update gitlab-ci

set RUST 1.11 for windows
Merge pull request #2414 from ethcore/compilation-beta
2016-10-04 14:43:49 +08:00 · 2016-10-02 21:07:35 +02:00 · 2016-10-02 19:52:53 +02:00 · 2016-10-02 09:45:27 +02:00 · 2016-10-01 15:29:11 +03:00 · 2016-10-01 13:04:08 +03:00
151 changed files with 4215 additions and 1659 deletions
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,6 +1,6 @@
 stages:
  - build
-  - deploy
+  - test
 variables:
  GIT_DEPTH: "3"
  SIMPLECOV: "true" 
@@ -8,9 +8,60 @@ variables:
 cache:
  key: "$CI_BUILD_NAME/$CI_BUILD_REF_NAME"
  untracked: true
+linux-stable:
+  stage: build
+  image: ethcore/rust:stable
+  only:
+    - master
+    - beta
+    - tags
+    - stable
+  script:
+    - cargo build --release --verbose
+    - strip target/release/parity
+    - md5sum target/release/parity >> checksum
+    - aws configure set aws_access_key_id $s3_key 
+    - aws configure set aws_secret_access_key $s3_secret
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/parity --body target/release/parity
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/checksum --body checksum
+  tags:
+    - rust
+    - rust-stable
+  artifacts:
+    paths:
+    - target/release/parity
+    name: "stable-x86_64-unknown-linux-gnu_parity"
+linux-stable-14.04:
+  stage: build
+  image: ethcore/rust-14.04:latest
+  only:
+    - master
+    - beta
+    - tags
+    - stable
+  script:
+    - cargo build --release --verbose
+    - strip target/release/parity
+    - md5sum target/release/parity >> checksum
+    - aws configure set aws_access_key_id $s3_key 
+    - aws configure set aws_secret_access_key $s3_secret
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-ubuntu_14_04-gnu/parity --body target/release/parity
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-ubuntu_14_04-gnu/checksum --body checksum
+  tags:
+    - rust
+    - rust-14.04
+  artifacts:
+    paths:
+    - target/release/parity
+    name: "stable-x86_64-unknown-ubuntu_14_04-gnu_parity"
 linux-beta:
  stage: build
  image: ethcore/rust:beta
+  only:
+    - master
+    - beta
+    - tags
+    - stable
  script:
    - cargo build --release --verbose
    - strip target/release/parity
@@ -20,23 +71,16 @@ linux-beta:
  artifacts:
    paths:
    - target/release/parity
-    name: "${CI_BUILD_NAME}_parity"
-linux-stable:
-  stage: build
-  image: ethcore/rust:stable
-  script:
-    - cargo build --release --verbose
-    - strip target/release/parity
-  tags:
-    - rust
-    - rust-stable
-  artifacts:
-    paths:
-    - target/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    name: "beta-x86_64-unknown-linux-gnu_parity"
+  allow_failure: true
 linux-nightly:
  stage: build
  image: ethcore/rust:nightly
+  only:
+    - master
+    - beta
+    - tags
+    - stable
  script:
    - cargo build --release --verbose
    - strip target/release/parity
@@ -46,121 +90,203 @@ linux-nightly:
  artifacts:
    paths:
    - target/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    name: "nigthly-x86_64-unknown-linux-gnu_parity"
+  allow_failure: true
 linux-centos:
  stage: build
  image: ethcore/rust-centos:latest
+  only:
+    - master
+    - beta
+    - tags
+    - stable
  script:
    - export CXX="g++"
    - export CC="gcc"
    - cargo build --release --verbose
    - strip target/release/parity
+    - md5sum target/release/parity >> checksum
+    - aws configure set aws_access_key_id $s3_key 
+    - aws configure set aws_secret_access_key $s3_secret
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-centos-gnu/parity --body target/release/parity
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-centos-gnu/checksum --body checksum
  tags:
    - rust
    - rust-centos
  artifacts:
    paths:
    - target/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    name: "x86_64-unknown-centos-gnu_parity"
 linux-armv7:
  stage: build
-  image: ethcore/rust-arm:latest
+  image: ethcore/rust-armv7:latest
+  only:
+    - master
+    - beta
+    - tags
+    - stable
  script:
-    - export CXX=arm-linux-gnueabihf-g++
-    - export CC=arm-linux-gnueabihf-gcc
+    - rm -rf .cargo
    - mkdir -p .cargo
    - echo "[target.armv7-unknown-linux-gnueabihf]" >> .cargo/config
    - echo "linker= \"arm-linux-gnueabihf-gcc\"" >> .cargo/config
    - cat .cargo/config
    - cargo build --target armv7-unknown-linux-gnueabihf --release --verbose
    - arm-linux-gnueabihf-strip target/armv7-unknown-linux-gnueabihf/release/parity
+    - md5sum target/armv7-unknown-linux-gnueabihf/release/parity >> checksum
+    - aws configure set aws_access_key_id $s3_key 
+    - aws configure set aws_secret_access_key $s3_secret
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/parity --body target/armv7-unknown-linux-gnueabihf/release/parity
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/checksum --body checksum
  tags:
    - rust
    - rust-arm
  artifacts:
    paths:
    - target/armv7-unknown-linux-gnueabihf/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    name: "armv7_unknown_linux_gnueabihf_parity"
+  allow_failure: true
 linux-arm:
  stage: build
  image: ethcore/rust-arm:latest
+  only:
+    - master
+    - beta
+    - tags
+    - stable
  script:
-    - export CXX=arm-linux-gnueabihf-g++
-    - export CC=arm-linux-gnueabihf-gcc
+    - rm -rf .cargo
    - mkdir -p .cargo
    - echo "[target.arm-unknown-linux-gnueabihf]" >> .cargo/config
    - echo "linker= \"arm-linux-gnueabihf-gcc\"" >> .cargo/config
    - cat .cargo/config
    - cargo build --target arm-unknown-linux-gnueabihf --release --verbose
    - arm-linux-gnueabihf-strip target/arm-unknown-linux-gnueabihf/release/parity
+    - md5sum target/arm-unknown-linux-gnueabihf/release/parity >> checksum
+    - aws configure set aws_access_key_id $s3_key 
+    - aws configure set aws_secret_access_key $s3_secret
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/parity --body target/arm-unknown-linux-gnueabihf/release/parity
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/checksum --body checksum
  tags:
    - rust
    - rust-arm
  artifacts:
    paths:
    - target/arm-unknown-linux-gnueabihf/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    name: "arm-unknown-linux-gnueabihf_parity"
+  allow_failure: true
 linux-armv6:
  stage: build
-  image: ethcore/rust-arm:latest
+  image: ethcore/rust-armv6:latest
+  only:
+    - master
+    - beta
+    - tags
+    - stable
  script:
-    - export CXX=arm-linux-gnueabi-g++
-    - export CC=arm-linux-gnueabi-gcc
+    - rm -rf .cargo
    - mkdir -p .cargo
    - echo "[target.arm-unknown-linux-gnueabi]" >> .cargo/config
    - echo "linker= \"arm-linux-gnueabi-gcc\"" >> .cargo/config
    - cat .cargo/config
    - cargo build --target arm-unknown-linux-gnueabi --release --verbose
    - arm-linux-gnueabi-strip target/arm-unknown-linux-gnueabi/release/parity
+    - md5sum target/arm-unknown-linux-gnueabi/release/parity >> checksum 
+    - aws configure set aws_access_key_id $s3_key 
+    - aws configure set aws_secret_access_key $s3_secret
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabi/parity --body target/arm-unknown-linux-gnueabi/release/parity
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabi/checksum --body checksum
  tags:
    - rust
    - rust-arm
  artifacts:
    paths:
    - target/arm-unknown-linux-gnueabi/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    name: "arm-unknown-linux-gnueabi_parity"
+  allow_failure: true
 linux-aarch64:
  stage: build
-  image: ethcore/rust-arm:latest
+  image: ethcore/rust-aarch64:latest
+  only:
+    - master
+    - beta
+    - tags
+    - stable
  script:
-    - export CXX=aarch64-linux-gnu-g++
-    - export CC=aarch64-linux-gnu-gcc
+    - rm -rf .cargo
    - mkdir -p .cargo
    - echo "[target.aarch64-unknown-linux-gnu]" >> .cargo/config
    - echo "linker= \"aarch64-linux-gnu-gcc\"" >> .cargo/config
    - cat .cargo/config
    - cargo build --target aarch64-unknown-linux-gnu --release --verbose
    - aarch64-linux-gnu-strip target/aarch64-unknown-linux-gnu/release/parity
+    - md5sum target/aarch64-unknown-linux-gnu/release/parity >> checksum
+    - aws configure set aws_access_key_id $s3_key 
+    - aws configure set aws_secret_access_key $s3_secret
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/parity --body target/aarch64-unknown-linux-gnu/release/parity
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/checksum --body checksum
  tags:
    - rust
    - rust-arm
  artifacts:
    paths:
    - target/aarch64-unknown-linux-gnu/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    name: "aarch64-unknown-linux-gnu_parity"
+  allow_failure: true
 darwin:
  stage: build
+  only:
+    - master
+    - beta
+    - tags
+    - stable
  script:
    - cargo build --release --verbose
+    - md5sum target/release/parity >> checksum
+    - aws configure set aws_access_key_id $s3_key 
+    - aws configure set aws_secret_access_key $s3_secret
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-apple-darwin/parity --body target/release/parity
+    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-apple-darwin/checksum --body checksum
  tags:
    - osx
  artifacts:
    paths:
    - target/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    name: "x86_64-apple-darwin_parity"
 windows:
  stage: build
+  only:
+    - master
+    - beta
+    - tags
+    - stable
  script:
    - set INCLUDE=C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A\Include;C:\vs2015\VC\include;C:\Program Files (x86)\Windows Kits\10\Include\10.0.10240.0\ucrt
    - set LIB=C:\vs2015\VC\lib;C:\Program Files (x86)\Windows Kits\10\Lib\10.0.10240.0\ucrt\x64
    - set RUST_BACKTRACE=1
-    - SET
-    - rustup default stable-x86_64-pc-windows-msvc
+    - rustup default 1.11.0-x86_64-pc-windows-msvc
    - cargo build --release --verbose
+    - md5sum target\release\parity >> checksum
+    - aws configure set aws_access_key_id %s3_key%
+    - aws configure set aws_secret_access_key %s3_secret%
+    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity --body target\release\parity.exe
+    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity --body target\release\parity.pdb
+    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/checksum --body checksum
  tags:
   - rust-windows
  artifacts:
    paths:
    - target/release/parity.exe
    - target/release/parity.pdb
-    name: "${CI_BUILD_NAME}_parity"
+    name: "x86_64-pc-windows-msvc_parity"
+test-linux:
+  stage: test
+  before_script:
+    - git submodule update --init --recursive
+  script:
+    - export RUST_BACKTRACE=1
+    - ./test.sh --verbose
+  tags:
+    - rust-test
+  dependencies:
+    - linux-stable
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,6 +1,6 @@
 [root]
 name = "parity"
-version = "1.3.0"
+version = "1.3.3"
 dependencies = [
 "ansi_term 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "clippy 0.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -20,7 +20,7 @@ dependencies = [
 "ethcore-logger 1.3.0",
 "ethcore-rpc 1.3.0",
 "ethcore-signer 1.3.0",
- "ethcore-util 1.3.0",
+ "ethcore-util 1.3.3",
 "ethsync 1.3.0",
 "fdlimit 0.1.0",
 "hyper 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -112,9 +112,18 @@ name = "bloomchain"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"

+[[package]]
+name = "bloomfilter"
+version = "0.0.10"
+source = "git+https://github.com/ethcore/rust-bloom-filter#e66a3f20443bc78810877390ad4da00ebdf74d78"
+dependencies = [
+ "bit-vec 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "byteorder"
-version = "0.5.2"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"

 [[package]]
@@ -122,6 +131,14 @@ name = "bytes"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"

+[[package]]
+name = "bytes"
+version = "0.4.0-dev"
+source = "git+https://github.com/carllerche/bytes#6529f6392a9717585b8d67e1db96e6fa0fb6cb1f"
+dependencies = [
+ "stable-heap 0.1.0 (git+https://github.com/carllerche/stable-heap?rev=3c5cd1ca47)",
+]
+
 [[package]]
 name = "cfg-if"
 version = "0.1.0"
@@ -155,7 +172,7 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

 [[package]]
@@ -241,6 +258,8 @@ version = "1.3.0"
 dependencies = [
 "bit-set 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "bloomchain 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bloomfilter 0.0.10 (git+https://github.com/ethcore/rust-bloom-filter)",
+ "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "clippy 0.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
 "crossbeam 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -250,16 +269,18 @@ dependencies = [
 "ethcore-ipc 1.3.0",
 "ethcore-ipc-codegen 1.3.0",
 "ethcore-ipc-nano 1.3.0",
- "ethcore-util 1.3.0",
+ "ethcore-util 1.3.3",
 "ethjson 0.1.0",
 "ethstore 0.1.0",
+ "evmjit 1.3.0",
 "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 "hyper 0.9.4 (git+https://github.com/ethcore/hyper)",
 "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lru-cache 0.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
 "num_cpus 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
 "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
 "semver 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -272,23 +293,23 @@ version = "1.3.0"
 dependencies = [
 "clippy 0.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
 "ethcore-rpc 1.3.0",
- "ethcore-util 1.3.0",
+ "ethcore-util 1.3.3",
 "hyper 0.9.4 (git+https://github.com/ethcore/hyper)",
- "jsonrpc-core 2.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "jsonrpc-http-server 6.1.0 (git+https://github.com/ethcore/jsonrpc-http-server.git)",
 "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 "mime_guess 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "parity-dapps 0.6.0 (git+https://github.com/ethcore/parity-ui.git)",
- "parity-dapps-home 0.6.0 (git+https://github.com/ethcore/parity-ui.git)",
- "parity-dapps-status 0.6.0 (git+https://github.com/ethcore/parity-ui.git)",
- "parity-dapps-wallet 0.6.0 (git+https://github.com/ethcore/parity-ui.git)",
+ "parity-dapps 1.4.0 (git+https://github.com/ethcore/parity-ui.git)",
+ "parity-dapps-home 1.4.0 (git+https://github.com/ethcore/parity-ui.git)",
+ "parity-dapps-status 1.4.0 (git+https://github.com/ethcore/parity-ui.git)",
+ "parity-dapps-wallet 1.4.0 (git+https://github.com/ethcore/parity-ui.git)",
 "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde 0.7.9 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_codegen 0.7.9 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_json 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "syntex 0.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

 [[package]]
@@ -314,7 +335,7 @@ name = "ethcore-ipc"
 version = "1.3.0"
 dependencies = [
 "ethcore-devtools 1.3.0",
- "ethcore-util 1.3.0",
+ "ethcore-util 1.3.3",
 "nanomsg 0.5.1 (git+https://github.com/ethcore/nanomsg.rs.git)",
 "semver 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -359,7 +380,7 @@ dependencies = [
 "ethcore-ipc 1.3.0",
 "ethcore-ipc-codegen 1.3.0",
 "ethcore-ipc-nano 1.3.0",
- "ethcore-util 1.3.0",
+ "ethcore-util 1.3.3",
 "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 "nanomsg 0.5.1 (git+https://github.com/ethcore/nanomsg.rs.git)",
 "semver 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -371,7 +392,7 @@ name = "ethcore-logger"
 version = "1.3.0"
 dependencies = [
 "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "ethcore-util 1.3.0",
+ "ethcore-util 1.3.3",
 "isatty 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -386,7 +407,7 @@ dependencies = [
 "ansi_term 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "ethcore-devtools 1.3.0",
 "ethcore-io 1.3.0",
- "ethcore-util 1.3.0",
+ "ethcore-util 1.3.3",
 "igd 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -410,11 +431,11 @@ dependencies = [
 "ethcore-devtools 1.3.0",
 "ethcore-io 1.3.0",
 "ethcore-ipc 1.3.0",
- "ethcore-util 1.3.0",
+ "ethcore-util 1.3.3",
 "ethjson 0.1.0",
 "ethsync 1.3.0",
 "json-ipc-server 0.2.4 (git+https://github.com/ethcore/json-ipc-server.git)",
- "jsonrpc-core 2.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "jsonrpc-http-server 6.1.0 (git+https://github.com/ethcore/jsonrpc-http-server.git)",
 "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -433,18 +454,18 @@ dependencies = [
 "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "ethcore-io 1.3.0",
 "ethcore-rpc 1.3.0",
- "ethcore-util 1.3.0",
- "jsonrpc-core 2.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ethcore-util 1.3.3",
+ "jsonrpc-core 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "parity-dapps-signer 0.6.0 (git+https://github.com/ethcore/parity-ui.git)",
+ "parity-dapps-signer 1.4.0 (git+https://github.com/ethcore/parity-ui.git)",
 "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "ws 0.5.0 (git+https://github.com/ethcore/ws-rs.git?branch=stable)",
+ "ws 0.5.2 (git+https://github.com/ethcore/ws-rs.git?branch=mio-upstream-stable)",
 ]

 [[package]]
 name = "ethcore-util"
-version = "1.3.0"
+version = "1.3.3"
 dependencies = [
 "ansi_term 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "arrayvec 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -477,7 +498,7 @@ dependencies = [
 name = "ethjson"
 version = "0.1.0"
 dependencies = [
- "ethcore-util 1.3.0",
+ "ethcore-util 1.3.3",
 "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde 0.7.9 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_codegen 0.7.9 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -525,7 +546,7 @@ dependencies = [
 "ethcore-ipc-codegen 1.3.0",
 "ethcore-ipc-nano 1.3.0",
 "ethcore-network 1.3.0",
- "ethcore-util 1.3.0",
+ "ethcore-util 1.3.3",
 "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 "parking_lot 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -534,6 +555,13 @@ dependencies = [
 "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

+[[package]]
+name = "evmjit"
+version = "1.3.0"
+dependencies = [
+ "tiny-keccak 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "fdlimit"
 version = "0.1.0"
@@ -614,7 +642,7 @@ dependencies = [
 "traitobject 0.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "typeable 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "vecio 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

@@ -635,7 +663,7 @@ dependencies = [
 "traitobject 0.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "typeable 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

 [[package]]
@@ -682,23 +710,23 @@ source = "git+https://github.com/ethcore/json-ipc-server.git#56b6307130710ebc73c
 dependencies = [
 "bytes 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-core 2.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 "mio 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "miow 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "miow 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "slab 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

 [[package]]
 name = "jsonrpc-core"
-version = "2.0.7"
+version = "2.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde 0.7.9 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_codegen 0.7.9 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_json 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "syntex 0.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

 [[package]]
@@ -707,7 +735,7 @@ version = "6.1.0"
 source = "git+https://github.com/ethcore/jsonrpc-http-server.git#4e3f93eb79125e91a46e04d77c25ff8885498b86"
 dependencies = [
 "hyper 0.9.4 (git+https://github.com/ethcore/hyper)",
- "jsonrpc-core 2.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

@@ -735,11 +763,24 @@ name = "libc"
 version = "0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"

+[[package]]
+name = "linked-hash-map"
+version = "0.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "log"
 version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"

+[[package]]
+name = "lru-cache"
+version = "0.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "linked-hash-map 0.0.9 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "matches"
 version = "0.1.2"
@@ -780,7 +821,7 @@ dependencies = [
 "bytes 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "miow 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "miow 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "net2 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
 "nix 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "slab 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -796,7 +837,7 @@ dependencies = [
 "bytes 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "miow 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "miow 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "net2 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
 "nix 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "slab 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -804,9 +845,24 @@ dependencies = [
 "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

+[[package]]
+name = "mio"
+version = "0.6.0-dev"
+source = "git+https://github.com/carllerche/mio?rev=62ec763c9cc34d8a452ed0392c575c50ddd5fc8d#62ec763c9cc34d8a452ed0392c575c50ddd5fc8d"
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "miow 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "net2 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nix 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "slab 0.2.0 (git+https://github.com/carllerche/slab?rev=5476efcafb)",
+ "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "miow"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -854,6 +910,19 @@ dependencies = [
 "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

+[[package]]
+name = "nix"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "semver 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "nodrop"
 version = "0.1.6"
@@ -956,8 +1025,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"

 [[package]]
 name = "parity-dapps"
-version = "0.6.0"
-source = "git+https://github.com/ethcore/parity-ui.git#697e860dedc45003909602a002e7743478ab173a"
+version = "1.4.0"
+source = "git+https://github.com/ethcore/parity-ui.git#e4dddf36e7c9fa5c6e746790119c71f67438784a"
 dependencies = [
 "aster 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -970,34 +1039,34 @@ dependencies = [

 [[package]]
 name = "parity-dapps-home"
-version = "0.6.0"
-source = "git+https://github.com/ethcore/parity-ui.git#697e860dedc45003909602a002e7743478ab173a"
+version = "1.4.0"
+source = "git+https://github.com/ethcore/parity-ui.git#e4dddf36e7c9fa5c6e746790119c71f67438784a"
 dependencies = [
- "parity-dapps 0.6.0 (git+https://github.com/ethcore/parity-ui.git)",
+ "parity-dapps 1.4.0 (git+https://github.com/ethcore/parity-ui.git)",
 ]

 [[package]]
 name = "parity-dapps-signer"
-version = "0.6.0"
-source = "git+https://github.com/ethcore/parity-ui.git#697e860dedc45003909602a002e7743478ab173a"
+version = "1.4.0"
+source = "git+https://github.com/ethcore/parity-ui.git#e4dddf36e7c9fa5c6e746790119c71f67438784a"
 dependencies = [
- "parity-dapps 0.6.0 (git+https://github.com/ethcore/parity-ui.git)",
+ "parity-dapps 1.4.0 (git+https://github.com/ethcore/parity-ui.git)",
 ]

 [[package]]
 name = "parity-dapps-status"
-version = "0.6.0"
-source = "git+https://github.com/ethcore/parity-ui.git#697e860dedc45003909602a002e7743478ab173a"
+version = "1.4.0"
+source = "git+https://github.com/ethcore/parity-ui.git#e4dddf36e7c9fa5c6e746790119c71f67438784a"
 dependencies = [
- "parity-dapps 0.6.0 (git+https://github.com/ethcore/parity-ui.git)",
+ "parity-dapps 1.4.0 (git+https://github.com/ethcore/parity-ui.git)",
 ]

 [[package]]
 name = "parity-dapps-wallet"
-version = "0.6.0"
-source = "git+https://github.com/ethcore/parity-ui.git#697e860dedc45003909602a002e7743478ab173a"
+version = "1.4.0"
+source = "git+https://github.com/ethcore/parity-ui.git#e4dddf36e7c9fa5c6e746790119c71f67438784a"
 dependencies = [
- "parity-dapps 0.6.0 (git+https://github.com/ethcore/parity-ui.git)",
+ "parity-dapps 1.4.0 (git+https://github.com/ethcore/parity-ui.git)",
 ]

 [[package]]
@@ -1124,7 +1193,7 @@ dependencies = [

 [[package]]
 name = "rayon"
-version = "0.3.1"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "deque 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1152,7 +1221,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "rocksdb"
 version = "0.4.5"
-source = "git+https://github.com/ethcore/rust-rocksdb#eadce7f74cfe92b99ce63a77af425b47857239b8"
+source = "git+https://github.com/ethcore/rust-rocksdb#485dd747a2c9a9f910fc8ac696fc9edf5fa22aa3"
 dependencies = [
 "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
 "rocksdb-sys 0.3.0 (git+https://github.com/ethcore/rust-rocksdb)",
@@ -1161,7 +1230,7 @@ dependencies = [
 [[package]]
 name = "rocksdb-sys"
 version = "0.3.0"
-source = "git+https://github.com/ethcore/rust-rocksdb#eadce7f74cfe92b99ce63a77af425b47857239b8"
+source = "git+https://github.com/ethcore/rust-rocksdb#485dd747a2c9a9f910fc8ac696fc9edf5fa22aa3"
 dependencies = [
 "gcc 0.3.28 (registry+https://github.com/rust-lang/crates.io-index)",
 "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1255,11 +1324,8 @@ dependencies = [

 [[package]]
 name = "sha1"
-version = "0.1.1"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "byteorder 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]

 [[package]]
 name = "sha3"
@@ -1273,6 +1339,11 @@ name = "slab"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"

+[[package]]
+name = "slab"
+version = "0.2.0"
+source = "git+https://github.com/carllerche/slab?rev=5476efcafb#5476efcafbc5ef4d7315b1bea3f756d8a1fe975e"
+
 [[package]]
 name = "slab"
 version = "0.2.0"
@@ -1297,6 +1368,11 @@ name = "spmc"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"

+[[package]]
+name = "stable-heap"
+version = "0.1.0"
+source = "git+https://github.com/carllerche/stable-heap?rev=3c5cd1ca47#3c5cd1ca4706f167a1de85658b5af0d6d3e65165"
+
 [[package]]
 name = "strsim"
 version = "0.3.0"
@@ -1447,7 +1523,7 @@ dependencies = [

 [[package]]
 name = "url"
-version = "1.1.1"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "idna 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1506,15 +1582,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"

 [[package]]
 name = "ws"
-version = "0.5.0"
-source = "git+https://github.com/ethcore/ws-rs.git?branch=stable#a876fc115c3ef50a17c8822c9bd2f6e94473e005"
+version = "0.5.2"
+source = "git+https://github.com/ethcore/ws-rs.git?branch=mio-upstream-stable#afbff59776ce16ccec5ee9e218b8891830ee6fdf"
 dependencies = [
+ "bytes 0.4.0-dev (git+https://github.com/carllerche/bytes)",
 "httparse 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.5.1 (git+https://github.com/ethcore/mio?branch=v0.5.x)",
+ "mio 0.6.0-dev (git+https://github.com/carllerche/mio?rev=62ec763c9cc34d8a452ed0392c575c50ddd5fc8d)",
 "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "sha1 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sha1 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "slab 0.2.0 (git+https://github.com/carllerche/slab?rev=5476efcafb)",
+ "url 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

 [[package]]
@@ -1549,16 +1627,15 @@ dependencies = [
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 "checksum bit-set 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d9bf6104718e80d7b26a68fdbacff3481cfc05df670821affc7e9cbc1884400c"
 "checksum bit-vec 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "5b97c2c8e8bbb4251754f559df8af22fb264853c7d009084a576cdf12565089d"
-"checksum bitflags 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "32866f4d103c4e438b1db1158aa1b1a80ee078e5d77a59a2f906fd62a577389c"
 "checksum bitflags 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8dead7461c1127cf637931a1e50934eb6eee8bff2f74433ac7909e9afcee04a3"
 "checksum bitflags 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4f67931368edf3a9a51d29886d245f1c3db2f1ef0dcc9e35ff70341b78c10d23"
-"checksum bitflags 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "72cd7314bd4ee024071241147222c706e80385a1605ac7d4cd2fcc339da2ae46"
 "checksum blastfig 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "09640e0509d97d5cdff03a9f5daf087a8e04c735c3b113a75139634a19cfc7b2"
 "checksum bloomchain 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3f421095d2a76fc24cd3fb3f912b90df06be7689912b1bdb423caefae59c258d"
-"checksum byteorder 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "3e68d0b3b234a583993a53d5b0063fb5fe8713590fe733d41b98a2cee6a9c26e"
+"checksum bloomfilter 0.0.10 (git+https://github.com/ethcore/rust-bloom-filter)" = "<none>"
+"checksum byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "0fc10e8cc6b2580fda3f36eb6dc5316657f812a3df879a44a66fc9f0fdbc4855"
 "checksum bytes 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c129aff112dcc562970abb69e2508b40850dd24c274761bb50fb8a0067ba6c27"
+"checksum bytes 0.4.0-dev (git+https://github.com/carllerche/bytes)" = "<none>"
 "checksum cfg-if 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "de1e760d7b6535af4241fca8bd8adf68e2e7edacc6b29f5d399050c5e48cf88c"
-"checksum chrono 0.2.22 (registry+https://github.com/rust-lang/crates.io-index)" = "a714b6792cb4bb07643c35d2a051d92988d4e296322a60825549dd0764bcd396"
 "checksum clippy 0.0.80 (registry+https://github.com/rust-lang/crates.io-index)" = "e96469b413984c78285727f94f9c626a1f2006cecdcf813b5d6893c0c85df42f"
 "checksum clippy_lints 0.0.80 (registry+https://github.com/rust-lang/crates.io-index)" = "f11938c4b10c556903bb1c1e717eb038658324bf7197e4cfc159a16417327345"
 "checksum cookie 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "90266f45846f14a1e986c77d1e9c2626b8c342ed806fe60241ec38cc8697b245"
@@ -1577,30 +1654,35 @@ dependencies = [
 "checksum hpack 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3d2da7d3a34cf6406d9d700111b8eafafe9a251de41ae71d8052748259343b58"
 "checksum httparse 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "46534074dbb80b070d60a5cb8ecadd8963a00a438ae1a95268850a7ef73b67ae"
 "checksum hyper 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "bb0f4d00bb781e559b6e66ae4b5479df0fdf9ab15949f52fa2f1f5de16d4cc07"
+"checksum hyper 0.9.10 (registry+https://github.com/rust-lang/crates.io-index)" = "eb27e8a3e8f17ac43ffa41bbda9cf5ad3f9f13ef66fa4873409d4902310275f7"
 "checksum hyper 0.9.4 (git+https://github.com/ethcore/hyper)" = "<none>"
 "checksum idna 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1053236e00ce4f668aeca4a769a09b3bf5a682d802abd6f3cb39374f6b162c11"
-"checksum igd 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8f5b93df68d6152576e9bc9f371e33e00b40738d528b3566ff41ea11d04401dc"
+"checksum igd 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c8c12b1795b8b168f577c45fa10379b3814dcb11b7ab702406001f0d63f40484"
 "checksum isatty 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7408a548dc0e406b7912d9f84c261cc533c1866e047644a811c133c56041ac0c"
 "checksum itertools 0.4.13 (registry+https://github.com/rust-lang/crates.io-index)" = "086e1fa5fe48840b1cfdef3a20c7e3115599f8d5c4c87ef32a794a7cdd184d76"
 "checksum json-ipc-server 0.2.4 (git+https://github.com/ethcore/json-ipc-server.git)" = "<none>"
-"checksum jsonrpc-core 2.0.7 (registry+https://github.com/rust-lang/crates.io-index)" = "91755680900913f73576065c85359ee793ac3883bc461dbca90fc4a603be84cc"
+"checksum jsonrpc-core 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ec4477e4e8218da23caa5dd31f4eb39999aa0ea9035660617eccfb19a23bf5ad"
 "checksum jsonrpc-http-server 6.1.0 (git+https://github.com/ethcore/jsonrpc-http-server.git)" = "<none>"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
 "checksum language-tags 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a91d884b6667cd606bb5a69aa0c99ba811a115fc68915e7056ec08a46e93199a"
 "checksum lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "49247ec2a285bb3dcb23cbd9c35193c025e7251bfce77c1d5da97e6362dffe7f"
 "checksum libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)" = "97def9dc7ce1d8e153e693e3a33020bc69972181adb2f871e87e888876feae49"
+"checksum linked-hash-map 0.0.9 (registry+https://github.com/rust-lang/crates.io-index)" = "83f7ff3baae999fdf921cccf54b61842bb3b26868d50d02dff48052ebec8dd79"
 "checksum log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "ab83497bf8bf4ed2a74259c1c802351fcd67a65baa86394b6ba73c36f4838054"
+"checksum lru-cache 0.0.7 (registry+https://github.com/rust-lang/crates.io-index)" = "42d50dcb5d9f145df83b1043207e1ac0c37c9c779c4e128ca4655abc3f3cbf8c"
 "checksum matches 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "15305656809ce5a4805b1ff2946892810992197ce1270ff79baded852187942e"
 "checksum memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d8b629fb514376c675b98c1421e80b151d3817ac42d7c667717d282761418d20"
 "checksum mime 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a74cc2587bf97c49f3f5bab62860d6abf3902ca73b66b51d9b049fbdcd727bd2"
 "checksum mime_guess 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5e50bf542f81754ef69e5cea856946a3819f7c09ea97b4903c8bc8a89f74e7b6"
 "checksum mio 0.5.1 (git+https://github.com/ethcore/mio?branch=v0.5.x)" = "<none>"
 "checksum mio 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a637d1ca14eacae06296a008fa7ad955347e34efcb5891cfd8ba05491a37907e"
-"checksum miow 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4e93d633d34b8ff65a24566d67d49703e7a5c7ac2844d6139a9fc441a799e89a"
+"checksum mio 0.6.0-dev (git+https://github.com/carllerche/mio?rev=62ec763c9cc34d8a452ed0392c575c50ddd5fc8d)" = "<none>"
+"checksum miow 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "d5bfc6782530ac8ace97af10a540054a37126b63b0702ddaaa243b73b5745b9a"
 "checksum nanomsg 0.5.1 (git+https://github.com/ethcore/nanomsg.rs.git)" = "<none>"
 "checksum nanomsg-sys 0.5.0 (git+https://github.com/ethcore/nanomsg.rs.git)" = "<none>"
 "checksum net2 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)" = "6a816012ca11cb47009693c1e0c6130e26d39e4d97ee2a13c50e868ec83e3204"
 "checksum nix 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f05c2fc965fc1cd6b73fa57fa7b89f288178737f2f3ce9e63e4a6a141189000e"
+"checksum nix 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a7bb1da2be7da3cbffda73fc681d509ffd9e665af478d2bee1907cee0bc64b2"
 "checksum nodrop 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "4d9a22dbcebdeef7bf275cbf444d6521d4e7a2fee187b72d80dba0817120dd8f"
 "checksum nom 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6caab12c5f97aa316cb249725aa32115118e1522b445e26c257dd77cad5ffd4e"
 "checksum num 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)" = "c04bd954dbf96f76bab6e5bd6cef6f1ce1262d15268ce4f926d2b5b778fa7af2"
@@ -1613,11 +1695,11 @@ dependencies = [
 "checksum num_cpus 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "51fedae97a05f7353612fe017ab705a37e6db8f4d67c5c6fe739a9e70d6eed09"
 "checksum number_prefix 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "084d05f4bf60621a9ac9bde941a410df548f4de9545f06e5ee9d3aef4b97cd77"
 "checksum odds 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)" = "b28c06e81b0f789122d415d6394b5fe849bde8067469f4c2980d3cdc10c78ec1"
-"checksum parity-dapps 0.6.0 (git+https://github.com/ethcore/parity-ui.git)" = "<none>"
-"checksum parity-dapps-home 0.6.0 (git+https://github.com/ethcore/parity-ui.git)" = "<none>"
-"checksum parity-dapps-signer 0.6.0 (git+https://github.com/ethcore/parity-ui.git)" = "<none>"
-"checksum parity-dapps-status 0.6.0 (git+https://github.com/ethcore/parity-ui.git)" = "<none>"
-"checksum parity-dapps-wallet 0.6.0 (git+https://github.com/ethcore/parity-ui.git)" = "<none>"
+"checksum parity-dapps 1.4.0 (git+https://github.com/ethcore/parity-ui.git)" = "<none>"
+"checksum parity-dapps-home 1.4.0 (git+https://github.com/ethcore/parity-ui.git)" = "<none>"
+"checksum parity-dapps-signer 1.4.0 (git+https://github.com/ethcore/parity-ui.git)" = "<none>"
+"checksum parity-dapps-status 1.4.0 (git+https://github.com/ethcore/parity-ui.git)" = "<none>"
+"checksum parity-dapps-wallet 1.4.0 (git+https://github.com/ethcore/parity-ui.git)" = "<none>"
 "checksum parking_lot 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "e0fd1be2c3cf5fef20a6d18fec252c4f3c87c14fc3039002eb7d4ed91e436826"
 "checksum phf 0.7.14 (registry+https://github.com/rust-lang/crates.io-index)" = "447d9d45f2e0b4a9b532e808365abf18fc211be6ca217202fcd45236ef12f026"
 "checksum phf_codegen 0.7.14 (registry+https://github.com/rust-lang/crates.io-index)" = "8af7ae7c3f75a502292b491e5cc0a1f69e3407744abe6e57e2a3b712bb82f01d"
@@ -1633,7 +1715,7 @@ dependencies = [
 "checksum quick-error 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0aad603e8d7fb67da22dbdf1f4b826ce8829e406124109e73cf1b2454b93a71c"
 "checksum quine-mc_cluskey 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a6683b0e23d80813b1a535841f0048c1537d3f86d63c999e8373b39a9b0eb74a"
 "checksum rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)" = "2791d88c6defac799c3f20d74f094ca33b9332612d9aef9078519c82e4fe04a5"
-"checksum rayon 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "941deb43a6254b9867fec1e0caeda38a2ad905ab18c57f7c68c396ca68998c07"
+"checksum rayon 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "655df67c314c30fa3055a365eae276eb88aa4f3413a352a1ab32c1320eda41ea"
 "checksum regex 0.1.68 (registry+https://github.com/rust-lang/crates.io-index)" = "b4329b8928a284580a1c63ec9d846b12f6d3472317243ff7077aff11f23f2b29"
 "checksum regex-syntax 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "841591b1e05609a643e3b4d0045fce04f701daba7151ddcd3ad47b080693d5a9"
 "checksum rocksdb 0.4.5 (git+https://github.com/ethcore/rust-rocksdb)" = "<none>"
@@ -1648,12 +1730,14 @@ dependencies = [
 "checksum serde 0.7.9 (registry+https://github.com/rust-lang/crates.io-index)" = "b76133a8a02f1c6ebd3fb9a2ecaab3d54302565a51320e80931adba571aadb1b"
 "checksum serde_codegen 0.7.9 (registry+https://github.com/rust-lang/crates.io-index)" = "c5b74ff4fb34013cc0b917dd182fefc05ee9af233b9d0d557078334554284d0e"
 "checksum serde_json 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2c88a751caa8f0000058fb971cd443ed2e6b653f33f5a47f29892a8bd44ca4c1"
-"checksum sha1 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a307a40d5834140e4213a6952483b84e9ad53bdcab918b7335a6e305e505a53c"
+"checksum sha1 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "cc30b1e1e8c40c121ca33b86c23308a090d19974ef001b4bf6e61fd1a0fb095c"
 "checksum slab 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "d807fd58c4181bbabed77cb3b891ba9748241a552bcc5be698faaebefc54f46e"
+"checksum slab 0.2.0 (git+https://github.com/carllerche/slab?rev=5476efcafb)" = "<none>"
 "checksum slab 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6dbdd334bd28d328dad1c41b0ea662517883d8880d8533895ef96c8003dec9c4"
 "checksum smallvec 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "fcc8d19212aacecf95e4a7a2179b26f7aeb9732a915cf01f05b0d3e044865410"
 "checksum solicit 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "172382bac9424588d7840732b250faeeef88942e37b6e35317dce98cafdd75b2"
 "checksum spmc 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "93bdab61c1a413e591c4d17388ffa859eaff2df27f1e13a5ec8b716700605adf"
+"checksum stable-heap 0.1.0 (git+https://github.com/carllerche/stable-heap?rev=3c5cd1ca47)" = "<none>"
 "checksum strsim 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e4d73a2c36a4d095ed1a6df5cbeac159863173447f7a82b3f4757426844ab825"
 "checksum syntex 0.33.0 (registry+https://github.com/rust-lang/crates.io-index)" = "393b6dd0889df2b064beeea954cfda6bc2571604ac460deeae0fed55a53988af"
 "checksum syntex_syntax 0.33.0 (registry+https://github.com/rust-lang/crates.io-index)" = "44bded3cabafc65c90b663b1071bd2d198a9ab7515e6ce729e4570aaf53c407e"
@@ -1673,7 +1757,7 @@ dependencies = [
 "checksum unicode-normalization 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "26643a2f83bac55f1976fb716c10234485f9202dcd65cfbdf9da49867b271172"
 "checksum unicode-xid 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "36dff09cafb4ec7c8cf0023eb0b686cb6ce65499116a12201c9e11840ca01beb"
 "checksum url 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)" = "f6d04073d0fcd045a1cf57aea560d1be5ba812d8f28814e1e1cf0e90ff4d2f03"
-"checksum url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8ab4ca6f0107350f41a59a51cb0e71a04d905bc6a29181d2cb42fa4f040c65c9"
+"checksum url 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "afe9ec54bc4db14bc8744b7fed060d785ac756791450959b2248443319d5b119"
 "checksum utf8-ranges 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a1ca13c08c41c9c3e04224ed9ff80461d97e121589ff27c753a16cb10830ae0f"
 "checksum uuid 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9767696a9e1bc7a73f2d5f8e0f5428b076cecd9199c200c0364aa0b2d57b8dfa"
 "checksum vecio 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0795a11576d29ae80525a3fda315bf7b534f8feb9d34101e5fe63fb95bb2fd24"
@@ -1681,8 +1765,7 @@ dependencies = [
 "checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 "checksum winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "4dfaaa8fbdaa618fa6914b59b2769d690dd7521920a18d84b42d254678dd5fd4"
 "checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
-"checksum ws 0.5.0 (git+https://github.com/ethcore/ws-rs.git?branch=stable)" = "<none>"
+"checksum ws 0.5.2 (git+https://github.com/ethcore/ws-rs.git?branch=mio-upstream-stable)" = "<none>"
 "checksum ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
-"checksum xml-rs 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)" = "4bac8fd82b24db2dd3b54aa7b29f336d8b5ca1830065ce3aada71bce6f661519"
-"checksum xml-rs 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f11ef7864e55d06a38755beaf03ab70139a04e619acfe94ef800b11bd79eb52c"
+"checksum xml-rs 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "65e74b96bd3179209dc70a980da6df843dff09e46eee103a0376c0949257e3ef"
 "checksum xmltree 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "472a9d37c7c53ab2391161df5b89b1f3bf76dab6ab150d7941ecbdd832282082"
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 description = "Ethcore client."
 name = "parity"
-version = "1.3.0"
+version = "1.3.3"
 license = "GPL-3.0"
 authors = ["Ethcore <admin@ethcore.io>"]
 build = "build.rs"
@@ -59,6 +59,7 @@ ui = ["dapps", "ethcore-signer/ui"]
 use-precompiled-js = ["ethcore-dapps/use-precompiled-js", "ethcore-signer/use-precompiled-js"]
 dapps = ["ethcore-dapps"]
 ipc = ["ethcore/ipc"]
+jit = ["ethcore/jit"]
 dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethsync/dev", "ethcore-rpc/dev", "ethcore-dapps/dev", "ethcore-signer/dev"]
 json-tests = ["ethcore/json-tests"]

@@ -67,6 +68,6 @@ path = "parity/main.rs"
 name = "parity"

 [profile.release]
-debug = true
+debug = false
 lto = false

--- a/dapps/Cargo.toml
+++ b/dapps/Cargo.toml
@@ -10,7 +10,7 @@ build = "build.rs"

 [dependencies]
 log = "0.3"
-jsonrpc-core = "2.0"
+jsonrpc-core = "2.1"
 jsonrpc-http-server = { git = "https://github.com/ethcore/jsonrpc-http-server.git" }
 hyper = { default-features = false, git = "https://github.com/ethcore/hyper" }
 unicase = "1.3"
@@ -21,11 +21,11 @@ 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" }
+parity-dapps = { git = "https://github.com/ethcore/parity-ui.git", version = "1.4" }
 # 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 }
+parity-dapps-status = { git = "https://github.com/ethcore/parity-ui.git", version = "1.4" }
+parity-dapps-home = { git = "https://github.com/ethcore/parity-ui.git", version = "1.4" }
+parity-dapps-wallet = { git = "https://github.com/ethcore/parity-ui.git", version = "1.4", optional = true }
 mime_guess = { version = "1.6.1" }
 clippy = { version = "0.0.80", optional = true}

--- a/dapps/src/lib.rs
+++ b/dapps/src/lib.rs
@@ -100,14 +100,26 @@ impl ServerBuilder {

 	/// 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())
+	pub fn start_unsecured_http(&self, addr: &SocketAddr, hosts: Option<Vec<String>>) -> Result<Server, ServerError> {
+		Server::start_http(
+			addr,
+			hosts,
+			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())
+	pub fn start_basic_auth_http(&self, addr: &SocketAddr, hosts: Option<Vec<String>>, username: &str, password: &str) -> Result<Server, ServerError> {
+		Server::start_http(
+			addr,
+			hosts,
+			HttpBasicAuth::single_user(username, password),
+			self.handler.clone(),
+			self.dapps_path.clone(),
+		)
 	}
 }

@@ -118,7 +130,28 @@ pub struct Server {
 }

 impl Server {
-	fn start_http<A: Authorization + 'static>(addr: &SocketAddr, authorization: A, handler: Arc<IoHandler>, dapps_path: String) -> Result<Server, ServerError> {
+	/// Returns a list of allowed hosts or `None` if all hosts are allowed.
+	fn allowed_hosts(hosts: Option<Vec<String>>, bind_address: String) -> Option<Vec<String>> {
+		let mut allowed = Vec::new();
+
+		match hosts {
+			Some(hosts) => allowed.extend_from_slice(&hosts),
+			None => return None,
+		}
+
+		// Add localhost domain as valid too if listening on loopback interface.
+		allowed.push(bind_address.replace("127.0.0.1", "localhost").into());
+		allowed.push(bind_address.into());
+		Some(allowed)
+	}
+
+	fn start_http<A: Authorization + 'static>(
+		addr: &SocketAddr,
+		hosts: Option<Vec<String>>,
+		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));
@@ -129,7 +162,7 @@ impl Server {
 			special.insert(router::SpecialEndpoint::Utils, apps::utils());
 			special
 		});
-		let bind_address = format!("{}", addr);
+		let hosts = Self::allowed_hosts(hosts, format!("{}", addr));

 		try!(hyper::Server::http(addr))
 			.handle(move |_| router::Router::new(
@@ -137,7 +170,7 @@ impl Server {
 				endpoints.clone(),
 				special.clone(),
 				authorization.clone(),
-				bind_address.clone(),
+				hosts.clone(),
 			))
 			.map(|(l, srv)| {

@@ -182,3 +215,24 @@ impl From<hyper::error::Error> for ServerError {
 		}
 	}
 }
+
+#[cfg(test)]
+mod tests {
+	use super::Server;
+
+	#[test]
+	fn should_return_allowed_hosts() {
+		// given
+		let bind_address = "127.0.0.1".to_owned();
+
+		// when
+		let all = Server::allowed_hosts(None, bind_address.clone());
+		let address = Server::allowed_hosts(Some(Vec::new()), bind_address.clone());
+		let some = Server::allowed_hosts(Some(vec!["ethcore.io".into()]), bind_address.clone());
+
+		// then
+		assert_eq!(all, None);
+		assert_eq!(address, Some(vec!["localhost".into(), "127.0.0.1".into()]));
+		assert_eq!(some, Some(vec!["ethcore.io".into(), "localhost".into(), "127.0.0.1".into()]));
+	}
+}
--- a/dapps/src/router/host_validation.rs
+++ b/dapps/src/router/host_validation.rs
@@ -22,14 +22,11 @@ use hyper::net::HttpStream;
 use jsonrpc_http_server::{is_host_header_valid};
 use handlers::ContentHandler;

-
-pub fn is_valid(request: &server::Request<HttpStream>, bind_address: &str, endpoints: Vec<String>) -> bool {
-	let mut endpoints = endpoints.into_iter()
+pub fn is_valid(request: &server::Request<HttpStream>, allowed_hosts: &[String], endpoints: Vec<String>) -> bool {
+	let mut endpoints = endpoints.iter()
 		.map(|endpoint| format!("{}{}", endpoint, DAPPS_DOMAIN))
 		.collect::<Vec<String>>();
-	// Add localhost domain as valid too if listening on loopback interface.
-	endpoints.push(bind_address.replace("127.0.0.1", "localhost").into());
-	endpoints.push(bind_address.into());
+	endpoints.extend_from_slice(allowed_hosts);

 	is_host_header_valid(request, &endpoints)
 }
--- a/dapps/src/router/mod.rs
+++ b/dapps/src/router/mod.rs
@@ -45,7 +45,7 @@ pub struct Router<A: Authorization + 'static> {
 	endpoints: Arc<Endpoints>,
 	special: Arc<HashMap<SpecialEndpoint, Box<Endpoint>>>,
 	authorization: Arc<A>,
-	bind_address: String,
+	allowed_hosts: Option<Vec<String>>,
 	handler: Box<server::Handler<HttpStream> + Send>,
 }

@@ -53,9 +53,11 @@ impl<A: Authorization + 'static> server::Handler<HttpStream> for Router<A> {

 	fn on_request(&mut self, req: server::Request<HttpStream>) -> Next {
 		// Validate Host header
-		if !host_validation::is_valid(&req, &self.bind_address, self.endpoints.keys().cloned().collect()) {
-			self.handler = host_validation::host_invalid_response();
-			return self.handler.on_request(req);
+		if let Some(ref hosts) = self.allowed_hosts {
+			if !host_validation::is_valid(&req, hosts, self.endpoints.keys().cloned().collect()) {
+				self.handler = host_validation::host_invalid_response();
+				return self.handler.on_request(req);
+			}
 		}

 		// Check authorization
@@ -114,7 +116,7 @@ impl<A: Authorization> Router<A> {
 		endpoints: Arc<Endpoints>,
 		special: Arc<HashMap<SpecialEndpoint, Box<Endpoint>>>,
 		authorization: Arc<A>,
-		bind_address: String,
+		allowed_hosts: Option<Vec<String>>,
 		) -> Self {

 		let handler = special.get(&SpecialEndpoint::Rpc).unwrap().to_handler(EndpointPath::default());
@@ -123,7 +125,7 @@ impl<A: Authorization> Router<A> {
 			endpoints: endpoints,
 			special: special,
 			authorization: authorization,
-			bind_address: bind_address,
+			allowed_hosts: allowed_hosts,
 			handler: handler,
 		}
 	}
--- a/docker/ubuntu-aarch64/Dockerfile
+++ b/docker/ubuntu-aarch64/Dockerfile
@@ -23,15 +23,9 @@ 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
+ cargo -V 

 # build parity
 RUN git clone https://github.com/ethcore/parity && \
--- a/docker/ubuntu-arm/Dockerfile
+++ b/docker/ubuntu-arm/Dockerfile
@@ -23,15 +23,9 @@ 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
+ cargo -V

 # build parity
 RUN git clone https://github.com/ethcore/parity && \
--- a/ethcore/Cargo.toml
+++ b/ethcore/Cargo.toml
@@ -20,7 +20,7 @@ num_cpus = "0.2"
 crossbeam = "0.2.9"
 lazy_static = "0.2"
 bloomchain = "0.1"
-rayon = "0.3.1"
+rayon = "0.4"
 semver = "0.2"
 bit-set = "0.4"
 time = "0.1"
@@ -35,6 +35,9 @@ ethcore-ipc = { path = "../ipc/rpc" }
 ethstore = { path = "../ethstore" }
 ethcore-ipc-nano = { path = "../ipc/nano" }
 rand = "0.3"
+lru-cache = "0.0.7"
+bloomfilter = { git = "https://github.com/ethcore/rust-bloom-filter" }
+byteorder = "0.5"

 [dependencies.hyper]
 git = "https://github.com/ethcore/hyper"
--- a/ethcore/res/ethereum/morden.json
+++ b/ethcore/res/ethereum/morden.json
@@ -8,7 +8,7 @@
 				"difficultyBoundDivisor": "0x0800",
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
-				"registrar": "",
+				"registrar": "0x8e4e9b13d4b45cb0befc93c3061b1408f67316b2",
 				"frontierCompatibilityModeLimit": "0x789b0"
 			}
 		}
--- a/ethcore/src/account.rs
+++ b/ethcore/src/account.rs
@@ -16,14 +16,17 @@

 //! Single account in the system.

