Merge branch 'master' into rotating-key

Conflicts:
	ethstore/src/ethstore.rs
	ethstore/src/secret_store.rs

.gitlab-ci.yml

@@ -422,13 +422,10 @@ test-rust-stable:
   image: ethcore/rust:stable
   before_script:
     - git submodule update --init --recursive
-    - export JS_FILES_MODIFIED=$(git --no-pager diff --name-only $CI_BUILD_REF^ $CI_BUILD_REF | grep \.js | wc -l)
-    - echo $JS_FILES_MODIFIED
-    - if [ "$JS_FILES_MODIFIED" = 0  ]; then echo "skip js test"; else ./js/scripts/install-deps.sh;fi
+    - export RUST_FILES_MODIFIED=$(git --no-pager diff --name-only $CI_BUILD_REF^ $CI_BUILD_REF | grep -v ^js/ | wc -l)
   script:
     - export RUST_BACKTRACE=1
-    - echo $JS_FILES_MODIFIED
-    - if [ "$JS_FILES_MODIFIED" = 0 ]; then echo "skip js test"&./test.sh $CARGOFLAGS; else echo "skip rust test"&./js/scripts/lint.sh&./js/scripts/test.sh&./js/scripts/build.sh; fi
+    - if [ "$RUST_FILES_MODIFIED" = 0 ]; then echo "Skipping Rust tests since no Rust files modified."; else ./test.sh $CARGOFLAGS; fi
   tags:
     - rust
     - rust-stable
@@ -437,13 +434,10 @@ js-test:
   image: ethcore/rust:stable
   before_script:
     - git submodule update --init --recursive
-    - export JS_FILES_MODIFIED=$(git --no-pager diff --name-only $CI_BUILD_REF^ $CI_BUILD_REF | grep \.js | wc -l)
-    - echo $JS_FILES_MODIFIED
-    - if [ "$JS_FILES_MODIFIED" = 0 ]; then echo "skip js test"; else ./js/scripts/install-deps.sh;fi
+    - export JS_FILES_MODIFIED=$(git --no-pager diff --name-only $CI_BUILD_REF^ $CI_BUILD_REF | grep ^js/ | wc -l)
+    - if [ "$JS_FILES_MODIFIED" = 0 ]; then echo "Skipping JS deps install since no JS files modified."; else ./js/scripts/install-deps.sh;fi
   script:
-    - export RUST_BACKTRACE=1
-    - echo $JS_FILES_MODIFIED
-    - if [ "$JS_FILES_MODIFIED" = 0 ]; then echo "skip js test"; else echo "skip rust test"&./js/scripts/lint.sh&./js/scripts/test.sh&./js/scripts/build.sh; fi
+    - if [ "$JS_FILES_MODIFIED" = 0 ]; then echo "Skipping JS lint since no JS files modified."; else ./js/scripts/lint.sh && ./js/scripts/test.sh && ./js/scripts/build.sh; fi
   tags:
     - rust
     - rust-stable
@@ -484,11 +478,11 @@ js-release:
     - stable
   image: ethcore/rust:stable
   before_script:
-    - export JS_FILES_MODIFIED=$(git --no-pager diff --name-only $CI_BUILD_REF^ $CI_BUILD_REF | grep \.js | wc -l)
+    - export JS_FILES_MODIFIED=$(git --no-pager diff --name-only $CI_BUILD_REF^ $CI_BUILD_REF | grep ^js/ | wc -l)
     - echo $JS_FILES_MODIFIED
-    - if [ "$JS_FILES_MODIFIED" = 0  ]; then echo "skip js build"; else ./js/scripts/install-deps.sh;fi
+    - if [ "$JS_FILES_MODIFIED" = 0  ]; then echo "Skipping JS deps install since no JS files modified."; else ./js/scripts/install-deps.sh;fi
   script:
     - echo $JS_FILES_MODIFIED
-    - if [ "$JS_FILES_MODIFIED" = 0 ]; then echo "skip js build"; else ./js/scripts/build.sh&&./js/scripts/release.sh; fi
+    - if [ "$JS_FILES_MODIFIED" = 0 ]; then echo "Skipping JS rebuild since no JS files modified."; else ./js/scripts/build.sh && ./js/scripts/release.sh; fi
   tags:
     - javascript

Cargo.lock

@@ -18,6 +18,7 @@ dependencies = [
  "ethcore-ipc-hypervisor 1.2.0",
  "ethcore-ipc-nano 1.5.0",
  "ethcore-ipc-tests 0.1.0",
+ "ethcore-light 1.5.0",
  "ethcore-logger 1.5.0",
  "ethcore-rpc 1.5.0",
  "ethcore-signer 1.5.0",
@@ -456,6 +457,21 @@ dependencies = [
  "semver 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "ethcore-light"
+version = "1.5.0"
+dependencies = [
+ "ethcore 1.5.0",
+ "ethcore-io 1.5.0",
+ "ethcore-ipc 1.5.0",
+ "ethcore-ipc-codegen 1.5.0",
+ "ethcore-network 1.5.0",
+ "ethcore-util 1.5.0",
+ "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rlp 0.1.0",
+ "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "ethcore-logger"
 version = "1.5.0"
@@ -660,12 +676,15 @@ dependencies = [
  "clippy 0.0.103 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethcore 1.5.0",
+ "ethcore-devtools 1.5.0",
  "ethcore-io 1.5.0",
  "ethcore-ipc 1.5.0",
  "ethcore-ipc-codegen 1.5.0",
  "ethcore-ipc-nano 1.5.0",
+ "ethcore-light 1.5.0",
  "ethcore-network 1.5.0",
  "ethcore-util 1.5.0",
+ "ethkey 0.2.0",
  "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1271,7 +1290,7 @@ dependencies = [
 [[package]]
 name = "parity-ui-precompiled"
 version = "1.4.0"
-source = "git+https://github.com/ethcore/js-precompiled.git#1bf7160f6c8f25353d790dbd0935560d3d395727"
+source = "git+https://github.com/ethcore/js-precompiled.git#3d3b2f9e8e8b0fd62c172240bfd001a317cf2979"
 dependencies = [
  "parity-dapps-glue 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

Cargo.toml

@@ -47,6 +47,7 @@ rlp = { path = "util/rlp" }
 ethcore-stratum = { path = "stratum" }
 ethcore-dapps = { path = "dapps", optional = true }
 clippy = { version = "0.0.103", optional = true}
+ethcore-light = { path = "ethcore/light" }
 
 [target.'cfg(windows)'.dependencies]
 winapi = "0.2"

ethcore/light/Cargo.toml

@@ -8,14 +8,18 @@ authors = ["Ethcore <admin@ethcore.io>"]
 build = "build.rs"
 
 [build-dependencies]
-"ethcore-ipc-codegen" = { path = "../../ipc/codegen" }
+"ethcore-ipc-codegen" = { path = "../../ipc/codegen", optional = true }
 
 [dependencies]
 log = "0.3"
-ethcore = { path = ".." }
+ethcore = { path = ".."}
 ethcore-util = { path = "../../util" }
 ethcore-network = { path = "../../util/network" }
 ethcore-io = { path = "../../util/io" }
-ethcore-ipc = { path = "../../ipc/rpc" }
+ethcore-ipc = { path = "../../ipc/rpc", optional = true }
 rlp = { path = "../../util/rlp" }
 time = "0.1"
+
+[features]
+default = []
+ipc = ["ethcore-ipc", "ethcore-ipc-codegen"]

ethcore/light/build.rs

@@ -14,8 +14,14 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+#[cfg(feature = "ipc")]
 extern crate ethcore_ipc_codegen;
 
+#[cfg(feature = "ipc")]
 fn main() {
 	ethcore_ipc_codegen::derive_binary("src/types/mod.rs.in").unwrap();
+	ethcore_ipc_codegen::derive_ipc_cond("src/provider.rs", true).unwrap();
 }
+
+#[cfg(not(feature = "ipc"))]
+fn main() { }

ethcore/light/src/client.rs

@@ -20,7 +20,7 @@
 use std::sync::Arc;
 
 use ethcore::engines::Engine;
-use ethcore::ids::BlockID;
+use ethcore::ids::BlockId;
 use ethcore::service::ClientIoMessage;
 use ethcore::block_import_error::BlockImportError;
 use ethcore::block_status::BlockStatus;
@@ -51,7 +51,7 @@ impl Client {
 	}
 
 	/// Whether the block is already known (but not necessarily part of the canonical chain)
-	pub fn is_known(&self, _id: BlockID) -> bool {
+	pub fn is_known(&self, _id: BlockId) -> bool {
 		false
 	}
 
@@ -61,7 +61,7 @@ impl Client {
 	}
 
 	/// Inquire about the status of a given block.
-	pub fn status(&self, _id: BlockID) -> BlockStatus {
+	pub fn status(&self, _id: BlockId) -> BlockStatus {
 		BlockStatus::Unknown
 	}
 

ethcore/light/src/lib.rs

@@ -33,8 +33,21 @@
 
 pub mod client;
 pub mod net;
+
+#[cfg(not(feature = "ipc"))]
 pub mod provider;
 
+#[cfg(feature = "ipc")]
+pub mod provider {
+    #![allow(dead_code, unused_assignments, unused_variables, missing_docs)] // codegen issues
+	include!(concat!(env!("OUT_DIR"), "/provider.rs"));
+}
+
+#[cfg(feature = "ipc")]
+pub mod remote {
+    pub use provider::LightProviderClient;
+}
+
 mod types;
 
 pub use self::provider::Provider;
@@ -47,6 +60,8 @@ extern crate ethcore;
 extern crate ethcore_util as util;
 extern crate ethcore_network as network;
 extern crate ethcore_io as io;
-extern crate ethcore_ipc as ipc;
 extern crate rlp;
 extern crate time;
+
+#[cfg(feature = "ipc")]
+extern crate ethcore_ipc as ipc;

ethcore/light/src/net/buffer_flow.rs

@@ -22,6 +22,9 @@
 //!
 //! This module provides an interface for configuration of buffer
 //! flow costs and recharge rates.
+//!
+//! Current default costs are picked completely arbitrarily, not based 
+//! on any empirical timings or mathematical models.
 
 use request;
 use super::packet;
@@ -273,6 +276,16 @@ impl FlowParams {
 	}
 }
 
+impl Default for FlowParams {
+	fn default() -> Self {
+		FlowParams {
+			limit: 50_000_000.into(),
+			costs: CostTable::default(),
+			recharge: 100_000.into(),
+		}
+	}
+}
+
 #[cfg(test)]
 mod tests {
 	use super::*;

ethcore/light/src/net/context.rs

@@ -0,0 +1,120 @@
+// 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/>.
+
+//! I/O and event context generalizations.
+
+use network::{NetworkContext, PeerId};
+
+use super::{Announcement, LightProtocol, ReqId};
+use super::error::Error;
+use request::Request;
+
+/// An I/O context which allows sending and receiving packets as well as 
+/// disconnecting peers. This is used as a generalization of the portions
+/// of a p2p network which the light protocol structure makes use of.
+pub trait IoContext {
+    /// Send a packet to a specific peer.
+    fn send(&self, peer: PeerId, packet_id: u8, packet_body: Vec<u8>);
+
+    /// Respond to a peer's message. Only works if this context is a byproduct
+    /// of a packet handler.
+    fn respond(&self, packet_id: u8, packet_body: Vec<u8>);
+
+    /// Disconnect a peer.
+    fn disconnect_peer(&self, peer: PeerId);
+
+    /// Disable a peer -- this is a disconnect + a time-out.
+    fn disable_peer(&self, peer: PeerId);
+
+    /// Get a peer's protocol version.
+    fn protocol_version(&self, peer: PeerId) -> Option<u8>;
+}
+
+impl<'a> IoContext for NetworkContext<'a> {
+    fn send(&self, peer: PeerId, packet_id: u8, packet_body: Vec<u8>) {
+        if let Err(e) = self.send(peer, packet_id, packet_body) {
+            debug!(target: "les", "Error sending packet to peer {}: {}", peer, e);
+        }
+    }
+
+    fn respond(&self, packet_id: u8, packet_body: Vec<u8>) {
+        if let Err(e) = self.respond(packet_id, packet_body) {
+            debug!(target: "les", "Error responding to peer message: {}", e);
+        }
+    }
+
+    fn disconnect_peer(&self, peer: PeerId) {
+        NetworkContext::disconnect_peer(self, peer);
+    }
+
+    fn disable_peer(&self, peer: PeerId) {
+        NetworkContext::disable_peer(self, peer);
+    }
+
+    fn protocol_version(&self, peer: PeerId) -> Option<u8> {
+        self.protocol_version(self.subprotocol_name(), peer)
+    }
+}
+
+/// Context for a protocol event.
+pub trait EventContext {
+    /// Get the peer relevant to the event e.g. message sender,
+    /// disconnected/connected peer.
+    fn peer(&self) -> PeerId;
+
+    /// Make a request from a peer.
+    fn request_from(&self, peer: PeerId, request: Request) -> Result<ReqId, Error>;
+
+    /// Make an announcement of new capabilities to the rest of the peers.
+    // TODO: maybe just put this on a timer in LightProtocol?
+    fn make_announcement(&self, announcement: Announcement);
+
+    /// Disconnect a peer.
+    fn disconnect_peer(&self, peer: PeerId);
+
+    /// Disable a peer.
+    fn disable_peer(&self, peer: PeerId);
+}
+
+/// Concrete implementation of `EventContext` over the light protocol struct and 
+/// an io context.
+pub struct Ctx<'a> {
+    /// Io context to enable immediate response to events.
+    pub io: &'a IoContext,
+    /// Protocol implementation.
+    pub proto: &'a LightProtocol,
+    /// Relevant peer for event.
+    pub peer: PeerId, 
+}
+
+impl<'a> EventContext for Ctx<'a> {
+    fn peer(&self) -> PeerId { self.peer }
+    fn request_from(&self, peer: PeerId, request: Request) -> Result<ReqId, Error> {
+        self.proto.request_from(self.io, &peer, request)
+    }
+
+    fn make_announcement(&self, announcement: Announcement) {
+        self.proto.make_announcement(self.io, announcement);
+    }
+
+    fn disconnect_peer(&self, peer: PeerId) {
+        self.io.disconnect_peer(peer);
+    }
+
+    fn disable_peer(&self, peer: PeerId) {
+        self.io.disable_peer(peer);
+    }
+}

ethcore/light/src/net/error.rs

@@ -54,6 +54,14 @@ pub enum Error {
 	WrongNetwork,
 	/// Unknown peer.
 	UnknownPeer,
+	/// Unsolicited response.
+	UnsolicitedResponse,
+	/// Not a server.
+	NotServer,
+	/// Unsupported protocol version.
+	UnsupportedProtocolVersion(u8),
+	/// Bad protocol version.
+	BadProtocolVersion,
 }
 
 impl Error {
@@ -67,6 +75,10 @@ impl Error {
 			Error::UnexpectedHandshake => Punishment::Disconnect,
 			Error::WrongNetwork => Punishment::Disable,
 			Error::UnknownPeer => Punishment::Disconnect,
+			Error::UnsolicitedResponse => Punishment::Disable,
+			Error::NotServer => Punishment::Disable,
+			Error::UnsupportedProtocolVersion(_) => Punishment::Disable,
+			Error::BadProtocolVersion => Punishment::Disable,
 		}
 	}
 }
@@ -92,7 +104,11 @@ impl fmt::Display for Error {
 			Error::UnrecognizedPacket(code) => write!(f, "Unrecognized packet: 0x{:x}", code),
 			Error::UnexpectedHandshake => write!(f, "Unexpected handshake"),
 			Error::WrongNetwork => write!(f, "Wrong network"),
-			Error::UnknownPeer => write!(f, "unknown peer"),
+			Error::UnknownPeer => write!(f, "Unknown peer"),
+			Error::UnsolicitedResponse => write!(f, "Peer provided unsolicited data"),
+			Error::NotServer => write!(f, "Peer not a server."),
+			Error::UnsupportedProtocolVersion(pv) => write!(f, "Unsupported protocol version: {}", pv),	
+			Error::BadProtocolVersion => write!(f, "Bad protocol version in handshake"),
 		}
 	}
 }

ethcore/light/src/net/mod.rs

@@ -20,36 +20,51 @@
 //! See https://github.com/ethcore/parity/wiki/Light-Ethereum-Subprotocol-(LES)
 
 use ethcore::transaction::SignedTransaction;
+use ethcore::receipt::Receipt;
+
 use io::TimerToken;
-use network::{NetworkProtocolHandler, NetworkContext, NetworkError, PeerId};
+use network::{NetworkProtocolHandler, NetworkContext, PeerId};
 use rlp::{RlpStream, Stream, UntrustedRlp, View};
 use util::hash::H256;
-use util::{Mutex, RwLock, U256};
-use time::SteadyTime;
+use util::{Bytes, Mutex, RwLock, U256};
+use time::{Duration, SteadyTime};
 
-use std::collections::{HashMap, HashSet};
+use std::collections::HashMap;
+use std::sync::Arc;
 use std::sync::atomic::{AtomicUsize, Ordering};
 
 use provider::Provider;
 use request::{self, Request};
 
 use self::buffer_flow::{Buffer, FlowParams};
+use self::context::Ctx;
 use self::error::{Error, Punishment};
 
 mod buffer_flow;
+mod context;
 mod error;
 mod status;
 
-pub use self::status::{Status, Capabilities, Announcement, NetworkId};
+#[cfg(test)]
+mod tests;
+
+pub use self::context::{EventContext, IoContext};
+pub use self::status::{Status, Capabilities, Announcement};
 
 const TIMEOUT: TimerToken = 0;
 const TIMEOUT_INTERVAL_MS: u64 = 1000;
 
-// LPV1
-const PROTOCOL_VERSION: u32 = 1;
+// minimum interval between updates.
+const UPDATE_INTERVAL_MS: i64 = 5000;
 
-// TODO [rob] make configurable.
-const PROTOCOL_ID: [u8; 3] = *b"les";
+// Supported protocol versions.
+pub const PROTOCOL_VERSIONS: &'static [u8] = &[1];
+
+// Max protocol version.
+pub const MAX_PROTOCOL_VERSION: u8 = 1;
+
+// Packet count for LES.
+pub const PACKET_COUNT: u8 = 15;
 
 // packet ID definitions.
 mod packet {
@@ -95,17 +110,19 @@ pub struct ReqId(usize);
 // may not have received one for.
 struct PendingPeer {
 	sent_head: H256,
+	last_update: SteadyTime,
+	proto_version: u8,
 }
 
 // data about each peer.
 struct Peer {
 	local_buffer: Buffer, // their buffer relative to us
-	remote_buffer: Buffer, // our buffer relative to them
-	current_asking: HashSet<usize>, // pending request ids.
 	status: Status,
 	capabilities: Capabilities,
-	remote_flow: FlowParams,
+	remote_flow: Option<(Buffer, FlowParams)>,
 	sent_head: H256, // last head we've given them.
+	last_update: SteadyTime,
+	proto_version: u8,
 }
 
 impl Peer {
@@ -126,38 +143,56 @@ impl Peer {
 
 		self.local_buffer.current()
 	}
-
-	// recharge remote buffer with remote flow params.
-	fn recharge_remote(&mut self) {
-		let flow = &mut self.remote_flow;
-		flow.recharge(&mut self.remote_buffer);
-	}
 }
 
 /// An LES event handler.
+///
+/// Each handler function takes a context which describes the relevant peer 
+/// and gives references to the IO layer and protocol structure so new messages
+/// can be dispatched immediately.
+///
+/// Request responses are not guaranteed to be complete or valid, but passed IDs will be correct.
+/// Response handlers are not given a copy of the original request; it is assumed
+/// that relevant data will be stored by interested handlers.
 pub trait Handler: Send + Sync {
 	/// Called when a peer connects.
-	fn on_connect(&self, _id: PeerId, _status: &Status, _capabilities: &Capabilities) { }
-	/// Called when a peer disconnects
-	fn on_disconnect(&self, _id: PeerId) { }
+	fn on_connect(&self, _ctx: &EventContext, _status: &Status, _capabilities: &Capabilities) { }
+	/// Called when a peer disconnects, with a list of unfulfilled request IDs as
+	/// of yet.
+	fn on_disconnect(&self, _ctx: &EventContext, _unfulfilled: &[ReqId]) { }
 	/// Called when a peer makes an announcement.
-	fn on_announcement(&self, _id: PeerId, _announcement: &Announcement) { }
+	fn on_announcement(&self, _ctx: &EventContext, _announcement: &Announcement) { }
 	/// Called when a peer requests relay of some transactions.
-	fn on_transactions(&self, _id: PeerId, _relay: &[SignedTransaction]) { }
+	fn on_transactions(&self, _ctx: &EventContext, _relay: &[SignedTransaction]) { }
+	/// Called when a peer responds with block bodies.
+	fn on_block_bodies(&self, _ctx: &EventContext, _req_id: ReqId, _bodies: &[Bytes]) { }
+	/// Called when a peer responds with block headers.
+	fn on_block_headers(&self, _ctx: &EventContext, _req_id: ReqId, _headers: &[Bytes]) { }
+	/// Called when a peer responds with block receipts.
+	fn on_receipts(&self, _ctx: &EventContext, _req_id: ReqId, _receipts: &[Vec<Receipt>]) { }
+	/// Called when a peer responds with state proofs. Each proof is a series of trie
+	/// nodes in ascending order by distance from the root.
+	fn on_state_proofs(&self, _ctx: &EventContext, _req_id: ReqId, _proofs: &[Vec<Bytes>]) { }
+	/// Called when a peer responds with contract code.
+	fn on_code(&self, _ctx: &EventContext, _req_id: ReqId, _codes: &[Bytes]) { }
+	/// Called when a peer responds with header proofs. Each proof is a block header coupled 
+	/// with a series of trie nodes is ascending order by distance from the root.
+	fn on_header_proofs(&self, _ctx: &EventContext, _req_id: ReqId, _proofs: &[(Bytes, Vec<Bytes>)]) { }
+	/// Called on abort.
+	fn on_abort(&self) { }
 }
 
-// a request and the time it was made.
+// a request, the peer who it was made to, and the time it was made.
 struct Requested {
 	request: Request,
 	timestamp: SteadyTime,
+	peer_id: PeerId,
 }
 
 /// Protocol parameters.
 pub struct Params {
-	/// Genesis hash.
-	pub genesis_hash: H256,
 	/// Network id.
-	pub network_id: NetworkId,
+	pub network_id: u64,
 	/// Buffer flow parameters.
 	pub flow_params: FlowParams,
 	/// Initial capabilities.
@@ -175,9 +210,9 @@ pub struct Params {
 //   Locks must be acquired in the order declared, and when holding a read lock 
 //   on the peers, only one peer may be held at a time.
 pub struct LightProtocol {
-	provider: Box<Provider>,
+	provider: Arc<Provider>,
 	genesis_hash: H256,
-	network_id: NetworkId,
+	network_id: u64,
 	pending_peers: RwLock<HashMap<PeerId, PendingPeer>>,
 	peers: RwLock<HashMap<PeerId, Mutex<Peer>>>,
 	pending_requests: RwLock<HashMap<usize, Requested>>,
@@ -189,10 +224,13 @@ pub struct LightProtocol {
 
 impl LightProtocol {
 	/// Create a new instance of the protocol manager.
-	pub fn new(provider: Box<Provider>, params: Params) -> Self {
+	pub fn new(provider: Arc<Provider>, params: Params) -> Self {
+		debug!(target: "les", "Initializing LES handler");
+
+		let genesis_hash = provider.chain_info().genesis_hash;
 		LightProtocol {
 			provider: provider,
-			genesis_hash: params.genesis_hash,
+			genesis_hash: genesis_hash,
 			network_id: params.network_id,
 			pending_peers: RwLock::new(HashMap::new()),
 			peers: RwLock::new(HashMap::new()),
@@ -207,28 +245,37 @@ impl LightProtocol {
 	/// Check the maximum amount of requests of a specific type 
 	/// which a peer would be able to serve.
 	pub fn max_requests(&self, peer: PeerId, kind: request::Kind) -> Option<usize> {
-		self.peers.read().get(&peer).map(|peer| {
+		self.peers.read().get(&peer).and_then(|peer| {
 			let mut peer = peer.lock();
-			peer.recharge_remote();
-			peer.remote_flow.max_amount(&peer.remote_buffer, kind)
+			match peer.remote_flow.as_mut() {
+				Some(&mut (ref mut buf, ref flow)) => {
+					flow.recharge(buf);
+					Some(flow.max_amount(&*buf, kind))
+				}
+				None => None,
+			}
 		})
 	}
 
 	/// Make a request to a peer. 
 	///
-	/// Fails on: nonexistent peer, network error,
+	/// Fails on: nonexistent peer, network error, peer not server,
 	/// insufficient buffer. Does not check capabilities before sending.
 	/// On success, returns a request id which can later be coordinated 
 	/// with an event.
-	pub fn request_from(&self, io: &NetworkContext, peer_id: &PeerId, request: Request) -> Result<ReqId, Error> {
+	pub fn request_from(&self, io: &IoContext, peer_id: &PeerId, request: Request) -> Result<ReqId, Error> {
 		let peers = self.peers.read();
 		let peer = try!(peers.get(peer_id).ok_or_else(|| Error::UnknownPeer));
 		let mut peer = peer.lock();
 
-		peer.recharge_remote();
-
-		let max = peer.remote_flow.compute_cost(request.kind(), request.amount());
-		try!(peer.remote_buffer.deduct_cost(max));
+		match peer.remote_flow.as_mut() {
+			Some(&mut (ref mut buf, ref flow)) => {
+				flow.recharge(buf);
+				let max = flow.compute_cost(request.kind(), request.amount());
+				try!(buf.deduct_cost(max));
+			}
+			None => return Err(Error::NotServer),
+		}
 
 		let req_id = self.req_id.fetch_add(1, Ordering::SeqCst);
 		let packet_data = encode_request(&request, req_id);
@@ -242,12 +289,12 @@ impl LightProtocol {
 			request::Kind::HeaderProofs => packet::GET_HEADER_PROOFS,
 		};
 
-		try!(io.send(*peer_id, packet_id, packet_data));
+		io.send(*peer_id, packet_id, packet_data);
 
-		peer.current_asking.insert(req_id);
 		self.pending_requests.write().insert(req_id, Requested {
 			request: request,
 			timestamp: SteadyTime::now(),
+			peer_id: *peer_id,
 		});
 
 		Ok(ReqId(req_id))
@@ -255,8 +302,9 @@ impl LightProtocol {
 
 	/// Make an announcement of new chain head and capabilities to all peers.
 	/// The announcement is expected to be valid.
-	pub fn make_announcement(&self, io: &NetworkContext, mut announcement: Announcement) {
+	pub fn make_announcement(&self, io: &IoContext, mut announcement: Announcement) {
 		let mut reorgs_map = HashMap::new();
+		let now = SteadyTime::now();
 
 		// update stored capabilities
 		self.capabilities.write().update_from(&announcement);
@@ -264,6 +312,17 @@ impl LightProtocol {
 		// calculate reorg info and send packets
 		for (peer_id, peer_info) in self.peers.read().iter() {
 			let mut peer_info = peer_info.lock();
+
+			// TODO: "urgent" announcements like new blocks?
+			// the timer approach will skip 1 (possibly 2) in rare occasions.
+			if peer_info.sent_head == announcement.head_hash || 
+				peer_info.status.head_num >= announcement.head_num  ||
+				now - peer_info.last_update < Duration::milliseconds(UPDATE_INTERVAL_MS) {
+				continue 
+			}
+
+			peer_info.last_update = now;
+
 			let reorg_depth = reorgs_map.entry(peer_info.sent_head)
 				.or_insert_with(|| {
 					match self.provider.reorg_depth(&announcement.head_hash, &peer_info.sent_head) {
@@ -281,26 +340,133 @@ impl LightProtocol {
 			peer_info.sent_head = announcement.head_hash;
 			announcement.reorg_depth = *reorg_depth;
 
-			if let Err(e) = io.send(*peer_id, packet::ANNOUNCE, status::write_announcement(&announcement)) {
-				debug!(target: "les", "Error sending to peer {}: {}", peer_id, e);
-			}
+			io.send(*peer_id, packet::ANNOUNCE, status::write_announcement(&announcement));
 		}
 	}
 
 	/// Add an event handler.
 	/// Ownership will be transferred to the protocol structure,
 	/// and the handler will be kept alive as long as it is.
-	/// These are intended to be added at the beginning of the 
+	/// These are intended to be added when the protocol structure 
+	/// is initialized as a means of customizing its behavior.
 	pub fn add_handler(&mut self, handler: Box<Handler>) {
 		self.handlers.push(handler);
 	}
+
+	/// Signal to handlers that network activity is being aborted
+	/// and clear peer data.
+	pub fn abort(&self) {
+		for handler in &self.handlers {
+			handler.on_abort();
+		}
+
+		// acquire in order and hold.
+		let mut pending_peers = self.pending_peers.write();
+		let mut peers = self.peers.write();
+		let mut pending_requests = self.pending_requests.write();
+
+		pending_peers.clear();
+		peers.clear();
+		pending_requests.clear();
+	}
+
+	// Does the common pre-verification of responses before the response itself 
+	// is actually decoded:
+	//   - check whether peer exists
+	//   - check whether request was made
+	//   - check whether request kinds match
+	fn pre_verify_response(&self, peer: &PeerId, kind: request::Kind, raw: &UntrustedRlp) -> Result<ReqId, Error> {
+		let req_id: usize = try!(raw.val_at(0));
+		let cur_buffer: U256 = try!(raw.val_at(1));
+
+		trace!(target: "les", "pre-verifying response from peer {}, kind={:?}", peer, kind);
+
+		match self.pending_requests.write().remove(&req_id) {
+			None => return Err(Error::UnsolicitedResponse),
+			Some(requested) => {
+				if requested.peer_id != *peer || requested.request.kind() != kind {
+					return Err(Error::UnsolicitedResponse)
+				}
+			}
+		}
+
+		let peers = self.peers.read();
+		match peers.get(peer) {
+			Some(peer_info) => {
+				let mut peer_info = peer_info.lock();
+				match peer_info.remote_flow.as_mut() {
+					Some(&mut (ref mut buf, ref mut flow)) => {
+						let actual_buffer = ::std::cmp::min(cur_buffer, *flow.limit());				
+						buf.update_to(actual_buffer)
+					}
+					None => return Err(Error::NotServer), // this really should be impossible.
+				}
+				Ok(ReqId(req_id))
+			}
+			None => Err(Error::UnknownPeer), // probably only occurs in a race of some kind.
+		}
+	}
+
+	// handle a packet using the given io context.
+	fn handle_packet(&self, io: &IoContext, peer: &PeerId, packet_id: u8, data: &[u8]) {
+		let rlp = UntrustedRlp::new(data);
+
+		trace!(target: "les", "Incoming packet {} from peer {}", packet_id, peer);
+
+		// handle the packet
+		let res = match packet_id {
+			packet::STATUS => self.status(peer, io, rlp),
+			packet::ANNOUNCE => self.announcement(peer, io, rlp),
+
+			packet::GET_BLOCK_HEADERS => self.get_block_headers(peer, io, rlp),
+			packet::BLOCK_HEADERS => self.block_headers(peer, io, rlp),
+
+			packet::GET_BLOCK_BODIES => self.get_block_bodies(peer, io, rlp),
+			packet::BLOCK_BODIES => self.block_bodies(peer, io, rlp),
+
+			packet::GET_RECEIPTS => self.get_receipts(peer, io, rlp),
+			packet::RECEIPTS => self.receipts(peer, io, rlp),
+
+			packet::GET_PROOFS => self.get_proofs(peer, io, rlp),
+			packet::PROOFS => self.proofs(peer, io, rlp),
+
+			packet::GET_CONTRACT_CODES => self.get_contract_code(peer, io, rlp),
+			packet::CONTRACT_CODES => self.contract_code(peer, io, rlp),
+
+			packet::GET_HEADER_PROOFS => self.get_header_proofs(peer, io, rlp),
+			packet::HEADER_PROOFS => self.header_proofs(peer, io, rlp),
+
+			packet::SEND_TRANSACTIONS => self.relay_transactions(peer, io, rlp),
+
+			other => {
+				Err(Error::UnrecognizedPacket(other))
+			}
+		};
+
+		// if something went wrong, figure out how much to punish the peer.
+		if let Err(e) = res {
+			match e.punishment() {
+				Punishment::None => {}
+				Punishment::Disconnect => {
+					debug!(target: "les", "Disconnecting peer {}: {}", peer, e);
+					io.disconnect_peer(*peer)
+				}
+				Punishment::Disable => {
+					debug!(target: "les", "Disabling peer {}: {}", peer, e);
+					io.disable_peer(*peer)
+				}
+			}
+		}
+	}
 }
 
 impl LightProtocol {
 	// called when a peer connects.
-	fn on_connect(&self, peer: &PeerId, io: &NetworkContext) {
+	fn on_connect(&self, peer: &PeerId, io: &IoContext) {
 		let peer = *peer;
 
