Merge pull request #1782 from ethcore/beta-staging

BETA: fixed trace_transaction crash when block contained suicide

.travis.yml

@@ -8,20 +8,44 @@ branches:
   - /^stable-.*$/
   - /^beta$/
   - /^stable$/
+git:
+  depth: 3
 matrix:
-  fast_finish: false
+  fast_finish: true
   allow_failures:
   - rust: nightly
   include:
   - rust: stable
-    env: FEATURES="--features travis-beta" KCOV_FEATURES="" TARGETS="-p ethash -p ethcore-util -p ethcore -p ethsync -p ethcore-rpc -p parity -p ethminer" ARCHIVE_SUFFIX="-${TRAVIS_OS_NAME}-${TRAVIS_TAG}"
+    env: FEATURES="--features travis-beta" RUN_TESTS="true"
+  # - rust: beta
+    # env: FEATURES="--features travis-beta" RUN_TESTS="true"
+  - rust: stable
+    env: FEATURES="--features travis-beta" RUN_BUILD="true"
+  - rust: beta
+    env: FEATURES="--features travis-beta" RUN_BUILD="true"
+  - rust: stable
+    env: FEATURES="--features travis-beta" RUN_COVERAGE="true"
+  # - rust: nightly
+    # env: FEATURES="--features travis-nightly" RUN_BENCHES="true"
+  - rust: nightly
+    env: FEATURES="--features travis-nightly" RUN_TESTS="true"
+env:
+  global:
+  # GH_TOKEN
+  - secure: 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
+  - TARGETS="-p ethkey -p ethstore -p ethash -p ethcore-util -p ethcore -p ethsync -p ethcore-rpc -p parity -p ethjson -p ethcore-dapps -p ethcore-signer"
+  - ARCHIVE_SUFFIX="-${TRAVIS_OS_NAME}-${TRAVIS_TAG}"
+  - KCOV_FEATURES=""
+  - KCOV_CMD="./kcov-master/tmp/usr/local/bin/kcov --exclude-pattern /usr/,/.cargo,/root/.multirust,src/tests,util/json-tests,util/src/network/tests,sync/src/tests,ethcore/src/tests,ethcore/src/evm/tests,ethstore/tests target/kcov"
+  - RUN_TESTS="false"
+  - RUN_COVERAGE="false"
+  - RUN_BUILD="false"
+  - RUN_BENCHES="false"
+  - RUST_BACKTRACE="1"
 cache:
   apt: true
   directories:
-  - target/debug/deps
-  - target/debug/build
-  - target/release/deps
-  - target/release/build
+  - $TRAVIS_BUILD_DIR/target
   - $HOME/.cargo
 addons:
   apt:
@@ -29,22 +53,29 @@ addons:
     - libcurl4-openssl-dev
     - libelf-dev
     - libdw-dev
+
 script:
-- cargo build --release --verbose ${FEATURES}
-- cargo test --release --verbose ${FEATURES} ${TARGETS}
-#- cargo bench --no-run ${FEATURES} ${TARGETS}
-- tar cvzf parity${ARCHIVE_SUFFIX}.tar.gz -C target/release parity
+  - if [ "$RUN_TESTS" = "true" ]; then cargo test --release --verbose ${FEATURES} ${TARGETS}; fi
+  - if [ "$RUN_BENCHES" = "true" ]; then cargo bench --no-run ${FEATURES} ${TARGETS}; fi
+  - if [ "$RUN_BUILD" = "true" ]; then cargo build --release --verbose ${FEATURES}; fi
+  - if [ "$RUN_BUILD" = "true" ]; then tar cvzf parity${ARCHIVE_SUFFIX}.tar.gz -C target/release parity; fi
+
 after_success: |
+  [ "$RUN_COVERAGE" = "true" ] &&
   wget https://github.com/SimonKagstrom/kcov/archive/master.tar.gz &&
   tar xzf master.tar.gz && mkdir kcov-master/build && cd kcov-master/build && cmake .. && make && make install DESTDIR=../tmp && cd ../.. &&
   cargo test --no-run ${KCOV_FEATURES} ${TARGETS} &&
-  ./kcov-master/tmp/usr/local/bin/kcov --exclude-pattern /usr/,/.cargo,/root/.multirust,src/tests,util/json-tests,util/src/network/tests,sync/src/tests,ethcore/src/tests,ethcore/src/evm/tests target/kcov target/debug/deps/ethcore_util-* &&
-  ./kcov-master/tmp/usr/local/bin/kcov --exclude-pattern /usr/,/.cargo,/root/.multirust,src/tests,util/json-tests,util/src/network/tests,sync/src/tests,ethcore/src/tests,ethcore/src/evm/tests target/kcov target/debug/deps/ethash-* &&
-  ./kcov-master/tmp/usr/local/bin/kcov --exclude-pattern /usr/,/.cargo,/root/.multirust,src/tests,util/json-tests,util/src/network/tests,sync/src/tests,ethcore/src/tests,ethcore/src/evm/tests target/kcov target/debug/deps/ethcore-* &&
-  ./kcov-master/tmp/usr/local/bin/kcov --exclude-pattern /usr/,/.cargo,/root/.multirust,src/tests,util/json-tests,util/src/network/tests,sync/src/tests,ethcore/src/tests,ethcore/src/evm/tests target/kcov target/debug/deps/ethsync-* &&
-  ./kcov-master/tmp/usr/local/bin/kcov --exclude-pattern /usr/,/.cargo,/root/.multirust,src/tests,util/json-tests,util/src/network/tests,sync/src/tests,ethcore/src/tests,ethcore/src/evm/tests target/kcov target/debug/deps/ethcore_rpc-* &&
-  ./kcov-master/tmp/usr/local/bin/kcov --exclude-pattern /usr/,/.cargo,/root/.multirust,src/tests,util/json-tests,util/src/network/tests,sync/src/tests,ethcore/src/tests,ethcore/src/evm/tests target/kcov target/debug/deps/ethminer-* &&
-  ./kcov-master/tmp/usr/local/bin/kcov --coveralls-id=${TRAVIS_JOB_ID} --exclude-pattern /usr/,/.cargo,/root/.multirust target/kcov target/debug/parity-* &&
+  $KCOV_CMD target/debug/deps/ethkey-* &&
+  $KCOV_CMD target/debug/deps/ethstore-* &&
+  $KCOV_CMD target/debug/deps/ethcore_util-* &&
+  $KCOV_CMD target/debug/deps/ethash-* &&
+  $KCOV_CMD target/debug/deps/ethcore-* &&
+  $KCOV_CMD target/debug/deps/ethsync-* &&
+  $KCOV_CMD target/debug/deps/ethcore_rpc-* &&
+  $KCOV_CMD target/debug/deps/ethcore_dapps-* &&
+  $KCOV_CMD target/debug/deps/ethcore_signer-* &&
+  $KCOV_CMD target/debug/deps/ethjson-* &&
+  $KCOV_CMD target/debug/parity-* &&
   [ $TRAVIS_BRANCH = master ] &&
   [ $TRAVIS_PULL_REQUEST = false ] &&
   [ $TRAVIS_RUST_VERSION = stable ] &&
@@ -53,10 +84,6 @@ after_success: |
   pip install --user ghp-import &&
   /home/travis/.local/bin/ghp-import -n target/doc &&
   git push -fq https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages
-env:
-  global:
-  # GH_TOKEN
-  - secure: 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
 
 deploy:
   provider: releases
@@ -68,9 +95,14 @@ deploy:
     tags: true
 
 notifications:
- webhooks:
-   urls:
-     - https://hooks.slack.com/services/${SLACK_WEBHOOK}
-   on_success: always
-   on_failure: always
-   on_start: never
+  webhooks:
+    urls:
+      - https://hooks.slack.com/services/${SLACK_WEBHOOK}
+    on_success: always
+    on_failure: always
+    on_start: never
+
+notifications:
+  slack:
+    rooms:
+      - ethcore:4EGxt9WP6AS7uX4JKXSfR9vi#chatops

Cargo.toml

@@ -1,13 +1,15 @@
 [package]
 description = "Ethcore client."
 name = "parity"
-version = "1.1.0"
+version = "1.2.3"
 license = "GPL-3.0"
 authors = ["Ethcore <admin@ethcore.io>"]
 build = "build.rs"
 
 [build-dependencies]
 rustc_version = "0.1"
+syntex = "*"
+ethcore-ipc-codegen = { path = "ipc/codegen" }
 
 [dependencies]
 log = "0.3"
@@ -15,23 +17,43 @@ env_logger = "0.3"
 rustc-serialize = "0.3"
 docopt = "0.6"
 time = "0.1"
-ctrlc = { git = "https://github.com/tomusdrw/rust-ctrlc.git" }
+ctrlc = { git = "https://github.com/ethcore/rust-ctrlc.git" }
 fdlimit = { path = "util/fdlimit" }
-daemonize = "0.2"
+num_cpus = "0.2"
 number_prefix = "0.2"
-rpassword = "0.1"
-clippy = { version = "0.0.50", optional = true }
+rpassword = "0.2.1"
+clippy = { version = "0.0.77", optional = true}
 ethcore = { path = "ethcore" }
 ethcore-util = { path = "util" }
 ethsync = { path = "sync" }
-ethminer = { path = "miner" }
 ethcore-devtools = { path = "devtools" }
 ethcore-rpc = { path = "rpc", optional = true }
+ethcore-signer = { path = "signer", optional = true }
+ethcore-dapps = { path = "dapps", optional = true }
+semver = "0.2"
+ethcore-ipc-nano = { path = "ipc/nano" }
+ethcore-ipc = { path = "ipc/rpc" }
+json-ipc-server = { git = "https://github.com/ethcore/json-ipc-server.git" }
+ansi_term = "0.7"
+
+[target.'cfg(windows)'.dependencies]
+winapi = "0.2"
+
+[target.'cfg(not(windows))'.dependencies]
+daemonize = "0.2"
+
+[dependencies.hyper]
+version = "0.8"
+default-features = false
 
 [features]
-default = ["rpc"]
+default = ["rpc", "ethcore-signer", "ui", "use-precompiled-js"]
+ui = ["dapps", "ethcore-signer/ui"]
+use-precompiled-js = ["ethcore-dapps/use-precompiled-js", "ethcore-signer/use-precompiled-js"]
+dapps = ["ethcore-dapps"]
 rpc = ["ethcore-rpc"]
-dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethsync/dev", "ethcore-rpc/dev", "ethminer/dev"]
+dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethsync/dev", "ethcore-rpc/dev",
+"ethcore-dapps/dev", "ethcore-signer/dev"]
 travis-beta = ["ethcore/json-tests"]
 travis-nightly = ["ethcore/json-tests", "dev"]
 
@@ -40,5 +62,5 @@ path = "parity/main.rs"
 name = "parity"
 
 [profile.release]
-debug = false
+debug = true
 lto = false

README.md

@@ -1,4 +1,5 @@
-# ethcore
+# [Parity](https://ethcore.io/parity.html)
+### Fast, light, and robust Ethereum implementation
 
 [![Build Status][travis-image]][travis-url] [![Coverage Status][coveralls-image]][coveralls-url] [![Join the chat at https://gitter.im/trogdoro/xiki][gitter-image]][gitter-url] [![GPLv3][license-image]][license-url]
 
@@ -11,29 +12,77 @@
 [license-image]: https://img.shields.io/badge/license-GPL%20v3-green.svg
 [license-url]: http://www.gnu.org/licenses/gpl-3.0.en.html
 
-[Documentation](http://ethcore.github.io/parity/ethcore/index.html)
+[Internal Documentation](http://ethcore.github.io/parity/ethcore/index.html)
 
-### Building from source
+----
 
-First (if you don't already have it) get multirust:
+## About Parity
+
+Parity's goal is to be the fastest, lightest, and most secure Ethereum client. We are developing Parity using the sophisticated and
+cutting-edge Rust programming language. Parity is licensed under the GPLv3, and can be used for all your Ethereum needs.
+
+By default, Parity will run a JSONRPC server on `127.0.0.1:8545`. This is fully configurable and supports a number
+of RPC APIs.
+
+Parity also runs a server for running decentralized apps, or "Dapps", on `http://127.0.0.1:8080`.
+This includes a few useful Dapps, including Ethereum Wallet, Maker OTC, and a node status page.
+In a near-future release, it will be easy to install Dapps and use them through this web interface.
+
+If you run into an issue while using parity, feel free to file one in this repository
+or hop on our [gitter chat room]([gitter-url]) to ask a question. We are glad to help!
+
+Parity's current release is 1.2. You can download it at https://ethcore.io/parity.html or follow the instructions
+below to build from source.
+
+----
+
+## Build dependencies
+
+Parity is fully compatible with Stable Rust.
+
+We recommend installing Rust through [rustup](https://www.rustup.rs/). If you don't already have rustup, you can install it like this:
+
+- Linux and OSX:
+	```bash
+	$ curl https://sh.rustup.rs -sSf | sh
+	```
+
+- Windows
+
+    Make sure you have Visual Studio 2015 with C++ support installed. Next, download and run the rustup installer from
+	https://static.rust-lang.org/rustup/dist/x86_64-pc-windows-msvc/rustup-init.exe, start "VS2015 x64 Native Tools Command Prompt", and use the following command to install and set up the msvc toolchain:
+    ```
+	$ rustup default stable-x86_64-pc-windows-msvc
+    ```
+
+Once you have rustup, install parity or download and build from source
+
+----
+
+## Quick install
 
-- Linux:
 ```bash
-curl -sf https://raw.githubusercontent.com/brson/multirust/master/quick-install.sh | sudo sh -s -- --yes
+cargo install --git https://github.com/ethcore/parity.git parity
 ```
 
-- OSX with Homebrew:
-```bash
-brew update && brew install multirust
-```
+----
 
-Then, download and build Parity:
+## Build from source
 
 ```bash
 # download Parity code
-git clone https://github.com/ethcore/parity
-cd parity
+$ git clone https://github.com/ethcore/parity
+$ cd parity
 
 # build in release mode
-cargo build --release
+$ cargo build --release
 ```
+
+This will produce an executable in the `./target/release` subdirectory.
+
+To get started, just run
+```bash
+$ ./target/release/parity
+```
+
+and parity will begin syncing the Ethereum blockchain.

appveyor.yml

@@ -0,0 +1,50 @@
+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;C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A\Bin
+  - rustc -V
+  - cargo -V
+
+build: off
+
+test_script:
+  - cargo test --verbose --release
+
+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
+    name: Windows Installer (x86_64)
+  - path: target\release\parity.exe
+    name: Windows Executable (x86_64)
+  - path: target\release\parity.pdb
+    name: Windows Executable Debug Symbols (x86_64)
+
+cache:
+  - target
+  - C:\users\appveyor\.cargo -> appveyor.yml

build.rs

@@ -15,11 +15,35 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 extern crate rustc_version;
+extern crate syntex;
+extern crate ethcore_ipc_codegen as codegen;
 
+use std::env;
+use std::path::Path;
 use rustc_version::{version_meta, Channel};
 
 fn main() {
 	if let Channel::Nightly = version_meta().channel {
 		println!("cargo:rustc-cfg=nightly");
 	}
+
+	let out_dir = env::var_os("OUT_DIR").unwrap();
+
+	// ipc pass
+	{
+		let src = Path::new("parity/hypervisor/service.rs.in");
+		let dst = Path::new(&out_dir).join("hypervisor_service_ipc.rs");
+		let mut registry = syntex::Registry::new();
+		codegen::register(&mut registry);
+		registry.expand("", &src, &dst).unwrap();
+	}
+
+	// serialization pass
+	{
+		let src = Path::new(&out_dir).join("hypervisor_service_ipc.rs");
+		let dst = Path::new(&out_dir).join("hypervisor_service_cg.rs");
+		let mut registry = syntex::Registry::new();
+		codegen::register(&mut registry);
+		registry.expand("", &src, &dst).unwrap();
+	}
 }

cov.sh

@@ -16,22 +16,28 @@ if ! type kcov > /dev/null; then
 fi
 
 cargo test \
+	-p ethkey \
+	-p ethstore \
 	-p ethash \
 	-p ethcore-util \
 	-p ethcore \
 	-p ethsync \
 	-p ethcore-rpc \
 	-p parity \
-	-p ethminer \
+	-p ethcore-signer \
+	-p ethcore-dapps \
 	--no-run || exit $?
 rm -rf target/coverage
 mkdir -p target/coverage
 
-EXCLUDE="~/.multirust,rocksdb,secp256k1,src/tests,util/json-tests,util/src/network/tests,sync/src/tests,ethcore/src/tests,ethcore/src/evm/tests"
+EXCLUDE="~/.multirust,rocksdb,secp256k1,src/tests,util/json-tests,util/src/network/tests,sync/src/tests,ethcore/src/tests,ethcore/src/evm/tests,ethstore/tests"
+kcov --exclude-pattern $EXCLUDE --include-pattern src --verify target/coverage target/debug/deps/ethkey-*
+kcov --exclude-pattern $EXCLUDE --include-pattern src --verify target/coverage target/debug/deps/ethstore-*
 kcov --exclude-pattern $EXCLUDE --include-pattern src --verify target/coverage target/debug/deps/ethcore-*
 kcov --exclude-pattern $EXCLUDE --include-pattern src --verify target/coverage target/debug/deps/ethash-*
 kcov --exclude-pattern $EXCLUDE --include-pattern src --verify target/coverage target/debug/deps/ethcore_util-*
 kcov --exclude-pattern $EXCLUDE --include-pattern src --verify target/coverage target/debug/deps/ethsync-*
 kcov --exclude-pattern $EXCLUDE --include-pattern src --verify target/coverage target/debug/deps/ethcore_rpc-*
-kcov --exclude-pattern $EXCLUDE --include-pattern src --verify target/coverage target/debug/deps/ethminer-*
+kcov --exclude-pattern $EXCLUDE --include-pattern src --verify target/coverage target/debug/deps/ethcore_signer-*
+kcov --exclude-pattern $EXCLUDE --include-pattern src --verify target/coverage target/debug/deps/ethcore_dapps-*
 xdg-open target/coverage/index.html

dapps/Cargo.toml

@@ -0,0 +1,45 @@
+[package]
+description = "Parity Dapps crate"
+name = "ethcore-dapps"
+version = "1.2.0"
+license = "GPL-3.0"
+authors = ["Ethcore <admin@ethcore.io"]
+build = "build.rs"
+
+[lib]
+
+[dependencies]
+log = "0.3"
+jsonrpc-core = "2.0"
+jsonrpc-http-server = { git = "https://github.com/ethcore/jsonrpc-http-server.git" }
+hyper = { default-features = false, git = "https://github.com/ethcore/hyper" }
+url = "1.0"
+rustc-serialize = "0.3"
+serde = "0.7.0"
+serde_json = "0.7.0"
+serde_macros = { version = "0.7.0", optional = true }
+ethcore-rpc = { path = "../rpc" }
+ethcore-util = { path = "../util" }
+parity-dapps = { git = "https://github.com/ethcore/parity-ui.git", version = "0.6" }
+# List of apps
+parity-dapps-status = { git = "https://github.com/ethcore/parity-ui.git", version = "0.6" }
+parity-dapps-home = { git = "https://github.com/ethcore/parity-ui.git", version = "0.6" }
+parity-dapps-wallet = { git = "https://github.com/ethcore/parity-ui.git", version = "0.6", optional = true }
+mime_guess = { version = "1.6.1" }
+clippy = { version = "0.0.77", optional = true}
+
+[build-dependencies]
+serde_codegen = { version = "0.7.0", optional = true }
+syntex = "*"
+
+[features]
+default = ["serde_codegen", "extra-dapps"]
+extra-dapps = ["parity-dapps-wallet"]
+nightly = ["serde_macros"]
+dev = ["clippy", "ethcore-rpc/dev", "ethcore-util/dev"]
+
+use-precompiled-js = [
+	"parity-dapps-status/use-precompiled-js",
+	"parity-dapps-home/use-precompiled-js",
+	"parity-dapps-wallet/use-precompiled-js"
+]

dapps/build.rs

@@ -0,0 +1,45 @@
+// 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/>.
+
+#[cfg(not(feature = "serde_macros"))]
+mod inner {
+    extern crate syntex;
+    extern crate serde_codegen;
+
+    use std::env;
+    use std::path::Path;
+
+    pub fn main() {
+        let out_dir = env::var_os("OUT_DIR").unwrap();
+
+        let src = Path::new("./src/api/mod.rs.in");
+        let dst = Path::new(&out_dir).join("mod.rs");
+
+        let mut registry = syntex::Registry::new();
+
+        serde_codegen::register(&mut registry);
+        registry.expand("", &src, &dst).unwrap();
+    }
+}
+
+#[cfg(feature = "serde_macros")]
+mod inner {
+    pub fn main() {}
+}
+
+fn main() {
+    inner::main();
+}

dapps/src/api/api.rs

@@ -0,0 +1,69 @@
+// 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/>.
+
+use std::sync::Arc;
+use endpoint::{Endpoint, Endpoints, EndpointInfo, Handler, EndpointPath};
+
+use api::response::as_json;
+
+pub struct RestApi {
+	endpoints: Arc<Endpoints>,
+}
+
+#[derive(Debug, PartialEq, Serialize, Deserialize)]
+pub struct App {
+	pub id: String,
+	pub name: String,
+	pub description: String,
+	pub version: String,
+	pub author: String,
+	#[serde(rename="iconUrl")]
+	pub icon_url: String,
+}
+
+impl App {
+	fn from_info(id: &str, info: &EndpointInfo) -> Self {
+		App {
+			id: id.to_owned(),
+			name: info.name.to_owned(),
+			description: info.description.to_owned(),
+			version: info.version.to_owned(),
+			author: info.author.to_owned(),
+			icon_url: info.icon_url.to_owned(),
+		}
+	}
+}
+
+impl RestApi {
+	pub fn new(endpoints: Arc<Endpoints>) -> Box<Endpoint> {
+		Box::new(RestApi {
+			endpoints: endpoints
+		})
+	}
+
+	fn list_apps(&self) -> Vec<App> {
+		self.endpoints.iter().filter_map(|(ref k, ref e)| {
+			e.info().map(|ref info| App::from_info(k, info))
+		}).collect()
+	}
+}
+
+impl Endpoint for RestApi {
+	fn to_handler(&self, _path: EndpointPath) -> Box<Handler> {
+		as_json(&self.list_apps())
+	}
+}
+

dapps/src/api/mod.rs

@@ -0,0 +1,28 @@
+// 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/>.
+
+//! REST API
+
+#![warn(missing_docs)]
+#![cfg_attr(feature="nightly", feature(custom_derive, custom_attribute, plugin))]
+#![cfg_attr(feature="nightly", plugin(serde_macros, clippy))]
+
+#[cfg(feature = "serde_macros")]
+include!("mod.rs.in");
+
+#[cfg(not(feature = "serde_macros"))]
+include!(concat!(env!("OUT_DIR"), "/mod.rs"));
+

dapps/src/api/mod.rs.in

@@ -0,0 +1,21 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+mod api;
+mod response;
+
+pub use self::api::RestApi;
+pub use self::api::App;

dapps/src/api/response.rs

@@ -0,0 +1,23 @@
+// 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/>.
+
+use serde::Serialize;
+use serde_json;
+use endpoint::{ContentHandler, Handler};
+
+pub fn as_json<T : Serialize>(val: &T) -> Box<Handler> {
+	Box::new(ContentHandler::new(serde_json::to_string(val).unwrap(), "application/json".to_owned()))
+}

dapps/src/apps/fs.rs

@@ -0,0 +1,116 @@
+// 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/>.
+
+use serde_json;
+use std::io;
+use std::io::Read;
+use std::fs;
+use std::path::PathBuf;
+use page::LocalPageEndpoint;
+use endpoint::{Endpoints, EndpointInfo};
+use api::App;
+
+struct LocalDapp {
+	id: String,
+	path: PathBuf,
+	info: EndpointInfo,
+}
+
+fn local_dapps(dapps_path: String) -> Vec<LocalDapp> {
+	let files = fs::read_dir(dapps_path.as_str());
+	if let Err(e) = files {
+		warn!(target: "dapps", "Unable to load local dapps from: {}. Reason: {:?}", dapps_path, e);
+		return vec![];
+	}
+
+	let files = files.expect("Check is done earlier");
+	files.map(|dir| {
+			let entry = try!(dir);
+			let file_type = try!(entry.file_type());
+
+			// skip files
+			if file_type.is_file() {
+				return Err(io::Error::new(io::ErrorKind::NotFound, "Not a file"));
+			}
+
+			// take directory name and path
+			entry.file_name().into_string()
+				.map(|name| (name, entry.path()))
+				.map_err(|e| {
+					info!(target: "dapps", "Unable to load dapp: {:?}. Reason: {:?}", entry.path(), e);
+					io::Error::new(io::ErrorKind::NotFound, "Invalid name")
+				})
+		})
+		.filter_map(|m| {
+			if let Err(ref e) = m {
+				debug!(target: "dapps", "Ignoring local dapp: {:?}", e);
+			}
+			m.ok()
+		})
+		.map(|(name, path)| {
+			// try to get manifest file
+			let info = read_manifest(&name, path.clone());
+			LocalDapp {
+				id: name,
+				path: path,
+				info: info,
+			}
+		})
+		.collect()
+}
+
+fn read_manifest(name: &str, mut path: PathBuf) -> EndpointInfo {
+	path.push("manifest.json");
+
+	fs::File::open(path.clone())
+		.map_err(|e| format!("{:?}", e))
+		.and_then(|mut f| {
+			// Reat file
+			let mut s = String::new();
+			try!(f.read_to_string(&mut s).map_err(|e| format!("{:?}", e)));
+			// Try to deserialize manifest
+			serde_json::from_str::<App>(&s).map_err(|e| format!("{:?}", e))
+		})
+		.map(|app| EndpointInfo {
+			name: app.name,
+			description: app.description,
+			version: app.version,
+			author: app.author,
+			icon_url: app.icon_url,
+		})
+		.unwrap_or_else(|e| {
+			warn!(target: "dapps", "Cannot read manifest file at: {:?}. Error: {:?}", path, e);
+
+			EndpointInfo {
+				name: name.into(),
+				description: name.into(),
+				version: "0.0.0".into(),
+				author: "?".into(),
+				icon_url: "icon.png".into(),
+			}
+		})
+}
+
+pub fn local_endpoints(dapps_path: String) -> Endpoints {
+	let mut pages = Endpoints::new();
+	for dapp in local_dapps(dapps_path) {
+		pages.insert(
+			dapp.id,
+			Box::new(LocalPageEndpoint::new(dapp.path, dapp.info))
+		);
+	}
+	pages
+}

dapps/src/apps/mod.rs

@@ -0,0 +1,69 @@
+// 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/>.
+
+use endpoint::{Endpoints, Endpoint};
+use page::PageEndpoint;
+use proxypac::ProxyPac;
+use parity_dapps::WebApp;
+
+mod fs;
+
+extern crate parity_dapps_status;
+extern crate parity_dapps_home;
+
+pub const DAPPS_DOMAIN : &'static str = ".parity";
+pub const RPC_PATH : &'static str =  "rpc";
+pub const API_PATH : &'static str =  "api";
+pub const UTILS_PATH : &'static str =  "parity-utils";
+
+pub fn main_page() -> &'static str {
+	"/home/"
+}
+
+pub fn utils() -> Box<Endpoint> {
+	Box::new(PageEndpoint::with_prefix(parity_dapps_home::App::default(), UTILS_PATH.to_owned()))
+}
+
+pub fn all_endpoints(dapps_path: String) -> Endpoints {
+	// fetch fs dapps at first to avoid overwriting builtins
+	let mut pages = fs::local_endpoints(dapps_path);
+	// Home page needs to be safe embed
+	// because we use Cross-Origin LocalStorage.
+	// TODO [ToDr] Account naming should be moved to parity.
+	pages.insert("home".into(), Box::new(
+		PageEndpoint::new_safe_to_embed(parity_dapps_home::App::default())
+	));
+	pages.insert("proxy".into(), ProxyPac::boxed());
+	insert::<parity_dapps_status::App>(&mut pages, "parity");
+	insert::<parity_dapps_status::App>(&mut pages, "status");
+
+	// Optional dapps
+	wallet_page(&mut pages);
+
+	pages
+}
+
+#[cfg(feature = "parity-dapps-wallet")]
+fn wallet_page(pages: &mut Endpoints) {
+	extern crate parity_dapps_wallet;
+	insert::<parity_dapps_wallet::App>(pages, "wallet");
+}
+#[cfg(not(feature = "parity-dapps-wallet"))]
+fn wallet_page(_pages: &mut Endpoints) {}
+
+fn insert<T : WebApp + Default + 'static>(pages: &mut Endpoints, id: &str) {
+	pages.insert(id.to_owned(), Box::new(PageEndpoint::new(T::default())));
+}

dapps/src/endpoint.rs

@@ -0,0 +1,99 @@
+// 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/>.
+
+//! URL Endpoint traits
+
+use hyper::status::StatusCode;
+use hyper::{header, server, Decoder, Encoder, Next};
+use hyper::net::HttpStream;
+
+use std::io::Write;
+use std::collections::BTreeMap;
+
+#[derive(Debug, PartialEq, Default, Clone)]
+pub struct EndpointPath {
+	pub app_id: String,
+	pub host: String,
+	pub port: u16,
+}
+
+#[derive(Debug, PartialEq, Clone)]
+pub struct EndpointInfo {
+	pub name: String,
+	pub description: String,
+	pub version: String,
+	pub author: String,
+	pub icon_url: String,
+}
+
+pub trait Endpoint : Send + Sync {
+	fn info(&self) -> Option<&EndpointInfo> { None }
+
+	fn to_handler(&self, path: EndpointPath) -> Box<server::Handler<HttpStream> + Send>;
+}
+
+pub type Endpoints = BTreeMap<String, Box<Endpoint>>;
+pub type Handler = server::Handler<HttpStream> + Send;
+
+pub struct ContentHandler {
+	content: String,
+	mimetype: String,
+	write_pos: usize,
+}
+
+impl ContentHandler {
+	pub fn new(content: String, mimetype: String) -> Self {
+		ContentHandler {
+			content: content,
+			mimetype: mimetype,
+			write_pos: 0
+		}
+	}
+}
+
+impl server::Handler<HttpStream> for ContentHandler {
+	fn on_request(&mut self, _request: server::Request<HttpStream>) -> Next {
+		Next::write()
+	}
+
+	fn on_request_readable(&mut self, _decoder: &mut Decoder<HttpStream>) -> Next {
+		Next::write()
+	}
+
+	fn on_response(&mut self, res: &mut server::Response) -> Next {
+		res.set_status(StatusCode::Ok);
+		res.headers_mut().set(header::ContentType(self.mimetype.parse().unwrap()));
+		Next::write()
+	}
+
+	fn on_response_writable(&mut self, encoder: &mut Encoder<HttpStream>) -> Next {
+		let bytes = self.content.as_bytes();
+		if self.write_pos == bytes.len() {
+			return Next::end();
+		}
+
+		match encoder.write(&bytes[self.write_pos..]) {
+			Ok(bytes) => {
+				self.write_pos += bytes;
+				Next::write()
+			},
+			Err(e) => match e.kind() {
+				::std::io::ErrorKind::WouldBlock => Next::write(),
+				_ => Next::end()
+			},
+		}
+	}
+}

dapps/src/lib.rs

@@ -0,0 +1,177 @@
+// 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/>.
+
+//! Ethcore Webapplications for Parity
+//! ```
+//! extern crate jsonrpc_core;
+//! extern crate ethcore_dapps;
+//!
+//! use std::sync::Arc;
+//! use jsonrpc_core::IoHandler;
+//! use ethcore_dapps::*;
+//!
+//! struct SayHello;
+//! impl MethodCommand for SayHello {
+//! 	fn execute(&self, _params: Params) -> Result<Value, Error> {
+//! 		Ok(Value::String("hello".to_string()))
+//! 	}
+//! }
+//!
+//! fn main() {
+//! 	let io = IoHandler::new();
+//! 	io.add_method("say_hello", SayHello);
+//! 	let _server = Server::start_unsecure_http(
+//! 		&"127.0.0.1:3030".parse().unwrap(),
+//! 		Arc::new(io)
+//! 	);
+//! }
+//! ```
+//!
+#![warn(missing_docs)]
+#![cfg_attr(feature="nightly", plugin(clippy))]
+
+#[macro_use]
+extern crate log;
+extern crate url;
+extern crate hyper;
+extern crate serde;
+extern crate serde_json;
+extern crate jsonrpc_core;
+extern crate jsonrpc_http_server;
+extern crate parity_dapps;
+extern crate ethcore_rpc;
+extern crate mime_guess;
+
+mod endpoint;
+mod apps;
+mod page;
+mod router;
+mod rpc;
+mod api;
+mod proxypac;
+
+use std::sync::{Arc, Mutex};
+use std::net::SocketAddr;
+use std::collections::HashMap;
+use jsonrpc_core::{IoHandler, IoDelegate};
+use router::auth::{Authorization, NoAuth, HttpBasicAuth};
+use ethcore_rpc::Extendable;
+
+static DAPPS_DOMAIN : &'static str = ".parity";
+
+/// Webapps HTTP+RPC server build.
+pub struct ServerBuilder {
+	dapps_path: String,
+	handler: Arc<IoHandler>,
+}
+
+impl Extendable for ServerBuilder {
+	fn add_delegate<D: Send + Sync + 'static>(&self, delegate: IoDelegate<D>) {
+		self.handler.add_delegate(delegate);
+	}
+}
+
+impl ServerBuilder {
+	/// Construct new dapps server
+	pub fn new(dapps_path: String) -> Self {
+		ServerBuilder {
+			dapps_path: dapps_path,
+			handler: Arc::new(IoHandler::new())
+		}
+	}
+
+	/// Asynchronously start server with no authentication,
+	/// returns result with `Server` handle on success or an error.
+	pub fn start_unsecure_http(&self, addr: &SocketAddr) -> Result<Server, ServerError> {
+		Server::start_http(addr, NoAuth, self.handler.clone(), self.dapps_path.clone())
+	}
+
+	/// Asynchronously start server with `HTTP Basic Authentication`,
+	/// return result with `Server` handle on success or an error.
+	pub fn start_basic_auth_http(&self, addr: &SocketAddr, username: &str, password: &str) -> Result<Server, ServerError> {
+		Server::start_http(addr, HttpBasicAuth::single_user(username, password), self.handler.clone(), self.dapps_path.clone())
+	}
+}
+
+/// Webapps HTTP server.
+pub struct Server {
+	server: Option<hyper::server::Listening>,
+	panic_handler: Arc<Mutex<Option<Box<Fn() -> () + Send>>>>,
+}
+
+impl Server {
+	fn start_http<A: Authorization + 'static>(addr: &SocketAddr, authorization: A, handler: Arc<IoHandler>, dapps_path: String) -> Result<Server, ServerError> {
+		let panic_handler = Arc::new(Mutex::new(None));
+		let authorization = Arc::new(authorization);
+		let endpoints = Arc::new(apps::all_endpoints(dapps_path));
+		let special = Arc::new({
+			let mut special = HashMap::new();
+			special.insert(router::SpecialEndpoint::Rpc, rpc::rpc(handler, panic_handler.clone()));
+			special.insert(router::SpecialEndpoint::Api, api::RestApi::new(endpoints.clone()));
+			special.insert(router::SpecialEndpoint::Utils, apps::utils());
+			special
+		});
+
+		try!(hyper::Server::http(addr))
+			.handle(move |_| router::Router::new(
+				apps::main_page(),
+				endpoints.clone(),
+				special.clone(),
+				authorization.clone(),
+			))
+			.map(|(l, srv)| {
+
+				::std::thread::spawn(move || {
+					srv.run();
+				});
+
+				Server {
+					server: Some(l),
+					panic_handler: panic_handler,
+				}
+			})
+			.map_err(ServerError::from)
+	}
+
+	/// Set callback for panics.
+	pub fn set_panic_handler<F>(&self, handler: F) where F : Fn() -> () + Send + 'static {
+		*self.panic_handler.lock().unwrap() = Some(Box::new(handler));
+	}
+}
+
+impl Drop for Server {
+	fn drop(&mut self) {
+		self.server.take().unwrap().close()
+	}
+}
+
+/// Webapp Server startup error
+#[derive(Debug)]
+pub enum ServerError {
+	/// Wrapped `std::io::Error`
+	IoError(std::io::Error),
+	/// Other `hyper` error
+	Other(hyper::error::Error),
+}
+
+impl From<hyper::error::Error> for ServerError {
+	fn from(err: hyper::error::Error) -> Self {
+		match err {
+			hyper::error::Error::Io(e) => ServerError::IoError(e),
+			e => ServerError::Other(e),
+		}
+	}
+}

dapps/src/page/builtin.rs

@@ -0,0 +1,154 @@
+// 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/>.
+
+use page::handler;
+use std::sync::Arc;
+use endpoint::{Endpoint, EndpointInfo, EndpointPath, Handler};
+use parity_dapps::{WebApp, File, Info};
+
+pub struct PageEndpoint<T : WebApp + 'static> {
+	/// Content of the files
+	pub app: Arc<T>,
+	/// Prefix to strip from the path (when `None` deducted from `app_id`)
+	pub prefix: Option<String>,
+	/// Safe to be loaded in frame by other origin. (use wisely!)
+	safe_to_embed: bool,
+	info: EndpointInfo,
+}
+
+impl<T: WebApp + 'static> PageEndpoint<T> {
+	/// Creates new `PageEndpoint` for builtin (compile time) Dapp.
+	pub fn new(app: T) -> Self {
+		let info = app.info();
+		PageEndpoint {
+			app: Arc::new(app),
+			prefix: None,
+			safe_to_embed: false,
+			info: EndpointInfo::from(info),
+		}
+	}
+
+	/// Create new `PageEndpoint` and specify prefix that should be removed before looking for a file.
+	/// It's used only for special endpoints (i.e. `/parity-utils/`)
+	/// So `/parity-utils/inject.js` will be resolved to `/inject.js` is prefix is set.
+	pub fn with_prefix(app: T, prefix: String) -> Self {
+		let info = app.info();
+		PageEndpoint {
+			app: Arc::new(app),
+			prefix: Some(prefix),
+			safe_to_embed: false,
+			info: EndpointInfo::from(info),
+		}
+	}
+
+	/// Creates new `PageEndpoint` which can be safely used in iframe
+	/// even from different origin. It might be dangerous (clickjacking).
+	/// Use wisely!
+	pub fn new_safe_to_embed(app: T) -> Self {
+		let info = app.info();
+		PageEndpoint {
+			app: Arc::new(app),
+			prefix: None,
+			safe_to_embed: true,
+			info: EndpointInfo::from(info),
+		}
+	}
+}
+
+impl<T: WebApp> Endpoint for PageEndpoint<T> {
+
+	fn info(&self) -> Option<&EndpointInfo> {
+		Some(&self.info)
+	}
+
+	fn to_handler(&self, path: EndpointPath) -> Box<Handler> {
+		Box::new(handler::PageHandler {
+			app: BuiltinDapp::new(self.app.clone()),
+			prefix: self.prefix.clone(),
+			path: path,
+			file: None,
+			safe_to_embed: self.safe_to_embed,
+		})
+	}
+}
+
+impl From<Info> for EndpointInfo {
+	fn from(info: Info) -> Self {
+		EndpointInfo {
+			name: info.name.into(),
+			description: info.description.into(),
+			author: info.author.into(),
+			icon_url: info.icon_url.into(),
+			version: info.version.into(),
+		}
+	}
+}
+
+struct BuiltinDapp<T: WebApp + 'static> {
+	app: Arc<T>,
+}
+
+impl<T: WebApp + 'static> BuiltinDapp<T> {
+	fn new(app: Arc<T>) -> Self {
+		BuiltinDapp {
+			app: app,
+		}
+	}
+}
+
+impl<T: WebApp + 'static> handler::Dapp for BuiltinDapp<T> {
+	type DappFile = BuiltinDappFile<T>;
+
+	fn file(&self, path: &str) -> Option<Self::DappFile> {
+		self.app.file(path).map(|_| {
+			BuiltinDappFile {
+				app: self.app.clone(),
+				path: path.into(),
+				write_pos: 0,
+			}
+		})
+	}
+}
+
+struct BuiltinDappFile<T: WebApp + 'static> {
+	app: Arc<T>,
+	path: String,
+	write_pos: usize,
+}
+
+impl<T: WebApp + 'static> BuiltinDappFile<T> {
+	fn file(&self) -> &File {
+		self.app.file(&self.path).expect("Check is done when structure is created.")
+	}
+}
+
+impl<T: WebApp + 'static> handler::DappFile for BuiltinDappFile<T> {
+	fn content_type(&self) -> &str {
+		self.file().content_type
+	}
+
+	fn is_drained(&self) -> bool {
+		self.write_pos == self.file().content.len()
+	}
+
+	fn next_chunk(&mut self) -> &[u8] {
+		&self.file().content[self.write_pos..]
+	}
+
+	fn bytes_written(&mut self, bytes: usize) {
+		self.write_pos += bytes;
+	}
+}

dapps/src/page/handler.rs

@@ -0,0 +1,207 @@
+// 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/>.
+
+use std::io::Write;
+use hyper::header;
+use hyper::server;
+use hyper::uri::RequestUri;
+use hyper::net::HttpStream;
+use hyper::status::StatusCode;
+use hyper::{Decoder, Encoder, Next};
+use endpoint::EndpointPath;
+
+/// Represents a file that can be sent to client.
+/// Implementation should keep track of bytes already sent internally.
+pub trait DappFile: Send {
+	/// Returns a content-type of this file.
+	fn content_type(&self) -> &str;
+
+	/// Checks if all bytes from that file were written.
+	fn is_drained(&self) -> bool;
+
+	/// Fetch next chunk to write to the client.
+	fn next_chunk(&mut self) -> &[u8];
+
+	/// How many files have been written to the client.
+	fn bytes_written(&mut self, bytes: usize);
+}
+
+/// Dapp as a (dynamic) set of files.
+pub trait Dapp: Send + 'static {
+	/// File type
+	type DappFile: DappFile;
+
+	/// Returns file under given path.
+	fn file(&self, path: &str) -> Option<Self::DappFile>;
+}
+
+/// A handler for a single webapp.
+/// Resolves correct paths and serves as a plumbing code between
+/// hyper server and dapp.
+pub struct PageHandler<T: Dapp> {
+	/// A Dapp.
+	pub app: T,
+	/// File currently being served (or `None` if file does not exist).
+	pub file: Option<T::DappFile>,
+	/// Optional prefix to strip from path.
+	pub prefix: Option<String>,
+	/// Requested path.
+	pub path: EndpointPath,
+	/// Flag indicating if the file can be safely embeded (put in iframe).
+	pub safe_to_embed: bool,
+}
+
+impl<T: Dapp> PageHandler<T> {
+	fn extract_path(&self, path: &str) -> String {
+		let app_id = &self.path.app_id;
+		let prefix = "/".to_owned() + self.prefix.as_ref().unwrap_or(app_id);
+		let prefix_with_slash = prefix.clone() + "/";
+		let query_pos = path.find('?').unwrap_or_else(|| path.len());
+
+		// Index file support
+		match path == "/" || path == &prefix || path == &prefix_with_slash {
+			true => "index.html".to_owned(),
+			false => if path.starts_with(&prefix_with_slash) {
+				path[prefix_with_slash.len()..query_pos].to_owned()
+			} else if path.starts_with("/") {
+				path[1..query_pos].to_owned()
+			} else {
+				path[0..query_pos].to_owned()
+			}
+		}
+	}
+}
+
+impl<T: Dapp> server::Handler<HttpStream> for PageHandler<T> {
+	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))
+			},
+			RequestUri::AbsoluteUri(ref url) => {
+				self.app.file(&self.extract_path(url.path()))
+			},
+			_ => None,
+		};
+		Next::write()
+	}
+
+	fn on_request_readable(&mut self, _decoder: &mut Decoder<HttpStream>) -> Next {
+		Next::write()
+	}
+
+	fn on_response(&mut self, res: &mut server::Response) -> Next {
+		if let Some(ref f) = self.file {
+			res.set_status(StatusCode::Ok);
+			res.headers_mut().set(header::ContentType(f.content_type().parse().unwrap()));
+			if !self.safe_to_embed {
+				res.headers_mut().set_raw("X-Frame-Options", vec![b"SAMEORIGIN".to_vec()]);
+			}
+			Next::write()
+		} else {
+			res.set_status(StatusCode::NotFound);
+			Next::write()
+		}
+	}
+
+	fn on_response_writable(&mut self, encoder: &mut Encoder<HttpStream>) -> Next {
+		match self.file {
+			None => Next::end(),
+			Some(ref f) if f.is_drained() => Next::end(),
+			Some(ref mut f) => match encoder.write(f.next_chunk()) {
+				Ok(bytes) => {
+					f.bytes_written(bytes);
+					Next::write()
+				},
+				Err(e) => match e.kind() {
+					::std::io::ErrorKind::WouldBlock => Next::write(),
+					_ => Next::end(),
+				},
+			}
+		}
+	}
+}
+
+
+
+#[cfg(test)]
+mod test {
+	use super::*;
+
+	pub struct TestWebAppFile;
+
+	impl DappFile for TestWebAppFile {
+		fn content_type(&self) -> &str {
+			unimplemented!()
+		}
+
+		fn is_drained(&self) -> bool {
+			unimplemented!()
+		}
+
+		fn next_chunk(&mut self) -> &[u8] {
+			unimplemented!()
+		}
+
+		fn bytes_written(&mut self, _bytes: usize) {
+			unimplemented!()
+		}
+	}
+
+	#[derive(Default)]
+	pub struct TestWebapp;
+
+	impl Dapp for TestWebapp {
+		type DappFile = TestWebAppFile;
+
+		fn file(&self, _path: &str) -> Option<Self::DappFile> {
+			None
+		}
+	}
+}
+
+#[test]
+fn should_extract_path_with_appid() {
+
+	// given
+	let path1 = "/";
+	let path2= "/test.css";
+	let path3 = "/app/myfile.txt";
+	let path4 = "/app/myfile.txt?query=123";
+	let page_handler = PageHandler {
+		app: test::TestWebapp,
+		prefix: None,
+		path: EndpointPath {
+			app_id: "app".to_owned(),
+			host: "".to_owned(),
+			port: 8080
+		},
+		file: None,
+		safe_to_embed: true,
+	};
+
+	// when
+	let res1 = page_handler.extract_path(path1);
+	let res2 = page_handler.extract_path(path2);
+	let res3 = page_handler.extract_path(path3);
+	let res4 = page_handler.extract_path(path4);
+
+	// then
+	assert_eq!(&res1, "index.html");
+	assert_eq!(&res2, "test.css");
+	assert_eq!(&res3, "myfile.txt");
+	assert_eq!(&res4, "myfile.txt");
+}

dapps/src/page/local.rs

@@ -0,0 +1,118 @@
+// 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/>.
+
+use mime_guess;
+use std::io::{Seek, Read, SeekFrom};
+use std::fs;
+use std::path::PathBuf;
+use page::handler;
+use endpoint::{Endpoint, EndpointInfo, EndpointPath, Handler};
+
+pub struct LocalPageEndpoint {
+	path: PathBuf,
+	info: EndpointInfo,
+}
+
+impl LocalPageEndpoint {
+	pub fn new(path: PathBuf, info: EndpointInfo) -> Self {
+		LocalPageEndpoint {
+			path: path,
+			info: info,
+		}
+	}
+}
+
+impl Endpoint for LocalPageEndpoint {
+	fn info(&self) -> Option<&EndpointInfo> {
+		Some(&self.info)
+	}
+
+	fn to_handler(&self, path: EndpointPath) -> Box<Handler> {
+		Box::new(handler::PageHandler {
+			app: LocalDapp::new(self.path.clone()),
+			prefix: None,
+			path: path,
+			file: None,
+			safe_to_embed: false,
+		})
+	}
+}
+
+struct LocalDapp {
+	path: PathBuf,
+}
+
+impl LocalDapp {
+	fn new(path: PathBuf) -> Self {
+		LocalDapp {
+			path: path
+		}
+	}
+}
+
+impl handler::Dapp for LocalDapp {
+	type DappFile = LocalFile;
+
+	fn file(&self, file_path: &str) -> Option<Self::DappFile> {
+		let mut path = self.path.clone();
+		for part in file_path.split('/') {
+			path.push(part);
+		}
+		// Check if file exists
+		fs::File::open(path.clone()).ok().map(|file| {
+			let content_type = mime_guess::guess_mime_type(path);
+			let len = file.metadata().ok().map_or(0, |meta| meta.len());
+			LocalFile {
+				content_type: content_type.to_string(),
+				buffer: [0; 4096],
+				file: file,
+				pos: 0,
+				len: len,
+			}
+		})
+	}
+}
+
+struct LocalFile {
+	content_type: String,
+	buffer: [u8; 4096],
+	file: fs::File,
+	len: u64,
+	pos: u64,
+}
+
+impl handler::DappFile for LocalFile {
+	fn content_type(&self) -> &str {
+		&self.content_type
+	}
+
+	fn is_drained(&self) -> bool {
+		self.pos == self.len
+	}
+
+	fn next_chunk(&mut self) -> &[u8] {
+		let _ = self.file.seek(SeekFrom::Start(self.pos));
+		if let Ok(n) = self.file.read(&mut self.buffer) {
+			&self.buffer[0..n]
+		} else {
+			&self.buffer[0..0]
+		}
+	}
+
+	fn bytes_written(&mut self, bytes: usize) {
+		self.pos += bytes as u64;
+	}
+}

dapps/src/page/mod.rs

@@ -0,0 +1,24 @@
+// 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/>.
+
+
+mod builtin;
+mod local;
+mod handler;
+
+pub use self::local::LocalPageEndpoint;
+pub use self::builtin::PageEndpoint;
+

dapps/src/proxypac.rs

@@ -0,0 +1,48 @@
+// 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/>.
+
+//! Serving ProxyPac file
+
+use endpoint::{Endpoint, Handler, ContentHandler, EndpointPath};
+use apps::DAPPS_DOMAIN;
+
+pub struct ProxyPac;
+
+impl ProxyPac {
+	pub fn boxed() -> Box<Endpoint> {
+		Box::new(ProxyPac)
+	}
+}
+
+impl Endpoint for ProxyPac {
+	fn to_handler(&self, path: EndpointPath) -> Box<Handler> {
+		let content = format!(
+r#"
+function FindProxyForURL(url, host) {{
+	if (shExpMatch(host, "*{0}"))
+	{{
+		return "PROXY {1}:{2}";
+	}}
+
+	return "DIRECT";
+}}
+"#,
+			DAPPS_DOMAIN, path.host, path.port);
+		Box::new(ContentHandler::new(content, "application/javascript".to_owned()))
+	}
+}
+
+

