Merge branch 'master' of github.com:ethcore/parity into fatdb

Cargo.lock

@@ -20,7 +20,7 @@ dependencies = [
  "ethsync 1.3.0",
  "fdlimit 0.1.0",
  "hyper 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "json-ipc-server 0.2.3 (git+https://github.com/ethcore/json-ipc-server.git)",
+ "json-ipc-server 0.2.4 (git+https://github.com/ethcore/json-ipc-server.git)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "number_prefix 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -164,7 +164,7 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -261,6 +261,7 @@ dependencies = [
  "ethjson 0.1.0",
  "ethstore 0.1.0",
  "heapsize 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hyper 0.9.4 (git+https://github.com/ethcore/hyper)",
  "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -278,21 +279,21 @@ dependencies = [
  "clippy 0.0.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethcore-rpc 1.3.0",
  "ethcore-util 1.3.0",
- "hyper 0.9.3 (git+https://github.com/ethcore/hyper)",
+ "hyper 0.9.4 (git+https://github.com/ethcore/hyper)",
  "jsonrpc-core 2.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "jsonrpc-http-server 5.1.0 (git+https://github.com/ethcore/jsonrpc-http-server.git)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime_guess 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "parity-dapps 0.3.0 (git+https://github.com/ethcore/parity-dapps-rs.git)",
- "parity-dapps-builtins 0.5.1 (git+https://github.com/ethcore/parity-dapps-builtins-rs.git)",
+ "parity-dapps-builtins 0.5.2 (git+https://github.com/ethcore/parity-dapps-builtins-rs.git)",
- "parity-dapps-status 0.5.0 (git+https://github.com/ethcore/parity-dapps-status-rs.git)",
+ "parity-dapps-status 0.5.1 (git+https://github.com/ethcore/parity-dapps-status-rs.git)",
  "parity-dapps-wallet 0.6.1 (git+https://github.com/ethcore/parity-dapps-wallet-rs.git)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.7.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_codegen 0.7.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "syntex 0.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -344,7 +345,7 @@ dependencies = [
  "ethcore-util 1.3.0",
  "ethjson 0.1.0",
  "ethsync 1.3.0",
- "json-ipc-server 0.2.3 (git+https://github.com/ethcore/json-ipc-server.git)",
+ "json-ipc-server 0.2.4 (git+https://github.com/ethcore/json-ipc-server.git)",
  "jsonrpc-core 2.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "jsonrpc-http-server 5.1.0 (git+https://github.com/ethcore/jsonrpc-http-server.git)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -366,16 +367,17 @@ dependencies = [
  "ethcore-util 1.3.0",
  "jsonrpc-core 2.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "parity-minimal-sysui 0.1.0 (git+https://github.com/ethcore/parity-dapps-minimal-sysui-rs.git)",
+ "parity-minimal-sysui 0.2.0 (git+https://github.com/ethcore/parity-dapps-minimal-sysui-rs.git)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "ws 0.5.1 (git+https://github.com/ethcore/ws-rs.git)",
+ "ws 0.5.0 (git+https://github.com/ethcore/ws-rs.git?branch=stable)",
 ]
 
 [[package]]
 name = "ethcore-util"
 version = "1.3.0"
 dependencies = [
+ "ansi_term 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "arrayvec 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "bigint 0.1.0",
  "chrono 0.2.22 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -546,23 +548,22 @@ dependencies = [
 
 [[package]]
 name = "hyper"
-version = "0.9.3"
+version = "0.9.4"
-source = "git+https://github.com/ethcore/hyper#dbb4cf160ebf242f7f0459d547c40e9e6877ccf4"
+source = "git+https://github.com/ethcore/hyper#9e346c1d4bc30cd4142dea9d8a0b117d30858ca4"
 dependencies = [
  "cookie 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "httparse 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "language-tags 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rotor 0.6.3 (git+https://github.com/ethcore/rotor)",
- "rotor 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "spmc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "spmc 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "traitobject 0.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "typeable 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "vecio 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -595,8 +596,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "json-ipc-server"
-version = "0.2.3"
+version = "0.2.4"
-source = "git+https://github.com/ethcore/json-ipc-server.git#bfe16b66b2e9412d153b1ea53bc078d74037da7f"
+source = "git+https://github.com/ethcore/json-ipc-server.git#902b031b8f50a59ecb4f389cbec1d264a98556bc"
 dependencies = [
  "bytes 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -630,9 +631,9 @@ dependencies = [
 [[package]]
 name = "jsonrpc-http-server"
 version = "5.1.0"
-source = "git+https://github.com/ethcore/jsonrpc-http-server.git#0c99d308bc15e8fae50642eff77a3e1fd7610652"
+source = "git+https://github.com/ethcore/jsonrpc-http-server.git#e59c2fbaca499620874023755cb91f05b858ffe7"
 dependencies = [
- "hyper 0.9.3 (git+https://github.com/ethcore/hyper)",
+ "hyper 0.9.4 (git+https://github.com/ethcore/hyper)",
  "jsonrpc-core 2.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -712,26 +713,10 @@ dependencies = [
  "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "mio"
-version = "0.5.0"
-source = "git+https://github.com/carllerche/mio.git#f4aa49a9d2c4507fb33a4533d5238e0365f67c99"
-dependencies = [
- "bytes 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "miow 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "net2 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
- "nix 0.5.0-pre (git+https://github.com/carllerche/nix-rust?rev=c4257f8a76)",
- "slab 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "mio"
 version = "0.5.1"
-source = "git+https://github.com/ethcore/mio?branch=v0.5.x#1fc881771fb8c2517317b4f805d7b88235be422b"
+source = "git+https://github.com/ethcore/mio?branch=v0.5.x#3842d3b250ffd7bd9b16f9586b875ddcbac2b0dd"
 dependencies = [
  "bytes 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -801,15 +786,6 @@ dependencies = [
  "ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "nix"
-version = "0.5.0-pre"
-source = "git+https://github.com/carllerche/nix-rust?rev=c4257f8a76#c4257f8a76b69b0d2e9a001d83e4bef67c03b23f"
-dependencies = [
- "bitflags 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "nix"
 version = "0.5.0"
@@ -935,16 +911,16 @@ dependencies = [
 
 [[package]]
 name = "parity-dapps-builtins"
-version = "0.5.1"
+version = "0.5.2"
-source = "git+https://github.com/ethcore/parity-dapps-builtins-rs.git#7408838e8ca3b57c6b0cf5da2e31e0e275959955"
+source = "git+https://github.com/ethcore/parity-dapps-builtins-rs.git#01af2091d5d70dfe0aecbfd96308f0ae79fc61e6"
 dependencies = [
  "parity-dapps 0.3.0 (git+https://github.com/ethcore/parity-dapps-rs.git)",
 ]
 
 [[package]]
 name = "parity-dapps-status"
-version = "0.5.0"
+version = "0.5.1"
-source = "git+https://github.com/ethcore/parity-dapps-status-rs.git#0cdd3512004e403aff7da3b8c16ba0bf5d6c911c"
+source = "git+https://github.com/ethcore/parity-dapps-status-rs.git#110ef2e66142ec8dc15fc40b8ddda5ed3bcfc1fb"
 dependencies = [
  "parity-dapps 0.3.0 (git+https://github.com/ethcore/parity-dapps-rs.git)",
 ]
@@ -959,8 +935,8 @@ dependencies = [
 
 [[package]]
 name = "parity-minimal-sysui"
-version = "0.1.0"
+version = "0.2.0"
-source = "git+https://github.com/ethcore/parity-dapps-minimal-sysui-rs.git#cc5ea4bd786982f0509a8d3d5deb4217c659af85"
+source = "git+https://github.com/ethcore/parity-dapps-minimal-sysui-rs.git#996c9f3f0ebedc727aecb4ece191154e956ae292"
 
 [[package]]
 name = "phf"
@@ -1057,7 +1033,7 @@ dependencies = [
 
 [[package]]
 name = "quick-error"
-version = "0.2.2"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1103,7 +1079,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "rocksdb"
 version = "0.4.5"
-source = "git+https://github.com/ethcore/rust-rocksdb#6f3c68f5f075433d206be4af6a620651cd9f8541"
+source = "git+https://github.com/ethcore/rust-rocksdb#9be41e05923616dfa28741c58b22776d479751e6"
 dependencies = [
  "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "rocksdb-sys 0.3.0 (git+https://github.com/ethcore/rust-rocksdb)",
@@ -1112,7 +1088,7 @@ dependencies = [
 [[package]]
 name = "rocksdb-sys"
 version = "0.3.0"
-source = "git+https://github.com/ethcore/rust-rocksdb#6f3c68f5f075433d206be4af6a620651cd9f8541"
+source = "git+https://github.com/ethcore/rust-rocksdb#9be41e05923616dfa28741c58b22776d479751e6"
 dependencies = [
  "gcc 0.3.28 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1121,12 +1097,11 @@ dependencies = [
 [[package]]
 name = "rotor"
 version = "0.6.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
+source = "git+https://github.com/ethcore/rotor#e63d45137b2eb66d1e085a7c6321a5db8b187576"
 dependencies = [
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "mio 0.5.1 (git+https://github.com/ethcore/mio?branch=v0.5.x)",
- "quick-error 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quick-error 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1249,7 +1224,7 @@ dependencies = [
 
 [[package]]
 name = "spmc"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1408,7 +1383,7 @@ dependencies = [
 
 [[package]]
 name = "url"
-version = "1.0.0"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "idna 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1472,16 +1447,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "ws"
-version = "0.5.1"
+version = "0.5.0"
-source = "git+https://github.com/ethcore/ws-rs.git#d5745df8ea1ab82cd2b844f15ca1ac759e7aa9f5"
+source = "git+https://github.com/ethcore/ws-rs.git?branch=stable#a876fc115c3ef50a17c8822c9bd2f6e94473e005"
 dependencies = [
  "httparse 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.5.0 (git+https://github.com/carllerche/mio.git)",
+ "mio 0.5.1 (git+https://github.com/ethcore/mio?branch=v0.5.x)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha1 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "slab 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]

appveyor.yml

@@ -1,13 +1,27 @@
 environment:
   matrix:
   - TARGET: x86_64-pc-windows-msvc
+  cert:
+    secure: ESPpYVVAMG1fbJx6kq4ct/g9SQTXac4Hs6xXr6Oh4Zrk2dwYglNjxmzErdPnvu7gs/gekzrJ6KEQHYRc+5+4dKg6rRADQ681NLVx9vOggBs=
+  certpass:
+    secure: 0BgXJqxq9Ei34/hZ7121FQ==
+  keyfile: C:\users\appveyor\Certificates.p12
+
+branches:
+  only:
+    - master
+    - /^beta-.*$/
+    - /^stable-.*$/
+    - /^beta$/
+    - /^stable$/
+
 install:
   - git submodule update --init --recursive
   - ps: Start-FileDownload "https://static.rust-lang.org/dist/rust-1.9.0-x86_64-pc-windows-msvc.exe"
   - ps: Start-FileDownload "https://github.com/ethcore/win-build/raw/master/SimpleFC.dll" -FileName nsis\SimpleFC.dll
   - ps: Start-FileDownload "https://github.com/ethcore/win-build/raw/master/vc_redist.x64.exe" -FileName nsis\vc_redist.x64.exe
   - rust-1.9.0-x86_64-pc-windows-msvc.exe /VERYSILENT /NORESTART /DIR="C:\Program Files (x86)\Rust"
-  - SET PATH=%PATH%;C:\Program Files (x86)\Rust\bin;C:\Program Files (x86)\NSIS
+  - SET PATH=%PATH%;C:\Program Files (x86)\Rust\bin;C:\Program Files (x86)\NSIS;C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A\Bin
   - rustc -V
   - cargo -V
 
@@ -18,7 +32,10 @@ test_script:
 
 after_test:
   - cargo build --verbose --release
+  - ps: if($env:cert) { Start-FileDownload $env:cert -FileName $env:keyfile }
+  - ps: if($env:cert) { signtool sign /f $env:keyfile /p $env:certpass target\release\parity.exe }
   - makensis.exe nsis\installer.nsi
+  - ps: if($env:cert) { signtool sign /f $env:keyfile /p $env:certpass nsis\installer.exe }
 
 artifacts:
   - path: nsis\installer.exe

dapps/Cargo.toml

@@ -22,8 +22,8 @@ ethcore-rpc = { path = "../rpc" }
 ethcore-util = { path = "../util" }
 parity-dapps = { git = "https://github.com/ethcore/parity-dapps-rs.git", version = "0.3" }
 # List of apps
-parity-dapps-status = { git = "https://github.com/ethcore/parity-dapps-status-rs.git", version = "0.5.0" }
+parity-dapps-status = { git = "https://github.com/ethcore/parity-dapps-status-rs.git", version = "0.5.1" }
-parity-dapps-builtins = { git = "https://github.com/ethcore/parity-dapps-builtins-rs.git", version = "0.5.0" }
+parity-dapps-builtins = { git = "https://github.com/ethcore/parity-dapps-builtins-rs.git", version = "0.5.2" }
 parity-dapps-wallet = { git = "https://github.com/ethcore/parity-dapps-wallet-rs.git", version = "0.6.0", optional = true }
 parity-dapps-dao = { git = "https://github.com/ethcore/parity-dapps-dao-rs.git", version = "0.4.0", optional = true }
 parity-dapps-makerotc = { git = "https://github.com/ethcore/parity-dapps-makerotc-rs.git", version = "0.3.0", optional = true }

dapps/src/endpoint.rs

@@ -42,11 +42,11 @@ pub struct EndpointInfo {
 pub trait Endpoint : Send + Sync {
 	fn info(&self) -> Option<&EndpointInfo> { None }
 
-	fn to_handler(&self, path: EndpointPath) -> Box<server::Handler<HttpStream>>;
+	fn to_handler(&self, path: EndpointPath) -> Box<server::Handler<HttpStream> + Send>;
 }
 
 pub type Endpoints = BTreeMap<String, Box<Endpoint>>;
-pub type Handler = server::Handler<HttpStream>;
+pub type Handler = server::Handler<HttpStream> + Send;
 
 pub struct ContentHandler {
 	content: String,
@@ -65,7 +65,7 @@ impl ContentHandler {
 }
 
 impl server::Handler<HttpStream> for ContentHandler {
-	fn on_request(&mut self, _request: server::Request) -> Next {
+	fn on_request(&mut self, _request: server::Request<HttpStream>) -> Next {
 		Next::write()
 	}
 

dapps/src/lib.rs

@@ -132,9 +132,16 @@ impl Server {
 				special.clone(),
 				authorization.clone(),
 			))
-			.map(|l| Server {
+			.map(|(l, srv)| {
+
+				::std::thread::spawn(move || {
+					srv.run();
+				});
+
+				Server {
 					server: Some(l),
 					panic_handler: panic_handler,
+				}
 			})
 			.map_err(ServerError::from)
 	}

dapps/src/page/handler.rs

@@ -86,7 +86,7 @@ impl<T: Dapp> PageHandler<T> {
 }
 
 impl<T: Dapp> server::Handler<HttpStream> for PageHandler<T> {
-	fn on_request(&mut self, req: server::Request) -> Next {
+	fn on_request(&mut self, req: server::Request<HttpStream>) -> Next {
 		self.file = match *req.uri() {
 			RequestUri::AbsolutePath(ref path) => {
 				self.app.file(&self.extract_path(path))

dapps/src/router/auth.rs

@@ -27,13 +27,13 @@ pub enum Authorized {
 	/// Authorization was successful.
 	Yes,
 	/// Unsuccessful authorization. Handler for further work is returned.
-	No(Box<server::Handler<HttpStream>>),
+	No(Box<server::Handler<HttpStream> + Send>),
 }
 
 /// Authorization interface
 pub trait Authorization : Send + Sync {
 	/// Checks if authorization is valid.
-	fn is_authorized(&self, req: &server::Request)-> Authorized;
+	fn is_authorized(&self, req: &server::Request<HttpStream>)-> Authorized;
 }
 
 /// HTTP Basic Authorization handler
@@ -45,13 +45,13 @@ pub struct HttpBasicAuth {
 pub struct NoAuth;
 
 impl Authorization for NoAuth {
-	fn is_authorized(&self, _req: &server::Request)-> Authorized {
+	fn is_authorized(&self, _req: &server::Request<HttpStream>)-> Authorized {
 		Authorized::Yes
 	}
 }
 
 impl Authorization for HttpBasicAuth {
-	fn is_authorized(&self, req: &server::Request) -> Authorized {
+	fn is_authorized(&self, req: &server::Request<HttpStream>) -> Authorized {
 		let auth = self.check_auth(&req);
 
 		match auth {
@@ -89,7 +89,7 @@ impl HttpBasicAuth {
 		self.users.get(&username.to_owned()).map_or(false, |pass| pass == password)
 	}
 
-	fn check_auth(&self, req: &server::Request) -> Access {
+	fn check_auth(&self, req: &server::Request<HttpStream>) -> Access {
 		match req.headers().get::<header::Authorization<header::Basic>>() {
 			Some(&header::Authorization(
 				header::Basic { ref username, password: Some(ref password) }
@@ -105,7 +105,7 @@ pub struct UnauthorizedHandler {
 }
 
 impl server::Handler<HttpStream> for UnauthorizedHandler {
-	fn on_request(&mut self, _request: server::Request) -> Next {
+	fn on_request(&mut self, _request: server::Request<HttpStream>) -> Next {
 		Next::write()
 	}
 
@@ -141,7 +141,7 @@ impl server::Handler<HttpStream> for UnauthorizedHandler {
 pub struct AuthRequiredHandler;
 
 impl server::Handler<HttpStream> for AuthRequiredHandler {
-	fn on_request(&mut self, _request: server::Request) -> Next {
+	fn on_request(&mut self, _request: server::Request<HttpStream>) -> Next {
 		Next::write()
 	}
 

dapps/src/router/mod.rs

@@ -49,12 +49,12 @@ pub struct Router<A: Authorization + 'static> {
 	endpoints: Arc<Endpoints>,
 	special: Arc<HashMap<SpecialEndpoint, Box<Endpoint>>>,
 	authorization: Arc<A>,
-	handler: Box<server::Handler<HttpStream>>,
+	handler: Box<server::Handler<HttpStream> + Send>,
 }
 
 impl<A: Authorization + 'static> server::Handler<HttpStream> for Router<A> {
 
-	fn on_request(&mut self, req: server::Request) -> Next {
+	fn on_request(&mut self, req: server::Request<HttpStream>) -> Next {
 		// Check authorization
 		let auth = self.authorization.is_authorized(&req);
 
@@ -124,7 +124,7 @@ impl<A: Authorization> Router<A> {
 	}
 }
 
-fn extract_url(req: &server::Request) -> Option<Url> {
+fn extract_url(req: &server::Request<HttpStream>) -> Option<Url> {
 	match *req.uri() {
 		uri::RequestUri::AbsoluteUri(ref url) => {
 			match Url::from_generic_url(url.clone()) {

dapps/src/router/redirect.rs

@@ -33,7 +33,7 @@ impl Redirection {
 }
 
 impl server::Handler<HttpStream> for Redirection {
-	fn on_request(&mut self, _request: server::Request) -> Next {
+	fn on_request(&mut self, _request: server::Request<HttpStream>) -> Next {
 		Next::write()
 	}
 

docker/centos/Dockerfile

@@ -20,6 +20,8 @@ g++ -v
 # build parity
 RUN git clone https://github.com/ethcore/parity && \
 	cd parity&&\
+	git checkout beta && \
+        git pull && \
         ls -a&&\
         cargo build --release --verbose && \
 	ls /build/parity/target/release/parity &&	\

docker/ubuntu-aarch64/Dockerfile

@@ -36,6 +36,8 @@ ENV CC aarch64-linux-gnu-gcc
 # build parity
 RUN git clone https://github.com/ethcore/parity && \
         cd parity && \
+        git checkout beta && \
+        git pull && \
         mkdir -p .cargo && \
         echo '[target.aarch64-unknown-linux-gnu]\n\
         linker = "aarch64-linux-gnu-gcc"\n'\

docker/ubuntu-arm/Dockerfile

@@ -36,6 +36,8 @@ ENV CC arm-linux-gnueabihf-gcc
 # build parity
 RUN git clone https://github.com/ethcore/parity && \
         cd parity && \
+        git checkout beta && \
+        git pull && \
         mkdir -p .cargo && \
         echo '[target.armv7-unknown-linux-gnueabihf]\n\
         linker = "arm-linux-gnueabihf-gcc"\n'\

docker/ubuntu-jit/Dockerfile

@@ -47,6 +47,8 @@ g++ -v
 # build parity
 RUN git clone https://github.com/ethcore/parity && \
         cd parity && \
+        git checkout beta && \
+        git pull && \
         cargo build --release --features ethcore/jit --verbose && \
         ls /build/parity/target/release/parity &&       \
         strip /build/parity/target/release/parity

docker/ubuntu/Dockerfile

@@ -27,6 +27,8 @@ g++ -v
 # build parity
 RUN git clone https://github.com/ethcore/parity && \
         cd parity && \
+        git checkout beta && \
+        git pull && \
         cargo build --release --verbose && \
         ls /build/parity/target/release/parity && \
         strip /build/parity/target/release/parity

ethcore/Cargo.toml

@@ -32,6 +32,10 @@ bloomchain = "0.1"
 rayon = "0.3.1"
 ethstore = { path = "../ethstore" }
 
+[dependencies.hyper]
+git = "https://github.com/ethcore/hyper"
+default-features = false
+
 [features]
 jit = ["evmjit"]
 evm-debug = []

ethcore/src/account.rs

@@ -108,6 +108,12 @@ impl Account {
 		self.code_cache = code;
 	}
 
+	/// Reset this account's code to the given code.
+	pub fn reset_code(&mut self, code: Bytes) {
+		self.code_hash = None;
+		self.init_code(code);
+	}
+
 	/// Set (and cache) the contents of the trie's storage at `key` to `value`.
 	pub fn set_storage(&mut self, key: H256, value: H256) {
 		self.storage_overlay.borrow_mut().insert(key, (Filth::Dirty, value));
@@ -336,6 +342,21 @@ mod tests {
 		assert_eq!(a.code_hash().hex(), "af231e631776a517ca23125370d542873eca1fb4d613ed9b5d5335a46ae5b7eb");
 	}
 
+	#[test]
+	fn reset_code() {
+		let mut a = Account::new_contract(69.into(), 0.into());
+		let mut db = MemoryDB::new();
+		let mut db = AccountDBMut::new(&mut db, &Address::new());
+		a.init_code(vec![0x55, 0x44, 0xffu8]);
+		assert_eq!(a.code_hash(), SHA3_EMPTY);
+		a.commit_code(&mut db);
+		assert_eq!(a.code_hash().hex(), "af231e631776a517ca23125370d542873eca1fb4d613ed9b5d5335a46ae5b7eb");
+		a.reset_code(vec![0x55]);
+		assert_eq!(a.code_hash(), SHA3_EMPTY);
+		a.commit_code(&mut db);
+		assert_eq!(a.code_hash().hex(), "37bf2238b11b68cdc8382cece82651b59d3c3988873b6e0f33d79694aa45f1be");
+	}
+
 	#[test]
 	fn rlpio() {
 		let a = Account::new(U256::from(69u8), U256::from(0u8), HashMap::new(), Bytes::new());
@@ -348,7 +369,6 @@ mod tests {
 
 	#[test]
 	fn new_account() {
-
 		let a = Account::new(U256::from(69u8), U256::from(0u8), HashMap::new(), Bytes::new());
 		assert_eq!(a.rlp().to_hex(), "f8448045a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421a0c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470");
 		assert_eq!(a.balance(), &U256::from(69u8));
@@ -359,7 +379,6 @@ mod tests {
 
 	#[test]
 	fn create_account() {
-
 		let a = Account::new(U256::from(69u8), U256::from(0u8), HashMap::new(), Bytes::new());
 		assert_eq!(a.rlp().to_hex(), "f8448045a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421a0c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470");
 	}

ethcore/src/block.rs

@@ -164,6 +164,12 @@ pub trait IsBlock {
 	fn uncles(&self) -> &Vec<Header> { &self.block().base.uncles }
 }
 
+/// Trait for a object that has a state database.
+pub trait Drain {
+	/// Drop this object and return the underlieing database.
+	fn drain(self) -> Box<JournalDB>;
+}
+
 impl IsBlock for ExecutedBlock {
 	fn block(&self) -> &ExecutedBlock { self }
 }
@@ -436,9 +442,11 @@ impl LockedBlock {
 			_ => Ok(SealedBlock { block: s.block, uncle_bytes: s.uncle_bytes }),
 		}
 	}
+}
 
+impl Drain for LockedBlock {
 	/// Drop this object and return the underlieing database.
-	pub fn drain(self) -> Box<JournalDB> { self.block.state.drop().1 }
+	fn drain(self) -> Box<JournalDB> { self.block.state.drop().1 }
 }
 
 impl SealedBlock {
@@ -450,9 +458,11 @@ impl SealedBlock {
 		block_rlp.append_raw(&self.uncle_bytes, 1);
 		block_rlp.out()
 	}
+}
 
+impl Drain for SealedBlock {
 	/// Drop this object and return the underlieing database.
-	pub fn drain(self) -> Box<JournalDB> { self.block.state.drop().1 }
+	fn drain(self) -> Box<JournalDB> { self.block.state.drop().1 }
 }
 
 impl IsBlock for SealedBlock {

ethcore/src/client/client.rs

@@ -16,7 +16,6 @@
 
 //! Blockchain database client.
 
