diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index bf7f51d71..f929aedda 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -21,13 +21,15 @@ linux-stable:
     - export
     - cargo build --release --verbose
     - strip target/release/parity
+    - mkdir -p x86_64-unknown-linux-gnu/stable
+    - cp target/release/parity x86_64-unknown-linux-gnu/stable/parity
   tags:
     - rust
     - rust-stable
   artifacts:
     paths:
-    - target/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    - x86_64-unknown-linux-gnu/stable/parity
+    name: "stable-x86_64-unknown-linux-gnu_parity"
 linux-beta:
   stage: build
   image: ethcore/rust:beta
@@ -40,14 +42,16 @@ linux-beta:
     - export
     - cargo build --release --verbose
     - strip target/release/parity
-    - cp target/release/parity parity
+    - mkdir -p x86_64-unknown-linux-gnu/beta
+    - cp target/release/parity x86_64-unknown-linux-gnu/beta/parity
   tags:
     - rust
     - rust-beta
   artifacts:
     paths:
-    - target/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    - x86_64-unknown-linux-gnu/beta/parity
+    name: "beta-x86_64-unknown-linux-gnu_parity"
+  allow_failure: true
 linux-nightly:
   stage: build
   image: ethcore/rust:nightly
@@ -59,13 +63,15 @@ linux-nightly:
   script:
     - cargo build --release --verbose
     - strip target/release/parity
+    - mkdir -p x86_64-unknown-linux-gnu/nightly
+    - cp target/release/parity x86_64-unknown-linux-gnu/nigthly/parity
   tags:
     - rust
     - rust-nightly
   artifacts:
     paths:
-    - target/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    - x86_64-unknown-linux-gnu/nigthly/parity
+    name: "nigthly-x86_64-unknown-linux-gnu_parity"
   allow_failure: true
 linux-centos:
   stage: build
@@ -80,13 +86,15 @@ linux-centos:
     - export CC="gcc"
     - cargo build --release --verbose
     - strip target/release/parity
+    - mkdir -p x86_64-unknown-linux-gnu/centos
+    - cp target/release/parity x86_64-unknown-linux-gnu/centos/parity
   tags:
     - rust
     - rust-centos
   artifacts:
     paths:
-    - target/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    - x86_64-unknown-linux-gnu/centos/parity
+    name: "centos-x86_64-unknown-linux-gnu_parity"
 linux-armv7:
   stage: build
   image: ethcore/rust-arm:latest
@@ -97,7 +105,6 @@ linux-armv7:
     - stable
   script:
     - export
-    - export CXX="arm-linux-gnueabihf-g++"
     - rm -rf .cargo
     - mkdir -p .cargo
     - echo "[target.armv7-unknown-linux-gnueabihf]" >> .cargo/config
@@ -105,13 +112,15 @@ linux-armv7:
     - cat .cargo/config
     - cargo build --target armv7-unknown-linux-gnueabihf --release --verbose
     - arm-linux-gnueabihf-strip target/armv7-unknown-linux-gnueabihf/release/parity
+    - mkdir -p armv7_unknown_linux_gnueabihf
+    - cp target/release/party armv7_unknown_linux_gnueabihf/parity
   tags:
     - rust
     - rust-arm
   artifacts:
     paths:
-    - target/armv7-unknown-linux-gnueabihf/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    - armv7-unknown-linux-gnueabihf/parity
+    name: "armv7_unknown_linux_gnueabihf_parity"
   allow_failure: true
 linux-arm:
   stage: build
@@ -123,20 +132,22 @@ linux-arm:
     - stable
   script:
     - export
-    #- rm -rf .cargo
-    #- mkdir -p .cargo
-    #- echo "[target.arm-unknown-linux-gnueabihf]" >> .cargo/config
-    #- echo "linker= \"arm-linux-gnueabihf-gcc\"" >> .cargo/config
-    #- cat .cargo/config
+    - rm -rf .cargo
+    - mkdir -p .cargo
+    - echo "[target.arm-unknown-linux-gnueabihf]" >> .cargo/config
+    - echo "linker= \"arm-linux-gnueabihf-gcc\"" >> .cargo/config
+    - cat .cargo/config
     - cargo build --target arm-unknown-linux-gnueabihf --release --verbose
     - arm-linux-gnueabihf-strip target/arm-unknown-linux-gnueabihf/release/parity
+    - mkdir -p arm-unknown-linux-gnueabihf
+    - cp target/release/parity arm-unknown-linux-gnueabihf/parity
   tags:
     - rust
     - rust-arm
   artifacts:
     paths:
-    - target/arm-unknown-linux-gnueabihf/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    - arm-unknown-linux-gnueabihf/parity
+    name: "arm-unknown-linux-gnueabihf_parity"
   allow_failure: true
 linux-armv6:
   stage: build
@@ -148,20 +159,22 @@ linux-armv6:
     - stable
   script:
     - export
-    #- 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
+    - 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
+    - mkdir -p arm-unknown-linux-gnueabi
+    - cp target/release/parity arm-unknown-linux-gnueabi/parity
   tags:
     - rust
     - rust-arm
   artifacts:
     paths:
-    - target/arm-unknown-linux-gnueabi/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    - arm-unknown-linux-gnueabi/parity
+    name: "arm-unknown-linux-gnueabi_parity"
   allow_failure: true
 linux-aarch64:
   stage: build
@@ -173,20 +186,22 @@ linux-aarch64:
     - stable
   script:
     - export
-    #- rm -rf .cargo
-    #- mkdir -p .cargo
-    #- echo "[target.aarch64-unknown-linux-gnu]" >> .cargo/config
-    #- echo "linker= \"aarch64-linux-gnu-gcc\"" >> .cargo/config
-    #- cat .cargo/config
+    - rm -rf .cargo
+    - mkdir -p .cargo
+    - echo "[target.aarch64-unknown-linux-gnu]" >> .cargo/config
+    - echo "linker= \"aarch64-linux-gnu-gcc\"" >> .cargo/config
+    - cat .cargo/config
     - cargo build --target aarch64-unknown-linux-gnu --release --verbose
     - aarch64-linux-gnu-strip target/aarch64-unknown-linux-gnu/release/parity
+    - mkdir -p aarch64-unknown-linux-gnu
+    - cp target/release/parity aarch64-unknown-linux-gnu/parity
   tags:
     - rust
     - rust-arm
   artifacts:
     paths:
-    - target/aarch64-unknown-linux-gnu/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    - aarch64-unknown-linux-gnu/parity
+    name: "aarch64-unknown-linux-gnu_parity"
   allow_failure: true
 darwin:
   stage: build
@@ -197,12 +212,14 @@ darwin:
     - stable
   script:
     - cargo build --release --verbose
+    - mkdir -p x86_64-apple-darwin
+    - cp target/release/parity x86_64-apple-darwin/parity
   tags:
     - osx
   artifacts:
     paths:
-    - target/release/parity
-    name: "${CI_BUILD_NAME}_parity"
+    - x86_64-apple-darwin/parity
+    name: "x86_64-apple-darwin_parity"
 windows:
   stage: build
   only:
@@ -222,7 +239,7 @@ windows:
     paths:
     - target/release/parity.exe
     - target/release/parity.pdb
-    name: "${CI_BUILD_NAME}_parity"
+    name: "x86_64-pc-windows-msvc_parity"
 test-linux:
   stage: test
   before_script:
@@ -241,4 +258,4 @@ deploy-binaries:
     - tags
     - stable
   script:
-    - ./deploy.sh
+    - scripts/deploy.sh
diff --git a/Cargo.lock b/Cargo.lock
index 10479bde0..063a3aa5e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,7 +3,7 @@ name = "parity"
 version = "1.4.0"
 dependencies = [
  "ansi_term 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "clippy 0.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
  "ctrlc 1.1.1 (git+https://github.com/ethcore/rust-ctrlc.git)",
  "daemonize 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "docopt 0.6.80 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -38,6 +38,7 @@ dependencies = [
  "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "semver 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "toml 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -84,16 +85,6 @@ name = "base64"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "bigint"
-version = "0.1.0"
-dependencies = [
- "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "bit-set"
 version = "0.4.0"
@@ -147,15 +138,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "clippy"
-version = "0.0.85"
+version = "0.0.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "clippy_lints 0.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy_lints 0.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "clippy_lints"
-version = "0.0.85"
+version = "0.0.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "matches 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -277,7 +268,7 @@ version = "1.4.0"
 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)",
- "clippy 0.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.90 (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)",
  "ethash 1.4.0",
@@ -296,7 +287,7 @@ dependencies = [
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "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)",
  "rlp 0.1.0",
  "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)",
@@ -304,18 +295,28 @@ dependencies = [
  "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "ethcore-bigint"
+version = "0.1.0"
+dependencies = [
+ "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "ethcore-dapps"
 version = "1.4.0"
 dependencies = [
- "clippy 0.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethabi 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethcore-devtools 1.4.0",
  "ethcore-rpc 1.4.0",
  "ethcore-util 1.4.0",
  "https-fetch 0.1.0",
  "hyper 0.9.4 (git+https://github.com/ethcore/hyper)",
- "jsonrpc-core 3.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 3.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "jsonrpc-http-server 6.1.0 (git+https://github.com/ethcore/jsonrpc-http-server.git)",
  "linked-hash-map 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -450,7 +451,7 @@ dependencies = [
 name = "ethcore-rpc"
 version = "1.4.0"
 dependencies = [
- "clippy 0.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethash 1.4.0",
  "ethcore 1.4.0",
  "ethcore-devtools 1.4.0",
@@ -462,7 +463,7 @@ dependencies = [
  "ethstore 0.1.0",
  "ethsync 1.4.0",
  "json-ipc-server 0.2.4 (git+https://github.com/ethcore/json-ipc-server.git)",
- "jsonrpc-core 3.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 3.0.2 (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)",
  "rlp 0.1.0",
@@ -478,13 +479,13 @@ dependencies = [
 name = "ethcore-signer"
 version = "1.4.0"
 dependencies = [
- "clippy 0.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethcore-devtools 1.4.0",
  "ethcore-io 1.4.0",
  "ethcore-rpc 1.4.0",
  "ethcore-util 1.4.0",
- "jsonrpc-core 3.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 3.0.2 (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 1.4.0 (git+https://github.com/ethcore/parity-ui.git)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -503,7 +504,7 @@ dependencies = [
  "ethcore-ipc-nano 1.4.0",
  "ethcore-util 1.4.0",
  "json-tcp-server 0.1.0 (git+https://github.com/ethcore/json-tcp-server)",
- "jsonrpc-core 3.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 3.0.2 (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 (git+https://github.com/ethcore/mio?branch=v0.5.x)",
@@ -516,11 +517,11 @@ version = "1.4.0"
 dependencies = [
  "ansi_term 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "arrayvec 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "bigint 0.1.0",
- "clippy 0.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
  "elastic-array 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "eth-secp256k1 0.5.4 (git+https://github.com/ethcore/rust-secp256k1)",
+ "ethcore-bigint 0.1.0",
  "ethcore-devtools 1.4.0",
  "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.4.13 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -547,8 +548,8 @@ dependencies = [
 name = "ethcrypto"
 version = "0.1.0"
 dependencies = [
- "bigint 0.1.0",
  "eth-secp256k1 0.5.4 (git+https://github.com/ethcore/rust-secp256k1)",
+ "ethcore-bigint 0.1.0",
  "ethkey 0.2.0",
  "rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "tiny-keccak 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -569,9 +570,9 @@ dependencies = [
 name = "ethkey"
 version = "0.2.0"
 dependencies = [
- "bigint 0.1.0",
  "docopt 0.6.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "eth-secp256k1 0.5.4 (git+https://github.com/ethcore/rust-secp256k1)",
+ "ethcore-bigint 0.1.0",
  "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -602,7 +603,7 @@ dependencies = [
 name = "ethsync"
 version = "1.4.0"
 dependencies = [
- "clippy 0.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.90 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethcore 1.4.0",
  "ethcore-devtools 1.4.0",
@@ -773,7 +774,7 @@ source = "git+https://github.com/ethcore/json-ipc-server.git#5fbd0253750d3097b9a
 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 3.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 3.0.2 (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)",
@@ -788,7 +789,7 @@ source = "git+https://github.com/ethcore/json-tcp-server#c2858522274ae56042472bb
 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 3.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 3.0.2 (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)",
@@ -797,7 +798,7 @@ dependencies = [
 
 [[package]]
 name = "jsonrpc-core"
-version = "3.0.0"
+version = "3.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -810,10 +811,10 @@ dependencies = [
 [[package]]
 name = "jsonrpc-http-server"
 version = "6.1.0"
-source = "git+https://github.com/ethcore/jsonrpc-http-server.git#339f7209b01d26aea01722b3a69127235287d6a9"
+source = "git+https://github.com/ethcore/jsonrpc-http-server.git#2766c6708f66f6f4e667211461d220b49c0d9fdf"
 dependencies = [
  "hyper 0.9.4 (git+https://github.com/ethcore/hyper)",
- "jsonrpc-core 3.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 3.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1308,7 +1309,7 @@ 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)",
@@ -1346,8 +1347,8 @@ dependencies = [
 name = "rlp"
 version = "0.1.0"
 dependencies = [
- "bigint 0.1.0",
  "elastic-array 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ethcore-bigint 0.1.0",
  "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1678,6 +1679,14 @@ dependencies = [
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "toml"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "traitobject"
 version = "0.0.1"
@@ -1856,8 +1865,8 @@ dependencies = [
 "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 clippy 0.0.85 (registry+https://github.com/rust-lang/crates.io-index)" = "97f6d6efa6d7aec74d4eca1be62164b605d43b7fcb5256e9db0449f685130cba"
-"checksum clippy_lints 0.0.85 (registry+https://github.com/rust-lang/crates.io-index)" = "dc96d3c877b63943b08ce3037c0ae8fd3bd5dead5fab11178b93afc71ca16031"
+"checksum clippy 0.0.90 (registry+https://github.com/rust-lang/crates.io-index)" = "d19bda68c3db98e3a780342f6101b44312fef20a5f13ce756d1202a35922b01b"
+"checksum clippy_lints 0.0.90 (registry+https://github.com/rust-lang/crates.io-index)" = "3d4ed67c69b9bb35169be2538691d290a3aa0cbfd4b9f0bfb7c221fc1d399a96"
 "checksum cookie 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "90266f45846f14a1e986c77d1e9c2626b8c342ed806fe60241ec38cc8697b245"
 "checksum crossbeam 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)" = "fb974f835e90390c5f9dfac00f05b06dc117299f5ea4e85fbc7bb443af4911cc"
 "checksum ctrlc 1.1.1 (git+https://github.com/ethcore/rust-ctrlc.git)" = "<none>"
@@ -1943,7 +1952,7 @@ 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 ring 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d059a6a96d3be79042e3f70eb97945912839265f9d8ab45b921abaf266c70dbb"
@@ -1985,6 +1994,7 @@ dependencies = [
 "checksum time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)" = "3c7ec6d62a20df54e07ab3b78b9a3932972f4b7981de295563686849eb3989af"
 "checksum tiny-keccak 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "f7aef43048292ca0bae4ab32180e85f6202cf2816c2a210c396a84b99dab9270"
 "checksum toml 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)" = "fcd27a04ca509aff336ba5eb2abc58d456f52c4ff64d9724d88acb85ead560b6"
+"checksum toml 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a442dfc13508e603c3f763274361db7f79d7469a0e95c411cde53662ab30fc72"
 "checksum traitobject 0.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "07eaeb7689bb7fca7ce15628319635758eda769fed481ecfe6686ddef2600616"
 "checksum transient-hashmap 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "15f7cc7116182edca1ed08f6f8c4da92104555ca77addbabea4eaa59b20373d0"
 "checksum typeable 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1410f6f91f21d1612654e7cc69193b0334f909dcf2c790c4826254fbb86f8887"
diff --git a/Cargo.toml b/Cargo.toml
index 112a36312..913b4c5f2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,6 +25,7 @@ ansi_term = "0.7"
 lazy_static = "0.2"
 regex = "0.1"
 isatty = "0.1"
+toml = "0.2"
 ctrlc = { git = "https://github.com/ethcore/rust-ctrlc.git" }
 fdlimit = { path = "util/fdlimit" }
 ethcore = { path = "ethcore" }
@@ -41,7 +42,7 @@ ethcore-logger = { path = "logger" }
 rlp = { path = "util/rlp" }
 json-ipc-server = { git = "https://github.com/ethcore/json-ipc-server.git" }
 ethcore-dapps = { path = "dapps", optional = true }
-clippy = { version = "0.0.85", optional = true}
+clippy = { version = "0.0.90", optional = true}
 ethcore-stratum = { path = "stratum" }
 
 [target.'cfg(windows)'.dependencies]
diff --git a/dapps/Cargo.toml b/dapps/Cargo.toml
index 742d59bf2..b1883e748 100644
--- a/dapps/Cargo.toml
+++ b/dapps/Cargo.toml
@@ -33,7 +33,7 @@ parity-dapps-status = { git = "https://github.com/ethcore/parity-ui.git", versio
 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 = "0.0.85", optional = true}
+clippy = { version = "0.0.90", optional = true}
 
 [build-dependencies]
 serde_codegen = { version = "0.8", optional = true }
diff --git a/dapps/src/tests/redirection.rs b/dapps/src/tests/redirection.rs
index 2fdecbd4d..1a360cd08 100644
--- a/dapps/src/tests/redirection.rs
+++ b/dapps/src/tests/redirection.rs
@@ -115,7 +115,7 @@ fn should_serve_rpc() {
 
 	// then
 	assert_eq!(response.status, "HTTP/1.1 200 OK".to_owned());
-	assert_eq!(response.body, format!("57\n{}\n0\n\n", r#"{"jsonrpc":"2.0","error":{"code":-32700,"message":"Parse error","data":null},"id":null}"#));
+	assert_eq!(response.body, format!("58\n{}\n\n0\n\n", r#"{"jsonrpc":"2.0","error":{"code":-32700,"message":"Parse error","data":null},"id":null}"#));
 }
 
 #[test]
@@ -137,7 +137,7 @@ fn should_serve_rpc_at_slash_rpc() {
 
 	// then
 	assert_eq!(response.status, "HTTP/1.1 200 OK".to_owned());
-	assert_eq!(response.body, format!("57\n{}\n0\n\n", r#"{"jsonrpc":"2.0","error":{"code":-32700,"message":"Parse error","data":null},"id":null}"#));
+	assert_eq!(response.body, format!("58\n{}\n\n0\n\n", r#"{"jsonrpc":"2.0","error":{"code":-32700,"message":"Parse error","data":null},"id":null}"#));
 }
 
 
diff --git a/db/Cargo.toml b/db/Cargo.toml
index c7cbba2ea..15ceb9b3b 100644
--- a/db/Cargo.toml
+++ b/db/Cargo.toml
@@ -11,7 +11,7 @@ build = "build.rs"
 ethcore-ipc-codegen = { path = "../ipc/codegen" }
 
