Merge branch 'master' into accountdb_migration

2016-07-08 16:14:53 +02:00 · 2016-07-08 16:14:53 +02:00 · aaf9490c91
commit aaf9490c91
parent 171e93752c 57c14eedfa
80 changed files with 830 additions and 27206 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@ -245,6 +245,7 @@ dependencies = [
 "ethcore-devtools 1.3.0",
 "ethcore-ipc 1.3.0",
 "ethcore-ipc-codegen 1.3.0",
+ "ethcore-ipc-nano 1.3.0",
 "ethcore-util 1.3.0",
 "ethjson 0.1.0",
 "ethstore 0.1.0",
@ -256,6 +257,7 @@ dependencies = [
 "rayon 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "semver 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "syntex 0.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@ -281,6 +283,7 @@ dependencies = [
 "serde_codegen 0.7.9 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_json 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "syntex 0.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

@ -330,6 +333,7 @@ dependencies = [
 "ethash 1.3.0",
 "ethcore 1.3.0",
 "ethcore-devtools 1.3.0",
+ "ethcore-ipc 1.3.0",
 "ethcore-util 1.3.0",
 "ethjson 0.1.0",
 "ethsync 1.3.0",
--- a/dapps/Cargo.toml
+++ b/dapps/Cargo.toml
@ -13,6 +13,7 @@ log = "0.3"
 jsonrpc-core = "2.0"
 jsonrpc-http-server = { git = "https://github.com/ethcore/jsonrpc-http-server.git" }
 hyper = { default-features = false, git = "https://github.com/ethcore/hyper" }
+unicase = "1.3"
 url = "1.0"
 rustc-serialize = "0.3"
 serde = "0.7.0"
--- a/dapps/src/api/api.rs
+++ b/dapps/src/api/api.rs
@ -15,20 +15,23 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 use std::sync::Arc;
-use endpoint::{Endpoint, Endpoints, Handler, EndpointPath};
-use api::types::{App, ApiError};
-use api::response::{as_json, as_json_error};
 use hyper::{server, net, Decoder, Encoder, Next};
+use api::types::{App, ApiError};
+use api::response::{as_json, as_json_error, ping_response};
+use handlers::extract_url;
+use endpoint::{Endpoint, Endpoints, Handler, EndpointPath};

 #[derive(Clone)]
 pub struct RestApi {
+	local_domain: String,
 	endpoints: Arc<Endpoints>,
 }

 impl RestApi {
-	pub fn new(endpoints: Arc<Endpoints>) -> Box<Endpoint> {
+	pub fn new(local_domain: String, endpoints: Arc<Endpoints>) -> Box<Endpoint> {
 		Box::new(RestApi {
-			endpoints: endpoints
+			local_domain: local_domain,
+			endpoints: endpoints,
 		})
 	}

@ -59,9 +62,28 @@ struct RestApiRouter {

 impl server::Handler<net::HttpStream> for RestApiRouter {

-	fn on_request(&mut self, _request: server::Request<net::HttpStream>) -> Next {
-		self.handler = as_json(&self.api.list_apps());
-		Next::write()
+	fn on_request(&mut self, request: server::Request<net::HttpStream>) -> Next {
+		let url = extract_url(&request);
+		if url.is_none() {
+			// Just return 404 if we can't parse URL
+			return Next::write();
+		}
+
+		let url = url.expect("Check for None is above; qed");
+		let endpoint = url.path.get(1).map(|v| v.as_str());
+
+		let handler = endpoint.and_then(|v| match v {
+			"apps" => Some(as_json(&self.api.list_apps())),
+			"ping" => Some(ping_response(&self.api.local_domain)),
+			_ => None,
+		});
+
+		// Overwrite default
+		if let Some(h) = handler {
+			self.handler = h;
+		}
+
+		self.handler.on_request(request)
 	}

 	fn on_request_readable(&mut self, decoder: &mut Decoder<net::HttpStream>) -> Next {
--- a/dapps/src/api/response.rs
+++ b/dapps/src/api/response.rs
@ -17,7 +17,7 @@
 use serde::Serialize;
 use serde_json;
 use endpoint::Handler;
-use handlers::ContentHandler;
+use handlers::{ContentHandler, EchoHandler};

 pub fn as_json<T : Serialize>(val: &T) -> Box<Handler> {
 	Box::new(ContentHandler::ok(serde_json::to_string(val).unwrap(), "application/json".to_owned()))
@ -26,3 +26,11 @@ pub fn as_json<T : Serialize>(val: &T) -> Box<Handler> {
 pub fn as_json_error<T : Serialize>(val: &T) -> Box<Handler> {
 	Box::new(ContentHandler::not_found(serde_json::to_string(val).unwrap(), "application/json".to_owned()))
 }
+
+pub fn ping_response(local_domain: &str) -> Box<Handler> {
+	Box::new(EchoHandler::cors(vec![
+		format!("http://{}", local_domain),
+		// Allow CORS calls also for localhost
+		format!("http://{}", local_domain.replace("127.0.0.1", "localhost")),
+	]))
+}
--- a/dapps/src/api/types.rs
+++ b/dapps/src/api/types.rs
@ -19,5 +19,3 @@ include!("types.rs.in");

 #[cfg(not(feature = "serde_macros"))]
 include!(concat!(env!("OUT_DIR"), "/types.rs"));
-
-
--- a/dapps/src/api/types.rs.in
+++ b/dapps/src/api/types.rs.in
@ -48,4 +48,3 @@ pub struct ApiError {
 	pub detail: String,
 }

-
--- a/dapps/src/handlers/echo.rs
+++ b/dapps/src/handlers/echo.rs
@ -0,0 +1,148 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Echo Handler
+
+use std::io::Read;
+use hyper::{header, server, Decoder, Encoder, Next};
+use hyper::method::Method;
+use hyper::net::HttpStream;
+use unicase::UniCase;
+use super::ContentHandler;
+
+#[derive(Debug, PartialEq)]
+/// Type of Cross-Origin request
+enum Cors {
+	/// Not a Cross-Origin request - no headers needed
+	No,
+	/// Cross-Origin request with valid Origin
+	Allowed(String),
+	/// Cross-Origin request with invalid Origin
+	Forbidden,
+}
+
+pub struct EchoHandler {
+	safe_origins: Vec<String>,
+	content: String,
+	cors: Cors,
+	handler: Option<ContentHandler>,
+}
+
+impl EchoHandler {
+
+	pub fn cors(safe_origins: Vec<String>) -> Self {
+		EchoHandler {
+			safe_origins: safe_origins,
+			content: String::new(),
+			cors: Cors::Forbidden,
+			handler: None,
+		}
+	}
+
+	fn cors_header(&self, origin: Option<String>) -> Cors {
+		fn origin_is_allowed(origin: &str, safe_origins: &[String]) -> bool {
+			for safe in safe_origins {
+				if origin.starts_with(safe) {
+					return true;
+				}
+			}
+			false
+		}
+
+		match origin {
+			Some(ref origin) if origin_is_allowed(origin, &self.safe_origins) => {
+				Cors::Allowed(origin.clone())
+			},
+			None => Cors::No,
+			_ => Cors::Forbidden,
+		}
+	}
+}
+
+impl server::Handler<HttpStream> for EchoHandler {
+	fn on_request(&mut self, request: server::Request<HttpStream>) -> Next {
+		let origin = request.headers().get_raw("origin")
+			.and_then(|list| list.get(0))
+			.and_then(|origin| String::from_utf8(origin.clone()).ok());
+
+		self.cors = self.cors_header(origin);
+
+		// Don't even read the payload if origin is forbidden!
+		if let Cors::Forbidden = self.cors {
+			self.handler = Some(ContentHandler::ok(String::new(), "text/plain".into()));
+			Next::write()
+		} else {
+			Next::read()
+		}
+	}
+
+	fn on_request_readable(&mut self, decoder: &mut Decoder<HttpStream>) -> Next {
+		match decoder.read_to_string(&mut self.content) {
+			Ok(0) => {
+				self.handler = Some(ContentHandler::ok(self.content.clone(), "application/json".into()));
+				Next::write()
+			},
+			Ok(_) => Next::read(),
+			Err(e) => match e.kind() {
+				::std::io::ErrorKind::WouldBlock => Next::read(),
+				_ => Next::end(),
+			}
+		}
+	}
+
+	fn on_response(&mut self, res: &mut server::Response) -> Next {
+		if let Cors::Allowed(ref domain) = self.cors {
+			let mut headers = res.headers_mut();
+			headers.set(header::Allow(vec![Method::Options, Method::Post, Method::Get]));
+			headers.set(header::AccessControlAllowHeaders(vec![
+				UniCase("origin".to_owned()),
+				UniCase("content-type".to_owned()),
+				UniCase("accept".to_owned()),
+			]));
+			headers.set(header::AccessControlAllowOrigin::Value(domain.clone()));
+		}
+		self.handler.as_mut().unwrap().on_response(res)
+	}
+
+	fn on_response_writable(&mut self, encoder: &mut Encoder<HttpStream>) -> Next {
+		self.handler.as_mut().unwrap().on_response_writable(encoder)
+	}
+}
+
+#[test]
+fn should_return_correct_cors_value() {
+	// given
+	let safe_origins = vec!["chrome-extension://".to_owned(), "http://localhost:8080".to_owned()];
+	let cut = EchoHandler {
+		safe_origins: safe_origins,
+		content: String::new(),
+		cors: Cors::No,
+		handler: None,
+	};
+
+	// when
+	let res1 = cut.cors_header(Some("http://ethcore.io".into()));
+	let res2 = cut.cors_header(Some("http://localhost:8080".into()));
+	let res3 = cut.cors_header(Some("chrome-extension://deadbeefcafe".into()));
+	let res4 = cut.cors_header(None);
+
+
+	// then
+	assert_eq!(res1, Cors::Forbidden);
+	assert_eq!(res2, Cors::Allowed("http://localhost:8080".into()));
+	assert_eq!(res3, Cors::Allowed("chrome-extension://deadbeefcafe".into()));
+	assert_eq!(res4, Cors::No);
+}
--- a/dapps/src/handlers/mod.rs
+++ b/dapps/src/handlers/mod.rs
@ -17,9 +17,41 @@
 //! Hyper handlers implementations.

 mod auth;
+mod echo;
 mod content;
 mod redirect;

 pub use self::auth::AuthRequiredHandler;
+pub use self::echo::EchoHandler;
 pub use self::content::ContentHandler;
 pub use self::redirect::Redirection;
+
+use url::Url;
+use hyper::{server, header, net, uri};
+
+pub fn extract_url(req: &server::Request<net::HttpStream>) -> Option<Url> {
+	match *req.uri() {
+		uri::RequestUri::AbsoluteUri(ref url) => {
+			match Url::from_generic_url(url.clone()) {
+				Ok(url) => Some(url),
+				_ => None,
+			}
+		},
+		uri::RequestUri::AbsolutePath(ref path) => {
+			// Attempt to prepend the Host header (mandatory in HTTP/1.1)
+			let url_string = match req.headers().get::<header::Host>() {
+				Some(ref host) => {
+					format!("http://{}:{}{}", host.hostname, host.port.unwrap_or(80), path)
+				},
+				None => return None,
+			};
+
+			match Url::parse(&url_string) {
+				Ok(url) => Some(url),
+				_ => None,
+			}
+		},
+		_ => None,
+	}
+}
+
--- a/dapps/src/lib.rs
+++ b/dapps/src/lib.rs
@ -45,8 +45,9 @@

 #[macro_use]
 extern crate log;
-extern crate url;
+extern crate url as url_lib;
 extern crate hyper;
+extern crate unicase;
 extern crate serde;
 extern crate serde_json;
 extern crate jsonrpc_core;
@ -63,6 +64,7 @@ mod handlers;
 mod rpc;
 mod api;
 mod proxypac;
+mod url;

 use std::sync::{Arc, Mutex};
 use std::net::SocketAddr;
@ -121,7 +123,7 @@ impl Server {
 		let special = Arc::new({
 			let mut special = HashMap::new();
 			special.insert(router::SpecialEndpoint::Rpc, rpc::rpc(handler, panic_handler.clone()));
-			special.insert(router::SpecialEndpoint::Api, api::RestApi::new(endpoints.clone()));
+			special.insert(router::SpecialEndpoint::Api, api::RestApi::new(format!("{}", addr), endpoints.clone()));
 			special.insert(router::SpecialEndpoint::Utils, apps::utils());
 			special
 		});
--- a/dapps/src/router/mod.rs
+++ b/dapps/src/router/mod.rs
@ -17,22 +17,18 @@
 //! Router implementation
 //! Processes request handling authorization and dispatching it to proper application.

-mod url;
 pub mod auth;

 use DAPPS_DOMAIN;
 use std::sync::Arc;
 use std::collections::HashMap;
-use url::Host;
-use hyper;
-use hyper::{server, uri, header};
-use hyper::{Next, Encoder, Decoder};
+use url::{Url, Host};
+use hyper::{self, server, Next, Encoder, Decoder};
 use hyper::net::HttpStream;
 use apps;
 use endpoint::{Endpoint, Endpoints, EndpointPath};
-use self::url::Url;
+use handlers::{Redirection, extract_url};
 use self::auth::{Authorization, Authorized};
-use handlers::Redirection;

 /// Special endpoints are accessible on every domain (every dapp)
 #[derive(Debug, PartialEq, Hash, Eq)]
@ -123,32 +119,6 @@ impl<A: Authorization> Router<A> {
 	}
 }

-fn extract_url(req: &server::Request<HttpStream>) -> Option<Url> {
-	match *req.uri() {
-		uri::RequestUri::AbsoluteUri(ref url) => {
-			match Url::from_generic_url(url.clone()) {
-				Ok(url) => Some(url),
-				_ => None,
-			}
-		},
-		uri::RequestUri::AbsolutePath(ref path) => {
-			// Attempt to prepend the Host header (mandatory in HTTP/1.1)
-			let url_string = match req.headers().get::<header::Host>() {
-				Some(ref host) => {
-					format!("http://{}:{}{}", host.hostname, host.port.unwrap_or(80), path)
-				},
-				None => return None,
-			};
-
-			match Url::parse(&url_string) {
-				Ok(url) => Some(url),
-				_ => None,
-			}
-		},
-		_ => None,
-	}
-}
-
 fn extract_endpoint(url: &Option<Url>) -> (Option<EndpointPath>, SpecialEndpoint) {
 	fn special_endpoint(url: &Url) -> SpecialEndpoint {
 		if url.path.len() <= 1 {
--- a/dapps/src/router/url.rs
+++ b/dapps/src/router/url.rs
@ -16,14 +16,14 @@

 //! HTTP/HTTPS URL type. Based on URL type from Iron library.

