nimbus-eth2/beacon_chain/spec/state_transition_epoch.nim

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# beacon_chain
# Copyright (c) 2018-2024 Status Research & Development GmbH
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# 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).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
{.push raises: [].}
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# State transition - epoch processing, as described in
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#epoch-processing
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#epoch-processing
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/bellatrix/beacon-chain.md#epoch-processing
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/capella/beacon-chain.md#epoch-processing
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#
# The entry point is `process_epoch`, which is at the bottom of this file.
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#
# General notes about the code:
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# * Weird styling - the sections taken from the spec use python styling while
# the others use NEP-1 - helps grepping identifiers in spec
# * When updating the code, add TODO sections to mark where there are clear
# improvements to be made - other than that, keep things similar to spec unless
# motivated by security or performance considerations
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import
stew/assign2, chronicles,
../extras,
"."/[beaconstate, eth2_merkleization, validator]
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from std/math import sum, `^`
from stew/bitops2 import setBit
from ./datatypes/capella import
BeaconState, HistoricalSummary, Withdrawal, WithdrawalIndex
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export extras, phase0, altair
# Logging utilities
# --------------------------------------------------------
logScope: topics = "consens"
# Accessors that implement the max condition in `get_total_balance`:
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#get_total_balance
template current_epoch*(v: TotalBalances): Gwei =
max(EFFECTIVE_BALANCE_INCREMENT, v.current_epoch_raw)
template previous_epoch*(v: TotalBalances): Gwei =
max(EFFECTIVE_BALANCE_INCREMENT, v.previous_epoch_raw)
template current_epoch_attesters*(v: TotalBalances): Gwei =
max(EFFECTIVE_BALANCE_INCREMENT, v.current_epoch_attesters_raw)
template current_epoch_target_attesters*(v: TotalBalances): Gwei =
max(EFFECTIVE_BALANCE_INCREMENT, v.current_epoch_target_attesters_raw)
template previous_epoch_attesters*(v: TotalBalances): Gwei =
max(EFFECTIVE_BALANCE_INCREMENT, v.previous_epoch_attesters_raw)
template previous_epoch_target_attesters*(v: TotalBalances): Gwei =
max(EFFECTIVE_BALANCE_INCREMENT, v.previous_epoch_target_attesters_raw)
template previous_epoch_head_attesters*(v: TotalBalances): Gwei =
max(EFFECTIVE_BALANCE_INCREMENT, v.previous_epoch_head_attesters_raw)
func init*(info: var phase0.EpochInfo, state: phase0.BeaconState) =
info.balances = TotalBalances()
info.validators.setLen(state.validators.len)
performance fixes (#2259) * performance fixes * don't mark tree cache as dirty on read-only List accesses * store only blob in memory for keys and signatures, parse blob lazily * compare public keys by blob instead of parsing / converting to raw * compare Eth2Digest using non-constant-time comparison * avoid some unnecessary validator copying This branch will in particular speed up deposit processing which has been slowing down block replay. Pre (mainnet, 1600 blocks): ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3450.269, 0.000, 3450.269, 3450.269, 1, Initialize DB 0.417, 0.822, 0.036, 21.098, 1400, Load block from database 16.521, 0.000, 16.521, 16.521, 1, Load state from database 27.906, 50.846, 8.104, 1507.633, 1350, Apply block 52.617, 37.029, 20.640, 135.938, 50, Apply epoch block ``` Post: ``` 3502.715, 0.000, 3502.715, 3502.715, 1, Initialize DB 0.080, 0.560, 0.035, 21.015, 1400, Load block from database 17.595, 0.000, 17.595, 17.595, 1, Load state from database 15.706, 11.028, 8.300, 107.537, 1350, Apply block 33.217, 12.622, 17.331, 60.580, 50, Apply epoch block ``` * more perf fixes * load EpochRef cache into StateCache more aggressively * point out security concern with public key cache * reuse proposer index from state when processing block * avoid genericAssign in a few more places * don't parse key when signature is unparseable * fix `==` overload for Eth2Digest * preallocate validator list when getting active validators * speed up proposer index calculation a little bit * reuse cache when replaying blocks in ncli_db * avoid a few more copying loops ``` Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3279.158, 0.000, 3279.158, 3279.158, 1, Initialize DB 0.072, 0.357, 0.035, 13.400, 1400, Load block from database 17.295, 0.000, 17.295, 17.295, 1, Load state from database 5.918, 9.896, 0.198, 98.028, 1350, Apply block 15.888, 10.951, 7.902, 39.535, 50, Apply epoch block 0.000, 0.000, 0.000, 0.000, 0, Database block store ``` * clear full balance cache before processing rewards and penalties ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3947.901, 0.000, 3947.901, 3947.901, 1, Initialize DB 0.124, 0.506, 0.026, 202.370, 363345, Load block from database 97.614, 0.000, 97.614, 97.614, 1, Load state from database 0.186, 0.188, 0.012, 99.561, 357262, Advance slot, non-epoch 14.161, 5.966, 1.099, 395.511, 11524, Advance slot, epoch 1.372, 4.170, 0.017, 276.401, 363345, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database block store ```
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for i in 0..<state.validators.len:
let v = unsafeAddr state.validators[i]
var flags: set[RewardFlags]
if v[].slashed:
flags.incl(RewardFlags.isSlashed)
if state.get_current_epoch() >= v[].withdrawable_epoch:
flags.incl RewardFlags.canWithdrawInCurrentEpoch
performance fixes (#2259) * performance fixes * don't mark tree cache as dirty on read-only List accesses * store only blob in memory for keys and signatures, parse blob lazily * compare public keys by blob instead of parsing / converting to raw * compare Eth2Digest using non-constant-time comparison * avoid some unnecessary validator copying This branch will in particular speed up deposit processing which has been slowing down block replay. Pre (mainnet, 1600 blocks): ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3450.269, 0.000, 3450.269, 3450.269, 1, Initialize DB 0.417, 0.822, 0.036, 21.098, 1400, Load block from database 16.521, 0.000, 16.521, 16.521, 1, Load state from database 27.906, 50.846, 8.104, 1507.633, 1350, Apply block 52.617, 37.029, 20.640, 135.938, 50, Apply epoch block ``` Post: ``` 3502.715, 0.000, 3502.715, 3502.715, 1, Initialize DB 0.080, 0.560, 0.035, 21.015, 1400, Load block from database 17.595, 0.000, 17.595, 17.595, 1, Load state from database 15.706, 11.028, 8.300, 107.537, 1350, Apply block 33.217, 12.622, 17.331, 60.580, 50, Apply epoch block ``` * more perf fixes * load EpochRef cache into StateCache more aggressively * point out security concern with public key cache * reuse proposer index from state when processing block * avoid genericAssign in a few more places * don't parse key when signature is unparseable * fix `==` overload for Eth2Digest * preallocate validator list when getting active validators * speed up proposer index calculation a little bit * reuse cache when replaying blocks in ncli_db * avoid a few more copying loops ``` Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3279.158, 0.000, 3279.158, 3279.158, 1, Initialize DB 0.072, 0.357, 0.035, 13.400, 1400, Load block from database 17.295, 0.000, 17.295, 17.295, 1, Load state from database 5.918, 9.896, 0.198, 98.028, 1350, Apply block 15.888, 10.951, 7.902, 39.535, 50, Apply epoch block 0.000, 0.000, 0.000, 0.000, 0, Database block store ``` * clear full balance cache before processing rewards and penalties ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3947.901, 0.000, 3947.901, 3947.901, 1, Initialize DB 0.124, 0.506, 0.026, 202.370, 363345, Load block from database 97.614, 0.000, 97.614, 97.614, 1, Load state from database 0.186, 0.188, 0.012, 99.561, 357262, Advance slot, non-epoch 14.161, 5.966, 1.099, 395.511, 11524, Advance slot, epoch 1.372, 4.170, 0.017, 276.401, 363345, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database block store ```
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if v[].is_active_validator(state.get_current_epoch()):
info.balances.current_epoch_raw += v[].effective_balance
performance fixes (#2259) * performance fixes * don't mark tree cache as dirty on read-only List accesses * store only blob in memory for keys and signatures, parse blob lazily * compare public keys by blob instead of parsing / converting to raw * compare Eth2Digest using non-constant-time comparison * avoid some unnecessary validator copying This branch will in particular speed up deposit processing which has been slowing down block replay. Pre (mainnet, 1600 blocks): ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3450.269, 0.000, 3450.269, 3450.269, 1, Initialize DB 0.417, 0.822, 0.036, 21.098, 1400, Load block from database 16.521, 0.000, 16.521, 16.521, 1, Load state from database 27.906, 50.846, 8.104, 1507.633, 1350, Apply block 52.617, 37.029, 20.640, 135.938, 50, Apply epoch block ``` Post: ``` 3502.715, 0.000, 3502.715, 3502.715, 1, Initialize DB 0.080, 0.560, 0.035, 21.015, 1400, Load block from database 17.595, 0.000, 17.595, 17.595, 1, Load state from database 15.706, 11.028, 8.300, 107.537, 1350, Apply block 33.217, 12.622, 17.331, 60.580, 50, Apply epoch block ``` * more perf fixes * load EpochRef cache into StateCache more aggressively * point out security concern with public key cache * reuse proposer index from state when processing block * avoid genericAssign in a few more places * don't parse key when signature is unparseable * fix `==` overload for Eth2Digest * preallocate validator list when getting active validators * speed up proposer index calculation a little bit * reuse cache when replaying blocks in ncli_db * avoid a few more copying loops ``` Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3279.158, 0.000, 3279.158, 3279.158, 1, Initialize DB 0.072, 0.357, 0.035, 13.400, 1400, Load block from database 17.295, 0.000, 17.295, 17.295, 1, Load state from database 5.918, 9.896, 0.198, 98.028, 1350, Apply block 15.888, 10.951, 7.902, 39.535, 50, Apply epoch block 0.000, 0.000, 0.000, 0.000, 0, Database block store ``` * clear full balance cache before processing rewards and penalties ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3947.901, 0.000, 3947.901, 3947.901, 1, Initialize DB 0.124, 0.506, 0.026, 202.370, 363345, Load block from database 97.614, 0.000, 97.614, 97.614, 1, Load state from database 0.186, 0.188, 0.012, 99.561, 357262, Advance slot, non-epoch 14.161, 5.966, 1.099, 395.511, 11524, Advance slot, epoch 1.372, 4.170, 0.017, 276.401, 363345, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database block store ```
