Merge branch 'signer-wsnotification' into signer-ui

.travis.yml

@@ -33,7 +33,7 @@ env:
   global:
   # GH_TOKEN
   - secure: 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
-  - TARGETS="-p ethash -p ethcore-util -p ethcore -p ethsync -p ethcore-rpc -p parity -p ethminer -p ethjson -p ethcore-dapps -p ethcore-signer"
+  - TARGETS="-p ethash -p ethcore-util -p ethcore -p ethsync -p ethcore-rpc -p parity -p ethjson -p ethcore-dapps -p ethcore-signer"
   - ARCHIVE_SUFFIX="-${TRAVIS_OS_NAME}-${TRAVIS_TAG}"
   - KCOV_FEATURES=""
   - KCOV_CMD="./kcov-master/tmp/usr/local/bin/kcov --exclude-pattern /usr/,/.cargo,/root/.multirust,src/tests,util/json-tests,util/src/network/tests,sync/src/tests,ethcore/src/tests,ethcore/src/evm/tests target/kcov"
@@ -72,7 +72,6 @@ after_success: |
   $KCOV_CMD target/debug/deps/ethcore_rpc-* &&
   $KCOV_CMD target/debug/deps/ethcore_dapps-* &&
   $KCOV_CMD target/debug/deps/ethcore_signer-* &&
-  $KCOV_CMD target/debug/deps/ethminer-* &&
   $KCOV_CMD target/debug/deps/ethjson-* &&
   $KCOV_CMD target/debug/parity-* &&
   [ $TRAVIS_BRANCH = master ] &&

Cargo.lock

@@ -17,7 +17,6 @@ dependencies = [
  "ethcore-rpc 1.2.0",
  "ethcore-signer 1.2.0",
  "ethcore-util 1.2.0",
- "ethminer 1.2.0",
  "ethsync 1.2.0",
  "fdlimit 0.1.0",
  "hyper 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -255,6 +254,7 @@ dependencies = [
  "lazy_static 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rust-crypto 0.2.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "syntex 0.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -334,7 +334,6 @@ dependencies = [
  "ethcore-devtools 1.2.0",
  "ethcore-util 1.2.0",
  "ethjson 0.1.0",
- "ethminer 1.2.0",
  "ethsync 1.2.0",
  "json-ipc-server 0.1.0 (git+https://github.com/ethcore/json-ipc-server.git)",
  "jsonrpc-core 2.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -392,7 +391,7 @@ dependencies = [
  "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)",
  "sha3 0.1.0",
- "slab 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "slab 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "target_info 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "tiny-keccak 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -411,20 +410,6 @@ dependencies = [
  "syntex 0.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "ethminer"
-version = "1.2.0"
-dependencies = [
- "clippy 0.0.69 (registry+https://github.com/rust-lang/crates.io-index)",
- "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "ethcore 1.2.0",
- "ethcore-util 1.2.0",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "ethsync"
 version = "1.2.0"
@@ -433,7 +418,6 @@ dependencies = [
  "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethcore 1.2.0",
  "ethcore-util 1.2.0",
- "ethminer 1.2.0",
  "heapsize 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1222,6 +1206,11 @@ name = "slab"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "slab"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "solicit"
 version = "0.4.4"

Cargo.toml

@@ -27,7 +27,6 @@ clippy = { version = "0.0.69", optional = true}
 ethcore = { path = "ethcore" }
 ethcore-util = { path = "util" }
 ethsync = { path = "sync" }
-ethminer = { path = "miner" }
 ethcore-devtools = { path = "devtools" }
 ethcore-rpc = { path = "rpc", optional = true }
 ethcore-signer = { path = "signer", optional = true }
@@ -46,7 +45,7 @@ default-features = false
 default = ["rpc", "dapps", "ethcore-signer"]
 rpc = ["ethcore-rpc"]
 dapps = ["ethcore-dapps"]
-dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethsync/dev", "ethcore-rpc/dev", "ethminer/dev",
+dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethsync/dev", "ethcore-rpc/dev",
 "ethcore-dapps/dev", "ethcore-signer/dev"]
 travis-beta = ["ethcore/json-tests"]
 travis-nightly = ["ethcore/json-tests", "dev"]

README.md

@@ -1,4 +1,5 @@
-# ethcore
+# [Parity](https://ethcore.io/parity.html)
+### Fast, light, and robust Ethereum implementation
 
 [![Build Status][travis-image]][travis-url] [![Coverage Status][coveralls-image]][coveralls-url] [![Join the chat at https://gitter.im/trogdoro/xiki][gitter-image]][gitter-url] [![GPLv3][license-image]][license-url]
 
@@ -11,30 +12,64 @@
 [license-image]: https://img.shields.io/badge/license-GPL%20v3-green.svg
 [license-url]: http://www.gnu.org/licenses/gpl-3.0.en.html
 
-[Documentation](http://ethcore.github.io/parity/ethcore/index.html)
+[Internal Documentation](http://ethcore.github.io/parity/ethcore/index.html)
 
-### Building from source
+----
 
-First (if you don't already have it) get multirust:
+## About Parity
+
+Parity's goal is to be the fastest, lightest, and most secure Ethereum client. We are developing Parity using the sophisticated and
+cutting-edge Rust programming language. Parity is licensed under the GPLv3, and can be used for all your Ethereum needs.
+
+By default, Parity will run a JSONRPC server on `127.0.0.1:8545`. This is fully configurable and supports a number
+of RPC APIs.
+
+Parity also runs a server for running decentralized apps, or "Dapps", on `http://127.0.0.1:8080`.
+This includes a few useful Dapps, including Ethereum Wallet, Maker OTC, and a node status page.
+In a near-future release, it will be easy to install Dapps and use them through this web interface.
+
+If you run into an issue while using parity, feel free to file one in this repository
+or hop on our [gitter chat room]([gitter-url]) to ask a question. We are glad to help!
+
+Parity's current release is 1.1. You can download it at https://ethcore.io/parity.html or follow the instructions
+below to build from source.
+
+----
+
+## Building from source
+
+Parity is fully compatible with Stable Rust.
+
+We recommend installing Rust through [multirust](https://github.com/brson/multirust). If you don't already have multirust, you can install it like this:
 
 - Linux:
 ```bash
-curl -sf https://raw.githubusercontent.com/brson/multirust/master/quick-install.sh | sh
+$ curl -sf https://raw.githubusercontent.com/brson/multirust/master/quick-install.sh | sh
 ```
 
 - OSX with Homebrew:
 ```bash
-brew update && brew install multirust
+$ brew update && brew install multirust
-multirust default stable
+$ multirust default stable
 ```
 
 Then, download and build Parity:
 
 ```bash
 # download Parity code
-git clone https://github.com/ethcore/parity
+$ git clone https://github.com/ethcore/parity
-cd parity
+$ cd parity
 
 # build in release mode
-cargo build --release
+$ cargo build --release
 ```
+
+This will produce an executable in the `target/release` subdirectory.
+Either run `cd target/release`, or copy `target/release/parity` to another location.
+
+To get started, just run
+```bash
+$ parity
+```
+
+and parity will begin syncing the Ethereum blockchain.

devtools/src/lib.rs

@@ -21,6 +21,8 @@ extern crate rand;
 
 pub mod random_path;
 pub mod test_socket;
+pub mod stop_guard;
 
 pub use random_path::*;
 pub use test_socket::*;
+pub use stop_guard::*;

devtools/src/random_path.rs

@@ -26,7 +26,11 @@ pub struct RandomTempPath {
 }
 
 pub fn random_filename() -> String {
-	(0..8).map(|_| ((random::<f32>() * 26.0) as u8 + 97) as char).collect()
+	random_str(8)
+}
+
+pub fn random_str(len: usize) -> String {
+	(0..len).map(|_| ((random::<f32>() * 26.0) as u8 + 97) as char).collect()
 }
 
 impl RandomTempPath {
@@ -54,6 +58,12 @@ impl RandomTempPath {
 	pub fn as_str(&self) -> &str {
 		self.path.to_str().unwrap()
 	}
+
+	pub fn new_in(&self, name: &str) -> String {
+		let mut path = self.path.clone();
+		path.push(name);
+		path.to_str().unwrap().to_owned()
+	}
 }
 
 impl Drop for RandomTempPath {

devtools/src/stop_guard.rs

@@ -14,12 +14,32 @@
 // 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;
+//! Stop guard mod
 
-use rustc_version::{version_meta, Channel};
+use std::sync::Arc;
+use std::sync::atomic::*;
 
-fn main() {
+/// Stop guard that will set a stop flag on drop
-	if let Channel::Nightly = version_meta().channel {
+pub struct StopGuard {
-		println!("cargo:rustc-cfg=nightly");
+	flag: Arc<AtomicBool>,
+}
+
+impl StopGuard {
+	/// Create a stop guard
+	pub fn new() -> StopGuard {
+		StopGuard {
+			flag: Arc::new(AtomicBool::new(false))
+		}
+	}
+
+	/// Share stop guard between the threads
+	pub fn share(&self) -> Arc<AtomicBool> {
+		self.flag.clone()
+	}
+}
+
+impl Drop for StopGuard {
+	fn drop(&mut self) {
+		self.flag.store(true, Ordering::Relaxed)
 	}
 }

ethcore/Cargo.toml

@@ -29,6 +29,7 @@ ethcore-devtools = { path = "../devtools" }
 ethjson = { path = "../json" }
 bloomchain = "0.1"
 "ethcore-ipc" = { path = "../ipc/rpc" }
+rayon = "0.3.1"
 
 [features]
 jit = ["evmjit"]

ethcore/res/ethereum/morden.json

@@ -34,17 +34,8 @@
 		"gasLimit": "0x2fefd8"
 	},
 	"nodes": [
-		"enode://b1217cbaa440e35ed471157123fe468e19e8b5ad5bedb4b1fdbcbdab6fb2f5ed3e95dd9c24a22a79fdb2352204cea207df27d92bfd21bfd41545e8b16f637499@104.44.138.37:30303",
-		"enode://7ee7195bfac561ec938a72cd84cd1a5d2b334415263feddc325b20b5010446fc6c361297d13decab4039028fa659c1e27cca1396574b87cc7b29eea2985e97fe@108.61.197.28:30303",
-		"enode://933c5d5470b77537e7d9c1ee686132b5032dd3e2a096d2f64d2004df4ce9fca4ad6da5e358edcc8f81e65f047e40045600181f5fb35066e771025f6cca8e7952@46.101.114.191:30303",
-		"enode://ad4028ba28783d5bf58f512cb4e24a8ce980d768177c4974e1140b16b925132c947349db9ca3646752891b382dafc839a0c0716c3764c1ed9d424f09d13d01cf@148.251.220.116:30303",
-		"enode://c54ddaacddc7029683c80edae91015520eb2712176fbe6fdb7a5a074659270638f1266cba1731681c7cb785bceb02ca8d8b23024e3ec736fc5579f2042be97ae@54.175.255.230:30303",
-		"enode://ceb5c0f85eb994dbe9693bf46d99b03f6b838d17cc74e68d5eb003171ff39e5f120b17f965b267c319303f94d80b9d994b77062fb1486d76ce95d9f3d8fe1cb4@46.101.122.141:30303",
 		"enode://e731347db0521f3476e6bbbb83375dcd7133a1601425ebd15fd10f3835fd4c304fba6282087ca5a0deeafadf0aa0d4fd56c3323331901c1f38bd181c283e3e35@128.199.55.137:30303",
-		"enode://e941c58fed2709d792f552f408d2162c3d0a5597d22d1da617a9c9e6181f3251056a96adb45ae22eba70119355227298dc7e6dff805b092bae7da2f8564de422@85.25.217.23:30303",
+		"enode://ceb5c0f85eb994dbe9693bf46d99b03f6b838d17cc74e68d5eb003171ff39e5f120b17f965b267c319303f94d80b9d994b77062fb1486d76ce95d9f3d8fe1cb4@46.101.122.141:30303"
-		"enode://f4b73c9d11a780293ff0ca7afa12c67797afdc33a4797a7c2ecc5b87e455b32a8b9e9804f2004072bac38350bf82d52521d1a09590d2079705fc8357aef2bf9c@71.202.223.50:56603",
-		"enode://1173eea53e0cb2b8da92423e44cf4cbafbc8ea16c1558cf06e18dfc5a2fc9b140cc802a4362b4c773fb1442541e6f2a225b200bb4c1f6b347e7510a50fa4873f@104.41.138.167:30300",
-		"enode://1aad341327808738ad34655611f1b13293c4155dde36c8e3788128829f15cc6db2da9435f29520553d4efc134aadc50115690194ac3af519aac7a388b524811e@109.188.125.2:30303"
 	],
 	"accounts": {
 		"0000000000000000000000000000000000000001": { "balance": "1", "nonce": "1048576", "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },

ethcore/src/client/client.rs

@@ -37,7 +37,7 @@ use filter::Filter;
 use log_entry::LocalizedLogEntry;
 use block_queue::{BlockQueue, BlockQueueInfo};
 use blockchain::{BlockChain, BlockProvider, TreeRoute, ImportRoute};
-use client::{BlockID, TransactionID, UncleID, TraceId, ClientConfig, BlockChainClient, TraceFilter};
+use client::{BlockID, TransactionID, UncleID, TraceId, ClientConfig, BlockChainClient, MiningBlockChainClient, TraceFilter};
 use client::Error as ClientError;
 use env_info::EnvInfo;
 use executive::{Executive, Executed, TransactOptions, contract_address};
@@ -48,6 +48,7 @@ use trace;
 pub use types::blockchain_info::BlockChainInfo;
 pub use types::block_status::BlockStatus;
 use evm::Factory as EvmFactory;
+use miner::{Miner, MinerService, TransactionImportResult, AccountDetails};
 
 impl fmt::Display for BlockChainInfo {
 	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
@@ -90,6 +91,7 @@ pub struct Client<V = CanonVerifier> where V: Verifier {
 	panic_handler: Arc<PanicHandler>,
 	verifier: PhantomData<V>,
 	vm_factory: Arc<EvmFactory>,
+	miner: Arc<Miner>,
 }
 
 const HISTORY: u64 = 1200;
@@ -102,8 +104,8 @@ const CLIENT_DB_VER_STR: &'static str = "5.3";
 
 impl Client<CanonVerifier> {
 	/// Create a new client with given spec and DB path.
-	pub fn new(config: ClientConfig, spec: Spec, path: &Path, message_channel: IoChannel<NetSyncMessage> ) -> Result<Arc<Client>, ClientError> {
+	pub fn new(config: ClientConfig, spec: Spec, path: &Path, miner: Arc<Miner>, message_channel: IoChannel<NetSyncMessage> ) -> Result<Arc<Client>, ClientError> {
-		Client::<CanonVerifier>::new_with_verifier(config, spec, path, message_channel)
+		Client::<CanonVerifier>::new_with_verifier(config, spec, path, miner, message_channel)
 	}
 }
 
@@ -126,7 +128,14 @@ pub fn append_path(path: &Path, item: &str) -> String {
 
 impl<V> Client<V> where V: Verifier {
 	///  Create a new client with given spec and DB path and custom verifier.
-	pub fn new_with_verifier(config: ClientConfig, spec: Spec, path: &Path, message_channel: IoChannel<NetSyncMessage> ) -> Result<Arc<Client<V>>, ClientError> {
+	pub fn new_with_verifier(
+		config: ClientConfig,
+		spec: Spec,
+		path: &Path,
+		miner: Arc<Miner>,
+		message_channel: IoChannel<NetSyncMessage>)
+		-> Result<Arc<Client<V>>, ClientError>
+	{
 		let path = get_db_path(path, config.pruning, spec.genesis_header().hash());
 		let gb = spec.genesis_block();
 		let chain = Arc::new(BlockChain::new(config.blockchain, &gb, &path));
@@ -155,6 +164,7 @@ impl<V> Client<V> where V: Verifier {
 			panic_handler: panic_handler,
 			verifier: PhantomData,
 			vm_factory: Arc::new(EvmFactory::new(config.vm_type)),
+			miner: miner,
 		};
 
 		Ok(Arc::new(client))
@@ -328,6 +338,11 @@ impl<V> Client<V> where V: Verifier {
 		{
 			if !imported_blocks.is_empty() && self.block_queue.queue_info().is_empty() {
 				let (enacted, retracted) = self.calculate_enacted_retracted(import_results);
+
+				if self.queue_info().is_empty() {
+					self.miner.chain_new_blocks(self, &imported_blocks, &invalid_blocks, &enacted, &retracted);
+				}
+
 				io.send(NetworkIoMessage::User(SyncMessage::NewChainBlocks {
 					imported: imported_blocks,
 					invalid: invalid_blocks,
@@ -339,7 +354,7 @@ impl<V> Client<V> where V: Verifier {
 
 		{
 			if self.chain_info().best_block_hash != original_best {
-				io.send(NetworkIoMessage::User(SyncMessage::NewChainHead)).unwrap();
+				self.miner.update_sealing(self);
 			}
 		}
 
@@ -421,7 +436,7 @@ impl<V> Client<V> where V: Verifier {
 }
 
 impl<V> BlockChainClient for Client<V> where V: Verifier {
-	fn call(&self, t: &SignedTransaction) -> Result<Executed, ExecutionError> {
+	fn call(&self, t: &SignedTransaction, vm_tracing: bool) -> Result<Executed, ExecutionError> {
 		let header = self.block_header(BlockID::Latest).unwrap();
 		let view = HeaderView::new(&header);
 		let last_hashes = self.build_last_hashes(view.hash());
@@ -441,88 +456,17 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 			ExecutionError::TransactionMalformed(message)
 		}));
 		let balance = state.balance(&sender);
-		// give the sender max balance
+		// give the sender a decent balance
 		state.sub_balance(&sender, &balance);
-		state.add_balance(&sender, &U256::max_value());
+		state.add_balance(&sender, &(U256::from(1) << 200));
-		let options = TransactOptions { tracing: false, check_nonce: false };
+		let options = TransactOptions { tracing: false, vm_tracing: vm_tracing, check_nonce: false };
 		Executive::new(&mut state, &env_info, self.engine.deref().deref(), &self.vm_factory).transact(t, options)
 	}
 
-	// TODO [todr] Should be moved to miner crate eventually.
-	fn try_seal(&self, block: LockedBlock, seal: Vec<Bytes>) -> Result<SealedBlock, LockedBlock> {
-		block.try_seal(self.engine.deref().deref(), seal)
-	}
-
 	fn vm_factory(&self) -> &EvmFactory {
 		&self.vm_factory
 	}
 
-	// TODO [todr] Should be moved to miner crate eventually.
-	fn prepare_sealing(&self, author: Address, gas_floor_target: U256, extra_data: Bytes, transactions: Vec<SignedTransaction>)
-		-> (Option<ClosedBlock>, HashSet<H256>) {
-		let engine = self.engine.deref().deref();
-		let h = self.chain.best_block_hash();
-		let mut invalid_transactions = HashSet::new();
-
-		let mut b = OpenBlock::new(
-			engine,
-			&self.vm_factory,
-			false,	// TODO: this will need to be parameterised once we want to do immediate mining insertion.
-			self.state_db.lock().unwrap().boxed_clone(),
-			match self.chain.block_header(&h) { Some(ref x) => x, None => { return (None, invalid_transactions) } },
-			self.build_last_hashes(h.clone()),
-			author,
-			gas_floor_target,
-			extra_data,
-		);
-
-		// Add uncles
-		self.chain
-			.find_uncle_headers(&h, engine.maximum_uncle_age())
-			.unwrap()
-			.into_iter()
-			.take(engine.maximum_uncle_count())
-			.foreach(|h| {
-				b.push_uncle(h).unwrap();
-			});
-
-		// Add transactions
-		let block_number = b.block().header().number();
-		let min_tx_gas = U256::from(self.engine.schedule(&b.env_info()).tx_gas);
-
-		for tx in transactions {
-			// Push transaction to block
-			let hash = tx.hash();
-			let import = b.push_transaction(tx, None);
-
-			match import {
-				Err(Error::Execution(ExecutionError::BlockGasLimitReached { gas_limit, gas_used, .. })) => {
-					trace!(target: "miner", "Skipping adding transaction to block because of gas limit: {:?}", hash);
-					// Exit early if gas left is smaller then min_tx_gas
-					if gas_limit - gas_used < min_tx_gas {
-						break;
-					}
-				},
-				Err(e) => {
-					invalid_transactions.insert(hash);
-					trace!(target: "miner",
-						   "Error adding transaction to block: number={}. transaction_hash={:?}, Error: {:?}",
-						   block_number, hash, e);
-				},
-				_ => {}
-			}
-		}
-
-		// And close
-		let b = b.close();
-		trace!(target: "miner", "Sealing: number={}, hash={}, diff={}",
-			   b.block().header().number(),
-			   b.hash(),
-			   b.block().header().difficulty()
-		);
-		(Some(b), invalid_transactions)
-	}
-
 	fn block_header(&self, id: BlockID) -> Option<Bytes> {
 		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()))
 	}
@@ -774,6 +718,89 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 	fn last_hashes(&self) -> LastHashes {
 		self.build_last_hashes(self.chain.best_block_hash())
 	}
+
+	fn import_transactions(&self, transactions: Vec<SignedTransaction>) -> Vec<Result<TransactionImportResult, Error>> {
+		let fetch_account = |a: &Address| AccountDetails {
+			nonce: self.latest_nonce(a),
+			balance: self.latest_balance(a),
+		};
+		self.miner.import_transactions(transactions, fetch_account)
+	}
+
+	fn all_transactions(&self) -> Vec<SignedTransaction> {
+		self.miner.all_transactions()
+	}
+}
+
+impl<V> MiningBlockChainClient for Client<V> where V: Verifier {
+	fn prepare_sealing(&self, author: Address, gas_floor_target: U256, extra_data: Bytes, transactions: Vec<SignedTransaction>)
+		-> (Option<ClosedBlock>, HashSet<H256>) {
+		let engine = self.engine.deref().deref();
+		let h = self.chain.best_block_hash();
+		let mut invalid_transactions = HashSet::new();
+
+		let mut b = OpenBlock::new(
+			engine,
+			&self.vm_factory,
+			false,	// TODO: this will need to be parameterised once we want to do immediate mining insertion.
+			self.state_db.lock().unwrap().boxed_clone(),
+			match self.chain.block_header(&h) { Some(ref x) => x, None => { return (None, invalid_transactions) } },
+			self.build_last_hashes(h.clone()),
+			author,
+			gas_floor_target,
+			extra_data,
+		);
+
+		// Add uncles
+		self.chain
+			.find_uncle_headers(&h, engine.maximum_uncle_age())
+			.unwrap()
+			.into_iter()
+			.take(engine.maximum_uncle_count())
+			.foreach(|h| {
+				b.push_uncle(h).unwrap();
+			});
+
+		// Add transactions
+		let block_number = b.block().header().number();
+		let min_tx_gas = U256::from(self.engine.schedule(&b.env_info()).tx_gas);
+
+		for tx in transactions {
+			// Push transaction to block
+			let hash = tx.hash();
+			let import = b.push_transaction(tx, None);
+
+			match import {
+				Err(Error::Execution(ExecutionError::BlockGasLimitReached { gas_limit, gas_used, .. })) => {
+					trace!(target: "miner", "Skipping adding transaction to block because of gas limit: {:?}", hash);
+					// Exit early if gas left is smaller then min_tx_gas
+					if gas_limit - gas_used < min_tx_gas {
+						break;
+					}
+				},
+				Err(e) => {
+					invalid_transactions.insert(hash);
+					trace!(target: "miner",
+						   "Error adding transaction to block: number={}. transaction_hash={:?}, Error: {:?}",
+						   block_number, hash, e);
+				},
+				_ => {}
+			}
+		}
+
+		// And close
+		let b = b.close();
+		trace!(target: "miner", "Sealing: number={}, hash={}, diff={}",
+			   b.block().header().number(),
+			   b.hash(),
+			   b.block().header().difficulty()
+		);
+		(Some(b), invalid_transactions)
+	}
+
+	fn try_seal(&self, block: LockedBlock, seal: Vec<Bytes>) -> Result<SealedBlock, LockedBlock> {
+		block.try_seal(self.engine.deref().deref(), seal)
+	}
 }
 
 impl MayPanic for Client {

ethcore/src/client/mod.rs

@@ -46,6 +46,8 @@ use error::{ImportResult, ExecutionError};
 use receipt::LocalizedReceipt;
 use trace::LocalizedTrace;
 use evm::Factory as EvmFactory;
+use miner::{TransactionImportResult};
+use error::Error as EthError;
 
 /// Blockchain database client. Owns and manages a blockchain and a block queue.
 pub trait BlockChainClient : Sync + Send {
@@ -154,17 +156,9 @@ pub trait BlockChainClient : Sync + Send {
 	/// Returns logs matching given filter.
 	fn logs(&self, filter: Filter) -> Vec<LocalizedLogEntry>;
 
-	// TODO [todr] Should be moved to miner crate eventually.
-	/// Returns ClosedBlock prepared for sealing.
-	fn prepare_sealing(&self, author: Address, gas_floor_target: U256, extra_data: Bytes, transactions: Vec<SignedTransaction>)
-		-> (Option<ClosedBlock>, HashSet<H256>);
-
-	// TODO [todr] Should be moved to miner crate eventually.
-	/// Attempts to seal given block. Returns `SealedBlock` on success and the same block in case of error.
-	fn try_seal(&self, block: LockedBlock, seal: Vec<Bytes>) -> Result<SealedBlock, LockedBlock>;
-
 	/// Makes a non-persistent transaction call.
-	fn call(&self, t: &SignedTransaction) -> Result<Executed, ExecutionError>;
+	// TODO: should be able to accept blockchain location for call.
+	fn call(&self, t: &SignedTransaction, vm_tracing: bool) -> Result<Executed, ExecutionError>;
 
 	/// Returns EvmFactory.
 	fn vm_factory(&self) -> &EvmFactory;
@@ -183,5 +177,20 @@ pub trait BlockChainClient : Sync + Send {
 
 	/// Get last hashes starting from best block.
 	fn last_hashes(&self) -> LastHashes;
+
+	/// import transactions from network/other 3rd party
+	fn import_transactions(&self, transactions: Vec<SignedTransaction>) -> Vec<Result<TransactionImportResult, EthError>>;
+
+	/// list all transactions
+	fn all_transactions(&self) -> Vec<SignedTransaction>;
 }
 
+/// Extended client interface used for mining
+pub trait MiningBlockChainClient : BlockChainClient {
+	/// Attempts to seal given block. Returns `SealedBlock` on success and the same block in case of error.
+	fn try_seal(&self, block: LockedBlock, seal: Vec<Bytes>) -> Result<SealedBlock, LockedBlock>;
+
+	/// Returns ClosedBlock prepared for sealing.
+	fn prepare_sealing(&self, author: Address, gas_floor_target: U256, extra_data: Bytes, transactions: Vec<SignedTransaction>)
+		-> (Option<ClosedBlock>, HashSet<H256>);
+}

ethcore/src/client/test_client.rs

@@ -20,7 +20,7 @@ use std::sync::atomic::{AtomicUsize, Ordering as AtomicOrder};
 use util::*;
 use transaction::{Transaction, LocalizedTransaction, SignedTransaction, Action};
 use blockchain::TreeRoute;
-use client::{BlockChainClient, BlockChainInfo, BlockStatus, BlockID, TransactionID, UncleID, TraceId, TraceFilter, LastHashes};
+use client::{BlockChainClient, MiningBlockChainClient, BlockChainInfo, BlockStatus, BlockID, TransactionID, UncleID, TraceId, TraceFilter, LastHashes};
 use header::{Header as BlockHeader, BlockNumber};
 use filter::Filter;
 use log_entry::LocalizedLogEntry;
@@ -28,6 +28,7 @@ use receipt::{Receipt, LocalizedReceipt};
 use blockchain::extras::BlockReceipts;
 use error::{ImportResult};
 use evm::Factory as EvmFactory;
+use miner::{Miner, MinerService};
 
 use block_queue::BlockQueueInfo;
 use block::{SealedBlock, ClosedBlock, LockedBlock};
@@ -35,6 +36,9 @@ use executive::Executed;
 use error::{ExecutionError};
 use trace::LocalizedTrace;
 
