Merge branch 'master' into auth-round

.gitlab-ci.yml

@@ -23,12 +23,12 @@ linux-stable:
   script:
     - cargo build --release $CARGOFLAGS
     - strip target/release/parity
-    - md5sum target/release/parity >> parity.md5
+    - md5sum target/release/parity > parity.md5
     - sh scripts/deb-build.sh amd64
     - cp target/release/parity deb/usr/bin/parity
     - export VER=$(grep -m 1 version Cargo.toml | awk '{print $3}' | tr -d '"' | tr -d "\n")
     - dpkg-deb -b deb "parity_"$VER"_amd64.deb"
-    - md5sum "parity_"$VER"_amd64.deb" >> "parity_"$VER"_amd64.deb.md5"
+    - md5sum "parity_"$VER"_amd64.deb" > "parity_"$VER"_amd64.deb.md5"
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
     - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/parity --body target/release/parity
@@ -93,7 +93,7 @@ linux-centos:
     - export CC="gcc"
     - cargo build --release $CARGOFLAGS
     - strip target/release/parity
-    - md5sum target/release/parity >> parity.md5
+    - md5sum target/release/parity > parity.md5
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
     - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-centos-gnu/parity --body target/release/parity
@@ -118,12 +118,12 @@ linux-i686:
     - export HOST_CXX=g++
     - cargo build --target i686-unknown-linux-gnu --release $CARGOFLAGS
     - strip target/i686-unknown-linux-gnu/release/parity
-    - md5sum target/i686-unknown-linux-gnu/release/parity >> parity.md5
+    - md5sum target/i686-unknown-linux-gnu/release/parity > parity.md5
     - sh scripts/deb-build.sh i386
     - cp target/i686-unknown-linux-gnu/release/parity deb/usr/bin/parity
     - export VER=$(grep -m 1 version Cargo.toml | awk '{print $3}' | tr -d '"' | tr -d "\n")
     - dpkg-deb -b deb "parity_"$VER"_i386.deb"
-    - md5sum "parity_"$VER"_i386.deb" >> "parity_"$VER"_i386.deb.md5"
+    - md5sum "parity_"$VER"_i386.deb" > "parity_"$VER"_i386.deb.md5"
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
     - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/i686-unknown-linux-gnu/parity --body target/i686-unknown-linux-gnu/release/parity
@@ -158,12 +158,12 @@ linux-armv7:
     - cat .cargo/config
     - cargo build --target armv7-unknown-linux-gnueabihf --release $CARGOFLAGS
     - arm-linux-gnueabihf-strip target/armv7-unknown-linux-gnueabihf/release/parity
-    - md5sum target/armv7-unknown-linux-gnueabihf/release/parity >> parity.md5
+    - md5sum target/armv7-unknown-linux-gnueabihf/release/parity > parity.md5
     - sh scripts/deb-build.sh armhf
     - cp target/armv7-unknown-linux-gnueabihf/release/parity deb/usr/bin/parity
     - export VER=$(grep -m 1 version Cargo.toml | awk '{print $3}' | tr -d '"' | tr -d "\n")
     - dpkg-deb -b deb "parity_"$VER"_armhf.deb"
-    - md5sum "parity_"$VER"_armhf.deb" >> "parity_"$VER"_armhf.deb.md5"
+    - md5sum "parity_"$VER"_armhf.deb" > "parity_"$VER"_armhf.deb.md5"
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
     - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/parity --body target/armv7-unknown-linux-gnueabihf/release/parity
@@ -198,12 +198,12 @@ linux-arm:
     - cat .cargo/config
     - cargo build --target arm-unknown-linux-gnueabihf --release $CARGOFLAGS
     - arm-linux-gnueabihf-strip target/arm-unknown-linux-gnueabihf/release/parity
-    - md5sum target/arm-unknown-linux-gnueabihf/release/parity >> parity.md5
+    - md5sum target/arm-unknown-linux-gnueabihf/release/parity > parity.md5
     - sh scripts/deb-build.sh armhf
     - cp target/arm-unknown-linux-gnueabihf/release/parity deb/usr/bin/parity
     - export VER=$(grep -m 1 version Cargo.toml | awk '{print $3}' | tr -d '"' | tr -d "\n")
     - dpkg-deb -b deb "parity_"$VER"_armhf.deb"
-    - md5sum "parity_"$VER"_armhf.deb" >> "parity_"$VER"_armhf.deb.md5"
+    - md5sum "parity_"$VER"_armhf.deb" > "parity_"$VER"_armhf.deb.md5"
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
     - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/parity --body target/arm-unknown-linux-gnueabihf/release/parity
@@ -238,7 +238,7 @@ linux-armv6:
     - cat .cargo/config
     - cargo build --target arm-unknown-linux-gnueabi --release $CARGOFLAGS
     - arm-linux-gnueabi-strip target/arm-unknown-linux-gnueabi/release/parity
-    - md5sum target/arm-unknown-linux-gnueabi/release/parity >> parity.md5
+    - md5sum target/arm-unknown-linux-gnueabi/release/parity > parity.md5
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
     - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabi/parity --body target/arm-unknown-linux-gnueabi/release/parity
@@ -271,12 +271,12 @@ linux-aarch64:
     - cat .cargo/config
     - cargo build --target aarch64-unknown-linux-gnu --release $CARGOFLAGS
     - aarch64-linux-gnu-strip target/aarch64-unknown-linux-gnu/release/parity
-    - md5sum target/aarch64-unknown-linux-gnu/release/parity >> parity.md5
+    - md5sum target/aarch64-unknown-linux-gnu/release/parity > parity.md5
     - sh scripts/deb-build.sh arm64
     - cp target/aarch64-unknown-linux-gnu/release/parity deb/usr/bin/parity
     - export VER=$(grep -m 1 version Cargo.toml | awk '{print $3}' | tr -d '"' | tr -d "\n")
     - dpkg-deb -b deb "parity_"$VER"_arm64.deb"
-    - md5sum "parity_"$VER"_arm64.deb" >> "parity_"$VER"_arm64.deb.md5"
+    - md5sum "parity_"$VER"_arm64.deb" > "parity_"$VER"_arm64.deb.md5"
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
     - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/parity --body target/aarch64-unknown-linux-gnu/release/parity
@@ -301,7 +301,7 @@ darwin:
   script:
     - cargo build --release $CARGOFLAGS
     - rm -rf parity.md5
-    - md5sum target/release/parity >> parity.md5
+    - md5sum target/release/parity > parity.md5
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
     - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-apple-darwin/parity --body target/release/parity

Cargo.lock

@@ -1249,7 +1249,7 @@ dependencies = [
 [[package]]
 name = "parity-ui-precompiled"
 version = "1.4.0"
-source = "git+https://github.com/ethcore/js-precompiled.git#5d1134b5f836aafccb648e300817524081ac91e3"
+source = "git+https://github.com/ethcore/js-precompiled.git#bf33dd4aabd2adb2178576db5a4d23b8902d39b8"
 dependencies = [
  "parity-dapps-glue 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

dapps/src/apps/fetcher.rs

@@ -47,7 +47,7 @@ pub struct ContentFetcher<R: URLHint = URLHintContract> {
 	resolver: R,
 	cache: Arc<Mutex<ContentCache>>,
 	sync: Arc<SyncStatus>,
-	embeddable_at: Option<u16>,
+	embeddable_on: Option<(String, u16)>,
 }
 
 impl<R: URLHint> Drop for ContentFetcher<R> {
@@ -59,7 +59,7 @@ impl<R: URLHint> Drop for ContentFetcher<R> {
 
 impl<R: URLHint> ContentFetcher<R> {
 
-	pub fn new(resolver: R, sync_status: Arc<SyncStatus>, embeddable_at: Option<u16>) -> Self {
+	pub fn new(resolver: R, sync_status: Arc<SyncStatus>, embeddable_on: Option<(String, u16)>) -> Self {
 		let mut dapps_path = env::temp_dir();
 		dapps_path.push(random_filename());
 
@@ -68,17 +68,17 @@ impl<R: URLHint> ContentFetcher<R> {
 			resolver: resolver,
 			sync: sync_status,
 			cache: Arc::new(Mutex::new(ContentCache::default())),
-			embeddable_at: embeddable_at,
+			embeddable_on: embeddable_on,
 		}
 	}
 
-	fn still_syncing(port: Option<u16>) -> Box<Handler> {
+	fn still_syncing(address: Option<(String, u16)>) -> Box<Handler> {
 		Box::new(ContentHandler::error(
 			StatusCode::ServiceUnavailable,
 			"Sync In Progress",
 			"Your node is still syncing. We cannot resolve any content before it's fully synced.",
 			Some("<a href=\"javascript:window.location.reload()\">Refresh</a>"),
-			port,
+			address,
 		))
 	}
 
@@ -145,7 +145,7 @@ impl<R: URLHint> ContentFetcher<R> {
 					match content {
 						// Don't serve dapps if we are still syncing (but serve content)
 						Some(URLHintResult::Dapp(_)) if self.sync.is_major_importing() => {
-							(None, Self::still_syncing(self.embeddable_at))
+							(None, Self::still_syncing(self.embeddable_on.clone()))
 						},
 						Some(URLHintResult::Dapp(dapp)) => {
 							let (handler, fetch_control) = ContentFetcherHandler::new(
@@ -155,9 +155,9 @@ impl<R: URLHint> ContentFetcher<R> {
 									id: content_id.clone(),
 									dapps_path: self.dapps_path.clone(),
 									on_done: Box::new(on_done),
-									embeddable_at: self.embeddable_at,
+									embeddable_on: self.embeddable_on.clone(),
 								},
-								self.embeddable_at,
+								self.embeddable_on.clone(),
 							);
 
 							(Some(ContentStatus::Fetching(fetch_control)), Box::new(handler) as Box<Handler>)
@@ -172,13 +172,13 @@ impl<R: URLHint> ContentFetcher<R> {
 									content_path: self.dapps_path.clone(),
 									on_done: Box::new(on_done),
 								},
-								self.embeddable_at,
+								self.embeddable_on.clone(),
 							);
 
 							(Some(ContentStatus::Fetching(fetch_control)), Box::new(handler) as Box<Handler>)
 						},
 						None if self.sync.is_major_importing() => {
-							(None, Self::still_syncing(self.embeddable_at))
+							(None, Self::still_syncing(self.embeddable_on.clone()))
 						},
 						None => {
 							// This may happen when sync status changes in between
@@ -188,7 +188,7 @@ impl<R: URLHint> ContentFetcher<R> {
 								"Resource Not Found",
 								"Requested resource was not found.",
 								None,
-								self.embeddable_at,
+								self.embeddable_on.clone(),
 							)) as Box<Handler>)
 						},
 					}
@@ -293,7 +293,7 @@ struct DappInstaller {
 	id: String,
 	dapps_path: PathBuf,
 	on_done: Box<Fn(String, Option<LocalPageEndpoint>) + Send>,
-	embeddable_at: Option<u16>,
+	embeddable_on: Option<(String, u16)>,
 }
 
 impl DappInstaller {
@@ -386,7 +386,7 @@ impl ContentValidator for DappInstaller {
 		try!(manifest_file.write_all(manifest_str.as_bytes()));
 
 		// Create endpoint
-		let app = LocalPageEndpoint::new(target, manifest.clone().into(), PageCache::Enabled, self.embeddable_at);
+		let app = LocalPageEndpoint::new(target, manifest.clone().into(), PageCache::Enabled, self.embeddable_on.clone());
 
 		// Return modified app manifest
 		Ok((manifest.id.clone(), app))

dapps/src/apps/fs.rs

@@ -97,12 +97,12 @@ fn read_manifest(name: &str, mut path: PathBuf) -> EndpointInfo {
 		})
 }
 
-pub fn local_endpoints(dapps_path: String, signer_port: Option<u16>) -> Endpoints {
+pub fn local_endpoints(dapps_path: String, signer_address: Option<(String, u16)>) -> Endpoints {
 	let mut pages = Endpoints::new();
 	for dapp in local_dapps(dapps_path) {
 		pages.insert(
 			dapp.id,
-			Box::new(LocalPageEndpoint::new(dapp.path, dapp.info, PageCache::Disabled, signer_port))
+			Box::new(LocalPageEndpoint::new(dapp.path, dapp.info, PageCache::Disabled, signer_address.clone()))
 		);
 	}
 	pages

dapps/src/apps/mod.rs

@@ -37,26 +37,26 @@ pub fn utils() -> Box<Endpoint> {
 	Box::new(PageEndpoint::with_prefix(parity_ui::App::default(), UTILS_PATH.to_owned()))
 }
 
-pub fn all_endpoints(dapps_path: String, signer_port: Option<u16>) -> Endpoints {
+pub fn all_endpoints(dapps_path: String, signer_address: Option<(String, u16)>) -> Endpoints {
 	// fetch fs dapps at first to avoid overwriting builtins
-	let mut pages = fs::local_endpoints(dapps_path, signer_port);
+	let mut pages = fs::local_endpoints(dapps_path, signer_address.clone());
 
 	// NOTE [ToDr] Dapps will be currently embeded on 8180
-	insert::<parity_ui::App>(&mut pages, "ui", Embeddable::Yes(signer_port));
+	insert::<parity_ui::App>(&mut pages, "ui", Embeddable::Yes(signer_address.clone()));
-	pages.insert("proxy".into(), ProxyPac::boxed(signer_port));
+	pages.insert("proxy".into(), ProxyPac::boxed(signer_address));
 
 	pages
 }
 
 fn insert<T : WebApp + Default + 'static>(pages: &mut Endpoints, id: &str, embed_at: Embeddable) {
 	pages.insert(id.to_owned(), Box::new(match embed_at {
-		Embeddable::Yes(port) => PageEndpoint::new_safe_to_embed(T::default(), port),
+		Embeddable::Yes(address) => PageEndpoint::new_safe_to_embed(T::default(), address),
 		Embeddable::No => PageEndpoint::new(T::default()),
 	}));
 }
 
 enum Embeddable {
-	Yes(Option<u16>),
+	Yes(Option<(String, u16)>),
 	#[allow(dead_code)]
 	No,
 }

dapps/src/handlers/content.rs

@@ -32,7 +32,7 @@ pub struct ContentHandler {
 	content: String,
 	mimetype: Mime,
 	write_pos: usize,
-	safe_to_embed_at_port: Option<u16>,
+	safe_to_embed_on: Option<(String, u16)>,
 }
 
 impl ContentHandler {
@@ -44,31 +44,31 @@ impl ContentHandler {
 		Self::new(StatusCode::NotFound, content, mimetype)
 	}
 
-	pub fn html(code: StatusCode, content: String, embeddable_at: Option<u16>) -> Self {
+	pub fn html(code: StatusCode, content: String, embeddable_on: Option<(String, u16)>) -> Self {
-		Self::new_embeddable(code, content, mime!(Text/Html), embeddable_at)
+		Self::new_embeddable(code, content, mime!(Text/Html), embeddable_on)
 	}
 
-	pub fn error(code: StatusCode, title: &str, message: &str, details: Option<&str>, embeddable_at: Option<u16>) -> Self {
+	pub fn error(code: StatusCode, title: &str, message: &str, details: Option<&str>, embeddable_on: Option<(String, u16)>) -> Self {
 		Self::html(code, format!(
 			include_str!("../error_tpl.html"),
 			title=title,
 			message=message,
 			details=details.unwrap_or_else(|| ""),
 			version=version(),
-		), embeddable_at)
+		), embeddable_on)
 	}
 
 	pub fn new(code: StatusCode, content: String, mimetype: Mime) -> Self {
 		Self::new_embeddable(code, content, mimetype, None)
 	}
 
-	pub fn new_embeddable(code: StatusCode, content: String, mimetype: Mime, embeddable_at: Option<u16>) -> Self {
+	pub fn new_embeddable(code: StatusCode, content: String, mimetype: Mime, embeddable_on: Option<(String, u16)>) -> Self {
 		ContentHandler {
 			code: code,
 			content: content,
 			mimetype: mimetype,
 			write_pos: 0,
-			safe_to_embed_at_port: embeddable_at,
+			safe_to_embed_on: embeddable_on,
 		}
 	}
 }
@@ -85,7 +85,7 @@ impl server::Handler<HttpStream> for ContentHandler {
 	fn on_response(&mut self, res: &mut server::Response) -> Next {
 		res.set_status(self.code);
 		res.headers_mut().set(header::ContentType(self.mimetype.clone()));
-		add_security_headers(&mut res.headers_mut(), self.safe_to_embed_at_port.clone());
+		add_security_headers(&mut res.headers_mut(), self.safe_to_embed_on.clone());
 		Next::write()
 	}
 

dapps/src/handlers/fetch.rs

@@ -138,7 +138,7 @@ pub struct ContentFetcherHandler<H: ContentValidator> {
 	client: Option<Client>,
 	installer: H,
 	request_url: Option<Url>,
-	embeddable_at: Option<u16>,
+	embeddable_on: Option<(String, u16)>,
 }
 
 impl<H: ContentValidator> Drop for ContentFetcherHandler<H> {
@@ -157,7 +157,7 @@ impl<H: ContentValidator> ContentFetcherHandler<H> {
 		url: String,
 		control: Control,
 		handler: H,
-		embeddable_at: Option<u16>,
+		embeddable_on: Option<(String, u16)>,
 	) -> (Self, Arc<FetchControl>) {
 
 		let fetch_control = Arc::new(FetchControl::default());
@@ -169,7 +169,7 @@ impl<H: ContentValidator> ContentFetcherHandler<H> {
 			status: FetchState::NotStarted(url),
 			installer: handler,
 			request_url: None,
-			embeddable_at: embeddable_at,
+			embeddable_on: embeddable_on,
 		};
 
 		(handler, fetch_control)
@@ -208,7 +208,7 @@ impl<H: ContentValidator> server::Handler<HttpStream> for ContentFetcherHandler<
 							"Unable To Start Dapp Download",
 							"Could not initialize download of the dapp. It might be a problem with the remote server.",
 							Some(&format!("{}", e)),
-							self.embeddable_at,
+							self.embeddable_on.clone(),
 						)),
 					}
 				},
@@ -218,7 +218,7 @@ impl<H: ContentValidator> server::Handler<HttpStream> for ContentFetcherHandler<
 					"Method Not Allowed",
 					"Only <code>GET</code> requests are allowed.",
 					None,
-					self.embeddable_at,
+					self.embeddable_on.clone(),
 				)),
 			})
 		} else { None };
@@ -241,7 +241,7 @@ impl<H: ContentValidator> server::Handler<HttpStream> for ContentFetcherHandler<
 					"Download Timeout",
 					&format!("Could not fetch content within {} seconds.", FETCH_TIMEOUT),
 					None,
-					self.embeddable_at,
+					self.embeddable_on.clone(),
 				);
 				Self::close_client(&mut self.client);
 				(Some(FetchState::Error(timeout)), Next::write())
@@ -263,7 +263,7 @@ impl<H: ContentValidator> server::Handler<HttpStream> for ContentFetcherHandler<
 									"Invalid Dapp",
 									"Downloaded bundle does not contain a valid content.",
 									Some(&format!("{:?}", e)),
-									self.embeddable_at,
+									self.embeddable_on.clone(),
 								))
 							},
 							Ok((id, result)) => {
@@ -284,7 +284,7 @@ impl<H: ContentValidator> server::Handler<HttpStream> for ContentFetcherHandler<
 							"Download Error",
 							"There was an error when fetching the content.",
 							Some(&format!("{:?}", e)),
-							self.embeddable_at,
+							self.embeddable_on.clone(),
 						);
 						(Some(FetchState::Error(error)), Next::write())
 					},

dapps/src/handlers/mod.rs

@@ -30,18 +30,18 @@ pub use self::fetch::{ContentFetcherHandler, ContentValidator, FetchControl};
 
 use url::Url;
 use hyper::{server, header, net, uri};
-use signer_address;
+use address;
 
 /// Adds security-related headers to the Response.
-pub fn add_security_headers(headers: &mut header::Headers, embeddable_at: Option<u16>) {
+pub fn add_security_headers(headers: &mut header::Headers, embeddable_on: Option<(String, u16)>) {
 	headers.set_raw("X-XSS-Protection", vec![b"1; mode=block".to_vec()]);
 	headers.set_raw("X-Content-Type-Options", vec![b"nosniff".to_vec()]);
 
 	// Embedding header:
-	if let Some(port) = embeddable_at {
+	if let Some(embeddable_on) = embeddable_on {
 		headers.set_raw(
 			"X-Frame-Options",
-			vec![format!("ALLOW-FROM http://{}", signer_address(port)).into_bytes()]
+			vec![format!("ALLOW-FROM http://{}", address(embeddable_on)).into_bytes()]
 			);
 	} else {
 		// TODO [ToDr] Should we be more strict here (DENY?)?

dapps/src/lib.rs

@@ -112,7 +112,7 @@ pub struct ServerBuilder {
 	handler: Arc<IoHandler>,
 	registrar: Arc<ContractClient>,
 	sync_status: Arc<SyncStatus>,
-	signer_port: Option<u16>,
+	signer_address: Option<(String, u16)>,
 }
 
 impl Extendable for ServerBuilder {
@@ -129,7 +129,7 @@ impl ServerBuilder {
 			handler: Arc::new(IoHandler::new()),
 			registrar: registrar,
 			sync_status: Arc::new(|| false),
-			signer_port: None,
+			signer_address: None,
 		}
 	}
 
@@ -139,8 +139,8 @@ impl ServerBuilder {
 	}
 
 	/// Change default signer port.
-	pub fn with_signer_port(&mut self, signer_port: Option<u16>) {
+	pub fn with_signer_address(&mut self, signer_address: Option<(String, u16)>) {
-		self.signer_port = signer_port;
+		self.signer_address = signer_address;
 	}
 
 	/// Asynchronously start server with no authentication,
@@ -152,7 +152,7 @@ impl ServerBuilder {
 			NoAuth,
 			self.handler.clone(),
 			self.dapps_path.clone(),
-			self.signer_port.clone(),
+			self.signer_address.clone(),
 			self.registrar.clone(),
 			self.sync_status.clone(),
 		)
@@ -167,7 +167,7 @@ impl ServerBuilder {
 			HttpBasicAuth::single_user(username, password),
 			self.handler.clone(),
 			self.dapps_path.clone(),
-			self.signer_port.clone(),
+			self.signer_address.clone(),
 			self.registrar.clone(),
 			self.sync_status.clone(),
 		)
@@ -197,11 +197,11 @@ impl Server {
 	}
 
