Merge branch 'master' into check-updates

Cargo.lock

@@ -24,7 +24,7 @@ dependencies = [
  "ethcore-stratum 1.4.0",
  "ethcore-util 1.5.0",
  "ethsync 1.5.0",
- "fdlimit 0.1.0",
+ "fdlimit 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper 0.9.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "isatty 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -687,7 +687,8 @@ dependencies = [
 
 [[package]]
 name = "fdlimit"
-version = "0.1.0"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -843,7 +844,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "jsonrpc-core"
 version = "4.0.0"
-source = "git+https://github.com/ethcore/jsonrpc.git#20c7e55b84d7fd62732f062dc3058e1b71133e4a"
+source = "git+https://github.com/ethcore/jsonrpc.git#1500da1b9613a0a17fc0109d825f3ccc60199a53"
 dependencies = [
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -855,7 +856,7 @@ dependencies = [
 [[package]]
 name = "jsonrpc-http-server"
 version = "6.1.1"
-source = "git+https://github.com/ethcore/jsonrpc.git#20c7e55b84d7fd62732f062dc3058e1b71133e4a"
+source = "git+https://github.com/ethcore/jsonrpc.git#1500da1b9613a0a17fc0109d825f3ccc60199a53"
 dependencies = [
  "hyper 0.10.0-a.0 (git+https://github.com/ethcore/hyper)",
  "jsonrpc-core 4.0.0 (git+https://github.com/ethcore/jsonrpc.git)",
@@ -866,7 +867,7 @@ dependencies = [
 [[package]]
 name = "jsonrpc-ipc-server"
 version = "0.2.4"
-source = "git+https://github.com/ethcore/jsonrpc.git#20c7e55b84d7fd62732f062dc3058e1b71133e4a"
+source = "git+https://github.com/ethcore/jsonrpc.git#1500da1b9613a0a17fc0109d825f3ccc60199a53"
 dependencies = [
  "bytes 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -881,7 +882,7 @@ dependencies = [
 [[package]]
 name = "jsonrpc-tcp-server"
 version = "0.1.0"
-source = "git+https://github.com/ethcore/jsonrpc.git#20c7e55b84d7fd62732f062dc3058e1b71133e4a"
+source = "git+https://github.com/ethcore/jsonrpc.git#1500da1b9613a0a17fc0109d825f3ccc60199a53"
 dependencies = [
  "bytes 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1273,7 +1274,7 @@ dependencies = [
 [[package]]
 name = "parity-ui-precompiled"
 version = "1.4.0"
-source = "git+https://github.com/ethcore/js-precompiled.git#7700411d2b0ba1372e0d6cf72a84ecf873a181f3"
+source = "git+https://github.com/ethcore/js-precompiled.git#1690a80b9f56e33c8344f28eb637bacd97c9da14"
 dependencies = [
  "parity-dapps-glue 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -2047,6 +2048,7 @@ dependencies = [
 "checksum env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "aba65b63ffcc17ffacd6cf5aa843da7c5a25e3bd4bbe0b7def8b214e411250e5"
 "checksum eth-secp256k1 0.5.4 (git+https://github.com/ethcore/rust-secp256k1)" = "<none>"
 "checksum ethabi 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f7b0c53453517f620847be51943db329276ae52f2e210cfc659e81182864be2f"
+"checksum fdlimit 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b1ee15a7050e5580b3712877157068ea713b245b080ff302ae2ca973cfcd9baa"
 "checksum flate2 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)" = "3eeb481e957304178d2e782f2da1257f1434dfecbae883bafb61ada2a9fea3bb"
 "checksum gcc 0.3.35 (registry+https://github.com/rust-lang/crates.io-index)" = "91ecd03771effb0c968fd6950b37e89476a578aaf1c70297d8e92b6516ec3312"
 "checksum glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "8be18de09a56b60ed0edf84bc9df007e30040691af7acd1c41874faac5895bfb"

Cargo.toml

@@ -30,7 +30,7 @@ serde = "0.8.0"
 serde_json = "0.8.0"
 hyper = { version = "0.9", default-features = false }
 ctrlc = { git = "https://github.com/ethcore/rust-ctrlc.git" }
-fdlimit = { path = "util/fdlimit" }
+fdlimit = "0.1"
 ethcore = { path = "ethcore" }
 ethcore-util = { path = "util" }
 ethsync = { path = "sync" }

ethcore/light/Cargo.toml

@@ -5,6 +5,10 @@ license = "GPL-3.0"
 name = "ethcore-light"
 version = "1.5.0"
 authors = ["Ethcore <admin@ethcore.io>"]
+build = "build.rs"
+
+[build-dependencies]
+"ethcore-ipc-codegen" = { path = "../../ipc/codegen" }
 
 [dependencies]
 log = "0.3"
@@ -12,5 +16,6 @@ ethcore = { path = ".." }
 ethcore-util = { path = "../../util" }
 ethcore-network = { path = "../../util/network" }
 ethcore-io = { path = "../../util/io" }
+ethcore-ipc = { path = "../../ipc/rpc" }
 rlp = { path = "../../util/rlp" }
 time = "0.1"

ethcore/light/build.rs

@@ -14,8 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-import { PropTypes } from 'react';
+extern crate ethcore_ipc_codegen;
 
-export default function nullableProptype (type) {
+fn main() {
-  return PropTypes.oneOfType([ PropTypes.oneOf([ null ]), type ]);
+	ethcore_ipc_codegen::derive_binary("src/types/mod.rs.in").unwrap();
 }

ethcore/light/src/client.rs

@@ -101,7 +101,7 @@ impl Provider for Client {
 		Vec::new()
 	}
 
-	fn code(&self, _req: request::ContractCodes) -> Vec<Bytes> {
+	fn contract_code(&self, _req: request::ContractCodes) -> Vec<Bytes> {
 		Vec::new()
 	}
 

ethcore/light/src/lib.rs

@@ -28,20 +28,25 @@
 //! It starts by performing a header-only sync, verifying random samples
 //! of members of the chain to varying degrees.
 
-// TODO: remove when integrating with parity.
+// TODO: remove when integrating with the rest of parity.
 #![allow(dead_code)]
 
 pub mod client;
 pub mod net;
 pub mod provider;
-pub mod request;
 
-extern crate ethcore_util as util;
+mod types;
-extern crate ethcore_network as network;
+
-extern crate ethcore_io as io;
+pub use self::provider::Provider;
-extern crate ethcore;
+pub use types::les_request as request;
-extern crate rlp;
-extern crate time;
 
 #[macro_use]
 extern crate log;
+
+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;

ethcore/light/src/net/buffer_flow.rs

@@ -206,6 +206,39 @@ impl FlowParams {
 		cost.0 + (amount * cost.1)
 	}
 
+	/// Compute the maximum number of costs of a specific kind which can be made 
+	/// with the given buffer.
+	/// Saturates at `usize::max()`. This is not a problem in practice because
+	/// this amount of requests is already prohibitively large.
+	pub fn max_amount(&self, buffer: &Buffer, kind: request::Kind) -> usize {
+		use util::Uint;
+		use std::usize;
+
+		let cost = match kind {
+			request::Kind::Headers => &self.costs.headers,
+			request::Kind::Bodies => &self.costs.bodies,
+			request::Kind::Receipts => &self.costs.receipts,
+			request::Kind::StateProofs => &self.costs.state_proofs,
+			request::Kind::Codes => &self.costs.contract_codes,
+			request::Kind::HeaderProofs => &self.costs.header_proofs,
+		};
+
+		let start = buffer.current();
+
+		if start <= cost.0 {
+			return 0;
+		} else if cost.1 == U256::zero() {
+			return usize::MAX;
+		}
+
+		let max = (start - cost.0) / cost.1;
+		if max >= usize::MAX.into() {
+			usize::MAX
+		} else {
+			max.as_u64() as usize
+		}
+	}
+
 	/// Create initial buffer parameter.
 	pub fn create_buffer(&self) -> Buffer {
 		Buffer {
@@ -228,6 +261,16 @@ impl FlowParams {
 
 		buf.estimate = ::std::cmp::min(self.limit, buf.estimate + (elapsed * self.recharge));
 	}
+
+	/// Refund some buffer which was previously deducted.
+	/// Does not update the recharge timestamp.
+	pub fn refund(&self, buf: &mut Buffer, refund_amount: U256) {
+		buf.estimate = buf.estimate + refund_amount;
+
+		if buf.estimate > self.limit {
+			buf.estimate = self.limit
+		}
+	}
 }
 
 #[cfg(test)]

ethcore/light/src/net/error.rs

@@ -52,6 +52,8 @@ pub enum Error {
 	UnexpectedHandshake,
 	/// Peer on wrong network (wrong NetworkId or genesis hash)
 	WrongNetwork,
+	/// Unknown peer.
+	UnknownPeer,
 }
 
 impl Error {
@@ -64,6 +66,7 @@ impl Error {
 			Error::UnrecognizedPacket(_) => Punishment::Disconnect,
 			Error::UnexpectedHandshake => Punishment::Disconnect,
 			Error::WrongNetwork => Punishment::Disable,
+			Error::UnknownPeer => Punishment::Disconnect,
 		}
 	}
 }
@@ -89,6 +92,7 @@ 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"),
 		}
 	}
 }

ethcore/light/src/net/mod.rs

@@ -19,27 +19,28 @@
 //! This uses a "Provider" to answer requests.
 //! See https://github.com/ethcore/parity/wiki/Light-Ethereum-Subprotocol-(LES)
 
+use ethcore::transaction::SignedTransaction;
 use io::TimerToken;
 use network::{NetworkProtocolHandler, NetworkContext, NetworkError, PeerId};
 use rlp::{RlpStream, Stream, UntrustedRlp, View};
 use util::hash::H256;
-use util::RwLock;
+use util::{Mutex, RwLock, U256};
+use time::SteadyTime;
 
 use std::collections::{HashMap, HashSet};
-use std::sync::atomic::AtomicUsize;
+use std::sync::atomic::{AtomicUsize, Ordering};
 
 use provider::Provider;
 use request::{self, Request};
 
 use self::buffer_flow::{Buffer, FlowParams};
 use self::error::{Error, Punishment};
-use self::status::{Status, Capabilities};
 
 mod buffer_flow;
 mod error;
 mod status;
 
-pub use self::status::Announcement;
+pub use self::status::{Status, Capabilities, Announcement, NetworkId};
 
 const TIMEOUT: TimerToken = 0;
 const TIMEOUT_INTERVAL_MS: u64 = 1000;
@@ -86,6 +87,10 @@ mod packet {
 	pub const HEADER_PROOFS: u8 = 0x0e;
 }
 
+/// A request id.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct ReqId(usize);
+
 // A pending peer: one we've sent our status to but
 // may not have received one for.
 struct PendingPeer {
@@ -103,32 +108,162 @@ struct Peer {
 	sent_head: H256, // last head we've given them.
 }
 
+impl Peer {
+	// check the maximum cost of a request, returning an error if there's
+	// not enough buffer left.
+	// returns the calculated maximum cost.
+	fn deduct_max(&mut self, flow_params: &FlowParams, kind: request::Kind, max: usize) -> Result<U256, Error> {
+		flow_params.recharge(&mut self.local_buffer);
+
+		let max_cost = flow_params.compute_cost(kind, max);
+		try!(self.local_buffer.deduct_cost(max_cost));
+		Ok(max_cost)
+	}
+
+	// refund buffer for a request. returns new buffer amount.
+	fn refund(&mut self, flow_params: &FlowParams, amount: U256) -> U256 {
+		flow_params.refund(&mut self.local_buffer, amount);
+
+		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.
+pub trait Handler: Send + Sync {
+	/// Called when a peer connects.
+	fn on_connect(&self, _id: PeerId, _status: &Status, _capabilities: &Capabilities) { }
+	/// Called when a peer disconnects
+	fn on_disconnect(&self, _id: PeerId) { }
+	/// Called when a peer makes an announcement.
+	fn on_announcement(&self, _id: PeerId, _announcement: &Announcement) { }
+	/// Called when a peer requests relay of some transactions.
+	fn on_transactions(&self, _id: PeerId, _relay: &[SignedTransaction]) { }
+}
+
+// a request and the time it was made.
+struct Requested {
+	request: Request,
+	timestamp: SteadyTime,
+}
+
+/// Protocol parameters.
+pub struct Params {
+	/// Genesis hash.
+	pub genesis_hash: H256,
+	/// Network id.
+	pub network_id: NetworkId,
+	/// Buffer flow parameters.
+	pub flow_params: FlowParams,
+	/// Initial capabilities.
+	pub capabilities: Capabilities,
+}
+
 /// This is an implementation of the light ethereum network protocol, abstracted
 /// over a `Provider` of data and a p2p network.
 ///
 /// This is simply designed for request-response purposes. Higher level uses
 /// of the protocol, such as synchronization, will function as wrappers around
 /// this system.
+// 
+// LOCK ORDER:
+//   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>,
 	genesis_hash: H256,
-	network_id: status::NetworkId,
+	network_id: NetworkId,
 	pending_peers: RwLock<HashMap<PeerId, PendingPeer>>,
-	peers: RwLock<HashMap<PeerId, Peer>>,
+	peers: RwLock<HashMap<PeerId, Mutex<Peer>>>,
-	pending_requests: RwLock<HashMap<usize, Request>>,
+	pending_requests: RwLock<HashMap<usize, Requested>>,
 	capabilities: RwLock<Capabilities>,
 	flow_params: FlowParams, // assumed static and same for every peer.
+	handlers: Vec<Box<Handler>>,
 	req_id: AtomicUsize,
 }
 
 impl LightProtocol {
+	/// Create a new instance of the protocol manager.
+	pub fn new(provider: Box<Provider>, params: Params) -> Self {
+		LightProtocol {
+			provider: provider,
+			genesis_hash: params.genesis_hash,
+			network_id: params.network_id,
+			pending_peers: RwLock::new(HashMap::new()),
+			peers: RwLock::new(HashMap::new()),
+			pending_requests: RwLock::new(HashMap::new()),
+			capabilities: RwLock::new(params.capabilities),
+			flow_params: params.flow_params,
+			handlers: Vec::new(),
+			req_id: AtomicUsize::new(0),
+		}
+	}
+
+	/// 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| {
+			let mut peer = peer.lock();
+			peer.recharge_remote();
+			peer.remote_flow.max_amount(&peer.remote_buffer, kind)
+		})
+	}
+
+	/// Make a request to a peer. 
+	///
+	/// Fails on: nonexistent peer, network error,
+	/// 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> {
+		let peers = self.peers.read();
+		let peer = try!(peers.get(peer_id).ok_or_else(|| Error::UnknownPeer));
+		let mut peer = peer.lock();
+
+		peer.recharge_remote();
+
+		let max = peer.remote_flow.compute_cost(request.kind(), request.amount());
+		try!(peer.remote_buffer.deduct_cost(max));
+
+		let req_id = self.req_id.fetch_add(1, Ordering::SeqCst);
+		let packet_data = encode_request(&request, req_id);
+
+		let packet_id = match request.kind() {
+			request::Kind::Headers => packet::GET_BLOCK_HEADERS,
+			request::Kind::Bodies => packet::GET_BLOCK_BODIES,
+			request::Kind::Receipts => packet::GET_RECEIPTS,
+			request::Kind::StateProofs => packet::GET_PROOFS,
+			request::Kind::Codes => packet::GET_CONTRACT_CODES,
+			request::Kind::HeaderProofs => packet::GET_HEADER_PROOFS,
+		};
+
+		try!(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(),
+		});
+
+		Ok(ReqId(req_id))
+	}
+
 	/// Make an announcement of new chain head and capabilities to all peers.
 	/// The announcement is expected to be valid.
-	pub fn make_announcement(&self, mut announcement: Announcement, io: &NetworkContext) {
+	pub fn make_announcement(&self, io: &NetworkContext, mut announcement: Announcement) {
 		let mut reorgs_map = HashMap::new();
 
+		// update stored capabilities
+		self.capabilities.write().update_from(&announcement);
+
 		// calculate reorg info and send packets
-		for (peer_id, peer_info) in self.peers.write().iter_mut() {
+		for (peer_id, peer_info) in self.peers.read().iter() {
+			let mut peer_info = peer_info.lock();
 			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) {
@@ -151,6 +286,14 @@ impl LightProtocol {
 			}
 		}
 	}
+
+	/// 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 
+	pub fn add_handler(&mut self, handler: Box<Handler>) {
+		self.handlers.push(handler);
+	}
 }
 
 impl LightProtocol {
@@ -173,7 +316,11 @@ impl LightProtocol {
 	fn on_disconnect(&self, peer: PeerId) {
 		// TODO: reassign all requests assigned to this peer.
 		self.pending_peers.write().remove(&peer);
-		self.peers.write().remove(&peer);
+		if self.peers.write().remove(&peer).is_some() {
+			for handler in &self.handlers {
+				handler.on_disconnect(peer)
+			}	
+		}
 	}
 
 	// send status to a peer.
@@ -219,15 +366,19 @@ impl LightProtocol {
 			return Err(Error::WrongNetwork);
 		}
 
-		self.peers.write().insert(*peer, Peer {
+		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,
+			status: status.clone(),
-			capabilities: capabilities,
+			capabilities: capabilities.clone(),
 			remote_flow: flow_params,
 			sent_head: pending.sent_head,
-		});
+		}));
+
+		for handler in &self.handlers {
+			handler.on_connect(*peer, &status, &capabilities)
+		}
 
 		Ok(())
 	}
@@ -240,13 +391,15 @@ impl LightProtocol {
 		}
 
 		let announcement = try!(status::parse_announcement(data));
-		let mut peers = self.peers.write();
+		let peers = self.peers.read();
 
-		let peer_info = match peers.get_mut(peer) {
+		let peer_info = match peers.get(peer) {
 			Some(info) => info,
 			None => return Ok(()),
 		};
 
+		let mut peer_info = peer_info.lock();
+
 		// update status.
 		{
 			// TODO: punish peer if they've moved backwards.
@@ -259,15 +412,11 @@ impl LightProtocol {
 		}
 
 		// update capabilities.
-		{
+		peer_info.capabilities.update_from(&announcement);
-			let caps = &mut peer_info.capabilities;
-			caps.serve_headers = caps.serve_headers || announcement.serve_headers;
-			caps.serve_state_since = caps.serve_state_since.or(announcement.serve_state_since);
-			caps.serve_chain_since = caps.serve_chain_since.or(announcement.serve_chain_since);
-			caps.tx_relay = caps.tx_relay || announcement.tx_relay;
-		}
 
-		// TODO: notify listeners if new best block.
+		for handler in &self.handlers {
+			handler.on_announcement(*peer, &announcement);
+		}
 
 		Ok(())
 	}
@@ -276,45 +425,39 @@ impl LightProtocol {
 	fn get_block_headers(&self, peer: &PeerId, io: &NetworkContext, data: UntrustedRlp) -> Result<(), Error> {
 		const MAX_HEADERS: usize = 512;
 
-		let mut present_buffer = match self.peers.read().get(peer) {
+		let peers = self.peers.read();
-			Some(peer) => peer.local_buffer.clone(),
+		let peer = match peers.get(peer) {
+			Some(peer) => peer,
 			None => {
-				debug!(target: "les", "Ignoring announcement from unknown peer");
+				debug!(target: "les", "Ignoring request from unknown peer");
 				return Ok(())
 			}
 		};
 
-		self.flow_params.recharge(&mut present_buffer);
+		let mut peer = peer.lock();
+
 		let req_id: u64 = try!(data.val_at(0));
 
-		let req = request::Headers {
+		let block = {
-			block: {
 			let rlp = try!(data.at(1));
 			(try!(rlp.val_at(0)), try!(rlp.val_at(1)))
-			},
+		};
+
+		let req = request::Headers {
+			block_num: block.0,
+			block_hash: block.1,
 			max: ::std::cmp::min(MAX_HEADERS, try!(data.val_at(2))),
 			skip: try!(data.val_at(3)),
 			reverse: try!(data.val_at(4)),
 		};
 
-		let max_cost = self.flow_params.compute_cost(request::Kind::Headers, req.max);
+		let max_cost = try!(peer.deduct_max(&self.flow_params, request::Kind::Headers, req.max));
-		try!(present_buffer.deduct_cost(max_cost));
 
 		let response = self.provider.block_headers(req);
 		let actual_cost = self.flow_params.compute_cost(request::Kind::Headers, response.len());
+		assert!(max_cost >= actual_cost, "Actual cost exceeded maximum computed cost.");
 
-		let cur_buffer = match self.peers.write().get_mut(peer) {
+		let cur_buffer = peer.refund(&self.flow_params, max_cost - actual_cost);
-			Some(peer) => {
-				self.flow_params.recharge(&mut peer.local_buffer);
-				try!(peer.local_buffer.deduct_cost(actual_cost));
-				peer.local_buffer.current()
-			}
-			None => {
-				debug!(target: "les", "peer disconnected during serving of request.");
-				return Ok(())
-			}
-		};
-
 		io.respond(packet::BLOCK_HEADERS, {
 			let mut stream = RlpStream::new_list(response.len() + 2);
 			stream.append(&req_id).append(&cur_buffer);
@@ -336,39 +479,30 @@ impl LightProtocol {
 	fn get_block_bodies(&self, peer: &PeerId, io: &NetworkContext, data: UntrustedRlp) -> Result<(), Error> {
 		const MAX_BODIES: usize = 256;
 
-		let mut present_buffer = match self.peers.read().get(peer) {
+		let peers = self.peers.read();
-			Some(peer) => peer.local_buffer.clone(),
+		let peer = match peers.get(peer) {
+			Some(peer) => peer,
 			None => {
-				debug!(target: "les", "Ignoring announcement from unknown peer");
+				debug!(target: "les", "Ignoring request from unknown peer");
 				return Ok(())
 			}
 		};
+		let mut peer = peer.lock();
 
-		self.flow_params.recharge(&mut present_buffer);
 		let req_id: u64 = try!(data.val_at(0));
 
 		let req = request::Bodies {
 			block_hashes: try!(data.iter().skip(1).take(MAX_BODIES).map(|x| x.as_val()).collect())
 		};
 
-		let max_cost = self.flow_params.compute_cost(request::Kind::Bodies, req.block_hashes.len());
+		let max_cost = try!(peer.deduct_max(&self.flow_params, request::Kind::Bodies, req.block_hashes.len()));
-		try!(present_buffer.deduct_cost(max_cost));
 
 		let response = self.provider.block_bodies(req);
 		let response_len = response.iter().filter(|x| &x[..] != &::rlp::EMPTY_LIST_RLP).count();
 		let actual_cost = self.flow_params.compute_cost(request::Kind::Bodies, response_len);
+		assert!(max_cost >= actual_cost, "Actual cost exceeded maximum computed cost.");
 
-		let cur_buffer = match self.peers.write().get_mut(peer) {
+		let cur_buffer = peer.refund(&self.flow_params, max_cost - actual_cost);
-			Some(peer) => {
-				self.flow_params.recharge(&mut peer.local_buffer);
-				try!(peer.local_buffer.deduct_cost(actual_cost));
-				peer.local_buffer.current()
-			}
-			None => {
-				debug!(target: "les", "peer disconnected during serving of request.");
-				return Ok(())
-			}
-		};
 
 		io.respond(packet::BLOCK_BODIES, {
 			let mut stream = RlpStream::new_list(response.len() + 2);
@@ -388,8 +522,44 @@ impl LightProtocol {
 	}
 
 	// Handle a request for receipts.
-	fn get_receipts(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+	fn get_receipts(&self, peer: &PeerId, io: &NetworkContext, data: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+		const MAX_RECEIPTS: usize = 256;
+
+		let peers = self.peers.read();
+		let peer = match peers.get(peer) {
+			Some(peer) => peer,
+			None => {
+				debug!(target: "les", "Ignoring request from unknown peer");
+				return Ok(())
+			}
+		};
+		let mut peer = peer.lock();
+
+		let req_id: u64 = try!(data.val_at(0));
+
+		let req = request::Receipts {
+			block_hashes: try!(data.iter().skip(1).take(MAX_RECEIPTS).map(|x| x.as_val()).collect())
+		};
+
+		let max_cost = try!(peer.deduct_max(&self.flow_params, request::Kind::Receipts, req.block_hashes.len()));
+
+		let response = self.provider.receipts(req);
+		let response_len = response.iter().filter(|x| &x[..] != &::rlp::EMPTY_LIST_RLP).count();
+		let actual_cost = self.flow_params.compute_cost(request::Kind::Receipts, response_len);
+		assert!(max_cost >= actual_cost, "Actual cost exceeded maximum computed cost.");
+
+		let cur_buffer = peer.refund(&self.flow_params, max_cost - actual_cost);
+
+		io.respond(packet::RECEIPTS, {
+			let mut stream = RlpStream::new_list(response.len() + 2);
+			stream.append(&req_id).append(&cur_buffer);
+
+			for receipts in response {
+				stream.append_raw(&receipts, 1);
+			}
+
+			stream.out()
+		}).map_err(Into::into)
 	}
 
 	// Receive a response for receipts.
@@ -398,8 +568,55 @@ impl LightProtocol {
 	}
 
 	// Handle a request for proofs.
-	fn get_proofs(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+	fn get_proofs(&self, peer: &PeerId, io: &NetworkContext, data: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+		const MAX_PROOFS: usize = 128;
+
+		let peers = self.peers.read();
+		let peer = match peers.get(peer) {
+			Some(peer) => peer,
+			None => {
+				debug!(target: "les", "Ignoring request from unknown peer");
+				return Ok(())
+			}
+		};
+		let mut peer = peer.lock();
+
+		let req_id: u64 = try!(data.val_at(0));
+
+		let req = {
+			let requests: Result<Vec<_>, Error> = data.iter().skip(1).take(MAX_PROOFS).map(|x| {
+				Ok(request::StateProof {
+					block: try!(x.val_at(0)),
+					key1: try!(x.val_at(1)),
+					key2: if try!(x.at(2)).is_empty() { None } else { Some(try!(x.val_at(2))) },
+					from_level: try!(x.val_at(3)),
+				})
+			}).collect();
+
+			request::StateProofs {
+				requests: try!(requests),
+			}
+		};
+
+		let max_cost = try!(peer.deduct_max(&self.flow_params, request::Kind::StateProofs, req.requests.len()));
+
+		let response = self.provider.proofs(req);
+		let response_len = response.iter().filter(|x| &x[..] != &::rlp::EMPTY_LIST_RLP).count();
+		let actual_cost = self.flow_params.compute_cost(request::Kind::StateProofs, response_len);
+		assert!(max_cost >= actual_cost, "Actual cost exceeded maximum computed cost.");
+
+		let cur_buffer = peer.refund(&self.flow_params, max_cost - actual_cost);
+
+		io.respond(packet::PROOFS, {
+			let mut stream = RlpStream::new_list(response.len() + 2);
+			stream.append(&req_id).append(&cur_buffer);
+
+			for proof in response {
+				stream.append_raw(&proof, 1);
+			}
+
+			stream.out()
+		}).map_err(Into::into)
 	}
 