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if v[].is_active_validator(state.get_previous_epoch()):
flags.incl RewardFlags.isActiveInPreviousEpoch
info.balances.previous_epoch_raw += v[].effective_balance
info.validators[i] = RewardStatus(
current_epoch_effective_balance: v[].effective_balance,
flags: flags,
)
func add(a: var RewardDelta, b: RewardDelta) =
a.rewards += b.rewards
a.penalties += b.penalties
func process_attestation(
info: var phase0.EpochInfo, state: phase0.BeaconState, a: PendingAttestation,
cache: var StateCache) =
# Collect information about the attestation
var
flags: set[RewardFlags]
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is_previous_epoch_attester: Opt[InclusionInfo]
if a.data.target.epoch == state.get_current_epoch():
flags.incl RewardFlags.isCurrentEpochAttester
if a.data.target.root == get_block_root(state, state.get_current_epoch()):
flags.incl RewardFlags.isCurrentEpochTargetAttester
elif a.data.target.epoch == state.get_previous_epoch():
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is_previous_epoch_attester = Opt.some(InclusionInfo(
delay: a.inclusion_delay,
proposer_index: a.proposer_index,
))
if a.data.target.root == get_block_root(state, state.get_previous_epoch()):
flags.incl RewardFlags.isPreviousEpochTargetAttester
if a.data.beacon_block_root == get_block_root_at_slot(state, a.data.slot):
flags.incl RewardFlags.isPreviousEpochHeadAttester
# Update the cache for all participants
for validator_index in get_attesting_indices_iter(
state, a.data, a.aggregation_bits, cache):
template v(): untyped = info.validators[validator_index]
v.flags = v.flags + flags
if is_previous_epoch_attester.isSome:
if v.is_previous_epoch_attester.isSome:
if is_previous_epoch_attester.get().delay <
v.is_previous_epoch_attester.get().delay:
v.is_previous_epoch_attester = is_previous_epoch_attester
else:
v.is_previous_epoch_attester = is_previous_epoch_attester
func process_attestations*(
info: var phase0.EpochInfo, state: phase0.BeaconState, cache: var StateCache) =
# Walk state attestations and update the status information
for a in state.previous_epoch_attestations:
process_attestation(info, state, a, cache)
for a in state.current_epoch_attestations:
process_attestation(info, state, a, cache)
for idx, v in info.validators:
if v.flags.contains RewardFlags.isSlashed:
continue
let validator_balance = state.validators[idx].effective_balance
if v.flags.contains RewardFlags.isCurrentEpochAttester:
info.balances.current_epoch_attesters_raw += validator_balance
if v.flags.contains RewardFlags.isCurrentEpochTargetAttester:
info.balances.current_epoch_target_attesters_raw += validator_balance
if v.is_previous_epoch_attester.isSome():
info.balances.previous_epoch_attesters_raw += validator_balance
if v.flags.contains RewardFlags.isPreviousEpochTargetAttester:
info.balances.previous_epoch_target_attesters_raw += validator_balance
if v.flags.contains RewardFlags.isPreviousEpochHeadAttester:
info.balances.previous_epoch_head_attesters_raw += validator_balance
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#helpers
# get_eligible_validator_indices
func is_eligible_validator*(validator: RewardStatus): bool =
validator.flags.contains(RewardFlags.isActiveInPreviousEpoch) or
(validator.flags.contains(RewardFlags.isSlashed) and not
(validator.flags.contains RewardFlags.canWithdrawInCurrentEpoch))
func is_eligible_validator*(validator: Validator, previous_epoch: Epoch): bool =
is_active_validator(validator, previous_epoch) or
(validator.slashed and previous_epoch + 1 < validator.withdrawable_epoch)
func is_eligible_validator*(validator: ParticipationInfo): bool =
validator.flags.contains(ParticipationFlag.eligible)
# Spec
# --------------------------------------------------------
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from ./datatypes/deneb import BeaconState
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#get_unslashed_participating_indices
func get_unslashed_participating_balances*(
state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
deneb.BeaconState | electra.BeaconState):
UnslashedParticipatingBalances =
let
previous_epoch = get_previous_epoch(state)
current_epoch = get_current_epoch(state)
var res: UnslashedParticipatingBalances
for validator_index in 0'u64 ..< state.validators.lenu64:
let
is_active_current_epoch = is_active_validator(
state.validators[validator_index], current_epoch)
validator_effective_balance =
state.validators[validator_index].effective_balance
if is_active_current_epoch:
# Active balance counted also for slashed validators
res.current_epoch += validator_effective_balance
if state.validators[validator_index].slashed:
continue
let
is_active_previous_epoch = is_active_validator(
state.validators[validator_index], previous_epoch)
previous_epoch_participation =
state.previous_epoch_participation[validator_index]
if is_active_previous_epoch:
for flag_index in TimelyFlag:
if has_flag(previous_epoch_participation, flag_index):
res.previous_epoch[flag_index] += validator_effective_balance
# Only TIMELY_TARGET_FLAG_INDEX is used with the current epoch in Altair
# and merge
if is_active_current_epoch and has_flag(
state.current_epoch_participation[validator_index],
TIMELY_TARGET_FLAG_INDEX):
res.current_epoch_TIMELY_TARGET += validator_effective_balance
for flag_index in TimelyFlag:
res.previous_epoch[flag_index] =
max(EFFECTIVE_BALANCE_INCREMENT, res.previous_epoch[flag_index])
res.current_epoch_TIMELY_TARGET =
max(EFFECTIVE_BALANCE_INCREMENT, res.current_epoch_TIMELY_TARGET)
res.current_epoch = max(EFFECTIVE_BALANCE_INCREMENT, res.current_epoch)
res
func is_unslashed_participating_index(
state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
deneb.BeaconState | electra.BeaconState,
flag_index: TimelyFlag, epoch: Epoch, validator_index: ValidatorIndex): bool =
doAssert epoch in [get_previous_epoch(state), get_current_epoch(state)]
# TODO hoist this conditional
let epoch_participation =
if epoch == get_current_epoch(state):
unsafeAddr state.current_epoch_participation
else:
unsafeAddr state.previous_epoch_participation
is_active_validator(state.validators[validator_index], epoch) and
has_flag(epoch_participation[].item(validator_index), flag_index) and
not state.validators[validator_index].slashed
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# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#justification-and-finalization
type FinalityState = object
slot: Slot
current_epoch_ancestor_root: Eth2Digest
previous_epoch_ancestor_root: Eth2Digest
justification_bits: JustificationBits
previous_justified_checkpoint: Checkpoint
current_justified_checkpoint: Checkpoint
finalized_checkpoint: Checkpoint
func toFinalityState(state: ForkyBeaconState): FinalityState =
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let
current_epoch = get_current_epoch(state)
previous_epoch = get_previous_epoch(state)
FinalityState(
slot: state.slot,
current_epoch_ancestor_root:
if state.slot > current_epoch.start_slot:
get_block_root(state, current_epoch)
else:
ZERO_HASH,
previous_epoch_ancestor_root:
if state.slot > previous_epoch.start_slot:
get_block_root(state, previous_epoch)
else:
ZERO_HASH,
justification_bits:
state.justification_bits,
previous_justified_checkpoint:
state.previous_justified_checkpoint,
current_justified_checkpoint:
state.current_justified_checkpoint,
finalized_checkpoint:
state.finalized_checkpoint)
func get_current_epoch(state: FinalityState): Epoch =
state.slot.epoch
func get_previous_epoch(state: FinalityState): Epoch =
get_previous_epoch(get_current_epoch(state))
func get_block_root(state: FinalityState, epoch: Epoch): Eth2Digest =
doAssert state.slot > epoch.start_slot
if epoch == get_current_epoch(state):
state.current_epoch_ancestor_root
else:
doAssert epoch == get_previous_epoch(state)
state.previous_epoch_ancestor_root
type
JustificationAndFinalizationInfo = object
previous_justified_checkpoint: Checkpoint
current_justified_checkpoint: Checkpoint
finalized_checkpoint: Checkpoint
justification_bits: JustificationBits
proc weigh_justification_and_finalization(
state: ForkyBeaconState | FinalityState,
total_active_balance: Gwei,
previous_epoch_target_balance: Gwei,
current_epoch_target_balance: Gwei,
flags: UpdateFlags = {}): JustificationAndFinalizationInfo =
let
previous_epoch = get_previous_epoch(state)
current_epoch = get_current_epoch(state)
old_previous_justified_checkpoint = state.previous_justified_checkpoint
old_current_justified_checkpoint = state.current_justified_checkpoint
var res = JustificationAndFinalizationInfo(
previous_justified_checkpoint: state.previous_justified_checkpoint,
current_justified_checkpoint: state.current_justified_checkpoint,
finalized_checkpoint: state.finalized_checkpoint,
justification_bits: state.justification_bits)
# Process justifications
res.previous_justified_checkpoint = res.current_justified_checkpoint
## Spec:
## state.justification_bits[1:] = state.justification_bits[:-1]
## state.justification_bits[0] = 0b0
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#misc