dapps/src/router/auth.rs

@@ -0,0 +1,161 @@
+// 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/>.
+
+//! HTTP Authorization implementations
+
+use std::io::Write;
+use std::collections::HashMap;
+use hyper::{header, server, Decoder, Encoder, Next};
+use hyper::net::HttpStream;
+use hyper::status::StatusCode;
+
+/// Authorization result
+pub enum Authorized {
+	/// Authorization was successful.
+	Yes,
+	/// Unsuccessful authorization. Handler for further work is returned.
+	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<HttpStream>)-> Authorized;
+}
+
+/// HTTP Basic Authorization handler
+pub struct HttpBasicAuth {
+	users: HashMap<String, String>,
+}
+
+/// No-authorization implementation (authorization disabled)
+pub struct NoAuth;
+
+impl Authorization for NoAuth {
+	fn is_authorized(&self, _req: &server::Request<HttpStream>)-> Authorized {
+		Authorized::Yes
+	}
+}
+
+impl Authorization for HttpBasicAuth {
+	fn is_authorized(&self, req: &server::Request<HttpStream>) -> Authorized {
+		let auth = self.check_auth(&req);
+
+		match auth {
+			Access::Denied => {
+				Authorized::No(Box::new(UnauthorizedHandler { write_pos: 0 }))
+			},
+			Access::AuthRequired => {
+				Authorized::No(Box::new(AuthRequiredHandler))
+			},
+			Access::Granted => {
+				Authorized::Yes
+			},
+		}
+	}
+}
+
+#[derive(Debug)]
+enum Access {
+	Granted,
+	Denied,
+	AuthRequired,
+}
+
+impl HttpBasicAuth {
+	/// Creates `HttpBasicAuth` instance with only one user.
+	pub fn single_user(username: &str, password: &str) -> Self {
+		let mut users = HashMap::new();
+		users.insert(username.to_owned(), password.to_owned());
+		HttpBasicAuth {
+			users: users
+		}
+	}
+
+	fn is_authorized(&self, username: &str, password: &str) -> bool {
+		self.users.get(&username.to_owned()).map_or(false, |pass| pass == password)
+	}
+
+	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) }
+			)) if self.is_authorized(username, password) => Access::Granted,
+			Some(_) => Access::Denied,
+			None => Access::AuthRequired,
+		}
+	}
+}
+
+pub struct UnauthorizedHandler {
+	write_pos: usize,
+}
+
+impl server::Handler<HttpStream> for UnauthorizedHandler {
+	fn on_request(&mut self, _request: server::Request<HttpStream>) -> Next {
+		Next::write()
+	}
+
+	fn on_request_readable(&mut self, _decoder: &mut Decoder<HttpStream>) -> Next {
+		Next::write()
+	}
+
+	fn on_response(&mut self, res: &mut server::Response) -> Next {
+		res.set_status(StatusCode::Unauthorized);
+		Next::write()
+	}
+
+	fn on_response_writable(&mut self, encoder: &mut Encoder<HttpStream>) -> Next {
+		let response = "Unauthorized".as_bytes();
+
+		if self.write_pos == response.len() {
+			return Next::end();
+		}
+
+		match encoder.write(&response[self.write_pos..]) {
+			Ok(bytes) => {
+				self.write_pos += bytes;
+				Next::write()
+			},
+			Err(e) => match e.kind() {
+				::std::io::ErrorKind::WouldBlock => Next::write(),
+				_ => Next::end()
+			},
+		}
+	}
+}
+
+pub struct AuthRequiredHandler;
+
+impl server::Handler<HttpStream> for AuthRequiredHandler {
+	fn on_request(&mut self, _request: server::Request<HttpStream>) -> Next {
+		Next::write()
+	}
+
+	fn on_request_readable(&mut self, _decoder: &mut Decoder<HttpStream>) -> Next {
+		Next::write()
+	}
+
+	fn on_response(&mut self, res: &mut server::Response) -> Next {
+		res.set_status(StatusCode::Unauthorized);
+		res.headers_mut().set_raw("WWW-Authenticate", vec![b"Basic realm=\"Parity\"".to_vec()]);
+		Next::write()
+	}
+
+	fn on_response_writable(&mut self, _encoder: &mut Encoder<HttpStream>) -> Next {
+		Next::end()
+	}
+}

dapps/src/router/mod.rs

@@ -0,0 +1,255 @@
+// 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/>.
+
+//! Router implementation
+//! Processes request handling authorization and dispatching it to proper application.
+
+mod url;
+mod redirect;
+pub mod auth;
+
+use DAPPS_DOMAIN;
+use std::sync::Arc;
+use std::collections::HashMap;
+use url::Host;
+use hyper;
+use hyper::{server, uri, header};
+use hyper::{Next, Encoder, Decoder};
+use hyper::net::HttpStream;
+use apps;
+use endpoint::{Endpoint, Endpoints, EndpointPath};
+use self::url::Url;
+use self::auth::{Authorization, Authorized};
+use self::redirect::Redirection;
+
+/// Special endpoints are accessible on every domain (every dapp)
+#[derive(Debug, PartialEq, Hash, Eq)]
+pub enum SpecialEndpoint {
+	Rpc,
+	Api,
+	Utils,
+	None,
+}
+
+pub struct Router<A: Authorization + 'static> {
+	main_page: &'static str,
+	endpoints: Arc<Endpoints>,
+	special: Arc<HashMap<SpecialEndpoint, Box<Endpoint>>>,
+	authorization: Arc<A>,
+	handler: Box<server::Handler<HttpStream> + Send>,
+}
+
+impl<A: Authorization + 'static> server::Handler<HttpStream> for Router<A> {
+
+	fn on_request(&mut self, req: server::Request<HttpStream>) -> Next {
+		// Check authorization
+		let auth = self.authorization.is_authorized(&req);
+
+		// Choose proper handler depending on path / domain
+		self.handler = match auth {
+			Authorized::No(handler) => handler,
+			Authorized::Yes => {
+				let url = extract_url(&req);
+				let endpoint = extract_endpoint(&url);
+
+				match endpoint {
+					// First check special endpoints
+					(ref path, ref endpoint) if self.special.contains_key(endpoint) => {
+						self.special.get(endpoint).unwrap().to_handler(path.clone().unwrap_or_default())
+					},
+					// Then delegate to dapp
+					(Some(ref path), _) if self.endpoints.contains_key(&path.app_id) => {
+						self.endpoints.get(&path.app_id).unwrap().to_handler(path.clone())
+					},
+					// Redirection to main page
+					_ if *req.method() == hyper::method::Method::Get => {
+						Redirection::new(self.main_page)
+					},
+					// RPC by default
+					_ => {
+						self.special.get(&SpecialEndpoint::Rpc).unwrap().to_handler(EndpointPath::default())
+					}
+				}
+			}
+		};
+
+		// Delegate on_request to proper handler
+		self.handler.on_request(req)
+	}
+
+	/// This event occurs each time the `Request` is ready to be read from.
+	fn on_request_readable(&mut self, decoder: &mut Decoder<HttpStream>) -> Next {
+		self.handler.on_request_readable(decoder)
+	}
+
+	/// This event occurs after the first time this handled signals `Next::write()`.
+	fn on_response(&mut self, response: &mut server::Response) -> Next {
+		self.handler.on_response(response)
+	}
+
+	/// This event occurs each time the `Response` is ready to be written to.
+	fn on_response_writable(&mut self, encoder: &mut Encoder<HttpStream>) -> Next {
+		self.handler.on_response_writable(encoder)
+	}
+}
+
+impl<A: Authorization> Router<A> {
+	pub fn new(
+		main_page: &'static str,
+		endpoints: Arc<Endpoints>,
+		special: Arc<HashMap<SpecialEndpoint, Box<Endpoint>>>,
+		authorization: Arc<A>) -> Self {
+
+		let handler = special.get(&SpecialEndpoint::Rpc).unwrap().to_handler(EndpointPath::default());
+		Router {
+			main_page: main_page,
+			endpoints: endpoints,
+			special: special,
+			authorization: authorization,
+			handler: handler,
+		}
+	}
+}
+
+fn extract_url(req: &server::Request<HttpStream>) -> Option<Url> {
+	match *req.uri() {
+		uri::RequestUri::AbsoluteUri(ref url) => {
+			match Url::from_generic_url(url.clone()) {
+				Ok(url) => Some(url),
+				_ => None,
+			}
+		},
+		uri::RequestUri::AbsolutePath(ref path) => {
+			// Attempt to prepend the Host header (mandatory in HTTP/1.1)
+			let url_string = match req.headers().get::<header::Host>() {
+				Some(ref host) => {
+					format!("http://{}:{}{}", host.hostname, host.port.unwrap_or(80), path)
+				},
+				None => return None,
+			};
+
+			match Url::parse(&url_string) {
+				Ok(url) => Some(url),
+				_ => None,
+			}
+		},
+		_ => None,
+	}
+}
+
+fn extract_endpoint(url: &Option<Url>) -> (Option<EndpointPath>, SpecialEndpoint) {
+	fn special_endpoint(url: &Url) -> SpecialEndpoint {
+		if url.path.len() <= 1 {
+			return SpecialEndpoint::None;
+		}
+
+		match url.path[0].as_ref() {
+			apps::RPC_PATH => SpecialEndpoint::Rpc,
+			apps::API_PATH => SpecialEndpoint::Api,
+			apps::UTILS_PATH => SpecialEndpoint::Utils,
+			_ => SpecialEndpoint::None,
+		}
+	}
+
+	match *url {
+		Some(ref url) => match url.host {
+			Host::Domain(ref domain) if domain.ends_with(DAPPS_DOMAIN) => {
+				let len = domain.len() - DAPPS_DOMAIN.len();
+				let id = domain[0..len].to_owned();
+
+				(Some(EndpointPath {
+					app_id: id,
+					host: domain.clone(),
+					port: url.port,
+				}), special_endpoint(url))
+			},
+			_ if url.path.len() > 1 => {
+				let id = url.path[0].clone();
+				(Some(EndpointPath {
+					app_id: id.clone(),
+					host: format!("{}", url.host),
+					port: url.port,
+				}), special_endpoint(url))
+			},
+			_ => (None, special_endpoint(url)),
+		},
+		_ => (None, SpecialEndpoint::None)
+	}
+}
+
+#[test]
+fn should_extract_endpoint() {
+	assert_eq!(extract_endpoint(&None), (None, SpecialEndpoint::None));
+
+	// With path prefix
+	assert_eq!(
+		extract_endpoint(&Url::parse("http://localhost:8080/status/index.html").ok()),
+		(Some(EndpointPath {
+			app_id: "status".to_owned(),
+			host: "localhost".to_owned(),
+			port: 8080,
+		}), SpecialEndpoint::None)
+	);
+
+	// With path prefix
+	assert_eq!(
+		extract_endpoint(&Url::parse("http://localhost:8080/rpc/").ok()),
+		(Some(EndpointPath {
+			app_id: "rpc".to_owned(),
+			host: "localhost".to_owned(),
+			port: 8080,
+		}), SpecialEndpoint::Rpc)
+	);
+
+	assert_eq!(
+		extract_endpoint(&Url::parse("http://my.status.parity/parity-utils/inject.js").ok()),
+		(Some(EndpointPath {
+			app_id: "my.status".to_owned(),
+			host: "my.status.parity".to_owned(),
+			port: 80,
+		}), SpecialEndpoint::Utils)
+	);
+
+	// By Subdomain
+	assert_eq!(
+		extract_endpoint(&Url::parse("http://my.status.parity/test.html").ok()),
+		(Some(EndpointPath {
+			app_id: "my.status".to_owned(),
+			host: "my.status.parity".to_owned(),
+			port: 80,
+		}), SpecialEndpoint::None)
+	);
+
+	// RPC by subdomain
+	assert_eq!(
+		extract_endpoint(&Url::parse("http://my.status.parity/rpc/").ok()),
+		(Some(EndpointPath {
+			app_id: "my.status".to_owned(),
+			host: "my.status.parity".to_owned(),
+			port: 80,
+		}), SpecialEndpoint::Rpc)
+	);
+
+	// API by subdomain
+	assert_eq!(
+		extract_endpoint(&Url::parse("http://my.status.parity/api/").ok()),
+		(Some(EndpointPath {
+			app_id: "my.status".to_owned(),
+			host: "my.status.parity".to_owned(),
+			port: 80,
+		}), SpecialEndpoint::Api)
+	);
+}

dapps/src/router/redirect.rs

@@ -0,0 +1,55 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! HTTP Redirection hyper handler
+
+use hyper::{header, server, Decoder, Encoder, Next};
+use hyper::net::HttpStream;
+use hyper::status::StatusCode;
+
+pub struct Redirection {
+	to_url: &'static str
+}
+
+impl Redirection {
+	pub fn new(url: &'static str) -> Box<Self> {
+		Box::new(Redirection {
+			to_url: url
+		})
+	}
+}
+
+impl server::Handler<HttpStream> for Redirection {
+	fn on_request(&mut self, _request: server::Request<HttpStream>) -> Next {
+		Next::write()
+	}
+
+	fn on_request_readable(&mut self, _decoder: &mut Decoder<HttpStream>) -> Next {
+		Next::write()
+	}
+
+	fn on_response(&mut self, res: &mut server::Response) -> Next {
+		res.set_status(StatusCode::MovedPermanently);
+		res.headers_mut().set(header::Location(self.to_url.to_owned()));
+		Next::write()
+	}
+	fn on_response_writable(&mut self, _encoder: &mut Encoder<HttpStream>) -> Next {
+		Next::end()
+	}
+}
+
+
+

dapps/src/router/url.rs

@@ -0,0 +1,145 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! HTTP/HTTPS URL type. Based on URL type from Iron library.
+
+use url::Host;
+use url::{self};
+
+/// HTTP/HTTPS URL type for Iron.
+#[derive(PartialEq, Eq, Clone, Debug)]
+pub struct Url {
+	/// Raw url of url
+	pub raw: url::Url,
+
+	/// The host field of the URL, probably a domain.
+	pub host: Host,
+
+	/// The connection port.
+	pub port: u16,
+
+	/// The URL path, the resource to be accessed.
+	///
+	/// A *non-empty* vector encoding the parts of the URL path.
+	/// Empty entries of `""` correspond to trailing slashes.
+	pub path: Vec<String>,
+
+	/// The URL username field, from the userinfo section of the URL.
+	///
+	/// `None` if the `@` character was not part of the input OR
+	/// if a blank username was provided.
+	/// Otherwise, a non-empty string.
+	pub username: Option<String>,
+
+	/// The URL password field, from the userinfo section of the URL.
+	///
+	/// `None` if the `@` character was not part of the input OR
+	/// if a blank password was provided.
+	/// Otherwise, a non-empty string.
+	pub password: Option<String>,
+}
+
+impl Url {
+	/// Create a URL from a string.
+	///
+	/// The input must be a valid URL with a special scheme for this to succeed.
+	///
+	/// HTTP and HTTPS are special schemes.
+	///
+	/// See: http://url.spec.whatwg.org/#special-scheme
+	pub fn parse(input: &str) -> Result<Url, String> {
+		// Parse the string using rust-url, then convert.
+		match url::Url::parse(input) {
+			Ok(raw_url) => Url::from_generic_url(raw_url),
+			Err(e) => Err(format!("{}", e))
+		}
+	}
+
+	/// Create a `Url` from a `rust-url` `Url`.
+	pub fn from_generic_url(raw_url: url::Url) -> Result<Url, String> {
+		// Map empty usernames to None.
+		let username = match raw_url.username() {
+			"" => None,
+			username => Some(username.to_owned())
+		};
+
+		// Map empty passwords to None.
+		let password = match raw_url.password() {
+			Some(password) if !password.is_empty() => Some(password.to_owned()),
+			_ => None,
+		};
+
+		let port = try!(raw_url.port_or_known_default().ok_or_else(|| format!("Unknown port for scheme: `{}`", raw_url.scheme())));
+		let host = try!(raw_url.host().ok_or_else(|| "Valid host, because only data:, mailto: protocols does not have host.".to_owned())).to_owned();
+		let path = try!(raw_url.path_segments().ok_or_else(|| "Valid path segments. In HTTP we won't get cannot-be-a-base URLs".to_owned()))
+					.map(|part| part.to_owned()).collect();
+
+		Ok(Url {
+			port: port,
+			host: host,
+			path: path,
+			raw: raw_url,
+			username: username,
+			password: password,
+		})
+	}
+}
+
+#[cfg(test)]
+mod test {
+    use super::Url;
+
+    #[test]
+    fn test_default_port() {
+        assert_eq!(Url::parse("http://example.com/wow").unwrap().port, 80u16);
+        assert_eq!(Url::parse("https://example.com/wow").unwrap().port, 443u16);
+    }
+
+    #[test]
+    fn test_explicit_port() {
+        assert_eq!(Url::parse("http://localhost:3097").unwrap().port, 3097u16);
+    }
+
+    #[test]
+    fn test_empty_username() {
+        assert!(Url::parse("http://@example.com").unwrap().username.is_none());
+        assert!(Url::parse("http://:password@example.com").unwrap().username.is_none());
+    }
+
+    #[test]
+    fn test_not_empty_username() {
+        let user = Url::parse("http://john:pass@example.com").unwrap().username;
+        assert_eq!(user.unwrap(), "john");
+
+        let user = Url::parse("http://john:@example.com").unwrap().username;
+        assert_eq!(user.unwrap(), "john");
+    }
+
+    #[test]
+    fn test_empty_password() {
+        assert!(Url::parse("http://michael@example.com").unwrap().password.is_none());
+        assert!(Url::parse("http://:@example.com").unwrap().password.is_none());
+    }
+
+    #[test]
+    fn test_not_empty_password() {
+        let pass = Url::parse("http://michael:pass@example.com").unwrap().password;
+        assert_eq!(pass.unwrap(), "pass");
+
+        let pass = Url::parse("http://:pass@example.com").unwrap().password;
+        assert_eq!(pass.unwrap(), "pass");
+    }
+}

dapps/src/rpc.rs

@@ -0,0 +1,41 @@
+// 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/>.
+
+use std::sync::{Arc, Mutex};
+use jsonrpc_core::IoHandler;
+use jsonrpc_http_server::{ServerHandler, PanicHandler, AccessControlAllowOrigin};
+use endpoint::{Endpoint, EndpointPath, Handler};
+
+pub fn rpc(handler: Arc<IoHandler>, panic_handler: Arc<Mutex<Option<Box<Fn() -> () + Send>>>>) -> Box<Endpoint> {
+	Box::new(RpcEndpoint {
+		handler: handler,
+		panic_handler: panic_handler,
+		cors_domain: vec![AccessControlAllowOrigin::Null],
+	})
+}
+
+struct RpcEndpoint {
+	handler: Arc<IoHandler>,
+	panic_handler: Arc<Mutex<Option<Box<Fn() -> () + Send>>>>,
+	cors_domain: Vec<AccessControlAllowOrigin>,
+}
+
+impl Endpoint for RpcEndpoint {
+	fn to_handler(&self, _path: EndpointPath) -> Box<Handler> {
+		let panic_handler = PanicHandler { handler: self.panic_handler.clone() };
+		Box::new(ServerHandler::new(self.handler.clone(), self.cors_domain.clone(), panic_handler))
+	}
+}

db/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+description = "Ethcore Database"
+homepage = "http://ethcore.io"
+license = "GPL-3.0"
+name = "ethcore-db"
+version = "1.2.0"
+authors = ["Ethcore <admin@ethcore.io>"]
+build = "build.rs"
+
+[build-dependencies]
+syntex = "*"
+ethcore-ipc-codegen = { path = "../ipc/codegen" }
+
+[dependencies]
+clippy = { version = "0.0.77", optional = true}
+ethcore-devtools = { path = "../devtools" }
+ethcore-ipc = { path = "../ipc/rpc" }
+rocksdb = { git = "https://github.com/ethcore/rust-rocksdb" }
+semver = "0.2"
+ethcore-ipc-nano = { path = "../ipc/nano" }
+nanomsg = { git = "https://github.com/ethcore/nanomsg.rs.git" }
+crossbeam = "0.2"
+ethcore-util = { path = "../util" }
+
+[features]
+dev = ["clippy"]

db/build.rs

@@ -0,0 +1,43 @@
+// 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 syntex;
+extern crate ethcore_ipc_codegen as codegen;
+
+use std::env;
+use std::path::Path;
+
+pub fn main() {
+	let out_dir = env::var_os("OUT_DIR").unwrap();
+
+	// ipc pass
+	{
+		let src = Path::new("src/lib.rs.in");
+		let dst = Path::new(&out_dir).join("lib.intermediate.rs.in");
+		let mut registry = syntex::Registry::new();
+		codegen::register(&mut registry);
+		registry.expand("", &src, &dst).unwrap();
+	}
+
+	// binary serialization pass
+	{
+		let src = Path::new(&out_dir).join("lib.intermediate.rs.in");
+		let dst = Path::new(&out_dir).join("lib.rs");
+		let mut registry = syntex::Registry::new();
+		codegen::register(&mut registry);
+		registry.expand("", &src, &dst).unwrap();
+	}
+}

db/src/database.rs

@@ -0,0 +1,573 @@
+// 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/>.
+
+//! Ethcore rocksdb ipc service
+
+use traits::*;
+use rocksdb::{DB, Writable, WriteBatch, IteratorMode, DBIterator,
+IndexType, Options, DBCompactionStyle, BlockBasedOptions, Direction};
+use std::sync::{RwLock, Arc};
+use std::convert::From;
+use ipc::IpcConfig;
+use std::mem;
+use ipc::binary::BinaryConvertError;
+use std::collections::{VecDeque, HashMap, BTreeMap};
+
+impl From<String> for Error {
+	fn from(s: String) -> Error {
+		Error::RocksDb(s)
+	}
+}
+
+enum WriteCacheEntry {
+	Remove,
+	Write(Vec<u8>),
+}
+
+pub struct WriteCache {
+	entries: HashMap<Vec<u8>, WriteCacheEntry>,
+	preferred_len: usize,
+}
+
+const FLUSH_BATCH_SIZE: usize = 4096;
+
+impl WriteCache {
+	fn new(cache_len: usize) -> WriteCache {
+		WriteCache {
+			entries: HashMap::new(),
+			preferred_len: cache_len,
+		}
+	}
+
+	fn write(&mut self, key: Vec<u8>, val: Vec<u8>) {
+		self.entries.insert(key, WriteCacheEntry::Write(val));
+	}
+
+	fn remove(&mut self, key: Vec<u8>) {
+		self.entries.insert(key, WriteCacheEntry::Remove);
+	}
+
+	fn get(&self, key: &Vec<u8>) -> Option<Vec<u8>> {
+		self.entries.get(key).and_then(
+			|vec_ref| match vec_ref {
+				&WriteCacheEntry::Write(ref val) => Some(val.clone()),
+				&WriteCacheEntry::Remove => None
+			})
+	}
+
+	/// WriteCache should be locked for this
+	fn flush(&mut self, db: &DB, amount: usize) -> Result<(), Error> {
+		let batch = WriteBatch::new();
+		let mut removed_so_far = 0;
+		while removed_so_far < amount {
+			if self.entries.len() == 0 { break; }
+			let removed_key = {
+				let (key, cache_entry) = self.entries.iter().nth(0)
+				.expect("if entries.len == 0, we should have break in the loop, still we got here somehow");
+
+				match *cache_entry {
+					WriteCacheEntry::Write(ref val) => {
+						try!(batch.put(&key, val));
+					},
+					WriteCacheEntry::Remove => {
+						try!(batch.delete(&key));
+					},
+				}
+				key.clone()
+			};
+
+			self.entries.remove(&removed_key);
+
+			removed_so_far = removed_so_far + 1;
+		}
+		if removed_so_far > 0 {
+			try!(db.write(batch));
+		}
+		Ok(())
+	}
+
+	/// flushes until cache is empty
+	fn flush_all(&mut self, db: &DB) -> Result<(), Error> {
+		while !self.is_empty() { try!(self.flush(db, FLUSH_BATCH_SIZE)); }
+		Ok(())
+	}
+
+	fn is_empty(&self) -> bool {
+		self.entries.is_empty()
+	}
+
+	fn try_shrink(&mut self, db: &DB) -> Result<(), Error> {
+		if self.entries.len() > self.preferred_len {
+			try!(self.flush(db, FLUSH_BATCH_SIZE));
+		}
+		Ok(())
+	}
+}
+
+pub struct Database {
+	db: RwLock<Option<DB>>,
+	/// Iterators - dont't use between threads!
+	iterators: RwLock<BTreeMap<IteratorHandle, DBIterator>>,
+	write_cache: RwLock<WriteCache>,
+}
+
+unsafe impl Send for Database {}
+unsafe impl Sync for Database {}
+
+impl Database {
+	pub fn new() -> Database {
+		Database {
+			db: RwLock::new(None),
+			iterators: RwLock::new(BTreeMap::new()),
+			write_cache: RwLock::new(WriteCache::new(DEFAULT_CACHE_LEN)),
+		}
+	}
+
+	pub fn flush(&self) -> Result<(), Error> {
+		let mut cache_lock = self.write_cache.write().unwrap();
+		let db_lock = self.db.read().unwrap();
+		if db_lock.is_none() { return Ok(()); }
+		let db = db_lock.as_ref().unwrap();
+
+		try!(cache_lock.try_shrink(&db));
+		Ok(())
+	}
+
+	pub fn flush_all(&self) -> Result<(), Error> {
+		let mut cache_lock = self.write_cache.write().unwrap();
+		let db_lock = self.db.read().unwrap();
+		if db_lock.is_none() { return Ok(()); }
+		let db = db_lock.as_ref().expect("we should have exited with Ok(()) on the previous step");
+
+		try!(cache_lock.flush_all(&db));
+		Ok(())
+
+	}
+}
+
+impl Drop for Database {
+	fn drop(&mut self) {
+		self.flush().unwrap();
+	}
+}
+
+#[derive(Ipc)]
+impl DatabaseService for Database {
+	fn open(&self, config: DatabaseConfig, path: String) -> Result<(), Error> {
+		let mut db = self.db.write().unwrap();
+		if db.is_some() { return Err(Error::AlreadyOpen); }
+
+		let mut opts = Options::new();
+		opts.set_max_open_files(256);
+		opts.create_if_missing(true);
+		opts.set_use_fsync(false);
+		opts.set_compaction_style(DBCompactionStyle::DBUniversalCompaction);
+		if let Some(size) = config.prefix_size {
+			let mut block_opts = BlockBasedOptions::new();
+			block_opts.set_index_type(IndexType::HashSearch);
+			opts.set_block_based_table_factory(&block_opts);
+			opts.set_prefix_extractor_fixed_size(size);
+		}
+		*db = Some(try!(DB::open(&opts, &path)));
+
+		Ok(())
+	}
+
+	/// Opens database in the specified path with the default config
+	fn open_default(&self, path: String) -> Result<(), Error> {
+		self.open(DatabaseConfig::default(), path)
+	}
+
+	fn close(&self) -> Result<(), Error> {
+		try!(self.flush_all());
+
+		let mut db = self.db.write().unwrap();
+		if db.is_none() { return Err(Error::IsClosed); }
+
+		*db = None;
+		Ok(())
+	}
+
+	fn put(&self, key: &[u8], value: &[u8]) -> Result<(), Error> {
+		let mut cache_lock = self.write_cache.write().unwrap();
+		cache_lock.write(key.to_vec(), value.to_vec());
+		Ok(())
+	}
+
+	fn delete(&self, key: &[u8]) -> Result<(), Error> {
+		let mut cache_lock = self.write_cache.write().unwrap();
+		cache_lock.remove(key.to_vec());
+		Ok(())
+	}
+
+	fn write(&self, transaction: DBTransaction) -> Result<(), Error> {
+		let mut cache_lock = self.write_cache.write().unwrap();
+
+		let mut writes = transaction.writes.borrow_mut();
+		for kv in writes.drain(..) {
+			cache_lock.write(kv.key, kv.value);
+		}
+
+		let mut removes = transaction.removes.borrow_mut();
+		for k in removes.drain(..) {
+			cache_lock.remove(k);
+		}
+		Ok(())
+	}
+
+	fn get(&self, key: &[u8]) -> Result<Option<Vec<u8>>, Error> {
+		{
+			let key_vec = key.to_vec();
+			let cache_hit = self.write_cache.read().unwrap().get(&key_vec);
+
+			if cache_hit.is_some() {
+				return Ok(Some(cache_hit.expect("cache_hit.is_some() = true, still there is none somehow here")))
+			}
+		}
+		let db_lock = self.db.read().unwrap();
+		let db = try!(db_lock.as_ref().ok_or(Error::IsClosed));
+
+		match try!(db.get(key)) {
+			Some(db_vec) => {
+				Ok(Some(db_vec.to_vec()))
+			},
+			None => Ok(None),
+		}
+	}
+
+	fn get_by_prefix(&self, prefix: &[u8]) -> Result<Option<Vec<u8>>, Error> {
+		let db_lock = self.db.read().unwrap();
+		let db = try!(db_lock.as_ref().ok_or(Error::IsClosed));
+
+		let mut iter = db.iterator(IteratorMode::From(prefix, Direction::Forward));
+		match iter.next() {
+			// TODO: use prefix_same_as_start read option (not availabele in C API currently)
+			Some((k, v)) => if k[0 .. prefix.len()] == prefix[..] { Ok(Some(v.to_vec())) } else { Ok(None) },
+			_ => Ok(None)
+		}
+	}
+
+	fn is_empty(&self) -> Result<bool, Error> {
+		let db_lock = self.db.read().unwrap();
+		let db = try!(db_lock.as_ref().ok_or(Error::IsClosed));
+
+		Ok(db.iterator(IteratorMode::Start).next().is_none())
+	}
+
+	fn iter(&self) -> Result<IteratorHandle, Error> {
+		let db_lock = self.db.read().unwrap();
+		let db = try!(db_lock.as_ref().ok_or(Error::IsClosed));
+
+		let mut iterators = self.iterators.write().unwrap();
+		let next_iterator = iterators.keys().last().unwrap_or(&0) + 1;
+		iterators.insert(next_iterator, db.iterator(IteratorMode::Start));
+		Ok(next_iterator)
+	}
+
+	fn iter_next(&self, handle: IteratorHandle) -> Option<KeyValue>
+	{
+		let mut iterators = self.iterators.write().unwrap();
+		let mut iterator = match iterators.get_mut(&handle) {
+			Some(some_iterator) => some_iterator,
+			None => { return None; },
+		};
+
+		iterator.next().and_then(|(some_key, some_val)| {
+			Some(KeyValue {
+				key: some_key.to_vec(),
+				value: some_val.to_vec(),
+			})
+		})
+	}
+
+	fn dispose_iter(&self, handle: IteratorHandle) -> Result<(), Error> {
+		let mut iterators = self.iterators.write().unwrap();
+		iterators.remove(&handle);
+		Ok(())
+	}
+}
+
+// TODO : put proper at compile-time
+impl IpcConfig for Database {}
+
+/// Database iterator
+pub struct DatabaseIterator {
+	client: Arc<DatabaseClient<::nanomsg::Socket>>,
+	handle: IteratorHandle,
+}
+
+impl Iterator for DatabaseIterator {
+	type Item = (Vec<u8>, Vec<u8>);
+
+	fn next(&mut self) -> Option<Self::Item> {
+		self.client.iter_next(self.handle).and_then(|kv| Some((kv.key, kv.value)))
+	}
+}
+
+impl Drop for DatabaseIterator {
+	fn drop(&mut self) {
+		self.client.dispose_iter(self.handle).unwrap();
+	}
+}
+
+#[cfg(test)]
+mod test {
+
+	use super::Database;
+	use traits::*;
+	use devtools::*;
+
+	#[test]
+	fn can_be_created() {
+		let db = Database::new();
+		assert!(db.is_empty().is_err());
+	}
+
+	#[test]
+	fn can_be_open_empty() {
+		let db = Database::new();
+		let path = RandomTempPath::create_dir();
+		db.open_default(path.as_str().to_owned()).unwrap();
+
+		assert!(db.is_empty().is_ok());
+	}
+
+	#[test]
+	fn can_store_key() {
+		let db = Database::new();
+		let path = RandomTempPath::create_dir();
+		db.open_default(path.as_str().to_owned()).unwrap();
+
+		db.put("xxx".as_bytes(), "1".as_bytes()).unwrap();
+		db.flush_all().unwrap();
+		assert!(!db.is_empty().unwrap());
+	}
+
+	#[test]
+	fn can_retrieve() {
+		let db = Database::new();
+		let path = RandomTempPath::create_dir();
+		db.open_default(path.as_str().to_owned()).unwrap();
+		db.put("xxx".as_bytes(), "1".as_bytes()).unwrap();
+		db.close().unwrap();
+
+		db.open_default(path.as_str().to_owned()).unwrap();
+		assert_eq!(db.get("xxx".as_bytes()).unwrap().unwrap(), "1".as_bytes().to_vec());
+	}
+}
+
+#[cfg(test)]
+mod write_cache_tests {
+	use super::Database;
+	use traits::*;
+	use devtools::*;
+
+	#[test]
+	fn cache_write_flush() {
+		let db = Database::new();
+		let path = RandomTempPath::create_dir();
+
+		db.open_default(path.as_str().to_owned()).unwrap();
+		db.put("100500".as_bytes(), "1".as_bytes()).unwrap();
+		db.delete("100500".as_bytes()).unwrap();
+		db.flush_all().unwrap();
+
+		let val = db.get("100500".as_bytes()).unwrap();
+		assert!(val.is_none());
+	}
+
+}
+
+#[cfg(test)]
+mod client_tests {
+	use super::{DatabaseClient, Database};
+	use traits::*;
+	use devtools::*;
+	use nanoipc;
+	use std::sync::Arc;
+	use std::sync::atomic::{Ordering, AtomicBool};
+	use crossbeam;
+	use run_worker;
+
+	fn init_worker(addr: &str) -> nanoipc::Worker<Database> {
+		let mut worker = nanoipc::Worker::<Database>::new(&Arc::new(Database::new()));
+		worker.add_duplex(addr).unwrap();
+		worker
+	}
+
+	#[test]
+	fn can_call_handshake() {
+		let url = "ipc:///tmp/parity-db-ipc-test-10.ipc";
+		let worker_should_exit = Arc::new(AtomicBool::new(false));
+		let worker_is_ready = Arc::new(AtomicBool::new(false));
+		let c_worker_should_exit = worker_should_exit.clone();
+		let c_worker_is_ready = worker_is_ready.clone();
+
+		::std::thread::spawn(move || {
+			let mut worker = init_worker(url);
+			while !c_worker_should_exit.load(Ordering::Relaxed) {
+				worker.poll();
+				c_worker_is_ready.store(true, Ordering::Relaxed);
+			}
+		});
+
+		while !worker_is_ready.load(Ordering::Relaxed) { }
+		let client = nanoipc::init_duplex_client::<DatabaseClient<_>>(url).unwrap();
+
+		let hs = client.handshake();
+
+		worker_should_exit.store(true, Ordering::Relaxed);
+		assert!(hs.is_ok());
+	}
+
+	#[test]
+	fn can_open_db() {
+		let url = "ipc:///tmp/parity-db-ipc-test-20.ipc";
+		let path = RandomTempPath::create_dir();
+
+		let worker_should_exit = Arc::new(AtomicBool::new(false));
+		let worker_is_ready = Arc::new(AtomicBool::new(false));
+		let c_worker_should_exit = worker_should_exit.clone();
+		let c_worker_is_ready = worker_is_ready.clone();
+
+		::std::thread::spawn(move || {
+			let mut worker = init_worker(url);
+			while !c_worker_should_exit.load(Ordering::Relaxed) {
+				worker.poll();
+				c_worker_is_ready.store(true, Ordering::Relaxed);
+			}
+		});
+
+		while !worker_is_ready.load(Ordering::Relaxed) { }
+		let client = nanoipc::init_duplex_client::<DatabaseClient<_>>(url).unwrap();
+
+		client.open_default(path.as_str().to_owned()).unwrap();
+		assert!(client.is_empty().unwrap());
+		worker_should_exit.store(true, Ordering::Relaxed);
+	}
+
+	#[test]
+	fn can_put() {
+		let url = "ipc:///tmp/parity-db-ipc-test-30.ipc";
+		let path = RandomTempPath::create_dir();
+
+		crossbeam::scope(move |scope| {
+			let stop = Arc::new(AtomicBool::new(false));
+			run_worker(scope, stop.clone(), url);
+			let client = nanoipc::init_client::<DatabaseClient<_>>(url).unwrap();
+			client.open_default(path.as_str().to_owned()).unwrap();
+			client.put("xxx".as_bytes(), "1".as_bytes()).unwrap();
+			client.close().unwrap();
+
+			stop.store(true, Ordering::Relaxed);
+		});
+	}
+
+	#[test]
+	fn can_put_and_read() {
+		let url = "ipc:///tmp/parity-db-ipc-test-40.ipc";
+		let path = RandomTempPath::create_dir();
+
+		crossbeam::scope(move |scope| {
+			let stop = Arc::new(AtomicBool::new(false));
+			run_worker(scope, stop.clone(), url);
+			let client = nanoipc::init_client::<DatabaseClient<_>>(url).unwrap();
+
+			client.open_default(path.as_str().to_owned()).unwrap();
+			client.put("xxx".as_bytes(), "1".as_bytes()).unwrap();
+			client.close().unwrap();
+
+			client.open_default(path.as_str().to_owned()).unwrap();
+			assert_eq!(client.get("xxx".as_bytes()).unwrap().unwrap(), "1".as_bytes().to_vec());
+
+			stop.store(true, Ordering::Relaxed);
+		});
+	}
+
+	#[test]
+	fn can_read_empty() {
+		let url = "ipc:///tmp/parity-db-ipc-test-45.ipc";
+		let path = RandomTempPath::create_dir();
+
+		crossbeam::scope(move |scope| {
+			let stop = Arc::new(AtomicBool::new(false));
+			run_worker(scope, stop.clone(), url);
+			let client = nanoipc::init_client::<DatabaseClient<_>>(url).unwrap();
+
+			client.open_default(path.as_str().to_owned()).unwrap();
+			assert!(client.get("xxx".as_bytes()).unwrap().is_none());
+
+			stop.store(true, Ordering::Relaxed);
+		});
+	}
+
+
+	#[test]
+	fn can_commit_client_transaction() {
+		let url = "ipc:///tmp/parity-db-ipc-test-60.ipc";
+		let path = RandomTempPath::create_dir();
+
+		crossbeam::scope(move |scope| {
+			let stop = Arc::new(AtomicBool::new(false));
+			run_worker(scope, stop.clone(), url);
+			let client = nanoipc::init_client::<DatabaseClient<_>>(url).unwrap();
+			client.open_default(path.as_str().to_owned()).unwrap();
+
+			let transaction = DBTransaction::new();
+			transaction.put("xxx".as_bytes(), "1".as_bytes());
+			client.write(transaction).unwrap();
+
+			client.close().unwrap();
+
+			client.open_default(path.as_str().to_owned()).unwrap();
+			assert_eq!(client.get("xxx".as_bytes()).unwrap().unwrap(), "1".as_bytes().to_vec());
+
+			stop.store(true, Ordering::Relaxed);
+		});
+	}
+
+	#[test]
+	fn key_write_read_ipc() {
+		let url = "ipc:///tmp/parity-db-ipc-test-70.ipc";
+		let path = RandomTempPath::create_dir();
+
+		crossbeam::scope(|scope| {
+			let stop = StopGuard::new();
+			run_worker(&scope, stop.share(), url);
+
+			let client = nanoipc::init_client::<DatabaseClient<_>>(url).unwrap();
+
+			client.open_default(path.as_str().to_owned()).unwrap();
+			let mut batch = Vec::new();
+			for _ in 0..100 {
+				batch.push((random_str(256).as_bytes().to_vec(), random_str(256).as_bytes().to_vec()));
+				batch.push((random_str(256).as_bytes().to_vec(), random_str(2048).as_bytes().to_vec()));
+				batch.push((random_str(2048).as_bytes().to_vec(), random_str(2048).as_bytes().to_vec()));
+				batch.push((random_str(2048).as_bytes().to_vec(), random_str(256).as_bytes().to_vec()));
+			}
+
+			for &(ref k, ref v) in batch.iter() {
+				client.put(k, v).unwrap();
+			}
+			client.close().unwrap();
+
+			client.open_default(path.as_str().to_owned()).unwrap();
+			for &(ref k, ref v) in batch.iter() {
+				assert_eq!(v, &client.get(k).unwrap().unwrap());
+			}
+		});
+	}
+}

db/src/lib.rs

@@ -0,0 +1,20 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Database ipc service
+
+#![allow(dead_code, unused_assignments, unused_variables)] // codegen issues
+include!(concat!(env!("OUT_DIR"), "/lib.rs"));

db/src/lib.rs.in

@@ -0,0 +1,89 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+extern crate ethcore_ipc as ipc;
+extern crate rocksdb;
+extern crate ethcore_devtools as devtools;
+extern crate semver;
+extern crate ethcore_ipc_nano as nanoipc;
+extern crate nanomsg;
+extern crate crossbeam;
+extern crate ethcore_util as util;
+
+pub mod database;
+pub mod traits;
+
+pub use traits::{DatabaseService, DBTransaction, Error};
+pub use database::{Database, DatabaseClient, DatabaseIterator};
+
+use std::sync::Arc;
+use std::sync::atomic::*;
+use std::path::PathBuf;
+
+pub type DatabaseNanoClient = DatabaseClient<::nanomsg::Socket>;
+pub type DatabaseConnection = nanoipc::GuardedSocket<DatabaseNanoClient>;
+
+#[derive(Debug)]
+pub enum ServiceError {
+	Io(std::io::Error),
+	Socket(nanoipc::SocketError),
+}
+
+impl std::convert::From<std::io::Error> for ServiceError {
+	fn from(io_error: std::io::Error) -> ServiceError { ServiceError::Io(io_error) }
+}
+
+impl std::convert::From<nanoipc::SocketError> for ServiceError {
+	fn from(socket_error: nanoipc::SocketError) -> ServiceError { ServiceError::Socket(socket_error) }
+}
+
+pub fn blocks_service_url(db_path: &str) -> Result<String, std::io::Error> {
+	let mut path = PathBuf::from(db_path);
+	try!(::std::fs::create_dir_all(db_path));
+	path.push("blocks.ipc");
+	Ok(format!("ipc://{}", path.to_str().unwrap()))
+}
+
+pub fn extras_service_url(db_path: &str) -> Result<String, ::std::io::Error> {
+	let mut path = PathBuf::from(db_path);
+	try!(::std::fs::create_dir_all(db_path));
+	path.push("extras.ipc");
+	Ok(format!("ipc://{}", path.to_str().unwrap()))
+}
+
+pub fn blocks_client(db_path: &str) -> Result<DatabaseConnection, ServiceError> {
+	let url = try!(blocks_service_url(db_path));
+	let client = try!(nanoipc::init_client::<DatabaseClient<_>>(&url));
+	Ok(client)
+}
+
+pub fn extras_client(db_path: &str) -> Result<DatabaseConnection, ServiceError> {
+	let url = try!(extras_service_url(db_path));
+	let client = try!(nanoipc::init_client::<DatabaseClient<_>>(&url));
+	Ok(client)
+}
+
+// for tests
+pub fn run_worker(scope: &crossbeam::Scope, stop: Arc<AtomicBool>, socket_path: &str) {
+	let socket_path = socket_path.to_owned();
+	scope.spawn(move || {
+		let mut worker = nanoipc::Worker::new(&Arc::new(Database::new()));
+		worker.add_reqrep(&socket_path).unwrap();
+		while !stop.load(Ordering::Relaxed) {
+			worker.poll();
+		}
+	});
+}

db/src/traits.rs

@@ -0,0 +1,132 @@
+// 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/>.
+
+//! Ethcore database trait
+
+use std::mem;
+use ipc::binary::BinaryConvertError;
+use std::collections::VecDeque;
+use std::cell::RefCell;
+
+pub type IteratorHandle = u32;
+
+pub const DEFAULT_CACHE_LEN: usize = 12288;
+
+#[derive(Binary)]
+pub struct KeyValue {
+	pub key: Vec<u8>,
+	pub value: Vec<u8>,
+}
+
+	#[derive(Debug, Binary)]
+	pub enum Error {
+	AlreadyOpen,
+	IsClosed,
+	RocksDb(String),
+	TransactionUnknown,
+	IteratorUnknown,
+	UncommitedTransactions,
+}
+
+/// Database configuration
+#[derive(Binary)]
+pub struct DatabaseConfig {
+	/// Optional prefix size in bytes. Allows lookup by partial key.
+	pub prefix_size: Option<usize>,
+	/// write cache length
+	pub cache: usize,
+}
+
+impl Default for DatabaseConfig {
+	fn default() -> DatabaseConfig {
+		DatabaseConfig {
+			prefix_size: None,
+			cache: DEFAULT_CACHE_LEN,
+		}
+	}
+}
+
+impl DatabaseConfig {
+	fn with_prefix(prefix: usize) -> DatabaseConfig {
+		DatabaseConfig {
+			prefix_size: Some(prefix),
+			cache: DEFAULT_CACHE_LEN,
+		}
+	}
+}
+
+	pub trait DatabaseService : Sized {
+	/// Opens database in the specified path
+	fn open(&self, config: DatabaseConfig, path: String) -> Result<(), Error>;
+
+	/// Opens database in the specified path with the default config
+	fn open_default(&self, path: String) -> Result<(), Error>;
+
+	/// Closes database
+	fn close(&self) -> Result<(), Error>;
+
+	/// Insert a key-value pair in the transaction. Any existing value value will be overwritten.
+	fn put(&self, key: &[u8], value: &[u8]) -> Result<(), Error>;
+
+	/// Delete value by key.
+	fn delete(&self, key: &[u8]) -> Result<(), Error>;
+
+	/// Get value by key.
+	fn get(&self, key: &[u8]) -> Result<Option<Vec<u8>>, Error>;
+
+	/// Get value by partial key. Prefix size should match configured prefix size.
+	fn get_by_prefix(&self, prefix: &[u8]) -> Result<Option<Vec<u8>>, Error>;
+
+	/// Check if there is anything in the database.
+	fn is_empty(&self) -> Result<bool, Error>;
+
+	/// Get handle to iterate through keys
+	fn iter(&self) -> Result<IteratorHandle, Error>;
+
+	/// Next key-value for the the given iterator
+	fn iter_next(&self, iterator: IteratorHandle) -> Option<KeyValue>;
+
+	/// Dispose iteration that is no longer needed
+	fn dispose_iter(&self, handle: IteratorHandle) -> Result<(), Error>;
+
+	/// Write client transaction
+	fn write(&self, transaction: DBTransaction) -> Result<(), Error>;
+}
+
+#[derive(Binary)]
+pub struct DBTransaction {
+	pub writes: RefCell<Vec<KeyValue>>,
+	pub removes: RefCell<Vec<Vec<u8>>>,
+}
+
+impl DBTransaction {
+	pub fn new() -> DBTransaction {
+		DBTransaction {
+			writes: RefCell::new(Vec::new()),
+			removes: RefCell::new(Vec::new()),
+		}
+	}
+
+	pub fn put(&self, key: &[u8], value: &[u8]) {
+		let mut brw = self.writes.borrow_mut();
+		brw.push(KeyValue { key: key.to_vec(), value: value.to_vec() });
+	}
+
+	pub fn delete(&self, key: &[u8]) {
+		let mut brw = self.removes.borrow_mut();
+		brw.push(key.to_vec());
+	}
+}

devtools/Cargo.toml

@@ -3,7 +3,7 @@ description = "Ethcore development/test/build tools"
 homepage = "http://ethcore.io"
 license = "GPL-3.0"
 name = "ethcore-devtools"
-version = "1.1.0"
+version = "1.2.0"
 authors = ["Ethcore <admin@ethcore.io>"]
 