-use url::Host;
-use url::{self};
+use url_lib::{self};
+pub use url_lib::Host;

 /// HTTP/HTTPS URL type for Iron.
 #[derive(PartialEq, Eq, Clone, Debug)]
 pub struct Url {
 	/// Raw url of url
-	pub raw: url::Url,
+	pub raw: url_lib::Url,

 	/// The host field of the URL, probably a domain.
 	pub host: Host,
@ -62,14 +62,14 @@ impl Url {
 	/// See: http://url.spec.whatwg.org/#special-scheme
 	pub fn parse(input: &str) -> Result<Url, String> {
 		// Parse the string using rust-url, then convert.
-		match url::Url::parse(input) {
+		match url_lib::Url::parse(input) {
 			Ok(raw_url) => Url::from_generic_url(raw_url),
 			Err(e) => Err(format!("{}", e))
 		}
 	}

 	/// Create a `Url` from a `rust-url` `Url`.
-	pub fn from_generic_url(raw_url: url::Url) -> Result<Url, String> {
+	pub fn from_generic_url(raw_url: url_lib::Url) -> Result<Url, String> {
 		// Map empty usernames to None.
 		let username = match raw_url.username() {
 			"" => None,
--- a/ethcore/Cargo.toml
+++ b/ethcore/Cargo.toml
@ -31,6 +31,8 @@ bloomchain = "0.1"
 "ethcore-ipc" = { path = "../ipc/rpc" }
 rayon = "0.3.1"
 ethstore = { path = "../ethstore" }
+semver = "0.2"
+ethcore-ipc-nano = { path = "../ipc/nano" }

 [dependencies.hyper]
 git = "https://github.com/ethcore/hyper"
--- a/ethcore/build.rs
+++ b/ethcore/build.rs
@ -30,4 +30,18 @@ fn main() {
 		codegen::register(&mut registry);
 		registry.expand("", &src, &dst).unwrap();
 	}
+
+	// client interface
+	{
+		let src = Path::new("src/client/client.rs");
+		let intermediate = Path::new(&out_dir).join("client.intermediate.rs.in");
+		let mut registry = syntex::Registry::new();
+		codegen::register(&mut registry);
+		registry.expand("", &src, &intermediate).unwrap();
+
+		let dst = Path::new(&out_dir).join("client.ipc.rs");
+		let mut registry = syntex::Registry::new();
+		codegen::register(&mut registry);
+		registry.expand("", &intermediate, &dst).unwrap();
+	}
 }
--- a/ethcore/res/ethereum/frontier.json
+++ b/ethcore/res/ethereum/frontier.json
@ -9,8 +9,7 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0x118c30",
-				"daoRescueSoftFork": false
+				"frontierCompatibilityModeLimit": "0x118c30"
 			}
 		}
 	},
--- a/ethcore/res/ethereum/frontier_dao_rescue.json
+++ b/ethcore/res/ethereum/frontier_dao_rescue.json
--- a/ethcore/res/ethereum/frontier_like_test.json
+++ b/ethcore/res/ethereum/frontier_like_test.json
@ -9,8 +9,7 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0x118c30",
-				"daoRescueSoftFork": false
+				"frontierCompatibilityModeLimit": "0x118c30"
 			}
 		}
 	},
--- a/ethcore/res/ethereum/frontier_like_test_dao_rescue.json
+++ b/ethcore/res/ethereum/frontier_like_test_dao_rescue.json
@ -9,8 +9,7 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0x118c30",
-				"daoRescueSoftFork": true
+				"frontierCompatibilityModeLimit": "0x118c30"
 			}
 		}
 	},
--- a/ethcore/res/ethereum/frontier_test.json
+++ b/ethcore/res/ethereum/frontier_test.json
@ -9,8 +9,7 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0xffffffffffffffff",
-				"daoRescueSoftFork": false
+				"frontierCompatibilityModeLimit": "0xffffffffffffffff"
 			}
 		}
 	},
--- a/ethcore/res/ethereum/homestead_test.json
+++ b/ethcore/res/ethereum/homestead_test.json
@ -9,8 +9,7 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": 0,
-				"daoRescueSoftFork": false
+				"frontierCompatibilityModeLimit": 0
 			}
 		}
 	},
--- a/ethcore/res/ethereum/homestead_test_dao_rescue.json
+++ b/ethcore/res/ethereum/homestead_test_dao_rescue.json
@ -9,8 +9,7 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": 0,
-				"daoRescueSoftFork": true
+				"frontierCompatibilityModeLimit": 0
 			}
 		}
 	},
--- a/ethcore/res/ethereum/morden.json
+++ b/ethcore/res/ethereum/morden.json
@ -9,8 +9,7 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar": "",
-				"frontierCompatibilityModeLimit": "0x789b0",
-				"daoRescueSoftFork": false
+				"frontierCompatibilityModeLimit": "0x789b0"
 			}
 		}
 	},
--- a/ethcore/res/ethereum/olympic.json
+++ b/ethcore/res/ethereum/olympic.json
@ -9,8 +9,7 @@
 				"durationLimit": "0x08",
 				"blockReward": "0x14D1120D7B160000",
 				"registrar": "5e70c0bbcd5636e0f9f9316e9f8633feb64d4050",
-				"frontierCompatibilityModeLimit": "0xffffffffffffffff",
-				"daoRescueSoftFork": false
+				"frontierCompatibilityModeLimit": "0xffffffffffffffff"
 			}
 		}
 	},
--- a/ethcore/src/basic_authority.rs
+++ b/ethcore/src/basic_authority.rs
@ -203,7 +203,6 @@ mod tests {
 			timestamp: 0,
 			difficulty: 0.into(),
 			last_hashes: vec![],
-			dao_rescue_block_gas_limit: None,
 			gas_used: 0.into(),
 			gas_limit: 0.into(),
 		});
@ -254,7 +253,7 @@ mod tests {
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let last_hashes = vec![genesis_header.hash()];
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, None, addr, (3141562.into(), 31415620.into()), vec![]).unwrap();
+		let b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, addr, (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let b = b.close_and_lock();
 		let seal = engine.generate_seal(b.block(), Some(&tap)).unwrap();
 		assert!(b.try_seal(engine.deref(), seal).is_ok());
--- a/ethcore/src/block.rs
+++ b/ethcore/src/block.rs
@ -183,7 +183,6 @@ pub struct OpenBlock<'x> {
 	engine: &'x Engine,
 	vm_factory: &'x EvmFactory,
 	last_hashes: LastHashes,
-	dao_rescue_block_gas_limit: Option<U256>,
 }

 /// Just like `OpenBlock`, except that we've applied `Engine::on_close_block`, finished up the non-seal header fields,
@ -195,7 +194,6 @@ pub struct ClosedBlock {
 	block: ExecutedBlock,
 	uncle_bytes: Bytes,
 	last_hashes: LastHashes,
-	dao_rescue_block_gas_limit: Option<U256>,
 	unclosed_state: State,
 }

@ -227,7 +225,6 @@ impl<'x> OpenBlock<'x> {
 		db: Box<JournalDB>,
 		parent: &Header,
 		last_hashes: LastHashes,
-		dao_rescue_block_gas_limit: Option<U256>,
 		author: Address,
 		gas_range_target: (U256, U256),
 		extra_data: Bytes,
@ -238,7 +235,6 @@ impl<'x> OpenBlock<'x> {
 			engine: engine,
 			vm_factory: vm_factory,
 			last_hashes: last_hashes,
-			dao_rescue_block_gas_limit: dao_rescue_block_gas_limit,
 		};

 		r.block.base.header.parent_hash = parent.hash();
@ -295,7 +291,6 @@ impl<'x> OpenBlock<'x> {
 	/// Get the environment info concerning this block.
 	pub fn env_info(&self) -> EnvInfo {
 		// TODO: memoise.
-		const SOFT_FORK_BLOCK: u64 = 1_800_000;
 		EnvInfo {
 			number: self.block.base.header.number,
 			author: self.block.base.header.author.clone(),
@ -304,7 +299,6 @@ impl<'x> OpenBlock<'x> {
 			last_hashes: self.last_hashes.clone(),		// TODO: should be a reference.
 			gas_used: self.block.receipts.last().map_or(U256::zero(), |r| r.gas_used),
 			gas_limit: self.block.base.header.gas_limit.clone(),
-			dao_rescue_block_gas_limit: if self.block.base.header.number == SOFT_FORK_BLOCK { Some(self.block.base.header.gas_limit) } else { self.dao_rescue_block_gas_limit },
 		}
 	}

@ -351,7 +345,6 @@ impl<'x> OpenBlock<'x> {
 			block: s.block,
 			uncle_bytes: uncle_bytes,
 			last_hashes: s.last_hashes,
-			dao_rescue_block_gas_limit: s.dao_rescue_block_gas_limit,
 			unclosed_state: unclosed_state,
 		}
 	}
@ -411,7 +404,6 @@ impl ClosedBlock {
 			engine: engine,
 			vm_factory: vm_factory,
 			last_hashes: self.last_hashes,
-			dao_rescue_block_gas_limit: self.dao_rescue_block_gas_limit,
 		}
 	}
 }
@ -481,7 +473,6 @@ pub fn enact(
 	db: Box<JournalDB>,
 	parent: &Header,
 	last_hashes: LastHashes,
-	dao_rescue_block_gas_limit: Option<U256>,
 	vm_factory: &EvmFactory,
 	trie_factory: TrieFactory,
 ) -> Result<LockedBlock, Error> {
@ -492,7 +483,7 @@ pub fn enact(
 		}
 	}

-	let mut b = try!(OpenBlock::new(engine, vm_factory, trie_factory, tracing, db, parent, last_hashes, dao_rescue_block_gas_limit, header.author().clone(), (3141562.into(), 31415620.into()), header.extra_data().clone()));
+	let mut b = try!(OpenBlock::new(engine, vm_factory, trie_factory, tracing, db, parent, last_hashes, header.author().clone(), (3141562.into(), 31415620.into()), header.extra_data().clone()));
 	b.set_difficulty(*header.difficulty());
 	b.set_gas_limit(*header.gas_limit());
 	b.set_timestamp(header.timestamp());
@ -510,13 +501,12 @@ pub fn enact_bytes(
 	db: Box<JournalDB>,
 	parent: &Header,
 	last_hashes: LastHashes,
-	dao_rescue_block_gas_limit: Option<U256>,
 	vm_factory: &EvmFactory,
 	trie_factory: TrieFactory,
 ) -> Result<LockedBlock, Error> {
 	let block = BlockView::new(block_bytes);
 	let header = block.header();
-	enact(&header, &block.transactions(), &block.uncles(), engine, tracing, db, parent, last_hashes, dao_rescue_block_gas_limit, vm_factory, trie_factory)
+	enact(&header, &block.transactions(), &block.uncles(), engine, tracing, db, parent, last_hashes, vm_factory, trie_factory)
 }

 /// Enact the block given by `block_bytes` using `engine` on the database `db` with given `parent` block header
@ -528,12 +518,11 @@ pub fn enact_verified(
 	db: Box<JournalDB>,
 	parent: &Header,
 	last_hashes: LastHashes,
-	dao_rescue_block_gas_limit: Option<U256>,
 	vm_factory: &EvmFactory,
 	trie_factory: TrieFactory,
 ) -> Result<LockedBlock, Error> {
 	let view = BlockView::new(&block.bytes);
-	enact(&block.header, &block.transactions, &view.uncles(), engine, tracing, db, parent, last_hashes, dao_rescue_block_gas_limit, vm_factory, trie_factory)
+	enact(&block.header, &block.transactions, &view.uncles(), engine, tracing, db, parent, last_hashes, vm_factory, trie_factory)
 }

 /// Enact the block given by `block_bytes` using `engine` on the database `db` with given `parent` block header. Seal the block aferwards
@ -545,12 +534,11 @@ pub fn enact_and_seal(
 	db: Box<JournalDB>,
 	parent: &Header,
 	last_hashes: LastHashes,
-	dao_rescue_block_gas_limit: Option<U256>,
 	vm_factory: &EvmFactory,
 	trie_factory: TrieFactory,
 ) -> Result<SealedBlock, Error> {
 	let header = BlockView::new(block_bytes).header_view();
-	Ok(try!(try!(enact_bytes(block_bytes, engine, tracing, db, parent, last_hashes, dao_rescue_block_gas_limit, vm_factory, trie_factory)).seal(engine, header.seal())))
+	Ok(try!(try!(enact_bytes(block_bytes, engine, tracing, db, parent, last_hashes, vm_factory, trie_factory)).seal(engine, header.seal())))
 }

 #[cfg(test)]
@ -570,7 +558,7 @@ mod tests {
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let last_hashes = vec![genesis_header.hash()];
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, None, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
+		let b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let b = b.close_and_lock();
 		let _ = b.seal(engine.deref(), vec![]);
 	}
@ -586,7 +574,7 @@ mod tests {
 		let mut db = db_result.take();
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, vec![genesis_header.hash()], None, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap()
+		let b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, vec![genesis_header.hash()], Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap()
 			.close_and_lock().seal(engine.deref(), vec![]).unwrap();
 		let orig_bytes = b.rlp_bytes();
 		let orig_db = b.drain();
@ -594,7 +582,7 @@ mod tests {
 		let mut db_result = get_temp_journal_db();
 		let mut db = db_result.take();
 		spec.ensure_db_good(db.as_hashdb_mut());
-		let e = enact_and_seal(&orig_bytes, engine.deref(), false, db, &genesis_header, vec![genesis_header.hash()], None, &Default::default(), Default::default()).unwrap();
+		let e = enact_and_seal(&orig_bytes, engine.deref(), false, db, &genesis_header, vec![genesis_header.hash()], &Default::default(), Default::default()).unwrap();

 		assert_eq!(e.rlp_bytes(), orig_bytes);

