Merge remote-tracking branch 'origin/master' into check-updates

.gitlab-ci.yml

@@ -423,12 +423,8 @@ test-rust-stable:
   before_script:
     - git submodule update --init --recursive
     - export RUST_FILES_MODIFIED=$(git --no-pager diff --name-only $CI_BUILD_REF^ $CI_BUILD_REF | grep -v ^js/ | wc -l)
-    - export JS_FILES_MODIFIED=$(git --no-pager diff --name-only $CI_BUILD_REF^ $CI_BUILD_REF | grep ^js/ | wc -l)
-    - echo "rust/js modified: $RUST_FILES_MODIFIED / $JS_FILES_MODIFIED"
-    - if [ "$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
-    - if [ "$JS_FILES_MODIFIED" = 0 ]; then echo "Skipping JS lint since no JS files modified."; else ./js/scripts/lint.sh && ./js/scripts/test.sh && ./js/scripts/build.sh; fi
     - if [ "$RUST_FILES_MODIFIED" = 0 ]; then echo "Skipping Rust tests since no Rust files modified."; else ./test.sh $CARGOFLAGS; fi
   tags:
     - rust
@@ -439,11 +435,8 @@ js-test:
   before_script:
     - git submodule update --init --recursive
     - export JS_FILES_MODIFIED=$(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 "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 "Skipping JS lint since no JS files modified."; else ./js/scripts/lint.sh && ./js/scripts/test.sh && ./js/scripts/build.sh; fi
   tags:
     - rust

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",
@@ -458,6 +459,21 @@ 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"
@@ -668,6 +684,7 @@ dependencies = [
  "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",

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"
+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/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;
+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 util::{Bytes, Mutex, RwLock, U256};
-use time::SteadyTime;
+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
+// minimum interval between updates.
-const PROTOCOL_VERSION: u32 = 1;
+const UPDATE_INTERVAL_MS: i64 = 5000;
 
-// TODO [rob] make configurable.
+// Supported protocol versions.
-const PROTOCOL_ID: [u8; 3] = *b"les";
+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) { }
+	fn on_connect(&self, _ctx: &EventContext, _status: &Status, _capabilities: &Capabilities) { }
-	/// Called when a peer disconnects
+	/// Called when a peer disconnects, with a list of unfulfilled request IDs as
-	fn on_disconnect(&self, _id: PeerId) { }
+	/// 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();
+			match peer.remote_flow.as_mut() {
-			peer.remote_flow.max_amount(&peer.remote_buffer, kind)
+				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();
+		match peer.remote_flow.as_mut() {
-
+			Some(&mut (ref mut buf, ref flow)) => {
-		let max = peer.remote_flow.compute_cost(request.kind(), request.amount());
+				flow.recharge(buf);
-		try!(peer.remote_buffer.deduct_cost(max));
+				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)) {
+			io.send(*peer_id, packet::ANNOUNCE, status::write_announcement(&announcement));
-				debug!(target: "les", "Error sending to peer {}: {}", peer_id, e);
-			}
 		}
 	}
 
 	/// 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) {
+	fn on_disconnect(&self, peer: PeerId, io: &IoContext) {
-		// TODO: reassign all requests assigned to this peer.
+		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> {
+	fn send_status(&self, peer: PeerId, io: &IoContext) -> Result<PendingPeer, Error> {
-		let chain_info = self.provider.chain_info();
+		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 => {
@@ -366,63 +557,80 @@ 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();
 
-		let peer_info = match peers.get(peer) {
+		// scope to ensure locks are dropped before moving into handler-space.
-			Some(info) => info,
-			None => return Ok(()),
-		};
-
-		let mut peer_info = peer_info.lock();
-
-		// update status.
 		{
-			// TODO: punish peer if they've moved backwards.
+			let peers = self.peers.read();
-			let status = &mut peer_info.status;
+			let peer_info = match peers.get(peer) {
-			let last_head = status.head_hash;
+				Some(info) => info,
-			status.head_hash = announcement.head_hash;
+				None => return Ok(()),
-			status.head_td = announcement.head_td;
+			};
-			status.head_num = announcement.head_num;
+
-			status.last_head = Some((last_head, announcement.reorg_depth));
+			let mut peer_info = peer_info.lock();
+
+			// update status.
+			{
+				// TODO: punish peer if they've moved backwards.
+				let status = &mut peer_info.status;
+				let last_head = status.head_hash;
+				status.head_hash = announcement.head_hash;
+				status.head_td = announcement.head_td;
+				status.head_num = announcement.head_num;
+				status.last_head = Some((last_head, announcement.reorg_depth));
+			}
+
+			// update capabilities.
+			peer_info.capabilities.update_from(&announcement);
 		}
 
-		// 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> {
+	fn block_headers(&self, peer: &PeerId, io: &IoContext, raw: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+		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> {
+	fn block_bodies(&self, peer: &PeerId, io: &IoContext, raw: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+		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> {
+	fn receipts(&self, peer: &PeerId, io: &IoContext, raw: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+		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> {
+	fn proofs(&self, peer: &PeerId, io: &IoContext, raw: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+		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> {
+	fn contract_code(&self, peer: &PeerId, io: &IoContext, raw: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+		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> {
+	fn header_proofs(&self, peer: &PeerId, io: &IoContext, raw: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+		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);
+		self.handle_packet(io, peer, packet_id, 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)
-				}
-			}
-		}
 	}
 
 	fn connected(&self, io: &NetworkContext, peer: &PeerId) {
 		self.on_connect(peer, io);
 	}
 
-	fn disconnected(&self, _io: &NetworkContext, peer: &PeerId) {
+	fn disconnected(&self, io: &NetworkContext, peer: &PeerId) {
-		self.on_disconnect(*peer);
+		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)
+		network_id: try!(parser.expect(Key::NetworkId)),
-			.and_then(|id: u32| NetworkId::from_raw(id).ok_or(DecoderError::Custom("Invalid network ID")))),
 		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(
+	let flow_params = match (
-		try!(parser.expect(Key::BufferLimit)),
+		parser.expect(Key::BufferLimit),
-		try!(parser.expect(Key::BufferCostTable)),
+		parser.expect(Key::BufferCostTable),
-		try!(parser.expect(Key::BufferRechargeRate)),
+		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));
 	}
 
-	pairs.push(encode_pair(Key::BufferLimit, flow_params.limit()));
+	if let Some(flow_params) = flow_params {
-	pairs.push(encode_pair(Key::BufferCostTable, flow_params.cost_table()));
+		pairs.push(encode_pair(Key::BufferLimit, flow_params.limit()));
-	pairs.push(encode_pair(Key::BufferRechargeRate, flow_params.recharge_rate()));
+		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

@@ -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.
@@ -105,8 +109,8 @@ impl<T: ProvingBlockChainClient + ?Sized> Provider for T {
 		}
 
 		(0u64..req.max as u64)
-			.map(|x: u64| x.saturating_mul(req.skip))
+			.map(|x: u64| x.saturating_mul(req.skip + 1))
-			.take_while(|x| if req.reverse { x < &start_num } else { best_num - start_num < *x })
+			.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)))
 			.take_while(|x| x.is_some())

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/src/client/client.rs

@@ -54,7 +54,7 @@ use blockchain::{BlockChain, BlockProvider, TreeRoute, ImportRoute};
 use client::{
 	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;
@@ -1461,7 +1461,7 @@ impl MayPanic for Client {
 	}
 }
 
-impl ProvingBlockChainClient for Client {
+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())

ethcore/src/client/mod.rs

@@ -31,7 +31,9 @@ pub use self::config::{Mode, ClientConfig, UpdatePolicy, UpdateFilter, DatabaseC
 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

@@ -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,

ethcore/src/engines/authority_round.rs

@@ -347,7 +347,6 @@ mod tests {
 	use tests::helpers::*;
 	use account_provider::AccountProvider;
 	use spec::Spec;
-	use std::time::UNIX_EPOCH;
 
 	#[test]
 	fn has_valid_metadata() {
@@ -442,13 +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;
+		// Spec starts with step 2.
-		header.set_seal(vec![encode(&step).to_vec(), encode(&(&*signature as &[u8])).to_vec()]);
+		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(&1usize).to_vec(), encode(&(&*signature as &[u8])).to_vec()]);
-		header.set_seal(vec![encode(&step).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/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;

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

@@ -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": "NODE_ENV=test mocha 'src/**/*.spec.js'",
-    "test:coverage": "istanbul cover _mocha -- 'src/**/*.spec.js'",
+    "test:coverage": "NODE_ENV=test istanbul cover _mocha -- 'src/**/*.spec.js'",
-    "test:e2e": "mocha 'src/**/*.e2e.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-import": "9.0.0",
-    "postcss-loader": "1.1.1",
+    "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/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]) {
-      if (this._contracts[name]) {
+      return Promise.resolve(this._contracts[name]);
-        resolve(this._contracts[name]);
+    }
-        return;
-      }
 