+use miner::{TransactionImportResult, AccountDetails};
+use error::Error as EthError;
+
 /// Test client.
 pub struct TestBlockChainClient {
 	/// Blocks.
@@ -61,6 +65,8 @@ pub struct TestBlockChainClient {
 	pub receipts: RwLock<HashMap<TransactionID, LocalizedReceipt>>,
 	/// Block queue size.
 	pub queue_size: AtomicUsize,
+	/// Miner
+	pub miner: Arc<Miner>,
 }
 
 #[derive(Clone)]
@@ -99,6 +105,7 @@ impl TestBlockChainClient {
 			execution_result: RwLock::new(None),
 			receipts: RwLock::new(HashMap::new()),
 			queue_size: AtomicUsize::new(0),
+			miner: Arc::new(Miner::default()),
 		};
 		client.add_blocks(1, EachBlockWith::Nothing); // add genesis block
 		client.genesis_hash = client.last_hash.read().unwrap().clone();
@@ -232,8 +239,19 @@ impl TestBlockChainClient {
 	}
 }
 
+impl MiningBlockChainClient for TestBlockChainClient {
+	fn try_seal(&self, block: LockedBlock, _seal: Vec<Bytes>) -> Result<SealedBlock, LockedBlock> {
+		Err(block)
+	}
+
+
+	fn prepare_sealing(&self, _author: Address, _gas_floor_target: U256, _extra_data: Bytes, _transactions: Vec<SignedTransaction>) -> (Option<ClosedBlock>, HashSet<H256>) {
+		(None, HashSet::new())
+	}
+}
+
 impl BlockChainClient for TestBlockChainClient {
-	fn call(&self, _t: &SignedTransaction) -> Result<Executed, ExecutionError> {
+	fn call(&self, _t: &SignedTransaction, _vm_tracing: bool) -> Result<Executed, ExecutionError> {
 		Ok(self.execution_result.read().unwrap().clone().unwrap())
 	}
 
@@ -296,14 +314,6 @@ impl BlockChainClient for TestBlockChainClient {
 		unimplemented!();
 	}
 
-	fn prepare_sealing(&self, _author: Address, _gas_floor_target: U256, _extra_data: Bytes, _transactions: Vec<SignedTransaction>) -> (Option<ClosedBlock>, HashSet<H256>) {
-		(None, HashSet::new())
-	}
-
-	fn try_seal(&self, block: LockedBlock, _seal: Vec<Bytes>) -> Result<SealedBlock, LockedBlock> {
-		Err(block)
-	}
-
 	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()))
 	}
@@ -476,4 +486,19 @@ impl BlockChainClient for TestBlockChainClient {
 	fn block_traces(&self, _trace: BlockID) -> Option<Vec<LocalizedTrace>> {
 		unimplemented!();
 	}
+
+	fn import_transactions(&self, transactions: Vec<SignedTransaction>) -> Vec<Result<TransactionImportResult, EthError>> {
+		let nonces = self.nonces.read().unwrap();
+		let balances = self.balances.read().unwrap();
+		let fetch_account = |a: &Address| AccountDetails {
+			nonce: nonces[a],
+			balance: balances[a],
+		};
+
+		self.miner.import_transactions(transactions, &fetch_account)
+	}
+
+	fn all_transactions(&self) -> Vec<SignedTransaction> {
+		self.miner.all_transactions()
+	}
 }

ethcore/src/evm/ext.rs

@@ -105,4 +105,10 @@ pub trait Ext {
 
 	/// Increments sstore refunds count by 1.
 	fn inc_sstore_clears(&mut self);
+
+	/// Prepare to trace an operation. Passthrough for the VM trace.
+	fn trace_prepare_execute(&mut self, _pc: usize, _instruction: u8, _gas_cost: &U256) -> bool { false }
+
+	/// Trace the finalised execution of a single instruction.
+	fn trace_executed(&mut self, _gas_used: U256, _stack_push: &[U256], _mem_diff: Option<(usize, &[u8])>, _store_diff: Option<(U256, U256)>) {}
 }

ethcore/src/evm/instructions.rs

@@ -124,6 +124,7 @@ pub struct InstructionInfo {
 	pub side_effects: bool,
 	pub tier: GasPriceTier
 }
+
 impl InstructionInfo {
 	pub fn new(name: &'static str, additional: usize, args: usize, ret: usize, side_effects: bool, tier: GasPriceTier) -> InstructionInfo {
 		InstructionInfo {
@@ -139,7 +140,7 @@ impl InstructionInfo {
 
 #[cfg_attr(rustfmt, rustfmt_skip)]
 /// Return details about specific instruction
-pub fn get_info (instruction: Instruction) -> InstructionInfo {
+pub fn get_info(instruction: Instruction) -> InstructionInfo {
 	match instruction {
 		STOP => 		InstructionInfo::new("STOP",			0, 0, 0, true, GasPriceTier::Zero),
 		ADD => 			InstructionInfo::new("ADD",				0, 2, 1, false, GasPriceTier::VeryLow),

ethcore/src/evm/interpreter.rs

@@ -17,8 +17,9 @@
 ///! Rust VM implementation
 
 use common::*;
+use trace::VMTracer;
 use super::instructions as instructions;
-use super::instructions::Instruction;
+use super::instructions::{Instruction, get_info};
 use std::marker::Copy;
 use evm::{self, MessageCallResult, ContractCreateResult};
 
@@ -69,6 +70,8 @@ trait Stack<T> {
 	fn push(&mut self, elem: T);
 	/// Get number of elements on Stack
 	fn size(&self) -> usize;
+	/// Returns all data on stack.
+	fn peek_top(&mut self, no_of_elems: usize) -> &[T];
 }
 
 struct VecStack<S> {
@@ -131,6 +134,11 @@ impl<S : fmt::Display> Stack<S> for VecStack<S> {
 	fn size(&self) -> usize {
 		self.stack.len()
 	}
+
+	fn peek_top(&mut self, no_from_top: usize) -> &[S] {
+		assert!(self.stack.len() >= no_from_top, "peek_top asked for more items than exist.");
+		&self.stack[self.stack.len() - no_from_top .. self.stack.len()]
+	}
 }
 
 trait Memory {
@@ -293,10 +301,15 @@ impl evm::Evm for Interpreter {
 
 		while reader.position < code.len() {
 			let instruction = code[reader.position];
-			reader.position += 1;
 
 			// Calculate gas cost
 			let (gas_cost, mem_size) = try!(self.get_gas_cost_mem(ext, instruction, &mut mem, &stack));
+
+			// TODO: make compile-time removable if too much of a performance hit.
+			let trace_executed = ext.trace_prepare_execute(reader.position, instruction, &gas_cost);
+
+			reader.position += 1;
+
 			try!(self.verify_gas(&current_gas, &gas_cost));
 			mem.expand(mem_size);
 			current_gas = current_gas - gas_cost; //TODO: use operator -=
@@ -311,10 +324,19 @@ impl evm::Evm for Interpreter {
 				);
 			});
 
+			let (mem_written, store_written) = match trace_executed {
+				true => (Self::mem_written(instruction, &stack), Self::store_written(instruction, &stack)),
+				false => (None, None),
+			};
+
 			// Execute instruction
 			let result = try!(self.exec_instruction(
 					current_gas, &params, ext, instruction, &mut reader, &mut mem, &mut stack
-					));
+			));
+
+			if trace_executed {
+				ext.trace_executed(current_gas, stack.peek_top(get_info(instruction).ret), mem_written.map(|(o, s)| (o, &(mem[o..(o + s)]))), store_written);
+			}
 
 			// Advance
 			match result {
@@ -485,6 +507,31 @@ impl Interpreter {
 		}
 	}
 
+	fn mem_written(
+		instruction: Instruction,
+		stack: &Stack<U256>
+	) -> Option<(usize, usize)> {
+		match instruction {
+			instructions::MSTORE | instructions::MLOAD => Some((stack.peek(0).low_u64() as usize, 32)),
+			instructions::MSTORE8 => Some((stack.peek(0).low_u64() as usize, 1)),
+			instructions::CALLDATACOPY | instructions::CODECOPY => Some((stack.peek(0).low_u64() as usize, stack.peek(2).low_u64() as usize)),
+			instructions::EXTCODECOPY => Some((stack.peek(1).low_u64() as usize, stack.peek(3).low_u64() as usize)),
+			instructions::CALL | instructions::CALLCODE => Some((stack.peek(5).low_u64() as usize, stack.peek(6).low_u64() as usize)),
+			instructions::DELEGATECALL => Some((stack.peek(4).low_u64() as usize, stack.peek(5).low_u64() as usize)),
+			_ => None,
+		}
+	}
+
+	fn store_written(
+		instruction: Instruction,
+		stack: &Stack<U256>
+	) -> Option<(U256, U256)> {
+		match instruction {
+			instructions::SSTORE => Some((stack.peek(0).clone(), stack.peek(1).clone())),
+			_ => None,
+		}
+	}
+
 	fn mem_gas_cost(&self, schedule: &evm::Schedule, current_mem_size: usize, mem_size: &U256) -> Result<(U256, usize), evm::Error> {
 		let gas_for_mem = |mem_size: U256| {
 			let s = mem_size >> 5;
@@ -833,10 +880,12 @@ impl Interpreter {
 		}
 	}
 
-	fn verify_instructions_requirements(&self,
+	fn verify_instructions_requirements(
-										info: &instructions::InstructionInfo,
+		&self,
-										stack_limit: usize,
+		info: &instructions::InstructionInfo,
-										stack: &Stack<U256>) -> Result<(), evm::Error> {
+		stack_limit: usize,
+		stack: &Stack<U256>
+	) -> Result<(), evm::Error> {
 		if !stack.has(info.args) {
 			Err(evm::Error::StackUnderflow {
 				instruction: info.name,

ethcore/src/evm/jit.rs

@@ -16,6 +16,7 @@
 
 //! Just in time compiler execution environment.
 use common::*;
+use trace::VMTracer;
 use evmjit;
 use evm;
 

ethcore/src/evm/mod.rs

@@ -33,3 +33,4 @@ pub use self::evm::{Evm, Error, Result};
 pub use self::ext::{Ext, ContractCreateResult, MessageCallResult};
 pub use self::factory::{Factory, VMType};
 pub use self::schedule::Schedule;
+pub use self::instructions::get_info;

ethcore/src/executive.rs

@@ -21,9 +21,8 @@ use engine::*;
 use evm::{self, Ext, Factory};
 use externalities::*;
 use substate::*;
-use trace::{Trace, Tracer, NoopTracer, ExecutiveTracer};
+use trace::{Trace, Tracer, NoopTracer, ExecutiveTracer, VMTrace, VMTracer, ExecutiveVMTracer, NoopVMTracer};
 use crossbeam;
-
 pub use types::executed::{Executed, ExecutionResult};
 
 /// Max depth to avoid stack overflow (when it's reached we start a new thread with VM)
@@ -43,6 +42,8 @@ pub fn contract_address(address: &Address, nonce: &U256) -> Address {
 pub struct TransactOptions {
 	/// Enable call tracing.
 	pub tracing: bool,
+	/// Enable VM tracing.
+	pub vm_tracing: bool,
 	/// Check transaction nonce before execution.
 	pub check_nonce: bool,
 }
@@ -80,21 +81,40 @@ impl<'a> Executive<'a> {
 	}
 
 	/// Creates `Externalities` from `Executive`.
-	pub fn as_externalities<'_, T>(&'_ mut self, origin_info: OriginInfo, substate: &'_ mut Substate, output: OutputPolicy<'_, '_>, tracer: &'_ mut T) -> Externalities<'_, T> where T: Tracer {
+	pub fn as_externalities<'_, T, V>(
-		Externalities::new(self.state, self.info, self.engine, self.vm_factory, self.depth, origin_info, substate, output, tracer)
+		&'_ mut self,
+		origin_info: OriginInfo,
+		substate: &'_ mut Substate,
+		output: OutputPolicy<'_, '_>,
+		tracer: &'_ mut T,
+		vm_tracer: &'_ mut V
+	) -> Externalities<'_, T, V> where T: Tracer, V: VMTracer {
+		Externalities::new(self.state, self.info, self.engine, self.vm_factory, self.depth, origin_info, substate, output, tracer, vm_tracer)
 	}
 
 	/// This function should be used to execute transaction.
 	pub fn transact(&'a mut self, t: &SignedTransaction, options: TransactOptions) -> Result<Executed, ExecutionError> {
 		let check = options.check_nonce;
 		match options.tracing {
-			true => self.transact_with_tracer(t, check, ExecutiveTracer::default()),
+			true => match options.vm_tracing {
-			false => self.transact_with_tracer(t, check, NoopTracer),
+				true => self.transact_with_tracer(t, check, ExecutiveTracer::default(), ExecutiveVMTracer::default()),
+				false => self.transact_with_tracer(t, check, ExecutiveTracer::default(), NoopVMTracer),
+			},
+			false => match options.vm_tracing {
+				true => self.transact_with_tracer(t, check, NoopTracer, ExecutiveVMTracer::default()),
+				false => self.transact_with_tracer(t, check, NoopTracer, NoopVMTracer),
+			},
 		}
 	}
 
 	/// Execute transaction/call with tracing enabled
-	pub fn transact_with_tracer<T>(&'a mut self, t: &SignedTransaction, check_nonce: bool, mut tracer: T) -> Result<Executed, ExecutionError> where T: Tracer {
+	pub fn transact_with_tracer<T, V>(
+		&'a mut self,
+		t: &SignedTransaction,
+		check_nonce: bool,
+		mut tracer: T,
+		mut vm_tracer: V
+	) -> Result<Executed, ExecutionError> where T: Tracer, V: VMTracer {
 		let sender = try!(t.sender().map_err(|e| {
 			let message = format!("Transaction malformed: {:?}", e);
 			ExecutionError::TransactionMalformed(message)
@@ -154,7 +174,7 @@ impl<'a> Executive<'a> {
 					code: Some(t.data.clone()),
 					data: None,
 				};
-				(self.create(params, &mut substate, &mut tracer), vec![])
+				(self.create(params, &mut substate, &mut tracer, &mut vm_tracer), vec![])
 			},
 			Action::Call(ref address) => {
 				let params = ActionParams {
@@ -170,20 +190,26 @@ impl<'a> Executive<'a> {
 				};
 				// TODO: move output upstream
 				let mut out = vec![];
-				(self.call(params, &mut substate, BytesRef::Flexible(&mut out), &mut tracer), out)
+				(self.call(params, &mut substate, BytesRef::Flexible(&mut out), &mut tracer, &mut vm_tracer), out)
 			}
 		};
 
 		// finalize here!
-		Ok(try!(self.finalize(t, substate, gas_left, output, tracer.traces().pop())))
+		Ok(try!(self.finalize(t, substate, gas_left, output, tracer.traces().pop(), vm_tracer.drain())))
 	}
 
-	fn exec_vm<T>(&mut self, params: ActionParams, unconfirmed_substate: &mut Substate, output_policy: OutputPolicy, tracer: &mut T)
+	fn exec_vm<T, V>(
-		-> evm::Result where T: Tracer {
+		&mut self,
+		params: ActionParams,
+		unconfirmed_substate: &mut Substate,
+		output_policy: OutputPolicy,
+		tracer: &mut T,
+		vm_tracer: &mut V
+	) -> evm::Result where T: Tracer, V: VMTracer {
 		// Ordinary execution - keep VM in same thread
 		if (self.depth + 1) % MAX_VM_DEPTH_FOR_THREAD != 0 {
 			let vm_factory = self.vm_factory;
-			let mut ext = self.as_externalities(OriginInfo::from(&params), unconfirmed_substate, output_policy, tracer);
+			let mut ext = self.as_externalities(OriginInfo::from(&params), unconfirmed_substate, output_policy, tracer, vm_tracer);
 			trace!(target: "executive", "ext.schedule.have_delegate_call: {}", ext.schedule().have_delegate_call);
 			return vm_factory.create().exec(params, &mut ext);
 		}
@@ -193,7 +219,7 @@ impl<'a> Executive<'a> {
 		// https://github.com/aturon/crossbeam/issues/16
 		crossbeam::scope(|scope| {
 			let vm_factory = self.vm_factory;
-			let mut ext = self.as_externalities(OriginInfo::from(&params), unconfirmed_substate, output_policy, tracer);
+			let mut ext = self.as_externalities(OriginInfo::from(&params), unconfirmed_substate, output_policy, tracer, vm_tracer);
 
 			scope.spawn(move || {
 				vm_factory.create().exec(params, &mut ext)
@@ -205,8 +231,14 @@ impl<'a> Executive<'a> {
 	/// NOTE. It does not finalize the transaction (doesn't do refunds, nor suicides).
 	/// Modifies the substate and the output.
 	/// Returns either gas_left or `evm::Error`.
-	pub fn call<T>(&mut self, params: ActionParams, substate: &mut Substate, mut output: BytesRef, tracer: &mut T)
+	pub fn call<T, V>(
-		-> evm::Result where T: Tracer {
+		&mut self,
+		params: ActionParams,
+		substate: &mut Substate,
+		mut output: BytesRef,
+		tracer: &mut T,
+		vm_tracer: &mut V
+	) -> evm::Result where T: Tracer, V: VMTracer {
 		// backup used in case of running out of gas
 		self.state.snapshot();
 
@@ -264,16 +296,22 @@ impl<'a> Executive<'a> {
 			let trace_info = tracer.prepare_trace_call(&params);
 			let mut trace_output = tracer.prepare_trace_output();
 			let mut subtracer = tracer.subtracer();
+
 			let gas = params.gas;
 
 			if params.code.is_some() {
 				// part of substate that may be reverted
 				let mut unconfirmed_substate = Substate::new();
 
+				// TODO: make ActionParams pass by ref then avoid copy altogether.
+				let mut subvmtracer = vm_tracer.prepare_subtrace(params.code.as_ref().expect("scope is protected by params.code.is_some condition"));
+
 				let res = {
-					self.exec_vm(params, &mut unconfirmed_substate, OutputPolicy::Return(output, trace_output.as_mut()), &mut subtracer)
+					self.exec_vm(params, &mut unconfirmed_substate, OutputPolicy::Return(output, trace_output.as_mut()), &mut subtracer, &mut subvmtracer)
 				};
 
+				vm_tracer.done_subtrace(subvmtracer);
+
 				trace!(target: "executive", "res={:?}", res);
 
 				let traces = subtracer.traces();
@@ -307,8 +345,13 @@ impl<'a> Executive<'a> {
 	/// Creates contract with given contract params.
 	/// NOTE. It does not finalize the transaction (doesn't do refunds, nor suicides).
 	/// Modifies the substate.
-	pub fn create<T>(&mut self, params: ActionParams, substate: &mut Substate, tracer: &mut T) -> evm::Result where T:
+	pub fn create<T, V>(
-		Tracer {
+		&mut self,
+		params: ActionParams,
+		substate: &mut Substate,
+		tracer: &mut T,
+		vm_tracer: &mut V
+	) -> evm::Result where T: Tracer, V: VMTracer {
 		// backup used in case of running out of gas
 		self.state.snapshot();
 
@@ -330,10 +373,14 @@ impl<'a> Executive<'a> {
 		let gas = params.gas;
 		let created = params.address.clone();
 
+		let mut subvmtracer = vm_tracer.prepare_subtrace(&params.code.as_ref().expect("two ways into create (Externalities::create and Executive::transact_with_tracer); both place `Some(...)` `code` in `params`; qed"));
+
 		let res = {
-			self.exec_vm(params, &mut unconfirmed_substate, OutputPolicy::InitContract(trace_output.as_mut()), &mut subtracer)
+			self.exec_vm(params, &mut unconfirmed_substate, OutputPolicy::InitContract(trace_output.as_mut()), &mut subtracer, &mut subvmtracer)
 		};
 
+		vm_tracer.done_subtrace(subvmtracer);
+
 		match res {
 			Ok(gas_left) => tracer.trace_create(
 				trace_info,
@@ -351,7 +398,15 @@ impl<'a> Executive<'a> {
 	}
 
 	/// Finalizes the transaction (does refunds and suicides).
-	fn finalize(&mut self, t: &SignedTransaction, substate: Substate, result: evm::Result, output: Bytes, trace: Option<Trace>) -> ExecutionResult {
+	fn finalize(
+		&mut self,
+		t: &SignedTransaction,
+		substate: Substate,
+		result: evm::Result,
+		output: Bytes,
+		trace: Option<Trace>,
+		vm_trace: Option<VMTrace>
+	) -> ExecutionResult {
 		let schedule = self.engine.schedule(self.info);
 
 		// refunds from SSTORE nonzero -> zero
@@ -394,6 +449,7 @@ impl<'a> Executive<'a> {
 					contracts_created: vec![],
 					output: output,
 					trace: trace,
+					vm_trace: vm_trace,
 				})
 			},
 			_ => {
@@ -406,6 +462,7 @@ impl<'a> Executive<'a> {
 					contracts_created: substate.contracts_created,
 					output: output,
 					trace: trace,
+					vm_trace: vm_trace,
 				})
 			},
 		}
@@ -438,6 +495,7 @@ mod tests {
 	use tests::helpers::*;
 	use trace::trace;
 	use trace::{Trace, Tracer, NoopTracer, ExecutiveTracer};
+	use trace::{VMTrace, VMOperation, VMExecutedOperation, MemoryDiff, StorageDiff, VMTracer, NoopVMTracer, ExecutiveVMTracer};
 
 	#[test]
 	fn test_contract_address() {
@@ -466,7 +524,7 @@ mod tests {
 
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.create(params, &mut substate, &mut NoopTracer).unwrap()
+			ex.create(params, &mut substate, &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
 
 		assert_eq!(gas_left, U256::from(79_975));
@@ -525,7 +583,7 @@ mod tests {
 
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.create(params, &mut substate, &mut NoopTracer).unwrap()
+			ex.create(params, &mut substate, &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
 
 		assert_eq!(gas_left, U256::from(62_976));
@@ -542,7 +600,7 @@ mod tests {
 		// 52
 		// 60 1d - push 29
 		// 60 03 - push 3
-		// 60 17 - push 17
+		// 60 17 - push 23
 		// f0 - create
 		// 60 00 - push 0
 		// 55 sstore
@@ -578,13 +636,16 @@ mod tests {
 		let engine = TestEngine::new(5);
 		let mut substate = Substate::new();
 		let mut tracer = ExecutiveTracer::default();
+		let mut vm_tracer = ExecutiveVMTracer::default();
 
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
 			let output = BytesRef::Fixed(&mut[0u8;0]);
-			ex.call(params, &mut substate, output, &mut tracer).unwrap()
+			ex.call(params, &mut substate, output, &mut tracer, &mut vm_tracer).unwrap()
 		};
 
+		assert_eq!(gas_left, U256::from(44_752));
+
 		let expected_trace = vec![ Trace {
 			depth: 0,
 			action: trace::Action::Call(trace::Call {
@@ -615,7 +676,39 @@ mod tests {
 			}]
 		}];
 		assert_eq!(tracer.traces(), expected_trace);
-		assert_eq!(gas_left, U256::from(44_752));
+
+		let expected_vm_trace = VMTrace {
+			parent_step: 0,
+			code: vec![124, 96, 16, 128, 96, 12, 96, 0, 57, 96, 0, 243, 0, 96, 0, 53, 84, 21, 96, 9, 87, 0, 91, 96, 32, 53, 96, 0, 53, 85, 96, 0, 82, 96, 29, 96, 3, 96, 23, 240, 96, 0, 85],
+			operations: vec![
+				VMOperation { pc: 0, instruction: 124, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 99997.into(), stack_push: vec_into![U256::from_dec_str("2589892687202724018173567190521546555304938078595079151649957320078677").unwrap()], mem_diff: None, store_diff: None }) }, 
+				VMOperation { pc: 30, instruction: 96, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 99994.into(), stack_push: vec_into![0], mem_diff: None, store_diff: None }) }, 
+				VMOperation { pc: 32, instruction: 82, gas_cost: 6.into(), executed: Some(VMExecutedOperation { gas_used: 99988.into(), stack_push: vec_into![], mem_diff: Some(MemoryDiff { offset: 0, data: vec![0, 0, 0, 96, 16, 128, 96, 12, 96, 0, 57, 96, 0, 243, 0, 96, 0, 53, 84, 21, 96, 9, 87, 0, 91, 96, 32, 53, 96, 0, 53, 85] }), store_diff: None }) }, 
+				VMOperation { pc: 33, instruction: 96, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 99985.into(), stack_push: vec_into![29], mem_diff: None, store_diff: None }) }, 
+				VMOperation { pc: 35, instruction: 96, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 99982.into(), stack_push: vec_into![3], mem_diff: None, store_diff: None }) }, 
+				VMOperation { pc: 37, instruction: 96, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 99979.into(), stack_push: vec_into![23], mem_diff: None, store_diff: None }) }, 
+				VMOperation { pc: 39, instruction: 240, gas_cost: 32000.into(), executed: Some(VMExecutedOperation { gas_used: 67979.into(), stack_push: vec_into![U256::from_dec_str("1135198453258042933984631383966629874710669425204").unwrap()], mem_diff: None, store_diff: None }) }, 
+				VMOperation { pc: 40, instruction: 96, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 64752.into(), stack_push: vec_into![0], mem_diff: None, store_diff: None }) }, 
+				VMOperation { pc: 42, instruction: 85, gas_cost: 20000.into(), executed: Some(VMExecutedOperation { gas_used: 44752.into(), stack_push: vec_into![], mem_diff: None, store_diff: Some(StorageDiff { location: 0.into(), value: U256::from_dec_str("1135198453258042933984631383966629874710669425204").unwrap() }) }) }
+			],
+			subs: vec![
+				VMTrace {
+					parent_step: 7,
+					code: vec![96, 16, 128, 96, 12, 96, 0, 57, 96, 0, 243, 0, 96, 0, 53, 84, 21, 96, 9, 87, 0, 91, 96, 32, 53, 96, 0, 53, 85],
+					operations: vec![
+						VMOperation { pc: 0, instruction: 96, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 67976.into(), stack_push: vec_into![16], mem_diff: None, store_diff: None }) }, 
+						VMOperation { pc: 2, instruction: 128, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 67973.into(), stack_push: vec_into![16, 16], mem_diff: None, store_diff: None }) }, 
+						VMOperation { pc: 3, instruction: 96, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 67970.into(), stack_push: vec_into![12], mem_diff: None, store_diff: None }) }, 
+						VMOperation { pc: 5, instruction: 96, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 67967.into(), stack_push: vec_into![0], mem_diff: None, store_diff: None }) }, 
+						VMOperation { pc: 7, instruction: 57, gas_cost: 9.into(), executed: Some(VMExecutedOperation { gas_used: 67958.into(), stack_push: vec_into![], mem_diff: Some(MemoryDiff { offset: 0, data: vec![96, 0, 53, 84, 21, 96, 9, 87, 0, 91, 96, 32, 53, 96, 0, 53] }), store_diff: None }) }, 
+						VMOperation { pc: 8, instruction: 96, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 67955.into(), stack_push: vec_into![0], mem_diff: None, store_diff: None }) }, 
+						VMOperation { pc: 10, instruction: 243, gas_cost: 0.into(), executed: Some(VMExecutedOperation { gas_used: 67955.into(), stack_push: vec_into![], mem_diff: None, store_diff: None }) }
+					],
+					subs: vec![]
+				}
+			]
+		};
+		assert_eq!(vm_tracer.drain().unwrap(), expected_vm_trace);
 	}
 
 	evm_test!{test_create_contract: test_create_contract_jit, test_create_contract_int}
@@ -650,12 +743,15 @@ mod tests {
 		let engine = TestEngine::new(5);
 		let mut substate = Substate::new();
 		let mut tracer = ExecutiveTracer::default();
+		let mut vm_tracer = ExecutiveVMTracer::default();
 
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.create(params.clone(), &mut substate, &mut tracer).unwrap()
+			ex.create(params.clone(), &mut substate, &mut tracer, &mut vm_tracer).unwrap()
 		};
 
