nimbus-eth2/tests/test_attestation_pool.nim

729 lines
27 KiB
Nim

# beacon_chain
# Copyright (c) 2018-2022 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.
{.used.}
import
std/sequtils,
# Status lib
unittest2,
chronicles, chronos,
stew/byteutils,
eth/keys, taskpools,
# Internal
../beacon_chain/gossip_processing/[gossip_validation],
../beacon_chain/fork_choice/[fork_choice_types, fork_choice],
../beacon_chain/consensus_object_pools/[
block_quarantine, blockchain_dag, block_clearance, attestation_pool],
../beacon_chain/spec/datatypes/phase0,
../beacon_chain/spec/[beaconstate, helpers, state_transition, validator],
../beacon_chain/beacon_clock,
# Test utilities
./testutil, ./testdbutil, ./testblockutil
func combine(tgt: var Attestation, src: Attestation) =
## Combine the signature and participation bitfield, with the assumption that
## the same data is being signed - if the signatures overlap, they are not
## combined.
doAssert tgt.data == src.data
# In a BLS aggregate signature, one needs to count how many times a
# particular public key has been added - since we use a single bit per key, we
# can only it once, thus we can never combine signatures that overlap already!
doAssert not tgt.aggregation_bits.overlaps(src.aggregation_bits)
tgt.aggregation_bits.incl(src.aggregation_bits)
var agg {.noinit.}: AggregateSignature
agg.init(tgt.signature.load().get())
agg.aggregate(src.signature.load.get())
tgt.signature = agg.finish().toValidatorSig()
func loadSig(a: Attestation): CookedSig =
a.signature.load.get()
proc pruneAtFinalization(dag: ChainDAGRef, attPool: AttestationPool) =
if dag.needStateCachesAndForkChoicePruning():
dag.pruneStateCachesDAG()
# pool[].prune() # We test logic without attestation pool / fork choice pruning
suite "Attestation pool processing" & preset():
## For now just test that we can compile and execute block processing with
## mock data.
setup:
# Genesis state that results in 6 members per committee
var
validatorMonitor = newClone(ValidatorMonitor.init())
dag = init(
ChainDAGRef, defaultRuntimeConfig, makeTestDB(SLOTS_PER_EPOCH * 6),
validatorMonitor, {})
taskpool = Taskpool.new()
verifier = BatchVerifier(rng: keys.newRng(), taskpool: taskpool)
quarantine = newClone(Quarantine.init())
pool = newClone(AttestationPool.init(dag, quarantine))
state = newClone(dag.headState)
cache = StateCache()
info = ForkedEpochInfo()
# Slot 0 is a finalized slot - won't be making attestations for it..
check:
process_slots(
dag.cfg, state[], getStateField(state[], slot) + 1, cache, info,
{}).isOk()
test "Attestation from different branch" & preset():
# Create two alternate histories with different shufflings
check process_slots(
dag.cfg, state[], (SLOTS_PER_EPOCH - 2).Slot, cache, info, {}).isOk
var state2 = newClone(state[])
const epoch = 3.Epoch
template fillToEpoch(
state: ref ForkedHashedBeaconState, cache: var StateCache) =
while getStateField(state[], slot).epoch <= epoch:
check process_slots(
dag.cfg, state[], getStateField(state[], slot) + 1, cache, info,
{}).isOk
let
parent_root = withState(state[]): forkyState.latest_block_root
attestations = makeFullAttestations(
state[], parent_root, getStateField(state[], slot), cache)
blck = addTestBlock(
state[], cache, attestations = attestations, cfg = dag.cfg)
check dag.addHeadBlock(
verifier, blck.phase0Data, OnPhase0BlockAdded(nil)).isOk
# History 1 contains all odd blocks
state.fillToEpoch(cache)
# History 2 contains all even blocks
var cache2 = StateCache()
check process_slots(
dag.cfg, state2[], getStateField(state2[], slot) + 1, cache2, info,
{}).isOk
state2.fillToEpoch(cache2)
