diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4a7ba9d44..94ac69d2c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,7 +8,6 @@ variables:
   RUST_BACKTRACE: "1"
   RUSTFLAGS: ""
   CARGOFLAGS: ""
-  NIGHTLY: "nigtly"
 cache:
   key: "$CI_BUILD_STAGE/$CI_BUILD_REF_NAME"
   untracked: true
@@ -21,7 +20,7 @@ linux-stable:
     - stable
     - triggers
   script:
-    - cargo build --release $CARGOFLAGS
+    - cargo build -j $(nproc) --release $CARGOFLAGS
     - strip target/release/parity
     - md5sum target/release/parity > parity.md5
     - sh scripts/deb-build.sh amd64
@@ -53,7 +52,7 @@ linux-beta:
     - stable
     - triggers
   script:
-    - cargo build --release $CARGOFLAGS
+    - cargo build -j $(nproc) --release $CARGOFLAGS
     - strip target/release/parity
   tags:
     - rust
@@ -72,7 +71,7 @@ linux-nightly:
     - stable
     - triggers
   script:
-    - cargo build --release $CARGOFLAGS
+    - cargo build -j $(nproc) --release $CARGOFLAGS
     - strip target/release/parity
   tags:
     - rust
@@ -93,7 +92,7 @@ linux-centos:
   script:
     - export CXX="g++"
     - export CC="gcc"
-    - cargo build --release $CARGOFLAGS
+    - cargo build -j $(nproc) --release $CARGOFLAGS
     - strip target/release/parity
     - md5sum target/release/parity > parity.md5
     - aws configure set aws_access_key_id $s3_key
@@ -120,7 +119,7 @@ linux-i686:
   script:
     - export HOST_CC=gcc
     - export HOST_CXX=g++
-    - cargo build --target i686-unknown-linux-gnu --release $CARGOFLAGS
+    - cargo build -j $(nproc) --target i686-unknown-linux-gnu --release $CARGOFLAGS
     - strip target/i686-unknown-linux-gnu/release/parity
     - md5sum target/i686-unknown-linux-gnu/release/parity > parity.md5
     - sh scripts/deb-build.sh i386
@@ -162,7 +161,7 @@ linux-armv7:
     - echo "[target.armv7-unknown-linux-gnueabihf]" >> .cargo/config
     - echo "linker= \"arm-linux-gnueabihf-gcc\"" >> .cargo/config
     - cat .cargo/config
-    - cargo build --target armv7-unknown-linux-gnueabihf --release $CARGOFLAGS
+    - cargo build -j $(nproc) --target armv7-unknown-linux-gnueabihf --release $CARGOFLAGS
     - arm-linux-gnueabihf-strip target/armv7-unknown-linux-gnueabihf/release/parity
     - md5sum target/armv7-unknown-linux-gnueabihf/release/parity > parity.md5
     - sh scripts/deb-build.sh armhf
@@ -204,7 +203,7 @@ linux-arm:
     - 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 $CARGOFLAGS
+    - cargo build -j $(nproc) --target arm-unknown-linux-gnueabihf --release $CARGOFLAGS
     - arm-linux-gnueabihf-strip target/arm-unknown-linux-gnueabihf/release/parity
     - md5sum target/arm-unknown-linux-gnueabihf/release/parity > parity.md5
     - sh scripts/deb-build.sh armhf
@@ -232,9 +231,9 @@ linux-armv6:
   stage: build
   image: ethcore/rust-armv6:latest
   only:
-    - beta
-    - tags
-    - stable
+#    - beta
+#    - tags
+#    - stable
     - triggers
   script:
     - export CC=arm-linux-gnueabi-gcc
@@ -246,7 +245,7 @@ linux-armv6:
     - 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 $CARGOFLAGS
+    - cargo build -j $(nproc) --target arm-unknown-linux-gnueabi --release $CARGOFLAGS
     - arm-linux-gnueabi-strip target/arm-unknown-linux-gnueabi/release/parity
     - md5sum target/arm-unknown-linux-gnueabi/release/parity > parity.md5
     - aws configure set aws_access_key_id $s3_key
@@ -281,7 +280,7 @@ linux-aarch64:
     - 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 $CARGOFLAGS
+    - cargo build -j $(nproc) --target aarch64-unknown-linux-gnu --release $CARGOFLAGS
     - aarch64-linux-gnu-strip target/aarch64-unknown-linux-gnu/release/parity
     - md5sum target/aarch64-unknown-linux-gnu/release/parity > parity.md5
     - sh scripts/deb-build.sh arm64
@@ -305,41 +304,6 @@ linux-aarch64:
     - target/aarch64-unknown-linux-gnu/release/parity
     name: "aarch64-unknown-linux-gnu_parity"
   allow_failure: true
-#linux-alpine:
-#  stage: build
-#  image: ethcore/rust-alpine:latest
-#  only:
-#    - beta
-#    - tags
-#    - stable
-#    - triggers
-#  script:
-#    - export HOST_CC=gcc
-#    - export HOST_CXX=g++
-#    - cargo build --release $CARGOFLAGS
-#    - strip target/release/parity
-#    - md5sum target/release/parity > parity.md5
-#    - sh scripts/deb-build.sh arm64
-#    - cp target/aarch64-unknown-linux-gnu/release/parity deb/usr/bin/parity
-#    - export VER=$(grep -m 1 version Cargo.toml | awk '{print $3}' | tr -d '"' | tr -d "\n")
-#    - dpkg-deb -b deb "parity_"$VER"_arm64.deb"
-#    - md5sum "parity_"$VER"_arm64.deb" > "parity_"$VER"_arm64.deb.md5"
-#    - aws configure set aws_access_key_id $s3_key
-#    - aws configure set aws_secret_access_key $s3_secret
-#    - if [[ $CI_BUILD_REF_NAME =~ ^(master|beta|stable)$ ]]; then export S3_BUCKET=builds-parity-published; else export S3_BUCKET=builds-parity; fi
-#    - aws s3 rm --recursive s3://$S3_BUCKET/$CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu
-#    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/parity --body target/aarch64-unknown-linux-gnu/release/parity
-#    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/parity.md5 --body parity.md5
-#    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/"parity_"$VER"_arm64.deb" --body "parity_"$VER"_arm64.deb"
-#    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/"parity_"$VER"_arm64.deb.md5" --body "parity_"$VER"_arm64.deb.md5"
-#  tags:
-#    - rust
-#    - rust-alpine
-#  artifacts:
-#    paths:
-#    - target/aarch64-unknown-linux-gnu/release/parity
-#    name: "aarch64-unknown-linux-gnu_parity"
-#  allow_failure: true
 darwin:
   stage: build
   only:
@@ -348,8 +312,8 @@ darwin:
     - stable
     - triggers
   script:
-    - cargo build --release -p ethstore $CARGOFLAGS
-    - cargo build --release $CARGOFLAGS
+    - cargo build -j 8 --release -p ethstore #$CARGOFLAGS
+    - cargo build -j 8 --release #$CARGOFLAGS
     - rm -rf parity.md5
     - md5sum target/release/parity > parity.md5
     - packagesbuild -v mac/Parity.pkgproj
@@ -386,7 +350,7 @@ windows:
     - set RUST_BACKTRACE=1
     - set RUSTFLAGS=%RUSTFLAGS% 
     - rustup default stable-x86_64-pc-windows-msvc
-    - cargo build --release %CARGOFLAGS%
+    - cargo build -j 8 --release #%CARGOFLAGS%
     - curl -sL --url "https://github.com/ethcore/win-build/raw/master/SimpleFC.dll" -o nsis\SimpleFC.dll
     - curl -sL --url "https://github.com/ethcore/win-build/raw/master/vc_redist.x64.exe" -o nsis\vc_redist.x64.exe
     - signtool sign /f %keyfile% /p %certpass% target\release\parity.exe
@@ -449,7 +413,7 @@ test-windows:
     - git submodule update --init --recursive
   script:
     - set RUST_BACKTRACE=1
-    - cargo test --features json-tests -p rlp -p ethash -p ethcore -p ethcore-bigint -p ethcore-dapps -p ethcore-rpc -p ethcore-signer -p ethcore-util -p ethcore-network -p ethcore-io -p ethkey -p ethstore -p ethsync -p ethcore-ipc -p ethcore-ipc-tests -p ethcore-ipc-nano -p parity %CARGOFLAGS% --verbose --release
+    - cargo -j 8 test --features json-tests -p rlp -p ethash -p ethcore -p ethcore-bigint -p ethcore-dapps -p ethcore-rpc -p ethcore-signer -p ethcore-util -p ethcore-network -p ethcore-io -p ethkey -p ethstore -p ethsync -p ethcore-ipc -p ethcore-ipc-tests -p ethcore-ipc-nano -p parity %CARGOFLAGS% --verbose --release
   tags:
     - rust-windows
   allow_failure: true
diff --git a/Cargo.lock b/Cargo.lock
index a97bb776e..4d1bba344 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,7 +3,7 @@ name = "parity"
 version = "1.5.0"
 dependencies = [
  "ansi_term 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "clippy 0.0.96 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.103 (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)",
@@ -146,15 +146,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "clippy"
-version = "0.0.96"
+version = "0.0.103"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "clippy_lints 0.0.96 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy_lints 0.0.103 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "clippy_lints"
-version = "0.0.96"
+version = "0.0.103"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "matches 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -224,7 +224,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "elastic-array"
 version = "0.6.0"
-source = "git+https://github.com/ethcore/elastic-array#70e4012e691b732c7c4cb04e9232799e6aa268bc"
+source = "git+https://github.com/ethcore/elastic-array#346f1ba5982576dab9d0b8fa178b50e1db0a21cd"
 dependencies = [
  "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -280,7 +280,7 @@ 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)",
  "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "clippy 0.0.96 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.103 (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",
@@ -333,7 +333,7 @@ dependencies = [
 name = "ethcore-dapps"
 version = "1.5.0"
 dependencies = [
- "clippy 0.0.96 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.103 (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-hash-fetch 1.5.0",
@@ -490,7 +490,7 @@ dependencies = [
 name = "ethcore-rpc"
 version = "1.5.0"
 dependencies = [
- "clippy 0.0.96 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.103 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethash 1.4.0",
  "ethcore 1.5.0",
  "ethcore-devtools 1.4.0",
@@ -520,7 +520,7 @@ dependencies = [
 name = "ethcore-signer"
 version = "1.5.0"
 dependencies = [
- "clippy 0.0.96 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.103 (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 1.5.0",
@@ -559,7 +559,7 @@ version = "1.5.0"
 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)",
- "clippy 0.0.96 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.103 (registry+https://github.com/rust-lang/crates.io-index)",
  "elastic-array 0.6.0 (git+https://github.com/ethcore/elastic-array)",
  "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)",
@@ -649,7 +649,7 @@ dependencies = [
 name = "ethsync"
 version = "1.5.0"
 dependencies = [
- "clippy 0.0.96 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.103 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethcore 1.5.0",
  "ethcore-io 1.5.0",
@@ -1263,7 +1263,7 @@ dependencies = [
 [[package]]
 name = "parity-ui-precompiled"
 version = "1.4.0"
-source = "git+https://github.com/ethcore/js-precompiled.git#cb6836dddf8c9951e056283dcd9e105e97923d07"
+source = "git+https://github.com/ethcore/js-precompiled.git#b3f0e3ddedf9afee35ca8384a74158df572973c7"
 dependencies = [
  "parity-dapps-glue 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -2005,8 +2005,8 @@ 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 0.0.96 (registry+https://github.com/rust-lang/crates.io-index)" = "6eacf01b0aad84a0817703498f72d252df7c0faf6a5b86d0be4265f1829e459f"
-"checksum clippy_lints 0.0.96 (registry+https://github.com/rust-lang/crates.io-index)" = "a49960c9aab544ce86b004dcb61620e8b898fea5fc0f697a028f460f48221ed6"
+"checksum clippy 0.0.103 (registry+https://github.com/rust-lang/crates.io-index)" = "5b4fabf979ddf6419a313c1c0ada4a5b95cfd2049c56e8418d622d27b4b6ff32"
+"checksum clippy_lints 0.0.103 (registry+https://github.com/rust-lang/crates.io-index)" = "ce96ec05bfe018a0d5d43da115e54850ea2217981ff0f2e462780ab9d594651a"
 "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>"
diff --git a/Cargo.toml b/Cargo.toml
index a8d7ba794..3808cce95 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -47,7 +47,7 @@ ethcore-hash-fetch = { path = "ethcore/hash-fetch" }
 rlp = { path = "util/rlp" }
 ethcore-stratum = { path = "stratum" }
 ethcore-dapps = { path = "dapps", optional = true }
-clippy = { version = "0.0.96", optional = true}
+clippy = { version = "0.0.103", optional = true}
 
 [target.'cfg(windows)'.dependencies]
 winapi = "0.2"
diff --git a/dapps/Cargo.toml b/dapps/Cargo.toml
index 15e537820..6be30884a 100644
--- a/dapps/Cargo.toml
+++ b/dapps/Cargo.toml
@@ -34,7 +34,7 @@ ethcore-hash-fetch = { path = "../ethcore/hash-fetch" }
 fetch = { path = "../util/fetch" }
 parity-ui = { path = "./ui" }
 
-clippy = { version = "0.0.96", optional = true}
+clippy = { version = "0.0.103", optional = true}
 
 [build-dependencies]
 serde_codegen = { version = "0.8", optional = true }
diff --git a/db/Cargo.toml b/db/Cargo.toml
index 27eadef4a..2b4a19892 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 = "0.0.96", optional = true}
+clippy = { version = "0.0.103", optional = true}
 ethcore-devtools = { path = "../devtools" }
 ethcore-ipc = { path = "../ipc/rpc" }
 rocksdb = { git = "https://github.com/ethcore/rust-rocksdb" }
diff --git a/ethcore/Cargo.toml b/ethcore/Cargo.toml
index 48fce064a..bd87c422f 100644
--- a/ethcore/Cargo.toml
+++ b/ethcore/Cargo.toml
@@ -29,7 +29,7 @@ byteorder = "0.5"
 transient-hashmap = "0.1"
 linked-hash-map = "0.3.0"
 evmjit = { path = "../evmjit", optional = true }
-clippy = { version = "0.0.96", optional = true}
+clippy = { version = "0.0.103", optional = true}
 ethash = { path = "../ethash" }
 ethcore-util = { path = "../util" }
 ethcore-io = { path = "../util/io" }
diff --git a/ethcore/src/account_db.rs b/ethcore/src/account_db.rs
index 0761b7fba..63524a442 100644
--- a/ethcore/src/account_db.rs
+++ b/ethcore/src/account_db.rs
@@ -121,10 +121,6 @@ impl<'db> HashDB for AccountDB<'db>{
 	fn remove(&mut self, _key: &H256) {
 		unimplemented!()
 	}
-
-	fn get_aux(&self, hash: &[u8]) -> Option<DBValue> {
-		self.db.get_aux(hash)
-	}
 }
 
 /// DB backend wrapper for Account trie
@@ -197,18 +193,6 @@ impl<'db> HashDB for AccountDBMut<'db>{
 		let key = combine_key(&self.address_hash, key);
 		self.db.remove(&key)
 	}
-
-	fn insert_aux(&mut self, hash: Vec<u8>, value: Vec<u8>) {
-		self.db.insert_aux(hash, value);
-	}
-
-	fn get_aux(&self, hash: &[u8]) -> Option<DBValue> {
-		self.db.get_aux(hash)
-	}
-
-	fn remove_aux(&mut self, hash: &[u8]) {
-		self.db.remove_aux(hash);
-	}
 }
 
 struct Wrapping<'db>(&'db HashDB);
diff --git a/ethcore/src/block.rs b/ethcore/src/block.rs
index 54c2a7a02..bcbceb9aa 100644
--- a/ethcore/src/block.rs
+++ b/ethcore/src/block.rs
@@ -594,9 +594,9 @@ mod tests {
 	use factory::Factories;
 	use state_db::StateDB;
 	use views::BlockView;
-	use util::Address;
+	use util::{Address, TrieFactory};
 	use util::hash::FixedHash;
-
+	use util::trie::TrieSpec;
 	use std::sync::Arc;
 
 	/// Enact the block given by `block_bytes` using `engine` on the database `db` with given `parent` block header
@@ -637,7 +637,7 @@ mod tests {
 		let genesis_header = spec.genesis_header();
 		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(&mut db).unwrap();
+		spec.ensure_db_good(&mut db, &TrieFactory::new(TrieSpec::Secure)).unwrap();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
 		let b = OpenBlock::new(&*spec.engine, Default::default(), false, db, &genesis_header, last_hashes, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let b = b.close_and_lock();
@@ -653,7 +653,7 @@ mod tests {
 
 		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(&mut db).unwrap();
+		spec.ensure_db_good(&mut db, &TrieFactory::new(TrieSpec::Secure)).unwrap();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
 		let b = OpenBlock::new(engine, Default::default(), false, db, &genesis_header, last_hashes.clone(), Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap()
 			.close_and_lock().seal(engine, vec![]).unwrap();
@@ -662,7 +662,7 @@ mod tests {
 
 		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(&mut db).unwrap();
+		spec.ensure_db_good(&mut db, &TrieFactory::new(TrieSpec::Secure)).unwrap();
 		let e = enact_and_seal(&orig_bytes, engine, false, db, &genesis_header, last_hashes, Default::default()).unwrap();
 
 		assert_eq!(e.rlp_bytes(), orig_bytes);
@@ -681,7 +681,7 @@ mod tests {
 
 		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(&mut db).unwrap();
+		spec.ensure_db_good(&mut db, &TrieFactory::new(TrieSpec::Secure)).unwrap();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
 		let mut open_block = OpenBlock::new(engine, Default::default(), false, db, &genesis_header, last_hashes.clone(), Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let mut uncle1_header = Header::new();
@@ -697,7 +697,7 @@ mod tests {
 
 		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(&mut db).unwrap();
+		spec.ensure_db_good(&mut db, &TrieFactory::new(TrieSpec::Secure)).unwrap();
 		let e = enact_and_seal(&orig_bytes, engine, false, db, &genesis_header, last_hashes, Default::default()).unwrap();
 
 		let bytes = e.rlp_bytes();
diff --git a/ethcore/src/client/client.rs b/ethcore/src/client/client.rs
index 0e0b292f9..85ec05b03 100644
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@@ -22,7 +22,7 @@ use std::time::{Instant};
 use time::precise_time_ns;
 
 // util
-use util::{Bytes, PerfTimer, Itertools, Mutex, RwLock};
+use util::{Bytes, PerfTimer, Itertools, Mutex, RwLock, Hashable};
 use util::{journaldb, TrieFactory, Trie};
 use util::trie::TrieSpec;
 use util::{U256, H256, Address, H2048, Uint, FixedHash};
@@ -172,9 +172,10 @@ impl Client {
 			false => TrieSpec::Secure,
 		};
 
+		let trie_factory = TrieFactory::new(trie_spec);
 		let journal_db = journaldb::new(db.clone(), config.pruning, ::db::COL_STATE);
 		let mut state_db = StateDB::new(journal_db, config.state_cache_size);
-		if state_db.journal_db().is_empty() && try!(spec.ensure_db_good(&mut state_db)) {
+		if state_db.journal_db().is_empty() && try!(spec.ensure_db_good(&mut state_db, &trie_factory)) {
 			let mut batch = DBTransaction::new(&db);
 			try!(state_db.journal_under(&mut batch, 0, &spec.genesis_header().hash()));
 			try!(db.write(batch).map_err(ClientError::Database));
@@ -216,7 +217,7 @@ impl Client {
 
 		let factories = Factories {
 			vm: EvmFactory::new(config.vm_type.clone(), config.jump_table_size),
-			trie: TrieFactory::new(trie_spec),
+			trie: trie_factory,
 			accountdb: Default::default(),
 		};
 
@@ -869,8 +870,8 @@ impl BlockChainClient for Client {
 	}
 
 	fn keep_alive(&self) {
-		let should_wake = match &*self.mode.lock() {
-			&Mode::Dark(..) | &Mode::Passive(..) => true,
+		let should_wake = match *self.mode.lock() {
+			Mode::Dark(..) | Mode::Passive(..) => true,
 			_ => false,
 		};
 		if should_wake {
@@ -952,6 +953,10 @@ impl BlockChainClient for Client {
 		self.state_at(id).map(|s| s.nonce(address))
 	}
 
+	fn storage_root(&self, address: &Address, id: BlockID) -> Option<H256> {
+		self.state_at(id).and_then(|s| s.storage_root(address))
+	}
+
 	fn block_hash(&self, id: BlockID) -> Option<H256> {
 		let chain = self.chain.read();
 		Self::block_hash(&chain, id)
@@ -969,7 +974,7 @@ impl BlockChainClient for Client {
 		self.state_at(id).map(|s| s.storage_at(address, position))
 	}
 
-	fn list_accounts(&self, id: BlockID) -> Option<Vec<Address>> {
+	fn list_accounts(&self, id: BlockID, after: Option<&Address>, count: u64) -> Option<Vec<Address>> {
 		if !self.factories.trie.is_fat() {
 			trace!(target: "fatdb", "list_accounts: Not a fat DB");
 			return None;
@@ -989,18 +994,68 @@ impl BlockChainClient for Client {
 			}
 		};
 