@ -614,7 +602,7 @@ mod tests {
 		let mut db = db_result.take();
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let vm_factory = Default::default();
-		let mut open_block = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, vec![genesis_header.hash()], None, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
+		let mut open_block = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, vec![genesis_header.hash()], Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let mut uncle1_header = Header::new();
 		uncle1_header.extra_data = b"uncle1".to_vec();
 		let mut uncle2_header = Header::new();
@ -629,7 +617,7 @@ mod tests {
 		let mut db_result = get_temp_journal_db();
 		let mut db = db_result.take();
 		spec.ensure_db_good(db.as_hashdb_mut());
-		let e = enact_and_seal(&orig_bytes, engine.deref(), false, db, &genesis_header, vec![genesis_header.hash()], None, &Default::default(), Default::default()).unwrap();
+		let e = enact_and_seal(&orig_bytes, engine.deref(), false, db, &genesis_header, vec![genesis_header.hash()], &Default::default(), Default::default()).unwrap();

 		let bytes = e.rlp_bytes();
 		assert_eq!(bytes, orig_bytes);
--- a/ethcore/src/block_queue.rs
+++ b/ethcore/src/block_queue.rs
@ -28,6 +28,8 @@ use service::*;
 use client::BlockStatus;
 use util::panics::*;

+pub use types::block_queue_info::BlockQueueInfo;
+
 known_heap_size!(0, UnverifiedBlock, VerifyingBlock, PreverifiedBlock);

 const MIN_MEM_LIMIT: usize = 16384;
@ -53,22 +55,6 @@ impl Default for BlockQueueConfig {
 	}
 }

-/// Block queue status
-#[derive(Debug)]
-pub struct BlockQueueInfo {
-	/// Number of queued blocks pending verification
-	pub unverified_queue_size: usize,
-	/// Number of verified queued blocks pending import
-	pub verified_queue_size: usize,
-	/// Number of blocks being verified
-	pub verifying_queue_size: usize,
-	/// Configured maximum number of blocks in the queue
-	pub max_queue_size: usize,
-	/// Configured maximum number of bytes to use
-	pub max_mem_use: usize,
-	/// Heap memory used in bytes
-	pub mem_used: usize,
-}

 impl BlockQueueInfo {
 	/// The total size of the queues.
--- a/ethcore/src/blockchain/block_info.rs
+++ b/ethcore/src/blockchain/block_info.rs
@ -17,8 +17,6 @@
 use util::numbers::{U256,H256};
 use header::BlockNumber;

-use util::bytes::{FromRawBytesVariable, FromBytesError, ToBytesWithMap};
-
 /// Brief info about inserted block.
 #[derive(Clone)]
 pub struct BlockInfo {
@ -54,43 +52,3 @@ pub struct BranchBecomingCanonChainData {
 	/// Hashes of the blocks which were invalidated.
 	pub retracted: Vec<H256>,
 }
-
-impl FromRawBytesVariable for BranchBecomingCanonChainData {
-	fn from_bytes_variable(bytes: &[u8]) -> Result<BranchBecomingCanonChainData, FromBytesError> {
-		type Tuple = (Vec<H256>, Vec<H256>, H256);
-		let (enacted, retracted, ancestor) = try!(Tuple::from_bytes_variable(bytes));
-		Ok(BranchBecomingCanonChainData { ancestor: ancestor, enacted: enacted, retracted: retracted })
-	}
-}
-
-impl FromRawBytesVariable for BlockLocation {
-	fn from_bytes_variable(bytes: &[u8]) -> Result<BlockLocation, FromBytesError> {
-		match bytes[0] {
-			0 => Ok(BlockLocation::CanonChain),
-			1 => Ok(BlockLocation::Branch),
-			2 => Ok(BlockLocation::BranchBecomingCanonChain(
-				try!(BranchBecomingCanonChainData::from_bytes_variable(&bytes[1..bytes.len()])))),
-			_ => Err(FromBytesError::UnknownMarker)
-		}
-	}
-}
-
-impl ToBytesWithMap for BranchBecomingCanonChainData {
-	fn to_bytes_map(&self) -> Vec<u8> {
-		(&self.enacted, &self.retracted, &self.ancestor).to_bytes_map()
-	}
-}
-
-impl ToBytesWithMap for BlockLocation {
-	fn to_bytes_map(&self) -> Vec<u8> {
-		match *self {
-			BlockLocation::CanonChain => vec![0u8],
-			BlockLocation::Branch => vec![1u8],
-			BlockLocation::BranchBecomingCanonChain(ref data) => {
-				let mut bytes = (&data.enacted, &data.retracted, &data.ancestor).to_bytes_map();
-				bytes.insert(0, 2u8);
-				bytes
-			}
-		}
-	}
-}
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@ -14,16 +14,35 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

-//! Blockchain database client.
-
 use std::path::PathBuf;
+use std::collections::{HashSet, HashMap};
+use std::ops::Deref;
+use std::mem;
+use std::collections::VecDeque;
+use std::sync::*;
+use std::path::Path;
+use std::fmt;
+use std::sync::atomic::{AtomicUsize, AtomicBool, Ordering as AtomicOrdering};
 use std::time::Instant;
-use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering as AtomicOrdering};
-use util::*;
+
+// util
+use util::numbers::*;
 use util::panics::*;
+use util::network::*;
+use util::io::*;
+use util::rlp;
+use util::sha3::*;
+use util::{Bytes};
+use util::rlp::{RlpStream, Rlp, UntrustedRlp};
+use util::journaldb;
+use util::journaldb::JournalDB;
+use util::kvdb::*;
+use util::{Applyable, Stream, View, PerfTimer, Itertools, Colour};
+
+// other
 use views::BlockView;
 use error::{ImportError, ExecutionError, BlockError, ImportResult};
-use header::{BlockNumber};
+use header::BlockNumber;
 use state::State;
 use spec::Spec;
 use engine::Engine;
@ -35,24 +54,29 @@ use verification::{PreverifiedBlock, Verifier};
 use block::*;
 use transaction::{LocalizedTransaction, SignedTransaction, Action};
 use blockchain::extras::TransactionAddress;
-use filter::Filter;
+use types::filter::Filter;
 use log_entry::LocalizedLogEntry;
 use block_queue::{BlockQueue, BlockQueueInfo};
 use blockchain::{BlockChain, BlockProvider, TreeRoute, ImportRoute};
-use client::{BlockID, TransactionID, UncleID, TraceId, Mode, ClientConfig, DatabaseCompactionProfile,
-	BlockChainClient, MiningBlockChainClient, TraceFilter, CallAnalytics, TransactionImportError,
-	BlockImportError, TransactionImportResult};
+use client::{BlockID, TransactionID, UncleID, TraceId, ClientConfig,
+	DatabaseCompactionProfile, BlockChainClient, MiningBlockChainClient,
+	TraceFilter, CallAnalytics, BlockImportError, Mode};
 use client::Error as ClientError;
 use env_info::EnvInfo;
 use executive::{Executive, Executed, TransactOptions, contract_address};
 use receipt::LocalizedReceipt;
-pub use blockchain::CacheSize as BlockChainCacheSize;
 use trace::{TraceDB, ImportRequest as TraceImportRequest, LocalizedTrace, Database as TraceDatabase};
 use trace;
+use evm::Factory as EvmFactory;
+use miner::{Miner, MinerService};
+use util::TrieFactory;
+use ipc::IpcConfig;
+use ipc::binary::{BinaryConvertError};
+
+// re-export
 pub use types::blockchain_info::BlockChainInfo;
 pub use types::block_status::BlockStatus;
-use evm::Factory as EvmFactory;
-use miner::{Miner, MinerService, AccountDetails};
+pub use blockchain::CacheSize as BlockChainCacheSize;

 const MAX_TX_QUEUE_SIZE: usize = 4096;
 const MAX_QUEUE_SIZE_TO_SLEEP_ON: usize = 2;
@ -119,6 +143,7 @@ pub struct Client {
 	liveness: AtomicBool,
 	io_channel: IoChannel<NetSyncMessage>,
 	queue_transactions: AtomicUsize,
+	previous_enode: Mutex<Option<String>>,
 }

 const HISTORY: u64 = 1200;
@ -204,6 +229,7 @@ impl Client {
 			miner: miner,
 			io_channel: message_channel,
 			queue_transactions: AtomicUsize::new(0),
+			previous_enode: Mutex::new(None),
 		};
 		Ok(Arc::new(client))
 	}
@ -258,7 +284,7 @@ impl Client {
 		let last_hashes = self.build_last_hashes(header.parent_hash.clone());
 		let db = self.state_db.lock().unwrap().boxed_clone();

-		let enact_result = enact_verified(&block, engine, self.tracedb.tracing_enabled(), db, &parent, last_hashes, self.dao_rescue_block_gas_limit(header.parent_hash.clone()), &self.vm_factory, self.trie_factory.clone());
+		let enact_result = enact_verified(&block, engine, self.tracedb.tracing_enabled(), db, &parent, last_hashes, &self.vm_factory, self.trie_factory.clone());
 		if let Err(e) = enact_result {
 			warn!(target: "client", "Block import failed for #{} ({})\nError: {:?}", header.number(), header.hash(), e);
 			return Err(());
@ -409,12 +435,8 @@ impl Client {
 	pub fn import_queued_transactions(&self, transactions: &[Bytes]) -> usize {
 		let _timer = PerfTimer::new("import_queued_transactions");
 		self.queue_transactions.fetch_sub(transactions.len(), AtomicOrdering::SeqCst);
-		let fetch_account = |a: &Address| AccountDetails {
-			nonce: self.latest_nonce(a),
-			balance: self.latest_balance(a),
-		};
-		let tx = transactions.iter().filter_map(|bytes| UntrustedRlp::new(&bytes).as_val().ok()).collect();
-		let results = self.miner.import_transactions(self, tx, fetch_account);
+		let txs = transactions.iter().filter_map(|bytes| UntrustedRlp::new(&bytes).as_val().ok()).collect();
+		let results = self.miner.import_external_transactions(self, txs);
 		results.len()
 	}

@ -563,8 +585,22 @@ impl Client {
 			}
 		}
 	}
+
+	/// Notify us that the network has been started.
+	pub fn network_started(&self, url: &String) {
+		let mut previous_enode = self.previous_enode.lock().unwrap();
+		if let Some(ref u) = *previous_enode {
+			if u == url {
+				return;
+			}
+		}
+		*previous_enode = Some(url.clone());
+		info!(target: "mode", "Public node URL: {}", url.apply(Colour::White.bold()));
+	}
 }

+#[derive(Ipc)]
+#[ipc(client_ident="RemoteClient")]
 impl BlockChainClient for Client {
 	fn call(&self, t: &SignedTransaction, analytics: CallAnalytics) -> Result<Executed, ExecutionError> {
 		let header = self.block_header(BlockID::Latest).unwrap();
@ -578,7 +614,6 @@ impl BlockChainClient for Client {
 			last_hashes: last_hashes,
 			gas_used: U256::zero(),
 			gas_limit: U256::max_value(),
-			dao_rescue_block_gas_limit: self.dao_rescue_block_gas_limit(view.parent_hash()),
 		};
 		// that's just a copy of the state.
 		let mut state = self.state();
@ -813,7 +848,6 @@ impl BlockChainClient for Client {
 							.collect::<Vec<LocalizedLogEntry>>()
 					})
 					.collect::<Vec<LocalizedLogEntry>>()
-
 			})
 			.collect()
 	}
@ -862,18 +896,6 @@ impl BlockChainClient for Client {
 		self.build_last_hashes(self.chain.best_block_hash())
 	}

-	fn import_transactions(&self, transactions: Vec<SignedTransaction>) -> Vec<Result<TransactionImportResult, TransactionImportError>> {
-		let fetch_account = |a: &Address| AccountDetails {
-			nonce: self.latest_nonce(a),
-			balance: self.latest_balance(a),
-		};
-
-		self.miner.import_transactions(self, transactions, &fetch_account)
-			.into_iter()
-			.map(|res| res.map_err(|e| e.into()))
-			.collect()
-	}
-
 	fn queue_transactions(&self, transactions: Vec<Bytes>) {
 		if self.queue_transactions.load(AtomicOrdering::Relaxed) > MAX_TX_QUEUE_SIZE {
 			debug!("Ignoring {} transactions: queue is full", transactions.len());
@ -908,7 +930,6 @@ impl MiningBlockChainClient for Client {
 			self.state_db.lock().unwrap().boxed_clone(),
 			&self.chain.block_header(&h).expect("h is best block hash: so it's header must exist: qed"),
 			self.build_last_hashes(h.clone()),
-			self.dao_rescue_block_gas_limit(h.clone()),
 			author,
 			gas_range_target,
 			extra_data,
@ -970,3 +991,5 @@ impl MayPanic for Client {
 		self.panic_handler.on_panic(closure);
 	}
 }
+
+impl IpcConfig for Client { }
--- a/ethcore/src/client/mod.rs
+++ b/ethcore/src/client/mod.rs
@ -16,7 +16,6 @@

 //! Blockchain database client.