-      this
+    if (this._pendingContracts[name]) {
-        .lookupAddress(name)
+      return this._pendingContracts[name];
-        .then((address) => {
+    }
-          this._contracts[name] = this._api.newContract(abis[name], address);
+
-          resolve(this._contracts[name]);
+    const promise = this
-        })
+      .lookupAddress(name)
-        .catch(reject);
+      .then((address) => {
-    });
+        this._contracts[name] = this._api.newContract(abis[name], address);
+        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/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/modals/CreateWallet/createWalletStore.js

@@ -23,6 +23,7 @@ import { wallet as walletAbi } from '~/contracts/abi';
 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: ''

js/src/modals/Transfer/store.js

@@ -107,10 +107,9 @@ 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.onClose = onClose;
     this.isWallet = account && account.wallet;
     this.newError = newError;
 
@@ -136,8 +135,7 @@ export default class TransferStore {
     this.stage -= 1;
   }
 
-  @action onClose = () => {
+  @action handleClose = () => {
-    this.onClose && this.onClose();
     this.stage = 0;
   }
 

js/src/modals/Transfer/transfer.js

@@ -208,7 +208,7 @@ class Transfer extends Component {
       <Button
         icon={ <ContentClear /> }
         label='Cancel'
-        onClick={ this.store.onClose } />
+        onClick={ this.handleClose } />
     );
     const nextBtn = (
       <Button
@@ -234,7 +234,7 @@ class Transfer extends Component {
       <Button
         icon={ <ActionDoneAll /> }
         label='Close'
-        onClick={ this.store.onClose } />
+        onClick={ this.handleClose } />
     );
 
     switch (stage) {
@@ -264,6 +264,13 @@ class Transfer extends Component {
       </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/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([
+    label: nodeOrStringProptype(),
-      React.PropTypes.string,
-      React.PropTypes.object
-    ]),
     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 }
+          readOnly={ readOnly }
-          max={ max }
+          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

@@ -53,13 +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) });
     }
   }
 
@@ -164,28 +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) }
+          { input }
-          { this.state.isEth ? (<div className={ styles.label }>ETH</div>) : null }
+          { isEth ? (<div className={ styles.label }>ETH</div>) : null }
         </div>
         <div className={ styles.toggle }>
           <Toggle
@@ -198,8 +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;
@@ -212,6 +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/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;
+  }
 }

js/src/ui/Theme/theme.spec.js

@@ -0,0 +1,55 @@
+// 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 getMuiTheme from 'material-ui/styles/getMuiTheme';
+import lightBaseTheme from 'material-ui/styles/baseThemes/lightBaseTheme';
+
+const muiTheme = getMuiTheme(lightBaseTheme);
+
+import theme from './theme';
+
+describe('ui/Theme', () => {
+  it('is MUI-based', () => {
+    expect(Object.keys(theme)).to.deep.equal(Object.keys(muiTheme).concat('parity'));
+  });
+
+  it('allows setting of Parity backgrounds', () => {
+    expect(typeof theme.parity.setBackgroundSeed === 'function').to.be.true;
+    expect(typeof theme.parity.getBackgroundStyle === 'function').to.be.true;
+  });
+
+  describe('parity', () => {
+    describe('setBackgroundSeed', () => {
+      const SEED = 'testseed';
+
+      beforeEach(() => {
+        theme.parity.setBackgroundSeed(SEED);
+      });
+
+      it('sets the correct theme values', () => {
+        expect(theme.parity.backgroundSeed).to.equal(SEED);
+      });
+    });
+
+    describe('getBackgroundStyle', () => {
+      it('generates a style containing background', () => {
+        const style = theme.parity.getBackgroundStyle();
+
+        expect(style).to.have.property('background');
+      });
+    });
+  });
+});

js/src/ui/TxList/TxRow/index.js

@@ -0,0 +1,17 @@
+// 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/>.
+
+export default from './txRow';

js/src/ui/TxList/TxRow/txRow.js

@@ -0,0 +1,133 @@
+// 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 moment from 'moment';
+import React, { Component, PropTypes } from 'react';
+
+import { txLink, addressLink } from '~/3rdparty/etherscan/links';
+
+import IdentityIcon from '../../IdentityIcon';
+import IdentityName from '../../IdentityName';
+import MethodDecoding from '../../MethodDecoding';
+
+import styles from '../txList.css';
+
+export default class TxRow extends Component {
+  static contextTypes = {
+    api: PropTypes.object.isRequired
+  };
+
+  static propTypes = {
+    tx: PropTypes.object.isRequired,
+    address: PropTypes.string.isRequired,
+    isTest: PropTypes.bool.isRequired,
+
+    block: PropTypes.object,
+    historic: PropTypes.bool,
+    className: PropTypes.string
+  };
+
+  static defaultProps = {
+    historic: true
+  };
+
+  render () {
+    const { tx, address, isTest, historic, className } = this.props;
+
+    return (
+      <tr className={ className || '' }>
+        { this.renderBlockNumber(tx.blockNumber) }
+        { this.renderAddress(tx.from) }
+        <td className={ styles.transaction }>
+          { this.renderEtherValue(tx.value) }
+          <div>⇒</div>
+          <div>
+            <a
+              className={ styles.link }
+              href={ txLink(tx.hash, isTest) }
+              target='_blank'>
+              { `${tx.hash.substr(2, 6)}...${tx.hash.slice(-6)}` }
+            </a>
+          </div>
+        </td>
+        { this.renderAddress(tx.to) }
+        <td className={ styles.method }>
+          <MethodDecoding
+            historic={ historic }
+            address={ address }
+            transaction={ tx } />
+        </td>
+      </tr>
+    );
+  }
+
+  renderAddress (address) {
+    const { isTest } = this.props;
+
+    let esLink = null;
+    if (address) {
+      esLink = (
+        <a
+          href={ addressLink(address, isTest) }
+          target='_blank'
+          className={ styles.link }>
+          <IdentityName address={ address } shorten />
+        </a>
+      );
+    }
+
+    return (
+      <td className={ styles.address }>
+        <div className={ styles.center }>
+          <IdentityIcon
+            center
+            className={ styles.icon }
+            address={ address } />
+        </div>
+        <div className={ styles.center }>
+          { esLink || 'DEPLOY' }
+        </div>
+      </td>
+    );
+  }
+
+  renderEtherValue (_value) {
+    const { api } = this.context;
+    const value = api.util.fromWei(_value);
+
+    if (value.eq(0)) {
+      return <div className={ styles.value }>{ ' ' }</div>;
+    }
+
+    return (
+      <div className={ styles.value }>
+        { value.toFormat(5) }<small>ETH</small>
+      </div>
+    );
+  }
+
+  renderBlockNumber (_blockNumber) {
+    const { block } = this.props;
+    const blockNumber = _blockNumber.toNumber();
+
+    return (
+      <td className={ styles.timestamp }>
+        <div>{ blockNumber && block ? moment(block.timestamp).fromNow() : null }</div>
+        <div>{ blockNumber ? _blockNumber.toFormat() : 'Pending' }</div>
+      </td>
+    );
+  }
+}

js/src/ui/TxList/TxRow/txRow.spec.js

@@ -0,0 +1,51 @@
+// 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 from 'react';
+import { shallow } from 'enzyme';
+import sinon from 'sinon';
+
+import Api from '~/api';
+
+import TxRow from './txRow';
+
+const api = new Api({ execute: sinon.stub() });
+
+function renderShallow (props) {
+  return shallow(
+    <TxRow
+      { ...props } />,
+    { context: { api } }
+  );
+}
+
+describe('ui/TxRow', () => {
+  describe('rendering', () => {
+    it('renders defaults', () => {
+      const block = {
+        timestamp: new Date()
+      };
+      const tx = {
+        blockNumber: new BigNumber(123),
+        hash: '0x123456789abcdef0123456789abcdef0123456789abcdef',
+        value: new BigNumber(1)
+      };
+
+      expect(renderShallow({ block, tx })).to.be.ok;
+    });
+  });
+});

js/src/ui/TxList/store.js

@@ -45,6 +45,8 @@ export default class Store {
 
           if (bnB.eq(0)) {
             return bnB.eq(bnA) ? 0 : 1;
+          } else if (bnA.eq(0)) {
+            return -1;
           }
 
           return bnB.comparedTo(bnA);