+use std::collections::hash_map::Entry;
 use util::*;
 use pod_account::*;
 use account_db::*;
+use lru_cache::LruCache;

-use std::cell::{Ref, RefCell};
+use std::cell::{RefCell, Cell};
+
+const STORAGE_CACHE_ITEMS: usize = 4096;

 /// Single account in the system.
-#[derive(Clone)]
 pub struct Account {
 	// Balance of the account.
 	balance: U256,
@@ -31,14 +34,24 @@ pub struct Account {
 	nonce: U256,
 	// Trie-backed storage.
 	storage_root: H256,
-	// Overlay on trie-backed storage - tuple is (<clean>, <value>).
-	storage_overlay: RefCell<HashMap<H256, (Filth, H256)>>,
-	// Code hash of the account. If None, means that it's a contract whose code has not yet been set.
-	code_hash: Option<H256>,
+	// LRU Cache of the trie-backed storage.
+	// This is limited to `STORAGE_CACHE_ITEMS` recent queries
+	storage_cache: RefCell<LruCache<H256, H256>>,
+	// Modified storage. Accumulates changes to storage made in `set_storage`
+	// Takes precedence over `storage_cache`.
+	storage_changes: HashMap<H256, H256>,
+	// Code hash of the account.
+	code_hash: H256,
+	// Size of the accoun code.
+	code_size: Option<u64>,
 	// Code cache of the account.
-	code_cache: Bytes,
-	// Account is new or has been modified
+	code_cache: Arc<Bytes>,
+	// Account is new or has been modified.
 	filth: Filth,
+	// Account code new or has been modified.
+	code_filth: Filth,
+	// Cached address hash.
+	address_hash: Cell<Option<H256>>,
 }

 impl Account {
@@ -49,23 +62,35 @@ impl Account {
 			balance: balance,
 			nonce: nonce,
 			storage_root: SHA3_NULL_RLP,
-			storage_overlay: RefCell::new(storage.into_iter().map(|(k, v)| (k, (Filth::Dirty, v))).collect()),
-			code_hash: Some(code.sha3()),
-			code_cache: code,
+			storage_cache: Self::empty_storage_cache(),
+			storage_changes: storage,
+			code_hash: code.sha3(),
+			code_size: Some(code.len() as u64),
+			code_cache: Arc::new(code),
 			filth: Filth::Dirty,
+			code_filth: Filth::Dirty,
+			address_hash: Cell::new(None),
 		}
 	}

+	fn empty_storage_cache() -> RefCell<LruCache<H256, H256>> {
+		RefCell::new(LruCache::new(STORAGE_CACHE_ITEMS))
+	}
+
 	/// General constructor.
 	pub fn from_pod(pod: PodAccount) -> Account {
 		Account {
 			balance: pod.balance,
 			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: 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()),
+			storage_cache: Self::empty_storage_cache(),
+			storage_changes: pod.storage.into_iter().collect(),
+			code_hash: pod.code.as_ref().map_or(SHA3_EMPTY, |c| c.sha3()),
+			code_filth: Filth::Dirty,
+			code_size: Some(pod.code.as_ref().map_or(0, |c| c.len() as u64)),
+			code_cache: Arc::new(pod.code.map_or_else(|| { warn!("POD account with unknown code is being created! Assuming no code."); vec![] }, |c| c)),
 			filth: Filth::Dirty,
+			address_hash: Cell::new(None),
 		}
 	}

@@ -75,10 +100,14 @@ impl Account {
 			balance: balance,
 			nonce: nonce,
 			storage_root: SHA3_NULL_RLP,
-			storage_overlay: RefCell::new(HashMap::new()),
-			code_hash: Some(SHA3_EMPTY),
-			code_cache: vec![],
+			storage_cache: Self::empty_storage_cache(),
+			storage_changes: HashMap::new(),
+			code_hash: SHA3_EMPTY,
+			code_cache: Arc::new(vec![]),
+			code_size: Some(0),
 			filth: Filth::Dirty,
+			code_filth: Filth::Clean,
+			address_hash: Cell::new(None),
 		}
 	}

@@ -89,10 +118,14 @@ impl Account {
 			nonce: r.val_at(0),
 			balance: r.val_at(1),
 			storage_root: r.val_at(2),
-			storage_overlay: RefCell::new(HashMap::new()),
-			code_hash: Some(r.val_at(3)),
-			code_cache: vec![],
+			storage_cache: Self::empty_storage_cache(),
+			storage_changes: HashMap::new(),
+			code_hash: r.val_at(3),
+			code_cache: Arc::new(vec![]),
+			code_size: None,
 			filth: Filth::Clean,
+			code_filth: Filth::Clean,
+			address_hash: Cell::new(None),
 		}
 	}

@@ -103,47 +136,77 @@ impl Account {
 			balance: balance,
 			nonce: nonce,
 			storage_root: SHA3_NULL_RLP,
-			storage_overlay: RefCell::new(HashMap::new()),
-			code_hash: None,
-			code_cache: vec![],
+			storage_cache: Self::empty_storage_cache(),
+			storage_changes: HashMap::new(),
+			code_hash: SHA3_EMPTY,
+			code_cache: Arc::new(vec![]),
+			code_size: None,
 			filth: Filth::Dirty,
+			code_filth: Filth::Clean,
+			address_hash: Cell::new(None),
 		}
 	}

 	/// Set this account's code to the given code.
 	/// NOTE: Account should have been created with `new_contract()`
 	pub fn init_code(&mut self, code: Bytes) {
-		assert!(self.code_hash.is_none());
-		self.code_cache = code;
+		self.code_hash = code.sha3();
+		self.code_cache = Arc::new(code);
+		self.code_size = Some(self.code_cache.len() as u64);
 		self.filth = Filth::Dirty;
+		self.code_filth = Filth::Dirty;
 	}

 	/// 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));
-		self.filth = Filth::Dirty;
+		match self.storage_changes.entry(key) {
+			Entry::Occupied(ref mut entry) if entry.get() != &value => {
+				entry.insert(value);
+				self.filth = Filth::Dirty;
+			},
+			Entry::Vacant(entry) => {
+				entry.insert(value);
+				self.filth = Filth::Dirty;
+			},
+			_ => {},
+		}
 	}

 	/// Get (and cache) the contents of the trie's storage at `key`.
+	/// Takes modifed storage into account.
 	pub fn storage_at(&self, db: &AccountDB, key: &H256) -> H256 {
-		self.storage_overlay.borrow_mut().entry(key.clone()).or_insert_with(||{
-			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.");
+		if let Some(value) = self.cached_storage_at(key) {
+			return value;
+		}
+		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.");

-			let item: U256 = match db.get(key){
-				Ok(x) => x.map_or_else(U256::zero, decode),
-				Err(e) => panic!("Encountered potential DB corruption: {}", e),
-			};
-			(Filth::Clean, item.into())
-		}).1.clone()
+		let item: U256 = match db.get(key){
+			Ok(x) => x.map_or_else(U256::zero, decode),
+			Err(e) => panic!("Encountered potential DB corruption: {}", e),
+		};
+		let value: H256 = item.into();
+		self.storage_cache.borrow_mut().insert(key.clone(), value.clone());
+		value
+	}
+
+	/// Get cached storage value if any. Returns `None` if the
+	/// key is not in the cache.
+	pub fn cached_storage_at(&self, key: &H256) -> Option<H256> {
+		if let Some(value) = self.storage_changes.get(key) {
+			return Some(value.clone())
+		}
+		if let Some(value) = self.storage_cache.borrow_mut().get_mut(key) {
+			return Some(value.clone())
+		}
+		None
 	}

 	/// return the balance associated with this account.
@@ -152,48 +215,62 @@ impl Account {
 	/// return the nonce associated with this account.
 	pub fn nonce(&self) -> &U256 { &self.nonce }

-	#[cfg(test)]
 	/// return the code hash associated with this account.
 	pub fn code_hash(&self) -> H256 {
-		self.code_hash.clone().unwrap_or(SHA3_EMPTY)
+		self.code_hash.clone()
+	}
+
+	/// return the code hash associated with this account.
+	pub fn address_hash(&self, address: &Address) -> H256 {
+		let hash = self.address_hash.get();
+		hash.unwrap_or_else(|| {
+			let hash = address.sha3();
+			self.address_hash.set(Some(hash.clone()));
+			hash
+		})
 	}

 	/// returns the account's code. If `None` then the code cache isn't available -
 	/// get someone who knows to call `note_code`.
-	pub fn code(&self) -> Option<&[u8]> {
-		match self.code_hash {
-			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,
+	pub fn code(&self) -> Option<Arc<Bytes>> {
+		if self.code_hash != SHA3_EMPTY && self.code_cache.is_empty() {
+			return None;
 		}
+		Some(self.code_cache.clone())
+	}
+
+	/// returns the account's code size. If `None` then the code cache or code size cache isn't available -
+	/// get someone who knows to call `note_code`.
+	pub fn code_size(&self) -> Option<u64> {
+		self.code_size.clone()
 	}

 	#[cfg(test)]
 	/// Provide a byte array which hashes to the `code_hash`. returns the hash as a result.
 	pub fn note_code(&mut self, code: Bytes) -> Result<(), H256> {
 		let h = code.sha3();
-		match self.code_hash {
-			Some(ref i) if h == *i => {
-				self.code_cache = code;
-				Ok(())
-			},
-			_ => Err(h)
+		if self.code_hash == h {
+			self.code_cache = Arc::new(code);
+			self.code_size = Some(self.code_cache.len() as u64);
+			Ok(())
+		} else {
+			Err(h)
 		}
 	}

 	/// Is `code_cache` valid; such that code is going to return Some?
 	pub fn is_cached(&self) -> bool {
-		!self.code_cache.is_empty() || (self.code_cache.is_empty() && self.code_hash == Some(SHA3_EMPTY))
+		!self.code_cache.is_empty() || (self.code_cache.is_empty() && self.code_hash == SHA3_EMPTY)
 	}

 	/// Is this a new or modified account?
 	pub fn is_dirty(&self) -> bool {
-		self.filth == Filth::Dirty
+		self.filth == Filth::Dirty || self.code_filth == Filth::Dirty || !self.storage_is_clean()
 	}

 	/// Mark account as clean.
 	pub fn set_clean(&mut self) {
+		assert!(self.storage_is_clean());
 		self.filth = Filth::Clean
 	}

@@ -202,28 +279,49 @@ impl Account {
 		// 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.get(h) {
-					Some(x) => { self.code_cache = x.to_vec(); true },
+		match db.get(&self.code_hash) {
+			Some(x) => {
+				self.code_cache = Arc::new(x.to_vec());
+				self.code_size = Some(x.len() as u64);
+				true
+			},
+			_ => {
+				warn!("Failed reverse get of {}", self.code_hash);
+				false
+			},
+		}
+	}
+
+	/// Provide a database to get `code_size`. Should not be called if it is a contract without code.
+	pub fn cache_code_size(&mut self, db: &AccountDB) -> bool {
+		// TODO: fill out self.code_cache;
+		trace!("Account::cache_code_size: ic={}; self.code_hash={:?}, self.code_cache={}", self.is_cached(), self.code_hash, self.code_cache.pretty());
+		self.code_size.is_some() ||
+			if self.code_hash != SHA3_EMPTY {
+				match db.get(&self.code_hash) {
+					Some(x) => {
+						self.code_size = Some(x.len() as u64);
+						true
+					},
 					_ => {
-						warn!("Failed reverse get of {}", h);
+						warn!("Failed reverse get of {}", self.code_hash);
 						false
 					},
-				},
-				_ => false,
+				}
+			} else {
+				false
 			}
 	}

-	#[cfg(test)]
 	/// Determine whether there are any un-`commit()`-ed storage-setting operations.
-	pub fn storage_is_clean(&self) -> bool { self.storage_overlay.borrow().iter().find(|&(_, &(f, _))| f == Filth::Dirty).is_none() }
+	pub fn storage_is_clean(&self) -> bool { self.storage_changes.is_empty() }

 	#[cfg(test)]
 	/// return the storage root associated with this account or None if it has been altered via the overlay.
 	pub fn storage_root(&self) -> Option<&H256> { if self.storage_is_clean() {Some(&self.storage_root)} else {None} }

 	/// return the storage overlay.
-	pub fn storage_overlay(&self) -> Ref<HashMap<H256, (Filth, H256)>> { self.storage_overlay.borrow() }
+	pub fn storage_changes(&self) -> &HashMap<H256, H256> { &self.storage_changes }

 	/// Increment the nonce of the account by one.
 	pub fn inc_nonce(&mut self) {
@@ -233,48 +331,55 @@ impl Account {

 	/// Increment the nonce of the account by one.
 	pub fn add_balance(&mut self, x: &U256) {
-		self.balance = self.balance + *x;
-		self.filth = Filth::Dirty;
+		if !x.is_zero() {
+			self.balance = self.balance + *x;
+			self.filth = Filth::Dirty;
+		}
 	}

 	/// Increment the nonce of the account by one.
 	/// Panics if balance is less than `x`
 	pub fn sub_balance(&mut self, x: &U256) {
-		assert!(self.balance >= *x);
-		self.balance = self.balance - *x;
-		self.filth = Filth::Dirty;
+		if !x.is_zero() {
+			assert!(self.balance >= *x);
+			self.balance = self.balance - *x;
+			self.filth = Filth::Dirty;
+		}
 	}

-	/// Commit the `storage_overlay` to the backing DB and update `storage_root`.
+	/// Commit the `storage_changes` to the backing DB and update `storage_root`.
 	pub fn commit_storage(&mut self, trie_factory: &TrieFactory, db: &mut AccountDBMut) {
 		let mut t = trie_factory.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,
-				// so we can call overloaded `to_bytes` method
-				let res = match v.is_zero() {
-					true => t.remove(k),
-					false => t.insert(k, &encode(&U256::from(v.as_slice()))),
-				};
+		for (k, v) in self.storage_changes.drain() {
+			// cast key and value to trait type,
+			// so we can call overloaded `to_bytes` method
+			let res = match v.is_zero() {
+				true => t.remove(k.as_slice()),
+				false => t.insert(k.as_slice(), &encode(&U256::from(v.as_slice()))),
+			};

-				if let Err(e) = res {
-					warn!("Encountered potential DB corruption: {}", e);
-				}
-				*f = Filth::Clean;
+			if let Err(e) = res {
+				warn!("Encountered potential DB corruption: {}", e);
 			}
+			self.storage_cache.borrow_mut().insert(k, v);
 		}
 	}

 	/// Commit any unsaved code. `code_hash` will always return the hash of the `code_cache` after this.
 	pub fn commit_code(&mut self, db: &mut AccountDBMut) {
-		trace!("Commiting code of {:?} - {:?}, {:?}", self, self.code_hash.is_none(), self.code_cache.is_empty());
-		match (self.code_hash.is_none(), self.code_cache.is_empty()) {
-			(true, true) => self.code_hash = Some(SHA3_EMPTY),
+		trace!("Commiting code of {:?} - {:?}, {:?}", self, self.code_filth == Filth::Dirty, self.code_cache.is_empty());
+		match (self.code_filth == Filth::Dirty, self.code_cache.is_empty()) {
+			(true, true) => {
+				self.code_size = Some(0);
+				self.code_filth = Filth::Clean;
+			},
 			(true, false) => {
-				self.code_hash = Some(db.insert(&self.code_cache));
+				db.emplace(self.code_hash.clone(), (*self.code_cache).clone());
+				self.code_size = Some(self.code_cache.len() as u64);
+				self.code_filth = Filth::Clean;
 			},
 			(false, _) => {},
 		}
@@ -286,9 +391,59 @@ impl Account {
 		stream.append(&self.nonce);
 		stream.append(&self.balance);
 		stream.append(&self.storage_root);
-		stream.append(self.code_hash.as_ref().expect("Cannot form RLP of contract account without code."));
+		stream.append(&self.code_hash);
 		stream.out()
 	}
+
+	/// Clone basic account data
+	pub fn clone_basic(&self) -> Account {
+		Account {
+			balance: self.balance.clone(),
+			nonce: self.nonce.clone(),
+			storage_root: self.storage_root.clone(),
+			storage_cache: Self::empty_storage_cache(),
+			storage_changes: HashMap::new(),
+			code_hash: self.code_hash.clone(),
+			code_size: self.code_size.clone(),
+			code_cache: self.code_cache.clone(),
+			filth: self.filth,
+			code_filth: self.code_filth,
+			address_hash: self.address_hash.clone(),
+		}
+	}
+
+	/// Clone account data and dirty storage keys
+	pub fn clone_dirty(&self) -> Account {
+		let mut account = self.clone_basic();
+		account.storage_changes = self.storage_changes.clone();
+		account.code_cache = self.code_cache.clone();
+		account
+	}
+
+	/// Clone account data, dirty storage keys and cached storage keys.
+	pub fn clone_all(&self) -> Account {
+		let mut account = self.clone_dirty();
+		account.storage_cache = self.storage_cache.clone();
+		account
+	}
+
+	/// Replace self with the data from other account merging storage cache
+	pub fn merge_with(&mut self, other: Account) {
+		assert!(self.storage_is_clean());
+		assert!(other.storage_is_clean());
+		self.balance = other.balance;
+		self.nonce = other.nonce;
+		self.storage_root = other.storage_root;
+		self.code_hash = other.code_hash;
+		self.code_filth = other.code_filth;
+		self.code_cache = other.code_cache;
+		self.code_size = other.code_size;
+		self.address_hash = other.address_hash;
+		let mut cache = self.storage_cache.borrow_mut();
+		for (k, v) in other.storage_cache.into_inner().into_iter() {
+			cache.insert(k.clone() , v.clone()); //TODO: cloning should not be required here
+		}
+	}
 }

 impl fmt::Debug for Account {
@@ -383,7 +538,8 @@ mod tests {
 		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);
+		assert_eq!(a.code_filth, Filth::Dirty);
+		assert_eq!(a.code_size(), Some(3));
 		a.commit_code(&mut db);
 		assert_eq!(a.code_hash().hex(), "af231e631776a517ca23125370d542873eca1fb4d613ed9b5d5335a46ae5b7eb");
 	}
@@ -394,11 +550,12 @@ mod tests {
 		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);
+		assert_eq!(a.code_filth, Filth::Dirty);
 		a.commit_code(&mut db);
+		assert_eq!(a.code_filth, Filth::Clean);
 		assert_eq!(a.code_hash().hex(), "af231e631776a517ca23125370d542873eca1fb4d613ed9b5d5335a46ae5b7eb");
 		a.reset_code(vec![0x55]);
-		assert_eq!(a.code_hash(), SHA3_EMPTY);
+		assert_eq!(a.code_filth, Filth::Dirty);
 		a.commit_code(&mut db);
 		assert_eq!(a.code_hash().hex(), "37bf2238b11b68cdc8382cece82651b59d3c3988873b6e0f33d79694aa45f1be");
 	}
--- a/ethcore/src/action_params.rs
+++ b/ethcore/src/action_params.rs
@@ -43,6 +43,8 @@ impl ActionValue {
 pub struct ActionParams {
 	/// Address of currently executed code.
 	pub code_address: Address,
+	/// Hash of currently executed code.
+	pub code_hash: H256,
 	/// Receive address. Usually equal to code_address,
 	/// except when called using CALLCODE.
 	pub address: Address,
@@ -57,7 +59,7 @@ pub struct ActionParams {
 	/// Transaction value.
 	pub value: ActionValue,
 	/// Code being executed.
-	pub code: Option<Bytes>,
+	pub code: Option<Arc<Bytes>>,
 	/// Input data.
 	pub data: Option<Bytes>,
 	/// Type of call
@@ -70,6 +72,7 @@ impl Default for ActionParams {
 	fn default() -> ActionParams {
 		ActionParams {
 			code_address: Address::new(),
+			code_hash: SHA3_EMPTY,
 			address: Address::new(),
 			sender: Address::new(),
 			origin: Address::new(),
@@ -88,10 +91,11 @@ impl From<ethjson::vm::Transaction> for ActionParams {
 		let address: Address = t.address.into();
 		ActionParams {
 			code_address: Address::new(),
+			code_hash: (&*t.code).sha3(),
 			address: address,
 			sender: t.sender.into(),
 			origin: t.origin.into(),
-			code: Some(t.code.into()),
+			code: Some(Arc::new(t.code.into())),
 			data: Some(t.data.into()),
 			gas: t.gas.into(),
 			gas_price: t.gas_price.into(),
--- a/ethcore/src/block.rs
+++ b/ethcore/src/block.rs
@@ -19,6 +19,7 @@
 use common::*;
 use engines::Engine;
 use state::*;
+use state_db::StateDB;
 use verification::PreverifiedBlock;
 use trace::FlatTrace;
 use evm::Factory as EvmFactory;
@@ -178,7 +179,7 @@ pub trait IsBlock {
 /// 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>;
+	fn drain(self) -> StateDB;
 }

 impl IsBlock for ExecutedBlock {
@@ -233,7 +234,7 @@ impl<'x> OpenBlock<'x> {
 		vm_factory: &'x EvmFactory,
 		trie_factory: TrieFactory,
 		tracing: bool,
-		db: Box<JournalDB>,
+		db: StateDB,
 		parent: &Header,
 		last_hashes: Arc<LastHashes>,
 		author: Address,
@@ -465,7 +466,9 @@ impl LockedBlock {

 impl Drain for LockedBlock {
 	/// Drop this object and return the underlieing database.
-	fn drain(self) -> Box<JournalDB> { self.block.state.drop().1 }
+	fn drain(self) -> StateDB {
+		self.block.state.drop().1
+	}
 }

 impl SealedBlock {
@@ -481,7 +484,9 @@ impl SealedBlock {

 impl Drain for SealedBlock {
 	/// Drop this object and return the underlieing database.
-	fn drain(self) -> Box<JournalDB> { self.block.state.drop().1 }
+	fn drain(self) -> StateDB {
+		self.block.state.drop().1
+	}
 }

 impl IsBlock for SealedBlock {
@@ -496,7 +501,7 @@ pub fn enact(
 	uncles: &[Header],
 	engine: &Engine,
 	tracing: bool,
-	db: Box<JournalDB>,
+	db: StateDB,
 	parent: &Header,
 	last_hashes: Arc<LastHashes>,
 	vm_factory: &EvmFactory,
@@ -505,7 +510,7 @@ pub fn enact(
 	{
 		if ::log::max_log_level() >= ::log::LogLevel::Trace {
 			let s = try!(State::from_existing(db.boxed_clone(), parent.state_root().clone(), engine.account_start_nonce(), trie_factory.clone()));
-			trace!("enact(): root={}, author={}, author_balance={}\n", s.root(), header.author(), s.balance(&header.author()));
+			trace!(target: "enact", "num={}, root={}, author={}, author_balance={}\n", header.number(), s.root(), header.author(), s.balance(&header.author()));
 		}
 	}

@@ -529,7 +534,7 @@ pub fn enact_bytes(
 	block_bytes: &[u8],
 	engine: &Engine,
 	tracing: bool,
-	db: Box<JournalDB>,
+	db: StateDB,
 	parent: &Header,
 	last_hashes: Arc<LastHashes>,
 	vm_factory: &EvmFactory,
@@ -546,7 +551,7 @@ pub fn enact_verified(
 	block: &PreverifiedBlock,
 	engine: &Engine,
 	tracing: bool,
-	db: Box<JournalDB>,
+	db: StateDB,
 	parent: &Header,
 	last_hashes: Arc<LastHashes>,
 	vm_factory: &EvmFactory,
@@ -562,7 +567,7 @@ pub fn enact_and_seal(
 	block_bytes: &[u8],
 	engine: &Engine,
 	tracing: bool,
-	db: Box<JournalDB>,
+	db: StateDB,
 	parent: &Header,
 	last_hashes: Arc<LastHashes>,
 	vm_factory: &EvmFactory,
@@ -582,75 +587,74 @@ mod tests {
 	fn open_block() {
 		use spec::*;
 		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_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(db.as_hashdb_mut()).unwrap();
+		spec.ensure_db_good(&mut db).unwrap();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
+		let b = OpenBlock::new(&*spec.engine, &vm_factory, Default::default(), 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![]);
+		let _ = b.seal(&*spec.engine, vec![]);
 	}

 	#[test]
 	fn enact_block() {
 		use spec::*;
 		let spec = Spec::new_test();
-		let engine = &spec.engine;
+		let engine = &*spec.engine;
 		let genesis_header = spec.genesis_header();

-		let mut db_result = get_temp_journal_db();
+		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(db.as_hashdb_mut()).unwrap();
+		spec.ensure_db_good(&mut db).unwrap();
 		let vm_factory = Default::default();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
-		let b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes.clone(), Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap()
-			.close_and_lock().seal(engine.deref(), vec![]).unwrap();
+		let b = OpenBlock::new(engine, &vm_factory, Default::default(), false, db, &genesis_header, last_hashes.clone(), Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap()
+			.close_and_lock().seal(engine, vec![]).unwrap();
 		let orig_bytes = b.rlp_bytes();
 		let orig_db = b.drain();

-		let mut db_result = get_temp_journal_db();
+		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(db.as_hashdb_mut()).unwrap();
-		let e = enact_and_seal(&orig_bytes, engine.deref(), false, db, &genesis_header, last_hashes, &Default::default(), Default::default()).unwrap();
+		spec.ensure_db_good(&mut db).unwrap();
+		let e = enact_and_seal(&orig_bytes, engine, false, db, &genesis_header, last_hashes, &Default::default(), Default::default()).unwrap();

 		assert_eq!(e.rlp_bytes(), orig_bytes);

 		let db = e.drain();
-		assert_eq!(orig_db.keys(), db.keys());
-		assert!(orig_db.keys().iter().filter(|k| orig_db.get(k.0) != db.get(k.0)).next() == None);
+		assert_eq!(orig_db.journal_db().keys(), db.journal_db().keys());
+		assert!(orig_db.journal_db().keys().iter().filter(|k| orig_db.journal_db().get(k.0) != db.journal_db().get(k.0)).next() == None);
 	}

 	#[test]
 	fn enact_block_with_uncle() {
 		use spec::*;
 		let spec = Spec::new_test();
-		let engine = &spec.engine;
+		let engine = &*spec.engine;
 		let genesis_header = spec.genesis_header();

-		let mut db_result = get_temp_journal_db();
+		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(db.as_hashdb_mut()).unwrap();
+		spec.ensure_db_good(&mut db).unwrap();
 		let vm_factory = Default::default();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
-		let mut open_block = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes.clone(), Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
+		let mut open_block = OpenBlock::new(engine, &vm_factory, Default::default(), false, db, &genesis_header, last_hashes.clone(), 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_and_lock().seal(engine.deref(), vec![]).unwrap();
+		let b = open_block.close_and_lock().seal(engine, vec![]).unwrap();

 		let orig_bytes = b.rlp_bytes();
 		let orig_db = b.drain();

-		let mut db_result = get_temp_journal_db();
+		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(db.as_hashdb_mut()).unwrap();
-		let e = enact_and_seal(&orig_bytes, engine.deref(), false, db, &genesis_header, last_hashes, &Default::default(), Default::default()).unwrap();
+		spec.ensure_db_good(&mut db).unwrap();
+		let e = enact_and_seal(&orig_bytes, engine, false, db, &genesis_header, last_hashes, &Default::default(), Default::default()).unwrap();

 		let bytes = e.rlp_bytes();
 		assert_eq!(bytes, orig_bytes);
@@ -658,7 +662,7 @@ mod tests {
 		assert_eq!(uncles[1].extra_data, b"uncle2");

 		let db = e.drain();
-		assert_eq!(orig_db.keys(), db.keys());
-		assert!(orig_db.keys().iter().filter(|k| orig_db.get(k.0) != db.get(k.0)).next() == None);
+		assert_eq!(orig_db.journal_db().keys(), db.journal_db().keys());
+		assert!(orig_db.journal_db().keys().iter().filter(|k| orig_db.journal_db().get(k.0) != db.journal_db().get(k.0)).next() == None);
 	}
 }
--- a/ethcore/src/blockchain/block_info.rs
+++ b/ethcore/src/blockchain/block_info.rs
@@ -31,7 +31,7 @@ pub struct BlockInfo {
 }

 /// Describes location of newly inserted block.
-#[derive(Clone)]
+#[derive(Debug, Clone)]
 pub enum BlockLocation {
 	/// It's part of the canon chain.
 	CanonChain,
@@ -43,7 +43,7 @@ pub enum BlockLocation {
 	BranchBecomingCanonChain(BranchBecomingCanonChainData),
 }

-#[derive(Clone)]
+#[derive(Debug, Clone)]
 pub struct BranchBecomingCanonChainData {
 	/// Hash of the newest common ancestor with old canon chain.
 	pub ancestor: H256,
--- a/ethcore/src/blockchain/blockchain.rs
+++ b/ethcore/src/blockchain/blockchain.rs
@@ -133,8 +133,9 @@ enum 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.db.read_with_cache(DB_COL_EXTRA, &self.blocks_blooms, &position).map(Into::into)
+		let result = self.db.read_with_cache(DB_COL_EXTRA, &self.blocks_blooms, &position).map(Into::into);
+		self.note_used(CacheID::BlocksBlooms(position));
+		result
 	}
 }

@@ -164,7 +165,7 @@ pub struct BlockChain {

 	pending_best_block: RwLock<Option<BestBlock>>,
 	pending_block_hashes: RwLock<HashMap<BlockNumber, H256>>,
-	pending_transaction_addresses: RwLock<HashMap<H256, TransactionAddress>>,
+	pending_transaction_addresses: RwLock<HashMap<H256, Option<TransactionAddress>>>,
 }

 impl BlockProvider for BlockChain {
@@ -211,9 +212,7 @@ impl BlockProvider for BlockChain {
 		let opt = self.db.get(DB_COL_HEADERS, hash)
 			.expect("Low level database error. Some issue with disk?");

-		self.note_used(CacheID::BlockHeader(hash.clone()));
-
-		match opt {
+		let result = match opt {
 			Some(b) => {
 				let bytes: Bytes = UntrustedRlp::new(&b).decompress(RlpType::Blocks).to_vec();
 				let mut write = self.block_headers.write();
@@ -221,7 +220,10 @@ impl BlockProvider for BlockChain {
 				Some(bytes)
 			},
 			None => None
-		}
+		};
+
+		self.note_used(CacheID::BlockHeader(hash.clone()));
+		result
 	}

 	/// Get block body data
@@ -246,9 +248,7 @@ impl BlockProvider for BlockChain {
 		let opt = self.db.get(DB_COL_BODIES, hash)
 			.expect("Low level database error. Some issue with disk?");

-		self.note_used(CacheID::BlockBody(hash.clone()));
-
-		match opt {
+		let result = match opt {
 			Some(b) => {
 				let bytes: Bytes = UntrustedRlp::new(&b).decompress(RlpType::Blocks).to_vec();
 				let mut write = self.block_bodies.write();
@@ -256,31 +256,39 @@ impl BlockProvider for BlockChain {
 				Some(bytes)
 			},
 			None => None
-		}
+		};
+
+		self.note_used(CacheID::BlockBody(hash.clone()));
+
+		result
 	}

 	/// Get the familial details concerning a block.
 	fn block_details(&self, hash: &H256) -> Option<BlockDetails> {
+		let result = self.db.read_with_cache(DB_COL_EXTRA, &self.block_details, hash);
 		self.note_used(CacheID::BlockDetails(hash.clone()));
-		self.db.read_with_cache(DB_COL_EXTRA, &self.block_details, hash)
+		result
 	}

 	/// Get the hash of given block's number.
 	fn block_hash(&self, index: BlockNumber) -> Option<H256> {
+		let result = self.db.read_with_cache(DB_COL_EXTRA, &self.block_hashes, &index);
 		self.note_used(CacheID::BlockHashes(index));
-		self.db.read_with_cache(DB_COL_EXTRA, &self.block_hashes, &index)
+		result
 	}

 	/// Get the address of transaction with given hash.
 	fn transaction_address(&self, hash: &H256) -> Option<TransactionAddress> {
+		let result = self.db.read_with_cache(DB_COL_EXTRA, &self.transaction_addresses, hash);
 		self.note_used(CacheID::TransactionAddresses(hash.clone()));
-		self.db.read_with_cache(DB_COL_EXTRA, &self.transaction_addresses, hash)
+		result
 	}

 	/// Get receipts of block with given hash.
 	fn block_receipts(&self, hash: &H256) -> Option<BlockReceipts> {
+		let result = self.db.read_with_cache(DB_COL_EXTRA, &self.block_receipts, hash);
 		self.note_used(CacheID::BlockReceipts(hash.clone()));
-		self.db.read_with_cache(DB_COL_EXTRA, &self.block_receipts, hash)
+		result
 	}

 	/// Returns numbers of blocks containing given bloom.
@@ -576,8 +584,8 @@ impl BlockChain {
 				block_hashes: self.prepare_block_hashes_update(bytes, &info),
 				block_details: self.prepare_block_details_update(bytes, &info),
 				block_receipts: self.prepare_block_receipts_update(receipts, &info),
-				transactions_addresses: self.prepare_transaction_addresses_update(bytes, &info),
 				blocks_blooms: self.prepare_block_blooms_update(bytes, &info),
+				transactions_addresses: self.prepare_transaction_addresses_update(bytes, &info),
 				info: info,
 				block: bytes
 			}, is_best);
@@ -610,8 +618,8 @@ impl BlockChain {
 				block_hashes: self.prepare_block_hashes_update(bytes, &info),
 				block_details: update,
 				block_receipts: self.prepare_block_receipts_update(receipts, &info),
-				transactions_addresses: self.prepare_transaction_addresses_update(bytes, &info),
 				blocks_blooms: self.prepare_block_blooms_update(bytes, &info),
+				transactions_addresses: self.prepare_transaction_addresses_update(bytes, &info),
 				info: info,
 				block: bytes,
 			}, is_best);
@@ -635,11 +643,12 @@ impl BlockChain {
 		let mut update = HashMap::new();
 		update.insert(block_hash, parent_details);

-		self.note_used(CacheID::BlockDetails(block_hash));

 		let mut write_details = self.block_details.write();
 		batch.extend_with_cache(DB_COL_EXTRA, &mut *write_details, update, CacheUpdatePolicy::Overwrite);

+		self.note_used(CacheID::BlockDetails(block_hash));
+
 		self.db.write(batch).unwrap();
 	}

@@ -678,8 +687,8 @@ impl BlockChain {
 			block_hashes: self.prepare_block_hashes_update(bytes, &info),
 			block_details: self.prepare_block_details_update(bytes, &info),
 			block_receipts: self.prepare_block_receipts_update(receipts, &info),
-			transactions_addresses: self.prepare_transaction_addresses_update(bytes, &info),
 			blocks_blooms: self.prepare_block_blooms_update(bytes, &info),
+			transactions_addresses: self.prepare_transaction_addresses_update(bytes, &info),
 			info: info.clone(),
 			block: bytes,
 		}, true);
@@ -730,12 +739,15 @@ impl BlockChain {
 	/// Prepares extras update.
 	fn prepare_update(&self, batch: &DBTransaction, update: ExtrasUpdate, is_best: bool) {
 		{
-			for hash in update.block_details.keys().cloned() {
-				self.note_used(CacheID::BlockDetails(hash));
-			}
+			let block_hashes: Vec<_> = update.block_details.keys().cloned().collect();

 			let mut write_details = self.block_details.write();
 			batch.extend_with_cache(DB_COL_EXTRA, &mut *write_details, update.block_details, CacheUpdatePolicy::Overwrite);
+
+			let mut cache_man = self.cache_man.write();
+			for hash in block_hashes.into_iter() {
+				cache_man.note_used(CacheID::BlockDetails(hash));
+			}
 		}

 		{
@@ -769,25 +781,45 @@ impl BlockChain {
 			let mut write_txs = self.pending_transaction_addresses.write();

 			batch.extend_with_cache(DB_COL_EXTRA, &mut *write_hashes, update.block_hashes, CacheUpdatePolicy::Overwrite);
-			batch.extend_with_cache(DB_COL_EXTRA, &mut *write_txs, update.transactions_addresses, CacheUpdatePolicy::Overwrite);
+			batch.extend_with_option_cache(DB_COL_EXTRA, &mut *write_txs, update.transactions_addresses, CacheUpdatePolicy::Overwrite);
 		}
 	}

-	/// Applt pending insertion updates
+	/// Apply pending insertion updates
 	pub fn commit(&self) {
-		let mut best_block = self.best_block.write();
-		let mut write_hashes = self.block_hashes.write();
-		let mut write_txs = self.transaction_addresses.write();
 		let mut pending_best_block = self.pending_best_block.write();
 		let mut pending_write_hashes = self.pending_block_hashes.write();
 		let mut pending_write_txs = self.pending_transaction_addresses.write();
+
+		let mut best_block = self.best_block.write();
+		let mut write_hashes = self.block_hashes.write();
+		let mut write_txs = self.transaction_addresses.write();
 		// update best block
 		if let Some(block) = pending_best_block.take() {
 			*best_block = block;
 		}

+		let pending_txs = mem::replace(&mut *pending_write_txs, HashMap::new());
+		let (retracted_txs, enacted_txs) = pending_txs.into_iter().partition::<HashMap<_, _>, _>(|&(_, ref value)| value.is_none());
+
+		let pending_hashes_keys: Vec<_> = pending_write_hashes.keys().cloned().collect();
+		let enacted_txs_keys: Vec<_> = enacted_txs.keys().cloned().collect();
+
 		write_hashes.extend(mem::replace(&mut *pending_write_hashes, HashMap::new()));
-		write_txs.extend(mem::replace(&mut *pending_write_txs, HashMap::new()));
+		write_txs.extend(enacted_txs.into_iter().map(|(k, v)| (k, v.expect("Transactions were partitioned; qed"))));
+
+		for hash in retracted_txs.keys() {
+			write_txs.remove(hash);
+		}
+
+		let mut cache_man = self.cache_man.write();
+		for n in pending_hashes_keys.into_iter() {
+			cache_man.note_used(CacheID::BlockHashes(n));
+		}
+
+		for hash in enacted_txs_keys {
+			cache_man.note_used(CacheID::TransactionAddresses(hash));
+		}
 	}

 	/// Iterator that lists `first` and then all of `first`'s ancestors, by hash.
@@ -887,19 +919,56 @@ impl BlockChain {
 	}

 	/// This function returns modified transaction addresses.
-	fn prepare_transaction_addresses_update(&self, block_bytes: &[u8], info: &BlockInfo) -> HashMap<H256, TransactionAddress> {
+	fn prepare_transaction_addresses_update(&self, block_bytes: &[u8], info: &BlockInfo) -> HashMap<H256, Option<TransactionAddress>> {
 		let block = BlockView::new(block_bytes);
 		let transaction_hashes = block.transaction_hashes();

-		transaction_hashes.into_iter()
-			.enumerate()
-			.fold(HashMap::new(), |mut acc, (i ,tx_hash)| {
-				acc.insert(tx_hash, TransactionAddress {
-					block_hash: info.hash.clone(),
-					index: i
+		match info.location {
+			BlockLocation::CanonChain => {
+				transaction_hashes.into_iter()
+					.enumerate()
+					.map(|(i ,tx_hash)| {
+						(tx_hash, Some(TransactionAddress {
+							block_hash: info.hash.clone(),
+							index: i
+						}))
+					})
+					.collect()
+			},
+			BlockLocation::BranchBecomingCanonChain(ref data) => {
+				let addresses = data.enacted.iter()
+					.flat_map(|hash| {
+						let bytes = self.block_body(hash).expect("Enacted block must be in database.");
+						let hashes = BodyView::new(&bytes).transaction_hashes();
+						hashes.into_iter()
+							.enumerate()
+							.map(|(i, tx_hash)| (tx_hash, Some(TransactionAddress {
+								block_hash: hash.clone(),
+								index: i,
+							})))
+							.collect::<HashMap<H256, Option<TransactionAddress>>>()
+					});
+
+				let current_addresses = transaction_hashes.into_iter()
+					.enumerate()
+					.map(|(i ,tx_hash)| {
+						(tx_hash, Some(TransactionAddress {
+							block_hash: info.hash.clone(),
+							index: i
+						}))
+					});
+
+				let retracted = data.retracted.iter().flat_map(|hash| {
+					let bytes = self.block_body(hash).expect("Retracted block must be in database.");
+					let hashes = BodyView::new(&bytes).transaction_hashes();
+					hashes.into_iter().map(|hash| (hash, None)).collect::<HashMap<H256, Option<TransactionAddress>>>()
 				});
-				acc
-			})
+
+				// The order here is important! Don't remove transaction if it was part of enacted blocks as well.
+				retracted.chain(addresses).chain(current_addresses).collect()
+			},
+			BlockLocation::Branch => HashMap::new(),
+		}
 	}

 	/// This functions returns modified blocks blooms.
@@ -992,16 +1061,18 @@ impl BlockChain {

 	/// Ticks our cache system and throws out any old data.
 	pub fn collect_garbage(&self) {
-		let mut cache_man = self.cache_man.write();
-		cache_man.collect_garbage(|| self.cache_size().total(), | ids | {
-			let mut block_headers = self.block_headers.write();
-			let mut block_bodies = self.block_bodies.write();
-			let mut block_details = self.block_details.write();
-			let mut block_hashes = self.block_hashes.write();
-			let mut transaction_addresses = self.transaction_addresses.write();
-			let mut blocks_blooms = self.blocks_blooms.write();
-			let mut block_receipts = self.block_receipts.write();
+		let current_size = self.cache_size().total();

+		let mut block_headers = self.block_headers.write();
+		let mut block_bodies = self.block_bodies.write();
+		let mut block_details = self.block_details.write();
+		let mut block_hashes = self.block_hashes.write();
+		let mut transaction_addresses = self.transaction_addresses.write();
+		let mut blocks_blooms = self.blocks_blooms.write();
+		let mut block_receipts = self.block_receipts.write();
+
+		let mut cache_man = self.cache_man.write();
+		cache_man.collect_garbage(current_size, | ids | {
 			for id in &ids {
 				match *id {
 					CacheID::BlockHeader(ref h) => { block_headers.remove(h); },
@@ -1013,6 +1084,7 @@ impl BlockChain {
 					CacheID::BlockReceipts(ref h) => { block_receipts.remove(h); }
 				}
 			}
+
 			block_headers.shrink_to_fit();
 			block_bodies.shrink_to_fit();
 			block_details.shrink_to_fit();
@@ -1020,6 +1092,14 @@ impl BlockChain {
 			transaction_addresses.shrink_to_fit();
 			blocks_blooms.shrink_to_fit();
 			block_receipts.shrink_to_fit();
+
+			block_headers.heap_size_of_children() +
+			block_bodies.heap_size_of_children() +
+			block_details.heap_size_of_children() +
+			block_hashes.heap_size_of_children() +
+			transaction_addresses.heap_size_of_children() +
+			blocks_blooms.heap_size_of_children() +
+			block_receipts.heap_size_of_children()
 		});
 	}

@@ -1036,7 +1116,6 @@ impl BlockChain {
 #[cfg(test)]
 mod tests {
 	#![cfg_attr(feature="dev", allow(similar_names))]
-	use std::str::FromStr;
 	use std::sync::Arc;
 	use rustc_serialize::hex::FromHex;
 	use util::{Database, DatabaseConfig};
@@ -1047,8 +1126,10 @@ mod tests {
 	use tests::helpers::*;
 	use devtools::*;
 	use blockchain::generator::{ChainGenerator, ChainIterator, BlockFinalizer};
+	use blockchain::extras::TransactionAddress;
 	use views::BlockView;
 	use client;
+	use transaction::{Transaction, Action};

 	fn new_db(path: &str) -> Arc<Database> {
 		Arc::new(Database::open(&DatabaseConfig::with_columns(client::DB_NO_OF_COLUMNS), path).unwrap())
@@ -1183,6 +1264,170 @@ mod tests {
 		// TODO: insert block that already includes one of them as an uncle to check it's not allowed.
 	}

