diff --git a/Cargo.lock b/Cargo.lock
index e76a6749b..511218335 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,6 +3,7 @@ name = "parity"
 version = "1.5.0"
 dependencies = [
  "ansi_term 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "app_dirs 1.1.1 (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)",
@@ -42,7 +43,7 @@ dependencies = [
  "serde_json 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -58,6 +59,17 @@ name = "ansi_term"
 version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "app_dirs"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ole32-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "shell32-sys 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "xdg 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "arrayvec"
 version = "0.3.16"
@@ -196,7 +208,7 @@ source = "git+https://github.com/ethcore/rust-ctrlc.git#f4927770f89eca80ec250911
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -277,7 +289,7 @@ name = "ethash"
 version = "1.5.0"
 dependencies = [
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "primal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha3 0.1.0",
 ]
@@ -395,7 +407,7 @@ dependencies = [
  "crossbeam 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio 0.6.1 (git+https://github.com/ethcore/mio)",
- "parking_lot 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -500,7 +512,7 @@ dependencies = [
  "libc 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio 0.6.1 (git+https://github.com/ethcore/mio)",
- "parking_lot 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rlp 0.1.0",
  "rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -597,7 +609,7 @@ dependencies = [
  "libc 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "lru-cache 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.1.68 (registry+https://github.com/rust-lang/crates.io-index)",
  "rlp 0.1.0",
@@ -659,7 +671,7 @@ dependencies = [
  "itertools 0.4.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -688,7 +700,7 @@ dependencies = [
  "ethkey 0.2.0",
  "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rlp 0.1.0",
  "semver 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -845,7 +857,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -864,7 +876,7 @@ version = "4.0.0"
 source = "git+https://github.com/ethcore/jsonrpc.git#33262d626a294a00c20435dec331058ba65e224a"
 dependencies = [
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.8.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_codegen 0.8.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -925,7 +937,7 @@ name = "kernel32-sys"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1026,7 +1038,7 @@ dependencies = [
  "nix 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1042,7 +1054,7 @@ dependencies = [
  "nix 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1057,7 +1069,7 @@ dependencies = [
  "net2 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "nix 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.2.0 (git+https://github.com/carllerche/slab?rev=5476efcafb)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1073,7 +1085,7 @@ dependencies = [
  "net2 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "nix 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1083,7 +1095,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "net2 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1094,7 +1106,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1123,7 +1135,7 @@ dependencies = [
  "cfg-if 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1262,6 +1274,15 @@ name = "odds"
 version = "0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "ole32-sys"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "owning_ref"
 version = "0.2.2"
@@ -1300,14 +1321,14 @@ dependencies = [
 [[package]]
 name = "parity-ui-precompiled"
 version = "1.4.0"
-source = "git+https://github.com/ethcore/js-precompiled.git#175003ae159b126302fd1a90dd875dc86d7adba0"
+source = "git+https://github.com/ethcore/js-precompiled.git#762c6d10f8640a6c4b875d776490282680bfe3e2"
 dependencies = [
  "parity-dapps-glue 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "parking_lot"
-version = "0.3.5"
+version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "owning_ref 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1323,7 +1344,7 @@ dependencies = [
  "libc 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1546,7 +1567,7 @@ dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "termios 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1650,6 +1671,15 @@ dependencies = [
  "gcc 0.3.35 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "shell32-sys"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "siphasher"
 version = "0.1.1"
@@ -1785,7 +1815,7 @@ version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1794,7 +1824,7 @@ version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1829,7 +1859,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1925,7 +1955,7 @@ name = "vecio"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1956,7 +1986,7 @@ dependencies = [
 
 [[package]]
 name = "winapi"
-version = "0.2.6"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1984,10 +2014,15 @@ name = "ws2_32-sys"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "xdg"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "xml-rs"
 version = "0.3.4"
@@ -2018,6 +2053,7 @@ dependencies = [
 [metadata]
 "checksum aho-corasick 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "67077478f0a03952bed2e6786338d400d40c25e9836e08ad50af96607317fd03"
 "checksum ansi_term 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1f46cd5b1d660c938e3f92dfe7a73d832b3281479363dd0cd9c1c2fbf60f7962"
+"checksum app_dirs 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b7d1c0d48a81bbb13043847f957971f4d87c81542d80ece5e84ba3cba4058fd4"
 "checksum arrayvec 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)" = "16e3bdb2f54b3ace0285975d59a97cf8ed3855294b2b6bc651fcf22a9c352975"
 "checksum aster 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)" = "07d344974f0a155f091948aa389fb1b912d3a58414fbdb9c8d446d193ee3496a"
 "checksum aster 0.25.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4df293303e8a52e1df7984ac1415e195f5fcbf51e4bb7bda54557861a3954a08"
@@ -2104,10 +2140,11 @@ dependencies = [
 "checksum num_cpus 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "51fedae97a05f7353612fe017ab705a37e6db8f4d67c5c6fe739a9e70d6eed09"
 "checksum number_prefix 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "084d05f4bf60621a9ac9bde941a410df548f4de9545f06e5ee9d3aef4b97cd77"
 "checksum odds 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)" = "b28c06e81b0f789122d415d6394b5fe849bde8067469f4c2980d3cdc10c78ec1"
+"checksum ole32-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5d2c49021782e5233cd243168edfa8037574afed4eba4bbaf538b3d8d1789d8c"
 "checksum owning_ref 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "8d91377085359426407a287ab16884a0111ba473aa6844ff01d4ec20ce3d75e7"
 "checksum parity-dapps-glue 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "98378dec0a185da2b7180308752f0bad73aaa949c3e0a3b0528d0e067945f7ab"
 "checksum parity-ui-precompiled 1.4.0 (git+https://github.com/ethcore/js-precompiled.git)" = "<none>"
-"checksum parking_lot 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "dbc5847584161f273e69edc63c1a86254a22f570a0b5dd87aa6f9773f6f7d125"
+"checksum parking_lot 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "e1435e7a2a00dfebededd6c6bdbd54008001e94b4a2aadd6aef0dc4c56317621"
 "checksum parking_lot_core 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fb1b97670a2ffadce7c397fb80a3d687c4f3060140b885621ef1653d0e5d5068"
 "checksum phf 0.7.14 (registry+https://github.com/rust-lang/crates.io-index)" = "447d9d45f2e0b4a9b532e808365abf18fc211be6ca217202fcd45236ef12f026"
 "checksum phf_codegen 0.7.14 (registry+https://github.com/rust-lang/crates.io-index)" = "8af7ae7c3f75a502292b491e5cc0a1f69e3407744abe6e57e2a3b712bb82f01d"
@@ -2145,6 +2182,7 @@ dependencies = [
 "checksum serde_codegen_internals 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f877e2781ed0a323295d1c9f0e26556117b5a11489fc47b1848dfb98b3173d21"
 "checksum serde_json 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0e10f8a9d94b06cf5d3bef66475f04c8ff90950f1be7004c357ff9472ccbaebc"
 "checksum sha1 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "cc30b1e1e8c40c121ca33b86c23308a090d19974ef001b4bf6e61fd1a0fb095c"
+"checksum shell32-sys 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "72f20b8f3c060374edb8046591ba28f62448c369ccbdc7b02075103fb3a9e38d"
 "checksum siphasher 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5c44e42fa187b5a8782489cf7740cc27c3125806be2bf33563cf5e02e9533fcd"
 "checksum slab 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "d807fd58c4181bbabed77cb3b891ba9748241a552bcc5be698faaebefc54f46e"
 "checksum slab 0.2.0 (git+https://github.com/carllerche/slab?rev=5476efcafb)" = "<none>"
@@ -2185,10 +2223,11 @@ dependencies = [
 "checksum vergen 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "56b639f935488eb40f06d17c3e3bcc3054f6f75d264e187b1107c8d1cba8d31c"
 "checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 "checksum webpki 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "813503a5985585e0812d430cd1328ee322f47f66629c8ed4ecab939cf9e92f91"
-"checksum winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "4dfaaa8fbdaa618fa6914b59b2769d690dd7521920a18d84b42d254678dd5fd4"
+"checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
 "checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
 "checksum ws 0.5.3 (git+https://github.com/ethcore/ws-rs.git?branch=mio-upstream-stable)" = "<none>"
 "checksum ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
+"checksum xdg 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "77b831a5ba77110f438f0ac5583aafeb087f70432998ba6b7dcb1d32185db453"
 "checksum xml-rs 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "65e74b96bd3179209dc70a980da6df843dff09e46eee103a0376c0949257e3ef"
 "checksum xmltree 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "472a9d37c7c53ab2391161df5b89b1f3bf76dab6ab150d7941ecbdd832282082"
 "checksum zip 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)" = "3ceb33a75b3d0608942302eed325b59d2c3ed777cc6c01627ae14e5697c6a31c"
diff --git a/Cargo.toml b/Cargo.toml
index bce959f61..a02bb2323 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,6 +28,7 @@ isatty = "0.1"
 toml = "0.2"
 serde = "0.8.0"
 serde_json = "0.8.0"
+app_dirs = "1.1.1"
 hyper = { version = "0.9", default-features = false }
 ctrlc = { git = "https://github.com/ethcore/rust-ctrlc.git" }
 fdlimit = "0.1"
diff --git a/ethcore/res/ethereum/classic.json b/ethcore/res/ethereum/classic.json
index a08dde33b..223978ca4 100644
--- a/ethcore/res/ethereum/classic.json
+++ b/ethcore/res/ethereum/classic.json
@@ -1,6 +1,6 @@
 {
 	"name": "Ethereum Classic",
-	"forkName": "classic",
+	"dataDir": "classic",
 	"engine": {
 		"Ethash": {
 			"params": {
diff --git a/ethcore/res/ethereum/expanse.json b/ethcore/res/ethereum/expanse.json
index 8d580b6f5..d8cbd5b0c 100644
--- a/ethcore/res/ethereum/expanse.json
+++ b/ethcore/res/ethereum/expanse.json
@@ -1,6 +1,6 @@
 {
 	"name": "Expanse",
-	"forkName": "expanse",
+	"dataDir": "expanse",
 	"engine": {
 		"Ethash": {
 			"params": {
diff --git a/ethcore/res/ethereum/frontier.json b/ethcore/res/ethereum/frontier.json
index 3a9dce456..91a8ae9e6 100644
--- a/ethcore/res/ethereum/frontier.json
+++ b/ethcore/res/ethereum/frontier.json
@@ -1,5 +1,6 @@
 {
 	"name": "Frontier/Homestead",
+	"dataDir": "ethereum",
 	"engine": {
 		"Ethash": {
 			"params": {
diff --git a/ethcore/res/ethereum/morden.json b/ethcore/res/ethereum/morden.json
index d24e0ec0c..d21756250 100644
--- a/ethcore/res/ethereum/morden.json
+++ b/ethcore/res/ethereum/morden.json
@@ -1,5 +1,6 @@
 {
 	"name": "Morden",
+	"dataDir": "test",
 	"engine": {
 		"Ethash": {
 			"params": {
diff --git a/ethcore/res/ethereum/ropsten.json b/ethcore/res/ethereum/ropsten.json
index 62282801d..d388ce9a1 100644
--- a/ethcore/res/ethereum/ropsten.json
+++ b/ethcore/res/ethereum/ropsten.json
@@ -1,5 +1,6 @@
 {
 	"name": "Ropsten",
+	"dataDir": "test",
 	"engine": {
 		"Ethash": {
 			"params": {
diff --git a/ethcore/src/client/test_client.rs b/ethcore/src/client/test_client.rs
index 7d619ffba..81c948b00 100644
--- a/ethcore/src/client/test_client.rs
+++ b/ethcore/src/client/test_client.rs
@@ -90,6 +90,8 @@ pub struct TestBlockChainClient {
 	pub ancient_block: RwLock<Option<(H256, u64)>>,
 	/// First block info.
 	pub first_block: RwLock<Option<(H256, u64)>>,
+	/// Traces to return
+	pub traces: RwLock<Option<Vec<LocalizedTrace>>>,
 }
 
 /// Used for generating test client blocks.
@@ -151,6 +153,7 @@ impl TestBlockChainClient {
 			latest_block_timestamp: RwLock::new(10_000_000),
 			ancient_block: RwLock::new(None),
 			first_block: RwLock::new(None),
+			traces: RwLock::new(None),
 		};
 		client.add_blocks(1, EachBlockWith::Nothing); // add genesis block
 		client.genesis_hash = client.last_hash.read().clone();
@@ -654,19 +657,19 @@ impl BlockChainClient for TestBlockChainClient {
 	}
 
 	fn filter_traces(&self, _filter: TraceFilter) -> Option<Vec<LocalizedTrace>> {
-		unimplemented!();
+		self.traces.read().clone()
 	}
 
 	fn trace(&self, _trace: TraceId) -> Option<LocalizedTrace> {
-		unimplemented!();
+		self.traces.read().clone().and_then(|vec| vec.into_iter().next())
 	}
 
 	fn transaction_traces(&self, _trace: TransactionId) -> Option<Vec<LocalizedTrace>> {
-		unimplemented!();
+		self.traces.read().clone()
 	}
 
 	fn block_traces(&self, _trace: BlockId) -> Option<Vec<LocalizedTrace>> {
-		unimplemented!();
+		self.traces.read().clone()
 	}
 
 	fn queue_transactions(&self, transactions: Vec<Bytes>, _peer_id: usize) {
diff --git a/ethcore/src/engines/tendermint/mod.rs b/ethcore/src/engines/tendermint/mod.rs
index de89658ab..bb6d54ca5 100644
--- a/ethcore/src/engines/tendermint/mod.rs
+++ b/ethcore/src/engines/tendermint/mod.rs
@@ -661,10 +661,10 @@ mod tests {
 	use block::*;
 	use error::{Error, BlockError};
 	use header::Header;
+	use io::IoChannel;
 	use env_info::EnvInfo;
 	use tests::helpers::*;
 	use account_provider::AccountProvider;
-	use io::IoService;
 	use service::ClientIoMessage;
 	use spec::Spec;
 	use engines::{Engine, EngineError, Seal};
@@ -904,19 +904,15 @@ mod tests {
 		let proposal = Some(b.header().bare_hash());
 