 [dependencies]
-clippy = { version = "0.0.85", optional = true}
+clippy = { version = "0.0.90", optional = true}
 ethcore-devtools = { path = "../devtools" }
 ethcore-ipc = { path = "../ipc/rpc" }
 rocksdb = { git = "https://github.com/ethcore/rust-rocksdb" }
diff --git a/ethash/src/compute.rs b/ethash/src/compute.rs
index bb297d709..a99a0e3b5 100644
--- a/ethash/src/compute.rs
+++ b/ethash/src/compute.rs
@@ -91,7 +91,7 @@ pub struct Light {
 	seed_compute: Mutex<SeedHashCompute>,
 }
 
-/// Light cache structur
+/// Light cache structure
 impl Light {
 	/// Create a new light cache for a given block number
 	pub fn new(block_number: u64) -> Light {
@@ -134,16 +134,27 @@ impl Light {
 		})
 	}
 
-	pub fn to_file(&self) -> io::Result<()> {
+	pub fn to_file(&self) -> io::Result<PathBuf> {
 		let seed_compute = self.seed_compute.lock();
 		let path = Light::file_path(seed_compute.get_seedhash(self.block_number));
+
+		if self.block_number >= ETHASH_EPOCH_LENGTH * 2 {
+			let deprecated = Light::file_path(
+				seed_compute.get_seedhash(self.block_number - ETHASH_EPOCH_LENGTH * 2));
+
+			if deprecated.exists() {
+				debug!(target: "ethash", "removing: {:?}", &deprecated);
+				try!(fs::remove_file(deprecated));
+			}
+		}
+
 		try!(fs::create_dir_all(path.parent().unwrap()));
-		let mut file = try!(File::create(path));
+		let mut file = try!(File::create(&path));
 
 		let cache_size = self.cache.len() * NODE_BYTES;
 		let buf = unsafe { slice::from_raw_parts(self.cache.as_ptr() as *const u8, cache_size) };
 		try!(file.write(buf));
-		Ok(())
+		Ok(path)
 	}
 }
 
@@ -455,3 +466,18 @@ fn test_seed_compute_after_newer() {
 	let hash = [241, 175, 44, 134, 39, 121, 245, 239, 228, 236, 43, 160, 195, 152, 46, 7, 199, 5, 253, 147, 241, 206, 98, 43, 3, 104, 17, 40, 192, 79, 106, 162];
 	assert_eq!(seed_compute.get_seedhash(486382), hash);
 }
+
+#[test]
+fn test_drop_old_data() {
+	let first = Light::new(0).to_file().unwrap();
+
+	let second = Light::new(ETHASH_EPOCH_LENGTH).to_file().unwrap();
+	assert!(fs::metadata(&first).is_ok());
+
+	let _ = Light::new(ETHASH_EPOCH_LENGTH * 2).to_file();
+	assert!(fs::metadata(&first).is_err());
+	assert!(fs::metadata(&second).is_ok());
+
+	let _ = Light::new(ETHASH_EPOCH_LENGTH * 3).to_file();
+	assert!(fs::metadata(&second).is_err());
+}
diff --git a/ethcore/Cargo.toml b/ethcore/Cargo.toml
index fe6a682cb..3ad9e69c4 100644
--- a/ethcore/Cargo.toml
+++ b/ethcore/Cargo.toml
@@ -20,12 +20,12 @@ num_cpus = "0.2"
 crossbeam = "0.2.9"
 lazy_static = "0.2"
 bloomchain = "0.1"
-rayon = "0.3.1"
+rayon = "0.4.2"
 semver = "0.2"
 bit-set = "0.4"
 time = "0.1"
 evmjit = { path = "../evmjit", optional = true }
-clippy = { version = "0.0.85", optional = true}
+clippy = { version = "0.0.90", optional = true}
 ethash = { path = "../ethash" }
 ethcore-util = { path = "../util" }
 ethcore-io = { path = "../util/io" }
diff --git a/ethcore/src/block.rs b/ethcore/src/block.rs
index 0b42d6838..88894618c 100644
--- a/ethcore/src/block.rs
+++ b/ethcore/src/block.rs
@@ -417,7 +417,7 @@ impl ClosedBlock {
 	}
 
 	/// Given an engine reference, reopen the `ClosedBlock` into an `OpenBlock`.
-	pub fn reopen<'a>(self, engine: &'a Engine) -> OpenBlock<'a> {
+	pub fn reopen(self, engine: &Engine) -> OpenBlock {
 		// revert rewards (i.e. set state back at last transaction's state).
 		let mut block = self.block;
 		block.state = self.unclosed_state;
diff --git a/ethcore/src/blockchain/blockchain.rs b/ethcore/src/blockchain/blockchain.rs
index ef26a6b08..392581fd1 100644
--- a/ethcore/src/blockchain/blockchain.rs
+++ b/ethcore/src/blockchain/blockchain.rs
@@ -23,6 +23,7 @@ use header::*;
 use super::extras::*;
 use transaction::*;
 use views::*;
+use log_entry::{LogEntry, LocalizedLogEntry};
 use receipt::Receipt;
 use blooms::{Bloom, BloomGroup};
 use blockchain::block_info::{BlockInfo, BlockLocation, BranchBecomingCanonChainData};
@@ -127,6 +128,10 @@ pub trait BlockProvider {
 
 	/// Returns numbers of blocks containing given bloom.
 	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockNumber, to_block: BlockNumber) -> Vec<BlockNumber>;
+
+	/// Returns logs matching given filter.
+	fn logs<F>(&self, mut blocks: Vec<BlockNumber>, matches: F, limit: Option<usize>) -> Vec<LocalizedLogEntry>
+		where F: Fn(&LogEntry) -> bool, Self: Sized;
 }
 
 #[derive(Debug, Hash, Eq, PartialEq, Clone)]
@@ -315,6 +320,51 @@ impl BlockProvider for BlockChain {
 			.map(|b| b as BlockNumber)
 			.collect()
 	}
+
+	fn logs<F>(&self, mut blocks: Vec<BlockNumber>, matches: F, limit: Option<usize>) -> Vec<LocalizedLogEntry>
+		where F: Fn(&LogEntry) -> bool, Self: Sized {
+		// sort in reverse order
+		blocks.sort_by(|a, b| b.cmp(a));
+
+		let mut log_index = 0;
+		let mut logs = blocks.into_iter()
+			.filter_map(|number| self.block_hash(number).map(|hash| (number, hash)))
+			.filter_map(|(number, hash)| self.block_receipts(&hash).map(|r| (number, hash, r.receipts)))
+			.filter_map(|(number, hash, receipts)| self.block_body(&hash).map(|ref b| (number, hash, receipts, BodyView::new(b).transaction_hashes())))
+			.flat_map(|(number, hash, mut receipts, hashes)| {
+				assert_eq!(receipts.len(), hashes.len());
+				log_index = receipts.iter().fold(0, |sum, receipt| sum + receipt.logs.len());
+
+				let receipts_len = receipts.len();
+				receipts.reverse();
+				receipts.into_iter()
+					.map(|receipt| receipt.logs)
+					.zip(hashes)
+					.enumerate()
+					.flat_map(move |(index, (mut logs, tx_hash))| {
+						let current_log_index = log_index;
+						log_index -= logs.len();
+
+						logs.reverse();
+						logs.into_iter()
+							.enumerate()
+							.map(move |(i, log)| LocalizedLogEntry {
+								entry: log,
+								block_hash: hash,
+								block_number: number,
+								transaction_hash: tx_hash,
+								// iterating in reverse order
+								transaction_index: receipts_len - index - 1,
+								log_index: current_log_index - i - 1,
+							})
+					})
+			})
+			.filter(|log_entry| matches(&log_entry.entry))
+			.take(limit.unwrap_or(::std::usize::MAX))
+			.collect::<Vec<LocalizedLogEntry>>();
+		logs.reverse();
+		logs
+	}
 }
 
 pub struct AncestryIter<'a> {
@@ -1160,6 +1210,7 @@ mod tests {
 	use blockchain::extras::TransactionAddress;
 	use views::BlockView;
 	use transaction::{Transaction, Action};
+	use log_entry::{LogEntry, LocalizedLogEntry};
 
 	fn new_db(path: &str) -> Arc<Database> {
 		Arc::new(Database::open(&DatabaseConfig::with_columns(::db::NUM_COLUMNS), path).unwrap())
@@ -1235,7 +1286,7 @@ mod tests {
 		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
 
 		let mut block_hashes = vec![genesis_hash.clone()];
-		let mut batch =db.transaction();
+		let mut batch = db.transaction();
 		for _ in 0..10 {
 			let block = canon_chain.generate(&mut finalizer).unwrap();
 			block_hashes.push(BlockView::new(&block).header_view().sha3());
@@ -1566,7 +1617,7 @@ mod tests {
 		let mut block_header = bc.block_header(&best_hash);
 
 		while !block_header.is_none() {
-			block_header = bc.block_header(&block_header.unwrap().parent_hash());
+			block_header = bc.block_header(block_header.unwrap().parent_hash());
 		}
 		assert!(bc.cache_size().blocks > 1024 * 1024);
 
@@ -1612,13 +1663,134 @@ mod tests {
 	}
 
 	fn insert_block(db: &Arc<Database>, bc: &BlockChain, bytes: &[u8], receipts: Vec<Receipt>) -> ImportRoute {
-		let mut batch =db.transaction();
+		let mut batch = db.transaction();
 		let res = bc.insert_block(&mut batch, bytes, receipts);
 		db.write(batch).unwrap();
 		bc.commit();
 		res
 	}
 
+	#[test]
+	fn test_logs() {
+		// given
+		let mut canon_chain = ChainGenerator::default();
+		let mut finalizer = BlockFinalizer::default();
+		let genesis = canon_chain.generate(&mut finalizer).unwrap();
+		// just insert dummy transaction so that #transactions=#receipts
+		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: 0.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: 0.into(),
+			gas_price: 0.into(),
+			gas: 100_000.into(),
+			action: Action::Create,
+			value: 100.into(),
+			data: "601080600c6000396000f3006000355415600957005b60203560003555".from_hex().unwrap(),
+		}.sign(&"".sha3());
+		let tx_hash1 = t1.hash();
+		let tx_hash2 = t2.hash();
+		let tx_hash3 = t3.hash();
+		let b1 = canon_chain.with_transaction(t1).with_transaction(t2).generate(&mut finalizer).unwrap();
+		let b2 = canon_chain.with_transaction(t3).generate(&mut finalizer).unwrap();
+
+		let temp = RandomTempPath::new();
+		let db = new_db(temp.as_str());
+		let bc = BlockChain::new(Config::default(), &genesis, db.clone());
+		insert_block(&db, &bc, &b1, vec![Receipt {
+			state_root: H256::default(),
+			gas_used: 10_000.into(),
+			log_bloom: Default::default(),
+			logs: vec![
+				LogEntry { address: Default::default(), topics: vec![], data: vec![1], },
+				LogEntry { address: Default::default(), topics: vec![], data: vec![2], },
+			],
+		},
+		Receipt {
+			state_root: H256::default(),
+			gas_used: 10_000.into(),
+			log_bloom: Default::default(),
+			logs: vec![
+				LogEntry { address: Default::default(), topics: vec![], data: vec![3], },
+			],
+		}]);
+		insert_block(&db, &bc, &b2, vec![
+			Receipt {
+				state_root: H256::default(),
+				gas_used: 10_000.into(),
+				log_bloom: Default::default(),
+				logs: vec![
+					LogEntry { address: Default::default(), topics: vec![], data: vec![4], },
+				],
+			}
+		]);
+
+		// when
+		let block1 = BlockView::new(&b1);
+		let block2 = BlockView::new(&b2);
+		let logs1 = bc.logs(vec![1, 2], |_| true, None);
+		let logs2 = bc.logs(vec![1, 2], |_| true, Some(1));
+
+		// then
+		assert_eq!(logs1, vec![
+			LocalizedLogEntry {
+				entry: LogEntry { address: Default::default(), topics: vec![], data: vec![1] },
+				block_hash: block1.hash(),
+				block_number: block1.header().number(),
+				transaction_hash: tx_hash1.clone(),
+				transaction_index: 0,
+				log_index: 0,
+			},
+			LocalizedLogEntry {
+				entry: LogEntry { address: Default::default(), topics: vec![], data: vec![2] },
+				block_hash: block1.hash(),
+				block_number: block1.header().number(),
+				transaction_hash: tx_hash1.clone(),
+				transaction_index: 0,
+				log_index: 1,
+			},
+			LocalizedLogEntry {
+				entry: LogEntry { address: Default::default(), topics: vec![], data: vec![3] },
+				block_hash: block1.hash(),
+				block_number: block1.header().number(),
+				transaction_hash: tx_hash2.clone(),
+				transaction_index: 1,
+				log_index: 2,
+			},
+			LocalizedLogEntry {
+				entry: LogEntry { address: Default::default(), topics: vec![], data: vec![4] },
+				block_hash: block2.hash(),
+				block_number: block2.header().number(),
+				transaction_hash: tx_hash3.clone(),
+				transaction_index: 0,
+				log_index: 0,
+			}
+		]);
+		assert_eq!(logs2, vec![
+			LocalizedLogEntry {
+				entry: LogEntry { address: Default::default(), topics: vec![], data: vec![4] },
+				block_hash: block2.hash(),
+				block_number: block2.header().number(),
+				transaction_hash: tx_hash3.clone(),
+				transaction_index: 0,
+				log_index: 0,
+			}
+		]);
+	}
+
 	#[test]
 	fn test_bloom_filter_simple() {
 		// TODO: From here
diff --git a/ethcore/src/client/client.rs b/ethcore/src/client/client.rs
index 228751069..ad2c3fc8b 100644
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@@ -968,10 +968,8 @@ impl BlockChainClient for Client {
 		}
 	}
 
-	fn logs(&self, filter: Filter) -> Vec<LocalizedLogEntry> {
-		// TODO: lock blockchain only once
-
-		let mut blocks = filter.bloom_possibilities().iter()
+	fn logs(&self, filter: Filter, limit: Option<usize>) -> Vec<LocalizedLogEntry> {
+		let blocks = filter.bloom_possibilities().iter()
 			.filter_map(|bloom| self.blocks_with_bloom(bloom, filter.from_block.clone(), filter.to_block.clone()))
 			.flat_map(|m| m)
 			// remove duplicate elements
@@ -979,35 +977,7 @@ impl BlockChainClient for Client {
 			.into_iter()
 			.collect::<Vec<u64>>();
 
-		blocks.sort();
-
-		let chain = self.chain.read();
-		blocks.into_iter()
-			.filter_map(|number| chain.block_hash(number).map(|hash| (number, hash)))
-			.filter_map(|(number, hash)| chain.block_receipts(&hash).map(|r| (number, hash, r.receipts)))
-			.filter_map(|(number, hash, receipts)| chain.block_body(&hash).map(|ref b| (number, hash, receipts, BodyView::new(b).transaction_hashes())))
-			.flat_map(|(number, hash, receipts, hashes)| {
-				let mut log_index = 0;
-				receipts.into_iter()
-					.enumerate()
-					.flat_map(|(index, receipt)| {
-						log_index += receipt.logs.len();
-						receipt.logs.into_iter()
-							.enumerate()
-							.filter(|tuple| filter.matches(&tuple.1))
-							.map(|(i, log)| LocalizedLogEntry {
-								entry: log,
-								block_hash: hash.clone(),
-								block_number: number,
-								transaction_hash: hashes.get(index).cloned().unwrap_or_else(H256::default),
-								transaction_index: index,
-								log_index: log_index + i
-							})
-							.collect::<Vec<LocalizedLogEntry>>()
-					})
-					.collect::<Vec<LocalizedLogEntry>>()
-			})
-			.collect()
+		self.chain.read().logs(blocks, |entry| filter.matches(entry), limit)
 	}
 
 	fn filter_traces(&self, filter: TraceFilter) -> Option<Vec<LocalizedTrace>> {
diff --git a/ethcore/src/client/test_client.rs b/ethcore/src/client/test_client.rs
index 33a597745..3f66efff8 100644
--- a/ethcore/src/client/test_client.rs
+++ b/ethcore/src/client/test_client.rs
@@ -395,8 +395,8 @@ impl BlockChainClient for TestBlockChainClient {
 		unimplemented!();
 	}
 
-	fn logs(&self, _filter: Filter) -> Vec<LocalizedLogEntry> {
-		unimplemented!();
+	fn logs(&self, _filter: Filter, _limit: Option<usize>) -> Vec<LocalizedLogEntry> {
+		Vec::new()
 	}
 
 	fn last_hashes(&self) -> LastHashes {
diff --git a/ethcore/src/client/traits.rs b/ethcore/src/client/traits.rs
index 271e95785..f262aabbd 100644
--- a/ethcore/src/client/traits.rs
+++ b/ethcore/src/client/traits.rs
@@ -156,7 +156,7 @@ pub trait BlockChainClient : Sync + Send {
 	fn blocks_with_bloom(&self, bloom: &H2048, from_block: BlockID, to_block: BlockID) -> Option<Vec<BlockNumber>>;
 
 	/// Returns logs matching given filter.
-	fn logs(&self, filter: Filter) -> Vec<LocalizedLogEntry>;
+	fn logs(&self, filter: Filter, limit: Option<usize>) -> Vec<LocalizedLogEntry>;
 
 	/// Makes a non-persistent transaction call.
 	fn call(&self, t: &SignedTransaction, block: BlockID, analytics: CallAnalytics) -> Result<Executed, CallError>;
diff --git a/ethcore/src/ethereum/ethash.rs b/ethcore/src/ethereum/ethash.rs
index 4d25f812a..216ebed17 100644
--- a/ethcore/src/ethereum/ethash.rs
+++ b/ethcore/src/ethereum/ethash.rs
@@ -160,7 +160,7 @@ impl Engine for Ethash {
 		let fields = block.fields_mut();
 
 		// Bestow block reward
-		fields.state.add_balance(&fields.header.author(), &(reward + reward / U256::from(32) * U256::from(fields.uncles.len())));
+		fields.state.add_balance(fields.header.author(), &(reward + reward / U256::from(32) * U256::from(fields.uncles.len())));
 
 		// Bestow uncle rewards
 		let current_number = fields.header.number();
diff --git a/ethcore/src/miner/miner.rs b/ethcore/src/miner/miner.rs
index 931246965..83d7d8f8e 100644
--- a/ethcore/src/miner/miner.rs
+++ b/ethcore/src/miner/miner.rs
@@ -251,6 +251,7 @@ impl Miner {
 		self.sealing_work.lock().queue.peek_last_ref().map(|b| b.base().clone())
 	}
 