-mod client;
 mod config;
 mod error;
 mod test_client;
@ -27,7 +26,7 @@ pub use self::config::{Mode, ClientConfig, DatabaseCompactionProfile, BlockQueue
 pub use self::error::Error;
 pub use types::ids::*;
 pub use self::test_client::{TestBlockChainClient, EachBlockWith};
-pub use self::trace::Filter as TraceFilter;
+pub use types::trace_filter::Filter as TraceFilter;
 pub use executive::{Executed, Executive, TransactOptions};
 pub use env_info::{LastHashes, EnvInfo};

@ -42,23 +41,21 @@ use header::{BlockNumber};
 use transaction::{LocalizedTransaction, SignedTransaction};
 use log_entry::LocalizedLogEntry;
 use filter::Filter;
-use views::{HeaderView, BlockView};
+use views::{BlockView};
 use error::{ImportResult, ExecutionError};
 use receipt::LocalizedReceipt;
 use trace::LocalizedTrace;
 use evm::Factory as EvmFactory;
+pub use types::call_analytics::CallAnalytics;
 pub use block_import_error::BlockImportError;
-pub use transaction_import::{TransactionImportResult, TransactionImportError};
+pub use transaction_import::TransactionImportResult;
+pub use transaction_import::TransactionImportError;

-/// Options concerning what analytics we run on the call.
-#[derive(Eq, PartialEq, Default, Clone, Copy, Debug)]
-pub struct CallAnalytics {
-	/// Make a transaction trace.
-	pub transaction_tracing: bool,
-	/// Make a VM trace.
-	pub vm_tracing: bool,
-	/// Make a diff.
-	pub state_diffing: bool,
+pub mod client {
+	//! Blockchain database client.
+
+	#![allow(dead_code, unused_assignments, unused_variables, missing_docs)] // codegen issues
+	include!(concat!(env!("OUT_DIR"), "/client.ipc.rs"));
 }

 /// Blockchain database client. Owns and manages a blockchain and a block queue.
@ -192,9 +189,6 @@ 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, TransactionImportError>>;
-
 	/// Queue transactions for importing.
 	fn queue_transactions(&self, transactions: Vec<Bytes>);

@ -226,28 +220,6 @@ pub trait BlockChainClient : Sync + Send {
 			Err(())
 		}
 	}
-
-	/// Get `Some` gas limit of SOFT_FORK_BLOCK, or `None` if chain is not yet that long.
-	fn dao_rescue_block_gas_limit(&self, chain_hash: H256) -> Option<U256> {
-		const SOFT_FORK_BLOCK: u64 = 1800000;
-		// shortcut if the canon chain is already known.
-		if self.chain_info().best_block_number > SOFT_FORK_BLOCK + 1000 {
-			return self.block_header(BlockID::Number(SOFT_FORK_BLOCK)).map(|header| HeaderView::new(&header).gas_limit());
-		}
-		// otherwise check according to `chain_hash`.
-		if let Some(mut header) = self.block_header(BlockID::Hash(chain_hash)) {
-			if HeaderView::new(&header).number() < SOFT_FORK_BLOCK {
-				None
-			} else {
-				while HeaderView::new(&header).number() != SOFT_FORK_BLOCK {
-					header = self.block_header(BlockID::Hash(HeaderView::new(&header).parent_hash())).expect("chain is complete; parent of chain entry must be in chain; qed");
-				}
-				Some(HeaderView::new(&header).gas_limit())
-			}
-		} else {
-			None
-		}
-	}
 }

 /// Extended client interface used for mining
--- a/ethcore/src/client/test_client.rs
+++ b/ethcore/src/client/test_client.rs
@ -22,7 +22,7 @@ use transaction::{Transaction, LocalizedTransaction, SignedTransaction, Action};
 use blockchain::TreeRoute;
 use client::{BlockChainClient, MiningBlockChainClient, BlockChainInfo, BlockStatus, BlockID,
 	TransactionID, UncleID, TraceId, TraceFilter, LastHashes, CallAnalytics,
-	TransactionImportError, BlockImportError};
+	BlockImportError};
 use header::{Header as BlockHeader, BlockNumber};
 use filter::Filter;
 use log_entry::LocalizedLogEntry;
@ -36,11 +36,9 @@ use spec::Spec;
 use block_queue::BlockQueueInfo;
 use block::{OpenBlock, SealedBlock};
 use executive::Executed;
-use error::{ExecutionError};
+use error::ExecutionError;
 use trace::LocalizedTrace;

-use miner::{TransactionImportResult, AccountDetails};
-
 /// Test client.
 pub struct TestBlockChainClient {
 	/// Blocks.
@ -275,6 +273,10 @@ impl BlockChainClient for TestBlockChainClient {
 		}
 	}

+	fn latest_nonce(&self, address: &Address) -> U256 {
+		self.nonce(address, BlockID::Latest).unwrap()
+	}
+
 	fn code(&self, address: &Address) -> Option<Bytes> {
 		self.code.read().unwrap().get(address).cloned()
 	}
@ -287,6 +289,10 @@ impl BlockChainClient for TestBlockChainClient {
 		}
 	}

+	fn latest_balance(&self, address: &Address) -> U256 {
+		self.balance(address, BlockID::Latest).unwrap()
+	}
+
 	fn storage_at(&self, address: &Address, position: &H256, id: BlockID) -> Option<H256> {
 		if let BlockID::Latest = id {
 			Some(self.storage.read().unwrap().get(&(address.clone(), position.clone())).cloned().unwrap_or_else(H256::new))
@ -488,24 +494,10 @@ impl BlockChainClient for TestBlockChainClient {
 		unimplemented!();
 	}

-	fn import_transactions(&self, transactions: Vec<SignedTransaction>) -> Vec<Result<TransactionImportResult, TransactionImportError>> {
-		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(self, transactions, &fetch_account)
-			.into_iter()
-			.map(|res| res.map_err(|e| e.into()))
-			.collect()
-	}
-
 	fn queue_transactions(&self, transactions: Vec<Bytes>) {
 		// import right here
-		let tx = transactions.into_iter().filter_map(|bytes| UntrustedRlp::new(&bytes).as_val().ok()).collect();
-		self.import_transactions(tx);
+		let txs = transactions.into_iter().filter_map(|bytes| UntrustedRlp::new(&bytes).as_val().ok()).collect();
+		self.miner.import_external_transactions(self, txs);
 	}

 	fn pending_transactions(&self) -> Vec<SignedTransaction> {
--- a/ethcore/src/client/trace.rs
+++ b/ethcore/src/client/trace.rs
@ -1,13 +1,12 @@

 //! Bridge between Tracedb and Blockchain.

-use std::ops::Range;
-use util::{Address, H256};
+use util::{H256};
 use header::BlockNumber;
 use trace::DatabaseExtras as TraceDatabaseExtras;
 use blockchain::{BlockChain, BlockProvider};
 use blockchain::extras::TransactionAddress;
-use super::BlockID;
+pub use types::trace_filter::Filter;

 impl TraceDatabaseExtras for BlockChain {
 	fn block_hash(&self, block_number: BlockNumber) -> Option<H256> {
@ -26,13 +25,3 @@ impl TraceDatabaseExtras for BlockChain {
 			.map(|tx| tx.hash())
 	}
 }
-
-/// Easy to use trace filter.
-pub struct Filter {
-	/// Range of filtering.
-	pub range: Range<BlockID>,
-	/// From address.
-	pub from_address: Vec<Address>,
-	/// To address.
-	pub to_address: Vec<Address>,
-}
--- a/ethcore/src/env_info.rs
+++ b/ethcore/src/env_info.rs
@ -39,9 +39,6 @@ pub struct EnvInfo {
 	pub last_hashes: LastHashes,
 	/// The gas used.
 	pub gas_used: U256,
-
-	/// Block gas limit at DAO rescue block SOFT_FORK_BLOCK or None if not yet there.
-	pub dao_rescue_block_gas_limit: Option<U256>,
 }

 impl Default for EnvInfo {
@ -54,7 +51,6 @@ impl Default for EnvInfo {
 			gas_limit: 0.into(),
 			last_hashes: vec![],
 			gas_used: 0.into(),
-			dao_rescue_block_gas_limit: None,
 		}
 	}
 }
@ -70,7 +66,6 @@ impl From<ethjson::vm::Env> for EnvInfo {
 			timestamp: e.timestamp.into(),
 			last_hashes: (1..cmp::min(number + 1, 257)).map(|i| format!("{}", number - i).as_bytes().sha3()).collect(),
 			gas_used: U256::zero(),
-			dao_rescue_block_gas_limit: None,
 		}
 	}
 }
--- a/ethcore/src/error.rs
+++ b/ethcore/src/error.rs
@ -20,9 +20,9 @@ use util::*;
 use header::BlockNumber;
 use basic_types::LogBloom;
 use client::Error as ClientError;
-pub use types::executed::ExecutionError;
 use ipc::binary::{BinaryConvertError, BinaryConvertable};
 use types::block_import_error::BlockImportError;
+pub use types::executed::ExecutionError;

 #[derive(Debug, PartialEq, Clone)]
 /// Errors concerning transaction processing.
@ -327,7 +327,6 @@ binary_fixed_size!(BlockError);
 binary_fixed_size!(ImportError);
 binary_fixed_size!(TransactionError);

-
 // TODO: uncomment below once https://github.com/rust-lang/rust/issues/27336 sorted.
 /*#![feature(concat_idents)]
 macro_rules! assimilate {
--- a/ethcore/src/ethereum/ethash.rs
+++ b/ethcore/src/ethereum/ethash.rs
@ -39,8 +39,6 @@ pub struct EthashParams {
 	pub registrar: Address,
 	/// Homestead transition block number.
 	pub frontier_compatibility_mode_limit: u64,
-	/// Enable the soft-fork logic.
-	pub dao_rescue_soft_fork: bool,
 }

 impl From<ethjson::spec::EthashParams> for EthashParams {
@ -53,7 +51,6 @@ impl From<ethjson::spec::EthashParams> for EthashParams {
 			block_reward: p.block_reward.into(),
 			registrar: p.registrar.into(),
 			frontier_compatibility_mode_limit: p.frontier_compatibility_mode_limit.into(),
-			dao_rescue_soft_fork: p.dao_rescue_soft_fork.into(),
 		}
 	}
 }
@ -102,11 +99,7 @@ impl Engine for Ethash {
 		if env_info.number < self.ethash_params.frontier_compatibility_mode_limit {
 			Schedule::new_frontier()
 		} else {
-			let mut s = Schedule::new_homestead();
-			if self.ethash_params.dao_rescue_soft_fork {
-				s.reject_dao_transactions = env_info.dao_rescue_block_gas_limit.map_or(false, |x| x <= 4_000_000.into());
-			}
-			s
+			Schedule::new_homestead()
 		}
 	}

@ -325,7 +318,7 @@ mod tests {
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let last_hashes = vec![genesis_header.hash()];
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, None, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
+		let b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let b = b.close();
 		assert_eq!(b.state().balance(&Address::zero()), U256::from_str("4563918244f40000").unwrap());
 	}
@ -340,7 +333,7 @@ mod tests {
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let last_hashes = vec![genesis_header.hash()];
 		let vm_factory = Default::default();
-		let mut b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, None, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
+		let mut b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let mut uncle = Header::new();
 		let uncle_author = address_from_hex("ef2d6d194084c2de36e0dabfce45d046b37d1106");
 		uncle.author = uncle_author.clone();
@ -369,7 +362,6 @@ mod tests {
 			last_hashes: vec![],
 			gas_used: 0.into(),
 			gas_limit: 0.into(),
-			dao_rescue_block_gas_limit: None,
 		});

 		assert!(schedule.stack_limit > 0);
@ -382,7 +374,6 @@ mod tests {
 			last_hashes: vec![],
 			gas_used: 0.into(),
 			gas_limit: 0.into(),
-			dao_rescue_block_gas_limit: None,
 		});

 		assert!(!schedule.have_delegate_call);
--- a/ethcore/src/ethereum/mod.rs
+++ b/ethcore/src/ethereum/mod.rs
@ -33,11 +33,8 @@ use super::spec::*;
 pub fn new_olympic() -> Spec { Spec::load(include_bytes!("../../res/ethereum/olympic.json")) }

 /// Create a new Frontier mainnet chain spec.
-pub fn new_frontier(dao_rescue: bool) -> Spec {
-	Spec::load(match dao_rescue {
-		true => include_bytes!("../../res/ethereum/frontier_dao_rescue.json"),
-		false => include_bytes!("../../res/ethereum/frontier.json"),
-	})
+pub fn new_frontier() -> Spec {
+	Spec::load(include_bytes!("../../res/ethereum/frontier.json"))
 }

 /// Create a new Frontier chain spec as though it never changes to Homestead.
@ -89,7 +86,7 @@ mod tests {

 	#[test]
 	fn frontier() {
-		let frontier = new_frontier(true);
+		let frontier = new_frontier();

 		assert_eq!(frontier.state_root(), H256::from_str("d7f8974fb5ac78d9ac099b9ad5018bedc2ce0a72dad1827a1709da30580f0544").unwrap());
 		let genesis = frontier.genesis_block();
--- a/ethcore/src/externalities.rs
+++ b/ethcore/src/externalities.rs
@ -319,7 +319,6 @@ mod tests {
 			last_hashes: vec![],
 			gas_used: 0.into(),
 			gas_limit: 0.into(),
-			dao_rescue_block_gas_limit: None,
 		}
 	}

--- a/ethcore/src/lib.rs
+++ b/ethcore/src/lib.rs
@ -95,6 +95,8 @@ extern crate rayon;
 extern crate hyper;
 extern crate ethash;
 pub extern crate ethstore;
+extern crate semver;
+extern crate ethcore_ipc_nano as nanoipc;

 #[cfg(test)] extern crate ethcore_devtools as devtools;
 #[cfg(feature = "jit" )] extern crate evmjit;
@ -106,7 +108,6 @@ pub mod block_queue;
 pub mod client;
 pub mod error;
 pub mod ethereum;
-pub mod filter;
 pub mod header;
 pub mod service;
 pub mod trace;
--- a/ethcore/src/miner/miner.rs
+++ b/ethcore/src/miner/miner.rs
@ -20,7 +20,6 @@ use std::time::{Instant, Duration};

 use util::*;
 use util::using_queue::{UsingQueue, GetAction};
-use util::Colour::White;
 use account_provider::AccountProvider;
 use views::{BlockView, HeaderView};
 use client::{MiningBlockChainClient, Executive, Executed, EnvInfo, TransactOptions, BlockID, CallAnalytics};
@ -316,6 +315,19 @@ impl Miner {
 		!have_work
 	}

+	fn add_transactions_to_queue(&self, chain: &MiningBlockChainClient, transactions: Vec<SignedTransaction>, origin: TransactionOrigin, transaction_queue: &mut TransactionQueue) ->
+		Vec<Result<TransactionImportResult, Error>> {
+
+		let fetch_account = |a: &Address| AccountDetails {
+			nonce: chain.latest_nonce(a),
+			balance: chain.latest_balance(a),
+		};
+
+		transactions.into_iter()
+			.map(|tx| transaction_queue.add(tx, &fetch_account, origin))
+			.collect()
+	}
+
 	/// Are we allowed to do a non-mandatory reseal?
 	fn tx_reseal_allowed(&self) -> bool { Instant::now() > *self.next_allowed_reseal.lock().unwrap() }
 }
@ -356,7 +368,6 @@ impl MinerService for Miner {
 					last_hashes: last_hashes,
 					gas_used: U256::zero(),
 					gas_limit: U256::max_value(),
-					dao_rescue_block_gas_limit: chain.dao_rescue_block_gas_limit(header.parent_hash().clone()),
 				};
 				// that's just a copy of the state.
 				let mut state = block.state().clone();
@ -479,27 +490,24 @@ impl MinerService for Miner {
 		self.gas_range_target.read().unwrap().1
 	}