+		assert_eq!(gas_left, U256::from(96_776));
+
 		let expected_trace = vec![Trace {
 			depth: 0,
 			action: trace::Action::Create(trace::Create {
@@ -671,9 +767,23 @@ mod tests {
 			}),
 			subs: vec![]
 		}];
-
 		assert_eq!(tracer.traces(), expected_trace);
-		assert_eq!(gas_left, U256::from(96_776));
+		
+		let expected_vm_trace = VMTrace {
+			parent_step: 0,
+			code: vec![96, 16, 128, 96, 12, 96, 0, 57, 96, 0, 243, 0, 96, 0, 53, 84, 21, 96, 9, 87, 0, 91, 96, 32, 53, 96, 0, 53, 85],
+			operations: vec![
+				VMOperation { pc: 0, instruction: 96, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 99997.into(), stack_push: vec_into![16], mem_diff: None, store_diff: None }) },
+				VMOperation { pc: 2, instruction: 128, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 99994.into(), stack_push: vec_into![16, 16], mem_diff: None, store_diff: None }) },
+				VMOperation { pc: 3, instruction: 96, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 99991.into(), stack_push: vec_into![12], mem_diff: None, store_diff: None }) },
+				VMOperation { pc: 5, instruction: 96, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 99988.into(), stack_push: vec_into![0], mem_diff: None, store_diff: None }) },
+				VMOperation { pc: 7, instruction: 57, gas_cost: 9.into(), executed: Some(VMExecutedOperation { gas_used: 99979.into(), stack_push: vec_into![], mem_diff: Some(MemoryDiff { offset: 0, data: vec![96, 0, 53, 84, 21, 96, 9, 87, 0, 91, 96, 32, 53, 96, 0, 53] }), store_diff: None }) },
+				VMOperation { pc: 8, instruction: 96, gas_cost: 3.into(), executed: Some(VMExecutedOperation { gas_used: 99976.into(), stack_push: vec_into![0], mem_diff: None, store_diff: None }) },
+				VMOperation { pc: 10, instruction: 243, gas_cost: 0.into(), executed: Some(VMExecutedOperation { gas_used: 99976.into(), stack_push: vec_into![], mem_diff: None, store_diff: None }) }
+			],
+			subs: vec![]
+		};
+		assert_eq!(vm_tracer.drain().unwrap(), expected_vm_trace);
 	}
 
 	evm_test!{test_create_contract_value_too_high: test_create_contract_value_too_high_jit, test_create_contract_value_too_high_int}
@@ -722,7 +832,7 @@ mod tests {
 
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.create(params, &mut substate, &mut NoopTracer).unwrap()
+			ex.create(params, &mut substate, &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
 
 		assert_eq!(gas_left, U256::from(62_976));
@@ -774,7 +884,7 @@ mod tests {
 
 		{
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.create(params, &mut substate, &mut NoopTracer).unwrap();
+			ex.create(params, &mut substate, &mut NoopTracer, &mut NoopVMTracer).unwrap();
 		}
 
 		assert_eq!(substate.contracts_created.len(), 1);
@@ -835,7 +945,7 @@ mod tests {
 
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.call(params, &mut substate, BytesRef::Fixed(&mut []), &mut NoopTracer).unwrap()
+			ex.call(params, &mut substate, BytesRef::Fixed(&mut []), &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
 
 		assert_eq!(gas_left, U256::from(73_237));
@@ -880,7 +990,7 @@ mod tests {
 
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.call(params, &mut substate, BytesRef::Fixed(&mut []), &mut NoopTracer).unwrap()
+			ex.call(params, &mut substate, BytesRef::Fixed(&mut []), &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
 
 		assert_eq!(gas_left, U256::from(59_870));
@@ -913,7 +1023,7 @@ mod tests {
 
 		let executed = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			let opts = TransactOptions { check_nonce: true, tracing: false };
+			let opts = TransactOptions { check_nonce: true, tracing: false, vm_tracing: false };
 			ex.transact(&t, opts).unwrap()
 		};
 
@@ -947,7 +1057,7 @@ mod tests {
 
 		let res = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			let opts = TransactOptions { check_nonce: true, tracing: false };
+			let opts = TransactOptions { check_nonce: true, tracing: false, vm_tracing: false };
 			ex.transact(&t, opts)
 		};
 
@@ -979,7 +1089,7 @@ mod tests {
 
 		let res = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			let opts = TransactOptions { check_nonce: true, tracing: false };
+			let opts = TransactOptions { check_nonce: true, tracing: false, vm_tracing: false };
 			ex.transact(&t, opts)
 		};
 
@@ -1013,7 +1123,7 @@ mod tests {
 
 		let res = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			let opts = TransactOptions { check_nonce: true, tracing: false };
+			let opts = TransactOptions { check_nonce: true, tracing: false, vm_tracing: false };
 			ex.transact(&t, opts)
 		};
 
@@ -1047,7 +1157,7 @@ mod tests {
 
 		let res = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			let opts = TransactOptions { check_nonce: true, tracing: false };
+			let opts = TransactOptions { check_nonce: true, tracing: false, vm_tracing: false };
 			ex.transact(&t, opts)
 		};
 
@@ -1082,7 +1192,7 @@ mod tests {
 
 		let result = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.create(params, &mut substate, &mut NoopTracer)
+			ex.create(params, &mut substate, &mut NoopTracer, &mut NoopVMTracer)
 		};
 
 		match result {

ethcore/src/externalities.rs

@@ -21,7 +21,7 @@ use engine::*;
 use executive::*;
 use evm::{self, Schedule, Ext, ContractCreateResult, MessageCallResult, Factory};
 use substate::*;
-use trace::Tracer;
+use trace::{Tracer, VMTracer};
 
 /// Policy for handling output data on `RETURN` opcode.
 pub enum OutputPolicy<'a, 'b> {
@@ -55,7 +55,7 @@ impl OriginInfo {
 }
 
 /// Implementation of evm Externalities.
-pub struct Externalities<'a, T> where T: 'a + Tracer {
+pub struct Externalities<'a, T, V> where T: 'a + Tracer, V: 'a + VMTracer {
 	state: &'a mut State,
 	env_info: &'a EnvInfo,
 	engine: &'a Engine,
@@ -66,10 +66,10 @@ pub struct Externalities<'a, T> where T: 'a + Tracer {
 	schedule: Schedule,
 	output: OutputPolicy<'a, 'a>,
 	tracer: &'a mut T,
+	vm_tracer: &'a mut V,
 }
 
-impl<'a, T> Externalities<'a, T> where T: 'a + Tracer {
+impl<'a, T, V> Externalities<'a, T, V> where T: 'a + Tracer, V: 'a + VMTracer {
-
 	#[cfg_attr(feature="dev", allow(too_many_arguments))]
 	/// Basic `Externalities` constructor.
 	pub fn new(state: &'a mut State,
@@ -81,6 +81,7 @@ impl<'a, T> Externalities<'a, T> where T: 'a + Tracer {
 		substate: &'a mut Substate,
 		output: OutputPolicy<'a, 'a>,
 		tracer: &'a mut T,
+		vm_tracer: &'a mut V,
 	) -> Self {
 		Externalities {
 			state: state,
@@ -93,11 +94,12 @@ impl<'a, T> Externalities<'a, T> where T: 'a + Tracer {
 			schedule: engine.schedule(env_info),
 			output: output,
 			tracer: tracer,
+			vm_tracer: vm_tracer,
 		}
 	}
 }
 
-impl<'a, T> Ext for Externalities<'a, T> where T: 'a + Tracer {
+impl<'a, T, V> Ext for Externalities<'a, T, V> where T: 'a + Tracer, V: 'a + VMTracer {
 	fn storage_at(&self, key: &H256) -> H256 {
 		self.state.storage_at(&self.origin_info.address, key)
 	}
@@ -152,7 +154,7 @@ impl<'a, T> Ext for Externalities<'a, T> where T: 'a + Tracer {
 		let mut ex = Executive::from_parent(self.state, self.env_info, self.engine, self.vm_factory, self.depth);
 
 		// TODO: handle internal error separately
-		match ex.create(params, self.substate, self.tracer) {
+		match ex.create(params, self.substate, self.tracer, self.vm_tracer) {
 			Ok(gas_left) => {
 				self.substate.contracts_created.push(address.clone());
 				ContractCreateResult::Created(address, gas_left)
@@ -190,7 +192,7 @@ impl<'a, T> Ext for Externalities<'a, T> where T: 'a + Tracer {
 
 		let mut ex = Executive::from_parent(self.state, self.env_info, self.engine, self.vm_factory, self.depth);
 
-		match ex.call(params, self.substate, BytesRef::Fixed(output), self.tracer) {
+		match ex.call(params, self.substate, BytesRef::Fixed(output), self.tracer, self.vm_tracer) {
 			Ok(gas_left) => MessageCallResult::Success(gas_left),
 			_ => MessageCallResult::Failed
 		}
@@ -286,6 +288,14 @@ impl<'a, T> Ext for Externalities<'a, T> where T: 'a + Tracer {
 	fn inc_sstore_clears(&mut self) {
 		self.substate.sstore_clears_count = self.substate.sstore_clears_count + U256::one();
 	}
+
+	fn trace_prepare_execute(&mut self, pc: usize, instruction: u8, gas_cost: &U256) -> bool {
+		self.vm_tracer.trace_prepare_execute(pc, instruction, gas_cost)
+	}
+
+	fn trace_executed(&mut self, gas_used: U256, stack_push: &[U256], mem_diff: Option<(usize, &[u8])>, store_diff: Option<(U256, U256)>) {
+		self.vm_tracer.trace_executed(gas_used, stack_push, mem_diff, store_diff)
+	}
 }
 
 #[cfg(test)]
@@ -297,7 +307,7 @@ mod tests {
 	use substate::*;
 	use tests::helpers::*;
 	use super::*;
-	use trace::{NoopTracer};
+	use trace::{NoopTracer, NoopVMTracer};
 
 	fn get_test_origin() -> OriginInfo {
 		OriginInfo {
@@ -349,9 +359,10 @@ mod tests {
 		let mut setup = TestSetup::new();
 		let state = setup.state.reference_mut();
 		let mut tracer = NoopTracer;
+		let mut vm_tracer = NoopVMTracer;
 
 		let vm_factory = Default::default();
-		let ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer);
+		let ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer, &mut vm_tracer);
 
 		assert_eq!(ext.env_info().number, 100);
 	}
@@ -361,9 +372,10 @@ mod tests {
 		let mut setup = TestSetup::new();
 		let state = setup.state.reference_mut();
 		let mut tracer = NoopTracer;
+		let mut vm_tracer = NoopVMTracer;
 
 		let vm_factory = Default::default();
-		let ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer);
+		let ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer, &mut vm_tracer);
 
 		let hash = ext.blockhash(&U256::from_str("0000000000000000000000000000000000000000000000000000000000120000").unwrap());
 
@@ -383,9 +395,10 @@ mod tests {
 		}
 		let state = setup.state.reference_mut();
 		let mut tracer = NoopTracer;
+		let mut vm_tracer = NoopVMTracer;
 
 		let vm_factory = Default::default();
-		let ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer);
+		let ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer, &mut vm_tracer);
 
 		let hash = ext.blockhash(&U256::from_str("0000000000000000000000000000000000000000000000000000000000120000").unwrap());
 
@@ -398,9 +411,10 @@ mod tests {
 		let mut setup = TestSetup::new();
 		let state = setup.state.reference_mut();
 		let mut tracer = NoopTracer;
+		let mut vm_tracer = NoopVMTracer;
 
 		let vm_factory = Default::default();
-		let mut ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer);
+		let mut ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer, &mut vm_tracer);
 
 		let mut output = vec![];
 
@@ -423,10 +437,11 @@ mod tests {
 		let mut setup = TestSetup::new();
 		let state = setup.state.reference_mut();
 		let mut tracer = NoopTracer;
+		let mut vm_tracer = NoopVMTracer;
 
 		{
 			let vm_factory = Default::default();
-			let mut ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer);
+			let mut ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer, &mut vm_tracer);
 			ext.log(log_topics, &log_data);
 		}
 
@@ -440,10 +455,11 @@ mod tests {
 		let mut setup = TestSetup::new();
 		let state = setup.state.reference_mut();
 		let mut tracer = NoopTracer;
+		let mut vm_tracer = NoopVMTracer;
 
 		{
 			let vm_factory = Default::default();
-			let mut ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer);
+			let mut ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer, &mut vm_tracer);
 			ext.suicide(&refund_account);
 		}
 

ethcore/src/json_tests/chain.rs

@@ -22,6 +22,7 @@ use tests::helpers::*;
 use devtools::*;
 use spec::Genesis;
 use ethjson;
+use miner::Miner;
 
 pub fn json_chain_test(json_data: &[u8], era: ChainEra) -> Vec<String> {
 	init_log();
@@ -53,7 +54,7 @@ pub fn json_chain_test(json_data: &[u8], era: ChainEra) -> Vec<String> {
 
 			let temp = RandomTempPath::new();
 			{
-				let client = Client::new(ClientConfig::default(), spec, temp.as_path(), IoChannel::disconnected()).unwrap();
+				let client = Client::new(ClientConfig::default(), spec, temp.as_path(), Arc::new(Miner::default()), IoChannel::disconnected()).unwrap();
 				for b in &blockchain.blocks_rlp() {
 					if Block::is_good(&b) {
 						let _ = client.import_block(b.clone());

ethcore/src/json_tests/executive.rs

@@ -25,6 +25,7 @@ use substate::*;
 use tests::helpers::*;
 use ethjson;
 use trace::{Tracer, NoopTracer};
+use trace::{VMTracer, NoopVMTracer};
 
 #[derive(Debug, PartialEq)]
 struct CallCreate {
@@ -48,32 +49,35 @@ impl From<ethjson::vm::Call> for CallCreate {
 
 /// Tiny wrapper around executive externalities.
 /// Stores callcreates.
-struct TestExt<'a, T> where T: 'a + Tracer {
+struct TestExt<'a, T, V> where T: 'a + Tracer, V: 'a + VMTracer {
-	ext: Externalities<'a, T>,
+	ext: Externalities<'a, T, V>,
 	callcreates: Vec<CallCreate>,
 	contract_address: Address
 }
 
-impl<'a, T> TestExt<'a, T> where T: 'a + Tracer {
+impl<'a, T, V> TestExt<'a, T, V> where T: 'a + Tracer, V: 'a + VMTracer {
-	fn new(state: &'a mut State,
+	fn new(
-			   info: &'a EnvInfo,
+		state: &'a mut State,
-			   engine: &'a Engine,
+		info: &'a EnvInfo,
-			   vm_factory: &'a Factory,
+		engine: &'a Engine,
-			   depth: usize,
+		vm_factory: &'a Factory,
-			   origin_info: OriginInfo,
+		depth: usize,
-			   substate: &'a mut Substate,
+		origin_info: OriginInfo,
-			   output: OutputPolicy<'a, 'a>,
+		substate: &'a mut Substate,
-			   address: Address,
+		output: OutputPolicy<'a, 'a>,
-			   tracer: &'a mut T) -> Self {
+		address: Address,
+		tracer: &'a mut T,
+		vm_tracer: &'a mut V,
+	) -> Self {
 		TestExt {
 			contract_address: contract_address(&address, &state.nonce(&address)),
-			ext: Externalities::new(state, info, engine, vm_factory, depth, origin_info, substate, output, tracer),
+			ext: Externalities::new(state, info, engine, vm_factory, depth, origin_info, substate, output, tracer, vm_tracer),
 			callcreates: vec![]
 		}
 	}
 }
 
-impl<'a, T> Ext for TestExt<'a, T> where T: Tracer {
+impl<'a, T, V> Ext for TestExt<'a, T, V> where T: Tracer, V: VMTracer {
 	fn storage_at(&self, key: &H256) -> H256 {
 		self.ext.storage_at(key)
 	}
@@ -186,6 +190,7 @@ fn do_json_test_for(vm_type: &VMType, json_data: &[u8]) -> Vec<String> {
 
 		let mut substate = Substate::new();
 		let mut tracer = NoopTracer;
+		let mut vm_tracer = NoopVMTracer;
 		let mut output = vec![];
 
 		// execute
@@ -201,6 +206,7 @@ fn do_json_test_for(vm_type: &VMType, json_data: &[u8]) -> Vec<String> {
 				OutputPolicy::Return(BytesRef::Flexible(&mut output), None),
 				params.address.clone(),
 				&mut tracer,
+				&mut vm_tracer,
 			);
 			let evm = vm_factory.create();
 			let res = evm.exec(params, &mut ex);

ethcore/src/lib.rs

@@ -90,6 +90,7 @@ extern crate crossbeam;
 extern crate ethjson;
 extern crate bloomchain;
 #[macro_use] extern crate ethcore_ipc as ipc;
+extern crate rayon;
 
 #[cfg(test)] extern crate ethcore_devtools as devtools;
 #[cfg(feature = "jit" )] extern crate evmjit;
@@ -109,6 +110,7 @@ pub mod views;
 pub mod pod_state;
 pub mod engine;
 pub mod migrations;
+pub mod miner;
 
 mod blooms;
 mod db;
@@ -139,3 +141,5 @@ mod tests;
 mod json_tests;
 
 pub use types::*;
+pub use evm::get_info;
+pub use executive::contract_address;

ethcore/src/miner/miner.rs

@@ -18,17 +18,17 @@ use rayon::prelude::*;
 use std::sync::atomic::AtomicBool;
 
 use util::*;
-use util::keys::store::AccountProvider;
+use util::keys::store::{AccountProvider};
-use ethcore::views::{BlockView, HeaderView};
+use views::{BlockView, HeaderView};
-use ethcore::client::{BlockChainClient, BlockID};
+use client::{MiningBlockChainClient, BlockID};
-use ethcore::block::{ClosedBlock, IsBlock};
+use block::{ClosedBlock, IsBlock};
-use ethcore::error::*;
+use error::*;
-use ethcore::client::{Executive, Executed, EnvInfo, TransactOptions};
+use client::{Executive, Executed, EnvInfo, TransactOptions};
-use ethcore::transaction::SignedTransaction;
+use transaction::SignedTransaction;
-use ethcore::receipt::Receipt;
+use receipt::{Receipt};
-use ethcore::spec::Spec;
+use spec::Spec;
-use ethcore::engine::Engine;
+use engine::Engine;
-use super::{MinerService, MinerStatus, TransactionQueue, AccountDetails, TransactionImportResult, TransactionOrigin};
+use miner::{MinerService, MinerStatus, TransactionQueue, AccountDetails, TransactionImportResult, TransactionOrigin};
 
 /// Keeps track of transactions using priority queue and holds currently mined block.
 pub struct Miner {
@@ -104,7 +104,7 @@ impl Miner {
 	/// Prepares new block for sealing including top transactions from queue.
 	#[cfg_attr(feature="dev", allow(match_same_arms))]
 	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
-	fn prepare_sealing(&self, chain: &BlockChainClient) {
+	fn prepare_sealing(&self, chain: &MiningBlockChainClient) {
 		trace!(target: "miner", "prepare_sealing: entering");
 		let transactions = self.transaction_queue.lock().unwrap().top_transactions();
 		let mut sealing_work = self.sealing_work.lock().unwrap();
@@ -205,14 +205,14 @@ impl Miner {
 		trace!(target: "miner", "prepare_sealing: leaving (last={:?})", sealing_work.peek_last_ref().map(|b| b.block().fields().header.hash()));
 	}
 
-	fn update_gas_limit(&self, chain: &BlockChainClient) {
+	fn update_gas_limit(&self, chain: &MiningBlockChainClient) {
 		let gas_limit = HeaderView::new(&chain.best_block_header()).gas_limit();
 		let mut queue = self.transaction_queue.lock().unwrap();
 		queue.set_gas_limit(gas_limit);
 	}
 
 	/// Returns true if we had to prepare new pending block
-	fn enable_and_prepare_sealing(&self, chain: &BlockChainClient) -> bool {
+	fn enable_and_prepare_sealing(&self, chain: &MiningBlockChainClient) -> bool {
 		trace!(target: "miner", "enable_and_prepare_sealing: entering");
 		let have_work = self.sealing_work.lock().unwrap().peek_last_ref().is_some();
 		trace!(target: "miner", "enable_and_prepare_sealing: have_work={}", have_work);
@@ -236,7 +236,7 @@ const SEALING_TIMEOUT_IN_BLOCKS : u64 = 5;
 
 impl MinerService for Miner {
 
-	fn clear_and_reset(&self, chain: &BlockChainClient) {
+	fn clear_and_reset(&self, chain: &MiningBlockChainClient) {
 		self.transaction_queue.lock().unwrap().clear();
 		self.update_sealing(chain);
 	}
@@ -251,7 +251,7 @@ impl MinerService for Miner {
 		}
 	}
 
-	fn call(&self, chain: &BlockChainClient, t: &SignedTransaction) -> Result<Executed, ExecutionError> {
+	fn call(&self, chain: &MiningBlockChainClient, t: &SignedTransaction, vm_tracing: bool) -> Result<Executed, ExecutionError> {
 		let sealing_work = self.sealing_work.lock().unwrap();
 		match sealing_work.peek_last_ref() {
 			Some(work) => {
@@ -277,17 +277,18 @@ impl MinerService for Miner {
 				// give the sender max balance
 				state.sub_balance(&sender, &balance);
 				state.add_balance(&sender, &U256::max_value());
-				let options = TransactOptions { tracing: false, check_nonce: false };
+				let options = TransactOptions { tracing: false, vm_tracing: vm_tracing, check_nonce: false };
 
+				// TODO: use vm_trace here.
 				Executive::new(&mut state, &env_info, self.engine(), chain.vm_factory()).transact(t, options)
 			},
 			None => {
-				chain.call(t)
+				chain.call(t, vm_tracing)
 			}
 		}
 	}
 
-	fn balance(&self, chain: &BlockChainClient, address: &Address) -> U256 {
+	fn balance(&self, chain: &MiningBlockChainClient, address: &Address) -> U256 {
 		let sealing_work = self.sealing_work.lock().unwrap();
 		sealing_work.peek_last_ref().map_or_else(
 			|| chain.latest_balance(address),
@@ -295,7 +296,7 @@ impl MinerService for Miner {
 		)
 	}
 
-	fn storage_at(&self, chain: &BlockChainClient, address: &Address, position: &H256) -> H256 {
+	fn storage_at(&self, chain: &MiningBlockChainClient, address: &Address, position: &H256) -> H256 {
 		let sealing_work = self.sealing_work.lock().unwrap();
 		sealing_work.peek_last_ref().map_or_else(
 			|| chain.latest_storage_at(address, position),
@@ -303,12 +304,12 @@ impl MinerService for Miner {
 		)
 	}
 
-	fn nonce(&self, chain: &BlockChainClient, address: &Address) -> U256 {
+	fn nonce(&self, chain: &MiningBlockChainClient, address: &Address) -> U256 {
 		let sealing_work = self.sealing_work.lock().unwrap();
 		sealing_work.peek_last_ref().map_or_else(|| chain.latest_nonce(address), |b| b.block().fields().state.nonce(address))
 	}
 
-	fn code(&self, chain: &BlockChainClient, address: &Address) -> Option<Bytes> {
+	fn code(&self, chain: &MiningBlockChainClient, address: &Address) -> Option<Bytes> {
 		let sealing_work = self.sealing_work.lock().unwrap();
 		sealing_work.peek_last_ref().map_or_else(|| chain.code(address), |b| b.block().fields().state.code(address))
 	}
@@ -375,7 +376,7 @@ impl MinerService for Miner {
 			.collect()
 	}
 
-	fn import_own_transaction<T>(&self, chain: &BlockChainClient, transaction: SignedTransaction, fetch_account: T) ->
+	fn import_own_transaction<T>(&self, chain: &MiningBlockChainClient, transaction: SignedTransaction, fetch_account: T) ->
 		Result<TransactionImportResult, Error>
 		where T: Fn(&Address) -> AccountDetails {
 		let hash = transaction.hash();
@@ -469,7 +470,7 @@ impl MinerService for Miner {
 		self.transaction_queue.lock().unwrap().last_nonce(address)
 	}
 
-	fn update_sealing(&self, chain: &BlockChainClient) {
+	fn update_sealing(&self, chain: &MiningBlockChainClient) {
 		if self.sealing_enabled.load(atomic::Ordering::Relaxed) {
 			let current_no = chain.chain_info().best_block_number;
 			let has_local_transactions = self.transaction_queue.lock().unwrap().has_local_pending_transactions();
@@ -489,7 +490,7 @@ impl MinerService for Miner {
 		}
 	}
 
-	fn map_sealing_work<F, T>(&self, chain: &BlockChainClient, f: F) -> Option<T> where F: FnOnce(&ClosedBlock) -> T {
+	fn map_sealing_work<F, T>(&self, chain: &MiningBlockChainClient, f: F) -> Option<T> where F: FnOnce(&ClosedBlock) -> T {
 		trace!(target: "miner", "map_sealing_work: entering");
 		self.enable_and_prepare_sealing(chain);
 		trace!(target: "miner", "map_sealing_work: sealing prepared");
@@ -499,7 +500,7 @@ impl MinerService for Miner {
 		ret.map(f)
 	}
 
-	fn submit_seal(&self, chain: &BlockChainClient, pow_hash: H256, seal: Vec<Bytes>) -> Result<(), Error> {
+	fn submit_seal(&self, chain: &MiningBlockChainClient, pow_hash: H256, seal: Vec<Bytes>) -> Result<(), Error> {
 		if let Some(b) = self.sealing_work.lock().unwrap().take_used_if(|b| &b.hash() == &pow_hash) {
 			match chain.try_seal(b.lock(), seal) {
 				Err(_) => {
@@ -522,8 +523,8 @@ impl MinerService for Miner {
 		}
 	}
 
-	fn chain_new_blocks(&self, chain: &BlockChainClient, _imported: &[H256], _invalid: &[H256], enacted: &[H256], retracted: &[H256]) {
+	fn chain_new_blocks(&self, chain: &MiningBlockChainClient, _imported: &[H256], _invalid: &[H256], enacted: &[H256], retracted: &[H256]) {
-		fn fetch_transactions(chain: &BlockChainClient, hash: &H256) -> Vec<SignedTransaction> {
+		fn fetch_transactions(chain: &MiningBlockChainClient, hash: &H256) -> Vec<SignedTransaction> {
 			let block = chain
 				.block(BlockID::Hash(*hash))
 				// Client should send message after commit to db and inserting to chain.
@@ -584,13 +585,13 @@ impl MinerService for Miner {
 #[cfg(test)]
 mod tests {
 
-	use MinerService;
+	use super::super::MinerService;
-	use super::{Miner};
+	use super::Miner;
 	use util::*;
-	use ethcore::client::{TestBlockChainClient, EachBlockWith};
+	use client::{TestBlockChainClient, EachBlockWith};
-	use ethcore::block::*;
+	use block::*;
 
-	// TODO [ToDr] To uncomment when TestBlockChainClient can actually return a ClosedBlock.
+	// TODO [ToDr] To uncomment` when TestBlockChainClient can actually return a ClosedBlock.
 	#[ignore]
 	#[test]
 	fn should_prepare_block_to_seal() {

ethcore/src/miner/mod.rs

@@ -26,12 +26,10 @@
 //! ```rust
 //! extern crate ethcore_util as util;
 //! extern crate ethcore;
-//! extern crate ethminer;
 //! use std::env;
 //! use util::network::{NetworkService, NetworkConfiguration};
 //! use ethcore::client::{Client, ClientConfig};
-//! use ethcore::ethereum;
+//! use ethcore::miner::{Miner, MinerService};
-//! use ethminer::{Miner, MinerService};
 //!
 //! fn main() {
 //!		let miner: Miner = Miner::default();
@@ -43,30 +41,21 @@
 //! }
 //! ```
 
-
-#[macro_use]
-extern crate log;
-#[macro_use]
-extern crate ethcore_util as util;
-extern crate ethcore;
-extern crate env_logger;
-extern crate rayon;
-
 mod miner;
 mod external;
 mod transaction_queue;
 
