Merge branch 'master' into presale_wallet

2016-06-22 16:14:02 +02:00 · 2016-06-22 16:14:02 +02:00 · 927ffa7e9c
parent bbe5cd001a f947a9cb71
commit 927ffa7e9c
51 changed files with 27413 additions and 336 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@ -630,7 +630,7 @@ dependencies = [
 [[package]]
 name = "jsonrpc-http-server"
 version = "5.1.0"
-source = "git+https://github.com/ethcore/jsonrpc-http-server.git#6117b1d77b5a60d6fa2dc884f12aa7f5fd4585ca"
+source = "git+https://github.com/ethcore/jsonrpc-http-server.git#0c99d308bc15e8fae50642eff77a3e1fd7610652"
 dependencies = [
 "hyper 0.9.3 (git+https://github.com/ethcore/hyper)",
 "jsonrpc-core 2.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
@ -936,7 +936,7 @@ dependencies = [
 [[package]]
 name = "parity-dapps-builtins"
 version = "0.5.1"
-source = "git+https://github.com/ethcore/parity-dapps-builtins-rs.git#413ef9a6f9c46d16d578a48e39adb44d5650d7d7"
+source = "git+https://github.com/ethcore/parity-dapps-builtins-rs.git#650b0d94d076635904b86c1fd45c5f4a2061463f"
 dependencies = [
 "parity-dapps 0.3.0 (git+https://github.com/ethcore/parity-dapps-rs.git)",
 ]
@ -960,7 +960,7 @@ dependencies = [
 [[package]]
 name = "parity-minimal-sysui"
 version = "0.1.0"
-source = "git+https://github.com/ethcore/parity-dapps-minimal-sysui-rs.git#4c704913f671060bb0e43b5ce4a68d02281115d5"
+source = "git+https://github.com/ethcore/parity-dapps-minimal-sysui-rs.git#3c6ad40680126a760eb867b07b506ea996819ce3"

 [[package]]
 name = "phf"
@ -1103,7 +1103,7 @@ 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#e0e6c099d8cd156fe446009fce241d57b00cd8f4"
+source = "git+https://github.com/ethcore/rust-rocksdb#6f3c68f5f075433d206be4af6a620651cd9f8541"
 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)",
@ -1112,7 +1112,7 @@ dependencies = [
 [[package]]
 name = "rocksdb-sys"
 version = "0.3.0"
-source = "git+https://github.com/ethcore/rust-rocksdb#e0e6c099d8cd156fe446009fce241d57b00cd8f4"
+source = "git+https://github.com/ethcore/rust-rocksdb#6f3c68f5f075433d206be4af6a620651cd9f8541"
 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/README.md
+++ b/README.md
@ -36,7 +36,7 @@ below to build from source.

 ----

-## Building from source
+## Build dependencies

 Parity is fully compatible with Stable Rust.

@ -55,7 +55,19 @@ We recommend installing Rust through [rustup](https://www.rustup.rs/). If you do
 	$ rustup default stable-x86_64-pc-windows-msvc
    ```

-Once you have rustup, download and build parity:
+Once you have rustup, install parity or download and build from source
+
+----
+
+## Quick install
+
+```bash
+cargo install --git https://github.com/ethcore/parity.git parity
+```
+
+----
+
+## Build from source

 ```bash
 # download Parity code
--- a/docker/centos/Dockerfile
+++ b/docker/centos/Dockerfile
@ -0,0 +1,25 @@
+FROM centos:latest
+WORKDIR /build
+# install tools and dependencies
+RUN yum -y update&& \
+    yum install -y git make gcc-c++ gcc file 
+# install rustup
+RUN curl -sSf https://static.rust-lang.org/rustup.sh -o rustup.sh &&\
+ls&&\ 
+ sh rustup.sh -s -- --disable-sudo
+# show backtraces
+ENV RUST_BACKTRACE 1
+ENV CXX g++
+ENV CC gcc
+RUN rustc -vV && \
+cargo -V && \
+gcc -v &&\
+g++ -v
+# git clone parity
+RUN git clone https://github.com/ethcore/parity && \
+	cd parity&&\
+        ls -a&&\
+        cargo build --release --verbose && \
+	ls /build/parity/target/release/parity &&	\
+	file /build/parity/target/release/parity && \
+RUN file /build/parity/target/release/parity
--- a/ethcore/res/ethereum/frontier.json
+++ b/ethcore/res/ethereum/frontier.json
@ -9,7 +9,8 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0x118c30"
+				"frontierCompatibilityModeLimit": "0x118c30",
+				"daoRescueSoftFork": false
 			}
 		}
 	},
--- a/ethcore/res/ethereum/frontier_dao_rescue.json
+++ b/ethcore/res/ethereum/frontier_dao_rescue.json
--- a/ethcore/res/ethereum/frontier_like_test.json
+++ b/ethcore/res/ethereum/frontier_like_test.json
@ -9,7 +9,8 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0x118c30"
+				"frontierCompatibilityModeLimit": "0x118c30",
+				"daoRescueSoftFork": false
 			}
 		}
 	},
--- a/ethcore/res/ethereum/frontier_like_test_dao_rescue.json
+++ b/ethcore/res/ethereum/frontier_like_test_dao_rescue.json
@ -0,0 +1,43 @@
+{
+	"name": "Frontier (Test)",
+	"engine": {
+		"Ethash": {
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"minimumDifficulty": "0x020000",
+				"difficultyBoundDivisor": "0x0800",
+				"durationLimit": "0x0d",
+				"blockReward": "0x4563918244F40000",
+				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
+				"frontierCompatibilityModeLimit": "0x118c30",
+				"daoRescueSoftFork": true
+			}
+		}
+	},
+	"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_test.json
+++ b/ethcore/res/ethereum/frontier_test.json
@ -9,7 +9,8 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0xffffffffffffffff"
+				"frontierCompatibilityModeLimit": "0xffffffffffffffff",
+				"daoRescueSoftFork": false
 			}
 		}
 	},
--- a/ethcore/res/ethereum/homestead_test.json
+++ b/ethcore/res/ethereum/homestead_test.json
@ -9,7 +9,8 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": 0
+				"frontierCompatibilityModeLimit": 0,
+				"daoRescueSoftFork": false
 			}
 		}
 	},
--- a/ethcore/res/ethereum/homestead_test_dao_rescue.json
+++ b/ethcore/res/ethereum/homestead_test_dao_rescue.json
@ -0,0 +1,43 @@
+{
+	"name": "Homestead (Test)",
+	"engine": {
+		"Ethash": {
+			"params": {
+				"gasLimitBoundDivisor": "0x0400",
+				"minimumDifficulty": "0x020000",
+				"difficultyBoundDivisor": "0x0800",
+				"durationLimit": "0x0d",
+				"blockReward": "0x4563918244F40000",
+				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
+				"frontierCompatibilityModeLimit": 0,
+				"daoRescueSoftFork": true
+			}
+		}
+	},
+	"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/morden.json
+++ b/ethcore/res/ethereum/morden.json
@ -9,7 +9,8 @@
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar": "",
-				"frontierCompatibilityModeLimit": "0x789b0"
+				"frontierCompatibilityModeLimit": "0x789b0",
+				"daoRescueSoftFork": false
 			}
 		}
 	},
--- a/ethcore/res/ethereum/olympic.json
+++ b/ethcore/res/ethereum/olympic.json
@ -9,7 +9,8 @@
 				"durationLimit": "0x08",
 				"blockReward": "0x14D1120D7B160000",
 				"registrar": "5e70c0bbcd5636e0f9f9316e9f8633feb64d4050",
-				"frontierCompatibilityModeLimit": "0xffffffffffffffff"
+				"frontierCompatibilityModeLimit": "0xffffffffffffffff",
+				"daoRescueSoftFork": false
 			}
 		}
 	},
--- a/ethcore/src/basic_authority.rs
+++ b/ethcore/src/basic_authority.rs
@ -203,8 +203,9 @@ mod tests {
 			timestamp: 0,
 			difficulty: 0.into(),
 			last_hashes: vec![],
+			dao_rescue_block_gas_limit: None,
 			gas_used: 0.into(),
-			gas_limit: 0.into()
+			gas_limit: 0.into(),
 		});

 		assert!(schedule.stack_limit > 0);
@ -253,7 +254,7 @@ mod tests {
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let last_hashes = vec![genesis_header.hash()];
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, addr, 3141562.into(), vec![]).unwrap();
+		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, None, addr, 3141562.into(), vec![]).unwrap();
 		let b = b.close_and_lock();
 		let seal = engine.generate_seal(b.block(), Some(&tap)).unwrap();
 		assert!(b.try_seal(engine.deref(), seal).is_ok());
--- a/ethcore/src/block.rs
+++ b/ethcore/src/block.rs
@ -177,6 +177,7 @@ pub struct OpenBlock<'x> {
 	engine: &'x Engine,
 	vm_factory: &'x EvmFactory,
 	last_hashes: LastHashes,
+	dao_rescue_block_gas_limit: Option<U256>,
 }

 /// Just like `OpenBlock`, except that we've applied `Engine::on_close_block`, finished up the non-seal header fields,
@ -188,6 +189,7 @@ pub struct ClosedBlock {
 	block: ExecutedBlock,
 	uncle_bytes: Bytes,
 	last_hashes: LastHashes,
+	dao_rescue_block_gas_limit: Option<U256>,
 	unclosed_state: State,
 }

@ -198,7 +200,6 @@ pub struct ClosedBlock {
 pub struct LockedBlock {
 	block: ExecutedBlock,
 	uncle_bytes: Bytes,
-	last_hashes: LastHashes,
 }

 /// A block that has a valid seal.
