This removes auto-configuration of the snap.*.ethdisco.net DNS discovery tree.
Since measurements have shown that > 75% of nodes in all.*.ethdisco.net support
snap, we have decided to retire the dedicated index for snap and just use the eth
tree instead.

The dial iterators of eth and snap now use the same DNS tree in the default configuration,
so both iterators should use the same DNS discovery client instance. This ensures that
the record cache and rate limit are shared. Records will not be requested multiple times.

While testing the change, I noticed that duplicate DNS requests do happen even
when the client instance is shared. This is because the two iterators request the tree
root, link tree root, and first levels of the tree in lockstep. To avoid this problem, the
change also adds a singleflight.Group instance in the client. When one iterator
attempts to resolve an entry which is already being resolved, the singleflight object
waits for the existing resolve call to finish and returns the entry to both places.

* trie: add benchmark for proofless range

* trie: remove unused returns + use stacktrie

This PR makes the gas price oracle ignore transactions priced at `<=1 wei`.

* eth/protocols/snap: generate storage trie from full dirty snap data

* eth/protocols/snap: get rid of some more dead code

* eth/protocols/snap: less frequent logs, also log during trie generation

* eth/protocols/snap: implement dirty account range stack-hashing

* eth/protocols/snap: don't loop on account trie generation

* eth/protocols/snap: fix account format in trie

* core, eth, ethdb: glue snap packets together, but not chunks

* eth/protocols/snap: print completion log for snap phase

* eth/protocols/snap: extended tests

* eth/protocols/snap: make testcase pass

* eth/protocols/snap: fix account stacktrie commit without defer

* ethdb: fix key counts on reset

* eth/protocols: fix typos

* eth/protocols/snap: make better use of delivered data (#44)

* eth/protocols/snap: make better use of delivered data

* squashme

* eth/protocols/snap: reduce chunking

* squashme

* eth/protocols/snap: reduce chunking further

* eth/protocols/snap: break out hash range calculations

* eth/protocols/snap: use sort.Search instead of looping

* eth/protocols/snap: prevent crash on storage response with no keys

* eth/protocols/snap: nitpicks all around

* eth/protocols/snap: clear heal need on 1-chunk storage completion

* eth/protocols/snap: fix range chunker, add tests

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

* trie: fix test API error

* eth/protocols/snap: fix some further liter issues

* eth/protocols/snap: fix accidental batch reuse

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

* build: upgrade to golangci-lint v1.39.0

* consensus/ethash: fix go vet warning regarding reflect.SliceHeader

* eth/catalyst: fix lint issue

* consensus/ethash: fix bug in memoryMapFile

* eth/protocols, prp/tracker: add support for req/rep rtt tracking

* p2p/tracker: sanity cap the number of pending requests

* pap/tracker: linter <3

* p2p/tracker: disable entire tracker if no metrics are enabled

Adds an an optional parameter `overrides *map[common.Address]account` to the `eth_call` API in order for the caller to  can customize the state.

This change adds the --catalyst flag, enabling an RPC API for eth2 integration.
In this initial version, catalyst mode also disables all peer-to-peer networking.

Co-authored-by: Mikhail Kalinin <noblesse.knight@gmail.com>
Co-authored-by: Felix Lange <fjl@twurst.com>

* all: add thousandths separators for big numbers on log messages

* p2p/sentry: drop accidental file

* common, log: add fast number formatter

* common, eth/protocols/snap: simplifty fancy num types

* log: handle nil big ints

* eth/protocols: persist received state segments

* core: initial implementation

* core/state/snapshot: add tests

* core, eth: updates

* eth/protocols/snapshot: count flat state size

* core/state: add metrics

* core/state/snapshot: skip unnecessary deletion

* core/state/snapshot: rename

* core/state/snapshot: use the global batch

* core/state/snapshot: add logs and fix wiping

* core/state/snapshot: fix

* core/state/snapshot: save generation progress even if the batch is empty

* core/state/snapshot: fixes

* core/state/snapshot: fix initial account range length

* core/state/snapshot: fix initial account range

* eth/protocols/snap: store flat states during the healing

* eth/protocols/snap: print logs

* core/state/snapshot: refactor (#4)

* core/state/snapshot: refactor

* core/state/snapshot: tiny fix and polish

Co-authored-by: rjl493456442 <garyrong0905@gmail.com>

* core, eth: fixes

* core, eth: fix healing writer

* core, trie, eth: fix paths

* eth/protocols/snap: fix encoding

* eth, core: add debug log

* core/state/generate: release iterator asap (#5)

core/state/snapshot: less copy

core/state/snapshot: revert split loop

core/state/snapshot: handle storage becoming empty, improve test robustness

core/state: test modified codehash

core/state/snapshot: polish

* core/state/snapshot: optimize stats counter

* core, eth: add metric

* core/state/snapshot: update comments

* core/state/snapshot: improve tests

* core/state/snapshot: replace secure trie with standard trie

* core/state/snapshot: wrap return as the struct

* core/state/snapshot: skip wiping correct states

* core/state/snapshot: updates

* core/state/snapshot: fixes

* core/state/snapshot: fix panic due to reference flaw in closure

* core/state/snapshot: fix errors in state generation logic + fix log output

* core/state/snapshot: remove an error case

* core/state/snapshot: fix condition-check for exhausted snap state

* core/state/snapshot: use stackTrie for small tries

* core/state/snapshot: don't resolve small storage tries in vain

* core/state/snapshot: properly clean up storage of deleted accounts

* core/state/snapshot: avoid RLP-encoding in some cases + minor nitpicks

* core/state/snapshot: fix error (+testcase)