 	/// Returns a list of CORS domains for API endpoint.
-	fn cors_domains(signer_port: Option<u16>) -> Vec<String> {
+	fn cors_domains(signer_address: Option<(String, u16)>) -> Vec<String> {
-		match signer_port {
+		match signer_address {
-			Some(port) => vec![
+			Some(signer_address) => vec![
 				format!("http://{}{}", HOME_PAGE, DAPPS_DOMAIN),
-				format!("http://{}", signer_address(port)),
+				format!("http://{}", address(signer_address)),
 			],
 			None => vec![],
 		}
@@ -213,15 +213,15 @@ impl Server {
 		authorization: A,
 		handler: Arc<IoHandler>,
 		dapps_path: String,
-		signer_port: Option<u16>,
+		signer_address: Option<(String, u16)>,
 		registrar: Arc<ContractClient>,
 		sync_status: Arc<SyncStatus>,
 	) -> Result<Server, ServerError> {
 		let panic_handler = Arc::new(Mutex::new(None));
 		let authorization = Arc::new(authorization);
-		let content_fetcher = Arc::new(apps::fetcher::ContentFetcher::new(apps::urlhint::URLHintContract::new(registrar), sync_status, signer_port));
+		let content_fetcher = Arc::new(apps::fetcher::ContentFetcher::new(apps::urlhint::URLHintContract::new(registrar), sync_status, signer_address.clone()));
-		let endpoints = Arc::new(apps::all_endpoints(dapps_path, signer_port.clone()));
+		let endpoints = Arc::new(apps::all_endpoints(dapps_path, signer_address.clone()));
-		let cors_domains = Self::cors_domains(signer_port);
+		let cors_domains = Self::cors_domains(signer_address.clone());
 
 		let special = Arc::new({
 			let mut special = HashMap::new();
@@ -238,7 +238,7 @@ impl Server {
 		try!(hyper::Server::http(addr))
 			.handle(move |ctrl| router::Router::new(
 				ctrl,
-				signer_port.clone(),
+				signer_address.clone(),
 				content_fetcher.clone(),
 				endpoints.clone(),
 				special.clone(),
@@ -302,8 +302,8 @@ pub fn random_filename() -> String {
 	rng.gen_ascii_chars().take(12).collect()
 }
 
-fn signer_address(port: u16) -> String {
+fn address(address: (String, u16)) -> String {
-	format!("127.0.0.1:{}", port)
+	format!("{}:{}", address.0, address.1)
 }
 
 #[cfg(test)]
@@ -332,7 +332,7 @@ mod util_tests {
 
 		// when
 		let none = Server::cors_domains(None);
-		let some = Server::cors_domains(Some(18180));
+		let some = Server::cors_domains(Some(("127.0.0.1".into(), 18180)));
 
 		// then
 		assert_eq!(none, Vec::<String>::new());

dapps/src/page/builtin.rs

@@ -25,7 +25,7 @@ pub struct PageEndpoint<T : WebApp + 'static> {
 	/// Prefix to strip from the path (when `None` deducted from `app_id`)
 	pub prefix: Option<String>,
 	/// Safe to be loaded in frame by other origin. (use wisely!)
-	safe_to_embed_at_port: Option<u16>,
+	safe_to_embed_on: Option<(String, u16)>,
 	info: EndpointInfo,
 }
 
@@ -36,7 +36,7 @@ impl<T: WebApp + 'static> PageEndpoint<T> {
 		PageEndpoint {
 			app: Arc::new(app),
 			prefix: None,
-			safe_to_embed_at_port: None,
+			safe_to_embed_on: None,
 			info: EndpointInfo::from(info),
 		}
 	}
@@ -49,7 +49,7 @@ impl<T: WebApp + 'static> PageEndpoint<T> {
 		PageEndpoint {
 			app: Arc::new(app),
 			prefix: Some(prefix),
-			safe_to_embed_at_port: None,
+			safe_to_embed_on: None,
 			info: EndpointInfo::from(info),
 		}
 	}
@@ -57,12 +57,12 @@ impl<T: WebApp + 'static> PageEndpoint<T> {
 	/// Creates new `PageEndpoint` which can be safely used in iframe
 	/// even from different origin. It might be dangerous (clickjacking).
 	/// Use wisely!
-	pub fn new_safe_to_embed(app: T, port: Option<u16>) -> Self {
+	pub fn new_safe_to_embed(app: T, address: Option<(String, u16)>) -> Self {
 		let info = app.info();
 		PageEndpoint {
 			app: Arc::new(app),
 			prefix: None,
-			safe_to_embed_at_port: port,
+			safe_to_embed_on: address,
 			info: EndpointInfo::from(info),
 		}
 	}
@@ -79,9 +79,9 @@ impl<T: WebApp> Endpoint for PageEndpoint<T> {
 			app: BuiltinDapp::new(self.app.clone()),
 			prefix: self.prefix.clone(),
 			path: path,
-			file: handler::ServedFile::new(self.safe_to_embed_at_port.clone()),
+			file: handler::ServedFile::new(self.safe_to_embed_on.clone()),
 			cache: PageCache::Disabled,
-			safe_to_embed_at_port: self.safe_to_embed_at_port.clone(),
+			safe_to_embed_on: self.safe_to_embed_on.clone(),
 		})
 	}
 }

dapps/src/page/handler.rs

@@ -60,13 +60,13 @@ pub enum ServedFile<T: Dapp> {
 }
 
 impl<T: Dapp> ServedFile<T> {
-	pub fn new(embeddable_at: Option<u16>) -> Self {
+	pub fn new(embeddable_on: Option<(String, u16)>) -> Self {
 		ServedFile::Error(ContentHandler::error(
 			StatusCode::NotFound,
 			"404 Not Found",
 			"Requested dapp resource was not found.",
 			None,
-			embeddable_at,
+			embeddable_on,
 		))
 	}
 }
@@ -97,7 +97,7 @@ pub struct PageHandler<T: Dapp> {
 	/// Requested path.
 	pub path: EndpointPath,
 	/// Flag indicating if the file can be safely embeded (put in iframe).
-	pub safe_to_embed_at_port: Option<u16>,
+	pub safe_to_embed_on: Option<(String, u16)>,
 	/// Cache settings for this page.
 	pub cache: PageCache,
 }
@@ -133,7 +133,7 @@ impl<T: Dapp> server::Handler<HttpStream> for PageHandler<T> {
 				self.app.file(&self.extract_path(url.path()))
 			},
 			_ => None,
-		}.map_or_else(|| ServedFile::new(self.safe_to_embed_at_port.clone()), |f| ServedFile::File(f));
+		}.map_or_else(|| ServedFile::new(self.safe_to_embed_on.clone()), |f| ServedFile::File(f));
 		Next::write()
 	}
 
@@ -162,7 +162,7 @@ impl<T: Dapp> server::Handler<HttpStream> for PageHandler<T> {
 				}
 
 				// Security headers:
-				add_security_headers(&mut res.headers_mut(), self.safe_to_embed_at_port);
+				add_security_headers(&mut res.headers_mut(), self.safe_to_embed_on.clone());
 				Next::write()
 			},
 			ServedFile::Error(ref mut handler) => {
@@ -246,7 +246,7 @@ fn should_extract_path_with_appid() {
 		},
 		file: ServedFile::new(None),
 		cache: Default::default(),
-		safe_to_embed_at_port: None,
+		safe_to_embed_on: None,
 	};
 
 	// when

dapps/src/page/local.rs

@@ -27,17 +27,17 @@ pub struct LocalPageEndpoint {
 	mime: Option<String>,
 	info: Option<EndpointInfo>,
 	cache: PageCache,
-	embeddable_at: Option<u16>,
+	embeddable_on: Option<(String, u16)>,
 }
 
 impl LocalPageEndpoint {
-	pub fn new(path: PathBuf, info: EndpointInfo, cache: PageCache, embeddable_at: Option<u16>) -> Self {
+	pub fn new(path: PathBuf, info: EndpointInfo, cache: PageCache, embeddable_on: Option<(String, u16)>) -> Self {
 		LocalPageEndpoint {
 			path: path,
 			mime: None,
 			info: Some(info),
 			cache: cache,
-			embeddable_at: embeddable_at,
+			embeddable_on: embeddable_on,
 		}
 	}
 
@@ -47,7 +47,7 @@ impl LocalPageEndpoint {
 			mime: Some(mime),
 			info: None,
 			cache: cache,
-			embeddable_at: None,
+			embeddable_on: None,
 		}
 	}
 
@@ -68,7 +68,7 @@ impl Endpoint for LocalPageEndpoint {
 				prefix: None,
 				path: path,
 				file: handler::ServedFile::new(None),
-				safe_to_embed_at_port: self.embeddable_at,
+				safe_to_embed_on: self.embeddable_on.clone(),
 				cache: self.cache,
 			})
 		} else {
@@ -77,7 +77,7 @@ impl Endpoint for LocalPageEndpoint {
 				prefix: None,
 				path: path,
 				file: handler::ServedFile::new(None),
-				safe_to_embed_at_port: self.embeddable_at,
+				safe_to_embed_on: self.embeddable_on.clone(),
 				cache: self.cache,
 			})
 		}

dapps/src/proxypac.rs

@@ -19,24 +19,24 @@
 use endpoint::{Endpoint, Handler, EndpointPath};
 use handlers::ContentHandler;
 use apps::{HOME_PAGE, DAPPS_DOMAIN};
-use signer_address;
+use address;
 
 pub struct ProxyPac {
-	signer_port: Option<u16>,
+	signer_address: Option<(String, u16)>,
 }
 
 impl ProxyPac {
-	pub fn boxed(signer_port: Option<u16>) -> Box<Endpoint> {
+	pub fn boxed(signer_address: Option<(String, u16)>) -> Box<Endpoint> {
 		Box::new(ProxyPac {
-			signer_port: signer_port
+			signer_address: signer_address
 		})
 	}
 }
 
 impl Endpoint for ProxyPac {
 	fn to_handler(&self, path: EndpointPath) -> Box<Handler> {
-		let signer = self.signer_port
+		let signer = self.signer_address.clone()
-			.map(signer_address)
+			.map(address)
 			.unwrap_or_else(|| format!("{}:{}", path.host, path.port));
 
 		let content = format!(

dapps/src/router/mod.rs

@@ -20,7 +20,7 @@
 pub mod auth;
 mod host_validation;
 
-use signer_address;
+use address;
 use std::sync::Arc;
 use std::collections::HashMap;
 use url::{Url, Host};
@@ -43,7 +43,7 @@ pub enum SpecialEndpoint {
 
 pub struct Router<A: Authorization + 'static> {
 	control: Option<Control>,
-	signer_port: Option<u16>,
+	signer_address: Option<(String, u16)>,
 	endpoints: Arc<Endpoints>,
 	fetch: Arc<ContentFetcher>,
 	special: Arc<HashMap<SpecialEndpoint, Box<Endpoint>>>,
@@ -117,22 +117,22 @@ impl<A: Authorization + 'static> server::Handler<HttpStream> for Router<A> {
 					"404 Not Found",
 					"Requested content was not found.",
 					None,
-					self.signer_port,
+					self.signer_address.clone(),
 				))
 			},
 			// Redirect any other GET request to signer.
 			_ if *req.method() == hyper::Method::Get => {
-				if let Some(port) = self.signer_port {
+				if let Some(signer_address) = self.signer_address.clone() {
 					trace!(target: "dapps", "Redirecting to signer interface.");
-					Redirection::boxed(&format!("http://{}", signer_address(port)))
+					Redirection::boxed(&format!("http://{}", address(signer_address)))
 				} else {
 					trace!(target: "dapps", "Signer disabled, returning 404.");
 					Box::new(ContentHandler::error(
 						StatusCode::NotFound,
 						"404 Not Found",
 						"Your homepage is not available when Trusted Signer is disabled.",
-						Some("You can still access dapps by writing a correct address, though. Re-enabled Signer to get your homepage back."),
+						Some("You can still access dapps by writing a correct address, though. Re-enable Signer to get your homepage back."),
-						self.signer_port,
+						self.signer_address.clone(),
 					))
 				}
 			},
@@ -168,7 +168,7 @@ impl<A: Authorization + 'static> server::Handler<HttpStream> for Router<A> {
 impl<A: Authorization> Router<A> {
 	pub fn new(
 		control: Control,
-		signer_port: Option<u16>,
+		signer_address: Option<(String, u16)>,
 		content_fetcher: Arc<ContentFetcher>,
 		endpoints: Arc<Endpoints>,
 		special: Arc<HashMap<SpecialEndpoint, Box<Endpoint>>>,
@@ -181,7 +181,7 @@ impl<A: Authorization> Router<A> {
 			.to_handler(EndpointPath::default());
 		Router {
 			control: Some(control),
-			signer_port: signer_port,
+			signer_address: signer_address,
 			endpoints: endpoints,
 			fetch: content_fetcher,
 			special: special,

dapps/src/tests/helpers.rs

@@ -76,7 +76,7 @@ pub fn init_server(hosts: Option<Vec<String>>, is_syncing: bool) -> (Server, Arc
 	dapps_path.push("non-existent-dir-to-prevent-fs-files-from-loading");
 	let mut builder = ServerBuilder::new(dapps_path.to_str().unwrap().into(), registrar.clone());
 	builder.with_sync_status(Arc::new(move || is_syncing));
-	builder.with_signer_port(Some(SIGNER_PORT));
+	builder.with_signer_address(Some(("127.0.0.1".into(), SIGNER_PORT)));
 	(
 		builder.start_unsecured_http(&"127.0.0.1:0".parse().unwrap(), hosts).unwrap(),
 		registrar,
@@ -89,7 +89,7 @@ pub fn serve_with_auth(user: &str, pass: &str) -> Server {
 	let mut dapps_path = env::temp_dir();
 	dapps_path.push("non-existent-dir-to-prevent-fs-files-from-loading");
 	let mut builder = ServerBuilder::new(dapps_path.to_str().unwrap().into(), registrar);
-	builder.with_signer_port(Some(SIGNER_PORT));
+	builder.with_signer_address(Some(("127.0.0.1".into(), SIGNER_PORT)));
 	builder.start_basic_auth_http(&"127.0.0.1:0".parse().unwrap(), None, user, pass).unwrap()
 }
 

devtools/src/http_client.rs

@@ -14,6 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+use std::thread;
 use std::time::Duration;
 use std::io::{Read, Write};
 use std::str::{self, Lines};
@@ -42,8 +43,28 @@ pub fn read_block(lines: &mut Lines, all: bool) -> String {
 	block
 }
 
+fn connect(address: &SocketAddr) -> TcpStream {
+	let mut retries = 0;
+	let mut last_error = None;
+	while retries < 10 {
+		retries += 1;
+
+		let res = TcpStream::connect(address);
+		match res {
+			Ok(stream) => {
+				return stream;
+			},
+			Err(e) => {
+				last_error = Some(e);
+				thread::sleep(Duration::from_millis(retries * 10));
+			}
+		}
+	}
+	panic!("Unable to connect to the server. Last error: {:?}", last_error);
+}
+
 pub fn request(address: &SocketAddr, request: &str) -> Response {
-	let mut req = TcpStream::connect(address).unwrap();
+	let mut req = connect(address);
 	req.set_read_timeout(Some(Duration::from_secs(1))).unwrap();
 	req.write_all(request.as_bytes()).unwrap();
 

ethcore/light/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+description = "Parity LES primitives"
+homepage = "https://ethcore.io"
+license = "GPL-3.0"
+name = "ethcore-light"
+version = "1.5.0"
+authors = ["Ethcore <admin@ethcore.io>"]
+
+[dependencies]
+log = "0.3"
+ethcore = { path = ".." }
+ethcore-util = { path = "../../util" }
+ethcore-network = { path = "../../util/network" }
+ethcore-io = { path = "../../util/io" }
+rlp = { path = "../../util/rlp" }
+time = "0.1"

ethcore/light/src/client.rs

@@ -0,0 +1,115 @@
+// 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/>.
+
+//! Light client implementation. Used for raw data queries as well as the header
+//! sync.
+
+use std::sync::Arc;
+
+use ethcore::engines::Engine;
+use ethcore::ids::BlockID;
+use ethcore::service::ClientIoMessage;
+use ethcore::block_import_error::BlockImportError;
+use ethcore::block_status::BlockStatus;
+use ethcore::verification::queue::{HeaderQueue, QueueInfo};
+use ethcore::transaction::SignedTransaction;
+use ethcore::blockchain_info::BlockChainInfo;
+
+use io::IoChannel;
+use util::hash::H256;
+use util::{Bytes, Mutex};
+
+use provider::Provider;
+use request;
+
+/// Light client implementation.
+pub struct Client {
+	engine: Arc<Engine>,
+	header_queue: HeaderQueue,
+	message_channel: Mutex<IoChannel<ClientIoMessage>>,
+}
+
+impl Client {
+	/// Import a header as rlp-encoded bytes.
+	pub fn import_header(&self, bytes: Bytes) -> Result<H256, BlockImportError> {
+		let header = ::rlp::decode(&bytes);
+
+		self.header_queue.import(header).map_err(Into::into)
+	}
+
+	/// Whether the block is already known (but not necessarily part of the canonical chain)
+	pub fn is_known(&self, _id: BlockID) -> bool {
+		false
+	}
+
+	/// Fetch a vector of all pending transactions.
+	pub fn pending_transactions(&self) -> Vec<SignedTransaction> {
+		vec![]
+	}
+
+	/// Inquire about the status of a given block.
+	pub fn status(&self, _id: BlockID) -> BlockStatus {
+		BlockStatus::Unknown
+	}
+
+	/// Get the header queue info.
+	pub fn queue_info(&self) -> QueueInfo {
+		self.header_queue.queue_info()
+	}
+}
+
+// dummy implementation -- may draw from canonical cache further on.
+impl Provider for Client {
+	fn chain_info(&self) -> BlockChainInfo {
+		unimplemented!()
+	}
+
+	fn reorg_depth(&self, _a: &H256, _b: &H256) -> Option<u64> {
+		None
+	}
+
+	fn earliest_state(&self) -> Option<u64> {
+		None
+	}
+
+	fn block_headers(&self, _req: request::Headers) -> Vec<Bytes> {
+		Vec::new()
+	}
+
+	fn block_bodies(&self, _req: request::Bodies) -> Vec<Bytes> {
+		Vec::new()
+	}
+
+	fn receipts(&self, _req: request::Receipts) -> Vec<Bytes> {
+		Vec::new()
+	}
+
+	fn proofs(&self, _req: request::StateProofs) -> Vec<Bytes> {
+		Vec::new()
+	}
+
+	fn code(&self, _req: request::ContractCodes) -> Vec<Bytes> {
+		Vec::new()
+	}
+
+	fn header_proofs(&self, _req: request::HeaderProofs) -> Vec<Bytes> {
+		Vec::new()
+	}
+
+	fn pending_transactions(&self) -> Vec<SignedTransaction> {
+		Vec::new()
+	}
+}

ethcore/light/src/lib.rs

@@ -0,0 +1,47 @@
+// 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/>.
+
+//! Light client logic and implementation.
+//!
+//! A "light" client stores very little chain-related data locally
+//! unlike a full node, which stores all blocks, headers, receipts, and more.
+//!
+//! This enables the client to have a much lower resource footprint in
+//! exchange for the cost of having to ask the network for state data
+//! while responding to queries. This makes a light client unsuitable for
+//! low-latency applications, but perfectly suitable for simple everyday
+//! use-cases like sending transactions from a personal account.
+//!
+//! 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.
+#![allow(dead_code)]
+
+pub mod client;
+pub mod net;
+pub mod provider;
+pub mod request;
+
+extern crate ethcore_util as util;
+extern crate ethcore_network as network;
+extern crate ethcore_io as io;
+extern crate ethcore;
+extern crate rlp;
+extern crate time;
+
+#[macro_use]
+extern crate log;