 		// Register IoHandler remembers messages.
-		let io_service = IoService::<ClientIoMessage>::start().unwrap();
 		let test_io = TestIo::new();
-		io_service.register_handler(test_io.clone()).unwrap();
-		engine.register_message_channel(io_service.channel());
+		let channel = IoChannel::to_handler(Arc::downgrade(&(test_io.clone() as Arc<IoHandler<ClientIoMessage>>)));
+		engine.register_message_channel(channel);
 
 		let prevote_current = vote(&engine, |mh| tap.sign(v0, None, mh).map(H520::from), h, r, Step::Prevote, proposal);
 
 		let precommit_current = vote(&engine, |mh| tap.sign(v0, None, mh).map(H520::from), h, r, Step::Precommit, proposal);
 
 		let prevote_future = vote(&engine, |mh| tap.sign(v0, None, mh).map(H520::from), h + 1, r, Step::Prevote, proposal);
-		
-		// Wait a bit for async stuff.
-		::std::thread::sleep(::std::time::Duration::from_millis(500));
 
 		// Relays all valid present and future messages.
 		assert!(test_io.received.read().contains(&ClientIoMessage::BroadcastMessage(prevote_current)));
@@ -941,9 +937,8 @@ mod tests {
 
 		// Register IoHandler remembers messages.
 		let test_io = TestIo::new();
-		let io_service = IoService::<ClientIoMessage>::start().unwrap();
-		io_service.register_handler(test_io.clone()).unwrap();
-		engine.register_message_channel(io_service.channel());
+		let channel = IoChannel::to_handler(Arc::downgrade(&(test_io.clone() as Arc<IoHandler<ClientIoMessage>>)));
+		engine.register_message_channel(channel);
 
 		// Propose
 		let (b, mut seal) = propose_default(&spec, v1.clone());
@@ -956,11 +951,12 @@ mod tests {
 		vote(&engine, |mh| tap.sign(v1, None, mh).map(H520::from), h, r, Step::Precommit, proposal);
 		vote(&engine, |mh| tap.sign(v0, None, mh).map(H520::from), h, r, Step::Precommit, proposal);
 
-		// Wait a bit for async stuff.
-		::std::thread::sleep(::std::time::Duration::from_millis(500));
-
 		seal[2] = precommit_signatures(&tap, h, r, Some(b.header().bare_hash()), v1, v0);
-		assert!(test_io.received.read().contains(&ClientIoMessage::SubmitSeal(proposal.unwrap(), seal)));
+		let first = test_io.received.read().contains(&ClientIoMessage::SubmitSeal(proposal.unwrap(), seal.clone()));
+		seal[2] = precommit_signatures(&tap, h, r, Some(b.header().bare_hash()), v0, v1);
+		let second = test_io.received.read().contains(&ClientIoMessage::SubmitSeal(proposal.unwrap(), seal));
+
+		assert!(first ^ second);
 		engine.stop();
 	}
 }
diff --git a/ethcore/src/service.rs b/ethcore/src/service.rs
index 7a149c528..732d12a5b 100644
--- a/ethcore/src/service.rs
+++ b/ethcore/src/service.rs
@@ -81,9 +81,6 @@ impl ClientService {
 		panic_handler.forward_from(&io_service);
 
 		info!("Configured for {} using {} engine", Colour::White.bold().paint(spec.name.clone()), Colour::Yellow.bold().paint(spec.engine.name()));
-		if spec.fork_name.is_some() {
-			warn!("Your chain is an alternative fork. {}", Colour::Red.bold().paint("TRANSACTIONS MAY BE REPLAYED ON THE MAINNET!"));
-		}
 
 		let mut db_config = DatabaseConfig::with_columns(::db::NUM_COLUMNS);
 
diff --git a/ethcore/src/spec/spec.rs b/ethcore/src/spec/spec.rs
index f7a14ad82..bdcd5eee2 100644
--- a/ethcore/src/spec/spec.rs
+++ b/ethcore/src/spec/spec.rs
@@ -66,8 +66,8 @@ pub struct Spec {
 	pub name: String,
 	/// What engine are we using for this?
 	pub engine: Arc<Engine>,
-	/// The fork identifier for this chain. Only needed to distinguish two chains sharing the same genesis.
-	pub fork_name: Option<String>,
+	/// Name of the subdir inside the main data dir to use for chain data and settings.
+	pub data_dir: String,
 
 	/// Known nodes on the network in enode format.
 	pub nodes: Vec<String>,
@@ -110,10 +110,10 @@ impl From<ethjson::spec::Spec> for Spec {
 		let GenericSeal(seal_rlp) = g.seal.into();
 		let params = CommonParams::from(s.params);
 		Spec {
-			name: s.name.into(),
+			name: s.name.clone().into(),
 			params: params.clone(),
 			engine: Spec::engine(s.engine, params, builtins),
-			fork_name: s.fork_name.map(Into::into),
+			data_dir: s.data_dir.unwrap_or(s.name).into(),
 			nodes: s.nodes.unwrap_or_else(Vec::new),
 			parent_hash: g.parent_hash,
 			transactions_root: g.transactions_root,
diff --git a/ethcore/src/types/trace_types/localized.rs b/ethcore/src/types/trace_types/localized.rs
index 57abea362..f65c47415 100644
--- a/ethcore/src/types/trace_types/localized.rs
+++ b/ethcore/src/types/trace_types/localized.rs
@@ -21,7 +21,7 @@ use super::trace::{Action, Res};
 use header::BlockNumber;
 
 /// Localized trace.
-#[derive(Debug, PartialEq, Binary)]
+#[derive(Debug, PartialEq, Clone, Binary)]
 pub struct LocalizedTrace {
 	/// Type of action performed by a transaction.
 	pub action: Action,
diff --git a/js/package.json b/js/package.json
index 615562adc..83d7994e7 100644
--- a/js/package.json
+++ b/js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "parity.js",
-  "version": "0.2.122",
+  "version": "0.2.124",
   "main": "release/index.js",
   "jsnext:main": "src/index.js",
   "author": "Parity Team <admin@parity.io>",
diff --git a/js/src/contracts/badgereg.js b/js/src/contracts/badgereg.js
index 6cf3d8bc9..8075f456e 100644
--- a/js/src/contracts/badgereg.js
+++ b/js/src/contracts/badgereg.js
@@ -18,7 +18,8 @@ import { bytesToHex, hex2Ascii } from '~/api/util/format';
 
 import ABI from './abi/certifier.json';
 
-const ZERO = '0x0000000000000000000000000000000000000000000000000000000000000000';
+const ZERO20 = '0x0000000000000000000000000000000000000000';
+const ZERO32 = '0x0000000000000000000000000000000000000000000000000000000000000000';
 
 export default class BadgeReg {
   constructor (api, registry) {
@@ -26,32 +27,57 @@ export default class BadgeReg {
     this._registry = registry;
 
     registry.getContract('badgereg');
-    this.certifiers = {}; // by name
+    this.certifiers = []; // by id
     this.contracts = {}; // by name
   }
 
-  fetchCertifier (name) {
-    if (this.certifiers[name]) {
-      return Promise.resolve(this.certifiers[name]);
+  certifierCount () {
+    return this._registry.getContract('badgereg')
+      .then((badgeReg) => {
+        return badgeReg.instance.badgeCount.call({}, [])
+          .then((count) => count.valueOf());
+      });
+  }
+
+  fetchCertifier (id) {
+    if (this.certifiers[id]) {
+      return Promise.resolve(this.certifiers[id]);
     }
     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;
+        return badgeReg.instance.badge.call({}, [ id ]);
+      })
+      .then(([ address, name ]) => {
+        if (address === ZERO20) {
+          throw new Error(`Certifier ${id} does not exist.`);
+        }
 
-              const data = { address, name, title, icon: img };
-              this.certifiers[name] = data;
-              return data;
-            });
-        });
+        name = bytesToHex(name);
+        name = name === ZERO32
+          ? null
+          : hex2Ascii(name);
+        return this.fetchMeta(id)
+          .then(({ title, icon }) => {
+            const data = { address, id, name, title, icon };
+            this.certifiers[id] = data;
+            return data;
+          });
+      });
+  }
+
+  fetchMeta (id) {
+    return this._registry.getContract('badgereg')
+      .then((badgeReg) => {
+        return Promise.all([
+          badgeReg.instance.meta.call({}, [id, 'TITLE']),
+          badgeReg.instance.meta.call({}, [id, 'IMG'])
+        ]);
+      })
+      .then(([ title, icon ]) => {
+        title = bytesToHex(title);
+        title = title === ZERO32 ? null : hex2Ascii(title);
+        if (bytesToHex(icon) === ZERO32) icon = null;
+        return { title, icon };
       });
   }
 
diff --git a/js/src/modals/FirstRun/firstRun.js b/js/src/modals/FirstRun/firstRun.js
index a273d6e63..03bc8d770 100644
--- a/js/src/modals/FirstRun/firstRun.js
+++ b/js/src/modals/FirstRun/firstRun.js
@@ -15,6 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 import React, { Component, PropTypes } from 'react';
+import { connect } from 'react-redux';
 import ActionDone from 'material-ui/svg-icons/action/done';
 import ActionDoneAll from 'material-ui/svg-icons/action/done-all';
 import NavigationArrowForward from 'material-ui/svg-icons/navigation/arrow-forward';
@@ -35,14 +36,15 @@ import ParityLogo from '../../../assets/images/parity-logo-black-no-text.svg';
 
 const STAGE_NAMES = ['welcome', 'terms', 'new account', 'recovery', 'completed'];
 
-export default class FirstRun extends Component {
+class FirstRun extends Component {
   static contextTypes = {
     api: PropTypes.object.isRequired,
     store: PropTypes.object.isRequired
   }
 
   static propTypes = {
-    visible: PropTypes.bool,
+    hasAccounts: PropTypes.bool.isRequired,
+    visible: PropTypes.bool.isRequired,
     onClose: PropTypes.func.isRequired
   }
 
@@ -109,6 +111,7 @@ export default class FirstRun extends Component {
   }
 
   renderDialogActions () {
+    const { hasAccounts } = this.props;
     const { canCreate, stage, hasAcceptedTnc } = this.state;
 
     switch (stage) {
@@ -130,13 +133,26 @@ export default class FirstRun extends Component {
         );
 
       case 2:
-        return (
+        const buttons = [
           <Button
             icon={ <ActionDone /> }
             label='Create'
+            key='create'
             disabled={ !canCreate }
-            onClick={ this.onCreate } />
-        );
+            onClick={ this.onCreate }
+          />
+        ];
+        if (hasAccounts) {
+          buttons.unshift(
+            <Button
+              icon={ <NavigationArrowForward /> }
+              label='Skip'
+              key='skip'
+              onClick={ this.skipAccountCreation }
+            />
+          );
+        }
+        return buttons;
 
       case 3:
         return [
@@ -219,6 +235,10 @@ export default class FirstRun extends Component {
       });
   }
 
+  skipAccountCreation = () => {
+    this.setState({ stage: this.state.stage + 2 });
+  }
+
   newError = (error) => {
     const { store } = this.context;
 
@@ -232,3 +252,9 @@ export default class FirstRun extends Component {
     print(recoveryPage({ phrase, name, identity, address, logo: ParityLogo }));
   }
 }
+
+function mapStateToProps (state) {
+  return { hasAccounts: state.personal.hasAccounts };
+}
+
+export default connect(mapStateToProps, null)(FirstRun);
diff --git a/js/src/redux/providers/certifications/actions.js b/js/src/redux/providers/certifications/actions.js
index 03bb93fe9..10f4ce9fd 100644
--- a/js/src/redux/providers/certifications/actions.js
+++ b/js/src/redux/providers/certifications/actions.js
@@ -14,10 +14,18 @@
 // 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 fetchCertifiers = () => ({
+  type: 'fetchCertifiers'
+});
+
 export const fetchCertifications = (address) => ({
   type: 'fetchCertifications', address
 });
 
-export const addCertification = (address, name, title, icon) => ({
-  type: 'addCertification', address, name, title, icon
+export const addCertification = (address, id, name, title, icon) => ({
+  type: 'addCertification', address, id, name, title, icon
+});
+
+export const removeCertification = (address, id) => ({
+  type: 'removeCertification', address, id
 });
diff --git a/js/src/redux/providers/certifications/middleware.js b/js/src/redux/providers/certifications/middleware.js
index 500fe39b3..6e4b898d0 100644
--- a/js/src/redux/providers/certifications/middleware.js
+++ b/js/src/redux/providers/certifications/middleware.js
@@ -14,38 +14,90 @@
 // 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';
+import { uniq } from 'lodash';
 
-const knownCertifiers = [ 'smsverification' ];
+import ABI from '~/contracts/abi/certifier.json';
+import Contract from '~/api/contract';
+import Contracts from '~/contracts';
+import { addCertification, removeCertification } from './actions';
 
 export default class CertificationsMiddleware {
   toMiddleware () {
-    return (store) => (next) => (action) => {
-      if (action.type !== 'fetchCertifications') {
-        return next(action);
-      }
+    const api = Contracts.get()._api;
+    const badgeReg = Contracts.get().badgeReg;
+    const contract = new Contract(api, ABI);
+    const Confirmed = contract.events.find((e) => e.name === 'Confirmed');
+    const Revoked = contract.events.find((e) => e.name === 'Revoked');
 