-		let iter = match trie.iter() {
+		let mut iter = match trie.iter() {
 			Ok(iter) => iter,
 			_ => return None,
 		};
 
+		if let Some(after) = after {
+			if let Err(e) = iter.seek(after) {
+				trace!(target: "fatdb", "list_accounts: Couldn't seek the DB: {:?}", e);
+			}
+		}
+
 		let accounts = iter.filter_map(|item| {
 			item.ok().map(|(addr, _)| Address::from_slice(&addr))
-		}).collect();
+		}).take(count as usize).collect();
 
 		Some(accounts)
 	}
 
+	fn list_storage(&self, id: BlockID, account: &Address, after: Option<&H256>, count: u64) -> Option<Vec<H256>> {
+		if !self.factories.trie.is_fat() {
+			trace!(target: "fatdb", "list_stroage: Not a fat DB");
+			return None;
+		}
+
+		let state = match self.state_at(id) {
+			Some(state) => state,
+			_ => return None,
+		};
+
+		let root = match state.storage_root(account) {
+			Some(root) => root,
+			_ => return None,
+		};
+
+		let (_, db) = state.drop();
+		let account_db = self.factories.accountdb.readonly(db.as_hashdb(), account.sha3());
+		let trie = match self.factories.trie.readonly(account_db.as_hashdb(), &root) {
+			Ok(trie) => trie,
+			_ => {
+				trace!(target: "fatdb", "list_storage: Couldn't open the DB");
+				return None;
+			}
+		};
+
+		let mut iter = match trie.iter() {
+			Ok(iter) => iter,
+			_ => return None,
+		};
+
+		if let Some(after) = after {
+			if let Err(e) = iter.seek(after) {
+				trace!(target: "fatdb", "list_accounts: Couldn't seek the DB: {:?}", e);
+			}
+		}
+
+		let keys = iter.filter_map(|item| {
+			item.ok().map(|(key, _)| H256::from_slice(&key))
+		}).take(count as usize).collect();
+
+		Some(keys)
+	}
+
 	fn transaction(&self, id: TransactionID) -> Option<LocalizedTransaction> {
 		self.transaction_address(id).and_then(|address| self.chain.read().transaction(&address))
 	}
diff --git a/ethcore/src/client/test_client.rs b/ethcore/src/client/test_client.rs
index 84ed25b37..c03b5920b 100644
--- a/ethcore/src/client/test_client.rs
+++ b/ethcore/src/client/test_client.rs
@@ -333,7 +333,7 @@ impl MiningBlockChainClient for TestBlockChainClient {
 		let genesis_header = self.spec.genesis_header();
 		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		self.spec.ensure_db_good(&mut db).unwrap();
+		self.spec.ensure_db_good(&mut db, &TrieFactory::default()).unwrap();
 
 		let last_hashes = vec![genesis_header.hash()];
 		let mut open_block = OpenBlock::new(
@@ -385,6 +385,10 @@ impl BlockChainClient for TestBlockChainClient {
 		}
 	}
 
+	fn storage_root(&self, _address: &Address, _id: BlockID) -> Option<H256> {
+		None
+	}
+
 	fn latest_nonce(&self, address: &Address) -> U256 {
 		self.nonce(address, BlockID::Latest).unwrap()
 	}
@@ -416,10 +420,13 @@ impl BlockChainClient for TestBlockChainClient {
 		}
 	}
 
-	fn list_accounts(&self, _id: BlockID) -> Option<Vec<Address>> {
+	fn list_accounts(&self, _id: BlockID, _after: Option<&Address>, _count: u64) -> Option<Vec<Address>> {
 		None
 	}
 
+	fn list_storage(&self, _id: BlockID, _account: &Address, _after: Option<&H256>, _count: u64) -> Option<Vec<H256>> {
+		None
+	}
 	fn transaction(&self, _id: TransactionID) -> Option<LocalizedTransaction> {
 		None	// Simple default.
 	}
diff --git a/ethcore/src/client/traits.rs b/ethcore/src/client/traits.rs
index 67092e986..6d774e250 100644
--- a/ethcore/src/client/traits.rs
+++ b/ethcore/src/client/traits.rs
@@ -68,6 +68,10 @@ pub trait BlockChainClient : Sync + Send {
 	/// May not fail on BlockID::Latest.
 	fn nonce(&self, address: &Address, id: BlockID) -> Option<U256>;
 
+	/// Attempt to get address storage root at given block.
+	/// May not fail on BlockID::Latest.
+	fn storage_root(&self, address: &Address, id: BlockID) -> Option<H256>;
+
 	/// Get address nonce at the latest block's state.
 	fn latest_nonce(&self, address: &Address) -> U256 {
 		self.nonce(address, BlockID::Latest)
@@ -114,7 +118,12 @@ pub trait BlockChainClient : Sync + Send {
 	}
 
 	/// Get a list of all accounts in the block `id`, if fat DB is in operation, otherwise `None`.
-	fn list_accounts(&self, id: BlockID) -> Option<Vec<Address>>;
+	/// If `after` is set the list starts with the following item.
+	fn list_accounts(&self, id: BlockID, after: Option<&Address>, count: u64) -> Option<Vec<Address>>;
+
+	/// Get a list of all storage keys in the block `id`, if fat DB is in operation, otherwise `None`.
+	/// If `after` is set the list starts with the following item.
+	fn list_storage(&self, id: BlockID, account: &Address, after: Option<&H256>, count: u64) -> Option<Vec<H256>>;
 
 	/// Get transaction with given hash.
 	fn transaction(&self, id: TransactionID) -> Option<LocalizedTransaction>;
diff --git a/ethcore/src/engines/authority_round.rs b/ethcore/src/engines/authority_round.rs
index 830fcf9c8..6c1d0a409 100644
--- a/ethcore/src/engines/authority_round.rs
+++ b/ethcore/src/engines/authority_round.rs
@@ -124,7 +124,7 @@ impl AuthorityRound {
 	}
 
 	fn step_proposer(&self, step: usize) -> &Address {
-		let ref p = self.our_params;
+		let p = &self.our_params;
 		p.authorities.get(step % p.authority_n).expect("There are authority_n authorities; taking number modulo authority_n gives number in authority_n range; qed")
 	}
 
@@ -211,7 +211,7 @@ impl Engine for AuthorityRound {
 	fn on_close_block(&self, _block: &mut ExecutedBlock) {}
 
 	fn is_sealer(&self, author: &Address) -> Option<bool> {
-		let ref p = self.our_params;
+		let p = &self.our_params;
 		Some(p.authorities.contains(author))
 	}
 
@@ -279,7 +279,7 @@ impl Engine for AuthorityRound {
 
 		let step = try!(header_step(header));
 		// Check if parent is from a previous step.
-		if step == try!(header_step(parent)) { 
+		if step == try!(header_step(parent)) {
 			trace!(target: "poa", "Multiple blocks proposed for step {}.", step);
 			try!(Err(BlockError::DoubleVote(header.author().clone())));
 		}
@@ -315,6 +315,7 @@ impl Engine for AuthorityRound {
 #[cfg(test)]
 mod tests {
 	use util::*;
+	use util::trie::TrieSpec;
 	use env_info::EnvInfo;
 	use header::Header;
 	use error::{Error, BlockError};
@@ -384,9 +385,9 @@ mod tests {
 		let engine = &*spec.engine;
 		let genesis_header = spec.genesis_header();
 		let mut db1 = get_temp_state_db().take();
-		spec.ensure_db_good(&mut db1).unwrap();
+		spec.ensure_db_good(&mut db1, &TrieFactory::new(TrieSpec::Secure)).unwrap();
 		let mut db2 = get_temp_state_db().take();
-		spec.ensure_db_good(&mut db2).unwrap();
+		spec.ensure_db_good(&mut db2, &TrieFactory::new(TrieSpec::Secure)).unwrap();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
 		let b1 = OpenBlock::new(engine, Default::default(), false, db1, &genesis_header, last_hashes.clone(), addr1, (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let b1 = b1.close_and_lock();
diff --git a/ethcore/src/engines/basic_authority.rs b/ethcore/src/engines/basic_authority.rs
index 23a97967c..fb2f9bde6 100644
--- a/ethcore/src/engines/basic_authority.rs
+++ b/ethcore/src/engines/basic_authority.rs
@@ -184,6 +184,7 @@ impl Engine for BasicAuthority {
 #[cfg(test)]
 mod tests {
 	use util::*;
+	use util::trie::TrieSpec;
 	use block::*;
 	use env_info::EnvInfo;
 	use error::{BlockError, Error};
@@ -256,7 +257,7 @@ mod tests {
 		let genesis_header = spec.genesis_header();
 		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(&mut db).unwrap();
+		spec.ensure_db_good(&mut db, &TrieFactory::new(TrieSpec::Secure)).unwrap();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
 		let b = OpenBlock::new(engine, Default::default(), false, db, &genesis_header, last_hashes, addr, (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let b = b.close_and_lock();
diff --git a/ethcore/src/engines/instant_seal.rs b/ethcore/src/engines/instant_seal.rs
index 3dc78d1a2..f50f7344b 100644
--- a/ethcore/src/engines/instant_seal.rs
+++ b/ethcore/src/engines/instant_seal.rs
@@ -68,6 +68,7 @@ impl Engine for InstantSeal {
 #[cfg(test)]
 mod tests {
 	use util::*;
+	use util::trie::TrieSpec;
 	use tests::helpers::*;
 	use account_provider::AccountProvider;
 	use spec::Spec;
@@ -84,7 +85,7 @@ mod tests {
 		let genesis_header = spec.genesis_header();
 		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(&mut db).unwrap();
+		spec.ensure_db_good(&mut db, &TrieFactory::new(TrieSpec::Secure)).unwrap();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
 		let b = OpenBlock::new(engine, Default::default(), false, db, &genesis_header, last_hashes, addr, (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let b = b.close_and_lock();
diff --git a/ethcore/src/ethereum/ethash.rs b/ethcore/src/ethereum/ethash.rs
index de2a85942..38a1df525 100644
--- a/ethcore/src/ethereum/ethash.rs
+++ b/ethcore/src/ethereum/ethash.rs
@@ -422,6 +422,7 @@ impl Header {
 #[cfg(test)]
 mod tests {
 	use util::*;
+	use util::trie::TrieSpec;
 	use block::*;
 	use tests::helpers::*;
 	use env_info::EnvInfo;
@@ -438,7 +439,7 @@ mod tests {
 		let genesis_header = spec.genesis_header();
 		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(&mut db).unwrap();
+		spec.ensure_db_good(&mut db, &TrieFactory::new(TrieSpec::Secure)).unwrap();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
 		let b = OpenBlock::new(engine, Default::default(), false, db, &genesis_header, last_hashes, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let b = b.close();
@@ -452,7 +453,7 @@ mod tests {
 		let genesis_header = spec.genesis_header();
 		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(&mut db).unwrap();
+		spec.ensure_db_good(&mut db, &TrieFactory::new(TrieSpec::Secure)).unwrap();
 		let last_hashes = Arc::new(vec![genesis_header.hash()]);
 		let mut b = OpenBlock::new(engine, Default::default(), false, db, &genesis_header, last_hashes, Address::zero(), (3141562.into(), 31415620.into()), vec![]).unwrap();
 		let mut uncle = Header::new();
diff --git a/ethcore/src/ethereum/mod.rs b/ethcore/src/ethereum/mod.rs
index e236924ad..3916e5ccc 100644
--- a/ethcore/src/ethereum/mod.rs
+++ b/ethcore/src/ethereum/mod.rs
@@ -72,6 +72,7 @@ pub fn new_morden() -> Spec { load(include_bytes!("../../res/ethereum/morden.jso
 #[cfg(test)]
 mod tests {
 	use util::*;
+	use util::trie::TrieSpec;
 	use state::*;
 	use super::*;
 	use tests::helpers::*;
@@ -84,7 +85,7 @@ mod tests {
 		let genesis_header = spec.genesis_header();
 		let mut db_result = get_temp_state_db();
 		let mut db = db_result.take();
-		spec.ensure_db_good(&mut db).unwrap();
+		spec.ensure_db_good(&mut db, &TrieFactory::new(TrieSpec::Secure)).unwrap();
 		let s = State::from_existing(db, genesis_header.state_root().clone(), engine.account_start_nonce(), Default::default()).unwrap();
 		assert_eq!(s.balance(&"0000000000000000000000000000000000000001".into()), 1u64.into());
 		assert_eq!(s.balance(&"0000000000000000000000000000000000000002".into()), 1u64.into());
diff --git a/ethcore/src/evm/interpreter/gasometer.rs b/ethcore/src/evm/interpreter/gasometer.rs
index beaaadac5..886120880 100644
--- a/ethcore/src/evm/interpreter/gasometer.rs
+++ b/ethcore/src/evm/interpreter/gasometer.rs
@@ -197,19 +197,17 @@ impl<Gas: CostType> Gasometer<Gas> {
 				let address = u256_to_address(stack.peek(1));
 				let is_value_transfer = !stack.peek(2).is_zero();
 
-				if instruction == instructions::CALL {
-					if (
-						!schedule.no_empty && !ext.exists(&address)
-					) || (
-						schedule.no_empty && is_value_transfer && !ext.exists_and_not_null(&address)
-					) {
-						gas = overflowing!(gas.overflow_add(schedule.call_new_account_gas.into()));
-					}
-				};
+				if instruction == instructions::CALL && (
+					(!schedule.no_empty && !ext.exists(&address))
+					||
+					(schedule.no_empty && is_value_transfer && !ext.exists_and_not_null(&address))
+				) {
+					gas = overflowing!(gas.overflow_add(schedule.call_new_account_gas.into()));
+				}
 
 				if is_value_transfer {
 					gas = overflowing!(gas.overflow_add(schedule.call_value_transfer_gas.into()));
-				};
+				}
 
 				let requested = *stack.peek(0);
 
@@ -347,7 +345,7 @@ fn test_mem_gas_cost() {
 	let result = gasometer.mem_gas_cost(&schedule, current_mem_size, &mem_size);
 
 	// then
-	if let Ok(_) = result {
+	if result.is_ok() {
 		assert!(false, "Should fail with OutOfGas");
 	}
 }
diff --git a/ethcore/src/evm/tests.rs b/ethcore/src/evm/tests.rs
index 7e69c0771..6cfc9a43e 100644
--- a/ethcore/src/evm/tests.rs
+++ b/ethcore/src/evm/tests.rs
@@ -95,7 +95,7 @@ impl Ext for FakeExt {
 	}
 
 	fn exists_and_not_null(&self, address: &Address) -> bool {
-		self.balances.get(address).map_or(false, |b| !b.is_zero()) 
+		self.balances.get(address).map_or(false, |b| !b.is_zero())
 	}
 
 	fn origin_balance(&self) -> U256 {
@@ -103,7 +103,7 @@ impl Ext for FakeExt {
 	}
 
 	fn balance(&self, address: &Address) -> U256 {
-		*self.balances.get(address).unwrap()
+		self.balances[address]
 	}
 
 	fn blockhash(&self, number: &U256) -> H256 {
diff --git a/ethcore/src/executive.rs b/ethcore/src/executive.rs
index 5da105e2f..1dfd987c1 100644
--- a/ethcore/src/executive.rs
+++ b/ethcore/src/executive.rs
@@ -445,7 +445,7 @@ impl<'a> Executive<'a> {
 
 		trace!("exec::finalize: Refunding refund_value={}, sender={}\n", refund_value, sender);
 		// Below: NoEmpty is safe since the sender must already be non-null to have sent this transaction
-		self.state.add_balance(&sender, &refund_value, CleanupMode::NoEmpty);  
+		self.state.add_balance(&sender, &refund_value, CleanupMode::NoEmpty);
 		trace!("exec::finalize: Compensating author: fees_value={}, author={}\n", fees_value, &self.info.author);
 		self.state.add_balance(&self.info.author, &fees_value, substate.to_cleanup_mode(&schedule));
 
@@ -514,9 +514,11 @@ impl<'a> Executive<'a> {
 #[cfg(test)]
 #[allow(dead_code)]
 mod tests {
+	use std::sync::Arc;
 	use ethkey::{Generator, Random};
 	use super::*;
-	use util::*;
+	use util::{H256, U256, U512, Address, Uint, FixedHash, FromHex, FromStr};
+	use util::bytes::BytesRef;
 	use action_params::{ActionParams, ActionValue};
 	use env_info::EnvInfo;
 	use evm::{Factory, VMType};
diff --git a/ethcore/src/miner/miner.rs b/ethcore/src/miner/miner.rs
index 9d4e66918..a543e608d 100644
--- a/ethcore/src/miner/miner.rs
+++ b/ethcore/src/miner/miner.rs
@@ -151,7 +151,7 @@ impl GasPriceCalibrator {
 		if Instant::now() >= self.next_calibration {
 			let usd_per_tx = self.options.usd_per_tx;
 			trace!(target: "miner", "Getting price info");
-			if let Ok(_) = PriceInfo::get(move |price: PriceInfo| {
+			let price_info = PriceInfo::get(move |price: PriceInfo| {
 				trace!(target: "miner", "Price info arrived: {:?}", price);
 				let usd_per_eth = price.ethusd;
 				let wei_per_usd: f32 = 1.0e18 / usd_per_eth;
@@ -159,7 +159,9 @@ impl GasPriceCalibrator {
 				let wei_per_gas: f32 = wei_per_usd * usd_per_tx / gas_per_tx;
 				info!(target: "miner", "Updated conversion rate to Ξ1 = {} ({} wei/gas)", Colour::White.bold().paint(format!("US${}", usd_per_eth)), Colour::Yellow.bold().paint(format!("{}", wei_per_gas)));
 				set_price(U256::from(wei_per_gas as u64));
-			}) {
+			});
+
+			if price_info.is_ok() {
 				self.next_calibration = Instant::now() + self.options.recalibration_period;
 			} else {
 				warn!(target: "miner", "Unable to update Ether price.");
@@ -1139,15 +1141,16 @@ impl MinerService for Miner {
 #[cfg(test)]
 mod tests {
 
+	use std::sync::Arc;
 	use std::time::Duration;
 	use super::super::{MinerService, PrioritizationStrategy};
 	use super::*;
-	use util::*;
+	use block::IsBlock;
+	use util::{U256, Uint, FromHex};
 	use ethkey::{Generator, Random};
 	use client::{BlockChainClient, TestBlockChainClient, EachBlockWith, TransactionImportResult};
 	use header::BlockNumber;
 	use types::transaction::{Transaction, SignedTransaction, Action};
-	use block::*;
 	use spec::Spec;
 	use tests::helpers::{generate_dummy_client};
 
diff --git a/ethcore/src/miner/transaction_queue.rs b/ethcore/src/miner/transaction_queue.rs
index bfbd3fade..cd2d3ba47 100644
--- a/ethcore/src/miner/transaction_queue.rs
+++ b/ethcore/src/miner/transaction_queue.rs
@@ -990,7 +990,7 @@ impl TransactionQueue {
 		let mut update_last_nonce_to = None;
 		{
 			let by_nonce = self.future.by_address.row_mut(&address);
-			if let None = by_nonce {
+			if by_nonce.is_none() {
 				return;
 			}
 			let mut by_nonce = by_nonce.expect("None is tested in early-exit condition above; qed");
@@ -1212,12 +1212,12 @@ mod test {
 	use util::table::*;
 	use util::*;
 	use ethkey::{Random, Generator};
-	use transaction::*;
 	use error::{Error, TransactionError};
 	use super::*;
 	use super::{TransactionSet, TransactionOrder, VerifiedTransaction};
 	use miner::local_transactions::LocalTransactionsList;
 	use client::TransactionImportResult;
+	use transaction::{SignedTransaction, Transaction, Action};
 
 	fn unwrap_tx_err(err: Result<TransactionImportResult, Error>) -> TransactionError {
 		match err.unwrap_err() {
diff --git a/ethcore/src/pod_account.rs b/ethcore/src/pod_account.rs
index 0882b688c..92a78cebd 100644
--- a/ethcore/src/pod_account.rs
+++ b/ethcore/src/pod_account.rs
@@ -64,13 +64,13 @@ impl PodAccount {
 	}
 
 	/// Place additional data into given hash DB.
-	pub fn insert_additional(&self, db: &mut AccountDBMut) {
+	pub fn insert_additional(&self, db: &mut AccountDBMut, factory: &TrieFactory) {
 		match self.code {
 			Some(ref c) if !c.is_empty() => { db.insert(c); }
 			_ => {}
 		}
 		let mut r = H256::new();
-		let mut t = SecTrieDBMut::new(db, &mut r);
+		let mut t = factory.create(db, &mut r);
 		for (k, v) in &self.storage {
 			if let Err(e) = t.insert(k, &rlp::encode(&U256::from(&**v))) {
 				warn!("Encountered potential DB corruption: {}", e);
diff --git a/ethcore/src/snapshot/mod.rs b/ethcore/src/snapshot/mod.rs
index 3f63ac208..408941309 100644
--- a/ethcore/src/snapshot/mod.rs
+++ b/ethcore/src/snapshot/mod.rs
@@ -552,11 +552,11 @@ const POW_VERIFY_RATE: f32 = 0.02;
 pub fn verify_old_block(rng: &mut OsRng, header: &Header, engine: &Engine, chain: &BlockChain, body: Option<&[u8]>, always: bool) -> Result<(), ::error::Error> {
 	if always || rng.gen::<f32>() <= POW_VERIFY_RATE {
 		match chain.block_header(header.parent_hash()) {
-			Some(parent) => engine.verify_block_family(&header, &parent, body),
-			None => engine.verify_block_seal(&header),
+			Some(parent) => engine.verify_block_family(header, &parent, body),
+			None => engine.verify_block_seal(header),
 		}
 	} else {
-		engine.verify_block_basic(&header, body)
+		engine.verify_block_basic(header, body)
 	}
 }
 
diff --git a/ethcore/src/spec/spec.rs b/ethcore/src/spec/spec.rs
index c8910bbdd..71c15bca2 100644
--- a/ethcore/src/spec/spec.rs
+++ b/ethcore/src/spec/spec.rs
@@ -244,13 +244,13 @@ impl Spec {
 	}
 