+		trace!(target: "les", "Peer {} connecting", peer);
+
 		match self.send_status(peer, io) {
 			Ok(pending_peer) => {
 				self.pending_peers.write().insert(peer, pending_peer);
@@ -313,44 +479,69 @@ impl LightProtocol {
 	}
 
 	// called when a peer disconnects.
-	fn on_disconnect(&self, peer: PeerId) {
-		// TODO: reassign all requests assigned to this peer.
+	fn on_disconnect(&self, peer: PeerId, io: &IoContext) {
+		trace!(target: "les", "Peer {} disconnecting", peer);
+
+
 		self.pending_peers.write().remove(&peer);
 		if self.peers.write().remove(&peer).is_some() {
+			let unfulfilled: Vec<_> = self.pending_requests.read()
+				.iter()
+				.filter(|&(_, r)| r.peer_id == peer)
+				.map(|(&id, _)| ReqId(id))
+				.collect();
+
+			{
+				let mut pending = self.pending_requests.write();
+				for &ReqId(ref inner) in &unfulfilled {
+					pending.remove(inner);
+				}
+			}
+
 			for handler in &self.handlers {
-				handler.on_disconnect(peer)
+				handler.on_disconnect(&Ctx {
+					peer: peer,
+					io: io,
+					proto: self,
+				}, &unfulfilled)
 			}	
 		}
 	}
 
 	// send status to a peer.
-	fn send_status(&self, peer: PeerId, io: &NetworkContext) -> Result<PendingPeer, NetworkError> {
-		let chain_info = self.provider.chain_info();
+	fn send_status(&self, peer: PeerId, io: &IoContext) -> Result<PendingPeer, Error> {
+		let proto_version = try!(io.protocol_version(peer).ok_or(Error::WrongNetwork));
 
-		// TODO: could update capabilities here.
+		if PROTOCOL_VERSIONS.iter().find(|x| **x == proto_version).is_none() {
+			return Err(Error::UnsupportedProtocolVersion(proto_version));
+		}
+		
+		let chain_info = self.provider.chain_info();
 
 		let status = Status {
 			head_td: chain_info.total_difficulty,
 			head_hash: chain_info.best_block_hash,
 			head_num: chain_info.best_block_number,
 			genesis_hash: chain_info.genesis_hash,
-			protocol_version: PROTOCOL_VERSION,
+			protocol_version: proto_version as u32, // match peer proto version
 			network_id: self.network_id,
 			last_head: None,
 		};
 
 		let capabilities = self.capabilities.read().clone();
-		let status_packet = status::write_handshake(&status, &capabilities, &self.flow_params);
+		let status_packet = status::write_handshake(&status, &capabilities, Some(&self.flow_params));
 
-		try!(io.send(peer, packet::STATUS, status_packet));
+		io.send(peer, packet::STATUS, status_packet);
 
 		Ok(PendingPeer {
 			sent_head: chain_info.best_block_hash,
+			last_update: SteadyTime::now(),
+			proto_version: proto_version,			
 		})
 	}
 
 	// Handle status message from peer.
-	fn status(&self, peer: &PeerId, data: UntrustedRlp) -> Result<(), Error> {
+	fn status(&self, peer: &PeerId, io: &IoContext, data: UntrustedRlp) -> Result<(), Error> {
 		let pending = match self.pending_peers.write().remove(peer) {
 			Some(pending) => pending,
 			None => {
@@ -366,33 +557,45 @@ impl LightProtocol {
 			return Err(Error::WrongNetwork);
 		}
 
+		if Some(status.protocol_version as u8) != io.protocol_version(*peer) {
+			return Err(Error::BadProtocolVersion);
+		}
+
+		let remote_flow = flow_params.map(|params| (params.create_buffer(), params));
+
 		self.peers.write().insert(*peer, Mutex::new(Peer {
 			local_buffer: self.flow_params.create_buffer(),
-			remote_buffer: flow_params.create_buffer(),
-			current_asking: HashSet::new(),
 			status: status.clone(),
 			capabilities: capabilities.clone(),
-			remote_flow: flow_params,
+			remote_flow: remote_flow,
 			sent_head: pending.sent_head,
+			last_update: pending.last_update,
+			proto_version: pending.proto_version,
 		}));
 
 		for handler in &self.handlers {
-			handler.on_connect(*peer, &status, &capabilities)
+			handler.on_connect(&Ctx {
+				peer: *peer,
+				io: io,	
+				proto: self,
+			}, &status, &capabilities)
 		}
 
 		Ok(())
 	}
 
 	// Handle an announcement.
-	fn announcement(&self, peer: &PeerId, data: UntrustedRlp) -> Result<(), Error> {
+	fn announcement(&self, peer: &PeerId, io: &IoContext, data: UntrustedRlp) -> Result<(), Error> {
 		if !self.peers.read().contains_key(peer) {
 			debug!(target: "les", "Ignoring announcement from unknown peer");
 			return Ok(())
 		}
 
 		let announcement = try!(status::parse_announcement(data));
-		let peers = self.peers.read();
 
+		// scope to ensure locks are dropped before moving into handler-space.
+		{
+			let peers = self.peers.read();
 			let peer_info = match peers.get(peer) {
 				Some(info) => info,
 				None => return Ok(()),
@@ -413,16 +616,21 @@ impl LightProtocol {
 
 			// update capabilities.
 			peer_info.capabilities.update_from(&announcement);
+		}
 
 		for handler in &self.handlers {
-			handler.on_announcement(*peer, &announcement);
+			handler.on_announcement(&Ctx {
+				peer: *peer,
+				io: io,
+				proto: self,
+			}, &announcement);
 		}
 
 		Ok(())
 	}
 
 	// Handle a request for block headers.
-	fn get_block_headers(&self, peer: &PeerId, io: &NetworkContext, data: UntrustedRlp) -> Result<(), Error> {
+	fn get_block_headers(&self, peer: &PeerId, io: &IoContext, data: UntrustedRlp) -> Result<(), Error> {
 		const MAX_HEADERS: usize = 512;
 
 		let peers = self.peers.read();
@@ -467,16 +675,29 @@ impl LightProtocol {
 			}
 
 			stream.out()
-		}).map_err(Into::into)
+		});
+
+		Ok(())
 	}
 
 	// Receive a response for block headers.
-	fn block_headers(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+	fn block_headers(&self, peer: &PeerId, io: &IoContext, raw: UntrustedRlp) -> Result<(), Error> {
+		let req_id = try!(self.pre_verify_response(peer, request::Kind::Headers, &raw));
+		let raw_headers: Vec<_> = raw.iter().skip(2).map(|x| x.as_raw().to_owned()).collect();
+
+		for handler in &self.handlers {
+			handler.on_block_headers(&Ctx {
+				peer: *peer,
+				io: io,
+				proto: self,
+			}, req_id, &raw_headers);
+		}
+
+		Ok(())
 	}
 
 	// Handle a request for block bodies.
-	fn get_block_bodies(&self, peer: &PeerId, io: &NetworkContext, data: UntrustedRlp) -> Result<(), Error> {
+	fn get_block_bodies(&self, peer: &PeerId, io: &IoContext, data: UntrustedRlp) -> Result<(), Error> {
 		const MAX_BODIES: usize = 256;
 
 		let peers = self.peers.read();
@@ -513,16 +734,29 @@ impl LightProtocol {
 			}
 
 			stream.out()
-		}).map_err(Into::into)
+		});
+
+		Ok(())
 	}
 
 	// Receive a response for block bodies.
-	fn block_bodies(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+	fn block_bodies(&self, peer: &PeerId, io: &IoContext, raw: UntrustedRlp) -> Result<(), Error> {
+		let req_id = try!(self.pre_verify_response(peer, request::Kind::Bodies, &raw));
+		let raw_bodies: Vec<Bytes> = raw.iter().skip(2).map(|x| x.as_raw().to_owned()).collect();
+
+		for handler in &self.handlers {
+			handler.on_block_bodies(&Ctx {
+				peer: *peer,
+				io: io,
+				proto: self,
+			}, req_id, &raw_bodies);
+		}
+
+		Ok(())
 	}
 
 	// Handle a request for receipts.
-	fn get_receipts(&self, peer: &PeerId, io: &NetworkContext, data: UntrustedRlp) -> Result<(), Error> {
+	fn get_receipts(&self, peer: &PeerId, io: &IoContext, data: UntrustedRlp) -> Result<(), Error> {
 		const MAX_RECEIPTS: usize = 256;
 
 		let peers = self.peers.read();
@@ -559,16 +793,33 @@ impl LightProtocol {
 			}
 
 			stream.out()
-		}).map_err(Into::into)
+		});
+
+		Ok(())
 	}
 
 	// Receive a response for receipts.
-	fn receipts(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+	fn receipts(&self, peer: &PeerId, io: &IoContext, raw: UntrustedRlp) -> Result<(), Error> {
+		let req_id = try!(self.pre_verify_response(peer, request::Kind::Receipts, &raw));
+		let raw_receipts: Vec<Vec<Receipt>> = try!(raw
+			.iter()
+			.skip(2)
+			.map(|x| x.as_val())
+			.collect());
+
+		for handler in &self.handlers {
+			handler.on_receipts(&Ctx {
+				peer: *peer,
+				io: io,
+				proto: self,
+			}, req_id, &raw_receipts);
+		}
+
+		Ok(())
 	}
 
 	// Handle a request for proofs.
-	fn get_proofs(&self, peer: &PeerId, io: &NetworkContext, data: UntrustedRlp) -> Result<(), Error> {
+	fn get_proofs(&self, peer: &PeerId, io: &IoContext, data: UntrustedRlp) -> Result<(), Error> {
 		const MAX_PROOFS: usize = 128;
 
 		let peers = self.peers.read();
@@ -616,16 +867,33 @@ impl LightProtocol {
 			}
 
 			stream.out()
-		}).map_err(Into::into)
+		});
+
+		Ok(())
 	}
 
 	// Receive a response for proofs.
-	fn proofs(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+	fn proofs(&self, peer: &PeerId, io: &IoContext, raw: UntrustedRlp) -> Result<(), Error> {
+		let req_id = try!(self.pre_verify_response(peer, request::Kind::StateProofs, &raw));
+
+		let raw_proofs: Vec<Vec<Bytes>> = raw.iter()
+			.skip(2)
+			.map(|x| x.iter().map(|node| node.as_raw().to_owned()).collect())
+			.collect();
+
+		for handler in &self.handlers { 
+			handler.on_state_proofs(&Ctx {
+				peer: *peer,
+				io: io,
+				proto: self,
+			}, req_id, &raw_proofs);
+		}
+
+		Ok(())
 	}
 
 	// Handle a request for contract code.
-	fn get_contract_code(&self, peer: &PeerId, io: &NetworkContext, data: UntrustedRlp) -> Result<(), Error> {
+	fn get_contract_code(&self, peer: &PeerId, io: &IoContext, data: UntrustedRlp) -> Result<(), Error> {
 		const MAX_CODES: usize = 256;
 
 		let peers = self.peers.read();
@@ -667,20 +935,34 @@ impl LightProtocol {
 			stream.append(&req_id).append(&cur_buffer);
 
 			for code in response {
-				stream.append_raw(&code, 1);
+				stream.append(&code);
 			}
 
 			stream.out()
-		}).map_err(Into::into)
+		});
+
+		Ok(())
 	}
 
 	// Receive a response for contract code.
-	fn contract_code(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+	fn contract_code(&self, peer: &PeerId, io: &IoContext, raw: UntrustedRlp) -> Result<(), Error> {
+		let req_id = try!(self.pre_verify_response(peer, request::Kind::Codes, &raw));
+
+		let raw_code: Vec<Bytes> = try!(raw.iter().skip(2).map(|x| x.as_val()).collect());
+
+		for handler in &self.handlers { 
+			handler.on_code(&Ctx {
+				peer: *peer,
+				io: io,
+				proto: self,
+			}, req_id, &raw_code);
+		}
+
+		Ok(())
 	}
 
 	// Handle a request for header proofs
-	fn get_header_proofs(&self, peer: &PeerId, io: &NetworkContext, data: UntrustedRlp) -> Result<(), Error> {
+	fn get_header_proofs(&self, peer: &PeerId, io: &IoContext, data: UntrustedRlp) -> Result<(), Error> {
 		const MAX_PROOFS: usize = 256;
 
 		let peers = self.peers.read();
@@ -727,16 +1009,37 @@ impl LightProtocol {
 			}
 
 			stream.out()
-		}).map_err(Into::into)
+		});
+
+		Ok(())
 	}
 
 	// Receive a response for header proofs
-	fn header_proofs(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+	fn header_proofs(&self, peer: &PeerId, io: &IoContext, raw: UntrustedRlp) -> Result<(), Error> {
+		fn decode_res(raw: UntrustedRlp) -> Result<(Bytes, Vec<Bytes>), ::rlp::DecoderError> {
+			Ok((
+				try!(raw.val_at(0)),
+				try!(raw.at(1)).iter().map(|x| x.as_raw().to_owned()).collect(),
+			))
+		}
+		
+		
+		let req_id = try!(self.pre_verify_response(peer, request::Kind::HeaderProofs, &raw));
+		let raw_proofs: Vec<_> = try!(raw.iter().skip(2).map(decode_res).collect());
+
+		for handler in &self.handlers { 
+			handler.on_header_proofs(&Ctx {
+				peer: *peer,
+				io: io,
+				proto: self,
+			}, req_id, &raw_proofs);
+		}
+
+		Ok(())
 	}
 
 	// Receive a set of transactions to relay.
-	fn relay_transactions(&self, peer: &PeerId, data: UntrustedRlp) -> Result<(), Error> {
+	fn relay_transactions(&self, peer: &PeerId, io: &IoContext, data: UntrustedRlp) -> Result<(), Error> {
 		const MAX_TRANSACTIONS: usize = 256;
 
 		let txs: Vec<_> = try!(data.iter().take(MAX_TRANSACTIONS).map(|x| x.as_val::<SignedTransaction>()).collect());
@@ -744,7 +1047,11 @@ impl LightProtocol {
 		debug!(target: "les", "Received {} transactions to relay from peer {}", txs.len(), peer);
 
 		for handler in &self.handlers {
-			handler.on_transactions(*peer, &txs);
+			handler.on_transactions(&Ctx {
+				peer: *peer,
+				io: io,
+				proto: self,	
+			}, &txs);
 		}
 
 		Ok(())
@@ -757,60 +1064,15 @@ impl NetworkProtocolHandler for LightProtocol {
 	}
 
 	fn read(&self, io: &NetworkContext, peer: &PeerId, packet_id: u8, data: &[u8]) {
-		let rlp = UntrustedRlp::new(data);
-
-		// handle the packet
-		let res = match packet_id {
-			packet::STATUS => self.status(peer, rlp),
-			packet::ANNOUNCE => self.announcement(peer, rlp),
-
-			packet::GET_BLOCK_HEADERS => self.get_block_headers(peer, io, rlp),
-			packet::BLOCK_HEADERS => self.block_headers(peer, io, rlp),
-
-			packet::GET_BLOCK_BODIES => self.get_block_bodies(peer, io, rlp),
-			packet::BLOCK_BODIES => self.block_bodies(peer, io, rlp),
-
-			packet::GET_RECEIPTS => self.get_receipts(peer, io, rlp),
-			packet::RECEIPTS => self.receipts(peer, io, rlp),
-
-			packet::GET_PROOFS => self.get_proofs(peer, io, rlp),
-			packet::PROOFS => self.proofs(peer, io, rlp),
-
-			packet::GET_CONTRACT_CODES => self.get_contract_code(peer, io, rlp),
-			packet::CONTRACT_CODES => self.contract_code(peer, io, rlp),
-
-			packet::GET_HEADER_PROOFS => self.get_header_proofs(peer, io, rlp),
-			packet::HEADER_PROOFS => self.header_proofs(peer, io, rlp),
-
-			packet::SEND_TRANSACTIONS => self.relay_transactions(peer, rlp),
-
-			other => {
-				Err(Error::UnrecognizedPacket(other))
-			}
-		};
-
-		// if something went wrong, figure out how much to punish the peer.
-		if let Err(e) = res {
-			match e.punishment() {
-				Punishment::None => {}
-				Punishment::Disconnect => {
-					debug!(target: "les", "Disconnecting peer {}: {}", peer, e);
-					io.disconnect_peer(*peer)
-				}
-				Punishment::Disable => {
-					debug!(target: "les", "Disabling peer {}: {}", peer, e);
-					io.disable_peer(*peer)
-				}
-			}
-		}
+		self.handle_packet(io, peer, packet_id, data);
 	}
 
 	fn connected(&self, io: &NetworkContext, peer: &PeerId) {
 		self.on_connect(peer, io);
 	}
 
-	fn disconnected(&self, _io: &NetworkContext, peer: &PeerId) {
-		self.on_disconnect(*peer);
+	fn disconnected(&self, io: &NetworkContext, peer: &PeerId) {
+		self.on_disconnect(*peer, io);
 	}
 
 	fn timeout(&self, _io: &NetworkContext, timer: TimerToken) {

ethcore/light/src/net/status.rs

@@ -82,26 +82,6 @@ impl Key {
 	}
 }
 
-/// Network ID structure.
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-#[repr(u32)]
-pub enum NetworkId {
-	/// ID for the mainnet
-	Mainnet = 1,
-	/// ID for the testnet
-	Testnet = 0,
-}
-
-impl NetworkId {
-	fn from_raw(raw: u32) -> Option<Self> {
-		match raw {
-			0 => Some(NetworkId::Testnet),
-			1 => Some(NetworkId::Mainnet),
-			_ => None,
-		}
-	}
-}
-
 // helper for decoding key-value pairs in the handshake or an announcement.
 struct Parser<'a> {
 	pos: usize,
@@ -118,6 +98,7 @@ impl<'a> Parser<'a> {
 	// expect a specific next key, and get the value's RLP.
 	// if the key isn't found, the position isn't advanced.
 	fn expect_raw(&mut self, key: Key) -> Result<UntrustedRlp<'a>, DecoderError> {
+		trace!(target: "les", "Expecting key {}", key.as_str());
 		let pre_pos = self.pos;
 		if let Some((k, val)) = try!(self.get_next()) {
 			if k == key { return Ok(val) }
@@ -164,7 +145,7 @@ pub struct Status {
 	/// Protocol version.
 	pub protocol_version: u32,
 	/// Network id of this peer.
-	pub network_id: NetworkId,
+	pub network_id: u64,
 	/// Total difficulty of the head of the chain.
 	pub head_td: U256,
 	/// Hash of the best block.
@@ -217,7 +198,7 @@ impl Capabilities {
 ///   - chain status
 ///   - serving capabilities
 ///   - buffer flow parameters
-pub fn parse_handshake(rlp: UntrustedRlp) -> Result<(Status, Capabilities, FlowParams), DecoderError> {
+pub fn parse_handshake(rlp: UntrustedRlp) -> Result<(Status, Capabilities, Option<FlowParams>), DecoderError> {
 	let mut parser = Parser {
 		pos: 0,
 		rlp: rlp,
@@ -225,8 +206,7 @@ pub fn parse_handshake(rlp: UntrustedRlp) -> Result<(Status, Capabilities, FlowP
 
 	let status = Status {
 		protocol_version: try!(parser.expect(Key::ProtocolVersion)),
-		network_id: try!(parser.expect(Key::NetworkId)
-			.and_then(|id: u32| NetworkId::from_raw(id).ok_or(DecoderError::Custom("Invalid network ID")))),
+		network_id: try!(parser.expect(Key::NetworkId)),
 		head_td: try!(parser.expect(Key::HeadTD)),
 		head_hash: try!(parser.expect(Key::HeadHash)),
 		head_num: try!(parser.expect(Key::HeadNum)),
@@ -241,20 +221,23 @@ pub fn parse_handshake(rlp: UntrustedRlp) -> Result<(Status, Capabilities, FlowP
 		tx_relay: parser.expect_raw(Key::TxRelay).is_ok(),
 	};
 
-	let flow_params = FlowParams::new(
-		try!(parser.expect(Key::BufferLimit)),
-		try!(parser.expect(Key::BufferCostTable)),
-		try!(parser.expect(Key::BufferRechargeRate)),
-	);
+	let flow_params = match (
+		parser.expect(Key::BufferLimit),
+		parser.expect(Key::BufferCostTable),
+		parser.expect(Key::BufferRechargeRate)
+	) {
+		(Ok(bl), Ok(bct), Ok(brr)) => Some(FlowParams::new(bl, bct, brr)),
+		_ => None,
+	};
 
 	Ok((status, capabilities, flow_params))
 }
 
 /// Write a handshake, given status, capabilities, and flow parameters.
-pub fn write_handshake(status: &Status, capabilities: &Capabilities, flow_params: &FlowParams) -> Vec<u8> {
+pub fn write_handshake(status: &Status, capabilities: &Capabilities, flow_params: Option<&FlowParams>) -> Vec<u8> {
 	let mut pairs = Vec::new();
 	pairs.push(encode_pair(Key::ProtocolVersion, &status.protocol_version));
-	pairs.push(encode_pair(Key::NetworkId, &(status.network_id as u32)));
+	pairs.push(encode_pair(Key::NetworkId, &(status.network_id as u64)));
 	pairs.push(encode_pair(Key::HeadTD, &status.head_td));
 	pairs.push(encode_pair(Key::HeadHash, &status.head_hash));
 	pairs.push(encode_pair(Key::HeadNum, &status.head_num));
@@ -273,9 +256,11 @@ pub fn write_handshake(status: &Status, capabilities: &Capabilities, flow_params
 		pairs.push(encode_flag(Key::TxRelay));
 	}
 
+	if let Some(flow_params) = flow_params {
 		pairs.push(encode_pair(Key::BufferLimit, flow_params.limit()));
 		pairs.push(encode_pair(Key::BufferCostTable, flow_params.cost_table()));
 		pairs.push(encode_pair(Key::BufferRechargeRate, flow_params.recharge_rate()));
+	}
 
 	let mut stream = RlpStream::new_list(pairs.len());
 
@@ -385,7 +370,7 @@ mod tests {
 	fn full_handshake() {
 		let status = Status {
 			protocol_version: 1,
-			network_id: NetworkId::Mainnet,
+			network_id: 1,
 			head_td: U256::default(),
 			head_hash: H256::default(),
 			head_num: 10,
@@ -406,21 +391,21 @@ mod tests {
 			1000.into(),
 		);
 
-		let handshake = write_handshake(&status, &capabilities, &flow_params);
+		let handshake = write_handshake(&status, &capabilities, Some(&flow_params));
 
 		let (read_status, read_capabilities, read_flow)
 			= parse_handshake(UntrustedRlp::new(&handshake)).unwrap();
 
 		assert_eq!(read_status, status);
 		assert_eq!(read_capabilities, capabilities);
-		assert_eq!(read_flow, flow_params);
+		assert_eq!(read_flow.unwrap(), flow_params);
 	}
 
 	#[test]
 	fn partial_handshake() {
 		let status = Status {
 			protocol_version: 1,
-			network_id: NetworkId::Mainnet,
+			network_id: 1,
 			head_td: U256::default(),
 			head_hash: H256::default(),
 			head_num: 10,
@@ -441,21 +426,21 @@ mod tests {
 			1000.into(),
 		);
 
-		let handshake = write_handshake(&status, &capabilities, &flow_params);
+		let handshake = write_handshake(&status, &capabilities, Some(&flow_params));
 
 		let (read_status, read_capabilities, read_flow)
 			= parse_handshake(UntrustedRlp::new(&handshake)).unwrap();
 
 		assert_eq!(read_status, status);
 		assert_eq!(read_capabilities, capabilities);
-		assert_eq!(read_flow, flow_params);
+		assert_eq!(read_flow.unwrap(), flow_params);
 	}
 
 	#[test]
 	fn skip_unknown_keys() {
 		let status = Status {
 			protocol_version: 1,
-			network_id: NetworkId::Mainnet,
+			network_id: 1,
 			head_td: U256::default(),
 			head_hash: H256::default(),
 			head_num: 10,
@@ -476,7 +461,7 @@ mod tests {
 			1000.into(),
 		);
 
-		let handshake = write_handshake(&status, &capabilities, &flow_params);
+		let handshake = write_handshake(&status, &capabilities, Some(&flow_params));
 		let interleaved = {
 			let handshake = UntrustedRlp::new(&handshake);
 			let mut stream = RlpStream::new_list(handshake.item_count() * 3);
@@ -498,7 +483,7 @@ mod tests {
 
 		assert_eq!(read_status, status);
 		assert_eq!(read_capabilities, capabilities);
-		assert_eq!(read_flow, flow_params);
+		assert_eq!(read_flow.unwrap(), flow_params);
 	}
 
 	#[test]
@@ -548,4 +533,33 @@ mod tests {
 		let out = stream.drain();
 		assert!(parse_announcement(UntrustedRlp::new(&out)).is_ok());
 	}
+
+	#[test]
+	fn optional_flow() {
+		let status = Status {
+			protocol_version: 1,
+			network_id: 1,
+			head_td: U256::default(),
+			head_hash: H256::default(),
+			head_num: 10,
+			genesis_hash: H256::zero(),
+			last_head: None,
+		};
+
+		let capabilities = Capabilities {
+			serve_headers: true,
+			serve_chain_since: Some(5),
+			serve_state_since: Some(8),
+			tx_relay: true,
+		};
+
+		let handshake = write_handshake(&status, &capabilities, None);
+
+		let (read_status, read_capabilities, read_flow)
+			= parse_handshake(UntrustedRlp::new(&handshake)).unwrap();
+
+		assert_eq!(read_status, status);
+		assert_eq!(read_capabilities, capabilities);
+		assert!(read_flow.is_none());
+	}
 }