-      const { address } = action;
-      const badgeReg = Contracts.get().badgeReg;
+    let certifiers = [];
+    let accounts = []; // these are addresses
 
-      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);
+    const fetchConfirmedEvents = (dispatch) => {
+      if (certifiers.length === 0 || accounts.length === 0) return;
+      api.eth.getLogs({
+        fromBlock: 0,
+        toBlock: 'latest',
+        address: certifiers.map((c) => c.address),
+        topics: [ [ Confirmed.signature, Revoked.signature ], accounts ]
+      })
+        .then((logs) => contract.parseEventLogs(logs))
+        .then((logs) => {
+          logs.forEach((log) => {
+            const certifier = certifiers.find((c) => c.address === log.address);
+            if (!certifier) {
+              throw new Error(`Could not find certifier at ${log.address}.`);
+            }
+            const { id, name, title, icon } = certifier;
+
+            if (log.event === 'Revoked') {
+              dispatch(removeCertification(log.params.who.value, id));
+            } else {
+              dispatch(addCertification(log.params.who.value, id, name, title, icon));
             }
           });
-      });
+        })
+        .catch((err) => {
+          console.error('Failed to fetch Confirmed events:', err);
+        });
+    };
+
+    return (store) => (next) => (action) => {
+      switch (action.type) {
+        case 'fetchCertifiers':
+          badgeReg.certifierCount().then((count) => {
+            new Array(+count).fill(null).forEach((_, id) => {
+              badgeReg.fetchCertifier(id)
+                .then((cert) => {
+                  if (!certifiers.some((c) => c.id === cert.id)) {
+                    certifiers = certifiers.concat(cert);
+                    fetchConfirmedEvents(store.dispatch);
+                  }
+                })
+                .catch((err) => {
+                  console.warn(`Could not fetch certifier ${id}:`, err);
+                });
+            });
+          });
+
+          break;
+        case 'fetchCertifications':
+          const { address } = action;
+
+          if (!accounts.includes(address)) {
+            accounts = accounts.concat(address);
+            fetchConfirmedEvents(store.dispatch);
+          }
+
+          break;
+        case 'setVisibleAccounts':
+          const { addresses } = action;
+          accounts = uniq(accounts.concat(addresses));
+          fetchConfirmedEvents(store.dispatch);
+
+          break;
+        default:
+          next(action);
+      }
     };
   }
 }
diff --git a/js/src/redux/providers/certifications/reducer.js b/js/src/redux/providers/certifications/reducer.js
index f9195b1df..bb2681cf6 100644
--- a/js/src/redux/providers/certifications/reducer.js
+++ b/js/src/redux/providers/certifications/reducer.js
@@ -17,17 +17,27 @@
 const initialState = {};
 
 export default (state = initialState, action) => {
-  if (action.type !== 'addCertification') {
-    return state;
+  if (action.type === 'addCertification') {
+    const { address, id, name, icon, title } = action;
+    const certifications = state[address] || [];
+
+    if (certifications.some((c) => c.id === id)) {
+      return state;
+    }
+
+    const newCertifications = certifications.concat({
+      id, name, icon, title
+    });
+    return { ...state, [address]: newCertifications };
   }
 
-  const { address, name, icon, title } = action;
-  const certifications = state[address] || [];
+  if (action.type === 'removeCertification') {
+    const { address, id } = action;
+    const certifications = state[address] || [];
 
-  if (certifications.some((c) => c.name === name)) {
-    return state;
+    const newCertifications = certifications.filter((c) => c.id !== id);
+    return { ...state, [address]: newCertifications };
   }
-  const newCertifications = certifications.concat({ name, icon, title });
 
-  return { ...state, [address]: newCertifications };
+  return state;
 };
diff --git a/js/src/ui/Certifications/certifications.js b/js/src/ui/Certifications/certifications.js
index edf8be10a..bafd06f35 100644
--- a/js/src/ui/Certifications/certifications.js
+++ b/js/src/ui/Certifications/certifications.js
@@ -16,10 +16,8 @@
 
 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';
 
@@ -29,14 +27,7 @@ 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);
+    dappsUrl: PropTypes.string.isRequired
   }
 
   render () {
@@ -73,15 +64,13 @@ function mapStateToProps (_, initProps) {
 
   return (state) => {
     const certifications = state.certifications[account] || [];
-    return { certifications };
-  };
-}
+    const dappsUrl = state.api.dappsUrl;
 
-function mapDispatchToProps (dispatch) {
-  return bindActionCreators({ fetchCertifications }, dispatch);
+    return { certifications, dappsUrl };
+  };
 }
 
 export default connect(
   mapStateToProps,
-  mapDispatchToProps
+  null
 )(Certifications);
diff --git a/js/src/views/Account/Header/header.js b/js/src/views/Account/Header/header.js
index b2e0a9c28..058c20db3 100644
--- a/js/src/views/Account/Header/header.js
+++ b/js/src/views/Account/Header/header.js
@@ -23,10 +23,6 @@ import Certifications from '~/ui/Certifications';
 import styles from './header.css';
 
 export default class Header extends Component {
-  static contextTypes = {
-    api: PropTypes.object
-  };
-
   static propTypes = {
     account: PropTypes.object,
     balance: PropTypes.object,
@@ -44,7 +40,6 @@ export default class Header extends Component {
   };
 
   render () {
-    const { api } = this.context;
     const { account, balance, className, children, hideName } = this.props;
     const { address, meta, uuid } = account;
 
@@ -85,7 +80,6 @@ export default class Header extends Component {
               balance={ balance } />
             <Certifications
               account={ account.address }
-              dappsUrl={ api.dappsUrl }
             />
           </div>
           { children }
diff --git a/js/src/views/Account/account.js b/js/src/views/Account/account.js
index 38c712622..82b2e6b71 100644
--- a/js/src/views/Account/account.js
+++ b/js/src/views/Account/account.js
@@ -31,6 +31,7 @@ import shapeshiftBtn from '~/../assets/images/shapeshift-btn.png';
 import Header from './Header';
 import Transactions from './Transactions';
 import { setVisibleAccounts } from '~/redux/providers/personalActions';
+import { fetchCertifiers, fetchCertifications } from '~/redux/providers/certifications/actions';
 
 import SMSVerificationStore from '~/modals/Verification/sms-store';
 import EmailVerificationStore from '~/modals/Verification/email-store';
@@ -44,6 +45,8 @@ class Account extends Component {
 
   static propTypes = {
     setVisibleAccounts: PropTypes.func.isRequired,
+    fetchCertifiers: PropTypes.func.isRequired,
+    fetchCertifications: PropTypes.func.isRequired,
     images: PropTypes.object.isRequired,
 
     params: PropTypes.object,
@@ -63,6 +66,7 @@ class Account extends Component {
   }
 
   componentDidMount () {
+    this.props.fetchCertifiers();
     this.setVisibleAccounts();
   }
 
@@ -80,9 +84,10 @@ class Account extends Component {
   }
 
   setVisibleAccounts (props = this.props) {
-    const { params, setVisibleAccounts } = props;
+    const { params, setVisibleAccounts, fetchCertifications } = props;
     const addresses = [ params.address ];
     setVisibleAccounts(addresses);
+    fetchCertifications(params.address);
   }
 
   render () {
@@ -353,7 +358,9 @@ function mapStateToProps (state) {
 
 function mapDispatchToProps (dispatch) {
   return bindActionCreators({
-    setVisibleAccounts
+    setVisibleAccounts,
+    fetchCertifiers,
+    fetchCertifications
   }, dispatch);
 }
 
diff --git a/js/src/views/Accounts/List/list.js b/js/src/views/Accounts/List/list.js
index f08c9fdb0..d5bdd9662 100644
--- a/js/src/views/Accounts/List/list.js
+++ b/js/src/views/Accounts/List/list.js
@@ -15,22 +15,29 @@
 // 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 { Container } from '~/ui';
+import { fetchCertifiers, fetchCertifications } from '~/redux/providers/certifications/actions';
 
 import Summary from '../Summary';
 import styles from './list.css';
 
-export default class List extends Component {
+class List extends Component {
   static propTypes = {
     accounts: PropTypes.object,
-    walletsOwners: PropTypes.object,
     balances: PropTypes.object,
-    link: PropTypes.string,
-    search: PropTypes.array,
+    certifications: PropTypes.object.isRequired,
     empty: PropTypes.bool,
+    link: PropTypes.string,
     order: PropTypes.string,
     orderFallback: PropTypes.string,
+    search: PropTypes.array,
+    walletsOwners: PropTypes.object,
+
+    fetchCertifiers: PropTypes.func.isRequired,
+    fetchCertifications: PropTypes.func.isRequired,
     handleAddSearchToken: PropTypes.func
   };
 
@@ -42,8 +49,16 @@ export default class List extends Component {
     );
   }
 
+  componentWillMount () {
+    const { accounts, fetchCertifiers, fetchCertifications } = this.props;
+    fetchCertifiers();
+    for (let address in accounts) {
+      fetchCertifications(address);
+    }
+  }
+
   renderAccounts () {
-    const { accounts, balances, link, empty, handleAddSearchToken, walletsOwners } = this.props;
+    const { accounts, balances, empty, link, walletsOwners, handleAddSearchToken } = this.props;
 
     if (empty) {
       return (
@@ -72,7 +87,9 @@ export default class List extends Component {
             account={ account }
             balance={ balance }
             owners={ owners }
-            handleAddSearchToken={ handleAddSearchToken } />
+            handleAddSearchToken={ handleAddSearchToken }
+            showCertifications
+          />
         </div>
       );
     });
@@ -207,3 +224,20 @@ export default class List extends Component {
       });
   }
 }
+
+function mapStateToProps (state) {
+  const { certifications } = state;
+  return { certifications };
+}
+
+function mapDispatchToProps (dispatch) {
+  return bindActionCreators({
+    fetchCertifiers,
+    fetchCertifications
+  }, dispatch);
+}
+
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(List);
diff --git a/js/src/views/Accounts/Summary/summary.js b/js/src/views/Accounts/Summary/summary.js
index 98d4642fd..3b1d64d18 100644
--- a/js/src/views/Accounts/Summary/summary.js
+++ b/js/src/views/Accounts/Summary/summary.js
@@ -21,6 +21,7 @@ import { isEqual } from 'lodash';
 import ReactTooltip from 'react-tooltip';
 
 import { Balance, Container, ContainerTitle, IdentityIcon, IdentityName, Tags, Input } from '~/ui';
+import Certifications from '~/ui/Certifications';
 import { nullableProptype } from '~/util/proptypes';
 
 import styles from '../accounts.css';
@@ -36,12 +37,14 @@ export default class Summary extends Component {
     link: PropTypes.string,
     name: PropTypes.string,
     noLink: PropTypes.bool,
+    showCertifications: PropTypes.bool,
     handleAddSearchToken: PropTypes.func,
     owners: nullableProptype(PropTypes.array)
   };
 
   static defaultProps = {
-    noLink: false
+    noLink: false,
+    showCertifications: false
   };
 
   shouldComponentUpdate (nextProps) {
@@ -115,6 +118,7 @@ export default class Summary extends Component {
 
         { this.renderOwners() }
         { this.renderBalance() }
+        { this.renderCertifications() }
       </Container>
     );
   }
@@ -181,4 +185,15 @@ export default class Summary extends Component {
       <Balance balance={ balance } />
     );
   }
+
+  renderCertifications () {
+    const { showCertifications, account } = this.props;
+    if (!showCertifications) {
+      return null;
+    }
+
+    return (
+      <Certifications account={ account.address } />
+    );
+  }
 }
diff --git a/js/src/views/Application/store.js b/js/src/views/Application/store.js
index bb42721cd..b9f960eff 100644
--- a/js/src/views/Application/store.js
+++ b/js/src/views/Application/store.js
@@ -16,14 +16,17 @@
 
 import { action, observable } from 'mobx';
 
-const showFirstRun = window.localStorage.getItem('showFirstRun') !== '0';
-
 export default class Store {
-  @observable firstrunVisible = showFirstRun;
+  @observable firstrunVisible = false;
 
   constructor (api) {
     this._api = api;
 
+    const value = window.localStorage.getItem('showFirstRun');
+    if (value) {
+      this.firstrunVisible = JSON.parse(value);
+    }
+
     this._checkAccounts();
   }
 
@@ -33,7 +36,7 @@ export default class Store {
 
   @action toggleFirstrun = (visible = false) => {
     this.firstrunVisible = visible;
-    window.localStorage.setItem('showFirstRun', visible ? '1' : '0');
+    window.localStorage.setItem('showFirstRun', JSON.stringify(!!visible));
   }
 
   _checkAccounts () {
diff --git a/json/src/spec/spec.rs b/json/src/spec/spec.rs
index 22d6b36d8..fb289f11b 100644
--- a/json/src/spec/spec.rs
+++ b/json/src/spec/spec.rs
@@ -27,8 +27,8 @@ pub struct Spec {
 	/// Spec name.
 	pub name: String,
 	/// Special fork name.
-	#[serde(rename="forkName")]
-	pub fork_name: Option<String>,
+	#[serde(rename="dataDir")]
+	pub data_dir: Option<String>,
 	/// Engine.
 	pub engine: Engine,
 	/// Spec params.
@@ -57,6 +57,7 @@ mod tests {
 	fn spec_deserialization() {
 		let s = r#"{
 	"name": "Morden",
+	"dataDir": "morden",
 	"engine": {
 		"Ethash": {
 			"params": {
diff --git a/parity/account.rs b/parity/account.rs
index e790eb596..15e712413 100644
--- a/parity/account.rs
+++ b/parity/account.rs
@@ -14,23 +14,32 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+use std::path::PathBuf;
 use ethcore::ethstore::{EthStore, SecretStore, import_accounts, read_geth_accounts};
 use ethcore::ethstore::dir::DiskDirectory;
 use ethcore::account_provider::AccountProvider;
 use helpers::{password_prompt, password_from_file};
+use params::SpecType;
 