 	// Receive a response for proofs.
@@ -408,8 +625,53 @@ impl LightProtocol {
 	}
 
 	// Handle a request for contract code.
-	fn get_contract_code(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+	fn get_contract_code(&self, peer: &PeerId, io: &NetworkContext, data: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+		const MAX_CODES: usize = 256;
+
+		let peers = self.peers.read();
+		let peer = match peers.get(peer) {
+			Some(peer) => peer,
+			None => {
+				debug!(target: "les", "Ignoring request from unknown peer");
+				return Ok(())
+			}
+		};
+		let mut peer = peer.lock();
+
+		let req_id: u64 = try!(data.val_at(0));
+
+		let req = {
+			let requests: Result<Vec<_>, Error> = data.iter().skip(1).take(MAX_CODES).map(|x| {
+				Ok(request::ContractCode {
+					block_hash: try!(x.val_at(0)),
+					account_key: try!(x.val_at(1)),
+				})
+			}).collect();
+
+			request::ContractCodes {
+				code_requests: try!(requests),
+			}
+		};
+
+		let max_cost = try!(peer.deduct_max(&self.flow_params, request::Kind::Codes, req.code_requests.len()));
+
+		let response = self.provider.contract_code(req);
+		let response_len = response.iter().filter(|x| !x.is_empty()).count();
+		let actual_cost = self.flow_params.compute_cost(request::Kind::Codes, response_len);
+		assert!(max_cost >= actual_cost, "Actual cost exceeded maximum computed cost.");
+
+		let cur_buffer = peer.refund(&self.flow_params, max_cost - actual_cost);
+
+		io.respond(packet::CONTRACT_CODES, {
+			let mut stream = RlpStream::new_list(response.len() + 2);
+			stream.append(&req_id).append(&cur_buffer);
+
+			for code in response {
+				stream.append_raw(&code, 1);
+			}
+
+			stream.out()
+		}).map_err(Into::into)
 	}
 
 	// Receive a response for contract code.
@@ -418,8 +680,54 @@ impl LightProtocol {
 	}
 
 	// Handle a request for header proofs
-	fn get_header_proofs(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+	fn get_header_proofs(&self, peer: &PeerId, io: &NetworkContext, data: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+		const MAX_PROOFS: usize = 256;
+
+		let peers = self.peers.read();
+		let peer = match peers.get(peer) {
+			Some(peer) => peer,
+			None => {
+				debug!(target: "les", "Ignoring request from unknown peer");
+				return Ok(())
+			}
+		};
+		let mut peer = peer.lock();
+
+		let req_id: u64 = try!(data.val_at(0));
+
+		let req = {
+			let requests: Result<Vec<_>, Error> = data.iter().skip(1).take(MAX_PROOFS).map(|x| {
+				Ok(request::HeaderProof {
+					cht_number: try!(x.val_at(0)),
+					block_number: try!(x.val_at(1)),
+					from_level: try!(x.val_at(2)),
+				})
+			}).collect();
+
+			request::HeaderProofs {
+				requests: try!(requests),
+			}
+		};
+
+		let max_cost = try!(peer.deduct_max(&self.flow_params, request::Kind::HeaderProofs, req.requests.len()));
+
+		let response = self.provider.header_proofs(req);
+		let response_len = response.iter().filter(|x| &x[..] != ::rlp::EMPTY_LIST_RLP).count();
+		let actual_cost = self.flow_params.compute_cost(request::Kind::HeaderProofs, response_len);
+		assert!(max_cost >= actual_cost, "Actual cost exceeded maximum computed cost.");
+
+		let cur_buffer = peer.refund(&self.flow_params, max_cost - actual_cost);
+
+		io.respond(packet::HEADER_PROOFS, {
+			let mut stream = RlpStream::new_list(response.len() + 2);
+			stream.append(&req_id).append(&cur_buffer);
+
+			for proof in response {
+				stream.append_raw(&proof, 1);
+			}
+
+			stream.out()
+		}).map_err(Into::into)
 	}
 
 	// Receive a response for header proofs
@@ -428,8 +736,18 @@ impl LightProtocol {
 	}
 
 	// Receive a set of transactions to relay.
-	fn relay_transactions(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+	fn relay_transactions(&self, peer: &PeerId, data: UntrustedRlp) -> Result<(), Error> {
-		unimplemented!()
+		const MAX_TRANSACTIONS: usize = 256;
+
+		let txs: Vec<_> = try!(data.iter().take(MAX_TRANSACTIONS).map(|x| x.as_val::<SignedTransaction>()).collect());
+
+		debug!(target: "les", "Received {} transactions to relay from peer {}", txs.len(), peer);
+
+		for handler in &self.handlers {
+			handler.on_transactions(*peer, &txs);
+		}
+
+		Ok(())
 	}
 }
 
@@ -464,7 +782,7 @@ impl NetworkProtocolHandler for LightProtocol {
 			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),
+			packet::SEND_TRANSACTIONS => self.relay_transactions(peer, rlp),
 
 			other => {
 				Err(Error::UnrecognizedPacket(other))
@@ -504,3 +822,85 @@ impl NetworkProtocolHandler for LightProtocol {
 		}
 	}
 }
+
+// Helper for encoding the request to RLP with the given ID.
+fn encode_request(req: &Request, req_id: usize) -> Vec<u8> {
+	match *req {
+		Request::Headers(ref headers) => {
+			let mut stream = RlpStream::new_list(5);
+			stream
+				.append(&req_id)
+				.begin_list(2)
+					.append(&headers.block_num)
+					.append(&headers.block_hash)
+				.append(&headers.max)
+				.append(&headers.skip)
+				.append(&headers.reverse);
+			stream.out()
+		}
+		Request::Bodies(ref request) => {
+			let mut stream = RlpStream::new_list(request.block_hashes.len() + 1);
+			stream.append(&req_id);
+
+			for hash in &request.block_hashes {
+				stream.append(hash);
+			}
+
+			stream.out()
+		}
+		Request::Receipts(ref request) => {
+			let mut stream = RlpStream::new_list(request.block_hashes.len() + 1);
+			stream.append(&req_id);
+
+			for hash in &request.block_hashes {
+				stream.append(hash);
+			}
+
+			stream.out()
+		}
+		Request::StateProofs(ref request) => {
+			let mut stream = RlpStream::new_list(request.requests.len() + 1);
+			stream.append(&req_id);
+
+			for proof_req in &request.requests {
+				stream.begin_list(4)
+					.append(&proof_req.block)
+					.append(&proof_req.key1);
+
+				match proof_req.key2 {
+					Some(ref key2) => stream.append(key2),
+					None => stream.append_empty_data(),
+				};
+
+				stream.append(&proof_req.from_level);
+			}
+
+			stream.out()
+		}
+		Request::Codes(ref request) => {
+			let mut stream = RlpStream::new_list(request.code_requests.len() + 1);
+			stream.append(&req_id);
+
+			for code_req in &request.code_requests {
+				stream.begin_list(2)
+					.append(&code_req.block_hash)
+					.append(&code_req.account_key);
+			}
+
+			stream.out()
+		}
+		Request::HeaderProofs(ref request) => {
+			let mut stream = RlpStream::new_list(request.requests.len() + 1);
+			stream.append(&req_id);
+
+			for proof_req in &request.requests {
+				stream.begin_list(3)
+					.append(&proof_req.cht_number)
+					.append(&proof_req.block_number)
+					.append(&proof_req.from_level);
+			}
+
+			stream.out()
+		}
+	}
+}

ethcore/light/src/net/status.rs

@@ -183,8 +183,10 @@ pub struct Capabilities {
 	/// Whether this peer can serve headers
 	pub serve_headers: bool,
 	/// Earliest block number it can serve block/receipt requests for.
+	/// `None` means no requests will be servable.
 	pub serve_chain_since: Option<u64>,
 	/// Earliest block number it can serve state requests for.
+	/// `None` means no requests will be servable.
 	pub serve_state_since: Option<u64>,
 	/// Whether it can relay transactions to the eth network.
 	pub tx_relay: bool,
@@ -201,6 +203,16 @@ impl Default for Capabilities {
 	}
 }
 
+impl Capabilities {
+	/// Update the capabilities from an announcement.
+	pub fn update_from(&mut self, announcement: &Announcement) {
+		self.serve_headers = self.serve_headers || announcement.serve_headers;
+		self.serve_state_since = self.serve_state_since.or(announcement.serve_state_since);
+		self.serve_chain_since = self.serve_chain_since.or(announcement.serve_chain_since);
+		self.tx_relay = self.tx_relay || announcement.tx_relay;
+	}
+}
+
 /// Attempt to parse a handshake message into its three parts:
 ///   - chain status
 ///   - serving capabilities

ethcore/light/src/provider.rs

@@ -17,8 +17,11 @@
 //! A provider for the LES protocol. This is typically a full node, who can
 //! give as much data as necessary to its peers.
 
-use ethcore::transaction::SignedTransaction;
 use ethcore::blockchain_info::BlockChainInfo;
+use ethcore::client::{BlockChainClient, ProvingBlockChainClient};
+use ethcore::transaction::SignedTransaction;
+use ethcore::ids::BlockID;
+
 use util::{Bytes, H256};
 
 use request;
@@ -26,7 +29,8 @@ use request;
 /// Defines the operations that a provider for `LES` must fulfill.
 ///
 /// These are defined at [1], but may be subject to change.
-/// Requests which can't be fulfilled should return an empty RLP list.
+/// Requests which can't be fulfilled should return either an empty RLP list
+/// or empty vector where appropriate.
 ///
 /// [1]: https://github.com/ethcore/parity/wiki/Light-Ethereum-Subprotocol-(LES)
 pub trait Provider: Send + Sync {
@@ -34,9 +38,12 @@ pub trait Provider: Send + Sync {
 	fn chain_info(&self) -> BlockChainInfo;
 
 	/// Find the depth of a common ancestor between two blocks.
+	/// If either block is unknown or an ancestor can't be found
+	/// then return `None`.
 	fn reorg_depth(&self, a: &H256, b: &H256) -> Option<u64>;
 
-	/// Earliest state.
+	/// Earliest block where state queries are available.
+	/// If `None`, no state queries are servable.
 	fn earliest_state(&self) -> Option<u64>;
 
 	/// Provide a list of headers starting at the requested block,
@@ -57,11 +64,12 @@ pub trait Provider: Send + Sync {
 	/// Provide a set of merkle proofs, as requested. Each request is a
 	/// block hash and request parameters.
 	///
-	/// Returns a vector to RLP-encoded lists satisfying the requests.
+	/// Returns a vector of RLP-encoded lists satisfying the requests.
 	fn proofs(&self, req: request::StateProofs) -> Vec<Bytes>;
 
 	/// Provide contract code for the specified (block_hash, account_hash) pairs.
-	fn code(&self, req: request::ContractCodes) -> Vec<Bytes>;
+	/// 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.
 	fn header_proofs(&self, req: request::HeaderProofs) -> Vec<Bytes>;
@@ -69,3 +77,92 @@ pub trait Provider: Send + Sync {
 	/// Provide pending transactions.
 	fn pending_transactions(&self) -> Vec<SignedTransaction>;
 }
+
+// Implementation of a light client data provider for a client.
+impl<T: ProvingBlockChainClient + ?Sized> Provider for T {
+	fn chain_info(&self) -> BlockChainInfo {
+		BlockChainClient::chain_info(self)
+	}
+
+	fn reorg_depth(&self, a: &H256, b: &H256) -> Option<u64> {
+		self.tree_route(a, b).map(|route| route.index as u64)
+	}
+
+	fn earliest_state(&self) -> Option<u64> {
+		Some(self.pruning_info().earliest_state)
+	}
+
+	fn block_headers(&self, req: request::Headers) -> Vec<Bytes> {
+		let best_num = self.chain_info().best_block_number;
+		let start_num = req.block_num;
+
+		match self.block_hash(BlockID::Number(req.block_num)) {
+			Some(hash) if hash == req.block_hash => {}
+			_=> {
+				trace!(target: "les_provider", "unknown/non-canonical start block in header request: {:?}", (req.block_num, req.block_hash));
+				return vec![]
+			}
+		}
+
+		(0u64..req.max as u64)
+			.map(|x: u64| x.saturating_mul(req.skip))
+			.take_while(|x| if req.reverse { x < &start_num } else { best_num - start_num < *x })
+			.map(|x| if req.reverse { start_num - x } else { start_num + x })
+			.map(|x| self.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.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.block_receipts(&hash))
+			.map(|receipts| receipts.unwrap_or_else(|| ::rlp::EMPTY_LIST_RLP.to_vec()))
+			.collect()
+	}
+
+	fn proofs(&self, req: request::StateProofs) -> Vec<Bytes> {
+		use rlp::{RlpStream, Stream};
+
+		let mut results = Vec::with_capacity(req.requests.len());
+
+		for request in req.requests {
+			let proof = match request.key2 {
+				Some(key2) => self.prove_storage(request.key1, key2, request.from_level, BlockID::Hash(request.block)),
+				None => self.prove_account(request.key1, request.from_level, BlockID::Hash(request.block)),
+			};
+
+			let mut stream = RlpStream::new_list(proof.len());
+			for node in proof {
+				stream.append_raw(&node, 1);
+			}
+
+			results.push(stream.out());
+		}
+
+		results
+	}
+
+	fn contract_code(&self, req: request::ContractCodes) -> Vec<Bytes> {
+		req.code_requests.into_iter()
+			.map(|req| {
+				self.code_by_hash(req.account_key, BlockID::Hash(req.block_hash))
+			})
+			.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> {
+		BlockChainClient::pending_transactions(self)
+	}
+}

ethcore/light/src/types/les_request.rs

@@ -16,25 +16,26 @@
 
 //! LES request types.
 
-// TODO: make IPC compatible.
-
 use util::H256;
 
 /// A request for block headers.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Binary)]
 pub struct Headers {
-	/// Block information for the request being made.
+	/// Starting block number
-	pub block: (u64, H256),
+	pub block_num: u64,
+	/// Starting block hash. This and number could be combined but IPC codegen is
+	/// not robust enough to support it.
+	pub block_hash: H256,
 	/// The maximum amount of headers which can be returned.
 	pub max: usize,
 	/// The amount of headers to skip between each response entry.
-	pub skip: usize,
+	pub skip: u64,
 	/// Whether the headers should proceed in falling number from the initial block.
 	pub reverse: bool,
 }
 
 /// A request for specific block bodies.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Binary)]
 pub struct Bodies {
 	/// Hashes which bodies are being requested for.
 	pub block_hashes: Vec<H256>
@@ -44,14 +45,14 @@ pub struct Bodies {
 ///
 /// This request is answered with a list of transaction receipts for each block
 /// requested.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, 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)]
+#[derive(Debug, Clone, PartialEq, Eq, Binary)]
 pub struct StateProof {
 	/// Block hash to query state from.
 	pub block: H256,
@@ -65,21 +66,30 @@ pub struct StateProof {
 }
 
 /// A request for state proofs.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Binary)]
 pub struct StateProofs {
 	/// All the proof requests.
 	pub requests: Vec<StateProof>,
 }
 
 /// A request for contract code.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Binary)]
+pub struct ContractCode {
+	/// Block hash
+	pub block_hash: H256,
+	/// Account key (== sha3(address))
+	pub account_key: H256,
+}
+
+/// A request for contract code.
+#[derive(Debug, Clone, PartialEq, Eq, Binary)]
 pub struct ContractCodes {
 	/// Block hash and account key (== sha3(address)) pairs to fetch code for.
-	pub code_requests: Vec<(H256, H256)>,
+	pub code_requests: Vec<ContractCode>,
 }
 
 /// A request for a header proof from the Canonical Hash Trie.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Binary)]
 pub struct HeaderProof {
 	/// Number of the CHT.
 	pub cht_number: u64,
@@ -90,14 +100,14 @@ pub struct HeaderProof {
 }
 
 /// A request for header proofs from the CHT.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Binary)]
 pub struct HeaderProofs {
 	/// All the proof requests.
-	pub requests: Vec<HeaderProofs>,
+	pub requests: Vec<HeaderProof>,
 }
 
 /// Kinds of requests.
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Binary)]
 pub enum Kind {
 	/// Requesting headers.
 	Headers,
@@ -114,7 +124,7 @@ pub enum Kind {
 }
 
 /// Encompasses all possible types of requests in a single structure.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Binary)]
 pub enum Request {
 	/// Requesting headers.
 	Headers(Headers),
@@ -142,4 +152,16 @@ impl Request {
 			Request::HeaderProofs(_) => Kind::HeaderProofs,
 		}
 	}
+
+	/// Get the amount of requests being made.
+	pub fn amount(&self) -> usize {
+		match *self {
+			Request::Headers(ref req) => req.max,
+			Request::Bodies(ref req) => req.block_hashes.len(),
+			Request::Receipts(ref req) => req.block_hashes.len(),
+			Request::StateProofs(ref req) => req.requests.len(),
+			Request::Codes(ref req) => req.code_requests.len(),
+			Request::HeaderProofs(ref req) => req.requests.len(),
+		}
+	}
 }

ethcore/light/src/types/mod.rs

@@ -0,0 +1,20 @@
+// 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/>.
+
+//! Types used in the public (IPC) api which require custom code generation.
+
+#![allow(dead_code, unused_assignments, unused_variables)] // codegen issues
+include!(concat!(env!("OUT_DIR"), "/mod.rs.in"));

ethcore/light/src/types/mod.rs.in

@@ -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/>.
+
+pub mod les_request;

ethcore/src/account_provider/mod.rs

@@ -194,6 +194,11 @@ impl AccountProvider {
 		Ok(self.address_book.write().set_meta(account, meta))
 	}
 
+	/// Removes and address from the addressbook
+	pub fn remove_address(&self, addr: Address) -> Result<(), Error> {
+		Ok(self.address_book.write().remove(addr))
+	}
+
 	/// Returns each account along with name and meta.
 	pub fn accounts_info(&self) -> Result<HashMap<Address, AccountMeta>, Error> {
 		let r: HashMap<Address, AccountMeta> = try!(self.sstore.accounts())

ethcore/src/account_provider/stores.rs

@@ -74,6 +74,12 @@ impl AddressBook {
 		}
 		self.save();
 	}
+
+	/// Removes an entry
+	pub fn remove(&mut self, a: Address) {
+		self.cache.remove(&a);
+		self.save();
+	}
 }
 
 /// Dapps user settings
@@ -244,4 +250,22 @@ mod tests {
 			}
 		]);
 	}
+
+	#[test]
+	fn should_remove_address() {
+		let temp = RandomTempPath::create_dir();
+		let path = temp.as_str().to_owned();
+		let mut b = AddressBook::new(path.clone());
+
+		b.set_name(1.into(), "One".to_owned());
+		b.set_name(2.into(), "Two".to_owned());
+		b.set_name(3.into(), "Three".to_owned());
+		b.remove(2.into());
+
+		let b = AddressBook::new(path);
+		assert_eq!(b.get(), hash_map![
+			1.into() => AccountMeta{name: "One".to_owned(), meta: "{}".to_owned(), uuid: None},
+			3.into() => AccountMeta{name: "Three".to_owned(), meta: "{}".to_owned(), uuid: None}
+		]);
+	}
 }

ethcore/src/blockchain/blockchain.rs

@@ -34,6 +34,7 @@ use blockchain::update::ExtrasUpdate;
 use blockchain::{CacheSize, ImportRoute, Config};
 use db::{self, Writable, Readable, CacheUpdatePolicy};
 use cache_manager::CacheManager;
+use engines::Engine;
 
 const LOG_BLOOMS_LEVELS: usize = 3;
 const LOG_BLOOMS_ELEMENTS_PER_INDEX: usize = 16;
@@ -198,6 +199,9 @@ pub struct BlockChain {
 	pending_block_hashes: RwLock<HashMap<BlockNumber, H256>>,
 	pending_block_details: RwLock<HashMap<H256, BlockDetails>>,
 	pending_transaction_addresses: RwLock<HashMap<H256, Option<TransactionAddress>>>,
+
+	// Used for block ordering.
+	engine: Arc<Engine>,
 }
 
 impl BlockProvider for BlockChain {
@@ -415,9 +419,8 @@ impl<'a> Iterator for AncestryIter<'a> {
 }
 
 impl BlockChain {
-	#[cfg_attr(feature="dev", allow(useless_let_if_seq))]
+	/// Create new instance of blockchain from given Genesis and block picking rules of Engine.
-	/// Create new instance of blockchain from given Genesis
+	pub fn new(config: Config, genesis: &[u8], db: Arc<Database>, engine: Arc<Engine>) -> BlockChain {
-	pub fn new(config: Config, genesis: &[u8], db: Arc<Database>) -> BlockChain {
 		// 400 is the avarage size of the key
 		let cache_man = CacheManager::new(config.pref_cache_size, config.max_cache_size, 400);
 
@@ -442,6 +445,7 @@ impl BlockChain {
 			pending_block_hashes: RwLock::new(HashMap::new()),
 			pending_block_details: RwLock::new(HashMap::new()),
 			pending_transaction_addresses: RwLock::new(HashMap::new()),
+			engine: engine,
 		};
 
 		// load best block
@@ -858,13 +862,12 @@ impl BlockChain {
 		let number = header.number();
 		let parent_hash = header.parent_hash();
 		let parent_details = self.block_details(&parent_hash).unwrap_or_else(|| panic!("Invalid parent hash: {:?}", parent_hash));
-		let total_difficulty = parent_details.total_difficulty + header.difficulty();
+		let is_new_best = self.engine.is_new_best_block(self.best_block_total_difficulty(), HeaderView::new(&self.best_block_header()), &parent_details, header);
-		let is_new_best = total_difficulty > self.best_block_total_difficulty();
 
 		BlockInfo {
 			hash: hash,
 			number: number,
-			total_difficulty: total_difficulty,
+			total_difficulty: parent_details.total_difficulty + header.difficulty(),
 			location: if is_new_best {
 				// on new best block we need to make sure that all ancestors
 				// are moved to "canon chain"
@@ -1319,11 +1322,16 @@ mod tests {
 	use views::BlockView;
 	use transaction::{Transaction, Action};
 	use log_entry::{LogEntry, LocalizedLogEntry};
+	use spec::Spec;
 
 	fn new_db(path: &str) -> Arc<Database> {
 		Arc::new(Database::open(&DatabaseConfig::with_columns(::db::NUM_COLUMNS), path).unwrap())
 	}
 
+	fn new_chain(genesis: &[u8], db: Arc<Database>) -> BlockChain {
+		BlockChain::new(Config::default(), genesis, db, Spec::new_null().engine) 
+	}
+
 	#[test]
 	fn should_cache_best_block() {
 		// given
@@ -1334,7 +1342,7 @@ mod tests {
 
 		let temp = RandomTempPath::new();
 		let db = new_db(temp.as_str());
-		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+		let bc = new_chain(&genesis, db.clone());
 		assert_eq!(bc.best_block_number(), 0);
 
 		// when
@@ -1360,7 +1368,7 @@ mod tests {
 
 		let temp = RandomTempPath::new();
 		let db = new_db(temp.as_str());
-		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+		let bc = new_chain(&genesis, db.clone());
 
 		assert_eq!(bc.genesis_hash(), genesis_hash.clone());
 		assert_eq!(bc.best_block_hash(), genesis_hash.clone());
@@ -1391,7 +1399,7 @@ mod tests {
 
 		let temp = RandomTempPath::new();
 		let db = new_db(temp.as_str());
-		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+		let bc = new_chain(&genesis, db.clone());
 
 		let mut block_hashes = vec![genesis_hash.clone()];
 		let mut batch = db.transaction();
@@ -1427,7 +1435,7 @@ mod tests {
 
 		let temp = RandomTempPath::new();
 		let db = new_db(temp.as_str());
-		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+		let bc = new_chain(&genesis, db.clone());
 
 		let mut batch =db.transaction();
 		for b in &[&b1a, &b1b, &b2a, &b2b, &b3a, &b3b, &b4a, &b4b, &b5a, &b5b] {
@@ -1489,7 +1497,7 @@ mod tests {
 
 		let temp = RandomTempPath::new();
 		let db = new_db(temp.as_str());
-		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+		let bc = new_chain(&genesis, db.clone());
 
 		let mut batch = db.transaction();
 		let _ = bc.insert_block(&mut batch, &b1a, vec![]);
@@ -1577,7 +1585,7 @@ mod tests {
 
 		let temp = RandomTempPath::new();
 		let db = new_db(temp.as_str());
-		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+		let bc = new_chain(&genesis, db.clone());
 
 		let mut batch = db.transaction();
 		let _ = bc.insert_block(&mut batch, &b1a, vec![]);
@@ -1639,7 +1647,7 @@ mod tests {
 
 		let temp = RandomTempPath::new();
 		let db = new_db(temp.as_str());
-		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+		let bc = new_chain(&genesis, db.clone());
 
 		let mut batch = db.transaction();
 		let ir1 = bc.insert_block(&mut batch, &b1, vec![]);
@@ -1755,7 +1763,7 @@ mod tests {
 		let temp = RandomTempPath::new();
 		{
 			let db = new_db(temp.as_str());
-			let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+			let bc = new_chain(&genesis, db.clone());
 			assert_eq!(bc.best_block_hash(), genesis_hash);
 			let mut batch =db.transaction();
 			bc.insert_block(&mut batch, &first, vec![]);
@@ -1766,7 +1774,7 @@ mod tests {
 
 		{
 			let db = new_db(temp.as_str());
-			let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+			let bc = new_chain(&genesis, db.clone());
 
 			assert_eq!(bc.best_block_hash(), first_hash);
 		}
@@ -1821,7 +1829,7 @@ mod tests {
 
 		let temp = RandomTempPath::new();
 		let db = new_db(temp.as_str());
-		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+		let bc = new_chain(&genesis, db.clone());
 		let mut batch =db.transaction();
 		bc.insert_block(&mut batch, &b1, vec![]);
 		db.write(batch).unwrap();
@@ -1881,7 +1889,7 @@ mod tests {
 
 		let temp = RandomTempPath::new();
 		let db = new_db(temp.as_str());
-		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+		let bc = new_chain(&genesis, db.clone());
 		insert_block(&db, &bc, &b1, vec![Receipt {
 			state_root: H256::default(),
 			gas_used: 10_000.into(),
@@ -1985,7 +1993,7 @@ mod tests {
 
 		let temp = RandomTempPath::new();
 		let db = new_db(temp.as_str());
-		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+		let bc = new_chain(&genesis, db.clone());
 
 		let blocks_b1 = bc.blocks_with_bloom(&bloom_b1, 0, 5);
 		let blocks_b2 = bc.blocks_with_bloom(&bloom_b2, 0, 5);
@@ -2042,7 +2050,7 @@ mod tests {
 
 		{
 			let db = new_db(temp.as_str());
-			let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+			let bc = new_chain(&genesis, db.clone());
 			let uncle = canon_chain.fork(1).generate(&mut finalizer.fork()).unwrap();
 
 			let mut batch =db.transaction();
@@ -2061,7 +2069,7 @@ mod tests {
 
 		// re-loading the blockchain should load the correct best block.
 		let db = new_db(temp.as_str());
-		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+		let bc = new_chain(&genesis, db.clone());
 		assert_eq!(bc.best_block_number(), 5);
 	}
 
@@ -2078,7 +2086,7 @@ mod tests {
 
 		let temp = RandomTempPath::new();
 		let db = new_db(temp.as_str());
-		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+		let bc = new_chain(&genesis, db.clone());
 
 		let mut batch =db.transaction();
 		bc.insert_block(&mut batch, &first, vec![]);