+	#[test]
+	fn test_fork_transaction_addresses() {
+		let mut canon_chain = ChainGenerator::default();
+		let mut finalizer = BlockFinalizer::default();
+		let genesis = canon_chain.generate(&mut finalizer).unwrap();
+		let mut fork_chain = canon_chain.fork(1);
+		let mut fork_finalizer = finalizer.fork();
+
+		let t1 = Transaction {
+			nonce: 0.into(),
+			gas_price: 0.into(),
+			gas: 100_000.into(),
+			action: Action::Create,
+			value: 100.into(),
+			data: "601080600c6000396000f3006000355415600957005b60203560003555".from_hex().unwrap(),
+		}.sign(&"".sha3());
+
+
+		let b1a = canon_chain
+			.with_transaction(t1.clone())
+			.generate(&mut finalizer).unwrap();
+
+		// Empty block
+		let b1b = fork_chain
+			.generate(&mut fork_finalizer).unwrap();
+
+		let b2 = fork_chain
+			.generate(&mut fork_finalizer).unwrap();
+
+		let b1a_hash = BlockView::new(&b1a).header_view().sha3();
+		let b2_hash = BlockView::new(&b2).header_view().sha3();
+
+		let t1_hash = t1.hash();
+
+		let temp = RandomTempPath::new();
+		let db = new_db(temp.as_str());
+		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+
+		let mut batch = db.transaction();
+		let _ = bc.insert_block(&mut batch, &b1a, vec![]);
+		bc.commit();
+		let _ = bc.insert_block(&mut batch, &b1b, vec![]);
+		bc.commit();
+		db.write(batch).unwrap();
+
+		assert_eq!(bc.best_block_hash(), b1a_hash);
+		assert_eq!(bc.transaction_address(&t1_hash), Some(TransactionAddress {
+			block_hash: b1a_hash.clone(),
+			index: 0,
+		}));
+
+		// now let's make forked chain the canon chain
+		let mut batch = db.transaction();
+		let _ = bc.insert_block(&mut batch, &b2, vec![]);
+		bc.commit();
+		db.write(batch).unwrap();
+
+		// Transaction should be retracted
+		assert_eq!(bc.best_block_hash(), b2_hash);
+		assert_eq!(bc.transaction_address(&t1_hash), None);
+	}
+
+
+
+	#[test]
+	fn test_overwriting_transaction_addresses() {
+		let mut canon_chain = ChainGenerator::default();
+		let mut finalizer = BlockFinalizer::default();
+		let genesis = canon_chain.generate(&mut finalizer).unwrap();
+		let mut fork_chain = canon_chain.fork(1);
+		let mut fork_finalizer = finalizer.fork();
+
+		let t1 = Transaction {
+			nonce: 0.into(),
+			gas_price: 0.into(),
+			gas: 100_000.into(),
+			action: Action::Create,
+			value: 100.into(),
+			data: "601080600c6000396000f3006000355415600957005b60203560003555".from_hex().unwrap(),
+		}.sign(&"".sha3());
+
+		let t2 = Transaction {
+			nonce: 1.into(),
+			gas_price: 0.into(),
+			gas: 100_000.into(),
+			action: Action::Create,
+			value: 100.into(),
+			data: "601080600c6000396000f3006000355415600957005b60203560003555".from_hex().unwrap(),
+		}.sign(&"".sha3());
+
+		let t3 = Transaction {
+			nonce: 2.into(),
+			gas_price: 0.into(),
+			gas: 100_000.into(),
+			action: Action::Create,
+			value: 100.into(),
+			data: "601080600c6000396000f3006000355415600957005b60203560003555".from_hex().unwrap(),
+		}.sign(&"".sha3());
+
+		let b1a = canon_chain
+			.with_transaction(t1.clone())
+			.with_transaction(t2.clone())
+			.generate(&mut finalizer).unwrap();
+
+		// insert transactions in different order
+		let b1b = fork_chain
+			.with_transaction(t2.clone())
+			.with_transaction(t1.clone())
+			.generate(&mut fork_finalizer).unwrap();
+
+		let b2 = fork_chain
+			.with_transaction(t3.clone())
+			.generate(&mut fork_finalizer).unwrap();
+
+		let b1a_hash = BlockView::new(&b1a).header_view().sha3();
+		let b1b_hash = BlockView::new(&b1b).header_view().sha3();
+		let b2_hash = BlockView::new(&b2).header_view().sha3();
+
+		let t1_hash = t1.hash();
+		let t2_hash = t2.hash();
+		let t3_hash = t3.hash();
+
+		let temp = RandomTempPath::new();
+		let db = new_db(temp.as_str());
+		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+
+		let mut batch = db.transaction();
+		let _ = bc.insert_block(&mut batch, &b1a, vec![]);
+		bc.commit();
+		let _ = bc.insert_block(&mut batch, &b1b, vec![]);
+		bc.commit();
+		db.write(batch).unwrap();
+
+		assert_eq!(bc.best_block_hash(), b1a_hash);
+		assert_eq!(bc.transaction_address(&t1_hash), Some(TransactionAddress {
+			block_hash: b1a_hash.clone(),
+			index: 0,
+		}));
+		assert_eq!(bc.transaction_address(&t2_hash), Some(TransactionAddress {
+			block_hash: b1a_hash.clone(),
+			index: 1,
+		}));
+
+		// now let's make forked chain the canon chain
+		let mut batch = db.transaction();
+		let _ = bc.insert_block(&mut batch, &b2, vec![]);
+		bc.commit();
+		db.write(batch).unwrap();
+
+		assert_eq!(bc.best_block_hash(), b2_hash);
+		assert_eq!(bc.transaction_address(&t1_hash), Some(TransactionAddress {
+			block_hash: b1b_hash.clone(),
+			index: 1,
+		}));
+		assert_eq!(bc.transaction_address(&t2_hash), Some(TransactionAddress {
+			block_hash: b1b_hash.clone(),
+			index: 0,
+		}));
+		assert_eq!(bc.transaction_address(&t3_hash), Some(TransactionAddress {
+			block_hash: b2_hash.clone(),
+			index: 0,
+		}));
+	}
+
 	#[test]
 	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
 	fn test_small_fork() {
@@ -1383,7 +1628,7 @@ mod tests {
 	fn find_transaction_by_hash() {
 		let genesis = "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".from_hex().unwrap();
 		let b1 = "f904a8f901faa0ce1f26f798dd03c8782d63b3e42e79a64eaea5694ea686ac5d7ce3df5171d1aea01dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347948888f1f195afa192cfee860698584c030f4c9db1a0a65c2364cd0f1542d761823dc0109c6b072f14c20459598c5455c274601438f4a070616ebd7ad2ed6fb7860cf7e9df00163842351c38a87cac2c1cb193895035a2a05c5b4fc43c2d45787f54e1ae7d27afdb4ad16dfc567c5692070d5c4556e0b1d7b9010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000830200000183023ec683021536845685109780a029f07836e4e59229b3a065913afc27702642c683bba689910b2b2fd45db310d3888957e6d004a31802f902a7f85f800a8255f094aaaf5374fce5edbc8e2a8697c15331677e6ebf0b0a801ca0575da4e21b66fa764be5f74da9389e67693d066fb0d1312e19e17e501da00ecda06baf5a5327595f6619dfc2fcb3f2e6fb410b5810af3cb52d0e7508038e91a188f85f010a82520894bbbf5374fce5edbc8e2a8697c15331677e6ebf0b0a801ba04fa966bf34b93abc1bcd665554b7f316b50f928477b50be0f3285ead29d18c5ba017bba0eeec1625ab433746955e125d46d80b7fdc97386c51266f842d8e02192ef85f020a82520894bbbf5374fce5edbc8e2a8697c15331677e6ebf0b0a801ca004377418ae981cc32b1312b4a427a1d69a821b28db8584f5f2bd8c6d42458adaa053a1dba1af177fac92f3b6af0a9fa46a22adf56e686c93794b6a012bf254abf5f85f030a82520894bbbf5374fce5edbc8e2a8697c15331677e6ebf0b0a801ca04fe13febd28a05f4fcb2f451d7ddc2dda56486d9f8c79a62b0ba4da775122615a0651b2382dd402df9ebc27f8cb4b2e0f3cea68dda2dca0ee9603608f0b6f51668f85f040a82520894bbbf5374fce5edbc8e2a8697c15331677e6ebf0b0a801ba078e6a0ba086a08f8450e208a399bb2f2d2a0d984acd2517c7c7df66ccfab567da013254002cd45a97fac049ae00afbc43ed0d9961d0c56a3b2382c80ce41c198ddf85f050a82520894bbbf5374fce5edbc8e2a8697c15331677e6ebf0b0a801ba0a7174d8f43ea71c8e3ca9477691add8d80ac8e0ed89d8d8b572041eef81f4a54a0534ea2e28ec4da3b5b944b18c51ec84a5cf35f5b3343c5fb86521fd2d388f506f85f060a82520894bbbf5374fce5edbc8e2a8697c15331677e6ebf0b0a801ba034bd04065833536a10c77ee2a43a5371bc6d34837088b861dd9d4b7f44074b59a078807715786a13876d3455716a6b9cb2186b7a4887a5c31160fc877454958616c0".from_hex().unwrap();
-		let b1_hash = H256::from_str("f53f268d23a71e85c7d6d83a9504298712b84c1a2ba220441c86eeda0bf0b6e3").unwrap();
+		let b1_hash: H256 = "f53f268d23a71e85c7d6d83a9504298712b84c1a2ba220441c86eeda0bf0b6e3".into();

 		let temp = RandomTempPath::new();
 		let db = new_db(temp.as_str());
@@ -1411,11 +1656,11 @@ mod tests {
 	#[test]
 	fn test_bloom_filter_simple() {
 		// TODO: From here
-		let bloom_b1 = H2048::from_str("00000020000000000000000000000000000000000000000002000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000040000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000400000000000000000000002000").unwrap();
+		let bloom_b1: H2048 = "00000020000000000000000000000000000000000000000002000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000040000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000400000000000000000000002000".into();

-		let bloom_b2 = H2048::from_str("00000000000000000000000000000000000000000000020000001000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000008000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000").unwrap();
+		let bloom_b2: H2048 = "00000000000000000000000000000000000000000000020000001000000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000008000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000".into();

-		let bloom_ba = H2048::from_str("00000000000000000000000000000000000000000000020000000800000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000008000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000").unwrap();
+		let bloom_ba: H2048 = "00000000000000000000000000000000000000000000020000000800000000000000000000000000000000000000000000000000000000000000000000000000100000000000000000008000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000".into();

 		let mut canon_chain = ChainGenerator::default();
 		let mut finalizer = BlockFinalizer::default();
--- a/ethcore/src/blockchain/extras.rs
+++ b/ethcore/src/blockchain/extras.rs
@@ -176,7 +176,7 @@ impl Encodable for BlockDetails {
 }

 /// Represents address of certain transaction within block
-#[derive(Clone)]
+#[derive(Debug, PartialEq, Clone)]
 pub struct TransactionAddress {
 	/// Block hash
 	pub block_hash: H256,
--- a/ethcore/src/blockchain/generator/block.rs
+++ b/ethcore/src/blockchain/generator/block.rs
@@ -16,7 +16,6 @@

 use util::rlp::*;
 use util::{H256, H2048};
-use util::U256;
 use util::bytes::Bytes;
 use header::Header;
 use transaction::SignedTransaction;
@@ -24,6 +23,7 @@ use transaction::SignedTransaction;
 use super::fork::Forkable;
 use super::bloom::WithBloom;
 use super::complete::CompleteBlock;
+use super::transaction::WithTransaction;

 /// Helper structure, used for encoding blocks.
 #[derive(Default)]
@@ -44,7 +44,8 @@ impl Encodable for Block {

 impl Forkable for Block {
 	fn fork(mut self, fork_number: usize) -> Self where Self: Sized {
-		self.header.difficulty = self.header.difficulty - U256::from(fork_number);
+		let difficulty = self.header.difficulty().clone() - fork_number.into();
+		self.header.difficulty = difficulty;
 		self
 	}
 }
@@ -56,6 +57,13 @@ impl WithBloom for Block {
 	}
 }

+impl WithTransaction for Block {
+	fn with_transaction(mut self, transaction: SignedTransaction) -> Self where Self: Sized {
+		self.transactions.push(transaction);
+		self
+	}
+}
+
 impl CompleteBlock for Block {
 	fn complete(mut self, parent_hash: H256) -> Bytes {
 		self.header.parent_hash = parent_hash;
--- a/ethcore/src/blockchain/generator/generator.rs
+++ b/ethcore/src/blockchain/generator/generator.rs
@@ -18,10 +18,12 @@ use util::hash::H2048;
 use util::numbers::U256;
 use util::bytes::Bytes;
 use header::BlockNumber;
+use transaction::SignedTransaction;
 use super::fork::Fork;
 use super::bloom::Bloom;
 use super::complete::{BlockFinalizer, CompleteBlock, Complete};
 use super::block::Block;
+use super::transaction::Transaction;

 /// Chain iterator interface.
 pub trait ChainIterator: Iterator + Sized {
@@ -30,6 +32,8 @@ pub trait ChainIterator: Iterator + Sized {
 	fn fork(&self, fork_number: usize) -> Fork<Self> where Self: Clone;
 	/// Should be called to make every consecutive block have given bloom.
 	fn with_bloom(&mut self, bloom: H2048) -> Bloom<Self>;
+	/// Should be called to make every consecutive block have given transaction.
+	fn with_transaction(&mut self, transaction: SignedTransaction) -> Transaction<Self>;
 	/// Should be called to complete block. Without complete, block may have incorrect hash.
 	fn complete<'a>(&'a mut self, finalizer: &'a mut BlockFinalizer) -> Complete<'a, Self>;
 	/// Completes and generates block.
@@ -51,6 +55,13 @@ impl<I> ChainIterator for I where I: Iterator + Sized {
 		}
 	}

+	fn with_transaction(&mut self, transaction: SignedTransaction) -> Transaction<Self> {
+		Transaction {
+			iter: self,
+			transaction: transaction,
+		}
+	}
+
 	fn complete<'a>(&'a mut self, finalizer: &'a mut BlockFinalizer) -> Complete<'a, Self> {
 		Complete {
 			iter: self,
@@ -85,7 +96,7 @@ impl Default for ChainGenerator {
 	fn default() -> Self {
 		ChainGenerator {
 			number: 0,
-			difficulty: U256::from(1000),
+			difficulty: 1000.into(),
 		}
 	}
 }
--- a/ethcore/src/blockchain/generator/mod.rs
+++ b/ethcore/src/blockchain/generator/mod.rs
@@ -21,6 +21,7 @@ mod block;
 mod complete;
 mod fork;
 pub mod generator;
+mod transaction;

 pub use self::complete::BlockFinalizer;
 pub use self::generator::{ChainIterator, ChainGenerator};
--- a/ethcore/src/blockchain/generator/transaction.rs
+++ b/ethcore/src/blockchain/generator/transaction.rs
@@ -0,0 +1,35 @@
+// 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 transaction::SignedTransaction;
+
+pub trait WithTransaction {
+	fn with_transaction(self, transaction: SignedTransaction) -> Self where Self: Sized;
+}
+
+pub struct Transaction<'a, I> where I: 'a {
+	pub iter: &'a mut I,
+	pub transaction: SignedTransaction,
+}
+
+impl <'a, I> Iterator for Transaction<'a, I> where I: Iterator, <I as Iterator>::Item: WithTransaction {
+	type Item = <I as Iterator>::Item;
+
+	#[inline]
+	fn next(&mut self) -> Option<Self::Item> {
+		self.iter.next().map(|item| item.with_transaction(self.transaction.clone()))
+	}
+}
--- a/ethcore/src/blockchain/update.rs
+++ b/ethcore/src/blockchain/update.rs
@@ -17,8 +17,8 @@ pub struct ExtrasUpdate<'a> {
 	pub block_details: HashMap<H256, BlockDetails>,
 	/// Modified block receipts.
 	pub block_receipts: HashMap<H256, BlockReceipts>,
-	/// Modified transaction addresses.
-	pub transactions_addresses: HashMap<H256, TransactionAddress>,
 	/// Modified blocks blooms.
 	pub blocks_blooms: HashMap<LogGroupPosition, BloomGroup>,
+	/// Modified transaction addresses (None signifies removed transactions).
+	pub transactions_addresses: HashMap<H256, Option<TransactionAddress>>,
 }
--- a/ethcore/src/cache_manager.rs
+++ b/ethcore/src/cache_manager.rs
@@ -45,16 +45,19 @@ impl<T> CacheManager<T> where T: Eq + Hash {
 		}
 	}

-	pub fn collect_garbage<C, F>(&mut self, current_size: C, mut notify_unused: F) where C: Fn() -> usize, F: FnMut(HashSet<T>) {
-		if current_size() < self.pref_cache_size {
+	/// Collects unused objects from cache.
+	/// First params is the current size of the cache.
+	/// Second one is an with objects to remove. It should also return new size of the cache.
+	pub fn collect_garbage<F>(&mut self, current_size: usize, mut notify_unused: F) where F: FnMut(HashSet<T>) -> usize {
+		if current_size < self.pref_cache_size {
 			self.rotate_cache_if_needed();
 			return;
 		}

 		for _ in 0..COLLECTION_QUEUE_SIZE {
-			notify_unused(self.cache_usage.pop_back().unwrap());
+			let current_size = notify_unused(self.cache_usage.pop_back().unwrap());
 			self.cache_usage.push_front(Default::default());
-			if current_size() < self.max_cache_size {
+			if current_size < self.max_cache_size {
 				break;
 			}
 		}
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@@ -13,7 +13,7 @@

 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
-use std::collections::{HashSet, HashMap, VecDeque};
+use std::collections::{HashSet, HashMap, BTreeMap, VecDeque};
 use std::sync::{Arc, Weak};
 use std::path::{Path};
 use std::fmt;
@@ -23,7 +23,6 @@ use time::precise_time_ns;

 // util
 use util::{journaldb, rlp, Bytes, View, PerfTimer, Itertools, Mutex, RwLock};
-use util::journaldb::JournalDB;
 use util::rlp::{UntrustedRlp};
 use util::numbers::*;
 use util::sha3::*;
@@ -49,8 +48,11 @@ use types::filter::Filter;
 use log_entry::LocalizedLogEntry;
 use block_queue::{BlockQueue, BlockQueueInfo};
 use blockchain::{BlockChain, BlockProvider, TreeRoute, ImportRoute};
-use client::{BlockID, TransactionID, UncleID, TraceId, ClientConfig, BlockChainClient, MiningBlockChainClient,
-	TraceFilter, CallAnalytics, BlockImportError, Mode, ChainNotify};
+use client::{
+	BlockID, TransactionID, UncleID, TraceId, ClientConfig, BlockChainClient,
+	MiningBlockChainClient, TraceFilter, CallAnalytics, BlockImportError, Mode,
+	ChainNotify
+};
 use client::Error as ClientError;
 use env_info::EnvInfo;
 use executive::{Executive, Executed, TransactOptions, contract_address};
@@ -62,6 +64,7 @@ use evm::Factory as EvmFactory;
 use miner::{Miner, MinerService};
 use util::TrieFactory;
 use snapshot::{self, io as snapshot_io};
+use state_db::StateDB;

 // re-export
 pub use types::blockchain_info::BlockChainInfo;
@@ -121,7 +124,7 @@ pub struct Client {
 	tracedb: Arc<TraceDB<BlockChain>>,
 	engine: Arc<Engine>,
 	db: Arc<Database>,
-	state_db: Mutex<Box<JournalDB>>,
+	state_db: Mutex<StateDB>,
 	block_queue: BlockQueue,
 	report: RwLock<ClientReport>,
 	import_lock: Mutex<()>,
@@ -151,8 +154,10 @@ pub const DB_COL_BODIES: Option<u32> = Some(2);
 pub const DB_COL_EXTRA: Option<u32> = Some(3);
 /// Column for Traces
 pub const DB_COL_TRACE: Option<u32> = Some(4);
+/// Column for Traces
+pub const DB_COL_ACCOUNT_BLOOM: Option<u32> = Some(5);
 /// Number of columns in DB
-pub const DB_NO_OF_COLUMNS: Option<u32> = Some(5);
+pub const DB_NO_OF_COLUMNS: Option<u32> = Some(6);

 /// Append a path element to the given path and return the string.
 pub fn append_path<P>(path: P, item: &str) -> String where P: AsRef<Path> {
@@ -181,14 +186,15 @@ impl Client {
 		let chain = Arc::new(BlockChain::new(config.blockchain, &gb, db.clone()));
 		let tracedb = Arc::new(try!(TraceDB::new(config.tracing, db.clone(), chain.clone())));

-		let mut state_db = journaldb::new(db.clone(), config.pruning, DB_COL_STATE);
-		if state_db.is_empty() && try!(spec.ensure_db_good(state_db.as_hashdb_mut())) {
+		let journal_db = journaldb::new(db.clone(), config.pruning, DB_COL_STATE);
+		let mut state_db = StateDB::new(journal_db);
+		if state_db.journal_db().is_empty() && try!(spec.ensure_db_good(&mut state_db)) {
 			let batch = DBTransaction::new(&db);
 			try!(state_db.commit(&batch, 0, &spec.genesis_header().hash(), None));
 			try!(db.write(batch).map_err(ClientError::Database));
 		}

-		if !chain.block_header(&chain.best_block_hash()).map_or(true, |h| state_db.contains(h.state_root())) {
+		if !chain.block_header(&chain.best_block_hash()).map_or(true, |h| state_db.journal_db().contains(h.state_root())) {
 			warn!("State root not found for block #{} ({})", chain.best_block_number(), chain.best_block_hash().hex());
 		}

@@ -298,7 +304,8 @@ impl Client {
 		// 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().boxed_clone();
+		let is_canon = header.parent_hash == self.chain.best_block_hash();
+		let db = if is_canon { self.state_db.lock().boxed_clone_canon() } else { self.state_db.lock().boxed_clone() };

 		let enact_result = enact_verified(block, engine, self.tracedb.tracing_enabled(), db, &parent, last_hashes, &self.vm_factory, self.trie_factory.clone());
 		if let Err(e) = enact_result {
@@ -440,7 +447,8 @@ impl Client {
 		// 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(&batch, number, hash, ancient).expect("DB commit failed.");
+		let mut state = block.drain();
+		state.commit(&batch, number, hash, ancient).expect("DB commit failed.");

 		let route = self.chain.insert_block(&batch, block_data, receipts);
 		self.tracedb.import(&batch, TraceImportRequest {
@@ -453,7 +461,6 @@ impl Client {
 		// Final commit to the DB
 		self.db.write_buffered(batch).expect("DB write failed.");
 		self.chain.commit();
-
 		self.update_last_hashes(&parent, hash);
 		route
 	}
@@ -594,19 +601,35 @@ impl Client {
 		}
 	}

-	/// Take a snapshot.
-	pub fn take_snapshot<W: snapshot_io::SnapshotWriter + Send>(&self, writer: W) -> Result<(), ::error::Error> {
-		let db = self.state_db.lock().boxed_clone();
+	/// Take a snapshot at the given block.
+	/// If the ID given is "latest", this will default to 1000 blocks behind.
+	pub fn take_snapshot<W: snapshot_io::SnapshotWriter + Send>(&self, writer: W, at: BlockID, p: &snapshot::Progress) -> Result<(), ::error::Error> {
+		let db = self.state_db.lock().journal_db().boxed_clone();
 		let best_block_number = self.chain_info().best_block_number;
-		let start_block_number = if best_block_number > 1000 {
-			best_block_number - 1000
-		} else {
-			0
-		};
-		let start_hash = self.block_hash(BlockID::Number(start_block_number))
-			.expect("blocks within HISTORY are always stored.");
+		let block_number = try!(self.block_number(at).ok_or(snapshot::Error::InvalidStartingBlock(at)));

-		try!(snapshot::take_snapshot(&self.chain, start_hash, db.as_hashdb(), writer));
+		if best_block_number > HISTORY + block_number && db.is_pruned() {
+			return Err(snapshot::Error::OldBlockPrunedDB.into());
+		}
+
+		let start_hash = match at {
+			BlockID::Latest => {
+				let start_num = if best_block_number > 1000 {
+					best_block_number - 1000
+				} else {
+					0
+				};
+
+				self.block_hash(BlockID::Number(start_num))
+					.expect("blocks within HISTORY are always stored.")
+			}
+			_ => match self.block_hash(at) {
+				Some(hash) => hash,
+				None => return Err(snapshot::Error::InvalidStartingBlock(at).into()),
+			},
+		};
+
+		try!(snapshot::take_snapshot(&self.chain, start_hash, db.as_hashdb(), writer, p));

 		Ok(())
 	}
@@ -784,8 +807,8 @@ impl BlockChainClient for Client {
 		Self::block_hash(&self.chain, id)
 	}

-	fn code(&self, address: &Address) -> Option<Bytes> {
-		self.state().code(address)
+	fn code(&self, address: &Address, id: BlockID) -> Option<Option<Bytes>> {
+		self.state_at(id).map(|s| s.code(address).map(|c| (*c).clone()))
 	}

 	fn balance(&self, address: &Address, id: BlockID) -> Option<U256> {
@@ -862,7 +885,7 @@ impl BlockChainClient for Client {
 	}

 	fn state_data(&self, hash: &H256) -> Option<Bytes> {
-		self.state_db.lock().state(hash)
+		self.state_db.lock().journal_db().state(hash)
 	}

 	fn block_receipts(&self, hash: &H256) -> Option<Bytes> {
@@ -900,6 +923,10 @@ impl BlockChainClient for Client {
 		}
 	}

+	fn additional_params(&self) -> BTreeMap<String, String> {
+		self.engine.additional_params().into_iter().collect()
+	}
+
 	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)),
@@ -1057,6 +1084,8 @@ impl MiningBlockChainClient for Client {
 		let number = block.header().number();

 		let block_data = block.rlp_bytes();
+		// Clear canonical state cache
+		self.state_db.lock().clear_cache();
 		let route = self.commit_block(block, &h, &block_data);
 		trace!(target: "client", "Imported sealed block #{} ({})", number, h);

--- a/ethcore/src/client/test_client.rs
+++ b/ethcore/src/client/test_client.rs
@@ -21,9 +21,11 @@ use util::*;
 use devtools::*;
 use transaction::{Transaction, LocalizedTransaction, SignedTransaction, Action};
 use blockchain::TreeRoute;
-use client::{BlockChainClient, MiningBlockChainClient, BlockChainInfo, BlockStatus, BlockID,
-	TransactionID, UncleID, TraceId, TraceFilter, LastHashes, CallAnalytics,
-	BlockImportError};
+use client::{
+	BlockChainClient, MiningBlockChainClient, BlockChainInfo, BlockStatus, BlockID,
+	TransactionID, UncleID, TraceId, TraceFilter, LastHashes, CallAnalytics, BlockImportError,
+	DB_NO_OF_COLUMNS, DB_COL_STATE,
+};
 use header::{Header as BlockHeader, BlockNumber};
 use filter::Filter;
 use log_entry::LocalizedLogEntry;
@@ -39,6 +41,7 @@ use block::{OpenBlock, SealedBlock};
 use executive::Executed;
 use error::CallError;
 use trace::LocalizedTrace;
+use state_db::StateDB;

 /// Test client.
 pub struct TestBlockChainClient {
@@ -246,27 +249,28 @@ impl TestBlockChainClient {
 	}
 }

-pub fn get_temp_journal_db() -> GuardedTempResult<Box<JournalDB>> {
+pub fn get_temp_state_db() -> GuardedTempResult<StateDB> {
 	let temp = RandomTempPath::new();
-	let db = Database::open_default(temp.as_str()).unwrap();
-	let journal_db = journaldb::new(Arc::new(db), journaldb::Algorithm::EarlyMerge, None);
+	let db = Database::open(&DatabaseConfig::with_columns(DB_NO_OF_COLUMNS), temp.as_str()).unwrap();
+	let journal_db = journaldb::new(Arc::new(db), journaldb::Algorithm::EarlyMerge, DB_COL_STATE);
+	let state_db = StateDB::new(journal_db);
 	GuardedTempResult {
 		_temp: temp,
-		result: Some(journal_db)
+		result: Some(state_db)
 	}
 }

 impl MiningBlockChainClient for TestBlockChainClient {
 	fn prepare_open_block(&self, author: Address, gas_range_target: (U256, U256), extra_data: Bytes) -> OpenBlock {
-		let engine = &self.spec.engine;
+		let engine = &*self.spec.engine;
 		let genesis_header = self.spec.genesis_header();
-		let mut db_result = get_temp_journal_db();
+		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		self.spec.ensure_db_good(db.as_hashdb_mut()).unwrap();
+		self.spec.ensure_db_good(&mut db).unwrap();

 		let last_hashes = vec![genesis_header.hash()];
 		let mut open_block = OpenBlock::new(
-			engine.deref(),
+			engine,
 			self.vm_factory(),
 			Default::default(),
 			false,
@@ -319,8 +323,11 @@ impl BlockChainClient for TestBlockChainClient {
 		self.nonce(address, BlockID::Latest).unwrap()
 	}

-	fn code(&self, address: &Address) -> Option<Bytes> {
-		self.code.read().get(address).cloned()
+	fn code(&self, address: &Address, id: BlockID) -> Option<Option<Bytes>> {
+		match id {
+			BlockID::Latest => Some(self.code.read().get(address).cloned()),
+			_ => None,
+		}
 	}

 	fn balance(&self, address: &Address, id: BlockID) -> Option<U256> {
@@ -344,11 +351,11 @@ impl BlockChainClient for TestBlockChainClient {
 	}

 	fn transaction(&self, _id: TransactionID) -> Option<LocalizedTransaction> {
-		unimplemented!();
+		None
 	}

 	fn uncle(&self, _id: UncleID) -> Option<Bytes> {
-		unimplemented!();
+		None
 	}

 	fn transaction_receipt(&self, id: TransactionID) -> Option<LocalizedReceipt> {
@@ -479,9 +486,9 @@ impl BlockChainClient for TestBlockChainClient {
 		if number == len {
 			{
 				let mut difficulty = self.difficulty.write();
-				*difficulty.deref_mut() = *difficulty.deref() + header.difficulty;
+				*difficulty = *difficulty + header.difficulty;
 			}
-			mem::replace(self.last_hash.write().deref_mut(), h.clone());
+			mem::replace(&mut *self.last_hash.write(), h.clone());
 			self.blocks.write().insert(h.clone(), b);
 			self.numbers.write().insert(number, h.clone());
 			let mut parent_hash = header.parent_hash;
@@ -514,6 +521,10 @@ impl BlockChainClient for TestBlockChainClient {
 	fn clear_queue(&self) {
 	}

+	fn additional_params(&self) -> BTreeMap<String, String> {
+		Default::default()
+	}
+
 	fn chain_info(&self) -> BlockChainInfo {
 		BlockChainInfo {
 			total_difficulty: *self.difficulty.read(),
--- a/ethcore/src/client/traits.rs
+++ b/ethcore/src/client/traits.rs
@@ -14,6 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

+use std::collections::{BTreeMap};
 use util::bytes::Bytes;
 use util::hash::{Address, H256, H2048};
 use util::numbers::U256;
@@ -81,8 +82,14 @@ pub trait BlockChainClient : Sync + Send {
 	/// Get block hash.
 	fn block_hash(&self, id: BlockID) -> Option<H256>;

-	/// Get address code.
-	fn code(&self, address: &Address) -> Option<Bytes>;
+	/// Get address code at given block's state.
+	fn code(&self, address: &Address, id: BlockID) -> Option<Option<Bytes>>;
+
+	/// Get address code at the latest block's state.
+	fn latest_code(&self, address: &Address) -> Option<Bytes> {
+		self.code(address, BlockID::Latest)
+			.expect("code will return Some if given BlockID::Latest; qed")
+	}

 	/// Get address balance at the given block's state.
 	///
@@ -144,6 +151,9 @@ pub trait BlockChainClient : Sync + Send {
 	/// Get blockchain information.
 	fn chain_info(&self) -> BlockChainInfo;

+	/// Get the registrar address, if it exists.
+	fn additional_params(&self) -> BTreeMap<String, String>;
+
 	/// Get the best block header.
 	fn best_block_header(&self) -> Bytes;

--- a/ethcore/src/db.rs
+++ b/ethcore/src/db.rs
@@ -64,6 +64,9 @@ pub trait Writable {
 	/// Writes the value into the database.
 	fn write<T, R>(&self, col: Option<u32>, key: &Key<T, Target = R>, value: &T) where T: Encodable, R: Deref<Target = [u8]>;

+	/// Deletes key from the databse.
+	fn delete<T, R>(&self, col: Option<u32>, key: &Key<T, Target = R>) 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, col: Option<u32>, cache: &mut Cache<K, T>, key: K, value: T, policy: CacheUpdatePolicy) where
 	K: Key<T, Target = R> + Hash + Eq,
@@ -100,6 +103,34 @@ pub trait Writable {
 			},
 		}
 	}
+
+	/// Writes and removes the values into the database and updates the cache.
+	fn extend_with_option_cache<K, T, R>(&self, col: Option<u32>, cache: &mut Cache<K, Option<T>>, values: HashMap<K, Option<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() {
+					match value {
+						Some(ref v) => self.write(col, &key, v),
+						None => self.delete(col, &key),
+					}
+					cache.insert(key, value);
+				}
+			},
+			CacheUpdatePolicy::Remove => {
+				for (key, value) in values.into_iter() {
+					match value {
+						Some(v) => self.write(col, &key, &v),
+						None => self.delete(col, &key),
+					}
+					cache.remove(&key);
+				}
+			},
+		}
+	}
+
 }

 /// Should be used to read values from database.
@@ -154,6 +185,13 @@ impl Writable for DBTransaction {
 			panic!("db put failed, key: {:?}, err: {:?}", &key.key() as &[u8], err);
 		}
 	}
+
+	fn delete<T, R>(&self, col: Option<u32>, key: &Key<T, Target = R>) where T: Encodable, R: Deref<Target = [u8]> {
+		let result = DBTransaction::delete(self, col, &key.key());
+		if let Err(err) = result {
+			panic!("db delete failed, key: {:?}, err: {:?}", &key.key() as &[u8], err);
+		}
+	}
 }

 impl Readable for Database {
--- a/ethcore/src/engines/basic_authority.rs
+++ b/ethcore/src/engines/basic_authority.rs
@@ -246,16 +246,16 @@ mod tests {
 		tap.unlock_account_permanently(addr, "".into()).unwrap();

 		let spec = new_test_authority();
-		let engine = &spec.engine;
+		let engine = &*spec.engine;
 		let genesis_header = spec.genesis_header();
-		let mut db_result = get_temp_journal_db();
+		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(db.as_hashdb_mut()).unwrap();
+		spec.ensure_db_good(&mut db).unwrap();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, addr, (3141562.into(), 31415620.into()), vec![]).unwrap();
+		let b = OpenBlock::new(engine, &vm_factory, Default::default(), 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());
+		assert!(b.try_seal(engine, seal).is_ok());
 	}
 }
--- a/ethcore/src/engines/instant_seal.rs
+++ b/ethcore/src/engines/instant_seal.rs
@@ -80,18 +80,18 @@ mod tests {
 		let addr = tap.insert_account("".sha3(), "").unwrap();

 		let spec = new_test_instant();
-		let engine = &spec.engine;
+		let engine = &*spec.engine;
 		let genesis_header = spec.genesis_header();
-		let mut db_result = get_temp_journal_db();
+		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(db.as_hashdb_mut()).unwrap();
+		spec.ensure_db_good(&mut db).unwrap();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, addr, (3141562.into(), 31415620.into()), vec![]).unwrap();
+		let b = OpenBlock::new(engine, &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, addr, (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let b = b.close_and_lock();
 		// Seal with empty AccountProvider.
 		let seal = engine.generate_seal(b.block(), Some(&tap)).unwrap();
-		assert!(b.try_seal(engine.deref(), seal).is_ok());
+		assert!(b.try_seal(engine, seal).is_ok());
 	}

 	#[test]
--- a/ethcore/src/engines/mod.rs
+++ b/ethcore/src/engines/mod.rs
@@ -44,6 +44,9 @@ pub trait Engine : Sync + Send {
 	/// Additional engine-specific information for the user/developer concerning `header`.
 	fn extra_info(&self, _header: &Header) -> HashMap<String, String> { HashMap::new() }

+	/// Additional information.
+	fn additional_params(&self) -> HashMap<String, String> { HashMap::new() } 
+
 	/// Get the general parameters of the chain.
 	fn params(&self) -> &CommonParams;

--- a/ethcore/src/ethereum/ethash.rs
+++ b/ethcore/src/ethereum/ethash.rs
@@ -92,6 +92,7 @@ impl Engine for Ethash {
 	fn seal_fields(&self) -> usize { 2 }

 	fn params(&self) -> &CommonParams { &self.params }
+	fn additional_params(&self) -> HashMap<String, String> { hash_map!["registrar".to_owned() => self.ethash_params.registrar.hex()] }

 	fn builtins(&self) -> &BTreeMap<Address, Builtin> {
 		&self.builtins
@@ -350,14 +351,14 @@ mod tests {
 	#[test]
 	fn on_close_block() {
 		let spec = new_morden();
-		let engine = &spec.engine;
+		let engine = &*spec.engine;
 		let genesis_header = spec.genesis_header();
-		let mut db_result = get_temp_journal_db();
+		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(db.as_hashdb_mut()).unwrap();
+		spec.ensure_db_good(&mut db).unwrap();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
+		let b = OpenBlock::new(engine, &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let b = b.close();
 		assert_eq!(b.state().balance(&Address::zero()), U256::from_str("4563918244f40000").unwrap());
 	}
@@ -365,14 +366,14 @@ mod tests {
 	#[test]
 	fn on_close_block_with_uncle() {
 		let spec = new_morden();
-		let engine = &spec.engine;
+		let engine = &*spec.engine;
 		let genesis_header = spec.genesis_header();
-		let mut db_result = get_temp_journal_db();
+		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(db.as_hashdb_mut()).unwrap();
+		spec.ensure_db_good(&mut db).unwrap();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
 		let vm_factory = Default::default();
-		let mut b = OpenBlock::new(engine.deref(), &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
+		let mut b = OpenBlock::new(engine, &vm_factory, Default::default(), false, db, &genesis_header, last_hashes, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let mut uncle = Header::new();
 		let uncle_author = address_from_hex("ef2d6d194084c2de36e0dabfce45d046b37d1106");
 		uncle.author = uncle_author.clone();
--- a/ethcore/src/ethereum/mod.rs
+++ b/ethcore/src/ethereum/mod.rs
@@ -65,9 +65,9 @@ mod tests {
 		let spec = new_morden();
 		let engine = &spec.engine;
 		let genesis_header = spec.genesis_header();
-		let mut db_result = get_temp_journal_db();
+		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(db.as_hashdb_mut()).unwrap();
+		spec.ensure_db_good(&mut db).unwrap();
 		let s = State::from_existing(db, genesis_header.state_root.clone(), engine.account_start_nonce(), Default::default()).unwrap();
 		assert_eq!(s.balance(&address_from_hex("0000000000000000000000000000000000000001")), U256::from(1u64));
 		assert_eq!(s.balance(&address_from_hex("0000000000000000000000000000000000000002")), U256::from(1u64));
--- a/ethcore/src/evm/evm.rs
+++ b/ethcore/src/evm/evm.rs
@@ -151,10 +151,14 @@ impl CostType for usize {
 	}

 	fn from_u256(val: U256) -> Result<Self> {
-		if U256::from(val.low_u64()) != val {
+		let res = val.low_u64() as usize;
+
+		// validate if value fits into usize
+		if U256::from(res) != val {
 			return Err(Error::OutOfGas);
 		}
-		Ok(val.low_u64() as usize)
+
+		Ok(res)
 	}

 	fn as_usize(&self) -> usize {
@@ -191,6 +195,7 @@ pub trait Evm {


 #[test]
+#[cfg(test)]
 fn should_calculate_overflow_mul_shr_without_overflow() {
 	// given
 	let num = 1048576;
@@ -207,6 +212,7 @@ fn should_calculate_overflow_mul_shr_without_overflow() {
 }

 #[test]
+#[cfg(test)]
 fn should_calculate_overflow_mul_shr_with_overflow() {
 	// given
 	let max = ::std::u64::MAX;
@@ -225,3 +231,15 @@ fn should_calculate_overflow_mul_shr_with_overflow() {
 	assert!(o1);
 }

+#[test]
+#[cfg(test)]
+fn should_validate_u256_to_usize_conversion() {
+	// given
+	let v = U256::from(::std::usize::MAX) + U256::from(1);
+
+	// when
+	let res = usize::from_u256(v);
+
+	// then
+	assert!(res.is_err());
+}
--- a/ethcore/src/evm/ext.rs
+++ b/ethcore/src/evm/ext.rs
@@ -81,7 +81,10 @@ pub trait Ext {
 	) -> MessageCallResult;

 	/// Returns code at given address
-	fn extcode(&self, address: &Address) -> Bytes;
+	fn extcode(&self, address: &Address) -> Arc<Bytes>;
+
+	/// Returns code length in bytes at given address
+	fn extcode_len(&self, address: &Address) -> u64;

 	/// Creates log entry with given topics and data
 	fn log(&mut self, topics: Vec<H256>, data: &[u8]);
--- a/ethcore/src/evm/factory.rs
+++ b/ethcore/src/evm/factory.rs
@@ -18,8 +18,10 @@
 //!
 //! TODO: consider spliting it into two separate files.
 use std::fmt;
+use std::sync::Arc;
 use evm::Evm;
 use util::{U256, Uint};
+use super::interpreter::SharedCache;

 #[derive(Debug, PartialEq, Clone)]
 /// Type of EVM to use.
@@ -81,7 +83,8 @@ impl VMType {

 /// Evm factory. Creates appropriate Evm.
 pub struct Factory {
-	evm: VMType
+	evm: VMType,
+	evm_cache: Arc<SharedCache>,
 }

 impl Factory {
@@ -94,9 +97,9 @@ impl Factory {
 				Box::new(super::jit::JitEvm::default())
 			},
 			VMType::Interpreter => if Self::can_fit_in_usize(gas) {
-				Box::new(super::interpreter::Interpreter::<usize>::default())
+				Box::new(super::interpreter::Interpreter::<usize>::new(self.evm_cache.clone()))
 			} else {
-				Box::new(super::interpreter::Interpreter::<U256>::default())
+				Box::new(super::interpreter::Interpreter::<U256>::new(self.evm_cache.clone()))
 			}
 		}
 	}
@@ -107,9 +110,9 @@ impl Factory {
 	pub fn create(&self, gas: U256) -> Box<Evm> {
 		match self.evm {
 			VMType::Interpreter => if Self::can_fit_in_usize(gas) {
-				Box::new(super::interpreter::Interpreter::<usize>::default())
+				Box::new(super::interpreter::Interpreter::<usize>::new(self.evm_cache.clone()))
 			} else {
-				Box::new(super::interpreter::Interpreter::<U256>::default())
+				Box::new(super::interpreter::Interpreter::<U256>::new(self.evm_cache.clone()))
 			}
 		}
 	}
@@ -117,7 +120,8 @@ impl Factory {
 	/// Create new instance of specific `VMType` factory
 	pub fn new(evm: VMType) -> Self {
 		Factory {
-			evm: evm
+			evm: evm,
+			evm_cache: Arc::new(SharedCache::default()),
 		}
 	}

@@ -131,7 +135,8 @@ impl Default for Factory {
 	#[cfg(feature = "jit")]
 	fn default() -> Factory {
 		Factory {
-			evm: VMType::Jit
+			evm: VMType::Jit,
+			evm_cache: Arc::new(SharedCache::default()),
 		}
 	}

@@ -139,7 +144,8 @@ impl Default for Factory {
 	#[cfg(not(feature = "jit"))]
 	fn default() -> Factory {
 		Factory {
-			evm: VMType::Interpreter
+			evm: VMType::Interpreter,
+			evm_cache: Arc::new(SharedCache::default()),
 		}
 	}
 }
--- a/ethcore/src/evm/interpreter/mod.rs
+++ b/ethcore/src/evm/interpreter/mod.rs
@@ -31,10 +31,12 @@ macro_rules! evm_debug {
 mod gasometer;
 mod stack;
 mod memory;
+mod shared_cache;

 use self::gasometer::Gasometer;
 use self::stack::{Stack, VecStack};
 use self::memory::Memory;
+pub use self::shared_cache::SharedCache;

 use std::marker::PhantomData;
 use common::*;
@@ -53,6 +55,17 @@ fn color(instruction: Instruction, name: &'static str) -> String {
 type CodePosition = usize;
 type ProgramCounter = usize;

+const ONE: U256 = U256([1, 0, 0, 0]);
+const TWO: U256 = U256([2, 0, 0, 0]);
+const TWO_POW_5: U256 = U256([0x20, 0, 0, 0]);
+const TWO_POW_8: U256 = U256([0x100, 0, 0, 0]);
+const TWO_POW_16: U256 = U256([0x10000, 0, 0, 0]);
+const TWO_POW_24: U256 = U256([0x1000000, 0, 0, 0]);
+const TWO_POW_64: U256 = U256([0, 0x1, 0, 0]); // 0x1 00000000 00000000
+const TWO_POW_96: U256 = U256([0, 0x100000000, 0, 0]); //0x1 00000000 00000000 00000000
+const TWO_POW_224: U256 = U256([0, 0, 0, 0x100000000]); //0x1 00000000 00000000 00000000 00000000 00000000 00000000 00000000
+const TWO_POW_248: U256 = U256([0, 0, 0, 0x100000000000000]); //0x1 00000000 00000000 00000000 00000000 00000000 00000000 00000000 000000
+
 /// Abstraction over raw vector of Bytes. Easier state management of PC.
 struct CodeReader<'a> {
 	position: ProgramCounter,
@@ -87,9 +100,9 @@ enum InstructionResult<Gas> {


 /// Intepreter EVM implementation
-#[derive(Default)]
 pub struct Interpreter<Cost: CostType> {
 	mem: Vec<u8>,
+	cache: Arc<SharedCache>,
 	_type: PhantomData<Cost>,
 }

@@ -98,7 +111,7 @@ impl<Cost: CostType> evm::Evm for Interpreter<Cost> {
 		self.mem.clear();

 		let code = &params.code.as_ref().unwrap();
-		let valid_jump_destinations = self.find_jump_destinations(code);
+		let valid_jump_destinations = self.cache.jump_destinations(&params.code_hash, code);

 		let mut gasometer = Gasometer::<Cost>::new(try!(Cost::from_u256(params.gas)));
 		let mut stack = VecStack::with_capacity(ext.schedule().stack_limit, U256::zero());
@@ -177,6 +190,14 @@ impl<Cost: CostType> evm::Evm for Interpreter<Cost> {
 }

 impl<Cost: CostType> Interpreter<Cost> {
+	/// Create a new `Interpreter` instance with shared cache.
+	pub fn new(cache: Arc<SharedCache>) -> Interpreter<Cost> {
+		Interpreter {
+			mem: Vec::new(),
+			cache: cache,
+			_type: PhantomData::default(),
+		}
+	}

 	fn verify_instruction(&self, ext: &evm::Ext, instruction: Instruction, info: &InstructionInfo, stack: &Stack<U256>) -> evm::Result<()> {
 		let schedule = ext.schedule();
@@ -471,14 +492,14 @@ impl<Cost: CostType> Interpreter<Cost> {
 			},
 			instructions::EXTCODESIZE => {
 				let address = u256_to_address(&stack.pop_back());
-				let len = ext.extcode(&address).len();
+				let len = ext.extcode_len(&address);
 				stack.push(U256::from(len));
 			},
 			instructions::CALLDATACOPY => {
-				self.copy_data_to_memory(stack, &params.data.clone().unwrap_or_else(|| vec![]));
+				self.copy_data_to_memory(stack, params.data.as_ref().map_or_else(|| &[] as &[u8], |d| &*d as &[u8]));
 			},
 			instructions::CODECOPY => {
-				self.copy_data_to_memory(stack, &params.code.clone().unwrap_or_else(|| vec![]));
+				self.copy_data_to_memory(stack, params.code.as_ref().map_or_else(|| &[] as &[u8], |c| &**c as &[u8]));
 			},
 			instructions::EXTCODECOPY => {
 				let address = u256_to_address(&stack.pop_back());
@@ -515,11 +536,11 @@ impl<Cost: CostType> Interpreter<Cost> {
 		Ok(InstructionResult::Ok)
 	}