const JUSTIFICATION_BITS_LENGTH = 4
res.justification_bits = JustificationBits(
(uint8(res.justification_bits) shl 1) and
uint8((2^JUSTIFICATION_BITS_LENGTH) - 1))
if previous_epoch_target_balance * 3 >= total_active_balance * 2:
res.current_justified_checkpoint = Checkpoint(
epoch: previous_epoch, root: get_block_root(state, previous_epoch))
uint8(res.justification_bits).setBit 1
trace "Justified with previous epoch",
current_epoch = current_epoch,
checkpoint = shortLog(res.current_justified_checkpoint)
elif strictVerification in flags:
fatal "Low attestation participation in previous epoch",
total_active_balance,
previous_epoch_target_balance,
current_epoch_target_balance,
epoch = get_current_epoch(state)
quit 1
if current_epoch_target_balance * 3 >= total_active_balance * 2:
res.current_justified_checkpoint = Checkpoint(
epoch: current_epoch, root: get_block_root(state, current_epoch))
uint8(res.justification_bits).setBit 0
trace "Justified with current epoch",
current_epoch = current_epoch,
checkpoint = shortLog(res.current_justified_checkpoint)
# Process finalizations
let bitfield = uint8(res.justification_bits)
## The 2nd/3rd/4th most recent epochs are justified, the 2nd using the 4th
## as source
if (bitfield and 0b1110) == 0b1110 and
old_previous_justified_checkpoint.epoch + 3 == current_epoch:
res.finalized_checkpoint = old_previous_justified_checkpoint
trace "Finalized with rule 234",
current_epoch = current_epoch,
checkpoint = shortLog(res.finalized_checkpoint)
## The 2nd/3rd most recent epochs are justified, the 2nd using the 3rd as
## source
if (bitfield and 0b110) == 0b110 and
old_previous_justified_checkpoint.epoch + 2 == current_epoch:
res.finalized_checkpoint = old_previous_justified_checkpoint
trace "Finalized with rule 23",
current_epoch = current_epoch,
checkpoint = shortLog(res.finalized_checkpoint)
## The 1st/2nd/3rd most recent epochs are justified, the 1st using the 3rd as
## source
if (bitfield and 0b111) == 0b111 and
old_current_justified_checkpoint.epoch + 2 == current_epoch:
res.finalized_checkpoint = old_current_justified_checkpoint
trace "Finalized with rule 123",
current_epoch = current_epoch,
checkpoint = shortLog(res.finalized_checkpoint)
## The 1st/2nd most recent epochs are justified, the 1st using the 2nd as
## source
if (bitfield and 0b11) == 0b11 and
old_current_justified_checkpoint.epoch + 1 == current_epoch:
res.finalized_checkpoint = old_current_justified_checkpoint
trace "Finalized with rule 12",
current_epoch = current_epoch,
checkpoint = shortLog(res.finalized_checkpoint)
res
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#justification-and-finalization
proc process_justification_and_finalization*(
state: var phase0.BeaconState,
balances: TotalBalances, flags: UpdateFlags = {}) =
# Initial FFG checkpoint values have a `0x00` stub for `root`.
# Skip FFG updates in the first two epochs to avoid corner cases that might
# result in modifying this stub.
if get_current_epoch(state) <= GENESIS_EPOCH + 1:
return
let jfRes = weigh_justification_and_finalization(
state, balances.current_epoch,
balances.previous_epoch_target_attesters,
balances.current_epoch_target_attesters, flags)
assign(
state.previous_justified_checkpoint, jfRes.previous_justified_checkpoint)
assign(
state.current_justified_checkpoint, jfRes.current_justified_checkpoint)
assign(state.finalized_checkpoint, jfRes.finalized_checkpoint)
assign(state.justification_bits, jfRes.justification_bits)
proc compute_unrealized_finality*(
state: phase0.BeaconState, cache: var StateCache): FinalityCheckpoints =
if get_current_epoch(state) <= GENESIS_EPOCH + 1:
return FinalityCheckpoints(
justified: state.current_justified_checkpoint,
finalized: state.finalized_checkpoint)
var info: phase0.EpochInfo
info.init(state)
info.process_attestations(state, cache)
template balances(): auto = info.balances
var finalityState = state.toFinalityState()
let jfRes = weigh_justification_and_finalization(
finalityState, balances.current_epoch,
balances.previous_epoch_target_attesters,
balances.current_epoch_target_attesters)
FinalityCheckpoints(
justified: jfRes.current_justified_checkpoint,
finalized: jfRes.finalized_checkpoint)
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#justification-and-finalization
proc process_justification_and_finalization*(
state: var (altair.BeaconState | bellatrix.BeaconState |
capella.BeaconState | deneb.BeaconState | electra.BeaconState),
balances: UnslashedParticipatingBalances,
flags: UpdateFlags = {}) =
# Initial FFG checkpoint values have a `0x00` stub for `root`.
# Skip FFG updates in the first two epochs to avoid corner cases that might
# result in modifying this stub.
if get_current_epoch(state) <= GENESIS_EPOCH + 1:
return
let jfRes = weigh_justification_and_finalization(
state, balances.current_epoch,
balances.previous_epoch[TIMELY_TARGET_FLAG_INDEX],
balances.current_epoch_TIMELY_TARGET, flags)
assign(
state.previous_justified_checkpoint, jfRes.previous_justified_checkpoint)
assign(
state.current_justified_checkpoint, jfRes.current_justified_checkpoint)
assign(state.finalized_checkpoint, jfRes.finalized_checkpoint)
assign(state.justification_bits, jfRes.justification_bits)
proc compute_unrealized_finality*(
state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
deneb.BeaconState | electra.BeaconState): FinalityCheckpoints =
if get_current_epoch(state) <= GENESIS_EPOCH + 1:
return FinalityCheckpoints(
justified: state.current_justified_checkpoint,
finalized: state.finalized_checkpoint)
let balances = get_unslashed_participating_balances(state)
var finalityState = state.toFinalityState()
let jfRes = weigh_justification_and_finalization(
finalityState, balances.current_epoch,
balances.previous_epoch[TIMELY_TARGET_FLAG_INDEX],
balances.current_epoch_TIMELY_TARGET)
FinalityCheckpoints(
justified: jfRes.current_justified_checkpoint,
finalized: jfRes.finalized_checkpoint)
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#helpers
func get_base_reward_sqrt*(state: phase0.BeaconState, index: ValidatorIndex,
improve slot processing speeds (#1670) about 40% better slot processing times (with LTO enabled) - these don't do BLS but are used heavily during replay (state transition = slot + block transition) tests using a recent medalla state and advancing it 1000 slots: ``` ./ncli slots --preState2:state-302271-3c1dbf19-c1f944bf.ssz --slot:1000 --postState2:xx.ssz ``` pre: ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 39.236, 0.000, 39.236, 39.236, 1, Load state from file 0.049, 0.002, 0.046, 0.063, 968, Apply slot 256.504, 81.008, 213.471, 591.902, 32, Apply epoch slot 28.597, 0.000, 28.597, 28.597, 1, Save state to file ``` cast: ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 37.079, 0.000, 37.079, 37.079, 1, Load state from file 0.042, 0.002, 0.040, 0.090, 968, Apply slot 215.552, 68.763, 180.155, 500.103, 32, Apply epoch slot 25.106, 0.000, 25.106, 25.106, 1, Save state to file ``` cast+rewards: ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 40.049, 0.000, 40.049, 40.049, 1, Load state from file 0.048, 0.001, 0.045, 0.060, 968, Apply slot 164.981, 76.273, 142.099, 477.868, 32, Apply epoch slot 28.498, 0.000, 28.498, 28.498, 1, Save state to file ``` cast+rewards+shr ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 12.898, 0.000, 12.898, 12.898, 1, Load state from file 0.039, 0.002, 0.038, 0.054, 968, Apply slot 139.971, 68.797, 120.088, 428.844, 32, Apply epoch slot 24.761, 0.000, 24.761, 24.761, 1, Save state to file ```
2020-09-16 20:59:33 +00:00
total_balance_sqrt: auto): Gwei =
# Spec function recalculates total_balance every time, which creates an
# O(n^2) situation.
let effective_balance = state.validators[index].effective_balance
2019-06-28 13:44:44 +00:00
effective_balance * BASE_REWARD_FACTOR div
improve slot processing speeds (#1670) about 40% better slot processing times (with LTO enabled) - these don't do BLS but are used heavily during replay (state transition = slot + block transition) tests using a recent medalla state and advancing it 1000 slots: ``` ./ncli slots --preState2:state-302271-3c1dbf19-c1f944bf.ssz --slot:1000 --postState2:xx.ssz ``` pre: ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 39.236, 0.000, 39.236, 39.236, 1, Load state from file 0.049, 0.002, 0.046, 0.063, 968, Apply slot 256.504, 81.008, 213.471, 591.902, 32, Apply epoch slot 28.597, 0.000, 28.597, 28.597, 1, Save state to file ``` cast: ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 37.079, 0.000, 37.079, 37.079, 1, Load state from file 0.042, 0.002, 0.040, 0.090, 968, Apply slot 215.552, 68.763, 180.155, 500.103, 32, Apply epoch slot 25.106, 0.000, 25.106, 25.106, 1, Save state to file ``` cast+rewards: ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 40.049, 0.000, 40.049, 40.049, 1, Load state from file 0.048, 0.001, 0.045, 0.060, 968, Apply slot 164.981, 76.273, 142.099, 477.868, 32, Apply epoch slot 28.498, 0.000, 28.498, 28.498, 1, Save state to file ``` cast+rewards+shr ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 12.898, 0.000, 12.898, 12.898, 1, Load state from file 0.039, 0.002, 0.038, 0.054, 968, Apply slot 139.971, 68.797, 120.088, 428.844, 32, Apply epoch slot 24.761, 0.000, 24.761, 24.761, 1, Save state to file ```
2020-09-16 20:59:33 +00:00
total_balance_sqrt div BASE_REWARDS_PER_EPOCH
2019-06-28 13:44:44 +00:00
func get_proposer_reward*(base_reward: Gwei): Gwei =
# Spec version recalculates get_total_active_balance(state) quadratically
base_reward div PROPOSER_REWARD_QUOTIENT
func is_in_inactivity_leak(finality_delay: uint64): bool =
finality_delay > MIN_EPOCHS_TO_INACTIVITY_PENALTY
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func get_finality_delay*(state: ForkyBeaconState): uint64 =
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get_previous_epoch(state) - state.finalized_checkpoint.epoch
func get_attestation_component_reward*(attesting_balance: Gwei,
total_balance: Gwei,
base_reward: uint64,
finality_delay: uint64): Gwei =
if is_in_inactivity_leak(finality_delay):