-pub use transaction_queue::{TransactionQueue, AccountDetails, TransactionImportResult, TransactionOrigin};
+pub use self::transaction_queue::{TransactionQueue, AccountDetails, TransactionImportResult, TransactionOrigin};
-pub use miner::{Miner};
+pub use self::miner::{Miner};
-pub use external::{ExternalMiner, ExternalMinerService};
+pub use self::external::{ExternalMiner, ExternalMinerService};
 
 use std::collections::BTreeMap;
 use util::{H256, U256, Address, Bytes};
-use ethcore::client::{BlockChainClient, Executed};
+use client::{MiningBlockChainClient, Executed};
-use ethcore::block::ClosedBlock;
+use block::ClosedBlock;
-use ethcore::receipt::Receipt;
+use receipt::Receipt;
-use ethcore::error::{Error, ExecutionError};
+use error::{Error, ExecutionError};
-use ethcore::transaction::SignedTransaction;
+use transaction::SignedTransaction;
 
 /// Miner client API
 pub trait MinerService : Send + Sync {
@@ -110,7 +99,7 @@ pub trait MinerService : Send + Sync {
 		where T: Fn(&Address) -> AccountDetails, Self: Sized;
 
 	/// Imports own (node owner) transaction to queue.
-	fn import_own_transaction<T>(&self, chain: &BlockChainClient, transaction: SignedTransaction, fetch_account: T) ->
+	fn import_own_transaction<T>(&self, chain: &MiningBlockChainClient, transaction: SignedTransaction, fetch_account: T) ->
 		Result<TransactionImportResult, Error>
 		where T: Fn(&Address) -> AccountDetails, Self: Sized;
 
@@ -118,20 +107,20 @@ pub trait MinerService : Send + Sync {
 	fn pending_transactions_hashes(&self) -> Vec<H256>;
 
 	/// Removes all transactions from the queue and restart mining operation.
-	fn clear_and_reset(&self, chain: &BlockChainClient);
+	fn clear_and_reset(&self, chain: &MiningBlockChainClient);
 
 	/// Called when blocks are imported to chain, updates transactions queue.
-	fn chain_new_blocks(&self, chain: &BlockChainClient, imported: &[H256], invalid: &[H256], enacted: &[H256], retracted: &[H256]);
+	fn chain_new_blocks(&self, chain: &MiningBlockChainClient, imported: &[H256], invalid: &[H256], enacted: &[H256], retracted: &[H256]);
 
 	/// New chain head event. Restart mining operation.
-	fn update_sealing(&self, chain: &BlockChainClient);
+	fn update_sealing(&self, chain: &MiningBlockChainClient);
 
 	/// Submit `seal` as a valid solution for the header of `pow_hash`.
 	/// Will check the seal, but not actually insert the block into the chain.
-	fn submit_seal(&self, chain: &BlockChainClient, pow_hash: H256, seal: Vec<Bytes>) -> Result<(), Error>;
+	fn submit_seal(&self, chain: &MiningBlockChainClient, pow_hash: H256, seal: Vec<Bytes>) -> Result<(), Error>;
 
 	/// Get the sealing work package and if `Some`, apply some transform.
-	fn map_sealing_work<F, T>(&self, chain: &BlockChainClient, f: F) -> Option<T>
+	fn map_sealing_work<F, T>(&self, chain: &MiningBlockChainClient, f: F) -> Option<T>
 		where F: FnOnce(&ClosedBlock) -> T, Self: Sized;
 
 	/// Query pending transactions for hash.
@@ -156,19 +145,19 @@ pub trait MinerService : Send + Sync {
 	fn sensible_gas_limit(&self) -> U256 { 21000.into() }
 
 	/// Latest account balance in pending state.
-	fn balance(&self, chain: &BlockChainClient, address: &Address) -> U256;
+	fn balance(&self, chain: &MiningBlockChainClient, address: &Address) -> U256;
 
 	/// Call into contract code using pending state.
-	fn call(&self, chain: &BlockChainClient, t: &SignedTransaction) -> Result<Executed, ExecutionError>;
+	fn call(&self, chain: &MiningBlockChainClient, t: &SignedTransaction, vm_tracing: bool) -> Result<Executed, ExecutionError>;
 
 	/// Get storage value in pending state.
-	fn storage_at(&self, chain: &BlockChainClient, address: &Address, position: &H256) -> H256;
+	fn storage_at(&self, chain: &MiningBlockChainClient, address: &Address, position: &H256) -> H256;
 
 	/// Get account nonce in pending state.
-	fn nonce(&self, chain: &BlockChainClient, address: &Address) -> U256;
+	fn nonce(&self, chain: &MiningBlockChainClient, address: &Address) -> U256;
 
 	/// Get contract code in pending state.
-	fn code(&self, chain: &BlockChainClient, address: &Address) -> Option<Bytes>;
+	fn code(&self, chain: &MiningBlockChainClient, address: &Address) -> Option<Bytes>;
 }
 
 /// Mining status

ethcore/src/miner/transaction_queue.rs

@@ -26,13 +26,12 @@
 //! ```rust
 //! extern crate ethcore_util as util;
 //! extern crate ethcore;
-//! extern crate ethminer;
 //! extern crate rustc_serialize;
 //!
 //!	use util::crypto::KeyPair;
 //! use util::hash::Address;
 //! use util::numbers::{Uint, U256};
-//!	use ethminer::{TransactionQueue, AccountDetails, TransactionOrigin};
+//!	use ethcore::miner::{TransactionQueue, AccountDetails, TransactionOrigin};
 //!	use ethcore::transaction::*;
 //!	use rustc_serialize::hex::FromHex;
 //!
@@ -89,8 +88,8 @@ use std::collections::{HashMap, BTreeSet};
 use util::numbers::{Uint, U256};
 use util::hash::{Address, H256};
 use util::table::*;
-use ethcore::transaction::*;
+use transaction::*;
-use ethcore::error::{Error, TransactionError};
+use error::{Error, TransactionError};
 
 /// Transaction origin
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
@@ -778,8 +777,8 @@ mod test {
 	extern crate rustc_serialize;
 	use util::table::*;
 	use util::*;
-	use ethcore::transaction::*;
+	use transaction::*;
-	use ethcore::error::{Error, TransactionError};
+	use error::{Error, TransactionError};
 	use super::*;
 	use super::{TransactionSet, TransactionOrder, VerifiedTransaction};
 

ethcore/src/service.rs

@@ -21,6 +21,7 @@ use util::panics::*;
 use spec::Spec;
 use error::*;
 use client::{Client, ClientConfig};
+use miner::Miner;
 
 /// Message type for external and internal events
 #[derive(Clone)]
@@ -54,14 +55,14 @@ pub struct ClientService {
 
 impl ClientService {
 	/// Start the service in a separate thread.
-	pub fn start(config: ClientConfig, spec: Spec, net_config: NetworkConfiguration, db_path: &Path) -> Result<ClientService, Error> {
+	pub fn start(config: ClientConfig, spec: Spec, net_config: NetworkConfiguration, db_path: &Path, miner: Arc<Miner>) -> Result<ClientService, Error> {
 		let panic_handler = PanicHandler::new_in_arc();
 		let mut net_service = try!(NetworkService::start(net_config));
 		panic_handler.forward_from(&net_service);
 
 		info!("Starting {}", net_service.host_info());
 		info!("Configured for {} using {:?} engine", spec.name, spec.engine.name());
-		let client = try!(Client::new(config, spec, db_path, net_service.io().channel()));
+		let client = try!(Client::new(config, spec, db_path, miner, net_service.io().channel()));
 		panic_handler.forward_from(client.deref());
 		let client_io = Arc::new(ClientIoHandler {
 			client: client.clone()
@@ -141,12 +142,14 @@ mod tests {
 	use util::network::*;
 	use devtools::*;
 	use client::ClientConfig;
+	use std::sync::Arc;
+	use miner::Miner;
 
 	#[test]
 	fn it_can_be_started() {
 		let spec = get_test_spec();
 		let temp_path = RandomTempPath::new();
-		let service = ClientService::start(ClientConfig::default(), spec, NetworkConfiguration::new_local(), &temp_path.as_path());
+		let service = ClientService::start(ClientConfig::default(), spec, NetworkConfiguration::new_local(), &temp_path.as_path(), Arc::new(Miner::default()));
 		assert!(service.is_ok());
 	}
 }

ethcore/src/state.rs

@@ -183,16 +183,14 @@ impl State {
 
 	/// Add `incr` to the balance of account `a`.
 	pub fn add_balance(&mut self, a: &Address, incr: &U256) {
-		let old = self.balance(a);
+		trace!(target: "state", "add_balance({}, {}): {}", a, incr, self.balance(a));
 		self.require(a, false).add_balance(incr);
-		trace!("state: add_balance({}, {}): {} -> {}\n", a, incr, old, self.balance(a));
 	}
 
 	/// Subtract `decr` from the balance of account `a`.
 	pub fn sub_balance(&mut self, a: &Address, decr: &U256) {
-		let old = self.balance(a);
+		trace!(target: "state", "sub_balance({}, {}): {}", a, decr, self.balance(a));
 		self.require(a, false).sub_balance(decr);
-		trace!("state: sub_balance({}, {}): {} -> {}\n", a, decr, old, self.balance(a));
 	}
 
 	/// Subtracts `by` from the balance of `from` and adds it to that of `to`.
@@ -222,7 +220,7 @@ impl State {
 	pub fn apply(&mut self, env_info: &EnvInfo, engine: &Engine, vm_factory: &EvmFactory, t: &SignedTransaction, tracing: bool) -> ApplyResult {
 //		let old = self.to_pod();
 
-		let options = TransactOptions { tracing: tracing, check_nonce: true };
+		let options = TransactOptions { tracing: tracing, vm_tracing: false, check_nonce: true };
 		let e = try!(Executive::new(self, env_info, engine, vm_factory).transact(t, options));
 
 		// TODO uncomment once to_pod() works correctly.

ethcore/src/tests/client.rs

@@ -14,16 +14,17 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-use client::{BlockChainClient, Client, ClientConfig, BlockID};
+use client::{BlockChainClient, MiningBlockChainClient, Client, ClientConfig, BlockID};
 use block::IsBlock;
 use tests::helpers::*;
 use common::*;
 use devtools::*;
+use miner::Miner;
 
 #[test]
 fn imports_from_empty() {
 	let dir = RandomTempPath::new();
-	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), IoChannel::disconnected()).unwrap();
+	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::default()), IoChannel::disconnected()).unwrap();
 	client.import_verified_blocks(&IoChannel::disconnected());
 	client.flush_queue();
 }
@@ -41,7 +42,7 @@ fn returns_state_root_basic() {
 #[test]
 fn imports_good_block() {
 	let dir = RandomTempPath::new();
-	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), IoChannel::disconnected()).unwrap();
+	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::default()), IoChannel::disconnected()).unwrap();
 	let good_block = get_good_dummy_block();
 	if let Err(_) = client.import_block(good_block) {
 		panic!("error importing block being good by definition");
@@ -56,7 +57,7 @@ fn imports_good_block() {
 #[test]
 fn query_none_block() {
 	let dir = RandomTempPath::new();
-	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), IoChannel::disconnected()).unwrap();
+	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::default()), IoChannel::disconnected()).unwrap();
 
     let non_existant = client.block_header(BlockID::Number(188));
 	assert!(non_existant.is_none());

ethcore/src/tests/helpers.rs

@@ -23,6 +23,7 @@ use evm::Schedule;
 use engine::*;
 use ethereum;
 use devtools::*;
+use miner::Miner;
 
 #[cfg(feature = "json-tests")]
 pub enum ChainEra {
@@ -139,7 +140,7 @@ pub fn create_test_block_with_data(header: &Header, transactions: &[&SignedTrans
 pub fn generate_dummy_client(block_number: u32) -> GuardedTempResult<Arc<Client>> {
 	let dir = RandomTempPath::new();
 
-	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), IoChannel::disconnected()).unwrap();
+	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::default()), IoChannel::disconnected()).unwrap();
 	let test_spec = get_test_spec();
 	let test_engine = &test_spec.engine;
 	let state_root = test_spec.genesis_header().state_root;
@@ -205,7 +206,7 @@ pub fn push_blocks_to_client(client: &Arc<Client>, timestamp_salt: u64, starting
 
 pub fn get_test_client_with_blocks(blocks: Vec<Bytes>) -> GuardedTempResult<Arc<Client>> {
 	let dir = RandomTempPath::new();
-	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), IoChannel::disconnected()).unwrap();
+	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::default()), IoChannel::disconnected()).unwrap();
 	for block in &blocks {
 		if let Err(_) = client.import_block(block.clone()) {
 			panic!("panic importing block which is well-formed");

ethcore/src/trace/executive_tracer.rs

@@ -18,13 +18,13 @@
 
 use util::{Bytes, Address, U256};
 use action_params::ActionParams;
-use trace::trace::{Trace, Call, Create, Action, Res, CreateResult, CallResult};
+use trace::trace::{Trace, Call, Create, Action, Res, CreateResult, CallResult, VMTrace, VMOperation, VMExecutedOperation, MemoryDiff, StorageDiff};
-use trace::Tracer;
+use trace::{Tracer, VMTracer};
 
 /// Simple executive tracer. Traces all calls and creates. Ignores delegatecalls.
 #[derive(Default)]
 pub struct ExecutiveTracer {
-	traces: Vec<Trace>
+	traces: Vec<Trace>,
 }
 
 impl Tracer for ExecutiveTracer {
@@ -40,8 +40,7 @@ impl Tracer for ExecutiveTracer {
 		Some(vec![])
 	}
 
-	fn trace_call(&mut self, call: Option<Call>, gas_used: U256, output: Option<Bytes>, depth: usize, subs:
+	fn trace_call(&mut self, call: Option<Call>, gas_used: U256, output: Option<Bytes>, depth: usize, subs: Vec<Trace>, delegate_call: bool) {
-				  Vec<Trace>, delegate_call: bool) {
 		// don't trace if it's DELEGATECALL or CALLCODE.
 		if delegate_call {
 			return;
@@ -106,3 +105,46 @@ impl Tracer for ExecutiveTracer {
 		self.traces
 	}
 }
+
+/// Simple VM tracer. Traces all operations.
+#[derive(Default)]
+pub struct ExecutiveVMTracer {
+	data: VMTrace,
+}
+
+impl VMTracer for ExecutiveVMTracer {
+	fn trace_prepare_execute(&mut self, pc: usize, instruction: u8, gas_cost: &U256) -> bool {
+		self.data.operations.push(VMOperation {
+			pc: pc,
+			instruction: instruction,
+			gas_cost: gas_cost.clone(),	
+			executed: None,
+		});
+		true
+	}
+
+	fn trace_executed(&mut self, gas_used: U256, stack_push: &[U256], mem_diff: Option<(usize, &[u8])>, store_diff: Option<(U256, U256)>) {
+		let ex = VMExecutedOperation {
+			gas_used: gas_used,
+			stack_push: stack_push.iter().cloned().collect(),
+			mem_diff: mem_diff.map(|(s, r)| MemoryDiff{ offset: s, data: r.iter().cloned().collect() }),
+			store_diff: store_diff.map(|(l, v)| StorageDiff{ location: l, value: v }),
+		};
+		self.data.operations.last_mut().expect("trace_executed is always called after a trace_prepare_execute").executed = Some(ex);
+	}
+
+	fn prepare_subtrace(&self, code: &Bytes) -> Self {
+		ExecutiveVMTracer { data: VMTrace {
+			parent_step: self.data.operations.len(),
+			code: code.clone(),
+			operations: vec![],
+			subs: vec![],
+		}}
+	}
+
+	fn done_subtrace(&mut self, sub: Self) {
+		self.data.subs.push(sub.data);
+	}
+
+	fn drain(mut self) -> Option<VMTrace> { self.data.subs.pop() }
+}

ethcore/src/trace/mod.rs

@@ -31,9 +31,9 @@ pub use self::block::BlockTraces;
 pub use self::config::{Config, Switch};
 pub use self::db::TraceDB;
 pub use self::error::Error;
-pub use types::trace_types::trace::Trace;
+pub use types::trace_types::trace::{Trace, VMTrace, VMOperation, VMExecutedOperation, MemoryDiff, StorageDiff};
-pub use self::noop_tracer::NoopTracer;
+pub use self::noop_tracer::{NoopTracer, NoopVMTracer};
-pub use self::executive_tracer::ExecutiveTracer;
+pub use self::executive_tracer::{ExecutiveTracer, ExecutiveVMTracer};
 pub use types::trace_types::filter::{Filter, AddressesFilter};
 pub use self::import::ImportRequest;
 pub use self::localized::LocalizedTrace;
@@ -81,13 +81,32 @@ pub trait Tracer: Send {
 	/// Stores failed create trace.
 	fn trace_failed_create(&mut self, create: Option<Create>, depth: usize, subs: Vec<Trace>);
 
-	/// Spawn subracer which will be used to trace deeper levels of execution.
+	/// Spawn subtracer which will be used to trace deeper levels of execution.
 	fn subtracer(&self) -> Self where Self: Sized;
 
 	/// Consumes self and returns all traces.
 	fn traces(self) -> Vec<Trace>;
 }
 
+/// Used by executive to build VM traces.
+pub trait VMTracer: Send {
+	/// Trace the preparation to execute a single instruction.
+	/// @returns true if `trace_executed` should be called.
+	fn trace_prepare_execute(&mut self, _pc: usize, _instruction: u8, _gas_cost: &U256) -> bool { false }
+
+	/// Trace the finalised execution of a single instruction.
+	fn trace_executed(&mut self, _gas_used: U256, _stack_push: &[U256], _mem_diff: Option<(usize, &[u8])>, _store_diff: Option<(U256, U256)>) {}
+
+	/// Spawn subtracer which will be used to trace deeper levels of execution.
+	fn prepare_subtrace(&self, code: &Bytes) -> Self where Self: Sized;
+
+	/// Spawn subtracer which will be used to trace deeper levels of execution.
+	fn done_subtrace(&mut self, sub: Self) where Self: Sized;
+
+	/// Consumes self and returns the VM trace.
+	fn drain(self) -> Option<VMTrace>;
+}
+
 /// `DbExtras` provides an interface to query extra data which is not stored in tracesdb,
 /// but necessary to work correctly.
 pub trait DatabaseExtras {

ethcore/src/trace/noop_tracer.rs

@@ -18,8 +18,8 @@
 
 use util::{Bytes, Address, U256};
 use action_params::ActionParams;
-use trace::Tracer;
+use trace::{Tracer, VMTracer};
-use trace::trace::{Trace, Call, Create};
+use trace::trace::{Trace, Call, Create, VMTrace};
 
 /// Nonoperative tracer. Does not trace anything.
 pub struct NoopTracer;
@@ -63,3 +63,23 @@ impl Tracer for NoopTracer {
 		vec![]
 	}
 }
+
+/// Nonoperative VM tracer. Does not trace anything.
+pub struct NoopVMTracer;
+
+impl VMTracer for NoopVMTracer {
+	/// Trace the preparation to execute a single instruction.
+	fn trace_prepare_execute(&mut self, _pc: usize, _instruction: u8, _gas_cost: &U256) -> bool { false }
+
+	/// Trace the finalised execution of a single instruction.
+	fn trace_executed(&mut self, _gas_used: U256, _stack_push: &[U256], _mem_diff: Option<(usize, &[u8])>, _store_diff: Option<(U256, U256)>) {}
+
+	/// Spawn subtracer which will be used to trace deeper levels of execution.
+	fn prepare_subtrace(&self, _code: &Bytes) -> Self { NoopVMTracer }
+
+	/// Spawn subtracer which will be used to trace deeper levels of execution.
+	fn done_subtrace(&mut self, _sub: Self) {}
+
+	/// Consumes self and returns all VM traces.
+	fn drain(self) -> Option<VMTrace> { None }
+}

ethcore/src/types/executed.rs

@@ -18,7 +18,7 @@
 
 use util::numbers::*;
 use util::Bytes;
-use trace::Trace;
+use trace::{Trace, VMTrace};
 use types::log_entry::LogEntry;
 use ipc::binary::BinaryConvertError;
 use std::fmt;
@@ -59,6 +59,8 @@ pub struct Executed {
 	pub output: Bytes,
 	/// The trace of this transaction.
 	pub trace: Option<Trace>,
+	/// The VM trace of this transaction.
+	pub vm_trace: Option<VMTrace>,
 }
 
 /// Result of executing the transaction.

ethcore/src/types/trace_types/trace.rs

@@ -349,6 +349,170 @@ impl Trace {
 	}
 }
 
+#[derive(Debug, Clone, PartialEq, Binary)]
+/// A diff of some chunk of memory.
+pub struct MemoryDiff {
+	/// Offset into memory the change begins.
+	pub offset: usize,
+	/// The changed data.
+	pub data: Bytes,
+}
+
+impl Encodable for MemoryDiff {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		s.begin_list(2);
+		s.append(&self.offset);
+		s.append(&self.data);
+	}
+}
+
+impl Decodable for MemoryDiff {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		let d = decoder.as_rlp();
+		Ok(MemoryDiff {
+			offset: try!(d.val_at(0)),
+			data: try!(d.val_at(1)),
+		})
+	}
+}
+
+#[derive(Debug, Clone, PartialEq, Binary)]
+/// A diff of some storage value.
+pub struct StorageDiff {
+	/// Which key in storage is changed.
+	pub location: U256,
+	/// What the value has been changed to.
+	pub value: U256,
+}
+
+impl Encodable for StorageDiff {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		s.begin_list(2);
+		s.append(&self.location);
+		s.append(&self.value);
+	}
+}
+
+impl Decodable for StorageDiff {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		let d = decoder.as_rlp();
+		Ok(StorageDiff {
+			location: try!(d.val_at(0)),
+			value: try!(d.val_at(1)),
+		})
+	}
+}
+
+#[derive(Debug, Clone, PartialEq, Binary)]
+/// A record of an executed VM operation.
+pub struct VMExecutedOperation {
+	/// The total gas used.
+	pub gas_used: U256,
+	/// The stack item placed, if any.
+	pub stack_push: Vec<U256>,
+	/// If altered, the memory delta.
+	pub mem_diff: Option<MemoryDiff>,
+	/// The altered storage value, if any.
+	pub store_diff: Option<StorageDiff>,
+}
+
+impl Encodable for VMExecutedOperation {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		s.begin_list(4);
+		s.append(&self.gas_used);
+		s.append(&self.stack_push);
+		s.append(&self.mem_diff);
+		s.append(&self.store_diff);
+	}
+}
+
+impl Decodable for VMExecutedOperation {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		let d = decoder.as_rlp();
+		Ok(VMExecutedOperation {
+			gas_used: try!(d.val_at(0)),
+			stack_push: try!(d.val_at(1)),
+			mem_diff: try!(d.val_at(2)),
+			store_diff: try!(d.val_at(3)),
+		})
+	}
+}
+
+#[derive(Debug, Clone, PartialEq, Binary)]
+/// A record of the execution of a single VM operation.
+pub struct VMOperation {
+	/// The program counter.
+	pub pc: usize,
+	/// The instruction executed.
+	pub instruction: u8,
+	/// The gas cost for this instruction.
+	pub gas_cost: U256,
+	/// Information concerning the execution of the operation.
+	pub executed: Option<VMExecutedOperation>,
+}
+
+impl Encodable for VMOperation {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		s.begin_list(4);
+		s.append(&self.pc);
+		s.append(&self.instruction);
+		s.append(&self.gas_cost);
+		s.append(&self.executed);
+	}
+}
+
+impl Decodable for VMOperation {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		let d = decoder.as_rlp();
+		let res = VMOperation {
+			pc: try!(d.val_at(0)),
+			instruction: try!(d.val_at(1)),
+			gas_cost: try!(d.val_at(2)),
+			executed: try!(d.val_at(3)),
+		};
+
+		Ok(res)
+	}
+}
+
+#[derive(Debug, Clone, PartialEq, Binary, Default)]
+/// A record of a full VM trace for a CALL/CREATE.
+pub struct VMTrace {
+	/// The step (i.e. index into operations) at which this trace corresponds.
+	pub parent_step: usize,
+	/// The code to be executed.
+	pub code: Bytes,
+	/// The operations executed.
+	pub operations: Vec<VMOperation>,
+	/// The sub traces for each interior action performed as part of this call/create.
+	/// Thre is a 1:1 correspondance between these and a CALL/CREATE/CALLCODE/DELEGATECALL instruction.
+	pub subs: Vec<VMTrace>,
+}
+
+impl Encodable for VMTrace {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		s.begin_list(4);
+		s.append(&self.parent_step);
+		s.append(&self.code);
+		s.append(&self.operations);
+		s.append(&self.subs);
+	}
+}
+
+impl Decodable for VMTrace {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		let d = decoder.as_rlp();
+		let res = VMTrace {
+			parent_step: try!(d.val_at(0)),
+			code: try!(d.val_at(1)),
+			operations: try!(d.val_at(2)),
+			subs: try!(d.val_at(3)),
+		};
+
+		Ok(res)
+	}
+}
+
 #[cfg(test)]
 mod tests {
 	use util::{Address, U256, FixedHash};

json/src/state/transaction.rs

@@ -40,7 +40,7 @@ pub struct Transaction {
 	/// To.
 	pub to: MaybeEmpty<Address>,
 	/// Value.
-	pub value: Uint
+	pub value: Uint,
 }
 
 #[cfg(test)]

miner/Cargo.toml

@@ -1,24 +0,0 @@
-[package]
-description = "Ethminer library"
-homepage = "http://ethcore.io"
-license = "GPL-3.0"
-name = "ethminer"
-version = "1.2.0"
-authors = ["Ethcore <admin@ethcore.io>"]
-build = "build.rs"
-
-[build-dependencies]
-rustc_version = "0.1"
-
-[dependencies]
-ethcore-util = { path = "../util" }
-ethcore = { path = "../ethcore" }
-log = "0.3"
-env_logger = "0.3"
-rustc-serialize = "0.3"
-rayon = "0.3.1"
-clippy = { version = "0.0.69", optional = true}
-
-[features]
-default = []
-dev = ["clippy"]

parity/main.rs

@@ -27,7 +27,6 @@ extern crate rustc_serialize;
 extern crate ethcore_util as util;
 extern crate ethcore;
 extern crate ethsync;
-extern crate ethminer;
 #[macro_use]
 extern crate log as rlog;
 extern crate env_logger;
@@ -86,7 +85,7 @@ use ethcore::error::{Error, ImportError};
 use ethcore::service::ClientService;
 use ethcore::spec::Spec;
 use ethsync::EthSync;
-use ethminer::{Miner, MinerService, ExternalMiner};
+use ethcore::miner::{Miner, MinerService, ExternalMiner};
 use daemonize::Daemonize;
 use migration::migrate;
 use informant::Informant;
@@ -174,14 +173,6 @@ fn execute_client(conf: Configuration, spec: Spec, client_config: ClientConfig)
 	// Secret Store
 	let account_service = Arc::new(conf.account_service());
 
-	// Build client
-	let mut service = ClientService::start(
-		client_config, spec, net_settings, Path::new(&conf.path())
-	).unwrap_or_else(|e| die_with_error("Client", e));
-
-	panic_handler.forward_from(&service);
-	let client = service.client();
-
 	// Miner
 	let miner = Miner::with_accounts(conf.args.flag_force_sealing, conf.spec(), account_service.clone());
 	miner.set_author(conf.author());
@@ -190,11 +181,19 @@ fn execute_client(conf: Configuration, spec: Spec, client_config: ClientConfig)
 	miner.set_minimal_gas_price(conf.gas_price());
 	miner.set_transactions_limit(conf.args.flag_tx_limit);
 
+	// Build client
+	let mut service = ClientService::start(
+		client_config, spec, net_settings, Path::new(&conf.path()), miner.clone()
+	).unwrap_or_else(|e| die_with_error("Client", e));
+
+	panic_handler.forward_from(&service);
+	let client = service.client();
+
 	let external_miner = Arc::new(ExternalMiner::default());
 	let network_settings = Arc::new(conf.network_settings());
 
 	// Sync
-	let sync = EthSync::register(service.network(), sync_config, client.clone(), miner.clone());
+	let sync = EthSync::register(service.network(), sync_config, client.clone());
 
 	let deps_for_rpc_apis = Arc::new(rpc_apis::Dependencies {
 		signer_enabled: conf.args.flag_signer,
@@ -292,7 +291,7 @@ fn execute_export(conf: Configuration) {
 