-	fn copy_data_to_memory(&mut self, stack: &mut Stack<U256>, data: &[u8]) {
+	fn copy_data_to_memory(&mut self, stack: &mut Stack<U256>, source: &[u8]) {
 		let dest_offset = stack.pop_back();
 		let source_offset = stack.pop_back();
 		let size = stack.pop_back();
-		let source_size = U256::from(data.len());
+		let source_size = U256::from(source.len());

 		let output_end = match source_offset > source_size || size > source_size || source_offset + size > source_size {
 			true => {
@@ -531,14 +552,14 @@ impl<Cost: CostType> Interpreter<Cost> {
 				for i in zero_slice.iter_mut() {
 					*i = 0;
 				}
-				data.len()
+				source.len()
 			},
 			false => (size.low_u64() + source_offset.low_u64()) as usize
 		};

 		if source_offset < source_size {
 			let output_begin = source_offset.low_u64() as usize;
-			self.mem.write_slice(dest_offset, &data[output_begin..output_end]);
+			self.mem.write_slice(dest_offset, &source[output_begin..output_end]);
 		}
 	}

@@ -599,7 +620,19 @@ impl<Cost: CostType> Interpreter<Cost> {
 				let a = stack.pop_back();
 				let b = stack.pop_back();
 				stack.push(if !self.is_zero(&b) {
-					a.overflowing_div(b).0
+					match b {
+						ONE => a,
+						TWO => a >> 1,
+						TWO_POW_5 => a >> 5,
+						TWO_POW_8 => a >> 8,
+						TWO_POW_16 => a >> 16,
+						TWO_POW_24 => a >> 24,
+						TWO_POW_64 => a >> 64,
+						TWO_POW_96 => a >> 96,
+						TWO_POW_224 => a >> 224,
+						TWO_POW_248 => a >> 248,
+						_ => a.overflowing_div(b).0,
+					}
 				} else {
 					U256::zero()
 				});
@@ -767,23 +800,6 @@ impl<Cost: CostType> Interpreter<Cost> {
 		Ok(())
 	}

-	fn find_jump_destinations(&self, code: &[u8]) -> BitSet {
-		let mut jump_dests = BitSet::with_capacity(code.len());
-		let mut position = 0;
-
-		while position < code.len() {
-			let instruction = code[position];
-
-			if instruction == instructions::JUMPDEST {
-				jump_dests.insert(position);
-			} else if instructions::is_push(instruction) {
-				position += instructions::get_push_bytes(instruction);
-			}
-			position += 1;
-		}
-
-		jump_dests
-	}
 }

 fn get_and_reset_sign(value: U256) -> (U256, bool) {
@@ -810,15 +826,3 @@ fn address_to_u256(value: Address) -> U256 {
 	U256::from(H256::from(value).as_slice())
 }

-#[test]
-fn test_find_jump_destinations() {
-	// given
-	let interpreter = Interpreter::<U256>::default();
-	let code = "7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff5b01600055".from_hex().unwrap();
-
-	// when
-	let valid_jump_destinations = interpreter.find_jump_destinations(&code);
-
-	// then
-	assert!(valid_jump_destinations.contains(66));
-}
--- a/ethcore/src/evm/interpreter/shared_cache.rs
+++ b/ethcore/src/evm/interpreter/shared_cache.rs
@@ -0,0 +1,84 @@
+// 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 lru_cache::LruCache;
+use util::{H256, Mutex};
+use util::sha3::*;
+use bit_set::BitSet;
+use super::super::instructions;
+
+const CACHE_CODE_ITEMS: usize = 4096;
+
+/// GLobal cache for EVM interpreter
+pub struct SharedCache {
+	jump_destinations: Mutex<LruCache<H256, Arc<BitSet>>>
+}
+
+impl SharedCache {
+	/// Get jump destincations bitmap for a contract.
+	pub fn jump_destinations(&self, code_hash: &H256, code: &[u8]) -> Arc<BitSet> {
+		if code_hash == &SHA3_EMPTY {
+			return Self::find_jump_destinations(code);
+		}
+		if let Some(d) = self.jump_destinations.lock().get_mut(code_hash) {
+			return d.clone();
+		}
+
+		let d = Self::find_jump_destinations(code);
+		self.jump_destinations.lock().insert(code_hash.clone(), d.clone());
+		d
+	}
+
+	fn find_jump_destinations(code: &[u8]) -> Arc<BitSet> {
+		let mut jump_dests = BitSet::with_capacity(code.len());
+		let mut position = 0;
+
+		while position < code.len() {
+			let instruction = code[position];
+
+			if instruction == instructions::JUMPDEST {
+				jump_dests.insert(position);
+			} else if instructions::is_push(instruction) {
+				position += instructions::get_push_bytes(instruction);
+			}
+			position += 1;
+		}
+		Arc::new(jump_dests)
+	}
+}
+
+impl Default for SharedCache {
+	fn default() -> SharedCache {
+		SharedCache {
+			jump_destinations: Mutex::new(LruCache::new(CACHE_CODE_ITEMS)),
+		}
+	}
+}
+
+
+#[test]
+fn test_find_jump_destinations() {
+	use util::FromHex;
+	// given
+	let code = "7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff5b01600055".from_hex().unwrap();
+
+	// when
+	let valid_jump_destinations = SharedCache::find_jump_destinations(&code);
+
+	// then
+	assert!(valid_jump_destinations.contains(66));
+}
--- a/ethcore/src/evm/jit.rs
+++ b/ethcore/src/evm/jit.rs
@@ -18,6 +18,7 @@
 use common::*;
 use evmjit;
 use evm::{self, GasLeft};
+use types::executed::CallType;

 /// Should be used to convert jit types to ethcore
 trait FromJit<T>: Sized {
@@ -77,10 +78,11 @@ impl IntoJit<evmjit::I256> for U256 {
 impl IntoJit<evmjit::I256> for H256 {
 	fn into_jit(self) -> evmjit::I256 {
 		let mut ret = [0; 4];
-		for i in 0..self.bytes().len() {
-			let rev = self.bytes().len() - 1 - i;
+		let len = self.len();
+		for i in 0..len {
+			let rev = len - 1 - i;
 			let pos = rev / 8;
-			ret[pos] += (self.bytes()[i] as u64) << ((rev % 8) * 8);
+			ret[pos] += (self[i] as u64) << ((rev % 8) * 8);
 		}
 		evmjit::I256 { words: ret }
 	}
@@ -194,6 +196,7 @@ impl<'a> evmjit::Ext for ExtAdapter<'a> {
 				receive_address: *const evmjit::H256,
 				code_address: *const evmjit::H256,
 				transfer_value: *const evmjit::I256,
+				// Ignoring apparent value - it's handled correctly in executive.
 				_apparent_value: *const evmjit::I256,
 				in_beg: *const u8,
 				in_size: u64,
@@ -207,10 +210,12 @@ impl<'a> evmjit::Ext for ExtAdapter<'a> {
 		let receive_address = unsafe { Address::from_jit(&*receive_address) };
 		let code_address = unsafe { Address::from_jit(&*code_address) };
 		let transfer_value = unsafe { U256::from_jit(&*transfer_value) };
-		let value = Some(transfer_value);

 		// receive address and code address are the same in normal calls
 		let is_callcode = receive_address != code_address;
+		let is_delegatecall = is_callcode && sender_address != receive_address;
+
+		let value = if is_delegatecall { None } else { Some(transfer_value) };

 		if !is_callcode && !self.ext.exists(&code_address) {
 			gas_cost = gas_cost + U256::from(self.ext.schedule().call_new_account_gas);
@@ -239,6 +244,12 @@ impl<'a> evmjit::Ext for ExtAdapter<'a> {
 			}
 		}

+		let call_type = match (is_callcode, is_delegatecall) {
+			(_, true) => CallType::DelegateCall,
+			(true, false) => CallType::CallCode,
+			(false, false) => CallType::Call,
+		};
+
 		match self.ext.call(
 					  &call_gas,
 					  &sender_address,
@@ -246,7 +257,9 @@ impl<'a> evmjit::Ext for ExtAdapter<'a> {
 					  value,
 					  unsafe { slice::from_raw_parts(in_beg, in_size as usize) },
 					  &code_address,
-					  unsafe { slice::from_raw_parts_mut(out_beg, out_size as usize) }) {
+					  unsafe { slice::from_raw_parts_mut(out_beg, out_size as usize) },
+					  call_type,
+					  ) {
 			evm::MessageCallResult::Success(gas_left) => unsafe {
 				*io_gas = (gas + gas_left).low_u64();
 				true
--- a/ethcore/src/evm/tests.rs
+++ b/ethcore/src/evm/tests.rs
@@ -49,7 +49,7 @@ pub struct FakeExt {
 	depth: usize,
 	store: HashMap<H256, H256>,
 	blockhashes: HashMap<U256, H256>,
-	codes: HashMap<Address, Bytes>,
+	codes: HashMap<Address, Arc<Bytes>>,
 	logs: Vec<FakeLogEntry>,
 	_suicides: HashSet<Address>,
 	info: EnvInfo,
@@ -136,8 +136,12 @@ impl Ext for FakeExt {
 		MessageCallResult::Success(*gas)
 	}

-	fn extcode(&self, address: &Address) -> Bytes {
-		self.codes.get(address).unwrap_or(&Bytes::new()).clone()
+	fn extcode(&self, address: &Address) -> Arc<Bytes> {
+		self.codes.get(address).unwrap_or(&Arc::new(Bytes::new())).clone()
+	}
+
+	fn extcode_len(&self, address: &Address) -> u64 {
+		self.codes.get(address).map_or(0, |c| c.len() as u64)
 	}

 	fn log(&mut self, topics: Vec<H256>, data: &[u8]) {
@@ -180,11 +184,11 @@ fn test_stack_underflow() {
 	let mut params = ActionParams::default();
 	params.address = address.clone();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let err = {
-		let mut vm : Box<evm::Evm> = Box::new(super::interpreter::Interpreter::<usize>::default());
+		let mut vm : Box<evm::Evm> = Box::new(super::interpreter::Interpreter::<usize>::new(Arc::new(super::interpreter::SharedCache::default())));
 		test_finalize(vm.exec(params, &mut ext)).unwrap_err()
 	};

@@ -207,7 +211,7 @@ fn test_add(factory: super::Factory) {
 	let mut params = ActionParams::default();
 	params.address = address.clone();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -227,7 +231,7 @@ fn test_sha3(factory: super::Factory) {
 	let mut params = ActionParams::default();
 	params.address = address.clone();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -247,7 +251,7 @@ fn test_address(factory: super::Factory) {
 	let mut params = ActionParams::default();
 	params.address = address.clone();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -269,7 +273,7 @@ fn test_origin(factory: super::Factory) {
 	params.address = address.clone();
 	params.origin = origin.clone();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -291,7 +295,7 @@ fn test_sender(factory: super::Factory) {
 	params.address = address.clone();
 	params.sender = sender.clone();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -325,9 +329,9 @@ fn test_extcodecopy(factory: super::Factory) {
 	params.address = address.clone();
 	params.sender = sender.clone();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();
-	ext.codes.insert(sender, sender_code);
+	ext.codes.insert(sender, Arc::new(sender_code));

 	let gas_left = {
 		let mut vm = factory.create(params.gas);
@@ -346,7 +350,7 @@ fn test_log_empty(factory: super::Factory) {
 	let mut params = ActionParams::default();
 	params.address = address.clone();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -378,7 +382,7 @@ fn test_log_sender(factory: super::Factory) {
 	params.address = address.clone();
 	params.sender = sender.clone();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -402,7 +406,7 @@ fn test_blockhash(factory: super::Factory) {
 	let mut params = ActionParams::default();
 	params.address = address.clone();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();
 	ext.blockhashes.insert(U256::zero(), blockhash.clone());

@@ -424,7 +428,7 @@ fn test_calldataload(factory: super::Factory) {
 	let mut params = ActionParams::default();
 	params.address = address.clone();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	params.data = Some(data);
 	let mut ext = FakeExt::new();

@@ -445,7 +449,7 @@ fn test_author(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();
 	ext.info.author = author;

@@ -465,7 +469,7 @@ fn test_timestamp(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();
 	ext.info.timestamp = timestamp;

@@ -485,7 +489,7 @@ fn test_number(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();
 	ext.info.number = number;

@@ -505,7 +509,7 @@ fn test_difficulty(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();
 	ext.info.difficulty = difficulty;

@@ -525,7 +529,7 @@ fn test_gas_limit(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();
 	ext.info.gas_limit = gas_limit;

@@ -544,7 +548,7 @@ fn test_mul(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -562,7 +566,7 @@ fn test_sub(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -580,7 +584,7 @@ fn test_div(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -598,7 +602,7 @@ fn test_div_zero(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -616,7 +620,7 @@ fn test_mod(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -635,7 +639,7 @@ fn test_smod(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -654,7 +658,7 @@ fn test_sdiv(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -673,7 +677,7 @@ fn test_exp(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -693,7 +697,7 @@ fn test_comparison(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -714,7 +718,7 @@ fn test_signed_comparison(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -735,7 +739,7 @@ fn test_bitops(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(150_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -758,7 +762,7 @@ fn test_addmod_mulmod(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -779,7 +783,7 @@ fn test_byte(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -798,7 +802,7 @@ fn test_signextend(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -818,7 +822,7 @@ fn test_badinstruction_int() {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let err = {
@@ -838,7 +842,7 @@ fn test_pop(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(100_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -858,7 +862,7 @@ fn test_extops(factory: super::Factory) {
 	params.gas = U256::from(150_000);
 	params.gas_price = U256::from(0x32);
 	params.value = ActionValue::Transfer(U256::from(0x99));
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -881,7 +885,7 @@ fn test_jumps(factory: super::Factory) {

 	let mut params = ActionParams::default();
 	params.gas = U256::from(150_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	let mut ext = FakeExt::new();

 	let gas_left = {
@@ -904,7 +908,7 @@ fn test_calls(factory: super::Factory) {
 	let code_address = Address::from(0x998);
 	let mut params = ActionParams::default();
 	params.gas = U256::from(150_000);
-	params.code = Some(code);
+	params.code = Some(Arc::new(code));
 	params.address = address.clone();
 	let mut ext = FakeExt::new();
 	ext.balances = {
--- a/ethcore/src/executive.rs
+++ b/ethcore/src/executive.rs
@@ -167,13 +167,14 @@ impl<'a> Executive<'a> {
 				let new_address = contract_address(&sender, &nonce);
 				let params = ActionParams {
 					code_address: new_address.clone(),
+					code_hash: t.data.sha3(),
 					address: new_address,
 					sender: sender.clone(),
 					origin: sender.clone(),
 					gas: init_gas,
 					gas_price: t.gas_price,
 					value: ActionValue::Transfer(t.value),
-					code: Some(t.data.clone()),
+					code: Some(Arc::new(t.data.clone())),
 					data: None,
 					call_type: CallType::None,
 				};
@@ -189,6 +190,7 @@ impl<'a> Executive<'a> {
 					gas_price: t.gas_price,
 					value: ActionValue::Transfer(t.value),
 					code: self.state.code(address),
+					code_hash: self.state.code_hash(address),
 					data: Some(t.data.clone()),
 					call_type: CallType::Call,
 				};
@@ -510,7 +512,7 @@ mod tests {
 		params.address = address.clone();
 		params.sender = sender.clone();
 		params.gas = U256::from(100_000);
-		params.code = Some("3331600055".from_hex().unwrap());
+		params.code = Some(Arc::new("3331600055".from_hex().unwrap()));
 		params.value = ActionValue::Transfer(U256::from(0x7));
 		let mut state_result = get_temp_state();
 		let mut state = state_result.reference_mut();
@@ -569,7 +571,7 @@ mod tests {
 		params.sender = sender.clone();
 		params.origin = sender.clone();
 		params.gas = U256::from(100_000);
-		params.code = Some(code.clone());
+		params.code = Some(Arc::new(code));
 		params.value = ActionValue::Transfer(U256::from(100));
 		let mut state_result = get_temp_state();
 		let mut state = state_result.reference_mut();
@@ -624,7 +626,7 @@ mod tests {
 		params.sender = sender.clone();
 		params.origin = sender.clone();
 		params.gas = U256::from(100_000);
-		params.code = Some(code.clone());
+		params.code = Some(Arc::new(code));
 		params.value = ActionValue::Transfer(U256::from(100));
 		params.call_type = CallType::Call;
 		let mut state_result = get_temp_state();
@@ -734,7 +736,7 @@ mod tests {
 		params.sender = sender.clone();
 		params.origin = sender.clone();
 		params.gas = U256::from(100_000);
-		params.code = Some(code.clone());
+		params.code = Some(Arc::new(code));
 		params.value = ActionValue::Transfer(100.into());
 		let mut state_result = get_temp_state();
 		let mut state = state_result.reference_mut();
@@ -822,7 +824,7 @@ mod tests {
 		params.sender = sender.clone();
 		params.origin = sender.clone();
 		params.gas = U256::from(100_000);
-		params.code = Some(code.clone());
+		params.code = Some(Arc::new(code));
 		params.value = ActionValue::Transfer(U256::from(100));
 		let mut state_result = get_temp_state();
 		let mut state = state_result.reference_mut();
@@ -874,7 +876,7 @@ mod tests {
 		params.sender = sender.clone();
 		params.origin = sender.clone();
 		params.gas = U256::from(100_000);
-		params.code = Some(code.clone());
+		params.code = Some(Arc::new(code));
 		params.value = ActionValue::Transfer(U256::from(100));
 		let mut state_result = get_temp_state();
 		let mut state = state_result.reference_mut();
@@ -931,7 +933,7 @@ mod tests {
 		params.address = address_a.clone();
 		params.sender = sender.clone();
 		params.gas = U256::from(100_000);
-		params.code = Some(code_a.clone());
+		params.code = Some(Arc::new(code_a.clone()));
 		params.value = ActionValue::Transfer(U256::from(100_000));

 		let mut state_result = get_temp_state();
@@ -981,10 +983,10 @@ mod tests {
 		let mut params = ActionParams::default();
 		params.address = address.clone();
 		params.gas = U256::from(100_000);
-		params.code = Some(code.clone());
+		params.code = Some(Arc::new(code.clone()));
 		let mut state_result = get_temp_state();
 		let mut state = state_result.reference_mut();
-		state.init_code(&address, code.clone());
+		state.init_code(&address, code);
 		let info = EnvInfo::default();
 		let engine = TestEngine::new(0);
 		let mut substate = Substate::new();
@@ -1182,7 +1184,7 @@ mod tests {
 		params.sender = sender.clone();
 		params.origin = sender.clone();
 		params.gas = U256::from(0x0186a0);
-		params.code = Some(code.clone());
+		params.code = Some(Arc::new(code));
 		params.value = ActionValue::Transfer(U256::from_str("0de0b6b3a7640000").unwrap());
 		let mut state_result = get_temp_state();
 		let mut state = state_result.reference_mut();
--- a/ethcore/src/externalities.rs
+++ b/ethcore/src/externalities.rs
@@ -147,7 +147,8 @@ impl<'a, T, V> Ext for Externalities<'a, T, V> where T: 'a + Tracer, V: 'a + VMT
 			gas: *gas,
 			gas_price: self.origin_info.gas_price,
 			value: ActionValue::Transfer(*value),
-			code: Some(code.to_vec()),
+			code: Some(Arc::new(code.to_vec())),
+			code_hash: code.sha3(),
 			data: None,
 			call_type: CallType::None,
 		};
@@ -186,6 +187,7 @@ impl<'a, T, V> Ext for Externalities<'a, T, V> where T: 'a + Tracer, V: 'a + VMT
 			gas: *gas,
 			gas_price: self.origin_info.gas_price,
 			code: self.state.code(code_address),
+			code_hash: self.state.code_hash(code_address),
 			data: Some(data.to_vec()),
 			call_type: call_type,
 		};
@@ -202,8 +204,12 @@ impl<'a, T, V> Ext for Externalities<'a, T, V> where T: 'a + Tracer, V: 'a + VMT
 		}
 	}

-	fn extcode(&self, address: &Address) -> Bytes {
-		self.state.code(address).unwrap_or_else(|| vec![])
+	fn extcode(&self, address: &Address) -> Arc<Bytes> {
+		self.state.code(address).unwrap_or_else(|| Arc::new(vec![]))
+	}
+
+	fn extcode_len(&self, address: &Address) -> u64 {
+		self.state.code_size(address).unwrap_or(0)
 	}

 	#[cfg_attr(feature="dev", allow(match_ref_pats))]
--- a/ethcore/src/json_tests/executive.rs
+++ b/ethcore/src/json_tests/executive.rs
@@ -128,10 +128,14 @@ impl<'a, T, V> Ext for TestExt<'a, T, V> where T: Tracer, V: VMTracer {
 		MessageCallResult::Success(*gas)
 	}

-	fn extcode(&self, address: &Address) -> Bytes  {
+	fn extcode(&self, address: &Address) -> Arc<Bytes>  {
 		self.ext.extcode(address)
 	}

+	fn extcode_len(&self, address: &Address) -> u64  {
+		self.ext.extcode_len(address)
+	}
+
 	fn log(&mut self, topics: Vec<H256>, data: &[u8]) {
 		self.ext.log(topics, data)
 	}
@@ -229,7 +233,7 @@ fn do_json_test_for(vm_type: &VMType, json_data: &[u8]) -> Vec<String> {
 				for (address, account) in vm.post_state.unwrap().into_iter() {
 					let address = address.into();
 					let code: Vec<u8> = account.code.into();
-					fail_unless(state.code(&address).unwrap_or_else(Vec::new) == code, "code is incorrect");
+					fail_unless(state.code(&address).as_ref().map_or_else(|| code.is_empty(), |c| &**c == &code), "code is incorrect");
 					fail_unless(state.balance(&address) == account.balance.into(), "balance is incorrect");
 					fail_unless(state.nonce(&address) == account.nonce.into(), "nonce is incorrect");
 					account.storage.into_iter().foreach(|(k, v)| {
--- a/ethcore/src/json_tests/state.rs
+++ b/ethcore/src/json_tests/state.rs
@@ -65,7 +65,7 @@ pub fn json_chain_test(json_data: &[u8], era: ChainEra) -> Vec<String> {
 				state.commit()
 					.expect(&format!("State test {} failed due to internal error.", name));
 				let vm_factory = Default::default();
-				let res = state.apply(&env, engine.deref(), &vm_factory, &transaction, false);
+				let res = state.apply(&env, &*engine, &vm_factory, &transaction, false);

 				if fail_unless(state.root() == &post_state_root) {
 					println!("!!! {}: State mismatch (got: {}, expect: {}):", name, state.root(), post_state_root);
--- a/ethcore/src/lib.rs
+++ b/ethcore/src/lib.rs
@@ -26,6 +26,8 @@
 #![cfg_attr(feature="dev", allow(match_bool))]
 // Keeps consistency (all lines with `.clone()`).
 #![cfg_attr(feature="dev", allow(clone_on_copy))]
+// Complains on Box<E> when implementing From<Box<E>>
+#![cfg_attr(feature="dev", allow(boxed_local))]
 // TODO [todr] a lot of warnings to be fixed
 #![cfg_attr(feature="dev", allow(assign_op_pattern))]

@@ -98,8 +100,12 @@ extern crate ethcore_ipc_nano as nanoipc;
 extern crate ethcore_devtools as devtools;
 extern crate rand;
 extern crate bit_set;
+extern crate lru_cache;
+extern crate bloomfilter;
+extern crate byteorder;

-#[cfg(feature = "jit" )] extern crate evmjit;
+#[cfg(feature = "jit" )]
+extern crate evmjit;

 pub mod account_provider;
 pub mod engines;
@@ -128,6 +134,7 @@ mod basic_types;
 mod env_info;
 mod pod_account;
 mod state;
+mod state_db;
 mod account;
 mod account_db;
 mod builtin;
--- a/ethcore/src/migrations/account_bloom.rs
+++ b/ethcore/src/migrations/account_bloom.rs
@@ -0,0 +1,104 @@
+// 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/>.
+
+//! Bloom upgrade
+
+use client::{DB_COL_EXTRA, DB_COL_HEADERS, DB_NO_OF_COLUMNS, DB_COL_STATE, DB_COL_ACCOUNT_BLOOM};
+use state_db::{ACCOUNT_BLOOM_SPACE, DEFAULT_ACCOUNT_PRESET, StateDB, ACCOUNT_BLOOM_HASHCOUNT_KEY};
+use util::trie::TrieDB;
+use views::HeaderView;
+use bloomfilter::Bloom;
+use util::migration::Error;
+use util::journaldb;
+use util::{H256, FixedHash, BytesConvertable};
+use util::{Database, DatabaseConfig, DBTransaction, CompactionProfile};
+use std::path::Path;
+
+fn check_bloom_exists(db: &Database) -> bool {
+	let hash_count_entry = db.get(DB_COL_ACCOUNT_BLOOM, ACCOUNT_BLOOM_HASHCOUNT_KEY)
+		.expect("Low-level database error");
+
+	hash_count_entry.is_some()
+}
+
+/// Account bloom upgrade routine. If bloom already present, does nothing.
+/// If database empty (no best block), does nothing.
+/// Can be called on upgraded database with no issues (will do nothing).
+pub fn upgrade_account_bloom(db_path: &Path) -> Result<(), Error> {
+	let path = try!(db_path.to_str().ok_or(Error::MigrationImpossible));
+	trace!(target: "migration", "Account bloom upgrade at {:?}", db_path);
+
+	let source = try!(Database::open(&DatabaseConfig {
+		max_open_files: 64,
+		cache_size: None,
+		compaction: CompactionProfile::default(),
+		columns: DB_NO_OF_COLUMNS,
+		wal: true,
+	}, path));
+
+	let best_block_hash = match try!(source.get(DB_COL_EXTRA, b"best")) {
+		// no migration needed
+		None => {
+			trace!(target: "migration", "No best block hash, skipping");
+			return Ok(());
+		},
+		Some(hash) => hash,
+	};
+	let best_block_header = match try!(source.get(DB_COL_HEADERS, &best_block_hash)) {
+		// no best block, nothing to do
+		None => {
+			trace!(target: "migration", "No best block header, skipping");
+			return Ok(())
+		},
+		Some(x) => x,
+	};
+	let state_root = HeaderView::new(&best_block_header).state_root();
+
+	if check_bloom_exists(&source) {
+		// bloom already exists, nothing to do
+		trace!(target: "migration", "Bloom already present, skipping");
+		return Ok(())
+	}
+
+	println!("Adding accounts bloom (one-time upgrade)");
+	let db = ::std::sync::Arc::new(source);
+	let bloom_journal = {
+		let mut bloom = Bloom::new(ACCOUNT_BLOOM_SPACE, DEFAULT_ACCOUNT_PRESET);
+		// no difference what algorithm is passed, since there will be no writes
+		let state_db = journaldb::new(
+			db.clone(),
+			journaldb::Algorithm::OverlayRecent,
+			DB_COL_STATE);
+		let account_trie = try!(TrieDB::new(state_db.as_hashdb(), &state_root).map_err(|e| Error::Custom(format!("Cannot open trie: {:?}", e))));
+		for (ref account_key, _) in account_trie.iter() {
+			let account_key_hash = H256::from_slice(&account_key);
+			bloom.set(account_key_hash.as_slice());
+		}
+
+		bloom.drain_journal()
+	};
+
+	trace!(target: "migration", "Generated {} bloom updates", bloom_journal.entries.len());
+
+	let batch = DBTransaction::new(&db);
+	try!(StateDB::commit_bloom(&batch, bloom_journal).map_err(|_| Error::Custom("Failed to commit bloom".to_owned())));
+	try!(db.write(batch));
+
+	trace!(target: "migration", "Finished bloom update");
+
+
+	Ok(())
+}
--- a/ethcore/src/migrations/mod.rs
+++ b/ethcore/src/migrations/mod.rs
@@ -23,3 +23,9 @@ pub mod extras;
 mod v9;
 pub use self::v9::ToV9;
 pub use self::v9::Extract;
+
+mod account_bloom;
+pub use self::account_bloom::upgrade_account_bloom;
+
+mod v10;
+pub use self::v10::ToV10;
--- a/ethcore/src/migrations/v10.rs
+++ b/ethcore/src/migrations/v10.rs
@@ -0,0 +1,35 @@
+// 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/>.
+
+//! This migration compresses the state db.
+
+use util::migration::SimpleMigration;
+
+/// Compressing migration.
+#[derive(Default)]
+pub struct ToV10;
+
+impl SimpleMigration for ToV10 {
+	fn version(&self) -> u32 {
+		10
+	}
+
+	fn columns(&self) -> Option<u32> { Some(6) }
+
+	fn simple_migrate(&mut self, key: Vec<u8>, value: Vec<u8>) -> Option<(Vec<u8>, Vec<u8>)> {
+		Some((key, value))
+	}
+}
--- a/ethcore/src/miner/miner.rs
+++ b/ethcore/src/miner/miner.rs
@@ -23,10 +23,11 @@ use account_provider::AccountProvider;
 use views::{BlockView, HeaderView};
 use state::State;
 use client::{MiningBlockChainClient, Executive, Executed, EnvInfo, TransactOptions, BlockID, CallAnalytics};
+use executive::contract_address;
 use block::{ClosedBlock, IsBlock, Block};
 use error::*;
-use transaction::SignedTransaction;
-use receipt::Receipt;
+use transaction::{Action, SignedTransaction};
+use receipt::{Receipt, RichReceipt};
 use spec::Spec;
 use engines::Engine;
 use miner::{MinerService, MinerStatus, TransactionQueue, AccountDetails, TransactionOrigin};
@@ -168,12 +169,11 @@ pub struct Miner {
 	// NOTE [ToDr]  When locking always lock in this order!
 	transaction_queue: Arc<Mutex<TransactionQueue>>,
 	sealing_work: Mutex<SealingWork>,
-
+	next_allowed_reseal: Mutex<Instant>,
+	sealing_block_last_request: Mutex<u64>,
 	// for sealing...
 	options: MinerOptions,

-	next_allowed_reseal: Mutex<Instant>,
-	sealing_block_last_request: Mutex<u64>,
 	gas_range_target: RwLock<(U256, U256)>,
 	author: RwLock<Address>,
 	extra_data: RwLock<Bytes>,
@@ -286,13 +286,20 @@ impl Miner {
 		};

 		let mut invalid_transactions = HashSet::new();
+		let mut transactions_to_penalize = HashSet::new();
 		let block_number = open_block.block().fields().header.number();
 		// TODO: push new uncles, too.
 		for tx in transactions {
 			let hash = tx.hash();
 			match open_block.push_transaction(tx, None) {
-				Err(Error::Execution(ExecutionError::BlockGasLimitReached { gas_limit, gas_used, .. })) => {
-					debug!(target: "miner", "Skipping adding transaction to block because of gas limit: {:?}", hash);
+				Err(Error::Execution(ExecutionError::BlockGasLimitReached { gas_limit, gas_used, gas })) => {
+					debug!(target: "miner", "Skipping adding transaction to block because of gas limit: {:?} (limit: {:?}, used: {:?}, gas: {:?})", hash, gas_limit, gas_used, gas);
+
+					// Penalize transaction if it's above current gas limit
+					if gas > gas_limit {
+						transactions_to_penalize.insert(hash);
+					}
+
 					// Exit early if gas left is smaller then min_tx_gas
 					let min_tx_gas: U256 = 21000.into();	// TODO: figure this out properly.
 					if gas_limit - gas_used < min_tx_gas {
@@ -301,8 +308,8 @@ impl Miner {
 				},
 				// Invalid nonce error can happen only if previous transaction is skipped because of gas limit.
 				// If there is errornous state of transaction queue it will be fixed when next block is imported.
-				Err(Error::Execution(ExecutionError::InvalidNonce { .. })) => {
-					debug!(target: "miner", "Skipping adding transaction to block because of invalid nonce: {:?}", hash);
+				Err(Error::Execution(ExecutionError::InvalidNonce { expected, got })) => {
+					debug!(target: "miner", "Skipping adding transaction to block because of invalid nonce: {:?} (expected: {:?}, got: {:?})", hash, expected, got);
 				},
 				// already have transaction - ignore
 				Err(Error::Transaction(TransactionError::AlreadyImported)) => {},
@@ -328,6 +335,9 @@ impl Miner {
 			for hash in invalid_transactions.into_iter() {
 				queue.remove_invalid(&hash, &fetch_account);
 			}
+			for hash in transactions_to_penalize {
+				queue.penalize(&hash);
+			}
 		}

 		if !block.transactions().is_empty() {
@@ -528,7 +538,7 @@ impl MinerService for Miner {

 	fn code(&self, chain: &MiningBlockChainClient, address: &Address) -> Option<Bytes> {
 		let sealing_work = self.sealing_work.lock();
-		sealing_work.queue.peek_last_ref().map_or_else(|| chain.code(address), |b| b.block().fields().state.code(address))
+		sealing_work.queue.peek_last_ref().map_or_else(|| chain.latest_code(address), |b| b.block().fields().state.code(address).map(|c| (*c).clone()))
 	}

 	fn set_author(&self, author: Address) {
@@ -713,6 +723,35 @@ impl MinerService for Miner {
 		}
 	}

+	fn pending_receipt(&self, hash: &H256) -> Option<RichReceipt> {
+		let sealing_work = self.sealing_work.lock();
+		match (sealing_work.enabled, sealing_work.queue.peek_last_ref()) {
+			(true, Some(pending)) => {
+				let txs = pending.transactions();
+				txs.iter()
+					.map(|t| t.hash())
+					.position(|t| t == *hash)
+					.map(|index| {
+						let prev_gas = if index == 0 { Default::default() } else { pending.receipts()[index - 1].gas_used };
+						let ref tx = txs[index];
+						let ref receipt = pending.receipts()[index];
+						RichReceipt {
+							transaction_hash: hash.clone(),
+							transaction_index: index,
+							cumulative_gas_used: receipt.gas_used,
+							gas_used: receipt.gas_used - prev_gas,
+							contract_address: match tx.action {
+								Action::Call(_) => None,
+								Action::Create => Some(contract_address(&tx.sender().unwrap(), &tx.nonce)),
+							},
+							logs: receipt.logs.clone(),
+						}
+					})
+			},
+			_ => None
+		}
+	}
+
 	fn pending_receipts(&self) -> BTreeMap<H256, Receipt> {
 		let sealing_work = self.sealing_work.lock();
 		match (sealing_work.enabled, sealing_work.queue.peek_last_ref()) {
@@ -736,11 +775,11 @@ impl MinerService for Miner {
 	fn update_sealing(&self, chain: &MiningBlockChainClient) {
 		trace!(target: "miner", "update_sealing");
 		let requires_reseal = {
+			let has_local_transactions = self.transaction_queue.lock().has_local_pending_transactions();
 			let mut sealing_work = self.sealing_work.lock();
 			if sealing_work.enabled {
 				trace!(target: "miner", "update_sealing: sealing enabled");
 				let current_no = chain.chain_info().best_block_number;
-				let has_local_transactions = self.transaction_queue.lock().has_local_pending_transactions();
 				let last_request = *self.sealing_block_last_request.lock();
 				let should_disable_sealing = !self.forced_sealing()
 					&& !has_local_transactions
@@ -840,7 +879,7 @@ impl MinerService for Miner {
 			out_of_chain.for_each(|txs| {
 				let mut transaction_queue = self.transaction_queue.lock();
 				let _ = self.add_transactions_to_queue(
-					chain, txs, TransactionOrigin::External, &mut transaction_queue
+					chain, txs, TransactionOrigin::RetractedBlock, &mut transaction_queue
 				);
 			});
 		}
--- a/ethcore/src/miner/mod.rs
+++ b/ethcore/src/miner/mod.rs
@@ -56,7 +56,7 @@ use std::collections::BTreeMap;
 use util::{H256, U256, Address, Bytes};
 use client::{MiningBlockChainClient, Executed, CallAnalytics};
 use block::ClosedBlock;
-use receipt::Receipt;
+use receipt::{RichReceipt, Receipt};
 use error::{Error, CallError};
 use transaction::SignedTransaction;

@@ -146,6 +146,9 @@ pub trait MinerService : Send + Sync {
 	/// Get a list of all pending receipts.
 	fn pending_receipts(&self) -> BTreeMap<H256, Receipt>;

+	/// Get a particular reciept.
+	fn pending_receipt(&self, hash: &H256) -> Option<RichReceipt>;
+
 	/// Returns highest transaction nonce for given address.
 	fn last_nonce(&self, address: &Address) -> Option<U256>;

--- a/ethcore/src/miner/transaction_queue.rs
+++ b/ethcore/src/miner/transaction_queue.rs
@@ -99,6 +99,8 @@ pub enum TransactionOrigin {
 	Local,
 	/// External transaction received from network
 	External,
+	/// Transactions from retracted blocks
+	RetractedBlock,
 }

 impl PartialOrd for TransactionOrigin {
@@ -113,10 +115,11 @@ impl Ord for TransactionOrigin {
 			return Ordering::Equal;
 		}

-		if *self == TransactionOrigin::Local {
-			Ordering::Less
-		} else {
-			Ordering::Greater
+		match (*self, *other) {
+			(TransactionOrigin::RetractedBlock, _) => Ordering::Less,
+			(_, TransactionOrigin::RetractedBlock) => Ordering::Greater,
+			(TransactionOrigin::Local, _) => Ordering::Less,
+			_ => Ordering::Greater,
 		}
 	}
 }
@@ -131,10 +134,15 @@ struct TransactionOrder {
 	/// Gas Price of the transaction.
 	/// Low gas price = Low priority (processed later)
 	gas_price: U256,
+	/// Gas (limit) of the transaction.
+	/// Low gas limit = High priority (processed earlier)
+	gas: U256,
 	/// Hash to identify associated transaction
 	hash: H256,
 	/// Origin of the transaction
 	origin: TransactionOrigin,
+	/// Penalties
+	penalties: usize,
 }


@@ -143,8 +151,10 @@ impl TransactionOrder {
 		TransactionOrder {
 			nonce_height: tx.nonce() - base_nonce,
 			gas_price: tx.transaction.gas_price,
+			gas: tx.transaction.gas,
 			hash: tx.hash(),
 			origin: tx.origin,
+			penalties: 0,
 		}
 	}

@@ -152,6 +162,11 @@ impl TransactionOrder {
 		self.nonce_height = nonce - base_nonce;
 		self
 	}
+
+	fn penalize(mut self) -> Self {
+		self.penalties = self.penalties.saturating_add(1);
+		self
+	}
 }

 impl Eq for TransactionOrder {}
@@ -168,6 +183,11 @@ impl PartialOrd for TransactionOrder {

 impl Ord for TransactionOrder {
 	fn cmp(&self, b: &TransactionOrder) -> Ordering {
+		// First check number of penalties
+		if self.penalties != b.penalties {
+			return self.penalties.cmp(&b.penalties);
+		}
+
 		// First check nonce_height
 		if self.nonce_height != b.nonce_height {
 			return self.nonce_height.cmp(&b.nonce_height);
@@ -179,11 +199,18 @@ impl Ord for TransactionOrder {
 			return self.origin.cmp(&b.origin);
 		}

-		// Then compare gas_prices
-		let a_gas = self.gas_price;
-		let b_gas = b.gas_price;
+		// Then compare gas usage
+		let a_gas = self.gas;
+		let b_gas = b.gas;
 		if a_gas != b_gas {
-			return b_gas.cmp(&a_gas);
+			return a_gas.cmp(&b_gas);
+		}
+
+		// Then compare gas_prices
+		let a_gas_price = self.gas_price;
+		let b_gas_price = b.gas_price;
+		if a_gas_price != b_gas_price {
+			return b_gas_price.cmp(&a_gas_price);
 		}

 		// Compare hashes
@@ -321,7 +348,7 @@ pub struct AccountDetails {


 /// Transactions with `gas > (gas_limit + gas_limit * Factor(in percents))` are not imported to the queue.
-const GAS_LIMIT_HYSTERESIS: usize = 10; // %
+const GAS_LIMIT_HYSTERESIS: usize = 10; // (100/GAS_LIMIT_HYSTERESIS) %

 /// `TransactionQueue` implementation
 pub struct TransactionQueue {
@@ -504,6 +531,39 @@ impl TransactionQueue {
 		assert_eq!(self.future.by_priority.len() + self.current.by_priority.len(), self.by_hash.len());
 	}

+	/// Penalize transactions from sender of transaction with given hash.
+	/// I.e. it should change the priority of the transaction in the queue.
+	///
+	/// NOTE: We need to penalize all transactions from particular sender
+	/// to avoid breaking invariants in queue (ordered by nonces).
+	/// Consecutive transactions from this sender would fail otherwise (because of invalid nonce).
+	pub fn penalize(&mut self, transaction_hash: &H256) {
+		let transaction = match self.by_hash.get(transaction_hash) {
+			None => return,
+			Some(t) => t,
+		};
+		let sender = transaction.sender();
+
+		// Penalize all transactions from this sender
+		let nonces_from_sender = match self.current.by_address.row(&sender) {
+			Some(row_map) => row_map.keys().cloned().collect::<Vec<U256>>(),
+			None => vec![],
+		};
+		for k in nonces_from_sender {
+			let order = self.current.drop(&sender, &k).unwrap();
+			self.current.insert(sender, k, order.penalize());
+		}
+		// Same thing for future
+		let nonces_from_sender = match self.future.by_address.row(&sender) {
+			Some(row_map) => row_map.keys().cloned().collect::<Vec<U256>>(),
+			None => vec![],
+		};
+		for k in nonces_from_sender {
+			let order = self.future.drop(&sender, &k).unwrap();
+			self.current.insert(sender, k, order.penalize());
+		}
+	}
+
 	/// Removes invalid transaction identified by hash from queue.
 	/// Assumption is that this transaction nonce is not related to client nonce,
 	/// so transactions left in queue are processed according to client nonce.
@@ -577,7 +637,10 @@ impl TransactionQueue {
 			// Goes to future or is removed
 			let order = self.current.drop(sender, &k).unwrap();
 			if k >= current_nonce {
-				self.future.insert(*sender, k, order.update_height(k, current_nonce));
+				let order = order.update_height(k, current_nonce);
+				if let Some(old) = self.future.insert(*sender, k, order.clone()) {
+					Self::replace_orders(*sender, k, old, order, &mut self.future, &mut self.by_hash);
+				}
 			} else {
 				trace!(target: "txqueue", "Removing old transaction: {:?} (nonce: {} < {})", order.hash, k, current_nonce);
 				self.by_hash.remove(&order.hash).expect("All transactions in `future` are also in `by_hash`");
@@ -641,7 +704,9 @@ impl TransactionQueue {
 				self.future.by_priority.remove(&order);
 				// Put to current
 				let order = order.update_height(current_nonce, first_nonce);
-				self.current.insert(address, current_nonce, order);
+				if let Some(old) = self.current.insert(address, current_nonce, order.clone()) {
+					Self::replace_orders(address, current_nonce, old, order, &mut self.current, &mut self.by_hash);
+				}
 				update_last_nonce_to = Some(current_nonce);
 				current_nonce = current_nonce + U256::one();
 			}
@@ -673,45 +738,51 @@ impl TransactionQueue {

 		let address = tx.sender();
 		let nonce = tx.nonce();
-
-		let next_nonce = self.last_nonces
-			.get(&address)
-			.cloned()
-			.map_or(state_nonce, |n| n + U256::one());
+		let hash = tx.hash();

 		// The transaction might be old, let's check that.
 		// This has to be the first test, otherwise calculating
 		// nonce height would result in overflow.
 		if nonce < state_nonce {
 			// Droping transaction
-			trace!(target: "txqueue", "Dropping old transaction: {:?} (nonce: {} < {})", tx.hash(), nonce, next_nonce);
+			trace!(target: "txqueue", "Dropping old transaction: {:?} (nonce: {} < {})", hash, nonce, state_nonce);
 			return Err(TransactionError::Old);
-		} else if nonce > next_nonce {
+		}
+
+		// Update nonces of transactions in future (remove old transactions)
+		self.update_future(&address, state_nonce);
+		// State nonce could be updated. Maybe there are some more items waiting in future?
+		self.move_matching_future_to_current(address, state_nonce, state_nonce);
+		// Check the next expected nonce (might be updated by move above)
+		let next_nonce = self.last_nonces
+			.get(&address)
+			.cloned()
+			.map_or(state_nonce, |n| n + U256::one());
+
+		// Future transaction
+		if nonce > next_nonce {
 			// We have a gap - put to future.
-			// Update nonces of transactions in future (remove old transactions)
-			self.update_future(&address, state_nonce);
 			// Insert transaction (or replace old one with lower gas price)
 			try!(check_too_cheap(Self::replace_transaction(tx, state_nonce, &mut self.future, &mut self.by_hash)));
-			// Return an error if this transaction is not imported because of limit.
-			try!(check_if_removed(&address, &nonce, self.future.enforce_limit(&mut self.by_hash)));
+			// Enforce limit in Future
+			let removed = self.future.enforce_limit(&mut self.by_hash);
+			// Return an error if this transaction was not imported because of limit.
+			try!(check_if_removed(&address, &nonce, removed));
+
+			debug!(target: "txqueue", "Importing transaction to future: {:?}", hash);
+			debug!(target: "txqueue", "status: {:?}", self.status());
 			return Ok(TransactionImportResult::Future);
 		}
+
+		// We might have filled a gap - move some more transactions from future
+		self.move_matching_future_to_current(address, nonce, state_nonce);
+		self.move_matching_future_to_current(address, nonce + U256::one(), state_nonce);
+
+		// Replace transaction if any
 		try!(check_too_cheap(Self::replace_transaction(tx, state_nonce, &mut self.current, &mut self.by_hash)));
 		// Keep track of highest nonce stored in current
 		let new_max = self.last_nonces.get(&address).map_or(nonce, |n| cmp::max(nonce, *n));
 		self.last_nonces.insert(address, new_max);
-		// Update nonces of transactions in future
-		self.update_future(&address, state_nonce);
-		// Maybe there are some more items waiting in future?
-		self.move_matching_future_to_current(address, nonce + U256::one(), state_nonce);
-		// There might be exactly the same transaction waiting in future
-		// same (sender, nonce), but above function would not move it.
-		if let Some(order) = self.future.drop(&address, &nonce) {
-			// Let's insert that transaction to current (if it has higher gas_price)
-			let future_tx = self.by_hash.remove(&order.hash).expect("All transactions in `future` are always in `by_hash`.");
-			// if transaction in `current` (then one we are importing) is replaced it means that it has to low gas_price
-			try!(check_too_cheap(!Self::replace_transaction(future_tx, state_nonce, &mut self.current, &mut self.by_hash)));
-		}

 		// Also enforce the limit
 		let removed = self.current.enforce_limit(&mut self.by_hash);
@@ -755,24 +826,28 @@ impl TransactionQueue {


 		if let Some(old) = set.insert(address, nonce, order.clone()) {
-			// There was already transaction in queue. Let's check which one should stay
-			let old_fee = old.gas_price;
-			let new_fee = order.gas_price;
-			if old_fee.cmp(&new_fee) == Ordering::Greater {
-				// Put back old transaction since it has greater priority (higher gas_price)
-				set.insert(address, nonce, old);
-				// and remove new one
-				by_hash.remove(&hash).expect("The hash has been just inserted and no other line is altering `by_hash`.");
-				false
-			} else {
-				// Make sure we remove old transaction entirely
-				by_hash.remove(&old.hash).expect("The hash is coming from `future` so it has to be in `by_hash`.");
-				true
-			}
+			Self::replace_orders(address, nonce, old, order, set, by_hash)
 		} else {
 			true
 		}
 	}
+
+	fn replace_orders(address: Address, nonce: U256, old: TransactionOrder, order: TransactionOrder, set: &mut TransactionSet, by_hash: &mut HashMap<H256, VerifiedTransaction>) -> bool {
+		// There was already transaction in queue. Let's check which one should stay
+		let old_fee = old.gas_price;
+		let new_fee = order.gas_price;
+		if old_fee.cmp(&new_fee) == Ordering::Greater {
+			// Put back old transaction since it has greater priority (higher gas_price)
+			set.insert(address, nonce, old);
+			// and remove new one
+			by_hash.remove(&order.hash).expect("The hash has been just inserted and no other line is altering `by_hash`.");
+			false
+		} else {
+			// Make sure we remove old transaction entirely
+			by_hash.remove(&old.hash).expect("The hash is coming from `future` so it has to be in `by_hash`.");
+			true
+		}
+	}
 }

 fn check_too_cheap(is_in: bool) -> Result<(), TransactionError> {
@@ -814,25 +889,40 @@ mod test {
 		}
 	}

