Backports for stable 2.1.7 (#9975 )

* version: bump stable to 2.1.7 * Adjust requests costs for light client (#9925) * PIP Table Cost relative to average peers instead of max peers * Add tracing in PIP new_cost_table * Update stat peer_count * Use number of leeching peers for Light serve costs * Fix test::light_params_load_share_depends_on_max_peers (wrong type) * Remove (now) useless test * Remove `load_share` from LightParams.Config Prevent div. by 0 * Add LEECHER_COUNT_FACTOR * PR Grumble: u64 to u32 for f64 casting * Prevent u32 overflow for avg_peer_count * Add tests for LightSync::Statistics * Fix empty steps (#9939) * Don't send empty step twice or empty step then block. * Perform basic validation of locally sealed blocks. * Don't include empty step twice. * prevent silent errors in daemon mode, closes #9367 (#9946) * Fix light client informant while syncing (#9932) * Add `is_idle` to LightSync to check importing status * Use SyncStateWrapper to make sure is_idle gets updates * Update is_major_import to use verified queue size as well * Add comment for `is_idle` * Add Debug to `SyncStateWrapper` * `fn get` -> `fn into_inner` * ci: rearrange pipeline by logic (#9970) * ci: rearrange pipeline by logic * ci: rename docs script * Add readiness check for docker container (#9804) * Update Dockerfile Since parity is built for "mission critical use", I thought other operators may see the need for this. Adding the `curl` and `jq` commands allows for an extremely simple health check to be usable in container orchestrators. For example. Here is a health check for a parity docker container running in Kubernetes. This can be setup as a readiness Probe that would prevent clustered nodes that aren't ready from serving traffic. ```bash #!/bin/bash ETH_SYNCING=$(curl -X POST --data '{"jsonrpc":"2.0","method":"eth_syncing","params":[],"id":1}' http://localhost:8545 -H 'Content-Type: application/json') RESULT=$(echo "$ETH_SYNCING | jq -r .result) if [ "$RESULT" == "false" ]; then echo "Parity is ready to start accepting traffic" exit 0 else echo "Parity is still syncing the blockchain" exit 1 fi ``` * add sync check script * Fix docker script (#9854) * Dockerfile: change source path of the newly added check_sync.sh (#9869) * Do not use the home directory as the working dir in docker (#9834) * Do not create a home directory. * Re-add -m flag * fix docker build (#9971) * bump smallvec to 0.6 in ethcore-light, ethstore and whisper (#9588) * bump smallvec to 0.6 in ethcore-light, ethstore and whisper * bump transaction-pool * Fix test. * patch cargo to use tokio-proto from git repo this makes sure we no longer depend on smallvec 0.2.1 which is affected by https://github.com/servo/rust-smallvec/issues/96 * use patched version of untrusted 0.5.1 * ci: allow audit to fail
Backport Stable 2.1.6 (#9904 )
2018-11-28 13:14:55 +01:00 · 2018-11-14 14:48:29 +01:00 · 2018-11-01 15:37:22 +01:00
34 changed files with 900 additions and 312 deletions
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -9,16 +9,8 @@ image:                             parity/rust:gitlab-ci
 variables:
  CI_SERVER_NAME:                  "GitLab CI"
  CARGO_HOME:                      "${CI_PROJECT_DIR}/.cargo"
-  BUILD_TARGET:                    ubuntu
-  BUILD_ARCH:                      amd64
  CARGO_TARGET:                    x86_64-unknown-linux-gnu

-cache:
-  key:                             "${CI_JOB_NAME}"
-  paths:
-    - ./target
-    - ./.cargo
-
 .releaseable_branches:             # list of git refs for building GitLab artifacts (think "pre-release binaries")
  only:                            &releaseable_branches
    - stable
@@ -51,6 +43,14 @@ test-linux:
  tags:
    - rust-stable

+test-audit:
+  stage:                           test
+  script:
+    - scripts/gitlab/cargo-audit.sh
+  tags:
+    - rust-stable
+  allow_failure:                   true
+
 build-linux:
  stage:                           build
  only:                            *releaseable_branches
@@ -111,56 +111,28 @@ publish-awss3:
  tags:
    - shell

-docs-jsonrpc:
-  stage:                            optional
+publish-docs:
+  stage:                            publish
  only:
    - tags
  except:
    - nightly
  cache: {}
  script:
-    - scripts/gitlab/docs-jsonrpc.sh
+    - scripts/gitlab/publish-docs.sh
  tags:
    - shell

-cargo-audit:
-  stage:                           optional
-  script:
-    - scripts/gitlab/cargo-audit.sh
-  tags:
-    - rust-stable
-
-test-android:
+build-android:
  stage:                           optional
  image:                           parity/rust-android:gitlab-ci
  variables:
    CARGO_TARGET:                  armv7-linux-androideabi
  script:
-    - scripts/gitlab/test-all.sh stable
+    - scripts/gitlab/build-unix.sh
  tags:
    - rust-arm
-
-test-darwin:
-  stage:                           optional
-  variables:
-    CARGO_TARGET:                  x86_64-apple-darwin
-    CC:                            gcc
-    CXX:                           g++
-    RUN_TESTS:                     cargo
-  script:
-    - scripts/gitlab/test-all.sh stable
-  tags:
-    - rust-osx
-
-test-windows:
-  stage:                           optional
-  variables:
-    CARGO_TARGET:                  x86_64-pc-windows-msvc
-    RUN_TESTS:                     cargo
-  script:
-    - sh scripts/gitlab/test-all.sh stable
-  tags:
-   - rust-windows
+  allow_failure:                   true

 test-beta:
  stage:                           optional
@@ -170,6 +142,7 @@ test-beta:
    - scripts/gitlab/test-all.sh beta
  tags:
    - rust-beta
+  allow_failure:                   true

 test-nightly:
  stage:                           optional
@@ -179,3 +152,4 @@ test-nightly:
    - scripts/gitlab/test-all.sh nightly
  tags:
    - rust-nightly
+  allow_failure:                   true
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -642,7 +642,7 @@ dependencies = [
 "rlp_derive 0.1.0",
 "serde 1.0.78 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_derive 1.0.78 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "stats 0.1.0",
 "tempdir 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 "triehash-ethereum 0.2.0",
@@ -689,7 +689,7 @@ dependencies = [
 "rlp 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-hex 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "trace-time 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "transaction-pool 1.13.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "transaction-pool 1.13.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "url 1.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

@@ -779,7 +779,7 @@ dependencies = [
 "serde_derive 1.0.78 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_json 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 "tiny-keccak 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "transaction-pool 1.13.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "transaction-pool 1.13.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "url 1.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

@@ -817,7 +817,7 @@ dependencies = [
 "tokio 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
 "tokio-core 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
 "tokio-io 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-proto 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-proto 0.1.1 (git+https://github.com/tokio-rs/tokio-proto.git?rev=56c720e)",
 "tokio-service 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "url 1.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -889,7 +889,6 @@ dependencies = [
 "rlp 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-hex 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "trace-time 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "triehash-ethereum 0.2.0",
 ]
@@ -996,7 +995,7 @@ dependencies = [
 "serde 1.0.78 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_derive 1.0.78 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_json 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "tempdir 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 "time 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
 "tiny-keccak 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1289,7 +1288,7 @@ dependencies = [
 "time 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
 "tokio-core 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
 "tokio-io 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-proto 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-proto 0.1.1 (git+https://github.com/tokio-rs/tokio-proto.git?rev=56c720e)",
 "tokio-service 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "unicase 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "want 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1306,7 +1305,7 @@ dependencies = [
 "rustls 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "tokio-core 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
 "tokio-io 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-proto 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-proto 0.1.1 (git+https://github.com/tokio-rs/tokio-proto.git?rev=56c720e)",
 "tokio-rustls 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "tokio-service 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "webpki-roots 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2008,7 +2007,7 @@ version = "1.12.0"
 dependencies = [
 "jni 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "panic_hook 0.1.0",
- "parity-ethereum 2.1.4",
+ "parity-ethereum 2.1.7",
 ]

 [[package]]
@@ -2024,7 +2023,7 @@ dependencies = [

 [[package]]
 name = "parity-ethereum"
-version = "2.1.4"
+version = "2.1.7"
 dependencies = [
 "ansi_term 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2074,7 +2073,7 @@ dependencies = [
 "parity-rpc 1.12.0",
 "parity-rpc-client 1.4.0",
 "parity-updater 1.12.0",
- "parity-version 2.1.4",
+ "parity-version 2.1.7",
 "parity-whisper 0.1.0",
 "parking_lot 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
 "pretty_assertions 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2239,7 +2238,7 @@ dependencies = [
 "parity-crypto 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "parity-reactor 0.1.0",
 "parity-updater 1.12.0",
- "parity-version 2.1.4",
+ "parity-version 2.1.7",
 "parking_lot 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
 "patricia-trie 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "pretty_assertions 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2254,7 +2253,7 @@ dependencies = [
 "tempdir 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 "tiny-keccak 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "tokio-timer 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "transaction-pool 1.13.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "transaction-pool 1.13.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "transient-hashmap 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "vm 0.1.0",
 ]
@@ -2329,7 +2328,7 @@ dependencies = [
 "parity-bytes 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "parity-hash-fetch 1.12.0",
 "parity-path 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "parity-version 2.1.4",
+ "parity-version 2.1.7",
 "parking_lot 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
 "rand 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2339,7 +2338,7 @@ dependencies = [

 [[package]]
 name = "parity-version"
-version = "2.1.4"
+version = "2.1.7"
 dependencies = [
 "parity-bytes 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "rlp 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2381,7 +2380,7 @@ dependencies = [
 "serde_derive 1.0.78 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_json 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 "slab 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "tiny-keccak 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

@@ -2807,7 +2806,7 @@ dependencies = [
 "libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
 "rayon 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "tempfile 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "untrusted 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "untrusted 0.5.1 (git+https://github.com/paritytech/untrusted?branch=0.5)",
 ]

 [[package]]
@@ -2914,7 +2913,7 @@ dependencies = [
 "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 "ring 0.12.1 (git+https://github.com/paritytech/ring)",
 "sct 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "untrusted 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "untrusted 0.5.1 (git+https://github.com/paritytech/untrusted?branch=0.5)",
 "webpki 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

@@ -2952,7 +2951,7 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "ring 0.12.1 (git+https://github.com/paritytech/ring)",
- "untrusted 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "untrusted 0.5.1 (git+https://github.com/paritytech/untrusted?branch=0.5)",
 ]

 [[package]]
@@ -3049,18 +3048,10 @@ name = "slab"
 version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"

-[[package]]
-name = "smallvec"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "smallvec"
 version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "heapsize 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]

 [[package]]
 name = "smallvec"
@@ -3137,11 +3128,6 @@ dependencies = [
 "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

-[[package]]
-name = "take"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "target_info"
 version = "0.1.0"
@@ -3364,15 +3350,12 @@ dependencies = [
 [[package]]
 name = "tokio-proto"
 version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
+source = "git+https://github.com/tokio-rs/tokio-proto.git?rev=56c720e#56c720ea3c74efa8f39e36c24e609628222b16a1"
 dependencies = [
 "futures 0.1.24 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 "net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
- "slab 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "take 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "tokio-core 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
 "tokio-io 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
 "tokio-service 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3414,7 +3397,7 @@ dependencies = [
 "futures 0.1.24 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustls 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "tokio-io 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-proto 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-proto 0.1.1 (git+https://github.com/tokio-rs/tokio-proto.git?rev=56c720e)",
 ]

 [[package]]
@@ -3536,12 +3519,12 @@ dependencies = [

 [[package]]
 name = "transaction-pool"
-version = "1.13.2"
+version = "1.13.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "error-chain 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "trace-time 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

@@ -3668,7 +3651,7 @@ dependencies = [
 [[package]]
 name = "untrusted"
 version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
+source = "git+https://github.com/paritytech/untrusted?branch=0.5#6e8e92cd31b23272685f340cfde481cb68ac1243"

 [[package]]
 name = "url"
@@ -3781,7 +3764,7 @@ version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "ring 0.12.1 (git+https://github.com/paritytech/ring)",
- "untrusted 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "untrusted 0.5.1 (git+https://github.com/paritytech/untrusted?branch=0.5)",
 ]

 [[package]]
@@ -3789,7 +3772,7 @@ name = "webpki-roots"
 version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "untrusted 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "untrusted 0.5.1 (git+https://github.com/paritytech/untrusted?branch=0.5)",
 "webpki 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

