_hash: b1b_hash.clone(),
+			index: 0,
+		});
+		assert_eq!(bc.transaction_address(&t3_hash).unwrap(), TransactionAddress {
+			block_hash: b2_hash.clone(),
+			index: 0,
+		});
+	}
+
 	#[test]
 	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
 	fn test_small_fork() {
@@ -1286,7 +1418,7 @@ mod tests {
 		let db = new_db(temp.as_str());
 		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
 
-		let mut batch =db.transaction();
+		let mut batch = db.transaction();
 		let ir1 = bc.insert_block(&mut batch, &b1, vec![]);
 		bc.commit();
 		let ir2 = bc.insert_block(&mut batch, &b2, vec![]);
@@ -1462,7 +1594,7 @@ mod tests {
 	fn find_transaction_by_hash() {
 		let genesis = "f901fcf901f7a00000000000000000000000000000000000000000000000000000000000000000a01dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347948888f1f195afa192cfee860698584c030f4c9db1a0af81e09f8c46ca322193edfda764fa7e88e81923f802f1d325ec0b0308ac2cd0a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421b9010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000830200008083023e38808454c98c8142a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421880102030405060708c0c0".from_hex().unwrap();
 		let b1 = "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".from_hex().unwrap();
-		let b1_hash = H256::from_str("f53f268d23a71e85c7d6d83a9504298712b84c1a2ba220441c86eeda0bf0b6e3").unwrap();
+		let b1_hash: H256 = "f53f268d23a71e85c7d6d83a9504298712b84c1a2ba220441c86eeda0bf0b6e3".into();
 
 		let temp = RandomTempPath::new();
 		let db = new_db(temp.as_str());
@@ -1490,11 +1622,11 @@ mod tests {
 	#[test]
 	fn test_bloom_filter_simple() {
 		// TODO: From here
-		let bloom_b1 = H2048::from_str("00000020000000000000000000000000000000000000000002000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000040000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000400000000000000000000002000").unwrap();
+		let bloom_b1: H2048 = "00000020000000000000000000000000000000000000000002000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000040000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000400000000000000000000002000".into();
 
-		let bloom_b2 = H2048::from_str("00000000000000000000000000000000000000000000020000001000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000008000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000").unwrap();
+		let bloom_b2: H2048 = "00000000000000000000000000000000000000000000020000001000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000008000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000".into();
 
-		let bloom_ba = H2048::from_str("00000000000000000000000000000000000000000000020000000800000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000008000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000").unwrap();
+		let bloom_ba: H2048 = "00000000000000000000000000000000000000000000020000000800000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000008000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000".into();
 
 		let mut canon_chain = ChainGenerator::default();
 		let mut finalizer = BlockFinalizer::default();

ethcore/src/blockchain/extras.rs

@@ -18,6 +18,7 @@
 
 use bloomchain;
 use util::*;
+use rlp::*;
 use header::BlockNumber;
 use receipt::Receipt;
 use db::Key;
@@ -176,7 +177,7 @@ impl Encodable for BlockDetails {
 }
 
 /// Represents address of certain transaction within block
-#[derive(Clone)]
+#[derive(Debug, PartialEq, Clone)]
 pub struct TransactionAddress {
 	/// Block hash
 	pub block_hash: H256,

ethcore/src/blockchain/generator/block.rs

@@ -14,9 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-use util::rlp::*;
+use rlp::*;
 use util::{H256, H2048};
-use util::U256;
 use util::bytes::Bytes;
 use header::Header;
 use transaction::SignedTransaction;
@@ -24,6 +23,7 @@ use transaction::SignedTransaction;
 use super::fork::Forkable;
 use super::bloom::WithBloom;
 use super::complete::CompleteBlock;
+use super::transaction::WithTransaction;
 
 /// Helper structure, used for encoding blocks.
 #[derive(Default)]
@@ -44,7 +44,7 @@ impl Encodable for Block {
 
 impl Forkable for Block {
 	fn fork(mut self, fork_number: usize) -> Self where Self: Sized {
-		let difficulty = self.header.difficulty().clone() - U256::from(fork_number);
+		let difficulty = self.header.difficulty().clone() - fork_number.into();
 		self.header.set_difficulty(difficulty);
 		self
 	}
@@ -57,6 +57,13 @@ impl WithBloom for Block {
 	}
 }
 
+impl WithTransaction for Block {
+	fn with_transaction(mut self, transaction: SignedTransaction) -> Self where Self: Sized {
+		self.transactions.push(transaction);
+		self
+	}
+}
+
 impl CompleteBlock for Block {
 	fn complete(mut self, parent_hash: H256) -> Bytes {
 		self.header.set_parent_hash(parent_hash);

ethcore/src/blockchain/generator/generator.rs

@@ -16,10 +16,12 @@
 
 use util::{U256, H2048, Bytes};
 use header::BlockNumber;
+use transaction::SignedTransaction;
 use super::fork::Fork;
 use super::bloom::Bloom;
 use super::complete::{BlockFinalizer, CompleteBlock, Complete};
 use super::block::Block;
+use super::transaction::Transaction;
 
 /// Chain iterator interface.
 pub trait ChainIterator: Iterator + Sized {
@@ -28,6 +30,8 @@ pub trait ChainIterator: Iterator + Sized {
 	fn fork(&self, fork_number: usize) -> Fork<Self> where Self: Clone;
 	/// Should be called to make every consecutive block have given bloom.
 	fn with_bloom(&mut self, bloom: H2048) -> Bloom<Self>;
+	/// Should be called to make every consecutive block have given transaction.
+	fn with_transaction(&mut self, transaction: SignedTransaction) -> Transaction<Self>;
 	/// Should be called to complete block. Without complete, block may have incorrect hash.
 	fn complete<'a>(&'a mut self, finalizer: &'a mut BlockFinalizer) -> Complete<'a, Self>;
 	/// Completes and generates block.
@@ -49,6 +53,13 @@ impl<I> ChainIterator for I where I: Iterator + Sized {
 		}
 	}
 
+	fn with_transaction(&mut self, transaction: SignedTransaction) -> Transaction<Self> {
+		Transaction {
+			iter: self,
+			transaction: transaction,
+		}
+	}
+
 	fn complete<'a>(&'a mut self, finalizer: &'a mut BlockFinalizer) -> Complete<'a, Self> {
 		Complete {
 			iter: self,
@@ -83,7 +94,7 @@ impl Default for ChainGenerator {
 	fn default() -> Self {
 		ChainGenerator {
 			number: 0,
-			difficulty: U256::from(1000),
+			difficulty: 1000.into(),
 		}
 	}
 }

ethcore/src/blockchain/generator/mod.rs

@@ -21,6 +21,7 @@ mod block;
 mod complete;
 mod fork;
 pub mod generator;
+mod transaction;
 
 pub use self::complete::BlockFinalizer;
 pub use self::generator::{ChainIterator, ChainGenerator};

ethcore/src/blockchain/generator/transaction.rs

@@ -0,0 +1,35 @@
+// 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 transaction::SignedTransaction;
+
+pub trait WithTransaction {
+	fn with_transaction(self, transaction: SignedTransaction) -> Self where Self: Sized;
+}
+
+pub struct Transaction<'a, I> where I: 'a {
+	pub iter: &'a mut I,
+	pub transaction: SignedTransaction,
+}
+
+impl <'a, I> Iterator for Transaction<'a, I> where I: Iterator, <I as Iterator>::Item: WithTransaction {
+	type Item = <I as Iterator>::Item;
+
+	#[inline]
+	fn next(&mut self) -> Option<Self::Item> {
+		self.iter.next().map(|item| item.with_transaction(self.transaction.clone()))
+	}
+}

ethcore/src/blooms/bloom.rs

@@ -15,7 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 use bloomchain as bc;
-use util::rlp::*;
+use rlp::*;
 use util::HeapSizeOf;
 use basic_types::LogBloom;
 

ethcore/src/blooms/bloom_group.rs

@@ -15,7 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 use bloomchain::group as bc;
-use util::rlp::*;
+use rlp::*;
 use util::HeapSizeOf;
 use super::Bloom;
 

ethcore/src/builtin.rs

@@ -127,14 +127,14 @@ impl Impl for EcRecover {
 		let s = H256::from_slice(&input[96..128]);
 
 		let bit = match v[31] {
-			27 | 28 if &v.as_slice()[..31] == &[0; 31] => v[31] - 27,
+			27 | 28 if &v.0[..31] == &[0; 31] => v[31] - 27,
 			_ => return,
 		};
 
 		let s = Signature::from_rsv(&r, &s, bit);
 		if s.is_valid() {
 			if let Ok(p) = ec_recover(&s, &hash) {
-				let r = p.as_slice().sha3();
+				let r = p.sha3();
 
 				let out_len = min(output.len(), 32);
 

ethcore/src/client/client.rs

@@ -22,11 +22,11 @@ use std::time::{Instant};
 use time::precise_time_ns;
 
 // util
-use util::{journaldb, rlp, Bytes, View, PerfTimer, Itertools, Mutex, RwLock};
-use util::journaldb::JournalDB;
-use util::rlp::{UntrustedRlp};
+use util::{Bytes, PerfTimer, Itertools, Mutex, RwLock};
+use util::journaldb::{self, JournalDB};
 use util::{U256, H256, H520, Address, H2048, Uint};
 use util::sha3::*;
+use util::TrieFactory;
 use util::kvdb::*;
 
