Merge branch 'master' into new-ui

2016-07-17 17:41:58 +02:00 · 2016-07-17 17:41:58 +02:00 · a2735308b9
parent e74ab38e29 5ab18d1313
commit a2735308b9
46 changed files with 27555 additions and 303 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@ -21,6 +21,7 @@ dependencies = [
 "ethsync 1.3.0",
 "fdlimit 0.1.0",
 "hyper 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "isatty 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "json-ipc-server 0.2.4 (git+https://github.com/ethcore/json-ipc-server.git)",
 "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
@ -585,6 +586,16 @@ dependencies = [
 "xmltree 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

+[[package]]
+name = "isatty"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "itertools"
 version = "0.4.13"
@ -1067,7 +1078,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "rocksdb"
 version = "0.4.5"
-source = "git+https://github.com/ethcore/rust-rocksdb#6472a9dce16c267a3acec2ee6fd01d1bf8de4913"
+source = "git+https://github.com/ethcore/rust-rocksdb#dd597245bfcb621c6ffc45478e1fda0b05d2f409"
 dependencies = [
 "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
 "rocksdb-sys 0.3.0 (git+https://github.com/ethcore/rust-rocksdb)",
@ -1076,7 +1087,7 @@ dependencies = [
 [[package]]
 name = "rocksdb-sys"
 version = "0.3.0"
-source = "git+https://github.com/ethcore/rust-rocksdb#6472a9dce16c267a3acec2ee6fd01d1bf8de4913"
+source = "git+https://github.com/ethcore/rust-rocksdb#dd597245bfcb621c6ffc45478e1fda0b05d2f409"
 dependencies = [
 "gcc 0.3.28 (registry+https://github.com/rust-lang/crates.io-index)",
 "libc 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
--- a/Cargo.toml
+++ b/Cargo.toml
@ -24,6 +24,7 @@ semver = "0.2"
 ansi_term = "0.7"
 lazy_static = "0.2"
 regex = "0.1"
+isatty = "0.1"
 ctrlc = { git = "https://github.com/ethcore/rust-ctrlc.git" }
 fdlimit = { path = "util/fdlimit" }
 ethcore = { path = "ethcore" }
--- a/appveyor.yml
+++ b/appveyor.yml
@ -18,10 +18,10 @@ branches:
 install:
  - git submodule update --init --recursive
  - ps: Install-Product node 6
-  - ps: Start-FileDownload "https://static.rust-lang.org/dist/rust-1.9.0-x86_64-pc-windows-msvc.exe"
+  - ps: Start-FileDownload "https://static.rust-lang.org/dist/rust-1.10.0-x86_64-pc-windows-msvc.exe"
  - ps: Start-FileDownload "https://github.com/ethcore/win-build/raw/master/SimpleFC.dll" -FileName nsis\SimpleFC.dll
  - ps: Start-FileDownload "https://github.com/ethcore/win-build/raw/master/vc_redist.x64.exe" -FileName nsis\vc_redist.x64.exe
-  - rust-1.9.0-x86_64-pc-windows-msvc.exe /VERYSILENT /NORESTART /DIR="C:\Program Files (x86)\Rust"
+  - rust-1.10.0-x86_64-pc-windows-msvc.exe /VERYSILENT /NORESTART /DIR="C:\Program Files (x86)\Rust"
  - SET PATH=%PATH%;C:\Program Files (x86)\Rust\bin;C:\Program Files (x86)\NSIS;C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A\Bin
  - rustc -V
  - cargo -V
--- a/ethash/src/compute.rs
+++ b/ethash/src/compute.rs
@ -271,11 +271,12 @@ fn hash_compute(light: &Light, full_size: usize, header_hash: &H256, nonce: u64)

 		let page_size = 4 * MIX_WORDS;
 		let num_full_pages = (full_size / page_size) as u32;
+		let cache: &[Node] = &light.cache;  // deref once for better performance

 		for i in 0..(ETHASH_ACCESSES as u32) {
 			let index = fnv_hash(f_mix.get_unchecked(0).as_words().get_unchecked(0) ^ i, *mix.get_unchecked(0).as_words().get_unchecked((i as usize) % MIX_WORDS)) % num_full_pages;
 			for n in 0..MIX_NODES {
-				let tmp_node = calculate_dag_item(index * MIX_NODES as u32 + n as u32, light);
+				let tmp_node = calculate_dag_item(index * MIX_NODES as u32 + n as u32, cache);
 				for w in 0..NODE_WORDS {
 					*mix.get_unchecked_mut(n).as_words_mut().get_unchecked_mut(w) = fnv_hash(*mix.get_unchecked(n).as_words().get_unchecked(w), *tmp_node.as_words().get_unchecked(w));
 				}
@ -306,18 +307,17 @@ fn hash_compute(light: &Light, full_size: usize, header_hash: &H256, nonce: u64)
 	}
 }

-fn calculate_dag_item(node_index: u32, light: &Light) -> Node {
+fn calculate_dag_item(node_index: u32, cache: &[Node]) -> Node {
 	unsafe {
-		let num_parent_nodes = light.cache.len();
-		let cache_nodes = &light.cache;
-		let init = cache_nodes.get_unchecked(node_index as usize % num_parent_nodes);
+		let num_parent_nodes = cache.len();
+		let init = cache.get_unchecked(node_index as usize % num_parent_nodes);
 		let mut ret = init.clone();
 		*ret.as_words_mut().get_unchecked_mut(0) ^= node_index;
 		sha3::sha3_512(ret.bytes.as_mut_ptr(), ret.bytes.len(), ret.bytes.as_ptr(), ret.bytes.len());