@@ -4135,7 +4118,6 @@ dependencies = [
 "checksum slab 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6dbdd334bd28d328dad1c41b0ea662517883d8880d8533895ef96c8003dec9c4"
 "checksum slab 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "17b4fcaed89ab08ef143da37bc52adbcc04d4a69014f4c1208d6b51f0c47bc23"
 "checksum slab 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5f9776d6b986f77b35c6cf846c11ad986ff128fe0b2b63a3628e3755e8d3102d"
-"checksum smallvec 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4c8cbcd6df1e117c2210e13ab5109635ad68a929fcbb8964dc965b76cb5ee013"
 "checksum smallvec 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)" = "f90c5e5fe535e48807ab94fc611d323935f39d4660c52b26b96446a7b33aef10"
 "checksum smallvec 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)" = "153ffa32fd170e9944f7e0838edf824a754ec4c1fc64746fcc9fe1f8fa602e5d"
 "checksum socket2 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "c4d11a52082057d87cb5caa31ad812f4504b97ab44732cd8359df2e9ff9f48e7"
@@ -4145,7 +4127,6 @@ dependencies = [
 "checksum syn 0.12.15 (registry+https://github.com/rust-lang/crates.io-index)" = "c97c05b8ebc34ddd6b967994d5c6e9852fa92f8b82b3858c39451f97346dcce5"
 "checksum syn 0.13.11 (registry+https://github.com/rust-lang/crates.io-index)" = "14f9bf6292f3a61d2c716723fdb789a41bbe104168e6f496dc6497e531ea1b9b"
 "checksum syn 0.15.4 (registry+https://github.com/rust-lang/crates.io-index)" = "9056ebe7f2d6a38bc63171816fd1d3430da5a43896de21676dc5c0a4b8274a11"
-"checksum take 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b157868d8ac1f56b64604539990685fa7611d8fa9e5476cf0c02cf34d32917c5"
 "checksum target_info 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c63f48baada5c52e65a29eef93ab4f8982681b67f9e8d29c7b05abcfec2b9ffe"
 "checksum tempdir 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "15f2b5fb00ccdf689e0149d1b1b3c03fead81c2b37735d812fa8bddbbf41b6d8"
 "checksum tempfile 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "11ce2fe9db64b842314052e2421ac61a73ce41b898dc8e3750398b219c5fc1e0"
@@ -4168,7 +4149,7 @@ dependencies = [
 "checksum tokio-fs 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "b5cbe4ca6e71cb0b62a66e4e6f53a8c06a6eefe46cc5f665ad6f274c9906f135"
 "checksum tokio-io 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8d6cc2de7725863c86ac71b0b9068476fec50834f055a243558ef1655bbd34cb"
 "checksum tokio-named-pipes 0.1.0 (git+https://github.com/nikvolf/tokio-named-pipes)" = "<none>"
-"checksum tokio-proto 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8fbb47ae81353c63c487030659494b295f6cb6576242f907f203473b191b0389"
+"checksum tokio-proto 0.1.1 (git+https://github.com/tokio-rs/tokio-proto.git?rev=56c720e)" = "<none>"
 "checksum tokio-reactor 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "4bfbaf9f260635649ec26b6fb4aded03887295ffcd999f6e43fd2c4758f758ea"
 "checksum tokio-retry 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f05746ae87dca83a2016b4f5dba5b237b897dd12fd324f60afe282112f16969a"
 "checksum tokio-rustls 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a9263e472d976e4345e50c6cce4cfe6b17c71593ea593cce1df26f1efd36debb"
@@ -4182,7 +4163,7 @@ dependencies = [
 "checksum tokio-uds 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "424c1ed15a0132251813ccea50640b224c809d6ceafb88154c1a8775873a0e89"
 "checksum toml 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "a0263c6c02c4db6c8f7681f9fd35e90de799ebd4cfdeab77a38f4ff6b3d8c0d9"
 "checksum trace-time 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dbe82f2f0bf1991e163e757baf044282823155dd326e70f44ce2186c3c320cc9"
-"checksum transaction-pool 1.13.2 (registry+https://github.com/rust-lang/crates.io-index)" = "fdb8870eea404a57e2f62056ac45067a53a6207fd31866122356481d3c2e1a30"
+"checksum transaction-pool 1.13.3 (registry+https://github.com/rust-lang/crates.io-index)" = "e5866e5126b14358f1d7af4bf51a0be677a363799b90e655edcec8254edef1d2"
 "checksum transient-hashmap 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "aeb4b191d033a35edfce392a38cdcf9790b6cebcb30fa690c312c29da4dc433e"
 "checksum trezor-sys 1.0.0 (git+https://github.com/paritytech/trezor-sys)" = "<none>"
 "checksum trie-standardmap 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0e26f52976a57a0859616d6fcec87092ac35d08eabbd78dc3dabee93b480ea5f"
@@ -4198,7 +4179,7 @@ dependencies = [
 "checksum unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "882386231c45df4700b275c7ff55b6f3698780a650026380e72dabe76fa46526"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
 "checksum unreachable 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "382810877fe448991dfc7f0dd6e3ae5d58088fd0ea5e35189655f84e6814fa56"
-"checksum untrusted 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f392d7819dbe58833e26872f5f6f0d68b7bbbe90fc3667e98731c4a15ad9a7ae"
+"checksum untrusted 0.5.1 (git+https://github.com/paritytech/untrusted?branch=0.5)" = "<none>"
 "checksum url 1.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2a321979c09843d272956e73700d12c4e7d3d92b2ee112b31548aef0d4efc5a6"
 "checksum utf8-ranges 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "fd70f467df6810094968e2fce0ee1bd0e87157aceb026a8c083bcf5e25b9efe4"
 "checksum vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 description = "Parity Ethereum client"
 name = "parity-ethereum"
 # NOTE Make sure to update util/version/Cargo.toml as well
-version = "2.1.4"
+version = "2.1.7"
 license = "GPL-3.0"
 authors = ["Parity Technologies <admin@parity.io>"]

@@ -140,3 +140,5 @@ members = [

 [patch.crates-io]
 ring = { git = "https://github.com/paritytech/ring" }
+tokio-proto = { git = "https://github.com/tokio-rs/tokio-proto.git", rev = "56c720e" }
+untrusted = { git = "https://github.com/paritytech/untrusted", branch = "0.5" }
--- a/ethcore/light/Cargo.toml
+++ b/ethcore/light/Cargo.toml
@@ -23,7 +23,7 @@ vm = { path = "../vm" }
 fastmap = { path = "../../util/fastmap" }
 rlp = { version = "0.2.4", features = ["ethereum"] }
 rlp_derive = { path = "../../util/rlp_derive" }
-smallvec = "0.4"
+smallvec = "0.6"
 futures = "0.1"
 rand = "0.4"
 itertools = "0.5"
--- a/ethcore/light/src/net/mod.rs
+++ b/ethcore/light/src/net/mod.rs
@@ -28,7 +28,7 @@ use parking_lot::{Mutex, RwLock};
 use provider::Provider;
 use request::{Request, NetworkRequests as Requests, Response};
 use rlp::{RlpStream, Rlp};
-use std::collections::{HashMap, HashSet};
+use std::collections::{HashMap, HashSet, VecDeque};
 use std::fmt;
 use std::ops::{BitOr, BitAnd, Not};
 use std::sync::Arc;
@@ -38,7 +38,7 @@ use std::time::{Duration, Instant};
 use self::request_credits::{Credits, FlowParams};
 use self::context::{Ctx, TickCtx};
 use self::error::Punishment;
-use self::load_timer::{LoadDistribution, NullStore};
+use self::load_timer::{LoadDistribution, NullStore, MOVING_SAMPLE_SIZE};
 use self::request_set::RequestSet;
 use self::id_guard::IdGuard;

@@ -70,6 +70,16 @@ const PROPAGATE_TIMEOUT_INTERVAL: Duration = Duration::from_secs(5);
 const RECALCULATE_COSTS_TIMEOUT: TimerToken = 3;
 const RECALCULATE_COSTS_INTERVAL: Duration = Duration::from_secs(60 * 60);

+const STATISTICS_TIMEOUT: TimerToken = 4;
+const STATISTICS_INTERVAL: Duration = Duration::from_secs(15);
+
+/// Maximum load share for the light server
+pub const MAX_LIGHTSERV_LOAD: f64 = 0.5;
+
+/// Factor to multiply leecher count to cater for
+/// extra sudden connections (should be >= 1.0)
+pub const LEECHER_COUNT_FACTOR: f64 = 1.25;
+
 // minimum interval between updates.
 const UPDATE_INTERVAL: Duration = Duration::from_millis(5000);

@@ -256,18 +266,18 @@ pub trait Handler: Send + Sync {
 pub struct Config {
 	/// How many stored seconds of credits peers should be able to accumulate.
 	pub max_stored_seconds: u64,
-	/// How much of the total load capacity each peer should be allowed to take.
-	pub load_share: f64,
+	/// The network config median peers (used as default peer count)
+	pub median_peers: f64,
 }

 impl Default for Config {
 	fn default() -> Self {
-		const LOAD_SHARE: f64 = 1.0 / 25.0;
+		const MEDIAN_PEERS: f64 = 25.0;
 		const MAX_ACCUMULATED: u64 = 60 * 5; // only charge for 5 minutes.

 		Config {
 			max_stored_seconds: MAX_ACCUMULATED,
-			load_share: LOAD_SHARE,
+			median_peers: MEDIAN_PEERS,
 		}
 	}
 }
@@ -335,6 +345,42 @@ mod id_guard {
 	}
 }

+/// Provides various statistics that could
+/// be used to compute costs
+pub struct Statistics {
+	/// Samples of peer count
+	peer_counts: VecDeque<usize>,
+}
+
+impl Statistics {
+	/// Create a new Statistics instance
+	pub fn new() -> Self {
+		Statistics {
+			peer_counts: VecDeque::with_capacity(MOVING_SAMPLE_SIZE),
+		}
+	}
+
+	/// Add a new peer_count sample
+	pub fn add_peer_count(&mut self, peer_count: usize) {
+		while self.peer_counts.len() >= MOVING_SAMPLE_SIZE {
+			self.peer_counts.pop_front();
+		}
+		self.peer_counts.push_back(peer_count);
+	}
+
+	/// Get the average peer count from previous samples. Is always >= 1.0
+	pub fn avg_peer_count(&self) -> f64 {
+		let len = self.peer_counts.len();
+		if len == 0 {
+			return 1.0;
+		}
+		let avg = self.peer_counts.iter()
+			.fold(0, |sum: u32, &v| sum.saturating_add(v as u32)) as f64
+			/ len as f64;
+		avg.max(1.0)
+	}
+}
+
 /// This is an implementation of the light ethereum network protocol, abstracted
 /// over a `Provider` of data and a p2p network.
 ///
@@ -359,6 +405,7 @@ pub struct LightProtocol {
 	req_id: AtomicUsize,
 	sample_store: Box<SampleStore>,
 	load_distribution: LoadDistribution,
+	statistics: RwLock<Statistics>,
 }

 impl LightProtocol {
@@ -369,9 +416,11 @@ impl LightProtocol {
 		let genesis_hash = provider.chain_info().genesis_hash;
 		let sample_store = params.sample_store.unwrap_or_else(|| Box::new(NullStore));
 		let load_distribution = LoadDistribution::load(&*sample_store);
+		// Default load share relative to median peers
+		let load_share = MAX_LIGHTSERV_LOAD / params.config.median_peers;
 		let flow_params = FlowParams::from_request_times(
 			|kind| load_distribution.expected_time(kind),
-			params.config.load_share,
+			load_share,
 			Duration::from_secs(params.config.max_stored_seconds),
 		);

@@ -389,6 +438,7 @@ impl LightProtocol {
 			req_id: AtomicUsize::new(0),
 			sample_store,
 			load_distribution,
+			statistics: RwLock::new(Statistics::new()),
 		}
 	}

@@ -408,6 +458,16 @@ impl LightProtocol {
 		)
 	}

+	/// Get the number of active light peers downloading from the
+	/// node
+	pub fn leecher_count(&self) -> usize {
+		let credit_limit = *self.flow_params.read().limit();
+		// Count the number of peers that used some credit
+		self.peers.read().iter()
+			.filter(|(_, p)| p.lock().local_credits.current() < credit_limit)
+			.count()
+	}
+
 	/// Make a request to a peer.
 	///
 	/// Fails on: nonexistent peer, network error, peer not server,
@@ -772,12 +832,16 @@ impl LightProtocol {
 	fn begin_new_cost_period(&self, io: &IoContext) {
 		self.load_distribution.end_period(&*self.sample_store);

+		let avg_peer_count = self.statistics.read().avg_peer_count();
+		// Load share relative to average peer count +LEECHER_COUNT_FACTOR%
+		let load_share = MAX_LIGHTSERV_LOAD / (avg_peer_count * LEECHER_COUNT_FACTOR);
 		let new_params = Arc::new(FlowParams::from_request_times(
 			|kind| self.load_distribution.expected_time(kind),
-			self.config.load_share,
+			load_share,
 			Duration::from_secs(self.config.max_stored_seconds),
 		));
 		*self.flow_params.write() = new_params.clone();
+		trace!(target: "pip", "New cost period: avg_peers={} ; cost_table:{:?}", avg_peer_count, new_params.cost_table());

 		let peers = self.peers.read();
 		let now = Instant::now();
@@ -797,6 +861,11 @@ impl LightProtocol {
 			peer_info.awaiting_acknowledge = Some((now, new_params.clone()));
 		}
 	}
+
+	fn tick_statistics(&self) {
+		let leecher_count = self.leecher_count();
+		self.statistics.write().add_peer_count(leecher_count);
+	}
 }

 impl LightProtocol {
@@ -1099,6 +1168,8 @@ impl NetworkProtocolHandler for LightProtocol {
 			.expect("Error registering sync timer.");
 		io.register_timer(RECALCULATE_COSTS_TIMEOUT, RECALCULATE_COSTS_INTERVAL)
 			.expect("Error registering request timer interval token.");
+		io.register_timer(STATISTICS_TIMEOUT, STATISTICS_INTERVAL)
+			.expect("Error registering statistics timer.");
 	}