-	fn import_transactions<T>(&self, chain: &MiningBlockChainClient, transactions: Vec<SignedTransaction>, fetch_account: T) ->
-		Vec<Result<TransactionImportResult, Error>>
-		where T: Fn(&Address) -> AccountDetails {
-		let results: Vec<Result<TransactionImportResult, Error>> = {
+	fn import_external_transactions(&self, chain: &MiningBlockChainClient, transactions: Vec<SignedTransaction>) ->
+		Vec<Result<TransactionImportResult, Error>> {
+
 		let mut transaction_queue = self.transaction_queue.lock().unwrap();
-			transactions.into_iter()
-				.map(|tx| transaction_queue.add(tx, &fetch_account, TransactionOrigin::External))
-				.collect()
-		};
+		let results = self.add_transactions_to_queue(chain, transactions, TransactionOrigin::External,
+													 &mut transaction_queue);
+
 		if !results.is_empty() && self.options.reseal_on_external_tx &&	self.tx_reseal_allowed() {
 			self.update_sealing(chain);
 		}
 		results
 	}

-	fn import_own_transaction<T>(
+	fn import_own_transaction(
 		&self,
 		chain: &MiningBlockChainClient,
 		transaction: SignedTransaction,
-		fetch_account: T
-	) -> Result<TransactionImportResult, Error> where T: Fn(&Address) -> AccountDetails {
+	) -> Result<TransactionImportResult, Error> {

 		let hash = transaction.hash();
 		trace!(target: "own_tx", "Importing transaction: {:?}", transaction);
@ -507,7 +515,7 @@ impl MinerService for Miner {
 		let imported = {
 			// Be sure to release the lock before we call enable_and_prepare_sealing
 			let mut transaction_queue = self.transaction_queue.lock().unwrap();
-			let import = transaction_queue.add(transaction, &fetch_account, TransactionOrigin::Local);
+			let import = self.add_transactions_to_queue(chain, vec![transaction], TransactionOrigin::Local, &mut transaction_queue).pop().unwrap();

 			match import {
 				Ok(ref res) => {
@ -646,7 +654,7 @@ impl MinerService for Miner {
 			let n = sealed.header().number();
 			let h = sealed.header().hash();
 			try!(chain.import_sealed_block(sealed));
-			info!(target: "miner", "Mined block imported OK. #{}: {}", paint(White.bold(), format!("{}", n)), paint(White.bold(), h.hex()));
+			info!(target: "miner", "Mined block imported OK. #{}: {}", format!("{}", n).apply(Colour::White.bold()), h.hex().apply(Colour::White.bold()));
 			Ok(())
 		})
 	}
@ -658,7 +666,12 @@ impl MinerService for Miner {
 				// Client should send message after commit to db and inserting to chain.
 				.expect("Expected in-chain blocks.");
 			let block = BlockView::new(&block);
-			block.transactions()
+			let txs = block.transactions();
+			// populate sender
+			for tx in &txs {
+				let _sender = tx.sender();
+			}
+			txs
 		}

 		// 1. We ignore blocks that were `imported` (because it means that they are not in canon-chain, and transactions
@ -675,14 +688,10 @@ impl MinerService for Miner {
 				.par_iter()
 				.map(|h| fetch_transactions(chain, h));
 			out_of_chain.for_each(|txs| {
-				// populate sender
-				for tx in &txs {
-					let _sender = tx.sender();
-				}
-				let _ = self.import_transactions(chain, txs, |a| AccountDetails {
-					nonce: chain.latest_nonce(a),
-					balance: chain.latest_balance(a),
-				});
+				let mut transaction_queue = self.transaction_queue.lock().unwrap();
+				let _ = self.add_transactions_to_queue(
+					chain, txs, TransactionOrigin::External, &mut transaction_queue
+				);
 			});
 		}

--- a/ethcore/src/miner/mod.rs
+++ b/ethcore/src/miner/mod.rs
@ -33,7 +33,7 @@
 //! use ethcore::miner::{Miner, MinerService};
 //!
 //! fn main() {
-//!		let miner: Miner = Miner::with_spec(ethereum::new_frontier(true));
+//!		let miner: Miner = Miner::with_spec(ethereum::new_frontier());
 //!		// get status
 //!		assert_eq!(miner.status().transactions_in_pending_queue, 0);
 //!
@ -107,14 +107,12 @@ pub trait MinerService : Send + Sync {
 	fn set_tx_gas_limit(&self, limit: U256);

 	/// Imports transactions to transaction queue.
-	fn import_transactions<T>(&self, chain: &MiningBlockChainClient, transactions: Vec<SignedTransaction>, fetch_account: T) ->
-		Vec<Result<TransactionImportResult, Error>>
-		where T: Fn(&Address) -> AccountDetails, Self: Sized;
+	fn import_external_transactions(&self, chain: &MiningBlockChainClient, transactions: Vec<SignedTransaction>) ->
+		Vec<Result<TransactionImportResult, Error>>;

 	/// Imports own (node owner) transaction to queue.
-	fn import_own_transaction<T>(&self, chain: &MiningBlockChainClient, transaction: SignedTransaction, fetch_account: T) ->
-		Result<TransactionImportResult, Error>
-		where T: Fn(&Address) -> AccountDetails, Self: Sized;
+	fn import_own_transaction(&self, chain: &MiningBlockChainClient, transaction: SignedTransaction) ->
+		Result<TransactionImportResult, Error>;

 	/// Returns hashes of transactions currently in pending
 	fn pending_transactions_hashes(&self) -> Vec<H256>;
--- a/ethcore/src/miner/transaction_queue.rs
+++ b/ethcore/src/miner/transaction_queue.rs
@ -198,6 +198,7 @@ struct VerifiedTransaction {
 	/// transaction origin
 	origin: TransactionOrigin,
 }
+
 impl VerifiedTransaction {
 	fn new(transaction: SignedTransaction, origin: TransactionOrigin) -> Result<Self, Error> {
 		try!(transaction.sender());
--- a/ethcore/src/pod_state.rs
+++ b/ethcore/src/pod_state.rs
@ -72,7 +72,7 @@ impl fmt::Display for PodState {

 /// Calculate and return diff between `pre` state and `post` state.
 pub fn diff_pod(pre: &PodState, post: &PodState) -> StateDiff {
-	StateDiff(pre.get().keys().merge(post.get().keys()).filter_map(|acc| pod_account::diff_pod(pre.get().get(acc), post.get().get(acc)).map(|d|(acc.clone(), d))).collect())
+	StateDiff { raw: pre.get().keys().merge(post.get().keys()).filter_map(|acc| pod_account::diff_pod(pre.get().get(acc), post.get().get(acc)).map(|d|(acc.clone(), d))).collect() }
 }

 #[cfg(test)]
@ -86,22 +86,22 @@ mod test {
 	#[test]
 	fn create_delete() {
 		let a = PodState::from(map![ 1.into() => PodAccount::new(69.into(), 0.into(), vec![], map![]) ]);
-		assert_eq!(super::diff_pod(&a, &PodState::new()), StateDiff(map![
+		assert_eq!(super::diff_pod(&a, &PodState::new()), StateDiff { raw: map![
 			1.into() => AccountDiff{
 				balance: Diff::Died(69.into()),
 				nonce: Diff::Died(0.into()),
 				code: Diff::Died(vec![]),
 				storage: map![],
 			}
-		]));
-		assert_eq!(super::diff_pod(&PodState::new(), &a), StateDiff(map![
+		]});
+		assert_eq!(super::diff_pod(&PodState::new(), &a), StateDiff{ raw: map![
 			1.into() => AccountDiff{
 				balance: Diff::Born(69.into()),
 				nonce: Diff::Born(0.into()),
 				code: Diff::Born(vec![]),
 				storage: map![],
 			}
-		]));
+		]});
 	}

 	#[test]
@ -111,22 +111,22 @@ mod test {
 			1.into() => PodAccount::new(69.into(), 0.into(), vec![], map![]),
 			2.into() => PodAccount::new(69.into(), 0.into(), vec![], map![])
 		]);
-		assert_eq!(super::diff_pod(&a, &b), StateDiff(map![
+		assert_eq!(super::diff_pod(&a, &b), StateDiff { raw: map![
 			2.into() => AccountDiff{
 				balance: Diff::Born(69.into()),
 				nonce: Diff::Born(0.into()),
 				code: Diff::Born(vec![]),
 				storage: map![],
 			}
-		]));
-		assert_eq!(super::diff_pod(&b, &a), StateDiff(map![
+		]});
+		assert_eq!(super::diff_pod(&b, &a), StateDiff { raw: map![
 			2.into() => AccountDiff{
 				balance: Diff::Died(69.into()),
 				nonce: Diff::Died(0.into()),
 				code: Diff::Died(vec![]),
 				storage: map![],
 			}
-		]));
+		]});
 	}

 	#[test]
@ -139,14 +139,14 @@ mod test {
 			1.into() => PodAccount::new(69.into(), 1.into(), vec![], map![]),
 			2.into() => PodAccount::new(69.into(), 0.into(), vec![], map![])
 		]);
-		assert_eq!(super::diff_pod(&a, &b), StateDiff(map![
+		assert_eq!(super::diff_pod(&a, &b), StateDiff { raw: map![
 			1.into() => AccountDiff{
 				balance: Diff::Same,
 				nonce: Diff::Changed(0.into(), 1.into()),
 				code: Diff::Same,
 				storage: map![],
 			}
-		]));
+		]});
 	}

 }
--- a/ethcore/src/service.rs
+++ b/ethcore/src/service.rs
@ -17,7 +17,6 @@
 //! Creates and registers client and network services.

 use util::*;
-use util::Colour::{Yellow, White};
 use util::panics::*;
 use spec::Spec;
 use error::*;
@ -72,7 +71,7 @@ impl ClientService {
 			try!(net_service.start());
 		}

-		info!("Configured for {} using {} engine", paint(White.bold(), spec.name.clone()), paint(Yellow.bold(), spec.engine.name().to_owned()));
+		info!("Configured for {} using {} engine", spec.name.clone().apply(Colour::White.bold()), spec.engine.name().apply(Colour::Yellow.bold()));
 		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 {
@ -135,16 +134,14 @@ impl IoHandler<NetSyncMessage> for ClientIoHandler {

 	#[cfg_attr(feature="dev", allow(single_match))]
 	fn message(&self, io: &IoContext<NetSyncMessage>, net_message: &NetSyncMessage) {
-		if let UserMessage(ref message) = *net_message {
-			match *message {
-				SyncMessage::BlockVerified => {
-					self.client.import_verified_blocks(&io.channel());
+		match *net_message {
+			UserMessage(ref message) => match *message {
+				SyncMessage::BlockVerified => { self.client.import_verified_blocks(&io.channel()); }
+				SyncMessage::NewTransactions(ref transactions) => { self.client.import_queued_transactions(&transactions); }
+				_ => {} // ignore other messages
 			},
-				SyncMessage::NewTransactions(ref transactions) => {
-					self.client.import_queued_transactions(&transactions);
-				},
-				_ => {}, // ignore other messages
-			}
+			NetworkIoMessage::NetworkStarted(ref url) => { self.client.network_started(url); }
+			_ => {} // ignore other messages
 		}
 	}
 }
--- a/ethcore/src/tests/helpers.rs
+++ b/ethcore/src/tests/helpers.rs
@ -180,7 +180,6 @@ pub fn generate_dummy_client_with_spec_and_data<F>(get_test_spec: F, block_numbe
 			db,
 			&last_header,
 			last_hashes.clone(),
-			None,
 			author.clone(),
 			(3141562.into(), 31415620.into()),
 			vec![]
--- a/ethcore/src/tests/mod.rs
+++ b/ethcore/src/tests/mod.rs
@ -16,3 +16,4 @@

 pub mod helpers;
 mod client;
+mod rpc;
--- a/ethcore/src/tests/rpc.rs
+++ b/ethcore/src/tests/rpc.rs
@ -0,0 +1,71 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Client RPC tests
+
+use nanoipc;
+use std::sync::Arc;
+use std::sync::atomic::{Ordering, AtomicBool};
+use client::{Client, BlockChainClient, ClientConfig, RemoteClient, BlockID};
+use tests::helpers::*;
+use devtools::*;
+use miner::Miner;
+use crossbeam;
+use common::IoChannel;
+
+pub fn run_test_worker(scope: &crossbeam::Scope, stop: Arc<AtomicBool>, socket_path: &str) {
+	let socket_path = socket_path.to_owned();
+	scope.spawn(move || {
+		let temp = RandomTempPath::create_dir();
+		let client = Client::new(
+			ClientConfig::default(),
+			get_test_spec(),
+			temp.as_path(),
+			Arc::new(Miner::with_spec(get_test_spec())),
+			IoChannel::disconnected()).unwrap();
+		let mut worker = nanoipc::Worker::new(&client);
+		worker.add_reqrep(&socket_path).unwrap();
+		while !stop.load(Ordering::Relaxed) {
+			worker.poll();
+		}
+	});
+}
+
+#[test]
+fn can_handshake() {
+	crossbeam::scope(|scope| {
+		let stop_guard = StopGuard::new();
+		let socket_path = "ipc:///tmp/parity-client-rpc-10.ipc";
+		run_test_worker(scope, stop_guard.share(), socket_path);
+		let remote_client = nanoipc::init_client::<RemoteClient<_>>(socket_path).unwrap();
+
+		assert!(remote_client.handshake().is_ok());
+	})
+}
+
+#[test]
+fn can_query_block() {
+	crossbeam::scope(|scope| {
+		let stop_guard = StopGuard::new();
+		let socket_path = "ipc:///tmp/parity-client-rpc-20.ipc";
+		run_test_worker(scope, stop_guard.share(), socket_path);
+		let remote_client = nanoipc::init_client::<RemoteClient<_>>(socket_path).unwrap();
+
+		let non_existant_block = remote_client.block_header(BlockID::Number(999));
+
+		assert!(non_existant_block.is_none());
+	})
+}
--- a/ethcore/src/types/account_diff.rs
+++ b/ethcore/src/types/account_diff.rs
@ -16,11 +16,17 @@

 //! Diff between two accounts.