 		for i in 0..ETHASH_DATASET_PARENTS {
 			let parent_index = fnv_hash(node_index ^ i, *ret.as_words().get_unchecked(i as usize % NODE_WORDS)) % num_parent_nodes as u32;
-			let parent = cache_nodes.get_unchecked(parent_index as usize);
+			let parent = cache.get_unchecked(parent_index as usize);
 			for w in 0..NODE_WORDS {
 				*ret.as_words_mut().get_unchecked_mut(w) = fnv_hash(*ret.as_words().get_unchecked(w), *parent.as_words().get_unchecked(w));
 			}
--- a/ethcore/res/ethereum/daohardfork_test.json
+++ b/ethcore/res/ethereum/daohardfork_test.json
@ -0,0 +1,162 @@
+{
+	"name": "DAO hard-fork consensus test",
+	"engine": {
+		"Ethash": {
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"minimumDifficulty": "0x020000",
+				"difficultyBoundDivisor": "0x0800",
+				"durationLimit": "0x0d",
+				"blockReward": "0x4563918244F40000",
+				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
+				"frontierCompatibilityModeLimit": "0x5",
+				"daoHardforkTransition": "0x8",
+				"daoHardforkBeneficiary": "0xbf4ed7b27f1d666546e30d74d50d173d20bca754",
+				"daoHardforkAccounts": [  
+					"0xd4fe7bc31cedb7bfb8a345f31e668033056b2728",
+					"0xb3fb0e5aba0e20e5c49d252dfd30e102b171a425",
+					"0x2c19c7f9ae8b751e37aeb2d93a699722395ae18f",
+					"0xecd135fa4f61a655311e86238c92adcd779555d2",
+					"0x1975bd06d486162d5dc297798dfc41edd5d160a7",
+					"0xa3acf3a1e16b1d7c315e23510fdd7847b48234f6",
+					"0x319f70bab6845585f412ec7724b744fec6095c85",
+					"0x06706dd3f2c9abf0a21ddcc6941d9b86f0596936",
+					"0x5c8536898fbb74fc7445814902fd08422eac56d0",
+					"0x6966ab0d485353095148a2155858910e0965b6f9",
+					"0x779543a0491a837ca36ce8c635d6154e3c4911a6",
+					"0x2a5ed960395e2a49b1c758cef4aa15213cfd874c",
+					"0x5c6e67ccd5849c0d29219c4f95f1a7a93b3f5dc5",
+					"0x9c50426be05db97f5d64fc54bf89eff947f0a321",
+					"0x200450f06520bdd6c527622a273333384d870efb",
+					"0xbe8539bfe837b67d1282b2b1d61c3f723966f049",
+					"0x6b0c4d41ba9ab8d8cfb5d379c69a612f2ced8ecb",
+					"0xf1385fb24aad0cd7432824085e42aff90886fef5",
+					"0xd1ac8b1ef1b69ff51d1d401a476e7e612414f091",
+					"0x8163e7fb499e90f8544ea62bbf80d21cd26d9efd",
+					"0x51e0ddd9998364a2eb38588679f0d2c42653e4a6",
+					"0x627a0a960c079c21c34f7612d5d230e01b4ad4c7",
+					"0xf0b1aa0eb660754448a7937c022e30aa692fe0c5",
+					"0x24c4d950dfd4dd1902bbed3508144a54542bba94",
+					"0x9f27daea7aca0aa0446220b98d028715e3bc803d",
+					"0xa5dc5acd6a7968a4554d89d65e59b7fd3bff0f90",
+					"0xd9aef3a1e38a39c16b31d1ace71bca8ef58d315b",
+					"0x63ed5a272de2f6d968408b4acb9024f4cc208ebf",
+					"0x6f6704e5a10332af6672e50b3d9754dc460dfa4d",
+					"0x77ca7b50b6cd7e2f3fa008e24ab793fd56cb15f6",
+					"0x492ea3bb0f3315521c31f273e565b868fc090f17",
+					"0x0ff30d6de14a8224aa97b78aea5388d1c51c1f00",
+					"0x9ea779f907f0b315b364b0cfc39a0fde5b02a416",
+					"0xceaeb481747ca6c540a000c1f3641f8cef161fa7",
+					"0xcc34673c6c40e791051898567a1222daf90be287",
+					"0x579a80d909f346fbfb1189493f521d7f48d52238",
+					"0xe308bd1ac5fda103967359b2712dd89deffb7973",
+					"0x4cb31628079fb14e4bc3cd5e30c2f7489b00960c",
+					"0xac1ecab32727358dba8962a0f3b261731aad9723",
+					"0x4fd6ace747f06ece9c49699c7cabc62d02211f75",
+					"0x440c59b325d2997a134c2c7c60a8c61611212bad",
+					"0x4486a3d68fac6967006d7a517b889fd3f98c102b",
+					"0x9c15b54878ba618f494b38f0ae7443db6af648ba",
+					"0x27b137a85656544b1ccb5a0f2e561a5703c6a68f",
+					"0x21c7fdb9ed8d291d79ffd82eb2c4356ec0d81241",
+					"0x23b75c2f6791eef49c69684db4c6c1f93bf49a50",
+					"0x1ca6abd14d30affe533b24d7a21bff4c2d5e1f3b",
+					"0xb9637156d330c0d605a791f1c31ba5890582fe1c",
+					"0x6131c42fa982e56929107413a9d526fd99405560",
+					"0x1591fc0f688c81fbeb17f5426a162a7024d430c2",
+					"0x542a9515200d14b68e934e9830d91645a980dd7a",
+					"0xc4bbd073882dd2add2424cf47d35213405b01324",
+					"0x782495b7b3355efb2833d56ecb34dc22ad7dfcc4",
+					"0x58b95c9a9d5d26825e70a82b6adb139d3fd829eb",
+					"0x3ba4d81db016dc2890c81f3acec2454bff5aada5",
+					"0xb52042c8ca3f8aa246fa79c3feaa3d959347c0ab",
+					"0xe4ae1efdfc53b73893af49113d8694a057b9c0d1",
+					"0x3c02a7bc0391e86d91b7d144e61c2c01a25a79c5",
+					"0x0737a6b837f97f46ebade41b9bc3e1c509c85c53",
+					"0x97f43a37f595ab5dd318fb46e7a155eae057317a",
+					"0x52c5317c848ba20c7504cb2c8052abd1fde29d03",
+					"0x4863226780fe7c0356454236d3b1c8792785748d",
+					"0x5d2b2e6fcbe3b11d26b525e085ff818dae332479",
+					"0x5f9f3392e9f62f63b8eac0beb55541fc8627f42c",
+					"0x057b56736d32b86616a10f619859c6cd6f59092a",
+					"0x9aa008f65de0b923a2a4f02012ad034a5e2e2192",
+					"0x304a554a310c7e546dfe434669c62820b7d83490",
+					"0x914d1b8b43e92723e64fd0a06f5bdb8dd9b10c79",
+					"0x4deb0033bb26bc534b197e61d19e0733e5679784",
+					"0x07f5c1e1bc2c93e0402f23341973a0e043f7bf8a",
+					"0x35a051a0010aba705c9008d7a7eff6fb88f6ea7b",
+					"0x4fa802324e929786dbda3b8820dc7834e9134a2a",
+					"0x9da397b9e80755301a3b32173283a91c0ef6c87e",
+					"0x8d9edb3054ce5c5774a420ac37ebae0ac02343c6",
+					"0x0101f3be8ebb4bbd39a2e3b9a3639d4259832fd9",
+					"0x5dc28b15dffed94048d73806ce4b7a4612a1d48f",
+					"0xbcf899e6c7d9d5a215ab1e3444c86806fa854c76",
+					"0x12e626b0eebfe86a56d633b9864e389b45dcb260",
+					"0xa2f1ccba9395d7fcb155bba8bc92db9bafaeade7",
+					"0xec8e57756626fdc07c63ad2eafbd28d08e7b0ca5",
+					"0xd164b088bd9108b60d0ca3751da4bceb207b0782",
+					"0x6231b6d0d5e77fe001c2a460bd9584fee60d409b",
+					"0x1cba23d343a983e9b5cfd19496b9a9701ada385f",
+					"0xa82f360a8d3455c5c41366975bde739c37bfeb8a",
+					"0x9fcd2deaff372a39cc679d5c5e4de7bafb0b1339",
+					"0x005f5cee7a43331d5a3d3eec71305925a62f34b6",
+					"0x0e0da70933f4c7849fc0d203f5d1d43b9ae4532d",
+					"0xd131637d5275fd1a68a3200f4ad25c71a2a9522e",
+					"0xbc07118b9ac290e4622f5e77a0853539789effbe",
+					"0x47e7aa56d6bdf3f36be34619660de61275420af8",
+					"0xacd87e28b0c9d1254e868b81cba4cc20d9a32225",
+					"0xadf80daec7ba8dcf15392f1ac611fff65d94f880",
+					"0x5524c55fb03cf21f549444ccbecb664d0acad706",
+					"0x40b803a9abce16f50f36a77ba41180eb90023925",
+					"0xfe24cdd8648121a43a7c86d289be4dd2951ed49f",
+					"0x17802f43a0137c506ba92291391a8a8f207f487d",
+					"0x253488078a4edf4d6f42f113d1e62836a942cf1a",
+					"0x86af3e9626fce1957c82e88cbf04ddf3a2ed7915",
+					"0xb136707642a4ea12fb4bae820f03d2562ebff487",
+					"0xdbe9b615a3ae8709af8b93336ce9b477e4ac0940",
+					"0xf14c14075d6c4ed84b86798af0956deef67365b5",
+					"0xca544e5c4687d109611d0f8f928b53a25af72448",
+					"0xaeeb8ff27288bdabc0fa5ebb731b6f409507516c",
+					"0xcbb9d3703e651b0d496cdefb8b92c25aeb2171f7",
+					"0x6d87578288b6cb5549d5076a207456a1f6a63dc0",
+					"0xb2c6f0dfbb716ac562e2d85d6cb2f8d5ee87603e",
+					"0xaccc230e8a6e5be9160b8cdf2864dd2a001c28b6",
+					"0x2b3455ec7fedf16e646268bf88846bd7a2319bb2",
+					"0x4613f3bca5c44ea06337a9e439fbc6d42e501d0a",
+					"0xd343b217de44030afaa275f54d31a9317c7f441e",
+					"0x84ef4b2357079cd7a7c69fd7a37cd0609a679106",
+					"0xda2fef9e4a3230988ff17df2165440f37e8b1708",
+					"0xf4c64518ea10f995918a454158c6b61407ea345c",
+					"0x7602b46df5390e432ef1c307d4f2c9ff6d65cc97",
+					"0xbb9bc244d798123fde783fcc1c72d3bb8c189413",
+					"0x807640a13483f8ac783c557fcdf27be11ea4ac7a"
+				]
+			}
+		}
+	},
+	"params": {
+		"accountStartNonce": "0x00",
+		"maximumExtraDataSize": "0x20",
+		"minGasLimit": "0x1388",
+		"networkID" : "0x1"
+	},
+	"genesis": {
+		"seal": {
+			"ethereum": {
+				"nonce": "0x0000000000000042",
+				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
+			}
+		},
+		"difficulty": "0x400000000",
+		"author": "0x0000000000000000000000000000000000000000",
+		"timestamp": "0x00",
+		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+		"extraData": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",
+		"gasLimit": "0x1388"
+	},
+	"accounts": {
+		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
+		"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
+		"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
+		"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } }
+	}
+}
--- a/ethcore/res/ethereum/frontier-dogmatic.json
+++ b/ethcore/res/ethereum/frontier-dogmatic.json
--- a/ethcore/res/ethereum/frontier.json
+++ b/ethcore/res/ethereum/frontier.json
@ -9,7 +9,127 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0x118c30"
+				"frontierCompatibilityModeLimit": "0x118c30",
+				"daoHardforkTransition": "0x1d4c00",
+				"daoHardforkBeneficiary": "0xbf4ed7b27f1d666546e30d74d50d173d20bca754",
+				"daoHardforkAccounts": [  
+					"0xd4fe7bc31cedb7bfb8a345f31e668033056b2728",
+					"0xb3fb0e5aba0e20e5c49d252dfd30e102b171a425",
+					"0x2c19c7f9ae8b751e37aeb2d93a699722395ae18f",
+					"0xecd135fa4f61a655311e86238c92adcd779555d2",
+					"0x1975bd06d486162d5dc297798dfc41edd5d160a7",
+					"0xa3acf3a1e16b1d7c315e23510fdd7847b48234f6",
+					"0x319f70bab6845585f412ec7724b744fec6095c85",
+					"0x06706dd3f2c9abf0a21ddcc6941d9b86f0596936",
+					"0x5c8536898fbb74fc7445814902fd08422eac56d0",
+					"0x6966ab0d485353095148a2155858910e0965b6f9",
+					"0x779543a0491a837ca36ce8c635d6154e3c4911a6",
+					"0x2a5ed960395e2a49b1c758cef4aa15213cfd874c",
+					"0x5c6e67ccd5849c0d29219c4f95f1a7a93b3f5dc5",
+					"0x9c50426be05db97f5d64fc54bf89eff947f0a321",
+					"0x200450f06520bdd6c527622a273333384d870efb",
+					"0xbe8539bfe837b67d1282b2b1d61c3f723966f049",
+					"0x6b0c4d41ba9ab8d8cfb5d379c69a612f2ced8ecb",
+					"0xf1385fb24aad0cd7432824085e42aff90886fef5",
+					"0xd1ac8b1ef1b69ff51d1d401a476e7e612414f091",
+					"0x8163e7fb499e90f8544ea62bbf80d21cd26d9efd",
+					"0x51e0ddd9998364a2eb38588679f0d2c42653e4a6",
+					"0x627a0a960c079c21c34f7612d5d230e01b4ad4c7",
+					"0xf0b1aa0eb660754448a7937c022e30aa692fe0c5",
+					"0x24c4d950dfd4dd1902bbed3508144a54542bba94",
+					"0x9f27daea7aca0aa0446220b98d028715e3bc803d",
+					"0xa5dc5acd6a7968a4554d89d65e59b7fd3bff0f90",
+					"0xd9aef3a1e38a39c16b31d1ace71bca8ef58d315b",
+					"0x63ed5a272de2f6d968408b4acb9024f4cc208ebf",
+					"0x6f6704e5a10332af6672e50b3d9754dc460dfa4d",
+					"0x77ca7b50b6cd7e2f3fa008e24ab793fd56cb15f6",
+					"0x492ea3bb0f3315521c31f273e565b868fc090f17",
+					"0x0ff30d6de14a8224aa97b78aea5388d1c51c1f00",
+					"0x9ea779f907f0b315b364b0cfc39a0fde5b02a416",
+					"0xceaeb481747ca6c540a000c1f3641f8cef161fa7",
+					"0xcc34673c6c40e791051898567a1222daf90be287",
+					"0x579a80d909f346fbfb1189493f521d7f48d52238",
+					"0xe308bd1ac5fda103967359b2712dd89deffb7973",
+					"0x4cb31628079fb14e4bc3cd5e30c2f7489b00960c",
+					"0xac1ecab32727358dba8962a0f3b261731aad9723",
+					"0x4fd6ace747f06ece9c49699c7cabc62d02211f75",
+					"0x440c59b325d2997a134c2c7c60a8c61611212bad",
+					"0x4486a3d68fac6967006d7a517b889fd3f98c102b",
+					"0x9c15b54878ba618f494b38f0ae7443db6af648ba",
+					"0x27b137a85656544b1ccb5a0f2e561a5703c6a68f",
+					"0x21c7fdb9ed8d291d79ffd82eb2c4356ec0d81241",
+					"0x23b75c2f6791eef49c69684db4c6c1f93bf49a50",
+					"0x1ca6abd14d30affe533b24d7a21bff4c2d5e1f3b",
+					"0xb9637156d330c0d605a791f1c31ba5890582fe1c",
+					"0x6131c42fa982e56929107413a9d526fd99405560",
+					"0x1591fc0f688c81fbeb17f5426a162a7024d430c2",
+					"0x542a9515200d14b68e934e9830d91645a980dd7a",
+					"0xc4bbd073882dd2add2424cf47d35213405b01324",
+					"0x782495b7b3355efb2833d56ecb34dc22ad7dfcc4",
+					"0x58b95c9a9d5d26825e70a82b6adb139d3fd829eb",
+					"0x3ba4d81db016dc2890c81f3acec2454bff5aada5",
+					"0xb52042c8ca3f8aa246fa79c3feaa3d959347c0ab",
+					"0xe4ae1efdfc53b73893af49113d8694a057b9c0d1",
+					"0x3c02a7bc0391e86d91b7d144e61c2c01a25a79c5",
+					"0x0737a6b837f97f46ebade41b9bc3e1c509c85c53",
+					"0x97f43a37f595ab5dd318fb46e7a155eae057317a",
+					"0x52c5317c848ba20c7504cb2c8052abd1fde29d03",
+					"0x4863226780fe7c0356454236d3b1c8792785748d",
+					"0x5d2b2e6fcbe3b11d26b525e085ff818dae332479",
+					"0x5f9f3392e9f62f63b8eac0beb55541fc8627f42c",
+					"0x057b56736d32b86616a10f619859c6cd6f59092a",
+					"0x9aa008f65de0b923a2a4f02012ad034a5e2e2192",
+					"0x304a554a310c7e546dfe434669c62820b7d83490",
+					"0x914d1b8b43e92723e64fd0a06f5bdb8dd9b10c79",
+					"0x4deb0033bb26bc534b197e61d19e0733e5679784",
+					"0x07f5c1e1bc2c93e0402f23341973a0e043f7bf8a",
+					"0x35a051a0010aba705c9008d7a7eff6fb88f6ea7b",
+					"0x4fa802324e929786dbda3b8820dc7834e9134a2a",
+					"0x9da397b9e80755301a3b32173283a91c0ef6c87e",
+					"0x8d9edb3054ce5c5774a420ac37ebae0ac02343c6",
+					"0x0101f3be8ebb4bbd39a2e3b9a3639d4259832fd9",
+					"0x5dc28b15dffed94048d73806ce4b7a4612a1d48f",
+					"0xbcf899e6c7d9d5a215ab1e3444c86806fa854c76",
+					"0x12e626b0eebfe86a56d633b9864e389b45dcb260",