 	fn read(&self, io: &NetworkContext, peer: &PeerId, packet_id: u8, data: &[u8]) {
@@ -1119,6 +1190,7 @@ impl NetworkProtocolHandler for LightProtocol {
 			TICK_TIMEOUT => self.tick_handlers(&io),
 			PROPAGATE_TIMEOUT => self.propagate_transactions(&io),
 			RECALCULATE_COSTS_TIMEOUT => self.begin_new_cost_period(&io),
+			STATISTICS_TIMEOUT => self.tick_statistics(),
 			_ => warn!(target: "pip", "received timeout on unknown token {}", timer),
 		}
 	}
--- a/ethcore/light/src/net/tests/mod.rs
+++ b/ethcore/light/src/net/tests/mod.rs
@@ -22,9 +22,10 @@ use ethcore::client::{EachBlockWith, TestBlockChainClient};
 use ethcore::encoded;
 use ethcore::ids::BlockId;
 use ethereum_types::{H256, U256, Address};
-use net::{LightProtocol, Params, packet, Peer};
+use net::{LightProtocol, Params, packet, Peer, Statistics};
 use net::context::IoContext;
 use net::status::{Capabilities, Status};
+use net::load_timer::MOVING_SAMPLE_SIZE;
 use network::{PeerId, NodeId};
 use provider::Provider;
 use request;
@@ -780,3 +781,34 @@ fn get_transaction_index() {
 	let expected = Expect::Respond(packet::RESPONSE, response);
 	proto.handle_packet(&expected, 1, packet::REQUEST, &request_body);
 }
+
+#[test]
+fn sync_statistics() {
+	let mut stats = Statistics::new();
+
+	// Empty set should return 1.0
+	assert_eq!(stats.avg_peer_count(), 1.0);
+
+	// Average < 1.0 should return 1.0
+	stats.add_peer_count(0);
+	assert_eq!(stats.avg_peer_count(), 1.0);
+
+	stats = Statistics::new();
+
+	const N: f64 = 50.0;
+
+	for i in 1..(N as usize + 1) {
+		stats.add_peer_count(i);
+	}
+
+	// Compute the average for the sum 1..N
+	assert_eq!(stats.avg_peer_count(), N * (N + 1.0) / 2.0 / N);
+
+	for _ in 1..(MOVING_SAMPLE_SIZE + 1) {
+		stats.add_peer_count(40);
+	}
+
+	// Test that it returns the average of the last
+	// `MOVING_SAMPLE_SIZE` values
+	assert_eq!(stats.avg_peer_count(), 40.0);
+}
--- a/ethcore/res/ethereum/classic.json
+++ b/ethcore/res/ethereum/classic.json
@@ -3068,17 +3068,18 @@
 		]
 	  },
 	"nodes": [
-		"enode://e809c4a2fec7daed400e5e28564e23693b23b2cc5a019b612505631bbe7b9ccf709c1796d2a3d29ef2b045f210caf51e3c4f5b6d3587d43ad5d6397526fa6179@174.112.32.157:30303",
-		"enode://6e538e7c1280f0a31ff08b382db5302480f775480b8e68f8febca0ceff81e4b19153c6f8bf60313b93bef2cc34d34e1df41317de0ce613a201d1660a788a03e2@52.206.67.235:30303",
+		"enode://efd48ad0879eeb7f9cb5e50f33f7bc21e805a72e90361f145baaa22dd75d111e7cd9c93f1b7060dcb30aa1b3e620269336dbf32339fea4c18925a4c15fe642df@18.205.66.229:30303",
 		"enode://5fbfb426fbb46f8b8c1bd3dd140f5b511da558cd37d60844b525909ab82e13a25ee722293c829e52cb65c2305b1637fa9a2ea4d6634a224d5f400bfe244ac0de@162.243.55.45:30303",
-		"enode://42d8f29d1db5f4b2947cd5c3d76c6d0d3697e6b9b3430c3d41e46b4bb77655433aeedc25d4b4ea9d8214b6a43008ba67199374a9b53633301bca0cd20c6928ab@104.155.176.151:30303",
-		"enode://814920f1ec9510aa9ea1c8f79d8b6e6a462045f09caa2ae4055b0f34f7416fca6facd3dd45f1cf1673c0209e0503f02776b8ff94020e98b6679a0dc561b4eba0@104.154.136.117:30303",
-		"enode://72e445f4e89c0f476d404bc40478b0df83a5b500d2d2e850e08eb1af0cd464ab86db6160d0fde64bd77d5f0d33507ae19035671b3c74fec126d6e28787669740@104.198.71.200:30303",
-		"enode://39abab9d2a41f53298c0c9dc6bbca57b0840c3ba9dccf42aa27316addc1b7e56ade32a0a9f7f52d6c5db4fe74d8824bcedfeaecf1a4e533cacb71cf8100a9442@144.76.238.49:30303",
-		"enode://f50e675a34f471af2438b921914b5f06499c7438f3146f6b8936f1faeb50b8a91d0d0c24fb05a66f05865cd58c24da3e664d0def806172ddd0d4c5bdbf37747e@144.76.238.49:30306",
-		"enode://83b33409349ffa25e150555f7b4f8deebc68f3d34d782129dc3c8ba07b880c209310a4191e1725f2f6bef59bce9452d821111eaa786deab08a7e6551fca41f4f@159.89.223.6:30303",
-		"enode://5cd218959f8263bc3721d7789070806b0adff1a0ed3f95ec886fb469f9362c7507e3b32b256550b9a7964a23a938e8d42d45a0c34b332bfebc54b29081e83b93@35.187.57.94:30303",
-		"enode://6dd3ac8147fa82e46837ec8c3223d69ac24bcdbab04b036a3705c14f3a02e968f7f1adfcdb002aacec2db46e625c04bf8b5a1f85bb2d40a479b3cc9d45a444af@104.237.131.102:30303"
+		"enode://6dd3ac8147fa82e46837ec8c3223d69ac24bcdbab04b036a3705c14f3a02e968f7f1adfcdb002aacec2db46e625c04bf8b5a1f85bb2d40a479b3cc9d45a444af@104.237.131.102:30303",
+		"enode://b9e893ea9cb4537f4fed154233005ae61b441cd0ecd980136138c304fefac194c25a16b73dac05fc66a4198d0c15dd0f33af99b411882c68a019dfa6bb703b9d@18.130.93.66:30303",
+		"enode://3fe9705a02487baea45c1ffebfa4d84819f5f1e68a0dbc18031553242a6a08e39499b61e361a52c2a92f9553efd63763f6fdd34692be0d4ba6823bb2fc346009@178.62.238.75:30303",
+		"enode://d50facc65e46bda6ff594b6e95491efa16e067de41ae96571d9f3cb853d538c44864496fa5e4df10115f02bbbaf47853f932e110a44c89227da7c30e96840596@188.166.163.187:30303",
+		"enode://a0d5c589dc02d008fe4237da9877a5f1daedee0227ab612677eabe323520f003eb5e311af335de9f7964c2092bbc2b3b7ab1cce5a074d8346959f0868b4e366e@46.101.78.44:30303",
+		"enode://c071d96b0c0f13006feae3977fb1b3c2f62caedf643df9a3655bc1b60f777f05e69a4e58bf3547bb299210092764c56df1e08380e91265baa845dca8bc0a71da@68.183.99.5:30303",
+		"enode://83b33409349ffa25e150555f7b4f8deebc68f3d34d782129dc3c8ba07b880c209310a4191e1725f2f6bef59bce9452d821111eaa786deab08a7e6551fca41f4f@206.189.68.191:30303",
+		"enode://0daae2a30f2c73b0b257746587136efb8e3479496f7ea1e943eeb9a663b72dd04582f699f7010ee02c57fc45d1f09568c20a9050ff937f9139e2973ddd98b87b@159.89.169.103:30303",
+		"enode://50808461dd73b3d70537e4c1e5fafd1132b3a90f998399af9205f8889987d62096d4e853813562dd43e7270a71c9d9d4e4dd73a534fdb22fbac98c389c1a7362@178.128.55.119:30303",
+		"enode://5cd218959f8263bc3721d7789070806b0adff1a0ed3f95ec886fb469f9362c7507e3b32b256550b9a7964a23a938e8d42d45a0c34b332bfebc54b29081e83b93@35.187.57.94:30303"
 	],
 	"accounts": {
 		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
--- a/ethcore/res/ethereum/foundation.json
+++ b/ethcore/res/ethereum/foundation.json
@@ -177,8 +177,8 @@
 		"stateRoot": "0xd7f8974fb5ac78d9ac099b9ad5018bedc2ce0a72dad1827a1709da30580f0544"
 	},
 	"hardcodedSync": 	{
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-		"totalDifficulty": "7128515864594819065361",
+		"header": "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",
+		"totalDifficulty": "7772265011609637471285",
 		"CHTs": [
 			"0x0eb474b7721727204978e92e27d31cddff56471911e424a4c8271c35f9c982cc",
 			"0xe10e94515fb5ffb7ffa9bf50db4a959b3f50c2ff75e0b8bd5f5e038749e52a11",
@@ -3346,7 +3346,108 @@
 			"0xae4a71712cc96a5b30b45e3b92c339c2e975e4ed683f4d1fcadcdc121ff7c6bf",
 			"0x226f6d8c71ec32c5eaab6b01c0fc1d00ae95e60b383d09560e90549b79eb1447",
 			"0xf3dec779841c9384df93bcefbba8700a292b570b29d286a7c9c5a442b4788a20",
-			"0x63ef48e80efa45383857adcb0f31076393260cbad058d1938345ad13faae50b4"
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+			"0xfb0c46a588438f4f217e183ef7772b649b5a45a318253496b01676253dedb568",
+			"0xd6dba12c700a0c5ca59b9d17f628066405de8e4399f92472cccce2e25e70ba4d",
+			"0x2390984444cbc9de301adaf0853f4f6ed2fb56fefeabce717306cf1e40da9618",
+			"0xa6992b0db82c50ce623febc7f16c8a316ce262255de11ad1914316b3d986fe66",
+			"0x96787cf8e0a70ffe5b84151ae8219362ba6d9465223c23c135590fe4cb9ab592",
+			"0x0b4e7fba24f6bed3790b8fc289e2715d9a3f4235c9316dd9d4f889f710a65ae4",
+			"0x49585a7af98ad032371df01c458fab933ac399ff4d2d35731a2d86fc136b5eb8",
+			"0x517947f22d8d56466dbb496f3e98fcd01864176af19be2112f2260e55bddbd58",
+			"0xbc0aa38cbc79c3557fa81e446071e6d531989d088c6311060bff971e430fa36b",
+			"0x5a0a88750db7ad3190dcaaf5bde2649e6fd99cc5b05979fff84ae689ed47b51b",
+			"0x9ad902d6abe59faabfa5fde485c2fe16f6f3e2c41aa8bdaba021e94a3c292dc8",
+			"0xbd6e7bf8b466940b9f619e3f433fb68c68d344974798996e454c925e2628b1b2",
+			"0x112b5e9d438eb79aa9d7b4488b6aa9f7edf7599dce805d8781510302da45e9a2",
+			"0x881255ae2cab543ee6b429e1b201c197cb35051d53f881cb51fc58f9c760e51d",
+			"0xcf56a4ed6b771e4905e6ba888390526eba8ba3483ead7585dee00c0eaea58cbc",
+			"0x12705d1609ee34bce0c82bab9da730452db57863371f5b84de84c4c135537237",
+			"0xa9abc081a75bfcde86ea830483be240cb3bcfa72ae34a16dfc35cb964dd7a457",
+			"0x65cf0c91f8567d8567ac3f00ddc19da0b916179266c7e42768fd5d7271e91092",
+			"0x07f15ccc91a47edfe9b67a79d05ed1da1410e3ac16e4a4c2147c3ef0de26ae62",
+			"0xb44eb7db9e4dbe8901bfac43ad54ef27576a3ac0c78218138715e03b3f9a782e",
+			"0x9ef66d20aeccdea66ade0fe8ccc0a85dbe9498305509c8919b670ae8e854a450",
+			"0xb10a7dbd4857f910ae8cca5d1b7a85923adaad65c4b00d1255813efef00c646f",
+			"0x20410bc64b58a1c221f7b38f293700591692c73a785d94a5548b336bd5db10da",
+			"0xed7176f398eb75ae6c1d4348d3882aade99573f8369ef00e809b1ff91b5a9191",
+			"0x35f06785e1f7e362682e969586322b1588624f6025692ca87db21cb199c382f4",
+			"0x9a6b06141660e2bd106f6d46afd2f3e64d72711ffe6a9c495887bc3932f7934e",
+			"0xd64e602a976e86d3948d0f4cf0b8f13a63558d5bdea5affb36eeb91007a653b3",
+			"0x71050553ca1da7234764a5486e4647fdad00652560eb47102c1d0fc039b4b63e",
+			"0x53ba43f79de58a957e8ac0d998ecb4999c68f423b1769d9e8df2405259dcdaa6",
+			"0x17b33d269609bd90fac57eaeb298bf489a3b8a985cfd9998d297c7e0628bc84c",
+			"0x9b47bba7ff6b283e76100e36246c0dcad836ff29a674fbb1c6d2f58e38e29f92",
+			"0x262f8387628500fa26e2cdca6b5938262c8fa81888daed41a09d880df136167f",
+			"0xb6c6d0ed2824a9818fa9476c99a810cf33a0c1fd3f2fb6b7a44603f2442525e7",
+			"0x6f3437e677dcc60cb587f6100eaa2e7ef5c76b57023b63ae61a6a8ed2750512d",
+			"0x4bb5aad759b0c6390cf4dbc6c32e78f2721c2be3f40ca3d11de880fbe90e456a",
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+			"0xbe871fdd431974370e8156fb9347377d1bb07990ff60296abbaaf2c38b4059d0",
+			"0xcbdf566fceb5adc33608a847c77b6f3501cdc4182ba98e04e1f7e8b8ae66ba5b",
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+			"0xdb2c3ef7b8a8a18ad3a8ce7cb8a6be2e1ef2cd694fb3f1b2e0732f2e27c758cb",
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+			"0x2cf1404cc8482698eccde40185740753c47319b1aa30d9204fe53922feaae9b8",
+			"0x553a9e079d09d3f8251947ab37891027fc3d041246f2e43f01321fc3523b508f",
+			"0x35954f131f276933c7ef3938f35c6011806c7dd637fa249451379003d740cbaa",
+			"0x1ee7a658e8a2368391810667c35b8b0e321d381907e2312e7789a3cc7b0341aa",
+			"0x4cb3c908526bc6ccbdd39d855b3b3649e59eec4322bf48f07598d98240101d0c",
+			"0x996eb99b0cb27fb5ec07873af17933f377ed2c131f02926bab74341c475a95a9",
+			"0x68a90de2c8ea439db0417b77a23eb66e7421268335be7e4f593a52b1093681fa",
+			"0x4325afa26bf545951a73c016d866f1c71a5855ef52202b7ad0c54dc23906936d",
+			"0xaf5111b606b0e6d699bb4fb61c8a0592af7eb45dd7357b3e896ebc3e798919ad",
+			"0x4de03498b2d532a8eb01a12edea2a15b8a907d6d23ccfc380507a5d294abce99",
+			"0x5d642ba55dc046ef1b84fe594ae2e46b844cc6590d580e2591ba9c0c1c942c24",
+			"0x8477bb69d6d23ae4f45e56c372d66f42ba7417cf5107136081b5ccdd208b1545",
+			"0x924f641a7cea7cf76ad8920b9ee7c39e74304169571b028fbe40e6ed255a90f4",
+			"0x4b39dbfae8635f286284009a0213c6d267d5f48485a25f2df855c5cac5e7d6ca",
+			"0x61827bf3a120a079111665f78ba2e5ad15943492e4ffdfc708e235f44ce92842",
+			"0xdc0c0dafc340277058a6f8e03bf4e5e733e05fa638e2a8c4ebe4521960bbdc20",
+			"0x7038c52c4e92d6ed20b19481ed63d432325f94ee2a3ad4c0d5e25fafe5b32bd6",
+			"0xe1f5a1123679ce45005d53672018e16648fd44c4a2251802f295d29ed876a0db",
+			"0x173a332438a181f6cf1773b2603556d229254861534f34ad65b2170b0cf47fb5",
+			"0x22a19ab1d828b5d05057f40f5cf798e27ec068fc584968987b7bbe440f52ac84",
+			"0x15b3e3b6e1de6b8a407ad7e325c53c4bfa9e73f23c6f3acedcdf68d759f73860",
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+			"0x9babeec2d3003ddb15fdcb89ec7b61c0d7f795145b58f55a17810447d5afe5be",
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+			"0x3fabed16363d78f34a13ca6b99cfc592671668d4281c5eb3ab07f4b9017a4ebc",
+			"0xb14af7c7331f7b5518e04bc31c8c2b63d9d497acac405bc22e1ab2431105b867",
+			"0xb7b90e8852ae132f858cb98635fd6e1267b141de7da6773ec4092d5c83def42b",
+			"0x1a5c8bed811fc72de8146516cc4d668fc4557baf48082503a2a5cc0e473b6e08",
+			"0x0060158b427095081a18fc57c4f56290873188960dc0e4d2b16cdd57b5761100",
+			"0x2f0dd546f4982d47b6e04ce282b19be8e165b5c89b5f03c1ac8c6d8be2af2b4f",
+			"0x229d31a50f46afeda23a2535c8b011a827383c981e7e59f67622359e4b307a10",
+			"0x10da7b2e78954845b506b9672ff93d3a617f187521116d442b364a1178f10f08",
+			"0x511325c034c772ff3a61b1c8d94e3c13f19cf1e93523a8924666833bc1e5b0ba",
+			"0x3a8b0251b2f7c99774d0a7863388422723b5405fd1db035ec5e30df90306e251",
+			"0x885c3b0507dcdd6e1cec187cf3d97ee12ce101ccf63d99c1c7fc77dd57ee0439",
+			"0xa76f1fdcf546ccb62f86ec7b85bd8eb662f696d7aed2f2ed2b3c769af90897b2",