js/src/ui/TxList/store.spec.js

@@ -0,0 +1,90 @@
+// 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 sinon from 'sinon';
+
+import Store from './store';
+
+const SUBID = 123;
+const BLOCKS = {
+  1: { blockhash: '0x1' },
+  2: { blockhash: '0x2' }
+};
+const TRANSACTIONS = {
+  '0x123': { blockNumber: new BigNumber(1) },
+  '0x234': { blockNumber: new BigNumber(0) },
+  '0x345': { blockNumber: new BigNumber(2) },
+  '0x456': { blockNumber: new BigNumber(0) }
+};
+
+describe('ui/TxList/store', () => {
+  let api;
+  let store;
+
+  beforeEach(() => {
+    api = {
+      subscribe: sinon.stub().resolves(SUBID),
+      eth: {
+        getBlockByNumber: (blockNumber) => {
+          return Promise.resolve(BLOCKS[blockNumber]);
+        }
+      }
+    };
+    store = new Store(api);
+  });
+
+  describe('create', () => {
+    it('has empty storage', () => {
+      expect(store.blocks).to.deep.equal({});
+      expect(store.sortedHashes.peek()).to.deep.equal([]);
+      expect(store.transactions).to.deep.equal({});
+    });
+
+    it('subscribes to eth_blockNumber', () => {
+      expect(api.subscribe).to.have.been.calledWith('eth_blockNumber');
+      expect(store._subscriptionId).to.equal(SUBID);
+    });
+  });
+
+  describe('addBlocks', () => {
+    beforeEach(() => {
+      store.addBlocks(BLOCKS);
+    });
+
+    it('adds the blocks to the list', () => {
+      expect(store.blocks).to.deep.equal(BLOCKS);
+    });
+  });
+
+  describe('addTransactions', () => {
+    beforeEach(() => {
+      store.addTransactions(TRANSACTIONS);
+    });
+
+    it('adds all transactions to the list', () => {
+      expect(store.transactions).to.deep.equal(TRANSACTIONS);
+    });
+
+    it('sorts transactions based on blockNumber', () => {
+      expect(store.sortedHashes.peek()).to.deep.equal(['0x234', '0x456', '0x345', '0x123']);
+    });
+
+    it('adds pending transactions to the pending queue', () => {
+      expect(store._pendingHashes).to.deep.equal(['0x234', '0x456']);
+    });
+  });
+});

js/src/ui/TxList/txList.js

@@ -14,128 +14,16 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-import moment from 'moment';
 import React, { Component, PropTypes } from 'react';
 import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
 import { observer } from 'mobx-react';
 
-import { txLink, addressLink } from '~/3rdparty/etherscan/links';
-
-import IdentityIcon from '../IdentityIcon';
-import IdentityName from '../IdentityName';
-import MethodDecoding from '../MethodDecoding';
 import Store from './store';
+import TxRow from './TxRow';
 
 import styles from './txList.css';
 
-export class TxRow extends Component {
-  static contextTypes = {
-    api: PropTypes.object.isRequired
-  };
-
-  static propTypes = {
-    tx: PropTypes.object.isRequired,
-    address: PropTypes.string.isRequired,
-    isTest: PropTypes.bool.isRequired,
-
-    block: PropTypes.object,
-    historic: PropTypes.bool,
-    className: PropTypes.string
-  };
-
-  static defaultProps = {
-    historic: true
-  };
-
-  render () {
-    const { tx, address, isTest, historic, className } = this.props;
-
-    return (
-      <tr className={ className || '' }>
-        { this.renderBlockNumber(tx.blockNumber) }
-        { this.renderAddress(tx.from) }
-        <td className={ styles.transaction }>
-          { this.renderEtherValue(tx.value) }
-          <div>⇒</div>
-          <div>
-            <a
-              className={ styles.link }
-              href={ txLink(tx.hash, isTest) }
-              target='_blank'>
-              { `${tx.hash.substr(2, 6)}...${tx.hash.slice(-6)}` }
-            </a>
-          </div>
-        </td>
-        { this.renderAddress(tx.to) }
-        <td className={ styles.method }>
-          <MethodDecoding
-            historic={ historic }
-            address={ address }
-            transaction={ tx } />
-        </td>
-      </tr>
-    );
-  }
-
-  renderAddress (address) {
-    const { isTest } = this.props;
-
-    let esLink = null;
-    if (address) {
-      esLink = (
-        <a
-          href={ addressLink(address, isTest) }
-          target='_blank'
-          className={ styles.link }>
-          <IdentityName address={ address } shorten />
-        </a>
-      );
-    }
-
-    return (
-      <td className={ styles.address }>
-        <div className={ styles.center }>
-          <IdentityIcon
-            center
-            className={ styles.icon }
-            address={ address } />
-        </div>
-        <div className={ styles.center }>
-          { esLink || 'DEPLOY' }
-        </div>
-      </td>
-    );
-  }
-
-  renderEtherValue (_value) {
-    const { api } = this.context;
-    const value = api.util.fromWei(_value);
-
-    if (value.eq(0)) {
-      return <div className={ styles.value }>{ ' ' }</div>;
-    }
-
-    return (
-      <div className={ styles.value }>
-        { value.toFormat(5) }<small>ETH</small>
-      </div>
-    );
-  }
-
-  renderBlockNumber (_blockNumber) {
-    const { block } = this.props;
-    const blockNumber = _blockNumber.toNumber();
-
-    return (
-      <td className={ styles.timestamp }>
-        <div>{ blockNumber && block ? moment(block.timestamp).fromNow() : null }</div>
-        <div>{ blockNumber ? _blockNumber.toFormat() : 'Pending' }</div>
-      </td>
-    );
-  }
-}
-
 @observer
 class TxList extends Component {
   static contextTypes = {

js/src/ui/TxList/txList.spec.js

@@ -0,0 +1,54 @@
+// 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 sinon from 'sinon';
+
+import Api from '~/api';
+
+import TxList from './txList';
+
+const api = new Api({ execute: sinon.stub() });
+
+const STORE = {
+  dispatch: sinon.stub(),
+  subscribe: sinon.stub(),
+  getState: () => {
+    return {
+      nodeStatus: {
+        isTest: true
+      }
+    };
+  }
+};
+
+function renderShallow (props) {
+  return shallow(
+    <TxList
+      store={ STORE }
+      { ...props } />,
+    { context: { api } }
+  );
+}
+
+describe('ui/TxList', () => {
+  describe('rendering', () => {
+    it('renders defaults', () => {
+      expect(renderShallow()).to.be.ok;
+    });
+  });
+});

js/src/util/wallets.js

@@ -14,9 +14,10 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-import { range } from 'lodash';
+import { range, uniq } from 'lodash';
 
 import { bytesToHex, toHex } from '~/api/util/format';
+import { validateAddress } from '~/util/validation';
 
 export default class WalletsUtils {
 
@@ -26,10 +27,82 @@ export default class WalletsUtils {
 
   static fetchOwners (walletContract) {
     const walletInstance = walletContract.instance;
+
     return walletInstance
       .m_numOwners.call()
       .then((mNumOwners) => {
-        return Promise.all(range(mNumOwners.toNumber()).map((idx) => walletInstance.getOwner.call({}, [ idx ])));
+        const promises = range(mNumOwners.toNumber())
+          .map((idx) => walletInstance.getOwner.call({}, [ idx ]));
+
+        return Promise
+          .all(promises)
+          .then((owners) => {
+            const uniqOwners = uniq(owners);
+
+            // If all owners are the zero account : must be Mist wallet contract
+            if (uniqOwners.length === 1 && /^(0x)?0*$/.test(owners[0])) {
+              return WalletsUtils.fetchMistOwners(walletContract, mNumOwners.toNumber());
+            }
+
+            return owners;
+          });
+      });
+  }
+
+  static fetchMistOwners (walletContract, mNumOwners) {
+    const walletAddress = walletContract.address;
+
+    return WalletsUtils
+      .getMistOwnersOffset(walletContract)
+      .then((result) => {
+        if (!result || result.offset === -1) {
+          return [];
+        }
+
+        const owners = [ result.address ];
+
+        if (mNumOwners === 1) {
+          return owners;
+        }
+
+        const initOffset = result.offset + 1;
+        let promise = Promise.resolve();
+
+        range(initOffset, initOffset + mNumOwners - 1).forEach((offset) => {
+          promise = promise
+            .then(() => {
+              return walletContract.api.eth.getStorageAt(walletAddress, offset);
+            })
+            .then((result) => {
+              const resultAddress = '0x' + (result || '').slice(-40);
+              const { address } = validateAddress(resultAddress);
+
+              owners.push(address);
+            });
+        });
+
+        return promise.then(() => owners);
+      });
+  }
+
+  static getMistOwnersOffset (walletContract, offset = 3) {
+    return walletContract.api.eth
+      .getStorageAt(walletContract.address, offset)
+      .then((result) => {
+        if (result && !/^(0x)?0*$/.test(result)) {
+          const resultAddress = '0x' + result.slice(-40);
+          const { address, addressError } = validateAddress(resultAddress);
+
+          if (!addressError) {
+            return { offset, address };
+          }
+        }
+
+        if (offset >= 100) {
+          return { offset: -1 };
+        }
+
+        return WalletsUtils.getMistOwnersOffset(walletContract, offset + 1);
       });
   }
 

js/src/views/Account/Header/header.js

@@ -31,12 +31,14 @@ export default class Header extends Component {
     account: PropTypes.object,
     balance: PropTypes.object,
     className: PropTypes.string,
-    children: PropTypes.node
+    children: PropTypes.node,
+    isContract: PropTypes.bool
   };
 
   static defaultProps = {
     className: '',
-    children: null
+    children: null,
+    isContract: false
   };
 
   render () {
@@ -88,9 +90,9 @@ export default class Header extends Component {
   }
 
   renderTxCount () {
-    const { balance } = this.props;
+    const { balance, isContract } = this.props;
 