 	/// Ensure that the given state DB has the trie nodes in for the genesis state.
-	pub fn ensure_db_good(&self, db: &mut StateDB) -> Result<bool, Box<TrieError>> {
+	pub fn ensure_db_good(&self, db: &mut StateDB, factory: &TrieFactory) -> Result<bool, Box<TrieError>> {
 		if !db.as_hashdb().contains(&self.state_root()) {
 			trace!(target: "spec", "ensure_db_good: Fresh database? Cannot find state root {}", self.state_root());
 			let mut root = H256::new();
 
 			{
-				let mut t = SecTrieDBMut::new(db.as_hashdb_mut(), &mut root);
+				let mut t = factory.create(db.as_hashdb_mut(), &mut root);
 				for (address, account) in self.genesis_state.get().iter() {
 					try!(t.insert(&**address, &account.rlp()));
 				}
@@ -258,7 +258,7 @@ impl Spec {
 			trace!(target: "spec", "ensure_db_good: Populated sec trie; root is {}", root);
 			for (address, account) in self.genesis_state.get().iter() {
 				db.note_non_null_account(address);
-				account.insert_additional(&mut AccountDBMut::new(db.as_hashdb_mut(), address));
+				account.insert_additional(&mut AccountDBMut::new(db.as_hashdb_mut(), address), factory);
 			}
 			assert!(db.as_hashdb().contains(&self.state_root()));
 			Ok(true)
diff --git a/ethcore/src/state/account.rs b/ethcore/src/state/account.rs
index 76061f6a0..bdcc92bd0 100644
--- a/ethcore/src/state/account.rs
+++ b/ethcore/src/state/account.rs
@@ -314,11 +314,10 @@ impl Account {
 		self.code_hash == SHA3_EMPTY
 	}
 
-	#[cfg(test)]
-	/// return the storage root associated with this account or None if it has been altered via the overlay.
+	/// Return the storage root associated with this account or None if it has been altered via the overlay.
 	pub fn storage_root(&self) -> Option<&H256> { if self.storage_is_clean() {Some(&self.storage_root)} else {None} }
 
-	/// return the storage overlay.
+	/// Return the storage overlay.
 	pub fn storage_changes(&self) -> &HashMap<H256, H256> { &self.storage_changes }
 
 	/// Increment the nonce of the account by one.
@@ -445,11 +444,10 @@ impl fmt::Debug for Account {
 
 #[cfg(test)]
 mod tests {
-
+	use rlp::{UntrustedRlp, RlpType, View, Compressible};
 	use util::*;
 	use super::*;
 	use account_db::*;
-	use rlp::*;
 
 	#[test]
 	fn account_compress() {
diff --git a/ethcore/src/state/mod.rs b/ethcore/src/state/mod.rs
index 01a7e3b15..db7c318c6 100644
--- a/ethcore/src/state/mod.rs
+++ b/ethcore/src/state/mod.rs
@@ -369,6 +369,12 @@ impl State {
 			|a| a.as_ref().map_or(self.account_start_nonce, |account| *account.nonce()))
 	}
 
+	/// Get the storage root of account `a`.
+	pub fn storage_root(&self, a: &Address) -> Option<H256> {
+		self.ensure_cached(a, RequireCache::None, true,
+			|a| a.as_ref().and_then(|account| account.storage_root().cloned()))
+	}
+
 	/// Mutate storage of account `address` so that it is `value` for `key`.
 	pub fn storage_at(&self, address: &Address, key: &H256) -> H256 {
 		// Storage key search and update works like this:
@@ -445,6 +451,7 @@ impl State {
 	}
 
 	/// Add `incr` to the balance of account `a`.
+	#[cfg_attr(feature="dev", allow(single_match))]
 	pub fn add_balance(&mut self, a: &Address, incr: &U256, cleanup_mode: CleanupMode) {
 		trace!(target: "state", "add_balance({}, {}): {}", a, incr, self.balance(a));
 		let is_value_transfer = !incr.is_zero();
diff --git a/ethcore/src/state/substate.rs b/ethcore/src/state/substate.rs
index 853b0e422..c11f802a1 100644
--- a/ethcore/src/state/substate.rs
+++ b/ethcore/src/state/substate.rs
@@ -57,6 +57,7 @@ impl Substate {
 	}
 
 	/// Get the cleanup mode object from this.
+	#[cfg_attr(feature="dev", allow(wrong_self_convention))]
 	pub fn to_cleanup_mode(&mut self, schedule: &Schedule) -> CleanupMode {
 		match (schedule.no_empty, schedule.kill_empty) {
 			(false, _) => CleanupMode::ForceCreate,
diff --git a/ethcore/src/state_db.rs b/ethcore/src/state_db.rs
index 3a3595a35..eafa4022e 100644
--- a/ethcore/src/state_db.rs
+++ b/ethcore/src/state_db.rs
@@ -397,6 +397,7 @@ impl StateDB {
 	}
 
 	/// Get cached code based on hash.
+	#[cfg_attr(feature="dev", allow(map_clone))]
 	pub fn get_cached_code(&self, hash: &H256) -> Option<Arc<Vec<u8>>> {
 		let mut cache = self.code_cache.lock();
 
diff --git a/ethcore/src/tests/client.rs b/ethcore/src/tests/client.rs
index 99b251d66..427082823 100644
--- a/ethcore/src/tests/client.rs
+++ b/ethcore/src/tests/client.rs
@@ -62,7 +62,7 @@ fn should_return_registrar() {
 		&db_config
 	).unwrap();
 	let params = client.additional_params();
-	let address = params.get("registrar").unwrap();
+	let address = &params["registrar"];
 
 	assert_eq!(address.len(), 40);
 	assert!(U256::from_str(address).is_ok());
@@ -93,7 +93,7 @@ fn imports_good_block() {
 		&db_config
 	).unwrap();
 	let good_block = get_good_dummy_block();
-	if let Err(_) = client.import_block(good_block) {
+	if client.import_block(good_block).is_err() {
 		panic!("error importing block being good by definition");
 	}
 	client.flush_queue();
@@ -203,18 +203,18 @@ fn can_collect_garbage() {
 
 #[test]
 fn can_generate_gas_price_median() {
-	let client_result = generate_dummy_client_with_data(3, 1, &vec_into![1, 2, 3]);
+	let client_result = generate_dummy_client_with_data(3, 1, slice_into![1, 2, 3]);
 	let client = client_result.reference();
 	assert_eq!(Some(U256::from(2)), client.gas_price_median(3));
 
-	let client_result = generate_dummy_client_with_data(4, 1, &vec_into![1, 4, 3, 2]);
+	let client_result = generate_dummy_client_with_data(4, 1, slice_into![1, 4, 3, 2]);
 	let client = client_result.reference();
 	assert_eq!(Some(U256::from(3)), client.gas_price_median(4));
 }
 
 #[test]
 fn can_generate_gas_price_histogram() {
-	let client_result = generate_dummy_client_with_data(20, 1, &vec_into![6354,8593,6065,4842,7845,7002,689,4958,4250,6098,5804,4320,643,8895,2296,8589,7145,2000,2512,1408]);
+	let client_result = generate_dummy_client_with_data(20, 1, slice_into![6354,8593,6065,4842,7845,7002,689,4958,4250,6098,5804,4320,643,8895,2296,8589,7145,2000,2512,1408]);
 	let client = client_result.reference();
 
 	let hist = client.gas_price_histogram(20, 5).unwrap();
@@ -224,7 +224,7 @@ fn can_generate_gas_price_histogram() {
 
 #[test]
 fn empty_gas_price_histogram() {
-	let client_result = generate_dummy_client_with_data(20, 0, &vec_into![]);
+	let client_result = generate_dummy_client_with_data(20, 0, slice_into![]);
 	let client = client_result.reference();
 
 	assert!(client.gas_price_histogram(20, 5).is_none());
diff --git a/ethcore/src/tests/helpers.rs b/ethcore/src/tests/helpers.rs
index adfb4f096..77a6f117a 100644
--- a/ethcore/src/tests/helpers.rs
+++ b/ethcore/src/tests/helpers.rs
@@ -18,6 +18,7 @@ use ethkey::KeyPair;
 use io::*;
 use client::{BlockChainClient, Client, ClientConfig};
 use util::*;
+use util::trie::TrieSpec;
 use spec::*;
 use state_db::StateDB;
 use block::{OpenBlock, Drain};
@@ -157,7 +158,7 @@ pub fn generate_dummy_client_with_spec_and_data<F>(get_test_spec: F, block_numbe
 
 	let mut db_result = get_temp_state_db();
 	let mut db = db_result.take();
-	test_spec.ensure_db_good(&mut db).unwrap();
+	test_spec.ensure_db_good(&mut db, &TrieFactory::new(TrieSpec::Secure)).unwrap();
 	let genesis_header = test_spec.genesis_header();
 
 	let mut rolling_timestamp = 40;
@@ -262,7 +263,7 @@ pub fn get_test_client_with_blocks(blocks: Vec<Bytes>) -> GuardedTempResult<Arc<
 	).unwrap();
 
 	for block in &blocks {
-		if let Err(_) = client.import_block(block.clone()) {
+		if client.import_block(block.clone()).is_err() {
 			panic!("panic importing block which is well-formed");
 		}
 	}
diff --git a/ethcore/src/types/mode.rs b/ethcore/src/types/mode.rs
index 58f652c6c..dff75e158 100644
--- a/ethcore/src/types/mode.rs
+++ b/ethcore/src/types/mode.rs
@@ -19,16 +19,16 @@
 pub use std::time::Duration;
 use client::Mode as ClientMode;
 
-/// IPC-capable shadow-type for client::config::Mode
+/// IPC-capable shadow-type for `client::config::Mode`
 #[derive(Clone, Binary, Debug)]
 pub enum Mode {
-	/// Same as ClientMode::Off.
+	/// Same as `ClientMode::Off`.
 	Off,
-	/// Same as ClientMode::Dark; values in seconds.
+	/// Same as `ClientMode::Dark`; values in seconds.
 	Dark(u64),
-	/// Same as ClientMode::Passive; values in seconds.
+	/// Same as `ClientMode::Passive`; values in seconds.
 	Passive(u64, u64),
-	/// Same as ClientMode::Active.
+	/// Same as `ClientMode::Active`.
 	Active,
 }
 
@@ -52,4 +52,4 @@ impl From<Mode> for ClientMode {
 			Mode::Active => ClientMode::Active,
 		}
 	}
-}
\ No newline at end of file
+}
diff --git a/ethcore/src/types/transaction.rs b/ethcore/src/types/transaction.rs
index d7e06790b..91a4ac836 100644
--- a/ethcore/src/types/transaction.rs
+++ b/ethcore/src/types/transaction.rs
@@ -73,7 +73,7 @@ pub struct Transaction {
 impl Transaction {
 	/// Append object with a without signature into RLP stream
 	pub fn rlp_append_unsigned_transaction(&self, s: &mut RlpStream, network_id: Option<u8>) {
-		s.begin_list(if let None = network_id { 6 } else { 9 });
+		s.begin_list(if network_id.is_none() { 6 } else { 9 });
 		s.append(&self.nonce);
 		s.append(&self.gas_price);
 		s.append(&self.gas);
@@ -210,7 +210,7 @@ pub struct SignedTransaction {
 	/// Plain Transaction.
 	unsigned: Transaction,
 	/// The V field of the signature; the LS bit described which half of the curve our point falls
-	/// in. The MS bits describe which network this transaction is for. If 27/28, its for all networks.  
+	/// in. The MS bits describe which network this transaction is for. If 27/28, its for all networks.
 	v: u8,
 	/// The R field of the signature; helps describe the point on the curve.
 	r: U256,
@@ -464,7 +464,7 @@ fn should_agree_with_vitalik() {
 		let signed: SignedTransaction = decode(&FromHex::from_hex(tx_data).unwrap());
 		signed.check_low_s().unwrap();
 		assert_eq!(signed.sender().unwrap(), address.into());
-		flushln!("networkid: {:?}", signed.network_id()); 
+		flushln!("networkid: {:?}", signed.network_id());
 	};
 
 	test_vector("f864808504a817c800825208943535353535353535353535353535353535353535808025a0044852b2a670ade5407e78fb2863c51de9fcb96542a07186fe3aeda6bb8a116da0044852b2a670ade5407e78fb2863c51de9fcb96542a07186fe3aeda6bb8a116d", "0xf0f6f18bca1b28cd68e4357452947e021241e9ce")
@@ -477,4 +477,4 @@ fn should_agree_with_vitalik() {
 	test_vector("f867078504a817c807830290409435353535353535353535353535353535353535358201578025a052f1a9b320cab38e5da8a8f97989383aab0a49165fc91c737310e4f7e9821021a052f1a9b320cab38e5da8a8f97989383aab0a49165fc91c737310e4f7e9821021", "0xd37922162ab7cea97c97a87551ed02c9a38b7332")
 	test_vector("f867088504a817c8088302e2489435353535353535353535353535353535353535358202008025a064b1702d9298fee62dfeccc57d322a463ad55ca201256d01f62b45b2e1c21c12a064b1702d9298fee62dfeccc57d322a463ad55ca201256d01f62b45b2e1c21c10", "0x9bddad43f934d313c2b79ca28a432dd2b7281029")
 	test_vector("f867098504a817c809830334509435353535353535353535353535353535353535358202d98025a052f8f61201b2b11a78d6e866abc9c3db2ae8631fa656bfe5cb53668255367afba052f8f61201b2b11a78d6e866abc9c3db2ae8631fa656bfe5cb53668255367afb", "0x3c24d7329e92f84f08556ceb6df1cdb0104ca49f")
-}
\ No newline at end of file
+}
diff --git a/ethcore/src/verification/verification.rs b/ethcore/src/verification/verification.rs
index 47b2e16de..7e42e8881 100644
--- a/ethcore/src/verification/verification.rs
+++ b/ethcore/src/verification/verification.rs
@@ -29,6 +29,7 @@ use header::{BlockNumber, Header};
 use rlp::{UntrustedRlp, View};
 use transaction::SignedTransaction;
 use views::BlockView;
+use time::get_time;
 
 /// Preprocessed block data gathered in `verify_block_unordered` call
 pub struct PreverifiedBlock {
@@ -209,6 +210,10 @@ pub fn verify_header_params(header: &Header, engine: &Engine) -> Result<(), Erro
 	if header.number() != 0 && header.extra_data().len() > maximum_extra_data_size {
 		return Err(From::from(BlockError::ExtraDataOutOfBounds(OutOfBounds { min: None, max: Some(maximum_extra_data_size), found: header.extra_data().len() })));
 	}
+	let max_time = get_time().sec as u64 + 30;
+	if header.timestamp() > max_time {
+		return Err(From::from(BlockError::InvalidTimestamp(OutOfBounds { max: Some(max_time), min: None, found: header.timestamp() })))
+	}
 	Ok(())
 }
 
@@ -258,6 +263,7 @@ mod tests {
 	use tests::helpers::*;
 	use types::log_entry::{LogEntry, LocalizedLogEntry};
 	use rlp::View;
+	use time::get_time;
 
 	fn check_ok(result: Result<(), Error>) {
 		result.unwrap_or_else(|e| panic!("Block verification failed: {:?}", e));
@@ -271,6 +277,14 @@ mod tests {
 		}
 	}
 
+	fn check_fail_timestamp(result: Result<(), Error>) {
+		match result {
+			Err(Error::Block(BlockError::InvalidTimestamp(_))) => (),
+			Err(other) => panic!("Block verification failed.\nExpected: InvalidTimestamp\nGot: {:?}", other),
+			Ok(_) => panic!("Block verification failed.\nExpected: InvalidTimestamp\nGot: Ok"),
+		}
+	}
+
 	struct TestBlockChain {
 		blocks: HashMap<H256, Bytes>,
 		numbers: HashMap<BlockNumber, H256>,
@@ -515,6 +529,14 @@ mod tests {
 		check_fail(family_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine, &bc),
 			InvalidTimestamp(OutOfBounds { max: None, min: Some(parent.timestamp() + 1), found: header.timestamp() }));
 
+		header = good.clone();
+		header.set_timestamp(2450000000);
+		check_fail_timestamp(basic_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine));
+
+		header = good.clone();
+		header.set_timestamp(get_time().sec as u64 + 40);
+		check_fail_timestamp(basic_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine));
+
 		header = good.clone();
 		header.set_number(9);
 		check_fail(family_test(&create_test_block_with_data(&header, &good_transactions, &good_uncles), engine, &bc),
diff --git a/js/assets/images/certifications/unknown.svg b/js/assets/images/certifications/unknown.svg
new file mode 100644
index 000000000..1554bcc25
--- /dev/null
+++ b/js/assets/images/certifications/unknown.svg
@@ -0,0 +1,4 @@
+<svg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg">
+	<circle fill="#4A90E2" cx="50" cy="50" r="50"/>
+	<path d="M20 45 L10 55 L35 85 L90 35 L80 25 L36 65 z" fill="#FFF"/>
+</svg>
diff --git a/js/package.json b/js/package.json
index a6f705ec6..67fd98976 100644
--- a/js/package.json
+++ b/js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "parity.js",
-  "version": "0.2.78",
+  "version": "0.2.80",
   "main": "release/index.js",
   "jsnext:main": "src/index.js",
   "author": "Parity Team <admin@parity.io>",
@@ -72,6 +72,7 @@
     "core-js": "~2.4.1",
     "coveralls": "~2.11.11",
     "css-loader": "~0.26.0",
+    "ejs-loader": "~0.3.0",
     "enzyme": "2.3.0",
     "eslint": "~3.10.2",
     "eslint-config-semistandard": "~7.0.0",
diff --git a/js/src/api/format/output.js b/js/src/api/format/output.js
index 262a275a0..1094cdb83 100644
--- a/js/src/api/format/output.js
+++ b/js/src/api/format/output.js
@@ -144,7 +144,8 @@ export function outSignerRequest (request) {
           break;
 
         case 'payload':
-          request[key].transaction = outTransaction(request[key].transaction);
+          request[key].signTransaction = outTransaction(request[key].signTransaction);
+          request[key].sendTransaction = outTransaction(request[key].sendTransaction);
           break;
       }
     });
diff --git a/js/src/contracts/abi/badgereg.json b/js/src/contracts/abi/badgereg.json
new file mode 100644
index 000000000..3d18ba393
--- /dev/null
+++ b/js/src/contracts/abi/badgereg.json
@@ -0,0 +1 @@
+[{"constant":false,"inputs":[{"name":"_new","type":"address"}],"name":"setOwner","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_addr","type":"address"},{"name":"_name","type":"bytes32"}],"name":"register","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_name","type":"bytes32"}],"name":"fromName","outputs":[{"name":"id","type":"uint256"},{"name":"addr","type":"address"},{"name":"owner","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"badgeCount","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_fee","type":"uint256"}],"name":"setFee","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_id","type":"uint256"},{"name":"_key","type":"bytes32"}],"name":"meta","outputs":[{"name":"","type":"bytes32"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"drain","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_id","type":"uint256"}],"name":"unregister","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_addr","type":"address"}],"name":"fromAddress","outputs":[{"name":"id","type":"uint256"},{"name":"name","type":"bytes32"},{"name":"owner","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_id","type":"uint256"}],"name":"badge","outputs":[{"name":"addr","type":"address"},{"name":"name","type":"bytes32"},{"name":"owner","type":"address"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_id","type":"uint256"},{"name":"_key","type":"bytes32"},{"name":"_value","type":"bytes32"}],"name":"setMeta","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_addr","type":"address"},{"name":"_name","type":"bytes32"},{"name":"_owner","type":"address"}],"name":"registerAs","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"fee","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"name","type":"bytes32"},{"indexed":true,"name":"id","type":"uint256"},{"indexed":false,"name":"addr","type":"address"}],"name":"Registered","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"name","type":"bytes32"},{"indexed":true,"name":"id","type":"uint256"}],"name":"Unregistered","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"id","type":"uint256"},{"indexed":true,"name":"key","type":"bytes32"},{"indexed":false,"name":"value","type":"bytes32"}],"name":"MetaChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"old","type":"address"},{"indexed":true,"name":"current","type":"address"}],"name":"NewOwner","type":"event"}]
\ No newline at end of file
diff --git a/js/src/contracts/abi/certifier.json b/js/src/contracts/abi/certifier.json
new file mode 100644
index 000000000..905ddde6c
--- /dev/null
+++ b/js/src/contracts/abi/certifier.json
@@ -0,0 +1 @@
+[{"constant":true,"inputs":[{"name":"_who","type":"address"},{"name":"_field","type":"string"}],"name":"getAddress","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_who","type":"address"},{"name":"_field","type":"string"}],"name":"getUint","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_who","type":"address"}],"name":"certified","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_who","type":"address"},{"name":"_field","type":"string"}],"name":"get","outputs":[{"name":"","type":"bytes32"}],"payable":false,"type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"who","type":"address"}],"name":"Confirmed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"who","type":"address"}],"name":"Revoked","type":"event"}]
\ No newline at end of file
diff --git a/js/src/contracts/abi/index.js b/js/src/contracts/abi/index.js
index a6a7f0783..f15765b1a 100644
--- a/js/src/contracts/abi/index.js
+++ b/js/src/contracts/abi/index.js
@@ -14,6 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+import badgereg from './badgereg.json';
 import basiccoin from './basiccoin.json';
 import basiccoinmanager from './basiccoinmanager.json';
 import dappreg from './dappreg.json';
@@ -28,6 +29,7 @@ import tokenreg from './tokenreg.json';
 import wallet from './wallet.json';
 