+			"0xbec073b15a35de54487b60f92615cd44dbcb5a5fa9d1bcca2ea31437b2e45756",
+			"0x662013eba4201630ccc4a9b6fb1dac36f439cc6cd2b6f295c0260713d075108e",
+			"0x81b0148f7e690088330650b01c52831d50f3d30ba2fd2074bca5513c179ad30a",
+			"0x01614cb8f2f2bd6794a20513fffe99a36eee526b7145405db15f9c2ede980093",
+			"0xd3d8664a5464c8f681e37265948c4046e373843e602bee66c8583277397db258",
+			"0xdaf61a9e7157100cce6ea5bc405926fd4190fda7354edaafad9b6e468bb24422",
+			"0xeb05144e032621f7b1792dacbdc79c044a268442a9a9284ef1b2d1d60cadb29f",
+			"0xb1916e802e8e3eca2570d1a190d317cf38cf9f6b58119b65ed0d60b9749461ad",
+			"0x17e103cb26e7c5c7678a523f99f90387490bcca00916190e7e1b38274c52a375",
+			"0x105b8126ef037364f46a44fdca4fea1ec4c099de5a05918688249fb8844dfea0",
+			"0x7ca09f536bb9f0d7b3809c086918ba4750722edfd47153a8412fc761eb4783c8",
+			"0xc988cc2d92dcb85eaff8cf2f70ca49646cc5aff6c8e10b43a0581193137d3b92"
 		]
 	},
 	"nodes": [
--- a/ethcore/res/ethereum/kovan.json
+++ b/ethcore/res/ethereum/kovan.json
@@ -62,8 +62,8 @@
 		"gasLimit": "0x5B8D80"
 	},
 	"hardcodedSync": {
-		"header": "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",
-		"totalDifficulty": "3020091077015059097853315484608800838133866777",
+		"header": "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",
+		"totalDifficulty": "3135776192732436705400032023148164213445066062",
 		"CHTs": [
 			"0xdb9557458495268ddd69409fc1f66631ed5ff9bf6c479be6eabe5d83a460acac",
 			"0xd413800c22172be6e0b7a36348c90098955991f119ddad32c5b928e8db4deb02",
@@ -4470,7 +4470,173 @@
 			"0xbe48c727fb6a32242229eaa09146c76522dcf6bed6d1c6fc1bebf86b5e4ccdb4",
 			"0x8487b971e383272df82cd812a0bf3a2026b85bc3897b4ce9ce48afa00849fe00",
 			"0x60d18b465172f59c0d71594b5273a90cb41db24a5d4c9fc37020f9d8c467a4a2",
-			"0xab4e36d9f17c748c87d89c23b667e3f4e3265e77b62dbd9c92659026f8a53d12"
+			"0xab4e36d9f17c748c87d89c23b667e3f4e3265e77b62dbd9c92659026f8a53d12",
+			"0x2c711e8eec1be3caef6e16a03dcca83dac3a565c93327c67f4e8ea9f2697d9e9",
+			"0x21d7a9a3f22a163767075aa693d82a962e4458b074bd8f3485c4ded1e47c1172",
+			"0x1509cac83867db4b888107974d5c8547dc4aa1db3b8e886291f0f9eb6bd7af58",
+			"0xa555eb6001982080479c9bdd3da9e8668bf90ca9538f16f27a45ae698ec85fb7",
+			"0x1d1f4019fa3ea7ec85ee0a411560738791f2d45fe5fe6242d07267183a852b96",
+			"0x2a8994caa5a27eb3081cc749cda5694da7ed3fbb8a1b4c67d7e92306cbd3c6ab",
+			"0x8389736ba114022ea97a6b3e755d75e74c3c370e9eb916c0f2d73a46a6f6c396",
+			"0x6a2e5d08ea64195a4153fc7bf26b7a99dcc9d31d8f58faa07510a1e87fb1ade4",
+			"0x78b66b38fd9b9cd3a5bc9c91c6f816153c2c28c1055f7ac9ad12ab61f9464850",
+			"0xb2f77834f7a88c4354763a28080d95be44dcb380d01f09292e679a6ed274b179",
+			"0x2070456b2bff0c30ae26b2435af82e153094aeea8102a75541e02a39e9ebe717",
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 		]
 	},
 	"accounts": {
--- a/ethcore/res/ethereum/ropsten.json
+++ b/ethcore/res/ethereum/ropsten.json
@@ -62,8 +62,8 @@
 		"gasLimit": "0x1000000"
 	},
 	"hardcodedSync":{
-		"header": "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",
-		"totalDifficulty": "12027449412394243",
+		"header": "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",
+		"totalDifficulty": "14549054591321060",
 		"CHTs": [
 			"0x614648fc0a459451850bdfe353a932b5ff824e1b568478394f78b3ed5427e37a",
 			"0x1eae561c582dbb7f4e041998e084e165d0332c915d3a6da367638a8d24f3fafc",
@@ -2116,7 +2116,112 @@
 			"0x40384a52564fae5df8c3e41827cdf584e38f3f555a54ca749b7b516619071d85",
 			"0xe52f7c17a4106594563ae7b724e5613e87d8442177f39a36b946b0e335be0e5b",
 			"0x7726202a7c255a9d7be47af6f3b44c1e379cda61237866554396fb6ec043482c",
-			"0x665da353f296cde80e3cbcb9c7f93b107d5676e5cd694b0bd33334d74789beb9"
+			"0x665da353f296cde80e3cbcb9c7f93b107d5676e5cd694b0bd33334d74789beb9",
+			"0xa1157fb181aaa945793b029d3915b37103d050f1f695862d9cda90df4755c189",
+			"0x449c9daae1c38b3d3f6861b63dc611f147b8a29029927f85c32b5e549df8ee9d",
+			"0x5739fcf908f960416e5227ff6f95aeb00696f8eb7192968239458a0aebf42533",
+			"0xfaa6017362d6e64f9ae1b6d11764ddba77cd980261acb5bdbb17b7cdee2d3024",
+			"0x97fee586909cf8b3cfb2f2dd4e251cb642eb551f1e5d9fa557a21dcb66f430c0",
+			"0x9934d90e0b4ec5900107784116323b0f76d1d71491cf9c619520478b6eb97ded",
+			"0x8f5afe4fefb0de810442e27b2bce63e3a424f9e339a0e1f46f6ed26617a4a404",
+			"0xcd12ed1b75e624f93d9e4fe7dc65407b6d7963196e4082fb459ce354977355a1",
+			"0x6858ff0c07de87aa2a88498ae948efe6cffade00f3f21086f0a71b8364090846",
+			"0xaca944e99122e4fe41c62b88e67940332483c8aae2a3a615508f848ceb1c044e",
+			"0xa8bd3a6b9197bec8849737e6771f563d14d7415707776ce4bed9460588c55c9a",
+			"0x20e5f18e795844cfcf2326f52ab1e56f4a53a1ce405fd355e0d37de5f6d552ee",
+			"0x038821cd156d2d9e2aff1ce3525726c42f581ca3e9e2cc75df524a3dbdfe0feb",
+			"0xb79bd23e10d1e6c7ae749cecaa732966ce3c2e2ea8b640d43638f14d7b78a21c",
+			"0x2c4d3bcae4a76ffe6924555b320847211367ee37899b187d8fd4358d91264c2e",
+			"0x0896db7657d2aa8d02166bd4ceba7515b24147fcf0aa34223590fb80db64f848",
+			"0x95f3b077d9cff92709d46185a7dc5d723f257fb77641e436b0f1bf07947844a1",
+			"0x6fdd931a93229698b92e6419074bc308a372e0923b35321b725916c1c151cae0",
+			"0x8c337c36c2027d0f2fb96405f76d3190cdd01237f6a602e07976e09c4a2339e4",
+			"0x8091a859cf86c1e2c22c870ebc10334f50e05bac2a41153102bf3f698bf5156b",
+			"0x382435cc836bf1873e489cb4d42d1c1673c5d1b452ba2d16dbd1ca77b7b87a8c",
+			"0xac5a288b16ed708b00cbe956a14e2a64b321f40851ea25ab1aded7b096822ec6",
+			"0xee95229b736827a21e0b7154873da3da59e38a1ba3e3b1770de2ed973495ce23",
+			"0x5168b6e3b5274054fec17b94a82931bc229d0270e5e4c9aeb61539fe8ba4f4a3",
+			"0x588c6144dfbb33922873946a44f03092bd65d2f89a01b3973002ed38f48917bc",
+			"0x6c51a964953dc036043b6e8c7fba4a3f6e83295306767bcc3562d9a8cdb04497",
+			"0x2cfdde11cc2669c5b504c4a82c31ff03e3f0b3aff044519b44bc39405bbf3c9b",
+			"0xd93200e550400a7179ac7afc394b22b7c710192eadbf429389450e7167191fdb",
+			"0x5e32f497c606c01c9be8ce1cca5f3cf475f62cf38b2195244a7c93df7d064dde",
+			"0xb0b74e34fd3983aef31a0584b6a7483ee936622b5fffbdce1411a9db6171c685",
+			"0x69d0a96a2eca8d6a5c32e700d3f910330930a3348e98e5b276013fcf70c0fe5f",
+			"0xf49cbb26f2463d38fde553e483de2d4bc6dd85efe2d0e56a2a79810df6af6db9",
+			"0xe58aa167a26eadf11257f1fcb5da7eef50f9985b590320cc6c015176965ea58e",
+			"0x582f08d14023a661a9d9dfd1db8324be88fc631cb9136e92f379ad7703584414",
+			"0xb9c5e584f5e231c2c41b41799a945d60b7ec22487e587ef55e2d9710489c3c00",
+			"0xd8b70c6657a5bf1fa4b67c4fc046c1eda284d677c610dbacaf0d2d84e4d782dd",
+			"0x1e29fb536e468abf66b59dd6f48d177a5100a192f1807afc12bb5c97368b8c95",
+			"0x595ac042acdb51370bf6bfd2b2058dda4781dd7ec330474defb2d5dd00e7f50e",
+			"0x3d00887c6509b148c5fadde21014aae94924fef363fd5723d80d6a2028df1de5",
+			"0x9632d419c9fdc7e676b130806cb9c86631aade0adc6a129d3769908ff97e7ef3",
+			"0x2f91c7ce1158228c8264a6147c6ca396b0d536cdde997a922cde2772b786743f",
+			"0xf4c731ac2e2612b7e7afcf3ba5911a58a03ef075133923218f54a736b25acb81",
+			"0x6748a5143ad25f0a461257a47eeab8f057782a438274ced580ca2bd3725d6be3",
+			"0x05a113b04baf81b6396dd32d59a53908d07a374ebdf17314ec334b3330a16697",
+			"0xb1bafaef874da14b8a9f883f89a896ec37d9af1b0958f5a3867780278bfe940d",
+			"0xd93c67d29befe531330c37dfa8b64db7339c8ac35b8cb674d741a414d90d77ef",
+			"0xb4319281a05f00968367a349e626ec63227412193c30aaface14ac6f7a480024",
+			"0xf6dce891724a49024535047bee44f889d5228066a931a8f40c18c7efed60f31b",
+			"0xccdeb308e3402c7dc72588871c23fb4f6fdc60e2a63230f628c5a2951878535b",
+			"0x90958033b917eea42ffb8bf077ccab8b19c2448113e8a128815ab3441846404b",
+			"0xed3436553039948094f33cffaff91a7e2b1eab86b638de5c8eb09538c8df0a8e",
+			"0x0910ba3093e37abaf70ffc0ef6a3b9b82e8c5f7ae497eec14b753f23d0a25343",
+			"0xdc78d9fceec3add33b92e1a0ee402b80cd87946e0def46f284d26eac46be6bcd",
+			"0x1d71a82b8d4b89f73747d8073a36acf8496757d35bb452e9cfd74d758774f492",
+			"0x5399612937722b6fbcb90c1768a92bb35acd4da6168814c1d9deb6156cf35134",
+			"0xc7156ee3591ab91824b2d4868d28baf11855a63a801b3793f99fdde7867eac7f",
+			"0xd25b288f3333ea8e33b33f42edf7b64976281e4840599aa49b07da39f895073a",
+			"0xc6596a87c544e84cfaa2baaa4fb0a93f3fa9d1e6938426ea05a418568a1589b0",
+			"0xdbf30aa7f1cb3a6d7661934d7ea2ec0665843ea1ec9b05fddd77fdb33fa7d834",
+			"0xfac2628cb5d70c177e8defbf62b0448297ecb13962638b9a26c5d05203cb2937",
+			"0xe8c5a65edee74d59e7b9e2fb4779485958d95303fff95bfebc0c1f4bf24ef9bf",
+			"0x67d21b95f40ca7c991f37981393dcec3218e70d5402d82ecbfcb21ae532872bb",
+			"0xba19c10601ed47bffb755f791325c50af9229d5c25294f315116fdb3640ca35a",
+			"0xf4c026f65e31d4606541c4e679d30d7336cfeeb81e9893465eb08c310792c061",
+			"0x5425ff602e06947bda22cfb687ace85c10896b5d48de144149cba26bac9a35ae",
+			"0xe11f82e350c209213da7d977e2de5199559ad3793a24a226cb4be367c0aa3c4a",
+			"0x13fb0194f473a4af296184d3293005dffcd28f1cf4b986bdaacede4a0a096fa6",
+			"0x3dab80c9fc23caf409e38791f07e107da3b5d0d9d4a64f87164e6d455660591b",
+			"0x5901803b234ef0445acfcd884baf0777970d3b600b80ab137dc1015a5b790885",
+			"0x3735e2d0ac017cd2c0570830615ed9eb642183fee5b2c2155e5fefc1d4de2561",
+			"0xea9030afc249a1e4f6c86f4b19660ea63783824e8d1c3de30e38802f1aea9d12",
+			"0x9def3e76927de026a1a76f39c242263ffbf94b3ef42fb6e98626b67ec3d8a308",
+			"0x504886149f29d5eb02412202f04b45f23cc97a82206bdf237c433e83c52e386b",
+			"0xc84d3b9e84727c2d9279dfebcdf8104762e3b101dd9f39c9482a456f87bcf976",
+			"0xf4737cd864b198c8049ece5a4f18eea18b48a649997c42504b560188adfb6f2b",
+			"0x410894a208ff99bd3ec5f925aa7ff6932c4404390df9e337601fa7b7251d09ff",
+			"0xe6e7e7e2b54bcbe37eb7066b9a3c9b01b632d228c8ed5ef8f1871d9b7235a55b",
+			"0x8af02fe4657f956a9ede1a9b0a83d67367b43a8f5efdf6bd753d09f428b58960",
+			"0xdd056794fcb6f5b694934b17ef35577dbec8d04159fe447e0eba02e4ff4e9d96",
+			"0xef94a3289e9e197b04c17886373adbe66a451efe052fb419846006b5f659b91a",
+			"0x5558e5612dc3c222d76e7190409fc5d38479e08f6fdf4b7df299e6da968c2811",
+			"0x5f38cc5046a503d424c4b63cb060956babe0c1de050517d0067eccfa23cb664d",
+			"0x4c6a04827f46e51378e9ff3b811c878dead62da3ae20ef7d392c57512a09a719",
+			"0x68fd9806bea1d937063778b245a6788cd992e4fc614d5bce1ffe06e125f67701",
+			"0x0751a79f86c4220e81bbf6b4692976ed4c315f9b62937b23083f4db2370f04eb",
+			"0x5651840a2065a3468d97bf824e78455eb5e22b82b45fde7bb69b297c4c40e853",
+			"0x959d277feeb492ed3393fcd5774f1dde27c6018b07cc4fc93b937ee266ae12ea",
+			"0xa145f2ed353350a89de97e83433188adbd14107c16c654c131203442c34f2899",
+			"0xf888fc918eab6f88a5f6c6545d47a32dd558f10d00e86a9949cb3f144b7264e2",
+			"0x2fef7f5f1c149c87602cbe38766631abc992efaee26dd5b59e5bc361f6901cf4",
+			"0x5e0735a9be3eb97e790a93502a6f138a8863b0f0c20905bee0ac14d5aff4206a",
+			"0x9c40cbdab8e769c2c6f9de57c23621c5d8a25adaedd1ba9df17fa1680cd4e63f",
+			"0x995e6a00f5bc63f0a5d837a6671260771f12995b82da19c72a9546ae7b93f38f",
+			"0x10f647c754615b475543fca5ed9a4491503867fae619513dad966af63cb7ed2b",
+			"0x7e45b18bd06e946d20bc3807aa926aa5c0a10555b9dc18f9574136969b8f48d5",
+			"0x8a419fcb515eef5a139a37241872c095818fd276f77e6388c74b82ae49e6386f",
+			"0x2cb2d82e278d8ba47830ed3dbd6edf69d2e49721182488ffe0a01698071e7d40",
+			"0x1e9e5cb7a68e7a2decef900bd250bd31c1f024ddd240799327263c72940c7e59",
+			"0x3904821c4388b16e9851e3a7318f4177102da38525cd3e5e5708430a243470a1",
+			"0x7785b9d9ff6dfa45d945aaa393270bf8b62bbde46e941aa068606c173963e518",
+			"0xbff782fbbadfc752f5c2a239e49ab13200fc35cfba29a5332fe936a0367d336c",
+			"0x294a3fd73f102c7017c9208857dfb91ec7c323916dd1bb3c9f1fac2c7d952b4b",
+			"0x3a9fe3685814b6cff7a918e514a9d5375a1fc8268a48d5b78da93dfda115332f",
+			"0xc033a1836983d485e28e5a0825c953a76d4c7f4a8ec5f7eb0b11baf5ae2beb79",
+			"0xb088df91127cad5d72f8db96d7ea86dfdef55374bf982222a45df7d2b631ceb6"
 		]
 	},
 	"nodes": [
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@@ -2252,24 +2252,33 @@ impl ImportSealedBlock for Client {
 	fn import_sealed_block(&self, block: SealedBlock) -> ImportResult {
 		let h = block.header().hash();
 		let start = Instant::now();
+		let header = block.header().clone();
 		let route = {
+			// Do a super duper basic verification to detect potential bugs
+			if let Err(e) = self.engine.verify_block_basic(&header) {
+				self.importer.bad_blocks.report(
+					block.rlp_bytes(),
+					format!("Detected an issue with locally sealed block: {}", e),
+				);
+				return Err(e.into());
+			}
+
 			// scope for self.import_lock
 			let _import_lock = self.importer.import_lock.lock();
 			trace_time!("import_sealed_block");