@ -219,9 +220,10 @@ impl<'x> OpenBlock<'x> {
 		db: Box<JournalDB>,
 		parent: &Header,
 		last_hashes: LastHashes,
+		dao_rescue_block_gas_limit: Option<U256>,
 		author: Address,
 		gas_floor_target: U256,
-		extra_data: Bytes
+		extra_data: Bytes,
 	) -> Result<Self, Error> {
 		let state = try!(State::from_existing(db, parent.state_root().clone(), engine.account_start_nonce()));
 		let mut r = OpenBlock {
@ -229,6 +231,7 @@ impl<'x> OpenBlock<'x> {
 			engine: engine,
 			vm_factory: vm_factory,
 			last_hashes: last_hashes,
+			dao_rescue_block_gas_limit: dao_rescue_block_gas_limit,
 		};

 		r.block.base.header.parent_hash = parent.hash();
@ -293,6 +296,7 @@ impl<'x> OpenBlock<'x> {
 			last_hashes: self.last_hashes.clone(),		// TODO: should be a reference.
 			gas_used: self.block.receipts.last().map_or(U256::zero(), |r| r.gas_used),
 			gas_limit: self.block.base.header.gas_limit.clone(),
+			dao_rescue_block_gas_limit: if self.block.base.header.number == 1760000 { Some(self.block.base.header.gas_limit) } else { self.dao_rescue_block_gas_limit },
 		}
 	}

@ -339,6 +343,7 @@ impl<'x> OpenBlock<'x> {
 			block: s.block,
 			uncle_bytes: uncle_bytes,
 			last_hashes: s.last_hashes,
+			dao_rescue_block_gas_limit: s.dao_rescue_block_gas_limit,
 			unclosed_state: unclosed_state,
 		}
 	}
@ -360,7 +365,6 @@ impl<'x> OpenBlock<'x> {
 		LockedBlock {
 			block: s.block,
 			uncle_bytes: uncle_bytes,
-			last_hashes: s.last_hashes,
 		}
 	}
 }
@ -386,7 +390,6 @@ impl ClosedBlock {
 		LockedBlock {
 			block: self.block,
 			uncle_bytes: self.uncle_bytes,
-			last_hashes: self.last_hashes,
 		}
 	}

@ -400,6 +403,7 @@ impl ClosedBlock {
 			engine: engine,
 			vm_factory: vm_factory,
 			last_hashes: self.last_hashes,
+			dao_rescue_block_gas_limit: self.dao_rescue_block_gas_limit,
 		}
 	}
 }
@ -456,7 +460,18 @@ impl IsBlock for SealedBlock {

 /// Enact the block given by block header, transactions and uncles
 #[cfg_attr(feature="dev", allow(too_many_arguments))]
-pub fn enact(header: &Header, transactions: &[SignedTransaction], uncles: &[Header], engine: &Engine, tracing: bool, db: Box<JournalDB>, parent: &Header, last_hashes: LastHashes, vm_factory: &EvmFactory) -> Result<LockedBlock, Error> {
+pub fn enact(
+	header: &Header,
+	transactions: &[SignedTransaction],
+	uncles: &[Header],
+	engine: &Engine,
+	tracing: bool,
+	db: Box<JournalDB>,
+	parent: &Header,
+	last_hashes: LastHashes,
+	dao_rescue_block_gas_limit: Option<U256>,
+	vm_factory: &EvmFactory
+) -> Result<LockedBlock, Error> {
 	{
 		if ::log::max_log_level() >= ::log::LogLevel::Trace {
 			let s = try!(State::from_existing(db.boxed_clone(), parent.state_root().clone(), engine.account_start_nonce()));
@ -464,7 +479,7 @@ pub fn enact(header: &Header, transactions: &[SignedTransaction], uncles: &[Head
 		}
 	}

-	let mut b = try!(OpenBlock::new(engine, vm_factory, tracing, db, parent, last_hashes, header.author().clone(), 3141562.into(), header.extra_data().clone()));
+	let mut b = try!(OpenBlock::new(engine, vm_factory, tracing, db, parent, last_hashes, dao_rescue_block_gas_limit, header.author().clone(), 3141562.into(), header.extra_data().clone()));
 	b.set_difficulty(*header.difficulty());
 	b.set_gas_limit(*header.gas_limit());
 	b.set_timestamp(header.timestamp());
@ -474,22 +489,49 @@ pub fn enact(header: &Header, transactions: &[SignedTransaction], uncles: &[Head
 }

 /// Enact the block given by `block_bytes` using `engine` on the database `db` with given `parent` block header
-pub fn enact_bytes(block_bytes: &[u8], engine: &Engine, tracing: bool, db: Box<JournalDB>, parent: &Header, last_hashes: LastHashes, vm_factory: &EvmFactory) -> Result<LockedBlock, Error> {
+pub fn enact_bytes(
+	block_bytes: &[u8],
+	engine: &Engine,
+	tracing: bool,
+	db: Box<JournalDB>,
+	parent: &Header,
+	last_hashes: LastHashes,
+	dao_rescue_block_gas_limit: Option<U256>,
+	vm_factory: &EvmFactory
+) -> Result<LockedBlock, Error> {
 	let block = BlockView::new(block_bytes);
 	let header = block.header();
-	enact(&header, &block.transactions(), &block.uncles(), engine, tracing, db, parent, last_hashes, vm_factory)
+	enact(&header, &block.transactions(), &block.uncles(), engine, tracing, db, parent, last_hashes, dao_rescue_block_gas_limit, vm_factory)
 }

 /// Enact the block given by `block_bytes` using `engine` on the database `db` with given `parent` block header
-pub fn enact_verified(block: &PreverifiedBlock, engine: &Engine, tracing: bool, db: Box<JournalDB>, parent: &Header, last_hashes: LastHashes, vm_factory: &EvmFactory) -> Result<LockedBlock, Error> {
+pub fn enact_verified(
+	block: &PreverifiedBlock,
+	engine: &Engine,
+	tracing: bool,
+	db: Box<JournalDB>,
+	parent: &Header,
+	last_hashes: LastHashes,
+	dao_rescue_block_gas_limit: Option<U256>,
+	vm_factory: &EvmFactory
+) -> Result<LockedBlock, Error> {
 	let view = BlockView::new(&block.bytes);
-	enact(&block.header, &block.transactions, &view.uncles(), engine, tracing, db, parent, last_hashes, vm_factory)
+	enact(&block.header, &block.transactions, &view.uncles(), engine, tracing, db, parent, last_hashes, dao_rescue_block_gas_limit, vm_factory)
 }

 /// Enact the block given by `block_bytes` using `engine` on the database `db` with given `parent` block header. Seal the block aferwards
-pub fn enact_and_seal(block_bytes: &[u8], engine: &Engine, tracing: bool, db: Box<JournalDB>, parent: &Header, last_hashes: LastHashes, vm_factory: &EvmFactory) -> Result<SealedBlock, Error> {
+pub fn enact_and_seal(
+	block_bytes: &[u8],
+	engine: &Engine,
+	tracing: bool,
+	db: Box<JournalDB>,
+	parent: &Header,
+	last_hashes: LastHashes,
+	dao_rescue_block_gas_limit: Option<U256>,
+	vm_factory: &EvmFactory
+) -> Result<SealedBlock, Error> {
 	let header = BlockView::new(block_bytes).header_view();
-	Ok(try!(try!(enact_bytes(block_bytes, engine, tracing, db, parent, last_hashes, vm_factory)).seal(engine, header.seal())))
+	Ok(try!(try!(enact_bytes(block_bytes, engine, tracing, db, parent, last_hashes, dao_rescue_block_gas_limit, vm_factory)).seal(engine, header.seal())))
 }

 #[cfg(test)]
@ -509,7 +551,7 @@ mod tests {
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let last_hashes = vec![genesis_header.hash()];
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, Address::zero(), 3141562.into(), vec![]).unwrap();
+		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, None, Address::zero(), 3141562.into(), vec![]).unwrap();
 		let b = b.close_and_lock();
 		let _ = b.seal(engine.deref(), vec![]);
 	}
@ -525,7 +567,7 @@ mod tests {
 		let mut db = db_result.take();
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, vec![genesis_header.hash()], Address::zero(), 3141562.into(), vec![]).unwrap()
+		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, vec![genesis_header.hash()], None, Address::zero(), 3141562.into(), vec![]).unwrap()
 			.close_and_lock().seal(engine.deref(), vec![]).unwrap();
 		let orig_bytes = b.rlp_bytes();
 		let orig_db = b.drain();
@ -533,7 +575,7 @@ mod tests {
 		let mut db_result = get_temp_journal_db();
 		let mut db = db_result.take();
 		spec.ensure_db_good(db.as_hashdb_mut());
-		let e = enact_and_seal(&orig_bytes, engine.deref(), false, db, &genesis_header, vec![genesis_header.hash()], &Default::default()).unwrap();
+		let e = enact_and_seal(&orig_bytes, engine.deref(), false, db, &genesis_header, vec![genesis_header.hash()], None, &Default::default()).unwrap();

 		assert_eq!(e.rlp_bytes(), orig_bytes);

@ -553,7 +595,7 @@ mod tests {
 		let mut db = db_result.take();
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let vm_factory = Default::default();
-		let mut open_block = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, vec![genesis_header.hash()], Address::zero(), 3141562.into(), vec![]).unwrap();
+		let mut open_block = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, vec![genesis_header.hash()], None, Address::zero(), 3141562.into(), vec![]).unwrap();
 		let mut uncle1_header = Header::new();
 		uncle1_header.extra_data = b"uncle1".to_vec();
 		let mut uncle2_header = Header::new();
@ -568,7 +610,7 @@ mod tests {
 		let mut db_result = get_temp_journal_db();
 		let mut db = db_result.take();
 		spec.ensure_db_good(db.as_hashdb_mut());
-		let e = enact_and_seal(&orig_bytes, engine.deref(), false, db, &genesis_header, vec![genesis_header.hash()], &Default::default()).unwrap();
+		let e = enact_and_seal(&orig_bytes, engine.deref(), false, db, &genesis_header, vec![genesis_header.hash()], None, &Default::default()).unwrap();

 		let bytes = e.rlp_bytes();
 		assert_eq!(bytes, orig_bytes);
--- a/ethcore/src/block_queue.rs
+++ b/ethcore/src/block_queue.rs
@ -130,7 +130,9 @@ impl QueueSignal {
 		}

 		if self.signalled.compare_and_swap(false, true, AtomicOrdering::Relaxed) == false {
-			self.message_channel.send(UserMessage(SyncMessage::BlockVerified)).expect("Error sending BlockVerified message");
+			if let Err(e) = self.message_channel.send(UserMessage(SyncMessage::BlockVerified)) {
+				debug!("Error sending BlockVerified message: {:?}", e);
+			}
 		}
 	}

--- a/ethcore/src/client/client.rs
+++ b/ethcore/src/client/client.rs
@ -230,7 +230,7 @@ impl<V> Client<V> where V: Verifier {
 		let last_hashes = self.build_last_hashes(header.parent_hash.clone());
 		let db = self.state_db.lock().unwrap().boxed_clone();

-		let enact_result = enact_verified(&block, engine, self.tracedb.tracing_enabled(), db, &parent, last_hashes, &self.vm_factory);
+		let enact_result = enact_verified(&block, engine, self.tracedb.tracing_enabled(), db, &parent, last_hashes, self.dao_rescue_block_gas_limit(), &self.vm_factory);
 		if let Err(e) = enact_result {
 			warn!(target: "client", "Block import failed for #{} ({})\nError: {:?}", header.number(), header.hash(), e);
 			return Err(());
@ -381,7 +381,7 @@ impl<V> Client<V> where V: Verifier {
 			balance: self.latest_balance(a),
 		};
 		let tx = transactions.iter().filter_map(|bytes| UntrustedRlp::new(&bytes).as_val().ok()).collect();
-		let results = self.miner.import_transactions(tx, fetch_account);
+		let results = self.miner.import_transactions(self, tx, fetch_account);
 		results.len()
 	}

@ -486,6 +486,7 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 			last_hashes: last_hashes,
 			gas_used: U256::zero(),
 			gas_limit: U256::max_value(),
+			dao_rescue_block_gas_limit: self.dao_rescue_block_gas_limit(),
 		};
 		// that's just a copy of the state.
 		let mut state = self.state();
@ -771,7 +772,7 @@ impl<V> BlockChainClient for Client<V> where V: Verifier {
 			nonce: self.latest_nonce(a),
 			balance: self.latest_balance(a),
 		};
-		self.miner.import_transactions(transactions, fetch_account)
+		self.miner.import_transactions(self, transactions, fetch_account)
 	}

 	fn queue_transactions(&self, transactions: Vec<Bytes>) {
@ -807,6 +808,7 @@ impl<V> MiningBlockChainClient for Client<V> where V: Verifier {
 			self.state_db.lock().unwrap().boxed_clone(),
 			&self.chain.block_header(&h).expect("h is best block hash: so it's header must exist: qed"),
 			self.build_last_hashes(h.clone()),
+			self.dao_rescue_block_gas_limit(),
 			author,
 			gas_floor_target,
 			extra_data,
--- a/ethcore/src/client/mod.rs
+++ b/ethcore/src/client/mod.rs
@ -42,7 +42,7 @@ use header::{BlockNumber, Header};
 use transaction::{LocalizedTransaction, SignedTransaction};
 use log_entry::LocalizedLogEntry;
 use filter::Filter;
-use views::BlockView;
+use views::{HeaderView, BlockView};
 use error::{ImportResult, ExecutionError};
 use receipt::LocalizedReceipt;
 use trace::LocalizedTrace;
@ -224,6 +224,13 @@ pub trait BlockChainClient : Sync + Send {
 			Err(())
 		}
 	}
+
+
+	/// Get `Some` gas limit of block 1_760_000, or `None` if chain is not yet that long.
