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nimbus-eth2/tests/consensus_spec/test_fixture_fork_choice.nim

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# beacon_chain
# Copyright (c) 2018-2024 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
{.push raises: [].}
{.used.}
import
# Status libraries
stew/byteutils, chronicles,
taskpools,
# Internals
../../beacon_chain/spec/[helpers, forks, state_transition_block],
../../beacon_chain/fork_choice/[fork_choice, fork_choice_types],
../../beacon_chain/[beacon_chain_db, beacon_clock],
../../beacon_chain/consensus_object_pools/[
blockchain_dag, block_clearance, block_quarantine, spec_cache],
# Third-party
yaml/tojson,
# Test
../testutil, ../testdbutil,
./fixtures_utils, ./os_ops
from std/json import
JsonNode, getBool, getInt, getStr, hasKey, items, len, pairs, `$`, `[]`
from std/sequtils import mapIt, toSeq
from std/strutils import contains
from ../testbcutil import addHeadBlock
# Test format described at https://github.com/ethereum/consensus-specs/tree/v1.3.0/tests/formats/fork_choice
# Note that our implementation has been optimized with "ProtoArray"
# instead of following the spec (in particular the "store").
type
OpKind = enum
opOnTick
opOnAttestation
opOnBlock
opOnMergeBlock
opOnAttesterSlashing
opInvalidateHash
opChecks
BlobData = object
blobs: seq[KzgBlob]
proofs: seq[KzgProof]
Operation = object
valid: bool
# variant specific fields
case kind: OpKind
of opOnTick:
tick: int
of opOnAttestation:
att: phase0.Attestation
of opOnBlock:
blck: ForkedSignedBeaconBlock
blobData: Opt[BlobData]
of opOnMergeBlock:
powBlock: PowBlock
of opOnAttesterSlashing:
attesterSlashing: phase0.AttesterSlashing
of opInvalidateHash:
invalidatedHash: Eth2Digest
latestValidHash: Eth2Digest
of opChecks:
checks: JsonNode
proc initialLoad(
path: string, db: BeaconChainDB,
StateType, BlockType: typedesc
): tuple[dag: ChainDAGRef, fkChoice: ref ForkChoice] {.raises: [
IOError, UnconsumedInput].} =
let
forkedState = loadForkedState(
path/"anchor_state.ssz_snappy",
StateType.kind)
blck = parseTest(
path/"anchor_block.ssz_snappy",
SSZ, BlockType)
ChainDAGRef.preInit(db, forkedState[])
let
validatorMonitor = newClone(ValidatorMonitor.init())
dag = ChainDAGRef.init(
forkedState[].kind.genesisTestRuntimeConfig, db, validatorMonitor, {})
fkChoice = newClone(ForkChoice.init(
dag.getFinalizedEpochRef(), dag.finalizedHead.blck,
ForkChoiceVersion.Pr3431))
(dag, fkChoice)
proc loadOps(
path: string,
fork: ConsensusFork
): seq[Operation] {.raises: [
IOError, KeyError, UnconsumedInput, ValueError,
YamlConstructionError, YamlParserError].} =
let stepsYAML = os_ops.readFile(path/"steps.yaml")
let steps = loadToJson(stepsYAML)
result = @[]
for step in steps[0]:
var numExtraFields = 0
if step.hasKey"tick":
result.add Operation(kind: opOnTick,
tick: step["tick"].getInt())
elif step.hasKey"attestation":
let filename = step["attestation"].getStr()
let att = parseTest(
path/filename & ".ssz_snappy",
SSZ, phase0.Attestation
)
result.add Operation(kind: opOnAttestation,
att: att)
elif step.hasKey"block":
let filename = step["block"].getStr()
doAssert step.hasKey"blobs" == step.hasKey"proofs"
withConsensusFork(fork):
let
blck = parseTest(
path/filename & ".ssz_snappy",
SSZ, consensusFork.SignedBeaconBlock)
blobData =
when consensusFork >= ConsensusFork.Deneb:
if step.hasKey"blobs":
numExtraFields += 2
Opt.some BlobData(
blobs: distinctBase(parseTest(
path/(step["blobs"].getStr()) & ".ssz_snappy",
SSZ, List[KzgBlob, Limit MAX_BLOBS_PER_BLOCK])),
proofs: step["proofs"].mapIt(
KzgProof(bytes: fromHex(array[48, byte], it.getStr()))))
else:
Opt.none(BlobData)
else:
doAssert not step.hasKey"blobs"
Opt.none(BlobData)
result.add Operation(kind: opOnBlock,
blck: ForkedSignedBeaconBlock.init(blck),
blobData: blobData)
elif step.hasKey"attester_slashing":
let filename = step["attester_slashing"].getStr()
let attesterSlashing = parseTest(
path/filename & ".ssz_snappy",
SSZ, phase0.AttesterSlashing
)
result.add Operation(kind: opOnAttesterSlashing,
attesterSlashing: attesterSlashing)
elif step.hasKey"payload_status":
if step["payload_status"]["status"].getStr() == "INVALID":
result.add Operation(kind: opInvalidateHash,
valid: true,
invalidatedHash: Eth2Digest.fromHex(step["block_hash"].getStr()),
latestValidHash: Eth2Digest.fromHex(
step["payload_status"]["latest_valid_hash"].getStr()))
elif step.hasKey"checks":
result.add Operation(kind: opChecks,
checks: step["checks"])
else:
raiseAssert "Unknown test step: " & $step
if step.hasKey"valid":
doAssert step.len == 2 + numExtraFields
result[^1].valid = step["valid"].getBool()
elif not step.hasKey"checks" and not step.hasKey"payload_status":