ethcore/light/src/net/tests/mod.rs

@@ -0,0 +1,512 @@
+// 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/>.
+
+//! Tests for the `LightProtocol` implementation.
+//! These don't test of the higher level logic on top of 
+
+use ethcore::blockchain_info::BlockChainInfo;
+use ethcore::client::{BlockChainClient, EachBlockWith, TestBlockChainClient};
+use ethcore::ids::BlockId;
+use ethcore::transaction::SignedTransaction;
+use network::PeerId;
+
+use net::buffer_flow::FlowParams;
+use net::context::IoContext;
+use net::status::{Capabilities, Status, write_handshake};
+use net::{encode_request, LightProtocol, Params, packet};
+use provider::Provider;
+use request::{self, Request, Headers};
+
+use rlp::*;
+use util::{Bytes, H256, U256};
+
+use std::sync::Arc;
+
+// expected result from a call.
+#[derive(Debug, PartialEq, Eq)]
+enum Expect {
+	/// Expect to have message sent to peer.
+	Send(PeerId, u8, Vec<u8>),
+	/// Expect this response.
+	Respond(u8, Vec<u8>),
+	/// Expect a punishment (disconnect/disable)
+	Punish(PeerId),
+	/// Expect nothing.
+	Nothing,
+}
+
+impl IoContext for Expect {
+	fn send(&self, peer: PeerId, packet_id: u8, packet_body: Vec<u8>) {
+		assert_eq!(self, &Expect::Send(peer, packet_id, packet_body));
+	}
+
+	fn respond(&self, packet_id: u8, packet_body: Vec<u8>) {
+		assert_eq!(self, &Expect::Respond(packet_id, packet_body));
+	}
+
+	fn disconnect_peer(&self, peer: PeerId) {
+		assert_eq!(self, &Expect::Punish(peer));
+	}
+
+	fn disable_peer(&self, peer: PeerId) {
+		assert_eq!(self, &Expect::Punish(peer));
+	}
+
+	fn protocol_version(&self, _peer: PeerId) -> Option<u8> {
+		Some(super::MAX_PROTOCOL_VERSION)
+	}
+}
+
+// can't implement directly for Arc due to cross-crate orphan rules.
+struct TestProvider(Arc<TestProviderInner>);
+
+struct TestProviderInner {
+	client: TestBlockChainClient,
+}
+
+impl Provider for TestProvider {
+	fn chain_info(&self) -> BlockChainInfo {
+		self.0.client.chain_info()
+	}
+
+	fn reorg_depth(&self, a: &H256, b: &H256) -> Option<u64> {
+		self.0.client.tree_route(a, b).map(|route| route.index as u64)
+	}
+
+	fn earliest_state(&self) -> Option<u64> {
+		None
+	}
+
+	fn block_headers(&self, req: request::Headers) -> Vec<Bytes> {
+		let best_num = self.0.client.chain_info().best_block_number;
+		let start_num = req.block_num;
+
+		match self.0.client.block_hash(BlockId::Number(req.block_num)) {
+			Some(hash) if hash == req.block_hash => {}
+			_=> {
+				trace!(target: "les_provider", "unknown/non-canonical start block in header request: {:?}", (req.block_num, req.block_hash));
+				return vec![]
+			}
+		}
+
+		(0u64..req.max as u64)
+			.map(|x: u64| x.saturating_mul(req.skip + 1))
+			.take_while(|x| if req.reverse { x < &start_num } else { best_num - start_num >= *x })
+			.map(|x| if req.reverse { start_num - x } else { start_num + x })
+			.map(|x| self.0.client.block_header(BlockId::Number(x))) 
+			.take_while(|x| x.is_some())
+			.flat_map(|x| x)
+			.collect()
+	}
+
+	fn block_bodies(&self, req: request::Bodies) -> Vec<Bytes> {
+		req.block_hashes.into_iter()
+			.map(|hash| self.0.client.block_body(BlockId::Hash(hash)))
+			.map(|body| body.unwrap_or_else(|| ::rlp::EMPTY_LIST_RLP.to_vec()))
+			.collect()
+	}
+
+	fn receipts(&self, req: request::Receipts) -> Vec<Bytes> {
+		req.block_hashes.into_iter()
+			.map(|hash| self.0.client.block_receipts(&hash))
+			.map(|receipts| receipts.unwrap_or_else(|| ::rlp::EMPTY_LIST_RLP.to_vec()))
+			.collect()
+	}
+
+	fn proofs(&self, req: request::StateProofs) -> Vec<Bytes> {
+		req.requests.into_iter()
+			.map(|req| {
+				match req.key2 {
+					Some(_) => ::util::sha3::SHA3_NULL_RLP.to_vec(),
+					None => {
+						// sort of a leaf node
+						let mut stream = RlpStream::new_list(2);
+						stream.append(&req.key1).append_empty_data();
+						stream.out()
+					}
+				}
+			})
+			.collect()		
+	}
+
+	fn contract_code(&self, req: request::ContractCodes) -> Vec<Bytes> {
+		req.code_requests.into_iter()
+			.map(|req| { 
+                req.account_key.iter().chain(req.account_key.iter()).cloned().collect()
+			 })
+			.collect()
+	}
+
+	fn header_proofs(&self, req: request::HeaderProofs) -> Vec<Bytes> {
+		req.requests.into_iter().map(|_| ::rlp::EMPTY_LIST_RLP.to_vec()).collect()
+	}
+
+	fn pending_transactions(&self) -> Vec<SignedTransaction> {
+		self.0.client.pending_transactions()
+	}
+}
+
+fn make_flow_params() -> FlowParams {
+	FlowParams::new(5_000_000.into(), Default::default(), 100_000.into())
+}
+
+fn capabilities() -> Capabilities {
+	Capabilities {
+		serve_headers: true,
+		serve_chain_since: Some(1),
+		serve_state_since: Some(1),
+		tx_relay: true,
+	}
+}
+
+// helper for setting up the protocol handler and provider.
+fn setup(flow_params: FlowParams, capabilities: Capabilities) -> (Arc<TestProviderInner>, LightProtocol) {
+	let provider = Arc::new(TestProviderInner {
+		client: TestBlockChainClient::new(),
+	});
+
+	let proto = LightProtocol::new(Arc::new(TestProvider(provider.clone())), Params {
+		network_id: 2,
+		flow_params: flow_params,
+		capabilities: capabilities,
+	});
+
+	(provider, proto)
+}
+
+fn status(chain_info: BlockChainInfo) -> Status {
+	Status {
+		protocol_version: 1,
+		network_id: 2,
+		head_td: chain_info.total_difficulty,
+		head_hash: chain_info.best_block_hash,
+		head_num: chain_info.best_block_number,
+		genesis_hash: chain_info.genesis_hash,
+		last_head: None,
+	}
+}
+
+#[test]
+fn handshake_expected() {
+	let flow_params = make_flow_params();
+	let capabilities = capabilities();	
+
+	let (provider, proto) = setup(flow_params.clone(), capabilities.clone());	
+
+	let status = status(provider.client.chain_info());
+
+	let packet_body = write_handshake(&status, &capabilities, Some(&flow_params));
+
+	proto.on_connect(&1, &Expect::Send(1, packet::STATUS, packet_body));
+}
+
+#[test]
+#[should_panic]
+fn genesis_mismatch() {
+	let flow_params = make_flow_params();
+	let capabilities = capabilities();	
+
+	let (provider, proto) = setup(flow_params.clone(), capabilities.clone());	
+
+	let mut status = status(provider.client.chain_info());
+	status.genesis_hash = H256::default();
+
+	let packet_body = write_handshake(&status, &capabilities, Some(&flow_params));
+
+	proto.on_connect(&1, &Expect::Send(1, packet::STATUS, packet_body));
+}
+
+#[test]
+fn buffer_overflow() {
+	let flow_params = make_flow_params();
+	let capabilities = capabilities();	
+
+	let (provider, proto) = setup(flow_params.clone(), capabilities.clone());	
+
+	let status = status(provider.client.chain_info());
+
+	{
+		let packet_body = write_handshake(&status, &capabilities, Some(&flow_params));	
+		proto.on_connect(&1, &Expect::Send(1, packet::STATUS, packet_body));	
+	}
+
+	{
+		let my_status = write_handshake(&status, &capabilities, Some(&flow_params));
+		proto.handle_packet(&Expect::Nothing, &1, packet::STATUS, &my_status);
+	}
+
+	// 1000 requests is far too many for the default flow params.
+	let request = encode_request(&Request::Headers(Headers {
+		block_num: 1,
+		block_hash: provider.client.chain_info().genesis_hash,
+		max: 1000,
+		skip: 0,
+		reverse: false,
+	}), 111);
+
+	proto.handle_packet(&Expect::Punish(1), &1, packet::GET_BLOCK_HEADERS, &request);
+}
+
+// test the basic request types -- these just make sure that requests are parsed
+// and sent to the provider correctly as well as testing response formatting.
+
+#[test]
+fn get_block_headers() {
+	let flow_params = FlowParams::new(5_000_000.into(), Default::default(), 0.into());
+	let capabilities = capabilities();	
+
+	let (provider, proto) = setup(flow_params.clone(), capabilities.clone());	
+
+	let cur_status = status(provider.client.chain_info());
+	let my_status = write_handshake(&cur_status, &capabilities, Some(&flow_params));
+
+	provider.client.add_blocks(100, EachBlockWith::Nothing);
+
+	let cur_status = status(provider.client.chain_info());
+
+	{
+		let packet_body = write_handshake(&cur_status, &capabilities, Some(&flow_params));	
+		proto.on_connect(&1, &Expect::Send(1, packet::STATUS, packet_body));	
+		proto.handle_packet(&Expect::Nothing, &1, packet::STATUS, &my_status);
+	}
+
+	let request = Headers {
+		block_num: 1,
+		block_hash: provider.client.block_hash(BlockId::Number(1)).unwrap(),
+		max: 10,
+		skip: 0,
+		reverse: false,
+	};
+	let req_id = 111;
+
+	let request_body = encode_request(&Request::Headers(request.clone()), req_id);
+	let response = {
+		let headers: Vec<_> = (0..10).map(|i| provider.client.block_header(BlockId::Number(i + 1)).unwrap()).collect();
+		assert_eq!(headers.len(), 10);
+
+		let new_buf = *flow_params.limit() - flow_params.compute_cost(request::Kind::Headers, 10);
+
+		let mut response_stream = RlpStream::new_list(12);
+		
+		response_stream.append(&req_id).append(&new_buf);
+		for header in headers {
+			response_stream.append_raw(&header, 1);
+		}
+
+		response_stream.out()
+	};
+
+	let expected = Expect::Respond(packet::BLOCK_HEADERS, response);
+	proto.handle_packet(&expected, &1, packet::GET_BLOCK_HEADERS, &request_body);
+}
+
+#[test]
+fn get_block_bodies() {
+	let flow_params = FlowParams::new(5_000_000.into(), Default::default(), 0.into());
+	let capabilities = capabilities();	
+
+	let (provider, proto) = setup(flow_params.clone(), capabilities.clone());	
+
+	let cur_status = status(provider.client.chain_info());
+	let my_status = write_handshake(&cur_status, &capabilities, Some(&flow_params));
+
+	provider.client.add_blocks(100, EachBlockWith::Nothing);
+
+	let cur_status = status(provider.client.chain_info());
+
+	{
+		let packet_body = write_handshake(&cur_status, &capabilities, Some(&flow_params));	
+		proto.on_connect(&1, &Expect::Send(1, packet::STATUS, packet_body));	
+		proto.handle_packet(&Expect::Nothing, &1, packet::STATUS, &my_status);
+	}
+
+	let request = request::Bodies {
+		block_hashes: (0..10).map(|i| provider.client.block_hash(BlockId::Number(i)).unwrap()).collect(),
+	};
+
+	let req_id = 111;
+
+	let request_body = encode_request(&Request::Bodies(request.clone()), req_id);
+	let response = {
+		let bodies: Vec<_> = (0..10).map(|i| provider.client.block_body(BlockId::Number(i + 1)).unwrap()).collect();
+		assert_eq!(bodies.len(), 10);
+
+		let new_buf = *flow_params.limit() - flow_params.compute_cost(request::Kind::Bodies, 10);
+
+		let mut response_stream = RlpStream::new_list(12);
+		
+		response_stream.append(&req_id).append(&new_buf);
+		for body in bodies {
+			response_stream.append_raw(&body, 1);
+		}
+
+		response_stream.out()
+	};
+
+	let expected = Expect::Respond(packet::BLOCK_BODIES, response);
+	proto.handle_packet(&expected, &1, packet::GET_BLOCK_BODIES, &request_body);
+}
+
+#[test]
+fn get_block_receipts() {
+	let flow_params = FlowParams::new(5_000_000.into(), Default::default(), 0.into());
+	let capabilities = capabilities();	
+
+	let (provider, proto) = setup(flow_params.clone(), capabilities.clone());	
+
+	let cur_status = status(provider.client.chain_info());
+	let my_status = write_handshake(&cur_status, &capabilities, Some(&flow_params));
+
+	provider.client.add_blocks(1000, EachBlockWith::Nothing);
+
+	let cur_status = status(provider.client.chain_info());
+
+	{
+		let packet_body = write_handshake(&cur_status, &capabilities, Some(&flow_params));	
+		proto.on_connect(&1, &Expect::Send(1, packet::STATUS, packet_body));	
+		proto.handle_packet(&Expect::Nothing, &1, packet::STATUS, &my_status);
+	}
+
+	// find the first 10 block hashes starting with `f` because receipts are only provided
+	// by the test client in that case.
+	let block_hashes: Vec<_> = (0..1000).map(|i| provider.client.block_hash(BlockId::Number(i)).unwrap())
+		.filter(|hash| format!("{}", hash).starts_with("f")).take(10).collect();
+
+	let request = request::Receipts {
+		block_hashes: block_hashes.clone(),
+	};
+
+	let req_id = 111;
+
+	let request_body = encode_request(&Request::Receipts(request.clone()), req_id);
+	let response = {
+		let receipts: Vec<_> = block_hashes.iter()
+			.map(|hash| provider.client.block_receipts(hash).unwrap())
+			.collect();
+
+		let new_buf = *flow_params.limit() - flow_params.compute_cost(request::Kind::Receipts, receipts.len());
+
+		let mut response_stream = RlpStream::new_list(2 + receipts.len());
+		
+		response_stream.append(&req_id).append(&new_buf);
+		for block_receipts in receipts {
+			response_stream.append_raw(&block_receipts, 1);
+		}
+
+		response_stream.out()
+	};
+
+	let expected = Expect::Respond(packet::RECEIPTS, response);
+	proto.handle_packet(&expected, &1, packet::GET_RECEIPTS, &request_body);
+}
+
+#[test]
+fn get_state_proofs() {
+	let flow_params = FlowParams::new(5_000_000.into(), Default::default(), 0.into());
+	let capabilities = capabilities();	
+
+	let (provider, proto) = setup(flow_params.clone(), capabilities.clone());	
+
+	let cur_status = status(provider.client.chain_info());
+
+	{
+		let packet_body = write_handshake(&cur_status, &capabilities, Some(&flow_params));	
+		proto.on_connect(&1, &Expect::Send(1, packet::STATUS, packet_body.clone()));	
+		proto.handle_packet(&Expect::Nothing, &1, packet::STATUS, &packet_body);
+	}
+
+	let req_id = 112;
+	let key1 = U256::from(11223344).into();
+	let key2 = U256::from(99988887).into();
+
+	let request = Request::StateProofs (request::StateProofs { 
+		requests: vec![
+			request::StateProof { block: H256::default(), key1: key1, key2: None, from_level: 0 },
+			request::StateProof { block: H256::default(), key1: key1, key2: Some(key2), from_level: 0},
+		]
+	});
+
+	let request_body = encode_request(&request, req_id);
+	let response = {
+		let proofs = vec![
+			{ let mut stream = RlpStream::new_list(2); stream.append(&key1).append_empty_data(); stream.out() },
+			::util::sha3::SHA3_NULL_RLP.to_vec(),
+		];
+
+		let new_buf = *flow_params.limit() - flow_params.compute_cost(request::Kind::StateProofs, 2);
+
+		let mut response_stream = RlpStream::new_list(4);
+		
+		response_stream.append(&req_id).append(&new_buf);
+		for proof in proofs {
+			response_stream.append_raw(&proof, 1);
+		}
+
+		response_stream.out()
+	};
+
+	let expected = Expect::Respond(packet::PROOFS, response);
+	proto.handle_packet(&expected, &1, packet::GET_PROOFS, &request_body);
+}
+
+#[test]
+fn get_contract_code() {
+	let flow_params = FlowParams::new(5_000_000.into(), Default::default(), 0.into());
+	let capabilities = capabilities();	
+
+	let (provider, proto) = setup(flow_params.clone(), capabilities.clone());	
+
+	let cur_status = status(provider.client.chain_info());
+
+	{
+		let packet_body = write_handshake(&cur_status, &capabilities, Some(&flow_params));	
+		proto.on_connect(&1, &Expect::Send(1, packet::STATUS, packet_body.clone()));	
+		proto.handle_packet(&Expect::Nothing, &1, packet::STATUS, &packet_body);
+	}
+
+	let req_id = 112;
+	let key1 = U256::from(11223344).into();
+	let key2 = U256::from(99988887).into();
+
+	let request = Request::Codes (request::ContractCodes { 
+		code_requests: vec![
+			request::ContractCode { block_hash: H256::default(), account_key: key1 },
+			request::ContractCode { block_hash: H256::default(), account_key: key2 },
+		],
+	});
+
+	let request_body = encode_request(&request, req_id);
+	let response = {
+		let codes: Vec<Vec<_>> = vec![
+			key1.iter().chain(key1.iter()).cloned().collect(),
+            key2.iter().chain(key2.iter()).cloned().collect(),
+		];
+
+		let new_buf = *flow_params.limit() - flow_params.compute_cost(request::Kind::Codes, 2);
+
+		let mut response_stream = RlpStream::new_list(4);
+		
+		response_stream.append(&req_id).append(&new_buf);
+		for code in codes {
+			response_stream.append(&code);
+		}
+
+		response_stream.out()
+	};
+
+	let expected = Expect::Respond(packet::CONTRACT_CODES, response);
+	proto.handle_packet(&expected, &1, packet::GET_CONTRACT_CODES, &request_body);
+}

ethcore/light/src/provider.rs

@@ -20,7 +20,7 @@
 use ethcore::blockchain_info::BlockChainInfo;
 use ethcore::client::{BlockChainClient, ProvingBlockChainClient};
 use ethcore::transaction::SignedTransaction;
-use ethcore::ids::BlockID;
+use ethcore::ids::BlockId;
 
 use util::{Bytes, H256};
 
@@ -33,6 +33,7 @@ use request;
 /// or empty vector where appropriate.
 ///
 /// [1]: https://github.com/ethcore/parity/wiki/Light-Ethereum-Subprotocol-(LES)
+#[cfg_attr(feature = "ipc", ipc(client_ident="LightProviderClient"))]
 pub trait Provider: Send + Sync {
 	/// Provide current blockchain info.
 	fn chain_info(&self) -> BlockChainInfo;
@@ -71,7 +72,10 @@ pub trait Provider: Send + Sync {
 	/// Each item in the resulting vector is either the raw bytecode or empty.
 	fn contract_code(&self, req: request::ContractCodes) -> Vec<Bytes>;
 
-	/// Provide header proofs from the Canonical Hash Tries.
+	/// Provide header proofs from the Canonical Hash Tries as well as the headers 
+	/// they correspond to -- each element in the returned vector is a 2-tuple.
+	/// The first element is a block header and the second a merkle proof of 
+	/// the header in a requested CHT.
 	fn header_proofs(&self, req: request::HeaderProofs) -> Vec<Bytes>;
 
 	/// Provide pending transactions.
@@ -96,7 +100,7 @@ impl<T: ProvingBlockChainClient + ?Sized> Provider for T {
 		let best_num = self.chain_info().best_block_number;
 		let start_num = req.block_num;
 
-		match self.block_hash(BlockID::Number(req.block_num)) {
+		match self.block_hash(BlockId::Number(req.block_num)) {
 			Some(hash) if hash == req.block_hash => {}
 			_=> {
 				trace!(target: "les_provider", "unknown/non-canonical start block in header request: {:?}", (req.block_num, req.block_hash));
@@ -105,10 +109,10 @@ impl<T: ProvingBlockChainClient + ?Sized> Provider for T {
 		}
 
 		(0u64..req.max as u64)
-			.map(|x: u64| x.saturating_mul(req.skip))
-			.take_while(|x| if req.reverse { x < &start_num } else { best_num - start_num < *x })
+			.map(|x: u64| x.saturating_mul(req.skip + 1))
+			.take_while(|x| if req.reverse { x < &start_num } else { best_num - start_num >= *x })
 			.map(|x| if req.reverse { start_num - x } else { start_num + x })
-			.map(|x| self.block_header(BlockID::Number(x)))
+			.map(|x| self.block_header(BlockId::Number(x)))
 			.take_while(|x| x.is_some())
 			.flat_map(|x| x)
 			.collect()
@@ -116,7 +120,7 @@ impl<T: ProvingBlockChainClient + ?Sized> Provider for T {
 
 	fn block_bodies(&self, req: request::Bodies) -> Vec<Bytes> {
 		req.block_hashes.into_iter()
-			.map(|hash| self.block_body(BlockID::Hash(hash)))
+			.map(|hash| self.block_body(BlockId::Hash(hash)))
 			.map(|body| body.unwrap_or_else(|| ::rlp::EMPTY_LIST_RLP.to_vec()))
 			.collect()
 	}
@@ -135,8 +139,8 @@ impl<T: ProvingBlockChainClient + ?Sized> Provider for T {
 
 		for request in req.requests {
 			let proof = match request.key2 {
-				Some(key2) => self.prove_storage(request.key1, key2, request.from_level, BlockID::Hash(request.block)),
-				None => self.prove_account(request.key1, request.from_level, BlockID::Hash(request.block)),
+				Some(key2) => self.prove_storage(request.key1, key2, request.from_level, BlockId::Hash(request.block)),
+				None => self.prove_account(request.key1, request.from_level, BlockId::Hash(request.block)),
 			};
 
 			let mut stream = RlpStream::new_list(proof.len());
@@ -153,7 +157,7 @@ impl<T: ProvingBlockChainClient + ?Sized> Provider for T {
 	fn contract_code(&self, req: request::ContractCodes) -> Vec<Bytes> {
 		req.code_requests.into_iter()
 			.map(|req| {
-				self.code_by_hash(req.account_key, BlockID::Hash(req.block_hash))
+				self.code_by_hash(req.account_key, BlockId::Hash(req.block_hash))
 			})
 			.collect()
 	}

ethcore/light/src/types/les_request.rs

@@ -19,7 +19,8 @@
 use util::H256;
 
 /// A request for block headers.
-#[derive(Debug, Clone, PartialEq, Eq, Binary)]
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub struct Headers {
 	/// Starting block number
 	pub block_num: u64,
@@ -35,7 +36,8 @@ pub struct Headers {
 }
 
 /// A request for specific block bodies.
-#[derive(Debug, Clone, PartialEq, Eq, Binary)]
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub struct Bodies {
 	/// Hashes which bodies are being requested for.
 	pub block_hashes: Vec<H256>
@@ -45,14 +47,16 @@ pub struct Bodies {
 ///
 /// This request is answered with a list of transaction receipts for each block
 /// requested.
-#[derive(Debug, Clone, PartialEq, Eq, Binary)]
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub struct Receipts {
 	/// Block hashes to return receipts for.
 	pub block_hashes: Vec<H256>,
 }
 
 /// A request for a state proof
-#[derive(Debug, Clone, PartialEq, Eq, Binary)]
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub struct StateProof {
 	/// Block hash to query state from.
 	pub block: H256,
@@ -66,14 +70,16 @@ pub struct StateProof {
 }
 
 /// A request for state proofs.
-#[derive(Debug, Clone, PartialEq, Eq, Binary)]
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub struct StateProofs {
 	/// All the proof requests.
 	pub requests: Vec<StateProof>,
 }
 
 /// A request for contract code.
-#[derive(Debug, Clone, PartialEq, Eq, Binary)]
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub struct ContractCode {
 	/// Block hash
 	pub block_hash: H256,
@@ -82,14 +88,16 @@ pub struct ContractCode {
 }
 
 /// A request for contract code.
-#[derive(Debug, Clone, PartialEq, Eq, Binary)]
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub struct ContractCodes {
 	/// Block hash and account key (== sha3(address)) pairs to fetch code for.
 	pub code_requests: Vec<ContractCode>,
 }
 
 /// A request for a header proof from the Canonical Hash Trie.
-#[derive(Debug, Clone, PartialEq, Eq, Binary)]
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub struct HeaderProof {
 	/// Number of the CHT.
 	pub cht_number: u64,
@@ -100,14 +108,16 @@ pub struct HeaderProof {
 }
 
 /// A request for header proofs from the CHT.
-#[derive(Debug, Clone, PartialEq, Eq, Binary)]
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub struct HeaderProofs {
 	/// All the proof requests.
 	pub requests: Vec<HeaderProof>,
 }
 
 /// Kinds of requests.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Binary)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub enum Kind {
 	/// Requesting headers.
 	Headers,
@@ -124,7 +134,8 @@ pub enum Kind {
 }
 
 /// Encompasses all possible types of requests in a single structure.
-#[derive(Debug, Clone, PartialEq, Eq, Binary)]
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub enum Request {
 	/// Requesting headers.
 	Headers(Headers),

ethcore/light/src/types/mod.rs

@@ -15,6 +15,11 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 //! Types used in the public (IPC) api which require custom code generation.
+#![cfg_attr(feature = "ipc", allow(dead_code, unused_assignments, unused_variables))] // codegen issues
 
-#![allow(dead_code, unused_assignments, unused_variables)] // codegen issues
+
+#[cfg(feature = "ipc")]
 include!(concat!(env!("OUT_DIR"), "/mod.rs.in"));
+
+#[cfg(not(feature = "ipc"))]
+include!("mod.rs.in");

ethcore/res/authority_round.json

@@ -4,7 +4,8 @@
 		"AuthorityRound": {
 			"params": {
 				"gasLimitBoundDivisor": "0x0400",
-				"stepDuration": "1",
+				"stepDuration": 1,
+				"startStep": 2,
 				"authorities" : [
 					"0x7d577a597b2742b498cb5cf0c26cdcd726d39e6e",
 					"0x82a978b3f5962a5b0957d9ee9eef472ee55b42f1"

ethcore/res/ethereum/tests

@@ -1 +1 @@
-Subproject commit e8f4624b7f1a15c63674eecf577c7ab76c3b16be
+Subproject commit d509c75936ec6cbba683ee1916aa0bca436bc376

ethcore/src/account_provider/mod.rs

@@ -202,7 +202,7 @@ impl AccountProvider {
 		Ok(AccountMeta {
 			name: try!(self.sstore.name(&account)),
 			meta: try!(self.sstore.meta(&account)),
-			uuid: self.sstore.uuid(&account).ok().map(Into::into),	// allowed to not have a UUID
+			uuid: self.sstore.uuid(&account).ok().map(Into::into),	// allowed to not have a Uuid
 		})
 	}
 

ethcore/src/blockchain/blockchain.rs

@@ -146,7 +146,7 @@ pub trait BlockProvider {
 }
 
 #[derive(Debug, Hash, Eq, PartialEq, Clone)]
-enum CacheID {
+enum CacheId {
 	BlockHeader(H256),
 	BlockBody(H256),
 	BlockDetails(H256),
@@ -160,7 +160,7 @@ impl bc::group::BloomGroupDatabase for BlockChain {
 	fn blooms_at(&self, position: &bc::group::GroupPosition) -> Option<bc::group::BloomGroup> {
 		let position = LogGroupPosition::from(position.clone());
 		let result = self.db.read_with_cache(db::COL_EXTRA, &self.blocks_blooms, &position).map(Into::into);
-		self.cache_man.lock().note_used(CacheID::BlocksBlooms(position));
+		self.cache_man.lock().note_used(CacheId::BlocksBlooms(position));
 		result
 	}
 }
@@ -193,7 +193,7 @@ pub struct BlockChain {
 
 	db: Arc<Database>,
 
-	cache_man: Mutex<CacheManager<CacheID>>,
+	cache_man: Mutex<CacheManager<CacheId>>,
 
 	pending_best_block: RwLock<Option<BestBlock>>,
 	pending_block_hashes: RwLock<HashMap<BlockNumber, H256>>,
@@ -270,7 +270,7 @@ impl BlockProvider for BlockChain {
 			None => None
 		};
 
-		self.cache_man.lock().note_used(CacheID::BlockHeader(hash.clone()));
+		self.cache_man.lock().note_used(CacheId::BlockHeader(hash.clone()));
 		result
 	}
 
@@ -306,7 +306,7 @@ impl BlockProvider for BlockChain {
 			None => None
 		};
 
-		self.cache_man.lock().note_used(CacheID::BlockBody(hash.clone()));
+		self.cache_man.lock().note_used(CacheId::BlockBody(hash.clone()));
 
 		result
 	}
@@ -314,28 +314,28 @@ impl BlockProvider for BlockChain {
 	/// Get the familial details concerning a block.
 	fn block_details(&self, hash: &H256) -> Option<BlockDetails> {
 		let result = self.db.read_with_cache(db::COL_EXTRA, &self.block_details, hash);
-		self.cache_man.lock().note_used(CacheID::BlockDetails(hash.clone()));
+		self.cache_man.lock().note_used(CacheId::BlockDetails(hash.clone()));
 		result
 	}
 
 	/// Get the hash of given block's number.
 	fn block_hash(&self, index: BlockNumber) -> Option<H256> {
 		let result = self.db.read_with_cache(db::COL_EXTRA, &self.block_hashes, &index);
-		self.cache_man.lock().note_used(CacheID::BlockHashes(index));
+		self.cache_man.lock().note_used(CacheId::BlockHashes(index));
 		result
 	}
 
 	/// Get the address of transaction with given hash.
 	fn transaction_address(&self, hash: &H256) -> Option<TransactionAddress> {
 		let result = self.db.read_with_cache(db::COL_EXTRA, &self.transaction_addresses, hash);
-		self.cache_man.lock().note_used(CacheID::TransactionAddresses(hash.clone()));
+		self.cache_man.lock().note_used(CacheId::TransactionAddresses(hash.clone()));
 		result
 	}
 
 	/// Get receipts of block with given hash.
 	fn block_receipts(&self, hash: &H256) -> Option<BlockReceipts> {
 		let result = self.db.read_with_cache(db::COL_EXTRA, &self.block_receipts, hash);
-		self.cache_man.lock().note_used(CacheID::BlockReceipts(hash.clone()));
+		self.cache_man.lock().note_used(CacheId::BlockReceipts(hash.clone()));
 		result
 	}
 
@@ -809,7 +809,7 @@ impl BlockChain {
 		let mut write_details = self.block_details.write();
 		batch.extend_with_cache(db::COL_EXTRA, &mut *write_details, update, CacheUpdatePolicy::Overwrite);
 
-		self.cache_man.lock().note_used(CacheID::BlockDetails(block_hash));
+		self.cache_man.lock().note_used(CacheId::BlockDetails(block_hash));
 	}
 
 	#[cfg_attr(feature="dev", allow(similar_names))]
@@ -968,15 +968,15 @@ impl BlockChain {
 
 		let mut cache_man = self.cache_man.lock();
 		for n in pending_hashes_keys {
-			cache_man.note_used(CacheID::BlockHashes(n));
+			cache_man.note_used(CacheId::BlockHashes(n));
 		}
 
 		for hash in enacted_txs_keys {
-			cache_man.note_used(CacheID::TransactionAddresses(hash));
+			cache_man.note_used(CacheId::TransactionAddresses(hash));
 		}
 
 		for hash in pending_block_hashes {
-			cache_man.note_used(CacheID::BlockDetails(hash));
+			cache_man.note_used(CacheId::BlockDetails(hash));
 		}
 	}
 
@@ -1244,13 +1244,13 @@ impl BlockChain {
 		cache_man.collect_garbage(current_size, | ids | {
 			for id in &ids {
 				match *id {
-					CacheID::BlockHeader(ref h) => { block_headers.remove(h); },
-					CacheID::BlockBody(ref h) => { block_bodies.remove(h); },
-					CacheID::BlockDetails(ref h) => { block_details.remove(h); }
-					CacheID::BlockHashes(ref h) => { block_hashes.remove(h); }
-					CacheID::TransactionAddresses(ref h) => { transaction_addresses.remove(h); }
-					CacheID::BlocksBlooms(ref h) => { blocks_blooms.remove(h); }
-					CacheID::BlockReceipts(ref h) => { block_receipts.remove(h); }
+					CacheId::BlockHeader(ref h) => { block_headers.remove(h); },
+					CacheId::BlockBody(ref h) => { block_bodies.remove(h); },
+					CacheId::BlockDetails(ref h) => { block_details.remove(h); }
+					CacheId::BlockHashes(ref h) => { block_hashes.remove(h); }
+					CacheId::TransactionAddresses(ref h) => { transaction_addresses.remove(h); }
+					CacheId::BlocksBlooms(ref h) => { blocks_blooms.remove(h); }
+					CacheId::BlockReceipts(ref h) => { block_receipts.remove(h); }
 				}
 			}
 

ethcore/src/client/client.rs

@@ -50,9 +50,9 @@ use log_entry::LocalizedLogEntry;
 use verification::queue::BlockQueue;
 use blockchain::{BlockChain, BlockProvider, TreeRoute, ImportRoute};
 use client::{
-	BlockID, TransactionID, UncleID, TraceId, ClientConfig, BlockChainClient,
+	BlockId, TransactionId, UncleId, TraceId, ClientConfig, BlockChainClient,
 	MiningBlockChainClient, TraceFilter, CallAnalytics, BlockImportError, Mode,
-	ChainNotify, PruningInfo, ProvingBlockChainClient,
+	ChainNotify, PruningInfo,
 };
 use client::Error as ClientError;
 use env_info::EnvInfo;
@@ -255,6 +255,11 @@ impl Client {
 		self.notify.write().push(Arc::downgrade(&target));
 	}
 
+	/// Returns engine reference.
+	pub fn engine(&self) -> &Engine {
+		&*self.engine
+	}
+
 	fn notify<F>(&self, f: F) where F: Fn(&ChainNotify) {
 		for np in self.notify.read().iter() {
 			if let Some(n) = np.upgrade() {
@@ -563,6 +568,11 @@ impl Client {
 		results.len()
 	}
 
+	/// Get shared miner reference.
+	pub fn miner(&self) -> Arc<Miner> {
+		self.miner.clone()
+	}
+
 	/// Used by PoA to try sealing on period change.
 	pub fn update_sealing(&self) {
 		self.miner.update_sealing(self)
@@ -570,13 +580,13 @@ impl Client {
 
 	/// Attempt to get a copy of a specific block's final state.
 	///
-	/// This will not fail if given BlockID::Latest.
+	/// This will not fail if given BlockId::Latest.
 	/// Otherwise, this can fail (but may not) if the DB prunes state.
-	pub fn state_at(&self, id: BlockID) -> Option<State> {
+	pub fn state_at(&self, id: BlockId) -> Option<State> {
 		// fast path for latest state.
 		match id.clone() {
-			BlockID::Pending => return self.miner.pending_state().or_else(|| Some(self.state())),
-			BlockID::Latest => return Some(self.state()),
+			BlockId::Pending => return self.miner.pending_state().or_else(|| Some(self.state())),
+			BlockId::Latest => return Some(self.state()),
 			_ => {},
 		}
 
@@ -601,15 +611,15 @@ impl Client {
 
 	/// Attempt to get a copy of a specific block's beginning state.
 	///
-	/// This will not fail if given BlockID::Latest.
+	/// This will not fail if given BlockId::Latest.
 	/// Otherwise, this can fail (but may not) if the DB prunes state.
-	pub fn state_at_beginning(&self, id: BlockID) -> Option<State> {
+	pub fn state_at_beginning(&self, id: BlockId) -> Option<State> {
 		// fast path for latest state.
 		match id {
-			BlockID::Pending => self.state_at(BlockID::Latest),
+			BlockId::Pending => self.state_at(BlockId::Latest),
 			id => match self.block_number(id) {
 				None | Some(0) => None,
-				Some(n) => self.state_at(BlockID::Number(n - 1)),
+				Some(n) => self.state_at(BlockId::Number(n - 1)),
 			}
 		}
 	}
@@ -679,18 +689,18 @@ impl Client {
 	}
 
 	/// Look up the block number for the given block ID.
-	pub fn block_number(&self, id: BlockID) -> Option<BlockNumber> {
+	pub fn block_number(&self, id: BlockId) -> Option<BlockNumber> {
 		match id {
-			BlockID::Number(number) => Some(number),
-			BlockID::Hash(ref hash) => self.chain.read().block_number(hash),
-			BlockID::Earliest => Some(0),
-			BlockID::Latest | BlockID::Pending => Some(self.chain.read().best_block_number()),
+			BlockId::Number(number) => Some(number),
+			BlockId::Hash(ref hash) => self.chain.read().block_number(hash),
+			BlockId::Earliest => Some(0),
+			BlockId::Latest | BlockId::Pending => Some(self.chain.read().best_block_number()),
 		}
 	}
 
 	/// Take a snapshot at the given block.
 	/// If the ID given is "latest", this will default to 1000 blocks behind.
-	pub fn take_snapshot<W: snapshot_io::SnapshotWriter + Send>(&self, writer: W, at: BlockID, p: &snapshot::Progress) -> Result<(), EthcoreError> {
+	pub fn take_snapshot<W: snapshot_io::SnapshotWriter + Send>(&self, writer: W, at: BlockId, p: &snapshot::Progress) -> Result<(), EthcoreError> {
 		let db = self.state_db.lock().journal_db().boxed_clone();
 		let best_block_number = self.chain_info().best_block_number;
 		let block_number = try!(self.block_number(at).ok_or(snapshot::Error::InvalidStartingBlock(at)));
@@ -702,13 +712,13 @@ impl Client {
 		let history = ::std::cmp::min(self.history, 1000);
 
 		let start_hash = match at {
-			BlockID::Latest => {
+			BlockId::Latest => {
 				let start_num = match db.earliest_era() {
 					Some(era) => ::std::cmp::max(era, best_block_number - history),
 					None => best_block_number - history,
 				};
 
-				match self.block_hash(BlockID::Number(start_num)) {
+				match self.block_hash(BlockId::Number(start_num)) {
 					Some(h) => h,
 					None => return Err(snapshot::Error::InvalidStartingBlock(at).into()),
 				}
@@ -729,19 +739,19 @@ impl Client {
 		self.history
 	}
 
