nimbus-eth2/tests/testblockutil.nim

558 lines
20 KiB
Nim

# 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.
import
chronicles,
stew/endians2,
../beacon_chain/consensus_object_pools/sync_committee_msg_pool,
../beacon_chain/spec/datatypes/bellatrix,
../beacon_chain/spec/[
beaconstate, helpers, keystore, signatures, state_transition, validator]
# TODO remove this dependency
from std/random import rand
from eth/common/eth_types_rlp import rlpHash
type
MockPrivKeysT = object
MockPubKeysT = object
const
MockPrivKeys* = MockPrivKeysT()
MockPubKeys* = MockPubKeysT()
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/tests/core/pyspec/eth2spec/test/helpers/keys.py
func `[]`*(sk: MockPrivKeysT, index: ValidatorIndex|uint64): ValidatorPrivKey =
var bytes = (index.uint64 + 1'u64).toBytesLE() # Consistent with EF tests
static: doAssert sizeof(bytes) <= sizeof(result)
copyMem(addr result, addr bytes, sizeof(bytes))
proc `[]`*(pk: MockPubKeysT, index: uint64): ValidatorPubKey =
var cache {.threadvar.}: Table[uint64, ValidatorPubKey]
cache.withValue(index, key) do:
return key[]
do:
let key = MockPrivKeys[index].toPubKey().toPubKey()
cache[index] = key
return key
proc `[]`*(pk: MockPubKeysT, index: ValidatorIndex): ValidatorPubKey =
pk[index.uint64]
func makeFakeHash*(i: int): Eth2Digest =
var bytes = uint64(i).toBytesLE()
static: doAssert sizeof(bytes) <= sizeof(result.data)
copyMem(addr result.data[0], addr bytes[0], sizeof(bytes))
proc makeDeposit*(
i: int,
flags: UpdateFlags = {},
cfg = defaultRuntimeConfig): DepositData =
let
privkey = MockPrivKeys[i.ValidatorIndex]
pubkey = MockPubKeys[i.ValidatorIndex]
withdrawal_credentials = makeWithdrawalCredentials(pubkey)
result = DepositData(
pubkey: pubkey,
withdrawal_credentials: withdrawal_credentials,
amount: MAX_EFFECTIVE_BALANCE)
if skipBlsValidation notin flags:
result.signature = get_deposit_signature(cfg, result, privkey).toValidatorSig()
proc makeInitialDeposits*(
n = SLOTS_PER_EPOCH, flags: UpdateFlags = {}, cfg = defaultRuntimeConfig): seq[DepositData] =
for i in 0..<n.int:
result.add makeDeposit(i, flags, cfg = cfg)
func signBlock(
fork: Fork, genesis_validators_root: Eth2Digest, forked: ForkedBeaconBlock,
privKey: ValidatorPrivKey, flags: UpdateFlags = {}): ForkedSignedBeaconBlock =
let
slot = withBlck(forked): forkyBlck.slot
root = hash_tree_root(forked)
signature =
if skipBlsValidation notin flags:
get_block_signature(
fork, genesis_validators_root, slot, root, privKey).toValidatorSig()
else:
ValidatorSig()
ForkedSignedBeaconBlock.init(forked, root, signature)
from eth/eip1559 import EIP1559_INITIAL_BASE_FEE, calcEip1599BaseFee
from eth/common/eth_types import EMPTY_ROOT_HASH, GasInt
proc build_empty_merge_execution_payload(state: bellatrix.BeaconState):