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,
+	ChainNotify, PruningInfo, ProvingBlockChainClient,
 };
 use client::Error as ClientError;
 use env_info::EnvInfo;
@@ -173,7 +173,7 @@ impl Client {
 		let gb = spec.genesis_block();
 
 		let db = Arc::new(try!(Database::open(&db_config, &path.to_str().expect("DB path could not be converted to string.")).map_err(ClientError::Database)));
-		let chain = Arc::new(BlockChain::new(config.blockchain.clone(), &gb, db.clone()));
+		let chain = Arc::new(BlockChain::new(config.blockchain.clone(), &gb, db.clone(), spec.engine.clone()));
 		let tracedb = RwLock::new(TraceDB::new(config.tracing.clone(), db.clone(), chain.clone()));
 
 		let trie_spec = match config.fat_db {
@@ -854,7 +854,7 @@ impl snapshot::DatabaseRestore for Client {
 
 		let cache_size = state_db.cache_size();
 		*state_db = StateDB::new(journaldb::new(db.clone(), self.pruning, ::db::COL_STATE), cache_size);
-		*chain = Arc::new(BlockChain::new(self.config.blockchain.clone(), &[], db.clone()));
+		*chain = Arc::new(BlockChain::new(self.config.blockchain.clone(), &[], db.clone(), self.engine.clone()));
 		*tracedb = TraceDB::new(self.config.tracing.clone(), db.clone(), chain.clone());
 		Ok(())
 	}
@@ -1339,7 +1339,7 @@ impl BlockChainClient for Client {
 		self.miner.pending_transactions(self.chain.read().best_block_number())
 	}
 
-	fn signing_network_id(&self) -> Option<u8> {
+	fn signing_network_id(&self) -> Option<u64> {
 		self.engine.signing_network_id(&self.latest_env_info())
 	}
 
@@ -1353,6 +1353,13 @@ impl BlockChainClient for Client {
 		self.uncle(id)
 			.map(|header| self.engine.extra_info(&decode(&header)))
 	}
+
+	fn pruning_info(&self) -> PruningInfo {
+		PruningInfo {
+			earliest_chain: self.chain.read().first_block_number().unwrap_or(1),
+			earliest_state: self.state_db.lock().journal_db().earliest_era().unwrap_or(0),
+		}
+	}
 }
 
 impl MiningBlockChainClient for Client {
@@ -1437,13 +1444,40 @@ impl MayPanic for Client {
 	}
 }
 
+impl ProvingBlockChainClient for Client {
+	fn prove_storage(&self, key1: H256, key2: H256, from_level: u32, id: BlockID) -> Vec<Bytes> {
+		self.state_at(id)
+			.and_then(move |state| state.prove_storage(key1, key2, from_level).ok())
+			.unwrap_or_else(Vec::new)
+	}
 
-#[test]
+	fn prove_account(&self, key1: H256, from_level: u32, id: BlockID) -> Vec<Bytes> {
-fn should_not_cache_details_before_commit() {
+		self.state_at(id)
+			.and_then(move |state| state.prove_account(key1, from_level).ok())
+			.unwrap_or_else(Vec::new)
+	}
+
+	fn code_by_hash(&self, account_key: H256, id: BlockID) -> Bytes {
+		self.state_at(id)
+			.and_then(move |state| state.code_by_address_hash(account_key).ok())
+			.and_then(|x| x)
+			.unwrap_or_else(Vec::new)
+	}
+}
+
+#[cfg(test)]
+mod tests {
+
+	#[test]
+	fn should_not_cache_details_before_commit() {
+		use client::BlockChainClient;
 		use tests::helpers::*;
+
 		use std::thread;
 		use std::time::Duration;
+		use std::sync::Arc;
 		use std::sync::atomic::{AtomicBool, Ordering};
+		use util::kvdb::DBTransaction;
 
 		let client = generate_dummy_client(0);
 		let genesis = client.chain_info().best_block_hash;
@@ -1465,4 +1499,5 @@ fn should_not_cache_details_before_commit() {
 		while !go.load(Ordering::SeqCst) { thread::park_timeout(Duration::from_millis(5)); }
 
 		assert!(client.tree_route(&genesis, &new_hash).is_none());
+	}
 }

ethcore/src/client/mod.rs

@@ -29,18 +29,21 @@ mod fetch;
 pub use self::client::*;
 pub use self::config::{Mode, ClientConfig, UpdatePolicy, UpdateFilter, DatabaseCompactionProfile, BlockChainConfig, VMType};
 pub use self::error::Error;
-pub use types::ids::*;
 pub use self::test_client::{TestBlockChainClient, EachBlockWith};
+pub use self::chain_notify::ChainNotify;
+pub use self::traits::{BlockChainClient, MiningBlockChainClient, ProvingBlockChainClient};
+
+pub use types::ids::*;
 pub use types::trace_filter::Filter as TraceFilter;
+pub use types::pruning_info::PruningInfo;
+pub use types::call_analytics::CallAnalytics;
+
 pub use executive::{Executed, Executive, TransactOptions};
 pub use env_info::{LastHashes, EnvInfo};
-pub use self::chain_notify::ChainNotify;
 
-pub use types::call_analytics::CallAnalytics;
 pub use block_import_error::BlockImportError;
 pub use transaction_import::TransactionImportResult;
 pub use transaction_import::TransactionImportError;
-pub use self::traits::{BlockChainClient, MiningBlockChainClient};
 pub use verification::VerifierType;
 
 /// IPC interfaces

ethcore/src/client/test_client.rs

@@ -38,6 +38,7 @@ use evm::{Factory as EvmFactory, VMType, Schedule};
 use miner::{Miner, MinerService, TransactionImportResult};
 use spec::Spec;
 use types::mode::Mode;
+use types::pruning_info::PruningInfo;
 use views::BlockView;
 
 use verification::queue::QueueInfo;
@@ -662,9 +663,16 @@ impl BlockChainClient for TestBlockChainClient {
 		self.miner.pending_transactions(self.chain_info().best_block_number)
 	}
 
-	fn signing_network_id(&self) -> Option<u8> { None }
+	fn signing_network_id(&self) -> Option<u64> { None }
 
 	fn mode(&self) -> Mode { Mode::Active }
 
 	fn set_mode(&self, _: Mode) { unimplemented!(); }
+
+	fn pruning_info(&self) -> PruningInfo {
+		PruningInfo {
+			earliest_chain: 1,
+			earliest_state: 1,
+		}
+	}
 }

ethcore/src/client/traits.rs

@@ -39,6 +39,7 @@ use types::call_analytics::CallAnalytics;
 use types::blockchain_info::BlockChainInfo;
 use types::block_status::BlockStatus;
 use types::mode::Mode;
+use types::pruning_info::PruningInfo;
 
 #[ipc(client_ident="RemoteClient")]
 /// Blockchain database client. Owns and manages a blockchain and a block queue.
@@ -237,7 +238,7 @@ pub trait BlockChainClient : Sync + Send {
 	}
 
 	/// Get the preferred network ID to sign on
-	fn signing_network_id(&self) -> Option<u8>;
+	fn signing_network_id(&self) -> Option<u64>;
 
 	/// Get the mode.
 	fn mode(&self) -> Mode;
@@ -248,12 +249,17 @@ pub trait BlockChainClient : Sync + Send {
 	/// Returns engine-related extra info for `BlockId`.
 	fn block_extra_info(&self, id: BlockId) -> Option<BTreeMap<String, String>>;
 
-	/// Returns engine-related extra info for `UncleId`.
+	/// Returns engine-related extra info for `UncleID`.
 	fn uncle_extra_info(&self, id: UncleId) -> Option<BTreeMap<String, String>>;
+
+	/// Returns information about pruning/data availability.
+	fn pruning_info(&self) -> PruningInfo;
 }
 
+impl IpcConfig for BlockChainClient { }
+
 /// Extended client interface used for mining
-pub trait MiningBlockChainClient : BlockChainClient {
+pub trait MiningBlockChainClient: BlockChainClient {
 	/// Returns OpenBlock prepared for closing.
 	fn prepare_open_block(&self,
 		author: Address,
@@ -271,4 +277,23 @@ pub trait MiningBlockChainClient : BlockChainClient {
 	fn latest_schedule(&self) -> Schedule;
 }
 
-impl IpcConfig for BlockChainClient { }
+/// Extended client interface for providing proofs of the state.
+pub trait ProvingBlockChainClient: BlockChainClient {
+	/// Prove account storage at a specific block id.
+	///
+	/// Both provided keys assume a secure trie.
+	/// Returns a vector of raw trie nodes (in order from the root) proving the storage query.
+	/// Nodes after `from_level` may be omitted.
+	/// An empty vector indicates unservable query.
+	fn prove_storage(&self, key1: H256, key2: H256, from_level: u32, id: BlockID) -> Vec<Bytes>;
+
+	/// Prove account existence at a specific block id.
+	/// The key is the keccak hash of the account's address.
+	/// Returns a vector of raw trie nodes (in order from the root) proving the query.
+	/// Nodes after `from_level` may be omitted.
+	/// An empty vector indicates unservable query.	
+	fn prove_account(&self, key1: H256, from_level: u32, id: BlockID) -> Vec<Bytes>;
+
+	/// Get code by address hash.
+	fn code_by_hash(&self, account_key: H256, id: BlockID) -> Bytes;
+}

ethcore/src/engines/authority_round.rs

@@ -21,7 +21,7 @@ use std::sync::Weak;
 use std::time::{UNIX_EPOCH, Duration};
 use util::*;
 use ethkey::{verify_address, Signature};
-use rlp::{UntrustedRlp, View, encode};
+use rlp::{Rlp, UntrustedRlp, View, encode};
 use account_provider::AccountProvider;
 use block::*;
 use spec::CommonParams;
@@ -35,6 +35,8 @@ use service::ClientIoMessage;
 use transaction::SignedTransaction;
 use env_info::EnvInfo;
 use builtin::Builtin;
+use blockchain::extras::BlockDetails;
+use views::HeaderView;
 
 /// `AuthorityRound` params.
 #[derive(Debug, PartialEq)]
@@ -272,7 +274,6 @@ impl Engine for AuthorityRound {
 	}
 
 	fn verify_block_family(&self, header: &Header, parent: &Header, _block: Option<&[u8]>) -> Result<(), Error> {
-		// Don't calculate difficulty for genesis blocks.
 		if header.number() == 0 {
 			return Err(From::from(BlockError::RidiculousNumber(OutOfBounds { min: Some(1), max: None, found: header.number() })));
 		}
@@ -284,10 +285,6 @@ impl Engine for AuthorityRound {
 			try!(Err(BlockError::DoubleVote(header.author().clone())));
 		}
 
-		// Check difficulty is correct given the two timestamps.
-		if header.difficulty() != parent.difficulty() {
-			return Err(From::from(BlockError::InvalidDifficulty(Mismatch { expected: *parent.difficulty(), found: *header.difficulty() })))
-		}
 		let gas_limit_divisor = self.our_params.gas_limit_bound_divisor;
 		let min_gas = parent.gas_limit().clone() - parent.gas_limit().clone() / gas_limit_divisor;
 		let max_gas = parent.gas_limit().clone() + parent.gas_limit().clone() / gas_limit_divisor;
@@ -310,6 +307,19 @@ impl Engine for AuthorityRound {
 		let mut guard = self.message_channel.lock();
 		*guard = Some(message_channel);
 	}
+
+	fn is_new_best_block(&self, _best_total_difficulty: U256, best_header: HeaderView, _parent_details: &BlockDetails, new_header: &HeaderView) -> bool {
+		let new_number = new_header.number();
+		let best_number = best_header.number();
+		if new_number != best_number {
+			new_number > best_number
+		} else {
+			// Take the oldest step at given height.
+			let new_step: usize = Rlp::new(&new_header.seal()[0]).as_val();
+			let best_step: usize = Rlp::new(&best_header.seal()[0]).as_val();
+			new_step < best_step
+		}
+	}
 }
 
 #[cfg(test)]

ethcore/src/engines/mod.rs

@@ -38,6 +38,9 @@ use io::IoChannel;
 use service::ClientIoMessage;
 use header::Header;
 use transaction::SignedTransaction;
+use ethereum::ethash;
+use blockchain::extras::BlockDetails;
+use views::HeaderView;
 
 /// A consensus mechanism for the chain. Generally either proof-of-work or proof-of-stake-based.
 /// Provides hooks into each of the major parts of block import.
@@ -113,7 +116,7 @@ pub trait Engine : Sync + Send {
 	fn verify_transaction(&self, _t: &SignedTransaction, _header: &Header) -> Result<(), Error> { Ok(()) }
 
 	/// The network ID that transactions should be signed with.
-	fn signing_network_id(&self, _env_info: &EnvInfo) -> Option<u8> { None }
+	fn signing_network_id(&self, _env_info: &EnvInfo) -> Option<u64> { None }
 
 	/// Verify the seal of a block. This is an auxilliary method that actually just calls other `verify_` methods
 	/// to get the job done. By default it must pass `verify_basic` and `verify_block_unordered`. If more or fewer
@@ -146,5 +149,9 @@ pub trait Engine : Sync + Send {
 
 	/// Add a channel for communication with Client which can be used for sealing.
 	fn register_message_channel(&self, _message_channel: IoChannel<ClientIoMessage>) {}
-	// TODO: sealing stuff - though might want to leave this for later.
+
+	/// Check if new block should be chosen as the one  in chain.
+	fn is_new_best_block(&self, best_total_difficulty: U256, _best_header: HeaderView, parent_details: &BlockDetails, new_header: &HeaderView) -> bool {
+		ethash::is_new_best_block(best_total_difficulty, parent_details, new_header)
+	}
 }

ethcore/src/engines/null_engine.rs

@@ -38,6 +38,12 @@ impl NullEngine {
 	}
 }
 
+impl Default for NullEngine {
+	fn default() -> Self {
+		Self::new(Default::default(), Default::default())
+	}
+}
+
 impl Engine for NullEngine {
 	fn name(&self) -> &str {
 		"NullEngine"

ethcore/src/ethereum/ethash.rs

@@ -21,6 +21,7 @@ use builtin::Builtin;
 use env_info::EnvInfo;
 use error::{BlockError, TransactionError, Error};
 use header::Header;
+use views::HeaderView;
 use state::CleanupMode;
 use spec::CommonParams;
 use transaction::SignedTransaction;
@@ -28,6 +29,7 @@ use engines::Engine;
 use evm::Schedule;
 use ethjson;
 use rlp::{self, UntrustedRlp, View};
+use blockchain::extras::BlockDetails;
 
 /// Ethash params.
 #[derive(Debug, PartialEq)]
@@ -163,9 +165,9 @@ impl Engine for Ethash {
 		}
 	}
 
-	fn signing_network_id(&self, env_info: &EnvInfo) -> Option<u8> {
+	fn signing_network_id(&self, env_info: &EnvInfo) -> Option<u64> {
-		if env_info.number >= self.ethash_params.eip155_transition && self.params().network_id < 127 {
+		if env_info.number >= self.ethash_params.eip155_transition {
-			Some(self.params().network_id as u8)
+			Some(self.params().network_id)
 		} else {
 			None
 		}
@@ -314,7 +316,7 @@ impl Engine for Ethash {
 		}
 
 		if let Some(n) = t.network_id() {
-			if header.number() < self.ethash_params.eip155_transition || n as usize != self.params().network_id {
+			if header.number() < self.ethash_params.eip155_transition || n != self.params().network_id {
 				return Err(TransactionError::InvalidNetworkId.into())
 			}
 		}
@@ -325,6 +327,15 @@ impl Engine for Ethash {
 	fn verify_transaction(&self, t: &SignedTransaction, _header: &Header) -> Result<(), Error> {
 		t.sender().map(|_|()) // Perform EC recovery and cache sender
 	}
+
+	fn is_new_best_block(&self, best_total_difficulty: U256, _best_header: HeaderView, parent_details: &BlockDetails, new_header: &HeaderView) -> bool {
+		is_new_best_block(best_total_difficulty, parent_details, new_header)
+	}
+}
+
+/// Check if a new block should replace the best blockchain block.
+pub fn is_new_best_block(best_total_difficulty: U256, parent_details: &BlockDetails, new_header: &HeaderView) -> bool {
+	parent_details.total_difficulty + new_header.difficulty() > best_total_difficulty
 }
 
 #[cfg_attr(feature="dev", allow(wrong_self_convention))]

ethcore/src/snapshot/service.rs

@@ -81,6 +81,7 @@ struct Restoration {
 struct RestorationParams<'a> {
 	manifest: ManifestData, // manifest to base restoration on.
 	pruning: Algorithm, // pruning algorithm for the database.
+	engine: Arc<Engine>, // consensus engine of the chain.
 	db_path: PathBuf, // database path
 	db_config: &'a DatabaseConfig, // configuration for the database.
 	writer: Option<LooseWriter>, // writer for recovered snapshot.
@@ -99,7 +100,7 @@ impl Restoration {
 		let raw_db = Arc::new(try!(Database::open(params.db_config, &*params.db_path.to_string_lossy())
 			.map_err(UtilError::SimpleString)));
 
-		let chain = BlockChain::new(Default::default(), params.genesis, raw_db.clone());
+		let chain = BlockChain::new(Default::default(), params.genesis, raw_db.clone(), params.engine);
 		let blocks = try!(BlockRebuilder::new(chain, raw_db.clone(), &manifest));
 
 		let root = manifest.state_root.clone();
@@ -420,6 +421,7 @@ impl Service {
 		let params = RestorationParams {
 			manifest: manifest,
 			pruning: self.pruning,
+			engine: self.engine.clone(),
 			db_path: self.restoration_db(),
 			db_config: &self.db_config,
 			writer: writer,

ethcore/src/snapshot/tests/blocks.rs

@@ -37,13 +37,14 @@ fn chunk_and_restore(amount: u64) {
 	let genesis = canon_chain.generate(&mut finalizer).unwrap();
 	let db_cfg = DatabaseConfig::with_columns(::db::NUM_COLUMNS);
 
+	let engine = Arc::new(::engines::NullEngine::default());
 	let orig_path = RandomTempPath::create_dir();
 	let new_path = RandomTempPath::create_dir();
 	let mut snapshot_path = new_path.as_path().to_owned();
 	snapshot_path.push("SNAP");
 
 	let old_db = Arc::new(Database::open(&db_cfg, orig_path.as_str()).unwrap());
-	let bc = BlockChain::new(Default::default(), &genesis, old_db.clone());
+	let bc = BlockChain::new(Default::default(), &genesis, old_db.clone(), engine.clone());
 
 	// build the blockchain.
 	let mut batch = old_db.transaction();
@@ -73,21 +74,20 @@ fn chunk_and_restore(amount: u64) {
 
 	// restore it.
 	let new_db = Arc::new(Database::open(&db_cfg, new_path.as_str()).unwrap());
-	let new_chain = BlockChain::new(Default::default(), &genesis, new_db.clone());
+	let new_chain = BlockChain::new(Default::default(), &genesis, new_db.clone(), engine.clone());
 	let mut rebuilder = BlockRebuilder::new(new_chain, new_db.clone(), &manifest).unwrap();
 	let reader = PackedReader::new(&snapshot_path).unwrap().unwrap();
-	let engine = ::engines::NullEngine::new(Default::default(), Default::default());
 	let flag = AtomicBool::new(true);
 	for chunk_hash in &reader.manifest().block_hashes {
 		let compressed = reader.chunk(*chunk_hash).unwrap();
 		let chunk = snappy::decompress(&compressed).unwrap();
-		rebuilder.feed(&chunk, &engine, &flag).unwrap();
+		rebuilder.feed(&chunk, engine.as_ref(), &flag).unwrap();
 	}
 
 	rebuilder.finalize(HashMap::new()).unwrap();
 
 	// and test it.
-	let new_chain = BlockChain::new(Default::default(), &genesis, new_db);
+	let new_chain = BlockChain::new(Default::default(), &genesis, new_db, engine);
 	assert_eq!(new_chain.best_block_hash(), best_hash);
 }
 
@@ -121,8 +121,8 @@ fn checks_flag() {
 
 	let db_cfg = DatabaseConfig::with_columns(::db::NUM_COLUMNS);
 	let db = Arc::new(Database::open(&db_cfg, path.as_str()).unwrap());
-	let chain = BlockChain::new(Default::default(), &genesis, db.clone());
+	let engine = Arc::new(::engines::NullEngine::default());
-	let engine = ::engines::NullEngine::new(Default::default(), Default::default());
+	let chain = BlockChain::new(Default::default(), &genesis, db.clone(), engine.clone());
 
 	let manifest = ::snapshot::ManifestData {
 		state_hashes: Vec::new(),
@@ -134,7 +134,7 @@ fn checks_flag() {
 
 	let mut rebuilder = BlockRebuilder::new(chain, db.clone(), &manifest).unwrap();
 
-	match rebuilder.feed(&chunk, &engine, &AtomicBool::new(false)) {
+	match rebuilder.feed(&chunk, engine.as_ref(), &AtomicBool::new(false)) {
 		Err(Error::Snapshot(SnapshotError::RestorationAborted)) => {}
 		_ => panic!("Wrong result on abort flag set")
 	}

ethcore/src/spec/spec.rs

@@ -30,15 +30,14 @@ use ethjson;
 use rlp::{Rlp, RlpStream, View, Stream};
 
 /// Parameters common to all engines.
-#[derive(Debug, PartialEq, Clone)]
+#[derive(Debug, PartialEq, Clone, Default)]
-#[cfg_attr(test, derive(Default))]
 pub struct CommonParams {
 	/// Account start nonce.
 	pub account_start_nonce: U256,
 	/// Maximum size of extra data.
 	pub maximum_extra_data_size: usize,
 	/// Network id.
-	pub network_id: usize,
+	pub network_id: u64,
 	/// Main subprotocol name.
 	pub subprotocol_name: String,
 	/// Minimum gas limit.
@@ -164,7 +163,7 @@ impl Spec {
 	pub fn nodes(&self) -> &[String] { &self.nodes }
 
 	/// Get the configured Network ID.
-	pub fn network_id(&self) -> usize { self.params.network_id }
+	pub fn network_id(&self) -> u64 { self.params.network_id }
 
 	/// Get the configured subprotocol name.
 	pub fn subprotocol_name(&self) -> String { self.params.subprotocol_name.clone() }

ethcore/src/state/account.rs

@@ -436,6 +436,27 @@ impl Account {
 	}
 }
 
+// light client storage proof.
+impl Account {
+	/// Prove a storage key's existence or nonexistence in the account's storage
+	/// trie.
+	/// `storage_key` is the hash of the desired storage key, meaning
+	/// this will only work correctly under a secure trie.
+	/// Returns a merkle proof of the storage trie node with all nodes before `from_level`
+	/// omitted.
+	pub fn prove_storage(&self, db: &HashDB, storage_key: H256, from_level: u32) -> Result<Vec<Bytes>, Box<TrieError>> {
+		use util::trie::{Trie, TrieDB};
+		use util::trie::recorder::{Recorder, BasicRecorder as TrieRecorder};
+
+		let mut recorder = TrieRecorder::with_depth(from_level);
+
+		let trie = try!(TrieDB::new(db, &self.storage_root));
+		let _ = try!(trie.get_recorded(&storage_key, &mut recorder));
+
+		Ok(recorder.drain().into_iter().map(|r| r.data).collect())
+	}
+}
+
 impl fmt::Debug for Account {
 	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 		write!(f, "{:?}", PodAccount::from_account(self))

ethcore/src/state/mod.rs

@@ -16,7 +16,7 @@
 
 use std::cell::{RefCell, RefMut};
 use std::collections::hash_map::Entry;
-use util::*;
+
 use receipt::Receipt;
 use engines::Engine;
 use env_info::EnvInfo;
@@ -30,6 +30,9 @@ use types::state_diff::StateDiff;
 use transaction::SignedTransaction;
 use state_db::StateDB;
 
+use util::*;
+use util::trie::recorder::{Recorder, BasicRecorder as TrieRecorder};
+
 mod account;
 mod substate;
 
@@ -758,6 +761,53 @@ impl State {
 	}
 }
 
+// LES state proof implementations.
+impl State {
+	/// Prove an account's existence or nonexistence in the state trie.
+	/// Returns a merkle proof of the account's trie node with all nodes before `from_level`
+	/// omitted or an encountered trie error.
+	/// Requires a secure trie to be used for accurate results.
+	/// `account_key` == sha3(address)
+	pub fn prove_account(&self, account_key: H256, from_level: u32) -> Result<Vec<Bytes>, Box<TrieError>> {
+		let mut recorder = TrieRecorder::with_depth(from_level);
+		let trie = try!(TrieDB::new(self.db.as_hashdb(), &self.root));
+		let _  = try!(trie.get_recorded(&account_key, &mut recorder));
+
+		Ok(recorder.drain().into_iter().map(|r| r.data).collect())
+	}
+
+	/// Prove an account's storage key's existence or nonexistence in the state.
+	/// Returns a merkle proof of the account's storage trie with all nodes before
+	/// `from_level` omitted. Requires a secure trie to be used for correctness.
+	/// `account_key` == sha3(address)
+	/// `storage_key` == sha3(key)
+	pub fn prove_storage(&self, account_key: H256, storage_key: H256, from_level: u32) -> Result<Vec<Bytes>, Box<TrieError>> {
+		// TODO: probably could look into cache somehow but it's keyed by
+		// address, not sha3(address).
+		let trie = try!(TrieDB::new(self.db.as_hashdb(), &self.root));
+		let acc = match try!(trie.get(&account_key)) {
+			Some(rlp) => Account::from_rlp(&rlp),
+			None => return Ok(Vec::new()),
+		};
+
+		let account_db = self.factories.accountdb.readonly(self.db.as_hashdb(), account_key);
+		acc.prove_storage(account_db.as_hashdb(), storage_key, from_level)
+	}
+
+	/// Get code by address hash.
+	/// Only works when backed by a secure trie.
+	pub fn code_by_address_hash(&self, account_key: H256) -> Result<Option<Bytes>, Box<TrieError>> {
+		let trie = try!(TrieDB::new(self.db.as_hashdb(), &self.root));
+		let mut acc = match try!(trie.get(&account_key)) {
+			Some(rlp) => Account::from_rlp(&rlp),
+			None => return Ok(None),
+		};
+
+		let account_db = self.factories.accountdb.readonly(self.db.as_hashdb(), account_key);
+		Ok(acc.cache_code(account_db.as_hashdb()).map(|c| (&*c).clone()))
+	}
+}
+
 impl fmt::Debug for State {
 	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 		write!(f, "{:?}", self.cache.borrow())

ethcore/src/tests/helpers.rs

@@ -286,7 +286,7 @@ fn new_db(path: &str) -> Arc<Database> {
 pub fn generate_dummy_blockchain(block_number: u32) -> GuardedTempResult<BlockChain> {
 	let temp = RandomTempPath::new();
 	let db = new_db(temp.as_str());
-	let bc = BlockChain::new(BlockChainConfig::default(), &create_unverifiable_block(0, H256::zero()), db.clone());
+	let bc = BlockChain::new(BlockChainConfig::default(), &create_unverifiable_block(0, H256::zero()), db.clone(), Spec::new_null().engine);
 
 	let mut batch = db.transaction();
 	for block_order in 1..block_number {
@@ -304,7 +304,7 @@ pub fn generate_dummy_blockchain(block_number: u32) -> GuardedTempResult<BlockCh
 pub fn generate_dummy_blockchain_with_extra(block_number: u32) -> GuardedTempResult<BlockChain> {
 	let temp = RandomTempPath::new();
 	let db = new_db(temp.as_str());
-	let bc = BlockChain::new(BlockChainConfig::default(), &create_unverifiable_block(0, H256::zero()), db.clone());
+	let bc = BlockChain::new(BlockChainConfig::default(), &create_unverifiable_block(0, H256::zero()), db.clone(), Spec::new_null().engine);
 
 
 	let mut batch = db.transaction();
@@ -323,7 +323,7 @@ pub fn generate_dummy_blockchain_with_extra(block_number: u32) -> GuardedTempRes
 pub fn generate_dummy_empty_blockchain() -> GuardedTempResult<BlockChain> {
 	let temp = RandomTempPath::new();
 	let db = new_db(temp.as_str());
-	let bc = BlockChain::new(BlockChainConfig::default(), &create_unverifiable_block(0, H256::zero()), db.clone());
+	let bc = BlockChain::new(BlockChainConfig::default(), &create_unverifiable_block(0, H256::zero()), db.clone(), Spec::new_null().engine);
 
