209 lines
8.9 KiB
Nim
209 lines
8.9 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.
|
|
|
|
when (NimMajor, NimMinor) < (1, 4):
|
|
{.push raises: [Defect].}
|
|
else:
|
|
{.push raises: [].}
|
|
|
|
import
|
|
"."/[helpers, forks],
|
|
"."/datatypes/base
|
|
|
|
export base
|
|
|
|
const
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.2/specs/phase0/p2p-interface.md#topics-and-messages
|
|
topicBeaconBlocksSuffix* = "beacon_block/ssz_snappy"
|
|
topicVoluntaryExitsSuffix* = "voluntary_exit/ssz_snappy"
|
|
topicProposerSlashingsSuffix* = "proposer_slashing/ssz_snappy"
|
|
topicAttesterSlashingsSuffix* = "attester_slashing/ssz_snappy"
|
|
topicAggregateAndProofsSuffix* = "beacon_aggregate_and_proof/ssz_snappy"
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.2/specs/phase0/p2p-interface.md#configuration
|
|
MAX_CHUNK_SIZE* = 1 * 1024 * 1024 # bytes
|
|
GOSSIP_MAX_SIZE* = 1 * 1024 * 1024 # bytes
|
|
TTFB_TIMEOUT* = 5.seconds
|
|
RESP_TIMEOUT* = 10.seconds
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.2/specs/bellatrix/p2p-interface.md#configuration
|
|
GOSSIP_MAX_SIZE_BELLATRIX* = 10 * 1024 * 1024 # bytes
|
|
MAX_CHUNK_SIZE_BELLATRIX* = 10 * 1024 * 1024 # bytes
|
|
|
|
defaultEth2TcpPort* = 9000
|
|
defaultEth2TcpPortDesc* = $defaultEth2TcpPort
|
|
|
|
# This is not part of the spec! But its port which uses Lighthouse
|
|
defaultEth2RestPort* = 5052
|
|
defaultEth2RestPortDesc* = $defaultEth2RestPort
|
|
|
|
enrAttestationSubnetsField* = "attnets"
|
|
enrSyncSubnetsField* = "syncnets"
|
|
enrForkIdField* = "eth2"
|
|
|
|
template eth2Prefix(forkDigest: ForkDigest): string =
|
|
"/eth2/" & $forkDigest & "/"
|
|
|
|
func getBeaconBlocksTopic*(forkDigest: ForkDigest): string =
|
|
eth2Prefix(forkDigest) & topicBeaconBlocksSuffix
|
|
|
|
func getVoluntaryExitsTopic*(forkDigest: ForkDigest): string =
|
|
eth2Prefix(forkDigest) & topicVoluntaryExitsSuffix
|
|
|
|
func getProposerSlashingsTopic*(forkDigest: ForkDigest): string =
|
|
eth2Prefix(forkDigest) & topicProposerSlashingsSuffix
|
|
|
|
func getAttesterSlashingsTopic*(forkDigest: ForkDigest): string =
|
|
eth2Prefix(forkDigest) & topicAttesterSlashingsSuffix
|
|
|
|
func getAggregateAndProofsTopic*(forkDigest: ForkDigest): string =
|
|
eth2Prefix(forkDigest) & topicAggregateAndProofsSuffix
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.1/specs/phase0/validator.md#broadcast-attestation
|
|
func compute_subnet_for_attestation*(
|
|
committees_per_slot: uint64, slot: Slot, committee_index: CommitteeIndex):
|
|
SubnetId =
|
|
# Compute the correct subnet for an attestation for Phase 0.
|
|
# Note, this mimics expected Phase 1 behavior where attestations will be
|
|
# mapped to their shard subnet.
|
|
let
|
|
slots_since_epoch_start = slot.since_epoch_start()
|
|
committees_since_epoch_start =
|
|
committees_per_slot * slots_since_epoch_start
|
|
|
|
SubnetId(
|
|
(committees_since_epoch_start + committee_index.asUInt64) mod
|
|
ATTESTATION_SUBNET_COUNT)
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.1/specs/phase0/validator.md#broadcast-attestation
|
|
func getAttestationTopic*(forkDigest: ForkDigest,
|
|
subnetId: SubnetId): string =
|
|
## For subscribing and unsubscribing to/from a subnet.
|
|
eth2Prefix(forkDigest) & "beacon_attestation_" & $(subnetId) & "/ssz_snappy"
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.2/specs/altair/p2p-interface.md#topics-and-messages
|
|
func getSyncCommitteeTopic*(forkDigest: ForkDigest,
|
|
subcommitteeIdx: SyncSubcommitteeIndex): string =
|
|
## For subscribing and unsubscribing to/from a subnet.
|
|
eth2Prefix(forkDigest) & "sync_committee_" & $subcommitteeIdx & "/ssz_snappy"
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.2/specs/altair/p2p-interface.md#topics-and-messages
|
|
func getSyncCommitteeContributionAndProofTopic*(forkDigest: ForkDigest): string =
|
|
## For subscribing and unsubscribing to/from a subnet.
|
|
eth2Prefix(forkDigest) & "sync_committee_contribution_and_proof/ssz_snappy"
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.2/specs/altair/light-client/p2p-interface.md#light_client_finality_update
|
|
func getLightClientFinalityUpdateTopic*(forkDigest: ForkDigest): string =
|
|
## For broadcasting or obtaining the latest `LightClientFinalityUpdate`.
|
|
eth2Prefix(forkDigest) & "light_client_finality_update/ssz_snappy"
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.2/specs/altair/light-client/p2p-interface.md#light_client_optimistic_update