ethcore/light/src/net/buffer_flow.rs

@@ -0,0 +1,264 @@
+// 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/>.
+
+//! LES buffer flow management.
+//!
+//! Every request in the LES protocol leads to a reduction
+//! of the requester's buffer value as a rate-limiting mechanism.
+//! This buffer value will recharge at a set rate.
+//!
+//! This module provides an interface for configuration of buffer
+//! flow costs and recharge rates.
+
+use request;
+use super::packet;
+use super::error::Error;
+
+use rlp::*;
+use util::U256;
+use time::{Duration, SteadyTime};
+
+/// A request cost specification.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Cost(pub U256, pub U256);
+
+/// Buffer value.
+///
+/// Produced and recharged using `FlowParams`.
+/// Definitive updates can be made as well -- these will reset the recharge
+/// point to the time of the update.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Buffer {
+	estimate: U256,
+	recharge_point: SteadyTime,
+}
+
+impl Buffer {
+	/// Get the current buffer value.
+	pub fn current(&self) -> U256 { self.estimate.clone() }
+
+	/// Make a definitive update.
+	/// This will be the value obtained after receiving
+	/// a response to a request.
+	pub fn update_to(&mut self, value: U256) {
+		self.estimate = value;
+		self.recharge_point = SteadyTime::now();
+	}
+
+	/// Attempt to apply the given cost to the buffer.
+	///
+	/// If successful, the cost will be deducted successfully.
+	///
+	/// If unsuccessful, the structure will be unaltered an an
+	/// error will be produced.
+	pub fn deduct_cost(&mut self, cost: U256) -> Result<(), Error> {
+		match cost > self.estimate {
+			true => Err(Error::BufferEmpty),
+			false => {
+				self.estimate = self.estimate - cost;
+				Ok(())
+			}
+		}
+	}
+}
+
+/// A cost table, mapping requests to base and per-request costs.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct CostTable {
+	headers: Cost,
+	bodies: Cost,
+	receipts: Cost,
+	state_proofs: Cost,
+	contract_codes: Cost,
+	header_proofs: Cost,
+}
+
+impl Default for CostTable {
+	fn default() -> Self {
+		// arbitrarily chosen constants.
+		CostTable {
+			headers: Cost(100000.into(), 10000.into()),
+			bodies: Cost(150000.into(), 15000.into()),
+			receipts: Cost(50000.into(), 5000.into()),
+			state_proofs: Cost(250000.into(), 25000.into()),
+			contract_codes: Cost(200000.into(), 20000.into()),
+			header_proofs: Cost(150000.into(), 15000.into()),
+		}
+	}
+}
+
+impl RlpEncodable for CostTable {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		fn append_cost(s: &mut RlpStream, msg_id: u8, cost: &Cost) {
+			s.begin_list(3)
+				.append(&msg_id)
+				.append(&cost.0)
+				.append(&cost.1);
+		}
+
+		s.begin_list(6);
+
+		append_cost(s, packet::GET_BLOCK_HEADERS, &self.headers);
+		append_cost(s, packet::GET_BLOCK_BODIES, &self.bodies);
+		append_cost(s, packet::GET_RECEIPTS, &self.receipts);
+		append_cost(s, packet::GET_PROOFS, &self.state_proofs);
+		append_cost(s, packet::GET_CONTRACT_CODES, &self.contract_codes);
+		append_cost(s, packet::GET_HEADER_PROOFS, &self.header_proofs);
+	}
+}
+
+impl RlpDecodable for CostTable {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		let rlp = decoder.as_rlp();
+
+		let mut headers = None;
+		let mut bodies = None;
+		let mut receipts = None;
+		let mut state_proofs = None;
+		let mut contract_codes = None;
+		let mut header_proofs = None;
+
+		for row in rlp.iter() {
+			let msg_id: u8 = try!(row.val_at(0));
+			let cost = {
+				let base = try!(row.val_at(1));
+				let per = try!(row.val_at(2));
+
+				Cost(base, per)
+			};
+
+			match msg_id {
+				packet::GET_BLOCK_HEADERS => headers = Some(cost),
+				packet::GET_BLOCK_BODIES => bodies = Some(cost),
+				packet::GET_RECEIPTS => receipts = Some(cost),
+				packet::GET_PROOFS => state_proofs = Some(cost),
+				packet::GET_CONTRACT_CODES => contract_codes = Some(cost),
+				packet::GET_HEADER_PROOFS => header_proofs = Some(cost),
+				_ => return Err(DecoderError::Custom("Unrecognized message in cost table")),
+			}
+		}
+
+		Ok(CostTable {
+			headers: try!(headers.ok_or(DecoderError::Custom("No headers cost specified"))),
+			bodies: try!(bodies.ok_or(DecoderError::Custom("No bodies cost specified"))),
+			receipts: try!(receipts.ok_or(DecoderError::Custom("No receipts cost specified"))),
+			state_proofs: try!(state_proofs.ok_or(DecoderError::Custom("No proofs cost specified"))),
+			contract_codes: try!(contract_codes.ok_or(DecoderError::Custom("No contract codes specified"))),
+			header_proofs: try!(header_proofs.ok_or(DecoderError::Custom("No header proofs cost specified"))),
+		})
+	}
+}
+
+/// A buffer-flow manager handles costs, recharge, limits
+#[derive(Debug, Clone, PartialEq)]
+pub struct FlowParams {
+	costs: CostTable,
+	limit: U256,
+	recharge: U256,
+}
+
+impl FlowParams {
+	/// Create new flow parameters from a request cost table,
+	/// buffer limit, and (minimum) rate of recharge.
+	pub fn new(limit: U256, costs: CostTable, recharge: U256) -> Self {
+		FlowParams {
+			costs: costs,
+			limit: limit,
+			recharge: recharge,
+		}
+	}
+
+	/// Get a reference to the buffer limit.
+	pub fn limit(&self) -> &U256 { &self.limit }
+
+	/// Get a reference to the cost table.
+	pub fn cost_table(&self) -> &CostTable { &self.costs }
+
+	/// Get a reference to the recharge rate.
+	pub fn recharge_rate(&self) -> &U256 { &self.recharge }
+
+	/// Compute the actual cost of a request, given the kind of request
+	/// and number of requests made.
+	pub fn compute_cost(&self, kind: request::Kind, amount: usize) -> U256 {
+		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 amount: U256 = amount.into();
+		cost.0 + (amount * cost.1)
+	}
+
+	/// Create initial buffer parameter.
+	pub fn create_buffer(&self) -> Buffer {
+		Buffer {
+			estimate: self.limit,
+			recharge_point: SteadyTime::now(),
+		}
+	}
+
+	/// Recharge the buffer based on time passed since last
+	/// update.
+	pub fn recharge(&self, buf: &mut Buffer) {
+		let now = SteadyTime::now();
+
+		// recompute and update only in terms of full seconds elapsed
+		// in order to keep the estimate as an underestimate.
+		let elapsed = (now - buf.recharge_point).num_seconds();
+		buf.recharge_point = buf.recharge_point + Duration::seconds(elapsed);
+
+		let elapsed: U256 = elapsed.into();
+
+		buf.estimate = ::std::cmp::min(self.limit, buf.estimate + (elapsed * self.recharge));
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+
+	#[test]
+	fn should_serialize_cost_table() {
+		let costs = CostTable::default();
+		let serialized = ::rlp::encode(&costs);
+
+		let new_costs: CostTable = ::rlp::decode(&*serialized);
+
+		assert_eq!(costs, new_costs);
+	}
+
+	#[test]
+	fn buffer_mechanism() {
+		use std::thread;
+		use std::time::Duration;
+
+		let flow_params = FlowParams::new(100.into(), Default::default(), 20.into());
+		let mut buffer =  flow_params.create_buffer();
+
+		assert!(buffer.deduct_cost(101.into()).is_err());
+		assert!(buffer.deduct_cost(10.into()).is_ok());
+
+		thread::sleep(Duration::from_secs(1));
+
+		flow_params.recharge(&mut buffer);
+
+		assert_eq!(buffer.estimate, 100.into());
+	}
+}

ethcore/light/src/net/error.rs

@@ -0,0 +1,94 @@
+// 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/>.
+
+//! Defines error types and levels of punishment to use upon
+//! encountering.
+
+use rlp::DecoderError;
+use network::NetworkError;
+
+use std::fmt;
+
+/// Levels of punishment.
+///
+/// Currently just encompasses two different kinds of disconnect and
+/// no punishment, but this is where reputation systems might come into play.
+// In ascending order
+#[derive(Debug, PartialEq, Eq)]
+pub enum Punishment {
+	/// Perform no punishment.
+	None,
+	/// Disconnect the peer, but don't prevent them from reconnecting.
+	Disconnect,
+	/// Disconnect the peer and prevent them from reconnecting.
+	Disable,
+}
+
+/// Kinds of errors which can be encountered in the course of LES.
+#[derive(Debug)]
+pub enum Error {
+	/// An RLP decoding error.
+	Rlp(DecoderError),
+	/// A network error.
+	Network(NetworkError),
+	/// Out of buffer.
+	BufferEmpty,
+	/// Unrecognized packet code.
+	UnrecognizedPacket(u8),
+	/// Unexpected handshake.
+	UnexpectedHandshake,
+	/// Peer on wrong network (wrong NetworkId or genesis hash)
+	WrongNetwork,
+}
+
+impl Error {
+	/// What level of punishment does this error warrant?
+	pub fn punishment(&self) -> Punishment {
+		match *self {
+			Error::Rlp(_) => Punishment::Disable,
+			Error::Network(_) => Punishment::None,
+			Error::BufferEmpty => Punishment::Disable,
+			Error::UnrecognizedPacket(_) => Punishment::Disconnect,
+			Error::UnexpectedHandshake => Punishment::Disconnect,
+			Error::WrongNetwork => Punishment::Disable,
+		}
+	}
+}
+
+impl From<DecoderError> for Error {
+	fn from(err: DecoderError) -> Self {
+		Error::Rlp(err)
+	}
+}
+
+impl From<NetworkError> for Error {
+	fn from(err: NetworkError) -> Self {
+		Error::Network(err)
+	}
+}
+
+impl fmt::Display for Error {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		match *self {
+			Error::Rlp(ref err) => err.fmt(f),
+			Error::Network(ref err) => err.fmt(f),
+			Error::BufferEmpty => write!(f, "Out of buffer"),
+			Error::UnrecognizedPacket(code) => write!(f, "Unrecognized packet: 0x{:x}", code),
+			Error::UnexpectedHandshake => write!(f, "Unexpected handshake"),
+			Error::WrongNetwork => write!(f, "Wrong network"),
+		}
+	}
+}

ethcore/light/src/net/mod.rs

@@ -0,0 +1,506 @@
+// 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/>.
+
+//! LES Protocol Version 1 implementation.
+//!
+//! This uses a "Provider" to answer requests.
+//! See https://github.com/ethcore/parity/wiki/Light-Ethereum-Subprotocol-(LES)
+
+use io::TimerToken;
+use network::{NetworkProtocolHandler, NetworkContext, NetworkError, PeerId};
+use rlp::{RlpStream, Stream, UntrustedRlp, View};
+use util::hash::H256;
+use util::RwLock;
+
+use std::collections::{HashMap, HashSet};
+use std::sync::atomic::AtomicUsize;
+
+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;
+
+const TIMEOUT: TimerToken = 0;
+const TIMEOUT_INTERVAL_MS: u64 = 1000;
+
+// LPV1
+const PROTOCOL_VERSION: u32 = 1;
+
+// TODO [rob] make configurable.
+const PROTOCOL_ID: [u8; 3] = *b"les";
+
+// packet ID definitions.
+mod packet {
+	// the status packet.
+	pub const STATUS: u8 = 0x00;
+
+	// announcement of new block hashes or capabilities.
+	pub const ANNOUNCE: u8 = 0x01;
+
+	// request and response for block headers
+	pub const GET_BLOCK_HEADERS: u8 = 0x02;
+	pub const BLOCK_HEADERS: u8 = 0x03;
+
+	// request and response for block bodies
+	pub const GET_BLOCK_BODIES: u8 = 0x04;
+	pub const BLOCK_BODIES: u8 = 0x05;
+
+	// request and response for transaction receipts.
+	pub const GET_RECEIPTS: u8 = 0x06;
+	pub const RECEIPTS: u8 = 0x07;
+
+	// request and response for merkle proofs.
+	pub const GET_PROOFS: u8 = 0x08;
+	pub const PROOFS: u8 = 0x09;
+
+	// request and response for contract code.
+	pub const GET_CONTRACT_CODES: u8 = 0x0a;
+	pub const CONTRACT_CODES: u8 = 0x0b;
+
+	// relay transactions to peers.
+	pub const SEND_TRANSACTIONS: u8 = 0x0c;
+
+	// request and response for header proofs in a CHT.
+	pub const GET_HEADER_PROOFS: u8 = 0x0d;
+	pub const HEADER_PROOFS: u8 = 0x0e;
+}
+
+// A pending peer: one we've sent our status to but
+// may not have received one for.
+struct PendingPeer {
+	sent_head: H256,
+}
+
+// data about each peer.
+struct Peer {
+	local_buffer: Buffer, // their buffer relative to us
+	remote_buffer: Buffer, // our buffer relative to them
+	current_asking: HashSet<usize>, // pending request ids.
+	status: Status,
+	capabilities: Capabilities,
+	remote_flow: FlowParams,
+	sent_head: H256, // last head we've given them.
+}
+
+/// 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.
+pub struct LightProtocol {
+	provider: Box<Provider>,
+	genesis_hash: H256,
+	network_id: status::NetworkId,
+	pending_peers: RwLock<HashMap<PeerId, PendingPeer>>,
+	peers: RwLock<HashMap<PeerId, Peer>>,
+	pending_requests: RwLock<HashMap<usize, Request>>,
+	capabilities: RwLock<Capabilities>,
+	flow_params: FlowParams, // assumed static and same for every peer.
+	req_id: AtomicUsize,
+}
+
+impl LightProtocol {
+	/// Make an announcement of new chain head and capabilities to all peers.
+	/// The announcement is expected to be valid.
+	pub fn make_announcement(&self, mut announcement: Announcement, io: &NetworkContext) {
+		let mut reorgs_map = HashMap::new();
+
+		// calculate reorg info and send packets
+		for (peer_id, peer_info) in self.peers.write().iter_mut() {
+			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) {
+						Some(depth) => depth,
+						None => {
+							// both values will always originate locally -- this means something
+							// has gone really wrong
+							debug!(target: "les", "couldn't compute reorganization depth between {:?} and {:?}",
+								&announcement.head_hash, &peer_info.sent_head);
+							0
+						}
+					}
+				});
+
+			peer_info.sent_head = announcement.head_hash;
+			announcement.reorg_depth = *reorg_depth;
+
+			if let Err(e) = io.send(*peer_id, packet::ANNOUNCE, status::write_announcement(&announcement)) {
+				debug!(target: "les", "Error sending to peer {}: {}", peer_id, e);
+			}
+		}
+	}
+}
+
+impl LightProtocol {
+	// called when a peer connects.
+	fn on_connect(&self, peer: &PeerId, io: &NetworkContext) {
+		let peer = *peer;
+
+		match self.send_status(peer, io) {
+			Ok(pending_peer) => {
+				self.pending_peers.write().insert(peer, pending_peer);
+			}
+			Err(e) => {
+				trace!(target: "les", "Error while sending status: {}", e);
+				io.disconnect_peer(peer);
+			}
+		}
+	}
+
+	// called when a peer disconnects.
+	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);
+	}
+
+	// send status to a peer.
+	fn send_status(&self, peer: PeerId, io: &NetworkContext) -> Result<PendingPeer, NetworkError> {
+		let chain_info = self.provider.chain_info();
+
+		// TODO: could update capabilities here.
+
+		let status = Status {
+			head_td: chain_info.total_difficulty,
+			head_hash: chain_info.best_block_hash,
+			head_num: chain_info.best_block_number,
+			genesis_hash: chain_info.genesis_hash,
+			protocol_version: PROTOCOL_VERSION,
+			network_id: self.network_id,
+			last_head: None,
+		};
+
+		let capabilities = self.capabilities.read().clone();
+		let status_packet = status::write_handshake(&status, &capabilities, &self.flow_params);
+
+		try!(io.send(peer, packet::STATUS, status_packet));
+
+		Ok(PendingPeer {
+			sent_head: chain_info.best_block_hash,
+		})
+	}
+
+	// Handle status message from peer.
+	fn status(&self, peer: &PeerId, data: UntrustedRlp) -> Result<(), Error> {
+		let pending = match self.pending_peers.write().remove(peer) {
+			Some(pending) => pending,
+			None => {
+				return Err(Error::UnexpectedHandshake);
+			}
+		};
+
+		let (status, capabilities, flow_params) = try!(status::parse_handshake(data));
+
+		trace!(target: "les", "Connected peer with chain head {:?}", (status.head_hash, status.head_num));
+
+		if (status.network_id, status.genesis_hash) != (self.network_id, self.genesis_hash) {
+			return Err(Error::WrongNetwork);
+		}
+
+		self.peers.write().insert(*peer, Peer {
+			local_buffer: self.flow_params.create_buffer(),
+			remote_buffer: flow_params.create_buffer(),
+			current_asking: HashSet::new(),
+			status: status,
+			capabilities: capabilities,
+			remote_flow: flow_params,
+			sent_head: pending.sent_head,
+		});
+
+		Ok(())
+	}
+
+	// Handle an announcement.
+	fn announcement(&self, peer: &PeerId, data: UntrustedRlp) -> Result<(), Error> {
+		if !self.peers.read().contains_key(peer) {
+			debug!(target: "les", "Ignoring announcement from unknown peer");
+			return Ok(())
+		}
+
+		let announcement = try!(status::parse_announcement(data));
+		let mut peers = self.peers.write();
+
+		let peer_info = match peers.get_mut(peer) {
+			Some(info) => info,
+			None => return Ok(()),
+		};
+
+		// update status.
+		{
+			// TODO: punish peer if they've moved backwards.
+			let status = &mut peer_info.status;
+			let last_head = status.head_hash;
+			status.head_hash = announcement.head_hash;
+			status.head_td = announcement.head_td;
+			status.head_num = announcement.head_num;
+			status.last_head = Some((last_head, announcement.reorg_depth));
+		}
+
+		// update capabilities.
+		{
+			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.
+
+		Ok(())
+	}
+
+	// Handle a request for block headers.
+	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) {
+			Some(peer) => peer.local_buffer.clone(),
+			None => {
+				debug!(target: "les", "Ignoring announcement from unknown peer");
+				return Ok(())
+			}
+		};
+
+		self.flow_params.recharge(&mut present_buffer);
+		let req_id: u64 = try!(data.val_at(0));
+
+		let req = request::Headers {
+			block: {
+				let rlp = try!(data.at(1));
+				(try!(rlp.val_at(0)), try!(rlp.val_at(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);
+		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());
+
+		let cur_buffer = match self.peers.write().get_mut(peer) {
+			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);
+
+			for header in response {
+				stream.append_raw(&header, 1);
+			}
+
+			stream.out()
+		}).map_err(Into::into)
+	}
+
+	// Receive a response for block headers.
+	fn block_headers(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+		unimplemented!()
+	}
+
+	// Handle a request for block bodies.
+	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) {
+			Some(peer) => peer.local_buffer.clone(),
+			None => {
+				debug!(target: "les", "Ignoring announcement from unknown peer");
+				return Ok(())
+			}
+		};
+
+		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());
+		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);
+
+		let cur_buffer = match self.peers.write().get_mut(peer) {
+			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);
+			stream.append(&req_id).append(&cur_buffer);
+
+			for body in response {
+				stream.append_raw(&body, 1);
+			}
+
+			stream.out()
+		}).map_err(Into::into)
+	}
+
+	// Receive a response for block bodies.
+	fn block_bodies(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+		unimplemented!()
+	}
+
+	// Handle a request for receipts.
+	fn get_receipts(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+		unimplemented!()
+	}
+
+	// Receive a response for receipts.
+	fn receipts(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+		unimplemented!()
+	}
+
+	// Handle a request for proofs.
+	fn get_proofs(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+		unimplemented!()
+	}
+
+	// Receive a response for proofs.
+	fn proofs(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+		unimplemented!()
+	}
+
+	// Handle a request for contract code.
+	fn get_contract_code(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+		unimplemented!()
+	}
+
+	// Receive a response for contract code.
+	fn contract_code(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+		unimplemented!()
+	}
+
+	// Handle a request for header proofs
+	fn get_header_proofs(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+		unimplemented!()
+	}
+
+	// Receive a response for header proofs
+	fn header_proofs(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+		unimplemented!()
+	}
+
+	// Receive a set of transactions to relay.
+	fn relay_transactions(&self, _: &PeerId, _: &NetworkContext, _: UntrustedRlp) -> Result<(), Error> {
+		unimplemented!()
+	}
+}
+
+impl NetworkProtocolHandler for LightProtocol {
+	fn initialize(&self, io: &NetworkContext) {
+		io.register_timer(TIMEOUT, TIMEOUT_INTERVAL_MS).expect("Error registering sync timer.");
+	}
+
+	fn read(&self, io: &NetworkContext, peer: &PeerId, packet_id: u8, data: &[u8]) {
+		let rlp = UntrustedRlp::new(data);
+
+		// handle the packet
+		let res = match packet_id {
+			packet::STATUS => self.status(peer, rlp),
+			packet::ANNOUNCE => self.announcement(peer, rlp),
+
+			packet::GET_BLOCK_HEADERS => self.get_block_headers(peer, io, rlp),
+			packet::BLOCK_HEADERS => self.block_headers(peer, io, rlp),
+
+			packet::GET_BLOCK_BODIES => self.get_block_bodies(peer, io, rlp),
+			packet::BLOCK_BODIES => self.block_bodies(peer, io, rlp),
+
+			packet::GET_RECEIPTS => self.get_receipts(peer, io, rlp),
+			packet::RECEIPTS => self.receipts(peer, io, rlp),
+
+			packet::GET_PROOFS => self.get_proofs(peer, io, rlp),
+			packet::PROOFS => self.proofs(peer, io, rlp),
+
+			packet::GET_CONTRACT_CODES => self.get_contract_code(peer, io, rlp),
+			packet::CONTRACT_CODES => self.contract_code(peer, io, rlp),
+
+			packet::GET_HEADER_PROOFS => self.get_header_proofs(peer, io, rlp),
+			packet::HEADER_PROOFS => self.header_proofs(peer, io, rlp),
+
+			packet::SEND_TRANSACTIONS => self.relay_transactions(peer, io, rlp),
+
+			other => {
+				Err(Error::UnrecognizedPacket(other))
+			}
+		};
+
+		// if something went wrong, figure out how much to punish the peer.
+		if let Err(e) = res {
+			match e.punishment() {
+				Punishment::None => {}
+				Punishment::Disconnect => {
+					debug!(target: "les", "Disconnecting peer {}: {}", peer, e);
+					io.disconnect_peer(*peer)
+				}
+				Punishment::Disable => {
+					debug!(target: "les", "Disabling peer {}: {}", peer, e);
+					io.disable_peer(*peer)
+				}
+			}
+		}
+	}
+
+	fn connected(&self, io: &NetworkContext, peer: &PeerId) {
+		self.on_connect(peer, io);
+	}
+
+	fn disconnected(&self, _io: &NetworkContext, peer: &PeerId) {
+		self.on_disconnect(*peer);
+	}
+
+	fn timeout(&self, _io: &NetworkContext, timer: TimerToken) {
+		match timer {
+			TIMEOUT => {
+				// broadcast transactions to peers.
+			}
+			_ => warn!(target: "les", "received timeout on unknown token {}", timer),
+		}
+	}
+}

