js-precompiled 20170727-171407

* Light client improvements (#6156)

* no seal checking

* import command and --no-seal-check for light client

* fix eth_call

* tweak registry dapps lookup

* ignore failed requests to non-server peers

* Fix connecting to wildcard addresses. (#6167)

* Don't display an overlay in case the time sync check fails. (#6164)

* Small improvements to time estimation.

* Temporarily disable NTP time check by default.

.gitlab-ci.yml

@@ -77,8 +77,10 @@ linux-snap:
     - echo "Version:"$VER
     - snapcraft
     - ls
-    - cp "parity_"$CI_BUILD"_REF_NAME_amd64.snap" "parity_"$VER"_amd64.snap"
+    #- cp "parity_"$CI_BUILD"_amd64.snap" "parity_"$VER"_amd64.snap"
     - md5sum "parity_"$VER"_amd64.snap" > "parity_"$VER"_amd64.snap.md5"
+    - file "parity_"$VER"_amd64.snap.md5"
+    - cat "parity_"$VER"_amd64.snap.md5"
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
     - if [[ $CI_BUILD_REF_NAME =~ ^(master|beta|stable|nightly)$ ]]; then export S3_BUCKET=builds-parity-published; else export S3_BUCKET=builds-parity; fi
@@ -561,11 +563,9 @@ docker-build:
     - docker info
   script:
     - if [ "$CI_BUILD_REF_NAME" == "beta-release" ]; then DOCKER_TAG="latest"; else DOCKER_TAG=$CI_BUILD_REF_NAME; fi
-    - docker login -u $Docker_Hub_User -p $Docker_Hub_Pass
-    - sh scripts/docker-build.sh $DOCKER_TAG ethcore
-    - docker logout
+    - echo "Tag:" $DOCKER_TAG
     - docker login -u $Docker_Hub_User_Parity -p $Docker_Hub_Pass_Parity
-    - sh scripts/docker-build.sh $DOCKER_TAG parity
+    - sh scripts/docker-build.sh $DOCKER_TAG
     - docker logout
   tags:
     - docker

Cargo.lock

@@ -1950,7 +1950,7 @@ name = "parity-ui"
 version = "1.7.0"
 dependencies = [
  "parity-ui-dev 1.7.0",
- "parity-ui-precompiled 1.4.0 (git+https://github.com/paritytech/js-precompiled.git)",
+ "parity-ui-precompiled 1.4.0 (git+https://github.com/paritytech/js-precompiled.git?branch=beta)",
  "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1964,7 +1964,7 @@ dependencies = [
 [[package]]
 name = "parity-ui-precompiled"
 version = "1.4.0"
-source = "git+https://github.com/paritytech/js-precompiled.git#b49a1d46cc6c545403d18579ef7ae9f9d14eea7e"
+source = "git+https://github.com/paritytech/js-precompiled.git?branch=beta#917d53323bb0a5c1aeeeea651695897be854a239"
 dependencies = [
  "parity-dapps-glue 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -3200,7 +3200,7 @@ dependencies = [
 "checksum owning_ref 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "cdf84f41639e037b484f93433aa3897863b561ed65c6e59c7073d7c561710f37"
 "checksum parity-dapps-glue 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e1d06f6ee0fda786df3784a96ee3f0629f529b91cbfb7d142f6410e6bcd1ce2c"
 "checksum parity-tokio-ipc 0.1.5 (git+https://github.com/nikvolf/parity-tokio-ipc)" = "<none>"
-"checksum parity-ui-precompiled 1.4.0 (git+https://github.com/paritytech/js-precompiled.git)" = "<none>"
+"checksum parity-ui-precompiled 1.4.0 (git+https://github.com/paritytech/js-precompiled.git?branch=beta)" = "<none>"
 "checksum parity-wasm 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)" = "51104c8b8da5cd0ebe0ab765dfab37bc1927b4a01a3d870b0fe09d9ee65e35ea"
 "checksum parity-wordlist 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "52142d717754f7ff7ef0fc8da1bdce4f302dd576fb9bf8b727d6a5fdef33348d"
 "checksum parking_lot 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "aebb68eebde2c99f89592d925288600fde220177e46b5c9a91ca218d245aeedf"

dapps/src/api/time.rs

@@ -100,6 +100,10 @@ impl SimpleNtp {
 impl Ntp for SimpleNtp {
 	fn drift(&self) -> BoxFuture<Duration, Error> {
 		let address = self.address.clone();
+		if &*address == "none" {
+			return futures::future::err(Error::Ntp("NTP server is not provided.".into())).boxed();
+		}
+
 		self.pool.spawn_fn(move || {
 			let packet = ntp::request(&*address)?;
 			let dest_time = ::time::now_utc().to_timespec();
@@ -114,7 +118,9 @@ impl Ntp for SimpleNtp {
 	}
 }
 
-const MAX_RESULTS: usize = 4;
+// NOTE In a positive scenario first results will be seen after:
+// MAX_RESULTS * UPDATE_TIMEOUT_OK_SECS seconds.
+const MAX_RESULTS: usize = 7;
 const UPDATE_TIMEOUT_OK_SECS: u64 = 30;
 const UPDATE_TIMEOUT_ERR_SECS: u64 = 2;
 
@@ -225,7 +231,7 @@ mod tests {
 
 	fn time_checker() -> TimeChecker<FakeNtp> {
 		let last_result = Arc::new(RwLock::new(
-			(Instant::now(), vec![Err(Error::Ntp("NTP server unavailable.".into()))].into())
+			(Instant::now(), vec![Err(Error::Ntp("NTP server unavailable".into()))].into())
 		));
 
 		TimeChecker {

dapps/src/handlers/mod.rs

@@ -68,6 +68,9 @@ pub fn add_security_headers(headers: &mut header::Headers, embeddable_on: Embedd
 		b"font-src 'self' data: https:;".to_vec(),
 		// Allow inline scripts and scripts eval (webpack/jsconsole)
 		b"script-src 'self' 'unsafe-inline' 'unsafe-eval';".to_vec(),
+		// Same restrictions as script-src (fallback) with additional
+		// blob: that is required for camera access (worker)
+		b"worker-src 'self' 'unsafe-inline' 'unsafe-eval' blob: ;".to_vec(),
 		// Restrict everything else to the same origin.
 		b"default-src 'self';".to_vec(),
 		// Run in sandbox mode (although it's not fully safe since we allow same-origin and script)
@@ -140,4 +143,3 @@ pub fn convert_uri_to_url(uri: &uri::RequestUri, host: Option<&header::Host>) ->
 		_ => None,
 	}
 }
-

dapps/ui/Cargo.toml

@@ -12,7 +12,7 @@ rustc_version = "0.1"
 [dependencies]
 parity-ui-dev = { path = "../../js", optional = true }
 # This is managed by the js/scripts/release.sh script on CI - keep it in a single line
-parity-ui-precompiled = { git = "https://github.com/paritytech/js-precompiled.git", optional = true, branch = "master" }
+parity-ui-precompiled = { git = "https://github.com/paritytech/js-precompiled.git", optional = true, branch = "beta" }
 