+	#[cfg_attr(feature="dev", allow(match_same_arms))]
 	/// Prepares new block for sealing including top transactions from queue.
 	fn prepare_block(&self, chain: &MiningBlockChainClient) -> (ClosedBlock, Option<H256>) {
 		{
@@ -374,7 +375,7 @@ impl Miner {
 
 	/// Attempts to perform internal sealing (one that does not require work) to return Ok(sealed),
 	/// Err(Some(block)) returns for unsuccesful sealing while Err(None) indicates misspecified engine.
-	fn seal_block_internally(&self, block: ClosedBlock) -> Result<SealedBlock, Option<ClosedBlock>> { 
+	fn seal_block_internally(&self, block: ClosedBlock) -> Result<SealedBlock, Option<ClosedBlock>> {
 		trace!(target: "miner", "seal_block_internally: block has transaction - attempting internal seal.");
 		let s = self.engine.generate_seal(block.block(), match self.accounts {
 			Some(ref x) => Some(&**x),
@@ -678,6 +679,7 @@ impl MinerService for Miner {
 		results
 	}
 
+	#[cfg_attr(feature="dev", allow(collapsible_if))]
 	fn import_own_transaction(
 		&self,
 		chain: &MiningBlockChainClient,
diff --git a/ethcore/src/miner/transaction_queue.rs b/ethcore/src/miner/transaction_queue.rs
index 4b1e8abec..af054aa98 100644
--- a/ethcore/src/miner/transaction_queue.rs
+++ b/ethcore/src/miner/transaction_queue.rs
@@ -949,7 +949,7 @@ mod test {
 		new_tx_pair(default_nonce(), default_gas_price(), nonce_increment, gas_price_increment)
 	}
 
-	/// Returns two transactions with identical (sender, nonce) but different gas_price/hash.
+	/// Returns two transactions with identical (sender, nonce) but different gas price/hash.
 	fn new_similar_tx_pair() -> (SignedTransaction, SignedTransaction) {
 		new_tx_pair_default(0.into(), 1.into())
 	}
diff --git a/ethcore/src/snapshot/tests/helpers.rs b/ethcore/src/snapshot/tests/helpers.rs
index 34c57df67..42fb68220 100644
--- a/ethcore/src/snapshot/tests/helpers.rs
+++ b/ethcore/src/snapshot/tests/helpers.rs
@@ -45,6 +45,7 @@ impl StateProducer {
 		}
 	}
 
+	#[cfg_attr(feature="dev", allow(let_and_return))]
 	/// Tick the state producer. This alters the state, writing new data into
 	/// the database.
 	pub fn tick<R: Rng>(&mut self, rng: &mut R, db: &mut HashDB) {
diff --git a/ethcore/src/spec/spec.rs b/ethcore/src/spec/spec.rs
index 09ea03ac7..732eda717 100644
--- a/ethcore/src/spec/spec.rs
+++ b/ethcore/src/spec/spec.rs
@@ -184,7 +184,7 @@ impl Spec {
 			let r = Rlp::new(&seal);
 			(0..self.seal_fields).map(|i| r.at(i).as_raw().to_vec()).collect()
 		});
-		return header;
+		header
 	}
 
 	/// Compose the genesis block for this chain.
@@ -285,7 +285,7 @@ mod tests {
 	// https://github.com/ethcore/parity/issues/1840
 	#[test]
 	fn test_load_empty() {
-		assert!(Spec::load(&vec![] as &[u8]).is_err());
+		assert!(Spec::load(&[] as &[u8]).is_err());
 	}
 
 	#[test]
diff --git a/ethcore/src/state/mod.rs b/ethcore/src/state/mod.rs
index 11c617474..38fb10a84 100644
--- a/ethcore/src/state/mod.rs
+++ b/ethcore/src/state/mod.rs
@@ -1314,13 +1314,13 @@ fn storage_at_from_database() {
 	let temp = RandomTempPath::new();
 	let (root, db) = {
 		let mut state = get_temp_state_in(temp.as_path());
-		state.set_storage(&a, H256::from(&U256::from(01u64)), H256::from(&U256::from(69u64)));
+		state.set_storage(&a, H256::from(&U256::from(1u64)), H256::from(&U256::from(69u64)));
 		state.commit().unwrap();
 		state.drop()
 	};
 
 	let s = State::from_existing(db, root, U256::from(0u8), Default::default()).unwrap();
-	assert_eq!(s.storage_at(&a, &H256::from(&U256::from(01u64))), H256::from(&U256::from(69u64)));
+	assert_eq!(s.storage_at(&a, &H256::from(&U256::from(1u64))), H256::from(&U256::from(69u64)));
 }
 
 #[test]
diff --git a/ethcore/src/tests/client.rs b/ethcore/src/tests/client.rs
index ff4e09dc9..b10b56d95 100644
--- a/ethcore/src/tests/client.rs
+++ b/ethcore/src/tests/client.rs
@@ -19,6 +19,7 @@ use client::{BlockChainClient, MiningBlockChainClient, Client, ClientConfig, Blo
 use ethereum;
 use block::IsBlock;
 use tests::helpers::*;
+use types::filter::Filter;
 use common::*;
 use devtools::*;
 use miner::Miner;
@@ -131,6 +132,34 @@ fn returns_chain_info() {
 	assert_eq!(info.best_block_hash, block.header().hash());
 }
 
+#[test]
+fn returns_logs() {
+	let dummy_block = get_good_dummy_block();
+	let client_result = get_test_client_with_blocks(vec![dummy_block.clone()]);
+	let client = client_result.reference();
+	let logs = client.logs(Filter {
+		from_block: BlockID::Earliest,
+		to_block: BlockID::Latest,
+		address: None,
+		topics: vec![],
+	}, None);
+	assert_eq!(logs.len(), 0);
+}
+
+#[test]
+fn returns_logs_with_limit() {
+	let dummy_block = get_good_dummy_block();
+	let client_result = get_test_client_with_blocks(vec![dummy_block.clone()]);
+	let client = client_result.reference();
+	let logs = client.logs(Filter {
+		from_block: BlockID::Earliest,
+		to_block: BlockID::Latest,
+		address: None,
+		topics: vec![],
+	}, Some(2));
+	assert_eq!(logs.len(), 0);
+}
+
 #[test]
 fn returns_block_body() {
 	let dummy_block = get_good_dummy_block();
diff --git a/ethcore/src/verification/verification.rs b/ethcore/src/verification/verification.rs
index db3a9314c..86d3623c2 100644
--- a/ethcore/src/verification/verification.rs
+++ b/ethcore/src/verification/verification.rs
@@ -241,6 +241,7 @@ mod tests {
 	use spec::*;
 	use transaction::*;
 	use tests::helpers::*;
+	use types::log_entry::{LogEntry, LocalizedLogEntry};
 	use rlp::View;
 
 	fn check_ok(result: Result<(), Error>) {
@@ -333,6 +334,12 @@ mod tests {
 		fn block_receipts(&self, _hash: &H256) -> Option<BlockReceipts> {
 			unimplemented!()
 		}
+
+
+		fn logs<F>(&self, _blocks: Vec<BlockNumber>, _matches: F, _limit: Option<usize>) -> Vec<LocalizedLogEntry>
+			where F: Fn(&LogEntry) -> bool, Self: Sized {
+			unimplemented!()
+		}
 	}
 
 	fn basic_test(bytes: &[u8], engine: &Engine) -> Result<(), Error> {
diff --git a/ethcrypto/Cargo.toml b/ethcrypto/Cargo.toml
index 85298266d..5c638b555 100644
--- a/ethcrypto/Cargo.toml
+++ b/ethcrypto/Cargo.toml
@@ -8,5 +8,5 @@ rust-crypto = "0.2.36"
 tiny-keccak = "1.0"
 eth-secp256k1 = { git = "https://github.com/ethcore/rust-secp256k1" }
 ethkey = { path = "../ethkey" }
-bigint = { path = "../util/bigint" }
+ethcore-bigint = { path = "../util/bigint" }
 
diff --git a/ethcrypto/src/lib.rs b/ethcrypto/src/lib.rs
index 9263e32c9..680718d12 100644
--- a/ethcrypto/src/lib.rs
+++ b/ethcrypto/src/lib.rs
@@ -16,7 +16,7 @@
 
 //! Crypto utils used ethstore and network.
 
-extern crate bigint;
+extern crate ethcore_bigint as bigint;
 extern crate tiny_keccak;
 extern crate crypto as rcrypto;
 extern crate secp256k1;
diff --git a/ethkey/Cargo.toml b/ethkey/Cargo.toml
index 6253d5a39..8e95d8519 100644
--- a/ethkey/Cargo.toml
+++ b/ethkey/Cargo.toml
@@ -10,7 +10,7 @@ tiny-keccak = "1.0"
 eth-secp256k1 = { git = "https://github.com/ethcore/rust-secp256k1" }
 rustc-serialize = "0.3"
 docopt = { version = "0.6", optional = true }
-bigint = { path = "../util/bigint" }
+ethcore-bigint = { path = "../util/bigint" }
 
 [features]
 default = []
diff --git a/ethkey/src/lib.rs b/ethkey/src/lib.rs
index 0bce090a5..1f345b2ff 100644
--- a/ethkey/src/lib.rs
+++ b/ethkey/src/lib.rs
@@ -20,7 +20,7 @@ extern crate lazy_static;
 extern crate tiny_keccak;
 extern crate secp256k1;
 extern crate rustc_serialize;
-extern crate bigint;
+extern crate ethcore_bigint as bigint;
 
 mod brain;
 mod error;
diff --git a/json/Cargo.toml b/json/Cargo.toml
index 3c66e1317..90c36cedc 100644
--- a/json/Cargo.toml
+++ b/json/Cargo.toml
@@ -10,7 +10,7 @@ rustc-serialize = "0.3"
 serde = "0.8"
 serde_json = "0.8"
 serde_macros = { version = "0.8", optional = true }
-clippy = { version = "0.0.85", optional = true}
+clippy = { version = "0.0.90", optional = true}
 
 [build-dependencies]
 serde_codegen = { version = "0.8", optional = true }
diff --git a/parity/blockchain.rs b/parity/blockchain.rs
index 1c22a9844..72215ca59 100644
--- a/parity/blockchain.rs
+++ b/parity/blockchain.rs
@@ -17,20 +17,20 @@
 use std::str::{FromStr, from_utf8};
 use std::{io, fs};
 use std::io::{BufReader, BufRead};
-use std::time::Duration;
+use std::time::{Instant, Duration};
 use std::thread::sleep;
 use std::sync::Arc;
 use rustc_serialize::hex::FromHex;
 use ethcore_logger::{setup_log, Config as LogConfig};
 use io::{PanicHandler, ForwardPanic};
-use util::ToPretty;
+use util::{ToPretty, Uint};
 use rlp::PayloadInfo;
 use ethcore::service::ClientService;
 use ethcore::client::{Mode, DatabaseCompactionProfile, Switch, VMType, BlockImportError, BlockChainClient, BlockID};
 use ethcore::error::ImportError;
 use ethcore::miner::Miner;
 use cache::CacheConfig;
-use informant::Informant;
+use informant::{Informant, MillisecondDuration};
 use io_handler::ImportIoHandler;
 use params::{SpecType, Pruning};
 use helpers::{to_client_config, execute_upgrades};
@@ -108,6 +108,8 @@ pub fn execute(cmd: BlockchainCmd) -> Result<String, String> {
 }
 
 fn execute_import(cmd: ImportBlockchain) -> Result<String, String> {
+	let timer = Instant::now();
+
 	// Setup panic handler
 	let panic_handler = PanicHandler::new_in_arc();
 
@@ -218,15 +220,25 @@ fn execute_import(cmd: ImportBlockchain) -> Result<String, String> {
 		}
 	}
 	client.flush_queue();
+	let report = client.report();
 
-	Ok("Import completed.".into())
+	let ms = timer.elapsed().as_milliseconds();
+	Ok(format!("Import completed in {} seconds, {} blocks, {} blk/s, {} transactions, {} tx/s, {} Mgas, {} Mgas/s",
+		ms / 1000,
+		report.blocks_imported,
+		(report.blocks_imported * 1000) as u64 / ms,
+		report.transactions_applied,
+		(report.transactions_applied * 1000) as u64 / ms,
+		report.gas_processed / From::from(1_000_000),
+		(report.gas_processed / From::from(ms * 1000)).low_u64(),
+	).into())
 }
 
 fn execute_export(cmd: ExportBlockchain) -> Result<String, String> {
 	// Setup panic handler
 	let panic_handler = PanicHandler::new_in_arc();
 
-	let format = cmd.format.unwrap_or_else(Default::default);
+	let format = cmd.format.unwrap_or_default();
 
 	// load spec file
 	let spec = try!(cmd.spec.spec());
diff --git a/parity/boot.rs b/parity/boot.rs
index 0b0e6b670..d930085db 100644
--- a/parity/boot.rs
+++ b/parity/boot.rs
@@ -54,12 +54,10 @@ pub fn payload<B: ipc::BinaryConvertable>() -> Result<B, BootError> {
 
 	let mut buffer = Vec::new();
 	try!(
-		io::stdin().read_to_end(&mut buffer)
-			.map_err(|io_err| BootError::ReadArgs(io_err))
+		io::stdin().read_to_end(&mut buffer).map_err(BootError::ReadArgs)
 	);
 
-	ipc::binary::deserialize::<B>(&buffer)
-		.map_err(|binary_error| BootError::DecodeArgs(binary_error))
+	ipc::binary::deserialize::<B>(&buffer).map_err(BootError::DecodeArgs)
 }
 
 pub fn register(hv_url: &str, control_url: &str, module_id: IpcModuleId) -> GuardedSocket<HypervisorServiceClient<NanoSocket>>{
@@ -73,7 +71,7 @@ pub fn register(hv_url: &str, control_url: &str, module_id: IpcModuleId) -> Guar
 pub fn dependency<C: WithSocket<NanoSocket>>(url: &str)
 	-> Result<GuardedSocket<C>, BootError>
 {
-	nanoipc::generic_client::<C>(url).map_err(|socket_err| BootError::DependencyConnect(socket_err))
+	nanoipc::generic_client::<C>(url).map_err(BootError::DependencyConnect)
 }
 