 #[derive(Debug, PartialEq)]
 pub enum AccountCmd {
 	New(NewAccount),
-	List(String),
+	List(ListAccounts),
 	Import(ImportAccounts),
 	ImportFromGeth(ImportFromGethAccounts)
 }
 
+#[derive(Debug, PartialEq)]
+pub struct ListAccounts {
+	pub path: String,
+	pub spec: SpecType,
+}
+
 #[derive(Debug, PartialEq)]
 pub struct NewAccount {
 	pub iterations: u32,
 	pub path: String,
+	pub spec: SpecType,
 	pub password_file: Option<String>,
 }
 
@@ -38,6 +47,7 @@ pub struct NewAccount {
 pub struct ImportAccounts {
 	pub from: Vec<String>,
 	pub to: String,
+	pub spec: SpecType,
 }
 
 /// Parameters for geth accounts' import 
@@ -47,18 +57,22 @@ pub struct ImportFromGethAccounts {
 	pub testnet: bool,
 	/// directory to import accounts to
 	pub to: String,
+	pub spec: SpecType,
 }
 
 pub fn execute(cmd: AccountCmd) -> Result<String, String> {
 	match cmd {
 		AccountCmd::New(new_cmd) => new(new_cmd),
-		AccountCmd::List(path) => list(path),
+		AccountCmd::List(list_cmd) => list(list_cmd),
 		AccountCmd::Import(import_cmd) => import(import_cmd),
 		AccountCmd::ImportFromGeth(import_geth_cmd) => import_geth(import_geth_cmd)
 	}
 }
 
-fn keys_dir(path: String) -> Result<DiskDirectory, String> {
+fn keys_dir(path: String, spec: SpecType) -> Result<DiskDirectory, String> {
+	let spec = try!(spec.spec());
+	let mut path = PathBuf::from(&path);
+	path.push(spec.data_dir);
 	DiskDirectory::create(path).map_err(|e| format!("Could not open keys directory: {}", e))
 }
 
@@ -75,15 +89,15 @@ fn new(n: NewAccount) -> Result<String, String> {
 		None => try!(password_prompt()),
 	};
 
-	let dir = Box::new(try!(keys_dir(n.path)));
+	let dir = Box::new(try!(keys_dir(n.path, n.spec)));
 	let secret_store = Box::new(try!(secret_store(dir, Some(n.iterations))));
 	let acc_provider = AccountProvider::new(secret_store);
 	let new_account = try!(acc_provider.new_account(&password).map_err(|e| format!("Could not create new account: {}", e)));
 	Ok(format!("{:?}", new_account))
 }
 
-fn list(path: String) -> Result<String, String> {
-	let dir = Box::new(try!(keys_dir(path)));
+fn list(list_cmd: ListAccounts) -> Result<String, String> {
+	let dir = Box::new(try!(keys_dir(list_cmd.path, list_cmd.spec)));
 	let secret_store = Box::new(try!(secret_store(dir, None)));
 	let acc_provider = AccountProvider::new(secret_store);
 	let accounts = acc_provider.accounts();
@@ -96,7 +110,7 @@ fn list(path: String) -> Result<String, String> {
 }
 
 fn import(i: ImportAccounts) -> Result<String, String> {
-	let to = try!(keys_dir(i.to));
+	let to = try!(keys_dir(i.to, i.spec));
 	let mut imported = 0;
 	for path in &i.from {
 		let from = DiskDirectory::at(path);
@@ -109,7 +123,7 @@ fn import_geth(i: ImportFromGethAccounts) -> Result<String, String> {
 	use std::io::ErrorKind;
 	use ethcore::ethstore::Error;
 
-	let dir = Box::new(try!(keys_dir(i.to)));
+	let dir = Box::new(try!(keys_dir(i.to, i.spec)));
 	let secret_store = Box::new(try!(secret_store(dir, None)));
 	let geth_accounts = read_geth_accounts(i.testnet);
 	match secret_store.import_geth_accounts(geth_accounts, i.testnet) {
diff --git a/parity/blockchain.rs b/parity/blockchain.rs
index 10fe1d32e..94e9e7709 100644
--- a/parity/blockchain.rs
+++ b/parity/blockchain.rs
@@ -64,11 +64,19 @@ impl FromStr for DataFormat {
 
 #[derive(Debug, PartialEq)]
 pub enum BlockchainCmd {
+	Kill(KillBlockchain),
 	Import(ImportBlockchain),
 	Export(ExportBlockchain),
 	ExportState(ExportState),
 }
 
+#[derive(Debug, PartialEq)]
+pub struct KillBlockchain {
+	pub spec: SpecType,
+	pub dirs: Directories,
+	pub pruning: Pruning,
+}
+
 #[derive(Debug, PartialEq)]
 pub struct ImportBlockchain {
 	pub spec: SpecType,
@@ -128,6 +136,7 @@ pub struct ExportState {
 
 pub fn execute(cmd: BlockchainCmd) -> Result<String, String> {
 	match cmd {
+		BlockchainCmd::Kill(kill_cmd) => kill_db(kill_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),
@@ -140,9 +149,6 @@ fn execute_import(cmd: ImportBlockchain) -> Result<String, String> {
 	// Setup panic handler
 	let panic_handler = PanicHandler::new_in_arc();
 
-	// create dirs used by parity
-	try!(cmd.dirs.create_dirs(false, false));
-
 	// load spec file
 	let spec = try!(cmd.spec.spec());
 
@@ -150,7 +156,7 @@ fn execute_import(cmd: ImportBlockchain) -> Result<String, String> {
 	let genesis_hash = spec.genesis_header().hash();
 
 	// database paths
-	let db_dirs = cmd.dirs.database(genesis_hash, spec.fork_name.clone());
+	let db_dirs = cmd.dirs.database(genesis_hash, None, spec.data_dir.clone());
 
 	// user defaults path
 	let user_defaults_path = db_dirs.user_defaults_path();
@@ -174,7 +180,10 @@ fn execute_import(cmd: ImportBlockchain) -> Result<String, String> {
 	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, cmd.compaction.compaction_profile(db_dirs.db_root_path().as_path())));
+
+	// create dirs used by parity
+	try!(cmd.dirs.create_dirs(false, false));
 
 	// prepare client config
 	let mut client_config = to_client_config(
@@ -311,9 +320,6 @@ fn start_client(
 	wal: bool,
 	cache_config: CacheConfig) -> Result<ClientService, String> {
 
-	// create dirs used by parity
-	try!(dirs.create_dirs(false, false));
-
 	// load spec file
 	let spec = try!(spec.spec());
 
@@ -321,7 +327,7 @@ fn start_client(
 	let genesis_hash = spec.genesis_header().hash();
 
 	// database paths
-	let db_dirs = dirs.database(genesis_hash, spec.fork_name.clone());
+	let db_dirs = dirs.database(genesis_hash, None, spec.data_dir.clone());
 
 	// user defaults path
 	let user_defaults_path = db_dirs.user_defaults_path();
@@ -345,7 +351,10 @@ fn start_client(
 	let snapshot_path = db_dirs.snapshot_path();
 
 	// execute upgrades
-	try!(execute_upgrades(&db_dirs, algorithm, compaction.compaction_profile(db_dirs.fork_path().as_path())));
+	try!(execute_upgrades(&db_dirs, algorithm, compaction.compaction_profile(db_dirs.db_root_path().as_path())));
+
+	// create dirs used by parity
+	try!(dirs.create_dirs(false, false));
 
 	// prepare client config
 	let client_config = to_client_config(&cache_config, Mode::Active, tracing, fat_db, compaction, wal, VMType::default(), "".into(), algorithm, pruning_history, true);
@@ -473,6 +482,18 @@ fn execute_export_state(cmd: ExportState) -> Result<String, String> {
 	Ok("Export completed.".into())
 }
 
+pub fn kill_db(cmd: KillBlockchain) -> Result<String, String> {
+	let spec = try!(cmd.spec.spec());
+	let genesis_hash = spec.genesis_header().hash();
+	let db_dirs = cmd.dirs.database(genesis_hash, None, spec.data_dir);
+	let user_defaults_path = db_dirs.user_defaults_path();
+	let user_defaults = try!(UserDefaults::load(&user_defaults_path));
+	let algorithm = cmd.pruning.to_algorithm(&user_defaults);
+	let dir = db_dirs.db_path(algorithm);
+	try!(fs::remove_dir_all(&dir).map_err(|e| format!("Error removing database: {:?}", e)));
+	Ok("Database deleted.".to_owned())
+}
+
 #[cfg(test)]
 mod test {
 	use super::DataFormat;
diff --git a/parity/cli/mod.rs b/parity/cli/mod.rs
index 39e4d5867..0b2cbad28 100644
--- a/parity/cli/mod.rs
+++ b/parity/cli/mod.rs
@@ -16,6 +16,7 @@
 
 #[macro_use]
 mod usage;
+use dir::default_data_path;
 
 usage! {
 	{
@@ -36,6 +37,8 @@ usage! {
 		cmd_ui: bool,
 		cmd_tools: bool,
 		cmd_hash: bool,
+		cmd_kill: bool,
+		cmd_db: bool,
 
 		// Arguments
 		arg_pid_file: String,
@@ -80,8 +83,8 @@ usage! {
 		flag_mode_timeout: u64 = 300u64, or |c: &Config| otry!(c.parity).mode_timeout.clone(),
 		flag_mode_alarm: u64 = 3600u64, or |c: &Config| otry!(c.parity).mode_alarm.clone(),
 		flag_chain: String = "homestead", or |c: &Config| otry!(c.parity).chain.clone(),
-		flag_db_path: String = "$HOME/.parity", or |c: &Config| otry!(c.parity).db_path.clone(),
-		flag_keys_path: String = "$HOME/.parity/keys", or |c: &Config| otry!(c.parity).keys_path.clone(),
+		flag_db_path: String = default_data_path(), or |c: &Config| otry!(c.parity).db_path.clone(),
+		flag_keys_path: String = "$DATA/keys", or |c: &Config| otry!(c.parity).keys_path.clone(),
 		flag_identity: String = "", or |c: &Config| otry!(c.parity).identity.clone(),
 
 		// -- Account Options
@@ -100,7 +103,7 @@ usage! {
 			or |c: &Config| otry!(c.ui).port.clone(),
 		flag_ui_interface: String = "local",
 			or |c: &Config| otry!(c.ui).interface.clone(),
-		flag_ui_path: String = "$HOME/.parity/signer",
+		flag_ui_path: String = "$DATA/signer",
 			or |c: &Config| otry!(c.ui).path.clone(),
 		// NOTE [todr] For security reasons don't put this to config files
 		flag_ui_no_validation: bool = false, or |_| None,
@@ -156,7 +159,7 @@ usage! {
 		// IPC
 		flag_no_ipc: bool = false,
 			or |c: &Config| otry!(c.ipc).disable.clone(),
-		flag_ipc_path: String = "$HOME/.parity/jsonrpc.ipc",
+		flag_ipc_path: String = "$DATA/jsonrpc.ipc",
 			or |c: &Config| otry!(c.ipc).path.clone(),
 		flag_ipc_apis: String = "web3,eth,net,parity,parity_accounts,traces,rpc",
 			or |c: &Config| otry!(c.ipc).apis.clone().map(|vec| vec.join(",")),
@@ -170,7 +173,7 @@ usage! {
 			or |c: &Config| otry!(c.dapps).interface.clone(),
 		flag_dapps_hosts: String = "none",
 			or |c: &Config| otry!(c.dapps).hosts.clone().map(|vec| vec.join(",")),
-		flag_dapps_path: String = "$HOME/.parity/dapps",
+		flag_dapps_path: String = "$DATA/dapps",
 			or |c: &Config| otry!(c.dapps).path.clone(),
 		flag_dapps_user: Option<String> = None,
 			or |c: &Config| otry!(c.dapps).user.clone().map(Some),
@@ -271,7 +274,7 @@ usage! {
 			or |c: &Config| otry!(c.vm).jit.clone(),
 
 		// -- Miscellaneous Options
-		flag_config: String = "$HOME/.parity/config.toml", or |_| None,
+		flag_config: String = "$DATA/config.toml", or |_| None,
 		flag_logging: Option<String> = None,
 			or |c: &Config| otry!(c.misc).logging.clone().map(Some),
 		flag_log_file: Option<String> = None,
@@ -512,6 +515,8 @@ mod tests {
 			cmd_ui: false,
 			cmd_tools: false,
 			cmd_hash: false,
+			cmd_db: false,
+			cmd_kill: false,
 
 			// Arguments
 			arg_pid_file: "".into(),
@@ -665,7 +670,7 @@ mod tests {
 
 			// -- Miscellaneous Options
 			flag_version: false,
-			flag_config: "$HOME/.parity/config.toml".into(),
+			flag_config: "$DATA/config.toml".into(),
 			flag_logging: Some("own_tx=trace".into()),
 			flag_log_file: Some("/var/log/parity.log".into()),
 			flag_no_color: false,
diff --git a/parity/cli/usage.rs b/parity/cli/usage.rs
index cd94e0299..8c8b54c87 100644
--- a/parity/cli/usage.rs
+++ b/parity/cli/usage.rs
@@ -145,7 +145,7 @@ macro_rules! usage {
 				}
 
 				let config_file = raw_args.flag_config.clone().unwrap_or_else(|| raw_args.clone().into_args(Config::default()).flag_config);
-				let config_file = replace_home(&config_file);
+				let config_file = replace_home("", &config_file);
 				let config = match (fs::File::open(&config_file), raw_args.flag_config.is_some()) {
 					// Load config file
 					(Ok(mut file), _) => {
diff --git a/parity/cli/usage.txt b/parity/cli/usage.txt
index 1e99c76fe..13f1ed491 100644
--- a/parity/cli/usage.txt
+++ b/parity/cli/usage.txt
@@ -15,6 +15,7 @@ Usage:
   parity snapshot <file> [options]
   parity restore [ <file> ] [options]
   parity tools hash <file>
+  parity db kill [options]
 