 [dependencies]

devtools/README.md

@@ -1 +0,0 @@
-# ethcore dev tools

devtools/src/lib.rs

@@ -20,5 +20,9 @@
 extern crate rand;
 
 pub mod random_path;
+pub mod test_socket;
+pub mod stop_guard;
 
 pub use random_path::*;
+pub use test_socket::*;
+pub use stop_guard::*;

devtools/src/random_path.rs

@@ -26,7 +26,11 @@ pub struct RandomTempPath {
 }
 
 pub fn random_filename() -> String {
-	(0..8).map(|_| ((random::<f32>() * 26.0) as u8 + 97) as char).collect()
+	random_str(8)
+}
+
+pub fn random_str(len: usize) -> String {
+	(0..len).map(|_| ((random::<f32>() * 26.0) as u8 + 97) as char).collect()
 }
 
 impl RandomTempPath {
@@ -54,12 +58,18 @@ impl RandomTempPath {
 	pub fn as_str(&self) -> &str {
 		self.path.to_str().unwrap()
 	}
+
+	pub fn new_in(&self, name: &str) -> String {
+		let mut path = self.path.clone();
+		path.push(name);
+		path.to_str().unwrap().to_owned()
+	}
 }
 
 impl Drop for RandomTempPath {
 	fn drop(&mut self) {
 		if let Err(e) = fs::remove_dir_all(self.as_path()) {
-			panic!("failed to remove temp directory, probably something failed to destroyed ({})", e);
+			panic!("Failed to remove temp directory. Here's what prevented this from happening:  ({})", e);
 		}
 	}
 }

devtools/src/stop_guard.rs

@@ -0,0 +1,45 @@
+// 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/>.
+
+//! Stop guard mod
+
+use std::sync::Arc;
+use std::sync::atomic::*;
+
+/// Stop guard that will set a stop flag on drop
+pub struct StopGuard {
+	flag: Arc<AtomicBool>,
+}
+
+impl StopGuard {
+	/// Create a stop guard
+	pub fn new() -> StopGuard {
+		StopGuard {
+			flag: Arc::new(AtomicBool::new(false))
+		}
+	}
+
+	/// Share stop guard between the threads
+	pub fn share(&self) -> Arc<AtomicBool> {
+		self.flag.clone()
+	}
+}
+
+impl Drop for StopGuard {
+	fn drop(&mut self) {
+		self.flag.store(true, Ordering::Relaxed)
+	}
+}

devtools/src/test_socket.rs

@@ -0,0 +1,94 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+use std::io::*;
+use std::cmp;
+
+pub struct TestSocket {
+	pub read_buffer: Vec<u8>,
+	pub write_buffer: Vec<u8>,
+	pub cursor: usize,
+	pub buf_size: usize,
+}
+
+impl Default for TestSocket {
+	fn default() -> Self {
+		TestSocket::new()
+	}
+}
+
+impl TestSocket {
+	pub fn new() -> Self {
+		TestSocket {
+			read_buffer: vec![],
+			write_buffer: vec![],
+			cursor: 0,
+			buf_size: 0,
+		}
+	}
+
+	pub fn new_buf(buf_size: usize) -> TestSocket {
+		TestSocket {
+			read_buffer: vec![],
+			write_buffer: vec![],
+			cursor: 0,
+			buf_size: buf_size,
+		}
+	}
+
+	pub fn new_ready(data: Vec<u8>) -> TestSocket {
+		TestSocket {
+			read_buffer: data,
+			write_buffer: vec![],
+			cursor: 0,
+			buf_size: 0,
+		}
+	}
+}
+
+impl Read for TestSocket {
+	fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
+		let end_position = cmp::min(self.read_buffer.len(), self.cursor+buf.len());
+		let len = cmp::max(end_position - self.cursor, 0);
+		match len {
+			0 => Ok(0),
+			_ => {
+				for i in self.cursor..end_position {
+					buf[i-self.cursor] = self.read_buffer[i];
+				}
+				self.cursor = self.cursor + buf.len();
+				Ok(len)
+			}
+		}
+	}
+}
+
+impl Write for TestSocket {
+	fn write(&mut self, buf: &[u8]) -> Result<usize> {
+		if self.buf_size == 0 || buf.len() < self.buf_size {
+			self.write_buffer.extend(buf.iter().cloned());
+			Ok(buf.len())
+		}
+		else {
+			self.write_buffer.extend(buf.iter().take(self.buf_size).cloned());
+			Ok(self.buf_size)
+		}
+	}
+
+	fn flush(&mut self) -> Result<()> {
+		unimplemented!();
+	}
+}

doc.sh

@@ -2,10 +2,13 @@
 # generate documentation only for partiy and ethcore libraries
 
 cargo doc --no-deps --verbose \
+	-p ethkey \
+	-p ethstore \
 	-p ethash \
 	-p ethcore-util \
 	-p ethcore \
 	-p ethsync \
 	-p ethcore-rpc \
+	-p ethcore-signer \
+	-p ethcore-dapps \
 	-p parity \
-	-p ethminer

docker/centos/Dockerfile

@@ -0,0 +1,29 @@
+FROM centos:latest
+WORKDIR /build
+# install tools and dependencies
+RUN yum -y update&& \
+    yum install -y git make gcc-c++ gcc file binutils
+# install rustup
+RUN curl -sSf https://static.rust-lang.org/rustup.sh -o rustup.sh &&\
+ls&&\ 
+ sh rustup.sh -s -- --disable-sudo
+# show backtraces
+ENV RUST_BACKTRACE 1
+# set compiler
+ENV CXX g++
+ENV CC gcc
+# show tools
+RUN rustc -vV && \
+cargo -V && \
+gcc -v &&\
+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 &&	\
+	strip /build/parity/target/release/parity
+RUN file /build/parity/target/release/parity

docker/ubuntu-aarch64/Dockerfile

@@ -0,0 +1,49 @@
+FROM ubuntu:14.04
+WORKDIR /build
+# install tools and dependencies
+RUN apt-get -y update && \
+        apt-get install -y --force-yes --no-install-recommends \
+        curl git make g++ gcc-aarch64-linux-gnu g++-aarch64-linux-gnu \
+        libc6-arm64-cross libc6-dev-arm64-cross wget file ca-certificates \
+        binutils-aarch64-linux-gnu \
+        && \
+    apt-get clean
+
+# install rustup
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
+
+# rustup directory
+ENV PATH /root/.cargo/bin:$PATH
+
+ENV RUST_TARGETS="aarch64-unknown-linux-gnu"
+
+# multirust add arm--linux-gnuabhf toolchain
+RUN rustup target add aarch64-unknown-linux-gnu
+
+# show backtraces
+ENV RUST_BACKTRACE 1
+
+# set compilers
+ENV CXX aarch64-linux-gnu-g++
+ENV CC aarch64-linux-gnu-gcc
+
+# show tools
+ RUN rustc -vV && \
+ cargo -V && \
+ gcc -v &&\
+ g++ -v
+
+# 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'\
+        >>.cargo/config && \
+        cat .cargo/config && \
+        cargo build --target aarch64-unknown-linux-gnu --release --verbose && \
+        ls /build/parity/target/aarch64-unknown-linux-gnu/release/parity &&     \
+        /usr/bin/aarch64-linux-gnu-strip /build/parity/target/aarch64-unknown-linux-gnu/release/parity
+RUN file /build/parity/target/aarch64-unknown-linux-gnu/release/parity

docker/ubuntu-arm/Dockerfile

@@ -0,0 +1,49 @@
+FROM ubuntu:14.04
+WORKDIR /build
+# install tools and dependencies
+RUN apt-get -y update && \
+        apt-get install -y --force-yes --no-install-recommends \
+        curl git make g++ gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf \
+        libc6-dev-armhf-cross wget file ca-certificates \
+        binutils-arm-linux-gnueabihf \
+        && \
+    apt-get clean
+
+# install rustup
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
+
+# rustup directory
+ENV PATH /root/.cargo/bin:$PATH
+
+ENV RUST_TARGETS="arm-unknown-linux-gnueabihf"
+
+# multirust add arm--linux-gnuabhf toolchain
+RUN rustup target add armv7-unknown-linux-gnueabihf
+
+# show backtraces
+ENV RUST_BACKTRACE 1
+
+# set compilers
+ENV CXX arm-linux-gnueabihf-g++
+ENV CC arm-linux-gnueabihf-gcc
+
+# show tools
+ RUN rustc -vV && \
+ cargo -V && \
+ gcc -v &&\
+ g++ -v
+
+# 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'\
+        >>.cargo/config && \
+        cat .cargo/config && \
+        cargo build --target armv7-unknown-linux-gnueabihf --release --verbose && \
+        ls /build/parity/target/armv7-unknown-linux-gnueabihf/release/parity && \
+        /usr/bin/arm-linux-gnueabihf-strip /build/parity/target/armv7-unknown-linux-gnueabihf/release/parity
+RUN file /build/parity/target/armv7-unknown-linux-gnueabihf/release/parity

docker/ubuntu-dev/Dockerfile

@@ -27,11 +27,11 @@ RUN git clone https://github.com/debris/evmjit && \
 	mkdir build && cd build && \
 	cmake .. && make && make install && cd
 
-# install multirust
-RUN curl -sf https://raw.githubusercontent.com/brson/multirust/master/blastoff.sh | sh -s -- --yes
+# install rustup
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
 
-# export rust LIBRARY_PATH
-ENV LIBRARY_PATH /usr/local/lib
+# rustup directory
+ENV PATH /root/.cargo/bin:$PATH
 
 # show backtraces
 ENV RUST_BACKTRACE 1

docker/ubuntu-jit/Dockerfile

@@ -1,42 +1,55 @@
 FROM ubuntu:14.04
-
+WORKDIR /build
 # install tools and dependencies
 RUN apt-get update && \
-	apt-get install -y \
-	# make
-	build-essential \
-	# add-apt-repository
-	software-properties-common \
-	curl \
-	wget \
-	git \
-	g++ \
-	# evmjit dependencies
-	zlib1g-dev \
-	libedit-dev
+        apt-get install -y \
+        # make
+        build-essential \
+        # add-apt-repository
+        software-properties-common \
+        curl \
+        wget \
+        git \
+        g++ \
+        binutils \
+        file \
+        # evmjit dependencies
+        zlib1g-dev \
+        libedit-dev
 
-# cmake, llvm and rocksdb ppas. then update ppas
+# cmake and llvm ppas. then update ppas
 RUN add-apt-repository -y "ppa:george-edison55/cmake-3.x" && \
-	add-apt-repository "deb http://llvm.org/apt/trusty/ llvm-toolchain-trusty-3.7 main" && \
-	apt-get update && \
-	apt-get install -y --force-yes cmake llvm-3.7-dev
+        add-apt-repository "deb http://llvm.org/apt/trusty/ llvm-toolchain-trusty-3.7 main" && \
+        apt-get update && \
+        apt-get install -y --force-yes cmake llvm-3.7-dev
 
 # install evmjit
 RUN git clone https://github.com/debris/evmjit && \
-	cd evmjit && \
-	mkdir build && cd build && \
-	cmake .. && make && make install && cd
+        cd evmjit && \
+        mkdir build && cd build && \
+        cmake .. && make && make install && cd
 
-# install multirust
-RUN curl -sf https://raw.githubusercontent.com/brson/multirust/master/blastoff.sh | sh -s -- --yes
+# install rustup
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
 
-# export rust LIBRARY_PATH
-ENV LIBRARY_PATH /usr/local/lib
+# rustup directory
+ENV PATH /root/.cargo/bin:$PATH
 
 # show backtraces
 ENV RUST_BACKTRACE 1
 
+# show tools
+RUN rustc -vV && \
+cargo -V && \
+gcc -v &&\
+g++ -v
+
 # build parity
 RUN git clone https://github.com/ethcore/parity && \
-	cd parity && \
-	cargo build --release --features ethcore/jit
+        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
+RUN file /build/parity/target/release/parity

docker/ubuntu/Dockerfile

@@ -1,23 +1,35 @@
 FROM ubuntu:14.04
-
+WORKDIR /build
 # install tools and dependencies
 RUN apt-get update && \
-	apt-get install -y \
-	g++ \
-	curl \
-	git \
-	make
+        apt-get install -y \
+        g++ \
+        curl \
+        git \
+        file \
+        binutils
 
-# install multirust
-RUN curl -sf https://raw.githubusercontent.com/brson/multirust/master/blastoff.sh | sh -s -- --yes
+# install rustup
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
 
-# export rust LIBRARY_PATH
-ENV LIBRARY_PATH /usr/local/lib
+# rustup directory
+ENV PATH /root/.cargo/bin:$PATH
 
 # show backtraces
 ENV RUST_BACKTRACE 1
 
+# show tools
+RUN rustc -vV && \
+cargo -V && \
+gcc -v &&\
+g++ -v
+
 # build parity
 RUN git clone https://github.com/ethcore/parity && \
-	cd parity && \
-	cargo build --release
+        cd parity && \
+        git checkout beta && \
+        git pull && \
+        cargo build --release --verbose && \
+        ls /build/parity/target/release/parity && \
+        strip /build/parity/target/release/parity
+RUN file /build/parity/target/release/parity

ethash/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ethash"
-version = "1.1.0"
+version = "1.2.0"
 authors = ["arkpar <arkadiy@ethcore.io"]
 
 [lib]

ethash/src/compute.rs

@@ -20,12 +20,14 @@
 // TODO: fix endianess for big endian
 
 use primal::is_prime;
+use std::cell::Cell;
+use std::sync::Mutex;
 use std::mem;
 use std::ptr;
 use sha3;
 use std::slice;
 use std::path::PathBuf;
-use std::io::{Read, Write, self};
+use std::io::{self, Read, Write};
 use std::fs::{self, File};
 
 pub const ETHASH_EPOCH_LENGTH: u64 = 30000;
@@ -42,14 +44,14 @@ const NODE_WORDS: usize = 64 / 4;
 const NODE_BYTES: usize = 64;
 const MIX_WORDS: usize = ETHASH_MIX_BYTES / 4;
 const MIX_NODES: usize = MIX_WORDS / NODE_WORDS;
-const FNV_PRIME: u32 =  0x01000193;
+const FNV_PRIME: u32 = 0x01000193;
 
 /// Computation result
 pub struct ProofOfWork {
 	/// Difficulty boundary
 	pub value: H256,
 	/// Mix
-	pub mix_hash: H256
+	pub mix_hash: H256,
 }
 
 struct Node {
@@ -85,6 +87,7 @@ pub type H256 = [u8; 32];
 pub struct Light {
 	block_number: u64,
 	cache: Vec<Node>,
+	seed_compute: Mutex<SeedHashCompute>,
 }
 
 /// Light cache structur
@@ -101,17 +104,17 @@ impl Light {
 		light_compute(self, header_hash, nonce)
 	}
 
-	pub fn file_path(block_number: u64) -> PathBuf {
+	pub fn file_path(seed_hash: H256) -> PathBuf {
 		let mut home = ::std::env::home_dir().unwrap();
 		home.push(".ethash");
 		home.push("light");
-		let seed_hash = get_seedhash(block_number);
 		home.push(to_hex(&seed_hash));
 		home
 	}
 
 	pub fn from_file(block_number: u64) -> io::Result<Light> {
-		let path = Light::file_path(block_number);
+		let seed_compute = SeedHashCompute::new();
+		let path = Light::file_path(seed_compute.get_seedhash(block_number));
 		let mut file = try!(File::open(path));
 
 		let cache_size = get_cache_size(block_number);
@@ -126,11 +129,13 @@ impl Light {
 		Ok(Light {
 			cache: nodes,
 			block_number: block_number,
+			seed_compute: Mutex::new(seed_compute),
 		})
 	}
 
 	pub fn to_file(&self) -> io::Result<()> {
-		let path = Light::file_path(self.block_number);
+		let seed_compute = self.seed_compute.lock().unwrap();
+		let path = Light::file_path(seed_compute.get_seedhash(self.block_number));
 		try!(fs::create_dir_all(path.parent().unwrap()));
 		let mut file = try!(File::create(path));
 
@@ -141,6 +146,51 @@ impl Light {
 	}
 }
 
+pub struct SeedHashCompute {
+	prev_epoch: Cell<u64>,
+	prev_seedhash: Cell<H256>,
+}
+
+impl SeedHashCompute {
+	#[inline]
+	pub fn new() -> SeedHashCompute {
+		SeedHashCompute {
+			prev_epoch: Cell::new(0),
+			prev_seedhash: Cell::new([0u8; 32]),
+		}
+	}
+
+	#[inline]
+	fn reset_cache(&self) {
+		self.prev_epoch.set(0);
+		self.prev_seedhash.set([0u8; 32]);
+	}
+
+	#[inline]
+	pub fn get_seedhash(&self, block_number: u64) -> H256 {
+		let epoch = block_number / ETHASH_EPOCH_LENGTH;
+		if epoch < self.prev_epoch.get() {
+			// can't build on previous hash if requesting an older block
+			self.reset_cache();
+		}
+		if epoch > self.prev_epoch.get() {
+			let seed_hash = SeedHashCompute::resume_compute_seedhash(self.prev_seedhash.get(), self.prev_epoch.get(), epoch);
+			self.prev_seedhash.set(seed_hash);
+			self.prev_epoch.set(epoch);
+		}
+		self.prev_seedhash.get()
+	}
+
+	#[inline]
+	pub fn resume_compute_seedhash(mut hash: H256, start_epoch: u64, end_epoch: u64) -> H256 {
+		for _ in start_epoch..end_epoch {
+			unsafe { sha3::sha3_256(hash[..].as_mut_ptr(), 32, hash[..].as_ptr(), 32) };
+		}
+		hash
+	}
+}
+
+
 #[inline]
 fn fnv_hash(x: u32, y: u32) -> u32 {
 	return x.wrapping_mul(FNV_PRIME) ^ y;
@@ -153,34 +203,24 @@ fn sha3_512(input: &[u8], output: &mut [u8]) {
 
 #[inline]
 fn get_cache_size(block_number: u64) -> usize {
-    let mut sz: u64 = CACHE_BYTES_INIT + CACHE_BYTES_GROWTH * (block_number / ETHASH_EPOCH_LENGTH);
-    sz = sz - NODE_BYTES as u64;
-    while !is_prime(sz / NODE_BYTES as u64) {
-        sz = sz - 2 * NODE_BYTES as u64;
-    }
-    sz as usize
+	let mut sz: u64 = CACHE_BYTES_INIT + CACHE_BYTES_GROWTH * (block_number / ETHASH_EPOCH_LENGTH);
+	sz = sz - NODE_BYTES as u64;
+	while !is_prime(sz / NODE_BYTES as u64) {
+		sz = sz - 2 * NODE_BYTES as u64;
+	}
+	sz as usize
 }
 
 #[inline]
 fn get_data_size(block_number: u64) -> usize {
-    let mut sz: u64 = DATASET_BYTES_INIT + DATASET_BYTES_GROWTH * (block_number / ETHASH_EPOCH_LENGTH);
-    sz = sz - ETHASH_MIX_BYTES as u64;
-    while !is_prime(sz / ETHASH_MIX_BYTES as u64) {
-        sz = sz - 2 * ETHASH_MIX_BYTES as u64;
-    }
-    sz as usize
+	let mut sz: u64 = DATASET_BYTES_INIT + DATASET_BYTES_GROWTH * (block_number / ETHASH_EPOCH_LENGTH);
+	sz = sz - ETHASH_MIX_BYTES as u64;
+	while !is_prime(sz / ETHASH_MIX_BYTES as u64) {
+		sz = sz - 2 * ETHASH_MIX_BYTES as u64;
+	}
+	sz as usize
 }
 
-#[inline]
-/// Given the `block_number`, determine the seed hash for Ethash.
-pub fn get_seedhash(block_number: u64) -> H256 {
-	let epochs = block_number / ETHASH_EPOCH_LENGTH;
-	let mut ret: H256 = [0u8; 32];
-	for _ in 0..epochs {
-		unsafe { sha3::sha3_256(ret[..].as_mut_ptr(), 32, ret[..].as_ptr(), 32) };
-	}
-	ret
-}
 
 /// Difficulty quick check for POW preverification
 ///
@@ -211,12 +251,12 @@ pub fn light_compute(light: &Light, header_hash: &H256, nonce: u64) -> ProofOfWo
 	hash_compute(light, full_size, header_hash, nonce)
 }
 
-fn hash_compute(light: &Light, full_size: usize,  header_hash: &H256, nonce: u64) -> ProofOfWork {
+fn hash_compute(light: &Light, full_size: usize, header_hash: &H256, nonce: u64) -> ProofOfWork {
 	if full_size % MIX_WORDS != 0 {
 		panic!("Unaligned full size");
 	}
 	// pack hash and nonce together into first 40 bytes of s_mix
-	let mut s_mix: [Node; MIX_NODES + 1] = [ Node::default(), Node::default(), Node::default() ];
+	let mut s_mix: [Node; MIX_NODES + 1] = [Node::default(), Node::default(), Node::default()];
 	unsafe { ptr::copy_nonoverlapping(header_hash.as_ptr(), s_mix.get_unchecked_mut(0).bytes.as_mut_ptr(), 32) };
 	unsafe { ptr::copy_nonoverlapping(mem::transmute(&nonce), s_mix.get_unchecked_mut(0).bytes[32..].as_mut_ptr(), 8) };
 
@@ -257,7 +297,7 @@ fn hash_compute(light: &Light, full_size: usize,  header_hash: &H256, nonce: u64
 		ptr::copy_nonoverlapping(mix.get_unchecked_mut(0).bytes.as_ptr(), buf[64..].as_mut_ptr(), 32);
 		ptr::copy_nonoverlapping(mix.get_unchecked_mut(0).bytes.as_ptr(), mix_hash.as_mut_ptr(), 32);
 		let mut value: H256 = [0u8; 32];
-		sha3::sha3_256(value.as_mut_ptr(), value.len(),  buf.as_ptr(), buf.len());
+		sha3::sha3_256(value.as_mut_ptr(), value.len(), buf.as_ptr(), buf.len());
 		ProofOfWork {
 			mix_hash: mix_hash,
 			value: value,
@@ -287,7 +327,9 @@ fn calculate_dag_item(node_index: u32, light: &Light) -> Node {
 }
 
 fn light_new(block_number: u64) -> Light {
-	let seedhash = get_seedhash(block_number);
+
+	let seed_compute = SeedHashCompute::new();
+	let seedhash = seed_compute.get_seedhash(block_number);
 	let cache_size = get_cache_size(block_number);
 
 	if cache_size % NODE_BYTES != 0 {
@@ -308,7 +350,7 @@ fn light_new(block_number: u64) -> Light {
 				let idx = *nodes.get_unchecked_mut(i).as_words().get_unchecked(0) as usize % num_nodes;
 				let mut data = nodes.get_unchecked((num_nodes - 1 + i) % num_nodes).clone();
 				for w in 0..NODE_WORDS {
-					*data.as_words_mut().get_unchecked_mut(w) ^= *nodes.get_unchecked(idx).as_words().get_unchecked(w) ;
+					*data.as_words_mut().get_unchecked_mut(w) ^= *nodes.get_unchecked(idx).as_words().get_unchecked(w);
 				}
 				sha3_512(&data.bytes, &mut nodes.get_unchecked_mut(i).bytes);
 			}
@@ -318,10 +360,11 @@ fn light_new(block_number: u64) -> Light {
 	Light {
 		cache: nodes,
 		block_number: block_number,
+		seed_compute: Mutex::new(seed_compute),
 	}
 }
 
-static CHARS: &'static[u8] = b"0123456789abcdef";
+static CHARS: &'static [u8] = b"0123456789abcdef";
 fn to_hex(bytes: &[u8]) -> String {
 	let mut v = Vec::with_capacity(bytes.len() * 2);
 	for &byte in bytes.iter() {
@@ -329,9 +372,7 @@ fn to_hex(bytes: &[u8]) -> String {
 		v.push(CHARS[(byte & 0xf) as usize]);
 	}
 
-	unsafe {
-		String::from_utf8_unchecked(v)
-	}
+	unsafe { String::from_utf8_unchecked(v) }
 }
 
 #[test]
@@ -361,8 +402,8 @@ fn test_get_data_size() {
 
 #[test]
 fn test_difficulty_test() {
-	let hash = [0xf5, 0x7e, 0x6f, 0x3a, 0xcf, 0xc0, 0xdd, 0x4b, 0x5b, 0xf2, 0xbe, 0xe4, 0x0a, 0xb3, 0x35, 0x8a, 0xa6, 0x87, 0x73, 0xa8, 0xd0, 0x9f, 0x5e, 0x59, 0x5e, 0xab, 0x55, 0x94, 0x05,  0x52, 0x7d, 0x72];
-	let mix_hash = [0x1f, 0xff, 0x04, 0xce, 0xc9, 0x41, 0x73, 0xfd, 0x59, 0x1e, 0x3d, 0x89, 0x60, 0xce, 0x6b, 0xdf, 0x8b, 0x19, 0x71, 0x04, 0x8c, 0x71, 0xff, 0x93, 0x7b, 0xb2, 0xd3, 0x2a, 0x64, 0x31, 0xab, 0x6d ];
+	let hash = [0xf5, 0x7e, 0x6f, 0x3a, 0xcf, 0xc0, 0xdd, 0x4b, 0x5b, 0xf2, 0xbe, 0xe4, 0x0a, 0xb3, 0x35, 0x8a, 0xa6, 0x87, 0x73, 0xa8, 0xd0, 0x9f, 0x5e, 0x59, 0x5e, 0xab, 0x55, 0x94, 0x05, 0x52, 0x7d, 0x72];
+	let mix_hash = [0x1f, 0xff, 0x04, 0xce, 0xc9, 0x41, 0x73, 0xfd, 0x59, 0x1e, 0x3d, 0x89, 0x60, 0xce, 0x6b, 0xdf, 0x8b, 0x19, 0x71, 0x04, 0x8c, 0x71, 0xff, 0x93, 0x7b, 0xb2, 0xd3, 0x2a, 0x64, 0x31, 0xab, 0x6d];
 	let nonce = 0xd7b3ac70a301a249;
 	let boundary_good = [0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x3e, 0x9b, 0x6c, 0x69, 0xbc, 0x2c, 0xe2, 0xa2, 0x4a, 0x8e, 0x95, 0x69, 0xef, 0xc7, 0xd7, 0x1b, 0x33, 0x35, 0xdf, 0x36, 0x8c, 0x9a, 0xe9, 0x7e, 0x53, 0x84];
 	assert_eq!(quick_get_difficulty(&hash, nonce, &mix_hash)[..], boundary_good[..]);
@@ -372,8 +413,8 @@ fn test_difficulty_test() {
 
 #[test]
 fn test_light_compute() {
-	let hash = [0xf5, 0x7e, 0x6f, 0x3a, 0xcf, 0xc0, 0xdd, 0x4b, 0x5b, 0xf2, 0xbe, 0xe4, 0x0a, 0xb3, 0x35, 0x8a, 0xa6, 0x87, 0x73, 0xa8, 0xd0, 0x9f, 0x5e, 0x59, 0x5e, 0xab, 0x55, 0x94, 0x05,  0x52, 0x7d, 0x72];
-	let mix_hash = [0x1f, 0xff, 0x04, 0xce, 0xc9, 0x41, 0x73, 0xfd, 0x59, 0x1e, 0x3d, 0x89, 0x60, 0xce, 0x6b, 0xdf, 0x8b, 0x19, 0x71, 0x04, 0x8c, 0x71, 0xff, 0x93, 0x7b, 0xb2, 0xd3, 0x2a, 0x64, 0x31, 0xab, 0x6d ];
+	let hash = [0xf5, 0x7e, 0x6f, 0x3a, 0xcf, 0xc0, 0xdd, 0x4b, 0x5b, 0xf2, 0xbe, 0xe4, 0x0a, 0xb3, 0x35, 0x8a, 0xa6, 0x87, 0x73, 0xa8, 0xd0, 0x9f, 0x5e, 0x59, 0x5e, 0xab, 0x55, 0x94, 0x05, 0x52, 0x7d, 0x72];
+	let mix_hash = [0x1f, 0xff, 0x04, 0xce, 0xc9, 0x41, 0x73, 0xfd, 0x59, 0x1e, 0x3d, 0x89, 0x60, 0xce, 0x6b, 0xdf, 0x8b, 0x19, 0x71, 0x04, 0x8c, 0x71, 0xff, 0x93, 0x7b, 0xb2, 0xd3, 0x2a, 0x64, 0x31, 0xab, 0x6d];
 	let boundary = [0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x3e, 0x9b, 0x6c, 0x69, 0xbc, 0x2c, 0xe2, 0xa2, 0x4a, 0x8e, 0x95, 0x69, 0xef, 0xc7, 0xd7, 0x1b, 0x33, 0x35, 0xdf, 0x36, 0x8c, 0x9a, 0xe9, 0x7e, 0x53, 0x84];
 	let nonce = 0xd7b3ac70a301a249;
 	// difficulty = 0x085657254bd9u64;
@@ -382,3 +423,34 @@ fn test_light_compute() {
 	assert_eq!(result.mix_hash[..], mix_hash[..]);
 	assert_eq!(result.value[..], boundary[..]);
 }
+
+#[test]
+fn test_seed_compute_once() {
+	let seed_compute = SeedHashCompute::new();
+	let hash = [241, 175, 44, 134, 39, 121, 245, 239, 228, 236, 43, 160, 195, 152, 46, 7, 199, 5, 253, 147, 241, 206, 98, 43, 3, 104, 17, 40, 192, 79, 106, 162];
+	assert_eq!(seed_compute.get_seedhash(486382), hash);
+}
+
+#[test]
+fn test_seed_compute_zero() {
+	let seed_compute = SeedHashCompute::new();
+	assert_eq!(seed_compute.get_seedhash(0), [0u8; 32]);
+}
+
+#[test]
+fn test_seed_compute_after_older() {
+	let seed_compute = SeedHashCompute::new();
+	// calculating an older value first shouldn't affect the result
+	let _ = seed_compute.get_seedhash(50000);
+	let hash = [241, 175, 44, 134, 39, 121, 245, 239, 228, 236, 43, 160, 195, 152, 46, 7, 199, 5, 253, 147, 241, 206, 98, 43, 3, 104, 17, 40, 192, 79, 106, 162];
+	assert_eq!(seed_compute.get_seedhash(486382), hash);
+}
+
+#[test]
+fn test_seed_compute_after_newer() {
+	let seed_compute = SeedHashCompute::new();
+	// calculating an newer value first shouldn't affect the result
+	let _ = seed_compute.get_seedhash(972764);
+	let hash = [241, 175, 44, 134, 39, 121, 245, 239, 228, 236, 43, 160, 195, 152, 46, 7, 199, 5, 253, 147, 241, 206, 98, 43, 3, 104, 17, 40, 192, 79, 106, 162];
+	assert_eq!(seed_compute.get_seedhash(486382), hash);
+}

ethash/src/lib.rs

@@ -24,7 +24,7 @@ mod compute;
 
 use std::mem;
 use compute::Light;
-pub use compute::{get_seedhash, quick_get_difficulty, H256, ProofOfWork, ETHASH_EPOCH_LENGTH};
+pub use compute::{ETHASH_EPOCH_LENGTH, H256, ProofOfWork, SeedHashCompute, quick_get_difficulty};
 
 use std::sync::{Arc, Mutex};
 
@@ -76,7 +76,7 @@ impl EthashManager {
 						lights.recent.clone()
 					}
 					_ => None,
-				}
+				},
 			};
 			match light {
 				None => {
@@ -95,7 +95,7 @@ impl EthashManager {
 					lights.prev = mem::replace(&mut lights.recent, Some(light.clone()));
 					light
 				}
-				Some(light) => light
+				Some(light) => light,
 			}
 		};
 		light.compute(header_hash, nonce)

ethcore/Cargo.toml

@@ -3,8 +3,13 @@ description = "Ethcore library"
 homepage = "http://ethcore.io"
 license = "GPL-3.0"
 name = "ethcore"
-version = "1.1.0"
+version = "1.2.0"
 authors = ["Ethcore <admin@ethcore.io>"]
+build = "build.rs"
+
+[build-dependencies]
+syntex = "*"
+"ethcore-ipc-codegen" = { path = "../ipc/codegen" }
 
 [dependencies]
 log = "0.3"
@@ -17,10 +22,19 @@ ethcore-util = { path = "../util" }
 evmjit = { path = "../evmjit", optional = true }
 ethash = { path = "../ethash" }
 num_cpus = "0.2"
-clippy = { version = "0.0.50", optional = true }
-crossbeam = "0.1.5"
-lazy_static = "0.1"
+clippy = { version = "0.0.77", optional = true}
+crossbeam = "0.2.9"
+lazy_static = "0.2"
 ethcore-devtools = { path = "../devtools" }
+ethjson = { path = "../json" }
+bloomchain = "0.1"
+"ethcore-ipc" = { path = "../ipc/rpc" }
+rayon = "0.3.1"
+ethstore = { path = "../ethstore" }
+
+[dependencies.hyper]
+git = "https://github.com/ethcore/hyper"
+default-features = false
 
 [features]
 jit = ["evmjit"]

ethcore/build.rs

@@ -0,0 +1,33 @@
+// 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 syntex;
+extern crate ethcore_ipc_codegen as codegen;
+
+use std::env;
+use std::path::Path;
+
+fn main() {
+	let out_dir = env::var_os("OUT_DIR").unwrap();
+	// serialization pass
+	{
+		let src = Path::new("src/types/mod.rs.in");
+		let dst = Path::new(&out_dir).join("types.rs");
+		let mut registry = syntex::Registry::new();
+		codegen::register(&mut registry);
+		registry.expand("", &src, &dst).unwrap();
+	}
+}

ethcore/res/ethereum/daohardfork_test.json

@@ -0,0 +1,162 @@
+{
+	"name": "DAO hard-fork consensus test",
+	"engine": {
+		"Ethash": {
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"minimumDifficulty": "0x020000",
+				"difficultyBoundDivisor": "0x0800",
+				"durationLimit": "0x0d",
+				"blockReward": "0x4563918244F40000",
+				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
+				"frontierCompatibilityModeLimit": "0x5",
+				"daoHardforkTransition": "0x8",
+				"daoHardforkBeneficiary": "0xbf4ed7b27f1d666546e30d74d50d173d20bca754",
+				"daoHardforkAccounts": [  
+					"0xd4fe7bc31cedb7bfb8a345f31e668033056b2728",
+					"0xb3fb0e5aba0e20e5c49d252dfd30e102b171a425",
+					"0x2c19c7f9ae8b751e37aeb2d93a699722395ae18f",
+					"0xecd135fa4f61a655311e86238c92adcd779555d2",
+					"0x1975bd06d486162d5dc297798dfc41edd5d160a7",
+					"0xa3acf3a1e16b1d7c315e23510fdd7847b48234f6",
+					"0x319f70bab6845585f412ec7724b744fec6095c85",
+					"0x06706dd3f2c9abf0a21ddcc6941d9b86f0596936",
+					"0x5c8536898fbb74fc7445814902fd08422eac56d0",
+					"0x6966ab0d485353095148a2155858910e0965b6f9",
+					"0x779543a0491a837ca36ce8c635d6154e3c4911a6",
+					"0x2a5ed960395e2a49b1c758cef4aa15213cfd874c",
+					"0x5c6e67ccd5849c0d29219c4f95f1a7a93b3f5dc5",
+					"0x9c50426be05db97f5d64fc54bf89eff947f0a321",
+					"0x200450f06520bdd6c527622a273333384d870efb",
+					"0xbe8539bfe837b67d1282b2b1d61c3f723966f049",
+					"0x6b0c4d41ba9ab8d8cfb5d379c69a612f2ced8ecb",
+					"0xf1385fb24aad0cd7432824085e42aff90886fef5",
+					"0xd1ac8b1ef1b69ff51d1d401a476e7e612414f091",
+					"0x8163e7fb499e90f8544ea62bbf80d21cd26d9efd",
+					"0x51e0ddd9998364a2eb38588679f0d2c42653e4a6",
+					"0x627a0a960c079c21c34f7612d5d230e01b4ad4c7",
+					"0xf0b1aa0eb660754448a7937c022e30aa692fe0c5",
+					"0x24c4d950dfd4dd1902bbed3508144a54542bba94",
+					"0x9f27daea7aca0aa0446220b98d028715e3bc803d",
+					"0xa5dc5acd6a7968a4554d89d65e59b7fd3bff0f90",
+					"0xd9aef3a1e38a39c16b31d1ace71bca8ef58d315b",
+					"0x63ed5a272de2f6d968408b4acb9024f4cc208ebf",
+					"0x6f6704e5a10332af6672e50b3d9754dc460dfa4d",
+					"0x77ca7b50b6cd7e2f3fa008e24ab793fd56cb15f6",
+					"0x492ea3bb0f3315521c31f273e565b868fc090f17",
+					"0x0ff30d6de14a8224aa97b78aea5388d1c51c1f00",
+					"0x9ea779f907f0b315b364b0cfc39a0fde5b02a416",
+					"0xceaeb481747ca6c540a000c1f3641f8cef161fa7",
+					"0xcc34673c6c40e791051898567a1222daf90be287",
+					"0x579a80d909f346fbfb1189493f521d7f48d52238",
+					"0xe308bd1ac5fda103967359b2712dd89deffb7973",
+					"0x4cb31628079fb14e4bc3cd5e30c2f7489b00960c",
+					"0xac1ecab32727358dba8962a0f3b261731aad9723",
+					"0x4fd6ace747f06ece9c49699c7cabc62d02211f75",
+					"0x440c59b325d2997a134c2c7c60a8c61611212bad",
+					"0x4486a3d68fac6967006d7a517b889fd3f98c102b",
+					"0x9c15b54878ba618f494b38f0ae7443db6af648ba",
+					"0x27b137a85656544b1ccb5a0f2e561a5703c6a68f",
+					"0x21c7fdb9ed8d291d79ffd82eb2c4356ec0d81241",
+					"0x23b75c2f6791eef49c69684db4c6c1f93bf49a50",
+					"0x1ca6abd14d30affe533b24d7a21bff4c2d5e1f3b",
+					"0xb9637156d330c0d605a791f1c31ba5890582fe1c",
+					"0x6131c42fa982e56929107413a9d526fd99405560",
+					"0x1591fc0f688c81fbeb17f5426a162a7024d430c2",
+					"0x542a9515200d14b68e934e9830d91645a980dd7a",
+					"0xc4bbd073882dd2add2424cf47d35213405b01324",
+					"0x782495b7b3355efb2833d56ecb34dc22ad7dfcc4",
+					"0x58b95c9a9d5d26825e70a82b6adb139d3fd829eb",
+					"0x3ba4d81db016dc2890c81f3acec2454bff5aada5",
+					"0xb52042c8ca3f8aa246fa79c3feaa3d959347c0ab",
+					"0xe4ae1efdfc53b73893af49113d8694a057b9c0d1",
+					"0x3c02a7bc0391e86d91b7d144e61c2c01a25a79c5",
+					"0x0737a6b837f97f46ebade41b9bc3e1c509c85c53",
+					"0x97f43a37f595ab5dd318fb46e7a155eae057317a",
+					"0x52c5317c848ba20c7504cb2c8052abd1fde29d03",
+					"0x4863226780fe7c0356454236d3b1c8792785748d",
+					"0x5d2b2e6fcbe3b11d26b525e085ff818dae332479",
+					"0x5f9f3392e9f62f63b8eac0beb55541fc8627f42c",
+					"0x057b56736d32b86616a10f619859c6cd6f59092a",
+					"0x9aa008f65de0b923a2a4f02012ad034a5e2e2192",
+					"0x304a554a310c7e546dfe434669c62820b7d83490",
+					"0x914d1b8b43e92723e64fd0a06f5bdb8dd9b10c79",
+					"0x4deb0033bb26bc534b197e61d19e0733e5679784",
+					"0x07f5c1e1bc2c93e0402f23341973a0e043f7bf8a",
+					"0x35a051a0010aba705c9008d7a7eff6fb88f6ea7b",
+					"0x4fa802324e929786dbda3b8820dc7834e9134a2a",
+					"0x9da397b9e80755301a3b32173283a91c0ef6c87e",
+					"0x8d9edb3054ce5c5774a420ac37ebae0ac02343c6",
+					"0x0101f3be8ebb4bbd39a2e3b9a3639d4259832fd9",
+					"0x5dc28b15dffed94048d73806ce4b7a4612a1d48f",
+					"0xbcf899e6c7d9d5a215ab1e3444c86806fa854c76",
+					"0x12e626b0eebfe86a56d633b9864e389b45dcb260",
+					"0xa2f1ccba9395d7fcb155bba8bc92db9bafaeade7",
+					"0xec8e57756626fdc07c63ad2eafbd28d08e7b0ca5",
+					"0xd164b088bd9108b60d0ca3751da4bceb207b0782",
+					"0x6231b6d0d5e77fe001c2a460bd9584fee60d409b",
+					"0x1cba23d343a983e9b5cfd19496b9a9701ada385f",
+					"0xa82f360a8d3455c5c41366975bde739c37bfeb8a",
+					"0x9fcd2deaff372a39cc679d5c5e4de7bafb0b1339",
+					"0x005f5cee7a43331d5a3d3eec71305925a62f34b6",
+					"0x0e0da70933f4c7849fc0d203f5d1d43b9ae4532d",
+					"0xd131637d5275fd1a68a3200f4ad25c71a2a9522e",
+					"0xbc07118b9ac290e4622f5e77a0853539789effbe",
+					"0x47e7aa56d6bdf3f36be34619660de61275420af8",
+					"0xacd87e28b0c9d1254e868b81cba4cc20d9a32225",
+					"0xadf80daec7ba8dcf15392f1ac611fff65d94f880",
+					"0x5524c55fb03cf21f549444ccbecb664d0acad706",
+					"0x40b803a9abce16f50f36a77ba41180eb90023925",
+					"0xfe24cdd8648121a43a7c86d289be4dd2951ed49f",
+					"0x17802f43a0137c506ba92291391a8a8f207f487d",
+					"0x253488078a4edf4d6f42f113d1e62836a942cf1a",
+					"0x86af3e9626fce1957c82e88cbf04ddf3a2ed7915",
+					"0xb136707642a4ea12fb4bae820f03d2562ebff487",
+					"0xdbe9b615a3ae8709af8b93336ce9b477e4ac0940",
+					"0xf14c14075d6c4ed84b86798af0956deef67365b5",
+					"0xca544e5c4687d109611d0f8f928b53a25af72448",
+					"0xaeeb8ff27288bdabc0fa5ebb731b6f409507516c",
+					"0xcbb9d3703e651b0d496cdefb8b92c25aeb2171f7",
+					"0x6d87578288b6cb5549d5076a207456a1f6a63dc0",
+					"0xb2c6f0dfbb716ac562e2d85d6cb2f8d5ee87603e",
+					"0xaccc230e8a6e5be9160b8cdf2864dd2a001c28b6",
+					"0x2b3455ec7fedf16e646268bf88846bd7a2319bb2",
+					"0x4613f3bca5c44ea06337a9e439fbc6d42e501d0a",
+					"0xd343b217de44030afaa275f54d31a9317c7f441e",
+					"0x84ef4b2357079cd7a7c69fd7a37cd0609a679106",
+					"0xda2fef9e4a3230988ff17df2165440f37e8b1708",
+					"0xf4c64518ea10f995918a454158c6b61407ea345c",
+					"0x7602b46df5390e432ef1c307d4f2c9ff6d65cc97",
+					"0xbb9bc244d798123fde783fcc1c72d3bb8c189413",
+					"0x807640a13483f8ac783c557fcdf27be11ea4ac7a"
+				]
+			}
+		}
+	},
+	"params": {
+		"accountStartNonce": "0x00",
+		"maximumExtraDataSize": "0x20",
+		"minGasLimit": "0x1388",
+		"networkID" : "0x1"
+	},
+	"genesis": {
+		"seal": {
+			"ethereum": {
+				"nonce": "0x0000000000000042",
+				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
+			}
+		},
+		"difficulty": "0x400000000",
+		"author": "0x0000000000000000000000000000000000000000",
+		"timestamp": "0x00",
+		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+		"extraData": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",
+		"gasLimit": "0x1388"
+	},
+	"accounts": {
+		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
+		"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
+		"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
+		"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } }
+	}
+}

ethcore/res/ethereum/frontier.json

@@ -1,24 +1,154 @@
 {
 	"name": "Frontier/Homestead",
-	"engineName": "Ethash",
+	"engine": {
+		"Ethash": {
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"minimumDifficulty": "0x020000",
+				"difficultyBoundDivisor": "0x0800",
+				"durationLimit": "0x0d",
+				"blockReward": "0x4563918244F40000",
+				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
+				"frontierCompatibilityModeLimit": "0x118c30",
+				"daoHardforkTransition": "0x1d4c00",
+				"daoHardforkBeneficiary": "0xbf4ed7b27f1d666546e30d74d50d173d20bca754",
+				"daoHardforkAccounts": [  
+					"0xd4fe7bc31cedb7bfb8a345f31e668033056b2728",
+					"0xb3fb0e5aba0e20e5c49d252dfd30e102b171a425",
+					"0x2c19c7f9ae8b751e37aeb2d93a699722395ae18f",
+					"0xecd135fa4f61a655311e86238c92adcd779555d2",
+					"0x1975bd06d486162d5dc297798dfc41edd5d160a7",
+					"0xa3acf3a1e16b1d7c315e23510fdd7847b48234f6",
+					"0x319f70bab6845585f412ec7724b744fec6095c85",
+					"0x06706dd3f2c9abf0a21ddcc6941d9b86f0596936",
+					"0x5c8536898fbb74fc7445814902fd08422eac56d0",
+					"0x6966ab0d485353095148a2155858910e0965b6f9",
+					"0x779543a0491a837ca36ce8c635d6154e3c4911a6",
+					"0x2a5ed960395e2a49b1c758cef4aa15213cfd874c",
+					"0x5c6e67ccd5849c0d29219c4f95f1a7a93b3f5dc5",
+					"0x9c50426be05db97f5d64fc54bf89eff947f0a321",
+					"0x200450f06520bdd6c527622a273333384d870efb",
+					"0xbe8539bfe837b67d1282b2b1d61c3f723966f049",
+					"0x6b0c4d41ba9ab8d8cfb5d379c69a612f2ced8ecb",
+					"0xf1385fb24aad0cd7432824085e42aff90886fef5",
+					"0xd1ac8b1ef1b69ff51d1d401a476e7e612414f091",
+					"0x8163e7fb499e90f8544ea62bbf80d21cd26d9efd",
+					"0x51e0ddd9998364a2eb38588679f0d2c42653e4a6",
+					"0x627a0a960c079c21c34f7612d5d230e01b4ad4c7",
+					"0xf0b1aa0eb660754448a7937c022e30aa692fe0c5",
+					"0x24c4d950dfd4dd1902bbed3508144a54542bba94",
+					"0x9f27daea7aca0aa0446220b98d028715e3bc803d",
+					"0xa5dc5acd6a7968a4554d89d65e59b7fd3bff0f90",
+					"0xd9aef3a1e38a39c16b31d1ace71bca8ef58d315b",
+					"0x63ed5a272de2f6d968408b4acb9024f4cc208ebf",
+					"0x6f6704e5a10332af6672e50b3d9754dc460dfa4d",
+					"0x77ca7b50b6cd7e2f3fa008e24ab793fd56cb15f6",
+					"0x492ea3bb0f3315521c31f273e565b868fc090f17",
+					"0x0ff30d6de14a8224aa97b78aea5388d1c51c1f00",
+					"0x9ea779f907f0b315b364b0cfc39a0fde5b02a416",
+					"0xceaeb481747ca6c540a000c1f3641f8cef161fa7",
+					"0xcc34673c6c40e791051898567a1222daf90be287",
+					"0x579a80d909f346fbfb1189493f521d7f48d52238",
+					"0xe308bd1ac5fda103967359b2712dd89deffb7973",
+					"0x4cb31628079fb14e4bc3cd5e30c2f7489b00960c",
+					"0xac1ecab32727358dba8962a0f3b261731aad9723",
+					"0x4fd6ace747f06ece9c49699c7cabc62d02211f75",
+					"0x440c59b325d2997a134c2c7c60a8c61611212bad",
+					"0x4486a3d68fac6967006d7a517b889fd3f98c102b",
+					"0x9c15b54878ba618f494b38f0ae7443db6af648ba",
+					"0x27b137a85656544b1ccb5a0f2e561a5703c6a68f",
+					"0x21c7fdb9ed8d291d79ffd82eb2c4356ec0d81241",
+					"0x23b75c2f6791eef49c69684db4c6c1f93bf49a50",
+					"0x1ca6abd14d30affe533b24d7a21bff4c2d5e1f3b",
+					"0xb9637156d330c0d605a791f1c31ba5890582fe1c",
+					"0x6131c42fa982e56929107413a9d526fd99405560",
+					"0x1591fc0f688c81fbeb17f5426a162a7024d430c2",
+					"0x542a9515200d14b68e934e9830d91645a980dd7a",
+					"0xc4bbd073882dd2add2424cf47d35213405b01324",
+					"0x782495b7b3355efb2833d56ecb34dc22ad7dfcc4",
+					"0x58b95c9a9d5d26825e70a82b6adb139d3fd829eb",
+					"0x3ba4d81db016dc2890c81f3acec2454bff5aada5",
+					"0xb52042c8ca3f8aa246fa79c3feaa3d959347c0ab",
+					"0xe4ae1efdfc53b73893af49113d8694a057b9c0d1",
+					"0x3c02a7bc0391e86d91b7d144e61c2c01a25a79c5",
+					"0x0737a6b837f97f46ebade41b9bc3e1c509c85c53",
+					"0x97f43a37f595ab5dd318fb46e7a155eae057317a",
+					"0x52c5317c848ba20c7504cb2c8052abd1fde29d03",
+					"0x4863226780fe7c0356454236d3b1c8792785748d",
+					"0x5d2b2e6fcbe3b11d26b525e085ff818dae332479",
+					"0x5f9f3392e9f62f63b8eac0beb55541fc8627f42c",
+					"0x057b56736d32b86616a10f619859c6cd6f59092a",
+					"0x9aa008f65de0b923a2a4f02012ad034a5e2e2192",
+					"0x304a554a310c7e546dfe434669c62820b7d83490",
+					"0x914d1b8b43e92723e64fd0a06f5bdb8dd9b10c79",
+					"0x4deb0033bb26bc534b197e61d19e0733e5679784",
+					"0x07f5c1e1bc2c93e0402f23341973a0e043f7bf8a",
+					"0x35a051a0010aba705c9008d7a7eff6fb88f6ea7b",
+					"0x4fa802324e929786dbda3b8820dc7834e9134a2a",
+					"0x9da397b9e80755301a3b32173283a91c0ef6c87e",
+					"0x8d9edb3054ce5c5774a420ac37ebae0ac02343c6",
+					"0x0101f3be8ebb4bbd39a2e3b9a3639d4259832fd9",
+					"0x5dc28b15dffed94048d73806ce4b7a4612a1d48f",
+					"0xbcf899e6c7d9d5a215ab1e3444c86806fa854c76",
+					"0x12e626b0eebfe86a56d633b9864e389b45dcb260",
+					"0xa2f1ccba9395d7fcb155bba8bc92db9bafaeade7",
+					"0xec8e57756626fdc07c63ad2eafbd28d08e7b0ca5",
+					"0xd164b088bd9108b60d0ca3751da4bceb207b0782",
+					"0x6231b6d0d5e77fe001c2a460bd9584fee60d409b",
+					"0x1cba23d343a983e9b5cfd19496b9a9701ada385f",
+					"0xa82f360a8d3455c5c41366975bde739c37bfeb8a",
+					"0x9fcd2deaff372a39cc679d5c5e4de7bafb0b1339",
+					"0x005f5cee7a43331d5a3d3eec71305925a62f34b6",
+					"0x0e0da70933f4c7849fc0d203f5d1d43b9ae4532d",
+					"0xd131637d5275fd1a68a3200f4ad25c71a2a9522e",
+					"0xbc07118b9ac290e4622f5e77a0853539789effbe",
+					"0x47e7aa56d6bdf3f36be34619660de61275420af8",
+					"0xacd87e28b0c9d1254e868b81cba4cc20d9a32225",
+					"0xadf80daec7ba8dcf15392f1ac611fff65d94f880",
+					"0x5524c55fb03cf21f549444ccbecb664d0acad706",
+					"0x40b803a9abce16f50f36a77ba41180eb90023925",
+					"0xfe24cdd8648121a43a7c86d289be4dd2951ed49f",
+					"0x17802f43a0137c506ba92291391a8a8f207f487d",
+					"0x253488078a4edf4d6f42f113d1e62836a942cf1a",
+					"0x86af3e9626fce1957c82e88cbf04ddf3a2ed7915",
+					"0xb136707642a4ea12fb4bae820f03d2562ebff487",
+					"0xdbe9b615a3ae8709af8b93336ce9b477e4ac0940",
+					"0xf14c14075d6c4ed84b86798af0956deef67365b5",
+					"0xca544e5c4687d109611d0f8f928b53a25af72448",
+					"0xaeeb8ff27288bdabc0fa5ebb731b6f409507516c",
+					"0xcbb9d3703e651b0d496cdefb8b92c25aeb2171f7",
+					"0x6d87578288b6cb5549d5076a207456a1f6a63dc0",
+					"0xb2c6f0dfbb716ac562e2d85d6cb2f8d5ee87603e",
+					"0xaccc230e8a6e5be9160b8cdf2864dd2a001c28b6",
+					"0x2b3455ec7fedf16e646268bf88846bd7a2319bb2",
+					"0x4613f3bca5c44ea06337a9e439fbc6d42e501d0a",
+					"0xd343b217de44030afaa275f54d31a9317c7f441e",
+					"0x84ef4b2357079cd7a7c69fd7a37cd0609a679106",
+					"0xda2fef9e4a3230988ff17df2165440f37e8b1708",
+					"0xf4c64518ea10f995918a454158c6b61407ea345c",
+					"0x7602b46df5390e432ef1c307d4f2c9ff6d65cc97",
+					"0xbb9bc244d798123fde783fcc1c72d3bb8c189413",
+					"0x807640a13483f8ac783c557fcdf27be11ea4ac7a"
+				]
+			}
+		}
+	},
 	"params": {
 		"accountStartNonce": "0x00",
-		"frontierCompatibilityModeLimit": "0x118c30",
 		"maximumExtraDataSize": "0x20",
-		"tieBreakingGas": false,
 		"minGasLimit": "0x1388",
-		"gasLimitBoundDivisor": "0x0400",
-		"minimumDifficulty": "0x020000",
-		"difficultyBoundDivisor": "0x0800",
-		"durationLimit": "0x0d",
-		"blockReward": "0x4563918244F40000",
-		"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-		"networkID" : "0x1"
+		"networkID" : "0x1",
+		"forkBlock": "0x1d4c00",
+		"forkCanonHash": "0x4985f5ca3d2afbec36529aa96f74de3cc10a2a4a6c44f2157a57d2c6059a11bb"
 	},
 	"genesis": {
-		"nonce": "0x0000000000000042",
+		"seal": {
+			"ethereum": {
+				"nonce": "0x0000000000000042",
+				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
+			}
+		},
 		"difficulty": "0x400000000",
-		"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
 		"author": "0x0000000000000000000000000000000000000000",
 		"timestamp": "0x00",
 		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
@@ -30,13 +160,13 @@
 		"enode://a979fb575495b8d6db44f750317d0f4622bf4c2aa3365d6af7c284339968eef29b69ad0dce72a4d8db5ebb4968de0e3bec910127f134779fbcb0cb6d3331163c@52.16.188.185:30303",
 		"enode://de471bccee3d042261d52e9bff31458daecc406142b401d4cd848f677479f73104b9fdeb090af9583d3391b7f10cb2ba9e26865dd5fca4fcdc0fb1e3b723c786@54.94.239.50:30303",
 		"enode://1118980bf48b0a3640bdba04e0fe78b1add18e1cd99bf22d53daac1fd9972ad650df52176e7c7d89d1114cfef2bc23a2959aa54998a46afcf7d91809f0855082@52.74.57.123:30303",
-		"enode://248f12bc8b18d5289358085520ac78cd8076485211e6d96ab0bc93d6cd25442db0ce3a937dc404f64f207b0b9aed50e25e98ce32af5ac7cb321ff285b97de485@parity-node-zero.ethcore.io:30303"
+		"enode://248f12bc8b18d5289358085520ac78cd8076485211e6d96ab0bc93d6cd25442db0ce3a937dc404f64f207b0b9aed50e25e98ce32af5ac7cb321ff285b97de485@zero.parity.io:30303"
 	],
 	"accounts": {
-		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "linear": { "base": 3000, "word": 0 } } },
-		"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "linear": { "base": 60, "word": 12 } } },
-		"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "linear": { "base": 600, "word": 120 } } },
-		"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "linear": { "base": 15, "word": 3 } } },
+		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
+		"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
+		"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
+		"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } },
 		"3282791d6fd713f1e94f4bfd565eaa78b3a0599d": {
 			"balance": "1337000000000000000000"
 		},