-	fn block_hash(chain: &BlockChain, id: BlockID) -> Option<H256> {
+	fn block_hash(chain: &BlockChain, id: BlockId) -> Option<H256> {
 		match id {
-			BlockID::Hash(hash) => Some(hash),
-			BlockID::Number(number) => chain.block_hash(number),
-			BlockID::Earliest => chain.block_hash(0),
-			BlockID::Latest | BlockID::Pending => Some(chain.best_block_hash()),
+			BlockId::Hash(hash) => Some(hash),
+			BlockId::Number(number) => chain.block_hash(number),
+			BlockId::Earliest => chain.block_hash(0),
+			BlockId::Latest | BlockId::Pending => Some(chain.best_block_hash()),
 		}
 	}
 
-	fn transaction_address(&self, id: TransactionID) -> Option<TransactionAddress> {
+	fn transaction_address(&self, id: TransactionId) -> Option<TransactionAddress> {
 		match id {
-			TransactionID::Hash(ref hash) => self.chain.read().transaction_address(hash),
-			TransactionID::Location(id, index) => Self::block_hash(&self.chain.read(), id).map(|hash| TransactionAddress {
+			TransactionId::Hash(ref hash) => self.chain.read().transaction_address(hash),
+			TransactionId::Location(id, index) => Self::block_hash(&self.chain.read(), id).map(|hash| TransactionAddress {
 				block_hash: hash,
 				index: index,
 			})
@@ -795,7 +805,7 @@ impl snapshot::DatabaseRestore for Client {
 
 
 impl BlockChainClient for Client {
-	fn call(&self, t: &SignedTransaction, block: BlockID, analytics: CallAnalytics) -> Result<Executed, CallError> {
+	fn call(&self, t: &SignedTransaction, block: BlockId, analytics: CallAnalytics) -> Result<Executed, CallError> {
 		let header = try!(self.block_header(block).ok_or(CallError::StatePruned));
 		let view = HeaderView::new(&header);
 		let last_hashes = self.build_last_hashes(view.parent_hash());
@@ -831,11 +841,11 @@ impl BlockChainClient for Client {
 		Ok(ret)
 	}
 
-	fn replay(&self, id: TransactionID, analytics: CallAnalytics) -> Result<Executed, CallError> {
+	fn replay(&self, id: TransactionId, analytics: CallAnalytics) -> Result<Executed, CallError> {
 		let address = try!(self.transaction_address(id).ok_or(CallError::TransactionNotFound));
-		let header_data = try!(self.block_header(BlockID::Hash(address.block_hash)).ok_or(CallError::StatePruned));
-		let body_data = try!(self.block_body(BlockID::Hash(address.block_hash)).ok_or(CallError::StatePruned));
-		let mut state = try!(self.state_at_beginning(BlockID::Hash(address.block_hash)).ok_or(CallError::StatePruned));
+		let header_data = try!(self.block_header(BlockId::Hash(address.block_hash)).ok_or(CallError::StatePruned));
+		let body_data = try!(self.block_body(BlockId::Hash(address.block_hash)).ok_or(CallError::StatePruned));
+		let mut state = try!(self.state_at_beginning(BlockId::Hash(address.block_hash)).ok_or(CallError::StatePruned));
 		let txs = BodyView::new(&body_data).transactions();
 
 		if address.index >= txs.len() {
@@ -908,18 +918,18 @@ impl BlockChainClient for Client {
 		self.chain.read().best_block_header()
 	}
 
-	fn block_header(&self, id: BlockID) -> Option<Bytes> {
+	fn block_header(&self, id: BlockId) -> Option<Bytes> {
 		let chain = self.chain.read();
 		Self::block_hash(&chain, id).and_then(|hash| chain.block_header_data(&hash))
 	}
 
-	fn block_body(&self, id: BlockID) -> Option<Bytes> {
+	fn block_body(&self, id: BlockId) -> Option<Bytes> {
 		let chain = self.chain.read();
 		Self::block_hash(&chain, id).and_then(|hash| chain.block_body(&hash))
 	}
 
-	fn block(&self, id: BlockID) -> Option<Bytes> {
-		if let BlockID::Pending = id {
+	fn block(&self, id: BlockId) -> Option<Bytes> {
+		if let BlockId::Pending = id {
 			if let Some(block) = self.miner.pending_block() {
 				return Some(block.rlp_bytes(Seal::Without));
 			}
@@ -930,7 +940,7 @@ impl BlockChainClient for Client {
 		})
 	}
 
-	fn block_status(&self, id: BlockID) -> BlockStatus {
+	fn block_status(&self, id: BlockId) -> BlockStatus {
 		let chain = self.chain.read();
 		match Self::block_hash(&chain, id) {
 			Some(ref hash) if chain.is_known(hash) => BlockStatus::InChain,
@@ -939,42 +949,42 @@ impl BlockChainClient for Client {
 		}
 	}
 
-	fn block_total_difficulty(&self, id: BlockID) -> Option<U256> {
-		if let BlockID::Pending = id {
+	fn block_total_difficulty(&self, id: BlockId) -> Option<U256> {
+		if let BlockId::Pending = id {
 			if let Some(block) = self.miner.pending_block() {
-				return Some(*block.header.difficulty() + self.block_total_difficulty(BlockID::Latest).expect("blocks in chain have details; qed"));
+				return Some(*block.header.difficulty() + self.block_total_difficulty(BlockId::Latest).expect("blocks in chain have details; qed"));
 			}
 		}
 		let chain = self.chain.read();
 		Self::block_hash(&chain, id).and_then(|hash| chain.block_details(&hash)).map(|d| d.total_difficulty)
 	}
 
-	fn nonce(&self, address: &Address, id: BlockID) -> Option<U256> {
+	fn nonce(&self, address: &Address, id: BlockId) -> Option<U256> {
 		self.state_at(id).map(|s| s.nonce(address))
 	}
 
-	fn storage_root(&self, address: &Address, id: BlockID) -> Option<H256> {
+	fn storage_root(&self, address: &Address, id: BlockId) -> Option<H256> {
 		self.state_at(id).and_then(|s| s.storage_root(address))
 	}
 
-	fn block_hash(&self, id: BlockID) -> Option<H256> {
+	fn block_hash(&self, id: BlockId) -> Option<H256> {
 		let chain = self.chain.read();
 		Self::block_hash(&chain, id)
 	}
 
-	fn code(&self, address: &Address, id: BlockID) -> Option<Option<Bytes>> {
+	fn code(&self, address: &Address, id: BlockId) -> Option<Option<Bytes>> {
 		self.state_at(id).map(|s| s.code(address).map(|c| (*c).clone()))
 	}
 
-	fn balance(&self, address: &Address, id: BlockID) -> Option<U256> {
+	fn balance(&self, address: &Address, id: BlockId) -> Option<U256> {
 		self.state_at(id).map(|s| s.balance(address))
 	}
 
-	fn storage_at(&self, address: &Address, position: &H256, id: BlockID) -> Option<H256> {
+	fn storage_at(&self, address: &Address, position: &H256, id: BlockId) -> Option<H256> {
 		self.state_at(id).map(|s| s.storage_at(address, position))
 	}
 
-	fn list_accounts(&self, id: BlockID, after: Option<&Address>, count: u64) -> Option<Vec<Address>> {
+	fn list_accounts(&self, id: BlockId, after: Option<&Address>, count: u64) -> Option<Vec<Address>> {
 		if !self.factories.trie.is_fat() {
 			trace!(target: "fatdb", "list_accounts: Not a fat DB");
 			return None;
@@ -1012,7 +1022,7 @@ impl BlockChainClient for Client {
 		Some(accounts)
 	}
 
-	fn list_storage(&self, id: BlockID, account: &Address, after: Option<&H256>, count: u64) -> Option<Vec<H256>> {
+	fn list_storage(&self, id: BlockId, account: &Address, after: Option<&H256>, count: u64) -> Option<Vec<H256>> {
 		if !self.factories.trie.is_fat() {
 			trace!(target: "fatdb", "list_stroage: Not a fat DB");
 			return None;
@@ -1056,16 +1066,20 @@ impl BlockChainClient for Client {
 		Some(keys)
 	}
 
-	fn transaction(&self, id: TransactionID) -> Option<LocalizedTransaction> {
+	fn transaction(&self, id: TransactionId) -> Option<LocalizedTransaction> {
 		self.transaction_address(id).and_then(|address| self.chain.read().transaction(&address))
 	}
 
-	fn uncle(&self, id: UncleID) -> Option<Bytes> {
+	fn transaction_block(&self, id: TransactionId) -> Option<H256> {
+		self.transaction_address(id).map(|addr| addr.block_hash)
+	}
+
+	fn uncle(&self, id: UncleId) -> Option<Bytes> {
 		let index = id.position;
 		self.block_body(id.block).and_then(|body| BodyView::new(&body).uncle_rlp_at(index))
 	}
 
-	fn transaction_receipt(&self, id: TransactionID) -> Option<LocalizedReceipt> {
+	fn transaction_receipt(&self, id: TransactionId) -> Option<LocalizedReceipt> {
 		let chain = self.chain.read();
 		self.transaction_address(id)
 			.and_then(|address| chain.block_number(&address.block_hash).and_then(|block_number| {
@@ -1149,7 +1163,7 @@ impl BlockChainClient for Client {
 			if self.chain.read().is_known(&unverified.hash()) {
 				return Err(BlockImportError::Import(ImportError::AlreadyInChain));
 			}
-			if self.block_status(BlockID::Hash(unverified.parent_hash())) == BlockStatus::Unknown {
+			if self.block_status(BlockId::Hash(unverified.parent_hash())) == BlockStatus::Unknown {
 				return Err(BlockImportError::Block(BlockError::UnknownParent(unverified.parent_hash())));
 			}
 		}
@@ -1163,7 +1177,7 @@ impl BlockChainClient for Client {
 			if self.chain.read().is_known(&header.hash()) {
 				return Err(BlockImportError::Import(ImportError::AlreadyInChain));
 			}
-			if self.block_status(BlockID::Hash(header.parent_hash())) == BlockStatus::Unknown {
+			if self.block_status(BlockId::Hash(header.parent_hash())) == BlockStatus::Unknown {
 				return Err(BlockImportError::Block(BlockError::UnknownParent(header.parent_hash())));
 			}
 		}
@@ -1186,7 +1200,7 @@ impl BlockChainClient for Client {
 		self.engine.additional_params().into_iter().collect()
 	}
 
-	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockID, to_block: BlockID) -> Option<Vec<BlockNumber>> {
+	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockId, to_block: BlockId) -> Option<Vec<BlockNumber>> {
 		match (self.block_number(from_block), self.block_number(to_block)) {
 			(Some(from), Some(to)) => Some(self.chain.read().blocks_with_bloom(bloom, from, to)),
 			_ => None
@@ -1228,20 +1242,20 @@ impl BlockChainClient for Client {
 		let trace_address = trace.address;
 		self.transaction_address(trace.transaction)
 			.and_then(|tx_address| {
-				self.block_number(BlockID::Hash(tx_address.block_hash))
+				self.block_number(BlockId::Hash(tx_address.block_hash))
 					.and_then(|number| self.tracedb.read().trace(number, tx_address.index, trace_address))
 			})
 	}
 
-	fn transaction_traces(&self, transaction: TransactionID) -> Option<Vec<LocalizedTrace>> {
+	fn transaction_traces(&self, transaction: TransactionId) -> Option<Vec<LocalizedTrace>> {
 		self.transaction_address(transaction)
 			.and_then(|tx_address| {
-				self.block_number(BlockID::Hash(tx_address.block_hash))
+				self.block_number(BlockId::Hash(tx_address.block_hash))
 					.and_then(|number| self.tracedb.read().transaction_traces(number, tx_address.index))
 			})
 	}
 
-	fn block_traces(&self, block: BlockID) -> Option<Vec<LocalizedTrace>> {
+	fn block_traces(&self, block: BlockId) -> Option<Vec<LocalizedTrace>> {
 		self.block_number(block)
 			.and_then(|number| self.tracedb.read().block_traces(number))
 	}
@@ -1276,13 +1290,13 @@ impl BlockChainClient for Client {
 		self.engine.signing_network_id(&self.latest_env_info())
 	}
 
-	fn block_extra_info(&self, id: BlockID) -> Option<BTreeMap<String, String>> {
+	fn block_extra_info(&self, id: BlockId) -> Option<BTreeMap<String, String>> {
 		self.block_header(id)
 			.map(|block| decode(&block))
 			.map(|header| self.engine.extra_info(&header))
 	}
 
-	fn uncle_extra_info(&self, id: UncleID) -> Option<BTreeMap<String, String>> {
+	fn uncle_extra_info(&self, id: UncleId) -> Option<BTreeMap<String, String>> {
 		self.uncle(id)
 			.map(|header| self.engine.extra_info(&decode(&header)))
 	}
@@ -1377,20 +1391,20 @@ impl MayPanic for Client {
 	}
 }
 
-impl ProvingBlockChainClient for Client {
-	fn prove_storage(&self, key1: H256, key2: H256, from_level: u32, id: BlockID) -> Vec<Bytes> {
+impl ::client::ProvingBlockChainClient for Client {
+	fn prove_storage(&self, key1: H256, key2: H256, from_level: u32, id: BlockId) -> Vec<Bytes> {
 		self.state_at(id)
 			.and_then(move |state| state.prove_storage(key1, key2, from_level).ok())
 			.unwrap_or_else(Vec::new)
 	}
 
-	fn prove_account(&self, key1: H256, from_level: u32, id: BlockID) -> Vec<Bytes> {
+	fn prove_account(&self, key1: H256, from_level: u32, id: BlockId) -> Vec<Bytes> {
 		self.state_at(id)
 			.and_then(move |state| state.prove_account(key1, from_level).ok())
 			.unwrap_or_else(Vec::new)
 	}
 
-	fn code_by_hash(&self, account_key: H256, id: BlockID) -> Bytes {
+	fn code_by_hash(&self, account_key: H256, id: BlockId) -> Bytes {
 		self.state_at(id)
 			.and_then(move |state| state.code_by_address_hash(account_key).ok())
 			.and_then(|x| x)

ethcore/src/client/mod.rs

@@ -27,7 +27,9 @@ pub use self::config::{Mode, ClientConfig, DatabaseCompactionProfile, BlockChain
 pub use self::error::Error;
 pub use self::test_client::{TestBlockChainClient, EachBlockWith};
 pub use self::chain_notify::ChainNotify;
-pub use self::traits::{BlockChainClient, MiningBlockChainClient, ProvingBlockChainClient};
+pub use self::traits::{BlockChainClient, MiningBlockChainClient};
+
+pub use self::traits::ProvingBlockChainClient;
 
 pub use types::ids::*;
 pub use types::trace_filter::Filter as TraceFilter;

ethcore/src/client/test_client.rs

@@ -24,8 +24,8 @@ use devtools::*;
 use transaction::{Transaction, LocalizedTransaction, SignedTransaction, Action};
 use blockchain::TreeRoute;
 use client::{
-	BlockChainClient, MiningBlockChainClient, BlockChainInfo, BlockStatus, BlockID,
-	TransactionID, UncleID, TraceId, TraceFilter, LastHashes, CallAnalytics, BlockImportError,
+	BlockChainClient, MiningBlockChainClient, BlockChainInfo, BlockStatus, BlockId,
+	TransactionId, UncleId, TraceId, TraceFilter, LastHashes, CallAnalytics, BlockImportError,
 };
 use db::{NUM_COLUMNS, COL_STATE};
 use header::{Header as BlockHeader, BlockNumber};
@@ -73,7 +73,7 @@ pub struct TestBlockChainClient {
 	/// Execution result.
 	pub execution_result: RwLock<Option<Result<Executed, CallError>>>,
 	/// Transaction receipts.
-	pub receipts: RwLock<HashMap<TransactionID, LocalizedReceipt>>,
+	pub receipts: RwLock<HashMap<TransactionId, LocalizedReceipt>>,
 	/// Logs
 	pub logs: RwLock<Vec<LocalizedLogEntry>>,
 	/// Block queue size.
@@ -92,8 +92,8 @@ pub struct TestBlockChainClient {
 	pub first_block: RwLock<Option<(H256, u64)>>,
 }
 
-#[derive(Clone)]
 /// Used for generating test client blocks.
+#[derive(Clone)]
 pub enum EachBlockWith {
 	/// Plain block.
 	Nothing,
@@ -158,7 +158,7 @@ impl TestBlockChainClient {
 	}
 
 	/// Set the transaction receipt result
-	pub fn set_transaction_receipt(&self, id: TransactionID, receipt: LocalizedReceipt) {
+	pub fn set_transaction_receipt(&self, id: TransactionId, receipt: LocalizedReceipt) {
 		self.receipts.write().insert(id, receipt);
 	}
 
@@ -255,9 +255,9 @@ impl TestBlockChainClient {
 	}
 
 	/// Make a bad block by setting invalid extra data.
-	pub fn corrupt_block(&mut self, n: BlockNumber) {
-		let hash = self.block_hash(BlockID::Number(n)).unwrap();
-		let mut header: BlockHeader = decode(&self.block_header(BlockID::Number(n)).unwrap());
+	pub fn corrupt_block(&self, n: BlockNumber) {
+		let hash = self.block_hash(BlockId::Number(n)).unwrap();
+		let mut header: BlockHeader = decode(&self.block_header(BlockId::Number(n)).unwrap());
 		header.set_extra_data(b"This extra data is way too long to be considered valid".to_vec());
 		let mut rlp = RlpStream::new_list(3);
 		rlp.append(&header);
@@ -267,9 +267,9 @@ impl TestBlockChainClient {
 	}
 
 	/// Make a bad block by setting invalid parent hash.
-	pub fn corrupt_block_parent(&mut self, n: BlockNumber) {
-		let hash = self.block_hash(BlockID::Number(n)).unwrap();
-		let mut header: BlockHeader = decode(&self.block_header(BlockID::Number(n)).unwrap());
+	pub fn corrupt_block_parent(&self, n: BlockNumber) {
+		let hash = self.block_hash(BlockId::Number(n)).unwrap();
+		let mut header: BlockHeader = decode(&self.block_header(BlockId::Number(n)).unwrap());
 		header.set_parent_hash(H256::from(42));
 		let mut rlp = RlpStream::new_list(3);
 		rlp.append(&header);
@@ -285,12 +285,12 @@ impl TestBlockChainClient {
 		blocks_read[&index].clone()
 	}
 
-	fn block_hash(&self, id: BlockID) -> Option<H256> {
+	fn block_hash(&self, id: BlockId) -> Option<H256> {
 		match id {
-			BlockID::Hash(hash) => Some(hash),
-			BlockID::Number(n) => self.numbers.read().get(&(n as usize)).cloned(),
-			BlockID::Earliest => self.numbers.read().get(&0).cloned(),
-			BlockID::Latest | BlockID::Pending => self.numbers.read().get(&(self.numbers.read().len() - 1)).cloned()
+			BlockId::Hash(hash) => Some(hash),
+			BlockId::Number(n) => self.numbers.read().get(&(n as usize)).cloned(),
+			BlockId::Earliest => self.numbers.read().get(&0).cloned(),
+			BlockId::Latest | BlockId::Pending => self.numbers.read().get(&(self.numbers.read().len() - 1)).cloned()
 		}
 	}
 
@@ -363,46 +363,46 @@ impl MiningBlockChainClient for TestBlockChainClient {
 }
 
 impl BlockChainClient for TestBlockChainClient {
-	fn call(&self, _t: &SignedTransaction, _block: BlockID, _analytics: CallAnalytics) -> Result<Executed, CallError> {
+	fn call(&self, _t: &SignedTransaction, _block: BlockId, _analytics: CallAnalytics) -> Result<Executed, CallError> {
 		self.execution_result.read().clone().unwrap()
 	}
 
-	fn replay(&self, _id: TransactionID, _analytics: CallAnalytics) -> Result<Executed, CallError> {
+	fn replay(&self, _id: TransactionId, _analytics: CallAnalytics) -> Result<Executed, CallError> {
 		self.execution_result.read().clone().unwrap()
 	}
 
-	fn block_total_difficulty(&self, _id: BlockID) -> Option<U256> {
+	fn block_total_difficulty(&self, _id: BlockId) -> Option<U256> {
 		Some(U256::zero())
 	}
 
-	fn block_hash(&self, id: BlockID) -> Option<H256> {
+	fn block_hash(&self, id: BlockId) -> Option<H256> {
 		Self::block_hash(self, id)
 	}
 
-	fn nonce(&self, address: &Address, id: BlockID) -> Option<U256> {
+	fn nonce(&self, address: &Address, id: BlockId) -> Option<U256> {
 		match id {
-			BlockID::Latest => Some(self.nonces.read().get(address).cloned().unwrap_or(self.spec.params.account_start_nonce)),
+			BlockId::Latest => Some(self.nonces.read().get(address).cloned().unwrap_or(self.spec.params.account_start_nonce)),
 			_ => None,
 		}
 	}
 
-	fn storage_root(&self, _address: &Address, _id: BlockID) -> Option<H256> {
+	fn storage_root(&self, _address: &Address, _id: BlockId) -> Option<H256> {
 		None
 	}
 
 	fn latest_nonce(&self, address: &Address) -> U256 {
-		self.nonce(address, BlockID::Latest).unwrap()
+		self.nonce(address, BlockId::Latest).unwrap()
 	}
 
-	fn code(&self, address: &Address, id: BlockID) -> Option<Option<Bytes>> {
+	fn code(&self, address: &Address, id: BlockId) -> Option<Option<Bytes>> {
 		match id {
-			BlockID::Latest => Some(self.code.read().get(address).cloned()),
+			BlockId::Latest => Some(self.code.read().get(address).cloned()),
 			_ => None,
 		}
 	}
 
-	fn balance(&self, address: &Address, id: BlockID) -> Option<U256> {
-		if let BlockID::Latest = id {
+	fn balance(&self, address: &Address, id: BlockId) -> Option<U256> {
+		if let BlockId::Latest = id {
 			Some(self.balances.read().get(address).cloned().unwrap_or_else(U256::zero))
 		} else {
 			None
@@ -410,41 +410,45 @@ impl BlockChainClient for TestBlockChainClient {
 	}
 
 	fn latest_balance(&self, address: &Address) -> U256 {
-		self.balance(address, BlockID::Latest).unwrap()
+		self.balance(address, BlockId::Latest).unwrap()
 	}
 
-	fn storage_at(&self, address: &Address, position: &H256, id: BlockID) -> Option<H256> {
-		if let BlockID::Latest = id {
+	fn storage_at(&self, address: &Address, position: &H256, id: BlockId) -> Option<H256> {
+		if let BlockId::Latest = id {
 			Some(self.storage.read().get(&(address.clone(), position.clone())).cloned().unwrap_or_else(H256::new))
 		} else {
 			None
 		}
 	}
 
-	fn list_accounts(&self, _id: BlockID, _after: Option<&Address>, _count: u64) -> Option<Vec<Address>> {
+	fn list_accounts(&self, _id: BlockId, _after: Option<&Address>, _count: u64) -> Option<Vec<Address>> {
 		None
 	}
 
-	fn list_storage(&self, _id: BlockID, _account: &Address, _after: Option<&H256>, _count: u64) -> Option<Vec<H256>> {
+	fn list_storage(&self, _id: BlockId, _account: &Address, _after: Option<&H256>, _count: u64) -> Option<Vec<H256>> {
 		None
 	}
-	fn transaction(&self, _id: TransactionID) -> Option<LocalizedTransaction> {
+	fn transaction(&self, _id: TransactionId) -> Option<LocalizedTransaction> {
 		None	// Simple default.
 	}
 
-	fn uncle(&self, _id: UncleID) -> Option<Bytes> {
+	fn transaction_block(&self, _id: TransactionId) -> Option<H256> {
 		None	// Simple default.
 	}
 
-	fn uncle_extra_info(&self, _id: UncleID) -> Option<BTreeMap<String, String>> {
+	fn uncle(&self, _id: UncleId) -> Option<Bytes> {
+		None	// Simple default.
+	}
+
+	fn uncle_extra_info(&self, _id: UncleId) -> Option<BTreeMap<String, String>> {
 		None
 	}
 
-	fn transaction_receipt(&self, id: TransactionID) -> Option<LocalizedReceipt> {
+	fn transaction_receipt(&self, id: TransactionId) -> Option<LocalizedReceipt> {
 		self.receipts.read().get(&id).cloned()
 	}
 
-	fn blocks_with_bloom(&self, _bloom: &H2048, _from_block: BlockID, _to_block: BlockID) -> Option<Vec<BlockNumber>> {
+	fn blocks_with_bloom(&self, _bloom: &H2048, _from_block: BlockId, _to_block: BlockId) -> Option<Vec<BlockNumber>> {
 		unimplemented!();
 	}
 
@@ -462,14 +466,14 @@ impl BlockChainClient for TestBlockChainClient {
 	}
 
 	fn best_block_header(&self) -> Bytes {
-		self.block_header(BlockID::Hash(self.chain_info().best_block_hash)).expect("Best block always have header.")
+		self.block_header(BlockId::Hash(self.chain_info().best_block_hash)).expect("Best block always have header.")
 	}
 
-	fn block_header(&self, id: BlockID) -> Option<Bytes> {
+	fn block_header(&self, id: BlockId) -> Option<Bytes> {
 		self.block_hash(id).and_then(|hash| self.blocks.read().get(&hash).map(|r| Rlp::new(r).at(0).as_raw().to_vec()))
 	}
 
-	fn block_body(&self, id: BlockID) -> Option<Bytes> {
+	fn block_body(&self, id: BlockId) -> Option<Bytes> {
 		self.block_hash(id).and_then(|hash| self.blocks.read().get(&hash).map(|r| {
 			let mut stream = RlpStream::new_list(2);
 			stream.append_raw(Rlp::new(r).at(1).as_raw(), 1);
@@ -478,21 +482,21 @@ impl BlockChainClient for TestBlockChainClient {
 		}))
 	}
 
-	fn block(&self, id: BlockID) -> Option<Bytes> {
+	fn block(&self, id: BlockId) -> Option<Bytes> {
 		self.block_hash(id).and_then(|hash| self.blocks.read().get(&hash).cloned())
 	}
 
-	fn block_extra_info(&self, id: BlockID) -> Option<BTreeMap<String, String>> {
+	fn block_extra_info(&self, id: BlockId) -> Option<BTreeMap<String, String>> {
 		self.block(id)
 			.map(|block| BlockView::new(&block).header())
 			.map(|header| self.spec.engine.extra_info(&header))
 	}
 
 
-	fn block_status(&self, id: BlockID) -> BlockStatus {
+	fn block_status(&self, id: BlockId) -> BlockStatus {
 		match id {
-			BlockID::Number(number) if (number as usize) < self.blocks.read().len() => BlockStatus::InChain,
-			BlockID::Hash(ref hash) if self.blocks.read().get(hash).is_some() => BlockStatus::InChain,
+			BlockId::Number(number) if (number as usize) < self.blocks.read().len() => BlockStatus::InChain,
+			BlockId::Hash(ref hash) if self.blocks.read().get(hash).is_some() => BlockStatus::InChain,
 			_ => BlockStatus::Unknown
 		}
 	}
@@ -645,11 +649,11 @@ impl BlockChainClient for TestBlockChainClient {
 		unimplemented!();
 	}
 
-	fn transaction_traces(&self, _trace: TransactionID) -> Option<Vec<LocalizedTrace>> {
+	fn transaction_traces(&self, _trace: TransactionId) -> Option<Vec<LocalizedTrace>> {
 		unimplemented!();
 	}
 
-	fn block_traces(&self, _trace: BlockID) -> Option<Vec<LocalizedTrace>> {
+	fn block_traces(&self, _trace: BlockId) -> Option<Vec<LocalizedTrace>> {
 		unimplemented!();
 	}
 

ethcore/src/client/traits.rs

@@ -50,90 +50,93 @@ pub trait BlockChainClient : Sync + Send {
 	fn keep_alive(&self) {}
 
 	/// Get raw block header data by block id.
-	fn block_header(&self, id: BlockID) -> Option<Bytes>;
+	fn block_header(&self, id: BlockId) -> Option<Bytes>;
 
 	/// Get raw block body data by block id.
 	/// Block body is an RLP list of two items: uncles and transactions.
-	fn block_body(&self, id: BlockID) -> Option<Bytes>;
+	fn block_body(&self, id: BlockId) -> Option<Bytes>;
 
 	/// Get raw block data by block header hash.
-	fn block(&self, id: BlockID) -> Option<Bytes>;
+	fn block(&self, id: BlockId) -> Option<Bytes>;
 
 	/// Get block status by block header hash.
-	fn block_status(&self, id: BlockID) -> BlockStatus;
+	fn block_status(&self, id: BlockId) -> BlockStatus;
 
 	/// Get block total difficulty.
-	fn block_total_difficulty(&self, id: BlockID) -> Option<U256>;
+	fn block_total_difficulty(&self, id: BlockId) -> Option<U256>;
 
 	/// Attempt to get address nonce at given block.
-	/// May not fail on BlockID::Latest.
-	fn nonce(&self, address: &Address, id: BlockID) -> Option<U256>;
+	/// May not fail on BlockId::Latest.
+	fn nonce(&self, address: &Address, id: BlockId) -> Option<U256>;
 
 	/// Attempt to get address storage root at given block.
-	/// May not fail on BlockID::Latest.
-	fn storage_root(&self, address: &Address, id: BlockID) -> Option<H256>;
+	/// May not fail on BlockId::Latest.
+	fn storage_root(&self, address: &Address, id: BlockId) -> Option<H256>;
 
 	/// Get address nonce at the latest block's state.
 	fn latest_nonce(&self, address: &Address) -> U256 {
-		self.nonce(address, BlockID::Latest)
-			.expect("nonce will return Some when given BlockID::Latest. nonce was given BlockID::Latest. \
+		self.nonce(address, BlockId::Latest)
+			.expect("nonce will return Some when given BlockId::Latest. nonce was given BlockId::Latest. \
 			Therefore nonce has returned Some; qed")
 	}
 
 	/// Get block hash.
-	fn block_hash(&self, id: BlockID) -> Option<H256>;
+	fn block_hash(&self, id: BlockId) -> Option<H256>;
 
 	/// Get address code at given block's state.
-	fn code(&self, address: &Address, id: BlockID) -> Option<Option<Bytes>>;
+	fn code(&self, address: &Address, id: BlockId) -> Option<Option<Bytes>>;
 
 	/// Get address code at the latest block's state.
 	fn latest_code(&self, address: &Address) -> Option<Bytes> {
-		self.code(address, BlockID::Latest)
-			.expect("code will return Some if given BlockID::Latest; qed")
+		self.code(address, BlockId::Latest)
+			.expect("code will return Some if given BlockId::Latest; qed")
 	}
 
 	/// Get address balance at the given block's state.
 	///
-	/// May not return None if given BlockID::Latest.
+	/// May not return None if given BlockId::Latest.
 	/// Returns None if and only if the block's root hash has been pruned from the DB.
-	fn balance(&self, address: &Address, id: BlockID) -> Option<U256>;
+	fn balance(&self, address: &Address, id: BlockId) -> Option<U256>;
 
 	/// Get address balance at the latest block's state.
 	fn latest_balance(&self, address: &Address) -> U256 {
-		self.balance(address, BlockID::Latest)
-			.expect("balance will return Some if given BlockID::Latest. balance was given BlockID::Latest \
+		self.balance(address, BlockId::Latest)
+			.expect("balance will return Some if given BlockId::Latest. balance was given BlockId::Latest \
 			Therefore balance has returned Some; qed")
 	}
 
 	/// Get value of the storage at given position at the given block's state.
 	///
-	/// May not return None if given BlockID::Latest.
+	/// May not return None if given BlockId::Latest.
 	/// Returns None if and only if the block's root hash has been pruned from the DB.
-	fn storage_at(&self, address: &Address, position: &H256, id: BlockID) -> Option<H256>;
+	fn storage_at(&self, address: &Address, position: &H256, id: BlockId) -> Option<H256>;
 
 	/// Get value of the storage at given position at the latest block's state.
 	fn latest_storage_at(&self, address: &Address, position: &H256) -> H256 {
-		self.storage_at(address, position, BlockID::Latest)
-			.expect("storage_at will return Some if given BlockID::Latest. storage_at was given BlockID::Latest. \
+		self.storage_at(address, position, BlockId::Latest)
+			.expect("storage_at will return Some if given BlockId::Latest. storage_at was given BlockId::Latest. \
 			Therefore storage_at has returned Some; qed")
 	}
 
 	/// Get a list of all accounts in the block `id`, if fat DB is in operation, otherwise `None`.
 	/// If `after` is set the list starts with the following item.
-	fn list_accounts(&self, id: BlockID, after: Option<&Address>, count: u64) -> Option<Vec<Address>>;
+	fn list_accounts(&self, id: BlockId, after: Option<&Address>, count: u64) -> Option<Vec<Address>>;
 