 	GuardedTempResult::<BlockChain> {
 		_temp: temp,

ethcore/src/types/mod.rs.in

@@ -34,3 +34,4 @@ pub mod block_import_error;
 pub mod restoration_status;
 pub mod snapshot_manifest;
 pub mod mode;
+pub mod pruning_info;

ethcore/src/types/pruning_info.rs

@@ -0,0 +1,30 @@
+// 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/>.
+
+//! Information about portions of the state and chain which the client may serve.
+//!
+//! Currently assumes that a client will store everything past a certain point
+//! or everything. Will be extended in the future to support a definition
+//! of which portions of the ancient chain and current state trie are stored as well.
+
+/// Client pruning info. See module-level docs for more details.
+#[derive(Debug, Clone, Binary)]
+pub struct PruningInfo {
+	/// The first block which everything can be served after.
+	pub earliest_chain: u64,
+	/// The first block where state requests may be served.
+	pub earliest_state: u64,
+}

ethcore/src/types/transaction.rs

@@ -72,7 +72,7 @@ pub struct Transaction {
 
 impl Transaction {
 	/// Append object with a without signature into RLP stream
-	pub fn rlp_append_unsigned_transaction(&self, s: &mut RlpStream, network_id: Option<u8>) {
+	pub fn rlp_append_unsigned_transaction(&self, s: &mut RlpStream, network_id: Option<u64>) {
 		s.begin_list(if network_id.is_none() { 6 } else { 9 });
 		s.append(&self.nonce);
 		s.append(&self.gas_price);
@@ -140,26 +140,26 @@ impl From<ethjson::transaction::Transaction> for SignedTransaction {
 
 impl Transaction {
 	/// The message hash of the transaction.
-	pub fn hash(&self, network_id: Option<u8>) -> H256 {
+	pub fn hash(&self, network_id: Option<u64>) -> H256 {
 		let mut stream = RlpStream::new();
 		self.rlp_append_unsigned_transaction(&mut stream, network_id);
 		stream.out().sha3()
 	}
 
 	/// Signs the transaction as coming from `sender`.
-	pub fn sign(self, secret: &Secret, network_id: Option<u8>) -> SignedTransaction {
+	pub fn sign(self, secret: &Secret, network_id: Option<u64>) -> SignedTransaction {
 		let sig = ::ethkey::sign(secret, &self.hash(network_id))
 			.expect("data is valid and context has signing capabilities; qed");
 		self.with_signature(sig, network_id)
 	}
 
 	/// Signs the transaction with signature.
-	pub fn with_signature(self, sig: Signature, network_id: Option<u8>) -> SignedTransaction {
+	pub fn with_signature(self, sig: Signature, network_id: Option<u64>) -> SignedTransaction {
 		SignedTransaction {
 			unsigned: self,
 			r: sig.r().into(),
 			s: sig.s().into(),
-			v: sig.v() + if let Some(n) = network_id { 35 + n * 2 } else { 27 },
+			v: sig.v() as u64 + if let Some(n) = network_id { 35 + n * 2 } else { 27 },
 			hash: Cell::new(None),
 			sender: Cell::new(None),
 		}
@@ -211,7 +211,7 @@ pub struct SignedTransaction {
 	unsigned: Transaction,
 	/// The V field of the signature; the LS bit described which half of the curve our point falls
 	/// in. The MS bits describe which network this transaction is for. If 27/28, its for all networks.
-	v: u8,
+	v: u64,
 	/// The R field of the signature; helps describe the point on the curve.
 	r: U256,
 	/// The S field of the signature; helps describe the point on the curve.
@@ -302,10 +302,13 @@ impl SignedTransaction {
 	}
 
 	/// 0 if `v` would have been 27 under "Electrum" notation, 1 if 28 or 4 if invalid.
-	pub fn standard_v(&self) -> u8 { match self.v { v if v == 27 || v == 28 || v > 36 => (v - 1) % 2, _ => 4 } }
+	pub fn standard_v(&self) -> u8 { match self.v { v if v == 27 || v == 28 || v > 36 => ((v - 1) % 2) as u8, _ => 4 } }
+
+	/// The `v` value that appears in the RLP.
+	pub fn original_v(&self) -> u64 { self.v }
 
 	/// The network ID, or `None` if this is a global transaction.
-	pub fn network_id(&self) -> Option<u8> {
+	pub fn network_id(&self) -> Option<u64> {
 		match self.v {
 			v if v > 36 => Some((v - 35) / 2),
 			_ => None,

ethcore/src/verification/queue/mod.rs

@@ -17,7 +17,7 @@
 //! A queue of blocks. Sits between network or other I/O and the `BlockChain`.
 //! Sorts them ready for blockchain insertion.
 
-use std::thread::{JoinHandle, self};
+use std::thread::{self, JoinHandle};
 use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering as AtomicOrdering};
 use std::sync::{Condvar as SCondvar, Mutex as SMutex};
 use util::*;
@@ -53,6 +53,8 @@ pub struct Config {
 	/// Maximum heap memory to use.
 	/// When the limit is reached, is_full returns true.
 	pub max_mem_use: usize,
+	/// Settings for the number of verifiers and adaptation strategy.
+	pub verifier_settings: VerifierSettings,
 }
 
 impl Default for Config {
@@ -60,39 +62,35 @@ impl Default for Config {
 		Config {
 			max_queue_size: 30000,
 			max_mem_use: 50 * 1024 * 1024,
+			verifier_settings: VerifierSettings::default(),
 		}
 	}
 }
 
-struct VerifierHandle {
+/// Verifier settings.
-	deleting: Arc<AtomicBool>,
+#[derive(Debug, PartialEq, Clone)]
-	sleep: Arc<AtomicBool>,
+pub struct VerifierSettings {
-	thread: JoinHandle<()>,
+	/// Whether to scale amount of verifiers according to load.
+	// Todo: replace w/ strategy enum?
+	pub scale_verifiers: bool,
+	/// Beginning amount of verifiers.
+	pub num_verifiers: usize,
 }
 
-impl VerifierHandle {
+impl Default for VerifierSettings {
-	// signal to the verifier thread that it should sleep.
+	fn default() -> Self {
-	fn sleep(&self) {
+		VerifierSettings {
-		self.sleep.store(true, AtomicOrdering::SeqCst);
+			scale_verifiers: false,
+			num_verifiers: MAX_VERIFIERS,
 		}
+	}
+}
 
-	// signal to the verifier thread that it should wake up.
+// pool states
-	fn wake_up(&self) {
+enum State {
-		self.sleep.store(false, AtomicOrdering::SeqCst);
+	// all threads with id < inner value are to work.
-		self.thread.thread().unpark();
+	Work(usize),
-	}
+	Exit,
-
-	// signal to the verifier thread that it should conclude its
-	// operations.
-	fn conclude(&self) {
-		self.wake_up();
-		self.deleting.store(true, AtomicOrdering::Release);
-	}
-
-	// join the verifier thread.
-	fn join(self) {
-		self.thread.join().expect("Verifier thread panicked");
-	}
 }
 
 /// An item which is in the process of being verified.
@@ -131,7 +129,6 @@ pub struct VerificationQueue<K: Kind> {
 	engine: Arc<Engine>,
 	more_to_verify: Arc<SCondvar>,
 	verification: Arc<Verification<K>>,
-	verifiers: Mutex<(Vec<VerifierHandle>, usize)>,
 	deleting: Arc<AtomicBool>,
 	ready_signal: Arc<QueueSignal>,
 	empty: Arc<SCondvar>,
@@ -139,6 +136,9 @@ pub struct VerificationQueue<K: Kind> {
 	ticks_since_adjustment: AtomicUsize,
 	max_queue_size: usize,
 	max_mem_use: usize,
+	scale_verifiers: bool,
+	verifier_handles: Vec<JoinHandle<()>>,	
+	state: Arc<(Mutex<State>, Condvar)>,
 }
 
 struct QueueSignal {
@@ -221,43 +221,45 @@ impl<K: Kind> VerificationQueue<K> {
 		});
 		let empty = Arc::new(SCondvar::new());
 		let panic_handler = PanicHandler::new_in_arc();
+		let scale_verifiers = config.verifier_settings.scale_verifiers;
 
-		let max_verifiers = min(::num_cpus::get(), MAX_VERIFIERS);
+		let num_cpus = ::num_cpus::get();
-		let default_amount = max(::num_cpus::get(), 3) - 2;
+		let max_verifiers = min(num_cpus, MAX_VERIFIERS);
-		let mut verifiers = Vec::with_capacity(max_verifiers);
+		let default_amount = max(1, min(max_verifiers, config.verifier_settings.num_verifiers));		
+		let state = Arc::new((Mutex::new(State::Work(default_amount)), Condvar::new()));		
+		let mut verifier_handles = Vec::with_capacity(max_verifiers);
 
 		debug!(target: "verification", "Allocating {} verifiers, {} initially active", max_verifiers, default_amount);
+		debug!(target: "verification", "Verifier auto-scaling {}", if scale_verifiers { "enabled" } else { "disabled" });
 
 		for i in 0..max_verifiers {
 			debug!(target: "verification", "Adding verification thread #{}", i);
 
-			let deleting = deleting.clone();
 			let panic_handler = panic_handler.clone();
 			let verification = verification.clone();
 			let engine = engine.clone();
 			let wait = more_to_verify.clone();
 			let ready = ready_signal.clone();
 			let empty = empty.clone();
+			let state = state.clone();
 
-			// enable only the first few verifiers.
+			let handle = thread::Builder::new()
-			let sleep = if i < default_amount {
-				Arc::new(AtomicBool::new(false))
-			} else {
-				Arc::new(AtomicBool::new(true))
-			};
-
-			verifiers.push(VerifierHandle {
-				deleting: deleting.clone(),
-				sleep: sleep.clone(),
-				thread: thread::Builder::new()
 				.name(format!("Verifier #{}", i))
 				.spawn(move || {
 					panic_handler.catch_panic(move || {
-							VerificationQueue::verify(verification, engine, wait, ready, deleting, empty, sleep)
+						VerificationQueue::verify(
+							verification, 
+							engine, 
+							wait, 
+							ready, 
+							empty, 
+							state,
+							i,
+						)
 					}).unwrap()
 				})
-					.expect("Failed to create verifier thread.")
+				.expect("Failed to create verifier thread.");
-			});
+			verifier_handles.push(handle);
 		}
 
 		VerificationQueue {
@@ -266,13 +268,15 @@ impl<K: Kind> VerificationQueue<K> {
 			ready_signal: ready_signal,
 			more_to_verify: more_to_verify,
 			verification: verification,
-			verifiers: Mutex::new((verifiers, default_amount)),
 			deleting: deleting,
 			processing: RwLock::new(HashSet::new()),
 			empty: empty,
 			ticks_since_adjustment: AtomicUsize::new(0),
 			max_queue_size: max(config.max_queue_size, MIN_QUEUE_LIMIT),
 			max_mem_use: max(config.max_mem_use, MIN_MEM_LIMIT),
+			scale_verifiers: scale_verifiers,
+			verifier_handles: verifier_handles,
+			state: state,
 		}
 	}
 
@@ -281,23 +285,30 @@ impl<K: Kind> VerificationQueue<K> {
 		engine: Arc<Engine>,
 		wait: Arc<SCondvar>,
 		ready: Arc<QueueSignal>,
-		deleting: Arc<AtomicBool>,
 		empty: Arc<SCondvar>,
-		sleep: Arc<AtomicBool>,
+		state: Arc<(Mutex<State>, Condvar)>,
+		id: usize,
 	) {
-		while !deleting.load(AtomicOrdering::Acquire) {
+		loop {
+			// check current state.
 			{
-				while sleep.load(AtomicOrdering::SeqCst) {
+				let mut cur_state = state.0.lock();
-					trace!(target: "verification", "Verifier sleeping");
+				while let State::Work(x) = *cur_state {
-					::std::thread::park();
+					// sleep until this thread is required.
-					trace!(target: "verification", "Verifier waking up");
+					if id < x { break }
 
-					if deleting.load(AtomicOrdering::Acquire) {
+					debug!(target: "verification", "verifier {} sleeping", id);
-						return;
+					state.1.wait(&mut cur_state);
+					debug!(target: "verification", "verifier {} waking up", id);					
 				}
+
+				if let State::Exit = *cur_state { 
+					debug!(target: "verification", "verifier {} exiting", id);										
+					break;
 				}
 			}
 
+			// wait for work if empty.
 			{
 				let mut more_to_verify = verification.more_to_verify.lock().unwrap();
 
@@ -305,15 +316,22 @@ impl<K: Kind> VerificationQueue<K> {
 					empty.notify_all();
 				}
 
-				while verification.unverified.lock().is_empty() && !deleting.load(AtomicOrdering::Acquire) {
+				while verification.unverified.lock().is_empty() {
+					if let State::Exit = *state.0.lock() {
+						debug!(target: "verification", "verifier {} exiting", id);
+						return;
+					}
+
 					more_to_verify = wait.wait(more_to_verify).unwrap();
 				}
 
-				if deleting.load(AtomicOrdering::Acquire) {
+				if let State::Exit = *state.0.lock() {
+					debug!(target: "verification", "verifier {} exiting", id);										
 					return;
 				}
 			}
 
+			// do work.
 			let item = {
 				// acquire these locks before getting the item to verify.
 				let mut unverified = verification.unverified.lock();
@@ -568,6 +586,14 @@ impl<K: Kind> VerificationQueue<K> {
 		}
 	}
 
+	/// Get the current number of working verifiers.
+	pub fn num_verifiers(&self) -> usize {
+		match *self.state.0.lock() {
+			State::Work(x) => x,
+			State::Exit => panic!("state only set to exit on drop; queue live now; qed"),
+		}
+	}
+
 	/// Optimise memory footprint of the heap fields, and adjust the number of threads
 	/// to better suit the workload.
 	pub fn collect_garbage(&self) {
@@ -598,13 +624,15 @@ impl<K: Kind> VerificationQueue<K> {
 
 		self.processing.write().shrink_to_fit();
 
+		if !self.scale_verifiers { return }
+
 		if self.ticks_since_adjustment.fetch_add(1, AtomicOrdering::SeqCst) + 1 >= READJUSTMENT_PERIOD {
 			self.ticks_since_adjustment.store(0, AtomicOrdering::SeqCst);
 		} else {
 			return;
 		}
 
-		let current = self.verifiers.lock().1;
+		let current = self.num_verifiers();
 
 		let diff = (v_len - u_len).abs();
 		let total = v_len + u_len;
@@ -626,27 +654,14 @@ impl<K: Kind> VerificationQueue<K> {
 	// possible, never going over the amount of initially allocated threads
 	// or below 1.
 	fn scale_verifiers(&self, target: usize) {
-		let mut verifiers = self.verifiers.lock();
+		let current = self.num_verifiers();
-		let &mut (ref mut verifiers, ref mut verifier_count) = &mut *verifiers;
+		let target = min(self.verifier_handles.len(), target);
-
-		let target = min(verifiers.len(), target);
 		let target = max(1, target);
 
-		debug!(target: "verification", "Scaling from {} to {} verifiers", verifier_count, target);
+		debug!(target: "verification", "Scaling from {} to {} verifiers", current, target);
 
-		// scaling up
+		*self.state.0.lock() = State::Work(target);
-		for i in *verifier_count..target {
+		self.state.1.notify_all();
-			debug!(target: "verification", "Waking up verifier {}", i);
-			verifiers[i].wake_up();
-		}
-
-		// scaling down.
-		for i in target..*verifier_count {
-			debug!(target: "verification", "Putting verifier {} to sleep", i);
-			verifiers[i].sleep();
-		}
-
-		*verifier_count = target;
 	}
 }
 
@@ -660,22 +675,18 @@ impl<K: Kind> Drop for VerificationQueue<K> {
 	fn drop(&mut self) {
 		trace!(target: "shutdown", "[VerificationQueue] Closing...");
 		self.clear();
-		self.deleting.store(true, AtomicOrdering::Release);
+		self.deleting.store(true, AtomicOrdering::SeqCst);
 
-		let mut verifiers = self.verifiers.get_mut();
+		// set exit state; should be done before `more_to_verify` notification.
-		let mut verifiers = &mut verifiers.0;
+		*self.state.0.lock() = State::Exit;
-
+		self.state.1.notify_all();
-		// first pass to signal conclusion. must be done before
-		// notify or deadlock possible.
-		for handle in verifiers.iter() {
-			handle.conclude();
-		}
 
+		// wake up all threads waiting for more work.
 		self.more_to_verify.notify_all();
 
-		// second pass to join.
+		// wait for all verifier threads to join.
-		for handle in verifiers.drain(..) {
+		for thread in self.verifier_handles.drain(..) {
-			handle.join();
+			thread.join().expect("Propagating verifier thread panic on shutdown");
 		}
 
 		trace!(target: "shutdown", "[VerificationQueue] Closed.");
@@ -687,16 +698,21 @@ mod tests {
 	use util::*;
 	use io::*;
 	use spec::*;
-	use super::{BlockQueue, Config};
+	use super::{BlockQueue, Config, State};
 	use super::kind::blocks::Unverified;
 	use tests::helpers::*;
 	use error::*;
 	use views::*;
 
-	fn get_test_queue() -> BlockQueue {
+	// create a test block queue.
+	// auto_scaling enables verifier adjustment.
+	fn get_test_queue(auto_scale: bool) -> BlockQueue {
 		let spec = get_test_spec();
 		let engine = spec.engine;
-		BlockQueue::new(Config::default(), engine, IoChannel::disconnected(), true)
+
+		let mut config = Config::default();
+		config.verifier_settings.scale_verifiers = auto_scale;
+		BlockQueue::new(config, engine, IoChannel::disconnected(), true)
 	}
 
 	#[test]
@@ -709,7 +725,7 @@ mod tests {
 
 	#[test]
 	fn can_import_blocks() {
-		let queue = get_test_queue();
+		let queue = get_test_queue(false);
 		if let Err(e) = queue.import(Unverified::new(get_good_dummy_block())) {
 			panic!("error importing block that is valid by definition({:?})", e);
 		}
@@ -717,7 +733,7 @@ mod tests {
 
 	#[test]
 	fn returns_error_for_duplicates() {
-		let queue = get_test_queue();
+		let queue = get_test_queue(false);
 		if let Err(e) = queue.import(Unverified::new(get_good_dummy_block())) {
 			panic!("error importing block that is valid by definition({:?})", e);
 		}
@@ -736,7 +752,7 @@ mod tests {
 
 	#[test]
 	fn returns_ok_for_drained_duplicates() {
-		let queue = get_test_queue();
+		let queue = get_test_queue(false);
 		let block = get_good_dummy_block();
 		let hash = BlockView::new(&block).header().hash().clone();
 		if let Err(e) = queue.import(Unverified::new(block)) {
@@ -753,7 +769,7 @@ mod tests {
 
 	#[test]
 	fn returns_empty_once_finished() {
-		let queue = get_test_queue();
+		let queue = get_test_queue(false);
 		queue.import(Unverified::new(get_good_dummy_block()))
 			.expect("error importing block that is valid by definition");
 		queue.flush();
@@ -781,30 +797,23 @@ mod tests {
 	fn scaling_limits() {
 		use super::MAX_VERIFIERS;
 
-		let queue = get_test_queue();
+		let queue = get_test_queue(true);
 		queue.scale_verifiers(MAX_VERIFIERS + 1);
 
-		assert!(queue.verifiers.lock().1 < MAX_VERIFIERS + 1);
+		assert!(queue.num_verifiers() < MAX_VERIFIERS + 1);
 
 		queue.scale_verifiers(0);
 
-		assert!(queue.verifiers.lock().1 == 1);
+		assert!(queue.num_verifiers() == 1);
 	}
 
 	#[test]
 	fn readjust_verifiers() {
-		let queue = get_test_queue();
+		let queue = get_test_queue(true);
 
 		// put all the verifiers to sleep to ensure 
 		// the test isn't timing sensitive.
-		let num_verifiers = {
+		*queue.state.0.lock() = State::Work(0);
-			let verifiers = queue.verifiers.lock();
-			for i in 0..verifiers.1 {
-				verifiers.0[i].sleep();
-			}
-
-			verifiers.1
-		};
 
 		for block in get_good_dummy_block_seq(5000) {
 			queue.import(Unverified::new(block)).expect("Block good by definition; qed");
@@ -812,20 +821,12 @@ mod tests {
 
 		// almost all unverified == bump verifier count.
 		queue.collect_garbage();
-		assert_eq!(queue.verifiers.lock().1, num_verifiers + 1);
+		assert_eq!(queue.num_verifiers(), 1);
-
-		// wake them up again and verify everything.
-		{
-			let verifiers = queue.verifiers.lock();
-			for i in 0..verifiers.1 {
-				verifiers.0[i].wake_up();
-			}
-		}
 
 		queue.flush();
 
 		// nothing to verify == use minimum number of verifiers.
 		queue.collect_garbage();
-		assert_eq!(queue.verifiers.lock().1, 1);
+		assert_eq!(queue.num_verifiers(), 1);
 	}
 }

js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "parity.js",
-  "version": "0.2.91",
+  "version": "0.2.97",
   "main": "release/index.js",
   "jsnext:main": "src/index.js",
   "author": "Parity Team <admin@parity.io>",

js/src/api/contract/contract.js

@@ -189,15 +189,21 @@ export default class Contract {
     });
   }
 
-  _encodeOptions (func, options, values) {
+  getCallData = (func, options, values) => {
+    let data = options.data;
+
     const tokens = func ? this._abi.encodeTokens(func.inputParamTypes(), values) : null;
     const call = tokens ? func.encodeCall(tokens) : null;
 
-    if (options.data && options.data.substr(0, 2) === '0x') {
+    if (data && data.substr(0, 2) === '0x') {
-      options.data = options.data.substr(2);
+      data = data.substr(2);
     }
-    options.data = `0x${options.data || ''}${call || ''}`;
 
+    return `0x${data || ''}${call || ''}`;
+  }
+
+  _encodeOptions (func, options, values) {
+    options.data = this.getCallData(func, options, values);
     return options;
   }
 
@@ -209,8 +215,10 @@ export default class Contract {
 
   _bindFunction = (func) => {
     func.call = (options, values = []) => {
+      const callParams = this._encodeOptions(func, this._addOptionsTo(options), values);
+
       return this._api.eth
-        .call(this._encodeOptions(func, this._addOptionsTo(options), values))
+        .call(callParams)
         .then((encoded) => func.decodeOutput(encoded))
         .then((tokens) => tokens.map((token) => token.value))
         .then((returns) => returns.length === 1 ? returns[0] : returns);

js/src/api/rpc/parity/parity.js

@@ -128,6 +128,11 @@ export default class Parity {
       .execute('parity_killAccount', inAddress(account), password);
   }
 