+					"0xa2f1ccba9395d7fcb155bba8bc92db9bafaeade7",
+					"0xec8e57756626fdc07c63ad2eafbd28d08e7b0ca5",
+					"0xd164b088bd9108b60d0ca3751da4bceb207b0782",
+					"0x6231b6d0d5e77fe001c2a460bd9584fee60d409b",
+					"0x1cba23d343a983e9b5cfd19496b9a9701ada385f",
+					"0xa82f360a8d3455c5c41366975bde739c37bfeb8a",
+					"0x9fcd2deaff372a39cc679d5c5e4de7bafb0b1339",
+					"0x005f5cee7a43331d5a3d3eec71305925a62f34b6",
+					"0x0e0da70933f4c7849fc0d203f5d1d43b9ae4532d",
+					"0xd131637d5275fd1a68a3200f4ad25c71a2a9522e",
+					"0xbc07118b9ac290e4622f5e77a0853539789effbe",
+					"0x47e7aa56d6bdf3f36be34619660de61275420af8",
+					"0xacd87e28b0c9d1254e868b81cba4cc20d9a32225",
+					"0xadf80daec7ba8dcf15392f1ac611fff65d94f880",
+					"0x5524c55fb03cf21f549444ccbecb664d0acad706",
+					"0x40b803a9abce16f50f36a77ba41180eb90023925",
+					"0xfe24cdd8648121a43a7c86d289be4dd2951ed49f",
+					"0x17802f43a0137c506ba92291391a8a8f207f487d",
+					"0x253488078a4edf4d6f42f113d1e62836a942cf1a",
+					"0x86af3e9626fce1957c82e88cbf04ddf3a2ed7915",
+					"0xb136707642a4ea12fb4bae820f03d2562ebff487",
+					"0xdbe9b615a3ae8709af8b93336ce9b477e4ac0940",
+					"0xf14c14075d6c4ed84b86798af0956deef67365b5",
+					"0xca544e5c4687d109611d0f8f928b53a25af72448",
+					"0xaeeb8ff27288bdabc0fa5ebb731b6f409507516c",
+					"0xcbb9d3703e651b0d496cdefb8b92c25aeb2171f7",
+					"0x6d87578288b6cb5549d5076a207456a1f6a63dc0",
+					"0xb2c6f0dfbb716ac562e2d85d6cb2f8d5ee87603e",
+					"0xaccc230e8a6e5be9160b8cdf2864dd2a001c28b6",
+					"0x2b3455ec7fedf16e646268bf88846bd7a2319bb2",
+					"0x4613f3bca5c44ea06337a9e439fbc6d42e501d0a",
+					"0xd343b217de44030afaa275f54d31a9317c7f441e",
+					"0x84ef4b2357079cd7a7c69fd7a37cd0609a679106",
+					"0xda2fef9e4a3230988ff17df2165440f37e8b1708",
+					"0xf4c64518ea10f995918a454158c6b61407ea345c",
+					"0x7602b46df5390e432ef1c307d4f2c9ff6d65cc97",
+					"0xbb9bc244d798123fde783fcc1c72d3bb8c189413",
+					"0x807640a13483f8ac783c557fcdf27be11ea4ac7a"
+				]
 			}
 		}
 	},
--- a/ethcore/res/ethereum/frontier_like_test.json
+++ b/ethcore/res/ethereum/frontier_like_test.json
@ -9,7 +9,127 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0x118c30"
+				"frontierCompatibilityModeLimit": "0x118c30",
+				"daoHardforkTransition": "0x1d4c00",
+				"daoHardforkBeneficiary": "0xbf4ed7b27f1d666546e30d74d50d173d20bca754",
+				"daoHardforkAccounts": [  
+					"0xd4fe7bc31cedb7bfb8a345f31e668033056b2728",
+					"0xb3fb0e5aba0e20e5c49d252dfd30e102b171a425",
+					"0x2c19c7f9ae8b751e37aeb2d93a699722395ae18f",
+					"0xecd135fa4f61a655311e86238c92adcd779555d2",
+					"0x1975bd06d486162d5dc297798dfc41edd5d160a7",
+					"0xa3acf3a1e16b1d7c315e23510fdd7847b48234f6",
+					"0x319f70bab6845585f412ec7724b744fec6095c85",
+					"0x06706dd3f2c9abf0a21ddcc6941d9b86f0596936",
+					"0x5c8536898fbb74fc7445814902fd08422eac56d0",
+					"0x6966ab0d485353095148a2155858910e0965b6f9",
+					"0x779543a0491a837ca36ce8c635d6154e3c4911a6",
+					"0x2a5ed960395e2a49b1c758cef4aa15213cfd874c",
+					"0x5c6e67ccd5849c0d29219c4f95f1a7a93b3f5dc5",
+					"0x9c50426be05db97f5d64fc54bf89eff947f0a321",
+					"0x200450f06520bdd6c527622a273333384d870efb",
+					"0xbe8539bfe837b67d1282b2b1d61c3f723966f049",
+					"0x6b0c4d41ba9ab8d8cfb5d379c69a612f2ced8ecb",
+					"0xf1385fb24aad0cd7432824085e42aff90886fef5",
+					"0xd1ac8b1ef1b69ff51d1d401a476e7e612414f091",
+					"0x8163e7fb499e90f8544ea62bbf80d21cd26d9efd",
+					"0x51e0ddd9998364a2eb38588679f0d2c42653e4a6",
+					"0x627a0a960c079c21c34f7612d5d230e01b4ad4c7",
+					"0xf0b1aa0eb660754448a7937c022e30aa692fe0c5",
+					"0x24c4d950dfd4dd1902bbed3508144a54542bba94",
+					"0x9f27daea7aca0aa0446220b98d028715e3bc803d",
+					"0xa5dc5acd6a7968a4554d89d65e59b7fd3bff0f90",
+					"0xd9aef3a1e38a39c16b31d1ace71bca8ef58d315b",
+					"0x63ed5a272de2f6d968408b4acb9024f4cc208ebf",
+					"0x6f6704e5a10332af6672e50b3d9754dc460dfa4d",
+					"0x77ca7b50b6cd7e2f3fa008e24ab793fd56cb15f6",
+					"0x492ea3bb0f3315521c31f273e565b868fc090f17",
+					"0x0ff30d6de14a8224aa97b78aea5388d1c51c1f00",
+					"0x9ea779f907f0b315b364b0cfc39a0fde5b02a416",
+					"0xceaeb481747ca6c540a000c1f3641f8cef161fa7",
+					"0xcc34673c6c40e791051898567a1222daf90be287",
+					"0x579a80d909f346fbfb1189493f521d7f48d52238",
+					"0xe308bd1ac5fda103967359b2712dd89deffb7973",
+					"0x4cb31628079fb14e4bc3cd5e30c2f7489b00960c",
+					"0xac1ecab32727358dba8962a0f3b261731aad9723",
+					"0x4fd6ace747f06ece9c49699c7cabc62d02211f75",
+					"0x440c59b325d2997a134c2c7c60a8c61611212bad",
+					"0x4486a3d68fac6967006d7a517b889fd3f98c102b",
+					"0x9c15b54878ba618f494b38f0ae7443db6af648ba",
+					"0x27b137a85656544b1ccb5a0f2e561a5703c6a68f",
+					"0x21c7fdb9ed8d291d79ffd82eb2c4356ec0d81241",
+					"0x23b75c2f6791eef49c69684db4c6c1f93bf49a50",
+					"0x1ca6abd14d30affe533b24d7a21bff4c2d5e1f3b",
+					"0xb9637156d330c0d605a791f1c31ba5890582fe1c",
+					"0x6131c42fa982e56929107413a9d526fd99405560",
+					"0x1591fc0f688c81fbeb17f5426a162a7024d430c2",
+					"0x542a9515200d14b68e934e9830d91645a980dd7a",
+					"0xc4bbd073882dd2add2424cf47d35213405b01324",
+					"0x782495b7b3355efb2833d56ecb34dc22ad7dfcc4",
+					"0x58b95c9a9d5d26825e70a82b6adb139d3fd829eb",
+					"0x3ba4d81db016dc2890c81f3acec2454bff5aada5",
+					"0xb52042c8ca3f8aa246fa79c3feaa3d959347c0ab",
+					"0xe4ae1efdfc53b73893af49113d8694a057b9c0d1",
+					"0x3c02a7bc0391e86d91b7d144e61c2c01a25a79c5",
+					"0x0737a6b837f97f46ebade41b9bc3e1c509c85c53",
+					"0x97f43a37f595ab5dd318fb46e7a155eae057317a",
+					"0x52c5317c848ba20c7504cb2c8052abd1fde29d03",
+					"0x4863226780fe7c0356454236d3b1c8792785748d",
+					"0x5d2b2e6fcbe3b11d26b525e085ff818dae332479",
+					"0x5f9f3392e9f62f63b8eac0beb55541fc8627f42c",
+					"0x057b56736d32b86616a10f619859c6cd6f59092a",
+					"0x9aa008f65de0b923a2a4f02012ad034a5e2e2192",
+					"0x304a554a310c7e546dfe434669c62820b7d83490",
+					"0x914d1b8b43e92723e64fd0a06f5bdb8dd9b10c79",
+					"0x4deb0033bb26bc534b197e61d19e0733e5679784",
+					"0x07f5c1e1bc2c93e0402f23341973a0e043f7bf8a",
+					"0x35a051a0010aba705c9008d7a7eff6fb88f6ea7b",
+					"0x4fa802324e929786dbda3b8820dc7834e9134a2a",
+					"0x9da397b9e80755301a3b32173283a91c0ef6c87e",
+					"0x8d9edb3054ce5c5774a420ac37ebae0ac02343c6",
+					"0x0101f3be8ebb4bbd39a2e3b9a3639d4259832fd9",
+					"0x5dc28b15dffed94048d73806ce4b7a4612a1d48f",
+					"0xbcf899e6c7d9d5a215ab1e3444c86806fa854c76",
+					"0x12e626b0eebfe86a56d633b9864e389b45dcb260",
+					"0xa2f1ccba9395d7fcb155bba8bc92db9bafaeade7",
+					"0xec8e57756626fdc07c63ad2eafbd28d08e7b0ca5",
+					"0xd164b088bd9108b60d0ca3751da4bceb207b0782",
+					"0x6231b6d0d5e77fe001c2a460bd9584fee60d409b",
+					"0x1cba23d343a983e9b5cfd19496b9a9701ada385f",
+					"0xa82f360a8d3455c5c41366975bde739c37bfeb8a",
+					"0x9fcd2deaff372a39cc679d5c5e4de7bafb0b1339",
+					"0x005f5cee7a43331d5a3d3eec71305925a62f34b6",
+					"0x0e0da70933f4c7849fc0d203f5d1d43b9ae4532d",
+					"0xd131637d5275fd1a68a3200f4ad25c71a2a9522e",
+					"0xbc07118b9ac290e4622f5e77a0853539789effbe",
+					"0x47e7aa56d6bdf3f36be34619660de61275420af8",
+					"0xacd87e28b0c9d1254e868b81cba4cc20d9a32225",
+					"0xadf80daec7ba8dcf15392f1ac611fff65d94f880",
+					"0x5524c55fb03cf21f549444ccbecb664d0acad706",
+					"0x40b803a9abce16f50f36a77ba41180eb90023925",
+					"0xfe24cdd8648121a43a7c86d289be4dd2951ed49f",
+					"0x17802f43a0137c506ba92291391a8a8f207f487d",
+					"0x253488078a4edf4d6f42f113d1e62836a942cf1a",
+					"0x86af3e9626fce1957c82e88cbf04ddf3a2ed7915",
+					"0xb136707642a4ea12fb4bae820f03d2562ebff487",
+					"0xdbe9b615a3ae8709af8b93336ce9b477e4ac0940",
+					"0xf14c14075d6c4ed84b86798af0956deef67365b5",
+					"0xca544e5c4687d109611d0f8f928b53a25af72448",
+					"0xaeeb8ff27288bdabc0fa5ebb731b6f409507516c",
+					"0xcbb9d3703e651b0d496cdefb8b92c25aeb2171f7",
+					"0x6d87578288b6cb5549d5076a207456a1f6a63dc0",
+					"0xb2c6f0dfbb716ac562e2d85d6cb2f8d5ee87603e",
+					"0xaccc230e8a6e5be9160b8cdf2864dd2a001c28b6",
+					"0x2b3455ec7fedf16e646268bf88846bd7a2319bb2",
+					"0x4613f3bca5c44ea06337a9e439fbc6d42e501d0a",
+					"0xd343b217de44030afaa275f54d31a9317c7f441e",
+					"0x84ef4b2357079cd7a7c69fd7a37cd0609a679106",
+					"0xda2fef9e4a3230988ff17df2165440f37e8b1708",
+					"0xf4c64518ea10f995918a454158c6b61407ea345c",
+					"0x7602b46df5390e432ef1c307d4f2c9ff6d65cc97",
+					"0xbb9bc244d798123fde783fcc1c72d3bb8c189413",
+					"0x807640a13483f8ac783c557fcdf27be11ea4ac7a"
+				]
 			}
 		}
 	},
--- a/ethcore/res/ethereum/frontier_like_test_dao_rescue.json
+++ b/ethcore/res/ethereum/frontier_like_test_dao_rescue.json
@ -1,42 +0,0 @@
-{
-	"name": "Frontier (Test)",
-	"engine": {
-		"Ethash": {
-			"params": {
-				"gasLimitBoundDivisor": "0x0400",
-				"minimumDifficulty": "0x020000",
-				"difficultyBoundDivisor": "0x0800",
-				"durationLimit": "0x0d",
-				"blockReward": "0x4563918244F40000",
-				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0x118c30"
-			}
-		}
-	},
-	"params": {
-		"accountStartNonce": "0x00",
-		"maximumExtraDataSize": "0x20",
-		"minGasLimit": "0x1388",
-		"networkID" : "0x1"
-	},
-	"genesis": {
-		"seal": {
-			"ethereum": {
-				"nonce": "0x0000000000000042",
-				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
-			}
-		},
-		"difficulty": "0x400000000",
-		"author": "0x0000000000000000000000000000000000000000",
-		"timestamp": "0x00",
-		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
-		"extraData": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",
-		"gasLimit": "0x1388"
-	},
-	"accounts": {
-		"0000000000000000000000000000000000000001": { "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
-		"0000000000000000000000000000000000000002": { "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
-		"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
-		"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } }
-	}
-}
--- a/ethcore/res/ethereum/homestead_test.json
+++ b/ethcore/res/ethereum/homestead_test.json
@ -9,7 +9,7 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": 0
+				"frontierCompatibilityModeLimit": "0x0"
 			}
 		}
 	},
--- a/ethcore/res/ethereum/homestead_test_dao_rescue.json
+++ b/ethcore/res/ethereum/homestead_test_dao_rescue.json
@ -1,42 +0,0 @@
-{
-	"name": "Homestead (Test)",
-	"engine": {
-		"Ethash": {
-			"params": {
-				"gasLimitBoundDivisor": "0x0400",
-				"minimumDifficulty": "0x020000",
-				"difficultyBoundDivisor": "0x0800",
-				"durationLimit": "0x0d",
-				"blockReward": "0x4563918244F40000",
-				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": 0
-			}
-		}
-	},
-	"params": {
-		"accountStartNonce": "0x00",
-		"maximumExtraDataSize": "0x20",
-		"minGasLimit": "0x1388",
-		"networkID" : "0x1"
-	},
-	"genesis": {
-		"seal": {
-			"ethereum": {
-				"nonce": "0x0000000000000042",
-				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
-			}
-		},
-		"difficulty": "0x400000000",
-		"author": "0x0000000000000000000000000000000000000000",
-		"timestamp": "0x00",
-		"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
-		"extraData": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",
-		"gasLimit": "0x1388"
-	},
-	"accounts": {
-		"0000000000000000000000000000000000000001": { "balance": "1", "builtin": { "name": "ecrecover", "pricing": { "linear": { "base": 3000, "word": 0 } } } },
-		"0000000000000000000000000000000000000002": { "balance": "1", "builtin": { "name": "sha256", "pricing": { "linear": { "base": 60, "word": 12 } } } },
-		"0000000000000000000000000000000000000003": { "balance": "1", "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
-		"0000000000000000000000000000000000000004": { "balance": "1", "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } }
-	}
-}
--- a/ethcore/res/ethereum/olympic.json
+++ b/ethcore/res/ethereum/olympic.json
@ -8,8 +8,7 @@
 				"difficultyBoundDivisor": "0x0800",
 				"durationLimit": "0x08",
 				"blockReward": "0x14D1120D7B160000",
-				"registrar": "5e70c0bbcd5636e0f9f9316e9f8633feb64d4050",
-				"frontierCompatibilityModeLimit": "0xffffffffffffffff"
+				"registrar": "5e70c0bbcd5636e0f9f9316e9f8633feb64d4050"
 			}
 		}
 	},
--- a/ethcore/res/ethereum/tests
+++ b/ethcore/res/ethereum/tests
@ -1 +1 @@
-Subproject commit 99afe8f5aad7bca5d0f1b1685390a4dea32d73c3
+Subproject commit ac5475d676536cb945f98e9ff98384c01abd0599
--- a/ethcore/src/account.rs
+++ b/ethcore/src/account.rs
@ -35,6 +35,8 @@ pub struct Account {
 	code_hash: Option<H256>,
 	// Code cache of the account.
 	code_cache: Bytes,
+	// Account is new or has been modified
+	dirty: bool,
 }

