nimbus-eth2/beacon_chain/nimbus_beacon_node.nim

1889 lines
69 KiB
Nim

# Copyright (c) 2018-2021 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
{.push raises: [Defect].}
import
# Standard library
std/[math, os, osproc, random, sequtils, strformat, strutils,
tables, times, terminal],
# Nimble packages
stew/io2,
spec/eth2_apis/eth2_rest_serialization,
stew/[objects, byteutils, endians2, io2], stew/shims/macros,
chronos, confutils, metrics, metrics/chronos_httpserver,
chronicles, bearssl, blscurve, presto,
json_serialization/std/[options, sets, net], serialization/errors,
taskpools,
eth/keys, eth/net/nat,
eth/p2p/discoveryv5/[protocol, enr, random2],
# Local modules
"."/[
beacon_clock, beacon_chain_db, beacon_node, beacon_node_status,
conf, filepath, interop, nimbus_binary_common, statusbar,
version],
./networking/[eth2_discovery, eth2_network, network_metadata],
./gossip_processing/[eth2_processor, block_processor, consensus_manager],
./validators/[
validator_duties, validator_pool,
slashing_protection, keystore_management],
./sync/[sync_manager, sync_protocol, request_manager],
./rpc/[rest_api, rpc_api],
./spec/datatypes/[altair, merge, phase0],
./spec/eth2_apis/rpc_beacon_client,
./spec/[
beaconstate, forks, helpers, network, weak_subjectivity, signatures,
validator],
./consensus_object_pools/[
blockchain_dag, block_quarantine, block_clearance, attestation_pool,
sync_committee_msg_pool, exit_pool, spec_cache],
./eth1/eth1_monitor
from eth/common/eth_types import BlockHashOrNumber
when defined(posix):
import system/ansi_c
from
libp2p/protocols/pubsub/gossipsub
import
TopicParams, validateParameters, init
type
RpcServer* = RpcHttpServer
template init(T: type RpcHttpServer, ip: ValidIpAddress, port: Port): T =
newRpcHttpServer([initTAddress(ip, port)])
template init(T: type RestServerRef, ip: ValidIpAddress, port: Port): T =
let address = initTAddress(ip, port)
let serverFlags = {HttpServerFlags.QueryCommaSeparatedArray,
HttpServerFlags.NotifyDisconnect}
# We increase default timeout to help validator clients who poll our server
# at least once per slot (12.seconds).
let
headersTimeout = seconds(2'i64 * int64(SECONDS_PER_SLOT))
maxHeadersSize = 65536 # 64 kilobytes
maxRequestBodySize = 16_777_216 # 16 megabytes
let res = RestServerRef.new(getRouter(), address, serverFlags = serverFlags,
httpHeadersTimeout = headersTimeout,
maxHeadersSize = maxHeadersSize,
maxRequestBodySize = maxRequestBodySize)
if res.isErr():
notice "Rest server could not be started", address = $address,
reason = res.error()
nil
else:
notice "Starting REST HTTP server",
url = "http://" & $ip & ":" & $port & "/"
res.get()
# https://github.com/ethereum/eth2.0-metrics/blob/master/metrics.md#interop-metrics
declareGauge beacon_slot, "Latest slot of the beacon chain state"
declareGauge beacon_current_epoch, "Current epoch"
# Finalization tracking
declareGauge finalization_delay,
"Epoch delay between scheduled epoch and finalized epoch"
declareGauge ticks_delay,
"How long does to take to run the onSecond loop"
declareGauge next_action_wait,
"Seconds until the next attestation will be sent"
declareGauge versionGauge, "Nimbus version info (as metric labels)", ["version", "commit"], name = "version"
versionGauge.set(1, labelValues=[fullVersionStr, gitRevision])
declareGauge network_name, "network name", ["name"]
logScope: topics = "beacnde"
const SlashingDbName = "slashing_protection"
# changing this requires physical file rename as well or history is lost.
func getBeaconTimeFn(clock: BeaconClock): GetBeaconTimeFn =
return proc(): BeaconTime = clock.now()
proc init*(T: type BeaconNode,
cfg: RuntimeConfig,
rng: ref BrHmacDrbgContext,
config: BeaconNodeConf,
depositContractDeployedAt: BlockHashOrNumber,
eth1Network: Option[Eth1Network],
genesisStateContents: string,
genesisDepositsSnapshotContents: string): BeaconNode {.
raises: [Defect, CatchableError].} =
var taskpool: TaskpoolPtr
try:
if config.numThreads < 0:
fatal "The number of threads --numThreads cannot be negative."
quit 1
elif config.numThreads == 0:
taskpool = TaskpoolPtr.new()
else:
taskpool = TaskpoolPtr.new(numThreads = config.numThreads)
info "Threadpool started", numThreads = taskpool.numThreads
except Exception as exc:
raise newException(Defect, "Failure in taskpool initialization.")
let
eventBus = newAsyncEventBus()
db = BeaconChainDB.new(config.databaseDir, inMemory = false)
var
genesisState, checkpointState: ref ForkedHashedBeaconState
checkpointBlock: ForkedTrustedSignedBeaconBlock
proc onAttestationReceived(data: Attestation) =
eventBus.emit("attestation-received", data)
proc onAttestationSent(data: Attestation) =
eventBus.emit("attestation-sent", data)
proc onVoluntaryExitAdded(data: SignedVoluntaryExit) =
eventBus.emit("voluntary-exit", data)
proc onBlockAdded(data: ForkedTrustedSignedBeaconBlock) =
eventBus.emit("signed-beacon-block", data)
proc onHeadChanged(data: HeadChangeInfoObject) =
eventBus.emit("head-change", data)
proc onChainReorg(data: ReorgInfoObject) =
eventBus.emit("chain-reorg", data)
proc onFinalization(data: FinalizationInfoObject) =
eventBus.emit("finalization", data)
proc onSyncContribution(data: SignedContributionAndProof) =
eventBus.emit("sync-contribution-and-proof", data)
if config.finalizedCheckpointState.isSome:
let checkpointStatePath = config.finalizedCheckpointState.get.string
checkpointState = try:
newClone(readSszForkedHashedBeaconState(
cfg, readAllBytes(checkpointStatePath).tryGet()))
except SszError as err:
fatal "Checkpoint state deserialization failed",
err = formatMsg(err, checkpointStatePath)
quit 1
except CatchableError as err:
fatal "Failed to read checkpoint state file", err = err.msg
quit 1
if config.finalizedCheckpointBlock.isNone:
if getStateField(checkpointState[], slot) > 0:
fatal "Specifying a non-genesis --finalized-checkpoint-state requires specifying --finalized-checkpoint-block as well"
quit 1
else:
let checkpointBlockPath = config.finalizedCheckpointBlock.get.string
try:
# Checkpoint block might come from an earlier fork than the state with
# the state having empty slots processed past the fork epoch.
checkpointBlock = readSszForkedTrustedSignedBeaconBlock(
cfg, readAllBytes(checkpointBlockPath).tryGet())
except SszError as err:
fatal "Invalid checkpoint block", err = err.formatMsg(checkpointBlockPath)
quit 1
except IOError as err:
fatal "Failed to load the checkpoint block", err = err.msg
quit 1
elif config.finalizedCheckpointBlock.isSome:
# TODO We can download the state from somewhere in the future relying
# on the trusted `state_root` appearing in the checkpoint block.
fatal "--finalized-checkpoint-block cannot be specified without --finalized-checkpoint-state"
quit 1
var eth1Monitor: Eth1Monitor
if not ChainDAGRef.isInitialized(db):
var
tailState: ref ForkedHashedBeaconState
tailBlock: ForkedTrustedSignedBeaconBlock
if genesisStateContents.len == 0 and checkpointState == nil:
when hasGenesisDetection:
if genesisDepositsSnapshotContents != nil:
fatal "A deposits snapshot cannot be provided without also providing a matching beacon state snapshot"
quit 1
# This is a fresh start without a known genesis state
# (most likely, it hasn't arrived yet). We'll try to
# obtain a genesis through the Eth1 deposits monitor:
if config.web3Urls.len == 0:
fatal "Web3 URL not specified"
quit 1
# TODO Could move this to a separate "GenesisMonitor" process or task
# that would do only this - see Paul's proposal for this.
let eth1MonitorRes = waitFor Eth1Monitor.init(
cfg,
db,
config.web3Urls,
depositContractDeployedAt,
eth1Network,
config.web3ForcePolling)
if eth1MonitorRes.isErr:
fatal "Failed to start Eth1 monitor",
reason = eth1MonitorRes.error,
web3Urls = config.web3Urls,
depositContractDeployedAt
quit 1
else:
eth1Monitor = eth1MonitorRes.get
genesisState = waitFor eth1Monitor.waitGenesis()
if bnStatus == BeaconNodeStatus.Stopping:
return nil
tailState = genesisState
tailBlock = get_initial_beacon_block(genesisState[])
notice "Eth2 genesis state detected",
genesisTime = genesisState.genesisTime,
eth1Block = genesisState.eth1_data.block_hash,
totalDeposits = genesisState.eth1_data.deposit_count
else:
fatal "No database and no genesis snapshot found: supply a genesis.ssz " &
"with the network configuration, or compile the beacon node with " &
"the -d:has_genesis_detection option " &
"in order to support monitoring for genesis events"
quit 1
elif genesisStateContents.len == 0:
if getStateField(checkpointState[], slot) == GENESIS_SLOT:
genesisState = checkpointState
tailState = checkpointState
tailBlock = get_initial_beacon_block(genesisState[])
else:
fatal "State checkpoints cannot be provided for a network without a known genesis state"
quit 1
else:
try:
genesisState = newClone(readSszForkedHashedBeaconState(
cfg,
genesisStateContents.toOpenArrayByte(0, genesisStateContents.high())))
except CatchableError as err:
raiseAssert "Invalid baked-in state: " & err.msg
if not checkpointState.isNil:
tailState = checkpointState
tailBlock = checkpointBlock
else:
tailState = genesisState
tailBlock = get_initial_beacon_block(genesisState[])
try:
ChainDAGRef.preInit(db, genesisState[], tailState[], tailBlock)
doAssert ChainDAGRef.isInitialized(db), "preInit should have initialized db"
except CatchableError as exc:
error "Failed to initialize database", err = exc.msg
quit 1
else:
if not checkpointState.isNil:
fatal "A database already exists, cannot start from given checkpoint",
dataDir = config.dataDir
quit 1
# Doesn't use std/random directly, but dependencies might
randomize(rng[].rand(high(int)))
info "Loading block dag from database", path = config.databaseDir
let
chainDagFlags = if config.verifyFinalization: {verifyFinalization}
else: {}
dag = ChainDAGRef.init(cfg, db, chainDagFlags, onBlockAdded, onHeadChanged,
onChainReorg, onFinalization)
quarantine = newClone(Quarantine.init())
databaseGenesisValidatorsRoot =
getStateField(dag.headState.data, genesis_validators_root)
if genesisStateContents.len != 0:
let
networkGenesisValidatorsRoot =
extractGenesisValidatorRootFromSnapshop(genesisStateContents)
if networkGenesisValidatorsRoot != databaseGenesisValidatorsRoot:
fatal "The specified --data-dir contains data for a different network",
networkGenesisValidatorsRoot, databaseGenesisValidatorsRoot,
dataDir = config.dataDir
quit 1
let beaconClock = BeaconClock.init(
getStateField(dag.headState.data, genesis_time))
if config.weakSubjectivityCheckpoint.isSome:
let
currentSlot = beaconClock.now.slotOrZero
isCheckpointStale = not is_within_weak_subjectivity_period(
cfg,
currentSlot,
dag.headState.data,
config.weakSubjectivityCheckpoint.get)
if isCheckpointStale:
error "Weak subjectivity checkpoint is stale",
currentSlot,
checkpoint = config.weakSubjectivityCheckpoint.get,
headStateSlot = getStateField(dag.headState.data, slot)
quit 1
if eth1Monitor.isNil and
config.web3Urls.len > 0 and