-			let number = block.header().number();
 			let block_data = block.rlp_bytes();
-			let header = block.header().clone();

 			let route = self.importer.commit_block(block, &header, encoded::Block::new(block_data), self);
-			trace!(target: "client", "Imported sealed block #{} ({})", number, h);
+			trace!(target: "client", "Imported sealed block #{} ({})", header.number(), header.hash());
 			self.state_db.write().sync_cache(&route.enacted, &route.retracted, false);
 			route
 		};
+		let h = header.hash();
 		let route = ChainRoute::from([route].as_ref());
 		self.importer.miner.chain_new_blocks(
 			self,
-			&[h.clone()],
+			&[h],
 			&[],
 			route.enacted(),
 			route.retracted(),
@@ -2277,10 +2286,10 @@ impl ImportSealedBlock for Client {
 		);
 		self.notify(|notify| {
 			notify.new_blocks(
-				vec![h.clone()],
+				vec![h],
 				vec![],
 				route.clone(),
-				vec![h.clone()],
+				vec![h],
 				vec![],
 				start.elapsed(),
 			);
--- a/ethcore/src/engines/authority_round/mod.rs
+++ b/ethcore/src/engines/authority_round/mod.rs
@@ -16,8 +16,8 @@

 //! A blockchain engine that supports a non-instant BFT proof-of-authority.

-use std::collections::{BTreeMap, HashSet};
-use std::fmt;
+use std::collections::{BTreeMap, BTreeSet, HashSet};
+use std::{cmp, fmt};
 use std::iter::FromIterator;
 use std::ops::Deref;
 use std::sync::atomic::{AtomicUsize, AtomicBool, Ordering as AtomicOrdering};
@@ -122,10 +122,10 @@ struct Step {
 }

 impl Step {
-	fn load(&self) -> usize { self.inner.load(AtomicOrdering::SeqCst) }
+	fn load(&self) -> u64 { self.inner.load(AtomicOrdering::SeqCst) as u64 }
 	fn duration_remaining(&self) -> Duration {
 		let now = unix_now();
-		let expected_seconds = (self.load() as u64)
+		let expected_seconds = self.load()
 			.checked_add(1)
 			.and_then(|ctr| ctr.checked_mul(self.duration as u64))
 			.map(Duration::from_secs);
@@ -161,8 +161,8 @@ impl Step {
 		}
 	}

-	fn check_future(&self, given: usize) -> Result<(), Option<OutOfBounds<u64>>> {
-		const REJECTED_STEP_DRIFT: usize = 4;
+	fn check_future(&self, given: u64) -> Result<(), Option<OutOfBounds<u64>>> {
+		const REJECTED_STEP_DRIFT: u64 = 4;

 		// Verify if the step is correct.
 		if given <= self.load() {
@@ -181,8 +181,8 @@ impl Step {
 			let d = self.duration as u64;
 			Err(Some(OutOfBounds {
 				min: None,
-				max: Some(d * current as u64),
-				found: d * given as u64,
+				max: Some(d * current),
+				found: d * given,
 			}))
 		} else {
 			Ok(())
@@ -191,8 +191,8 @@ impl Step {
 }

 // Chain scoring: total weight is sqrt(U256::max_value())*height - step
-fn calculate_score(parent_step: U256, current_step: U256, current_empty_steps: U256) -> U256 {
-	U256::from(U128::max_value()) + parent_step - current_step + current_empty_steps
+fn calculate_score(parent_step: u64, current_step: u64, current_empty_steps: usize) -> U256 {
+	U256::from(U128::max_value()) + U256::from(parent_step) - U256::from(current_step) + U256::from(current_empty_steps)
 }

 struct EpochManager {
@@ -283,13 +283,26 @@ impl EpochManager {
 /// A message broadcast by authorities when it's their turn to seal a block but there are no
 /// transactions. Other authorities accumulate these messages and later include them in the seal as
 /// proof.
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq, Eq)]
 struct EmptyStep {
 	signature: H520,
-	step: usize,
+	step: u64,
 	parent_hash: H256,
 }

+impl PartialOrd for EmptyStep {
+	fn partial_cmp(&self, other: &Self) -> Option<cmp::Ordering> {
+		Some(self.cmp(other))
+	}
+}
+impl Ord for EmptyStep {
+	fn cmp(&self, other: &Self) -> cmp::Ordering {
+		self.step.cmp(&other.step)
+			.then_with(|| self.parent_hash.cmp(&other.parent_hash))
+			.then_with(|| self.signature.cmp(&other.signature))
+	}
+}
+
 impl EmptyStep {
 	fn from_sealed(sealed_empty_step: SealedEmptyStep, parent_hash: &H256) -> EmptyStep {
 		let signature = sealed_empty_step.signature;
@@ -352,7 +365,7 @@ pub fn empty_step_full_rlp(signature: &H520, empty_step_rlp: &[u8]) -> Vec<u8> {
 	s.out()
 }

-pub fn empty_step_rlp(step: usize, parent_hash: &H256) -> Vec<u8> {
+pub fn empty_step_rlp(step: u64, parent_hash: &H256) -> Vec<u8> {
 	let mut s = RlpStream::new_list(2);
 	s.append(&step).append(parent_hash);
 	s.out()
@@ -364,7 +377,7 @@ pub fn empty_step_rlp(step: usize, parent_hash: &H256) -> Vec<u8> {
 /// empty message is included.
 struct SealedEmptyStep {
 	signature: H520,
-	step: usize,
+	step: u64,
 }

 impl Encodable for SealedEmptyStep {
@@ -398,7 +411,7 @@ pub struct AuthorityRound {
 	validators: Box<ValidatorSet>,
 	validate_score_transition: u64,
 	validate_step_transition: u64,
-	empty_steps: Mutex<Vec<EmptyStep>>,
+	empty_steps: Mutex<BTreeSet<EmptyStep>>,
 	epoch_manager: Mutex<EpochManager>,
 	immediate_transitions: bool,
 	block_reward: U256,
@@ -493,7 +506,7 @@ fn header_expected_seal_fields(header: &Header, empty_steps_transition: u64) ->
 	}
 }

-fn header_step(header: &Header, empty_steps_transition: u64) -> Result<usize, ::rlp::DecoderError> {
+fn header_step(header: &Header, empty_steps_transition: u64) -> Result<u64, ::rlp::DecoderError> {
 	let expected_seal_fields = header_expected_seal_fields(header, empty_steps_transition);
 	Rlp::new(&header.seal().get(0).expect(
 		&format!("was either checked with verify_block_basic or is genesis; has {} fields; qed (Make sure the spec file has a correct genesis seal)", expected_seal_fields))).as_val()
@@ -532,17 +545,17 @@ fn header_empty_steps_signers(header: &Header, empty_steps_transition: u64) -> R
 	}
 }

-fn step_proposer(validators: &ValidatorSet, bh: &H256, step: usize) -> Address {
-	let proposer = validators.get(bh, step);
+fn step_proposer(validators: &ValidatorSet, bh: &H256, step: u64) -> Address {
+	let proposer = validators.get(bh, step as usize);
 	trace!(target: "engine", "Fetched proposer for step {}: {}", step, proposer);
 	proposer
 }

-fn is_step_proposer(validators: &ValidatorSet, bh: &H256, step: usize, address: &Address) -> bool {
+fn is_step_proposer(validators: &ValidatorSet, bh: &H256, step: u64, address: &Address) -> bool {
 	step_proposer(validators, bh, step) == *address
 }

-fn verify_timestamp(step: &Step, header_step: usize) -> Result<(), BlockError> {
+fn verify_timestamp(step: &Step, header_step: u64) -> Result<(), BlockError> {
 	match step.check_future(header_step) {
 		Err(None) => {
 			trace!(target: "engine", "verify_timestamp: block from the future");
@@ -563,7 +576,7 @@ fn verify_external(header: &Header, validators: &ValidatorSet, empty_steps_trans
 	let header_step = header_step(header, empty_steps_transition)?;

 	let proposer_signature = header_signature(header, empty_steps_transition)?;
-	let correct_proposer = validators.get(header.parent_hash(), header_step);
+	let correct_proposer = validators.get(header.parent_hash(), header_step as usize);
 	let is_invalid_proposer = *header.author() != correct_proposer || {
 		let empty_steps_rlp = if header.number() >= empty_steps_transition {
 			Some(header_empty_steps_raw(header))
@@ -633,13 +646,13 @@ impl AuthorityRound {
 			panic!("authority_round: step duration can't be zero")
 		}
 		let should_timeout = our_params.start_step.is_none();
-		let initial_step = our_params.start_step.unwrap_or_else(|| (unix_now().as_secs() / (our_params.step_duration as u64))) as usize;
+		let initial_step = our_params.start_step.unwrap_or_else(|| (unix_now().as_secs() / (our_params.step_duration as u64)));
 		let engine = Arc::new(
 			AuthorityRound {
 				transition_service: IoService::<()>::start()?,
 				step: Arc::new(PermissionedStep {
 					inner: Step {
-						inner: AtomicUsize::new(initial_step),
+						inner: AtomicUsize::new(initial_step as usize),
 						calibrate: our_params.start_step.is_none(),
 						duration: our_params.step_duration,
 					},
@@ -650,7 +663,7 @@ impl AuthorityRound {
 				validators: our_params.validators,
 				validate_score_transition: our_params.validate_score_transition,
 				validate_step_transition: our_params.validate_step_transition,
-				empty_steps: Mutex::new(Vec::new()),
+				empty_steps: Default::default(),
 				epoch_manager: Mutex::new(EpochManager::blank()),
 				immediate_transitions: our_params.immediate_transitions,
 				block_reward: our_params.block_reward,
@@ -698,22 +711,41 @@ impl AuthorityRound {
 		})
 	}

-	fn empty_steps(&self, from_step: U256, to_step: U256, parent_hash: H256) -> Vec<EmptyStep> {
-		self.empty_steps.lock().iter().filter(|e| {
-			U256::from(e.step) > from_step &&
-				U256::from(e.step) < to_step &&
-				e.parent_hash == parent_hash
-		}).cloned().collect()
+	fn empty_steps(&self, from_step: u64, to_step: u64, parent_hash: H256) -> Vec<EmptyStep> {
+		let from = EmptyStep {
+			step: from_step + 1,
+			parent_hash,
+			signature: Default::default(),
+		};
+		let to = EmptyStep {
+			step: to_step,
+			parent_hash: Default::default(),
+			signature: Default::default(),
+		};
+
+		if from >= to {
+			return vec![];
+		}
+
+		self.empty_steps.lock()
+			.range(from..to)
+			.filter(|e| e.parent_hash == parent_hash)
+			.cloned()
+			.collect()
 	}