-    if (!balance) {
+    if (!balance || isContract) {
       return null;
     }
 

js/src/views/Accounts/Summary/summary.js

@@ -75,6 +75,13 @@ export default class Summary extends Component {
       return true;
     }
 
+    const prevOwners = this.props.owners;
+    const nextOwners = nextProps.owners;
+
+    if (!isEqual(prevOwners, nextOwners)) {
+      return true;
+    }
+
     return false;
   }
 
@@ -123,8 +130,8 @@ export default class Summary extends Component {
     return (
       <div className={ styles.owners }>
         {
-          ownersValid.map((owner) => (
+          ownersValid.map((owner, index) => (
-            <div key={ owner.address }>
+            <div key={ `${index}_${owner.address}` }>
               <div
                 data-tip
                 data-for={ `owner_${owner.address}` }

js/src/views/Application/TabBar/tabBar.js

@@ -188,7 +188,7 @@ class TabBar extends Component {
     return (
       <ToolbarGroup>
         <div className={ styles.logo }>
-          <img src={ imagesEthcoreBlock } />
+          <img src={ imagesEthcoreBlock } height={ 28 } />
         </div>
       </ToolbarGroup>
     );

js/src/views/Contract/Events/events.js

@@ -17,7 +17,7 @@
 import React, { Component, PropTypes } from 'react';
 import { uniq } from 'lodash';
 
-import { Container } from '~/ui';
+import { Container, Loading } from '~/ui';
 
 import Event from './Event';
 import styles from '../contract.css';
@@ -25,18 +25,38 @@ import styles from '../contract.css';
 export default class Events extends Component {
   static contextTypes = {
     api: PropTypes.object
-  }
+  };
 
   static propTypes = {
-    events: PropTypes.array,
+    isTest: PropTypes.bool.isRequired,
-    isTest: PropTypes.bool.isRequired
+    isLoading: PropTypes.bool,
-  }
+    events: PropTypes.array
+  };
+
+  static defaultProps = {
+    isLoading: false,
+    events: []
+  };
 
   render () {
-    const { events, isTest } = this.props;
+    const { events, isTest, isLoading } = this.props;
+
+    if (isLoading) {
+      return (
+        <Container title='events'>
+          <div>
+            <Loading size={ 2 } />
+          </div>
+        </Container>
+      );
+    }
 
     if (!events || !events.length) {
-      return null;
+      return (
+        <Container title='events'>
+          <p>No events has been sent from this contract.</p>
+        </Container>
+      );
     }
 
     const eventsKey = uniq(events.map((e) => e.key));

js/src/views/Contract/Queries/queries.js

@@ -54,6 +54,10 @@ export default class Queries extends Component {
       .filter((fn) => fn.inputs.length > 0)
       .map((fn) => this.renderInputQuery(fn));
 
+    if (queries.length + noInputQueries.length + withInputQueries.length === 0) {
+      return null;
+    }
+
     return (
       <Container title='queries'>
         <div className={ styles.methods }>

js/src/views/Contract/contract.js

@@ -40,7 +40,7 @@ import styles from './contract.css';
 class Contract extends Component {
   static contextTypes = {
     api: React.PropTypes.object.isRequired
-  }
+  };
 
   static propTypes = {
     setVisibleAccounts: PropTypes.func.isRequired,
@@ -50,7 +50,7 @@ class Contract extends Component {
     contracts: PropTypes.object,
     isTest: PropTypes.bool,
     params: PropTypes.object
-  }
+  };
 
   state = {
     contract: null,
@@ -64,8 +64,9 @@ class Contract extends Component {
     allEvents: [],
     minedEvents: [],
     pendingEvents: [],
-    queryValues: {}
+    queryValues: {},
-  }
+    loadingEvents: true
+  };
 
   componentDidMount () {
     const { api } = this.context;
@@ -115,7 +116,7 @@ class Contract extends Component {
 
   render () {
     const { balances, contracts, params, isTest } = this.props;
-    const { allEvents, contract, queryValues } = this.state;
+    const { allEvents, contract, queryValues, loadingEvents } = this.state;
     const account = contracts[params.address];
     const balance = balances[params.address];
 
@@ -133,13 +134,19 @@ class Contract extends Component {
           <Header
             account={ account }
             balance={ balance }
+            isContract
           />
+
           <Queries
             contract={ contract }
-            values={ queryValues } />
+            values={ queryValues }
+          />
+
           <Events
             isTest={ isTest }
-            events={ allEvents } />
+            isLoading={ loadingEvents }
+            events={ allEvents }
+          />
 
           { this.renderDetails(account) }
         </Page>
@@ -358,6 +365,10 @@ class Contract extends Component {
   }
 
   _receiveEvents = (error, logs) => {
+    if (this.state.loadingEvents) {
+      this.setState({ loadingEvents: false });
+    }
+
     if (error) {
       console.error('_receiveEvents', error);
       return;

js/src/views/Signer/components/util/transaction.spec.js

@@ -17,7 +17,7 @@
 import BigNumber from 'bignumber.js';
 import { getShortData, getFee, getTotalValue } from './transaction';
 
-describe('util/transaction', () => {
+describe('views/Signer/components/util/transaction', () => {
   describe('getEstimatedMiningTime', () => {
     it('should return estimated mining time', () => {
     });

js/src/views/Status/components/AutoComplete/AutoComplete.spec.js

@@ -21,7 +21,7 @@ import getMuiTheme from 'material-ui/styles/getMuiTheme';
 
 import WrappedAutoComplete from './AutoComplete';
 
-describe('components/AutoComplete', () => {
+describe('views/Status/components/AutoComplete', () => {
   describe('rendering', () => {
     let rendered;
 

js/src/views/Status/components/Box/Box.spec.js

@@ -19,7 +19,7 @@ import { shallow } from 'enzyme';
 
 import Box from './Box';
 
-describe('components/Box', () => {
+describe('views/Status/components/Box', () => {
   describe('rendering', () => {
     const title = 'test title';
     let rendered;

js/src/views/Status/components/Call/Call.spec.js

@@ -22,7 +22,7 @@ import '../../../../environment/tests';
 
 import Call from './Call';
 
-describe('components/Call', () => {
+describe('views/Status/components/Call', () => {
   const call = { callIdx: 123, callNo: 456, name: 'eth_call', params: [{ name: '123' }], response: '' };
   const element = 'dummyElement';
 

js/src/views/Status/components/Calls/Calls.spec.js

@@ -21,7 +21,7 @@ import '../../../../environment/tests';
 
 import Calls from './Calls';
 
-describe('components/Calls', () => {
+describe('views/Status/components/Calls', () => {
   describe('rendering (no calls)', () => {
     let rendered;
 

js/src/views/Status/components/CallsToolbar/CallsToolbar.spec.js

@@ -22,7 +22,7 @@ import '../../../../environment/tests';
 
 import CallsToolbar from './CallsToolbar';
 
-describe('components/CallsToolbar', () => {
+describe('views/Status/components/CallsToolbar', () => {
   const callEl = { offsetTop: 0 };
   const containerEl = { scrollTop: 0, clientHeight: 0, scrollHeight: 999 };
 

js/src/views/Status/components/MiningSettings/decodeExtraData.spec.js

@@ -16,7 +16,7 @@
 
 import { decodeExtraData } from './decodeExtraData';
 
-describe('MINING SETTINGS', () => {
+describe('views/Status/components/MiningSettings/decodeExtraData', () => {
   describe('EXTRA DATA', () => {
     const str = 'parity/1.0.0/1.0.0-beta2';
     const encoded = '0xd783010000867061726974798b312e302e302d6265746132';

js/src/views/Status/components/MiningSettings/numberFromString.spec.js

@@ -16,7 +16,7 @@
 
 import { numberFromString } from './numberFromString';
 
-describe('NUMBER FROM STRING', () => {
+describe('views/Status/components/MiningSettings/numberFromString', () => {
   it('should convert string to number', () => {
     expect(numberFromString('12345'), 12345);
   });

js/src/views/Status/components/Response/Response.spec.js

@@ -21,7 +21,7 @@ import '../../../../environment/tests';
 
 import Response from './Response';
 