 export {
+  badgereg,
   basiccoin,
   basiccoinmanager,
   dappreg,
diff --git a/js/src/contracts/badgereg.js b/js/src/contracts/badgereg.js
new file mode 100644
index 000000000..f8dbefa78
--- /dev/null
+++ b/js/src/contracts/badgereg.js
@@ -0,0 +1,66 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import { bytesToHex, hex2Ascii } from '../api/util/format';
+
+import ABI from './abi/certifier.json';
+
+const ZERO = '0x0000000000000000000000000000000000000000000000000000000000000000';
+
+export default class BadgeReg {
+  constructor (api, registry) {
+    this._api = api;
+    this._registry = registry;
+
+    registry.getContract('badgereg');
+    this.certifiers = {}; // by name
+    this.contracts = {}; // by name
+  }
+
+  fetchCertifier (name) {
+    if (this.certifiers[name]) {
+      return Promise.resolve(this.certifiers[name]);
+    }
+    return this._registry.getContract('badgereg')
+      .then((badgeReg) => {
+        return badgeReg.instance.fromName.call({}, [name])
+        .then(([ id, address ]) => {
+          return Promise.all([
+            badgeReg.instance.meta.call({}, [id, 'TITLE']),
+            badgeReg.instance.meta.call({}, [id, 'IMG'])
+          ])
+            .then(([ title, img ]) => {
+              title = bytesToHex(title);
+              title = title === ZERO ? null : hex2Ascii(title);
+              if (bytesToHex(img) === ZERO) img = null;
+
+              const data = { address, name, title, icon: img };
+              this.certifiers[name] = data;
+              return data;
+            });
+        });
+      });
+  }
+
+  checkIfCertified (certifier, address) {
+    if (!this.contracts[certifier]) {
+      this.contracts[certifier] = this._api.newContract(ABI, certifier);
+    }
+    const contract = this.contracts[certifier];
+
+    return contract.instance.certified.call({}, [address]);
+  }
+}
diff --git a/js/src/contracts/contracts.js b/js/src/contracts/contracts.js
index cefece7de..f61a63690 100644
--- a/js/src/contracts/contracts.js
+++ b/js/src/contracts/contracts.js
@@ -20,6 +20,7 @@ import SignatureReg from './signaturereg';
 import TokenReg from './tokenreg';
 import GithubHint from './githubhint';
 import * as smsVerification from './sms-verification';
+import BadgeReg from './badgereg';
 
 let instance = null;
 
@@ -33,6 +34,7 @@ export default class Contracts {
     this._signaturereg = new SignatureReg(api, this._registry);
     this._tokenreg = new TokenReg(api, this._registry);
     this._githubhint = new GithubHint(api, this._registry);
+    this.badgeReg = new BadgeReg(api, this._registry);
   }
 
   get registry () {
diff --git a/js/src/dapps/dappreg.js b/js/src/dapps/dappreg.js
index 8ed9724bc..9bd96f1a7 100644
--- a/js/src/dapps/dappreg.js
+++ b/js/src/dapps/dappreg.js
@@ -17,10 +17,8 @@
 import React from 'react';
 import ReactDOM from 'react-dom';
 import injectTapEventPlugin from 'react-tap-event-plugin';
-import { useStrict } from 'mobx';
 
 injectTapEventPlugin();
-useStrict(true);
 
 import Application from './dappreg/Application';
 
diff --git a/js/src/dapps/index.ejs b/js/src/dapps/index.ejs
index 250194529..fa65c78bf 100644
--- a/js/src/dapps/index.ejs
+++ b/js/src/dapps/index.ejs
@@ -11,28 +11,23 @@
         height: 100%;
         margin: 0;
         padding: 0;
-      }
-
-      .loading-container {
-        display: flex;
-        align-items: center;
-        justify-content: center;
-        height: 100%;
-        font-family: Roboto;
-        background-color: rgba(0, 0, 0, 0.8);
-        color: #ddd;
+        background: white;
+        font-family: 'Roboto', sans-serif;
+        font-size: 16px;
+        font-weight: 300;
       }
 
       .loading {
-        font-size: 4em;
+        text-align: center;
+        padding-top: 5em;
+        font-size: 2em;
+        color: #999;
       }
     </style>
   </head>
   <body>
     <div id="container">
-      <div class="loading-container">
-        <span class="loading">Loading...</span>
-      </div>
+      <div class="loading">Loading</div>
     </div>
     <script src="vendor.js"></script>
     <% if (!htmlWebpackPlugin.options.secure) { %>
diff --git a/js/src/index.ejs b/js/src/index.ejs
index eefc50dbb..48cd5c0c0 100644
--- a/js/src/index.ejs
+++ b/js/src/index.ejs
@@ -11,28 +11,23 @@
         height: 100%;
         margin: 0;
         padding: 0;
-      }
-
-      .loading-container {
-        display: flex;
-        align-items: center;
-        justify-content: center;
-        height: 100%;
-        font-family: Roboto;
-        background-color: rgba(0, 0, 0, 0.8);
-        color: #ddd;
+        background: white;
+        font-family: 'Roboto', sans-serif;
+        font-size: 16px;
+        font-weight: 300;
       }
 
       .loading {
-        font-size: 4em;
+        text-align: center;
+        padding-top: 5em;
+        font-size: 2em;
+        color: #999;
       }
     </style>
   </head>
   <body>
     <div id="container">
-      <div class="loading-container">
-        <span class="loading">Loading...</span>
-      </div>
+      <div class="loading">Loading</span>
     </div>
     <script src="vendor.js"></script>
   </body>
diff --git a/js/src/modals/CreateAccount/AccountDetails/accountDetails.js b/js/src/modals/CreateAccount/AccountDetails/accountDetails.js
index 14c858c06..945bcc975 100644
--- a/js/src/modals/CreateAccount/AccountDetails/accountDetails.js
+++ b/js/src/modals/CreateAccount/AccountDetails/accountDetails.js
@@ -15,8 +15,15 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 import React, { Component, PropTypes } from 'react';
+import PrintIcon from 'material-ui/svg-icons/action/print';
 
 import { Form, Input, InputAddress } from '../../../ui';
+import Button from '../../../ui/Button';
+
+import { createIdentityImg } from '../../../api/util/identity';
+import print from './print';
+import recoveryPage from './recovery-page.ejs';
+import ParityLogo from '../../../../assets/images/parity-logo-black-no-text.svg';
 
 export default class AccountDetails extends Component {
   static propTypes = {
@@ -42,6 +49,7 @@ export default class AccountDetails extends Component {
           label='address'
           value={ address } />
         { this.renderPhrase() }
+        { this.renderPhraseCopyButton() }
       </Form>
     );
   }
@@ -62,4 +70,26 @@ export default class AccountDetails extends Component {
         value={ phrase } />
     );
   }
+
+  renderPhraseCopyButton () {
+    const { phrase } = this.props;
+    if (!phrase) {
+      return null;
+    }
+
+    return (
+      <Button
+        icon={ <PrintIcon /> }
+        label={ 'print recovery phrase' }
+        onClick={ this.printPhrase }
+      />
+    );
+  }
+
+  printPhrase = () => {
+    const { address, phrase, name } = this.props;
+    const identity = createIdentityImg(address);
+
+    print(recoveryPage({ phrase, name, identity, address, logo: ParityLogo }));
+  }
 }
diff --git a/js/src/modals/CreateAccount/AccountDetails/print.js b/js/src/modals/CreateAccount/AccountDetails/print.js
new file mode 100644
index 000000000..18cddeee9
--- /dev/null
+++ b/js/src/modals/CreateAccount/AccountDetails/print.js
@@ -0,0 +1,63 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+export const onPrint = (window, cb) => {
+  let called = false; let query, queryFn;
+
+  const onPrint = () => {
+    if (queryFn) {
+      query.removeListener(queryFn);
+    }
+    window.removeEventListener('afterprint', onPrint, false);
+    if (!called) {
+      called = true;
+      cb();
+    }
+  };
+
+  if (window.matchMedia) {
+    queryFn = (query) => {
+      if (!query.matches) {
+        onPrint();
+      }
+    };
+    query = window.matchMedia('print');
+    query.addListener(queryFn);
+  }
+  window.addEventListener('afterprint', onPrint, false);
+};
+
+export default (html) => {
+  const iframe = document.createElement('iframe');
+  iframe.setAttribute('sandbox', 'allow-modals allow-same-origin allow-scripts');
+  iframe.setAttribute('src', '/');
+  iframe.setAttribute('style', 'display: none');
+  document.body.appendChild(iframe);
+  const teardown = () => {
+    // Safari crashes without a timeout.
+    setTimeout(() => document.body.removeChild(iframe), 0);
+  };
+
+  setTimeout(() => {
+    iframe.contentDocument.write(html);
+
+    setTimeout(() => {
+      onPrint(iframe.contentWindow, teardown);
+      iframe.contentWindow.focus();
+      iframe.contentWindow.print();
+    }, 20);
+  }, 0);
+};
diff --git a/js/src/modals/CreateAccount/AccountDetails/recovery-page.ejs b/js/src/modals/CreateAccount/AccountDetails/recovery-page.ejs
new file mode 100644
index 000000000..bcd1a8b42
--- /dev/null
+++ b/js/src/modals/CreateAccount/AccountDetails/recovery-page.ejs
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+
+<html lang="en">
+  <head>
+    <title>Recovery phrase for <%= name %></title>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width">
+    <style>
+      body {
+        margin: 2em auto;
+        max-width: 30em;
+        padding: 1em;
+        text-align: center;
+        font-size: 110%;
+        font-family: sans-serif;
+        font-weight: 300;
+      }
+      #logo {
+        max-width: 4rem;
+        margin-bottom: 3rem;
+      }
+      p {
+        margin-bottom: 1rem;
+      }
+      figure {
+        margin-bottom: 1rem;
+      }
+      figure.address img {
+        border-radius: 100%;
+      }
+      pre code {
+        display: inline-block;
+        text-align: center;
+        white-space: normal;
+        line-height: 1.3;
+      }
+    </style>
+  </head>
+  <body>
+    <img id="logo" src="<%= logo %>" alt="Parity Logo" />
+    <p>This is your account <em><%= name %></em>:</p>
+    <figure class="address">
+      <img src="<%= identity %>" alt="symbol for the address of the account" />
+      <figcaption><code><%= address %></code></figcaption>
+    </figure>
+    <p>This is the recovery phrase:</p>
+    <pre><code><%= phrase %></code></pre>
+  </body>
+</html>
diff --git a/js/src/redux/middleware.js b/js/src/redux/middleware.js
index a54f2fae4..c48c64673 100644
--- a/js/src/redux/middleware.js
+++ b/js/src/redux/middleware.js
@@ -20,17 +20,20 @@ import SettingsMiddleware from '../views/Settings/middleware';
 import SignerMiddleware from './providers/signerMiddleware';
 
 import statusMiddleware from '../views/Status/middleware';
+import CertificationsMiddleware from './providers/certifications/middleware';
 
 export default function (api) {
   const errors = new ErrorsMiddleware();
   const signer = new SignerMiddleware(api);
   const settings = new SettingsMiddleware();
   const status = statusMiddleware();
+  const certifications = new CertificationsMiddleware();
 
   const middleware = [
     settings.toMiddleware(),
     signer.toMiddleware(),
-    errors.toMiddleware()
+    errors.toMiddleware(),
+    certifications.toMiddleware()
   ];
 
   return middleware.concat(status, thunk);
diff --git a/js/src/redux/providers/certifications/actions.js b/js/src/redux/providers/certifications/actions.js
new file mode 100644
index 000000000..c84f7db55
--- /dev/null
+++ b/js/src/redux/providers/certifications/actions.js
@@ -0,0 +1,23 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+export const fetchCertifications = (address) => ({
+  type: 'fetchCertifications', address
+});
+
+export const addCertification = (address, name, title, icon) => ({
+  type: 'addCertification', address, name, title, icon
+});
diff --git a/js/src/redux/providers/certifications/middleware.js b/js/src/redux/providers/certifications/middleware.js
new file mode 100644
index 000000000..c2f36931c
--- /dev/null
+++ b/js/src/redux/providers/certifications/middleware.js
@@ -0,0 +1,51 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import Contracts from '../../../contracts';
+import { addCertification } from './actions';
+
+const knownCertifiers = [ 'smsverification' ];
+
+export default class CertificationsMiddleware {
+  toMiddleware () {
+    return (store) => (next) => (action) => {
+      if (action.type !== 'fetchCertifications') {
+        return next(action);
+      }
+
+      const { address } = action;
+      const badgeReg = Contracts.get().badgeReg;
+
+      knownCertifiers.forEach((name) => {
+        badgeReg.fetchCertifier(name)
+          .then((cert) => {
+            return badgeReg.checkIfCertified(cert.address, address)
+              .then((isCertified) => {
+                if (isCertified) {
+                  const { name, title, icon } = cert;
+                  store.dispatch(addCertification(address, name, title, icon));
+                }
+              });
+          })
+          .catch((err) => {
+            if (err) {
+              console.error(`Failed to check if ${address} certified by ${name}:`, err);
+            }
+          });
+      });
+    };
+  }
+}
diff --git a/js/src/redux/providers/certifications/reducer.js b/js/src/redux/providers/certifications/reducer.js
new file mode 100644
index 000000000..87b0dfd33
--- /dev/null
+++ b/js/src/redux/providers/certifications/reducer.js
@@ -0,0 +1,33 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+const initialState = {};
+
+export default (state = initialState, action) => {
+  if (action.type !== 'addCertification') {
+    return state;
+  }
+
+  const { address, name, icon, title } = action;
+  const certifications = state[address] || [];
+
+  if (certifications.some((c) => c.name === name)) {
+    return state;
+  }
+  const newCertifications = certifications.concat({ name, icon, title });
+
+  return { ...state, [address]: newCertifications };
+};
diff --git a/js/src/redux/providers/signerMiddleware.js b/js/src/redux/providers/signerMiddleware.js
index 4cc877ced..f5cbbd8f9 100644
--- a/js/src/redux/providers/signerMiddleware.js
+++ b/js/src/redux/providers/signerMiddleware.js
@@ -72,9 +72,8 @@ export default class SignerMiddleware {
     };
 
     // Sign request in-browser
-    if (wallet && payload.transaction) {
-      const { transaction } = payload;
-
+    const transaction = payload.sendTransaction || payload.signTransaction;
+    if (wallet && transaction) {
       (transaction.nonce.isZero()
         ? this._api.parity.nextNonce(transaction.from)
         : Promise.resolve(transaction.nonce)
diff --git a/js/src/redux/reducers.js b/js/src/redux/reducers.js
index 45119d289..3c7a10fe9 100644
--- a/js/src/redux/reducers.js
+++ b/js/src/redux/reducers.js
@@ -18,6 +18,7 @@ import { combineReducers } from 'redux';
 import { routerReducer } from 'react-router-redux';
 
 import { apiReducer, balancesReducer, blockchainReducer, compilerReducer, imagesReducer, personalReducer, signerReducer, statusReducer as nodeStatusReducer, snackbarReducer } from './providers';
+import certificationsReducer from './providers/certifications/reducer';
 
 import errorReducer from '../ui/Errors/reducers';
 import settingsReducer from '../views/Settings/reducers';
@@ -32,6 +33,7 @@ export default function () {
     settings: settingsReducer,
 
     balances: balancesReducer,
+    certifications: certificationsReducer,
     blockchain: blockchainReducer,
     compiler: compilerReducer,
     images: imagesReducer,
diff --git a/js/src/ui/Certifications/certifications.css b/js/src/ui/Certifications/certifications.css
new file mode 100644
index 000000000..077830e3a
--- /dev/null
+++ b/js/src/ui/Certifications/certifications.css
@@ -0,0 +1,46 @@
+/* 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/>.
+*/
+
+.certifications {
+  margin-top: 1em;
+}
+
+.certification {
+  display: inline-block;
+  position: relative;
+  margin-right: .5em;
+  padding: .3em .6em .2em 2.6em;
+  border-radius: 1em;
+  line-height: 1em;
+  text-transform: uppercase;
+  background-color: rgba(255, 255, 255, 0.07);
+}
+
+.certification:last-child {
+  margin-right: 0;
+}
+
+.icon {
+  position: absolute;
+  top: -.25em;
+  left: 0;
+  width: 2em;
+  height: 2em;
+  margin: 0;
+  padding: 0;
+  border-radius: 1em;
+}
diff --git a/js/src/ui/Certifications/certifications.js b/js/src/ui/Certifications/certifications.js
new file mode 100644
index 000000000..d2f06398e
--- /dev/null
+++ b/js/src/ui/Certifications/certifications.js
@@ -0,0 +1,87 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import React, { Component, PropTypes } from 'react';
+import { connect } from 'react-redux';
+import { bindActionCreators } from 'redux';
+
+import { hashToImageUrl } from '../../redux/providers/imagesReducer';
+import { fetchCertifications } from '../../redux/providers/certifications/actions';
+
+import defaultIcon from '../../../assets/images/certifications/unknown.svg';
+
+import styles from './certifications.css';
+
+class Certifications extends Component {
+  static propTypes = {
+    account: PropTypes.string.isRequired,
+    certifications: PropTypes.array.isRequired,
+    dappsUrl: PropTypes.string.isRequired,
+
+    fetchCertifications: PropTypes.func.isRequired
+  }
+
+  componentWillMount () {
+    const { account, fetchCertifications } = this.props;
+    fetchCertifications(account);
+  }
+
+  render () {
+    const { certifications } = this.props;
+
+    if (certifications.length === 0) {
+      return null;
+    }
+
+    return (
+      <div className={ styles.certifications }>
+        { certifications.map(this.renderCertification) }
+      </div>
+    );
+  }
+
+  renderCertification = (certification) => {
+    const { name, title, icon } = certification;
+    const { dappsUrl } = this.props;
+
+    const classNames = `${styles.certification} ${!icon ? styles.noIcon : ''}`;
+    const img = icon ? dappsUrl + hashToImageUrl(icon) : defaultIcon;
+    return (
+      <div className={ classNames } key={ name }>
+        <img className={ styles.icon } src={ img } />
+        <div className={ styles.text }>{ title || name }</div>
+      </div>
+    );
+  }
+}
+
+function mapStateToProps (_, initProps) {
+  const { account } = initProps;
+
+  return (state) => {
+    const certifications = state.certifications[account] || [];
+    return { certifications };
+  };
+}
+
+function mapDispatchToProps (dispatch) {
+  return bindActionCreators({ fetchCertifications }, dispatch);
+}
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(Certifications);
diff --git a/js/src/ui/Certifications/index.js b/js/src/ui/Certifications/index.js
new file mode 100644
index 000000000..02719ee31
--- /dev/null
+++ b/js/src/ui/Certifications/index.js
@@ -0,0 +1,17 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+export default from './certifications';
diff --git a/js/src/ui/index.js b/js/src/ui/index.js
index 4c16bc4a2..543d7c763 100644
--- a/js/src/ui/index.js
+++ b/js/src/ui/index.js
@@ -23,6 +23,7 @@ import Badge from './Badge';
 import Balance from './Balance';
 import BlockStatus from './BlockStatus';
 import Button from './Button';
+import Certifications from './Certifications';
 import ConfirmDialog from './ConfirmDialog';
 import Container, { Title as ContainerTitle } from './Container';
 import ContextProvider from './ContextProvider';
@@ -55,6 +56,7 @@ export {
   Balance,
   BlockStatus,
   Button,
+  Certifications,
   ConfirmDialog,
   Container,
   ContainerTitle,
diff --git a/js/src/views/Account/Header/header.js b/js/src/views/Account/Header/header.js
index b28abeb69..808998c17 100644
--- a/js/src/views/Account/Header/header.js
+++ b/js/src/views/Account/Header/header.js
@@ -18,6 +18,7 @@ import React, { Component, PropTypes } from 'react';
 
 import { Balance, Container, ContainerTitle, IdentityIcon, IdentityName, Tags } from '../../../ui';
 import CopyToClipboard from '../../../ui/CopyToClipboard';
+import Certifications from '../../../ui/Certifications';
 
 import styles from './header.css';
 
