* move common forks and parameters to common params

* port specs over to new format

* fix RPC tests

* parity-machine skeleton

* remove block type

* extract out ethereum-specific methods into EthereumMachine

* beginning to integrate Machine into engines. dealing with stale transitions in Ethash

* initial porting to machine

* move block reward back into engine

* abstract block reward logic

* move last hash and DAO HF logic into machine

* begin making engine function parameters generic

* abstract epoch verifier and ethash block reward logic

* instantiate special ethereummachine for ethash in spec

* optional full verification in verify_block_family

* re-instate tx_filter in a way that works for all engines

* fix warnings

* fix most tests, further generalize engine trait

* uncomment nullengine, get ethcore tests compiling

* fix warnings

* update a bunch of specs

* re-enable engine signer, validator set, and transition handler

* migrate basic_authority engine

* move last hashes into executedblock

* port tendermint

* make all ethcore tests pass

* json-tests compilation

* fix RPC tests: change in gas limit for new block changed PoW hash

* fix minor grumbles

* validate chainspecs

* fix broken import

* fix transaction verification for pre-homestead

* Add RPC eth_chainId for querying the current blockchain chain ID

Currently although we can use `net_version` RPC call to get the
current network ID, there's no RPC for querying the chain ID. This
makes it impossible to determine the current actual blockchain using
the RPC. An ETH/ETC client can accidentally connect to an ETC/ETH RPC
endpoint without knowing it unless it tries to sign a transaction or
it fetch a transaction that is known to have signed with a chain
ID. This has since caused trouble for application developers, such as
MetaMask, to add multi-chain support.

The same RPC endpoint is also about to be merged for ETC's
go-ethereum: https://github.com/ethereumproject/go-ethereum/pull/336

* Add eth_chainId to js's web3 interface

* Add a mocked test for eth_chainId

* Add chainId in js's jsonrpc interfaces

* Change return type for eth_chainId to `Option<u64>`

* Change name eth_chainId to parity_chainId

* Wrong test name and missed var for rpc_parity_chain_id test

* Use U256 to return chainId and fix for master

u64 returns decimal integer, and there seems to be no type called
U64. So here I use U256 to return the hex integer.

* Fix chainID test

Before EIP155 fork number, chainID should be null.

* Change both parity_chainId and transaction::chainId to use U64

This makes it consistent that all chain ids returned are hex string.

* Fix wrong U64 serialization

[Public Node] Disable tx scheduling and hardware wallets

* Rebase and fix compilation errors (tests not yet fixed)

* Use `debug_assert` over `assert`

* Fix tests

* Assert safety, clean up

* Fix up stale cache removal, move one assert to debug_assert

* Remove printlns

* Add licenses

* Fix benches

* Inline some no-ops in a hot loop that weren't being inlined

* Add spooky comment to make sure no-one removes the inlining annotations

* Minor cleanup

* Add option to switch between mmap and ram

* Flag ethash to use less memory when running light client

* Fix tests

* Remove todo comment (it's done)

* Replace assertion with error return

* Fix indentation

* Use union instead of `transmute`

* Fix benches

* Extract to constants

* Clean up and fix soundness holes

* Fix formatting

* Ignore missing-file errors

* Make incorrect cache size an error condition instead of a panic, remove dead code

* Fix compilation errors from rebase

* Fix compilation errors in tests

* Fix compilation errors in tests

Rename Requests to Batch

Use host as ws/dapps url if present.

* 1 confirmation when tx is mined

* Spelling mistake

* Fix #6540
- just skip the checkRequest call if result of postTransaction is a tx ID

* Fix requestId naming

* Prepare changelog for 1.7.1

* Update changelog for 1.7.1

* Prepare changelog for 1.7.2

* Update CHANGELOG

* Update changelog for 1.7.2

* Snapshot sync kicks in after 10k blocks

* Add ropsten fork to changelog

* Add Gnosis multi-sig support to Changelog

* Update final changelog for 1.7.2

* EIP-211 updates

* benchmarks

* blockhash instruction gas cost updated

* More benches

* EIP-684

* EIP-649

* EIP-658

* Updated some tests

* Modexp fixes

* STATICCALL fixes

* Pairing fixes

* More STATICALL fixes

* Use paritytech/bn

* Fixed REVERTing of contract creation

* Fixed more tests

* Fixed more tests

* Blockchain tests

* Enable previously broken tests

* Transition test

* Updated tests

* Fixed modexp reading huge numbers

* Enabled max_code_size test

* Review fixes

* Updated pairing pricing

* missing commas (style)

* Update test.rs

* Small improvements

* eip161abc

* Fix extension detection.