-	fn clear_empty_steps(&self, step: U256) {
+	fn clear_empty_steps(&self, step: u64) {
 		// clear old `empty_steps` messages
-		self.empty_steps.lock().retain(|e| U256::from(e.step) > step);
+		let mut empty_steps = self.empty_steps.lock();
+		*empty_steps = empty_steps.split_off(&EmptyStep {
+			step: step + 1,
+			parent_hash: Default::default(),
+			signature: Default::default(),
+		});
 	}

 	fn handle_empty_step_message(&self, empty_step: EmptyStep) {
-		let mut empty_steps = self.empty_steps.lock();
-		empty_steps.push(empty_step);
+		self.empty_steps.lock().insert(empty_step);
 	}

 	fn generate_empty_step(&self, parent_hash: &H256) {
@@ -743,7 +775,7 @@ impl AuthorityRound {
 		}
 	}

-	fn report_skipped(&self, header: &Header, current_step: usize, parent_step: usize, validators: &ValidatorSet, set_number: u64) {
+	fn report_skipped(&self, header: &Header, current_step: u64, parent_step: u64, validators: &ValidatorSet, set_number: u64) {
 		// we're building on top of the genesis block so don't report any skipped steps
 		if header.number() == 1 {
 			return;
@@ -873,12 +905,12 @@ impl Engine<EthereumMachine> for AuthorityRound {
 		let current_step = self.step.inner.load();

 		let current_empty_steps_len = if header.number() >= self.empty_steps_transition {
-			self.empty_steps(parent_step.into(), current_step.into(), parent.hash()).len()
+			self.empty_steps(parent_step, current_step, parent.hash()).len()
 		} else {
 			0
 		};

-		let score = calculate_score(parent_step.into(), current_step.into(), current_empty_steps_len.into());
+		let score = calculate_score(parent_step, current_step, current_empty_steps_len);
 		header.set_difficulty(score);
 	}

@@ -922,8 +954,8 @@ impl Engine<EthereumMachine> for AuthorityRound {
 		}

 		let header = block.header();
-		let parent_step: U256 = header_step(parent, self.empty_steps_transition)
-			.expect("Header has been verified; qed").into();
+		let parent_step = header_step(parent, self.empty_steps_transition)
+			.expect("Header has been verified; qed");

 		let step = self.step.inner.load();

@@ -958,7 +990,7 @@ impl Engine<EthereumMachine> for AuthorityRound {
 		if is_step_proposer(&*validators, header.parent_hash(), step, header.author()) {
 			// this is guarded against by `can_propose` unless the block was signed
 			// on the same step (implies same key) and on a different node.
-			if parent_step == step.into() {
+			if parent_step == step {
 				warn!("Attempted to seal block on the same step as parent. Is this authority sealing with more than one node?");
 				return Seal::None;
 			}
@@ -970,7 +1002,10 @@ impl Engine<EthereumMachine> for AuthorityRound {
 				block.transactions().is_empty() &&
 				empty_steps.len() < self.maximum_empty_steps {

-				self.generate_empty_step(header.parent_hash());
+				if self.step.can_propose.compare_and_swap(true, false, AtomicOrdering::SeqCst) {
+					self.generate_empty_step(header.parent_hash());
+				}
+
 				return Seal::None;
 			}

@@ -994,7 +1029,7 @@ impl Engine<EthereumMachine> for AuthorityRound {
 					// report any skipped primaries between the parent block and
 					// the block we're sealing, unless we have empty steps enabled
 					if header.number() < self.empty_steps_transition {
-						self.report_skipped(header, step, u64::from(parent_step) as usize, &*validators, set_number);
+						self.report_skipped(header, step, parent_step, &*validators, set_number);
 					}

 					let mut fields = vec![
@@ -1534,12 +1569,12 @@ mod tests {

 		// Two validators.
 		// Spec starts with step 2.
-		header.set_difficulty(calculate_score(U256::from(0), U256::from(2), U256::zero()));
+		header.set_difficulty(calculate_score(0, 2, 0));
 		let signature = tap.sign(addr, Some("0".into()), header.bare_hash()).unwrap();
 		header.set_seal(vec![encode(&2usize).into_vec(), encode(&(&*signature as &[u8])).into_vec()]);
 		assert!(engine.verify_block_family(&header, &parent_header).is_ok());
 		assert!(engine.verify_block_external(&header).is_err());
-		header.set_difficulty(calculate_score(U256::from(0), U256::from(1), U256::zero()));
+		header.set_difficulty(calculate_score(0, 1, 0));
 		let signature = tap.sign(addr, Some("0".into()), header.bare_hash()).unwrap();
 		header.set_seal(vec![encode(&1usize).into_vec(), encode(&(&*signature as &[u8])).into_vec()]);
 		assert!(engine.verify_block_family(&header, &parent_header).is_ok());
@@ -1563,7 +1598,7 @@ mod tests {

 		// Two validators.
 		// Spec starts with step 2.
-		header.set_difficulty(calculate_score(U256::from(0), U256::from(1), U256::zero()));
+		header.set_difficulty(calculate_score(0, 1, 0));
 		let signature = tap.sign(addr, Some("0".into()), header.bare_hash()).unwrap();
 		header.set_seal(vec![encode(&1usize).into_vec(), encode(&(&*signature as &[u8])).into_vec()]);
 		assert!(engine.verify_block_family(&header, &parent_header).is_ok());
@@ -1591,10 +1626,10 @@ mod tests {
 		// Two validators.
 		// Spec starts with step 2.
 		header.set_seal(vec![encode(&5usize).into_vec(), encode(&(&*signature as &[u8])).into_vec()]);
-		header.set_difficulty(calculate_score(U256::from(4), U256::from(5), U256::zero()));
+		header.set_difficulty(calculate_score(4, 5, 0));
 		assert!(engine.verify_block_family(&header, &parent_header).is_ok());
 		header.set_seal(vec![encode(&3usize).into_vec(), encode(&(&*signature as &[u8])).into_vec()]);
-		header.set_difficulty(calculate_score(U256::from(4), U256::from(3), U256::zero()));
+		header.set_difficulty(calculate_score(4, 3, 0));
 		assert!(engine.verify_block_family(&header, &parent_header).is_err());
 	}

@@ -1628,7 +1663,7 @@ mod tests {
 		parent_header.set_seal(vec![encode(&1usize).into_vec()]);
 		parent_header.set_gas_limit("222222".parse::<U256>().unwrap());
 		let mut header: Header = Header::default();
-		header.set_difficulty(calculate_score(U256::from(1), U256::from(3), U256::zero()));
+		header.set_difficulty(calculate_score(1, 3, 0));
 		header.set_gas_limit("222222".parse::<U256>().unwrap());
 		header.set_seal(vec![encode(&3usize).into_vec()]);

@@ -1742,14 +1777,14 @@ mod tests {
 		(spec, tap, accounts)
 	}

-	fn empty_step(engine: &EthEngine, step: usize, parent_hash: &H256) -> EmptyStep {
+	fn empty_step(engine: &EthEngine, step: u64, parent_hash: &H256) -> EmptyStep {
 		let empty_step_rlp = super::empty_step_rlp(step, parent_hash);
 		let signature = engine.sign(keccak(&empty_step_rlp)).unwrap().into();
 		let parent_hash = parent_hash.clone();
 		EmptyStep { step, signature, parent_hash }
 	}

-	fn sealed_empty_step(engine: &EthEngine, step: usize, parent_hash: &H256) -> SealedEmptyStep {
+	fn sealed_empty_step(engine: &EthEngine, step: u64, parent_hash: &H256) -> SealedEmptyStep {
 		let empty_step_rlp = super::empty_step_rlp(step, parent_hash);
 		let signature = engine.sign(keccak(&empty_step_rlp)).unwrap().into();
 		SealedEmptyStep { signature, step }
@@ -1785,6 +1820,11 @@ mod tests {

 		// we've received the message
 		assert!(notify.messages.read().contains(&empty_step_rlp));
+		let len = notify.messages.read().len();
+
+		// make sure that we don't generate empty step for the second time
+		assert_eq!(engine.generate_seal(b1.block(), &genesis_header), Seal::None);
+		assert_eq!(len, notify.messages.read().len());
 	}

 	#[test]
@@ -1999,7 +2039,7 @@ mod tests {
 		let empty_step3 = sealed_empty_step(engine, 3, &parent_header.hash());

 		let empty_steps = vec![empty_step2, empty_step3];
-		header.set_difficulty(calculate_score(U256::from(0), U256::from(4), U256::from(2)));
+		header.set_difficulty(calculate_score(0, 4, 2));
 		let signature = tap.sign(addr1, Some("1".into()), header.bare_hash()).unwrap();
 		header.set_seal(vec![
 			encode(&4usize).into_vec(),
@@ -2114,4 +2154,52 @@ mod tests {
 			BTreeMap::default(),
 		);
 	}
+
+	#[test]
+	fn test_empty_steps() {
+		let last_benign = Arc::new(AtomicUsize::new(0));
+		let params = AuthorityRoundParams {
+			step_duration: 4,
+			start_step: Some(1),
+			validators: Box::new(TestSet::new(Default::default(), last_benign.clone())),
+			validate_score_transition: 0,
+			validate_step_transition: 0,
+			immediate_transitions: true,
+			maximum_uncle_count_transition: 0,
+			maximum_uncle_count: 0,
+			empty_steps_transition: 0,
+			maximum_empty_steps: 10,
+			block_reward: Default::default(),
+			block_reward_contract_transition: 0,
+			block_reward_contract: Default::default(),
+		};
+
+		let mut c_params = ::spec::CommonParams::default();
+		c_params.gas_limit_bound_divisor = 5.into();
+		let machine = ::machine::EthereumMachine::regular(c_params, Default::default());
+		let engine = AuthorityRound::new(params, machine).unwrap();
+
+
+		let parent_hash: H256 = 1.into();
+		let signature = H520::default();
+		let step = |step: u64| EmptyStep {
+			step,
+			parent_hash,
+			signature,
+		};
+
+		engine.handle_empty_step_message(step(1));
+		engine.handle_empty_step_message(step(3));
+		engine.handle_empty_step_message(step(2));
+		engine.handle_empty_step_message(step(1));
+
+		assert_eq!(engine.empty_steps(0, 4, parent_hash), vec![step(1), step(2), step(3)]);
+		assert_eq!(engine.empty_steps(2, 3, parent_hash), vec![]);
+		assert_eq!(engine.empty_steps(2, 4, parent_hash), vec![step(3)]);
+
+		engine.clear_empty_steps(2);
+
+		assert_eq!(engine.empty_steps(0, 3, parent_hash), vec![]);
+		assert_eq!(engine.empty_steps(0, 4, parent_hash), vec![step(3)]);
+	}
 }
--- a/ethcore/src/machine.rs
+++ b/ethcore/src/machine.rs
@@ -371,11 +371,11 @@ impl EthereumMachine {
 	}

 	/// Does verification of the transaction against the parent state.
-	pub fn verify_transaction<C: BlockInfo + CallContract>(&self, t: &SignedTransaction, header: &Header, client: &C)
+	pub fn verify_transaction<C: BlockInfo + CallContract>(&self, t: &SignedTransaction, parent: &Header, client: &C)
 		-> Result<(), transaction::Error>
 	{
 		if let Some(ref filter) = self.tx_filter.as_ref() {
-			if !filter.transaction_allowed(header.parent_hash(), header.number(), t, client) {
+			if !filter.transaction_allowed(&parent.hash(), parent.number() + 1, t, client) {
 				return Err(transaction::Error::NotAllowed.into())
 			}
 		}
--- a/ethcore/src/verification/verification.rs
+++ b/ethcore/src/verification/verification.rs
@@ -147,7 +147,9 @@ pub fn verify_block_family<C: BlockInfo + CallContract>(header: &Header, parent:
 	verify_uncles(params.block, params.block_provider, engine)?;

 	for tx in &params.block.transactions {
-		engine.machine().verify_transaction(tx, header, params.client)?;
+		// transactions are verified against the parent header since the current
+		// state wasn't available when the tx was created
+		engine.machine().verify_transaction(tx, parent, params.client)?;
 	}

 	Ok(())
@@ -245,15 +247,15 @@ fn verify_uncles(block: &PreverifiedBlock, bc: &BlockProvider, engine: &EthEngin

 /// Phase 4 verification. Check block information against transaction enactment results,
 pub fn verify_block_final(expected: &Header, got: &Header) -> Result<(), Error> {
+	if expected.state_root() != got.state_root() {
+		return Err(From::from(BlockError::InvalidStateRoot(Mismatch { expected: expected.state_root().clone(), found: got.state_root().clone() })))
+	}
 	if expected.gas_used() != got.gas_used() {
 		return Err(From::from(BlockError::InvalidGasUsed(Mismatch { expected: expected.gas_used().clone(), found: got.gas_used().clone() })))
 	}
 	if expected.log_bloom() != got.log_bloom() {
 		return Err(From::from(BlockError::InvalidLogBloom(Mismatch { expected: expected.log_bloom().clone(), found: got.log_bloom().clone() })))
 	}
-	if expected.state_root() != got.state_root() {
-		return Err(From::from(BlockError::InvalidStateRoot(Mismatch { expected: expected.state_root().clone(), found: got.state_root().clone() })))
-	}
 	if expected.receipts_root() != got.receipts_root() {
 		return Err(From::from(BlockError::InvalidReceiptsRoot(Mismatch { expected: expected.receipts_root().clone(), found: got.receipts_root().clone() })))
 	}
--- a/ethcore/sync/Cargo.toml
+++ b/ethcore/sync/Cargo.toml
@@ -31,7 +31,6 @@ env_logger = "0.5"
 rand = "0.4"
 heapsize = "0.4"
 semver = "0.9"
-smallvec = { version = "0.4", features = ["heapsizeof"] }
 parking_lot = "0.6"
 trace-time = "0.1"
 ipnetwork = "0.12.6"
--- a/ethcore/sync/src/api.rs
+++ b/ethcore/sync/src/api.rs
@@ -264,12 +264,10 @@ pub struct EthSync {

 fn light_params(
 	network_id: u64,
-	max_peers: u32,
+	median_peers: f64,
 	pruning_info: PruningInfo,
 	sample_store: Option<Box<SampleStore>>,
 ) -> LightParams {
-	const MAX_LIGHTSERV_LOAD: f64 = 0.5;
-
 	let mut light_params = LightParams {
 		network_id: network_id,
 		config: Default::default(),
@@ -282,9 +280,7 @@ fn light_params(
 		sample_store: sample_store,
 	};

-	let max_peers = ::std::cmp::max(max_peers, 1);
-	light_params.config.load_share = MAX_LIGHTSERV_LOAD / max_peers as f64;
-
+	light_params.config.median_peers = median_peers;
 	light_params
 }

@@ -301,9 +297,10 @@ impl EthSync {
 					.map(|mut p| { p.push("request_timings"); light_net::FileStore(p) })
 					.map(|store| Box::new(store) as Box<_>);