bellatrix.ExecutionPayloadForSigning =
## Assuming a pre-state of the same slot, build a valid ExecutionPayload
## without any transactions from a non-merged block.
doAssert not is_merge_transition_complete(state)
let
latest = state.latest_execution_payload_header
timestamp = compute_timestamp_at_slot(state, state.slot)
randao_mix = get_randao_mix(state, get_current_epoch(state))
var payload = bellatrix.ExecutionPayload(
parent_hash: latest.block_hash,
state_root: latest.state_root, # no changes to the state
receipts_root: EMPTY_ROOT_HASH,
block_number: latest.block_number + 1,
prev_randao: randao_mix,
gas_limit: 30000000, # retain same limit
gas_used: 0, # empty block, 0 gas
timestamp: timestamp,
base_fee_per_gas: EIP1559_INITIAL_BASE_FEE)
payload.block_hash = rlpHash blockToBlockHeader(bellatrix.BeaconBlock(body:
bellatrix.BeaconBlockBody(execution_payload: payload)))
bellatrix.ExecutionPayloadForSigning(executionPayload: payload,
blockValue: Wei.zero)
from stew/saturating_arith import saturate
proc build_empty_execution_payload(
state: bellatrix.BeaconState,
feeRecipient: Eth1Address): bellatrix.ExecutionPayloadForSigning =
## Assuming a pre-state of the same slot, build a valid ExecutionPayload
## without any transactions.
let
latest = state.latest_execution_payload_header
timestamp = compute_timestamp_at_slot(state, state.slot)
randao_mix = get_randao_mix(state, get_current_epoch(state))
base_fee = calcEip1599BaseFee(GasInt.saturate latest.gas_limit,
GasInt.saturate latest.gas_used,
latest.base_fee_per_gas)
var payload = bellatrix.ExecutionPayloadForSigning(
executionPayload: bellatrix.ExecutionPayload(
parent_hash: latest.block_hash,
fee_recipient: bellatrix.ExecutionAddress(data: distinctBase(feeRecipient)),
state_root: latest.state_root, # no changes to the state
receipts_root: EMPTY_ROOT_HASH,
block_number: latest.block_number + 1,
prev_randao: randao_mix,
gas_limit: latest.gas_limit, # retain same limit
gas_used: 0, # empty block, 0 gas
timestamp: timestamp,
base_fee_per_gas: base_fee),
blockValue: Wei.zero)
payload.executionPayload.block_hash =
bellatrix.BeaconBlock(body: bellatrix.BeaconBlockBody(execution_payload:
payload.executionPayload)).compute_execution_block_hash()
payload
proc addTestBlock*(
state: var ForkedHashedBeaconState,
cache: var StateCache,
eth1_data: Eth1Data = Eth1Data(),
attestations: seq[Attestation] = newSeq[Attestation](),
deposits: seq[Deposit] = newSeq[Deposit](),
sync_aggregate: SyncAggregate = SyncAggregate.init(),
graffiti: GraffitiBytes = default(GraffitiBytes),
flags: set[UpdateFlag] = {},
nextSlot: bool = true,
cfg: RuntimeConfig = defaultRuntimeConfig): ForkedSignedBeaconBlock =
# Create and add a block to state - state will advance by one slot!
if nextSlot:
var info = ForkedEpochInfo()
process_slots(
cfg, state, getStateField(state, slot) + 1, cache, info, flags).expect(
"can advance 1")
let
proposer_index = get_beacon_proposer_index(
state, cache, getStateField(state, slot)).expect("valid proposer index")
privKey = MockPrivKeys[proposer_index]
randao_reveal =
if skipBlsValidation notin flags:
get_epoch_signature(
getStateField(state, fork),
getStateField(state, genesis_validators_root),
getStateField(state, slot).epoch, privKey).toValidatorSig()
else:
ValidatorSig()
let message = withState(state):
let execution_payload =
when consensusFork > ConsensusFork.Bellatrix:
default(consensusFork.ExecutionPayloadForSigning)
elif consensusFork == ConsensusFork.Bellatrix:
if cfg.CAPELLA_FORK_EPOCH != FAR_FUTURE_EPOCH:
# Can't keep correctly doing this once Capella happens, but LVH search
# test relies on merging. So, merge only if no Capella transition.
default(bellatrix.ExecutionPayloadForSigning)
else:
# Merge shortly after Bellatrix
if forkyState.data.slot >
cfg.BELLATRIX_FORK_EPOCH * SLOTS_PER_EPOCH + 10:
if is_merge_transition_complete(forkyState.data):
const feeRecipient = default(Eth1Address)
build_empty_execution_payload(forkyState.data, feeRecipient)
else:
build_empty_merge_execution_payload(forkyState.data)
else:
default(bellatrix.ExecutionPayloadForSigning)
else:
default(bellatrix.ExecutionPayloadForSigning)