ethcore/res/ethereum/frontier_like_test.json

@@ -1,24 +1,152 @@
 {
-	"engineName": "Frontier (Test)",
-	"engineName": "Ethash",
+	"name": "Frontier (Test)",
+	"engine": {
+		"Ethash": {
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"minimumDifficulty": "0x020000",
+				"difficultyBoundDivisor": "0x0800",
+				"durationLimit": "0x0d",
+				"blockReward": "0x4563918244F40000",
+				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
+				"frontierCompatibilityModeLimit": "0x118c30",
+				"daoHardforkTransition": "0x1d4c00",
+				"daoHardforkBeneficiary": "0xbf4ed7b27f1d666546e30d74d50d173d20bca754",
+				"daoHardforkAccounts": [  
+					"0xd4fe7bc31cedb7bfb8a345f31e668033056b2728",
+					"0xb3fb0e5aba0e20e5c49d252dfd30e102b171a425",
+					"0x2c19c7f9ae8b751e37aeb2d93a699722395ae18f",
+					"0xecd135fa4f61a655311e86238c92adcd779555d2",
+					"0x1975bd06d486162d5dc297798dfc41edd5d160a7",
+					"0xa3acf3a1e16b1d7c315e23510fdd7847b48234f6",
+					"0x319f70bab6845585f412ec7724b744fec6095c85",
+					"0x06706dd3f2c9abf0a21ddcc6941d9b86f0596936",
+					"0x5c8536898fbb74fc7445814902fd08422eac56d0",
+					"0x6966ab0d485353095148a2155858910e0965b6f9",
+					"0x779543a0491a837ca36ce8c635d6154e3c4911a6",
+					"0x2a5ed960395e2a49b1c758cef4aa15213cfd874c",
+					"0x5c6e67ccd5849c0d29219c4f95f1a7a93b3f5dc5",
+					"0x9c50426be05db97f5d64fc54bf89eff947f0a321",
+					"0x200450f06520bdd6c527622a273333384d870efb",
+					"0xbe8539bfe837b67d1282b2b1d61c3f723966f049",
+					"0x6b0c4d41ba9ab8d8cfb5d379c69a612f2ced8ecb",
+					"0xf1385fb24aad0cd7432824085e42aff90886fef5",
+					"0xd1ac8b1ef1b69ff51d1d401a476e7e612414f091",
+					"0x8163e7fb499e90f8544ea62bbf80d21cd26d9efd",
+					"0x51e0ddd9998364a2eb38588679f0d2c42653e4a6",
+					"0x627a0a960c079c21c34f7612d5d230e01b4ad4c7",
+					"0xf0b1aa0eb660754448a7937c022e30aa692fe0c5",
+					"0x24c4d950dfd4dd1902bbed3508144a54542bba94",
+					"0x9f27daea7aca0aa0446220b98d028715e3bc803d",
+					"0xa5dc5acd6a7968a4554d89d65e59b7fd3bff0f90",
+					"0xd9aef3a1e38a39c16b31d1ace71bca8ef58d315b",
+					"0x63ed5a272de2f6d968408b4acb9024f4cc208ebf",
+					"0x6f6704e5a10332af6672e50b3d9754dc460dfa4d",
+					"0x77ca7b50b6cd7e2f3fa008e24ab793fd56cb15f6",
+					"0x492ea3bb0f3315521c31f273e565b868fc090f17",
+					"0x0ff30d6de14a8224aa97b78aea5388d1c51c1f00",
+					"0x9ea779f907f0b315b364b0cfc39a0fde5b02a416",
+					"0xceaeb481747ca6c540a000c1f3641f8cef161fa7",
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+					"0x4486a3d68fac6967006d7a517b889fd3f98c102b",
+					"0x9c15b54878ba618f494b38f0ae7443db6af648ba",
+					"0x27b137a85656544b1ccb5a0f2e561a5703c6a68f",
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+					"0x1ca6abd14d30affe533b24d7a21bff4c2d5e1f3b",
+					"0xb9637156d330c0d605a791f1c31ba5890582fe1c",
+					"0x6131c42fa982e56929107413a9d526fd99405560",
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+					"0x9aa008f65de0b923a2a4f02012ad034a5e2e2192",
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+					"0x4deb0033bb26bc534b197e61d19e0733e5679784",
+					"0x07f5c1e1bc2c93e0402f23341973a0e043f7bf8a",
+					"0x35a051a0010aba705c9008d7a7eff6fb88f6ea7b",
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+					"0x8d9edb3054ce5c5774a420ac37ebae0ac02343c6",
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+					"0xbcf899e6c7d9d5a215ab1e3444c86806fa854c76",
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+					"0xec8e57756626fdc07c63ad2eafbd28d08e7b0ca5",
+					"0xd164b088bd9108b60d0ca3751da4bceb207b0782",
+					"0x6231b6d0d5e77fe001c2a460bd9584fee60d409b",
+					"0x1cba23d343a983e9b5cfd19496b9a9701ada385f",
+					"0xa82f360a8d3455c5c41366975bde739c37bfeb8a",
+					"0x9fcd2deaff372a39cc679d5c5e4de7bafb0b1339",
+					"0x005f5cee7a43331d5a3d3eec71305925a62f34b6",
+					"0x0e0da70933f4c7849fc0d203f5d1d43b9ae4532d",
+					"0xd131637d5275fd1a68a3200f4ad25c71a2a9522e",
+					"0xbc07118b9ac290e4622f5e77a0853539789effbe",
+					"0x47e7aa56d6bdf3f36be34619660de61275420af8",
+					"0xacd87e28b0c9d1254e868b81cba4cc20d9a32225",
+					"0xadf80daec7ba8dcf15392f1ac611fff65d94f880",
+					"0x5524c55fb03cf21f549444ccbecb664d0acad706",
+					"0x40b803a9abce16f50f36a77ba41180eb90023925",
+					"0xfe24cdd8648121a43a7c86d289be4dd2951ed49f",
+					"0x17802f43a0137c506ba92291391a8a8f207f487d",
+					"0x253488078a4edf4d6f42f113d1e62836a942cf1a",
+					"0x86af3e9626fce1957c82e88cbf04ddf3a2ed7915",
+					"0xb136707642a4ea12fb4bae820f03d2562ebff487",
+					"0xdbe9b615a3ae8709af8b93336ce9b477e4ac0940",
+					"0xf14c14075d6c4ed84b86798af0956deef67365b5",
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+					"0xaeeb8ff27288bdabc0fa5ebb731b6f409507516c",
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+					"0x6d87578288b6cb5549d5076a207456a1f6a63dc0",
+					"0xb2c6f0dfbb716ac562e2d85d6cb2f8d5ee87603e",
+					"0xaccc230e8a6e5be9160b8cdf2864dd2a001c28b6",
+					"0x2b3455ec7fedf16e646268bf88846bd7a2319bb2",
+					"0x4613f3bca5c44ea06337a9e439fbc6d42e501d0a",
+					"0xd343b217de44030afaa275f54d31a9317c7f441e",
+					"0x84ef4b2357079cd7a7c69fd7a37cd0609a679106",
+					"0xda2fef9e4a3230988ff17df2165440f37e8b1708",
+					"0xf4c64518ea10f995918a454158c6b61407ea345c",
+					"0x7602b46df5390e432ef1c307d4f2c9ff6d65cc97",
+					"0xbb9bc244d798123fde783fcc1c72d3bb8c189413",
+					"0x807640a13483f8ac783c557fcdf27be11ea4ac7a"
+				]
+			}
+		}
+	},
 	"params": {
 		"accountStartNonce": "0x00",
-		"frontierCompatibilityModeLimit": "0x118c30",
 		"maximumExtraDataSize": "0x20",
-		"tieBreakingGas": false,
 		"minGasLimit": "0x1388",
-		"gasLimitBoundDivisor": "0x0400",
-		"minimumDifficulty": "0x020000",
-		"difficultyBoundDivisor": "0x0800",
-		"durationLimit": "0x0d",
-		"blockReward": "0x4563918244F40000",
-		"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
 		"networkID" : "0x1"
 	},
 	"genesis": {
-		"nonce": "0x0000000000000042",
+		"seal": {
+			"ethereum": {
+				"nonce": "0x0000000000000042",
+				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
+			}
+		},
 		"difficulty": "0x400000000",
-		"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
 		"author": "0x0000000000000000000000000000000000000000",
 		"timestamp": "0x00",
 		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
@@ -26,9 +154,9 @@
 		"gasLimit": "0x1388"
 	},
 	"accounts": {
-		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "linear": { "base": 3000, "word": 0 } } },
-		"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "linear": { "base": 60, "word": 12 } } },
-		"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "linear": { "base": 600, "word": 120 } } },
-		"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "linear": { "base": 15, "word": 3 } } }
+		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
+		"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
+		"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
+		"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } }
 	}
 }

ethcore/res/ethereum/frontier_test.json

@@ -1,24 +1,32 @@
 {
-	"engineName": "Frontier (Test)",
-	"engineName": "Ethash",
+	"name": "Frontier (Test)",
+	"engine": {
+		"Ethash": {
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"minimumDifficulty": "0x020000",
+				"difficultyBoundDivisor": "0x0800",
+				"durationLimit": "0x0d",
+				"blockReward": "0x4563918244F40000",
+				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
+				"frontierCompatibilityModeLimit": "0xffffffffffffffff"
+			}
+		}
+	},
 	"params": {
 		"accountStartNonce": "0x00",
-		"frontierCompatibilityModeLimit": "0xffffffffffffffff",
 		"maximumExtraDataSize": "0x20",
-		"tieBreakingGas": false,
 		"minGasLimit": "0x1388",
-		"gasLimitBoundDivisor": "0x0400",
-		"minimumDifficulty": "0x020000",
-		"difficultyBoundDivisor": "0x0800",
-		"durationLimit": "0x0d",
-		"blockReward": "0x4563918244F40000",
-		"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
 		"networkID" : "0x1"
 	},
 	"genesis": {
-		"nonce": "0x0000000000000042",
+		"seal": {
+			"ethereum": {
+				"nonce": "0x0000000000000042",
+				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
+			}
+		},
 		"difficulty": "0x400000000",
-		"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
 		"author": "0x0000000000000000000000000000000000000000",
 		"timestamp": "0x00",
 		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
@@ -26,9 +34,9 @@
 		"gasLimit": "0x1388"
 	},
 	"accounts": {
-		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "linear": { "base": 3000, "word": 0 } } },
-		"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "linear": { "base": 60, "word": 12 } } },
-		"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "linear": { "base": 600, "word": 120 } } },
-		"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "linear": { "base": 15, "word": 3 } } }
+		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
+		"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
+		"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
+		"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } }
 	}
 }

ethcore/res/ethereum/homestead_test.json

@@ -1,24 +1,32 @@
 {
 	"name": "Homestead (Test)",
-	"engineName": "Ethash",
+	"engine": {
+		"Ethash": {
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"minimumDifficulty": "0x020000",
+				"difficultyBoundDivisor": "0x0800",
+				"durationLimit": "0x0d",
+				"blockReward": "0x4563918244F40000",
+				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
+				"frontierCompatibilityModeLimit": "0x0"
+			}
+		}
+	},
 	"params": {
 		"accountStartNonce": "0x00",
-		"frontierCompatibilityModeLimit": 0,
 		"maximumExtraDataSize": "0x20",
 		"minGasLimit": "0x1388",
-		"tieBreakingGas": false,
-		"gasLimitBoundDivisor": "0x0400",
-		"minimumDifficulty": "0x020000",
-		"difficultyBoundDivisor": "0x0800",
-		"durationLimit": "0x0d",
-		"blockReward": "0x4563918244F40000",
-		"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
 		"networkID" : "0x1"
 	},
 	"genesis": {
-		"nonce": "0x0000000000000042",
+		"seal": {
+			"ethereum": {
+				"nonce": "0x0000000000000042",
+				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
+			}
+		},
 		"difficulty": "0x400000000",
-		"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
 		"author": "0x0000000000000000000000000000000000000000",
 		"timestamp": "0x00",
 		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
@@ -26,9 +34,9 @@
 		"gasLimit": "0x1388"
 	},
 	"accounts": {
-		"0000000000000000000000000000000000000001": { "balance": "1", "builtin": { "name": "ecrecover", "linear": { "base": 3000, "word": 0 } } },
-		"0000000000000000000000000000000000000002": { "balance": "1", "builtin": { "name": "sha256", "linear": { "base": 60, "word": 12 } } },
-		"0000000000000000000000000000000000000003": { "balance": "1", "builtin": { "name": "ripemd160", "linear": { "base": 600, "word": 120 } } },
-		"0000000000000000000000000000000000000004": { "balance": "1", "builtin": { "name": "identity", "linear": { "base": 15, "word": 3 } } }
+		"0000000000000000000000000000000000000001": { "balance": "1", "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
+		"0000000000000000000000000000000000000002": { "balance": "1", "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
+		"0000000000000000000000000000000000000003": { "balance": "1", "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
+		"0000000000000000000000000000000000000004": { "balance": "1", "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } }
 	}
 }

ethcore/res/ethereum/morden.json

@@ -1,24 +1,32 @@
 {
 	"name": "Morden",
-	"engineName": "Ethash",
+	"engine": {
+		"Ethash": {
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"minimumDifficulty": "0x020000",
+				"difficultyBoundDivisor": "0x0800",
+				"durationLimit": "0x0d",
+				"blockReward": "0x4563918244F40000",
+				"registrar": "",
+				"frontierCompatibilityModeLimit": "0x789b0"
+			}
+		}
+	},
 	"params": {
 		"accountStartNonce": "0x0100000",
-		"frontierCompatibilityModeLimit": "0x789b0",
 		"maximumExtraDataSize": "0x20",
-		"tieBreakingGas": false,
 		"minGasLimit": "0x1388",
-		"gasLimitBoundDivisor": "0x0400",
-		"minimumDifficulty": "0x020000",
-		"difficultyBoundDivisor": "0x0800",
-		"durationLimit": "0x0d",
-		"blockReward": "0x4563918244F40000",
-		"registrar": "",
 		"networkID" : "0x2"
 	},
 	"genesis": {
-		"nonce": "0x00006d6f7264656e",
+		"seal": {
+			"ethereum": {
+				"nonce": "0x00006d6f7264656e",
+				"mixHash": "0x00000000000000000000000000000000000000647572616c65787365646c6578"
+			}
+		},
 		"difficulty": "0x20000",
-		"mixHash": "0x00000000000000000000000000000000000000647572616c65787365646c6578",
 		"author": "0x0000000000000000000000000000000000000000",
 		"timestamp": "0x00",
 		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
@@ -26,13 +34,14 @@
 		"gasLimit": "0x2fefd8"
 	},
 	"nodes": [
-		"enode://b1217cbaa440e35ed471157123fe468e19e8b5ad5bedb4b1fdbcbdab6fb2f5ed3e95dd9c24a22a79fdb2352204cea207df27d92bfd21bfd41545e8b16f637499@104.44.138.37:30303"
+		"enode://e731347db0521f3476e6bbbb83375dcd7133a1601425ebd15fd10f3835fd4c304fba6282087ca5a0deeafadf0aa0d4fd56c3323331901c1f38bd181c283e3e35@128.199.55.137:30303",
+		"enode://ceb5c0f85eb994dbe9693bf46d99b03f6b838d17cc74e68d5eb003171ff39e5f120b17f965b267c319303f94d80b9d994b77062fb1486d76ce95d9f3d8fe1cb4@46.101.122.141:30303"
 	],
 	"accounts": {
-		"0000000000000000000000000000000000000001": { "balance": "1", "nonce": "1048576", "builtin": { "name": "ecrecover", "linear": { "base": 3000, "word": 0 } } },
-		"0000000000000000000000000000000000000002": { "balance": "1", "nonce": "1048576", "builtin": { "name": "sha256", "linear": { "base": 60, "word": 12 } } },
-		"0000000000000000000000000000000000000003": { "balance": "1", "nonce": "1048576", "builtin": { "name": "ripemd160", "linear": { "base": 600, "word": 120 } } },
-		"0000000000000000000000000000000000000004": { "balance": "1", "nonce": "1048576", "builtin": { "name": "identity", "linear": { "base": 15, "word": 3 } } },
+		"0000000000000000000000000000000000000001": { "balance": "1", "nonce": "1048576", "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
+		"0000000000000000000000000000000000000002": { "balance": "1", "nonce": "1048576", "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
+		"0000000000000000000000000000000000000003": { "balance": "1", "nonce": "1048576", "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
+		"0000000000000000000000000000000000000004": { "balance": "1", "nonce": "1048576", "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } },
 		"102e61f5d8f9bc71d0ad4a084df4e65e05ce0e1c": { "balance": "1606938044258990275541962092341162602522202993782792835301376", "nonce": "1048576" }
 	}
 }

ethcore/res/ethereum/olympic.json

@@ -1,24 +1,31 @@
 {
 	"name": "Olympic",
-	"engineName": "Ethash",
+	"engine": {
+		"Ethash": {
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"minimumDifficulty": "0x020000",
+				"difficultyBoundDivisor": "0x0800",
+				"durationLimit": "0x08",
+				"blockReward": "0x14D1120D7B160000",
+				"registrar": "5e70c0bbcd5636e0f9f9316e9f8633feb64d4050"
+			}
+		}
+	},
 	"params": {
 		"accountStartNonce": "0x00",
-		"frontierCompatibilityModeLimit": "0xffffffffffffffff",
 		"maximumExtraDataSize": "0x0400",
-		"tieBreakingGas": false,
 		"minGasLimit": "125000",
-		"gasLimitBoundDivisor": "0x0400",
-		"minimumDifficulty": "0x020000",
-		"difficultyBoundDivisor": "0x0800",
-		"durationLimit": "0x08",
-		"blockReward": "0x14D1120D7B160000",
-		"registrar": "5e70c0bbcd5636e0f9f9316e9f8633feb64d4050",
 		"networkID" : "0x0"
 	},
 	"genesis": {
-		"nonce": "0x000000000000002a",
+		"seal": {
+			"ethereum": {
+				"nonce": "0x000000000000002a",
+				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
+			}
+		},
 		"difficulty": "0x20000",
-		"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
 		"author": "0x0000000000000000000000000000000000000000",
 		"timestamp": "0x00",
 		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
@@ -26,10 +33,10 @@
 		"gasLimit": "0x2fefd8"
 	},
 	"accounts": {
-		"0000000000000000000000000000000000000001": { "balance": "1", "builtin": { "name": "ecrecover", "linear": { "base": 3000, "word": 0 } } },
-		"0000000000000000000000000000000000000002": { "balance": "1", "builtin": { "name": "sha256", "linear": { "base": 60, "word": 12 } } },
-		"0000000000000000000000000000000000000003": { "balance": "1", "builtin": { "name": "ripemd160", "linear": { "base": 600, "word": 120 } } },
-		"0000000000000000000000000000000000000004": { "balance": "1", "builtin": { "name": "identity", "linear": { "base": 15, "word": 3 } } },
+		"0000000000000000000000000000000000000001": { "balance": "1", "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
+		"0000000000000000000000000000000000000002": { "balance": "1", "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
+		"0000000000000000000000000000000000000003": { "balance": "1", "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
+		"0000000000000000000000000000000000000004": { "balance": "1", "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } },
 		"dbdbdb2cbd23b783741e8d7fcf51e459b497e4a6": { "balance": "1606938044258990275541962092341162602522202993782792835301376" },
 		"e6716f9544a56c530d868e4bfbacb172315bdead": { "balance": "1606938044258990275541962092341162602522202993782792835301376" },
 		"b9c015918bdaba24b4ff057a92a3873d6eb201be": { "balance": "1606938044258990275541962092341162602522202993782792835301376" },

ethcore/res/null.json

@@ -0,0 +1,33 @@
+{
+	"name": "Morden",
+	"engine": {
+		"Null": null
+	},
+	"params": {
+		"accountStartNonce": "0x0",
+		"maximumExtraDataSize": "0x20",
+		"minGasLimit": "0x1388",
+		"networkID" : "0x2"
+	},
+	"genesis": {
+		"seal": {
+			"ethereum": {
+				"nonce": "0x00006d6f7264656e",
+				"mixHash": "0x00000000000000000000000000000000000000647572616c65787365646c6578"
+			}
+		},
+		"difficulty": "0x20000",
+		"author": "0x0000000000000000000000000000000000000000",
+		"timestamp": "0x00",
+		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+		"extraData": "0x",
+		"gasLimit": "0x2fefd8"
+	},
+	"accounts": {
+		"0000000000000000000000000000000000000001": { "balance": "1", "nonce": "0", "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
+		"0000000000000000000000000000000000000002": { "balance": "1", "nonce": "0", "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
+		"0000000000000000000000000000000000000003": { "balance": "1", "nonce": "0", "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
+		"0000000000000000000000000000000000000004": { "balance": "1", "nonce": "0", "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } },
+		"9cce34f7ab185c7aba1b7c8140d620b4bda941d6": { "balance": "1606938044258990275541962092341162602522202993782792835301376", "nonce": "0" }
+	}
+}

ethcore/res/null_morden.json

@@ -1,24 +1,22 @@
 {
 	"name": "Morden",
-	"engineName": "NullEngine",
+	"engine": {
+		"Null": null
+	},
 	"params": {
 		"accountStartNonce": "0x0100000",
-		"frontierCompatibilityModeLimit": "0xfffa2990",
 		"maximumExtraDataSize": "0x20",
-		"tieBreakingGas": false,
 		"minGasLimit": "0x1388",
-		"gasLimitBoundDivisor": "0x0400",
-		"minimumDifficulty": "0x020000",
-		"difficultyBoundDivisor": "0x0800",
-		"durationLimit": "0x0d",
-		"blockReward": "0x4563918244F40000",
-		"registrar": "",
 		"networkID" : "0x2"
 	},
 	"genesis": {
-		"nonce": "0x00006d6f7264656e",
+		"seal": {
+			"ethereum": {
+				"nonce": "0x00006d6f7264656e",
+				"mixHash": "0x00000000000000000000000000000000000000647572616c65787365646c6578"
+			}
+		},
 		"difficulty": "0x20000",
-		"mixHash": "0x00000000000000000000000000000000000000647572616c65787365646c6578",
 		"author": "0x0000000000000000000000000000000000000000",
 		"timestamp": "0x00",
 		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
@@ -26,10 +24,10 @@
 		"gasLimit": "0x2fefd8"
 	},
 	"accounts": {
-		"0000000000000000000000000000000000000001": { "balance": "1", "nonce": "1048576", "builtin": { "name": "ecrecover", "linear": { "base": 3000, "word": 0 } } },
-		"0000000000000000000000000000000000000002": { "balance": "1", "nonce": "1048576", "builtin": { "name": "sha256", "linear": { "base": 60, "word": 12 } } },
-		"0000000000000000000000000000000000000003": { "balance": "1", "nonce": "1048576", "builtin": { "name": "ripemd160", "linear": { "base": 600, "word": 120 } } },
-		"0000000000000000000000000000000000000004": { "balance": "1", "nonce": "1048576", "builtin": { "name": "identity", "linear": { "base": 15, "word": 3 } } },
+		"0000000000000000000000000000000000000001": { "balance": "1", "nonce": "1048576", "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
+		"0000000000000000000000000000000000000002": { "balance": "1", "nonce": "1048576", "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
+		"0000000000000000000000000000000000000003": { "balance": "1", "nonce": "1048576", "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
+		"0000000000000000000000000000000000000004": { "balance": "1", "nonce": "1048576", "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } },
 		"102e61f5d8f9bc71d0ad4a084df4e65e05ce0e1c": { "balance": "1606938044258990275541962092341162602522202993782792835301376", "nonce": "1048576" }
 	}
 }

ethcore/res/test_authority.json

@@ -0,0 +1,39 @@
+{
+	"name": "TestAuthority",
+	"engine": {
+		"BasicAuthority": {
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"durationLimit": "0x0d",
+				"authorities" : ["0x9cce34f7ab185c7aba1b7c8140d620b4bda941d6"]
+			}
+		}
+	},
+	"params": {
+		"accountStartNonce": "0x0100000",
+		"maximumExtraDataSize": "0x20",
+		"minGasLimit": "0x1388",
+		"networkID" : "0x69"
+	},
+	"genesis": {
+		"seal": {
+			"generic": {
+				"fields": 1,
+				"rlp": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa"
+			}
+		},
+		"difficulty": "0x20000",
+		"author": "0x0000000000000000000000000000000000000000",
+		"timestamp": "0x00",
+		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+		"extraData": "0x",
+		"gasLimit": "0x2fefd8"
+	},
+	"accounts": {
+		"0000000000000000000000000000000000000001": { "balance": "1", "nonce": "1048576", "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
+		"0000000000000000000000000000000000000002": { "balance": "1", "nonce": "1048576", "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
+		"0000000000000000000000000000000000000003": { "balance": "1", "nonce": "1048576", "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
+		"0000000000000000000000000000000000000004": { "balance": "1", "nonce": "1048576", "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } },
+		"9cce34f7ab185c7aba1b7c8140d620b4bda941d6": { "balance": "1606938044258990275541962092341162602522202993782792835301376", "nonce": "1048576" }
+	}
+}

ethcore/src/account.rs

@@ -51,8 +51,6 @@ impl Account {
 		}
 	}
 
-	#[cfg(test)]
-	#[cfg(feature = "json-tests")]
 	/// General constructor.
 	pub fn from_pod(pod: PodAccount) -> Account {
 		Account {
@@ -60,8 +58,8 @@ impl Account {
 			nonce: pod.nonce,
 			storage_root: SHA3_NULL_RLP,
 			storage_overlay: RefCell::new(pod.storage.into_iter().map(|(k, v)| (k, (Filth::Dirty, v))).collect()),
-			code_hash: Some(pod.code.sha3()),
-			code_cache: pod.code
+			code_hash: pod.code.as_ref().map(|c| c.sha3()),
+			code_cache: pod.code.as_ref().map_or_else(|| { warn!("POD account with unknown code is being created! Assuming no code."); vec![] }, |c| c.clone()),
 		}
 	}
 
@@ -110,6 +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));
@@ -118,7 +122,12 @@ impl Account {
 	/// Get (and cache) the contents of the trie's storage at `key`.
 	pub fn storage_at(&self, db: &AccountDB, key: &H256) -> H256 {
 		self.storage_overlay.borrow_mut().entry(key.clone()).or_insert_with(||{
-			(Filth::Clean, H256::from(SecTrieDB::new(db, &self.storage_root).get(key.bytes()).map_or(U256::zero(), |v| -> U256 {decode(v)})))
+			let db = SecTrieDB::new(db, &self.storage_root)
+				.expect("Account storage_root initially set to zero (valid) and only altered by SecTrieDBMut. \
+				SecTrieDBMut would not set it to an invalid state root. Therefore the root is valid and DB creation \
+				using it will not fail.");
+
+			(Filth::Clean, H256::from(db.get(key.bytes()).map_or(U256::zero(), |v| -> U256 {decode(v)})))
 		}).1.clone()
 	}
 
@@ -138,7 +147,7 @@ impl Account {
 	/// get someone who knows to call `note_code`.
 	pub fn code(&self) -> Option<&[u8]> {
 		match self.code_hash {
-			Some(SHA3_EMPTY) | None if self.code_cache.is_empty() => Some(&self.code_cache),
+			Some(c) if c == SHA3_EMPTY && self.code_cache.is_empty() => Some(&self.code_cache),
 			Some(_) if !self.code_cache.is_empty() => Some(&self.code_cache),
 			None => Some(&self.code_cache),
 			_ => None,
@@ -163,16 +172,16 @@ impl Account {
 		!self.code_cache.is_empty() || (self.code_cache.is_empty() && self.code_hash == Some(SHA3_EMPTY))
 	}
 
-	/// Provide a database to lookup `code_hash`. Should not be called if it is a contract without code.
+	/// Provide a database to get `code_hash`. Should not be called if it is a contract without code.
 	pub fn cache_code(&mut self, db: &AccountDB) -> bool {
 		// TODO: fill out self.code_cache;
 		trace!("Account::cache_code: ic={}; self.code_hash={:?}, self.code_cache={}", self.is_cached(), self.code_hash, self.code_cache.pretty());
 		self.is_cached() ||
 			match self.code_hash {
-				Some(ref h) => match db.lookup(h) {
+				Some(ref h) => match db.get(h) {
 					Some(x) => { self.code_cache = x.to_vec(); true },
 					_ => {
-						warn!("Failed reverse lookup of {}", h);
+						warn!("Failed reverse get of {}", h);
 						false
 					},
 				},
@@ -206,7 +215,10 @@ impl Account {
 
 	/// Commit the `storage_overlay` to the backing DB and update `storage_root`.
 	pub fn commit_storage(&mut self, db: &mut AccountDBMut) {
-		let mut t = SecTrieDBMut::from_existing(db, &mut self.storage_root);
+		let mut t = SecTrieDBMut::from_existing(db, &mut self.storage_root)
+			.expect("Account storage_root initially set to zero (valid) and only altered by SecTrieDBMut. \
+				SecTrieDBMut would not set it to an invalid state root. Therefore the root is valid and DB creation \
+				using it will not fail.");
 		for (k, &mut (ref mut f, ref mut v)) in self.storage_overlay.borrow_mut().iter_mut() {
 			if f == &Filth::Dirty {
 				// cast key and value to trait type,
@@ -261,7 +273,7 @@ mod tests {
 		let mut db = MemoryDB::new();
 		let mut db = AccountDBMut::new(&mut db, &Address::new());
 		let rlp = {
-			let mut a = Account::new_contract(x!(69), x!(0));
+			let mut a = Account::new_contract(69.into(), 0.into());
 			a.set_storage(H256::from(&U256::from(0x00u64)), H256::from(&U256::from(0x1234u64)));
 			a.commit_storage(&mut db);
 			a.init_code(vec![]);
@@ -281,7 +293,7 @@ mod tests {
 		let mut db = AccountDBMut::new(&mut db, &Address::new());
 
 		let rlp = {
-			let mut a = Account::new_contract(x!(69), x!(0));
+			let mut a = Account::new_contract(69.into(), 0.into());
 			a.init_code(vec![0x55, 0x44, 0xffu8]);
 			a.commit_code(&mut db);
 			a.rlp()
@@ -296,10 +308,10 @@ mod tests {
 
 	#[test]
 	fn commit_storage() {
-		let mut a = Account::new_contract(x!(69), x!(0));
+		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.set_storage(x!(0), x!(0x1234));
+		a.set_storage(0.into(), 0x1234.into());
 		assert_eq!(a.storage_root(), None);
 		a.commit_storage(&mut db);
 		assert_eq!(a.storage_root().unwrap().hex(), "c57e1afb758b07f8d2c8f13a3b6e44fa5ff94ab266facc5a4fd3f062426e50b2");
@@ -307,21 +319,21 @@ mod tests {
 
 	#[test]
 	fn commit_remove_commit_storage() {
-		let mut a = Account::new_contract(x!(69), x!(0));
+		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.set_storage(x!(0), x!(0x1234));
+		a.set_storage(0.into(), 0x1234.into());
 		a.commit_storage(&mut db);
-		a.set_storage(x!(1), x!(0x1234));
+		a.set_storage(1.into(), 0x1234.into());
 		a.commit_storage(&mut db);
-		a.set_storage(x!(1), x!(0));
+		a.set_storage(1.into(), 0.into());
 		a.commit_storage(&mut db);
 		assert_eq!(a.storage_root().unwrap().hex(), "c57e1afb758b07f8d2c8f13a3b6e44fa5ff94ab266facc5a4fd3f062426e50b2");
 	}
 
 	#[test]
 	fn commit_code() {
-		let mut a = Account::new_contract(x!(69), x!(0));
+		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]);
@@ -330,6 +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());
@@ -342,8 +369,6 @@ mod tests {
 
 	#[test]
 	fn new_account() {
-		use rustc_serialize::hex::ToHex;
-
 		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));
@@ -354,8 +379,6 @@ mod tests {
 
 	#[test]
 	fn create_account() {
-		use rustc_serialize::hex::ToHex;
-
 		let a = Account::new(U256::from(69u8), U256::from(0u8), HashMap::new(), Bytes::new());
 		assert_eq!(a.rlp().to_hex(), "f8448045a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421a0c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470");
 	}

ethcore/src/account_db.rs

@@ -20,7 +20,7 @@ impl<'db> AccountDB<'db> {
 	pub fn new(db: &'db HashDB, address: &Address) -> AccountDB<'db> {
 		AccountDB {
 			db: db,
-			address: x!(address),
+			address: address.into(),
 		}
 	}
 }
@@ -30,18 +30,18 @@ impl<'db> HashDB for AccountDB<'db>{
 		unimplemented!()
 	}
 
-	fn lookup(&self, key: &H256) -> Option<&[u8]> {
+	fn get(&self, key: &H256) -> Option<&[u8]> {
 		if key == &SHA3_NULL_RLP {
 			return Some(&NULL_RLP_STATIC);
 		}
-		self.db.lookup(&combine_key(&self.address, key))
+		self.db.get(&combine_key(&self.address, key))
 	}
 
-	fn exists(&self, key: &H256) -> bool {
+	fn contains(&self, key: &H256) -> bool {
 		if key == &SHA3_NULL_RLP {
 			return true;
 		}
-		self.db.exists(&combine_key(&self.address, key))
+		self.db.contains(&combine_key(&self.address, key))
 	}
 
 	fn insert(&mut self, _value: &[u8]) -> H256 {
@@ -52,7 +52,7 @@ impl<'db> HashDB for AccountDB<'db>{
 		unimplemented!()
 	}
 
-	fn kill(&mut self, _key: &H256) {
+	fn remove(&mut self, _key: &H256) {
 		unimplemented!()
 	}
 }
@@ -67,7 +67,7 @@ impl<'db> AccountDBMut<'db> {
 	pub fn new(db: &'db mut HashDB, address: &Address) -> AccountDBMut<'db> {
 		AccountDBMut {
 			db: db,
-			address: x!(address),
+			address: address.into(),
 		}
 	}
 
@@ -82,18 +82,18 @@ impl<'db> HashDB for AccountDBMut<'db>{
 		unimplemented!()
 	}
 
-	fn lookup(&self, key: &H256) -> Option<&[u8]> {
+	fn get(&self, key: &H256) -> Option<&[u8]> {
 		if key == &SHA3_NULL_RLP {
 			return Some(&NULL_RLP_STATIC);
 		}
-		self.db.lookup(&combine_key(&self.address, key))
+		self.db.get(&combine_key(&self.address, key))
 	}
 
-	fn exists(&self, key: &H256) -> bool {
+	fn contains(&self, key: &H256) -> bool {
 		if key == &SHA3_NULL_RLP {
 			return true;
 		}
-		self.db.exists(&combine_key(&self.address, key))
+		self.db.contains(&combine_key(&self.address, key))
 	}
 
 	fn insert(&mut self, value: &[u8]) -> H256 {
@@ -114,12 +114,12 @@ impl<'db> HashDB for AccountDBMut<'db>{
 		self.db.emplace(key, value.to_vec())
 	}
 
-	fn kill(&mut self, key: &H256) {
+	fn remove(&mut self, key: &H256) {
 		if key == &SHA3_NULL_RLP {
 			return;
 		}
 		let key = combine_key(&self.address, key);
-		self.db.kill(&key)
+		self.db.remove(&key)
 	}
 }
 

ethcore/src/account_provider.rs

@@ -0,0 +1,272 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Account management.
+
+use std::fmt;
+use std::sync::RwLock;
+use std::collections::HashMap;
+use util::{Address as H160, H256, H520};
+use ethstore::{SecretStore, Error as SSError, SafeAccount, EthStore};
+use ethstore::dir::{KeyDirectory};
+use ethstore::ethkey::{Address as SSAddress, Message as SSMessage, Secret as SSSecret, Random, Generator};
+
+/// Type of unlock.
+#[derive(Clone)]
+enum Unlock {
+	/// If account is unlocked temporarily, it should be locked after first usage.
+	Temp,
+	/// Account unlocked permantently can always sign message.
+	/// Use with caution.
+	Perm,
+}
+
+/// Data associated with account.
+#[derive(Clone)]
+struct AccountData {
+	unlock: Unlock,
+	password: String,
+}
+
+/// `AccountProvider` errors.
+#[derive(Debug)]
+pub enum Error {
+	/// Returned when account is not unlocked.
+	NotUnlocked,
+	/// Returned when signing fails.
+	SStore(SSError),
+}
+
+impl fmt::Display for Error {
+	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+		match *self {
+			Error::NotUnlocked => write!(f, "Account is locked"),
+			Error::SStore(ref e) => write!(f, "{}", e),
+		}
+	}
+}
+
+impl From<SSError> for Error {
+	fn from(e: SSError) -> Self {
+		Error::SStore(e)
+	}
+}
+
+macro_rules! impl_bridge_type {
+	($name: ident, $size: expr, $core: ident, $store: ident) => {
+		/// Primitive
+		pub struct $name([u8; $size]);
+
+		impl From<[u8; $size]> for $name {
+			fn from(s: [u8; $size]) -> Self {
+				$name(s)
+			}
+		}
+
+		impl From<$core> for $name {
+			fn from(s: $core) -> Self {
+				$name(s.0)
+			}
+		}
+
+		impl From<$store> for $name {
+			fn from(s: $store) -> Self {
+				$name(s.into())
+			}
+		}
+
+		impl Into<$core> for $name {
+			fn into(self) -> $core {
+				$core(self.0)
+			}
+		}
+
+		impl Into<$store> for $name {
+			fn into(self) -> $store {
+				$store::from(self.0)
+			}
+		}
+	}
+}
+
+impl_bridge_type!(Secret, 32, H256, SSSecret);
+impl_bridge_type!(Message, 32, H256, SSMessage);
+impl_bridge_type!(Address, 20, H160, SSAddress);
+
+
+struct NullDir;
+
+impl KeyDirectory for NullDir {
+	fn load(&self) -> Result<Vec<SafeAccount>, SSError> {
+		Ok(vec![])
+	}
+
+	fn insert(&self, _account: SafeAccount) -> Result<(), SSError> {
+		Ok(())
+	}
+
+	fn remove(&self, _address: &SSAddress) -> Result<(), SSError> {
+		Ok(())
+	}
+}
+
+/// Account management.
+/// Responsible for unlocking accounts.
+pub struct AccountProvider {
+	unlocked: RwLock<HashMap<SSAddress, AccountData>>,
+	sstore: Box<SecretStore>,
+}
+
+impl AccountProvider {
+	/// Creates new account provider.
+	pub fn new(sstore: Box<SecretStore>) -> Self {
+		AccountProvider {
+			unlocked: RwLock::new(HashMap::new()),
+			sstore: sstore,
+		}
+	}
+
+	/// Creates not disk backed provider.
+	pub fn transient_provider() -> Self {
+		AccountProvider {
+			unlocked: RwLock::new(HashMap::new()),
+			sstore: Box::new(EthStore::open(Box::new(NullDir)).unwrap())
+		}
+	}
+
+	/// Creates new random account.
+	pub fn new_account(&self, password: &str) -> Result<H160, Error> {
+		let secret = Random.generate().unwrap().secret().clone();
+		let address = try!(self.sstore.insert_account(secret, password));
+		Ok(Address::from(address).into())
+	}
+
+	/// Inserts new account into underlying store.
+	/// Does not unlock account!
+	pub fn insert_account<S>(&self, secret: S, password: &str) -> Result<H160, Error> where Secret: From<S> {
+		let s = Secret::from(secret);
+		let address = try!(self.sstore.insert_account(s.into(), password));
+		Ok(Address::from(address).into())
+	}
+
+	/// Returns addresses of all accounts.
+	pub fn accounts(&self) -> Vec<H160> {
+		self.sstore.accounts().into_iter().map(|a| H160(a.into())).collect()
+	}
+
+	/// Helper method used for unlocking accounts.
+	fn unlock_account<A>(&self, account: A, password: String, unlock: Unlock) -> Result<(), Error> where Address: From<A> {
+		let a = Address::from(account);
+		let account = a.into();
+		// verify password by signing dump message
+		// result may be discarded
+		let _ = try!(self.sstore.sign(&account, &password, &Default::default()));
+
+		// check if account is already unlocked pernamently, if it is, do nothing
+		{
+			let unlocked = self.unlocked.read().unwrap();
+			if let Some(data) = unlocked.get(&account) {
+				if let Unlock::Perm = data.unlock {
+					return Ok(())
+				}
+			}
+		}
+
+		let data = AccountData {
+			unlock: unlock,
+			password: password,
+		};
+
+		let mut unlocked = self.unlocked.write().unwrap();
+		unlocked.insert(account, data);
+		Ok(())
+	}
+
+	/// Unlocks account permanently.
+	pub fn unlock_account_permanently<A>(&self, account: A, password: String) -> Result<(), Error> where Address: From<A> {
+		self.unlock_account(account, password, Unlock::Perm)
+	}
+
+	/// Unlocks account temporarily (for one signing).
+	pub fn unlock_account_temporarily<A>(&self, account: A, password: String) -> Result<(), Error> where Address: From<A> {
+		self.unlock_account(account, password, Unlock::Temp)
+	}
+
+	/// Checks if given account is unlocked
+	pub fn is_unlocked<A>(&self, account: A) -> bool where Address: From<A> {
+		let account = Address::from(account).into();
+		let unlocked = self.unlocked.read().unwrap();
+		unlocked.get(&account).is_some()
+	}
+
+	/// Signs the message. Account must be unlocked.
+	pub fn sign<A, M>(&self, account: A, message: M) -> Result<H520, Error> where Address: From<A>, Message: From<M> {
+		let account = Address::from(account).into();
+		let message = Message::from(message).into();
+
+		let data = {
+			let unlocked = self.unlocked.read().unwrap();
+			try!(unlocked.get(&account).ok_or(Error::NotUnlocked)).clone()
+		};
+
+		if let Unlock::Temp = data.unlock {
+			let mut unlocked = self.unlocked.write().unwrap();
+			unlocked.remove(&account).expect("data exists: so key must exist: qed");
+		}
+
+		let signature = try!(self.sstore.sign(&account, &data.password, &message));
+		Ok(H520(signature.into()))
+	}
+
+	/// Unlocks an account, signs the message, and locks it again.
+	pub fn sign_with_password<A, M>(&self, account: A, password: String, message: M) -> Result<H520, Error> where Address: From<A>, Message: From<M> {
+		let account = Address::from(account).into();
+		let message = Message::from(message).into();
+		let signature = try!(self.sstore.sign(&account, &password, &message));
+		Ok(H520(signature.into()))
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use super::AccountProvider;
+	use ethstore::ethkey::{Generator, Random};
+
+	#[test]
+	fn unlock_account_temp() {
+		let kp = Random.generate().unwrap();
+		let ap = AccountProvider::transient_provider();
+		assert!(ap.insert_account(kp.secret().clone(), "test").is_ok());
+		assert!(ap.unlock_account_temporarily(kp.address(), "test1".into()).is_err());
+		assert!(ap.unlock_account_temporarily(kp.address(), "test".into()).is_ok());
+		assert!(ap.sign(kp.address(), [0u8; 32]).is_ok());
+		assert!(ap.sign(kp.address(), [0u8; 32]).is_err());
+	}
+
+	#[test]
+	fn unlock_account_perm() {
+		let kp = Random.generate().unwrap();
+		let ap = AccountProvider::transient_provider();
+		assert!(ap.insert_account(kp.secret().clone(), "test").is_ok());
+		assert!(ap.unlock_account_permanently(kp.address(), "test1".into()).is_err());
+		assert!(ap.unlock_account_permanently(kp.address(), "test".into()).is_ok());
+		assert!(ap.sign(kp.address(), [0u8; 32]).is_ok());
+		assert!(ap.sign(kp.address(), [0u8; 32]).is_ok());
+		assert!(ap.unlock_account_temporarily(kp.address(), "test".into()).is_ok());
+		assert!(ap.sign(kp.address(), [0u8; 32]).is_ok());
+		assert!(ap.sign(kp.address(), [0u8; 32]).is_ok());
+	}
+}

ethcore/src/action_params.rs

@@ -16,6 +16,8 @@
 
 //! Evm input params.
 use common::*;
+use ethjson;
+use types::executed::CallType;
 
 /// Transaction value
 #[derive(Clone, Debug)]
@@ -26,6 +28,15 @@ pub enum ActionValue {
 	Apparent(U256)
 }
 