 	/// Get a list of all storage keys in the block `id`, if fat DB is in operation, otherwise `None`.
 	/// If `after` is set the list starts with the following item.
-	fn list_storage(&self, id: BlockID, account: &Address, after: Option<&H256>, count: u64) -> Option<Vec<H256>>;
+	fn list_storage(&self, id: BlockId, account: &Address, after: Option<&H256>, count: u64) -> Option<Vec<H256>>;
 
 	/// Get transaction with given hash.
-	fn transaction(&self, id: TransactionID) -> Option<LocalizedTransaction>;
+	fn transaction(&self, id: TransactionId) -> Option<LocalizedTransaction>;
+
+	/// Get the hash of block that contains the transaction, if any.
+	fn transaction_block(&self, id: TransactionId) -> Option<H256>;
 
 	/// Get uncle with given id.
-	fn uncle(&self, id: UncleID) -> Option<Bytes>;
+	fn uncle(&self, id: UncleId) -> Option<Bytes>;
 
 	/// Get transaction receipt with given hash.
-	fn transaction_receipt(&self, id: TransactionID) -> Option<LocalizedReceipt>;
+	fn transaction_receipt(&self, id: TransactionId) -> Option<LocalizedReceipt>;
 
 	/// Get a tree route between `from` and `to`.
 	/// See `BlockChain::tree_route`.
@@ -170,16 +173,16 @@ pub trait BlockChainClient : Sync + Send {
 	fn best_block_header(&self) -> Bytes;
 
 	/// Returns numbers of blocks containing given bloom.
-	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockID, to_block: BlockID) -> Option<Vec<BlockNumber>>;
+	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockId, to_block: BlockId) -> Option<Vec<BlockNumber>>;
 
 	/// Returns logs matching given filter.
 	fn logs(&self, filter: Filter) -> Vec<LocalizedLogEntry>;
 
 	/// Makes a non-persistent transaction call.
-	fn call(&self, t: &SignedTransaction, block: BlockID, analytics: CallAnalytics) -> Result<Executed, CallError>;
+	fn call(&self, t: &SignedTransaction, block: BlockId, analytics: CallAnalytics) -> Result<Executed, CallError>;
 
 	/// Replays a given transaction for inspection.
-	fn replay(&self, t: TransactionID, analytics: CallAnalytics) -> Result<Executed, CallError>;
+	fn replay(&self, t: TransactionId, analytics: CallAnalytics) -> Result<Executed, CallError>;
 
 	/// Returns traces matching given filter.
 	fn filter_traces(&self, filter: TraceFilter) -> Option<Vec<LocalizedTrace>>;
@@ -188,10 +191,10 @@ pub trait BlockChainClient : Sync + Send {
 	fn trace(&self, trace: TraceId) -> Option<LocalizedTrace>;
 
 	/// Returns traces created by transaction.
-	fn transaction_traces(&self, trace: TransactionID) -> Option<Vec<LocalizedTrace>>;
+	fn transaction_traces(&self, trace: TransactionId) -> Option<Vec<LocalizedTrace>>;
 
 	/// Returns traces created by transaction from block.
-	fn block_traces(&self, trace: BlockID) -> Option<Vec<LocalizedTrace>>;
+	fn block_traces(&self, trace: BlockId) -> Option<Vec<LocalizedTrace>>;
 
 	/// Get last hashes starting from best block.
 	fn last_hashes(&self) -> LastHashes;
@@ -208,7 +211,7 @@ pub trait BlockChainClient : Sync + Send {
 		let mut corpus = Vec::new();
 		while corpus.is_empty() {
 			for _ in 0..sample_size {
-				let block_bytes = self.block(BlockID::Hash(h)).expect("h is either the best_block_hash or an ancestor; qed");
+				let block_bytes = self.block(BlockId::Hash(h)).expect("h is either the best_block_hash or an ancestor; qed");
 				let block = BlockView::new(&block_bytes);
 				let header = block.header_view();
 				if header.number() == 0 {
@@ -246,11 +249,11 @@ pub trait BlockChainClient : Sync + Send {
 	/// Set the mode.
 	fn set_mode(&self, mode: Mode);
 
-	/// Returns engine-related extra info for `BlockID`.
-	fn block_extra_info(&self, id: BlockID) -> Option<BTreeMap<String, String>>;
+	/// Returns engine-related extra info for `BlockId`.
+	fn block_extra_info(&self, id: BlockId) -> Option<BTreeMap<String, String>>;
 
-	/// Returns engine-related extra info for `UncleID`.
-	fn uncle_extra_info(&self, id: UncleID) -> Option<BTreeMap<String, String>>;
+	/// Returns engine-related extra info for `UncleId`.
+	fn uncle_extra_info(&self, id: UncleId) -> Option<BTreeMap<String, String>>;
 
 	/// Returns information about pruning/data availability.
 	fn pruning_info(&self) -> PruningInfo;
@@ -285,15 +288,15 @@ pub trait ProvingBlockChainClient: BlockChainClient {
 	/// Returns a vector of raw trie nodes (in order from the root) proving the storage query.
 	/// Nodes after `from_level` may be omitted.
 	/// An empty vector indicates unservable query.
-	fn prove_storage(&self, key1: H256, key2: H256, from_level: u32, id: BlockID) -> Vec<Bytes>;
+	fn prove_storage(&self, key1: H256, key2: H256, from_level: u32, id: BlockId) -> Vec<Bytes>;
 
 	/// Prove account existence at a specific block id.
 	/// The key is the keccak hash of the account's address.
 	/// Returns a vector of raw trie nodes (in order from the root) proving the query.
 	/// Nodes after `from_level` may be omitted.
 	/// An empty vector indicates unservable query.	
-	fn prove_account(&self, key1: H256, from_level: u32, id: BlockID) -> Vec<Bytes>;
+	fn prove_account(&self, key1: H256, from_level: u32, id: BlockId) -> Vec<Bytes>;
 
 	/// Get code by address hash.
-	fn code_by_hash(&self, account_key: H256, id: BlockID) -> Bytes;
+	fn code_by_hash(&self, account_key: H256, id: BlockId) -> Bytes;
 }

ethcore/src/engines/authority_round.rs

@@ -49,6 +49,8 @@ pub struct AuthorityRoundParams {
 	pub authorities: Vec<Address>,
 	/// Number of authorities.
 	pub authority_n: usize,
+	/// Starting step,
+	pub start_step: Option<u64>,
 }
 
 impl From<ethjson::spec::AuthorityRoundParams> for AuthorityRoundParams {
@@ -58,6 +60,7 @@ impl From<ethjson::spec::AuthorityRoundParams> for AuthorityRoundParams {
 			step_duration: Duration::from_secs(p.step_duration.into()),
 			authority_n: p.authorities.len(),
 			authorities: p.authorities.into_iter().map(Into::into).collect::<Vec<_>>(),
+			start_step: p.start_step.map(Into::into),
 		}
 	}
 }
@@ -97,7 +100,7 @@ impl AsMillis for Duration {
 impl AuthorityRound {
 	/// Create a new instance of AuthorityRound engine.
 	pub fn new(params: CommonParams, our_params: AuthorityRoundParams, builtins: BTreeMap<Address, Builtin>) -> Result<Arc<Self>, Error> {
-		let initial_step = (unix_now().as_secs() / our_params.step_duration.as_secs()) as usize;
+		let initial_step = our_params.start_step.unwrap_or_else(|| (unix_now().as_secs() / our_params.step_duration.as_secs())) as usize;
 		let engine = Arc::new(
 			AuthorityRound {
 				params: params,
@@ -160,14 +163,7 @@ impl IoHandler<()> for TransitionHandler {
 	fn timeout(&self, io: &IoContext<()>, timer: TimerToken) {
 		if timer == ENGINE_TIMEOUT_TOKEN {
 			if let Some(engine) = self.engine.upgrade() {
-				engine.step.fetch_add(1, AtomicOrdering::SeqCst);
-				engine.proposed.store(false, AtomicOrdering::SeqCst);
-				if let Some(ref channel) = *engine.message_channel.lock() {
-					match channel.send(ClientIoMessage::UpdateSealing) {
-						Ok(_) => trace!(target: "poa", "timeout: UpdateSealing message sent for step {}.", engine.step.load(AtomicOrdering::Relaxed)),
-						Err(err) => trace!(target: "poa", "timeout: Could not send a sealing message {} for step {}.", err, engine.step.load(AtomicOrdering::Relaxed)),
-					}
-				}
+				engine.step();
 				io.register_timer_once(ENGINE_TIMEOUT_TOKEN, engine.remaining_step_duration().as_millis())
 					.unwrap_or_else(|e| warn!(target: "poa", "Failed to restart consensus step timer: {}.", e))
 			}
@@ -184,6 +180,17 @@ impl Engine for AuthorityRound {
 	fn params(&self) -> &CommonParams { &self.params }
 	fn builtins(&self) -> &BTreeMap<Address, Builtin> { &self.builtins }
 
+	fn step(&self) {
+		self.step.fetch_add(1, AtomicOrdering::SeqCst);
+		self.proposed.store(false, AtomicOrdering::SeqCst);
+		if let Some(ref channel) = *self.message_channel.lock() {
+			match channel.send(ClientIoMessage::UpdateSealing) {
+				Ok(_) => trace!(target: "poa", "timeout: UpdateSealing message sent for step {}.", self.step.load(AtomicOrdering::Relaxed)),
+				Err(err) => trace!(target: "poa", "timeout: Could not send a sealing message {} for step {}.", err, self.step.load(AtomicOrdering::Relaxed)),
+			}
+		}
+	}
+
 	/// Additional engine-specific information for the user/developer concerning `header`.
 	fn extra_info(&self, header: &Header) -> BTreeMap<String, String> {
 		map![
@@ -235,6 +242,8 @@ impl Engine for AuthorityRound {
 			} else {
 				warn!(target: "poa", "generate_seal: FAIL: Accounts not provided.");
 			}
+		} else {
+			trace!(target: "poa", "generate_seal: Not a proposer for step {}.", step);
 		}
 		None
 	}
@@ -338,7 +347,6 @@ mod tests {
 	use tests::helpers::*;
 	use account_provider::AccountProvider;
 	use spec::Spec;
-	use std::time::UNIX_EPOCH;
 
 	#[test]
 	fn has_valid_metadata() {
@@ -433,13 +441,30 @@ mod tests {
 		let engine = Spec::new_test_round().engine;
 
 		let signature = tap.sign(addr, Some("0".into()), header.bare_hash()).unwrap();
-		let time = UNIX_EPOCH.elapsed().unwrap().as_secs();
 		// Two authorities.
-		let mut step =  time - time % 2;
-		header.set_seal(vec![encode(&step).to_vec(), encode(&(&*signature as &[u8])).to_vec()]);
+		// Spec starts with step 2.
+		header.set_seal(vec![encode(&2usize).to_vec(), encode(&(&*signature as &[u8])).to_vec()]);
 		assert!(engine.verify_block_seal(&header).is_err());
-		step = step + 1;
-		header.set_seal(vec![encode(&step).to_vec(), encode(&(&*signature as &[u8])).to_vec()]);
+		header.set_seal(vec![encode(&1usize).to_vec(), encode(&(&*signature as &[u8])).to_vec()]);
 		assert!(engine.verify_block_seal(&header).is_ok());
 	}
+
+	#[test]
+	fn rejects_future_block() {
+		let mut header: Header = Header::default();
+		let tap = AccountProvider::transient_provider();
+		let addr = tap.insert_account("0".sha3(), "0").unwrap();
+
+		header.set_author(addr);
+
+		let engine = Spec::new_test_round().engine;
+
+		let signature = tap.sign(addr, Some("0".into()), header.bare_hash()).unwrap();
+		// Two authorities.
+		// Spec starts with step 2.
+		header.set_seal(vec![encode(&1usize).to_vec(), encode(&(&*signature as &[u8])).to_vec()]);
+		assert!(engine.verify_block_seal(&header).is_ok());
+		header.set_seal(vec![encode(&5usize).to_vec(), encode(&(&*signature as &[u8])).to_vec()]);
+		assert!(engine.verify_block_seal(&header).is_err());
+	}
 }

ethcore/src/engines/mod.rs

@@ -160,4 +160,6 @@ pub trait Engine : Sync + Send {
 
 	/// Add an account provider useful for Engines that sign stuff.
 	fn register_account_provider(&self, _account_provider: Arc<AccountProvider>) {}
+	/// Trigger next step of the consensus engine.
+	fn step(&self) {}
 }

ethcore/src/miner/miner.rs

@@ -23,7 +23,7 @@ use account_provider::{AccountProvider, Error as AccountError};
 use views::{BlockView, HeaderView};
 use header::Header;
 use state::{State, CleanupMode};
-use client::{MiningBlockChainClient, Executive, Executed, EnvInfo, TransactOptions, BlockID, CallAnalytics};
+use client::{MiningBlockChainClient, Executive, Executed, EnvInfo, TransactOptions, BlockId, CallAnalytics, TransactionId};
 use client::TransactionImportResult;
 use executive::contract_address;
 use block::{ClosedBlock, SealedBlock, IsBlock, Block};
@@ -357,6 +357,8 @@ impl Miner {
 		let block_number = open_block.block().fields().header.number();
 
 		// TODO Push new uncles too.
+		let mut tx_count: usize = 0;
+		let tx_total = transactions.len();
 		for tx in transactions {
 			let hash = tx.hash();
 			let start = Instant::now();
@@ -378,7 +380,7 @@ impl Miner {
 				},
 				_ => {},
 			}
-
+			trace!(target: "miner", "Adding tx {:?} took {:?}", hash, took);
 			match result {
 				Err(Error::Execution(ExecutionError::BlockGasLimitReached { gas_limit, gas_used, gas })) => {
 					debug!(target: "miner", "Skipping adding transaction to block because of gas limit: {:?} (limit: {:?}, used: {:?}, gas: {:?})", hash, gas_limit, gas_used, gas);
@@ -407,9 +409,12 @@ impl Miner {
 						   "Error adding transaction to block: number={}. transaction_hash={:?}, Error: {:?}",
 						   block_number, hash, e);
 				},
-				_ => {}	// imported ok
+				_ => {
+					tx_count += 1;
+				}	// imported ok
 			}
 		}
+		trace!(target: "miner", "Pushed {}/{} transactions", tx_count, tx_total);
 
 		let block = open_block.close();
 
@@ -580,6 +585,10 @@ impl Miner {
 		let best_block_header: Header = ::rlp::decode(&chain.best_block_header());
 		transactions.into_iter()
 			.map(|tx| {
+				if chain.transaction_block(TransactionId::Hash(tx.hash())).is_some() {
+					debug!(target: "miner", "Rejected tx {:?}: already in the blockchain", tx.hash());
+					return Err(Error::Transaction(TransactionError::AlreadyImported));
+				}
 				match self.engine.verify_transaction_basic(&tx, &best_block_header) {
 					Err(e) => {
 						debug!(target: "miner", "Rejected tx {:?} with invalid signature: {:?}", tx.hash(), e);
@@ -692,7 +701,7 @@ impl MinerService for Miner {
 				Ok(ret)
 			},
 			None => {
-				chain.call(t, BlockID::Latest, analytics)
+				chain.call(t, BlockId::Latest, analytics)
 			}
 		}
 	}
@@ -1085,7 +1094,7 @@ impl MinerService for Miner {
 
 		fn fetch_transactions(chain: &MiningBlockChainClient, hash: &H256) -> Vec<SignedTransaction> {
 			let block = chain
-				.block(BlockID::Hash(*hash))
+				.block(BlockId::Hash(*hash))
 				// Client should send message after commit to db and inserting to chain.
 				.expect("Expected in-chain blocks.");
 			let block = BlockView::new(&block);

ethcore/src/snapshot/error.rs

@@ -18,7 +18,7 @@
 
 use std::fmt;
 
-use ids::BlockID;
+use ids::BlockId;
 
 use util::H256;
 use util::trie::TrieError;
@@ -28,7 +28,7 @@ use rlp::DecoderError;
 #[derive(Debug)]
 pub enum Error {
 	/// Invalid starting block for snapshot.
-	InvalidStartingBlock(BlockID),
+	InvalidStartingBlock(BlockId),
 	/// Block not found.
 	BlockNotFound(H256),
 	/// Incomplete chain.

ethcore/src/snapshot/mod.rs

@@ -27,7 +27,7 @@ use account_db::{AccountDB, AccountDBMut};
 use blockchain::{BlockChain, BlockProvider};
 use engines::Engine;
 use header::Header;
-use ids::BlockID;
+use ids::BlockId;
 use views::BlockView;
 
 use util::{Bytes, Hashable, HashDB, DBValue, snappy, U256, Uint};
@@ -129,7 +129,7 @@ pub fn take_snapshot<W: SnapshotWriter + Send>(
 	p: &Progress
 ) -> Result<(), Error> {
 	let start_header = try!(chain.block_header(&block_at)
-		.ok_or(Error::InvalidStartingBlock(BlockID::Hash(block_at))));
+		.ok_or(Error::InvalidStartingBlock(BlockId::Hash(block_at))));
 	let state_root = start_header.state_root();
 	let number = start_header.number();
 

ethcore/src/snapshot/service.rs

@@ -30,7 +30,7 @@ use blockchain::BlockChain;
 use client::{BlockChainClient, Client};
 use engines::Engine;
 use error::Error;
-use ids::BlockID;
+use ids::BlockId;
 use service::ClientIoMessage;
 
 use io::IoChannel;
@@ -354,7 +354,7 @@ impl Service {
 		let writer = try!(LooseWriter::new(temp_dir.clone()));
 
 		let guard = Guard::new(temp_dir.clone());
-		let res = client.take_snapshot(writer, BlockID::Number(num), &self.progress);
+		let res = client.take_snapshot(writer, BlockId::Number(num), &self.progress);
 
 		self.taking_snapshot.store(false, Ordering::SeqCst);
 		if let Err(e) = res {

ethcore/src/snapshot/tests/service.rs

@@ -19,7 +19,7 @@
 use std::sync::Arc;
 
 use client::{BlockChainClient, Client};
-use ids::BlockID;
+use ids::BlockId;
 use snapshot::service::{Service, ServiceParams};
 use snapshot::{self, ManifestData, SnapshotService};
 use spec::Spec;
@@ -96,8 +96,8 @@ fn restored_is_equivalent() {
 	assert_eq!(service.status(), ::snapshot::RestorationStatus::Inactive);
 
 	for x in 0..NUM_BLOCKS {
-		let block1 = client.block(BlockID::Number(x as u64)).unwrap();
-		let block2 = client2.block(BlockID::Number(x as u64)).unwrap();
+		let block1 = client.block(BlockId::Number(x as u64)).unwrap();
+		let block2 = client2.block(BlockId::Number(x as u64)).unwrap();
 
 		assert_eq!(block1, block2);
 	}

ethcore/src/snapshot/watcher.rs

@@ -18,7 +18,7 @@
 
 use util::Mutex;
 use client::{BlockChainClient, Client, ChainNotify};
-use ids::BlockID;
+use ids::BlockId;
 use service::ClientIoMessage;
 use views::HeaderView;
 
@@ -43,7 +43,7 @@ impl<F> Oracle for StandardOracle<F>
 	where F: Send + Sync + Fn() -> bool
 {
 	fn to_number(&self, hash: H256) -> Option<u64> {
-		self.client.block_header(BlockID::Hash(hash)).map(|h| HeaderView::new(&h).number())
+		self.client.block_header(BlockId::Hash(hash)).map(|h| HeaderView::new(&h).number())
 	}
 
 	fn is_major_importing(&self) -> bool {

ethcore/src/spec/spec.rs

@@ -273,7 +273,7 @@ impl Spec {
 	pub fn new_instant() -> Spec { load_bundled!("instant_seal") }
 
 	/// Create a new Spec with AuthorityRound consensus which does internal sealing (not requiring work).
-	/// Accounts with secrets "1".sha3() and "2".sha3() are the authorities.
+	/// Accounts with secrets "0".sha3() and "1".sha3() are the authorities.
 	pub fn new_test_round() -> Self { load_bundled!("authority_round") }
 }
 

ethcore/src/state/mod.rs

@@ -31,6 +31,7 @@ use transaction::SignedTransaction;
 use state_db::StateDB;
 
 use util::*;
+
 use util::trie::recorder::{Recorder, BasicRecorder as TrieRecorder};
 
 mod account;

ethcore/src/tests/client.rs

@@ -15,7 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 use io::IoChannel;
-use client::{BlockChainClient, MiningBlockChainClient, Client, ClientConfig, BlockID};
+use client::{BlockChainClient, MiningBlockChainClient, Client, ClientConfig, BlockId};
 use state::CleanupMode;
 use ethereum;
 use block::IsBlock;
@@ -99,7 +99,7 @@ fn imports_good_block() {
 	client.flush_queue();
 	client.import_verified_blocks();
 
-	let block = client.block_header(BlockID::Number(1)).unwrap();
+	let block = client.block_header(BlockId::Number(1)).unwrap();
 	assert!(!block.is_empty());
 }
 
@@ -117,7 +117,7 @@ fn query_none_block() {
 		IoChannel::disconnected(),
 		&db_config
 	).unwrap();
-    let non_existant = client.block_header(BlockID::Number(188));
+    let non_existant = client.block_header(BlockId::Number(188));
 	assert!(non_existant.is_none());
 }
 
@@ -125,7 +125,7 @@ fn query_none_block() {
 fn query_bad_block() {
 	let client_result = get_test_client_with_blocks(vec![get_bad_state_dummy_block()]);
 	let client = client_result.reference();
-	let bad_block:Option<Bytes> = client.block_header(BlockID::Number(1));
+	let bad_block:Option<Bytes> = client.block_header(BlockId::Number(1));
 
 	assert!(bad_block.is_none());
 }
@@ -146,8 +146,8 @@ fn returns_logs() {
 	let client_result = get_test_client_with_blocks(vec![dummy_block.clone()]);
 	let client = client_result.reference();
 	let logs = client.logs(Filter {
-		from_block: BlockID::Earliest,
-		to_block: BlockID::Latest,
+		from_block: BlockId::Earliest,
+		to_block: BlockId::Latest,
 		address: None,
 		topics: vec![],
 		limit: None,
@@ -161,8 +161,8 @@ fn returns_logs_with_limit() {
 	let client_result = get_test_client_with_blocks(vec![dummy_block.clone()]);
 	let client = client_result.reference();
 	let logs = client.logs(Filter {
-		from_block: BlockID::Earliest,
-		to_block: BlockID::Latest,
+		from_block: BlockId::Earliest,
+		to_block: BlockId::Latest,
 		address: None,
 		topics: vec![],
 		limit: Some(2),
@@ -176,7 +176,7 @@ fn returns_block_body() {
 	let client_result = get_test_client_with_blocks(vec![dummy_block.clone()]);
 	let client = client_result.reference();
 	let block = BlockView::new(&dummy_block);
-	let body = client.block_body(BlockID::Hash(block.header().hash())).unwrap();
+	let body = client.block_body(BlockId::Hash(block.header().hash())).unwrap();
 	let body = Rlp::new(&body);
 	assert_eq!(body.item_count(), 2);
 	assert_eq!(body.at(0).as_raw()[..], block.rlp().at(1).as_raw()[..]);
@@ -187,7 +187,7 @@ fn returns_block_body() {
 fn imports_block_sequence() {
 	let client_result = generate_dummy_client(6);
 	let client = client_result.reference();
-	let block = client.block_header(BlockID::Number(5)).unwrap();
+	let block = client.block_header(BlockId::Number(5)).unwrap();
 
 	assert!(!block.is_empty());
 }

ethcore/src/tests/rpc.rs

@@ -19,7 +19,7 @@
 use nanoipc;
 use std::sync::Arc;
 use std::sync::atomic::{Ordering, AtomicBool};
-use client::{Client, BlockChainClient, ClientConfig, BlockID};
+use client::{Client, BlockChainClient, ClientConfig, BlockId};
 use client::remote::RemoteClient;
 use tests::helpers::*;
 use devtools::*;
@@ -71,7 +71,7 @@ fn can_query_block() {
 		run_test_worker(scope, stop_guard.share(), socket_path);
 		let remote_client = nanoipc::generic_client::<RemoteClient<_>>(socket_path).unwrap();
 
-		let non_existant_block = remote_client.block_header(BlockID::Number(999));
+		let non_existant_block = remote_client.block_header(BlockId::Number(999));
 
 		assert!(non_existant_block.is_none());
 	})

ethcore/src/trace/db.rs

@@ -94,7 +94,7 @@ impl Key<blooms::BloomGroup> for TraceGroupPosition {
 }
 
 #[derive(Debug, Hash, Eq, PartialEq)]
-enum CacheID {
+enum CacheId {
 	Trace(H256),
 	Bloom(TraceGroupPosition),
 }
@@ -104,7 +104,7 @@ pub struct TraceDB<T> where T: DatabaseExtras {
 	// cache
 	traces: RwLock<HashMap<H256, FlatBlockTraces>>,
 	blooms: RwLock<HashMap<TraceGroupPosition, blooms::BloomGroup>>,
-	cache_manager: RwLock<CacheManager<CacheID>>,
+	cache_manager: RwLock<CacheManager<CacheId>>,
 	// db
 	tracesdb: Arc<Database>,
 	// config,
@@ -119,7 +119,7 @@ impl<T> BloomGroupDatabase for TraceDB<T> where T: DatabaseExtras {
 	fn blooms_at(&self, position: &GroupPosition) -> Option<BloomGroup> {
 		let position = TraceGroupPosition::from(position.clone());
 		let result = self.tracesdb.read_with_cache(db::COL_TRACE, &self.blooms, &position).map(Into::into);
-		self.note_used(CacheID::Bloom(position));
+		self.note_used(CacheId::Bloom(position));
 		result
 	}
 }
@@ -152,7 +152,7 @@ impl<T> TraceDB<T> where T: DatabaseExtras {
 	}
 
 	/// Let the cache system know that a cacheable item has been used.
-	fn note_used(&self, id: CacheID) {
+	fn note_used(&self, id: CacheId) {
 		let mut cache_manager = self.cache_manager.write();
 		cache_manager.note_used(id);
 	}
@@ -168,8 +168,8 @@ impl<T> TraceDB<T> where T: DatabaseExtras {
 		cache_manager.collect_garbage(current_size, | ids | {
 			for id in &ids {
 				match *id {
-					CacheID::Trace(ref h) => { traces.remove(h); },
-					CacheID::Bloom(ref h) => { blooms.remove(h); },
+					CacheId::Trace(ref h) => { traces.remove(h); },
+					CacheId::Bloom(ref h) => { blooms.remove(h); },
 				}
 			}
 			traces.shrink_to_fit();
@@ -182,7 +182,7 @@ impl<T> TraceDB<T> where T: DatabaseExtras {
 	/// Returns traces for block with hash.
 	fn traces(&self, block_hash: &H256) -> Option<FlatBlockTraces> {
 		let result = self.tracesdb.read_with_cache(db::COL_TRACE, &self.traces, block_hash);
-		self.note_used(CacheID::Trace(block_hash.clone()));
+		self.note_used(CacheId::Trace(block_hash.clone()));
 		result
 	}
 
@@ -289,7 +289,7 @@ impl<T> TraceDatabase for TraceDB<T> where T: DatabaseExtras {
 			batch.extend_with_cache(db::COL_TRACE, &mut *blooms, blooms_to_insert, CacheUpdatePolicy::Remove);
 			// note_used must be called after locking blooms to avoid cache/traces deadlock on garbage collection
 			for key in blooms_keys {
-				self.note_used(CacheID::Bloom(key));
+				self.note_used(CacheId::Bloom(key));
 			}
 		}
 
@@ -300,7 +300,7 @@ impl<T> TraceDatabase for TraceDB<T> where T: DatabaseExtras {
 			// cause this value might be queried by hash later
 			batch.write_with_cache(db::COL_TRACE, &mut *traces, request.block_hash, request.traces, CacheUpdatePolicy::Overwrite);
 			// note_used must be called after locking traces to avoid cache/traces deadlock on garbage collection
-			self.note_used(CacheID::Trace(request.block_hash.clone()));
+			self.note_used(CacheId::Trace(request.block_hash.clone()));
 		}
 	}
 

ethcore/src/types/filter.rs

@@ -18,17 +18,17 @@
 
 use util::{Address, H256, Hashable, H2048};
 use util::bloom::Bloomable;
-use client::BlockID;
+use client::BlockId;
 use log_entry::LogEntry;
 
 /// Blockchain Filter.
 #[derive(Binary, Debug, PartialEq)]
 pub struct Filter {
 	/// Blockchain will be searched from this block.
-	pub from_block: BlockID,
+	pub from_block: BlockId,
 
 	/// Till this block.
-	pub to_block: BlockID,
+	pub to_block: BlockId,
 
 	/// Search addresses.
 	///
@@ -114,14 +114,14 @@ impl Filter {
 mod tests {
 	use util::FixedHash;
 	use filter::Filter;
-	use client::BlockID;
+	use client::BlockId;
 	use log_entry::LogEntry;
 
 	#[test]
 	fn test_bloom_possibilities_none() {
 		let none_filter = Filter {
-			from_block: BlockID::Earliest,
-			to_block: BlockID::Latest,
+			from_block: BlockId::Earliest,
+			to_block: BlockId::Latest,
 			address: None,
 			topics: vec![None, None, None, None],
 			limit: None,
@@ -136,8 +136,8 @@ mod tests {
 	#[test]
 	fn test_bloom_possibilities_single_address_and_topic() {
 		let filter = Filter {
-			from_block: BlockID::Earliest,
-			to_block: BlockID::Latest,
+			from_block: BlockId::Earliest,
+			to_block: BlockId::Latest,
 			address: Some(vec!["b372018f3be9e171df0581136b59d2faf73a7d5d".into()]),
 			topics: vec![
 				Some(vec!["ff74e91598aed6ae5d2fdcf8b24cd2c7be49a0808112a305069355b7160f23f9".into()]),
@@ -155,8 +155,8 @@ mod tests {
 	#[test]
 	fn test_bloom_possibilities_single_address_and_many_topics() {
 		let filter = Filter {
-			from_block: BlockID::Earliest,
-			to_block: BlockID::Latest,
+			from_block: BlockId::Earliest,
+			to_block: BlockId::Latest,
 			address: Some(vec!["b372018f3be9e171df0581136b59d2faf73a7d5d".into()]),
 			topics: vec![
 				Some(vec!["ff74e91598aed6ae5d2fdcf8b24cd2c7be49a0808112a305069355b7160f23f9".into()]),
@@ -174,8 +174,8 @@ mod tests {
 	#[test]
 	fn test_bloom_possibilites_multiple_addresses_and_topics() {
 		let filter = Filter {
-			from_block: BlockID::Earliest,
-			to_block: BlockID::Latest,
+			from_block: BlockId::Earliest,
+			to_block: BlockId::Latest,
 			address: Some(vec![
 						  "b372018f3be9e171df0581136b59d2faf73a7d5d".into(),
 						  "b372018f3be9e171df0581136b59d2faf73a7d5d".into(),
@@ -204,8 +204,8 @@ mod tests {
 	#[test]
 	fn test_filter_matches() {
 		let filter = Filter {
-			from_block: BlockID::Earliest,
-			to_block: BlockID::Latest,
+			from_block: BlockId::Earliest,
+			to_block: BlockId::Latest,
 			address: Some(vec!["b372018f3be9e171df0581136b59d2faf73a7d5d".into()]),
 			topics: vec![
 				Some(vec!["ff74e91598aed6ae5d2fdcf8b24cd2c7be49a0808112a305069355b7160f23f9".into()]),

ethcore/src/types/ids.rs

@@ -21,7 +21,7 @@ use header::BlockNumber;
 
 /// Uniquely identifies block.
 #[derive(Debug, PartialEq, Copy, Clone, Hash, Eq, Binary)]
-pub enum BlockID {
+pub enum BlockId {
 	/// Block's sha3.
 	/// Querying by hash is always faster.
 	Hash(H256),
@@ -37,28 +37,28 @@ pub enum BlockID {
 
 /// Uniquely identifies transaction.
 #[derive(Debug, PartialEq, Clone, Hash, Eq, Binary)]
-pub enum TransactionID {
+pub enum TransactionId {
 	/// Transaction's sha3.
 	Hash(H256),
 	/// Block id and transaction index within this block.
 	/// Querying by block position is always faster.
-	Location(BlockID, usize)
+	Location(BlockId, usize)
 }
 