+				let median_peers = (params.network_config.min_peers + params.network_config.max_peers) as f64 / 2.0;
 				let light_params = light_params(
 					params.config.network_id,
-					params.network_config.max_peers,
+					median_peers,
 					pruning_info,
 					sample_store,
 				);
@@ -940,19 +937,3 @@ impl LightSyncProvider for LightSync {
 		Default::default() // TODO
 	}
 }
-
-#[cfg(test)]
-mod tests {
-	use super::*;
-
-	#[test]
-	fn light_params_load_share_depends_on_max_peers() {
-		let pruning_info = PruningInfo {
-			earliest_chain: 0,
-			earliest_state: 0,
-		};
-		let params1 = light_params(0, 10, pruning_info.clone(), None);
-		let params2 = light_params(0, 20, pruning_info, None);
-		assert!(params1.config.load_share > params2.config.load_share)
-	}
-}
--- a/ethcore/sync/src/blocks.rs
+++ b/ethcore/sync/src/blocks.rs
@@ -15,7 +15,6 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 use std::collections::{HashSet, HashMap, hash_map};
-use smallvec::SmallVec;
 use hash::{keccak, KECCAK_NULL_RLP, KECCAK_EMPTY_LIST_RLP};
 use heapsize::HeapSizeOf;
 use ethereum_types::H256;
@@ -29,8 +28,6 @@ use transaction::UnverifiedTransaction;

 known_heap_size!(0, HeaderId);

-type SmallHashVec = SmallVec<[H256; 1]>;
-
 #[derive(PartialEq, Debug, Clone)]
 pub struct SyncHeader {
 	pub bytes: Bytes,
@@ -157,7 +154,7 @@ pub struct BlockCollection {
 	/// Used to map body to header.
 	header_ids: HashMap<HeaderId, H256>,
 	/// Used to map receipts root to headers.
-	receipt_ids: HashMap<H256, SmallHashVec>,
+	receipt_ids: HashMap<H256, Vec<H256>>,
 	/// First block in `blocks`.
 	head: Option<H256>,
 	/// Set of block header hashes being downloaded
@@ -519,7 +516,7 @@ impl BlockCollection {
 				let receipts_stream = RlpStream::new_list(0);
 				(Some(receipts_stream.out()), receipt_root)
 			} else {
-				self.receipt_ids.entry(receipt_root).or_insert_with(|| SmallHashVec::new()).push(hash);
+				self.receipt_ids.entry(receipt_root).or_insert_with(Vec::new).push(hash);
 				(None, receipt_root)
 			}
 		} else {
--- a/ethcore/sync/src/lib.rs
+++ b/ethcore/sync/src/lib.rs
@@ -35,7 +35,6 @@ extern crate fastmap;
 extern crate rand;
 extern crate semver;
 extern crate parking_lot;
-extern crate smallvec;
 extern crate rlp;
 extern crate ipnetwork;
 extern crate keccak_hash as hash;
--- a/ethcore/sync/src/light_sync/mod.rs
+++ b/ethcore/sync/src/light_sync/mod.rs
@@ -34,6 +34,7 @@

 use std::collections::{HashMap, HashSet};
 use std::mem;
+use std::ops::Deref;
 use std::sync::Arc;
 use std::time::{Instant, Duration};

@@ -213,6 +214,44 @@ enum SyncState {
 	Rounds(SyncRound),
 }

+/// A wrapper around the SyncState that makes sure to
+/// update the giving reference to `is_idle`
+#[derive(Debug)]
+struct SyncStateWrapper {
+	state: SyncState,
+}
+
+impl SyncStateWrapper {
+	/// Create a new wrapper for SyncState::Idle
+	pub fn idle() -> Self {
+		SyncStateWrapper {
+			state: SyncState::Idle,
+		}
+	}
+
+	/// Set the new state's value, making sure `is_idle` gets updated
+	pub fn set(&mut self, state: SyncState, is_idle_handle: &mut bool) {
+		*is_idle_handle = match state {
+			SyncState::Idle => true,
+			_ => false,
+		};
+		self.state = state;
+	}
+
+	/// Returns the internal state's value
+	pub fn into_inner(self) -> SyncState {
+		self.state
+	}
+}
+
+impl Deref for SyncStateWrapper {
+	type Target = SyncState;
+
+	fn deref(&self) -> &SyncState {
+		&self.state
+	}
+}
+
 struct ResponseCtx<'a> {
 	peer: PeerId,
 	req_id: ReqId,
@@ -235,7 +274,9 @@ pub struct LightSync<L: AsLightClient> {
 	pending_reqs: Mutex<HashMap<ReqId, PendingReq>>, // requests from this handler
 	client: Arc<L>,
 	rng: Mutex<OsRng>,
-	state: Mutex<SyncState>,
+	state: Mutex<SyncStateWrapper>,
+	// We duplicate this state tracking to avoid deadlocks in `is_major_importing`.
+	is_idle: Mutex<bool>,
 }

 #[derive(Debug, Clone)]
@@ -309,16 +350,17 @@ impl<L: AsLightClient + Send + Sync> Handler for LightSync<L> {

 		if new_best.is_none() {
 			debug!(target: "sync", "No peers remain. Reverting to idle");
-			*self.state.lock() = SyncState::Idle;
+			self.set_state(&mut self.state.lock(), SyncState::Idle);
 		} else {
 			let mut state = self.state.lock();

-			*state = match mem::replace(&mut *state, SyncState::Idle) {
+			let next_state = match mem::replace(&mut *state, SyncStateWrapper::idle()).into_inner() {
 				SyncState::Idle => SyncState::Idle,
 				SyncState::AncestorSearch(search) =>
 					SyncState::AncestorSearch(search.requests_abandoned(unfulfilled)),
 				SyncState::Rounds(round) => SyncState::Rounds(round.requests_abandoned(unfulfilled)),
 			};
+			self.set_state(&mut state, next_state);
 		}

 		self.maintain_sync(ctx.as_basic());
@@ -390,12 +432,13 @@ impl<L: AsLightClient + Send + Sync> Handler for LightSync<L> {
 				data: headers,
 			};

-			*state = match mem::replace(&mut *state, SyncState::Idle) {
+			let next_state = match mem::replace(&mut *state, SyncStateWrapper::idle()).into_inner() {
 				SyncState::Idle => SyncState::Idle,
 				SyncState::AncestorSearch(search) =>
 					SyncState::AncestorSearch(search.process_response(&ctx, &*self.client)),
 				SyncState::Rounds(round) => SyncState::Rounds(round.process_response(&ctx)),
 			};
+			self.set_state(&mut state, next_state);
 		}

 		self.maintain_sync(ctx.as_basic());
@@ -408,12 +451,18 @@ impl<L: AsLightClient + Send + Sync> Handler for LightSync<L> {

 // private helpers
 impl<L: AsLightClient> LightSync<L> {
+	/// Sets the LightSync's state, and update
+	/// `is_idle`
+	fn set_state(&self, state: &mut SyncStateWrapper, next_state: SyncState) {
+		state.set(next_state, &mut self.is_idle.lock());
+	}
+
 	// Begins a search for the common ancestor and our best block.
 	// does not lock state, instead has a mutable reference to it passed.
-	fn begin_search(&self, state: &mut SyncState) {
+	fn begin_search(&self, state: &mut SyncStateWrapper) {
 		if let None =  *self.best_seen.lock() {
 			// no peers.
-			*state = SyncState::Idle;
+			self.set_state(state, SyncState::Idle);
 			return;
 		}

@@ -422,7 +471,8 @@ impl<L: AsLightClient> LightSync<L> {

 		trace!(target: "sync", "Beginning search for common ancestor from {:?}",
 			(chain_info.best_block_number, chain_info.best_block_hash));
-		*state = SyncState::AncestorSearch(AncestorSearch::begin(chain_info.best_block_number));
+		let next_state = SyncState::AncestorSearch(AncestorSearch::begin(chain_info.best_block_number));
+		self.set_state(state, next_state);
 	}

 	// handles request dispatch, block import, state machine transitions, and timeouts.
@@ -435,7 +485,7 @@ impl<L: AsLightClient> LightSync<L> {
 		let chain_info = client.chain_info();

 		let mut state = self.state.lock();
-		debug!(target: "sync", "Maintaining sync ({:?})", &*state);
+		debug!(target: "sync", "Maintaining sync ({:?})", **state);

 		// drain any pending blocks into the queue.
 		{
@@ -445,11 +495,12 @@ impl<L: AsLightClient> LightSync<L> {
 			loop {
 				if client.queue_info().is_full() { break }

-				*state = match mem::replace(&mut *state, SyncState::Idle) {
+				let next_state = match mem::replace(&mut *state, SyncStateWrapper::idle()).into_inner() {
 					SyncState::Rounds(round)
 						=> SyncState::Rounds(round.drain(&mut sink, Some(DRAIN_AMOUNT))),
 					other => other,
 				};
+				self.set_state(&mut state, next_state);

 				if sink.is_empty() { break }
 				trace!(target: "sync", "Drained {} headers to import", sink.len());
@@ -483,15 +534,15 @@ impl<L: AsLightClient> LightSync<L> {
 					let network_score = other.as_ref().map(|target| target.head_td);
 					trace!(target: "sync", "No target to sync to. Network score: {:?}, Local score: {:?}",
 						network_score, best_td);
-					*state = SyncState::Idle;
+					self.set_state(&mut state, SyncState::Idle);
 					return;
 				}
 			};

-			match mem::replace(&mut *state, SyncState::Idle) {
+			match mem::replace(&mut *state, SyncStateWrapper::idle()).into_inner() {
 				SyncState::Rounds(SyncRound::Abort(reason, remaining)) => {
 					if remaining.len() > 0 {
-						*state = SyncState::Rounds(SyncRound::Abort(reason, remaining));
+						self.set_state(&mut state, SyncState::Rounds(SyncRound::Abort(reason, remaining)));
 						return;
 					}

@@ -505,7 +556,7 @@ impl<L: AsLightClient> LightSync<L> {
 						AbortReason::NoResponses => {}
 						AbortReason::TargetReached => {
 							debug!(target: "sync", "Sync target reached. Going idle");
-							*state = SyncState::Idle;
+							self.set_state(&mut state, SyncState::Idle);
 							return;
 						}
 					}
@@ -514,15 +565,15 @@ impl<L: AsLightClient> LightSync<L> {
 					self.begin_search(&mut state);
 				}
 				SyncState::AncestorSearch(AncestorSearch::FoundCommon(num, hash)) => {
-					*state = SyncState::Rounds(SyncRound::begin((num, hash), sync_target));
+					self.set_state(&mut state, SyncState::Rounds(SyncRound::begin((num, hash), sync_target)));
 				}
 				SyncState::AncestorSearch(AncestorSearch::Genesis) => {
 					// Same here.
 					let g_hash = chain_info.genesis_hash;
-					*state = SyncState::Rounds(SyncRound::begin((0, g_hash), sync_target));
+					self.set_state(&mut state, SyncState::Rounds(SyncRound::begin((0, g_hash), sync_target)));
 				}
 				SyncState::Idle => self.begin_search(&mut state),
-				other => *state = other, // restore displaced state.
+				other => self.set_state(&mut state, other), // restore displaced state.
 			}
 		}

@@ -543,12 +594,13 @@ impl<L: AsLightClient> LightSync<L> {
 				}
 				drop(pending_reqs);

-				*state = match mem::replace(&mut *state, SyncState::Idle) {
+				let next_state = match mem::replace(&mut *state, SyncStateWrapper::idle()).into_inner() {
 					SyncState::Idle => SyncState::Idle,
 					SyncState::AncestorSearch(search) =>
 						SyncState::AncestorSearch(search.requests_abandoned(&unfulfilled)),
 					SyncState::Rounds(round) => SyncState::Rounds(round.requests_abandoned(&unfulfilled)),
 				};
+				self.set_state(&mut state, next_state);
 			}
 		}

@@ -605,34 +657,14 @@ impl<L: AsLightClient> LightSync<L> {
 				None
 			};

-			*state = match mem::replace(&mut *state, SyncState::Idle) {
+			let next_state = match mem::replace(&mut *state, SyncStateWrapper::idle()).into_inner() {
 				SyncState::Rounds(round) =>
 					SyncState::Rounds(round.dispatch_requests(dispatcher)),
 				SyncState::AncestorSearch(search) =>
 					SyncState::AncestorSearch(search.dispatch_request(dispatcher)),
 				other => other,
 			};
-		}
-	}
-
-	fn is_major_importing_do_wait(&self, wait: bool) -> bool {
-		const EMPTY_QUEUE: usize = 3;
-
-		if self.client.as_light_client().queue_info().unverified_queue_size > EMPTY_QUEUE {
-			return true;
-		}
-		let mg_state = if wait {
-			self.state.lock()
-		} else {
-			if let Some(mg_state) = self.state.try_lock() {
-				mg_state
-			} else {
-				return false;
-			}
-		};
-		match *mg_state {
-			SyncState::Idle => false,
-			_ => true,
+			self.set_state(&mut state, next_state);
 		}
 	}
 }
@@ -651,7 +683,8 @@ impl<L: AsLightClient> LightSync<L> {
 			pending_reqs: Mutex::new(HashMap::new()),
 			client: client,
 			rng: Mutex::new(OsRng::new()?),
-			state: Mutex::new(SyncState::Idle),
+			state: Mutex::new(SyncStateWrapper::idle()),
+			is_idle: Mutex::new(true),
 		})
 	}
 }
@@ -666,9 +699,6 @@ pub trait SyncInfo {

 	/// Whether major sync is underway.
 	fn is_major_importing(&self) -> bool;
-
-	/// Whether major sync is underway, skipping some synchronization.
-	fn is_major_importing_no_sync(&self) -> bool;
 }

 impl<L: AsLightClient> SyncInfo for LightSync<L> {
@@ -681,11 +711,13 @@ impl<L: AsLightClient> SyncInfo for LightSync<L> {
 	}

 	fn is_major_importing(&self) -> bool {
-		self.is_major_importing_do_wait(true)
-	}
+		const EMPTY_QUEUE: usize = 3;

-	fn is_major_importing_no_sync(&self) -> bool {
-		self.is_major_importing_do_wait(false)
+		let queue_info = self.client.as_light_client().queue_info();
+		let is_verifying = queue_info.unverified_queue_size + queue_info.verified_queue_size > EMPTY_QUEUE;
+		let is_syncing = !*self.is_idle.lock();
+
+		is_verifying || is_syncing
 	}

 }
--- a/ethstore/Cargo.toml
+++ b/ethstore/Cargo.toml
@@ -19,7 +19,7 @@ parking_lot = "0.6"
 parity-crypto = "0.1"
 ethereum-types = "0.4"
 dir = { path = "../util/dir" }
-smallvec = "0.4"
+smallvec = "0.6"
 parity-wordlist = "1.0"
 tempdir = "0.3"