ethcore/light/src/net/status.rs

@@ -0,0 +1,539 @@
+// 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/>.
+
+//! Peer status and capabilities.
+
+use rlp::{DecoderError, RlpDecodable, RlpEncodable, RlpStream, Stream, UntrustedRlp, View};
+use util::{H256, U256};
+
+use super::buffer_flow::FlowParams;
+
+// recognized handshake/announcement keys.
+// unknown keys are to be skipped, known keys have a defined order.
+// their string values are defined in the LES spec.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Ord, PartialOrd)]
+enum Key {
+	ProtocolVersion,
+	NetworkId,
+	HeadTD,
+	HeadHash,
+	HeadNum,
+	GenesisHash,
+	ServeHeaders,
+	ServeChainSince,
+	ServeStateSince,
+	TxRelay,
+	BufferLimit,
+	BufferCostTable,
+	BufferRechargeRate,
+}
+
+impl Key {
+	// get the string value of this key.
+	fn as_str(&self) -> &'static str {
+		match *self {
+			Key::ProtocolVersion => "protocolVersion",
+			Key::NetworkId => "networkId",
+			Key::HeadTD => "headTd",
+			Key::HeadHash => "headHash",
+			Key::HeadNum => "headNum",
+			Key::GenesisHash => "genesisHash",
+			Key::ServeHeaders => "serveHeaders",
+			Key::ServeChainSince => "serveChainSince",
+			Key::ServeStateSince => "serveStateSince",
+			Key::TxRelay => "txRelay",
+			Key::BufferLimit => "flowControl/BL",
+			Key::BufferCostTable => "flowControl/MRC",
+			Key::BufferRechargeRate => "flowControl/MRR",
+		}
+	}
+
+	// try to parse the key value from a string.
+	fn from_str(s: &str) -> Option<Self> {
+		match s {
+			"protocolVersion" => Some(Key::ProtocolVersion),
+			"networkId" => Some(Key::NetworkId),
+			"headTd" => Some(Key::HeadTD),
+			"headHash" => Some(Key::HeadHash),
+			"headNum" => Some(Key::HeadNum),
+			"genesisHash" => Some(Key::GenesisHash),
+			"serveHeaders" => Some(Key::ServeHeaders),
+			"serveChainSince" => Some(Key::ServeChainSince),
+			"serveStateSince" => Some(Key::ServeStateSince),
+			"txRelay" => Some(Key::TxRelay),
+			"flowControl/BL" => Some(Key::BufferLimit),
+			"flowControl/MRC" => Some(Key::BufferCostTable),
+			"flowControl/MRR" => Some(Key::BufferRechargeRate),
+			_ => None
+		}
+	}
+}
+
+/// Network ID structure.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[repr(u32)]
+pub enum NetworkId {
+	/// ID for the mainnet
+	Mainnet = 1,
+	/// ID for the testnet
+	Testnet = 0,
+}
+
+impl NetworkId {
+	fn from_raw(raw: u32) -> Option<Self> {
+		match raw {
+			0 => Some(NetworkId::Testnet),
+			1 => Some(NetworkId::Mainnet),
+			_ => None,
+		}
+	}
+}
+
+// helper for decoding key-value pairs in the handshake or an announcement.
+struct Parser<'a> {
+	pos: usize,
+	rlp: UntrustedRlp<'a>,
+}
+
+impl<'a> Parser<'a> {
+	// expect a specific next key, and decode the value.
+	// error on unexpected key or invalid value.
+	fn expect<T: RlpDecodable>(&mut self, key: Key) -> Result<T, DecoderError> {
+		self.expect_raw(key).and_then(|item| item.as_val())
+	}
+
+	// expect a specific next key, and get the value's RLP.
+	// if the key isn't found, the position isn't advanced.
+	fn expect_raw(&mut self, key: Key) -> Result<UntrustedRlp<'a>, DecoderError> {
+		let pre_pos = self.pos;
+		if let Some((k, val)) = try!(self.get_next()) {
+			if k == key { return Ok(val) }
+		}
+
+		self.pos = pre_pos;
+		Err(DecoderError::Custom("Missing expected key"))
+	}
+
+	// get the next key and value RLP.
+	fn get_next(&mut self) -> Result<Option<(Key, UntrustedRlp<'a>)>, DecoderError> {
+		while self.pos < self.rlp.item_count() {
+			let pair = try!(self.rlp.at(self.pos));
+			let k: String = try!(pair.val_at(0));
+
+			self.pos += 1;
+			match Key::from_str(&k) {
+				Some(key) => return Ok(Some((key , try!(pair.at(1))))),
+				None => continue,
+			}
+		}
+
+		Ok(None)
+	}
+}
+
+// Helper for encoding a key-value pair
+fn encode_pair<T: RlpEncodable>(key: Key, val: &T) -> Vec<u8> {
+	let mut s = RlpStream::new_list(2);
+	s.append(&key.as_str()).append(val);
+	s.out()
+}
+
+// Helper for encoding a flag.
+fn encode_flag(key: Key) -> Vec<u8> {
+	let mut s = RlpStream::new_list(2);
+	s.append(&key.as_str()).append_empty_data();
+	s.out()
+}
+
+/// A peer status message.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Status {
+	/// Protocol version.
+	pub protocol_version: u32,
+	/// Network id of this peer.
+	pub network_id: NetworkId,
+	/// Total difficulty of the head of the chain.
+	pub head_td: U256,
+	/// Hash of the best block.
+	pub head_hash: H256,
+	/// Number of the best block.
+	pub head_num: u64,
+	/// Genesis hash
+	pub genesis_hash: H256,
+	/// Last announced chain head and reorg depth to common ancestor.
+	pub last_head: Option<(H256, u64)>,
+}
+
+/// Peer capabilities.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Capabilities {
+	/// Whether this peer can serve headers
+	pub serve_headers: bool,
+	/// Earliest block number it can serve block/receipt requests for.
+	pub serve_chain_since: Option<u64>,
+	/// Earliest block number it can serve state requests for.
+	pub serve_state_since: Option<u64>,
+	/// Whether it can relay transactions to the eth network.
+	pub tx_relay: bool,
+}
+
+impl Default for Capabilities {
+	fn default() -> Self {
+		Capabilities {
+			serve_headers: true,
+			serve_chain_since: None,
+			serve_state_since: None,
+			tx_relay: false,
+		}
+	}
+}
+
+/// Attempt to parse a handshake message into its three parts:
+///   - chain status
+///   - serving capabilities
+///   - buffer flow parameters
+pub fn parse_handshake(rlp: UntrustedRlp) -> Result<(Status, Capabilities, FlowParams), DecoderError> {
+	let mut parser = Parser {
+		pos: 0,
+		rlp: rlp,
+	};
+
+	let status = Status {
+		protocol_version: try!(parser.expect(Key::ProtocolVersion)),
+		network_id: try!(parser.expect(Key::NetworkId)
+			.and_then(|id: u32| NetworkId::from_raw(id).ok_or(DecoderError::Custom("Invalid network ID")))),
+		head_td: try!(parser.expect(Key::HeadTD)),
+		head_hash: try!(parser.expect(Key::HeadHash)),
+		head_num: try!(parser.expect(Key::HeadNum)),
+		genesis_hash: try!(parser.expect(Key::GenesisHash)),
+		last_head: None,
+	};
+
+	let capabilities = Capabilities {
+		serve_headers: parser.expect_raw(Key::ServeHeaders).is_ok(),
+		serve_chain_since: parser.expect(Key::ServeChainSince).ok(),
+		serve_state_since: parser.expect(Key::ServeStateSince).ok(),
+		tx_relay: parser.expect_raw(Key::TxRelay).is_ok(),
+	};
+
+	let flow_params = FlowParams::new(
+		try!(parser.expect(Key::BufferLimit)),
+		try!(parser.expect(Key::BufferCostTable)),
+		try!(parser.expect(Key::BufferRechargeRate)),
+	);
+
+	Ok((status, capabilities, flow_params))
+}
+
+/// Write a handshake, given status, capabilities, and flow parameters.
+pub fn write_handshake(status: &Status, capabilities: &Capabilities, flow_params: &FlowParams) -> Vec<u8> {
+	let mut pairs = Vec::new();
+	pairs.push(encode_pair(Key::ProtocolVersion, &status.protocol_version));
+	pairs.push(encode_pair(Key::NetworkId, &(status.network_id as u32)));
+	pairs.push(encode_pair(Key::HeadTD, &status.head_td));
+	pairs.push(encode_pair(Key::HeadHash, &status.head_hash));
+	pairs.push(encode_pair(Key::HeadNum, &status.head_num));
+	pairs.push(encode_pair(Key::GenesisHash, &status.genesis_hash));
+
+	if capabilities.serve_headers {
+		pairs.push(encode_flag(Key::ServeHeaders));
+	}
+	if let Some(ref serve_chain_since) = capabilities.serve_chain_since {
+		pairs.push(encode_pair(Key::ServeChainSince, serve_chain_since));
+	}
+	if let Some(ref serve_state_since) = capabilities.serve_state_since {
+		pairs.push(encode_pair(Key::ServeStateSince, serve_state_since));
+	}
+	if capabilities.tx_relay {
+		pairs.push(encode_flag(Key::TxRelay));
+	}
+
+	pairs.push(encode_pair(Key::BufferLimit, flow_params.limit()));
+	pairs.push(encode_pair(Key::BufferCostTable, flow_params.cost_table()));
+	pairs.push(encode_pair(Key::BufferRechargeRate, flow_params.recharge_rate()));
+
+	let mut stream = RlpStream::new_list(pairs.len());
+
+	for pair in pairs {
+		stream.append_raw(&pair, 1);
+	}
+
+	stream.out()
+}
+
+/// An announcement of new chain head or capabilities made by a peer.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Announcement {
+	/// Hash of the best block.
+	pub head_hash: H256,
+	/// Number of the best block.
+	pub head_num: u64,
+	/// Head total difficulty
+	pub head_td: U256,
+	/// reorg depth to common ancestor of last announced head.
+	pub reorg_depth: u64,
+	/// optional new header-serving capability. false means "no change"
+	pub serve_headers: bool,
+	/// optional new state-serving capability
+	pub serve_state_since: Option<u64>,
+	/// optional new chain-serving capability
+	pub serve_chain_since: Option<u64>,
+	/// optional new transaction-relay capability. false means "no change"
+	pub tx_relay: bool,
+	// TODO: changes in buffer flow?
+}
+
+/// Parse an announcement.
+pub fn parse_announcement(rlp: UntrustedRlp) -> Result<Announcement, DecoderError> {
+	let mut last_key = None;
+
+	let mut announcement = Announcement {
+		head_hash: try!(rlp.val_at(0)),
+		head_num: try!(rlp.val_at(1)),
+		head_td: try!(rlp.val_at(2)),
+		reorg_depth: try!(rlp.val_at(3)),
+		serve_headers: false,
+		serve_state_since: None,
+		serve_chain_since: None,
+		tx_relay: false,
+	};
+
+	let mut parser = Parser {
+		pos: 4,
+		rlp: rlp,
+	};
+
+	while let Some((key, item)) = try!(parser.get_next()) {
+		if Some(key) <= last_key { return Err(DecoderError::Custom("Invalid announcement key ordering")) }
+		last_key = Some(key);
+
+		match key {
+			Key::ServeHeaders => announcement.serve_headers = true,
+			Key::ServeStateSince => announcement.serve_state_since = Some(try!(item.as_val())),
+			Key::ServeChainSince => announcement.serve_chain_since = Some(try!(item.as_val())),
+			Key::TxRelay => announcement.tx_relay = true,
+			_ => return Err(DecoderError::Custom("Nonsensical key in announcement")),
+		}
+	}
+
+	Ok(announcement)
+}
+
+/// Write an announcement out.
+pub fn write_announcement(announcement: &Announcement) -> Vec<u8> {
+	let mut pairs = Vec::new();
+	if announcement.serve_headers {
+		pairs.push(encode_flag(Key::ServeHeaders));
+	}
+	if let Some(ref serve_chain_since) = announcement.serve_chain_since {
+		pairs.push(encode_pair(Key::ServeChainSince, serve_chain_since));
+	}
+	if let Some(ref serve_state_since) = announcement.serve_state_since {
+		pairs.push(encode_pair(Key::ServeStateSince, serve_state_since));
+	}
+	if announcement.tx_relay {
+		pairs.push(encode_flag(Key::TxRelay));
+	}
+
+	let mut stream = RlpStream::new_list(4 + pairs.len());
+	stream
+		.append(&announcement.head_hash)
+		.append(&announcement.head_num)
+		.append(&announcement.head_td)
+		.append(&announcement.reorg_depth);
+
+	for item in pairs {
+		stream.append_raw(&item, 1);
+	}
+
+	stream.out()
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+	use super::super::buffer_flow::FlowParams;
+	use util::{U256, H256, FixedHash};
+	use rlp::{RlpStream, Stream ,UntrustedRlp, View};
+
+	#[test]
+	fn full_handshake() {
+		let status = Status {
+			protocol_version: 1,
+			network_id: NetworkId::Mainnet,
+			head_td: U256::default(),
+			head_hash: H256::default(),
+			head_num: 10,
+			genesis_hash: H256::zero(),
+			last_head: None,
+		};
+
+		let capabilities = Capabilities {
+			serve_headers: true,
+			serve_chain_since: Some(5),
+			serve_state_since: Some(8),
+			tx_relay: true,
+		};
+
+		let flow_params = FlowParams::new(
+			1_000_000.into(),
+			Default::default(),
+			1000.into(),
+		);
+
+		let handshake = write_handshake(&status, &capabilities, &flow_params);
+
+		let (read_status, read_capabilities, read_flow)
+			= parse_handshake(UntrustedRlp::new(&handshake)).unwrap();
+
+		assert_eq!(read_status, status);
+		assert_eq!(read_capabilities, capabilities);
+		assert_eq!(read_flow, flow_params);
+	}
+
+	#[test]
+	fn partial_handshake() {
+		let status = Status {
+			protocol_version: 1,
+			network_id: NetworkId::Mainnet,
+			head_td: U256::default(),
+			head_hash: H256::default(),
+			head_num: 10,
+			genesis_hash: H256::zero(),
+			last_head: None,
+		};
+
+		let capabilities = Capabilities {
+			serve_headers: false,
+			serve_chain_since: Some(5),
+			serve_state_since: None,
+			tx_relay: true,
+		};
+
+		let flow_params = FlowParams::new(
+			1_000_000.into(),
+			Default::default(),
+			1000.into(),
+		);
+
+		let handshake = write_handshake(&status, &capabilities, &flow_params);
+
+		let (read_status, read_capabilities, read_flow)
+			= parse_handshake(UntrustedRlp::new(&handshake)).unwrap();
+
+		assert_eq!(read_status, status);
+		assert_eq!(read_capabilities, capabilities);
+		assert_eq!(read_flow, flow_params);
+	}
+
+	#[test]
+	fn skip_unknown_keys() {
+		let status = Status {
+			protocol_version: 1,
+			network_id: NetworkId::Mainnet,
+			head_td: U256::default(),
+			head_hash: H256::default(),
+			head_num: 10,
+			genesis_hash: H256::zero(),
+			last_head: None,
+		};
+
+		let capabilities = Capabilities {
+			serve_headers: false,
+			serve_chain_since: Some(5),
+			serve_state_since: None,
+			tx_relay: true,
+		};
+
+		let flow_params = FlowParams::new(
+			1_000_000.into(),
+			Default::default(),
+			1000.into(),
+		);
+
+		let handshake = write_handshake(&status, &capabilities, &flow_params);
+		let interleaved = {
+			let handshake = UntrustedRlp::new(&handshake);
+			let mut stream = RlpStream::new_list(handshake.item_count() * 3);
+
+			for item in handshake.iter() {
+				stream.append_raw(item.as_raw(), 1);
+				let (mut s1, mut s2) = (RlpStream::new_list(2), RlpStream::new_list(2));
+				s1.append(&"foo").append_empty_data();
+				s2.append(&"bar").append_empty_data();
+				stream.append_raw(&s1.out(), 1);
+				stream.append_raw(&s2.out(), 1);
+			}
+
+			stream.out()
+		};
+
+		let (read_status, read_capabilities, read_flow)
+			= parse_handshake(UntrustedRlp::new(&interleaved)).unwrap();
+
+		assert_eq!(read_status, status);
+		assert_eq!(read_capabilities, capabilities);
+		assert_eq!(read_flow, flow_params);
+	}
+
+	#[test]
+	fn announcement_roundtrip() {
+		let announcement = Announcement {
+			head_hash: H256::random(),
+			head_num: 100_000,
+			head_td: 1_000_000.into(),
+			reorg_depth: 4,
+			serve_headers: false,
+			serve_state_since: Some(99_000),
+			serve_chain_since: Some(1),
+			tx_relay: true,
+		};
+
+		let serialized = write_announcement(&announcement);
+		let read = parse_announcement(UntrustedRlp::new(&serialized)).unwrap();
+
+		assert_eq!(read, announcement);
+	}
+
+	#[test]
+	fn keys_out_of_order() {
+		use super::{Key, encode_pair, encode_flag};
+
+		let mut stream = RlpStream::new_list(6);
+		stream
+			.append(&H256::zero())
+			.append(&10u64)
+			.append(&100_000u64)
+			.append(&2u64)
+			.append_raw(&encode_pair(Key::ServeStateSince, &44u64), 1)
+			.append_raw(&encode_flag(Key::ServeHeaders), 1);
+
+		let out = stream.drain();
+		assert!(parse_announcement(UntrustedRlp::new(&out)).is_err());
+
+		let mut stream = RlpStream::new_list(6);
+		stream
+			.append(&H256::zero())
+			.append(&10u64)
+			.append(&100_000u64)
+			.append(&2u64)
+			.append_raw(&encode_flag(Key::ServeHeaders), 1)
+			.append_raw(&encode_pair(Key::ServeStateSince, &44u64), 1);
+
+		let out = stream.drain();
+		assert!(parse_announcement(UntrustedRlp::new(&out)).is_ok());
+	}
+}

ethcore/light/src/provider.rs

@@ -0,0 +1,71 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! 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 util::{Bytes, H256};
+
+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.
+///
+/// [1]: https://github.com/ethcore/parity/wiki/Light-Ethereum-Subprotocol-(LES)
+pub trait Provider: Send + Sync {
+	/// Provide current blockchain info.
+	fn chain_info(&self) -> BlockChainInfo;
+
+	/// Find the depth of a common ancestor between two blocks.
+	fn reorg_depth(&self, a: &H256, b: &H256) -> Option<u64>;
+
+	/// Earliest state.
+	fn earliest_state(&self) -> Option<u64>;
+
+	/// Provide a list of headers starting at the requested block,
+	/// possibly in reverse and skipping `skip` at a time.
+	///
+	/// The returned vector may have any length in the range [0, `max`], but the
+	/// results within must adhere to the `skip` and `reverse` parameters.
+	fn block_headers(&self, req: request::Headers) -> Vec<Bytes>;
+
+	/// Provide as many as possible of the requested blocks (minus the headers) encoded
+	/// in RLP format.
+	fn block_bodies(&self, req: request::Bodies) -> Vec<Bytes>;
+
+	/// Provide the receipts as many as possible of the requested blocks.
+	/// Returns a vector of RLP-encoded lists of receipts.
+	fn receipts(&self, req: request::Receipts) -> Vec<Bytes>;
+
+	/// 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.
+	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>;
+
+	/// Provide header proofs from the Canonical Hash Tries.
+	fn header_proofs(&self, req: request::HeaderProofs) -> Vec<Bytes>;
+
+	/// Provide pending transactions.
+	fn pending_transactions(&self) -> Vec<SignedTransaction>;
+}

ethcore/light/src/request.rs

@@ -0,0 +1,145 @@
+// 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/>.
+
+//! LES request types.
+
+// TODO: make IPC compatible.
+
+use util::H256;
+
+/// A request for block headers.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Headers {
+	/// Block information for the request being made.
+	pub block: (u64, 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,
+	/// 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)]
+pub struct Bodies {
+	/// Hashes which bodies are being requested for.
+	pub block_hashes: Vec<H256>
+}
+
+/// A request for transaction receipts.
+///
+/// This request is answered with a list of transaction receipts for each block
+/// requested.
+#[derive(Debug, Clone, PartialEq, Eq)]
+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)]
+pub struct StateProof {
+	/// Block hash to query state from.
+	pub block: H256,
+	/// Key of the state trie -- corresponds to account hash.
+	pub key1: H256,
+	/// Key in that account's storage trie; if empty, then the account RLP should be
+	/// returned.
+	pub key2: Option<H256>,
+	/// if greater than zero, trie nodes beyond this level may be omitted.
+	pub from_level: u32, // could even safely be u8; trie w/ 32-byte key can be at most 64-levels deep.
+}
+
+/// A request for state proofs.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct StateProofs {
+	/// All the proof requests.
+	pub requests: Vec<StateProof>,
+}
+
+/// A request for contract code.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct ContractCodes {
+	/// Block hash and account key (== sha3(address)) pairs to fetch code for.
+	pub code_requests: Vec<(H256, H256)>,
+}
+
+/// A request for a header proof from the Canonical Hash Trie.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct HeaderProof {
+	/// Number of the CHT.
+	pub cht_number: u64,
+	/// Block number requested.
+	pub block_number: u64,
+	/// If greater than zero, trie nodes beyond this level may be omitted.
+	pub from_level: u32,
+}
+
+/// A request for header proofs from the CHT.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct HeaderProofs {
+	/// All the proof requests.
+	pub requests: Vec<HeaderProofs>,
+}
+
+/// Kinds of requests.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum Kind {
+	/// Requesting headers.
+	Headers,
+	/// Requesting block bodies.
+	Bodies,
+	/// Requesting transaction receipts.
+	Receipts,
+	/// Requesting proofs of state trie nodes.
+	StateProofs,
+	/// Requesting contract code by hash.
+	Codes,
+	/// Requesting header proofs (from the CHT).
+	HeaderProofs,
+}
+
+/// Encompasses all possible types of requests in a single structure.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum Request {
+	/// Requesting headers.
+	Headers(Headers),
+	/// Requesting block bodies.
+	Bodies(Bodies),
+	/// Requesting transaction receipts.
+	Receipts(Receipts),
+	/// Requesting state proofs.
+	StateProofs(StateProofs),
+	/// Requesting contract codes.
+	Codes(ContractCodes),
+	/// Requesting header proofs.
+	HeaderProofs(HeaderProofs),
+}
+
+impl Request {
+	/// Get the kind of request this is.
+	pub fn kind(&self) -> Kind {
+		match *self {
+			Request::Headers(_) => Kind::Headers,
+			Request::Bodies(_) => Kind::Bodies,
+			Request::Receipts(_) => Kind::Receipts,
+			Request::StateProofs(_) => Kind::StateProofs,
+			Request::Codes(_) => Kind::Codes,
+			Request::HeaderProofs(_) => Kind::HeaderProofs,
+		}
+	}
+}

ethcore/res/ethereum/frontier.json

@@ -131,10 +131,10 @@
 					"0x807640a13483f8ac783c557fcdf27be11ea4ac7a"
 				],
 				"eip150Transition": "0x259518",
-				"eip155Transition": 2642462,
+				"eip155Transition": "0x7fffffffffffffff",
-				"eip160Transition": 2642462,
+				"eip160Transition": "0x7fffffffffffffff",
-				"eip161abcTransition": 2642462,
+				"eip161abcTransition": "0x7fffffffffffffff",
-				"eip161dTransition": 2642462
+				"eip161dTransition": "0x7fffffffffffffff"
 			}
 		}
 	},
@@ -176,7 +176,13 @@
 		"enode://a979fb575495b8d6db44f750317d0f4622bf4c2aa3365d6af7c284339968eef29b69ad0dce72a4d8db5ebb4968de0e3bec910127f134779fbcb0cb6d3331163c@52.16.188.185:30303",
 		"enode://de471bccee3d042261d52e9bff31458daecc406142b401d4cd848f677479f73104b9fdeb090af9583d3391b7f10cb2ba9e26865dd5fca4fcdc0fb1e3b723c786@54.94.239.50:30303",
 		"enode://1118980bf48b0a3640bdba04e0fe78b1add18e1cd99bf22d53daac1fd9972ad650df52176e7c7d89d1114cfef2bc23a2959aa54998a46afcf7d91809f0855082@52.74.57.123:30303",
-		"enode://4cd540b2c3292e17cff39922e864094bf8b0741fcc8c5dcea14957e389d7944c70278d872902e3d0345927f621547efa659013c400865485ab4bfa0c6596936f@138.201.144.135:30303"
+		"enode://4cd540b2c3292e17cff39922e864094bf8b0741fcc8c5dcea14957e389d7944c70278d872902e3d0345927f621547efa659013c400865485ab4bfa0c6596936f@138.201.144.135:30303",
+
+		"enode://89d5dc2a81e574c19d0465f497c1af96732d1b61a41de89c2a37f35707689ac416529fae1038809852b235c2d30fd325abdc57c122feeefbeaaf802cc7e9580d@45.55.33.62:30303",
+		"enode://605e04a43b1156966b3a3b66b980c87b7f18522f7f712035f84576016be909a2798a438b2b17b1a8c58db314d88539a77419ca4be36148c086900fba487c9d39@188.166.255.12:30303",
+		"enode://016b20125f447a3b203a3cae953b2ede8ffe51290c071e7599294be84317635730c397b8ff74404d6be412d539ee5bb5c3c700618723d3b53958c92bd33eaa82@159.203.210.80:30303",
+		"enode://01f76fa0561eca2b9a7e224378dd854278735f1449793c46ad0c4e79e8775d080c21dcc455be391e90a98153c3b05dcc8935c8440de7b56fe6d67251e33f4e3c@10.6.6.117:30303",
+		"enode://fe11ef89fc5ac9da358fc160857855f25bbf9e332c79b9ca7089330c02b728b2349988c6062f10982041702110745e203d26975a6b34bcc97144f9fe439034e8@10.1.72.117:30303"
 	],
 	"accounts": {
 		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },

ethcore/res/ethereum/tests

@@ -1 +1 @@
-Subproject commit 853333e7da312775fb8f32f2c2771b8578cd0d79
+Subproject commit 9028c4801fd39fbb71a9796979182549a24e81c8

ethcore/src/account_provider.rs

@@ -95,6 +95,7 @@ impl KeyDirectory for NullDir {
 struct AddressBook {
 	path: PathBuf,
 	cache: HashMap<Address, AccountMeta>,
+	transient: bool,
 }
 
 impl AddressBook {
@@ -106,11 +107,18 @@ impl AddressBook {
 		let mut r = AddressBook {
 			path: path,
 			cache: HashMap::new(),
+			transient: false,
 		};
 		r.revert();
 		r
 	}
 