 /// Uniquely identifies Trace.
 #[derive(Binary)]
 pub struct TraceId {
 	/// Transaction
-	pub transaction: TransactionID,
+	pub transaction: TransactionId,
 	/// Trace address within transaction.
 	pub address: Vec<usize>,
 }
 
 /// Uniquely identifies Uncle.
 #[derive(Debug, PartialEq, Eq, Copy, Clone, Binary)]
-pub struct UncleID {
+pub struct UncleId {
 	/// Block id.
-	pub block: BlockID,
+	pub block: BlockId,
 	/// Position in block.
 	pub position: usize
 }

ethcore/src/types/trace_filter.rs

@@ -18,13 +18,13 @@
 
 use std::ops::Range;
 use util::{Address};
-use types::ids::BlockID;
+use types::ids::BlockId;
 
 /// Easy to use trace filter.
 #[derive(Binary)]
 pub struct Filter {
 	/// Range of filtering.
-	pub range: Range<BlockID>,
+	pub range: Range<BlockId>,
 	/// From address.
 	pub from_address: Vec<Address>,
 	/// To address.

ethstore/src/dir/disk.rs

@@ -19,7 +19,7 @@ use std::path::{PathBuf, Path};
 use std::collections::HashMap;
 use time;
 use {json, SafeAccount, Error};
-use json::UUID;
+use json::Uuid;
 use super::KeyDirectory;
 
 const IGNORED_FILES: &'static [&'static str] = &["thumbs.db", "address_book.json"];
@@ -117,7 +117,7 @@ impl KeyDirectory for DiskDirectory {
 		// build file path
 		let filename = account.filename.as_ref().cloned().unwrap_or_else(|| {
 			let timestamp = time::strftime("%Y-%m-%dT%H-%M-%S", &time::now_utc()).expect("Time-format string is valid.");
-			format!("UTC--{}Z--{}", timestamp, UUID::from(account.id))
+			format!("UTC--{}Z--{}", timestamp, Uuid::from(account.id))
 		});
 
 		// update account filename

ethstore/src/ethstore.rs

@@ -23,8 +23,8 @@ use random::Random;
 use ethkey::{Signature, Address, Message, Secret, Public, KeyPair};
 use dir::KeyDirectory;
 use account::SafeAccount;
-use json::{self, UUID};
 use presale::PresaleWallet;
+use json::{self, Uuid};
 use {import, Error, SimpleSecretStore, SecretStore};
 
 pub struct EthStore {
@@ -111,7 +111,7 @@ impl SecretStore for EthStore {
 		account.public(password)
 	}
 
-	fn uuid(&self, address: &Address) -> Result<UUID, Error> {
+	fn uuid(&self, address: &Address) -> Result<Uuid, Error> {
 		let account = try!(self.get(address));
 		Ok(account.id.into())
 	}

ethstore/src/json/error.rs

@@ -21,7 +21,7 @@ pub enum Error {
 	UnsupportedCipher,
 	InvalidCipherParams,
 	UnsupportedKdf,
-	InvalidUUID,
+	InvalidUuid,
 	UnsupportedVersion,
 	InvalidCiphertext,
 	InvalidH256,
@@ -31,7 +31,7 @@ pub enum Error {
 impl fmt::Display for Error {
 	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
 		match *self {
-			Error::InvalidUUID => write!(f, "Invalid UUID"),
+			Error::InvalidUuid => write!(f, "Invalid Uuid"),
 			Error::UnsupportedVersion => write!(f, "Unsupported version"),
 			Error::UnsupportedKdf => write!(f, "Unsupported kdf"),
 			Error::InvalidCiphertext => write!(f, "Invalid ciphertext"),

ethstore/src/json/id.rs

@@ -23,15 +23,15 @@ use super::Error;
 
 /// Universaly unique identifier.
 #[derive(Debug, PartialEq)]
-pub struct UUID([u8; 16]);
+pub struct Uuid([u8; 16]);
 
-impl From<[u8; 16]> for UUID {
+impl From<[u8; 16]> for Uuid {
 	fn from(uuid: [u8; 16]) -> Self {
-		UUID(uuid)
+		Uuid(uuid)
 	}
 }
 
-impl<'a> Into<String> for &'a UUID {
+impl<'a> Into<String> for &'a Uuid {
 	fn into(self) -> String {
 		let d1 = &self.0[0..4];
 		let d2 = &self.0[4..6];
@@ -42,44 +42,44 @@ impl<'a> Into<String> for &'a UUID {
 	}
 }
 
-impl Into<String> for UUID {
+impl Into<String> for Uuid {
 	fn into(self) -> String {
 		Into::into(&self)
 	}
 }
 
-impl Into<[u8; 16]> for UUID {
+impl Into<[u8; 16]> for Uuid {
 	fn into(self) -> [u8; 16] {
 		self.0
 	}
 }
 
-impl fmt::Display for UUID {
+impl fmt::Display for Uuid {
 	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
-		let s: String = (self as &UUID).into();
+		let s: String = (self as &Uuid).into();
 		write!(f, "{}", s)
 	}
 }
 
 fn copy_into(from: &str, into: &mut [u8]) -> Result<(), Error> {
-	let from = try!(from.from_hex().map_err(|_| Error::InvalidUUID));
+	let from = try!(from.from_hex().map_err(|_| Error::InvalidUuid));
 
 	if from.len() != into.len() {
-		return Err(Error::InvalidUUID);
+		return Err(Error::InvalidUuid);
 	}
 
 	into.copy_from_slice(&from);
 	Ok(())
 }
 
-impl str::FromStr for UUID {
+impl str::FromStr for Uuid {
 	type Err = Error;
 
 	fn from_str(s: &str) -> Result<Self, Self::Err> {
 		let parts: Vec<&str> = s.split("-").collect();
 
 		if parts.len() != 5 {
-			return Err(Error::InvalidUUID);
+			return Err(Error::InvalidUuid);
 		}
 
 		let mut uuid = [0u8; 16];
@@ -90,17 +90,17 @@ impl str::FromStr for UUID {
 		try!(copy_into(parts[3], &mut uuid[8..10]));
 		try!(copy_into(parts[4], &mut uuid[10..16]));
 
-		Ok(UUID(uuid))
+		Ok(Uuid(uuid))
 	}
 }
 
-impl From<&'static str> for UUID {
+impl From<&'static str> for Uuid {
 	fn from(s: &'static str) -> Self {
 		s.parse().expect(&format!("invalid string literal for {}: '{}'", stringify!(Self), s))
 	}
 }
 
-impl Serialize for UUID {
+impl Serialize for Uuid {
 	fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
 	where S: Serializer {
 		let s: String = self.into();
@@ -108,17 +108,17 @@ impl Serialize for UUID {
 	}
 }
 
-impl Deserialize for UUID {
+impl Deserialize for Uuid {
 	fn deserialize<D>(deserializer: &mut D) -> Result<Self, D::Error>
 	where D: Deserializer {
-		deserializer.deserialize(UUIDVisitor)
+		deserializer.deserialize(UuidVisitor)
 	}
 }
 
-struct UUIDVisitor;
+struct UuidVisitor;
 
-impl Visitor for UUIDVisitor {
-	type Value = UUID;
+impl Visitor for UuidVisitor {
+	type Value = Uuid;
 
 	fn visit_str<E>(&mut self, value: &str) -> Result<Self::Value, E> where E: SerdeError {
 		value.parse().map_err(SerdeError::custom)
@@ -131,18 +131,18 @@ impl Visitor for UUIDVisitor {
 
 #[cfg(test)]
 mod tests {
-	use super::UUID;
+	use super::Uuid;
 
 	#[test]
 	fn uuid_from_str() {
-		let uuid: UUID = "3198bc9c-6672-5ab3-d995-4942343ae5b6".into();
-		assert_eq!(uuid, UUID::from([0x31, 0x98, 0xbc, 0x9c, 0x66, 0x72, 0x5a, 0xb3, 0xd9, 0x95, 0x49, 0x42, 0x34, 0x3a, 0xe5, 0xb6]));
+		let uuid: Uuid = "3198bc9c-6672-5ab3-d995-4942343ae5b6".into();
+		assert_eq!(uuid, Uuid::from([0x31, 0x98, 0xbc, 0x9c, 0x66, 0x72, 0x5a, 0xb3, 0xd9, 0x95, 0x49, 0x42, 0x34, 0x3a, 0xe5, 0xb6]));
 	}
 
 	#[test]
 	fn uuid_from_and_to_str() {
 		let from = "3198bc9c-6672-5ab3-d995-4942343ae5b6";
-		let uuid: UUID = from.into();
+		let uuid: Uuid = from.into();
 		let to: String = uuid.into();
 		assert_eq!(from, &to);
 	}

ethstore/src/json/key_file.rs

@@ -18,11 +18,11 @@ use std::io::{Read, Write};
 use serde::{Deserialize, Deserializer, Error};
 use serde::de::{Visitor, MapVisitor};
 use serde_json;
-use super::{UUID, Version, Crypto, H160};
+use super::{Uuid, Version, Crypto, H160};
 
 #[derive(Debug, PartialEq, Serialize)]
 pub struct KeyFile {
-	pub id: UUID,
+	pub id: Uuid,
 	pub version: Version,
 	pub crypto: Crypto,
 	pub address: H160,
@@ -31,7 +31,7 @@ pub struct KeyFile {
 }
 
 enum KeyFileField {
-	ID,
+	Id,
 	Version,
 	Crypto,
 	Address,
@@ -56,7 +56,7 @@ impl Visitor for KeyFileFieldVisitor {
 		where E: Error
 	{
 		match value {
-			"id" => Ok(KeyFileField::ID),
+			"id" => Ok(KeyFileField::Id),
 			"version" => Ok(KeyFileField::Version),
 			"crypto" => Ok(KeyFileField::Crypto),
 			"Crypto" => Ok(KeyFileField::Crypto),
@@ -94,7 +94,7 @@ impl Visitor for KeyFileVisitor {
 
 		loop {
 			match try!(visitor.visit_key()) {
-				Some(KeyFileField::ID) => { id = Some(try!(visitor.visit_value())); }
+				Some(KeyFileField::Id) => { id = Some(try!(visitor.visit_value())); }
 				Some(KeyFileField::Version) => { version = Some(try!(visitor.visit_value())); }
 				Some(KeyFileField::Crypto) => { crypto = Some(try!(visitor.visit_value())); }
 				Some(KeyFileField::Address) => { address = Some(try!(visitor.visit_value())); }
@@ -153,7 +153,7 @@ impl KeyFile {
 mod tests {
 	use std::str::FromStr;
 	use serde_json;
-	use json::{KeyFile, UUID, Version, Crypto, Cipher, Aes128Ctr, Kdf, Scrypt};
+	use json::{KeyFile, Uuid, Version, Crypto, Cipher, Aes128Ctr, Kdf, Scrypt};
 
 	#[test]
 	fn basic_keyfile() {
@@ -183,7 +183,7 @@ mod tests {
 		}"#;
 
 		let expected = KeyFile {
-			id: UUID::from_str("8777d9f6-7860-4b9b-88b7-0b57ee6b3a73").unwrap(),
+			id: Uuid::from_str("8777d9f6-7860-4b9b-88b7-0b57ee6b3a73").unwrap(),
 			version: Version::V3,
 			address: "6edddfc6349aff20bc6467ccf276c5b52487f7a8".into(),
 			crypto: Crypto {

ethstore/src/json/mod.rs.in

@@ -14,7 +14,7 @@ pub use self::cipher::{Cipher, CipherSer, CipherSerParams, Aes128Ctr};
 pub use self::crypto::{Crypto, CipherText};
 pub use self::error::Error;
 pub use self::hash::{H128, H160, H256};
-pub use self::id::UUID;
+pub use self::id::Uuid;
 pub use self::kdf::{Kdf, KdfSer, Prf, Pbkdf2, Scrypt, KdfSerParams};
 pub use self::key_file::KeyFile;
 pub use self::presale::{PresaleWallet, Encseed};

ethstore/src/secret_store.rs

@@ -16,7 +16,7 @@
 
 use ethkey::{Address, Message, Signature, Secret, Public};
 use Error;
-use json::UUID;
+use json::Uuid;
 
 pub trait SimpleSecretStore: Send + Sync {
 	fn insert_account(&self, secret: Secret, password: &str) -> Result<Address, Error>;
@@ -37,7 +37,7 @@ pub trait SecretStore: SimpleSecretStore {
 
 	fn public(&self, account: &Address, password: &str) -> Result<Public, Error>;
 
-	fn uuid(&self, account: &Address) -> Result<UUID, Error>;
+	fn uuid(&self, account: &Address) -> Result<Uuid, Error>;
 	fn name(&self, account: &Address) -> Result<String, Error>;
 	fn meta(&self, account: &Address) -> Result<String, Error>;
 

js/.babelrc

@@ -17,6 +17,15 @@
     },
     "development": {
       "plugins": ["react-hot-loader/babel"]
+    },
+    "test": {
+      "plugins": [
+        [
+          "babel-plugin-webpack-alias", {
+            "config": "webpack/test.js"
+          }
+        ]
+      ]
     }
   }
 }

js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "parity.js",
-  "version": "0.2.102",
+  "version": "0.2.105",
   "main": "release/index.js",
   "jsnext:main": "src/index.js",
   "author": "Parity Team <admin@parity.io>",
@@ -40,9 +40,9 @@
     "coveralls": "npm run testCoverage && coveralls < coverage/lcov.info",
     "lint": "eslint --ignore-path .gitignore ./src/",
     "lint:cached": "eslint --cache --ignore-path .gitignore ./src/",
-    "test": "mocha 'src/**/*.spec.js'",
-    "test:coverage": "istanbul cover _mocha -- 'src/**/*.spec.js'",
-    "test:e2e": "mocha 'src/**/*.e2e.js'",
+    "test": "NODE_ENV=test mocha 'src/**/*.spec.js'",
+    "test:coverage": "NODE_ENV=test istanbul cover _mocha -- 'src/**/*.spec.js'",
+    "test:e2e": "NODE_ENV=test mocha 'src/**/*.e2e.js'",
     "test:npm": "(cd .npmjs && npm i) && node test/npmLibrary && (rm -rf .npmjs/node_modules)",
     "prepush": "npm run lint:cached"
   },
@@ -57,6 +57,7 @@
     "babel-plugin-transform-object-rest-spread": "6.20.2",
     "babel-plugin-transform-react-remove-prop-types": "0.2.11",
     "babel-plugin-transform-runtime": "6.15.0",
+    "babel-plugin-webpack-alias": "2.1.2",
     "babel-polyfill": "6.20.0",
     "babel-preset-es2015": "6.18.0",
     "babel-preset-es2016": "6.16.0",
@@ -66,6 +67,7 @@
     "babel-register": "6.18.0",
     "babel-runtime": "6.20.0",
     "chai": "3.5.0",
+    "chai-as-promised": "6.0.0",
     "chai-enzyme": "0.6.1",
     "circular-dependency-plugin": "2.0.0",
     "copy-webpack-plugin": "4.0.1",
@@ -99,8 +101,8 @@
     "mock-local-storage": "1.0.2",
     "mock-socket": "6.0.3",
     "nock": "9.0.2",
-    "postcss-import": "8.1.0",
-    "postcss-loader": "1.1.1",
+    "postcss-import": "9.0.0",
+    "postcss-loader": "1.2.0",
     "postcss-nested": "1.0.0",
     "postcss-simple-vars": "3.0.0",
     "progress": "1.1.8",
@@ -137,7 +139,7 @@
     "js-sha3": "0.5.5",
     "lodash": "4.17.2",
     "marked": "0.3.6",
-    "material-ui": "0.16.4",
+    "material-ui": "0.16.5",
     "material-ui-chip-input": "0.11.1",
     "mobx": "2.6.4",
     "mobx-react": "4.0.3",

js/src/3rdparty/etherscan/links.js

@@ -14,10 +14,14 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+export const url = (isTestnet = false) => {
+  return `https://${isTestnet ? 'testnet.' : ''}etherscan.io`;
+};
+
 export const txLink = (hash, isTestnet = false) => {
-  return `https://${isTestnet ? 'testnet.' : ''}etherscan.io/tx/${hash}`;
+  return `${url(isTestnet)}/tx/${hash}`;
 };
 
 export const addressLink = (address, isTestnet = false) => {
-  return `https://${isTestnet ? 'testnet.' : ''}etherscan.io/address/${address}`;
+  return `${url(isTestnet)}/address/${address}`;
 };

js/src/api/contract/contract.js

@@ -240,8 +240,8 @@ export default class Contract {
   }
 
   _bindEvent = (event) => {
-    event.subscribe = (options = {}, callback) => {
-      return this._subscribe(event, options, callback);
+    event.subscribe = (options = {}, callback, autoRemove) => {
+      return this._subscribe(event, options, callback, autoRemove);
     };
 
     event.unsubscribe = (subscriptionId) => {
@@ -306,16 +306,31 @@ export default class Contract {
     return this._api.eth.newFilter(options);
   }
 
-  subscribe (eventName = null, options = {}, callback) {
+  subscribe (eventName = null, options = {}, callback, autoRemove) {
     try {
       const event = this._findEvent(eventName);
-      return this._subscribe(event, options, callback);
+      return this._subscribe(event, options, callback, autoRemove);
     } catch (e) {
       return Promise.reject(e);
     }
   }
 
-  _subscribe (event = null, _options, callback) {
+  _sendData (subscriptionId, error, logs) {
+    const { autoRemove, callback } = this._subscriptions[subscriptionId];
+    let result = true;
+
+    try {
+      result = callback(error, logs);
+    } catch (error) {
+      console.warn('_sendData', subscriptionId, error);
+    }
+
+    if (autoRemove && result && typeof result === 'boolean') {
+      this.unsubscribe(subscriptionId);
+    }
+  }
+
+  _subscribe (event = null, _options, callback, autoRemove = false) {
     const subscriptionId = nextSubscriptionId++;
     const { skipInitFetch } = _options;
     delete _options['skipInitFetch'];
@@ -325,6 +340,7 @@ export default class Contract {
       .then((filterId) => {
         this._subscriptions[subscriptionId] = {
           options: _options,
+          autoRemove,
           callback,
           filterId
         };
@@ -337,8 +353,7 @@ export default class Contract {
         return this._api.eth
           .getFilterLogs(filterId)
           .then((logs) => {
-            callback(null, this.parseEventLogs(logs));
-
+            this._sendData(subscriptionId, null, this.parseEventLogs(logs));
             this._subscribeToChanges();
             return subscriptionId;
           });
@@ -437,13 +452,13 @@ export default class Contract {
         })
       )
       .then((logsArray) => {
-        logsArray.forEach((logs, idx) => {
+        logsArray.forEach((logs, subscriptionId) => {
           if (!logs || !logs.length) {
             return;
           }
 
           try {
-            subscriptions[idx].callback(null, this.parseEventLogs(logs));
+            this.sendData(subscriptionId, null, this.parseEventLogs(logs));
           } catch (error) {
             console.error('_sendSubscriptionChanges', error);
           }

js/src/api/subscriptions/manager.js

@@ -59,7 +59,7 @@ export default class Manager {
     return subscription;
   }
 
-  subscribe (subscriptionName, callback) {
+  subscribe (subscriptionName, callback, autoRemove = false) {
     return new Promise((resolve, reject) => {
       const subscription = this._validateType(subscriptionName);
 
@@ -75,6 +75,7 @@ export default class Manager {
       this.subscriptions[subscriptionId] = {
         name: subscriptionName,
         id: subscriptionId,
+        autoRemove,
         callback
       };
 
@@ -101,13 +102,18 @@ export default class Manager {
   }
 
   _sendData (subscriptionId, error, data) {
-    const { callback } = this.subscriptions[subscriptionId];
+    const { autoRemove, callback } = this.subscriptions[subscriptionId];
+    let result = true;
 
     try {
-      callback(error, data);
+      result = callback(error, data);
     } catch (error) {
       console.error(`Unable to update callback for subscriptionId ${subscriptionId}`, error);
     }
+
+    if (autoRemove && result && typeof result === 'boolean') {
+      this.unsubscribe(subscriptionId);
+    }
   }
 
   _updateSubscriptions = (subscriptionName, error, data) => {

js/src/contracts/code/index.js

@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-import wallet from './wallet';
+import { wallet } from './wallet';
 
 export {
   wallet

js/src/contracts/registry.js

@@ -19,7 +19,10 @@ import * as abis from './abi';
 export default class Registry {
   constructor (api) {
     this._api = api;
-    this._contracts = [];
+
+    this._contracts = {};
+    this._pendingContracts = {};
+
     this._instance = null;
     this._fetching = false;
     this._queue = [];
@@ -59,20 +62,25 @@ export default class Registry {
   getContract (_name) {
     const name = _name.toLowerCase();
 
-    return new Promise((resolve, reject) => {
     if (this._contracts[name]) {
-        resolve(this._contracts[name]);
-        return;
+      return Promise.resolve(this._contracts[name]);
     }
 
-      this
+    if (this._pendingContracts[name]) {
+      return this._pendingContracts[name];
+    }
+
+    const promise = this
       .lookupAddress(name)
       .then((address) => {
         this._contracts[name] = this._api.newContract(abis[name], address);
-          resolve(this._contracts[name]);
-        })
-        .catch(reject);
+        delete this._pendingContracts[name];
+        return this._contracts[name];
       });
+
+    this._pendingContracts[name] = promise;
+
+    return promise;
   }
 
   getContractInstance (_name) {
@@ -89,7 +97,7 @@ export default class Registry {
       return instance.getAddress.call({}, [sha3, 'A']);
     })
     .then((address) => {
-      console.log('lookupAddress', name, sha3, address);
+      console.log('[lookupAddress]', `(${sha3}) ${name}: ${address}`);
       return address;
     });
   }

js/src/contracts/snippets/enhanced-wallet.sol

@@ -0,0 +1,460 @@
+//sol Wallet
+// Multi-sig, daily-limited account proxy/wallet.
+// @authors:
+// Gav Wood <g@ethdev.com>
+// inheritable "property" contract that enables methods to be protected by requiring the acquiescence of either a
+// single, or, crucially, each of a number of, designated owners.
+// usage:
+// use modifiers onlyowner (just own owned) or onlymanyowners(hash), whereby the same hash must be provided by
+// some number (specified in constructor) of the set of owners (specified in the constructor, modifiable) before the
+// interior is executed.
+pragma solidity ^0.4.6;
+
+contract multisig {
+    // EVENTS
+
+    // this contract can accept a confirmation, in which case
+    // we record owner and operation (hash) alongside it.
+    event Confirmation(address owner, bytes32 operation);
+    event Revoke(address owner, bytes32 operation);
+
+    // some others are in the case of an owner changing.
+    event OwnerChanged(address oldOwner, address newOwner);
+    event OwnerAdded(address newOwner);
+    event OwnerRemoved(address oldOwner);
+
+    // the last one is emitted if the required signatures change
+    event RequirementChanged(uint newRequirement);
+
+    // Funds has arrived into the wallet (record how much).
+    event Deposit(address _from, uint value);
+    // Single transaction going out of the wallet (record who signed for it, how much, and to whom it's going).
+    event SingleTransact(address owner, uint value, address to, bytes data);
+    // Multi-sig transaction going out of the wallet (record who signed for it last, the operation hash, how much, and to whom it's going).
+    event MultiTransact(address owner, bytes32 operation, uint value, address to, bytes data);
+    // Confirmation still needed for a transaction.
+    event ConfirmationNeeded(bytes32 operation, address initiator, uint value, address to, bytes data);
+}
+
+contract multisigAbi is multisig {
+    function isOwner(address _addr) returns (bool);
+
+    function hasConfirmed(bytes32 _operation, address _owner) constant returns (bool);
+
+    function confirm(bytes32 _h) returns(bool);
+
+    // (re)sets the daily limit. needs many of the owners to confirm. doesn't alter the amount already spent today.
+    function setDailyLimit(uint _newLimit);
+
+    function addOwner(address _owner);
+
+    function removeOwner(address _owner);
+
+    function changeRequirement(uint _newRequired);
+
+    // Revokes a prior confirmation of the given operation
+    function revoke(bytes32 _operation);
+
+    function changeOwner(address _from, address _to);
+
+    function execute(address _to, uint _value, bytes _data) returns(bool);
+}
+
+contract WalletLibrary is multisig {
+    // TYPES
+
+    // struct for the status of a pending operation.
+    struct PendingState {
+        uint yetNeeded;
+        uint ownersDone;
+        uint index;
+    }
+
+    // Transaction structure to remember details of transaction lest it need be saved for a later call.
+    struct Transaction {
+        address to;
+        uint value;
+        bytes data;
+    }
+
+    /******************************
+     ***** MULTI OWNED SECTION ****
+     ******************************/
+
+    // MODIFIERS
+
+    // simple single-sig function modifier.
+    modifier onlyowner {
+        if (isOwner(msg.sender))
+            _;
+    }
+    // multi-sig function modifier: the operation must have an intrinsic hash in order
+    // that later attempts can be realised as the same underlying operation and
+    // thus count as confirmations.
+    modifier onlymanyowners(bytes32 _operation) {
+        if (confirmAndCheck(_operation))
+            _;
+    }
+
+    // METHODS
+
+    // constructor is given number of sigs required to do protected "onlymanyowners" transactions
+    // as well as the selection of addresses capable of confirming them.
+    function initMultiowned(address[] _owners, uint _required) {
+        m_numOwners = _owners.length + 1;
+        m_owners[1] = uint(msg.sender);
+        m_ownerIndex[uint(msg.sender)] = 1;
+        m_required = _required;
+
+        for (uint i = 0; i < _owners.length; ++i)
+        {
+            m_owners[2 + i] = uint(_owners[i]);
+            m_ownerIndex[uint(_owners[i])] = 2 + i;
+        }
+    }
+
+    // Revokes a prior confirmation of the given operation
+    function revoke(bytes32 _operation) {
+        uint ownerIndex = m_ownerIndex[uint(msg.sender)];
+        // make sure they're an owner
+        if (ownerIndex == 0) return;
+        uint ownerIndexBit = 2**ownerIndex;
+        var pending = m_pending[_operation];
+        if (pending.ownersDone & ownerIndexBit > 0) {
+            pending.yetNeeded++;
+            pending.ownersDone -= ownerIndexBit;
+            Revoke(msg.sender, _operation);
+        }
+    }
+
+    // Replaces an owner `_from` with another `_to`.
+    function changeOwner(address _from, address _to) onlymanyowners(sha3(msg.data)) {
+        if (isOwner(_to)) return;
+        uint ownerIndex = m_ownerIndex[uint(_from)];
+        if (ownerIndex == 0) return;
+
+        clearPending();
+        m_owners[ownerIndex] = uint(_to);
+        m_ownerIndex[uint(_from)] = 0;
+        m_ownerIndex[uint(_to)] = ownerIndex;
+        OwnerChanged(_from, _to);
+    }
+
+    function addOwner(address _owner) onlymanyowners(sha3(msg.data)) {
+        if (isOwner(_owner)) return;
+
+        clearPending();
+        if (m_numOwners >= c_maxOwners)
+            reorganizeOwners();
+        if (m_numOwners >= c_maxOwners)
+            return;
+        m_numOwners++;
+        m_owners[m_numOwners] = uint(_owner);
+        m_ownerIndex[uint(_owner)] = m_numOwners;
+        OwnerAdded(_owner);
+    }
+
+    function removeOwner(address _owner) onlymanyowners(sha3(msg.data)) {
+        uint ownerIndex = m_ownerIndex[uint(_owner)];
+        if (ownerIndex == 0) return;
+        if (m_required > m_numOwners - 1) return;
+
+        m_owners[ownerIndex] = 0;
+        m_ownerIndex[uint(_owner)] = 0;
+        clearPending();
+        reorganizeOwners(); //make sure m_numOwner is equal to the number of owners and always points to the optimal free slot
+        OwnerRemoved(_owner);
+    }
+
+    function changeRequirement(uint _newRequired) onlymanyowners(sha3(msg.data)) {
+        if (_newRequired > m_numOwners) return;
+        m_required = _newRequired;
+        clearPending();
+        RequirementChanged(_newRequired);
+    }
+
+    function isOwner(address _addr) returns (bool) {
+        return m_ownerIndex[uint(_addr)] > 0;
+    }
+
+
+    function hasConfirmed(bytes32 _operation, address _owner) constant returns (bool) {
+        var pending = m_pending[_operation];
+        uint ownerIndex = m_ownerIndex[uint(_owner)];
+
+        // make sure they're an owner
+        if (ownerIndex == 0) return false;
+
+        // determine the bit to set for this owner.
+        uint ownerIndexBit = 2**ownerIndex;
+        return !(pending.ownersDone & ownerIndexBit == 0);
+    }
+
+    // INTERNAL METHODS
+
+    function confirmAndCheck(bytes32 _operation) internal returns (bool) {
+        // determine what index the present sender is:
+        uint ownerIndex = m_ownerIndex[uint(msg.sender)];
+        // make sure they're an owner
+        if (ownerIndex == 0) return;
+
+        var pending = m_pending[_operation];
+        // if we're not yet working on this operation, switch over and reset the confirmation status.
+        if (pending.yetNeeded == 0) {
+            // reset count of confirmations needed.
+            pending.yetNeeded = m_required;
+            // reset which owners have confirmed (none) - set our bitmap to 0.
+            pending.ownersDone = 0;
+            pending.index = m_pendingIndex.length++;
+            m_pendingIndex[pending.index] = _operation;
+        }
+        // determine the bit to set for this owner.
+        uint ownerIndexBit = 2**ownerIndex;
+        // make sure we (the message sender) haven't confirmed this operation previously.
+        if (pending.ownersDone & ownerIndexBit == 0) {
+            Confirmation(msg.sender, _operation);
+            // ok - check if count is enough to go ahead.
+            if (pending.yetNeeded <= 1) {
+                // enough confirmations: reset and run interior.
+                delete m_pendingIndex[m_pending[_operation].index];
+                delete m_pending[_operation];
+                return true;
+            }
+            else
+            {
+                // not enough: record that this owner in particular confirmed.
+                pending.yetNeeded--;
+                pending.ownersDone |= ownerIndexBit;
+            }
+        }
+    }
+
+    function reorganizeOwners() private {
+        uint free = 1;
+        while (free < m_numOwners)
+        {
+            while (free < m_numOwners && m_owners[free] != 0) free++;
+            while (m_numOwners > 1 && m_owners[m_numOwners] == 0) m_numOwners--;
+            if (free < m_numOwners && m_owners[m_numOwners] != 0 && m_owners[free] == 0)
+            {
+                m_owners[free] = m_owners[m_numOwners];
+                m_ownerIndex[m_owners[free]] = free;
+                m_owners[m_numOwners] = 0;
+            }
+        }
+    }
+
+    function clearPending() internal {
+        uint length = m_pendingIndex.length;
+        for (uint i = 0; i < length; ++i)
+            if (m_pendingIndex[i] != 0)
+                delete m_pending[m_pendingIndex[i]];
+        delete m_pendingIndex;
+    }
+
+
+    /******************************
+     ****** DAY LIMIT SECTION *****
+     ******************************/
+
+    // MODIFIERS
+
+    // simple modifier for daily limit.
+    modifier limitedDaily(uint _value) {
+        if (underLimit(_value))
+            _;
+    }
+
+    // METHODS
+
+    // constructor - stores initial daily limit and records the present day's index.
+    function initDaylimit(uint _limit) {
+        m_dailyLimit = _limit;
+        m_lastDay = today();
+    }
+    // (re)sets the daily limit. needs many of the owners to confirm. doesn't alter the amount already spent today.
+    function setDailyLimit(uint _newLimit) onlymanyowners(sha3(msg.data)) {
+        m_dailyLimit = _newLimit;
+    }
+    // resets the amount already spent today. needs many of the owners to confirm.
+    function resetSpentToday() onlymanyowners(sha3(msg.data)) {
+        m_spentToday = 0;
+    }
+
+    // INTERNAL METHODS
+
+    // checks to see if there is at least `_value` left from the daily limit today. if there is, subtracts it and
+    // returns true. otherwise just returns false.
+    function underLimit(uint _value) internal onlyowner returns (bool) {
+        // reset the spend limit if we're on a different day to last time.
+        if (today() > m_lastDay) {
+            m_spentToday = 0;
+            m_lastDay = today();
+        }
+        // check to see if there's enough left - if so, subtract and return true.
+        // overflow protection                    // dailyLimit check
+        if (m_spentToday + _value >= m_spentToday && m_spentToday + _value <= m_dailyLimit) {
+            m_spentToday += _value;
+            return true;
+        }
+        return false;
+    }
+
+    // determines today's index.
+    function today() private constant returns (uint) { return now / 1 days; }
+
+
+    /******************************
+     ********* WALLET SECTION *****
+     ******************************/
+
+    // METHODS
+
+    // constructor - just pass on the owner array to the multiowned and
+    // the limit to daylimit
+    function initWallet(address[] _owners, uint _required, uint _daylimit) {
+        initMultiowned(_owners, _required);
+        initDaylimit(_daylimit) ;
+    }
+
+    // kills the contract sending everything to `_to`.
+    function kill(address _to) onlymanyowners(sha3(msg.data)) {
+        suicide(_to);
+    }
+
+    // Outside-visible transact entry point. Executes transaction immediately if below daily spend limit.
+    // If not, goes into multisig process. We provide a hash on return to allow the sender to provide
+    // shortcuts for the other confirmations (allowing them to avoid replicating the _to, _value
+    // and _data arguments). They still get the option of using them if they want, anyways.
+    function execute(address _to, uint _value, bytes _data) onlyowner returns(bool _callValue) {
+        // first, take the opportunity to check that we're under the daily limit.
+        if (underLimit(_value)) {
+            SingleTransact(msg.sender, _value, _to, _data);
+            // yes - just execute the call.
+            _callValue =_to.call.value(_value)(_data);
+        } else {
+            // determine our operation hash.
+            bytes32 _r = sha3(msg.data, block.number);
+            if (!confirm(_r) && m_txs[_r].to == 0) {
+                m_txs[_r].to = _to;
+                m_txs[_r].value = _value;
+                m_txs[_r].data = _data;
+                ConfirmationNeeded(_r, msg.sender, _value, _to, _data);
+            }
+        }
+    }
+
+    // confirm a transaction through just the hash. we use the previous transactions map, m_txs, in order
+    // to determine the body of the transaction from the hash provided.
+    function confirm(bytes32 _h) onlymanyowners(_h) returns (bool) {
+        if (m_txs[_h].to != 0) {
+            m_txs[_h].to.call.value(m_txs[_h].value)(m_txs[_h].data);
+            MultiTransact(msg.sender, _h, m_txs[_h].value, m_txs[_h].to, m_txs[_h].data);
+            delete m_txs[_h];
+            return true;
+        }
+    }
+
+    // INTERNAL METHODS
+
+    function clearWalletPending() internal {
+        uint length = m_pendingIndex.length;
+        for (uint i = 0; i < length; ++i)
+            delete m_txs[m_pendingIndex[i]];
+        clearPending();
+    }
+
+    // FIELDS
+    address constant _walletLibrary = 0xcafecafecafecafecafecafecafecafecafecafe;
+
+    // the number of owners that must confirm the same operation before it is run.
+    uint m_required;
+    // pointer used to find a free slot in m_owners
+    uint m_numOwners;
+
+    uint public m_dailyLimit;
+    uint public m_spentToday;
+    uint public m_lastDay;
+
+    // list of owners
+    uint[256] m_owners;
+    uint constant c_maxOwners = 250;
+
+    // index on the list of owners to allow reverse lookup
+    mapping(uint => uint) m_ownerIndex;
+    // the ongoing operations.
+    mapping(bytes32 => PendingState) m_pending;
+    bytes32[] m_pendingIndex;
+
+    // pending transactions we have at present.
+    mapping (bytes32 => Transaction) m_txs;
+}
+
+
+contract Wallet is multisig {
+
+    // WALLET CONSTRUCTOR
+    //   calls the `initWallet` method of the Library in this context
+    function Wallet(address[] _owners, uint _required, uint _daylimit) {
+        // Signature of the Wallet Library's init function
+        bytes4 sig = bytes4(sha3("initWallet(address[],uint256,uint256)"));
+        address target = _walletLibrary;
+
+        // Compute the size of the call data : arrays has 2
+        // 32bytes for offset and length, plus 32bytes per element ;
+        // plus 2 32bytes for each uint
+        uint argarraysize = (2 + _owners.length);
+        uint argsize = (2 + argarraysize) * 32;
+
+        assembly {
+            // Add the signature first to memory
+            mstore(0x0, sig)
+            // Add the call data, which is at the end of the
+            // code
+            codecopy(0x4,  sub(codesize, argsize), argsize)
+            // Delegate call to the library
+            delegatecall(sub(gas, 10000), target, 0x0, add(argsize, 0x4), 0x0, 0x0)
+        }
+    }
+
+    // METHODS
+
+    // gets called when no other function matches
+    function() payable {
+        // just being sent some cash?
+        if (msg.value > 0)
+            Deposit(msg.sender, msg.value);
+        else if (msg.data.length > 0)
+            _walletLibrary.delegatecall(msg.data);
+    }
+
+    // Gets an owner by 0-indexed position (using numOwners as the count)
+    function getOwner(uint ownerIndex) constant returns (address) {
+        return address(m_owners[ownerIndex + 1]);
+    }
+
+    // As return statement unavailable in fallback, explicit the method here
+
+    function hasConfirmed(bytes32 _operation, address _owner) constant returns (bool) {
+        return _walletLibrary.delegatecall(msg.data);
+    }
+
+    function isOwner(address _addr) returns (bool) {
+        return _walletLibrary.delegatecall(msg.data);
+    }
+
+    // FIELDS
+    address constant _walletLibrary = 0xcafecafecafecafecafecafecafecafecafecafe;
+
+    // the number of owners that must confirm the same operation before it is run.
+    uint public m_required;
+    // pointer used to find a free slot in m_owners
+    uint public m_numOwners;
+
+    uint public m_dailyLimit;
+    uint public m_spentToday;
+    uint public m_lastDay;
+
+    // list of owners
+    uint[256] m_owners;
+}