makeBeaconBlock(
cfg,
state,
proposer_index,
randao_reveal,
# Keep deposit counts internally consistent.
Eth1Data(
deposit_root: eth1_data.deposit_root,
deposit_count: forkyState.data.eth1_deposit_index + deposits.lenu64,
block_hash: eth1_data.block_hash),
graffiti,
attestations,
deposits,
BeaconBlockValidatorChanges(),
sync_aggregate,
execution_payload,
noRollback,
cache,
verificationFlags = {skipBlsValidation})
if message.isErr:
raiseAssert "Failed to create a block: " & $message.error
let
new_block = signBlock(
getStateField(state, fork),
getStateField(state, genesis_validators_root), message.get(), privKey,
flags)
new_block
proc makeTestBlock*(
state: ForkedHashedBeaconState,
cache: var StateCache,
eth1_data = Eth1Data(),
attestations = newSeq[Attestation](),
deposits = newSeq[Deposit](),
sync_aggregate = SyncAggregate.init(),
graffiti = default(GraffitiBytes),
cfg = defaultRuntimeConfig): ForkedSignedBeaconBlock =
# Create a block for `state.slot + 1` - like a block proposer would do!
# It's a bit awkward - in order to produce a block for N+1, we need to
# calculate what the state will look like after that block has been applied,
# because the block includes the state root.
let tmpState = assignClone(state)
addTestBlock(
tmpState[], cache, eth1_data,
attestations, deposits, sync_aggregate, graffiti, cfg = cfg)
func makeAttestationData*(
state: ForkyBeaconState, slot: Slot, committee_index: CommitteeIndex,
beacon_block_root: Eth2Digest): AttestationData =
let
current_epoch = get_current_epoch(state)
start_slot = start_slot(current_epoch)
epoch_boundary_block_root =
if start_slot == state.slot: beacon_block_root
else: get_block_root_at_slot(state, start_slot)
doAssert slot.epoch == current_epoch,
"Computed epoch was " & $slot.epoch &
" while the state current_epoch was " & $current_epoch
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/validator.md#attestation-data
AttestationData(
slot: slot,
index: committee_index.uint64,
beacon_block_root: beacon_block_root,
source: state.current_justified_checkpoint,
target: Checkpoint(
epoch: current_epoch,
root: epoch_boundary_block_root
)
)
func makeAttestationSig(
fork: Fork, genesis_validators_root: Eth2Digest, data: AttestationData,
committee: openArray[ValidatorIndex],
bits: CommitteeValidatorsBits): ValidatorSig =
let signing_root = compute_attestation_signing_root(
fork, genesis_validators_root, data)
var
agg {.noinit.}: AggregateSignature
first = true
for i in 0..<bits.len():
if not bits[i]: continue
let sig = blsSign(MockPrivKeys[committee[i]], signing_root.data)
if first:
agg.init(sig)
first = false
else:
agg.aggregate(sig)
if first:
ValidatorSig.infinity()
else:
agg.finish().toValidatorSig()