 Operating Options:
   --mode MODE              Set the operating mode. MODE can be one of:
@@ -282,10 +283,8 @@ Import/Export Options:
                            (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})
+                           index, hash, or 'latest'. (default: {flag_at})
+  --no-storage             Don't export account storage. (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:?})
diff --git a/parity/configuration.rs b/parity/configuration.rs
index 59333c883..9afbb30ee 100644
--- a/parity/configuration.rs
+++ b/parity/configuration.rs
@@ -38,9 +38,9 @@ use dir::Directories;
 use dapps::Configuration as DappsConfiguration;
 use signer::{Configuration as SignerConfiguration};
 use run::RunCmd;
-use blockchain::{BlockchainCmd, ImportBlockchain, ExportBlockchain, ExportState, DataFormat};
+use blockchain::{BlockchainCmd, ImportBlockchain, ExportBlockchain, KillBlockchain, ExportState, DataFormat};
 use presale::ImportWallet;
-use account::{AccountCmd, NewAccount, ImportAccounts, ImportFromGethAccounts};
+use account::{AccountCmd, NewAccount, ListAccounts, ImportAccounts, ImportFromGethAccounts};
 use snapshot::{self, SnapshotCommand};
 
 #[derive(Debug, PartialEq)]
@@ -107,20 +107,32 @@ impl Configuration {
 			Cmd::SignerToken(signer_conf)
 		} else if self.args.cmd_tools && self.args.cmd_hash {
 			Cmd::Hash(self.args.arg_file)
+		} else if self.args.cmd_db && self.args.cmd_kill {
+			Cmd::Blockchain(BlockchainCmd::Kill(KillBlockchain {
+				spec: spec,
+				dirs: dirs,
+				pruning: pruning,
+			}))
 		} else if self.args.cmd_account {
 			let account_cmd = if self.args.cmd_new {
 				let new_acc = NewAccount {
 					iterations: self.args.flag_keys_iterations,
 					path: dirs.keys,
+					spec: spec,
 					password_file: self.args.flag_password.first().cloned(),
 				};
 				AccountCmd::New(new_acc)
 			} else if self.args.cmd_list {
-				AccountCmd::List(dirs.keys)
+				let list_acc = ListAccounts {
+					path: dirs.keys,
+					spec: spec,
+				};
+				AccountCmd::List(list_acc)
 			} else if self.args.cmd_import {
 				let import_acc = ImportAccounts {
 					from: self.args.arg_path.clone(),
 					to: dirs.keys,
+					spec: spec,
 				};
 				AccountCmd::Import(import_acc)
 			} else {
@@ -130,6 +142,7 @@ impl Configuration {
 		} else if self.args.flag_import_geth_keys {
         	let account_cmd = AccountCmd::ImportFromGeth(
 				ImportFromGethAccounts {
+					spec: spec,
 					to: dirs.keys,
 					testnet: self.args.flag_testnet
 				}
@@ -139,6 +152,7 @@ impl Configuration {
 			let presale_cmd = ImportWallet {
 				iterations: self.args.flag_keys_iterations,
 				path: dirs.keys,
+				spec: spec,
 				wallet_path: self.args.arg_path.first().unwrap().clone(),
 				password_file: self.args.flag_password.first().cloned(),
 			};
@@ -530,7 +544,7 @@ impl Configuration {
 		ret.snapshot_peers = self.snapshot_peers();
 		ret.allow_ips = try!(self.allow_ips());
 		ret.max_pending_peers = self.max_pending_peers();
-		let mut net_path = PathBuf::from(self.directories().db);
+		let mut net_path = PathBuf::from(self.directories().data);
 		net_path.push("network");
 		ret.config_path = Some(net_path.to_str().unwrap().to_owned());
 		ret.reserved_nodes = try!(self.init_reserved_nodes());
@@ -624,18 +638,11 @@ impl Configuration {
 	fn directories(&self) -> Directories {
 		use util::path;
 
-		let db_path = replace_home(self.args.flag_datadir.as_ref().unwrap_or(&self.args.flag_db_path));
+		let data_path = replace_home("", self.args.flag_datadir.as_ref().unwrap_or(&self.args.flag_db_path));
 
-		let keys_path = replace_home(
-			if self.args.flag_testnet {
-				"$HOME/.parity/testnet_keys"
-			} else {
-				&self.args.flag_keys_path
-			}
-		);
-
-		let dapps_path = replace_home(&self.args.flag_dapps_path);
-		let ui_path = replace_home(&self.args.flag_ui_path);
+		let keys_path = replace_home(&data_path, &self.args.flag_keys_path);
+		let dapps_path = replace_home(&data_path, &self.args.flag_dapps_path);
+		let ui_path = replace_home(&data_path, &self.args.flag_ui_path);
 
 		if self.args.flag_geth  && !cfg!(windows) {
 			let geth_root  = if self.args.flag_testnet { path::ethereum::test() } else {  path::ethereum::default() };
@@ -644,7 +651,7 @@ impl Configuration {
 		}
 
 		if cfg!(feature = "ipc") && !cfg!(feature = "windows") {
-			let mut path_buf = PathBuf::from(db_path.clone());
+			let mut path_buf = PathBuf::from(data_path.clone());
 			path_buf.push("ipc");
 			let ipc_path = path_buf.to_str().unwrap();
 			::std::fs::create_dir_all(ipc_path).unwrap_or_else(
@@ -654,7 +661,7 @@ impl Configuration {
 
 		Directories {
 			keys: keys_path,
-			db: db_path,
+			data: data_path,
 			dapps: dapps_path,
 			signer: ui_path,
 		}
@@ -664,7 +671,7 @@ impl Configuration {
 		if self.args.flag_geth {
 			geth_ipc_path(self.args.flag_testnet)
 		} else {
-			parity_ipc_path(&self.args.flag_ipcpath.clone().unwrap_or(self.args.flag_ipc_path.clone()))
+			parity_ipc_path(&self.directories().data, &self.args.flag_ipcpath.clone().unwrap_or(self.args.flag_ipc_path.clone()))
 		}
 	}
 
@@ -732,12 +739,14 @@ mod tests {
 	use ethcore_rpc::NetworkSettings;
 	use ethcore::client::{VMType, BlockId};
 	use ethcore::miner::{MinerOptions, PrioritizationStrategy};
-	use helpers::{replace_home, default_network_config};
+	use helpers::{default_network_config};
 	use run::RunCmd;
+	use dir::Directories;
 	use signer::{Configuration as SignerConfiguration};
 	use blockchain::{BlockchainCmd, ImportBlockchain, ExportBlockchain, DataFormat, ExportState};
 	use presale::ImportWallet;
-	use account::{AccountCmd, NewAccount, ImportAccounts};
+	use params::SpecType;
+	use account::{AccountCmd, NewAccount, ImportAccounts, ListAccounts};
 	use devtools::{RandomTempPath};
 	use std::io::Write;
 	use std::fs::{File, create_dir};
@@ -764,8 +773,9 @@ mod tests {
 		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap().cmd, Cmd::Account(AccountCmd::New(NewAccount {
 			iterations: 10240,
-			path: replace_home("$HOME/.parity/keys"),
+			path: Directories::default().keys,
 			password_file: None,
+			spec: SpecType::default(),
 		})));
 	}
 
@@ -774,7 +784,10 @@ mod tests {
 		let args = vec!["parity", "account", "list"];
 		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap().cmd, Cmd::Account(
-			AccountCmd::List(replace_home("$HOME/.parity/keys")),
+			AccountCmd::List(ListAccounts {
+				path: Directories::default().keys,
+				spec: SpecType::default(),
+			})
 		));
 	}
 
@@ -784,7 +797,8 @@ mod tests {
 		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap().cmd, Cmd::Account(AccountCmd::Import(ImportAccounts {
 			from: vec!["my_dir".into(), "another_dir".into()],
-			to: replace_home("$HOME/.parity/keys"),
+			to: Directories::default().keys,
+			spec: SpecType::default(),
 		})));
 	}
 
@@ -794,9 +808,10 @@ mod tests {
 		let conf = parse(&args);
 		assert_eq!(conf.into_command().unwrap().cmd, Cmd::ImportPresaleWallet(ImportWallet {
 			iterations: 10240,
-			path: replace_home("$HOME/.parity/keys"),
+			path: Directories::default().keys,
 			wallet_path: "my_wallet.json".into(),
 			password_file: Some("pwd".into()),
+			spec: SpecType::default(),
 		}));
 	}
 
@@ -895,7 +910,7 @@ mod tests {
 	fn test_command_signer_new_token() {
 		let args = vec!["parity", "signer", "new-token"];
 		let conf = parse(&args);
-		let expected = replace_home("$HOME/.parity/signer");
+		let expected = Directories::default().signer;
 		assert_eq!(conf.into_command().unwrap().cmd, Cmd::SignerToken(SignerConfiguration {
 			enabled: true,
 			signer_path: expected,
diff --git a/parity/dapps.rs b/parity/dapps.rs
index 4eed929ca..e54638ed2 100644
--- a/parity/dapps.rs
+++ b/parity/dapps.rs
@@ -20,6 +20,7 @@ use rpc_apis;
 use ethcore::client::Client;
 use ethsync::SyncProvider;
 use helpers::replace_home;
+use dir::default_data_path;
 
 #[derive(Debug, PartialEq, Clone)]
 pub struct Configuration {
@@ -34,6 +35,7 @@ pub struct Configuration {
 
 impl Default for Configuration {
 	fn default() -> Self {
+		let data_dir = default_data_path();
 		Configuration {
 			enabled: true,
 			interface: "127.0.0.1".into(),
@@ -41,7 +43,7 @@ impl Default for Configuration {
 			hosts: Some(Vec::new()),
 			user: None,
 			pass: None,
-			dapps_path: replace_home("$HOME/.parity/dapps"),
+			dapps_path: replace_home(&data_dir, "$DATA/dapps"),
 		}
 	}
 }
diff --git a/parity/dir.rs b/parity/dir.rs
index 0a49cd528..f9c2f30c9 100644
--- a/parity/dir.rs
+++ b/parity/dir.rs
@@ -19,6 +19,7 @@ use std::path::{PathBuf, Path};
 use util::{H64, H256};
 use util::journaldb::Algorithm;
 use helpers::replace_home;
+use app_dirs::{AppInfo, get_app_root, AppDataType};
 
 // this const is irrelevent cause we do have migrations now,
 // but we still use it for backwards compatibility
@@ -26,7 +27,7 @@ const LEGACY_CLIENT_DB_VER_STR: &'static str = "5.3";
 
 #[derive(Debug, PartialEq)]
 pub struct Directories {
-	pub db: String,
+	pub data: String,
 	pub keys: String,
 	pub signer: String,
 	pub dapps: String,
@@ -34,18 +35,19 @@ pub struct Directories {
 
 impl Default for Directories {
 	fn default() -> Self {
+		let data_dir = default_data_path();
 		Directories {
-			db: replace_home("$HOME/.parity"),
-			keys: replace_home("$HOME/.parity/keys"),
-			signer: replace_home("$HOME/.parity/signer"),
-			dapps: replace_home("$HOME/.parity/dapps"),
+			data: replace_home(&data_dir, "$DATA"),
+			keys: replace_home(&data_dir, "$DATA/keys"),
+			signer: replace_home(&data_dir, "$DATA/signer"),
+			dapps: replace_home(&data_dir, "$DATA/dapps"),
 		}
 	}
 }
 
 impl Directories {
 	pub fn create_dirs(&self, dapps_enabled: bool, signer_enabled: bool) -> Result<(), String> {
-		try!(fs::create_dir_all(&self.db).map_err(|e| e.to_string()));
+		try!(fs::create_dir_all(&self.data).map_err(|e| e.to_string()));
 		try!(fs::create_dir_all(&self.keys).map_err(|e| e.to_string()));
 		if signer_enabled {
 			try!(fs::create_dir_all(&self.signer).map_err(|e| e.to_string()));
@@ -57,20 +59,38 @@ impl Directories {
 	}
 
 	/// Database paths.
-	pub fn database(&self, genesis_hash: H256, fork_name: Option<String>) -> DatabaseDirectories {
+	pub fn database(&self, genesis_hash: H256, fork_name: Option<String>, spec_name: String) -> DatabaseDirectories {
 		DatabaseDirectories {
-			path: self.db.clone(),
+			path: self.data.clone(),
 			genesis_hash: genesis_hash,
 			fork_name: fork_name,
+			spec_name: spec_name,
 		}
 	}
 
 	/// Get the ipc sockets path
 	pub fn ipc_path(&self) -> PathBuf {
-		let mut dir = Path::new(&self.db).to_path_buf();
+		let mut dir = Path::new(&self.data).to_path_buf();
 		dir.push("ipc");
 		dir
 	}
+
+	// TODO: remove in 1.7
+	pub fn legacy_keys_path(&self, testnet: bool) -> PathBuf {
+		let mut dir = Path::new(&self.data).to_path_buf();
+		if testnet {
+			dir.push("testnet_keys");
+		} else {
+			dir.push("keys");
+		}
+		dir
+	}
+
+	pub fn keys_path(&self, spec_name: &str) -> PathBuf {
+		let mut dir = PathBuf::from(&self.keys);
+		dir.push(spec_name);
+		dir
+	}
 }
 