 impl Account {
@ -47,7 +49,8 @@ impl Account {
 			storage_root: SHA3_NULL_RLP,
 			storage_overlay: RefCell::new(storage.into_iter().map(|(k, v)| (k, (Filth::Dirty, v))).collect()),
 			code_hash: Some(code.sha3()),
-			code_cache: code
+			code_cache: code,
+			dirty: true,
 		}
 	}

@ -59,7 +62,8 @@ impl Account {
 			storage_root: SHA3_NULL_RLP,
 			storage_overlay: RefCell::new(pod.storage.into_iter().map(|(k, v)| (k, (Filth::Dirty, v))).collect()),
 			code_hash: Some(pod.code.sha3()),
-			code_cache: pod.code
+			code_cache: pod.code,
+			dirty: true,
 		}
 	}

@ -72,6 +76,7 @@ impl Account {
 			storage_overlay: RefCell::new(HashMap::new()),
 			code_hash: Some(SHA3_EMPTY),
 			code_cache: vec![],
+			dirty: true,
 		}
 	}

@ -85,6 +90,7 @@ impl Account {
 			storage_overlay: RefCell::new(HashMap::new()),
 			code_hash: Some(r.val_at(3)),
 			code_cache: vec![],
+			dirty: false,
 		}
 	}

@ -98,6 +104,7 @@ impl Account {
 			storage_overlay: RefCell::new(HashMap::new()),
 			code_hash: None,
 			code_cache: vec![],
+			dirty: true,
 		}
 	}

@ -106,6 +113,7 @@ impl Account {
 	pub fn init_code(&mut self, code: Bytes) {
 		assert!(self.code_hash.is_none());
 		self.code_cache = code;
+		self.dirty = true;
 	}

 	/// Reset this account's code to the given code.
@ -117,6 +125,7 @@ impl Account {
 	/// Set (and cache) the contents of the trie's storage at `key` to `value`.
 	pub fn set_storage(&mut self, key: H256, value: H256) {
 		self.storage_overlay.borrow_mut().insert(key, (Filth::Dirty, value));
+		self.dirty = true;
 	}

 	/// Get (and cache) the contents of the trie's storage at `key`.
@ -172,6 +181,10 @@ impl Account {
 		!self.code_cache.is_empty() || (self.code_cache.is_empty() && self.code_hash == Some(SHA3_EMPTY))
 	}

+	/// Is this a new or modified account?
+	pub fn is_dirty(&self) -> bool {
+		self.dirty
+	}
 	/// Provide a database to get `code_hash`. Should not be called if it is a contract without code.
 	pub fn cache_code(&mut self, db: &AccountDB) -> bool {
 		// TODO: fill out self.code_cache;
@ -201,16 +214,23 @@ impl Account {
 	pub fn storage_overlay(&self) -> Ref<HashMap<H256, (Filth, H256)>> { self.storage_overlay.borrow() }

 	/// Increment the nonce of the account by one.
-	pub fn inc_nonce(&mut self) { self.nonce = self.nonce + U256::from(1u8); }
+	pub fn inc_nonce(&mut self) {
+		self.nonce = self.nonce + U256::from(1u8);
+		self.dirty = true;
+	}

 	/// Increment the nonce of the account by one.
-	pub fn add_balance(&mut self, x: &U256) { self.balance = self.balance + *x; }
+	pub fn add_balance(&mut self, x: &U256) {
+		self.balance = self.balance + *x;
+		self.dirty = true;
+	}

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

 	/// Commit the `storage_overlay` to the backing DB and update `storage_root`.
--- a/ethcore/src/block.rs
+++ b/ethcore/src/block.rs
@ -494,10 +494,12 @@ pub fn enact(
 		}
 	}

-	let mut b = try!(OpenBlock::new(engine, vm_factory, trie_factory, tracing, db, parent, last_hashes, header.author().clone(), (3141562.into(), 31415620.into()), header.extra_data().clone()));
+	let mut b = try!(OpenBlock::new(engine, vm_factory, trie_factory, tracing, db, parent, last_hashes, Address::new(), (3141562.into(), 31415620.into()), vec![]));
 	b.set_difficulty(*header.difficulty());
 	b.set_gas_limit(*header.gas_limit());
 	b.set_timestamp(header.timestamp());
+	b.set_author(header.author().clone());
+	b.set_extra_data(header.extra_data().clone()).unwrap_or_else(|e| warn!("Couldn't set extradata: {}. Ignoring.", e));
 	for t in transactions { try!(b.push_transaction(t.clone(), None)); }
 	for u in uncles { try!(b.push_uncle(u.clone())); }
 	Ok(b.close_and_lock())
--- a/ethcore/src/blockchain/blockchain.rs
+++ b/ethcore/src/blockchain/blockchain.rs
@ -359,6 +359,12 @@ impl BlockChain {
 		bc
 	}

+	/// Returns true if the given parent block has given child
+	/// (though not necessarily a part of the canon chain).
+	fn is_known_child(&self, parent: &H256, hash: &H256) -> bool {
+		self.extras_db.read_with_cache(&self.block_details, parent).map_or(false, |d| d.children.contains(hash))
+	}
+
 	/// Set the cache configuration.
 	pub fn configure_cache(&self, pref_cache_size: usize, max_cache_size: usize) {
 		self.pref_cache_size.store(pref_cache_size, AtomicOrder::Relaxed);
@ -463,7 +469,7 @@ impl BlockChain {
 		let header = block.header_view();
 		let hash = header.sha3();

-		if self.is_known(&hash) {
+		if self.is_known_child(&header.parent_hash(), &hash) {
 			return ImportRoute::none();
 		}

@ -488,7 +494,6 @@ impl BlockChain {
 	/// Applies extras update.
 	fn apply_update(&self, update: ExtrasUpdate) {
 		let batch = DBTransaction::new();
-		batch.put(b"best", &update.info.hash).unwrap();

 		{
 			for hash in update.block_details.keys().cloned() {
@ -496,29 +501,27 @@ impl BlockChain {
 			}

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

 		{
 			let mut write_receipts = self.block_receipts.write();
-			batch.extend_with_cache(write_receipts.deref_mut(), update.block_receipts, CacheUpdatePolicy::Remove);
+			batch.extend_with_cache(&mut *write_receipts, update.block_receipts, CacheUpdatePolicy::Remove);
 		}

 		{
 			let mut write_blocks_blooms = self.blocks_blooms.write();
-			batch.extend_with_cache(write_blocks_blooms.deref_mut(), update.blocks_blooms, CacheUpdatePolicy::Remove);
+			batch.extend_with_cache(&mut *write_blocks_blooms, update.blocks_blooms, CacheUpdatePolicy::Remove);
 		}

 		// These cached values must be updated last and togeterh
 		{
-			let mut best_block = self.best_block.write();
-			let mut write_hashes = self.block_hashes.write();
-			let mut write_txs = self.transaction_addresses.write();
-
 			// update best block
 			match update.info.location {
 				BlockLocation::Branch => (),
 				_ => {
+					batch.put(b"best", &update.info.hash).unwrap();
+					let mut best_block = self.best_block.write();
 					*best_block = BestBlock {
 						hash: update.info.hash,
 						number: update.info.number,
@ -527,8 +530,11 @@ impl BlockChain {
 				}
 			}

-			batch.extend_with_cache(write_hashes.deref_mut(), update.block_hashes, CacheUpdatePolicy::Remove);
-			batch.extend_with_cache(write_txs.deref_mut(), update.transactions_addresses, CacheUpdatePolicy::Remove);
+			let mut write_hashes = self.block_hashes.write();
+			let mut write_txs = self.transaction_addresses.write();
+
+			batch.extend_with_cache(&mut *write_hashes, update.block_hashes, CacheUpdatePolicy::Remove);
+			batch.extend_with_cache(&mut *write_txs, update.transactions_addresses, CacheUpdatePolicy::Remove);

 			// update extras database
 			self.extras_db.write(batch).unwrap();
@ -1189,4 +1195,31 @@ mod tests {
 		assert_eq!(blocks_b2, vec![2]);
 		assert_eq!(blocks_ba, vec![3]);
 	}
+
+	#[test]
+	fn test_best_block_update() {
+		let mut canon_chain = ChainGenerator::default();
+		let mut finalizer = BlockFinalizer::default();
+		let genesis = canon_chain.generate(&mut finalizer).unwrap();
+
+		let temp = RandomTempPath::new();
+
+		{
+			let bc = BlockChain::new(Config::default(), &genesis, temp.as_path());
+			let uncle = canon_chain.fork(1).generate(&mut finalizer.fork()).unwrap();
+
+			// create a longer fork
+			for _ in 0..5 {
+				let canon_block = canon_chain.generate(&mut finalizer).unwrap();
+				bc.insert_block(&canon_block, vec![]);
+			}
+
+			assert_eq!(bc.best_block_number(), 5);
+			bc.insert_block(&uncle, vec![]);
+		}
+
+		// re-loading the blockchain should load the correct best block.
+		let bc = BlockChain::new(Config::default(), &genesis, temp.as_path());
+		assert_eq!(bc.best_block_number(), 5);
+	}
 }
--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@ -35,7 +35,7 @@ use util::rlp::{RlpStream, Rlp, UntrustedRlp};
 use util::journaldb;
 use util::journaldb::JournalDB;
 use util::kvdb::*;
-use util::{Applyable, Stream, View, PerfTimer, Itertools, Colour};
+use util::{Stream, View, PerfTimer, Itertools};
 use util::{Mutex, RwLock};

 // other
@ -145,6 +145,7 @@ pub struct Client {
 	notify: RwLock<Option<Weak<ChainNotify>>>,
 	queue_transactions: AtomicUsize,
 	previous_enode: Mutex<Option<String>>,
+	last_hashes: RwLock<VecDeque<H256>>,
 }

 const HISTORY: u64 = 1200;
@ -232,6 +233,7 @@ impl Client {
 			notify: RwLock::new(None),
 			queue_transactions: AtomicUsize::new(0),
 			previous_enode: Mutex::new(None),
+			last_hashes: RwLock::new(VecDeque::new()),
 		};
 		Ok(Arc::new(client))
 	}
@ -253,6 +255,14 @@ impl Client {
 	}

 	fn build_last_hashes(&self, parent_hash: H256) -> LastHashes {
+		{
+			let hashes = self.last_hashes.read();
+			if hashes.front().map_or(false, |h| h == &parent_hash) {
+				let mut res = Vec::from(hashes.clone());
+				res.resize(256, H256::default());
+				return res;
+			}
+		}
 		let mut last_hashes = LastHashes::new();
 		last_hashes.resize(256, H256::new());
 		last_hashes[0] = parent_hash;
@ -264,6 +274,8 @@ impl Client {
 				None => break,
 			}
 		}
+		let mut cached_hashes = self.last_hashes.write();
+		*cached_hashes = VecDeque::from(last_hashes.clone());
 		last_hashes
 	}

@ -418,6 +430,7 @@ impl Client {

 	fn commit_block<B>(&self, block: B, hash: &H256, block_data: &[u8]) -> ImportRoute where B: IsBlock + Drain {
 		let number = block.header().number();
+		let parent = block.header().parent_hash().clone();
 		// Are we committing an era?
 		let ancient = if number >= HISTORY {
 			let n = number - HISTORY;
@ -445,9 +458,20 @@ impl Client {
 			enacted: route.enacted.clone(),
 			retracted: route.retracted.len()
 		});
+		self.update_last_hashes(&parent, hash);
 		route
 	}