 pub fn main_thread() -> Arc<AtomicBool> {
diff --git a/parity/cli/config.full.toml b/parity/cli/config.full.toml
new file mode 100644
index 000000000..ec5dfbe35
--- /dev/null
+++ b/parity/cli/config.full.toml
@@ -0,0 +1,98 @@
+[parity]
+mode = "active"
+mode_timeout = 300
+mode_alarm = 3600
+chain = "homestead"
+db_path = "$HOME/.parity"
+keys_path = "$HOME/.parity/keys"
+identity = ""
+
+[account]
+unlock = ["0xdeadbeefcafe0000000000000000000000000000"]
+password = ["~/.safe/password.file"]
+keys_iterations = 10240
+
+[signer]
+force = false
+disable = false
+port = 8180
+interface = "127.0.0.1"
+path = "$HOME/.parity/signer"
+
+[network]
+disable = false
+port = 30303
+min_peers = 25
+max_peers = 50
+nat = "any"
+id = "0x1"
+bootnodes = []
+discovery = true
+
+reserved_only = false
+reserved_peers = "./path_to_file"
+
+[rpc]
+disable = false
+port = 8545
+interface = "local"
+cors = "null"
+apis = ["web3", "eth", "net", "personal", "ethcore", "traces", "rpc"]
+hosts = ["none"]
+
+[ipc]
+disable = false
+path = "$HOME/.parity/jsonrpc.ipc"
+apis = ["web3", "eth", "net", "personal", "ethcore", "traces", "rpc"]
+
+[dapps]
+disable = false
+port = 8080
+interface = "local"
+hosts = ["none"]
+path = "$HOME/.parity/dapps"
+# authorization:
+user = "test_user"
+pass = "test_pass"
+
+[mining]
+author = "0xdeadbeefcafe0000000000000000000000000001"
+force_sealing = true
+reseal_on_txs = "all"
+reseal_min_period = 4000
+work_queue_size = 20
+relay_set = "cheap"
+usd_per_tx = "0"
+usd_per_eth = "auto"
+price_update_period = "hourly"
+gas_floor_target = "4700000"
+gas_cap = "6283184"
+tx_queue_size = 1024
+tx_gas_limit = "6283184"
+extra_data = "Parity"
+remove_solved = false
+notify_work = ["http://localhost:3001"]
+
+[footprint]
+tracing = "auto"
+pruning = "auto"
+cache_size_db = 64
+cache_size_blocks = 8
+cache_size_queue = 50
+cache_size = 128 # Overrides above caches with total size
+fast_and_loose = false
+db_compaction = "ssd"
+fat_db = false
+
+[snapshots]
+disable_periodic = false
+
+[vm]
+jit = false
+
+[misc]
+logging = "own_tx=trace"
+log_file = "/var/log/parity.log"
+color = true
+
+
diff --git a/parity/cli/config.invalid1.toml b/parity/cli/config.invalid1.toml
new file mode 100644
index 000000000..b340da102
--- /dev/null
+++ b/parity/cli/config.invalid1.toml
@@ -0,0 +1,2 @@
+[account
+unlock = "0x1"
diff --git a/parity/cli/config.invalid2.toml b/parity/cli/config.invalid2.toml
new file mode 100644
index 000000000..766dcfb59
--- /dev/null
+++ b/parity/cli/config.invalid2.toml
@@ -0,0 +1,4 @@
+[account]
+unlock = "0x1"
+passwd = []
+
diff --git a/parity/cli/config.toml b/parity/cli/config.toml
new file mode 100644
index 000000000..11ec333aa
--- /dev/null
+++ b/parity/cli/config.toml
@@ -0,0 +1,63 @@
+[parity]
+mode = "dark"
+mode_timeout = 15
+mode_alarm = 10
+chain = "./chain.json"
+
+[account]
+unlock = ["0x1", "0x2", "0x3"]
+password = ["passwdfile path"]
+
+[signer]
+disable = true
+
+[network]
+disable = false
+discovery = true
+nat = "any"
+min_peers = 10
+max_peers = 20
+
+reserved_only = true
+reserved_peers = "./path/to/reserved_peers"
+
+
+[rpc]
+disable = true
+port = 8180
+
+[ipc]
+apis = ["rpc", "eth"]
+
+[dapps]
+port = 8080
+user = "username"
+pass = "password"
+
+[mining]
+author = "0xdeadbeefcafe0000000000000000000000000001"
+force_sealing = true
+reseal_on_txs = "all"
+reseal_min_period = 4000
+price_update_period = "hourly"
+tx_queue_size = 2048
+
+[footprint]
+tracing = "on"
+pruning = "fast"
+cache_size_db = 128
+cache_size_blocks = 16
+cache_size_queue = 100
+db_compaction = "ssd"
+fat_db = true
+
+[snapshots]
+disable_periodic = true
+
+[vm]
+jit = false
+
+[misc]
+logging = "own_tx=trace"
+log_file = "/var/log/parity.log"
+color = true
diff --git a/parity/cli/mod.rs b/parity/cli/mod.rs
new file mode 100644
index 000000000..aa7b460db
--- /dev/null
+++ b/parity/cli/mod.rs
@@ -0,0 +1,701 @@
+// 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/>.
+
+#[macro_use]
+mod usage;
+
+usage! {
+	{
+		// Commands
+		cmd_daemon: bool,
+		cmd_wallet: bool,
+		cmd_account: bool,
+		cmd_new: bool,
+		cmd_list: bool,
+		cmd_export: bool,
+		cmd_import: bool,
+		cmd_signer: bool,
+		cmd_new_token: bool,
+		cmd_snapshot: bool,
+		cmd_restore: bool,
+		cmd_ui: bool,
+
+		// Arguments
+		arg_pid_file: String,
+		arg_file: Option<String>,
+		arg_path: Vec<String>,
+
+		// Flags
+		// -- Legacy Options
+		flag_geth: bool,
+		flag_testnet: bool,
+		flag_import_geth_keys: bool,
+		flag_datadir: Option<String>,
+		flag_networkid: Option<String>,
+		flag_peers: Option<u16>,
+		flag_nodekey: Option<String>,
+		flag_nodiscover: bool,
+		flag_jsonrpc: bool,
+		flag_jsonrpc_off: bool,
+		flag_webapp: bool,
+		flag_dapps_off: bool,
+		flag_rpc: bool,
+		flag_rpcaddr: Option<String>,
+		flag_rpcport: Option<u16>,
+		flag_rpcapi: Option<String>,
+		flag_rpccorsdomain: Option<String>,
+		flag_ipcdisable: bool,
+		flag_ipc_off: bool,
+		flag_ipcapi: Option<String>,
+		flag_ipcpath: Option<String>,
+		flag_gasprice: Option<String>,
+		flag_etherbase: Option<String>,
+		flag_extradata: Option<String>,
+		flag_cache: Option<u32>,
+
+		// -- Miscellaneous Options
+		flag_version: bool,
+		flag_no_config: bool,
+	}
+	{
+		// -- Operating Options
+		flag_mode: String = "active", or |c: &Config| otry!(c.parity).mode.clone(),
+		flag_mode_timeout: u64 = 300u64, or |c: &Config| otry!(c.parity).mode_timeout.clone(),
+		flag_mode_alarm: u64 = 3600u64, or |c: &Config| otry!(c.parity).mode_alarm.clone(),
+		flag_chain: String = "homestead", or |c: &Config| otry!(c.parity).chain.clone(),
+		flag_db_path: String = "$HOME/.parity", or |c: &Config| otry!(c.parity).db_path.clone(),
+		flag_keys_path: String = "$HOME/.parity/keys", or |c: &Config| otry!(c.parity).keys_path.clone(),
+		flag_identity: String = "", or |c: &Config| otry!(c.parity).identity.clone(),
+
+		// -- Account Options
+		flag_unlock: Option<String> = None,
+			or |c: &Config| otry!(c.account).unlock.clone().map(|vec| Some(vec.join(","))),
+		flag_password: Vec<String> = Vec::new(),
+			or |c: &Config| otry!(c.account).password.clone(),
+		flag_keys_iterations: u32 = 10240u32,
+			or |c: &Config| otry!(c.account).keys_iterations.clone(),
+
+		flag_force_signer: bool = false,
+			or |c: &Config| otry!(c.signer).force.clone(),
+		flag_no_signer: bool = false,
+			or |c: &Config| otry!(c.signer).disable.clone(),
+		flag_signer_port: u16 = 8180u16,
+			or |c: &Config| otry!(c.signer).port.clone(),
+		flag_signer_interface: String = "local",
+			or |c: &Config| otry!(c.signer).interface.clone(),
+		flag_signer_path: String = "$HOME/.parity/signer",
+			or |c: &Config| otry!(c.signer).path.clone(),
+		// NOTE [todr] For security reasons don't put this to config files
+		flag_signer_no_validation: bool = false, or |_| None,
+
+		// -- Networking Options
+		flag_no_network: bool = false,
+			or |c: &Config| otry!(c.network).disable.clone(),
+		flag_port: u16 = 30303u16,
+			or |c: &Config| otry!(c.network).port.clone(),
+		flag_min_peers: u16 = 25u16,
+			or |c: &Config| otry!(c.network).min_peers.clone(),
+		flag_max_peers: u16 = 50u16,
+			or |c: &Config| otry!(c.network).max_peers.clone(),
+		flag_nat: String = "any",
+			or |c: &Config| otry!(c.network).nat.clone(),
+		flag_network_id: Option<String> = None,
+			or |c: &Config| otry!(c.network).id.clone().map(Some),
+		flag_bootnodes: Option<String> = None,
+			or |c: &Config| otry!(c.network).bootnodes.clone().map(|vec| Some(vec.join(","))),
+		flag_no_discovery: bool = false,
+			or |c: &Config| otry!(c.network).discovery.map(|d| !d).clone(),
+		flag_node_key: Option<String> = None,
+			or |c: &Config| otry!(c.network).node_key.clone().map(Some),
+		flag_reserved_peers: Option<String> = None,
+			or |c: &Config| otry!(c.network).reserved_peers.clone().map(Some),
+		flag_reserved_only: bool = false,
+			or |c: &Config| otry!(c.network).reserved_only.clone(),
+
+		// -- API and Console Options
+		// RPC
+		flag_no_jsonrpc: bool = false,
+			or |c: &Config| otry!(c.rpc).disable.clone(),
+		flag_jsonrpc_port: u16 = 8545u16,
+			or |c: &Config| otry!(c.rpc).port.clone(),
+		flag_jsonrpc_interface: String  = "local",
+			or |c: &Config| otry!(c.rpc).interface.clone(),
+		flag_jsonrpc_cors: Option<String> = None,
+			or |c: &Config| otry!(c.rpc).cors.clone().map(Some),
+		flag_jsonrpc_apis: String = "web3,eth,net,ethcore,personal,traces,rpc",
+			or |c: &Config| otry!(c.rpc).apis.clone().map(|vec| vec.join(",")),
+		flag_jsonrpc_hosts: String = "none",
+			or |c: &Config| otry!(c.rpc).hosts.clone().map(|vec| vec.join(",")),
+
+		// IPC
+		flag_no_ipc: bool = false,
+			or |c: &Config| otry!(c.ipc).disable.clone(),
+		flag_ipc_path: String = "$HOME/.parity/jsonrpc.ipc",
+			or |c: &Config| otry!(c.ipc).path.clone(),
+		flag_ipc_apis: String = "web3,eth,net,ethcore,personal,traces,rpc",
+			or |c: &Config| otry!(c.ipc).apis.clone().map(|vec| vec.join(",")),
+
+		// DAPPS
+		flag_no_dapps: bool = false,
+			or |c: &Config| otry!(c.dapps).disable.clone(),
+		flag_dapps_port: u16 = 8080u16,
+			or |c: &Config| otry!(c.dapps).port.clone(),
+		flag_dapps_interface: String = "local",
+			or |c: &Config| otry!(c.dapps).interface.clone(),
+		flag_dapps_hosts: String = "none",
+			or |c: &Config| otry!(c.dapps).hosts.clone().map(|vec| vec.join(",")),
+		flag_dapps_path: String = "$HOME/.parity/dapps",
+			or |c: &Config| otry!(c.dapps).path.clone(),
+		flag_dapps_user: Option<String> = None,
+			or |c: &Config| otry!(c.dapps).user.clone().map(Some),
+		flag_dapps_pass: Option<String> = None,
+			or |c: &Config| otry!(c.dapps).pass.clone().map(Some),
+
+		// -- Sealing/Mining Options
+		flag_author: Option<String> = None,
+			or |c: &Config| otry!(c.mining).author.clone().map(Some),
+		flag_force_sealing: bool = false,
+			or |c: &Config| otry!(c.mining).force_sealing.clone(),
+		flag_reseal_on_txs: String = "own",
+			or |c: &Config| otry!(c.mining).reseal_on_txs.clone(),
+		flag_reseal_min_period: u64 = 2000u64,
+			or |c: &Config| otry!(c.mining).reseal_min_period.clone(),
+		flag_work_queue_size: usize = 20usize,
+			or |c: &Config| otry!(c.mining).work_queue_size.clone(),
+		flag_tx_gas_limit: Option<String> = None,
+			or |c: &Config| otry!(c.mining).tx_gas_limit.clone().map(Some),
+		flag_relay_set: String = "cheap",
+			or |c: &Config| otry!(c.mining).relay_set.clone(),
+		flag_usd_per_tx: String = "0",
+			or |c: &Config| otry!(c.mining).usd_per_tx.clone(),
+		flag_usd_per_eth: String = "auto",
+			or |c: &Config| otry!(c.mining).usd_per_eth.clone(),
+		flag_price_update_period: String = "hourly",
+			or |c: &Config| otry!(c.mining).price_update_period.clone(),
+		flag_gas_floor_target: String = "4700000",
+			or |c: &Config| otry!(c.mining).gas_floor_target.clone(),
+		flag_gas_cap: String = "6283184",
+			or |c: &Config| otry!(c.mining).gas_cap.clone(),
+		flag_extra_data: Option<String> = None,
+			or |c: &Config| otry!(c.mining).extra_data.clone().map(Some),
+		flag_tx_queue_size: usize = 1024usize,
+			or |c: &Config| otry!(c.mining).tx_queue_size.clone(),
+		flag_remove_solved: bool = false,
+			or |c: &Config| otry!(c.mining).remove_solved.clone(),
+		flag_notify_work: Option<String> = None,
+			or |c: &Config| otry!(c.mining).notify_work.clone().map(|vec| Some(vec.join(","))),
+
+		// -- Footprint Options
+		flag_tracing: String = "auto",
+			or |c: &Config| otry!(c.footprint).tracing.clone(),
+		flag_pruning: String = "auto",
+			or |c: &Config| otry!(c.footprint).pruning.clone(),
+		flag_cache_size_db: u32 = 64u32,
+			or |c: &Config| otry!(c.footprint).cache_size_db.clone(),
+		flag_cache_size_blocks: u32 = 8u32,
+			or |c: &Config| otry!(c.footprint).cache_size_blocks.clone(),
+		flag_cache_size_queue: u32 = 50u32,
+			or |c: &Config| otry!(c.footprint).cache_size_queue.clone(),
+		flag_cache_size: Option<u32> = None,
+			or |c: &Config| otry!(c.footprint).cache_size.clone().map(Some),
+		flag_fast_and_loose: bool = false,
+			or |c: &Config| otry!(c.footprint).fast_and_loose.clone(),
+		flag_db_compaction: String = "ssd",
+			or |c: &Config| otry!(c.footprint).db_compaction.clone(),
+		flag_fat_db: bool = false,
+			or |c: &Config| otry!(c.footprint).fat_db.clone(),
+
+		// -- Import/Export Options
+		flag_from: String = "1", or |_| None,
+		flag_to: String = "latest", or |_| None,
+		flag_format: Option<String> = None, or |_| None,
+
+		// -- Snapshot Optons
+		flag_at: String = "latest", or |_| None,
+		flag_no_periodic_snapshot: bool = false,
+			or |c: &Config| otry!(c.snapshots).disable_periodic.clone(),
+
+		// -- Virtual Machine Options
+		flag_jitvm: bool = false,
+			or |c: &Config| otry!(c.vm).jit.clone(),
+
+		// -- Miscellaneous Options
+		flag_config: String = "$HOME/.parity/config.toml", or |_| None,
+		flag_logging: Option<String> = None,
+			or |c: &Config| otry!(c.misc).logging.clone().map(Some),
+		flag_log_file: Option<String> = None,
+			or |c: &Config| otry!(c.misc).log_file.clone().map(Some),
+		flag_no_color: bool = false,
+			or |c: &Config| otry!(c.misc).color.map(|c| !c).clone(),
+	}
+}
+
+
+#[derive(Default, Debug, PartialEq, RustcDecodable)]
+struct Config {
+	parity: Option<Operating>,
+	account: Option<Account>,
+	signer: Option<Signer>,
+	network: Option<Network>,
+	rpc: Option<Rpc>,
+	ipc: Option<Ipc>,
+	dapps: Option<Dapps>,
+	mining: Option<Mining>,
+	footprint: Option<Footprint>,
+	snapshots: Option<Snapshots>,
+	vm: Option<VM>,
+	misc: Option<Misc>,
+}
+
+#[derive(Default, Debug, PartialEq, RustcDecodable)]
+struct Operating {
+	mode: Option<String>,
+	mode_timeout: Option<u64>,
+	mode_alarm: Option<u64>,
+	chain: Option<String>,
+	db_path: Option<String>,
+	keys_path: Option<String>,
+	identity: Option<String>,
+}
+
+#[derive(Default, Debug, PartialEq, RustcDecodable)]
+struct Account {
+	unlock: Option<Vec<String>>,
+	password: Option<Vec<String>>,
+	keys_iterations: Option<u32>,
+}
+
+#[derive(Default, Debug, PartialEq, RustcDecodable)]
+struct Signer {
+	force: Option<bool>,
+	disable: Option<bool>,
+	port: Option<u16>,
+	interface: Option<String>,
+	path: Option<String>,
+}
+
+#[derive(Default, Debug, PartialEq, RustcDecodable)]
+struct Network {
+	disable: Option<bool>,
+	port: Option<u16>,
+	min_peers: Option<u16>,
+	max_peers: Option<u16>,
+	nat: Option<String>,
+	id: Option<String>,
+	bootnodes: Option<Vec<String>>,
+	discovery: Option<bool>,
+	node_key: Option<String>,
+	reserved_peers: Option<String>,
+	reserved_only: Option<bool>,
+}
+
+#[derive(Default, Debug, PartialEq, RustcDecodable)]
+struct Rpc {
+	disable: Option<bool>,
+	port: Option<u16>,
+	interface: Option<String>,
+	cors: Option<String>,
+	apis: Option<Vec<String>>,
+	hosts: Option<Vec<String>>,
+}
+
+#[derive(Default, Debug, PartialEq, RustcDecodable)]
+struct Ipc {
+	disable: Option<bool>,
+	path: Option<String>,
+	apis: Option<Vec<String>>,
+}
+
+#[derive(Default, Debug, PartialEq, RustcDecodable)]
+struct Dapps {
+	disable: Option<bool>,
+	port: Option<u16>,
+	interface: Option<String>,
+	hosts: Option<Vec<String>>,
+	path: Option<String>,
+	user: Option<String>,
+	pass: Option<String>,
+}
+
+#[derive(Default, Debug, PartialEq, RustcDecodable)]
+struct Mining {
+	author: Option<String>,
+	force_sealing: Option<bool>,
+	reseal_on_txs: Option<String>,
+	reseal_min_period: Option<u64>,
+	work_queue_size: Option<usize>,
+	tx_gas_limit: Option<String>,
+	relay_set: Option<String>,
+	usd_per_tx: Option<String>,
+	usd_per_eth: Option<String>,
+	price_update_period: Option<String>,
+	gas_floor_target: Option<String>,
+	gas_cap: Option<String>,
+	extra_data: Option<String>,
+	tx_queue_size: Option<usize>,
+	remove_solved: Option<bool>,
+	notify_work: Option<Vec<String>>,
+}
+
+#[derive(Default, Debug, PartialEq, RustcDecodable)]
+struct Footprint {
+	tracing: Option<String>,
+	pruning: Option<String>,
+	fast_and_loose: Option<bool>,
+	cache_size: Option<u32>,
+	cache_size_db: Option<u32>,
+	cache_size_blocks: Option<u32>,
+	cache_size_queue: Option<u32>,
+	db_compaction: Option<String>,
+	fat_db: Option<bool>,
+}
+
+#[derive(Default, Debug, PartialEq, RustcDecodable)]
+struct Snapshots {
+	disable_periodic: Option<bool>,
+}
+
+#[derive(Default, Debug, PartialEq, RustcDecodable)]
+struct VM {
+	jit: Option<bool>,
+}
+
+#[derive(Default, Debug, PartialEq, RustcDecodable)]
+struct Misc {
+	logging: Option<String>,
+	log_file: Option<String>,
+	color: Option<bool>,
+}
+
+#[cfg(test)]
+mod tests {
+	use super::{
+		Args, ArgsError,
+		Config, Operating, Account, Signer, Network, Rpc, Ipc, Dapps, Mining, Footprint, Snapshots, VM, Misc
+	};
+	use toml;
+
+	#[test]
+	fn should_parse_args_and_include_config() {
+		// given
+		let mut config = Config::default();
+		let mut operating = Operating::default();
+		operating.chain = Some("morden".into());
+		config.parity = Some(operating);
+
+		// when
+		let args = Args::parse_with_config(&["parity"], config).unwrap();
+
+		// then
+		assert_eq!(args.flag_chain, "morden".to_owned());
+	}
+
+	#[test]
+	fn should_not_use_config_if_cli_is_provided() {
+		// given
+		let mut config = Config::default();
+		let mut operating = Operating::default();
+		operating.chain = Some("morden".into());
+		config.parity = Some(operating);
+
+		// when
+		let args = Args::parse_with_config(&["parity", "--chain", "xyz"], config).unwrap();
+
+		// then
+		assert_eq!(args.flag_chain, "xyz".to_owned());
+	}
+
+	#[test]
+	fn should_parse_full_config() {
+		// given
+		let config = toml::decode_str(include_str!("./config.full.toml")).unwrap();
+
+		// when
+		let args = Args::parse_with_config(&["parity", "--chain", "xyz"], config).unwrap();
+
+		// then
+		assert_eq!(args, Args {
+			// Commands
+			cmd_daemon: false,
+			cmd_wallet: false,
+			cmd_account: false,
+			cmd_new: false,
+			cmd_list: false,
+			cmd_export: false,
+			cmd_import: false,
+			cmd_signer: false,
+			cmd_new_token: false,
+			cmd_snapshot: false,
+			cmd_restore: false,
+			cmd_ui: false,
+
+			// Arguments
+			arg_pid_file: "".into(),
+			arg_file: None,
+			arg_path: vec![],
+
+			// -- Operating Options
+			flag_mode: "active".into(),
+			flag_mode_timeout: 300u64,
+			flag_mode_alarm: 3600u64,
+			flag_chain: "xyz".into(),
+			flag_db_path: "$HOME/.parity".into(),
+			flag_keys_path: "$HOME/.parity/keys".into(),
+			flag_identity: "".into(),
+
+			// -- Account Options
+			flag_unlock: Some("0xdeadbeefcafe0000000000000000000000000000".into()),
+			flag_password: vec!["~/.safe/password.file".into()],
+			flag_keys_iterations: 10240u32,
+
+			flag_force_signer: false,
+			flag_no_signer: false,
+			flag_signer_port: 8180u16,
+			flag_signer_interface: "127.0.0.1".into(),
+			flag_signer_path: "$HOME/.parity/signer".into(),
+			flag_signer_no_validation: false,
+
+			// -- Networking Options
+			flag_no_network: false,
+			flag_port: 30303u16,
+			flag_min_peers: 25u16,
+			flag_max_peers: 50u16,
+			flag_nat: "any".into(),
+			flag_network_id: Some("0x1".into()),
+			flag_bootnodes: Some("".into()),
+			flag_no_discovery: false,
+			flag_node_key: None,
+			flag_reserved_peers: Some("./path_to_file".into()),
+			flag_reserved_only: false,
+
+			// -- API and Console Options
+			// RPC
+			flag_no_jsonrpc: false,
+			flag_jsonrpc_port: 8545u16,
+			flag_jsonrpc_interface: "local".into(),
+			flag_jsonrpc_cors: Some("null".into()),
+			flag_jsonrpc_apis: "web3,eth,net,personal,ethcore,traces,rpc".into(),
+			flag_jsonrpc_hosts: "none".into(),
+
+			// IPC
+			flag_no_ipc: false,
+			flag_ipc_path: "$HOME/.parity/jsonrpc.ipc".into(),
+			flag_ipc_apis: "web3,eth,net,personal,ethcore,traces,rpc".into(),
+
+			// DAPPS
+			flag_no_dapps: false,
+			flag_dapps_port: 8080u16,
+			flag_dapps_interface: "local".into(),
+			flag_dapps_hosts: "none".into(),
+			flag_dapps_path: "$HOME/.parity/dapps".into(),
+			flag_dapps_user: Some("test_user".into()),
+			flag_dapps_pass: Some("test_pass".into()),
+
+			// -- Sealing/Mining Options
+			flag_author: Some("0xdeadbeefcafe0000000000000000000000000001".into()),
+			flag_force_sealing: true,
+			flag_reseal_on_txs: "all".into(),
+			flag_reseal_min_period: 4000u64,
+			flag_work_queue_size: 20usize,
+			flag_tx_gas_limit: Some("6283184".into()),
+			flag_relay_set: "cheap".into(),
+			flag_usd_per_tx: "0".into(),
+			flag_usd_per_eth: "auto".into(),
+			flag_price_update_period: "hourly".into(),
+			flag_gas_floor_target: "4700000".into(),
+			flag_gas_cap: "6283184".into(),
+			flag_extra_data: Some("Parity".into()),
+			flag_tx_queue_size: 1024usize,
+			flag_remove_solved: false,
+			flag_notify_work: Some("http://localhost:3001".into()),
+
+			// -- Footprint Options
+			flag_tracing: "auto".into(),
+			flag_pruning: "auto".into(),
+			flag_cache_size_db: 64u32,
+			flag_cache_size_blocks: 8u32,
+			flag_cache_size_queue: 50u32,
+			flag_cache_size: Some(128),
+			flag_fast_and_loose: false,
+			flag_db_compaction: "ssd".into(),
+			flag_fat_db: false,
+
+			// -- Import/Export Options
+			flag_from: "1".into(),
+			flag_to: "latest".into(),
+			flag_format: None,
+
+			// -- Snapshot Optons
+			flag_at: "latest".into(),
+			flag_no_periodic_snapshot: false,
+
+			// -- Virtual Machine Options
+			flag_jitvm: false,
+
+			// -- Legacy Options
+			flag_geth: false,
+			flag_testnet: false,
+			flag_import_geth_keys: false,
+			flag_datadir: None,
+			flag_networkid: None,
+			flag_peers: None,
+			flag_nodekey: None,
+			flag_nodiscover: false,
+			flag_jsonrpc: false,
+			flag_jsonrpc_off: false,
+			flag_webapp: false,
+			flag_dapps_off: false,
+			flag_rpc: false,
+			flag_rpcaddr: None,
+			flag_rpcport: None,
+			flag_rpcapi: None,
+			flag_rpccorsdomain: None,
+			flag_ipcdisable: false,
+			flag_ipc_off: false,
+			flag_ipcapi: None,
+			flag_ipcpath: None,
+			flag_gasprice: None,
+			flag_etherbase: None,
+			flag_extradata: None,
+			flag_cache: None,
+
+			// -- Miscellaneous Options
+			flag_version: false,
+			flag_config: "$HOME/.parity/config.toml".into(),
+			flag_logging: Some("own_tx=trace".into()),
+			flag_log_file: Some("/var/log/parity.log".into()),
+			flag_no_color: false,
+			flag_no_config: false,
+		});
+	}
+
+	#[test]
+	fn should_parse_config_and_return_errors() {
+		let config1 = Args::parse_config(include_str!("./config.invalid1.toml"));
+		let config2 = Args::parse_config(include_str!("./config.invalid2.toml"));
+
+		match (config1, config2) {
+			(Err(ArgsError::Parsing(_)), Err(ArgsError::Decode(_))) => {},
+			(a, b) => {
+				assert!(false, "Got invalid error types: {:?}, {:?}", a, b);
+			}
+		}
+	}
+
+	#[test]
+	fn should_deserialize_toml_file() {
+		let config: Config = toml::decode_str(include_str!("./config.toml")).unwrap();
+
+		assert_eq!(config, Config {
+			parity: Some(Operating {
+				mode: Some("dark".into()),
+				mode_timeout: Some(15u64),
+				mode_alarm: Some(10u64),
+				chain: Some("./chain.json".into()),
+				db_path: None,
+				keys_path: None,
+				identity: None,
+			}),
+			account: Some(Account {
+				unlock: Some(vec!["0x1".into(), "0x2".into(), "0x3".into()]),
+				password: Some(vec!["passwdfile path".into()]),
+				keys_iterations: None,
+			}),
+			signer: Some(Signer {
+				force: None,
+				disable: Some(true),
+				port: None,
+				interface: None,
+				path: None,
+			}),
+			network: Some(Network {
+				disable: Some(false),
+				port: None,
+				min_peers: Some(10),
+				max_peers: Some(20),
+				nat: Some("any".into()),
+				id: None,
+				bootnodes: None,
+				discovery: Some(true),
+				node_key: None,
+				reserved_peers: Some("./path/to/reserved_peers".into()),
+				reserved_only: Some(true),
+			}),
+			rpc: Some(Rpc {
+				disable: Some(true),
+				port: Some(8180),
+				interface: None,
+				cors: None,
+				apis: None,
+				hosts: None,
+			}),
+			ipc: Some(Ipc {
+				disable: None,
+				path: None,
+				apis: Some(vec!["rpc".into(), "eth".into()]),
+			}),
+			dapps: Some(Dapps {
+				disable: None,
+				port: Some(8080),
+				path: None,
+				interface: None,
+				hosts: None,
+				user: Some("username".into()),
+				pass: Some("password".into())
+			}),
+			mining: Some(Mining {
+				author: Some("0xdeadbeefcafe0000000000000000000000000001".into()),
+				force_sealing: Some(true),
+				reseal_on_txs: Some("all".into()),
+				reseal_min_period: Some(4000),
+				work_queue_size: None,
+				relay_set: None,
+				usd_per_tx: None,
+				usd_per_eth: None,
+				price_update_period: Some("hourly".into()),
+				gas_floor_target: None,
+				gas_cap: None,
+				tx_queue_size: Some(2048),
+				tx_gas_limit: None,
+				extra_data: None,
+				remove_solved: None,
+				notify_work: None,
+			}),
+			footprint: Some(Footprint {
+				tracing: Some("on".into()),
+				pruning: Some("fast".into()),
+				fast_and_loose: None,
+				cache_size: None,
+				cache_size_db: Some(128),
+				cache_size_blocks: Some(16),
+				cache_size_queue: Some(100),
+				db_compaction: Some("ssd".into()),
+				fat_db: Some(true),
+			}),
+			snapshots: Some(Snapshots {
+				disable_periodic: Some(true),
+			}),
+			vm: Some(VM {
+				jit: Some(false),
+			}),
+			misc: Some(Misc {
+				logging: Some("own_tx=trace".into()),
+				log_file: Some("/var/log/parity.log".into()),
+				color: Some(true),
+			})
+		});
+	}
+}
diff --git a/parity/cli/usage.rs b/parity/cli/usage.rs
new file mode 100644
index 000000000..da406d36a
--- /dev/null
+++ b/parity/cli/usage.rs
@@ -0,0 +1,213 @@
+// 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/>.
+
+macro_rules! otry {
+	($e: expr) => (
+		match $e {
+			Some(ref v) => v,
+			None => {
+				return None;
+			}
+		}
+	)
+}
+macro_rules! usage {
+	(
+		{
+			$(
+				$field_a:ident : $typ_a:ty,
+			)*
+		}
+		{
+			$(
+				$field:ident : $typ:ty = $default:expr, or $from_config:expr,
+			)*
+		}
+	) => {
+		use toml;
+		use std::{fs, io, process};
+		use std::io::Read;
+		use util::version;
+		use docopt::{Docopt, Error as DocoptError};
+		use helpers::replace_home;
+		use rustc_serialize;
+
+		#[derive(Debug)]
+		pub enum ArgsError {
+			Docopt(DocoptError),
+			Parsing(Vec<toml::ParserError>),
+			Decode(toml::DecodeError),
+			Config(String, io::Error),
+		}
+
+		impl ArgsError {
+			pub fn exit(self) -> ! {
+				match self {
+					ArgsError::Docopt(e) => e.exit(),
+					ArgsError::Parsing(errors) => {
+						println!("There is an error in config file.");
+						for e in &errors {
+							println!("{}", e);
+						}
+						process::exit(2)
+					},
+					ArgsError::Decode(e) => {
+						println!("You might have supplied invalid parameters in config file.");
+						println!("{}", e);
+						process::exit(2)
+					},
+					ArgsError::Config(path, e) => {
+						println!("There was an error reading your config file at: {}", path);
+						println!("{}", e);
+						process::exit(2)
+					}
+				}
+			}
+		}
+
+		impl From<DocoptError> for ArgsError {
+			fn from(e: DocoptError) -> Self { ArgsError::Docopt(e) }
+		}
+
+		impl From<toml::DecodeError> for ArgsError {
+			fn from(e: toml::DecodeError) -> Self { ArgsError::Decode(e) }
+		}
+
+		#[derive(Debug, PartialEq)]
+		pub struct Args {
+			$(
+				pub $field_a: $typ_a,
+			)*
+
+			$(
+				pub $field: $typ,
+			)*
+		}
+
+		impl Default for Args {
+			fn default() -> Self {
+				Args {
+					$(
+						$field_a: Default::default(),
+					)*
+
+					$(
+						$field: $default.into(),
+					)*
+				}
+			}
+		}
+
+		#[derive(Default, Debug, PartialEq, Clone, RustcDecodable)]
+		struct RawArgs {
+			$(
+				$field_a: $typ_a,
+			)*
+			$(
+				$field: Option<$typ>,
+			)*
+		}
+
+		impl Args {
+
+			pub fn parse<S: AsRef<str>>(command: &[S]) -> Result<Self, ArgsError> {
+				let raw_args = try!(RawArgs::parse(command));
+
+				// Skip loading config file if no_config flag is specified
+				if raw_args.flag_no_config {
+					return Ok(raw_args.into_args(Config::default()));
+				}
+
+				let config_file = raw_args.flag_config.clone().unwrap_or_else(|| raw_args.clone().into_args(Config::default()).flag_config);
+				let config_file = replace_home(&config_file);
+				let config = match (fs::File::open(&config_file), raw_args.flag_config.is_some()) {
+					// Load config file
+					(Ok(mut file), _) => {
+						println!("Loading config file from {}", &config_file);
+						let mut config = String::new();
+						try!(file.read_to_string(&mut config).map_err(|e| ArgsError::Config(config_file, e)));
+						try!(Self::parse_config(&config))
+					},
+					// Don't display error in case default config cannot be loaded.
+					(Err(_), false) => Config::default(),
+					// Config set from CLI (fail with error)
+					(Err(e), true) => {
+						return Err(ArgsError::Config(config_file, e));
+					},
+				};
+
+				Ok(raw_args.into_args(config))
+			}
+
+			#[cfg(test)]
+			pub fn parse_without_config<S: AsRef<str>>(command: &[S]) -> Result<Self, ArgsError> {
+				Self::parse_with_config(command, Config::default())
+			}
+
+			#[cfg(test)]
+			fn parse_with_config<S: AsRef<str>>(command: &[S], config: Config) -> Result<Self, ArgsError> {
+				Ok(try!(RawArgs::parse(command)).into_args(config))
+			}
+
+			fn parse_config(config: &str) -> Result<Config, ArgsError> {
+				let mut value_parser = toml::Parser::new(&config);
+				match value_parser.parse() {
+					Some(value) => {
+						let result = rustc_serialize::Decodable::decode(&mut toml::Decoder::new(toml::Value::Table(value)));
+						match result {
+							Ok(config) => Ok(config),
+							Err(e) => Err(e.into()),
+						}
+					},
+					None => Err(ArgsError::Parsing(value_parser.errors)),
+				}
+			}
+
+			pub fn print_version() -> String {
+				format!(include_str!("./version.txt"), version())
+			}
+		}
+
+		impl RawArgs {
+			fn into_args(self, config: Config) -> Args {
+				let mut args = Args::default();
+				$(
+					args.$field_a = self.$field_a;
+				)*
+				$(
+					args.$field = self.$field.or_else(|| $from_config(&config)).unwrap_or_else(|| $default.into());
+				)*
+				args
+			}
+
+			pub fn parse<S: AsRef<str>>(command: &[S]) -> Result<Self, DocoptError> {
+				Docopt::new(Self::usage()).and_then(|d| d.argv(command).decode())
+			}
+
+			fn usage() -> String {
+				format!(
+					include_str!("./usage.txt"),
+					$(
+						$field={ let v: $typ = $default.into(); v },
+						// Uncomment this to debug
+						// "named argument never used" error
+						// $field = $default,
+					)*
+				)
+			}
+		}
+	};
+}
diff --git a/parity/cli.rs b/parity/cli/usage.txt
similarity index 59%
rename from parity/cli.rs
rename to parity/cli/usage.txt
index a234d9d7d..1749cd4b7 100644
--- a/parity/cli.rs
+++ b/parity/cli/usage.txt
@@ -1,23 +1,3 @@
-// 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::version;
-use docopt::Docopt;
-
-pub const USAGE: &'static str = r#"
 Parity. Ethereum Client.
   By Wood/Paronyan/Kotewicz/Drwięga/Volf et al.
   Copyright 2015, 2016 Ethcore (UK) Limited
@@ -41,134 +21,140 @@ Operating Options:
                            passive - Parity syncs initially, then sleeps and
                            wakes regularly to resync.
                            dark - Parity syncs only when an external interface
-                           is active. [default: active].
+                           is active. (default: {flag_mode}).
   --mode-timeout SECS      Specify the number of seconds before inactivity
                            timeout occurs when mode is dark or passive
-                           [default: 300].
+                           (default: {flag_mode_timeout}).
   --mode-alarm SECS        Specify the number of seconds before auto sleep
                            reawake timeout occurs when mode is passive
-                           [default: 3600].
+                           (default: {flag_mode_alarm}).
   --chain CHAIN            Specify the blockchain type. CHAIN may be either a
                            JSON chain specification file or olympic, frontier,
                            homestead, mainnet, morden, classic or testnet
-                           [default: homestead].
+                           (default: {flag_chain}).
   -d --db-path PATH        Specify the database & configuration directory path
-                           [default: $HOME/.parity].
+                           (default: {flag_db_path}).
   --keys-path PATH         Specify the path for JSON key files to be found
-                           [default: $HOME/.parity/keys].
-  --identity NAME          Specify your node's name.
+                           (default: {flag_keys_path}).
+  --identity NAME          Specify your node's name. (default: {flag_identity})
 