-	fn new_unsigned_tx(nonce: U256) -> Transaction {
+	fn default_nonce_val() -> U256 {
+		123.into()
+	}
+
+	fn default_gas_val() -> U256 {
+		100_000.into()
+	}
+
+	fn default_gas_price_val() -> U256 {
+		1.into()
+	}
+
+	fn new_unsigned_tx_with_gas(nonce: U256, gas: U256, gas_price: U256) -> Transaction {
 		Transaction {
 			action: Action::Create,
 			value: U256::from(100),
 			data: "3331600055".from_hex().unwrap(),
-			gas: U256::from(100_000),
-			gas_price: U256::one(),
+			gas: gas,
+			gas_price: gas_price,
 			nonce: nonce
 		}
 	}

-	fn new_tx() -> SignedTransaction {
-		let keypair = KeyPair::create().unwrap();
-		new_unsigned_tx(U256::from(123)).sign(keypair.secret())
+	fn new_unsigned_tx(nonce: U256) -> Transaction {
+		new_unsigned_tx_with_gas(nonce, default_gas_val(), default_gas_price_val())
 	}

+	fn new_tx_with_gas(gas: U256, gas_price: U256) -> SignedTransaction {
+		let keypair = KeyPair::create().unwrap();
+		new_unsigned_tx_with_gas(default_nonce_val(), gas, gas_price).sign(keypair.secret())
+	}

-	fn default_nonce_val() -> U256 {
-		U256::from(123)
+	fn new_tx() -> SignedTransaction {
+		new_tx_with_gas(default_gas_val(), default_gas_price_val())
 	}

 	fn default_nonce(_address: &Address) -> AccountDetails {
@@ -846,10 +936,10 @@ mod test {
 	fn new_similar_txs() -> (SignedTransaction, SignedTransaction) {
 		let keypair = KeyPair::create().unwrap();
 		let secret = &keypair.secret();
-		let nonce = U256::from(123);
+		let nonce = default_nonce_val();
 		let tx = new_unsigned_tx(nonce);
 		let mut tx2 = new_unsigned_tx(nonce);
-		tx2.gas_price = U256::from(2);
+		tx2.gas_price = 2.into();

 		(tx.sign(secret), tx2.sign(secret))
 	}
@@ -858,6 +948,18 @@ mod test {
 		new_txs_with_gas_price_diff(second_nonce, U256::zero())
 	}

+	fn new_txs_with_higher_gas_price(gas_price: U256) -> (SignedTransaction, SignedTransaction) {
+		let keypair = KeyPair::create().unwrap();
+		let secret = &keypair.secret();
+		let nonce = U256::from(123);
+		let mut tx = new_unsigned_tx(nonce);
+		tx.gas_price = tx.gas_price + gas_price;
+		let mut tx2 = new_unsigned_tx(nonce + 1.into());
+		tx2.gas_price = tx2.gas_price + gas_price;
+
+		(tx.sign(secret), tx2.sign(secret))
+	}
+
 	fn new_txs_with_gas_price_diff(second_nonce: U256, gas_price: U256) -> (SignedTransaction, SignedTransaction) {
 		let keypair = KeyPair::create().unwrap();
 		let secret = &keypair.secret();
@@ -869,6 +971,17 @@ mod test {
 		(tx.sign(secret), tx2.sign(secret))
 	}

+	#[test]
+	fn test_ordering() {
+		assert_eq!(TransactionOrigin::Local.cmp(&TransactionOrigin::External), Ordering::Less);
+		assert_eq!(TransactionOrigin::RetractedBlock.cmp(&TransactionOrigin::Local), Ordering::Less);
+		assert_eq!(TransactionOrigin::RetractedBlock.cmp(&TransactionOrigin::External), Ordering::Less);
+
+		assert_eq!(TransactionOrigin::External.cmp(&TransactionOrigin::Local), Ordering::Greater);
+		assert_eq!(TransactionOrigin::Local.cmp(&TransactionOrigin::RetractedBlock), Ordering::Greater);
+		assert_eq!(TransactionOrigin::External.cmp(&TransactionOrigin::RetractedBlock), Ordering::Greater);
+	}
+
 	#[test]
 	fn should_create_transaction_set() {
 		// given
@@ -972,6 +1085,31 @@ mod test {
 		assert_eq!(txq.top_transactions()[0], tx2);
 	}

+	#[test]
+	fn should_move_all_transactions_from_future() {
+		// given
+		let mut txq = TransactionQueue::new();
+		let (tx, tx2) = new_txs_with_gas_price_diff(1.into(), 1.into());
+		let prev_nonce = |a: &Address| AccountDetails{ nonce: default_nonce(a).nonce - U256::one(), balance:
+			!U256::zero() };
+
+		// First insert one transaction to future
+		let res = txq.add(tx.clone(), &prev_nonce, TransactionOrigin::External);
+		assert_eq!(res.unwrap(), TransactionImportResult::Future);
+		assert_eq!(txq.status().future, 1);
+
+		// now import second transaction to current
+		let res = txq.add(tx2.clone(), &default_nonce, TransactionOrigin::External);
+
+		// then
+		assert_eq!(res.unwrap(), TransactionImportResult::Current);
+		assert_eq!(txq.status().pending, 2);
+		assert_eq!(txq.status().future, 0);
+		assert_eq!(txq.current.by_priority.len(), 2);
+		assert_eq!(txq.current.by_address.len(), 2);
+		assert_eq!(txq.top_transactions()[0], tx);
+		assert_eq!(txq.top_transactions()[1], tx2);
+	}

 	#[test]
 	fn should_import_tx() {
@@ -988,6 +1126,39 @@ mod test {
 		assert_eq!(stats.pending, 1);
 	}

+	#[test]
+	fn should_order_by_gas() {
+		// given
+		let mut txq = TransactionQueue::new();
+		let tx1 = new_tx_with_gas(50000.into(), 40.into());
+		let tx2 = new_tx_with_gas(40000.into(), 30.into());
+		let tx3 = new_tx_with_gas(30000.into(), 10.into());
+		let tx4 = new_tx_with_gas(50000.into(), 20.into());
+		txq.set_minimal_gas_price(15.into());
+
+		// when
+		let res1 = txq.add(tx1, &default_nonce, TransactionOrigin::External);
+		let res2 = txq.add(tx2, &default_nonce, TransactionOrigin::External);
+		let res3 = txq.add(tx3, &default_nonce, TransactionOrigin::External);
+		let res4 = txq.add(tx4, &default_nonce, TransactionOrigin::External);
+
+		// then
+		assert_eq!(res1.unwrap(), TransactionImportResult::Current);
+		assert_eq!(res2.unwrap(), TransactionImportResult::Current);
+		assert_eq!(unwrap_tx_err(res3), TransactionError::InsufficientGasPrice {
+			minimal: U256::from(15),
+			got: U256::from(10),
+		});
+		assert_eq!(res4.unwrap(), TransactionImportResult::Current);
+		let stats = txq.status();
+		assert_eq!(stats.pending, 3);
+		assert_eq!(txq.top_transactions()[0].gas, 40000.into());
+		assert_eq!(txq.top_transactions()[1].gas, 50000.into());
+		assert_eq!(txq.top_transactions()[2].gas, 50000.into());
+		assert_eq!(txq.top_transactions()[1].gas_price, 40.into());
+		assert_eq!(txq.top_transactions()[2].gas_price, 20.into());
+	}
+
 	#[test]
 	fn gas_limit_should_never_overflow() {
 		// given
@@ -1024,7 +1195,6 @@ mod test {
 		assert_eq!(stats.future, 0);
 	}

-
 	#[test]
 	fn should_drop_transactions_from_senders_without_balance() {
 		// given
@@ -1086,7 +1256,7 @@ mod test {
 	}

 	#[test]
-	fn should_reject_incorectly_signed_transaction() {
+	fn should_reject_incorrectly_signed_transaction() {
 		// given
 		let mut txq = TransactionQueue::new();
 		let tx = new_unsigned_tx(U256::from(123));
@@ -1149,6 +1319,27 @@ mod test {
 		assert_eq!(top.len(), 2);
 	}

+	#[test]
+	fn should_prioritize_reimported_transactions_within_same_nonce_height() {
+		// given
+		let mut txq = TransactionQueue::new();
+		let tx = new_tx();
+		// the second one has same nonce but higher `gas_price`
+		let (_, tx2) = new_similar_txs();
+
+		// when
+		// first insert local one with higher gas price
+		txq.add(tx2.clone(), &default_nonce, TransactionOrigin::Local).unwrap();
+		// then the one with lower gas price, but from retracted block
+		txq.add(tx.clone(), &default_nonce, TransactionOrigin::RetractedBlock).unwrap();
+
+		// then
+		let top = txq.top_transactions();
+		assert_eq!(top[0], tx); // retracted should be first
+		assert_eq!(top[1], tx2);
+		assert_eq!(top.len(), 2);
+	}
+
 	#[test]
 	fn should_not_prioritize_local_transactions_with_different_nonce_height() {
 		// given
@@ -1166,6 +1357,39 @@ mod test {
 		assert_eq!(top.len(), 2);
 	}

+	#[test]
+	fn should_penalize_transactions_from_sender() {
+		// given
+		let mut txq = TransactionQueue::new();
+		// txa, txb - slightly bigger gas price to have consistent ordering
+		let (txa, txb) = new_txs(U256::from(1));
+		let (tx1, tx2) = new_txs_with_higher_gas_price(U256::from(3));
+
+		// insert everything
+		txq.add(txa.clone(), &default_nonce, TransactionOrigin::External).unwrap();
+		txq.add(txb.clone(), &default_nonce, TransactionOrigin::External).unwrap();
+		txq.add(tx1.clone(), &default_nonce, TransactionOrigin::External).unwrap();
+		txq.add(tx2.clone(), &default_nonce, TransactionOrigin::External).unwrap();
+
+		let top = txq.top_transactions();
+		assert_eq!(top[0], tx1);
+		assert_eq!(top[1], txa);
+		assert_eq!(top[2], tx2);
+		assert_eq!(top[3], txb);
+		assert_eq!(top.len(), 4);
+
+		// when
+		txq.penalize(&tx1.hash());
+
+		// then
+		let top = txq.top_transactions();
+		assert_eq!(top[0], txa);
+		assert_eq!(top[1], txb);
+		assert_eq!(top[2], tx1);
+		assert_eq!(top[3], tx2);
+		assert_eq!(top.len(), 4);
+	}
+
 	#[test]
 	fn should_return_pending_hashes() {
 			// given
@@ -1467,7 +1691,7 @@ mod test {
 		let keypair = KeyPair::create().unwrap();
 		let tx = new_unsigned_tx(U256::from(123)).sign(keypair.secret());
 		let tx2 = {
-			let mut tx2 = tx.deref().clone();
+			let mut tx2 = (*tx).clone();
 			tx2.gas_price = U256::from(200);
 			tx2.sign(keypair.secret())
 		};
@@ -1490,12 +1714,12 @@ mod test {
 		let keypair = KeyPair::create().unwrap();
 		let tx0 = new_unsigned_tx(U256::from(123)).sign(keypair.secret());
 		let tx1 = {
-			let mut tx1 = tx0.deref().clone();
+			let mut tx1 = (*tx0).clone();
 			tx1.nonce = U256::from(124);
 			tx1.sign(keypair.secret())
 		};
 		let tx2 = {
-			let mut tx2 = tx1.deref().clone();
+			let mut tx2 = (*tx1).clone();
 			tx2.gas_price = U256::from(200);
 			tx2.sign(keypair.secret())
 		};
--- a/ethcore/src/pod_account.rs
+++ b/ethcore/src/pod_account.rs
@@ -47,7 +47,7 @@ impl PodAccount {
 		PodAccount {
 			balance: *acc.balance(),
 			nonce: *acc.nonce(),
-			storage: acc.storage_overlay().iter().fold(BTreeMap::new(), |mut m, (k, &(_, ref v))| {m.insert(k.clone(), v.clone()); m}),
+			storage: acc.storage_changes().iter().fold(BTreeMap::new(), |mut m, (k, v)| {m.insert(k.clone(), v.clone()); m}),
 			code: acc.code().map(|x| x.to_vec()),
 		}
 	}
--- a/ethcore/src/snapshot/account.rs
+++ b/ethcore/src/snapshot/account.rs
@@ -143,7 +143,7 @@ impl Account {
 #[cfg(test)]
 mod tests {
 	use account_db::{AccountDB, AccountDBMut};
-	use tests::helpers::get_temp_journal_db;
+	use tests::helpers::get_temp_state_db;
 	use snapshot::tests::helpers::fill_storage;

 	use util::{SHA3_NULL_RLP, SHA3_EMPTY};
@@ -154,8 +154,7 @@ mod tests {

 	#[test]
 	fn encoding_basic() {
-		let mut db = get_temp_journal_db();
-		let mut db = &mut **db;
+		let mut db = get_temp_state_db();
 		let addr = Address::random();

 		let account = Account {
@@ -175,8 +174,7 @@ mod tests {

 	#[test]
 	fn encoding_storage() {
-		let mut db = get_temp_journal_db();
-		let mut db = &mut **db;
+		let mut db = get_temp_state_db();
 		let addr = Address::random();

 		let account = {
@@ -198,4 +196,4 @@ mod tests {
 		let fat_rlp = UntrustedRlp::new(&fat_rlp);
 		assert_eq!(Account::from_fat_rlp(&mut AccountDBMut::new(db.as_hashdb_mut(), &addr), fat_rlp).unwrap(), account);
 	}
-}
+}
--- a/ethcore/src/snapshot/error.rs
+++ b/ethcore/src/snapshot/error.rs
@@ -18,6 +18,8 @@

 use std::fmt;

+use ids::BlockID;
+
 use util::H256;
 use util::trie::TrieError;
 use util::rlp::DecoderError;
@@ -26,9 +28,13 @@ use util::rlp::DecoderError;
 #[derive(Debug)]
 pub enum Error {
 	/// Invalid starting block for snapshot.
-	InvalidStartingBlock(H256),
+	InvalidStartingBlock(BlockID),
 	/// Block not found.
 	BlockNotFound(H256),
+	/// Incomplete chain.
+	IncompleteChain,
+	/// Old starting block in a pruned database.
+	OldBlockPrunedDB,
 	/// Trie error.
 	Trie(TrieError),
 	/// Decoder error.
@@ -40,8 +46,11 @@ pub enum Error {
 impl fmt::Display for Error {
 	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 		match *self {
-			Error::InvalidStartingBlock(ref hash) => write!(f, "Invalid starting block hash: {}", hash),
+			Error::InvalidStartingBlock(ref id) => write!(f, "Invalid starting block: {:?}", id),
 			Error::BlockNotFound(ref hash) => write!(f, "Block not found in chain: {}", hash),
+			Error::IncompleteChain => write!(f, "Cannot create snapshot due to incomplete chain."),
+			Error::OldBlockPrunedDB => write!(f, "Attempted to create a snapshot at an old block while using \
+				a pruned database. Please re-run with the --pruning archive flag."),
 			Error::Io(ref err) => err.fmt(f),
 			Error::Decoder(ref err) => err.fmt(f),
 			Error::Trie(ref err) => err.fmt(f),
@@ -55,9 +64,9 @@ impl From<::std::io::Error> for Error {
 	}
 }

-impl From<Box<TrieError>> for Error {
-	fn from(err: Box<TrieError>) -> Self {
-		Error::Trie(*err)
+impl From<TrieError> for Error {
+	fn from(err: TrieError) -> Self {
+		Error::Trie(err)
 	}
 }

@@ -65,4 +74,10 @@ impl From<DecoderError> for Error {
 	fn from(err: DecoderError) -> Self {
 		Error::Decoder(err)
 	}
-}
+}
+
+impl<E> From<Box<E>> for Error where Error: From<E> {
+	fn from(err: Box<E>) -> Self {
+		Error::from(*err)
+	}
+}
--- a/ethcore/src/snapshot/mod.rs
+++ b/ethcore/src/snapshot/mod.rs
@@ -18,13 +18,16 @@

 use std::collections::VecDeque;
 use std::sync::Arc;
+use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};

 use account_db::{AccountDB, AccountDBMut};
 use blockchain::{BlockChain, BlockProvider};
 use engines::Engine;
+use ids::BlockID;
 use views::BlockView;
+use super::state_db::StateDB;

-use util::{Bytes, Hashable, HashDB, snappy, TrieDB, TrieDBMut, TrieMut};
+use util::{Bytes, Hashable, HashDB, snappy, TrieDB, TrieDBMut, TrieMut, BytesConvertable};
 use util::Mutex;
 use util::hash::{FixedHash, H256};
 use util::journaldb::{self, Algorithm, JournalDB};
@@ -58,9 +61,39 @@ const PREFERRED_CHUNK_SIZE: usize = 4 * 1024 * 1024;
 // How many blocks to include in a snapshot, starting from the head of the chain.
 const SNAPSHOT_BLOCKS: u64 = 30000;

+/// A progress indicator for snapshots.
+#[derive(Debug, Default)]
+pub struct Progress {
+	accounts: AtomicUsize,
+	blocks: AtomicUsize,
+	size: AtomicUsize, // Todo [rob] use Atomicu64 when it stabilizes.
+	done: AtomicBool,
+}
+
+impl Progress {
+	/// Get the number of accounts snapshotted thus far.
+	pub fn accounts(&self) -> usize { self.accounts.load(Ordering::Relaxed) }
+
+	/// Get the number of blocks snapshotted thus far.
+	pub fn blocks(&self) -> usize { self.blocks.load(Ordering::Relaxed) }
+
+	/// Get the written size of the snapshot in bytes.
+	pub fn size(&self) -> usize { self.size.load(Ordering::Relaxed) }
+
+	/// Whether the snapshot is complete.
+	pub fn done(&self) -> bool  { self.done.load(Ordering::SeqCst) }
+
+}
 /// Take a snapshot using the given blockchain, starting block hash, and database, writing into the given writer.
-pub fn take_snapshot<W: SnapshotWriter + Send>(chain: &BlockChain, start_block_hash: H256, state_db: &HashDB, writer: W) -> Result<(), Error> {
-	let start_header = try!(chain.block_header(&start_block_hash).ok_or(Error::InvalidStartingBlock(start_block_hash)));
+pub fn take_snapshot<W: SnapshotWriter + Send>(
+	chain: &BlockChain,
+	block_at: H256,
+	state_db: &HashDB,
+	writer: W,
+	p: &Progress
+) -> Result<(), Error> {
+	let start_header = try!(chain.block_header(&block_at)
+		.ok_or(Error::InvalidStartingBlock(BlockID::Hash(block_at))));
 	let state_root = start_header.state_root();
 	let number = start_header.number();

@@ -68,8 +101,8 @@ pub fn take_snapshot<W: SnapshotWriter + Send>(chain: &BlockChain, start_block_h

 	let writer = Mutex::new(writer);
 	let (state_hashes, block_hashes) = try!(scope(|scope| {
-		let block_guard = scope.spawn(|| chunk_blocks(chain, (number, start_block_hash), &writer));
-		let state_res = chunk_state(state_db, state_root, &writer);
+		let block_guard = scope.spawn(|| chunk_blocks(chain, (number, block_at), &writer, p));
+		let state_res = chunk_state(state_db, state_root, &writer, p);

 		state_res.and_then(|state_hashes| {
 			block_guard.join().map(|block_hashes| (state_hashes, block_hashes))
@@ -83,11 +116,13 @@ pub fn take_snapshot<W: SnapshotWriter + Send>(chain: &BlockChain, start_block_h
 		block_hashes: block_hashes,
 		state_root: *state_root,
 		block_number: number,
-		block_hash: start_block_hash,
+		block_hash: block_at,
 	};

 	try!(writer.into_inner().finish(manifest_data));

+	p.done.store(true, Ordering::SeqCst);
+
 	Ok(())
 }

@@ -100,6 +135,7 @@ struct BlockChunker<'a> {
 	hashes: Vec<H256>,
 	snappy_buffer: Vec<u8>,
 	writer: &'a Mutex<SnapshotWriter + 'a>,
+	progress: &'a Progress,
 }

 impl<'a> BlockChunker<'a> {
@@ -162,7 +198,8 @@ impl<'a> BlockChunker<'a> {

 		let parent_total_difficulty = parent_details.total_difficulty;

-		let mut rlp_stream = RlpStream::new_list(3 + self.rlps.len());
+		let num_entries = self.rlps.len();
+		let mut rlp_stream = RlpStream::new_list(3 + num_entries);
 		rlp_stream.append(&parent_number).append(&parent_hash).append(&parent_total_difficulty);

 		for pair in self.rlps.drain(..) {
@@ -178,6 +215,9 @@ impl<'a> BlockChunker<'a> {
 		try!(self.writer.lock().write_block_chunk(hash, compressed));
 		trace!(target: "snapshot", "wrote block chunk. hash: {}, size: {}, uncompressed size: {}", hash.hex(), size, raw_data.len());

+		self.progress.size.fetch_add(size, Ordering::SeqCst);
+		self.progress.blocks.fetch_add(num_entries, Ordering::SeqCst);
+
 		self.hashes.push(hash);
 		Ok(())
 	}
@@ -189,7 +229,7 @@ impl<'a> BlockChunker<'a> {
 /// The path parameter is the directory to store the block chunks in.
 /// This function assumes the directory exists already.
 /// Returns a list of chunk hashes, with the first having the blocks furthest from the genesis.
-pub fn chunk_blocks<'a>(chain: &'a BlockChain, start_block_info: (u64, H256), writer: &Mutex<SnapshotWriter + 'a>) -> Result<Vec<H256>, Error> {
+pub fn chunk_blocks<'a>(chain: &'a BlockChain, start_block_info: (u64, H256), writer: &Mutex<SnapshotWriter + 'a>, progress: &'a Progress) -> Result<Vec<H256>, Error> {
 	let (start_number, start_hash) = start_block_info;

 	let first_hash = if start_number < SNAPSHOT_BLOCKS {
@@ -197,8 +237,7 @@ pub fn chunk_blocks<'a>(chain: &'a BlockChain, start_block_info: (u64, H256), wr
 		chain.genesis_hash()
 	} else {
 		let first_num = start_number - SNAPSHOT_BLOCKS;
-		chain.block_hash(first_num)
-			.expect("number before best block number; whole chain is stored; qed")
+		try!(chain.block_hash(first_num).ok_or(Error::IncompleteChain))
 	};

 	let mut chunker = BlockChunker {
@@ -208,6 +247,7 @@ pub fn chunk_blocks<'a>(chain: &'a BlockChain, start_block_info: (u64, H256), wr
 		hashes: Vec::new(),
 		snappy_buffer: vec![0; snappy::max_compressed_len(PREFERRED_CHUNK_SIZE)],
 		writer: writer,
+		progress: progress,
 	};

 	try!(chunker.chunk_all(first_hash));
@@ -222,6 +262,7 @@ struct StateChunker<'a> {
 	cur_size: usize,
 	snappy_buffer: Vec<u8>,
 	writer: &'a Mutex<SnapshotWriter + 'a>,
+	progress: &'a Progress,
 }

 impl<'a> StateChunker<'a> {
@@ -249,7 +290,8 @@ impl<'a> StateChunker<'a> {
 	// Write out the buffer to disk, pushing the created chunk's hash to
 	// the list.
 	fn write_chunk(&mut self) -> Result<(), Error> {
-		let mut stream = RlpStream::new_list(self.rlps.len());
+		let num_entries = self.rlps.len();
+		let mut stream = RlpStream::new_list(num_entries);
 		for rlp in self.rlps.drain(..) {
 			stream.append_raw(&rlp, 1);
 		}
@@ -263,6 +305,9 @@ impl<'a> StateChunker<'a> {
 		try!(self.writer.lock().write_state_chunk(hash, compressed));
 		trace!(target: "snapshot", "wrote state chunk. size: {}, uncompressed size: {}", compressed_size, raw_data.len());

+		self.progress.accounts.fetch_add(num_entries, Ordering::SeqCst);
+		self.progress.size.fetch_add(compressed_size, Ordering::SeqCst);
+
 		self.hashes.push(hash);
 		self.cur_size = 0;

@@ -275,7 +320,7 @@ impl<'a> StateChunker<'a> {
 ///
 /// Returns a list of hashes of chunks created, or any error it may
 /// have encountered.
-pub fn chunk_state<'a>(db: &HashDB, root: &H256, writer: &Mutex<SnapshotWriter + 'a>) -> Result<Vec<H256>, Error> {
+pub fn chunk_state<'a>(db: &HashDB, root: &H256, writer: &Mutex<SnapshotWriter + 'a>, progress: &'a Progress) -> Result<Vec<H256>, Error> {
 	let account_trie = try!(TrieDB::new(db, &root));

 	let mut chunker = StateChunker {
@@ -284,10 +329,9 @@ pub fn chunk_state<'a>(db: &HashDB, root: &H256, writer: &Mutex<SnapshotWriter +
 		cur_size: 0,
 		snappy_buffer: vec![0; snappy::max_compressed_len(PREFERRED_CHUNK_SIZE)],
 		writer: writer,
+		progress: progress,
 	};

-	trace!(target: "snapshot", "beginning state chunking");
-
 	// account_key here is the address' hash.
 	for (account_key, account_data) in account_trie.iter() {
 		let account = Account::from_thin_rlp(account_data);
@@ -383,6 +427,7 @@ impl StateRebuilder {
 		let chunk_size = account_fat_rlps.len() / ::num_cpus::get() + 1;

 		// build account tries in parallel.
+		// Todo [rob] keep a thread pool around so we don't do this per-chunk.
 		try!(scope(|scope| {
 			let mut handles = Vec::new();
 			for (account_chunk, out_pairs_chunk) in account_fat_rlps.chunks(chunk_size).zip(pairs.chunks_mut(chunk_size)) {
@@ -409,7 +454,7 @@ impl StateRebuilder {
 			Ok::<_, ::error::Error>(())
 		}));

-
+		let mut bloom = StateDB::load_bloom(&backing);
 		// batch trie writes
 		{
 			let mut account_trie = if self.state_root != SHA3_NULL_RLP {
@@ -419,11 +464,14 @@ impl StateRebuilder {
 			};

 			for (hash, thin_rlp) in pairs {
+				bloom.set(hash.as_slice());
 				try!(account_trie.insert(&hash, &thin_rlp));
 			}
 		}

+		let bloom_journal = bloom.drain_journal();
 		let batch = backing.transaction();
+		try!(StateDB::commit_bloom(&batch, bloom_journal));
 		try!(self.db.inject(&batch));
 		try!(backing.write(batch).map_err(::util::UtilError::SimpleString));
 		trace!(target: "snapshot", "current state root: {:?}", self.state_root);
@@ -456,12 +504,12 @@ fn rebuild_account_trie(db: &mut HashDB, account_chunk: &[&[u8]], out_chunk: &mu
 	Ok(())
 }

-/// Proportion of blocks which we will verify PoW for.
+/// Proportion of blocks which we will verify `PoW` for.
 const POW_VERIFY_RATE: f32 = 0.02;

 /// Rebuilds the blockchain from chunks.
 ///
-/// Does basic verification for all blocks, but PoW verification for some.
+/// Does basic verification for all blocks, but `PoW` verification for some.
 /// Blocks must be fed in-order.
 ///
 /// The first block in every chunk is disconnected from the last block in the
--- a/ethcore/src/snapshot/service.rs
+++ b/ethcore/src/snapshot/service.rs
@@ -101,7 +101,7 @@ impl Restoration {
 	fn new(manifest: &ManifestData, pruning: Algorithm, path: &Path, gb: &[u8]) -> Result<Self, Error> {
 		let cfg = DatabaseConfig::with_columns(::client::DB_NO_OF_COLUMNS);
 		let raw_db = Arc::new(try!(Database::open(&cfg, &*path.to_string_lossy())
-			.map_err(|s| UtilError::SimpleString(s))));
+			.map_err(UtilError::SimpleString)));

 		let chain = BlockChain::new(Default::default(), gb, raw_db.clone());
 		let blocks = try!(BlockRebuilder::new(chain, manifest.block_number));
@@ -207,23 +207,17 @@ impl Service {
 		};

 		// create the snapshot dir if it doesn't exist.
-		match fs::create_dir_all(service.snapshot_dir()) {
-			Err(e) => {
-				if e.kind() != ErrorKind::AlreadyExists {
-					return Err(e.into())
-				}
+		if let Err(e) = fs::create_dir_all(service.snapshot_dir()) {
+			if e.kind() != ErrorKind::AlreadyExists {
+				return Err(e.into())
 			}
-			_ => {}
 		}

 		// delete the temporary restoration dir if it does exist.
-		match fs::remove_dir_all(service.restoration_dir()) {
-			Err(e) => {
-				if e.kind() != ErrorKind::NotFound {
-					return Err(e.into())
-				}
+		if let Err(e) = fs::remove_dir_all(service.restoration_dir()) {
+			if e.kind() != ErrorKind::NotFound {
+				return Err(e.into())
 			}
-			_ => {}
 		}

 		Ok(service)
@@ -434,4 +428,4 @@ impl SnapshotService for Service {
 		self.io_channel.send(ClientIoMessage::FeedBlockChunk(hash, chunk))
 			.expect("snapshot service and io service are kept alive by client service; qed");
 	}
-}
+}
--- a/ethcore/src/snapshot/tests/blocks.rs
+++ b/ethcore/src/snapshot/tests/blocks.rs
@@ -20,7 +20,7 @@ use devtools::RandomTempPath;

 use blockchain::generator::{ChainGenerator, ChainIterator, BlockFinalizer};
 use blockchain::BlockChain;
-use snapshot::{chunk_blocks, BlockRebuilder};
+use snapshot::{chunk_blocks, BlockRebuilder, Progress};
 use snapshot::io::{PackedReader, PackedWriter, SnapshotReader, SnapshotWriter};

 use util::{Mutex, snappy};
@@ -55,7 +55,7 @@ fn chunk_and_restore(amount: u64) {

 	// snapshot it.
 	let writer = Mutex::new(PackedWriter::new(&snapshot_path).unwrap());
-	let block_hashes = chunk_blocks(&bc, (amount, best_hash), &writer).unwrap();
+	let block_hashes = chunk_blocks(&bc, (amount, best_hash), &writer, &Progress::default()).unwrap();
 	writer.into_inner().finish(::snapshot::ManifestData {
 		state_hashes: Vec::new(),
 		block_hashes: block_hashes,
@@ -88,4 +88,4 @@ fn chunk_and_restore(amount: u64) {
 fn chunk_and_restore_500() { chunk_and_restore(500) }

 #[test]
-fn chunk_and_restore_40k() { chunk_and_restore(40000) }
+fn chunk_and_restore_40k() { chunk_and_restore(40000) }
--- a/ethcore/src/snapshot/tests/helpers.rs
+++ b/ethcore/src/snapshot/tests/helpers.rs
@@ -116,7 +116,7 @@ pub fn fill_storage(mut db: AccountDBMut, root: &mut H256, seed: &mut H256) {
 pub fn compare_dbs(one: &HashDB, two: &HashDB) {
 	let keys = one.keys();

-	for (key, _) in keys {
+	for key in keys.keys() {
 		assert_eq!(one.get(&key).unwrap(), two.get(&key).unwrap());
 	}
-}
+}
--- a/ethcore/src/snapshot/tests/state.rs
+++ b/ethcore/src/snapshot/tests/state.rs
@@ -16,7 +16,7 @@

 //! State snapshotting tests.

-use snapshot::{chunk_state, StateRebuilder};
+use snapshot::{chunk_state, Progress, StateRebuilder};
 use snapshot::io::{PackedReader, PackedWriter, SnapshotReader, SnapshotWriter};
 use super::helpers::{compare_dbs, StateProducer};

@@ -48,7 +48,7 @@ fn snap_and_restore() {
 	let state_root = producer.state_root();
 	let writer = Mutex::new(PackedWriter::new(&snap_file).unwrap());

-	let state_hashes = chunk_state(&old_db, &state_root, &writer).unwrap();
+	let state_hashes = chunk_state(&old_db, &state_root, &writer, &Progress::default()).unwrap();

 	writer.into_inner().finish(::snapshot::ManifestData {
 		state_hashes: state_hashes,
@@ -79,4 +79,4 @@ fn snap_and_restore() {
 	let new_db = journaldb::new(db, Algorithm::Archive, ::client::DB_COL_STATE);

 	compare_dbs(&old_db, new_db.as_hashdb());
-}
+}
--- a/ethcore/src/spec/spec.rs
+++ b/ethcore/src/spec/spec.rs
@@ -20,6 +20,7 @@ use common::*;
 use engines::{Engine, NullEngine, InstantSeal, BasicAuthority};
 use pod_state::*;
 use account_db::*;
+use state_db::StateDB;
 use super::genesis::Genesis;
 use super::seal::Generic as GenericSeal;
 use ethereum;
@@ -229,19 +230,20 @@ impl Spec {
 	}

 	/// Ensure that the given state DB has the trie nodes in for the genesis state.
-	pub fn ensure_db_good(&self, db: &mut HashDB) -> Result<bool, Box<TrieError>> {
-		if !db.contains(&self.state_root()) {
+	pub fn ensure_db_good(&self, db: &mut StateDB) -> Result<bool, Box<TrieError>> {
+		if !db.as_hashdb().contains(&self.state_root()) {
 			let mut root = H256::new();
 			{
-				let mut t = SecTrieDBMut::new(db, &mut root);
+				let mut t = SecTrieDBMut::new(db.as_hashdb_mut(), &mut root);
 				for (address, account) in self.genesis_state.get().iter() {
 					try!(t.insert(address.as_slice(), &account.rlp()));
 				}
 			}
 			for (address, account) in self.genesis_state.get().iter() {
-				account.insert_additional(&mut AccountDBMut::new(db, address));
+				db.note_account_bloom(address);
+				account.insert_additional(&mut AccountDBMut::new(db.as_hashdb_mut(), address));
 			}
-			assert!(db.contains(&self.state_root()));
+			assert!(db.as_hashdb().contains(&self.state_root()));
 			Ok(true)
 		} else { Ok(false) }
 	}
--- a/ethcore/src/state.rs
+++ b/ethcore/src/state.rs
@@ -25,6 +25,7 @@ use trace::FlatTrace;
 use pod_account::*;
 use pod_state::{self, PodState};
 use types::state_diff::StateDiff;
+use state_db::StateDB;

 /// Used to return information about an `State::apply` operation.
 pub struct ApplyOutcome {
@@ -37,23 +38,92 @@ pub struct ApplyOutcome {
 /// Result type for the execution ("application") of a transaction.
 pub type ApplyResult = Result<ApplyOutcome, Error>;

+#[derive(Debug)]
+enum AccountEntry {
+	/// Contains account data.
+	Cached(Account),
+	/// Account has been deleted.
+	Killed,
+	/// Account does not exist.
+	Missing,
+}
+
+impl AccountEntry {
+	fn is_dirty(&self) -> bool {
+		match *self {
+			AccountEntry::Cached(ref a) => a.is_dirty(),
+			AccountEntry::Killed => true,
+			AccountEntry::Missing => false,
+		}
+	}
+
+	/// Clone dirty data into new `AccountEntry`.
+	/// Returns None if clean.
+	fn clone_dirty(&self) -> Option<AccountEntry> {
+		match *self {
+			AccountEntry::Cached(ref acc) if acc.is_dirty() => Some(AccountEntry::Cached(acc.clone_dirty())),
+			AccountEntry::Killed => Some(AccountEntry::Killed),
+			_ => None,
+		}
+	}
+
+	/// Clone account entry data that needs to be saved in the snapshot.
+	/// This includes basic account information and all locally cached storage keys
+	fn clone_for_snapshot(&self) -> AccountEntry {
+		match *self {
+			AccountEntry::Cached(ref acc) => AccountEntry::Cached(acc.clone_all()),
+			AccountEntry::Killed => AccountEntry::Killed,
+			AccountEntry::Missing => AccountEntry::Missing,
+		}
+	}
+}
+
 /// Representation of the entire state of all accounts in the system.
+///
+/// `State` can work together with `StateDB` to share account cache.
+///
+/// Local cache contains changes made locally and changes accumulated
+/// locally from previous commits. Global cache reflects the database
+/// state and never contains any changes.
+///
+/// Account data can be in the following cache states:
+/// * In global but not local - something that was queried from the database,
+/// but never modified
+/// * In local but not global - something that was just added (e.g. new account)
+/// * In both with the same value - something that was changed to a new value,
+/// but changed back to a previous block in the same block (same State instance)
+/// * In both with different values - something that was overwritten with a
+/// new value.
+///
+/// All read-only state queries check local cache/modifications first,
+/// then global state cache. If data is not found in any of the caches
+/// it is loaded from the DB to the local cache.
+///
+/// Upon destruction all the local cache data merged into the global cache.
+/// The merge might be rejected if current state is non-canonical.
 pub struct State {
-	db: Box<JournalDB>,
+	db: StateDB,
 	root: H256,
-	cache: RefCell<HashMap<Address, Option<Account>>>,
-	snapshots: RefCell<Vec<HashMap<Address, Option<Option<Account>>>>>,
+	cache: RefCell<HashMap<Address, AccountEntry>>,
+	snapshots: RefCell<Vec<HashMap<Address, Option<AccountEntry>>>>,
 	account_start_nonce: U256,
 	trie_factory: TrieFactory,
 }

+#[derive(Copy, Clone)]
+enum RequireCache {
+	None,
+	CodeSize,
+	Code,
+}
+
 const SEC_TRIE_DB_UNWRAP_STR: &'static str = "A state can only be created with valid root. Creating a SecTrieDB with a valid root will not fail. \
 			 Therefore creating a SecTrieDB with this state's root will not fail.";

 impl State {
 	/// Creates new state with empty state root
 	#[cfg(test)]
-	pub fn new(mut db: Box<JournalDB>, account_start_nonce: U256, trie_factory: TrieFactory) -> State {
+	pub fn new(mut db: StateDB, account_start_nonce: U256, trie_factory: TrieFactory) -> State {
 		let mut root = H256::new();
 		{
 			// init trie and reset root too null
@@ -71,7 +141,7 @@ impl State {
 	}

 	/// Creates new state with existing state root
-	pub fn from_existing(db: Box<JournalDB>, root: H256, account_start_nonce: U256, trie_factory: TrieFactory) -> Result<State, TrieError> {
+	pub fn from_existing(db: StateDB, root: H256, account_start_nonce: U256, trie_factory: TrieFactory) -> Result<State, TrieError> {
 		if !db.as_hashdb().contains(&root) {
 			return Err(TrieError::InvalidStateRoot(root));
 		}
@@ -115,14 +185,21 @@ impl State {
 						self.cache.borrow_mut().insert(k, v);
 					},
 					None => {
-						self.cache.borrow_mut().remove(&k);
+						match self.cache.borrow_mut().entry(k) {
+							::std::collections::hash_map::Entry::Occupied(e) => {
+								if e.get().is_dirty() {
+									e.remove();
+								}
+							},
+							_ => {}
+						}
 					}
 				}
 			}
 		}
 	}

-	fn insert_cache(&self, address: &Address, account: Option<Account>) {
+	fn insert_cache(&self, address: &Address, account: AccountEntry) {
 		if let Some(ref mut snapshot) = self.snapshots.borrow_mut().last_mut() {
 			if !snapshot.contains_key(address) {
 				snapshot.insert(address.clone(), self.cache.borrow_mut().insert(address.clone(), account));
@@ -135,13 +212,14 @@ impl State {
 	fn note_cache(&self, address: &Address) {
 		if let Some(ref mut snapshot) = self.snapshots.borrow_mut().last_mut() {
 			if !snapshot.contains_key(address) {
-				snapshot.insert(address.clone(), self.cache.borrow().get(address).cloned());
+				snapshot.insert(address.clone(), self.cache.borrow().get(address).map(AccountEntry::clone_for_snapshot));
 			}
 		}
 	}

 	/// Destroy the current object and return root and database.
-	pub fn drop(self) -> (H256, Box<JournalDB>) {
+	pub fn drop(mut self) -> (H256, StateDB) {
+		self.commit_cache();
 		(self.root, self.db)
 	}

@@ -153,41 +231,100 @@ impl State {
 	/// Create a new contract at address `contract`. If there is already an account at the address
 	/// it will have its code reset, ready for `init_code()`.
 	pub fn new_contract(&mut self, contract: &Address, balance: U256) {
-		self.insert_cache(contract, Some(Account::new_contract(balance, self.account_start_nonce)));
+		self.insert_cache(contract, AccountEntry::Cached(Account::new_contract(balance, self.account_start_nonce)));
 	}

 	/// Remove an existing account.
 	pub fn kill_account(&mut self, account: &Address) {
-		self.insert_cache(account, None);
+		self.insert_cache(account, AccountEntry::Killed);
 	}

 	/// Determine whether an account exists.
 	pub fn exists(&self, a: &Address) -> bool {
-		self.ensure_cached(a, false, |a| a.is_some())
+		self.ensure_cached(a, RequireCache::None, |a| a.is_some())
 	}

 	/// Get the balance of account `a`.
 	pub fn balance(&self, a: &Address) -> U256 {
-		self.ensure_cached(a, false,
+		self.ensure_cached(a, RequireCache::None,
 			|a| a.as_ref().map_or(U256::zero(), |account| *account.balance()))
 	}

 	/// Get the nonce of account `a`.
 	pub fn nonce(&self, a: &Address) -> U256 {
-		self.ensure_cached(a, false,
+		self.ensure_cached(a, RequireCache::None,
 			|a| a.as_ref().map_or(self.account_start_nonce, |account| *account.nonce()))
 	}

 	/// Mutate storage of account `address` so that it is `value` for `key`.
 	pub fn storage_at(&self, address: &Address, key: &H256) -> H256 {
-		self.ensure_cached(address, false,
-			|a| a.as_ref().map_or(H256::new(), |a|a.storage_at(&AccountDB::new(self.db.as_hashdb(), address), key)))
+		// Storage key search and update works like this:
+		// 1. Check bloom to see if account never used surely
+		// 2. If there's an entry for the account in the local cache check for the key and return it if found.
+		// 3. If there's an entry for the account in the global cache check for the key or load it into that account.
+		// 4. If account is missing in the global cache load it into the local cache and cache the key there.
+
+		// check bloom
+
+		// check local cache first without updating
+		{
+			let local_cache = self.cache.borrow_mut();
+			let mut local_account = None;
+			if let Some(maybe_acc) = local_cache.get(address) {
+				match *maybe_acc {
+					AccountEntry::Cached(ref account) => {
+						if let Some(value) = account.cached_storage_at(key) {
+							return value;
+						} else {
+							local_account = Some(maybe_acc);
+						}
+					},
+					_ => return H256::new(),
+				}
+			}
+			// check the global cache and and cache storage key there if found,
+			// otherwise cache the account localy and cache storage key there.
+			if let Some(result) = self.db.get_cached(address, |acc| acc.map_or(H256::new(), |a| a.storage_at(&AccountDB::from_hash(self.db.as_hashdb(), a.address_hash(address)), key))) {
+				return result;
+			}
+			if let Some(ref mut acc) = local_account {
+				if let AccountEntry::Cached(ref account) = **acc {
+					return account.storage_at(&AccountDB::from_hash(self.db.as_hashdb(), account.address_hash(address)), key)
+				} else {
+					return H256::new()
+				}
+			}
+		}
+		// account is not found in the global cache, get from the DB and insert into local
+		if !self.db.check_account_bloom(address) { return H256::zero() }
+		let db = self.trie_factory.readonly(self.db.as_hashdb(), &self.root).expect(SEC_TRIE_DB_UNWRAP_STR);
+		let maybe_acc = match db.get(address) {
+			Ok(acc) => acc.map(Account::from_rlp),
+			Err(e) => panic!("Potential DB corruption encountered: {}", e),
+		};
+		let r = maybe_acc.as_ref().map_or(H256::new(), |a| a.storage_at(&AccountDB::from_hash(self.db.as_hashdb(), a.address_hash(address)), key));
+		match maybe_acc {
+			Some(account) => self.insert_cache(address, AccountEntry::Cached(account)),
+			None => self.insert_cache(address, AccountEntry::Missing),
+		}
+		r
 	}

-	/// Mutate storage of account `a` so that it is `value` for `key`.
-	pub fn code(&self, a: &Address) -> Option<Bytes> {
-		self.ensure_cached(a, true,
-			|a| a.as_ref().map_or(None, |a|a.code().map(|x|x.to_vec())))
+	/// Get accounts' code.
+	pub fn code(&self, a: &Address) -> Option<Arc<Bytes>> {
+		self.ensure_cached(a, RequireCache::Code,
+			|a| a.as_ref().map_or(None, |a| a.code().clone()))
+	}
+
+	pub fn code_hash(&self, a: &Address) -> H256 {
+		self.ensure_cached(a, RequireCache::None,
+			|a| a.as_ref().map_or(SHA3_EMPTY, |a| a.code_hash()))
+	}
+
+	/// Get accounts' code size.
+	pub fn code_size(&self, a: &Address) -> Option<u64> {
+		self.ensure_cached(a, RequireCache::CodeSize,
+			|a| a.as_ref().and_then(|a| a.code_size()))
 	}

 	/// Add `incr` to the balance of account `a`.
@@ -241,26 +378,26 @@ impl State {
 //		trace!("Applied transaction. Diff:\n{}\n", state_diff::diff_pod(&old, &self.to_pod()));
 		try!(self.commit());
 		let receipt = Receipt::new(self.root().clone(), e.cumulative_gas_used, e.logs);
-//		trace!("Transaction receipt: {:?}", receipt);
+		trace!(target: "state", "Transaction receipt: {:?}", receipt);
 		Ok(ApplyOutcome{receipt: receipt, trace: e.trace})
 	}

 	/// Commit accounts to SecTrieDBMut. This is similar to cpp-ethereum's dev::eth::commit.
 	/// `accounts` is mutable because we may need to commit the code or storage and record that.
 	#[cfg_attr(feature="dev", allow(match_ref_pats))]
-	pub fn commit_into(
+	fn commit_into(
 		trie_factory: &TrieFactory,
-		db: &mut HashDB,
+		db: &mut StateDB,
 		root: &mut H256,
-		accounts: &mut HashMap<Address,
-		Option<Account>>
+		accounts: &mut HashMap<Address, AccountEntry>
 	) -> Result<(), Error> {
 		// first, commit the sub trees.
 		// TODO: is this necessary or can we dispense with the `ref mut a` for just `a`?
 		for (address, ref mut a) in accounts.iter_mut() {
 			match a {
-				&mut&mut Some(ref mut account) if account.is_dirty() => {
-					let mut account_db = AccountDBMut::new(db, address);
+				&mut&mut AccountEntry::Cached(ref mut account) if account.is_dirty() => {
+					db.note_account_bloom(&address);
+					let mut account_db = AccountDBMut::from_hash(db.as_hashdb_mut(), account.address_hash(address));
 					account.commit_storage(trie_factory, &mut account_db);
 					account.commit_code(&mut account_db);
 				}
@@ -269,15 +406,18 @@ impl State {
 		}

 		{
-			let mut trie = trie_factory.from_existing(db, root).unwrap();
+			let mut trie = trie_factory.from_existing(db.as_hashdb_mut(), root).unwrap();
 			for (address, ref mut a) in accounts.iter_mut() {
 				match **a {
-					Some(ref mut account) if account.is_dirty() => {
+					AccountEntry::Cached(ref mut account) if account.is_dirty() => {
 						account.set_clean();
-						try!(trie.insert(address, &account.rlp()))
+						try!(trie.insert(address, &account.rlp()));
 					},
-					None => try!(trie.remove(address)),
-					_ => (),
+					AccountEntry::Killed => {
+						try!(trie.remove(address));
+						**a = AccountEntry::Missing;
+					},
+					_ => {},
 				}
 			}
 		}
@@ -285,10 +425,27 @@ impl State {
 		Ok(())
 	}