* core/state/snapshot: clean up tests a bit

* core/state/snapshot: work in progress on better tests

* core/state/snapshot: polish code

* core/state/snapshot: fix trie iteration abortion trigger

* core/state/snapshot: fixes flaws

* core/state/snapshot: remove panic

* core/state/snapshot: fix abort

* core/state/snapshot: more tests (plus failing testcase)

* core/state/snapshot: more testcases + fix for failing test

* core/state/snapshot: testcase for malformed data

* core/state/snapshot: some test nitpicks

* core/state/snapshot: improvements to logging

* core/state/snapshot: testcase to demo error in abortion

* core/state/snapshot: fix abortion

* cmd/geth: make verify-state report the root

* trie: fix failing test

* core/state/snapshot: add timer metrics

* core/state/snapshot: fix metrics

* core/state/snapshot: udpate tests

* eth/protocols/snap: write snapshot account even if code or state is needed

* core/state/snapshot: fix diskmore check

* core/state/snapshot: review fixes

* core/state/snapshot: improve error message

* cmd/geth: rename 'error' to 'err' in logs

* core/state/snapshot: fix some review concerns

* core/state/snapshot, eth/protocols/snap: clear snapshot marker when starting/resuming snap sync

* core: add error log

* core/state/snapshot: use proper timers for metrics collection

* core/state/snapshot: address some review concerns

* eth/protocols/snap: improved log message

* eth/protocols/snap: fix heal logs to condense infos

* core/state/snapshot: wait for generator termination before restarting

* core/state/snapshot: revert timers to counters to track total time

Co-authored-by: Martin Holst Swende <martin@swende.se>
Co-authored-by: Péter Szilágyi <peterke@gmail.com>

Co-authored-by: Felix Lange <fjl@twurst.com>

* core/vm: implement AccessListTracer

* eth: implement debug.createAccessList

* core/vm: fixed nil panics in accessListTracer

* eth: better error messages for createAccessList

* eth: some fixes on CreateAccessList

* eth: allow for provided accesslists

* eth: pass accesslist by value

* eth: remove created acocunt from accesslist

* core/vm: simplify access list tracer

* core/vm: unexport accessListTracer

* eth: return best guess if al iteration times out

* eth: return best guess if al iteration times out

* core: docstring, unexport methods

* eth: typo

* internal/ethapi: move createAccessList to eth package

* internal/ethapi: remove reexec from createAccessList

* internal/ethapi: break if al is equal to last run, not if gas is equal

* internal/web3ext: fixed arguments

* core/types: fixed equality check for accesslist

* core/types: no hardcoded vals

* core, internal: simplify access list generation, make it precise

* core/vm: fix typo

Co-authored-by: Martin Holst Swende <martin@swende.se>
Co-authored-by: Péter Szilágyi <peterke@gmail.com>

* eth, les: fix tracer

* eth: isolate live trie database in tracer

* eth: fix nil

* eth: fix

* eth, les: add checkLive param

* eth/tracer: fix

This removes the duplicated definition of eth_chainID
in package eth and updates the definition in internal/ethapi
to treat chain ID as a bigint.

Co-authored-by: Felix Lange <fjl@twurst.com>

The PR implements the --miner.notify.full flag that enables full pending block
notifications. When this flag is used, the block notifications sent to mining
endpoints contain the complete block header JSON instead of a work package
array.

Co-authored-by: AlexSSD7 <alexandersadovskyi7@protonmail.com>
Co-authored-by: Martin Holst Swende <martin@swende.se>

This avoids synchronisation failures when the local header is ahead of
the local full block.

Fixes the CaptureStart api to include the EVM, thus being able to set the statedb early on. This pr also exposes the struct we used internally in the interpreter to encapsulate the contract, mem, stack, rstack, so we pass it as a single struct to the tracer, and removes the error returns on the capture methods. 

* eth/protocols/snap: fix snap sync

* eth/protocols/snap: fix tests

* eth: fix tiny

* eth: update tests

* eth: update tests

* core/state/snapshot: testcase for #22534

* eth/protocols/snap: fix boundary loss on full-but-proven range

* core/state/snapshot: lintfix

* eth: address comment

* eth: fix handler

Co-authored-by: Martin Holst Swende <martin@swende.se>
Co-authored-by: Péter Szilágyi <peterke@gmail.com>