 Account Options:
   --unlock ACCOUNTS        Unlock ACCOUNTS for the duration of the execution.
                            ACCOUNTS is a comma-delimited list of addresses.
-                           Implies --no-signer.
+                           Implies --no-signer. (default: {flag_unlock:?})
   --password FILE          Provide a file containing a password for unlocking
-                           an account.
+                           an account. (default: {flag_password:?})
   --keys-iterations NUM    Specify the number of iterations to use when
                            deriving key from the password (bigger is more
-                           secure) [default: 10240].
+                           secure) (default: {flag_keys_iterations}).
   --force-signer           Enable Trusted Signer WebSocket endpoint used by
                            Signer UIs, even when --unlock is in use.
+                           (default: ${flag_force_signer})
   --no-signer              Disable Trusted Signer WebSocket endpoint used by
-                           Signer UIs.
+                           Signer UIs. (default: ${flag_no_signer})
   --signer-port PORT       Specify the port of Trusted Signer server
-                           [default: 8180].
+                           (default: {flag_signer_port}).
   --signer-interface IP    Specify the hostname portion of the Trusted Signer
                            server, IP should be an interface's IP address,
-                           or local [default: local].
+                           or local (default: {flag_signer_interface}).
   --signer-path PATH       Specify directory where Signer UIs tokens should
-                           be stored. [default: $HOME/.parity/signer]
+                           be stored. (default: {flag_signer_path})
   --signer-no-validation   Disable Origin and Host headers validation for
                            Trusted Signer. WARNING: INSECURE. Used only for
-                           development.
+                           development. (default: {flag_signer_no_validation})
 
 Networking Options:
-  --no-network             Disable p2p networking.
+  --no-network             Disable p2p networking. (default: {flag_no_network})
   --port PORT              Override the port on which the node should listen
-                           [default: 30303].
-  --min-peers NUM          Try to maintain at least NUM peers [default: 25].
-  --max-peers NUM          Allow up to that many peers [default: 50].
+                           (default: {flag_port}).
+  --min-peers NUM          Try to maintain at least NUM peers (default: {flag_min_peers}).
+  --max-peers NUM          Allow up to that many peers (default: {flag_max_peers}).
   --nat METHOD             Specify method to use for determining public
                            address. Must be one of: any, none, upnp,
-                           extip:<IP> [default: any].
+                           extip:<IP> (default: {flag_nat}).
   --network-id INDEX       Override the network identifier from the chain we
-                           are on.
+                           are on. (default: {flag_network_id:?})
   --bootnodes NODES        Override the bootnodes from our chain. NODES should
-                           be comma-delimited enodes.
-  --no-discovery           Disable new peer discovery.
+                           be comma-delimited enodes. (default: {flag_bootnodes:?})
+  --no-discovery           Disable new peer discovery. (default: {flag_no_discovery})
   --node-key KEY           Specify node secret key, either as 64-character hex
-                           string or input to SHA3 operation.
+                           string or input to SHA3 operation. (default: {flag_node_key:?})
   --reserved-peers FILE    Provide a file containing enodes, one per line.
                            These nodes will always have a reserved slot on top
-                           of the normal maximum peers.
-  --reserved-only          Connect only to reserved nodes.
+                           of the normal maximum peers. (default: {flag_reserved_peers:?})
+  --reserved-only          Connect only to reserved nodes. (default: {flag_reserved_only})
 
 API and Console Options:
-  --no-jsonrpc             Disable the JSON-RPC API server.
+  --no-jsonrpc             Disable the JSON-RPC API server. (default: {flag_no_jsonrpc})
   --jsonrpc-port PORT      Specify the port portion of the JSONRPC API server
-                           [default: 8545].
+                           (default: {flag_jsonrpc_port}).
   --jsonrpc-interface IP   Specify the hostname portion of the JSONRPC API
                            server, IP should be an interface's IP address, or
-                           all (all interfaces) or local [default: local].
+                           all (all interfaces) or local (default: {flag_jsonrpc_interface}).
   --jsonrpc-cors URL       Specify CORS header for JSON-RPC API responses.
+                           (default: {flag_jsonrpc_cors:?})
   --jsonrpc-apis APIS      Specify the APIs available through the JSONRPC
                            interface. APIS is a comma-delimited list of API
                            name. Possible name are web3, eth, net, personal,
                            ethcore, ethcore_set, traces, rpc.
-                           [default: web3,eth,net,ethcore,personal,traces,rpc].
+                           (default: {flag_jsonrpc_apis}).
   --jsonrpc-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].
+                           (default: {flag_jsonrpc_hosts}).
 