@@ -32,6 +33,7 @@ export default class Header extends Component {
   }
 
   render () {
+    const { api } = this.context;
     const { account, balance } = this.props;
     const { address, meta, uuid } = account;
 
@@ -67,6 +69,10 @@ export default class Header extends Component {
             <Balance
               account={ account }
               balance={ balance } />
+            <Certifications
+              account={ account.address }
+              dappsUrl={ api.dappsUrl }
+            />
           </div>
         </Container>
       </div>
diff --git a/js/src/views/Account/account.js b/js/src/views/Account/account.js
index e27333cbf..21d2f380c 100644
--- a/js/src/views/Account/account.js
+++ b/js/src/views/Account/account.js
@@ -64,12 +64,6 @@ class Account extends Component {
   }
 
   componentDidMount () {
-    const { api } = this.context;
-    const { address } = this.props.params;
-    const { isTestnet } = this.props;
-
-    const verificationStore = new VerificationStore(api, address, isTestnet);
-    this.setState({ verificationStore });
     this.setVisibleAccounts();
   }
 
@@ -80,6 +74,15 @@ class Account extends Component {
     if (prevAddress !== nextAddress) {
       this.setVisibleAccounts(nextProps);
     }
+
+    const { isTestnet } = nextProps;
+    if (typeof isTestnet === 'boolean' && !this.state.verificationStore) {
+      const { api } = this.context;
+      const { address } = nextProps.params;
+      this.setState({
+        verificationStore: new VerificationStore(api, address, isTestnet)
+      });
+    }
   }
 
   componentWillUnmount () {
@@ -115,7 +118,8 @@ class Account extends Component {
         <Page>
           <Header
             account={ account }
-            balance={ balance } />
+            balance={ balance }
+          />
           <Transactions
             accounts={ accounts }
             address={ address } />
diff --git a/js/src/views/Application/Snackbar/snackbar.js b/js/src/views/Application/Snackbar/snackbar.js
index ac6e6b950..fdeb48c57 100644
--- a/js/src/views/Application/Snackbar/snackbar.js
+++ b/js/src/views/Application/Snackbar/snackbar.js
@@ -19,10 +19,17 @@ import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
 
 import { Snackbar as SnackbarMUI } from 'material-ui';
-import { darkBlack } from 'material-ui/styles/colors';
+import { darkBlack, grey800 } from 'material-ui/styles/colors';
 
 import { closeSnackbar } from '../../../redux/providers/snackbarActions';
 
+const bodyStyle = {
+  backgroundColor: darkBlack,
+  borderStyle: 'solid',
+  borderColor: grey800,
+  borderWidth: '1px 1px 0 1px'
+};
+
 class Snackbar extends Component {
   static propTypes = {
     closeSnackbar: PropTypes.func.isRequired,
@@ -40,7 +47,7 @@ class Snackbar extends Component {
         open={ open }
         message={ message }
         autoHideDuration={ cooldown }
-        bodyStyle={ { backgroundColor: darkBlack } }
+        bodyStyle={ bodyStyle }
         onRequestClose={ this.handleClose }
       />
     );
diff --git a/js/src/views/Application/Status/status.css b/js/src/views/Application/Status/status.css
index de043a1ad..8721bc4c2 100644
--- a/js/src/views/Application/Status/status.css
+++ b/js/src/views/Application/Status/status.css
@@ -15,45 +15,46 @@
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
 .status {
-  padding: 0.5em;
+  position: fixed;
+  bottom: 0;
+  left: 0;
+  right: 0;
+  z-index: 1000;
+  display: flex;
+  align-items: center;
+  padding: .4em .5em;
   font-size: x-small;
   color: #ccc;
-  background-color: rgba(0, 0, 0, 0.2)
-}
-
-.title {
-  margin: 0 0.5em 0 2em;
+  background-color: rgba(0, 0, 0, 0.8);
 }
 
 .enode {
   word-wrap: break-word;
-  float: right;
 }
 
 .enode > * {
   display: inline-block;
-  margin: 0.25em 0.5em;
-  vertical-align: top;
+  margin: 0 .25em;
+  vertical-align: middle;
 }
-
-.block {
+.enode > :last-child {
+  margin-right: 0;
 }
 
 .netinfo {
   display: flex;
+  flex-grow: 1;
   align-items: center;
-  color: #ddd;  
+  color: #ddd;
 }
 
 .netinfo > * {
-  display: inline-block;
   margin-left: 1em;
 }
 
 .network {
   padding: 0.25em 0.5em;
-  display: inline-block;
-  border-radius: 4px;
+  border-radius: .4em;
   line-height: 1.2;
   text-transform: uppercase;
 }
@@ -65,14 +66,3 @@
 .networktest {
   background: rgb(136, 0, 0);
 }
-
-.peers {
-}
-
-.version {
-  padding: 0.25em 0.5em;
-  float: left;
-}
-
-.syncing {
-}
diff --git a/js/src/views/Application/Status/status.js b/js/src/views/Application/Status/status.js
index 6417d5d28..287e7a6ee 100644
--- a/js/src/views/Application/Status/status.js
+++ b/js/src/views/Application/Status/status.js
@@ -46,7 +46,6 @@ class Status extends Component {
         <div className={ styles.version }>
           { clientVersion }
         </div>
-        { this.renderEnode() }
         <div className={ styles.netinfo }>
           <BlockStatus />
           <div className={ netStyle }>
@@ -56,6 +55,7 @@ class Status extends Component {
             { netPeers.active.toFormat() }/{ netPeers.connected.toFormat() }/{ netPeers.max.toFormat() } peers
           </div>
         </div>
+        { this.renderEnode() }
       </div>
     );
   }
@@ -73,7 +73,7 @@ class Status extends Component {
 
     return (
       <div className={ styles.enode }>
-        <CopyToClipboard data={ enode } />
+        <CopyToClipboard data={ enode } size={ 12 } />
         <div>{ abbreviated }</div>
       </div>
     );
diff --git a/js/src/views/Application/TabBar/tabBar.js b/js/src/views/Application/TabBar/tabBar.js
index c8fa0fd4a..ac8a28866 100644
--- a/js/src/views/Application/TabBar/tabBar.js
+++ b/js/src/views/Application/TabBar/tabBar.js
@@ -59,7 +59,7 @@ class Tab extends Component {
         selected={ active }
         icon={ view.icon }
         label={ label }
-        onClick={ this.handleClick }
+        onTouchTap={ this.handleClick }
       >
         { children }
       </MUITab>
diff --git a/js/src/views/Contract/Events/events.js b/js/src/views/Contract/Events/events.js
index 382a1c658..5558be499 100644
--- a/js/src/views/Contract/Events/events.js
+++ b/js/src/views/Contract/Events/events.js
@@ -16,7 +16,7 @@
 
 import React, { Component, PropTypes } from 'react';
 
-import { Container, ContainerTitle } from '../../../ui';
+import { Container } from '../../../ui';
 
 import Event from './Event';
 import styles from '../contract.css';
@@ -48,8 +48,7 @@ export default class Events extends Component {
     });
 
     return (
-      <Container>
-        <ContainerTitle title='events' />
+      <Container title='events'>
         <table className={ styles.events }>
           <tbody>{ list }</tbody>
         </table>
diff --git a/js/src/views/Contract/Queries/queries.js b/js/src/views/Contract/Queries/queries.js
index 99fe9ff2a..5c69ab76e 100644
--- a/js/src/views/Contract/Queries/queries.js
+++ b/js/src/views/Contract/Queries/queries.js
@@ -19,7 +19,7 @@ import React, { Component, PropTypes } from 'react';
 import { Card, CardTitle, CardText } from 'material-ui/Card';
 
 import InputQuery from './inputQuery';
-import { Container, ContainerTitle, Input, InputAddress } from '../../../ui';
+import { Container, Input, InputAddress } from '../../../ui';
 
 import styles from './queries.css';
 
@@ -55,8 +55,7 @@ export default class Queries extends Component {
       .map((fn) => this.renderInputQuery(fn));
 
     return (
-      <Container>
-        <ContainerTitle title='queries' />
+      <Container title='queries'>
         <div className={ styles.methods }>
           <div className={ styles.vMethods }>
             { noInputQueries }
diff --git a/js/src/views/Contract/contract.js b/js/src/views/Contract/contract.js
index 613bf70b9..54d06f228 100644
--- a/js/src/views/Contract/contract.js
+++ b/js/src/views/Contract/contract.js
@@ -132,7 +132,8 @@ class Contract extends Component {
         <Page>
           <Header
             account={ account }
-            balance={ balance } />
+            balance={ balance }
+          />
           <Queries
             contract={ contract }
             values={ queryValues } />
@@ -447,7 +448,10 @@ function mapStateToProps (state) {
 }
 
 function mapDispatchToProps (dispatch) {
-  return bindActionCreators({ newError, setVisibleAccounts }, dispatch);
+  return bindActionCreators({
+    newError,
+    setVisibleAccounts
+  }, dispatch);
 }
 
 export default connect(
diff --git a/js/src/views/ParityBar/parityBar.css b/js/src/views/ParityBar/parityBar.css
index 5b01613d4..dab138238 100644
--- a/js/src/views/ParityBar/parityBar.css
+++ b/js/src/views/ParityBar/parityBar.css
@@ -42,25 +42,26 @@
 }
 
 .expanded {
-  right: 16px;
-  max-height: 300px;
+  right: 1em;
   border-radius: 4px 4px 0 0;
-  overflow-y: auto;
   display: flex;
   flex-direction: column;
+  max-height: 19em;
 }
 
 .expanded .content {
   flex: 1;
-  overflow: auto;
+  overflow-y: auto;
+  overflow-x: hidden;
   display: flex;
   background: rgba(0, 0, 0, 0.8);
+  min-height: 16em;
 }
 
 .corner {
   position: absolute;
   bottom: 0;
-  right: 16px;
+  right: 1em;
   border-radius: 4px 4px 0 0;
 }
 
@@ -118,7 +119,7 @@
 }
 
 .header {
-  height: 36px;
+  height: 2em;
   padding: 0.5em 1em;
   background: rgba(0, 0, 0, 0.25);
   margin-bottom: 0;
@@ -148,6 +149,7 @@
 
 .actions {
   float: right;
+  margin-top: -2px;
 }
 
 .actions div {
diff --git a/js/src/views/Settings/Background/background.js b/js/src/views/Settings/Background/background.js
index 4b210881a..d771c4239 100644
--- a/js/src/views/Settings/Background/background.js
+++ b/js/src/views/Settings/Background/background.js
@@ -19,7 +19,7 @@ import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
 import NavigationRefresh from 'material-ui/svg-icons/navigation/refresh';
 
-import { Button, Container, ContainerTitle, ParityBackground } from '../../../ui';
+import { Button, Container, ParityBackground } from '../../../ui';
 
 import { updateBackground } from '../actions';
 
@@ -55,8 +55,7 @@ class Background extends Component {
 
   render () {
     return (
-      <Container>
-        <ContainerTitle title='Background Pattern' />
+      <Container title='Background Pattern'>
         <div className={ layout.layout }>
           <div className={ layout.overview }>
             <div>The background pattern you can see right now is unique to your Parity installation. It will change every time you create a new Signer token. This is so that decentralized applications cannot pretend to be trustworthy.</div>
diff --git a/js/src/views/Settings/Parity/parity.js b/js/src/views/Settings/Parity/parity.js
index abec8cc8a..e5e5233d0 100644
--- a/js/src/views/Settings/Parity/parity.js
+++ b/js/src/views/Settings/Parity/parity.js
@@ -17,7 +17,7 @@
 import React, { Component, PropTypes } from 'react';
 import { MenuItem } from 'material-ui';
 
-import { Select, Container, ContainerTitle } from '../../../ui';
+import { Select, Container } from '../../../ui';
 
 import layout from '../layout.css';
 
@@ -43,8 +43,7 @@ export default class Parity extends Component {
 
   render () {
     return (
-      <Container>
-        <ContainerTitle title='Parity' />
+      <Container title='Parity'>
         <div className={ layout.layout }>
           <div className={ layout.overview }>
             <div>Control the Parity node settings and mode of operation via this interface.</div>
diff --git a/js/src/views/Settings/Proxy/proxy.js b/js/src/views/Settings/Proxy/proxy.js
index 69e415d1f..3d2a607bc 100644
--- a/js/src/views/Settings/Proxy/proxy.js
+++ b/js/src/views/Settings/Proxy/proxy.js
@@ -16,7 +16,7 @@
 
 import React, { Component, PropTypes } from 'react';
 
-import { Container, ContainerTitle } from '../../../ui';
+import { Container } from '../../../ui';
 
 import layout from '../layout.css';
 import styles from './proxy.css';
@@ -31,8 +31,7 @@ export default class Proxy extends Component {
     const proxyurl = `${dappsUrl}/proxy/proxy.pac`;
 
     return (
-      <Container>
-        <ContainerTitle title='Proxy' />
+      <Container title='Proxy'>
         <div className={ layout.layout }>
           <div className={ layout.overview }>
             <div>The proxy setup allows you to access Parity and all associated decentralized applications via memorable addresses.</div>
diff --git a/js/src/views/Settings/Views/views.js b/js/src/views/Settings/Views/views.js
index a485876c8..e5fdedf5c 100644
--- a/js/src/views/Settings/Views/views.js
+++ b/js/src/views/Settings/Views/views.js
@@ -19,7 +19,7 @@ import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
 import { Checkbox } from 'material-ui';
 
-import { Container, ContainerTitle } from '../../../ui';
+import { Container } from '../../../ui';
 
 import { toggleView } from '../actions';
 
@@ -34,8 +34,7 @@ class Views extends Component {
 
   render () {
     return (
-      <Container>
-        <ContainerTitle title='Views' />
+      <Container title='Views'>
         <div className={ layout.layout }>
           <div className={ layout.overview }>
             <div>Manage the available application views, using only the parts of the application that is applicable to you.</div>
diff --git a/js/src/views/Signer/components/RequestFinished/requestFinished.js b/js/src/views/Signer/components/RequestFinished/requestFinished.js
index bce9e4038..fcca55540 100644
--- a/js/src/views/Signer/components/RequestFinished/requestFinished.js
+++ b/js/src/views/Signer/components/RequestFinished/requestFinished.js
@@ -25,7 +25,8 @@ export default class RequestFinished extends Component {
     result: PropTypes.any.isRequired,
     date: PropTypes.instanceOf(Date).isRequired,
     payload: PropTypes.oneOfType([
-      PropTypes.shape({ transaction: PropTypes.object.isRequired }),
+      PropTypes.shape({ signTransaction: PropTypes.object.isRequired }),
+      PropTypes.shape({ sendTransaction: PropTypes.object.isRequired }),
       PropTypes.shape({ sign: PropTypes.object.isRequired })
     ]).isRequired,
     msg: PropTypes.string,
@@ -58,9 +59,8 @@ export default class RequestFinished extends Component {
       );
     }
 
-    if (payload.transaction) {
-      const { transaction } = payload;
-
+    const transaction = payload.sendTransaction || payload.signTransaction;
+    if (transaction) {
       return (
         <TransactionFinished
           className={ className }
diff --git a/js/src/views/Signer/components/RequestPending/requestPending.js b/js/src/views/Signer/components/RequestPending/requestPending.js
index d8e2e0565..9ac00b5e4 100644
--- a/js/src/views/Signer/components/RequestPending/requestPending.js
+++ b/js/src/views/Signer/components/RequestPending/requestPending.js
@@ -27,7 +27,8 @@ export default class RequestPending extends Component {
     isSending: PropTypes.bool.isRequired,
     date: PropTypes.instanceOf(Date).isRequired,
     payload: PropTypes.oneOfType([
-      PropTypes.shape({ transaction: PropTypes.object.isRequired }),
+      PropTypes.shape({ signTransaction: PropTypes.object.isRequired }),
+      PropTypes.shape({ sendTransaction: PropTypes.object.isRequired }),
       PropTypes.shape({ sign: PropTypes.object.isRequired })
     ]).isRequired,
     className: PropTypes.string,
@@ -64,9 +65,8 @@ export default class RequestPending extends Component {
       );
     }
 
-    if (payload.transaction) {
-      const { transaction } = payload;
-
+    const transaction = payload.sendTransaction || payload.signTransaction;
+    if (transaction) {
       return (
         <TransactionPending
           className={ className }
diff --git a/js/src/views/Status/components/Debug/Debug.js b/js/src/views/Status/components/Debug/Debug.js
index 654662b84..d0e0c1d79 100644
--- a/js/src/views/Status/components/Debug/Debug.js
+++ b/js/src/views/Status/components/Debug/Debug.js
@@ -20,7 +20,7 @@ import AvPlay from 'material-ui/svg-icons/av/play-arrow';
 import AvReplay from 'material-ui/svg-icons/av/replay';
 import ReorderIcon from 'material-ui/svg-icons/action/reorder';
 
-import { Container, ContainerTitle } from '../../../../ui';
+import { Container } from '../../../../ui';
 
 import styles from './Debug.css';
 
@@ -42,9 +42,7 @@ export default class Debug extends Component {
     const { devLogsLevels } = nodeStatus;
 
     return (
-      <Container>
-        <ContainerTitle
-          title='Node Logs' />
+      <Container title='Node Logs'>
         { this.renderActions() }
         <h2 className={ styles.subheader }>
           { devLogsLevels || '-' }
diff --git a/js/webpack/app.js b/js/webpack/app.js
index 320410b2e..aff9b8aac 100644
--- a/js/webpack/app.js
+++ b/js/webpack/app.js
@@ -64,6 +64,10 @@ module.exports = {
         test: /\.json$/,
         use: [ 'json-loader' ]
       },
+      {
+        test: /\.ejs$/,
+        use: [ 'ejs-loader' ]
+      },
       {
         test: /\.html$/,
         use: [
diff --git a/json/Cargo.toml b/json/Cargo.toml
index 8f7b0c227..67303cc7e 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 = "0.0.96", optional = true}
+clippy = { version = "0.0.103", optional = true}
 
 [build-dependencies]
 serde_codegen = { version = "0.8", optional = true }
diff --git a/parity/blockchain.rs b/parity/blockchain.rs
index 0baeb1354..02d3e39fb 100644
--- a/parity/blockchain.rs
+++ b/parity/blockchain.rs
@@ -22,7 +22,7 @@ use std::thread::sleep;
 use std::sync::Arc;
 use rustc_serialize::hex::FromHex;
 use io::{PanicHandler, ForwardPanic};
-use util::{ToPretty, Uint};
+use util::{ToPretty, Uint, U256, H256, Address, Hashable};
 use rlp::PayloadInfo;
 use ethcore::service::ClientService;
 use ethcore::client::{Mode, DatabaseCompactionProfile, VMType, BlockImportError, BlockChainClient, BlockID};
@@ -65,6 +65,7 @@ impl FromStr for DataFormat {
 pub enum BlockchainCmd {
 	Import(ImportBlockchain),
 	Export(ExportBlockchain),
+	ExportState(ExportState),
 }
 
 #[derive(Debug, PartialEq)]
@@ -103,10 +104,31 @@ pub struct ExportBlockchain {
 	pub check_seal: bool,
 }
 
+#[derive(Debug, PartialEq)]
+pub struct ExportState {
+	pub spec: SpecType,
+	pub cache_config: CacheConfig,
+	pub dirs: Directories,
+	pub file_path: Option<String>,
+	pub format: Option<DataFormat>,
+	pub pruning: Pruning,
+	pub pruning_history: u64,
+	pub compaction: DatabaseCompactionProfile,
+	pub wal: bool,
+	pub fat_db: Switch,
+	pub tracing: Switch,
+	pub at: BlockID,
+	pub storage: bool,
+	pub code: bool,
+	pub min_balance: Option<U256>,
+	pub max_balance: Option<U256>,
+}
+
 pub fn execute(cmd: BlockchainCmd) -> Result<String, String> {
 	match cmd {
 		BlockchainCmd::Import(import_cmd) => execute_import(import_cmd),
 		BlockchainCmd::Export(export_cmd) => execute_export(export_cmd),
+		BlockchainCmd::ExportState(export_cmd) => execute_export_state(export_cmd),
 	}
 }
 
@@ -245,6 +267,7 @@ fn execute_import(cmd: ImportBlockchain) -> Result<String, String> {
 	// save user defaults
 	user_defaults.pruning = algorithm;
 	user_defaults.tracing = tracing;
+	user_defaults.fat_db = fat_db;
 	try!(user_defaults.save(&user_defaults_path));
 
 	let report = client.report();
@@ -261,23 +284,28 @@ fn execute_import(cmd: ImportBlockchain) -> Result<String, String> {
 	).into())
 }
 
-fn execute_export(cmd: ExportBlockchain) -> Result<String, String> {
-	// Setup panic handler
-	let panic_handler = PanicHandler::new_in_arc();
+fn start_client(
+	dirs: Directories,
+	spec: SpecType,
+	pruning: Pruning,
+	pruning_history: u64,
+	tracing: Switch,
+	fat_db: Switch,
+	compaction: DatabaseCompactionProfile,
+	wal: bool,
+	cache_config: CacheConfig) -> Result<ClientService, String> {
 
 	// create dirs used by parity
-	try!(cmd.dirs.create_dirs(false, false));
-
-	let format = cmd.format.unwrap_or_default();
+	try!(dirs.create_dirs(false, false));
 