+	pub fn transient() -> Self {
+		let mut book = AddressBook::new(Default::default());
+		book.transient = true;
+		book
+	}
+
 	pub fn get(&self) -> HashMap<Address, AccountMeta> {
 		self.cache.clone()
 	}
@@ -134,6 +142,7 @@ impl AddressBook {
 	}
 
 	fn revert(&mut self) {
+		if self.transient { return; }
 		trace!(target: "addressbook", "revert");
 		let _ = fs::File::open(self.path.clone())
 			.map_err(|e| trace!(target: "addressbook", "Couldn't open address book: {}", e))
@@ -144,6 +153,7 @@ impl AddressBook {
 	}
 
 	fn save(&mut self) {
+		if self.transient { return; }
 		trace!(target: "addressbook", "save");
 		let _ = fs::File::create(self.path.clone())
 			.map_err(|e| warn!(target: "addressbook", "Couldn't open address book for writing: {}", e))
@@ -175,7 +185,7 @@ impl AccountProvider {
 	pub fn transient_provider() -> Self {
 		AccountProvider {
 			unlocked: Mutex::new(HashMap::new()),
-			address_book: Mutex::new(AddressBook::new(Default::default())),
+			address_book: Mutex::new(AddressBook::transient()),
 			sstore: Box::new(EthStore::open(Box::new(NullDir::default()))
 				.expect("NullDir load always succeeds; qed"))
 		}

ethcore/src/client/client.rs

@@ -1232,8 +1232,7 @@ impl BlockChainClient for Client {
 
 	fn uncle_extra_info(&self, id: UncleID) -> Option<BTreeMap<String, String>> {
 		self.uncle(id)
-			.map(|block| BlockView::new(&block).header())
+			.map(|header| self.engine.extra_info(&decode(&header)))
-			.map(|header| self.engine.extra_info(&header))
 	}
 }
 

ethcore/src/json_tests/transaction.rs

@@ -26,8 +26,7 @@ fn do_json_test(json_data: &[u8]) -> Vec<String> {
 	let old_schedule = evm::Schedule::new_frontier();
 	let new_schedule = evm::Schedule::new_homestead();
 	for (name, test) in tests.into_iter() {
-		let mut fail = false;
+		let mut fail_unless = |cond: bool, title: &str| if !cond { failed.push(name.clone()); println!("Transaction failed: {:?}: {:?}", name, title); };
-		let mut fail_unless = |cond: bool| if !cond && !fail { failed.push(name.clone()); println!("Transaction failed: {:?}", name); fail = true };
 
 		let number: Option<u64> = test.block_number.map(Into::into);
 		let schedule = match number {
@@ -35,7 +34,7 @@ fn do_json_test(json_data: &[u8]) -> Vec<String> {
 			Some(x) if x < 1_150_000 => &old_schedule,
 			Some(_) => &new_schedule
 		};
-		let allow_network_id_of_one = number.map_or(false, |n| n > 2600000); 
+		let allow_network_id_of_one = number.map_or(false, |n| n >= 3_500_000); 
 
 		let rlp: Vec<u8> = test.rlp.into();
 		let res = UntrustedRlp::new(&rlp)
@@ -43,26 +42,26 @@ fn do_json_test(json_data: &[u8]) -> Vec<String> {
 			.map_err(From::from)
 			.and_then(|t: SignedTransaction| t.validate(schedule, schedule.have_delegate_call, allow_network_id_of_one));
 
-		fail_unless(test.transaction.is_none() == res.is_err());
+		fail_unless(test.transaction.is_none() == res.is_err(), "Validity different");
 		if let (Some(tx), Some(sender)) = (test.transaction, test.sender) {
 			let t = res.unwrap();
-			fail_unless(t.sender().unwrap() == sender.into());
+			fail_unless(t.sender().unwrap() == sender.into(), "sender mismatch");
 			let is_acceptable_network_id = match t.network_id() {
 				None => true,
 				Some(1) if allow_network_id_of_one => true,
 				_ => false,
 			};
-			fail_unless(is_acceptable_network_id);
+			fail_unless(is_acceptable_network_id, "Network ID unacceptable");
 			let data: Vec<u8> = tx.data.into();
-			fail_unless(t.data == data);
+			fail_unless(t.data == data, "data mismatch");
-			fail_unless(t.gas_price == tx.gas_price.into());
+			fail_unless(t.gas_price == tx.gas_price.into(), "gas_price mismatch");
-			fail_unless(t.nonce == tx.nonce.into());
+			fail_unless(t.nonce == tx.nonce.into(), "nonce mismatch");
-			fail_unless(t.value == tx.value.into());
+			fail_unless(t.value == tx.value.into(), "value mismatch");
 			let to: Option<ethjson::hash::Address> = tx.to.into();
 			let to: Option<Address> = to.map(Into::into);
 			match t.action {
-				Action::Call(dest) => fail_unless(Some(dest) == to),
+				Action::Call(dest) => fail_unless(Some(dest) == to, "call/destination mismatch"),
-				Action::Create => fail_unless(None == to),
+				Action::Create => fail_unless(None == to, "create mismatch"),
 			}
 		}
 	}
@@ -80,3 +79,7 @@ declare_test!{TransactionTests_Homestead_ttTransactionTest, "TransactionTests/Ho
 declare_test!{heavy => TransactionTests_Homestead_tt10mbDataField, "TransactionTests/Homestead/tt10mbDataField"}
 declare_test!{TransactionTests_Homestead_ttWrongRLPTransaction, "TransactionTests/Homestead/ttWrongRLPTransaction"}
 declare_test!{TransactionTests_RandomTests_tr201506052141PYTHON, "TransactionTests/RandomTests/tr201506052141PYTHON"}
+declare_test!{TransactionTests_Homestead_ttTransactionTestEip155VitaliksTests, "TransactionTests/Homestead/ttTransactionTestEip155VitaliksTests"}
+declare_test!{TransactionTests_EIP155_ttTransactionTest, "TransactionTests/EIP155/ttTransactionTest"}
+declare_test!{TransactionTests_EIP155_ttTransactionTestEip155VitaliksTests, "TransactionTests/EIP155/ttTransactionTestEip155VitaliksTests"}
+declare_test!{TransactionTests_EIP155_ttTransactionTestVRule, "TransactionTests/EIP155/ttTransactionTestVRule"}

ethcore/src/lib.rs

@@ -137,6 +137,7 @@ pub mod miner;
 pub mod snapshot;
 pub mod action_params;
 pub mod db;
+pub mod verification;
 #[macro_use] pub mod evm;
 
 mod cache_manager;
@@ -150,7 +151,6 @@ mod account_db;
 mod builtin;
 mod executive;
 mod externalities;
-mod verification;
 mod blockchain;
 mod types;
 mod factory;

ethcore/src/pod_account.rs

@@ -89,7 +89,7 @@ impl From<ethjson::blockchain::Account> for PodAccount {
 				let key: U256 = key.into();
 				let value: U256 = value.into();
 				(H256::from(key), H256::from(value))
-			}).collect()
+			}).collect(),
 		}
 	}
 }
@@ -99,8 +99,12 @@ impl From<ethjson::spec::Account> for PodAccount {
 		PodAccount {
 			balance: a.balance.map_or_else(U256::zero, Into::into),
 			nonce: a.nonce.map_or_else(U256::zero, Into::into),
-			code: a.code.map(Into::into).or_else(|| Some(Vec::new())),
+			code: Some(a.code.map_or_else(Vec::new, Into::into)),
-			storage: BTreeMap::new()
+			storage: a.storage.map_or_else(BTreeMap::new, |s| s.into_iter().map(|(key, value)| {
+				let key: U256 = key.into();
+				let value: U256 = value.into();
+				(H256::from(key), H256::from(value))
+			}).collect()),
 		}
 	}
 }
@@ -112,7 +116,7 @@ impl fmt::Display for PodAccount {
 			self.nonce,
 			self.code.as_ref().map_or(0, |c| c.len()),
 			self.code.as_ref().map_or_else(H256::new, |c| c.sha3()),
-			self.storage.len()
+			self.storage.len(),
 		)
 	}
 }

ethcore/src/snapshot/error.rs

@@ -45,6 +45,8 @@ pub enum Error {
 	MissingCode(Vec<H256>),
 	/// Unrecognized code encoding.
 	UnrecognizedCodeState(u8),
+	/// Restoration aborted.
+	RestorationAborted,
 	/// Trie error.
 	Trie(TrieError),
 	/// Decoder error.
@@ -67,6 +69,7 @@ impl fmt::Display for Error {
 				a pruned database. Please re-run with the --pruning archive flag."),
 			Error::MissingCode(ref missing) => write!(f, "Incomplete snapshot: {} contract codes not found.", missing.len()),
 			Error::UnrecognizedCodeState(state) => write!(f, "Unrecognized code encoding ({})", state),
+			Error::RestorationAborted => write!(f, "Snapshot restoration aborted."),
 			Error::Io(ref err) => err.fmt(f),
 			Error::Decoder(ref err) => err.fmt(f),
 			Error::Trie(ref err) => err.fmt(f),

ethcore/src/snapshot/mod.rs

@@ -407,30 +407,28 @@ impl StateRebuilder {
 	}
 
 	/// Feed an uncompressed state chunk into the rebuilder.
-	pub fn feed(&mut self, chunk: &[u8]) -> Result<(), ::error::Error> {
+	pub fn feed(&mut self, chunk: &[u8], flag: &AtomicBool) -> Result<(), ::error::Error> {
 		let rlp = UntrustedRlp::new(chunk);
 		let empty_rlp = StateAccount::new_basic(U256::zero(), U256::zero()).rlp();
-		let account_fat_rlps: Vec<_> = rlp.iter().map(|r| r.as_raw()).collect();
 		let mut pairs = Vec::with_capacity(rlp.item_count());
 
 		// initialize the pairs vector with empty values so we have slots to write into.
 		pairs.resize(rlp.item_count(), (H256::new(), Vec::new()));
 
-		let chunk_size = account_fat_rlps.len() / ::num_cpus::get() + 1;
+		let status = try!(rebuild_accounts(
+			self.db.as_hashdb_mut(),
+			rlp,
+			&mut pairs,
+			&self.code_map,
+			flag
+		));
 
-		// new code contained within this chunk.
+		for (addr_hash, code_hash) in status.missing_code {
-		let mut chunk_code = HashMap::new();
+			self.missing_code.entry(code_hash).or_insert_with(Vec::new).push(addr_hash);
-
-		for (account_chunk, out_pairs_chunk) in account_fat_rlps.chunks(chunk_size).zip(pairs.chunks_mut(chunk_size)) {
-			let code_map = &self.code_map;
-			let status = try!(rebuild_accounts(self.db.as_hashdb_mut(), account_chunk, out_pairs_chunk, code_map));
-			chunk_code.extend(status.new_code);
-			for (addr_hash, code_hash) in status.missing_code {
-				self.missing_code.entry(code_hash).or_insert_with(Vec::new).push(addr_hash);
-			}
 		}
+
 		// patch up all missing code. must be done after collecting all new missing code entries.
-		for (code_hash, code) in chunk_code {
+		for (code_hash, code) in status.new_code {
 			for addr_hash in self.missing_code.remove(&code_hash).unwrap_or_else(Vec::new) {
 				let mut db = AccountDBMut::from_hash(self.db.as_hashdb_mut(), addr_hash);
 				db.emplace(code_hash, DBValue::from_slice(&code));
@@ -450,6 +448,8 @@ impl StateRebuilder {
 			};
 
 			for (hash, thin_rlp) in pairs {
+				if !flag.load(Ordering::SeqCst) { return Err(Error::RestorationAborted.into()) }
+
 				if &thin_rlp[..] != &empty_rlp[..] {
 					self.bloom.set(&*hash);
 				}
@@ -487,17 +487,18 @@ struct RebuiltStatus {
 }
 
 // rebuild a set of accounts and their storage.
-// returns
+// returns a status detailing newly-loaded code and accounts missing code.
 fn rebuild_accounts(
 	db: &mut HashDB,
-	account_chunk: &[&[u8]],
+	account_fat_rlps: UntrustedRlp,
 	out_chunk: &mut [(H256, Bytes)],
-	code_map: &HashMap<H256, Bytes>
+	code_map: &HashMap<H256, Bytes>,
+	abort_flag: &AtomicBool
 ) -> Result<RebuiltStatus, ::error::Error>
 {
 	let mut status = RebuiltStatus::default();
-	for (account_pair, out) in account_chunk.into_iter().zip(out_chunk) {
+	for (account_rlp, out) in account_fat_rlps.into_iter().zip(out_chunk) {
-		let account_rlp = UntrustedRlp::new(account_pair);
+		if !abort_flag.load(Ordering::SeqCst) { return Err(Error::RestorationAborted.into()) }
 
 		let hash: H256 = try!(account_rlp.val_at(0));
 		let fat_rlp = try!(account_rlp.at(1));
@@ -580,7 +581,7 @@ impl BlockRebuilder {
 
 	/// Feed the rebuilder an uncompressed block chunk.
 	/// Returns the number of blocks fed or any errors.
-	pub fn feed(&mut self, chunk: &[u8], engine: &Engine) -> Result<u64, ::error::Error> {
+	pub fn feed(&mut self, chunk: &[u8], engine: &Engine, abort_flag: &AtomicBool) -> Result<u64, ::error::Error> {
 		use basic_types::Seal::With;
 		use util::U256;
 		use util::triehash::ordered_trie_root;
@@ -601,6 +602,8 @@ impl BlockRebuilder {
 		let parent_total_difficulty = try!(rlp.val_at::<U256>(2));
 
 		for idx in 3..item_count {
+			if !abort_flag.load(Ordering::SeqCst) { return Err(Error::RestorationAborted.into()) }
+
 			let pair = try!(rlp.at(idx));
 			let abridged_rlp = try!(pair.at(0)).as_raw().to_owned();
 			let abridged_block = AbridgedBlock::from_raw(abridged_rlp);

ethcore/src/snapshot/service.rs

@@ -118,12 +118,12 @@ impl Restoration {
 		})
 	}
 
-	// feeds a state chunk
+	// feeds a state chunk, aborts early if `flag` becomes false.
-	fn feed_state(&mut self, hash: H256, chunk: &[u8]) -> Result<(), Error> {
+	fn feed_state(&mut self, hash: H256, chunk: &[u8], flag: &AtomicBool) -> Result<(), Error> {
 		if self.state_chunks_left.remove(&hash) {
 			let len = try!(snappy::decompress_into(chunk, &mut self.snappy_buffer));
 
-			try!(self.state.feed(&self.snappy_buffer[..len]));
+			try!(self.state.feed(&self.snappy_buffer[..len], flag));
 
 			if let Some(ref mut writer) = self.writer.as_mut() {
 				try!(writer.write_state_chunk(hash, chunk));
@@ -134,11 +134,11 @@ impl Restoration {
 	}
 
 	// feeds a block chunk
-	fn feed_blocks(&mut self, hash: H256, chunk: &[u8], engine: &Engine) -> Result<(), Error> {
+	fn feed_blocks(&mut self, hash: H256, chunk: &[u8], engine: &Engine, flag: &AtomicBool) -> Result<(), Error> {
 		if self.block_chunks_left.remove(&hash) {
 			let len = try!(snappy::decompress_into(chunk, &mut self.snappy_buffer));
 
-			try!(self.blocks.feed(&self.snappy_buffer[..len], engine));
+			try!(self.blocks.feed(&self.snappy_buffer[..len], engine, flag));
 			if let Some(ref mut writer) = self.writer.as_mut() {
 				 try!(writer.write_block_chunk(hash, chunk));
 			}
@@ -224,6 +224,7 @@ pub struct Service {
 	db_restore: Arc<DatabaseRestore>,
 	progress: super::Progress,
 	taking_snapshot: AtomicBool,
+	restoring_snapshot: AtomicBool,
 }
 
 impl Service {
@@ -244,6 +245,7 @@ impl Service {
 			db_restore: params.db_restore,
 			progress: Default::default(),
 			taking_snapshot: AtomicBool::new(false),
+			restoring_snapshot: AtomicBool::new(false),
 		};
 
 		// create the root snapshot dir if it doesn't exist.
@@ -436,6 +438,8 @@ impl Service {
 			state_chunks_done: self.state_chunks.load(Ordering::SeqCst) as u32,
 			block_chunks_done: self.block_chunks.load(Ordering::SeqCst) as u32,
 		};
+
+		self.restoring_snapshot.store(true, Ordering::SeqCst);
 		Ok(())
 	}
 
@@ -490,8 +494,8 @@ impl Service {
 						};
 
 						(match is_state {
-							true => rest.feed_state(hash, chunk),
+							true => rest.feed_state(hash, chunk, &self.restoring_snapshot),
-							false => rest.feed_blocks(hash, chunk, &*self.engine),
+							false => rest.feed_blocks(hash, chunk, &*self.engine, &self.restoring_snapshot),
 						}.map(|_| rest.is_done()), rest.db.clone())
 					};
 
@@ -573,6 +577,7 @@ impl SnapshotService for Service {
 	}
 
 	fn abort_restore(&self) {
+		self.restoring_snapshot.store(false, Ordering::SeqCst);
 		*self.restoration.lock() = None;
 		*self.status.lock() = RestorationStatus::Inactive;
 	}

ethcore/src/snapshot/tests/blocks.rs

@@ -17,10 +17,11 @@
 //! Block chunker and rebuilder tests.
 
 use devtools::RandomTempPath;
+use error::Error;
 
 use blockchain::generator::{ChainGenerator, ChainIterator, BlockFinalizer};
 use blockchain::BlockChain;
-use snapshot::{chunk_blocks, BlockRebuilder, Progress};
+use snapshot::{chunk_blocks, BlockRebuilder, Error as SnapshotError, Progress};
 use snapshot::io::{PackedReader, PackedWriter, SnapshotReader, SnapshotWriter};
 
 use util::{Mutex, snappy};
@@ -28,6 +29,7 @@ use util::kvdb::{Database, DatabaseConfig};
 
 use std::collections::HashMap;
 use std::sync::Arc;
+use std::sync::atomic::AtomicBool;
 
 fn chunk_and_restore(amount: u64) {
 	let mut canon_chain = ChainGenerator::default();
@@ -75,10 +77,11 @@ fn chunk_and_restore(amount: u64) {
 	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).unwrap();
+		rebuilder.feed(&chunk, &engine, &flag).unwrap();
 	}
 
 	rebuilder.finalize(HashMap::new()).unwrap();
@@ -93,3 +96,46 @@ fn chunk_and_restore_500() { chunk_and_restore(500) }
 
 #[test]
 fn chunk_and_restore_40k() { chunk_and_restore(40000) }
+
+#[test]
+fn checks_flag() {
+	use ::rlp::{RlpStream, Stream};
+	use util::H256;
+
+	let mut stream = RlpStream::new_list(5);
+
+	stream.append(&100u64)
+		.append(&H256::default())
+		.append(&(!0u64));
+
+	stream.append_empty_data().append_empty_data();
+
+	let genesis = {
+		let mut canon_chain = ChainGenerator::default();
+		let mut finalizer = BlockFinalizer::default();
+		canon_chain.generate(&mut finalizer).unwrap()
+	};
+
+	let chunk = stream.out();
+	let path = RandomTempPath::create_dir();
+
+	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 = ::engines::NullEngine::new(Default::default(), Default::default());
+
+	let manifest = ::snapshot::ManifestData {
+		state_hashes: Vec::new(),
+		block_hashes: Vec::new(),
+		state_root: ::util::sha3::SHA3_NULL_RLP,
+		block_number: 102,
+		block_hash: H256::default(),
+	};
+
+	let mut rebuilder = BlockRebuilder::new(chain, db.clone(), &manifest).unwrap();
+
+	match rebuilder.feed(&chunk, &engine, &AtomicBool::new(false)) {
+		Err(Error::Snapshot(SnapshotError::RestorationAborted)) => {}
+		_ => panic!("Wrong result on abort flag set")
+	}
+}

ethcore/src/snapshot/tests/state.rs

@@ -16,10 +16,12 @@
 
 //! State snapshotting tests.
 