-describe('components/Response', () => {
+describe('views/Status/components/Response', () => {
   describe('rendering', () => {
     it('renders non-arrays/non-objects exactly as received', () => {
       const TEST = '1234567890';

js/src/views/Status/middleware/localstorage.spec.js

@@ -21,7 +21,7 @@ import { syncRpcStateFromLocalStorage } from '../actions/localstorage';
 import rpcData from '../data/rpc.json';
 import LocalStorageMiddleware from './localstorage';
 
-describe('MIDDLEWARE: LOCAL STORAGE', () => {
+describe('views/Status/middleware/localstorage', () => {
   let cut, state;
 
   beforeEach('mock cut', () => {

js/src/views/Status/util/error.spec.js

@@ -17,7 +17,7 @@
 import sinon from 'sinon';
 import * as ErrorUtil from './error';
 
-describe('util/error', () => {
+describe('views/Status/util/error', () => {
   beforeEach('spy on isError', () => {
     sinon.spy(ErrorUtil, 'isError');
   });

js/src/views/Status/util/index.spec.js

@@ -16,7 +16,7 @@
 
 import { toPromise, identity } from './';
 
-describe('util', () => {
+describe('views/Status/util', () => {
   describe('toPromise', () => {
     it('rejects on error result', () => {
       const ERROR = new Error();

js/src/views/Wallet/Confirmations/confirmations.js

@@ -23,7 +23,7 @@ import { bindActionCreators } from 'redux';
 import { confirmOperation, revokeOperation } from '~/redux/providers/walletActions';
 import { bytesToHex } from '~/api/util/format';
 import { Container, InputAddress, Button, IdentityIcon } from '~/ui';
-import { TxRow } from '~/ui/TxList/txList';
+import TxRow from '~/ui/TxList/TxRow';
 
 import styles from '../wallet.css';
 import txListStyles from '~/ui/TxList/txList.css';

js/src/views/Wallet/Details/details.js

@@ -55,9 +55,9 @@ export default class WalletDetails extends Component {
       return null;
     }
 
-    const ownersList = owners.map((address) => (
+    const ownersList = owners.map((address, idx) => (
       <InputAddress
-        key={ address }
+        key={ `${idx}_${address}` }
         value={ address }
         disabled
         text

js/src/views/Wallet/Transactions/transactions.js

@@ -18,7 +18,7 @@ import React, { Component, PropTypes } from 'react';
 
 import { bytesToHex } from '~/api/util/format';
 import { Container } from '~/ui';
-import { TxRow } from '~/ui/TxList/txList';
+import TxRow from '~/ui/TxList/TxRow';
 
 import txListStyles from '~/ui/TxList/txList.css';
 

js/src/views/Wallet/wallet.js

@@ -127,6 +127,7 @@ class Wallet extends Component {
               className={ styles.header }
               account={ wallet }
               balance={ balance }
+              isContract
             >
               { this.renderInfos() }
             </Header>
@@ -152,7 +153,13 @@ class Wallet extends Component {
       return null;
     }
 
-    const limit = api.util.fromWei(dailylimit.limit).toFormat(3);
+    const _limit = api.util.fromWei(dailylimit.limit);
+
+    if (_limit.equals(0)) {
+      return null;
+    }
+
+    const limit = _limit.toFormat(3);
     const spent = api.util.fromWei(dailylimit.spent).toFormat(3);
     const date = moment(dailylimit.last.toNumber() * 24 * 3600 * 1000);
 

js/test/mocha.config.js

@@ -22,11 +22,13 @@ es6Promise.polyfill();
 import 'mock-local-storage';
 
 import chai from 'chai';
+import chaiAsPromised from 'chai-as-promised';
 import chaiEnzyme from 'chai-enzyme';
 import sinonChai from 'sinon-chai';
 import { WebSocket } from 'mock-socket';
 import jsdom from 'jsdom';
 
+chai.use(chaiAsPromised);
 chai.use(chaiEnzyme());
 chai.use(sinonChai);
 

js/webpack/test.js

@@ -0,0 +1,26 @@
+// 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/>.
+
+const path = require('path');
+
+module.exports = {
+  context: path.join(__dirname, '../src'),
+  resolve: {
+    alias: {
+      '~': path.resolve(__dirname, '../src')
+    }
+  }
+};

parity/cli/config.full.toml

@@ -32,6 +32,7 @@ warp = true
 allow_ips = "all"
 snapshot_peers = 0
 max_pending_peers = 64
+serve_light = true
 
 reserved_only = false
 reserved_peers = "./path_to_file"

parity/cli/mod.rs

@@ -138,6 +138,8 @@ usage! {
 		flag_reserved_only: bool = false,
 			or |c: &Config| otry!(c.network).reserved_only.clone(),
 		flag_no_ancient_blocks: bool = false, or |_| None,
+		flag_serve_light: bool = false,
+			or |c: &Config| otry!(c.network).serve_light.clone(),
 
 		// -- API and Console Options
 		// RPC
@@ -346,6 +348,7 @@ struct Network {
 	node_key: Option<String>,
 	reserved_peers: Option<String>,
 	reserved_only: Option<bool>,
+	serve_light: Option<bool>,
 }
 
 #[derive(Default, Debug, PartialEq, RustcDecodable)]
@@ -561,6 +564,7 @@ mod tests {
 			flag_reserved_peers: Some("./path_to_file".into()),
 			flag_reserved_only: false,
 			flag_no_ancient_blocks: false,
+			flag_serve_light: true,
 
 			// -- API and Console Options
 			// RPC
@@ -737,6 +741,7 @@ mod tests {
 				node_key: None,
 				reserved_peers: Some("./path/to/reserved_peers".into()),
 				reserved_only: Some(true),
+				serve_light: None,
 			}),
 			rpc: Some(Rpc {
 				disable: Some(true),

parity/cli/usage.txt

@@ -109,6 +109,7 @@ Networking Options:
   --max-pending-peers NUM  Allow up to NUM pending connections. (default: {flag_max_pending_peers})
   --no-ancient-blocks      Disable downloading old blocks after snapshot restoration
                            or warp sync. (default: {flag_no_ancient_blocks})
+  --serve-light            Experimental: Serve light client peers. (default: {flag_serve_light})
 
 API and Console Options:
   --no-jsonrpc             Disable the JSON-RPC API server. (default: {flag_no_jsonrpc})

parity/configuration.rs

@@ -282,6 +282,7 @@ impl Configuration {
 				check_seal: !self.args.flag_no_seal_check,
 				download_old_blocks: !self.args.flag_no_ancient_blocks,
 				require_consensus: !self.args.flag_no_consensus,
+				serve_light: self.args.flag_serve_light,
 				verifier_settings: verifier_settings,
 			};
 			Cmd::Run(run_cmd)
@@ -959,6 +960,7 @@ mod tests {
 			check_seal: true,
 			download_old_blocks: true,
 			require_consensus: true,
+			serve_light: false,
 			verifier_settings: Default::default(),
 		}));
 	}

parity/main.rs

@@ -43,6 +43,7 @@ extern crate serde;
 extern crate serde_json;
 extern crate rlp;
 extern crate ethcore_hash_fetch as hash_fetch;
+extern crate ethcore_light as light;
 
 extern crate ethcore_ipc_hypervisor as hypervisor;
 extern crate ethcore_rpc;

parity/modules.rs

@@ -15,16 +15,22 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 use std::sync::Arc;
+use std::path::Path;
+
 use ethcore::client::BlockChainClient;
 use hypervisor::Hypervisor;
-use ethsync::{SyncConfig, NetworkConfiguration, NetworkError};
+use ethsync::{SyncConfig, NetworkConfiguration, NetworkError, Params};
 use ethcore::snapshot::SnapshotService;
+use light::Provider;
+
 #[cfg(not(feature="ipc"))]
 use self::no_ipc_deps::*;
+
+#[cfg(not(feature="ipc"))]
+use ethcore_logger::Config as LogConfig;
+
 #[cfg(feature="ipc")]
 use self::ipc_deps::*;
-use ethcore_logger::Config as LogConfig;
-use std::path::Path;
 
 #[cfg(feature="ipc")]
 pub mod service_urls {
@@ -36,6 +42,8 @@ pub mod service_urls {
 	pub const SYNC_NOTIFY: &'static str = "parity-sync-notify.ipc";
 	pub const NETWORK_MANAGER: &'static str = "parity-manage-net.ipc";
 	pub const SYNC_CONTROL: &'static str = "parity-sync-control.ipc";
+	pub const LIGHT_PROVIDER: &'static str = "parity-light-provider.ipc";
+
 	#[cfg(feature="stratum")]
 	pub const STRATUM: &'static str = "parity-stratum.ipc";
 	#[cfg(feature="stratum")]
@@ -75,6 +83,7 @@ mod ipc_deps {
 	pub use nanoipc::{GuardedSocket, NanoSocket, generic_client, fast_client};
 	pub use ipc::IpcSocket;
 	pub use ipc::binary::serialize;
+	pub use light::remote::LightProviderClient;
 }
 