--- a/miner/src/pool/tests/mod.rs
+++ b/miner/src/pool/tests/mod.rs
@@ -76,6 +76,7 @@ fn should_return_correct_nonces_when_dropped_because_of_limit() {
 	// when
 	let tx1 = Tx::gas_price(2).signed();
 	let tx2 = Tx::gas_price(2).signed();
+	let sender = tx2.sender();
 	let tx3 = Tx::gas_price(1).signed();
 	let tx4 = Tx::gas_price(3).signed();
 	let res = txq.import(TestClient::new(), vec![tx1, tx2].retracted());
@@ -90,7 +91,8 @@ fn should_return_correct_nonces_when_dropped_because_of_limit() {
 			   Ok(())
 	]);
 	assert_eq!(txq.status().status.transaction_count, 3);
-	// First inserted transacton got dropped because of limit
+	// tx2 transacton got dropped because of limit
+	// tx1 and tx1' are kept, because they have lower insertion_ids so they are preferred.
 	assert_eq!(txq.next_nonce(TestClient::new(), &sender), None);
 }

--- a/parity/informant.rs
+++ b/parity/informant.rs
@@ -184,7 +184,7 @@ impl InformantData for LightNodeInformantData {
 	fn executes_transactions(&self) -> bool { false }

 	fn is_major_importing(&self) -> bool {
-		self.sync.is_major_importing_no_sync()
+		self.sync.is_major_importing()
 	}

 	fn report(&self) -> Report {
--- a/parity/run.rs
+++ b/parity/run.rs
@@ -396,11 +396,6 @@ fn execute_impl<Cr, Rr>(cmd: RunCmd, logger: Arc<RotatingLogger>, on_client_rq:
 	// create dirs used by parity
 	cmd.dirs.create_dirs(cmd.acc_conf.unlocked_accounts.len() == 0, cmd.secretstore_conf.enabled)?;

-	// run in daemon mode
-	if let Some(pid_file) = cmd.daemon {
-		daemonize(pid_file)?;
-	}
-
 	//print out running parity environment
 	print_running_environment(&spec.data_dir, &cmd.dirs, &db_dirs);

@@ -800,6 +795,12 @@ fn execute_impl<Cr, Rr>(cmd: RunCmd, logger: Arc<RotatingLogger>, on_client_rq:
 	client.set_exit_handler(on_client_rq);
 	updater.set_exit_handler(on_updater_rq);

+	// run in daemon mode
+	if let Some(pid_file) = cmd.daemon {
+		info!("Running as a daemon process!");
+		daemonize(pid_file)?;
+	}
+
 	Ok(RunningClient {
 		inner: RunningClientInner::Full {
 			rpc: rpc_direct,
--- a/rpc/src/tests/ws.rs
+++ b/rpc/src/tests/ws.rs
@@ -20,7 +20,6 @@ use std::sync::Arc;

 use devtools::http_client;
 use jsonrpc_core::MetaIoHandler;
-use rand;
 use ws;

 use v1::{extractors, informant};
@@ -28,8 +27,7 @@ use tests::helpers::{GuardedAuthCodes, Server};

 /// Setup a mock signer for tests
 pub fn serve() -> (Server<ws::Server>, usize, GuardedAuthCodes) {
-	let port = 35000 + rand::random::<usize>() % 10000;
-	let address = format!("127.0.0.1:{}", port).parse().unwrap();
+	let address = "127.0.0.1:0".parse().unwrap();
 	let io = MetaIoHandler::default();
 	let authcodes = GuardedAuthCodes::new();
 	let stats = Arc::new(informant::RpcStats::default());
@@ -45,6 +43,7 @@ pub fn serve() -> (Server<ws::Server>, usize, GuardedAuthCodes) {
 		extractors::WsExtractor::new(Some(&authcodes.path)),
 		extractors::WsStats::new(stats),
 	).unwrap());
+	let port = res.addr().port() as usize;

 	(res, port, authcodes)
 }
--- a/rpc/src/v1/helpers/light_fetch.rs
+++ b/rpc/src/v1/helpers/light_fetch.rs
@@ -24,6 +24,7 @@ use ethcore::encoded;
 use ethcore::filter::Filter as EthcoreFilter;
 use ethcore::ids::BlockId;
 use ethcore::receipt::Receipt;
+use ethcore::executed::ExecutionError;

 use jsonrpc_core::{Result, Error};
 use jsonrpc_core::futures::{future, Future};
@@ -190,8 +191,8 @@ impl LightFetch {
 	/// Helper for getting proved execution.
 	pub fn proved_read_only_execution(&self, req: CallRequest, num: Trailing<BlockNumber>) -> impl Future<Item = ExecutionResult, Error = Error> + Send {
 		const DEFAULT_GAS_PRICE: u64 = 21_000;
-		// starting gas when gas not provided.
-		const START_GAS: u64 = 50_000;
+		// (21000 G_transaction + 32000 G_create + some marginal to allow a few operations)
+		const START_GAS: u64 = 60_000;

 		let (sync, on_demand, client) = (self.sync.clone(), self.on_demand.clone(), self.client.clone());
 		let req: CallRequestHelper = req.into();
@@ -597,28 +598,41 @@ struct ExecuteParams {
 	sync: Arc<LightSync>,
 }

-// has a peer execute the transaction with given params. If `gas_known` is false,
-// this will double the gas on each `OutOfGas` error.
+// Has a peer execute the transaction with given params. If `gas_known` is false, this will set the `gas value` to the
+// `required gas value` unless it exceeds the block gas limit
 fn execute_read_only_tx(gas_known: bool, params: ExecuteParams) -> impl Future<Item = ExecutionResult, Error = Error> + Send {
 	if !gas_known {
 		Box::new(future::loop_fn(params, |mut params| {
 			execute_read_only_tx(true, params.clone()).and_then(move |res| {
 				match res {
 					Ok(executed) => {
-						// TODO: how to distinguish between actual OOG and
-						// exception?
-						if executed.exception.is_some() {
-							let old_gas = params.tx.gas;
-							params.tx.gas = params.tx.gas * 2u32;
-							if params.tx.gas > params.hdr.gas_limit() {
-								params.tx.gas = old_gas;
+						// `OutOfGas` exception, try double the gas
+						if let Some(vm::Error::OutOfGas) = executed.exception {
+							// block gas limit already tried, regard as an error and don't retry
+							if params.tx.gas >= params.hdr.gas_limit() {
+								trace!(target: "light_fetch", "OutOutGas exception received, gas increase: failed");
 							} else {
+								params.tx.gas = cmp::min(params.tx.gas * 2_u32, params.hdr.gas_limit());
+								trace!(target: "light_fetch", "OutOutGas exception received, gas increased to {}",
+									   params.tx.gas);
 								return Ok(future::Loop::Continue(params))
 							}
 						}
-
 						Ok(future::Loop::Break(Ok(executed)))
 					}
+					Err(ExecutionError::NotEnoughBaseGas { required, got }) => {
+						trace!(target: "light_fetch", "Not enough start gas provided required: {}, got: {}",
+							   required, got);
+						if required <= params.hdr.gas_limit() {
+							params.tx.gas = required;
+							return Ok(future::Loop::Continue(params))
+						} else {
+							warn!(target: "light_fetch",
+								  "Required gas is bigger than block header's gas dropping the request");
+							Ok(future::Loop::Break(Err(ExecutionError::NotEnoughBaseGas { required, got })))
+						}
+					}
+					// Non-recoverable execution error
 					failed => Ok(future::Loop::Break(failed)),
 				}
 			})
--- a/1
+++ b/1
@@ -1 +0,0 @@
-stable
--- a/scripts/docker/hub/Dockerfile
+++ b/scripts/docker/hub/Dockerfile
@@ -5,7 +5,7 @@ ARG TARGET
 ENV TARGET ${TARGET}

 # install tools and dependencies
-RUN apt update && apt install -y --no-install-recommends openssl libudev-dev file
+RUN apt update && apt install -y --no-install-recommends openssl libudev-dev file curl jq

 # show backtraces
 ENV RUST_BACKTRACE 1
@@ -18,19 +18,19 @@ RUN rm -rf /tmp/* /var/tmp/* /var/lib/apt/lists/*
 RUN groupadd -g 1000 parity \
  && useradd -m -u 1000 -g parity -s /bin/sh parity

-USER parity
-
-WORKDIR /home/parity
-
-ENV PATH "~/bin:${PATH}"

 #add TARGET to docker image
-COPY artifacts/x86_64-unknown-linux-gnu/$TARGET ./bin/$TARGET
+COPY artifacts/x86_64-unknown-linux-gnu/$TARGET /bin/$TARGET

 # Build a shell script because the ENTRYPOINT command doesn't like using ENV
 RUN echo "#!/bin/bash \n ${TARGET} \$@" > ./entrypoint.sh
 RUN chmod +x ./entrypoint.sh

+COPY scripts/docker/hub/check_sync.sh /check_sync.sh
+
+# switch to user parity here
+USER parity
+
 # setup ENTRYPOINT
 EXPOSE 5001 8080 8082 8083 8545 8546 8180 30303/tcp 30303/udp
 ENTRYPOINT ["./entrypoint.sh"]
--- a/scripts/docker/hub/check_sync.sh
+++ b/scripts/docker/hub/check_sync.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+# checks if parity has a fully synced blockchain
+
+ETH_SYNCING=$(curl -X POST --data '{"jsonrpc":"2.0","method":"eth_syncing","params":[],"id":1}' http://localhost:8545 -H 'Content-Type: application/json')
+RESULT=$(echo "$ETH_SYNCING" | jq -r .result)
+
+if [ "$RESULT" == "false" ]; then
+  echo "Parity is ready to start accepting traffic"
+  exit 0
+else
+  echo "Parity is still syncing the blockchain"
+  exit 1
+fi
--- a/scripts/gitlab/build-unix.sh
+++ b/scripts/gitlab/build-unix.sh
@@ -6,18 +6,23 @@ set -u # treat unset variables as error
 echo "__________Show ENVIROMENT__________"
 echo "CI_SERVER_NAME:   " $CI_SERVER_NAME
 echo "CARGO_HOME:       " $CARGO_HOME
-echo "BUILD_TARGET:     " $BUILD_TARGET
-echo "BUILD_ARCH:       " $BUILD_ARCH
 echo "CARGO_TARGET:     " $CARGO_TARGET
 echo "CC:               " $CC
 echo "CXX:              " $CXX

 echo "__________CARGO CONFIG__________"
-mkdir -p .cargo
-rm -f .cargo/config
-echo "[target.$CARGO_TARGET]" >> .cargo/config
-echo "linker= \"$CC\"" >> .cargo/config
-cat .cargo/config
+if [ "${CARGO_TARGET}" = "armv7-linux-androideabi" ]
+then
+  # use build container's cargo config
+  cat /.cargo/config
+else
+  mkdir -p .cargo
+  rm -f .cargo/config
+  echo "[target.$CARGO_TARGET]" >> .cargo/config
+  echo "linker= \"$CC\"" >> .cargo/config
+  cat .cargo/config
+fi
+

 echo "_____ Building target: "$CARGO_TARGET" _____"
 time cargo build --target $CARGO_TARGET --release --features final
@@ -32,15 +37,31 @@ mkdir -p artifacts
 cd artifacts
 mkdir -p $CARGO_TARGET
 cd $CARGO_TARGET
-cp ../../target/$CARGO_TARGET/release/parity ./parity
-cp ../../target/$CARGO_TARGET/release/parity-evm ./parity-evm
-cp ../../target/$CARGO_TARGET/release/ethstore ./ethstore
-cp ../../target/$CARGO_TARGET/release/ethkey ./ethkey
-cp ../../target/$CARGO_TARGET/release/whisper ./whisper
-strip -v ./*
+cp -v ../../target/$CARGO_TARGET/release/parity ./parity
+cp -v ../../target/$CARGO_TARGET/release/parity-evm ./parity-evm
+cp -v ../../target/$CARGO_TARGET/release/ethstore ./ethstore
+cp -v ../../target/$CARGO_TARGET/release/ethkey ./ethkey
+cp -v ../../target/$CARGO_TARGET/release/whisper ./whisper
+
+
+# stripping can also be done on release build time
+# export RUSTFLAGS="${RUSTFLAGS} -C link-arg=-s"
+if [ "${CARGO_TARGET}" = "armv7-linux-androideabi" ]
+then
+  arm-linux-androideabi-strip -v ./*
+else
+  strip -v ./*
+fi
+
 echo "_____ Calculating checksums _____"
 for binary in $(ls)
 do
  rhash --sha256 $binary -o $binary.sha256
-  ./parity tools hash $binary > $binary.sha3
+  if [ "${CARGO_TARGET}" = "armv7-linux-androideabi" ]
+  then
+    echo "> ${binary} cannot be hashed with cross-compiled binary"
+  else
+    ./parity tools hash $binary > $binary.sha3
+  fi
 done
+
--- a/scripts/gitlab/build-windows.sh
+++ b/scripts/gitlab/build-windows.sh
@@ -8,8 +8,6 @@ set LIB="C:\vs2015\VC\lib;C:\Program Files (x86)\Windows Kits\10\Lib\10.0.10240.
 echo "__________Show ENVIROMENT__________"
 echo "CI_SERVER_NAME:   " $CI_SERVER_NAME
 echo "CARGO_HOME:       " $CARGO_HOME
-echo "BUILD_TARGET:     " $BUILD_TARGET
-echo "BUILD_ARCH:       " $BUILD_ARCH
 echo "CARGO_TARGET:     " $CARGO_TARGET

 echo "_____ Building target: "$CARGO_TARGET" _____"
--- a/scripts/gitlab/cargo-audit.sh
+++ b/scripts/gitlab/cargo-audit.sh
@@ -3,5 +3,5 @@
 set -e # fail on any error
 set -u # treat unset variables as error

-CARGO_TARGET_DIR=./target cargo +stable install cargo-audit --force
-cargo +stable audit
+cargo install cargo-audit
+cargo audit
--- a/scripts/gitlab/publish-docs.sh
+++ b/scripts/gitlab/publish-docs.sh
--- a/util/version/Cargo.toml
+++ b/util/version/Cargo.toml
@@ -3,14 +3,14 @@
 [package]
 name = "parity-version"
 # NOTE: this value is used for Parity Ethereum version string (via env CARGO_PKG_VERSION)
-version = "2.1.4"
+version = "2.1.7"
 authors = ["Parity Technologies <admin@parity.io>"]
 build = "build.rs"

 [package.metadata]
 # This versions track. Should be changed to `stable` or `beta` when on respective branches.
 # Used by auto-updater and for Parity version string.
-track = "beta"
+track = "stable"

 # Network specific settings, used ONLY by auto-updater.
 # Latest supported fork blocks.
--- a/whisper/Cargo.toml
+++ b/whisper/Cargo.toml
@@ -22,7 +22,7 @@ serde = "1.0"
 serde_derive = "1.0"
 serde_json = "1.0"
 slab = "0.3"
-smallvec = "0.4"
+smallvec = "0.6"
 tiny-keccak = "1.4"

 jsonrpc-core = { git = "https://github.com/paritytech/jsonrpc.git", branch = "parity-1.11" }