+  removeAddress (address) {
+    return this._transport
+      .execute('parity_removeAddress', inAddress(address));
+  }
+
   listGethAccounts () {
     return this._transport
       .execute('parity_listGethAccounts')

js/src/contracts/code/index.js

@@ -0,0 +1,21 @@
+// 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 wallet from './wallet';
+
+export {
+  wallet
+};

js/src/contracts/snippets/wallet.sol

@@ -0,0 +1,388 @@
+//sol Wallet
+// Multi-sig, daily-limited account proxy/wallet.
+// @authors:
+// Gav Wood <g@ethdev.com>
+// inheritable "property" contract that enables methods to be protected by requiring the acquiescence of either a
+// single, or, crucially, each of a number of, designated owners.
+// usage:
+// use modifiers onlyowner (just own owned) or onlymanyowners(hash), whereby the same hash must be provided by
+// some number (specified in constructor) of the set of owners (specified in the constructor, modifiable) before the
+// interior is executed.
+pragma solidity ^0.4.6;
+
+contract multiowned {
+
+    // TYPES
+
+    // struct for the status of a pending operation.
+    struct PendingState {
+        uint yetNeeded;
+        uint ownersDone;
+        uint index;
+    }
+
+    // EVENTS
+
+    // this contract only has six types of events: it can accept a confirmation, in which case
+    // we record owner and operation (hash) alongside it.
+    event Confirmation(address owner, bytes32 operation);
+    event Revoke(address owner, bytes32 operation);
+    // some others are in the case of an owner changing.
+    event OwnerChanged(address oldOwner, address newOwner);
+    event OwnerAdded(address newOwner);
+    event OwnerRemoved(address oldOwner);
+    // the last one is emitted if the required signatures change
+    event RequirementChanged(uint newRequirement);
+
+    // MODIFIERS
+
+    // simple single-sig function modifier.
+    modifier onlyowner {
+        if (isOwner(msg.sender))
+            _;
+    }
+    // multi-sig function modifier: the operation must have an intrinsic hash in order
+    // that later attempts can be realised as the same underlying operation and
+    // thus count as confirmations.
+    modifier onlymanyowners(bytes32 _operation) {
+        if (confirmAndCheck(_operation))
+            _;
+    }
+
+    // METHODS
+
+    // constructor is given number of sigs required to do protected "onlymanyowners" transactions
+    // as well as the selection of addresses capable of confirming them.
+    function multiowned(address[] _owners, uint _required) {
+        m_numOwners = _owners.length + 1;
+        m_owners[1] = uint(msg.sender);
+        m_ownerIndex[uint(msg.sender)] = 1;
+        for (uint i = 0; i < _owners.length; ++i)
+        {
+            m_owners[2 + i] = uint(_owners[i]);
+            m_ownerIndex[uint(_owners[i])] = 2 + i;
+        }
+        m_required = _required;
+    }
+
+    // Revokes a prior confirmation of the given operation
+    function revoke(bytes32 _operation) external {
+        uint ownerIndex = m_ownerIndex[uint(msg.sender)];
+        // make sure they're an owner
+        if (ownerIndex == 0) return;
+        uint ownerIndexBit = 2**ownerIndex;
+        var pending = m_pending[_operation];
+        if (pending.ownersDone & ownerIndexBit > 0) {
+            pending.yetNeeded++;
+            pending.ownersDone -= ownerIndexBit;
+            Revoke(msg.sender, _operation);
+        }
+    }
+
+    // Replaces an owner `_from` with another `_to`.
+    function changeOwner(address _from, address _to) onlymanyowners(sha3(msg.data)) external {
+        if (isOwner(_to)) return;
+        uint ownerIndex = m_ownerIndex[uint(_from)];
+        if (ownerIndex == 0) return;
+
+        clearPending();
+        m_owners[ownerIndex] = uint(_to);
+        m_ownerIndex[uint(_from)] = 0;
+        m_ownerIndex[uint(_to)] = ownerIndex;
+        OwnerChanged(_from, _to);
+    }
+
+    function addOwner(address _owner) onlymanyowners(sha3(msg.data)) external {
+        if (isOwner(_owner)) return;
+
+        clearPending();
+        if (m_numOwners >= c_maxOwners)
+            reorganizeOwners();
+        if (m_numOwners >= c_maxOwners)
+            return;
+        m_numOwners++;
+        m_owners[m_numOwners] = uint(_owner);
+        m_ownerIndex[uint(_owner)] = m_numOwners;
+        OwnerAdded(_owner);
+    }
+
+    function removeOwner(address _owner) onlymanyowners(sha3(msg.data)) external {
+        uint ownerIndex = m_ownerIndex[uint(_owner)];
+        if (ownerIndex == 0) return;
+        if (m_required > m_numOwners - 1) return;
+
+        m_owners[ownerIndex] = 0;
+        m_ownerIndex[uint(_owner)] = 0;
+        clearPending();
+        reorganizeOwners(); //make sure m_numOwner is equal to the number of owners and always points to the optimal free slot
+        OwnerRemoved(_owner);
+    }
+
+    function changeRequirement(uint _newRequired) onlymanyowners(sha3(msg.data)) external {
+        if (_newRequired > m_numOwners) return;
+        m_required = _newRequired;
+        clearPending();
+        RequirementChanged(_newRequired);
+    }
+
+    // Gets an owner by 0-indexed position (using numOwners as the count)
+    function getOwner(uint ownerIndex) external constant returns (address) {
+        return address(m_owners[ownerIndex + 1]);
+    }
+
+    function isOwner(address _addr) returns (bool) {
+        return m_ownerIndex[uint(_addr)] > 0;
+    }
+
+    function hasConfirmed(bytes32 _operation, address _owner) constant returns (bool) {
+        var pending = m_pending[_operation];
+        uint ownerIndex = m_ownerIndex[uint(_owner)];
+
+        // make sure they're an owner
+        if (ownerIndex == 0) return false;
+
+        // determine the bit to set for this owner.
+        uint ownerIndexBit = 2**ownerIndex;
+        return !(pending.ownersDone & ownerIndexBit == 0);
+    }
+
+    // INTERNAL METHODS
+
+    function confirmAndCheck(bytes32 _operation) internal returns (bool) {
+        // determine what index the present sender is:
+        uint ownerIndex = m_ownerIndex[uint(msg.sender)];
+        // make sure they're an owner
+        if (ownerIndex == 0) return;
+
+        var pending = m_pending[_operation];
+        // if we're not yet working on this operation, switch over and reset the confirmation status.
+        if (pending.yetNeeded == 0) {
+            // reset count of confirmations needed.
+            pending.yetNeeded = m_required;
+            // reset which owners have confirmed (none) - set our bitmap to 0.
+            pending.ownersDone = 0;
+            pending.index = m_pendingIndex.length++;
+            m_pendingIndex[pending.index] = _operation;
+        }
+        // determine the bit to set for this owner.
+        uint ownerIndexBit = 2**ownerIndex;
+        // make sure we (the message sender) haven't confirmed this operation previously.
+        if (pending.ownersDone & ownerIndexBit == 0) {
+            Confirmation(msg.sender, _operation);
+            // ok - check if count is enough to go ahead.
+            if (pending.yetNeeded <= 1) {
+                // enough confirmations: reset and run interior.
+                delete m_pendingIndex[m_pending[_operation].index];
+                delete m_pending[_operation];
+                return true;
+            }
+            else
+            {
+                // not enough: record that this owner in particular confirmed.
+                pending.yetNeeded--;
+                pending.ownersDone |= ownerIndexBit;
+            }
+        }
+    }
+
+    function reorganizeOwners() private {
+        uint free = 1;
+        while (free < m_numOwners)
+        {
+            while (free < m_numOwners && m_owners[free] != 0) free++;
+            while (m_numOwners > 1 && m_owners[m_numOwners] == 0) m_numOwners--;
+            if (free < m_numOwners && m_owners[m_numOwners] != 0 && m_owners[free] == 0)
+            {
+                m_owners[free] = m_owners[m_numOwners];
+                m_ownerIndex[m_owners[free]] = free;
+                m_owners[m_numOwners] = 0;
+            }
+        }
+    }
+
+    function clearPending() internal {
+        uint length = m_pendingIndex.length;
+        for (uint i = 0; i < length; ++i)
+            if (m_pendingIndex[i] != 0)
+                delete m_pending[m_pendingIndex[i]];
+        delete m_pendingIndex;
+    }
+
+    // FIELDS
+
+    // the number of owners that must confirm the same operation before it is run.
+    uint public m_required;
+    // pointer used to find a free slot in m_owners
+    uint public m_numOwners;
+
+    // list of owners
+    uint[256] m_owners;
+    uint constant c_maxOwners = 250;
+    // index on the list of owners to allow reverse lookup
+    mapping(uint => uint) m_ownerIndex;
+    // the ongoing operations.
+    mapping(bytes32 => PendingState) m_pending;
+    bytes32[] m_pendingIndex;
+}
+
+// inheritable "property" contract that enables methods to be protected by placing a linear limit (specifiable)
+// on a particular resource per calendar day. is multiowned to allow the limit to be altered. resource that method
+// uses is specified in the modifier.
+contract daylimit is multiowned {
+
+    // MODIFIERS
+
+    // simple modifier for daily limit.
+    modifier limitedDaily(uint _value) {
+        if (underLimit(_value))
+            _;
+    }
+
+    // METHODS
+
+    // constructor - stores initial daily limit and records the present day's index.
+    function daylimit(uint _limit) {
+        m_dailyLimit = _limit;
+        m_lastDay = today();
+    }
+    // (re)sets the daily limit. needs many of the owners to confirm. doesn't alter the amount already spent today.
+    function setDailyLimit(uint _newLimit) onlymanyowners(sha3(msg.data)) external {
+        m_dailyLimit = _newLimit;
+    }
+    // resets the amount already spent today. needs many of the owners to confirm.
+    function resetSpentToday() onlymanyowners(sha3(msg.data)) external {
+        m_spentToday = 0;
+    }
+
+    // INTERNAL METHODS
+
+    // checks to see if there is at least `_value` left from the daily limit today. if there is, subtracts it and
+    // returns true. otherwise just returns false.
+    function underLimit(uint _value) internal onlyowner returns (bool) {
+        // reset the spend limit if we're on a different day to last time.
+        if (today() > m_lastDay) {
+            m_spentToday = 0;
+            m_lastDay = today();
+        }
+        // check to see if there's enough left - if so, subtract and return true.
+        // overflow protection                    // dailyLimit check
+        if (m_spentToday + _value >= m_spentToday && m_spentToday + _value <= m_dailyLimit) {
+            m_spentToday += _value;
+            return true;
+        }
+        return false;
+    }
+    // determines today's index.
+    function today() private constant returns (uint) { return now / 1 days; }
+
+    // FIELDS
+
+    uint public m_dailyLimit;
+    uint public m_spentToday;
+    uint public m_lastDay;
+}
+
+// interface contract for multisig proxy contracts; see below for docs.
+contract multisig {
+
+    // EVENTS
+
+    // logged events:
+    // Funds has arrived into the wallet (record how much).
+    event Deposit(address _from, uint value);
+    // Single transaction going out of the wallet (record who signed for it, how much, and to whom it's going).
+    event SingleTransact(address owner, uint value, address to, bytes data);
+    // Multi-sig transaction going out of the wallet (record who signed for it last, the operation hash, how much, and to whom it's going).
+    event MultiTransact(address owner, bytes32 operation, uint value, address to, bytes data);
+    // Confirmation still needed for a transaction.
+    event ConfirmationNeeded(bytes32 operation, address initiator, uint value, address to, bytes data);
+
+    // FUNCTIONS
+
+    // TODO: document
+    function changeOwner(address _from, address _to) external;
+    function execute(address _to, uint _value, bytes _data) external returns (bytes32);
+    function confirm(bytes32 _h) returns (bool);
+}
+
+// usage:
+// bytes32 h = Wallet(w).from(oneOwner).execute(to, value, data);
+// Wallet(w).from(anotherOwner).confirm(h);
+contract Wallet is multisig, multiowned, daylimit {
+
+    // TYPES
+
+    // Transaction structure to remember details of transaction lest it need be saved for a later call.
+    struct Transaction {
+        address to;
+        uint value;
+        bytes data;
+    }
+
+    // METHODS
+
+    // constructor - just pass on the owner array to the multiowned and
+    // the limit to daylimit
+    function Wallet(address[] _owners, uint _required, uint _daylimit)
+            multiowned(_owners, _required) daylimit(_daylimit) {
+    }
+
+    // kills the contract sending everything to `_to`.
+    function kill(address _to) onlymanyowners(sha3(msg.data)) external {
+        suicide(_to);
+    }
+
+    // gets called when no other function matches
+    function() payable {
+        // just being sent some cash?
+        if (msg.value > 0)
+            Deposit(msg.sender, msg.value);
+    }
+
+    // Outside-visible transact entry point. Executes transaction immediately if below daily spend limit.
+    // If not, goes into multisig process. We provide a hash on return to allow the sender to provide
+    // shortcuts for the other confirmations (allowing them to avoid replicating the _to, _value
+    // and _data arguments). They still get the option of using them if they want, anyways.
+    function execute(address _to, uint _value, bytes _data) external onlyowner returns (bytes32 _r) {
+        // first, take the opportunity to check that we're under the daily limit.
+        if (underLimit(_value)) {
+            SingleTransact(msg.sender, _value, _to, _data);
+            // yes - just execute the call.
+            _to.call.value(_value)(_data);
+            return 0;
+        }
+        // determine our operation hash.
+        _r = sha3(msg.data, block.number);
+        if (!confirm(_r) && m_txs[_r].to == 0) {
+            m_txs[_r].to = _to;
+            m_txs[_r].value = _value;
+            m_txs[_r].data = _data;
+            ConfirmationNeeded(_r, msg.sender, _value, _to, _data);
+        }
+    }
+
+    // confirm a transaction through just the hash. we use the previous transactions map, m_txs, in order
+    // to determine the body of the transaction from the hash provided.
+    function confirm(bytes32 _h) onlymanyowners(_h) returns (bool) {
+        if (m_txs[_h].to != 0) {
+            m_txs[_h].to.call.value(m_txs[_h].value)(m_txs[_h].data);
+            MultiTransact(msg.sender, _h, m_txs[_h].value, m_txs[_h].to, m_txs[_h].data);
+            delete m_txs[_h];
+            return true;
+        }
+    }
+
+    // INTERNAL METHODS
+
+    function clearPending() internal {
+        uint length = m_pendingIndex.length;
+        for (uint i = 0; i < length; ++i)
+            delete m_txs[m_pendingIndex[i]];
+        super.clearPending();
+    }
+
+    // FIELDS
+
+    // pending transactions we have at present.
+    mapping (bytes32 => Transaction) m_txs;
+}

js/src/dapps/registry/Application/application.js

@@ -21,6 +21,9 @@ const muiTheme = getMuiTheme(lightBaseTheme);
 
 import CircularProgress from 'material-ui/CircularProgress';
 import { Card, CardText } from 'material-ui/Card';
+
+import { nullableProptype } from '~/util/proptypes';
+
 import styles from './application.css';
 import Accounts from '../Accounts';
 import Events from '../Events';
@@ -28,8 +31,6 @@ import Lookup from '../Lookup';
 import Names from '../Names';
 import Records from '../Records';
 
-const nullable = (type) => React.PropTypes.oneOfType([ React.PropTypes.oneOf([ null ]), type ]);
-
 export default class Application extends Component {
   static childContextTypes = {
     muiTheme: PropTypes.object.isRequired,
@@ -44,8 +45,8 @@ export default class Application extends Component {
     actions: PropTypes.object.isRequired,
     accounts: PropTypes.object.isRequired,
     contacts: PropTypes.object.isRequired,
-    contract: nullable(PropTypes.object.isRequired),
+    contract: nullableProptype(PropTypes.object.isRequired),
-    fee: nullable(PropTypes.object.isRequired),
+    fee: nullableProptype(PropTypes.object.isRequired),
     lookup: PropTypes.object.isRequired,
     events: PropTypes.object.isRequired,
     names: PropTypes.object.isRequired,

js/src/dapps/registry/Container.js

@@ -18,19 +18,19 @@ import React, { Component, PropTypes } from 'react';
 import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
 
+import { nullableProptype } from '~/util/proptypes';
+
 import Application from './Application';
 import * as actions from './actions';
 
-const nullable = (type) => React.PropTypes.oneOfType([ React.PropTypes.oneOf([ null ]), type ]);
-
 class Container extends Component {
   static propTypes = {
     actions: PropTypes.object.isRequired,
     accounts: PropTypes.object.isRequired,
     contacts: PropTypes.object.isRequired,
-    contract: nullable(PropTypes.object.isRequired),
+    contract: nullableProptype(PropTypes.object.isRequired),
-    owner: nullable(PropTypes.string.isRequired),
+    owner: nullableProptype(PropTypes.string.isRequired),
-    fee: nullable(PropTypes.object.isRequired),
+    fee: nullableProptype(PropTypes.object.isRequired),
     lookup: PropTypes.object.isRequired,
     events: PropTypes.object.isRequired
   };

js/src/dapps/registry/Lookup/lookup.js

@@ -19,21 +19,22 @@ import { Card, CardHeader, CardText } from 'material-ui/Card';
 import TextField from 'material-ui/TextField';
 import RaisedButton from 'material-ui/RaisedButton';
 import SearchIcon from 'material-ui/svg-icons/action/search';
+
+import { nullableProptype } from '~/util/proptypes';
+
 import renderAddress from '../ui/address.js';
 import renderImage from '../ui/image.js';
 
 import recordTypeSelect from '../ui/record-type-select.js';
 import styles from './lookup.css';
 
-const nullable = (type) => React.PropTypes.oneOfType([ React.PropTypes.oneOf([ null ]), type ]);
-
 export default class Lookup extends Component {
 
   static propTypes = {
     actions: PropTypes.object.isRequired,
     name: PropTypes.string.isRequired,
     type: PropTypes.string.isRequired,
-    result: nullable(PropTypes.string.isRequired),
+    result: nullableProptype(PropTypes.string.isRequired),
     accounts: PropTypes.object.isRequired,
     contacts: PropTypes.object.isRequired
   }

js/src/dapps/registry/Records/records.js

@@ -1,3 +1,19 @@
+// 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, { Component, PropTypes } from 'react';
 import { Card, CardHeader, CardText } from 'material-ui/Card';
 import TextField from 'material-ui/TextField';

js/src/jsonrpc/interfaces/parity.js

@@ -256,6 +256,20 @@ export default {
     }
   },
 
+  removeAddress: {
+    desc: 'Removes an address from the addressbook',
+    params: [
+      {
+        type: Address,
+        desc: 'The address to remove'
+      }
+    ],
+    returns: {
+      type: Boolean,
+      desc: 'true on success'
+    }
+  },
+
   listGethAccounts: {
     desc: 'Returns a list of the accounts available from Geth',
     params: [],

js/src/main.js

@@ -17,7 +17,7 @@
 import React, { Component, PropTypes } from 'react';
 import { Redirect, Router, Route } from 'react-router';
 
-import { Accounts, Account, Addresses, Address, Application, Contract, Contracts, WriteContract, Dapp, Dapps, Settings, SettingsBackground, SettingsParity, SettingsProxy, SettingsViews, Signer, Status } from '~/views';
+import { Accounts, Account, Addresses, Address, Application, Contract, Contracts, WriteContract, Wallet, Dapp, Dapps, Settings, SettingsBackground, SettingsParity, SettingsProxy, SettingsViews, Signer, Status } from '~/views';
 
 import styles from './reset.css';
 
@@ -37,6 +37,7 @@ export default class MainApplication extends Component {
         <Route path='/' component={ Application }>
           <Route path='accounts' component={ Accounts } />
           <Route path='account/:address' component={ Account } />
+          <Route path='wallet/:address' component={ Wallet } />
           <Route path='addresses' component={ Addresses } />
           <Route path='address/:address' component={ Address } />
           <Route path='apps' component={ Dapps } />

js/src/modals/CreateAccount/NewAccount/newAccount.js

@@ -192,8 +192,6 @@ export default class CreateAccount extends Component {
               };
             });
 
-            console.log(accounts);
-
             this.setState({
               selectedAddress: addresses[0],
               accounts: accounts
@@ -201,8 +199,7 @@ export default class CreateAccount extends Component {
           });
       })
       .catch((error) => {
-        console.log('createIdentities', error);
+        console.error('createIdentities', error);
-
         setTimeout(this.createIdentities, 1000);
         this.newError(error);
       });

js/src/modals/CreateWallet/WalletDetails/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 './walletDetails';

js/src/modals/CreateWallet/WalletDetails/walletDetails.js

@@ -0,0 +1,162 @@
+// 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, { Component, PropTypes } from 'react';
+
+import { Form, TypedInput, Input, AddressSelect, InputAddress } from '~/ui';
+import { parseAbiType } from '~/util/abi';
+
+import styles from '../createWallet.css';
+
+export default class WalletDetails extends Component {
+  static propTypes = {
+    accounts: PropTypes.object.isRequired,
+    wallet: PropTypes.object.isRequired,
+    errors: PropTypes.object.isRequired,
+    onChange: PropTypes.func.isRequired,
+    walletType: PropTypes.string.isRequired
+  };
+
+  render () {
+    const { walletType } = this.props;
+
+    if (walletType === 'WATCH') {
+      return this.renderWatchDetails();
+    }
+
+    return this.renderMultisigDetails();
+  }
+
+  renderWatchDetails () {
+    const { wallet, errors } = this.props;
+
+    return (
+      <Form>
+        <InputAddress
+          label='wallet address'
+          hint='the wallet contract address'
+          value={ wallet.address }
+          error={ errors.address }
+          onChange={ this.onAddressChange }
+        />
+
+        <Input
+          label='wallet name'
+          hint='the local name for this wallet'
+          value={ wallet.name }
+          error={ errors.name }
+          onChange={ this.onNameChange }
+        />
+
+        <Input
+          label='wallet description (optional)'
+          hint='the local description for this wallet'
+          value={ wallet.description }
+          onChange={ this.onDescriptionChange }
+        />
+      </Form>
+    );
+  }
+
+  renderMultisigDetails () {
+    const { accounts, wallet, errors } = this.props;
+
+    return (
+      <Form>
+        <AddressSelect
+          label='from account (contract owner)'
+          hint='the owner account for this contract'
+          value={ wallet.account }
+          error={ errors.account }
+          onChange={ this.onAccoutChange }
+          accounts={ accounts }
+        />
+
+        <Input
+          label='wallet name'
+          hint='the local name for this wallet'
+          value={ wallet.name }
+          error={ errors.name }
+          onChange={ this.onNameChange }
+        />
+
+        <Input
+          label='wallet description (optional)'
+          hint='the local description for this wallet'
+          value={ wallet.description }
+          onChange={ this.onDescriptionChange }
+        />
+
+        <TypedInput
+          label='other wallet owners'
+          value={ wallet.owners.slice() }
+          onChange={ this.onOwnersChange }
+          accounts={ accounts }
+          param={ parseAbiType('address[]') }
+        />
+
+        <div className={ styles.splitInput }>
+          <TypedInput
+            label='required owners'
+            hint='number of required owners to accept a transaction'
+            value={ wallet.required }
+            error={ errors.required }
+            onChange={ this.onRequiredChange }
+            param={ parseAbiType('uint') }
+            min={ 1 }
+          />
+
+          <TypedInput
+            label='wallet day limit'
+            hint='number of days to wait for other owners confirmation'
+            value={ wallet.daylimit }
+            error={ errors.daylimit }
+            onChange={ this.onDaylimitChange }
+            param={ parseAbiType('uint') }
+          />
+        </div>
+      </Form>
+    );
+  }
+
+  onAddressChange = (_, address) => {
+    this.props.onChange({ address });
+  }
+
+  onAccoutChange = (_, account) => {
+    this.props.onChange({ account });
+  }
+
+  onNameChange = (_, name) => {
+    this.props.onChange({ name });
+  }
+
+  onDescriptionChange = (_, description) => {
+    this.props.onChange({ description });
+  }
+
+  onOwnersChange = (owners) => {
+    this.props.onChange({ owners });
+  }
+
+  onRequiredChange = (required) => {
+    this.props.onChange({ required });
+  }
+
+  onDaylimitChange = (daylimit) => {
+    this.props.onChange({ daylimit });
+  }
+}

js/src/modals/CreateWallet/WalletInfo/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 './walletInfo';

js/src/modals/CreateWallet/WalletInfo/walletInfo.js

@@ -0,0 +1,91 @@
+// 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, { Component, PropTypes } from 'react';
+
+import { CompletedStep, IdentityIcon, CopyToClipboard } from '~/ui';
+
+import styles from '../createWallet.css';
+
+export default class WalletInfo extends Component {
+  static propTypes = {
+    accounts: PropTypes.object.isRequired,
+    account: PropTypes.string.isRequired,
+    name: PropTypes.string.isRequired,
+    address: PropTypes.string.isRequired,
+    owners: PropTypes.array.isRequired,
+    required: PropTypes.oneOfType([
+      PropTypes.string,
+      PropTypes.number
+    ]).isRequired,
+    daylimit: PropTypes.oneOfType([
+      PropTypes.string,
+      PropTypes.number
+    ]).isRequired,
+
+    deployed: PropTypes.bool
+  };
+
+  render () {
+    const { address, required, daylimit, name, deployed } = this.props;
+
+    return (
+      <CompletedStep>
+        <div>
+          <code>{ name }</code>
+          <span> has been </span>
+          <span> { deployed ? 'deployed' : 'added' } at </span>
+        </div>
+        <div>
+          <CopyToClipboard data={ address } label='copy address to clipboard' />
+          <IdentityIcon address={ address } inline center className={ styles.identityicon } />
+          <div className={ styles.address }>{ address }</div>
+        </div>
+        <div>with the following owners</div>
+        <div>
+          { this.renderOwners() }
+        </div>
+        <p>
+          <code>{ required }</code> owners are required to confirm a transaction.
+        </p>
+        <p>
+          The daily limit is set to <code>{ daylimit }</code>.
+        </p>
+      </CompletedStep>
+    );
+  }
+
+  renderOwners () {
+    const { account, owners, deployed } = this.props;
+
+    return [].concat(deployed ? account : null, owners).filter((a) => a).map((address, id) => (
+      <div key={ id } className={ styles.owner }>
+        <IdentityIcon address={ address } inline center className={ styles.identityicon } />
+        <div className={ styles.address }>{ this.addressToString(address) }</div>
+      </div>
+    ));
+  }
+
+  addressToString (address) {
+    const { accounts } = this.props;
+
+    if (accounts[address]) {
+      return accounts[address].name || address;
+    }
+
+    return address;
+  }
+}

js/src/modals/CreateWallet/WalletType/index.js

@@ -1,19 +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/>.extern crate libc;
 
-extern crate libc;
+// You should have received a copy of the GNU General Public License
-mod raise_fd_limit;
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
-pub use raise_fd_limit::raise_fd_limit;
+
+export default from './walletType.js';

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

@@ -0,0 +1,58 @@
+// 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, { Component, PropTypes } from 'react';
+
+import { RadioButtons } from '~/ui';
+
+// import styles from '../createWallet.css';
+
+export default class WalletType extends Component {
+  static propTypes = {
+    onChange: PropTypes.func.isRequired,
+    type: PropTypes.string.isRequired
+  };
+
+  render () {
+    const { type } = this.props;
+
+    return (
+      <RadioButtons
+        name='contractType'
+        value={ type }
+        values={ this.getTypes() }
+        onChange={ this.onTypeChange }
+      />
+    );
+  }
+
+  getTypes () {
+    return [
+      {
+        label: 'Multi-Sig wallet', key: 'MULTISIG',
+        description: 'A standard multi-signature Wallet'
+      },
+      {
+        label: 'Watch a wallet', key: 'WATCH',
+        description: 'Add an existing wallet to your accounts'
+      }
+    ];
+  }
+
+  onTypeChange = (type) => {
+    this.props.onChange(type.key);
+  }
+}

js/src/modals/CreateWallet/createWallet.css

@@ -0,0 +1,58 @@
+/* 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/>.
+*/
+
+.address {
+  vertical-align: top;
+  display: inline-block;
+}
+
+.identityicon {
+  margin: -8px 0.5em;
+}
+
+.owner {
+  height: 40px;
+  color: lightgrey;
+
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  .identityicon {
+    width: 24px;
+    height: 24px;
+  }
+}
+
+.splitInput {
+  display: flex;
+  flex-direction: row;
+
+  > * {
+    flex: 1;
+
+    margin: 0 0.25em;
+
+    &:first-child {
+      margin-left: 0;
+    }
+
+    &:last-child {
+      margin-right: 0;
+    }
+  }
+}

js/src/modals/CreateWallet/createWallet.js

@@ -0,0 +1,214 @@
+// 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, { Component, PropTypes } from 'react';
+import { observer } from 'mobx-react';
+
+import ActionDone from 'material-ui/svg-icons/action/done';
+import ContentClear from 'material-ui/svg-icons/content/clear';
+import NavigationArrowForward from 'material-ui/svg-icons/navigation/arrow-forward';
+
+import { Button, Modal, TxHash, BusyStep } from '~/ui';
+
+import WalletType from './WalletType';
+import WalletDetails from './WalletDetails';
+import WalletInfo from './WalletInfo';
+import CreateWalletStore from './createWalletStore';
+// import styles from './createWallet.css';
+
+@observer
+export default class CreateWallet extends Component {
+  static contextTypes = {
+    api: PropTypes.object.isRequired
+  };
+
+  static propTypes = {
+    accounts: PropTypes.object.isRequired,
+    onClose: PropTypes.func.isRequired
+  };
+
+  store = new CreateWalletStore(this.context.api, this.props.accounts);
+
+  render () {
+    const { stage, steps, waiting, rejected } = this.store;
+
+    if (rejected) {
+      return (
+        <Modal
+          visible
+          title='rejected'
+          actions={ this.renderDialogActions() }
+        >
+          <BusyStep
+            title='The deployment has been rejected'
+            state='The wallet will not be created. You can safely close this window.'
+          />
+        </Modal>
+      );
+    }
+
+    return (
+      <Modal
+        visible
+        actions={ this.renderDialogActions() }
+        current={ stage }
+        steps={ steps.map((s) => s.title) }
+        waiting={ waiting }
+      >
+        { this.renderPage() }
+      </Modal>
+    );
+  }
+
+  renderPage () {
+    const { step } = this.store;
+    const { accounts } = this.props;
+
+    switch (step) {
+      case 'DEPLOYMENT':
+        return (
+          <BusyStep
+            title='The deployment is currently in progress'
+            state={ this.store.deployState }
+          >
+            { this.store.txhash ? (<TxHash hash={ this.store.txhash } />) : null }
+          </BusyStep>
+        );
+
+      case 'INFO':
+        return (
+          <WalletInfo
+            accounts={ accounts }
+
+            account={ this.store.wallet.account }
+            address={ this.store.wallet.address }
+            owners={ this.store.wallet.owners.slice() }
+            required={ this.store.wallet.required }
+            daylimit={ this.store.wallet.daylimit }
+            name={ this.store.wallet.name }
+
+            deployed={ this.store.deployed }
+          />
+        );
+
+      case 'DETAILS':
+        return (
+          <WalletDetails
+            accounts={ accounts }
+            wallet={ this.store.wallet }
+            errors={ this.store.errors }
+            walletType={ this.store.walletType }
+            onChange={ this.store.onChange }
+          />
+        );
+
+      default:
+      case 'TYPE':
+        return (
+          <WalletType
+            onChange={ this.store.onTypeChange }
+            type={ this.store.walletType }
+          />
+        );
+    }
+  }
+
+  renderDialogActions () {
+    const { step, hasErrors, rejected, onCreate, onNext, onAdd } = this.store;
+
+    const cancelBtn = (
+      <Button
+        icon={ <ContentClear /> }
+        label='Cancel'
+        onClick={ this.onClose }
+      />
+    );
+
+    const closeBtn = (
+      <Button
+        icon={ <ContentClear /> }
+        label='Close'
+        onClick={ this.onClose }
+      />
+    );
+
+    const doneBtn = (
+      <Button
+        icon={ <ActionDone /> }
+        label='Done'
+        onClick={ this.onClose }
+      />
+    );
+
+    const sendingBtn = (
+      <Button
+        icon={ <ActionDone /> }
+        label='Sending...'
+        disabled
+      />
+    );
+
+    const nextBtn = (
+      <Button
+        icon={ <NavigationArrowForward /> }
+        label='Next'
+        onClick={ onNext }
+      />
+    );
+
+    if (rejected) {
+      return [ closeBtn ];
+    }
+
+    switch (step) {
+      case 'DEPLOYMENT':
+        return [ closeBtn, sendingBtn ];
+
+      case 'INFO':
+        return [ doneBtn ];
+
+      case 'DETAILS':
+        if (this.store.walletType === 'WATCH') {
+          return [ cancelBtn, (
+            <Button
+              icon={ <NavigationArrowForward /> }
+              label='Add'
+              disabled={ hasErrors }
+              onClick={ onAdd }
+            />
+          ) ];
+        }
+
+        return [ cancelBtn, (
+          <Button
+            icon={ <NavigationArrowForward /> }
+            label='Create'
+            disabled={ hasErrors }
+            onClick={ onCreate }
+          />
+        ) ];
+
+      default:
+      case 'TYPE':
+        return [ cancelBtn, nextBtn ];
+
+    }
+  }
+
+  onClose = () => {
+    this.props.onClose();
+  }
+}