* Fix mobx quirks.

* Update submodule.

separate trie from util and make its dependencies into libs

* bytes
* hashdb
* memorydb
* nibbleslice
* nibblevec

* sha3 test for empty input implemented

* rename sha3-> keccak

* update keccak test. Now it expects input to hash

* fix gas_left in tests

* Fixing/removing failing JS tests.

* Fix javascript tests.

* generate random channel encryption key on restart

* session-level nonces

* fixed warning after rebase

* session_nonce -> nonce

* Copy modal from keepkey branch and generalize

The keepkey PinMatrix modal needs to be the same for Trezor, but we
should probably try to keep it general since it can be used for both.

* Add trezor communication code

This is a result of much trial-and-error and a couple of dead-ends in
how to communicate and wire everything up.

Code here is still a bit WIP with lots of debug prints and stuff.

The test works though, it is possible to sign a transaction.

* Extend the basic lib to allow Trezor

This is kind of ugly and needs some cleanup and generalization. I’ve
just copy-pasted some things to bring in the trezor wallets. I’ve also
had to add a lock to the USB API so that only one thing talks to the
USB at once.

* Add RPC plumbing needed

We need to be able to get “locked” devices from the frontend to figure
out if we’re going to display the PinMatrix or not. Then we need to be
able to send a pin to a device.

* Add logic to query backend for Trezor and display PinMatrix

There’s a bug somewhere here because signing a transaction fails if you
take too long to press the confirm button on the device.

* Change back to paritytech branch

As my fork has been merged in.

* Converting spaces to tabs, as it should be

* Incorporate correct handling of EIP-155

Turns out the Trezor was adjusting the v part of the signature, and
we’re already doing that so it was done twice.

* Some circular logic here that was incorrect

BE-encoded U256 is almost the same as RLP encoded without the
size-byte, except for <u8 sized values. What’s really done is
BE-encoded U256 and then left-trimmed to the smallest size. Kind of
obvious in hindsight.

* Resolve issue where not clicking fast enough fails

The device will not repeat a ButtonRequest when you read from it, so
you need to have a blocking `read` for whatever amount of time that you
want to give the user to click. You could also have a shorter timeout
but keep retrying for some amount of time, but it would amount to the
same thing.

* Scan after pin entry to make accepting it faster

* Remove ability to cancel pin request

* Some slight cleanup

* Probe for the correct HID Version to determine padding

* Move the PinMatrix from Accounts to Application

* Removing unused dependencies

* Mistake in copying over stuff from keepkey branch

* Simplify FormattedMessage

* Move generated code to external crate

* Remove ethcore-util dependency

* Fix broken import in test

This test is useless without a connected Trezor, not sure how to make
it useful without one.

* Merge branch 'master' into fh-4500-trezor-support

# Conflicts:
#	rpc/src/v1/helpers/dispatch.rs

* Ignore test that can't be run without trezor device

* Fixing grumbles

* Avoiding owning data in RPC method
* Checking for overflow in v part of signature
* s/network_id/chain_id
* Propagating an error from the HID Api
* Condensing code a little bit

* Fixing UI.

* Debugging trezor.

* Minor styling tweak

* Make message type into an actual type

This makes the message type that the RPC message accepts into an actual
type as opposed to just a string, based on feedback. Although I’m not
100% sure this has actually improved the situation.

Overall I think the hardware wallet interface needs some refactoring
love.

* Split the trezor RPC endpoint

It’s split into two more generic endpoints that should be suitable for
any hardware wallets with the same behavior to sit behind.

* Reflect RPC method split in javascript

* Fix bug with pin entry

* Fix deadlock for Ledger

* Avoid having a USB lock in just listing locked wallets

* Fix javascript issue (see #6509)

* Replace Mutex with RwLock

* Update Ledger test

* Fix typo causing faulty signatures (sometimes)

* *Actually* fix tests

* Update git submodule

Needed to make tests pass

* Swap line orders to prevent possible deadlock

* Make setPinMatrixRequest an @action