 	// Build client
 	let service = ClientService::start(
-		client_config, spec, net_settings, Path::new(&conf.path())
+		client_config, spec, net_settings, Path::new(&conf.path()), Arc::new(Miner::default()),
 	).unwrap_or_else(|e| die_with_error("Client", e));
 
 	panic_handler.forward_from(&service);
@@ -363,7 +362,7 @@ fn execute_import(conf: Configuration) {
 
 	// Build client
 	let service = ClientService::start(
-		client_config, spec, net_settings, Path::new(&conf.path())
+		client_config, spec, net_settings, Path::new(&conf.path()), Arc::new(Miner::default()),
 	).unwrap_or_else(|e| die_with_error("Client", e));
 
 	panic_handler.forward_from(&service);

parity/rpc_apis.rs

@@ -20,7 +20,7 @@ use std::sync::Arc;
 
 use die::*;
 use ethsync::EthSync;
-use ethminer::{Miner, ExternalMiner};
+use ethcore::miner::{Miner, ExternalMiner};
 use ethcore::client::Client;
 use util::RotatingLogger;
 use util::keys::store::AccountService;
@@ -153,7 +153,7 @@ pub fn setup_rpc<T: Extendable>(server: T, deps: Arc<Dependencies>, apis: ApiSet
 				}
 			},
 			Api::Ethcore => {
-				server.add_delegate(EthcoreClient::new(&deps.miner, deps.logger.clone(), deps.settings.clone()).to_delegate())
+				server.add_delegate(EthcoreClient::new(&deps.client, &deps.miner, deps.logger.clone(), deps.settings.clone()).to_delegate())
 			},
 			Api::Traces => {
 				server.add_delegate(TracesClient::new(&deps.client).to_delegate())

rpc/Cargo.toml

@@ -18,7 +18,6 @@ ethcore-util = { path = "../util" }
 ethcore = { path = "../ethcore" }
 ethash = { path = "../ethash" }
 ethsync = { path = "../sync" }
-ethminer = { path = "../miner" }
 ethjson = { path = "../json" }
 ethcore-devtools = { path = "../devtools" }
 rustc-serialize = "0.3"
@@ -34,4 +33,4 @@ syntex = "^0.32.0"
 [features]
 default = ["serde_codegen"]
 nightly = ["serde_macros"]
-dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethsync/dev", "ethminer/dev"]
+dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethsync/dev"]

rpc/src/lib.rs

@@ -26,10 +26,10 @@ extern crate serde;
 extern crate serde_json;
 extern crate jsonrpc_core;
 extern crate jsonrpc_http_server;
+#[macro_use]
 extern crate ethcore_util as util;
 extern crate ethcore;
 extern crate ethsync;
-extern crate ethminer;
 extern crate transient_hashmap;
 extern crate json_ipc_server as ipc;
 

rpc/src/v1/helpers/signing_queue.rs

@@ -16,19 +16,23 @@
 
 use std::thread;
 use std::time::{Instant, Duration};
-use std::sync::{mpsc, Mutex, RwLock};
+use std::sync::{mpsc, Mutex, RwLock, Arc};
 use std::collections::HashMap;
 use v1::types::{TransactionRequest, TransactionConfirmation};
 use util::{U256, H256};
 
 
-/// Messages that queue informs about
+/// Possible events happening in the queue that can be listened to.
 #[derive(Debug, PartialEq)]
-pub enum QueueMessage {
+pub enum QueueEvent {
 	/// Receiver should stop work upon receiving `Finish` message.
 	Finish,
-	/// Informs about new transaction request.
+	/// Informs about new request.
 	NewRequest(U256),
+	/// Request rejected.
+	RequestRejected(U256),
+	/// Request resolved.
+	RequestConfirmed(U256),
 }
 
 /// Defines possible errors returned from queue receiving method.
@@ -41,19 +45,20 @@ pub enum QueueError {
 }
 
 /// Message Receiver type
-pub type QueueMessageReceiver = mpsc::Receiver<QueueMessage>;
+pub type QueueEventReceiver = mpsc::Receiver<QueueEvent>;
 
 /// A queue of transactions awaiting to be confirmed and signed.
 pub trait SigningQueue: Send + Sync {
 	/// Add new request to the queue.
-	fn add_request(&self, transaction: TransactionRequest) -> U256;
+	/// Returns a `ConfirmationPromise` that can be used to await for resolution of given request.
+	fn add_request(&self, transaction: TransactionRequest) -> ConfirmationPromise;
 
-	/// Remove request from the queue.
+	/// Removes a request from the queue.
-	/// Notify possible waiters that transaction was rejected.
+	/// Notifies possible token holders that transaction was rejected.
 	fn request_rejected(&self, id: U256) -> Option<TransactionConfirmation>;
 
-	/// Remove request from the queue.
+	/// Removes a request from the queue.
-	/// Notify possible waiters that transaction was confirmed and got given hash.
+	/// Notifies possible token holders that transaction was confirmed and given hash was assigned.
 	fn request_confirmed(&self, id: U256, hash: H256) -> Option<TransactionConfirmation>;
 
 	/// Returns a request if it is contained in the queue.
@@ -61,32 +66,89 @@ pub trait SigningQueue: Send + Sync {
 
 	/// Return copy of all the requests in the queue.
 	fn requests(&self) -> Vec<TransactionConfirmation>;
+}
 
-	/// Blocks for some time waiting for confirmation.
+#[derive(Debug, PartialEq)]
-	/// Returns `None` when timeout reached or transaction was rejected.
+enum ConfirmationResult {
-	/// Returns transaction hash when transaction was confirmed.
+	/// The transaction has not yet been confirmed nor rejected.
-	fn wait_with_timeout(&self, id: U256) -> Option<H256>;
+	Waiting,
+	/// The transaction has been rejected.
+	Rejected,
+	/// The transaction has been confirmed.
+	Confirmed(H256),
 }
 
 /// Time you need to confirm the transaction in UI.
+/// This is the amount of time token holder will wait before
+/// returning `None`.
 /// Unless we have a multi-threaded RPC this will lock
 /// any other incoming call!
 const QUEUE_TIMEOUT_DURATION_SEC : u64 = 20;
 
-#[derive(Debug, Clone)]
+/// A handle to submitted request.
-enum QueueStatus {
+/// Allows to block and wait for a resolution of that request.
-	Waiting,
+pub struct ConfirmationToken {
-	Rejected,
+	result: Arc<Mutex<ConfirmationResult>>,
-	Confirmed(H256),
+	handle: thread::Thread,
+	request: TransactionConfirmation,
+}
+
+pub struct ConfirmationPromise {
+	id: U256,
+	result: Arc<Mutex<ConfirmationResult>>,
+}
+
+impl ConfirmationToken {
+	/// Submit solution to all listeners
+	fn resolve(&self, result: Option<H256>) {
+		let mut res = self.result.lock().unwrap();
+		*res = result.map_or(ConfirmationResult::Rejected, |h| ConfirmationResult::Confirmed(h));
+		// Notify listener
+		self.handle.unpark();
+	}
+
+	fn as_promise(&self) -> ConfirmationPromise {
+		ConfirmationPromise {
+			id: self.request.id,
+			result: self.result.clone(),
+		}
+	}
+}
+
+impl ConfirmationPromise {
+	/// Blocks current thread and awaits for
+	/// resolution of the transaction (rejected / confirmed)
+	/// Returns `None` if transaction was rejected or timeout reached.
+	/// Returns `Some(hash)` if transaction was confirmed.
+	pub fn wait_with_timeout(&self) -> Option<H256> {
+		let timeout = Duration::from_secs(QUEUE_TIMEOUT_DURATION_SEC);
+		let deadline = Instant::now() + timeout;
+
+		info!(target: "own_tx", "Signer: Awaiting transaction confirmation... ({:?}).", self.id);
+		while Instant::now() < deadline {
+			// Park thread
+			thread::park_timeout(timeout);
+			// Take confirmation result
+			let res = self.result.lock().unwrap();
+			// Check the result
+			match *res {
+				ConfirmationResult::Rejected => return None,
+				ConfirmationResult::Confirmed(h) => return Some(h),
+				ConfirmationResult::Waiting => continue,
+			}
+		}
+		// We reached the timeout. Just return `None` and make sure to remove waiting.
+		trace!(target: "own_tx", "Signer: Confirmation timeout reached... ({:?}).", self.id);
+		None
+	}
 }
 
 /// Queue for all unconfirmed transactions.
 pub struct ConfirmationsQueue {
 	id: Mutex<U256>,
-	waiters: RwLock<HashMap<U256, QueueStatus>>,
+	queue: RwLock<HashMap<U256, ConfirmationToken>>,
-	queue: RwLock<HashMap<U256, TransactionConfirmation>>,
+	sender: Mutex<mpsc::Sender<QueueEvent>>,
-	sender: Mutex<mpsc::Sender<QueueMessage>>,
+	receiver: Mutex<Option<mpsc::Receiver<QueueEvent>>>,
-	receiver: Mutex<Option<mpsc::Receiver<QueueMessage>>>,
 }
 
 impl Default for ConfirmationsQueue {
@@ -95,7 +157,6 @@ impl Default for ConfirmationsQueue {
 
 		ConfirmationsQueue {
 			id: Mutex::new(U256::from(0)),
-			waiters: RwLock::new(HashMap::new()),
 			queue: RwLock::new(HashMap::new()),
 			sender: Mutex::new(send),
 			receiver: Mutex::new(Some(recv)),
@@ -104,11 +165,11 @@ impl Default for ConfirmationsQueue {
 }
 
 impl ConfirmationsQueue {
-	/// Blocks the thread and starts listening for notifications.
+	/// Blocks the thread and starts listening for notifications regarding all actions in the queue.
-	/// For each event `listener` callback function will be invoked.
+	/// For each event, `listener` callback will be invoked.
-	/// This method can be used only once.
+	/// This method can be used only once (only single consumer of events can exist).
 	pub fn start_listening<F>(&self, listener: F) -> Result<(), QueueError>
-		where F: Fn(QueueMessage) -> () {
+		where F: Fn(QueueEvent) -> () {
 		let recv = self.receiver.lock().unwrap().take();
 		if let None = recv {
 			return Err(QueueError::AlreadyUsed);
@@ -117,7 +178,7 @@ impl ConfirmationsQueue {
 
 		loop {
 			let message = try!(recv.recv().map_err(|e| QueueError::ReceiverError(e)));
-			if let QueueMessage::Finish = message {
+			if let QueueEvent::Finish = message {
 				return Ok(());
 			}
 
@@ -125,23 +186,35 @@ impl ConfirmationsQueue {
 		}
 	}
 
-	/// Notifies receiver that the communcation is over.
+	/// Notifies consumer that the communcation is over.
+	/// No more events will be sent after this function is invoked.
 	pub fn finish(&self) {
-		self.notify(QueueMessage::Finish);
+		self.notify(QueueEvent::Finish);
 	}
 
-	fn notify(&self, message: QueueMessage) {
+	/// Notifies receiver about the event happening in this queue.
+	fn notify(&self, message: QueueEvent) {
 		// We don't really care about the result
 		let _ = self.sender.lock().unwrap().send(message);
 	}
 
-	fn remove(&self, id: U256) -> Option<TransactionConfirmation> {
+	/// Removes transaction from this queue and notifies `ConfirmationPromise` holders about the result.
-		self.queue.write().unwrap().remove(&id)
+	/// Notifies also a receiver about that event.
-	}
+	fn remove(&self, id: U256, result: Option<H256>) -> Option<TransactionConfirmation> {
+		let token = self.queue.write().unwrap().remove(&id);
 
-	fn update_status(&self, id: U256, status: QueueStatus) {
+		if let Some(token) = token {
-		let mut waiters = self.waiters.write().unwrap();
+			// notify receiver about the event
-		waiters.insert(id, status);
+			self.notify(result.map_or_else(
+				|| QueueEvent::RequestRejected(id),
+				|_| QueueEvent::RequestConfirmed(id)
+			));
+			// notify token holders about resolution
+			token.resolve(result);
+			// return a result
+			return Some(token.request.clone());
+		}
+		None
 	}
 }
 
@@ -152,7 +225,7 @@ impl Drop for ConfirmationsQueue {
 }
 
 impl SigningQueue for  ConfirmationsQueue {
-	fn add_request(&self, transaction: TransactionRequest) -> U256 {
+	fn add_request(&self, transaction: TransactionRequest) -> ConfirmationPromise {
 		// Increment id
 		let id = {
 			let mut last_id = self.id.lock().unwrap();
@@ -160,87 +233,42 @@ impl SigningQueue for  ConfirmationsQueue {
 			*last_id
 		};
 		// Add request to queue
-		{
+		let res = {
 			let mut queue = self.queue.write().unwrap();
-			queue.insert(id, TransactionConfirmation {
+			queue.insert(id, ConfirmationToken {
-				id: id,
+				result: Arc::new(Mutex::new(ConfirmationResult::Waiting)),
-				transaction: transaction,
+				handle: thread::current(),
+				request: TransactionConfirmation {
+					id: id,
+					transaction: transaction,
+				},
 			});
 			debug!(target: "own_tx", "Signer: New transaction ({:?}) in confirmation queue.", id);
-		}
+			queue.get(&id).map(|token| token.as_promise()).expect("Token was just inserted.")
+		};
 		// Notify listeners
-		self.notify(QueueMessage::NewRequest(id));
+		self.notify(QueueEvent::NewRequest(id));
-		id
+		res
+
 	}
 
 	fn peek(&self, id: &U256) -> Option<TransactionConfirmation> {
-		self.queue.read().unwrap().get(id).cloned()
+		self.queue.read().unwrap().get(id).map(|token| token.request.clone())
 	}
 
 	fn request_rejected(&self, id: U256) -> Option<TransactionConfirmation> {
 		debug!(target: "own_tx", "Signer: Transaction rejected ({:?}).", id);
-		let o = self.remove(id);
+		self.remove(id, None)
-		self.update_status(id, QueueStatus::Rejected);
-		o
 	}
 
 	fn request_confirmed(&self, id: U256, hash: H256) -> Option<TransactionConfirmation> {
 		debug!(target: "own_tx", "Signer: Transaction confirmed ({:?}).", id);
-		let o = self.remove(id);
+		self.remove(id, Some(hash))
-		self.update_status(id, QueueStatus::Confirmed(hash));
-		o
 	}
 
 	fn requests(&self) -> Vec<TransactionConfirmation> {
 		let queue = self.queue.read().unwrap();
-		queue.values().cloned().collect()
+		queue.values().map(|token| token.request.clone()).collect()
-	}
-
-	fn wait_with_timeout(&self, id: U256) -> Option<H256> {
-		{
-			let mut waiters = self.waiters.write().unwrap();
-			let r = waiters.insert(id, QueueStatus::Waiting);
-			match r {
-				// This is ok, we can have many waiters
-				Some(QueueStatus::Waiting) | None => {},
-				// There already was a response for someone.
-				// The one waiting for it will cleanup, so...
-				Some(v) => {
-					// ... insert old status back
-					waiters.insert(id, v.clone());
-					if let QueueStatus::Confirmed(h) = v {
-						return Some(h);
-					}
-					return None;
-				},
-			}
-		}
-
-		info!(target: "own_tx", "Signer: Awaiting transaction confirmation... ({:?}).", id);
-		// Now wait for a response
-		let deadline = Instant::now() + Duration::from_secs(QUEUE_TIMEOUT_DURATION_SEC);
-		while Instant::now() < deadline {
-			let status = {
-				let waiters = self.waiters.read().unwrap();
-				waiters.get(&id).expect("Only the waiting thread can remove any message.").clone()
-			};
-
-			match status {
-				QueueStatus::Waiting => thread::sleep(Duration::from_millis(50)),
-				QueueStatus::Confirmed(h) => {
-					self.waiters.write().unwrap().remove(&id);
-					return Some(h);
-				},
-				QueueStatus::Rejected => {
-					self.waiters.write().unwrap().remove(&id);
-					return None;
-				},
-			}
-		}
-		// We reached the timeout. Just return `None` and make sure to remove waiting.
-		trace!(target: "own_tx", "Signer: Confirmation timeout reached... ({:?}).", id);
-		self.waiters.write().unwrap().remove(&id);
-		None
 	}
 }
 
@@ -277,7 +305,7 @@ mod test {
 		let q = queue.clone();
 		let handle = thread::spawn(move || {
 			let v = q.add_request(request);
-			q.wait_with_timeout(v).expect("Should return hash")
+			v.wait_with_timeout().expect("Should return hash")
 		});
 
 		let id = U256::from(1);
@@ -307,13 +335,13 @@ mod test {
 				*v = Some(notification);
 			}).expect("Should be closed nicely.")
 		});
-		let v = queue.add_request(request);
+		queue.add_request(request);
 		queue.finish();
 
 		// then
 		handle.join().expect("Thread should finish nicely");
 		let r = received.lock().unwrap().take();
-		assert_eq!(r, Some(QueueMessage::NewRequest(v)));
+		assert_eq!(r, Some(QueueEvent::NewRequest(U256::from(1))));
 	}
 
 	#[test]

rpc/src/v1/impls/eth.rs

@@ -21,13 +21,13 @@ extern crate ethash;
 use std::sync::{Arc, Weak, Mutex};
 use std::ops::Deref;
 use ethsync::{SyncProvider, SyncState};
-use ethminer::{MinerService, ExternalMinerService};
+use ethcore::miner::{MinerService, ExternalMinerService};
 use jsonrpc_core::*;
 use util::numbers::*;
 use util::sha3::*;
 use util::rlp::{encode, decode, UntrustedRlp, View};
 use util::keys::store::AccountProvider;
-use ethcore::client::{BlockChainClient, BlockID, TransactionID, UncleID};
+use ethcore::client::{MiningBlockChainClient, BlockID, TransactionID, UncleID};
 use ethcore::block::IsBlock;
 use ethcore::views::*;
 use ethcore::ethereum::Ethash;
@@ -42,7 +42,7 @@ use serde;
 
 /// Eth rpc implementation.
 pub struct EthClient<C, S, A, M, EM> where
-	C: BlockChainClient,
+	C: MiningBlockChainClient,
 	S: SyncProvider,
 	A: AccountProvider,
 	M: MinerService,
@@ -57,7 +57,7 @@ pub struct EthClient<C, S, A, M, EM> where
 }
 
 impl<C, S, A, M, EM> EthClient<C, S, A, M, EM> where
-	C: BlockChainClient,
+	C: MiningBlockChainClient,
 	S: SyncProvider,
 	A: AccountProvider,
 	M: MinerService,
@@ -222,7 +222,7 @@ fn make_unsupported_err() -> Error {
 }
 
 impl<C, S, A, M, EM> Eth for EthClient<C, S, A, M, EM> where
-	C: BlockChainClient + 'static,
+	C: MiningBlockChainClient + 'static,
 	S: SyncProvider + 'static,
 	A: AccountProvider + 'static,
 	M: MinerService + 'static,
@@ -511,8 +511,8 @@ impl<C, S, A, M, EM> Eth for EthClient<C, S, A, M, EM> where
 			.and_then(|(request, block_number,)| {
 				let signed = try!(self.sign_call(request));
 				let r = match block_number {
-					BlockNumber::Pending => take_weak!(self.miner).call(take_weak!(self.client).deref(), &signed),
+					BlockNumber::Pending => take_weak!(self.miner).call(take_weak!(self.client).deref(), &signed, false),
-					BlockNumber::Latest => take_weak!(self.client).call(&signed),
+					BlockNumber::Latest => take_weak!(self.client).call(&signed, false),
 					_ => panic!("{:?}", block_number),
 				};
 				to_value(&r.map(|e| Bytes(e.output)).unwrap_or(Bytes::new(vec![])))
@@ -524,8 +524,8 @@ impl<C, S, A, M, EM> Eth for EthClient<C, S, A, M, EM> where
 			.and_then(|(request, block_number,)| {
 				let signed = try!(self.sign_call(request));
 				let r = match block_number {
-					BlockNumber::Pending => take_weak!(self.miner).call(take_weak!(self.client).deref(), &signed),
+					BlockNumber::Pending => take_weak!(self.miner).call(take_weak!(self.client).deref(), &signed, false),
-					BlockNumber::Latest => take_weak!(self.client).call(&signed),
+					BlockNumber::Latest => take_weak!(self.client).call(&signed, false),
 					_ => return Err(Error::invalid_params()),
 				};
 				to_value(&r.map(|res| res.gas_used + res.refunded).unwrap_or(From::from(0)))

rpc/src/v1/impls/eth_filter.rs

@@ -21,7 +21,7 @@ use std::sync::{Arc, Weak, Mutex};
 use std::collections::HashSet;
 use jsonrpc_core::*;
 use util::numbers::*;
-use ethminer::MinerService;
+use ethcore::miner::MinerService;
 use ethcore::filter::Filter as EthcoreFilter;
 use ethcore::client::{BlockChainClient, BlockID};
 use v1::traits::EthFilter;

rpc/src/v1/impls/eth_signing.rs

@@ -18,8 +18,8 @@
 
 use std::sync::{Arc, Weak};
 use jsonrpc_core::*;
-use ethminer::MinerService;
+use ethcore::miner::MinerService;
-use ethcore::client::BlockChainClient;
+use ethcore::client::MiningBlockChainClient;
 use util::numbers::*;
 use util::keys::store::AccountProvider;
 use v1::helpers::{SigningQueue, ConfirmationsQueue};
@@ -54,7 +54,7 @@ impl EthSigning for EthSigningQueueClient  {
 			.and_then(|(request, )| {
 				let queue = take_weak!(self.queue);
 				let id = queue.add_request(request);
-				let result = queue.wait_with_timeout(id);
+				let result = id.wait_with_timeout();
 				to_value(&result.unwrap_or_else(H256::new))
 		})
 	}
@@ -62,7 +62,7 @@ impl EthSigning for EthSigningQueueClient  {
 
 /// Implementation of functions that require signing when no trusted signer is used.
 pub struct EthSigningUnsafeClient<C, A, M> where
-	C: BlockChainClient,
+	C: MiningBlockChainClient,
 	A: AccountProvider,
 	M: MinerService {
 	client: Weak<C>,
@@ -71,7 +71,7 @@ pub struct EthSigningUnsafeClient<C, A, M> where
 }
 
 impl<C, A, M> EthSigningUnsafeClient<C, A, M> where
-	C: BlockChainClient,
+	C: MiningBlockChainClient,
 	A: AccountProvider,
 	M: MinerService {
 
@@ -87,7 +87,7 @@ impl<C, A, M> EthSigningUnsafeClient<C, A, M> where
 }
 
 impl<C, A, M> EthSigning for EthSigningUnsafeClient<C, A, M> where
-	C: BlockChainClient + 'static,
+	C: MiningBlockChainClient + 'static,
 	A: AccountProvider + 'static,
 	M: MinerService + 'static {
 

rpc/src/v1/impls/ethcore.rs

@@ -15,37 +15,107 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 //! Ethcore-specific rpc implementation.
-use util::{U256, Address, RotatingLogger};
+use util::{U256, Address, RotatingLogger, FixedHash, Uint};
 use util::network_settings::NetworkSettings;
 use util::misc::version_data;
 use std::sync::{Arc, Weak};
 use std::ops::Deref;
 use std::collections::BTreeMap;
 use jsonrpc_core::*;
-use ethminer::MinerService;
+use ethcore::miner::MinerService;
+use ethcore::transaction::{Transaction as EthTransaction, SignedTransaction, Action};
+use ethcore::client::BlockChainClient;
+use ethcore::trace::VMTrace;
 use v1::traits::Ethcore;
-use v1::types::Bytes;
+use v1::types::{Bytes, CallRequest};
 
 /// Ethcore implementation.
-pub struct EthcoreClient<M>
+pub struct EthcoreClient<C, M> where
-	where M: MinerService {
+	C: BlockChainClient,
+	M: MinerService {
+
+	client: Weak<C>,
 	miner: Weak<M>,
 	logger: Arc<RotatingLogger>,
 	settings: Arc<NetworkSettings>,
 }
 
-impl<M> EthcoreClient<M> where M: MinerService {
+impl<C, M> EthcoreClient<C, M> where C: BlockChainClient, M: MinerService {
 	/// Creates new `EthcoreClient`.
-	pub fn new(miner: &Arc<M>, logger: Arc<RotatingLogger>, settings: Arc<NetworkSettings>) -> Self {
+	pub fn new(client: &Arc<C>, miner: &Arc<M>, logger: Arc<RotatingLogger>, settings: Arc<NetworkSettings>) -> Self {
 		EthcoreClient {
+			client: Arc::downgrade(client),
 			miner: Arc::downgrade(miner),
 			logger: logger,
 			settings: settings,
 		}
 	}
+
+	// TODO: share with eth.rs
+	fn sign_call(&self, request: CallRequest) -> Result<SignedTransaction, Error> {
+		let client = take_weak!(self.client);
+		let miner = take_weak!(self.miner);
+		let from = request.from.unwrap_or(Address::zero());
+		Ok(EthTransaction {
+			nonce: request.nonce.unwrap_or_else(|| client.latest_nonce(&from)),
+			action: request.to.map_or(Action::Create, Action::Call),
+			gas: request.gas.unwrap_or(U256::from(50_000_000)),
+			gas_price: request.gas_price.unwrap_or_else(|| miner.sensible_gas_price()),
+			value: request.value.unwrap_or_else(U256::zero),
+			data: request.data.map_or_else(Vec::new, |d| d.to_vec())
+		}.fake_sign(from))
+	}
 }
 
-impl<M> Ethcore for EthcoreClient<M> where M: MinerService + 'static {
+fn vm_trace_to_object(t: &VMTrace) -> Value {
+	let mut ret = BTreeMap::new();
+	ret.insert("code".to_owned(), to_value(&t.code).unwrap());
+
+	let mut subs = t.subs.iter();
+	let mut next_sub = subs.next();
+
+	let ops = t.operations
+		.iter()
+		.enumerate()
+		.map(|(i, op)| {
+			let mut m = map![
+				"pc".to_owned() => to_value(&op.pc).unwrap(),
+				"cost".to_owned() => match op.gas_cost <= U256::from(!0u64) {
+					true => to_value(&op.gas_cost.low_u64()),
+					false => to_value(&op.gas_cost),
+				}.unwrap()
+			];
+			if let Some(ref ex) = op.executed {
+				let mut em = map![
+					"used".to_owned() => to_value(&ex.gas_used.low_u64()).unwrap(),
+					"push".to_owned() => to_value(&ex.stack_push).unwrap()
+				];
+				if let Some(ref md) = ex.mem_diff {
+					em.insert("mem".to_owned(), Value::Object(map![
+						"off".to_owned() => to_value(&md.offset).unwrap(),
+						"data".to_owned() => to_value(&md.data).unwrap()
+					]));
+				}
+				if let Some(ref sd) = ex.store_diff {
+					em.insert("store".to_owned(), Value::Object(map![
+						"key".to_owned() => to_value(&sd.location).unwrap(),
+						"val".to_owned() => to_value(&sd.value).unwrap()
+					]));
+				}
+				m.insert("ex".to_owned(), Value::Object(em));
+			}
+			if next_sub.is_some() && next_sub.unwrap().parent_step == i {
+				m.insert("sub".to_owned(), vm_trace_to_object(next_sub.unwrap()));
+				next_sub = subs.next();
+			}
+			Value::Object(m)
+		})
+		.collect::<Vec<_>>();
+	ret.insert("ops".to_owned(), Value::Array(ops));
+	Value::Object(ret)
+}
+
+impl<C, M> Ethcore for EthcoreClient<C, M> where C: BlockChainClient + 'static, M: MinerService + 'static {
 
 	fn set_min_gas_price(&self, params: Params) -> Result<Value, Error> {
 		from_params::<(U256,)>(params).and_then(|(gas_price,)| {
@@ -135,4 +205,19 @@ impl<M> Ethcore for EthcoreClient<M> where M: MinerService + 'static {
 		let version = version_data();
 		to_value(&Bytes::new(version))
 	}
+
+	fn vm_trace_call(&self, params: Params) -> Result<Value, Error> {
+		trace!(target: "jsonrpc", "vm_trace_call: {:?}", params);
+		from_params(params)
+			.and_then(|(request,)| {
+				let signed = try!(self.sign_call(request));
+				let r = take_weak!(self.client).call(&signed, true);
+				if let Ok(executed) = r {
+					if let Some(vm_trace) = executed.vm_trace {
+						return Ok(vm_trace_to_object(&vm_trace));
+					}
+				}
+				Ok(Value::Null)
+			})
+	}
 }

rpc/src/v1/impls/mod.rs

@@ -52,15 +52,15 @@ pub use self::traces::TracesClient;
 pub use self::rpc::RpcClient;
 
 use v1::types::TransactionRequest;
-use ethminer::{AccountDetails, MinerService};
+use ethcore::miner::{AccountDetails, MinerService};
-use ethcore::client::BlockChainClient;
+use ethcore::client::MiningBlockChainClient;
 use ethcore::transaction::{Action, SignedTransaction, Transaction};
 use util::numbers::*;
 use util::rlp::encode;
 use util::bytes::ToPretty;
 
 fn dispatch_transaction<C, M>(client: &C, miner: &M, signed_transaction: SignedTransaction) -> H256
-	where C: BlockChainClient, M: MinerService {
+	where C: MiningBlockChainClient, M: MinerService {
 	let hash = signed_transaction.hash();
 
 	let import = miner.import_own_transaction(client, signed_transaction, |a: &Address| {
@@ -74,7 +74,7 @@ fn dispatch_transaction<C, M>(client: &C, miner: &M, signed_transaction: SignedT
 }
 
 fn sign_and_dispatch<C, M>(client: &C, miner: &M, request: TransactionRequest, secret: H256) -> H256
-	where C: BlockChainClient, M: MinerService {
+	where C: MiningBlockChainClient, M: MinerService {
 
 	let signed_transaction = {
 		Transaction {

rpc/src/v1/impls/personal.rs

@@ -22,19 +22,19 @@ use v1::types::TransactionRequest;
 use v1::impls::sign_and_dispatch;
 use util::keys::store::AccountProvider;
 use util::numbers::*;
-use ethcore::client::BlockChainClient;
+use ethcore::client::MiningBlockChainClient;
-use ethminer::MinerService;
+use ethcore::miner::MinerService;
 