 #[cfg(feature="ipc")]
@@ -124,6 +133,7 @@ pub fn sync
 		net_cfg: NetworkConfiguration,
 		_client: Arc<BlockChainClient>,
 		_snapshot_service: Arc<SnapshotService>,
+		_provider: Arc<Provider>,		
 		log_settings: &LogConfig,
 	)
 	-> Result<SyncModules, NetworkError>
@@ -141,7 +151,9 @@ pub fn sync
 		&service_urls::with_base(&hypervisor.io_path, service_urls::SYNC_NOTIFY)).unwrap();
 	let manage_client = generic_client::<NetworkManagerClient<_>>(
 		&service_urls::with_base(&hypervisor.io_path, service_urls::NETWORK_MANAGER)).unwrap();
-
+	let provider_client = generic_client::<LightProviderClient<_>>(
+		&service_urls::with_base(&hypervisor.io_path, service_urls::LIGHT_PROVIDER)).unwrap();
+		
 	*hypervisor_ref = Some(hypervisor);
 	Ok((sync_client, manage_client, notify_client))
 }
@@ -154,10 +166,18 @@ pub fn sync
 		net_cfg: NetworkConfiguration,
 		client: Arc<BlockChainClient>,
 		snapshot_service: Arc<SnapshotService>,
+		provider: Arc<Provider>,		
 		_log_settings: &LogConfig,
 	)
 	-> Result<SyncModules, NetworkError>
 {
-	let eth_sync = try!(EthSync::new(sync_cfg, client, snapshot_service, net_cfg));
+	let eth_sync = try!(EthSync::new(Params {
+		config: sync_cfg, 
+		chain: client,
+		provider: provider,
+		snapshot_service: snapshot_service, 
+		network_config: net_cfg,
+	}));
+
 	Ok((eth_sync.clone() as Arc<SyncProvider>, eth_sync.clone() as Arc<ManageNetwork>, eth_sync.clone() as Arc<ChainNotify>))
 }

parity/run.rs

@@ -95,6 +95,7 @@ pub struct RunCmd {
 	pub check_seal: bool,
 	pub download_old_blocks: bool,
 	pub require_consensus: bool,
+	pub serve_light: bool,
 	pub verifier_settings: VerifierSettings,
 }
 
@@ -192,6 +193,11 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 	);
 	info!("Operating mode: {}", Colour::White.bold().paint(format!("{}", mode)));
 
+	if cmd.serve_light {
+		info!("Configured to serve light client peers. Please note this feature is {}.",
+			Colour::White.bold().paint("experimental".to_string()));
+	}
+
 	// display warning about using experimental journaldb alorithm
 	if !algorithm.is_stable() {
 		warn!("Your chosen strategy is {}! You can re-run with --pruning to change.", Colour::Red.bold().paint("unstable"));
@@ -211,6 +217,7 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 	sync_config.fork_block = spec.fork_block();
 	sync_config.warp_sync = cmd.warp_sync;
 	sync_config.download_old_blocks = cmd.download_old_blocks;
+	sync_config.serve_light = cmd.serve_light;
 
 	let passwords = try!(passwords_from_files(&cmd.acc_conf.password_files));
 
@@ -289,7 +296,13 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 
 	// create sync object
 	let (sync_provider, manage_network, chain_notify) = try!(modules::sync(
-		&mut hypervisor, sync_config, net_conf.into(), client.clone(), snapshot_service.clone(), &cmd.logger_config,
+		&mut hypervisor, 
+		sync_config, 
+		net_conf.into(), 
+		client.clone(), 
+		snapshot_service.clone(), 
+		client.clone(), 
+		&cmd.logger_config,
 	).map_err(|e| format!("Sync error: {}", e)));
 
 	service.add_notify(chain_notify.clone());

parity/sync.rs

@@ -22,6 +22,7 @@ use hypervisor::{SYNC_MODULE_ID, HYPERVISOR_IPC_URL, ControlService};
 use ethcore::client::ChainNotify;
 use ethcore::client::remote::RemoteClient;
 use ethcore::snapshot::remote::RemoteSnapshotService;
+use light::remote::LightProviderClient;
 use ethsync::{SyncProvider, EthSync, ManageNetwork, ServiceConfiguration};
 use modules::service_urls;
 use boot;
@@ -48,8 +49,15 @@ pub fn main() {
 
 	let remote_client = dependency!(RemoteClient, &service_urls::with_base(&service_config.io_path, service_urls::CLIENT));
 	let remote_snapshot = dependency!(RemoteSnapshotService, &service_urls::with_base(&service_config.io_path, service_urls::SNAPSHOT));
+	let remote_provider = dependency!(LightProviderClient, &service_urls::with_base(&service_config.io_path, service_urls::LIGHT_PROVIDER));
 
-	let sync = EthSync::new(service_config.sync, remote_client.service().clone(), remote_snapshot.service().clone(), service_config.net).unwrap();
+	let sync = EthSync::new(Params {
+		config: service_config.sync, 
+		chain: remote_client.service().clone(), 
+		snapshot_service: remote_snapshot.service().clone(), 
+		provider: remote_provider.service().clone(),
+		network_config: service_config.net
+	}).unwrap();
 
 	let _ = boot::main_thread();
 	let service_stop = Arc::new(AtomicBool::new(false));

scripts/targets.sh

@@ -17,4 +17,5 @@ export TARGETS="
 	-p ethcore-ipc \
 	-p ethcore-ipc-tests \
 	-p ethcore-ipc-nano \
+	-p ethcore-light \
 	-p parity"

sync/Cargo.toml

@@ -15,6 +15,7 @@ ethcore-ipc-codegen = { path = "../ipc/codegen" }
 ethcore-util = { path = "../util" }
 ethcore-network = { path = "../util/network" }
 ethcore-io = { path = "../util/io" }
+ethcore-light = { path = "../ethcore/light"}
 ethcore = { path = "../ethcore" }
 rlp = { path = "../util/rlp" }
 clippy = { version = "0.0.103", optional = true}
@@ -31,6 +32,6 @@ ethkey = { path = "../ethkey" }
 parking_lot = "0.3"
 
 [features]
-default = ["ipc"]
+default = []
 dev = ["clippy", "ethcore/dev", "ethcore-util/dev"]
-ipc = []
+ipc = ["ethcore-light/ipc"]

sync/build.rs

@@ -16,6 +16,10 @@
 
 extern crate ethcore_ipc_codegen;
 
+#[cfg(feature = "ipc")]
 fn main() {
-	ethcore_ipc_codegen::derive_ipc_cond("src/api.rs", cfg!(feature="ipc")).unwrap();
+	ethcore_ipc_codegen::derive_ipc_cond("src/api.rs", true).unwrap();
 }
+
+#[cfg(not(feature = "ipc"))]
+fn main() {}

sync/src/api.rs

@@ -33,6 +33,7 @@ use ipc::{BinaryConvertable, BinaryConvertError, IpcConfig};
 use std::str::FromStr;
 use parking_lot::RwLock;
 use chain::{ETH_PACKET_COUNT, SNAPSHOT_SYNC_PACKET_COUNT};
+use light::net::{LightProtocol, Params as LightParams, Capabilities, Handler as LightHandler, EventContext};
 
 pub const WARP_SYNC_PROTOCOL_ID: ProtocolId = *b"par";
 
@@ -47,10 +48,14 @@ pub struct SyncConfig {
 	pub network_id: u64,
 	/// Main "eth" subprotocol name.
 	pub subprotocol_name: [u8; 3],
+	/// Light "les" subprotocol name.
+	pub light_subprotocol_name: [u8; 3],
 	/// Fork block to check
 	pub fork_block: Option<(BlockNumber, H256)>,
 	/// Enable snapshot sync
 	pub warp_sync: bool,
+	/// Enable light client server.
+	pub serve_light: bool,
 }
 
 impl Default for SyncConfig {
@@ -60,8 +65,10 @@ impl Default for SyncConfig {
 			download_old_blocks: true,
 			network_id: 1,
 			subprotocol_name: *b"eth",
+			light_subprotocol_name: *b"les",
 			fork_block: None,
 			warp_sync: false,
+			serve_light: false,
 		}
 	}
 }
@@ -85,14 +92,18 @@ pub trait SyncProvider: Send + Sync {
 }
 
 /// Transaction stats
-#[derive(Debug, Binary)]
+#[derive(Debug)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub struct TransactionStats {
+	/// Block number where this TX was first seen.
 	pub first_seen: u64,
+	/// Peers it was propagated to.
 	pub propagated_to: BTreeMap<H512, usize>,
 }
 
 /// Peer connection information
-#[derive(Debug, Binary)]
+#[derive(Debug)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub struct PeerInfo {
 	/// Public node id
 	pub id: Option<String>,
@@ -112,51 +123,93 @@ pub struct PeerInfo {
 	pub eth_difficulty: Option<U256>,
 }
 