 [features]
 no-precompiled-js = ["parity-ui-dev"]

docker/hub/Dockerfile

@@ -4,7 +4,7 @@ WORKDIR /build
 #ENV for build TAG
 ARG BUILD_TAG
 ENV BUILD_TAG ${BUILD_TAG:-master}
-RUN echo $BUILD_TAG
+RUN echo "Build tag:" $BUILD_TAG
 # install tools and dependencies
 RUN apt-get update && \
         apt-get install -y --force-yes --no-install-recommends \
@@ -48,7 +48,7 @@ RUN apt-get update && \
 # show backtraces
  RUST_BACKTRACE=1 && \
 # build parity
- cd /build&&git clone https://github.com/paritytech/parity && \
+cd /build&&git clone https://github.com/paritytech/parity && \
         cd parity && \
 	git pull&& \
 	git checkout $BUILD_TAG && \

ethcore/evm/src/interpreter/mod.rs

@@ -211,6 +211,7 @@ impl<Cost: CostType> Interpreter<Cost> {
 		if (instruction == instructions::DELEGATECALL && !schedule.have_delegate_call) ||
 			(instruction == instructions::CREATE2 && !schedule.have_create2) ||
 			(instruction == instructions::STATICCALL && !schedule.have_static_call) ||
+			((instruction == instructions::RETURNDATACOPY || instruction == instructions::RETURNDATASIZE) && !schedule.have_return_data) ||
 			(instruction == instructions::REVERT && !schedule.have_revert) {
 
 			return Err(evm::Error::BadInstruction {

ethcore/evm/src/schedule.rs

@@ -107,6 +107,8 @@ pub struct Schedule {
 	pub blockhash_gas: usize,
 	/// Static Call opcode enabled.
 	pub have_static_call: bool,
+	/// RETURNDATA and RETURNDATASIZE opcodes enabled.
+	pub have_return_data: bool,
 	/// Kill basic accounts below this balance if touched.
 	pub kill_dust: CleanDustMode,
 }
@@ -140,6 +142,7 @@ impl Schedule {
 			have_delegate_call: true,
 			have_create2: false,
 			have_revert: false,
+			have_return_data: false,
 			stack_limit: 1024,
 			max_depth: 1024,
 			tier_step_gas: [0, 2, 3, 5, 8, 10, 20, 0],
@@ -190,6 +193,7 @@ impl Schedule {
 		schedule.have_create2 = true;
 		schedule.have_revert = true;
 		schedule.have_static_call = true;
+		schedule.have_return_data = true;
 		schedule.blockhash_gas = 350;
 		schedule
 	}
@@ -200,6 +204,7 @@ impl Schedule {
 			have_delegate_call: hdc,
 			have_create2: false,
 			have_revert: false,
+			have_return_data: false,
 			stack_limit: 1024,
 			max_depth: 1024,
 			tier_step_gas: [0, 2, 3, 5, 8, 10, 20, 0],

ethcore/light/src/client/header_chain.rs

@@ -405,6 +405,7 @@ impl HeaderChain {
 
 		match id {
 			BlockId::Earliest | BlockId::Number(0) => Some(self.genesis_header.clone()),
+			BlockId::Hash(hash) if hash == self.genesis_hash() => { Some(self.genesis_header.clone()) }
 			BlockId::Hash(hash) => load_from_db(hash),
 			BlockId::Number(num) => {
 				if self.best_block.read().number < num { return None }
@@ -781,4 +782,18 @@ mod tests {
 		assert_eq!(chain.block_header(BlockId::Latest).unwrap().number(), 10);
 		assert!(chain.candidates.read().get(&100).is_some())
 	}
+
+	#[test]
+	fn genesis_header_available() {
+		let spec = Spec::new_test();
+		let genesis_header = spec.genesis_header();
+		let db = make_db();
+		let cache = Arc::new(Mutex::new(Cache::new(Default::default(), Duration::hours(6))));
+
+		let chain = HeaderChain::new(db.clone(), None, &::rlp::encode(&genesis_header), cache.clone()).unwrap();
+
+		assert!(chain.block_header(BlockId::Earliest).is_some());
+		assert!(chain.block_header(BlockId::Number(0)).is_some());
+		assert!(chain.block_header(BlockId::Hash(genesis_header.hash())).is_some());
+	}
 }

ethcore/light/src/client/mod.rs

@@ -58,6 +58,8 @@ pub struct Config {
 	pub db_wal: bool,
 	/// Should it do full verification of blocks?
 	pub verify_full: bool,
+	/// Should it check the seal of blocks?
+	pub check_seal: bool,
 }
 
 impl Default for Config {
@@ -69,6 +71,7 @@ impl Default for Config {
 			db_compaction: CompactionProfile::default(),
 			db_wal: true,
 			verify_full: true,
+			check_seal: true,
 		}
 	}
 }
@@ -168,7 +171,7 @@ impl Client {
 		let gh = ::rlp::encode(&spec.genesis_header());
 
 		Ok(Client {
-			queue: HeaderQueue::new(config.queue, spec.engine.clone(), io_channel, true),
+			queue: HeaderQueue::new(config.queue, spec.engine.clone(), io_channel, config.check_seal),
 			engine: spec.engine.clone(),
 			chain: HeaderChain::new(db.clone(), chain_col, &gh, cache)?,
 			report: RwLock::new(ClientReport::default()),
@@ -282,6 +285,7 @@ impl Client {
 		let mut good = Vec::new();
 		for verified_header in self.queue.drain(MAX) {
 			let (num, hash) = (verified_header.number(), verified_header.hash());
+			trace!(target: "client", "importing block {}", num);
 
 			if self.verify_full && !self.check_header(&mut bad, &verified_header) {
 				continue
@@ -381,13 +385,17 @@ impl Client {
 		}
 	}
 
-	// return true if should skip, false otherwise. may push onto bad if
+	// return false if should skip, true otherwise. may push onto bad if
 	// should skip.
 	fn check_header(&self, bad: &mut Vec<H256>, verified_header: &Header) -> bool {
 		let hash = verified_header.hash();
 		let parent_header = match self.chain.block_header(BlockId::Hash(*verified_header.parent_hash())) {
 			Some(header) => header,
-			None => return false, // skip import of block with missing parent.
+			None => {
+				trace!(target: "client", "No parent for block ({}, {})",
+					verified_header.number(), hash);
+				return false // skip import of block with missing parent.
+			}
 		};
 
 		// Verify Block Family

ethcore/light/src/net/mod.rs

@@ -806,6 +806,9 @@ impl LightProtocol {
 		trace!(target: "pip", "Connected peer with chain head {:?}", (status.head_hash, status.head_num));
 
 		if (status.network_id, status.genesis_hash) != (self.network_id, self.genesis_hash) {
+			trace!(target: "pip", "peer {} wrong network: network_id is {} vs our {}, gh is {} vs our {}",
+				peer, status.network_id, self.network_id, status.genesis_hash, self.genesis_hash);
+
 			return Err(Error::WrongNetwork);
 		}
 

ethcore/light/src/on_demand/mod.rs

@@ -54,13 +54,21 @@ struct Peer {
 }
 
 impl Peer {
-	// whether this peer can fulfill the
-	fn can_fulfill(&self, c: &Capabilities) -> bool {
-		let caps = &self.capabilities;
+	// whether this peer can fulfill the necessary capabilities for the given
+	// request.
+	fn can_fulfill(&self, request: &Capabilities) -> bool {
+		let local_caps = &self.capabilities;
+		let can_serve_since = |req, local| {
+			match (req, local) {
+				(Some(request_block), Some(serve_since)) => request_block >= serve_since,
+				(Some(_), None) => false,
+				(None, _) => true,
+			}
+		};
 
-		caps.serve_headers == c.serve_headers &&
-			caps.serve_chain_since >= c.serve_chain_since &&
-			caps.serve_state_since >= c.serve_chain_since
+		local_caps.serve_headers >= request.serve_headers &&
+		    can_serve_since(request.serve_chain_since, local_caps.serve_chain_since) &&
+		    can_serve_since(request.serve_state_since, local_caps.serve_state_since)
 	}
 }
 
@@ -244,7 +252,7 @@ impl OnDemand {
 			peers: RwLock::new(HashMap::new()),
 			in_transit: RwLock::new(HashMap::new()),
 			cache: cache,
-			no_immediate_dispatch: true,
+			no_immediate_dispatch: false,
 		}
 	}
 