func makeAttestationData*(
state: ForkedHashedBeaconState, slot: Slot, committee_index: CommitteeIndex,
beacon_block_root: Eth2Digest): AttestationData =
## Create an attestation / vote for the block `beacon_block_root` using the
## data in `state` to fill in the rest of the fields.
## `state` is the state corresponding to the `beacon_block_root` advanced to
## the slot we're attesting to.
withState(state):
makeAttestationData(
forkyState.data, slot, committee_index, beacon_block_root)
func makeAttestation(
state: ForkedHashedBeaconState, beacon_block_root: Eth2Digest,
committee: seq[ValidatorIndex], slot: Slot, committee_index: CommitteeIndex,
validator_index: ValidatorIndex, cache: var StateCache,
flags: UpdateFlags = {}): Attestation =
let
index_in_committee = committee.find(validator_index)
data = makeAttestationData(state, slot, committee_index, beacon_block_root)
doAssert index_in_committee != -1, "find_beacon_committee should guarantee this"
var aggregation_bits = CommitteeValidatorsBits.init(committee.len)
aggregation_bits.setBit index_in_committee
let sig = if skipBlsValidation in flags:
ValidatorSig()
else:
makeAttestationSig(
getStateField(state, fork),
getStateField(state, genesis_validators_root),
data, committee, aggregation_bits)
Attestation(
data: data,
aggregation_bits: aggregation_bits,
signature: sig
)
func find_beacon_committee(
state: ForkedHashedBeaconState, validator_index: ValidatorIndex,
cache: var StateCache): auto =
let epoch = epoch(getStateField(state, slot))
for epoch_committee_index in 0'u64 ..< get_committee_count_per_slot(
state, epoch, cache) * SLOTS_PER_EPOCH:
let
slot = ((epoch_committee_index mod SLOTS_PER_EPOCH) +
epoch.start_slot.uint64).Slot
index = CommitteeIndex(epoch_committee_index div SLOTS_PER_EPOCH)
committee = get_beacon_committee(state, slot, index, cache)
if validator_index in committee:
return (committee, slot, index)
doAssert false
func makeAttestation*(
state: ForkedHashedBeaconState, beacon_block_root: Eth2Digest,
validator_index: ValidatorIndex, cache: var StateCache): Attestation =
let (committee, slot, index) =
find_beacon_committee(state, validator_index, cache)
makeAttestation(state, beacon_block_root, committee, slot, index,
validator_index, cache)
func makeFullAttestations*(
state: ForkedHashedBeaconState, beacon_block_root: Eth2Digest, slot: Slot,
cache: var StateCache,
flags: UpdateFlags = {}): seq[Attestation] =
# Create attestations in which the full committee participates for each shard
# that should be attested to during a particular slot
let committees_per_slot = get_committee_count_per_slot(
state, slot.epoch, cache)
for committee_index in get_committee_indices(committees_per_slot):
let
committee = get_beacon_committee(state, slot, committee_index, cache)
data = makeAttestationData(state, slot, committee_index, beacon_block_root)
doAssert committee.len() >= 1
var attestation = Attestation(
aggregation_bits: CommitteeValidatorsBits.init(committee.len),
data: data)
for i in 0..<committee.len:
attestation.aggregation_bits.setBit(i)
attestation.signature = makeAttestationSig(
getStateField(state, fork),
getStateField(state, genesis_validators_root), data, committee,
attestation.aggregation_bits)
result.add attestation
proc makeSyncAggregate(
state: ForkedHashedBeaconState,
syncCommitteeRatio: float,
cfg: RuntimeConfig): SyncAggregate =
if syncCommitteeRatio <= 0.0:
return SyncAggregate.init()
let
syncCommittee =
withState(state):
when consensusFork >= ConsensusFork.Altair:
if (forkyState.data.slot + 1).is_sync_committee_period():
forkyState.data.next_sync_committee
else:
forkyState.data.current_sync_committee
else:
return SyncAggregate.init()
fork =
getStateField(state, fork)
genesis_validators_root =
getStateField(state, genesis_validators_root)
slot =
getStateField(state, slot)
latest_block_id =
withState(state): forkyState.latest_block_id
rng = HmacDrbgContext.new()