+/// EthSync initialization parameters.
+#[cfg_attr(feature = "ipc", derive(Binary))]
+pub struct Params {
+	/// Configuration.
+	pub config: SyncConfig,
+	/// Blockchain client.
+	pub chain: Arc<BlockChainClient>,
+	/// Snapshot service.
+	pub snapshot_service: Arc<SnapshotService>,
+	/// Light data provider.
+	pub provider: Arc<::light::Provider>,
+	/// Network layer configuration.
+	pub network_config: NetworkConfiguration,
+}
+
 /// Ethereum network protocol handler
 pub struct EthSync {
 	/// Network service
 	network: NetworkService,
-	/// Protocol handler
+	/// Main (eth/par) protocol handler
-	handler: Arc<SyncProtocolHandler>,
+	sync_handler: Arc<SyncProtocolHandler>,
+	/// Light (les) protocol handler 
+	light_proto: Option<Arc<LightProtocol>>,
 	/// The main subprotocol name
 	subprotocol_name: [u8; 3],
-	/// Configuration
+	/// Light subprotocol name.
-	config: NetworkConfiguration,
+	light_subprotocol_name: [u8; 3],
 }
 
 impl EthSync {
 	/// Creates and register protocol with the network service
-	pub fn new(config: SyncConfig, chain: Arc<BlockChainClient>, snapshot_service: Arc<SnapshotService>, network_config: NetworkConfiguration) -> Result<Arc<EthSync>, NetworkError> {
+	pub fn new(params: Params) -> Result<Arc<EthSync>, NetworkError> {
-		let chain_sync = ChainSync::new(config, &*chain);
+		let pruning_info = params.chain.pruning_info();		
-		let service = try!(NetworkService::new(try!(network_config.clone().into_basic())));
+		let light_proto = match params.config.serve_light {
-		let sync = Arc::new(EthSync{
+			false => None,
+			true => Some({
+				let light_params = LightParams {
+					network_id: params.config.network_id,
+					flow_params: Default::default(),
+					capabilities: Capabilities {
+						serve_headers: true,
+						serve_chain_since: Some(pruning_info.earliest_chain),
+						serve_state_since: Some(pruning_info.earliest_state),
+						tx_relay: true,
+					},
+				};
+
+				let mut light_proto = LightProtocol::new(params.provider, light_params);
+				light_proto.add_handler(Box::new(TxRelay(params.chain.clone())));
+
+				Arc::new(light_proto)
+			})
+		};
+
+		let chain_sync = ChainSync::new(params.config, &*params.chain);
+		let service = try!(NetworkService::new(try!(params.network_config.clone().into_basic())));
+
+		let sync = Arc::new(EthSync {
 			network: service,
-			handler: Arc::new(SyncProtocolHandler {
+			sync_handler: Arc::new(SyncProtocolHandler {
 				sync: RwLock::new(chain_sync),
-				chain: chain,
+				chain: params.chain,
-				snapshot_service: snapshot_service,
+				snapshot_service: params.snapshot_service,
 				overlay: RwLock::new(HashMap::new()),
 			}),
-			subprotocol_name: config.subprotocol_name,
+			light_proto: light_proto,
-			config: network_config,
+			subprotocol_name: params.config.subprotocol_name,
+			light_subprotocol_name: params.config.light_subprotocol_name,
 		});
 
 		Ok(sync)
 	}
 }
 
-#[ipc(client_ident="SyncClient")]
+#[cfg_attr(feature = "ipc", ipc(client_ident="SyncClient"))]
 impl SyncProvider for EthSync {
 	/// Get sync status
 	fn status(&self) -> SyncStatus {
-		self.handler.sync.write().status()
+		self.sync_handler.sync.write().status()
 	}
 
 	/// Get sync peers
 	fn peers(&self) -> Vec<PeerInfo> {
+		// TODO: [rob] LES peers/peer info
 		self.network.with_context_eval(self.subprotocol_name, |context| {
-			let sync_io = NetSyncIo::new(context, &*self.handler.chain, &*self.handler.snapshot_service, &self.handler.overlay);
+			let sync_io = NetSyncIo::new(context, &*self.sync_handler.chain, &*self.sync_handler.snapshot_service, &self.sync_handler.overlay);
-			self.handler.sync.write().peers(&sync_io)
+			self.sync_handler.sync.write().peers(&sync_io)
 		}).unwrap_or(Vec::new())
 	}
 
@@ -165,7 +218,7 @@ impl SyncProvider for EthSync {
 	}
 
 	fn transactions_stats(&self) -> BTreeMap<H256, TransactionStats> {
-		let sync = self.handler.sync.read();
+		let sync = self.sync_handler.sync.read();
 		sync.transactions_stats()
 			.iter()
 			.map(|(hash, stats)| (*hash, stats.into()))
@@ -226,9 +279,11 @@ impl ChainNotify for EthSync {
 		sealed: Vec<H256>,
 		_duration: u64)
 	{
+		use light::net::Announcement;
+
 		self.network.with_context(self.subprotocol_name, |context| {
-			let mut sync_io = NetSyncIo::new(context, &*self.handler.chain, &*self.handler.snapshot_service, &self.handler.overlay);
+			let mut sync_io = NetSyncIo::new(context, &*self.sync_handler.chain, &*self.sync_handler.snapshot_service, &self.sync_handler.overlay);
-			self.handler.sync.write().chain_new_blocks(
+			self.sync_handler.sync.write().chain_new_blocks(
 				&mut sync_io,
 				&imported,
 				&invalid,
@@ -236,6 +291,25 @@ impl ChainNotify for EthSync {
 				&retracted,
 				&sealed);
 		});
+
+		self.network.with_context(self.light_subprotocol_name, |context| {
+			let light_proto = match self.light_proto.as_ref() {
+				Some(lp) => lp,
+				None => return,
+			};
+			
+			let chain_info = self.sync_handler.chain.chain_info();
+			light_proto.make_announcement(context, Announcement {
+				head_hash: chain_info.best_block_hash,
+				head_num: chain_info.best_block_number,
+				head_td: chain_info.total_difficulty,
+				reorg_depth: 0, // recalculated on a per-peer basis.
+				serve_headers: false, // these fields consist of _changes_ in capability.
+				serve_state_since: None,
+				serve_chain_since: None,
+				tx_relay: false,
+			})
+		})
 	}
 
 	fn start(&self) {
@@ -244,19 +318,36 @@ impl ChainNotify for EthSync {
 			Err(err) => warn!("Error starting network: {}", err),
 			_ => {},
 		}
-		self.network.register_protocol(self.handler.clone(), self.subprotocol_name, ETH_PACKET_COUNT, &[62u8, 63u8])
+		self.network.register_protocol(self.sync_handler.clone(), self.subprotocol_name, ETH_PACKET_COUNT, &[62u8, 63u8])
 			.unwrap_or_else(|e| warn!("Error registering ethereum protocol: {:?}", e));
 		// register the warp sync subprotocol
-		self.network.register_protocol(self.handler.clone(), WARP_SYNC_PROTOCOL_ID, SNAPSHOT_SYNC_PACKET_COUNT, &[1u8])
+		self.network.register_protocol(self.sync_handler.clone(), WARP_SYNC_PROTOCOL_ID, SNAPSHOT_SYNC_PACKET_COUNT, &[1u8])
 			.unwrap_or_else(|e| warn!("Error registering snapshot sync protocol: {:?}", e));
+		
+		// register the light protocol.
+		if let Some(light_proto) = self.light_proto.as_ref().map(|x| x.clone()) {
+			self.network.register_protocol(light_proto, self.light_subprotocol_name, ::light::net::PACKET_COUNT, ::light::net::PROTOCOL_VERSIONS)
+				.unwrap_or_else(|e| warn!("Error registering light client protocol: {:?}", e));
+		}
 	}
 
 	fn stop(&self) {
-		self.handler.snapshot_service.abort_restore();
+		self.sync_handler.snapshot_service.abort_restore();
 		self.network.stop().unwrap_or_else(|e| warn!("Error stopping network: {:?}", e));
 	}
 }
 
+/// LES event handler.
+/// Simply queues transactions from light client peers.
+struct TxRelay(Arc<BlockChainClient>);
+
+impl LightHandler for TxRelay {
+	fn on_transactions(&self, ctx: &EventContext, relay: &[::ethcore::transaction::SignedTransaction]) {
+		trace!(target: "les", "Relaying {} transactions from peer {}", relay.len(), ctx.peer());
+		self.0.queue_transactions(relay.iter().map(|tx| ::rlp::encode(tx).to_vec()).collect())
+	}
+}
+
 impl IpcConfig for ManageNetwork { }
 impl IpcConfig for SyncProvider { }
 