@@ -266,7 +274,6 @@ impl OnDemand {
 		-> Result<Receiver<Vec<Response>>, basic_request::NoSuchOutput>
 	{
 		let (sender, receiver) = oneshot::channel();
-
 		if requests.is_empty() {
 			assert!(sender.send(Vec::new()).is_ok(), "receiver still in scope; qed");
 			return Ok(receiver);
@@ -335,6 +342,7 @@ impl OnDemand {
 	// dispatch pending requests, and discard those for which the corresponding
 	// receiver has been dropped.
 	fn dispatch_pending(&self, ctx: &BasicContext) {
+
 		// wrapper future for calling `poll_cancel` on our `Senders` to preserve
 		// the invariant that it's always within a task.
 		struct CheckHangup<'a, T: 'a>(&'a mut Sender<T>);
@@ -360,6 +368,8 @@ impl OnDemand {
 		if self.pending.read().is_empty() { return }
 		let mut pending = self.pending.write();
 
+		debug!(target: "on_demand", "Attempting to dispatch {} pending requests", pending.len());
+
 		// iterate over all pending requests, and check them for hang-up.
 		// then, try and find a peer who can serve it.
 		let peers = self.peers.read();
@@ -378,16 +388,21 @@ impl OnDemand {
 
 					match ctx.request_from(*peer_id, pending.net_requests.clone()) {
 						Ok(req_id) => {
+							trace!(target: "on_demand", "Dispatched request {} to peer {}", req_id, peer_id);
 							self.in_transit.write().insert(req_id, pending);
 							return None
 						}
-						Err(net::Error::NoCredits) => {}
+						Err(net::Error::NoCredits) | Err(net::Error::NotServer) => {}
 						Err(e) => debug!(target: "on_demand", "Error dispatching request to peer: {}", e),
 					}
 				}
+
+				// TODO: maximum number of failures _when we have peers_.
 				Some(pending)
 			})
 			.collect(); // `pending` now contains all requests we couldn't dispatch.
+
+		debug!(target: "on_demand", "Was unable to dispatch {} requests.", pending.len());
 	}
 
 	// submit a pending request set. attempts to answer from cache before
@@ -395,6 +410,7 @@ impl OnDemand {
 	fn submit_pending(&self, ctx: &BasicContext, mut pending: Pending) {
 		// answer as many requests from cache as we can, and schedule for dispatch
 		// if incomplete.
+
 		pending.answer_from_cache(&*self.cache);
 		if let Some(mut pending) = pending.try_complete() {
 			pending.update_net_requests();

ethcore/src/snapshot/service.rs

@@ -46,6 +46,9 @@ struct Guard(bool, PathBuf);
 impl Guard {
 	fn new(path: PathBuf) -> Self { Guard(true, path) }
 
+	#[cfg(test)]
+	fn benign() -> Self { Guard(false, PathBuf::default()) }
+
 	fn disarm(mut self) { self.0 = false }
 }
 
@@ -123,7 +126,7 @@ impl Restoration {
 
 	// feeds a state chunk, aborts early if `flag` becomes false.
 	fn feed_state(&mut self, hash: H256, chunk: &[u8], flag: &AtomicBool) -> Result<(), Error> {
-		if self.state_chunks_left.remove(&hash) {
+		if self.state_chunks_left.contains(&hash) {
 			let len = snappy::decompress_into(chunk, &mut self.snappy_buffer)?;
 
 			self.state.feed(&self.snappy_buffer[..len], flag)?;
@@ -131,6 +134,8 @@ impl Restoration {
 			if let Some(ref mut writer) = self.writer.as_mut() {
 				writer.write_state_chunk(hash, chunk)?;
 			}
+
+			self.state_chunks_left.remove(&hash);
 		}
 
 		Ok(())
@@ -138,13 +143,15 @@ impl Restoration {
 
 	// feeds a block chunk
 	fn feed_blocks(&mut self, hash: H256, chunk: &[u8], engine: &Engine, flag: &AtomicBool) -> Result<(), Error> {
-		if self.block_chunks_left.remove(&hash) {
+		if self.block_chunks_left.contains(&hash) {
 			let len = snappy::decompress_into(chunk, &mut self.snappy_buffer)?;
 
 			self.secondary.feed(&self.snappy_buffer[..len], engine, flag)?;
 			if let Some(ref mut writer) = self.writer.as_mut() {
 				 writer.write_block_chunk(hash, chunk)?;
 			}
+
+			self.block_chunks_left.remove(&hash);
 		}
 
 		Ok(())
@@ -558,9 +565,9 @@ impl SnapshotService for Service {
 		self.reader.read().as_ref().map(|r| r.manifest().clone())
 	}
 
-	fn min_supported_version(&self) -> Option<u64> {
+	fn supported_versions(&self) -> Option<(u64, u64)> {
 		self.engine.snapshot_components()
-			.map(|c| c.min_supported_version())
+			.map(|c| (c.min_supported_version(), c.current_version()))
 	}
 
 	fn chunk(&self, hash: H256) -> Option<Bytes> {
@@ -668,4 +675,50 @@ mod tests {
 		service.restore_state_chunk(Default::default(), vec![]);
 		service.restore_block_chunk(Default::default(), vec![]);
 	}
+
+	#[test]
+	fn cannot_finish_with_invalid_chunks() {
+		use util::H256;
+		use util::kvdb::DatabaseConfig;
+
+		let spec = get_test_spec();
+		let dir = RandomTempPath::new();
+
+		let state_hashes: Vec<_> = (0..5).map(|_| H256::random()).collect();
+		let block_hashes: Vec<_> = (0..5).map(|_| H256::random()).collect();
+		let db_config = DatabaseConfig::with_columns(::db::NUM_COLUMNS);
+		let gb = spec.genesis_block();
+		let flag = ::std::sync::atomic::AtomicBool::new(true);
+
+		let params = RestorationParams {
+			manifest: ManifestData {
+				version: 2,
+				state_hashes: state_hashes.clone(),
+				block_hashes: block_hashes.clone(),
+				state_root: H256::default(),
+				block_number: 100000,
+				block_hash: H256::default(),
+			},
+			pruning: Algorithm::Archive,
+			db_path: dir.as_path().to_owned(),
+			db_config: &db_config,
+			writer: None,
+			genesis: &gb,
+			guard: Guard::benign(),
+			engine: &*spec.engine,
+		};
+
+		let mut restoration = Restoration::new(params).unwrap();
+		let definitely_bad_chunk = [1, 2, 3, 4, 5];
+
+		for hash in state_hashes {
+			assert!(restoration.feed_state(hash, &definitely_bad_chunk, &flag).is_err());
+			assert!(!restoration.is_done());
+		}
+
+		for hash in block_hashes {
+			assert!(restoration.feed_blocks(hash, &definitely_bad_chunk, &*spec.engine, &flag).is_err());
+			assert!(!restoration.is_done());
+		}
+	}
 }

ethcore/src/snapshot/snapshot_service_trait.rs

@@ -27,9 +27,9 @@ pub trait SnapshotService : Sync + Send {
 	/// Query the most recent manifest data.
 	fn manifest(&self) -> Option<ManifestData>;
 
-	/// Get the minimum supported snapshot version number.
+	/// Get the supported range of snapshot version numbers.
 	/// `None` indicates warp sync isn't supported by the consensus engine.
-	fn min_supported_version(&self) -> Option<u64>;
+	fn supported_versions(&self) -> Option<(u64, u64)>;
 
 	/// Get raw chunk for a given hash.
 	fn chunk(&self, hash: H256) -> Option<Bytes>;

ethcore/src/spec/spec.rs

@@ -100,6 +100,7 @@ impl CommonParams {
 		schedule.have_create2 = block_number >= self.eip86_transition;
 		schedule.have_revert = block_number >= self.eip140_transition;
 		schedule.have_static_call = block_number >= self.eip214_transition;
+		schedule.have_return_data = block_number >= self.eip211_transition;
 		if block_number >= self.eip210_transition {
 			schedule.blockhash_gas = 350;
 		}

js/package.json

@@ -209,7 +209,7 @@
     "react-intl": "2.1.5",
     "react-markdown": "2.4.4",
     "react-portal": "3.0.0",
-    "react-qr-reader": "1.0.3",
+    "react-qr-reader": "1.1.3",
     "react-redux": "4.4.6",
     "react-router": "3.0.0",
     "react-router-redux": "4.0.7",