+	fn dao_rescue_block_gas_limit(&self) -> Option<U256> {
+		self.block_header(BlockID::Number(1_760_000))
+			.map(|header| HeaderView::new(&header).gas_limit())
+	}	
 }

 /// Extended client interface used for mining
--- a/ethcore/src/client/test_client.rs
+++ b/ethcore/src/client/test_client.rs
@ -490,7 +490,7 @@ impl BlockChainClient for TestBlockChainClient {
 			balance: balances[a],
 		};

-		self.miner.import_transactions(transactions, &fetch_account)
+		self.miner.import_transactions(self, transactions, &fetch_account)
 	}

 	fn queue_transactions(&self, transactions: Vec<Bytes>) {
--- a/ethcore/src/env_info.rs
+++ b/ethcore/src/env_info.rs
@ -39,6 +39,9 @@ pub struct EnvInfo {
 	pub last_hashes: LastHashes,
 	/// The gas used.
 	pub gas_used: U256,
+
+	/// Block gas limit at DAO rescue block #1760000 or None if not yet there.
+	pub dao_rescue_block_gas_limit: Option<U256>,
 }

 impl Default for EnvInfo {
@ -51,6 +54,7 @@ impl Default for EnvInfo {
 			gas_limit: 0.into(),
 			last_hashes: vec![],
 			gas_used: 0.into(),
+			dao_rescue_block_gas_limit: None,
 		}
 	}
 }
@ -66,6 +70,7 @@ impl From<ethjson::vm::Env> for EnvInfo {
 			timestamp: e.timestamp.into(),
 			last_hashes: (1..cmp::min(number + 1, 257)).map(|i| format!("{}", number - i).as_bytes().sha3()).collect(),
 			gas_used: U256::zero(),
+			dao_rescue_block_gas_limit: None,
 		}
 	}
 }
--- a/ethcore/src/ethereum/ethash.rs
+++ b/ethcore/src/ethereum/ethash.rs
@ -41,6 +41,8 @@ pub struct EthashParams {
 	pub registrar: Address,
 	/// Homestead transition block number.
 	pub frontier_compatibility_mode_limit: u64,
+	/// Enable the soft-fork logic.
+	pub dao_rescue_soft_fork: bool,
 }

 impl From<ethjson::spec::EthashParams> for EthashParams {
@ -53,6 +55,7 @@ impl From<ethjson::spec::EthashParams> for EthashParams {
 			block_reward: p.block_reward.into(),
 			registrar: p.registrar.into(),
 			frontier_compatibility_mode_limit: p.frontier_compatibility_mode_limit.into(),
+			dao_rescue_soft_fork: p.dao_rescue_soft_fork.into(),
 		}
 	}
 }
@ -102,8 +105,9 @@ impl Engine for Ethash {
 			Schedule::new_frontier()
 		} else {
 			let mut s = Schedule::new_homestead();
-			// TODO: make dependent on gaslimit > 4000000 of block 1760000.	
-			s.reject_dao_transactions = env_info.number >= 1760000;
+			if self.ethash_params.dao_rescue_soft_fork {
+				s.reject_dao_transactions = env_info.dao_rescue_block_gas_limit.map(|x| x <= 4_000_000.into()).unwrap_or(false);
+			}
 			s
 		}
 	}
@ -319,7 +323,7 @@ mod tests {
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let last_hashes = vec![genesis_header.hash()];
 		let vm_factory = Default::default();
-		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, Address::zero(), 3141562.into(), vec![]).unwrap();
+		let b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, None, Address::zero(), 3141562.into(), vec![]).unwrap();
 		let b = b.close();
 		assert_eq!(b.state().balance(&Address::zero()), U256::from_str("4563918244f40000").unwrap());
 	}
@ -334,7 +338,7 @@ mod tests {
 		spec.ensure_db_good(db.as_hashdb_mut());
 		let last_hashes = vec![genesis_header.hash()];
 		let vm_factory = Default::default();
-		let mut b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, Address::zero(), 3141562.into(), vec![]).unwrap();
+		let mut b = OpenBlock::new(engine.deref(), &vm_factory, false, db, &genesis_header, last_hashes, None, Address::zero(), 3141562.into(), vec![]).unwrap();
 		let mut uncle = Header::new();
 		let uncle_author = address_from_hex("ef2d6d194084c2de36e0dabfce45d046b37d1106");
 		uncle.author = uncle_author.clone();
@ -362,7 +366,8 @@ mod tests {
 			difficulty: 0.into(),
 			last_hashes: vec![],
 			gas_used: 0.into(),
-			gas_limit: 0.into()
+			gas_limit: 0.into(),
+			dao_rescue_block_gas_limit: None,
 		});

 		assert!(schedule.stack_limit > 0);
@ -374,7 +379,8 @@ mod tests {
 			difficulty: 0.into(),
 			last_hashes: vec![],
 			gas_used: 0.into(),
-			gas_limit: 0.into()
+			gas_limit: 0.into(),
+			dao_rescue_block_gas_limit: None,
 		});

 		assert!(!schedule.have_delegate_call);
--- a/ethcore/src/ethereum/mod.rs
+++ b/ethcore/src/ethereum/mod.rs
@ -33,7 +33,12 @@ use super::spec::*;
 pub fn new_olympic() -> Spec { Spec::load(include_bytes!("../../res/ethereum/olympic.json")) }

 /// Create a new Frontier mainnet chain spec.
-pub fn new_frontier() -> Spec { Spec::load(include_bytes!("../../res/ethereum/frontier.json")) }
+pub fn new_frontier(dao_rescue: bool) -> Spec {
+	Spec::load(match dao_rescue {
+		true => include_bytes!("../../res/ethereum/frontier_dao_rescue.json"),
+		false => include_bytes!("../../res/ethereum/frontier.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")) }
@ -84,7 +89,7 @@ mod tests {

 	#[test]
 	fn frontier() {
-		let frontier = new_frontier();
+		let frontier = new_frontier(true);

 		assert_eq!(frontier.state_root(), H256::from_str("d7f8974fb5ac78d9ac099b9ad5018bedc2ce0a72dad1827a1709da30580f0544").unwrap());
 		let genesis = frontier.genesis_block();
--- a/ethcore/src/externalities.rs
+++ b/ethcore/src/externalities.rs
@ -318,7 +318,8 @@ mod tests {
 			difficulty: 0.into(),
 			last_hashes: vec![],
 			gas_used: 0.into(),
-			gas_limit: 0.into()
+			gas_limit: 0.into(),
+			dao_rescue_block_gas_limit: None,
 		}
 	}

--- a/ethcore/src/miner/miner.rs
+++ b/ethcore/src/miner/miner.rs
@ -106,34 +106,37 @@ impl Miner {
 	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
 	fn prepare_sealing(&self, chain: &MiningBlockChainClient) {
 		trace!(target: "miner", "prepare_sealing: entering");
-		let transactions = self.transaction_queue.lock().unwrap().top_transactions();
-		let mut sealing_work = self.sealing_work.lock().unwrap();
-		let best_hash = chain.best_block_header().sha3();

+		let (transactions, mut open_block) = {
+			let transactions = {self.transaction_queue.lock().unwrap().top_transactions()};
+			let mut sealing_work = self.sealing_work.lock().unwrap();
+			let best_hash = chain.best_block_header().sha3();
 /*
-		// check to see if last ClosedBlock in would_seals is actually same parent block.
-		// if so
-		//   duplicate, re-open and push any new transactions.
-		//   if at least one was pushed successfully, close and enqueue new ClosedBlock;
-		//   otherwise, leave everything alone.
-		// otherwise, author a fresh block.
+			// check to see if last ClosedBlock in would_seals is actually same parent block.
+			// if so
+			//   duplicate, re-open and push any new transactions.
+			//   if at least one was pushed successfully, close and enqueue new ClosedBlock;
+			//   otherwise, leave everything alone.
+			// otherwise, author a fresh block.
 */
-		let mut open_block = match sealing_work.pop_if(|b| b.block().fields().header.parent_hash() == &best_hash) {
-			Some(old_block) => {
-				trace!(target: "miner", "Already have previous work; updating and returning");
-				// add transactions to old_block
-				let e = self.engine();
-				old_block.reopen(e, chain.vm_factory())
-			}
-			None => {
-				// block not found - create it.
-				trace!(target: "miner", "No existing work - making new block");
-				chain.prepare_open_block(
-					self.author(),
-					self.gas_floor_target(),
-					self.extra_data()
-				)
-			}
+			let open_block = match sealing_work.pop_if(|b| b.block().fields().header.parent_hash() == &best_hash) {
+				Some(old_block) => {
+					trace!(target: "miner", "Already have previous work; updating and returning");
+					// add transactions to old_block
+					let e = self.engine();
+					old_block.reopen(e, chain.vm_factory())
+				}
+				None => {
+					// block not found - create it.