# The shuffling for epoch 3 among both chains should now be different
let
dependent_root1 = withState(state[]): forkyState.attester_dependent_root
dependent_root2 = withState(state2[]): forkyState.attester_dependent_root
check dependent_root1 != dependent_root2
# Fill pool with attestations from both chains
let
cIndex = 0.CommitteeIndex
att1 = block:
let
slot = getStateField(state[], slot)
parent_root = withState(state[]): forkyState.latest_block_root
committee = get_beacon_committee(state[], slot, cIndex, cache)
makeAttestation(state[], parent_root, committee[0], cache)
att2 = block:
let
slot = getStateField(state2[], slot)
parent_root = withState(state2[]): forkyState.latest_block_root
committee = get_beacon_committee(state2[], slot, cIndex, cache2)
makeAttestation(state2[], parent_root, committee[0], cache2)
maxSlot = max(att1.data.slot, att2.data.slot)
# Advance time so attestations become valid
check:
process_slots(
dag.cfg, state[], maxSlot + MIN_ATTESTATION_INCLUSION_DELAY,
cache, info, {}).isOk
process_slots(
dag.cfg, state2[], maxSlot + MIN_ATTESTATION_INCLUSION_DELAY,
cache2, info, {}).isOk
# They should remain valid only within a compatible state
withState(state[]):
check:
check_attestation(forkyState.data, att1, {}, cache).isOk
check_attestation(forkyState.data, att2, {}, cache).isErr
withState(state2[]):
check:
check_attestation(forkyState.data, att1, {}, cache2).isErr
check_attestation(forkyState.data, att2, {}, cache2).isOk
# If signature checks are skipped, state incompatibility is not detected
let flags = {skipBlsValidation}
withState(state[]):
check:
check_attestation(forkyState.data, att1, flags, cache).isOk
check_attestation(forkyState.data, att2, flags, cache).isOk
withState(state2[]):
check:
check_attestation(forkyState.data, att1, flags, cache2).isOk
check_attestation(forkyState.data, att2, flags, cache2).isOk
# An additional compatibility check catches that (used in block production)
withState(state[]):
check:
check_attestation_compatible(dag, forkyState.data, att1).isOk
check_attestation_compatible(dag, forkyState.data, att2).isErr
withState(state2[]):
check:
check_attestation_compatible(dag, forkyState.data, att1).isErr
check_attestation_compatible(dag, forkyState.data, att2).isOk
test "Can add and retrieve simple attestations" & preset():
let
# Create an attestation for slot 1!
bc0 = get_beacon_committee(
state[], getStateField(state[], slot), 0.CommitteeIndex, cache)
attestation = makeAttestation(
state[], state[].latest_block_root, bc0[0], cache)
pool[].addAttestation(
attestation, @[bc0[0]], attestation.loadSig,
attestation.data.slot.start_beacon_time)
check:
# Added attestation, should get it back
toSeq(pool[].attestations(Opt.none(Slot), Opt.none(CommitteeIndex))) ==
@[attestation]
toSeq(pool[].attestations(
Opt.some(attestation.data.slot), Opt.none(CommitteeIndex))) ==
@[attestation]
toSeq(pool[].attestations(
Opt.some(attestation.data.slot), Opt.some(attestation.data.index.CommitteeIndex))) ==
@[attestation]
toSeq(pool[].attestations(Opt.none(Slot), Opt.some(attestation.data.index.CommitteeIndex))) ==
@[attestation]
toSeq(pool[].attestations(Opt.some(
attestation.data.slot + 1), Opt.none(CommitteeIndex))) == []
toSeq(pool[].attestations(
Opt.none(Slot), Opt.some(CommitteeIndex(attestation.data.index + 1)))) == []
process_slots(
defaultRuntimeConfig, state[],
getStateField(state[], slot) + MIN_ATTESTATION_INCLUSION_DELAY, cache,
info, {}).isOk()
let attestations = pool[].getAttestationsForBlock(state[], cache)
check:
attestations.len == 1
pool[].getAggregatedAttestation(1.Slot, 0.CommitteeIndex).isSome()