 /// Account management (personal) rpc implementation.
 pub struct PersonalClient<A, C, M>
-	where A: AccountProvider, C: BlockChainClient, M: MinerService {
+	where A: AccountProvider, C: MiningBlockChainClient, M: MinerService {
 	accounts: Weak<A>,
 	client: Weak<C>,
 	miner: Weak<M>,
 }
 
 impl<A, C, M> PersonalClient<A, C, M>
-	where A: AccountProvider, C: BlockChainClient, M: MinerService {
+	where A: AccountProvider, C: MiningBlockChainClient, M: MinerService {
 	/// Creates new PersonalClient
 	pub fn new(store: &Arc<A>, client: &Arc<C>, miner: &Arc<M>) -> Self {
 		PersonalClient {
@@ -46,7 +46,7 @@ impl<A, C, M> PersonalClient<A, C, M>
 }
 
 impl<A: 'static, C: 'static, M: 'static> Personal for PersonalClient<A, C, M>
-	where A: AccountProvider, C: BlockChainClient, M: MinerService {
+	where A: AccountProvider, C: MiningBlockChainClient, M: MinerService {
 	fn accounts(&self, _: Params) -> Result<Value, Error> {
 		let store = take_weak!(self.accounts);
 		match store.accounts() {

rpc/src/v1/impls/personal_signer.rs

@@ -24,12 +24,12 @@ use v1::impls::sign_and_dispatch;
 use v1::helpers::{SigningQueue, ConfirmationsQueue};
 use util::keys::store::AccountProvider;
 use util::numbers::*;
-use ethcore::client::BlockChainClient;
+use ethcore::client::MiningBlockChainClient;
-use ethminer::MinerService;
+use ethcore::miner::MinerService;
 
 /// Transactions confirmation (personal) rpc implementation.
 pub struct SignerClient<A, C, M>
-	where A: AccountProvider, C: BlockChainClient, M: MinerService {
+	where A: AccountProvider, C: MiningBlockChainClient, M: MinerService {
 	queue: Weak<ConfirmationsQueue>,
 	accounts: Weak<A>,
 	client: Weak<C>,
@@ -37,7 +37,7 @@ pub struct SignerClient<A, C, M>
 }
 
 impl<A: 'static, C: 'static, M: 'static> SignerClient<A, C, M>
-	where A: AccountProvider, C: BlockChainClient, M: MinerService {
+	where A: AccountProvider, C: MiningBlockChainClient, M: MinerService {
 
 	/// Create new instance of signer client.
 	pub fn new(store: &Arc<A>, client: &Arc<C>, miner: &Arc<M>, queue: &Arc<ConfirmationsQueue>) -> Self {
@@ -51,7 +51,7 @@ impl<A: 'static, C: 'static, M: 'static> SignerClient<A, C, M>
 }
 
 impl<A: 'static, C: 'static, M: 'static> PersonalSigner for SignerClient<A, C, M>
-	where A: AccountProvider, C: BlockChainClient, M: MinerService {
+	where A: AccountProvider, C: MiningBlockChainClient, M: MinerService {
 
 	fn transactions_to_confirm(&self, _params: Params) -> Result<Value, Error> {
 		let queue = take_weak!(self.queue);

rpc/src/v1/tests/eth.rs

@@ -19,13 +19,13 @@ use std::collections::HashMap;
 use std::sync::Arc;
 use std::str::FromStr;
 
+use ethcore::client::{BlockChainClient, Client, ClientConfig};
 use ethcore::ids::BlockID;
-use ethcore::client::{Client, BlockChainClient, ClientConfig};
 use ethcore::spec::{Genesis, Spec};
 use ethcore::block::Block;
 use ethcore::views::BlockView;
 use ethcore::ethereum;
-use ethminer::{Miner, MinerService, ExternalMiner};
+use ethcore::miner::{MinerService, ExternalMiner, Miner};
 use devtools::RandomTempPath;
 use util::Hashable;
 use util::io::IoChannel;
@@ -68,8 +68,8 @@ fn make_spec(chain: &BlockChain) -> Spec {
 }
 
 struct EthTester {
-	_miner: Arc<MinerService>,
 	client: Arc<Client>,
+	_miner: Arc<MinerService>,
 	accounts: Arc<TestAccountProvider>,
 	handler: IoHandler,
 }
@@ -96,10 +96,10 @@ impl EthTester {
 		where F: Fn() -> Spec {
 
 		let dir = RandomTempPath::new();
-		let client = Client::new(ClientConfig::default(), spec_provider(), dir.as_path(), IoChannel::disconnected()).unwrap();
-		let sync_provider = sync_provider();
 		let account_provider = account_provider();
 		let miner_service = miner_service(spec_provider(), account_provider.clone());
+		let client = Client::new(ClientConfig::default(), spec_provider(), dir.as_path(), miner_service.clone(), IoChannel::disconnected()).unwrap();
+		let sync_provider = sync_provider();
 		let external_miner = Arc::new(ExternalMiner::default());
 
 		let eth_client = EthClient::new(

rpc/src/v1/tests/helpers/miner_service.rs

@@ -19,11 +19,11 @@
 use util::{Address, H256, Bytes, U256, FixedHash, Uint};
 use util::standard::*;
 use ethcore::error::{Error, ExecutionError};
-use ethcore::client::{BlockChainClient, Executed};
+use ethcore::client::{MiningBlockChainClient, Executed};
 use ethcore::block::{ClosedBlock, IsBlock};
 use ethcore::transaction::SignedTransaction;
 use ethcore::receipt::Receipt;
-use ethminer::{MinerService, MinerStatus, AccountDetails, TransactionImportResult};
+use ethcore::miner::{MinerService, MinerStatus, AccountDetails, TransactionImportResult};
 
 /// Test miner service.
 pub struct TestMinerService {
@@ -132,7 +132,7 @@ impl MinerService for TestMinerService {
 	}
 
 	/// Imports transactions to transaction queue.
-	fn import_own_transaction<T>(&self, chain: &BlockChainClient, transaction: SignedTransaction, _fetch_account: T) ->
+	fn import_own_transaction<T>(&self, chain: &MiningBlockChainClient, transaction: SignedTransaction, _fetch_account: T) ->
 		Result<TransactionImportResult, Error>
 		where T: Fn(&Address) -> AccountDetails {
 
@@ -154,21 +154,21 @@ impl MinerService for TestMinerService {
 	}
 
 	/// Removes all transactions from the queue and restart mining operation.
-	fn clear_and_reset(&self, _chain: &BlockChainClient) {
+	fn clear_and_reset(&self, _chain: &MiningBlockChainClient) {
 		unimplemented!();
 	}
 
 	/// Called when blocks are imported to chain, updates transactions queue.
-	fn chain_new_blocks(&self, _chain: &BlockChainClient, _imported: &[H256], _invalid: &[H256], _enacted: &[H256], _retracted: &[H256]) {
+	fn chain_new_blocks(&self, _chain: &MiningBlockChainClient, _imported: &[H256], _invalid: &[H256], _enacted: &[H256], _retracted: &[H256]) {
 		unimplemented!();
 	}
 
 	/// New chain head event. Restart mining operation.
-	fn update_sealing(&self, _chain: &BlockChainClient) {
+	fn update_sealing(&self, _chain: &MiningBlockChainClient) {
 		unimplemented!();
 	}
 
-	fn map_sealing_work<F, T>(&self, _chain: &BlockChainClient, _f: F) -> Option<T> where F: FnOnce(&ClosedBlock) -> T {
+	fn map_sealing_work<F, T>(&self, _chain: &MiningBlockChainClient, _f: F) -> Option<T> where F: FnOnce(&ClosedBlock) -> T {
 		unimplemented!();
 	}
 
@@ -194,29 +194,29 @@ impl MinerService for TestMinerService {
 
 	/// Submit `seal` as a valid solution for the header of `pow_hash`.
 	/// Will check the seal, but not actually insert the block into the chain.
-	fn submit_seal(&self, _chain: &BlockChainClient, _pow_hash: H256, _seal: Vec<Bytes>) -> Result<(), Error> {
+	fn submit_seal(&self, _chain: &MiningBlockChainClient, _pow_hash: H256, _seal: Vec<Bytes>) -> Result<(), Error> {
 		unimplemented!();
 	}
 
-	fn balance(&self, _chain: &BlockChainClient, address: &Address) -> U256 {
+	fn balance(&self, _chain: &MiningBlockChainClient, address: &Address) -> U256 {
 		self.latest_closed_block.lock().unwrap().as_ref().map_or_else(U256::zero, |b| b.block().fields().state.balance(address).clone())
 	}
 
-	fn call(&self, _chain: &BlockChainClient, _t: &SignedTransaction) -> Result<Executed, ExecutionError> {
+	fn call(&self, _chain: &MiningBlockChainClient, _t: &SignedTransaction, _vm_tracing: bool) -> Result<Executed, ExecutionError> {
 		unimplemented!();
 	}
 
-	fn storage_at(&self, _chain: &BlockChainClient, address: &Address, position: &H256) -> H256 {
+	fn storage_at(&self, _chain: &MiningBlockChainClient, address: &Address, position: &H256) -> H256 {
 		self.latest_closed_block.lock().unwrap().as_ref().map_or_else(H256::default, |b| b.block().fields().state.storage_at(address, position).clone())
 	}
 
-	fn nonce(&self, _chain: &BlockChainClient, address: &Address) -> U256 {
+	fn nonce(&self, _chain: &MiningBlockChainClient, address: &Address) -> U256 {
 		// we assume all transactions are in a pending block, ignoring the
 		// reality of gas limits.
 		self.last_nonce(address).unwrap_or(U256::zero())
 	}
 
-	fn code(&self, _chain: &BlockChainClient, address: &Address) -> Option<Bytes> {
+	fn code(&self, _chain: &MiningBlockChainClient, address: &Address) -> Option<Bytes> {
 		self.latest_closed_block.lock().unwrap().as_ref().map_or(None, |b| b.block().fields().state.code(address).clone())
 	}
 

rpc/src/v1/tests/mocked/eth.rs

@@ -25,7 +25,7 @@ use ethcore::client::{TestBlockChainClient, EachBlockWith, Executed, Transaction
 use ethcore::log_entry::{LocalizedLogEntry, LogEntry};
 use ethcore::receipt::LocalizedReceipt;
 use ethcore::transaction::{Transaction, Action};
-use ethminer::{ExternalMiner, MinerService};
+use ethcore::miner::{ExternalMiner, MinerService};
 use ethsync::SyncState;
 use v1::{Eth, EthClient, EthSigning, EthSigningUnsafeClient};
 use v1::tests::helpers::{TestSyncProvider, Config, TestMinerService};
@@ -365,7 +365,7 @@ fn rpc_eth_pending_transaction_by_hash() {
 		tester.miner.pending_transactions.lock().unwrap().insert(H256::zero(), tx);
 	}
 
-	let response = r#"{"jsonrpc":"2.0","result":{"blockHash":null,"blockNumber":null,"from":"0x0f65fe9276bc9a24ae7083ae28e2660ef72df99e","gas":"0x5208","gasPrice":"0x01","hash":"0x41df922fd0d4766fcc02e161f8295ec28522f329ae487f14d811e4b64c8d6e31","input":"0x","nonce":"0x00","to":"0x095e7baea6a6c7c4c2dfeb977efac326af552d87","transactionIndex":null,"value":"0x0a"},"id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":{"blockHash":null,"blockNumber":null,"creates":null,"from":"0x0f65fe9276bc9a24ae7083ae28e2660ef72df99e","gas":"0x5208","gasPrice":"0x01","hash":"0x41df922fd0d4766fcc02e161f8295ec28522f329ae487f14d811e4b64c8d6e31","input":"0x","nonce":"0x00","to":"0x095e7baea6a6c7c4c2dfeb977efac326af552d87","transactionIndex":null,"value":"0x0a"},"id":1}"#;
 	let request = r#"{
 		"jsonrpc": "2.0",
 		"method": "eth_getTransactionByHash",
@@ -430,6 +430,7 @@ fn rpc_eth_call() {
 		contracts_created: vec![],
 		output: vec![0x12, 0x34, 0xff],
 		trace: None,
+		vm_trace: None,
 	});
 
 	let request = r#"{
@@ -463,6 +464,7 @@ fn rpc_eth_call_default_block() {
 		contracts_created: vec![],
 		output: vec![0x12, 0x34, 0xff],
 		trace: None,
+		vm_trace: None,
 	});
 
 	let request = r#"{
@@ -495,6 +497,7 @@ fn rpc_eth_estimate_gas() {
 		contracts_created: vec![],
 		output: vec![0x12, 0x34, 0xff],
 		trace: None,
+		vm_trace: None,
 	});
 
 	let request = r#"{
@@ -528,6 +531,7 @@ fn rpc_eth_estimate_gas_default_block() {
 		contracts_created: vec![],
 		output: vec![0x12, 0x34, 0xff],
 		trace: None,
+		vm_trace: None,
 	});
 
 	let request = r#"{

rpc/src/v1/tests/mocked/ethcore.rs

@@ -18,17 +18,23 @@ use std::sync::Arc;
 use std::str::FromStr;
 use jsonrpc_core::IoHandler;
 use v1::{Ethcore, EthcoreClient};
-use ethminer::MinerService;
+use ethcore::client::{TestBlockChainClient};
+use ethcore::miner::MinerService;
 use v1::tests::helpers::TestMinerService;
 use util::numbers::*;
 use rustc_serialize::hex::FromHex;
 use util::log::RotatingLogger;
 use util::network_settings::NetworkSettings;
 
+fn blockchain_client() -> Arc<TestBlockChainClient> {
+	let client = TestBlockChainClient::new();
+	Arc::new(client)
+}
 
 fn miner_service() -> Arc<TestMinerService> {
 	Arc::new(TestMinerService::default())
 }
+
 fn logger() -> Arc<RotatingLogger> {
 	Arc::new(RotatingLogger::new("rpc=trace".to_owned()))
 }
@@ -45,14 +51,15 @@ fn settings() -> Arc<NetworkSettings> {
 	})
 }
 
-fn ethcore_client(miner: &Arc<TestMinerService>) -> EthcoreClient<TestMinerService> {
+fn ethcore_client(client: &Arc<TestBlockChainClient>, miner: &Arc<TestMinerService>) -> EthcoreClient<TestBlockChainClient, TestMinerService> {
-	EthcoreClient::new(&miner, logger(), settings())
+	EthcoreClient::new(&client, &miner, logger(), settings())
 }
 
 #[test]
 fn rpc_ethcore_extra_data() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -68,7 +75,8 @@ fn rpc_ethcore_default_extra_data() {
 	use util::ToPretty;
 
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -81,7 +89,8 @@ fn rpc_ethcore_default_extra_data() {
 #[test]
 fn rpc_ethcore_gas_floor_target() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -94,7 +103,8 @@ fn rpc_ethcore_gas_floor_target() {
 #[test]
 fn rpc_ethcore_min_gas_price() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -107,7 +117,8 @@ fn rpc_ethcore_min_gas_price() {
 #[test]
 fn rpc_ethcore_set_min_gas_price() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -121,7 +132,8 @@ fn rpc_ethcore_set_min_gas_price() {
 #[test]
 fn rpc_ethcore_set_gas_floor_target() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -135,7 +147,8 @@ fn rpc_ethcore_set_gas_floor_target() {
 #[test]
 fn rpc_ethcore_set_extra_data() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -149,7 +162,8 @@ fn rpc_ethcore_set_extra_data() {
 #[test]
 fn rpc_ethcore_set_author() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -163,10 +177,11 @@ fn rpc_ethcore_set_author() {
 #[test]
 fn rpc_ethcore_dev_logs() {
 	let miner = miner_service();
+	let client = blockchain_client();
 	let logger = logger();
 	logger.append("a".to_owned());
 	logger.append("b".to_owned());
-	let ethcore = EthcoreClient::new(&miner, logger.clone(), settings()).to_delegate();
+	let ethcore = EthcoreClient::new(&client, &miner, logger.clone(), settings()).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -179,7 +194,8 @@ fn rpc_ethcore_dev_logs() {
 #[test]
 fn rpc_ethcore_dev_logs_levels() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -191,7 +207,8 @@ fn rpc_ethcore_dev_logs_levels() {
 #[test]
 fn rpc_ethcore_set_transactions_limit() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -205,7 +222,8 @@ fn rpc_ethcore_set_transactions_limit() {
 #[test]
 fn rpc_ethcore_transactions_limit() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -218,7 +236,8 @@ fn rpc_ethcore_transactions_limit() {
 #[test]
 fn rpc_ethcore_net_chain() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -231,7 +250,8 @@ fn rpc_ethcore_net_chain() {
 #[test]
 fn rpc_ethcore_net_max_peers() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -244,7 +264,8 @@ fn rpc_ethcore_net_max_peers() {
 #[test]
 fn rpc_ethcore_net_port() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -257,7 +278,8 @@ fn rpc_ethcore_net_port() {
 #[test]
 fn rpc_ethcore_rpc_settings() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 
@@ -270,7 +292,8 @@ fn rpc_ethcore_rpc_settings() {
 #[test]
 fn rpc_ethcore_node_name() {
 	let miner = miner_service();
-	let ethcore = ethcore_client(&miner).to_delegate();
+	let client = blockchain_client();
+	let ethcore = ethcore_client(&client, &miner).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
 

rpc/src/v1/traits/ethcore.rs

@@ -72,6 +72,8 @@ pub trait Ethcore: Sized + Send + Sync + 'static {
 	/// Returns default extra data
 	fn default_extra_data(&self, _: Params) -> Result<Value, Error>;
 
+	/// Executes the given call and returns the VM trace for it.
+	fn vm_trace_call(&self, _: Params) -> Result<Value, Error>;
 
 	/// Should be used to convert object to io delegate.
 	fn to_delegate(self) -> IoDelegate<Self> {
@@ -95,6 +97,8 @@ pub trait Ethcore: Sized + Send + Sync + 'static {
 		delegate.add_method("ethcore_nodeName", Ethcore::node_name);
 		delegate.add_method("ethcore_defaultExtraData", Ethcore::default_extra_data);
 
+		delegate.add_method("ethcore_vmTraceCall", Ethcore::vm_trace_call);
+
 		delegate
 	}
 }

rpc/src/v1/types/block.rs

@@ -103,7 +103,7 @@ mod tests {
 	fn test_serialize_block_transactions() {
 		let t = BlockTransactions::Full(vec![Transaction::default()]);
 		let serialized = serde_json::to_string(&t).unwrap();
-		assert_eq!(serialized, r#"[{"hash":"0x0000000000000000000000000000000000000000000000000000000000000000","nonce":"0x00","blockHash":null,"blockNumber":null,"transactionIndex":null,"from":"0x0000000000000000000000000000000000000000","to":null,"value":"0x00","gasPrice":"0x00","gas":"0x00","input":"0x"}]"#);
+		assert_eq!(serialized, r#"[{"hash":"0x0000000000000000000000000000000000000000000000000000000000000000","nonce":"0x00","blockHash":null,"blockNumber":null,"transactionIndex":null,"from":"0x0000000000000000000000000000000000000000","to":null,"value":"0x00","gasPrice":"0x00","gas":"0x00","input":"0x","creates":null}]"#);
 
 		let t = BlockTransactions::Hashes(vec![H256::default()]);
 		let serialized = serde_json::to_string(&t).unwrap();

rpc/src/v1/types/transaction.rs

@@ -15,6 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 use util::numbers::*;
+use ethcore::contract_address;
 use ethcore::transaction::{LocalizedTransaction, Action, SignedTransaction};
 use v1::types::{Bytes, OptionalValue};
 
@@ -46,7 +47,9 @@ pub struct Transaction {
 	/// Gas
 	pub gas: U256,
 	/// Data
-	pub input: Bytes
+	pub input: Bytes,
+	/// Creates contract
+	pub creates: OptionalValue<Address>,
 }
 
 impl From<LocalizedTransaction> for Transaction {
@@ -65,7 +68,11 @@ impl From<LocalizedTransaction> for Transaction {
 			value: t.value,
 			gas_price: t.gas_price,
 			gas: t.gas,
-			input: Bytes::new(t.data.clone())
+			input: Bytes::new(t.data.clone()),
+			creates: match t.action {
+				Action::Create => OptionalValue::Value(contract_address(&t.sender().unwrap(), &t.nonce)),
+				Action::Call(_) => OptionalValue::Null,
+			},
 		}
 	}
 }
@@ -86,7 +93,11 @@ impl From<SignedTransaction> for Transaction {
 			value: t.value,
 			gas_price: t.gas_price,
 			gas: t.gas,
-			input: Bytes::new(t.data.clone())
+			input: Bytes::new(t.data.clone()),
+			creates: match t.action {
+				Action::Create => OptionalValue::Value(contract_address(&t.sender().unwrap(), &t.nonce)),
+				Action::Call(_) => OptionalValue::Null,
+			},
 		}
 	}
 }
@@ -100,7 +111,7 @@ mod tests {
 	fn test_transaction_serialize() {
 		let t = Transaction::default();
 		let serialized = serde_json::to_string(&t).unwrap();
-		assert_eq!(serialized, r#"{"hash":"0x0000000000000000000000000000000000000000000000000000000000000000","nonce":"0x00","blockHash":null,"blockNumber":null,"transactionIndex":null,"from":"0x0000000000000000000000000000000000000000","to":null,"value":"0x00","gasPrice":"0x00","gas":"0x00","input":"0x"}"#);
+		assert_eq!(serialized, r#"{"hash":"0x0000000000000000000000000000000000000000000000000000000000000000","nonce":"0x00","blockHash":null,"blockNumber":null,"transactionIndex":null,"from":"0x0000000000000000000000000000000000000000","to":null,"value":"0x00","gasPrice":"0x00","gas":"0x00","input":"0x","creates":null}"#);
 	}
 }
 

sync/Cargo.toml

@@ -11,7 +11,6 @@ authors = ["Ethcore <admin@ethcore.io"]
 ethcore-util = { path = "../util" }
 ethcore = { path = "../ethcore" }
 clippy = { version = "0.0.69", optional = true}
-ethminer = { path = "../miner" }
 log = "0.3"
 env_logger = "0.3"
 time = "0.1.34"
@@ -20,4 +19,4 @@ heapsize = "0.3"
 
 [features]
 default = []
-dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethminer/dev"]
+dev = ["clippy", "ethcore/dev", "ethcore-util/dev"]

sync/src/chain.rs

@@ -97,7 +97,6 @@ use ethcore::client::{BlockChainClient, BlockStatus, BlockID, BlockChainInfo};
 use ethcore::error::*;
 use ethcore::transaction::SignedTransaction;
 use ethcore::block::Block;
-use ethminer::{Miner, MinerService, AccountDetails};
 use io::SyncIo;
 use time;
 use super::SyncConfig;
@@ -241,15 +240,13 @@ pub struct ChainSync {
 	imported_this_round: Option<usize>,
 	/// Network ID
 	network_id: U256,
-	/// Miner
-	miner: Arc<Miner>,
 }
 
 type RlpResponseResult = Result<Option<(PacketId, RlpStream)>, PacketDecodeError>;
 
 impl ChainSync {
 	/// Create a new instance of syncing strategy.
-	pub fn new(config: SyncConfig, miner: Arc<Miner>, chain: &BlockChainClient) -> ChainSync {
+	pub fn new(config: SyncConfig, chain: &BlockChainClient) -> ChainSync {
 		let chain = chain.chain_info();
 		let mut sync = ChainSync {
 			state: SyncState::ChainHead,
@@ -265,7 +262,6 @@ impl ChainSync {
 			imported_this_round: None,
 			_max_download_ahead_blocks: max(MAX_HEADERS_TO_REQUEST, config.max_download_ahead_blocks),
 			network_id: config.network_id,
-			miner: miner,
 		};
 		sync.reset();
 		sync
@@ -898,12 +894,7 @@ impl ChainSync {
 			let tx: SignedTransaction = try!(r.val_at(i));
 			transactions.push(tx);
 		}
-		let chain = io.chain();
+		let _ = io.chain().import_transactions(transactions);
-		let fetch_account = |a: &Address| AccountDetails {
-			nonce: chain.latest_nonce(a),
-			balance: chain.latest_balance(a),
-		};
-		let _ = self.miner.import_transactions(transactions, fetch_account);
 		Ok(())
 	}
 
@@ -1226,7 +1217,7 @@ impl ChainSync {
 			return 0;
 		}
 
-		let mut transactions = self.miner.all_transactions();
+		let mut transactions = io.chain().all_transactions();
 		if transactions.is_empty() {
 			return 0;
 		}
@@ -1276,11 +1267,9 @@ impl ChainSync {
 		self.check_resume(io);
 	}
 
-	/// called when block is imported to chain, updates transactions queue and propagates the blocks
+		/// called when block is imported to chain, updates transactions queue and propagates the blocks
-	pub fn chain_new_blocks(&mut self, io: &mut SyncIo, imported: &[H256], invalid: &[H256], enacted: &[H256], retracted: &[H256]) {
+	pub fn chain_new_blocks(&mut self, io: &mut SyncIo, _imported: &[H256], invalid: &[H256], _enacted: &[H256], _retracted: &[H256]) {
 		if io.is_chain_queue_empty() {
-			// Notify miner
-			self.miner.chain_new_blocks(io.chain(), imported, invalid, enacted, retracted);
 			// Propagate latests blocks
 			self.propagate_latest_blocks(io);
 		}
@@ -1289,10 +1278,6 @@ impl ChainSync {
 			self.restart_on_bad_block(io);
 		}
 	}
-
-	pub fn chain_new_head(&mut self, io: &mut SyncIo) {
-		self.miner.update_sealing(io.chain());
-	}
 }
 
 #[cfg(test)]
@@ -1305,8 +1290,7 @@ mod tests {
 	use ethcore::views::BlockView;
 	use ethcore::header::*;
 	use ethcore::client::*;
-	use ethcore::spec::Spec;
+	use ethcore::miner::MinerService;
-	use ethminer::{Miner, MinerService};
 
 	fn get_dummy_block(order: u32, parent_hash: H256) -> Bytes {
 		let mut header = Header::new();
@@ -1480,7 +1464,7 @@ mod tests {
 	}
 
 	fn dummy_sync_with_peer(peer_latest_hash: H256, client: &BlockChainClient) -> ChainSync {
-		let mut sync = ChainSync::new(SyncConfig::default(), Miner::new(false, Spec::new_test()), client);
+		let mut sync = ChainSync::new(SyncConfig::default(), client);
 		sync.peers.insert(0,
 			PeerInfo {
 				protocol_version: 0,
@@ -1711,9 +1695,10 @@ mod tests {
 		{
 			let mut queue = VecDeque::new();
 			let mut io = TestIo::new(&mut client, &mut queue, None);
+			io.chain.miner.chain_new_blocks(io.chain, &[], &[], &[], &good_blocks);
 			sync.chain_new_blocks(&mut io, &[], &[], &[], &good_blocks);
-			assert_eq!(sync.miner.status().transactions_in_future_queue, 0);
+			assert_eq!(io.chain.miner.status().transactions_in_future_queue, 0);
-			assert_eq!(sync.miner.status().transactions_in_pending_queue, 1);
+			assert_eq!(io.chain.miner.status().transactions_in_pending_queue, 1);
 		}
 		// We need to update nonce status (because we say that the block has been imported)
 		for h in &[good_blocks[0]] {
@@ -1724,11 +1709,12 @@ mod tests {
 		{
 			let mut queue = VecDeque::new();
 			let mut io = TestIo::new(&mut client, &mut queue, None);
+			io.chain.miner.chain_new_blocks(io.chain, &[], &[], &good_blocks, &retracted_blocks);
 			sync.chain_new_blocks(&mut io, &[], &[], &good_blocks, &retracted_blocks);
 		}
 
 		// then
-		let status = sync.miner.status();
+		let status = client.miner.status();
 		assert_eq!(status.transactions_in_pending_queue, 1);
 		assert_eq!(status.transactions_in_future_queue, 0);
 	}
@@ -1750,12 +1736,12 @@ mod tests {
 
 		// when
 		sync.chain_new_blocks(&mut io, &[], &[], &[], &good_blocks);
-		assert_eq!(sync.miner.status().transactions_in_future_queue, 0);
+		assert_eq!(io.chain.miner.status().transactions_in_future_queue, 0);
-		assert_eq!(sync.miner.status().transactions_in_pending_queue, 0);
+		assert_eq!(io.chain.miner.status().transactions_in_pending_queue, 0);
 		sync.chain_new_blocks(&mut io, &[], &[], &good_blocks, &retracted_blocks);
 
 		// then
-		let status = sync.miner.status();
+		let status = io.chain.miner.status();
 		assert_eq!(status.transactions_in_pending_queue, 0);
 		assert_eq!(status.transactions_in_future_queue, 0);
 	}

sync/src/io.rs

@@ -14,10 +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/>.
 