 // other
@@ -64,9 +64,10 @@ use trace;
 use trace::FlatTransactionTraces;
 use evm::Factory as EvmFactory;
 use miner::{Miner, MinerService};
-use util::TrieFactory;
 use snapshot::{self, io as snapshot_io};
 use factory::Factories;
+use rlp::{View, UntrustedRlp};
+
 
 // re-export
 pub use types::blockchain_info::BlockChainInfo;
@@ -878,7 +879,7 @@ impl BlockChainClient for Client {
 	}
 
 	fn block_receipts(&self, hash: &H256) -> Option<Bytes> {
-		self.chain.block_receipts(hash).map(|receipts| rlp::encode(&receipts).to_vec())
+		self.chain.block_receipts(hash).map(|receipts| ::rlp::encode(&receipts).to_vec())
 	}
 
 	fn import_block(&self, bytes: Bytes) -> Result<H256, BlockImportError> {

ethcore/src/client/test_client.rs

@@ -18,6 +18,7 @@
 
 use std::sync::atomic::{AtomicUsize, Ordering as AtomicOrder};
 use util::*;
+use rlp::*;
 use ethkey::{Generator, Random};
 use devtools::*;
 use transaction::{Transaction, LocalizedTransaction, SignedTransaction, Action};
@@ -33,7 +34,7 @@ use receipt::{Receipt, LocalizedReceipt};
 use blockchain::extras::BlockReceipts;
 use error::{ImportResult};
 use evm::{Factory as EvmFactory, VMType};
-use miner::{Miner, MinerService};
+use miner::{Miner, MinerService, TransactionImportResult};
 use spec::Spec;
 
 use block_queue::BlockQueueInfo;
@@ -204,7 +205,7 @@ impl TestBlockChainClient {
 					txs.append(&signed_tx);
 					txs.out()
 				},
-				_ => rlp::EMPTY_LIST_RLP.to_vec()
+				_ => ::rlp::EMPTY_LIST_RLP.to_vec()
 			};
 
 			let mut rlp = RlpStream::new_list(3);
@@ -222,8 +223,8 @@ impl TestBlockChainClient {
 		header.set_extra_data(b"This extra data is way too long to be considered valid".to_vec());
 		let mut rlp = RlpStream::new_list(3);
 		rlp.append(&header);
-		rlp.append_raw(&rlp::NULL_RLP, 1);
-		rlp.append_raw(&rlp::NULL_RLP, 1);
+		rlp.append_raw(&::rlp::NULL_RLP, 1);
+		rlp.append_raw(&::rlp::NULL_RLP, 1);
 		self.blocks.write().insert(hash, rlp.out());
 	}
 
@@ -234,8 +235,8 @@ impl TestBlockChainClient {
 		header.set_parent_hash(H256::from(42));
 		let mut rlp = RlpStream::new_list(3);
 		rlp.append(&header);
-		rlp.append_raw(&rlp::NULL_RLP, 1);
-		rlp.append_raw(&rlp::NULL_RLP, 1);
+		rlp.append_raw(&::rlp::NULL_RLP, 1);
+		rlp.append_raw(&::rlp::NULL_RLP, 1);
 		self.blocks.write().insert(hash, rlp.out());
 	}
 
@@ -254,6 +255,24 @@ impl TestBlockChainClient {
 			BlockID::Latest | BlockID::Pending => self.numbers.read().get(&(self.numbers.read().len() - 1)).cloned()
 		}
 	}
+
+	/// Inserts a transaction to miners transactions queue.
+	pub fn insert_transaction_to_queue(&self) {
+		let keypair = Random.generate().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());
+		self.set_balance(signed_tx.sender().unwrap(), 10_000_000.into());
+		let res = self.miner.import_external_transactions(self, vec![signed_tx]);
+		let res = res.into_iter().next().unwrap().expect("Successful import");
+		assert_eq!(res, TransactionImportResult::Current);
+	}
 }
 
 pub fn get_temp_journal_db() -> GuardedTempResult<Box<JournalDB>> {

ethcore/src/db.rs

@@ -20,7 +20,8 @@ use std::ops::Deref;
 use std::hash::Hash;
 use std::collections::HashMap;
 use util::{DBTransaction, Database, RwLock};
-use util::rlp::{encode, Encodable, decode, Decodable};
+
+use rlp;
 
 // database columns
 /// Column for State
@@ -83,12 +84,12 @@ pub trait Key<T> {
 /// Should be used to write value into database.
 pub trait Writable {
 	/// Writes the value into the database.
-	fn write<T, R>(&mut self, col: Option<u32>, key: &Key<T, Target = R>, value: &T) where T: Encodable, R: Deref<Target = [u8]>;
+	fn write<T, R>(&mut self, col: Option<u32>, key: &Key<T, Target = R>, value: &T) where T: rlp::Encodable, R: Deref<Target = [u8]>;
 
 	/// Writes the value into the database and updates the cache.
 	fn write_with_cache<K, T, R>(&mut self, col: Option<u32>, cache: &mut Cache<K, T>, key: K, value: T, policy: CacheUpdatePolicy) where
 	K: Key<T, Target = R> + Hash + Eq,
-	T: Encodable,
+	T: rlp::Encodable,
 	R: Deref<Target = [u8]> {
 		self.write(col, &key, &value);
 		match policy {
@@ -104,7 +105,7 @@ pub trait Writable {
 	/// Writes the values into the database and updates the cache.
 	fn extend_with_cache<K, T, R>(&mut self, col: Option<u32>, cache: &mut Cache<K, T>, values: HashMap<K, T>, policy: CacheUpdatePolicy) where
 	K: Key<T, Target = R> + Hash + Eq,
-	T: Encodable,
+	T: rlp::Encodable,
 	R: Deref<Target = [u8]> {
 		match policy {
 			CacheUpdatePolicy::Overwrite => {
@@ -127,13 +128,13 @@ pub trait Writable {
 pub trait Readable {
 	/// Returns value for given key.
 	fn read<T, R>(&self, col: Option<u32>, key: &Key<T, Target = R>) -> Option<T> where
-	T: Decodable,
+	T: rlp::Decodable,
 	R: Deref<Target = [u8]>;
 
 	/// Returns value for given key either in cache or in database.
 	fn read_with_cache<K, T, C>(&self, col: Option<u32>, cache: &RwLock<C>, key: &K) -> Option<T> where
 		K: Key<T> + Eq + Hash + Clone,
-		T: Clone + Decodable,
+		T: Clone + rlp::Decodable,
 		C: Cache<K, T> {
 		{
 			let read = cache.read();
@@ -169,17 +170,17 @@ pub trait Readable {
 }
 
 impl Writable for DBTransaction {
-	fn write<T, R>(&mut self, col: Option<u32>, key: &Key<T, Target = R>, value: &T) where T: Encodable, R: Deref<Target = [u8]> {
-		self.put(col, &key.key(), &encode(value));
+	fn write<T, R>(&mut self, col: Option<u32>, key: &Key<T, Target = R>, value: &T) where T: rlp::Encodable, R: Deref<Target = [u8]> {
+		self.put(col, &key.key(), &rlp::encode(value));
 	}
 }
 
 impl Readable for Database {
-	fn read<T, R>(&self, col: Option<u32>, key: &Key<T, Target = R>) -> Option<T> where T: Decodable, R: Deref<Target = [u8]> {
+	fn read<T, R>(&self, col: Option<u32>, key: &Key<T, Target = R>) -> Option<T> where T: rlp::Decodable, R: Deref<Target = [u8]> {
 		let result = self.get(col, &key.key());
 
 		match result {
-			Ok(option) => option.map(|v| decode(&v)),
+			Ok(option) => option.map(|v| rlp::decode(&v)),
 			Err(err) => {
 				panic!("db get failed, key: {:?}, err: {:?}", &key.key() as &[u8], err);
 			}

ethcore/src/engines/basic_authority.rs

@@ -109,7 +109,7 @@ impl Engine for BasicAuthority {
 			let message = header.bare_hash();
 			// account should be pernamently unlocked, otherwise sealing will fail
 			if let Ok(signature) = ap.sign(*block.header().author(), message) {
-				return Some(vec![encode(&(&*signature as &[u8])).to_vec()]);
+				return Some(vec![::rlp::encode(&(&*signature as &[u8])).to_vec()]);
 			} else {
 				trace!(target: "basicauthority", "generate_seal: FAIL: accounts secret key unavailable");
 			}
@@ -131,6 +131,8 @@ impl Engine for BasicAuthority {
 	}
 
 	fn verify_block_unordered(&self, header: &Header, _block: Option<&[u8]>) -> result::Result<(), Error> {
+		use rlp::{UntrustedRlp, View};
+
 		// check the signature is legit.
 		let sig = try!(UntrustedRlp::new(&header.seal()[0]).as_val::<H520>());
 		let signer = public_to_address(&try!(recover(&sig.into(), &header.bare_hash())));
@@ -172,7 +174,7 @@ impl Engine for BasicAuthority {
 impl Header {
 	/// Get the none field of the header.
 	pub fn signature(&self) -> H520 {
-		decode(&self.seal()[0])
+		::rlp::decode(&self.seal()[0])
 	}
 }
 