-use std::marker::PhantomData;
 use std::path::PathBuf;
 use std::sync::atomic::{AtomicUsize, Ordering as AtomicOrdering};
 use util::*;
@@ -30,7 +29,8 @@ use engine::Engine;
 use views::HeaderView;
 use service::{NetSyncMessage, SyncMessage};
 use env_info::LastHashes;
-use verification::*;
+use verification;
+use verification::{PreverifiedBlock, Verifier};
 use block::*;
 use transaction::{LocalizedTransaction, SignedTransaction, Action};
 use blockchain::extras::TransactionAddress;
@@ -38,7 +38,7 @@ use filter::Filter;
 use log_entry::LocalizedLogEntry;
 use block_queue::{BlockQueue, BlockQueueInfo};
 use blockchain::{BlockChain, BlockProvider, TreeRoute, ImportRoute};
-use client::{BlockID, TransactionID, UncleID, TraceId, ClientConfig, BlockChainClient, MiningBlockChainClient, TraceFilter, CallAnalytics};
+use client::{BlockID, TransactionID, UncleID, TraceId, ClientConfig, DatabaseCompactionProfile, BlockChainClient, MiningBlockChainClient, TraceFilter, CallAnalytics};
 use client::Error as ClientError;
 use env_info::EnvInfo;
 use executive::{Executive, Executed, TransactOptions, contract_address};
@@ -83,7 +83,7 @@ impl ClientReport {
 
 /// Blockchain database client backed by a persistent database. Owns and manages a blockchain and a block queue.
 /// Call `import_block()` to import a block asynchronously; `flush_queue()` flushes the queue.
-pub struct Client<V = CanonVerifier> where V: Verifier {
+pub struct Client {
 	chain: Arc<BlockChain>,
 	tracedb: Arc<TraceDB<BlockChain>>,
 	engine: Arc<Box<Engine>>,
@@ -92,7 +92,7 @@ pub struct Client<V = CanonVerifier> where V: Verifier {
 	report: RwLock<ClientReport>,
 	import_lock: Mutex<()>,
 	panic_handler: Arc<PanicHandler>,
-	verifier: PhantomData<V>,
+	verifier: Box<Verifier>,
 	vm_factory: Arc<EvmFactory>,
 	miner: Arc<Miner>,
 	io_channel: IoChannel<NetSyncMessage>,
@@ -107,13 +107,6 @@ const HISTORY: u64 = 1200;
 // of which you actually want force an upgrade.
 const CLIENT_DB_VER_STR: &'static str = "5.3";
 
-impl Client<CanonVerifier> {
-	/// Create a new client with given spec and DB path.
-	pub fn new(config: ClientConfig, spec: Spec, path: &Path, miner: Arc<Miner>, message_channel: IoChannel<NetSyncMessage> ) -> Result<Arc<Client>, ClientError> {
-		Client::<CanonVerifier>::new_with_verifier(config, spec, path, miner, message_channel)
-	}
-}
-
 /// Get the path for the databases given the root path and information on the databases.
 pub fn get_db_path(path: &Path, pruning: journaldb::Algorithm, genesis_hash: H256) -> PathBuf {
 	let mut dir = path.to_path_buf();
@@ -131,25 +124,35 @@ pub fn append_path(path: &Path, item: &str) -> String {
 	p.to_str().unwrap().to_owned()
 }
 
-impl<V> Client<V> where V: Verifier {
+impl Client {
 	///  Create a new client with given spec and DB path and custom verifier.
-	pub fn new_with_verifier(
+	pub fn new(
 		config: ClientConfig,
 		spec: Spec,
 		path: &Path,
 		miner: Arc<Miner>,
 		message_channel: IoChannel<NetSyncMessage>)
-		-> Result<Arc<Client<V>>, ClientError>
+		-> Result<Arc<Client>, ClientError>
 	{
 		let path = get_db_path(path, config.pruning, spec.genesis_header().hash());
 		let gb = spec.genesis_block();
 		let chain = Arc::new(BlockChain::new(config.blockchain, &gb, &path));
 		let tracedb = Arc::new(try!(TraceDB::new(config.tracing, &path, chain.clone())));
 
+		let mut state_db_config = match config.db_cache_size {
+			None => DatabaseConfig::default(),
+			Some(cache_size) => DatabaseConfig::with_cache(cache_size),
+		};
+
+		if config.db_compaction == DatabaseCompactionProfile::HDD {
+			state_db_config = state_db_config.compaction(CompactionProfile::hdd());
+		}
+
 		let mut state_db = journaldb::new(
 			&append_path(&path, "state"),
 			config.pruning,
-			config.db_cache_size);
+			state_db_config
+		);
 
 		if state_db.is_empty() && spec.ensure_db_good(state_db.as_hashdb_mut()) {
 			state_db.commit(0, &spec.genesis_header().hash(), None).expect("Error commiting genesis state to state DB");
@@ -170,7 +173,7 @@ impl<V> Client<V> where V: Verifier {
 			report: RwLock::new(Default::default()),
 			import_lock: Mutex::new(()),
 			panic_handler: panic_handler,
-			verifier: PhantomData,
+			verifier: verification::new(config.verifier_type),
 			vm_factory: Arc::new(EvmFactory::new(config.vm_type)),
 			miner: miner,
 			io_channel: message_channel,
@@ -212,7 +215,7 @@ impl<V> Client<V> where V: Verifier {
 		}
 
 		// Verify Block Family
-		let verify_family_result = V::verify_block_family(&header, &block.bytes, engine, self.chain.deref());
+		let verify_family_result = self.verifier.verify_block_family(&header, &block.bytes, engine, self.chain.deref());
 		if let Err(e) = verify_family_result {
 			warn!(target: "client", "Stage 3 block verification failed for #{} ({})\nError: {:?}", header.number(), header.hash(), e);
 			return Err(());
@@ -238,7 +241,7 @@ impl<V> Client<V> where V: Verifier {
 
 		// Final Verification
 		let locked_block = enact_result.unwrap();
-		if let Err(e) = V::verify_block_final(&header, locked_block.block().header()) {
+		if let Err(e) = self.verifier.verify_block_final(&header, locked_block.block().header()) {
 			warn!(target: "client", "Stage 4 block verification failed for #{} ({})\nError: {:?}", header.number(), header.hash(), e);
 			return Err(());
 		}
@@ -246,7 +249,7 @@ impl<V> Client<V> where V: Verifier {
 		Ok(locked_block)
 	}
 
-	fn calculate_enacted_retracted(&self, import_results: Vec<ImportRoute>) -> (Vec<H256>, Vec<H256>) {
+	fn calculate_enacted_retracted(&self, import_results: &[ImportRoute]) -> (Vec<H256>, Vec<H256>) {
 		fn map_to_vec(map: Vec<(H256, bool)>) -> Vec<H256> {
 			map.into_iter().map(|(k, _v)| k).collect()
 		}
@@ -256,12 +259,12 @@ impl<V> Client<V> where V: Verifier {
 		// could be retracted in import `k+1`. This is why to understand if after all inserts
 		// the block is enacted or retracted we iterate over all routes and at the end final state
 		// will be in the hashmap
-		let map = import_results.into_iter().fold(HashMap::new(), |mut map, route| {
+		let map = import_results.iter().fold(HashMap::new(), |mut map, route| {
-			for hash in route.enacted {
+			for hash in &route.enacted {
-				map.insert(hash, true);
+				map.insert(hash.clone(), true);
 			}
-			for hash in route.retracted {
+			for hash in &route.retracted {
-				map.insert(hash, false);
+				map.insert(hash.clone(), false);
 			}
 			map
 		});
@@ -296,38 +299,12 @@ impl<V> Client<V> where V: Verifier {
 			let closed_block = self.check_and_close_block(&block);
 			if let Err(_) = closed_block {
 				invalid_blocks.insert(header.hash());
-				break;
+				continue;
 			}
+			let closed_block = closed_block.unwrap();
 			imported_blocks.push(header.hash());
 
-			// Are we committing an era?
+			let route = self.commit_block(closed_block, &header.hash(), &block.bytes);
-			let ancient = if header.number() >= HISTORY {
-				let n = header.number() - HISTORY;
-				Some((n, self.chain.block_hash(n).unwrap()))
-			} else {
-				None
-			};
-
-			// Commit results
-			let closed_block = closed_block.unwrap();
-			let receipts = closed_block.block().receipts().clone();
-			let traces = From::from(closed_block.block().traces().clone().unwrap_or_else(Vec::new));
-
-			closed_block.drain()
-				.commit(header.number(), &header.hash(), ancient)
-				.expect("State DB commit failed.");
-
-			// And update the chain after commit to prevent race conditions
-			// (when something is in chain but you are not able to fetch details)
-			let route = self.chain.insert_block(&block.bytes, receipts);
-			self.tracedb.import(TraceImportRequest {
-				traces: traces,
-				block_hash: header.hash(),
-				block_number: header.number(),
-				enacted: route.enacted.clone(),
-				retracted: route.retracted.len()
-			});
-
 			import_results.push(route);
 
 			self.report.write().unwrap().accrue_block(&block);
@@ -348,7 +325,7 @@ impl<V> Client<V> where V: Verifier {
 
 		{
 			if !imported_blocks.is_empty() && self.block_queue.queue_info().is_empty() {
-				let (enacted, retracted) = self.calculate_enacted_retracted(import_results);
+				let (enacted, retracted) = self.calculate_enacted_retracted(&import_results);
 
 				if self.queue_info().is_empty() {
 					self.miner.chain_new_blocks(self, &imported_blocks, &invalid_blocks, &enacted, &retracted);
@@ -359,19 +336,50 @@ impl<V> Client<V> where V: Verifier {
 					invalid: invalid_blocks,
 					enacted: enacted,
 					retracted: retracted,
-				})).unwrap();
+					sealed: Vec::new(),
+				})).unwrap_or_else(|e| warn!("Error sending IO notification: {:?}", e));
 			}
 		}
 
-		{
 		if self.chain_info().best_block_hash != original_best {
 			self.miner.update_sealing(self);
 		}
-		}
 
 		imported
 	}
 
+	fn commit_block<B>(&self, block: B, hash: &H256, block_data: &Bytes) -> ImportRoute where B: IsBlock + Drain {
+		let number = block.header().number();
+		// Are we committing an era?
+		let ancient = if number >= HISTORY {
+			let n = number - HISTORY;
+			Some((n, self.chain.block_hash(n).unwrap()))
+		} else {
+			None
+		};
+
+		// Commit results
+		let receipts = block.receipts().clone();
+		let traces = From::from(block.traces().clone().unwrap_or_else(Vec::new));
+
+		// CHECK! I *think* this is fine, even if the state_root is equal to another
+		// already-imported block of the same number.
+		// TODO: Prove it with a test.
+		block.drain().commit(number, hash, ancient).expect("State DB commit failed.");
+
+		// And update the chain after commit to prevent race conditions
+		// (when something is in chain but you are not able to fetch details)
+		let route = self.chain.insert_block(block_data, receipts);
+		self.tracedb.import(TraceImportRequest {
+			traces: traces,
+			block_hash: hash.clone(),
+			block_number: number,
+			enacted: route.enacted.clone(),
+			retracted: route.retracted.len()
+		});
+		route
+	}
+
 	/// Import transactions from the IO queue
 	pub fn import_queued_transactions(&self, transactions: &[Bytes]) -> usize {
 		let _timer = PerfTimer::new("import_queued_transactions");
@@ -473,7 +481,7 @@ impl<V> Client<V> where V: Verifier {
 	}
 }
 
-impl<V> BlockChainClient for Client<V> where V: Verifier {
+impl BlockChainClient for Client {
 	fn call(&self, t: &SignedTransaction, analytics: CallAnalytics) -> Result<Executed, ExecutionError> {
 		let header = self.block_header(BlockID::Latest).unwrap();
 		let view = HeaderView::new(&header);
@@ -512,9 +520,6 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 		ret
 	}
 
-	fn vm_factory(&self) -> &EvmFactory {
-		&self.vm_factory
-	}
 
 	fn block_header(&self, id: BlockID) -> Option<Bytes> {
 		Self::block_hash(&self.chain, id).and_then(|hash| self.chain.block(&hash).map(|bytes| BlockView::new(&bytes).rlp().at(0).as_raw().to_vec()))
@@ -791,12 +796,12 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 		}
 	}
 
-	fn all_transactions(&self) -> Vec<SignedTransaction> {
+	fn pending_transactions(&self) -> Vec<SignedTransaction> {
-		self.miner.all_transactions()
+		self.miner.pending_transactions()
 	}
 }
 
-impl<V> MiningBlockChainClient for Client<V> where V: Verifier {
+impl MiningBlockChainClient for Client {
 	fn prepare_open_block(&self, author: Address, gas_range_target: (U256, U256), extra_data: Bytes) -> OpenBlock {
 		let engine = self.engine.deref().deref();
 		let h = self.chain.best_block_hash();
@@ -826,6 +831,43 @@ impl<V> MiningBlockChainClient for Client<V> where V: Verifier {
 
 		open_block
 	}
+
+	fn vm_factory(&self) -> &EvmFactory {
+		&self.vm_factory
+	}
+
+	fn import_sealed_block(&self, block: SealedBlock) -> ImportResult {
+		let _import_lock = self.import_lock.lock();
+		let _timer = PerfTimer::new("import_sealed_block");
+
+		let original_best = self.chain_info().best_block_hash;
+
+		let h = block.header().hash();
+		let number = block.header().number();
+
+		let block_data = block.rlp_bytes();
+		let route = self.commit_block(block, &h, &block_data);
+		trace!(target: "client", "Imported sealed block #{} ({})", number, h);
+
+		{
+			let (enacted, retracted) = self.calculate_enacted_retracted(&[route]);
+			self.miner.chain_new_blocks(self, &[h.clone()], &[], &enacted, &retracted);
+
+			self.io_channel.send(NetworkIoMessage::User(SyncMessage::NewChainBlocks {
+				imported: vec![h.clone()],
+				invalid: vec![],
+				enacted: enacted,
+				retracted: retracted,
+				sealed: vec![h.clone()],
+			})).unwrap_or_else(|e| warn!("Error sending IO notification: {:?}", e));
+		}
+
+		if self.chain_info().best_block_hash != original_best {
+			self.miner.update_sealing(self);
+		}
+
+		Ok(h)
+	}
 }
 
 impl MayPanic for Client {

ethcore/src/client/config.rs

@@ -18,8 +18,22 @@ pub use block_queue::BlockQueueConfig;
 pub use blockchain::Config as BlockChainConfig;
 pub use trace::{Config as TraceConfig, Switch};
 pub use evm::VMType;
+pub use verification::VerifierType;
 use util::journaldb;
 
+/// Client state db compaction profile
+#[derive(Debug, PartialEq)]
+pub enum DatabaseCompactionProfile {
+	/// Default compaction profile
+	Default,
+	/// HDD or other slow storage io compaction profile
+	HDD,
+}
+
+impl Default for DatabaseCompactionProfile {
+	fn default() -> Self { DatabaseCompactionProfile::Default }
+}
+
 /// Client configuration. Includes configs for all sub-systems.
 #[derive(Debug, Default)]
 pub struct ClientConfig {
@@ -37,4 +51,8 @@ pub struct ClientConfig {
 	pub name: String,
 	/// State db cache-size if not default
 	pub db_cache_size: Option<usize>,
+	/// State db compaction profile
+	pub db_compaction: DatabaseCompactionProfile,
+	/// Type of block verifier used by client.
+	pub verifier_type: VerifierType,
 }

ethcore/src/client/mod.rs

@@ -23,7 +23,7 @@ mod test_client;
 mod trace;
 
 pub use self::client::*;
-pub use self::config::{ClientConfig, BlockQueueConfig, BlockChainConfig, Switch, VMType};
+pub use self::config::{ClientConfig, DatabaseCompactionProfile, BlockQueueConfig, BlockChainConfig, Switch, VMType};
 pub use self::error::Error;
 pub use types::ids::*;
 pub use self::test_client::{TestBlockChainClient, EachBlockWith};
@@ -37,7 +37,7 @@ use util::numbers::U256;
 use util::Itertools;
 use blockchain::TreeRoute;
 use block_queue::BlockQueueInfo;
-use block::OpenBlock;
+use block::{OpenBlock, SealedBlock};
 use header::{BlockNumber, Header};
 use transaction::{LocalizedTransaction, SignedTransaction};
 use log_entry::LocalizedLogEntry;
@@ -172,9 +172,6 @@ pub trait BlockChainClient : Sync + Send {
 	// TODO: should be able to accept blockchain location for call.
 	fn call(&self, t: &SignedTransaction, analytics: CallAnalytics) -> Result<Executed, ExecutionError>;
 
-	/// Returns EvmFactory.
-	fn vm_factory(&self) -> &EvmFactory;
-
 	/// Returns traces matching given filter.
 	fn filter_traces(&self, filter: TraceFilter) -> Option<Vec<LocalizedTrace>>;
 
@@ -197,7 +194,7 @@ pub trait BlockChainClient : Sync + Send {
 	fn queue_transactions(&self, transactions: Vec<Bytes>);
 
 	/// list all transactions
-	fn all_transactions(&self) -> Vec<SignedTransaction>;
+	fn pending_transactions(&self) -> Vec<SignedTransaction>;
 
 	/// Get the gas price distribution.
 	fn gas_price_statistics(&self, sample_size: usize, distribution_size: usize) -> Result<Vec<U256>, ()> {
@@ -253,4 +250,10 @@ pub trait MiningBlockChainClient : BlockChainClient {
 	/// Returns OpenBlock prepared for closing.
 	fn prepare_open_block(&self, author: Address, gas_range_target: (U256, U256), extra_data: Bytes)
 		-> OpenBlock;
+
+	/// Returns EvmFactory.
+	fn vm_factory(&self) -> &EvmFactory;
+
+	/// Import sealed block. Skips all verifications.
+	fn import_sealed_block(&self, block: SealedBlock) -> ImportResult;
 }

ethcore/src/client/test_client.rs

@@ -29,9 +29,10 @@ use blockchain::extras::BlockReceipts;
 use error::{ImportResult};
 use evm::Factory as EvmFactory;
 use miner::{Miner, MinerService};
+use spec::Spec;
 
 use block_queue::BlockQueueInfo;
-use block::OpenBlock;
+use block::{OpenBlock, SealedBlock};
 use executive::Executed;
 use error::{ExecutionError};
 use trace::LocalizedTrace;
@@ -105,7 +106,7 @@ impl TestBlockChainClient {
 			execution_result: RwLock::new(None),
 			receipts: RwLock::new(HashMap::new()),
 			queue_size: AtomicUsize::new(0),
-			miner: Arc::new(Miner::default()),
+			miner: Arc::new(Miner::with_spec(Spec::new_test())),
 		};
 		client.add_blocks(1, EachBlockWith::Nothing); // add genesis block
 		client.genesis_hash = client.last_hash.read().unwrap().clone();
@@ -243,6 +244,14 @@ impl MiningBlockChainClient for TestBlockChainClient {
 	fn prepare_open_block(&self, _author: Address, _gas_range_target: (U256, U256), _extra_data: Bytes) -> OpenBlock {
 		unimplemented!();
 	}
+	
+	fn vm_factory(&self) -> &EvmFactory {
+		unimplemented!();
+	}
+
+	fn import_sealed_block(&self, _block: SealedBlock) -> ImportResult {
+		unimplemented!();
+	}
 }
 
 impl BlockChainClient for TestBlockChainClient {
@@ -462,10 +471,6 @@ impl BlockChainClient for TestBlockChainClient {
 		}
 	}
 
-	fn vm_factory(&self) -> &EvmFactory {
-		unimplemented!();
-	}
-
 	fn filter_traces(&self, _filter: TraceFilter) -> Option<Vec<LocalizedTrace>> {
 		unimplemented!();
 	}
@@ -499,7 +504,7 @@ impl BlockChainClient for TestBlockChainClient {
 		self.import_transactions(tx);
 	}
 
-	fn all_transactions(&self) -> Vec<SignedTransaction> {
+	fn pending_transactions(&self) -> Vec<SignedTransaction> {
-		self.miner.all_transactions()
+		self.miner.pending_transactions()
 	}
 }

ethcore/src/ethereum/ethash.rs

@@ -14,9 +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/>.
 
-extern crate ethash;
+use ethash::{quick_get_difficulty, EthashManager, H256 as EH256};
-
-use self::ethash::{quick_get_difficulty, EthashManager, H256 as EH256};
 use common::*;
 use block::*;
 use spec::CommonParams;

ethcore/src/json_tests/chain.rs

@@ -22,6 +22,7 @@ use tests::helpers::*;
 use devtools::*;
 use spec::Genesis;
 use ethjson;
+use ethjson::blockchain::BlockChain;
 use miner::Miner;
 
 pub fn json_chain_test(json_data: &[u8], era: ChainEra) -> Vec<String> {
@@ -41,20 +42,28 @@ pub fn json_chain_test(json_data: &[u8], era: ChainEra) -> Vec<String> {
 
 			flush!("   - {}...", name);
 
+			let spec = |blockchain: &BlockChain| {
+				let genesis = Genesis::from(blockchain.genesis());
+				let state = From::from(blockchain.pre_state.clone());
 				let mut spec = match era {
 					ChainEra::Frontier => ethereum::new_frontier_test(),
 					ChainEra::Homestead => ethereum::new_homestead_test(),
 				};
-
-			let genesis = Genesis::from(blockchain.genesis());
-			let state = From::from(blockchain.pre_state.clone());
 				spec.set_genesis_state(state);
 				spec.overwrite_genesis_params(genesis);
 				assert!(spec.is_state_root_valid());
+				spec
+			};
 
 			let temp = RandomTempPath::new();
 			{
-				let client = Client::new(ClientConfig::default(), spec, temp.as_path(), Arc::new(Miner::default()), IoChannel::disconnected()).unwrap();
+				let client = Client::new(
+					ClientConfig::default(),
+					spec(&blockchain),
+					temp.as_path(),
+					Arc::new(Miner::with_spec(spec(&blockchain))),
+					IoChannel::disconnected()
+				).unwrap();
 				for b in &blockchain.blocks_rlp() {
 					if Block::is_good(&b) {
 						let _ = client.import_block(b.clone());

ethcore/src/lib.rs

@@ -91,6 +91,8 @@ extern crate ethjson;
 extern crate bloomchain;
 #[macro_use] extern crate ethcore_ipc as ipc;
 extern crate rayon;
+extern crate hyper;
+extern crate ethash;
 pub extern crate ethstore;
 
 #[cfg(test)] extern crate ethcore_devtools as devtools;

ethcore/src/miner/miner.rs

@@ -16,8 +16,10 @@
 
 use rayon::prelude::*;
 use std::sync::atomic::AtomicBool;
+use std::time::{Instant, Duration};
 
 use util::*;
+use util::Colour::White;
 use account_provider::AccountProvider;
 use views::{BlockView, HeaderView};
 use client::{MiningBlockChainClient, Executive, Executed, EnvInfo, TransactOptions, BlockID, CallAnalytics};
@@ -28,6 +30,61 @@ use receipt::{Receipt};
 use spec::Spec;
 use engine::Engine;
 use miner::{MinerService, MinerStatus, TransactionQueue, AccountDetails, TransactionImportResult, TransactionOrigin};
+use miner::work_notify::WorkPoster;
+
+/// Different possible definitions for pending transaction set.
+#[derive(Debug)]
+pub enum PendingSet {
+	/// Always just the transactions in the queue. These have had only cheap checks.
+	AlwaysQueue,
+	/// Always just the transactions in the sealing block. These have had full checks but
+	/// may be empty if the node is not actively mining or has force_sealing enabled.
+	AlwaysSealing,
+	/// Try the sealing block, but if it is not currently sealing, fallback to the queue.
+	SealingOrElseQueue,
+}
+
+/// Configures the behaviour of the miner.
+#[derive(Debug)]
+pub struct MinerOptions {
+	/// URLs to notify when there is new work.
+	pub new_work_notify: Vec<String>,
+	/// Force the miner to reseal, even when nobody has asked for work.
+	pub force_sealing: bool,
+	/// Reseal on receipt of new external transactions.
+	pub reseal_on_external_tx: bool,
+	/// Reseal on receipt of new local transactions.
+	pub reseal_on_own_tx: bool,
+	/// Minimum period between transaction-inspired reseals.
+	pub reseal_min_period: Duration,
+	/// Maximum amount of gas to bother considering for block insertion.
+	pub tx_gas_limit: U256,
+	/// Maximum size of the transaction queue.
+	pub tx_queue_size: usize,
+	/// Whether we should fallback to providing all the queue's transactions or just pending.
+	pub pending_set: PendingSet,
+	/// How many historical work packages can we store before running out?
+	pub work_queue_size: usize,
+	/// Can we submit two different solutions for the same block and expect both to result in an import?
+	pub enable_resubmission: bool,
+}
+
+impl Default for MinerOptions {
+	fn default() -> Self {
+		MinerOptions {
+			new_work_notify: vec![],
+			force_sealing: false,
+			reseal_on_external_tx: true,
+			reseal_on_own_tx: true,
+			tx_gas_limit: !U256::zero(),
+			tx_queue_size: 1024,
+			pending_set: PendingSet::AlwaysQueue,
+			reseal_min_period: Duration::from_secs(0),
+			work_queue_size: 20,
+			enable_resubmission: true,
+		}
+	}
+}
 