-use ethcore::client::BlockChainClient;
 use util::{NetworkContext, PeerId, PacketId,};
 use util::error::UtilError;
 use ethcore::service::SyncMessage;
+use ethcore::client::BlockChainClient;
 
 /// IO interface for the syning handler.
 /// Provides peer connection management and an interface to the blockchain client.

sync/src/lib.rs

@@ -32,21 +32,20 @@
 //! extern crate ethcore_util as util;
 //! extern crate ethcore;
 //! extern crate ethsync;
-//! extern crate ethminer;
 //! use std::env;
 //! use std::sync::Arc;
 //! use util::network::{NetworkService, NetworkConfiguration};
 //! use ethcore::client::{Client, ClientConfig};
 //! use ethsync::{EthSync, SyncConfig};
-//! use ethminer::Miner;
 //! use ethcore::ethereum;
+//! use ethcore::miner::Miner;
 //!
 //! fn main() {
 //! 	let mut service = NetworkService::start(NetworkConfiguration::new()).unwrap();
 //! 	let dir = env::temp_dir();
-//! 	let client = Client::new(ClientConfig::default(), ethereum::new_frontier(), &dir, service.io().channel()).unwrap();
+//! 	let client = Client::new(ClientConfig::default(), ethereum::new_frontier(), &dir, Arc::new(Miner::default()), service.io().channel()).unwrap();
 //! 	let miner = Miner::new(false, ethereum::new_frontier());
-//! 	EthSync::register(&mut service, SyncConfig::default(), client, miner);
+//! 	EthSync::register(&mut service, SyncConfig::default(), client);
 //! }
 //! ```
 
@@ -55,7 +54,6 @@ extern crate log;
 #[macro_use]
 extern crate ethcore_util as util;
 extern crate ethcore;
-extern crate ethminer;
 extern crate env_logger;
 extern crate time;
 extern crate rand;
@@ -69,7 +67,6 @@ use util::TimerToken;
 use util::{U256, ONE_U256};
 use ethcore::client::Client;
 use ethcore::service::SyncMessage;
-use ethminer::Miner;
 use io::NetSyncIo;
 use chain::ChainSync;
 
@@ -115,8 +112,8 @@ pub use self::chain::{SyncStatus, SyncState};
 
 impl EthSync {
 	/// Creates and register protocol with the network service
-	pub fn register(service: &mut NetworkService<SyncMessage>, config: SyncConfig, chain: Arc<Client>, miner: Arc<Miner>) -> Arc<EthSync> {
+	pub fn register(service: &mut NetworkService<SyncMessage>, config: SyncConfig, chain: Arc<Client>) -> Arc<EthSync> {
-		let sync = ChainSync::new(config, miner, chain.deref());
+		let sync = ChainSync::new(config, chain.deref());
 		let sync = Arc::new(EthSync {
 			chain: chain,
 			sync: RwLock::new(sync),
@@ -171,10 +168,6 @@ impl NetworkProtocolHandler<SyncMessage> for EthSync {
 				let mut sync_io = NetSyncIo::new(io, self.chain.deref());
 				self.sync.write().unwrap().chain_new_blocks(&mut sync_io, imported, invalid, enacted, retracted);
 			},
-			SyncMessage::NewChainHead => {
-				let mut sync_io = NetSyncIo::new(io, self.chain.deref());
-				self.sync.write().unwrap().chain_new_head(&mut sync_io);
-			},
 			_ => {/* Ignore other messages */},
 		}
 	}

sync/src/tests/helpers.rs

@@ -16,10 +16,8 @@
 
 use util::*;
 use ethcore::client::{TestBlockChainClient, BlockChainClient};
-use ethcore::spec::Spec;
 use io::SyncIo;
 use chain::ChainSync;
-use ethminer::Miner;
 use ::SyncConfig;
 
 pub struct TestIo<'p> {
@@ -93,7 +91,7 @@ impl TestNet {
 		};
 		for _ in 0..n {
 			let chain = TestBlockChainClient::new();
-			let sync = ChainSync::new(SyncConfig::default(), Miner::new(false, Spec::new_test()), &chain);
+			let sync = ChainSync::new(SyncConfig::default(), &chain);
 			net.peers.push(TestPeer {
 				sync: sync,
 				chain: chain,

test.sh

@@ -10,5 +10,4 @@ cargo test --features ethcore/json-tests $1 \
 	-p ethcore-signer \
 	-p ethcore-dapps \
 	-p parity \
-	-p ethminer \
 	-p bigint

util/Cargo.toml

@@ -25,7 +25,7 @@ elastic-array = "0.4"
 heapsize = "0.3"
 itertools = "0.4"
 crossbeam = "0.2"
-slab = "0.1"
+slab = "0.2"
 sha3 = { path = "sha3" }
 serde = "0.7.0"
 clippy = { version = "0.0.69", optional = true}

util/src/common.rs

@@ -24,6 +24,13 @@ pub use vector::*;
 pub use numbers::*;
 pub use sha3::*;
 
+#[macro_export]
+macro_rules! vec_into {
+	( $( $x:expr ),* ) => {
+		vec![ $( $x.into() ),* ]
+	}
+}
+
 #[macro_export]
 macro_rules! hash_map {
 	() => { HashMap::new() };

util/src/network/connection.rs

@@ -170,16 +170,16 @@ impl Connection {
 		self.token
 	}
 
-	/// Replace socket token
-	pub fn set_token(&mut self, token: StreamToken) {
-		self.token = token;
-	}
-
 	/// Get remote peer address
 	pub fn remote_addr(&self) -> io::Result<SocketAddr> {
 		self.socket.peer_addr()
 	}
 
+	/// Get remote peer address string
+	pub fn remote_addr_str(&self) -> String {
+		self.socket.peer_addr().map(|a| a.to_string()).unwrap_or_else(|_| "Unknown".to_owned())
+	}
+
 	/// Clone this connection. Clears the receiving buffer of the returned connection.
 	pub fn try_clone(&self) -> io::Result<Self> {
 		Ok(Connection {
@@ -196,7 +196,7 @@ impl Connection {
 	/// Register this connection with the IO event loop.
 	pub fn register_socket<Host: Handler>(&self, reg: Token, event_loop: &mut EventLoop<Host>) -> io::Result<()> {
 		trace!(target: "network", "connection register; token={:?}", reg);
-		if let Err(e) = event_loop.register(&self.socket, reg, self.interest, PollOpt::edge() | PollOpt::oneshot()) {
+		if let Err(e) = event_loop.register(&self.socket, reg, self.interest, PollOpt::edge() /* | PollOpt::oneshot() */) { // TODO: oneshot is broken on windows
 			trace!(target: "network", "Failed to register {:?}, {:?}", reg, e);
 		}
 		Ok(())
@@ -205,7 +205,7 @@ impl Connection {
 	/// Update connection registration. Should be called at the end of the IO handler.
 	pub fn update_socket<Host: Handler>(&self, reg: Token, event_loop: &mut EventLoop<Host>) -> io::Result<()> {
 		trace!(target: "network", "connection reregister; token={:?}", reg);
-		event_loop.reregister( &self.socket, reg, self.interest, PollOpt::edge() | PollOpt::oneshot()).or_else(|e| {
+		event_loop.reregister( &self.socket, reg, self.interest, PollOpt::edge() /* | PollOpt::oneshot() */ ).or_else(|e| {  // TODO: oneshot is broken on windows
 			trace!(target: "network", "Failed to reregister {:?}, {:?}", reg, e);
 			Ok(())
 		})
@@ -246,7 +246,7 @@ enum EncryptedConnectionState {
 /// https://github.com/ethereum/devp2p/blob/master/rlpx.md#framing
 pub struct EncryptedConnection {
 	/// Underlying tcp connection
-	connection: Connection,
+	pub connection: Connection,
 	/// Egress data encryptor
 	encoder: CtrMode<AesSafe256Encryptor>,
 	/// Ingress data decryptor
@@ -266,27 +266,6 @@ pub struct EncryptedConnection {
 }
 
 impl EncryptedConnection {
-
-	/// Get socket token
-	pub fn token(&self) -> StreamToken {
-		self.connection.token
-	}
-
-	/// Replace socket token
-	pub fn set_token(&mut self, token: StreamToken) {
-		self.connection.set_token(token);
-	}
-
-	/// Get remote peer address
-	pub fn remote_addr(&self) -> io::Result<SocketAddr> {
-		self.connection.remote_addr()
-	}
-
-	/// Check if this connection has data to be sent.
-	pub fn is_sending(&self) -> bool {
-		self.connection.is_sending()
-	}
-
 	/// Create an encrypted connection out of the handshake. Consumes a handshake object.
 	pub fn new(handshake: &mut Handshake) -> Result<EncryptedConnection, UtilError> {
 		let shared = try!(crypto::ecdh::agree(handshake.ecdhe.secret(), &handshake.remote_ephemeral));
@@ -323,8 +302,10 @@ impl EncryptedConnection {
 		ingress_mac.update(&mac_material);
 		ingress_mac.update(if handshake.originated { &handshake.ack_cipher } else { &handshake.auth_cipher });
 
+		let old_connection = try!(handshake.connection.try_clone());
+		let connection = ::std::mem::replace(&mut handshake.connection, old_connection);
 		let mut enc = EncryptedConnection {
-			connection: try!(handshake.connection.try_clone()),
+			connection: connection,
 			encoder: encoder,
 			decoder: decoder,
 			mac_encoder: mac_encoder,
@@ -463,24 +444,6 @@ impl EncryptedConnection {
 		try!(self.connection.writable());
 		Ok(())
 	}
-
-	/// Register socket with the event lpop. This should be called at the end of the event loop.
-	pub fn register_socket<Host:Handler>(&self, reg: Token, event_loop: &mut EventLoop<Host>) -> Result<(), UtilError> {
-		try!(self.connection.register_socket(reg, event_loop));
-		Ok(())
-	}
-
-	/// Update connection registration. This should be called at the end of the event loop.
-	pub fn update_socket<Host:Handler>(&self, reg: Token, event_loop: &mut EventLoop<Host>) -> Result<(), UtilError> {
-		try!(self.connection.update_socket(reg, event_loop));
-		Ok(())
-	}
-
-	/// Delete connection registration. This should be called at the end of the event loop.
-	pub fn deregister_socket<Host:Handler>(&self, event_loop: &mut EventLoop<Host>) -> Result<(), UtilError> {
-		try!(self.connection.deregister_socket(event_loop));
-		Ok(())
-	}
 }
 
 #[test]

util/src/network/handshake.rs

@@ -16,7 +16,6 @@
 
 use std::sync::Arc;
 use rand::random;
-use mio::*;
 use mio::tcp::*;
 use hash::*;
 use rlp::*;
@@ -102,21 +101,6 @@ impl Handshake {
 		})
 	}
 
-	/// Get id of the remote node if known
-	pub fn id(&self) -> &NodeId {
-		&self.id
-	}
-
-	/// Get stream token id
-	pub fn token(&self) -> StreamToken {
-		self.connection.token()
-	}
-
-	/// Mark this handshake as inactive to be deleted lated.
-	pub fn set_expired(&mut self) {
-		self.expired = true;
-	}
-
 	/// Check if this handshake is expired.
 	pub fn expired(&self) -> bool {
 		self.expired
@@ -177,7 +161,7 @@ impl Handshake {
 	}
 
 	/// Writabe IO handler.
-	pub fn writable<Message>(&mut self, io: &IoContext<Message>, _host: &HostInfo) -> Result<(), UtilError> where Message: Send + Clone {
+	pub fn writable<Message>(&mut self, io: &IoContext<Message>) -> Result<(), UtilError> where Message: Send + Clone {
 		if !self.expired() {
 			io.clear_timer(self.connection.token).unwrap();
 			try!(self.connection.writable());
@@ -188,28 +172,6 @@ impl Handshake {
 		Ok(())
 	}
 
-	/// Register the socket with the event loop
-	pub fn register_socket<Host:Handler<Timeout=Token>>(&self, reg: Token, event_loop: &mut EventLoop<Host>) -> Result<(), UtilError> {
-		if !self.expired() {
-			try!(self.connection.register_socket(reg, event_loop));
-		}
-		Ok(())
-	}
-
-	/// Update socket registration with the event loop.
-	pub fn update_socket<Host:Handler<Timeout=Token>>(&self, reg: Token, event_loop: &mut EventLoop<Host>) -> Result<(), UtilError> {
-		if !self.expired() {
-			try!(self.connection.update_socket(reg, event_loop));
-		}
-		Ok(())
-	}
-
-	/// Delete registration
-	pub fn deregister_socket<Host:Handler>(&self, event_loop: &mut EventLoop<Host>) -> Result<(), UtilError> {
-		try!(self.connection.deregister_socket(event_loop));
-		Ok(())
-	}
-
 	fn set_auth(&mut self, host_secret: &Secret, sig: &[u8], remote_public: &[u8], remote_nonce: &[u8], remote_version: u64) -> Result<(), UtilError> {
 		self.id.clone_from_slice(remote_public);
 		self.remote_nonce.clone_from_slice(remote_nonce);
@@ -222,7 +184,7 @@ impl Handshake {
 
 	/// Parse, validate and confirm auth message
 	fn read_auth(&mut self, secret: &Secret, data: &[u8]) -> Result<(), UtilError> {
-		trace!(target:"network", "Received handshake auth from {:?}", self.connection.socket.peer_addr());
+		trace!(target:"network", "Received handshake auth from {:?}", self.connection.remote_addr_str());
 		if data.len() != V4_AUTH_PACKET_SIZE {
 			debug!(target:"net", "Wrong auth packet size");
 			return Err(From::from(NetworkError::BadProtocol));
@@ -253,7 +215,7 @@ impl Handshake {
 	}
 
 	fn read_auth_eip8(&mut self, secret: &Secret, data: &[u8]) -> Result<(), UtilError> {
-		trace!(target:"network", "Received EIP8 handshake auth from {:?}", self.connection.socket.peer_addr());
+		trace!(target:"network", "Received EIP8 handshake auth from {:?}", self.connection.remote_addr_str());
 		self.auth_cipher.extend_from_slice(data);
 		let auth = try!(ecies::decrypt(secret, &self.auth_cipher[0..2], &self.auth_cipher[2..]));
 		let rlp = UntrustedRlp::new(&auth);
@@ -268,7 +230,7 @@ impl Handshake {
 
 	/// Parse and validate ack message
 	fn read_ack(&mut self, secret: &Secret, data: &[u8]) -> Result<(), UtilError> {
-		trace!(target:"network", "Received handshake auth to {:?}", self.connection.socket.peer_addr());
+		trace!(target:"network", "Received handshake auth to {:?}", self.connection.remote_addr_str());
 		if data.len() != V4_ACK_PACKET_SIZE {
 			debug!(target:"net", "Wrong ack packet size");
 			return Err(From::from(NetworkError::BadProtocol));
@@ -296,7 +258,7 @@ impl Handshake {
 	}
 
 	fn read_ack_eip8(&mut self, secret: &Secret, data: &[u8]) -> Result<(), UtilError> {
-		trace!(target:"network", "Received EIP8 handshake auth from {:?}", self.connection.socket.peer_addr());
+		trace!(target:"network", "Received EIP8 handshake auth from {:?}", self.connection.remote_addr_str());
 		self.ack_cipher.extend_from_slice(data);
 		let ack = try!(ecies::decrypt(secret, &self.ack_cipher[0..2], &self.ack_cipher[2..]));
 		let rlp = UntrustedRlp::new(&ack);
@@ -309,7 +271,7 @@ impl Handshake {
 
 	/// Sends auth message
 	fn write_auth(&mut self, secret: &Secret, public: &Public) -> Result<(), UtilError> {
-		trace!(target:"network", "Sending handshake auth to {:?}", self.connection.socket.peer_addr());
+		trace!(target:"network", "Sending handshake auth to {:?}", self.connection.remote_addr_str());
 		let mut data = [0u8; /*Signature::SIZE*/ 65 + /*H256::SIZE*/ 32 + /*Public::SIZE*/ 64 + /*H256::SIZE*/ 32 + 1]; //TODO: use associated constants
 		let len = data.len();
 		{
@@ -336,7 +298,7 @@ impl Handshake {
 
 	/// Sends ack message
 	fn write_ack(&mut self) -> Result<(), UtilError> {
-		trace!(target:"network", "Sending handshake ack to {:?}", self.connection.socket.peer_addr());
+		trace!(target:"network", "Sending handshake ack to {:?}", self.connection.remote_addr_str());
 		let mut data = [0u8; 1 + /*Public::SIZE*/ 64 + /*H256::SIZE*/ 32]; //TODO: use associated constants
 		let len = data.len();
 		{
@@ -355,7 +317,7 @@ impl Handshake {
 
 	/// Sends EIP8 ack message
 	fn write_ack_eip8(&mut self) -> Result<(), UtilError> {
-		trace!(target:"network", "Sending EIP8 handshake ack to {:?}", self.connection.socket.peer_addr());
+		trace!(target:"network", "Sending EIP8 handshake ack to {:?}", self.connection.remote_addr_str());
 		let mut rlp = RlpStream::new_list(3);
 		rlp.append(self.ecdhe.public());
 		rlp.append(&self.nonce);

util/src/network/host.rs

@@ -18,6 +18,7 @@ use std::net::{SocketAddr};
 use std::collections::{HashMap};
 use std::str::{FromStr};
 use std::sync::*;
+use std::sync::atomic::{AtomicUsize, Ordering as AtomicOrdering};
 use std::ops::*;
 use std::cmp::min;
 use std::path::{Path, PathBuf};
@@ -31,7 +32,6 @@ use misc::version;
 use crypto::*;
 use sha3::Hashable;
 use rlp::*;
-use network::handshake::Handshake;
 use network::session::{Session, SessionData};
 use error::*;
 use io::*;
@@ -44,8 +44,7 @@ use network::ip_utils::{map_external_address, select_public_address};
 
 type Slab<T> = ::slab::Slab<T, usize>;
 
-const _DEFAULT_PORT: u16 = 30304;
+const MAX_SESSIONS: usize = 1024 + MAX_HANDSHAKES;
-const MAX_SESSIONS: usize = 1024;
 const MAX_HANDSHAKES: usize = 80;
 const MAX_HANDSHAKES_PER_ROUND: usize = 32;
 const MAINTENANCE_TIMEOUT: u64 = 1000;
@@ -115,18 +114,17 @@ impl NetworkConfiguration {
 }
 
 // Tokens
-const TCP_ACCEPT: usize = LAST_HANDSHAKE + 1;
+const TCP_ACCEPT: usize = SYS_TIMER + 1;
-const IDLE: usize = LAST_HANDSHAKE + 2;
+const IDLE: usize = SYS_TIMER + 2;
-const DISCOVERY: usize = LAST_HANDSHAKE + 3;
+const DISCOVERY: usize = SYS_TIMER + 3;
-const DISCOVERY_REFRESH: usize = LAST_HANDSHAKE + 4;
+const DISCOVERY_REFRESH: usize = SYS_TIMER + 4;
-const DISCOVERY_ROUND: usize = LAST_HANDSHAKE + 5;
+const DISCOVERY_ROUND: usize = SYS_TIMER + 5;
-const INIT_PUBLIC: usize = LAST_HANDSHAKE + 6;
+const INIT_PUBLIC: usize = SYS_TIMER + 6;
-const NODE_TABLE: usize = LAST_HANDSHAKE + 7;
+const NODE_TABLE: usize = SYS_TIMER + 7;
 const FIRST_SESSION: usize = 0;
 const LAST_SESSION: usize = FIRST_SESSION + MAX_SESSIONS - 1;
-const FIRST_HANDSHAKE: usize = LAST_SESSION + 1;
+const USER_TIMER: usize = LAST_SESSION + 256;
-const LAST_HANDSHAKE: usize = FIRST_HANDSHAKE + MAX_HANDSHAKES - 1;
+const SYS_TIMER: usize = LAST_SESSION + 1;
-const USER_TIMER: usize = LAST_HANDSHAKE + 256;
 
 /// Protocol handler level packet id
 pub type PacketId = u8;
@@ -306,7 +304,6 @@ impl HostInfo {
 }
 
 type SharedSession = Arc<Mutex<Session>>;
-type SharedHandshake = Arc<Mutex<Handshake>>;
 
 #[derive(Copy, Clone)]
 struct ProtocolTimer {
@@ -318,7 +315,6 @@ struct ProtocolTimer {
 pub struct Host<Message> where Message: Send + Sync + Clone {
 	pub info: RwLock<HostInfo>,
 	tcp_listener: Mutex<TcpListener>,
-	handshakes: Arc<RwLock<Slab<SharedHandshake>>>,
 	sessions: Arc<RwLock<Slab<SharedSession>>>,
 	discovery: Mutex<Option<Discovery>>,
 	nodes: RwLock<NodeTable>,
@@ -327,6 +323,7 @@ pub struct Host<Message> where Message: Send + Sync + Clone {
 	timer_counter: RwLock<usize>,
 	stats: Arc<NetworkStats>,
 	pinned_nodes: Vec<NodeId>,
+	num_sessions: AtomicUsize,
 }
 
 impl<Message> Host<Message> where Message: Send + Sync + Clone {
@@ -370,7 +367,6 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 			}),
 			discovery: Mutex::new(None),
 			tcp_listener: Mutex::new(tcp_listener),
-			handshakes: Arc::new(RwLock::new(Slab::new_starting_at(FIRST_HANDSHAKE, MAX_HANDSHAKES))),
 			sessions: Arc::new(RwLock::new(Slab::new_starting_at(FIRST_SESSION, MAX_SESSIONS))),
 			nodes: RwLock::new(NodeTable::new(path)),
 			handlers: RwLock::new(HashMap::new()),
@@ -378,6 +374,7 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 			timer_counter: RwLock::new(USER_TIMER),
 			stats: Arc::new(NetworkStats::default()),
 			pinned_nodes: Vec::new(),
+			num_sessions: AtomicUsize::new(0),
 		};
 
 		let boot_nodes = host.info.read().unwrap().config.boot_nodes.clone();
@@ -477,19 +474,19 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 	}
 
 	fn have_session(&self, id: &NodeId) -> bool {
-		self.sessions.read().unwrap().iter().any(|e| e.lock().unwrap().info.id.eq(&id))
+		self.sessions.read().unwrap().iter().any(|e| e.lock().unwrap().info.id == Some(id.clone()))
 	}
 
 	fn session_count(&self) -> usize {
-		self.sessions.read().unwrap().count()
+		self.num_sessions.load(AtomicOrdering::Relaxed)
 	}
 
 	fn connecting_to(&self, id: &NodeId) -> bool {
-		self.handshakes.read().unwrap().iter().any(|e| e.lock().unwrap().id.eq(&id))
+		self.sessions.read().unwrap().iter().any(|e| e.lock().unwrap().id() == Some(id))
 	}
 
 	fn handshake_count(&self) -> usize {
-		self.handshakes.read().unwrap().count()
+		self.sessions.read().unwrap().count() - self.session_count()
 	}
 
 	fn keep_alive(&self, io: &IoContext<NetworkIoMessage<Message>>) {
@@ -565,21 +562,31 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 				}
 			}
 		};
-		self.create_connection(socket, Some(id), io);
+		if let Err(e) = self.create_connection(socket, Some(id), io) {
+			debug!(target: "network", "Can't create connection: {:?}", e);
+		}
 	}
 
 	#[cfg_attr(feature="dev", allow(block_in_if_condition_stmt))]
-	fn create_connection(&self, socket: TcpStream, id: Option<&NodeId>, io: &IoContext<NetworkIoMessage<Message>>) {
+	fn create_connection(&self, socket: TcpStream, id: Option<&NodeId>, io: &IoContext<NetworkIoMessage<Message>>) -> Result<(), UtilError> {
 		let nonce = self.info.write().unwrap().next_nonce();
-		let mut handshakes = self.handshakes.write().unwrap();
+		let mut sessions = self.sessions.write().unwrap();
-		if handshakes.insert_with(|token| {
+		let token = sessions.insert_with_opt(|token| {
-			let mut handshake = Handshake::new(token, id, socket, &nonce, self.stats.clone()).expect("Can't create handshake");
+			match Session::new(io, socket, token, id, &nonce, self.stats.clone(), &self.info.read().unwrap()) {
-			handshake.start(io, &self.info.read().unwrap(), id.is_some()).and_then(|_| io.register_stream(token)).unwrap_or_else (|e| {
+				Ok(s) => Some(Arc::new(Mutex::new(s))),
-				debug!(target: "network", "Handshake create error: {:?}", e);
+				Err(e) => {
-			});
+					debug!(target: "network", "Session create error: {:?}", e);
-			Arc::new(Mutex::new(handshake))
+					None
-		}).is_none() {
+				}
-			debug!(target: "network", "Max handshakes reached");
+			}
+		});
+
+		match token {
+			Some(t) => io.register_stream(t),
+			None => {
+				debug!(target: "network", "Max sessions reached");
+				Ok(())
+			}
 		}
 	}
 
@@ -594,19 +601,11 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 					break
 				},
 			};
-			self.create_connection(socket, None, io);
+			if let Err(e) = self.create_connection(socket, None, io) {
-		}
+				debug!(target: "network", "Can't accept connection: {:?}", e);
-		io.update_registration(TCP_ACCEPT).expect("Error registering TCP listener");
-	}
-
-	fn handshake_writable(&self, token: StreamToken, io: &IoContext<NetworkIoMessage<Message>>) {
-		let handshake = { self.handshakes.read().unwrap().get(token).cloned() };
-		if let Some(handshake) = handshake {
-			let mut h = handshake.lock().unwrap();
-			if let Err(e) = h.writable(io, &self.info.read().unwrap()) {
-				trace!(target: "network", "Handshake write error: {}: {:?}", token, e);
 			}
 		}
+		io.update_registration(TCP_ACCEPT).expect("Error registering TCP listener");
 	}
 
 	fn session_writable(&self, token: StreamToken, io: &IoContext<NetworkIoMessage<Message>>) {
@@ -629,30 +628,6 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 		self.kill_connection(token, io, true);
 	}
 