@@ -279,7 +370,7 @@ pub trait ManageNetwork : Send + Sync {
 }
 
 
-#[ipc(client_ident="NetworkManagerClient")]
+#[cfg_attr(feature = "ipc", ipc(client_ident="NetworkManagerClient"))]
 impl ManageNetwork for EthSync {
 	fn accept_unreserved_peers(&self) {
 		self.network.set_non_reserved_mode(NonReservedPeerMode::Accept);
@@ -303,9 +394,14 @@ impl ManageNetwork for EthSync {
 
 	fn stop_network(&self) {
 		self.network.with_context(self.subprotocol_name, |context| {
-			let mut sync_io = NetSyncIo::new(context, &*self.handler.chain, &*self.handler.snapshot_service, &self.handler.overlay);
+			let mut sync_io = NetSyncIo::new(context, &*self.sync_handler.chain, &*self.sync_handler.snapshot_service, &self.sync_handler.overlay);
-			self.handler.sync.write().abort(&mut sync_io);
+			self.sync_handler.sync.write().abort(&mut sync_io);
 		});
+
+		if let Some(light_proto) = self.light_proto.as_ref() {
+			light_proto.abort();
+		}
+
 		self.stop();
 	}
 
@@ -315,7 +411,8 @@ impl ManageNetwork for EthSync {
 }
 
 /// IP fiter
-#[derive(Binary, Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Debug, PartialEq, Eq)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub enum AllowIP {
 	/// Connect to any address
 	All,
@@ -337,7 +434,8 @@ impl AllowIP {
 	}
 }
 
-#[derive(Binary, Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 /// Network service configuration
 pub struct NetworkConfiguration {
 	/// Directory path to store general network configuration. None means nothing will be saved
@@ -375,26 +473,18 @@ pub struct NetworkConfiguration {
 }
 
 impl NetworkConfiguration {
+	/// Create a new default config.
 	pub fn new() -> Self {
 		From::from(BasicNetworkConfiguration::new())
 	}
 
+	/// Create a new local config.
 	pub fn new_local() -> Self {
 		From::from(BasicNetworkConfiguration::new_local())
 	}
 
-	fn validate(&self) -> Result<(), AddrParseError> {
+	/// Attempt to convert this config into a BasicNetworkConfiguration.
-		if let Some(ref addr) = self.listen_address {
-			try!(SocketAddr::from_str(&addr));
-		}
-		if let Some(ref addr) = self.public_address {
-			try!(SocketAddr::from_str(&addr));
-		}
-		Ok(())
-	}
-
 	pub fn into_basic(self) -> Result<BasicNetworkConfiguration, AddrParseError> {
-
 		Ok(BasicNetworkConfiguration {
 			config_path: self.config_path,
 			net_config_path: self.net_config_path,
@@ -447,9 +537,14 @@ impl From<BasicNetworkConfiguration> for NetworkConfiguration {
 	}
 }
 
-#[derive(Debug, Binary, Clone)]
+/// Configuration for IPC service.
+#[derive(Debug, Clone)]
+#[cfg_attr(feature = "ipc", derive(Binary))]
 pub struct ServiceConfiguration {
+	/// Sync config.
 	pub sync: SyncConfig,
+	/// Network configuration.
 	pub net: NetworkConfiguration,
+	/// IPC path.
 	pub io_path: String,
-}
+}

sync/src/lib.rs

@@ -37,6 +37,8 @@ extern crate semver;
 extern crate parking_lot;
 extern crate rlp;
 
+extern crate ethcore_light as light;
+
 #[cfg(test)] extern crate ethcore_devtools as devtools;
 #[cfg(test)] extern crate ethkey;
 
@@ -59,12 +61,16 @@ mod transactions_stats;
 #[cfg(test)]
 mod tests;
 
+#[cfg(feature = "ipc")]
 mod api {
 	#![allow(dead_code, unused_assignments, unused_variables, missing_docs)] // codegen issues
 	include!(concat!(env!("OUT_DIR"), "/api.rs"));
 }
 
-pub use api::{EthSync, SyncProvider, SyncClient, NetworkManagerClient, ManageNetwork, SyncConfig,
+#[cfg(not(feature = "ipc"))]
+mod api;
+
+pub use api::{EthSync, Params, SyncProvider, ManageNetwork, SyncConfig,
 	ServiceConfiguration, NetworkConfiguration, PeerInfo, AllowIP, TransactionStats};
 pub use chain::{SyncStatus, SyncState};
 pub use network::{is_valid_node_url, NonReservedPeerMode, NetworkError};

sync/src/tests/mod.rs

@@ -18,4 +18,6 @@ pub mod helpers;
 pub mod snapshot;
 mod chain;
 mod consensus;
+
+#[cfg(feature = "ipc")]
 mod rpc;

util/network/src/host.rs

@@ -868,6 +868,12 @@ impl Host {
 			let reserved = self.reserved_nodes.read();
 			if let Some(h) = handlers.get(&p).clone() {
 				h.connected(&NetworkContext::new(io, p, session.clone(), self.sessions.clone(), &reserved), &token);
+
+				// accumulate pending packets.
+				if let Some(session) = session.as_ref() {
+					let mut session = session.lock();
+					packet_data.extend(session.mark_connected(p));
+				}
 			}
 		}
 		for (p, packet_id, data) in packet_data {

util/network/src/session.rs

@@ -18,6 +18,8 @@ use std::{str, io};
 use std::net::SocketAddr;
 use std::cmp::Ordering;
 use std::sync::*;
+use std::collections::HashMap;
+
 use mio::*;
 use mio::deprecated::{Handler, EventLoop};
 use mio::tcp::*;
@@ -36,6 +38,14 @@ use time;
 const PING_TIMEOUT_SEC: u64 = 15;
 const PING_INTERVAL_SEC: u64 = 30;
 
+#[derive(Debug, Clone)]
+enum ProtocolState {
+	// Packets pending protocol on_connect event return.
+	Pending(Vec<(Vec<u8>, u8)>),
+	// Protocol connected.
+	Connected,
+}
+
 /// Peer session over encrypted connection.
 /// When created waits for Hello packet exchange and signals ready state.
 /// Sends and receives protocol packets and handles basic packes such as ping/pong and disconnect.
@@ -49,6 +59,8 @@ pub struct Session {
 	ping_time_ns: u64,
 	pong_time_ns: Option<u64>,
 	state: State,
+	// Protocol states -- accumulates pending packets until signaled as ready.	
+	protocol_states: HashMap<ProtocolId, ProtocolState>,		
 }
 
 enum State {
@@ -186,6 +198,7 @@ impl Session {
 			ping_time_ns: 0,
 			pong_time_ns: None,
 			expired: false,
+			protocol_states: HashMap::new(),			
 		})
 	}
 
@@ -361,6 +374,20 @@ impl Session {
 		self.connection().token()
 	}
 
+	/// Signal that a subprotocol has handled the connection successfully and 
+	/// get all pending packets in order received.
+	pub fn mark_connected(&mut self, protocol: ProtocolId) -> Vec<(ProtocolId, u8, Vec<u8>)> {
+		match self.protocol_states.insert(protocol, ProtocolState::Connected) {
+			None => Vec::new(),			
+			Some(ProtocolState::Connected) => {
+				debug!(target: "network", "Protocol {:?} marked as connected more than once", protocol);
+				Vec::new()
+			}
+			Some(ProtocolState::Pending(pending)) => 
+				pending.into_iter().map(|(data, id)| (protocol, id, data)).collect(),
+		}
+	}
+
 	fn read_packet<Message>(&mut self, io: &IoContext<Message>, packet: Packet, host: &HostInfo) -> Result<SessionData, NetworkError>
 	where Message: Send + Sync + Clone {
 		if packet.data.len() < 2 {
@@ -409,8 +436,19 @@ impl Session {
 				// map to protocol
 				let protocol = self.info.capabilities[i].protocol;
 				let pid = packet_id - self.info.capabilities[i].id_offset;
-				trace!(target: "network", "Packet {} mapped to {:?}:{}, i={}, capabilities={:?}", packet_id, protocol, pid, i, self.info.capabilities);
+
-				Ok(SessionData::Packet { data: packet.data, protocol: protocol, packet_id: pid } )
+				match *self.protocol_states.entry(protocol).or_insert_with(|| ProtocolState::Pending(Vec::new())) {
+					ProtocolState::Connected => {
+						trace!(target: "network", "Packet {} mapped to {:?}:{}, i={}, capabilities={:?}", packet_id, protocol, pid, i, self.info.capabilities);
+						Ok(SessionData::Packet { data: packet.data, protocol: protocol, packet_id: pid } )
+					}
+					ProtocolState::Pending(ref mut pending) => {
+						trace!(target: "network", "Packet {} deferred until protocol connection event completion", packet_id);
+						pending.push((packet.data, packet_id));
+
+						Ok(SessionData::Continue)
+					}
+				}
 			},
 			_ => {
 				debug!(target: "network", "Unknown packet: {:?}", packet_id);