let
root1 = addTestBlock(
state[], cache, attestations = attestations,
nextSlot = false).phase0Data.root
bc1 = get_beacon_committee(
state[], getStateField(state[], slot), 0.CommitteeIndex, cache)
att1 = makeAttestation(state[], root1, bc1[0], cache)
check:
withState(state[]): forkyState.latest_block_root == root1
process_slots(
defaultRuntimeConfig, state[],
getStateField(state[], slot) + MIN_ATTESTATION_INCLUSION_DELAY, cache,
info, {}).isOk()
withState(state[]): forkyState.latest_block_root == root1
check:
# shouldn't include already-included attestations
pool[].getAttestationsForBlock(state[], cache) == []
pool[].addAttestation(
att1, @[bc1[0]], att1.loadSig, att1.data.slot.start_beacon_time)
check:
# but new ones should go in
pool[].getAttestationsForBlock(state[], cache).len() == 1
let
att2 = makeAttestation(state[], root1, bc1[1], cache)
pool[].addAttestation(
att2, @[bc1[1]], att2.loadSig, att2.data.slot.start_beacon_time)
let
combined = pool[].getAttestationsForBlock(state[], cache)
check:
# New attestations should be combined with old attestations
combined.len() == 1
combined[0].aggregation_bits.countOnes() == 2
pool[].addAttestation(
combined[0], @[bc1[1], bc1[0]], combined[0].loadSig,
combined[0].data.slot.start_beacon_time)
check:
# readding the combined attestation shouldn't have an effect
pool[].getAttestationsForBlock(state[], cache).len() == 1
let
# Someone votes for a different root
att3 = makeAttestation(state[], ZERO_HASH, bc1[2], cache)
pool[].addAttestation(
att3, @[bc1[2]], att3.loadSig, att3.data.slot.start_beacon_time)
check:
# We should now get both attestations for the block, but the aggregate
# should be the one with the most votes
pool[].getAttestationsForBlock(state[], cache).len() == 2
pool[].getAggregatedAttestation(2.Slot, 0.CommitteeIndex).
get().aggregation_bits.countOnes() == 2
pool[].getAggregatedAttestation(2.Slot, hash_tree_root(att2.data)).
get().aggregation_bits.countOnes() == 2
let
# Someone votes for a different root
att4 = makeAttestation(state[], ZERO_HASH, bc1[2], cache)
pool[].addAttestation(
att4, @[bc1[2]], att3.loadSig, att3.data.slot.start_beacon_time)
test "Working with aggregates" & preset():
let
# Create an attestation for slot 1!
bc0 = get_beacon_committee(
state[], getStateField(state[], slot), 0.CommitteeIndex, cache)
var
att0 = makeAttestation(
state[], state[].latest_block_root, bc0[0], cache)
att0x = att0
att1 = makeAttestation(
state[], state[].latest_block_root, bc0[1], cache)
att2 = makeAttestation(
state[], state[].latest_block_root, bc0[2], cache)
att3 = makeAttestation(
state[], state[].latest_block_root, bc0[3], cache)
# Both attestations include member 2 but neither is a subset of the other
att0.combine(att2)
att1.combine(att2)
check:
not pool[].covers(att0.data, att0.aggregation_bits)
pool[].addAttestation(
att0, @[bc0[0], bc0[2]], att0.loadSig, att0.data.slot.start_beacon_time)
pool[].addAttestation(
att1, @[bc0[1], bc0[2]], att1.loadSig, att1.data.slot.start_beacon_time)
check:
process_slots(
defaultRuntimeConfig, state[],
getStateField(state[], slot) + MIN_ATTESTATION_INCLUSION_DELAY, cache,
info, {}).isOk()
check:
pool[].covers(att0.data, att0.aggregation_bits)
pool[].getAttestationsForBlock(state[], cache).len() == 2
# Can get either aggregate here, random!
pool[].getAggregatedAttestation(1.Slot, 0.CommitteeIndex).isSome()
# Add in attestation 3 - both aggregates should now have it added
pool[].addAttestation(
att3, @[bc0[3]], att3.loadSig, att3.data.slot.start_beacon_time)
block:
let attestations = pool[].getAttestationsForBlock(state[], cache)
check:
attestations.len() == 2
attestations[0].aggregation_bits.countOnes() == 3
# Can get either aggregate here, random!
pool[].getAggregatedAttestation(1.Slot, 0.CommitteeIndex).isSome()
# Add in attestation 0 as single - attestation 1 is now a superset of the
# aggregates in the pool, so everything else should be removed
pool[].addAttestation(
att0x, @[bc0[0]], att0x.loadSig, att0x.data.slot.start_beacon_time)
block:
let attestations = pool[].getAttestationsForBlock(state[], cache)
check:
attestations.len() == 1
attestations[0].aggregation_bits.countOnes() == 4
pool[].getAggregatedAttestation(1.Slot, 0.CommitteeIndex).isSome()
test "Everyone voting for something different" & preset():
var attestations: int
for i in 0..<SLOTS_PER_EPOCH:
var root: Eth2Digest
root.data[0..<8] = toBytesBE(i.uint64)
let
bc0 = get_beacon_committee(
state[], getStateField(state[], slot), 0.CommitteeIndex, cache)
for j in 0..<bc0.len():
root.data[8..<16] = toBytesBE(j.uint64)
let att = makeAttestation(state[], root, bc0[j], cache)
pool[].addAttestation(
att, @[bc0[j]], att.loadSig, att.data.slot.start_beacon_time)
inc attestations
check:
process_slots(
defaultRuntimeConfig, state[],
getStateField(state[], slot) + 1, cache, info, {}).isOk()
doAssert attestations.uint64 > MAX_ATTESTATIONS,
"6*SLOTS_PER_EPOCH validators > 128 mainnet MAX_ATTESTATIONS"
check:
# Fill block with attestations
pool[].getAttestationsForBlock(state[], cache).lenu64() ==
MAX_ATTESTATIONS
pool[].getAggregatedAttestation(
getStateField(state[], slot) - 1, 0.CommitteeIndex).isSome()
test "Attestations may arrive in any order" & preset():
var cache = StateCache()
let
# Create an attestation for slot 1!
bc0 = get_beacon_committee(
state[], getStateField(state[], slot), 0.CommitteeIndex, cache)
attestation0 = makeAttestation(
state[], state[].latest_block_root, bc0[0], cache)
check:
process_slots(
defaultRuntimeConfig, state[], getStateField(state[], slot) + 1,
cache, info, {}).isOk()
let
bc1 = get_beacon_committee(state[],
getStateField(state[], slot), 0.CommitteeIndex, cache)
attestation1 = makeAttestation(
state[], state[].latest_block_root, bc1[0], cache)
# test reverse order
pool[].addAttestation(
attestation1, @[bc1[0]], attestation1.loadSig,
attestation1.data.slot.start_beacon_time)
pool[].addAttestation(
attestation0, @[bc0[0]], attestation0.loadSig,
attestation0.data.slot.start_beacon_time)
let attestations = pool[].getAttestationsForBlock(state[], cache)
check:
attestations.len == 1
test "Attestations should be combined" & preset():
var cache = StateCache()
let
# Create an attestation for slot 1!
bc0 = get_beacon_committee(
state[], getStateField(state[], slot), 0.CommitteeIndex, cache)
attestation0 =
makeAttestation(state[], state[].latest_block_root, bc0[0], cache)
attestation1 =
makeAttestation(state[], state[].latest_block_root, bc0[1], cache)
pool[].addAttestation(
attestation0, @[bc0[0]], attestation0.loadSig,
attestation0.data.slot.start_beacon_time)
pool[].addAttestation(
attestation1, @[bc0[1]], attestation1.loadSig,
attestation1.data.slot.start_beacon_time)
check:
process_slots(
defaultRuntimeConfig, state[],
MIN_ATTESTATION_INCLUSION_DELAY.Slot + 1, cache, info, {}).isOk()
let attestations = pool[].getAttestationsForBlock(state[], cache)
check:
attestations.len == 1
test "Attestations may overlap, bigger first" & preset():
var cache = StateCache()
var
# Create an attestation for slot 1!
bc0 = get_beacon_committee(
state[], getStateField(state[], slot), 0.CommitteeIndex, cache)
attestation0 = makeAttestation(
state[], state[].latest_block_root, bc0[0], cache)
attestation1 = makeAttestation(
state[], state[].latest_block_root, bc0[1], cache)
attestation0.combine(attestation1)
pool[].addAttestation(
attestation0, @[bc0[0]], attestation0.loadSig,
attestation0.data.slot.start_beacon_time)
pool[].addAttestation(
attestation1, @[bc0[1]], attestation1.loadSig,
attestation1.data.slot.start_beacon_time)
check:
process_slots(
defaultRuntimeConfig, state[],
MIN_ATTESTATION_INCLUSION_DELAY.Slot + 1, cache, info, {}).isOk()
let attestations = pool[].getAttestationsForBlock(state[], cache)
check:
attestations.len == 1
test "Attestations may overlap, smaller first" & preset():
var cache = StateCache()