-	fn handshake_readable(&self, token: StreamToken, io: &IoContext<NetworkIoMessage<Message>>) {
-		let mut create_session = false;
-		let mut kill = false;
-		let handshake = { self.handshakes.read().unwrap().get(token).cloned() };
-		if let Some(handshake) = handshake {
-			let mut h = handshake.lock().unwrap();
-			if let Err(e) = h.readable(io, &self.info.read().unwrap()) {
-				debug!(target: "network", "Handshake read error: {}: {:?}", token, e);
-				kill = true;
-			}
-			if h.done() {
-				create_session = true;
-			}
-		}
-		if kill {
-			self.kill_connection(token, io, true);
-			return;
-		} else if create_session {
-			self.start_session(token, io);
-			return;
-		}
-		io.update_registration(token).unwrap_or_else(|e| debug!(target: "network", "Token registration error: {:?}", e));
-	}
-
 	fn session_readable(&self, token: StreamToken, io: &IoContext<NetworkIoMessage<Message>>) {
 		let mut ready_data: Vec<ProtocolId> = Vec::new();
 		let mut packet_data: Option<(ProtocolId, PacketId, Vec<u8>)> = None;
@@ -662,17 +637,37 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 			let mut s = session.lock().unwrap();
 			match s.readable(io, &self.info.read().unwrap()) {
 				Err(e) => {
-					trace!(target: "network", "Session read error: {}:{} ({:?}) {:?}", token, s.id(), s.remote_addr(), e);
+					trace!(target: "network", "Session read error: {}:{:?} ({:?}) {:?}", token, s.id(), s.remote_addr(), e);
 					match e {
 						UtilError::Network(NetworkError::Disconnect(DisconnectReason::UselessPeer)) |
 						UtilError::Network(NetworkError::Disconnect(DisconnectReason::IncompatibleProtocol)) => {
-							self.nodes.write().unwrap().mark_as_useless(s.id());
+							if let Some(id) = s.id() {
+								self.nodes.write().unwrap().mark_as_useless(id);
+							}
 						}
 						_ => (),
 					}
 					kill = true;
 				},
 				Ok(SessionData::Ready) => {
+					if !s.info.originated {
+						let session_count = self.session_count();
+						let ideal_peers = { self.info.read().unwrap().deref().config.ideal_peers };
+						if session_count >= ideal_peers as usize {
+							s.disconnect(DisconnectReason::TooManyPeers);
+							return;
+						}
+						// Add it no node table
+						if let Ok(address) = s.remote_addr() {
+							let entry = NodeEntry { id: s.id().unwrap().clone(), endpoint: NodeEndpoint { address: address, udp_port: address.port() } };
+							self.nodes.write().unwrap().add_node(Node::new(entry.id.clone(), entry.endpoint.clone()));
+							let mut discovery = self.discovery.lock().unwrap();
+							if let Some(ref mut discovery) = *discovery.deref_mut() {
+								discovery.add_node(entry);
+							}
+						}
+					}
+					self.num_sessions.fetch_add(1, AtomicOrdering::SeqCst);
 					for (p, _) in self.handlers.read().unwrap().iter() {
 						if s.have_capability(p)  {
 							ready_data.push(p);
@@ -697,6 +692,7 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 		}
 		for p in ready_data {
 			let h = self.handlers.read().unwrap().get(p).unwrap().clone();
+			self.stats.inc_sessions();
 			h.connected(&NetworkContext::new(io, p, session.clone(), self.sessions.clone()), &token);
 		}
 		if let Some((p, packet_id, data)) = packet_data {
@@ -706,59 +702,6 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 		io.update_registration(token).unwrap_or_else(|e| debug!(target: "network", "Token registration error: {:?}", e));
 	}
 
-	fn start_session(&self, token: StreamToken, io: &IoContext<NetworkIoMessage<Message>>) {
-		let mut handshakes = self.handshakes.write().unwrap();
-		if handshakes.get(token).is_none() {
-			return;
-		}
-
-		// turn a handshake into a session
-		let mut sessions = self.sessions.write().unwrap();
-		let mut h = handshakes.get_mut(token).unwrap().lock().unwrap();
-		if h.expired {
-			return;
-		}
-		io.deregister_stream(token).expect("Error deleting handshake registration");
-		h.set_expired();
-		let originated = h.originated;
-		let mut session = match Session::new(&mut h, &self.info.read().unwrap()) {
-			Ok(s) => s,
-			Err(e) => {
-				debug!(target: "network", "Session creation error: {:?}", e);
-				return;
-			}
-		};
-		if !originated {
-			let session_count = sessions.count();
-			let ideal_peers = { self.info.read().unwrap().deref().config.ideal_peers };
-			if session_count >= ideal_peers as usize {
-				session.disconnect(DisconnectReason::TooManyPeers);
-				return;
-			}
-		}
-		let result = sessions.insert_with(move |session_token| {
-			session.set_token(session_token);
-			io.register_stream(session_token).expect("Error creating session registration");
-			self.stats.inc_sessions();
-			trace!(target: "network", "Creating session {} -> {}:{} ({:?})", token, session_token, session.id(), session.remote_addr());
-			if !originated {
-				// Add it no node table
-				if let Ok(address) = session.remote_addr() {
-					let entry = NodeEntry { id: session.id().clone(), endpoint: NodeEndpoint { address: address, udp_port: address.port() } };
-					self.nodes.write().unwrap().add_node(Node::new(entry.id.clone(), entry.endpoint.clone()));
-					let mut discovery = self.discovery.lock().unwrap();
-					if let Some(ref mut discovery) = *discovery.deref_mut() {
-						discovery.add_node(entry);
-					}
-				}
-			}
-			Arc::new(Mutex::new(session))
-		});
-		if result.is_none() {
-			warn!("Max sessions reached");
-		}
-	}
-
 	fn connection_timeout(&self, token: StreamToken, io: &IoContext<NetworkIoMessage<Message>>) {
 		trace!(target: "network", "Connection timeout: {}", token);
 		self.kill_connection(token, io, true)
@@ -770,17 +713,6 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 		let mut deregister = false;
 		let mut expired_session = None;
 		match token {
-			FIRST_HANDSHAKE ... LAST_HANDSHAKE => {
-				let handshakes = self.handshakes.write().unwrap();
-				if let Some(handshake) = handshakes.get(token).cloned() {
-					let mut handshake = handshake.lock().unwrap();
-					if !handshake.expired() {
-						handshake.set_expired();
-						failure_id = Some(handshake.id().clone());
-						deregister = true;
-					}
-				}
-			},
 			FIRST_SESSION ... LAST_SESSION => {
 				let sessions = self.sessions.write().unwrap();
 				if let Some(session) = sessions.get(token).cloned() {
@@ -790,12 +722,13 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 						if s.is_ready() {
 							for (p, _) in self.handlers.read().unwrap().iter() {
 								if s.have_capability(p)  {
+									self.num_sessions.fetch_sub(1, AtomicOrdering::SeqCst);
 									to_disconnect.push(p);
 								}
 							}
 						}
 						s.set_expired();
-						failure_id = Some(s.id().clone());
+						failure_id = s.id().cloned();
 					}
 					deregister = remote || s.done();
 				}
@@ -821,20 +754,11 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 	fn update_nodes(&self, io: &IoContext<NetworkIoMessage<Message>>, node_changes: TableUpdates) {
 		let mut to_remove: Vec<PeerId> = Vec::new();
 		{
-			{
+			let sessions = self.sessions.write().unwrap();
-				let handshakes = self.handshakes.write().unwrap();
+			for c in sessions.iter() {
-				for c in handshakes.iter() {
+				let s = c.lock().unwrap();
-					let h = c.lock().unwrap();
+				if let Some(id) = s.id() {
-					if node_changes.removed.contains(&h.id()) {
+					if node_changes.removed.contains(id) {
-						to_remove.push(h.token());
-					}
-				}
-			}
-			{
-				let sessions = self.sessions.write().unwrap();
-				for c in sessions.iter() {
-					let s = c.lock().unwrap();
-					if node_changes.removed.contains(&s.id()) {
 						to_remove.push(s.token());
 					}
 				}
@@ -860,7 +784,6 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 		trace!(target: "network", "Hup: {}", stream);
 		match stream {
 			FIRST_SESSION ... LAST_SESSION => self.connection_closed(stream, io),
-			FIRST_HANDSHAKE ... LAST_HANDSHAKE => self.connection_closed(stream, io),
 			_ => warn!(target: "network", "Unexpected hup"),
 		};
 	}
@@ -868,7 +791,6 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 	fn stream_readable(&self, io: &IoContext<NetworkIoMessage<Message>>, stream: StreamToken) {
 		match stream {
 			FIRST_SESSION ... LAST_SESSION => self.session_readable(stream, io),
-			FIRST_HANDSHAKE ... LAST_HANDSHAKE => self.handshake_readable(stream, io),
 			DISCOVERY => {
 				let node_changes = { self.discovery.lock().unwrap().as_mut().unwrap().readable() };
 				if let Some(node_changes) = node_changes {
@@ -884,7 +806,6 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 	fn stream_writable(&self, io: &IoContext<NetworkIoMessage<Message>>, stream: StreamToken) {
 		match stream {
 			FIRST_SESSION ... LAST_SESSION => self.session_writable(stream, io),
-			FIRST_HANDSHAKE ... LAST_HANDSHAKE => self.handshake_writable(stream, io),
 			DISCOVERY => {
 				self.discovery.lock().unwrap().as_mut().unwrap().writable();
 				io.update_registration(DISCOVERY).expect("Error updating discovery registration");
@@ -899,7 +820,6 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 			INIT_PUBLIC => self.init_public_interface(io).unwrap_or_else(|e|
 				warn!("Error initializing public interface: {:?}", e)),
 			FIRST_SESSION ... LAST_SESSION => self.connection_timeout(token, io),
-			FIRST_HANDSHAKE ... LAST_HANDSHAKE => self.connection_timeout(token, io),
 			DISCOVERY_REFRESH => {
 				self.discovery.lock().unwrap().as_mut().unwrap().refresh();
 				io.update_registration(DISCOVERY).expect("Error updating discovery registration");
@@ -966,7 +886,9 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 				let session = { self.sessions.read().unwrap().get(*peer).cloned() };
 				if let Some(session) = session {
 					session.lock().unwrap().disconnect(DisconnectReason::DisconnectRequested);
-					self.nodes.write().unwrap().mark_as_useless(session.lock().unwrap().id());
+					if let Some(id) = session.lock().unwrap().id() {
+						self.nodes.write().unwrap().mark_as_useless(id)
+					}
 				}
 				trace!(target: "network", "Disabling peer {}", peer);
 				self.kill_connection(*peer, io, false);
@@ -987,12 +909,6 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 					session.lock().unwrap().register_socket(reg, event_loop).expect("Error registering socket");
 				}
 			}
-			FIRST_HANDSHAKE ... LAST_HANDSHAKE => {
-				let connection = { self.handshakes.read().unwrap().get(stream).cloned() };
-				if let Some(connection) = connection {
-					connection.lock().unwrap().register_socket(reg, event_loop).expect("Error registering socket");
-				}
-			}
 			DISCOVERY => self.discovery.lock().unwrap().as_ref().unwrap().register_socket(event_loop).expect("Error registering discovery socket"),
 			TCP_ACCEPT => event_loop.register(self.tcp_listener.lock().unwrap().deref(), Token(TCP_ACCEPT), EventSet::all(), PollOpt::edge()).expect("Error registering stream"),
 			_ => warn!("Unexpected stream registration")
@@ -1008,13 +924,6 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 					connections.remove(stream);
 				}
 			}
-			FIRST_HANDSHAKE ... LAST_HANDSHAKE => {
-				let mut connections = self.handshakes.write().unwrap();
-				if let Some(connection) = connections.get(stream).cloned() {
-					connection.lock().unwrap().deregister_socket(event_loop).expect("Error deregistering socket");
-					connections.remove(stream);
-				}
-			}
 			DISCOVERY => (),
 			_ => warn!("Unexpected stream deregistration")
 		}
@@ -1028,12 +937,6 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 					connection.lock().unwrap().update_socket(reg, event_loop).expect("Error updating socket");
 				}
 			}
-			FIRST_HANDSHAKE ... LAST_HANDSHAKE => {
-				let connection = { self.handshakes.read().unwrap().get(stream).cloned() };
-				if let Some(connection) = connection {
-					connection.lock().unwrap().update_socket(reg, event_loop).expect("Error updating socket");
-				}
-			}
 			DISCOVERY => self.discovery.lock().unwrap().as_ref().unwrap().update_registration(event_loop).expect("Error reregistering discovery socket"),
 			TCP_ACCEPT => event_loop.reregister(self.tcp_listener.lock().unwrap().deref(), Token(TCP_ACCEPT), EventSet::all(), PollOpt::edge()).expect("Error reregistering stream"),
 			_ => warn!("Unexpected stream update")

util/src/network/session.rs

@@ -16,15 +16,19 @@
 
 use std::net::SocketAddr;
 use std::io;
+use std::sync::*;
 use mio::*;
+use mio::tcp::*;
 use rlp::*;
-use network::connection::{EncryptedConnection, Packet};
+use hash::*;
+use network::connection::{EncryptedConnection, Packet, Connection};
 use network::handshake::Handshake;
 use error::*;
 use io::{IoContext, StreamToken};
 use network::error::{NetworkError, DisconnectReason};
 use network::host::*;
 use network::node_table::NodeId;
+use network::stats::NetworkStats;
 use time;
 
 const PING_TIMEOUT_SEC: u64 = 30;
@@ -36,14 +40,18 @@ const PING_INTERVAL_SEC: u64 = 30;
 pub struct Session {
 	/// Shared session information
 	pub info: SessionInfo,
-	/// Underlying connection
-	connection: EncryptedConnection,
 	/// Session ready flag. Set after successfull Hello packet exchange
 	had_hello: bool,
 	/// Session is no longer active flag.
 	expired: bool,
 	ping_time_ns: u64,
 	pong_time_ns: Option<u64>,
+	state: State,
+}
+
+enum State {
+	Handshake(Handshake),
+	Session(EncryptedConnection),
 }
 
 /// Structure used to report various session events.
@@ -65,7 +73,7 @@ pub enum SessionData {
 /// Shared session information
 pub struct SessionInfo {
 	/// Peer public key
-	pub id: NodeId,
+	pub id: Option<NodeId>,
 	/// Peer client ID
 	pub client_version: String,
 	/// Peer RLPx protocol version
@@ -74,6 +82,8 @@ pub struct SessionInfo {
 	capabilities: Vec<SessionCapabilityInfo>,
 	/// Peer ping delay in milliseconds
 	pub ping_ms: Option<u64>,
+	/// True if this session was originated by us.
+	pub originated: bool,
 }
 
 #[derive(Debug, PartialEq, Eq)]
@@ -112,31 +122,52 @@ const PACKET_LAST: u8 = 0x7f;
 impl Session {
 	/// Create a new session out of comepleted handshake. This clones the handshake connection object
 	/// and leaves the handhsake in limbo to be deregistered from the event loop.
-	pub fn new(h: &mut Handshake, host: &HostInfo) -> Result<Session, UtilError> {
+	pub fn new<Message>(io: &IoContext<Message>, socket: TcpStream, token: StreamToken, id: Option<&NodeId>,
-		let id = h.id.clone();
+		nonce: &H256, stats: Arc<NetworkStats>, host: &HostInfo) -> Result<Session, UtilError>
-		let connection = try!(EncryptedConnection::new(h));
+		where Message: Send + Clone {
-		let mut session = Session {
+		let originated = id.is_some();
-			connection: connection,
+		let mut handshake = Handshake::new(token, id, socket, &nonce, stats).expect("Can't create handshake");
+		try!(handshake.start(io, host, originated));
+		Ok(Session {
+			state: State::Handshake(handshake),
 			had_hello: false,
 			info: SessionInfo {
-				id: id,
+				id: id.cloned(),
 				client_version: String::new(),
 				protocol_version: 0,
 				capabilities: Vec::new(),
 				ping_ms: None,
+				originated: originated,
 			},
 			ping_time_ns: 0,
 			pong_time_ns: None,
 			expired: false,
+		})
+	}
+
+	fn complete_handshake(&mut self, host: &HostInfo) -> Result<(), UtilError> {
+		let connection = if let State::Handshake(ref mut h) = self.state {
+			self.info.id = Some(h.id.clone());
+			try!(EncryptedConnection::new(h))
+		} else {
+			panic!("Unexpected state");
 		};
-		try!(session.write_hello(host));
+		self.state = State::Session(connection);
-		try!(session.send_ping());
+		try!(self.write_hello(host));
-		Ok(session)
+		try!(self.send_ping());
+		Ok(())
+	}
+
+	fn connection(&self) -> &Connection {
+		match self.state {
+			State::Handshake(ref h) => &h.connection,
+			State::Session(ref s) => &s.connection,
+		}
 	}
 
 	/// Get id of the remote peer
-	pub fn id(&self) -> &NodeId {
+	pub fn id(&self) -> Option<&NodeId> {
-		&self.info.id
+		self.info.id.as_ref()
 	}
 
 	/// Check if session is ready to send/receive data
@@ -151,21 +182,20 @@ impl Session {
 
 	/// Check if this session is expired.
 	pub fn expired(&self) -> bool {
-		self.expired
+		match self.state {
+			State::Handshake(ref h) => h.expired(),
+			_ => self.expired,
+		}
 	}
 
 	/// Check if this session is over and there is nothing to be sent.
 	pub fn done(&self) -> bool {
-		self.expired() && !self.connection.is_sending()
+		self.expired() && !self.connection().is_sending()
-	}
-	/// Replace socket token
-	pub fn set_token(&mut self, token: StreamToken) {
-		self.connection.set_token(token);
 	}
 
 	/// Get remote peer address
 	pub fn remote_addr(&self) -> io::Result<SocketAddr> {
-		self.connection.remote_addr()
+		self.connection().remote_addr()
 	}
 
 	/// Readable IO handler. Returns packet data if available.
@@ -173,15 +203,37 @@ impl Session {
 		if self.expired() {
 			return Ok(SessionData::None)
 		}
-		match try!(self.connection.readable(io)) {
+		let mut create_session = false;
-			Some(data) => Ok(try!(self.read_packet(data, host))),
+		let mut packet_data = None;
-			None => Ok(SessionData::None)
+		match self.state {
+			State::Handshake(ref mut h) => {
+				try!(h.readable(io, host));
+				if h.done() {
+					create_session = true;
+				}
+			}
+			State::Session(ref mut c) => {
+				match try!(c.readable(io)) {
+					data @ Some(_) => packet_data = data,
+					None => return Ok(SessionData::None)
+				}
+			}
 		}
+		if let Some(data) = packet_data {
+			return Ok(try!(self.read_packet(data, host)));
+		}
+		if create_session {
+			try!(self.complete_handshake(host));
+		}
+		Ok(SessionData::None)
 	}
 
 	/// Writable IO handler. Sends pending packets.
 	pub fn writable<Message>(&mut self, io: &IoContext<Message>, _host: &HostInfo) -> Result<(), UtilError> where Message: Send + Sync + Clone {
-		self.connection.writable(io)
+		match self.state {
+			State::Handshake(ref mut h) => h.writable(io),
+			State::Session(ref mut s) => s.writable(io),
+		}
 	}
 
 	/// Checks if peer supports given capability
@@ -194,18 +246,20 @@ impl Session {
 		if self.expired() {
 			return Ok(());
 		}
-		try!(self.connection.register_socket(reg, event_loop));
+		try!(self.connection().register_socket(reg, event_loop));
 		Ok(())
 	}
 
 	/// Update registration with the event loop. Should be called at the end of the IO handler.
 	pub fn update_socket<Host:Handler>(&self, reg:Token, event_loop: &mut EventLoop<Host>) -> Result<(), UtilError> {
-		self.connection.update_socket(reg, event_loop)
+		try!(self.connection().update_socket(reg, event_loop));
+		Ok(())
 	}
 
 	/// Delete registration
 	pub fn deregister_socket<Host:Handler>(&self, event_loop: &mut EventLoop<Host>) -> Result<(), UtilError> {
-		self.connection.deregister_socket(event_loop)
+		try!(self.connection().deregister_socket(event_loop));
+		Ok(())
 	}
 
 	/// Send a protocol packet to peer.
@@ -221,7 +275,7 @@ impl Session {
 		while protocol != self.info.capabilities[i].protocol {
 			i += 1;
 			if i == self.info.capabilities.len() {
-				debug!(target: "net", "Unknown protocol: {:?}", protocol);
+				debug!(target: "network", "Unknown protocol: {:?}", protocol);
 				return Ok(())
 			}
 		}
@@ -229,11 +283,14 @@ impl Session {
 		let mut rlp = RlpStream::new();
 		rlp.append(&(pid as u32));
 		rlp.append_raw(data, 1);
-		self.connection.send_packet(&rlp.out())
+		self.send(rlp)
 	}
 
 	/// Keep this session alive. Returns false if ping timeout happened
 	pub fn keep_alive<Message>(&mut self, io: &IoContext<Message>) -> bool where Message: Send + Sync + Clone {
+		if let State::Handshake(_) = self.state {
+			return true;
+		}
 		let timed_out = if let Some(pong) = self.pong_time_ns {
 			pong - self.ping_time_ns > PING_TIMEOUT_SEC * 1000_000_000
 		} else {
@@ -244,13 +301,13 @@ impl Session {
 			if let Err(e) = self.send_ping() {
 				debug!("Error sending ping message: {:?}", e);
 			}
-			io.update_registration(self.token()).unwrap_or_else(|e| debug!(target: "net", "Session registration error: {:?}", e));
+			io.update_registration(self.token()).unwrap_or_else(|e| debug!(target: "network", "Session registration error: {:?}", e));
 		}
 		!timed_out
 	}
 
 	pub fn token(&self) -> StreamToken {
-		self.connection.token()
+		self.connection().token()
 	}
 
 	fn read_packet(&mut self, packet: Packet, host: &HostInfo) -> Result<SessionData, UtilError> {
@@ -288,7 +345,7 @@ impl Session {
 				while packet_id < self.info.capabilities[i].id_offset {
 					i += 1;
 					if i == self.info.capabilities.len() {
-						debug!(target: "net", "Unknown packet: {:?}", packet_id);
+						debug!(target: "network", "Unknown packet: {:?}", packet_id);
 						return Ok(SessionData::None)
 					}
 				}
@@ -299,7 +356,7 @@ impl Session {
 				Ok(SessionData::Packet { data: packet.data, protocol: protocol, packet_id: pid } )
 			},
 			_ => {
-				debug!(target: "net", "Unknown packet: {:?}", packet_id);
+				debug!(target: "network", "Unknown packet: {:?}", packet_id);
 				Ok(SessionData::None)
 			}
 		}
@@ -314,7 +371,7 @@ impl Session {
 			.append(&host.capabilities)
 			.append(&host.local_endpoint.address.port())
 			.append(host.id());
-		self.connection.send_packet(&rlp.out())
+		self.send(rlp)
 	}
 
 	fn read_hello(&mut self, rlp: &UntrustedRlp, host: &HostInfo) -> Result<(), UtilError> {
@@ -384,11 +441,13 @@ impl Session {
 
 	/// Disconnect this session
 	pub fn disconnect(&mut self, reason: DisconnectReason) -> NetworkError {
-		let mut rlp = RlpStream::new();
+		if let State::Session(_) = self.state {
-		rlp.append(&(PACKET_DISCONNECT as u32));
+			let mut rlp = RlpStream::new();
-		rlp.begin_list(1);
+			rlp.append(&(PACKET_DISCONNECT as u32));
-		rlp.append(&(reason as u32));
+			rlp.begin_list(1);
-		self.connection.send_packet(&rlp.out()).ok();
+			rlp.append(&(reason as u32));
+			self.send(rlp).ok();
+		}
 		NetworkError::Disconnect(reason)
 	}
 
@@ -400,7 +459,15 @@ impl Session {
 	}
 
 	fn send(&mut self, rlp: RlpStream) -> Result<(), UtilError> {
-		self.connection.send_packet(&rlp.out())
+		match self.state {
+			State::Handshake(_) => {
+				warn!(target:"network", "Unexpected send request");
+			},
+			State::Session(ref mut s) => {
+				try!(s.send_packet(&rlp.out()))
+			},
+		}
+		Ok(())
 	}
 }
 

util/src/rlp/rlpstream.rs

@@ -338,6 +338,18 @@ impl<T> Encodable for Vec<T>  where T: Encodable {
 	}
 }
 
+impl<T> Encodable for Option<T>  where T: Encodable {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		match *self {
+			None => { s.begin_list(0); },
+			Some(ref x) => {
+				s.begin_list(1);
+				s.append_internal(x);
+			}
+		}
+	}
+}
+
 impl<T> RlpEncodable for T where T: Encodable {
 	fn rlp_append(&self, s: &mut RlpStream) {
 		Encodable::rlp_append(self, s)

util/src/rlp/untrusted_rlp.rs

@@ -395,7 +395,7 @@ impl<'a> Decoder for BasicDecoder<'a> {
 }
 
 impl<T> Decodable for T where T: FromBytes {
-	fn decode<D>(decoder: &D) -> Result<Self, DecoderError>  where D: Decoder {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
 		decoder.read_value(| bytes | {
 			Ok(try!(T::from_bytes(bytes)))
 		})
@@ -403,13 +403,19 @@ impl<T> Decodable for T where T: FromBytes {
 }
 
 impl<T> Decodable for Vec<T> where T: Decodable {
-	fn decode<D>(decoder: &D) -> Result<Self, DecoderError>  where D: Decoder {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
 		decoder.as_rlp().iter().map(|d| T::decode(&BasicDecoder::new(d))).collect()
 	}
 }
 
+impl<T> Decodable for Option<T> where T: Decodable {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		decoder.as_rlp().iter().map(|d| T::decode(&BasicDecoder::new(d))).collect::<Result<Vec<_>, DecoderError>>().map(|mut a| a.pop())
+	}
+}
+
 impl Decodable for Vec<u8> {
-	fn decode<D>(decoder: &D) -> Result<Self, DecoderError>  where D: Decoder {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
 		decoder.read_value(| bytes | {
 			let mut res = vec![];
 			res.extend_from_slice(bytes);
@@ -418,22 +424,10 @@ impl Decodable for Vec<u8> {
 	}
 }
 
-impl<T> Decodable for Option<T> where T: Decodable {
-	fn decode<D>(decoder: &D) -> Result<Self, DecoderError>  where D: Decoder {
-		decoder.read_value(| bytes | {
-			let res = match bytes.len() {
-				0 => None,
-				_ => Some(try!(T::decode(decoder)))
-			};
-			Ok(res)
-		})
-	}
-}
-
 macro_rules! impl_array_decodable {
 	($index_type:ty, $len:expr ) => (
 		impl<T> Decodable for [T; $len] where T: Decodable {
-			fn decode<D>(decoder: &D) -> Result<Self, DecoderError>  where D: Decoder {
+			fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
 				let decoders = decoder.as_rlp();
 
 				let mut result: [T; $len] = unsafe { ::std::mem::uninitialized() };
@@ -466,7 +460,7 @@ impl_array_decodable_recursive!(
 );
 
 impl<T> RlpDecodable for T where T: Decodable {
-	fn decode<D>(decoder: &D) -> Result<Self, DecoderError>  where D: Decoder {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
 		Decodable::decode(decoder)
 	}
 }
@@ -489,7 +483,7 @@ impl FromBytes for DecodableU8 {
 }
 
 impl RlpDecodable for u8 {
-	fn decode<D>(decoder: &D) -> Result<Self, DecoderError>  where D: Decoder {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
 		let u: DecodableU8 = try!(Decodable::decode(decoder));
 		Ok(u.0)
 	}