 	// load spec file
-	let spec = try!(cmd.spec.spec());
+	let spec = try!(spec.spec());
 
 	// load genesis hash
 	let genesis_hash = spec.genesis_header().hash();
 
 	// database paths
-	let db_dirs = cmd.dirs.database(genesis_hash, spec.fork_name.clone());
+	let db_dirs = dirs.database(genesis_hash, spec.fork_name.clone());
 
 	// user defaults path
 	let user_defaults_path = db_dirs.user_defaults_path();
@@ -288,34 +316,42 @@ fn execute_export(cmd: ExportBlockchain) -> Result<String, String> {
 	fdlimit::raise_fd_limit();
 
 	// select pruning algorithm
-	let algorithm = cmd.pruning.to_algorithm(&user_defaults);
+	let algorithm = pruning.to_algorithm(&user_defaults);
 
 	// check if tracing is on
-	let tracing = try!(tracing_switch_to_bool(cmd.tracing, &user_defaults));
+	let tracing = try!(tracing_switch_to_bool(tracing, &user_defaults));
 
 	// check if fatdb is on
-	let fat_db = try!(fatdb_switch_to_bool(cmd.fat_db, &user_defaults, algorithm));
+	let fat_db = try!(fatdb_switch_to_bool(fat_db, &user_defaults, algorithm));
 
 	// prepare client and snapshot paths.
 	let client_path = db_dirs.client_path(algorithm);
 	let snapshot_path = db_dirs.snapshot_path();
 
 	// execute upgrades
-	try!(execute_upgrades(&db_dirs, algorithm, cmd.compaction.compaction_profile(db_dirs.fork_path().as_path())));
+	try!(execute_upgrades(&db_dirs, algorithm, compaction.compaction_profile(db_dirs.fork_path().as_path())));
 
 	// prepare client config
-	let client_config = to_client_config(&cmd.cache_config, Mode::Active, tracing, fat_db, cmd.compaction, cmd.wal, VMType::default(), "".into(), algorithm, cmd.pruning_history, cmd.check_seal);
+	let client_config = to_client_config(&cache_config, Mode::Active, tracing, fat_db, compaction, wal, VMType::default(), "".into(), algorithm, pruning_history, true);
 
 	let service = try!(ClientService::start(
 		client_config,
 		&spec,
 		&client_path,
 		&snapshot_path,
-		&cmd.dirs.ipc_path(),
+		&dirs.ipc_path(),
 		Arc::new(Miner::with_spec(&spec)),
 	).map_err(|e| format!("Client service error: {:?}", e)));
 
 	drop(spec);
+	Ok(service)
+}
+
+fn execute_export(cmd: ExportBlockchain) -> Result<String, String> {
+	// Setup panic handler
+	let service = try!(start_client(cmd.dirs, cmd.spec, cmd.pruning, cmd.pruning_history, cmd.tracing, cmd.fat_db, cmd.compaction, cmd.wal, cmd.cache_config));
+	let panic_handler = PanicHandler::new_in_arc();
+	let format = cmd.format.unwrap_or_default();
 
 	panic_handler.forward_from(&service);
 	let client = service.client();
@@ -329,6 +365,9 @@ fn execute_export(cmd: ExportBlockchain) -> Result<String, String> {
 	let to = try!(client.block_number(cmd.to_block).ok_or("To block could not be found"));
 
 	for i in from..(to + 1) {
+		if i % 10000 == 0 {
+			info!("#{}", i);
+		}
 		let b = try!(client.block(BlockID::Number(i)).ok_or("Error exporting incomplete chain"));
 		match format {
 			DataFormat::Binary => { out.write(&b).expect("Couldn't write to stream."); }
@@ -339,6 +378,85 @@ fn execute_export(cmd: ExportBlockchain) -> Result<String, String> {
 	Ok("Export completed.".into())
 }
 
+fn execute_export_state(cmd: ExportState) -> Result<String, String> {
+	// Setup panic handler
+	let service = try!(start_client(cmd.dirs, cmd.spec, cmd.pruning, cmd.pruning_history, cmd.tracing, cmd.fat_db, cmd.compaction, cmd.wal, cmd.cache_config));
+	let panic_handler = PanicHandler::new_in_arc();
+
+	panic_handler.forward_from(&service);
+	let client = service.client();
+
+	let mut out: Box<io::Write> = match cmd.file_path {
+		Some(f) => Box::new(try!(fs::File::create(&f).map_err(|_| format!("Cannot write to file given: {}", f)))),
+		None => Box::new(io::stdout()),
+	};
+
+	let mut last: Option<Address> = None;
+	let at = cmd.at;
+	let mut i = 0usize;
+
+	out.write_fmt(format_args!("{{ \"state\": [", )).expect("Couldn't write to stream.");
+	loop {
+		let accounts = try!(client.list_accounts(at, last.as_ref(), 1000).ok_or("Specified block not found"));
+		if accounts.is_empty() {
+			break;
+		}
+
+		for account in accounts.into_iter() {
+			let balance = client.balance(&account, at).unwrap_or_else(U256::zero);
+			if cmd.min_balance.map_or(false, |m| balance < m) || cmd.max_balance.map_or(false, |m| balance > m) {
+				last = Some(account);
+				continue; //filtered out
+			}
+
+			if i != 0 {
+				out.write(b",").expect("Write error");
+			}
+			out.write_fmt(format_args!("\n\"0x{}\": {{\"balance\": \"{:x}\", \"nonce\": \"{:x}\"", account.hex(), balance, client.nonce(&account, at).unwrap_or_else(U256::zero))).expect("Write error");
+			let code = client.code(&account, at).unwrap_or(None).unwrap_or_else(Vec::new);
+			if !code.is_empty() {
+				out.write_fmt(format_args!(", \"code_hash\": \"0x{}\"", code.sha3().hex())).expect("Write error");
+				if cmd.code {
+					out.write_fmt(format_args!(", \"code\": \"{}\"", code.to_hex())).expect("Write error");
+				}
+			}
+			let storage_root = client.storage_root(&account, at).unwrap_or(::util::SHA3_NULL_RLP);
+			if storage_root != ::util::SHA3_NULL_RLP {
+				out.write_fmt(format_args!(", \"storage_root\": \"0x{}\"", storage_root.hex())).expect("Write error");
+				if cmd.storage {
+					out.write_fmt(format_args!(", \"storage\": {{")).expect("Write error");
+					let mut last_storage: Option<H256> = None;
+					loop {
+						let keys = try!(client.list_storage(at, &account, last_storage.as_ref(), 1000).ok_or("Specified block not found"));
+						if keys.is_empty() {
+							break;
+						}
+
+						let mut si = 0;
+						for key in keys.into_iter() {
+							if si != 0 {
+								out.write(b",").expect("Write error");
+							}
+							out.write_fmt(format_args!("\n\t\"0x{}\": \"0x{}\"", key.hex(), client.storage_at(&account, &key, at).unwrap_or_else(Default::default).hex())).expect("Write error");
+							si += 1;
+							last_storage = Some(key);
+						}
+					}
+					out.write(b"\n}").expect("Write error");
+				}
+			}
+			out.write(b"}").expect("Write error");
+			i += 1;
+			if i % 10000 == 0 {
+				info!("Account #{}", i);
+			}
+			last = Some(account);
+		}
+	}
+	out.write_fmt(format_args!("\n]}}")).expect("Write error");
+	Ok("Export completed.".into())
+}
+
 #[cfg(test)]
 mod test {
 	use super::DataFormat;
diff --git a/parity/cli/mod.rs b/parity/cli/mod.rs
index 3f67cf1fa..d33c58d9d 100644
--- a/parity/cli/mod.rs
+++ b/parity/cli/mod.rs
@@ -26,6 +26,8 @@ usage! {
 		cmd_new: bool,
 		cmd_list: bool,
 		cmd_export: bool,
+		cmd_blocks: bool,
+		cmd_state: bool,
 		cmd_import: bool,
 		cmd_signer: bool,
 		cmd_new_token: bool,
@@ -246,6 +248,10 @@ usage! {
 		flag_to: String = "latest", or |_| None,
 		flag_format: Option<String> = None, or |_| None,
 		flag_no_seal_check: bool = false, or |_| None,
+		flag_no_storage: bool = false, or |_| None,
+		flag_no_code: bool = false, or |_| None,
+		flag_min_balance: Option<String> = None, or |_| None,
+		flag_max_balance: Option<String> = None, or |_| None,
 
 		// -- Snapshot Optons
 		flag_at: String = "latest", or |_| None,
@@ -484,6 +490,8 @@ mod tests {
 			cmd_new: false,
 			cmd_list: false,
 			cmd_export: false,
+			cmd_state: false,
+			cmd_blocks: false,
 			cmd_import: false,
 			cmd_signer: false,
 			cmd_new_token: false,
@@ -600,6 +608,10 @@ mod tests {
 			flag_to: "latest".into(),
 			flag_format: None,
 			flag_no_seal_check: false,
+			flag_no_code: false,
+			flag_no_storage: false,
+			flag_min_balance: None,
+			flag_max_balance: None,
 
 			// -- Snapshot Optons
 			flag_at: "latest".into(),
diff --git a/parity/cli/usage.txt b/parity/cli/usage.txt
index fe0824dfe..b67af6110 100644
--- a/parity/cli/usage.txt
+++ b/parity/cli/usage.txt
@@ -10,7 +10,7 @@ Usage:
   parity account import <path>... [options]
   parity wallet import <path> --password FILE [options]
   parity import [ <file> ] [options]
-  parity export [ <file> ] [options]
+  parity export (blocks | state) [ <file> ] [options]
   parity signer new-token [options]
   parity snapshot <file> [options]
   parity restore [ <file> ] [options]
@@ -271,6 +271,16 @@ Import/Export Options:
                            one of 'hex' and 'binary'.
                            (default: {flag_format:?} = Import: auto, Export: binary)
   --no-seal-check          Skip block seal check. (default: {flag_no_seal_check})
+  --at BLOCK               Export state 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: {flag_at})
+  --no-storage             Don't export account storge. (default: {flag_no_storage})
+  --no-code                Don't export account code. (default: {flag_no_code})
+  --min-balance WEI        Don't export accounts with balance less than specified.
+                           (default: {flag_min_balance:?})
+  --max-balance WEI        Don't export accounts with balance greater than specified.
+                           (default: {flag_max_balance:?})
 
 Snapshot Options:
   --at BLOCK               Take a snapshot at the given block, which may be an
diff --git a/parity/configuration.rs b/parity/configuration.rs
index ecf47ddad..c4a54f747 100644
--- a/parity/configuration.rs
+++ b/parity/configuration.rs
@@ -37,7 +37,7 @@ use dir::Directories;
 use dapps::Configuration as DappsConfiguration;
 use signer::{Configuration as SignerConfiguration};
 use run::RunCmd;
-use blockchain::{BlockchainCmd, ImportBlockchain, ExportBlockchain, DataFormat};
+use blockchain::{BlockchainCmd, ImportBlockchain, ExportBlockchain, ExportState, DataFormat};
 use presale::ImportWallet;
 use account::{AccountCmd, NewAccount, ImportAccounts, ImportFromGethAccounts};
 use snapshot::{self, SnapshotCommand};
@@ -161,23 +161,47 @@ impl Configuration {
 			};
 			Cmd::Blockchain(BlockchainCmd::Import(import_cmd))
 		} else if self.args.cmd_export {
-			let export_cmd = ExportBlockchain {
-				spec: spec,
-				cache_config: cache_config,
-				dirs: dirs,
-				file_path: self.args.arg_file.clone(),
-				format: format,
-				pruning: pruning,
-				pruning_history: pruning_history,
-				compaction: compaction,
-				wal: wal,
-				tracing: tracing,
-				fat_db: fat_db,
-				from_block: try!(to_block_id(&self.args.flag_from)),
-				to_block: try!(to_block_id(&self.args.flag_to)),
-				check_seal: !self.args.flag_no_seal_check,
-			};
-			Cmd::Blockchain(BlockchainCmd::Export(export_cmd))
+			if self.args.cmd_blocks {
+				let export_cmd = ExportBlockchain {
+					spec: spec,
+					cache_config: cache_config,
+					dirs: dirs,
+					file_path: self.args.arg_file.clone(),
+					format: format,
+					pruning: pruning,
+					pruning_history: pruning_history,
+					compaction: compaction,
+					wal: wal,
+					tracing: tracing,
+					fat_db: fat_db,
+					from_block: try!(to_block_id(&self.args.flag_from)),
+					to_block: try!(to_block_id(&self.args.flag_to)),
+					check_seal: !self.args.flag_no_seal_check,
+				};
+				Cmd::Blockchain(BlockchainCmd::Export(export_cmd))
+			} else if self.args.cmd_state {
+				let export_cmd = ExportState {
+					spec: spec,
+					cache_config: cache_config,
+					dirs: dirs,
+					file_path: self.args.arg_file.clone(),
+					format: format,
+					pruning: pruning,
+					pruning_history: pruning_history,
+					compaction: compaction,
+					wal: wal,
+					tracing: tracing,
+					fat_db: fat_db,
+					at: try!(to_block_id(&self.args.flag_at)),
+					storage: !self.args.flag_no_storage,
+					code: !self.args.flag_no_code,
+					min_balance: self.args.flag_min_balance.and_then(|s| to_u256(&s).ok()),
+					max_balance: self.args.flag_max_balance.and_then(|s| to_u256(&s).ok()),
+				};
+				Cmd::Blockchain(BlockchainCmd::ExportState(export_cmd))
+			} else {
+				unreachable!();
+			}
 		} else if self.args.cmd_snapshot {
 			let snapshot_cmd = SnapshotCommand {
 				cache_config: cache_config,
@@ -690,7 +714,7 @@ mod tests {
 	use helpers::{replace_home, default_network_config};
 	use run::RunCmd;
 	use signer::{Configuration as SignerConfiguration};
-	use blockchain::{BlockchainCmd, ImportBlockchain, ExportBlockchain, DataFormat};
+	use blockchain::{BlockchainCmd, ImportBlockchain, ExportBlockchain, DataFormat, ExportState};
 	use presale::ImportWallet;
 	use account::{AccountCmd, NewAccount, ImportAccounts};
 	use devtools::{RandomTempPath};
@@ -779,7 +803,7 @@ mod tests {
 
 	#[test]
 	fn test_command_blockchain_export() {
-		let args = vec!["parity", "export", "blockchain.json"];
+		let args = vec!["parity", "export", "blocks", "blockchain.json"];
 		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap().cmd, Cmd::Blockchain(BlockchainCmd::Export(ExportBlockchain {
 			spec: Default::default(),
@@ -799,9 +823,33 @@ mod tests {
 		})));
 	}
 
+	#[test]
+	fn test_command_state_export() {
+		let args = vec!["parity", "export", "state", "state.json"];
+		let conf = parse(&args);
+		assert_eq!(conf.into_command().unwrap().cmd, Cmd::Blockchain(BlockchainCmd::ExportState(ExportState {
+			spec: Default::default(),
+			cache_config: Default::default(),
+			dirs: Default::default(),
+			file_path: Some("state.json".into()),
+			pruning: Default::default(),
+			pruning_history: 64,
+			format: Default::default(),
+			compaction: Default::default(),
+			wal: true,
+			tracing: Default::default(),
+			fat_db: Default::default(),
+			at: BlockID::Latest,
+			storage: true,
+			code: true,
+			min_balance: None,
+			max_balance: None,
+		})));
+	}
+
 	#[test]
 	fn test_command_blockchain_export_with_custom_format() {
-		let args = vec!["parity", "export", "--format", "hex", "blockchain.json"];
+		let args = vec!["parity", "export", "blocks", "--format", "hex", "blockchain.json"];
 		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap().cmd, Cmd::Blockchain(BlockchainCmd::Export(ExportBlockchain {
 			spec: Default::default(),
diff --git a/parity/params.rs b/parity/params.rs
index 28233400e..3ce07e889 100644
--- a/parity/params.rs
+++ b/parity/params.rs
@@ -257,17 +257,13 @@ pub fn tracing_switch_to_bool(switch: Switch, user_defaults: &UserDefaults) -> R
 	}
 }
 
-pub fn fatdb_switch_to_bool(switch: Switch, user_defaults: &UserDefaults, algorithm: Algorithm) -> Result<bool, String> {
+pub fn fatdb_switch_to_bool(switch: Switch, user_defaults: &UserDefaults, _algorithm: Algorithm) -> Result<bool, String> {
 	let result = match (user_defaults.is_first_launch, switch, user_defaults.fat_db) {
 		(false, Switch::On, false) => Err("FatDB resync required".into()),
 		(_, Switch::On, _) => Ok(true),
 		(_, Switch::Off, _) => Ok(false),
 		(_, Switch::Auto, def) => Ok(def),
 	};
-
-	if result.clone().unwrap_or(false) && algorithm != Algorithm::Archive {
-		return Err("Fat DB is not supported with the chosen pruning option. Please rerun with `--pruning=archive`".into());
-	}
 	result
 }
 
diff --git a/parity/run.rs b/parity/run.rs
index f56ba5b92..f977c450c 100644
--- a/parity/run.rs
+++ b/parity/run.rs
@@ -156,7 +156,7 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 	// get the mode
 	let mode = try!(mode_switch_to_bool(cmd.mode, &user_defaults));
 	trace!(target: "mode", "mode is {:?}", mode);
-	let network_enabled = match &mode { &Mode::Dark(_) | &Mode::Off => false, _ => true, };
+	let network_enabled = match mode { Mode::Dark(_) | Mode::Off => false, _ => true, };
 
 	// prepare client and snapshot paths.
 	let client_path = db_dirs.client_path(algorithm);
@@ -219,7 +219,7 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 	// create client config
 	let client_config = to_client_config(
 		&cmd.cache_config,
-		mode,
+		mode.clone(),
 		tracing,
 		fat_db,
 		cmd.compaction,
@@ -354,6 +354,8 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 	// save user defaults
 	user_defaults.pruning = algorithm;
 	user_defaults.tracing = tracing;
+	user_defaults.fat_db = fat_db;
+	user_defaults.mode = mode;
 	try!(user_defaults.save(&user_defaults_path));
 
 	let on_mode_change = move |mode: &Mode| {
diff --git a/rpc/Cargo.toml b/rpc/Cargo.toml
index 4a8c4d76a..8598372f8 100644
--- a/rpc/Cargo.toml
+++ b/rpc/Cargo.toml
@@ -29,7 +29,7 @@ fetch = { path = "../util/fetch" }
 rustc-serialize = "0.3"
 transient-hashmap = "0.1"
 serde_macros = { version = "0.8.0", optional = true }
-clippy = { version = "0.0.96", optional = true}
+clippy = { version = "0.0.103", 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/impls/parity.rs b/rpc/src/v1/impls/parity.rs
index 1fdcbdef8..74f467e5e 100644
--- a/rpc/src/v1/impls/parity.rs
+++ b/rpc/src/v1/impls/parity.rs
@@ -28,7 +28,6 @@ use ethstore::random_phrase;
 use ethsync::{SyncProvider, ManageNetwork};
 use ethcore::miner::MinerService;
 use ethcore::client::{MiningBlockChainClient};
-use ethcore::ids::BlockID;
 use ethcore::mode::Mode;
 use ethcore::account_provider::AccountProvider;
 
@@ -38,9 +37,11 @@ use v1::types::{
 	Bytes, U256, H160, H256, H512,
 	Peers, Transaction, RpcSettings, Histogram,
 	TransactionStats, LocalTransactionStatus,
+	BlockNumber,
 };
 use v1::helpers::{errors, SigningQueue, SignerService, NetworkSettings};
 use v1::helpers::dispatch::DEFAULT_MAC;
+use v1::helpers::auto_args::Trailing;
 
 /// Parity implementation.
 pub struct ParityClient<C, M, S: ?Sized> where
@@ -234,19 +235,20 @@ impl<C, M, S: ?Sized> Parity for ParityClient<C, M, S> where
 		Ok(Brain::new(phrase).generate().unwrap().address().into())
 	}
 
-	fn list_accounts(&self) -> Result<Option<Vec<H160>>, Error> {
+	fn list_accounts(&self, count: u64, after: Option<H160>, block_number: Trailing<BlockNumber>) -> Result<Option<Vec<H160>>, Error> {
 		try!(self.active());
 
 		Ok(take_weak!(self.client)
-			.list_accounts(BlockID::Latest)
+			.list_accounts(block_number.0.into(), after.map(Into::into).as_ref(), count)
 			.map(|a| a.into_iter().map(Into::into).collect()))
 	}
 
-	fn list_storage_keys(&self, _address: H160) -> Result<Option<Vec<H256>>, Error> {
+	fn list_storage_keys(&self, address: H160, count: u64, after: Option<H256>, block_number: Trailing<BlockNumber>) -> Result<Option<Vec<H256>>, Error> {
 		try!(self.active());
 