@@ -228,7 +230,7 @@ mod tests {
 	fn can_do_signature_verification_fail() {
 		let engine = new_test_authority().engine;
 		let mut header: Header = Header::default();
-		header.set_seal(vec![rlp::encode(&H520::default()).to_vec()]);
+		header.set_seal(vec![::rlp::encode(&H520::default()).to_vec()]);
 
 		let verify_result = engine.verify_block_unordered(&header, None);
 		assert!(verify_result.is_err());

ethcore/src/engines/instant_seal.rs

@@ -100,7 +100,7 @@ mod tests {
 
 		assert!(engine.verify_block_basic(&header, None).is_ok());
 
-		header.set_seal(vec![rlp::encode(&H520::default()).to_vec()]);
+		header.set_seal(vec![::rlp::encode(&H520::default()).to_vec()]);
 
 		assert!(engine.verify_block_unordered(&header, None).is_ok());
 	}

ethcore/src/engines/mod.rs

@@ -30,7 +30,8 @@ pub use self::tendermint::Tendermint;
 pub use self::signed_vote::SignedVote;
 pub use self::propose_collect::ProposeCollect;
 
-use common::{HashMap, SemanticVersion, Header, EnvInfo, Address, Builtin, BTreeMap, U256, Bytes, SignedTransaction, Error, UntrustedRlp, H520};
+use common::{HashMap, SemanticVersion, Header, EnvInfo, Address, Builtin, BTreeMap, U256, Bytes, SignedTransaction, Error, H520};
+use rlp::UntrustedRlp;
 use account_provider::AccountProvider;
 use block::ExecutedBlock;
 use spec::CommonParams;

ethcore/src/engines/tendermint.rs

@@ -19,6 +19,7 @@
 use std::sync::atomic::{AtomicUsize, Ordering as AtomicOrdering};
 use std::sync::Weak;
 use common::*;
+use rlp::{UntrustedRlp, View, encode};
 use account_provider::AccountProvider;
 use block::*;
 use spec::CommonParams;
@@ -392,6 +393,7 @@ mod tests {
 	use common::*;
 	use std::thread::sleep;
 	use std::time::{Duration};
+	use rlp::{UntrustedRlp, RlpStream, Stream, View};
 	use block::*;
 	use tests::helpers::*;
 	use account_provider::AccountProvider;

ethcore/src/error.rs

@@ -29,7 +29,7 @@ use ethkey::Error as EthkeyError;
 
 pub use types::executed::{ExecutionError, CallError};
 
-#[derive(Debug, PartialEq, Clone)]
+#[derive(Debug, PartialEq, Clone, Copy)]
 /// Errors concerning transaction processing.
 pub enum TransactionError {
 	/// Transaction is already imported to the queue
@@ -88,7 +88,7 @@ impl fmt::Display for TransactionError {
 	}
 }
 
-#[derive(Debug, PartialEq, Eq)]
+#[derive(Debug, PartialEq, Clone, Copy, Eq)]
 /// Errors concerning block processing.
 pub enum BlockError {
 	/// Block has too many uncles.
@@ -186,7 +186,7 @@ impl fmt::Display for BlockError {
 	}
 }
 
-#[derive(Debug, PartialEq)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 /// Import to the block queue result
 pub enum ImportError {
 	/// Already in the block chain.
@@ -307,8 +307,8 @@ impl From<ExecutionError> for Error {
 	}
 }
 
-impl From<DecoderError> for Error {
-	fn from(err: DecoderError) -> Error {
+impl From<::rlp::DecoderError> for Error {
+	fn from(err: ::rlp::DecoderError) -> Error {
 		Error::Util(UtilError::Decoder(err))
 	}
 }

ethcore/src/ethereum/ethash.rs

@@ -21,6 +21,7 @@ use spec::CommonParams;
 use engines::Engine;
 use evm::Schedule;
 use ethjson;
+use rlp::{self, UntrustedRlp, View};
 
 /// Ethash params.
 #[derive(Debug, PartialEq)]
@@ -328,17 +329,17 @@ impl Ethash {
 impl Header {
 	/// Get the none field of the header.
 	pub fn nonce(&self) -> H64 {
-		decode(&self.seal()[1])
+		rlp::decode(&self.seal()[1])
 	}
 
 	/// Get the mix hash field of the header.
 	pub fn mix_hash(&self) -> H256 {
-		decode(&self.seal()[0])
+		rlp::decode(&self.seal()[0])
 	}
 
 	/// Set the nonce and mix hash fields of the header.
 	pub fn set_nonce_and_mix_hash(&mut self, nonce: &H64, mix_hash: &H256) {
-		self.set_seal(vec![encode(mix_hash).to_vec(), encode(nonce).to_vec()]);
+		self.set_seal(vec![rlp::encode(mix_hash).to_vec(), rlp::encode(nonce).to_vec()]);
 	}
 }
 
@@ -349,6 +350,7 @@ mod tests {
 	use tests::helpers::*;
 	use super::super::new_morden;
 	use super::Ethash;
+	use rlp;
 
 	#[test]
 	fn on_close_block() {

ethcore/src/evm/evm.rs

@@ -16,11 +16,13 @@
 
 //! Evm interface.
 
-use common::*;
+use std::{ops, cmp, fmt};
+use util::{U128, U256, U512, Uint};
+use action_params::ActionParams;
 use evm::Ext;
 
 /// Evm errors.
-#[derive(Debug)]
+#[derive(Debug, Clone, Copy)]
 pub enum Error {
 	/// `OutOfGas` is returned when transaction execution runs out of gas.
 	/// The state should be reverted to the state from before the
@@ -63,6 +65,21 @@ pub enum Error {
 	Internal,
 }
 
+impl fmt::Display for Error {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		use self::Error::*;
+		let message = match *self {
+			OutOfGas => "Out of gas",
+			BadJumpDestination { .. } => "Bad jump destination",
+			BadInstruction { .. } => "Bad instruction",
+			StackUnderflow { .. } => "Stack underflow",
+			OutOfStack { .. } => "Out of stack",
+			Internal => "Internal error",
+		};
+		message.fmt(f)
+	}
+}
+
 /// A specialized version of Result over EVM errors.
 pub type Result<T> = ::std::result::Result<T, Error>;
 
@@ -193,53 +210,55 @@ pub trait Evm {
 	fn exec(&mut self, params: ActionParams, ext: &mut Ext) -> Result<GasLeft>;
 }
 
-
-#[test]
 #[cfg(test)]
-fn should_calculate_overflow_mul_shr_without_overflow() {
-	// given
-	let num = 1048576;
+mod tests {
+	use util::{U256, Uint};
+	use super::CostType;
 
-	// when
-	let (res1, o1) = U256::from(num).overflow_mul_shr(U256::from(num), 20);
-	let (res2, o2) = num.overflow_mul_shr(num, 20);
+	#[test]
+	fn should_calculate_overflow_mul_shr_without_overflow() {
+		// given
+		let num = 1048576;
 
-	// then
-	assert_eq!(res1, U256::from(num));
-	assert!(!o1);
-	assert_eq!(res2, num);
-	assert!(!o2);
-}
-
-#[test]
-#[cfg(test)]
-fn should_calculate_overflow_mul_shr_with_overflow() {
-	// given
-	let max = ::std::u64::MAX;
-	let num1 = U256([max, max, max, max]);
-	let num2 = ::std::usize::MAX;
-
-	// when
-	let (res1, o1) = num1.overflow_mul_shr(num1, 256);
-	let (res2, o2) = num2.overflow_mul_shr(num2, 64);
-
-	// then
-	assert_eq!(res2, num2 - 1);
-	assert!(o2);
-
-	assert_eq!(res1, !U256::zero() - U256::one());
-	assert!(o1);
-}
-
-#[test]
-#[cfg(test)]
-fn should_validate_u256_to_usize_conversion() {
-	// given
-	let v = U256::from(::std::usize::MAX) + U256::from(1);
-
-	// when
-	let res = usize::from_u256(v);
-
-	// then
-	assert!(res.is_err());
+		// when
+		let (res1, o1) = U256::from(num).overflow_mul_shr(U256::from(num), 20);
+		let (res2, o2) = num.overflow_mul_shr(num, 20);
+
+		// then
+		assert_eq!(res1, U256::from(num));
+		assert!(!o1);
+		assert_eq!(res2, num);
+		assert!(!o2);
+	}
+
+	#[test]
+	fn should_calculate_overflow_mul_shr_with_overflow() {
+		// given
+		let max = u64::max_value();
+		let num1 = U256([max, max, max, max]);
+		let num2 = usize::max_value();
+
+		// when
+		let (res1, o1) = num1.overflow_mul_shr(num1, 256);
+		let (res2, o2) = num2.overflow_mul_shr(num2, 64);
+
+		// then
+		assert_eq!(res2, num2 - 1);
+		assert!(o2);
+
+		assert_eq!(res1, !U256::zero() - U256::one());
+		assert!(o1);
+	}
+
+	#[test]
+	fn should_validate_u256_to_usize_conversion() {
+		// given
+		let v = U256::from(usize::max_value()) + U256::from(1);
+
+		// when
+		let res = usize::from_u256(v);
+
+		// then
+		assert!(res.is_err());
+	}
 }

ethcore/src/evm/interpreter/gasometer.rs

@@ -76,7 +76,7 @@ impl<Gas: CostType> Gasometer<Gas> {
 			instructions::SSTORE => {
 				let address = H256::from(stack.peek(0));
 				let newval = stack.peek(1);
-				let val = U256::from(ext.storage_at(&address).as_slice());
+				let val = U256::from(&*ext.storage_at(&address));
 
 				let gas = if val.is_zero() && !newval.is_zero() {
 					schedule.sstore_set_gas

ethcore/src/evm/interpreter/mod.rs

@@ -403,18 +403,18 @@ impl<Cost: CostType> Interpreter<Cost> {
 				let offset = stack.pop_back();
 				let size = stack.pop_back();
 				let sha3 = self.mem.read_slice(offset, size).sha3();
-				stack.push(U256::from(sha3.as_slice()));
+				stack.push(U256::from(&*sha3));
 			},
 			instructions::SLOAD => {
 				let key = H256::from(&stack.pop_back());
-				let word = U256::from(ext.storage_at(&key).as_slice());
+				let word = U256::from(&*ext.storage_at(&key));
 				stack.push(word);
 			},
 			instructions::SSTORE => {
 				let address = H256::from(&stack.pop_back());
 				let val = stack.pop_back();
 
