* bigint upgraded to version 3.0

* fixed missing FromHex import in ethcore tests

* fixed missing FromHex import in rpc tests

This is a huge change, which includes some changes to replace code that
originally cloned to reuse allocations instead. The updated
`elastic-array` crate renames its consuming `Vec`-conversion method to
`into_vec`, which means that I can do a simple
`sed -i 's/to_vec/into_vec/'` and then fix the compilation errors.

This commit is probably a minor performance win and definitely a
significant readability win.

asynchronous rob authored Jun 28, 2017 and Arkadiy Paronyan committed Jun 28, 2017

* final engine changes

* migration to v13

* adding and removing pending transitions

* epoch_transition_for

* port snapshot to new engine methods

* final validator set interface

* fix compiler errors

* revert v13/epoch_depth transition

* make call on new epoch

* rolling finality checker

* tests for finality checker

* constructing finality proof upon pending transition

* fix warnings and finality proof checking

* fix compiler warnings in tests

* test fixes

* don't include genesis in finality checking

* change snapshot test chain building logic

* minor refactorings

* fetch epoch transition based on parent, fix divide-by-zero in SimpleList

* fix formatting

* fix ABIs and finality checking in snapshot restoration

* encode signal number in proof

* create more blocks at the end of tests

* update gist to accurate contract code

* test for epoch_transition_for

* fix tests with immediateTransitions parameter

* disable force flag after forcing

* rename ValidatorsChanged to InitiateChange and finalizeSignal to finalizeChange

* a few more validator set tests

* implement From<&'static str> for Secret

* Dev account.

* Fix Secret semantics.

* separate modules for consensus snapshot chunks

* bulk of authority warp logic

* finish authority warp implementation

* squash warnings and enable authority snapshot mode

* test harness for PoA

* fiddle with harness

* epoch generation proof fixes

* update constructor code

* store epoch transition proof after block commit

* basic snap and restore test

* use keyvaluedb in state restoration

* decompress chunks

* fix encoding issues

* fixed-to-contract-to-contract test

* implement ancient block import

* restore genesis transition in PoW snapshot

* add format version method to snapshot components

* supported version numbers in snapshot_components

* allow returning of ancient epoch transitions

* genesis hash mismatch check

* remove commented code

* Create new column family for local node info

* remove DBTransaction::new reliance on DB

* KeyValueDB trait

* InMemory KeyValueDB implementation

* journaldb generic over KVDB

* make most of `ethcore` generic over KVDB

* fix json tests compilation

* get all tests compiling

* implement local store (just for transactions)

* finish local store API, test

* put everything into place

* better test for skipping bad transactions

* fix warning

* update local store every 15 minutes

* remove superfluous `{}`s

* Porting json

* Dapps

* Rpc & Ethstore

* New ethabi

* Last bunch of fixes

* Fixing last test

* Removing build script

* Adding ethcore-ipc-tests back

* Fixing grumbles

* Fixing blockchain tests (inference regression?)

* Transaction timestamp condtiion

* Updated docs

* Updated docs

* Check agains last block timestamp

* EIP98: Optional receipt state root

* Use if-else

* Fixing tests

* Fix whitespace.

* Update copyright years/owner.

* Push release only for tags.

* chain scoring

* use current steps

* Implementing secret

* Fixing tests

* Moving logs to separate, testable function

* Adding test

* Fixing log index

* Adding transaction log index

* Fixing rpc tests

* Making interface of  a bit cleaner.

* owning views of blockchain data

* port blockchain and client traits to owning views

* fix ethcore tests

* use strong headers and bodies in ethcore_light

* port ethsync to use owning views

* port rpc to owning views

* port parity informant and blockchain export

- Move Updater into its own crate.
- Change ethcore -> parity in authors, homepages and licenses.

* The front-end for each hard-fork, also EIP-160.

* Address EIP161 a/c

* Include EIP-161b

* EIP-161 part d.

* Fix test build.

* Fix one test, add another.

* Fix use of bloom & renaming.

* Initial groundwork for EIP-155

* Fix minor bug.

* Fix all tests finally.

* Rest of EIP-155.

* Add tests for EIP-155 algorithm.

Update transaction tests validation.

* Minor reformat.

* Address grumbles.

* Remove unused code.

* Fix SUICIDE gas mechanism and add consensus tests.

* Remove commented code.

* Set Frontier hardfork block number

* Fix warning.

* Transaction tests,

* clarify "cancelled periodic snapshot" message

* more rigorous checks for snapshot validity

* verify ancient blocks on import

* limit number of fed blocks

* make it possible to feed snapshot service canonical hashes

* fix failing test build

* swap ethash DAG only when more recent

Nikolay Volf authored Oct 27, 2016 and Arkadiy Paronyan committed Oct 27, 2016

* failing test

* Cache pending details

* [ci skip] updated comment

* Bumping clippy

* Fixing warnings

* Fix the "fix"

* allow taking snapshot from just-restored database without error

* make creation informant less spammy

* Ancestry iterator failure-resilient

* make uncle hash searching resilient to incomplete chain

* deduce pre-chunk info from last written block's details

* sweep most unwraps from ethcore crate

* purge unwrap from dapps server

* whitespace

[ci:none]

* Split block downloader into a module

* Snapshot sync progress

* Warp sync CLI option

* Increased snapshot chunk and ping timeouts

* Fixed an issue with delayed writes

* Updated bootnodes

* Don't run pending IO tasks on shutdown

* Optional first_block; removed insert_snapshot_block

* Fixing expect calls

* Fixed stalled sync

* style and docs

* Update block_sync.rs

[ci:skip]