 #[derive(Debug, PartialEq)]
@@ -78,52 +98,103 @@ pub struct DatabaseDirectories {
 	pub path: String,
 	pub genesis_hash: H256,
 	pub fork_name: Option<String>,
+	pub spec_name: String,
 }
 
 impl DatabaseDirectories {
 	/// Base DB directory for the given fork.
-	pub fn fork_path(&self) -> PathBuf {
+	// TODO: remove in 1.7
+	pub fn legacy_fork_path(&self) -> PathBuf {
 		let mut dir = Path::new(&self.path).to_path_buf();
 		dir.push(format!("{:?}{}", H64::from(self.genesis_hash), self.fork_name.as_ref().map(|f| format!("-{}", f)).unwrap_or_default()));
 		dir
 	}
 
-	/// Get the root path for database
-	pub fn version_path(&self, pruning: Algorithm) -> PathBuf {
-		let mut dir = self.fork_path();
-		dir.push(format!("v{}-sec-{}", LEGACY_CLIENT_DB_VER_STR, pruning.as_internal_name_str()));
+	pub fn spec_root_path(&self) -> PathBuf {
+		let mut dir = Path::new(&self.path).to_path_buf();
+		dir.push("chains");
+		dir.push(&self.spec_name);
 		dir
 	}
 
-	/// Get the path for the databases given the genesis_hash and information on the databases.
 	pub fn client_path(&self, pruning: Algorithm) -> PathBuf {
-		let mut dir = self.version_path(pruning);
+		let mut dir = self.db_root_path();
+		dir.push(pruning.as_internal_name_str());
 		dir.push("db");
 		dir
 	}
 
+	pub fn db_root_path(&self) -> PathBuf {
+		let mut dir = self.spec_root_path();
+		dir.push("db");
+		dir.push(H64::from(self.genesis_hash).hex());
+		dir
+	}
+
+	pub fn db_path(&self, pruning: Algorithm) -> PathBuf {
+		let mut dir = self.db_root_path();
+		dir.push(pruning.as_internal_name_str());
+		dir
+	}
+
+	/// Get the root path for database
+	// TODO: remove in 1.7
+	pub fn legacy_version_path(&self, pruning: Algorithm) -> PathBuf {
+		let mut dir = self.legacy_fork_path();
+		dir.push(format!("v{}-sec-{}", LEGACY_CLIENT_DB_VER_STR, pruning.as_internal_name_str()));
+		dir
+	}
+
 	/// Get user defaults path
+	// TODO: remove in 1.7
+	pub fn legacy_user_defaults_path(&self) -> PathBuf {
+		let mut dir = self.legacy_fork_path();
+		dir.push("user_defaults");
+		dir
+	}
+
+	/// Get user defaults path
+	// TODO: remove in 1.7
+	pub fn legacy_snapshot_path(&self) -> PathBuf {
+		let mut dir = self.legacy_fork_path();
+		dir.push("snapshot");
+		dir
+	}
+
+	/// Get user defaults path
+	// TODO: remove in 1.7
+	pub fn legacy_network_path(&self) -> PathBuf {
+		let mut dir = self.legacy_fork_path();
+		dir.push("network");
+		dir
+	}
+
 	pub fn user_defaults_path(&self) -> PathBuf {
-		let mut dir = self.fork_path();
+		let mut dir = self.spec_root_path();
 		dir.push("user_defaults");
 		dir
 	}
 
 	/// Get the path for the snapshot directory given the genesis hash and fork name.
 	pub fn snapshot_path(&self) -> PathBuf {
-		let mut dir = self.fork_path();
+		let mut dir = self.db_root_path();
 		dir.push("snapshot");
 		dir
 	}
 
 	/// Get the path for the network directory.
 	pub fn network_path(&self) -> PathBuf {
-		let mut dir = self.fork_path();
+		let mut dir = self.spec_root_path();
 		dir.push("network");
 		dir
 	}
 }
 
+pub fn default_data_path() -> String {
+	let app_info = AppInfo { name: "parity", author: "parity" };
+	get_app_root(AppDataType::UserData, &app_info).map(|p| p.to_string_lossy().into_owned()).unwrap_or_else(|_| "$HOME/.parity".to_owned())
+}
+
 #[cfg(test)]
 mod tests {
 	use super::Directories;
@@ -131,11 +202,12 @@ mod tests {
 
 	#[test]
 	fn test_default_directories() {
+		let data_dir = super::default_data_path();
 		let expected = Directories {
-			db: replace_home("$HOME/.parity"),
-			keys: replace_home("$HOME/.parity/keys"),
-			signer: replace_home("$HOME/.parity/signer"),
-			dapps: replace_home("$HOME/.parity/dapps"),
+			data: replace_home(&data_dir, "$DATA"),
+			keys: replace_home(&data_dir, "$DATA/keys"),
+			signer: replace_home(&data_dir, "$DATA/signer"),
+			dapps: replace_home(&data_dir, "$DATA/dapps"),
 		};
 		assert_eq!(expected, Directories::default());
 	}
diff --git a/parity/helpers.rs b/parity/helpers.rs
index d1b1e4027..f359d617f 100644
--- a/parity/helpers.rs
+++ b/parity/helpers.rs
@@ -24,7 +24,7 @@ use ethcore::client::{Mode, BlockId, VMType, DatabaseCompactionProfile, ClientCo
 use ethcore::miner::{PendingSet, GasLimit, PrioritizationStrategy};
 use cache::CacheConfig;
 use dir::DatabaseDirectories;
-use upgrade::upgrade;
+use upgrade::{upgrade, upgrade_data_paths};
 use migration::migrate;
 use ethsync::is_valid_node_url;
 
@@ -132,9 +132,10 @@ pub fn to_price(s: &str) -> Result<f32, String> {
 }
 
 /// Replaces `$HOME` str with home directory path.
-pub fn replace_home(arg: &str) -> String {
+pub fn replace_home(base: &str, arg: &str) -> String {
 	// the $HOME directory on mac os should be `~/Library` or `~/Library/Application Support`
 	let r = arg.replace("$HOME", env::home_dir().unwrap().to_str().unwrap());
+	let r = r.replace("$DATA", base	);
 	r.replace("/", &::std::path::MAIN_SEPARATOR.to_string()	)
 }
 
@@ -159,13 +160,13 @@ pub fn geth_ipc_path(testnet: bool) -> String {
 }
 
 /// Formats and returns parity ipc path.
-pub fn parity_ipc_path(s: &str) -> String {
+pub fn parity_ipc_path(base: &str, s: &str) -> String {
 	// Windows path should not be hardcoded here.
 	if cfg!(windows) {
 		return r"\\.\pipe\parity.jsonrpc".to_owned();
 	}
 
-	replace_home(s)
+	replace_home(base, s)
 }
 
 /// Validates and formats bootnodes option.
@@ -187,7 +188,7 @@ pub fn to_bootnodes(bootnodes: &Option<String>) -> Result<Vec<String>, String> {
 pub fn default_network_config() -> ::ethsync::NetworkConfiguration {
 	use ethsync::{NetworkConfiguration, AllowIP};
 	NetworkConfiguration {
-		config_path: Some(replace_home("$HOME/.parity/network")),
+		config_path: Some(replace_home(&::dir::default_data_path(), "$DATA/network")),
 		net_config_path: None,
 		listen_address: Some("0.0.0.0:30303".into()),
 		public_address: None,
@@ -261,6 +262,8 @@ pub fn execute_upgrades(
 	compaction_profile: CompactionProfile
 ) -> Result<(), String> {
 
+	upgrade_data_paths(dirs, pruning);
+
 	match upgrade(Some(&dirs.path)) {
 		Ok(upgrades_applied) if upgrades_applied > 0 => {
 			debug!("Executed {} upgrade scripts - ok", upgrades_applied);
@@ -271,7 +274,7 @@ pub fn execute_upgrades(
 		_ => {},
 	}
 
-	let client_path = dirs.version_path(pruning);
+	let client_path = dirs.db_path(pruning);
 	migrate(&client_path, pruning, compaction_profile).map_err(|e| format!("{}", e))
 }
 
diff --git a/parity/main.rs b/parity/main.rs
index 8c1f88e1e..3db6847a1 100644
--- a/parity/main.rs
+++ b/parity/main.rs
@@ -54,6 +54,7 @@ extern crate ansi_term;
 extern crate regex;
 extern crate isatty;
 extern crate toml;
+extern crate app_dirs;
 
 #[macro_use]
 extern crate ethcore_util as util;
diff --git a/parity/params.rs b/parity/params.rs
index aaaa12085..9f549acee 100644
--- a/parity/params.rs
+++ b/parity/params.rs
@@ -76,6 +76,14 @@ impl SpecType {
 			}
 		}
 	}
+
+	pub fn legacy_fork_name(&self) -> Option<String> {
+		match *self {
+			SpecType::Classic => Some("classic".to_owned()),
+			SpecType::Expanse => Some("expanse".to_owned()),
+			_ => None,
+		}
+	}
 }
 
 #[derive(Debug, PartialEq)]
diff --git a/parity/presale.rs b/parity/presale.rs
index 7754e7e18..d8e19a96a 100644
--- a/parity/presale.rs
+++ b/parity/presale.rs
@@ -18,11 +18,13 @@ use ethcore::ethstore::{PresaleWallet, EthStore};
 use ethcore::ethstore::dir::DiskDirectory;
 use ethcore::account_provider::AccountProvider;
 use helpers::{password_prompt, password_from_file};
+use params::SpecType;
 
 #[derive(Debug, PartialEq)]
 pub struct ImportWallet {
 	pub iterations: u32,
 	pub path: String,
+	pub spec: SpecType,
 	pub wallet_path: String,
 	pub password_file: Option<String>,
 }
diff --git a/parity/rpc.rs b/parity/rpc.rs
index 2551b0736..b0668bf57 100644
--- a/parity/rpc.rs
+++ b/parity/rpc.rs
@@ -23,6 +23,7 @@ use ethcore_rpc::{RpcServerError, RpcServer as Server, IpcServerError};
 use rpc_apis;
 use rpc_apis::ApiSet;
 use helpers::parity_ipc_path;
+use dir::default_data_path;
 
 pub use ethcore_rpc::{IpcServer, Server as HttpServer};
 
@@ -58,9 +59,10 @@ pub struct IpcConfiguration {
 
 impl Default for IpcConfiguration {
 	fn default() -> Self {
+		let data_dir = default_data_path();
 		IpcConfiguration {
 			enabled: true,
-			socket_addr: parity_ipc_path("$HOME/.parity/jsonrpc.ipc"),
+			socket_addr: parity_ipc_path(&data_dir, "$DATA/jsonrpc.ipc"),
 			apis: ApiSet::IpcContext,
 		}
 	}
diff --git a/parity/run.rs b/parity/run.rs
index 346567842..140c2050c 100644
--- a/parity/run.rs
+++ b/parity/run.rs
@@ -41,6 +41,7 @@ use params::{
 	tracing_switch_to_bool, fatdb_switch_to_bool, mode_switch_to_bool
 };
 use helpers::{to_client_config, execute_upgrades, passwords_from_files};
+use upgrade::upgrade_key_location;
 use dir::Directories;
 use cache::CacheConfig;
 use user_defaults::UserDefaults;
@@ -129,9 +130,6 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 	// increase max number of open files
 	raise_fd_limit();
 
-	// create dirs used by parity
-	try!(cmd.dirs.create_dirs(cmd.dapps_conf.enabled, cmd.signer_conf.enabled));
-
 	// load spec
 	let spec = try!(cmd.spec.spec());
 
@@ -139,7 +137,7 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 	let genesis_hash = spec.genesis_header().hash();
 
 	// database paths
-	let db_dirs = cmd.dirs.database(genesis_hash, spec.fork_name.clone());
+	let db_dirs = cmd.dirs.database(genesis_hash, cmd.spec.legacy_fork_name(), spec.data_dir.clone());
 
 	// user defaults path
 	let user_defaults_path = db_dirs.user_defaults_path();
@@ -166,7 +164,10 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 	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, cmd.compaction.compaction_profile(db_dirs.db_root_path().as_path())));
+
+	// create dirs used by parity
+	try!(cmd.dirs.create_dirs(cmd.dapps_conf.enabled, cmd.signer_conf.enabled));
 
 	// run in daemon mode
 	if let Some(pid_file) = cmd.daemon {
@@ -217,7 +218,7 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 	let passwords = try!(passwords_from_files(&cmd.acc_conf.password_files));
 
 	// prepare account provider
-	let account_provider = Arc::new(try!(prepare_account_provider(&cmd.dirs, cmd.acc_conf, &passwords)));
+	let account_provider = Arc::new(try!(prepare_account_provider(&cmd.dirs, &spec.data_dir, cmd.acc_conf, &passwords)));
 
 	// let the Engine access the accounts
 	spec.engine.register_account_provider(account_provider.clone());
@@ -449,11 +450,13 @@ fn daemonize(_pid_file: String) -> Result<(), String> {
 	Err("daemon is no supported on windows".into())
 }
 
-fn prepare_account_provider(dirs: &Directories, cfg: AccountsConfig, passwords: &[String]) -> Result<AccountProvider, String> {
+fn prepare_account_provider(dirs: &Directories, data_dir: &str, cfg: AccountsConfig, passwords: &[String]) -> Result<AccountProvider, String> {
 	use ethcore::ethstore::EthStore;
 	use ethcore::ethstore::dir::DiskDirectory;
 