+					trace!(target: "miner", "No existing work - making new block");
+					chain.prepare_open_block(
+						self.author(),
+						self.gas_floor_target(),
+						self.extra_data()
+					)
+				}
+			};
+			(transactions, open_block)
 		};

 		let mut invalid_transactions = HashSet::new();
@ -163,14 +166,16 @@ impl Miner {

 		let block = open_block.close();

-		let mut queue = self.transaction_queue.lock().unwrap();
 		let fetch_account = |a: &Address| AccountDetails {
 			nonce: chain.latest_nonce(a),
 			balance: chain.latest_balance(a),
 		};

-		for hash in invalid_transactions.into_iter() {
-			queue.remove_invalid(&hash, &fetch_account);
+		{
+			let mut queue = self.transaction_queue.lock().unwrap();
+			for hash in invalid_transactions.into_iter() {
+				queue.remove_invalid(&hash, &fetch_account);
+			}
 		}

 		if !block.transactions().is_empty() {
@ -196,6 +201,8 @@ impl Miner {
 				trace!(target: "miner", "prepare_sealing: unable to generate seal internally");
 			}
 		}
+
+		let mut sealing_work = self.sealing_work.lock().unwrap();
 		if sealing_work.peek_last_ref().map_or(true, |pb| pb.block().fields().header.hash() != block.block().fields().header.hash()) {
 			trace!(target: "miner", "Pushing a new, refreshed or borrowed pending {}...", block.block().fields().header.hash());
 			sealing_work.push(block);
@ -267,6 +274,7 @@ impl MinerService for Miner {
 					last_hashes: last_hashes,
 					gas_used: U256::zero(),
 					gas_limit: U256::max_value(),
+					dao_rescue_block_gas_limit: chain.dao_rescue_block_gas_limit(),
 				};
 				// that's just a copy of the state.
 				let mut state = block.state().clone();
@ -376,13 +384,19 @@ impl MinerService for Miner {
 		*self.gas_floor_target.read().unwrap()
 	}

-	fn import_transactions<T>(&self, transactions: Vec<SignedTransaction>, fetch_account: T) ->
+	fn import_transactions<T>(&self, chain: &MiningBlockChainClient, transactions: Vec<SignedTransaction>, fetch_account: T) ->
 		Vec<Result<TransactionImportResult, Error>>
 		where T: Fn(&Address) -> AccountDetails {
-		let mut transaction_queue = self.transaction_queue.lock().unwrap();
-		transactions.into_iter()
-			.map(|tx| transaction_queue.add(tx, &fetch_account, TransactionOrigin::External))
-			.collect()
+		let results: Vec<Result<TransactionImportResult, Error>> = {
+			let mut transaction_queue = self.transaction_queue.lock().unwrap();
+			transactions.into_iter()
+				.map(|tx| transaction_queue.add(tx, &fetch_account, TransactionOrigin::External))
+				.collect()
+		};
+		if !results.is_empty() {
+			self.update_sealing(chain);
+		}
+		results
 	}

 	fn import_own_transaction<T>(
@ -564,7 +578,7 @@ impl MinerService for Miner {
 				for tx in &txs {
 					let _sender = tx.sender();
 				}
-				let _ = self.import_transactions(txs, |a| AccountDetails {
+				let _ = self.import_transactions(chain, txs, |a| AccountDetails {
 					nonce: chain.latest_nonce(a),
 					balance: chain.latest_balance(a),
 				});
--- a/ethcore/src/miner/mod.rs
+++ b/ethcore/src/miner/mod.rs
@ -94,7 +94,7 @@ pub trait MinerService : Send + Sync {
 	fn set_transactions_limit(&self, limit: usize);

 	/// Imports transactions to transaction queue.
-	fn import_transactions<T>(&self, transactions: Vec<SignedTransaction>, fetch_account: T) ->
+	fn import_transactions<T>(&self, chain: &MiningBlockChainClient, transactions: Vec<SignedTransaction>, fetch_account: T) ->
 		Vec<Result<TransactionImportResult, Error>>
 		where T: Fn(&Address) -> AccountDetails, Self: Sized;

--- a/ethcore/src/miner/transaction_queue.rs
+++ b/ethcore/src/miner/transaction_queue.rs
@ -657,8 +657,14 @@ impl TransactionQueue {
 			.cloned()
 			.map_or(state_nonce, |n| n + U256::one());

-		// Check height
-		if nonce > next_nonce {
+		// The transaction might be old, let's check that.
+		// This has to be the first test, otherwise calculating
+		// nonce height would result in overflow.
+		if nonce < state_nonce {
+			// Droping transaction
+			trace!(target: "miner", "Dropping old transaction: {:?} (nonce: {} < {})", tx.hash(), nonce, next_nonce);
+			return Err(TransactionError::Old);
+		} else if nonce > next_nonce {
 			// We have a gap - put to future.
 			// Update nonces of transactions in future (remove old transactions)
 			self.update_future(&address, state_nonce);
@ -667,12 +673,7 @@ impl TransactionQueue {
 			// Return an error if this transaction is not imported because of limit.
 			try!(check_if_removed(&address, &nonce, self.future.enforce_limit(&mut self.by_hash)));
 			return Ok(TransactionImportResult::Future);
-		} else if nonce < state_nonce {
-			// Droping transaction
-			trace!(target: "miner", "Dropping old transaction: {:?} (nonce: {} < {})", tx.hash(), nonce, next_nonce);
-			return Err(TransactionError::Old);
 		}
-
 		try!(check_too_cheap(Self::replace_transaction(tx, state_nonce, &mut self.current, &mut self.by_hash)));
 		// Keep track of highest nonce stored in current
 		let new_max = self.last_nonces.get(&address).map_or(nonce, |n| cmp::max(nonce, *n));
--- a/ethcore/src/state.rs
+++ b/ethcore/src/state.rs
@ -222,19 +222,25 @@ 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("7278d050619a624f84f51987149ddb439cdaadfba5966f7cfaea7ad44340a4ba");
+		let broken_dao = H256::from("6a5d24750f78441e56fec050dc52fe8e911976485b7472faac7464a176a67caa");

 		// dao attack soft fork
 		if engine.schedule(&env_info).reject_dao_transactions {
-			// collect all the addresses which have changed.
-			let addresses = self.cache.borrow().iter().map(|(addr, _)| addr.clone()).collect::<Vec<_>>();
+			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 = SecTrieDB::new(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));
+				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 = SecTrieDB::new(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));
+						}
 					}
 				}
 			}
--- a/ethcore/src/tests/helpers.rs
+++ b/ethcore/src/tests/helpers.rs
@ -179,6 +179,7 @@ pub fn generate_dummy_client_with_spec_and_data<F>(get_test_spec: F, block_numbe
 			db,
 			&last_header,
 			last_hashes.clone(),
+			None,
 			author.clone(),
 			3141562.into(),
 			vec![]
--- a/json/src/spec/engine.rs
+++ b/json/src/spec/engine.rs
@ -53,7 +53,8 @@ mod tests {
 					"durationLimit": "0x0d",
 					"blockReward": "0x4563918244F40000",
 					"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-					"frontierCompatibilityModeLimit" : "0x"
+					"frontierCompatibilityModeLimit" : "0x",
+					"daoRescueSoftFork": true
 				}
 			}
 		}"#;
--- a/json/src/spec/ethash.rs
+++ b/json/src/spec/ethash.rs
@ -42,6 +42,9 @@ pub struct EthashParams {
 	/// Homestead transition block number.
 	#[serde(rename="frontierCompatibilityModeLimit")]
 	pub frontier_compatibility_mode_limit: Uint,
+	/// DAO rescue soft-fork?
+	#[serde(rename="daoRescueSoftFork")]
+	pub dao_rescue_soft_fork: bool,
 }

 /// Ethash engine deserialization.
@ -65,8 +68,9 @@ mod tests {
 				"difficultyBoundDivisor": "0x0800",
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
-				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit" : "0x42"
+				"registrar": "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
+				"frontierCompatibilityModeLimit": "0x42",
+				"daoRescueSoftFork": true
 			}
 		}"#;

--- a/json/src/spec/spec.rs
+++ b/json/src/spec/spec.rs
@ -63,7 +63,8 @@ mod tests {
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit" : "0x"
+				"frontierCompatibilityModeLimit" : "0x",
+				"daoRescueSoftFork": false
 			}
 		}
 	},
--- a/parity/cli.rs
+++ b/parity/cli.rs
@ -43,12 +43,20 @@ Protocol Options:
                           [default: $HOME/.parity/keys].
  --identity NAME          Specify your node's name.

+DAO-Rescue Soft-fork Options:
+  --help-rescue-dao        Does nothing - on by default.
+  --dont-help-rescue-dao   Votes against the DAO-rescue soft-fork, but supports
+                           it if it is triggered anyway.
+                           Equivalent to --gas-floor-target=3141592.
+  --dogmatic               Ignores all DAO-rescue soft-fork behaviour. Even if
+                           it means losing mining rewards.
+
 Account Options:
  --unlock ACCOUNTS        Unlock ACCOUNTS for the duration of the execution.
                           ACCOUNTS is a comma-delimited list of addresses.
  --password FILE          Provide a file containing a password for unlocking
                           an account.
-  --keys-iterations NUM    Specify the number of iterations to use when
+  --keys-iterations NUM    Specify the number of iterations to use when 
                           deriving key from the password (bigger is more
                           secure) [default: 10240].
  --no-import-keys         Do not import keys from legacy clients.
@ -230,6 +238,8 @@ pub struct Args {
 	pub flag_chain: String,
 	pub flag_db_path: String,
 	pub flag_identity: String,
+	pub flag_dont_help_rescue_dao: bool,
+	pub flag_dogmatic: bool,
 	pub flag_unlock: Option<String>,
 	pub flag_password: Vec<String>,
 	pub flag_cache: Option<usize>,
--- a/parity/configuration.rs
+++ b/parity/configuration.rs
@ -75,12 +75,18 @@ impl Configuration {
 	}

 	pub fn gas_floor_target(&self) -> U256 {
-		let d = &self.args.flag_gas_floor_target;
-		U256::from_dec_str(d).unwrap_or_else(|_| {
-			die!("{}: Invalid target gas floor given. Must be a decimal unsigned 256-bit number.", d)
-		})
+		if self.args.flag_dont_help_rescue_dao || self.args.flag_dogmatic {
+			4_700_000.into()
+		} else {
+			let d = &self.args.flag_gas_floor_target;
+			U256::from_dec_str(d).unwrap_or_else(|_| {
+				die!("{}: Invalid target gas floor given. Must be a decimal unsigned 256-bit number.", d)
+			})
+		}
 	}

+
+
 	pub fn gas_price(&self) -> U256 {
 		match self.args.flag_gasprice.as_ref() {
 			Some(d) => {
@ -115,16 +121,20 @@ impl Configuration {
 	}

 	pub fn extra_data(&self) -> Bytes {
-		match self.args.flag_extradata.as_ref().or(self.args.flag_extra_data.as_ref()) {
-			Some(ref x) if x.len() <= 32 => x.as_bytes().to_owned(),
-			None => version_data(),
-			Some(ref x) => { die!("{}: Extra data must be at most 32 characters.", x); }
+		if !self.args.flag_dont_help_rescue_dao {
+			(b"rescuedao"[..]).to_owned()
+		} else {
+			match self.args.flag_extradata.as_ref().or(self.args.flag_extra_data.as_ref()) {
+				Some(ref x) if x.len() <= 32 => x.as_bytes().to_owned(),
+				None => version_data(),
+				Some(ref x) => { die!("{}: Extra data must be at most 32 characters.", x); }
+			}
 		}
 	}

 	pub fn spec(&self) -> Spec {
 		match self.chain().as_str() {
-			"frontier" | "homestead" | "mainnet" => ethereum::new_frontier(),
+			"frontier" | "homestead" | "mainnet" => ethereum::new_frontier(!self.args.flag_dogmatic),
 			"morden" | "testnet" => ethereum::new_morden(),
 			"olympic" => ethereum::new_olympic(),
 			f => Spec::load(contents(f).unwrap_or_else(|_| {
@ -155,7 +165,6 @@ impl Configuration {

 	pub fn init_reserved_nodes(&self) -> Vec<String> {
 		use std::fs::File;
-		use std::io::BufRead;

 		if let Some(ref path) = self.args.flag_reserved_peers {
 			let mut buffer = String::new();
--- a/parity/rpc_apis.rs
+++ b/parity/rpc_apis.rs
@ -150,7 +150,7 @@ pub fn setup_rpc<T: Extendable>(server: T, deps: Arc<Dependencies>, apis: ApiSet
 				server.add_delegate(EthFilterClient::new(&deps.client, &deps.miner).to_delegate());

 				if deps.signer_port.is_some() {
-					server.add_delegate(EthSigningQueueClient::new(&deps.signer_queue, &deps.miner).to_delegate());
+					server.add_delegate(EthSigningQueueClient::new(&deps.signer_queue, &deps.client, &deps.miner).to_delegate());
 				} else {
 					server.add_delegate(EthSigningUnsafeClient::new(&deps.client, &deps.secret_store, &deps.miner).to_delegate());
 				}
@ -162,7 +162,8 @@ pub fn setup_rpc<T: Extendable>(server: T, deps: Arc<Dependencies>, apis: ApiSet
 				server.add_delegate(SignerClient::new(&deps.secret_store, &deps.client, &deps.miner, &deps.signer_queue).to_delegate());
 			},
 			Api::Ethcore => {
-				server.add_delegate(EthcoreClient::new(&deps.client, &deps.miner, deps.logger.clone(), deps.settings.clone()).to_delegate())
+				let queue = deps.signer_port.map(|_| deps.signer_queue.clone());
+				server.add_delegate(EthcoreClient::new(&deps.client, &deps.miner, deps.logger.clone(), deps.settings.clone(), queue).to_delegate())
 			},
 			Api::EthcoreSet => {
 				server.add_delegate(EthcoreSetClient::new(&deps.miner, &deps.net_service).to_delegate())
--- a/rpc/src/v1/helpers/signing_queue.rs
+++ b/rpc/src/v1/helpers/signing_queue.rs
@ -69,6 +69,12 @@ pub trait SigningQueue: Send + Sync {

 	/// Return copy of all the requests in the queue.