# Since full base reward will be canceled out by inactivity penalty deltas,
# optimal participation receives full base reward compensation here.
base_reward
else:
let reward_numerator =
base_reward * (attesting_balance div EFFECTIVE_BALANCE_INCREMENT)
reward_numerator div (total_balance div EFFECTIVE_BALANCE_INCREMENT)
func get_attestation_component_delta(is_unslashed_attester: bool,
attesting_balance: Gwei,
total_balance: Gwei,
base_reward: uint64,
finality_delay: uint64): RewardDelta =
2020-06-08 18:41:50 +00:00
# Helper with shared logic for use by get source, target, and head deltas
# functions
if is_unslashed_attester:
RewardDelta(rewards: get_attestation_component_reward(
attesting_balance,
total_balance,
base_reward,
finality_delay))
else:
RewardDelta(penalties: base_reward)
2020-06-08 18:41:50 +00:00
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#components-of-attestation-deltas
func get_source_delta*(validator: RewardStatus,
base_reward: uint64,
balances: TotalBalances,
finality_delay: uint64): RewardDelta =
## Return attester micro-rewards/penalties for source-vote for each validator.
get_attestation_component_delta(
validator.is_previous_epoch_attester.isSome() and
not (validator.flags.contains RewardFlags.isSlashed),
balances.previous_epoch_attesters,
balances.current_epoch,
base_reward,
finality_delay)
func get_target_delta*(validator: RewardStatus,
base_reward: uint64,
balances: TotalBalances,
finality_delay: uint64): RewardDelta =
## Return attester micro-rewards/penalties for target-vote for each validator.
get_attestation_component_delta(
validator.flags.contains(RewardFlags.isPreviousEpochTargetAttester) and
not (validator.flags.contains(RewardFlags.isSlashed)),
balances.previous_epoch_target_attesters,
balances.current_epoch,
base_reward,
finality_delay)
func get_head_delta*(validator: RewardStatus,
base_reward: uint64,
balances: TotalBalances,
finality_delay: uint64): RewardDelta =
## Return attester micro-rewards/penalties for head-vote for each validator.
get_attestation_component_delta(
validator.flags.contains(RewardFlags.isPreviousEpochHeadAttester) and
((not validator.flags.contains(RewardFlags.isSlashed))),
balances.previous_epoch_head_attesters,
balances.current_epoch,
base_reward,
finality_delay)
func get_inclusion_delay_delta*(validator: RewardStatus,
base_reward: uint64):
2023-01-11 12:29:21 +00:00
(RewardDelta, Opt[(uint64, RewardDelta)]) =
## Return proposer and inclusion delay micro-rewards/penalties for each validator.
if validator.is_previous_epoch_attester.isSome() and ((not validator.flags.contains(RewardFlags.isSlashed))):
let
inclusion_info = validator.is_previous_epoch_attester.get()
proposer_reward = get_proposer_reward(base_reward)
proposer_delta = RewardDelta(rewards: proposer_reward)
2020-06-08 18:41:50 +00:00
let
max_attester_reward = base_reward - proposer_reward
delta = RewardDelta(rewards: max_attester_reward div inclusion_info.delay)
proposer_index = inclusion_info.proposer_index;
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return (delta, Opt.some((proposer_index, proposer_delta)))
func get_inactivity_penalty_delta*(validator: RewardStatus,
base_reward: Gwei,
finality_delay: uint64): RewardDelta =
## Return inactivity reward/penalty deltas for each validator.
var delta: RewardDelta
if is_in_inactivity_leak(finality_delay):
# If validator is performing optimally this cancels all rewards for a neutral balance
delta.penalties +=
BASE_REWARDS_PER_EPOCH * base_reward - get_proposer_reward(base_reward)
# Additionally, all validators whose FFG target didn't match are penalized extra
# This condition is equivalent to this condition from the spec:
# `index not in get_unslashed_attesting_indices(state, matching_target_attestations)`
if (validator.flags.contains(RewardFlags.isSlashed)) or
((not validator.flags.contains(RewardFlags.isPreviousEpochTargetAttester))):
delta.penalties +=
validator.current_epoch_effective_balance * finality_delay div
INACTIVITY_PENALTY_QUOTIENT
delta
2020-06-08 18:41:50 +00:00
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#get_attestation_deltas
func get_attestation_deltas(
state: phase0.BeaconState, info: var phase0.EpochInfo) =
## Update rewards with attestation reward/penalty deltas for each validator.
let
finality_delay = get_finality_delay(state)
total_balance = info.balances.current_epoch
total_balance_sqrt = integer_squareroot(total_balance)
# Filter out ineligible validators. All sub-functions of the spec do this
# except for `get_inclusion_delay_deltas`. It's safe to do so here because
# any validator that is in the unslashed indices of the matching source
# attestations is active, and therefore eligible.
for index, validator in info.validators.mpairs():
if not is_eligible_validator(validator):
continue
let
base_reward = get_base_reward_sqrt(
state, index.ValidatorIndex, total_balance_sqrt)
improve slot processing speeds (#1670) about 40% better slot processing times (with LTO enabled) - these don't do BLS but are used heavily during replay (state transition = slot + block transition) tests using a recent medalla state and advancing it 1000 slots: ``` ./ncli slots --preState2:state-302271-3c1dbf19-c1f944bf.ssz --slot:1000 --postState2:xx.ssz ``` pre: ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 39.236, 0.000, 39.236, 39.236, 1, Load state from file 0.049, 0.002, 0.046, 0.063, 968, Apply slot 256.504, 81.008, 213.471, 591.902, 32, Apply epoch slot 28.597, 0.000, 28.597, 28.597, 1, Save state to file ``` cast: ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 37.079, 0.000, 37.079, 37.079, 1, Load state from file 0.042, 0.002, 0.040, 0.090, 968, Apply slot 215.552, 68.763, 180.155, 500.103, 32, Apply epoch slot 25.106, 0.000, 25.106, 25.106, 1, Save state to file ``` cast+rewards: ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 40.049, 0.000, 40.049, 40.049, 1, Load state from file 0.048, 0.001, 0.045, 0.060, 968, Apply slot 164.981, 76.273, 142.099, 477.868, 32, Apply epoch slot 28.498, 0.000, 28.498, 28.498, 1, Save state to file ``` cast+rewards+shr ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 12.898, 0.000, 12.898, 12.898, 1, Load state from file 0.039, 0.002, 0.038, 0.054, 968, Apply slot 139.971, 68.797, 120.088, 428.844, 32, Apply epoch slot 24.761, 0.000, 24.761, 24.761, 1, Save state to file ```
2020-09-16 20:59:33 +00:00
let
source_delta = get_source_delta(
validator, base_reward, info.balances, finality_delay)
target_delta = get_target_delta(
validator, base_reward, info.balances, finality_delay)
head_delta = get_head_delta(
validator, base_reward, info.balances, finality_delay)
(inclusion_delay_delta, proposer_delta) =
get_inclusion_delay_delta(validator, base_reward)
inactivity_delta = get_inactivity_penalty_delta(
validator, base_reward, finality_delay)
validator.delta.add source_delta
validator.delta.add target_delta
validator.delta.add head_delta
validator.delta.add inclusion_delay_delta
validator.delta.add inactivity_delta
if proposer_delta.isSome:
let proposer_index = proposer_delta.get()[0]
if proposer_index < info.validators.lenu64:
info.validators[proposer_index].delta.add(
proposer_delta.get()[1])
2020-06-08 18:41:50 +00:00
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#get_base_reward
func get_base_reward_increment*(
state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
deneb.BeaconState | electra.BeaconState,
2022-10-27 06:29:24 +00:00
index: ValidatorIndex, base_reward_per_increment: Gwei): Gwei =
## Return the base reward for the validator defined by ``index`` with respect
## to the current ``state``.
let increments =
state.validators[index].effective_balance div EFFECTIVE_BALANCE_INCREMENT
increments * base_reward_per_increment
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#get_flag_index_deltas
2022-10-27 06:29:24 +00:00
func get_flag_index_reward*(
state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
deneb.BeaconState | electra.BeaconState,
2022-10-27 06:29:24 +00:00
base_reward: Gwei, active_increments: Gwei,
unslashed_participating_increments: Gwei,
weight, finality_delay: uint64): Gwei =
if not is_in_inactivity_leak(finality_delay):
let reward_numerator =
base_reward * weight * unslashed_participating_increments
reward_numerator div (active_increments * WEIGHT_DENOMINATOR)
else:
0.Gwei
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#get_flag_index_deltas
func get_unslashed_participating_increment*(
info: altair.EpochInfo | bellatrix.BeaconState, flag_index: TimelyFlag): Gwei =
info.balances.previous_epoch[flag_index] div EFFECTIVE_BALANCE_INCREMENT
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#get_flag_index_deltas
func get_active_increments*(
info: altair.EpochInfo | bellatrix.BeaconState): Gwei =
info.balances.current_epoch div EFFECTIVE_BALANCE_INCREMENT
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#get_flag_index_deltas
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#modified-get_inactivity_penalty_deltas
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/bellatrix/beacon-chain.md#modified-get_inactivity_penalty_deltas
# Combines get_flag_index_deltas() and get_inactivity_penalty_deltas()
iterator get_flag_and_inactivity_deltas*(
cfg: RuntimeConfig,
state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
deneb.BeaconState | electra.BeaconState,
base_reward_per_increment: Gwei, info: var altair.EpochInfo,
finality_delay: uint64):