-	let dir = Box::new(try!(DiskDirectory::create(dirs.keys.clone()).map_err(|e| format!("Could not open keys directory: {}", e))));
+	let path = dirs.keys_path(data_dir);
+	upgrade_key_location(&dirs.legacy_keys_path(cfg.testnet), &path);
+	let dir = Box::new(try!(DiskDirectory::create(&path).map_err(|e| format!("Could not open keys directory: {}", e))));
 	let account_service = AccountProvider::new(Box::new(
 		try!(EthStore::open_with_iterations(dir, cfg.iterations).map_err(|e| format!("Could not open keys directory: {}", e)))
 	));
diff --git a/parity/signer.rs b/parity/signer.rs
index d247453f1..4d282888e 100644
--- a/parity/signer.rs
+++ b/parity/signer.rs
@@ -23,6 +23,7 @@ use util::path::restrict_permissions_owner;
 use rpc_apis;
 use ethcore_signer as signer;
 use helpers::replace_home;
+use dir::default_data_path;
 pub use ethcore_signer::Server as SignerServer;
 
 const CODES_FILENAME: &'static str = "authcodes";
@@ -38,11 +39,12 @@ pub struct Configuration {
 
 impl Default for Configuration {
 	fn default() -> Self {
+		let data_dir = default_data_path();
 		Configuration {
 			enabled: true,
 			port: 8180,
 			interface: "127.0.0.1".into(),
-			signer_path: replace_home("$HOME/.parity/signer"),
+			signer_path: replace_home(&data_dir, "$DATA/signer"),
 			skip_origin_validation: false,
 		}
 	}
diff --git a/parity/snapshot.rs b/parity/snapshot.rs
index 2963e9b84..d71ffe924 100644
--- a/parity/snapshot.rs
+++ b/parity/snapshot.rs
@@ -143,7 +143,7 @@ impl SnapshotCommand {
 		let genesis_hash = spec.genesis_header().hash();
 
 		// database paths
-		let db_dirs = self.dirs.database(genesis_hash, spec.fork_name.clone());
+		let db_dirs = self.dirs.database(genesis_hash, None, spec.data_dir.clone());
 
 		// user defaults path
 		let user_defaults_path = db_dirs.user_defaults_path();
@@ -167,7 +167,7 @@ impl SnapshotCommand {
 		let snapshot_path = db_dirs.snapshot_path();
 
 		// execute upgrades
-		try!(execute_upgrades(&db_dirs, algorithm, self.compaction.compaction_profile(db_dirs.fork_path().as_path())));
+		try!(execute_upgrades(&db_dirs, algorithm, self.compaction.compaction_profile(db_dirs.db_root_path().as_path())));
 
 		// prepare client config
 		let client_config = to_client_config(&self.cache_config, Mode::Active, tracing, fat_db, self.compaction, self.wal, VMType::default(), "".into(), algorithm, self.pruning_history, true);
diff --git a/parity/upgrade.rs b/parity/upgrade.rs
index 401f6a722..5c49cb997 100644
--- a/parity/upgrade.rs
+++ b/parity/upgrade.rs
@@ -18,10 +18,14 @@
 
 use semver::Version;
 use std::collections::*;
-use std::fs::{File, create_dir_all};
+use std::fs::{self, File, create_dir_all};
 use std::env;
+use std::io;
 use std::io::{Read, Write};
-use std::path::PathBuf;
+use std::path::{PathBuf, Path};
+use dir::{DatabaseDirectories, default_data_path};
+use helpers::replace_home;
+use util::journaldb::Algorithm;
 
 #[cfg_attr(feature="dev", allow(enum_variant_names))]
 #[derive(Debug)]
@@ -126,3 +130,84 @@ pub fn upgrade(db_path: Option<&str>) -> Result<usize, Error> {
 		upgrade_from_version(ver)
 	})
 }
+
+fn file_exists(path: &Path) -> bool {
+	match fs::metadata(&path) {
+		Err(ref e) if e.kind() == io::ErrorKind::NotFound => false,
+		_ => true,
+	}
+}
+
+pub fn upgrade_key_location(from: &PathBuf, to: &PathBuf) {
+	let mut parent = to.clone();
+	parent.pop();
+	match fs::create_dir_all(&parent).and_then(|()| fs::read_dir(from)) {
+		Ok(entries) => {
+			let files: Vec<_> = entries.filter_map(|f| f.ok().and_then(|f| if f.file_type().ok().map_or(false, |f| f.is_file()) { f.file_name().to_str().map(|s| s.to_owned()) } else { None })).collect();
+			let mut num: usize = 0;
+			for name in files {
+				let mut from = from.clone();
+				from.push(&name);
+				let mut to = to.clone();
+				to.push(&name);
+				if !file_exists(&to) {
+					if let Err(e) = fs::rename(&from, &to) {
+						debug!("Error upgrading key {:?}: {:?}", from, e);
+					} else {
+						num += 1;
+					}
+				} else {
+					debug!("Skipped upgrading key {:?}", from);
+				}
+			}
+			if num > 0 {
+				info!("Moved {} keys from {} to {}", num, from.to_string_lossy(), to.to_string_lossy());
+			}
+		},
+		Err(e) => {
+			warn!("Error moving keys from {:?} to {:?}: {:?}", from, to, e);
+		}
+	}
+}
+
+fn upgrade_dir_location(source: &PathBuf, dest: &PathBuf) {
+	if file_exists(&source) {
+		if !file_exists(&dest) {
+			let mut parent = dest.clone();
+			parent.pop();
+			if let Err(e) = fs::create_dir_all(&parent).and_then(|()| fs::rename(&source, &dest)) {
+				debug!("Skipped path {:?} -> {:?} :{:?}", source, dest, e);
+			} else {
+				info!("Moved {} to {}", source.to_string_lossy(), dest.to_string_lossy());
+			}
+		} else {
+			debug!("Skipped upgrading directory {:?}, Destination already exists at {:?}", source, dest);
+		}
+	}
+}
+
+fn upgrade_user_defaults(dirs: &DatabaseDirectories) {
+	let source = dirs.legacy_user_defaults_path();
+	let dest = dirs.user_defaults_path();
+	if file_exists(&source) {
+		if !file_exists(&dest) {
+			if let Err(e) = fs::rename(&source, &dest) {
+				debug!("Skipped upgrading user defaults {:?}:{:?}", dest, e);
+			}
+		} else {
+			debug!("Skipped upgrading user defaults {:?}, File exists at {:?}", source, dest);
+		}
+	}
+}
+
+pub fn upgrade_data_paths(dirs: &DatabaseDirectories, pruning: Algorithm) {
+	let legacy_root_path = replace_home("", "$HOME/.parity");
+	let default_path = default_data_path();
+	if legacy_root_path != dirs.path && dirs.path == default_path {
+		upgrade_dir_location(&PathBuf::from(legacy_root_path), &PathBuf::from(&dirs.path));
+	}
+	upgrade_dir_location(&dirs.legacy_version_path(pruning), &dirs.db_path(pruning));
+	upgrade_dir_location(&dirs.legacy_snapshot_path(), &dirs.snapshot_path());
+	upgrade_dir_location(&dirs.legacy_network_path(), &dirs.network_path());
+	upgrade_user_defaults(&dirs);
+}
diff --git a/rpc/src/v1/impls/traces.rs b/rpc/src/v1/impls/traces.rs
index 6b37e40cc..5f42c0cf3 100644
--- a/rpc/src/v1/impls/traces.rs
+++ b/rpc/src/v1/impls/traces.rs
@@ -17,14 +17,14 @@
 //! Traces api implementation.
 
 use std::sync::{Weak, Arc};
-use jsonrpc_core::*;
-use serde;
 
 use rlp::{UntrustedRlp, View};
 use ethcore::client::{BlockChainClient, CallAnalytics, TransactionId, TraceId};
 use ethcore::miner::MinerService;
 use ethcore::transaction::{Transaction as EthTransaction, SignedTransaction, Action};
 
+use jsonrpc_core::Error;
+use jsonrpc_macros::Trailing;
 use v1::traits::Traces;
 use v1::helpers::{errors, CallRequest as CRequest};
 use v1::types::{TraceFilter, LocalizedTrace, BlockNumber, Index, CallRequest, Bytes, TraceResults, H256};
@@ -37,22 +37,6 @@ fn to_call_analytics(flags: Vec<String>) -> CallAnalytics {
 	}
 }
 
-/// Returns number of different parameters in given `Params` object.
-fn params_len(params: &Params) -> usize {
-	match params {
-		&Params::Array(ref vec) => vec.len(),
-		_ => 0,
-	}
-}
-
-/// Deserialize request parameters with optional third parameter `BlockNumber` defaulting to `BlockNumber::Latest`.
-fn from_params_default_third<F1, F2>(params: Params) -> Result<(F1, F2, BlockNumber, ), Error> where F1: serde::de::Deserialize, F2: serde::de::Deserialize {
-	match params_len(&params) {
-		2 => from_params::<(F1, F2, )>(params).map(|(f1, f2)| (f1, f2, BlockNumber::Latest)),
-		_ => from_params::<(F1, F2, BlockNumber)>(params)
-	}
-}
-
 /// Traces api implementation.
 pub struct TracesClient<C, M> where C: BlockChainClient, M: MinerService {
 	client: Weak<C>,
@@ -91,90 +75,77 @@ impl<C, M> TracesClient<C, M> where C: BlockChainClient, M: MinerService {
 }
 
 impl<C, M> Traces for TracesClient<C, M> where C: BlockChainClient + 'static, M: MinerService + 'static {
-	fn filter(&self, params: Params) -> Result<Value, Error> {
+	fn filter(&self, filter: TraceFilter) -> Result<Vec<LocalizedTrace>, Error> {
 		try!(self.active());
-		from_params::<(TraceFilter,)>(params)
-			.and_then(|(filter, )| {
-				let client = take_weak!(self.client);
-				let traces = client.filter_traces(filter.into());
-				let traces = traces.map_or_else(Vec::new, |traces| traces.into_iter().map(LocalizedTrace::from).collect());
-				Ok(to_value(&traces))
-			})
+
+		let client = take_weak!(self.client);
+		let traces = client.filter_traces(filter.into());
+		let traces = traces.map_or_else(Vec::new, |traces| traces.into_iter().map(LocalizedTrace::from).collect());
+		Ok(traces)
 	}
 
-	fn block_traces(&self, params: Params) -> Result<Value, Error> {
+	fn block_traces(&self, block_number: BlockNumber) -> Result<Vec<LocalizedTrace>, Error> {
 		try!(self.active());
-		from_params::<(BlockNumber,)>(params)
-			.and_then(|(block_number,)| {
-				let client = take_weak!(self.client);
-				let traces = client.block_traces(block_number.into());
-				let traces = traces.map_or_else(Vec::new, |traces| traces.into_iter().map(LocalizedTrace::from).collect());
-				Ok(to_value(&traces))
-			})
+		let client = take_weak!(self.client);
+		let traces = client.block_traces(block_number.into());
+		let traces = traces.map_or_else(Vec::new, |traces| traces.into_iter().map(LocalizedTrace::from).collect());
+		Ok(traces)
 	}
 
-	fn transaction_traces(&self, params: Params) -> Result<Value, Error> {
+	fn transaction_traces(&self, transaction_hash: H256) -> Result<Vec<LocalizedTrace>, Error> {
 		try!(self.active());
-		from_params::<(H256,)>(params)
-			.and_then(|(transaction_hash,)| {
-				let client = take_weak!(self.client);
-				let traces = client.transaction_traces(TransactionId::Hash(transaction_hash.into()));
-				let traces = traces.map_or_else(Vec::new, |traces| traces.into_iter().map(LocalizedTrace::from).collect());
-				Ok(to_value(&traces))
-			})
+
+		let client = take_weak!(self.client);
+		let traces = client.transaction_traces(TransactionId::Hash(transaction_hash.into()));
+		let traces = traces.map_or_else(Vec::new, |traces| traces.into_iter().map(LocalizedTrace::from).collect());
+		Ok(traces)
 	}
 
-	fn trace(&self, params: Params) -> Result<Value, Error> {
+	fn trace(&self, transaction_hash: H256, address: Vec<Index>) -> Result<Option<LocalizedTrace>, Error> {
 		try!(self.active());
-		from_params::<(H256, Vec<Index>)>(params)
-			.and_then(|(transaction_hash, address)| {
-				let client = take_weak!(self.client);
-				let id = TraceId {
-					transaction: TransactionId::Hash(transaction_hash.into()),
-					address: address.into_iter().map(|i| i.value()).collect()
-				};
-				let trace = client.trace(id);
-				let trace = trace.map(LocalizedTrace::from);
-				Ok(to_value(&trace))
-			})
+		let client = take_weak!(self.client);
+		let id = TraceId {
+			transaction: TransactionId::Hash(transaction_hash.into()),
+			address: address.into_iter().map(|i| i.value()).collect()
+		};
+		let trace = client.trace(id);
+		let trace = trace.map(LocalizedTrace::from);
+
+		Ok(trace)
 	}
 
-	fn call(&self, params: Params) -> Result<Value, Error> {
+	fn call(&self, request: CallRequest, flags: Vec<String>, block: Trailing<BlockNumber>) -> Result<Option<TraceResults>, Error> {
 		try!(self.active());
-		from_params_default_third(params)
-			.and_then(|(request, flags, block)| {
-				let request = CallRequest::into(request);
-				let signed = try!(self.sign_call(request));
-				match take_weak!(self.client).call(&signed, block.into(), to_call_analytics(flags)) {
-					Ok(e) => Ok(to_value(&TraceResults::from(e))),
-					_ => Ok(Value::Null),
-				}
-			})
+		let block = block.0;
+
+		let request = CallRequest::into(request);
+		let signed = try!(self.sign_call(request));
+		Ok(match take_weak!(self.client).call(&signed, block.into(), to_call_analytics(flags)) {
+			Ok(e) => Some(TraceResults::from(e)),
+			_ => None,
+		})
 	}
 