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

@@ -104,7 +104,7 @@ contract WalletLibrary is WalletEvents {
 
   // constructor is given number of sigs required to do protected "onlymanyowners" transactions
   // as well as the selection of addresses capable of confirming them.
-  function initMultiowned(address[] _owners, uint _required) {
+  function initMultiowned(address[] _owners, uint _required) only_uninitialized {
     m_numOwners = _owners.length + 1;
     m_owners[1] = uint(msg.sender);
     m_ownerIndex[uint(msg.sender)] = 1;
@@ -198,7 +198,7 @@ contract WalletLibrary is WalletEvents {
   }
 
   // constructor - stores initial daily limit and records the present day's index.
-  function initDaylimit(uint _limit) {
+  function initDaylimit(uint _limit) only_uninitialized {
     m_dailyLimit = _limit;
     m_lastDay = today();
   }
@@ -211,9 +211,12 @@ contract WalletLibrary is WalletEvents {
     m_spentToday = 0;
   }
 
+  // throw unless the contract is not yet initialized.
+  modifier only_uninitialized { if (m_numOwners > 0) throw; _; }
+
   // constructor - just pass on the owner array to the multiowned and
   // the limit to daylimit
-  function initWallet(address[] _owners, uint _required, uint _daylimit) {
+  function initWallet(address[] _owners, uint _required, uint _daylimit) only_uninitialized {
     initDaylimit(_daylimit);
     initMultiowned(_owners, _required);
   }

js/src/modals/CreateAccount/store.js

@@ -120,7 +120,6 @@ export default class Store {
   }
 
   @computed get qrAddressValid () {
-    console.log('qrValid', this.qrAddress, this._api.util.isAddressValid(this.qrAddress));
     return this._api.util.isAddressValid(this.qrAddress);
   }
 
@@ -191,7 +190,7 @@ export default class Store {
     }
 
     // FIXME: Current native signer encoding is not 100% for EIP-55, lowercase for now
-    this.qrAddress = this._api.util
+    this.qrAddress = qrAddress && this._api.util
         ? this._api.util.toChecksumAddress(qrAddress.toLowerCase())
         : qrAddress;
   }

js/src/modals/CreateWallet/createWalletStore.js

@@ -191,6 +191,8 @@ export default class CreateWalletStore {
         return null; // exception when registry is not available
       })
       .then((address) => {
+        console.warn('WalletLibrary address in registry', address);
+
         if (!address || /^(0x)?0*$/.test(address)) {
           return null;
         }

js/src/redux/providers/balancesActions.js

@@ -144,34 +144,37 @@ export function updateTokensFilter (_addresses, _tokens, options = {}) {
       promises.push(api.eth.uninstallFilter(tokensFilter.filterToId));
     }
 
-    const promise = Promise.all(promises);
+    Promise
+      .all([
+        api.eth.blockNumber()
+      ].concat(promises))
+      .then(([ block ]) => {
+        const topicsFrom = [ TRANSFER_SIGNATURE, addresses, null ];
+        const topicsTo = [ TRANSFER_SIGNATURE, null, addresses ];
 
-    const topicsFrom = [ TRANSFER_SIGNATURE, addresses, null ];
-    const topicsTo = [ TRANSFER_SIGNATURE, null, addresses ];
+        const filterOptions = {
+          fromBlock: block,
+          toBlock: 'pending',
+          address: tokenAddresses
+        };
 
-    const filterOptions = {
-      fromBlock: 0,
-      toBlock: 'pending',
-      address: tokenAddresses
-    };
+        const optionsFrom = {
+          ...filterOptions,
+          topics: topicsFrom
+        };
 
-    const optionsFrom = {
-      ...filterOptions,
-      topics: topicsFrom
-    };
+        const optionsTo = {
+          ...filterOptions,
+          topics: topicsTo
+        };
 
-    const optionsTo = {
-      ...filterOptions,
-      topics: topicsTo
-    };
+        const newFilters = Promise.all([
+          api.eth.newFilter(optionsFrom),
+          api.eth.newFilter(optionsTo)
+        ]);
 
-    const newFilters = Promise.all([
-      api.eth.newFilter(optionsFrom),
-      api.eth.newFilter(optionsTo)
-    ]);
-
-    promise
-      .then(() => newFilters)
+        return newFilters;
+      })
       .then(([ filterFromId, filterToId ]) => {
         const nextTokensFilter = {
           filterFromId, filterToId,

js/src/redux/providers/status.js

@@ -228,9 +228,10 @@ export default class Status {
 
   _overallStatus = (health) => {
     const all = [health.peers, health.sync, health.time].filter(x => x);
+    const allNoTime = [health.peers, health.sync].filter(x => x);
     const statuses = all.map(x => x.status);
     const bad = statuses.find(x => x === STATUS_BAD);
-    const needsAttention = statuses.find(x => x === STATUS_WARN);
+    const needsAttention = allNoTime.map(x => x.status).find(x => x === STATUS_WARN);
     const message = all.map(x => x.message).filter(x => x);
 
     if (all.length) {

js/src/redux/providers/statusReducer.js

@@ -35,7 +35,7 @@ const initialState = {
       status: DEFAULT_STATUS
     },
     overall: {
-      isReady: false,
+      isNotReady: true,
       status: DEFAULT_STATUS,
       message: []
     }

js/src/secureApi.js

@@ -101,13 +101,7 @@ export default class SecureApi extends Api {
       return 'dapps.parity';
     }
 
-    const { host } = this._dappsAddress;
-
-    if (!host || host === '0.0.0.0') {
-      return window.location.hostname;
-    }
-
-    return host;
+    return this._dappsAddress.host;
   }
 
   get isConnecting () {
@@ -173,6 +167,25 @@ export default class SecureApi extends Api {
       });
   }
 
+  /**
+   * Resolves a wildcard address to `window.location.hostname`;
+   */
+  _resolveHost (url) {
+    const parts = url ? url.split(':') : [];
+    const port = parts[1];
+    let host = parts[0];
+
+    if (!host) {
+      return host;
+    }
+
+    if (host === '0.0.0.0') {
+      host = window.location.hostname;
+    }
+
+    return port ? `${host}:${port}` : host;
+  }
+
   /**
    * Returns a Promise that gets resolved with
    * a boolean: `true` if the node is up, `false`
@@ -316,8 +329,8 @@ export default class SecureApi extends Api {
         this._uiApi.parity.wsUrl()
       ])
       .then(([dappsUrl, wsUrl]) => {
-        this._dappsUrl = dappsUrl;
-        this._wsUrl = wsUrl;
+        this._dappsUrl = this._resolveHost(dappsUrl);
+        this._wsUrl = this._resolveHost(wsUrl);
       });
   }
 

js/src/ui/ConfirmDialog/confirmDialog.js

@@ -69,14 +69,14 @@ export default class ConfirmDialog extends Component {
       <Portal
         buttons={ [
           <Button
-            disabled={ disabledDeny }
+            disabled={ disabledDeny || busy }
             icon={ iconDeny || <CancelIcon /> }
             key='deny'
             label={ labelDeny || DEFAULT_NO }
             onClick={ onDeny }
           />,
           <Button
-            disabled={ disabledConfirm }
+            disabled={ disabledConfirm || busy }
             icon={ iconConfirm || <CheckIcon /> }
             key='confirm'
             label={ labelConfirm || DEFAULT_YES }

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

@@ -41,8 +41,13 @@ class Delete extends Component {
     newError: PropTypes.func
   };
 