doAssert step.len == 1 + numExtraFields
result[^1].valid = true
proc stepOnBlock(
dag: ChainDAGRef,
fkChoice: ref ForkChoice,
verifier: var BatchVerifier,
state: var ForkedHashedBeaconState,
stateCache: var StateCache,
signedBlock: ForkySignedBeaconBlock,
blobData: Opt[BlobData],
time: BeaconTime,
invalidatedHashes: Table[Eth2Digest, Eth2Digest]):
Result[BlockRef, VerifierError] =
# 1. Validate blobs
when typeof(signedBlock).kind >= ConsensusFork.Deneb:
let kzgCommits = signedBlock.message.body.blob_kzg_commitments.asSeq
if kzgCommits.len > 0 or blobData.isSome:
if blobData.isNone or kzgCommits.validate_blobs(
blobData.get.blobs, blobData.get.proofs).isErr:
return err(VerifierError.Invalid)
else:
doAssert blobData.isNone, "Pre-Deneb test with specified blob data"
# 2. Move state to proper slot
doAssert dag.updateState(
state,
dag.getBlockIdAtSlot(time.slotOrZero).expect("block exists"),
save = false,
stateCache
)
# 3. Add block to DAG
const consensusFork = typeof(signedBlock).kind
# In normal Nimbus flow, for this (effectively) newPayload-based INVALID, it
# is checked even before entering the DAG, by the block processor. Currently
# the optimistic sync test(s) don't include a later-fcU-INVALID case. Whilst
# this wouldn't be part of this check, presumably, their FC test vector step
# would also have `true` validity because it'd not be known they weren't, so
# adding this mock of the block processor is realistic and sufficient.
when consensusFork >= ConsensusFork.Bellatrix:
let executionBlockHash =
signedBlock.message.body.execution_payload.block_hash
if executionBlockHash in invalidatedHashes:
# Mocks fork choice INVALID list application. These tests sequence this
# in a way the block processor does not, specifying each payload_status
# before the block itself, while Nimbus fork choice treats invalidating
# a non-existent block root as a no-op and does not remember it for the
# future.
let lvh = invalidatedHashes.getOrDefault(
executionBlockHash, static(default(Eth2Digest)))
fkChoice[].mark_root_invalid(dag.getEarliestInvalidBlockRoot(
signedBlock.message.parent_root, lvh, executionBlockHash))
return err VerifierError.Invalid
let blockAdded = dag.addHeadBlock(verifier, signedBlock) do (
blckRef: BlockRef, signedBlock: consensusFork.TrustedSignedBeaconBlock,
epochRef: EpochRef, unrealized: FinalityCheckpoints):
# 4. Update fork choice if valid
let status = fkChoice[].process_block(
dag, epochRef, blckRef, unrealized, signedBlock.message, time)
doAssert status.isOk()
# 5. Update DAG with new head
var quarantine = Quarantine.init()
let newHead = fkChoice[].get_head(dag, time).get()
dag.updateHead(dag.getBlockRef(newHead).get(), quarantine, [])
if dag.needStateCachesAndForkChoicePruning():
dag.pruneStateCachesDAG()
let pruneRes = fkChoice[].prune()
doAssert pruneRes.isOk()
blockAdded
proc stepChecks(
checks: JsonNode,
dag: ChainDAGRef,
fkChoice: ref ForkChoice,
time: BeaconTime) {.raises: [KeyError].} =
doAssert checks.len >= 1, "No checks found"
for check, val in checks:
if check == "time":
doAssert time.ns_since_genesis == val.getInt().seconds.nanoseconds()
doAssert fkChoice.checkpoints.time.slotOrZero == time.slotOrZero
elif check == "head":
let headRoot = fkChoice[].get_head(dag, time).get()
let headRef = dag.getBlockRef(headRoot).get()
doAssert headRef.slot == Slot(val["slot"].getInt())
doAssert headRef.root == Eth2Digest.fromHex(val["root"].getStr())
elif check == "justified_checkpoint":
let checkpointRoot = fkChoice.checkpoints.justified.checkpoint.root
let checkpointEpoch = fkChoice.checkpoints.justified.checkpoint.epoch
doAssert checkpointEpoch == Epoch(val["epoch"].getInt())
doAssert checkpointRoot == Eth2Digest.fromHex(val["root"].getStr())
elif check == "justified_checkpoint_root": # undocumented check
let checkpointRoot = fkChoice.checkpoints.justified.checkpoint.root
doAssert checkpointRoot == Eth2Digest.fromHex(val.getStr())
elif check == "finalized_checkpoint":
let checkpointRoot = fkChoice.checkpoints.finalized.root
let checkpointEpoch = fkChoice.checkpoints.finalized.epoch
doAssert checkpointEpoch == Epoch(val["epoch"].getInt())
doAssert checkpointRoot == Eth2Digest.fromHex(val["root"].getStr())
elif check == "best_justified_checkpoint":
let checkpointRoot = fkChoice.checkpoints.best_justified.root
let checkpointEpoch = fkChoice.checkpoints.best_justified.epoch
doAssert checkpointEpoch == Epoch(val["epoch"].getInt())
doAssert checkpointRoot == Eth2Digest.fromHex(val["root"].getStr())
elif check == "proposer_boost_root":
doAssert fkChoice.checkpoints.proposer_boost_root ==
Eth2Digest.fromHex(val.getStr())
elif check == "genesis_time":