js/src/dapps/localtx/Application/application.spec.js

@@ -21,7 +21,7 @@ import '../../../environment/tests';
 
 import Application from './application';
 
-describe('localtx/Application', () => {
+describe('dapps/localtx/Application', () => {
   describe('rendering', () => {
     it('renders without crashing', () => {
       const rendered = shallow(<Application />);

js/src/dapps/localtx/Transaction/transaction.spec.js

@@ -29,7 +29,7 @@ Api.api = {
 import BigNumber from 'bignumber.js';
 import { Transaction, LocalTransaction } from './transaction';
 
-describe('localtx/Transaction', () => {
+describe('dapps/localtx/Transaction', () => {
   describe('rendering', () => {
     it('renders without crashing', () => {
       const transaction = {
@@ -51,7 +51,7 @@ describe('localtx/Transaction', () => {
   });
 });
 
-describe('localtx/LocalTransaction', () => {
+describe('dapps/localtx/LocalTransaction', () => {
   describe('rendering', () => {
     it('renders without crashing', () => {
       const rendered = shallow(

js/src/jsonrpc/interfaces/parity.js

@@ -43,7 +43,7 @@ export default {
         },
         uuid: {
           type: String,
-          desc: 'The account UUID, or null if not available/unknown/not applicable.'
+          desc: 'The account Uuid, or null if not available/unknown/not applicable.'
         }
       }
     }
@@ -66,7 +66,7 @@ export default {
         },
         uuid: {
           type: String,
-          desc: 'The account UUID, or null if not available/unknown/not applicable.'
+          desc: 'The account Uuid, or null if not available/unknown/not applicable.'
         }
       }
     }

js/src/jsonrpc/rollup.config.js

@@ -1,12 +0,0 @@
-import babel from 'rollup-plugin-babel';
-
-export default {
-  entry: 'src/index.js',
-  dest: 'release/index.js',
-  format: 'cjs',
-  plugins: [babel({
-    babelrc: false,
-    presets: ['es2015-rollup', 'stage-0'],
-    runtimeHelpers: true
-  })]
-};

js/src/modals/AddAddress/addAddress.js

@@ -19,7 +19,7 @@ import ContentAdd from 'material-ui/svg-icons/content/add';
 import ContentClear from 'material-ui/svg-icons/content/clear';
 
 import { Button, Modal, Form, Input, InputAddress } from '~/ui';
-import { ERRORS, validateAddress, validateName } from '../../util/validation';
+import { ERRORS, validateAddress, validateName } from '~/util/validation';
 
 export default class AddAddress extends Component {
   static contextTypes = {

js/src/modals/AddContract/addContract.js

@@ -21,7 +21,7 @@ import NavigationArrowForward from 'material-ui/svg-icons/navigation/arrow-forwa
 import NavigationArrowBack from 'material-ui/svg-icons/navigation/arrow-back';
 
 import { Button, Modal, Form, Input, InputAddress, RadioButtons } from '~/ui';
-import { ERRORS, validateAbi, validateAddress, validateName } from '../../util/validation';
+import { ERRORS, validateAbi, validateAddress, validateName } from '~/util/validation';
 
 import { eip20, wallet } from '~/contracts/abi';
 

js/src/modals/CreateWallet/WalletType/walletType.js

@@ -17,6 +17,7 @@
 import React, { Component, PropTypes } from 'react';
 
 import { RadioButtons } from '~/ui';
+import { walletSourceURL } from '~/contracts/code/wallet';
 
 // import styles from '../createWallet.css';
 
@@ -46,7 +47,9 @@ export default class WalletType extends Component {
         description: (
           <span>
             <span>Create/Deploy a </span>
-            <a href='https://github.com/ethereum/dapp-bin/blob/master/wallet/wallet.sol' target='_blank'>standard multi-signature </a>
+            <a href={ walletSourceURL } target='_blank'>
+              standard multi-signature
+            </a>
             <span> Wallet</span>
           </span>
         )

js/src/modals/CreateWallet/createWalletStore.js

@@ -16,13 +16,14 @@
 
 import { observable, computed, action, transaction } from 'mobx';
 
-import { validateUint, validateAddress, validateName } from '~/util/validation';
-import { ERROR_CODES } from '~/api/transport/error';
-
 import Contract from '~/api/contract';
+import Contracts from '~/contracts';
+import { ERROR_CODES } from '~/api/transport/error';
 import { wallet as walletAbi } from '~/contracts/abi';
-import { wallet as walletCode } from '~/contracts/code';
+import { wallet as walletCode, walletLibraryRegKey, fullWalletCode } from '~/contracts/code/wallet';
 
+import { validateUint, validateAddress, validateName } from '~/util/validation';
+import { toWei } from '~/api/util/wei';
 import WalletsUtils from '~/util/wallets';
 
 const STEPS = {
@@ -47,7 +48,7 @@ export default class CreateWalletStore {
     address: '',
     owners: [],
     required: 1,
-    daylimit: 0,
+    daylimit: toWei(1),
 
     name: '',
     description: ''
@@ -160,14 +161,25 @@ export default class CreateWalletStore {
 
     const { account, owners, required, daylimit } = this.wallet;
 
+    Contracts
+      .get()
+      .registry
+      .lookupAddress(walletLibraryRegKey)
+      .then((address) => {
+        const walletLibraryAddress = (address || '').replace(/^0x/, '').toLowerCase();
+        const code = walletLibraryAddress.length && !/^0+$/.test(walletLibraryAddress)
+          ? walletCode.replace(/(_)+WalletLibrary(_)+/g, walletLibraryAddress)
+          : fullWalletCode;
+
         const options = {
-      data: walletCode,
+          data: code,
           from: account
         };
 
-    this.api
+        return this.api
           .newContract(walletAbi)
-      .deploy(options, [ owners, required, daylimit ], this.onDeploymentState)
+          .deploy(options, [ owners, required, daylimit ], this.onDeploymentState);
+      })
       .then((address) => {
         this.deployed = true;
         this.wallet.address = address;

js/src/modals/DeployContract/DetailsStep/detailsStep.js

@@ -18,8 +18,8 @@ import React, { Component, PropTypes } from 'react';
 import { MenuItem } from 'material-ui';
 
 import { AddressSelect, Form, Input, Select } from '~/ui';
-import { validateAbi } from '../../../util/validation';
-import { parseAbiType } from '../../../util/abi';
+import { validateAbi } from '~/util/validation';
+import { parseAbiType } from '~/util/abi';
 
 export default class DetailsStep extends Component {
   static contextTypes = {

js/src/modals/DeployContract/ParametersStep/parametersStep.js

@@ -32,7 +32,7 @@
 import React, { Component, PropTypes } from 'react';
 
 import { Form, TypedInput } from '~/ui';
-import { parseAbiType } from '../../../util/abi';
+import { parseAbiType } from '~/util/abi';
 
 import styles from '../deployContract.css';
 

js/src/modals/DeployContract/deployContract.js

@@ -19,7 +19,7 @@ import ActionDoneAll from 'material-ui/svg-icons/action/done-all';
 import ContentClear from 'material-ui/svg-icons/content/clear';
 
 import { BusyStep, CompletedStep, CopyToClipboard, Button, IdentityIcon, Modal, TxHash } from '~/ui';
-import { ERRORS, validateAbi, validateCode, validateName } from '../../util/validation';
+import { ERRORS, validateAbi, validateCode, validateName } from '~/util/validation';
 
 import DetailsStep from './DetailsStep';
 import ParametersStep from './ParametersStep';

js/src/modals/EditMeta/editMeta.js

@@ -19,7 +19,7 @@ import ContentClear from 'material-ui/svg-icons/content/clear';
 import ContentSave from 'material-ui/svg-icons/content/save';
 
 import { Button, Form, Input, InputChip, Modal } from '~/ui';
-import { validateName } from '../../util/validation';
+import { validateName } from '~/util/validation';
 
 export default class EditMeta extends Component {
   static contextTypes = {

js/src/modals/ExecuteContract/DetailsStep/detailsStep.js

@@ -15,13 +15,19 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 import React, { Component, PropTypes } from 'react';
-import { MenuItem } from 'material-ui';
+import { Checkbox, MenuItem } from 'material-ui';
 
 import { AddressSelect, Form, Input, Select, TypedInput } from '~/ui';
 import { parseAbiType } from '~/util/abi';
 
 import styles from '../executeContract.css';
 
+const CHECK_STYLE = {
+  position: 'absolute',
+  top: '38px',
+  left: '1em'
+};
+
 export default class DetailsStep extends Component {
   static propTypes = {
     accounts: PropTypes.object.isRequired,
@@ -31,10 +37,12 @@ export default class DetailsStep extends Component {
     onAmountChange: PropTypes.func.isRequired,
     fromAddress: PropTypes.string,
     fromAddressError: PropTypes.string,
+    gasEdit: PropTypes.bool,
     onFromAddressChange: PropTypes.func.isRequired,
     func: PropTypes.object,
     funcError: PropTypes.string,
     onFuncChange: PropTypes.func,
+    onGasEditClick: PropTypes.func,
     values: PropTypes.array.isRequired,
     valuesError: PropTypes.array.isRequired,
     warning: PropTypes.string,
@@ -42,7 +50,7 @@ export default class DetailsStep extends Component {
   }
 
   render () {
-    const { accounts, amount, amountError, fromAddress, fromAddressError, onFromAddressChange, onAmountChange } = this.props;
+    const { accounts, amount, amountError, fromAddress, fromAddressError, gasEdit, onGasEditClick, onFromAddressChange, onAmountChange } = this.props;
 
     return (
       <Form>
@@ -56,12 +64,23 @@ export default class DetailsStep extends Component {
           onChange={ onFromAddressChange } />
         { this.renderFunctionSelect() }
         { this.renderParameters() }
+        <div className={ styles.columns }>
+          <div>
             <Input
               label='transaction value (in ETH)'
               hint='the amount to send to with the transaction'
               value={ amount }
               error={ amountError }
               onSubmit={ onAmountChange } />
+          </div>
+          <div>
+            <Checkbox
+              checked={ gasEdit }
+              label='edit gas price or value'
+              onCheck={ onGasEditClick }
+              style={ CHECK_STYLE } />
+          </div>
+        </div>
       </Form>
     );
   }

js/src/modals/ExecuteContract/executeContract.css

@@ -42,3 +42,15 @@
   padding: 0.75em;
   text-align: center;
 }
+
+.columns {
+  display: flex;
+  flex-wrap: wrap;
+  position: relative;
+
+  &>div {
+    flex: 0 1 50%;
+    width: 50%;
+    position: relative;
+  }
+}

js/src/modals/ExecuteContract/executeContract.js

@@ -17,19 +17,36 @@
 import React, { Component, PropTypes } from 'react';
 import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
+import { observer } from 'mobx-react';
 import ActionDoneAll from 'material-ui/svg-icons/action/done-all';
 import ContentClear from 'material-ui/svg-icons/content/clear';
+import NavigationArrowBack from 'material-ui/svg-icons/navigation/arrow-back';
+import NavigationArrowForward from 'material-ui/svg-icons/navigation/arrow-forward';
 
-import { BusyStep, CompletedStep, Button, IdentityIcon, Modal, TxHash } from '~/ui';
-import { MAX_GAS_ESTIMATION } from '../../util/constants';
-import { validateAddress, validateUint } from '../../util/validation';
+import { BusyStep, Button, CompletedStep, GasPriceEditor, IdentityIcon, Modal, TxHash } from '~/ui';
+import { MAX_GAS_ESTIMATION } from '~/util/constants';
+import { validateAddress, validateUint } from '~/util/validation';
 import { parseAbiType } from '~/util/abi';
 
 import DetailsStep from './DetailsStep';
 
-import ERRORS from '../Transfer/errors';
 import { ERROR_CODES } from '~/api/transport/error';
 
+const STEP_DETAILS = 0;
+const STEP_BUSY_OR_GAS = 1;
+const STEP_BUSY = 2;
+
+const TITLES = {
+  transfer: 'function details',
+  sending: 'sending',
+  complete: 'complete',
+  gas: 'gas selection',
+  rejected: 'rejected'
+};
+const STAGES_BASIC = [TITLES.transfer, TITLES.sending, TITLES.complete];
+const STAGES_GAS = [TITLES.transfer, TITLES.gas, TITLES.sending, TITLES.complete];
+
+@observer
 class ExecuteContract extends Component {
   static contextTypes = {
     api: PropTypes.object.isRequired,
@@ -46,21 +63,22 @@ class ExecuteContract extends Component {
     onFromAddressChange: PropTypes.func.isRequired
   }
 
+  gasStore = new GasPriceEditor.Store(this.context.api, this.props.gasLimit);
+
   state = {
     amount: '0',
     amountError: null,
+    busyState: null,
     fromAddressError: null,
     func: null,
     funcError: null,
-    gas: null,
-    gasLimitError: null,
+    gasEdit: false,
+    rejected: false,
+    step: STEP_DETAILS,
+    sending: false,
     values: [],
     valuesError: [],
-    step: 0,
-    sending: false,
-    busyState: null,
-    txhash: null,
-    rejected: false
+    txhash: null
   }
 
   componentDidMount () {
@@ -79,15 +97,21 @@ class ExecuteContract extends Component {
   }
 
   render () {
-    const { sending } = this.state;
+    const { sending, step, gasEdit, rejected } = this.state;
+    const steps = gasEdit ? STAGES_GAS : STAGES_BASIC;
+
+    if (rejected) {
+      steps[steps.length - 1] = TITLES.rejected;
+    }
 
     return (
       <Modal
         actions={ this.renderDialogActions() }
-        title='execute function'
         busy={ sending }
-        waiting={ [1] }
-        visible>
+        current={ step }
+        steps={ steps }
+        visible
+        waiting={ gasEdit ? [STEP_BUSY] : [STEP_BUSY_OR_GAS] }>
         { this.renderStep() }
       </Modal>
     );
@@ -95,7 +119,7 @@ class ExecuteContract extends Component {
 
   renderDialogActions () {
     const { onClose, fromAddress } = this.props;
-    const { sending, step, fromAddressError, valuesError } = this.state;
+    const { gasEdit, sending, step, fromAddressError, valuesError } = this.state;
     const hasError = fromAddressError || valuesError.find((error) => error);
 
     const cancelBtn = (
@@ -105,21 +129,44 @@ class ExecuteContract extends Component {
         icon={ <ContentClear /> }
         onClick={ onClose } />
     );
-
-    if (step === 0) {
-      return [
-        cancelBtn,
+    const postBtn = (
       <Button
         key='postTransaction'
         label='post transaction'
         disabled={ !!(sending || hasError) }
         icon={ <IdentityIcon address={ fromAddress } button /> }
         onClick={ this.postTransaction } />
+    );
+    const nextBtn = (
+      <Button
+        key='nextStep'
+        label='next'
+        icon={ <NavigationArrowForward /> }
+        onClick={ this.onNextClick } />
+    );
+    const prevBtn = (
+      <Button
+        key='prevStep'
+        label='prev'
+        icon={ <NavigationArrowBack /> }
+        onClick={ this.onPrevClick } />
+    );
+
+    if (step === STEP_DETAILS) {
+      return [
+        cancelBtn,
+        gasEdit ? nextBtn : postBtn
       ];
-    } else if (step === 1) {
+    } else if (step === (gasEdit ? STEP_BUSY : STEP_BUSY_OR_GAS)) {
       return [
         cancelBtn
       ];
+    } else if (gasEdit && (step === STEP_BUSY_OR_GAS)) {
+      return [
+        cancelBtn,
+        prevBtn,
+        postBtn
+      ];
     }
 
     return [
@@ -133,7 +180,8 @@ class ExecuteContract extends Component {
 
   renderStep () {
     const { onFromAddressChange } = this.props;
-    const { step, busyState, gasLimitError, txhash, rejected } = this.state;
+    const { gasEdit, step, busyState, txhash, rejected } = this.state;
+    const { errorEstimated } = this.gasStore;
 
     if (rejected) {
       return (
@@ -144,23 +192,29 @@ class ExecuteContract extends Component {
       );
     }
 
-    if (step === 0) {
+    if (step === STEP_DETAILS) {
       return (
         <DetailsStep
           { ...this.props }
           { ...this.state }
-          warning={ gasLimitError }
+          warning={ errorEstimated }
           onAmountChange={ this.onAmountChange }
           onFromAddressChange={ onFromAddressChange }
           onFuncChange={ this.onFuncChange }
+          onGasEditClick={ this.onGasEditClick }
           onValueChange={ this.onValueChange } />
       );
-    } else if (step === 1) {
+    } else if (step === (gasEdit ? STEP_BUSY : STEP_BUSY_OR_GAS)) {
       return (
         <BusyStep
           title='The function execution is in progress'
           state={ busyState } />
       );
+    } else if (gasEdit && (step === STEP_BUSY_OR_GAS)) {
+      return (
+        <GasPriceEditor
+          store={ this.gasStore } />
+      );
     }
 
     return (
@@ -171,6 +225,7 @@ class ExecuteContract extends Component {
   }
 
   onAmountChange = (amount) => {
+    this.gasStore.setEthValue(amount);
     this.setState({ amount }, this.estimateGas);
   }
 
@@ -221,7 +276,7 @@ class ExecuteContract extends Component {
 
   estimateGas = (_fromAddress) => {
     const { api } = this.context;
-    const { fromAddress, gasLimit } = this.props;
+    const { fromAddress } = this.props;
     const { amount, func, values } = this.state;
     const options = {
       gas: MAX_GAS_ESTIMATION,
@@ -237,18 +292,11 @@ class ExecuteContract extends Component {
       .estimateGas(options, values)
       .then((gasEst) => {
         const gas = gasEst.mul(1.2);
-        let gasLimitError = null;
 
-        if (gas.gte(MAX_GAS_ESTIMATION)) {
-          gasLimitError = ERRORS.gasException;
-        } else if (gas.gt(gasLimit)) {
-          gasLimitError = ERRORS.gasBlockLimit;
-        }
+        console.log(`estimateGas: received ${gasEst.toFormat(0)}, adjusted to ${gas.toFormat(0)}`);
 
-        this.setState({
-          gas,
-          gasLimitError
-        });
+        this.gasStore.setEstimated(gasEst.toFixed(0));
+        this.gasStore.setGas(gas.toFixed(0));
       })
       .catch((error) => {
         console.warn('estimateGas', error);
@@ -258,22 +306,20 @@ class ExecuteContract extends Component {
   postTransaction = () => {
     const { api, store } = this.context;
     const { fromAddress } = this.props;
-    const { amount, func, values } = this.state;
+    const { amount, func, gasEdit, values } = this.state;
+    const steps = gasEdit ? STAGES_GAS : STAGES_BASIC;
+    const finalstep = steps.length - 1;
     const options = {
-      gas: MAX_GAS_ESTIMATION,
+      gas: this.gasStore.gas,
+      gasPrice: this.gasStore.price,
       from: fromAddress,
       value: api.util.toWei(amount || 0)
     };
 
-    this.setState({ sending: true, step: 1 });
+    this.setState({ sending: true, step: gasEdit ? STEP_BUSY : STEP_BUSY_OR_GAS });
 
     func
-      .estimateGas(options, values)
-      .then((gas) => {
-        options.gas = gas.mul(1.2).toFixed(0);
-        console.log(`estimateGas: received ${gas.toFormat(0)}, adjusted to ${gas.mul(1.2).toFormat(0)}`);
-        return func.postTransaction(options, values);
-      })
+      .postTransaction(options, values)
       .then((requestId) => {
         this.setState({ busyState: 'Waiting for authorization in the Parity Signer' });
 
@@ -281,7 +327,7 @@ class ExecuteContract extends Component {
           .pollMethod('parity_checkRequest', requestId)
           .catch((error) => {
             if (error.code === ERROR_CODES.REQUEST_REJECTED) {
-              this.setState({ rejected: true });
+              this.setState({ rejected: true, step: finalstep });
               return false;
             }
 
@@ -289,13 +335,31 @@ class ExecuteContract extends Component {
           });
       })
       .then((txhash) => {
-        this.setState({ sending: false, step: 2, txhash, busyState: 'Your transaction has been posted to the network' });
+        this.setState({ sending: false, step: finalstep, txhash, busyState: 'Your transaction has been posted to the network' });
       })
       .catch((error) => {
         console.error('postTransaction', error);
         store.dispatch({ type: 'newError', error });
       });
   }
+
+  onGasEditClick = () => {
+    this.setState({
+      gasEdit: !this.state.gasEdit
+    });
+  }
+
+  onNextClick = () => {
+    this.setState({
+      step: this.state.step + 1
+    });
+  }
+
+  onPrevClick = () => {
+    this.setState({
+      step: this.state.step - 1
+    });
+  }
 }
 
 function mapStateToProps (state) {

js/src/modals/SMSVerification/store.js

@@ -21,9 +21,8 @@ import { sha3 } from '~/api/util/sha3';
 import Contracts from '~/contracts';
 
 import { checkIfVerified, checkIfRequested, awaitPuzzle } from '~/contracts/sms-verification';
-import { postToServer } from '../../3rdparty/sms-verification';
-import checkIfTxFailed from '../../util/check-if-tx-failed';
-import waitForConfirmations from '../../util/wait-for-block-confirmations';
+import { postToServer } from '~/3rdparty/sms-verification';
+import { checkIfTxFailed, waitForConfirmations } from '~/util/tx';
 
 export const LOADING = 'fetching-contract';
 export const QUERY_DATA = 'query-data';

js/src/modals/SaveContract/saveContract.js

@@ -20,7 +20,7 @@ import SaveIcon from 'material-ui/svg-icons/content/save';
 import ContentClear from 'material-ui/svg-icons/content/clear';
 
 import { Button, Modal, Editor, Form, Input } from '~/ui';
-import { ERRORS, validateName } from '../../util/validation';
+import { ERRORS, validateName } from '~/util/validation';
 
 import styles from './saveContract.css';
 

js/src/modals/Shapeshift/shapeshift.js

@@ -19,7 +19,7 @@ import ActionDoneAll from 'material-ui/svg-icons/action/done-all';
 import ContentClear from 'material-ui/svg-icons/content/clear';
 
 import { Button, IdentityIcon, Modal } from '~/ui';
-import initShapeshift from '../../3rdparty/shapeshift';
+import initShapeshift from '~/3rdparty/shapeshift';
 import shapeshiftLogo from '../../../assets/images/shapeshift-logo.png';
 
 import AwaitingDepositStep from './AwaitingDepositStep';

js/src/modals/Transfer/Extras/extras.js

@@ -16,96 +16,28 @@
 
 import React, { Component, PropTypes } from 'react';
 
-import Form, { Input } from '~/ui/Form';
-import GasPriceSelector from '../GasPriceSelector';
-
-import styles from '../transfer.css';
+import { GasPriceEditor, Form, Input } from '~/ui';
 
 export default class Extras extends Component {
   static propTypes = {
     isEth: PropTypes.bool,
     data: PropTypes.string,
     dataError: PropTypes.string,
-    gas: PropTypes.string,
-    gasEst: PropTypes.string,
-    gasError: PropTypes.string,
-    gasPrice: PropTypes.oneOfType([
-      PropTypes.string,
-      PropTypes.object
-    ]),
-    gasPriceDefault: PropTypes.string,
-    gasPriceError: PropTypes.string,
-    gasPriceHistogram: PropTypes.object,
     total: PropTypes.string,
     totalError: PropTypes.string,
-    onChange: PropTypes.func.isRequired
+    onChange: PropTypes.func.isRequired,
+    gasStore: PropTypes.object.isRequired
   }
 
   render () {
-    const { gas, gasPrice, gasError, gasEst, gasPriceDefault, gasPriceError, gasPriceHistogram, total, totalError } = this.props;
-
-    const gasLabel = `gas amount (estimated: ${gasEst})`;
-    const priceLabel = `gas price (current: ${gasPriceDefault})`;
+    const { gasStore, onChange } = this.props;
 
     return (
       <Form>
-
         { this.renderData() }
-
-        <div className={ styles.columns }>
-          <div style={ { flex: 65 } }>
-            <GasPriceSelector
-              gasPriceHistogram={ gasPriceHistogram }
-              gasPrice={ gasPrice }
-              onChange={ this.onEditGasPrice }
-            />
-          </div>
-
-          <div
-            className={ styles.row }
-            style={ {
-              flex: 35, paddingLeft: '1rem',
-              justifyContent: 'space-around',
-              paddingBottom: 12
-            } }
-          >
-            <div className={ styles.row }>
-              <Input
-                label={ gasLabel }
-                hint='the amount of gas to use for the transaction'
-                error={ gasError }
-                value={ gas }
-                onChange={ this.onEditGas } />
-
-              <Input
-                label={ priceLabel }
-                hint='the price of gas to use for the transaction'
-                error={ gasPriceError }
-                value={ (gasPrice || '').toString() }
-                onChange={ this.onEditGasPrice } />
-            </div>
-
-            <div className={ styles.row }>
-              <Input
-                disabled
-                label='total transaction amount'
-                hint='the total amount of the transaction'
-                error={ totalError }
-                value={ `${total} ETH` } />
-            </div>
-          </div>
-        </div>
-
-        <div>
-          <p className={ styles.gasPriceDesc }>
-            You can choose the gas price based on the
-            distribution of recent included transactions' gas prices.
-            The lower the gas price is, the cheaper the transaction will
-            be. The higher the gas price is, the faster it should
-            get mined by the network.
-          </p>
-        </div>
-
+        <GasPriceEditor
+          store={ gasStore }
+          onChange={ onChange } />
       </Form>
     );
   }
@@ -129,14 +61,6 @@ export default class Extras extends Component {
     );
   }
 
-  onEditGas = (event) => {
-    this.props.onChange('gas', event.target.value);
-  }
-
-  onEditGasPrice = (event, value) => {
-    this.props.onChange('gasPrice', value);
-  }
-
   onEditData = (event) => {
     this.props.onChange('data', event.target.value);
   }

js/src/modals/Transfer/store.js

@@ -23,7 +23,8 @@ import { bytesToHex } from '~/api/util/format';
 import Contract from '~/api/contract';
 import ERRORS from './errors';
 import { ERROR_CODES } from '~/api/transport/error';
-import { DEFAULT_GAS, DEFAULT_GASPRICE, MAX_GAS_ESTIMATION } from '~/util/constants';
+import { DEFAULT_GAS, MAX_GAS_ESTIMATION } from '~/util/constants';
+import GasPriceStore from '~/ui/GasPriceEditor/store';
 
 const TITLES = {
   transfer: 'transfer details',
@@ -48,14 +49,6 @@ export default class TransferStore {
   @observable data = '';
   @observable dataError = null;
 
-  @observable gas = DEFAULT_GAS;
-  @observable gasError = null;
-
-  @observable gasEst = '0';
-  @observable gasLimitError = null;
-  @observable gasPrice = DEFAULT_GASPRICE;
-  @observable gasPriceError = null;
-
   @observable recipient = '';
   @observable recipientError = ERRORS.requireRecipient;
 
@@ -68,11 +61,8 @@ export default class TransferStore {
   @observable value = '0.0';
   @observable valueError = null;
 