(ValidatorIndex, Gwei, Gwei, Gwei, Gwei, Gwei, Gwei) =
## Return the deltas for a given ``flag_index`` by scanning through the
## participation flags.
#
# This deviates from spec by processing all flags at once, so does not take a
# flag_index parameter. Fold get_inactivity_penalty_deltas loop into this one
# as well.
const INACTIVITY_PENALTY_QUOTIENT =
when state is altair.BeaconState:
INACTIVITY_PENALTY_QUOTIENT_ALTAIR
else:
INACTIVITY_PENALTY_QUOTIENT_BELLATRIX
static: doAssert ord(high(TimelyFlag)) == 2
let
previous_epoch = get_previous_epoch(state)
active_increments = get_active_increments(info)
penalty_denominator =
cfg.INACTIVITY_SCORE_BIAS * INACTIVITY_PENALTY_QUOTIENT
epoch_participation =
if previous_epoch == get_current_epoch(state):
unsafeAddr state.current_epoch_participation
else:
unsafeAddr state.previous_epoch_participation
participating_increments = [
get_unslashed_participating_increment(info, TIMELY_SOURCE_FLAG_INDEX),
get_unslashed_participating_increment(info, TIMELY_TARGET_FLAG_INDEX),
get_unslashed_participating_increment(info, TIMELY_HEAD_FLAG_INDEX)]
for vidx in state.validators.vindices:
if not is_eligible_validator(info.validators[vidx]):
continue
let
base_reward = get_base_reward_increment(state, vidx, base_reward_per_increment)
pflags =
if is_active_validator(state.validators[vidx], previous_epoch) and
not state.validators[vidx].slashed:
epoch_participation[].item(vidx)
else:
0
if has_flag(pflags, TIMELY_SOURCE_FLAG_INDEX):
info.validators[vidx].flags.incl ParticipationFlag.timelySourceAttester
if has_flag(pflags, TIMELY_TARGET_FLAG_INDEX):
info.validators[vidx].flags.incl ParticipationFlag.timelyTargetAttester
if has_flag(pflags, TIMELY_HEAD_FLAG_INDEX):
info.validators[vidx].flags.incl ParticipationFlag.timelyHeadAttester
template reward(flag: untyped): untyped =
if has_flag(pflags, flag):
get_flag_index_reward(
state, base_reward, active_increments,
participating_increments[ord(flag)],
PARTICIPATION_FLAG_WEIGHTS[flag], finality_delay)
else:
0
template penalty(flag: untyped): untyped =
if not has_flag(pflags, flag):
base_reward * PARTICIPATION_FLAG_WEIGHTS[flag] div WEIGHT_DENOMINATOR
else:
0
let inactivity_penalty =
if has_flag(pflags, TIMELY_TARGET_FLAG_INDEX):
0.Gwei
else:
let penalty_numerator = state.validators[vidx].effective_balance * state.inactivity_scores[vidx]
penalty_numerator div penalty_denominator
# Yielding these as a structure with identifiable names rather than
# multiple-return-value style creates spurious nimZeroMem calls.
yield
(vidx, reward(TIMELY_SOURCE_FLAG_INDEX),
reward(TIMELY_TARGET_FLAG_INDEX), reward(TIMELY_HEAD_FLAG_INDEX),
penalty(TIMELY_SOURCE_FLAG_INDEX), penalty(TIMELY_TARGET_FLAG_INDEX),
inactivity_penalty)
2021-11-05 16:49:03 +00:00
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/phase0/beacon-chain.md#rewards-and-penalties-1
func process_rewards_and_penalties*(
state: var phase0.BeaconState, info: var phase0.EpochInfo) =
# No rewards are applied at the end of `GENESIS_EPOCH` because rewards are
# for work done in the previous epoch
doAssert info.validators.len == state.validators.len
2019-06-28 13:44:44 +00:00
if get_current_epoch(state) == GENESIS_EPOCH:
return
get_attestation_deltas(state, info)
performance fixes (#2259) * performance fixes * don't mark tree cache as dirty on read-only List accesses * store only blob in memory for keys and signatures, parse blob lazily * compare public keys by blob instead of parsing / converting to raw * compare Eth2Digest using non-constant-time comparison * avoid some unnecessary validator copying This branch will in particular speed up deposit processing which has been slowing down block replay. Pre (mainnet, 1600 blocks): ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3450.269, 0.000, 3450.269, 3450.269, 1, Initialize DB 0.417, 0.822, 0.036, 21.098, 1400, Load block from database 16.521, 0.000, 16.521, 16.521, 1, Load state from database 27.906, 50.846, 8.104, 1507.633, 1350, Apply block 52.617, 37.029, 20.640, 135.938, 50, Apply epoch block ``` Post: ``` 3502.715, 0.000, 3502.715, 3502.715, 1, Initialize DB 0.080, 0.560, 0.035, 21.015, 1400, Load block from database 17.595, 0.000, 17.595, 17.595, 1, Load state from database 15.706, 11.028, 8.300, 107.537, 1350, Apply block 33.217, 12.622, 17.331, 60.580, 50, Apply epoch block ``` * more perf fixes * load EpochRef cache into StateCache more aggressively * point out security concern with public key cache * reuse proposer index from state when processing block * avoid genericAssign in a few more places * don't parse key when signature is unparseable * fix `==` overload for Eth2Digest * preallocate validator list when getting active validators * speed up proposer index calculation a little bit * reuse cache when replaying blocks in ncli_db * avoid a few more copying loops ``` Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3279.158, 0.000, 3279.158, 3279.158, 1, Initialize DB 0.072, 0.357, 0.035, 13.400, 1400, Load block from database 17.295, 0.000, 17.295, 17.295, 1, Load state from database 5.918, 9.896, 0.198, 98.028, 1350, Apply block 15.888, 10.951, 7.902, 39.535, 50, Apply epoch block 0.000, 0.000, 0.000, 0.000, 0, Database block store ``` * clear full balance cache before processing rewards and penalties ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3947.901, 0.000, 3947.901, 3947.901, 1, Initialize DB 0.124, 0.506, 0.026, 202.370, 363345, Load block from database 97.614, 0.000, 97.614, 97.614, 1, Load state from database 0.186, 0.188, 0.012, 99.561, 357262, Advance slot, non-epoch 14.161, 5.966, 1.099, 395.511, 11524, Advance slot, epoch 1.372, 4.170, 0.017, 276.401, 363345, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database block store ```
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# Here almost all balances are updated (assuming most validators are active) -
# clearing the cache becomes a bottleneck if done item by item because of the
# recursive nature of cache clearing - instead, we clear the whole cache then
# update the raw list directly
state.balances.clearCache()
for idx, v in info.validators:
var balance = state.balances.item(idx)
increase_balance(balance, v.delta.rewards)
decrease_balance(balance, v.delta.penalties)
state.balances.asSeq()[idx] = balance
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# https://github.com/ethereum/consensus-specs/blob/v1.4.0-alpha.3/specs/altair/beacon-chain.md#rewards-and-penalties
func process_rewards_and_penalties*(
cfg: RuntimeConfig,
state: var (altair.BeaconState | bellatrix.BeaconState |
capella.BeaconState | deneb.BeaconState | electra.BeaconState),
info: var altair.EpochInfo) =
if get_current_epoch(state) == GENESIS_EPOCH:
return
let
total_active_balance = info.balances.current_epoch
base_reward_per_increment = get_base_reward_per_increment(
total_active_balance)
finality_delay = get_finality_delay(state)
doAssert state.validators.len() == info.validators.len()
for validator_index, reward0, reward1, reward2, penalty0, penalty1, penalty2 in
get_flag_and_inactivity_deltas(
cfg, state, base_reward_per_increment, info, finality_delay):
# templatize this loop? or replicate a couple lines of code?
info.validators[validator_index].delta.rewards += reward0 + reward1 + reward2
info.validators[validator_index].delta.penalties += penalty0 + penalty1 + penalty2
# Here almost all balances are updated (assuming most validators are active) -
# clearing the cache becomes a bottleneck if done item by item because of the
# recursive nature of cache clearing - instead, we clear the whole cache then
# update the raw list directly
state.balances.clearCache()
for vidx in state.validators.vindices:
var balance = state.balances.item(vidx)
increase_balance(balance, info.validators[vidx].delta.rewards)
decrease_balance(balance, info.validators[vidx].delta.penalties)
state.balances.asSeq()[vidx] = balance
from std/heapqueue import HeapQueue, `[]`, len, push, replace
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#registry-updates
func process_registry_updates*(
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cfg: RuntimeConfig, state: var ForkyBeaconState, cache: var StateCache):
Result[void, cstring] =
## Process activation eligibility and ejections
# Make visible, e.g.,
# https://github.com/status-im/nimbus-eth2/pull/608
# https://github.com/sigp/lighthouse/pull/657
let epoch {.used.} = get_current_epoch(state)