+	fn update_last_hashes(&self, parent: &H256, hash: &H256) {
+		let mut hashes = self.last_hashes.write();
+		if hashes.front().map_or(false, |h| h == parent) {
+			if hashes.len() > 255 {
+				hashes.pop_back();
+			}
+			hashes.push_front(hash.clone());
+		}
+	}
+
 	/// Import transactions from the IO queue
 	pub fn import_queued_transactions(&self, transactions: &[Bytes]) -> usize {
 		let _timer = PerfTimer::new("import_queued_transactions");
@ -608,18 +632,6 @@ impl Client {
 			}
 		}
 	}
-
-	/// Notify us that the network has been started.
-	pub fn network_started(&self, url: &str) {
-		let mut previous_enode = self.previous_enode.lock();
-		if let Some(ref u) = *previous_enode {
-			if u == url {
-				return;
-			}
-		}
-		*previous_enode = Some(url.into());
-		info!(target: "mode", "Public node URL: {}", url.apply(Colour::White.bold()));
-	}
 }

 #[derive(Ipc)]
@ -687,7 +699,7 @@ impl BlockChainClient for Client {

 	fn block(&self, id: BlockID) -> Option<Bytes> {
 		if let &BlockID::Pending = &id {
-			if let Some(block) = self.miner.pending_block() { 
+			if let Some(block) = self.miner.pending_block() {
 				return Some(block.rlp_bytes(Seal::Without));
 			}
 		}
@ -708,7 +720,7 @@ impl BlockChainClient for Client {
 		if let &BlockID::Pending = &id {
 			if let Some(block) = self.miner.pending_block() {
 				return Some(*block.header.difficulty() + self.block_total_difficulty(BlockID::Latest).expect("blocks in chain have details; qed"));
-			} 
+			}
 		}
 		Self::block_hash(&self.chain, id).and_then(|hash| self.chain.block_details(&hash)).map(|d| d.total_difficulty)
 	}
--- a/ethcore/src/error.rs
+++ b/ethcore/src/error.rs
@ -59,8 +59,6 @@ pub enum TransactionError {
 	},
 	/// Transaction's gas limit (aka gas) is invalid.
 	InvalidGasLimit(OutOfBounds<U256>),
-	/// Transaction is invalid for some other reason.
-	DAORescue,
 }

 impl fmt::Display for TransactionError {
@ -79,7 +77,6 @@ impl fmt::Display for TransactionError {
 			GasLimitExceeded { limit, got } =>
 				format!("Gas limit exceeded. Limit={}, Given={}", limit, got),
 			InvalidGasLimit(ref err) => format!("Invalid gas limit. {}", err),
-			DAORescue => "Transaction is invalid due to the DAO rescue.".into(),
 		};

 		f.write_fmt(format_args!("Transaction error ({})", msg))
--- a/ethcore/src/ethereum/ethash.rs
+++ b/ethcore/src/ethereum/ethash.rs
@ -39,6 +39,12 @@ pub struct EthashParams {
 	pub registrar: Address,
 	/// Homestead transition block number.
 	pub frontier_compatibility_mode_limit: u64,
+	/// DAO hard-fork transition block (X).
+	pub dao_hardfork_transition: u64,
+	/// DAO hard-fork refund contract address (C).
+	pub dao_hardfork_beneficiary: Address,
+	/// DAO hard-fork DAO accounts list (L) 
+	pub dao_hardfork_accounts: Vec<Address>,
 }

 impl From<ethjson::spec::EthashParams> for EthashParams {
@ -49,8 +55,11 @@ impl From<ethjson::spec::EthashParams> for EthashParams {
 			difficulty_bound_divisor: p.difficulty_bound_divisor.into(),
 			duration_limit: p.duration_limit.into(),
 			block_reward: p.block_reward.into(),
-			registrar: p.registrar.into(),
-			frontier_compatibility_mode_limit: p.frontier_compatibility_mode_limit.into(),
+			registrar: p.registrar.map(Into::into).unwrap_or(Address::new()),
+			frontier_compatibility_mode_limit: p.frontier_compatibility_mode_limit.map(Into::into).unwrap_or(0),
+			dao_hardfork_transition: p.dao_hardfork_transition.map(Into::into).unwrap_or(0x7fffffffffffffff),
+			dao_hardfork_beneficiary: p.dao_hardfork_beneficiary.map(Into::into).unwrap_or(Address::new()),
+			dao_hardfork_accounts: p.dao_hardfork_accounts.unwrap_or(vec![]).into_iter().map(Into::into).collect(),
 		}
 	}
 }
@ -119,10 +128,27 @@ impl Engine for Ethash {
 							(header.gas_used * 6.into() / 5.into()) / bound_divisor))
 			}
 		};
+		if header.number >= self.ethash_params.dao_hardfork_transition &&
+			header.number <= self.ethash_params.dao_hardfork_transition + 9 {
+			header.extra_data = b"dao-hard-fork"[..].to_owned();
+		}  
 		header.note_dirty();
 //		info!("ethash: populate_from_parent #{}: difficulty={} and gas_limit={}", header.number, header.difficulty, header.gas_limit);
 	}

+	fn on_new_block(&self, block: &mut ExecutedBlock) {
+		if block.fields().header.number == self.ethash_params.dao_hardfork_transition {
+			// TODO: enable trigger function maybe?
+//			if block.fields().header.gas_limit <= 4_000_000.into() {
+				let mut state = block.fields_mut().state;
+				for child in self.ethash_params.dao_hardfork_accounts.iter() {
+					let b = state.balance(child);
+					state.transfer_balance(child, &self.ethash_params.dao_hardfork_beneficiary, &b);
+				}
+//			}
+		}
+	}
+
 	/// Apply the block reward on finalisation of the block.
 	/// This assumes that all uncles are valid uncles (i.e. of at least one generation before the current).
 	fn on_close_block(&self, block: &mut ExecutedBlock) {
@ -164,6 +190,17 @@ impl Engine for Ethash {
 		if difficulty < header.difficulty {
 			return Err(From::from(BlockError::InvalidProofOfWork(OutOfBounds { min: Some(header.difficulty), max: None, found: difficulty })));
 		}
+
+		if header.number >= self.ethash_params.dao_hardfork_transition &&
+			header.number <= self.ethash_params.dao_hardfork_transition + 9 &&
+			header.extra_data[..] != b"dao-hard-fork"[..] {
+			return Err(From::from(BlockError::ExtraDataOutOfBounds(OutOfBounds { min: None, max: None, found: 0 })));
+		}
+
+		if header.gas_limit > 0x7fffffffffffffffu64.into() {
+			return Err(From::from(BlockError::InvalidGasLimit(OutOfBounds { min: None, max: Some(0x7fffffffffffffffu64.into()), found: header.gas_limit })));
+		}  
+		
 		Ok(())
 	}

--- a/ethcore/src/ethereum/mod.rs
+++ b/ethcore/src/ethereum/mod.rs
@ -37,12 +37,20 @@ pub fn new_frontier() -> Spec {
 	Spec::load(include_bytes!("../../res/ethereum/frontier.json"))
 }

+/// Create a new Frontier mainnet chain spec without the DAO hardfork.
+pub fn new_frontier_dogmatic() -> Spec {
+	Spec::load(include_bytes!("../../res/ethereum/frontier-dogmatic.json"))
+}
+
 /// Create a new Frontier chain spec as though it never changes to Homestead.
 pub fn new_frontier_test() -> Spec { Spec::load(include_bytes!("../../res/ethereum/frontier_test.json")) }

 /// Create a new Homestead chain spec as though it never changed from Frontier.
 pub fn new_homestead_test() -> Spec { Spec::load(include_bytes!("../../res/ethereum/homestead_test.json")) }

+/// Create a new Frontier/Homestead/DAO chain spec with transition points at #5 and #8.
+pub fn new_daohardfork_test() -> Spec { Spec::load(include_bytes!("../../res/ethereum/daohardfork_test.json")) }
+
 /// Create a new Frontier main net chain spec without genesis accounts.
 pub fn new_mainnet_like() -> Spec { Spec::load(include_bytes!("../../res/ethereum/frontier_like_test.json")) }

--- a/ethcore/src/evm/schedule.rs
+++ b/ethcore/src/evm/schedule.rs
@ -80,8 +80,6 @@ pub struct Schedule {
 	pub tx_data_non_zero_gas: usize,
 	/// Gas price for copying memory
 	pub copy_gas: usize,
-	/// DAO Rescue softfork block
-	pub reject_dao_transactions: bool,
 }

 impl Schedule {
@ -128,7 +126,6 @@ impl Schedule {
 			tx_data_zero_gas: 4,
 			tx_data_non_zero_gas: 68,
 			copy_gas: 3,	
-			reject_dao_transactions: false,
 		}
 	}
 }
--- a/ethcore/src/json_tests/chain.rs
+++ b/ethcore/src/json_tests/chain.rs
@ -48,6 +48,7 @@ pub fn json_chain_test(json_data: &[u8], era: ChainEra) -> Vec<String> {
 				let mut spec = match era {
 					ChainEra::Frontier => ethereum::new_frontier_test(),
 					ChainEra::Homestead => ethereum::new_homestead_test(),
+					ChainEra::DaoHardfork => ethereum::new_daohardfork_test(),
 				};
 				spec.set_genesis_state(state);
 				spec.overwrite_genesis_params(genesis);
@ -84,26 +85,43 @@ pub fn json_chain_test(json_data: &[u8], era: ChainEra) -> Vec<String> {
 	failed
 }

-fn do_json_test(json_data: &[u8]) -> Vec<String> {
-	json_chain_test(json_data, ChainEra::Frontier)
+mod frontier_era_tests {
+	use tests::helpers::*;
+	use super::json_chain_test;
+
+	fn do_json_test(json_data: &[u8]) -> Vec<String> {
+		json_chain_test(json_data, ChainEra::Frontier)
+	}
+
+	declare_test!{BlockchainTests_bcBlockGasLimitTest, "BlockchainTests/bcBlockGasLimitTest"}
+	declare_test!{BlockchainTests_bcForkBlockTest, "BlockchainTests/bcForkBlockTest"}
+	declare_test!{BlockchainTests_bcForkStressTest, "BlockchainTests/bcForkStressTest"}
+	declare_test!{BlockchainTests_bcForkUncle, "BlockchainTests/bcForkUncle"}
+	declare_test!{BlockchainTests_bcGasPricerTest, "BlockchainTests/bcGasPricerTest"}
+	declare_test!{BlockchainTests_bcInvalidHeaderTest, "BlockchainTests/bcInvalidHeaderTest"}
+	// TODO [ToDr] Ignored because of incorrect JSON (https://github.com/ethereum/tests/pull/113)
+	declare_test!{ignore => BlockchainTests_bcInvalidRLPTest, "BlockchainTests/bcInvalidRLPTest"}
+	declare_test!{BlockchainTests_bcMultiChainTest, "BlockchainTests/bcMultiChainTest"}
+	declare_test!{BlockchainTests_bcRPC_API_Test, "BlockchainTests/bcRPC_API_Test"}
+	declare_test!{BlockchainTests_bcStateTest, "BlockchainTests/bcStateTest"}
+	declare_test!{BlockchainTests_bcTotalDifficultyTest, "BlockchainTests/bcTotalDifficultyTest"}
+	declare_test!{BlockchainTests_bcUncleHeaderValiditiy, "BlockchainTests/bcUncleHeaderValiditiy"}
+	declare_test!{BlockchainTests_bcUncleTest, "BlockchainTests/bcUncleTest"}
+	declare_test!{BlockchainTests_bcValidBlockTest, "BlockchainTests/bcValidBlockTest"}
+	declare_test!{BlockchainTests_bcWalletTest, "BlockchainTests/bcWalletTest"}
+
+	declare_test!{BlockchainTests_RandomTests_bl10251623GO, "BlockchainTests/RandomTests/bl10251623GO"}
+	declare_test!{BlockchainTests_RandomTests_bl201507071825GO, "BlockchainTests/RandomTests/bl201507071825GO"}
 }

-declare_test!{BlockchainTests_bcBlockGasLimitTest, "BlockchainTests/bcBlockGasLimitTest"}
-declare_test!{BlockchainTests_bcForkBlockTest, "BlockchainTests/bcForkBlockTest"}
-declare_test!{BlockchainTests_bcForkStressTest, "BlockchainTests/bcForkStressTest"}
-declare_test!{BlockchainTests_bcForkUncle, "BlockchainTests/bcForkUncle"}
-declare_test!{BlockchainTests_bcGasPricerTest, "BlockchainTests/bcGasPricerTest"}
-declare_test!{BlockchainTests_bcInvalidHeaderTest, "BlockchainTests/bcInvalidHeaderTest"}
-// TODO [ToDr] Ignored because of incorrect JSON (https://github.com/ethereum/tests/pull/113)
-declare_test!{ignore => BlockchainTests_bcInvalidRLPTest, "BlockchainTests/bcInvalidRLPTest"}
-declare_test!{BlockchainTests_bcMultiChainTest, "BlockchainTests/bcMultiChainTest"}
-declare_test!{BlockchainTests_bcRPC_API_Test, "BlockchainTests/bcRPC_API_Test"}
-declare_test!{BlockchainTests_bcStateTest, "BlockchainTests/bcStateTest"}
-declare_test!{BlockchainTests_bcTotalDifficultyTest, "BlockchainTests/bcTotalDifficultyTest"}
-declare_test!{BlockchainTests_bcUncleHeaderValiditiy, "BlockchainTests/bcUncleHeaderValiditiy"}
-declare_test!{BlockchainTests_bcUncleTest, "BlockchainTests/bcUncleTest"}
-declare_test!{BlockchainTests_bcValidBlockTest, "BlockchainTests/bcValidBlockTest"}
-declare_test!{BlockchainTests_bcWalletTest, "BlockchainTests/bcWalletTest"}
+mod daohardfork_tests {
+	use tests::helpers::*;
+	use super::json_chain_test;