-				let current_val = U256::from(ext.storage_at(&address).as_slice());
+				let current_val = U256::from(&*ext.storage_at(&address));
 				// Increase refund for clear
 				if !self.is_zero(&current_val) && self.is_zero(&val) {
 					ext.inc_sstore_clears();
@@ -491,7 +491,7 @@ impl<Cost: CostType> Interpreter<Cost> {
 			instructions::BLOCKHASH => {
 				let block_number = stack.pop_back();
 				let block_hash = ext.blockhash(&block_number);
-				stack.push(U256::from(block_hash.as_slice()));
+				stack.push(U256::from(&*block_hash));
 			},
 			instructions::COINBASE => {
 				stack.push(address_to_u256(ext.env_info().author.clone()));
@@ -807,7 +807,7 @@ fn u256_to_address(value: &U256) -> Address {
 
 #[inline]
 fn address_to_u256(value: Address) -> U256 {
-	U256::from(H256::from(value).as_slice())
+	U256::from(&*H256::from(value))
 }
 
 #[test]

ethcore/src/executive.rs

@@ -32,6 +32,8 @@ const MAX_VM_DEPTH_FOR_THREAD: usize = 64;
 
 /// Returns new address created from address and given nonce.
 pub fn contract_address(address: &Address, nonce: &U256) -> Address {
+	use rlp::{RlpStream, Stream};
+
 	let mut stream = RlpStream::new_list(2);
 	stream.append(address);
 	stream.append(nonce);
@@ -284,7 +286,7 @@ impl<'a> Executive<'a> {
 				// just drain the whole gas
 				self.state.revert_snapshot();
 
-				tracer.trace_failed_call(trace_info, vec![]);
+				tracer.trace_failed_call(trace_info, vec![], evm::Error::OutOfGas.into());
 
 				Err(evm::Error::OutOfGas)
 			}
@@ -318,7 +320,7 @@ impl<'a> Executive<'a> {
 						trace_output,
 						traces
 					),
-					_ => tracer.trace_failed_call(trace_info, traces),
+					Err(e) => tracer.trace_failed_call(trace_info, traces, e.into()),
 				};
 
 				trace!(target: "executive", "substate={:?}; unconfirmed_substate={:?}\n", substate, unconfirmed_substate);
@@ -383,7 +385,7 @@ impl<'a> Executive<'a> {
 				created,
 				subtracer.traces()
 			),
-			_ => tracer.trace_failed_create(trace_info, subtracer.traces())
+			Err(e) => tracer.trace_failed_create(trace_info, subtracer.traces(), e.into())
 		};
 
 		self.enact_result(&res, substate, unconfirmed_substate);

ethcore/src/header.rs

@@ -19,6 +19,7 @@
 use util::*;
 use basic_types::*;
 use time::get_time;
+use rlp::*;
 
 use std::cell::RefCell;
 
@@ -297,7 +298,7 @@ impl Encodable for Header {
 #[cfg(test)]
 mod tests {
 	use rustc_serialize::hex::FromHex;
-	use util::rlp::{decode, encode};
+	use rlp;
 	use super::Header;
 
 	#[test]
@@ -307,7 +308,7 @@ mod tests {
 		let mix_hash = "a0a0349d8c3df71f1a48a9df7d03fd5f14aeee7d91332c009ecaff0a71ead405bd".from_hex().unwrap();
 		let nonce = "88ab4e252a7e8c2a23".from_hex().unwrap();
 
-		let header: Header = decode(&header_rlp);
+		let header: Header = rlp::decode(&header_rlp);
 		let seal_fields = header.seal;
 		assert_eq!(seal_fields.len(), 2);
 		assert_eq!(seal_fields[0], mix_hash);
@@ -319,8 +320,8 @@ mod tests {
 		// that's rlp of block header created with ethash engine.
 		let header_rlp = "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".from_hex().unwrap();
 
-		let header: Header = decode(&header_rlp);
-		let encoded_header = encode(&header).to_vec();
+		let header: Header = rlp::decode(&header_rlp);
+		let encoded_header = rlp::encode(&header).to_vec();
 
 		assert_eq!(header_rlp, encoded_header);
 	}

ethcore/src/json_tests/transaction.rs

@@ -17,6 +17,7 @@
 use super::test_common::*;
 use evm;
 use ethjson;
+use rlp::{UntrustedRlp, View};
 
 fn do_json_test(json_data: &[u8]) -> Vec<String> {
 	let tests = ethjson::transaction::Test::load(json_data).unwrap();

ethcore/src/lib.rs

@@ -79,12 +79,9 @@
 //!   cargo build --release
 //!   ```
 
-#[macro_use] extern crate log;
-#[macro_use] extern crate ethcore_util as util;
+
 extern crate ethcore_io as io;
-#[macro_use] extern crate lazy_static;
 extern crate rustc_serialize;
-#[macro_use] extern crate heapsize;
 extern crate crypto;
 extern crate time;
 extern crate env_logger;
@@ -92,19 +89,32 @@ extern crate num_cpus;
 extern crate crossbeam;
 extern crate ethjson;
 extern crate bloomchain;
-#[macro_use] extern crate ethcore_ipc as ipc;
 extern crate rayon;
 extern crate hyper;
 extern crate ethash;
 extern crate ethkey;
-pub extern crate ethstore;
 extern crate semver;
 extern crate ethcore_ipc_nano as nanoipc;
 extern crate ethcore_devtools as devtools;
 extern crate rand;
 extern crate bit_set;
+extern crate rlp;
 
-#[cfg(feature = "jit" )] extern crate evmjit;
+#[macro_use]
+extern crate log;
+#[macro_use]
+extern crate ethcore_util as util;
+#[macro_use]
+extern crate lazy_static;
+#[macro_use]
+extern crate heapsize;
+#[macro_use]
+extern crate ethcore_ipc as ipc;
+
+#[cfg(feature = "jit" )]
+extern crate evmjit;
+
+pub extern crate ethstore;
 
 pub mod account_provider;
 pub mod engines;

ethcore/src/migrations/blocks/v8.rs

@@ -17,7 +17,7 @@
 //! This migration compresses the state db.
 
 use util::migration::{SimpleMigration, Progress};
-use util::rlp::{Compressible, UntrustedRlp, View, RlpType};
+use rlp::{Compressible, UntrustedRlp, View, RlpType};
 
 /// Compressing migration.
 #[derive(Default)]

ethcore/src/migrations/state/v7.rs

@@ -23,9 +23,11 @@ use util::Bytes;
 use util::{Address, FixedHash, H256};
 use util::kvdb::Database;
 use util::migration::{Batch, Config, Error, Migration, SimpleMigration, Progress};
-use util::rlp::{decode, Rlp, RlpStream, Stream, View};
 use util::sha3::Hashable;
 
+use rlp::{decode, Rlp, RlpStream, Stream, View};
+
+
 // attempt to migrate a key, value pair. None if migration not possible.
 fn attempt_migrate(mut key_h: H256, val: &[u8]) -> Option<H256> {
 	let val_hash = val.sha3();

ethcore/src/migrations/v9.rs

@@ -17,7 +17,7 @@
 
 //! This migration consolidates all databases into single one using Column Families.
 