trace "process_registry_updates validator balances",
balances=state.balances,
active_validator_indices=get_active_validator_indices(state, epoch),
epoch=epoch
# is_active_validator(...) is activation_epoch <= epoch < exit_epoch,
# and changes here to either activation_epoch or exit_epoch only take
# effect with a compute_activation_exit_epoch(...) delay of, based on
# the current epoch, 1 + MAX_SEED_LOOKAHEAD epochs ahead. Thus caches
# remain valid for this epoch through though this function along with
# the rest of the epoch transition.
#
# This implementation fuses the two loops over all validators in the
# spec code.
## Queue validators eligible for activation and not dequeued for activation
var activation_queue: HeapQueue[(uint64, uint32)]
let churn_limit =
when typeof(state).kind >= ConsensusFork.Deneb:
get_validator_activation_churn_limit(cfg, state, cache)
else:
get_validator_churn_limit(cfg, state, cache)
for vidx in state.validators.vindices:
if is_eligible_for_activation_queue(state.validators.item(vidx)):
state.validators.mitem(vidx).activation_eligibility_epoch =
get_current_epoch(state) + 1
if is_active_validator(state.validators.item(vidx), get_current_epoch(state)) and
state.validators.item(vidx).effective_balance <= cfg.EJECTION_BALANCE:
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? initiate_validator_exit(cfg, state, vidx, cache)
let validator = unsafeAddr state.validators.item(vidx)
if is_eligible_for_activation(state, validator[]):
let val_key =
(FAR_FUTURE_EPOCH - validator[].activation_eligibility_epoch,
high(distinctBase(ValidatorIndex)) - distinctBase(vidx))
if activation_queue.len.uint64 < churn_limit:
activation_queue.push val_key
elif val_key > activation_queue[0]:
discard activation_queue.replace val_key
## Dequeued validators for activation up to activation churn limit
## (without resetting activation epoch)
doAssert activation_queue.len.uint64 <= churn_limit
for i in 0 ..< activation_queue.len:
let (_, vidx_complement) = activation_queue[i]
state.validators.mitem(
high(distinctBase(ValidatorIndex)) - vidx_complement).activation_epoch =
compute_activation_exit_epoch(get_current_epoch(state))
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ok()
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#slashings
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#slashings
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/bellatrix/beacon-chain.md#slashings
func get_adjusted_total_slashing_balance*(
state: ForkyBeaconState, total_balance: Gwei): Gwei =
const multiplier =
# tradeoff here about interleaving phase0/altair, but for these
# single-constant changes...
when state is phase0.BeaconState:
PROPORTIONAL_SLASHING_MULTIPLIER
elif state is altair.BeaconState:
PROPORTIONAL_SLASHING_MULTIPLIER_ALTAIR
elif state is bellatrix.BeaconState or state is capella.BeaconState or
state is deneb.BeaconState or state is electra.BeaconState:
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PROPORTIONAL_SLASHING_MULTIPLIER_BELLATRIX
else:
{.fatal: "process_slashings: incorrect BeaconState type".}
min(sum(state.slashings.data) * multiplier, total_balance)
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#slashings
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#slashings
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/bellatrix/beacon-chain.md#slashings
func slashing_penalty_applies*(validator: Validator, epoch: Epoch): bool =
validator.slashed and
epoch + EPOCHS_PER_SLASHINGS_VECTOR div 2 == validator.withdrawable_epoch
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#slashings
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#slashings
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/bellatrix/beacon-chain.md#slashings
func get_slashing_penalty*(validator: Validator,
adjusted_total_slashing_balance,
total_balance: Gwei): Gwei =
# Factored out from penalty numerator to avoid uint64 overflow
const increment = EFFECTIVE_BALANCE_INCREMENT
let penalty_numerator = validator.effective_balance div increment *
adjusted_total_slashing_balance
penalty_numerator div total_balance * increment
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#slashings
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#slashings
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/bellatrix/beacon-chain.md#slashings
func process_slashings*(state: var ForkyBeaconState, total_balance: Gwei) =
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let
More 0.8.0 updates (#311) * replace BeaconState.finalized_{epoch,root} with BeaconState.finalized_checkpoint; rename get_delayed_activation_exit_epoch(...) to compute_activation_exit_epoch(...) and mark as 0.8.0; update get_churn_limit(...)/get_validator_churn_limit(...) to 0.8.0; update process_registry_updates(...) to 0.8.0 * update process_crosslinks(...) to 0.8.0; mark compute_start_slot_of_epoch(...) and get_committee_count(...) as 0.8.0 * mark Fork, is_slashable_validator(...), and get_beacon_proposer_index(...) as 0.8.0 * rename LATEST_SLASHED_EXIT_LENGTH to EPOCHS_PER_SLASHINGS_VECTOR; update process_slashings(...) to 0.8.0; remove pointless type conversion warning in get_previous_epoch(...) * convert remaining references to finalized_epoch to finalized_checkpoint.epoch * update slash_validator(...) to 0.8.0; mark inital value, Gwei, and time constants as 0.8.0; mark hash(...) and processBlockHeader(...) as 0.8.0 * rename WHISTLEBLOWING_REWARD_QUOTIENT to WHISTLEBLOWER_REWARD_QUOTIENT; rename LATEST_ACTIVE_INDEX_ROOTS_LENGTH to EPOCHS_PER_HISTORICAL_VECTOR (randao will also get merged into this); remove get_active_index_root(...); mark time parameter, signature domain types, and max operations per block constants as 0.8.0; update rewards and penalties constants to 0.8.0 * update is_valid_indexed_attestation(...) to 0.8.0; mark process_slot(...) as 0.8.0 * replace BeaconState.{current,previous}_justified_{epoch,root} with BeaconState.{current,previous}_justified_checkpoint
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epoch = get_current_epoch(state)
adjusted_total_slashing_balance = get_adjusted_total_slashing_balance(
state, total_balance)
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for vidx in state.validators.vindices:
let validator = unsafeAddr state.validators.item(vidx)
if slashing_penalty_applies(validator[], epoch):
let penalty = get_slashing_penalty(
validator[], adjusted_total_slashing_balance, total_balance)
decrease_balance(state, vidx, penalty)
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# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#eth1-data-votes-updates
func process_eth1_data_reset*(state: var ForkyBeaconState) =
let next_epoch = get_current_epoch(state) + 1
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# Reset eth1 data votes
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if next_epoch mod EPOCHS_PER_ETH1_VOTING_PERIOD == 0:
state.eth1_data_votes = default(type state.eth1_data_votes)
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# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#effective-balances-updates
template effective_balance_might_update*(
balance: Gwei, effective_balance: Gwei): bool =
const
HYSTERESIS_INCREMENT = EFFECTIVE_BALANCE_INCREMENT div HYSTERESIS_QUOTIENT
DOWNWARD_THRESHOLD = HYSTERESIS_INCREMENT * HYSTERESIS_DOWNWARD_MULTIPLIER
UPWARD_THRESHOLD = HYSTERESIS_INCREMENT * HYSTERESIS_UPWARD_MULTIPLIER
balance + DOWNWARD_THRESHOLD < effective_balance or
effective_balance + UPWARD_THRESHOLD < balance
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/phase0/beacon-chain.md#effective-balances-updates
func process_effective_balance_updates*(state: var ForkyBeaconState) =
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# Update effective balances with hysteresis
for vidx in state.validators.vindices:
let
balance = state.balances.item(vidx)
effective_balance = state.validators.item(vidx).effective_balance
if effective_balance_might_update(balance, effective_balance):
speed up epoch processing 6x+ (#3089) * speed up epoch processing 6x+ This change above all helps contain long replay times on epoch change, reorg and deep history inspection via REST/RPC * most effective balances don't actually change due to MAX_EFFECTIVE_BALANCE * ditto for inactivity scores * avoid signature check for trusted sync aggregates pre: ``` ./ncli_db --db:mainnet_0/db bench --start-slot=-3200 All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3468.621, 0.000, 3468.621, 3468.621, 1, Initialize DB 0.357, 0.938, 0.171, 52.752, 3155, Load block from database 15691.471, 0.000, 15691.471, 15691.471, 1, Load state from database 6.100, 9.469, 0.033, 526.816, 3101, Advance slot, non-epoch 579.131, 9.523, 566.936, 610.328, 100, Advance slot, epoch 18.551, 16.317, 12.664, 136.668, 3155, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database load 0.000, 0.000, 0.000, 0.000, 0, Database store ``` post: ``` Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3488.541, 0.000, 3488.541, 3488.541, 1, Initialize DB 0.369, 1.123, 0.183, 63.208, 3155, Load block from database 13430.642, 0.000, 13430.642, 13430.642, 1, Load state from database 6.522, 1.721, 0.034, 36.708, 3101, Advance slot, non-epoch 89.074, 3.162, 83.573, 101.436, 100, Advance slot, epoch 18.325, 18.346, 13.005, 145.040, 3155, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database load 0.000, 0.000, 0.000, 0.000, 0, Database store ``` * Update beacon_chain/spec/state_transition_block.nim Co-authored-by: zah <zahary@gmail.com> * avoid copying validator data in accessor ``` 5291.227, 0.000, 5291.227, 5291.227, 1, Initialize DB 0.436, 0.928, 0.138, 51.438, 3155, Load block from database 11962.826, 0.000, 11962.826, 11962.826, 1, Load state from database 6.477, 1.675, 0.037, 34.174, 3101, Advance slot, non-epoch 76.633, 3.705, 71.106, 98.085, 100, Advance slot, epoch 18.301, 18.593, 13.208, 149.153, 3155, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database load 0.000, 0.000, 0.000, 0.000, 0, Database store ``` * work around compiler bug Co-authored-by: zah <zahary@gmail.com>