 	fn requests(&self) -> Vec<TransactionConfirmation>;
+
+	/// Returns number of transactions awaiting confirmation.
+	fn len(&self) -> usize;
+
+	/// Returns true if there are no transactions awaiting confirmation.
+	fn is_empty(&self) -> bool;
 }

 #[derive(Debug, PartialEq)]
@ -277,6 +283,16 @@ impl SigningQueue for  ConfirmationsQueue {
 		let queue = self.queue.read().unwrap();
 		queue.values().map(|token| token.request.clone()).collect()
 	}
+
+	fn len(&self) -> usize {
+		let queue = self.queue.read().unwrap();
+		queue.len()
+	}
+
+	fn is_empty(&self) -> bool {
+		let queue = self.queue.read().unwrap();
+		queue.is_empty()
+	}
 }


--- a/rpc/src/v1/impls/eth.rs
+++ b/rpc/src/v1/impls/eth.rs
@ -37,7 +37,7 @@ use ethcore::filter::Filter as EthcoreFilter;
 use self::ethash::SeedHashCompute;
 use v1::traits::Eth;
 use v1::types::{Block, BlockTransactions, BlockNumber, Bytes, SyncStatus, SyncInfo, Transaction, CallRequest, OptionalValue, Index, Filter, Log, Receipt};
-use v1::impls::{dispatch_transaction, error_codes};
+use v1::impls::{default_gas_price, dispatch_transaction, error_codes};
 use serde;

 /// Eth rpc implementation.
@ -153,23 +153,14 @@ impl<C, S, M, EM> EthClient<C, S, M, EM> where
 		}
 	}

-	fn default_gas_price(&self) -> Result<U256, Error> {
-		let miner = take_weak!(self.miner);
-		Ok(take_weak!(self.client)
-			.gas_price_statistics(100, 8)
-			.map(|x| x[4])
-			.unwrap_or_else(|_| miner.sensible_gas_price())
-		)
-	}
-
 	fn sign_call(&self, request: CallRequest) -> Result<SignedTransaction, Error> {
-		let client = take_weak!(self.client);
+		let (client, miner) = (take_weak!(self.client), take_weak!(self.miner));
 		let from = request.from.unwrap_or(Address::zero());
 		Ok(EthTransaction {
 			nonce: request.nonce.unwrap_or_else(|| client.latest_nonce(&from)),
 			action: request.to.map_or(Action::Create, Action::Call),
 			gas: request.gas.unwrap_or(U256::from(50_000_000)),
-			gas_price: request.gas_price.unwrap_or_else(|| self.default_gas_price().expect("call only fails if client or miner are unavailable; client and miner are both available to be here; qed")),
+			gas_price: request.gas_price.unwrap_or_else(|| default_gas_price(&*client, &*miner)),
 			value: request.value.unwrap_or_else(U256::zero),
 			data: request.data.map_or_else(Vec::new, |d| d.to_vec())
 		}.fake_sign(from))
@ -296,7 +287,10 @@ impl<C, S, M, EM> Eth for EthClient<C, S, M, EM> where

 	fn gas_price(&self, params: Params) -> Result<Value, Error> {
 		match params {
-			Params::None => to_value(&try!(self.default_gas_price())),
+			Params::None => {
+				let (client, miner) = (take_weak!(self.client), take_weak!(self.miner));
+				to_value(&default_gas_price(&*client, &*miner))
+			}
 			_ => Err(Error::invalid_params())
 		}
 	}
--- a/rpc/src/v1/impls/eth_signing.rs
+++ b/rpc/src/v1/impls/eth_signing.rs
@ -25,38 +25,42 @@ use ethcore::account_provider::AccountProvider;
 use v1::helpers::{SigningQueue, ConfirmationsQueue};
 use v1::traits::EthSigning;
 use v1::types::{TransactionRequest, Bytes};
-use v1::impls::sign_and_dispatch;
+use v1::impls::{default_gas_price, sign_and_dispatch};
+
+fn fill_optional_fields<C, M>(request: &mut TransactionRequest, client: &C, miner: &M)
+	where C: MiningBlockChainClient, M: MinerService {
+	if request.gas.is_none() {
+		request.gas = Some(miner.sensible_gas_limit());
+	}
+	if request.gas_price.is_none() {
+		request.gas_price = Some(default_gas_price(client, miner));
+	}
+	if request.data.is_none() {
+		request.data = Some(Bytes::new(Vec::new()));
+	}
+}

 /// Implementation of functions that require signing when no trusted signer is used.
-pub struct EthSigningQueueClient<M: MinerService> {
+pub struct EthSigningQueueClient<C, M> where C: MiningBlockChainClient, M: MinerService {
 	queue: Weak<ConfirmationsQueue>,
+	client: Weak<C>,
 	miner: Weak<M>,
 }

-impl<M: MinerService> EthSigningQueueClient<M> {
+impl<C, M> EthSigningQueueClient<C, M> where C: MiningBlockChainClient, M: MinerService {
 	/// Creates a new signing queue client given shared signing queue.
-	pub fn new(queue: &Arc<ConfirmationsQueue>, miner: &Arc<M>) -> Self {
+	pub fn new(queue: &Arc<ConfirmationsQueue>, client: &Arc<C>, miner: &Arc<M>) -> Self {
 		EthSigningQueueClient {
 			queue: Arc::downgrade(queue),
+			client: Arc::downgrade(client),
 			miner: Arc::downgrade(miner),
 		}
 	}
-
-	fn fill_optional_fields(&self, miner: Arc<M>, mut request: TransactionRequest) -> TransactionRequest {
-		if let None = request.gas {
-			request.gas = Some(miner.sensible_gas_limit());
-		}
-		if let None = request.gas_price {
-			request.gas_price = Some(miner.sensible_gas_price());
-		}
-		if let None = request.data {
-			request.data = Some(Bytes::new(Vec::new()));
-		}
-		request
-	}
 }

-impl<M: MinerService + 'static> EthSigning for EthSigningQueueClient<M>  {
+impl<C, M> EthSigning for EthSigningQueueClient<C, M>
+	where C: MiningBlockChainClient + 'static, M: MinerService + 'static
+{

 	fn sign(&self, _params: Params) -> Result<Value, Error> {
 		warn!("Invoking eth_sign is not yet supported with signer enabled.");
@ -66,10 +70,11 @@ impl<M: MinerService + 'static> EthSigning for EthSigningQueueClient<M>  {

 	fn send_transaction(&self, params: Params) -> Result<Value, Error> {
 		from_params::<(TransactionRequest, )>(params)
-			.and_then(|(request, )| {
+			.and_then(|(mut request, )| {
 				let queue = take_weak!(self.queue);
-				let miner = take_weak!(self.miner);
-				let request = self.fill_optional_fields(miner, request);
+				let (client, miner) = (take_weak!(self.client), take_weak!(self.miner));
+
+				fill_optional_fields(&mut request, &*client, &*miner);
 				let id = queue.add_request(request);
 				let result = id.wait_with_timeout();
 				result.unwrap_or_else(|| to_value(&H256::new()))
--- a/rpc/src/v1/impls/ethcore.rs
+++ b/rpc/src/v1/impls/ethcore.rs
@ -26,6 +26,8 @@ use jsonrpc_core::*;
 use ethcore::miner::MinerService;
 use v1::traits::Ethcore;
 use v1::types::{Bytes};
+use v1::helpers::{SigningQueue, ConfirmationsQueue};
+use v1::impls::error_codes;

 /// Ethcore implementation.
 pub struct EthcoreClient<C, M> where
@ -36,16 +38,18 @@ pub struct EthcoreClient<C, M> where
 	miner: Weak<M>,
 	logger: Arc<RotatingLogger>,
 	settings: Arc<NetworkSettings>,
+	confirmations_queue: Option<Arc<ConfirmationsQueue>>,
 }

 impl<C, M> EthcoreClient<C, M> where C: MiningBlockChainClient, M: MinerService {
 	/// Creates new `EthcoreClient`.