-use util::{Rlp, RlpStream, View, Stream};
+use rlp::{Rlp, RlpStream, View, Stream};
 use util::kvdb::Database;
 use util::migration::{Batch, Config, Error, Migration, Progress};
 

ethcore/src/miner/transaction_queue.rs

@@ -1229,6 +1229,8 @@ mod test {
 
 	#[test]
 	fn should_reject_incorectly_signed_transaction() {
+		use rlp::{self, RlpStream, Stream};
+
 		// given
 		let mut txq = TransactionQueue::new();
 		let tx = new_unsigned_tx(123.into(), 1.into());
@@ -1243,7 +1245,7 @@ mod test {
 			s.append(&0u64); // v
 			s.append(&U256::zero()); // r
 			s.append(&U256::zero()); // s
-			decode(s.as_raw())
+			rlp::decode(s.as_raw())
 		};
 		// when
 		let res = txq.add(stx, &default_account_details, TransactionOrigin::External);

ethcore/src/pod_account.rs

@@ -19,6 +19,7 @@ use state::Account;
 use account_db::AccountDBMut;
 use ethjson;
 use types::account_diff::*;
+use rlp::{self, RlpStream, Stream};
 
 #[derive(Debug, Clone, PartialEq, Eq)]
 /// An account, expressed as Plain-Old-Data (hence the name).
@@ -57,7 +58,7 @@ impl PodAccount {
 		let mut stream = RlpStream::new_list(4);
 		stream.append(&self.nonce);
 		stream.append(&self.balance);
-		stream.append(&sec_trie_root(self.storage.iter().map(|(k, v)| (k.to_vec(), encode(&U256::from(v.as_slice())).to_vec())).collect()));
+		stream.append(&sec_trie_root(self.storage.iter().map(|(k, v)| (k.to_vec(), rlp::encode(&U256::from(&**v)).to_vec())).collect()));
 		stream.append(&self.code.as_ref().unwrap_or(&vec![]).sha3());
 		stream.out()
 	}
@@ -71,7 +72,7 @@ impl PodAccount {
 		let mut r = H256::new();
 		let mut t = SecTrieDBMut::new(db, &mut r);
 		for (k, v) in &self.storage {
-			if let Err(e) = t.insert(k, &encode(&U256::from(v.as_slice()))) {
+			if let Err(e) = t.insert(k, &rlp::encode(&U256::from(&**v))) {
 				warn!("Encountered potential DB corruption: {}", e);
 			}
 		}

ethcore/src/snapshot/account.rs

@@ -17,11 +17,12 @@
 //! Account state encoding and decoding
 
 use account_db::{AccountDB, AccountDBMut};
-use util::{U256, FixedHash, H256, Bytes, HashDB, SHA3_EMPTY};
-use util::rlp::{Rlp, RlpStream, Stream, UntrustedRlp, View};
-use util::trie::{TrieDB, Trie};
 use snapshot::Error;
 
+use util::{U256, FixedHash, H256, Bytes, HashDB, SHA3_EMPTY};
+use util::trie::{TrieDB, Trie};
+use rlp::{Rlp, RlpStream, Stream, UntrustedRlp, View};
+
 use std::collections::{HashMap, HashSet};
 
 // whether an encoded account has code and how it is referred to.
@@ -206,9 +207,9 @@ mod tests {
 	use tests::helpers::get_temp_journal_db;
 	use snapshot::tests::helpers::fill_storage;
 
-	use util::{SHA3_NULL_RLP, SHA3_EMPTY};
+	use util::sha3::{SHA3_EMPTY, SHA3_NULL_RLP};
 	use util::{Address, FixedHash, H256, HashDB};
-	use util::rlp::{UntrustedRlp, View};
+	use rlp::{UntrustedRlp, View};
 
 	use std::collections::{HashSet, HashMap};
 

ethcore/src/snapshot/block.rs

@@ -20,8 +20,8 @@ use block::Block;
 use header::Header;
 
 use views::BlockView;
-use util::rlp::{DecoderError, RlpStream, Stream, UntrustedRlp, View};
-use util::rlp::{Compressible, RlpType};
+use rlp::{DecoderError, RlpStream, Stream, UntrustedRlp, View};
+use rlp::{Compressible, RlpType};
 use util::{Bytes, Hashable, H256};
 
 const HEADER_FIELDS: usize = 10;
@@ -103,7 +103,7 @@ impl AbridgedBlock {
 		header.set_gas_used(try!(rlp.val_at(7)));
 		header.set_timestamp(try!(rlp.val_at(8)));
 		header.set_extra_data(try!(rlp.val_at(9)));
-		
+
 		let transactions = try!(rlp.val_at(10));
 		let uncles: Vec<Header> = try!(rlp.val_at(11));
 

ethcore/src/snapshot/error.rs

@@ -22,7 +22,7 @@ use ids::BlockID;
 
 use util::H256;
 use util::trie::TrieError;
-use util::rlp::DecoderError;
+use rlp::DecoderError;
 
 /// Snapshot-related errors.
 #[derive(Debug)]

ethcore/src/snapshot/io.rs

@@ -27,7 +27,7 @@ use std::path::{Path, PathBuf};
 
 use util::Bytes;
 use util::hash::H256;
-use util::rlp::{self, Encodable, RlpStream, UntrustedRlp, Stream, View};
+use rlp::{self, Encodable, RlpStream, UntrustedRlp, Stream, View};
 
 use super::ManifestData;
 
@@ -340,4 +340,92 @@ impl SnapshotReader for LooseReader {
 
 		Ok(buf)
 	}
+}
+
+#[cfg(test)]
+mod tests {
+	use devtools::RandomTempPath;
+	use util::sha3::Hashable;
+
+	use snapshot::ManifestData;
+	use super::{SnapshotWriter, SnapshotReader, PackedWriter, PackedReader, LooseWriter, LooseReader};
+
+	const STATE_CHUNKS: &'static [&'static [u8]] = &[b"dog", b"cat", b"hello world", b"hi", b"notarealchunk"];
+	const BLOCK_CHUNKS: &'static [&'static [u8]] = &[b"hello!", b"goodbye!", b"abcdefg", b"hijklmnop", b"qrstuvwxy", b"and", b"z"];
+
+	#[test]
+	fn packed_write_and_read() {
+		let path = RandomTempPath::new();
+		let mut writer = PackedWriter::new(path.as_path()).unwrap();
+
+		let mut state_hashes = Vec::new();
+		let mut block_hashes = Vec::new();
+
+		for chunk in STATE_CHUNKS {
+			let hash = chunk.sha3();
+			state_hashes.push(hash.clone());
+			writer.write_state_chunk(hash, chunk).unwrap();
+		}
+
+		for chunk in BLOCK_CHUNKS {
+			let hash = chunk.sha3();
+			block_hashes.push(hash.clone());
+			writer.write_block_chunk(chunk.sha3(), chunk).unwrap();
+		}
+
+		let manifest = ManifestData {
+			state_hashes: state_hashes,
+			block_hashes: block_hashes,
+			state_root: b"notarealroot".sha3(),
+			block_number: 12345678987654321,
+			block_hash: b"notarealblock".sha3(),
+		};
+
+		writer.finish(manifest.clone()).unwrap();
+
+		let reader = PackedReader::new(path.as_path()).unwrap().unwrap();
+		assert_eq!(reader.manifest(), &manifest);
+
+		for hash in manifest.state_hashes.iter().chain(&manifest.block_hashes) {
+			reader.chunk(hash.clone()).unwrap();
+		}
+	}
+
+	#[test]
+	fn loose_write_and_read() {
+		let path = RandomTempPath::new();
+		let mut writer = LooseWriter::new(path.as_path().into()).unwrap();
+
+		let mut state_hashes = Vec::new();
+		let mut block_hashes = Vec::new();
+
+		for chunk in STATE_CHUNKS {
+			let hash = chunk.sha3();
+			state_hashes.push(hash.clone());
+			writer.write_state_chunk(hash, chunk).unwrap();
+		}
+
+		for chunk in BLOCK_CHUNKS {
+			let hash = chunk.sha3();
+			block_hashes.push(hash.clone());
+			writer.write_block_chunk(chunk.sha3(), chunk).unwrap();
+		}
+
+		let manifest = ManifestData {
+			state_hashes: state_hashes,
+			block_hashes: block_hashes,
+			state_root: b"notarealroot".sha3(),
+			block_number: 12345678987654321,
+			block_hash: b"notarealblock".sha3(),
+		};
+
+		writer.finish(manifest.clone()).unwrap();
+
+		let reader = LooseReader::new(path.as_path().into()).unwrap();
+		assert_eq!(reader.manifest(), &manifest);
+
+		for hash in manifest.state_hashes.iter().chain(&manifest.block_hashes) {
+			reader.chunk(hash.clone()).unwrap();
+		}
+	}
 }

ethcore/src/snapshot/mod.rs

@@ -32,9 +32,9 @@ use util::Mutex;
 use util::hash::{FixedHash, H256};
 use util::journaldb::{self, Algorithm, JournalDB};
 use util::kvdb::Database;
-use util::rlp::{DecoderError, RlpStream, Stream, UntrustedRlp, View, Compressible, RlpType};
-use util::rlp::SHA3_NULL_RLP;
+use util::sha3::SHA3_NULL_RLP;
 use util::trie::{TrieDB, TrieDBMut, Trie, TrieMut};
+use rlp::{DecoderError, RlpStream, Stream, UntrustedRlp, View, Compressible, RlpType};
 
 use self::account::Account;
 use self::block::AbridgedBlock;
@@ -653,4 +653,4 @@ impl BlockRebuilder {
 			}
 		}
 	}
-}
+}

ethcore/src/snapshot/service.rs

@@ -40,7 +40,7 @@ use util::kvdb::{Database, DatabaseConfig};
 use util::snappy;
 