-declare_test!{BlockchainTests_RandomTests_bl10251623GO, "BlockchainTests/RandomTests/bl10251623GO"}
-declare_test!{BlockchainTests_RandomTests_bl201507071825GO, "BlockchainTests/RandomTests/bl201507071825GO"}
+	fn do_json_test(json_data: &[u8]) -> Vec<String> {
+		json_chain_test(json_data, ChainEra::DaoHardfork)
+	}
+
+	declare_test!{BlockchainTests_TestNetwork_bcSimpleTransitionTest, "BlockchainTests/TestNetwork/bcSimpleTransitionTest"}
+	declare_test!{BlockchainTests_TestNetwork_bcTheDaoTest, "BlockchainTests/TestNetwork/bcTheDaoTest"}
+}
--- a/ethcore/src/json_tests/state.rs
+++ b/ethcore/src/json_tests/state.rs
@ -30,8 +30,9 @@ pub fn json_chain_test(json_data: &[u8], era: ChainEra) -> Vec<String> {
 	let mut failed = Vec::new();
 	let engine = match era {
 		ChainEra::Frontier => ethereum::new_mainnet_like().engine,
-		ChainEra::Homestead => ethereum::new_homestead_test().engine
-	};
+		ChainEra::Homestead => ethereum::new_homestead_test().engine,
+		ChainEra::DaoHardfork => ethereum::new_daohardfork_test().engine,
+};

 	for (name, test) in tests.into_iter() {
 		let mut fail = false;
--- a/ethcore/src/miner/miner.rs
+++ b/ethcore/src/miner/miner.rs
@ -116,7 +116,7 @@ impl GasPriceCalibrator {
 				let wei_per_usd: f32 = 1.0e18 / usd_per_eth;
 				let gas_per_tx: f32 = 21000.0;
 				let wei_per_gas: f32 = wei_per_usd * usd_per_tx / gas_per_tx;
-				info!(target: "miner", "Updated conversion rate to Ξ1 = {} ({} wei/gas)", format!("US${}", usd_per_eth).apply(Colour::White.bold()), format!("{}", wei_per_gas).apply(Colour::Yellow.bold()));
+				info!(target: "miner", "Updated conversion rate to Ξ1 = {} ({} wei/gas)", Colour::White.bold().paint(format!("US${}", usd_per_eth)), Colour::Yellow.bold().paint(format!("{}", wei_per_gas)));
 				set_price(U256::from_dec_str(&format!("{:.0}", wei_per_gas)).unwrap());
 			}) {
 				self.next_calibration = Instant::now() + self.options.recalibration_period;
@ -775,7 +775,7 @@ impl MinerService for Miner {
 			let n = sealed.header().number();
 			let h = sealed.header().hash();
 			try!(chain.import_sealed_block(sealed));
-			info!(target: "miner", "Mined block imported OK. #{}: {}", format!("{}", n).apply(Colour::White.bold()), h.hex().apply(Colour::White.bold()));
+			info!(target: "miner", "Mined block imported OK. #{}: {}", Colour::White.bold().paint(format!("{}", n)), Colour::White.bold().paint(h.hex()));
 			Ok(())
 		})
 	}
--- a/ethcore/src/service.rs
+++ b/ethcore/src/service.rs
@ -54,7 +54,7 @@ impl ClientService {
 		let io_service = try!(IoService::<ClientIoMessage>::start());
 		panic_handler.forward_from(&io_service);

-		info!("Configured for {} using {} engine", spec.name.clone().apply(Colour::White.bold()), spec.engine.name().apply(Colour::Yellow.bold()));
+		info!("Configured for {} using {} engine", Colour::White.bold().paint(spec.name.clone()), Colour::Yellow.bold().paint(spec.engine.name()));
 		let client = try!(Client::new(config, spec, db_path, miner, io_service.channel()));
 		panic_handler.forward_from(client.deref());
 		let client_io = Arc::new(ClientIoHandler {
--- a/ethcore/src/state.rs
+++ b/ethcore/src/state.rs
@ -232,36 +232,10 @@ impl State {
 		let options = TransactOptions { tracing: tracing, vm_tracing: false, check_nonce: true };
 		let e = try!(Executive::new(self, env_info, engine, vm_factory).transact(t, options));

-		let broken_dao = H256::from("6a5d24750f78441e56fec050dc52fe8e911976485b7472faac7464a176a67caa");
-
-		// dao attack soft fork
-		if engine.schedule(&env_info).reject_dao_transactions {
-			let whitelisted = if let Action::Call(to) = t.action {
-				to == Address::from("Da4a4626d3E16e094De3225A751aAb7128e96526") ||
-				to == Address::from("2ba9D006C1D72E67A70b5526Fc6b4b0C0fd6D334")
-			} else { false };
-			if !whitelisted {
-				// collect all the addresses which have changed.
-				let addresses = self.cache.borrow().iter().map(|(addr, _)| addr.clone()).collect::<Vec<_>>();
-
-				for a in &addresses {
-					if self.code(a).map_or(false, |c| c.sha3() == broken_dao) {
-						// Figure out if the balance has been reduced.
-						let maybe_original = self.trie_factory
-							.readonly(self.db.as_hashdb(), &self.root)
-							.expect(SEC_TRIE_DB_UNWRAP_STR)
-							.get(&a).map(Account::from_rlp);
-						if maybe_original.map_or(false, |original| *original.balance() > self.balance(a)) {
-							return Err(Error::Transaction(TransactionError::DAORescue));
-						}
-					}
-				}
-			}
-		}
-
 		// TODO uncomment once to_pod() works correctly.
 //		trace!("Applied transaction. Diff:\n{}\n", state_diff::diff_pod(&old, &self.to_pod()));
 		self.commit();
+		self.clear();
 		let receipt = Receipt::new(self.root().clone(), e.cumulative_gas_used, e.logs);
 //		trace!("Transaction receipt: {:?}", receipt);
 		Ok(ApplyOutcome{receipt: receipt, trace: e.trace})
@ -275,12 +249,12 @@ impl State {
 		// TODO: is this necessary or can we dispense with the `ref mut a` for just `a`?
 		for (address, ref mut a) in accounts.iter_mut() {
 			match a {
-				&mut&mut Some(ref mut account) => {
+				&mut&mut Some(ref mut account) if account.is_dirty() => {
 					let mut account_db = AccountDBMut::new(db, address);
 					account.commit_storage(trie_factory, &mut account_db);
 					account.commit_code(&mut account_db);
 				}
-				&mut&mut None => {}
+				_ => {}
 			}
 		}

@ -288,8 +262,9 @@ impl State {
 			let mut trie = trie_factory.from_existing(db, root).unwrap();
 			for (address, ref a) in accounts.iter() {
 				match **a {
-					Some(ref account) => trie.insert(address, &account.rlp()),
+					Some(ref account) if account.is_dirty() => trie.insert(address, &account.rlp()),
 					None => trie.remove(address),
+					_ => (),
 				}
 			}
 		}
@ -301,6 +276,11 @@ impl State {
 		Self::commit_into(&self.trie_factory, self.db.as_hashdb_mut(), &mut self.root, self.cache.borrow_mut().deref_mut());
 	}

+	/// Clear state cache
+	pub fn clear(&mut self) {
+		self.cache.borrow_mut().clear();
+	}
+
 	#[cfg(test)]
 	#[cfg(feature = "json-tests")]
 	/// Populate the state from `accounts`.
--- a/ethcore/src/tests/helpers.rs
+++ b/ethcore/src/tests/helpers.rs
@ -30,6 +30,7 @@ use miner::Miner;
 pub enum ChainEra {
 	Frontier,
 	Homestead,
+	DaoHardfork,
 }

 pub struct TestEngine {
--- a/install-parity.sh
+++ b/install-parity.sh
@ -1,6 +1,6 @@
 #!/usr/bin/env bash

-PARITY_DEB_URL=https://github.com/ethcore/parity/releases/download/v1.2.1/parity_linux_1.2.1-0_amd64.deb
+PARITY_DEB_URL=https://github.com/ethcore/parity/releases/download/v1.2.2/parity_linux_1.2.2-0_amd64.deb


 function run_installer()
--- a/json/src/spec/engine.rs
+++ b/json/src/spec/engine.rs
@ -53,7 +53,10 @@ mod tests {
 					"durationLimit": "0x0d",
 					"blockReward": "0x4563918244F40000",
 					"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-					"frontierCompatibilityModeLimit" : "0x"
+					"frontierCompatibilityModeLimit" : "0x",
+					"daoHardforkTransition": "0xffffffffffffffff",
+					"daoHardforkBeneficiary": "0x0000000000000000000000000000000000000000",
+					"daoHardforkAccounts": []
 				}
 			}
 		}"#;
--- a/json/src/spec/ethash.rs
+++ b/json/src/spec/ethash.rs
@ -19,29 +19,38 @@
 use uint::Uint;
 use hash::Address;

-/// Ethash params deserialization.
+/// Deserializable doppelganger of EthashParams.
 #[derive(Debug, PartialEq, Deserialize)]
 pub struct EthashParams {
-	/// Gas limit divisor.
+	/// See main EthashParams docs.
 	#[serde(rename="gasLimitBoundDivisor")]
 	pub gas_limit_bound_divisor: Uint,
-	/// Minimum difficulty.
+	/// See main EthashParams docs.
 	#[serde(rename="minimumDifficulty")]
 	pub minimum_difficulty: Uint,
-	/// Difficulty bound divisor.
+	/// See main EthashParams docs.
 	#[serde(rename="difficultyBoundDivisor")]
 	pub difficulty_bound_divisor: Uint,
-	/// Block duration.
+	/// See main EthashParams docs.
 	#[serde(rename="durationLimit")]
 	pub duration_limit: Uint,
-	/// Block reward.
+	/// See main EthashParams docs.
 	#[serde(rename="blockReward")]
 	pub block_reward: Uint,
-	/// Namereg contract address.
-	pub registrar: Address,
-	/// Homestead transition block number.
+	/// See main EthashParams docs.
+	pub registrar: Option<Address>,
+	/// See main EthashParams docs.
 	#[serde(rename="frontierCompatibilityModeLimit")]
-	pub frontier_compatibility_mode_limit: Uint,
+	pub frontier_compatibility_mode_limit: Option<Uint>,
+	/// See main EthashParams docs.
+	#[serde(rename="daoHardforkTransition")]
+	pub dao_hardfork_transition: Option<Uint>,
+	/// See main EthashParams docs.
+	#[serde(rename="daoHardforkBeneficiary")]
+	pub dao_hardfork_beneficiary: Option<Address>,
+	/// See main EthashParams docs.
+	#[serde(rename="daoHardforkAccounts")]
+	pub dao_hardfork_accounts: Option<Vec<Address>>,
 }

 /// Ethash engine deserialization.
@ -66,7 +75,46 @@ mod tests {
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar": "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0x42"
+				"frontierCompatibilityModeLimit": "0x42",
+				"daoHardforkTransition": "0x08",
+				"daoHardforkBeneficiary": "0xabcabcabcabcabcabcabcabcabcabcabcabcabca",
+				"daoHardforkAccounts": [
+					"0x304a554a310c7e546dfe434669c62820b7d83490",
+					"0x914d1b8b43e92723e64fd0a06f5bdb8dd9b10c79",
+					"0xfe24cdd8648121a43a7c86d289be4dd2951ed49f",
+					"0x17802f43a0137c506ba92291391a8a8f207f487d",
+					"0xb136707642a4ea12fb4bae820f03d2562ebff487",
+					"0xdbe9b615a3ae8709af8b93336ce9b477e4ac0940",
+					"0xf14c14075d6c4ed84b86798af0956deef67365b5",
+					"0xca544e5c4687d109611d0f8f928b53a25af72448",
+					"0xaeeb8ff27288bdabc0fa5ebb731b6f409507516c",
+					"0xcbb9d3703e651b0d496cdefb8b92c25aeb2171f7",
+					"0xaccc230e8a6e5be9160b8cdf2864dd2a001c28b6",
+					"0x2b3455ec7fedf16e646268bf88846bd7a2319bb2",
+					"0x4613f3bca5c44ea06337a9e439fbc6d42e501d0a",
+					"0xd343b217de44030afaa275f54d31a9317c7f441e",
+					"0x84ef4b2357079cd7a7c69fd7a37cd0609a679106",
+					"0xda2fef9e4a3230988ff17df2165440f37e8b1708",
+					"0xf4c64518ea10f995918a454158c6b61407ea345c",
+					"0x7602b46df5390e432ef1c307d4f2c9ff6d65cc97",
+					"0xbb9bc244d798123fde783fcc1c72d3bb8c189413",
+					"0x807640a13483f8ac783c557fcdf27be11ea4ac7a"
+				]
+			}
+		}"#;
+
+		let _deserialized: Ethash = serde_json::from_str(s).unwrap();
+	}
+
+	#[test]
+	fn ethash_deserialization_missing_optionals() {
+		let s = r#"{
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"minimumDifficulty": "0x020000",
+				"difficultyBoundDivisor": "0x0800",
+				"durationLimit": "0x0d",
+				"blockReward": "0x4563918244F40000"
 			}
 		}"#;

--- a/json/src/spec/spec.rs
+++ b/json/src/spec/spec.rs
@ -63,7 +63,10 @@ mod tests {
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit" : "0x"
+				"frontierCompatibilityModeLimit" : "0x",
+				"daoHardforkTransition": "0xffffffffffffffff",
+				"daoHardforkBeneficiary": "0x0000000000000000000000000000000000000000",
+				"daoHardforkAccounts": []
 			}
 		}
 	},
--- a/parity/cli.rs
+++ b/parity/cli.rs
@ -47,18 +47,13 @@ Operating Options:
                           [default: 3600].
  --chain CHAIN            Specify the blockchain type. CHAIN may be either a
                           JSON chain specification file or olympic, frontier,
-                           homestead, mainnet, morden, or testnet
-                           [default: homestead].
+                           homestead, mainnet, morden, homestead-dogmatic, or
+                           testnet [default: homestead].
  -d --db-path PATH        Specify the database & configuration directory path
                           [default: $HOME/.parity].
  --keys-path PATH         Specify the path for JSON key files to be found
                           [default: $HOME/.parity/keys].
  --identity NAME          Specify your node's name.
-  --fork POLICY            Specifies the client's fork policy. POLICY must be
-                           one of:
-                           dogmatic - sticks rigidly to the standard chain.
-                           none - goes with whatever fork is decided but
-                           votes for none. [default: none].