+  state = {
+    isBusy: false
+  };
+
   render () {
     const { account, confirmMessage, visible } = this.props;
+    const { isBusy } = this.state;
 
     if (!visible) {
       return null;
@@ -50,6 +55,7 @@ class Delete extends Component {
 
     return (
       <ConfirmDialog
+        busy={ isBusy }
         className={ styles.delete }
         title={
           <FormattedMessage
@@ -99,6 +105,8 @@ class Delete extends Component {
     const { api, router } = this.context;
     const { account, route, newError } = this.props;
 
+    this.setState({ isBusy: true });
+
     api.parity
       .removeAddress(account.address)
       .then(() => {

js/src/views/Signer/components/TransactionPendingForm/TransactionPendingFormConfirm/transactionPendingFormConfirm.js

@@ -407,7 +407,11 @@ export default class TransactionPendingFormConfirm extends Component {
   onScan = (signature) => {
     const { chainId, rlp, tx, data, decrypt } = this.state.qr;
 
-    if (signature && signature.substr(0, 2) !== '0x') {
+    if (!signature) {
+      return;
+    }
+
+    if (signature.substr(0, 2) !== '0x') {
       signature = `0x${signature}`;
     }
 

js/src/views/SyncWarning/syncWarning.js

@@ -116,7 +116,7 @@ class SyncWarning extends Component {
 
 function mapStateToProps (state) {
   const { health } = state.nodeStatus;
-  const isNotAvailableYet = health.overall.isReady;
+  const isNotAvailableYet = health.overall.isNotReady;
   const isOk = isNotAvailableYet || health.overall.status === 'ok';
 
   return {

parity/blockchain.rs

@@ -93,6 +93,7 @@ pub struct ImportBlockchain {
 	pub check_seal: bool,
 	pub with_color: bool,
 	pub verifier_settings: VerifierSettings,
+	pub light: bool,
 }
 
 #[derive(Debug, PartialEq)]
@@ -138,12 +139,165 @@ pub struct ExportState {
 pub fn execute(cmd: BlockchainCmd) -> Result<(), String> {
 	match cmd {
 		BlockchainCmd::Kill(kill_cmd) => kill_db(kill_cmd),
-		BlockchainCmd::Import(import_cmd) => execute_import(import_cmd),
+		BlockchainCmd::Import(import_cmd) => {
+			if import_cmd.light {
+				execute_import_light(import_cmd)
+			} else {
+				execute_import(import_cmd)
+			}
+		}
 		BlockchainCmd::Export(export_cmd) => execute_export(export_cmd),
 		BlockchainCmd::ExportState(export_cmd) => execute_export_state(export_cmd),
 	}
 }
 
+fn execute_import_light(cmd: ImportBlockchain) -> Result<(), String> {
+	use light::client::{Service as LightClientService, Config as LightClientConfig};
+	use light::cache::Cache as LightDataCache;
+
+	let timer = Instant::now();
+
+	// load spec file
+	let spec = cmd.spec.spec(&cmd.dirs.cache)?;
+
+	// load genesis hash
+	let genesis_hash = spec.genesis_header().hash();
+
+	// database paths
+	let db_dirs = cmd.dirs.database(genesis_hash, None, spec.data_dir.clone());
+
+	// user defaults path
+	let user_defaults_path = db_dirs.user_defaults_path();
+
+	// load user defaults
+	let user_defaults = UserDefaults::load(&user_defaults_path)?;
+
+	fdlimit::raise_fd_limit();
+
+	// select pruning algorithm
+	let algorithm = cmd.pruning.to_algorithm(&user_defaults);
+
+	// prepare client and snapshot paths.
+	let client_path = db_dirs.client_path(algorithm);
+
+	// execute upgrades
+	let compaction = cmd.compaction.compaction_profile(db_dirs.db_root_path().as_path());
+	execute_upgrades(&cmd.dirs.base, &db_dirs, algorithm, compaction)?;
+
+	// create dirs used by parity
+	cmd.dirs.create_dirs(false, false, false)?;
+
+	let cache = Arc::new(::util::Mutex::new(
+		LightDataCache::new(Default::default(), ::time::Duration::seconds(0))
+	));
+
+	let mut config = LightClientConfig {
+		queue: Default::default(),
+		chain_column: ::ethcore::db::COL_LIGHT_CHAIN,
+		db_cache_size: Some(cmd.cache_config.blockchain() as usize * 1024 * 1024),
+		db_compaction: compaction,
+		db_wal: cmd.wal,
+		verify_full: true,
+		check_seal: cmd.check_seal,
+	};
+
+	config.queue.max_mem_use = cmd.cache_config.queue() as usize * 1024 * 1024;
+	config.queue.verifier_settings = cmd.verifier_settings;
+
+	let service = LightClientService::start(config, &spec, &client_path, cache)
+		.map_err(|e| format!("Failed to start client: {}", e))?;
+
+	// free up the spec in memory.
+	drop(spec);
+
+	let client = service.client();
+
+	let mut instream: Box<io::Read> = match cmd.file_path {
+		Some(f) => Box::new(fs::File::open(&f).map_err(|_| format!("Cannot open given file: {}", f))?),
+		None => Box::new(io::stdin()),
+	};
+
+	const READAHEAD_BYTES: usize = 8;
+
+	let mut first_bytes: Vec<u8> = vec![0; READAHEAD_BYTES];
+	let mut first_read = 0;
+
+	let format = match cmd.format {
+		Some(format) => format,
+		None => {
+			first_read = instream.read(&mut first_bytes).map_err(|_| "Error reading from the file/stream.")?;
+			match first_bytes[0] {
+				0xf9 => DataFormat::Binary,
+				_ => DataFormat::Hex,
+			}
+		}
+	};
+
+	let do_import = |bytes: Vec<u8>| {
+		while client.queue_info().is_full() { sleep(Duration::from_secs(1)); }
+
+		let header: ::ethcore::header::Header = ::rlp::UntrustedRlp::new(&bytes).val_at(0)
+			.map_err(|e| format!("Bad block: {}", e))?;
+
+		if client.best_block_header().number() >= header.number() { return Ok(()) }
+
+		if header.number() % 10000 == 0 {
+			info!("#{}", header.number());
+		}
+
+		match client.import_header(header) {
+			Err(BlockImportError::Import(ImportError::AlreadyInChain)) => {
+				trace!("Skipping block already in chain.");
+			}
+			Err(e) => {
+				return Err(format!("Cannot import block: {:?}", e));
+			},
+			Ok(_) => {},
+		}
+		Ok(())
+	};
+
+	match format {
+		DataFormat::Binary => {
+			loop {
+				let mut bytes = if first_read > 0 {first_bytes.clone()} else {vec![0; READAHEAD_BYTES]};
+				let n = if first_read > 0 {
+					first_read
+				} else {
+					instream.read(&mut bytes).map_err(|_| "Error reading from the file/stream.")?
+				};
+				if n == 0 { break; }
+				first_read = 0;
+				let s = PayloadInfo::from(&bytes).map_err(|e| format!("Invalid RLP in the file/stream: {:?}", e))?.total();
+				bytes.resize(s, 0);
+				instream.read_exact(&mut bytes[n..]).map_err(|_| "Error reading from the file/stream.")?;
+				do_import(bytes)?;
+			}
+		}
+		DataFormat::Hex => {
+			for line in BufReader::new(instream).lines() {
+				let s = line.map_err(|_| "Error reading from the file/stream.")?;
+				let s = if first_read > 0 {from_utf8(&first_bytes).unwrap().to_owned() + &(s[..])} else {s};
+				first_read = 0;
+				let bytes = s.from_hex().map_err(|_| "Invalid hex in file/stream.")?;
+				do_import(bytes)?;
+			}
+		}
+	}
+	client.flush_queue();
+
+	let ms = timer.elapsed().as_milliseconds();
+	let report = client.report();
+
+	info!("Import completed in {} seconds, {} headers, {} hdr/s",
+		ms / 1000,
+		report.blocks_imported,
+		(report.blocks_imported * 1000) as u64 / ms,
+	);
+
+	Ok(())
+}
+
 fn execute_import(cmd: ImportBlockchain) -> Result<(), String> {
 	let timer = Instant::now();
 

parity/cli/mod.rs

@@ -356,7 +356,7 @@ usage! {
 			or |c: &Config| otry!(c.vm).jit.clone(),
 
 		// -- Miscellaneous Options
-		flag_ntp_server: String = "pool.ntp.org:123",
+		flag_ntp_server: String = "none",
 			or |c: &Config| otry!(c.misc).ntp_server.clone(),
 		flag_logging: Option<String> = None,
 			or |c: &Config| otry!(c.misc).logging.clone().map(Some),
@@ -897,7 +897,7 @@ mod tests {
 			flag_dapps_apis_all: None,
 