-use util::*;
+use util::numbers::*;
+use std::cmp::*;
+use std::fmt;
+use ipc::binary::{BinaryConvertError, BinaryConvertable};
+use util::Bytes;
+use std::collections::{VecDeque, BTreeMap};
+use std::mem;

-#[derive(Debug, PartialEq, Eq, Clone)]
+#[derive(Debug, PartialEq, Eq, Clone, Binary)]
 /// Diff type for specifying a change (or not).
-pub enum Diff<T> where T: Eq {
+pub enum Diff<T> where T: Eq + BinaryConvertable {
 	/// Both sides are the same.
 	Same,
 	/// Left (pre, source) side doesn't include value, right side (post, destination) does.
@ -31,7 +37,7 @@ pub enum Diff<T> where T: Eq {
 	Died(T),
 }

-impl<T> Diff<T> where T: Eq {
+impl<T> Diff<T> where T: Eq + BinaryConvertable {
 	/// Construct new object with given `pre` and `post`.
 	pub fn new(pre: T, post: T) -> Self { if pre == post { Diff::Same } else { Diff::Changed(pre, post) } }

@ -45,7 +51,7 @@ impl<T> Diff<T> where T: Eq {
 	pub fn is_same(&self) -> bool { match *self { Diff::Same => true, _ => false }}
 }

-#[derive(Debug, PartialEq, Eq, Clone)]
+#[derive(Debug, PartialEq, Eq, Clone, Binary)]
 /// Account diff.
 pub struct AccountDiff {
 	/// Change in balance, allowed to be `Diff::Same`.
@ -58,7 +64,7 @@ pub struct AccountDiff {
 	pub storage: BTreeMap<H256, Diff<H256>>,
 }

-#[derive(Debug, PartialEq, Eq, Clone)]
+#[derive(Debug, PartialEq, Eq, Clone, Binary)]
 /// Change in existance type.
 // TODO: include other types of change.
 pub enum Existance {
@ -94,6 +100,8 @@ impl AccountDiff {

 // TODO: refactor into something nicer.
 fn interpreted_hash(u: &H256) -> String {
+	use util::bytes::*;
+
 	if u <= &H256::from(0xffffffff) {
 		format!("{} = 0x{:x}", U256::from(u.as_slice()).low_u32(), U256::from(u.as_slice()).low_u32())
 	} else if u <= &H256::from(u64::max_value()) {
@ -107,6 +115,8 @@ fn interpreted_hash(u: &H256) -> String {

 impl fmt::Display for AccountDiff {
 	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		use util::bytes::*;
+
 		match self.nonce {
 			Diff::Born(ref x) => try!(write!(f, "  non {}", x)),
 			Diff::Changed(ref pre, ref post) => try!(write!(f, "#{} ({} {} {})", post, pre, if pre > post {"-"} else {"+"}, *max(pre, post) - *	min(pre, post))),
--- a/ethcore/src/types/block_queue_info.rs
+++ b/ethcore/src/types/block_queue_info.rs
@ -0,0 +1,38 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Block queue info types
+
+use std::mem;
+use ipc::binary::BinaryConvertError;
+use std::collections::VecDeque;
+
+/// Block queue status
+#[derive(Debug, Binary)]
+pub struct BlockQueueInfo {
+	/// Number of queued blocks pending verification
+	pub unverified_queue_size: usize,
+	/// Number of verified queued blocks pending import
+	pub verified_queue_size: usize,
+	/// Number of blocks being verified
+	pub verifying_queue_size: usize,
+	/// Configured maximum number of blocks in the queue
+	pub max_queue_size: usize,
+	/// Configured maximum number of bytes to use
+	pub max_mem_use: usize,
+	/// Heap memory used in bytes
+	pub mem_used: usize,
+}
--- a/ethcore/src/types/call_analytics.rs
+++ b/ethcore/src/types/call_analytics.rs
@ -0,0 +1,32 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Call analytics related types
+
+use std::mem;
+use ipc::binary::{BinaryConvertError};
+use std::collections::VecDeque;
+
+/// Options concerning what analytics we run on the call.
+#[derive(Eq, PartialEq, Default, Clone, Copy, Debug, Binary)]
+pub struct CallAnalytics {
+	/// Make a transaction trace.
+	pub transaction_tracing: bool,
+	/// Make a VM trace.
+	pub vm_tracing: bool,
+	/// Make a diff.
+	pub state_diffing: bool,
+}
--- a/ethcore/src/types/executed.rs
+++ b/ethcore/src/types/executed.rs
@ -27,7 +27,7 @@ use std::mem;
 use std::collections::VecDeque;

 /// Transaction execution receipt.
-#[derive(Debug, PartialEq, Clone)]
+#[derive(Debug, PartialEq, Clone, Binary)]
 pub struct Executed {
 	/// Gas paid up front for execution of transaction.
 	pub gas: U256,
--- a/ethcore/src/types/filter.rs
+++ b/ethcore/src/types/filter.rs
@ -20,8 +20,12 @@ use util::hash::*;
 use util::sha3::*;
 use client::BlockID;
 use log_entry::LogEntry;
+use ipc::binary::BinaryConvertError;
+use std::mem;
+use std::collections::VecDeque;

 /// Blockchain Filter.
+#[derive(Binary)]
 pub struct Filter {
 	/// Blockchain will be searched from this block.
 	pub from_block: BlockID,
@ -39,12 +43,17 @@ pub struct Filter {
 	///
 	/// If None, match all.
 	/// If specified, log must contain one of these topics.
-	pub topics: [Option<Vec<H256>>; 4],
+	pub topics: Vec<Option<Vec<H256>>>,
 }

 impl Clone for Filter {
 	fn clone(&self) -> Self {
-		let mut topics = [None, None, None, None];
+		let mut topics = [
+			None,
+			None,
+			None,
+			None,
+		];
 		for i in 0..4 {
 			topics[i] = self.topics[i].clone();
 		}
@ -53,7 +62,7 @@ impl Clone for Filter {
 			from_block: self.from_block.clone(),
 			to_block: self.to_block.clone(),
 			address: self.address.clone(),
-			topics: topics
+			topics: topics[..].to_vec()
 		}
 	}
 }
@ -71,7 +80,7 @@ impl Filter {
 			_ => vec![H2048::new()]
 		};

-		self.topics.iter().fold(blooms, | bs, topic | match *topic {
+		self.topics.iter().fold(blooms, |bs, topic| match *topic {
 			None => bs,
 			Some(ref topics) => bs.into_iter().flat_map(|bloom| {
 				topics.into_iter().map(|topic| {
@ -111,7 +120,7 @@ mod tests {
 			from_block: BlockID::Earliest,
 			to_block: BlockID::Latest,
 			address: None,
-			topics: [None, None, None, None]
+			topics: vec![None, None, None, None],
 		};

 		let possibilities = none_filter.bloom_possibilities();
@ -126,9 +135,11 @@ mod tests {
 			from_block: BlockID::Earliest,
 			to_block: BlockID::Latest,
 			address: Some(vec![Address::from_str("b372018f3be9e171df0581136b59d2faf73a7d5d").unwrap()]),
-			topics: [
+			topics: vec![
 				Some(vec![H256::from_str("ff74e91598aed6ae5d2fdcf8b24cd2c7be49a0808112a305069355b7160f23f9").unwrap()]),
-				None, None, None
+				None,
+				None,
+				None,
 			]
 		};

@ -142,10 +153,11 @@ mod tests {
 			from_block: BlockID::Earliest,
 			to_block: BlockID::Latest,
 			address: Some(vec![Address::from_str("b372018f3be9e171df0581136b59d2faf73a7d5d").unwrap()]),
-			topics: [
+			topics: vec![
 				Some(vec![H256::from_str("ff74e91598aed6ae5d2fdcf8b24cd2c7be49a0808112a305069355b7160f23f9").unwrap()]),
 				Some(vec![H256::from_str("ff74e91598aed6ae5d2fdcf8b24cd2c7be49a0808112a305069355b7160f23f9").unwrap()]),
-				None, None
+				None,
+				None,
 			]
 		};

@ -162,7 +174,7 @@ mod tests {
 						  Address::from_str("b372018f3be9e171df0581136b59d2faf73a7d5d").unwrap(),
 						  Address::from_str("b372018f3be9e171df0581136b59d2faf73a7d5d").unwrap(),
 			]),
-			topics: [
+			topics: vec![
 				Some(vec![
 					 H256::from_str("ff74e91598aed6ae5d2fdcf8b24cd2c7be49a0808112a305069355b7160f23f9").unwrap(),
 					 H256::from_str("ff74e91598aed6ae5d2fdcf8b24cd2c7be49a0808112a305069355b7160f23f9").unwrap()
@ -188,10 +200,11 @@ mod tests {
 			from_block: BlockID::Earliest,
 			to_block: BlockID::Latest,
 			address: Some(vec![Address::from_str("b372018f3be9e171df0581136b59d2faf73a7d5d").unwrap()]),
-			topics: [
+			topics: vec![
 				Some(vec![H256::from_str("ff74e91598aed6ae5d2fdcf8b24cd2c7be49a0808112a305069355b7160f23f9").unwrap()]),
 				Some(vec![H256::from_str("ff74e91598aed6ae5d2fdcf8b24cd2c7be49a0808112a305069355b7160f23fa").unwrap()]),
-				None, None
+				None,
+				None,
 			]
 		};

--- a/ethcore/src/types/ids.rs
+++ b/ethcore/src/types/ids.rs
@ -47,6 +47,7 @@ pub enum TransactionID {
 }

 /// Uniquely identifies Trace.
+#[derive(Binary)]
 pub struct TraceId {
 	/// Transaction
 	pub transaction: TransactionID,
--- a/ethcore/src/types/mod.rs.in
+++ b/ethcore/src/types/mod.rs.in
@ -25,5 +25,9 @@ pub mod executed;
 pub mod block_status;
 pub mod account_diff;
 pub mod state_diff;
+pub mod block_queue_info;
+pub mod filter;
+pub mod trace_filter;
+pub mod call_analytics;
 pub mod transaction_import;
 pub mod block_import_error;
--- a/ethcore/src/types/state_diff.rs
+++ b/ethcore/src/types/state_diff.rs
@ -16,24 +16,32 @@

 //! State diff module.

-use util::*;
+use util::numbers::*;
 use account_diff::*;
+use ipc::binary::BinaryConvertError;
+use std::mem;
+use std::fmt;
+use std::ops::*;
+use std::collections::{VecDeque, BTreeMap};

-#[derive(Debug, PartialEq, Eq, Clone)]
+#[derive(Debug, PartialEq, Eq, Clone, Binary)]
 /// Expression for the delta between two system states. Encoded the
 /// delta of every altered account.
-pub struct StateDiff (pub BTreeMap<Address, AccountDiff>);
+pub struct StateDiff {
+	/// Raw diff key-value
+	pub raw: BTreeMap<Address, AccountDiff>
+}

 impl StateDiff {
 	/// Get the actual data.
 	pub fn get(&self) -> &BTreeMap<Address, AccountDiff> {
-		&self.0
+		&self.raw
 	}
 }

 impl fmt::Display for StateDiff {
 	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-		for (add, acc) in &self.0 {
+		for (add, acc) in &self.raw {
 			try!(write!(f, "{} {}: {}", acc.existance(), add, acc));
 		}
 		Ok(())
@ -44,6 +52,6 @@ impl Deref for StateDiff {
 	type Target = BTreeMap<Address, AccountDiff>;

 	fn deref(&self) -> &Self::Target {
-		&self.0
+		&self.raw
 	}
 }
--- a/ethcore/src/types/trace_filter.rs
+++ b/ethcore/src/types/trace_filter.rs
@ -0,0 +1,35 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Trace filter related types
+
+use std::mem;
+use ipc::binary::{BinaryConvertError};
+use std::collections::VecDeque;
+use std::ops::Range;
+use util::{Address};
+use types::ids::BlockID;
+
+/// Easy to use trace filter.
+#[derive(Binary)]
+pub struct Filter {
+	/// Range of filtering.
+	pub range: Range<BlockID>,
+	/// From address.
+	pub from_address: Vec<Address>,
+	/// To address.
+	pub to_address: Vec<Address>,
+}
--- a/ethcore/src/types/tree_route.rs
+++ b/ethcore/src/types/tree_route.rs
@ -17,9 +17,12 @@
 //! Tree route info type definition

 use util::numbers::H256;
+use ipc::BinaryConvertError;
+use std::collections::VecDeque;
+use std::mem;

 /// Represents a tree route between `from` block and `to` block:
-#[derive(Debug)]
+#[derive(Debug, Binary)]
 pub struct TreeRoute {
 	/// A vector of hashes of all blocks, ordered from `from` to `to`.
 	pub blocks: Vec<H256>,
--- a/ipc/codegen/src/codegen.rs
+++ b/ipc/codegen/src/codegen.rs
@ -727,7 +727,6 @@ pub fn get_ipc_meta_items(attr: &ast::Attribute) -> Option<&[P<ast::MetaItem>]>
 fn client_ident_renamed(cx: &ExtCtxt, item: &ast::Item) -> Option<String> {
 	for meta_items in item.attrs().iter().filter_map(get_ipc_meta_items) {
 		for meta_item in meta_items {
-			let span = meta_item.span;
 			match meta_item.node {
 				ast::MetaItemKind::NameValue(ref name, ref lit) if name == &"client_ident" => {
 					if let Ok(s) = get_str_from_lit(cx, name, lit) {
--- a/ipc/codegen/src/serialization.rs
+++ b/ipc/codegen/src/serialization.rs
@ -707,7 +707,12 @@ fn binary_expr_variant(
 						let buffer = &mut buffer[1..];
 						$write_expr
 				}),
-				read: quote_arm!(cx, $variant_index_ident => { $read_expr } ),
+				read: quote_arm!(cx,
+					$variant_index_ident => {
+					 	let buffer = &buffer[1..];
+						$read_expr
+					}
+				),
 			})
 		},
 		ast::VariantData::Struct(ref fields, _) => {
@ -742,7 +747,12 @@ fn binary_expr_variant(
 						let buffer = &mut buffer[1..];
 						$write_expr
 				}),
-				read: quote_arm!(cx, $variant_index_ident => { $read_expr } ),
+				read: quote_arm!(cx,
+					$variant_index_ident => {
+					 	let buffer = &buffer[1..];
+						$read_expr
+					}
+				),
 			})
 		},
 	}
--- a/ipc/rpc/src/binary.rs
+++ b/ipc/rpc/src/binary.rs
@ -315,6 +315,31 @@ impl BinaryConvertable for String {
 	}
 }