+impl ActionValue {
+	/// Returns action value as U256.
+	pub fn value(&self) -> U256 {
+		match *self {
+			ActionValue::Transfer(x) | ActionValue::Apparent(x) => x
+		}
+	}
+}
+
 // TODO: should be a trait, possible to avoid cloning everything from a Transaction(/View).
 /// Action (call/create) input params. Everything else should be specified in Externalities.
 #[derive(Clone, Debug)]
@@ -48,7 +59,10 @@ pub struct ActionParams {
 	/// Code being executed.
 	pub code: Option<Bytes>,
 	/// Input data.
-	pub data: Option<Bytes>
+	pub data: Option<Bytes>,
+	/// Type of call
+	pub call_type: CallType,
+
 }
 
 impl Default for ActionParams {
@@ -63,7 +77,26 @@ impl Default for ActionParams {
 			gas_price: U256::zero(),
 			value: ActionValue::Transfer(U256::zero()),
 			code: None,
-			data: None
+			data: None,
+			call_type: CallType::None,
+		}
+	}
+}
+
+impl From<ethjson::vm::Transaction> for ActionParams {
+	fn from(t: ethjson::vm::Transaction) -> Self {
+		let address: Address = t.address.into();
+		ActionParams {
+			code_address: Address::new(),
+			address: address,
+			sender: t.sender.into(),
+			origin: t.origin.into(),
+			code: Some(t.code.into()),
+			data: Some(t.data.into()),
+			gas: t.gas.into(),
+			gas_price: t.gas_price.into(),
+			value: ActionValue::Transfer(t.value.into()),
+			call_type: match address.is_zero() { true => CallType::None, false => CallType::Call },	// TODO @debris is this correct?
 		}
 	}
 }

ethcore/src/basic_authority.rs

@@ -0,0 +1,261 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+//! A blockchain engine that supports a basic, non-BFT proof-of-authority.
+
+use common::*;
+use account_provider::AccountProvider;
+use block::*;
+use spec::{CommonParams, Spec};
+use engine::*;
+use evm::Schedule;
+use ethjson;
+
+/// `BasicAuthority` params.
+#[derive(Debug, PartialEq)]
+pub struct BasicAuthorityParams {
+	/// Gas limit divisor.
+	pub gas_limit_bound_divisor: U256,
+	/// Block duration.
+	pub duration_limit: u64,
+	/// Valid signatories.
+	pub authorities: HashSet<Address>,
+}
+
+impl From<ethjson::spec::BasicAuthorityParams> for BasicAuthorityParams {
+	fn from(p: ethjson::spec::BasicAuthorityParams) -> Self {
+		BasicAuthorityParams {
+			gas_limit_bound_divisor: p.gas_limit_bound_divisor.into(),
+			duration_limit: p.duration_limit.into(),
+			authorities: p.authorities.into_iter().map(Into::into).collect::<HashSet<_>>(),
+		}
+	}
+}
+
+/// Engine using `BasicAuthority` proof-of-work consensus algorithm, suitable for Ethereum
+/// mainnet chains in the Olympic, Frontier and Homestead eras.
+pub struct BasicAuthority {
+	params: CommonParams,
+	our_params: BasicAuthorityParams,
+	builtins: BTreeMap<Address, Builtin>,
+}
+
+impl BasicAuthority {
+	/// Create a new instance of BasicAuthority engine
+	pub fn new(params: CommonParams, our_params: BasicAuthorityParams, builtins: BTreeMap<Address, Builtin>) -> Self {
+		BasicAuthority {
+			params: params,
+			our_params: our_params,
+			builtins: builtins,
+		}
+	}
+}
+
+impl Engine for BasicAuthority {
+	fn name(&self) -> &str { "BasicAuthority" }
+	fn version(&self) -> SemanticVersion { SemanticVersion::new(1, 0, 0) }
+	// One field - the signature
+	fn seal_fields(&self) -> usize { 1 }
+
+	fn params(&self) -> &CommonParams { &self.params }
+	fn builtins(&self) -> &BTreeMap<Address, Builtin> { &self.builtins }
+
+	/// Additional engine-specific information for the user/developer concerning `header`.
+	fn extra_info(&self, _header: &Header) -> HashMap<String, String> { hash_map!["signature".to_owned() => "TODO".to_owned()] }
+
+	fn schedule(&self, _env_info: &EnvInfo) -> Schedule {
+		Schedule::new_homestead()
+	}
+
+	fn populate_from_parent(&self, header: &mut Header, parent: &Header, gas_floor_target: U256, _gas_ceil_target: U256) {
+		header.difficulty = parent.difficulty;
+		header.gas_limit = {
+			let gas_limit = parent.gas_limit;
+			let bound_divisor = self.our_params.gas_limit_bound_divisor;
+			if gas_limit < gas_floor_target {
+				min(gas_floor_target, gas_limit + gas_limit / bound_divisor - 1.into())
+			} else {
+				max(gas_floor_target, gas_limit - gas_limit / bound_divisor + 1.into())
+			}
+		};
+		header.note_dirty();
+//		info!("ethash: populate_from_parent #{}: difficulty={} and gas_limit={}", header.number, header.difficulty, header.gas_limit);
+	}
+
+	/// Apply the block reward on finalisation of the block.
+	/// This assumes that all uncles are valid uncles (i.e. of at least one generation before the current).
+	fn on_close_block(&self, _block: &mut ExecutedBlock) {}
+
+	/// Attempt to seal the block internally.
+	///
+	/// This operation is synchronous and may (quite reasonably) not be available, in which `false` will
+	/// be returned.
+	fn generate_seal(&self, block: &ExecutedBlock, accounts: Option<&AccountProvider>) -> Option<Vec<Bytes>> {
+		if let Some(ap) = accounts {
+			let header = block.header();
+			let message = header.bare_hash();
+			// account should be pernamently unlocked, otherwise sealing will fail
+			if let Ok(signature) = ap.sign(*block.header().author(), message) {
+				return Some(vec![encode(&signature).to_vec()]);
+			} else {
+				trace!(target: "basicauthority", "generate_seal: FAIL: accounts secret key unavailable");
+			}
+		} else {
+			trace!(target: "basicauthority", "generate_seal: FAIL: accounts not provided");
+		}
+		None
+	}
+
+	fn verify_block_basic(&self, header: &Header, _block: Option<&[u8]>) -> result::Result<(), Error> {
+		// check the seal fields.
+		// TODO: pull this out into common code.
+		if header.seal.len() != self.seal_fields() {
+			return Err(From::from(BlockError::InvalidSealArity(
+				Mismatch { expected: self.seal_fields(), found: header.seal.len() }
+			)));
+		}
+		Ok(())
+	}
+
+	fn verify_block_unordered(&self, header: &Header, _block: Option<&[u8]>) -> result::Result<(), Error> {
+		// check the signature is legit.
+		let sig = try!(UntrustedRlp::new(&header.seal[0]).as_val::<H520>());
+		let signer = Address::from(try!(ec::recover(&sig, &header.bare_hash())).sha3());
+		if !self.our_params.authorities.contains(&signer) {
+			return try!(Err(BlockError::InvalidSeal));
+		}
+		Ok(())
+	}
+
+	fn verify_block_family(&self, header: &Header, parent: &Header, _block: Option<&[u8]>) -> result::Result<(), Error> {
+		// we should not calculate difficulty for genesis blocks
+		if header.number() == 0 {
+			return Err(From::from(BlockError::RidiculousNumber(OutOfBounds { min: Some(1), max: None, found: header.number() })));
+		}
+
+		// Check difficulty is correct given the two timestamps.
+		if header.difficulty() != parent.difficulty() {
+			return Err(From::from(BlockError::InvalidDifficulty(Mismatch { expected: *parent.difficulty(), found: *header.difficulty() })))
+		}
+		let gas_limit_divisor = self.our_params.gas_limit_bound_divisor;
+		let min_gas = parent.gas_limit - parent.gas_limit / gas_limit_divisor;
+		let max_gas = parent.gas_limit + parent.gas_limit / gas_limit_divisor;
+		if header.gas_limit <= min_gas || header.gas_limit >= max_gas {
+			return Err(From::from(BlockError::InvalidGasLimit(OutOfBounds { min: Some(min_gas), max: Some(max_gas), found: header.gas_limit })));
+		}
+		Ok(())
+	}
+
+	fn verify_transaction_basic(&self, t: &SignedTransaction, _header: &Header) -> result::Result<(), Error> {
+		try!(t.check_low_s());
+		Ok(())
+	}
+
+	fn verify_transaction(&self, t: &SignedTransaction, _header: &Header) -> Result<(), Error> {
+		t.sender().map(|_|()) // Perform EC recovery and cache sender
+	}
+}
+
+impl Header {
+	/// Get the none field of the header.
+	pub fn signature(&self) -> H520 {
+		decode(&self.seal()[0])
+	}
+}
+
+/// Create a new test chain spec with `BasicAuthority` consensus engine.
+pub fn new_test_authority() -> Spec { Spec::load(include_bytes!("../res/test_authority.json")) }
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+	use common::*;
+	use block::*;
+	use tests::helpers::*;
+	use account_provider::AccountProvider;
+
+	#[test]
+	fn has_valid_metadata() {
+		let engine = new_test_authority().engine;
+		assert!(!engine.name().is_empty());
+		assert!(engine.version().major >= 1);
+	}
+
+	#[test]
+	fn can_return_schedule() {
+		let engine = new_test_authority().engine;
+		let schedule = engine.schedule(&EnvInfo {
+			number: 10000000,
+			author: 0.into(),
+			timestamp: 0,
+			difficulty: 0.into(),
+			last_hashes: vec![],
+			gas_used: 0.into(),
+			gas_limit: 0.into(),
+		});
+
+		assert!(schedule.stack_limit > 0);
+	}
+
+	#[test]
+	fn can_do_seal_verification_fail() {
+		let engine = new_test_authority().engine;
+		let header: Header = Header::default();
+
+		let verify_result = engine.verify_block_basic(&header, None);
+
+		match verify_result {
+			Err(Error::Block(BlockError::InvalidSealArity(_))) => {},
+			Err(_) => { panic!("should be block seal-arity mismatch error (got {:?})", verify_result); },
+			_ => { panic!("Should be error, got Ok"); },
+		}
+	}
+
+	#[test]
+	fn can_do_signature_verification_fail() {
+		let engine = new_test_authority().engine;
+		let mut header: Header = Header::default();
+		header.set_seal(vec![rlp::encode(&Signature::zero()).to_vec()]);
+
+		let verify_result = engine.verify_block_unordered(&header, None);
+
+		match verify_result {
+			Err(Error::Util(UtilError::Crypto(CryptoError::InvalidSignature))) => {},
+			Err(_) => { panic!("should be block difficulty error (got {:?})", verify_result); },
+			_ => { panic!("Should be error, got Ok"); },
+		}
+	}
+
+	#[test]
+	fn can_generate_seal() {
+		let tap = AccountProvider::transient_provider();
+		let addr = tap.insert_account("".sha3(), "").unwrap();
+		tap.unlock_account_permanently(addr, "".into()).unwrap();
+
+		let spec = new_test_authority();
+		let engine = &spec.engine;
+		let genesis_header = spec.genesis_header();
+		let mut db_result = get_temp_journal_db();
+		let mut db = db_result.take();
+		spec.ensure_db_good(db.as_hashdb_mut());
+		let last_hashes = vec![genesis_header.hash()];
+		let vm_factory = Default::default();
+		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, addr, (3141562.into(), 31415620.into()), vec![]).unwrap();
+		let b = b.close_and_lock();
+		let seal = engine.generate_seal(b.block(), Some(&tap)).unwrap();
+		assert!(b.try_seal(engine.deref(), seal).is_ok());
+	}
+}

ethcore/src/block.rs

@@ -22,9 +22,10 @@ use common::*;
 use engine::*;
 use state::*;
 use verification::PreverifiedBlock;
+use trace::FlatTrace;
+use evm::Factory as EvmFactory;
 
 /// A block, encoded as it is on the block chain.
-// TODO: rename to Block
 #[derive(Default, Debug, Clone)]
 pub struct Block {
 	/// The header of this block.
@@ -37,27 +38,21 @@ pub struct Block {
 
 impl Block {
 	/// Returns true if the given bytes form a valid encoding of a block in RLP.
-	// TODO: implement Decoder for this and have this use that.
 	pub fn is_good(b: &[u8]) -> bool {
-		/*
-		let urlp = UntrustedRlp::new(&b);
-		if !urlp.is_list() || urlp.item_count() != 3 || urlp.size() != b.len() { return false; }
-		if urlp.val_at::<Header>(0).is_err() { return false; }
-
-		if !urlp.at(1).unwrap().is_list() { return false; }
-		if urlp.at(1).unwrap().iter().find(|i| i.as_val::<Transaction>().is_err()).is_some() {
-			return false;
-		}
-
-		if !urlp.at(2).unwrap().is_list() { return false; }
-		if urlp.at(2).unwrap().iter().find(|i| i.as_val::<Header>().is_err()).is_some() {
-			return false;
-		}
-		true*/
 		UntrustedRlp::new(b).as_val::<Block>().is_ok()
 	}
+
+	/// Get the RLP-encoding of the block without the seal.
+	pub fn rlp_bytes(&self, seal: Seal) -> Bytes {
+		let mut block_rlp = RlpStream::new_list(3);
+		self.header.stream_rlp(&mut block_rlp, seal);
+		block_rlp.append(&self.transactions);
+		block_rlp.append(&self.uncles);
+		block_rlp.out()
+	}
 }
 
+
 impl Decodable for Block {
 	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
 		if decoder.as_raw().len() != try!(decoder.as_rlp().payload_info()).total() {
@@ -76,19 +71,34 @@ impl Decodable for Block {
 }
 
 /// Internal type for a block's common elements.
-// TODO: rename to ExecutedBlock
-// TODO: use BareBlock
-#[derive(Debug)]
+#[derive(Clone)]
 pub struct ExecutedBlock {
 	base: Block,
 
 	receipts: Vec<Receipt>,
 	transactions_set: HashSet<H256>,
 	state: State,
+	traces: Option<Vec<Vec<FlatTrace>>>,
 }
 
 /// A set of references to `ExecutedBlock` fields that are publicly accessible.
 pub struct BlockRefMut<'a> {
+	/// Block header.
+	pub header: &'a mut Header,
+	/// Block transactions.
+	pub transactions: &'a Vec<SignedTransaction>,
+	/// Block uncles.
+	pub uncles: &'a Vec<Header>,
+	/// Transaction receipts.
+	pub receipts: &'a Vec<Receipt>,
+	/// State.
+	pub state: &'a mut State,
+	/// Traces.
+	pub traces: &'a Option<Vec<Vec<FlatTrace>>>,
+}
+
+/// A set of immutable references to `ExecutedBlock` fields that are publicly accessible.
+pub struct BlockRef<'a> {
 	/// Block header.
 	pub header: &'a Header,
 	/// Block transactions.
@@ -98,30 +108,56 @@ pub struct BlockRefMut<'a> {
 	/// Transaction receipts.
 	pub receipts: &'a Vec<Receipt>,
 	/// State.
-	pub state: &'a mut State,
+	pub state: &'a State,
+	/// Traces.
+	pub traces: &'a Option<Vec<Vec<FlatTrace>>>,
 }
 
 impl ExecutedBlock {
 	/// Create a new block from the given `state`.
-	fn new(state: State) -> ExecutedBlock { ExecutedBlock { base: Default::default(), receipts: Default::default(), transactions_set: Default::default(), state: state } }
+	fn new(state: State, tracing: bool) -> ExecutedBlock {
+		ExecutedBlock {
+			base: Default::default(),
+			receipts: Default::default(),
+			transactions_set: Default::default(),
+			state: state,
+			traces: if tracing {Some(Vec::new())} else {None},
+		}
+	}
 
 	/// Get a structure containing individual references to all public fields.
-	pub fn fields(&mut self) -> BlockRefMut {
+	pub fn fields_mut(&mut self) -> BlockRefMut {
 		BlockRefMut {
-			header: &self.base.header,
+			header: &mut self.base.header,
 			transactions: &self.base.transactions,
 			uncles: &self.base.uncles,
 			state: &mut self.state,
 			receipts: &self.receipts,
+			traces: &self.traces,
+		}
+	}
+
+	/// Get a structure containing individual references to all public fields.
+	pub fn fields(&self) -> BlockRef {
+		BlockRef {
+			header: &self.base.header,
+			transactions: &self.base.transactions,
+			uncles: &self.base.uncles,
+			state: &self.state,
+			receipts: &self.receipts,
+			traces: &self.traces,
 		}
 	}
 }
 
-/// Trait for a object that is_a `ExecutedBlock`.
+/// Trait for a object that is a `ExecutedBlock`.
 pub trait IsBlock {
-	/// Get the block associated with this object.
+	/// Get the `ExecutedBlock` associated with this object.
 	fn block(&self) -> &ExecutedBlock;
 
+	/// Get the base `Block` object associated with this.
+	fn base(&self) -> &Block { &self.block().base }
+
 	/// Get the header associated with this object's block.
 	fn header(&self) -> &Header { &self.block().base.header }
 
@@ -134,10 +170,19 @@ pub trait IsBlock {
 	/// Get all information on receipts in this block.
 	fn receipts(&self) -> &Vec<Receipt> { &self.block().receipts }
 
+	/// Get all information concerning transaction tracing in this block.
+	fn traces(&self) -> &Option<Vec<Vec<FlatTrace>>> { &self.block().traces }
+
 	/// Get all uncles in this block.
 	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 }
 }
@@ -149,32 +194,58 @@ impl IsBlock for ExecutedBlock {
 pub struct OpenBlock<'x> {
 	block: ExecutedBlock,
 	engine: &'x Engine,
+	vm_factory: &'x EvmFactory,
 	last_hashes: LastHashes,
 }
 
-/// Just like OpenBlock, except that we've applied `Engine::on_close_block`, finished up the non-seal header fields,
+/// Just like `OpenBlock`, except that we've applied `Engine::on_close_block`, finished up the non-seal header fields,
 /// and collected the uncles.
 ///
 /// There is no function available to push a transaction.
+#[derive(Clone)]
 pub struct ClosedBlock {
 	block: ExecutedBlock,
 	uncle_bytes: Bytes,
+	last_hashes: LastHashes,
+	unclosed_state: State,
+}
+
+/// Just like `ClosedBlock` except that we can't reopen it and it's faster.
+///
+/// We actually store the post-`Engine::on_close_block` state, unlike in `ClosedBlock` where it's the pre.
+#[derive(Clone)]
+pub struct LockedBlock {
+	block: ExecutedBlock,
+	uncle_bytes: Bytes,
 }
 
 /// A block that has a valid seal.
 ///
-/// The block's header has valid seal arguments. The block cannot be reversed into a ClosedBlock or OpenBlock.
+/// The block's header has valid seal arguments. The block cannot be reversed into a `ClosedBlock` or `OpenBlock`.
 pub struct SealedBlock {
 	block: ExecutedBlock,
 	uncle_bytes: Bytes,
 }
 
 impl<'x> OpenBlock<'x> {
-	/// Create a new OpenBlock ready for transaction pushing.
-	pub fn new(engine: &'x Engine, db: Box<JournalDB>, parent: &Header, last_hashes: LastHashes, author: Address, gas_floor_target: U256, extra_data: Bytes) -> Self {
+	#[cfg_attr(feature="dev", allow(too_many_arguments))]
+	/// Create a new `OpenBlock` ready for transaction pushing.
+	pub fn new(
+		engine: &'x Engine,
+		vm_factory: &'x EvmFactory,
+		tracing: bool,
+		db: Box<JournalDB>,
+		parent: &Header,
+		last_hashes: LastHashes,
+		author: Address,
+		gas_range_target: (U256, U256),
+		extra_data: Bytes,
+	) -> Result<Self, Error> {
+		let state = try!(State::from_existing(db, parent.state_root().clone(), engine.account_start_nonce()));
 		let mut r = OpenBlock {
-			block: ExecutedBlock::new(State::from_existing(db, parent.state_root().clone(), engine.account_start_nonce())),
+			block: ExecutedBlock::new(state, tracing),
 			engine: engine,
+			vm_factory: vm_factory,
 			last_hashes: last_hashes,
 		};
 
@@ -185,9 +256,9 @@ impl<'x> OpenBlock<'x> {
 		r.block.base.header.extra_data = extra_data;
 		r.block.base.header.note_dirty();
 
-		engine.populate_from_parent(&mut r.block.base.header, parent, gas_floor_target);
+		engine.populate_from_parent(&mut r.block.base.header, parent, gas_range_target.0, gas_range_target.1);
 		engine.on_new_block(&mut r.block);
-		r
+		Ok(r)
 	}
 
 	/// Alter the author for the block.
@@ -247,22 +318,31 @@ impl<'x> OpenBlock<'x> {
 	///
 	/// If valid, it will be executed, and archived together with the receipt.
 	pub fn push_transaction(&mut self, t: SignedTransaction, h: Option<H256>) -> Result<&Receipt, Error> {
+		if self.block.transactions_set.contains(&t.hash()) {
+			return Err(From::from(TransactionError::AlreadyImported));
+		}
+
 		let env_info = self.env_info();
 //		info!("env_info says gas_used={}", env_info.gas_used);
-		match self.block.state.apply(&env_info, self.engine, &t) {
-			Ok(receipt) => {
+		match self.block.state.apply(&env_info, self.engine, self.vm_factory, &t, self.block.traces.is_some()) {
+			Ok(outcome) => {
 				self.block.transactions_set.insert(h.unwrap_or_else(||t.hash()));
 				self.block.base.transactions.push(t);
-				self.block.receipts.push(receipt);
+				let t = outcome.trace;
+				self.block.traces.as_mut().map(|traces| traces.push(t));
+				self.block.receipts.push(outcome.receipt);
 				Ok(&self.block.receipts.last().unwrap())
 			}
 			Err(x) => Err(From::from(x))
 		}
 	}
 
-	/// Turn this into a `ClosedBlock`. A BlockChain must be provided in order to figure out the uncles.
+	/// Turn this into a `ClosedBlock`. A `BlockChain` must be provided in order to figure out the uncles.
 	pub fn close(self) -> ClosedBlock {
 		let mut s = self;
+
+		let unclosed_state = s.block.state.clone();
+
 		s.engine.on_close_block(&mut s.block);
 		s.block.base.header.transactions_root = ordered_trie_root(s.block.base.transactions.iter().map(|ref e| e.rlp_bytes().to_vec()).collect());
 		let uncle_bytes = s.block.base.uncles.iter().fold(RlpStream::new_list(s.block.base.uncles.len()), |mut s, u| {s.append_raw(&u.rlp(Seal::With), 1); s} ).out();
@@ -276,6 +356,28 @@ impl<'x> OpenBlock<'x> {
 		ClosedBlock {
 			block: s.block,
 			uncle_bytes: uncle_bytes,
+			last_hashes: s.last_hashes,
+			unclosed_state: unclosed_state,
+		}
+	}
+
+	/// Turn this into a `LockedBlock`. A BlockChain must be provided in order to figure out the uncles.
+	pub fn close_and_lock(self) -> LockedBlock {
+		let mut s = self;
+
+		s.engine.on_close_block(&mut s.block);
+		s.block.base.header.transactions_root = ordered_trie_root(s.block.base.transactions.iter().map(|ref e| e.rlp_bytes().to_vec()).collect());
+		let uncle_bytes = s.block.base.uncles.iter().fold(RlpStream::new_list(s.block.base.uncles.len()), |mut s, u| {s.append_raw(&u.rlp(Seal::With), 1); s} ).out();
+		s.block.base.header.uncles_hash = uncle_bytes.sha3();
+		s.block.base.header.state_root = s.block.state.root().clone();
+		s.block.base.header.receipts_root = ordered_trie_root(s.block.receipts.iter().map(|ref r| r.rlp_bytes().to_vec()).collect());
+		s.block.base.header.log_bloom = s.block.receipts.iter().fold(LogBloom::zero(), |mut b, r| {b = &b | &r.log_bloom; b}); //TODO: use |= operator
+		s.block.base.header.gas_used = s.block.receipts.last().map_or(U256::zero(), |r| r.gas_used);
+		s.block.base.header.note_dirty();
+
+		LockedBlock {
+			block: s.block,
+			uncle_bytes: uncle_bytes,
 		}
 	}
 }
@@ -288,10 +390,40 @@ impl<'x> IsBlock for ClosedBlock {
 	fn block(&self) -> &ExecutedBlock { &self.block }
 }
 
+impl<'x> IsBlock for LockedBlock {
+	fn block(&self) -> &ExecutedBlock { &self.block }
+}
+
 impl ClosedBlock {
 	/// Get the hash of the header without seal arguments.
 	pub fn hash(&self) -> H256 { self.header().rlp_sha3(Seal::Without) }
 
+	/// Turn this into a `LockedBlock`, unable to be reopened again.
+	pub fn lock(self) -> LockedBlock {
+		LockedBlock {
+			block: self.block,
+			uncle_bytes: self.uncle_bytes,
+		}
+	}
+
+	/// Given an engine reference, reopen the `ClosedBlock` into an `OpenBlock`.
+	pub fn reopen<'a>(self, engine: &'a Engine, vm_factory: &'a EvmFactory) -> OpenBlock<'a> {
+		// revert rewards (i.e. set state back at last transaction's state).
+		let mut block = self.block;
+		block.state = self.unclosed_state;
+		OpenBlock {
+			block: block,
+			engine: engine,
+			vm_factory: vm_factory,
+			last_hashes: self.last_hashes,
+		}
+	}
+}
+
+impl LockedBlock {
+	/// Get the hash of the header without seal arguments.
+	pub fn hash(&self) -> H256 { self.header().rlp_sha3(Seal::Without) }
+
 	/// Provide a valid seal in order to turn this into a `SealedBlock`.
 	///
 	/// NOTE: This does not check the validity of `seal` with the engine.
@@ -307,7 +439,7 @@ impl ClosedBlock {
 	/// Provide a valid seal in order to turn this into a `SealedBlock`.
 	/// This does check the validity of `seal` with the engine.
 	/// Returns the `ClosedBlock` back again if the seal is no good.
-	pub fn try_seal(self, engine: &Engine, seal: Vec<Bytes>) -> Result<SealedBlock, ClosedBlock> {
+	pub fn try_seal(self, engine: &Engine, seal: Vec<Bytes>) -> Result<SealedBlock, LockedBlock> {
 		let mut s = self;
 		s.block.base.header.set_seal(seal);
 		match engine.verify_block_seal(&s.block.base.header) {
@@ -315,9 +447,11 @@ impl ClosedBlock {
 			_ => 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 {
@@ -329,9 +463,11 @@ 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 {
@@ -339,40 +475,80 @@ impl IsBlock for SealedBlock {
 }
 
 /// Enact the block given by block header, transactions and uncles
-pub fn enact(header: &Header, transactions: &[SignedTransaction], uncles: &[Header], engine: &Engine, db: Box<JournalDB>, parent: &Header, last_hashes: LastHashes) -> Result<ClosedBlock, Error> {
+#[cfg_attr(feature="dev", allow(too_many_arguments))]
+pub fn enact(
+	header: &Header,
+	transactions: &[SignedTransaction],
+	uncles: &[Header],
+	engine: &Engine,
+	tracing: bool,
+	db: Box<JournalDB>,
+	parent: &Header,
+	last_hashes: LastHashes,
+	vm_factory: &EvmFactory
+) -> Result<LockedBlock, Error> {
 	{
 		if ::log::max_log_level() >= ::log::LogLevel::Trace {
-			let s = State::from_existing(db.spawn(), parent.state_root().clone(), engine.account_start_nonce());
+			let s = try!(State::from_existing(db.boxed_clone(), parent.state_root().clone(), engine.account_start_nonce()));
 			trace!("enact(): root={}, author={}, author_balance={}\n", s.root(), header.author(), s.balance(&header.author()));
 		}
 	}
 
-	let mut b = OpenBlock::new(engine, db, parent, last_hashes, header.author().clone(), x!(3141562), header.extra_data().clone());
+	let mut b = try!(OpenBlock::new(engine, vm_factory, tracing, db, parent, last_hashes, Address::new(), (3141562.into(), 31415620.into()), vec![]));
 	b.set_difficulty(*header.difficulty());
 	b.set_gas_limit(*header.gas_limit());
 	b.set_timestamp(header.timestamp());
+	b.set_author(header.author().clone());
+	b.set_extra_data(header.extra_data().clone()).unwrap_or_else(|e| warn!("Couldn't set extradata: {}. Ignoring.", e));
 	for t in transactions { try!(b.push_transaction(t.clone(), None)); }
 	for u in uncles { try!(b.push_uncle(u.clone())); }
-	Ok(b.close())
+	Ok(b.close_and_lock())
 }
 
 /// Enact the block given by `block_bytes` using `engine` on the database `db` with given `parent` block header
-pub fn enact_bytes(block_bytes: &[u8], engine: &Engine, db: Box<JournalDB>, parent: &Header, last_hashes: LastHashes) -> Result<ClosedBlock, Error> {
+#[cfg_attr(feature="dev", allow(too_many_arguments))]
+pub fn enact_bytes(
+	block_bytes: &[u8],
+	engine: &Engine,
+	tracing: bool,
+	db: Box<JournalDB>,
+	parent: &Header,
+	last_hashes: LastHashes,
+	vm_factory: &EvmFactory
+) -> Result<LockedBlock, Error> {
 	let block = BlockView::new(block_bytes);
 	let header = block.header();
-	enact(&header, &block.transactions(), &block.uncles(), engine, db, parent, last_hashes)
+	enact(&header, &block.transactions(), &block.uncles(), engine, tracing, db, parent, last_hashes, vm_factory)
 }
 
 /// Enact the block given by `block_bytes` using `engine` on the database `db` with given `parent` block header
-pub fn enact_verified(block: &PreverifiedBlock, engine: &Engine, db: Box<JournalDB>, parent: &Header, last_hashes: LastHashes) -> Result<ClosedBlock, Error> {
+#[cfg_attr(feature="dev", allow(too_many_arguments))]
+pub fn enact_verified(
+	block: &PreverifiedBlock,
+	engine: &Engine,
+	tracing: bool,
+	db: Box<JournalDB>,
+	parent: &Header,
+	last_hashes: LastHashes,
+	vm_factory: &EvmFactory
+) -> Result<LockedBlock, Error> {
 	let view = BlockView::new(&block.bytes);
-	enact(&block.header, &block.transactions, &view.uncles(), engine, db, parent, last_hashes)
+	enact(&block.header, &block.transactions, &view.uncles(), engine, tracing, db, parent, last_hashes, vm_factory)
 }
 
 /// Enact the block given by `block_bytes` using `engine` on the database `db` with given `parent` block header. Seal the block aferwards
-pub fn enact_and_seal(block_bytes: &[u8], engine: &Engine, db: Box<JournalDB>, parent: &Header, last_hashes: LastHashes) -> Result<SealedBlock, Error> {
+#[cfg_attr(feature="dev", allow(too_many_arguments))]
+pub fn enact_and_seal(
+	block_bytes: &[u8],
+	engine: &Engine,
+	tracing: bool,
+	db: Box<JournalDB>,
+	parent: &Header,
+	last_hashes: LastHashes,
+	vm_factory: &EvmFactory
+) -> Result<SealedBlock, Error> {
 	let header = BlockView::new(block_bytes).header_view();
-	Ok(try!(try!(enact_bytes(block_bytes, engine, db, parent, last_hashes)).seal(engine, header.seal())))
+	Ok(try!(try!(enact_bytes(block_bytes, engine, tracing, db, parent, last_hashes, vm_factory)).seal(engine, header.seal())))
 }
 
 #[cfg(test)]
@@ -380,39 +556,43 @@ mod tests {
 	use tests::helpers::*;
 	use super::*;
 	use common::*;
-	use engine::*;
 
 	#[test]
 	fn open_block() {
 		use spec::*;
-		let engine = Spec::new_test().to_engine().unwrap();
-		let genesis_header = engine.spec().genesis_header();
+		let spec = Spec::new_test();
+		let engine = &spec.engine;
+		let genesis_header = spec.genesis_header();
 		let mut db_result = get_temp_journal_db();
 		let mut db = db_result.take();
-		engine.spec().ensure_db_good(db.as_hashdb_mut());
+		spec.ensure_db_good(db.as_hashdb_mut());
 		let last_hashes = vec![genesis_header.hash()];
-		let b = OpenBlock::new(engine.deref(), db, &genesis_header, last_hashes, Address::zero(), x!(3141562), vec![]);
-		let b = b.close();
+		let vm_factory = Default::default();
+		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
+		let b = b.close_and_lock();
 		let _ = b.seal(engine.deref(), vec![]);
 	}
 
 	#[test]
 	fn enact_block() {
 		use spec::*;
-		let engine = Spec::new_test().to_engine().unwrap();
-		let genesis_header = engine.spec().genesis_header();
+		let spec = Spec::new_test();
+		let engine = &spec.engine;
+		let genesis_header = spec.genesis_header();
 
 		let mut db_result = get_temp_journal_db();
 		let mut db = db_result.take();
-		engine.spec().ensure_db_good(db.as_hashdb_mut());
-		let b = OpenBlock::new(engine.deref(), db, &genesis_header, vec![genesis_header.hash()], Address::zero(), x!(3141562), vec![]).close().seal(engine.deref(), vec![]).unwrap();
+		spec.ensure_db_good(db.as_hashdb_mut());
+		let vm_factory = Default::default();
+		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, vec![genesis_header.hash()], Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap()
+			.close_and_lock().seal(engine.deref(), vec![]).unwrap();
 		let orig_bytes = b.rlp_bytes();
 		let orig_db = b.drain();
 
 		let mut db_result = get_temp_journal_db();
 		let mut db = db_result.take();
-		engine.spec().ensure_db_good(db.as_hashdb_mut());
-		let e = enact_and_seal(&orig_bytes, engine.deref(), db, &genesis_header, vec![genesis_header.hash()]).unwrap();
+		spec.ensure_db_good(db.as_hashdb_mut());
+		let e = enact_and_seal(&orig_bytes, engine.deref(), false, db, &genesis_header, vec![genesis_header.hash()], &Default::default()).unwrap();
 
 		assert_eq!(e.rlp_bytes(), orig_bytes);
 
@@ -424,28 +604,30 @@ mod tests {
 	#[test]
 	fn enact_block_with_uncle() {
 		use spec::*;
-		let engine = Spec::new_test().to_engine().unwrap();
-		let genesis_header = engine.spec().genesis_header();
+		let spec = Spec::new_test();
+		let engine = &spec.engine;
+		let genesis_header = spec.genesis_header();
 
 		let mut db_result = get_temp_journal_db();
 		let mut db = db_result.take();
-		engine.spec().ensure_db_good(db.as_hashdb_mut());
-		let mut open_block = OpenBlock::new(engine.deref(), db, &genesis_header, vec![genesis_header.hash()], Address::zero(), x!(3141562), vec![]);
+		spec.ensure_db_good(db.as_hashdb_mut());
+		let vm_factory = Default::default();
+		let mut open_block = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, vec![genesis_header.hash()], Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let mut uncle1_header = Header::new();
 		uncle1_header.extra_data = b"uncle1".to_vec();
 		let mut uncle2_header = Header::new();
 		uncle2_header.extra_data = b"uncle2".to_vec();
 		open_block.push_uncle(uncle1_header).unwrap();
 		open_block.push_uncle(uncle2_header).unwrap();
-		let b = open_block.close().seal(engine.deref(), vec![]).unwrap();
-		
+		let b = open_block.close_and_lock().seal(engine.deref(), vec![]).unwrap();
+
 		let orig_bytes = b.rlp_bytes();
 		let orig_db = b.drain();
 
 		let mut db_result = get_temp_journal_db();
 		let mut db = db_result.take();
-		engine.spec().ensure_db_good(db.as_hashdb_mut());
-		let e = enact_and_seal(&orig_bytes, engine.deref(), db, &genesis_header, vec![genesis_header.hash()]).unwrap();
+		spec.ensure_db_good(db.as_hashdb_mut());
+		let e = enact_and_seal(&orig_bytes, engine.deref(), false, db, &genesis_header, vec![genesis_header.hash()], &Default::default()).unwrap();
 
 		let bytes = e.rlp_bytes();
 		assert_eq!(bytes, orig_bytes);

ethcore/src/block_queue.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/>.
 
-//! A queue of blocks. Sits between network or other I/O and the BlockChain.
+//! A queue of blocks. Sits between network or other I/O and the `BlockChain`.
 //! Sorts them ready for blockchain insertion.
 use std::thread::{JoinHandle, self};
 use std::sync::atomic::{AtomicBool, Ordering as AtomicOrdering};
@@ -89,7 +89,7 @@ impl BlockQueueInfo {
 	}
 }
 
-/// A queue of blocks. Sits between network or other I/O and the BlockChain.
+/// A queue of blocks. Sits between network or other I/O and the `BlockChain`.
 /// Sorts them ready for blockchain insertion.
 pub struct BlockQueue {
 	panic_handler: Arc<PanicHandler>,
@@ -116,6 +116,7 @@ struct VerifyingBlock {
 }
 
 struct QueueSignal {
+	deleting: Arc<AtomicBool>,
 	signalled: AtomicBool,
 	message_channel: IoChannel<NetSyncMessage>,
 }
@@ -123,10 +124,18 @@ struct QueueSignal {
 impl QueueSignal {
 	#[cfg_attr(feature="dev", allow(bool_comparison))]
 	fn set(&self) {
+		// Do not signal when we are about to close
+		if self.deleting.load(AtomicOrdering::Relaxed) {
+			return;
+		}
+
 		if self.signalled.compare_and_swap(false, true, AtomicOrdering::Relaxed) == false {
-			self.message_channel.send(UserMessage(SyncMessage::BlockVerified)).expect("Error sending BlockVerified message");
+			if let Err(e) = self.message_channel.send(UserMessage(SyncMessage::BlockVerified)) {
+				debug!("Error sending BlockVerified message: {:?}", e);
+			}
 		}
 	}
+
 	fn reset(&self) {
 		self.signalled.store(false, AtomicOrdering::Relaxed);
 	}
@@ -150,8 +159,12 @@ impl BlockQueue {
 			bad: Mutex::new(HashSet::new()),
 		});
 		let more_to_verify = Arc::new(Condvar::new());
-		let ready_signal = Arc::new(QueueSignal { signalled: AtomicBool::new(false), message_channel: message_channel });
 		let deleting = Arc::new(AtomicBool::new(false));
+		let ready_signal = Arc::new(QueueSignal {
+			deleting: deleting.clone(),
+			signalled: AtomicBool::new(false),
+			message_channel: message_channel
+		});
 		let empty = Arc::new(Condvar::new());
 		let panic_handler = PanicHandler::new_in_arc();
 
@@ -300,17 +313,17 @@ impl BlockQueue {
 		let h = header.hash();
 		{
 			if self.processing.read().unwrap().contains(&h) {
-				return Err(x!(ImportError::AlreadyQueued));
+				return Err(ImportError::AlreadyQueued.into());
 			}
 
 			let mut bad = self.verification.bad.lock().unwrap();
 			if bad.contains(&h) {
-				return Err(x!(ImportError::KnownBad));
+				return Err(ImportError::KnownBad.into());
 			}
 
 			if bad.contains(&header.parent_hash) {
 				bad.insert(h.clone());
-				return Err(x!(ImportError::KnownBad));
+				return Err(ImportError::KnownBad.into());
 			}
 		}
 
@@ -431,12 +444,14 @@ impl MayPanic for BlockQueue {
 
 impl Drop for BlockQueue {
 	fn drop(&mut self) {
+		trace!(target: "shutdown", "[BlockQueue] Closing...");
 		self.clear();
 		self.deleting.store(true, AtomicOrdering::Release);
 		self.more_to_verify.notify_all();
 		for t in self.verifiers.drain(..) {
 			t.join().unwrap();
 		}
+		trace!(target: "shutdown", "[BlockQueue] Closed.");
 	}
 }
 
@@ -451,7 +466,7 @@ mod tests {
 
 	fn get_test_queue() -> BlockQueue {
 		let spec = get_test_spec();
-		let engine = spec.to_engine().unwrap();
+		let engine = spec.engine;
 		BlockQueue::new(BlockQueueConfig::default(), Arc::new(engine), IoChannel::disconnected())
 	}
 
@@ -459,7 +474,7 @@ mod tests {
 	fn can_be_created() {
 		// TODO better test
 		let spec = Spec::new_test();
-		let engine = spec.to_engine().unwrap();
+		let engine = spec.engine;
 		let _ = BlockQueue::new(BlockQueueConfig::default(), Arc::new(engine), IoChannel::disconnected());
 	}
 
@@ -520,7 +535,7 @@ mod tests {
 	#[test]
 	fn test_mem_limit() {
 		let spec = get_test_spec();
-		let engine = spec.to_engine().unwrap();
+		let engine = spec.engine;
 		let mut config = BlockQueueConfig::default();
 		config.max_mem_use = super::MIN_MEM_LIMIT;  // empty queue uses about 15000
 		let queue = BlockQueue::new(config, Arc::new(engine), IoChannel::disconnected());

ethcore/src/blockchain/block_info.rs

@@ -17,6 +17,8 @@
 use util::numbers::{U256,H256};
 use header::BlockNumber;
 
+use util::bytes::{FromRawBytesVariable, FromBytesError, ToBytesWithMap};
+
 /// Brief info about inserted block.
 #[derive(Clone)]
 pub struct BlockInfo {
@@ -40,12 +42,55 @@ pub enum BlockLocation {
 	/// It's part of the fork which should become canon chain,
 	/// because it's total difficulty is higher than current
 	/// canon chain difficulty.
-	BranchBecomingCanonChain {
-		/// Hash of the newest common ancestor with old canon chain.
-		ancestor: H256,
-		/// Hashes of the blocks between ancestor and this block.
-		enacted: Vec<H256>,
-		/// Hashes of the blocks which were invalidated.
-		retracted: Vec<H256>,
+	BranchBecomingCanonChain(BranchBecomingCanonChainData),
+}
+
+#[derive(Clone)]
+pub struct BranchBecomingCanonChainData {
+	/// Hash of the newest common ancestor with old canon chain.
+	pub ancestor: H256,
+	/// Hashes of the blocks between ancestor and this block.
+	pub enacted: Vec<H256>,
+	/// Hashes of the blocks which were invalidated.
+	pub retracted: Vec<H256>,
+}
+
+impl FromRawBytesVariable for BranchBecomingCanonChainData {
+	fn from_bytes_variable(bytes: &[u8]) -> Result<BranchBecomingCanonChainData, FromBytesError> {
+		type Tuple = (Vec<H256>, Vec<H256>, H256);
+		let (enacted, retracted, ancestor) = try!(Tuple::from_bytes_variable(bytes));
+		Ok(BranchBecomingCanonChainData { ancestor: ancestor, enacted: enacted, retracted: retracted })
+	}
+}
+
+impl FromRawBytesVariable for BlockLocation {
+	fn from_bytes_variable(bytes: &[u8]) -> Result<BlockLocation, FromBytesError> {
+		match bytes[0] {
+			0 => Ok(BlockLocation::CanonChain),
+			1 => Ok(BlockLocation::Branch),
+			2 => Ok(BlockLocation::BranchBecomingCanonChain(
+				try!(BranchBecomingCanonChainData::from_bytes_variable(&bytes[1..bytes.len()])))),
+			_ => Err(FromBytesError::UnknownMarker)
+		}
+	}
+}
+
+impl ToBytesWithMap for BranchBecomingCanonChainData {
+	fn to_bytes_map(&self) -> Vec<u8> {
+		(&self.enacted, &self.retracted, &self.ancestor).to_bytes_map()
+	}
+}
+
+impl ToBytesWithMap for BlockLocation {
+	fn to_bytes_map(&self) -> Vec<u8> {
+		match *self {
+			BlockLocation::CanonChain => vec![0u8],
+			BlockLocation::Branch => vec![1u8],
+			BlockLocation::BranchBecomingCanonChain(ref data) => {
+				let mut bytes = (&data.enacted, &data.retracted, &data.ancestor).to_bytes_map();
+				bytes.insert(0, 2u8);
+				bytes
+			}
+		}
 	}
 }

ethcore/src/blockchain/blockchain.rs

@@ -17,40 +17,23 @@
 //! Blockchain database.
 
 use std::sync::atomic::{AtomicUsize, Ordering as AtomicOrder};
+use bloomchain as bc;
 use util::*;
 use header::*;
-use extras::*;
+use super::extras::*;
 use transaction::*;
 use views::*;
 use receipt::Receipt;
-use chainfilter::{ChainFilter, BloomIndex, FilterDataSource};
-use blockchain::block_info::{BlockInfo, BlockLocation};
+use blooms::{Bloom, BloomGroup};
+use blockchain::block_info::{BlockInfo, BlockLocation, BranchBecomingCanonChainData};
 use blockchain::best_block::BestBlock;
-use blockchain::bloom_indexer::BloomIndexer;
-use blockchain::tree_route::TreeRoute;
+use types::tree_route::TreeRoute;
 use blockchain::update::ExtrasUpdate;
-use blockchain::{CacheSize, ImportRoute};
+use blockchain::{CacheSize, ImportRoute, Config};
+use db::{Writable, Readable, CacheUpdatePolicy, Key};
 
-const BLOOM_INDEX_SIZE: usize = 16;
-const BLOOM_LEVELS: u8 = 3;
-
-/// Blockchain configuration.
-#[derive(Debug)]
-pub struct BlockChainConfig {
-	/// Preferred cache size in bytes.
-	pub pref_cache_size: usize,
-	/// Maximum cache size in bytes.
-	pub max_cache_size: usize,
-}
-
-impl Default for BlockChainConfig {
-	fn default() -> Self {
-		BlockChainConfig {
-			pref_cache_size: 1 << 14,
-			max_cache_size: 1 << 20,
-		}
-	}
-}
+const LOG_BLOOMS_LEVELS: usize = 3;
+const LOG_BLOOMS_ELEMENTS_PER_INDEX: usize = 16;
 
 /// Interface for querying blocks by hash and by number.
 pub trait BlockProvider {
@@ -100,6 +83,11 @@ pub trait BlockProvider {
 		self.block(&address.block_hash).and_then(|bytes| BlockView::new(&bytes).localized_transaction_at(address.index))
 	}
 
+	/// Get transaction receipt.
+	fn transaction_receipt(&self, address: &TransactionAddress) -> Option<Receipt> {
+		self.block_receipts(&address.block_hash).and_then(|br| br.receipts.into_iter().nth(address.index))
+	}
+
 	/// Get a list of transactions for a given block.
 	/// Returns None if block does not exist.
 	fn transactions(&self, hash: &H256) -> Option<Vec<LocalizedTransaction>> {
@@ -123,7 +111,11 @@ pub trait BlockProvider {
 #[derive(Debug, Hash, Eq, PartialEq, Clone)]
 enum CacheID {
 	Block(H256),
-	Extras(ExtrasIndex, H256),
+	BlockDetails(H256),
+	BlockHashes(BlockNumber),
+	TransactionAddresses(H256),
+	BlocksBlooms(LogGroupPosition),
+	BlockReceipts(H256),
 }
 
 struct CacheManager {
@@ -131,6 +123,14 @@ struct CacheManager {
 	in_use: HashSet<CacheID>,
 }
 
+impl bc::group::BloomGroupDatabase for BlockChain {
+	fn blooms_at(&self, position: &bc::group::GroupPosition) -> Option<bc::group::BloomGroup> {
+		let position = LogGroupPosition::from(position.clone());
+		self.note_used(CacheID::BlocksBlooms(position.clone()));
+		self.extras_db.read_with_cache(&self.blocks_blooms, &position).map(Into::into)
+	}
+}
+
 /// Structure providing fast access to blockchain data.
 ///
 /// **Does not do input data verification.**
@@ -138,6 +138,7 @@ pub struct BlockChain {
 	// All locks must be captured in the order declared here.
 	pref_cache_size: AtomicUsize,
 	max_cache_size: AtomicUsize,
+	blooms_config: bc::Config,
 
 	best_block: RwLock<BestBlock>,
 
@@ -148,8 +149,7 @@ pub struct BlockChain {
 	block_details: RwLock<HashMap<H256, BlockDetails>>,
 	block_hashes: RwLock<HashMap<BlockNumber, H256>>,
 	transaction_addresses: RwLock<HashMap<H256, TransactionAddress>>,
-	block_logs: RwLock<HashMap<H256, BlockLogBlooms>>,
-	blocks_blooms: RwLock<HashMap<H256, BlocksBlooms>>,
+	blocks_blooms: RwLock<HashMap<LogGroupPosition, BloomGroup>>,
 	block_receipts: RwLock<HashMap<H256, BlockReceipts>>,
 
 	extras_db: Database,
@@ -157,24 +157,14 @@ pub struct BlockChain {
 
 	cache_man: RwLock<CacheManager>,
 
-	// blooms indexing
-	bloom_indexer: BloomIndexer,
-
 	insert_lock: Mutex<()>
 }
 
-impl FilterDataSource for BlockChain {
-	fn bloom_at_index(&self, bloom_index: &BloomIndex) -> Option<H2048> {
-		let location = self.bloom_indexer.location(bloom_index);
-		self.blocks_blooms(&location.hash).and_then(|blooms| blooms.blooms.into_iter().nth(location.index).cloned())
-	}
-}
-
 impl BlockProvider for BlockChain {
 	/// Returns true if the given block is known
 	/// (though not necessarily a part of the canon chain).
 	fn is_known(&self, hash: &H256) -> bool {
-		self.query_extras_exist(hash, &self.block_details)
+		self.extras_db.exists_with_cache(&self.block_details, hash)
 	}
 
 	/// Get raw block data
@@ -204,28 +194,36 @@ impl BlockProvider for BlockChain {
 
 	/// Get the familial details concerning a block.
 	fn block_details(&self, hash: &H256) -> Option<BlockDetails> {
-		self.query_extras(hash, &self.block_details)
+		self.note_used(CacheID::BlockDetails(hash.clone()));
+		self.extras_db.read_with_cache(&self.block_details, hash)
 	}
 
 	/// Get the hash of given block's number.
 	fn block_hash(&self, index: BlockNumber) -> Option<H256> {
-		self.query_extras(&index, &self.block_hashes)
+		self.note_used(CacheID::BlockHashes(index));
+		self.extras_db.read_with_cache(&self.block_hashes, &index)
 	}
 
 	/// Get the address of transaction with given hash.
 	fn transaction_address(&self, hash: &H256) -> Option<TransactionAddress> {
-		self.query_extras(hash, &self.transaction_addresses)
+		self.note_used(CacheID::TransactionAddresses(hash.clone()));
+		self.extras_db.read_with_cache(&self.transaction_addresses, hash)
 	}
 
 	/// Get receipts of block with given hash.
 	fn block_receipts(&self, hash: &H256) -> Option<BlockReceipts> {
-		self.query_extras(hash, &self.block_receipts)
+		self.note_used(CacheID::BlockReceipts(hash.clone()));
+		self.extras_db.read_with_cache(&self.block_receipts, hash)
 	}
 
 	/// Returns numbers of blocks containing given bloom.
 	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockNumber, to_block: BlockNumber) -> Vec<BlockNumber> {
-		let filter = ChainFilter::new(self, self.bloom_indexer.index_size(), self.bloom_indexer.levels());
-		filter.blocks_with_bloom(bloom, from_block as usize, to_block as usize).into_iter().map(|b| b as BlockNumber).collect()
+		let range = from_block as bc::Number..to_block as bc::Number;
+		let chain = bc::group::BloomGroupChain::new(self.blooms_config, self);
+		chain.with_bloom(&range, &Bloom::from(bloom.clone()).into())
+			.into_iter()
+			.map(|b| b as BlockNumber)
+			.collect()
 	}
 }
 
@@ -251,16 +249,26 @@ impl<'a> Iterator for AncestryIter<'a> {
 
 impl BlockChain {
 	/// Create new instance of blockchain from given Genesis
-	pub fn new(config: BlockChainConfig, genesis: &[u8], path: &Path) -> BlockChain {
+	pub fn new(config: Config, genesis: &[u8], path: &Path) -> BlockChain {
 		// open extras db
 		let mut extras_path = path.to_path_buf();
 		extras_path.push("extras");
-		let extras_db = Database::open_default(extras_path.to_str().unwrap()).unwrap();
+		let extras_db = match config.db_cache_size {
+			None => Database::open_default(extras_path.to_str().unwrap()).unwrap(),
+			Some(cache_size) => Database::open(
+				&DatabaseConfig::with_cache(cache_size/2),
+				extras_path.to_str().unwrap()).unwrap(),
+		};
 
 		// open blocks db
 		let mut blocks_path = path.to_path_buf();
 		blocks_path.push("blocks");
-		let blocks_db = Database::open_default(blocks_path.to_str().unwrap()).unwrap();
+		let blocks_db = match config.db_cache_size {
+			None => Database::open_default(blocks_path.to_str().unwrap()).unwrap(),
+			Some(cache_size) => Database::open(
+				&DatabaseConfig::with_cache(cache_size/2),
+				blocks_path.to_str().unwrap()).unwrap(),
+		};
 
 		let mut cache_man = CacheManager{cache_usage: VecDeque::new(), in_use: HashSet::new()};
 		(0..COLLECTION_QUEUE_SIZE).foreach(|_| cache_man.cache_usage.push_back(HashSet::new()));
@@ -268,24 +276,53 @@ impl BlockChain {
 		let bc = BlockChain {
 			pref_cache_size: AtomicUsize::new(config.pref_cache_size),
 			max_cache_size: AtomicUsize::new(config.max_cache_size),
+			blooms_config: bc::Config {
+				levels: LOG_BLOOMS_LEVELS,
+				elements_per_index: LOG_BLOOMS_ELEMENTS_PER_INDEX,
+			},
 			best_block: RwLock::new(BestBlock::default()),
 			blocks: RwLock::new(HashMap::new()),
 			block_details: RwLock::new(HashMap::new()),
 			block_hashes: RwLock::new(HashMap::new()),
 			transaction_addresses: RwLock::new(HashMap::new()),
-			block_logs: RwLock::new(HashMap::new()),
 			blocks_blooms: RwLock::new(HashMap::new()),
 			block_receipts: RwLock::new(HashMap::new()),
 			extras_db: extras_db,
 			blocks_db: blocks_db,
 			cache_man: RwLock::new(cache_man),
-			bloom_indexer: BloomIndexer::new(BLOOM_INDEX_SIZE, BLOOM_LEVELS),
 			insert_lock: Mutex::new(()),
 		};
 