js/src/modals/CreateWallet/createWalletStore.js

@@ -0,0 +1,272 @@
+// 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 { observable, computed, action, transaction } from 'mobx';
+
+import { validateUint, validateAddress, validateName } from '../../util/validation';
+import { ERROR_CODES } from '~/api/transport/error';
+
+import Contract from '~/api/contract';
+import { wallet as walletAbi } from '~/contracts/abi';
+import { wallet as walletCode } from '~/contracts/code';
+
+import WalletsUtils from '~/util/wallets';
+
+const STEPS = {
+  TYPE: { title: 'wallet type' },
+  DETAILS: { title: 'wallet details' },
+  DEPLOYMENT: { title: 'wallet deployment', waiting: true },
+  INFO: { title: 'wallet informaton' }
+};
+
+export default class CreateWalletStore {
+  @observable step = null;
+  @observable rejected = false;
+
+  @observable deployState = null;
+  @observable deployError = null;
+  @observable deployed = false;
+
+  @observable txhash = null;
+
+  @observable wallet = {
+    account: '',
+    address: '',
+    owners: [],
+    required: 1,
+    daylimit: 0,
+
+    name: '',
+    description: ''
+  };
+  @observable walletType = 'MULTISIG';
+
+  @observable errors = {
+    account: null,
+    address: null,
+    owners: null,
+    required: null,
+    daylimit: null,
+    name: null
+  };
+
+  @computed get stage () {
+    return this.stepsKeys.findIndex((k) => k === this.step);
+  }
+
+  @computed get hasErrors () {
+    return !!Object.keys(this.errors)
+      .filter((errorKey) => {
+        if (this.walletType === 'WATCH') {
+          return ['address', 'name'].includes(errorKey);
+        }
+
+        return errorKey !== 'address';
+      })
+      .find((key) => !!this.errors[key]);
+  }
+
+  @computed get stepsKeys () {
+    return this.steps.map((s) => s.key);
+  }
+
+  @computed get steps () {
+    return Object
+      .keys(STEPS)
+      .map((key) => {
+        return {
+          ...STEPS[key],
+          key
+        };
+      })
+      .filter((step) => {
+        return (this.walletType !== 'WATCH' || step.key !== 'DEPLOYMENT');
+      });
+  }
+
+  @computed get waiting () {
+    this.steps
+      .map((s, idx) => ({ idx, waiting: s.waiting }))
+      .filter((s) => s.waiting)
+      .map((s) => s.idx);
+  }
+
+  constructor (api, accounts) {
+    this.api = api;
+
+    this.step = this.stepsKeys[0];
+    this.wallet.account = Object.values(accounts)[0].address;
+    this.validateWallet(this.wallet);
+  }
+
+  @action onTypeChange = (type) => {
+    this.walletType = type;
+    this.validateWallet(this.wallet);
+  }
+
+  @action onNext = () => {
+    const stepIndex = this.stepsKeys.findIndex((k) => k === this.step) + 1;
+    this.step = this.stepsKeys[stepIndex];
+  }
+
+  @action onChange = (_wallet) => {
+    const newWallet = Object.assign({}, this.wallet, _wallet);
+    this.validateWallet(newWallet);
+  }
+
+  @action onAdd = () => {
+    if (this.hasErrors) {
+      return;
+    }
+
+    const walletContract = new Contract(this.api, walletAbi).at(this.wallet.address);
+
+    return Promise
+      .all([
+        WalletsUtils.fetchRequire(walletContract),
+        WalletsUtils.fetchOwners(walletContract),
+        WalletsUtils.fetchDailylimit(walletContract)
+      ])
+      .then(([ require, owners, dailylimit ]) => {
+        transaction(() => {
+          this.wallet.owners = owners;
+          this.wallet.required = require.toNumber();
+          this.wallet.dailylimit = dailylimit.limit;
+        });
+
+        return this.addWallet(this.wallet);
+      });
+  }
+
+  @action onCreate = () => {
+    if (this.hasErrors) {
+      return;
+    }
+
+    this.step = 'DEPLOYMENT';
+
+    const { account, owners, required, daylimit } = this.wallet;
+
+    const options = {
+      data: walletCode,
+      from: account
+    };
+
+    this.api
+      .newContract(walletAbi)
+      .deploy(options, [ owners, required, daylimit ], this.onDeploymentState)
+      .then((address) => {
+        this.deployed = true;
+        this.wallet.address = address;
+        return this.addWallet(this.wallet);
+      })
+      .catch((error) => {
+        if (error.code === ERROR_CODES.REQUEST_REJECTED) {
+          this.rejected = true;
+          return;
+        }
+
+        console.error('error deploying contract', error);
+        this.deployError = error;
+      });
+  }
+
+  @action addWallet = (wallet) => {
+    const { address, name, description } = wallet;
+
+    return Promise
+      .all([
+        this.api.parity.setAccountName(address, name),
+        this.api.parity.setAccountMeta(address, {
+          abi: walletAbi,
+          wallet: true,
+          timestamp: Date.now(),
+          deleted: false,
+          description,
+          name,
+          tags: ['wallet']
+        })
+      ])
+      .then(() => {
+        this.step = 'INFO';
+      });
+  }
+
+  onDeploymentState = (error, data) => {
+    if (error) {
+      return console.error('createWallet::onDeploymentState', error);
+    }
+
+    switch (data.state) {
+      case 'estimateGas':
+      case 'postTransaction':
+        this.deployState = 'Preparing transaction for network transmission';
+        return;
+
+      case 'checkRequest':
+        this.deployState = 'Waiting for confirmation of the transaction in the Parity Secure Signer';
+        return;
+
+      case 'getTransactionReceipt':
+        this.deployState = 'Waiting for the contract deployment transaction receipt';
+        this.txhash = data.txhash;
+        return;
+
+      case 'hasReceipt':
+      case 'getCode':
+        this.deployState = 'Validating the deployed contract code';
+        return;
+
+      case 'completed':
+        this.deployState = 'The contract deployment has been completed';
+        return;
+
+      default:
+        console.error('createWallet::onDeploymentState', 'unknow contract deployment state', data);
+        return;
+    }
+  }
+
+  @action validateWallet = (_wallet) => {
+    const addressValidation = validateAddress(_wallet.address);
+    const accountValidation = validateAddress(_wallet.account);
+    const requiredValidation = validateUint(_wallet.required);
+    const daylimitValidation = validateUint(_wallet.daylimit);
+    const nameValidation = validateName(_wallet.name);
+
+    const errors = {
+      address: addressValidation.addressError,
+      account: accountValidation.addressError,
+      required: requiredValidation.valueError,
+      daylimit: daylimitValidation.valueError,
+      name: nameValidation.nameError
+    };
+
+    const wallet = {
+      ..._wallet,
+      address: addressValidation.address,
+      account: accountValidation.address,
+      required: requiredValidation.value,
+      daylimit: daylimitValidation.value,
+      name: nameValidation.name
+    };
+
+    transaction(() => {
+      this.wallet = wallet;
+      this.errors = errors;
+    });
+  }
+}

js/src/modals/CreateWallet/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 './createWallet';

js/src/modals/DeleteAccount/deleteAccount.js

@@ -19,7 +19,7 @@ import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
 
 import { ConfirmDialog, IdentityIcon, IdentityName, Input } from '~/ui';
-import { newError } from '../../redux/actions';
+import { newError } from '~/redux/actions';
 
 import styles from './deleteAccount.css';
 

js/src/modals/SMSVerification/GatherData/gatherData.js

@@ -15,7 +15,6 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 import React, { Component, PropTypes } from 'react';
-import nullable from '../../../util/nullable-proptype';
 import BigNumber from 'bignumber.js';
 import { Checkbox } from 'material-ui';
 import InfoIcon from 'material-ui/svg-icons/action/info-outline';
@@ -24,6 +23,7 @@ import ErrorIcon from 'material-ui/svg-icons/navigation/close';
 
 import { fromWei } from '~/api/util/wei';
 import { Form, Input } from '~/ui';
+import { nullableProptype } from '~/util/proptypes';
 
 import { termsOfService } from '../../../3rdparty/sms-verification';
 import styles from './gatherData.css';
@@ -32,8 +32,8 @@ export default class GatherData extends Component {
   static propTypes = {
     fee: React.PropTypes.instanceOf(BigNumber),
     isNumberValid: PropTypes.bool.isRequired,
-    isVerified: nullable(PropTypes.bool.isRequired),
+    isVerified: nullableProptype(PropTypes.bool.isRequired),
-    hasRequested: nullable(PropTypes.bool.isRequired),
+    hasRequested: nullableProptype(PropTypes.bool.isRequired),
     setNumber: PropTypes.func.isRequired,
     setConsentGiven: PropTypes.func.isRequired
   }

js/src/modals/SMSVerification/SendConfirmation/sendConfirmation.js

@@ -15,8 +15,8 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 import React, { Component, PropTypes } from 'react';
-import nullable from '../../../util/nullable-proptype';
 
+import { nullableProptype } from '~/util/proptypes';
 import TxHash from '~/ui/TxHash';
 import {
   POSTING_CONFIRMATION, POSTED_CONFIRMATION
@@ -27,7 +27,7 @@ import styles from './sendConfirmation.css';
 export default class SendConfirmation extends Component {
   static propTypes = {
     step: PropTypes.any.isRequired,
-    tx: nullable(PropTypes.any.isRequired)
+    tx: nullableProptype(PropTypes.any.isRequired)
   }
 
   render () {

js/src/modals/SMSVerification/SendRequest/sendRequest.js

@@ -15,8 +15,8 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 import React, { Component, PropTypes } from 'react';
-import nullable from '../../../util/nullable-proptype';
 
+import { nullableProptype } from '~/util/proptypes';
 import TxHash from '~/ui/TxHash';
 import {
   POSTING_REQUEST, POSTED_REQUEST, REQUESTING_SMS
@@ -27,7 +27,7 @@ import styles from './sendRequest.css';
 export default class SendRequest extends Component {
   static propTypes = {
     step: PropTypes.any.isRequired,
-    tx: nullable(PropTypes.any.isRequired)
+    tx: nullableProptype(PropTypes.any.isRequired)
   }
 
   render () {

js/src/modals/Transfer/Details/details.js

@@ -17,10 +17,10 @@
 import BigNumber from 'bignumber.js';
 import React, { Component, PropTypes } from 'react';
 import { Checkbox, MenuItem } from 'material-ui';
-
 import { isEqual } from 'lodash';
 
-import Form, { Input, InputAddressSelect, Select } from '~/ui/Form';
+import Form, { Input, InputAddressSelect, AddressSelect, Select } from '~/ui/Form';
+import { nullableProptype } from '~/util/proptypes';
 
 import imageUnknown from '../../../../assets/images/contracts/unknown-64x64.png';
 import styles from '../transfer.css';
@@ -132,6 +132,8 @@ export default class Details extends Component {
     all: PropTypes.bool,
     extras: PropTypes.bool,
     images: PropTypes.object.isRequired,
+    sender: PropTypes.string,
+    senderError: PropTypes.string,
     recipient: PropTypes.string,
     recipientError: PropTypes.string,
     tag: PropTypes.string,
@@ -139,8 +141,15 @@ export default class Details extends Component {
     totalError: PropTypes.string,
     value: PropTypes.string,
     valueError: PropTypes.string,
-    onChange: PropTypes.func.isRequired
+    onChange: PropTypes.func.isRequired,
-  }
+    wallet: PropTypes.object,
+    senders: nullableProptype(PropTypes.object)
+  };
+
+  static defaultProps = {
+    wallet: null,
+    senders: null
+  };
 
   render () {
     const { all, extras, tag, total, totalError, value, valueError } = this.props;
@@ -149,6 +158,7 @@ export default class Details extends Component {
     return (
       <Form>
         { this.renderTokenSelect() }
+        { this.renderFromAddress() }
         { this.renderToAddress() }
         <div className={ styles.columns }>
           <div>
@@ -179,6 +189,7 @@ export default class Details extends Component {
               </div>
             </Input>
           </div>
+
           <div>
             <Checkbox
               checked={ extras }
@@ -191,6 +202,27 @@ export default class Details extends Component {
     );
   }
 
+  renderFromAddress () {
+    const { sender, senderError, senders } = this.props;
+
+    if (!senders) {
+      return null;
+    }
+
+    return (
+      <div className={ styles.address }>
+        <AddressSelect
+          accounts={ senders }
+          error={ senderError }
+          label='sender address'
+          hint='the sender address'
+          value={ sender }
+          onChange={ this.onEditSender }
+        />
+      </div>
+    );
+  }
+
   renderToAddress () {
     const { recipient, recipientError } = this.props;
 
@@ -223,6 +255,10 @@ export default class Details extends Component {
     this.props.onChange('tag', tag);
   }
 
+  onEditSender = (event, sender) => {
+    this.props.onChange('sender', sender);
+  }
+
   onEditRecipient = (event, recipient) => {
     this.props.onChange('recipient', recipient);
   }

js/src/modals/Transfer/store.js

@@ -16,7 +16,11 @@
 
 import { observable, computed, action, transaction } from 'mobx';
 import BigNumber from 'bignumber.js';
+import { uniq } from 'lodash';
 
+import { wallet as walletAbi } from '~/contracts/abi';
+import { bytesToHex } from '~/api/util/format';
+import Contract from '~/api/contract';
 import ERRORS from './errors';
 import { ERROR_CODES } from '~/api/transport/error';
 import { DEFAULT_GAS, DEFAULT_GASPRICE, MAX_GAS_ESTIMATION } from '../../util/constants';
@@ -33,28 +37,37 @@ const STAGES_EXTRA = [TITLES.transfer, TITLES.extras, TITLES.sending, TITLES.com
 
 export default class TransferStore {
   @observable stage = 0;
-  @observable data = '';
-  @observable dataError = null;
   @observable extras = false;
-  @observable gas = DEFAULT_GAS;
+  @observable valueAll = false;
-  @observable gasEst = '0';
-  @observable gasError = null;
-  @observable gasLimitError = null;
-  @observable gasPrice = DEFAULT_GASPRICE;
-  @observable gasPriceError = null;
-  @observable recipient = '';
-  @observable recipientError = ERRORS.requireRecipient;
   @observable sending = false;
   @observable tag = 'ETH';
-  @observable total = '0.0';
-  @observable totalError = null;
-  @observable value = '0.0';
-  @observable valueAll = false;
-  @observable valueError = null;
   @observable isEth = true;
   @observable busyState = null;
   @observable rejected = false;
 
+  @observable data = '';
+  @observable dataError = null;
+
+  @observable gas = DEFAULT_GAS;
+  @observable gasError = null;
+
+  @observable gasEst = '0';
+  @observable gasLimitError = null;
+  @observable gasPrice = DEFAULT_GASPRICE;
+  @observable gasPriceError = null;
+
+  @observable recipient = '';
+  @observable recipientError = ERRORS.requireRecipient;
+
+  @observable sender = '';
+  @observable senderError = null;
+
+  @observable total = '0.0';
+  @observable totalError = null;
+
+  @observable value = '0.0';
+  @observable valueError = null;
+
   gasPriceHistogram = {};
 
   account = null;
@@ -62,6 +75,12 @@ export default class TransferStore {
   gasLimit = null;
   onClose = null;
 
+  senders = null;
+  sendersBalances = null;
+
+  isWallet = false;
+  wallet = null;
+
   @computed get steps () {
     const steps = [].concat(this.extras ? STAGES_EXTRA : STAGES_BASIC);
 
@@ -73,7 +92,7 @@ export default class TransferStore {
   }
 
   @computed get isValid () {
-    const detailsValid = !this.recipientError && !this.valueError && !this.totalError;
+    const detailsValid = !this.recipientError && !this.valueError && !this.totalError && !this.senderError;
     const extrasValid = !this.gasError && !this.gasPriceError && !this.totalError;
     const verifyValid = !this.passwordError;
 
@@ -89,15 +108,32 @@ export default class TransferStore {
     }
   }
 
+  get token () {
+    return this.balance.tokens.find((balance) => balance.token.tag === this.tag).token;
+  }
+
   constructor (api, props) {
     this.api = api;
 
-    const { account, balance, gasLimit, onClose } = props;
+    const { account, balance, gasLimit, senders, onClose, newError, sendersBalances } = props;
 
     this.account = account;
     this.balance = balance;
     this.gasLimit = gasLimit;
     this.onClose = onClose;
+    this.isWallet = account && account.wallet;
+    this.newError = newError;
+
+    if (this.isWallet) {
+      this.wallet = props.wallet;
+      this.walletContract = new Contract(this.api, walletAbi);
+    }
+
+    if (senders) {
+      this.senders = senders;
+      this.sendersBalances = sendersBalances;
+      this.senderError = ERRORS.requireSender;
+    }
   }
 
   @action onNext = () => {
@@ -133,6 +169,9 @@ export default class TransferStore {
       case 'recipient':
         return this._onUpdateRecipient(value);
 
+      case 'sender':
+        return this._onUpdateSender(value);
+
       case 'tag':
         return this._onUpdateTag(value);
 
@@ -165,9 +204,8 @@ export default class TransferStore {
     this.onNext();
     this.sending = true;
 
-    const promise = this.isEth ? this._sendEth() : this._sendToken();
+    this
-
+      .send()
-    promise
       .then((requestId) => {
         this.busyState = 'Waiting for authorization in the Parity Signer';
 
@@ -190,6 +228,10 @@ export default class TransferStore {
           this.txhash = txhash;
           this.busyState = 'Your transaction has been posted to the network';
         });
+
+        if (this.isWallet) {
+          return this._attachWalletOperation(txhash);
+        }
       })
       .catch((error) => {
         this.sending = false;
@@ -197,6 +239,34 @@ export default class TransferStore {
       });
   }
 
+  @action _attachWalletOperation = (txhash) => {
+    let ethSubscriptionId = null;
+
+    return this.api.subscribe('eth_blockNumber', () => {
+      this.api.eth
+        .getTransactionReceipt(txhash)
+        .then((tx) => {
+          if (!tx) {
+            return;
+          }
+
+          const logs = this.walletContract.parseEventLogs(tx.logs);
+          const operations = uniq(logs
+            .filter((log) => log && log.params && log.params.operation)
+            .map((log) => bytesToHex(log.params.operation.value)));
+
+          if (operations.length > 0) {
+            this.operation = operations[0];
+          }
+
+          this.api.unsubscribe(ethSubscriptionId);
+          ethSubscriptionId = null;
+        });
+    }).then((subId) => {
+      ethSubscriptionId = subId;
+    });
+  }
+
   @action _onUpdateAll = (valueAll) => {
     this.valueAll = valueAll;
     this.recalculateGas();
@@ -250,6 +320,23 @@ export default class TransferStore {
     });
   }
 
+  @action _onUpdateSender = (sender) => {
+    let senderError = null;
+
+    if (!sender || !sender.length) {
+      senderError = ERRORS.requireSender;
+    } else if (!this.api.util.isAddressValid(sender)) {
+      senderError = ERRORS.invalidAddress;
+    }
+
+    transaction(() => {
+      this.sender = sender;
+      this.senderError = senderError;
+
+      this.recalculateGas();
+    });
+  }
+
   @action _onUpdateTag = (tag) => {
     transaction(() => {
       this.tag = tag;
@@ -280,9 +367,8 @@ export default class TransferStore {
       return this.recalculate();
     }
 
-    const promise = this.isEth ? this._estimateGasEth() : this._estimateGasToken();
+    this
-
+      .estimateGas()
-    promise
       .then((gasEst) => {
         let gas = gasEst;
         let gasLimitError = null;
@@ -312,19 +398,29 @@ export default class TransferStore {
   }
 
   @action recalculate = () => {
-    const { account, balance } = this;
+    const { account } = this;
 
-    if (!account || !balance) {
+    if (!account || !this.balance) {
+      return;
+    }
+
+    const balance = this.senders
+      ? this.sendersBalances[this.sender]
+      : this.balance;
+
+    if (!balance) {
       return;
     }
 
     const { gas, gasPrice, tag, valueAll, isEth } = this;
 
     const gasTotal = new BigNumber(gasPrice || 0).mul(new BigNumber(gas || 0));
-    const balance_ = balance.tokens.find((b) => tag === b.token.tag);
+
     const availableEth = new BigNumber(balance.tokens[0].value);
-    const available = new BigNumber(balance_.value);
+
-    const format = new BigNumber(balance_.token.format || 1);
+    const senderBalance = this.balance.tokens.find((b) => tag === b.token.tag);
+    const available = new BigNumber(senderBalance.value);
+    const format = new BigNumber(senderBalance.token.format || 1);
 
     let { value, valueError } = this;
     let totalEth = gasTotal;
@@ -361,74 +457,99 @@ export default class TransferStore {
     });
   }
 
-  _sendEth () {
+  send () {
-    const { account, data, gas, gasPrice, recipient, value } = this;
+    const { options, values } = this._getTransferParams();
+    return this._getTransferMethod().postTransaction(options, values);
+  }
+
+  _estimateGas (forceToken = false) {
+    const { options, values } = this._getTransferParams(true, forceToken);
+    return this._getTransferMethod(true, forceToken).estimateGas(options, values);
+  }
+
+  estimateGas () {
+    if (this.isEth || !this.isWallet) {
+      return this._estimateGas();
+    }
+
+    return Promise
+      .all([
+        this._estimateGas(true),
+        this._estimateGas()
+      ])
+      .then((results) => results[0].plus(results[1]));
+  }
+
+  _getTransferMethod (gas = false, forceToken = false) {
+    const { isEth, isWallet } = this;
+
+    if (isEth && !isWallet && !forceToken) {
+      return gas ? this.api.eth : this.api.parity;
+    }
+
+    if (isWallet && !forceToken) {
+      return this.wallet.instance.execute;
+    }
+
+    return this.token.contract.instance.transfer;
+  }
+
+  _getData (gas = false) {
+    const { isEth, isWallet } = this;
+
+    if (!isWallet || isEth) {
+      return this.data && this.data.length ? this.data : '';
+    }
+
+    const func = this._getTransferMethod(gas, true);
+    const { options, values } = this._getTransferParams(gas, true);
+
+    return this.token.contract.getCallData(func, options, values);
+  }
+
+  _getTransferParams (gas = false, forceToken = false) {
+    const { isEth, isWallet } = this;
+
+    const to = (isEth && !isWallet) ? this.recipient
+      : (this.isWallet ? this.wallet.address : this.token.address);
 
     const options = {
-      from: account.address,
+      from: this.sender || this.account.address,
-      to: recipient,
+      to
-      gas,
-      gasPrice,
-      value: this.api.util.toWei(value || 0)
     };
 
-    if (data && data.length) {
+    if (!gas) {
-      options.data = data;
+      options.gas = this.gas;
+      options.gasPrice = this.gasPrice;
+    } else {
+      options.gas = MAX_GAS_ESTIMATION;
     }
 
-    return this.api.parity.postTransaction(options);
+    if (isEth && !isWallet && !forceToken) {
+      options.value = this.api.util.toWei(this.value || 0);
+      options.data = this._getData(gas);
+
+      return { options, values: [] };
     }
 
-  _sendToken () {
+    if (isWallet && !forceToken) {
-    const { account, balance } = this;
+      const to = isEth ? this.recipient : this.token.contract.address;
-    const { gas, gasPrice, recipient, value, tag } = this;
+      const value = isEth ? this.api.util.toWei(this.value || 0) : new BigNumber(0);
 
-    const token = balance.tokens.find((balance) => balance.token.tag === tag).token;
+      const values = [
+        to, value,
+        this._getData(gas)
+      ];
 
-    return token.contract.instance.transfer
+      return { options, values };
-      .postTransaction({
-        from: account.address,
-        to: token.address,
-        gas,
-        gasPrice
-      }, [
-        recipient,
-        new BigNumber(value).mul(token.format).toFixed(0)
-      ]);
     }
 
-  _estimateGasToken () {
+    const values = [
-    const { account, balance } = this;
+      this.recipient,
-    const { recipient, value, tag } = this;
+      new BigNumber(this.value || 0).mul(this.token.format).toFixed(0)
+    ];
 
-    const token = balance.tokens.find((balance) => balance.token.tag === tag).token;
+    return { options, values };
-
-    return token.contract.instance.transfer
-      .estimateGas({
-        gas: MAX_GAS_ESTIMATION,
-        from: account.address,
-        to: token.address
-      }, [
-        recipient,
-        new BigNumber(value || 0).mul(token.format).toFixed(0)
-      ]);
-  }
-
-  _estimateGasEth () {
-    const { account, data, recipient, value } = this;
-
-    const options = {
-      gas: MAX_GAS_ESTIMATION,
-      from: account.address,
-      to: recipient,
-      value: this.api.util.toWei(value || 0)
-    };
-
-    if (data && data.length) {
-      options.data = data;
-    }
-
-    return this.api.eth.estimateGas(options);
   }
 
