* prevent slice make and copy in Pushes

* do not pad if the same length

* after CR

* linters

* linters

* linters

* lmdb tests

* trigger ci

* fix tests

* disable parallelism

* disable parallelism

* cleanup resources

* cleanup resources

* reduce concurency

* try run tests on bolt

* try run tests on bolt

* fix downloader test

* run bolt tests

* rely on interface instead of exact instance

* Rename AbstractKV to KV

* don't use separator for badger

* don't initialize badger cursor - because it not used here

* fix linter

* try reduce badger compactors

* compat with master

* try lmdb

* try lmdb

* try lmdb

* reduce badger's MaxTableSize, reduce badger's minGoMaxProc for inMem option

* allow to close closed db

* release

* release

* ideal batch size for badger

* ideal batch size for badger

* Bolt: cursor.Put

* go mod tidy

* uint256 in rlp

* uint256 rather than big.Int in Transation

* linters

* more linters

* still linters

* Reduce garbage in writeUint256

* Experiment with GC in writeByteArray

* Misc GC optimisations

* unsafe experiment with writeByteArray

* implement cursor put

* add bolt and bucket cursor.Put/Del

* increase golint confidence level to reduce renaming advises

* disable golint because go-ethereum doesn't follow it

* UI for buckets size

* z3 build cache

* z3 build cache

* circle 2.1 version

* golangci-lint up to v1.27.0

* separate z3 cache, add architecture to the key

* separate z3 cache, add architecture to the key

* rerun ci

* rerun ci

* rerun ci

* fix z3 cache

* fix z3 cache

* fix z3 cache

* try shorter

* trigger ci

* uint256 in rlp

* uint256 rather than big.Int in Transation

* linters

* more linters

* still linters

* Reduce garbage in writeUint256

* Experiment with GC in writeByteArray

* simulated backend - replace .MemCopy by .NewBatch and native transactions
close database which createtd inside simulated backend

badger-compatible trie loader (key and value in badger iterator valid only until .Next/.Seek call) (#612)

* First commit

* Fix the one-off error

* Fix formatting

* Ability to execute stage5 separately

* Clean up intermediate hashes and stage5 progress

* Fix linter

* Print original keys when extracting

* channel

* More logging

* More logging

* Remove excess logging

* fix stage2

* Revert

* Fix stage2

* Add provider exhausted

* Sort sortable buffer

* Fix test

* Another cleanup

* Remove exhaust log

* Changes

* First attempt to fix

* Sync works

* Fix compile

* Fix linter

* Fix test

* Fix test

* Debug

* Propagate tracing

* Trace default receiver

* More tracing

* Correct unfurl

* Remove tracing

* Try to retain trie for debugging

* Update to https://github.com/bitcoin-core/secp256k1/commit/05d315affe0acd02591c8db783ce1badb0c37a31

* Changes in the wrapper after the library upgrade

* Faster config for x64

* USE_ENDOMORPHISM

* Introduce hashCollector

* Add HashCollector to SubTrieLoader

* Fix linter

* Reset hashed state

* Not to regenerate the hashed state

* Not to delete state

* Fix linter

* Print expected hash in the beginning

* Simplify

* Remove initialTrie

* Use etl to buffer intermediate hashes

* Copy values, not insert empty key

* Compress instead of decompress

* Enhance file buffer logging, fix linter

* Fix compile errors

* Fix log

* Fix logging

* Exclude zero key again

* Add rewind

* Restrict timestamps

* Fix

* Fix formatting

* Incorporate separation

* Extract identityLoadFunction

* Fix formatting

* Fix test

* Fix formatting

* plain state indexes

* generalize index generation&tests

* add plain state tests

* fix regenerate index

* сoncurrent changeset chunks processing

* remove concurrency

* fix lint

* remove comments

* add test to truncate

* fix conflicts

* fmt

* remove shadowing

* initial

* gracefull shutdown for staged

* more wg fixes

* fmt

* linters

* remove generalization

* linters

* linters

* fix

* fix

* fmt

* quit into etl

* after CR

* after CR

* resetIH from scratch if needed

* lmdb

* add AbstractKV to loader, added new Object accessor around AbstractKV

* add lmdb cli flag

* add requirement of k!=nil on error in docs

* add Size method for compatibility

* read after put tests

* fix multiput nils

* simplify loops

* increase mmap size

* better error messages

* better error messages

* fix tests

* better error messages

* cleanup

* avoid bolt usage in test

* move hardcoded bucket name to dbutils

* register more buckets

* register more buckets

* fix test

* db based version of PrefixByCumulativeWitnessSize

* db based version of PrefixByCumulativeWitnessSize

* retain all in Trie by default

* fix WitnessLen logic in calcTrie roots

* Rename IntermediateTrieWitnessLenBucket to IntermediateWitnessLenBucket

* handle corner cases in WL

* Use correct incarnation for IH bucket

* use name WitnessSize

* save progress towards db-only witness estimation

* results from trie and from db are still different

* less recursion

* correct incarnation in CumulativeSearch

* reuse results from previous Tick, separate concepts of parent and startKey

* experiment: if not including trie structure to WitnessSize will reduce cumulative error

* tool to generate all IH and tool to calculate assessment of cumulative error

* tool to generate all IH

* Calculate totalWitnessSize based on DB data - then schedule will not overrun state during MGR cycle

* better stats

* Calculate totalWitnessSize based on DB data - then schedule will not overrun state during MGR cycle

* Calculate totalWitnessSize based on DB data - then schedule will not overrun state during MGR cycle

* calculate ticks size distribution

* estimate cumulative error

* fix linter

* resetIH from scratch if needed

* cleanup

* fix test

* fix test

* Not hash, keep the files

* Calculate savings

* Fix

* Fix

* Fix

* Fix

* RestAPI to support local boltdb

* Not error on read-only db

* Changes so far

* Continue

* More

* Roll back a bit

* Restore newline

* something compiles

* Fix restapi

* Fix block number

* Fix reads

* Use plain writer

* Maps for storage reads and writes

* Clean up coersions

* Fix accounts/abi/bind

* Fix tests

* More fixes

* more fixes

* More fixes

* Fixes

* Fixed core/state

* Fixed eth tests

* Move code, fix linter

* Fix test

* Fix linter

* Fix linter

* Fix linter, badger_db to support AbstractKV

* Increase IdealBatchSize for badger

* Fix linter

* Fix linter

* Move promotion before the shortcut

* Correct the logs

* Trying without the encoder

* Revert "Trying without the encoder"

This reverts commit 24c526bc2791fb6806b1c0d4f52a43b87c3959b9.

* Commit to db, not to the mutation

* Fix log more

* No need to log every deleted file

* Use uint256 for account balance

* linter

* Explicit map of incarnations

* Fix linter