-use snapshot::{chunk_state, Progress, StateRebuilder};
+use snapshot::{chunk_state, Error as SnapshotError, Progress, StateRebuilder};
 use snapshot::io::{PackedReader, PackedWriter, SnapshotReader, SnapshotWriter};
 use super::helpers::{compare_dbs, StateProducer};
 
+use error::Error;
+
 use rand::{XorShiftRng, SeedableRng};
 use util::hash::H256;
 use util::journaldb::{self, Algorithm};
@@ -29,6 +31,7 @@ use util::Mutex;
 use devtools::RandomTempPath;
 
 use std::sync::Arc;
+use std::sync::atomic::AtomicBool;
 
 #[test]
 fn snap_and_restore() {
@@ -65,11 +68,13 @@ fn snap_and_restore() {
 		let mut rebuilder = StateRebuilder::new(new_db.clone(), Algorithm::Archive);
 		let reader = PackedReader::new(&snap_file).unwrap().unwrap();
 
+		let flag = AtomicBool::new(true);
+
 		for chunk_hash in &reader.manifest().state_hashes {
 			let raw = reader.chunk(*chunk_hash).unwrap();
 			let chunk = ::util::snappy::decompress(&raw).unwrap();
 
-			rebuilder.feed(&chunk).unwrap();
+			rebuilder.feed(&chunk, &flag).unwrap();
 		}
 
 		assert_eq!(rebuilder.state_root(), state_root);
@@ -82,3 +87,52 @@ fn snap_and_restore() {
 
 	compare_dbs(&old_db, new_db.as_hashdb());
 }
+
+#[test]
+fn checks_flag() {
+	let mut producer = StateProducer::new();
+	let mut rng = XorShiftRng::from_seed([5, 6, 7, 8]);
+	let mut old_db = MemoryDB::new();
+	let db_cfg = DatabaseConfig::with_columns(::db::NUM_COLUMNS);
+
+	for _ in 0..10 {
+		producer.tick(&mut rng, &mut old_db);
+	}
+
+	let snap_dir = RandomTempPath::create_dir();
+	let mut snap_file = snap_dir.as_path().to_owned();
+	snap_file.push("SNAP");
+
+	let state_root = producer.state_root();
+	let writer = Mutex::new(PackedWriter::new(&snap_file).unwrap());
+
+	let state_hashes = chunk_state(&old_db, &state_root, &writer, &Progress::default()).unwrap();
+
+	writer.into_inner().finish(::snapshot::ManifestData {
+		state_hashes: state_hashes,
+		block_hashes: Vec::new(),
+		state_root: state_root,
+		block_number: 0,
+		block_hash: H256::default(),
+	}).unwrap();
+
+	let mut db_path = snap_dir.as_path().to_owned();
+	db_path.push("db");
+	{
+		let new_db = Arc::new(Database::open(&db_cfg, &db_path.to_string_lossy()).unwrap());
+		let mut rebuilder = StateRebuilder::new(new_db.clone(), Algorithm::Archive);
+		let reader = PackedReader::new(&snap_file).unwrap().unwrap();
+
+		let flag = AtomicBool::new(false);
+
+		for chunk_hash in &reader.manifest().state_hashes {
+			let raw = reader.chunk(*chunk_hash).unwrap();
+			let chunk = ::util::snappy::decompress(&raw).unwrap();
+
+			match rebuilder.feed(&chunk, &flag) {
+				Err(Error::Snapshot(SnapshotError::RestorationAborted)) => {},
+				_ => panic!("unexpected result when feeding with flag off"),
+			}
+		}
+	}
+}

ethcore/src/spec/spec.rs

@@ -163,7 +163,7 @@ impl Spec {
 	/// Get the configured Network ID.
 	pub fn network_id(&self) -> usize { self.params.network_id }
 
-	/// Get the configured Network ID.
+	/// Get the configured subprotocol name.
 	pub fn subprotocol_name(&self) -> String { self.params.subprotocol_name.clone() }
 
 	/// Get the configured network fork block.

ethcore/src/types/mod.rs.in

@@ -33,4 +33,4 @@ pub mod transaction_import;
 pub mod block_import_error;
 pub mod restoration_status;
 pub mod snapshot_manifest;
-pub mod mode;
+pub mod mode;

ethcore/src/verification/canon_verifier.rs

@@ -14,6 +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/>.
 
+//! Canonical verifier.
+
 use blockchain::BlockProvider;
 use engines::Engine;
 use error::Error;
@@ -21,6 +23,7 @@ use header::Header;
 use super::Verifier;
 use super::verification;
 
+/// A canonial verifier -- this does full verification.
 pub struct CanonVerifier;
 
 impl Verifier for CanonVerifier {

ethcore/src/verification/mod.rs

@@ -14,6 +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/>.
 
+//! Block verification utilities.
+
 pub mod verification;
 pub mod verifier;
 pub mod queue;
@@ -44,6 +46,7 @@ impl Default for VerifierType {
 	}
 }
 
+/// Create a new verifier based on type.
 pub fn new(v: VerifierType) -> Box<Verifier> {
 	match v {
 		VerifierType::Canon | VerifierType::CanonNoSeal => Box::new(CanonVerifier),

ethcore/src/verification/noop_verifier.rs

@@ -14,12 +14,15 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+//! No-op verifier.
+
 use blockchain::BlockProvider;
 use engines::Engine;
 use error::Error;
 use header::Header;
 use super::Verifier;
 
+/// A no-op verifier -- this will verify everything it's given immediately.
 #[allow(dead_code)]
 pub struct NoopVerifier;
 

ethcore/src/verification/verification.rs

@@ -14,12 +14,12 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-/// Block and transaction verification functions
+//! Block and transaction verification functions
-///
+//!
-/// Block verification is done in 3 steps
+//! Block verification is done in 3 steps
-/// 1. Quick verification upon adding to the block queue
+//! 1. Quick verification upon adding to the block queue
-/// 2. Signatures verification done in the queue.
+//! 2. Signatures verification done in the queue.
-/// 3. Final verification against the blockchain done before enactment.
+//! 3. Final verification against the blockchain done before enactment.
 
 use util::*;
 use engines::Engine;

ethcore/src/verification/verifier.rs

@@ -14,6 +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/>.
 
+//! A generic verifier trait.
+
 use blockchain::BlockProvider;
 use engines::Engine;
 use error::Error;
@@ -21,6 +23,8 @@ use header::Header;
 
 /// Should be used to verify blocks.
 pub trait Verifier: Send + Sync {
+	/// Verify a block relative to its parent and uncles.
 	fn verify_block_family(&self, header: &Header, bytes: &[u8], engine: &Engine, bc: &BlockProvider) -> Result<(), Error>;
+	/// Do a final verification check for an enacted header vs its expected counterpart.
 	fn verify_block_final(&self, expected: &Header, got: &Header) -> Result<(), Error>;
 }

js/.gitignore

@@ -6,3 +6,4 @@ build
 .dist
 .happypack
 .npmjs
+.eslintcache

js/README.md

@@ -7,6 +7,6 @@ JavaScript APIs and UIs for Parity.
 0. Install [Node](https://nodejs.org/) if not already available
 0. Change to the `js` directory inside `parity/`
 0. Install the npm modules via `npm install`
-0. Parity should be run with `parity --signer-no-validation [...options]` (where `options` can be `--chain testnet`)
+0. Parity should be run with `parity --ui-no-validation [...options]` (where `options` can be `--chain testnet`)
 0. Start the development environment via `npm start`
 0. Connect to the [UI](http://localhost:3000)

js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "parity.js",
-  "version": "0.2.21",
+  "version": "0.2.37",
   "main": "release/index.js",
   "jsnext:main": "src/index.js",
   "author": "Parity Team <admin@parity.io>",
@@ -39,9 +39,11 @@
     "clean": "rm -rf ./build ./coverage",
     "coveralls": "npm run testCoverage && coveralls < coverage/lcov.info",
     "lint": "eslint --ignore-path .gitignore ./src/",
+    "lint:cached": "eslint --cache --ignore-path .gitignore ./src/",
     "test": "mocha 'src/**/*.spec.js'",
     "test:coverage": "istanbul cover _mocha -- 'src/**/*.spec.js'",
-    "test:e2e": "mocha 'src/**/*.e2e.js'"
+    "test:e2e": "mocha 'src/**/*.e2e.js'",
+    "prepush": "npm run lint:cached"
   },
   "devDependencies": {
     "babel-cli": "^6.10.1",
@@ -84,6 +86,7 @@
     "happypack": "^2.2.1",
     "history": "^2.0.0",
     "html-loader": "^0.4.4",
+    "husky": "^0.11.9",
     "ignore-styles": "2.0.0",
     "image-webpack-loader": "^1.8.0",
     "istanbul": "^1.0.0-alpha.2",
@@ -97,6 +100,7 @@
     "postcss-loader": "^0.8.1",
     "postcss-nested": "^1.0.0",
     "postcss-simple-vars": "^3.0.0",
+    "raw-loader": "^0.5.1",
     "react-addons-test-utils": "^15.3.0",
     "react-copy-to-clipboard": "^4.2.3",
     "react-hot-loader": "^1.3.0",
@@ -115,9 +119,11 @@
   "dependencies": {
     "bignumber.js": "^2.3.0",
     "blockies": "0.0.2",
+    "brace": "^0.9.0",
     "bytes": "^2.4.0",
     "chart.js": "^2.3.0",
     "es6-promise": "^3.2.1",
+    "ethereumjs-tx": "^1.1.2",
     "file-saver": "^1.3.3",
     "format-json": "^1.0.3",
     "format-number": "^2.0.1",
@@ -134,9 +140,11 @@
     "moment": "^2.14.1",
     "qs": "^6.3.0",
     "react": "^15.2.1",
+    "react-ace": "^4.0.0",
     "react-addons-css-transition-group": "^15.2.1",
     "react-chartjs-2": "^1.5.0",
     "react-dom": "^15.2.1",
+    "react-dropzone": "^3.7.3",
     "react-redux": "^4.4.5",
     "react-router": "^2.6.1",
     "react-router-redux": "^4.0.5",
@@ -147,10 +155,14 @@
     "redux-actions": "^0.10.1",
     "redux-thunk": "^2.1.0",
     "rlp": "^2.0.0",
+    "scryptsy": "^2.0.0",
+    "solc": "ngotchac/solc-js",
     "store": "^1.3.20",
     "utf8": "^2.1.1",
+    "valid-url": "^1.0.9",
     "validator": "^5.7.0",
     "web3": "^0.17.0-beta",
-    "whatwg-fetch": "^1.0.0"
+    "whatwg-fetch": "^1.0.0",
+    "worker-loader": "^0.7.1"
   }
 }

js/scripts/release.sh

@@ -63,7 +63,7 @@ if [ "$BRANCH" == "master" ]; then
 
   echo "*** Publishing $PACKAGE to npmjs"
   cd .npmjs
-  npm publish --access public
+  npm publish --access public || true
   cd ../..
 fi
 

js/src/api/api.spec.js

@@ -34,7 +34,7 @@ describe('api/Api', () => {
   });
 
   describe('interface', () => {
-    const api = new Api(new Api.Transport.Http(TEST_HTTP_URL));
+    const api = new Api(new Api.Transport.Http(TEST_HTTP_URL, -1));
 
     Object.keys(ethereumRpc).sort().forEach((endpoint) => {
       describe(endpoint, () => {

js/src/api/contract/contract.js

@@ -136,27 +136,30 @@ export default class Contract {
   }
 
   parseEventLogs (logs) {
-    return logs.map((log) => {
+    return logs
-      const signature = log.topics[0].substr(2);
+      .map((log) => {
-      const event = this.events.find((evt) => evt.signature === signature);
+        const signature = log.topics[0].substr(2);
+        const event = this.events.find((evt) => evt.signature === signature);
 
-      if (!event) {
+        if (!event) {
-        throw new Error(`Unable to find event matching signature ${signature}`);
+          console.warn(`Unable to find event matching signature ${signature}`);
-      }
+          return null;
+        }
 
-      const decoded = event.decodeLog(log.topics, log.data);
+        const decoded = event.decodeLog(log.topics, log.data);
 
-      log.params = {};
+        log.params = {};
-      log.event = event.name;
+        log.event = event.name;
 
-      decoded.params.forEach((param) => {
+        decoded.params.forEach((param) => {
-        const { type, value } = param.token;
+          const { type, value } = param.token;
 
-        log.params[param.name] = { type, value };
+          log.params[param.name] = { type, value };
-      });
+        });
 
-      return log;
+        return log;
-    });
+      })
+      .filter((log) => log);
   }
 
   parseTransactionEvents (receipt) {
@@ -306,7 +309,6 @@ export default class Contract {
           try {
             subscriptions[idx].callback(null, this.parseEventLogs(logs));
           } catch (error) {
-            this.unsubscribe(idx);
             console.error('_sendSubscriptionChanges', error);
           }
         });

js/src/api/contract/contract.spec.js

@@ -25,7 +25,7 @@ import Api from '../api';
 import Contract from './contract';
 import { isInstanceOf, isFunction } from '../util/types';
 
-const transport = new Api.Transport.Http(TEST_HTTP_URL);
+const transport = new Api.Transport.Http(TEST_HTTP_URL, -1);
 const eth = new Api(transport);
 
 describe('api/contract/Contract', () => {
@@ -119,19 +119,6 @@ describe('api/contract/Contract', () => {
   });
 
   describe('parseTransactionEvents', () => {
-    it('checks for unmatched signatures', () => {
-      const contract = new Contract(eth, [{ anonymous: false, name: 'Message', type: 'event' }]);
-      expect(() => contract.parseTransactionEvents({
-        logs: [{
-          data: '0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000063cf90d3f0410092fc0fca41846f5962239791950000000000000000000000000000000000000000000000000000000056e6c85f0000000000000000000000000000000000000000000000000001000000004fcd00000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000000d706f7374286d6573736167652900000000000000000000000000000000000000',
-          topics: [
-            '0x954ba6c157daf8a26539574ffa64203c044691aa57251af95f4b48d85ec00dd5',
-            '0x0000000000000000000000000000000000000000000000000001000000004fe0'
-          ]
-        }]
-      })).to.throw(/event matching signature/);
-    });
-
     it('parses a transaction log into the data', () => {
       const contract = new Contract(eth, [
         {

js/src/api/format/input.js

@@ -93,6 +93,10 @@ export function inFilter (options) {
 }
 
 export function inHex (str) {
+  if (str && str.toString) {
+    str = str.toString(16);
+  }
+
   if (str && str.substr(0, 2) === '0x') {
     return str.toLowerCase();
   }

js/src/api/rpc/db/db.spec.js

@@ -19,7 +19,7 @@ import { TEST_HTTP_URL, mockHttp } from '../../../../test/mockRpc';
 import Http from '../../transport/http';
 import Db from './db';
 
-const instance = new Db(new Http(TEST_HTTP_URL));
+const instance = new Db(new Http(TEST_HTTP_URL, -1));
 
 describe('api/rpc/Db', () => {
   let scope;

js/src/api/rpc/eth/eth.spec.js

@@ -20,7 +20,7 @@ import { isBigNumber } from '../../../../test/types';
 import Http from '../../transport/http';
 import Eth from './eth';
 
-const instance = new Eth(new Http(TEST_HTTP_URL));
+const instance = new Eth(new Http(TEST_HTTP_URL, -1));
 
 describe('rpc/Eth', () => {
   const address = '0x63Cf90D3f0410092FC0fca41846f596223979195';

js/src/api/rpc/net/net.spec.js

@@ -20,7 +20,7 @@ import { isBigNumber } from '../../../../test/types';
 import Http from '../../transport/http';
 import Net from './net';
 
-const instance = new Net(new Http(TEST_HTTP_URL));
+const instance = new Net(new Http(TEST_HTTP_URL, -1));
 
 describe('api/rpc/Net', () => {
   describe('peerCount', () => {

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

@@ -60,6 +60,11 @@ export default class Parity {
       .then(outNumber);
   }
 
+  dappsInterface () {
+    return this._transport
+      .execute('parity_dappsInterface');
+  }
+
   defaultExtraData () {
     return this._transport
       .execute('parity_defaultExtraData');
@@ -176,6 +181,12 @@ export default class Parity {
       .then(outAddress);
   }
 
+  nextNonce (account) {
+    return this._transport
+      .execute('parity_nextNonce', inAddress(account))
+      .then(outNumber);
+  }
+
   nodeName () {
     return this._transport
       .execute('parity_nodeName');

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

@@ -20,7 +20,7 @@ import { isBigNumber } from '../../../../test/types';
 import Http from '../../transport/http';
 import Parity from './parity';
 
-const instance = new Parity(new Http(TEST_HTTP_URL));
+const instance = new Parity(new Http(TEST_HTTP_URL, -1));
 
 describe('api/rpc/parity', () => {
   describe('accountsInfo', () => {

js/src/api/rpc/personal/personal.spec.js

@@ -19,7 +19,7 @@ import { TEST_HTTP_URL, mockHttp } from '../../../../test/mockRpc';
 import Http from '../../transport/http';
 import Personal from './personal';
 
-const instance = new Personal(new Http(TEST_HTTP_URL));
+const instance = new Personal(new Http(TEST_HTTP_URL, -1));
 
 describe('rpc/Personal', () => {
   const account = '0x63cf90d3f0410092fc0fca41846f596223979195';

js/src/api/rpc/signer/signer.js

@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-import { inNumber16 } from '../../format/input';
+import { inNumber16, inData } from '../../format/input';
 import { outSignerRequest } from '../../format/output';
 
 export default class Signer {
@@ -27,6 +27,11 @@ export default class Signer {
       .execute('signer_confirmRequest', inNumber16(requestId), options, password);
   }
 
+  confirmRequestRaw (requestId, data) {
+    return this._transport
+      .execute('signer_confirmRequestRaw', inNumber16(requestId), inData(data));
+  }
+
   generateAuthorizationToken () {
     return this._transport
       .execute('signer_generateAuthorizationToken');

js/src/api/rpc/trace/trace.spec.js

@@ -19,7 +19,7 @@ import { TEST_HTTP_URL, mockHttp } from '../../../../test/mockRpc';
 import Http from '../../transport/http';
 import Trace from './trace';
 
-const instance = new Trace(new Http(TEST_HTTP_URL));
+const instance = new Trace(new Http(TEST_HTTP_URL, -1));
 
 describe('api/rpc/Trace', () => {
   let scope;

js/src/api/rpc/web3/web3.spec.js

@@ -19,7 +19,7 @@ import { TEST_HTTP_URL, mockHttp } from '../../../../test/mockRpc';
 import Http from '../../transport/http';
 import Web3 from './web3';
 
-const instance = new Web3(new Http(TEST_HTTP_URL));
+const instance = new Web3(new Http(TEST_HTTP_URL, -1));
 
 describe('api/rpc/Web3', () => {
   let scope;

js/src/api/subscriptions/manager.js

@@ -107,7 +107,6 @@ export default class Manager {
       callback(error, data);
     } catch (error) {
       console.error(`Unable to update callback for subscriptionId ${subscriptionId}`, error);
-      this.unsubscribe(subscriptionId);
     }
   }
 

js/src/api/transport/http/http.js

@@ -19,11 +19,14 @@ import JsonRpcBase from '../jsonRpcBase';
 
 /* global fetch */
 export default class Http extends JsonRpcBase {
-  constructor (url) {
+  constructor (url, connectTimeout = 1000) {
     super();
 
     this._connected = true;
     this._url = url;
+    this._connectTimeout = connectTimeout;
+
+    this._pollConnection();
   }
 
   _encodeOptions (method, params) {
@@ -77,4 +80,17 @@ export default class Http extends JsonRpcBase {
         return response.result;
       });
   }
+
+  _pollConnection = () => {
+    if (this._connectTimeout <= 0) {
+      return;
+    }
+
+    const nextTimeout = () => setTimeout(this._pollConnection, this._connectTimeout);
+
+    this
+      .execute('net_listening')
+      .then(nextTimeout)
+      .catch(nextTimeout);
+  }
 }

js/src/api/transport/http/http.spec.js

@@ -17,7 +17,7 @@
 import { TEST_HTTP_URL, mockHttp } from '../../../../test/mockRpc';
 import Http from './http';
 