+impl<T> BinaryConvertable for Range<T> where T: BinaryConvertable {
+	fn size(&self) -> usize {
+		mem::size_of::<T>() * 2
+	}
+
+	fn from_empty_bytes() -> Result<Self, BinaryConvertError> {
+		Err(BinaryConvertError)
+	}
+
+	fn to_bytes(&self, buffer: &mut[u8], length_stack: &mut VecDeque<usize>) -> Result<(), BinaryConvertError> {
+		try!(self.start.to_bytes(&mut buffer[..mem::size_of::<T>()], length_stack));
+		try!(self.end.to_bytes(&mut buffer[mem::size_of::<T>() + 1..], length_stack));
+		Ok(())
+	}
+
+	fn from_bytes(buffer: &[u8], length_stack: &mut VecDeque<usize>) -> Result<Self, BinaryConvertError> {
+		Ok(try!(T::from_bytes(&buffer[..mem::size_of::<T>()], length_stack))..try!(T::from_bytes(&buffer[mem::size_of::<T>()+1..], length_stack)))
+	}
+
+	fn len_params() -> usize {
+		assert_eq!(0, T::len_params());
+		0
+	}
+}
+
 impl<T> BinaryConvertable for ::std::cell::RefCell<T> where T: BinaryConvertable {
 	fn size(&self) -> usize {
 		self.borrow().size()
@ -539,8 +564,6 @@ binary_fixed_size!(U512);
 binary_fixed_size!(H256);
 binary_fixed_size!(H2048);
 binary_fixed_size!(Address);
-binary_fixed_size!(Range<usize>);
-binary_fixed_size!(Range<u64>);

 #[test]
 fn vec_serialize() {
--- a/ipc/rpc/src/interface.rs
+++ b/ipc/rpc/src/interface.rs
@ -91,7 +91,7 @@ pub fn invoke<W>(method_num: u16, params: &Option<Vec<u8>>, w: &mut W) where W:
 }

 /// IpcSocket, read/write generalization
-pub trait IpcSocket: Read + Write + Sync {
+pub trait IpcSocket: Read + Write + Sync + Send {
 }

 /// Basically something that needs only socket to be spawned
--- a/json/src/spec/engine.rs
+++ b/json/src/spec/engine.rs
@ -53,8 +53,7 @@ mod tests {
 					"durationLimit": "0x0d",
 					"blockReward": "0x4563918244F40000",
 					"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-					"frontierCompatibilityModeLimit" : "0x",
-					"daoRescueSoftFork": true
+					"frontierCompatibilityModeLimit" : "0x"
 				}
 			}
 		}"#;
--- a/json/src/spec/ethash.rs
+++ b/json/src/spec/ethash.rs
@ -42,9 +42,6 @@ pub struct EthashParams {
 	/// Homestead transition block number.
 	#[serde(rename="frontierCompatibilityModeLimit")]
 	pub frontier_compatibility_mode_limit: Uint,
-	/// DAO rescue soft-fork?
-	#[serde(rename="daoRescueSoftFork")]
-	pub dao_rescue_soft_fork: bool,
 }

 /// Ethash engine deserialization.
@ -69,8 +66,7 @@ mod tests {
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar": "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0x42",
-				"daoRescueSoftFork": true
+				"frontierCompatibilityModeLimit": "0x42"
 			}
 		}"#;

--- a/json/src/spec/spec.rs
+++ b/json/src/spec/spec.rs
@ -63,8 +63,7 @@ mod tests {
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit" : "0x",
-				"daoRescueSoftFork": false
+				"frontierCompatibilityModeLimit" : "0x"
 			}
 		}
 	},
--- a/parity/cli.rs
+++ b/parity/cli.rs
@ -57,9 +57,8 @@ Operating Options:
  --fork POLICY            Specifies the client's fork policy. POLICY must be
                           one of:
                           dogmatic - sticks rigidly to the standard chain.
-                           dao-soft - votes for the DAO-rescue soft-fork.
-                           normal - goes with whatever fork is decided but
-                           votes for none. [default: normal].
+                           none - goes with whatever fork is decided but
+                           votes for none. [default: none].

 Account Options:
  --unlock ACCOUNTS        Unlock ACCOUNTS for the duration of the execution.
--- a/parity/configuration.rs
+++ b/parity/configuration.rs
@ -49,8 +49,7 @@ pub struct Directories {

 #[derive(Eq, PartialEq, Debug)]
 pub enum Policy {
-	DaoSoft,
-	Normal,
+	None,
 	Dogmatic,
 }

@ -135,34 +134,25 @@ impl Configuration {

 	pub fn policy(&self) -> Policy {
 		match self.args.flag_fork.as_str() {
-			"dao-soft" => Policy::DaoSoft,
-			"normal" => Policy::Normal,
+			"none" => Policy::None,
 			"dogmatic" => Policy::Dogmatic,
 			x => die!("{}: Invalid value given for --policy option. Use --help for more info.", x)
 		}
 	}

 	pub fn gas_floor_target(&self) -> U256 {
-		if self.policy() == Policy::DaoSoft {
-			3_141_592.into()
-		} else {
 		let d = &self.args.flag_gas_floor_target;
 		U256::from_dec_str(d).unwrap_or_else(|_| {
 			die!("{}: Invalid target gas floor given. Must be a decimal unsigned 256-bit number.", d)
 		})
 	}
-	}

 	pub fn gas_ceil_target(&self) -> U256 {
-		if self.policy() == Policy::DaoSoft {
-			3_141_592.into()
-		} else {
 		let d = &self.args.flag_gas_cap;
 		U256::from_dec_str(d).unwrap_or_else(|_| {
 			die!("{}: Invalid target gas ceiling given. Must be a decimal unsigned 256-bit number.", d)
 		})
 	}
-	}

 	pub fn gas_price(&self) -> U256 {
 		match self.args.flag_gasprice.as_ref() {
@ -191,7 +181,7 @@ impl Configuration {
 				let wei_per_usd: f32 = 1.0e18 / usd_per_eth;
 				let gas_per_tx: f32 = 21000.0;
 				let wei_per_gas: f32 = wei_per_usd * usd_per_tx / gas_per_tx;
-				info!("Using a conversion rate of Ξ1 = {} ({} wei/gas)", paint(White.bold(), format!("US${}", usd_per_eth)), paint(Yellow.bold(), format!("{}", wei_per_gas)));
+				info!("Using a conversion rate of Ξ1 = {} ({} wei/gas)", format!("US${}", usd_per_eth).apply(White.bold()), format!("{}", wei_per_gas).apply(Yellow.bold()));
 				U256::from_dec_str(&format!("{:.0}", wei_per_gas)).unwrap()
 			}
 		}
@ -207,7 +197,7 @@ impl Configuration {

 	pub fn spec(&self) -> Spec {
 		match self.chain().as_str() {
-			"frontier" | "homestead" | "mainnet" => ethereum::new_frontier(self.policy() != Policy::Dogmatic),
+			"frontier" | "homestead" | "mainnet" => ethereum::new_frontier(),
 			"morden" | "testnet" => ethereum::new_morden(),
 			"olympic" => ethereum::new_olympic(),
 			f => Spec::load(contents(f).unwrap_or_else(|_| {
@ -352,7 +342,7 @@ impl Configuration {
 			if let journaldb::Algorithm::Archive = client_config.pruning {
 				client_config.trie_spec = TrieSpec::Fat;
 			} else {
-				die!("Fatdb is not supported. Please rerun with --pruning=archive")
+				die!("Fatdb is not supported. Please re-run with --pruning=archive")
 			}
 		}

@ -367,7 +357,7 @@ impl Configuration {
 		};

 		if self.args.flag_jitvm {
-			client_config.vm_type = VMType::jit().unwrap_or_else(|| die!("Parity built without jit vm."))
+			client_config.vm_type = VMType::jit().unwrap_or_else(|| die!("Parity is built without the JIT EVM."))
 		}

 		trace!(target: "parity", "Using pruning strategy of {}", client_config.pruning);
@ -439,11 +429,11 @@ impl Configuration {
 	fn geth_ipc_path(&self) -> String {
 		if cfg!(windows) {
 			r"\\.\pipe\geth.ipc".to_owned()
-		}
-		else {
-			if self.args.flag_testnet { path::ethereum::with_testnet("geth.ipc") }
-			else { path::ethereum::with_default("geth.ipc") }
-				.to_str().unwrap().to_owned()
+		} else {
+			match self.args.flag_testnet {
+				true => path::ethereum::with_testnet("geth.ipc"),
+				false => path::ethereum::with_default("geth.ipc"),
+			}.to_str().unwrap().to_owned()
 		}
 	}

--- a/parity/informant.rs
+++ b/parity/informant.rs
@ -22,7 +22,7 @@ use std::time::{Instant, Duration};
 use std::sync::RwLock;
 use std::ops::{Deref, DerefMut};
 use ethsync::{EthSync, SyncProvider};
-use util::Uint;
+use util::{Uint, NetworkService};
 use ethcore::client::*;
 use number_prefix::{binary_prefix, Standalone, Prefixed};

@ -76,7 +76,7 @@ impl Informant {
 	}

 	#[cfg_attr(feature="dev", allow(match_bool))]
-	pub fn tick(&self, client: &Client, maybe_sync: Option<&EthSync>) {
+	pub fn tick<Message>(&self, client: &Client, maybe_sync: Option<(&EthSync, &NetworkService<Message>)>) where Message: Send + Sync + Clone + 'static {
 		let elapsed = self.last_tick.read().unwrap().elapsed();
 		if elapsed < Duration::from_secs(5) {
 			return;
@ -110,11 +110,13 @@ impl Informant {
 				paint(Yellow.bold(), format!("{:3}", ((report.gas_processed - last_report.gas_processed) / From::from(elapsed.as_milliseconds() * 1000)).low_u64())),

 				match maybe_sync {
-					Some(sync) => {
+					Some((sync, net)) => {
 						let sync_info = sync.status();
-						format!("{}/{} peers   {} ",
+						let net_config = net.config();
+						format!("{}/{}/{} peers   {} ",
 							paint(Green.bold(), format!("{:2}", sync_info.num_active_peers)),
 							paint(Green.bold(), format!("{:2}", sync_info.num_peers)),
+							paint(Green.bold(), format!("{:2}", net_config.ideal_peers)),
 							paint(Cyan.bold(), format!("{:>8}", format!("#{}", sync_info.last_imported_block_number.unwrap_or(chain_info.best_block_number)))),
 						)
 					}
@ -128,7 +130,7 @@ impl Informant {
 				paint(Purple.bold(), format!("{:>8}", Informant::format_bytes(cache_info.total()))),
 				paint(Purple.bold(), format!("{:>8}", Informant::format_bytes(queue_info.mem_used))),
 				match maybe_sync {
-					Some(sync) => {
+					Some((sync, _)) => {
 						let sync_info = sync.status();
 						format!(" {} sync", paint(Purple.bold(), format!("{:>8}", Informant::format_bytes(sync_info.mem_used))))
 					}
--- a/parity/io_handler.rs
+++ b/parity/io_handler.rs
@ -40,7 +40,9 @@ impl IoHandler<NetSyncMessage> for ClientIoHandler {

 	fn timeout(&self, _io: &IoContext<NetSyncMessage>, timer: TimerToken) {
 		if let INFO_TIMER = timer {
-			self.info.tick(&self.client, Some(&self.sync));
+			if let Some(net) = self.network.upgrade() {
+				self.info.tick(&self.client, Some((&self.sync, &net)));
+			}
 		}
 	}

--- a/parity/main.rs
+++ b/parity/main.rs
@ -80,7 +80,7 @@ use std::thread::sleep;
 use std::time::Duration;
 use rustc_serialize::hex::FromHex;
 use ctrlc::CtrlC;
-use util::{H256, ToPretty, NetworkConfiguration, PayloadInfo, Bytes, UtilError, paint, Colour, version};
+use util::{H256, ToPretty, NetworkConfiguration, PayloadInfo, Bytes, UtilError, Colour, Applyable, version, journaldb};
 use util::panics::{MayPanic, ForwardPanic, PanicHandler};
 use ethcore::client::{Mode, BlockID, BlockChainClient, ClientConfig, get_db_path, BlockImportError};
 use ethcore::error::{ImportError};
@ -97,7 +97,7 @@ use rpc::RpcServer;
 use signer::{SignerServer, new_token};
 use dapps::WebappServer;
 use io_handler::ClientIoHandler;
-use configuration::Configuration;
+use configuration::{Policy, Configuration};

 fn main() {
 	let conf = Configuration::parse();
@ -188,10 +188,21 @@ fn execute_client(conf: Configuration, spec: Spec, client_config: ClientConfig)
 	// Raise fdlimit
 	unsafe { ::fdlimit::raise_fd_limit(); }

-	info!("Starting {}", paint(Colour::White.bold(), format!("{}", version())));
+	info!("Starting {}", format!("{}", version()).apply(Colour::White.bold()));
+	info!("Using state DB journalling strategy {}", match client_config.pruning {
+		journaldb::Algorithm::Archive => "archive",
+		journaldb::Algorithm::EarlyMerge => "light",
+		journaldb::Algorithm::OverlayRecent => "fast",
+		journaldb::Algorithm::RefCounted => "basic",
+	}.apply(Colour::White.bold()));

-	let net_settings = conf.net_settings(&spec);
-	let sync_config = conf.sync_config(&spec);
+	// Display warning about using experimental journaldb types
+	match client_config.pruning {
+		journaldb::Algorithm::EarlyMerge | journaldb::Algorithm::RefCounted => {
+			warn!("Your chosen strategy is {}! You can re-run with --pruning to change.", "unstable".apply(Colour::Red.bold()));
+		}
+		_ => {}
+	}

 	// Display warning about using unlock with signer
 	if conf.signer_enabled() && conf.args.flag_unlock.is_some() {
@ -199,6 +210,14 @@ fn execute_client(conf: Configuration, spec: Spec, client_config: ClientConfig)
 		warn!("NOTE that Signer will not ask you to confirm transactions from unlocked account.");
 	}

+	// Check fork settings.
+	if conf.policy() != Policy::None {
+		warn!("Value given for --policy, yet no proposed forks exist. Ignoring.");		
+	}
+
+	let net_settings = conf.net_settings(&spec);
+	let sync_config = conf.sync_config(&spec);
+
 	// Secret Store
 	let account_service = Arc::new(conf.account_service());