 /// Keeps track of transactions using priority queue and holds currently mined block.
 pub struct Miner {
@@ -36,8 +93,9 @@ pub struct Miner {
 	sealing_work: Mutex<UsingQueue<ClosedBlock>>,
 
 	// for sealing...
-	force_sealing: bool,
+	options: MinerOptions,
 	sealing_enabled: AtomicBool,
+	next_allowed_reseal: Mutex<Instant>,
 	sealing_block_last_request: Mutex<u64>,
 	gas_range_target: RwLock<(U256, U256)>,
 	author: RwLock<Address>,
@@ -45,55 +103,44 @@ pub struct Miner {
 	spec: Spec,
 
 	accounts: Option<Arc<AccountProvider>>,
-}
+	work_poster: Option<WorkPoster>,
-
-impl Default for Miner {
-	fn default() -> Miner {
-		Miner {
-			transaction_queue: Mutex::new(TransactionQueue::new()),
-			force_sealing: false,
-			sealing_enabled: AtomicBool::new(false),
-			sealing_block_last_request: Mutex::new(0),
-			sealing_work: Mutex::new(UsingQueue::new(5)),
-			gas_range_target: RwLock::new((U256::zero(), U256::zero())),
-			author: RwLock::new(Address::default()),
-			extra_data: RwLock::new(Vec::new()),
-			accounts: None,
-			spec: Spec::new_test(),
-		}
-	}
 }
 
 impl Miner {
-	/// Creates new instance of miner
+	/// Creates new instance of miner without accounts, but with given spec.
-	pub fn new(force_sealing: bool, spec: Spec) -> Arc<Miner> {
+	pub fn with_spec(spec: Spec) -> Miner {
-		Arc::new(Miner {
+		Miner {
 			transaction_queue: Mutex::new(TransactionQueue::new()),
-			force_sealing: force_sealing,
+			options: Default::default(),
-			sealing_enabled: AtomicBool::new(force_sealing),
+			sealing_enabled: AtomicBool::new(false),
+			next_allowed_reseal: Mutex::new(Instant::now()),
 			sealing_block_last_request: Mutex::new(0),
-			sealing_work: Mutex::new(UsingQueue::new(5)),
+			sealing_work: Mutex::new(UsingQueue::new(20)),
 			gas_range_target: RwLock::new((U256::zero(), U256::zero())),
 			author: RwLock::new(Address::default()),
 			extra_data: RwLock::new(Vec::new()),
 			accounts: None,
 			spec: spec,
-		})
+			work_poster: None,
+		}
 	}
 
 	/// Creates new instance of miner
-	pub fn with_accounts(force_sealing: bool, spec: Spec, accounts: Arc<AccountProvider>) -> Arc<Miner> {
+	pub fn new(options: MinerOptions, spec: Spec, accounts: Option<Arc<AccountProvider>>) -> Arc<Miner> {
+		let work_poster = if !options.new_work_notify.is_empty() { Some(WorkPoster::new(&options.new_work_notify)) } else { None };
 		Arc::new(Miner {
-			transaction_queue: Mutex::new(TransactionQueue::new()),
+			transaction_queue: Mutex::new(TransactionQueue::with_limits(options.tx_queue_size, options.tx_gas_limit)),
-			force_sealing: force_sealing,
+			sealing_enabled: AtomicBool::new(options.force_sealing || !options.new_work_notify.is_empty()),
-			sealing_enabled: AtomicBool::new(force_sealing),
+			next_allowed_reseal: Mutex::new(Instant::now()),
 			sealing_block_last_request: Mutex::new(0),
-			sealing_work: Mutex::new(UsingQueue::new(5)),
+			sealing_work: Mutex::new(UsingQueue::new(options.work_queue_size)),
 			gas_range_target: RwLock::new((U256::zero(), U256::zero())),
 			author: RwLock::new(Address::default()),
 			extra_data: RwLock::new(Vec::new()),
-			accounts: Some(accounts),
+			options: options,
+			accounts: accounts,
 			spec: spec,
+			work_poster: work_poster,
 		})
 	}
 
@@ -101,15 +148,20 @@ impl Miner {
 		self.spec.engine.deref()
 	}
 
+	fn forced_sealing(&self) -> bool {
+		self.options.force_sealing || !self.options.new_work_notify.is_empty()
+	}
+
 	/// Prepares new block for sealing including top transactions from queue.
 	#[cfg_attr(feature="dev", allow(match_same_arms))]
 	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
 	fn prepare_sealing(&self, chain: &MiningBlockChainClient) {
 		trace!(target: "miner", "prepare_sealing: entering");
 
-		let (transactions, mut open_block) = {
+		let (transactions, mut open_block, original_work_hash) = {
 			let transactions = {self.transaction_queue.lock().unwrap().top_transactions()};
 			let mut sealing_work = self.sealing_work.lock().unwrap();
+			let last_work_hash = sealing_work.peek_last_ref().map(|pb| pb.block().fields().header.hash());
 			let best_hash = chain.best_block_header().sha3();
 /*
 			// check to see if last ClosedBlock in would_seals is actually same parent block.
@@ -136,7 +188,7 @@ impl Miner {
 					)
 				}
 			};
-			(transactions, open_block)
+			(transactions, open_block, last_work_hash)
 		};
 
 		let mut invalid_transactions = HashSet::new();
@@ -202,13 +254,27 @@ impl Miner {
 			}
 		}
 
+		let (work, is_new) = {
 			let mut sealing_work = self.sealing_work.lock().unwrap();
-		if sealing_work.peek_last_ref().map_or(true, |pb| pb.block().fields().header.hash() != block.block().fields().header.hash()) {
+			let last_work_hash = sealing_work.peek_last_ref().map(|pb| pb.block().fields().header.hash());
+			trace!(target: "miner", "Checking whether we need to reseal: orig={:?} last={:?}, this={:?}", original_work_hash, last_work_hash, block.block().fields().header.hash());
+			let (work, is_new) = if last_work_hash.map_or(true, |h| h != block.block().fields().header.hash()) {
 				trace!(target: "miner", "Pushing a new, refreshed or borrowed pending {}...", block.block().fields().header.hash());
+				let pow_hash = block.block().fields().header.hash();
+				let number = block.block().fields().header.number();
+				let difficulty = *block.block().fields().header.difficulty();
+				let is_new = original_work_hash.map_or(true, |h| block.block().fields().header.hash() != h);
 				sealing_work.push(block);
-		}
+				(Some((pow_hash, difficulty, number)), is_new)
-
+			} else {
+				(None, false)
+			};
 			trace!(target: "miner", "prepare_sealing: leaving (last={:?})", sealing_work.peek_last_ref().map(|b| b.block().fields().header.hash()));
+			(work, is_new)
+		};
+		if is_new {
+			work.map(|(pow_hash, difficulty, number)| self.work_poster.as_ref().map(|ref p| p.notify(pow_hash, difficulty, number)));
+		}
 	}
 
 	fn update_gas_limit(&self, chain: &MiningBlockChainClient) {
@@ -236,6 +302,9 @@ impl Miner {
 		// Return if
 		!have_work
 	}
+
+	/// Are we allowed to do a non-mandatory reseal?
+	fn tx_reseal_allowed(&self) -> bool { Instant::now() > *self.next_allowed_reseal.lock().unwrap() }
 }
 
 const SEALING_TIMEOUT_IN_BLOCKS : u64 = 5;
@@ -373,6 +442,10 @@ impl MinerService for Miner {
 		self.transaction_queue.lock().unwrap().set_limit(limit)
 	}
 
+	fn set_tx_gas_limit(&self, limit: U256) {
+		self.transaction_queue.lock().unwrap().set_tx_gas_limit(limit)
+	}
+
 	/// Get the author that we will seal blocks as.
 	fn author(&self) -> Address {
 		*self.author.read().unwrap()
@@ -402,7 +475,7 @@ impl MinerService for Miner {
 				.map(|tx| transaction_queue.add(tx, &fetch_account, TransactionOrigin::External))
 				.collect()
 		};
-		if !results.is_empty() {
+		if !results.is_empty() && self.options.reseal_on_external_tx && 	self.tx_reseal_allowed() {
 			self.update_sealing(chain);
 		}
 		results
@@ -437,7 +510,7 @@ impl MinerService for Miner {
 			import
 		};
 
-		if imported.is_ok() {
+		if imported.is_ok() && self.options.reseal_on_own_tx && self.tx_reseal_allowed() {
 			// Make sure to do it after transaction is imported and lock is droped.
 			// We need to create pending block and enable sealing
 			let prepared = self.enable_and_prepare_sealing(chain);
@@ -451,26 +524,6 @@ impl MinerService for Miner {
 		imported
 	}
 
-	fn pending_transactions_hashes(&self) -> Vec<H256> {
-		let queue = self.transaction_queue.lock().unwrap();
-		match (self.sealing_enabled.load(atomic::Ordering::Relaxed), self.sealing_work.lock().unwrap().peek_last_ref()) {
-			(true, Some(pending)) => pending.transactions().iter().map(|t| t.hash()).collect(),
-			_ => {
-				queue.pending_hashes()
-			}
-		}
-	}
-
-	fn transaction(&self, hash: &H256) -> Option<SignedTransaction> {
-		let queue = self.transaction_queue.lock().unwrap();
-		match (self.sealing_enabled.load(atomic::Ordering::Relaxed), self.sealing_work.lock().unwrap().peek_last_ref()) {
-			(true, Some(pending)) => pending.transactions().iter().find(|t| &t.hash() == hash).cloned(),
-			_ => {
-				queue.find(hash)
-			}
-		}
-	}
-
 	fn all_transactions(&self) -> Vec<SignedTransaction> {
 		let queue = self.transaction_queue.lock().unwrap();
 		queue.top_transactions()
@@ -478,13 +531,42 @@ impl MinerService for Miner {
 
 	fn pending_transactions(&self) -> Vec<SignedTransaction> {
 		let queue = self.transaction_queue.lock().unwrap();
+		let sw = self.sealing_work.lock().unwrap();
 		// TODO: should only use the sealing_work when it's current (it could be an old block)
-		match (self.sealing_enabled.load(atomic::Ordering::Relaxed), self.sealing_work.lock().unwrap().peek_last_ref()) {
+		let sealing_set = match self.sealing_enabled.load(atomic::Ordering::Relaxed) {
-			(true, Some(pending)) => pending.transactions().clone(),
+			true => sw.peek_last_ref(),
-			_ => {
+			false => None,
-				queue.top_transactions()
+		};
+		match (&self.options.pending_set, sealing_set) {
+			(&PendingSet::AlwaysQueue, _) | (&PendingSet::SealingOrElseQueue, None) => queue.top_transactions(),
+			(_, sealing) => sealing.map_or_else(Vec::new, |s| s.transactions().clone()),
 		}
 	}
+
+	fn pending_transactions_hashes(&self) -> Vec<H256> {
+		let queue = self.transaction_queue.lock().unwrap();
+		let sw = self.sealing_work.lock().unwrap();
+		let sealing_set = match self.sealing_enabled.load(atomic::Ordering::Relaxed) {
+			true => sw.peek_last_ref(),
+			false => None,
+		};
+		match (&self.options.pending_set, sealing_set) {
+			(&PendingSet::AlwaysQueue, _) | (&PendingSet::SealingOrElseQueue, None) => queue.pending_hashes(),
+			(_, sealing) => sealing.map_or_else(Vec::new, |s| s.transactions().iter().map(|t| t.hash()).collect()),
+		}
+	}
+
+	fn transaction(&self, hash: &H256) -> Option<SignedTransaction> {
+		let queue = self.transaction_queue.lock().unwrap();
+		let sw = self.sealing_work.lock().unwrap();
+		let sealing_set = match self.sealing_enabled.load(atomic::Ordering::Relaxed) {
+			true => sw.peek_last_ref(),
+			false => None,
+		};
+		match (&self.options.pending_set, sealing_set) {
+			(&PendingSet::AlwaysQueue, _) | (&PendingSet::SealingOrElseQueue, None) => queue.find(hash),
+			(_, sealing) => sealing.and_then(|s| s.transactions().iter().find(|t| &t.hash() == hash).cloned()),
+		}
 	}
 
 	fn pending_receipts(&self) -> BTreeMap<H256, Receipt> {
@@ -511,7 +593,7 @@ impl MinerService for Miner {
 			let current_no = chain.chain_info().best_block_number;
 			let has_local_transactions = self.transaction_queue.lock().unwrap().has_local_pending_transactions();
 			let last_request = *self.sealing_block_last_request.lock().unwrap();
-			let should_disable_sealing = !self.force_sealing
+			let should_disable_sealing = !self.forced_sealing()
 				&& !has_local_transactions
 				&& current_no > last_request
 				&& current_no - last_request > SEALING_TIMEOUT_IN_BLOCKS;
@@ -521,6 +603,7 @@ impl MinerService for Miner {
 				self.sealing_enabled.store(false, atomic::Ordering::Relaxed);
 				self.sealing_work.lock().unwrap().reset();
 			} else {
+				*self.next_allowed_reseal.lock().unwrap() = Instant::now() + self.options.reseal_min_period;
 				self.prepare_sealing(chain);
 			}
 		}
@@ -537,26 +620,22 @@ impl MinerService for Miner {
 	}
 
 	fn submit_seal(&self, chain: &MiningBlockChainClient, pow_hash: H256, seal: Vec<Bytes>) -> Result<(), Error> {
-		if let Some(b) = self.sealing_work.lock().unwrap().take_used_if(|b| &b.hash() == &pow_hash) {
+		let result = if let Some(b) = self.sealing_work.lock().unwrap().get_used_if(if self.options.enable_resubmission { GetAction::Clone } else { GetAction::Take }, |b| &b.hash() == &pow_hash) {
-			match b.lock().try_seal(self.engine(), seal) {
+			b.lock().try_seal(self.engine(), seal).or_else(|_| {
-				Err(_) => {
+				warn!(target: "miner", "Mined solution rejected: Invalid.");
-					info!(target: "miner", "Mined block rejected, PoW was invalid.");
 				Err(Error::PowInvalid)
-				}
+			})
-				Ok(sealed) => {
-					info!(target: "miner", "New block mined, hash: {}", sealed.header().hash());
-					// TODO: commit DB from `sealed.drain` and make a VerifiedBlock to skip running the transactions twice.
-					let b = sealed.rlp_bytes();
-					let h = b.sha3();
-					try!(chain.import_block(b));
-					info!("Block {} submitted and imported.", h);
-					Ok(())
-				}
-			}
 		} else {
-			info!(target: "miner", "Mined block rejected, PoW hash invalid or out of date.");
+			warn!(target: "miner", "Mined solution rejected: Block unknown or out of date.");
 			Err(Error::PowHashInvalid)
-		}
+		};
+		result.and_then(|sealed| {
+			let n = sealed.header().number();
+			let h = sealed.header().hash();
+			try!(chain.import_sealed_block(sealed));
+			info!(target: "miner", "Mined block imported OK. #{}: {}", paint(White.bold(), format!("{}", n)), paint(White.bold(), h.hex()));
+			Ok(())
+		})
 	}
 
 	fn chain_new_blocks(&self, chain: &MiningBlockChainClient, _imported: &[H256], _invalid: &[H256], enacted: &[H256], retracted: &[H256]) {
@@ -626,6 +705,7 @@ mod tests {
 	use util::*;
 	use client::{TestBlockChainClient, EachBlockWith};
 	use block::*;
+	use spec::Spec;
 
 	// TODO [ToDr] To uncomment` when TestBlockChainClient can actually return a ClosedBlock.
 	#[ignore]
@@ -633,7 +713,7 @@ mod tests {
 	fn should_prepare_block_to_seal() {
 		// given
 		let client = TestBlockChainClient::default();
-		let miner = Miner::default();
+		let miner = Miner::with_spec(Spec::new_test());
 
 		// when
 		let sealing_work = miner.map_sealing_work(&client, |_| ());
@@ -645,7 +725,7 @@ mod tests {
 	fn should_still_work_after_a_couple_of_blocks() {
 		// given
 		let client = TestBlockChainClient::default();
-		let miner = Miner::default();
+		let miner = Miner::with_spec(Spec::new_test());
 
 		let res = miner.map_sealing_work(&client, |b| b.block().fields().header.hash());
 		assert!(res.is_some());

ethcore/src/miner/mod.rs

@@ -28,11 +28,12 @@
 //! extern crate ethcore;
 //! use std::env;
 //! use util::network::{NetworkService, NetworkConfiguration};
+//! use ethcore::ethereum;
 //! use ethcore::client::{Client, ClientConfig};
 //! use ethcore::miner::{Miner, MinerService};
 //!
 //! fn main() {
-//!		let miner: Miner = Miner::default();
+//!		let miner: Miner = Miner::with_spec(ethereum::new_frontier(true));
 //!		// get status
 //!		assert_eq!(miner.status().transactions_in_pending_queue, 0);
 //!
@@ -44,9 +45,10 @@
 mod miner;
 mod external;
 mod transaction_queue;
+mod work_notify;
 
 pub use self::transaction_queue::{TransactionQueue, AccountDetails, TransactionImportResult, TransactionOrigin};
-pub use self::miner::{Miner};
+pub use self::miner::{Miner, MinerOptions, PendingSet};
 pub use self::external::{ExternalMiner, ExternalMinerService};
 
 use std::collections::BTreeMap;
@@ -100,6 +102,9 @@ pub trait MinerService : Send + Sync {
 	/// Set maximal number of transactions kept in the queue (both current and future).
 	fn set_transactions_limit(&self, limit: usize);
 
+	/// Set maximum amount of gas allowed for any single transaction to mine.
+	fn set_tx_gas_limit(&self, limit: U256);
+
 	/// Imports transactions to transaction queue.
 	fn import_transactions<T>(&self, chain: &MiningBlockChainClient, transactions: Vec<SignedTransaction>, fetch_account: T) ->
 		Vec<Result<TransactionImportResult, Error>>

ethcore/src/miner/transaction_queue.rs

@@ -334,6 +334,8 @@ const GAS_LIMIT_HYSTERESIS: usize = 10; // %
 pub struct TransactionQueue {
 	/// Gas Price threshold for transactions that can be imported to this queue (defaults to 0)
 	minimal_gas_price: U256,
+	/// The maximum amount of gas any individual transaction may use.
+	tx_gas_limit: U256,
 	/// Current gas limit (block gas limit * factor). Transactions above the limit will not be accepted (default to !0)
 	gas_limit: U256,
 	/// Priority queue for transactions that can go to block
@@ -355,11 +357,11 @@ impl Default for TransactionQueue {
 impl TransactionQueue {
 	/// Creates new instance of this Queue
 	pub fn new() -> Self {
-		Self::with_limit(1024)
+		Self::with_limits(1024, !U256::zero())
 	}
 
 	/// Create new instance of this Queue with specified limits
-	pub fn with_limit(limit: usize) -> Self {
+	pub fn with_limits(limit: usize, tx_gas_limit: U256) -> Self {
 		let current = TransactionSet {
 			by_priority: BTreeSet::new(),
 			by_address: Table::new(),
@@ -374,6 +376,7 @@ impl TransactionQueue {
 
 		TransactionQueue {
 			minimal_gas_price: U256::zero(),
+			tx_gas_limit: tx_gas_limit,
 			gas_limit: !U256::zero(),
 			current: current,
 			future: future,
@@ -418,6 +421,12 @@ impl TransactionQueue {
 		};
 	}
 
+	/// Set the new limit for the amount of gas any individual transaction may have.
+	/// Any transaction already imported to the queue is not affected.
+	pub fn set_tx_gas_limit(&mut self, limit: U256) {
+		self.tx_gas_limit = limit;
+	}
+
 	/// Returns current status for this queue
 	pub fn status(&self) -> TransactionQueueStatus {
 		TransactionQueueStatus {
@@ -432,10 +441,12 @@ impl TransactionQueue {
 
 		trace!(target: "miner", "Importing: {:?}", tx.hash());
 
-		if tx.gas_price < self.minimal_gas_price {
+		if tx.gas_price < self.minimal_gas_price && origin != TransactionOrigin::Local {
 			trace!(target: "miner",
 				"Dropping transaction below minimal gas price threshold: {:?} (gp: {} < {})",
-				tx.hash(), tx.gas_price, self.minimal_gas_price
+				tx.hash(),
+				tx.gas_price,
+				self.minimal_gas_price
 			);
 
 			return Err(Error::Transaction(TransactionError::InsufficientGasPrice {
@@ -446,10 +457,13 @@ impl TransactionQueue {
 
 		try!(tx.check_low_s());
 
-		if tx.gas > self.gas_limit {
+		if tx.gas > self.gas_limit || tx.gas > self.tx_gas_limit {
 			trace!(target: "miner",
-				"Dropping transaction above gas limit: {:?} ({} > {})",
+				"Dropping transaction above gas limit: {:?} ({} > min({}, {}))",
-				tx.hash(), tx.gas, self.gas_limit
+				tx.hash(),
+				tx.gas,
+				self.gas_limit,
+				self.tx_gas_limit
 			);
 
 			return Err(Error::Transaction(TransactionError::GasLimitExceeded {
@@ -463,8 +477,13 @@ impl TransactionQueue {
 
 		let cost = vtx.transaction.value + vtx.transaction.gas_price * vtx.transaction.gas;
 		if client_account.balance < cost {
-			trace!(target: "miner", "Dropping transaction without sufficient balance: {:?} ({} < {})",
+			trace!(target: "miner",
-				vtx.hash(), client_account.balance, cost);
+				"Dropping transaction without sufficient balance: {:?} ({} < {})",
+				vtx.hash(),
+				client_account.balance,
+				cost
+			);
+
 			return Err(Error::Transaction(TransactionError::InsufficientBalance {
 				cost: cost,
 				balance: client_account.balance
@@ -1036,7 +1055,7 @@ mod test {
 	}
 
 	#[test]
-	fn should_not_import_transaction_below_min_gas_price_threshold() {
+	fn should_not_import_transaction_below_min_gas_price_threshold_if_external() {
 		// given
 		let mut txq = TransactionQueue::new();
 		let tx = new_tx();
@@ -1055,6 +1074,23 @@ mod test {
 		assert_eq!(stats.future, 0);
 	}
 
+	#[test]
+	fn should_import_transaction_below_min_gas_price_threshold_if_local() {
+		// given
+		let mut txq = TransactionQueue::new();
+		let tx = new_tx();
+		txq.set_minimal_gas_price(tx.gas_price + U256::one());
+
+		// when
+		let res = txq.add(tx, &default_nonce, TransactionOrigin::Local);
+
+		// then
+		assert_eq!(res.unwrap(), TransactionImportResult::Current);
+		let stats = txq.status();
+		assert_eq!(stats.pending, 1);
+		assert_eq!(stats.future, 0);
+	}
+
 	#[test]
 	fn should_reject_incorectly_signed_transaction() {
 		// given
@@ -1288,7 +1324,7 @@ mod test {
 	#[test]
 	fn should_drop_old_transactions_when_hitting_the_limit() {
 		// given
-		let mut txq = TransactionQueue::with_limit(1);
+		let mut txq = TransactionQueue::with_limits(1, !U256::zero());
 		let (tx, tx2) = new_txs(U256::one());
 		let sender = tx.sender().unwrap();
 		let nonce = tx.nonce;
@@ -1310,7 +1346,7 @@ mod test {
 	#[test]
 	fn should_return_correct_nonces_when_dropped_because_of_limit() {
 		// given
-		let mut txq = TransactionQueue::with_limit(2);
+		let mut txq = TransactionQueue::with_limits(2, !U256::zero());
 		let tx = new_tx();
 		let (tx1, tx2) = new_txs(U256::one());
 		let sender = tx1.sender().unwrap();
@@ -1331,7 +1367,7 @@ mod test {
 