 			// -- Miscellaneous Options
-			flag_ntp_server: "pool.ntp.org:123".into(),
+			flag_ntp_server: "none".into(),
 			flag_version: false,
 			flag_logging: Some("own_tx=trace".into()),
 			flag_log_file: Some("/var/log/parity.log".into()),

parity/configuration.rs

@@ -243,6 +243,7 @@ impl Configuration {
 				check_seal: !self.args.flag_no_seal_check,
 				with_color: logger_config.color,
 				verifier_settings: self.verifier_settings(),
+				light: self.args.flag_light,
 			};
 			Cmd::Blockchain(BlockchainCmd::Import(import_cmd))
 		} else if self.args.cmd_export {
@@ -1179,6 +1180,7 @@ mod tests {
 			check_seal: true,
 			with_color: !cfg!(windows),
 			verifier_settings: Default::default(),
+			light: false,
 		})));
 	}
 
@@ -1270,7 +1272,7 @@ mod tests {
 			support_token_api: true
 		}, UiConfiguration {
 			enabled: true,
-			ntp_server: "pool.ntp.org:123".into(),
+			ntp_server: "none".into(),
 			interface: "127.0.0.1".into(),
 			port: 8180,
 			hosts: Some(vec![]),
@@ -1511,7 +1513,7 @@ mod tests {
 		assert_eq!(conf0.directories().signer, "signer".to_owned());
 		assert_eq!(conf0.ui_config(), UiConfiguration {
 			enabled: true,
-			ntp_server: "pool.ntp.org:123".into(),
+			ntp_server: "none".into(),
 			interface: "127.0.0.1".into(),
 			port: 8180,
 			hosts: Some(vec![]),
@@ -1520,7 +1522,7 @@ mod tests {
 		assert_eq!(conf1.directories().signer, "signer".to_owned());
 		assert_eq!(conf1.ui_config(), UiConfiguration {
 			enabled: true,
-			ntp_server: "pool.ntp.org:123".into(),
+			ntp_server: "none".into(),
 			interface: "127.0.0.1".into(),
 			port: 8180,
 			hosts: Some(vec![]),
@@ -1530,7 +1532,7 @@ mod tests {
 		assert_eq!(conf2.directories().signer, "signer".to_owned());
 		assert_eq!(conf2.ui_config(), UiConfiguration {
 			enabled: true,
-			ntp_server: "pool.ntp.org:123".into(),
+			ntp_server: "none".into(),
 			interface: "127.0.0.1".into(),
 			port: 3123,
 			hosts: Some(vec![]),
@@ -1539,7 +1541,7 @@ mod tests {
 		assert_eq!(conf3.directories().signer, "signer".to_owned());
 		assert_eq!(conf3.ui_config(), UiConfiguration {
 			enabled: true,
-			ntp_server: "pool.ntp.org:123".into(),
+			ntp_server: "none".into(),
 			interface: "test".into(),
 			port: 8180,
 			hosts: Some(vec![]),

parity/dapps.rs

@@ -47,7 +47,7 @@ impl Default for Configuration {
 		let data_dir = default_data_path();
 		Configuration {
 			enabled: true,
-			ntp_server: "pool.ntp.org:123".into(),
+			ntp_server: "none".into(),
 			dapps_path: replace_home(&data_dir, "$BASE/dapps").into(),
 			extra_dapps: vec![],
 			extra_embed_on: vec![],
@@ -114,7 +114,7 @@ impl ContractClient for LightRegistrar {
 					tx: Transaction {
 						nonce: self.client.engine().account_start_nonce(header.number()),
 						action: Action::Call(address),
-						gas: 50_000_000.into(),
+						gas: 50_000.into(), // should be enough for all registry lookups. TODO: exponential backoff
 						gas_price: 0.into(),
 						value: 0.into(),
 						data: data,

parity/informant.rs

@@ -152,7 +152,7 @@ impl InformantData for FullNodeInformantData {
 					max_peers: status.current_max_peers(net_config.min_peers, net_config.max_peers),
 				}))
 			}
-			_ => (is_major_importing(None, queue_info.clone()), None),
+			_ => (is_major_importing(self.sync.as_ref().map(|s| s.status().state), queue_info.clone()), None),
 		};
 
 		Report {
@@ -254,21 +254,22 @@ impl<T: InformantData> Informant<T> {
 			return;
 		}
 
+		let (client_report, full_report) = {
+			let mut last_report = self.last_report.lock();
+			let full_report = self.target.report();
+			let diffed = full_report.client_report.clone() - &*last_report;
+			*last_report = full_report.client_report.clone();
+			(diffed, full_report)
+		};
+
 		let Report {
 			importing,
 			chain_info,
-			client_report,
 			queue_info,
 			cache_sizes,
 			sync_info,
-		} = self.target.report();
-
-		let client_report = {
-			let mut last_report = self.last_report.lock();
-			let diffed = client_report.clone() - &*last_report;
-			*last_report = client_report.clone();
-			diffed
-		};
+			..
+		} = full_report;
 
 		let rpc_stats = self.rpc_stats.as_ref();
 

parity/rpc.rs

@@ -108,7 +108,7 @@ impl Default for UiConfiguration {
 	fn default() -> Self {
 		UiConfiguration {
 			enabled: true && cfg!(feature = "ui-enabled"),
-			ntp_server: "pool.ntp.org:123".into(),
+			ntp_server: "none".into(),
 			port: 8180,
 			interface: "127.0.0.1".into(),
 			hosts: Some(vec![]),

parity/run.rs

@@ -210,6 +210,7 @@ fn execute_light(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) ->
 		db_compaction: compaction,
 		db_wal: cmd.wal,
 		verify_full: true,
+		check_seal: cmd.check_seal,
 	};
 
 	config.queue.max_mem_use = cmd.cache_config.queue() as usize * 1024 * 1024;

rpc/src/v1/helpers/block_import.rs

@@ -21,9 +21,10 @@ use ethsync::SyncState;
 
 /// Check if client is during major sync or during block import.
 pub fn is_major_importing(sync_state: Option<SyncState>, queue_info: BlockQueueInfo) -> bool {
-	let is_syncing_state = sync_state.map_or(false, |s|
-		s != SyncState::Idle && s != SyncState::NewBlocks
-	);
+	let is_syncing_state = sync_state.map_or(false, |s| match s {
+		SyncState::Idle | SyncState::NewBlocks | SyncState::WaitingPeers => false,
+		_ => true,
+	});
 	let is_verifying = queue_info.unverified_queue_size + queue_info.verified_queue_size > 3;
 	is_verifying || is_syncing_state
 }

rpc/src/v1/helpers/dispatch.rs

@@ -177,7 +177,7 @@ pub fn fetch_gas_price_corpus(
 ) -> BoxFuture<Corpus<U256>, Error> {
 	const GAS_PRICE_SAMPLE_SIZE: usize = 100;
 
-	if let Some(cached) = cache.lock().gas_price_corpus() {
+	if let Some(cached) = { cache.lock().gas_price_corpus() } {
 		return future::ok(cached).boxed()
 	}
 

rpc/src/v1/helpers/light_fetch.rs

@@ -26,6 +26,7 @@ use ethcore::filter::Filter as EthcoreFilter;
 use ethcore::transaction::{Action, Transaction as EthTransaction};
 
 use futures::{future, Future, BoxFuture};
+use futures::future::Either;
 use jsonrpc_core::Error;
 use jsonrpc_macros::Trailing;
 