|
|
func getLightClientOptimisticUpdateTopic*(forkDigest: ForkDigest): string =
|
|
## For broadcasting or obtaining the latest `LightClientOptimisticUpdate`.
|
|
eth2Prefix(forkDigest) & "light_client_optimistic_update/ssz_snappy"
|
|
|
|
func getENRForkID*(cfg: RuntimeConfig,
|
|
epoch: Epoch,
|
|
genesis_validators_root: Eth2Digest): ENRForkID =
|
|
let
|
|
current_fork_version = cfg.forkVersionAtEpoch(epoch)
|
|
next_fork_version = if cfg.nextForkEpochAtEpoch(epoch) == FAR_FUTURE_EPOCH:
|
|
current_fork_version
|
|
else:
|
|
cfg.forkVersionAtEpoch(cfg.nextForkEpochAtEpoch(epoch))
|
|
fork_digest = compute_fork_digest(current_fork_version,
|
|
genesis_validators_root)
|
|
ENRForkID(
|
|
fork_digest: fork_digest,
|
|
next_fork_version: next_fork_version,
|
|
next_fork_epoch: cfg.nextForkEpochAtEpoch(epoch))
|
|
|
|
func getDiscoveryForkID*(cfg: RuntimeConfig,
|
|
epoch: Epoch,
|
|
genesis_validators_root: Eth2Digest): ENRForkID =
|
|
# Until 1 epoch from fork, returns pre-fork value
|
|
if epoch + 1 >= cfg.ALTAIR_FORK_EPOCH:
|
|
getENRForkID(cfg, epoch, genesis_validators_root)
|
|
else:
|
|
let
|
|
current_fork_version = cfg.forkVersionAtEpoch(epoch)
|
|
fork_digest = compute_fork_digest(current_fork_version,
|
|
genesis_validators_root)
|
|
ENRForkID(
|
|
fork_digest: fork_digest,
|
|
next_fork_version: current_fork_version,
|
|
next_fork_epoch: FAR_FUTURE_EPOCH)
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.2/specs/altair/p2p-interface.md#transitioning-the-gossip
|
|
type GossipState* = set[BeaconStateFork]
|
|
func getTargetGossipState*(
|
|
epoch, ALTAIR_FORK_EPOCH, BELLATRIX_FORK_EPOCH: Epoch, isBehind: bool):
|
|
GossipState =
|
|
if isBehind:
|
|
{}
|
|
|
|
# The order of these checks doesn't matter.
|
|
elif epoch >= BELLATRIX_FORK_EPOCH:
|
|
{BeaconStateFork.Bellatrix}
|
|
elif epoch + 1 < ALTAIR_FORK_EPOCH:
|
|
{BeaconStateFork.Phase0}
|
|
|
|
# Order remaining checks so ALTAIR_FORK_EPOCH == BELLATRIX_FORK_EPOCH works
|
|
# and when the transition zones align contiguously, or are separated by
|
|
# intermediate pure-Altair epochs.
|
|
#
|
|
# In the first case, should never enable Altair, and there's also never
|
|
# a Phase -> Altair, or Altair -> Bellatrix gossip transition epoch. In
|
|
# contiguous Phase0 -> Altair and Altair -> Bellatrix transitions, that
|
|
# pure Altair state gossip state never occurs, but it works without any
|
|
# special cases so long as one checks for transition-to-fork+1 before a
|
|
# pure fork gossip state.
|
|
#
|
|
# Therefore, check for transition-to-merge before pure-Altair.
|
|
elif epoch + 1 >= BELLATRIX_FORK_EPOCH:
|
|
# As there are only two fork epochs and there's no transition to phase0
|
|
{if ALTAIR_FORK_EPOCH == BELLATRIX_FORK_EPOCH:
|
|
BeaconStateFork.Phase0
|
|
else:
|
|
BeaconStateFork.Altair,
|
|
BeaconStateFork.Bellatrix}
|
|
elif epoch >= ALTAIR_FORK_EPOCH:
|
|
{BeaconStateFork.Altair}
|
|
|
|
# Must be after the case which catches phase0 => merge
|
|
elif epoch + 1 >= ALTAIR_FORK_EPOCH:
|
|
{BeaconStateFork.Phase0, BeaconStateFork.Altair}
|
|
else:
|
|
raiseAssert "Unknown target gossip state"
|
|
|
|
func nearSyncCommitteePeriod*(epoch: Epoch): Option[uint64] =
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.1/specs/altair/validator.md#sync-committee-subnet-stability
|
|
if epoch.is_sync_committee_period():
|
|
return some 0'u64
|
|
let epochsBefore =
|
|
EPOCHS_PER_SYNC_COMMITTEE_PERIOD - epoch.since_sync_committee_period_start()
|
|
if epoch.is_sync_committee_period() or epochsBefore <= SYNC_COMMITTEE_SUBNET_COUNT:
|
|
return some epochsBefore
|
|
|
|
none(uint64)
|
|
|
|
func getSyncSubnets*(
|
|
nodeHasPubkey: proc(pubkey: ValidatorPubKey):
|
|
bool {.noSideEffect, raises: [Defect].},
|
|
syncCommittee: SyncCommittee): SyncnetBits =
|
|
var res: SyncnetBits
|
|
for i, pubkey in syncCommittee.pubkeys:
|
|
if not nodeHasPubkey(pubkey):
|
|
continue
|
|
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.1/specs/altair/validator.md#broadcast-sync-committee-message
|
|
# The first quarter of the pubkeys map to subnet 0, the second quarter to
|
|
# subnet 1, the third quarter to subnet 2 and the final quarter to subnet
|
|
# 3.
|
|
res.setBit(i div (SYNC_COMMITTEE_SIZE div SYNC_COMMITTEE_SUBNET_COUNT))
|
|
res
|