var
# Create an attestation for slot 1!
bc0 = get_beacon_committee(state[],
getStateField(state[], slot), 0.CommitteeIndex, cache)
attestation0 = makeAttestation(
state[], state[].latest_block_root, bc0[0], cache)
attestation1 = makeAttestation(
state[], state[].latest_block_root, bc0[1], cache)
attestation0.combine(attestation1)
pool[].addAttestation(
attestation1, @[bc0[1]], attestation1.loadSig,
attestation1.data.slot.start_beacon_time)
pool[].addAttestation(
attestation0, @[bc0[0]], attestation0.loadSig,
attestation0.data.slot.start_beacon_time)
check:
process_slots(
defaultRuntimeConfig, state[],
MIN_ATTESTATION_INCLUSION_DELAY.Slot + 1, cache, info, {}).isOk()
let attestations = pool[].getAttestationsForBlock(state[], cache)
check:
attestations.len == 1
test "Fork choice returns latest block with no attestations":
var cache = StateCache()
let
b1 = addTestBlock(state[], cache).phase0Data
b1Add = dag.addHeadBlock(verifier, b1) do (
blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
epochRef: EpochRef, unrealized: FinalityCheckpoints):
# Callback add to fork choice if valid
pool[].addForkChoice(
epochRef, blckRef, unrealized, signedBlock.message,
blckRef.slot.start_beacon_time)
let head =
pool[].selectOptimisticHead(b1Add[].slot.start_beacon_time).get().blck
check:
head == b1Add[]
let
b2 = addTestBlock(state[], cache).phase0Data
b2Add = dag.addHeadBlock(verifier, b2) do (
blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
epochRef: EpochRef, unrealized: FinalityCheckpoints):
# Callback add to fork choice if valid
pool[].addForkChoice(
epochRef, blckRef, unrealized, signedBlock.message,
blckRef.slot.start_beacon_time)
let head2 =
pool[].selectOptimisticHead(b2Add[].slot.start_beacon_time).get().blck
check:
head2 == b2Add[]
test "Fork choice returns block with attestation":
var cache = StateCache()
let
b10 = makeTestBlock(state[], cache).phase0Data
b10Add = dag.addHeadBlock(verifier, b10) do (
blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
epochRef: EpochRef, unrealized: FinalityCheckpoints):
# Callback add to fork choice if valid
pool[].addForkChoice(
epochRef, blckRef, unrealized, signedBlock.message,
blckRef.slot.start_beacon_time)
let head =
pool[].selectOptimisticHead(b10Add[].slot.start_beacon_time).get().blck
check:
head == b10Add[]
# Add a block too late to be timely enough to be proposer-boosted, which
# would otherwise cause it to be selected as head
let
b11 = makeTestBlock(state[], cache,
graffiti = GraffitiBytes [1'u8, 0, 0, 0 ,0 ,0 ,0 ,0 ,0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
).phase0Data
b11Add = dag.addHeadBlock(verifier, b11) do (
blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
epochRef: EpochRef, unrealized: FinalityCheckpoints):
# Callback add to fork choice if valid
pool[].addForkChoice(
epochRef, blckRef, unrealized, signedBlock.message,
blckRef.slot.start_beacon_time + SECONDS_PER_SLOT.int64.seconds)
bc1 = get_beacon_committee(
state[], getStateField(state[], slot) - 1, 1.CommitteeIndex,
cache)
attestation0 = makeAttestation(state[], b10.root, bc1[0], cache)
pool[].addAttestation(
attestation0, @[bc1[0]], attestation0.loadSig,
attestation0.data.slot.start_beacon_time)
let head2 =
pool[].selectOptimisticHead(b10Add[].slot.start_beacon_time).get().blck
check:
# Single vote for b10 and no votes for b11
head2 == b10Add[]
let
attestation1 = makeAttestation(state[], b11.root, bc1[1], cache)
attestation2 = makeAttestation(state[], b11.root, bc1[2], cache)
pool[].addAttestation(
attestation1, @[bc1[1]], attestation1.loadSig,
attestation1.data.slot.start_beacon_time)
let head3 =
pool[].selectOptimisticHead(b10Add[].slot.start_beacon_time).get().blck
let bigger = if b11.root.data < b10.root.data: b10Add else: b11Add
check:
# Ties broken lexicographically in spec -> ?
head3 == bigger[]
pool[].addAttestation(
attestation2, @[bc1[2]], attestation2.loadSig,
attestation2.data.slot.start_beacon_time)
let head4 =
pool[].selectOptimisticHead(b11Add[].slot.start_beacon_time).get().blck
check:
# Two votes for b11
head4 == b11Add[]
test "Trying to add a block twice tags the second as an error":
var cache = StateCache()
let
b10 = makeTestBlock(state[], cache).phase0Data
b10Add = dag.addHeadBlock(verifier, b10) do (
blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
epochRef: EpochRef, unrealized: FinalityCheckpoints):
# Callback add to fork choice if valid
pool[].addForkChoice(
epochRef, blckRef, unrealized, signedBlock.message,
blckRef.slot.start_beacon_time)
let head =
pool[].selectOptimisticHead(b10Add[].slot.start_beacon_time).get().blck
check:
head == b10Add[]
# -------------------------------------------------------------
# Add back the old block to ensure we have a duplicate error
let b10_clone = b10 # Assumes deep copy
let b10Add_clone = dag.addHeadBlock(verifier, b10_clone) do (
blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
epochRef: EpochRef, unrealized: FinalityCheckpoints):
# Callback add to fork choice if valid
pool[].addForkChoice(
epochRef, blckRef, unrealized, signedBlock.message,
blckRef.slot.start_beacon_time)
doAssert: b10Add_clone.error == VerifierError.Duplicate
test "Trying to add a duplicate block from an old pruned epoch is tagged as an error":
# Note: very sensitive to stack usage
dag.updateFlags.incl {skipBlsValidation}
var cache = StateCache()
let
b10 = addTestBlock(state[], cache).phase0Data
b10Add = dag.addHeadBlock(verifier, b10) do (
blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
epochRef: EpochRef, unrealized: FinalityCheckpoints):
# Callback add to fork choice if valid
pool[].addForkChoice(
epochRef, blckRef, unrealized, signedBlock.message,
blckRef.slot.start_beacon_time)
let head =
pool[].selectOptimisticHead(b10Add[].slot.start_beacon_time).get().blck
doAssert: head == b10Add[]
# -------------------------------------------------------------
let b10_clone = b10 # Assumes deep copy
# -------------------------------------------------------------
# Pass an epoch
var attestations: seq[Attestation]
for epoch in 0 ..< 5:
let start_slot = start_slot(Epoch epoch)
let committees_per_slot =
get_committee_count_per_slot(state[], Epoch epoch, cache)
for slot in start_slot ..< start_slot + SLOTS_PER_EPOCH:
let new_block = addTestBlock(
state[], cache, attestations = attestations).phase0Data
let blockRef = dag.addHeadBlock(verifier, new_block) do (
blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
epochRef: EpochRef, unrealized: FinalityCheckpoints):
# Callback add to fork choice if valid
pool[].addForkChoice(
epochRef, blckRef, unrealized, signedBlock.message,
blckRef.slot.start_beacon_time)
let head =
pool[].selectOptimisticHead(
blockRef[].slot.start_beacon_time).get().blck
doAssert: head == blockRef[]
dag.updateHead(head, quarantine[], [])
pruneAtFinalization(dag, pool[])
attestations.setLen(0)
for committee_index in get_committee_indices(committees_per_slot):
let committee = get_beacon_committee(
state[], getStateField(state[], slot), committee_index,
cache)
# Create a bitfield filled with the given count per attestation,
# exactly on the right-most part of the committee field.
var aggregation_bits = init(CommitteeValidatorsBits, committee.len)
for v in 0 ..< committee.len * 2 div 3 + 1:
aggregation_bits[v] = true
attestations.add Attestation(
aggregation_bits: aggregation_bits,
data: makeAttestationData(state[], getStateField(state[], slot),
committee_index, blockRef.get().root)
# signature: ValidatorSig()
)
cache = StateCache()
# -------------------------------------------------------------
# Prune
doAssert: dag.finalizedHead.slot != 0
pool[].prune()
doAssert: b10.root notin pool.forkChoice.backend
# Add back the old block to ensure we have a duplicate error
let b10Add_clone = dag.addHeadBlock(verifier, b10_clone) do (
blckRef: BlockRef, signedBlock: phase0.TrustedSignedBeaconBlock,
epochRef: EpochRef, unrealized: FinalityCheckpoints):
# Callback add to fork choice if valid
pool[].addForkChoice(
epochRef, blckRef, unrealized, signedBlock.message,
blckRef.slot.start_beacon_time)
doAssert: b10Add_clone.error == VerifierError.Duplicate