-  --no-ipc                 Disable JSON-RPC over IPC service.
+  --no-ipc                 Disable JSON-RPC over IPC service. (default: {flag_no_ipc})
   --ipc-path PATH          Specify custom path for JSON-RPC over IPC service
-                           [default: $HOME/.parity/jsonrpc.ipc].
+                           (default: {flag_ipc_path}).
   --ipc-apis APIS          Specify custom API set available via JSON-RPC over
-                           IPC [default: web3,eth,net,ethcore,personal,traces,rpc].
+                           IPC (default: {flag_ipc_apis}).
 
-  --no-dapps               Disable the Dapps server (e.g. status page).
+  --no-dapps               Disable the Dapps server (e.g. status page). (default: {flag_no_dapps})
   --dapps-port PORT        Specify the port portion of the Dapps server
-                           [default: 8080].
+                           (default: {flag_dapps_port}).
   --dapps-interface IP     Specify the hostname portion of the Dapps
                            server, IP should be an interface's IP address,
-                           or local [default: local].
+                           or local (default: {flag_dapps_interface}).
   --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].
+                           (default: {flag_dapps_hosts}).
   --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
-                           asked for password on startup.
+                           asked for password on startup. (default: {flag_dapps_user:?})
   --dapps-pass PASSWORD    Specify password for Dapps server. Use only in
-                           conjunction with --dapps-user.
+                           conjunction with --dapps-user. (default: {flag_dapps_pass:?})
   --dapps-path PATH        Specify directory where dapps should be installed.
-                           [default: $HOME/.parity/dapps]
+                           (default: {flag_dapps_path})
 
 Sealing/Mining Options:
   --author ADDRESS         Specify the block author (aka "coinbase") address
                            for sending block rewards from sealed blocks.
                            NOTE: MINING WILL NOT WORK WITHOUT THIS OPTION.
+                           (default: {flag_author:?})
   --force-sealing          Force the node to author new blocks as if it were
                            always sealing/mining.
+                           (default: {flag_force_sealing})
   --reseal-on-txs SET      Specify which transactions should force the node
                            to reseal a block. SET is one of:
                            none - never reseal on new transactions;
                            own - reseal only on a new local transaction;
                            ext - reseal only on a new external transaction;
-                           all - reseal on all new transactions [default: own].
+                           all - reseal on all new transactions
+                           (default: {flag_reseal_on_txs}).
   --reseal-min-period MS   Specify the minimum time between reseals from
                            incoming transactions. MS is time measured in
-                           milliseconds [default: 2000].
+                           milliseconds (default: {flag_reseal_min_period}).
   --work-queue-size ITEMS  Specify the number of historical work packages
                            which are kept cached lest a solution is found for
                            them later. High values take more memory but result
-                           in fewer unusable solutions [default: 20].
+                           in fewer unusable solutions (default: {flag_work_queue_size}).
   --tx-gas-limit GAS       Apply a limit of GAS as the maximum amount of gas
                            a single transaction may have for it to be mined.
+                           (default: {flag_tx_gas_limit:?})
   --relay-set SET          Set of transactions to relay. SET may be:
                            cheap - Relay any transaction in the queue (this
                            may include invalid transactions);
@@ -176,78 +162,81 @@ Sealing/Mining Options:
                            guarantees we don't relay invalid transactions, but
                            means we relay nothing if not mining);
                            lenient - Same as strict when mining, and cheap
-                           when not [default: cheap].
+                           when not (default: {flag_relay_set}).
   --usd-per-tx USD         Amount of USD to be paid for a basic transaction
-                           [default: 0]. The minimum gas price is set
+                           (default: {flag_usd_per_tx}). The minimum gas price is set
                            accordingly.
   --usd-per-eth SOURCE     USD value of a single ETH. SOURCE may be either an
                            amount in USD, a web service or 'auto' to use each
                            web service in turn and fallback on the last known
-                           good value [default: auto].
+                           good value (default: {flag_usd_per_eth}).
   --price-update-period T  T will be allowed to pass between each gas price
                            update. T may be daily, hourly, a number of seconds,
                            or a time string of the form "2 days", "30 minutes"
-                           etc. [default: hourly].
+                           etc. (default: {flag_price_update_period}).
   --gas-floor-target GAS   Amount of gas per block to target when sealing a new
-                           block [default: 4700000].
+                           block (default: {flag_gas_floor_target}).
   --gas-cap GAS            A cap on how large we will raise the gas limit per
-                           block due to transaction volume [default: 6283184].
+                           block due to transaction volume (default: {flag_gas_cap}).
   --extra-data STRING      Specify a custom extra-data for authored blocks, no
-                           more than 32 characters.
+                           more than 32 characters. (default: {flag_extra_data:?})
   --tx-queue-size LIMIT    Maximum amount of transactions in the queue (waiting
-                           to be included in next block) [default: 1024].
+                           to be included in next block) (default: {flag_tx_queue_size}).
   --remove-solved          Move solved blocks from the work package queue
                            instead of cloning them. This gives a slightly
                            faster import speed, but means that extra solutions
                            submitted for the same work package will go unused.
+                           (default: {flag_remove_solved})
   --notify-work URLS       URLs to which work package notifications are pushed.
                            URLS should be a comma-delimited list of HTTP URLs.
+                           (default: {flag_notify_work:?})
 
 Footprint Options:
   --tracing BOOL           Indicates if full transaction tracing should be
                            enabled. Works only if client had been fully synced
                            with tracing enabled. BOOL may be one of auto, on,
                            off. auto uses last used value of this option (off
-                           if it does not exist) [default: auto].
+                           if it does not exist) (default: {flag_tracing}).
   --pruning METHOD         Configure pruning of the state/storage trie. METHOD
                            may be one of auto, archive, fast:
                            archive - keep all state trie data. No pruning.
                            fast - maintain journal overlay. Fast but 50MB used.
                            auto - use the method most recently synced or
-                           default to fast if none synced [default: auto].
-  --cache-size-db MB       Override database cache size [default: 64].
+                           default to fast if none synced (default: {flag_pruning}).
+  --cache-size-db MB       Override database cache size (default: {flag_cache_size_db}).
   --cache-size-blocks MB   Specify the prefered size of the blockchain cache in
-                           megabytes [default: 8].
+                           megabytes (default: {flag_cache_size_blocks}).
   --cache-size-queue MB    Specify the maximum size of memory to use for block
-                           queue [default: 50].
+                           queue (default: {flag_cache_size_queue}).
   --cache-size MB          Set total amount of discretionary memory to use for
                            the entire system, overrides other cache and queue
-                           options.
+                           options.a (default: {flag_cache_size:?})
   --fast-and-loose         Disables DB WAL, which gives a significant speed up
-                           but means an unclean exit is unrecoverable.
+                           but means an unclean exit is unrecoverable. (default: {flag_fast_and_loose})
   --db-compaction TYPE     Database compaction type. TYPE may be one of:
                            ssd - suitable for SSDs and fast HDDs;
-                           hdd - suitable for slow HDDs [default: ssd].
-  --fat-db                 Fat database.
+                           hdd - suitable for slow HDDs (default: {flag_db_compaction}).
+  --fat-db                 Fat database. (default: {flag_fat_db})
 
 Import/Export Options:
   --from BLOCK             Export from block BLOCK, which may be an index or
-                           hash [default: 1].
+                           hash (default: {flag_from}).
   --to BLOCK               Export to (including) block BLOCK, which may be an
-                           index, hash or 'latest' [default: latest].
+                           index, hash or 'latest' (default: {flag_to}).
   --format FORMAT          For import/export in given format. FORMAT must be
                            one of 'hex' and 'binary'.
+                           (default: {flag_format:?} = Import: auto, Export: 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]
+                           (default: {flag_at})
   --no-periodic-snapshot   Disable automated snapshots which usually occur once
-                           every 10000 blocks.
+                           every 10000 blocks. (default: {flag_no_periodic_snapshot})
 
 Virtual Machine Options:
-  --jitvm                  Enable the JIT VM.
+  --jitvm                  Enable the JIT VM. (default: {flag_jitvm})
 
 Legacy Options:
   --geth                   Run in Geth-compatibility mode. Sets the IPC path
@@ -284,156 +273,14 @@ Legacy Options:
   --cache MB               Equivalent to --cache-size MB.
 
 Miscellaneous Options:
+  -c --config CONFIG       Specify a filename containing a configuration file.
+                           (default: {flag_config})
   -l --logging LOGGING     Specify the logging level. Must conform to the same
-                           format as RUST_LOG.
+                           format as RUST_LOG. (default: {flag_logging:?})
   --log-file FILENAME      Specify a filename into which logging should be
-                           directed.
-  --no-color               Don't use terminal color codes in output.
+                           directed. (default: {flag_log_file:?})
+  --no-config              Don't load a configuration file.
+  --no-color               Don't use terminal color codes in output. (default: {flag_no_color})
   -v --version             Show information about version.
   -h --help                Show this screen.
-"#;
-
-#[derive(Debug, PartialEq, RustcDecodable)]
-pub struct Args {
-	pub cmd_daemon: bool,
-	pub cmd_account: bool,
-	pub cmd_wallet: bool,
-	pub cmd_new: bool,
-	pub cmd_list: bool,
-	pub cmd_export: bool,
-	pub cmd_import: bool,
-	pub cmd_signer: bool,
-	pub cmd_new_token: bool,
-	pub cmd_snapshot: bool,
-	pub cmd_restore: bool,
-	pub cmd_ui: bool,
-	pub arg_pid_file: String,
-	pub arg_file: Option<String>,
-	pub arg_path: Vec<String>,
-	pub flag_mode: String,
-	pub flag_mode_timeout: u64,
-	pub flag_mode_alarm: u64,
-	pub flag_chain: String,
-	pub flag_db_path: String,
-	pub flag_identity: String,
-	pub flag_unlock: Option<String>,
-	pub flag_password: Vec<String>,
-	pub flag_keys_path: String,
-	pub flag_keys_iterations: u32,
-	pub flag_import_geth_keys: bool,
-	pub flag_bootnodes: Option<String>,
-	pub flag_network_id: Option<String>,
-	pub flag_pruning: String,
-	pub flag_tracing: String,
-	pub flag_port: u16,
-	pub flag_min_peers: u16,
-	pub flag_max_peers: u16,
-	pub flag_no_discovery: bool,
-	pub flag_nat: String,
-	pub flag_node_key: Option<String>,
-	pub flag_reserved_peers: Option<String>,
-	pub flag_reserved_only: bool,
-
-	pub flag_cache_size_db: u32,
-	pub flag_cache_size_blocks: u32,
-	pub flag_cache_size_queue: u32,
-	pub flag_cache_size: Option<u32>,
-	pub flag_cache: Option<u32>,
-	pub flag_fast_and_loose: bool,
-
-	pub flag_no_jsonrpc: bool,
-	pub flag_jsonrpc_interface: String,
-	pub flag_jsonrpc_port: u16,
-	pub flag_jsonrpc_cors: Option<String>,
-	pub flag_jsonrpc_hosts: String,
-	pub flag_jsonrpc_apis: String,
-	pub flag_no_ipc: bool,
-	pub flag_ipc_path: String,
-	pub flag_ipc_apis: String,
-	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,
-	pub flag_force_signer: bool,
-	pub flag_no_signer: bool,
-	pub flag_signer_port: u16,
-	pub flag_signer_interface: String,
-	pub flag_signer_path: String,
-	pub flag_signer_no_validation: bool,
-	pub flag_force_sealing: bool,
-	pub flag_reseal_on_txs: String,
-	pub flag_reseal_min_period: u64,
-	pub flag_work_queue_size: usize,
-	pub flag_remove_solved: bool,
-	pub flag_tx_gas_limit: Option<String>,
-	pub flag_relay_set: String,
-	pub flag_author: Option<String>,
-	pub flag_usd_per_tx: String,
-	pub flag_usd_per_eth: String,
-	pub flag_price_update_period: String,
-	pub flag_gas_floor_target: String,
-	pub flag_gas_cap: String,
-	pub flag_extra_data: Option<String>,
-	pub flag_tx_queue_size: usize,
-	pub flag_notify_work: Option<String>,
-	pub flag_logging: Option<String>,
-	pub flag_version: bool,
-	pub flag_from: String,
-	pub flag_to: String,
-	pub flag_at: String,
-	pub flag_no_periodic_snapshot: bool,
-	pub flag_format: Option<String>,
-	pub flag_jitvm: bool,
-	pub flag_log_file: Option<String>,
-	pub flag_no_color: bool,
-	pub flag_no_network: bool,
-	// legacy...
-	pub flag_geth: bool,
-	pub flag_nodekey: Option<String>,
-	pub flag_nodiscover: bool,
-	pub flag_peers: Option<u16>,
-	pub flag_datadir: Option<String>,
-	pub flag_extradata: Option<String>,
-	pub flag_etherbase: Option<String>,
-	pub flag_gasprice: Option<String>,
-	pub flag_jsonrpc: bool,
-	pub flag_webapp: bool,
-	pub flag_rpc: bool,
-	pub flag_rpcaddr: Option<String>,
-	pub flag_rpcport: Option<u16>,
-	pub flag_rpccorsdomain: Option<String>,
-	pub flag_rpcapi: Option<String>,
-	pub flag_testnet: bool,
-	pub flag_networkid: Option<String>,
-	pub flag_ipcdisable: bool,
-	pub flag_ipc_off: bool,
-	pub flag_jsonrpc_off: bool,
-	pub flag_dapps_off: bool,
-	pub flag_ipcpath: Option<String>,
-	pub flag_ipcapi: Option<String>,
-	pub flag_db_compaction: String,
-	pub flag_fat_db: bool,
-}
-
-impl Default for Args {
-	fn default() -> Self {
-		Docopt::new(USAGE).unwrap().argv(&[] as &[&str]).decode().unwrap()
-	}
-}
-
-pub fn print_version() -> String {
-	format!("\
-Parity
-  version {}
-Copyright 2015, 2016 Ethcore (UK) Limited
-License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
-This is free software: you are free to change and redistribute it.
-There is NO WARRANTY, to the extent permitted by law.
-
-By Wood/Paronyan/Kotewicz/Drwięga/Volf.\
-", version())
-}
 
diff --git a/parity/cli/version.txt b/parity/cli/version.txt
new file mode 100644
index 000000000..acb7cd9e6
--- /dev/null
+++ b/parity/cli/version.txt
@@ -0,0 +1,9 @@
+Parity
+  version {}
+Copyright 2015, 2016 Ethcore (UK) Limited
+License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+
+By Wood/Paronyan/Kotewicz/Drwięga/Volf.
+
diff --git a/parity/configuration.rs b/parity/configuration.rs
index 51d637580..6ee89eb35 100644
--- a/parity/configuration.rs
+++ b/parity/configuration.rs
@@ -19,8 +19,7 @@ use std::io::Read;
 use std::net::SocketAddr;
 use std::path::PathBuf;
 use std::cmp::max;
-use cli::{USAGE, Args};
-use docopt::{Docopt, Error as DocoptError};
+use cli::{Args, ArgsError};
 use util::{Hashable, U256, Uint, Bytes, version_data, Secret, Address};
 use util::log::Colour;
 use ethsync::{NetworkConfiguration, is_valid_node_url};
@@ -60,8 +59,8 @@ pub struct Configuration {
 }
 
 impl Configuration {
-	pub fn parse<S, I>(command: I) -> Result<Self, DocoptError> where I: IntoIterator<Item=S>, S: AsRef<str> {
-		let args = try!(Docopt::new(USAGE).and_then(|d| d.argv(command).decode()));
+	pub fn parse<S: AsRef<str>>(command: &[S]) -> Result<Self, ArgsError> {
+		let args = try!(Args::parse(command));
 
 		let config = Configuration {
 			args: args,
@@ -628,8 +627,7 @@ impl Configuration {
 #[cfg(test)]
 mod tests {
 	use super::*;
-	use cli::USAGE;
-	use docopt::Docopt;
+	use cli::Args;
 	use ethcore_rpc::NetworkSettings;
 	use ethcore::client::{VMType, BlockID};
 	use helpers::{replace_home, default_network_config};
@@ -647,21 +645,21 @@ mod tests {
 
 	fn parse(args: &[&str]) -> Configuration {
 		Configuration {
-			args: Docopt::new(USAGE).unwrap().argv(args).decode().unwrap(),
+			args: Args::parse_without_config(args).unwrap(),
 		}
 	}
 
 	#[test]
 	fn test_command_version() {
 		let args = vec!["parity", "--version"];
-		let conf = Configuration::parse(args).unwrap();
+		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap(), Cmd::Version);
 	}
 