syncCommitteePool = newClone(SyncCommitteeMsgPool.init(rng, cfg))
type
Aggregator = object
subcommitteeIdx: SyncSubcommitteeIndex
validatorIdx: ValidatorIndex
selectionProof: ValidatorSig
let
minActiveParticipants =
if syncCommitteeRatio >= 2.0 / 3: # Ensure supermajority is hit
(SYNC_COMMITTEE_SIZE * 2 + 2) div 3
else:
0
maxActiveParticipants = (syncCommitteeRatio * SYNC_COMMITTEE_SIZE).int
var
aggregators: seq[Aggregator]
numActiveParticipants = 0
for subcommitteeIdx in SyncSubcommitteeIndex:
let
firstKeyIdx = subcommitteeIdx.int * SYNC_SUBCOMMITTEE_SIZE
lastKeyIdx = firstKeyIdx + SYNC_SUBCOMMITTEE_SIZE - 1
var processedKeys = initHashSet[ValidatorPubKey]()
for idx, validatorKey in syncCommittee.pubkeys[firstKeyIdx .. lastKeyIdx]:
if validatorKey in processedKeys:
continue
processedKeys.incl validatorKey
let
validatorIdx =
block:
var res = 0
for i, validator in getStateField(state, validators):
if validator.pubkey == validatorKey:
res = i
break
res.ValidatorIndex
selectionProofSig = get_sync_committee_selection_proof(
fork, genesis_validators_root,
slot, subcommitteeIdx,
MockPrivKeys[validatorIdx])
if is_sync_committee_aggregator(selectionProofSig.toValidatorSig):
aggregators.add Aggregator(
subcommitteeIdx: subcommitteeIdx,
validatorIdx: validatorIdx,
selectionProof: selectionProofSig.toValidatorSig)
if numActiveParticipants >= minActiveParticipants and
rand(1.0) > syncCommitteeRatio:
continue
var positions: seq[uint64]
for pos, key in syncCommittee.pubkeys[firstKeyIdx + idx .. lastKeyIdx]:
if numActiveParticipants >= maxActiveParticipants:
break
if key == validatorKey:
positions.add (idx + pos).uint64
inc numActiveParticipants
if positions.len == 0:
continue
let signature = get_sync_committee_message_signature(
fork, genesis_validators_root,
slot, latest_block_id.root,
MockPrivKeys[validatorIdx])
syncCommitteePool[].addSyncCommitteeMessage(
slot,
latest_block_id,
uint64 validatorIdx,
signature,
subcommitteeIdx,
positions)
for aggregator in aggregators:
var contribution: SyncCommitteeContribution
if syncCommitteePool[].produceContribution(
slot, latest_block_id, aggregator.subcommitteeIdx, contribution):
let
contributionAndProof = ContributionAndProof(
aggregator_index: uint64 aggregator.validatorIdx,
contribution: contribution,
selection_proof: aggregator.selectionProof)
contributionSig = get_contribution_and_proof_signature(
fork, genesis_validators_root,
contributionAndProof,
MockPrivKeys[aggregator.validatorIdx])
signedContributionAndProof = SignedContributionAndProof(
message: contributionAndProof,
signature: contributionSig.toValidatorSig)
syncCommitteePool[].addContribution(
signedContributionAndProof,
latest_block_id, contribution.signature.load.get)
syncCommitteePool[].produceSyncAggregate(latest_block_id, slot + 1)
iterator makeTestBlocks*(
state: ForkedHashedBeaconState,
cache: var StateCache,
blocks: int,
eth1_data = Eth1Data(),
attested = false,
allDeposits = newSeq[Deposit](),
syncCommitteeRatio = 0.0,
graffiti = default(GraffitiBytes),
cfg = defaultRuntimeConfig): ForkedSignedBeaconBlock =
var state = assignClone(state)
for _ in 0..<blocks:
let
parent_root = withState(state[]): forkyState.latest_block_root
attestations =
if attested:
makeFullAttestations(
state[], parent_root, getStateField(state[], slot), cache)
else:
@[]
stateEth1 = getStateField(state[], eth1_data)
stateDepositIndex = getStateField(state[], eth1_deposit_index)
deposits =
if stateDepositIndex < stateEth1.deposit_count:
let
lowIndex = stateDepositIndex
numDeposits = min(MAX_DEPOSITS, stateEth1.deposit_count - lowIndex)
highIndex = lowIndex + numDeposits - 1
allDeposits[lowIndex .. highIndex]
else:
newSeq[Deposit]()
sync_aggregate = makeSyncAggregate(state[], syncCommitteeRatio, cfg)
yield addTestBlock(
state[], cache,
eth1_data = eth1_data,
attestations = attestations,
deposits = deposits,
sync_aggregate = sync_aggregate,
graffiti = graffiti,
cfg = cfg)