* to_rlp takes self by-reference

* clean up some derefs

* out-of-order insertion for blockchain

* implement block rebuilder without verification

* group block chunk header into struct

* block rebuilder does verification

* integrate snapshot service with client service; flesh out implementation more

* initial implementation of snapshot service

* remove snapshottaker trait

* snapshot writer trait with packed and loose implementations

* write chunks using "snapshotwriter" in service

* have snapshot taking use snapshotwriter

* implement snapshot readers

* back up client dbs when replacing

* use snapshot reader in snapshot service

* describe offset format

* use new get_db_path in parity, allow some errors in service

* blockchain formatting

* implement parity snapshot

* implement snapshot restore

* force blocks to be submitted in order

* fix bug loading block hashes in packed reader

* fix seal field loading

* fix uncle hash computation

* fix a few bugs

* store genesis state in db. reverse block chunk order in packed writer

* allow out-of-order import for blocks

* bring restoration types together

* only snapshot the last 30000 blocks

* restore into overlaydb instead of journaldb

* commit version to database

* use memorydbs and commit directly

* fix trie test compilation

* fix failing tests

* sha3_null_rlp, not H256::zero

* move overlaydb to ref_overlaydb, add new overlaydb without on-disk rc

* port archivedb to new overlaydb

* add deletion mode tests for overlaydb

* use new overlaydb, check state root at end

* share chain info between state and block snapshotting

* create blocks snapshot using blockchain directly

* allow snapshot from arbitrary block, remove panickers from snapshot creation

* begin test framework

* blockchain chunking test

* implement stateproducer::tick

* state snapshot test

* create block and state chunks concurrently, better restoration informant

* fix tests

* add deletion mode tests for overlaydb

* address comments

* more tests

* Fix up tests.

* remove a few printlns

* add a little more documentation to `commit`

* fix tests

* fix ref_overlaydb test names

* snapshot command skeleton

* revert ref_overlaydb renaming

* reimplement snapshot commands

* fix many errors

* everything but inject

* get ethcore compiling

* get snapshot tests passing again

* instrument snapshot commands again

* fix fallout from other changes, mark snapshots as experimental

* optimize injection patterns

* do two injections

* fix up tests

* take snapshots from 1000 blocks efore

* address minor comments

* fix a few io crate related errors

* clarify names about total difficulty

[ci skip]

* Buffered DB

* Use identity hash for MemoryDB

* Various tweaks

* Delayed DB compression

* Reduce last_hashes cloning

* Keep state cache

* Updating tests

* Optimized to_big_int

* Fixing build with stable

* Safer code

* Bumping clippy

* Fixing clippy warnings

* Cargo.lock (latest nightly?)

* removed configure_cache method

* generic cache_manager struct

* fixed #1743, tracing caches are cleared

* removed deadlocks in garbage_collect, implemented HeapSizeOf for traces

* trace cache config

* fixed carbage typo

* Consolidation migration

* Started db amalgamation

* Using client constants for columns

* Adding with_columns constructor

* Migrating to single db

* Fixing tests.

* test.sh without verbose

* Fixing warnings

* add migration tests that catch the bug

* make multiple migrations more robust

* add moved v9

* Merge branch 'noop-migrations' into single-db

* spurious line

* clean up migrations ordering

* update comment [ci skip]

* Bumping default number of max_open_files & re-ordering columns.