# We do not store genesis in fork choice..
discard
else:
raiseAssert "Unsupported check '" & $check & "'"
proc doRunTest(
path: string,
fork: ConsensusFork
) {.raises: [
IOError, KeyError, UnconsumedInput, ValueError,
YamlConstructionError, YamlParserError].} =
let db = BeaconChainDB.new("", inMemory = true)
defer:
db.close()
let
stores = withConsensusFork(fork):
initialLoad(
path, db, consensusFork.BeaconState, consensusFork.BeaconBlock)
rng = HmacDrbgContext.new()
taskpool =
try:
Taskpool.new()
except Exception as exc:
fatal "Failed to initialize Taskpool", exc = exc.msg
fail()
return
var verifier = BatchVerifier.init(rng, taskpool)
let steps = loadOps(path, fork)
var time = stores.fkChoice.checkpoints.time
var invalidatedHashes: Table[Eth2Digest, Eth2Digest]
let state = newClone(stores.dag.headState)
var stateCache = StateCache()
for step in steps:
case step.kind
of opOnTick:
time = BeaconTime(ns_since_genesis: step.tick.seconds.nanoseconds)
let status = stores.fkChoice[].update_time(stores.dag, time)
doAssert status.isOk == step.valid
of opOnAttestation:
let status = stores.fkChoice[].on_attestation(
stores.dag, step.att.data.slot, step.att.data.beacon_block_root,
toSeq(stores.dag.get_attesting_indices(step.att.asTrusted)), time)
doAssert status.isOk == step.valid
of opOnBlock:
withBlck(step.blck):
let status = stepOnBlock(
stores.dag, stores.fkChoice,
verifier, state[], stateCache,
forkyBlck, step.blobData, time, invalidatedHashes)
doAssert status.isOk == step.valid
of opOnAttesterSlashing:
let indices =
check_attester_slashing(state[], step.attesterSlashing, flags = {})
if indices.isOk:
for idx in indices.get:
stores.fkChoice[].process_equivocation(idx)
doAssert indices.isOk == step.valid
of opInvalidateHash:
invalidatedHashes[step.invalidatedHash] = step.latestValidHash
of opChecks:
stepChecks(step.checks, stores.dag, stores.fkChoice, time)
else:
raiseAssert "Unsupported"
proc runTest(suiteName: static[string], path: string, fork: ConsensusFork) =
const SKIP = [
# protoArray can handle blocks in the future gracefully
# spec: https://github.com/ethereum/consensus-specs/blame/v1.1.3/specs/phase0/fork-choice.md#L349
# test: tests/fork_choice/scenarios/no_votes.nim
# "Ensure the head is still 4 whilst the justified epoch is 0."
"on_block_future_block",
# TODO on_merge_block
"too_early_for_merge",
"too_late_for_merge",
"block_lookup_failed",
"all_valid",
# TODO intentional reorgs
"should_override_forkchoice_update__false",
"should_override_forkchoice_update__true",
"basic_is_parent_root",
"basic_is_head_root",
]
test suiteName & " - " & path.relativeTestPathComponent():
when defined(windows):
# Some test files have very long paths
skip()
else:
if os_ops.splitPath(path).tail in SKIP:
skip()
else:
doRunTest(path, fork)
template fcSuite(suiteName: static[string], testPathElem: static[string]) =
suite "EF - " & suiteName & preset():
const presetPath = SszTestsDir/const_preset
for kind, path in walkDir(presetPath, relative = true, checkDir = true):
let testsPath = presetPath/path/testPathElem
if kind != pcDir or not os_ops.dirExists(testsPath):
continue
if testsPath.contains("/electra/") or testsPath.contains("\\electra\\"):
continue
let fork = forkForPathComponent(path).valueOr:
raiseAssert "Unknown test fork: " & testsPath
for kind, path in walkDir(testsPath, relative = true, checkDir = true):
let basePath = testsPath/path/"pyspec_tests"
if kind != pcDir:
continue
for kind, path in walkDir(basePath, relative = true, checkDir = true):
runTest(suiteName, basePath/path, fork)
from ../../beacon_chain/conf import loadKzgTrustedSetup
discard loadKzgTrustedSetup() # Required for Deneb tests
fcSuite("ForkChoice", "fork_choice")
fcSuite("Sync", "sync")
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