genesisDepositsSnapshotContents.len > 0:
let genesisDepositsSnapshot = SSZ.decode(genesisDepositsSnapshotContents,
DepositContractSnapshot)
eth1Monitor = Eth1Monitor.init(
cfg,
db,
config.web3Urls,
genesisDepositsSnapshot,
eth1Network,
config.web3ForcePolling)
let rpcServer = if config.rpcEnabled:
RpcServer.init(config.rpcAddress, config.rpcPort)
else:
nil
let restServer = if config.restEnabled:
RestServerRef.init(config.restAddress, config.restPort)
else:
nil
let
netKeys = getPersistentNetKeys(rng[], config)
nickname = if config.nodeName == "auto": shortForm(netKeys)
else: config.nodeName
getBeaconTime = beaconClock.getBeaconTimeFn()
network = createEth2Node(
rng, config, netKeys, cfg, dag.forkDigests, getBeaconTime,
getStateField(dag.headState.data, genesis_validators_root))
attestationPool = newClone(
AttestationPool.init(dag, quarantine, onAttestationReceived)
)
syncCommitteeMsgPool = newClone(
SyncCommitteeMsgPool.init(onSyncContribution)
)
exitPool = newClone(ExitPool.init(dag, onVoluntaryExitAdded))
case config.slashingDbKind
of SlashingDbKind.v2:
discard
of SlashingDbKind.v1:
error "Slashing DB v1 is no longer supported for writing"
quit 1
of SlashingDbKind.both:
warn "Slashing DB v1 deprecated, writing only v2"
info "Loading slashing protection database (v2)",
path = config.validatorsDir()
func getLocalHeadSlot(): Slot =
dag.head.slot
proc getLocalWallSlot(): Slot =
beaconClock.now.slotOrZero
func getFirstSlotAtFinalizedEpoch(): Slot =
dag.finalizedHead.slot
let
slashingProtectionDB =
SlashingProtectionDB.init(
getStateField(dag.headState.data, genesis_validators_root),
config.validatorsDir(), SlashingDbName)
validatorPool = newClone(ValidatorPool.init(slashingProtectionDB))
consensusManager = ConsensusManager.new(
dag, attestationPool, quarantine
)
blockProcessor = BlockProcessor.new(
config.dumpEnabled, config.dumpDirInvalid, config.dumpDirIncoming,
rng, taskpool, consensusManager, getBeaconTime)
processor = Eth2Processor.new(
config.doppelgangerDetection,
blockProcessor, dag, attestationPool, exitPool, validatorPool,
syncCommitteeMsgPool, quarantine, rng, getBeaconTime, taskpool)
syncManager = newSyncManager[Peer, PeerID](
network.peerPool, getLocalHeadSlot, getLocalWallSlot,
getFirstSlotAtFinalizedEpoch, blockProcessor, chunkSize = 32)
var node = BeaconNode(
nickname: nickname,
graffitiBytes: if config.graffiti.isSome: config.graffiti.get.GraffitiBytes
else: defaultGraffitiBytes(),
network: network,
netKeys: netKeys,
db: db,
config: config,
attachedValidators: validatorPool,
dag: dag,
quarantine: quarantine,
attestationPool: attestationPool,
syncCommitteeMsgPool: syncCommitteeMsgPool,
exitPool: exitPool,
eth1Monitor: eth1Monitor,
rpcServer: rpcServer,
restServer: restServer,
eventBus: eventBus,
requestManager: RequestManager.init(network, blockProcessor),
syncManager: syncManager,
actionTracker: ActionTracker.init(rng, config.subscribeAllSubnets),
processor: processor,
blockProcessor: blockProcessor,
consensusManager: consensusManager,
gossipState: GossipState.Disconnected,
beaconClock: beaconClock,
onAttestationSent: onAttestationSent,
)
node.addValidators()
block:
# Add in-process validators to the list of "known" validators such that
# we start with a reasonable ENR
let wallSlot = node.beaconClock.now().slotOrZero()
for validator in node.attachedValidators[].validators.values():
if validator.index.isSome():
node.actionTracker.knownValidators[validator.index.get()] = wallSlot
let
stabilitySubnets = node.actionTracker.stabilitySubnets(wallSlot)
# Here, we also set the correct ENR should we be in all subnets mode!
node.network.updateStabilitySubnetMetadata(stabilitySubnets)
network.initBeaconSync(dag, getBeaconTime)
node.updateValidatorMetrics()
return node
func verifyFinalization(node: BeaconNode, slot: Slot) =
# Epoch must be >= 4 to check finalization
const SETTLING_TIME_OFFSET = 1'u64
let epoch = slot.compute_epoch_at_slot()
# Don't static-assert this -- if this isn't called, don't require it
doAssert SLOTS_PER_EPOCH > SETTLING_TIME_OFFSET
# Intentionally, loudly assert. Point is to fail visibly and unignorably
# during testing.
if epoch >= 4 and slot mod SLOTS_PER_EPOCH > SETTLING_TIME_OFFSET:
let finalizedEpoch =
node.dag.finalizedHead.slot.compute_epoch_at_slot()
# Finalization rule 234, that has the most lag slots among the cases, sets
# state.finalized_checkpoint = old_previous_justified_checkpoint.epoch + 3
# and then state.slot gets incremented, to increase the maximum offset, if
# finalization occurs every slot, to 4 slots vs scheduledSlot.
doAssert finalizedEpoch + 4 >= epoch
func subnetLog(v: BitArray): string =
$toSeq(v.oneIndices())
# https://github.com/ethereum/consensus-specs/blob/v1.1.2/specs/phase0/validator.md#phase-0-attestation-subnet-stability
proc updateAttestationSubnetHandlers(node: BeaconNode, slot: Slot) =
if node.gossipState == GossipState.Disconnected:
# When disconnected, updateGossipState is responsible for all things
# subnets - in particular, it will remove subscriptions on the edge where
# we enter the disconnected state.
return
let
aggregateSubnets = node.actionTracker.aggregateSubnets(slot)
stabilitySubnets = node.actionTracker.stabilitySubnets(slot)
subnets = aggregateSubnets + stabilitySubnets
node.network.updateStabilitySubnetMetadata(stabilitySubnets)
# Now we know what we should be subscribed to - make it so
let
prevSubnets = node.actionTracker.subscribedSubnets
unsubscribeSubnets = prevSubnets - subnets
subscribeSubnets = subnets - prevSubnets
# Remember what we subscribed to, so we can unsubscribe later
node.actionTracker.subscribedSubnets = subnets
case node.gossipState
of GossipState.Disconnected:
raiseAssert "Checked above"
of GossipState.ConnectedToPhase0:
node.network.unsubscribeAttestationSubnets(unsubscribeSubnets, node.dag.forkDigests.phase0)
node.network.subscribeAttestationSubnets(subscribeSubnets, node.dag.forkDigests.phase0)
of GossipState.InTransitionToAltair:
node.network.unsubscribeAttestationSubnets(unsubscribeSubnets, node.dag.forkDigests.phase0)
node.network.unsubscribeAttestationSubnets(unsubscribeSubnets, node.dag.forkDigests.altair)
node.network.subscribeAttestationSubnets(subscribeSubnets, node.dag.forkDigests.phase0)
node.network.subscribeAttestationSubnets(subscribeSubnets, node.dag.forkDigests.altair)
of GossipState.ConnectedToAltair:
node.network.unsubscribeAttestationSubnets(unsubscribeSubnets, node.dag.forkDigests.altair)
node.network.subscribeAttestationSubnets(subscribeSubnets, node.dag.forkDigests.altair)
debug "Attestation subnets",
slot, epoch = slot.epoch, gossipState = node.gossipState,
stabilitySubnets = subnetLog(stabilitySubnets),
aggregateSubnets = subnetLog(aggregateSubnets),
prevSubnets = subnetLog(prevSubnets),
subscribeSubnets = subnetLog(subscribeSubnets),
unsubscribeSubnets = subnetLog(unsubscribeSubnets)
# inspired by lighthouse research here
# https://gist.github.com/blacktemplar/5c1862cb3f0e32a1a7fb0b25e79e6e2c#file-generate-scoring-params-py
const
blocksTopicParams = TopicParams(
topicWeight: 0.5,
timeInMeshWeight: 0.03333333333333333,
timeInMeshQuantum: chronos.seconds(12),
timeInMeshCap: 300,
firstMessageDeliveriesWeight: 1.1471603557060206,
firstMessageDeliveriesDecay: 0.9928302477768374,
firstMessageDeliveriesCap: 34.86870846001471,
meshMessageDeliveriesWeight: -458.31054878249114,
meshMessageDeliveriesDecay: 0.9716279515771061,
meshMessageDeliveriesThreshold: 0.6849191409056553,
meshMessageDeliveriesCap: 2.054757422716966,
meshMessageDeliveriesActivation: chronos.seconds(384),
meshMessageDeliveriesWindow: chronos.seconds(2),
meshFailurePenaltyWeight: -458.31054878249114 ,
meshFailurePenaltyDecay: 0.9716279515771061,
invalidMessageDeliveriesWeight: -214.99999999999994,
invalidMessageDeliveriesDecay: 0.9971259067705325
)
aggregateTopicParams = TopicParams(
topicWeight: 0.5,
timeInMeshWeight: 0.03333333333333333,
timeInMeshQuantum: chronos.seconds(12),
timeInMeshCap: 300,
firstMessageDeliveriesWeight: 0.10764904539552399,
firstMessageDeliveriesDecay: 0.8659643233600653,
firstMessageDeliveriesCap: 371.5778421725158,
meshMessageDeliveriesWeight: -0.07538533073670682,
meshMessageDeliveriesDecay: 0.930572040929699,
meshMessageDeliveriesThreshold: 53.404248450179836,
meshMessageDeliveriesCap: 213.61699380071934,
meshMessageDeliveriesActivation: chronos.seconds(384),
meshMessageDeliveriesWindow: chronos.seconds(2),
meshFailurePenaltyWeight: -0.07538533073670682 ,
meshFailurePenaltyDecay: 0.930572040929699,
invalidMessageDeliveriesWeight: -214.99999999999994,
invalidMessageDeliveriesDecay: 0.9971259067705325
)
basicParams = TopicParams.init()
static:
# compile time validation
blocksTopicParams.validateParameters().tryGet()
aggregateTopicParams.validateParameters().tryGet()
basicParams.validateParameters.tryGet()
proc addPhase0MessageHandlers(node: BeaconNode, forkDigest: ForkDigest, slot: Slot) =
node.network.subscribe(getBeaconBlocksTopic(forkDigest), blocksTopicParams, enableTopicMetrics = true)
node.network.subscribe(getAttesterSlashingsTopic(forkDigest), basicParams)
node.network.subscribe(getProposerSlashingsTopic(forkDigest), basicParams)
node.network.subscribe(getVoluntaryExitsTopic(forkDigest), basicParams)
node.network.subscribe(getAggregateAndProofsTopic(forkDigest), aggregateTopicParams, enableTopicMetrics = true)
# updateAttestationSubnetHandlers subscribes attestation subnets
proc addPhase0MessageHandlers(node: BeaconNode, slot: Slot) =
addPhase0MessageHandlers(node, node.dag.forkDigests.phase0, slot)
proc removePhase0MessageHandlers(node: BeaconNode, forkDigest: ForkDigest) =
node.network.unsubscribe(getBeaconBlocksTopic(forkDigest))
node.network.unsubscribe(getVoluntaryExitsTopic(forkDigest))
node.network.unsubscribe(getProposerSlashingsTopic(forkDigest))
node.network.unsubscribe(getAttesterSlashingsTopic(forkDigest))
node.network.unsubscribe(getAggregateAndProofsTopic(forkDigest))
for subnet_id in 0'u64 ..< ATTESTATION_SUBNET_COUNT:
node.network.unsubscribe(
getAttestationTopic(forkDigest, SubnetId(subnet_id)))
node.actionTracker.subscribedSubnets = default(AttnetBits)
proc removePhase0MessageHandlers(node: BeaconNode) =
removePhase0MessageHandlers(node, node.dag.forkDigests.phase0)
proc addAltairMessageHandlers(node: BeaconNode, forkDigest: ForkDigest, slot: Slot) =
node.addPhase0MessageHandlers(forkDigest, slot)