 	#[test]
 	fn should_limit_future_transactions() {
-		let mut txq = TransactionQueue::with_limit(1);
+		let mut txq = TransactionQueue::with_limits(1, !U256::zero());
 		txq.current.set_limit(10);
 		let (tx1, tx2) = new_txs_with_gas_price_diff(U256::from(4), U256::from(1));
 		let (tx3, tx4) = new_txs_with_gas_price_diff(U256::from(4), U256::from(2));
@@ -1591,7 +1627,7 @@ mod test {
 	#[test]
 	fn should_keep_right_order_in_future() {
 		// given
-		let mut txq = TransactionQueue::with_limit(1);
+		let mut txq = TransactionQueue::with_limits(1, !U256::zero());
 		let (tx1, tx2) = new_txs(U256::from(1));
 		let prev_nonce = |a: &Address| AccountDetails { nonce: default_nonce(a).nonce - U256::one(), balance:
 			default_nonce(a).balance };

ethcore/src/miner/work_notify.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/>.
+
+extern crate hyper;
+
+use hyper::header::ContentType;
+use hyper::method::Method;
+use hyper::client::{Request, Response, Client};
+use hyper::{Next};
+use hyper::net::HttpStream;
+use ethash::SeedHashCompute;
+use hyper::Url;
+use util::*;
+use ethereum::ethash::Ethash;
+
+pub struct WorkPoster {
+	urls: Vec<Url>,
+	client: Mutex<Client<PostHandler>>,
+	seed_compute: Mutex<SeedHashCompute>,
+}
+
+impl WorkPoster {
+	pub fn new(urls: &[String]) -> Self {
+		let urls = urls.into_iter().filter_map(|u| {
+			match Url::parse(&u) {
+				Ok(url) => Some(url),
+				Err(e) => {
+					warn!("Error parsing URL {} : {}", u, e);
+					None
+				}
+			}
+		}).collect();
+		let client = WorkPoster::create_client();
+		WorkPoster {
+			client: Mutex::new(client),
+			urls: urls,
+			seed_compute: Mutex::new(SeedHashCompute::new()),
+		}
+	}
+
+	fn create_client() -> Client<PostHandler> {
+		let client = Client::<PostHandler>::configure()
+			.keep_alive(true)
+			.build().expect("Error creating HTTP client") as Client<PostHandler>;
+		client
+	}
+
+	pub fn notify(&self, pow_hash: H256, difficulty: U256, number: u64) {
+		// TODO: move this to engine
+		let target = Ethash::difficulty_to_boundary(&difficulty);
+		let seed_hash = &self.seed_compute.lock().unwrap().get_seedhash(number);
+		let seed_hash = H256::from_slice(&seed_hash[..]);
+		let body = format!(r#"{{ "result": ["0x{}","0x{}","0x{}","0x{:x}"] }}"#,
+			pow_hash.hex(), seed_hash.hex(), target.hex(), number);
+		let mut client = self.client.lock().unwrap();
+		for u in &self.urls {
+			if let Err(e) = client.request(u.clone(), PostHandler { body: body.clone() }) {
+				warn!("Error sending HTTP notification to {} : {}, retrying", u, e);
+				// TODO: remove this once https://github.com/hyperium/hyper/issues/848 is fixed
+				*client = WorkPoster::create_client();
+				if let Err(e) = client.request(u.clone(), PostHandler { body: body.clone() }) {
+					warn!("Error sending HTTP notification to {} : {}", u, e);
+				}
+			}
+		}
+	}
+}
+
+struct PostHandler {
+	body: String,
+}
+
+impl hyper::client::Handler<HttpStream> for PostHandler {
+	fn on_request(&mut self, request: &mut Request) -> Next {
+		request.set_method(Method::Post);
+		request.headers_mut().set(ContentType::json());
+		Next::write()
+	}
+
+	fn on_request_writable(&mut self, encoder: &mut hyper::Encoder<HttpStream>) -> Next {
+		if let Err(e) = encoder.write_all(self.body.as_bytes()) {
+			trace!("Error posting work data: {}", e);
+		}
+		encoder.close();
+		Next::read()
+
+	}
+
+	fn on_response(&mut self, _response: Response) -> Next {
+		Next::end()
+	}
+
+	fn on_response_readable(&mut self, _decoder: &mut hyper::Decoder<HttpStream>) -> Next {
+        Next::end()
+	}
+
+    fn on_error(&mut self, err: hyper::Error) -> Next {
+		trace!("Error posting work data: {}", err);
+		Next::end()
+    }
+}
+

ethcore/src/service.rs

@@ -17,6 +17,7 @@
 //! Creates and registers client and network services.
 
 use util::*;
+use util::Colour::{Yellow, White};
 use util::panics::*;
 use spec::Spec;
 use error::*;
@@ -36,6 +37,8 @@ pub enum SyncMessage {
 		retracted: Vec<H256>,
 		/// Hashes of blocks that are now included in cannonical chain
 		enacted: Vec<H256>,
+		/// Hashes of blocks that are sealed by this node
+		sealed: Vec<H256>,
 	},
 	/// Best Block Hash in chain has been changed
 	NewChainHead,
@@ -69,8 +72,7 @@ impl ClientService {
 			try!(net_service.start());
 		}
 
-		info!("Starting {}", net_service.host_info());
+		info!("Configured for {} using {} engine", paint(White.bold(), spec.name.clone()), paint(Yellow.bold(), spec.engine.name().to_owned()));
-		info!("Configured for {} using {:?} engine", spec.name, spec.engine.name());
 		let client = try!(Client::new(config, spec, db_path, miner, net_service.io().channel()));
 		panic_handler.forward_from(client.deref());
 		let client_io = Arc::new(ClientIoHandler {
@@ -159,9 +161,15 @@ mod tests {
 
 	#[test]
 	fn it_can_be_started() {
-		let spec = get_test_spec();
 		let temp_path = RandomTempPath::new();
-		let service = ClientService::start(ClientConfig::default(), spec, NetworkConfiguration::new_local(), &temp_path.as_path(), Arc::new(Miner::default()), false);
+		let service = ClientService::start(
+			ClientConfig::default(),
+			get_test_spec(),
+			NetworkConfiguration::new_local(),
+			&temp_path.as_path(),
+			Arc::new(Miner::with_spec(get_test_spec())),
+			false
+		);
 		assert!(service.is_ok());
 	}
 }

ethcore/src/state.rs

@@ -208,12 +208,17 @@ impl State {
 		self.require(a, false).set_storage(key, value)
 	}
 
-	/// Initialise the code of account `a` so that it is `value` for `key`.
+	/// Initialise the code of account `a` so that it is `code`.
 	/// NOTE: Account should have been created with `new_contract`.
 	pub fn init_code(&mut self, a: &Address, code: Bytes) {
 		self.require_or_from(a, true, || Account::new_contract(0.into(), self.account_start_nonce), |_|{}).init_code(code);
 	}
 
+	/// Reset the code of account `a` so that it is `code`.
+	pub fn reset_code(&mut self, a: &Address, code: Bytes) {
+		self.require_or_from(a, true, || Account::new_contract(0.into(), self.account_start_nonce), |_|{}).reset_code(code);
+	}	
+
 	/// Execute a given transaction.
 	/// This will change the state accordingly.
 	pub fn apply(&mut self, env_info: &EnvInfo, engine: &Engine, vm_factory: &EvmFactory, t: &SignedTransaction, tracing: bool) -> ApplyResult {

ethcore/src/tests/client.rs

@@ -24,7 +24,7 @@ use miner::Miner;
 #[test]
 fn imports_from_empty() {
 	let dir = RandomTempPath::new();
-	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::default()), IoChannel::disconnected()).unwrap();
+	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::with_spec(get_test_spec())), IoChannel::disconnected()).unwrap();
 	client.import_verified_blocks(&IoChannel::disconnected());
 	client.flush_queue();
 }
@@ -42,7 +42,7 @@ fn returns_state_root_basic() {
 #[test]
 fn imports_good_block() {
 	let dir = RandomTempPath::new();
-	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::default()), IoChannel::disconnected()).unwrap();
+	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::with_spec(get_test_spec())), IoChannel::disconnected()).unwrap();
 	let good_block = get_good_dummy_block();
 	if let Err(_) = client.import_block(good_block) {
 		panic!("error importing block being good by definition");
@@ -57,7 +57,7 @@ fn imports_good_block() {
 #[test]
 fn query_none_block() {
 	let dir = RandomTempPath::new();
-	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::default()), IoChannel::disconnected()).unwrap();
+	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::with_spec(get_test_spec())), IoChannel::disconnected()).unwrap();
 
     let non_existant = client.block_header(BlockID::Number(188));
 	assert!(non_existant.is_none());

ethcore/src/tests/helpers.rs

@@ -17,7 +17,7 @@
 use client::{BlockChainClient, Client, ClientConfig};
 use common::*;
 use spec::*;
-use block::{OpenBlock};
+use block::{OpenBlock, Drain};
 use blockchain::{BlockChain, Config as BlockChainConfig};
 use state::*;
 use evm::Schedule;
@@ -151,7 +151,7 @@ pub fn generate_dummy_client_with_spec_and_data<F>(get_test_spec: F, block_numbe
 	let dir = RandomTempPath::new();
 
 	let test_spec = get_test_spec();
-	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::default()), IoChannel::disconnected()).unwrap();
+	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::with_spec(get_test_spec())), IoChannel::disconnected()).unwrap();
 	let test_engine = &test_spec.engine;
 
 	let mut db_result = get_temp_journal_db();
@@ -250,7 +250,7 @@ pub fn push_blocks_to_client(client: &Arc<Client>, timestamp_salt: u64, starting
 
 pub fn get_test_client_with_blocks(blocks: Vec<Bytes>) -> GuardedTempResult<Arc<Client>> {
 	let dir = RandomTempPath::new();
-	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::default()), IoChannel::disconnected()).unwrap();
+	let client = Client::new(ClientConfig::default(), get_test_spec(), dir.as_path(), Arc::new(Miner::with_spec(get_test_spec())), IoChannel::disconnected()).unwrap();
 	for block in &blocks {
 		if let Err(_) = client.import_block(block.clone()) {
 			panic!("panic importing block which is well-formed");
@@ -303,7 +303,7 @@ pub fn generate_dummy_empty_blockchain() -> GuardedTempResult<BlockChain> {
 
 pub fn get_temp_journal_db() -> GuardedTempResult<Box<JournalDB>> {
 	let temp = RandomTempPath::new();
-	let journal_db = journaldb::new(temp.as_str(), journaldb::Algorithm::EarlyMerge, None);
+	let journal_db = journaldb::new(temp.as_str(), journaldb::Algorithm::EarlyMerge, DatabaseConfig::default());
 	GuardedTempResult {
 		_temp: temp,
 		result: Some(journal_db)
@@ -320,7 +320,7 @@ pub fn get_temp_state() -> GuardedTempResult<State> {
 }
 
 pub fn get_temp_journal_db_in(path: &Path) -> Box<JournalDB> {
-	journaldb::new(path.to_str().unwrap(), journaldb::Algorithm::EarlyMerge, None)
+	journaldb::new(path.to_str().unwrap(), journaldb::Algorithm::EarlyMerge, DatabaseConfig::default())
 }
 
 pub fn get_temp_state_in(path: &Path) -> State {

ethcore/src/verification/canon_verifier.rs

@@ -24,11 +24,11 @@ use super::verification;
 pub struct CanonVerifier;
 
 impl Verifier for CanonVerifier {
-	fn verify_block_family(header: &Header, bytes: &[u8], engine: &Engine, bc: &BlockProvider) -> Result<(), Error> {
+	fn verify_block_family(&self, header: &Header, bytes: &[u8], engine: &Engine, bc: &BlockProvider) -> Result<(), Error> {
 		verification::verify_block_family(header, bytes, engine, bc)
 	}
 
-	fn verify_block_final(expected: &Header, got: &Header) -> Result<(), Error> {
+	fn verify_block_final(&self, expected: &Header, got: &Header) -> Result<(), Error> {
 		verification::verify_block_final(expected, got)
 	}
 }

ethcore/src/verification/mod.rs

@@ -17,11 +17,32 @@
 pub mod verification;
 pub mod verifier;
 mod canon_verifier;
-#[cfg(test)]
 mod noop_verifier;
 
 pub use self::verification::*;
 pub use self::verifier::Verifier;
 pub use self::canon_verifier::CanonVerifier;
-#[cfg(test)]
 pub use self::noop_verifier::NoopVerifier;
+
+/// Verifier type.
+#[derive(Debug)]
+pub enum VerifierType {
+	/// Verifies block normally.
+	Canon,
+	/// Does not verify block at all.
+	/// Used in tests.
+	Noop,
+}
+
+impl Default for VerifierType {
+	fn default() -> Self {
+		VerifierType::Canon
+	}
+}
+
+pub fn new(v: VerifierType) -> Box<Verifier> {
+	match v {
+		VerifierType::Canon => Box::new(CanonVerifier),
+		VerifierType::Noop => Box::new(NoopVerifier),
+	}
+}

ethcore/src/verification/noop_verifier.rs

@@ -24,11 +24,11 @@ use super::Verifier;
 pub struct NoopVerifier;
 
 impl Verifier for NoopVerifier {
-	fn verify_block_family(_header: &Header, _bytes: &[u8], _engine: &Engine, _bc: &BlockProvider) -> Result<(), Error> {
+	fn verify_block_family(&self, _header: &Header, _bytes: &[u8], _engine: &Engine, _bc: &BlockProvider) -> Result<(), Error> {
 		Ok(())
 	}
 
-	fn verify_block_final(_expected: &Header, _got: &Header) -> Result<(), Error> {
+	fn verify_block_final(&self, _expected: &Header, _got: &Header) -> Result<(), Error> {
 		Ok(())
 	}
 }

ethcore/src/verification/verifier.rs

@@ -21,6 +21,6 @@ use header::Header;
 
 /// Should be used to verify blocks.
 pub trait Verifier: Send + Sync {
-	fn verify_block_family(header: &Header, bytes: &[u8], engine: &Engine, bc: &BlockProvider) -> Result<(), Error>;
+	fn verify_block_family(&self, header: &Header, bytes: &[u8], engine: &Engine, bc: &BlockProvider) -> Result<(), Error>;
-	fn verify_block_final(expected: &Header, got: &Header) -> Result<(), Error>;
+	fn verify_block_final(&self, expected: &Header, got: &Header) -> Result<(), Error>;
 }

ethcore/src/views.rs

@@ -1,339 +0,0 @@
-// 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/>.
-
-//! Block oriented views onto rlp.
-use util::*;
-use header::*;
-use transaction::*;
-
-/// View onto transaction rlp.
-pub struct TransactionView<'a> {
-	rlp: Rlp<'a>
-}
-
-impl<'a> TransactionView<'a> {
-	/// Creates new view onto block from raw bytes.
-	pub fn new(bytes: &'a [u8]) -> TransactionView<'a> {
-		TransactionView {
-			rlp: Rlp::new(bytes)
-		}
-	}
-
-	/// Creates new view onto block from rlp.
-	pub fn new_from_rlp(rlp: Rlp<'a>) -> TransactionView<'a> {
-		TransactionView {
-			rlp: rlp
-		}
-	}
-
-	/// Return reference to underlaying rlp.
-	pub fn rlp(&self) -> &Rlp<'a> {
-		&self.rlp
-	}
-
-	/// Get the nonce field of the transaction.
-	pub fn nonce(&self) -> U256 { self.rlp.val_at(0) }
-
-	/// Get the gas_price field of the transaction.
-	pub fn gas_price(&self) -> U256 { self.rlp.val_at(1) }
-
-	/// Get the gas field of the transaction.
-	pub fn gas(&self) -> U256 { self.rlp.val_at(2) }
-
-	/// Get the value field of the transaction.
-	pub fn value(&self) -> U256 { self.rlp.val_at(4) }
-
-	/// Get the data field of the transaction.
-	pub fn data(&self) -> Bytes { self.rlp.val_at(5) }
-
-	/// Get the v field of the transaction.
-	pub fn v(&self) -> u8 { let r: u16 = self.rlp.val_at(6); r as u8 }
-
-	/// Get the r field of the transaction.
-	pub fn r(&self) -> U256 { self.rlp.val_at(7) }
-
-	/// Get the s field of the transaction.
-	pub fn s(&self) -> U256 { self.rlp.val_at(8) }
-
-	// TODO: something like pub fn action(&self) -> Action { self.rlp.val_at(3) }
-}
-
-impl<'a> Hashable for TransactionView<'a> {
-	fn sha3(&self) -> H256 {
-		self.rlp.as_raw().sha3()
-	}
-}
-
-/// View onto transaction rlp.
-pub struct AccountView<'a> {
-	rlp: Rlp<'a>
-}
-
-impl<'a> AccountView<'a> {
-	/// Creates new view onto block from raw bytes.
-	pub fn new(bytes: &'a [u8]) -> AccountView<'a> {
-		AccountView {
-			rlp: Rlp::new(bytes)
-		}
-	}
-
-	/// Creates new view onto block from rlp.
-	pub fn new_from_rlp(rlp: Rlp<'a>) -> AccountView<'a> {
-		AccountView {
-			rlp: rlp
-		}
-	}
-
-	/// Return reference to underlaying rlp.
-	pub fn rlp(&self) -> &Rlp<'a> {
-		&self.rlp
-	}
-
-	/// Get the nonce field of the transaction.
-	pub fn nonce(&self) -> U256 { self.rlp.val_at(0) }
-
-	/// Get the gas_price field of the transaction.
-	pub fn balance(&self) -> U256 { self.rlp.val_at(1) }
-
-	/// Get the gas field of the transaction.
-	pub fn storage_root(&self) -> H256 { self.rlp.val_at(2) }
-
-	/// Get the value field of the transaction.
-	pub fn code_hash(&self) -> H256 { self.rlp.val_at(3) }
-}
-
-/// View onto block rlp.
-pub struct BlockView<'a> {
-	rlp: Rlp<'a>
-}
-
-impl<'a> BlockView<'a> {
-	/// Creates new view onto block from raw bytes.
-	pub fn new(bytes: &'a [u8]) -> BlockView<'a> {
-		BlockView {
-			rlp: Rlp::new(bytes)
-		}
-	}
-
-	/// Creates new view onto block from rlp.
-	pub fn new_from_rlp(rlp: Rlp<'a>) -> BlockView<'a> {
-		BlockView {
-			rlp: rlp
-		}
-	}
-
-	/// Return reference to underlaying rlp.
-	pub fn rlp(&self) -> &Rlp<'a> {
-		&self.rlp
-	}
-
-	/// Create new Header object from header rlp.
-	pub fn header(&self) -> Header {
-		self.rlp.val_at(0)
-	}
-
-	/// Create new header view obto block head rlp.
-	pub fn header_view(&self) -> HeaderView<'a> {
-		HeaderView::new_from_rlp(self.rlp.at(0))
-	}
-
-	/// Return List of transactions in given block.
-	pub fn transactions(&self) -> Vec<SignedTransaction> {
-		self.rlp.val_at(1)
-	}
-
-	/// Return List of transactions with additional localization info.
-	pub fn localized_transactions(&self) -> Vec<LocalizedTransaction> {
-		let header = self.header_view();
-		let block_hash = header.sha3();
-		let block_number = header.number();
-		self.transactions()
-			.into_iter()
-			.enumerate()
-			.map(|(i, t)| LocalizedTransaction {
-				signed: t,
-				block_hash: block_hash.clone(),
-				block_number: block_number,
-				transaction_index: i
-			}).collect()
-	}
-
-	/// Return number of transactions in given block, without deserializing them.
-	pub fn transactions_count(&self) -> usize {
-		self.rlp.at(1).iter().count()
-	}
-
-	/// Return List of transactions in given block.
-	pub fn transaction_views(&self) -> Vec<TransactionView> {
-		self.rlp.at(1).iter().map(TransactionView::new_from_rlp).collect()
-	}
-
-	/// Return transaction hashes.
-	pub fn transaction_hashes(&self) -> Vec<H256> {
-		self.rlp.at(1).iter().map(|rlp| rlp.as_raw().sha3()).collect()
-	}
-
-	/// Returns transaction at given index without deserializing unnecessary data.
-	pub fn transaction_at(&self, index: usize) -> Option<SignedTransaction> {
-		self.rlp.at(1).iter().nth(index).map(|rlp| rlp.as_val())
-	}
-
-	/// Returns localized transaction at given index.
-	pub fn localized_transaction_at(&self, index: usize) -> Option<LocalizedTransaction> {
-		let header = self.header_view();
-		let block_hash = header.sha3();
-		let block_number = header.number();
-		self.transaction_at(index).map(|t| LocalizedTransaction {
-			signed: t,
-			block_hash: block_hash,
-			block_number: block_number,
-			transaction_index: index
-		})
-	}
-
-	/// Return list of uncles of given block.
-	pub fn uncles(&self) -> Vec<Header> {
-		self.rlp.val_at(2)
-	}
-
-	/// Return number of uncles in given block, without deserializing them.
-	pub fn uncles_count(&self) -> usize {
-		self.rlp.at(2).iter().count()
-	}
-
-	/// Return List of transactions in given block.
-	pub fn uncle_views(&self) -> Vec<HeaderView> {
-		self.rlp.at(2).iter().map(HeaderView::new_from_rlp).collect()
-	}
-
-	/// Return list of uncle hashes of given block.
-	pub fn uncle_hashes(&self) -> Vec<H256> {
-		self.rlp.at(2).iter().map(|rlp| rlp.as_raw().sha3()).collect()
-	}
-
-	/// Return nth uncle.
-	pub fn uncle_at(&self, index: usize) -> Option<Header> {
-		self.rlp.at(2).iter().nth(index).map(|rlp| rlp.as_val())
-	}
-}
-
-impl<'a> Hashable for BlockView<'a> {
-	fn sha3(&self) -> H256 {
-		self.header_view().sha3()
-	}
-}
-
-/// View onto block header rlp.
-pub struct HeaderView<'a> {
-	rlp: Rlp<'a>
-}
-
-impl<'a> HeaderView<'a> {
-	/// Creates new view onto header from raw bytes.
-	pub fn new(bytes: &'a [u8]) -> HeaderView<'a> {
-		HeaderView {
-			rlp: Rlp::new(bytes)
-		}
-	}
-
-	/// Creates new view onto header from rlp.
-	pub fn new_from_rlp(rlp: Rlp<'a>) -> HeaderView<'a> {
-		HeaderView {
-			rlp: rlp
-		}
-	}
-
-	/// Returns header hash.
-	pub fn hash(&self) -> H256 { self.sha3() }
-
-	/// Returns raw rlp.
-	pub fn rlp(&self) -> &Rlp<'a> { &self.rlp }
-
-	/// Returns parent hash.
-	pub fn parent_hash(&self) -> H256 { self.rlp.val_at(0) }
-
-	/// Returns uncles hash.
-	pub fn uncles_hash(&self) -> H256 { self.rlp.val_at(1) }
-
-	/// Returns author.
-	pub fn author(&self) -> Address { self.rlp.val_at(2) }
-
-	/// Returns state root.
-	pub fn state_root(&self) -> H256 { self.rlp.val_at(3) }
-
-	/// Returns transactions root.
-	pub fn transactions_root(&self) -> H256 { self.rlp.val_at(4) }
-
-	/// Returns block receipts root.
-	pub fn receipts_root(&self) -> H256 { self.rlp.val_at(5) }
-
-	/// Returns block log bloom.
-	pub fn log_bloom(&self) -> H2048 { self.rlp.val_at(6) }
-
-	/// Returns block difficulty.
-	pub fn difficulty(&self) -> U256 { self.rlp.val_at(7) }
-
-	/// Returns block number.
-	pub fn number(&self) -> BlockNumber { self.rlp.val_at(8) }
-
-	/// Returns block gas limit.
-	pub fn gas_limit(&self) -> U256 { self.rlp.val_at(9) }
-
-	/// Returns block gas used.
-	pub fn gas_used(&self) -> U256 { self.rlp.val_at(10) }
-
-	/// Returns timestamp.
-	pub fn timestamp(&self) -> u64 { self.rlp.val_at(11) }
-
-	/// Returns block extra data.
-	pub fn extra_data(&self) -> Bytes { self.rlp.val_at(12) }
-
-	/// Returns a vector of post-RLP-encoded seal fields.
-	pub fn seal(&self) -> Vec<Bytes> {
-		let mut seal = vec![];
-		for i in 13..self.rlp.item_count() {
-			seal.push(self.rlp.at(i).as_raw().to_vec());
-		}
-		seal
-	}
-}
-
-impl<'a> Hashable for HeaderView<'a> {
-	fn sha3(&self) -> H256 {
-		self.rlp.as_raw().sha3()
-	}
-}
-
-#[cfg(test)]
-mod tests {
-	use rustc_serialize::hex::FromHex;
-	use super::BlockView;
-
-	#[test]
-	fn test_header_view_seal_fields() {
-		// that's rlp of block created with ethash engine.
-		let block_rlp = "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".from_hex().unwrap();
-		let mix_hash = "a0a0349d8c3df71f1a48a9df7d03fd5f14aeee7d91332c009ecaff0a71ead405bd".from_hex().unwrap();
-		let nonce = "88ab4e252a7e8c2a23".from_hex().unwrap();
-
-		let block_view = BlockView::new(&block_rlp);
-		let header_view = block_view.header_view();
-		let seal_fields = header_view.seal();
-		assert_eq!(seal_fields.len(), 2);
-		assert_eq!(seal_fields[0], mix_hash);
-		assert_eq!(seal_fields[1], nonce);
-	}
-}