 Account Options:
  --unlock ACCOUNTS        Unlock ACCOUNTS for the duration of the execution.
@ -145,7 +140,7 @@ Sealing/Mining Options:
                           none - never reseal on new transactions;
                           own - reseal only on a new local transaction;
                           ext - reseal only on a new external transaction;
-                           all - reseal on all new transactions [default: all].
+                           all - reseal on all new transactions [default: own].
  --reseal-min-period MS   Specify the minimum time between reseals from 
                           incoming transactions. MS is time measured in
                           milliseconds [default: 2000].
@ -292,7 +287,6 @@ pub struct Args {
 	pub flag_chain: String,
 	pub flag_db_path: String,
 	pub flag_identity: String,
-	pub flag_fork: String,
 	pub flag_unlock: Option<String>,
 	pub flag_password: Vec<String>,
 	pub flag_cache: Option<usize>,
--- a/parity/configuration.rs
+++ b/parity/configuration.rs
@ -46,12 +46,6 @@ pub struct Directories {
 	pub signer: String,
 }

-#[derive(Eq, PartialEq, Debug)]
-pub enum Policy {
-	None,
-	Dogmatic,
-}
-
 impl Configuration {
 	pub fn parse() -> Self {
 		Configuration {
@ -131,14 +125,6 @@ impl Configuration {
 			}))
 	}

-	pub fn policy(&self) -> Policy {
-		match self.args.flag_fork.as_str() {
-			"none" => Policy::None,
-			"dogmatic" => Policy::Dogmatic,
-			x => die!("{}: Invalid value given for --policy option. Use --help for more info.", x)
-		}
-	}
-
 	pub fn gas_floor_target(&self) -> U256 {
 		let d = &self.args.flag_gas_floor_target;
 		U256::from_dec_str(d).unwrap_or_else(|_| {
@ -195,7 +181,7 @@ impl Configuration {
 						let wei_per_usd: f32 = 1.0e18 / usd_per_eth;
 						let gas_per_tx: f32 = 21000.0;
 						let wei_per_gas: f32 = wei_per_usd * usd_per_tx / gas_per_tx;
-						info!("Using a fixed conversion rate of Ξ1 = {} ({} wei/gas)", format!("US${}", usd_per_eth).apply(White.bold()), format!("{}", wei_per_gas).apply(Yellow.bold()));
+						info!("Using a fixed conversion rate of Ξ1 = {} ({} wei/gas)", White.bold().paint(format!("US${}", usd_per_eth)), Yellow.bold().paint(format!("{}", wei_per_gas)));
 						GasPricer::Fixed(U256::from_dec_str(&format!("{:.0}", wei_per_gas)).unwrap())
 					}
 				}
@ -214,6 +200,7 @@ impl Configuration {
 	pub fn spec(&self) -> Spec {
 		match self.chain().as_str() {
 			"frontier" | "homestead" | "mainnet" => ethereum::new_frontier(),
+			"homestead-dogmatic" => ethereum::new_frontier_dogmatic(),
 			"morden" | "testnet" => ethereum::new_morden(),
 			"olympic" => ethereum::new_olympic(),
 			f => Spec::load(contents(f).unwrap_or_else(|_| {
--- a/parity/informant.rs
+++ b/parity/informant.rs
@ -20,6 +20,7 @@ use self::ansi_term::Style;

 use std::time::{Instant, Duration};
 use std::ops::{Deref, DerefMut};
+use isatty::{stdout_isatty};
 use ethsync::{SyncStatus, NetworkConfiguration};
 use util::{Uint, RwLock};
 use ethcore::client::*;
@ -91,7 +92,7 @@ impl Informant {
 		let mut write_report = self.report.write();
 		let report = client.report();

-		let paint = |c: Style, t: String| match self.with_color {
+		let paint = |c: Style, t: String| match self.with_color && stdout_isatty() {
 			true => format!("{}", c.paint(t)),
 			false => t,
 		};
--- a/parity/main.rs
+++ b/parity/main.rs
@ -53,6 +53,7 @@ extern crate ansi_term;
 #[macro_use]
 extern crate lazy_static;
 extern crate regex;
+extern crate isatty;

 #[cfg(feature = "dapps")]
 extern crate ethcore_dapps;
@ -82,7 +83,7 @@ use std::thread::sleep;
 use std::time::Duration;
 use rustc_serialize::hex::FromHex;
 use ctrlc::CtrlC;
-use util::{H256, ToPretty, PayloadInfo, Bytes, Colour, Applyable, version, journaldb};
+use util::{H256, ToPretty, PayloadInfo, Bytes, Colour, version, journaldb};
 use util::panics::{MayPanic, ForwardPanic, PanicHandler};
 use ethcore::client::{BlockID, BlockChainClient, ClientConfig, get_db_path, BlockImportError,
 	ChainNotify, Mode};
@ -101,7 +102,7 @@ use rpc::RpcServer;
 use signer::{SignerServer, new_token};
 use dapps::WebappServer;
 use io_handler::ClientIoHandler;
-use configuration::{Policy, Configuration};
+use configuration::{Configuration};

 fn main() {
 	let conf = Configuration::parse();
@ -179,7 +180,7 @@ fn execute_upgrades(conf: &Configuration, spec: &Spec, client_config: &ClientCon
 	let db_path = get_db_path(Path::new(&conf.path()), client_config.pruning, spec.genesis_header().hash());
 	let result = migrate(&db_path, client_config.pruning);
 	if let Err(err) = result {
-		die_with_message(&format!("{}", err));
+		die_with_message(&format!("{} DB path: {}", err, db_path.to_string_lossy()));
 	}
 }

@ -192,18 +193,18 @@ fn execute_client(conf: Configuration, spec: Spec, client_config: ClientConfig)
 	// Raise fdlimit
 	unsafe { ::fdlimit::raise_fd_limit(); }

-	info!("Starting {}", format!("{}", version()).apply(Colour::White.bold()));
-	info!("Using state DB journalling strategy {}", match client_config.pruning {
+	info!("Starting {}", Colour::White.bold().paint(format!("{}", version())));
+	info!("Using state DB journalling strategy {}", Colour::White.bold().paint(match client_config.pruning {
 		journaldb::Algorithm::Archive => "archive",
 		journaldb::Algorithm::EarlyMerge => "light",
 		journaldb::Algorithm::OverlayRecent => "fast",
 		journaldb::Algorithm::RefCounted => "basic",
-	}.apply(Colour::White.bold()));
+	}));

 	// Display warning about using experimental journaldb types
 	match client_config.pruning {
 		journaldb::Algorithm::EarlyMerge | journaldb::Algorithm::RefCounted => {
-			warn!("Your chosen strategy is {}! You can re-run with --pruning to change.", "unstable".apply(Colour::Red.bold()));
+			warn!("Your chosen strategy is {}! You can re-run with --pruning to change.", Colour::Red.bold().paint("unstable"));
 		}
 		_ => {}
 	}
@ -214,11 +215,6 @@ fn execute_client(conf: Configuration, spec: Spec, client_config: ClientConfig)
 		warn!("NOTE that Signer will not ask you to confirm transactions from unlocked account.");
 	}

-	// Check fork settings.
-	if conf.policy() != Policy::None {
-		warn!("Value given for --policy, yet no proposed forks exist. Ignoring.");
-	}
-
 	let net_settings = conf.net_settings(&spec);
 	let sync_config = conf.sync_config(&spec);

--- a/parity/migration.rs
+++ b/parity/migration.rs
@ -37,11 +37,15 @@ const VERSION_FILE_NAME: &'static str = "db_version";
 pub enum Error {
 	/// Returned when current version cannot be read or guessed.
 	UnknownDatabaseVersion,
-	/// Returned when migration is not possible.
+	/// Migration does not support existing pruning algorithm.
+	UnsuportedPruningMethod,
+	/// Existing DB is newer than the known one.
+	FutureDBVersion,
+	/// Migration is not possible.
 	MigrationImpossible,
-	/// Returned when migration unexpectadly failed.
+	/// Migration unexpectadly failed.
 	MigrationFailed,
-	/// Returned when migration was completed succesfully,
+	/// Migration was completed succesfully,
 	/// but there was a problem with io.
 	Io(IoError),
 }
@ -50,9 +54,11 @@ impl Display for Error {
 	fn fmt(&self, f: &mut Formatter) -> Result<(), FmtError> {
 		let out = match *self {
 			Error::UnknownDatabaseVersion => "Current database version cannot be read".into(),
-			Error::MigrationImpossible => format!("Migration to version {} is not possible", CURRENT_VERSION),
-			Error::MigrationFailed => "Migration unexpectedly failed".into(),
-			Error::Io(ref err) => format!("Unexpected io error: {}", err),
+			Error::UnsuportedPruningMethod => "Unsupported pruning method for database migration. Delete DB and resync.".into(),
+			Error::FutureDBVersion => "Database was created with newer client version. Upgrade your client or delete DB and resync.".into(),
+			Error::MigrationImpossible => format!("Database migration to version {} is not possible.", CURRENT_VERSION),
+			Error::MigrationFailed => "Database migration unexpectedly failed".into(),
+			Error::Io(ref err) => format!("Unexpected io error on DB migration: {}.", err),
 		};

 		write!(f, "{}", out)
@ -159,7 +165,7 @@ fn state_database_migrations(pruning: Algorithm) -> Result<MigrationManager, Err
 	let res = match pruning {
 		Algorithm::Archive => manager.add_migration(migrations::state::ArchiveV7::default()),
 		Algorithm::OverlayRecent => manager.add_migration(migrations::state::OverlayRecentV7::default()),
-		_ => die!("Unsupported pruning method for migration. Delete DB and resync"),
+		_ => return Err(Error::UnsuportedPruningMethod),
 	};

 	try!(res.map_err(|_| Error::MigrationImpossible));
@ -207,12 +213,14 @@ pub fn migrate(path: &Path, pruning: Algorithm) -> Result<(), Error> {

 	// migrate the databases.
 	// main db directory may already exists, so let's check if we have blocks dir
-	if version != CURRENT_VERSION && exists(&blocks_database_path(path)) {
+	if version < CURRENT_VERSION && exists(&blocks_database_path(path)) {
 		println!("Migrating database from version {} to {}", version, CURRENT_VERSION);
 		try!(migrate_database(version, blocks_database_path(path), try!(blocks_database_migrations())));
 		try!(migrate_database(version, extras_database_path(path), try!(extras_database_migrations())));
 		try!(migrate_database(version, state_database_path(path), try!(state_database_migrations(pruning))));
 		println!("Migration finished");
+	} else if version > CURRENT_VERSION {
+		return Err(Error::FutureDBVersion);
 	}

 	// update version file.
--- a/parity/setup_log.rs
+++ b/parity/setup_log.rs
@ -19,11 +19,12 @@ use std::env;
 use std::sync::Arc;
 use std::fs::File;
 use std::io::Write;
+use isatty::{stderr_isatty};
 use time;
 use env_logger::LogBuilder;
 use regex::Regex;
 use util::RotatingLogger;
-use util::log::{Applyable, Colour};
+use util::log::Colour;

 /// Sets up the logger
 pub fn setup_log(init: &Option<String>, enable_color: bool, log_to_file: &Option<String>) -> Arc<RotatingLogger> {
@ -47,19 +48,26 @@ pub fn setup_log(init: &Option<String>, enable_color: bool, log_to_file: &Option
 		builder.parse(s);
 	}

-	let logs = Arc::new(RotatingLogger::new(levels, enable_color));
+	let enable_color = enable_color && stderr_isatty();
+	let logs = Arc::new(RotatingLogger::new(levels));
 	let logger = logs.clone();
 	let maybe_file = log_to_file.as_ref().map(|f| File::create(f).unwrap_or_else(|_| die!("Cannot write to log file given: {}", f)));
 	let format = move |record: &LogRecord| {
 		let timestamp = time::strftime("%Y-%m-%d %H:%M:%S %Z", &time::now()).unwrap();