+	fn commit_cache(&mut self) {
+		let mut addresses = self.cache.borrow_mut();
+		for (address, a) in addresses.drain() {
+			match a {
+				AccountEntry::Cached(account) => {
+					if !account.is_dirty() {
+						self.db.cache_account(address, Some(account));
+					}
+				},
+				AccountEntry::Missing => {
+					self.db.cache_account(address, None);
+				},
+				_ => {},
+			}
+		}
+	}
+
 	/// Commits our cached account changes into the trie.
 	pub fn commit(&mut self) -> Result<(), Error> {
 		assert!(self.snapshots.borrow().is_empty());
-		Self::commit_into(&self.trie_factory, self.db.as_hashdb_mut(), &mut self.root, &mut *self.cache.borrow_mut())
+		Self::commit_into(&self.trie_factory, &mut self.db, &mut self.root, &mut *self.cache.borrow_mut())
 	}

 	/// Clear state cache
@@ -302,7 +459,8 @@ impl State {
 	pub fn populate_from(&mut self, accounts: PodState) {
 		assert!(self.snapshots.borrow().is_empty());
 		for (add, acc) in accounts.drain().into_iter() {
-			self.cache.borrow_mut().insert(add, Some(Account::from_pod(acc)));
+			self.db.note_account_bloom(&add);
+			self.cache.borrow_mut().insert(add, AccountEntry::Cached(Account::from_pod(acc)));
 		}
 	}

@@ -312,7 +470,7 @@ impl State {
 		// TODO: handle database rather than just the cache.
 		// will need fat db.
 		PodState::from(self.cache.borrow().iter().fold(BTreeMap::new(), |mut m, (add, opt)| {
-			if let Some(ref acc) = *opt {
+			if let AccountEntry::Cached(ref acc) = *opt {
 				m.insert(add.clone(), PodAccount::from_account(acc));
 			}
 			m
@@ -321,7 +479,7 @@ impl State {

 	fn query_pod(&mut self, query: &PodState) {
 		for (ref address, ref pod_account) in query.get() {
-			self.ensure_cached(address, true, |a| {
+			self.ensure_cached(address, RequireCache::Code, |a| {
 				if a.is_some() {
 					for key in pod_account.storage.keys() {
 						self.storage_at(address, key);
@@ -340,26 +498,61 @@ impl State {
 		pod_state::diff_pod(&state_pre.to_pod(), &pod_state_post)
 	}

-	/// Ensure account `a` is in our cache of the trie DB and return a handle for getting it.
-	/// `require_code` requires that the code be cached, too.
-	fn ensure_cached<'a, F, U>(&'a self, a: &'a Address, require_code: bool, f: F) -> U
-		where F: FnOnce(&Option<Account>) -> U {
-		let have_key = self.cache.borrow().contains_key(a);
-		if !have_key {
-			let db = self.trie_factory.readonly(self.db.as_hashdb(), &self.root).expect(SEC_TRIE_DB_UNWRAP_STR);
-			let maybe_acc = match db.get(&a) {
-				Ok(acc) => acc.map(Account::from_rlp),
-				Err(e) => panic!("Potential DB corruption encountered: {}", e),
-			};
-			self.insert_cache(a, maybe_acc);
-		}
-		if require_code {
-			if let Some(ref mut account) = self.cache.borrow_mut().get_mut(a).unwrap().as_mut() {
-				account.cache_code(&AccountDB::new(self.db.as_hashdb(), a));
+	fn update_account_cache(require: RequireCache, account: &mut Account, address: &Address, db: &HashDB) {
+		match require {
+			RequireCache::None => {},
+			RequireCache::Code => {
+				let address_hash = account.address_hash(address);
+				account.cache_code(&AccountDB::from_hash(db, address_hash));
+			}
+			RequireCache::CodeSize => {
+				let address_hash = account.address_hash(address);
+				account.cache_code_size(&AccountDB::from_hash(db, address_hash));
 			}
 		}
+	}

-		f(self.cache.borrow().get(a).unwrap())
+	/// Check caches for required data
+	/// First searches for account in the local, then the shared cache.
+	/// Populates local cache if nothing found.
+	fn ensure_cached<F, U>(&self, a: &Address, require: RequireCache, f: F) -> U
+		where F: Fn(Option<&Account>) -> U {
+		// check local cache first
+		if let Some(ref mut maybe_acc) = self.cache.borrow_mut().get_mut(a) {
+			if let AccountEntry::Cached(ref mut account) = **maybe_acc {
+				Self::update_account_cache(require, account, a, self.db.as_hashdb());
+				return f(Some(account));
+			}
+			return f(None);
+		}
+		// check global cache
+		let result = self.db.get_cached(a, |mut acc| {
+			if let Some(ref mut account) = acc {
+				Self::update_account_cache(require, account, a, self.db.as_hashdb());
+			}
+			f(acc.map(|a| &*a))
+		});
+		match result {
+			Some(r) => r,
+			None => {
+				// not found in the global cache, get from the DB and insert into local
+				if !self.db.check_account_bloom(a) { return f(None); }
+				let db = self.trie_factory.readonly(self.db.as_hashdb(), &self.root).expect(SEC_TRIE_DB_UNWRAP_STR);
+				let mut maybe_acc = match db.get(a) {
+					Ok(acc) => acc.map(Account::from_rlp),
+					Err(e) => panic!("Potential DB corruption encountered: {}", e),
+				};
+				if let Some(ref mut account) = maybe_acc.as_mut() {
+					Self::update_account_cache(require, account, a, self.db.as_hashdb());
+				}
+				let r = f(maybe_acc.as_ref());
+				match maybe_acc {
+					Some(account) => self.insert_cache(a, AccountEntry::Cached(account)),
+					None => self.insert_cache(a, AccountEntry::Missing),
+				}
+				r
+			}
+		}
 	}

 	/// Pull account `a` in our cache from the trie DB. `require_code` requires that the code be cached, too.
@@ -374,28 +567,45 @@ impl State {
 	{
 		let contains_key = self.cache.borrow().contains_key(a);
 		if !contains_key {
-			let db = self.trie_factory.readonly(self.db.as_hashdb(), &self.root).expect(SEC_TRIE_DB_UNWRAP_STR);
-			let maybe_acc = match db.get(&a) {
-				Ok(acc) => acc.map(Account::from_rlp),
-				Err(e) => panic!("Potential DB corruption encountered: {}", e),
-			};
-
-			self.insert_cache(a, maybe_acc);
+			match self.db.get_cached_account(a) {
+				Some(Some(acc)) => self.insert_cache(a, AccountEntry::Cached(acc)),
+				Some(None) => self.insert_cache(a, AccountEntry::Missing),
+				None => {
+					let maybe_acc = if self.db.check_account_bloom(a) {
+						let db = self.trie_factory.readonly(self.db.as_hashdb(), &self.root).expect(SEC_TRIE_DB_UNWRAP_STR);
+						let maybe_acc = match db.get(a) {
+							Ok(Some(acc)) => AccountEntry::Cached(Account::from_rlp(acc)),
+							Ok(None) => AccountEntry::Missing,
+							Err(e) => panic!("Potential DB corruption encountered: {}", e),
+						};
+						maybe_acc
+					}
+					else {
+						AccountEntry::Missing
+					};
+					self.insert_cache(a, maybe_acc);
+				}
+			}
 		} else {
 			self.note_cache(a);
 		}

 		match self.cache.borrow_mut().get_mut(a).unwrap() {
-			&mut Some(ref mut acc) => not_default(acc),
-			slot @ &mut None => *slot = Some(default()),
+			&mut AccountEntry::Cached(ref mut acc) => not_default(acc),
+			slot => *slot = AccountEntry::Cached(default()),
 		}

 		RefMut::map(self.cache.borrow_mut(), |c| {
-			let account = c.get_mut(a).unwrap().as_mut().unwrap();
-			if require_code {
-				account.cache_code(&AccountDB::new(self.db.as_hashdb(), a));
+			match c.get_mut(a).unwrap() {
+				&mut AccountEntry::Cached(ref mut account) => {
+					if require_code {
+						let addr_hash = account.address_hash(a);
+						account.cache_code(&AccountDB::from_hash(self.db.as_hashdb(), addr_hash));
+					}
+					account
+				},
+				_ => panic!("Required account must always exist; qed"),
 			}
-			account
 		})
 	}
 }
@@ -408,11 +618,21 @@ impl fmt::Debug for State {

 impl Clone for State {
 	fn clone(&self) -> State {
+		let cache = {
+			let mut cache: HashMap<Address, AccountEntry> = HashMap::new();
+			for (key, val) in self.cache.borrow().iter() {
+				if let Some(entry) = val.clone_dirty() {
+					cache.insert(key.clone(), entry);
+				}
+			}
+			cache
+		};
+
 		State {
 			db: self.db.boxed_clone(),
 			root: self.root.clone(),
-			cache: RefCell::new(self.cache.borrow().clone()),
-			snapshots: RefCell::new(self.snapshots.borrow().clone()),
+			cache: RefCell::new(cache),
+			snapshots: RefCell::new(Vec::new()),
 			account_start_nonce: self.account_start_nonce.clone(),
 			trie_factory: self.trie_factory.clone(),
 		}
@@ -630,7 +850,7 @@ fn should_trace_call_transaction_to_builtin() {

 	let mut info = EnvInfo::default();
 	info.gas_limit = 1_000_000.into();
-	let engine = Spec::new_test().engine;
+	let engine = &*Spec::new_test().engine;

 	let t = Transaction {
 		nonce: 0.into(),
@@ -642,7 +862,7 @@ fn should_trace_call_transaction_to_builtin() {
 	}.sign(&"".sha3());

 	let vm_factory = Default::default();
-	let result = state.apply(&info, engine.deref(), &vm_factory, &t, true).unwrap();
+	let result = state.apply(&info, engine, &vm_factory, &t, true).unwrap();

 	let expected_trace = vec![FlatTrace {
 		trace_address: Default::default(),
@@ -673,7 +893,7 @@ fn should_not_trace_subcall_transaction_to_builtin() {

 	let mut info = EnvInfo::default();
 	info.gas_limit = 1_000_000.into();
-	let engine = Spec::new_test().engine;
+	let engine = &*Spec::new_test().engine;

 	let t = Transaction {
 		nonce: 0.into(),
@@ -686,7 +906,7 @@ fn should_not_trace_subcall_transaction_to_builtin() {

 	state.init_code(&0xa.into(), FromHex::from_hex("600060006000600060006001610be0f1").unwrap());
 	let vm_factory = Default::default();
-	let result = state.apply(&info, engine.deref(), &vm_factory, &t, true).unwrap();
+	let result = state.apply(&info, engine, &vm_factory, &t, true).unwrap();

 	let expected_trace = vec![FlatTrace {
 		trace_address: Default::default(),
@@ -717,7 +937,7 @@ fn should_not_trace_callcode() {

 	let mut info = EnvInfo::default();
 	info.gas_limit = 1_000_000.into();
-	let engine = Spec::new_test().engine;
+	let engine = &*Spec::new_test().engine;

 	let t = Transaction {
 		nonce: 0.into(),
@@ -731,7 +951,7 @@ fn should_not_trace_callcode() {
 	state.init_code(&0xa.into(), FromHex::from_hex("60006000600060006000600b611000f2").unwrap());
 	state.init_code(&0xb.into(), FromHex::from_hex("6000").unwrap());
 	let vm_factory = Default::default();
-	let result = state.apply(&info, engine.deref(), &vm_factory, &t, true).unwrap();
+	let result = state.apply(&info, engine, &vm_factory, &t, true).unwrap();

 	let expected_trace = vec![FlatTrace {
 		trace_address: Default::default(),
@@ -778,7 +998,7 @@ fn should_not_trace_delegatecall() {
 	let mut info = EnvInfo::default();
 	info.gas_limit = 1_000_000.into();
 	info.number = 0x789b0;
-	let engine = Spec::new_test().engine;
+	let engine = &*Spec::new_test().engine;

 	println!("schedule.have_delegate_call: {:?}", engine.schedule(&info).have_delegate_call);

@@ -794,7 +1014,7 @@ fn should_not_trace_delegatecall() {
 	state.init_code(&0xa.into(), FromHex::from_hex("6000600060006000600b618000f4").unwrap());
 	state.init_code(&0xb.into(), FromHex::from_hex("6000").unwrap());
 	let vm_factory = Default::default();
-	let result = state.apply(&info, engine.deref(), &vm_factory, &t, true).unwrap();
+	let result = state.apply(&info, engine, &vm_factory, &t, true).unwrap();

 	let expected_trace = vec![FlatTrace {
 		trace_address: Default::default(),
@@ -1302,14 +1522,14 @@ fn code_from_database() {
 		let mut state = get_temp_state_in(temp.as_path());
 		state.require_or_from(&a, false, ||Account::new_contract(42.into(), 0.into()), |_|{});
 		state.init_code(&a, vec![1, 2, 3]);
-		assert_eq!(state.code(&a), Some([1u8, 2, 3].to_vec()));
+		assert_eq!(state.code(&a), Some(Arc::new([1u8, 2, 3].to_vec())));
 		state.commit().unwrap();
-		assert_eq!(state.code(&a), Some([1u8, 2, 3].to_vec()));
+		assert_eq!(state.code(&a), Some(Arc::new([1u8, 2, 3].to_vec())));
 		state.drop()
 	};

 	let state = State::from_existing(db, root, U256::from(0u8), Default::default()).unwrap();
-	assert_eq!(state.code(&a), Some([1u8, 2, 3].to_vec()));
+	assert_eq!(state.code(&a), Some(Arc::new([1u8, 2, 3].to_vec())));
 }

 #[test]
@@ -1489,4 +1709,4 @@ fn create_empty() {
 	assert_eq!(state.root().hex(), "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421");
 }

-}
+}
--- a/ethcore/src/state_db.rs
+++ b/ethcore/src/state_db.rs
@@ -0,0 +1,231 @@
+// 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 lru_cache::LruCache;
+use util::journaldb::JournalDB;
+use util::hash::{H256};
+use util::hashdb::HashDB;
+use util::{Arc, Address, DBTransaction, UtilError, Mutex, Hashable, BytesConvertable};
+use account::Account;
+use bloomfilter::{Bloom, BloomJournal};
+use util::Database;
+use client::DB_COL_ACCOUNT_BLOOM;
+use byteorder::{LittleEndian, ByteOrder};
+
+const STATE_CACHE_ITEMS: usize = 65536;
+
+struct AccountCache {
+	/// DB Account cache. `None` indicates that account is known to be missing.
+	accounts: LruCache<Address, Option<Account>>,
+}
+
+/// State database abstraction.
+/// Manages shared global state cache.
+/// A clone of `StateDB` may be created as canonical or not.
+/// For canonical clones cache changes are accumulated and applied
+/// on commit.
+/// For non-canonical clones cache is cleared on commit.
+pub struct StateDB {
+	db: Box<JournalDB>,
+	account_cache: Arc<Mutex<AccountCache>>,
+	cache_overlay: Vec<(Address, Option<Account>)>,
+	is_canon: bool,
+	account_bloom: Arc<Mutex<Bloom>>,
+}
+
+pub const ACCOUNT_BLOOM_SPACE: usize = 1048576;
+pub const DEFAULT_ACCOUNT_PRESET: usize = 1000000;
+
+pub const ACCOUNT_BLOOM_HASHCOUNT_KEY: &'static [u8] = b"account_hash_count";
+
+impl StateDB {
+	pub fn load_bloom(db: &Database) -> Bloom {
+		let hash_count_entry = db.get(DB_COL_ACCOUNT_BLOOM, ACCOUNT_BLOOM_HASHCOUNT_KEY)
+			.expect("Low-level database error");
+
+		if hash_count_entry.is_none() {
+			return Bloom::new(ACCOUNT_BLOOM_SPACE, DEFAULT_ACCOUNT_PRESET);
+		}
+		let hash_count_bytes = hash_count_entry.unwrap();
+		assert_eq!(hash_count_bytes.len(), 1);
+		let hash_count = hash_count_bytes[0];
+
+		let mut bloom_parts = vec![0u64; ACCOUNT_BLOOM_SPACE / 8];
+		let mut key = [0u8; 8];
+		for i in 0..ACCOUNT_BLOOM_SPACE / 8 {
+			LittleEndian::write_u64(&mut key, i as u64);
+			bloom_parts[i] = db.get(DB_COL_ACCOUNT_BLOOM, &key).expect("low-level database error")
+				.and_then(|val| Some(LittleEndian::read_u64(&val[..])))
+				.unwrap_or(0u64);
+		}
+
+		let bloom = Bloom::from_parts(&bloom_parts, hash_count as u32);
+		trace!(target: "account_bloom", "Bloom is {:?} full, hash functions count = {:?}", bloom.how_full(), hash_count);
+		bloom
+	}
+
+	/// Create a new instance wrapping `JournalDB`
+	pub fn new(db: Box<JournalDB>) -> StateDB {
+		let bloom = Self::load_bloom(db.backing());
+		StateDB {
+			db: db,
+			account_cache: Arc::new(Mutex::new(AccountCache { accounts: LruCache::new(STATE_CACHE_ITEMS) })),
+			cache_overlay: Vec::new(),
+			is_canon: false,
+			account_bloom: Arc::new(Mutex::new(bloom)),
+		}
+	}
+
+	pub fn check_account_bloom(&self, address: &Address) -> bool {
+		trace!(target: "account_bloom", "Check account bloom: {:?}", address);
+		let bloom = self.account_bloom.lock();
+		bloom.check(address.sha3().as_slice())
+	}
+
+	pub fn note_account_bloom(&self, address: &Address) {
+		trace!(target: "account_bloom", "Note account bloom: {:?}", address);
+		let mut bloom = self.account_bloom.lock();
+		bloom.set(address.sha3().as_slice());
+	}
+
+	pub fn commit_bloom(batch: &DBTransaction, journal: BloomJournal) -> Result<(), UtilError> {
+		assert!(journal.hash_functions <= 255);
+		try!(batch.put(DB_COL_ACCOUNT_BLOOM, ACCOUNT_BLOOM_HASHCOUNT_KEY, &vec![journal.hash_functions as u8]));
+		let mut key = [0u8; 8];
+		let mut val = [0u8; 8];
+
+		for (bloom_part_index, bloom_part_value) in journal.entries {
+			LittleEndian::write_u64(&mut key, bloom_part_index as u64);
+			LittleEndian::write_u64(&mut val, bloom_part_value);
+			try!(batch.put(DB_COL_ACCOUNT_BLOOM, &key, &val));
+		}
+		Ok(())
+	}
+
+	/// Commit all recent insert operations and canonical historical commits' removals from the
+	/// old era to the backing database, reverting any non-canonical historical commit's inserts.
+	pub fn commit(&mut self, batch: &DBTransaction, now: u64, id: &H256, end: Option<(u64, H256)>) -> Result<u32, UtilError> {
+		{
+			let mut bloom_lock = self.account_bloom.lock();
+			try!(Self::commit_bloom(batch, bloom_lock.drain_journal()));
+		}
+
+		let records = try!(self.db.commit(batch, now, id, end));
+		if self.is_canon {
+			self.commit_cache();
+		} else {
+			self.clear_cache();
+		}
+		Ok(records)
+	}
+
+	/// Returns an interface to HashDB.
+	pub fn as_hashdb(&self) -> &HashDB {
+		self.db.as_hashdb()
+	}
+
+	/// Returns an interface to mutable HashDB.
+	pub fn as_hashdb_mut(&mut self) -> &mut HashDB {
+		self.db.as_hashdb_mut()
+	}
+
+	/// Clone the database.
+	pub fn boxed_clone(&self) -> StateDB {
+		StateDB {
+			db: self.db.boxed_clone(),
+			account_cache: self.account_cache.clone(),
+			cache_overlay: Vec::new(),
+			is_canon: false,
+			account_bloom: self.account_bloom.clone(),
+		}
+	}
+
+	/// Clone the database for a canonical state.
+	pub fn boxed_clone_canon(&self) -> StateDB {
+		StateDB {
+			db: self.db.boxed_clone(),
+			account_cache: self.account_cache.clone(),
+			cache_overlay: Vec::new(),
+			is_canon: true,
+			account_bloom: self.account_bloom.clone(),
+		}
+	}
+
+	/// Check if pruning is enabled on the database.
+	pub fn is_pruned(&self) -> bool {
+		self.db.is_pruned()
+	}
+
+	/// Heap size used.
+	pub fn mem_used(&self) -> usize {
+		self.db.mem_used() //TODO: + self.account_cache.lock().heap_size_of_children()
+	}
+
+	/// Returns underlying `JournalDB`.
+	pub fn journal_db(&self) -> &JournalDB {
+		&*self.db
+	}
+
+	/// Enqueue cache change.
+	pub fn cache_account(&mut self, addr: Address, data: Option<Account>) {
+		self.cache_overlay.push((addr, data));
+	}
+
+	/// Apply pending cache changes.
+	fn commit_cache(&mut self) {
+		let mut cache = self.account_cache.lock();
+		for (address, account) in self.cache_overlay.drain(..) {
+			if let Some(&mut Some(ref mut existing)) = cache.accounts.get_mut(&address) {
+				if let Some(new) = account {
+					existing.merge_with(new);
+					continue;
+				}
+			}
+			cache.accounts.insert(address, account);
+		}
+	}
+
+	/// Clear the cache.
+	pub fn clear_cache(&mut self) {
+		self.cache_overlay.clear();
+		let mut cache = self.account_cache.lock();
+		cache.accounts.clear();
+	}
+
+	/// Get basic copy of the cached account. Does not include storage.
+	/// Returns 'None' if the state is non-canonical and cache is disabled
+	/// or if the account is not cached.
+	pub fn get_cached_account(&self, addr: &Address) -> Option<Option<Account>> {
+		if !self.is_canon {
+			return None;
+		}
+		let mut cache = self.account_cache.lock();
+		cache.accounts.get_mut(&addr).map(|a| a.as_ref().map(|a| a.clone_basic()))
+	}
+
+	/// Get value from a cached account.
+	/// Returns 'None' if the state is non-canonical and cache is disabled
+	/// or if the account is not cached.
+	pub fn get_cached<F, U>(&self, a: &Address, f: F) -> Option<U>
+		where F: FnOnce(Option<&mut Account>) -> U {
+		if !self.is_canon {
+			return None;
+		}
+		let mut cache = self.account_cache.lock();
+		cache.accounts.get_mut(a).map(|c| f(c.as_mut()))
+	}
+}
+
--- a/ethcore/src/tests/client.rs
+++ b/ethcore/src/tests/client.rs
@@ -16,6 +16,7 @@

 use io::IoChannel;
 use client::{BlockChainClient, MiningBlockChainClient, Client, ClientConfig, BlockID};
+use ethereum;
 use block::IsBlock;
 use tests::helpers::*;
 use common::*;
@@ -31,6 +32,14 @@ fn imports_from_empty() {
 	client.flush_queue();
 }

+#[test]
+fn should_return_registrar() {
+	let dir = RandomTempPath::new();
+	let spec = ethereum::new_morden();
+	let client = Client::new(ClientConfig::default(), &spec, dir.as_path(), Arc::new(Miner::with_spec(&spec)), IoChannel::disconnected()).unwrap();
+	assert_eq!(client.additional_params().get("registrar"), Some(&"8e4e9b13d4b45cb0befc93c3061b1408f67316b2".to_owned()));
+}
+
 #[test]
 fn returns_state_root_basic() {
 	let client_result = generate_dummy_client(6);
--- a/ethcore/src/tests/helpers.rs
+++ b/ethcore/src/tests/helpers.rs
@@ -18,6 +18,7 @@ use io::*;
 use client::{self, BlockChainClient, Client, ClientConfig};
 use common::*;
 use spec::*;
+use state_db::StateDB;
 use block::{OpenBlock, Drain};
 use blockchain::{BlockChain, Config as BlockChainConfig};
 use state::*;
@@ -134,11 +135,11 @@ pub fn generate_dummy_client_with_spec_and_data<F>(get_test_spec: F, block_numbe

 	let test_spec = get_test_spec();
 	let client = Client::new(ClientConfig::default(), &test_spec, dir.as_path(), Arc::new(Miner::with_spec(&test_spec)), IoChannel::disconnected()).unwrap();
-	let test_engine = &test_spec.engine;
+	let test_engine = &*test_spec.engine;

-	let mut db_result = get_temp_journal_db();
+	let mut db_result = get_temp_state_db();
 	let mut db = db_result.take();
-	test_spec.ensure_db_good(db.as_hashdb_mut()).unwrap();
+	test_spec.ensure_db_good(&mut db).unwrap();
 	let vm_factory = Default::default();
 	let genesis_header = test_spec.genesis_header();

@@ -155,7 +156,7 @@ pub fn generate_dummy_client_with_spec_and_data<F>(get_test_spec: F, block_numbe

 		// forge block.
 		let mut b = OpenBlock::new(
-			test_engine.deref(),
+			test_engine,
 			&vm_factory,
 			Default::default(),
 			false,
@@ -183,7 +184,7 @@ pub fn generate_dummy_client_with_spec_and_data<F>(get_test_spec: F, block_numbe
 			n += 1;
 		}

-		let b = b.close_and_lock().seal(test_engine.deref(), vec![]).unwrap();
+		let b = b.close_and_lock().seal(test_engine, vec![]).unwrap();

 		if let Err(e) = client.import_block(b.rlp_bytes()) {
 			panic!("error importing block which is valid by definition: {:?}", e);
@@ -303,9 +304,9 @@ pub fn generate_dummy_empty_blockchain() -> GuardedTempResult<BlockChain> {
 	}
 }

-pub fn get_temp_journal_db() -> GuardedTempResult<Box<JournalDB>> {
+pub fn get_temp_state_db() -> GuardedTempResult<StateDB> {
 	let temp = RandomTempPath::new();
-	let journal_db = get_temp_journal_db_in(temp.as_path());
+	let journal_db = get_temp_state_db_in(temp.as_path());

 	GuardedTempResult {
 		_temp: temp,
@@ -315,7 +316,7 @@ pub fn get_temp_journal_db() -> GuardedTempResult<Box<JournalDB>> {

 pub fn get_temp_state() -> GuardedTempResult<State> {
 	let temp = RandomTempPath::new();
-	let journal_db = get_temp_journal_db_in(temp.as_path());
+	let journal_db = get_temp_state_db_in(temp.as_path());

 	GuardedTempResult {
 	    _temp: temp,
@@ -323,13 +324,14 @@ pub fn get_temp_state() -> GuardedTempResult<State> {
 	}
 }

-pub fn get_temp_journal_db_in(path: &Path) -> Box<JournalDB> {
+pub fn get_temp_state_db_in(path: &Path) -> StateDB {
 	let db = new_db(path.to_str().expect("Only valid utf8 paths for tests."));
-	journaldb::new(db.clone(), journaldb::Algorithm::EarlyMerge, None)
+	let journal_db = journaldb::new(db.clone(), journaldb::Algorithm::EarlyMerge, client::DB_COL_STATE);
+	StateDB::new(journal_db)
 }

 pub fn get_temp_state_in(path: &Path) -> State {
-	let journal_db = get_temp_journal_db_in(path);
+	let journal_db = get_temp_state_db_in(path);
 	State::new(journal_db, U256::from(0), Default::default())
 }

--- a/ethcore/src/trace/db.rs
+++ b/ethcore/src/trace/db.rs
@@ -15,7 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 //! Trace database.
-use std::ops::{Deref, DerefMut};
+use std::ops::Deref;
 use std::collections::HashMap;
 use std::sync::Arc;
 use bloomchain::{Number, Config as BloomConfig};
@@ -119,8 +119,9 @@ pub struct TraceDB<T> where T: DatabaseExtras {
 impl<T> BloomGroupDatabase for TraceDB<T> where T: DatabaseExtras {
 	fn blooms_at(&self, position: &GroupPosition) -> Option<BloomGroup> {
 		let position = TraceGroupPosition::from(position.clone());
-		self.note_used(CacheID::Bloom(position.clone()));
-		self.tracesdb.read_with_cache(DB_COL_TRACE, &self.blooms, &position).map(Into::into)
+		let result = self.tracesdb.read_with_cache(DB_COL_TRACE, &self.blooms, &position).map(Into::into);
+		self.note_used(CacheID::Bloom(position));
+		result
 	}
 }

@@ -174,11 +175,13 @@ impl<T> TraceDB<T> where T: DatabaseExtras {

 	/// Ticks our cache system and throws out any old data.
 	pub fn collect_garbage(&self) {
-		let mut cache_manager = self.cache_manager.write();
-		cache_manager.collect_garbage(|| self.cache_size(), | ids | {
-			let mut traces = self.traces.write();
-			let mut blooms = self.blooms.write();
+		let current_size = self.cache_size();

+		let mut traces = self.traces.write();
+		let mut blooms = self.blooms.write();
+		let mut cache_manager = self.cache_manager.write();
+
+		cache_manager.collect_garbage(current_size, | ids | {
 			for id in &ids {
 				match *id {
 					CacheID::Trace(ref h) => { traces.remove(h); },
@@ -187,13 +190,16 @@ impl<T> TraceDB<T> where T: DatabaseExtras {
 			}
 			traces.shrink_to_fit();
 			blooms.shrink_to_fit();
+
+			traces.heap_size_of_children() + blooms.heap_size_of_children()
 		});
 	}

 	/// Returns traces for block with hash.
 	fn traces(&self, block_hash: &H256) -> Option<FlatBlockTraces> {
+		let result = self.tracesdb.read_with_cache(DB_COL_TRACE, &self.traces, block_hash);
 		self.note_used(CacheID::Trace(block_hash.clone()));
-		self.tracesdb.read_with_cache(DB_COL_TRACE, &self.traces, block_hash)
+		result
 	}

 	/// Returns vector of transaction traces for given block.
@@ -264,12 +270,12 @@ impl<T> TraceDatabase for TraceDB<T> where T: DatabaseExtras {

 		// at first, let's insert new block traces
 		{
-			// note_used must be called before locking traces to avoid cache/traces deadlock on garbage collection
-			self.note_used(CacheID::Trace(request.block_hash.clone()));
 			let mut traces = self.traces.write();
 			// it's important to use overwrite here,
 			// cause this value might be queried by hash later
-			batch.write_with_cache(DB_COL_TRACE, traces.deref_mut(), request.block_hash, request.traces, CacheUpdatePolicy::Overwrite);
+			batch.write_with_cache(DB_COL_TRACE, &mut *traces, request.block_hash, request.traces, CacheUpdatePolicy::Overwrite);
+			// note_used must be called after locking traces to avoid cache/traces deadlock on garbage collection
+			self.note_used(CacheID::Trace(request.block_hash.clone()));
 		}

 		// now let's rebuild the blooms
@@ -294,12 +300,13 @@ impl<T> TraceDatabase for TraceDB<T> where T: DatabaseExtras {
 				.map(|p| (From::from(p.0), From::from(p.1)))
 				.collect::<HashMap<TraceGroupPosition, blooms::BloomGroup>>();

-			// note_used must be called before locking blooms to avoid cache/traces deadlock on garbage collection
-			for key in blooms_to_insert.keys() {
-				self.note_used(CacheID::Bloom(key.clone()));
-			}
+			let blooms_keys: Vec<_> = blooms_to_insert.keys().cloned().collect();
 			let mut blooms = self.blooms.write();
-			batch.extend_with_cache(DB_COL_TRACE, blooms.deref_mut(), blooms_to_insert, CacheUpdatePolicy::Remove);
+			batch.extend_with_cache(DB_COL_TRACE, &mut *blooms, blooms_to_insert, CacheUpdatePolicy::Remove);
+			// note_used must be called after locking blooms to avoid cache/traces deadlock on garbage collection
+			for key in blooms_keys.into_iter() {
+				self.note_used(CacheID::Bloom(key));
+			}
 		}
 	}

--- a/ethcore/src/trace/executive_tracer.rs
+++ b/ethcore/src/trace/executive_tracer.rs
@@ -52,11 +52,12 @@ fn update_trace_address(traces: Vec<FlatTrace>) -> Vec<FlatTrace> {
 	let mut subtrace_subtraces_left = 0;
 	traces.into_iter().map(|mut trace| {
 		let is_top_subtrace = trace.trace_address.is_empty();
+		let is_subtrace = trace.trace_address.len() == 1;
 		trace.trace_address.push_front(top_subtrace_index);

 		if is_top_subtrace {
 			subtrace_subtraces_left = trace.subtraces;
-		} else {
+		} else if is_subtrace {
 			subtrace_subtraces_left -= 1;
 		}

--- a/ethcore/src/types/receipt.rs
+++ b/ethcore/src/types/receipt.rs
@@ -80,6 +80,23 @@ impl HeapSizeOf for Receipt {
 	}
 }

+/// Receipt with additional info.
+#[derive(Debug, Clone, PartialEq, Binary)]
+pub struct RichReceipt {
+	/// Transaction hash.
+	pub transaction_hash: H256,
+	/// Transaction index.
+	pub transaction_index: usize,
+	/// The total gas used in the block following execution of the transaction.
+	pub cumulative_gas_used: U256,
+	/// The gas used in the execution of the transaction. Note the difference of meaning to `Receipt::gas_used`.
+	pub gas_used: U256,
+	/// Contract address.
+	pub contract_address: Option<Address>,
+	/// Logs
+	pub logs: Vec<LogEntry>,
+}
+
 /// Receipt with additional info.
 #[derive(Debug, Clone, PartialEq, Binary)]
 pub struct LocalizedReceipt {
--- a/ethcore/src/types/trace_types/trace.rs
+++ b/ethcore/src/types/trace_types/trace.rs
@@ -181,7 +181,7 @@ impl From<ActionParams> for Create {
 			from: p.sender,
 			value: p.value.value(),
 			gas: p.gas,
-			init: p.code.unwrap_or_else(Vec::new),
+			init: p.code.map_or_else(Vec::new, |c| (*c).clone()),
 		}
 	}
 }
--- a/ethcore/src/verification/verification.rs
+++ b/ethcore/src/verification/verification.rs
@@ -40,7 +40,8 @@ pub fn verify_block_basic(header: &Header, bytes: &[u8], engine: &Engine) -> Res
 	try!(verify_header(&header, engine));
 	try!(verify_block_integrity(bytes, &header.transactions_root, &header.uncles_hash));
 	try!(engine.verify_block_basic(&header, Some(bytes)));
-	for u in Rlp::new(bytes).at(2).iter().map(|rlp| rlp.as_val::<Header>()) {
+	for u in try!(UntrustedRlp::new(bytes).at(2)).iter().map(|rlp| rlp.as_val::<Header>()) {
+		let u = try!(u);
 		try!(verify_header(&u, engine));
 		try!(engine.verify_block_basic(&u, None));
 	}
@@ -58,8 +59,8 @@ pub fn verify_block_basic(header: &Header, bytes: &[u8], engine: &Engine) -> Res
 /// Returns a `PreverifiedBlock` structure populated with transactions
 pub fn verify_block_unordered(header: Header, bytes: Bytes, engine: &Engine) -> Result<PreverifiedBlock, Error> {
 	try!(engine.verify_block_unordered(&header, Some(&bytes)));
-	for u in Rlp::new(&bytes).at(2).iter().map(|rlp| rlp.as_val::<Header>()) {
-		try!(engine.verify_block_unordered(&u, None));
+	for u in try!(UntrustedRlp::new(&bytes).at(2)).iter().map(|rlp| rlp.as_val::<Header>()) {
+		try!(engine.verify_block_unordered(&try!(u), None));
 	}
 	// Verify transactions.
 	let mut transactions = Vec::new();
@@ -84,7 +85,7 @@ pub fn verify_block_family(header: &Header, bytes: &[u8], engine: &Engine, bc: &
 	try!(verify_parent(&header, &parent));
 	try!(engine.verify_block_family(&header, &parent, Some(bytes)));

-	let num_uncles = Rlp::new(bytes).at(2).item_count();
+	let num_uncles = try!(UntrustedRlp::new(bytes).at(2)).item_count();
 	if num_uncles != 0 {
 		if num_uncles > engine.maximum_uncle_count() {
 			return Err(From::from(BlockError::TooManyUncles(OutOfBounds { min: None, max: Some(engine.maximum_uncle_count()), found: num_uncles })));
@@ -106,7 +107,8 @@ pub fn verify_block_family(header: &Header, bytes: &[u8], engine: &Engine, bc: &
 			}
 		}

-		for uncle in Rlp::new(bytes).at(2).iter().map(|rlp| rlp.as_val::<Header>()) {
+		for uncle in try!(UntrustedRlp::new(bytes).at(2)).iter().map(|rlp| rlp.as_val::<Header>()) {
+			let uncle = try!(uncle);
 			if excluded.contains(&uncle.hash()) {
 				return Err(From::from(BlockError::UncleInChain(uncle.hash())))
 			}
@@ -210,13 +212,13 @@ fn verify_parent(header: &Header, parent: &Header) -> Result<(), Error> {

 /// Verify block data against header: transactions root and uncles hash.
 fn verify_block_integrity(block: &[u8], transactions_root: &H256, uncles_hash: &H256) -> Result<(), Error> {
-	let block = Rlp::new(block);
-	let tx = block.at(1);
+	let block = UntrustedRlp::new(block);
+	let tx = try!(block.at(1));
 	let expected_root = &ordered_trie_root(tx.iter().map(|r| r.as_raw().to_vec()).collect()); //TODO: get rid of vectors here
 	if expected_root != transactions_root {
 		return Err(From::from(BlockError::InvalidTransactionsRoot(Mismatch { expected: expected_root.clone(), found: transactions_root.clone() })))
 	}
-	let expected_uncles = &block.at(2).as_raw().sha3();
+	let expected_uncles = &try!(block.at(2)).as_raw().sha3();
 	if expected_uncles != uncles_hash {
 		return Err(From::from(BlockError::InvalidUnclesHash(Mismatch { expected: expected_uncles.clone(), found: uncles_hash.clone() })))
 	}
@@ -342,7 +344,7 @@ mod tests {
 		// Test against morden
 		let mut good = Header::new();
 		let spec = Spec::new_test();
-		let engine = &spec.engine;
+		let engine = &*spec.engine;

 		let min_gas_limit = engine.params().min_gas_limit;
 		good.gas_limit = min_gas_limit;
@@ -423,69 +425,69 @@ mod tests {
 		bc.insert(create_test_block(&parent7));
 		bc.insert(create_test_block(&parent8));

-		check_ok(basic_test(&create_test_block(&good), engine.deref()));
+		check_ok(basic_test(&create_test_block(&good), engine));

 		let mut header = good.clone();
 		header.transactions_root = good_transactions_root.clone();
 		header.uncles_hash = good_uncles_hash.clone();
-		check_ok(basic_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine.deref()));
+		check_ok(basic_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine));

 		header.gas_limit = min_gas_limit - From::from(1);
-		check_fail(basic_test(&create_test_block(&header), engine.deref()),
+		check_fail(basic_test(&create_test_block(&header), engine),
 			InvalidGasLimit(OutOfBounds { min: Some(min_gas_limit), max: None, found: header.gas_limit }));

 		header = good.clone();
 		header.number = BlockNumber::max_value();
-		check_fail(basic_test(&create_test_block(&header), engine.deref()),
+		check_fail(basic_test(&create_test_block(&header), engine),
 			RidiculousNumber(OutOfBounds { max: Some(BlockNumber::max_value()), min: None, found: header.number }));

 		header = good.clone();
 		header.gas_used = header.gas_limit + From::from(1);
-		check_fail(basic_test(&create_test_block(&header), engine.deref()),
+		check_fail(basic_test(&create_test_block(&header), engine),
 			TooMuchGasUsed(OutOfBounds { max: Some(header.gas_limit), min: None, found: header.gas_used }));

 		header = good.clone();
 		header.extra_data.resize(engine.maximum_extra_data_size() + 1, 0u8);
-		check_fail(basic_test(&create_test_block(&header), engine.deref()),
+		check_fail(basic_test(&create_test_block(&header), engine),
 			ExtraDataOutOfBounds(OutOfBounds { max: Some(engine.maximum_extra_data_size()), min: None, found: header.extra_data.len() }));

 		header = good.clone();
 		header.extra_data.resize(engine.maximum_extra_data_size() + 1, 0u8);
-		check_fail(basic_test(&create_test_block(&header), engine.deref()),
+		check_fail(basic_test(&create_test_block(&header), engine),
 			ExtraDataOutOfBounds(OutOfBounds { max: Some(engine.maximum_extra_data_size()), min: None, found: header.extra_data.len() }));

 		header = good.clone();
 		header.uncles_hash = good_uncles_hash.clone();
-		check_fail(basic_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine.deref()),
+		check_fail(basic_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine),
 			InvalidTransactionsRoot(Mismatch { expected: good_transactions_root.clone(), found: header.transactions_root }));

 		header = good.clone();
 		header.transactions_root = good_transactions_root.clone();
-		check_fail(basic_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine.deref()),
+		check_fail(basic_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine),
 			InvalidUnclesHash(Mismatch { expected: good_uncles_hash.clone(), found: header.uncles_hash }));

-		check_ok(family_test(&create_test_block(&good), engine.deref(), &bc));
-		check_ok(family_test(&create_test_block_with_data(&good, &good_transactions, &good_uncles), engine.deref(), &bc));
+		check_ok(family_test(&create_test_block(&good), engine, &bc));
+		check_ok(family_test(&create_test_block_with_data(&good, &good_transactions, &good_uncles), engine, &bc));

 		header = good.clone();
 		header.parent_hash = H256::random();
-		check_fail(family_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine.deref(), &bc),
+		check_fail(family_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine, &bc),
 			UnknownParent(header.parent_hash));

 		header = good.clone();
 		header.timestamp = 10;
-		check_fail(family_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine.deref(), &bc),
+		check_fail(family_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine, &bc),
 			InvalidTimestamp(OutOfBounds { max: None, min: Some(parent.timestamp + 1), found: header.timestamp }));

 		header = good.clone();
 		header.number = 9;
-		check_fail(family_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine.deref(), &bc),
+		check_fail(family_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine, &bc),
 			InvalidNumber(Mismatch { expected: parent.number + 1, found: header.number }));

 		header = good.clone();
 		let mut bad_uncles = good_uncles.clone();
 		bad_uncles.push(good_uncle1.clone());
-		check_fail(family_test(&create_test_block_with_data(&header, &good_transactions, &bad_uncles), engine.deref(), &bc),
+		check_fail(family_test(&create_test_block_with_data(&header, &good_transactions, &bad_uncles), engine, &bc),
 			TooManyUncles(OutOfBounds { max: Some(engine.maximum_uncle_count()), min: None, found: bad_uncles.len() }));

 		// TODO: some additional uncle checks
--- a/ethkey/src/primitive.rs
+++ b/ethkey/src/primitive.rs
@@ -24,7 +24,6 @@ macro_rules! impl_primitive {
 	($name: ident, $size: expr, $err: expr) => {

 		#[repr(C)]
-		#[derive(Eq)]
 		pub struct $name([u8; $size]);

 		impl fmt::Debug for $name {
@@ -62,6 +61,8 @@ macro_rules! impl_primitive {
 			}
 		}

+		impl Eq for $name { }
+
 		impl PartialOrd for $name {
 			fn partial_cmp(&self, other: &Self) -> Option<cmp::Ordering> {
 				let self_ref: &[u8] = &self.0;
--- a/ethkey/src/signature.rs
+++ b/ethkey/src/signature.rs
@@ -23,7 +23,6 @@ use rustc_serialize::hex::{ToHex, FromHex};
 use {Secret, Public, SECP256K1, Error, Message, public_to_address, Address};

 #[repr(C)]
-#[derive(Eq)]
 pub struct Signature([u8; 65]);

 impl Signature {
@@ -51,6 +50,9 @@ impl ::std::cmp::PartialEq for Signature {
 	}
 }

+// manual implementation required in Rust 1.13+, see `std::cmp::AssertParamIsEq`.
+impl Eq for Signature { }
+
 // also manual for the same reason, but the pretty printing might be useful.
 impl fmt::Debug for Signature {
 	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
@@ -136,7 +138,7 @@ pub fn verify_public(public: &Public, signature: &Signature, message: &Message)

 	let pdata: [u8; 65] = {
 		let mut temp = [4u8; 65];
-		temp[1..65].copy_from_slice(public.deref());
+		temp[1..65].copy_from_slice(&**public);
 		temp
 	};

--- a/ethstore/src/account/safe_account.rs
+++ b/ethstore/src/account/safe_account.rs
@@ -14,7 +14,6 @@
 // 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::ops::{Deref, DerefMut};
 use ethkey::{KeyPair, sign, Address, Secret, Signature, Message};
 use {json, Error, crypto};
 use crypto::Keccak256;
@@ -87,7 +86,7 @@ impl Crypto {
 		let mut ciphertext = [0u8; 32];

 		// aes-128-ctr with initial vector of iv
-		crypto::aes::encrypt(&derived_left_bits, &iv, secret.deref(), &mut ciphertext);
+		crypto::aes::encrypt(&derived_left_bits, &iv, &**secret, &mut ciphertext);

 		// KECCAK(DK[16..31] ++ <ciphertext>), where DK[16..31] - derived_right_bits
 		let mac = crypto::derive_mac(&derived_right_bits, &ciphertext).keccak256();
@@ -123,7 +122,7 @@ impl Crypto {

 		match self.cipher {
 			Cipher::Aes128Ctr(ref params) => {
-				crypto::aes::decrypt(&derived_left_bits, &params.iv, &self.ciphertext, secret.deref_mut())
+				crypto::aes::decrypt(&derived_left_bits, &params.iv, &self.ciphertext, &mut *secret)
 			},
 		}

--- a/ethstore/src/bin/ethstore.rs
+++ b/ethstore/src/bin/ethstore.rs
@@ -143,7 +143,7 @@ fn execute<S, I>(command: I) -> Result<String, Error> where I: IntoIterator<Item
 	} else if args.cmd_import {
 		let src = try!(key_dir(&args.flag_src));
 		let dst = try!(key_dir(&args.flag_dir));
-		let accounts = try!(import_accounts(src.deref(), dst.deref()));
+		let accounts = try!(import_accounts(*src, *dst));
 		Ok(format_accounts(&accounts))
 	} else if args.cmd_import_wallet {
 		let wallet = try!(PresaleWallet::open(&args.arg_path));
--- a/ethstore/src/dir/disk.rs
+++ b/ethstore/src/dir/disk.rs
@@ -22,6 +22,8 @@ use ethkey::Address;
 use {json, SafeAccount, Error};
 use super::KeyDirectory;

+const IGNORED_FILES: &'static [&'static str] = &["thumbs.db"];
+
 #[cfg(not(windows))]
 fn restrict_permissions_to_owner(file_path: &Path) -> Result<(), i32>  {
 	use std::ffi;
@@ -62,7 +64,14 @@ impl DiskDirectory {
 			.flat_map(Result::ok)
 			.filter(|entry| {
 				let metadata = entry.metadata();
-				metadata.is_ok() && !metadata.unwrap().is_dir()
+				let file_name = entry.file_name();
+				let name = file_name.to_str().unwrap();
+				// filter directories
+				metadata.is_ok() && !metadata.unwrap().is_dir() &&
+				// hidden files
+				!name.starts_with(".") &&
+				// other ignored files
+				!IGNORED_FILES.contains(&name)
 			})
 			.map(|entry| entry.path())
 			.collect::<Vec<PathBuf>>();
--- a/ipc/nano/src/lib.rs
+++ b/ipc/nano/src/lib.rs
@@ -27,8 +27,8 @@ use std::sync::*;
 use nanomsg::{Socket, Protocol, Error, Endpoint, PollRequest, PollFd, PollInOut};
 use std::ops::Deref;

-const POLL_TIMEOUT: isize = 100;
-const CLIENT_CONNECTION_TIMEOUT: isize = 2500;
+const POLL_TIMEOUT: isize = 200;
+const CLIENT_CONNECTION_TIMEOUT: isize = 15000;

 /// Generic worker to handle service (binded) sockets
 pub struct Worker<S: ?Sized> where S: IpcInterface {
@@ -68,7 +68,6 @@ pub fn init_duplex_client<S>(socket_addr: &str) -> Result<GuardedSocket<S>, Sock
 		SocketError::DuplexLink
 	}));

-	// 2500 ms default timeout
 	socket.set_receive_timeout(CLIENT_CONNECTION_TIMEOUT).unwrap();

 	let endpoint = try!(socket.connect(socket_addr).map_err(|e| {
@@ -91,7 +90,6 @@ pub fn init_client<S>(socket_addr: &str) -> Result<GuardedSocket<S>, SocketError
 		SocketError::RequestLink
 	}));

-	// 2500 ms default timeout
 	socket.set_receive_timeout(CLIENT_CONNECTION_TIMEOUT).unwrap();

 	let endpoint = try!(socket.connect(socket_addr).map_err(|e| {
--- a/json/src/hash.rs
+++ b/json/src/hash.rs
@@ -48,10 +48,10 @@ macro_rules! impl_hash {
 							0 => $inner::from(0),
 							2 if value == "0x" => $inner::from(0),
 							_ if value.starts_with("0x") => try!($inner::from_str(&value[2..]).map_err(|_| {
-								Error::custom(format!("Invalid hex value {}.", value).as_ref())
+								Error::custom(format!("Invalid hex value {}.", value).as_str())
 							})),
 							_ => try!($inner::from_str(value).map_err(|_| {
-								Error::custom(format!("Invalid hex value {}.", value).as_ref())
+								Error::custom(format!("Invalid hex value {}.", value).as_str())
 							}))
 						};

--- a/json/src/uint.rs
+++ b/json/src/uint.rs
@@ -70,10 +70,10 @@ impl Visitor for UintVisitor {
 			0 => U256::from(0),
 			2 if value.starts_with("0x") => U256::from(0),
 			_ if value.starts_with("0x") => try!(U256::from_str(&value[2..]).map_err(|_| {
-				Error::custom(format!("Invalid hex value {}.", value).as_ref())
+				Error::custom(format!("Invalid hex value {}.", value).as_str())
 			})),
 			_ => try!(U256::from_dec_str(value).map_err(|_| {
-				Error::custom(format!("Invalid decimal value {}.", value).as_ref())
+				Error::custom(format!("Invalid decimal value {}.", value).as_str())
 			}))
 		};

--- a/logger/src/lib.rs
+++ b/logger/src/lib.rs
@@ -89,10 +89,10 @@ pub fn setup_log(config: &Config) -> Result<Arc<RotatingLogger>, String> {
 		let timestamp = time::strftime("%Y-%m-%d %H:%M:%S %Z", &time::now()).unwrap();

 		let with_color = if max_log_level() <= LogLevelFilter::Info {
-			format!("{}{}", Colour::Black.bold().paint(timestamp), record.args())
+			format!("{} {}", Colour::Black.bold().paint(timestamp), record.args())
 		} else {
 			let name = thread::current().name().map_or_else(Default::default, |x| format!("{}", Colour::Blue.bold().paint(x)));
-			format!("{}{} {} {}  {}", Colour::Black.bold().paint(timestamp), name, record.level(), record.target(), record.args())
+			format!("{} {} {} {}  {}", Colour::Black.bold().paint(timestamp), name, record.level(), record.target(), record.args())
 		};

 		let removed_color = kill_color(with_color.as_ref());
--- a/nsis/installer.nsi
+++ b/nsis/installer.nsi
@@ -4,7 +4,7 @@
 !define DESCRIPTION "Fast, light, robust Ethereum implementation"
 !define VERSIONMAJOR 1
 !define VERSIONMINOR 3
-!define VERSIONBUILD 0
+!define VERSIONBUILD 3

 !addplugindir .\

--- a/parity/cli.rs
+++ b/parity/cli.rs
@@ -132,6 +132,11 @@ API and Console Options:
  --dapps-interface IP     Specify the hostname portion of the Dapps
                           server, IP should be an interface's IP address,
                           or local [default: local].
+  --dapps-hosts HOSTS      List of allowed Host header values. This option will
+                           validate the Host header sent by the browser, it
+                           is additional security against some attack
+                           vectors. Special options: "all", "none",
+                           [default: none].
  --dapps-user USERNAME    Specify username for Dapps server. It will be
                           used in HTTP Basic Authentication Scheme.
                           If --dapps-pass is not specified you will be
@@ -231,6 +236,12 @@ Import/Export Options:
  --format FORMAT          For import/export in given format. FORMAT must be
                           one of 'hex' and 'binary'.