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let new_effective_balance =
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min(
balance - balance mod EFFECTIVE_BALANCE_INCREMENT,
MAX_EFFECTIVE_BALANCE)
speed up epoch processing 6x+ (#3089) * speed up epoch processing 6x+ This change above all helps contain long replay times on epoch change, reorg and deep history inspection via REST/RPC * most effective balances don't actually change due to MAX_EFFECTIVE_BALANCE * ditto for inactivity scores * avoid signature check for trusted sync aggregates pre: ``` ./ncli_db --db:mainnet_0/db bench --start-slot=-3200 All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3468.621, 0.000, 3468.621, 3468.621, 1, Initialize DB 0.357, 0.938, 0.171, 52.752, 3155, Load block from database 15691.471, 0.000, 15691.471, 15691.471, 1, Load state from database 6.100, 9.469, 0.033, 526.816, 3101, Advance slot, non-epoch 579.131, 9.523, 566.936, 610.328, 100, Advance slot, epoch 18.551, 16.317, 12.664, 136.668, 3155, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database load 0.000, 0.000, 0.000, 0.000, 0, Database store ``` post: ``` Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3488.541, 0.000, 3488.541, 3488.541, 1, Initialize DB 0.369, 1.123, 0.183, 63.208, 3155, Load block from database 13430.642, 0.000, 13430.642, 13430.642, 1, Load state from database 6.522, 1.721, 0.034, 36.708, 3101, Advance slot, non-epoch 89.074, 3.162, 83.573, 101.436, 100, Advance slot, epoch 18.325, 18.346, 13.005, 145.040, 3155, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database load 0.000, 0.000, 0.000, 0.000, 0, Database store ``` * Update beacon_chain/spec/state_transition_block.nim Co-authored-by: zah <zahary@gmail.com> * avoid copying validator data in accessor ``` 5291.227, 0.000, 5291.227, 5291.227, 1, Initialize DB 0.436, 0.928, 0.138, 51.438, 3155, Load block from database 11962.826, 0.000, 11962.826, 11962.826, 1, Load state from database 6.477, 1.675, 0.037, 34.174, 3101, Advance slot, non-epoch 76.633, 3.705, 71.106, 98.085, 100, Advance slot, epoch 18.301, 18.593, 13.208, 149.153, 3155, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database load 0.000, 0.000, 0.000, 0.000, 0, Database store ``` * work around compiler bug Co-authored-by: zah <zahary@gmail.com>
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# Protect against unnecessary cache invalidation
if new_effective_balance != effective_balance:
state.validators.mitem(vidx).effective_balance = new_effective_balance
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# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#slashings-balances-updates
func process_slashings_reset*(state: var ForkyBeaconState) =
let next_epoch = get_current_epoch(state) + 1
# Reset slashings
state.slashings[int(next_epoch mod EPOCHS_PER_SLASHINGS_VECTOR)] = 0.Gwei
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# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#randao-mixes-updates
func process_randao_mixes_reset*(state: var ForkyBeaconState) =
let
current_epoch = get_current_epoch(state)
next_epoch = current_epoch + 1
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# Set randao mix
state.randao_mixes[next_epoch mod EPOCHS_PER_HISTORICAL_VECTOR] =
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get_randao_mix(state, current_epoch)
func compute_historical_root*(state: var ForkyBeaconState): Eth2Digest =
# Equivalent to hash_tree_root(foo: HistoricalBatch), but without using
# significant additional stack or heap.
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#historicalbatch
# In response to https://github.com/status-im/nimbus-eth2/issues/921
hash_tree_root([
hash_tree_root(state.block_roots), hash_tree_root(state.state_roots)])
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#historical-roots-updates
func process_historical_roots_update*(state: var ForkyBeaconState) =
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## Set historical root accumulator
let next_epoch = get_current_epoch(state) + 1
if next_epoch mod (SLOTS_PER_HISTORICAL_ROOT div SLOTS_PER_EPOCH) == 0:
# Equivalent to hash_tree_root(foo: HistoricalBatch), but without using
# significant additional stack or heap.
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#historicalbatch
# In response to https://github.com/status-im/nimbus-eth2/issues/921
if not state.historical_roots.add state.compute_historical_root():
raiseAssert "no more room for historical roots, so long and thanks for the fish!"
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# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#participation-records-rotation
func process_participation_record_updates*(state: var phase0.BeaconState) =
performance fixes (#2259) * performance fixes * don't mark tree cache as dirty on read-only List accesses * store only blob in memory for keys and signatures, parse blob lazily * compare public keys by blob instead of parsing / converting to raw * compare Eth2Digest using non-constant-time comparison * avoid some unnecessary validator copying This branch will in particular speed up deposit processing which has been slowing down block replay. Pre (mainnet, 1600 blocks): ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3450.269, 0.000, 3450.269, 3450.269, 1, Initialize DB 0.417, 0.822, 0.036, 21.098, 1400, Load block from database 16.521, 0.000, 16.521, 16.521, 1, Load state from database 27.906, 50.846, 8.104, 1507.633, 1350, Apply block 52.617, 37.029, 20.640, 135.938, 50, Apply epoch block ``` Post: ``` 3502.715, 0.000, 3502.715, 3502.715, 1, Initialize DB 0.080, 0.560, 0.035, 21.015, 1400, Load block from database 17.595, 0.000, 17.595, 17.595, 1, Load state from database 15.706, 11.028, 8.300, 107.537, 1350, Apply block 33.217, 12.622, 17.331, 60.580, 50, Apply epoch block ``` * more perf fixes * load EpochRef cache into StateCache more aggressively * point out security concern with public key cache * reuse proposer index from state when processing block * avoid genericAssign in a few more places * don't parse key when signature is unparseable * fix `==` overload for Eth2Digest * preallocate validator list when getting active validators * speed up proposer index calculation a little bit * reuse cache when replaying blocks in ncli_db * avoid a few more copying loops ``` Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3279.158, 0.000, 3279.158, 3279.158, 1, Initialize DB 0.072, 0.357, 0.035, 13.400, 1400, Load block from database 17.295, 0.000, 17.295, 17.295, 1, Load state from database 5.918, 9.896, 0.198, 98.028, 1350, Apply block 15.888, 10.951, 7.902, 39.535, 50, Apply epoch block 0.000, 0.000, 0.000, 0.000, 0, Database block store ``` * clear full balance cache before processing rewards and penalties ``` All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3947.901, 0.000, 3947.901, 3947.901, 1, Initialize DB 0.124, 0.506, 0.026, 202.370, 363345, Load block from database 97.614, 0.000, 97.614, 97.614, 1, Load state from database 0.186, 0.188, 0.012, 99.561, 357262, Advance slot, non-epoch 14.161, 5.966, 1.099, 395.511, 11524, Advance slot, epoch 1.372, 4.170, 0.017, 276.401, 363345, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database block store ```
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# Rotate current/previous epoch attestations - using swap avoids copying all
# elements using a slow genericSeqAssign
state.previous_epoch_attestations.clear()
swap(state.previous_epoch_attestations, state.current_epoch_attestations)
2019-06-28 13:44:44 +00:00
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#participation-flags-updates
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func process_participation_flag_updates*(
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state: var (altair.BeaconState | bellatrix.BeaconState |
capella.BeaconState | deneb.BeaconState |
electra.BeaconState)) =
state.previous_epoch_participation = state.current_epoch_participation
const zero = 0.ParticipationFlags
for i in 0 ..< state.current_epoch_participation.len:
asList(state.current_epoch_participation)[i] = zero
# Shouldn't be wasted zeroing, because state.current_epoch_participation only
# grows. New elements are automatically initialized to 0, as required.
doAssert state.current_epoch_participation.asList.setLen(state.validators.len)
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#sync-committee-updates
func process_sync_committee_updates*(
state: var (altair.BeaconState | bellatrix.BeaconState |
capella.BeaconState | deneb.BeaconState |
electra.BeaconState)) =
let next_epoch = get_current_epoch(state) + 1
if next_epoch.is_sync_committee_period():
state.current_sync_committee = state.next_sync_committee
state.next_sync_committee = get_next_sync_committee(state)
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#inactivity-scores
template compute_inactivity_update(
state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
deneb.BeaconState | electra.BeaconState,
info: altair.EpochInfo, pre_inactivity_score: Gwei): Gwei =
if not is_eligible_validator(info.validators[index]):
continue
let previous_epoch = get_previous_epoch(state) # get_eligible_validator_indices()
# Increase the inactivity score of inactive validators
var inactivity_score = pre_inactivity_score
# TODO activeness already checked; remove redundant checks between
# is_active_validator and is_unslashed_participating_index
if is_unslashed_participating_index(
state, TIMELY_TARGET_FLAG_INDEX, previous_epoch, index.ValidatorIndex):
inactivity_score -= min(1'u64, inactivity_score)
else:
inactivity_score += cfg.INACTIVITY_SCORE_BIAS
# Decrease the inactivity score of all eligible validators during a
# leak-free epoch
if not_in_inactivity_leak:
inactivity_score -= min(INACTIVITY_SCORE_RECOVERY_RATE.uint64, inactivity_score)
inactivity_score
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#inactivity-scores
func process_inactivity_updates*(
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cfg: RuntimeConfig,
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state: var (altair.BeaconState | bellatrix.BeaconState |
capella.BeaconState | deneb.BeaconState | electra.BeaconState),
info: altair.EpochInfo) =
# Score updates based on previous epoch participation, skip genesis epoch
if get_current_epoch(state) == GENESIS_EPOCH:
return
let
finality_delay = get_finality_delay(state)
not_in_inactivity_leak = not is_in_inactivity_leak(finality_delay)
for index in 0'u64 ..< state.validators.lenu64:
let
pre_inactivity_score = state.inactivity_scores.asSeq()[index]
inactivity_score =
compute_inactivity_update(state, info, pre_inactivity_score)
speed up epoch processing 6x+ (#3089) * speed up epoch processing 6x+ This change above all helps contain long replay times on epoch change, reorg and deep history inspection via REST/RPC * most effective balances don't actually change due to MAX_EFFECTIVE_BALANCE * ditto for inactivity scores * avoid signature check for trusted sync aggregates pre: ``` ./ncli_db --db:mainnet_0/db bench --start-slot=-3200 All time are ms Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3468.621, 0.000, 3468.621, 3468.621, 1, Initialize DB 0.357, 0.938, 0.171, 52.752, 3155, Load block from database 15691.471, 0.000, 15691.471, 15691.471, 1, Load state from database 6.100, 9.469, 0.033, 526.816, 3101, Advance slot, non-epoch 579.131, 9.523, 566.936, 610.328, 100, Advance slot, epoch 18.551, 16.317, 12.664, 136.668, 3155, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database load 0.000, 0.000, 0.000, 0.000, 0, Database store ``` post: ``` Average, StdDev, Min, Max, Samples, Test Validation is turned off meaning that no BLS operations are performed 3488.541, 0.000, 3488.541, 3488.541, 1, Initialize DB 0.369, 1.123, 0.183, 63.208, 3155, Load block from database 13430.642, 0.000, 13430.642, 13430.642, 1, Load state from database 6.522, 1.721, 0.034, 36.708, 3101, Advance slot, non-epoch 89.074, 3.162, 83.573, 101.436, 100, Advance slot, epoch 18.325, 18.346, 13.005, 145.040, 3155, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database load 0.000, 0.000, 0.000, 0.000, 0, Database store ``` * Update beacon_chain/spec/state_transition_block.nim Co-authored-by: zah <zahary@gmail.com> * avoid copying validator data in accessor ``` 5291.227, 0.000, 5291.227, 5291.227, 1, Initialize DB 0.436, 0.928, 0.138, 51.438, 3155, Load block from database 11962.826, 0.000, 11962.826, 11962.826, 1, Load state from database 6.477, 1.675, 0.037, 34.174, 3101, Advance slot, non-epoch 76.633, 3.705, 71.106, 98.085, 100, Advance slot, epoch 18.301, 18.593, 13.208, 149.153, 3155, Apply block, no slot processing 0.000, 0.000, 0.000, 0.000, 0, Database load 0.000, 0.000, 0.000, 0.000, 0, Database store ``` * work around compiler bug Co-authored-by: zah <zahary@gmail.com>
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# Most inactivity scores remain at 0 - avoid invalidating cache
if pre_inactivity_score != inactivity_score:
state.inactivity_scores[index] = inactivity_score
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/capella/beacon-chain.md#historical-summaries-updates
func process_historical_summaries_update*(
state: var (capella.BeaconState | deneb.BeaconState | electra.BeaconState)):
Result[void, cstring] =
# Set historical block root accumulator.
let next_epoch = get_current_epoch(state) + 1
if next_epoch mod (SLOTS_PER_HISTORICAL_ROOT div SLOTS_PER_EPOCH) == 0:
let historical_summary = HistoricalSummary(
block_summary_root: hash_tree_root(state.block_roots),
state_summary_root: hash_tree_root(state.state_roots),
)
if not state.historical_summaries.add(historical_summary):
return err("process_historical_summaries_update: state.historical_summaries full")
ok()
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#epoch-processing
proc process_epoch*(
Implement split preset/config support (#2710) * Implement split preset/config support This is the initial bulk refactor to introduce runtime config values in a number of places, somewhat replacing the existing mechanism of loading network metadata. It still needs more work, this is the initial refactor that introduces runtime configuration in some of the places that need it. The PR changes the way presets and constants work, to match the spec. In particular, a "preset" now refers to the compile-time configuration while a "cfg" or "RuntimeConfig" is the dynamic part. A single binary can support either mainnet or minimal, but not both. Support for other presets has been removed completely (can be readded, in case there's need). There's a number of outstanding tasks: * `SECONDS_PER_SLOT` still needs fixing * loading custom runtime configs needs redoing * checking constants against YAML file * yeerongpilly support `build/nimbus_beacon_node --network=yeerongpilly --discv5:no --log-level=DEBUG` * load fork epoch from config * fix fork digest sent in status * nicer error string for request failures * fix tools * one more * fixup * fixup * fixup * use "standard" network definition folder in local testnet Files are loaded from their standard locations, including genesis etc, to conform to the format used in the `eth2-networks` repo. * fix launch scripts, allow unknown config values * fix base config of rest test * cleanups * bundle mainnet config using common loader * fix spec links and names * only include supported preset in binary * drop yeerongpilly, add altair-devnet-0, support boot_enr.yaml
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cfg: RuntimeConfig, state: var phase0.BeaconState, flags: UpdateFlags,
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cache: var StateCache, info: var phase0.EpochInfo): Result[void, cstring] =
let epoch = get_current_epoch(state)
trace "process_epoch", epoch
info.init(state)
info.process_attestations(state, cache)
process_justification_and_finalization(state, info.balances, flags)
# state.slot hasn't been incremented yet.
if strictVerification in flags and epoch >= 2:
doAssert state.current_justified_checkpoint.epoch + 2 >= epoch
if strictVerification in flags and epoch >= 3:
# Rule 2/3/4 finalization results in the most pessimal case. The other
# three finalization rules finalize more quickly as long as the any of
# the finalization rules triggered.
doAssert state.finalized_checkpoint.epoch + 3 >= epoch
process_rewards_and_penalties(state, info)
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? process_registry_updates(cfg, state, cache)
process_slashings(state, info.balances.current_epoch)
process_eth1_data_reset(state)
process_effective_balance_updates(state)
process_slashings_reset(state)
process_randao_mixes_reset(state)
process_historical_roots_update(state)
process_participation_record_updates(state)
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ok()
func init*(
info: var altair.EpochInfo,
state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
deneb.BeaconState | electra.BeaconState) =
# init participation, overwriting the full structure
info.balances = get_unslashed_participating_balances(state)
info.validators.setLen(state.validators.len())
let previous_epoch = get_previous_epoch(state)
for index in 0..<state.validators.len():
var flags: set[ParticipationFlag]
if is_eligible_validator(state.validators[index], previous_epoch):
flags.incl ParticipationFlag.eligible
info.validators[index] = ParticipationInfo(
flags: flags
)
func init*(
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T: type altair.EpochInfo,
state: altair.BeaconState | bellatrix.BeaconState | capella.BeaconState |
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deneb.BeaconState): T =
init(result, state)
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#epoch-processing
proc process_epoch*(
cfg: RuntimeConfig,
state: var (altair.BeaconState | bellatrix.BeaconState),
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flags: UpdateFlags, cache: var StateCache, info: var altair.EpochInfo):
Result[void, cstring] =
let epoch = get_current_epoch(state)
trace "process_epoch", epoch
info.init(state)
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#justification-and-finalization
# [Modified in Altair]
process_justification_and_finalization(state, info.balances, flags)
# state.slot hasn't been incremented yet.
if strictVerification in flags and epoch >= 2:
doAssert state.current_justified_checkpoint.epoch + 2 >= epoch
if strictVerification in flags and epoch >= 3:
# Rule 2/3/4 finalization results in the most pessimal case. The other
# three finalization rules finalize more quickly as long as the any of
# the finalization rules triggered.
doAssert state.finalized_checkpoint.epoch + 3 >= epoch
process_inactivity_updates(cfg, state, info) # [New in Altair]
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#rewards-and-penalties
process_rewards_and_penalties(cfg, state, info) # [Modified in Altair]
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#registry-updates
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? process_registry_updates(cfg, state, cache)
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#slashings
process_slashings(state, info.balances.current_epoch) # [Modified in Altair]
process_eth1_data_reset(state)
process_effective_balance_updates(state)
process_slashings_reset(state)
process_randao_mixes_reset(state)
process_historical_roots_update(state)
process_participation_flag_updates(state) # [New in Altair]
process_sync_committee_updates(state) # [New in Altair]
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ok()
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/capella/beacon-chain.md#epoch-processing
proc process_epoch*(
cfg: RuntimeConfig,
state: var (capella.BeaconState | deneb.BeaconState | electra.BeaconState),
flags: UpdateFlags, cache: var StateCache, info: var altair.EpochInfo):
Result[void, cstring] =
let epoch = get_current_epoch(state)
trace "process_epoch", epoch
info.init(state)
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#justification-and-finalization
process_justification_and_finalization(state, info.balances, flags)
# state.slot hasn't been incremented yet.
if strictVerification in flags:
# Rule 2/3/4 finalization results in the most pessimal case. The other
# three finalization rules finalize more quickly as long as the any of
# the finalization rules triggered.
if (epoch >= 2 and state.current_justified_checkpoint.epoch + 2 < epoch) or
(epoch >= 3 and state.finalized_checkpoint.epoch + 3 < epoch):
fatal "The network did not finalize",
epoch, finalizedEpoch = state.finalized_checkpoint.epoch
quit 1
process_inactivity_updates(cfg, state, info)
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#rewards-and-penalties
process_rewards_and_penalties(cfg, state, info)
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.6/specs/phase0/beacon-chain.md#registry-updates
? process_registry_updates(cfg, state, cache)
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.7/specs/altair/beacon-chain.md#slashings
process_slashings(state, info.balances.current_epoch)
process_eth1_data_reset(state)
process_effective_balance_updates(state)
process_slashings_reset(state)
process_randao_mixes_reset(state)
? process_historical_summaries_update(state) # [Modified in Capella]
process_participation_flag_updates(state)
process_sync_committee_updates(state)
ok()