@ -466,7 +485,7 @@ fn execute_import(conf: Configuration) {
 			Err(BlockImportError::Import(ImportError::AlreadyInChain)) => { trace!("Skipping block already in chain."); }
 			Err(e) => die!("Cannot import block: {:?}", e)
 		}
-		informant.tick(client.deref(), None);
+		informant.tick::<&'static ()>(client.deref(), None);
 	};

 	match format {
--- a/parity/signer.rs
+++ b/parity/signer.rs
@ -14,11 +14,10 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

-extern crate ansi_term;
-use self::ansi_term::Colour::White;
 use std::io;
 use std::path::PathBuf;
 use std::sync::Arc;
+use util::{Colour, Applyable};
 use util::panics::{PanicHandler, ForwardPanic};
 use util::path::restrict_permissions_owner;
 use die::*;
@ -67,7 +66,7 @@ pub fn new_token(path: String) -> io::Result<()> {
 	let mut codes = try!(signer::AuthCodes::from_file(&path));
 	let code = try!(codes.generate_new());
 	try!(codes.to_file(&path));
-	println!("This key code will authorise your System Signer UI: {}", White.bold().paint(code));
+	println!("This key code will authorise your System Signer UI: {}", code.apply(Colour::White.bold()));
 	Ok(())
 }

--- a/rpc/Cargo.toml
+++ b/rpc/Cargo.toml
@ -25,6 +25,7 @@ transient-hashmap = "0.1"
 serde_macros = { version = "0.7.0", optional = true }
 clippy = { version = "0.0.78", optional = true}
 json-ipc-server = { git = "https://github.com/ethcore/json-ipc-server.git" }
+ethcore-ipc = { path = "../ipc/rpc" }

 [build-dependencies]
 serde_codegen = { version = "0.7.0", optional = true }
--- a/rpc/src/lib.rs
+++ b/rpc/src/lib.rs
@ -32,6 +32,7 @@ extern crate ethcore;
 extern crate ethsync;
 extern crate transient_hashmap;
 extern crate json_ipc_server as ipc;
+extern crate ethcore_ipc;

 #[cfg(test)]
 extern crate ethjson;
--- a/rpc/src/v1/impls/eth.rs
+++ b/rpc/src/v1/impls/eth.rs
@ -30,6 +30,7 @@ use util::sha3::*;
 use util::rlp::{encode, decode, UntrustedRlp, View};
 use ethcore::account_provider::AccountProvider;
 use ethcore::client::{MiningBlockChainClient, BlockID, TransactionID, UncleID};
+use ethcore::header::Header as BlockHeader;
 use ethcore::block::IsBlock;
 use ethcore::views::*;
 use ethcore::ethereum::Ethash;
@ -42,7 +43,6 @@ use v1::types::{Block, BlockTransactions, BlockNumber, Bytes, SyncStatus, SyncIn
 use v1::helpers::CallRequest as CRequest;
 use v1::impls::{default_gas_price, dispatch_transaction, error_codes};
 use serde;
-use ethcore::header::Header as BlockHeader;

 /// Eth rpc implementation.
 pub struct EthClient<C, S, M, EM> where
--- a/rpc/src/v1/impls/mod.rs
+++ b/rpc/src/v1/impls/mod.rs
@ -56,7 +56,7 @@ pub use self::rpc::RpcClient;
 use v1::helpers::TransactionRequest;
 use v1::types::H256 as NH256;
 use ethcore::error::Error as EthcoreError;
-use ethcore::miner::{AccountDetails, MinerService};
+use ethcore::miner::MinerService;
 use ethcore::client::MiningBlockChainClient;
 use ethcore::transaction::{Action, SignedTransaction, Transaction};
 use ethcore::account_provider::{AccountProvider, Error as AccountError};
@ -80,12 +80,7 @@ fn dispatch_transaction<C, M>(client: &C, miner: &M, signed_transaction: SignedT
 	where C: MiningBlockChainClient, M: MinerService {
 	let hash = NH256::from(signed_transaction.hash());

-	let import = miner.import_own_transaction(client, signed_transaction, |a: &Address| {
-		AccountDetails {
-			nonce: client.latest_nonce(&a),
-			balance: client.latest_balance(&a),
-		}
-	});
+	let import = miner.import_own_transaction(client, signed_transaction);

 	import
 		.map_err(transaction_error)
--- a/rpc/src/v1/tests/eth.rs
+++ b/rpc/src/v1/tests/eth.rs
@ -200,8 +200,7 @@ const TRANSACTION_COUNT_SPEC: &'static [u8] = br#"{
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0xffffffffffffffff",
-				"daoRescueSoftFork": false
+				"frontierCompatibilityModeLimit": "0xffffffffffffffff"
 			}
 		}
 	},
--- a/rpc/src/v1/tests/helpers/miner_service.rs
+++ b/rpc/src/v1/tests/helpers/miner_service.rs
@ -23,7 +23,7 @@ use ethcore::client::{MiningBlockChainClient, Executed, CallAnalytics};
 use ethcore::block::{ClosedBlock, IsBlock};
 use ethcore::transaction::SignedTransaction;
 use ethcore::receipt::Receipt;
-use ethcore::miner::{MinerService, MinerStatus, AccountDetails, TransactionImportResult};
+use ethcore::miner::{MinerService, MinerStatus, TransactionImportResult};

 /// Test miner service.
 pub struct TestMinerService {
@ -130,14 +130,13 @@ impl MinerService for TestMinerService {
 	}

 	/// Imports transactions to transaction queue.
-	fn import_transactions<T>(&self, _chain: &MiningBlockChainClient, transactions: Vec<SignedTransaction>, fetch_account: T) ->
-		Vec<Result<TransactionImportResult, Error>>
-		where T: Fn(&Address) -> AccountDetails {
+	fn import_external_transactions(&self, _chain: &MiningBlockChainClient, transactions: Vec<SignedTransaction>) ->
+		Vec<Result<TransactionImportResult, Error>> {
 		// lets assume that all txs are valid
 		self.imported_transactions.lock().unwrap().extend_from_slice(&transactions);

 		for sender in transactions.iter().filter_map(|t| t.sender().ok()) {
-			let nonce = self.last_nonce(&sender).unwrap_or(fetch_account(&sender).nonce);
+			let nonce = self.last_nonce(&sender).expect("last_nonce must be populated in tests");
 			self.last_nonces.write().unwrap().insert(sender, nonce + U256::from(1));
 		}
 		transactions
@ -147,9 +146,8 @@ impl MinerService for TestMinerService {
 	}

 	/// Imports transactions to transaction queue.
-	fn import_own_transaction<T>(&self, chain: &MiningBlockChainClient, transaction: SignedTransaction, _fetch_account: T) ->
-		Result<TransactionImportResult, Error>
-		where T: Fn(&Address) -> AccountDetails {
+	fn import_own_transaction(&self, chain: &MiningBlockChainClient, transaction: SignedTransaction) ->
+		Result<TransactionImportResult, Error> {

 		// keep the pending nonces up to date
 		if let Ok(ref sender) = transaction.sender() {
--- a/rpc/src/v1/types/filter.rs
+++ b/rpc/src/v1/types/filter.rs
@ -84,7 +84,7 @@ impl Into<EthFilter> for Filter {
 					VariadicValue::Single(t) => Some(vec![t.into()]),
 					VariadicValue::Multiple(t) => Some(t.into_iter().map(Into::into).collect())
 				}).filter_map(|m| m).collect()).into_iter();
-				[iter.next(), iter.next(), iter.next(), iter.next()]
+				vec![iter.next(), iter.next(), iter.next(), iter.next()]
 			}
 		}
 	}
--- a/rpc/src/v1/types/trace.rs
+++ b/rpc/src/v1/types/trace.rs
@ -162,7 +162,7 @@ pub enum Diff<T> where T: Serialize {
 	Changed(ChangedType<T>),
 }

-impl<T, U> From<account_diff::Diff<T>> for Diff<U> where T: Eq, U: Serialize + From<T> {
+impl<T, U> From<account_diff::Diff<T>> for Diff<U> where T: Eq + ::ethcore_ipc::BinaryConvertable, U: Serialize + From<T> {
 	fn from(c: account_diff::Diff<T>) -> Self {
 		match c {
 			account_diff::Diff::Same => Diff::Same,
@ -205,7 +205,7 @@ impl Serialize for StateDiff {

 impl From<state_diff::StateDiff> for StateDiff {
 	fn from(c: state_diff::StateDiff) -> Self {
-		StateDiff(c.0.into_iter().map(|(k, v)| (k.into(), v.into())).collect())
+		StateDiff(c.raw.into_iter().map(|(k, v)| (k.into(), v.into())).collect())
 	}
 }

--- a/sync/src/lib.rs
+++ b/sync/src/lib.rs
@ -44,10 +44,10 @@
 //! 	let mut service = NetworkService::new(NetworkConfiguration::new()).unwrap();
 //! 	service.start().unwrap();
 //! 	let dir = env::temp_dir();
-//! 	let miner = Miner::new(Default::default(), ethereum::new_frontier(true), None);
+//! 	let miner = Miner::new(Default::default(), ethereum::new_frontier(), None);
 //! 	let client = Client::new(
 //!			ClientConfig::default(),
-//!			ethereum::new_frontier(true),
+//!			ethereum::new_frontier(),
 //!			&dir,
 //!			miner,
 //!			service.io().channel()
--- a/util/src/io/service.rs
+++ b/util/src/io/service.rs
@ -248,6 +248,13 @@ impl<Message> Handler for IoManager<Message> where Message: Send + Clone + Sync
 			IoMessage::RemoveHandler { handler_id } => {
 				// TODO: flush event loop
 				self.handlers.remove(handler_id);
+				// unregister timers
+				let mut timers = self.timers.write().unwrap();
+				let to_remove: Vec<_> = timers.keys().cloned().filter(|timer_id| timer_id / TOKENS_PER_HANDLER == handler_id).collect();
+				for timer_id in to_remove {
+					let timer = timers.remove(&timer_id).expect("to_remove only contains keys from timers; qed");
+					event_loop.clear_timeout(timer.timeout);
+				}
 			},
 			IoMessage::AddTimer { handler_id, token, delay } => {
 				let timer_id = token + handler_id * TOKENS_PER_HANDLER;
--- a/util/src/log.rs
+++ b/util/src/log.rs
@ -17,6 +17,7 @@
 //! Common log helper functions

 use std::env;
+use std::borrow::Cow;
 use rlog::{LogLevelFilter};
 use env_logger::LogBuilder;
 use std::sync::{RwLock, RwLockReadGuard};
@ -28,11 +29,19 @@ lazy_static! {
 	static ref USE_COLOR: AtomicBool = AtomicBool::new(false);
 }

-/// Paint, using colour if desired.
-pub fn paint(c: Style, t: String) -> String {
+/// Something which can be apply()ed.
+pub trait Applyable: AsRef<str> {
+	/// Apply the style `c` to ourself, returning us styled in that manner.
+	fn apply(&self, c: Style) -> Cow<str>;
+}
+
+impl<T: AsRef<str>> Applyable for T {
+    fn apply(&self, c: Style) -> Cow<str> {
+        let s = self.as_ref();
        match USE_COLOR.load(Ordering::Relaxed) {
-		true => format!("{}", c.paint(t)),
-		false => t,
+            true => Cow::Owned(format!("{}", c.paint(s))),
+            false => Cow::Borrowed(s),
+        }
    }
 }

--- a/util/src/network/host.rs
+++ b/util/src/network/host.rs
@ -32,8 +32,6 @@ use misc::version;
 use crypto::*;
 use sha3::Hashable;
 use rlp::*;
-use log::Colour::White;
-use log::paint;
 use network::session::{Session, SessionData};
 use error::*;
 use io::*;
@ -162,6 +160,8 @@ pub enum NetworkIoMessage<Message> where Message: Send + Sync + Clone {
 	Disconnect(PeerId),
 	/// Disconnect and temporary disable peer.
 	DisablePeer(PeerId),
+	/// Network has been started with the host as the given enode.
+	NetworkStarted(String),
 	/// User message
 	User(Message),
 }
@ -345,12 +345,13 @@ pub struct Host<Message> where Message: Send + Sync + Clone {
 	reserved_nodes: RwLock<HashSet<NodeId>>,
 	num_sessions: AtomicUsize,
 	stopping: AtomicBool,
-	first_time: AtomicBool,
 }

 impl<Message> Host<Message> where Message: Send + Sync + Clone {
 	/// Create a new instance
 	pub fn new(config: NetworkConfiguration, stats: Arc<NetworkStats>) -> Result<Host<Message>, UtilError> {
+		trace!(target: "host", "Creating new Host object");
+
 		let mut listen_address = match config.listen_address {
 			None => SocketAddr::from_str("0.0.0.0:30304").unwrap(),
 			Some(addr) => addr,
@ -401,7 +402,6 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 			reserved_nodes: RwLock::new(HashSet::new()),
 			num_sessions: AtomicUsize::new(0),
 			stopping: AtomicBool::new(false),
-			first_time: AtomicBool::new(true),
 		};

 		for n in boot_nodes {
@ -538,9 +538,8 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {

 		self.info.write().unwrap().public_endpoint = Some(public_endpoint.clone());

-		if self.first_time.load(AtomicOrdering::Relaxed) {
-			info!("Public node URL: {}", paint(White.bold(), self.external_url().unwrap()));
-			self.first_time.store(false, AtomicOrdering::Relaxed);
+		if let Some(url) = self.external_url() {
+			io.message(NetworkIoMessage::NetworkStarted(url)).unwrap_or_else(|e| warn!("Error sending IO notification: {:?}", e));
 		}

 		// Initialize discovery.
@ -1038,6 +1037,7 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 					h.message(&NetworkContext::new(io, p, None, self.sessions.clone(), &reserved), &message);
 				}
 			}
+			_ => {}	// ignore others.
 		}
 	}

--- a/util/src/network/service.rs
+++ b/util/src/network/service.rs
@ -78,6 +78,11 @@ impl<Message> NetworkService<Message> where Message: Send + Sync + Clone + 'stat
 		&self.stats
 	}

+	/// Returns network configuration.
+	pub fn config(&self) -> &NetworkConfiguration {
+		&self.config
+	}
+
 	/// Returns external url if available.
 	pub fn external_url(&self) -> Option<String> {
 		let host = self.host.read().unwrap();