-const transport = new Http(TEST_HTTP_URL);
+const transport = new Http(TEST_HTTP_URL, -1);
 
 describe('api/transport/Http', () => {
   describe('instance', () => {

js/src/contracts/abi/index.js

@@ -24,6 +24,7 @@ import owned from './owned.json';
 import registry from './registry.json';
 import signaturereg from './signaturereg.json';
 import tokenreg from './tokenreg.json';
+import wallet from './wallet.json';
 
 export {
   basiccoin,
@@ -35,5 +36,6 @@ export {
   owned,
   registry,
   signaturereg,
-  tokenreg
+  tokenreg,
+  wallet
 };

js/src/contracts/abi/wallet.json

@@ -0,0 +1 @@
+[{"constant":false,"inputs":[{"name":"_owner","type":"address"}],"name":"removeOwner","outputs":[],"type":"function"},{"constant":false,"inputs":[{"name":"_addr","type":"address"}],"name":"isOwner","outputs":[{"name":"","type":"bool"}],"type":"function"},{"constant":true,"inputs":[],"name":"m_numOwners","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[],"name":"m_lastDay","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":false,"inputs":[],"name":"resetSpentToday","outputs":[],"type":"function"},{"constant":true,"inputs":[],"name":"m_spentToday","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":false,"inputs":[{"name":"_owner","type":"address"}],"name":"addOwner","outputs":[],"type":"function"},{"constant":true,"inputs":[],"name":"m_required","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":false,"inputs":[{"name":"_h","type":"bytes32"}],"name":"confirm","outputs":[{"name":"","type":"bool"}],"type":"function"},{"constant":false,"inputs":[{"name":"_newLimit","type":"uint256"}],"name":"setDailyLimit","outputs":[],"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"},{"name":"_data","type":"bytes"}],"name":"execute","outputs":[{"name":"_r","type":"bytes32"}],"type":"function"},{"constant":false,"inputs":[{"name":"_operation","type":"bytes32"}],"name":"revoke","outputs":[],"type":"function"},{"constant":false,"inputs":[{"name":"_newRequired","type":"uint256"}],"name":"changeRequirement","outputs":[],"type":"function"},{"constant":true,"inputs":[{"name":"_operation","type":"bytes32"},{"name":"_owner","type":"address"}],"name":"hasConfirmed","outputs":[{"name":"","type":"bool"}],"type":"function"},{"constant":true,"inputs":[{"name":"ownerIndex","type":"uint256"}],"name":"getOwner","outputs":[{"name":"","type":"address"}],"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"}],"name":"kill","outputs":[],"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"}],"name":"changeOwner","outputs":[],"type":"function"},{"constant":true,"inputs":[],"name":"m_dailyLimit","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"inputs":[{"name":"_owners","type":"address[]"},{"name":"_required","type":"uint256"},{"name":"_daylimit","type":"uint256"}],"type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"name":"owner","type":"address"},{"indexed":false,"name":"operation","type":"bytes32"}],"name":"Confirmation","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"owner","type":"address"},{"indexed":false,"name":"operation","type":"bytes32"}],"name":"Revoke","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"oldOwner","type":"address"},{"indexed":false,"name":"newOwner","type":"address"}],"name":"OwnerChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"newOwner","type":"address"}],"name":"OwnerAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"oldOwner","type":"address"}],"name":"OwnerRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"newRequirement","type":"uint256"}],"name":"RequirementChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_from","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"owner","type":"address"},{"indexed":false,"name":"value","type":"uint256"},{"indexed":false,"name":"to","type":"address"},{"indexed":false,"name":"data","type":"bytes"}],"name":"SingleTransact","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"owner","type":"address"},{"indexed":false,"name":"operation","type":"bytes32"},{"indexed":false,"name":"value","type":"uint256"},{"indexed":false,"name":"to","type":"address"},{"indexed":false,"name":"data","type":"bytes"}],"name":"MultiTransact","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"operation","type":"bytes32"},{"indexed":false,"name":"initiator","type":"address"},{"indexed":false,"name":"value","type":"uint256"},{"indexed":false,"name":"to","type":"address"},{"indexed":false,"name":"data","type":"bytes"}],"name":"ConfirmationNeeded","type":"event"}]

js/src/contracts/snippets/human-standard-token.sol

@@ -0,0 +1,60 @@
+/*
+This Token Contract implements the standard token functionality (https://github.com/ethereum/EIPs/issues/20) as well as the following OPTIONAL extras intended for use by humans.
+
+In other words. This is intended for deployment in something like a Token Factory or Mist wallet, and then used by humans.
+Imagine coins, currencies, shares, voting weight, etc.
+Machine-based, rapid creation of many tokens would not necessarily need these extra features or will be minted in other manners.
+
+1) Initial Finite Supply (upon creation one specifies how much is minted).
+2) In the absence of a token registry: Optional Decimal, Symbol & Name.
+3) Optional approveAndCall() functionality to notify a contract if an approval() has occurred.
+
+.*/
+
+import "StandardToken.sol";
+
+contract HumanStandardToken is StandardToken {
+
+    function () {
+        //if ether is sent to this address, send it back.
+        throw;
+    }
+
+    /* Public variables of the token */
+
+    /*
+    NOTE:
+    The following variables are OPTIONAL vanities. One does not have to include them.
+    They allow one to customise the token contract & in no way influences the core functionality.
+    Some wallets/interfaces might not even bother to look at this information.
+    */
+    string public name;                   //fancy name: eg Simon Bucks
+    uint8 public decimals;                //How many decimals to show. ie. There could 1000 base units with 3 decimals. Meaning 0.980 SBX = 980 base units. It's like comparing 1 wei to 1 ether.
+    string public symbol;                 //An identifier: eg SBX
+    string public version = 'H0.1';       //human 0.1 standard. Just an arbitrary versioning scheme.
+
+    function HumanStandardToken(
+        uint256 _initialAmount,
+        string _tokenName,
+        uint8 _decimalUnits,
+        string _tokenSymbol
+        ) {
+        balances[msg.sender] = _initialAmount;               // Give the creator all initial tokens
+        totalSupply = _initialAmount;                        // Update total supply
+        name = _tokenName;                                   // Set the name for display purposes
+        decimals = _decimalUnits;                            // Amount of decimals for display purposes
+        symbol = _tokenSymbol;                               // Set the symbol for display purposes
+    }
+
+    /* Approves and then calls the receiving contract */
+    function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
+        allowed[msg.sender][_spender] = _value;
+        Approval(msg.sender, _spender, _value);
+
+        //call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.
+        //receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
+        //it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
+        if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }
+        return true;
+    }
+}

js/src/contracts/snippets/standard-token.sol

@@ -0,0 +1,55 @@
+/*
+You should inherit from StandardToken or, for a token like you would want to
+deploy in something like Mist, see HumanStandardToken.sol.
+(This implements ONLY the standard functions and NOTHING else.
+If you deploy this, you won't have anything useful.)
+
+Implements ERC 20 Token standard: https://github.com/ethereum/EIPs/issues/20
+.*/
+
+import "Token.sol";
+
+contract StandardToken is Token {
+
+    function transfer(address _to, uint256 _value) returns (bool success) {
+        //Default assumes totalSupply can't be over max (2^256 - 1).
+        //If your token leaves out totalSupply and can issue more tokens as time goes on, you need to check if it doesn't wrap.
+        //Replace the if with this one instead.
+        //if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
+        if (balances[msg.sender] >= _value && _value > 0) {
+            balances[msg.sender] -= _value;
+            balances[_to] += _value;
+            Transfer(msg.sender, _to, _value);
+            return true;
+        } else { return false; }
+    }
+
+    function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
+        //same as above. Replace this line with the following if you want to protect against wrapping uints.
+        //if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
+        if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
+            balances[_to] += _value;
+            balances[_from] -= _value;
+            allowed[_from][msg.sender] -= _value;
+            Transfer(_from, _to, _value);
+            return true;
+        } else { return false; }
+    }
+
+    function balanceOf(address _owner) constant returns (uint256 balance) {
+        return balances[_owner];
+    }
+
+    function approve(address _spender, uint256 _value) returns (bool success) {
+        allowed[msg.sender][_spender] = _value;
+        Approval(msg.sender, _spender, _value);
+        return true;
+    }
+
+    function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
+      return allowed[_owner][_spender];
+    }
+
+    mapping (address => uint256) balances;
+    mapping (address => mapping (address => uint256)) allowed;
+}

js/src/contracts/snippets/token.sol

@@ -0,0 +1,47 @@
+// Abstract contract for the full ERC 20 Token standard
+// https://github.com/ethereum/EIPs/issues/20
+
+contract Token {
+    /* This is a slight change to the ERC20 base standard.
+    function totalSupply() constant returns (uint256 supply);
+    is replaced with:
+    uint256 public totalSupply;
+    This automatically creates a getter function for the totalSupply.
+    This is moved to the base contract since public getter functions are not
+    currently recognised as an implementation of the matching abstract
+    function by the compiler.
+    */
+    /// total amount of tokens
+    uint256 public totalSupply;
+
+    /// @param _owner The address from which the balance will be retrieved
+    /// @return The balance
+    function balanceOf(address _owner) constant returns (uint256 balance);
+
+    /// @notice send `_value` token to `_to` from `msg.sender`
+    /// @param _to The address of the recipient
+    /// @param _value The amount of token to be transferred
+    /// @return Whether the transfer was successful or not
+    function transfer(address _to, uint256 _value) returns (bool success);
+
+    /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
+    /// @param _from The address of the sender
+    /// @param _to The address of the recipient
+    /// @param _value The amount of token to be transferred
+    /// @return Whether the transfer was successful or not
+    function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
+
+    /// @notice `msg.sender` approves `_addr` to spend `_value` tokens
+    /// @param _spender The address of the account able to transfer the tokens
+    /// @param _value The amount of wei to be approved for transfer
+    /// @return Whether the approval was successful or not
+    function approve(address _spender, uint256 _value) returns (bool success);
+
+    /// @param _owner The address of the account owning tokens
+    /// @param _spender The address of the account able to transfer the tokens
+    /// @return Amount of remaining tokens allowed to spent
+    function allowance(address _owner, address _spender) constant returns (uint256 remaining);
+
+    event Transfer(address indexed _from, address indexed _to, uint256 _value);
+    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
+}

js/src/dapps/basiccoin/Deploy/Deployment/deployment.js

@@ -148,7 +148,7 @@ export default class Deployment extends Component {
               addresses={ addresses }
               onChange={ this.onChangeFrom } />
             <div className={ styles.hint }>
-              the owner account to eploy from
+              the owner account to deploy from
             </div>
           </div>
           <div className={ nameError ? error : styles.input }>

js/src/dapps/githubhint/services.js

@@ -28,26 +28,26 @@ export function attachInterface () {
       return Promise
         .all([
           registry.getAddress.call({}, [api.util.sha3('githubhint'), 'A']),
-          api.eth.accounts(),
           api.parity.accounts()
         ]);
     })
-    .then(([address, addresses, accountsInfo]) => {
+    .then(([address, accountsInfo]) => {
-      accountsInfo = accountsInfo || {};
       console.log(`githubhint was found at ${address}`);
 
       const contract = api.newContract(abis.githubhint, address);
-      const accounts = addresses.reduce((obj, address) => {
+      const accounts = Object
-        const info = accountsInfo[address] || {};
+        .keys(accountsInfo)
+        .filter((address) => accountsInfo[address].uuid)
+        .reduce((obj, address) => {
+          const account = accountsInfo[address];
 
-        return Object.assign(obj, {
+          return Object.assign(obj, {
-          [address]: {
+            [address]: {
-            address,
+              address,
-            name: info.name,
+              name: account.name
-            uuid: info.uuid
+            }
-          }
+          });
-        });
+        }, {});
-      }, {});
       const fromAddress = Object.keys(accounts)[0];
 
       return {

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

@@ -49,3 +49,15 @@
     padding-bottom: 0 !important;
   }
 }
+
+.warning {
+  background: #f80;
+  bottom: 0;
+  color: #fff;
+  left: 0;
+  opacity: 1;
+  padding: 1.5em;
+  position: fixed;
+  right: 50%;
+  z-index: 100;
+}

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

@@ -53,6 +53,7 @@ export default class Application extends Component {
   };
 
   render () {
+    const { api } = window.parity;
     const {
       actions,
       accounts, contacts,
@@ -60,9 +61,11 @@ export default class Application extends Component {
       lookup,
       events
     } = this.props;
+    let warning = null;
 
     return (
       <div>
+        { warning }
         <div className={ styles.header }>
           <h1>RΞgistry</h1>
           <Accounts { ...accounts } actions={ actions.accounts } />
@@ -70,13 +73,11 @@ export default class Application extends Component {
         { contract && fee ? (
           <div>
             <Lookup { ...lookup } accounts={ accounts.all } contacts={ contacts } actions={ actions.lookup } />
-
             { this.renderActions() }
-
             <Events { ...events } accounts={ accounts.all } contacts={ contacts } actions={ actions.events } />
-            <p className={ styles.address }>
+            <div className={ styles.warning }>
-              The Registry is provided by the contract at <code>{ contract.address }.</code>
+              WARNING: The name registry is experimental. Please ensure that you understand the risks, benefits & consequences of registering a name before doing so. A non-refundable fee of { api.util.fromWei(fee).toFormat(3) }<small>ETH</small> is required for all registrations.
-            </p>
+            </div>
           </div>
         ) : (
           <CircularProgress size={ 60 } />

js/src/dapps/registry/addresses/actions.js

@@ -19,18 +19,16 @@ import { api } from '../parity';
 export const set = (addresses) => ({ type: 'addresses set', addresses });
 
 export const fetch = () => (dispatch) => {
-  return Promise
+  return api.parity
-    .all([
+    .accounts()
-      api.eth.accounts(),
+    .then((accountsInfo) => {
-      api.parity.accounts()
+      const addresses = Object
-    ])
+        .keys(accountsInfo)
-    .then(([ accounts, data ]) => {
+        .filter((address) => accountsInfo[address] && !accountsInfo[address].meta.deleted)
-      data = data || {};
-      const addresses = Object.keys(data)
-        .filter((address) => data[address] && !data[address].meta.deleted)
         .map((address) => ({
-          ...data[address], address,
+          ...accountsInfo[address],
-          isAccount: accounts.includes(address)
+          address,
+          isAccount: !!accountsInfo[address].uuid
         }));
       dispatch(set(addresses));
     })

js/src/dapps/signaturereg/Import/import.js

@@ -146,7 +146,7 @@ export default class Import extends Component {
   }
 
   sortFunctions = (a, b) => {
-    return a.name.localeCompare(b.name);
+    return (a.name || '').localeCompare(b.name || '');
   }
 
   countFunctions () {

js/src/dapps/signaturereg/services.js

@@ -49,26 +49,26 @@ export function attachInterface (callback) {
       return Promise
         .all([
           registry.getAddress.call({}, [api.util.sha3('signaturereg'), 'A']),
-          api.eth.accounts(),
           api.parity.accounts()
         ]);
     })
-    .then(([address, addresses, accountsInfo]) => {
+    .then(([address, accountsInfo]) => {
-      accountsInfo = accountsInfo || {};
       console.log(`signaturereg was found at ${address}`);
 
       const contract = api.newContract(abis.signaturereg, address);
-      const accounts = addresses.reduce((obj, address) => {
+      const accounts = Object
-        const info = accountsInfo[address] || {};
+        .keys(accountsInfo)
+        .filter((address) => accountsInfo[address].uuid)
+        .reduce((obj, address) => {
+          const info = accountsInfo[address] || {};
 
-        return Object.assign(obj, {
+          return Object.assign(obj, {
-          [address]: {
+            [address]: {
-            address,
+              address,
-            name: info.name || 'Unnamed',
+              name: info.name || 'Unnamed'
-            uuid: info.uuid
+            }
-          }
+          });
-        });
+        }, {});
-      }, {});
       const fromAddress = Object.keys(accounts)[0];
 
       return {

js/src/dapps/tokenreg/Accounts/AccountSelector/account-selector.js

@@ -70,7 +70,8 @@ export default class AccountSelector extends Component {
   static propTypes = {
     list: PropTypes.array.isRequired,
     selected: PropTypes.object.isRequired,
-    handleSetSelected: PropTypes.func.isRequired
+    handleSetSelected: PropTypes.func.isRequired,
+    onAccountChange: PropTypes.func
   };
 
   state = {
@@ -85,7 +86,8 @@ export default class AccountSelector extends Component {
         nestedItems={ nestedAccounts }
         open={ this.state.open }
         onSelectAccount={ this.onToggleOpen }
-        autoGenerateNestedIndicator={ false } />
+        autoGenerateNestedIndicator={ false }
+        nestedListStyle={ { maxHeight: '14em', overflow: 'auto' } } />
     );
 
     return (
@@ -110,6 +112,10 @@ export default class AccountSelector extends Component {
 
   onToggleOpen = () => {
     this.setState({ open: !this.state.open });
+
+    if (typeof this.props.onAccountChange === 'function') {
+      this.props.onAccountChange();
+    }
   }
 
   onSelectAccount = (address) => {

js/src/dapps/tokenreg/Accounts/actions.js

@@ -35,16 +35,13 @@ export const setSelectedAccount = (address) => ({
 });
 
 export const loadAccounts = () => (dispatch) => {
-  Promise
+  api.parity
-    .all([
+    .accounts()
-      api.eth.accounts(),
+    .then((accountsInfo) => {
-      api.parity.accounts()
+      const accountsList = Object
-    ])
+        .keys(accountsInfo)
-    .then(([ accounts, accountsInfo ]) => {
+        .filter((address) => accountsInfo[address].uuid)
-      accountsInfo = accountsInfo || {};
+        .map((address) => ({
-
-      const accountsList = accounts
-        .map(address => ({
           ...accountsInfo[address],
           address
         }));

js/src/dapps/tokenreg/Actions/Register/register.js

@@ -81,6 +81,7 @@ export default class RegisterAction extends Component {
         className={ styles.dialog }
         onRequestClose={ this.onClose }
         actions={ this.renderActions() }
+        ref='dialog'
         autoScrollBodyContent
       >
         { this.renderContent() }
@@ -149,7 +150,9 @@ export default class RegisterAction extends Component {
   renderForm () {
     return (
       <div>
-        <AccountSelector />
+        <AccountSelector
+          onAccountChange={ this.onAccountChange }
+        />
         { this.renderInputs() }
       </div>
     );
@@ -175,6 +178,11 @@ export default class RegisterAction extends Component {
     });
   }
 
+  onAccountChange = () => {
+    const { dialog } = this.refs;
+    dialog.forceUpdate();
+  }
+
   onChange (fieldKey, valid, value) {
     const { fields } = this.state;
     const field = fields[fieldKey];

js/src/dapps/tokenreg/Application/application.css

@@ -20,3 +20,15 @@
   flex-direction: column;
   align-items: center;
 }
+
+.warning {
+  background: #f80;
+  bottom: 0;
+  color: #fff;
+  left: 0;
+  opacity: 1;
+  padding: 1.5em;
+  position: fixed;
+  right: 50%;
+  z-index: 100;
+}

js/src/dapps/tokenreg/Application/application.js

@@ -17,6 +17,8 @@
 import React, { Component, PropTypes } from 'react';
 import getMuiTheme from 'material-ui/styles/getMuiTheme';
 
+import { api } from '../parity';
+
 import Loading from '../Loading';
 import Status from '../Status';
 import Tokens from '../Tokens';
@@ -59,6 +61,9 @@ export default class Application extends Component {
         <Actions />
 
         <Tokens />
+        <div className={ styles.warning }>
+          WARNING: The token registry is experimental. Please ensure that you understand the steps, risks, benefits & consequences of registering a token before doing so. A non-refundable fee of { api.util.fromWei(contract.fee).toFormat(3) }<small>ETH</small> is required for all registrations.
+        </div>
       </div>
     );
   }

js/src/dapps/tokenreg/Inputs/validation.js

@@ -75,7 +75,7 @@ const validateTokenAddress = (address, contract, simple) => {
 
   return getTokenTotalSupply(address)
     .then(balance => {
-      if (balance === null) {
+      if (balance === null || balance.equals(0)) {
         return {
           error: ERRORS.invalidTokenAddress,
           valid: false

js/src/dapps/tokenreg/Status/status.css

@@ -31,6 +31,12 @@
 .title {
   font-size: 3rem;
   font-weight: 300;
-  margin-top: 0;
+  margin: 0;
   text-transform: uppercase;
 }
+
+.byline {
+  font-size: 1.25em;
+  opacity: 0.75;
+  margin: 0 0 1.75em 0;
+}

js/src/dapps/tokenreg/Status/status.js

@@ -29,17 +29,12 @@ export default class Status extends Component {
   };
 
   render () {
-    const { address, fee } = this.props;
+    const { fee } = this.props;
 
     return (
       <div className={ styles.status }>
         <h1 className={ styles.title }>Token Registry</h1>
-
+        <h3 className={ styles.byline }>A global registry of all recognised tokens on the network</h3>
-        <Chip
-          isAddress
-          value={ address }
-          label='Address' />
-
         <Chip
           isAddress={ false }
           value={ api.util.fromWei(fee).toFixed(3) + 'ETH' }

js/src/dapps/tokenreg/Tokens/Token/token.js

@@ -57,6 +57,7 @@ export default class Token extends Component {
     isLoading: PropTypes.bool,
     isPending: PropTypes.bool,
     isTokenOwner: PropTypes.bool.isRequired,
+    isContractOwner: PropTypes.bool.isRequired,
 
     fullWidth: PropTypes.bool
   };
@@ -220,7 +221,7 @@ export default class Token extends Component {
   }
 
   renderUnregister () {
-    if (!this.props.isTokenOwner) {
+    if (!this.props.isContractOwner) {
       return null;
     }
 

js/src/dapps/tokenreg/Tokens/tokens.js

@@ -45,7 +45,7 @@ export default class Tokens extends Component {
   }
 
   renderTokens (tokens) {
-    const { accounts } = this.props;
+    const { accounts, isOwner } = this.props;
 
     return tokens.map((token, index) => {
       if (!token || !token.tla) {
@@ -61,7 +61,8 @@ export default class Tokens extends Component {
           handleMetaLookup={ this.props.handleMetaLookup }
           handleAddMeta={ this.props.handleAddMeta }
           key={ index }
-          isTokenOwner={ isTokenOwner } />
+          isTokenOwner={ isTokenOwner }
+          isContractOwner={ isOwner } />
       );
     });
   }

js/src/index.js

@@ -31,7 +31,7 @@ import ContractInstances from './contracts';
 
 import { initStore } from './redux';
 import { ContextProvider, muiTheme } from './ui';
-import { Accounts, Account, Addresses, Address, Application, Contract, Contracts, Dapp, Dapps, Settings, SettingsBackground, SettingsParity, SettingsProxy, SettingsViews, Signer, Status } from './views';
+import { Accounts, Account, Addresses, Address, Application, Contract, Contracts, WriteContract, Dapp, Dapps, Settings, SettingsBackground, SettingsParity, SettingsProxy, SettingsViews, Signer, Status } from './views';
 
 import { setApi } from './redux/providers/apiActions';
 
@@ -76,6 +76,7 @@ ReactDOM.render(
         <Route path='apps' component={ Dapps } />
         <Route path='app/:id' component={ Dapp } />
         <Route path='contracts' component={ Contracts } />
+        <Route path='contracts/write' component={ WriteContract } />
         <Route path='contract/:address' component={ Contract } />
         <Route path='settings' component={ Settings }>
           <Route path='background' component={ SettingsBackground } />

js/src/jsonrpc/interfaces/parity.js

@@ -109,6 +109,15 @@ export default {
     }
   },
 
+  dappsInterface: {
+    desc: 'Returns the interface the dapps are running on, error if not enabled',
+    params: [],
+    returns: {
+      type: String,
+      desc: 'The interface'
+    }
+  },
+
   defaultExtraData: {
     desc: 'Returns the default extra data',
     params: [],
@@ -347,6 +356,20 @@ export default {
     }
   },
 
+  nextNonce: {
+    desc: 'Returns next available nonce for transaction from given account. Includes pending block and transaction queue.',
+    params: [
+      {
+        type: Address,
+        desc: 'Account'
+      }
+    ],
+    returns: {
+      type: Quantity,
+      desc: 'Next valid nonce'
+    }
+  },
+
   nodeName: {
     desc: 'Returns node name (identity)',
     params: [],

js/src/jsonrpc/interfaces/signer.js

@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-import { Quantity } from '../types';
+import { Quantity, Data } from '../types';
 
 export default {
   generateAuthorizationToken: {
@@ -57,6 +57,24 @@ export default {
     }
   },
 