   _validatePositiveNumber (num) {

js/src/modals/Transfer/transfer.js

@@ -18,6 +18,7 @@ import React, { Component, PropTypes } from 'react';
 import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
 import { observer } from 'mobx-react';
+import { pick } from 'lodash';
 
 import ActionDoneAll from 'material-ui/svg-icons/action/done-all';
 import ContentClear from 'material-ui/svg-icons/content/clear';
@@ -25,7 +26,8 @@ import NavigationArrowBack from 'material-ui/svg-icons/navigation/arrow-back';
 import NavigationArrowForward from 'material-ui/svg-icons/navigation/arrow-forward';
 
 import { newError } from '~/ui/Errors/actions';
-import { BusyStep, CompletedStep, Button, IdentityIcon, Modal, TxHash } from '~/ui';
+import { BusyStep, CompletedStep, Button, IdentityIcon, Modal, TxHash, Input } from '~/ui';
+import { nullableProptype } from '~/util/proptypes';
 
 import Details from './Details';
 import Extras from './Extras';
@@ -44,9 +46,11 @@ class Transfer extends Component {
     gasLimit: PropTypes.object.isRequired,
     images: PropTypes.object.isRequired,
 
+    senders: nullableProptype(PropTypes.object),
+    sendersBalances: nullableProptype(PropTypes.object),
     account: PropTypes.object,
     balance: PropTypes.object,
-    balances: PropTypes.object,
+    wallet: PropTypes.object,
     onClose: PropTypes.func
   }
 
@@ -130,14 +134,33 @@ class Transfer extends Component {
     return (
       <CompletedStep>
         <TxHash hash={ txhash } />
+        {
+          this.store.operation
+          ? (
+            <div>
+              <br />
+              <p>
+                This transaction needs confirmation from other owners.
+                <Input
+                  style={ { width: '50%', margin: '0 auto' } }
+                  value={ this.store.operation }
+                  label='operation hash'
+                  readOnly
+                  allowCopy
+                />
+              </p>
+            </div>
+          )
+          : null
+        }
       </CompletedStep>
     );
   }
 
   renderDetailsPage () {
-    const { account, balance, images } = this.props;
+    const { account, balance, images, senders } = this.props;
-    const { valueAll, extras, recipient, recipientError, tag } = this.store;
+    const { valueAll, extras, recipient, recipientError, sender, senderError } = this.store;
-    const { total, totalError, value, valueError } = this.store;
+    const { tag, total, totalError, value, valueError } = this.store;
 
     return (
       <Details
@@ -146,14 +169,19 @@ class Transfer extends Component {
         balance={ balance }
         extras={ extras }
         images={ images }
+        senders={ senders }
         recipient={ recipient }
         recipientError={ recipientError }
+        sender={ sender }
+        senderError={ senderError }
         tag={ tag }
         total={ total }
         totalError={ totalError }
         value={ value }
         valueError={ valueError }
-        onChange={ this.store.onUpdateDetails } />
+        onChange={ this.store.onUpdateDetails }
+        wallet={ account.wallet && this.props.wallet }
+      />
     );
   }
 
@@ -249,9 +277,30 @@ class Transfer extends Component {
   }
 }
 
-function mapStateToProps (state) {
+function mapStateToProps (initState, initProps) {
+  const { address } = initProps.account;
+
+  const isWallet = initProps.account && initProps.account.wallet;
+  const wallet = isWallet
+    ? initState.wallet.wallets[address]
+    : null;
+
+  const senders = isWallet
+    ? Object
+      .values(initState.personal.accounts)
+      .filter((account) => wallet.owners.includes(account.address))
+      .reduce((accounts, account) => {
+        accounts[account.address] = account;
+        return accounts;
+      }, {})
+    : null;
+
+  return (state) => {
     const { gasLimit } = state.nodeStatus;
-  return { gasLimit };
+    const sendersBalances = senders ? pick(state.balances.balances, Object.keys(senders)) : null;
+
+    return { gasLimit, wallet, senders, sendersBalances };
+  };
 }
 
 function mapDispatchToProps (dispatch) {

js/src/modals/index.js

@@ -17,6 +17,7 @@
 import AddAddress from './AddAddress';
 import AddContract from './AddContract';
 import CreateAccount from './CreateAccount';
+import CreateWallet from './CreateWallet';
 import DeleteAccount from './DeleteAccount';
 import DeployContract from './DeployContract';
 import EditMeta from './EditMeta';
@@ -33,6 +34,7 @@ export {
   AddAddress,
   AddContract,
   CreateAccount,
+  CreateWallet,
   DeleteAccount,
   DeployContract,
   EditMeta,

js/src/redux/providers/balancesActions.js

@@ -113,7 +113,7 @@ export function fetchTokens (_tokenIds) {
 export function fetchBalances (_addresses) {
   return (dispatch, getState) => {
     const { api, personal } = getState();
-    const { visibleAccounts } = personal;
+    const { visibleAccounts, accounts } = personal;
 
     const addresses = uniq(_addresses || visibleAccounts || []);
 
@@ -123,12 +123,14 @@ export function fetchBalances (_addresses) {
 
     const fullFetch = addresses.length === 1;
 
+    const fetchedAddresses = uniq(addresses.concat(Object.keys(accounts)));
+
     return Promise
-      .all(addresses.map((addr) => fetchAccount(addr, api, fullFetch)))
+      .all(fetchedAddresses.map((addr) => fetchAccount(addr, api, fullFetch)))
       .then((accountsBalances) => {
         const balances = {};
 
-        addresses.forEach((addr, idx) => {
+        fetchedAddresses.forEach((addr, idx) => {
           balances[addr] = accountsBalances[idx];
         });
 

js/src/redux/providers/index.js

@@ -28,3 +28,4 @@ export statusReducer from './statusReducer';
 export blockchainReducer from './blockchainReducer';
 export compilerReducer from './compilerReducer';
 export snackbarReducer from './snackbarReducer';
+export walletReducer from './walletReducer';

js/src/redux/providers/personalActions.js

@@ -17,11 +17,45 @@
 import { isEqual } from 'lodash';
 
 import { fetchBalances } from './balancesActions';
+import { attachWallets } from './walletActions';
 
 export function personalAccountsInfo (accountsInfo) {
+  const accounts = {};
+  const contacts = {};
+  const contracts = {};
+  const wallets = {};
+
+  Object.keys(accountsInfo || {})
+    .map((address) => Object.assign({}, accountsInfo[address], { address }))
+    .filter((account) => !account.meta.deleted)
+    .forEach((account) => {
+      if (account.uuid) {
+        accounts[account.address] = account;
+      } else if (account.meta.wallet) {
+        account.wallet = true;
+        wallets[account.address] = account;
+      } else if (account.meta.contract) {
+        contracts[account.address] = account;
+      } else {
+        contacts[account.address] = account;
+      }
+    });
+
+  return (dispatch) => {
+    const data = {
+      accountsInfo,
+      accounts, contacts, contracts, wallets
+    };
+
+    dispatch(_personalAccountsInfo(data));
+    dispatch(attachWallets(wallets));
+  };
+}
+
+function _personalAccountsInfo (data) {
   return {
     type: 'personalAccountsInfo',
-    accountsInfo
+    ...data
   };
 }
 

js/src/redux/providers/personalReducer.js

@@ -25,28 +25,14 @@ const initialState = {
   hasContacts: false,
   contracts: {},
   hasContracts: false,
+  wallet: {},
+  hasWallets: false,
   visibleAccounts: []
 };
 
 export default handleActions({
   personalAccountsInfo (state, action) {
-    const { accountsInfo } = action;
+    const { accountsInfo, accounts, contacts, contracts, wallets } = action;
-    const accounts = {};
-    const contacts = {};
-    const contracts = {};
-
-    Object.keys(accountsInfo || {})
-      .map((address) => Object.assign({}, accountsInfo[address], { address }))
-      .filter((account) => !account.meta.deleted)
-      .forEach((account) => {
-        if (account.uuid) {
-          accounts[account.address] = account;
-        } else if (account.meta.contract) {
-          contracts[account.address] = account;
-        } else {
-          contacts[account.address] = account;
-        }
-      });
 
     return Object.assign({}, state, {
       accountsInfo,
@@ -55,7 +41,9 @@ export default handleActions({
       contacts,
       hasContacts: Object.keys(contacts).length !== 0,
       contracts,
-      hasContracts: Object.keys(contracts).length !== 0
+      hasContracts: Object.keys(contracts).length !== 0,
+      wallets,
+      hasWallets: Object.keys(wallets).length !== 0
     });
   },
 

js/src/redux/providers/walletActions.js

@@ -0,0 +1,503 @@
+// 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 { isEqual, uniq } from 'lodash';
+
+import Contract from '~/api/contract';
+import { wallet as WALLET_ABI } from '~/contracts/abi';
+import { bytesToHex, toHex } from '~/api/util/format';
+
+import { ERROR_CODES } from '~/api/transport/error';
+import { MAX_GAS_ESTIMATION } from '../../util/constants';
+
+import WalletsUtils from '~/util/wallets';
+
+import { newError } from '~/ui/Errors/actions';
+
+const UPDATE_OWNERS = 'owners';
+const UPDATE_REQUIRE = 'require';
+const UPDATE_DAILYLIMIT = 'dailylimit';
+const UPDATE_TRANSACTIONS = 'transactions';
+const UPDATE_CONFIRMATIONS = 'confirmations';
+
+export function confirmOperation (address, owner, operation) {
+  return modifyOperation('confirm', address, owner, operation);
+}
+
+export function revokeOperation (address, owner, operation) {
+  return modifyOperation('revoke', address, owner, operation);
+}
+
+function modifyOperation (method, address, owner, operation) {
+  return (dispatch, getState) => {
+    const { api } = getState();
+    const contract = new Contract(api, WALLET_ABI).at(address);
+
+    const options = {
+      from: owner,
+      gas: MAX_GAS_ESTIMATION
+    };
+
+    const values = [ operation ];
+
+    dispatch(setOperationPendingState(address, operation, true));
+
+    contract.instance[method]
+      .estimateGas(options, values)
+      .then((gas) => {
+        options.gas = gas;
+        return contract.instance[method].postTransaction(options, values);
+      })
+      .then((requestId) => {
+        return api
+          .pollMethod('parity_checkRequest', requestId)
+          .catch((e) => {
+            dispatch(setOperationPendingState(address, operation, false));
+            if (e.code === ERROR_CODES.REQUEST_REJECTED) {
+              return;
+            }
+
+            throw e;
+          });
+      })
+      .catch((error) => {
+        dispatch(setOperationPendingState(address, operation, false));
+        dispatch(newError(error));
+      });
+  };
+}
+
+export function attachWallets (_wallets) {
+  return (dispatch, getState) => {
+    const { wallet, api } = getState();
+
+    const prevAddresses = wallet.walletsAddresses;
+    const nextAddresses = Object.keys(_wallets).map((a) => a.toLowerCase()).sort();
+
+    if (isEqual(prevAddresses, nextAddresses)) {
+      return;
+    }
+
+    if (wallet.filterSubId) {
+      api.eth.uninstallFilter(wallet.filterSubId);
+    }
+
+    if (nextAddresses.length === 0) {
+      return dispatch(updateWallets({ wallets: {}, walletsAddresses: [], filterSubId: null }));
+    }
+
+    const filterOptions = {
+      fromBlock: 0,
+      toBlock: 'latest',
+      address: nextAddresses
+    };
+
+    api.eth
+      .newFilter(filterOptions)
+      .then((filterId) => {
+        dispatch(updateWallets({ wallets: _wallets, walletsAddresses: nextAddresses, filterSubId: filterId }));
+      })
+      .catch((error) => {
+        if (process.env.NODE_ENV === 'production') {
+          console.error('walletActions::attachWallets', error);
+        } else {
+          throw error;
+        }
+      });
+
+    fetchWalletsInfo(Object.keys(_wallets))(dispatch, getState);
+  };
+}
+
+export function load (api) {
+  return (dispatch, getState) => {
+    const contract = new Contract(api, WALLET_ABI);
+
+    dispatch(setWalletContract(contract));
+    api.subscribe('eth_blockNumber', (error) => {
+      if (error) {
+        if (process.env.NODE_ENV === 'production') {
+          return console.error('[eth_blockNumber] walletActions::load', error);
+        } else {
+          throw error;
+        }
+      }
+
+      const { filterSubId } = getState().wallet;
+
+      if (!filterSubId) {
+        return;
+      }
+
+      api.eth
+        .getFilterChanges(filterSubId)
+        .then((logs) => contract.parseEventLogs(logs))
+        .then((logs) => {
+          parseLogs(logs)(dispatch, getState);
+        })
+        .catch((error) => {
+          if (process.env.NODE_ENV === 'production') {
+            return console.error('[getFilterChanges] walletActions::load', error);
+          } else {
+            throw error;
+          }
+        });
+    });
+  };
+}
+
+function fetchWalletsInfo (updates) {
+  return (dispatch, getState) => {
+    if (Array.isArray(updates)) {
+      const _updates = updates.reduce((updates, address) => {
+        updates[address] = {
+          [ UPDATE_OWNERS ]: true,
+          [ UPDATE_REQUIRE ]: true,
+          [ UPDATE_DAILYLIMIT ]: true,
+          [ UPDATE_CONFIRMATIONS ]: true,
+          [ UPDATE_TRANSACTIONS ]: true,
+          address
+        };
+
+        return updates;
+      }, {});
+
+      return fetchWalletsInfo(_updates)(dispatch, getState);
+    }
+
+    const { api } = getState();
+    const _updates = Object.values(updates);
+
+    Promise
+      .all(_updates.map((update) => {
+        const contract = new Contract(api, WALLET_ABI).at(update.address);
+        return fetchWalletInfo(contract, update, getState);
+      }))
+      .then((updates) => {
+        dispatch(updateWalletsDetails(updates));
+      })
+      .catch((error) => {
+        if (process.env.NODE_ENV === 'production') {
+          return console.error('walletAction::fetchWalletsInfo', error);
+        } else {
+          throw error;
+        }
+      });
+  };
+}
+
+function fetchWalletInfo (contract, update, getState) {
+  const promises = [];
+
+  if (update[UPDATE_OWNERS]) {
+    promises.push(fetchWalletOwners(contract));
+  }
+
+  if (update[UPDATE_REQUIRE]) {
+    promises.push(fetchWalletRequire(contract));
+  }
+
+  if (update[UPDATE_DAILYLIMIT]) {
+    promises.push(fetchWalletDailylimit(contract));
+  }
+
+  if (update[UPDATE_TRANSACTIONS]) {
+    promises.push(fetchWalletTransactions(contract));
+  }
+
+  return Promise
+    .all(promises)
+    .then((updates) => {
+      if (update[UPDATE_CONFIRMATIONS]) {
+        const ownersUpdate = updates.find((u) => u.key === UPDATE_OWNERS);
+        const transactionsUpdate = updates.find((u) => u.key === UPDATE_TRANSACTIONS);
+
+        const owners = ownersUpdate && ownersUpdate.value || null;
+        const transactions = transactionsUpdate && transactionsUpdate.value || null;
+
+        return fetchWalletConfirmations(contract, owners, transactions, getState)
+          .then((update) => {
+            updates.push(update);
+            return updates;
+          });
+      }
+
+      return updates;
+    })
+    .then((updates) => {
+      const wallet = { address: update.address };
+
+      updates.forEach((update) => {
+        wallet[update.key] = update.value;
+      });
+
+      return wallet;
+    });
+}
+
+function fetchWalletTransactions (contract) {
+  return WalletsUtils
+    .fetchTransactions(contract)
+    .then((transactions) => {
+      return {
+        key: UPDATE_TRANSACTIONS,
+        value: transactions
+      };
+    });
+}
+
+function fetchWalletOwners (contract) {
+  return WalletsUtils
+    .fetchOwners(contract)
+    .then((value) => {
+      return {
+        key: UPDATE_OWNERS,
+        value
+      };
+    });
+}
+
+function fetchWalletRequire (contract) {
+  return WalletsUtils
+    .fetchRequire(contract)
+    .then((value) => {
+      return {
+        key: UPDATE_REQUIRE,
+        value
+      };
+    });
+}
+
+function fetchWalletDailylimit (contract) {
+  return WalletsUtils
+    .fetchDailylimit(contract)
+    .then((value) => {
+      return {
+        key: UPDATE_DAILYLIMIT,
+        value
+      };
+    });
+}
+
+function fetchWalletConfirmations (contract, _owners = null, _transactions = null, getState) {
+  const walletInstance = contract.instance;
+
+  const wallet = getState().wallet.wallets[contract.address];
+
+  const owners = _owners || (wallet && wallet.owners) || null;
+  const transactions = _transactions || (wallet && wallet.transactions) || null;
+
+  return walletInstance
+    .ConfirmationNeeded
+    .getAllLogs()
+    .then((logs) => {
+      return logs.sort((logA, logB) => {
+        const comp = logA.blockNumber.comparedTo(logB.blockNumber);
+
+        if (comp !== 0) {
+          return comp;
+        }
+
+        return logA.transactionIndex.comparedTo(logB.transactionIndex);
+      });
+    })
+    .then((logs) => {
+      return logs.map((log) => ({
+        initiator: log.params.initiator.value,
+        to: log.params.to.value,
+        data: log.params.data.value,
+        value: log.params.value.value,
+        operation: bytesToHex(log.params.operation.value),
+        transactionHash: log.transactionHash,
+        blockNumber: log.blockNumber,
+        confirmedBy: []
+      }));
+    })
+    .then((confirmations) => {
+      if (confirmations.length === 0) {
+        return confirmations;
+      }
+
+      if (transactions) {
+        const operations = transactions
+          .filter((t) => t.operation)
+          .map((t) => t.operation);
+
+        return confirmations.filter((confirmation) => {
+          return !operations.includes(confirmation.operation);
+        });
+      }
+
+      return confirmations;
+    })
+    .then((confirmations) => {
+      if (confirmations.length === 0) {
+        return confirmations;
+      }
+
+      const operations = confirmations.map((conf) => conf.operation);
+      return Promise
+        .all(operations.map((op) => fetchOperationConfirmations(contract, op, owners)))
+        .then((confirmedBys) => {
+          confirmations.forEach((_, index) => {
+            confirmations[index].confirmedBy = confirmedBys[index];
+          });
+
+          return confirmations;
+        });
+    })
+    .then((confirmations) => {
+      return {
+        key: UPDATE_CONFIRMATIONS,
+        value: confirmations
+      };
+    });
+}
+
+function fetchOperationConfirmations (contract, operation, owners = null) {
+  if (!owners) {
+    console.warn('[fetchOperationConfirmations] try to provide the owners for the Wallet', contract.address);
+  }
+
+  const walletInstance = contract.instance;
+
+  const promise = owners
+    ? Promise.resolve({ value: owners })
+    : fetchWalletOwners(contract);
+
+  return promise
+    .then((result) => {
+      const owners = result.value;
+      return Promise
+        .all(owners.map((owner) => walletInstance.hasConfirmed.call({}, [ operation, owner ])))
+        .then((data) => {
+          return owners.filter((owner, index) => data[index]);
+        });
+    });
+}
+
+function parseLogs (logs) {
+  return (dispatch, getState) => {
+    if (!logs || logs.length === 0) {
+      return;
+    }
+
+    const { wallet } = getState();
+    const { contract } = wallet;
+    const walletInstance = contract.instance;
+
+    const signatures = {
+      OwnerChanged: toHex(walletInstance.OwnerChanged.signature),
+      OwnerAdded: toHex(walletInstance.OwnerAdded.signature),
+      OwnerRemoved: toHex(walletInstance.OwnerRemoved.signature),
+      RequirementChanged: toHex(walletInstance.RequirementChanged.signature),
+      Confirmation: toHex(walletInstance.Confirmation.signature),
+      Revoke: toHex(walletInstance.Revoke.signature),
+      Deposit: toHex(walletInstance.Deposit.signature),
+      SingleTransact: toHex(walletInstance.SingleTransact.signature),
+      MultiTransact: toHex(walletInstance.MultiTransact.signature),
+      ConfirmationNeeded: toHex(walletInstance.ConfirmationNeeded.signature)
+    };
+
+    const updates = {};
+
+    logs.forEach((log) => {
+      const { address, topics } = log;
+      const eventSignature = toHex(topics[0]);
+      const prev = updates[address] || { address };
+
+      switch (eventSignature) {
+        case signatures.OwnerChanged:
+        case signatures.OwnerAdded:
+        case signatures.OwnerRemoved:
+          updates[address] = {
+            ...prev,
+            [ UPDATE_OWNERS ]: true
+          };
+          return;
+
+        case signatures.RequirementChanged:
+          updates[address] = {
+            ...prev,
+            [ UPDATE_REQUIRE ]: true
+          };
+          return;
+
+        case signatures.Confirmation:
+        case signatures.Revoke:
+          const operation = log.params.operation.value;
+
+          updates[address] = {
+            ...prev,
+            [ UPDATE_CONFIRMATIONS ]: uniq(
+              (prev.operations || []).concat(operation)
+            )
+          };
+          return;
+
+        case signatures.Deposit:
+        case signatures.SingleTransact:
+        case signatures.MultiTransact:
+          updates[address] = {
+            ...prev,
+            [ UPDATE_TRANSACTIONS ]: true
+          };
+          return;
+
+        case signatures.ConfirmationNeeded:
+          const op = log.params.operation.value;
+
+          updates[address] = {
+            ...prev,
+            [ UPDATE_CONFIRMATIONS ]: uniq(
+              (prev.operations || []).concat(op)
+            )
+          };
+          return;
+      }
+    });
+
+    fetchWalletsInfo(updates)(dispatch, getState);
+  };
+}
+
+function setOperationPendingState (address, operation, isPending) {
+  return {
+    type: 'setOperationPendingState',
+    address, operation, isPending
+  };
+}
+
+function updateWalletsDetails (wallets) {
+  return {
+    type: 'updateWalletsDetails',
+    wallets
+  };
+}
+
+function setWalletContract (contract) {
+  return {
+    type: 'setWalletContract',
+    contract
+  };
+}
+
+function updateWallets (data) {
+  return {
+    type: 'updateWallets',
+    ...data
+  };
+}

js/src/redux/providers/walletReducer.js

@@ -0,0 +1,89 @@
+// 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 { handleActions } from 'redux-actions';
+
+const initialState = {
+  wallets: {},
+  walletsAddresses: [],
+  filterSubId: null,
+  contract: null
+};
+
+export default handleActions({
+  updateWallets: (state, action) => {
+    const { wallets, walletsAddresses, filterSubId } = action;
+
+    return {
+      ...state,
+      wallets, walletsAddresses, filterSubId
+    };
+  },
+
+  updateWalletsDetails: (state, action) => {
+    const { wallets } = action;
+    const prevWallets = state.wallets;
+
+    const nextWallets = { ...prevWallets };
+
+    Object.values(wallets).forEach((wallet) => {
+      const prevWallet = prevWallets[wallet.address] || {};
+
+      nextWallets[wallet.address] = {
+        instance: (state.contract && state.contract.instance) || null,
+        ...prevWallet,
+        ...wallet
+      };
+    });
+
+    return {
+      ...state,
+      wallets: nextWallets
+    };
+  },
+
+  setWalletContract: (state, action) => {
+    const { contract } = action;
+
+    return {
+      ...state,
+      contract
+    };
+  },
+
+  setOperationPendingState: (state, action) => {
+    const { address, operation, isPending } = action;
+    const { wallets } = state;
+
+    const wallet = { ...wallets[address] };
+
+    wallet.confirmations = wallet.confirmations.map((conf) => {
+      if (conf.operation === operation) {
+        conf.pending = isPending;
+      }
+
+      return conf;
+    });
+
+    return {
+      ...state,
+      wallets: {
+        ...wallets,
+        [ address ]: wallet
+      }
+    };
+  }
+}, initialState);

js/src/redux/reducers.js

@@ -17,7 +17,7 @@
 import { combineReducers } from 'redux';
 import { routerReducer } from 'react-router-redux';
 
-import { apiReducer, balancesReducer, blockchainReducer, compilerReducer, imagesReducer, personalReducer, signerReducer, statusReducer as nodeStatusReducer, snackbarReducer } from './providers';
+import { apiReducer, balancesReducer, blockchainReducer, compilerReducer, imagesReducer, personalReducer, signerReducer, statusReducer as nodeStatusReducer, snackbarReducer, walletReducer } from './providers';
 import certificationsReducer from './providers/certifications/reducer';
 
 import errorReducer from '~/ui/Errors/reducers';
@@ -40,6 +40,7 @@ export default function () {
     nodeStatus: nodeStatusReducer,
     personal: personalReducer,
     signer: signerReducer,
-    snackbar: snackbarReducer
+    snackbar: snackbarReducer,
+    wallet: walletReducer
   });
 }

js/src/redux/store.js

@@ -19,6 +19,8 @@ import { applyMiddleware, createStore } from 'redux';
 import initMiddleware from './middleware';
 import initReducers from './reducers';
 
+import { load as loadWallet } from './providers/walletActions';
+
 import {
   Balances as BalancesProvider,
   Personal as PersonalProvider,
@@ -40,5 +42,7 @@ export default function (api) {
   new SignerProvider(store, api).start();
   new StatusProvider(store, api).start();
 
+  store.dispatch(loadWallet(api));
+
   return store;
 }

js/src/ui/ConfirmDialog/confirmDialog.js

@@ -1,7 +1,25 @@
+// 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, { Component, PropTypes } from 'react';
 import ActionDone from 'material-ui/svg-icons/action/done';
 import ContentClear from 'material-ui/svg-icons/content/clear';
 
+import { nodeOrStringProptype } from '~/util/proptypes';
+
 import Button from '../Button';
 import Modal from '../Modal';
 
@@ -15,9 +33,7 @@ export default class ConfirmDialog extends Component {
     iconDeny: PropTypes.node,
     labelConfirm: PropTypes.string,
     labelDeny: PropTypes.string,
-    title: PropTypes.oneOfType([
+    title: nodeOrStringProptype().isRequired,
-      PropTypes.node, PropTypes.string
-    ]).isRequired,
     visible: PropTypes.bool.isRequired,
     onConfirm: PropTypes.func.isRequired,
     onDeny: PropTypes.func.isRequired

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

@@ -16,17 +16,15 @@
 
 import React, { Component, PropTypes } from 'react';
 
+import { nodeOrStringProptype } from '~/util/proptypes';
+
 import styles from './title.css';
 
 export default class Title extends Component {
   static propTypes = {
     className: PropTypes.string,
-    title: PropTypes.oneOfType([
+    title: nodeOrStringProptype(),
-      PropTypes.string, PropTypes.node
+    byline: nodeOrStringProptype()
-    ]),
-    byline: PropTypes.oneOfType([
-      PropTypes.string, PropTypes.node
-    ])
   }
 
   state = {

js/src/ui/Container/container.js

@@ -17,6 +17,8 @@
 import React, { Component, PropTypes } from 'react';
 import { Card } from 'material-ui/Card';
 