 /// Statuses for restorations.
-#[derive(PartialEq, Clone, Copy, Debug)]
+#[derive(PartialEq, Eq, Clone, Copy, Debug)]
 pub enum RestorationStatus {
 	///	No restoration.
 	Inactive,
@@ -519,3 +519,50 @@ impl SnapshotService for Service {
 			.expect("snapshot service and io service are kept alive by client service; qed");
 	}
 }
+
+#[cfg(test)]
+mod tests {
+	use service::ClientIoMessage;
+	use io::{IoService};
+	use devtools::RandomTempPath;
+	use tests::helpers::get_test_spec;
+	use util::journaldb::Algorithm;
+
+	use snapshot::ManifestData;
+	use super::*;
+
+	#[test]
+	fn sends_async_messages() {
+		let service = IoService::<ClientIoMessage>::start().unwrap();
+
+		let dir = RandomTempPath::new();
+		let mut dir = dir.as_path().to_owned();
+		dir.push("pruning");
+		dir.push("db");
+
+		let service = Service::new(
+			&get_test_spec(),
+			Algorithm::Archive,
+			dir,
+			service.channel()
+		).unwrap();
+
+		assert!(service.manifest().is_none());
+		assert!(service.chunk(Default::default()).is_none());
+		assert_eq!(service.status(), RestorationStatus::Inactive);
+		assert_eq!(service.chunks_done(), (0, 0));
+
+		let manifest = ManifestData {
+			state_hashes: vec![],
+			block_hashes: vec![],
+			state_root: Default::default(),
+			block_number: 0,
+			block_hash: Default::default(),
+		};
+
+		service.begin_restore(manifest);
+		service.abort_restore();
+		service.restore_state_chunk(Default::default(), vec![]);
+		service.restore_block_chunk(Default::default(), vec![]);
+	}
+}

ethcore/src/snapshot/tests/helpers.rs

@@ -25,7 +25,7 @@ use util::hash::{FixedHash, H256};
 use util::hashdb::HashDB;
 use util::trie::{Alphabet, StandardMap, SecTrieDBMut, TrieMut, ValueMode};
 use util::trie::{TrieDB, TrieDBMut, Trie};
-use util::rlp::SHA3_NULL_RLP;
+use util::sha3::SHA3_NULL_RLP;
 
 // the proportion of accounts we will alter each tick.
 const ACCOUNT_CHURN: f32 = 0.01;
@@ -78,7 +78,7 @@ impl StateProducer {
 		let new_accs = rng.gen::<u32>() % 5;
 
 		for _ in 0..new_accs {
-			let address_hash = H256::random();
+			let address_hash = H256(rng.gen());
 			let balance: usize = rng.gen();
 			let nonce: usize = rng.gen();
 			let acc = ::state::Account::new_basic(balance.into(), nonce.into()).rlp();

ethcore/src/snapshot/tests/mod.rs

@@ -19,4 +19,19 @@
 mod blocks;
 mod state;
 
-pub mod helpers;
+pub mod helpers;
+
+use super::ManifestData;
+
+#[test]
+fn manifest_rlp() {
+	let manifest = ManifestData {
+		block_hashes: Vec::new(),
+		state_hashes: Vec::new(),
+		block_number: 1234567,
+		state_root: Default::default(),
+		block_hash: Default::default(),
+	};
+	let raw = manifest.clone().into_rlp();
+	assert_eq!(ManifestData::from_rlp(&raw).unwrap(), manifest);
+}

ethcore/src/snapshot/tests/state.rs

@@ -20,7 +20,7 @@ use snapshot::{chunk_state, Progress, StateRebuilder};
 use snapshot::io::{PackedReader, PackedWriter, SnapshotReader, SnapshotWriter};
 use super::helpers::{compare_dbs, StateProducer};
 
-use rand;
+use rand::{XorShiftRng, SeedableRng};
 use util::hash::H256;
 use util::journaldb::{self, Algorithm};
 use util::kvdb::{Database, DatabaseConfig};
@@ -33,7 +33,7 @@ use std::sync::Arc;
 #[test]
 fn snap_and_restore() {
 	let mut producer = StateProducer::new();
-	let mut rng = rand::thread_rng();
+	let mut rng = XorShiftRng::from_seed([1, 2, 3, 4]);
 	let mut old_db = MemoryDB::new();
 	let db_cfg = DatabaseConfig::with_columns(::db::NUM_COLUMNS);
 

ethcore/src/spec/genesis.rs

@@ -14,8 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-use util::rlp::*;
 use util::{Address, H256, Uint, U256};
+use util::sha3::SHA3_NULL_RLP;
 use ethjson;
 use super::seal::Seal;
 

ethcore/src/spec/seal.rs

@@ -16,7 +16,7 @@
 
 //! Spec seal.
 
-use util::rlp::*;
+use rlp::*;
 use util::hash::{H64, H256};
 use ethjson;
 

ethcore/src/spec/spec.rs

@@ -24,6 +24,7 @@ use super::genesis::Genesis;
 use super::seal::Generic as GenericSeal;
 use ethereum;
 use ethjson;
+use rlp::{Rlp, RlpStream, View, Stream};
 
 /// Parameters common to all engines.
 #[derive(Debug, PartialEq, Clone)]
@@ -232,7 +233,7 @@ impl Spec {
 			{
 				let mut t = SecTrieDBMut::new(db, &mut root);
 				for (address, account) in self.genesis_state.get().iter() {
-					try!(t.insert(address.as_slice(), &account.rlp()));
+					try!(t.insert(&**address, &account.rlp()));
 				}
 			}
 			for (address, account) in self.genesis_state.get().iter() {

ethcore/src/state/account.rs

@@ -19,6 +19,7 @@
 use std::collections::hash_map::Entry;
 use util::*;
 use pod_account::*;
+use rlp::*;
 
 use std::cell::{Ref, RefCell, Cell};
 
@@ -287,7 +288,7 @@ impl Account {
 				// so we can call overloaded `to_bytes` method
 				let res = match v.is_zero() {
 					true => t.remove(k),
-					false => t.insert(k, &encode(&U256::from(v.as_slice()))),
+					false => t.insert(k, &encode(&U256::from(&*v))),
 				};
 
 				if let Err(e) = res {
@@ -333,6 +334,7 @@ mod tests {
 	use util::*;
 	use super::*;
 	use account_db::*;
+	use rlp::*;
 
 	#[test]
 	fn account_compress() {

ethcore/src/state/mod.rs

@@ -444,8 +444,7 @@ use env_info::*;
 use spec::*;
 use transaction::*;
 use util::log::init_log;
-use trace::trace;
-use trace::FlatTrace;
+use trace::{FlatTrace, TraceError, trace};
 use types::executed::CallType;
 
 #[test]
@@ -538,7 +537,7 @@ fn should_trace_failed_create_transaction() {
 			gas: 78792.into(),
 			init: vec![91, 96, 0, 86],
 		}),
-		result: trace::Res::FailedCreate,
+		result: trace::Res::FailedCreate(TraceError::OutOfGas),
 		subtraces: 0
 	}];
 
@@ -869,7 +868,7 @@ fn should_trace_failed_call_transaction() {
 			input: vec![],
 			call_type: CallType::Call,
 		}),
-		result: trace::Res::FailedCall,
+		result: trace::Res::FailedCall(TraceError::OutOfGas),
 		subtraces: 0,
 	}];
 
@@ -1084,7 +1083,7 @@ fn should_trace_failed_subcall_transaction() {
 			input: vec![],
 			call_type: CallType::Call,
 		}),
-		result: trace::Res::FailedCall,
+		result: trace::Res::FailedCall(TraceError::OutOfGas),
 	}];
 
 	assert_eq!(result.trace, expected_trace);
@@ -1217,7 +1216,7 @@ fn should_trace_failed_subcall_with_subcall_transaction() {
 			input: vec![],
 			call_type: CallType::Call,
 		}),
-		result: trace::Res::FailedCall,
+		result: trace::Res::FailedCall(TraceError::OutOfGas),
 	}, FlatTrace {
 		trace_address: vec![0, 0].into_iter().collect(),
 		subtraces: 0,

ethcore/src/tests/client.rs

@@ -22,6 +22,7 @@ use tests::helpers::*;
 use common::*;
 use devtools::*;
 use miner::Miner;
+use rlp::{Rlp, View};
 
 #[test]
 fn imports_from_empty() {

ethcore/src/tests/helpers.rs

@@ -27,6 +27,7 @@ use engines::Engine;
 use ethereum;
 use devtools::*;
 use miner::Miner;
+use rlp::{self, RlpStream, Stream};
 
 #[cfg(feature = "json-tests")]
 pub enum ChainEra {
@@ -116,7 +117,7 @@ pub fn create_test_block_with_data(header: &Header, transactions: &[SignedTransa
 	rlp.append(header);
 	rlp.begin_list(transactions.len());
 	for t in transactions {
-		rlp.append_raw(&encode::<SignedTransaction>(t).to_vec(), 1);
+		rlp.append_raw(&rlp::encode::<SignedTransaction>(t).to_vec(), 1);
 	}
 	rlp.append(&uncles);
 	rlp.out()

ethcore/src/trace/bloom.rs

@@ -1,6 +1,6 @@
 use bloomchain::Bloom;
 use bloomchain::group::{BloomGroup, GroupPosition};
-use util::rlp::*;
+use rlp::*;
 use basic_types::LogBloom;
 
 /// Helper structure representing bloom of the trace.