var syncnets: SyncnetBits
# TODO: What are the best topic params for this?
for committeeIdx in allSyncSubcommittees():
closureScope:
let idx = committeeIdx
# TODO This should be done in dynamic way in trackSyncCommitteeTopics
node.network.subscribe(getSyncCommitteeTopic(forkDigest, idx), basicParams)
syncnets.setBit(idx.asInt)
node.network.subscribe(
getSyncCommitteeContributionAndProofTopic(forkDigest), basicParams)
node.network.updateSyncnetsMetadata(syncnets)
proc addAltairMessageHandlers(node: BeaconNode, slot: Slot) =
addAltairMessageHandlers(node, node.dag.forkDigests.altair, slot)
proc removeAltairMessageHandlers(node: BeaconNode, forkDigest: ForkDigest) =
node.removePhase0MessageHandlers(forkDigest)
for committeeIdx in allSyncSubcommittees():
closureScope:
let idx = committeeIdx
# TODO This should be done in dynamic way in trackSyncCommitteeTopics
node.network.unsubscribe(getSyncCommitteeTopic(forkDigest, idx))
node.network.unsubscribe(
getSyncCommitteeContributionAndProofTopic(forkDigest))
proc removeAltairMessageHandlers(node: BeaconNode) =
removeAltairMessageHandlers(node, node.dag.forkDigests.altair)
proc addMergeMessageHandlers(node: BeaconNode, slot: Slot) =
addAltairMessageHandlers(node, node.dag.forkDigests.merge, slot)
proc removeMergeMessageHandlers(node: BeaconNode) =
removeAltairMessageHandlers(node, node.dag.forkDigests.merge)
proc removeAllMessageHandlers(node: BeaconNode) =
node.removePhase0MessageHandlers()
node.removeAltairMessageHandlers()
node.removeMergeMessageHandlers()
proc setupDoppelgangerDetection(node: BeaconNode, slot: Slot) =
# When another client's already running, this is very likely to detect
# potential duplicate validators, which can trigger slashing.
#
# Every missed attestation costs approximately 3*get_base_reward(), which
# can be up to around 10,000 Wei. Thus, skipping attestations isn't cheap
# and one should gauge the likelihood of this simultaneous launch to tune
# the epoch delay to one's perceived risk.
const duplicateValidatorEpochs = 2
node.processor.doppelgangerDetection.broadcastStartEpoch =
slot.epoch + duplicateValidatorEpochs
debug "Setting up doppelganger protection",
epoch = slot.epoch,
broadcastStartEpoch =
node.processor.doppelgangerDetection.broadcastStartEpoch
proc trackSyncCommitteeTopics*(node: BeaconNode) =
# TODO
discard
proc updateGossipStatus(node: BeaconNode, slot: Slot) {.async.} =
## Subscribe to subnets that we are providing stability for or aggregating
## and unsubscribe from the ones that are no longer relevant.
# Let the tracker know what duties are approaching - this will tell us how
# many stability subnets we need to be subscribed to and what subnets we'll
# soon be aggregating - in addition to the in-beacon-node duties, there may
# also be duties coming from the validator client, but we don't control when
# these arrive
await node.registerDuties(slot)
# We start subscribing to gossip before we're fully synced - this allows time
# to subscribe before the sync end game
const
TOPIC_SUBSCRIBE_THRESHOLD_SLOTS = 64
HYSTERESIS_BUFFER = 16
let
head = node.dag.head
headDistance =
if slot > head.slot: (slot - head.slot).uint64
else: 0'u64
targetGossipState =
if headDistance > TOPIC_SUBSCRIBE_THRESHOLD_SLOTS + HYSTERESIS_BUFFER:
GossipState.Disconnected
elif slot.epoch + 1 < node.dag.cfg.ALTAIR_FORK_EPOCH:
GossipState.ConnectedToPhase0
elif slot.epoch >= node.dag.cfg.ALTAIR_FORK_EPOCH:
GossipState.ConnectedToAltair
else:
GossipState.InTransitionToAltair
if node.gossipState == GossipState.Disconnected and
targetGossipState != GossipState.Disconnected:
# We are synced, so we will connect
debug "Enabling topic subscriptions",
wallSlot = slot,
headSlot = head.slot,
headDistance, targetGossipState
node.setupDoppelgangerDetection(slot)
# Specially when waiting for genesis, we'll already be synced on startup -
# it might also happen on a sufficiently fast restart
# We "know" the actions for the current and the next epoch
if node.isSynced(head):
node.actionTracker.updateActions(
node.dag.getEpochRef(head, slot.epoch))
node.actionTracker.updateActions(
node.dag.getEpochRef(head, slot.epoch + 1))
case targetGossipState
of GossipState.Disconnected:
case node.gossipState:
of GossipState.Disconnected: discard
else:
debug "Disabling topic subscriptions",
wallSlot = slot,
headSlot = head.slot,
headDistance
node.removeAllMessageHandlers()
node.gossipState = GossipState.Disconnected
of GossipState.ConnectedToPhase0:
case node.gossipState:
of GossipState.ConnectedToPhase0: discard
of GossipState.Disconnected:
node.addPhase0MessageHandlers(slot)
of GossipState.InTransitionToAltair:
warn "Unexpected clock regression during altair transition"
node.removeAltairMessageHandlers()
of GossipState.ConnectedToAltair:
warn "Unexpected clock regression during altair transition"
node.removeAltairMessageHandlers()
node.addPhase0MessageHandlers(slot)
of GossipState.InTransitionToAltair:
case node.gossipState:
of GossipState.InTransitionToAltair: discard
of GossipState.Disconnected:
node.addPhase0MessageHandlers(slot)
node.addAltairMessageHandlers(slot)
of GossipState.ConnectedToPhase0:
node.addAltairMessageHandlers(slot)
of GossipState.ConnectedToAltair:
warn "Unexpected clock regression during altair transition"
node.addPhase0MessageHandlers(slot)
of GossipState.ConnectedToAltair:
case node.gossipState:
of GossipState.ConnectedToAltair: discard
of GossipState.Disconnected:
node.addAltairMessageHandlers(slot)
of GossipState.ConnectedToPhase0:
node.removePhase0MessageHandlers()
node.addAltairMessageHandlers(slot)
of GossipState.InTransitionToAltair:
node.removePhase0MessageHandlers()
node.gossipState = targetGossipState
node.updateAttestationSubnetHandlers(slot)
proc onSlotEnd(node: BeaconNode, slot: Slot) {.async.} =
# Things we do when slot processing has ended and we're about to wait for the
# next slot
if node.dag.needStateCachesAndForkChoicePruning():
if node.attachedValidators.validators.len > 0:
node.attachedValidators
.slashingProtection
# pruning is only done if the DB is set to pruning mode.
.pruneAfterFinalization(
node.dag.finalizedHead.slot.compute_epoch_at_slot()
)
# Delay part of pruning until latency critical duties are done.
# The other part of pruning, `pruneBlocksDAG`, is done eagerly.
# ----
# This is the last pruning to do as it clears the "needPruning" condition.
node.consensusManager[].pruneStateCachesAndForkChoice()
when declared(GC_fullCollect):
# The slots in the beacon node work as frames in a game: we want to make
# sure that we're ready for the next one and don't get stuck in lengthy
# garbage collection tasks when time is of essence in the middle of a slot -
# while this does not guarantee that we'll never collect during a slot, it
# makes sure that all the scratch space we used during slot tasks (logging,
# temporary buffers etc) gets recycled for the next slot that is likely to
# need similar amounts of memory.
GC_fullCollect()
# Checkpoint the database to clear the WAL file and make sure changes in
# the database are synced with the filesystem.
node.db.checkpoint()
node.syncCommitteeMsgPool[].pruneData(slot)
# Update upcoming actions - we do this every slot in case a reorg happens
if node.isSynced(node.dag.head) and
node.actionTracker.lastCalculatedEpoch < slot.epoch + 1:
# TODO this is costly because we compute an EpochRef that likely will never
# be used for anything else, due to the epoch ancestor being selected
# pessimistically with respect to the shuffling - this needs fixing
# at EpochRef level by not mixing balances and shufflings in the same
# place
let epochRef = node.dag.getEpochRef(node.dag.head, slot.epoch + 1)
node.actionTracker.updateActions(epochRef)
let
nextAttestationSlot = getNextValidatorAction(
node.actionTracker.attestingSlots,
node.actionTracker.lastCalculatedEpoch, slot)
nextProposalSlot = getNextValidatorAction(
node.actionTracker.proposingSlots,
node.actionTracker.lastCalculatedEpoch, slot)
nextActionWaitTime = saturate(fromNow(
node.beaconClock, min(nextAttestationSlot, nextProposalSlot)))
# -1 is a more useful output than 18446744073709551615 as an indicator of
# no future attestation/proposal known.
template displayInt64(x: Slot): int64 =
if x == high(uint64).Slot:
-1'i64
else:
toGaugeValue(x)
info "Slot end",
slot = shortLog(slot),
nextActionWait =
if nextAttestationSlot == FAR_FUTURE_SLOT:
"n/a"
else:
shortLog(nextActionWaitTime),
nextAttestationSlot = displayInt64(nextAttestationSlot),
nextProposalSlot = displayInt64(nextProposalSlot),
head = shortLog(node.dag.head)
if nextAttestationSlot != FAR_FUTURE_SLOT:
next_action_wait.set(nextActionWaitTime.toFloatSeconds)
let epoch = slot.epoch
if epoch + 1 >= node.network.forkId.next_fork_epoch:
# Update 1 epoch early to block non-fork-ready peers
node.network.updateForkId(epoch, node.dag.genesisValidatorsRoot)
# When we're not behind schedule, we'll speculatively update the clearance
# state in anticipation of receiving the next block - we do it after logging
# slot end since the nextActionWaitTime can be short
let
advanceCutoff = node.beaconClock.fromNow(
slot.toBeaconTime(chronos.seconds(int(SECONDS_PER_SLOT - 1))))
if advanceCutoff.inFuture:
# We wait until there's only a second left before the next slot begins, then
# we advance the clearance state to the next slot - this gives us a high
# probability of being prepared for the block that will arrive and the
# epoch processing that follows
await sleepAsync(advanceCutoff.offset)
node.dag.advanceClearanceState()
# Prepare action tracker for the next slot
node.actionTracker.updateSlot(slot + 1)
# The last thing we do is to perform the subscriptions and unsubscriptions for
# the next slot, just before that slot starts - because of the advance cuttoff
# above, this will be done just before the next slot starts
await node.updateGossipStatus(slot + 1)
proc onSlotStart(
node: BeaconNode, wallTime: BeaconTime, lastSlot: Slot) {.async.} =
## Called at the beginning of a slot - usually every slot, but sometimes might
## skip a few in case we're running late.
## wallTime: current system time - we will strive to perform all duties up
## to this point in time
## lastSlot: the last slot that we successfully processed, so we know where to
## start work from - there might be jumps if processing is delayed
let
# The slot we should be at, according to the clock
wallSlot = wallTime.slotOrZero
# If everything was working perfectly, the slot that we should be processing
expectedSlot = lastSlot + 1
finalizedEpoch =
node.dag.finalizedHead.blck.slot.compute_epoch_at_slot()
delay = wallTime - expectedSlot.toBeaconTime()
info "Slot start",
slot = shortLog(wallSlot),
epoch = shortLog(wallSlot.epoch),
sync =
if node.syncManager.inProgress: node.syncManager.syncStatus
else: "synced",
peers = len(node.network.peerPool),
head = shortLog(node.dag.head),
finalized = shortLog(getStateField(
node.dag.headState.data, finalized_checkpoint)),
delay = shortLog(delay)
# Check before any re-scheduling of onSlotStart()
checkIfShouldStopAtEpoch(wallSlot, node.config.stopAtEpoch)
beacon_slot.set wallSlot.toGaugeValue
beacon_current_epoch.set wallSlot.epoch.toGaugeValue
# both non-negative, so difference can't overflow or underflow int64
finalization_delay.set(
wallSlot.epoch.toGaugeValue - finalizedEpoch.toGaugeValue)
if node.config.verifyFinalization:
verifyFinalization(node, wallSlot)
node.consensusManager[].updateHead(wallSlot)
await node.handleValidatorDuties(lastSlot, wallSlot)
if node.eth1Monitor != nil and (wallSlot mod SLOTS_PER_EPOCH) == 0:
let finalizedEpochRef = node.dag.getFinalizedEpochRef()
discard node.eth1Monitor.trackFinalizedState(
finalizedEpochRef.eth1_data, finalizedEpochRef.eth1_deposit_index)
await onSlotEnd(node, wallSlot)
proc handleMissingBlocks(node: BeaconNode) =
let missingBlocks = node.quarantine[].checkMissing()
if missingBlocks.len > 0:
debug "Requesting detected missing blocks", blocks = shortLog(missingBlocks)
node.requestManager.fetchAncestorBlocks(missingBlocks)