-  gasPriceHistogram = {};
-
   account = null;
   balance = null;
-  gasLimit = null;
   onClose = null;
 
   senders = null;
@@ -81,6 +71,8 @@ export default class TransferStore {
   isWallet = false;
   wallet = null;
 
+  gasStore = null;
+
   @computed get steps () {
     const steps = [].concat(this.extras ? STAGES_EXTRA : STAGES_BASIC);
 
@@ -93,7 +85,7 @@ export default class TransferStore {
 
   @computed get isValid () {
     const detailsValid = !this.recipientError && !this.valueError && !this.totalError && !this.senderError;
-    const extrasValid = !this.gasError && !this.gasPriceError && !this.totalError;
+    const extrasValid = !this.gasStore.errorGas && !this.gasStore.errorPrice && !this.totalError;
     const verifyValid = !this.passwordError;
 
     switch (this.stage) {
@@ -115,14 +107,14 @@ export default class TransferStore {
   constructor (api, props) {
     this.api = api;
 
-    const { account, balance, gasLimit, senders, onClose, newError, sendersBalances } = props;
+    const { account, balance, gasLimit, senders, newError, sendersBalances } = props;
     this.account = account;
     this.balance = balance;
-    this.gasLimit = gasLimit;
-    this.onClose = onClose;
     this.isWallet = account && account.wallet;
     this.newError = newError;
 
+    this.gasStore = new GasPriceStore(api, gasLimit);
+
     if (this.isWallet) {
       this.wallet = props.wallet;
       this.walletContract = new Contract(this.api, walletAbi);
@@ -143,8 +135,7 @@ export default class TransferStore {
     this.stage -= 1;
   }
 
-  @action onClose = () => {
-    this.onClose && this.onClose();
+  @action handleClose = () => {
     this.stage = 0;
   }
 
@@ -179,26 +170,6 @@ export default class TransferStore {
     }
   }
 
-  @action getDefaults = () => {
-    Promise
-      .all([
-        this.api.parity.gasPriceHistogram(),
-        this.api.eth.gasPrice()
-      ])
-      .then(([gasPriceHistogram, gasPrice]) => {
-        transaction(() => {
-          this.gasPrice = gasPrice.toString();
-          this.gasPriceDefault = gasPrice.toFormat();
-          this.gasPriceHistogram = gasPriceHistogram;
-
-          this.recalculate();
-        });
-      })
-      .catch((error) => {
-        console.warn('getDefaults', error);
-      });
-  }
-
   @action onSend = () => {
     this.onNext();
     this.sending = true;
@@ -281,25 +252,11 @@ export default class TransferStore {
   }
 
   @action _onUpdateGas = (gas) => {
-    const gasError = this._validatePositiveNumber(gas);
-
-    transaction(() => {
-      this.gas = gas;
-      this.gasError = gasError;
-
     this.recalculate();
-    });
   }
 
   @action _onUpdateGasPrice = (gasPrice) => {
-    const gasPriceError = this._validatePositiveNumber(gasPrice);
-
-    transaction(() => {
-      this.gasPrice = gasPrice;
-      this.gasPriceError = gasPriceError;
-
     this.recalculate();
-    });
   }
 
   @action _onUpdateRecipient = (recipient) => {
@@ -362,7 +319,7 @@ export default class TransferStore {
 
   @action recalculateGas = () => {
     if (!this.isValid) {
-      this.gas = 0;
+      this.gasStore.setGas('0');
       return this.recalculate();
     }
 
@@ -370,28 +327,20 @@ export default class TransferStore {
       .estimateGas()
       .then((gasEst) => {
         let gas = gasEst;
-        let gasLimitError = null;
 
         if (gas.gt(DEFAULT_GAS)) {
           gas = gas.mul(1.2);
         }
 
-        if (gas.gte(MAX_GAS_ESTIMATION)) {
-          gasLimitError = ERRORS.gasException;
-        } else if (gas.gt(this.gasLimit)) {
-          gasLimitError = ERRORS.gasBlockLimit;
-        }
-
         transaction(() => {
-          this.gas = gas.toFixed(0);
-          this.gasEst = gasEst.toFormat();
-          this.gasLimitError = gasLimitError;
+          this.gasStore.setEstimated(gasEst.toFixed(0));
+          this.gasStore.setGas(gas.toFixed(0));
 
           this.recalculate();
         });
       })
       .catch((error) => {
-        console.error('etimateGas', error);
+        console.warn('etimateGas', error);
         this.recalculate();
       });
   }
@@ -411,9 +360,9 @@ export default class TransferStore {
       return;
     }
 
-    const { gas, gasPrice, tag, valueAll, isEth, isWallet } = this;
+    const { tag, valueAll, isEth, isWallet } = this;
 
-    const gasTotal = new BigNumber(gasPrice || 0).mul(new BigNumber(gas || 0));
+    const gasTotal = new BigNumber(this.gasStore.price || 0).mul(new BigNumber(this.gasStore.gas || 0));
 
     const availableEth = new BigNumber(balance.tokens[0].value);
 
@@ -453,10 +402,12 @@ export default class TransferStore {
     }
 
     transaction(() => {
-      this.total = this.api.util.fromWei(totalEth).toString();
+      this.total = this.api.util.fromWei(totalEth).toFixed();
       this.totalError = totalError;
       this.value = value;
       this.valueError = valueError;
+      this.gasStore.setErrorTotal(totalError);
+      this.gasStore.setEthValue(totalEth);
     });
   }
 
@@ -522,8 +473,8 @@ export default class TransferStore {
     };
 
     if (!gas) {
-      options.gas = this.gas;
-      options.gasPrice = this.gasPrice;
+      options.gas = this.gasStore.gas;
+      options.gasPrice = this.gasStore.price;
     } else {
       options.gas = MAX_GAS_ESTIMATION;
     }

js/src/modals/Transfer/transfer.css

@@ -144,15 +144,6 @@
   font-size: 1.2rem;
 }
 
-.chart {
-  position: absolute;
-  width: 100%;
-}
-
-.gasPriceDesc {
-  font-size: 0.9em;
-}
-
 .warning {
   border-radius: 0.5em;
   background: #f80;

js/src/modals/Transfer/transfer.js

@@ -56,10 +56,6 @@ class Transfer extends Component {
 
   store = new TransferStore(this.context.api, this.props);
 
-  componentDidMount () {
-    this.store.getDefaults();
-  }
-
   render () {
     const { stage, extras, steps } = this.store;
 
@@ -186,27 +182,20 @@ class Transfer extends Component {
   }
 
   renderExtrasPage () {
-    if (!this.store.gasPriceHistogram) {
+    if (!this.store.gasStore.histogram) {
       return null;
     }
 
-    const { isEth, data, dataError, gas, gasEst, gasError, gasPrice } = this.store;
-    const { gasPriceDefault, gasPriceError, gasPriceHistogram, total, totalError } = this.store;
+    const { isEth, data, dataError, total, totalError } = this.store;
 
     return (
       <Extras
         isEth={ isEth }
         data={ data }
         dataError={ dataError }
-        gas={ gas }
-        gasEst={ gasEst }
-        gasError={ gasError }
-        gasPrice={ gasPrice }
-        gasPriceDefault={ gasPriceDefault }
-        gasPriceError={ gasPriceError }
-        gasPriceHistogram={ gasPriceHistogram }
         total={ total }
         totalError={ totalError }
+        gasStore={ this.store.gasStore }
         onChange={ this.store.onUpdateDetails } />
     );
   }
@@ -219,7 +208,7 @@ class Transfer extends Component {
       <Button
         icon={ <ContentClear /> }
         label='Cancel'
-        onClick={ this.store.onClose } />
+        onClick={ this.handleClose } />
     );
     const nextBtn = (
       <Button
@@ -245,7 +234,7 @@ class Transfer extends Component {
       <Button
         icon={ <ActionDoneAll /> }
         label='Close'
-        onClick={ this.store.onClose } />
+        onClick={ this.handleClose } />
     );
 
     switch (stage) {
@@ -263,18 +252,25 @@ class Transfer extends Component {
   }
 
   renderWarning () {
-    const { gasLimitError } = this.store;
+    const { errorEstimated } = this.store.gasStore;
 
-    if (!gasLimitError) {
+    if (!errorEstimated) {
       return null;
     }
 
     return (
       <div className={ styles.warning }>
-        { gasLimitError }
+        { errorEstimated }
       </div>
     );
   }
+
+  handleClose = () => {
+    const { onClose } = this.props;
+
+    this.store.handleClose();
+    typeof onClose === 'function' && onClose();
+  }
 }
 
 function mapStateToProps (initState, initProps) {

js/src/redux/providers/personal.js

@@ -36,9 +36,6 @@ export default class Personal {
         }
 
         this._store.dispatch(personalAccountsInfo(accountsInfo));
-      })
-      .then((subscriptionId) => {
-        console.log('personal._subscribeAccountsInfo', 'subscriptionId', subscriptionId);
       });
   }
 

js/src/redux/providers/signer.js

@@ -34,9 +34,6 @@ export default class Signer {
         }
 
         this._store.dispatch(signerRequestsToConfirm(pending || []));
-      })
-      .then((subscriptionId) => {
-        console.log('signer._subscribeRequestsToConfirm', 'subscriptionId', subscriptionId);
       });
   }
 }

js/src/redux/providers/status.js

@@ -59,9 +59,6 @@ export default class Status {
           .catch((error) => {
             console.warn('status._subscribeBlockNumber', 'getBlockByNumber', error);
           });
-      })
-      .then((subscriptionId) => {
-        console.log('status._subscribeBlockNumber', 'subscriptionId', subscriptionId);
       });
   }
 

js/src/redux/providers/walletActions.js

@@ -17,12 +17,10 @@
 import { isEqual, uniq } from 'lodash';
 
 import Contract from '~/api/contract';
-import { wallet as WALLET_ABI } from '~/contracts/abi';
 import { bytesToHex, toHex } from '~/api/util/format';
-
 import { ERROR_CODES } from '~/api/transport/error';
-import { MAX_GAS_ESTIMATION } from '../../util/constants';
-
+import { wallet as WALLET_ABI } from '~/contracts/abi';
+import { MAX_GAS_ESTIMATION } from '~/util/constants';
 import WalletsUtils from '~/util/wallets';
 
 import { newError } from '~/ui/Errors/actions';

js/src/ui/Actionbar/actionbar.spec.js

@@ -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/>.
+
+import React from 'react';
+import { shallow } from 'enzyme';
+
+import Actionbar from './actionbar';
+
+function renderShallow (props) {
+  return shallow(
+    <Actionbar { ...props } />
+  );
+}
+
+describe('ui/Actionbar', () => {
+  describe('rendering', () => {
+    it('renders defaults', () => {
+      expect(renderShallow()).to.be.ok;
+    });
+
+    it('renders with the specified className', () => {
+      expect(renderShallow({ className: 'testClass' })).to.have.className('testClass');
+    });
+  });
+});

js/src/ui/Badge/badge.spec.js

@@ -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/>.
+
+import React from 'react';
+import { shallow } from 'enzyme';
+
+import Badge from './badge';
+
+function renderShallow (props) {
+  return shallow(
+    <Badge { ...props } />
+  );
+}
+
+describe('ui/Badge', () => {
+  describe('rendering', () => {
+    it('renders defaults', () => {
+      expect(renderShallow()).to.be.ok;
+    });
+
+    it('renders with the specified className', () => {
+      expect(renderShallow({ className: 'testClass' })).to.have.className('testClass');
+    });
+  });
+});

js/src/ui/Button/button.js

@@ -17,16 +17,15 @@
 import React, { Component, PropTypes } from 'react';
 import { FlatButton } from 'material-ui';
 
+import { nodeOrStringProptype } from '~/util/proptypes';
+
 export default class Button extends Component {
   static propTypes = {
     backgroundColor: PropTypes.string,
     className: PropTypes.string,
     disabled: PropTypes.bool,
     icon: PropTypes.node,
-    label: PropTypes.oneOfType([
-      React.PropTypes.string,
-      React.PropTypes.object
-    ]),
+    label: nodeOrStringProptype(),
     onClick: PropTypes.func,
     primary: PropTypes.bool
   }

js/src/ui/Button/button.spec.js

@@ -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/>.
+
+import React from 'react';
+import { shallow } from 'enzyme';
+
+import Button from './button';
+
+function renderShallow (props) {
+  return shallow(
+    <Button { ...props } />
+  );
+}
+
+describe('ui/Button', () => {
+  describe('rendering', () => {
+    it('renders defaults', () => {
+      expect(renderShallow()).to.be.ok;
+    });
+
+    it('renders with the specified className', () => {
+      expect(renderShallow({ className: 'testClass' })).to.have.className('testClass');
+    });
+  });
+});

js/src/ui/Container/Title/title.js

@@ -27,10 +27,6 @@ export default class Title extends Component {
     byline: nodeOrStringProptype()
   }
 
-  state = {
-    name: 'Unnamed'
-  }
-
   render () {
     const { className, title, byline } = this.props;
 

js/src/ui/Container/Title/title.spec.js

@@ -0,0 +1,52 @@
+// 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/>.
+
+import React from 'react';
+import { mount, shallow } from 'enzyme';
+
+import Title from './title';
+
+function renderShallow (props) {
+  return shallow(
+    <Title { ...props } />
+  );
+}
+
+function renderMount (props) {
+  return mount(
+    <Title { ...props } />
+  );
+}
+
+describe('ui/Container/Title', () => {
+  describe('rendering', () => {
+    it('renders defaults', () => {
+      expect(renderShallow()).to.be.ok;
+    });
+
+    it('renders with the specified className', () => {
+      expect(renderShallow({ className: 'testClass' })).to.have.className('testClass');
+    });
+
+    it('renders the specified title', () => {
+      expect(renderMount({ title: 'titleText' })).to.contain.text('titleText');
+    });
+
+    it('renders the specified byline', () => {
+      expect(renderMount({ byline: 'bylineText' })).to.contain.text('bylineText');
+    });
+  });
+});

js/src/ui/Container/container.spec.js

@@ -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/>.
+
+import React from 'react';
+import { shallow } from 'enzyme';
+
+import Container from './container';
+
+function renderShallow (props) {
+  return shallow(
+    <Container { ...props } />
+  );
+}
+
+describe('ui/Container', () => {
+  describe('rendering', () => {
+    it('renders defaults', () => {
+      expect(renderShallow()).to.be.ok;
+    });
+
+    it('renders with the specified className', () => {
+      expect(renderShallow({ className: 'testClass' })).to.have.className('testClass');
+    });
+  });
+});

js/src/ui/Form/Input/input.js

@@ -113,32 +113,38 @@ export default class Input extends Component {
         <TextField
           autoComplete='off'
           className={ className }
-          style={ textFieldStyle }
-
-          readOnly={ readOnly }
-
           errorText={ error }
+
           floatingLabelFixed
           floatingLabelText={ label }
-          fullWidth
+
           hintText={ hint }
+          id={ NAME_ID }
+          inputStyle={ inputStyle }
+          fullWidth
+
+          max={ max }
+          min={ min }
+
           multiLine={ multiLine }
           name={ NAME_ID }
-          id={ NAME_ID }
-          rows={ rows }
-          type={ type || 'text' }
-          underlineDisabledStyle={ UNDERLINE_DISABLED }
-          underlineStyle={ readOnly ? UNDERLINE_READONLY : UNDERLINE_NORMAL }
-          underlineFocusStyle={ readOnly ? { display: 'none' } : null }
-          underlineShow={ !hideUnderline }
-          value={ value }
+
           onBlur={ this.onBlur }
           onChange={ this.onChange }
           onKeyDown={ this.onKeyDown }
           onPaste={ this.onPaste }
-          inputStyle={ inputStyle }
-          min={ min }
-          max={ max }
+
+          readOnly={ readOnly }
+          rows={ rows }
+          style={ textFieldStyle }
+          type={ type || 'text' }
+
+          underlineDisabledStyle={ UNDERLINE_DISABLED }
+          underlineStyle={ readOnly ? UNDERLINE_READONLY : UNDERLINE_NORMAL }
+          underlineFocusStyle={ readOnly ? { display: 'none' } : null }
+          underlineShow={ !hideUnderline }
+
+          value={ value }
         >
           { children }
         </TextField>

js/src/ui/Form/TypedInput/typedInput.js

@@ -22,12 +22,11 @@ import IconButton from 'material-ui/IconButton';
 import AddIcon from 'material-ui/svg-icons/content/add';
 import RemoveIcon from 'material-ui/svg-icons/content/remove';
 
+import { fromWei, toWei } from '~/api/util/wei';
 import Input from '~/ui/Form/Input';
 import InputAddressSelect from '~/ui/Form/InputAddressSelect';
 import Select from '~/ui/Form/Select';
-
 import { ABI_TYPES } from '~/util/abi';
-import { fromWei, toWei } from '~/api/util/wei';
 
 import styles from './typedInput.css';
 
@@ -54,13 +53,13 @@ export default class TypedInput extends Component {
   };
 
   state = {
-    isEth: true,
+    isEth: false,
     ethValue: 0
   };
 
-  componentDidMount () {
+  componentWillMount () {
     if (this.props.isEth && this.props.value) {
-      this.setState({ ethValue: fromWei(this.props.value) });
+      this.setState({ isEth: true, ethValue: fromWei(this.props.value) });
     }
   }
 
@@ -165,28 +164,32 @@ export default class TypedInput extends Component {
     }
 
     if (type === ABI_TYPES.INT) {
-      return this.renderNumber();
+      return this.renderEth();
     }
 
     if (type === ABI_TYPES.FIXED) {
-      return this.renderNumber();
+      return this.renderFloat();
     }
 
     return this.renderDefault();
   }
 
   renderEth () {
-    const { ethValue } = this.state;
+    const { ethValue, isEth } = this.state;
 
     const value = ethValue && typeof ethValue.toNumber === 'function'
       ? ethValue.toNumber()
       : ethValue;
 
+    const input = isEth
+      ? this.renderFloat(value, this.onEthValueChange)
+      : this.renderInteger(value, this.onEthValueChange);
+
     return (
       <div className={ styles.ethInput }>
         <div className={ styles.input }>
-          { this.renderNumber(value, this.onEthValueChange) }
-          { this.state.isEth ? (<div className={ styles.label }>ETH</div>) : null }
+          { input }
+          { isEth ? (<div className={ styles.label }>ETH</div>) : null }
         </div>
         <div className={ styles.toggle }>
           <Toggle
@@ -199,8 +202,9 @@ export default class TypedInput extends Component {
     );
   }
 
-  renderNumber (value = this.props.value, onChange = this.onChange) {
+  renderInteger (value = this.props.value, onChange = this.onChange) {
     const { label, error, param, hint, min, max } = this.props;
+
     const realValue = value && typeof value.toNumber === 'function'
       ? value.toNumber()
       : value;
@@ -213,6 +217,35 @@ export default class TypedInput extends Component {
         error={ error }
         onChange={ onChange }
         type='number'
+        step={ 1 }
+        min={ min !== null ? min : (param.signed ? null : 0) }
+        max={ max !== null ? max : null }
+      />
+    );
+  }
+
+  /**
+   * Decimal numbers have to be input via text field
+   * because of some react issues with input number fields.
+   * Once the issue is fixed, this could be a number again.
+   *
+   * @see https://github.com/facebook/react/issues/1549
+   */
+  renderFloat (value = this.props.value, onChange = this.onChange) {
+    const { label, error, param, hint, min, max } = this.props;
+
+    const realValue = value && typeof value.toNumber === 'function'
+      ? value.toNumber()
+      : value;
+
+    return (
+      <Input
+        label={ label }
+        hint={ hint }
+        value={ realValue }
+        error={ error }
+        onChange={ onChange }
+        type='text'
         min={ min !== null ? min : (param.signed ? null : 0) }
         max={ max !== null ? max : null }
       />

js/src/ui/GasPriceEditor/GasPriceSelector/gasPriceSelector.css

@@ -15,3 +15,13 @@
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+.chart {
+  position: absolute;
+  width: 100%;
+}
+
+.columns {
+  display: flex;
+  flex-wrap: wrap;
+  position: relative;
+}

js/src/ui/GasPriceEditor/GasPriceSelector/gasPriceSelector.js

@@ -29,10 +29,7 @@ import {
 import Slider from 'material-ui/Slider';
 import BigNumber from 'bignumber.js';
 
-import componentStyles from './gasPriceSelector.css';
-import mainStyles from '../transfer.css';
-
-const styles = Object.assign({}, mainStyles, componentStyles);
+import styles from './gasPriceSelector.css';
 
 const COLORS = {
   default: 'rgba(255, 99, 132, 0.2)',
@@ -194,10 +191,7 @@ class CustomizedShape extends Component {
 
 class CustomTooltip extends Component {
   static propTypes = {
-    gasPriceHistogram: PropTypes.shape({
-      bucketBounds: PropTypes.array.isRequired,
-      counts: PropTypes.array.isRequired
-    }).isRequired,
+    gasPriceHistogram: PropTypes.object.isRequired,
     type: PropTypes.string,
     payload: PropTypes.array,
     label: PropTypes.number,
@@ -231,12 +225,16 @@ class CustomTooltip extends Component {
   }
 }
 
+const TOOL_STYLE = {
+  color: 'rgba(255,255,255,0.5)',
+  backgroundColor: 'rgba(0, 0, 0, 0.75)',
+  padding: '0 0.5em',
+  fontSize: '0.75em'
+};
+
 export default class GasPriceSelector extends Component {
   static propTypes = {
-    gasPriceHistogram: PropTypes.shape({
-      bucketBounds: PropTypes.array.isRequired,
-      counts: PropTypes.array.isRequired
-    }).isRequired,
+    gasPriceHistogram: PropTypes.object.isRequired,
     onChange: PropTypes.func.isRequired,
 
     gasPrice: PropTypes.oneOfType([
@@ -287,7 +285,8 @@ export default class GasPriceSelector extends Component {
   renderSlider () {
     const { sliderValue } = this.state;
 
-    return (<div className={ styles.columns }>
+    return (
+      <div className={ styles.columns }>
         <Slider
           min={ 0 }
           max={ 1 }
@@ -301,7 +300,8 @@ export default class GasPriceSelector extends Component {
             marginBottom: 12
           } }
         />
-    </div>);
+      </div>
+    );
   }
 
   renderChart () {
@@ -316,7 +316,8 @@ export default class GasPriceSelector extends Component {
     const countIndex = Math.max(0, Math.min(selectedIndex, gasPriceHistogram.counts.length - 1));
     const selectedCount = countModifier(gasPriceHistogram.counts[countIndex]);
 
-    return (<div className={ styles.columns }>
+    return (
+      <div className={ styles.columns }>
         <div style={ { flex: 1, height } }>
           <div className={ styles.chart }>
             <ResponsiveContainer
@@ -370,11 +371,7 @@ export default class GasPriceSelector extends Component {
                 />
 
                 <Tooltip
-                wrapperStyle={ {
-                  backgroundColor: 'rgba(0, 0, 0, 0.75)',
-                  padding: '0 0.5em',
-                  fontSize: '0.9em'
-                } }
+                  wrapperStyle={ TOOL_STYLE }
                   cursor={ this.renderCustomCursor() }
                   content={ <CustomTooltip gasPriceHistogram={ gasPriceHistogram } /> }
                 />
@@ -394,7 +391,8 @@ export default class GasPriceSelector extends Component {
             </ResponsiveContainer>
           </div>
         </div>
-    </div>);
+      </div>
+    );
   }
 
   renderCustomCursor = () => {

js/src/ui/GasPriceEditor/gasPriceEditor.css

@@ -14,11 +14,36 @@
 /* You should have received a copy of the GNU General Public License
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
-.signer {
+
+.columns {
+  display: flex;
+  flex-wrap: wrap;
+  position: relative;
 }
 
-.container {
+.graphColumn {
+  flex: 65;
 }
 
-.mainContainer {
+.editColumn {
+  flex: 35;
+  padding-left: 1em;
+  justify-ontent: space-around;
+  padding-bottom: 12;
+  display: flex;
+  flex-wrap: wrap;
+  position: relative;
+  flex-direction: column;
+}
+
+.gasPriceDesc {
+  font-size: 0.75em;
+  opacity: 0.5;
+}
+
+.row {
+  display: flex;
+  flex-wrap: wrap;
+  position: relative;
+  flex-direction: column;
 }

js/src/ui/GasPriceEditor/gasPriceEditor.js

@@ -0,0 +1,108 @@
+// 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/>.
+
+import BigNumber from 'bignumber.js';
+import React, { Component, PropTypes } from 'react';
+import { observer } from 'mobx-react';
+
+import Input from '../Form/Input';
+import GasPriceSelector from './GasPriceSelector';
+import Store from './store';
+
+import styles from './gasPriceEditor.css';
+
+@observer
+export default class GasPriceEditor extends Component {
+  static contextTypes = {
+    api: PropTypes.object.isRequired
+  };
+
+  static propTypes = {
+    store: PropTypes.object.isRequired,
+    onChange: PropTypes.func
+  }
+
+  static Store = Store;
+
+  render () {
+    const { api } = this.context;
+    const { store } = this.props;
+    const { estimated, priceDefault, price, gas, histogram, errorGas, errorPrice, errorTotal, totalValue } = store;
+
+    const eth = api.util.fromWei(totalValue).toFormat();
+    const gasLabel = `gas (estimated: ${new BigNumber(estimated).toFormat()})`;
+    const priceLabel = `price (current: ${new BigNumber(priceDefault).toFormat()})`;
+
+    return (
+      <div className={ styles.columns }>
+        <div className={ styles.graphColumn }>
+          <GasPriceSelector
+            gasPriceHistogram={ histogram }
+            gasPrice={ price }
+            onChange={ this.onEditGasPrice } />
+          <div className={ styles.gasPriceDesc }>
+            You can choose the gas price based on the
+            distribution of recent included transaction gas prices.
+            The lower the gas price is, the cheaper the transaction will
+            be. The higher the gas price is, the faster it should
+            get mined by the network.
+          </div>
+        </div>
+
+        <div className={ styles.editColumn }>
+          <div className={ styles.row }>
+            <Input
+              label={ gasLabel }
+              hint='the amount of gas to use for the transaction'
+              error={ errorGas }
+              value={ gas }
+              onChange={ this.onEditGas } />
+
+            <Input
+              label={ priceLabel }
+              hint='the price of gas to use for the transaction'
+              error={ errorPrice }
+              value={ price }
+              onChange={ this.onEditGasPrice } />
+          </div>
+
+          <div className={ styles.row }>
+            <Input
+              disabled
+              label='total transaction amount'
+              hint='the total amount of the transaction'
+              error={ errorTotal }
+              value={ `${eth} ETH` } />
+          </div>
+        </div>
+      </div>
+    );
+  }
+
+  onEditGas = (event, gas) => {
+    const { store, onChange } = this.props;
+
+    store.setGas(gas);
+    onChange && onChange('gas', gas);
+  }
+
+  onEditGasPrice = (event, price) => {
+    const { store, onChange } = this.props;
+
+    store.setPrice(price);
+    onChange && onChange('gasPrice', price);
+  }
+}

js/src/ui/GasPriceEditor/index.js

@@ -14,6 +14,4 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-export default (chain) => {
-  return chain === 'morden' || chain === 'ropsten' || chain === 'testnet';
-};
+export default from './gasPriceEditor';

js/src/ui/GasPriceEditor/store.js

@@ -0,0 +1,123 @@
+// 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/>.
+
+import BigNumber from 'bignumber.js';
+import { action, computed, observable, transaction } from 'mobx';
+
+import { ERRORS, validatePositiveNumber } from '~/util/validation';
+import { DEFAULT_GAS, DEFAULT_GASPRICE, MAX_GAS_ESTIMATION } from '~/util/constants';
+
+export default class GasPriceEditor {
+  @observable errorEstimated = null;
+  @observable errorGas = null;
+  @observable errorPrice = null;
+  @observable errorTotal = null;
+  @observable estimated = DEFAULT_GAS;
+  @observable histogram = null;
+  @observable price = DEFAULT_GASPRICE;
+  @observable priceDefault = DEFAULT_GASPRICE;
+  @observable gas = DEFAULT_GAS;
+  @observable gasLimit = 0;
+  @observable weiValue = '0';
+
+  constructor (api, gasLimit, loadDefaults = true) {
+    this._api = api;
+    this.gasLimit = gasLimit;
+
+    if (loadDefaults) {
+      this.loadDefaults();
+    }
+  }
+
+  @computed get totalValue () {
+    try {
+      return new BigNumber(this.gas).mul(this.price).add(this.weiValue);
+    } catch (error) {
+      return new BigNumber(0);
+    }
+  }
+
+  @action setErrorTotal = (errorTotal) => {
+    this.errorTotal = errorTotal;
+  }
+
+  @action setEstimated = (estimated) => {
+    transaction(() => {
+      const bn = new BigNumber(estimated);
+
+      this.estimated = estimated;
+
+      if (bn.gte(MAX_GAS_ESTIMATION)) {
+        this.errorEstimated = ERRORS.gasException;
+      } else if (bn.gte(this.gasLimit)) {
+        this.errorEstimated = ERRORS.gasBlockLimit;
+      } else {
+        this.errorEstimated = null;
+      }
+    });
+  }
+
+  @action setEthValue = (weiValue) => {
+    this.weiValue = weiValue;
+  }
+
+  @action setHistogram = (gasHistogram) => {
+    this.histogram = gasHistogram;
+  }
+
+  @action setPrice = (price) => {
+    transaction(() => {
+      this.errorPrice = validatePositiveNumber(price).numberError;
+      this.price = price;
+    });
+  }
+
+  @action setGas = (gas) => {
+    transaction(() => {
+      const { numberError } = validatePositiveNumber(gas);
+      const bn = new BigNumber(gas);
+
+      this.gas = gas;
+
+      if (numberError) {
+        this.errorGas = numberError;
+      } else if (bn.gte(this.gasLimit)) {
+        this.errorGas = ERRORS.gasBlockLimit;
+      } else {
+        this.errorGas = null;
+      }
+    });
+  }
+
+  @action loadDefaults () {
+    Promise
+      .all([
+        this._api.parity.gasPriceHistogram(),
+        this._api.eth.gasPrice()
+      ])
+      .then(([gasPriceHistogram, gasPrice]) => {
+        transaction(() => {
+          this.setPrice(gasPrice.toFixed(0));
+          this.setHistogram(gasPriceHistogram);
+
+          this.priceDefault = gasPrice.toFixed();
+        });
+      })
+      .catch((error) => {
+        console.warn('getDefaults', error);
+      });
+  }
+}

js/src/ui/IdentityName/identityName.spec.js

@@ -0,0 +1,76 @@
+// 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/>.
+
+import React from 'react';
+import { mount } from 'enzyme';
+import sinon from 'sinon';
+
+import IdentityName from './identityName';
+
+const ADDR_A = '0x123456789abcdef0123456789A';
+const ADDR_B = '0x123456789abcdef0123456789B';
+const ADDR_C = '0x123456789abcdef0123456789C';
+const STORE = {
+  dispatch: sinon.stub(),
+  subscribe: sinon.stub(),
+  getState: () => {
+    return {
+      balances: {
+        tokens: {}
+      },
+      personal: {
+        accountsInfo: {
+          [ADDR_A]: { name: 'testing' },
+          [ADDR_B]: {}
+        }
+      }
+    };
+  }
+};
+
+function render (props) {
+  return mount(
+    <IdentityName
+      store={ STORE }
+      { ...props } />
+  );
+}
+
+describe('ui/IdentityName', () => {
+  describe('rendering', () => {
+    it('renders defaults', () => {
+      expect(render()).to.be.ok;
+    });
+
+    describe('account not found', () => {
+      it('renders null with empty', () => {
+        expect(render({ address: ADDR_C, empty: true }).html()).to.be.null;
+      });
+
+      it('renders address without empty', () => {
+        expect(render({ address: ADDR_C }).text()).to.equal(ADDR_C);
+      });
+
+      it('renders short address with shorten', () => {
+        expect(render({ address: ADDR_C, shorten: true }).text()).to.equal('123456…56789c');
+      });
+
+      it('renders unknown with flag', () => {
+        expect(render({ address: ADDR_C, unknown: true }).text()).to.equal('UNNAMED');
+      });
+    });
+  });
+});

js/src/ui/Page/page.css

@@ -17,8 +17,8 @@
 
 .layout {
   padding: 0.25em 0.25em 1em 0.25em;
-}
 
-.layout>div {
-  padding-bottom: 0.75em;
+  > * {
+    margin-bottom: 0.75em;
+  }
 }