-		// TODO: implement this
-		Ok(None)
+		Ok(take_weak!(self.client)
+			.list_storage(block_number.0.into(), &address.into(), after.map(Into::into).as_ref(), count)
+			.map(|a| a.into_iter().map(Into::into).collect()))
 	}
 
 	fn encrypt_message(&self, key: H512, phrase: Bytes) -> Result<Bytes, Error> {
diff --git a/rpc/src/v1/tests/mocked/signer.rs b/rpc/src/v1/tests/mocked/signer.rs
index e2ba580e0..447c809cd 100644
--- a/rpc/src/v1/tests/mocked/signer.rs
+++ b/rpc/src/v1/tests/mocked/signer.rs
@@ -89,7 +89,7 @@ fn should_return_list_of_items_to_confirm() {
 	let request = r#"{"jsonrpc":"2.0","method":"signer_requestsToConfirm","params":[],"id":1}"#;
 	let response = concat!(
 		r#"{"jsonrpc":"2.0","result":["#,
-		r#"{"id":"0x1","payload":{"transaction":{"data":"0x","from":"0x0000000000000000000000000000000000000001","gas":"0x989680","gasPrice":"0x2710","nonce":null,"to":"0xd46e8dd67c5d32be8058bb8eb970870f07244567","value":"0x1"}}},"#,
+		r#"{"id":"0x1","payload":{"sendTransaction":{"data":"0x","from":"0x0000000000000000000000000000000000000001","gas":"0x989680","gasPrice":"0x2710","nonce":null,"to":"0xd46e8dd67c5d32be8058bb8eb970870f07244567","value":"0x1"}}},"#,
 		r#"{"id":"0x2","payload":{"sign":{"address":"0x0000000000000000000000000000000000000001","hash":"0x0000000000000000000000000000000000000000000000000000000000000005"}}}"#,
 		r#"],"id":1}"#
 	);
diff --git a/rpc/src/v1/traits/parity.rs b/rpc/src/v1/traits/parity.rs
index b4df594e8..18440b654 100644
--- a/rpc/src/v1/traits/parity.rs
+++ b/rpc/src/v1/traits/parity.rs
@@ -18,11 +18,12 @@
 use jsonrpc_core::Error;
 
 use std::collections::BTreeMap;
-use v1::helpers::auto_args::Wrap;
+use v1::helpers::auto_args::{Wrap, Trailing};
 use v1::types::{
 	H160, H256, H512, U256, Bytes,
 	Peers, Transaction, RpcSettings, Histogram,
 	TransactionStats, LocalTransactionStatus,
+	BlockNumber
 };
 
 build_rpc_trait! {
@@ -103,12 +104,12 @@ build_rpc_trait! {
 
 		/// Returns all addresses if Fat DB is enabled (`--fat-db`), or null if not.
 		#[rpc(name = "parity_listAccounts")]
-		fn list_accounts(&self) -> Result<Option<Vec<H160>>, Error>;
+		fn list_accounts(&self, u64, Option<H160>, Trailing<BlockNumber>) -> Result<Option<Vec<H160>>, Error>;
 
 		/// Returns all storage keys of the given address (first parameter) if Fat DB is enabled (`--fat-db`),
 		/// or null if not.
 		#[rpc(name = "parity_listStorageKeys")]
-		fn list_storage_keys(&self, H160) -> Result<Option<Vec<H256>>, Error>;
+		fn list_storage_keys(&self, H160, u64, Option<H256>, Trailing<BlockNumber>) -> Result<Option<Vec<H256>>, Error>;
 
 		/// Encrypt some data with a public key under ECIES.
 		/// First parameter is the 512-byte destination public key, second is the message.
diff --git a/rpc/src/v1/types/confirmations.rs b/rpc/src/v1/types/confirmations.rs
index bbbad83f3..d8cfa14d6 100644
--- a/rpc/src/v1/types/confirmations.rs
+++ b/rpc/src/v1/types/confirmations.rs
@@ -105,10 +105,10 @@ impl Serialize for ConfirmationResponse {
 #[derive(Debug, Clone, Eq, PartialEq, Hash, Serialize)]
 pub enum ConfirmationPayload {
 	/// Send Transaction
-	#[serde(rename="transaction")]
+	#[serde(rename="sendTransaction")]
 	SendTransaction(TransactionRequest),
 	/// Sign Transaction
-	#[serde(rename="transaction")]
+	#[serde(rename="signTransaction")]
 	SignTransaction(TransactionRequest),
 	/// Signature
 	#[serde(rename="sign")]
@@ -221,7 +221,49 @@ mod tests {
 
 		// when
 		let res = serde_json::to_string(&ConfirmationRequest::from(request));
-		let expected = r#"{"id":"0xf","payload":{"transaction":{"from":"0x0000000000000000000000000000000000000000","to":null,"gasPrice":"0x2710","gas":"0x3a98","value":"0x186a0","data":"0x010203","nonce":"0x1"}}}"#;
+		let expected = r#"{"id":"0xf","payload":{"sendTransaction":{"from":"0x0000000000000000000000000000000000000000","to":null,"gasPrice":"0x2710","gas":"0x3a98","value":"0x186a0","data":"0x010203","nonce":"0x1"}}}"#;
+
+		// then
+		assert_eq!(res.unwrap(), expected.to_owned());
+	}
+
+	#[test]
+	fn should_serialize_sign_transaction_confirmation() {
+		// given
+		let request = helpers::ConfirmationRequest {
+			id: 15.into(),
+			payload: helpers::ConfirmationPayload::SignTransaction(helpers::FilledTransactionRequest {
+				from: 0.into(),
+				to: None,
+				gas: 15_000.into(),
+				gas_price: 10_000.into(),
+				value: 100_000.into(),
+				data: vec![1, 2, 3],
+				nonce: Some(1.into()),
+			}),
+		};
+
+		// when
+		let res = serde_json::to_string(&ConfirmationRequest::from(request));
+		let expected = r#"{"id":"0xf","payload":{"signTransaction":{"from":"0x0000000000000000000000000000000000000000","to":null,"gasPrice":"0x2710","gas":"0x3a98","value":"0x186a0","data":"0x010203","nonce":"0x1"}}}"#;
+
+		// then
+		assert_eq!(res.unwrap(), expected.to_owned());
+	}
+
+	#[test]
+	fn should_serialize_decrypt_confirmation() {
+		// given
+		let request = helpers::ConfirmationRequest {
+			id: 15.into(),
+			payload: helpers::ConfirmationPayload::Decrypt(
+				10.into(), vec![1, 2, 3].into(),
+			),
+		};
+
+		// when
+		let res = serde_json::to_string(&ConfirmationRequest::from(request));
+		let expected = r#"{"id":"0xf","payload":{"decrypt":{"address":"0x000000000000000000000000000000000000000a","msg":"0x010203"}}}"#;
 
 		// then
 		assert_eq!(res.unwrap(), expected.to_owned());
diff --git a/signer/Cargo.toml b/signer/Cargo.toml
index 2a3742ec8..4b56ec474 100644
--- a/signer/Cargo.toml
+++ b/signer/Cargo.toml
@@ -23,7 +23,7 @@ ethcore-rpc = { path = "../rpc" }
 ethcore-devtools = { path = "../devtools" }
 parity-ui = { path = "../dapps/ui", version = "1.4", optional = true }
 
-clippy = { version = "0.0.96", optional = true}
+clippy = { version = "0.0.103", optional = true}
 
 [features]
 dev = ["clippy"]
diff --git a/signer/src/authcode_store.rs b/signer/src/authcode_store.rs
index cbb78db41..55c0fcb15 100644
--- a/signer/src/authcode_store.rs
+++ b/signer/src/authcode_store.rs
@@ -80,6 +80,7 @@ pub struct AuthCodes<T: TimeProvider = DefaultTimeProvider> {
 impl AuthCodes<DefaultTimeProvider> {
 
 	/// Reads `AuthCodes` from file and creates new instance using `DefaultTimeProvider`.
+	#[cfg_attr(feature="dev", allow(single_char_pattern))]
 	pub fn from_file(file: &Path) -> io::Result<AuthCodes> {
 		let content = {
 			if let Ok(mut file) = fs::File::open(file) {
@@ -128,7 +129,7 @@ impl<T: TimeProvider> AuthCodes<T> {
 		let mut file = try!(fs::File::create(file));
 		let content = self.codes.iter().map(|code| {
 			let mut data = vec![code.code.clone(), encode_time(code.created_at.clone())];
-			if let Some(used_at) = code.last_used_at.clone() {
+			if let Some(used_at) = code.last_used_at {
 				data.push(encode_time(used_at));
 			}
 			data.join(SEPARATOR)
diff --git a/signer/src/ws_server/session.rs b/signer/src/ws_server/session.rs
index 5adc3fa80..13d253587 100644
--- a/signer/src/ws_server/session.rs
+++ b/signer/src/ws_server/session.rs
@@ -99,7 +99,7 @@ fn auth_is_valid(codes_path: &Path, protocols: ws::Result<Vec<&str>>) -> bool {
 
 							let res = codes.is_valid(&auth, time);
 							// make sure to save back authcodes - it might have been modified
-							if let Err(_) = codes.to_file(codes_path) {
+							if codes.to_file(codes_path).is_err() {
 								warn!(target: "signer", "Couldn't save authorization codes to file.");
 							}
 							res
diff --git a/sync/Cargo.toml b/sync/Cargo.toml
index c7e30d6a5..738f5f55c 100644
--- a/sync/Cargo.toml
+++ b/sync/Cargo.toml
@@ -17,7 +17,7 @@ ethcore-network = { path = "../util/network" }
 ethcore-io = { path = "../util/io" }
 ethcore = { path = "../ethcore" }
 rlp = { path = "../util/rlp" }
-clippy = { version = "0.0.96", optional = true}
+clippy = { version = "0.0.103", 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 bfc5f7156..bd312c9ee 100644
--- a/sync/src/chain.rs
+++ b/sync/src/chain.rs
@@ -625,7 +625,7 @@ impl ChainSync {
 		Ok(())
 	}
 
-	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
+	#[cfg_attr(feature="dev", allow(cyclomatic_complexity, needless_borrow))]
 	/// Called by peer once it has new block headers during sync
 	fn on_peer_block_headers(&mut self, io: &mut SyncIo, peer_id: PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
 		let confirmed = match self.peers.get_mut(&peer_id) {
@@ -1174,7 +1174,7 @@ impl ChainSync {
 					}
 				},
 				SyncState::SnapshotData => {
-					if let RestorationStatus::Ongoing { state_chunks: _, block_chunks: _, state_chunks_done, block_chunks_done, } = io.snapshot_service().status() {
+					if let RestorationStatus::Ongoing { state_chunks_done, block_chunks_done, .. } = io.snapshot_service().status() {
 						if self.snapshot.done_chunks() - (state_chunks_done + block_chunks_done) as usize > MAX_SNAPSHOT_CHUNKS_DOWNLOAD_AHEAD {
 							trace!(target: "sync", "Snapshot queue full, pausing sync");
 							self.state = SyncState::SnapshotWaiting;
@@ -1426,7 +1426,10 @@ impl ChainSync {
 		packet.append(&chain.best_block_hash);
 		packet.append(&chain.genesis_hash);
 		if warp_protocol {
-			let manifest = io.snapshot_service().manifest();
+			let manifest = match self.old_blocks.is_some() {
+				true => None,
+				false => io.snapshot_service().manifest(),
+			};
 			let block_number = manifest.as_ref().map_or(0, |m| m.block_number);
 			let manifest_hash = manifest.map_or(H256::new(), |m| m.into_rlp().sha3());
 			packet.append(&manifest_hash);
@@ -1745,7 +1748,7 @@ impl ChainSync {
 					self.restart(io);
 					self.continue_sync(io);
 				},
-				RestorationStatus::Ongoing { state_chunks: _, block_chunks: _, state_chunks_done, block_chunks_done, } => {
+				RestorationStatus::Ongoing { state_chunks_done, block_chunks_done, .. } => {
 					if !self.snapshot.is_complete() && self.snapshot.done_chunks() - (state_chunks_done + block_chunks_done) as usize <= MAX_SNAPSHOT_CHUNKS_DOWNLOAD_AHEAD {
 						trace!(target:"sync", "Resuming snapshot sync");
 						self.state = SyncState::SnapshotData;
@@ -1999,12 +2002,16 @@ impl ChainSync {
 
 #[cfg(test)]
 mod tests {
+	use std::collections::{HashSet, VecDeque};
 	use tests::helpers::*;
 	use tests::snapshot::TestSnapshotService;
+	use util::{U256, RwLock};
+	use util::sha3::Hashable;
+	use util::hash::{H256, FixedHash};
+	use util::bytes::Bytes;
+	use rlp::{Rlp, RlpStream, UntrustedRlp, View, Stream};
 	use super::*;
 	use ::SyncConfig;
-	use util::*;
-	use rlp::*;
 	use super::{PeerInfo, PeerAsking};
 	use ethcore::views::BlockView;
 	use ethcore::header::*;
diff --git a/sync/src/tests/helpers.rs b/sync/src/tests/helpers.rs
index b1c04f84e..10c1277a6 100644
--- a/sync/src/tests/helpers.rs
+++ b/sync/src/tests/helpers.rs
@@ -158,19 +158,19 @@ impl TestNet {
 	}
 
 	pub fn peer(&self, i: usize) -> &TestPeer {
-		self.peers.get(i).unwrap()
+		&self.peers[i]
 	}
 
 	pub fn peer_mut(&mut self, i: usize) -> &mut TestPeer {
-		self.peers.get_mut(i).unwrap()
+		&mut self.peers[i]
 	}
 
 	pub fn start(&mut self) {
 		for peer in 0..self.peers.len() {
 			for client in 0..self.peers.len() {
 				if peer != client {
-					let mut p = self.peers.get_mut(peer).unwrap();
-					p.sync.write().update_targets(&mut p.chain);
+					let mut p = &mut self.peers[peer];
+					p.sync.write().update_targets(&p.chain);
 					p.sync.write().on_peer_connected(&mut TestIo::new(&mut p.chain, &p.snapshot_service, &mut p.queue, Some(client as PeerId)), client as PeerId);
 				}
 			}
@@ -181,7 +181,7 @@ impl TestNet {
 		for peer in 0..self.peers.len() {
 			if let Some(packet) = self.peers[peer].queue.pop_front() {
 				let disconnecting = {
-					let mut p = self.peers.get_mut(packet.recipient).unwrap();
+					let mut p = &mut self.peers[packet.recipient];
 					trace!("--- {} -> {} ---", peer, packet.recipient);
 					let to_disconnect = {
 						let mut io = TestIo::new(&mut p.chain, &p.snapshot_service, &mut p.queue, Some(peer as PeerId));
@@ -198,7 +198,7 @@ impl TestNet {
 				};
 				for d in &disconnecting {
 					// notify other peers that this peer is disconnecting
-					let mut p = self.peers.get_mut(*d).unwrap();
+					let mut p = &mut self.peers[*d];
 					let mut io = TestIo::new(&mut p.chain, &p.snapshot_service, &mut p.queue, Some(peer as PeerId));
 					p.sync.write().on_peer_aborting(&mut io, peer as PeerId);
 				}
diff --git a/test.sh b/test.sh
index 44bffa7d9..3e9074478 100755
--- a/test.sh
+++ b/test.sh
@@ -19,5 +19,5 @@ case $1 in
 esac
 
 . ./scripts/targets.sh
-cargo test $OPTIONS --features "$FEATURES" $TARGETS $1 \
+cargo test -j 8 $OPTIONS --features "$FEATURES" $TARGETS $1 \
 
diff --git a/util/Cargo.toml b/util/Cargo.toml
index cc342eeca..1a439ebf8 100644
--- a/util/Cargo.toml
+++ b/util/Cargo.toml
@@ -23,7 +23,7 @@ rlp = { path = "rlp" }
 heapsize = { version = "0.3", features = ["unstable"] }
 itertools = "0.4"
 sha3 = { path = "sha3" }
-clippy = { version = "0.0.96", optional = true}
+clippy = { version = "0.0.103", optional = true}
 ethcore-devtools = { path = "../devtools" }
 libc = "0.2.7"
 vergen = "0.1"
diff --git a/util/network/Cargo.toml b/util/network/Cargo.toml
index fe1938305..37ff825b0 100644
--- a/util/network/Cargo.toml
+++ b/util/network/Cargo.toml
@@ -15,7 +15,7 @@ time = "0.1.34"
 tiny-keccak = "1.0"
 rust-crypto = "0.2.34"
 slab = "0.2"
-clippy = { version = "0.0.96", optional = true}
+clippy = { version = "0.0.103", optional = true}
 igd = "0.5.0"
 libc = "0.2.7"
 parking_lot = "0.3"
diff --git a/util/network/src/connection.rs b/util/network/src/connection.rs
index 05976b5e6..ea0763b09 100644
--- a/util/network/src/connection.rs
+++ b/util/network/src/connection.rs
@@ -507,7 +507,7 @@ mod tests {
 	use std::io::{Read, Write, Error, Cursor, ErrorKind};
 	use mio::{Ready};
 	use std::collections::VecDeque;
-	use util::bytes::*;
+	use util::bytes::Bytes;
 	use devtools::*;
 	use io::*;
 
diff --git a/util/network/src/discovery.rs b/util/network/src/discovery.rs
index 18bd858eb..996578af5 100644
--- a/util/network/src/discovery.rs
+++ b/util/network/src/discovery.rs
@@ -555,10 +555,11 @@ impl Discovery {
 #[cfg(test)]
 mod tests {
 	use super::*;
-	use util::hash::*;
-	use util::sha3::*;
-	use std::net::*;
-	use node_table::*;
+	use std::net::{SocketAddr};
+	use util::sha3::Hashable;
+	use util::FixedHash;
+	use node_table::{Node, NodeId, NodeEndpoint};
+
 	use std::str::FromStr;
 	use rustc_serialize::hex::FromHex;
 	use ethkey::{Random, Generator};
diff --git a/util/network/src/handshake.rs b/util/network/src/handshake.rs
index d7950b383..0eeda3b54 100644
--- a/util/network/src/handshake.rs
+++ b/util/network/src/handshake.rs
@@ -333,7 +333,7 @@ mod test {
 	use std::sync::Arc;
 	use rustc_serialize::hex::FromHex;
 	use super::*;
-	use util::hash::*;
+	use util::hash::{H256, FixedHash};
 	use io::*;
 	use mio::tcp::TcpStream;
 	use stats::NetworkStats;
diff --git a/util/network/src/node_table.rs b/util/network/src/node_table.rs
index be70bd9a1..ab7d17fa9 100644
--- a/util/network/src/node_table.rs
+++ b/util/network/src/node_table.rs
@@ -357,9 +357,9 @@ pub fn is_valid_node_url(url: &str) -> bool {
 #[cfg(test)]
 mod tests {
 	use super::*;
+	use std::net::{SocketAddr, SocketAddrV4, Ipv4Addr};
+	use util::H512;
 	use std::str::FromStr;
-	use std::net::*;
-	use util::hash::*;
 	use devtools::*;
 	use AllowIP;
 
diff --git a/util/src/common.rs b/util/src/common.rs
index ea2a0f5ea..681b0baef 100644
--- a/util/src/common.rs
+++ b/util/src/common.rs
@@ -33,6 +33,13 @@ macro_rules! vec_into {
 	}
 }
 
+#[macro_export]
+macro_rules! slice_into {
+	( $( $x:expr ),* ) => {
+		&[ $( $x.into() ),* ]
+	}
+}
+
 #[macro_export]
 macro_rules! hash_map {
 	() => { HashMap::new() };
diff --git a/util/src/hashdb.rs b/util/src/hashdb.rs
index 671b32ed5..092d40d8a 100644
--- a/util/src/hashdb.rs
+++ b/util/src/hashdb.rs
@@ -107,21 +107,6 @@ pub trait HashDB: AsHashDB + Send + Sync {
 	/// }
 	/// ```
 	fn remove(&mut self, key: &H256);
-
-	/// Insert auxiliary data into hashdb.
-	fn insert_aux(&mut self, _hash: Vec<u8>, _value: Vec<u8>) {
-		unimplemented!();
-	}
-
-	/// Get auxiliary data from hashdb.
-	fn get_aux(&self, _hash: &[u8]) -> Option<DBValue> {
-		unimplemented!();
-	}
-
-	/// Removes auxiliary data from hashdb.
-	fn remove_aux(&mut self, _hash: &[u8]) {
-		unimplemented!();
-	}
 }
 
 /// Upcast trait.
diff --git a/util/src/journaldb/archivedb.rs b/util/src/journaldb/archivedb.rs
index a8800045b..fb087d7b2 100644
--- a/util/src/journaldb/archivedb.rs
+++ b/util/src/journaldb/archivedb.rs
@@ -26,10 +26,6 @@ use kvdb::{Database, DBTransaction};
 #[cfg(test)]
 use std::env;
 
-/// Suffix appended to auxiliary keys to distinguish them from normal keys.
-/// Would be nich to use rocksdb columns for this eventually.
-const AUX_FLAG: u8 = 255;
-
 /// Implementation of the `HashDB` trait for a disk-backed database with a memory overlay
 /// and latent-removal semantics.
 ///
@@ -108,26 +104,6 @@ impl HashDB for ArchiveDB {
 	fn remove(&mut self, key: &H256) {
 		self.overlay.remove(key);
 	}
-
-	fn insert_aux(&mut self, hash: Vec<u8>, value: Vec<u8>) {
-		self.overlay.insert_aux(hash, value);
-	}
-
-	fn get_aux(&self, hash: &[u8]) -> Option<DBValue> {
-		if let Some(res) = self.overlay.get_aux(hash) {
-			return Some(res)
-		}
-
-		let mut db_hash = hash.to_vec();
-		db_hash.push(AUX_FLAG);
-
-		self.backing.get(self.column, &db_hash)
-			.expect("Low-level database error. Some issue with your hard disk?")
-	}
-
-	fn remove_aux(&mut self, hash: &[u8]) {
-		self.overlay.remove_aux(hash);
-	}
 }
 
 impl JournalDB for ArchiveDB {
@@ -164,11 +140,6 @@ impl JournalDB for ArchiveDB {
 			}
 		}
 