-	fn raw_transaction(&self, params: Params) -> Result<Value, Error> {
+	fn raw_transaction(&self, raw_transaction: Bytes, flags: Vec<String>, block: Trailing<BlockNumber>) -> Result<Option<TraceResults>, Error> {
 		try!(self.active());
-		from_params_default_third(params)
-			.and_then(|(raw_transaction, flags, block)| {
-				let raw_transaction = Bytes::to_vec(raw_transaction);
-				match UntrustedRlp::new(&raw_transaction).as_val() {
-					Ok(signed) => match take_weak!(self.client).call(&signed, block.into(), to_call_analytics(flags)) {
-						Ok(e) => Ok(to_value(&TraceResults::from(e))),
-						_ => Ok(Value::Null),
-					},
-					Err(e) => Err(errors::invalid_params("Transaction is not valid RLP", e)),
-				}
-			})
+		let block = block.0;
+
+		let raw_transaction = Bytes::to_vec(raw_transaction);
+		match UntrustedRlp::new(&raw_transaction).as_val() {
+			Ok(signed) => Ok(match take_weak!(self.client).call(&signed, block.into(), to_call_analytics(flags)) {
+				Ok(e) => Some(TraceResults::from(e)),
+				_ => None,
+			}),
+			Err(e) => Err(errors::invalid_params("Transaction is not valid RLP", e)),
+		}
 	}
 
-	fn replay_transaction(&self, params: Params) -> Result<Value, Error> {
+	fn replay_transaction(&self, transaction_hash: H256, flags: Vec<String>) -> Result<Option<TraceResults>, Error> {
 		try!(self.active());
-		from_params::<(H256, _)>(params)
-			.and_then(|(transaction_hash, flags)| {
-				match take_weak!(self.client).replay(TransactionId::Hash(transaction_hash.into()), to_call_analytics(flags)) {
-					Ok(e) => Ok(to_value(&TraceResults::from(e))),
-					_ => Ok(Value::Null),
-				}
-			})
+
+		Ok(match take_weak!(self.client).replay(TransactionId::Hash(transaction_hash.into()), to_call_analytics(flags)) {
+			Ok(e) => Some(TraceResults::from(e)),
+			_ => None,
+		})
 	}
 }
diff --git a/rpc/src/v1/tests/mocked/mod.rs b/rpc/src/v1/tests/mocked/mod.rs
index 0ba0fc95c..0dbaa38f6 100644
--- a/rpc/src/v1/tests/mocked/mod.rs
+++ b/rpc/src/v1/tests/mocked/mod.rs
@@ -18,13 +18,14 @@
 //! method calls properly.
 
 mod eth;
+mod manage_network;
 mod net;
-mod web3;
-mod personal;
 mod parity;
 mod parity_accounts;
 mod parity_set;
+mod personal;
 mod rpc;
 mod signer;
 mod signing;
-mod manage_network;
+mod traces;
+mod web3;
diff --git a/rpc/src/v1/tests/mocked/traces.rs b/rpc/src/v1/tests/mocked/traces.rs
new file mode 100644
index 000000000..f9a9baa00
--- /dev/null
+++ b/rpc/src/v1/tests/mocked/traces.rs
@@ -0,0 +1,145 @@
+// Copyright 2015, 2016 Parity Technologies (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+use std::sync::Arc;
+
+use ethcore::executed::{CallType, Executed};
+use ethcore::trace::trace::{Action, Res, Call};
+use ethcore::trace::LocalizedTrace;
+use ethcore::client::{TestBlockChainClient};
+
+use jsonrpc_core::{IoHandler, GenericIoHandler};
+use v1::tests::helpers::{TestMinerService};
+use v1::{Traces, TracesClient};
+
+struct Tester {
+	_client: Arc<TestBlockChainClient>,
+	_miner: Arc<TestMinerService>,
+	io: IoHandler,
+}
+
+fn io() -> Tester {
+	let client = Arc::new(TestBlockChainClient::new());
+	*client.traces.write() = Some(vec![LocalizedTrace {
+		action: Action::Call(Call {
+			from: 0xf.into(),
+			to: 0x10.into(),
+			value: 0x1.into(),
+			gas: 0x100.into(),
+			input: vec![1, 2, 3],
+			call_type: CallType::Call,
+		}),
+		result: Res::None,
+		subtraces: 0,
+		trace_address: vec![0],
+		transaction_number: 0,
+		transaction_hash: 5.into(),
+		block_number: 10,
+		block_hash: 10.into(),
+	}]);
+	*client.execution_result.write() = Some(Ok(Executed {
+		gas: 20_000.into(),
+		gas_used: 10_000.into(),
+		refunded: 0.into(),
+		cumulative_gas_used: 10_000.into(),
+		logs: vec![],
+		contracts_created: vec![],
+		output: vec![1, 2, 3],
+		trace: vec![],
+		vm_trace: None,
+		state_diff: None,
+	}));
+	let miner = Arc::new(TestMinerService::default());
+	let traces = TracesClient::new(&client, &miner);
+	let io = IoHandler::new();
+	io.add_delegate(traces.to_delegate());
+
+	Tester {
+		_client: client,
+		_miner: miner,
+		io: io,
+	}
+}
+
+#[test]
+fn rpc_trace_filter() {
+	let tester = io();
+
+	let request = r#"{"jsonrpc":"2.0","method":"trace_filter","params": [{}],"id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":[{"action":{"callType":"call","from":"0x000000000000000000000000000000000000000f","gas":"0x100","input":"0x010203","to":"0x0000000000000000000000000000000000000010","value":"0x1"},"blockHash":"0x000000000000000000000000000000000000000000000000000000000000000a","blockNumber":10,"result":null,"subtraces":0,"traceAddress":[0],"transactionHash":"0x0000000000000000000000000000000000000000000000000000000000000005","transactionPosition":0,"type":"call"}],"id":1}"#;
+
+	assert_eq!(tester.io.handle_request_sync(request), Some(response.to_owned()));
+}
+
+#[test]
+fn rpc_trace_block() {
+	let tester = io();
+
+	let request = r#"{"jsonrpc":"2.0","method":"trace_block","params": ["0x10"],"id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":[{"action":{"callType":"call","from":"0x000000000000000000000000000000000000000f","gas":"0x100","input":"0x010203","to":"0x0000000000000000000000000000000000000010","value":"0x1"},"blockHash":"0x000000000000000000000000000000000000000000000000000000000000000a","blockNumber":10,"result":null,"subtraces":0,"traceAddress":[0],"transactionHash":"0x0000000000000000000000000000000000000000000000000000000000000005","transactionPosition":0,"type":"call"}],"id":1}"#;
+
+	assert_eq!(tester.io.handle_request_sync(request), Some(response.to_owned()));
+}
+
+#[test]
+fn rpc_trace_transaction() {
+	let tester = io();
+
+	let request = r#"{"jsonrpc":"2.0","method":"trace_transaction","params":["0x0000000000000000000000000000000000000000000000000000000000000005"],"id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":[{"action":{"callType":"call","from":"0x000000000000000000000000000000000000000f","gas":"0x100","input":"0x010203","to":"0x0000000000000000000000000000000000000010","value":"0x1"},"blockHash":"0x000000000000000000000000000000000000000000000000000000000000000a","blockNumber":10,"result":null,"subtraces":0,"traceAddress":[0],"transactionHash":"0x0000000000000000000000000000000000000000000000000000000000000005","transactionPosition":0,"type":"call"}],"id":1}"#;
+
+	assert_eq!(tester.io.handle_request_sync(request), Some(response.to_owned()));
+}
+
+#[test]
+fn rpc_trace_get() {
+	let tester = io();
+
+	let request = r#"{"jsonrpc":"2.0","method":"trace_get","params":["0x0000000000000000000000000000000000000000000000000000000000000005", ["0","0","0"]],"id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":{"action":{"callType":"call","from":"0x000000000000000000000000000000000000000f","gas":"0x100","input":"0x010203","to":"0x0000000000000000000000000000000000000010","value":"0x1"},"blockHash":"0x000000000000000000000000000000000000000000000000000000000000000a","blockNumber":10,"result":null,"subtraces":0,"traceAddress":[0],"transactionHash":"0x0000000000000000000000000000000000000000000000000000000000000005","transactionPosition":0,"type":"call"},"id":1}"#;
+
+	assert_eq!(tester.io.handle_request_sync(request), Some(response.to_owned()));
+}
+
+#[test]
+fn rpc_trace_call() {
+	let tester = io();
+
+	let request = r#"{"jsonrpc":"2.0","method":"trace_call","params":[{}, ["stateDiff", "vmTrace", "trace"]],"id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":{"output":"0x010203","stateDiff":null,"trace":[],"vmTrace":null},"id":1}"#;
+
+	assert_eq!(tester.io.handle_request_sync(request), Some(response.to_owned()));
+}
+
+#[test]
+fn rpc_trace_raw_transaction() {
+	let tester = io();
+
+	let request = r#"{"jsonrpc":"2.0","method":"trace_rawTransaction","params":["0xf869018609184e72a0008276c094d46e8dd67c5d32be8058bb8eb970870f07244567849184e72a801ba0617f39c1a107b63302449c476d96a6cb17a5842fc98ff0c5bcf4d5c4d8166b95a009fdb6097c6196b9bbafc3a59f02f38d91baeef23d0c60a8e4f23c7714cea3a9", ["stateDiff", "vmTrace", "trace"]],"id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":{"output":"0x010203","stateDiff":null,"trace":[],"vmTrace":null},"id":1}"#;
+
+	assert_eq!(tester.io.handle_request_sync(request), Some(response.to_owned()));
+}
+
+#[test]
+fn rpc_trace_replay_transaction() {
+	let tester = io();
+
+	let request = r#"{"jsonrpc":"2.0","method":"trace_replayTransaction","params":["0x0000000000000000000000000000000000000000000000000000000000000005", ["trace", "stateDiff", "vmTrace"]],"id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":{"output":"0x010203","stateDiff":null,"trace":[],"vmTrace":null},"id":1}"#;
+
+	assert_eq!(tester.io.handle_request_sync(request), Some(response.to_owned()));
+}
diff --git a/rpc/src/v1/traits/traces.rs b/rpc/src/v1/traits/traces.rs
index 36561216f..1d5fef5ec 100644
--- a/rpc/src/v1/traits/traces.rs
+++ b/rpc/src/v1/traits/traces.rs
@@ -16,43 +16,39 @@
 
 //! Traces specific rpc interface.
 
-use std::sync::Arc;
-use jsonrpc_core::{Params, Value, Error, IoDelegate};
+use jsonrpc_core::Error;
+use jsonrpc_macros::Trailing;
+use v1::types::{TraceFilter, LocalizedTrace, BlockNumber, Index, CallRequest, Bytes, TraceResults, H256};
 
-/// Traces specific rpc interface.
-pub trait Traces: Sized + Send + Sync + 'static {
-	/// Returns traces matching given filter.
-	fn filter(&self, _: Params) -> Result<Value, Error>;
+build_rpc_trait! {
+	/// Traces specific rpc interface.
+	pub trait Traces {
+		/// Returns traces matching given filter.
+		#[rpc(name = "trace_filter")]
+		fn filter(&self, TraceFilter) -> Result<Vec<LocalizedTrace>, Error>;
 
-	/// Returns transaction trace at given index.
-	fn trace(&self, _: Params) -> Result<Value, Error>;
+		/// Returns transaction trace at given index.
+		#[rpc(name = "trace_get")]
+		fn trace(&self, H256, Vec<Index>) -> Result<Option<LocalizedTrace>, Error>;
 
-	/// Returns all traces of given transaction.
-	fn transaction_traces(&self, _: Params) -> Result<Value, Error>;
+		/// Returns all traces of given transaction.
+		#[rpc(name = "trace_transaction")]
+		fn transaction_traces(&self, H256) -> Result<Vec<LocalizedTrace>, Error>;
 
-	/// Returns all traces produced at given block.
-	fn block_traces(&self, _: Params) -> Result<Value, Error>;
+		/// Returns all traces produced at given block.
+		#[rpc(name = "trace_block")]
+		fn block_traces(&self, BlockNumber) -> Result<Vec<LocalizedTrace>, Error>;
 
-	/// Executes the given call and returns a number of possible traces for it.
-	fn call(&self, _: Params) -> Result<Value, Error>;
+		/// Executes the given call and returns a number of possible traces for it.
+		#[rpc(name = "trace_call")]
+		fn call(&self, CallRequest, Vec<String>, Trailing<BlockNumber>) -> Result<Option<TraceResults>, Error>;
 
-	/// Executes the given raw transaction and returns a number of possible traces for it.
-	fn raw_transaction(&self, _: Params) -> Result<Value, Error>;
+		/// Executes the given raw transaction and returns a number of possible traces for it.
+		#[rpc(name = "trace_rawTransaction")]
+		fn raw_transaction(&self, Bytes, Vec<String>, Trailing<BlockNumber>) -> Result<Option<TraceResults>, Error>;
 
-	/// Executes the transaction with the given hash and returns a number of possible traces for it.
-	fn replay_transaction(&self, _: Params) -> Result<Value, Error>;
-
-	/// Should be used to convert object to io delegate.
-	fn to_delegate(self) -> IoDelegate<Self> {
-		let mut delegate = IoDelegate::new(Arc::new(self));
-		delegate.add_method("trace_filter", Traces::filter);
-		delegate.add_method("trace_get", Traces::trace);
-		delegate.add_method("trace_transaction", Traces::transaction_traces);
-		delegate.add_method("trace_block", Traces::block_traces);
-		delegate.add_method("trace_call", Traces::call);
-		delegate.add_method("trace_rawTransaction", Traces::raw_transaction);
-		delegate.add_method("trace_replayTransaction", Traces::replay_transaction);
-
-		delegate
+		/// Executes the transaction with the given hash and returns a number of possible traces for it.
+		#[rpc(name = "trace_replayTransaction")]
+		fn replay_transaction(&self, H256, Vec<String>) -> Result<Option<TraceResults>, Error>;
 	}
 }