 	#[test]
 	fn test_command_account_new() {
 		let args = vec!["parity", "account", "new"];
-		let conf = Configuration::parse(args).unwrap();
+		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap(), Cmd::Account(AccountCmd::New(NewAccount {
 			iterations: 10240,
 			path: replace_home("$HOME/.parity/keys"),
@@ -672,7 +670,7 @@ mod tests {
 	#[test]
 	fn test_command_account_list() {
 		let args = vec!["parity", "account", "list"];
-		let conf = Configuration::parse(args).unwrap();
+		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap(), Cmd::Account(
 			AccountCmd::List(replace_home("$HOME/.parity/keys")))
 		);
@@ -681,7 +679,7 @@ mod tests {
 	#[test]
 	fn test_command_account_import() {
 		let args = vec!["parity", "account", "import", "my_dir", "another_dir"];
-		let conf = Configuration::parse(args).unwrap();
+		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap(), Cmd::Account(AccountCmd::Import(ImportAccounts {
 			from: vec!["my_dir".into(), "another_dir".into()],
 			to: replace_home("$HOME/.parity/keys"),
@@ -691,7 +689,7 @@ mod tests {
 	#[test]
 	fn test_command_wallet_import() {
 		let args = vec!["parity", "wallet", "import", "my_wallet.json", "--password", "pwd"];
-		let conf = Configuration::parse(args).unwrap();
+		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap(), Cmd::ImportPresaleWallet(ImportWallet {
 			iterations: 10240,
 			path: replace_home("$HOME/.parity/keys"),
@@ -703,7 +701,7 @@ mod tests {
 	#[test]
 	fn test_command_blockchain_import() {
 		let args = vec!["parity", "import", "blockchain.json"];
-		let conf = Configuration::parse(args).unwrap();
+		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap(), Cmd::Blockchain(BlockchainCmd::Import(ImportBlockchain {
 			spec: Default::default(),
 			logger_config: Default::default(),
@@ -723,7 +721,7 @@ mod tests {
 	#[test]
 	fn test_command_blockchain_export() {
 		let args = vec!["parity", "export", "blockchain.json"];
-		let conf = Configuration::parse(args).unwrap();
+		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap(), Cmd::Blockchain(BlockchainCmd::Export(ExportBlockchain {
 			spec: Default::default(),
 			logger_config: Default::default(),
@@ -744,7 +742,7 @@ mod tests {
 	#[test]
 	fn test_command_blockchain_export_with_custom_format() {
 		let args = vec!["parity", "export", "--format", "hex", "blockchain.json"];
-		let conf = Configuration::parse(args).unwrap();
+		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap(), Cmd::Blockchain(BlockchainCmd::Export(ExportBlockchain {
 			spec: Default::default(),
 			logger_config: Default::default(),
@@ -765,7 +763,7 @@ mod tests {
 	#[test]
 	fn test_command_signer_new_token() {
 		let args = vec!["parity", "signer", "new-token"];
-		let conf = Configuration::parse(args).unwrap();
+		let conf = parse(&args);
 		let expected = replace_home("$HOME/.parity/signer");
 		assert_eq!(conf.into_command().unwrap(), Cmd::SignerToken(expected));
 	}
@@ -773,7 +771,7 @@ mod tests {
 	#[test]
 	fn test_run_cmd() {
 		let args = vec!["parity"];
-		let conf = Configuration::parse(args).unwrap();
+		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap(), Cmd::Run(RunCmd {
 			cache_config: Default::default(),
 			dirs: Default::default(),
@@ -962,7 +960,7 @@ mod tests {
 		let filename = temp.as_str().to_owned() + "/peers";
 		File::create(filename.clone()).unwrap().write_all(b"  \n\t\n").unwrap();
 		let args = vec!["parity", "--reserved-peers", &filename];
-		let conf = Configuration::parse(args).unwrap();
+		let conf = Configuration::parse(&args).unwrap();
 		assert!(conf.init_reserved_nodes().is_ok());
 	}
 }
diff --git a/parity/informant.rs b/parity/informant.rs
index 58accd140..f2cc41f64 100644
--- a/parity/informant.rs
+++ b/parity/informant.rs
@@ -41,7 +41,9 @@ pub struct Informant {
 	skipped: AtomicUsize,
 }
 
-trait MillisecondDuration {
+/// Something that can be converted to milliseconds.
+pub trait MillisecondDuration {
+	/// Get the value in milliseconds.
 	fn as_milliseconds(&self) -> u64;
 }
 
diff --git a/parity/main.rs b/parity/main.rs
index 9c2ae7942..8cb348958 100644
--- a/parity/main.rs
+++ b/parity/main.rs
@@ -51,6 +51,7 @@ extern crate ansi_term;
 
 extern crate regex;
 extern crate isatty;
+extern crate toml;
 
 #[macro_use]
 extern crate ethcore_util as util;
@@ -110,7 +111,7 @@ mod boot;
 mod stratum;
 
 use std::{process, env};
-use cli::print_version;
+use cli::Args;
 use configuration::{Cmd, Configuration};
 use deprecated::find_deprecated;
 
@@ -120,7 +121,7 @@ fn execute(command: Cmd) -> Result<String, String> {
 			try!(run::execute(run_cmd));
 			Ok("".into())
 		},
-		Cmd::Version => Ok(print_version()),
+		Cmd::Version => Ok(Args::print_version()),
 		Cmd::Account(account_cmd) => account::execute(account_cmd),
 		Cmd::ImportPresaleWallet(presale_cmd) => presale::execute(presale_cmd),
 		Cmd::Blockchain(blockchain_cmd) => blockchain::execute(blockchain_cmd),
@@ -130,7 +131,8 @@ fn execute(command: Cmd) -> Result<String, String> {
 }
 
 fn start() -> Result<String, String> {
-	let conf = Configuration::parse(env::args()).unwrap_or_else(|e| e.exit());
+	let args: Vec<String> = env::args().collect();
+	let conf = Configuration::parse(&args).unwrap_or_else(|e| e.exit());
 
 	let deprecated = find_deprecated(&conf.args);
 	for d in deprecated {
diff --git a/rpc/Cargo.toml b/rpc/Cargo.toml
index 8bb16007f..440e41fc9 100644
--- a/rpc/Cargo.toml
+++ b/rpc/Cargo.toml
@@ -27,7 +27,7 @@ rlp = { path = "../util/rlp" }
 rustc-serialize = "0.3"
 transient-hashmap = "0.1"
 serde_macros = { version = "0.8.0", optional = true }
-clippy = { version = "0.0.85", optional = true}
+clippy = { version = "0.0.90", optional = true}
 json-ipc-server = { git = "https://github.com/ethcore/json-ipc-server.git" }
 ethcore-ipc = { path = "../ipc/rpc" }
 time = "0.1"
diff --git a/rpc/src/v1/helpers/params.rs b/rpc/src/v1/helpers/params.rs
index c38529e4e..4a6abf542 100644
--- a/rpc/src/v1/helpers/params.rs
+++ b/rpc/src/v1/helpers/params.rs
@@ -28,7 +28,8 @@ pub fn expect_no_params(params: Params) -> Result<(), Error> {
 	}
 }
 
-fn params_len(params: &Params) -> usize {
+/// Returns number of different parameters in given `Params` object.
+pub fn params_len(params: &Params) -> usize {
 	match params {
 		&Params::Array(ref vec) => vec.len(),
 		_ => 0,
diff --git a/rpc/src/v1/impls/eth.rs b/rpc/src/v1/impls/eth.rs
index 9487f020d..d3bf68735 100644
--- a/rpc/src/v1/impls/eth.rs
+++ b/rpc/src/v1/impls/eth.rs
@@ -45,7 +45,7 @@ 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, 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};
+use v1::helpers::params::{expect_no_params, params_len, from_params_default_second, from_params_default_third};
 
 /// Eth RPC options
 pub struct EthClientOptions {
@@ -498,22 +498,33 @@ impl<C, S: ?Sized, M, EM> Eth for EthClient<C, S, M, EM> where
 
 	fn logs(&self, params: Params) -> Result<Value, Error> {
 		try!(self.active());
-		from_params::<(Filter,)>(params)
-			.and_then(|(filter,)| {
-				let include_pending = filter.to_block == Some(BlockNumber::Pending);
-				let filter: EthcoreFilter = filter.into();
-				let mut logs = take_weak!(self.client).logs(filter.clone())
-					.into_iter()
-					.map(From::from)
-					.collect::<Vec<Log>>();
+		let params = match params_len(&params) {
+			1 => from_params::<(Filter, )>(params).map(|(filter, )| (filter, None)),
+			_ => from_params::<(Filter, usize)>(params).map(|(filter, val)| (filter, Some(val))),
+		};
+		params.and_then(|(filter, limit)| {
+			let include_pending = filter.to_block == Some(BlockNumber::Pending);
+			let filter: EthcoreFilter = filter.into();
+			let mut logs = take_weak!(self.client).logs(filter.clone(), limit)
+				.into_iter()
+				.map(From::from)
+				.collect::<Vec<Log>>();
 
-				if include_pending {
-					let pending = pending_logs(&*take_weak!(self.miner), &filter);
-					logs.extend(pending);
-				}
+			if include_pending {
+				let pending = pending_logs(&*take_weak!(self.miner), &filter);
+				logs.extend(pending);
+			}
 
-				Ok(to_value(&logs))
-			})
+			let len = logs.len();
+			match limit {
+				Some(limit) if len >= limit => {
+					logs = logs.split_off(len - limit);
+				},
+				_ => {},
+			}
+
+			Ok(to_value(&logs))
+		})
 	}
 
 	fn work(&self, params: Params) -> Result<Value, Error> {
diff --git a/rpc/src/v1/impls/eth_filter.rs b/rpc/src/v1/impls/eth_filter.rs
index a4c834e99..38d6822d2 100644
--- a/rpc/src/v1/impls/eth_filter.rs
+++ b/rpc/src/v1/impls/eth_filter.rs
@@ -152,7 +152,7 @@ impl<C, M> EthFilter for EthFilterClient<C, M> where
 							filter.to_block = BlockID::Latest;
 
 							// retrieve logs in range from_block..min(BlockID::Latest..to_block)
-							let mut logs = client.logs(filter.clone())
+							let mut logs = client.logs(filter.clone(), None)
 								.into_iter()
 								.map(From::from)
 								.collect::<Vec<Log>>();
@@ -194,7 +194,7 @@ impl<C, M> EthFilter for EthFilterClient<C, M> where
 					Some(&PollFilter::Logs(ref _block_number, ref _previous_log, ref filter)) => {
 						let include_pending = filter.to_block == Some(BlockNumber::Pending);
 						let filter: EthcoreFilter = filter.clone().into();
-						let mut logs = take_weak!(self.client).logs(filter.clone())
+						let mut logs = take_weak!(self.client).logs(filter.clone(), None)
 							.into_iter()
 							.map(From::from)
 							.collect::<Vec<Log>>();
diff --git a/rpc/src/v1/tests/mocked/eth.rs b/rpc/src/v1/tests/mocked/eth.rs
index e7888a8c5..0f1693963 100644
--- a/rpc/src/v1/tests/mocked/eth.rs
+++ b/rpc/src/v1/tests/mocked/eth.rs
@@ -149,6 +149,28 @@ fn rpc_eth_hashrate() {
 	assert_eq!(tester.io.handle_request_sync(request), Some(response.to_owned()));
 }
 
+#[test]
+fn rpc_eth_logs() {
+	let tester = EthTester::default();
+
+	let request = r#"{"jsonrpc": "2.0", "method": "eth_getLogs", "params": [{}], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":[],"id":1}"#;
+
+	assert_eq!(tester.io.handle_request_sync(request), Some(response.to_owned()));
+}
+
+#[test]
+fn rpc_eth_logs_with_limit() {
+	let tester = EthTester::default();
+
+	let request1 = r#"{"jsonrpc": "2.0", "method": "eth_getLogs", "params": [{}, 1], "id": 1}"#;
+	let request2 = r#"{"jsonrpc": "2.0", "method": "eth_getLogs", "params": [{}, 0], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":[],"id":1}"#;
+
+	assert_eq!(tester.io.handle_request_sync(request1), Some(response.to_owned()));
+	assert_eq!(tester.io.handle_request_sync(request2), Some(response.to_owned()));
+}
+
 #[test]
 fn rpc_eth_submit_hashrate() {
 	let tester = EthTester::default();
diff --git a/script/deploy.sh b/script/deploy.sh
deleted file mode 100644
index 861dd6df6..000000000
--- a/script/deploy.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/bin/bash
-ll
-ls
-la
diff --git a/scripts/deploy.sh b/scripts/deploy.sh
new file mode 100644
index 000000000..3fcd05f7f
--- /dev/null
+++ b/scripts/deploy.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+ll
+ls
+la
+echo "list of biniries"
+exit
diff --git a/scripts/targets.sh b/scripts/targets.sh
index 009b8ad1d..529937c23 100644
--- a/scripts/targets.sh
+++ b/scripts/targets.sh
@@ -1,10 +1,10 @@
 #!/bin/bash
 
 export TARGETS="
-	-p bigint\
 	-p rlp\
 	-p ethash \
 	-p ethcore \
+	-p ethcore-bigint\
 	-p ethcore-dapps \
 	-p ethcore-rpc \
 	-p ethcore-signer \
diff --git a/signer/Cargo.toml b/signer/Cargo.toml
index 8b7268dde..3d0e76896 100644
--- a/signer/Cargo.toml
+++ b/signer/Cargo.toml
@@ -22,7 +22,7 @@ ethcore-rpc = { path = "../rpc" }
 ethcore-devtools = { path = "../devtools" }
 parity-dapps-signer = { git = "https://github.com/ethcore/parity-ui.git", version = "1.4", optional = true}
 
-clippy = { version = "0.0.85", optional = true}
+clippy = { version = "0.0.90", optional = true}
 
 [features]
 dev = ["clippy"]
diff --git a/signer/src/ws_server/mod.rs b/signer/src/ws_server/mod.rs
index 6d332adbe..57223ccd9 100644
--- a/signer/src/ws_server/mod.rs
+++ b/signer/src/ws_server/mod.rs
@@ -127,7 +127,7 @@ impl Server {
 		// Spawn a thread with event loop
 		let handle = thread::spawn(move || {
 			ph.catch_panic(move || {
-				match ws.listen(addr.clone()).map_err(ServerError::from) {
+				match ws.listen(addr).map_err(ServerError::from) {
 					Err(ServerError::IoError(io)) => die(format!(
 						"Signer: Could not start listening on specified address. Make sure that no other instance is running on Signer's port. Details: {:?}",
 						io
diff --git a/sync/Cargo.toml b/sync/Cargo.toml
index 500ae0778..0fa6462cc 100644
--- a/sync/Cargo.toml
+++ b/sync/Cargo.toml
@@ -19,7 +19,7 @@ ethcore-io = { path = "../util/io" }
 ethcore = { path = "../ethcore" }
 rlp = { path = "../util/rlp" }
 ethcore-devtools = { path = "../devtools" }
-clippy = { version = "0.0.85", optional = true}
+clippy = { version = "0.0.90", optional = true}
 log = "0.3"
 env_logger = "0.3"
 time = "0.1.34"
diff --git a/sync/src/chain.rs b/sync/src/chain.rs
index 771099905..5a4273967 100644
--- a/sync/src/chain.rs
+++ b/sync/src/chain.rs
@@ -426,7 +426,7 @@ impl ChainSync {
 		self.request_snapshot_manifest(io, peer_id);
 		self.state = SyncState::SnapshotManifest;
 	}
-  
+
 	/// Restart sync after bad block has been detected. May end up re-downloading up to QUEUE_SIZE blocks
 	fn restart_on_bad_block(&mut self, io: &mut SyncIo) {
 		// Do not assume that the block queue/chain still has our last_imported_block
@@ -807,7 +807,7 @@ impl ChainSync {
 		}
 
 		let manifest_rlp = try!(r.at(0));
-		let manifest = match ManifestData::from_rlp(&manifest_rlp.as_raw()) {
+		let manifest = match ManifestData::from_rlp(manifest_rlp.as_raw()) {
 			Err(e) => {
 				trace!(target: "sync", "{}: Ignored bad manifest: {:?}", peer_id, e);
 				io.disconnect_peer(peer_id);
@@ -996,8 +996,8 @@ impl ChainSync {
 						self.request_snapshot_data(io, peer_id);
 					}
 				},
-				SyncState::SnapshotManifest => (), //already downloading from other peer
-				SyncState::Waiting | SyncState::SnapshotWaiting => ()
+				SyncState::SnapshotManifest | //already downloading from other peer
+					SyncState::Waiting | SyncState::SnapshotWaiting => ()
 			}
 		}
 	}
@@ -1441,8 +1441,7 @@ impl ChainSync {
 			},
 			None => {
 				trace!(target: "sync", "{}: No manifest to return", peer_id);
-				let rlp = RlpStream::new_list(0);
-				rlp
+				RlpStream::new_list(0)
 			}
 		};
 		Ok(Some((SNAPSHOT_MANIFEST_PACKET, rlp)))
@@ -1459,8 +1458,7 @@ impl ChainSync {
 				rlp
 			},
 			None => {
-				let rlp = RlpStream::new_list(0);
-				rlp
+				RlpStream::new_list(0)
 			}
 		};
 		Ok(Some((SNAPSHOT_DATA_PACKET, rlp)))
@@ -1545,6 +1543,7 @@ impl ChainSync {
 		})
 	}
 
+	#[cfg_attr(feature="dev", allow(match_same_arms))]
 	pub fn maintain_peers(&mut self, io: &mut SyncIo) {
 		let tick = time::precise_time_s();
 		let mut aborting = Vec::new();
@@ -1713,7 +1712,7 @@ impl ChainSync {
 			return 0;
 		}
 
-		let all_transactions_hashes = transactions.iter().map(|ref tx| tx.hash()).collect::<HashSet<H256>>();
+		let all_transactions_hashes = transactions.iter().map(|tx| tx.hash()).collect::<HashSet<H256>>();
 		let all_transactions_rlp = {
 			let mut packet = RlpStream::new_list(transactions.len());
 			for tx in &transactions { packet.append(tx); }
@@ -1864,8 +1863,8 @@ mod tests {
 	fn return_receipts_empty() {
 		let mut client = TestBlockChainClient::new();
 		let mut queue = VecDeque::new();
-		let mut ss = TestSnapshotService::new();
-		let io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		let result = ChainSync::return_receipts(&io, &UntrustedRlp::new(&[0xc0]), 0);
 