ethcore/src/trace/db.rs

@@ -420,7 +420,7 @@ mod tests {
 	use devtools::RandomTempPath;
 	use header::BlockNumber;
 	use trace::{Config, Switch, TraceDB, Database as TraceDatabase, DatabaseExtras, ImportRequest};
-	use trace::{Filter, LocalizedTrace, AddressesFilter};
+	use trace::{Filter, LocalizedTrace, AddressesFilter, TraceError};
 	use trace::trace::{Call, Action, Res};
 	use trace::flat::{FlatTrace, FlatBlockTraces, FlatTransactionTraces};
 	use types::executed::CallType;
@@ -560,7 +560,7 @@ mod tests {
 					input: vec![],
 					call_type: CallType::Call,
 				}),
-				result: Res::FailedCall,
+				result: Res::FailedCall(TraceError::OutOfGas),
 			}])]),
 			block_hash: block_hash.clone(),
 			block_number: block_number,
@@ -579,7 +579,7 @@ mod tests {
 				input: vec![],
 				call_type: CallType::Call,
 			}),
-			result: Res::FailedCall,
+			result: Res::FailedCall(TraceError::OutOfGas),
 			trace_address: vec![],
 			subtraces: 0,
 			transaction_number: 0,

ethcore/src/trace/executive_tracer.rs

@@ -19,7 +19,7 @@
 use util::{Bytes, Address, U256};
 use action_params::ActionParams;
 use trace::trace::{Call, Create, Action, Res, CreateResult, CallResult, VMTrace, VMOperation, VMExecutedOperation, MemoryDiff, StorageDiff, Suicide};
-use trace::{Tracer, VMTracer, FlatTrace};
+use trace::{Tracer, VMTracer, FlatTrace, TraceError};
 
 /// Simple executive tracer. Traces all calls and creates. Ignores delegatecalls.
 #[derive(Default)]
@@ -112,23 +112,23 @@ impl Tracer for ExecutiveTracer {
 		self.traces.extend(update_trace_address(subs));
 	}
 
-	fn trace_failed_call(&mut self, call: Option<Call>, subs: Vec<FlatTrace>) {
+	fn trace_failed_call(&mut self, call: Option<Call>, subs: Vec<FlatTrace>, error: TraceError) {
 		let trace = FlatTrace {
 			trace_address: Default::default(),
 			subtraces: top_level_subtraces(&subs),
 			action: Action::Call(call.expect("self.prepare_trace_call().is_some(): so we must be tracing: qed")),
-			result: Res::FailedCall,
+			result: Res::FailedCall(error),
 		};
 		debug!(target: "trace", "Traced failed call {:?}", trace);
 		self.traces.push(trace);
 		self.traces.extend(update_trace_address(subs));
 	}
 
-	fn trace_failed_create(&mut self, create: Option<Create>, subs: Vec<FlatTrace>) {
+	fn trace_failed_create(&mut self, create: Option<Create>, subs: Vec<FlatTrace>, error: TraceError) {
 		let trace = FlatTrace {
 			subtraces: top_level_subtraces(&subs),
 			action: Action::Create(create.expect("self.prepare_trace_create().is_some(): so we must be tracing: qed")),
-			result: Res::FailedCreate,
+			result: Res::FailedCreate(error),
 			trace_address: Default::default(),
 		};
 		debug!(target: "trace", "Traced failed create {:?}", trace);

ethcore/src/trace/mod.rs

@@ -24,7 +24,8 @@ mod executive_tracer;
 mod import;
 mod noop_tracer;
 
-pub use types::trace_types::*;
+pub use types::trace_types::{filter, flat, localized, trace};
+pub use types::trace_types::error::Error as TraceError;
 pub use self::config::{Config, Switch};
 pub use self::db::TraceDB;
 pub use self::error::Error;
@@ -71,10 +72,10 @@ pub trait Tracer: Send {
 	);
 
 	/// Stores failed call trace.
-	fn trace_failed_call(&mut self, call: Option<Call>, subs: Vec<FlatTrace>);
+	fn trace_failed_call(&mut self, call: Option<Call>, subs: Vec<FlatTrace>, error: TraceError);
 
 	/// Stores failed create trace.
-	fn trace_failed_create(&mut self, create: Option<Create>, subs: Vec<FlatTrace>);
+	fn trace_failed_create(&mut self, create: Option<Create>, subs: Vec<FlatTrace>, error: TraceError);
 
 	/// Stores suicide info.
 	fn trace_suicide(&mut self, address: Address, balance: U256, refund_address: Address);

ethcore/src/trace/noop_tracer.rs

@@ -18,7 +18,7 @@
 
 use util::{Bytes, Address, U256};
 use action_params::ActionParams;
-use trace::{Tracer, VMTracer, FlatTrace};
+use trace::{Tracer, VMTracer, FlatTrace, TraceError};
 use trace::trace::{Call, Create, VMTrace};
 
 /// Nonoperative tracer. Does not trace anything.
@@ -47,11 +47,11 @@ impl Tracer for NoopTracer {
 		assert!(code.is_none(), "self.prepare_trace_output().is_none(): so we can't be tracing: qed");
 	}
 
-	fn trace_failed_call(&mut self, call: Option<Call>, _: Vec<FlatTrace>) {
+	fn trace_failed_call(&mut self, call: Option<Call>, _: Vec<FlatTrace>, _: TraceError) {
 		assert!(call.is_none(), "self.prepare_trace_call().is_none(): so we can't be tracing: qed");
 	}
 
-	fn trace_failed_create(&mut self, create: Option<Create>, _: Vec<FlatTrace>) {
+	fn trace_failed_create(&mut self, create: Option<Create>, _: Vec<FlatTrace>, _: TraceError) {
 		assert!(create.is_none(), "self.prepare_trace_create().is_none(): so we can't be tracing: qed");
 	}
 

ethcore/src/types/account_diff.rs

@@ -98,12 +98,10 @@ impl AccountDiff {
 
 // TODO: refactor into something nicer.
 fn interpreted_hash(u: &H256) -> String {
-	use util::bytes::*;
-
 	if u <= &H256::from(0xffffffff) {
-		format!("{} = 0x{:x}", U256::from(u.as_slice()).low_u32(), U256::from(u.as_slice()).low_u32())
+		format!("{} = 0x{:x}", U256::from(&**u).low_u32(), U256::from(&**u).low_u32())
 	} else if u <= &H256::from(u64::max_value()) {
-		format!("{} = 0x{:x}", U256::from(u.as_slice()).low_u64(), U256::from(u.as_slice()).low_u64())
+		format!("{} = 0x{:x}", U256::from(&**u).low_u64(), U256::from(&**u).low_u64())
 //	} else if u <= &H256::from("0xffffffffffffffffffffffffffffffffffffffff") {
 //		format!("@{}", Address::from(u))
 	} else {
@@ -113,7 +111,7 @@ fn interpreted_hash(u: &H256) -> String {
 
 impl fmt::Display for AccountDiff {
 	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-		use util::bytes::*;
+		use util::bytes::ToPretty;
 
 		match self.nonce {
 			Diff::Born(ref x) => try!(write!(f, "  non {}", x)),

ethcore/src/types/executed.rs

@@ -17,7 +17,7 @@
 //! Transaction execution format module.
 
 use util::{Bytes, U256, Address, U512};
-use util::rlp::*;
+use rlp::*;
 use trace::{VMTrace, FlatTrace};
 use types::log_entry::LogEntry;
 use types::state_diff::StateDiff;
@@ -203,7 +203,8 @@ pub type ExecutionResult = Result<Executed, ExecutionError>;
 
 #[test]
 fn should_encode_and_decode_call_type() {
-	use util::rlp;
+	use rlp;
+
 	let original = CallType::Call;
 	let encoded = rlp::encode(&original);
 	let decoded = rlp::decode(&encoded);

ethcore/src/types/log_entry.rs

@@ -18,8 +18,9 @@
 
 use std::ops::Deref;
 use util::{H256, Address, Bytes, HeapSizeOf, Hashable};
-use util::rlp::*;
 use util::bloom::Bloomable;
+use rlp::*;
+
 use basic_types::LogBloom;
 use header::BlockNumber;
 use ethjson;

ethcore/src/types/receipt.rs

@@ -17,8 +17,9 @@
 //! Receipt
 
 use util::{H256, U256, Address};
-use util::rlp::*;
 use util::HeapSizeOf;
+use rlp::*;
+
 use basic_types::LogBloom;
 use header::BlockNumber;
 use log_entry::{LogEntry, LocalizedLogEntry};

ethcore/src/types/trace_types/error.rs

@@ -0,0 +1,99 @@
+// 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/>.
+
+//! Trace errors.
+
+use std::fmt;
+use rlp::{Encodable, RlpStream, Decodable, Decoder, DecoderError, Stream, View};
+use evm::Error as EvmError;
+
+/// Trace evm errors.
+#[derive(Debug, PartialEq, Clone, Binary)]
+pub enum Error {
+	/// `OutOfGas` is returned when transaction execution runs out of gas.
+	OutOfGas,
+	/// `BadJumpDestination` is returned when execution tried to move
+	/// to position that wasn't marked with JUMPDEST instruction
+	BadJumpDestination,
+	/// `BadInstructions` is returned when given instruction is not supported
+	BadInstruction,
+	/// `StackUnderflow` when there is not enough stack elements to execute instruction
+	StackUnderflow,
+	/// When execution would exceed defined Stack Limit
+	OutOfStack,
+	/// Returned on evm internal error. Should never be ignored during development.
+	/// Likely to cause consensus issues.
+	Internal,
+}
+
+impl From<EvmError> for Error {
+	fn from(e: EvmError) -> Self {
+		match e {
+			EvmError::OutOfGas => Error::OutOfGas,
+			EvmError::BadJumpDestination { .. } => Error::BadJumpDestination,
+			EvmError::BadInstruction { .. } => Error::BadInstruction,
+			EvmError::StackUnderflow { .. } => Error::StackUnderflow,
+			EvmError::OutOfStack { .. } => Error::OutOfStack,
+			EvmError::Internal => Error::Internal,
+		}
+	}
+}
+
+impl fmt::Display for Error {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		use self::Error::*;
+		let message = match *self {
+			OutOfGas => "Out of gas",
+			BadJumpDestination => "Bad jump destination",
+			BadInstruction => "Bad instruction",
+			StackUnderflow => "Stack underflow",
+			OutOfStack => "Out of stack",
+			Internal => "Internal error",
+		};
+		message.fmt(f)
+	}
+}
+
+impl Encodable for Error {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		use self::Error::*;
+		let value = match *self {
+			OutOfGas => 0u8,
+			BadJumpDestination => 1,
+			BadInstruction => 2,
+			StackUnderflow => 3,
+			OutOfStack => 4,
+			Internal => 5,
+		};
+		s.append(&value);
+	}
+}
+
+impl Decodable for Error {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		use self::Error::*;
+		let value: u8 = try!(decoder.as_rlp().as_val());
+		match value {
+			0 => Ok(OutOfGas),
+			1 => Ok(BadJumpDestination),
+			2 => Ok(BadInstruction),
+			3 => Ok(StackUnderflow),
+			4 => Ok(OutOfStack),
+			5 => Ok(Internal),
+			_ => Err(DecoderError::Custom("Invalid error type")),
+		}
+	}
+}