* fix merge

* fix ignored analysis tests

* Caching best block content

* Faster best_block_header

* Adding progress to v8 migration

* clean up warnings

* Separate hashes and bodies in the DB

* Separate hashes and bodies in the DB

* Fixed tests

* new Compressible rlp trait

* new Compressible rlp trait

* make compressed rlp iterable

* make compressed rlp iterable

* invalid rlp slice swapper

* switch compress to swapper, add reverse swapper test case

* add basic account compression test

* add new rlp trait

* new Compressible rlp trait

* make compressed rlp iterable

* invalid rlp slice swapper

* invalid rlp slice swapper

* switch compress to swapper, add reverse swapper test case

* switch compress to swapper, add reverse swapper test case

* add account compress/ decompress test

* make compressor cleaner, use hashmaps for swapper

* improve compression tests

* add a DecompressingDecoder, change Decoder to take refernce

* separate rlp compression related stuff

* new Compressible rlp trait

* new Compressible rlp trait

* new Compressible rlp trait

* make compressed rlp iterable

* make compressed rlp iterable

* make compressed rlp iterable

* invalid rlp slice swapper

* invalid rlp slice swapper

* invalid rlp slice swapper

* switch compress to swapper, add reverse swapper test case

* switch compress to swapper, add reverse swapper test case

* switch compress to swapper, add reverse swapper test case

* add basic account compression test

* add new rlp trait

* add account compress/ decompress test

* make compressor cleaner, use hashmaps for swapper

* improve compression tests

* add a DecompressingDecoder, change Decoder to take refernce

* separate rlp compression related stuff

* DecompressingDecoder test

* initial compressing HashDB wrapper

* remove unused test

* change CompressedDB to struct wrapper with overlay

* simplify compressor

* failed RefCell attempt

* use denote to return reference

* compiled compresseddb

* compressdb test, add overlay emplace

* fix overlay reference count handling

* add immutable compresseddb, make account use hashdb

* simplify using trait objects

* enable hashdb for account

* initial state compression attempt

* wrap state db

* add tests for analyzing db

* add account predicate

* try to compress data fields as rlp too

* remove compression for storage trie

* add a compressing migration

* more compression stats tests

* fix migration import

* nested encoding compression test

* fix decompression, move db stats tests to rlpcompression

* added malformed rlp tests, cover a few edge cases

* new CompressingEncoder struct

* extend migrations to state

* first version working on the whole db

* clean up Compressible impl

* tests cleanup

* add a testing migration

* refactor deep compression using option, add simple compression

* put tests in a module

* fix compressed overlay loading

* simple compression for snapshots

* remove unused DecompressingDecoder

* add a general compressing migration

* add more common rlps to compress

* use static slices for swapper

* add precomputed hashes and invalid rlps

* make decoder private again

* cover more cases with tests

* style

* fix weird indentation

* remove possible panic in payload_info

* make prefix checking safe

* fix db existence check

* remove db dir from test

* pass usize by value [ci skip]

* Improve comment on panic removal.

* add common blocks db rlps

* add compression to blockchain db

* add blocks db migration

* fix the migrations

* remove state compression

* add a separate snapshot swapper

* ability to use different swappers and traversal

* update tests to new interface

* clean up code ordering

* update usage

* fix compilation

* remove unnecessary changes

* move methods to functions to reduce interface

* move test to module

* update common rlps to blocks db

* move tests to tests modules

* remove redundant &

* Fixing warnings

* Fixing unnecessary ref

* Removing unnecessary operation

* Log a chain-reorg.

* Nicer output

* Use imported rather than enacted.

Enacted can include previously imported blocks which makes the
info incorrect.

* Enable WAL

* Disable rewind

* Use tree index for DB

* Set uncles_hash, tx_root, receipts_root from verified block

* Use Filth instead of a bool

* Fix empty root check

* Flush block queue properly

* Expunge deref

* BC locking; Recovery batch

* Missing state root recovery

* Test

* Optimize ethash verification

* disable WAL for puts

* Clear account cache after commit

* Commit only modified accounts

* Optimize existing block check

* Cache last hashes

* parking_lot in cargo.toml

* replace all lock invocations with parking_lot ones

* use parking_lot synchronization primitives

* use bloomchain crate in blockchain module. remove obsole chainfilter submodule

* update database version to 6.0

* removed redundant line

* simple db migration

* make migration slightly more functional

* bloomchain migration

* migration version is just a single unsigned integer

* updated migration v6

* parity migration

* db migration

* removed hardcoded migration dir

* replace ptr::copy with clone_from_slice, removed potential endianess problem from trace/db.rs

* removed superfluous line

* blockchains log blooms config is not exposed any more

Moving all Client public API types to separate mod & binary serialization codegen for that mod (#1051)

* transaction moved

* trash remove

* ids move

* receipt

* tree-route

* blockchain info

* log_entry move

* trace filter moved

* executed & trace moved

* localized trace moved

* block status moved

* build scripts and codegen refs

* Cargo.lock update

* binary for blockstatus, blockchaininfo

* binary for trace

* trace filters binary ser

* binary for log entries & executed

* binary for receipt

* special case for u8 & transaction binary attribute

* resolved remaining issues & error binary serialization

* json-tests util import

* fix warnings

* ids attr

* add missing attributes

* Update build.rs

* fixed encoding 0u8

* simplified if else stmt

* tracedb core

* more comprehensive tracedb tests

* fixed minor review issues

* addresses filter

* fixed typos

* replace malformed with corrupted

* trace switch

* db key is generic and can be made smaller

* smaller tracedb keys

* tracedb version

* fixed ignored tests

* rename Tracedb -> TraceDB

* fixed typos

* proves

* trace only top level calls to builtins to avoid DDoS attacks

* fixed tracedb config switches

* fix comments fat replaced with trace

* vector-addressing scheme for localized traces

* removed comments

* removed first, redundant 0 from trace address

* updated db.trace method

* additional tests for tracedb.trace()