-	pub fn new(client: &Arc<C>, miner: &Arc<M>, logger: Arc<RotatingLogger>, settings: Arc<NetworkSettings>) -> Self {
+	pub fn new(client: &Arc<C>, miner: &Arc<M>, logger: Arc<RotatingLogger>, settings: Arc<NetworkSettings>, queue: Option<Arc<ConfirmationsQueue>>) -> Self {
 		EthcoreClient {
 			client: Arc::downgrade(client),
 			miner: Arc::downgrade(miner),
 			logger: logger,
 			settings: settings,
+			confirmations_queue: queue,
 		}
 	}
 }
@ -120,4 +124,15 @@ impl<C, M> Ethcore for EthcoreClient<C, M> where M: MinerService + 'static, C: M
 			_ => Err(Error::invalid_params()),
 		}
 	}
+
+	fn unsigned_transactions_count(&self, _params: Params) -> Result<Value, Error> {
+		match self.confirmations_queue {
+			None => Err(Error {
+				code: ErrorCode::ServerError(error_codes::SIGNER_DISABLED),
+				message: "Trusted Signer is disabled. This API is not available.".into(),
+				data: None
+			}),
+			Some(ref queue) => to_value(&queue.len()),
+		}
+	}
 }
--- a/rpc/src/v1/impls/mod.rs
+++ b/rpc/src/v1/impls/mod.rs
@ -71,6 +71,7 @@ mod error_codes {
 	pub const UNKNOWN_ERROR: i64 = -32002;
 	pub const TRANSACTION_ERROR: i64 = -32010;
 	pub const ACCOUNT_LOCKED: i64 = -32020;
+	pub const SIGNER_DISABLED: i64 = -32030;
 }

 fn dispatch_transaction<C, M>(client: &C, miner: &M, signed_transaction: SignedTransaction) -> Result<Value, Error>
@ -99,7 +100,7 @@ fn prepare_transaction<C, M>(client: &C, miner: &M, request: TransactionRequest)

 		action: request.to.map_or(Action::Create, Action::Call),
 		gas: request.gas.unwrap_or_else(|| miner.sensible_gas_limit()),
-		gas_price: request.gas_price.unwrap_or_else(|| miner.sensible_gas_price()),
+		gas_price: request.gas_price.unwrap_or_else(|| default_gas_price(client, miner)),
 		value: request.value.unwrap_or_else(U256::zero),
 		data: request.data.map_or_else(Vec::new, |b| b.to_vec()),
 	}
@ -133,6 +134,14 @@ fn sign_and_dispatch<C, M>(client: &C, miner: &M, request: TransactionRequest, a
 	dispatch_transaction(&*client, &*miner, signed_transaction)
 }

+fn default_gas_price<C, M>(client: &C, miner: &M) -> U256 where C: MiningBlockChainClient, M: MinerService {
+	client
+		.gas_price_statistics(100, 8)
+		.map(|x| x[4])
+		.unwrap_or_else(|_| miner.sensible_gas_price())
+}
+
+
 fn signing_error(error: AccountError) -> Error {
 	Error {
 		code: ErrorCode::ServerError(error_codes::ACCOUNT_LOCKED),
--- a/rpc/src/v1/tests/eth.rs
+++ b/rpc/src/v1/tests/eth.rs
@ -183,7 +183,8 @@ const TRANSACTION_COUNT_SPEC: &'static [u8] = br#"{
 				"durationLimit": "0x0d",
 				"blockReward": "0x4563918244F40000",
 				"registrar" : "0xc6d9d2cd449a754c494264e1809c50e34d64562b",
-				"frontierCompatibilityModeLimit": "0xffffffffffffffff"
+				"frontierCompatibilityModeLimit": "0xffffffffffffffff",
+				"daoRescueSoftFork": false
 			}
 		}
 	},
--- a/rpc/src/v1/tests/helpers/miner_service.rs
+++ b/rpc/src/v1/tests/helpers/miner_service.rs
@ -115,7 +115,7 @@ impl MinerService for TestMinerService {
 	}

 	/// Imports transactions to transaction queue.
-	fn import_transactions<T>(&self, transactions: Vec<SignedTransaction>, fetch_account: T) ->
+	fn import_transactions<T>(&self, _chain: &MiningBlockChainClient, transactions: Vec<SignedTransaction>, fetch_account: T) ->
 		Vec<Result<TransactionImportResult, Error>>
 		where T: Fn(&Address) -> AccountDetails {
 		// lets assume that all txs are valid
--- a/rpc/src/v1/tests/mocked/eth_signing.rs
+++ b/rpc/src/v1/tests/mocked/eth_signing.rs
@ -21,9 +21,11 @@ use v1::traits::EthSigning;
 use v1::helpers::{ConfirmationsQueue, SigningQueue};
 use v1::tests::helpers::TestMinerService;
 use util::{Address, FixedHash};
+use ethcore::client::TestBlockChainClient;

 struct EthSigningTester {
 	pub queue: Arc<ConfirmationsQueue>,
+	pub client: Arc<TestBlockChainClient>,
 	pub miner: Arc<TestMinerService>,
 	pub io: IoHandler,
 }
@ -31,12 +33,14 @@ struct EthSigningTester {
 impl Default for EthSigningTester {
 	fn default() -> Self {
 		let queue = Arc::new(ConfirmationsQueue::default());
+		let client = Arc::new(TestBlockChainClient::default());
 		let miner = Arc::new(TestMinerService::default());
 		let io = IoHandler::new();
-		io.add_delegate(EthSigningQueueClient::new(&queue, &miner).to_delegate());
+		io.add_delegate(EthSigningQueueClient::new(&queue, &client, &miner).to_delegate());

 		EthSigningTester {
 			queue: queue,
+			client: client,
 			miner: miner,
 			io: io,
 		}
--- a/rpc/src/v1/tests/mocked/ethcore.rs
+++ b/rpc/src/v1/tests/mocked/ethcore.rs
@ -15,17 +15,12 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

 use std::sync::Arc;
-use std::str::FromStr;
 use jsonrpc_core::IoHandler;
-use v1::{Ethcore, EthcoreClient, EthcoreSet, EthcoreSetClient};
-use ethcore::miner::MinerService;
-use ethcore::service::SyncMessage;
+use v1::{Ethcore, EthcoreClient};
 use v1::tests::helpers::TestMinerService;
+use v1::helpers::ConfirmationsQueue;
 use ethcore::client::{TestBlockChainClient};
-use util::numbers::*;
-use rustc_serialize::hex::FromHex;
 use util::log::RotatingLogger;
-use util::network::{NetworkConfiguration, NetworkService};
 use util::network_settings::NetworkSettings;

 fn miner_service() -> Arc<TestMinerService> {
@ -52,26 +47,16 @@ fn settings() -> Arc<NetworkSettings> {
 	})
 }

-fn network_service() -> Arc<NetworkService<SyncMessage>> {
-	Arc::new(NetworkService::new(NetworkConfiguration::new()).unwrap())
-}
-
 fn ethcore_client(client: &Arc<TestBlockChainClient>, miner: &Arc<TestMinerService>) -> EthcoreClient<TestBlockChainClient, TestMinerService> {
-	EthcoreClient::new(client, miner, logger(), settings())
-}
-
-fn ethcore_set_client(miner: &Arc<TestMinerService>, net: &Arc<NetworkService<SyncMessage>>) -> EthcoreSetClient<TestMinerService> {
-	EthcoreSetClient::new(miner, net)
+	EthcoreClient::new(client, miner, logger(), settings(), None)
 }

 #[test]
 fn rpc_ethcore_extra_data() {
 	let miner = miner_service();
 	let client = client_service();
-	let network = network_service();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());

 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_extraData", "params": [], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":"0x01020304","id":1}"#;
@ -86,10 +71,8 @@ fn rpc_ethcore_default_extra_data() {

 	let miner = miner_service();
 	let client = client_service();
-	let network = network_service();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());

 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_defaultExtraData", "params": [], "id": 1}"#;
 	let response = format!(r#"{{"jsonrpc":"2.0","result":"0x{}","id":1}}"#, misc::version_data().to_hex());
@ -101,10 +84,8 @@ fn rpc_ethcore_default_extra_data() {
 fn rpc_ethcore_gas_floor_target() {
 	let miner = miner_service();
 	let client = client_service();
-	let network = network_service();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());

 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_gasFloorTarget", "params": [], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":"0x3039","id":1}"#;
@ -116,10 +97,8 @@ fn rpc_ethcore_gas_floor_target() {
 fn rpc_ethcore_min_gas_price() {
 	let miner = miner_service();
 	let client = client_service();
-	let network = network_service();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());

 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_minGasPrice", "params": [], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":"0x01312d00","id":1}"#;
@ -127,82 +106,16 @@ fn rpc_ethcore_min_gas_price() {
 	assert_eq!(io.handle_request(request), Some(response.to_owned()));
 }

-#[test]
-fn rpc_ethcore_set_min_gas_price() {
-	let miner = miner_service();
-	let client = client_service();
-	let network = network_service();
-	let io = IoHandler::new();
-	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());
-
-	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setMinGasPrice", "params":["0xcd1722f3947def4cf144679da39c4c32bdc35681"], "id": 1}"#;
-	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
-
-	assert_eq!(io.handle_request(request), Some(response.to_owned()));
-	assert_eq!(miner.minimal_gas_price(), U256::from_str("cd1722f3947def4cf144679da39c4c32bdc35681").unwrap());
-}
-
-#[test]
-fn rpc_ethcore_set_gas_floor_target() {
-	let miner = miner_service();
-	let client = client_service();
-	let network = network_service();
-	let io = IoHandler::new();
-	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());
-
-	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setGasFloorTarget", "params":["0xcd1722f3947def4cf144679da39c4c32bdc35681"], "id": 1}"#;
-	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
-
-	assert_eq!(io.handle_request(request), Some(response.to_owned()));
-	assert_eq!(miner.gas_floor_target(), U256::from_str("cd1722f3947def4cf144679da39c4c32bdc35681").unwrap());
-}
-
-#[test]
-fn rpc_ethcore_set_extra_data() {
-	let miner = miner_service();
-	let client = client_service();
-	let network = network_service();
-	let io = IoHandler::new();
-	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());
-
-	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setExtraData", "params":["0xcd1722f3947def4cf144679da39c4c32bdc35681"], "id": 1}"#;
-	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
-
-	assert_eq!(io.handle_request(request), Some(response.to_owned()));
-	assert_eq!(miner.extra_data(), "cd1722f3947def4cf144679da39c4c32bdc35681".from_hex().unwrap());
-}
-
-#[test]
-fn rpc_ethcore_set_author() {
-	let miner = miner_service();
-	let client = client_service();
-	let network = network_service();
-	let io = IoHandler::new();
-	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());
-
-	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setAuthor", "params":["0xcd1722f3947def4cf144679da39c4c32bdc35681"], "id": 1}"#;
-	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
-