@@ -159,7 +160,9 @@ impl LightFetch {
 
 	/// helper for getting proved execution.
 	pub fn proved_execution(&self, req: CallRequest, num: Trailing<BlockNumber>) -> BoxFuture<ExecutionResult, Error> {
-		const DEFAULT_GAS_PRICE: U256 = U256([0, 0, 0, 21_000_000]);
+		const DEFAULT_GAS_PRICE: u64 = 21_000;
+		// starting gas when gas not provided.
+		const START_GAS: u64 = 50_000;
 
 		let (sync, on_demand, client) = (self.sync.clone(), self.on_demand.clone(), self.client.clone());
 		let req: CallRequestHelper = req.into();
@@ -167,21 +170,21 @@ impl LightFetch {
 
 		let from = req.from.unwrap_or(Address::zero());
 		let nonce_fut = match req.nonce {
-			Some(nonce) => future::ok(Some(nonce)).boxed(),
-			None => self.account(from, id).map(|acc| acc.map(|a| a.nonce)).boxed(),
+			Some(nonce) => Either::A(future::ok(Some(nonce))),
+			None => Either::B(self.account(from, id).map(|acc| acc.map(|a| a.nonce))),
 		};
 
 		let gas_price_fut = match req.gas_price {
-			Some(price) => future::ok(price).boxed(),
-			None => dispatch::fetch_gas_price_corpus(
+			Some(price) => Either::A(future::ok(price)),
+			None => Either::B(dispatch::fetch_gas_price_corpus(
 				self.sync.clone(),
 				self.client.clone(),
 				self.on_demand.clone(),
 				self.cache.clone(),
 			).map(|corp| match corp.median() {
 				Some(median) => *median,
-				None => DEFAULT_GAS_PRICE,
-			}).boxed()
+				None => DEFAULT_GAS_PRICE.into(),
+			}))
 		};
 
 		// if nonce resolves, this should too since it'll be in the LRU-cache.
@@ -190,22 +193,29 @@ impl LightFetch {
 		// fetch missing transaction fields from the network.
 		nonce_fut.join(gas_price_fut).and_then(move |(nonce, gas_price)| {
 			let action = req.to.map_or(Action::Create, Action::Call);
-			let gas = req.gas.unwrap_or(U256::from(10_000_000)); // better gas amount?
 			let value = req.value.unwrap_or_else(U256::zero);
 			let data = req.data.unwrap_or_default();
 
-			future::done(match nonce {
-				Some(n) => Ok(EthTransaction {
+			future::done(match (nonce, req.gas) {
+				(Some(n), Some(gas)) => Ok((true, EthTransaction {
 					nonce: n,
 					action: action,
 					gas: gas,
 					gas_price: gas_price,
 					value: value,
 					data: data,
-				}.fake_sign(from)),
-				None => Err(errors::unknown_block()),
+				})),
+				(Some(n), None) => Ok((false, EthTransaction {
+					nonce: n,
+					action: action,
+					gas: START_GAS.into(),
+					gas_price: gas_price,
+					value: value,
+					data: data,
+				})),
+				(None, _) => Err(errors::unknown_block()),
 			})
-		}).join(header_fut).and_then(move |(tx, hdr)| {
+		}).join(header_fut).and_then(move |((gas_known, tx), hdr)| {
 			// then request proved execution.
 			// TODO: get last-hashes from network.
 			let env_info = match client.env_info(id) {
@@ -213,24 +223,15 @@ impl LightFetch {
 				_ => return future::err(errors::unknown_block()).boxed(),
 			};
 
-			let request = request::TransactionProof {
+			execute_tx(gas_known, ExecuteParams {
+				from: from,
 				tx: tx,
-				header: hdr.into(),
+				hdr: hdr,
 				env_info: env_info,
 				engine: client.engine().clone(),
-			};
-
-			let proved_future = sync.with_context(move |ctx| {
-				on_demand
-					.request(ctx, request)
-					.expect("no back-references; therefore all back-refs valid; qed")
-					.map_err(errors::on_demand_cancel).boxed()
-			});
-
-			match proved_future {
-				Some(fut) => fut.boxed(),
-				None => future::err(errors::network_disabled()).boxed(),
-			}
+				on_demand: on_demand,
+				sync: sync,
+			})
 		}).boxed()
 	}
 
@@ -320,3 +321,66 @@ impl LightFetch {
 		}
 	}
 }
+
+#[derive(Clone)]
+struct ExecuteParams {
+	from: Address,
+	tx: EthTransaction,
+	hdr: encoded::Header,
+	env_info: ::evm::env_info::EnvInfo,
+	engine: Arc<::ethcore::engines::Engine>,
+	on_demand: Arc<OnDemand>,
+	sync: Arc<LightSync>,
+}
+
+// has a peer execute the transaction with given params. If `gas_known` is false,
+// this will double the gas on each `OutOfGas` error.
+fn execute_tx(gas_known: bool, params: ExecuteParams) -> BoxFuture<ExecutionResult, Error> {
+	if !gas_known {
+		future::loop_fn(params, |mut params| {
+			execute_tx(true, params.clone()).and_then(move |res| {
+				match res {
+					Ok(executed) => {
+						// TODO: how to distinguish between actual OOG and
+						// exception?
+						if executed.exception.is_some() {
+							let old_gas = params.tx.gas;
+							params.tx.gas = params.tx.gas * 2.into();
+							if params.tx.gas > params.hdr.gas_limit() {
+								params.tx.gas = old_gas;
+							} else {
+								return Ok(future::Loop::Continue(params))
+							}
+						}
+
+						Ok(future::Loop::Break(Ok(executed)))
+					}
+					failed => Ok(future::Loop::Break(failed)),
+				}
+			})
+		}).boxed()
+	} else {
+		trace!(target: "light_fetch", "Placing execution request for {} gas in on_demand",
+			params.tx.gas);
+
+		let request = request::TransactionProof {
+			tx: params.tx.fake_sign(params.from),
+			header: params.hdr.into(),
+			env_info: params.env_info,
+			engine: params.engine,
+		};
+
+		let on_demand = params.on_demand;
+		let proved_future = params.sync.with_context(move |ctx| {
+			on_demand
+				.request(ctx, request)
+				.expect("no back-references; therefore all back-refs valid; qed")
+				.map_err(errors::on_demand_cancel)
+		});
+
+		match proved_future {
+			Some(fut) => fut.boxed(),
+			None => future::err(errors::network_disabled()).boxed(),
+		}
+	}
+}

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

@@ -41,7 +41,7 @@ impl TestSnapshotService {
 
 impl SnapshotService for TestSnapshotService {
 	fn manifest(&self) -> Option<ManifestData> { None }
-	fn min_supported_version(&self) -> Option<u64> { None }
+	fn supported_versions(&self) -> Option<(u64, u64)> { None }
 	fn chunk(&self, _hash: H256) -> Option<Bytes> { None }
 	fn status(&self) -> RestorationStatus { self.status.lock().clone() }
 	fn begin_restore(&self, _manifest: ManifestData) { }

scripts/docker-build.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 cd docker/hub
-if [ "$1" == "latest" ]; then DOCKER_BUILD_TAG="beta-release"; fi
-docker build --build-arg BUILD_TAG=$DOCKER_BUILD_TAG --no-cache=true --tag $2/parity:$1 .
-docker push $2/parity:$1
+DOCKER_BUILD_TAG=$1
+echo "Docker build tag: " $DOCKER_BUILD_TAG
+docker build --build-arg BUILD_TAG=$DOCKER_BUILD_TAG --no-cache=true --tag parity/parity:$DOCKER_BUILD_TAG .
+docker run -it parity/parity:$DOCKER_BUILD_TAG -v
+docker push parity/parity:$DOCKER_BUILD_TAG

snap/snapcraft.yaml

@@ -17,6 +17,6 @@ apps:
 
 parts:
   parity:
-    source: .
+    source: ..
     plugin: rust
     build-packages: [g++, libudev-dev, libssl-dev, make, pkg-config]

sync/src/chain.rs

@@ -504,7 +504,7 @@ impl ChainSync {
 	}
 
 	fn maybe_start_snapshot_sync(&mut self, io: &mut SyncIo) {
-		if !self.enable_warp_sync || io.snapshot_service().min_supported_version().is_none() {
+		if !self.enable_warp_sync || io.snapshot_service().supported_versions().is_none() {
 			return;
 		}
 		if self.state != SyncState::WaitingPeers && self.state != SyncState::Blocks && self.state != SyncState::Waiting {
@@ -1044,11 +1044,11 @@ impl ChainSync {
 			Ok(manifest) => manifest,
 		};
 