ethcore/src/types/trace_types/filter.rs

@@ -140,7 +140,7 @@ mod tests {
 	use util::bloom::Bloomable;
 	use trace::trace::{Action, Call, Res, Create, CreateResult, Suicide};
 	use trace::flat::FlatTrace;
-	use trace::{Filter, AddressesFilter};
+	use trace::{Filter, AddressesFilter, TraceError};
 	use types::executed::CallType;
 
 	#[test]
@@ -286,7 +286,7 @@ mod tests {
 				input: vec![0x5],
 				call_type: CallType::Call,
 			}),
-			result: Res::FailedCall,
+			result: Res::FailedCall(TraceError::OutOfGas),
 			trace_address: vec![0].into_iter().collect(),
 			subtraces: 0,
 		};

ethcore/src/types/trace_types/flat.rs

@@ -17,7 +17,7 @@
 //! Flat trace module
 
 use std::collections::VecDeque;
-use util::rlp::*;
+use rlp::*;
 use util::HeapSizeOf;
 use basic_types::LogBloom;
 use super::trace::{Action, Res};
@@ -167,7 +167,6 @@ mod tests {
 
 	#[test]
 	fn test_trace_serialization() {
-		use util::rlp;
 		// block #51921
 
 		let flat_trace = FlatTrace {
@@ -220,8 +219,8 @@ mod tests {
 			FlatTransactionTraces(vec![flat_trace1, flat_trace2])
 		]);
 
-		let encoded = rlp::encode(&block_traces);
-		let decoded = rlp::decode(&encoded);
+		let encoded = ::rlp::encode(&block_traces);
+		let decoded = ::rlp::decode(&encoded);
 		assert_eq!(block_traces, decoded);
 	}
 }

ethcore/src/types/trace_types/mod.rs

@@ -16,6 +16,7 @@
 
 //! Types used in the public api
 
+pub mod error;
 pub mod filter;
 pub mod flat;
 pub mod trace;

ethcore/src/types/trace_types/trace.rs

@@ -17,12 +17,14 @@
 //! Tracing datatypes.
 
 use util::{U256, Bytes, Address};
-use util::rlp::*;
 use util::sha3::Hashable;
 use util::bloom::Bloomable;
+use rlp::*;
+
 use action_params::ActionParams;
 use basic_types::LogBloom;
 use types::executed::CallType;
+use super::error::Error;
 
 /// `Call` result.
 #[derive(Debug, Clone, PartialEq, Default, Binary)]
@@ -321,9 +323,9 @@ pub enum Res {
 	/// Successful create action result.
 	Create(CreateResult),
 	/// Failed call.
-	FailedCall,
+	FailedCall(Error),
 	/// Failed create.
-	FailedCreate,
+	FailedCreate(Error),
 	/// None
 	None,
 }
@@ -341,13 +343,15 @@ impl Encodable for Res {
 				s.append(&1u8);
 				s.append(create);
 			},
-			Res::FailedCall => {
-				s.begin_list(1);
+			Res::FailedCall(ref err) => {
+				s.begin_list(2);
 				s.append(&2u8);
+				s.append(err);
 			},
-			Res::FailedCreate => {
-				s.begin_list(1);
+			Res::FailedCreate(ref err) => {
+				s.begin_list(2);
 				s.append(&3u8);
+				s.append(err);
 			},
 			Res::None => {
 				s.begin_list(1);
@@ -364,8 +368,8 @@ impl Decodable for Res {
 		match action_type {
 			0 => d.val_at(1).map(Res::Call),
 			1 => d.val_at(1).map(Res::Create),
-			2 => Ok(Res::FailedCall),
-			3 => Ok(Res::FailedCreate),
+			2 => d.val_at(1).map(Res::FailedCall),
+			3 => d.val_at(1).map(Res::FailedCreate),
 			4 => Ok(Res::None),
 			_ => Err(DecoderError::Custom("Invalid result type.")),
 		}
@@ -377,7 +381,7 @@ impl Res {
 	pub fn bloom(&self) -> LogBloom {
 		match *self {
 			Res::Create(ref create) => create.bloom(),
-			Res::Call(_) | Res::FailedCall | Res::FailedCreate | Res::None => Default::default(),
+			Res::Call(_) | Res::FailedCall(_) | Res::FailedCreate(_) | Res::None => Default::default(),
 		}
 	}
 }

ethcore/src/types/transaction.rs

@@ -18,7 +18,7 @@
 
 use std::ops::Deref;
 use std::cell::*;
-use util::rlp::*;
+use rlp::*;
 use util::sha3::Hashable;
 use util::{H256, Address, U256, Bytes};
 use ethkey::{Signature, sign, Secret, recover, public_to_address, Error as EthkeyError};
@@ -275,7 +275,7 @@ impl SignedTransaction {
 		match hash {
 			Some(h) => h,
 			None => {
-				let h = self.rlp_sha3();
+				let h = (&*self.rlp_bytes()).sha3();
 				self.hash.set(Some(h));
 				h
 			}

ethcore/src/types/transaction_import.rs

@@ -18,9 +18,8 @@
 
 use ipc::binary::{BinaryConvertError, BinaryConvertable};
 use error::{TransactionError, Error};
-use util::Populatable;
 
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 /// Represents the result of importing transaction.
 pub enum TransactionImportResult {
 	/// Transaction was imported to current queue.

ethcore/src/verification/verification.rs

@@ -24,6 +24,7 @@
 use common::*;
 use engines::Engine;
 use blockchain::*;
+use rlp::{UntrustedRlp, View};
 
 /// Preprocessed block data gathered in `verify_block_unordered` call
 pub struct PreverifiedBlock {
@@ -240,6 +241,7 @@ mod tests {
 	use spec::*;
 	use transaction::*;
 	use tests::helpers::*;
+	use rlp::View;
 
 	fn check_ok(result: Result<(), Error>) {
 		result.unwrap_or_else(|e| panic!("Block verification failed: {:?}", e));
@@ -346,6 +348,8 @@ mod tests {
 	#[test]
 	#[cfg_attr(feature="dev", allow(similar_names))]
 	fn test_verify_block() {
+		use rlp::{RlpStream, Stream};
+
 		// Test against morden
 		let mut good = Header::new();
 		let spec = Spec::new_test();
@@ -411,7 +415,7 @@ mod tests {
 		let mut uncles_rlp = RlpStream::new();
 		uncles_rlp.append(&good_uncles);
 		let good_uncles_hash = uncles_rlp.as_raw().sha3();
-		let good_transactions_root = ordered_trie_root(good_transactions.iter().map(|t| encode::<SignedTransaction>(t).to_vec()).collect());
+		let good_transactions_root = ordered_trie_root(good_transactions.iter().map(|t| ::rlp::encode::<SignedTransaction>(t).to_vec()).collect());
 
 		let mut parent = good.clone();
 		parent.set_number(9);

ethcore/src/views/block.rs

@@ -20,6 +20,7 @@ use util::*;
 use header::*;
 use transaction::*;
 use super::{TransactionView, HeaderView};
+use rlp::{Rlp, View};
 
 /// View onto block rlp.
 pub struct BlockView<'a> {

ethcore/src/views/body.rs

@@ -20,6 +20,7 @@ use util::*;
 use header::*;
 use transaction::*;
 use super::{TransactionView, HeaderView};
+use rlp::{Rlp, View};
 
 /// View onto block rlp.
 pub struct BodyView<'a> {

ethcore/src/views/header.rs

@@ -16,7 +16,8 @@
 
 //! View onto block header rlp
 
-use util::{Rlp, U256, Bytes, Hashable, H256, Address, H2048, View};
+use util::{U256, Bytes, Hashable, H256, Address, H2048};
+use rlp::{Rlp, View};
 use header::BlockNumber;
 
 /// View onto block header rlp.

ethcore/src/views/transaction.rs

@@ -15,7 +15,8 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 //! View onto transaction rlp
-use util::{Rlp, U256, Bytes, Hashable, H256, View};
+use util::{U256, Bytes, Hashable, H256};
+use rlp::{Rlp, View};
 
 /// View onto transaction rlp.
 pub struct TransactionView<'a> {