ethcore/src/views/block.rs

@@ -0,0 +1,167 @@
+// 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/>.
+
+//! View onto block rlp.
+
+use util::*;
+use header::*;
+use transaction::*;
+use super::{TransactionView, HeaderView};
+
+/// View onto block rlp.
+pub struct BlockView<'a> {
+	rlp: Rlp<'a>
+}
+
+impl<'a> BlockView<'a> {
+	/// Creates new view onto block from raw bytes.
+	pub fn new(bytes: &'a [u8]) -> BlockView<'a> {
+		BlockView {
+			rlp: Rlp::new(bytes)
+		}
+	}
+
+	/// Creates new view onto block from rlp.
+	pub fn new_from_rlp(rlp: Rlp<'a>) -> BlockView<'a> {
+		BlockView {
+			rlp: rlp
+		}
+	}
+
+	/// Block header hash.
+	pub fn hash(&self) -> H256 {
+		self.sha3()
+	}
+
+	/// Return reference to underlaying rlp.
+	pub fn rlp(&self) -> &Rlp<'a> {
+		&self.rlp
+	}
+
+	/// Create new Header object from header rlp.
+	pub fn header(&self) -> Header {
+		self.rlp.val_at(0)
+	}
+
+	/// Create new header view obto block head rlp.
+	pub fn header_view(&self) -> HeaderView<'a> {
+		HeaderView::new_from_rlp(self.rlp.at(0))
+	}
+
+	/// Return List of transactions in given block.
+	pub fn transactions(&self) -> Vec<SignedTransaction> {
+		self.rlp.val_at(1)
+	}
+
+	/// Return List of transactions with additional localization info.
+	pub fn localized_transactions(&self) -> Vec<LocalizedTransaction> {
+		let header = self.header_view();
+		let block_hash = header.sha3();
+		let block_number = header.number();
+		self.transactions()
+			.into_iter()
+			.enumerate()
+			.map(|(i, t)| LocalizedTransaction {
+				signed: t,
+				block_hash: block_hash.clone(),
+				block_number: block_number,
+				transaction_index: i
+			}).collect()
+	}
+
+	/// Return number of transactions in given block, without deserializing them.
+	pub fn transactions_count(&self) -> usize {
+		self.rlp.at(1).iter().count()
+	}
+
+	/// Return List of transactions in given block.
+	pub fn transaction_views(&self) -> Vec<TransactionView> {
+		self.rlp.at(1).iter().map(TransactionView::new_from_rlp).collect()
+	}
+
+	/// Return transaction hashes.
+	pub fn transaction_hashes(&self) -> Vec<H256> {
+		self.rlp.at(1).iter().map(|rlp| rlp.as_raw().sha3()).collect()
+	}
+
+	/// Returns transaction at given index without deserializing unnecessary data.
+	pub fn transaction_at(&self, index: usize) -> Option<SignedTransaction> {
+		self.rlp.at(1).iter().nth(index).map(|rlp| rlp.as_val())
+	}
+
+	/// Returns localized transaction at given index.
+	pub fn localized_transaction_at(&self, index: usize) -> Option<LocalizedTransaction> {
+		let header = self.header_view();
+		let block_hash = header.sha3();
+		let block_number = header.number();
+		self.transaction_at(index).map(|t| LocalizedTransaction {
+			signed: t,
+			block_hash: block_hash,
+			block_number: block_number,
+			transaction_index: index
+		})
+	}
+
+	/// Return list of uncles of given block.
+	pub fn uncles(&self) -> Vec<Header> {
+		self.rlp.val_at(2)
+	}
+
+	/// Return number of uncles in given block, without deserializing them.
+	pub fn uncles_count(&self) -> usize {
+		self.rlp.at(2).iter().count()
+	}
+
+	/// Return List of transactions in given block.
+	pub fn uncle_views(&self) -> Vec<HeaderView> {
+		self.rlp.at(2).iter().map(HeaderView::new_from_rlp).collect()
+	}
+
+	/// Return list of uncle hashes of given block.
+	pub fn uncle_hashes(&self) -> Vec<H256> {
+		self.rlp.at(2).iter().map(|rlp| rlp.as_raw().sha3()).collect()
+	}
+
+	/// Return nth uncle.
+	pub fn uncle_at(&self, index: usize) -> Option<Header> {
+		self.rlp.at(2).iter().nth(index).map(|rlp| rlp.as_val())
+	}
+}
+
+impl<'a> Hashable for BlockView<'a> {
+	fn sha3(&self) -> H256 {
+		self.header_view().sha3()
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use std::str::FromStr;
+	use rustc_serialize::hex::FromHex;
+	use util::H256;
+	use super::BlockView;
+
+	#[test]
+	fn test_block_view() {
+		// that's rlp of block created with ethash engine.
+		let rlp = "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".from_hex().unwrap();
+
+		let view = BlockView::new(&rlp);
+		assert_eq!(view.hash(), H256::from_str("2c9747e804293bd3f1a986484343f23bc88fd5be75dfe9d5c2860aff61e6f259").unwrap());
+		assert_eq!(view.transactions_count(), 1);
+		assert_eq!(view.uncles_count(), 0);
+	}
+}

ethcore/src/views/header.rs

@@ -0,0 +1,134 @@
+// 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/>.
+
+//! View onto block header rlp
+
+use util::{Rlp, U256, Bytes, Hashable, H256, Address, H2048, View};
+use header::BlockNumber;
+
+/// View onto block header rlp.
+pub struct HeaderView<'a> {
+	rlp: Rlp<'a>
+}
+
+impl<'a> HeaderView<'a> {
+	/// Creates new view onto header from raw bytes.
+	pub fn new(bytes: &'a [u8]) -> HeaderView<'a> {
+		HeaderView {
+			rlp: Rlp::new(bytes)
+		}
+	}
+
+	/// Creates new view onto header from rlp.
+	pub fn new_from_rlp(rlp: Rlp<'a>) -> HeaderView<'a> {
+		HeaderView {
+			rlp: rlp
+		}
+	}
+
+	/// Returns header hash.
+	pub fn hash(&self) -> H256 { self.sha3() }
+
+	/// Returns raw rlp.
+	pub fn rlp(&self) -> &Rlp<'a> { &self.rlp }
+
+	/// Returns parent hash.
+	pub fn parent_hash(&self) -> H256 { self.rlp.val_at(0) }
+
+	/// Returns uncles hash.
+	pub fn uncles_hash(&self) -> H256 { self.rlp.val_at(1) }
+
+	/// Returns author.
+	pub fn author(&self) -> Address { self.rlp.val_at(2) }
+
+	/// Returns state root.
+	pub fn state_root(&self) -> H256 { self.rlp.val_at(3) }
+
+	/// Returns transactions root.
+	pub fn transactions_root(&self) -> H256 { self.rlp.val_at(4) }
+
+	/// Returns block receipts root.
+	pub fn receipts_root(&self) -> H256 { self.rlp.val_at(5) }
+
+	/// Returns block log bloom.
+	pub fn log_bloom(&self) -> H2048 { self.rlp.val_at(6) }
+
+	/// Returns block difficulty.
+	pub fn difficulty(&self) -> U256 { self.rlp.val_at(7) }
+
+	/// Returns block number.
+	pub fn number(&self) -> BlockNumber { self.rlp.val_at(8) }
+
+	/// Returns block gas limit.
+	pub fn gas_limit(&self) -> U256 { self.rlp.val_at(9) }
+
+	/// Returns block gas used.
+	pub fn gas_used(&self) -> U256 { self.rlp.val_at(10) }
+
+	/// Returns timestamp.
+	pub fn timestamp(&self) -> u64 { self.rlp.val_at(11) }
+
+	/// Returns block extra data.
+	pub fn extra_data(&self) -> Bytes { self.rlp.val_at(12) }
+
+	/// Returns a vector of post-RLP-encoded seal fields.
+	pub fn seal(&self) -> Vec<Bytes> {
+		let mut seal = vec![];
+		for i in 13..self.rlp.item_count() {
+			seal.push(self.rlp.at(i).as_raw().to_vec());
+		}
+		seal
+	}
+}
+
+impl<'a> Hashable for HeaderView<'a> {
+	fn sha3(&self) -> H256 {
+		self.rlp.as_raw().sha3()
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use std::str::FromStr;
+	use rustc_serialize::hex::FromHex;
+	use util::{H256, Address, H2048, U256};
+	use super::HeaderView;
+
+	#[test]
+	fn test_header_view() {
+		// that's rlp of block header created with ethash engine.
+		let rlp = "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".from_hex().unwrap();
+		let mix_hash = "a0a0349d8c3df71f1a48a9df7d03fd5f14aeee7d91332c009ecaff0a71ead405bd".from_hex().unwrap();
+		let nonce = "88ab4e252a7e8c2a23".from_hex().unwrap();
+
+		let view = HeaderView::new(&rlp);
+		assert_eq!(view.hash(), H256::from_str("2c9747e804293bd3f1a986484343f23bc88fd5be75dfe9d5c2860aff61e6f259").unwrap());
+		assert_eq!(view.parent_hash(), H256::from_str("d405da4e66f1445d455195229624e133f5baafe72b5cf7b3c36c12c8146e98b7").unwrap());
+		assert_eq!(view.uncles_hash(), H256::from_str("1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347").unwrap());
+		assert_eq!(view.author(), Address::from_str("8888f1f195afa192cfee860698584c030f4c9db1").unwrap());
+		assert_eq!(view.state_root(), H256::from_str("5fb2b4bfdef7b314451cb138a534d225c922fc0e5fbe25e451142732c3e25c25").unwrap());
+		assert_eq!(view.transactions_root(), H256::from_str("88d2ec6b9860aae1a2c3b299f72b6a5d70d7f7ba4722c78f2c49ba96273c2158").unwrap());
+		assert_eq!(view.receipts_root(), H256::from_str("07c6fdfa8eea7e86b81f5b0fc0f78f90cc19f4aa60d323151e0cac660199e9a1").unwrap());
+		assert_eq!(view.log_bloom(), H2048::default());
+		assert_eq!(view.difficulty(), U256::from(0x02_00_80));
+		assert_eq!(view.number(), 3);
+		assert_eq!(view.gas_limit(), U256::from(0x2f_ef_ba));
+		assert_eq!(view.gas_used(), U256::from(0x52_4d));
+		assert_eq!(view.timestamp(), 0x56_8e_93_2a);
+		assert_eq!(view.extra_data(), vec![] as Vec<u8>);
+		assert_eq!(view.seal(), vec![mix_hash, nonce]);
+	}
+}

ethcore/src/views/mod.rs

@@ -0,0 +1,25 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Block oriented views onto rlp.
+
+mod block;
+mod header;
+mod transaction;
+
+pub use self::block::BlockView;
+pub use self::header::HeaderView;
+pub use self::transaction::TransactionView;

ethcore/src/views/transaction.rs

@@ -0,0 +1,97 @@
+// 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/>.
+
+//! View onto transaction rlp
+use util::{Rlp, U256, Bytes, Hashable, H256, View};
+
+/// View onto transaction rlp.
+pub struct TransactionView<'a> {
+	rlp: Rlp<'a>
+}
+
+impl<'a> TransactionView<'a> {
+	/// Creates new view onto block from raw bytes.
+	pub fn new(bytes: &'a [u8]) -> TransactionView<'a> {
+		TransactionView {
+			rlp: Rlp::new(bytes)
+		}
+	}
+
+	/// Creates new view onto block from rlp.
+	pub fn new_from_rlp(rlp: Rlp<'a>) -> TransactionView<'a> {
+		TransactionView {
+			rlp: rlp
+		}
+	}
+
+	/// Return reference to underlaying rlp.
+	pub fn rlp(&self) -> &Rlp<'a> {
+		&self.rlp
+	}
+
+	/// Get the nonce field of the transaction.
+	pub fn nonce(&self) -> U256 { self.rlp.val_at(0) }
+
+	/// Get the gas_price field of the transaction.
+	pub fn gas_price(&self) -> U256 { self.rlp.val_at(1) }
+
+	/// Get the gas field of the transaction.
+	pub fn gas(&self) -> U256 { self.rlp.val_at(2) }
+
+	/// Get the value field of the transaction.
+	pub fn value(&self) -> U256 { self.rlp.val_at(4) }
+
+	/// Get the data field of the transaction.
+	pub fn data(&self) -> Bytes { self.rlp.val_at(5) }
+
+	/// Get the v field of the transaction.
+	pub fn v(&self) -> u8 { let r: u16 = self.rlp.val_at(6); r as u8 }
+
+	/// Get the r field of the transaction.
+	pub fn r(&self) -> U256 { self.rlp.val_at(7) }
+
+	/// Get the s field of the transaction.
+	pub fn s(&self) -> U256 { self.rlp.val_at(8) }
+}
+
+impl<'a> Hashable for TransactionView<'a> {
+	fn sha3(&self) -> H256 {
+		self.rlp.as_raw().sha3()
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use std::str::FromStr;
+	use rustc_serialize::hex::FromHex;
+	use util::U256;
+	use super::TransactionView;
+
+	#[test]
+	fn test_transaction_view() {
+		let rlp = "f87c80018261a894095e7baea6a6c7c4c2dfeb977efac326af552d870a9d00000000000000000000000000000000000000000000000000000000001ba048b55bfa915ac795c431978d8a6a992b628d557da5ff759b307d495a36649353a0efffd310ac743f371de3b9f7f9cb56c0b28ad43601b4ab949f53faa07bd2c804".from_hex().unwrap();
+
+		let view = TransactionView::new(&rlp);
+		assert_eq!(view.nonce(), U256::from(0));
+		assert_eq!(view.gas_price(), U256::from(1));
+		assert_eq!(view.gas(), U256::from(0x61a8));
+		assert_eq!(view.value(), U256::from(0xa));
+		assert_eq!(view.data(), "0000000000000000000000000000000000000000000000000000000000".from_hex().unwrap());
+		assert_eq!(view.r(), U256::from_str("48b55bfa915ac795c431978d8a6a992b628d557da5ff759b307d495a36649353").unwrap());
+		assert_eq!(view.s(), U256::from_str("efffd310ac743f371de3b9f7f9cb56c0b28ad43601b4ab949f53faa07bd2c804").unwrap());
+		assert_eq!(view.v(), 0x1b);
+	}
+}

install-parity.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-PARITY_DEB_URL=https://github.com/ethcore/parity/releases/download/v1.2.0/parity_linux_1.2.0-0_amd64.deb
+PARITY_DEB_URL=https://github.com/ethcore/parity/releases/download/v1.2.1/parity_linux_1.2.1-0_amd64.deb
 
 
 function run_installer()

parity/cli.rs

@@ -42,14 +42,12 @@ Protocol Options:
   --keys-path PATH         Specify the path for JSON key files to be found
                            [default: $HOME/.parity/keys].
   --identity NAME          Specify your node's name.
-
+  --fork POLICY            Specifies the client's fork policy. POLICY must be
-DAO-Rescue Soft-fork Options:
+                           one of:
-  --help-rescue-dao        Does nothing - on by default.
+                           dogmatic - sticks rigidly to the standard chain.
-  --dont-help-rescue-dao   Votes against the DAO-rescue soft-fork, but supports
+                           dao-soft - votes for the DAO-rescue soft-fork.
-                           it if it is triggered anyway.
+                           normal - goes with whatever fork is decided but
-                           Equivalent to --gas-floor-target=3141592.
+                           votes for none. [default: normal].
-  --dogmatic               Ignores all DAO-rescue soft-fork behaviour. Even if
-                           it means losing mining rewards.
 
 Account Options:
   --unlock ACCOUNTS        Unlock ACCOUNTS for the duration of the execution.
@@ -133,6 +131,29 @@ Sealing/Mining Options:
                            NOTE: MINING WILL NOT WORK WITHOUT THIS OPTION.
   --force-sealing          Force the node to author new blocks as if it were
                            always sealing/mining.
+  --reseal-on-txs SET      Specify which transactions should force the node
+                           to reseal a block. SET is one of:
+                           none - never reseal on new transactions;
+                           own - reseal only on a new local transaction;
+                           ext - reseal only on a new external transaction;
+                           all - reseal on all new transactions [default: all].
+  --reseal-min-period MS   Specify the minimum time between reseals from 
+                           incoming transactions. MS is time measured in
+                           milliseconds [default: 2000].
+  --work-queue-size ITEMS  Specify the number of historical work packages
+                           which are kept cached lest a solution is found for 
+                           them later. High values take more memory but result
+                           in fewer unusable solutions [default: 20].
+  --tx-gas-limit GAS       Apply a limit of GAS as the maximum amount of gas
+                           a single transaction may have for it to be mined.
+  --relay-set SET          Set of transactions to relay. SET may be:
+                           cheap - Relay any transaction in the queue (this
+                           may include invalid transactions);
+                           strict - Relay only executed transactions (this
+                           guarantees we don't relay invalid transactions, but
+                           means we relay nothing if not mining);
+                           lenient - Same as strict when mining, and cheap
+                           when not [default: cheap].
   --usd-per-tx USD         Amount of USD to be paid for a basic transaction
                            [default: 0.005]. The minimum gas price is set
                            accordingly.
@@ -141,13 +162,19 @@ Sealing/Mining Options:
                            web service in turn and fallback on the last known
                            good value [default: auto].
   --gas-floor-target GAS   Amount of gas per block to target when sealing a new
-                           block [default: 3141592].
+                           block [default: 4700000].
   --gas-cap GAS            A cap on how large we will raise the gas limit per
-                           block due to transaction volume [default: 3141592].
+                           block due to transaction volume [default: 6283184].
   --extra-data STRING      Specify a custom extra-data for authored blocks, no
                            more than 32 characters.
-  --tx-limit LIMIT         Limit of transactions kept in the queue (waiting to
+  --tx-queue-size LIMIT    Maximum amount of transactions in the queue (waiting
-                           be included in next block) [default: 1024].
+                           to be included in next block) [default: 1024].
+  --remove-solved          Move solved blocks from the work package queue
+                           instead of cloning them. This gives a slightly
+                           faster import speed, but means that extra solutions
+                           submitted for the same work package will go unused.
+  --notify-work URLS       URLs to which work package notifications are pushed.
+                           URLS should be a comma-delimited list of HTTP URLs.
 
 Footprint Options:
   --tracing BOOL           Indicates if full transaction tracing should be
@@ -170,7 +197,12 @@ Footprint Options:
   --cache MEGABYTES        Set total amount of discretionary memory to use for
                            the entire system, overrides other cache and queue
                            options.
-  --db-cache-size MB       Database cache size.
+
+Database Options:
+  --db-cache-size MB       Override RocksDB database cache size.
+  --db-compaction TYPE     Database compaction type. TYPE may be one of:
+                           ssd - suitable for SSDs and fast HDDs;
+                           hdd - suitable for slow HDDs [default: ssd].
 
 Import/Export Options:
   --from BLOCK             Export from block BLOCK, which may be an index or
@@ -241,8 +273,7 @@ pub struct Args {
 	pub flag_chain: String,
 	pub flag_db_path: String,
 	pub flag_identity: String,
-	pub flag_dont_help_rescue_dao: bool,
+	pub flag_fork: String,
-	pub flag_dogmatic: bool,
 	pub flag_unlock: Option<String>,
 	pub flag_password: Vec<String>,
 	pub flag_cache: Option<usize>,
@@ -283,13 +314,20 @@ pub struct Args {
 	pub flag_signer_path: String,
 	pub flag_no_token: bool,
 	pub flag_force_sealing: bool,
+	pub flag_reseal_on_txs: String,
+	pub flag_reseal_min_period: u64,
+	pub flag_work_queue_size: usize,
+	pub flag_remove_solved: bool,
+	pub flag_tx_gas_limit: Option<String>,
+	pub flag_relay_set: String,
 	pub flag_author: Option<String>,
 	pub flag_usd_per_tx: String,
 	pub flag_usd_per_eth: String,
 	pub flag_gas_floor_target: String,
 	pub flag_gas_cap: String,
 	pub flag_extra_data: Option<String>,
-	pub flag_tx_limit: usize,
+	pub flag_tx_queue_size: usize,
+	pub flag_notify_work: Option<String>,
 	pub flag_logging: Option<String>,
 	pub flag_version: bool,
 	pub flag_from: String,
@@ -323,6 +361,7 @@ pub struct Args {
 	pub flag_ipcpath: Option<String>,
 	pub flag_ipcapi: Option<String>,
 	pub flag_db_cache_size: Option<usize>,
+	pub flag_db_compaction: String,
 }
 
 pub fn print_version() {

parity/configuration.rs

@@ -16,6 +16,7 @@
 
 use std::env;
 use std::fs::File;
+use std::time::Duration;
 use std::io::{BufRead, BufReader};
 use std::net::{SocketAddr, IpAddr};
 use std::path::PathBuf;
@@ -24,9 +25,11 @@ use docopt::Docopt;
 
 use die::*;
 use util::*;
+use util::log::Colour::*;
 use ethcore::account_provider::AccountProvider;
 use util::network_settings::NetworkSettings;
-use ethcore::client::{append_path, get_db_path, ClientConfig, Switch, VMType};
+use ethcore::client::{append_path, get_db_path, ClientConfig, DatabaseCompactionProfile, Switch, VMType};
+use ethcore::miner::{MinerOptions, PendingSet};
 use ethcore::ethereum;
 use ethcore::spec::Spec;
 use ethsync::SyncConfig;
@@ -44,6 +47,13 @@ pub struct Directories {
 	pub signer: String,
 }
 
+#[derive(Eq, PartialEq, Debug)]
+pub enum Policy {
+	DaoSoft,
+	Normal,
+	Dogmatic,
+}
+
 impl Configuration {
 	pub fn parse() -> Self {
 		Configuration {
@@ -67,6 +77,45 @@ impl Configuration {
 		self.args.flag_maxpeers.unwrap_or(self.args.flag_peers) as u32
 	}
 
+	fn decode_u256(d: &str, argument: &str) -> U256 {
+		U256::from_dec_str(d).unwrap_or_else(|_|
+			U256::from_str(clean_0x(d)).unwrap_or_else(|_|
+				die!("{}: Invalid numeric value for {}. Must be either a decimal or a hex number.", d, argument)
+			)
+		)
+	}
+
+	fn work_notify(&self) -> Vec<String> {
+		self.args.flag_notify_work.as_ref().map_or_else(Vec::new, |s| s.split(',').map(|s| s.to_owned()).collect())
+	}
+
+	pub fn miner_options(&self) -> MinerOptions {
+		let (own, ext) = match self.args.flag_reseal_on_txs.as_str() {
+			"none" => (false, false),
+			"own" => (true, false),
+			"ext" => (false, true),
+			"all" => (true, true),
+			x => die!("{}: Invalid value for --reseal option. Use --help for more information.", x)
+		};
+		MinerOptions {
+			new_work_notify: self.work_notify(),
+			force_sealing: self.args.flag_force_sealing,
+			reseal_on_external_tx: ext,
+			reseal_on_own_tx: own,
+			tx_gas_limit: self.args.flag_tx_gas_limit.as_ref().map_or(!U256::zero(), |d| Self::decode_u256(d, "--tx-gas-limit")),
+			tx_queue_size: self.args.flag_tx_queue_size,
+			pending_set: match self.args.flag_relay_set.as_str() {
+				"cheap" => PendingSet::AlwaysQueue,
+				"strict" => PendingSet::AlwaysSealing,
+				"lenient" => PendingSet::SealingOrElseQueue,
+				x => die!("{}: Invalid value for --relay-set option. Use --help for more information.", x)
+			},
+			reseal_min_period: Duration::from_millis(self.args.flag_reseal_min_period),
+			work_queue_size: self.args.flag_work_queue_size,
+			enable_resubmission: !self.args.flag_remove_solved,
+		}
+	}
+
 	pub fn author(&self) -> Option<Address> {
 		self.args.flag_etherbase.as_ref()
 			.or(self.args.flag_author.as_ref())
@@ -75,9 +124,18 @@ impl Configuration {
 			}))
 	}
 
+	pub fn policy(&self) -> Policy {
+		match self.args.flag_fork.as_str() {
+			"dao-soft" => Policy::DaoSoft,
+			"normal" => Policy::Normal,
+			"dogmatic" => Policy::Dogmatic,
+			x => die!("{}: Invalid value given for --policy option. Use --help for more info.", x)
+		}
+	}
+
 	pub fn gas_floor_target(&self) -> U256 {
-		if self.args.flag_dont_help_rescue_dao || self.args.flag_dogmatic {
+		if self.policy() == Policy::DaoSoft {
-			4_700_000.into()
+			3_141_592.into()
 		} else {
 			let d = &self.args.flag_gas_floor_target;
 			U256::from_dec_str(d).unwrap_or_else(|_| {
@@ -87,8 +145,8 @@ impl Configuration {
 	}
 
 	pub fn gas_ceil_target(&self) -> U256 {
-		if self.args.flag_dont_help_rescue_dao || self.args.flag_dogmatic {
+		if self.policy() == Policy::DaoSoft {
-			10_000_000.into()
+			3_141_592.into()
 		} else {
 			let d = &self.args.flag_gas_cap;
 			U256::from_dec_str(d).unwrap_or_else(|_| {
@@ -124,7 +182,7 @@ impl Configuration {
 				let wei_per_usd: f32 = 1.0e18 / usd_per_eth;
 				let gas_per_tx: f32 = 21000.0;
 				let wei_per_gas: f32 = wei_per_usd * usd_per_tx / gas_per_tx;
-				info!("Using a conversion rate of Ξ1 = US${} ({} wei/gas)", usd_per_eth, wei_per_gas);
+				info!("Using a conversion rate of Ξ1 = {} ({} wei/gas)", paint(White.bold(), format!("US${}", usd_per_eth)), paint(Yellow.bold(), format!("{}", wei_per_gas)));
 				U256::from_dec_str(&format!("{:.0}", wei_per_gas)).unwrap()
 			}
 		}
@@ -140,7 +198,7 @@ impl Configuration {
 
 	pub fn spec(&self) -> Spec {
 		match self.chain().as_str() {
-			"frontier" | "homestead" | "mainnet" => ethereum::new_frontier(!self.args.flag_dogmatic),
+			"frontier" | "homestead" | "mainnet" => ethereum::new_frontier(self.policy() != Policy::Dogmatic),
 			"morden" | "testnet" => ethereum::new_morden(),
 			"olympic" => ethereum::new_olympic(),
 			f => Spec::load(contents(f).unwrap_or_else(|_| {
@@ -227,7 +285,7 @@ impl Configuration {
 		let mut latest_era = None;
 		let jdb_types = [journaldb::Algorithm::Archive, journaldb::Algorithm::EarlyMerge, journaldb::Algorithm::OverlayRecent, journaldb::Algorithm::RefCounted];
 		for i in jdb_types.into_iter() {
-			let db = journaldb::new(&append_path(&get_db_path(Path::new(&self.path()), *i, spec.genesis_header().hash()), "state"), *i, None);
+			let db = journaldb::new(&append_path(&get_db_path(Path::new(&self.path()), *i, spec.genesis_header().hash()), "state"), *i, kvdb::DatabaseConfig::default());
 			trace!(target: "parity", "Looking for best DB: {} at {:?}", i, db.latest_era());
 			match (latest_era, db.latest_era()) {
 				(Some(best), Some(this)) if best >= this => {}
@@ -278,6 +336,13 @@ impl Configuration {
 		// forced state db cache size if provided
 		client_config.db_cache_size = self.args.flag_db_cache_size.and_then(|cs| Some(cs / 4));
 