+Snapshot Options:
+  --at BLOCK               Take a snapshot at the given block, which may be an
+                           index, hash, or 'latest'. Note that taking snapshots at
+                           non-recent blocks will only work with --pruning archive
+                           [default: latest]
+
 Virtual Machine Options:
  --jitvm                  Enable the JIT VM.

@@ -337,6 +348,7 @@ pub struct Args {
 	pub flag_no_dapps: bool,
 	pub flag_dapps_port: u16,
 	pub flag_dapps_interface: String,
+	pub flag_dapps_hosts: String,
 	pub flag_dapps_user: Option<String>,
 	pub flag_dapps_pass: Option<String>,
 	pub flag_dapps_path: String,
@@ -365,6 +377,7 @@ pub struct Args {
 	pub flag_version: bool,
 	pub flag_from: String,
 	pub flag_to: String,
+  pub flag_at: String,
 	pub flag_format: Option<String>,
 	pub flag_jitvm: bool,
 	pub flag_log_file: Option<String>,
--- a/parity/configuration.rs
+++ b/parity/configuration.rs
@@ -171,6 +171,7 @@ impl Configuration {
 				file_path: self.args.arg_file.clone(),
 				wal: wal,
 				kind: snapshot::Kind::Take,
+				block_at: try!(to_block_id(&self.args.flag_at)),
 			};
 			Cmd::Snapshot(snapshot_cmd)
 		} else if self.args.cmd_restore {
@@ -186,6 +187,7 @@ impl Configuration {
 				file_path: self.args.arg_file.clone(),
 				wal: wal,
 				kind: snapshot::Kind::Restore,
+				block_at: try!(to_block_id("latest")), // unimportant.
 			};
 			Cmd::Snapshot(restore_cmd)
 		} else {
@@ -353,6 +355,7 @@ impl Configuration {
 			enabled: self.dapps_enabled(),
 			interface: self.dapps_interface(),
 			port: self.args.flag_dapps_port,
+			hosts: self.dapps_hosts(),
 			user: self.args.flag_dapps_user.clone(),
 			pass: self.args.flag_dapps_pass.clone(),
 			dapps_path: self.directories().dapps,
@@ -472,6 +475,16 @@ impl Configuration {
 		Some(hosts)
 	}

+	fn dapps_hosts(&self) -> Option<Vec<String>> {
+		match self.args.flag_dapps_hosts.as_ref() {
+			"none" => return Some(Vec::new()),
+			"all" => return None,
+			_ => {}
+		}
+		let hosts = self.args.flag_dapps_hosts.split(',').map(|h| h.into()).collect();
+		Some(hosts)
+	}
+
 	fn ipc_config(&self) -> Result<IpcConfiguration, String> {
 		let conf = IpcConfiguration {
 			enabled: !(self.args.flag_ipcdisable || self.args.flag_ipc_off || self.args.flag_no_ipc),
@@ -499,8 +512,6 @@ impl Configuration {
 		NetworkSettings {
 			name: self.args.flag_identity.clone(),
 			chain: self.chain(),
-			max_peers: self.max_peers(),
-			min_peers: self.min_peers(),
 			network_port: self.args.flag_port,
 			rpc_enabled: !self.args.flag_jsonrpc_off && !self.args.flag_no_jsonrpc,
 			rpc_interface: self.args.flag_rpcaddr.clone().unwrap_or(self.args.flag_jsonrpc_interface.clone()),
@@ -509,6 +520,8 @@ impl Configuration {
 	}

 	fn directories(&self) -> Directories {
+		use util::path;
+
 		let db_path = replace_home(self.args.flag_datadir.as_ref().unwrap_or(&self.args.flag_db_path));

 		let keys_path = replace_home(
@@ -522,6 +535,12 @@ impl Configuration {
 		let dapps_path = replace_home(&self.args.flag_dapps_path);
 		let signer_path = replace_home(&self.args.flag_signer_path);

+		if self.args.flag_geth {
+			let geth_path = path::ethereum::default();
+			::std::fs::create_dir_all(geth_path.as_path()).unwrap_or_else(
+				|e| warn!("Failed to create '{}' for geth mode: {}", &geth_path.to_str().unwrap(), e));
+		}
+
 		Directories {
 			keys: keys_path,
 			db: db_path,
@@ -769,8 +788,6 @@ mod tests {
 		assert_eq!(conf.network_settings(), NetworkSettings {
 			name: "testname".to_owned(),
 			chain: "morden".to_owned(),
-			max_peers: 50,
-			min_peers: 25,
 			network_port: 30303,
 			rpc_enabled: true,
 			rpc_interface: "local".to_owned(),
@@ -826,6 +843,23 @@ mod tests {
 		assert_eq!(conf3.rpc_hosts(), Some(vec!["ethcore.io".into(), "something.io".into()]));
 	}

+	#[test]
+	fn should_parse_dapps_hosts() {
+		// given
+
+		// when
+		let conf0 = parse(&["parity"]);
+		let conf1 = parse(&["parity", "--dapps-hosts", "none"]);
+		let conf2 = parse(&["parity", "--dapps-hosts", "all"]);
+		let conf3 = parse(&["parity", "--dapps-hosts", "ethcore.io,something.io"]);
+
+		// then
+		assert_eq!(conf0.dapps_hosts(), Some(Vec::new()));
+		assert_eq!(conf1.dapps_hosts(), Some(Vec::new()));
+		assert_eq!(conf2.dapps_hosts(), None);
+		assert_eq!(conf3.dapps_hosts(), Some(vec!["ethcore.io".into(), "something.io".into()]));
+	}
+
 	#[test]
 	fn should_disable_signer_in_geth_compat() {
 		// given
--- a/parity/dapps.rs
+++ b/parity/dapps.rs
@@ -15,21 +15,16 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 use std::sync::Arc;
-use std::net::SocketAddr;
 use io::PanicHandler;
 use rpc_apis;
 use helpers::replace_home;

-#[cfg(feature = "dapps")]
-pub use ethcore_dapps::Server as WebappServer;
-#[cfg(not(feature = "dapps"))]
-pub struct WebappServer;
-
 #[derive(Debug, PartialEq, Clone)]
 pub struct Configuration {
 	pub enabled: bool,
 	pub interface: String,
 	pub port: u16,
+	pub hosts: Option<Vec<String>>,
 	pub user: Option<String>,
 	pub pass: Option<String>,
 	pub dapps_path: String,
@@ -41,6 +36,7 @@ impl Default for Configuration {
 			enabled: true,
 			interface: "127.0.0.1".into(),
 			port: 8080,
+			hosts: Some(Vec::new()),
 			user: None,
 			pass: None,
 			dapps_path: replace_home("$HOME/.parity/dapps"),
@@ -72,48 +68,68 @@ pub fn new(configuration: Configuration, deps: Dependencies) -> Result<Option<We
 		(username.to_owned(), password)
 	});

-	Ok(Some(try!(setup_dapps_server(deps, configuration.dapps_path, &addr, auth))))
+	Ok(Some(try!(setup_dapps_server(deps, configuration.dapps_path, &addr, configuration.hosts, auth))))
 }

+pub use self::server::setup_dapps_server;
+pub use self::server::WebappServer;
+
 #[cfg(not(feature = "dapps"))]
-pub fn setup_dapps_server(
-	_deps: Dependencies,
-	_dapps_path: String,
-	_url: &SocketAddr,
-	_auth: Option<(String, String)>,
-) -> Result<WebappServer, String> {
-	Err("Your Parity version has been compiled without WebApps support.".into())
-}
+mod server {
+	use super::Dependencies;
+	use std::net::SocketAddr;

-#[cfg(feature = "dapps")]
-pub fn setup_dapps_server(
-	deps: Dependencies,
-	dapps_path: String,
-	url: &SocketAddr,
-	auth: Option<(String, String)>
-) -> Result<WebappServer, String> {
-	use ethcore_dapps as dapps;
-
-	let server = dapps::ServerBuilder::new(dapps_path);
-	let server = rpc_apis::setup_rpc(server, deps.apis.clone(), rpc_apis::ApiSet::UnsafeContext);
-	let start_result = match auth {
-		None => {
-			server.start_unsecure_http(url)
-		},
-		Some((username, password)) => {
-			server.start_basic_auth_http(url, &username, &password)
-		},
-	};
-
-	match start_result {
-		Err(dapps::ServerError::IoError(err)) => Err(format!("WebApps io error: {}", err)),
-		Err(e) => Err(format!("WebApps error: {:?}", e)),
-		Ok(server) => {
-			server.set_panic_handler(move || {
-				deps.panic_handler.notify_all("Panic in WebApp thread.".to_owned());
-			});
-			Ok(server)
-		},
+	pub struct WebappServer;
+	pub fn setup_dapps_server(
+		_deps: Dependencies,
+		_dapps_path: String,
+		_url: &SocketAddr,
+		_allowed_hosts: Option<Vec<String>>,
+		_auth: Option<(String, String)>,
+	) -> Result<WebappServer, String> {
+		Err("Your Parity version has been compiled without WebApps support.".into())
+	}
+}
+
+#[cfg(feature = "dapps")]
+mod server {
+	use super::Dependencies;
+	use std::net::SocketAddr;
+
+	use rpc_apis;
+
+	pub use ethcore_dapps::Server as WebappServer;
+
+	pub fn setup_dapps_server(
+		deps: Dependencies,
+		dapps_path: String,
+		url: &SocketAddr,
+		allowed_hosts: Option<Vec<String>>,
+		auth: Option<(String, String)>
+	) -> Result<WebappServer, String> {
+		use ethcore_dapps as dapps;
+
+		let server = dapps::ServerBuilder::new(dapps_path);
+		let server = rpc_apis::setup_rpc(server, deps.apis.clone(), rpc_apis::ApiSet::UnsafeContext);
+		let start_result = match auth {
+			None => {
+				server.start_unsecured_http(url, allowed_hosts)
+			},
+			Some((username, password)) => {
+				server.start_basic_auth_http(url, allowed_hosts, &username, &password)
+			},
+		};
+
+		match start_result {
+			Err(dapps::ServerError::IoError(err)) => Err(format!("WebApps io error: {}", err)),
+			Err(e) => Err(format!("WebApps error: {:?}", e)),
+			Ok(server) => {
+				server.set_panic_handler(move || {
+					deps.panic_handler.notify_all("Panic in WebApp thread.".to_owned());
+				});
+				Ok(server)
+			},
+		}
 	}
 }

--- a/parity/informant.rs
+++ b/parity/informant.rs
@@ -21,7 +21,6 @@ use self::ansi_term::Style;
 use std::sync::{Arc};
 use std::sync::atomic::{AtomicUsize, Ordering as AtomicOrdering};
 use std::time::{Instant, Duration};
-use std::ops::{Deref, DerefMut};
 use isatty::{stdout_isatty};
 use ethsync::{SyncProvider, ManageNetwork};
 use util::{Uint, RwLock, Mutex, H256, Colour};
@@ -112,7 +111,7 @@ impl Informant {
 					paint(White.bold(), format!("{:>8}", format!("#{}", chain_info.best_block_number))),
 					paint(White.bold(), format!("{}", chain_info.best_block_hash)),
 					{
-						let last_report = match write_report.deref() { &Some(ref last_report) => last_report.clone(), _ => ClientReport::default() };
+						let last_report = match *write_report { Some(ref last_report) => last_report.clone(), _ => ClientReport::default() };
 						format!("{} blk/s {} tx/s {} Mgas/s",
 							paint(Yellow.bold(), format!("{:4}", ((report.blocks_imported - last_report.blocks_imported) * 1000) as u64 / elapsed.as_milliseconds())),
 							paint(Yellow.bold(), format!("{:4}", ((report.transactions_applied - last_report.transactions_applied) * 1000) as u64 / elapsed.as_milliseconds())),
@@ -132,7 +131,7 @@ impl Informant {
 					},
 					paint(Cyan.bold(), format!("{:2}", sync_info.num_active_peers)),
 					paint(Cyan.bold(), format!("{:2}", sync_info.num_peers)),
-					paint(Cyan.bold(), format!("{:2}", if sync_info.num_peers as u32 > net_config.min_peers { net_config.max_peers} else { net_config.min_peers} ))
+					paint(Cyan.bold(), format!("{:2}", sync_info.current_max_peers(net_config.min_peers, net_config.max_peers))),
 				),
 				_ => String::new(),
 			},
@@ -147,9 +146,9 @@ impl Informant {
 			)
 		);

-		*self.chain_info.write().deref_mut() = Some(chain_info);
-		*self.cache_info.write().deref_mut() = Some(cache_info);
-		*write_report.deref_mut() = Some(report);
+		*self.chain_info.write() = Some(chain_info);
+		*self.cache_info.write() = Some(cache_info);
+		*write_report = Some(report);
 	}
 }

--- a/parity/migration.rs
+++ b/parity/migration.rs
@@ -29,7 +29,7 @@ use ethcore::migrations::Extract;
 /// Database is assumed to be at default version, when no version file is found.
 const DEFAULT_VERSION: u32 = 5;
 /// Current version of database models.
-const CURRENT_VERSION: u32 = 9;
+const CURRENT_VERSION: u32 = 10;
 /// First version of the consolidated database.
 const CONSOLIDATION_VERSION: u32 = 9;
 /// Defines how many items are migrated to the new version of database at once.
@@ -140,7 +140,12 @@ pub fn default_migration_settings(compaction_profile: &CompactionProfile) -> Mig

 /// Migrations on the consolidated database.
 fn consolidated_database_migrations(compaction_profile: &CompactionProfile) -> Result<MigrationManager, Error> {
-	let manager = MigrationManager::new(default_migration_settings(compaction_profile));
+	let mut manager = MigrationManager::new(default_migration_settings(compaction_profile));
+	// this won't ever fire, because version will be already 9
+	// added because migration api should know that it should open database with 5 columns
+	try!(manager.add_migration(migrations::ToV9::new(Some(5), migrations::Extract::All)).map_err(|_| Error::MigrationImpossible));
+	// this will
+	try!(manager.add_migration(migrations::ToV10).map_err(|_| Error::MigrationImpossible));
 	Ok(manager)
 }

@@ -180,7 +185,6 @@ fn consolidate_database(
 	Ok(())
 }

-
 /// Migrates database at given position with given migration rules.
 fn migrate_database(version: u32, db_path: PathBuf, mut migrations: MigrationManager) -> Result<(), Error> {
 	// check if migration is needed
@@ -215,6 +219,12 @@ fn exists(path: &Path) -> bool {
 	fs::metadata(path).is_ok()
 }

+// in-place upgrades that do nothing when called repeatedly
+fn run_inplace_upgrades(path: &Path) -> Result<(), Error> {
+	try!(migrations::upgrade_account_bloom(path));
+	Ok(())
+}
+
 /// Migrates the database.
 pub fn migrate(path: &Path, pruning: Algorithm, compaction_profile: CompactionProfile) -> Result<(), Error> {
 	// read version file.
@@ -228,6 +238,7 @@ pub fn migrate(path: &Path, pruning: Algorithm, compaction_profile: CompactionPr

 	// We are in the latest version, yay!
 	if version == CURRENT_VERSION {
+		try!(run_inplace_upgrades(consolidated_database_path(path).as_path()));
 		return Ok(())
 	}

@@ -259,6 +270,8 @@ pub fn migrate(path: &Path, pruning: Algorithm, compaction_profile: CompactionPr
 		println!("Migration finished");
 	}

+	try!(run_inplace_upgrades(consolidated_database_path(path).as_path()));
+
 	// update version file.
 	update_version(path)
 }
--- a/parity/params.rs
+++ b/parity/params.rs
@@ -15,11 +15,10 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 use std::str::FromStr;
-use std::sync::Arc;
+use std::fs;
 use std::time::Duration;
-use util::{contents, Database, DatabaseConfig, journaldb, H256, Address, U256, version_data};
+use util::{contents, H256, Address, U256, version_data};
 use util::journaldb::Algorithm;
-use ethcore::client;
 use ethcore::spec::Spec;
 use ethcore::ethereum;
 use ethcore::miner::{GasPricer, GasPriceCalibratorOptions};
@@ -100,20 +99,13 @@ impl Pruning {

 	fn find_best_db(dirs: &Directories, genesis_hash: H256, fork_name: Option<&String>) -> Algorithm {
 		let mut algo_types = Algorithm::all_types();
-
-		// if all dbs have the same latest era, the last element is the default one
+		// if all dbs have the same modification time, the last element is the default one
 		algo_types.push(Algorithm::default());

 		algo_types.into_iter().max_by_key(|i| {
-			let client_path = dirs.client_path(genesis_hash, fork_name, *i);
-			let config = DatabaseConfig::with_columns(client::DB_NO_OF_COLUMNS);
-			let db = match Database::open(&config, client_path.to_str().unwrap()) {
-				Ok(db) => db,
-				Err(_) => return 0,
-			};
-			let db = journaldb::new(Arc::new(db), *i, client::DB_COL_STATE);
-			trace!(target: "parity", "Looking for best DB: {} at {:?}", i, db.latest_era());
-			db.latest_era().unwrap_or(0)
+			let mut client_path = dirs.client_path(genesis_hash, fork_name, *i);
+			client_path.push("CURRENT");
+			fs::metadata(&client_path).and_then(|m| m.modified()).ok()
 		}).unwrap()
 	}
 }
--- a/parity/rpc_apis.rs
+++ b/parity/rpc_apis.rs
@@ -186,7 +186,7 @@ pub fn setup_rpc<T: Extendable>(server: T, deps: Arc<Dependencies>, apis: ApiSet
 			},
 			Api::Ethcore => {
 				let queue = deps.signer_port.map(|_| deps.signer_queue.clone());
-				server.add_delegate(EthcoreClient::new(&deps.client, &deps.miner, deps.logger.clone(), deps.settings.clone(), queue).to_delegate())
+				server.add_delegate(EthcoreClient::new(&deps.client, &deps.miner, &deps.sync, &deps.net_service, deps.logger.clone(), deps.settings.clone(), queue).to_delegate())
 			},
 			Api::EthcoreSet => {
 				server.add_delegate(EthcoreSetClient::new(&deps.client, &deps.miner, &deps.net_service).to_delegate())
--- a/parity/run.rs
+++ b/parity/run.rs
@@ -30,8 +30,6 @@ use ethcore::account_provider::AccountProvider;
 use ethcore::miner::{Miner, MinerService, ExternalMiner, MinerOptions};
 use ethsync::SyncConfig;
 use informant::Informant;
-#[cfg(feature="ipc")]
-use ethcore::client::ChainNotify;

 use rpc::{HttpServer, IpcServer, HttpConfiguration, IpcConfiguration};
 use signer::SignerServer;
@@ -82,9 +80,6 @@ pub struct RunCmd {
 }

 pub fn execute(cmd: RunCmd) -> Result<(), String> {
-	// create supervisor
-	let mut hypervisor = modules::hypervisor();
-
 	// increase max number of open files
 	raise_fd_limit();

@@ -167,6 +162,9 @@ pub fn execute(cmd: RunCmd) -> Result<(), String> {
 		net_conf.boot_nodes = spec.nodes.clone();
 	}

+	// create supervisor
+	let mut hypervisor = modules::hypervisor();
+
 	// create client service.
 	let service = try!(ClientService::start(
 		client_config,
--- a/parity/signer.rs
+++ b/parity/signer.rs
@@ -68,7 +68,7 @@ fn codes_path(path: String) -> PathBuf {

 pub fn new_token(path: String) -> Result<String, String> {
 	generate_new_token(path)
-		.map(|code| format!("This key code will authorise your System Signer UI: {}", Colour::White.bold().paint(code)))
+		.map(|code| format!("This key code will authorise your System Signer UI: {}", code))
 		.map_err(|err| format!("Error generating token: {:?}", err))
 }

--- a/parity/snapshot.rs
+++ b/parity/snapshot.rs
@@ -19,12 +19,15 @@
 use std::time::Duration;
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
+
 use ethcore_logger::{setup_log, Config as LogConfig};
-use ethcore::snapshot::{RestorationStatus, SnapshotService};
+use ethcore::snapshot::{Progress, RestorationStatus, SnapshotService};
 use ethcore::snapshot::io::{SnapshotReader, PackedReader, PackedWriter};
 use ethcore::service::ClientService;
 use ethcore::client::{Mode, DatabaseCompactionProfile, Switch, VMType};
 use ethcore::miner::Miner;
+use ethcore::ids::BlockID;
+
 use cache::CacheConfig;
 use params::{SpecType, Pruning};
 use helpers::{to_client_config, execute_upgrades};
@@ -56,6 +59,7 @@ pub struct SnapshotCommand {
 	pub file_path: Option<String>,
 	pub wal: bool,
 	pub kind: Kind,
+	pub block_at: BlockID,
 }

 impl SnapshotCommand {
@@ -105,7 +109,7 @@ impl SnapshotCommand {
 		warn!("Snapshot restoration is experimental and the format may be subject to change.");

 		let snapshot = service.snapshot_service();
-		let reader = PackedReader::new(&Path::new(&file))
+		let reader = PackedReader::new(Path::new(&file))
 			.map_err(|e| format!("Couldn't open snapshot file: {}", e))
 			.and_then(|x| x.ok_or("Snapshot file has invalid format.".into()));

@@ -168,6 +172,7 @@ impl SnapshotCommand {
 	pub fn take_snapshot(self) -> Result<(), String> {
 		let file_path = try!(self.file_path.clone().ok_or("No file path provided.".to_owned()));
 		let file_path: PathBuf = file_path.into();
+		let block_at = self.block_at;
 		let (service, _panic_handler) = try!(self.start_service());

 		warn!("Snapshots are currently experimental. File formats may be subject to change.");
@@ -175,11 +180,35 @@ impl SnapshotCommand {
 		let writer = try!(PackedWriter::new(&file_path)
 			.map_err(|e| format!("Failed to open snapshot writer: {}", e)));

-		if let Err(e) = service.client().take_snapshot(writer) {
+		let progress = Arc::new(Progress::default());
+		let p = progress.clone();
+		let informant_handle = ::std::thread::spawn(move || {
+			::std::thread::sleep(Duration::from_secs(5));
+
+			let mut last_size = 0;
+			while !p.done() {
+				let cur_size = p.size();
+				if cur_size != last_size {
+					last_size = cur_size;
+					info!("Snapshot: {} accounts {} blocks {} bytes", p.accounts(), p.blocks(), p.size());
+				} else {
+					info!("Snapshot: No progress since last update.");
+				}
+
+				::std::thread::sleep(Duration::from_secs(5));
+			}
+ 		});
+
+		if let Err(e) = service.client().take_snapshot(writer, block_at, &*progress) {
 			let _ = ::std::fs::remove_file(&file_path);
 			return Err(format!("Encountered fatal error while creating snapshot: {}", e));
 		}

+		info!("snapshot creation complete");
+
+		assert!(progress.done());
+		try!(informant_handle.join().map_err(|_| "failed to join logger thread"));
+
 		Ok(())
 	}
 }
@@ -192,4 +221,4 @@ pub fn execute(cmd: SnapshotCommand) -> Result<String, String> {
 	}

 	Ok(String::new())
-}
+}
--- a/rpc/Cargo.toml
+++ b/rpc/Cargo.toml
@@ -12,7 +12,7 @@ build = "build.rs"
 log = "0.3"
 serde = "0.7.0"
 serde_json = "0.7.0"
-jsonrpc-core = "2.0"
+jsonrpc-core = "2.1"
 jsonrpc-http-server = { git = "https://github.com/ethcore/jsonrpc-http-server.git" }
 ethcore-io = { path = "../util/io" }
 ethcore-util = { path = "../util" }
--- a/rpc/src/v1/helpers/dispatch.rs
+++ b/rpc/src/v1/helpers/dispatch.rs
@@ -0,0 +1,96 @@
+// 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::*;
+use util::rlp::encode;
+use util::bytes::ToPretty;
+use ethcore::miner::MinerService;
+use ethcore::client::MiningBlockChainClient;
+use ethcore::transaction::{Action, SignedTransaction, Transaction};
+use ethcore::account_provider::AccountProvider;
+use jsonrpc_core::{Error, Value, to_value};
+use v1::helpers::TransactionRequest;
+use v1::types::{H256 as RpcH256, H520 as RpcH520};
+use v1::helpers::errors;
+
+fn prepare_transaction<C, M>(client: &C, miner: &M, request: TransactionRequest) -> Transaction where C: MiningBlockChainClient, M: MinerService {
+	Transaction {
+		nonce: request.nonce
+			.or_else(|| miner
+					 .last_nonce(&request.from)
+					 .map(|nonce| nonce + U256::one()))
+			.unwrap_or_else(|| client.latest_nonce(&request.from)),
+
+		action: request.to.map_or(Action::Create, Action::Call),
+		gas: request.gas.unwrap_or_else(|| miner.sensible_gas_limit()),
+		gas_price: request.gas_price.unwrap_or_else(|| default_gas_price(client, miner)),
+		value: request.value.unwrap_or_else(U256::zero),
+		data: request.data.map_or_else(Vec::new, |b| b.to_vec()),
+	}
+}
+
+pub fn dispatch_transaction<C, M>(client: &C, miner: &M, signed_transaction: SignedTransaction) -> Result<Value, Error>
+	where C: MiningBlockChainClient, M: MinerService {
+	let hash = RpcH256::from(signed_transaction.hash());
+
+	let import = miner.import_own_transaction(client, signed_transaction);
+
+	import
+		.map_err(errors::from_transaction_error)
+		.and_then(|_| to_value(&hash))
+}
+
+pub fn signature_with_password(accounts: &AccountProvider, address: Address, hash: H256, pass: String) -> Result<Value, Error> {
+	accounts.sign_with_password(address, pass, hash)
+		.map_err(errors::from_password_error)
+		.and_then(|hash| to_value(&RpcH520::from(hash)))
+}
+
+pub fn unlock_sign_and_dispatch<C, M>(client: &C, miner: &M, request: TransactionRequest, account_provider: &AccountProvider, password: String) -> Result<Value, Error>
+	where C: MiningBlockChainClient, M: MinerService {
+
+	let address = request.from;
+	let signed_transaction = {
+		let t = prepare_transaction(client, miner, request);
+		let hash = t.hash();
+		let signature = try!(account_provider.sign_with_password(address, password, hash).map_err(errors::from_password_error));
+		t.with_signature(signature)
+	};
+
+	trace!(target: "miner", "send_transaction: dispatching tx: {}", encode(&signed_transaction).to_vec().pretty());
+	dispatch_transaction(&*client, &*miner, signed_transaction)
+}
+
+pub fn sign_and_dispatch<C, M>(client: &C, miner: &M, request: TransactionRequest, account_provider: &AccountProvider, address: Address) -> Result<Value, Error>
+	where C: MiningBlockChainClient, M: MinerService {
+
+	let signed_transaction = {
+		let t = prepare_transaction(client, miner, request);
+		let hash = t.hash();
+		let signature = try!(account_provider.sign(address, hash).map_err(errors::from_signing_error));
+		t.with_signature(signature)
+	};
+
+	trace!(target: "miner", "send_transaction: dispatching tx: {}", encode(&signed_transaction).to_vec().pretty());
+	dispatch_transaction(&*client, &*miner, signed_transaction)
+}
+
+pub fn default_gas_price<C, M>(client: &C, miner: &M) -> U256 where C: MiningBlockChainClient, M: MinerService {
+	client
+		.gas_price_statistics(100, 8)
+		.map(|x| x[4])
+		.unwrap_or_else(|_| miner.sensible_gas_price())
+}
--- a/rpc/src/v1/helpers/errors.rs
+++ b/rpc/src/v1/helpers/errors.rs
@@ -0,0 +1,188 @@
+// 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/>.
+
+//! RPC Error codes and error objects
+
+macro_rules! rpc_unimplemented {
+	() => (Err(::v1::helpers::errors::unimplemented()))
+}
+
+use std::fmt;
+use ethcore::error::Error as EthcoreError;
+use ethcore::account_provider::{Error as AccountError};
+use jsonrpc_core::{Error, ErrorCode, Value};
+
+mod codes {
+	// NOTE [ToDr] Codes from [-32099, -32000]
+	pub const UNSUPPORTED_REQUEST: i64 = -32000;
+	pub const NO_WORK: i64 = -32001;
+	pub const NO_AUTHOR: i64 = -32002;
+	pub const UNKNOWN_ERROR: i64 = -32009;
+	pub const TRANSACTION_ERROR: i64 = -32010;
+	pub const ACCOUNT_LOCKED: i64 = -32020;
+	pub const PASSWORD_INVALID: i64 = -32021;
+	pub const ACCOUNT_ERROR: i64 = -32023;
+	pub const SIGNER_DISABLED: i64 = -32030;
+	pub const REQUEST_REJECTED: i64 = -32040;
+	pub const REQUEST_NOT_FOUND: i64 = -32041;
+	pub const COMPILATION_ERROR: i64 = -32050;
+}
+
+pub fn unimplemented() -> Error {
+	Error {
+		code: ErrorCode::ServerError(codes::UNSUPPORTED_REQUEST),
+		message: "This request is not implemented yet. Please create an issue on Github repo.".into(),
+		data: None
+	}
+}
+
+pub fn request_not_found() -> Error {
+	Error {
+		code: ErrorCode::ServerError(codes::REQUEST_NOT_FOUND),
+		message: "Request not found.".into(),
+		data: None,
+	}
+}
+
+pub fn request_rejected() -> Error {
+	Error {
+		code: ErrorCode::ServerError(codes::REQUEST_REJECTED),
+		message: "Request has been rejected.".into(),
+		data: None,
+	}
+}
+
+
+pub fn account<T: fmt::Debug>(error: &str, details: T) -> Error {
+	Error {
+		code: ErrorCode::ServerError(codes::ACCOUNT_ERROR),
+		message: error.into(),
+		data: Some(Value::String(format!("{:?}", details))),
+	}
+}
+
+pub fn compilation<T: fmt::Debug>(error: T) -> Error {
+	Error {
+		code: ErrorCode::ServerError(codes::COMPILATION_ERROR),
+		message: "Error while compiling code.".into(),
+		data: Some(Value::String(format!("{:?}", error))),
+	}
+}
+
+pub fn internal<T: fmt::Debug>(error: &str, data: T) -> Error {
+	Error {
+		code: ErrorCode::InternalError,
+		message: format!("Internal error occurred: {}", error),
+		data: Some(Value::String(format!("{:?}", data))),
+	}
+}
+
+pub fn invalid_params<T: fmt::Debug>(param: &str, details: T) -> Error {
+	Error {
+		code: ErrorCode::InvalidParams,
+		message: format!("Couldn't parse parameters: {}", param),
+		data: Some(Value::String(format!("{:?}", details))),
+	}
+}
+
+pub fn state_pruned() -> Error {
+	Error {
+		code: ErrorCode::ServerError(codes::UNSUPPORTED_REQUEST),
+		message: "This request is not supported because your node is running with state pruning. Run with --pruning=archive.".into(),
+		data: None
+	}
+}
+
+pub fn no_work() -> Error {
+	Error {
+		code: ErrorCode::ServerError(codes::NO_WORK),
+		message: "Still syncing.".into(),
+		data: None
+	}
+}
+
+pub fn no_author() -> Error {
+	Error {
+		code: ErrorCode::ServerError(codes::NO_AUTHOR),
+		message: "Author not configured. Run Parity with --author to configure.".into(),
+		data: None
+	}
+}
+
+
+pub fn signer_disabled() -> Error {
+	Error {
+		code: ErrorCode::ServerError(codes::SIGNER_DISABLED),
+		message: "Trusted Signer is disabled. This API is not available.".into(),
+		data: None
+	}
+}
+
+pub fn from_signing_error(error: AccountError) -> Error {
+	Error {
+		code: ErrorCode::ServerError(codes::ACCOUNT_LOCKED),
+		message: "Your account is locked. Unlock the account via CLI, personal_unlockAccount or use Trusted Signer.".into(),
+		data: Some(Value::String(format!("{:?}", error))),
+	}
+}
+
+pub fn from_password_error(error: AccountError) -> Error {
+	Error {
+		code: ErrorCode::ServerError(codes::PASSWORD_INVALID),
+		message: "Account password is invalid or account does not exist.".into(),
+		data: Some(Value::String(format!("{:?}", error))),
+	}
+}
+
+pub fn from_transaction_error(error: EthcoreError) -> Error {
+	use ethcore::error::TransactionError::*;
+
+	if let EthcoreError::Transaction(e) = error {
+		let msg = match e {
+			AlreadyImported => "Transaction with the same hash was already imported.".into(),
+			Old => "Transaction nonce is too low. Try incrementing the nonce.".into(),
+			TooCheapToReplace => {
+				"Transaction fee is too low. There is another transaction with same nonce in the queue. Try increasing the fee or incrementing the nonce.".into()
+			},
+			LimitReached => {
+				"There are too many transactions in the queue. Your transaction was dropped due to limit. Try increasing the fee.".into()
+			},
+			InsufficientGasPrice { minimal, got } => {
+				format!("Transaction fee is too low. It does not satisfy your node's minimal fee (minimal: {}, got: {}). Try increasing the fee.", minimal, got)
+			},
+			InsufficientBalance { balance, cost } => {
+				format!("Insufficient funds. Account you try to send transaction from does not have enough funds. Required {} and got: {}.", cost, balance)
+			},
+			GasLimitExceeded { limit, got } => {
+				format!("Transaction cost exceeds current gas limit. Limit: {}, got: {}. Try decreasing supplied gas.", limit, got)
+			},
+			InvalidGasLimit(_) => "Supplied gas is beyond limit.".into(),
+		};
+		Error {
+			code: ErrorCode::ServerError(codes::TRANSACTION_ERROR),
+			message: msg,
+			data: None,
+		}
+	} else {
+		Error {
+			code: ErrorCode::ServerError(codes::UNKNOWN_ERROR),
+			message: "Unknown error when sending transaction.".into(),
+			data: Some(Value::String(format!("{:?}", error))),
+		}
+	}
+}
+
+
--- a/rpc/src/v1/helpers/mod.rs
+++ b/rpc/src/v1/helpers/mod.rs
@@ -14,6 +14,10 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

+#[macro_use]
+pub mod errors;
+pub mod dispatch;
+pub mod params;
 mod poll_manager;
 mod poll_filter;
 mod requests;
--- a/rpc/src/v1/helpers/network_settings.rs
+++ b/rpc/src/v1/helpers/network_settings.rs
@@ -22,10 +22,6 @@ pub struct NetworkSettings {
 	pub name: String,
 	/// Name of the chain we are connected to
 	pub chain: String,
-	/// Min number of peers
-	pub min_peers: u32,
-	/// Max number of peers
-	pub max_peers: u32,
 	/// Networking port
 	pub network_port: u16,
 	/// Is JSON-RPC server enabled?
@@ -41,8 +37,6 @@ impl Default for NetworkSettings {
 		NetworkSettings {
 			name: "".into(),
 			chain: "homestead".into(),
-			min_peers: 25,
-			max_peers: 50,
 			network_port: 30303,
 			rpc_enabled: true,
 			rpc_interface: "local".into(),
--- a/rpc/src/v1/helpers/params.rs
+++ b/rpc/src/v1/helpers/params.rs
@@ -0,0 +1,53 @@
+// 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/>.
+
+//! Parameters parsing helpers
+
+use serde;
+use jsonrpc_core::{Error, Params, from_params};
+use v1::types::BlockNumber;
+use v1::helpers::errors;
+
+pub fn expect_no_params(params: Params) -> Result<(), Error> {
+	match params {
+		Params::None => Ok(()),
+		p => Err(errors::invalid_params("No parameters were expected", p)),
+	}
+}
+
+fn params_len(params: &Params) -> usize {
+	match params {
+		&Params::Array(ref vec) => vec.len(),
+		_ => 0,
+	}
+}
+
+/// Deserialize request parameters with optional second parameter `BlockNumber` defaulting to `BlockNumber::Latest`.
+pub fn from_params_default_second<F>(params: Params) -> Result<(F, BlockNumber, ), Error> where F: serde::de::Deserialize {
+	match params_len(&params) {
+		1 => from_params::<(F, )>(params).map(|(f,)| (f, BlockNumber::Latest)),
+		_ => from_params::<(F, BlockNumber)>(params),
+	}
+}
+
+/// Deserialize request parameters with optional third parameter `BlockNumber` defaulting to `BlockNumber::Latest`.
+pub fn from_params_default_third<F1, F2>(params: Params) -> Result<(F1, F2, BlockNumber, ), Error> where F1: serde::de::Deserialize, F2: serde::de::Deserialize {
+	match params_len(&params) {
+		2 => from_params::<(F1, F2, )>(params).map(|(f1, f2)| (f1, f2, BlockNumber::Latest)),
+		_ => from_params::<(F1, F2, BlockNumber)>(params)
+	}
+}
+
--- a/rpc/src/v1/impls/eth.rs
+++ b/rpc/src/v1/impls/eth.rs
@@ -23,7 +23,6 @@ use std::process::{Command, Stdio};
 use std::thread;
 use std::time::{Instant, Duration};
 use std::sync::{Arc, Weak};
-use std::ops::Deref;
 use ethsync::{SyncProvider, SyncState};
 use ethcore::miner::{MinerService, ExternalMinerService};
 use jsonrpc_core::*;
@@ -43,8 +42,9 @@ use ethcore::filter::Filter as EthcoreFilter;
 use self::ethash::SeedHashCompute;
 use v1::traits::Eth;
 use v1::types::{Block, BlockTransactions, BlockNumber, Bytes, SyncStatus, SyncInfo, Transaction, CallRequest, Index, Filter, Log, Receipt, H64 as RpcH64, H256 as RpcH256, H160 as RpcH160, U256 as RpcU256};
-use v1::helpers::CallRequest as CRequest;
-use v1::impls::{default_gas_price, dispatch_transaction, error_codes, from_params_default_second, from_params_default_third};
+use v1::helpers::{CallRequest as CRequest, errors};
+use v1::helpers::dispatch::{default_gas_price, dispatch_transaction};
+use v1::helpers::params::{expect_no_params, from_params_default_second, from_params_default_third};

 /// Eth RPC options
 pub struct EthClientOptions {
@@ -107,7 +107,7 @@ impl<C, S: ?Sized, M, EM> EthClient<C, S, M, EM> where
 				let view = block_view.header_view();
 				let block = Block {
 					hash: Some(view.sha3().into()),
-					size: Some(bytes.len()),
+					size: Some(bytes.len().into()),
 					parent_hash: view.parent_hash().into(),
 					uncles_hash: view.uncles_hash().into(),
 					author: view.author().into(),
@@ -214,30 +214,6 @@ pub fn pending_logs<M>(miner: &M, filter: &EthcoreFilter) -> Vec<Log> where M: M

 const MAX_QUEUE_SIZE_TO_MINE_ON: usize = 4;	// because uncles go back 6.