-		let is_supported_version = io.snapshot_service().min_supported_version()
-			.map_or(false, |v| manifest.version >= v);
+		let is_supported_version = io.snapshot_service().supported_versions()
+			.map_or(false, |(l, h)| manifest.version >= l && manifest.version <= h);
 
 		if !is_supported_version {
-			trace!(target: "sync", "{}: Snapshot manifest version too low: {}", peer_id, manifest.version);
+			trace!(target: "sync", "{}: Snapshot manifest version not supported: {}", peer_id, manifest.version);
 			io.disable_peer(peer_id);
 			self.continue_sync(io);
 			return Ok(());

sync/src/light_sync/mod.rs

@@ -285,6 +285,13 @@ impl<L: AsLightClient + Send + Sync> Handler for LightSync<L> {
 			best.clone()
 		};
 
+		{
+			let mut pending_reqs = self.pending_reqs.lock();
+			for unfulfilled in unfulfilled {
+				pending_reqs.remove(&unfulfilled);
+			}
+		}
+
 		if new_best.is_none() {
 			debug!(target: "sync", "No peers remain. Reverting to idle");
 			*self.state.lock() = SyncState::Idle;
@@ -503,10 +510,12 @@ impl<L: AsLightClient> LightSync<L> {
 					None
 				}
 			}).collect();
+
 			let mut rng = self.rng.lock();
+			let mut requested_from = HashSet::new();
 
 			// naive request dispatcher: just give to any peer which says it will
-			// give us responses.
+			// give us responses. but only one request per peer per state transition.
 			let dispatcher = move |req: HeadersRequest| {
 				rng.shuffle(&mut peer_ids);
 
@@ -521,9 +530,12 @@ impl<L: AsLightClient> LightSync<L> {
 					builder.build()
 				};
 				for peer in &peer_ids {
+					if requested_from.contains(peer) { continue }
 					match ctx.request_from(*peer, request.clone()) {
 						Ok(id) => {
 							self.pending_reqs.lock().insert(id.clone());
+							requested_from.insert(peer.clone());
+
 							return Some(id)
 						}
 						Err(NetError::NoCredits) => {}

sync/src/tests/snapshot.rs

@@ -71,8 +71,8 @@ impl SnapshotService for TestSnapshotService {
 		self.manifest.as_ref().cloned()
 	}
 
-	fn min_supported_version(&self) -> Option<u64> {
-		Some(1)
+	fn supported_versions(&self) -> Option<(u64, u64)> {
+		Some((1, 2))
 	}
 
 	fn chunk(&self, hash: H256) -> Option<Bytes> {

util/network/src/host.rs

@@ -857,11 +857,16 @@ impl Host {
 							// Add it to the node table
 							if !s.info.originated {
 								if let Ok(address) = s.remote_addr() {
-									let entry = NodeEntry { id: id, endpoint: NodeEndpoint { address: address, udp_port: address.port() } };
-									self.nodes.write().add_node(Node::new(entry.id.clone(), entry.endpoint.clone()));
-									let mut discovery = self.discovery.lock();
-									if let Some(ref mut discovery) = *discovery {
-										discovery.add_node(entry);
+									// We can't know remote listening ports, so just assume defaults and hope for the best.
+									let endpoint = NodeEndpoint { address: SocketAddr::new(address.ip(), DEFAULT_PORT), udp_port: DEFAULT_PORT };
+									let entry = NodeEntry { id: id, endpoint: endpoint };
+									let mut nodes = self.nodes.write();
+									if !nodes.contains(&entry.id) {
+										nodes.add_node(Node::new(entry.id.clone(), entry.endpoint.clone()));
+										let mut discovery = self.discovery.lock();
+										if let Some(ref mut discovery) = *discovery {
+											discovery.add_node(entry);
+										}
 									}
 								}
 							}

util/network/src/node_table.rs

@@ -236,6 +236,11 @@ impl NodeTable {
 		self.nodes.get_mut(id)
 	}
 
+	/// Check if a node exists in the table.
+	pub fn contains(&self, id: &NodeId) -> bool {
+		self.nodes.contains_key(id)
+	}
+
 	/// Apply table changes coming from discovery
 	pub fn update(&mut self, mut update: TableUpdates, reserved: &HashSet<NodeId>) {
 		for (_, node) in update.added.drain() {

util/src/cache.rs

@@ -32,6 +32,11 @@ pub struct MemoryLruCache<K: Eq + Hash, V: HeapSizeOf> {
 	max_size: usize,
 }
 
+// amount of memory used when the item will be put on the heap.
+fn heap_size_of<T: HeapSizeOf>(val: &T) -> usize {
+	::std::mem::size_of::<T>() + val.heap_size_of_children()
+}
+
 impl<K: Eq + Hash, V: HeapSizeOf> MemoryLruCache<K, V> {
 	/// Create a new cache with a maximum size in bytes.
 	pub fn new(max_size: usize) -> Self {
@@ -52,15 +57,17 @@ impl<K: Eq + Hash, V: HeapSizeOf> MemoryLruCache<K, V> {
 			self.inner.set_capacity(cap * 2);
 		}
 
+		self.cur_size += heap_size_of(&val);
+
 		// account for any element displaced from the cache.
 		if let Some(lru) = self.inner.insert(key, val) {
-			self.cur_size -= lru.heap_size_of_children();
+			self.cur_size -= heap_size_of(&lru);
 		}
 
 		// remove elements until we are below the memory target.
 		while self.cur_size > self.max_size {
 			match self.inner.remove_lru() {
-				Some((_, v)) => self.cur_size -= v.heap_size_of_children(),
+				Some((_, v)) => self.cur_size -= heap_size_of(&v),
 				_ => break,
 			}
 		}
@@ -77,3 +84,27 @@ impl<K: Eq + Hash, V: HeapSizeOf> MemoryLruCache<K, V> {
 		self.cur_size
 	}
 }
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+
+	#[test]
+	fn it_works() {
+		let mut cache = MemoryLruCache::new(256);
+		let val1 = vec![0u8; 100];
+		let size1 = heap_size_of(&val1);
+		cache.insert("hello", val1);
+
+		assert_eq!(cache.current_size(), size1);
+
+		let val2 = vec![0u8; 210];
+		let size2 = heap_size_of(&val2);
+		cache.insert("world", val2);
+
+		assert!(cache.get_mut(&"hello").is_none());
+		assert!(cache.get_mut(&"world").is_some());
+
+		assert_eq!(cache.current_size(), size2);
+	}
+}

util/src/misc.rs

@@ -24,7 +24,7 @@ include!(concat!(env!("OUT_DIR"), "/version.rs"));
 include!(concat!(env!("OUT_DIR"), "/rustc_version.rs"));
 
 #[cfg(feature = "final")]
-const THIS_TRACK: &'static str = "nightly";
+const THIS_TRACK: &'static str = "beta";
 // ^^^ should be reset to "stable" or "beta" according to the release branch.
 
 #[cfg(not(feature = "final"))]