+		// compaction profile
+		client_config.db_compaction = match self.args.flag_db_compaction.as_str() {
+			"ssd" => DatabaseCompactionProfile::Default,
+			"hdd" => DatabaseCompactionProfile::HDD,
+			_ => { die!("Invalid compaction profile given (--db-compaction argument), expected hdd/default."); }
+		};
+
 		if self.args.flag_jitvm {
 			client_config.vm_type = VMType::jit().unwrap_or_else(|| die!("Parity built without jit vm."))
 		}

parity/main.rs

@@ -80,7 +80,7 @@ use std::thread::sleep;
 use std::time::Duration;
 use rustc_serialize::hex::FromHex;
 use ctrlc::CtrlC;
-use util::{H256, ToPretty, NetworkConfiguration, PayloadInfo, Bytes, UtilError};
+use util::{H256, ToPretty, NetworkConfiguration, PayloadInfo, Bytes, UtilError, paint, Colour, version};
 use util::panics::{MayPanic, ForwardPanic, PanicHandler};
 use ethcore::client::{BlockID, BlockChainClient, ClientConfig, get_db_path};
 use ethcore::error::{Error, ImportError};
@@ -184,10 +184,12 @@ fn execute_client(conf: Configuration, spec: Spec, client_config: ClientConfig)
 	let panic_handler = PanicHandler::new_in_arc();
 
 	// Setup logging
-	let logger = setup_log::setup_log(&conf.args.flag_logging);
+	let logger = setup_log::setup_log(&conf.args.flag_logging, conf.have_color());
 	// Raise fdlimit
 	unsafe { ::fdlimit::raise_fd_limit(); }
 
+	info!("Starting {}", paint(Colour::White.bold(), format!("{}", version())));
+
 	let net_settings = conf.net_settings(&spec);
 	let sync_config = conf.sync_config(&spec);
 
@@ -208,13 +210,13 @@ fn execute_client(conf: Configuration, spec: Spec, client_config: ClientConfig)
 	let account_service = Arc::new(conf.account_service());
 
 	// Miner
-	let miner = Miner::with_accounts(conf.args.flag_force_sealing, conf.spec(), account_service.clone());
+	let miner = Miner::new(conf.miner_options(), conf.spec(), Some(account_service.clone()));
-	miner.set_author(conf.author().unwrap_or(Default::default()));
+	miner.set_author(conf.author().unwrap_or_default());
 	miner.set_gas_floor_target(conf.gas_floor_target());
 	miner.set_gas_ceil_target(conf.gas_ceil_target());
 	miner.set_extra_data(conf.extra_data());
 	miner.set_minimal_gas_price(conf.gas_price());
-	miner.set_transactions_limit(conf.args.flag_tx_limit);
+	miner.set_transactions_limit(conf.args.flag_tx_queue_size);
 
 	// Build client
 	let mut service = ClientService::start(
@@ -320,6 +322,8 @@ fn execute_export(conf: Configuration) {
 	// Setup panic handler
 	let panic_handler = PanicHandler::new_in_arc();
 
+	// Setup logging
+	let _logger = setup_log::setup_log(&conf.args.flag_logging, conf.have_color());
 	// Raise fdlimit
 	unsafe { ::fdlimit::raise_fd_limit(); }
 
@@ -341,7 +345,7 @@ fn execute_export(conf: Configuration) {
 
 	// Build client
 	let service = ClientService::start(
-		client_config, spec, net_settings, Path::new(&conf.path()), Arc::new(Miner::default()), false
+		client_config, spec, net_settings, Path::new(&conf.path()), Arc::new(Miner::with_spec(conf.spec())), false
 	).unwrap_or_else(|e| die_with_error("Client", e));
 
 	panic_handler.forward_from(&service);
@@ -392,6 +396,8 @@ fn execute_import(conf: Configuration) {
 	// Setup panic handler
 	let panic_handler = PanicHandler::new_in_arc();
 
+	// Setup logging
+	let _logger = setup_log::setup_log(&conf.args.flag_logging, conf.have_color());
 	// Raise fdlimit
 	unsafe { ::fdlimit::raise_fd_limit(); }
 
@@ -413,7 +419,7 @@ fn execute_import(conf: Configuration) {
 
 	// Build client
 	let service = ClientService::start(
-		client_config, spec, net_settings, Path::new(&conf.path()), Arc::new(Miner::default()), false
+		client_config, spec, net_settings, Path::new(&conf.path()), Arc::new(Miner::with_spec(conf.spec())), false
 	).unwrap_or_else(|e| die_with_error("Client", e));
 
 	panic_handler.forward_from(&service);

parity/migration.rs

@@ -20,7 +20,7 @@ use std::io::{Read, Write, Error as IoError, ErrorKind};
 use std::path::PathBuf;
 use std::fmt::{Display, Formatter, Error as FmtError};
 use util::migration::{Manager as MigrationManager, Config as MigrationConfig, MigrationIterator};
-use util::kvdb::{Database, DatabaseConfig};
+use util::kvdb::{Database, DatabaseConfig, CompactionProfile};
 use ethcore::migrations;
 
 /// Database is assumed to be at default version, when no version file is found.
@@ -163,6 +163,7 @@ fn migrate_database(version: u32, path: PathBuf, migrations: MigrationManager) -
 			prefix_size: None,
 			max_open_files: 64,
 			cache_size: None,
+			compaction: CompactionProfile::default(),
 		};
 
 		// open old database

parity/setup_log.rs

@@ -19,10 +19,10 @@ use std::env;
 use std::sync::Arc;
 use time;
 use env_logger::LogBuilder;
-use util::{RotatingLogger};
+use util::RotatingLogger;
 
 /// Sets up the logger
-pub fn setup_log(init: &Option<String>) -> Arc<RotatingLogger> {
+pub fn setup_log(init: &Option<String>, enable_color: bool) -> Arc<RotatingLogger> {
 	use rlog::*;
 
 	let mut levels = String::new();
@@ -43,7 +43,7 @@ pub fn setup_log(init: &Option<String>) -> Arc<RotatingLogger> {
 		builder.parse(s);
 	}
 
-	let logs = Arc::new(RotatingLogger::new(levels));
+	let logs = Arc::new(RotatingLogger::new(levels, enable_color));
 	let logger = logs.clone();
 	let format = move |record: &LogRecord| {
 		let timestamp = time::strftime("%Y-%m-%d %H:%M:%S %Z", &time::now()).unwrap();

rpc/src/v1/impls/eth.rs

@@ -18,6 +18,8 @@
 
 extern crate ethash;
 
+use std::thread;
+use std::time::{Instant, Duration};
 use std::sync::{Arc, Weak, Mutex};
 use std::ops::Deref;
 use ethsync::{SyncProvider, SyncState};
@@ -479,6 +481,12 @@ impl<C, S, M, EM> Eth for EthClient<C, S, M, EM> where
 						trace!(target: "miner", "Syncing. Cannot give any work.");
 						return Err(no_work_err());
 					}
+
+					// Otherwise spin until our submitted block has been included.
+					let timeout = Instant::now() + Duration::from_millis(1000);
+					while Instant::now() < timeout && client.queue_info().total_queue_size() > 0 {
+						thread::sleep(Duration::from_millis(1));
+					}
 				}
 
 				let miner = take_weak!(self.miner);
@@ -490,7 +498,7 @@ impl<C, S, M, EM> Eth for EthClient<C, S, M, EM> where
 					let pow_hash = b.hash();
 					let target = Ethash::difficulty_to_boundary(b.block().header().difficulty());
 					let seed_hash = &self.seed_compute.lock().unwrap().get_seedhash(b.block().header().number());
-					to_value(&(pow_hash, H256::from_slice(&seed_hash[..]), target))
+					to_value(&(pow_hash, H256::from_slice(&seed_hash[..]), target, &U256::from(b.block().header().number())))
 				}).unwrap_or(Err(Error::internal_error()))	// no work found.
 			},
 			_ => Err(Error::invalid_params())

rpc/src/v1/impls/eth_signing.rs

@@ -29,6 +29,9 @@ use v1::impls::{default_gas_price, sign_and_dispatch};
 
 fn fill_optional_fields<C, M>(request: &mut TransactionRequest, client: &C, miner: &M)
 	where C: MiningBlockChainClient, M: MinerService {
+	if request.value.is_none() {
+		request.value = Some(U256::zero());
+	}
 	if request.gas.is_none() {
 		request.gas = Some(miner.sensible_gas_limit());
 	}

rpc/src/v1/impls/ethcore_set.rs

@@ -22,7 +22,7 @@ use jsonrpc_core::*;
 use ethcore::miner::MinerService;
 use ethcore::service::SyncMessage;
 use v1::traits::EthcoreSet;
-use v1::types::{Bytes};
+use v1::types::Bytes;
 
 /// Ethcore-specific rpc interface for operations altering the settings.
 pub struct EthcoreSetClient<M> where
@@ -86,6 +86,13 @@ impl<M> EthcoreSet for EthcoreSetClient<M> where M: MinerService + 'static {
 		})
 	}
 
+	fn set_tx_gas_limit(&self, params: Params) -> Result<Value, Error> {
+		from_params::<(U256,)>(params).and_then(|(limit,)| {
+			take_weak!(self.miner).set_tx_gas_limit(limit.into());
+			to_value(&true)
+		})
+	}
+
 	fn add_reserved_peer(&self, params: Params) -> Result<Value, Error> {
 		from_params::<(String,)>(params).and_then(|(peer,)| {
 			match take_weak!(self.net).add_reserved_peer(&peer) {

rpc/src/v1/impls/mod.rs

@@ -165,7 +165,7 @@ fn transaction_error(error: EthcoreError) -> Error {
 				"There is too many transactions in the queue. Your transaction was dropped due to limit. Try increasing the fee.".into()
 			},
 			InsufficientGasPrice { minimal, got } => {
-				format!("Transaction fee is to low. It does not satisfy your node's minimal fee (minimal: {}, got: {}). Try increasing the fee.", minimal, got)
+				format!("Transaction fee is too low. It does not satisfy your node's minimal fee (minimal: {}, got: {}). Try increasing the fee.", minimal, got)
 			},
 			InsufficientBalance { balance, cost } => {
 				format!("Insufficient funds. Account you try to send transaction from does not have enough funds. Required {} and got: {}.", cost, balance)

rpc/src/v1/tests/eth.rs

@@ -17,6 +17,7 @@
 //! rpc integration tests.
 use std::sync::Arc;
 use std::str::FromStr;
+use std::time::Duration;
 
 use ethcore::client::{BlockChainClient, Client, ClientConfig};
 use ethcore::ids::BlockID;
@@ -24,12 +25,12 @@ use ethcore::spec::{Genesis, Spec};
 use ethcore::block::Block;
 use ethcore::views::BlockView;
 use ethcore::ethereum;
-use ethcore::miner::{MinerService, ExternalMiner, Miner};
+use ethcore::miner::{MinerOptions, MinerService, ExternalMiner, Miner, PendingSet};
 use ethcore::account_provider::AccountProvider;
 use devtools::RandomTempPath;
 use util::Hashable;
 use util::io::IoChannel;
-use util::{U256, H256};
+use util::{U256, H256, Uint};
 use jsonrpc_core::IoHandler;
 use ethjson::blockchain::BlockChain;
 
@@ -49,7 +50,22 @@ fn sync_provider() -> Arc<TestSyncProvider> {
 }
 
 fn miner_service(spec: Spec, accounts: Arc<AccountProvider>) -> Arc<Miner> {
-	Miner::with_accounts(true, spec, accounts)
+	Miner::new(
+		MinerOptions {
+			new_work_notify: vec![],
+			force_sealing: true,
+			reseal_on_external_tx: true,
+			reseal_on_own_tx: true,
+			tx_queue_size: 1024,
+			tx_gas_limit: !U256::zero(),
+			pending_set: PendingSet::SealingOrElseQueue,
+			reseal_min_period: Duration::from_secs(0),
+			work_queue_size: 50,
+			enable_resubmission: true,
+		},
+		spec,
+		Some(accounts)
+	)
 }
 
 fn make_spec(chain: &BlockChain) -> Spec {

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

@@ -43,6 +43,7 @@ pub struct TestMinerService {
 	author: RwLock<Address>,
 	extra_data: RwLock<Bytes>,
 	limit: RwLock<usize>,
+	tx_gas_limit: RwLock<U256>,
 }
 
 impl Default for TestMinerService {
@@ -58,6 +59,7 @@ impl Default for TestMinerService {
 			author: RwLock::new(Address::zero()),
 			extra_data: RwLock::new(vec![1, 2, 3, 4]),
 			limit: RwLock::new(1024),
+			tx_gas_limit: RwLock::new(!U256::zero()),
 		}
 	}
 }
@@ -99,6 +101,10 @@ impl MinerService for TestMinerService {
 		*self.limit.write().unwrap() = limit;
 	}
 
+	fn set_tx_gas_limit(&self, limit: U256) {
+		*self.tx_gas_limit.write().unwrap() = limit;
+	}
+
 	fn transactions_limit(&self) -> usize {
 		*self.limit.read().unwrap()
 	}

rpc/src/v1/tests/mocked/ethcore.rs

@@ -32,7 +32,7 @@ fn client_service() -> Arc<TestBlockChainClient> {
 }
 
 fn logger() -> Arc<RotatingLogger> {
-	Arc::new(RotatingLogger::new("rpc=trace".to_owned()))
+	Arc::new(RotatingLogger::new("rpc=trace".to_owned(), false))
 }
 
 fn settings() -> Arc<NetworkSettings> {

rpc/src/v1/traits/ethcore_set.rs

@@ -40,6 +40,9 @@ pub trait EthcoreSet: Sized + Send + Sync + 'static {
 	/// Sets the limits for transaction queue.
 	fn set_transactions_limit(&self, _: Params) -> Result<Value, Error>;
 
+	/// Sets the maximum amount of gas a single transaction may consume.
+	fn set_tx_gas_limit(&self, _: Params) -> Result<Value, Error>;
+
 	/// Add a reserved peer.
 	fn add_reserved_peer(&self, _: Params) -> Result<Value, Error>;
 
@@ -60,6 +63,7 @@ pub trait EthcoreSet: Sized + Send + Sync + 'static {
 		delegate.add_method("ethcore_setGasCeilTarget", EthcoreSet::set_gas_ceil_target);
 		delegate.add_method("ethcore_setExtraData", EthcoreSet::set_extra_data);
 		delegate.add_method("ethcore_setAuthor", EthcoreSet::set_author);
+		delegate.add_method("ethcore_setMaxTransactionGas", EthcoreSet::set_tx_gas_limit);
 		delegate.add_method("ethcore_setTransactionsLimit", EthcoreSet::set_transactions_limit);
 		delegate.add_method("ethcore_addReservedPeer", EthcoreSet::add_reserved_peer);
 		delegate.add_method("ethcore_removeReservedPeer", EthcoreSet::remove_reserved_peer);

rpc/src/v1/types/optionals.rs

@@ -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/>.
 
-use serde::{Serialize, Serializer};
+use serde::{Serialize, Serializer, Deserialize, Deserializer};
 use serde_json::Value;
 
 /// Optional value
@@ -26,13 +26,22 @@ pub enum OptionalValue<T> where T: Serialize {
 	Null
 }
 
-impl<T> Default for OptionalValue<T> where T: Serialize {
+impl<T> Default for OptionalValue<T> where T: Serialize + Deserialize {
 	fn default() -> Self {
 		OptionalValue::Null
 	}
 }
 
-impl<T> Serialize for OptionalValue<T> where T: Serialize {
+impl<T> Into<Option<T>> for OptionalValue<T> where T: Serialize + Deserialize {
+	fn into(self) -> Option<T> {
+		match self {
+			OptionalValue::Null => None,
+			OptionalValue::Value(t) => Some(t),
+		}
+	}
+}
+
+impl<T> Serialize for OptionalValue<T> where T: Serialize + Deserialize {
 	fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
 	where S: Serializer {
 		match *self {
@@ -42,6 +51,17 @@ impl<T> Serialize for OptionalValue<T> where T: Serialize {
 	}
 }
 
+impl<T> Deserialize for OptionalValue<T> where T: Serialize + Deserialize {
+	fn deserialize<D>(deserializer: &mut D) -> Result<OptionalValue<T>, D::Error>
+	where D: Deserializer {
+		let deser_result: Result<T, D::Error> = Deserialize::deserialize(deserializer);
+		match deser_result {
+			Ok(t) => Ok(OptionalValue::Value(t)),
+			Err(_) => Ok(OptionalValue::Null),
+		}
+	}
+}
+
 #[cfg(test)]
 mod tests {
 	use serde_json;

signer/Cargo.toml

@@ -15,10 +15,10 @@ rand = "0.3.14"
 jsonrpc-core = "2.0"
 log = "0.3"
 env_logger = "0.3"
-ws = { git = "https://github.com/ethcore/ws-rs.git" }
+ws = { git = "https://github.com/ethcore/ws-rs.git", branch = "stable" }
 ethcore-util = { path = "../util" }
 ethcore-rpc = { path = "../rpc" }
-parity-minimal-sysui = { git = "https://github.com/ethcore/parity-dapps-minimal-sysui-rs.git" }
+parity-minimal-sysui = { git = "https://github.com/ethcore/parity-dapps-minimal-sysui-rs.git", version = "0.2.0" }
 
 clippy = { version = "0.0.77", optional = true}
 

signer/src/authcode_store.rs

@@ -120,7 +120,7 @@ impl<T: TimeProvider> AuthCodes<T> {
 			.filter_map(|f| String::from_utf8(f.to_vec()).ok())
 			.collect::<Vec<String>>()
 			.join("-");
-		info!(target: "signer", "New authentication token generated.");
+		trace!(target: "signer", "New authentication token generated.");
 		self.codes.push(code);
 		Ok(readable_code)
 	}

signer/src/ws_server/mod.rs

@@ -110,7 +110,17 @@ impl Server {
 		// Spawn a thread with event loop
 		let handle = thread::spawn(move || {
 			ph.catch_panic(move || {
-				ws.listen(addr).unwrap()
+				match ws.listen(addr).map_err(ServerError::from) {
+					Err(ServerError::IoError(io)) => die(format!(
+						"Signer: Could not start listening on specified address. Make sure that no other instance is running on Signer's port. Details: {:?}",
+						io
+					)),
+					Err(any_error) => die(format!(
+						"Signer: Unknown error occured when starting Signer. Details: {:?}",
+						any_error
+					)),
+					Ok(server) => server,
+				}
 			}).unwrap()
 		});
 
@@ -123,7 +133,11 @@ impl Server {
 					// TODO [ToDr] Some better structure here for messages.
 					broadcaster.send("new_message").unwrap();
 				}).expect("It's the only place we are running start_listening. It shouldn't fail.");
-				broadcaster.shutdown().expect("Broadcaster should close gently.")
+				let res = broadcaster.shutdown();
+
+				if let Err(e) = res {
+					warn!("Signer: Broadcaster was not closed cleanly. Details: {:?}", e);
+				}
 			}).unwrap()
 		});
 
@@ -148,5 +162,11 @@ impl Drop for Server {
 		self.queue.finish();
 		self.broadcaster_handle.take().unwrap().join().unwrap();
 		self.handle.take().unwrap().join().unwrap();
+
 	}
 }
+
+fn die(msg: String) -> ! {
+	println!("ERROR: {}", msg);
+	std::process::exit(1);
+}

signer/src/ws_server/session.rs

@@ -62,6 +62,19 @@ fn auth_is_valid(codes: &Path, protocols: ws::Result<Vec<&str>>) -> bool {
 	}
 }
 
+fn add_headers(mut response: ws::Response, mime: &str) -> ws::Response {
+	let content_len = format!("{}", response.len());
+	{
+		let mut headers = response.headers_mut();
+		headers.push(("X-Frame-Options".into(), b"SAMEORIGIN".to_vec()));
+		headers.push(("Server".into(), b"Parity/SignerUI".to_vec()));
+		headers.push(("Content-Length".into(), content_len.as_bytes().to_vec()));
+		headers.push(("Content-Type".into(), mime.as_bytes().to_vec()));
+		headers.push(("Connection".into(), b"close".to_vec()));
+	}
+	response
+}
+
 pub struct Session {
 	out: ws::Sender,
 	self_origin: String,
@@ -98,26 +111,13 @@ impl ws::Handler for Session {
 		}
 
 		// Otherwise try to serve a page.
-		sysui::handle(req.resource())
+		Ok(sysui::handle(req.resource())
 			.map_or_else(
-				// return error
+				// return 404 not found
-				|| Ok(ws::Response::not_found("Page not found".into())),
+				|| add_headers(ws::Response::not_found("Not found".into()), "text/plain"),
 				// or serve the file
-				|f| {
+				|f| add_headers(ws::Response::ok(f.content.into()), &f.mime)
-					let content_len = format!("{}", f.content.as_bytes().len());
+			))
-					let mut res = ws::Response::ok(f.content.into());
-					{
-						let mut headers = res.headers_mut();
-						headers.push(("Server".into(), b"Parity/SignerUI".to_vec()));
-						headers.push(("Connection".into(), b"Closed".to_vec()));
-						headers.push(("Content-Length".into(), content_len.as_bytes().to_vec()));
-						headers.push(("Content-Type".into(), f.mime.as_bytes().to_vec()));
-						if !f.safe_to_embed {
-							headers.push(("X-Frame-Options".into(), b"SAMEORIGIN".to_vec()));
-						}
-					}
-					Ok(res)
-				})
 	}
 
 	fn on_message(&mut self, msg: ws::Message) -> ws::Result<()> {

sync/src/chain.rs

@@ -1231,6 +1231,14 @@ impl ChainSync {
 		rlp_stream.out()
 	}
 
+	/// creates latest block rlp for the given client
+	fn create_new_block_rlp(chain: &BlockChainClient, hash: &H256) -> Bytes {
+		let mut rlp_stream = RlpStream::new_list(2);
+		rlp_stream.append_raw(&chain.block(BlockID::Hash(hash.clone())).expect("Block has just been sealed; qed"), 1);
+		rlp_stream.append(&chain.block_total_difficulty(BlockID::Hash(hash.clone())).expect("Block has just been sealed; qed."));
+		rlp_stream.out()
+	}
+
 	/// returns peer ids that have less blocks than our chain
 	fn get_lagging_peers(&mut self, chain_info: &BlockChainInfo, io: &SyncIo) -> Vec<(PeerId, BlockNumber)> {
 		let latest_hash = chain_info.best_block_hash;
@@ -1250,7 +1258,6 @@ impl ChainSync {
 			.collect::<Vec<_>>()
 	}
 
-
 	fn select_lagging_peers(&mut self, chain_info: &BlockChainInfo, io: &mut SyncIo) -> Vec<(PeerId, BlockNumber)> {
 		use rand::Rng;
 		let mut lagging_peers = self.get_lagging_peers(chain_info, io);
@@ -1263,13 +1270,24 @@ impl ChainSync {
 	}
 
 	/// propagates latest block to lagging peers
-	fn propagate_blocks(&mut self, chain_info: &BlockChainInfo, io: &mut SyncIo) -> usize {
+	fn propagate_blocks(&mut self, chain_info: &BlockChainInfo, io: &mut SyncIo, sealed: &[H256]) -> usize {
-		let lucky_peers = self.select_lagging_peers(chain_info, io);
+		let lucky_peers: Vec<_> = if sealed.is_empty() {
+			self.select_lagging_peers(chain_info, io).iter().map(|&(id, _)| id).collect()
+		} else {
+			self.peers.keys().cloned().collect()
+		};
 		trace!(target: "sync", "Sending NewBlocks to {:?}", lucky_peers);
 		let mut sent = 0;
-		for (peer_id, _) in lucky_peers {
+		for peer_id in lucky_peers {
+			if sealed.is_empty() {
 				let rlp =  ChainSync::create_latest_block_rlp(io.chain());
 				self.send_packet(io, peer_id, NEW_BLOCK_PACKET, rlp);
+			} else {
+				for h in sealed {
+					let rlp =  ChainSync::create_new_block_rlp(io.chain(), h);
+					self.send_packet(io, peer_id, NEW_BLOCK_PACKET, rlp);
+				}
+			}
 			self.peers.get_mut(&peer_id).unwrap().latest_hash = chain_info.best_block_hash.clone();
 			self.peers.get_mut(&peer_id).unwrap().latest_number = Some(chain_info.best_block_number);
 			sent += 1;
@@ -1314,7 +1332,7 @@ impl ChainSync {
 			return 0;
 		}
 