-fn make_unsupported_err() -> Error {
-	Error {
-		code: ErrorCode::ServerError(error_codes::UNSUPPORTED_REQUEST_CODE),
-		message: "Unsupported request.".into(),
-		data: None
-	}
-}
-
-fn no_work_err() -> Error {
-	Error {
-		code: ErrorCode::ServerError(error_codes::NO_WORK_CODE),
-		message: "Still syncing.".into(),
-		data: None
-	}
-}
-
-fn no_author_err() -> Error {
-	Error {
-		code: ErrorCode::ServerError(error_codes::NO_AUTHOR_CODE),
-		message: "Author not configured. Run parity with --author to configure.".into(),
-		data: None
-	}
-}
-
 impl<C, S: ?Sized, M, EM> EthClient<C, S, M, EM> where
 	C: MiningBlockChainClient + 'static,
 	S: SyncProvider + 'static,
@@ -265,94 +241,80 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where

 	fn protocol_version(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => Ok(Value::String(format!("{}", take_weak!(self.sync).status().protocol_version).to_owned())),
-			_ => Err(Error::invalid_params())
-		}
+		try!(expect_no_params(params));
+
+		Ok(Value::String(format!("{}", take_weak!(self.sync).status().protocol_version).to_owned()))
 	}

 	fn syncing(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => {
-				let status = take_weak!(self.sync).status();
-				let res = match status.state {
-					SyncState::Idle => SyncStatus::None,
-					SyncState::Waiting | SyncState::Blocks | SyncState::NewBlocks | SyncState::ChainHead => {
-						let current_block = U256::from(take_weak!(self.client).chain_info().best_block_number);
-						let highest_block = U256::from(status.highest_block_number.unwrap_or(status.start_block_number));
+		try!(expect_no_params(params));

-						if highest_block > current_block + U256::from(6) {
-							let info = SyncInfo {
-								starting_block: status.start_block_number.into(),
-								current_block: current_block.into(),
-								highest_block: highest_block.into(),
-							};
-							SyncStatus::Info(info)
-						} else {
-							SyncStatus::None
-						}
-					}
-				};
-				to_value(&res)
+		let status = take_weak!(self.sync).status();
+		let res = match status.state {
+			SyncState::Idle => SyncStatus::None,
+			SyncState::Waiting | SyncState::Blocks | SyncState::NewBlocks | SyncState::ChainHead => {
+				let current_block = U256::from(take_weak!(self.client).chain_info().best_block_number);
+				let highest_block = U256::from(status.highest_block_number.unwrap_or(status.start_block_number));
+
+				if highest_block > current_block + U256::from(6) {
+					let info = SyncInfo {
+						starting_block: status.start_block_number.into(),
+						current_block: current_block.into(),
+						highest_block: highest_block.into(),
+					};
+					SyncStatus::Info(info)
+				} else {
+					SyncStatus::None
+				}
 			}
-			_ => Err(Error::invalid_params()),
-		}
+		};
+		to_value(&res)
 	}

 	fn author(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => to_value(&RpcH160::from(take_weak!(self.miner).author())),
-			_ => Err(Error::invalid_params()),
-		}
+		try!(expect_no_params(params));
+
+		to_value(&RpcH160::from(take_weak!(self.miner).author()))
 	}

 	fn is_mining(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => to_value(&(take_weak!(self.miner).is_sealing())),
-			_ => Err(Error::invalid_params())
-		}
+		try!(expect_no_params(params));
+
+		to_value(&(take_weak!(self.miner).is_sealing()))
 	}

 	fn hashrate(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => to_value(&RpcU256::from(self.external_miner.hashrate())),
-			_ => Err(Error::invalid_params())
-		}
+		try!(expect_no_params(params));
+
+		to_value(&RpcU256::from(self.external_miner.hashrate()))
 	}

 	fn gas_price(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => {
-				let (client, miner) = (take_weak!(self.client), take_weak!(self.miner));
-				to_value(&RpcU256::from(default_gas_price(&*client, &*miner)))
-			}
-			_ => Err(Error::invalid_params())
-		}
+		try!(expect_no_params(params));
+
+		let (client, miner) = (take_weak!(self.client), take_weak!(self.miner));
+		to_value(&RpcU256::from(default_gas_price(&*client, &*miner)))
 	}

 	fn accounts(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => {
-				let store = take_weak!(self.accounts);
-				let accounts = try!(store.accounts().map_err(|_| Error::internal_error()));
-				to_value(&accounts.into_iter().map(Into::into).collect::<Vec<RpcH160>>())
-			},
-			_ => Err(Error::invalid_params())
-		}
+		try!(expect_no_params(params));
+
+		let store = take_weak!(self.accounts);
+		let accounts = try!(store.accounts().map_err(|e| errors::internal("Could not fetch accounts.", e)));
+		to_value(&accounts.into_iter().map(Into::into).collect::<Vec<RpcH160>>())
 	}

 	fn block_number(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => to_value(&RpcU256::from(take_weak!(self.client).chain_info().best_block_number)),
-			_ => Err(Error::invalid_params())
-		}
+		try!(expect_no_params(params));
+
+		to_value(&RpcU256::from(take_weak!(self.client).chain_info().best_block_number))
 	}

 	fn balance(&self, params: Params) -> Result<Value, Error> {
@@ -361,8 +323,11 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where
 			.and_then(|(address, block_number,)| {
 				let address: Address = RpcH160::into(address);
 				match block_number {
-					BlockNumber::Pending => to_value(&RpcU256::from(take_weak!(self.miner).balance(take_weak!(self.client).deref(), &address))),
-					id => to_value(&RpcU256::from(try!(take_weak!(self.client).balance(&address, id.into()).ok_or_else(make_unsupported_err)))),
+					BlockNumber::Pending => to_value(&RpcU256::from(take_weak!(self.miner).balance(&*take_weak!(self.client), &address))),
+					id => match take_weak!(self.client).balance(&address, id.into()) {
+						Some(balance) => to_value(&RpcU256::from(balance)),
+						None => Err(errors::state_pruned()),
+					}
 				}
 			})
 	}
@@ -377,7 +342,7 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where
 					BlockNumber::Pending => to_value(&RpcU256::from(take_weak!(self.miner).storage_at(&*take_weak!(self.client), &address, &H256::from(position)))),
 					id => match take_weak!(self.client).storage_at(&address, &H256::from(position), id.into()) {
 						Some(s) => to_value(&RpcH256::from(s)),
-						None => Err(make_unsupported_err()), // None is only returned on unsupported requests.
+						None => Err(errors::state_pruned()),
 					}
 				}
 			})
@@ -390,8 +355,11 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where
 			.and_then(|(address, block_number,)| {
 				let address: Address = RpcH160::into(address);
 				match block_number {
-					BlockNumber::Pending => to_value(&RpcU256::from(take_weak!(self.miner).nonce(take_weak!(self.client).deref(), &address))),
-					id => to_value(&take_weak!(self.client).nonce(&address, id.into()).map(RpcU256::from)),
+					BlockNumber::Pending => to_value(&RpcU256::from(take_weak!(self.miner).nonce(&*take_weak!(self.client), &address))),
+					id => match take_weak!(self.client).nonce(&address, id.into()) {
+						Some(nonce) => to_value(&RpcU256::from(nonce)),
+						None => Err(errors::state_pruned()),
+					}
 				}
 			})
 	}
@@ -440,9 +408,11 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where
 			.and_then(|(address, block_number,)| {
 				let address: Address = RpcH160::into(address);
 				match block_number {
-					BlockNumber::Pending => to_value(&take_weak!(self.miner).code(take_weak!(self.client).deref(), &address).map_or_else(Bytes::default, Bytes::new)),
-					BlockNumber::Latest => to_value(&take_weak!(self.client).code(&address).map_or_else(Bytes::default, Bytes::new)),
-					_ => Err(Error::invalid_params()),
+					BlockNumber::Pending => to_value(&take_weak!(self.miner).code(&*take_weak!(self.client), &address).map_or_else(Bytes::default, Bytes::new)),
+					_ => match take_weak!(self.client).code(&address, block_number.into()) {
+						Some(code) => to_value(&code.map_or_else(Bytes::default, Bytes::new)),
+						None => Err(errors::state_pruned()),
+					},
 				}
 			})
 	}
@@ -463,11 +433,14 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where
 		try!(self.active());
 		from_params::<(RpcH256,)>(params)
 			.and_then(|(hash,)| {
-				let miner = take_weak!(self.miner);
 				let hash: H256 = hash.into();
-				match miner.transaction(&hash) {
-					Some(pending_tx) => to_value(&Transaction::from(pending_tx)),
-					None => self.transaction(TransactionID::Hash(hash))
+				let miner = take_weak!(self.miner);
+				let client = take_weak!(self.client);
+				let maybe_tx = client.transaction(TransactionID::Hash(hash)).map(Transaction::from)
+					.or_else(|| miner.transaction(&hash).map(Transaction::from));
+				match maybe_tx {
+					Some(t) => to_value(&t),
+					None => Ok(Value::Null),
 				}
 			})
 	}
@@ -490,8 +463,8 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where
 			.and_then(|(hash,)| {
 				let miner = take_weak!(self.miner);
 				let hash: H256 = hash.into();
-				match miner.pending_receipts().get(&hash) {
-					Some(receipt) if self.options.allow_pending_receipt_query => to_value(&Receipt::from(receipt.clone())),
+				match (miner.pending_receipt(&hash), self.options.allow_pending_receipt_query) {
+					(Some(receipt), true) => to_value(&Receipt::from(receipt)),
 					_ => {
 						let client = take_weak!(self.client);
 						let receipt = client.transaction_receipt(TransactionID::Hash(hash));
@@ -515,16 +488,13 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where

 	fn compilers(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => {
-				let mut compilers = vec![];
-				if Command::new(SOLC).output().is_ok() {
-					compilers.push("solidity".to_owned())
-				}
-				to_value(&compilers)
-			}
-			_ => Err(Error::invalid_params())
+		try!(expect_no_params(params));
+
+		let mut compilers = vec![];
+		if Command::new(SOLC).output().is_ok() {
+			compilers.push("solidity".to_owned())
 		}
+		to_value(&compilers)
 	}

 	fn logs(&self, params: Params) -> Result<Value, Error> {
@@ -539,7 +509,7 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where
 					.collect::<Vec<Log>>();

 				if include_pending {
-					let pending = pending_logs(take_weak!(self.miner).deref(), &filter);
+					let pending = pending_logs(&*take_weak!(self.miner), &filter);
 					logs.extend(pending);
 				}

@@ -549,45 +519,42 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where

 	fn work(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => {
-				let client = take_weak!(self.client);
-				// check if we're still syncing and return empty strings in that case
-				{
-					//TODO: check if initial sync is complete here
-					//let sync = take_weak!(self.sync);
-					if /*sync.status().state != SyncState::Idle ||*/ client.queue_info().total_queue_size() > MAX_QUEUE_SIZE_TO_MINE_ON {
-						trace!(target: "miner", "Syncing. Cannot give any work.");
-						return Err(no_work_err());
-					}
+		try!(expect_no_params(params));

-					// Otherwise spin until our submitted block has been included.
-					let timeout = Instant::now() + Duration::from_millis(1000);
-					while Instant::now() < timeout && client.queue_info().total_queue_size() > 0 {
-						thread::sleep(Duration::from_millis(1));
-					}
-				}
+		let client = take_weak!(self.client);
+		// check if we're still syncing and return empty strings in that case
+		{
+			//TODO: check if initial sync is complete here
+			//let sync = take_weak!(self.sync);
+			if /*sync.status().state != SyncState::Idle ||*/ client.queue_info().total_queue_size() > MAX_QUEUE_SIZE_TO_MINE_ON {
+				trace!(target: "miner", "Syncing. Cannot give any work.");
+				return Err(errors::no_work());
+			}

-				let miner = take_weak!(self.miner);
-				if miner.author().is_zero() {
-					warn!(target: "miner", "Cannot give work package - no author is configured. Use --author to configure!");
-					return Err(no_author_err())
-				}
-				miner.map_sealing_work(client.deref(), |b| {
-					let pow_hash = b.hash();
-					let target = Ethash::difficulty_to_boundary(b.block().header().difficulty());
-					let seed_hash = self.seed_compute.lock().get_seedhash(b.block().header().number());
-
-					if self.options.send_block_number_in_get_work {
-						let block_number = RpcU256::from(b.block().header().number());
-						to_value(&(RpcH256::from(pow_hash), RpcH256::from(seed_hash), RpcH256::from(target), block_number))
-					} else {
-						to_value(&(RpcH256::from(pow_hash), RpcH256::from(seed_hash), RpcH256::from(target)))
-					}
-				}).unwrap_or(Err(Error::internal_error()))	// no work found.
-			},
-			_ => Err(Error::invalid_params())
+			// Otherwise spin until our submitted block has been included.
+			let timeout = Instant::now() + Duration::from_millis(1000);
+			while Instant::now() < timeout && client.queue_info().total_queue_size() > 0 {
+				thread::sleep(Duration::from_millis(1));
+			}
 		}
+
+		let miner = take_weak!(self.miner);
+		if miner.author().is_zero() {
+			warn!(target: "miner", "Cannot give work package - no author is configured. Use --author to configure!");
+			return Err(errors::no_author())
+		}
+		miner.map_sealing_work(&*client, |b| {
+			let pow_hash = b.hash();
+			let target = Ethash::difficulty_to_boundary(b.block().header().difficulty());
+			let seed_hash = self.seed_compute.lock().get_seedhash(b.block().header().number());
+
+			if self.options.send_block_number_in_get_work {
+				let block_number = RpcU256::from(b.block().header().number());
+				to_value(&(RpcH256::from(pow_hash), RpcH256::from(seed_hash), RpcH256::from(target), block_number))
+			} else {
+				to_value(&(RpcH256::from(pow_hash), RpcH256::from(seed_hash), RpcH256::from(target)))
+			}
+		}).unwrap_or(Err(Error::internal_error()))	// no work found.
 	}

 	fn submit_work(&self, params: Params) -> Result<Value, Error> {
@@ -600,7 +567,7 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where
 			let miner = take_weak!(self.miner);
 			let client = take_weak!(self.client);
 			let seal = vec![encode(&mix_hash).to_vec(), encode(&nonce).to_vec()];
-			let r = miner.submit_seal(client.deref(), pow_hash, seal);
+			let r = miner.submit_seal(&*client, pow_hash, seal);
 			to_value(&r.is_ok())
 		})
 	}
@@ -627,13 +594,12 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where

 	fn call(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		trace!(target: "jsonrpc", "call: {:?}", params);
 		from_params_default_second(params)
 			.and_then(|(request, block_number,)| {
 				let request = CallRequest::into(request);
 				let signed = try!(self.sign_call(request));
 				let r = match block_number {
-					BlockNumber::Pending => take_weak!(self.miner).call(take_weak!(self.client).deref(), &signed, Default::default()),
+					BlockNumber::Pending => take_weak!(self.miner).call(&*take_weak!(self.client), &signed, Default::default()),
 					block_number => take_weak!(self.client).call(&signed, block_number.into(), Default::default()),
 				};
 				to_value(&r.map(|e| Bytes(e.output)).unwrap_or(Bytes::new(vec![])))
@@ -647,7 +613,7 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where
 				let request = CallRequest::into(request);
 				let signed = try!(self.sign_call(request));
 				let r = match block_number {
-					BlockNumber::Pending => take_weak!(self.miner).call(take_weak!(self.client).deref(), &signed, Default::default()),
+					BlockNumber::Pending => take_weak!(self.miner).call(&*take_weak!(self.client), &signed, Default::default()),
 					block => take_weak!(self.client).call(&signed, block.into(), Default::default()),
 				};
 				to_value(&RpcU256::from(r.map(|res| res.gas_used + res.refunded).unwrap_or(From::from(0))))
@@ -675,17 +641,23 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where
 					.stdout(Stdio::piped())
 					.stderr(Stdio::null())
 					.spawn();
-				if let Ok(mut child) = maybe_child {
-					if let Ok(_) = child.stdin.as_mut().expect("we called child.stdin(Stdio::piped()) before spawn; qed").write_all(code.as_bytes()) {
-						if let Ok(output) = child.wait_with_output() {
-							let s = String::from_utf8_lossy(&output.stdout);
-							if let Some(hex) = s.lines().skip_while(|ref l| !l.contains("Binary")).skip(1).next() {
-								return to_value(&Bytes::new(hex.from_hex().unwrap_or(vec![])));
-							}
+
+				maybe_child
+					.map_err(errors::compilation)
+					.and_then(|mut child| {
+						try!(child.stdin.as_mut()
+							.expect("we called child.stdin(Stdio::piped()) before spawn; qed")
+							.write_all(code.as_bytes())
+							.map_err(errors::compilation));
+						let output = try!(child.wait_with_output().map_err(errors::compilation));
+
+						let s = String::from_utf8_lossy(&output.stdout);
+						if let Some(hex) = s.lines().skip_while(|ref l| !l.contains("Binary")).skip(1).next() {
+							to_value(&Bytes::new(hex.from_hex().unwrap_or(vec![])))
+						} else {
+							Err(errors::compilation("Unexpected output."))
 						}
-					}
-				}
-				Err(Error::invalid_params())
+					})
 			})
 	}
 }
--- a/rpc/src/v1/impls/eth_filter.rs
+++ b/rpc/src/v1/impls/eth_filter.rs
@@ -16,7 +16,6 @@

 //! Eth Filter RPC implementation

-use std::ops::Deref;
 use std::sync::{Arc, Weak};
 use std::collections::HashSet;
 use jsonrpc_core::*;
@@ -27,6 +26,7 @@ use util::Mutex;
 use v1::traits::EthFilter;
 use v1::types::{BlockNumber, Index, Filter, Log, H256 as RpcH256, U256 as RpcU256};
 use v1::helpers::{PollFilter, PollManager};
+use v1::helpers::params::expect_no_params;
 use v1::impls::eth::pending_logs;

 /// Eth filter rpc implementation.
@@ -76,28 +76,22 @@ impl<C, M> EthFilter for EthFilterClient<C, M> where

 	fn new_block_filter(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => {
-				let mut polls = self.polls.lock();
-				let id = polls.create_poll(PollFilter::Block(take_weak!(self.client).chain_info().best_block_number));
-				to_value(&RpcU256::from(id))
-			},
-			_ => Err(Error::invalid_params())
-		}
+		try!(expect_no_params(params));
+
+		let mut polls = self.polls.lock();
+		let id = polls.create_poll(PollFilter::Block(take_weak!(self.client).chain_info().best_block_number));
+		to_value(&RpcU256::from(id))
 	}

 	fn new_pending_transaction_filter(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => {
-				let mut polls = self.polls.lock();
-				let pending_transactions = take_weak!(self.miner).pending_transactions_hashes();
-				let id = polls.create_poll(PollFilter::PendingTransaction(pending_transactions));
+		try!(expect_no_params(params));

-				to_value(&RpcU256::from(id))
-			},
-			_ => Err(Error::invalid_params())
-		}
+		let mut polls = self.polls.lock();
+		let pending_transactions = take_weak!(self.miner).pending_transactions_hashes();
+		let id = polls.create_poll(PollFilter::PendingTransaction(pending_transactions));
+
+		to_value(&RpcU256::from(id))
 	}

 	fn filter_changes(&self, params: Params) -> Result<Value, Error> {
@@ -165,7 +159,7 @@ impl<C, M> EthFilter for EthFilterClient<C, M> where

 							// additionally retrieve pending logs
 							if include_pending {
-								let pending_logs = pending_logs(take_weak!(self.miner).deref(), &filter);
+								let pending_logs = pending_logs(&*take_weak!(self.miner), &filter);

 								// remove logs about which client was already notified about
 								let new_pending_logs: Vec<_> = pending_logs.iter()
@@ -206,7 +200,7 @@ impl<C, M> EthFilter for EthFilterClient<C, M> where
 							.collect::<Vec<Log>>();

 						if include_pending {
-							logs.extend(pending_logs(take_weak!(self.miner).deref(), &filter));
+							logs.extend(pending_logs(&*take_weak!(self.miner), &filter));
 						}

 						to_value(&logs)
--- a/rpc/src/v1/impls/eth_signing.rs
+++ b/rpc/src/v1/impls/eth_signing.rs
@@ -23,10 +23,10 @@ use ethcore::client::MiningBlockChainClient;
 use util::{U256, Address, H256, Mutex};
 use transient_hashmap::TransientHashMap;
 use ethcore::account_provider::AccountProvider;
-use v1::helpers::{SigningQueue, ConfirmationPromise, ConfirmationResult, ConfirmationsQueue, ConfirmationPayload, TransactionRequest as TRequest, FilledTransactionRequest as FilledRequest};
+use v1::helpers::{errors, SigningQueue, ConfirmationPromise, ConfirmationResult, ConfirmationsQueue, ConfirmationPayload, TransactionRequest as TRequest, FilledTransactionRequest as FilledRequest};
+use v1::helpers::dispatch::{default_gas_price, sign_and_dispatch};
 use v1::traits::EthSigning;
 use v1::types::{TransactionRequest, H160 as RpcH160, H256 as RpcH256, H520 as RpcH520, U256 as RpcU256};
-use v1::impls::{default_gas_price, sign_and_dispatch, request_rejected_error, request_not_found_error, signer_disabled_error};

 fn fill_optional_fields<C, M>(request: TRequest, client: &C, miner: &M) -> FilledRequest
 	where C: MiningBlockChainClient, M: MinerService {
@@ -151,10 +151,10 @@ impl<C, M> EthSigning for EthSigningQueueClient<C, M>
 			let res = match pending.get(&id) {
 				Some(ref promise) => match promise.result() {
 					ConfirmationResult::Waiting => { return Ok(Value::Null); }
-					ConfirmationResult::Rejected => Err(request_rejected_error()),
+					ConfirmationResult::Rejected => Err(errors::request_rejected()),
 					ConfirmationResult::Confirmed(rpc_response) => rpc_response,
 				},
-				_ => { return Err(request_not_found_error()); }
+				_ => { return Err(errors::request_not_found()); }
 			};
 			pending.remove(&id);
 			res
@@ -217,16 +217,16 @@ impl<C, M> EthSigning for EthSigningUnsafeClient<C, M> where

 	fn post_sign(&self, _: Params) -> Result<Value, Error> {
 		// We don't support this in non-signer mode.
-		Err(signer_disabled_error())
+		Err(errors::signer_disabled())
 	}

 	fn post_transaction(&self, _: Params) -> Result<Value, Error> {
 		// We don't support this in non-signer mode.
-		Err(signer_disabled_error())
+		Err(errors::signer_disabled())
 	}

 	fn check_request(&self, _: Params) -> Result<Value, Error> {
 		// We don't support this in non-signer mode.
-		Err(signer_disabled_error())
+		Err(errors::signer_disabled())
 	}
 }
--- a/rpc/src/v1/impls/ethcore.rs
+++ b/rpc/src/v1/impls/ethcore.rs
@@ -15,37 +15,52 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 //! Ethcore-specific rpc implementation.
-use util::{RotatingLogger};
-use util::misc::version_data;
 use std::sync::{Arc, Weak};
-use std::ops::Deref;
+use std::str::FromStr;
 use std::collections::{BTreeMap};
-use ethcore::client::{MiningBlockChainClient};
-use jsonrpc_core::*;
+use util::{RotatingLogger, Address};
+use util::misc::version_data;
+use ethsync::{SyncProvider, ManageNetwork};
 use ethcore::miner::MinerService;
+use ethcore::client::{MiningBlockChainClient};
+
+use jsonrpc_core::*;
 use v1::traits::Ethcore;
-use v1::types::{Bytes, U256};
-use v1::helpers::{SigningQueue, ConfirmationsQueue, NetworkSettings};
-use v1::impls::signer_disabled_error;
+use v1::types::{Bytes, U256, Peers, H160, Transaction};
+use v1::helpers::{errors, SigningQueue, ConfirmationsQueue, NetworkSettings};
+use v1::helpers::params::expect_no_params;

 /// Ethcore implementation.
-pub struct EthcoreClient<C, M> where
+pub struct EthcoreClient<C, M, S: ?Sized> where
 	C: MiningBlockChainClient,
-	M: MinerService {
+	M: MinerService,
+	S: SyncProvider {

 	client: Weak<C>,
 	miner: Weak<M>,
+	sync: Weak<S>,
+	net: Weak<ManageNetwork>,
 	logger: Arc<RotatingLogger>,
 	settings: Arc<NetworkSettings>,
 	confirmations_queue: Option<Arc<ConfirmationsQueue>>,
 }

-impl<C, M> EthcoreClient<C, M> where C: MiningBlockChainClient, M: MinerService {
+impl<C, M, S: ?Sized> EthcoreClient<C, M, S> where C: MiningBlockChainClient, M: MinerService, S: SyncProvider {
 	/// Creates new `EthcoreClient`.
-	pub fn new(client: &Arc<C>, miner: &Arc<M>, logger: Arc<RotatingLogger>, settings: Arc<NetworkSettings>, queue: Option<Arc<ConfirmationsQueue>>) -> Self {
+	pub fn new(
+		client: &Arc<C>,
+		miner: &Arc<M>,
+		sync: &Arc<S>,
+		net: &Arc<ManageNetwork>,
+		logger: Arc<RotatingLogger>,
+		settings: Arc<NetworkSettings>,
+		queue: Option<Arc<ConfirmationsQueue>>
+	) -> Self {
 		EthcoreClient {
 			client: Arc::downgrade(client),
 			miner: Arc::downgrade(miner),
+			sync: Arc::downgrade(sync),
+			net: Arc::downgrade(net),
 			logger: logger,
 			settings: settings,
 			confirmations_queue: queue,
@@ -59,66 +74,97 @@ impl<C, M> EthcoreClient<C, M> where C: MiningBlockChainClient, M: MinerService
 	}
 }

-impl<C, M> Ethcore for EthcoreClient<C, M> where M: MinerService + 'static, C: MiningBlockChainClient + 'static {
+impl<C, M, S: ?Sized> Ethcore for EthcoreClient<C, M, S> where M: MinerService + 'static, C: MiningBlockChainClient + 'static, S: SyncProvider + 'static {

-	fn transactions_limit(&self, _: Params) -> Result<Value, Error> {
+	fn transactions_limit(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
 		to_value(&take_weak!(self.miner).transactions_limit())
 	}

-	fn min_gas_price(&self, _: Params) -> Result<Value, Error> {
+	fn min_gas_price(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
 		to_value(&U256::from(take_weak!(self.miner).minimal_gas_price()))
 	}

-	fn extra_data(&self, _: Params) -> Result<Value, Error> {
+	fn extra_data(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
 		to_value(&Bytes::new(take_weak!(self.miner).extra_data()))
 	}

-	fn gas_floor_target(&self, _: Params) -> Result<Value, Error> {
+	fn gas_floor_target(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
 		to_value(&U256::from(take_weak!(self.miner).gas_floor_target()))
 	}

-	fn gas_ceil_target(&self, _: Params) -> Result<Value, Error> {
+	fn gas_ceil_target(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
 		to_value(&U256::from(take_weak!(self.miner).gas_ceil_target()))
 	}

-	fn dev_logs(&self, _params: Params) -> Result<Value, Error> {
+	fn dev_logs(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
 		let logs = self.logger.logs();
-		to_value(&logs.deref().as_slice())
+		to_value(&logs.as_slice())
 	}

-	fn dev_logs_levels(&self, _params: Params) -> Result<Value, Error> {
+	fn dev_logs_levels(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
 		to_value(&self.logger.levels())
 	}

-	fn net_chain(&self, _params: Params) -> Result<Value, Error> {
+	fn net_chain(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
 		to_value(&self.settings.chain)
 	}

-	fn net_max_peers(&self, _params: Params) -> Result<Value, Error> {
+	fn net_peers(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		to_value(&self.settings.max_peers)
+		try!(expect_no_params(params));
+
+		let sync_status = take_weak!(self.sync).status();
+		let net_config = take_weak!(self.net).network_config();
+
+		to_value(&Peers {
+			active: sync_status.num_active_peers,
+			connected: sync_status.num_peers,
+			max: sync_status.current_max_peers(net_config.min_peers, net_config.max_peers),
+		})
 	}

-	fn net_port(&self, _params: Params) -> Result<Value, Error> {
+	fn net_port(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
 		to_value(&self.settings.network_port)
 	}

-	fn node_name(&self, _params: Params) -> Result<Value, Error> {
+	fn node_name(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
 		to_value(&self.settings.name)
 	}

-	fn rpc_settings(&self, _params: Params) -> Result<Value, Error> {
+	fn registry_address(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
+		let r = take_weak!(self.client)
+			.additional_params()
+			.get("registrar")
+			.and_then(|s| Address::from_str(s).ok())
+			.map(|s| H160::from(s));
+		to_value(&r)
+	}
+
+	fn rpc_settings(&self, params: Params) -> Result<Value, Error> {
+		try!(self.active());
+		try!(expect_no_params(params));
 		let mut map = BTreeMap::new();
 		map.insert("enabled".to_owned(), Value::Bool(self.settings.rpc_enabled));
 		map.insert("interface".to_owned(), Value::String(self.settings.rpc_interface.clone()));
@@ -128,31 +174,37 @@ impl<C, M> Ethcore for EthcoreClient<C, M> where M: MinerService + 'static, C: M

 	fn default_extra_data(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => to_value(&Bytes::new(version_data())),
-			_ => Err(Error::invalid_params()),
-		}
+		try!(expect_no_params(params));
+		to_value(&Bytes::new(version_data()))
 	}

 	fn gas_price_statistics(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		match params {
-			Params::None => match take_weak!(self.client).gas_price_statistics(100, 8) {
-				Ok(stats) => to_value(&stats
-					.into_iter()
-					.map(|x| to_value(&U256::from(x)).expect("x must be U256; qed"))
-					.collect::<Vec<_>>()),
-				_ => Err(Error::internal_error()),
-			},
-			_ => Err(Error::invalid_params()),
+		try!(expect_no_params(params));
+
+		match take_weak!(self.client).gas_price_statistics(100, 8) {
+			Ok(stats) => to_value(&stats
+				.into_iter()
+				.map(|x| to_value(&U256::from(x)).expect("x must be U256; qed"))
+				.collect::<Vec<_>>()),
+			_ => Err(Error::internal_error()),
 		}
 	}

-	fn unsigned_transactions_count(&self, _params: Params) -> Result<Value, Error> {
+	fn unsigned_transactions_count(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
+
 		match self.confirmations_queue {
-			None => Err(signer_disabled_error()),
+			None => Err(errors::signer_disabled()),
 			Some(ref queue) => to_value(&queue.len()),
 		}
 	}
+
+	fn pending_transactions(&self, params: Params) -> Result<Value, Error> {
+		try!(self.active());
+		try!(expect_no_params(params));
+
+		to_value(&take_weak!(self.miner).all_transactions().into_iter().map(Into::into).collect::<Vec<Transaction>>())
+	}
 }
--- a/rpc/src/v1/impls/ethcore_set.rs
+++ b/rpc/src/v1/impls/ethcore_set.rs
@@ -20,6 +20,8 @@ use jsonrpc_core::*;
 use ethcore::miner::MinerService;
 use ethcore::client::MiningBlockChainClient;
 use ethsync::ManageNetwork;
+use v1::helpers::errors;
+use v1::helpers::params::expect_no_params;
 use v1::traits::EthcoreSet;
 use v1::types::{Bytes, H160, U256};

@@ -117,7 +119,7 @@ impl<C, M> EthcoreSet for EthcoreSetClient<C, M> where
 		from_params::<(String,)>(params).and_then(|(peer,)| {
 			match take_weak!(self.net).add_reserved_peer(peer) {
 				Ok(()) => to_value(&true),
-				Err(_) => Err(Error::invalid_params()),
+				Err(e) => Err(errors::invalid_params("Peer address", e)),
 			}
 		})
 	}
@@ -127,29 +129,33 @@ impl<C, M> EthcoreSet for EthcoreSetClient<C, M> where
 		from_params::<(String,)>(params).and_then(|(peer,)| {
 			match take_weak!(self.net).remove_reserved_peer(peer) {
 				Ok(()) => to_value(&true),
-				Err(_) => Err(Error::invalid_params()),
+				Err(e) => Err(errors::invalid_params("Peer address", e)),
 			}
 		})
 	}

-	fn drop_non_reserved_peers(&self, _: Params) -> Result<Value, Error> {
+	fn drop_non_reserved_peers(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
 		take_weak!(self.net).deny_unreserved_peers();
 		to_value(&true)
 	}

-	fn accept_non_reserved_peers(&self, _: Params) -> Result<Value, Error> {
+	fn accept_non_reserved_peers(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
+		try!(expect_no_params(params));
 		take_weak!(self.net).accept_unreserved_peers();
 		to_value(&true)
 	}

-	fn start_network(&self, _: Params) -> Result<Value, Error> {
+	fn start_network(&self, params: Params) -> Result<Value, Error> {
+		try!(expect_no_params(params));
 		take_weak!(self.net).start_network();
 		Ok(Value::Bool(true))
 	}

-	fn stop_network(&self, _: Params) -> Result<Value, Error> {
+	fn stop_network(&self, params: Params) -> Result<Value, Error> {
+		try!(expect_no_params(params));
 		take_weak!(self.net).stop_network();
 		Ok(Value::Bool(true))
 	}
--- a/rpc/src/v1/impls/mod.rs
+++ b/rpc/src/v1/impls/mod.rs
@@ -25,21 +25,17 @@ macro_rules! take_weak {
 	}
 }

-macro_rules! rpc_unimplemented {
-	() => (Err(Error::internal_error()))
-}
-
-mod web3;
 mod eth;
 mod eth_filter;
 mod eth_signing;
+mod ethcore;
+mod ethcore_set;
 mod net;
 mod personal;
 mod personal_signer;
-mod ethcore;
-mod ethcore_set;
-mod traces;
 mod rpc;
+mod traces;
+mod web3;

 pub use self::web3::Web3Client;
 pub use self::eth::{EthClient, EthClientOptions};
@@ -53,202 +49,3 @@ pub use self::ethcore_set::EthcoreSetClient;
 pub use self::traces::TracesClient;
 pub use self::rpc::RpcClient;

-use serde;
-use v1::helpers::TransactionRequest;
-use v1::types::{H256 as RpcH256, H520 as RpcH520, BlockNumber};
-use ethcore::error::Error as EthcoreError;
-use ethcore::miner::MinerService;
-use ethcore::client::MiningBlockChainClient;
-use ethcore::transaction::{Action, SignedTransaction, Transaction};
-use ethcore::account_provider::{AccountProvider, Error as AccountError};
-use util::numbers::*;
-use util::rlp::encode;
-use util::bytes::ToPretty;
-use jsonrpc_core::{Error, ErrorCode, Value, to_value, from_params, Params};
-
-mod error_codes {
-	// NOTE [ToDr] Codes from [-32099, -32000]
-	pub const UNSUPPORTED_REQUEST_CODE: i64 = -32000;
-	pub const NO_WORK_CODE: i64 = -32001;
-	pub const NO_AUTHOR_CODE: i64 = -32002;
-	pub const UNKNOWN_ERROR: i64 = -32009;
-	pub const TRANSACTION_ERROR: i64 = -32010;
-	pub const ACCOUNT_LOCKED: i64 = -32020;
-	pub const PASSWORD_INVALID: i64 = -32021;
-	pub const SIGNER_DISABLED: i64 = -32030;
-	pub const REQUEST_REJECTED: i64 = -32040;
-	pub const REQUEST_NOT_FOUND: i64 = -32041;
-}
-
-fn params_len(params: &Params) -> usize {
-	match params {
-		&Params::Array(ref vec) => vec.len(),
-		_ => 0,
-	}
-}
-
-/// Deserialize request parameters with optional second parameter `BlockNumber` defaulting to `BlockNumber::Latest`.
-pub fn from_params_default_second<F>(params: Params) -> Result<(F, BlockNumber, ), Error> where F: serde::de::Deserialize {
-	match params_len(&params) {
-		1 => from_params::<(F, )>(params).map(|(f,)| (f, BlockNumber::Latest)),
-		_ => from_params::<(F, BlockNumber)>(params),
-	}
-}
-
-/// Deserialize request parameters with optional third parameter `BlockNumber` defaulting to `BlockNumber::Latest`.
-pub fn from_params_default_third<F1, F2>(params: Params) -> Result<(F1, F2, BlockNumber, ), Error> where F1: serde::de::Deserialize, F2: serde::de::Deserialize {
-	match params_len(&params) {
-		2 => from_params::<(F1, F2, )>(params).map(|(f1, f2)| (f1, f2, BlockNumber::Latest)),
-		_ => from_params::<(F1, F2, BlockNumber)>(params)
-	}
-}
-
-
-fn dispatch_transaction<C, M>(client: &C, miner: &M, signed_transaction: SignedTransaction) -> Result<Value, Error>
-	where C: MiningBlockChainClient, M: MinerService {
-	let hash = RpcH256::from(signed_transaction.hash());
-
-	let import = miner.import_own_transaction(client, signed_transaction);
-
-	import
-		.map_err(transaction_error)
-		.and_then(|_| to_value(&hash))
-}
-
-fn signature_with_password(accounts: &AccountProvider, address: Address, hash: H256, pass: String) -> Result<Value, Error> {
-	accounts.sign_with_password(address, pass, hash)
-		.map_err(password_error)
-		.and_then(|hash| to_value(&RpcH520::from(hash)))
-}
-
-fn prepare_transaction<C, M>(client: &C, miner: &M, request: TransactionRequest) -> Transaction where C: MiningBlockChainClient, M: MinerService {
-	Transaction {
-		nonce: request.nonce
-			.or_else(|| miner
-					 .last_nonce(&request.from)
-					 .map(|nonce| nonce + U256::one()))
-			.unwrap_or_else(|| client.latest_nonce(&request.from)),
-
-		action: request.to.map_or(Action::Create, Action::Call),
-		gas: request.gas.unwrap_or_else(|| miner.sensible_gas_limit()),
-		gas_price: request.gas_price.unwrap_or_else(|| default_gas_price(client, miner)),
-		value: request.value.unwrap_or_else(U256::zero),
-		data: request.data.map_or_else(Vec::new, |b| b.to_vec()),
-	}
-}
-
-fn unlock_sign_and_dispatch<C, M>(client: &C, miner: &M, request: TransactionRequest, account_provider: &AccountProvider, password: String) -> Result<Value, Error>
-	where C: MiningBlockChainClient, M: MinerService {
-
-	let address = request.from;
-	let signed_transaction = {
-		let t = prepare_transaction(client, miner, request);
-		let hash = t.hash();
-		let signature = try!(account_provider.sign_with_password(address, password, hash).map_err(password_error));
-		t.with_signature(signature)
-	};
-
-	trace!(target: "miner", "send_transaction: dispatching tx: {}", encode(&signed_transaction).to_vec().pretty());
-	dispatch_transaction(&*client, &*miner, signed_transaction)
-}
-
-fn sign_and_dispatch<C, M>(client: &C, miner: &M, request: TransactionRequest, account_provider: &AccountProvider, address: Address) -> Result<Value, Error>
-	where C: MiningBlockChainClient, M: MinerService {
-
-	let signed_transaction = {
-		let t = prepare_transaction(client, miner, request);
-		let hash = t.hash();
-		let signature = try!(account_provider.sign(address, hash).map_err(signing_error));
-		t.with_signature(signature)
-	};
-
-	trace!(target: "miner", "send_transaction: dispatching tx: {}", encode(&signed_transaction).to_vec().pretty());
-	dispatch_transaction(&*client, &*miner, signed_transaction)
-}
-
-fn default_gas_price<C, M>(client: &C, miner: &M) -> U256 where C: MiningBlockChainClient, M: MinerService {
-	client
-		.gas_price_statistics(100, 8)
-		.map(|x| x[4])
-		.unwrap_or_else(|_| miner.sensible_gas_price())
-}
-
-fn signer_disabled_error() -> Error {
-	Error {
-		code: ErrorCode::ServerError(error_codes::SIGNER_DISABLED),
-		message: "Trusted Signer is disabled. This API is not available.".into(),
-		data: None
-	}
-}
-
-fn signing_error(error: AccountError) -> Error {
-	Error {
-		code: ErrorCode::ServerError(error_codes::ACCOUNT_LOCKED),
-		message: "Your account is locked. Unlock the account via CLI, personal_unlockAccount or use Trusted Signer.".into(),
-		data: Some(Value::String(format!("{:?}", error))),
-	}
-}
-
-fn password_error(error: AccountError) -> Error {
-	Error {
-		code: ErrorCode::ServerError(error_codes::PASSWORD_INVALID),
-		message: "Account password is invalid or account does not exist.".into(),
-		data: Some(Value::String(format!("{:?}", error))),
-	}
-}
-
-/// Error returned when request is rejected (in Trusted Signer).
-pub fn request_rejected_error() -> Error {
-	Error {
-		code: ErrorCode::ServerError(error_codes::REQUEST_REJECTED),
-		message: "Request has been rejected.".into(),
-		data: None,
-	}
-}
-
-/// Error returned when request is not found in queue.
-pub fn request_not_found_error() -> Error {
-	Error {
-		code: ErrorCode::ServerError(error_codes::REQUEST_NOT_FOUND),
-		message: "Request not found.".into(),
-		data: None,
-	}
-}
-
-fn transaction_error(error: EthcoreError) -> Error {
-	use ethcore::error::TransactionError::*;
-
-	if let EthcoreError::Transaction(e) = error {
-		let msg = match e {
-			AlreadyImported => "Transaction with the same hash was already imported.".into(),
-			Old => "Transaction nonce is too low. Try incrementing the nonce.".into(),
-			TooCheapToReplace => {
-				"Transaction fee is too low. There is another transaction with same nonce in the queue. Try increasing the fee or incrementing the nonce.".into()
-			},
-			LimitReached => {
-				"There are too many transactions in the queue. Your transaction was dropped due to limit. Try increasing the fee.".into()
-			},
-			InsufficientGasPrice { minimal, got } => {
-				format!("Transaction fee is too low. It does not satisfy your node's minimal fee (minimal: {}, got: {}). Try increasing the fee.", minimal, got)
-			},
-			InsufficientBalance { balance, cost } => {
-				format!("Insufficient funds. Account you try to send transaction from does not have enough funds. Required {} and got: {}.", cost, balance)
-			},
-			GasLimitExceeded { limit, got } => {
-				format!("Transaction cost exceeds current gas limit. Limit: {}, got: {}. Try decreasing supplied gas.", limit, got)
-			},
-			InvalidGasLimit(_) => "Supplied gas is beyond limit.".into(),
-		};
-		Error {
-			code: ErrorCode::ServerError(error_codes::TRANSACTION_ERROR),
-			message: msg,
-			data: None,
-		}
-	} else {
-		Error {
-			code: ErrorCode::ServerError(error_codes::UNKNOWN_ERROR),
-			message: "Unknown error when sending transaction.".into(),
-			data: Some(Value::String(format!("{:?}", error))),
-		}
-	}
-}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Denis S. Soldatov aka General-Beck	df4d98001a	update gitlab-ci set RUST 1.11 for windows	2016-10-04 14:43:49 +08:00
Robert Habermeier	2e4672ea13	Merge pull request #2414 from ethcore/compilation-beta fix broken beta compilation (backport to beta)	2016-10-02 21:07:35 +02:00
Arkadiy Paronyan	7f7fe33bde	Jumptable cache (#2435 ) * v1.3.3 * Jumptable cache	2016-10-02 19:52:53 +02:00
Arkadiy Paronyan	3d313d592a	Disabling debug symbols due to rustc 1.12 memory usage regression	2016-10-02 09:45:27 +02:00
NikVolf	abc6970d08	fix ethkey more	2016-10-01 15:29:11 +03:00
NikVolf	fa636d402d	ethkey eq	2016-10-01 13:04:08 +03:00
NikVolf	73d6666294	some checksums	2016-10-01 00:28:31 +03:00
Denis S. Soldatov aka General-Beck	f16ccacd22	Update gitlab-ci add checksum	2016-09-30 21:03:05 +07:00
Nikolay Volf	ba3de5d3b9	rayon bump	2016-09-30 02:25:35 +03:00
Robert Habermeier	f16de5501a	fix broken beta compilation	2016-09-29 23:03:02 +03:00
Arkadiy Paronyan	e298ab30e4	Quick fix for missing tree route blocks (#2400 )	2016-09-29 14:47:13 +02:00
Tomasz Drwięga	63d3a4dd59	Beta Backports (#2396 ) * Removing extras data from retracted blocks. (#2375) * Removing extras data from retracted blocks. * Adding a test case Conflicts: ethcore/src/blockchain/blockchain.rs * Fixing transaction queue Conflicts: ethcore/src/miner/transaction_queue.rs * Prioritizing re-imported transactions (#2372) * Prioritizing re-imported transactions * Fixing compilation on beta Conflicts: Cargo.lock ethcore/src/client/client.rs ethcore/src/miner/transaction_queue.rs * Post-merge fixes	2016-09-29 13:19:53 +02:00
Arkadiy Paronyan	0e55b6c6c9	Cache the fork block header after snapshot restoration (#2391 )	2016-09-29 12:34:40 +02:00
Nikolay Volf	4d115987cb	Accounts bloom (#2357 ) * proper bloom * incremental bloom updates * crate update * return of the column * fix n^2 byteorder write * add notes to funs * working bloom commits * Optimizations * bloom diag * migration basic * migration ongoing * migration finalizing * mingration api workarounds * fix test_client setups * snapshot bloom update * review fixes * just forward keys in the migration * migration extra tracing * fix migration path * remove close pray * review issues	2016-09-29 11:27:41 +02:00
Tomasz Drwięga	2d623f14db	Disable colors for signer token in beta (#2379 )	2016-09-28 23:33:50 +02:00
Robert Habermeier	1d1a3b9d02	correct sync memory usage calculation (#2386 )	2016-09-28 23:00:27 +02:00
Arkadiy Paronyan	1d69b0e124	Fixing jit feature compilation (#2376 ) * Fixing jit feature compilation * Fixing jit feature compilation (#2310) Conflicts: Cargo.lock * Delegatecall support	2016-09-28 17:25:32 +02:00
Arkadiy Paronyan	3c59475be6	Clear state cache on sealed block import (#2377 )	2016-09-28 17:24:47 +02:00
Denis S. Soldatov aka General-Beck	facab31551	Update gitlab-ci add RUST_BACKTRACE=1 in test stage	2016-09-28 01:52:17 +07:00
Arkadiy Paronyan	c9cfcd2728	Canonical state cache (#2308 ) * State cache * Reduced copying data between caches Whitespace and optional symbols * Set a limit on storage cache * Style and docs	2016-09-27 16:44:32 +02:00
Arkadiy Paronyan	557dbb73b8	DIV optimization (#2353 )	2016-09-27 14:04:08 +02:00
Gav Wood	6f772a28e2	Reorder transaction_by_hash to favour canon search (#2331 ) * Reorder transaction_by_hash to favour canon search * Fix test.	2016-09-27 12:16:42 +02:00
Tomasz Drwięga	16f3119547	Lenient bytes deserialization (#2340 ) * Lenient bytes deserialization * Error when deserializing invalid hex * Error when deserializing invalid hex Conflicts: rpc/src/v1/types/bytes.rs	2016-09-27 11:24:27 +02:00
Tomasz Drwięga	c3741640f7	Penalize transactions with gas above gas limit (#2271 ) * Handle RLP to string UTF-8 decoding errors (#2217) * Penalize transactions with gas above gas limit * Avoid penalizing legit transactions * saturating not overflowing * Remove crufty code * Introduce gas price ordering. * Gas before gas-price, as long as the minimum price is met. * saturating add	2016-09-25 12:14:39 +02:00
Denis S. Soldatov aka General-Beck	decca7f698	Update gitlab-ci deploy fix	2016-09-24 05:01:48 +07:00
Denis S. Soldatov aka General-Beck	fc53726c7f	Update gitlab-ci fix armv7 path	2016-09-24 03:00:22 +07:00
Denis S. Soldatov aka General-Beck	e2b81bc08d	Update gitlab-ci [ci skip] rename x86_64-unknown-centos-gnu	2016-09-24 00:11:23 +07:00
Denis S. Soldatov aka General-Beck	4d2d1eac1f	Update gitlab-ci fix path in arm	2016-09-23 23:45:57 +07:00
Denis S. Soldatov aka General-Beck	5572e3dd1d	Update gitlab-ci fix windows deploy to S3 add ubuntu 14.04 build	2016-09-23 23:40:25 +07:00
Tomasz Drwięga	0db1c0d336	Peek transaction queue via RPC (#2270 ) * Handle RLP to string UTF-8 decoding errors (#2217) * pending transactions	2016-09-23 18:13:03 +02:00
Denis S. Soldatov aka General-Beck	905f04dc9d	Update Ubuntu arm Dockerfile [ci skip] remove CC and CXX env backport to beta https://github.com/ethcore/parity/pull/2064	2016-09-23 21:35:04 +07:00
Denis S. Soldatov aka General-Beck	f560cf360c	Update Dockerfile ubuntu-aarch64 [ci skip] remove CC and CXX env backport to beta https://github.com/ethcore/parity/pull/2064	2016-09-23 21:34:16 +07:00
Tomasz Drwięga	f5d48cbf2a	Handle RLP to string UTF-8 decoding errors (#2217 ) (#2226 )	2016-09-22 14:48:54 +02:00
Denis S. Soldatov aka General-Beck	d59e2ecbc6	Update gitlab-ci fix x86_64-pc-windows-msvc	2016-09-21 22:36:54 +07:00
Denis S. Soldatov aka General-Beck	a97ca5aaf4	Update gitlab-ci remove -export	2016-09-21 22:25:51 +07:00
Tomasz Drwięga	df61b1b328	Fixing compilation without ui feature (#2207 )	2016-09-21 11:51:49 +01:00
Tomasz Drwięga	52a69d19e6	Avoid cloning clean stuff (#2173 )	2016-09-20 23:10:26 +08:00
Arkadiy Paronyan	33084aaa07	v1.3.2 (#2200 )	2016-09-20 14:21:17 +08:00
Arkadiy Paronyan	2a82fa0a47	Backports to beta (#2068 ) * Fix several RPCs (#1926) * Fix up pending receipts details. * Add support for additional params and registry over RPC. * Fix tests. * Add test, additional fix. Fixes #1932. * Fix up tests. * Fix test. * Fix test. * DB WAL size limit (#1935) * Limit WAL size * Check pruning by db modification date (#1924) * Cache address hash (#1943) * ECIES without MAC (#1948) * Use random IV for ECIES AES * ECIES encrypt/decrypt for a single message * Derive IV from shared secret * Apply settings to column families * fixed #1933 (#1979) * Fixed neighbours collection (#1996) * dapps-hosts configuration * Disabled counter check * always process trie death row on commit, add more tracing * fixed transaction addresses mapping, fixes #1971 * simplified iterator * v1.3.1 * v1.3.1	2016-09-11 14:04:17 +02:00
Denis S. Soldatov aka General-Beck	1ccc90108c	Update gitlab-ci	2016-09-10 00:59:40 +07:00
Marek Kotewicz	e60c5b59a6	Fixing serde overflow error (#1977 ) (#2030 )	2016-09-01 12:23:05 +02:00
Denis S. Soldatov aka General-Beck	b199fbb6c6	Update gitlab-ci clone from master	2016-08-27 02:59:47 +07:00
Denis S. Soldatov aka General-Beck	d9d506db57	Update gitlab-ci remove CC&CXX env from beta branch	2016-08-19 12:18:37 +07:00
Arkadiy Paronyan	425e1ce04c	Check pruning by db modification date (#1924 )	2016-08-12 17:48:11 +02:00
Tomasz Drwięga	8741d0d155	Bumping Parity UI (#1920 )	2016-08-12 12:58:31 +02:00
Arkadiy Paronyan	dfb2ddfdc2	Backports to beta (#1919 ) * RPC errors & logs (#1845) * Refactoring errors in RPC * Updating jsonrpc-core * Fixing code_at * Avoid mentioning obvious segments in proof [ci:skip] * fixed cache_manager lock order * Purging .derefs, fixing clippy warnings. (#1890) * Fixing clippy warnings * Purging derefs * Simplifying engine derefs * Simplifying more engine derefs * Adding more details to miner log * fixed #1889, .DS_Store is no longer treated as key file (#1892) * fixed #1889, .DS_Store is no longer treated as key file * ethstore filters directories, hidden files and common system files * fixed compiling * fix regression with geth dir * fix regression with geth dir * Fix ipc compilation and add ipc feature to test targets (#1902) * fix compilation and add it to the ci run * no separator? * use quotes and spaces * RocksDB version bump * Don't return deleted nodes that are not yet flushed (#1908) * polling & connection timeouts (#1910) * Peers RPC + UI displaying active/connected/max peers (#1915) * Peers API * Bumping Parity-UI * Fixing tests * Save nodes removed from backing_overlay until commit (#1917)	2016-08-12 12:16:20 +02:00
Arkadiy Paronyan	52ac5a00f5	Backports for beta (#1888 ) * Sync to peers with confirmed fork block only (#1863) * Fixing gas conversion * Validating u256->usize conversion * Update cache usage on commiting block info (#1871) * Use UntrustedRlp for block verification (#1872) * take snapshot at specified block and slightly better informants (#1873) * prettier informant for snapshot creation * allow taking snapshot at a given block * minor tweaks * elaborate on cli * Send new block hashes to all peers (#1875) * Reduce max open files (#1876) * ws-rs update * Fixing test * Fixing miner deadlock (#1885)	2016-08-09 14:05:02 +02:00
arkpar	6336bdecf3	Version set to beta	2016-08-06 08:08:27 +02:00