-		for (mut key, value) in self.overlay.drain_aux() {
-			key.push(AUX_FLAG);
-			batch.put(self.column, &key, &value);
-		}
-
 		if self.latest_era.map_or(true, |e| now > e) {
 			batch.put(self.column, &LATEST_ERA_KEY, &encode(&now));
 			self.latest_era = Some(now);
@@ -204,11 +175,6 @@ impl JournalDB for ArchiveDB {
 			}
 		}
 
-		for (mut key, value) in self.overlay.drain_aux() {
-			key.push(AUX_FLAG);
-			batch.put(self.column, &key, &value);
-		}
-
 		Ok((inserts + deletes) as u32)
 	}
 
@@ -235,8 +201,8 @@ mod tests {
 	#![cfg_attr(feature="dev", allow(similar_names))]
 
 	use common::*;
+	use hashdb::{HashDB, DBValue};
 	use super::*;
-	use hashdb::*;
 	use journaldb::traits::JournalDB;
 	use kvdb::Database;
 
diff --git a/util/src/journaldb/earlymergedb.rs b/util/src/journaldb/earlymergedb.rs
index d17c0ef1e..60263a2cd 100644
--- a/util/src/journaldb/earlymergedb.rs
+++ b/util/src/journaldb/earlymergedb.rs
@@ -554,9 +554,9 @@ mod tests {
 	#![cfg_attr(feature="dev", allow(similar_names))]
 
 	use common::*;
+	use hashdb::{HashDB, DBValue};
 	use super::*;
 	use super::super::traits::JournalDB;
-	use hashdb::*;
 	use log::init_log;
 	use kvdb::{Database, DatabaseConfig};
 
diff --git a/util/src/journaldb/overlayrecentdb.rs b/util/src/journaldb/overlayrecentdb.rs
index 42fe84557..34f942a0b 100644
--- a/util/src/journaldb/overlayrecentdb.rs
+++ b/util/src/journaldb/overlayrecentdb.rs
@@ -422,7 +422,7 @@ mod tests {
 
 	use common::*;
 	use super::*;
-	use hashdb::*;
+	use hashdb::{HashDB, DBValue};
 	use log::init_log;
 	use journaldb::JournalDB;
 	use kvdb::Database;
diff --git a/util/src/journaldb/refcounteddb.rs b/util/src/journaldb/refcounteddb.rs
index d63f8837d..82261965c 100644
--- a/util/src/journaldb/refcounteddb.rs
+++ b/util/src/journaldb/refcounteddb.rs
@@ -215,9 +215,9 @@ mod tests {
 	#![cfg_attr(feature="dev", allow(similar_names))]
 
 	use common::*;
+	use hashdb::{HashDB, DBValue};
 	use super::*;
 	use super::super::traits::JournalDB;
-	use hashdb::*;
 
 	#[test]
 	fn long_history() {
diff --git a/util/src/kvdb.rs b/util/src/kvdb.rs
index 8be22e0aa..de3b033ec 100644
--- a/util/src/kvdb.rs
+++ b/util/src/kvdb.rs
@@ -628,7 +628,7 @@ impl Drop for Database {
 
 #[cfg(test)]
 mod tests {
-	use hash::*;
+	use hash::H256;
 	use super::*;
 	use devtools::*;
 	use std::str::FromStr;
diff --git a/util/src/memorydb.rs b/util/src/memorydb.rs
index 338f12b1e..20dd3a41f 100644
--- a/util/src/memorydb.rs
+++ b/util/src/memorydb.rs
@@ -17,7 +17,6 @@
 //! Reference-counted memory-based `HashDB` implementation.
 
 use hash::*;
-use bytes::*;
 use rlp::*;
 use sha3::*;
 use hashdb::*;
@@ -72,7 +71,6 @@ use std::collections::hash_map::Entry;
 #[derive(Default, Clone, PartialEq)]
 pub struct MemoryDB {
 	data: H256FastMap<(DBValue, i32)>,
-	aux: HashMap<Bytes, DBValue>,
 }
 
 impl MemoryDB {
@@ -80,7 +78,6 @@ impl MemoryDB {
 	pub fn new() -> MemoryDB {
 		MemoryDB {
 			data: H256FastMap::default(),
-			aux: HashMap::new(),
 		}
 	}
 
@@ -118,11 +115,6 @@ impl MemoryDB {
 		mem::replace(&mut self.data, H256FastMap::default())
 	}
 
-	/// Return the internal map of auxiliary data, clearing the current state.
-	pub fn drain_aux(&mut self) -> HashMap<Bytes, DBValue> {
-		mem::replace(&mut self.aux, HashMap::new())
-	}
-
 	/// Grab the raw information associated with a key. Returns None if the key
 	/// doesn't exist.
 	///
@@ -138,7 +130,6 @@ impl MemoryDB {
 	/// Returns the size of allocated heap memory
 	pub fn mem_used(&self) -> usize {
 		self.data.heap_size_of_children()
-		+ self.aux.heap_size_of_children()
 	}
 
 	/// Remove an element and delete it from storage if reference count reaches zero.
@@ -256,18 +247,6 @@ impl HashDB for MemoryDB {
 			self.data.insert(key.clone(), (DBValue::new(), -1));
 		}
 	}
-
-	fn insert_aux(&mut self, hash: Vec<u8>, value: Vec<u8>) {
-		self.aux.insert(hash, DBValue::from_vec(value));
-	}
-
-	fn get_aux(&self, hash: &[u8]) -> Option<DBValue> {
-		self.aux.get(hash).cloned()
-	}
-
-	fn remove_aux(&mut self, hash: &[u8]) {
-		self.aux.remove(hash);
-	}
 }
 
 #[test]
diff --git a/util/src/stats.rs b/util/src/stats.rs
index a106ba29c..2a950ff4f 100644
--- a/util/src/stats.rs
+++ b/util/src/stats.rs
@@ -67,7 +67,7 @@ mod tests {
 
 	#[test]
 	fn check_histogram() {
-		let hist = Histogram::new(&vec_into![643,689,1408,2000,2296,2512,4250,4320,4842,4958,5804,6065,6098,6354,7002,7145,7845,8589,8593,8895], 5).unwrap();
+		let hist = Histogram::new(slice_into![643,689,1408,2000,2296,2512,4250,4320,4842,4958,5804,6065,6098,6354,7002,7145,7845,8589,8593,8895], 5).unwrap();
 		let correct_bounds: Vec<U256> = vec_into![643, 2294, 3945, 5596, 7247, 8898];
 		assert_eq!(Histogram { bucket_bounds: correct_bounds, counts: vec![4,2,4,6,4] }, hist);
 	}
@@ -75,7 +75,7 @@ mod tests {
 	#[test]
 	fn smaller_data_range_than_bucket_range() {
 		assert_eq!(
-			Histogram::new(&vec_into![1, 2, 2], 3),
+			Histogram::new(slice_into![1, 2, 2], 3),
 			Some(Histogram { bucket_bounds: vec_into![1, 2, 3, 4], counts: vec![1, 2, 0] })
 		);
 	}
@@ -83,7 +83,7 @@ mod tests {
 	#[test]
 	fn data_range_is_not_multiple_of_bucket_range() {
 		assert_eq!(
-			Histogram::new(&vec_into![1, 2, 5], 2),
+			Histogram::new(slice_into![1, 2, 5], 2),
 			Some(Histogram { bucket_bounds: vec_into![1, 4, 7], counts: vec![2, 1] })
 		);
 	}
@@ -91,13 +91,13 @@ mod tests {
 	#[test]
 	fn data_range_is_multiple_of_bucket_range() {
 		assert_eq!(
-			Histogram::new(&vec_into![1, 2, 6], 2),
+			Histogram::new(slice_into![1, 2, 6], 2),
 			Some(Histogram { bucket_bounds: vec_into![1, 4, 7], counts: vec![2, 1] })
 		);
 	}
 
 	#[test]
 	fn none_when_too_few_data() {
-		assert!(Histogram::new(&vec_into![], 1).is_none());
+		assert!(Histogram::new(slice_into![], 1).is_none());
 	}
 }
diff --git a/util/src/trie/fatdb.rs b/util/src/trie/fatdb.rs
index 700156429..ca3f4ca79 100644
--- a/util/src/trie/fatdb.rs
+++ b/util/src/trie/fatdb.rs
@@ -17,7 +17,7 @@
 use hash::H256;
 use sha3::Hashable;
 use hashdb::{HashDB, DBValue};
-use super::{TrieDB, Trie, TrieDBIterator, TrieItem, Recorder};
+use super::{TrieDB, Trie, TrieDBIterator, TrieItem, Recorder, TrieIterator};
 
 /// A `Trie` implementation which hashes keys and uses a generic `HashDB` backing database.
 /// Additionaly it stores inserted hash-key mappings for later retrieval.
@@ -46,7 +46,7 @@ impl<'db> FatDB<'db> {
 }
 
 impl<'db> Trie for FatDB<'db> {
-	fn iter<'a>(&'a self) -> super::Result<Box<Iterator<Item = TrieItem> + 'a>> {
+	fn iter<'a>(&'a self) -> super::Result<Box<TrieIterator<Item = TrieItem> + 'a>> {
 		FatDBIterator::new(&self.raw).map(|iter| Box::new(iter) as Box<_>)
 	}
 
@@ -81,6 +81,12 @@ impl<'db> FatDBIterator<'db> {
 	}
 }
 
+impl<'db> TrieIterator for FatDBIterator<'db> {
+	fn seek(&mut self, key: &[u8]) -> super::Result<()> {
+		self.trie_iterator.seek(&key.sha3())
+	}
+}
+
 impl<'db> Iterator for FatDBIterator<'db> {
 	type Item = TrieItem<'db>;
 
@@ -88,7 +94,8 @@ impl<'db> Iterator for FatDBIterator<'db> {
 		self.trie_iterator.next()
 			.map(|res|
 				res.map(|(hash, value)| {
-					(self.trie.db().get_aux(&hash).expect("Missing fatdb hash").to_vec(), value)
+					let aux_hash = hash.sha3();
+					(self.trie.db().get(&aux_hash).expect("Missing fatdb hash").to_vec(), value)
 				})
 			)
 	}
diff --git a/util/src/trie/fatdbmut.rs b/util/src/trie/fatdbmut.rs
index fa1c168e8..c81c62f71 100644
--- a/util/src/trie/fatdbmut.rs
+++ b/util/src/trie/fatdbmut.rs
@@ -51,6 +51,10 @@ impl<'db> FatDBMut<'db> {
 	pub fn db_mut(&mut self) -> &mut HashDB {
 		self.raw.db_mut()
 	}
+
+	fn to_aux_key(key: &[u8]) -> H256 {
+		key.sha3()
+	}
 }
 
 impl<'db> TrieMut for FatDBMut<'db> {
@@ -76,12 +80,14 @@ impl<'db> TrieMut for FatDBMut<'db> {
 		let hash = key.sha3();
 		try!(self.raw.insert(&hash, value));
 		let db = self.raw.db_mut();
-		db.insert_aux(hash.to_vec(), key.to_vec());
+		db.emplace(Self::to_aux_key(&hash), DBValue::from_slice(key));
 		Ok(())
 	}
 
 	fn remove(&mut self, key: &[u8]) -> super::Result<()> {
-		self.raw.remove(&key.sha3())
+		let hash = key.sha3();
+		self.raw.db_mut().remove(&Self::to_aux_key(&hash));
+		self.raw.remove(&hash)
 	}
 }
 
diff --git a/util/src/trie/mod.rs b/util/src/trie/mod.rs
index d4cc04962..9c4284b89 100644
--- a/util/src/trie/mod.rs
+++ b/util/src/trie/mod.rs
@@ -102,7 +102,7 @@ pub trait Trie {
 		where 'a: 'b, R: Recorder;
 
 	/// Returns an iterator over elements of trie.
-	fn iter<'a>(&'a self) -> Result<Box<Iterator<Item = TrieItem> + 'a>>;
+	fn iter<'a>(&'a self) -> Result<Box<TrieIterator<Item = TrieItem> + 'a>>;
 }
 
 /// A key-value datastore implemented as a database-backed modified Merkle tree.
@@ -130,6 +130,12 @@ pub trait TrieMut {
 	fn remove(&mut self, key: &[u8]) -> Result<()>;
 }
 
+/// A trie iterator that also supports random access.
+pub trait TrieIterator : Iterator {
+	/// Position the iterator on the first element with key > `key`
+	fn seek(&mut self, key: &[u8]) -> Result<()>;
+}
+
 /// Trie types
 #[derive(Debug, PartialEq, Clone)]
 pub enum TrieSpec {
@@ -193,7 +199,7 @@ impl<'db> Trie for TrieKinds<'db> {
 		wrapper!(self, get_recorded, key, r)
 	}
 
-	fn iter<'a>(&'a self) -> Result<Box<Iterator<Item = TrieItem> + 'a>> {
+	fn iter<'a>(&'a self) -> Result<Box<TrieIterator<Item = TrieItem> + 'a>> {
 		wrapper!(self, iter,)
 	}
 }
diff --git a/util/src/trie/sectriedb.rs b/util/src/trie/sectriedb.rs
index b1d7bbc0c..0861f53f3 100644
--- a/util/src/trie/sectriedb.rs
+++ b/util/src/trie/sectriedb.rs
@@ -18,7 +18,7 @@ use hash::H256;
 use sha3::Hashable;
 use hashdb::{HashDB, DBValue};
 use super::triedb::TrieDB;
-use super::{Trie, TrieItem, Recorder};
+use super::{Trie, TrieItem, Recorder, TrieIterator};
 
 /// A `Trie` implementation which hashes keys and uses a generic `HashDB` backing database.
 ///
@@ -49,7 +49,7 @@ impl<'db> SecTrieDB<'db> {
 }
 
 impl<'db> Trie for SecTrieDB<'db> {
-	fn iter<'a>(&'a self) -> super::Result<Box<Iterator<Item = TrieItem> + 'a>> {
+	fn iter<'a>(&'a self) -> super::Result<Box<TrieIterator<Item = TrieItem> + 'a>> {
 		TrieDB::iter(&self.raw)
 	}
 
diff --git a/util/src/trie/triedb.rs b/util/src/trie/triedb.rs
index d929c9d68..ecd8bdded 100644
--- a/util/src/trie/triedb.rs
+++ b/util/src/trie/triedb.rs
@@ -20,7 +20,7 @@ use nibbleslice::*;
 use rlp::*;
 use super::node::Node;
 use super::recorder::{Recorder, NoOp};
-use super::{Trie, TrieItem, TrieError};
+use super::{Trie, TrieItem, TrieError, TrieIterator};
 
 /// A `Trie` implementation using a generic `HashDB` backing database.
 ///
@@ -295,6 +295,64 @@ impl<'a> TrieDBIterator<'a> {
 		Ok(r)
 	}
 
+	fn seek_descend<'key> ( &mut self, node: &[u8], key: &NibbleSlice<'key>, d: u32) -> super::Result<()> {
+		match Node::decoded(node) {
+			Node::Leaf(ref slice, _) => {
+				let slice = &NibbleSlice::from_encoded(slice).0;
+				if slice == key {
+					self.trail.push(Crumb {
+						status: Status::At,
+						node: Node::decoded(node),
+					});
+				} else {
+					self.trail.push(Crumb {
+						status: Status::Exiting,
+						node: Node::decoded(node),
+					});
+				}
+				self.key_nibbles.extend(slice.iter());
+				Ok(())
+			},
+			Node::Extension(ref slice, ref item) => {
+				let slice = &NibbleSlice::from_encoded(slice).0;
+				if key.starts_with(slice) {
+					let mut r = NoOp;
+					self.trail.push(Crumb {
+						status: Status::At,
+						node: Node::decoded(node),
+					});
+					self.key_nibbles.extend(slice.iter());
+					let data = try!(self.db.get_raw_or_lookup(&*item, &mut r, d));
+					self.seek_descend(&data, &key.mid(slice.len()), d + 1)
+				} else {
+					try!(self.descend(node));
+					Ok(())
+				}
+			},
+			Node::Branch(ref nodes, _) => match key.is_empty() {
+				true => {
+					self.trail.push(Crumb {
+						status: Status::At,
+						node: Node::decoded(node),
+					});
+					Ok(())
+				},
+				false => {
+					let mut r = NoOp;
+					let i = key.at(0);
+					self.trail.push(Crumb {
+						status: Status::AtChild(i as usize),
+						node: Node::decoded(node),
+					});
+					self.key_nibbles.push(i);
+					let child = try!(self.db.get_raw_or_lookup(&*nodes[i as usize], &mut r, d));
+					self.seek_descend(&child, &key.mid(1), d + 1)
+				}
+			},
+			_ => Ok(())
+		}
+	}
+
 	/// Descend into a payload.
 	fn descend(&mut self, d: &[u8]) -> super::Result<()> {
 		self.trail.push(Crumb {
@@ -316,6 +374,17 @@ impl<'a> TrieDBIterator<'a> {
 	}
 }
 
+impl<'a> TrieIterator for TrieDBIterator<'a> {
+	/// Position the iterator on the first element with key >= `key`
+	fn seek(&mut self, key: &[u8]) -> super::Result<()> {
+		self.trail.clear();
+		self.key_nibbles.clear();
+		let mut r = NoOp;
+		let root_rlp = try!(self.db.root_data(&mut r));
+		self.seek_descend(&root_rlp, &NibbleSlice::new(key), 1)
+	}
+}
+
 impl<'a> Iterator for TrieDBIterator<'a> {
 	type Item = TrieItem<'a>;
 
@@ -372,7 +441,7 @@ impl<'a> Iterator for TrieDBIterator<'a> {
 }
 
 impl<'db> Trie for TrieDB<'db> {
-	fn iter<'a>(&'a self) -> super::Result<Box<Iterator<Item = TrieItem> + 'a>> {
+	fn iter<'a>(&'a self) -> super::Result<Box<TrieIterator<Item = TrieItem> + 'a>> {
 		TrieDBIterator::new(self).map(|iter| Box::new(iter) as Box<_>)
 	}
 
@@ -415,3 +484,48 @@ fn iterator() {
 	assert_eq!(d.iter().map(|i| i.clone().to_vec()).collect::<Vec<_>>(), t.iter().unwrap().map(|x| x.unwrap().0).collect::<Vec<_>>());
 	assert_eq!(d, t.iter().unwrap().map(|x| x.unwrap().1).collect::<Vec<_>>());
 }
+
+#[test]
+fn iterator_seek() {
+	use memorydb::*;
+	use super::TrieMut;
+	use super::triedbmut::*;
+
+	let d = vec![ DBValue::from_slice(b"A"), DBValue::from_slice(b"AA"), DBValue::from_slice(b"AB"), DBValue::from_slice(b"B") ];
+
+	let mut memdb = MemoryDB::new();
+	let mut root = H256::new();
+	{
+		let mut t = TrieDBMut::new(&mut memdb, &mut root);
+		for x in &d {
+			t.insert(x, x).unwrap();
+		}
+	}
+
+	let t = TrieDB::new(&memdb, &root).unwrap();
+	let mut iter = t.iter().unwrap();
+	assert_eq!(iter.next(), Some(Ok((b"A".to_vec(), DBValue::from_slice(b"A")))));
+	iter.seek(b"!").unwrap();
+	assert_eq!(d, iter.map(|x| x.unwrap().1).collect::<Vec<_>>());
+	let mut iter = t.iter().unwrap();
+	iter.seek(b"A").unwrap();
+	assert_eq!(&d[1..], &iter.map(|x| x.unwrap().1).collect::<Vec<_>>()[..]);
+	let mut iter = t.iter().unwrap();
+	iter.seek(b"AA").unwrap();
+	assert_eq!(&d[2..], &iter.map(|x| x.unwrap().1).collect::<Vec<_>>()[..]);
+	let mut iter = t.iter().unwrap();
+	iter.seek(b"A!").unwrap();
+	assert_eq!(&d[1..], &iter.map(|x| x.unwrap().1).collect::<Vec<_>>()[..]);
+	let mut iter = t.iter().unwrap();
+	iter.seek(b"AB").unwrap();
+	assert_eq!(&d[3..], &iter.map(|x| x.unwrap().1).collect::<Vec<_>>()[..]);
+	let mut iter = t.iter().unwrap();
+	iter.seek(b"AB!").unwrap();
+	assert_eq!(&d[3..], &iter.map(|x| x.unwrap().1).collect::<Vec<_>>()[..]);
+	let mut iter = t.iter().unwrap();
+	iter.seek(b"B").unwrap();
+	assert_eq!(&d[4..], &iter.map(|x| x.unwrap().1).collect::<Vec<_>>()[..]);
+	let mut iter = t.iter().unwrap();
+	iter.seek(b"C").unwrap();
+	assert_eq!(&d[4..], &iter.map(|x| x.unwrap().1).collect::<Vec<_>>()[..]);
+}