-		let mut transactions = io.chain().all_transactions();
+		let mut transactions = io.chain().pending_transactions();
 		if transactions.is_empty() {
 			return 0;
 		}
@@ -1346,11 +1364,11 @@ impl ChainSync {
 		sent
 	}
 
-	fn propagate_latest_blocks(&mut self, io: &mut SyncIo) {
+	fn propagate_latest_blocks(&mut self, io: &mut SyncIo, sealed: &[H256]) {
 		let chain_info = io.chain().chain_info();
 		if (((chain_info.best_block_number as i64) - (self.last_sent_block_number as i64)).abs() as BlockNumber) < MAX_PEER_LAG_PROPAGATION {
 			let hashes = self.propagate_new_hashes(&chain_info, io);
-			let blocks = self.propagate_blocks(&chain_info, io);
+			let blocks = self.propagate_blocks(&chain_info, io, sealed);
 			if blocks != 0 || hashes != 0 {
 				trace!(target: "sync", "Sent latest {} blocks and {} hashes to peers.", blocks, hashes);
 			}
@@ -1365,10 +1383,10 @@ impl ChainSync {
 	}
 
 	/// called when block is imported to chain, updates transactions queue and propagates the blocks
-	pub fn chain_new_blocks(&mut self, io: &mut SyncIo, _imported: &[H256], invalid: &[H256], _enacted: &[H256], _retracted: &[H256]) {
+	pub fn chain_new_blocks(&mut self, io: &mut SyncIo, _imported: &[H256], invalid: &[H256], _enacted: &[H256], _retracted: &[H256], sealed: &[H256]) {
 		if io.is_chain_queue_empty() {
 			// Propagate latests blocks
-			self.propagate_latest_blocks(io);
+			self.propagate_latest_blocks(io, sealed);
 		}
 		if !invalid.is_empty() {
 			trace!(target: "sync", "Bad blocks in the queue, restarting");
@@ -1637,7 +1655,26 @@ mod tests {
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
 		let chain_info = client.chain_info();
 		let mut io = TestIo::new(&mut client, &mut queue, None);
-		let peer_count = sync.propagate_blocks(&chain_info, &mut io);
+		let peer_count = sync.propagate_blocks(&chain_info, &mut io, &[]);
+
+		// 1 message should be send
+		assert_eq!(1, io.queue.len());
+		// 1 peer should be updated
+		assert_eq!(1, peer_count);
+		// NEW_BLOCK_PACKET
+		assert_eq!(0x07, io.queue[0].packet_id);
+	}
+
+	#[test]
+	fn sends_sealed_block() {
+		let mut client = TestBlockChainClient::new();
+		client.add_blocks(100, EachBlockWith::Uncle);
+		let mut queue = VecDeque::new();
+		let hash = client.block_hash(BlockID::Number(99)).unwrap();
+		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
+		let chain_info = client.chain_info();
+		let mut io = TestIo::new(&mut client, &mut queue, None);
+		let peer_count = sync.propagate_blocks(&chain_info, &mut io, &[hash.clone()]);
 
 		// 1 message should be send
 		assert_eq!(1, io.queue.len());
@@ -1761,7 +1798,7 @@ mod tests {
 		let chain_info = client.chain_info();
 		let mut io = TestIo::new(&mut client, &mut queue, None);
 
-		sync.propagate_blocks(&chain_info, &mut io);
+		sync.propagate_blocks(&chain_info, &mut io, &[]);
 
 		let data = &io.queue[0].data.clone();
 		let result = sync.on_peer_new_block(&mut io, 0, &UntrustedRlp::new(data));
@@ -1794,7 +1831,7 @@ mod tests {
 			let mut queue = VecDeque::new();
 			let mut io = TestIo::new(&mut client, &mut queue, None);
 			io.chain.miner.chain_new_blocks(io.chain, &[], &[], &[], &good_blocks);
-			sync.chain_new_blocks(&mut io, &[], &[], &[], &good_blocks);
+			sync.chain_new_blocks(&mut io, &[], &[], &[], &good_blocks, &[]);
 			assert_eq!(io.chain.miner.status().transactions_in_future_queue, 0);
 			assert_eq!(io.chain.miner.status().transactions_in_pending_queue, 1);
 		}
@@ -1808,7 +1845,7 @@ mod tests {
 			let mut queue = VecDeque::new();
 			let mut io = TestIo::new(&mut client, &mut queue, None);
 			io.chain.miner.chain_new_blocks(io.chain, &[], &[], &good_blocks, &retracted_blocks);
-			sync.chain_new_blocks(&mut io, &[], &[], &good_blocks, &retracted_blocks);
+			sync.chain_new_blocks(&mut io, &[], &[], &good_blocks, &retracted_blocks, &[]);
 		}
 
 		// then
@@ -1833,10 +1870,10 @@ mod tests {
 		let mut io = TestIo::new(&mut client, &mut queue, None);
 
 		// when
-		sync.chain_new_blocks(&mut io, &[], &[], &[], &good_blocks);
+		sync.chain_new_blocks(&mut io, &[], &[], &[], &good_blocks, &[]);
 		assert_eq!(io.chain.miner.status().transactions_in_future_queue, 0);
 		assert_eq!(io.chain.miner.status().transactions_in_pending_queue, 0);
-		sync.chain_new_blocks(&mut io, &[], &[], &good_blocks, &retracted_blocks);
+		sync.chain_new_blocks(&mut io, &[], &[], &good_blocks, &retracted_blocks, &[]);
 
 		// then
 		let status = io.chain.miner.status();

sync/src/lib.rs

@@ -44,8 +44,14 @@
 //! 	let mut service = NetworkService::new(NetworkConfiguration::new()).unwrap();
 //! 	service.start().unwrap();
 //! 	let dir = env::temp_dir();
-//! 	let client = Client::new(ClientConfig::default(), ethereum::new_frontier(true), &dir, Arc::new(Miner::default()), service.io().channel()).unwrap();
+//! 	let miner = Miner::new(Default::default(), ethereum::new_frontier(true), None);
-//! 	let miner = Miner::new(false, ethereum::new_frontier(true));
+//! 	let client = Client::new(
+//!			ClientConfig::default(),
+//!			ethereum::new_frontier(true),
+//!			&dir,
+//!			miner,
+//!			service.io().channel()
+//!		).unwrap();
 //! 	let sync = EthSync::new(SyncConfig::default(), client);
 //! 	EthSync::register(&mut service, sync);
 //! }
@@ -154,11 +160,13 @@ impl SyncProvider for EthSync {
 	}
 
 	fn start_network(&self) {
-		self.io_channel.read().unwrap().send(NetworkIoMessage::User(SyncMessage::StartNetwork)).expect("Error sending IO notification");
+		self.io_channel.read().unwrap().send(NetworkIoMessage::User(SyncMessage::StartNetwork))
+			.unwrap_or_else(|e| warn!("Error sending IO notification: {:?}", e));
 	}
 
 	fn stop_network(&self) {
-		self.io_channel.read().unwrap().send(NetworkIoMessage::User(SyncMessage::StopNetwork)).expect("Error sending IO notification");
+		self.io_channel.read().unwrap().send(NetworkIoMessage::User(SyncMessage::StopNetwork))
+			.unwrap_or_else(|e| warn!("Error sending IO notification: {:?}", e));
 	}
 }
 
@@ -188,9 +196,9 @@ impl NetworkProtocolHandler<SyncMessage> for EthSync {
 	#[cfg_attr(feature="dev", allow(single_match))]
 	fn message(&self, io: &NetworkContext<SyncMessage>, message: &SyncMessage) {
 		match *message {
-			SyncMessage::NewChainBlocks { ref imported, ref invalid, ref enacted, ref retracted } => {
+			SyncMessage::NewChainBlocks { ref imported, ref invalid, ref enacted, ref retracted, ref sealed } => {
 				let mut sync_io = NetSyncIo::new(io, self.chain.deref());
-				self.sync.write().unwrap().chain_new_blocks(&mut sync_io, imported, invalid, enacted, retracted);
+				self.sync.write().unwrap().chain_new_blocks(&mut sync_io, imported, invalid, enacted, retracted, sealed);
 			},
 			_ => {/* Ignore other messages */},
 		}

sync/src/tests/helpers.rs

@@ -173,6 +173,6 @@ impl TestNet {
 
 	pub fn trigger_chain_new_blocks(&mut self, peer_id: usize) {
 		let mut peer = self.peer_mut(peer_id);
-		peer.sync.write().unwrap().chain_new_blocks(&mut TestIo::new(&mut peer.chain, &mut peer.queue, None), &[], &[], &[], &[]);
+		peer.sync.write().unwrap().chain_new_blocks(&mut TestIo::new(&mut peer.chain, &mut peer.queue, None), &[], &[], &[], &[], &[]);
 	}
 }

util/Cargo.toml

@@ -37,6 +37,7 @@ vergen = "0.1"
 target_info = "0.1"
 bigint = { path = "bigint" }
 chrono = "0.2"
+ansi_term = "0.7"
 
 [features]
 default = []

util/bigint/src/uint.rs

@@ -557,7 +557,7 @@ macro_rules! construct_uint {
 	($name:ident, $n_words:expr) => (
 		/// Little-endian large integer type
 		#[repr(C)]
-		#[derive(Copy, Clone, Eq, PartialEq)]
+		#[derive(Copy, Clone, Eq, PartialEq, Hash)]
 		pub struct $name(pub [u64; $n_words]);
 
 		impl Uint for $name {
@@ -1126,14 +1126,6 @@ macro_rules! construct_uint {
 				Ok(())
 			}
 		}
-
-		#[cfg_attr(feature="dev", allow(derive_hash_xor_eq))] // We are pretty sure it's ok.
-		impl Hash for $name {
-			fn hash<H>(&self, state: &mut H) where H: Hasher {
-				unsafe { state.write(::std::slice::from_raw_parts(self.0.as_ptr() as *mut u8, self.0.len() * 8)); }
-				state.finish();
-			}
-		}
 	);
 }
 

util/src/hash.rs

@@ -132,15 +132,10 @@ macro_rules! impl_hash {
 				$size
 			}
 
-			// TODO: remove once slice::clone_from_slice is stable
 			#[inline]
 			fn clone_from_slice(&mut self, src: &[u8]) -> usize {
-				let min = ::std::cmp::min($size, src.len());
+				let min = cmp::min($size, src.len());
-				let dst = &mut self.deref_mut()[.. min];
+				self.0[..min].copy_from_slice(&src[..min]);
-				let src = &src[.. min];
-				for i in 0..min {
-					dst[i] = src[i];
-				}
 				min
 			}
 
@@ -151,7 +146,7 @@ macro_rules! impl_hash {
 			}
 
 			fn copy_to(&self, dest: &mut[u8]) {
-				let min = ::std::cmp::min($size, dest.len());
+				let min = cmp::min($size, dest.len());
 				dest[..min].copy_from_slice(&self.0[..min]);
 			}
 

util/src/io/service.rs

@@ -135,8 +135,9 @@ impl<Message> IoContext<Message> where Message: Send + Clone + 'static {
 	}
 
 	/// Broadcast a message to other IO clients
-	pub fn message(&self, message: Message) {
+	pub fn message(&self, message: Message) -> Result<(), UtilError> {
-		self.channel.send(message).expect("Error seding message");
+		try!(self.channel.send(message));
+		Ok(())
 	}
 
 	/// Get message channel
@@ -351,7 +352,9 @@ impl<Message> IoService<Message> where Message: Send + Sync + Clone + 'static {
 	/// Starts IO event loop
 	pub fn start() -> Result<IoService<Message>, UtilError> {
 		let panic_handler = PanicHandler::new_in_arc();
-    	let mut event_loop = EventLoop::new().unwrap();
+		let mut config = EventLoopConfig::new();
+		config.messages_per_tick(1024);
+    	let mut event_loop = EventLoop::configured(config).expect("Error creating event loop");
         let channel = event_loop.channel();
 		let panic = panic_handler.clone();
 		let thread = thread::spawn(move || {
@@ -390,7 +393,7 @@ impl<Message> IoService<Message> where Message: Send + Sync + Clone + 'static {
 impl<Message> Drop for IoService<Message> where Message: Send + Sync + Clone {
 	fn drop(&mut self) {
 		trace!(target: "shutdown", "[IoService] Closing...");
-		self.host_channel.send(IoMessage::Shutdown).unwrap();
+		self.host_channel.send(IoMessage::Shutdown).unwrap_or_else(|e| warn!("Error on IO service shutdown: {:?}", e));
 		self.thread.take().unwrap().join().ok();
 		trace!(target: "shutdown", "[IoService] Closed.");
 	}

util/src/journaldb/archivedb.rs

@@ -48,13 +48,8 @@ pub struct ArchiveDB {
 
 impl ArchiveDB {
 	/// Create a new instance from file
-	pub fn new(path: &str, cache_size: Option<usize>) -> ArchiveDB {
+	pub fn new(path: &str, config: DatabaseConfig) -> ArchiveDB {
-		let opts = DatabaseConfig {
+		let opts = config.prefix(DB_PREFIX_LEN);
-			// this must match account_db prefix
-			prefix_size: Some(DB_PREFIX_LEN),
-			max_open_files: 256,
-			cache_size: cache_size,
-		};
 		let backing = Database::open(&opts, path).unwrap_or_else(|e| {
 			panic!("Error opening state db: {}", e);
 		});
@@ -80,7 +75,7 @@ impl ArchiveDB {
 	fn new_temp() -> ArchiveDB {
 		let mut dir = env::temp_dir();
 		dir.push(H32::random().hex());
-		Self::new(dir.to_str().unwrap(), None)
+		Self::new(dir.to_str().unwrap(), DatabaseConfig::default())
 	}
 
 	fn payload(&self, key: &H256) -> Option<Bytes> {
@@ -222,6 +217,7 @@ mod tests {
 	use super::*;
 	use hashdb::*;
 	use journaldb::traits::JournalDB;
+	use kvdb::DatabaseConfig;
 
 	#[test]
 	fn insert_same_in_fork() {
@@ -363,7 +359,7 @@ mod tests {
 		let bar = H256::random();
 
 		let foo = {
-			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			// history is 1
 			let foo = jdb.insert(b"foo");
 			jdb.emplace(bar.clone(), b"bar".to_vec());
@@ -372,13 +368,13 @@ mod tests {
 		};
 
 		{
-			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			jdb.remove(&foo);
 			jdb.commit(1, &b"1".sha3(), Some((0, b"0".sha3()))).unwrap();
 		}
 
 		{
-			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			assert!(jdb.contains(&foo));
 			assert!(jdb.contains(&bar));
 			jdb.commit(2, &b"2".sha3(), Some((1, b"1".sha3()))).unwrap();
@@ -391,7 +387,7 @@ mod tests {
 		dir.push(H32::random().hex());
 
 		let foo = {
-			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			// history is 1
 			let foo = jdb.insert(b"foo");
 			jdb.commit(0, &b"0".sha3(), None).unwrap();
@@ -405,7 +401,7 @@ mod tests {
 		};
 
 		{
-			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			jdb.remove(&foo);
 			jdb.commit(3, &b"3".sha3(), Some((2, b"2".sha3()))).unwrap();
 			assert!(jdb.contains(&foo));
@@ -420,7 +416,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 		let (foo, _, _) = {
-			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			// history is 1
 			let foo = jdb.insert(b"foo");
 			let bar = jdb.insert(b"bar");
@@ -435,7 +431,7 @@ mod tests {
 		};
 
 		{
-			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = ArchiveDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			jdb.commit(2, &b"2b".sha3(), Some((1, b"1b".sha3()))).unwrap();
 			assert!(jdb.contains(&foo));
 		}
@@ -446,14 +442,14 @@ mod tests {
 		let temp = ::devtools::RandomTempPath::new();
 
 		let key = {
-			let mut jdb = ArchiveDB::new(temp.as_str(), None);
+			let mut jdb = ArchiveDB::new(temp.as_str(), DatabaseConfig::default());
 			let key = jdb.insert(b"foo");
 			jdb.commit(0, &b"0".sha3(), None).unwrap();
 			key
 		};
 
 		{
-			let jdb = ArchiveDB::new(temp.as_str(), None);
+			let jdb = ArchiveDB::new(temp.as_str(), DatabaseConfig::default());
 			let state = jdb.state(&key);
 			assert!(state.is_some());
 		}

util/src/journaldb/earlymergedb.rs

@@ -73,13 +73,8 @@ const PADDING : [u8; 10] = [ 0u8; 10 ];
 
 impl EarlyMergeDB {
 	/// Create a new instance from file
-	pub fn new(path: &str, cache_size: Option<usize>) -> EarlyMergeDB {
+	pub fn new(path: &str, config: DatabaseConfig) -> EarlyMergeDB {
-		let opts = DatabaseConfig {
+		let opts = config.prefix(DB_PREFIX_LEN);
-			// this must match account_db prefix
-			prefix_size: Some(DB_PREFIX_LEN),
-			max_open_files: 256,
-			cache_size: cache_size,
-		};
 		let backing = Database::open(&opts, path).unwrap_or_else(|e| {
 			panic!("Error opening state db: {}", e);
 		});
@@ -107,7 +102,7 @@ impl EarlyMergeDB {
 	fn new_temp() -> EarlyMergeDB {
 		let mut dir = env::temp_dir();
 		dir.push(H32::random().hex());
-		Self::new(dir.to_str().unwrap(), None)
+		Self::new(dir.to_str().unwrap(), DatabaseConfig::default())
 	}
 
 	fn morph_key(key: &H256, index: u8) -> Bytes {
@@ -537,6 +532,7 @@ mod tests {
 	use super::super::traits::JournalDB;
 	use hashdb::*;
 	use log::init_log;
+	use kvdb::DatabaseConfig;
 
 	#[test]
 	fn insert_same_in_fork() {
@@ -714,7 +710,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 		jdb.commit(0, &b"0".sha3(), None).unwrap();
 		assert!(jdb.can_reconstruct_refs());
 
@@ -742,7 +738,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 		jdb.commit(0, &b"0".sha3(), None).unwrap();
 		assert!(jdb.can_reconstruct_refs());
 
@@ -770,7 +766,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 		jdb.commit(0, &b"0".sha3(), None).unwrap();
 		assert!(jdb.can_reconstruct_refs());
 
@@ -808,7 +804,7 @@ mod tests {
 		let bar = H256::random();
 
 		let foo = {
-			let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			// history is 1
 			let foo = jdb.insert(b"foo");
 			jdb.emplace(bar.clone(), b"bar".to_vec());
@@ -818,14 +814,14 @@ mod tests {
 		};
 
 		{
-			let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			jdb.remove(&foo);
 			jdb.commit(1, &b"1".sha3(), Some((0, b"0".sha3()))).unwrap();
 			assert!(jdb.can_reconstruct_refs());
 		}
 
 		{
-			let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			assert!(jdb.contains(&foo));
 			assert!(jdb.contains(&bar));
 			jdb.commit(2, &b"2".sha3(), Some((1, b"1".sha3()))).unwrap();
@@ -840,7 +836,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 
 		// history is 4
 		let foo = jdb.insert(b"foo");
@@ -869,7 +865,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 
 		// history is 4
 		let foo = jdb.insert(b"foo");
@@ -918,7 +914,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 		// history is 1
 		let foo = jdb.insert(b"foo");
 		jdb.commit(1, &b"1".sha3(), Some((0, b"0".sha3()))).unwrap();
@@ -949,7 +945,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 		// history is 4
 		let foo = jdb.insert(b"foo");
 		jdb.commit(0, &b"0".sha3(), None).unwrap();
@@ -989,7 +985,7 @@ mod tests {
 		let foo = b"foo".sha3();
 
 		{
-			let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			// history is 1
 			jdb.insert(b"foo");
 			jdb.commit(0, &b"0".sha3(), None).unwrap();
@@ -1010,7 +1006,7 @@ mod tests {
 			assert!(jdb.contains(&foo));
 
 		// incantation to reopen the db
-		}; { let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+		}; { let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 
 			jdb.remove(&foo);
 			jdb.commit(4, &b"4".sha3(), Some((2, b"2".sha3()))).unwrap();
@@ -1018,14 +1014,14 @@ mod tests {
 			assert!(jdb.contains(&foo));
 
 		// incantation to reopen the db
-		}; { let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+		}; { let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 
 			jdb.commit(5, &b"5".sha3(), Some((3, b"3".sha3()))).unwrap();
 			assert!(jdb.can_reconstruct_refs());
 			assert!(jdb.contains(&foo));
 
 		// incantation to reopen the db
-		}; { let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+		}; { let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 
 			jdb.commit(6, &b"6".sha3(), Some((4, b"4".sha3()))).unwrap();
 			assert!(jdb.can_reconstruct_refs());
@@ -1038,7 +1034,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 		let (foo, bar, baz) = {
-			let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			// history is 1
 			let foo = jdb.insert(b"foo");
 			let bar = jdb.insert(b"bar");
@@ -1056,7 +1052,7 @@ mod tests {
 		};
 
 		{
-			let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = EarlyMergeDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			jdb.commit(2, &b"2b".sha3(), Some((1, b"1b".sha3()))).unwrap();
 			assert!(jdb.can_reconstruct_refs());
 			assert!(jdb.contains(&foo));

util/src/journaldb/mod.rs

@@ -17,6 +17,7 @@
 //! `JournalDB` interface and implementation.
 
 use common::*;
+use kvdb::DatabaseConfig;
 
 /// Export the journaldb module.
 pub mod traits;
@@ -71,12 +72,12 @@ impl fmt::Display for Algorithm {
 }
 
 /// Create a new `JournalDB` trait object.
-pub fn new(path: &str, algorithm: Algorithm, cache_size: Option<usize>) -> Box<JournalDB> {
+pub fn new(path: &str, algorithm: Algorithm, config: DatabaseConfig) -> Box<JournalDB> {
 	match algorithm {
-		Algorithm::Archive => Box::new(archivedb::ArchiveDB::new(path, cache_size)),
+		Algorithm::Archive => Box::new(archivedb::ArchiveDB::new(path, config)),
-		Algorithm::EarlyMerge => Box::new(earlymergedb::EarlyMergeDB::new(path, cache_size)),
+		Algorithm::EarlyMerge => Box::new(earlymergedb::EarlyMergeDB::new(path, config)),
-		Algorithm::OverlayRecent => Box::new(overlayrecentdb::OverlayRecentDB::new(path, cache_size)),
+		Algorithm::OverlayRecent => Box::new(overlayrecentdb::OverlayRecentDB::new(path, config)),
-		Algorithm::RefCounted => Box::new(refcounteddb::RefCountedDB::new(path, cache_size)),
+		Algorithm::RefCounted => Box::new(refcounteddb::RefCountedDB::new(path, config)),
 	}
 }
 

util/src/journaldb/overlayrecentdb.rs

@@ -98,18 +98,13 @@ const PADDING : [u8; 10] = [ 0u8; 10 ];
 
 impl OverlayRecentDB {
 	/// Create a new instance from file
-	pub fn new(path: &str, cache_size: Option<usize>) -> OverlayRecentDB {
+	pub fn new(path: &str, config: DatabaseConfig) -> OverlayRecentDB {
-		Self::from_prefs(path, cache_size)
+		Self::from_prefs(path, config)
 	}
 
 	/// Create a new instance from file
-	pub fn from_prefs(path: &str, cache_size: Option<usize>) -> OverlayRecentDB {
+	pub fn from_prefs(path: &str, config: DatabaseConfig) -> OverlayRecentDB {
-		let opts = DatabaseConfig {
+		let opts = config.prefix(DB_PREFIX_LEN);
-			// this must match account_db prefix
-			prefix_size: Some(DB_PREFIX_LEN),
-			max_open_files: 256,
-			cache_size: cache_size,
-		};
 		let backing = Database::open(&opts, path).unwrap_or_else(|e| {
 			panic!("Error opening state db: {}", e);
 		});
@@ -135,7 +130,7 @@ impl OverlayRecentDB {
 	pub fn new_temp() -> OverlayRecentDB {
 		let mut dir = env::temp_dir();
 		dir.push(H32::random().hex());
-		Self::new(dir.to_str().unwrap(), None)
+		Self::new(dir.to_str().unwrap(), DatabaseConfig::default())
 	}
 
 	#[cfg(test)]
@@ -369,6 +364,7 @@ mod tests {
 	use hashdb::*;
 	use log::init_log;
 	use journaldb::JournalDB;
+	use kvdb::DatabaseConfig;
 
 	#[test]
 	fn insert_same_in_fork() {
@@ -526,7 +522,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 		jdb.commit(0, &b"0".sha3(), None).unwrap();
 		assert!(jdb.can_reconstruct_refs());
 
@@ -554,7 +550,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 		jdb.commit(0, &b"0".sha3(), None).unwrap();
 		assert!(jdb.can_reconstruct_refs());
 
@@ -582,7 +578,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 		jdb.commit(0, &b"0".sha3(), None).unwrap();
 		assert!(jdb.can_reconstruct_refs());
 
@@ -620,7 +616,7 @@ mod tests {
 		let bar = H256::random();
 
 		let foo = {
-			let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			// history is 1
 			let foo = jdb.insert(b"foo");
 			jdb.emplace(bar.clone(), b"bar".to_vec());
@@ -630,14 +626,14 @@ mod tests {
 		};
 
 		{
-			let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			jdb.remove(&foo);
 			jdb.commit(1, &b"1".sha3(), Some((0, b"0".sha3()))).unwrap();
 			assert!(jdb.can_reconstruct_refs());
 		}
 