+  confirmRequestRaw: {
+    desc: 'Confirm a request in the signer queue providing signed request.',
+    params: [
+      {
+        type: Quantity,
+        desc: 'The request id'
+      },
+      {
+        type: Data,
+        desc: 'Signed request (transaction RLP)'
+      }
+    ],
+    returns: {
+      type: Boolean,
+      desc: 'The status of the confirmation'
+    }
+  },
+
   rejectRequest: {
     desc: 'Rejects a request in the signer queue',
     params: [

js/src/modals/AddContract/addContract.css

@@ -0,0 +1,32 @@
+/* Copyright 2015, 2016 Ethcore (UK) Ltd.
+/* This file is part of Parity.
+/*
+/* Parity is free software: you can redistribute it and/or modify
+/* it under the terms of the GNU General Public License as published by
+/* the Free Software Foundation, either version 3 of the License, or
+/* (at your option) any later version.
+/*
+/* Parity is distributed in the hope that it will be useful,
+/* but WITHOUT ANY WARRANTY; without even the implied warranty of
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+/* GNU General Public License for more details.
+/*
+/* You should have received a copy of the GNU General Public License
+/* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+.spaced {
+  margin: 0.25em 0;
+}
+
+.typeContainer {
+  display: flex;
+  flex-direction: column;
+
+  .desc {
+    font-size: 0.8em;
+    margin-bottom: 0.5em;
+    color: #ccc;
+    z-index: 2;
+  }
+}

js/src/modals/AddContract/addContract.js

@@ -17,10 +17,38 @@
 import React, { Component, PropTypes } from 'react';
 import ContentAdd from 'material-ui/svg-icons/content/add';
 import ContentClear from 'material-ui/svg-icons/content/clear';
+import NavigationArrowForward from 'material-ui/svg-icons/navigation/arrow-forward';
+import NavigationArrowBack from 'material-ui/svg-icons/navigation/arrow-back';
+
+import { RadioButton, RadioButtonGroup } from 'material-ui/RadioButton';
 
 import { Button, Modal, Form, Input, InputAddress } from '../../ui';
 import { ERRORS, validateAbi, validateAddress, validateName } from '../../util/validation';
 
+import { eip20, wallet } from '../../contracts/abi';
+import styles from './addContract.css';
+
+const ABI_TYPES = [
+  {
+    label: 'Token', readOnly: true, value: JSON.stringify(eip20),
+    type: 'token',
+    description: (<span>A standard <a href='https://github.com/ethereum/EIPs/issues/20' target='_blank'>ERC 20</a> token</span>)
+  },
+  {
+    label: 'Multisig Wallet', readOnly: true,
+    type: 'multisig',
+    value: JSON.stringify(wallet),
+    description: (<span>Official Multisig contract: <a href='https://github.com/ethereum/dapp-bin/blob/master/wallet/wallet.sol' target='_blank'>see contract code</a></span>)
+  },
+  {
+    label: 'Custom Contract', value: '',
+    type: 'custom',
+    description: 'Contract created from custom ABI'
+  }
+];
+
+const STEPS = [ 'choose a contract type', 'enter contract details' ];
+
 export default class AddContract extends Component {
   static contextTypes = {
     api: PropTypes.object.isRequired
@@ -34,44 +62,101 @@ export default class AddContract extends Component {
   state = {
     abi: '',
     abiError: ERRORS.invalidAbi,
+    abiType: ABI_TYPES[2],
+    abiTypeIndex: 2,
     abiParsed: null,
     address: '',
     addressError: ERRORS.invalidAddress,
     name: '',
     nameError: ERRORS.invalidName,
-    description: ''
+    description: '',
+    step: 0
   };
 
+  componentDidMount () {
+    this.onChangeABIType(null, this.state.abiTypeIndex);
+  }
+
   render () {
+    const { step } = this.state;
+
     return (
       <Modal
         visible
         actions={ this.renderDialogActions() }
-        title='watch contract'>
+        steps={ STEPS }
-        { this.renderFields() }
+        current={ step }
+      >
+        { this.renderStep(step) }
       </Modal>
     );
   }
 
+  renderStep (step) {
+    switch (step) {
+      case 0:
+        return this.renderContractTypeSelector();
+      default:
+        return this.renderFields();
+    }
+  }
+
+  renderContractTypeSelector () {
+    const { abiTypeIndex } = this.state;
+
+    return (
+      <RadioButtonGroup
+        valueSelected={ abiTypeIndex }
+        name='contractType'
+        onChange={ this.onChangeABIType }
+      >
+        { this.renderAbiTypes() }
+      </RadioButtonGroup>
+    );
+  }
+
   renderDialogActions () {
-    const { addressError, nameError } = this.state;
+    const { addressError, nameError, step } = this.state;
     const hasError = !!(addressError || nameError);
 
-    return ([
+    const cancelBtn = (
       <Button
         icon={ <ContentClear /> }
         label='Cancel'
-        onClick={ this.onClose } />,
+        onClick={ this.onClose } />
+    );
+
+    if (step === 0) {
+      const nextBtn = (
+        <Button
+          icon={ <NavigationArrowForward /> }
+          label='Next'
+          onClick={ this.onNext } />
+      );
+
+      return [ cancelBtn, nextBtn ];
+    }
+
+    const prevBtn = (
+      <Button
+        icon={ <NavigationArrowBack /> }
+        label='Back'
+        onClick={ this.onPrev } />
+    );
+
+    const addBtn = (
       <Button
         icon={ <ContentAdd /> }
         label='Add Contract'
         disabled={ hasError }
         onClick={ this.onAdd } />
-    ]);
+    );
+
+    return [ cancelBtn, prevBtn, addBtn ];
   }
 
   renderFields () {
-    const { abi, abiError, address, addressError, description, name, nameError } = this.state;
+    const { abi, abiError, address, addressError, description, name, nameError, abiType } = this.state;
 
     return (
       <Form>
@@ -80,7 +165,9 @@ export default class AddContract extends Component {
           hint='the network address for the contract'
           error={ addressError }
           value={ address }
-          onSubmit={ this.onEditAddress } />
+          onSubmit={ this.onEditAddress }
+          onChange={ this.onChangeAddress }
+        />
         <Input
           label='contract name'
           hint='a descriptive name for the contract'
@@ -94,20 +181,57 @@ export default class AddContract extends Component {
           hint='an expanded description for the entry'
           value={ description }
           onSubmit={ this.onEditDescription } />
+
         <Input
           label='contract abi'
           hint='the abi for the contract'
           error={ abiError }
           value={ abi }
-          onSubmit={ this.onEditAbi } />
+          readOnly={ abiType.readOnly }
+          onSubmit={ this.onEditAbi }
+        />
       </Form>
     );
   }
 
-  onEditAbi = (abi) => {
+  renderAbiTypes () {
-    const { api } = this.context;
+    return ABI_TYPES.map((type, index) => (
+      <RadioButton
+        className={ styles.spaced }
+        value={ index }
+        label={ (
+          <div className={ styles.typeContainer }>
+            <span>{ type.label }</span>
+            <span className={ styles.desc }>{ type.description }</span>
+          </div>
+        ) }
+        key={ index }
+      />
+    ));
+  }
 
-    this.setState(validateAbi(abi, api));
+  onNext = () => {
+    this.setState({ step: this.state.step + 1 });
+  }
+
+  onPrev = () => {
+    this.setState({ step: this.state.step - 1 });
+  }
+
+  onChangeABIType = (event, index) => {
+    const abiType = ABI_TYPES[index];
+    this.setState({ abiTypeIndex: index, abiType });
+    this.onEditAbi(abiType.value);
+  }
+
+  onEditAbi = (abiIn) => {
+    const { api } = this.context;
+    const { abi, abiError, abiParsed } = validateAbi(abiIn, api);
+    this.setState({ abi, abiError, abiParsed });
+  }
+
+  onChangeAddress = (event, value) => {
+    this.onEditAddress(value);
   }
 
   onEditAddress = (_address) => {
@@ -138,7 +262,7 @@ export default class AddContract extends Component {
 
   onAdd = () => {
     const { api } = this.context;
-    const { abiParsed, address, name, description } = this.state;
+    const { abiParsed, address, name, description, abiType } = this.state;
 
     Promise.all([
       api.parity.setAccountName(address, name),
@@ -147,6 +271,7 @@ export default class AddContract extends Component {
         deleted: false,
         timestamp: Date.now(),
         abi: abiParsed,
+        type: abiType.type,
         description
       })
     ]).catch((error) => {

js/src/modals/CreateAccount/AccountDetails/accountDetails.js

@@ -58,7 +58,7 @@ export default class AccountDetails extends Component {
         readOnly
         allowCopy
         hint='the account recovery phrase'
-        label='account recovery phrase (keep safe)'
+        label='owner recovery phrase (keep private and secure, it allows full and unlimited access to the account)'
         value={ phrase } />
     );
   }

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

@@ -25,7 +25,7 @@ import styles from '../deployContract.css';
 export default class DetailsStep extends Component {
   static contextTypes = {
     api: PropTypes.object.isRequired
-  }
+  };
 
   static propTypes = {
     accounts: PropTypes.object.isRequired,
@@ -46,16 +46,33 @@ export default class DetailsStep extends Component {
     onFromAddressChange: PropTypes.func.isRequired,
     onDescriptionChange: PropTypes.func.isRequired,
     onNameChange: PropTypes.func.isRequired,
-    onParamsChange: PropTypes.func.isRequired
+    onParamsChange: PropTypes.func.isRequired,
-  }
+    readOnly: PropTypes.bool
+  };
+
+  static defaultProps = {
+    readOnly: false
+  };
 
   state = {
     inputs: []
   }
 
+  componentDidMount () {
+    const { abi, code } = this.props;
+
+    if (abi) {
+      this.onAbiChange(abi);
+    }
+
+    if (code) {
+      this.onCodeChange(code);
+    }
+  }
+
   render () {
     const { accounts } = this.props;
-    const { abi, abiError, code, codeError, fromAddress, fromAddressError, name, nameError } = this.props;
+    const { abi, abiError, code, codeError, fromAddress, fromAddressError, name, nameError, readOnly } = this.props;
 
     return (
       <Form>
@@ -77,13 +94,15 @@ export default class DetailsStep extends Component {
           hint='the abi of the contract to deploy'
           error={ abiError }
           value={ abi }
-          onSubmit={ this.onAbiChange } />
+          onSubmit={ this.onAbiChange }
+          readOnly={ readOnly } />
         <Input
           label='code'
           hint='the compiled code of the contract to deploy'
           error={ codeError }
           value={ code }
-          onSubmit={ this.onCodeChange } />
+          onSubmit={ this.onCodeChange }
+          readOnly={ readOnly } />
         { this.renderConstructorInputs() }
       </Form>
     );

js/src/modals/DeployContract/deployContract.js

@@ -36,8 +36,17 @@ export default class DeployContract extends Component {
 
   static propTypes = {
     accounts: PropTypes.object.isRequired,
-    onClose: PropTypes.func.isRequired
+    onClose: PropTypes.func.isRequired,
-  }
+    abi: PropTypes.string,
+    code: PropTypes.string,
+    readOnly: PropTypes.bool,
+    source: PropTypes.string
+  };
+
+  static defaultProps = {
+    readOnly: false,
+    source: ''
+  };
 
   state = {
     abi: '',
@@ -57,6 +66,31 @@ export default class DeployContract extends Component {
     deployError: null
   }
 
+  componentWillMount () {
+    const { abi, code } = this.props;
+
+    if (abi && code) {
+      this.setState({ abi, code });
+    }
+  }
+
+  componentWillReceiveProps (nextProps) {
+    const { abi, code } = nextProps;
+    const newState = {};
+
+    if (abi !== this.props.abi) {
+      newState.abi = abi;
+    }
+
+    if (code !== this.props.code) {
+      newState.code = code;
+    }
+
+    if (Object.keys(newState).length) {
+      this.setState(newState);
+    }
+  }
+
   render () {
     const { step, deployError } = this.state;
 
@@ -115,7 +149,7 @@ export default class DeployContract extends Component {
   }
 
   renderStep () {
-    const { accounts } = this.props;
+    const { accounts, readOnly } = this.props;
     const { address, deployError, step, deployState, txhash } = this.state;
 
     if (deployError) {
@@ -129,6 +163,7 @@ export default class DeployContract extends Component {
         return (
           <DetailsStep
             { ...this.state }
+            readOnly={ readOnly }
             accounts={ accounts }
             onAbiChange={ this.onAbiChange }
             onCodeChange={ this.onCodeChange }
@@ -200,6 +235,7 @@ export default class DeployContract extends Component {
 
   onDeployStart = () => {
     const { api, store } = this.context;
+    const { source } = this.props;
     const { abiParsed, code, description, name, params, fromAddress } = this.state;
     const options = {
       data: code,
@@ -219,6 +255,7 @@ export default class DeployContract extends Component {
             contract: true,
             timestamp: Date.now(),
             deleted: false,
+            source,
             description
           })
         ])

js/src/modals/LoadContract/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 './loadContract';

js/src/modals/LoadContract/loadContract.css

@@ -0,0 +1,52 @@
+/* Copyright 2015, 2016 Ethcore (UK) Ltd.
+/* This file is part of Parity.
+/*
+/* Parity is free software: you can redistribute it and/or modify
+/* it under the terms of the GNU General Public License as published by
+/* the Free Software Foundation, either version 3 of the License, or
+/* (at your option) any later version.
+/*
+/* Parity is distributed in the hope that it will be useful,
+/* but WITHOUT ANY WARRANTY; without even the implied warranty of
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+/* GNU General Public License for more details.
+/*
+/* You should have received a copy of the GNU General Public License
+/* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+.loadContainer {
+  display: flex;
+  flex-direction: row;
+
+  > * {
+    flex: 50%;
+    width: 0;
+  }
+}
+
+.editor {
+  display: flex;
+  flex-direction: column;
+  padding-left: 1em;
+
+  p {
+    line-height: 48px;
+    height: 48px;
+    overflow: hidden;
+    white-space: nowrap;
+    text-overflow: ellipsis;
+
+    margin: 0;
+    font-size: 1.2em;
+  }
+}
+
+.confirmRemoval {
+  text-align: center;
+
+  .editor {
+    text-align: left;
+    margin-top: 0.5em;
+  }
+}

js/src/modals/LoadContract/loadContract.js

@@ -0,0 +1,284 @@
+// 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 ContentClear from 'material-ui/svg-icons/content/clear';
+import CheckIcon from 'material-ui/svg-icons/navigation/check';
+import DeleteIcon from 'material-ui/svg-icons/action/delete';
+
+import { List, ListItem, makeSelectable } from 'material-ui/List';
+import { Subheader, IconButton, Tabs, Tab } from 'material-ui';
+import moment from 'moment';
+
+import { Button, Modal, Editor } from '../../ui';
+
+import styles from './loadContract.css';
+
+const SelectableList = makeSelectable(List);
+
+const SELECTED_STYLE = {
+  backgroundColor: 'rgba(255, 255, 255, 0.1)'
+};
+
+export default class LoadContract extends Component {
+
+  static propTypes = {
+    onClose: PropTypes.func.isRequired,
+    onLoad: PropTypes.func.isRequired,
+    onDelete: PropTypes.func.isRequired,
+    contracts: PropTypes.object.isRequired,
+    snippets: PropTypes.object.isRequired
+  };
+
+  state = {
+    selected: -1,
+    deleteRequest: false,
+    deleteId: -1
+  };
+
+  render () {
+    const { deleteRequest } = this.state;
+
+    const title = deleteRequest
+      ? 'confirm removal'
+      : 'view contracts';
+
+    return (
+      <Modal
+        title={ title }
+        actions={ this.renderDialogActions() }
+        visible
+        scroll
+      >
+        { this.renderBody() }
+      </Modal>
+    );
+  }
+
+  renderBody () {
+    if (this.state.deleteRequest) {
+      return this.renderConfirmRemoval();
+    }
+
+    const { contracts, snippets } = this.props;
+
+    const contractsTab = Object.keys(contracts).length === 0
+      ? null
+      : (
+      <Tab label='Local' >
+        { this.renderEditor() }
+
+        <SelectableList
+          onChange={ this.onClickContract }
+        >
+          <Subheader>Saved Contracts</Subheader>
+          { this.renderContracts(contracts) }
+        </SelectableList>
+      </Tab>
+      );
+
+    return (
+      <div className={ styles.loadContainer }>
+        <Tabs onChange={ this.handleChangeTab }>
+          { contractsTab }
+
+          <Tab label='Snippets' >
+            { this.renderEditor() }
+
+            <SelectableList
+              onChange={ this.onClickContract }
+            >
+              <Subheader>Contract Snippets</Subheader>
+              { this.renderContracts(snippets, false) }
+            </SelectableList>
+          </Tab>
+        </Tabs>
+      </div>
+    );
+  }
+
+  renderConfirmRemoval () {
+    const { deleteId } = this.state;
+    const { name, timestamp, sourcecode } = this.props.contracts[deleteId];
+
+    return (
+      <div className={ styles.confirmRemoval }>
+        <p>
+          Are you sure you want to remove the following
+          contract from your saved contracts?
+        </p>
+        <ListItem
+          primaryText={ name }
+          secondaryText={ `Saved ${moment(timestamp).fromNow()}` }
+          style={ { backgroundColor: 'none', cursor: 'default' } }
+        />
+
+        <div className={ styles.editor }>
+          <Editor
+            value={ sourcecode }
+            maxLines={ 20 }
+            readOnly
+          />
+        </div>
+      </div>
+    );
+  }
+
+  renderEditor () {
+    const { contracts, snippets } = this.props;
+    const { selected } = this.state;
+
+    const mergedContracts = Object.assign({}, contracts, snippets);
+
+    if (selected === -1 || !mergedContracts[selected]) {
+      return null;
+    }
+
+    const { sourcecode, name } = mergedContracts[selected];
+
+    return (
+      <div className={ styles.editor }>
+        <p>{ name }</p>
+        <Editor
+          value={ sourcecode }
+          maxLines={ 20 }
+          readOnly
+        />
+      </div>
+    );
+  }
+
+  renderContracts (contracts, removable = true) {
+    const { selected } = this.state;
+
+    return Object
+      .values(contracts)
+      .map((contract) => {
+        const { id, name, timestamp, description } = contract;
+        const onDelete = () => this.onDeleteRequest(id);
+
+        const secondaryText = description || `Saved ${moment(timestamp).fromNow()}`;
+        const remove = removable
+          ? (
+          <IconButton onClick={ onDelete }>
+            <DeleteIcon />
+          </IconButton>
+          )
+          : null;
+
+        return (
+          <ListItem
+            value={ id }
+            key={ id }
+            primaryText={ name }
+            secondaryText={ secondaryText }
+            style={ selected === id ? SELECTED_STYLE : null }
+            rightIconButton={ remove }
+          />
+        );
+      });
+  }
+
+  renderDialogActions () {
+    const { deleteRequest } = this.state;
+
+    if (deleteRequest) {
+      return [
+        <Button
+          icon={ <ContentClear /> }
+          label='No'
+          key='No'
+          onClick={ this.onRejectRemoval }
+        />,
+        <Button
+          icon={ <DeleteIcon /> }
+          label='Yes'
+          key='Yes'
+          onClick={ this.onConfirmRemoval }
+        />
+      ];
+    }
+
+    const cancelBtn = (
+      <Button
+        icon={ <ContentClear /> }
+        label='Cancel'
+        onClick={ this.onClose }
+      />
+    );
+
+    const loadBtn = (
+      <Button
+        icon={ <CheckIcon /> }
+        label='Load'
+        onClick={ this.onLoad }
+        disabled={ this.state.selected === -1 }
+      />
+    );
+
+    return [ cancelBtn, loadBtn ];
+  }
+
+  handleChangeTab = () => {
+    this.setState({ selected: -1 });
+  }
+
+  onClickContract = (_, value) => {
+    this.setState({ selected: value });
+  }
+
+  onClose = () => {
+    this.props.onClose();
+  }
+
+  onLoad = () => {
+    const { contracts, snippets } = this.props;
+    const { selected } = this.state;
+
+    const mergedContracts = Object.assign({}, contracts, snippets);
+    const contract = mergedContracts[selected];
+
+    this.props.onLoad(contract);
+    this.props.onClose();
+  }
+
+  onDeleteRequest = (id) => {
+    this.setState({
+      deleteRequest: true,
+      deleteId: id
+    });
+  }
+
+  onConfirmRemoval = () => {
+    const { deleteId } = this.state;
+    this.props.onDelete(deleteId);
+
+    this.setState({
+      deleteRequest: false,
+      deleteId: -1,
+      selected: -1
+    });
+  }
+
+  onRejectRemoval = () => {
+    this.setState({
+      deleteRequest: false,
+      deleteId: -1
+    });
+  }
+
+}

js/src/modals/SaveContract/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 './saveContract';

js/src/modals/SaveContract/saveContract.css

@@ -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/>.
+*/
+
+.source {
+  margin-top: 2em;
+}

js/src/modals/SaveContract/saveContract.js

@@ -0,0 +1,109 @@
+// 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 SaveIcon from 'material-ui/svg-icons/content/save';
+import ContentClear from 'material-ui/svg-icons/content/clear';
+
+import { Button, Modal, Editor, Form, Input } from '../../ui';
+import { ERRORS, validateName } from '../../util/validation';
+
+import styles from './saveContract.css';
+
+export default class SaveContract extends Component {
+
+  static propTypes = {
+    sourcecode: PropTypes.string.isRequired,
+    onClose: PropTypes.func.isRequired,
+    onSave: PropTypes.func.isRequired
+  };
+
+  state = {
+    name: '',
+    nameError: ERRORS.invalidName
+  };
+
+  render () {
+    const { sourcecode } = this.props;
+    const { name, nameError } = this.state;
+
+    return (
+      <Modal
+        title='save contract'
+        actions={ this.renderDialogActions() }
+        visible
+      >
+        <div>
+          <Form>
+            <Input
+              label='contract name'
+              hint='choose a name for this contract'
+              value={ name }
+              error={ nameError }
+              onChange={ this.onChangeName }
+            />
+          </Form>
+          <Editor
+            className={ styles.source }
+            value={ sourcecode }
+            maxLines={ 20 }
+            readOnly
+          />
+        </div>
+      </Modal>
+    );
+  }
+
+  renderDialogActions () {
+    const cancelBtn = (
+      <Button
+        icon={ <ContentClear /> }
+        label='Cancel'
+        onClick={ this.onClose }
+      />
+    );
+
+    const confirmBtn = (
+      <Button
+        icon={ <SaveIcon /> }
+        label='Save'
+        disabled={ !!this.state.nameError }
+        onClick={ this.onSave }
+      />
+    );
+
+    return [ cancelBtn, confirmBtn ];
+  }
+
+  onClose = () => {
+    this.props.onClose();
+  }
+
+  onSave = () => {
+    const { name } = this.state;
+    const { sourcecode } = this.props;
+
+    this.props.onSave({ name, sourcecode });
+    this.onClose();
+  }
+
+  onChangeName = (event, value) => {
+    const { name, nameError } = validateName(value);
+    this.setState({ name, nameError });
+  }
+
+}