-	assert_eq!(io.handle_request(request), Some(response.to_owned()));
-	assert_eq!(miner.author(), Address::from_str("cd1722f3947def4cf144679da39c4c32bdc35681").unwrap());
-}
-
 #[test]
 fn rpc_ethcore_dev_logs() {
 	let miner = miner_service();
 	let client = client_service();
-	let network = network_service();
 	let logger = logger();
 	logger.append("a".to_owned());
 	logger.append("b".to_owned());
-	let ethcore = EthcoreClient::new(&client, &miner, logger.clone(), settings()).to_delegate();
+	let ethcore = EthcoreClient::new(&client, &miner, logger.clone(), settings(), None).to_delegate();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore);
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());

 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_devLogs", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":["b","a"],"id":1}"#;
@ -214,40 +127,21 @@ fn rpc_ethcore_dev_logs() {
 fn rpc_ethcore_dev_logs_levels() {
 	let miner = miner_service();
 	let client = client_service();
-	let network = network_service();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());

 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_devLogsLevels", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":"rpc=trace","id":1}"#;
-	assert_eq!(io.handle_request(request), Some(response.to_owned()));
-}
-
-#[test]
-fn rpc_ethcore_set_transactions_limit() {
-	let miner = miner_service();
-	let client = client_service();
-	let network = network_service();
-	let io = IoHandler::new();
-	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());
-
-	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setTransactionsLimit", "params":[10240240], "id": 1}"#;
-	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;

 	assert_eq!(io.handle_request(request), Some(response.to_owned()));
-	assert_eq!(miner.transactions_limit(), 10_240_240);
 }

 #[test]
 fn rpc_ethcore_transactions_limit() {
 	let miner = miner_service();
 	let client = client_service();
-	let network = network_service();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());

 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_transactionsLimit", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":1024,"id":1}"#;
@ -259,10 +153,8 @@ fn rpc_ethcore_transactions_limit() {
 fn rpc_ethcore_net_chain() {
 	let miner = miner_service();
 	let client = client_service();
-	let network = network_service();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());

 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_netChain", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":"testchain","id":1}"#;
@ -274,10 +166,8 @@ fn rpc_ethcore_net_chain() {
 fn rpc_ethcore_net_max_peers() {
 	let miner = miner_service();
 	let client = client_service();
-	let network = network_service();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());

 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_netMaxPeers", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":25,"id":1}"#;
@ -289,10 +179,8 @@ fn rpc_ethcore_net_max_peers() {
 fn rpc_ethcore_net_port() {
 	let miner = miner_service();
 	let client = client_service();
-	let network = network_service();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());

 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_netPort", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":30303,"id":1}"#;
@ -304,10 +192,8 @@ fn rpc_ethcore_net_port() {
 fn rpc_ethcore_rpc_settings() {
 	let miner = miner_service();
 	let client = client_service();
-	let network = network_service();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());

 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_rpcSettings", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":{"enabled":true,"interface":"all","port":8545},"id":1}"#;
@ -319,13 +205,39 @@ fn rpc_ethcore_rpc_settings() {
 fn rpc_ethcore_node_name() {
 	let miner = miner_service();
 	let client = client_service();
-	let network = network_service();
 	let io = IoHandler::new();
 	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
-	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());

 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_nodeName", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":"mynode","id":1}"#;

 	assert_eq!(io.handle_request(request), Some(response.to_owned()));
 }
+
+#[test]
+fn rpc_ethcore_unsigned_transactions_count() {
+	let miner = miner_service();
+	let client = client_service();
+	let io = IoHandler::new();
+	let queue = Arc::new(ConfirmationsQueue::default());
+	let ethcore = EthcoreClient::new(&client, &miner, logger(), settings(), Some(queue)).to_delegate();
+	io.add_delegate(ethcore);
+
+	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_unsignedTransactionsCount", "params":[], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":0,"id":1}"#;
+
+	assert_eq!(io.handle_request(request), Some(response.to_owned()));
+}
+
+#[test]
+fn rpc_ethcore_unsigned_transactions_count_when_signer_disabled() {
+	let miner = miner_service();
+	let client = client_service();
+	let io = IoHandler::new();
+	io.add_delegate(ethcore_client(&client, &miner).to_delegate());
+
+	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_unsignedTransactionsCount", "params":[], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","error":{"code":-32030,"message":"Trusted Signer is disabled. This API is not available.","data":null},"id":1}"#;
+
+	assert_eq!(io.handle_request(request), Some(response.to_owned()));
+}
--- a/rpc/src/v1/tests/mocked/ethcore_set.rs
+++ b/rpc/src/v1/tests/mocked/ethcore_set.rs
@ -0,0 +1,107 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+use std::sync::Arc;
+use std::str::FromStr;
+use jsonrpc_core::IoHandler;
+use v1::{EthcoreSet, EthcoreSetClient};
+use ethcore::miner::MinerService;
+use ethcore::service::SyncMessage;
+use v1::tests::helpers::TestMinerService;
+use util::numbers::*;
+use util::network::{NetworkConfiguration, NetworkService};
+use rustc_serialize::hex::FromHex;
+
+fn miner_service() -> Arc<TestMinerService> {
+	Arc::new(TestMinerService::default())
+}
+
+fn network_service() -> Arc<NetworkService<SyncMessage>> {
+	Arc::new(NetworkService::new(NetworkConfiguration::new()).unwrap())
+}
+
+fn ethcore_set_client(miner: &Arc<TestMinerService>, net: &Arc<NetworkService<SyncMessage>>) -> EthcoreSetClient<TestMinerService> {
+	EthcoreSetClient::new(miner, net)
+}
+
+#[test]
+fn rpc_ethcore_set_min_gas_price() {
+	let miner = miner_service();
+	let network = network_service();
+	let io = IoHandler::new();
+	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());
+
+	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setMinGasPrice", "params":["0xcd1722f3947def4cf144679da39c4c32bdc35681"], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
+
+	assert_eq!(io.handle_request(request), Some(response.to_owned()));
+	assert_eq!(miner.minimal_gas_price(), U256::from_str("cd1722f3947def4cf144679da39c4c32bdc35681").unwrap());
+}
+#[test]
+fn rpc_ethcore_set_gas_floor_target() {
+	let miner = miner_service();
+	let network = network_service();
+	let io = IoHandler::new();
+	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());
+
+	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setGasFloorTarget", "params":["0xcd1722f3947def4cf144679da39c4c32bdc35681"], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
+
+	assert_eq!(io.handle_request(request), Some(response.to_owned()));
+	assert_eq!(miner.gas_floor_target(), U256::from_str("cd1722f3947def4cf144679da39c4c32bdc35681").unwrap());
+}
+
+#[test]
+fn rpc_ethcore_set_extra_data() {
+	let miner = miner_service();
+	let network = network_service();
+	let io = IoHandler::new();
+	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());
+
+	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setExtraData", "params":["0xcd1722f3947def4cf144679da39c4c32bdc35681"], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
+
+	assert_eq!(io.handle_request(request), Some(response.to_owned()));
+	assert_eq!(miner.extra_data(), "cd1722f3947def4cf144679da39c4c32bdc35681".from_hex().unwrap());
+}
+
+#[test]
+fn rpc_ethcore_set_author() {
+	let miner = miner_service();
+	let network = network_service();
+	let io = IoHandler::new();
+	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());
+
+	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setAuthor", "params":["0xcd1722f3947def4cf144679da39c4c32bdc35681"], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
+
+	assert_eq!(io.handle_request(request), Some(response.to_owned()));
+	assert_eq!(miner.author(), Address::from_str("cd1722f3947def4cf144679da39c4c32bdc35681").unwrap());
+}
+
+#[test]
+fn rpc_ethcore_set_transactions_limit() {
+	let miner = miner_service();
+	let network = network_service();
+	let io = IoHandler::new();
+	io.add_delegate(ethcore_set_client(&miner, &network).to_delegate());
+
+	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_setTransactionsLimit", "params":[10240240], "id": 1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":true,"id":1}"#;
+
+	assert_eq!(io.handle_request(request), Some(response.to_owned()));
+	assert_eq!(miner.transactions_limit(), 10_240_240);
+}
--- a/rpc/src/v1/tests/mocked/mod.rs
+++ b/rpc/src/v1/tests/mocked/mod.rs
@ -24,4 +24,5 @@ mod web3;
 mod personal;
 mod personal_signer;
 mod ethcore;
+mod ethcore_set;
 mod rpc;
--- a/rpc/src/v1/traits/ethcore.rs
+++ b/rpc/src/v1/traits/ethcore.rs
@ -60,6 +60,10 @@ pub trait Ethcore: Sized + Send + Sync + 'static {
 	/// Returns distribution of gas price in latest blocks.
 	fn gas_price_statistics(&self, _: Params) -> Result<Value, Error>;

+	/// Returns number of unsigned transactions waiting in the signer queue (if signer enabled)
+	/// Returns error when signer is disabled
+	fn unsigned_transactions_count(&self, _: Params) -> Result<Value, Error>;
+
 	/// Should be used to convert object to io delegate.