 		// load best block
 		let best_block_hash = match bc.extras_db.get(b"best").unwrap() {
-			Some(best) => H256::from_slice(&best),
+			Some(best) => {
+				let best = H256::from_slice(&best);
+				let mut b = best.clone();
+				let mut removed = 0;
+				let mut best_num = 0;
+				while !bc.blocks_db.get(&b).unwrap().is_some() {
+					// track back to the best block we have in the blocks database
+					let extras: BlockDetails = bc.extras_db.read(&b).unwrap();
+					type DetailsKey = Key<BlockDetails, Target=H264>;
+					bc.extras_db.delete(&(DetailsKey::key(&b))).unwrap();
+					b = extras.parent;
+					best_num = extras.number;
+					removed += 1;
+				}
+				if b != best {
+					let batch = DBTransaction::new();
+					let range = (best_num + 1) as bc::Number .. (best_num + removed) as bc::Number;
+					let chain = bc::group::BloomGroupChain::new(bc.blooms_config, &bc);
+					let changes = chain.replace(&range, vec![]);
+					for (k, v) in changes.into_iter() {
+						batch.write(&LogGroupPosition::from(k), &BloomGroup::from(v));
+					}
+					batch.put(b"best", &b).unwrap();
+					bc.extras_db.write(batch).unwrap();
+					info!("Restored mismatched best block. Was: {}, new: {}", best.hex(), b.hex());
+				}
+				b
+			}
 			None => {
 				// best block does not exist
 				// we need to insert genesis into the cache
@@ -303,8 +340,8 @@ impl BlockChain {
 				bc.blocks_db.put(&hash, genesis).unwrap();
 
 				let batch = DBTransaction::new();
-				batch.put_extras(&hash, &details);
-				batch.put_extras(&header.number(), &hash);
+				batch.write(&hash, &details);
+				batch.write(&header.number(), &hash);
 				batch.put(b"best", &hash).unwrap();
 				bc.extras_db.write(batch).unwrap();
 
@@ -416,6 +453,7 @@ impl BlockChain {
 		}
 	}
 
+	#[cfg_attr(feature="dev", allow(similar_names))]
 	/// Inserts the block into backing cache database.
 	/// Expects the block to be valid and already verified.
 	/// If the block is already known, does nothing.
@@ -450,43 +488,34 @@ impl BlockChain {
 	/// Applies extras update.
 	fn apply_update(&self, update: ExtrasUpdate) {
 		let batch = DBTransaction::new();
-		batch.put(b"best", &update.info.hash).unwrap();
 
 		{
-			let mut write_details = self.block_details.write().unwrap();
-			for (hash, details) in update.block_details.into_iter() {
-				batch.put_extras(&hash, &details);
-				self.note_used(CacheID::Extras(ExtrasIndex::BlockDetails, hash.clone()));
-				write_details.insert(hash, details);
+			for hash in update.block_details.keys().cloned() {
+				self.note_used(CacheID::BlockDetails(hash));
 			}
+
+			let mut write_details = self.block_details.write().unwrap();
+			batch.extend_with_cache(write_details.deref_mut(), update.block_details, CacheUpdatePolicy::Overwrite);
 		}
 
 		{
 			let mut write_receipts = self.block_receipts.write().unwrap();
-			for (hash, receipt) in &update.block_receipts {
-				batch.put_extras(hash, receipt);
-				write_receipts.remove(hash);
-			}
+			batch.extend_with_cache(write_receipts.deref_mut(), update.block_receipts, CacheUpdatePolicy::Remove);
 		}
 
 		{
 			let mut write_blocks_blooms = self.blocks_blooms.write().unwrap();
-			for (bloom_hash, blocks_bloom) in &update.blocks_blooms {
-				batch.put_extras(bloom_hash, blocks_bloom);
-				write_blocks_blooms.remove(bloom_hash);
-			}
+			batch.extend_with_cache(write_blocks_blooms.deref_mut(), update.blocks_blooms, CacheUpdatePolicy::Remove);
 		}
 
 		// These cached values must be updated last and togeterh
 		{
-			let mut best_block = self.best_block.write().unwrap();
-			let mut write_hashes = self.block_hashes.write().unwrap();
-			let mut write_txs = self.transaction_addresses.write().unwrap();
-
 			// update best block
 			match update.info.location {
 				BlockLocation::Branch => (),
 				_ => {
+					batch.put(b"best", &update.info.hash).unwrap();
+					let mut best_block = self.best_block.write().unwrap();
 					*best_block = BestBlock {
 						hash: update.info.hash,
 						number: update.info.number,
@@ -495,15 +524,11 @@ impl BlockChain {
 				}
 			}
 
-			for (number, hash) in &update.block_hashes {
-				batch.put_extras(number, hash);
-				write_hashes.remove(number);
-			}
+			let mut write_hashes = self.block_hashes.write().unwrap();
+			let mut write_txs = self.transaction_addresses.write().unwrap();
 
-			for (hash, tx_address) in &update.transactions_addresses {
-				batch.put_extras(hash, tx_address);
-				write_txs.remove(hash);
-			}
+			batch.extend_with_cache(&mut *write_hashes, update.block_hashes, CacheUpdatePolicy::Remove);
+			batch.extend_with_cache(&mut *write_txs, update.transactions_addresses, CacheUpdatePolicy::Remove);
 
 			// update extras database
 			self.extras_db.write(batch).unwrap();
@@ -524,6 +549,11 @@ impl BlockChain {
 
 	/// Given a block's `parent`, find every block header which represents a valid possible uncle.
 	pub fn find_uncle_headers(&self, parent: &H256, uncle_generations: usize) -> Option<Vec<Header>> {
+		self.find_uncle_hashes(parent, uncle_generations).map(|v| v.into_iter().filter_map(|h| self.block_header(&h)).collect())
+	}
+
+	/// Given a block's `parent`, find every block hash which represents a valid possible uncle.
+	pub fn find_uncle_hashes(&self, parent: &H256, uncle_generations: usize) -> Option<Vec<H256>> {
 		if !self.is_known(parent) { return None; }
 
 		let mut excluded = HashSet::new();
@@ -535,13 +565,13 @@ impl BlockChain {
 		let mut ret = Vec::new();
 		for a in self.ancestry_iter(parent.clone()).unwrap().skip(1).take(uncle_generations) {
 			ret.extend(self.block_details(&a).unwrap().children.iter()
-				.filter_map(|h| if excluded.contains(h) { None } else { self.block_header(h) })
+				.filter(|h| !excluded.contains(h))
 			);
 		}
 		Some(ret)
 	}
 
-	/// Get inserted block info which is critical to preapre extras updates.
+	/// Get inserted block info which is critical to prepare extras updates.
 	fn block_info(&self, block_bytes: &[u8]) -> BlockInfo {
 		let block = BlockView::new(block_bytes);
 		let header = block.header_view();
@@ -570,11 +600,11 @@ impl BlockChain {
 					_ => {
 						let retracted = route.blocks.iter().take(route.index).cloned().collect::<Vec<H256>>();
 
-						BlockLocation::BranchBecomingCanonChain {
+						BlockLocation::BranchBecomingCanonChain(BranchBecomingCanonChainData {
 							ancestor: route.ancestor,
 							enacted: route.blocks.into_iter().skip(route.index).collect(),
 							retracted: retracted.into_iter().rev().collect(),
-						}
+						})
 					}
 				}
 			} else {
@@ -595,11 +625,11 @@ impl BlockChain {
 			BlockLocation::CanonChain => {
 				block_hashes.insert(number, info.hash.clone());
 			},
-			BlockLocation::BranchBecomingCanonChain { ref ancestor, ref enacted, .. } => {
-				let ancestor_number = self.block_number(ancestor).unwrap();
+			BlockLocation::BranchBecomingCanonChain(ref data) => {
+				let ancestor_number = self.block_number(&data.ancestor).unwrap();
 				let start_number = ancestor_number + 1;
 
-				for (index, hash) in enacted.iter().cloned().enumerate() {
+				for (index, hash) in data.enacted.iter().cloned().enumerate() {
 					block_hashes.insert(start_number + index as BlockNumber, hash);
 				}
 
@@ -674,44 +704,38 @@ impl BlockChain {
 	/// Later, BloomIndexer is used to map bloom location on filter layer (BloomIndex)
 	/// to bloom location in database (BlocksBloomLocation).
 	///
-	fn prepare_block_blooms_update(&self, block_bytes: &[u8], info: &BlockInfo) -> HashMap<H256, BlocksBlooms> {
+	fn prepare_block_blooms_update(&self, block_bytes: &[u8], info: &BlockInfo) -> HashMap<LogGroupPosition, BloomGroup> {
 		let block = BlockView::new(block_bytes);
 		let header = block.header_view();
 
-		let modified_blooms = match info.location {
+		let log_blooms = match info.location {
 			BlockLocation::Branch => HashMap::new(),
 			BlockLocation::CanonChain => {
-				ChainFilter::new(self, self.bloom_indexer.index_size(), self.bloom_indexer.levels())
-					.add_bloom(&header.log_bloom(), header.number() as usize)
+				let chain = bc::group::BloomGroupChain::new(self.blooms_config, self);
+				chain.insert(info.number as bc::Number, Bloom::from(header.log_bloom()).into())
 			},
-			BlockLocation::BranchBecomingCanonChain { ref ancestor, ref enacted, .. } => {
-				let ancestor_number = self.block_number(ancestor).unwrap();
+			BlockLocation::BranchBecomingCanonChain(ref data) => {
+				let ancestor_number = self.block_number(&data.ancestor).unwrap();
 				let start_number = ancestor_number + 1;
+				let range = start_number as bc::Number..self.best_block_number() as bc::Number;
 
-				let mut blooms: Vec<H2048> = enacted.iter()
+				let mut blooms: Vec<bc::Bloom> = data.enacted.iter()
 					.map(|hash| self.block(hash).unwrap())
 					.map(|bytes| BlockView::new(&bytes).header_view().log_bloom())
+					.map(Bloom::from)
+					.map(Into::into)
 					.collect();
 
-				blooms.push(header.log_bloom());
+				blooms.push(Bloom::from(header.log_bloom()).into());
 
-				ChainFilter::new(self, self.bloom_indexer.index_size(), self.bloom_indexer.levels())
-					.reset_chain_head(&blooms, start_number as usize, self.best_block_number() as usize)
+				let chain = bc::group::BloomGroupChain::new(self.blooms_config, self);
+				chain.replace(&range, blooms)
 			}
 		};
 
-		modified_blooms.into_iter()
-			.fold(HashMap::new(), | mut acc, (bloom_index, bloom) | {
-			{
-				let location = self.bloom_indexer.location(&bloom_index);
-				let mut blocks_blooms = acc
-					.entry(location.hash.clone())
-					.or_insert_with(|| self.blocks_blooms(&location.hash).unwrap_or_else(BlocksBlooms::new));
-				assert_eq!(self.bloom_indexer.index_size(), blocks_blooms.blooms.len());
-				blocks_blooms.blooms[location.index] = bloom;
-			}
-			acc
-		})
+		log_blooms.into_iter()
+			.map(|p| (From::from(p.0), From::from(p.1)))
+			.collect()
 	}
 
 	/// Get best block hash.
@@ -729,54 +753,14 @@ impl BlockChain {
 		self.best_block.read().unwrap().total_difficulty
 	}
 
-	/// Get block blooms.
-	fn blocks_blooms(&self, hash: &H256) -> Option<BlocksBlooms> {
-		self.query_extras(hash, &self.blocks_blooms)
-	}
-
-	fn query_extras<K, T>(&self, hash: &K, cache: &RwLock<HashMap<K, T>>) -> Option<T> where
-		T: Clone + Decodable + ExtrasIndexable,
-		K: ExtrasSliceConvertable + Eq + Hash + Clone {
-		{
-			let read = cache.read().unwrap();
-			if let Some(v) = read.get(hash) {
-				return Some(v.clone());
-			}
-		}
-
-		if let Some(h) = hash.as_h256() {
-			self.note_used(CacheID::Extras(T::extras_index(), h.clone()));
-		}
-
-		self.extras_db.get_extras(hash).map(| t: T | {
-			let mut write = cache.write().unwrap();
-			write.insert(hash.clone(), t.clone());
-			t
-		})
-	}
-
-	fn query_extras_exist<K, T>(&self, hash: &K, cache: &RwLock<HashMap<K, T>>) -> bool where
-		K: ExtrasSliceConvertable + Eq + Hash + Clone,
-		T: ExtrasIndexable {
-		{
-			let read = cache.read().unwrap();
-			if let Some(_) = read.get(hash) {
-				return true;
-			}
-		}
-
-		self.extras_db.extras_exists::<_, T>(hash)
-	}
-
 	/// Get current cache size.
 	pub fn cache_size(&self) -> CacheSize {
 		CacheSize {
 			blocks: self.blocks.read().unwrap().heap_size_of_children(),
 			block_details: self.block_details.read().unwrap().heap_size_of_children(),
 			transaction_addresses: self.transaction_addresses.read().unwrap().heap_size_of_children(),
-			block_logs: self.block_logs.read().unwrap().heap_size_of_children(),
 			blocks_blooms: self.blocks_blooms.read().unwrap().heap_size_of_children(),
-			block_receipts: self.block_receipts.read().unwrap().heap_size_of_children()
+			block_receipts: self.block_receipts.read().unwrap().heap_size_of_children(),
 		}
 	}
 
@@ -805,7 +789,6 @@ impl BlockChain {
 				let mut block_details = self.block_details.write().unwrap();
 				let mut block_hashes = self.block_hashes.write().unwrap();
 				let mut transaction_addresses = self.transaction_addresses.write().unwrap();
-				let mut block_logs = self.block_logs.write().unwrap();
 				let mut blocks_blooms = self.blocks_blooms.write().unwrap();
 				let mut block_receipts = self.block_receipts.write().unwrap();
 				let mut cache_man = self.cache_man.write().unwrap();
@@ -814,12 +797,11 @@ impl BlockChain {
 					cache_man.in_use.remove(&id);
 					match id {
 						CacheID::Block(h) => { blocks.remove(&h); },
-						CacheID::Extras(ExtrasIndex::BlockDetails, h) => { block_details.remove(&h); },
-						CacheID::Extras(ExtrasIndex::TransactionAddress, h) => { transaction_addresses.remove(&h); },
-						CacheID::Extras(ExtrasIndex::BlockLogBlooms, h) => { block_logs.remove(&h); },
-						CacheID::Extras(ExtrasIndex::BlocksBlooms, h) => { blocks_blooms.remove(&h); },
-						CacheID::Extras(ExtrasIndex::BlockReceipts, h) => { block_receipts.remove(&h); },
-						_ => panic!(),
+						CacheID::BlockDetails(h) => { block_details.remove(&h); }
+						CacheID::BlockHashes(h) => { block_hashes.remove(&h); }
+						CacheID::TransactionAddresses(h) => { transaction_addresses.remove(&h); }
+						CacheID::BlocksBlooms(h) => { blocks_blooms.remove(&h); }
+						CacheID::BlockReceipts(h) => { block_receipts.remove(&h); }
 					}
 				}
 				cache_man.cache_usage.push_front(HashSet::new());
@@ -831,7 +813,6 @@ impl BlockChain {
 				block_details.shrink_to_fit();
  				block_hashes.shrink_to_fit();
  				transaction_addresses.shrink_to_fit();
- 				block_logs.shrink_to_fit();
  				blocks_blooms.shrink_to_fit();
  				block_receipts.shrink_to_fit();
 			}
@@ -844,11 +825,12 @@ impl BlockChain {
 
 #[cfg(test)]
 mod tests {
+	#![cfg_attr(feature="dev", allow(similar_names))]
 	use std::str::FromStr;
 	use rustc_serialize::hex::FromHex;
 	use util::hash::*;
 	use util::sha3::Hashable;
-	use blockchain::{BlockProvider, BlockChain, BlockChainConfig, ImportRoute};
+	use blockchain::{BlockProvider, BlockChain, Config, ImportRoute};
 	use tests::helpers::*;
 	use devtools::*;
 	use blockchain::generator::{ChainGenerator, ChainIterator, BlockFinalizer};
@@ -864,7 +846,7 @@ mod tests {
 		let first_hash = BlockView::new(&first).header_view().sha3();
 
 		let temp = RandomTempPath::new();
-		let bc = BlockChain::new(BlockChainConfig::default(), &genesis, temp.as_path());
+		let bc = BlockChain::new(Config::default(), &genesis, temp.as_path());
 
 		assert_eq!(bc.genesis_hash(), genesis_hash.clone());
 		assert_eq!(bc.best_block_number(), 0);
@@ -892,7 +874,7 @@ mod tests {
 		let genesis_hash = BlockView::new(&genesis).header_view().sha3();
 
 		let temp = RandomTempPath::new();
-		let bc = BlockChain::new(BlockChainConfig::default(), &genesis, temp.as_path());
+		let bc = BlockChain::new(Config::default(), &genesis, temp.as_path());
 
 		let mut block_hashes = vec![genesis_hash.clone()];
 		for _ in 0..10 {
@@ -924,7 +906,7 @@ mod tests {
 		let b5a = canon_chain.generate(&mut finalizer).unwrap();
 
 		let temp = RandomTempPath::new();
-		let bc = BlockChain::new(BlockChainConfig::default(), &genesis, temp.as_path());
+		let bc = BlockChain::new(Config::default(), &genesis, temp.as_path());
 		bc.insert_block(&b1a, vec![]);
 		bc.insert_block(&b1b, vec![]);
 		bc.insert_block(&b2a, vec![]);
@@ -965,7 +947,7 @@ mod tests {
 		let best_block_hash = b3a_hash.clone();
 
 		let temp = RandomTempPath::new();
-		let bc = BlockChain::new(BlockChainConfig::default(), &genesis, temp.as_path());
+		let bc = BlockChain::new(Config::default(), &genesis, temp.as_path());
 		let ir1 = bc.insert_block(&b1, vec![]);
 		let ir2 = bc.insert_block(&b2, vec![]);
 		let ir3b = bc.insert_block(&b3b, vec![]);
@@ -974,21 +956,25 @@ mod tests {
 		assert_eq!(ir1, ImportRoute {
 			enacted: vec![b1_hash],
 			retracted: vec![],
+			omitted: vec![],
 		});
 
 		assert_eq!(ir2, ImportRoute {
 			enacted: vec![b2_hash],
 			retracted: vec![],
+			omitted: vec![],
 		});
 
 		assert_eq!(ir3b, ImportRoute {
 			enacted: vec![b3b_hash],
 			retracted: vec![],
+			omitted: vec![],
 		});
 
 		assert_eq!(ir3a, ImportRoute {
 			enacted: vec![b3a_hash],
 			retracted: vec![b3b_hash],
+			omitted: vec![],
 		});
 
 		assert_eq!(bc.best_block_hash(), best_block_hash);
@@ -1066,14 +1052,14 @@ mod tests {
 
 		let temp = RandomTempPath::new();
 		{
-			let bc = BlockChain::new(BlockChainConfig::default(), &genesis, temp.as_path());
+			let bc = BlockChain::new(Config::default(), &genesis, temp.as_path());
 			assert_eq!(bc.best_block_hash(), genesis_hash);
 			bc.insert_block(&first, vec![]);
 			assert_eq!(bc.best_block_hash(), first_hash);
 		}
 
 		{
-			let bc = BlockChain::new(BlockChainConfig::default(), &genesis, temp.as_path());
+			let bc = BlockChain::new(Config::default(), &genesis, temp.as_path());
 			assert_eq!(bc.best_block_hash(), first_hash);
 		}
 	}
@@ -1126,7 +1112,7 @@ mod tests {
 		let b1_hash = H256::from_str("f53f268d23a71e85c7d6d83a9504298712b84c1a2ba220441c86eeda0bf0b6e3").unwrap();
 
 		let temp = RandomTempPath::new();
-		let bc = BlockChain::new(BlockChainConfig::default(), &genesis, temp.as_path());
+		let bc = BlockChain::new(Config::default(), &genesis, temp.as_path());
 		bc.insert_block(&b1, vec![]);
 
 		let transactions = bc.transactions(&b1_hash).unwrap();
@@ -1157,7 +1143,7 @@ mod tests {
 		let b2a = canon_chain.with_bloom(bloom_ba.clone()).generate(&mut finalizer).unwrap();
 
 		let temp = RandomTempPath::new();
-		let bc = BlockChain::new(BlockChainConfig::default(), &genesis, temp.as_path());
+		let bc = BlockChain::new(Config::default(), &genesis, temp.as_path());
 
 		let blocks_b1 = bc.blocks_with_bloom(&bloom_b1, 0, 5);
 		let blocks_b2 = bc.blocks_with_bloom(&bloom_b2, 0, 5);
@@ -1203,4 +1189,31 @@ mod tests {
 		assert_eq!(blocks_b2, vec![2]);
 		assert_eq!(blocks_ba, vec![3]);
 	}
+
+	#[test]
+	fn test_best_block_update() {
+		let mut canon_chain = ChainGenerator::default();
+		let mut finalizer = BlockFinalizer::default();
+		let genesis = canon_chain.generate(&mut finalizer).unwrap();
+
+		let temp = RandomTempPath::new();
+
+		{
+			let bc = BlockChain::new(Config::default(), &genesis, temp.as_path());
+			let uncle = canon_chain.fork(1).generate(&mut finalizer.fork()).unwrap();
+
+			// create a longer fork
+			for _ in 0..5 {
+				let canon_block = canon_chain.generate(&mut finalizer).unwrap();
+				bc.insert_block(&canon_block, vec![]);
+			}
+
+			assert_eq!(bc.best_block_number(), 5);
+			bc.insert_block(&uncle, vec![]);
+		}
+
+		// re-loading the blockchain should load the correct best block.
+		let bc = BlockChain::new(Config::default(), &genesis, temp.as_path());
+		assert_eq!(bc.best_block_number(), 5);
+	}
 }

ethcore/src/blockchain/bloom_indexer.rs

@@ -1,102 +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/>.
-
-use util::numbers::H256;
-use chainfilter::BloomIndex;
-
-/// Represents location of block bloom in extras database.
-#[derive(Debug, PartialEq)]
-pub struct BlocksBloomLocation {
-	/// Unique hash of BlocksBloom
-	pub hash: H256,
-	/// Index within BlocksBloom
-	pub index: usize,
-}
-
-/// Should be used to localize blocks blooms in extras database.
-pub struct BloomIndexer {
-	index_size: usize,
-	levels: u8,
-}
-
-impl BloomIndexer {
-	/// Plain constructor.
-	pub fn new(index_size: usize, levels: u8) -> Self {
-		BloomIndexer {
-			index_size: index_size,
-			levels: levels
-		}
-	}
-
-	/// Calculates bloom's position in database.
-	pub fn location(&self, bloom_index: &BloomIndex) -> BlocksBloomLocation {
-		use std::{mem, ptr};
-
-		let hash = unsafe {
-			let mut hash: H256 = mem::zeroed();
-			ptr::copy(&[bloom_index.index / self.index_size] as *const usize as *const u8, hash.as_mut_ptr(), 8);
-			hash[8] = bloom_index.level;
-			hash.reverse();
-			hash
-		};
-
-		BlocksBloomLocation {
-			hash: hash,
-			index: bloom_index.index % self.index_size
-		}
-	}
-
-	/// Returns index size.
-	pub fn index_size(&self) -> usize {
-		self.index_size
-	}
-
-	/// Returns number of cache levels.
-	pub fn levels(&self) -> u8 {
-		self.levels
-	}
-}
-
-#[cfg(test)]
-mod tests {
-	use std::str::FromStr;
-	use util::hash::{H256, FixedHash};
-	use chainfilter::BloomIndex;
-	use blockchain::bloom_indexer::{BloomIndexer, BlocksBloomLocation};
-
-	#[test]
-	fn test_bloom_indexer() {
-		let bi = BloomIndexer::new(16, 3);
-
-		let index = BloomIndex::new(0, 0);
-		assert_eq!(bi.location(&index), BlocksBloomLocation {
-			hash: H256::new(),
-			index: 0
-		});
-
-		let index = BloomIndex::new(1, 0);
-		assert_eq!(bi.location(&index), BlocksBloomLocation {
-			hash: H256::from_str("0000000000000000000000000000000000000000000000010000000000000000").unwrap(),
-			index: 0
-		});
-
-		let index = BloomIndex::new(0, 299_999);
-		assert_eq!(bi.location(&index), BlocksBloomLocation {
-			hash: H256::from_str("000000000000000000000000000000000000000000000000000000000000493d").unwrap(),
-			index: 15
-		});
-	}
-}

ethcore/src/blockchain/cache.rs

@@ -23,8 +23,6 @@ pub struct CacheSize {
 	pub block_details: usize,
 	/// Transaction addresses cache size.
 	pub transaction_addresses: usize,
-	/// Logs cache size.
-	pub block_logs: usize,
 	/// Blooms cache size.
 	pub blocks_blooms: usize,
 	/// Block receipts size.
@@ -33,5 +31,7 @@ pub struct CacheSize {
 
 impl CacheSize {
 	/// Total amount used by the cache.
-	pub fn total(&self) -> usize { self.blocks + self.block_details + self.transaction_addresses + self.block_logs + self.blocks_blooms }
+	pub fn total(&self) -> usize {
+		self.blocks + self.block_details + self.transaction_addresses + self.blocks_blooms + self.block_receipts
+	}
 }

ethcore/src/blockchain/config.rs

@@ -0,0 +1,39 @@
+// 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/>.
+
+//! Blockchain configuration.
+
+/// Blockchain configuration.
+#[derive(Debug)]
+pub struct Config {
+	/// Preferred cache size in bytes.
+	pub pref_cache_size: usize,
+	/// Maximum cache size in bytes.
+	pub max_cache_size: usize,
+	/// Backing db cache_size
+	pub db_cache_size: Option<usize>,
+}
+
+impl Default for Config {
+	fn default() -> Self {
+		Config {
+			pref_cache_size: 1 << 14,
+			max_cache_size: 1 << 20,
+			db_cache_size: None,
+		}
+	}
+}
+

ethcore/src/blockchain/extras.rs

@@ -0,0 +1,243 @@
+// 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/>.
+
+//! Blockchain DB extras.
+
+use bloomchain;
+use util::*;
+use header::BlockNumber;
+use receipt::Receipt;
+use db::Key;
+use blooms::{GroupPosition, BloomGroup};
+
+/// Represents index of extra data in database
+#[derive(Copy, Debug, Hash, Eq, PartialEq, Clone)]
+pub enum ExtrasIndex {
+	/// Block details index
+	BlockDetails = 0,
+	/// Block hash index
+	BlockHash = 1,
+	/// Transaction address index
+	TransactionAddress = 2,
+	/// Block blooms index
+	BlocksBlooms = 3,
+	/// Block receipts index
+	BlockReceipts = 4,
+}
+
+fn with_index(hash: &H256, i: ExtrasIndex) -> H264 {
+	let mut result = H264::default();
+	result[0] = i as u8;
+	result.deref_mut()[1..].clone_from_slice(hash);
+	result
+}
+
+pub struct BlockNumberKey([u8; 5]);
+
+impl Deref for BlockNumberKey {
+	type Target = [u8];
+
+	fn deref(&self) -> &Self::Target {
+		&self.0
+	}
+}
+
+impl Key<H256> for BlockNumber {
+	type Target = BlockNumberKey;
+
+	fn key(&self) -> Self::Target {
+		let mut result = [0u8; 5];
+		result[0] = ExtrasIndex::BlockHash as u8;
+		result[1] = (self >> 24) as u8;
+		result[2] = (self >> 16) as u8;
+		result[3] = (self >> 8) as u8;
+		result[4] = *self as u8;
+		BlockNumberKey(result)
+	}
+}
+
+impl Key<BlockDetails> for H256 {
+	type Target = H264;
+
+	fn key(&self) -> H264 {
+		with_index(self, ExtrasIndex::BlockDetails)
+	}
+}
+
+pub struct LogGroupKey([u8; 6]);
+
+impl Deref for LogGroupKey {
+	type Target = [u8];
+
+	fn deref(&self) -> &Self::Target {
+		&self.0
+	}
+}
+
+#[derive(Debug, PartialEq, Eq, Hash, Clone)]
+pub struct LogGroupPosition(GroupPosition);
+
+impl From<bloomchain::group::GroupPosition> for LogGroupPosition {
+	fn from(position: bloomchain::group::GroupPosition) -> Self {
+		LogGroupPosition(From::from(position))
+	}
+}
+
+impl HeapSizeOf for LogGroupPosition {
+	fn heap_size_of_children(&self) -> usize {
+		self.0.heap_size_of_children()
+	}
+}
+
+impl Key<BloomGroup> for LogGroupPosition {
+	type Target = LogGroupKey;
+
+	fn key(&self) -> Self::Target {
+		let mut result = [0u8; 6];
+		result[0] = ExtrasIndex::BlocksBlooms as u8;
+		result[1] = self.0.level;
+		result[2] = (self.0.index >> 24) as u8;
+		result[3] = (self.0.index >> 16) as u8;
+		result[4] = (self.0.index >> 8) as u8;
+		result[5] = self.0.index as u8;
+		LogGroupKey(result)
+	}
+}
+
+impl Key<TransactionAddress> for H256 {
+	type Target = H264;
+
+	fn key(&self) -> H264 {
+		with_index(self, ExtrasIndex::TransactionAddress)
+	}
+}
+
+impl Key<BlockReceipts> for H256 {
+	type Target = H264;
+
+	fn key(&self) -> H264 {
+		with_index(self, ExtrasIndex::BlockReceipts)
+	}
+}
+
+/// Familial details concerning a block
+#[derive(Debug, Clone)]
+pub struct BlockDetails {
+	/// Block number
+	pub number: BlockNumber,
+	/// Total difficulty of the block and all its parents
+	pub total_difficulty: U256,
+	/// Parent block hash
+	pub parent: H256,
+	/// List of children block hashes
+	pub children: Vec<H256>
+}
+
+impl HeapSizeOf for BlockDetails {
+	fn heap_size_of_children(&self) -> usize {
+		self.children.heap_size_of_children()
+	}
+}
+
+impl Decodable for BlockDetails {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		let d = decoder.as_rlp();
+		let details = BlockDetails {
+			number: try!(d.val_at(0)),
+			total_difficulty: try!(d.val_at(1)),
+			parent: try!(d.val_at(2)),
+			children: try!(d.val_at(3)),
+		};
+		Ok(details)
+	}
+}
+
+impl Encodable for BlockDetails {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		s.begin_list(4);
+		s.append(&self.number);
+		s.append(&self.total_difficulty);
+		s.append(&self.parent);
+		s.append(&self.children);
+	}
+}
+
+/// Represents address of certain transaction within block
+#[derive(Clone)]
+pub struct TransactionAddress {
+	/// Block hash
+	pub block_hash: H256,
+	/// Transaction index within the block
+	pub index: usize
+}
+
+impl HeapSizeOf for TransactionAddress {
+	fn heap_size_of_children(&self) -> usize { 0 }
+}
+
+impl Decodable for TransactionAddress {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		let d = decoder.as_rlp();
+		let tx_address = TransactionAddress {
+			block_hash: try!(d.val_at(0)),
+			index: try!(d.val_at(1)),
+		};
+
+		Ok(tx_address)
+	}
+}
+
+impl Encodable for TransactionAddress {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		s.begin_list(2);
+		s.append(&self.block_hash);
+		s.append(&self.index);
+	}
+}
+
+/// Contains all block receipts.
+#[derive(Clone)]
+pub struct BlockReceipts {
+	pub receipts: Vec<Receipt>,
+}
+
+impl BlockReceipts {
+	pub fn new(receipts: Vec<Receipt>) -> Self {
+		BlockReceipts {
+			receipts: receipts
+		}
+	}
+}
+
+impl Decodable for BlockReceipts {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		Ok(BlockReceipts {
+			receipts: try!(Decodable::decode(decoder))
+		})
+	}
+}
+
+impl Encodable for BlockReceipts {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		s.append(&self.receipts);
+	}
+}
+
+impl HeapSizeOf for BlockReceipts {
+	fn heap_size_of_children(&self) -> usize {
+		self.receipts.heap_size_of_children()
+	}
+}

ethcore/src/blockchain/import_route.rs

@@ -26,6 +26,8 @@ pub struct ImportRoute {
 	pub retracted: Vec<H256>,
 	/// Blocks that were validated by new block.
 	pub enacted: Vec<H256>,
+	/// Blocks which are neither retracted nor enacted.
+	pub omitted: Vec<H256>,
 }
 
 impl ImportRoute {
@@ -33,6 +35,7 @@ impl ImportRoute {
 		ImportRoute {
 			retracted: vec![],
 			enacted: vec![],
+			omitted: vec![],
 		}
 	}
 }
@@ -43,13 +46,19 @@ impl From<BlockInfo> for ImportRoute {
 			BlockLocation::CanonChain => ImportRoute {
 				retracted: vec![],
 				enacted: vec![info.hash],
+				omitted: vec![],
 			},
-			BlockLocation::Branch => ImportRoute::none(),
-			BlockLocation::BranchBecomingCanonChain { mut enacted, retracted, .. } => {
-				enacted.push(info.hash);
+			BlockLocation::Branch => ImportRoute {
+				retracted: vec![],
+				enacted: vec![],
+				omitted: vec![info.hash],
+			},
+			BlockLocation::BranchBecomingCanonChain(mut data) => {
+				data.enacted.push(info.hash);
 				ImportRoute {
-					retracted: retracted,
-					enacted: enacted,
+					retracted: data.retracted,
+					enacted: data.enacted,
+					omitted: vec![],
 				}
 			}
 		}
@@ -60,7 +69,7 @@ impl From<BlockInfo> for ImportRoute {
 mod tests {
 	use util::hash::H256;
 	use util::numbers::U256;
-	use blockchain::block_info::{BlockInfo, BlockLocation};
+	use blockchain::block_info::{BlockInfo, BlockLocation, BranchBecomingCanonChainData};
 	use blockchain::ImportRoute;
 
 	#[test]
@@ -68,6 +77,7 @@ mod tests {
 		assert_eq!(ImportRoute::none(), ImportRoute {
 			enacted: vec![],
 			retracted: vec![],
+			omitted: vec![],
 		});
 	}
 
@@ -80,7 +90,11 @@ mod tests {
 			location: BlockLocation::Branch,
 		};
 
-		assert_eq!(ImportRoute::from(info), ImportRoute::none());
+		assert_eq!(ImportRoute::from(info), ImportRoute {
+			retracted: vec![],
+			enacted: vec![],
+			omitted: vec![H256::from(U256::from(1))],
+		});
 	}
 
 	#[test]
@@ -95,6 +109,7 @@ mod tests {
 		assert_eq!(ImportRoute::from(info), ImportRoute {
 			retracted: vec![],
 			enacted: vec![H256::from(U256::from(1))],
+			omitted: vec![],
 		});
 	}
 
@@ -104,16 +119,17 @@ mod tests {
 			hash: H256::from(U256::from(2)),
 			number: 0,
 			total_difficulty: U256::from(0),
-			location: BlockLocation::BranchBecomingCanonChain {
-			ancestor: H256::from(U256::from(0)),
+			location: BlockLocation::BranchBecomingCanonChain(BranchBecomingCanonChainData {
+				ancestor: H256::from(U256::from(0)),
 				enacted: vec![H256::from(U256::from(1))],
 				retracted: vec![H256::from(U256::from(3)), H256::from(U256::from(4))],
-			}
+			})
 		};
 
 		assert_eq!(ImportRoute::from(info), ImportRoute {
 			retracted: vec![H256::from(U256::from(3)), H256::from(U256::from(4))],
 			enacted: vec![H256::from(U256::from(1)), H256::from(U256::from(2))],
+			omitted: vec![],
 		});
 	}
 }

ethcore/src/blockchain/mod.rs

@@ -16,18 +16,20 @@
 
 //! Blockchain database.
 
-pub mod blockchain;
 mod best_block;
 mod block_info;
-mod bloom_indexer;
+pub mod blockchain;
 mod cache;
-mod tree_route;
-mod update;
+mod config;
+pub mod extras;
 mod import_route;
+mod update;
+
 #[cfg(test)]
 mod generator;
 
-pub use self::blockchain::{BlockProvider, BlockChain, BlockChainConfig};
+pub use self::blockchain::{BlockProvider, BlockChain};
 pub use self::cache::CacheSize;
-pub use self::tree_route::TreeRoute;
+pub use self::config::Config;
+pub use types::tree_route::TreeRoute;
 pub use self::import_route::ImportRoute;

ethcore/src/blockchain/update.rs

@@ -2,7 +2,8 @@ use std::collections::HashMap;
 use util::numbers::H256;
 use header::BlockNumber;
 use blockchain::block_info::BlockInfo;
-use extras::{BlockDetails, BlockReceipts, TransactionAddress, BlocksBlooms};
+use blooms::BloomGroup;
+use super::extras::{BlockDetails, BlockReceipts, TransactionAddress, LogGroupPosition};
 
 /// Block extras update info.
 pub struct ExtrasUpdate {
@@ -17,5 +18,5 @@ pub struct ExtrasUpdate {
 	/// Modified transaction addresses.
 	pub transactions_addresses: HashMap<H256, TransactionAddress>,
 	/// Modified blocks blooms.
-	pub blocks_blooms: HashMap<H256, BlocksBlooms>,
+	pub blocks_blooms: HashMap<LogGroupPosition, BloomGroup>,
 }

ethcore/src/blooms/bloom.rs

@@ -0,0 +1,62 @@
+// 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/>.
+
+use bloomchain as bc;
+use util::rlp::*;
+use util::HeapSizeOf;
+use basic_types::LogBloom;
+
+/// Helper structure representing bloom of the trace.
+#[derive(Debug, Clone)]
+pub struct Bloom(LogBloom);
+
+impl From<LogBloom> for Bloom {
+	fn from(bloom: LogBloom) -> Self {
+		Bloom(bloom)
+	}
+}
+
+impl From<bc::Bloom> for Bloom {
+	fn from(bloom: bc::Bloom) -> Self {
+		let bytes: [u8; 256] = bloom.into();
+		Bloom(LogBloom::from(bytes))
+	}
+}
+
+impl Into<bc::Bloom> for Bloom {
+	fn into(self) -> bc::Bloom {
+		let log = self.0;
+		bc::Bloom::from(log.0)
+	}
+}
+
+impl Decodable for Bloom {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		Decodable::decode(decoder).map(Bloom)
+	}
+}
+
+impl Encodable for Bloom {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		Encodable::rlp_append(&self.0, s)
+	}
+}
+
+impl HeapSizeOf for Bloom {
+	fn heap_size_of_children(&self) -> usize {
+		0
+	}
+}

ethcore/src/blooms/bloom_group.rs

@@ -0,0 +1,74 @@
+// 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/>.
+
+use bloomchain::group as bc;
+use util::rlp::*;
+use util::HeapSizeOf;
+use super::Bloom;
+
+/// Represents group of X consecutive blooms.
+#[derive(Debug, Clone)]
+pub struct BloomGroup {
+	blooms: Vec<Bloom>,
+}
+
+impl From<bc::BloomGroup> for BloomGroup {
+	fn from(group: bc::BloomGroup) -> Self {
+		let blooms = group.blooms
+			.into_iter()
+			.map(From::from)
+			.collect();
+
+		BloomGroup {
+			blooms: blooms
+		}
+	}
+}
+
+impl Into<bc::BloomGroup> for BloomGroup {
+	fn into(self) -> bc::BloomGroup {
+		let blooms = self.blooms
+			.into_iter()
+			.map(Into::into)
+			.collect();
+
+		bc::BloomGroup {
+			blooms: blooms
+		}
+	}
+}
+
+impl Decodable for BloomGroup {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		let blooms = try!(Decodable::decode(decoder));
+		let group = BloomGroup {
+			blooms: blooms
+		};
+		Ok(group)
+	}
+}
+
+impl Encodable for BloomGroup {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		Encodable::rlp_append(&self.blooms, s)
+	}
+}
+
+impl HeapSizeOf for BloomGroup {
+	fn heap_size_of_children(&self) -> usize {
+		self.blooms.heap_size_of_children()
+	}
+}

ethcore/src/blooms/group_position.rs

@@ -14,27 +14,29 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-//! Represents bloom index in cache
+use bloomchain::group as bc;
+use util::HeapSizeOf;
 
-/// Represents bloom index in cache
-/// 
-/// On cache level 0, every block bloom is represented by different index.
-/// On higher cache levels, multiple block blooms are represented by one
-/// index. Their `BloomIndex` can be created from block number and given level.
-#[derive(Eq, PartialEq, Hash, Clone, Debug)]
-pub struct BloomIndex {
-	/// Bloom level
+/// Represents `BloomGroup` position in database.
+#[derive(PartialEq, Eq, Hash, Clone, Debug)]
+pub struct GroupPosition {
+	/// Bloom level.
 	pub level: u8,
-	///  Filter Index
-	pub index: usize,
+	/// Group index.
+	pub index: u32,
 }
 
-impl BloomIndex {
-	/// Default constructor for `BloomIndex`
-	pub fn new(level: u8, index: usize) -> BloomIndex {
-		BloomIndex {
-			level: level,
-			index: index,
+impl From<bc::GroupPosition> for GroupPosition {
+	fn from(p: bc::GroupPosition) -> Self {
+		GroupPosition {
+			level: p.level as u8,
+			index: p.index as u32,
 		}
 	}
 }
+
+impl HeapSizeOf for GroupPosition {
+	fn heap_size_of_children(&self) -> usize {
+		0
+	}
+}

ethcore/src/blooms/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/>.
+
+//! Bridge between bloomchain crate types and ethcore.
+
+mod bloom;
+mod bloom_group;
+mod group_position;
+
+pub use self::bloom::Bloom;
+pub use self::bloom_group::BloomGroup;
+pub use self::group_position::GroupPosition;

ethcore/src/builtin.rs

@@ -18,8 +18,9 @@ use util::*;
 use crypto::sha2::Sha256;
 use crypto::ripemd160::Ripemd160;
 use crypto::digest::Digest;
+use ethjson;
 
-/// Definition of a contract whose implementation is built-in. 
+/// Definition of a contract whose implementation is built-in.
 pub struct Builtin {
 	/// The gas cost of running this built-in for the given size of input data.
 	pub cost: Box<Fn(usize) -> U256>,	// TODO: U256 should be bignum.
@@ -46,13 +47,12 @@ impl Builtin {
 	}
 
 	/// Create a new object from a builtin-function name with a linear cost associated with input size.
-	pub fn from_named_linear(name: &str, base_cost: usize, word_cost: usize) -> Option<Builtin> {
-		new_builtin_exec(name).map(|b| {
-			let cost = Box::new(move|s: usize| -> U256 {
-				U256::from(base_cost) + U256::from(word_cost) * U256::from((s + 31) / 32)
-			});
-			Self::new(cost, b)
-		})
+	pub fn from_named_linear(name: &str, base_cost: usize, word_cost: usize) -> Builtin {
+		let cost = Box::new(move|s: usize| -> U256 {
+			U256::from(base_cost) + U256::from(word_cost) * U256::from((s + 31) / 32)
+		});
+
+		Self::new(cost, new_builtin_exec(name))
 	}
 
 	/// Simple forwarder for cost.
@@ -60,22 +60,15 @@ impl Builtin {
 
 	/// Simple forwarder for execute.
 	pub fn execute(&self, input: &[u8], output: &mut[u8]) { (*self.execute)(input, output); }
+}
 
-	/// Create a builtin from JSON.
-	///
-	/// JSON must be of the form `{ "name": "identity", "linear": {"base": 10, "word": 20} }`.
-	pub fn from_json(json: &Json) -> Option<Builtin> {
-		// NICE: figure out a more convenient means of handing errors here.
-		if let Json::String(ref name) = json["name"] {
-			if let Json::Object(ref o) = json["linear"] {
-				if let Json::U64(ref word) = o["word"] {
-					if let Json::U64(ref base) = o["base"] {
-						return Self::from_named_linear(&name[..], *base as usize, *word as usize);
-					}
-				}
+impl From<ethjson::spec::Builtin> for Builtin {
+	fn from(b: ethjson::spec::Builtin) -> Self {
+		match b.pricing {
+			ethjson::spec::Pricing::Linear(linear) => {
+				Self::from_named_linear(b.name.as_ref(), linear.base, linear.word)
 			}
 		}
-		None
 	}
 }
 
@@ -90,14 +83,14 @@ pub fn copy_to(src: &[u8], dest: &mut[u8]) {
 
 /// Create a new builtin executor according to `name`.
 /// TODO: turn in to a factory with dynamic registration.
-pub fn new_builtin_exec(name: &str) -> Option<Box<Fn(&[u8], &mut [u8])>> {
+pub fn new_builtin_exec(name: &str) -> Box<Fn(&[u8], &mut [u8])> {
 	match name {
-		"identity" => Some(Box::new(move|input: &[u8], output: &mut[u8]| {
+		"identity" => Box::new(move|input: &[u8], output: &mut[u8]| {
 			for i in 0..min(input.len(), output.len()) {
 				output[i] = input[i];
 			}
-		})),
-		"ecrecover" => Some(Box::new(move|input: &[u8], output: &mut[u8]| {
+		}),
+		"ecrecover" => Box::new(move|input: &[u8], output: &mut[u8]| {
 			#[repr(packed)]
 			#[derive(Debug)]
 			struct InType {
@@ -120,8 +113,8 @@ pub fn new_builtin_exec(name: &str) -> Option<Box<Fn(&[u8], &mut [u8])>> {
 					}
 				}
 			}
-		})),
-		"sha256" => Some(Box::new(move|input: &[u8], output: &mut[u8]| {
+		}),
+		"sha256" => Box::new(move|input: &[u8], output: &mut[u8]| {
 			let mut sha = Sha256::new();
 			sha.input(input);
 			if output.len() >= 32 {
@@ -131,21 +124,23 @@ pub fn new_builtin_exec(name: &str) -> Option<Box<Fn(&[u8], &mut [u8])>> {
 				sha.result(ret.as_slice_mut());
 				copy_to(&ret, output);
 			}
-		})),
-		"ripemd160" => Some(Box::new(move|input: &[u8], output: &mut[u8]| {
+		}),
+		"ripemd160" => Box::new(move|input: &[u8], output: &mut[u8]| {
 			let mut sha = Ripemd160::new();
 			sha.input(input);
 			let mut ret = H256::new();
 			sha.result(&mut ret.as_slice_mut()[12..32]);
 			copy_to(&ret, output);
-		})),
-		_ => None
+		}),
+		_ => {
+			panic!("invalid builtin name {}", name);
+		}
 	}
 }
 
 #[test]
 fn identity() {
-	let f = new_builtin_exec("identity").unwrap();
+	let f = new_builtin_exec("identity");
 	let i = [0u8, 1, 2, 3];
 
 	let mut o2 = [255u8; 2];
@@ -165,7 +160,7 @@ fn identity() {
 #[test]
 fn sha256() {
 	use rustc_serialize::hex::FromHex;
-	let f = new_builtin_exec("sha256").unwrap();
+	let f = new_builtin_exec("sha256");
 	let i = [0u8; 0];
 
 	let mut o = [255u8; 32];
@@ -184,7 +179,7 @@ fn sha256() {
 #[test]
 fn ripemd160() {
 	use rustc_serialize::hex::FromHex;
-	let f = new_builtin_exec("ripemd160").unwrap();
+	let f = new_builtin_exec("ripemd160");
 	let i = [0u8; 0];
 
 	let mut o = [255u8; 32];
@@ -211,7 +206,7 @@ fn ecrecover() {
 	let s = k.sign(&m).unwrap();
 	println!("Signed: {}", s);*/
 
-	let f = new_builtin_exec("ecrecover").unwrap();
+	let f = new_builtin_exec("ecrecover");
 	let i = FromHex::from_hex("47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad000000000000000000000000000000000000000000000000000000000000001b650acf9d3f5f0a2c799776a1254355d5f4061762a237396a99a0e0e3fc2bcd6729514a0dacb2e623ac4abd157cb18163ff942280db4d5caad66ddf941ba12e03").unwrap();
 
 	let mut o = [255u8; 32];
@@ -258,9 +253,15 @@ fn ecrecover() {
 	assert_eq!(&o[..], &(FromHex::from_hex("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap())[..]);*/
 }
 
+#[test]
+#[should_panic]
+fn from_unknown_linear() {
+	let _ = Builtin::from_named_linear("dw", 10, 20);
+}
+
 #[test]
 fn from_named_linear() {
-	let b = Builtin::from_named_linear("identity", 10, 20).unwrap();
+	let b = Builtin::from_named_linear("identity", 10, 20);
 	assert_eq!((*b.cost)(0), U256::from(10));
 	assert_eq!((*b.cost)(1), U256::from(30));
 	assert_eq!((*b.cost)(32), U256::from(30));
@@ -274,9 +275,14 @@ fn from_named_linear() {
 
 #[test]
 fn from_json() {
-	let text = "{ \"name\": \"identity\", \"linear\": {\"base\": 10, \"word\": 20} }";
-	let json = Json::from_str(text).unwrap();
-	let b = Builtin::from_json(&json).unwrap();
+	let b = Builtin::from(ethjson::spec::Builtin {
+		name: "identity".to_owned(),
+		pricing: ethjson::spec::Pricing::Linear(ethjson::spec::Linear {
+			base: 10,
+			word: 20,
+		})
+	});
+
 	assert_eq!((*b.cost)(0), U256::from(10));
 	assert_eq!((*b.cost)(1), U256::from(30));
 	assert_eq!((*b.cost)(32), U256::from(30));

ethcore/src/chainfilter/blooms.txt

@@ -1,739 +0,0 @@
-300054 0x00000000000000000000000000000000000000000000020000001000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000008000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
-300059 0x00000020000000000000000000000000000000000000000002000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000040000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000400000000000000000000002000
-300221 0x00000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002020000000000000000000000000000000000000000000008000000001000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
-301826 0x00000020000000080000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000
-303166 0x00000000000000000000000000000000000000001000080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000808000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000020000000001000000000000000000000000000000000000000000000000000000000000000000
-303345 0x00000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002020000000000000000000000000000000000000000000008000000001000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
-303379 0x00000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000080000000000000000000000800000000000000001000000000000000000000000000000000000000000000000000000000000000000020000000000000000000800000000000000000000000000000080000000006000008000000000000000000080000000000000000000000000000000000000000001000000000000000000000008000000000400000000000000000000000000000000000000000000000000000000000000000000000000000020000000000000800000000000000000000000000000000000002004000000000000
-303388 0x00000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000080000000000000000000000800000040000000001000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000080000000006001008000000000000008000080000000000000000000000000000000000000000001000000000000000000000008000000000400000000000000000000000000000000000000000000000000000000000000000000000000000040000000000000800000000000000040000000000000000000002004000000000000
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ethcore/src/chainfilter/chainfilter.rs