-		let format = if max_log_level() <= LogLevelFilter::Info {
-			format!("{}{}", timestamp.apply(Colour::Black.bold()), record.args())
+		let with_color = if max_log_level() <= LogLevelFilter::Info {
+			format!("{}{}", Colour::Black.bold().paint(timestamp), record.args())
 		} else {
-			format!("{}{}:{}: {}", timestamp.apply(Colour::Black.bold()), record.level(), record.target(), record.args())
+			format!("{}{}:{}: {}", Colour::Black.bold().paint(timestamp), record.level(), record.target(), record.args())
+		};
+
+		let removed_color = kill_color(with_color.as_ref());
+
+		let ret = match enable_color {
+			true => with_color,
+			false => removed_color.clone(),
 		};

-		let removed_color = kill_color(format.as_ref());
 		if let Some(mut file) = maybe_file.as_ref() {
 			// ignore errors - there's nothing we can do
 			let _ = file.write_all(removed_color.as_bytes());
@ -67,7 +75,7 @@ pub fn setup_log(init: &Option<String>, enable_color: bool, log_to_file: &Option
 		}
 		logger.append(removed_color);

-		format
+		ret
    };
 	builder.format(format);
 	builder.init().unwrap();
@ -84,7 +92,7 @@ fn kill_color(s: &str) -> String {
 #[test]
 fn should_remove_colour() {
 	let before = "test";
-	let after = kill_color(&before.apply(Colour::Red.bold()));
+	let after = kill_color(&Colour::Red.bold().paint(before));
 	assert_eq!(after, "test");
 }

--- a/parity/signer.rs
+++ b/parity/signer.rs
@ -20,7 +20,6 @@ use std::path::PathBuf;
 use ansi_term::Colour;
 use util::panics::{ForwardPanic, PanicHandler};
 use util::path::restrict_permissions_owner;
-use util::Applyable;
 use rpc_apis;
 use ethcore_signer as signer;
 use die::*;
@ -60,7 +59,7 @@ pub fn new_token(path: String) -> io::Result<()> {
 	let mut codes = try!(signer::AuthCodes::from_file(&path));
 	let code = try!(codes.generate_new());
 	try!(codes.to_file(&path));
-	println!("This key code will authorise your System Signer UI: {}", code.apply(Colour::White.bold()));
+	info!("This key code will authorise your System Signer UI: {}", Colour::White.bold().paint(code));
 	Ok(())
 }

--- a/rpc/src/v1/impls/mod.rs
+++ b/rpc/src/v1/impls/mod.rs
@ -170,7 +170,6 @@ fn transaction_error(error: EthcoreError) -> Error {
 				format!("Transaction cost exceeds current gas limit. Limit: {}, got: {}. Try decreasing supplied gas.", limit, got)
 			},
 			InvalidGasLimit(_) => "Supplied gas is beyond limit.".into(),
-			DAORescue => "Transaction removes funds from a DAO.".into(),
 		};
 		Error {
 			code: ErrorCode::ServerError(error_codes::TRANSACTION_ERROR),
--- a/rpc/src/v1/tests/eth.rs
+++ b/rpc/src/v1/tests/eth.rs
@ -201,7 +201,10 @@ const TRANSACTION_COUNT_SPEC: &'static [u8] = br#"{
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0xffffffffffffffff"
+				"frontierCompatibilityModeLimit": "0xffffffffffffffff",
+				"daoHardforkTransition": "0xffffffffffffffff",
+				"daoHardforkBeneficiary": "0x0000000000000000000000000000000000000000",
+				"daoHardforkAccounts": []
 			}
 		}
 	},
--- a/rpc/src/v1/tests/mocked/ethcore.rs
+++ b/rpc/src/v1/tests/mocked/ethcore.rs
@ -32,7 +32,7 @@ fn client_service() -> Arc<TestBlockChainClient> {
 }

 fn logger() -> Arc<RotatingLogger> {
-	Arc::new(RotatingLogger::new("rpc=trace".to_owned(), false))
+	Arc::new(RotatingLogger::new("rpc=trace".to_owned()))
 }

 fn settings() -> Arc<NetworkSettings> {
--- a/util/src/journaldb/overlayrecentdb.rs
+++ b/util/src/journaldb/overlayrecentdb.rs
@ -295,7 +295,7 @@ impl JournalDB for OverlayRecentDB {
 				}
 				// update the overlay
 				for k in overlay_deletions {
-					journal_overlay.backing_overlay.remove(&OverlayRecentDB::to_short_key(&k));
+					journal_overlay.backing_overlay.remove_and_purge(&OverlayRecentDB::to_short_key(&k));
 				}
 				// apply canon deletions
 				for k in canon_deletions {
@ -303,7 +303,6 @@ impl JournalDB for OverlayRecentDB {
 						try!(batch.delete(&k));
 					}
 				}
-				journal_overlay.backing_overlay.purge();
 			}
 			journal_overlay.journal.remove(&end_era);
 		}
--- a/util/src/kvdb.rs
+++ b/util/src/kvdb.rs
@ -177,16 +177,13 @@ impl Database {
 			opts.set_block_based_table_factory(&block_opts);
 			opts.set_prefix_extractor_fixed_size(size);
 			if let Some(cache_size) = config.cache_size {
-				block_opts.set_cache(Cache::new(cache_size * 1024 * 256));
-				opts.set_write_buffer_size(cache_size * 1024 * 256);
+				block_opts.set_cache(Cache::new(cache_size * 1024 * 1024));
 			}
 		} else if let Some(cache_size) = config.cache_size {
 			let mut block_opts = BlockBasedOptions::new();
 			// half goes to read cache
-			block_opts.set_cache(Cache::new(cache_size * 1024 * 256));
+			block_opts.set_cache(Cache::new(cache_size * 1024 * 1024));
 			opts.set_block_based_table_factory(&block_opts);
-			// quarter goes to each of the two write buffers
-			opts.set_write_buffer_size(cache_size * 1024 * 256);
 		}

 		let mut write_opts = WriteOptions::new();
@ -207,12 +204,12 @@ impl Database {

 	/// Insert a key-value pair in the transaction. Any existing value value will be overwritten.
 	pub fn put(&self, key: &[u8], value: &[u8]) -> Result<(), String> {
-		self.db.put(key, value)
+		self.db.put_opt(key, value, &self.write_opts)
 	}

 	/// Delete value by key.
 	pub fn delete(&self, key: &[u8]) -> Result<(), String> {
-		self.db.delete(key)
+		self.db.delete_opt(key, &self.write_opts)
 	}

 	/// Commit transaction to database.
--- a/util/src/log.rs
+++ b/util/src/log.rs
@ -17,35 +17,13 @@
 //! Common log helper functions

 use std::env;
-use std::borrow::Cow;
 use rlog::LogLevelFilter;
 use env_logger::LogBuilder;
-use std::sync::atomic::{Ordering, AtomicBool};
 use arrayvec::ArrayVec;
 pub use ansi_term::{Colour, Style};

 use parking_lot::{RwLock, RwLockReadGuard};

-lazy_static! {
-	static ref USE_COLOR: AtomicBool = AtomicBool::new(false);
-}
-
-/// Something which can be apply()ed.
-pub trait Applyable: AsRef<str> {
-	/// Apply the style `c` to ourself, returning us styled in that manner.
-	fn apply(&self, c: Style) -> Cow<str>;
-}
-
-impl<T: AsRef<str>> Applyable for T {
-    fn apply(&self, c: Style) -> Cow<str> {
-        let s = self.as_ref();
-        match USE_COLOR.load(Ordering::Relaxed) {
-            true => Cow::Owned(format!("{}", c.paint(s))),
-            false => Cow::Borrowed(s),
-        }
-    }
-}
-
 lazy_static! {
 	static ref LOG_DUMMY: bool = {
 		let mut builder = LogBuilder::new();
@ -81,8 +59,7 @@ impl RotatingLogger {

 	/// Creates new `RotatingLogger` with given levels.
 	/// It does not enforce levels - it's just read only.
-	pub fn new(levels: String, enable_color: bool) -> Self {
-		USE_COLOR.store(enable_color, Ordering::Relaxed);
+	pub fn new(levels: String) -> Self {
 		RotatingLogger {
 			levels: levels,
 			logs: RwLock::new(ArrayVec::<[_; LOG_SIZE]>::new()),
@ -111,7 +88,7 @@ mod test {
 	use super::RotatingLogger;

 	fn logger() -> RotatingLogger {
-		RotatingLogger::new("test".to_owned(), false)
+		RotatingLogger::new("test".to_owned())
 	}

 	#[test]
--- a/util/src/memorydb.rs
+++ b/util/src/memorydb.rs
@ -24,6 +24,7 @@ use hashdb::*;
 use heapsize::*;
 use std::mem;
 use std::collections::HashMap;
+use std::collections::hash_map::Entry;
 use std::default::Default;

 #[derive(Debug,Clone)]
@ -162,6 +163,24 @@ impl MemoryDB {
 	pub fn mem_used(&self) -> usize {
 		self.data.heap_size_of_children()
 	}
+
+	/// Remove an element and delete it from storage if reference count reaches zero.
+	pub fn remove_and_purge(&mut self, key: &H256) {
+		if key == &SHA3_NULL_RLP {
+			return;
+		}
+		match self.data.entry(key.clone()) {
+			Entry::Occupied(mut entry) =>
+				if entry.get().1 == 1 {
+					entry.remove();
+				} else {
+					entry.get_mut().1 -= 1;
+				},
+			Entry::Vacant(entry) => {
+				entry.insert((Bytes::new(), -1));
+			}
+		}
+	}
 }

 static NULL_RLP_STATIC: [u8; 1] = [0x80; 1];
@ -269,3 +288,28 @@ fn memorydb_denote() {

 	assert_eq!(m.get(&hash).unwrap(), b"Hello world!");
 }
+
+#[test]
+fn memorydb_remove_and_purge() {
+	let hello_bytes = b"Hello world!";
+	let hello_key = hello_bytes.sha3();
+
+	let mut m = MemoryDB::new();
+	m.remove(&hello_key);
+	assert_eq!(m.raw(&hello_key).unwrap().1, -1);
+	m.purge();
+	assert_eq!(m.raw(&hello_key).unwrap().1, -1);
+	m.insert(hello_bytes);
+	assert_eq!(m.raw(&hello_key).unwrap().1, 0);
+	m.purge();
+	assert_eq!(m.raw(&hello_key), None);
+
+	let mut m = MemoryDB::new();
+	m.remove_and_purge(&hello_key);
+	assert_eq!(m.raw(&hello_key).unwrap().1, -1);
+	m.insert(hello_bytes);
+	m.insert(hello_bytes);
+	assert_eq!(m.raw(&hello_key).unwrap().1, 1);
+	m.remove_and_purge(&hello_key);
+	assert_eq!(m.raw(&hello_key), None);
+}
--- a/util/src/network/service.rs
+++ b/util/src/network/service.rs
@ -21,10 +21,25 @@ use network::error::NetworkError;
 use network::host::{Host, NetworkContext, NetworkIoMessage, ProtocolId};
 use network::stats::NetworkStats;
 use io::*;
-
-use std::sync::Arc;
-
 use parking_lot::RwLock;
+use std::sync::Arc;
+use ansi_term::Colour;
+
+struct HostHandler {
+	public_url: RwLock<Option<String>>
+}
+
+impl IoHandler<NetworkIoMessage> for HostHandler {
+	fn message(&self, _io: &IoContext<NetworkIoMessage>, message: &NetworkIoMessage) {
+		if let NetworkIoMessage::NetworkStarted(ref public_url) = *message {
+			let mut url = self.public_url.write();
+			if url.as_ref().map(|uref| uref != public_url).unwrap_or(true) {
+				info!(target: "network", "Public node URL: {}", Colour::White.bold().paint(public_url.as_ref()));
+			}
+			*url = Some(public_url.to_owned());
+		}
+	}
+}

 /// IO Service with networking
 /// `Message` defines a notification data type.
@ -34,12 +49,14 @@ pub struct NetworkService {
 	host: RwLock<Option<Arc<Host>>>,
 	stats: Arc<NetworkStats>,
 	panic_handler: Arc<PanicHandler>,
+	host_handler: Arc<HostHandler>,
 	config: NetworkConfiguration,
 }

 impl NetworkService {
 	/// Starts IO event loop
 	pub fn new(config: NetworkConfiguration) -> Result<NetworkService, UtilError> {
+		let host_handler = Arc::new(HostHandler { public_url: RwLock::new(None) });
 		let panic_handler = PanicHandler::new_in_arc();
 		let io_service = try!(IoService::<NetworkIoMessage>::start());
 		panic_handler.forward_from(&io_service);
@ -53,6 +70,7 @@ impl NetworkService {
 			panic_handler: panic_handler,
 			host: RwLock::new(None),
 			config: config,
+			host_handler: host_handler,
 		})
 	}

@ -106,6 +124,11 @@ impl NetworkService {
 			try!(self.io_service.register_handler(h.clone()));
 			*host = Some(h);
 		}
+
+		if self.host_handler.public_url.read().is_none() {
+			try!(self.io_service.register_handler(self.host_handler.clone()));
+		}
+
 		Ok(())
 	}