+import { nodeOrStringProptype } from '~/util/proptypes';
+
 import Title from './Title';
 
 import styles from './container.css';
@@ -28,9 +30,7 @@ export default class Container extends Component {
     compact: PropTypes.bool,
     light: PropTypes.bool,
     style: PropTypes.object,
-    title: PropTypes.oneOfType([
+    title: nodeOrStringProptype()
-      PropTypes.string, PropTypes.node
-    ])
   }
 
   render () {

js/src/ui/Errors/errors.js

@@ -60,7 +60,8 @@ class Errors extends Component {
           flexDirection: 'row',
           lineHeight: '1.5em',
           padding: '0.75em 0',
-          alignItems: 'center'
+          alignItems: 'center',
+          justifyContent: 'space-between'
         } }
       />
     );

js/src/ui/Form/AddressSelect/addressSelect.js

@@ -33,6 +33,7 @@ export default class AddressSelect extends Component {
     accounts: PropTypes.object,
     contacts: PropTypes.object,
     contracts: PropTypes.object,
+    wallets: PropTypes.object,
     label: PropTypes.string,
     hint: PropTypes.string,
     error: PropTypes.string,
@@ -49,8 +50,8 @@ export default class AddressSelect extends Component {
   }
 
   entriesFromProps (props = this.props) {
-    const { accounts, contacts, contracts } = props;
+    const { accounts, contacts, contracts, wallets } = props;
-    const entries = Object.assign({}, accounts || {}, contacts || {}, contracts || {});
+    const entries = Object.assign({}, accounts || {}, wallets || {}, contacts || {}, contracts || {});
     return entries;
   }
 

js/src/ui/Form/AutoComplete/autocomplete.js

@@ -120,7 +120,7 @@ export default class AutoComplete extends Component {
     switch (keycode(event)) {
       case 'down':
         const { menu } = muiAutocomplete.refs;
-        menu.handleKeyDown(event);
+        menu && menu.handleKeyDown(event);
         this.setState({ fakeBlur: true });
         break;
 
@@ -133,7 +133,7 @@ export default class AutoComplete extends Component {
         const e = new CustomEvent('down');
         e.which = 40;
 
-        muiAutocomplete.handleKeyDown(e);
+        muiAutocomplete && muiAutocomplete.handleKeyDown(e);
         break;
     }
   }

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

@@ -66,7 +66,8 @@ export default class Input extends Component {
       PropTypes.number, PropTypes.string
     ]),
     min: PropTypes.any,
-    max: PropTypes.any
+    max: PropTypes.any,
+    style: PropTypes.object
   };
 
   static defaultProps = {
@@ -74,11 +75,12 @@ export default class Input extends Component {
     readOnly: false,
     allowCopy: false,
     hideUnderline: false,
-    floatCopy: false
+    floatCopy: false,
+    style: {}
   }
 
   state = {
-    value: this.props.value || ''
+    value: typeof this.props.value === 'undefined' ? '' : this.props.value
   }
 
   componentWillReceiveProps (newProps) {
@@ -89,7 +91,8 @@ export default class Input extends Component {
 
   render () {
     const { value } = this.state;
-    const { children, className, hideUnderline, disabled, error, label, hint, multiLine, rows, type, min, max } = this.props;
+    const { children, className, hideUnderline, disabled, error, label } = this.props;
+    const { hint, multiLine, rows, type, min, max, style } = this.props;
 
     const readOnly = this.props.readOnly || disabled;
 
@@ -105,7 +108,7 @@ export default class Input extends Component {
     }
 
     return (
-      <div className={ styles.container }>
+      <div className={ styles.container } style={ style }>
         { this.renderCopyButton() }
         <TextField
           autoComplete='off'

js/src/ui/Form/InputAddress/inputAddress.css

@@ -21,12 +21,30 @@
 .input input {
   padding-left: 48px !important;
   box-sizing: border-box;
+
+  &.small {
+    padding-left: 40px !important;
+  }
 }
 
 .inputEmpty input {
   padding-left: 0 !important;
 }
 
+.small {
+  .input input {
+    padding-left: 40px !important;
+  }
+
+  .icon,
+  .iconDisabled {
+    img {
+      height: 24px;
+      width: 24px;
+    }
+  }
+}
+
 .icon,
 .iconDisabled {
   position: absolute;
@@ -35,6 +53,14 @@
   &.noLabel {
     top: 10px;
   }
+
+  &.noCopy {
+    left: 5px;
+  }
+
+  &.noUnderline {
+    top: 0;
+  }
 }
 
 .icon {

js/src/ui/Form/InputAddress/inputAddress.js

@@ -36,22 +36,38 @@ class InputAddress extends Component {
     tokens: PropTypes.object,
     text: PropTypes.bool,
     onChange: PropTypes.func,
-    onSubmit: PropTypes.func
+    onSubmit: PropTypes.func,
+    hideUnderline: PropTypes.bool,
+    allowCopy: PropTypes.bool,
+    small: PropTypes.bool
+  };
+
+  static defaultProps = {
+    allowCopy: true,
+    hideUnderline: false,
+    small: false
   };
 
   render () {
-    const { className, disabled, error, label, hint, value, text, onSubmit, accountsInfo, tokens } = this.props;
+    const { className, disabled, error, label, hint, value, text } = this.props;
+    const { small, allowCopy, hideUnderline, onSubmit, accountsInfo, tokens } = this.props;
 
     const account = accountsInfo[value] || tokens[value];
-    const hasAccount = account && (!account.meta || !account.meta.deleted);
+    const hasAccount = account && !(account.meta && account.meta.deleted);
 
     const icon = this.renderIcon();
 
     const classes = [ className ];
     classes.push(!icon ? styles.inputEmpty : styles.input);
 
+    const containerClasses = [ styles.container ];
+
+    if (small) {
+      containerClasses.push(styles.small);
+    }
+
     return (
-      <div className={ styles.container }>
+      <div className={ containerClasses.join(' ') }>
         <Input
           className={ classes.join(' ') }
           disabled={ disabled }
@@ -61,7 +77,8 @@ class InputAddress extends Component {
           value={ text && hasAccount ? account.name : value }
           onChange={ this.handleInputChange }
           onSubmit={ onSubmit }
-          allowCopy={ disabled ? value : false }
+          allowCopy={ allowCopy && (disabled ? value : false) }
+          hideUnderline={ hideUnderline }
         />
         { icon }
       </div>
@@ -69,7 +86,7 @@ class InputAddress extends Component {
   }
 
   renderIcon () {
-    const { value, disabled, label } = this.props;
+    const { value, disabled, label, allowCopy, hideUnderline } = this.props;
 
     if (!value || !value.length || !util.isAddressValid(value)) {
       return null;
@@ -81,6 +98,14 @@ class InputAddress extends Component {
       classes.push(styles.noLabel);
     }
 
+    if (!allowCopy) {
+      classes.push(styles.noCopy);
+    }
+
+    if (hideUnderline) {
+      classes.push(styles.noUnderline);
+    }
+
     return (
       <div className={ classes.join(' ') }>
         <IdentityIcon

js/src/ui/Form/InputAddressSelect/inputAddressSelect.js

@@ -25,6 +25,7 @@ class InputAddressSelect extends Component {
     accounts: PropTypes.object.isRequired,
     contacts: PropTypes.object.isRequired,
     contracts: PropTypes.object.isRequired,
+    wallets: PropTypes.object.isRequired,
     error: PropTypes.string,
     label: PropTypes.string,
     hint: PropTypes.string,
@@ -33,7 +34,7 @@ class InputAddressSelect extends Component {
   };
 
   render () {
-    const { accounts, contacts, contracts, label, hint, error, value, onChange } = this.props;
+    const { accounts, contacts, contracts, wallets, label, hint, error, value, onChange } = this.props;
 
     return (
       <AddressSelect
@@ -41,6 +42,7 @@ class InputAddressSelect extends Component {
         accounts={ accounts }
         contacts={ contacts }
         contracts={ contracts }
+        wallets={ wallets }
         error={ error }
         label={ label }
         hint={ hint }
@@ -51,12 +53,13 @@ class InputAddressSelect extends Component {
 }
 
 function mapStateToProps (state) {
-  const { accounts, contacts, contracts } = state.personal;
+  const { accounts, contacts, contracts, wallets } = state.personal;
 
   return {
     accounts,
     contacts,
-    contracts
+    contracts,
+    wallets
   };
 }
 

js/src/ui/Form/InputInline/inputInline.js

@@ -16,6 +16,8 @@
 
 import React, { Component, PropTypes } from 'react';
 
+import { nodeOrStringProptype } from '~/util/proptypes';
+
 import Input from '../Input';
 
 import styles from './inputInline.css';
@@ -33,9 +35,7 @@ export default class InputInline extends Component {
     value: PropTypes.oneOfType([
       PropTypes.number, PropTypes.string
     ]),
-    static: PropTypes.oneOfType([
+    static: nodeOrStringProptype()
-      PropTypes.node, PropTypes.string
-    ])
   }
 
   state = {

js/src/ui/Form/RadioButtons/radioButtons.js

@@ -37,7 +37,10 @@ export default class RadioButtons extends Component {
   render () {
     const { value, values } = this.props;
 
-    const index = parseInt(value);
+    const index = Number.isNaN(parseInt(value))
+      ? values.findIndex((val) => val.key === value)
+      : parseInt(value);
+
     const selectedValue = typeof value !== 'object' ? values[index] : value;
     const key = this.getKey(selectedValue, index);
 

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

@@ -34,12 +34,20 @@ export default class TypedInput extends Component {
 
   static propTypes = {
     onChange: PropTypes.func.isRequired,
-    accounts: PropTypes.object.isRequired,
     param: PropTypes.object.isRequired,
 
+    accounts: PropTypes.object,
     error: PropTypes.any,
     value: PropTypes.any,
-    label: PropTypes.string
+    label: PropTypes.string,
+    hint: PropTypes.string,
+    min: PropTypes.number,
+    max: PropTypes.number
+  };
+
+  static defaultProps = {
+    min: null,
+    max: null
   };
 
   render () {
@@ -89,16 +97,22 @@ export default class TypedInput extends Component {
     };
 
     const style = {
-      width: 32,
+      width: 24,
-      height: 32,
+      height: 24,
       padding: 0
     };
 
+    const plusStyle = {
+      ...style,
+      backgroundColor: 'rgba(255, 255, 255, 0.25)',
+      borderRadius: '50%'
+    };
+
     return (
-      <div>
+      <div style={ { marginTop: '0.75em' } }>
         <IconButton
           iconStyle={ iconStyle }
-          style={ style }
+          style={ plusStyle }
           onTouchTap={ this.onAddField }
         >
           <AddIcon />
@@ -144,26 +158,29 @@ export default class TypedInput extends Component {
   }
 
   renderNumber () {
-    const { label, value, error, param } = this.props;
+    const { label, value, error, param, hint, min, max } = this.props;
 
     return (
       <Input
         label={ label }
+        hint={ hint }
         value={ value }
         error={ error }
-        onSubmit={ this.onSubmit }
+        onChange={ this.onChange }
         type='number'
-        min={ param.signed ? null : 0 }
+        min={ min !== null ? min : (param.signed ? null : 0) }
+        max={ max !== null ? max : null }
       />
     );
   }
 
   renderDefault () {
-    const { label, value, error } = this.props;
+    const { label, value, error, hint } = this.props;
 
     return (
       <Input
         label={ label }
+        hint={ hint }
         value={ value }
         error={ error }
         onSubmit={ this.onSubmit }
@@ -172,12 +189,13 @@ export default class TypedInput extends Component {
   }
 
   renderAddress () {
-    const { accounts, label, value, error } = this.props;
+    const { accounts, label, value, error, hint } = this.props;
 
     return (
       <InputAddressSelect
         accounts={ accounts }
         label={ label }
+        hint={ hint }
         value={ value }
         error={ error }
         onChange={ this.onChange }
@@ -187,7 +205,7 @@ export default class TypedInput extends Component {
   }
 
   renderBoolean () {
-    const { label, value, error } = this.props;
+    const { label, value, error, hint } = this.props;
 
     const boolitems = ['false', 'true'].map((bool) => {
       return (
@@ -204,6 +222,7 @@ export default class TypedInput extends Component {
     return (
       <Select
         label={ label }
+        hint={ hint }
         value={ value ? 'true' : 'false' }
         error={ error }
         onChange={ this.onChangeBool }

js/src/ui/MethodDecoding/methodDecoding.js

@@ -457,6 +457,14 @@ class MethodDecoding extends Component {
       return;
     }
 
+    const { signature, paramdata } = api.util.decodeCallData(input);
+    this.setState({ methodSignature: signature, methodParams: paramdata });
+
+    if (!signature || signature === CONTRACT_CREATE || transaction.creates) {
+      this.setState({ isDeploy: true });
+      return;
+    }
+
     if (contractAddress === '0x') {
       return;
     }
@@ -472,14 +480,6 @@ class MethodDecoding extends Component {
           return;
         }
 
-        const { signature, paramdata } = api.util.decodeCallData(input);
-        this.setState({ methodSignature: signature, methodParams: paramdata });
-
-        if (!signature || signature === CONTRACT_CREATE || transaction.creates) {
-          this.setState({ isDeploy: true });
-          return;
-        }
-
         return Contracts.get()
           .signatureReg
           .lookup(signature)

js/src/ui/Modal/Title/title.js

@@ -18,6 +18,8 @@ import React, { Component, PropTypes } from 'react';
 import { LinearProgress } from 'material-ui';
 import { Step, Stepper, StepLabel } from 'material-ui/Stepper';
 
+import { nodeOrStringProptype } from '~/util/proptypes';
+
 import styles from '../modal.css';
 
 export default class Title extends Component {
@@ -26,9 +28,7 @@ export default class Title extends Component {
     current: PropTypes.number,
     steps: PropTypes.array,
     waiting: PropTypes.array,
-    title: React.PropTypes.oneOfType([
+    title: nodeOrStringProptype()
-      PropTypes.node, PropTypes.string
-    ])
   }
 
   render () {

js/src/ui/Modal/modal.js

@@ -19,6 +19,8 @@ import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
 import { Dialog } from 'material-ui';
 
+import { nodeOrStringProptype } from '~/util/proptypes';
+
 import Container from '../Container';
 import Title from './Title';
 
@@ -42,9 +44,7 @@ class Modal extends Component {
     current: PropTypes.number,
     waiting: PropTypes.array,
     steps: PropTypes.array,
-    title: PropTypes.oneOfType([
+    title: nodeOrStringProptype(),
-      PropTypes.node, PropTypes.string
-    ]),
     visible: PropTypes.bool.isRequired,
     settings: PropTypes.object.isRequired
   }

js/src/ui/TxList/txList.js

@@ -39,14 +39,20 @@ export class TxRow extends Component {
     address: PropTypes.string.isRequired,
     isTest: PropTypes.bool.isRequired,
 
-    block: PropTypes.object
+    block: PropTypes.object,
+    historic: PropTypes.bool,
+    className: PropTypes.string
+  };
+
+  static defaultProps = {
+    historic: true
   };
 
   render () {
-    const { tx, address, isTest } = this.props;
+    const { tx, address, isTest, historic, className } = this.props;
 
     return (
-      <tr>
+      <tr className={ className || '' }>
         { this.renderBlockNumber(tx.blockNumber) }
         { this.renderAddress(tx.from) }
         <td className={ styles.transaction }>
@@ -64,7 +70,7 @@ export class TxRow extends Component {
         { this.renderAddress(tx.to) }
         <td className={ styles.method }>
           <MethodDecoding
-            historic
+            historic={ historic }
             address={ address }
             transaction={ tx } />
         </td>

js/src/util/proptypes.js

@@ -0,0 +1,31 @@
+// 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 { PropTypes } from 'react';
+
+export function nullableProptype (type) {
+  return PropTypes.oneOfType([
+    PropTypes.oneOf([ null ]),
+    type
+  ]);
+}
+
+export function nodeOrStringProptype () {
+  return PropTypes.oneOfType([
+    PropTypes.node,
+    PropTypes.string
+  ]);
+}

js/src/util/wallets.js

@@ -0,0 +1,107 @@
+// 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 { range } from 'lodash';
+
+import { bytesToHex, toHex } from '~/api/util/format';
+
+export default class WalletsUtils {
+
+  static fetchRequire (walletContract) {
+    return walletContract.instance.m_required.call();
+  }
+
+  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 ])));
+      });
+  }
+
+  static fetchDailylimit (walletContract) {
+    const walletInstance = walletContract.instance;
+
+    return Promise
+      .all([
+        walletInstance.m_dailyLimit.call(),
+        walletInstance.m_spentToday.call(),
+        walletInstance.m_lastDay.call()
+      ])
+      .then(([ limit, spent, last ]) => ({
+        limit, spent, last
+      }));
+  }
+
+  static fetchTransactions (walletContract) {
+    const walletInstance = walletContract.instance;
+    const signatures = {
+      single: toHex(walletInstance.SingleTransact.signature),
+      multi: toHex(walletInstance.MultiTransact.signature),
+      deposit: toHex(walletInstance.Deposit.signature)
+    };
+
+    return walletContract
+      .getAllLogs({
+        topics: [ [ signatures.single, signatures.multi, signatures.deposit ] ]
+      })
+      .then((logs) => {
+        return logs.sort((logA, logB) => {
+          const comp = logB.blockNumber.comparedTo(logA.blockNumber);
+
+          if (comp !== 0) {
+            return comp;
+          }
+
+          return logB.transactionIndex.comparedTo(logA.transactionIndex);
+        });
+      })
+      .then((logs) => {
+        const transactions = logs.map((log) => {
+          const signature = toHex(log.topics[0]);
+
+          const value = log.params.value.value;
+          const from = signature === signatures.deposit
+            ? log.params['_from'].value
+            : walletContract.address;
+
+          const to = signature === signatures.deposit
+            ? walletContract.address
+            : log.params.to.value;
+
+          const transaction = {
+            transactionHash: log.transactionHash,
+            blockNumber: log.blockNumber,
+            from, to, value
+          };
+
+          if (log.params.operation) {
+            transaction.operation = bytesToHex(log.params.operation.value);
+          }
+
+          if (log.params.data) {
+            transaction.data = log.params.data.value;
+          }
+
+          return transaction;
+        });
+
+        return transactions;
+      });
+  }
+
+}

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

@@ -25,16 +25,23 @@ import styles from './header.css';
 export default class Header extends Component {
   static contextTypes = {
     api: PropTypes.object
-  }
+  };
 
   static propTypes = {
     account: PropTypes.object,
-    balance: PropTypes.object
+    balance: PropTypes.object,
-  }
+    className: PropTypes.string,
+    children: PropTypes.node
+  };
+
+  static defaultProps = {
+    className: '',
+    children: null
+  };
 
   render () {
     const { api } = this.context;
-    const { account, balance } = this.props;
+    const { account, balance, className, children } = this.props;
     const { address, meta, uuid } = account;
 
     if (!account) {
@@ -46,7 +53,7 @@ export default class Header extends Component {
       : <div className={ styles.uuidline }>uuid: { uuid }</div>;
 
     return (
-      <div>
+      <div className={ className }>
         <Container>
           <IdentityIcon
             address={ address } />
@@ -74,6 +81,7 @@ export default class Header extends Component {
               dappsUrl={ api.dappsUrl }
             />
           </div>
+          { children }
         </Container>
       </div>
     );
@@ -88,6 +96,10 @@ export default class Header extends Component {
 
     const { txCount } = balance;
 
+    if (!txCount) {
+      return null;
+    }
+
     return (
       <div className={ styles.infoline }>
         { txCount.toFormat() } outgoing transactions

js/src/views/Accounts/accounts.js

@@ -21,7 +21,7 @@ import ContentAdd from 'material-ui/svg-icons/content/add';
 import { uniq, isEqual } from 'lodash';
 
 import List from './List';
-import { CreateAccount } from '~/modals';
+import { CreateAccount, CreateWallet } from '~/modals';
 import { Actionbar, ActionbarExport, ActionbarSearch, ActionbarSort, Button, Page, Tooltip } from '~/ui';
 import { setVisibleAccounts } from '~/redux/providers/personalActions';
 
@@ -34,15 +34,18 @@ class Accounts extends Component {
 
   static propTypes = {
     setVisibleAccounts: PropTypes.func.isRequired,
+    accounts: PropTypes.object.isRequired,
+    hasAccounts: PropTypes.bool.isRequired,
+    wallets: PropTypes.object.isRequired,
+    hasWallets: PropTypes.bool.isRequired,
 
-    accounts: PropTypes.object,
-    hasAccounts: PropTypes.bool,
     balances: PropTypes.object
   }
 
   state = {
     addressBook: false,
     newDialog: false,
+    newWalletDialog: false,
     sortOrder: '',
     searchValues: [],
     searchTokens: [],
@@ -58,8 +61,8 @@ class Accounts extends Component {
   }
 
   componentWillReceiveProps (nextProps) {
-    const prevAddresses = Object.keys(this.props.accounts);
+    const prevAddresses = Object.keys({ ...this.props.accounts, ...this.props.wallets });
-    const nextAddresses = Object.keys(nextProps.accounts);
+    const nextAddresses = Object.keys({ ...nextProps.accounts, ...nextProps.wallets });
 
     if (prevAddresses.length !== nextAddresses.length || !isEqual(prevAddresses.sort(), nextAddresses.sort())) {
       this.setVisibleAccounts(nextProps);
@@ -71,8 +74,8 @@ class Accounts extends Component {
   }
 
   setVisibleAccounts (props = this.props) {
-    const { accounts, setVisibleAccounts } = props;
+    const { accounts, wallets, setVisibleAccounts } = props;
-    const addresses = Object.keys(accounts);
+    const addresses = Object.keys({ ...accounts, ...wallets });
     setVisibleAccounts(addresses);
   }
 
@@ -80,17 +83,24 @@ class Accounts extends Component {
     return (
       <div className={ styles.accounts }>
         { this.renderNewDialog() }
+        { this.renderNewWalletDialog() }
         { this.renderActionbar() }
 
-        { this.state.show ? this.renderAccounts() : this.renderLoading() }
+        <Page>
+          <Tooltip
+            className={ styles.accountTooltip }
+            text='your accounts are visible for easy access, allowing you to edit the meta information, make transfers, view transactions and fund the account'
+          />
+
+          { this.renderWallets() }
+          { this.renderAccounts() }
+        </Page>
       </div>
     );
   }
 
-  renderLoading () {
+  renderLoading (object) {
-    const { accounts } = this.props;
+    const loadings = ((object && Object.keys(object)) || []).map((_, idx) => (
-
-    const loadings = ((accounts && Object.keys(accounts)) || []).map((_, idx) => (
       <div key={ idx } className={ styles.loading }>
         <div />
       </div>
@@ -104,11 +114,14 @@ class Accounts extends Component {
   }
 
   renderAccounts () {
+    if (!this.state.show) {
+      return this.renderLoading(this.props.accounts);
+    }
+
     const { accounts, hasAccounts, balances } = this.props;
     const { searchValues, sortOrder } = this.state;
 
     return (
-      <Page>
       <List
         search={ searchValues }
         accounts={ accounts }
@@ -116,10 +129,27 @@ class Accounts extends Component {
         empty={ !hasAccounts }
         order={ sortOrder }
         handleAddSearchToken={ this.onAddSearchToken } />
-        <Tooltip
+    );
-          className={ styles.accountTooltip }
+  }
-          text='your accounts are visible for easy access, allowing you to edit the meta information, make transfers, view transactions and fund the account' />
+
-      </Page>
+  renderWallets () {
+    if (!this.state.show) {
+      return this.renderLoading(this.props.wallets);
+    }
+
+    const { wallets, hasWallets, balances } = this.props;
+    const { searchValues, sortOrder } = this.state;
+
+    return (
+      <List
+        link='wallet'
+        search={ searchValues }
+        accounts={ wallets }
+        balances={ balances }
+        empty={ !hasWallets }
+        order={ sortOrder }
+        handleAddSearchToken={ this.onAddSearchToken }
+      />
     );
   }
 
@@ -160,6 +190,12 @@ class Accounts extends Component {
         label='new account'
         onClick={ this.onNewAccountClick } />,
 
+      <Button
+        key='newWallet'
+        icon={ <ContentAdd /> }
+        label='new wallet'
+        onClick={ this.onNewWalletClick } />,
+
       <ActionbarExport
         key='exportAccounts'
         content={ accounts }
@@ -198,6 +234,22 @@ class Accounts extends Component {
     );
   }
 
+  renderNewWalletDialog () {
+    const { accounts } = this.props;
+    const { newWalletDialog } = this.state;
+
+    if (!newWalletDialog) {
+      return null;
+    }
+
+    return (
+      <CreateWallet
+        accounts={ accounts }
+        onClose={ this.onNewWalletClose }
+      />
+    );
+  }
+
   onAddSearchToken = (token) => {
     const { searchTokens } = this.state;
     const newSearchTokens = uniq([].concat(searchTokens, token));
@@ -210,21 +262,33 @@ class Accounts extends Component {
     });
   }
 
+  onNewWalletClick = () => {
+    this.setState({
+      newWalletDialog: !this.state.newWalletDialog
+    });
+  }
+
   onNewAccountClose = () => {
     this.onNewAccountClick();
   }
 
+  onNewWalletClose = () => {
+    this.onNewWalletClick();
+  }
+
   onNewAccountUpdate = () => {
   }
 }
 
 function mapStateToProps (state) {
-  const { accounts, hasAccounts } = state.personal;
+  const { accounts, hasAccounts, wallets, hasWallets } = state.personal;
   const { balances } = state.balances;
 
   return {
     accounts,
     hasAccounts,
+    wallets,
+    hasWallets,
     balances
   };
 }

js/src/views/Address/Delete/delete.js

@@ -19,7 +19,7 @@ import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
 
 import { ConfirmDialog, IdentityIcon, IdentityName } from '~/ui';
-import { newError } from '../../../redux/actions';
+import { newError } from '~/redux/actions';
 
 import styles from '../address.css';
 
@@ -27,16 +27,17 @@ class Delete extends Component {
   static contextTypes = {
     api: PropTypes.object.isRequired,
     router: PropTypes.object
-  }
+  };
 
   static propTypes = {
+    route: PropTypes.string.isRequired,
+
     address: PropTypes.string,
     account: PropTypes.object,
-    route: PropTypes.string.isRequired,
     visible: PropTypes.bool,
     onClose: PropTypes.func,
     newError: PropTypes.func
-  }
+  };
 
   render () {
     const { account, visible } = this.props;

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

@@ -28,6 +28,7 @@ import imagesEthcoreBlock from '../../../../assets/images/parity-logo-white-no-t
 
 const TABMAP = {
   accounts: 'account',
+  wallet: 'account',
   addresses: 'address',
   apps: 'app',
   contracts: 'contract',

js/src/views/Contract/contract.js

@@ -23,7 +23,7 @@ import ContentCreate from 'material-ui/svg-icons/content/create';
 import EyeIcon from 'material-ui/svg-icons/image/remove-red-eye';
 import ContentClear from 'material-ui/svg-icons/content/clear';
 
-import { newError } from '../../redux/actions';
+import { newError } from '~/redux/actions';
 import { setVisibleAccounts } from '~/redux/providers/personalActions';
 
 import { EditMeta, ExecuteContract } from '~/modals';

js/src/views/Dapps/dappsStore.js

@@ -19,7 +19,7 @@ import { action, computed, observable, transaction } from 'mobx';
 import store from 'store';
 
 import Contracts from '~/contracts';
-import { hashToImageUrl } from '../../redux/util';
+import { hashToImageUrl } from '~/redux/util';
 
 import builtinApps from './builtin.json';
 

js/src/views/Signer/components/TransactionMainDetails/TransactionMainDetails.js

@@ -18,7 +18,7 @@ import React, { Component, PropTypes } from 'react';
 
 import ReactTooltip from 'react-tooltip';
 
-import { MethodDecoding } from '../../../../ui';
+import { MethodDecoding } from '~/ui';
 
 import * as tUtil from '../util/transaction';
 import Account from '../Account';