@@ -1,197 +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/>.
-
-//! Multilevel blockchain bloom filter.
-//!
-//! ```not_run
-//! extern crate ethcore_util as util;
-//! extern crate ethcore;
-//! use std::str::FromStr;
-//! use util::sha3::*;
-//! use util::hash::*;
-//! use ethcore::chainfilter::*;
-//!
-//! fn main() {
-//!		let (index_size, bloom_levels) = (16, 3);
-//!		let mut cache = MemoryCache::new();
-//!
-//!		let address = Address::from_str("ef2d6d194084c2de36e0dabfce45d046b37d1106").unwrap();
-//!
-//!		// borrow cache for reading inside the scope
-//!		let modified_blooms = {
-//!			let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-//!			let block_number = 39;
-//!			let mut bloom = H2048::new();
-//!			bloom.shift_bloomed(&address.sha3());
-//!			filter.add_bloom(&bloom, block_number)
-//!		};
-//!
-//!		// number of updated blooms is equal number of levels
-//!		assert_eq!(modified_blooms.len(), bloom_levels as usize);
-//!
-//!		// lets inserts modified blooms into the cache
-//!		cache.insert_blooms(modified_blooms);
-//!
-//!		// borrow cache for another reading operations
-//!		{
-//!			let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-//!			let blocks = filter.blocks_with_address(&address, 10, 40);
-//!			assert_eq!(blocks.len(), 1);
-//!			assert_eq!(blocks[0], 39);
-//!		}
-//! }
-//! ```
-//!
-use std::collections::{HashMap};
-use util::hash::*;
-use chainfilter::{BloomIndex, FilterDataSource};
-use chainfilter::indexer::Indexer;
-
-/// Should be used for search operations on blockchain.
-pub struct ChainFilter<'a, D>
-	where D: FilterDataSource + 'a
-{
-	data_source: &'a D,
-	indexer: Indexer,
-}
-
-impl<'a, D> ChainFilter<'a, D> where D: FilterDataSource
-{
-	/// Creates new filter instance.
-	///
-	/// Borrows `FilterDataSource` for reading.
-	pub fn new(data_source: &'a D, index_size: usize, levels: u8) -> Self {
-		ChainFilter {
-			data_source: data_source,
-			indexer: Indexer::new(index_size, levels)
-		}
-	}
-
-	/// internal function which does bloom search recursively
-	fn blocks(&self, bloom: &H2048, from_block: usize, to_block: usize, level: u8, offset: usize) -> Option<Vec<usize>> {
-		let index = self.indexer.bloom_index(offset, level);
-
-		match self.data_source.bloom_at_index(&index) {
-			None => return None,
-			Some(level_bloom) => match level {
-				// if we are on the lowest level
-				0 => return match offset <= to_block {
-					// take the value if its smaller than to_block
-					true if level_bloom.contains(bloom) => Some(vec![offset]),
-					// return None if it is is equal to to_block
-					_ => None
-				},
-				// return None if current level doesnt contain given bloom
-				_ if !level_bloom.contains(bloom) => return None,
-				// continue processing && go down
-				_ => ()
-			}
-		};
-
-		let level_size = self.indexer.level_size(level - 1);
-		let from_index = self.indexer.bloom_index(from_block, level - 1);
-		let to_index = self.indexer.bloom_index(to_block, level - 1);
-		let res: Vec<usize> = self.indexer.lower_level_bloom_indexes(&index).into_iter()
-			// chose only blooms in range
-			.filter(|li| li.index >= from_index.index && li.index <= to_index.index)
-			// map them to offsets
-			.map(|li| li.index * level_size)
-			// get all blocks that may contain our bloom
-			// filter existing ones
-			.filter_map(|off| self.blocks(bloom, from_block, to_block, level - 1, off))
-			// flatten nested structures
-			.flat_map(|v| v)
-			.collect();
-		Some(res)
-	}
-
-	/// Adds new bloom to all filter levels
-	pub fn add_bloom(&self, bloom: &H2048, block_number: usize) -> HashMap<BloomIndex, H2048> {
-		let mut result: HashMap<BloomIndex, H2048> = HashMap::new();
-
-		for level in 0..self.indexer.levels() {
-			let bloom_index = self.indexer.bloom_index(block_number, level);
-			let new_bloom = match self.data_source.bloom_at_index(&bloom_index) {
-				Some(old_bloom) => old_bloom | bloom.clone(),
-				None => bloom.clone(),
-			};
-
-			result.insert(bloom_index, new_bloom);
-		}
-
-		result
-	}
-
-	/// Resets blooms at level 0 and forces rebuild on higher levels.
-	pub fn reset_chain_head(&self, blooms: &[H2048], block_number: usize, old_highest_block: usize) -> HashMap<BloomIndex, H2048> {
-		let mut result: HashMap<BloomIndex, H2048> = HashMap::new();
-
-		// insert all new blooms at level 0
-		for (i, bloom) in blooms.iter().enumerate() {
-			result.insert(self.indexer.bloom_index(block_number + i, 0), bloom.clone());
-		}
-
-		// reset the rest of blooms
-		for reset_number in block_number + blooms.len()..(old_highest_block + 1) {
-			result.insert(self.indexer.bloom_index(reset_number, 0), H2048::new());
-		}
-
-		for level in 1..self.indexer.levels() {
-			for i in 0..blooms.len() {
-
-				let index = self.indexer.bloom_index(block_number + i, level);
-				let new_bloom = {
-					// use new blooms before db blooms where necessary
-					let bloom_at = | index | { result.get(&index).cloned().or_else(|| self.data_source.bloom_at_index(&index)) };
-
-					self.indexer.lower_level_bloom_indexes(&index)
-						.into_iter()
-						// get blooms
-						// filter existing ones
-						.filter_map(bloom_at)
-						// BitOr all of them
-						.fold(H2048::new(), |acc, bloom| acc | bloom)
-				};
-
-				result.insert(index, new_bloom);
-			}
-		}
-
-		result
-	}
-
-	/// Returns numbers of blocks that may log bloom.
-	pub fn blocks_with_bloom(&self, bloom: &H2048, from_block: usize, to_block: usize) -> Vec<usize> {
-		let mut result = vec![];
-		// lets start from highest level
-		let max_level = self.indexer.max_level();
-		let level_size = self.indexer.level_size(max_level);
-		let from_index = self.indexer.bloom_index(from_block, max_level);
-		let to_index = self.indexer.bloom_index(to_block, max_level);
-
-		for index in from_index.index..to_index.index + 1 {
-			// offset will be used to calculate where we are right now
-			let offset = level_size * index;
-
-			// go doooown!
-			if let Some(blocks) = self.blocks(bloom, from_block, to_block, max_level, offset) {
-				result.extend(blocks);
-			}
-		}
-
-		result
-	}
-}

ethcore/src/chainfilter/indexer.rs

@@ -1,154 +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/>.
-
-//! Simplifies working with bloom indexes.
-
-use chainfilter::BloomIndex;
-
-/// Simplifies working with bloom indexes.
-pub struct Indexer {
-	index_size: usize,
-	level_sizes: Vec<usize>,
-}
-
-impl Indexer {
-	/// Creates new indexer.
-	pub fn new(index_size: usize, levels: u8) -> Self {
-		if levels == 0 {
-			panic!("Indexer requires at least 1 level.");
-		}
-
-		let mut level_sizes = vec![1];
-		level_sizes.extend_from_slice(&(1..).into_iter()
-			.scan(1, |acc, _| {
-				*acc = *acc * index_size;
-				Some(*acc)
-			})
-			.take(levels as usize - 1)
-			.collect::<Vec<usize>>());
-
-		Indexer {
-			index_size: index_size,
-			level_sizes: level_sizes,
-		}
-	}
-
-	/// unsafely get level size.
-	pub fn level_size(&self, level: u8) -> usize {
-		self.level_sizes[level as usize]
-	}
-
-	/// Converts block number and level to `BloomIndex`.
-	pub fn bloom_index(&self, block_number: usize, level: u8) -> BloomIndex {
-		BloomIndex {
-			level: level,
-			index: block_number / self.level_size(level),
-		}
-	}
-
-	/// Return bloom which are dependencies for given index.
-	/// 
-	/// Bloom indexes are ordered from lowest to highest.
-	pub fn lower_level_bloom_indexes(&self, index: &BloomIndex) -> Vec<BloomIndex> {
-		// this is the lowest level
-		if index.level == 0 {
-			return vec![];
-		}
-
-		let new_level = index.level - 1;
-		let offset = self.index_size * index.index;
-
-		(0..self.index_size).map(|i| BloomIndex::new(new_level, offset + i)).collect()
-	}
-
-	/// Return number of levels.
-	pub fn levels(&self) -> u8 {
-		self.level_sizes.len() as u8
-	}
-
-	/// Returns max indexer level.
-	pub fn max_level(&self) -> u8 {
-		self.level_sizes.len() as u8 - 1
-	}
-}
-
-#[cfg(test)]
-mod tests {
-	use chainfilter::BloomIndex;
-	use chainfilter::indexer::Indexer;
-
-	#[test]
-	fn test_level_size() {
-		let indexer = Indexer::new(16, 3);
-		assert_eq!(indexer.level_size(0), 1);
-		assert_eq!(indexer.level_size(1), 16);
-		assert_eq!(indexer.level_size(2), 256);
-	}
-
-	#[test]
-	fn test_bloom_index() {
-		let indexer = Indexer::new(16, 3);
-
-		let bi0 = indexer.bloom_index(0, 0);
-		assert_eq!(bi0.level, 0);
-		assert_eq!(bi0.index, 0);
-
-		let bi1 = indexer.bloom_index(1, 0);
-		assert_eq!(bi1.level, 0);
-		assert_eq!(bi1.index, 1);
-
-		let bi2 = indexer.bloom_index(2, 0);
-		assert_eq!(bi2.level, 0);
-		assert_eq!(bi2.index, 2);
-
-		let bi3 = indexer.bloom_index(3, 1);
-		assert_eq!(bi3.level, 1);
-		assert_eq!(bi3.index, 0);
-
-		let bi4 = indexer.bloom_index(15, 1);
-		assert_eq!(bi4.level, 1);
-		assert_eq!(bi4.index, 0);
-
-		let bi5 = indexer.bloom_index(16, 1);
-		assert_eq!(bi5.level, 1);
-		assert_eq!(bi5.index, 1);
-
-		let bi6 = indexer.bloom_index(255, 2);
-		assert_eq!(bi6.level, 2);
-		assert_eq!(bi6.index, 0);
-
-		let bi7 = indexer.bloom_index(256, 2);
-		assert_eq!(bi7.level, 2);
-		assert_eq!(bi7.index, 1);
-	}
-
-	#[test]
-	fn test_lower_level_bloom_indexes() {
-		let indexer = Indexer::new(16, 3);
-
-		let bi = indexer.bloom_index(256, 2);
-		assert_eq!(bi.level, 2);
-		assert_eq!(bi.index, 1);
-
-		let mut ebis = vec![];
-		for i in 16..32 {
-			ebis.push(BloomIndex::new(1, i));
-		}
-
-		let bis = indexer.lower_level_bloom_indexes(&bi);
-		assert_eq!(ebis, bis);
-	}
-}

ethcore/src/chainfilter/tests.rs

@@ -1,283 +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/>.
-
-use std::collections::HashMap;
-use std::io::{BufRead, BufReader, Read};
-use std::str::FromStr;
-use util::hash::*;
-use util::sha3::*;
-use chainfilter::{BloomIndex, FilterDataSource, ChainFilter};
-
-/// In memory cache for blooms.
-///
-/// Stores all blooms in HashMap, which indexes them by `BloomIndex`.
-pub struct MemoryCache {
-	blooms: HashMap<BloomIndex, H2048>,
-}
-
-impl Default for MemoryCache {
-	fn default() -> Self {
-		MemoryCache::new()
-	}
-}
-
-impl MemoryCache {
-	/// Default constructor for MemoryCache
-	pub fn new() -> Self {
-		MemoryCache { blooms: HashMap::new() }
-	}
-
-	/// inserts all blooms into cache
-	///
-	/// if bloom at given index already exists, overwrites it
-	pub fn insert_blooms(&mut self, blooms: HashMap<BloomIndex, H2048>) {
-		self.blooms.extend(blooms);
-	}
-}
-
-impl FilterDataSource for MemoryCache {
-	fn bloom_at_index(&self, index: &BloomIndex) -> Option<H2048> {
-		self.blooms.get(index).cloned()
-	}
-}
-
-fn to_bloom<T>(hashable: &T) -> H2048 where T: Hashable {
-	let mut bloom = H2048::new();
-	bloom.shift_bloomed(&hashable.sha3());
-	bloom
-}
-
-#[test]
-fn test_topic_basic_search() {
-	let index_size = 16;
-	let bloom_levels = 3;
-
-	let mut cache = MemoryCache::new();
-	let topic = H256::from_str("8d936b1bd3fc635710969ccfba471fb17d598d9d1971b538dd712e1e4b4f4dba").unwrap();
-
-	let modified_blooms = {
-		let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-		let block_number = 23;
-		filter.add_bloom(&to_bloom(&topic), block_number)
-	};
-
-	// number of modified blooms should always be equal number of levels
-	assert_eq!(modified_blooms.len(), bloom_levels as usize);
-	cache.insert_blooms(modified_blooms);
-
-	{
-		let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-		let blocks = filter.blocks_with_bloom(&to_bloom(&topic), 0, 100);
-		assert_eq!(blocks.len(), 1);
-		assert_eq!(blocks[0], 23);
-	}
-
-	{
-		let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-		let blocks = filter.blocks_with_bloom(&to_bloom(&topic), 0, 22);
-		assert_eq!(blocks.len(), 0);
-	}
-
-	{
-		let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-		let blocks = filter.blocks_with_bloom(&to_bloom(&topic), 23, 23);
-		assert_eq!(blocks.len(), 1);
-		assert_eq!(blocks[0], 23);
-	}
-
-	{
-		let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-		let blocks = filter.blocks_with_bloom(&to_bloom(&topic), 24, 100);
-		assert_eq!(blocks.len(), 0);
-	}
-}
-
-#[test]
-fn test_reset_chain_head_simple() {
-	let index_size = 16;
-	let bloom_levels = 3;
-
-	let mut cache = MemoryCache::new();
-	let topic_0 = H256::from_str("8d936b1bd3fc635710969ccfba471fb17d598d9d1971b538dd712e1e4b4f4dba").unwrap();
-	let topic_1 = H256::from_str("8d936b1bd3fc635710969ccfba471fb17d598d9d1971b538dd712e1e4b4f4dbb").unwrap();
-	let topic_2 = H256::from_str("8d936b1bd3fc635710969ccfba471fb17d598d9d1971b538dd712e1e4b4f4dbc").unwrap();
-	let topic_3 = H256::from_str("8d936b1bd3fc635710969ccfba471fb17d598d9d1971b538dd712e1e4b4f4dbd").unwrap();
-	let topic_4 = H256::from_str("8d936b1bd3fc635710969ccfba471fb17d598d9d1971b538dd712e1e4b4f4dbe").unwrap();
-	let topic_5 = H256::from_str("8d936b1bd3fc635710969ccfba471fb17d598d9d1971b538dd712e1e4b4f4dbf").unwrap();
-
-	let modified_blooms_0 = {
-		let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-		let block_number = 14;
-		filter.add_bloom(&to_bloom(&topic_0), block_number)
-	};
-
-	cache.insert_blooms(modified_blooms_0);
-
-	let modified_blooms_1 = {
-		let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-		let block_number = 15;
-		filter.add_bloom(&to_bloom(&topic_1), block_number)
-	};
-
-	cache.insert_blooms(modified_blooms_1);
-
-	let modified_blooms_2 = {
-		let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-		let block_number = 16;
-		filter.add_bloom(&to_bloom(&topic_2), block_number)
-	};
-
-	cache.insert_blooms(modified_blooms_2);
-
-	let modified_blooms_3 = {
-		let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-		let block_number = 17;
-		filter.add_bloom(&to_bloom(&topic_3), block_number)
-	};
-
-	cache.insert_blooms(modified_blooms_3);
-
-
-	let reset_modified_blooms = {
-		let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-		filter.reset_chain_head(&[to_bloom(&topic_4), to_bloom(&topic_5)], 15, 17)
-	};
-
-	cache.insert_blooms(reset_modified_blooms);
-
-	let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-	assert_eq!(filter.blocks_with_bloom(&to_bloom(&topic_0), 0, 100), vec![14]);
-	assert_eq!(filter.blocks_with_bloom(&to_bloom(&topic_1), 0, 100), vec![]);
-	assert_eq!(filter.blocks_with_bloom(&to_bloom(&topic_2), 0, 100), vec![]);
-	assert_eq!(filter.blocks_with_bloom(&to_bloom(&topic_3), 0, 100), vec![]);
-	assert_eq!(filter.blocks_with_bloom(&to_bloom(&topic_4), 0, 100), vec![15]);
-	assert_eq!(filter.blocks_with_bloom(&to_bloom(&topic_5), 0, 100), vec![16]);
-}
-
-fn for_each_bloom<F>(bytes: &[u8], mut f: F) where F: FnMut(usize, &H2048) {
-	let mut reader = BufReader::new(bytes);
-	let mut line = String::new();
-	while reader.read_line(&mut line).unwrap() > 0 {
-		{
-			let mut number_bytes = vec![];
-			let mut bloom_bytes = [0; 512];
-
-			let mut line_reader = BufReader::new(line.as_ref() as &[u8]);
-			line_reader.read_until(b' ', &mut number_bytes).unwrap();
-			line_reader.consume(2);
-			line_reader.read_exact(&mut bloom_bytes).unwrap();
-
-			let number = String::from_utf8(number_bytes).map(|s| s[..s.len() -1].to_owned()).unwrap().parse::<usize>().unwrap();
-			let bloom = H2048::from_str(&String::from_utf8(bloom_bytes.to_vec()).unwrap()).unwrap();
-			f(number, &bloom);
-		}
-		line.clear();
-	}
-}
-
-fn for_each_log<F>(bytes: &[u8], mut f: F) where F: FnMut(usize, &Address, &[H256]) {
-	let mut reader = BufReader::new(bytes);
-	let mut line = String::new();
-	while reader.read_line(&mut line).unwrap() > 0 {
-		{
-			let mut number_bytes = vec![];
-			let mut address_bytes = [0;42];
-			let mut topic = [0;66];
-			let mut topics_bytes = vec![];
-
-			let mut line_reader = BufReader::new(line.as_ref() as &[u8]);
-			line_reader.read_until(b' ', &mut number_bytes).unwrap();
-			line_reader.read_exact(&mut address_bytes).unwrap();
-			line_reader.consume(1);
-			while let Ok(_) = line_reader.read_exact(&mut topic) {
-				line_reader.consume(1);
-				topics_bytes.push(topic.to_vec());
-			}
-
-			let number = String::from_utf8(number_bytes).map(|s| s[..s.len() -1].to_owned()).unwrap().parse::<usize>().unwrap();
-			let address = Address::from_str(&String::from_utf8(address_bytes.to_vec()).map(|a| a[2..].to_owned()).unwrap()).unwrap();
-			let topics: Vec<H256> = topics_bytes
-				.into_iter()
-				.map(|t| H256::from_str(&String::from_utf8(t).map(|t| t[2..].to_owned()).unwrap()).unwrap())
-				.collect();
-			f(number, &address, &topics);
-		}
-		line.clear();
-	}
-}
-
-// tests chain filter on real data between blocks 300_000 and 400_000
-#[test]
-fn test_chainfilter_real_data_short_searches() {
-	let index_size = 16;
-	let bloom_levels = 3;
-
-	let mut cache = MemoryCache::new();
-
-	for_each_bloom(include_bytes!("blooms.txt"), | block_number, bloom | {
-		let modified_blooms = {
-			let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-			filter.add_bloom(bloom, block_number)
-		};
-
-		// number of modified blooms should always be equal number of levels
-		assert_eq!(modified_blooms.len(), bloom_levels as usize);
-		cache.insert_blooms(modified_blooms);
-	});
-
-	for_each_log(include_bytes!("logs.txt"), | block_number, address, topics | {
-		println!("block_number: {:?}", block_number);
-		let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-		let blocks = filter.blocks_with_bloom(&to_bloom(address), block_number, block_number);
-		assert_eq!(blocks.len(), 1);
-		for (i, topic) in topics.iter().enumerate() {
-			println!("topic: {:?}", i);
-			let blocks = filter.blocks_with_bloom(&to_bloom(topic), block_number, block_number);
-			assert_eq!(blocks.len(), 1);
-		}
-	});
-}
-
-// tests chain filter on real data between blocks 300_000 and 400_000
-#[test]
-fn test_chainfilter_real_data_single_search() {
-	let index_size = 16;
-	let bloom_levels = 3;
-
-	let mut cache = MemoryCache::new();
-
-	for_each_bloom(include_bytes!("blooms.txt"), | block_number, bloom | {
-		let modified_blooms = {
-			let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-			filter.add_bloom(bloom, block_number)
-		};
-
-		// number of modified blooms should always be equal number of levels
-		assert_eq!(modified_blooms.len(), bloom_levels as usize);
-		cache.insert_blooms(modified_blooms);
-	});
-
-	let address = Address::from_str("c4395759e26469baa0e6421bdc1d0232c6f4b6c3").unwrap();
-	let filter = ChainFilter::new(&cache, index_size, bloom_levels);
-	let blocks = filter.blocks_with_bloom(&to_bloom(&address), 300_000, 400_000);
-	// bloom may return more blocks, but our log density is low, so it should be fine
-	assert_eq!(blocks.len(), 3);
-	assert_eq!(blocks[0], 392697);
-	assert_eq!(blocks[1], 396348);
-	assert_eq!(blocks[2], 399804);
-}
-
-

ethcore/src/client/client.rs

@@ -16,56 +16,47 @@
 
 //! Blockchain database client.
 
-use std::marker::PhantomData;
+use std::path::PathBuf;
+use std::sync::atomic::{AtomicUsize, Ordering as AtomicOrdering};
 use util::*;
 use util::panics::*;
 use views::BlockView;
-use error::*;
-use header::{BlockNumber};
+use error::{ImportError, ExecutionError, BlockError, ImportResult};
+use header::{BlockNumber, Header};
 use state::State;
 use spec::Spec;
+use basic_types::Seal;
 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};
-use extras::TransactionAddress;
+use transaction::{LocalizedTransaction, SignedTransaction, Action};
+use blockchain::extras::TransactionAddress;
 use filter::Filter;
 use log_entry::LocalizedLogEntry;
 use block_queue::{BlockQueue, BlockQueueInfo};
 use blockchain::{BlockChain, BlockProvider, TreeRoute, ImportRoute};
-use client::{BlockId, TransactionId, ClientConfig, BlockChainClient};
+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};
+use receipt::LocalizedReceipt;
 pub use blockchain::CacheSize as BlockChainCacheSize;
+use trace::{TraceDB, ImportRequest as TraceImportRequest, LocalizedTrace, Database as TraceDatabase};
+use trace;
+use trace::FlatTransactionTraces;
 
-/// General block status
-#[derive(Debug, Eq, PartialEq)]
-pub enum BlockStatus {
-	/// Part of the blockchain.
-	InChain,
-	/// Queued for import.
-	Queued,
-	/// Known as bad.
-	Bad,
-	/// Unknown.
-	Unknown,
-}
+// re-export
+pub use types::blockchain_info::BlockChainInfo;
+pub use types::block_status::BlockStatus;
+use evm::Factory as EvmFactory;
+use miner::{Miner, MinerService};
 
-/// Information about the blockchain gathered together.
-#[derive(Debug)]
-pub struct BlockChainInfo {
-	/// Blockchain difficulty.
-	pub total_difficulty: U256,
-	/// Block queue difficulty.
-	pub pending_total_difficulty: U256,
-	/// Genesis block hash.
-	pub genesis_hash: H256,
-	/// Best blockchain block hash.
-	pub best_block_hash: H256,
-	/// Best blockchain block number.
-	pub best_block_number: BlockNumber
-}
+const MAX_TX_QUEUE_SIZE: usize = 4096;
 
 impl fmt::Display for BlockChainInfo {
 	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
@@ -97,15 +88,20 @@ 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>>,
 	state_db: Mutex<Box<JournalDB>>,
 	block_queue: BlockQueue,
 	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>,
+	queue_transactions: AtomicUsize,
 }
 
 const HISTORY: u64 = 1200;
@@ -116,49 +112,80 @@ 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, message_channel: IoChannel<NetSyncMessage> ) -> Result<Arc<Client>, Error> {
-		Client::<CanonVerifier>::new_with_verifier(config, spec, path, 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();
+	dir.push(H64::from(genesis_hash).hex());
+	//TODO: sec/fat: pruned/full versioning
+	// version here is a bit useless now, since it's controlled only be the pruning algo.
+	dir.push(format!("v{}-sec-{}", CLIENT_DB_VER_STR, pruning));
+	dir
 }
 
-impl<V> Client<V> where V: Verifier {
+/// Append a path element to the given path and return the string.
+pub fn append_path(path: &Path, item: &str) -> String {
+	let mut p = path.to_path_buf();
+	p.push(item);
+	p.to_str().unwrap().to_owned()
+}
+
+impl Client {
 	///  Create a new client with given spec and DB path and custom verifier.
-	pub fn new_with_verifier(config: ClientConfig, spec: Spec, path: &Path, message_channel: IoChannel<NetSyncMessage> ) -> Result<Arc<Client<V>>, Error> {
-		let mut dir = path.to_path_buf();
-		dir.push(H64::from(spec.genesis_header().hash()).hex());
-		//TODO: sec/fat: pruned/full versioning
-		// version here is a bit useless now, since it's controlled only be the pruning algo.
-		dir.push(format!("v{}-sec-{}", CLIENT_DB_VER_STR, config.pruning));
-		let path = dir.as_path();
+	pub fn new(
+		config: ClientConfig,
+		spec: Spec,
+		path: &Path,
+		miner: Arc<Miner>,
+		message_channel: IoChannel<NetSyncMessage>)
+		-> 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 mut state_path = path.to_path_buf();
-		state_path.push("state");
+		let chain = Arc::new(BlockChain::new(config.blockchain, &gb, &path));
+		let tracedb = Arc::new(try!(TraceDB::new(config.tracing, &path, chain.clone())));
 
-		let engine = Arc::new(try!(spec.to_engine()));
-		let state_path_str = state_path.to_str().unwrap();
-		let mut state_db = journaldb::new(state_path_str, config.pruning);
+		let mut state_db_config = match config.db_cache_size {
+			None => DatabaseConfig::default(),
+			Some(cache_size) => DatabaseConfig::with_cache(cache_size),
+		};
 
-		if state_db.is_empty() && engine.spec().ensure_db_good(state_db.as_hashdb_mut()) {
-			state_db.commit(0, &engine.spec().genesis_header().hash(), None).expect("Error commiting genesis state to state DB");
+		if config.db_compaction == DatabaseCompactionProfile::HDD {
+			state_db_config = state_db_config.compaction(CompactionProfile::hdd());
 		}
 
-		let block_queue = BlockQueue::new(config.queue, engine.clone(), message_channel);
+		let mut state_db = journaldb::new(
+			&append_path(&path, "state"),
+			config.pruning,
+			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");
+		}
+
+		let engine = Arc::new(spec.engine);
+
+		let block_queue = BlockQueue::new(config.queue, engine.clone(), message_channel.clone());
 		let panic_handler = PanicHandler::new_in_arc();
 		panic_handler.forward_from(&block_queue);
 
-		Ok(Arc::new(Client {
+		let client = Client {
 			chain: chain,
+			tracedb: tracedb,
 			engine: engine,
 			state_db: Mutex::new(state_db),
 			block_queue: block_queue,
 			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,
+			queue_transactions: AtomicUsize::new(0),
+		};
+
+		Ok(Arc::new(client))
 	}
 
 	/// Flush the block import queue.
@@ -181,7 +208,7 @@ impl<V> Client<V> where V: Verifier {
 		last_hashes
 	}
 
-	fn check_and_close_block(&self, block: &PreverifiedBlock) -> Result<ClosedBlock, ()> {
+	fn check_and_close_block(&self, block: &PreverifiedBlock) -> Result<LockedBlock, ()> {
 		let engine = self.engine.deref().deref();
 		let header = &block.header;
 
@@ -193,7 +220,7 @@ 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(());
@@ -209,25 +236,25 @@ impl<V> Client<V> where V: Verifier {
 		// Enact Verified Block
 		let parent = chain_has_parent.unwrap();
 		let last_hashes = self.build_last_hashes(header.parent_hash.clone());
-		let db = self.state_db.lock().unwrap().spawn();
+		let db = self.state_db.lock().unwrap().boxed_clone();
 
-		let enact_result = enact_verified(&block, engine, db, &parent, last_hashes);
+		let enact_result = enact_verified(&block, engine, self.tracedb.tracing_enabled(), db, &parent, last_hashes, &self.vm_factory);
 		if let Err(e) = enact_result {
 			warn!(target: "client", "Block import failed for #{} ({})\nError: {:?}", header.number(), header.hash(), e);
 			return Err(());
 		};
 
 		// Final Verification
-		let closed_block = enact_result.unwrap();
-		if let Err(e) = V::verify_block_final(&header, closed_block.block().header()) {
+		let locked_block = enact_result.unwrap();
+		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(());
 		}
 
-		Ok(closed_block)
+		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()
 		}
@@ -237,12 +264,12 @@ 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| {
-			for hash in route.enacted {
-				map.insert(hash, true);
+		let map = import_results.iter().fold(HashMap::new(), |mut map, route| {
+			for hash in &route.enacted {
+				map.insert(hash.clone(), true);
 			}
-			for hash in route.retracted {
-				map.insert(hash, false);
+			for hash in &route.retracted {
+				map.insert(hash.clone(), false);
 			}
 			map
 		});
@@ -255,17 +282,16 @@ impl<V> Client<V> where V: Verifier {
 
 	/// This is triggered by a message coming from a block queue when the block is ready for insertion
 	pub fn import_verified_blocks(&self, io: &IoChannel<NetSyncMessage>) -> usize {
-		let max_blocks_to_import = 128;
+		let max_blocks_to_import = 64;
 
 		let mut imported_blocks = Vec::with_capacity(max_blocks_to_import);
 		let mut invalid_blocks = HashSet::new();
 		let mut import_results = Vec::with_capacity(max_blocks_to_import);
 
 		let _import_lock = self.import_lock.lock();
+		let _timer = PerfTimer::new("import_verified_blocks");
 		let blocks = self.block_queue.drain(max_blocks_to_import);
 
-		let original_best = self.chain_info().best_block_hash;
-
 		for block in blocks {
 			let header = &block.header;
 
@@ -276,28 +302,12 @@ 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 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();
-			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);
+			let route = self.commit_block(closed_block, &header.hash(), &block.bytes);
 			import_results.push(route);
 
 			self.report.write().unwrap().accrue_block(&block);
@@ -318,28 +328,106 @@ 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);
+				}
+
 				io.send(NetworkIoMessage::User(SyncMessage::NewChainBlocks {
 					imported: imported_blocks,
 					invalid: invalid_blocks,
 					enacted: enacted,
 					retracted: retracted,
-				})).unwrap();
-			}
-		}
-
-		{
-			if self.chain_info().best_block_hash != original_best {
-				io.send(NetworkIoMessage::User(SyncMessage::NewChainHead)).unwrap();
+					sealed: Vec::new(),
+				})).unwrap_or_else(|e| warn!("Error sending IO notification: {:?}", e));
 			}
 		}
 
 		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().to_owned();
+		let traces = block.traces().clone().unwrap_or_else(Vec::new);
+		let traces: Vec<FlatTransactionTraces> = traces.into_iter()
+			.map(Into::into)
+			.collect();
+
+		//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.into(),
+			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");
+		self.queue_transactions.fetch_sub(transactions.len(), AtomicOrdering::SeqCst);
+		let txs = transactions.iter().filter_map(|bytes| UntrustedRlp::new(&bytes).as_val().ok()).collect();
+		let results = self.miner.import_external_transactions(self, txs);
+		results.len()
+	}
+
+	/// Attempt to get a copy of a specific block's state.
+	///
+	/// This will not fail if given BlockID::Latest.
+	/// Otherwise, this can fail (but may not) if the DB prunes state.
+	pub fn state_at(&self, id: BlockID) -> Option<State> {
+		// fast path for latest state.
+		match id.clone() {
+			BlockID::Pending => return self.miner.pending_state().or_else(|| Some(self.state())),
+			BlockID::Latest => return Some(self.state()),
+			_ => {},
+		}
+
+		let block_number = match self.block_number(id.clone()) {
+			Some(num) => num,
+			None => return None,
+		};
+
+		self.block_header(id).and_then(|header| {
+			let db = self.state_db.lock().unwrap().boxed_clone();
+
+			// early exit for pruned blocks
+			if db.is_pruned() && self.chain.best_block_number() >= block_number + HISTORY {
+				return None;
+			}
+
+			let root = HeaderView::new(&header).state_root();
+
+			State::from_existing(db, root, self.engine.account_start_nonce()).ok()
+		})
+	}
+
 	/// Get a copy of the best block's state.
 	pub fn state(&self) -> State {
-		State::from_existing(self.state_db.lock().unwrap().spawn(), HeaderView::new(&self.best_block_header()).state_root(), self.engine.account_start_nonce())
+		State::from_existing(self.state_db.lock().unwrap().boxed_clone(), HeaderView::new(&self.best_block_header()).state_root(), self.engine.account_start_nonce())
+			.expect("State root of best block header always valid.")
 	}
 
 	/// Get info on the cache.
@@ -365,80 +453,80 @@ impl<V> Client<V> where V: Verifier {
 		self.chain.configure_cache(pref_cache_size, max_cache_size);
 	}
 
-	fn block_hash(chain: &BlockChain, id: BlockId) -> Option<H256> {
+	/// Look up the block number for the given block ID.
+	pub fn block_number(&self, id: BlockID) -> Option<BlockNumber> {
 		match id {
-			BlockId::Hash(hash) => Some(hash),
-			BlockId::Number(number) => chain.block_hash(number),
-			BlockId::Earliest => chain.block_hash(0),
-			BlockId::Latest => Some(chain.best_block_hash())
+			BlockID::Number(number) => Some(number),
+			BlockID::Hash(ref hash) => self.chain.block_number(hash),
+			BlockID::Earliest => Some(0),
+			BlockID::Latest | BlockID::Pending => Some(self.chain.best_block_number()),
 		}
 	}
 
-	fn block_number(&self, id: BlockId) -> Option<BlockNumber> {
+	fn block_hash(chain: &BlockChain, id: BlockID) -> Option<H256> {
 		match id {
-			BlockId::Number(number) => Some(number),
-			BlockId::Hash(ref hash) => self.chain.block_number(hash),
-			BlockId::Earliest => Some(0),
-			BlockId::Latest => Some(self.chain.best_block_number())
+			BlockID::Hash(hash) => Some(hash),
+			BlockID::Number(number) => chain.block_hash(number),
+			BlockID::Earliest => chain.block_hash(0),
+			BlockID::Latest | BlockID::Pending => Some(chain.best_block_hash()),
+		}
+	}
+
+	fn transaction_address(&self, id: TransactionID) -> Option<TransactionAddress> {
+		match id {
+			TransactionID::Hash(ref hash) => self.chain.transaction_address(hash),
+			TransactionID::Location(id, index) => Self::block_hash(&self.chain, id).map(|hash| TransactionAddress {
+				block_hash: hash,
+				index: index,
+			})
 		}
 	}
 }
 
-impl<V> BlockChainClient for Client<V> where V: Verifier {
-	// TODO [todr] Should be moved to miner crate eventually.
-	fn try_seal(&self, block: ClosedBlock, seal: Vec<Bytes>) -> Result<SealedBlock, ClosedBlock> {
-		block.try_seal(self.engine.deref().deref(), seal)
-	}
+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);
+		let last_hashes = self.build_last_hashes(view.hash());
+		let env_info = EnvInfo {
+			number: view.number(),
+			author: view.author(),
+			timestamp: view.timestamp(),
+			difficulty: view.difficulty(),
+			last_hashes: last_hashes,
+			gas_used: U256::zero(),
+			gas_limit: U256::max_value(),
+		};
+		// that's just a copy of the state.
+		let mut state = self.state();
+		let sender = try!(t.sender().map_err(|e| {
+			let message = format!("Transaction malformed: {:?}", e);
+			ExecutionError::TransactionMalformed(message)
+		}));
+		let balance = state.balance(&sender);
+		let needed_balance = t.value + t.gas * t.gas_price;
+		if balance < needed_balance {
+			// give the sender a sufficient balance
+			state.add_balance(&sender, &(needed_balance - balance));
+		}
+		let options = TransactOptions { tracing: analytics.transaction_tracing, vm_tracing: analytics.vm_tracing, check_nonce: false };
+		let mut ret = Executive::new(&mut state, &env_info, self.engine.deref().deref(), &self.vm_factory).transact(t, options);
 
-	// TODO [todr] Should be moved to miner crate eventually.
-	fn prepare_sealing(&self, author: Address, gas_floor_target: U256, extra_data: Bytes, transactions: Vec<SignedTransaction>) -> Option<ClosedBlock> {
-		let engine = self.engine.deref().deref();
-		let h = self.chain.best_block_hash();
-
-		let mut b = OpenBlock::new(
-			engine,
-			self.state_db.lock().unwrap().spawn(),
-			match self.chain.block_header(&h) { Some(ref x) => x, None => {return None} },
-			self.build_last_hashes(h.clone()),
-			author,
-			gas_floor_target,
-			extra_data,
-		);
-
-		// Add uncles
-		self.chain
-			.find_uncle_headers(&h, engine.maximum_uncle_age())
-			.unwrap()
-			.into_iter()
-			.take(engine.maximum_uncle_count())
-			.foreach(|h| {
-				b.push_uncle(h).unwrap();
-			});
-
-		// Add transactions
-		let block_number = b.block().header().number();
-		for tx in transactions {
-			let import = b.push_transaction(tx, None);
-			if let Err(e) = import {
-				trace!("Error adding transaction to block: number={}. Error: {:?}", block_number, e);
+		// TODO gav move this into Executive.
+		if analytics.state_diffing {
+			if let Ok(ref mut x) = ret {
+				x.state_diff = Some(state.diff_from(self.state()));
 			}
 		}
-
-		// And close
-		let b = b.close();
-		trace!("Sealing: number={}, hash={}, diff={}",
-			   b.block().header().number(),
-			   b.hash(),
-			   b.block().header().difficulty()
-		);
-		Some(b)
+		ret
 	}
 
-	fn block_header(&self, id: BlockId) -> Option<Bytes> {
+
+	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()))
 	}
 
-	fn block_body(&self, id: BlockId) -> Option<Bytes> {
+	fn block_body(&self, id: BlockID) -> Option<Bytes> {
 		Self::block_hash(&self.chain, id).and_then(|hash| {
 			self.chain.block(&hash).map(|bytes| {
 				let rlp = Rlp::new(&bytes);
@@ -450,13 +538,18 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 		})
 	}
 
-	fn block(&self, id: BlockId) -> Option<Bytes> {
+	fn block(&self, id: BlockID) -> Option<Bytes> {
+		if let &BlockID::Pending = &id {
+			if let Some(block) = self.miner.pending_block() { 
+				return Some(block.rlp_bytes(Seal::Without));
+			}
+		}
 		Self::block_hash(&self.chain, id).and_then(|hash| {
 			self.chain.block(&hash)
 		})
 	}
 
-	fn block_status(&self, id: BlockId) -> BlockStatus {
+	fn block_status(&self, id: BlockID) -> BlockStatus {
 		match Self::block_hash(&self.chain, id) {
 			Some(ref hash) if self.chain.is_known(hash) => BlockStatus::InChain,
 			Some(hash) => self.block_queue.block_status(&hash),
@@ -464,15 +557,20 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 		}
 	}
 
-	fn block_total_difficulty(&self, id: BlockId) -> Option<U256> {
+	fn block_total_difficulty(&self, id: BlockID) -> Option<U256> {
+		if let &BlockID::Pending = &id {
+			if let Some(block) = self.miner.pending_block() {
+				return Some(*block.header.difficulty() + self.block_total_difficulty(BlockID::Latest).expect("blocks in chain have details; qed"));
+			} 
+		}
 		Self::block_hash(&self.chain, id).and_then(|hash| self.chain.block_details(&hash)).map(|d| d.total_difficulty)
 	}
 
-	fn nonce(&self, address: &Address) -> U256 {
-		self.state().nonce(address)
+	fn nonce(&self, address: &Address, id: BlockID) -> Option<U256> {
+		self.state_at(id).map(|s| s.nonce(address))
 	}
 
-	fn block_hash(&self, id: BlockId) -> Option<H256> {
+	fn block_hash(&self, id: BlockID) -> Option<H256> {
 		Self::block_hash(&self.chain, id)
 	}
 
@@ -480,22 +578,66 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 		self.state().code(address)
 	}
 
-	fn balance(&self, address: &Address) -> U256 {
-		self.state().balance(address)
+	fn balance(&self, address: &Address, id: BlockID) -> Option<U256> {
+		self.state_at(id).map(|s| s.balance(address))
 	}
 
-	fn storage_at(&self, address: &Address, position: &H256) -> H256 {
-		self.state().storage_at(address, position)
+	fn storage_at(&self, address: &Address, position: &H256, id: BlockID) -> Option<H256> {
+		self.state_at(id).map(|s| s.storage_at(address, position))
 	}
 
-	fn transaction(&self, id: TransactionId) -> Option<LocalizedTransaction> {
-		match id {
-			TransactionId::Hash(ref hash) => self.chain.transaction_address(hash),
-			TransactionId::Location(id, index) => Self::block_hash(&self.chain, id).map(|hash| TransactionAddress {
-				block_hash: hash,
-				index: index
-			})
-		}.and_then(|address| self.chain.transaction(&address))
+	fn transaction(&self, id: TransactionID) -> Option<LocalizedTransaction> {
+		self.transaction_address(id).and_then(|address| self.chain.transaction(&address))
+	}
+
+	fn uncle(&self, id: UncleID) -> Option<Header> {
+		let index = id.1;
+		self.block(id.0).and_then(|block| BlockView::new(&block).uncle_at(index))
+	}
+
+	fn transaction_receipt(&self, id: TransactionID) -> Option<LocalizedReceipt> {
+		self.transaction_address(id).and_then(|address| {
+			let t = self.chain.block(&address.block_hash)
+				.and_then(|block| BlockView::new(&block).localized_transaction_at(address.index));
+
+			match (t, self.chain.transaction_receipt(&address)) {
+				(Some(tx), Some(receipt)) => {
+					let block_hash = tx.block_hash.clone();
+					let block_number = tx.block_number.clone();
+					let transaction_hash = tx.hash();
+					let transaction_index = tx.transaction_index;
+					let prior_gas_used = match tx.transaction_index {
+						0 => U256::zero(),
+						i => {
+							let prior_address = TransactionAddress { block_hash: address.block_hash, index: i - 1 };
+							let prior_receipt = self.chain.transaction_receipt(&prior_address).expect("Transaction receipt at `address` exists; `prior_address` has lower index in same block; qed");
+							prior_receipt.gas_used
+						}
+					};
+					Some(LocalizedReceipt {
+						transaction_hash: tx.hash(),
+						transaction_index: tx.transaction_index,
+						block_hash: tx.block_hash,
+						block_number: tx.block_number,
+						cumulative_gas_used: receipt.gas_used,
+						gas_used: receipt.gas_used - prior_gas_used,
+						contract_address: match tx.action {
+							Action::Call(_) => None,
+							Action::Create => Some(contract_address(&tx.sender().unwrap(), &tx.nonce))
+						},
+						logs: receipt.logs.into_iter().enumerate().map(|(i, log)| LocalizedLogEntry {
+							entry: log,
+							block_hash: block_hash.clone(),
+							block_number: block_number,
+							transaction_hash: transaction_hash.clone(),
+							transaction_index: transaction_index,
+							log_index: i
+						}).collect()
+					})
+				},
+				_ => None
+			}
+		})
 	}
 
 	fn tree_route(&self, from: &H256, to: &H256) -> Option<TreeRoute> {
@@ -505,6 +647,10 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 		}
 	}
 
+	fn find_uncles(&self, hash: &H256) -> Option<Vec<H256>> {
+		self.chain.find_uncle_hashes(hash, self.engine.maximum_uncle_age())
+	}
+
 	fn state_data(&self, hash: &H256) -> Option<Bytes> {
 		self.state_db.lock().unwrap().state(hash)
 	}
@@ -517,10 +663,10 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 		{
 			let header = BlockView::new(&bytes).header_view();
 			if self.chain.is_known(&header.sha3()) {
-				return Err(x!(ImportError::AlreadyInChain));
+				return Err(ImportError::AlreadyInChain.into());
 			}
-			if self.block_status(BlockId::Hash(header.parent_hash())) == BlockStatus::Unknown {
-				return Err(x!(BlockError::UnknownParent(header.parent_hash())));
+			if self.block_status(BlockID::Hash(header.parent_hash())) == BlockStatus::Unknown {
+				return Err(BlockError::UnknownParent(header.parent_hash()).into());
 			}
 		}
 		self.block_queue.import_block(bytes)
@@ -544,7 +690,7 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 		}
 	}
 
-	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockId, to_block: BlockId) -> Option<Vec<BlockNumber>> {
+	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockID, to_block: BlockID) -> Option<Vec<BlockNumber>> {
 		match (self.block_number(from_block), self.block_number(to_block)) {
 			(Some(from), Some(to)) => Some(self.chain.blocks_with_bloom(bloom, from, to)),
 			_ => None
@@ -580,7 +726,7 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 						 	.map(|(i, log)| LocalizedLogEntry {
 							 	entry: log,
 								block_hash: hash.clone(),
-								block_number: number as usize,
+								block_number: number,
 								transaction_hash: hashes.get(index).cloned().unwrap_or_else(H256::new),
 								transaction_index: index,
 								log_index: log_index + i
@@ -592,6 +738,132 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 			})
 			.collect()
 	}
+
+	fn filter_traces(&self, filter: TraceFilter) -> Option<Vec<LocalizedTrace>> {
+		let start = self.block_number(filter.range.start);
+		let end = self.block_number(filter.range.end);
+
+		if start.is_some() && end.is_some() {
+			let filter = trace::Filter {
+				range: start.unwrap() as usize..end.unwrap() as usize,
+				from_address: From::from(filter.from_address),
+				to_address: From::from(filter.to_address),
+			};
+
+			let traces = self.tracedb.filter(&filter);
+			Some(traces)
+		} else {
+			None
+		}
+	}
+
+	fn trace(&self, trace: TraceId) -> Option<LocalizedTrace> {
+		let trace_address = trace.address;
+		self.transaction_address(trace.transaction)
+			.and_then(|tx_address| {
+				self.block_number(BlockID::Hash(tx_address.block_hash))
+					.and_then(|number| self.tracedb.trace(number, tx_address.index, trace_address))
+			})
+	}
+
+	fn transaction_traces(&self, transaction: TransactionID) -> Option<Vec<LocalizedTrace>> {
+		self.transaction_address(transaction)
+			.and_then(|tx_address| {
+				self.block_number(BlockID::Hash(tx_address.block_hash))
+					.and_then(|number| self.tracedb.transaction_traces(number, tx_address.index))
+			})
+	}
+
+	fn block_traces(&self, block: BlockID) -> Option<Vec<LocalizedTrace>> {
+		self.block_number(block)
+			.and_then(|number| self.tracedb.block_traces(number))
+	}
+
+	fn last_hashes(&self) -> LastHashes {
+		self.build_last_hashes(self.chain.best_block_hash())
+	}
+
+	fn queue_transactions(&self, transactions: Vec<Bytes>) {
+		if self.queue_transactions.load(AtomicOrdering::Relaxed) > MAX_TX_QUEUE_SIZE {
+			debug!("Ignoring {} transactions: queue is full", transactions.len());
+		} else {
+			let len = transactions.len();
+			match self.io_channel.send(NetworkIoMessage::User(SyncMessage::NewTransactions(transactions))) {
+				Ok(_) => {
+					self.queue_transactions.fetch_add(len, AtomicOrdering::SeqCst);
+				}
+				Err(e) => {
+					debug!("Ignoring {} transactions: error queueing: {}", len, e);
+				}
+			}
+		}
+	}
+
+	fn pending_transactions(&self) -> Vec<SignedTransaction> {
+		self.miner.pending_transactions()
+	}
+}
+
+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();
+
+		let mut open_block = OpenBlock::new(
+			engine,
+			&self.vm_factory,
+			false,	// TODO: this will need to be parameterised once we want to do immediate mining insertion.
+			self.state_db.lock().unwrap().boxed_clone(),
+			&self.chain.block_header(&h).expect("h is best block hash: so it's header must exist: qed"),
+			self.build_last_hashes(h.clone()),
+			author,
+			gas_range_target,
+			extra_data,
+		).expect("OpenBlock::new only fails if parent state root invalid; state root of best block's header is never invalid; qed");
+
+		// Add uncles
+		self.chain
+			.find_uncle_headers(&h, engine.maximum_uncle_age())
+			.unwrap()
+			.into_iter()
+			.take(engine.maximum_uncle_count())
+			.foreach(|h| {
+				open_block.push_uncle(h).unwrap();
+			});
+
+		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 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));
+		}
+
+		Ok(h)
+	}
 }
 
 impl MayPanic for Client {

ethcore/src/client/config.rs

@@ -15,9 +15,25 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 pub use block_queue::BlockQueueConfig;
-pub use blockchain::BlockChainConfig;
+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 {
@@ -25,8 +41,18 @@ pub struct ClientConfig {
 	pub queue: BlockQueueConfig,
 	/// Blockchain configuration.
 	pub blockchain: BlockChainConfig,
+	/// Trace configuration.
+	pub tracing: TraceConfig,
+	/// VM type.
+	pub vm_type: VMType,
 	/// The JournalDB ("pruning") algorithm to use.
 	pub pruning: journaldb::Algorithm,
 	/// The name of the client instance.
 	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/error.rs

@@ -0,0 +1,23 @@
+use trace::Error as TraceError;
+use std::fmt::{Display, Formatter, Error as FmtError};
+
+/// Client configuration errors.
+#[derive(Debug)]
+pub enum Error {
+	/// TraceDB configuration error.
+	Trace(TraceError),
+}
+
+impl From<TraceError> for Error {
+	fn from(err: TraceError) -> Self {
+		Error::Trace(err)
+	}
+}
+
+impl Display for Error {
+	fn fmt(&self, f: &mut Formatter) -> Result<(), FmtError> {
+		match *self {
+			Error::Trace(ref err) => write!(f, "{}", err)
+		}
+	}
+}

ethcore/src/client/mod.rs

@@ -18,66 +18,124 @@
 
 mod client;
 mod config;
-mod ids;
+mod error;
 mod test_client;
+mod trace;
 
 pub use self::client::*;
-pub use self::config::{ClientConfig, BlockQueueConfig, BlockChainConfig};
-pub use self::ids::{BlockId, TransactionId};
+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};
+pub use self::trace::Filter as TraceFilter;
+pub use executive::{Executed, Executive, TransactOptions};
+pub use env_info::{LastHashes, EnvInfo};
 
 use util::bytes::Bytes;
 use util::hash::{Address, H256, H2048};
 use util::numbers::U256;
+use util::Itertools;
 use blockchain::TreeRoute;
 use block_queue::BlockQueueInfo;
-use block::{ClosedBlock, SealedBlock};
-use header::BlockNumber;
+use block::{OpenBlock, SealedBlock};
+use header::{BlockNumber, Header};
 use transaction::{LocalizedTransaction, SignedTransaction};
 use log_entry::LocalizedLogEntry;
 use filter::Filter;
-use error::{ImportResult};
+use views::{BlockView};
+use error::{ImportResult, ExecutionError};
+use receipt::LocalizedReceipt;
+use trace::LocalizedTrace;
+use evm::Factory as EvmFactory;
+
+/// Options concerning what analytics we run on the call.
+#[derive(Eq, PartialEq, Default, Clone, Copy, Debug)]
+pub struct CallAnalytics {
+	/// Make a transaction trace.
+	pub transaction_tracing: bool,
+	/// Make a VM trace.
+	pub vm_tracing: bool,
+	/// Make a diff.
+	pub state_diffing: bool,
+}
 