 		{
-			let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			assert!(jdb.contains(&foo));
 			assert!(jdb.contains(&bar));
 			jdb.commit(2, &b"2".sha3(), Some((1, b"1".sha3()))).unwrap();
@@ -652,7 +648,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 
 		// history is 4
 		let foo = jdb.insert(b"foo");
@@ -681,7 +677,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 
 		// history is 4
 		let foo = jdb.insert(b"foo");
@@ -730,7 +726,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 		// history is 1
 		let foo = jdb.insert(b"foo");
 		jdb.commit(1, &b"1".sha3(), Some((0, b"0".sha3()))).unwrap();
@@ -761,7 +757,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 
-		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+		let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 		// history is 4
 		let foo = jdb.insert(b"foo");
 		jdb.commit(0, &b"0".sha3(), None).unwrap();
@@ -801,7 +797,7 @@ mod tests {
 		let foo = b"foo".sha3();
 
 		{
-			let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			// history is 1
 			jdb.insert(b"foo");
 			jdb.commit(0, &b"0".sha3(), None).unwrap();
@@ -822,7 +818,7 @@ mod tests {
 			assert!(jdb.contains(&foo));
 
 		// incantation to reopen the db
-		}; { let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+		}; { let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 
 			jdb.remove(&foo);
 			jdb.commit(4, &b"4".sha3(), Some((2, b"2".sha3()))).unwrap();
@@ -830,14 +826,14 @@ mod tests {
 			assert!(jdb.contains(&foo));
 
 		// incantation to reopen the db
-		}; { let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+		}; { let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 
 			jdb.commit(5, &b"5".sha3(), Some((3, b"3".sha3()))).unwrap();
 			assert!(jdb.can_reconstruct_refs());
 			assert!(jdb.contains(&foo));
 
 		// incantation to reopen the db
-		}; { let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+		}; { let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 
 			jdb.commit(6, &b"6".sha3(), Some((4, b"4".sha3()))).unwrap();
 			assert!(jdb.can_reconstruct_refs());
@@ -850,7 +846,7 @@ mod tests {
 		let mut dir = ::std::env::temp_dir();
 		dir.push(H32::random().hex());
 		let (foo, bar, baz) = {
-			let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			// history is 1
 			let foo = jdb.insert(b"foo");
 			let bar = jdb.insert(b"bar");
@@ -868,7 +864,7 @@ mod tests {
 		};
 
 		{
-			let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), None);
+			let mut jdb = OverlayRecentDB::new(dir.to_str().unwrap(), DatabaseConfig::default());
 			jdb.commit(2, &b"2b".sha3(), Some((1, b"1b".sha3()))).unwrap();
 			assert!(jdb.can_reconstruct_refs());
 			assert!(jdb.contains(&foo));

util/src/journaldb/refcounteddb.rs

@@ -46,13 +46,8 @@ const PADDING : [u8; 10] = [ 0u8; 10 ];
 
 impl RefCountedDB {
 	/// Create a new instance given a `backing` database.
-	pub fn new(path: &str, cache_size: Option<usize>) -> RefCountedDB {
+	pub fn new(path: &str, config: DatabaseConfig) -> RefCountedDB {
-		let opts = DatabaseConfig {
+		let opts = config.prefix(DB_PREFIX_LEN);
-			// this must match account_db prefix
-			prefix_size: Some(DB_PREFIX_LEN),
-			max_open_files: 256,
-			cache_size: cache_size,
-		};
 		let backing = Database::open(&opts, path).unwrap_or_else(|e| {
 			panic!("Error opening state db: {}", e);
 		});
@@ -82,7 +77,7 @@ impl RefCountedDB {
 	fn new_temp() -> RefCountedDB {
 		let mut dir = env::temp_dir();
 		dir.push(H32::random().hex());
-		Self::new(dir.to_str().unwrap(), None)
+		Self::new(dir.to_str().unwrap(), DatabaseConfig::default())
 	}
 }
 

util/src/kvdb.rs

@@ -20,8 +20,6 @@ use std::default::Default;
 use rocksdb::{DB, Writable, WriteBatch, IteratorMode, DBVector, DBIterator,
 	IndexType, Options, DBCompactionStyle, BlockBasedOptions, Direction};
 
-const DB_FILE_SIZE_BASE: u64 = 16 * 1024 * 1024;
-const DB_FILE_SIZE_MULTIPLIER: i32 = 5;
 const DB_BACKGROUND_FLUSHES: i32 = 2;
 const DB_BACKGROUND_COMPACTIONS: i32 = 2;
 
@@ -53,6 +51,36 @@ impl DBTransaction {
 	}
 }
 
+/// Compaction profile for the database settings
+pub struct CompactionProfile {
+	/// L0-L1 target file size
+	pub initial_file_size: u64,
+	/// L2-LN target file size multiplier
+	pub file_size_multiplier: i32,
+	/// rate limiter for background flushes and compactions, bytes/sec, if any
+	pub write_rate_limit: Option<u64>,
+}
+
+impl CompactionProfile {
+	/// Default profile suitable for most storage
+	pub fn default() -> CompactionProfile {
+		CompactionProfile {
+			initial_file_size: 32 * 1024 * 1024,
+			file_size_multiplier: 2,
+			write_rate_limit: None,
+		}
+	}
+
+	/// Slow hdd compaction profile
+	pub fn hdd() -> CompactionProfile {
+		CompactionProfile {
+			initial_file_size: 192 * 1024 * 1024,
+			file_size_multiplier: 1,
+			write_rate_limit: Some(8 * 1024 * 1024),
+		}
+	}
+}
+
 /// Database configuration
 pub struct DatabaseConfig {
 	/// Optional prefix size in bytes. Allows lookup by partial key.
@@ -61,6 +89,8 @@ pub struct DatabaseConfig {
 	pub max_open_files: i32,
 	/// Cache-size
 	pub cache_size: Option<usize>,
+	/// Compaction profile
+	pub compaction: CompactionProfile,
 }
 
 impl DatabaseConfig {
@@ -69,9 +99,22 @@ impl DatabaseConfig {
 		DatabaseConfig {
 			cache_size: Some(cache_size),
 			prefix_size: None,
-			max_open_files: -1,
+			max_open_files: 256,
+			compaction: CompactionProfile::default(),
 		}
 	}
+
+	/// Modify the compaction profile
+	pub fn compaction(mut self, profile: CompactionProfile) -> Self {
+		self.compaction = profile;
+		self
+	}
+
+	/// Modify the prefix of the db
+	pub fn prefix(mut self, prefix_size: usize) -> Self {
+		self.prefix_size = Some(prefix_size);
+		self
+	}
 }
 
 impl Default for DatabaseConfig {
@@ -79,7 +122,8 @@ impl Default for DatabaseConfig {
 		DatabaseConfig {
 			cache_size: None,
 			prefix_size: None,
-			max_open_files: -1,
+			max_open_files: 256,
+			compaction: CompactionProfile::default(),
 		}
 	}
 }
@@ -111,13 +155,18 @@ impl Database {
 	/// Open database file. Creates if it does not exist.
 	pub fn open(config: &DatabaseConfig, path: &str) -> Result<Database, String> {
 		let mut opts = Options::new();
-		try!(opts.set_parsed_options("rate_limiter_bytes_per_sec=256000000"));
+		if let Some(rate_limit) = config.compaction.write_rate_limit {
+			try!(opts.set_parsed_options(&format!("rate_limiter_bytes_per_sec={}", rate_limit)));
+		}
 		opts.set_max_open_files(config.max_open_files);
 		opts.create_if_missing(true);
 		opts.set_use_fsync(false);
+
+		// compaction settings
 		opts.set_compaction_style(DBCompactionStyle::DBUniversalCompaction);
-		opts.set_target_file_size_base(DB_FILE_SIZE_BASE);
+		opts.set_target_file_size_base(config.compaction.initial_file_size);
-		opts.set_target_file_size_multiplier(DB_FILE_SIZE_MULTIPLIER);
+		opts.set_target_file_size_multiplier(config.compaction.file_size_multiplier);
+
 		opts.set_max_background_flushes(DB_BACKGROUND_FLUSHES);
 		opts.set_max_background_compactions(DB_BACKGROUND_COMPACTIONS);
 		if let Some(cache_size) = config.cache_size {
@@ -150,7 +199,16 @@ impl Database {
 			opts.set_block_based_table_factory(&block_opts);
 			opts.set_prefix_extractor_fixed_size(size);
 		}
-		let db = try!(DB::open(&opts, path));
+		let db = match DB::open(&opts, path) {
+			Ok(db) => db,
+			Err(ref s) if s.starts_with("Corruption:") => {
+				info!("{}", s);
+				info!("Attempting DB repair for {}", path);
+				try!(DB::repair(&opts, path));
+				try!(DB::open(&opts, path))
+			},
+			Err(s) => { return Err(s); }
+		};
 		Ok(Database { db: db })
 	}
 
@@ -244,10 +302,10 @@ mod tests {
 		let path = RandomTempPath::create_dir();
 		let smoke = Database::open_default(path.as_path().to_str().unwrap()).unwrap();
 		assert!(smoke.is_empty());
-		test_db(&DatabaseConfig { prefix_size: None, max_open_files: 256, cache_size: None, });
+		test_db(&DatabaseConfig::default());
-		test_db(&DatabaseConfig { prefix_size: Some(1), max_open_files: 256, cache_size: None,  });
+		test_db(&DatabaseConfig::default().prefix(12));
-		test_db(&DatabaseConfig { prefix_size: Some(8), max_open_files: 256, cache_size: None,  });
+		test_db(&DatabaseConfig::default().prefix(22));
-		test_db(&DatabaseConfig { prefix_size: Some(32), max_open_files: 256, cache_size: None,  });
+		test_db(&DatabaseConfig::default().prefix(8));
 	}
 }
 

util/src/lib.rs

@@ -117,6 +117,7 @@ extern crate libc;
 extern crate target_info;
 extern crate bigint;
 extern crate chrono;
+extern crate ansi_term;
 
 pub mod standard;
 #[macro_use]

util/src/log.rs

@@ -20,7 +20,21 @@ use std::env;
 use rlog::{LogLevelFilter};
 use env_logger::LogBuilder;
 use std::sync::{RwLock, RwLockReadGuard};
+use std::sync::atomic::{Ordering, AtomicBool};
 use arrayvec::ArrayVec;
+pub use ansi_term::{Colour, Style};
+
+lazy_static! {
+	static ref USE_COLOR: AtomicBool = AtomicBool::new(false);
+}
+
+/// Paint, using colour if desired.
+pub fn paint(c: Style, t: String) -> String {
+	match USE_COLOR.load(Ordering::Relaxed) {
+		true => format!("{}", c.paint(t)),
+		false => t,
+	}
+}
 
 lazy_static! {
 	static ref LOG_DUMMY: bool = {
@@ -57,7 +71,8 @@ impl RotatingLogger {
 
 	/// Creates new `RotatingLogger` with given levels.
 	/// It does not enforce levels - it's just read only.
-	pub fn new(levels: String) -> Self {
+	pub fn new(levels: String, enable_color: bool) -> Self {
+		USE_COLOR.store(enable_color, Ordering::Relaxed);
 		RotatingLogger {
 			levels: levels,
 			logs: RwLock::new(ArrayVec::<[_; LOG_SIZE]>::new()),
@@ -86,7 +101,7 @@ mod test {
 	use super::RotatingLogger;
 
 	fn logger() -> RotatingLogger {
-		RotatingLogger::new("test".to_owned())
+		RotatingLogger::new("test".to_owned(), false)
 	}
 
 	#[test]

util/src/network/discovery.rs

@@ -28,7 +28,7 @@ use crypto::*;
 use rlp::*;
 use network::node_table::*;
 use network::error::NetworkError;
-use io::StreamToken;
+use io::{StreamToken, IoContext};
 
 use network::PROTOCOL_VERSION;
 
@@ -283,7 +283,7 @@ impl Discovery {
 		ret
 	}
 
-	pub fn writable(&mut self) {
+	pub fn writable<Message>(&mut self, io: &IoContext<Message>) where Message: Send + Sync + Clone {
 		while !self.send_queue.is_empty() {
 			let data = self.send_queue.pop_front().unwrap();
 			match self.udp_socket.send_to(&data.payload, &data.address) {
@@ -302,15 +302,17 @@ impl Discovery {
 				}
 			}
 		}
+		io.update_registration(self.token).unwrap_or_else(|e| debug!("Error updating discovery registration: {:?}", e));
 	}
 
 	fn send_to(&mut self, payload: Bytes, address: SocketAddr) {
 		self.send_queue.push_back(Datagramm { payload: payload, address: address });
 	}
 
-	pub fn readable(&mut self) -> Option<TableUpdates> {
+	pub fn readable<Message>(&mut self, io: &IoContext<Message>) -> Option<TableUpdates> where Message: Send + Sync + Clone {
 		let mut buf: [u8; MAX_DATAGRAM_SIZE] = unsafe { mem::uninitialized() };
-		match self.udp_socket.recv_from(&mut buf) {
+		let writable = !self.send_queue.is_empty();
+		let res = match self.udp_socket.recv_from(&mut buf) {
 			Ok(Some((len, address))) => self.on_packet(&buf[0..len], address).unwrap_or_else(|e| {
 				debug!("Error processing UDP packet: {:?}", e);
 				None
@@ -320,7 +322,12 @@ impl Discovery {
 				debug!("Error reading UPD socket: {:?}", e);
 				None
 			}
+		};
+		let new_writable = !self.send_queue.is_empty();
+		if writable != new_writable {
+			io.update_registration(self.token).unwrap_or_else(|e| debug!("Error updating discovery registration: {:?}", e));
 		}
+		res
 	}
 
 	fn on_packet(&mut self, packet: &[u8], from: SocketAddr) -> Result<Option<TableUpdates>, NetworkError> {

util/src/network/host.rs

@@ -32,6 +32,8 @@ use misc::version;
 use crypto::*;
 use sha3::Hashable;
 use rlp::*;
+use log::Colour::White;
+use log::paint;
 use network::session::{Session, SessionData};
 use error::*;
 use io::*;
@@ -236,8 +238,8 @@ impl<'s, Message> NetworkContext<'s, Message> where Message: Send + Sync + Clone
 	}
 
 	/// Send an IO message
-	pub fn message(&self, msg: Message) {
+	pub fn message(&self, msg: Message) -> Result<(), UtilError> {
-		self.io.message(NetworkIoMessage::User(msg));
+		self.io.message(NetworkIoMessage::User(msg))
 	}
 
 	/// Get an IoChannel.
@@ -248,12 +250,14 @@ impl<'s, Message> NetworkContext<'s, Message> where Message: Send + Sync + Clone
 	/// Disable current protocol capability for given peer. If no capabilities left peer gets disconnected.
 	pub fn disable_peer(&self, peer: PeerId) {
 		//TODO: remove capability, disconnect if no capabilities left
-		self.io.message(NetworkIoMessage::DisablePeer(peer));
+		self.io.message(NetworkIoMessage::DisablePeer(peer))
+			.unwrap_or_else(|e| warn!("Error sending network IO message: {:?}", e));
 	}
 
 	/// Disconnect peer. Reconnect can be attempted later.
 	pub fn disconnect_peer(&self, peer: PeerId) {
-		self.io.message(NetworkIoMessage::Disconnect(peer));
+		self.io.message(NetworkIoMessage::Disconnect(peer))
+			.unwrap_or_else(|e| warn!("Error sending network IO message: {:?}", e));
 	}
 
 	/// Check if the session is still active.
@@ -267,7 +271,7 @@ impl<'s, Message> NetworkContext<'s, Message> where Message: Send + Sync + Clone
 			token: token,
 			delay: ms,
 			protocol: self.protocol,
-		});
+		}).unwrap_or_else(|e| warn!("Error sending network IO message: {:?}", e));
 		Ok(())
 	}
 
@@ -341,6 +345,7 @@ pub struct Host<Message> where Message: Send + Sync + Clone {
 	reserved_nodes: RwLock<HashSet<NodeId>>,
 	num_sessions: AtomicUsize,
 	stopping: AtomicBool,
+	first_time: AtomicBool,
 }
 
 impl<Message> Host<Message> where Message: Send + Sync + Clone {
@@ -396,6 +401,7 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 			reserved_nodes: RwLock::new(HashSet::new()),
 			num_sessions: AtomicUsize::new(0),
 			stopping: AtomicBool::new(false),
+			first_time: AtomicBool::new(true),
 		};
 
 		for n in boot_nodes {
@@ -531,7 +537,11 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 		};
 
 		self.info.write().unwrap().public_endpoint = Some(public_endpoint.clone());
-		info!("Public node URL: {}", self.external_url().unwrap());
+
+		if self.first_time.load(AtomicOrdering::Relaxed) {
+			info!("Public node URL: {}", paint(White.bold(), format!("{}", self.external_url().unwrap())));
+			self.first_time.store(false, AtomicOrdering::Relaxed);
+		}
 
 		// Initialize discovery.
 		let discovery = {
@@ -714,7 +724,6 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 				debug!(target: "network", "Can't accept connection: {:?}", e);
 			}
 		}
-		io.update_registration(TCP_ACCEPT).expect("Error registering TCP listener");
 	}
 
 	fn session_writable(&self, token: StreamToken, io: &IoContext<NetworkIoMessage<Message>>) {
@@ -910,11 +919,10 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 		match stream {
 			FIRST_SESSION ... LAST_SESSION => self.session_readable(stream, io),
 			DISCOVERY => {
-				let node_changes = { self.discovery.lock().unwrap().as_mut().unwrap().readable() };
+				let node_changes = { self.discovery.lock().unwrap().as_mut().unwrap().readable(io) };
 				if let Some(node_changes) = node_changes {
 					self.update_nodes(io, node_changes);
 				}
-				io.update_registration(DISCOVERY).expect("Error updating discovery registration");
 			},
 			TCP_ACCEPT => self.accept(io),
 			_ => panic!("Received unknown readable token"),
@@ -928,8 +936,7 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 		match stream {
 			FIRST_SESSION ... LAST_SESSION => self.session_writable(stream, io),
 			DISCOVERY => {
-				self.discovery.lock().unwrap().as_mut().unwrap().writable();
+				self.discovery.lock().unwrap().as_mut().unwrap().writable(io);
-				io.update_registration(DISCOVERY).expect("Error updating discovery registration");
 			}
 			_ => panic!("Received unknown writable token"),
 		}
@@ -946,14 +953,14 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 			FIRST_SESSION ... LAST_SESSION => self.connection_timeout(token, io),
 			DISCOVERY_REFRESH => {
 				self.discovery.lock().unwrap().as_mut().unwrap().refresh();
-				io.update_registration(DISCOVERY).expect("Error updating discovery registration");
+				io.update_registration(DISCOVERY).unwrap_or_else(|e| debug!("Error updating discovery registration: {:?}", e));
 			},
 			DISCOVERY_ROUND => {
 				let node_changes = { self.discovery.lock().unwrap().as_mut().unwrap().round() };
 				if let Some(node_changes) = node_changes {
 					self.update_nodes(io, node_changes);
 				}
-				io.update_registration(DISCOVERY).expect("Error updating discovery registration");
+				io.update_registration(DISCOVERY).unwrap_or_else(|e| debug!("Error updating discovery registration: {:?}", e));
 			},
 			NODE_TABLE => {
 				trace!(target: "network", "Refreshing node table");
@@ -1004,7 +1011,7 @@ impl<Message> IoHandler<NetworkIoMessage<Message>> for Host<Message> where Messa
 					handler_token
 				};
 				self.timers.write().unwrap().insert(handler_token, ProtocolTimer { protocol: protocol, token: *token });
-				io.register_timer(handler_token, *delay).expect("Error registering timer");
+				io.register_timer(handler_token, *delay).unwrap_or_else(|e| debug!("Error registering timer {}: {:?}", token, e));
 			},
 			NetworkIoMessage::Disconnect(ref peer) => {
 				let session = { self.sessions.read().unwrap().get(*peer).cloned() };

util/src/network/tests.rs

@@ -88,7 +88,7 @@ impl NetworkProtocolHandler<TestProtocolMessage> for TestProtocol {
 
 	/// Timer function called after a timeout created with `NetworkContext::timeout`.
 	fn timeout(&self, io: &NetworkContext<TestProtocolMessage>, timer: TimerToken) {
-		io.message(TestProtocolMessage { payload: 22 });
+		io.message(TestProtocolMessage { payload: 22 }).unwrap();
 		assert_eq!(timer, 0);
 		self.got_timeout.store(true, AtomicOrdering::Relaxed);
 	}

util/src/rlp/bytes.rs

@@ -258,14 +258,7 @@ impl <T>FromBytes for T where T: FixedHash {
 			Ordering::Equal => ()
 		};
 
-		unsafe {
+		Ok(T::from_slice(bytes))
-			use std::{mem, ptr};
-
-			let mut res: T = mem::uninitialized();
-			ptr::copy(bytes.as_ptr(), res.as_slice_mut().as_mut_ptr(), T::len());
-
-			Ok(res)
-		}
 	}
 }
 

util/src/using_queue.rs

@@ -27,6 +27,14 @@ pub struct UsingQueue<T> where T: Clone {
 	max_size: usize,
 }
 
+/// Take an item or just clone it?
+pub enum GetAction {
+	/// Remove the item, faster but you can't get it back.
+	Take,
+	/// Clone the item, slower but you can get it again.
+	Clone,
+}
+
 impl<T> UsingQueue<T> where T: Clone {
 	/// Create a new struct with a maximum size of `max_size`.
 	pub fn new(max_size: usize) -> UsingQueue<T> {
@@ -74,6 +82,20 @@ impl<T> UsingQueue<T> where T: Clone {
 		self.in_use.iter().position(|r| predicate(r)).map(|i| self.in_use.remove(i))
 	}
 
+	/// Returns `Some` item which is the first that `f` returns `true` with a reference to it
+	/// as a parameter or `None` if no such item exists in the queue.
+	pub fn clone_used_if<P>(&mut self, predicate: P) -> Option<T> where P: Fn(&T) -> bool {
+		self.in_use.iter().find(|r| predicate(r)).cloned()
+	}
+
+	/// Fork-function for `take_used_if` and `clone_used_if`.
+	pub fn get_used_if<P>(&mut self, action: GetAction, predicate: P) -> Option<T> where P: Fn(&T) -> bool {
+		match action {
+			GetAction::Take => self.take_used_if(predicate),
+			GetAction::Clone => self.clone_used_if(predicate),
+		}
+	}
+
 	/// Returns the most recently pushed block if `f` returns `true` with a reference to it as
 	/// a parameter, otherwise `None`.
 	/// Will not destroy a block if a reference to it has previously been returned by `use_last_ref`,
@@ -94,18 +116,66 @@ impl<T> UsingQueue<T> where T: Clone {
 }
 
 #[test]
-fn should_find_when_pushed() {
+fn should_not_find_when_pushed() {
 	let mut q = UsingQueue::new(2);
 	q.push(1);
 	assert!(q.take_used_if(|i| i == &1).is_none());
 }
 
+#[test]
+fn should_not_find_when_pushed_with_clone() {
+	let mut q = UsingQueue::new(2);
+	q.push(1);
+	assert!(q.clone_used_if(|i| i == &1).is_none());
+}
+
 #[test]
 fn should_find_when_pushed_and_used() {
 	let mut q = UsingQueue::new(2);
 	q.push(1);
 	q.use_last_ref();
-	assert!(q.take_used_if(|i| i == &1).is_some());
+	assert!(q.take_used_if(|i| i == &1).unwrap() == 1);
+}
+
+#[test]
+fn should_have_same_semantics_for_get_take_clone() {
+	let mut q = UsingQueue::new(2);
+	q.push(1);
+	assert!(q.get_used_if(GetAction::Clone, |i| i == &1).is_none());
+	assert!(q.get_used_if(GetAction::Take, |i| i == &1).is_none());
+	q.use_last_ref();
+	assert!(q.get_used_if(GetAction::Clone, |i| i == &1).unwrap() == 1);
+	assert!(q.get_used_if(GetAction::Clone, |i| i == &1).unwrap() == 1);
+	assert!(q.get_used_if(GetAction::Take, |i| i == &1).unwrap() == 1);
+	assert!(q.get_used_if(GetAction::Clone, |i| i == &1).is_none());
+	assert!(q.get_used_if(GetAction::Take, |i| i == &1).is_none());
+}
+
+#[test]
+fn should_find_when_pushed_and_used_with_clone() {
+	let mut q = UsingQueue::new(2);
+	q.push(1);
+	q.use_last_ref();
+	assert!(q.clone_used_if(|i| i == &1).unwrap() == 1);
+}
+
+#[test]
+fn should_not_find_again_when_pushed_and_taken() {
+	let mut q = UsingQueue::new(2);
+	q.push(1);
+	q.use_last_ref();
+	assert!(q.take_used_if(|i| i == &1).unwrap() == 1);
+	assert!(q.clone_used_if(|i| i == &1).is_none());
+}
+
+#[test]
+fn should_find_again_when_pushed_and_cloned() {
+	let mut q = UsingQueue::new(2);
+	q.push(1);
+	q.use_last_ref();
+	assert!(q.clone_used_if(|i| i == &1).unwrap() == 1);
+	assert!(q.clone_used_if(|i| i == &1).unwrap() == 1);
+	assert!(q.take_used_if(|i| i == &1).unwrap() == 1);
 }
 
 #[test]