 	fn to_delegate(self) -> IoDelegate<Self> {
 		let mut delegate = IoDelegate::new(Arc::new(self));
@ -77,6 +81,7 @@ pub trait Ethcore: Sized + Send + Sync + 'static {
 		delegate.add_method("ethcore_nodeName", Ethcore::node_name);
 		delegate.add_method("ethcore_defaultExtraData", Ethcore::default_extra_data);
 		delegate.add_method("ethcore_gasPriceStatistics", Ethcore::gas_price_statistics);
+		delegate.add_method("ethcore_unsignedTransactionsCount", Ethcore::unsigned_transactions_count);

 		delegate
 	}
--- a/sync/src/blocks.rs
+++ b/sync/src/blocks.rs
@ -295,6 +295,10 @@ impl BlockCollection {
 		let old_subchains: HashSet<_> = { self.heads.iter().cloned().collect() };
 		for s in self.heads.drain(..) {
 			let mut h = s.clone();
+			if !self.blocks.contains_key(&h) {
+				new_heads.push(h);
+				continue;
+			}
 			loop {
 				match self.parents.get(&h) {
 					Some(next) => {
@ -394,7 +398,7 @@ mod test {
 		assert_eq!(&bc.drain()[..], &blocks[6..16]);
 		assert_eq!(hashes[15], bc.heads[0]);

-		bc.insert_headers(headers[16..].to_vec());
+		bc.insert_headers(headers[15..].to_vec());
 		bc.drain();
 		assert!(bc.is_empty());
 	}
@ -420,5 +424,24 @@ mod test {
 		assert!(bc.head.is_some());
 		assert_eq!(hashes[21], bc.heads[0]);
 	}
+
+	#[test]
+	fn insert_headers_no_gap() {
+		let mut bc = BlockCollection::new();
+		assert!(is_empty(&bc));
+		let client = TestBlockChainClient::new();
+		let nblocks = 200;
+		client.add_blocks(nblocks, EachBlockWith::Nothing);
+		let blocks: Vec<_> = (0 .. nblocks).map(|i| (&client as &BlockChainClient).block(BlockID::Number(i as BlockNumber)).unwrap()).collect();
+		let headers: Vec<_> = blocks.iter().map(|b| Rlp::new(b).at(0).as_raw().to_vec()).collect();
+		let hashes: Vec<_> = headers.iter().map(|h| HeaderView::new(h).sha3()).collect();
+		let heads: Vec<_> = hashes.iter().enumerate().filter_map(|(i, h)| if i % 20 == 0 { Some(h.clone()) } else { None }).collect();
+		bc.reset_to(heads);
+
+		bc.insert_headers(headers[1..2].to_vec());
+		assert!(bc.drain().is_empty());
+		bc.insert_headers(headers[0..1].to_vec());
+		assert_eq!(bc.drain().len(), 2);
+	}
 }

--- a/sync/src/chain.rs
+++ b/sync/src/chain.rs
@ -100,6 +100,7 @@ use io::SyncIo;
 use time;
 use super::SyncConfig;
 use blocks::BlockCollection;
+use rand::{thread_rng, Rng};

 known_heap_size!(0, PeerInfo);

@ -308,7 +309,6 @@ impl ChainSync {
 		}
 		self.syncing_difficulty = From::from(0u64);
 		self.state = SyncState::Idle;
-		self.blocks.clear();
 		self.active_peers = self.peers.keys().cloned().collect();
 	}

@ -393,7 +393,7 @@ impl ChainSync {
 		self.clear_peer_download(peer_id);
 		let expected_hash = self.peers.get(&peer_id).and_then(|p| p.asking_hash);
 		let expected_asking = if self.state == SyncState::ChainHead { PeerAsking::Heads } else { PeerAsking::BlockHeaders };
-		if !self.reset_peer_asking(peer_id, expected_asking) {
+		if !self.reset_peer_asking(peer_id, expected_asking) || expected_hash.is_none() {
 			trace!(target: "sync", "Ignored unexpected headers");
 			self.continue_sync(io);
 			return Ok(());
@ -533,10 +533,6 @@ impl ChainSync {
 		let header_rlp = try!(block_rlp.at(0));
 		let h = header_rlp.as_raw().sha3();
 		trace!(target: "sync", "{} -> NewBlock ({})", peer_id, h);
-		if self.state != SyncState::Idle {
-			trace!(target: "sync", "NewBlock ignored while seeking");
-			return Ok(());
-		}
 		let header: BlockHeader = try!(header_rlp.as_val());
 		let mut unknown = false;
 		{
@ -544,46 +540,45 @@ impl ChainSync {
 			peer.latest_hash = header.hash();
 			peer.latest_number = Some(header.number());
 		}
-		if header.number <= self.last_imported_block + 1 {
-			match io.chain().import_block(block_rlp.as_raw().to_vec()) {
-				Err(Error::Import(ImportError::AlreadyInChain)) => {
-					trace!(target: "sync", "New block already in chain {:?}", h);
-				},
-				Err(Error::Import(ImportError::AlreadyQueued)) => {
-					trace!(target: "sync", "New block already queued {:?}", h);
-				},
-				Ok(_) => {
-					if header.number == self.last_imported_block + 1 {
-						self.last_imported_block = header.number;
-						self.last_imported_hash = header.hash();
-					}
-					trace!(target: "sync", "New block queued {:?} ({})", h, header.number);
-				},
-				Err(Error::Block(BlockError::UnknownParent(p))) => {
-					unknown = true;
-					trace!(target: "sync", "New block with unknown parent ({:?}) {:?}", p, h);
-				},
-				Err(e) => {
-					debug!(target: "sync", "Bad new block {:?} : {:?}", h, e);
-					io.disable_peer(peer_id);
-				}
-			};
-		}
-		else {
-			unknown = true;
-		}
-		if unknown {
-			trace!(target: "sync", "New unknown block {:?}", h);
-			//TODO: handle too many unknown blocks
-			let difficulty: U256 = try!(r.val_at(1));
-			if let Some(ref mut peer) = self.peers.get_mut(&peer_id) {
-				if peer.difficulty.map_or(true, |pd| difficulty > pd) {
-					//self.state = SyncState::ChainHead;
-					peer.difficulty = Some(difficulty);
-					trace!(target: "sync", "Received block {:?}  with no known parent. Peer needs syncing...", h);
+		match io.chain().import_block(block_rlp.as_raw().to_vec()) {
+			Err(Error::Import(ImportError::AlreadyInChain)) => {
+				trace!(target: "sync", "New block already in chain {:?}", h);
+			},
+			Err(Error::Import(ImportError::AlreadyQueued)) => {
+				trace!(target: "sync", "New block already queued {:?}", h);
+			},
+			Ok(_) => {
+				if header.number == self.last_imported_block + 1 {
+					self.last_imported_block = header.number;
+					self.last_imported_hash = header.hash();
 				}
+				trace!(target: "sync", "New block queued {:?} ({})", h, header.number);
+			},
+			Err(Error::Block(BlockError::UnknownParent(p))) => {
+				unknown = true;
+				trace!(target: "sync", "New block with unknown parent ({:?}) {:?}", p, h);
+			},
+			Err(e) => {
+				debug!(target: "sync", "Bad new block {:?} : {:?}", h, e);
+				io.disable_peer(peer_id);
+			}
+		};
+		if unknown {
+			if self.state != SyncState::Idle {
+				trace!(target: "sync", "NewBlock ignored while seeking");
+			} else {
+				trace!(target: "sync", "New unknown block {:?}", h);
+				//TODO: handle too many unknown blocks
+				let difficulty: U256 = try!(r.val_at(1));
+				if let Some(ref mut peer) = self.peers.get_mut(&peer_id) {
+					if peer.difficulty.map_or(true, |pd| difficulty > pd) {
+						//self.state = SyncState::ChainHead;
+						peer.difficulty = Some(difficulty);
+						trace!(target: "sync", "Received block {:?}  with no known parent. Peer needs syncing...", h);
+					}
+				}
+				self.sync_peer(io, peer_id, true);
 			}
-			self.sync_peer(io, peer_id, true);
 		}
 		Ok(())
 	}
@ -661,7 +656,7 @@ impl ChainSync {
 	/// Resume downloading
 	fn continue_sync(&mut self, io: &mut SyncIo) {
 		let mut peers: Vec<(PeerId, U256)> = self.peers.iter().map(|(k, p)| (*k, p.difficulty.unwrap_or_else(U256::zero))).collect();
-		peers.sort_by(|&(_, d1), &(_, d2)| d1.cmp(&d2).reverse()); //TODO: sort by rating
+		thread_rng().shuffle(&mut peers); //TODO: sort by rating
 		trace!(target: "sync", "Syncing with {}/{} peers", self.active_peers.len(), peers.len());
 		for (p, _) in peers {
 			if self.active_peers.contains(&p) {
@ -687,7 +682,11 @@ impl ChainSync {
 	}

 	/// Find something to do for a peer. Called for a new peer or when a peer is done with it's task.
-	fn sync_peer(&mut self, io: &mut SyncIo,  peer_id: PeerId, force: bool) {
+	fn sync_peer(&mut self, io: &mut SyncIo, peer_id: PeerId, force: bool) {
+		if !self.active_peers.contains(&peer_id) {
+			trace!(target: "sync", "Skipping deactivated peer");
+			return;
+		}
 		let (peer_latest, peer_difficulty) = {
 			let peer = self.peers.get_mut(&peer_id).unwrap();
 			if peer.asking != PeerAsking::Nothing {
--- a/sync/src/lib.rs
+++ b/sync/src/lib.rs
@ -44,8 +44,8 @@
 //! 	let mut service = NetworkService::new(NetworkConfiguration::new()).unwrap();
 //! 	service.start().unwrap();
 //! 	let dir = env::temp_dir();
-//! 	let client = Client::new(ClientConfig::default(), ethereum::new_frontier(), &dir, Arc::new(Miner::default()), service.io().channel()).unwrap();
-//! 	let miner = Miner::new(false, ethereum::new_frontier());
+//! 	let client = Client::new(ClientConfig::default(), ethereum::new_frontier(true), &dir, Arc::new(Miner::default()), service.io().channel()).unwrap();
+//! 	let miner = Miner::new(false, ethereum::new_frontier(true));
 //! 	let sync = EthSync::new(SyncConfig::default(), client);
 //! 	EthSync::register(&mut service, sync);
 //! }
--- a/util/bigint/src/uint.rs
+++ b/util/bigint/src/uint.rs
@ -425,12 +425,16 @@ macro_rules! uint_overflowing_mul_reg {
 				let (c_u, overflow_u) = mul_u32(a, b_u, c_l >> 32);
 				ret[i + j] = (c_l & 0xFFFFFFFF) + (c_u << 32);

-				// Only single overflow possible here
-				let carry = (c_u >> 32) + (overflow_u << 32) + overflow_l + carry2;
-				let (carry, o) = carry.overflowing_add(ret[i + j + 1]);
+				// No overflow here
+				let res = (c_u >> 32) + (overflow_u << 32);
+				// possible overflows
+				let (res, o1) = res.overflowing_add(overflow_l);
+				let (res, o2) = res.overflowing_add(carry2);
+				let (res, o3) = res.overflowing_add(ret[i + j + 1]);
+				ret[i + j + 1] = res;

-				ret[i + j + 1] = carry;
-				carry2 = o as u64;
+				// Only single overflow possible there
+				carry2 = (o1 | o2 | o3) as u64;
 			}
 		}

@ -1305,12 +1309,16 @@ impl U256 {
 				let (c_u, overflow_u) = mul_u32(a, b_u, c_l >> 32);
 				ret[i + j] = (c_l & 0xFFFFFFFF) + (c_u << 32);

-				// Only single overflow possible here
-				let carry = (c_u >> 32) + (overflow_u << 32) + overflow_l + carry2;
-				let (carry, o) = carry.overflowing_add(ret[i + j + 1]);
+				// No overflow here
+				let res = (c_u >> 32) + (overflow_u << 32);
+				// possible overflows
+				let (res, o1) = res.overflowing_add(overflow_l);
+				let (res, o2) = res.overflowing_add(carry2);
+				let (res, o3) = res.overflowing_add(ret[i + j + 1]);
+				ret[i + j + 1] = res;

-				ret[i + j + 1] = carry;
-				carry2 = o as u64;
+				// Only single overflow possible there
+				carry2 = (o1 | o2 | o3) as u64;
 			}
 		}

--- a/util/src/kvdb.rs
+++ b/util/src/kvdb.rs
@ -109,6 +109,7 @@ impl Database {
 	/// Open database file. Creates if it does not exist.
 	pub fn open(config: &DatabaseConfig, path: &str) -> Result<Database, String> {
 		let mut opts = Options::new();
+		try!(opts.set_parsed_options("rate_limiter_bytes_per_sec=256000000"));
 		opts.set_max_open_files(config.max_open_files);
 		opts.create_if_missing(true);
 		opts.set_use_fsync(false);
--- a/util/src/network/host.rs
+++ b/util/src/network/host.rs
@ -191,7 +191,7 @@ pub struct NetworkContext<'s, Message> where Message: Send + Sync + Clone + 'sta
 	sessions: Arc<RwLock<Slab<SharedSession>>>,
 	session: Option<SharedSession>,
 	session_id: Option<StreamToken>,
-	reserved_peers: &'s HashSet<NodeId>,
+	_reserved_peers: &'s HashSet<NodeId>,
 }

 impl<'s, Message> NetworkContext<'s, Message> where Message: Send + Sync + Clone + 'static, {
@ -207,7 +207,7 @@ impl<'s, Message> NetworkContext<'s, Message> where Message: Send + Sync + Clone
 			session_id: id,
 			session: session,
 			sessions: sessions,
-			reserved_peers: reserved_peers,
+			_reserved_peers: reserved_peers,
 		}
 	}

@ -837,9 +837,9 @@ impl<Message> Host<Message> where Message: Send + Sync + Clone {
 				let mut s = session.lock().unwrap();
 				if !s.expired() {
 					if s.is_ready() {
+						self.num_sessions.fetch_sub(1, AtomicOrdering::SeqCst);
 						for (p, _) in self.handlers.read().unwrap().iter() {
 							if s.have_capability(p)  {
-								self.num_sessions.fetch_sub(1, AtomicOrdering::SeqCst);
 								to_disconnect.push(p);
 							}
 						}