 /// Blockchain database client. Owns and manages a blockchain and a block queue.
 pub trait BlockChainClient : Sync + Send {
 	/// Get raw block header data by block id.
-	fn block_header(&self, id: BlockId) -> Option<Bytes>;
+	fn block_header(&self, id: BlockID) -> Option<Bytes>;
 
 	/// Get raw block body data by block id.
 	/// Block body is an RLP list of two items: uncles and transactions.
-	fn block_body(&self, id: BlockId) -> Option<Bytes>;
+	fn block_body(&self, id: BlockID) -> Option<Bytes>;
 
 	/// Get raw block data by block header hash.
-	fn block(&self, id: BlockId) -> Option<Bytes>;
+	fn block(&self, id: BlockID) -> Option<Bytes>;
 
 	/// Get block status by block header hash.
-	fn block_status(&self, id: BlockId) -> BlockStatus;
+	fn block_status(&self, id: BlockID) -> BlockStatus;
 
 	/// Get block total difficulty.
-	fn block_total_difficulty(&self, id: BlockId) -> Option<U256>;
+	fn block_total_difficulty(&self, id: BlockID) -> Option<U256>;
 
-	/// Get address nonce.
-	fn nonce(&self, address: &Address) -> U256;
+	/// Attempt to get address nonce at given block.
+	/// May not fail on BlockID::Latest.
+	fn nonce(&self, address: &Address, id: BlockID) -> Option<U256>;
+
+	/// Get address nonce at the latest block's state.
+	fn latest_nonce(&self, address: &Address) -> U256 {
+		self.nonce(address, BlockID::Latest)
+			.expect("nonce will return Some when given BlockID::Latest. nonce was given BlockID::Latest. \
+			Therefore nonce has returned Some; qed")
+	}
 
 	/// Get block hash.
-	fn block_hash(&self, id: BlockId) -> Option<H256>;
+	fn block_hash(&self, id: BlockID) -> Option<H256>;
 
 	/// Get address code.
 	fn code(&self, address: &Address) -> Option<Bytes>;
 
-	/// Get address balance.
-	fn balance(&self, address: &Address) -> U256;
+	/// Get address balance at the given block's state.
+	///
+	/// May not return None if given BlockID::Latest.
+	/// Returns None if and only if the block's root hash has been pruned from the DB.
+	fn balance(&self, address: &Address, id: BlockID) -> Option<U256>;
 
-	/// Get value of the storage at given position.
-	fn storage_at(&self, address: &Address, position: &H256) -> H256;
+	/// Get address balance at the latest block's state.
+	fn latest_balance(&self, address: &Address) -> U256 {
+		self.balance(address, BlockID::Latest)
+			.expect("balance will return Some if given BlockID::Latest. balance was given BlockID::Latest \
+			Therefore balance has returned Some; qed")
+	}
+
+	/// Get value of the storage at given position at the given block's state.
+	///
+	/// May not return None if given BlockID::Latest.
+	/// Returns None if and only if the block's root hash has been pruned from the DB.
+	fn storage_at(&self, address: &Address, position: &H256, id: BlockID) -> Option<H256>;
+
+	/// Get value of the storage at given position at the latest block's state.
+	fn latest_storage_at(&self, address: &Address, position: &H256) -> H256 {
+		self.storage_at(address, position, BlockID::Latest)
+			.expect("storage_at will return Some if given BlockID::Latest. storage_at was given BlockID::Latest. \
+			Therefore storage_at has returned Some; qed")
+	}
 
 	/// Get transaction with given hash.
-	fn transaction(&self, id: TransactionId) -> Option<LocalizedTransaction>;
+	fn transaction(&self, id: TransactionID) -> Option<LocalizedTransaction>;
+
+	/// Get uncle with given id.
+	fn uncle(&self, id: UncleID) -> Option<Header>;
+
+	/// Get transaction receipt with given hash.
+	fn transaction_receipt(&self, id: TransactionID) -> Option<LocalizedReceipt>;
 
 	/// Get a tree route between `from` and `to`.
 	/// See `BlockChain::tree_route`.
 	fn tree_route(&self, from: &H256, to: &H256) -> Option<TreeRoute>;
 
+	/// Get all possible uncle hashes for a block.
+	fn find_uncles(&self, hash: &H256) -> Option<Vec<H256>>;
+
 	/// Get latest state node
 	fn state_data(&self, hash: &H256) -> Option<Bytes>;
 
@@ -99,22 +157,76 @@ pub trait BlockChainClient : Sync + Send {
 	/// Get the best block header.
 	fn best_block_header(&self) -> Bytes {
 		// TODO: lock blockchain only once
-		self.block_header(BlockId::Hash(self.chain_info().best_block_hash)).unwrap()
+		self.block_header(BlockID::Hash(self.chain_info().best_block_hash)).unwrap()
 	}
 
 	/// Returns numbers of blocks containing given bloom.
-	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockId, to_block: BlockId) -> Option<Vec<BlockNumber>>;
+	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockID, to_block: BlockID) -> Option<Vec<BlockNumber>>;
 
 	/// Returns logs matching given filter.
 	fn logs(&self, filter: Filter) -> Vec<LocalizedLogEntry>;
 
-	// TODO [todr] Should be moved to miner crate eventually.
-	/// Returns ClosedBlock prepared for sealing.
-	fn prepare_sealing(&self, author: Address, gas_floor_target: U256, extra_data: Bytes, transactions: Vec<SignedTransaction>) -> Option<ClosedBlock>;
+	/// Makes a non-persistent transaction call.
+	// TODO: should be able to accept blockchain location for call.
+	fn call(&self, t: &SignedTransaction, analytics: CallAnalytics) -> Result<Executed, ExecutionError>;
 
-	// TODO [todr] Should be moved to miner crate eventually.
-	/// Attempts to seal given block. Returns `SealedBlock` on success and the same block in case of error.
-	fn try_seal(&self, block: ClosedBlock, seal: Vec<Bytes>) -> Result<SealedBlock, ClosedBlock>;
+	/// Returns traces matching given filter.
+	fn filter_traces(&self, filter: TraceFilter) -> Option<Vec<LocalizedTrace>>;
 
+	/// Returns trace with given id.
+	fn trace(&self, trace: TraceId) -> Option<LocalizedTrace>;
+
+	/// Returns traces created by transaction.
+	fn transaction_traces(&self, trace: TransactionID) -> Option<Vec<LocalizedTrace>>;
+
+	/// Returns traces created by transaction from block.
+	fn block_traces(&self, trace: BlockID) -> Option<Vec<LocalizedTrace>>;
+
+	/// Get last hashes starting from best block.
+	fn last_hashes(&self) -> LastHashes;
+
+	/// Queue transactions for importing.
+	fn queue_transactions(&self, transactions: Vec<Bytes>);
+
+	/// list all transactions
+	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>, ()> {
+		let mut h = self.chain_info().best_block_hash;
+		let mut corpus = Vec::new();
+		for _ in 0..sample_size {
+			let block_bytes = self.block(BlockID::Hash(h)).expect("h is either the best_block_hash or an ancestor; qed");
+			let block = BlockView::new(&block_bytes);
+			let header = block.header_view();
+			if header.number() == 0 {
+				break;
+			}
+			block.transaction_views().iter().foreach(|t| corpus.push(t.gas_price()));
+			h = header.parent_hash().clone();
+		}
+		corpus.sort();
+		let n = corpus.len();
+		if n > 0 {
+			Ok((0..(distribution_size + 1))
+				.map(|i| corpus[i * (n - 1) / distribution_size])
+				.collect::<Vec<_>>()
+			)
+		} else {
+			Err(())
+		}
+	}
 }
 
+/// Extended client interface used for mining
+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

@@ -16,19 +16,27 @@
 
 //! Test client.
 
+use std::sync::atomic::{AtomicUsize, Ordering as AtomicOrder};
 use util::*;
 use transaction::{Transaction, LocalizedTransaction, SignedTransaction, Action};
 use blockchain::TreeRoute;
-use client::{BlockChainClient, BlockChainInfo, BlockStatus, BlockId, TransactionId};
+use client::{BlockChainClient, MiningBlockChainClient, BlockChainInfo, BlockStatus, BlockID,
+	TransactionID, UncleID, TraceId, TraceFilter, LastHashes, CallAnalytics };
 use header::{Header as BlockHeader, BlockNumber};
 use filter::Filter;
 use log_entry::LocalizedLogEntry;
-use receipt::Receipt;
-use extras::BlockReceipts;
+use receipt::{Receipt, LocalizedReceipt};
+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::{SealedBlock, ClosedBlock};
+use block::{OpenBlock, SealedBlock};
+use executive::Executed;
+use error::{ExecutionError};
+use trace::LocalizedTrace;
 
 /// Test client.
 pub struct TestBlockChainClient {
@@ -44,10 +52,20 @@ pub struct TestBlockChainClient {
 	pub difficulty: RwLock<U256>,
 	/// Balances.
 	pub balances: RwLock<HashMap<Address, U256>>,
+	/// Nonces.
+	pub nonces: RwLock<HashMap<Address, U256>>,
 	/// Storage.
 	pub storage: RwLock<HashMap<(Address, H256), H256>>,
 	/// Code.
 	pub code: RwLock<HashMap<Address, Bytes>>,
+	/// Execution result.
+	pub execution_result: RwLock<Option<Executed>>,
+	/// Transaction receipts.
+	pub receipts: RwLock<HashMap<TransactionID, LocalizedReceipt>>,
+	/// Block queue size.
+	pub queue_size: AtomicUsize,
+	/// Miner
+	pub miner: Arc<Miner>,
 }
 
 #[derive(Clone)]
@@ -80,19 +98,39 @@ impl TestBlockChainClient {
 			last_hash: RwLock::new(H256::new()),
 			difficulty: RwLock::new(From::from(0)),
 			balances: RwLock::new(HashMap::new()),
+			nonces: RwLock::new(HashMap::new()),
 			storage: RwLock::new(HashMap::new()),
 			code: RwLock::new(HashMap::new()),
+			execution_result: RwLock::new(None),
+			receipts: RwLock::new(HashMap::new()),
+			queue_size: AtomicUsize::new(0),
+			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();
 		client
 	}
 
+	/// Set the transaction receipt result
+	pub fn set_transaction_receipt(&self, id: TransactionID, receipt: LocalizedReceipt) {
+		self.receipts.write().unwrap().insert(id, receipt);
+	}
+
+	/// Set the execution result.
+	pub fn set_execution_result(&self, result: Executed) {
+		*self.execution_result.write().unwrap() = Some(result);
+	}
+
 	/// Set the balance of account `address` to `balance`.
 	pub fn set_balance(&self, address: Address, balance: U256) {
 		self.balances.write().unwrap().insert(address, balance);
 	}
 
+	/// Set nonce of account `address` to `nonce`.
+	pub fn set_nonce(&self, address: Address, nonce: U256) {
+		self.nonces.write().unwrap().insert(address, nonce);
+	}
+
 	/// Set `code` at `address`.
 	pub fn set_code(&self, address: Address, code: Bytes) {
 		self.code.write().unwrap().insert(address, code);
@@ -103,6 +141,11 @@ impl TestBlockChainClient {
 		self.storage.write().unwrap().insert((address, position), value);
 	}
 
+	/// Set block queue size for testing
+	pub fn set_queue_size(&self, size: usize) {
+		self.queue_size.store(size, AtomicOrder::Relaxed);
+	}
+
 	/// Add blocks to test client.
 	pub fn add_blocks(&self, count: usize, with: EachBlockWith) {
 		let len = self.numbers.read().unwrap().len();
@@ -111,6 +154,7 @@ impl TestBlockChainClient {
 			header.difficulty = From::from(n);
 			header.parent_hash = self.last_hash.read().unwrap().clone();
 			header.number = n as BlockNumber;
+			header.gas_limit = U256::from(1_000_000);
 			let uncles = match with {
 				EachBlockWith::Uncle | EachBlockWith::UncleAndTransaction => {
 					let mut uncles = RlpStream::new_list(1);
@@ -128,6 +172,8 @@ impl TestBlockChainClient {
 				EachBlockWith::Transaction | EachBlockWith::UncleAndTransaction => {
 					let mut txs = RlpStream::new_list(1);
 					let keypair = KeyPair::create().unwrap();
+					// Update nonces value
+					self.nonces.write().unwrap().insert(keypair.address(), U256::one());
 					let tx = Transaction {
 						action: Action::Create,
 						value: U256::from(100),
@@ -140,7 +186,7 @@ impl TestBlockChainClient {
 					txs.append(&signed_tx);
 					txs.out()
 				},
-				_ => rlp::NULL_RLP.to_vec()
+				_ => rlp::EMPTY_LIST_RLP.to_vec()
 			};
 
 			let mut rlp = RlpStream::new_list(3);
@@ -151,11 +197,23 @@ impl TestBlockChainClient {
 		}
 	}
 
-	/// TODO:
+	/// Make a bad block by setting invalid extra data.
 	pub fn corrupt_block(&mut self, n: BlockNumber) {
-		let hash = self.block_hash(BlockId::Number(n)).unwrap();
-		let mut header: BlockHeader = decode(&self.block_header(BlockId::Number(n)).unwrap());
-		header.parent_hash = H256::new();
+		let hash = self.block_hash(BlockID::Number(n)).unwrap();
+		let mut header: BlockHeader = decode(&self.block_header(BlockID::Number(n)).unwrap());
+		header.extra_data = b"This extra data is way too long to be considered valid".to_vec();
+		let mut rlp = RlpStream::new_list(3);
+		rlp.append(&header);
+		rlp.append_raw(&rlp::NULL_RLP, 1);
+		rlp.append_raw(&rlp::NULL_RLP, 1);
+		self.blocks.write().unwrap().insert(hash, rlp.out());
+	}
+
+	/// Make a bad block by setting invalid parent hash.
+	pub fn corrupt_block_parent(&mut self, n: BlockNumber) {
+		let hash = self.block_hash(BlockID::Number(n)).unwrap();
+		let mut header: BlockHeader = decode(&self.block_header(BlockID::Number(n)).unwrap());
+		header.parent_hash = H256::from(42);
 		let mut rlp = RlpStream::new_list(3);
 		rlp.append(&header);
 		rlp.append_raw(&rlp::NULL_RLP, 1);
@@ -170,46 +228,91 @@ impl TestBlockChainClient {
 		blocks_read[&index].clone()
 	}
 
-	fn block_hash(&self, id: BlockId) -> Option<H256> {
+	fn block_hash(&self, id: BlockID) -> Option<H256> {
 		match id {
-			BlockId::Hash(hash) => Some(hash),
-			BlockId::Number(n) => self.numbers.read().unwrap().get(&(n as usize)).cloned(),
-			BlockId::Earliest => self.numbers.read().unwrap().get(&0).cloned(),
-			BlockId::Latest => self.numbers.read().unwrap().get(&(self.numbers.read().unwrap().len() - 1)).cloned()
+			BlockID::Hash(hash) => Some(hash),
+			BlockID::Number(n) => self.numbers.read().unwrap().get(&(n as usize)).cloned(),
+			BlockID::Earliest => self.numbers.read().unwrap().get(&0).cloned(),
+			BlockID::Latest | BlockID::Pending => self.numbers.read().unwrap().get(&(self.numbers.read().unwrap().len() - 1)).cloned()
 		}
 	}
 }
 
-impl BlockChainClient for TestBlockChainClient {
-	fn block_total_difficulty(&self, _id: BlockId) -> Option<U256> {
-		Some(U256::zero())
+impl MiningBlockChainClient for TestBlockChainClient {
+	fn prepare_open_block(&self, _author: Address, _gas_range_target: (U256, U256), _extra_data: Bytes) -> OpenBlock {
+		unimplemented!();
 	}
-
-	fn block_hash(&self, _id: BlockId) -> Option<H256> {
+	
+	fn vm_factory(&self) -> &EvmFactory {
 		unimplemented!();
 	}
 
-	fn nonce(&self, _address: &Address) -> U256 {
-		U256::zero()
+	fn import_sealed_block(&self, _block: SealedBlock) -> ImportResult {
+		unimplemented!();
+	}
+}
+
+impl BlockChainClient for TestBlockChainClient {
+	fn call(&self, _t: &SignedTransaction, _analytics: CallAnalytics) -> Result<Executed, ExecutionError> {
+		Ok(self.execution_result.read().unwrap().clone().unwrap())
+	}
+
+	fn block_total_difficulty(&self, _id: BlockID) -> Option<U256> {
+		Some(U256::zero())
+	}
+
+	fn block_hash(&self, id: BlockID) -> Option<H256> {
+		Self::block_hash(self, id)
+	}
+
+	fn nonce(&self, address: &Address, id: BlockID) -> Option<U256> {
+		match id {
+			BlockID::Latest => Some(self.nonces.read().unwrap().get(address).cloned().unwrap_or_else(U256::zero)),
+			_ => None,
+		}
+	}
+
+	fn latest_nonce(&self, address: &Address) -> U256 {
+		self.nonce(address, BlockID::Latest).unwrap()
 	}
 
 	fn code(&self, address: &Address) -> Option<Bytes> {
 		self.code.read().unwrap().get(address).cloned()
 	}
 
-	fn balance(&self, address: &Address) -> U256 {
-		self.balances.read().unwrap().get(address).cloned().unwrap_or_else(U256::zero)
+	fn balance(&self, address: &Address, id: BlockID) -> Option<U256> {
+		if let BlockID::Latest = id {
+			Some(self.balances.read().unwrap().get(address).cloned().unwrap_or_else(U256::zero))
+		} else {
+			None
+		}
 	}
 
-	fn storage_at(&self, address: &Address, position: &H256) -> H256 {
-		self.storage.read().unwrap().get(&(address.clone(), position.clone())).cloned().unwrap_or_else(H256::new)
+	fn latest_balance(&self, address: &Address) -> U256 {
+		self.balance(address, BlockID::Latest).unwrap()
 	}
 
-	fn transaction(&self, _id: TransactionId) -> Option<LocalizedTransaction> {
+	fn storage_at(&self, address: &Address, position: &H256, id: BlockID) -> Option<H256> {
+		if let BlockID::Latest = id {
+			Some(self.storage.read().unwrap().get(&(address.clone(), position.clone())).cloned().unwrap_or_else(H256::new))
+		} else {
+			None
+		}
+	}
+
+	fn transaction(&self, _id: TransactionID) -> Option<LocalizedTransaction> {
 		unimplemented!();
 	}
 
-	fn blocks_with_bloom(&self, _bloom: &H2048, _from_block: BlockId, _to_block: BlockId) -> Option<Vec<BlockNumber>> {
+	fn uncle(&self, _id: UncleID) -> Option<BlockHeader> {
+		unimplemented!();
+	}
+
+	fn transaction_receipt(&self, id: TransactionID) -> Option<LocalizedReceipt> {
+		self.receipts.read().unwrap().get(&id).cloned()
+	}
+
+	fn blocks_with_bloom(&self, _bloom: &H2048, _from_block: BlockID, _to_block: BlockID) -> Option<Vec<BlockNumber>> {
 		unimplemented!();
 	}
 
@@ -217,19 +320,15 @@ impl BlockChainClient for TestBlockChainClient {
 		unimplemented!();
 	}
 
-	fn prepare_sealing(&self, _author: Address, _gas_floor_target: U256, _extra_data: Bytes, _transactions: Vec<SignedTransaction>) -> Option<ClosedBlock> {
-		unimplemented!()
+	fn last_hashes(&self) -> LastHashes {
+		unimplemented!();
 	}
 
-	fn try_seal(&self, _block: ClosedBlock, _seal: Vec<Bytes>) -> Result<SealedBlock, ClosedBlock> {
-		unimplemented!()
-	}
-
-	fn block_header(&self, id: BlockId) -> Option<Bytes> {
+	fn block_header(&self, id: BlockID) -> Option<Bytes> {
 		self.block_hash(id).and_then(|hash| self.blocks.read().unwrap().get(&hash).map(|r| Rlp::new(r).at(0).as_raw().to_vec()))
 	}
 
-	fn block_body(&self, id: BlockId) -> Option<Bytes> {
+	fn block_body(&self, id: BlockID) -> Option<Bytes> {
 		self.block_hash(id).and_then(|hash| self.blocks.read().unwrap().get(&hash).map(|r| {
 			let mut stream = RlpStream::new_list(2);
 			stream.append_raw(Rlp::new(&r).at(1).as_raw(), 1);
@@ -238,14 +337,14 @@ impl BlockChainClient for TestBlockChainClient {
 		}))
 	}
 
-	fn block(&self, id: BlockId) -> Option<Bytes> {
+	fn block(&self, id: BlockID) -> Option<Bytes> {
 		self.block_hash(id).and_then(|hash| self.blocks.read().unwrap().get(&hash).cloned())
 	}
 
-	fn block_status(&self, id: BlockId) -> BlockStatus {
+	fn block_status(&self, id: BlockID) -> BlockStatus {
 		match id {
-			BlockId::Number(number) if (number as usize) < self.blocks.read().unwrap().len() => BlockStatus::InChain,
-			BlockId::Hash(ref hash) if self.blocks.read().unwrap().get(hash).is_some() => BlockStatus::InChain,
+			BlockID::Number(number) if (number as usize) < self.blocks.read().unwrap().len() => BlockStatus::InChain,
+			BlockID::Hash(ref hash) if self.blocks.read().unwrap().get(hash).is_some() => BlockStatus::InChain,
 			_ => BlockStatus::Unknown
 		}
 	}
@@ -280,6 +379,10 @@ impl BlockChainClient for TestBlockChainClient {
 		})
 	}
 
+	fn find_uncles(&self, _hash: &H256) -> Option<Vec<H256>> {
+		None
+	}
+
 	// TODO: returns just hashes instead of node state rlp(?)
 	fn state_data(&self, hash: &H256) -> Option<Bytes> {
 		// starts with 'f' ?
@@ -352,7 +455,7 @@ impl BlockChainClient for TestBlockChainClient {
 
 	fn queue_info(&self) -> BlockQueueInfo {
 		BlockQueueInfo {
-			verified_queue_size: 0,
+			verified_queue_size: self.queue_size.load(AtomicOrder::Relaxed),
 			unverified_queue_size: 0,
 			verifying_queue_size: 0,
 			max_queue_size: 0,
@@ -373,4 +476,30 @@ impl BlockChainClient for TestBlockChainClient {
 			best_block_number: self.blocks.read().unwrap().len() as BlockNumber - 1,
 		}
 	}
+
+	fn filter_traces(&self, _filter: TraceFilter) -> Option<Vec<LocalizedTrace>> {
+		unimplemented!();
+	}
+
+	fn trace(&self, _trace: TraceId) -> Option<LocalizedTrace> {
+		unimplemented!();
+	}
+
+	fn transaction_traces(&self, _trace: TransactionID) -> Option<Vec<LocalizedTrace>> {
+		unimplemented!();
+	}
+
+	fn block_traces(&self, _trace: BlockID) -> Option<Vec<LocalizedTrace>> {
+		unimplemented!();
+	}
+
+	fn queue_transactions(&self, transactions: Vec<Bytes>) {
+		// import right here
+		let txs = transactions.into_iter().filter_map(|bytes| UntrustedRlp::new(&bytes).as_val().ok()).collect();
+		self.miner.import_external_transactions(self, txs);
+	}
+
+	fn pending_transactions(&self) -> Vec<SignedTransaction> {
+		self.miner.pending_transactions()
+	}
 }

ethcore/src/client/trace.rs

@@ -0,0 +1,38 @@
+
+//! Bridge between Tracedb and Blockchain.
+
+use std::ops::Range;
+use util::{Address, H256};
+use header::BlockNumber;
+use trace::DatabaseExtras as TraceDatabaseExtras;
+use blockchain::{BlockChain, BlockProvider};
+use blockchain::extras::TransactionAddress;
+use super::BlockID;
+
+impl TraceDatabaseExtras for BlockChain {
+	fn block_hash(&self, block_number: BlockNumber) -> Option<H256> {
+		(self as &BlockProvider).block_hash(block_number)
+	}
+
+	fn transaction_hash(&self, block_number: BlockNumber, tx_position: usize) -> Option<H256> {
+		(self as &BlockProvider).block_hash(block_number)
+			.and_then(|block_hash| {
+				let tx_address = TransactionAddress {
+					block_hash: block_hash,
+					index: tx_position
+				};
+				self.transaction(&tx_address)
+			})
+			.map(|tx| tx.hash())
+	}
+}
+
+/// Easy to use trace filter.
+pub struct Filter {
+	/// Range of filtering.
+	pub range: Range<BlockID>,
+	/// From address.
+	pub from_address: Vec<Address>,
+	/// To address.
+	pub to_address: Vec<Address>,
+}

ethcore/src/common.rs

@@ -25,4 +25,4 @@ pub use account::*;
 pub use transaction::*;
 pub use log_entry::*;
 pub use receipt::*;
-pub use action_params::*;
+pub use action_params::*;

ethcore/src/db.rs

@@ -0,0 +1,181 @@
+// 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/>.
+
+//! Extras db utils.
+
+use std::ops::Deref;
+use std::hash::Hash;
+use std::sync::RwLock;
+use std::collections::HashMap;
+use util::{DBTransaction, Database};
+use util::rlp::{encode, Encodable, decode, Decodable};
+
+#[derive(Clone, Copy)]
+pub enum CacheUpdatePolicy {
+	Overwrite,
+	Remove,
+}
+
+pub trait Cache<K, V> {
+	fn insert(&mut self, k: K, v: V) -> Option<V>;
+
+	fn remove(&mut self, k: &K) -> Option<V>;
+
+	fn get(&self, k: &K) -> Option<&V>;
+}
+
+impl<K, V> Cache<K, V> for HashMap<K, V> where K: Hash + Eq {
+	fn insert(&mut self, k: K, v: V) -> Option<V> {
+		HashMap::insert(self, k, v)
+	}
+
+	fn remove(&mut self, k: &K) -> Option<V> {
+		HashMap::remove(self, k)
+	}
+
+	fn get(&self, k: &K) -> Option<&V> {
+		HashMap::get(self, k)
+	}
+}
+
+/// Should be used to get database key associated with given value.
+pub trait Key<T> {
+	type Target: Deref<Target = [u8]>;
+
+	/// Returns db key.
+	fn key(&self) -> Self::Target;
+}
+
+/// Should be used to write value into database.
+pub trait Writable {
+	/// Writes the value into the database.
+	fn write<T, R>(&self, key: &Key<T, Target = R>, value: &T) where T: Encodable, R: Deref<Target = [u8]>;
+
+	/// Writes the value into the database and updates the cache.
+	fn write_with_cache<K, T, R>(&self, cache: &mut Cache<K, T>, key: K, value: T, policy: CacheUpdatePolicy) where
+	K: Key<T, Target = R> + Hash + Eq,
+	T: Encodable,
+	R: Deref<Target = [u8]> {
+		self.write(&key, &value);
+		match policy {
+			CacheUpdatePolicy::Overwrite => {
+				cache.insert(key, value);
+			},
+			CacheUpdatePolicy::Remove => {
+				cache.remove(&key);
+			}
+		}
+	}
+
+	/// Writes the values into the database and updates the cache.
+	fn extend_with_cache<K, T, R>(&self, cache: &mut Cache<K, T>, values: HashMap<K, T>, policy: CacheUpdatePolicy) where
+	K: Key<T, Target = R> + Hash + Eq,
+	T: Encodable,
+	R: Deref<Target = [u8]> {
+		match policy {
+			CacheUpdatePolicy::Overwrite => {
+				for (key, value) in values.into_iter() {
+					self.write(&key, &value);
+					cache.insert(key, value);
+				}
+			},
+			CacheUpdatePolicy::Remove => {
+				for (key, value) in &values {
+					self.write(key, value);
+					cache.remove(key);
+				}
+			},
+		}
+	}
+}
+
+/// Should be used to read values from database.
+pub trait Readable {
+	/// Returns value for given key.
+	fn read<T, R>(&self, key: &Key<T, Target = R>) -> Option<T> where
+	T: Decodable,
+	R: Deref<Target = [u8]>;
+
+	/// Returns value for given key either in cache or in database.
+	fn read_with_cache<K, T, C>(&self, cache: &RwLock<C>, key: &K) -> Option<T> where
+		K: Key<T> + Eq + Hash + Clone,
+		T: Clone + Decodable,
+		C: Cache<K, T> {
+		{
+			let read = cache.read().unwrap();
+			if let Some(v) = read.get(key) {
+				return Some(v.clone());
+			}
+		}
+
+		self.read(key).map(|value: T|{
+			let mut write = cache.write().unwrap();
+			write.insert(key.clone(), value.clone());
+			value
+		})
+	}
+
+	/// Returns true if given value exists.
+	fn exists<T, R>(&self, key: &Key<T, Target = R>) -> bool where R: Deref<Target= [u8]>;
+
+	/// Returns true if given value exists either in cache or in database.
+	fn exists_with_cache<K, T, R, C>(&self, cache: &RwLock<C>, key: &K) -> bool where
+	K: Eq + Hash + Key<T, Target = R>,
+	R: Deref<Target = [u8]>,
+	C: Cache<K, T> {
+		{
+			let read = cache.read().unwrap();
+			if read.get(key).is_some() {
+				return true;
+			}
+		}
+
+		self.exists::<T, R>(key)
+	}
+}
+
+impl Writable for DBTransaction {
+	fn write<T, R>(&self, key: &Key<T, Target = R>, value: &T) where T: Encodable, R: Deref<Target = [u8]> {
+		let result = self.put(&key.key(), &encode(value));
+		if let Err(err) = result {
+			panic!("db put failed, key: {:?}, err: {:?}", &key.key() as &[u8], err);
+		}
+	}
+}
+
+impl Readable for Database {
+	fn read<T, R>(&self, key: &Key<T, Target = R>) -> Option<T> where T: Decodable, R: Deref<Target = [u8]> {
+		let result = self.get(&key.key());
+
+		match result {
+			Ok(option) => option.map(|v| decode(&v)),
+			Err(err) => {
+				panic!("db get failed, key: {:?}, err: {:?}", &key.key() as &[u8], err);
+			}
+		}
+	}
+
+	fn exists<T, R>(&self, key: &Key<T, Target = R>) -> bool where R: Deref<Target = [u8]> {
+		let result = self.get(&key.key());
+
+		match result {
+			Ok(v) => v.is_some(),
+			Err(err) => {
+				panic!("db get failed, key: {:?}, err: {:?}", &key.key() as &[u8], err);
+			}
+		}
+	}
+}

ethcore/src/engine.rs

@@ -14,18 +14,20 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+//! Consensus engine specification
+
 use common::*;
+use account_provider::AccountProvider;
 use block::ExecutedBlock;
-use spec::Spec;
+use spec::CommonParams;
 use evm::Schedule;
-use evm::Factory;
 
 /// A consensus mechanism for the chain. Generally either proof-of-work or proof-of-stake-based.
 /// Provides hooks into each of the major parts of block import.
 pub trait Engine : Sync + Send {
 	/// The name of this engine.
 	fn name(&self) -> &str;
-	/// The version of this engine. Should be of the form 
+	/// The version of this engine. Should be of the form
 	fn version(&self) -> SemanticVersion { SemanticVersion::new(0, 0, 0) }
 
 	/// The number of additional header fields required for this engine.
@@ -35,37 +37,46 @@ pub trait Engine : Sync + Send {
 	fn extra_info(&self, _header: &Header) -> HashMap<String, String> { HashMap::new() }
 
 	/// Get the general parameters of the chain.
-	fn spec(&self) -> &Spec;
-
-	/// Get current EVM factory
-	fn vm_factory(&self) -> &Factory;
+	fn params(&self) -> &CommonParams;
 
 	/// Get the EVM schedule for the given `env_info`.
 	fn schedule(&self, env_info: &EnvInfo) -> Schedule;
 
+	/// Builtin-contracts we would like to see in the chain.
+	/// (In principle these are just hints for the engine since that has the last word on them.)
+	fn builtins(&self) -> &BTreeMap<Address, Builtin>;
+
 	/// Some intrinsic operation parameters; by default they take their value from the `spec()`'s `engine_params`.
-	fn maximum_extra_data_size(&self) -> usize { decode(&self.spec().engine_params.get("maximumExtraDataSize").unwrap()) }
+	fn maximum_extra_data_size(&self) -> usize { self.params().maximum_extra_data_size }
 	/// Maximum number of uncles a block is allowed to declare.
 	fn maximum_uncle_count(&self) -> usize { 2 }
 	/// The number of generations back that uncles can be.
 	fn maximum_uncle_age(&self) -> usize { 6 }
 	/// The nonce with which accounts begin.
-	fn account_start_nonce(&self) -> U256 { decode(&self.spec().engine_params.get("accountStartNonce").unwrap()) }
+	fn account_start_nonce(&self) -> U256 { self.params().account_start_nonce }
 
 	/// Block transformation functions, before the transactions.
 	fn on_new_block(&self, _block: &mut ExecutedBlock) {}
 	/// Block transformation functions, after the transactions.
 	fn on_close_block(&self, _block: &mut ExecutedBlock) {}
 
-	/// Phase 1 quick block verification. Only does checks that are cheap. `block` (the header's full block) 
+	/// Attempt to seal the block internally.
+	///
+	/// If `Some` is returned, then you get a valid seal.
+	///
+	/// This operation is synchronous and may (quite reasonably) not be available, in which None will
+	/// be returned.
+	fn generate_seal(&self, _block: &ExecutedBlock, _accounts: Option<&AccountProvider>) -> Option<Vec<Bytes>> { None }
+
+	/// Phase 1 quick block verification. Only does checks that are cheap. `block` (the header's full block)
 	/// may be provided for additional checks. Returns either a null `Ok` or a general error detailing the problem with import.
 	fn verify_block_basic(&self, _header: &Header,  _block: Option<&[u8]>) -> Result<(), Error> { Ok(()) }
 
-	/// Phase 2 verification. Perform costly checks such as transaction signatures. `block` (the header's full block) 
+	/// Phase 2 verification. Perform costly checks such as transaction signatures. `block` (the header's full block)
 	/// may be provided for additional checks. Returns either a null `Ok` or a general error detailing the problem with import.
 	fn verify_block_unordered(&self, _header: &Header, _block: Option<&[u8]>) -> Result<(), Error> { Ok(()) }
 
-	/// Phase 3 verification. Check block information against parent and uncles. `block` (the header's full block) 
+	/// Phase 3 verification. Check block information against parent and uncles. `block` (the header's full block)
 	/// may be provided for additional checks. Returns either a null `Ok` or a general error detailing the problem with import.
 	fn verify_block_family(&self, _header: &Header, _parent: &Header, _block: Option<&[u8]>) -> Result<(), Error> { Ok(()) }
 
@@ -85,7 +96,7 @@ pub trait Engine : Sync + Send {
 
 	/// Don't forget to call Super::populate_from_parent when subclassing & overriding.
 	// TODO: consider including State in the params.
-	fn populate_from_parent(&self, header: &mut Header, parent: &Header, _gas_floor_target: U256) {
+	fn populate_from_parent(&self, header: &mut Header, parent: &Header, _gas_floor_target: U256, _gas_ceil_target: U256) {
 		header.difficulty = parent.difficulty;
 		header.gas_limit = parent.gas_limit;
 		header.note_dirty();
@@ -94,13 +105,13 @@ pub trait Engine : Sync + Send {
 	// TODO: builtin contract routing - to do this properly, it will require removing the built-in configuration-reading logic
 	// from Spec into here and removing the Spec::builtins field.
 	/// Determine whether a particular address is a builtin contract.
-	fn is_builtin(&self, a: &Address) -> bool { self.spec().builtins.contains_key(a) }
+	fn is_builtin(&self, a: &Address) -> bool { self.builtins().contains_key(a) }
 	/// Determine the code execution cost of the builtin contract with address `a`.
 	/// Panics if `is_builtin(a)` is not true.
-	fn cost_of_builtin(&self, a: &Address, input: &[u8]) -> U256 { self.spec().builtins.get(a).unwrap().cost(input.len()) }
+	fn cost_of_builtin(&self, a: &Address, input: &[u8]) -> U256 { self.builtins().get(a).unwrap().cost(input.len()) }
 	/// Execution the builtin contract `a` on `input` and return `output`.
 	/// Panics if `is_builtin(a)` is not true.
-	fn execute_builtin(&self, a: &Address, input: &[u8], output: &mut [u8]) { self.spec().builtins.get(a).unwrap().execute(input, output); }
+	fn execute_builtin(&self, a: &Address, input: &[u8], output: &mut [u8]) { self.builtins().get(a).unwrap().execute(input, output); }
 
 	// TODO: sealing stuff - though might want to leave this for later.
 }

ethcore/src/env_info.rs

@@ -16,6 +16,7 @@
 
 use util::*;
 use header::BlockNumber;
+use ethjson;
 
 /// Simple vector of hashes, should be at most 256 items large, can be smaller if being used
 /// for a block whose number is less than 257.
@@ -46,25 +47,25 @@ impl Default for EnvInfo {
 			number: 0,
 			author: Address::new(),
 			timestamp: 0,
-			difficulty: x!(0),
-			gas_limit: x!(0),
+			difficulty: 0.into(),
+			gas_limit: 0.into(),
 			last_hashes: vec![],
-			gas_used: x!(0),
+			gas_used: 0.into(),
 		}
 	}
 }
 
-impl FromJson for EnvInfo {
-	fn from_json(json: &Json) -> EnvInfo {
-		let current_number: u64 = xjson!(&json["currentNumber"]);
+impl From<ethjson::vm::Env> for EnvInfo {
+	fn from(e: ethjson::vm::Env) -> Self {
+		let number = e.number.into();
 		EnvInfo {
-			number: current_number,
-			author: xjson!(&json["currentCoinbase"]),
-			difficulty: xjson!(&json["currentDifficulty"]),
-			gas_limit: xjson!(&json["currentGasLimit"]),
-			timestamp: xjson!(&json["currentTimestamp"]),
-			last_hashes: (1..cmp::min(current_number + 1, 257)).map(|i| format!("{}", current_number - i).as_bytes().sha3()).collect(),
-			gas_used: x!(0),
+			number: number,
+			author: e.author.into(),
+			difficulty: e.difficulty.into(),
+			gas_limit: e.gas_limit.into(),
+			timestamp: e.timestamp.into(),
+			last_hashes: (1..cmp::min(number + 1, 257)).map(|i| format!("{}", number - i).as_bytes().sha3()).collect(),
+			gas_used: U256::zero(),
 		}
 	}
 }
@@ -74,36 +75,32 @@ mod tests {
 	extern crate rustc_serialize;
 
 	use super::*;
-	use rustc_serialize::*;
-	use util::from_json::FromJson;
 	use util::hash::*;
+	use util::numbers::U256;
 	use std::str::FromStr;
+	use ethjson;
 
 	#[test]
 	fn it_serializes_form_json() {
-		let env_info = EnvInfo::from_json(&json::Json::from_str(
-r#"
-	{
-		"currentCoinbase": "0x000000f00000000f000000000000f00000000f00",
-		"currentNumber": 1112339,
-		"currentDifficulty": 50000,
-		"currentGasLimit" : 40000,
-		"currentTimestamp" : 1100
-	}
-"#
-		).unwrap());
+		let env_info = EnvInfo::from(ethjson::vm::Env {
+			author: ethjson::hash::Address(Address::from_str("000000f00000000f000000000000f00000000f00").unwrap()),
+			number: ethjson::uint::Uint(U256::from(1_112_339)),
+			difficulty: ethjson::uint::Uint(U256::from(50_000)),
+			gas_limit: ethjson::uint::Uint(U256::from(40_000)),
+			timestamp: ethjson::uint::Uint(U256::from(1_100))
+		});
 
 		assert_eq!(env_info.number, 1112339);
 		assert_eq!(env_info.author, Address::from_str("000000f00000000f000000000000f00000000f00").unwrap());
-		assert_eq!(env_info.gas_limit, x!(40000));
-		assert_eq!(env_info.difficulty, x!(50000));
-		assert_eq!(env_info.gas_used, x!(0));
+		assert_eq!(env_info.gas_limit, 40000.into());
+		assert_eq!(env_info.difficulty, 50000.into());
+		assert_eq!(env_info.gas_used, 0.into());
 	}
 
 	#[test]
 	fn it_can_be_created_as_default() {
 		let default_env_info = EnvInfo::default();
 
-		assert_eq!(default_env_info.difficulty, x!(0));
+		assert_eq!(default_env_info.difficulty, 0.into());
 	}
 }

ethcore/src/error.rs

@@ -19,63 +19,69 @@
 use util::*;
 use header::BlockNumber;
 use basic_types::LogBloom;
+use client::Error as ClientError;
 
-/// Result of executing the transaction.
-#[derive(PartialEq, Debug)]
-pub enum ExecutionError {
-	/// Returned when there gas paid for transaction execution is
-	/// lower than base gas required.
-	NotEnoughBaseGas {
-		/// Absolute minimum gas required.
-		required: U256,
-		/// Gas provided.
-		got: U256
-	},
-	/// Returned when block (gas_used + gas) > gas_limit.
-	///
-	/// If gas =< gas_limit, upstream may try to execute the transaction
-	/// in next block.
-	BlockGasLimitReached {
-		/// Gas limit of block for transaction.
-		gas_limit: U256,
-		/// Gas used in block prior to transaction.
-		gas_used: U256,
-		/// Amount of gas in block.
-		gas: U256
-	},
-	/// Returned when transaction nonce does not match state nonce.
-	InvalidNonce {
-		/// Nonce expected.
-		expected: U256,
-		/// Nonce found.
-		got: U256
-	},
-	/// Returned when cost of transaction (value + gas_price * gas) exceeds
-	/// current sender balance.
-	NotEnoughCash {
-		/// Minimum required balance.
-		required: U512,
-		/// Actual balance.
-		got: U512
-	},
-	/// Returned when internal evm error occurs.
-	Internal
-}
+pub use types::executed::ExecutionError;
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 /// Errors concerning transaction processing.
 pub enum TransactionError {
+	/// Transaction is already imported to the queue
+	AlreadyImported,
+	/// Transaction is not valid anymore (state already has higher nonce)
+	Old,
+	/// Transaction has too low fee
+	/// (there is already a transaction with the same sender-nonce but higher gas price)
+	TooCheapToReplace,
+	/// Transaction was not imported to the queue because limit has been reached.
+	LimitReached,
 	/// Transaction's gas price is below threshold.
 	InsufficientGasPrice {
 		/// Minimal expected gas price
 		minimal: U256,
 		/// Transaction gas price
-		got: U256
+		got: U256,
+	},
+	/// Sender doesn't have enough funds to pay for this transaction
+	InsufficientBalance {
+		/// Senders balance
+		balance: U256,
+		/// Transaction cost
+		cost: U256,
+	},
+	/// Transactions gas is higher then current gas limit
+	GasLimitExceeded {
+		/// Current gas limit
+		limit: U256,
+		/// Declared transaction gas
+		got: U256,
 	},
 	/// Transaction's gas limit (aka gas) is invalid.
 	InvalidGasLimit(OutOfBounds<U256>),
 }
 
+impl fmt::Display for TransactionError {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		use self::TransactionError::*;
+		let msg = match *self {
+			AlreadyImported => "Already imported".into(),
+			Old => "No longer valid".into(),
+			TooCheapToReplace => "Gas price too low to replace".into(),
+			LimitReached => "Transaction limit reached".into(),
+			InsufficientGasPrice { minimal, got } =>
+				format!("Insufficient gas price. Min={}, Given={}", minimal, got),
+			InsufficientBalance { balance, cost } =>
+				format!("Insufficient balance for transaction. Balance={}, Cost={}",
+					balance, cost),
+			GasLimitExceeded { limit, got } =>
+				format!("Gas limit exceeded. Limit={}, Given={}", limit, got),
+			InvalidGasLimit(ref err) => format!("Invalid gas limit. {}", err),
+		};
+
+		f.write_fmt(format_args!("Transaction error ({})", msg))
+	}
+}
+
 #[derive(Debug, PartialEq, Eq)]
 /// Errors concerning block processing.
 pub enum BlockError {
@@ -114,6 +120,8 @@ pub enum BlockError {
 	MismatchedH256SealElement(Mismatch<H256>),
 	/// Proof-of-work aspect of seal, which we assume is a 256-bit value, is invalid.
 	InvalidProofOfWork(OutOfBounds<U256>),
+	/// Some low-level aspect of the seal is incorrect.
+	InvalidSeal,
 	/// Gas limit header field is invalid.
 	InvalidGasLimit(OutOfBounds<U256>),
 	/// Receipts trie root header field is invalid.
@@ -135,7 +143,44 @@ pub enum BlockError {
 	UnknownUncleParent(H256),
 }
 
-#[derive(Debug)]
+impl fmt::Display for BlockError {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		use self::BlockError::*;
+
+		let msg = match *self {
+			TooManyUncles(ref oob) => format!("Block has too many uncles. {}", oob),
+			ExtraDataOutOfBounds(ref oob) => format!("Extra block data too long. {}", oob),
+			InvalidSealArity(ref mis) => format!("Block seal in incorrect format: {}", mis),
+			TooMuchGasUsed(ref oob) => format!("Block has too much gas used. {}", oob),
+			InvalidUnclesHash(ref mis) => format!("Block has invalid uncles hash: {}", mis),
+			UncleTooOld(ref oob) => format!("Uncle block is too old. {}", oob),
+			UncleIsBrother(ref oob) => format!("Uncle from same generation as block. {}", oob),
+			UncleInChain(ref hash) => format!("Uncle {} already in chain", hash),
+			UncleParentNotInChain(ref hash) => format!("Uncle {} has a parent not in the chain", hash),
+			InvalidStateRoot(ref mis) => format!("Invalid state root in header: {}", mis),
+			InvalidGasUsed(ref mis) => format!("Invalid gas used in header: {}", mis),
+			InvalidTransactionsRoot(ref mis) => format!("Invalid transactions root in header: {}", mis),
+			DifficultyOutOfBounds(ref oob) => format!("Invalid block difficulty: {}", oob),
+			InvalidDifficulty(ref mis) => format!("Invalid block difficulty: {}", mis),
+			MismatchedH256SealElement(ref mis) => format!("Seal element out of bounds: {}", mis),
+			InvalidProofOfWork(ref oob) => format!("Block has invalid PoW: {}", oob),
+			InvalidSeal => "Block has invalid seal.".into(),
+			InvalidGasLimit(ref oob) => format!("Invalid gas limit: {}", oob),
+			InvalidReceiptsRoot(ref mis) => format!("Invalid receipts trie root in header: {}", mis),
+			InvalidTimestamp(ref oob) => format!("Invalid timestamp in header: {}", oob),
+			InvalidLogBloom(ref oob) => format!("Invalid log bloom in header: {}", oob),
+			InvalidParentHash(ref mis) => format!("Invalid parent hash: {}", mis),
+			InvalidNumber(ref mis) => format!("Invalid number in header: {}", mis),
+			RidiculousNumber(ref oob) => format!("Implausible block number. {}", oob),
+			UnknownParent(ref hash) => format!("Unknown parent: {}", hash),
+			UnknownUncleParent(ref hash) => format!("Unknown uncle parent: {}", hash),
+		};
+
+		f.write_fmt(format_args!("Block error ({})", msg))
+	}
+}
+
+#[derive(Debug, PartialEq)]
 /// Import to the block queue result
 pub enum ImportError {
 	/// Already in the block chain.
@@ -146,9 +191,23 @@ pub enum ImportError {
 	KnownBad,
 }
 
+impl fmt::Display for ImportError {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		let msg = match *self {
+			ImportError::AlreadyInChain => "block already in chain",
+			ImportError::AlreadyQueued => "block already in the block queue",
+			ImportError::KnownBad => "block known to be bad",
+		};
+
+		f.write_fmt(format_args!("Block import error ({})", msg))
+	}
+}
+
 #[derive(Debug)]
 /// General error type which should be capable of representing all errors in ethcore.
 pub enum Error {
+	/// Client configuration error.
+	Client(ClientError),
 	/// Error concerning a utility.
 	Util(UtilError),
 	/// Error concerning block processing.
@@ -165,11 +224,37 @@ pub enum Error {
 	PowHashInvalid,
 	/// The value of the nonce or mishash is invalid.
 	PowInvalid,
+	/// Error concerning TrieDBs
+	Trie(TrieError),
+}
+
+impl fmt::Display for Error {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		match *self {
+			Error::Client(ref err) => f.write_fmt(format_args!("{}", err)),
+			Error::Util(ref err) => f.write_fmt(format_args!("{}", err)),
+			Error::Block(ref err) => f.write_fmt(format_args!("{}", err)),
+			Error::Execution(ref err) => f.write_fmt(format_args!("{}", err)),
+			Error::Transaction(ref err) => f.write_fmt(format_args!("{}", err)),
+			Error::Import(ref err) => f.write_fmt(format_args!("{}", err)),
+			Error::UnknownEngineName(ref name) =>
+				f.write_fmt(format_args!("Unknown engine name ({})", name)),
+			Error::PowHashInvalid => f.write_str("Invalid or out of date PoW hash."),
+			Error::PowInvalid => f.write_str("Invalid nonce or mishash"),
+			Error::Trie(ref err) => f.write_fmt(format_args!("{}", err)),
+		}
+	}
 }
 
 /// Result of import block operation.
 pub type ImportResult = Result<H256, Error>;
 
+impl From<ClientError> for Error {
+	fn from(err: ClientError) -> Error {
+		Error::Client(err)
+	}
+}
+
 impl From<TransactionError> for Error {
 	fn from(err: TransactionError) -> Error {
 		Error::Transaction(err)
@@ -218,6 +303,12 @@ impl From<IoError> for Error {
 	}
 }
 
+impl From<TrieError> for Error {
+	fn from(err: TrieError) -> Error {
+		Error::Trie(err)
+	}
+}
+
 // TODO: uncomment below once https://github.com/rust-lang/rust/issues/27336 sorted.
 /*#![feature(concat_idents)]
 macro_rules! assimilate {