* add context

* extract chain events

* run commit in goroutines

* mine only on canonical

* typo

* linters

* fmt

* mark unused methods

* restore stress test

* test single miner

* remove unsafe Trie storage

* remove locks from miner

* restore interrupt

* remove result goroutine

* remove unconfirmedBlocks

* cherry-pick 04a1d475ff1a36ad8f92fec80385df18c52bdc1f

* extract uncles

* one miner succeeded

* restore context cancel

* cleanup

* skip an unstable test

* remove pending state

* use context instead of interrupt func

* calculate sealHash only once

* comment out unstable test

* after merge

* fix after merge

Co-authored-by: ledgerwatch <akhounov@gmail.com>

* Fix rewinding

* Fix rewinding

* add env INTERMEDIATE_TRIE_CACHE
* try to use assert.New() pattern
* Fix "maligned" linter warnings to reduce space consumption of structs:

core/types/accounts/account.go:18:14: struct of size 136 bytes could be of size 128 bytes (maligned)
type Account struct {
--
trie/node.go:44:10: struct of size 80 bytes could be of size 72 bytes (maligned)
	duoNode struct {
--
trie/resolve_set.go:28:17: struct of size 56 bytes could be of size 48 bytes (maligned)
type ResolveSet struct {
--
trie/resolver.go:34:15: struct of size 88 bytes could be of size 72 bytes (maligned)
type Resolver struct {
--
trie/visual.go:32:17: struct of size 104 bytes could be of size 96 bytes (maligned)
type VisualOpts struct {

* add intermediate trie hashes bucket
* update docs
* use version of CompressNibbles with buf pool (less GC) but without io.ByteWriter (slow)

* Trace first block

* Fixes for CalcTrieRoots

* Timings of the CalcTrieRoot

* Fix lint

* Add memory profiling

* Reduce allocations in StreamHash

* Fix

* Fix

* Fix

* Optimise allocations

* Reuse streams

* Fixes

* Fix

* Unit test fix

* Fix lint

* Reuse hashbuilder

* No loop

* Reuse resolver

* Fixed tests

* Fix test

* Fix test

* Fix test

* Fix witness threshold

* Optimise allocations in RLP transform

* Optimise allocations in RLP transform

* Optimise branchHash

* 100 times again

* Replace ToStream with Iterator

* StreamMergeIterator

* No streams

* Amplification

* Minimise the use of hashOnly

* 100 times

* Reduce stack operations

* Reduce appends

* More optimisations

* More optimisations

* More optimisations

* local hex

* Small fix

* Remove test

* Fix lint

* Fix lint

* Fix lint

* Add test for empty

* Fix lint

* More tests

* Fix lint

* Add measurement of stateless exec

* trie/tests: add benchmarks and update trie tests

* trie: update benchmark tests

* trie: utilize callbacks instead of amassing lists of hashes in database ref/unref

* trie: replace remaining non-callback based accesses

* core: write chain data in atomic way

* core, light: address comments

* core, light: fix linter

* core, light: address comments

This change works around the 32k RDATA character limit per change
request and fixes several issues in the deployer which prevented it from
working for our production trees.

This is a temporary fix for a problem which started happening when the
dialer was changed to read nodes from an enode.Iterator. Before the
iterator change, discovery queries would always return within a couple
seconds even if there was no Internet access. Since the iterator won't
return unless a node is actually found, discoverTask can take much
longer. This means that the 'emergency connect' logic might not execute
in time, leading to a stuck node.

* p2p: wait for goroutine exit, fixes #20558

* p2p: wait for all slots on exit

Co-authored-by: Martin Holst Swende <martin@swende.se>

* build: upgrade golangci to 1.22.2

* .golangci.yml: don't fail on asset deadcode

* build: put GOPATH in /tmp on launchpad

* build: don't remove GOPATH from go tool environment

* build: remove env.sh

This removes the dirty symlink-to-self hack we've had for years. The
script was added to enable building without GOPATH and did that job
reliably for all this time. We can remove the workaround because modern
Go supports building without GOPATH natively.

* Makefile: add GO111MODULE=on to environment

* tests for tx size

* alow multiple slots transactions

* tests for tx size limit (32 KB)

* change tx size tests to use addRemoteSync instead of validateTx (requested in pool request).

* core: minor tx slotting polishes, add slot tracking metric

Co-authored-by: Michael Riabzev <RiabzevMichael@gmail.com>
Co-authored-by: Péter Szilágyi <peterke@gmail.com>

This reverts commit a1bc0e3c.

* internal/testlog: print file+line number of log call in test log

This changes the unit test logger to print the actual file and line
number of the logging call instead of "testlog.go:44".

Output of 'go test -v -run TestServerListen ./p2p' before this change:

    === RUN   TestServerListen
    --- PASS: TestServerListen (0.00s)
        testlog.go:44: DEBUG[01-08|15:16:31.651] UDP listener up         addr=127.0.0.1:62678
        testlog.go:44: DEBUG[01-08|15:16:31.651] TCP listener up         addr=127.0.0.1:62678
        testlog.go:44: TRACE[01-08|15:16:31.652] Accepted connection     addr=127.0.0.1:62679

And after:

    === RUN   TestServerListen
    --- PASS: TestServerListen (0.00s)
        server.go:868: DEBUG[01-08|15:25:35.679] TCP listener up         addr=127.0.0.1:62712
        server.go:557: DEBUG[01-08|15:25:35.679] UDP listener up         addr=127.0.0.1:62712
        server.go:912: TRACE[01-08|15:25:35.680] Accepted connection     addr=127.0.0.1:62713

* internal/testlog: document use of t.Helper

Update copyright from 2013-2019 to 2013-2020

* add node.go unit test file node_test.go

* add node_test.go file license and rollback trie_test.go

* fix unused variable v

* trie: fix license year

Co-authored-by: Péter Szilágyi <peterke@gmail.com>

* les: move the checkpoint oracle into its own package

It's first step of refactor LES package. LES package
basically can be divided into LES client and LES server.
However both sides will use checkpoint package for
status retrieval and verification. So this PR moves
checkpoint oracle into a separate package

* les: address comments

Fixes #19024
Fixes #19332

This commit intents to replicate the DialHTTPWithClient function which allows
creating a RPC Client using a custom dialer but for websockets.

We introduce a new DialWebsocketWithDialer function which allows the caller
to instantiate a new websocket client using a custom dialer.