@@ -1877,8 +1876,8 @@ mod tests {
 		let mut client = TestBlockChainClient::new();
 		let mut queue = VecDeque::new();
 		let sync = dummy_sync_with_peer(H256::new(), &client);
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		let mut receipt_list = RlpStream::new_list(4);
 		receipt_list.append(&H256::from("0000000000000000000000000000000000000000000000005555555555555555"));
@@ -1933,8 +1932,8 @@ mod tests {
 		let hashes: Vec<_> = headers.iter().map(|h| HeaderView::new(h).sha3()).collect();
 
 		let mut queue = VecDeque::new();
-		let mut ss = TestSnapshotService::new();
-		let io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		let unknown: H256 = H256::new();
 		let result = ChainSync::return_block_headers(&io, &UntrustedRlp::new(&make_hash_req(&unknown, 1, 0, false)), 0);
@@ -1972,8 +1971,8 @@ mod tests {
 		let mut client = TestBlockChainClient::new();
 		let mut queue = VecDeque::new();
 		let sync = dummy_sync_with_peer(H256::new(), &client);
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		let mut node_list = RlpStream::new_list(3);
 		node_list.append(&H256::from("0000000000000000000000000000000000000000000000005555555555555555"));
@@ -2028,8 +2027,8 @@ mod tests {
 		let mut queue = VecDeque::new();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(10), &client);
 		let chain_info = client.chain_info();
-		let mut ss = TestSnapshotService::new();
-		let io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		let lagging_peers = sync.get_lagging_peers(&chain_info, &io);
 
@@ -2060,8 +2059,8 @@ mod tests {
 		let mut queue = VecDeque::new();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
 		let chain_info = client.chain_info();
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		let peers = sync.get_lagging_peers(&chain_info, &io);
 		let peer_count = sync.propagate_new_hashes(&chain_info, &mut io, &peers);
@@ -2081,8 +2080,8 @@ mod tests {
 		let mut queue = VecDeque::new();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
 		let chain_info = client.chain_info();
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 		let peers = sync.get_lagging_peers(&chain_info, &io);
 		let peer_count = sync.propagate_blocks(&chain_info, &mut io, &[], &peers);
 
@@ -2102,8 +2101,8 @@ mod tests {
 		let hash = client.block_hash(BlockID::Number(99)).unwrap();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
 		let chain_info = client.chain_info();
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 		let peers = sync.get_lagging_peers(&chain_info, &io);
 		let peer_count = sync.propagate_blocks(&chain_info, &mut io, &[hash.clone()], &peers);
 
@@ -2122,8 +2121,8 @@ mod tests {
 		client.insert_transaction_to_queue();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(1), &client);
 		let mut queue = VecDeque::new();
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 		let peer_count = sync.propagate_new_transactions(&mut io);
 		// Try to propagate same transactions for the second time
 		let peer_count2 = sync.propagate_new_transactions(&mut io);
@@ -2144,8 +2143,8 @@ mod tests {
 		client.insert_transaction_to_queue();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(1), &client);
 		let mut queue = VecDeque::new();
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 		let peer_count = sync.propagate_new_transactions(&mut io);
 		sync.chain_new_blocks(&mut io, &[], &[], &[], &[], &[]);
 		// Try to propagate same transactions for the second time
@@ -2168,17 +2167,17 @@ mod tests {
 		client.insert_transaction_to_queue();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(1), &client);
 		let mut queue = VecDeque::new();
-		let mut ss = TestSnapshotService::new();
+		let ss = TestSnapshotService::new();
 		// should sent some
 		{
-			let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+			let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 			let peer_count = sync.propagate_new_transactions(&mut io);
 			assert_eq!(1, io.queue.len());
 			assert_eq!(1, peer_count);
 		}
 		// Insert some more
 		client.insert_transaction_to_queue();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 		// Propagate new transactions
 		let peer_count2 = sync.propagate_new_transactions(&mut io);
 		// And now the peer should have all transactions
@@ -2204,8 +2203,8 @@ mod tests {
 		let mut queue = VecDeque::new();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
 		//sync.have_common_block = true;
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		let block = UntrustedRlp::new(&block_data);
 
@@ -2223,8 +2222,8 @@ mod tests {
 
 		let mut queue = VecDeque::new();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		let block = UntrustedRlp::new(&block_data);
 
@@ -2239,8 +2238,8 @@ mod tests {
 		client.add_blocks(10, EachBlockWith::Uncle);
 		let mut queue = VecDeque::new();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		let empty_data = vec![];
 		let block = UntrustedRlp::new(&empty_data);
@@ -2256,8 +2255,8 @@ mod tests {
 		client.add_blocks(10, EachBlockWith::Uncle);
 		let mut queue = VecDeque::new();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		let hashes_data = get_dummy_hashes();
 		let hashes_rlp = UntrustedRlp::new(&hashes_data);
@@ -2273,8 +2272,8 @@ mod tests {
 		client.add_blocks(10, EachBlockWith::Uncle);
 		let mut queue = VecDeque::new();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		let empty_hashes_data = vec![];
 		let hashes_rlp = UntrustedRlp::new(&empty_hashes_data);
@@ -2293,8 +2292,8 @@ mod tests {
 		let mut queue = VecDeque::new();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
 		let chain_info = client.chain_info();
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		let peers = sync.get_lagging_peers(&chain_info, &io);
 		sync.propagate_new_hashes(&chain_info, &mut io, &peers);
@@ -2313,8 +2312,8 @@ mod tests {
 		let mut queue = VecDeque::new();
 		let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
 		let chain_info = client.chain_info();
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		let peers = sync.get_lagging_peers(&chain_info, &io);
 		sync.propagate_blocks(&chain_info, &mut io, &[], &peers);
@@ -2348,8 +2347,8 @@ mod tests {
 		// when
 		{
 			let mut queue = VecDeque::new();
-			let mut ss = TestSnapshotService::new();
-			let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+			let ss = TestSnapshotService::new();
+			let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 			io.chain.miner.chain_new_blocks(io.chain, &[], &[], &[], &good_blocks);
 			sync.chain_new_blocks(&mut io, &[], &[], &[], &good_blocks, &[]);
 			assert_eq!(io.chain.miner.status().transactions_in_future_queue, 0);
@@ -2363,8 +2362,8 @@ mod tests {
 		}
 		{
 			let mut queue = VecDeque::new();
-			let mut ss = TestSnapshotService::new();
-			let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+			let ss = TestSnapshotService::new();
+			let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 			io.chain.miner.chain_new_blocks(io.chain, &[], &[], &good_blocks, &retracted_blocks);
 			sync.chain_new_blocks(&mut io, &[], &[], &good_blocks, &retracted_blocks, &[]);
 		}
@@ -2388,8 +2387,8 @@ mod tests {
 		let retracted_blocks = vec![client.block_hash_delta_minus(1)];
 
 		let mut queue = VecDeque::new();
-		let mut ss = TestSnapshotService::new();
-		let mut io = TestIo::new(&mut client, &mut ss, &mut queue, None);
+		let ss = TestSnapshotService::new();
+		let mut io = TestIo::new(&mut client, &ss, &mut queue, None);
 
 		// when
 		sync.chain_new_blocks(&mut io, &[], &[], &[], &good_blocks, &[]);
diff --git a/sync/src/tests/snapshot.rs b/sync/src/tests/snapshot.rs
index b27602b0d..adbb3ce48 100644
--- a/sync/src/tests/snapshot.rs
+++ b/sync/src/tests/snapshot.rs
@@ -74,14 +74,14 @@ impl SnapshotService for TestSnapshotService {
 	}
 
 	fn status(&self) -> RestorationStatus {
-		match &*self.restoration_manifest.lock() {
-			&Some(ref manifest) if self.state_restoration_chunks.lock().len() == manifest.state_hashes.len() &&
+		match *self.restoration_manifest.lock() {
+			Some(ref manifest) if self.state_restoration_chunks.lock().len() == manifest.state_hashes.len() &&
 				self.block_restoration_chunks.lock().len() == manifest.block_hashes.len() => RestorationStatus::Inactive,
-			&Some(_) => RestorationStatus::Ongoing {
+			Some(_) => RestorationStatus::Ongoing {
 				state_chunks_done: self.state_restoration_chunks.lock().len() as u32,
 				block_chunks_done: self.block_restoration_chunks.lock().len() as u32,
 			},
-			&None => RestorationStatus::Inactive,
+			None => RestorationStatus::Inactive,
 		}
 	}
 
@@ -98,13 +98,13 @@ impl SnapshotService for TestSnapshotService {
 	}
 
 	fn restore_state_chunk(&self, hash: H256, chunk: Bytes) {
-		if self.restoration_manifest.lock().as_ref().map_or(false, |ref m| m.state_hashes.iter().any(|h| h == &hash)) {
+		if self.restoration_manifest.lock().as_ref().map_or(false, |m| m.state_hashes.iter().any(|h| h == &hash)) {
 			self.state_restoration_chunks.lock().insert(hash, chunk);
 		}
 	}
 
 	fn restore_block_chunk(&self, hash: H256, chunk: Bytes) {
-		if self.restoration_manifest.lock().as_ref().map_or(false, |ref m| m.block_hashes.iter().any(|h| h == &hash)) {
+		if self.restoration_manifest.lock().as_ref().map_or(false, |m| m.block_hashes.iter().any(|h| h == &hash)) {
 			self.block_restoration_chunks.lock().insert(hash, chunk);
 		}
 	}
diff --git a/util/Cargo.toml b/util/Cargo.toml
index 106251a3f..81916555c 100644
--- a/util/Cargo.toml
+++ b/util/Cargo.toml
@@ -23,12 +23,12 @@ rlp = { path = "rlp" }
 heapsize = { version = "0.3", features = ["unstable"] }
 itertools = "0.4"
 sha3 = { path = "sha3" }
-clippy = { version = "0.0.85", optional = true}
+clippy = { version = "0.0.90", optional = true}
 ethcore-devtools = { path = "../devtools" }
 libc = "0.2.7"
 vergen = "0.1"
 target_info = "0.1"
-bigint = { path = "bigint" }
+ethcore-bigint = { path = "bigint" }
 parking_lot = "0.2.6"
 using_queue = { path = "using_queue" }
 table = { path = "table" }
diff --git a/util/bigint/Cargo.toml b/util/bigint/Cargo.toml
index 68778e18c..ee25ce846 100644
--- a/util/bigint/Cargo.toml
+++ b/util/bigint/Cargo.toml
@@ -1,8 +1,9 @@
 [package]
-description = "Rust-assembler implementation of big integers arithmetic"
+description = "Large fixed-size integers and hash function outputs"
 homepage = "http://ethcore.io"
+repository = "https://github.com/ethcore/parity"
 license = "GPL-3.0"
-name = "bigint"
+name = "ethcore-bigint"
 version = "0.1.0"
 authors = ["Ethcore <admin@ethcore.io>"]
 build = "build.rs"
diff --git a/util/bigint/src/lib.rs b/util/bigint/src/lib.rs
index 746cc8139..307aed3ce 100644
--- a/util/bigint/src/lib.rs
+++ b/util/bigint/src/lib.rs
@@ -14,6 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+//! Efficient large, fixed-size big integers and hashes.
+
 #![cfg_attr(asm_available, feature(asm))]
 
 extern crate rand;
diff --git a/util/bigint/src/uint.rs b/util/bigint/src/uint.rs
index c5dd033cb..dab00537e 100644
--- a/util/bigint/src/uint.rs
+++ b/util/bigint/src/uint.rs
@@ -30,11 +30,12 @@
 // If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
 //
 
-//! Big unsigned integer types
+//! Big unsigned integer types.
 //!
 //! Implementation of a various large-but-fixed sized unsigned integer types.
-//! The functions here are designed to be fast.
-//!
+//! The functions here are designed to be fast. There are optional `x86_64`
+//! implementations for even more speed, hidden behind the `x64_arithmetic`
+//! feature flag.
 
 use std::{mem, fmt};
 use std::str::{FromStr};
diff --git a/util/network/Cargo.toml b/util/network/Cargo.toml
index 50ef6a5e4..0a3dfeff9 100644
--- a/util/network/Cargo.toml
+++ b/util/network/Cargo.toml
@@ -14,7 +14,7 @@ time = "0.1.34"
 tiny-keccak = "1.0"
 rust-crypto = "0.2.34"
 slab = "0.2"
-clippy = { version = "0.0.85", optional = true}
+clippy = { version = "0.0.90", optional = true}
 igd = "0.5.0"
 libc = "0.2.7"
 parking_lot = "0.2.6"
diff --git a/util/rlp/Cargo.toml b/util/rlp/Cargo.toml
index eba3a2842..c24e4cc59 100644
--- a/util/rlp/Cargo.toml
+++ b/util/rlp/Cargo.toml
@@ -7,6 +7,6 @@ authors = ["Ethcore <admin@ethcore.io>"]
 
 [dependencies]
 elastic-array = "0.5"
-bigint = { path = "../bigint" }
+ethcore-bigint = { path = "../bigint" }
 lazy_static = "0.2"
 rustc-serialize = "0.3"
\ No newline at end of file
diff --git a/util/rlp/src/lib.rs b/util/rlp/src/lib.rs
index 2cc8c3bd8..da5e816b5 100644
--- a/util/rlp/src/lib.rs
+++ b/util/rlp/src/lib.rs
@@ -65,7 +65,7 @@ pub use self::rlpin::{Rlp, RlpIterator};
 pub use self::rlpstream::RlpStream;
 pub use self::rlpcompression::RlpType;
 
-extern crate bigint;
+extern crate ethcore_bigint as bigint;
 extern crate elastic_array;
 extern crate rustc_serialize;
 
diff --git a/util/src/kvdb.rs b/util/src/kvdb.rs
index 3a89ae293..708b8d870 100644
--- a/util/src/kvdb.rs
+++ b/util/src/kvdb.rs
@@ -330,8 +330,8 @@ impl Database {
 
 	/// Commit buffered changes to database.
 	pub fn flush(&self) -> Result<(), String> {
-		match &*self.db.read() {
-			&Some(DBAndColumns { ref db, ref cfs }) => {
+		match *self.db.read() {
+			Some(DBAndColumns { ref db, ref cfs }) => {
 				let batch = WriteBatch::new();
 				let mut overlay = self.overlay.write();
 
@@ -366,15 +366,15 @@ impl Database {
 				}
 				db.write_opt(batch, &self.write_opts)
 			},
-			&None => Err("Database is closed".to_owned())
+			None => Err("Database is closed".to_owned())
 		}
 	}
 
 
 	/// Commit transaction to database.
 	pub fn write(&self, tr: DBTransaction) -> Result<(), String> {
-		match &*self.db.read() {
-			&Some(DBAndColumns { ref db, ref cfs }) => {
+		match *self.db.read() {
+			Some(DBAndColumns { ref db, ref cfs }) => {
 				let batch = WriteBatch::new();
 				let ops = tr.ops;
 				for op in ops {
@@ -393,14 +393,14 @@ impl Database {
 				}
 				db.write_opt(batch, &self.write_opts)
 			},
-			&None => Err("Database is closed".to_owned())
+			None => Err("Database is closed".to_owned())
 		}
 	}
 
 	/// Get value by key.
 	pub fn get(&self, col: Option<u32>, key: &[u8]) -> Result<Option<Bytes>, String> {
-		match &*self.db.read() {
-			&Some(DBAndColumns { ref db, ref cfs }) => {
+		match *self.db.read() {
+			Some(DBAndColumns { ref db, ref cfs }) => {
 				let overlay = &self.overlay.read()[Self::to_overlay_column(col)];
 				match overlay.get(key) {
 					Some(&KeyState::Insert(ref value)) | Some(&KeyState::InsertCompressed(ref value)) => Ok(Some(value.clone())),
@@ -412,15 +412,15 @@ impl Database {
 					},
 				}
 			},
-			&None => Ok(None),
+			None => Ok(None),
 		}
 	}
 
 	/// Get value by partial key. Prefix size should match configured prefix size. Only searches flushed values.
 	// TODO: support prefix seek for unflushed data
 	pub fn get_by_prefix(&self, col: Option<u32>, prefix: &[u8]) -> Option<Box<[u8]>> {
-		match &*self.db.read() {
-			&Some(DBAndColumns { ref db, ref cfs }) => {
+		match *self.db.read() {
+			Some(DBAndColumns { ref db, ref cfs }) => {
 				let mut iter = col.map_or_else(|| db.iterator(IteratorMode::From(prefix, Direction::Forward)),
 					|c| db.iterator_cf(cfs[c as usize], IteratorMode::From(prefix, Direction::Forward)).unwrap());
 				match iter.next() {
@@ -429,19 +429,19 @@ impl Database {
 					_ => None
 				}
 			},
-			&None => None,
+			None => None,
 		}
 	}
 
 	/// Get database iterator for flushed data.
 	pub fn iter(&self, col: Option<u32>) -> DatabaseIterator {
 		//TODO: iterate over overlay
-		match &*self.db.read() {
-			&Some(DBAndColumns { ref db, ref cfs }) => {
+		match *self.db.read() {
+			Some(DBAndColumns { ref db, ref cfs }) => {
 				col.map_or_else(|| DatabaseIterator { iter: db.iterator(IteratorMode::Start) },
 					|c| DatabaseIterator { iter: db.iterator_cf(cfs[c as usize], IteratorMode::Start).unwrap() })
 			},
-			&None => panic!("Not supported yet") //TODO: return an empty iterator or change return type
+			None => panic!("Not supported yet") //TODO: return an empty iterator or change return type
 		}
 	}
 
diff --git a/util/src/lib.rs b/util/src/lib.rs
index 57ea9c152..17c2f5151 100644
--- a/util/src/lib.rs
+++ b/util/src/lib.rs
@@ -99,7 +99,7 @@ extern crate time;
 extern crate ethcore_devtools as devtools;
 extern crate libc;
 extern crate target_info;
-extern crate bigint;
+extern crate ethcore_bigint as bigint;
 extern crate parking_lot;
 extern crate ansi_term;
 extern crate tiny_keccak;
diff --git a/util/src/trie/recorder.rs b/util/src/trie/recorder.rs
index a48f277b4..2f1d926f0 100644
--- a/util/src/trie/recorder.rs
+++ b/util/src/trie/recorder.rs
@@ -63,6 +63,12 @@ pub struct BasicRecorder {
 	min_depth: u32,
 }
 
+impl Default for BasicRecorder {
+	fn default() -> Self {
+		BasicRecorder::new()
+	}
+}
+
 impl BasicRecorder {
 	/// Create a new `BasicRecorder` which records all given nodes.
 	#[inline]
@@ -233,4 +239,4 @@ mod tests {
 			]
 		]);
 	}
-}
\ No newline at end of file
+}
diff --git a/util/src/trie/triedb.rs b/util/src/trie/triedb.rs
index 88a3399e7..99ef1f118 100644
--- a/util/src/trie/triedb.rs
+++ b/util/src/trie/triedb.rs
@@ -128,7 +128,7 @@ impl<'db> TrieDB<'db> {
 	}
 
 	/// Get the root node's RLP.
-	fn root_node<'a, R: 'a + Recorder>(&self, r: &'a mut R) -> super::Result<Node> {
+	fn root_node<R: Recorder>(&self, r: &mut R) -> super::Result<Node> {
 		self.root_data(r).map(Node::decoded)
 	}