proc onSecond(node: BeaconNode) =
## This procedure will be called once per second.
if not(node.syncManager.inProgress):
node.handleMissingBlocks()
proc runOnSecondLoop(node: BeaconNode) {.async.} =
let sleepTime = chronos.seconds(1)
const nanosecondsIn1s = float(chronos.seconds(1).nanoseconds)
while true:
let start = chronos.now(chronos.Moment)
await chronos.sleepAsync(sleepTime)
let afterSleep = chronos.now(chronos.Moment)
let sleepTime = afterSleep - start
node.onSecond()
let finished = chronos.now(chronos.Moment)
let processingTime = finished - afterSleep
ticks_delay.set(sleepTime.nanoseconds.float / nanosecondsIn1s)
trace "onSecond task completed", sleepTime, processingTime
func connectedPeersCount(node: BeaconNode): int =
len(node.network.peerPool)
proc installRpcHandlers(rpcServer: RpcServer, node: BeaconNode) {.
raises: [Defect, CatchableError].} =
rpcServer.installBeaconApiHandlers(node)
rpcServer.installConfigApiHandlers(node)
rpcServer.installDebugApiHandlers(node)
rpcServer.installEventApiHandlers(node)
rpcServer.installNimbusApiHandlers(node)
rpcServer.installNodeApiHandlers(node)
rpcServer.installValidatorApiHandlers(node)
proc installRestHandlers(restServer: RestServerRef, node: BeaconNode) =
restServer.router.installBeaconApiHandlers(node)
restServer.router.installConfigApiHandlers(node)
restServer.router.installDebugApiHandlers(node)
restServer.router.installEventApiHandlers(node)
restServer.router.installNimbusApiHandlers(node)
restServer.router.installNodeApiHandlers(node)
restServer.router.installValidatorApiHandlers(node)
if node.config.validatorApiEnabled:
restServer.router.installValidatorManagementHandlers(node)
proc installMessageValidators(node: BeaconNode) =
# https://github.com/ethereum/consensus-specs/blob/v1.0.1/specs/phase0/p2p-interface.md#attestations-and-aggregation
# These validators stay around the whole time, regardless of which specific
# subnets are subscribed to during any given epoch.
func toValidationResult(res: ValidationRes): ValidationResult =
if res.isOk(): ValidationResult.Accept else: res.error()[0]
node.network.addValidator(
getBeaconBlocksTopic(node.dag.forkDigests.phase0),
proc (signedBlock: phase0.SignedBeaconBlock): ValidationResult =
toValidationResult(node.processor[].blockValidator(signedBlock)))
template installPhase0Validators(digest: auto) =
for it in 0'u64 ..< ATTESTATION_SUBNET_COUNT.uint64:
closureScope:
let subnet_id = SubnetId(it)
node.network.addAsyncValidator(
getAttestationTopic(digest, subnet_id),
# This proc needs to be within closureScope; don't lift out of loop.
proc(attestation: Attestation): Future[ValidationResult] {.async.} =
return toValidationResult(
await node.processor.attestationValidator(attestation, subnet_id)))
node.network.addAsyncValidator(
getAggregateAndProofsTopic(digest),
proc(signedAggregateAndProof: SignedAggregateAndProof):
Future[ValidationResult] {.async.} =
return toValidationResult(
await node.processor.aggregateValidator(signedAggregateAndProof)))
node.network.addValidator(
getAttesterSlashingsTopic(digest),
proc (attesterSlashing: AttesterSlashing): ValidationResult =
toValidationResult(
node.processor[].attesterSlashingValidator(attesterSlashing)))
node.network.addValidator(
getProposerSlashingsTopic(digest),
proc (proposerSlashing: ProposerSlashing): ValidationResult =
toValidationResult(
node.processor[].proposerSlashingValidator(proposerSlashing)))
node.network.addValidator(
getVoluntaryExitsTopic(digest),
proc (signedVoluntaryExit: SignedVoluntaryExit): ValidationResult =
toValidationResult(
node.processor[].voluntaryExitValidator(signedVoluntaryExit)))
installPhase0Validators(node.dag.forkDigests.phase0)
# Validators introduced in phase0 are also used in altair and merge, but with
# different fork digest
installPhase0Validators(node.dag.forkDigests.altair)
installPhase0Validators(node.dag.forkDigests.merge)
node.network.addValidator(
getBeaconBlocksTopic(node.dag.forkDigests.altair),
proc (signedBlock: altair.SignedBeaconBlock): ValidationResult =
toValidationResult(node.processor[].blockValidator(signedBlock)))
node.network.addValidator(
getBeaconBlocksTopic(node.dag.forkDigests.merge),
proc (signedBlock: merge.SignedBeaconBlock): ValidationResult =
toValidationResult(node.processor[].blockValidator(signedBlock)))
template installSyncCommitteeeValidators(digest: auto) =
for committeeIdx in allSyncSubcommittees():
closureScope:
let idx = committeeIdx
node.network.addAsyncValidator(
getSyncCommitteeTopic(digest, idx),
# This proc needs to be within closureScope; don't lift out of loop.
proc(msg: SyncCommitteeMessage): Future[ValidationResult] {.async.} =
return toValidationResult(
await node.processor.syncCommitteeMessageValidator(msg, idx)))
node.network.addAsyncValidator(
getSyncCommitteeContributionAndProofTopic(digest),
proc(msg: SignedContributionAndProof): Future[ValidationResult] {.async.} =
return toValidationResult(
await node.processor.contributionValidator(msg)))
installSyncCommitteeeValidators(node.dag.forkDigests.altair)
installSyncCommitteeeValidators(node.dag.forkDigests.merge)
proc stop*(node: BeaconNode) =
bnStatus = BeaconNodeStatus.Stopping
notice "Graceful shutdown"
if not node.config.inProcessValidators:
try:
node.vcProcess.close()
except Exception as exc:
warn "Couldn't close vc process", msg = exc.msg
try:
waitFor node.network.stop()
except CatchableError as exc:
warn "Couldn't stop network", msg = exc.msg
node.attachedValidators.slashingProtection.close()
node.db.close()
notice "Databases closed"
proc run*(node: BeaconNode) {.raises: [Defect, CatchableError].} =
bnStatus = BeaconNodeStatus.Running
if not(isNil(node.rpcServer)):
node.rpcServer.installRpcHandlers(node)
node.rpcServer.start()
if not(isNil(node.restServer)):
node.restServer.installRestHandlers(node)
node.restServer.start()
let
wallTime = node.beaconClock.now()
wallSlot = wallTime.slotOrZero()
node.requestManager.start()
node.syncManager.start()
waitFor node.updateGossipStatus(wallSlot)
asyncSpawn runSlotLoop(node, wallTime, onSlotStart)
asyncSpawn runOnSecondLoop(node)
asyncSpawn runQueueProcessingLoop(node.blockProcessor)
## Ctrl+C handling
proc controlCHandler() {.noconv.} =
when defined(windows):
# workaround for https://github.com/nim-lang/Nim/issues/4057
try:
setupForeignThreadGc()
except Exception as exc: raiseAssert exc.msg # shouldn't happen
notice "Shutting down after having received SIGINT"
bnStatus = BeaconNodeStatus.Stopping
try:
setControlCHook(controlCHandler)
except Exception as exc: # TODO Exception
warn "Cannot set ctrl-c handler", msg = exc.msg
# equivalent SIGTERM handler
when defined(posix):
proc SIGTERMHandler(signal: cint) {.noconv.} =
notice "Shutting down after having received SIGTERM"
bnStatus = BeaconNodeStatus.Stopping
c_signal(SIGTERM, SIGTERMHandler)
# main event loop
while bnStatus == BeaconNodeStatus.Running:
poll() # if poll fails, the network is broken
# time to say goodbye
node.stop()
var gPidFile: string
proc createPidFile(filename: string) {.raises: [Defect, IOError].} =
writeFile filename, $os.getCurrentProcessId()
gPidFile = filename
addQuitProc proc {.noconv.} = discard io2.removeFile(gPidFile)
proc initializeNetworking(node: BeaconNode) {.async.} =
node.installMessageValidators()
info "Listening to incoming network requests"
await node.network.startListening()
let addressFile = node.config.dataDir / "beacon_node.enr"
writeFile(addressFile, node.network.announcedENR.toURI)
await node.network.start()
proc start(node: BeaconNode) {.raises: [Defect, CatchableError].} =
let
head = node.dag.head
finalizedHead = node.dag.finalizedHead
genesisTime = node.beaconClock.fromNow(toBeaconTime(Slot 0))
notice "Starting beacon node",
version = fullVersionStr,
enr = node.network.announcedENR.toURI,
peerId = $node.network.switch.peerInfo.peerId,
timeSinceFinalization =
node.beaconClock.now() - finalizedHead.slot.toBeaconTime(),
head = shortLog(head),
justified = shortLog(getStateField(
node.dag.headState.data, current_justified_checkpoint)),
finalized = shortLog(getStateField(
node.dag.headState.data, finalized_checkpoint)),
finalizedHead = shortLog(finalizedHead),
SLOTS_PER_EPOCH,
SECONDS_PER_SLOT,
SPEC_VERSION,
dataDir = node.config.dataDir.string,
validators = node.attachedValidators[].count
if genesisTime.inFuture:
notice "Waiting for genesis", genesisIn = genesisTime.offset
waitFor node.initializeNetworking()
if node.eth1Monitor != nil:
node.eth1Monitor.start()
else:
notice "Running without execution chain monitor, block producation partially disabled"
node.run()
func formatGwei(amount: uint64): string =
# TODO This is implemented in a quite a silly way.
# Better routines for formatting decimal numbers
# should exists somewhere else.
let
eth = amount div 1000000000
remainder = amount mod 1000000000
result = $eth
if remainder != 0:
result.add '.'
let remainderStr = $remainder
for i in remainderStr.len ..< 9:
result.add '0'
result.add remainderStr
while result[^1] == '0':
result.setLen(result.len - 1)
proc initStatusBar(node: BeaconNode) {.raises: [Defect, ValueError].} =
if not isatty(stdout): return
if not node.config.statusBarEnabled: return
try:
enableTrueColors()
except Exception as exc: # TODO Exception
error "Couldn't enable colors", err = exc.msg
proc dataResolver(expr: string): string {.raises: [Defect].} =
template justified: untyped = node.dag.head.atEpochStart(
getStateField(
node.dag.headState.data, current_justified_checkpoint).epoch)
# TODO:
# We should introduce a general API for resolving dot expressions
# such as `db.latest_block.slot` or `metrics.connected_peers`.
# Such an API can be shared between the RPC back-end, CLI tools
# such as ncli, a potential GraphQL back-end and so on.
# The status bar feature would allow the user to specify an
# arbitrary expression that is resolvable through this API.
case expr.toLowerAscii
of "connected_peers":
$(node.connectedPeersCount)
of "head_root":
shortLog(node.dag.head.root)
of "head_epoch":
$(node.dag.head.slot.epoch)
of "head_epoch_slot":
$(node.dag.head.slot mod SLOTS_PER_EPOCH)
of "head_slot":
$(node.dag.head.slot)
of "justifed_root":
shortLog(justified.blck.root)
of "justifed_epoch":
$(justified.slot.epoch)
of "justifed_epoch_slot":
$(justified.slot mod SLOTS_PER_EPOCH)
of "justifed_slot":
$(justified.slot)
of "finalized_root":
shortLog(node.dag.finalizedHead.blck.root)
of "finalized_epoch":
$(node.dag.finalizedHead.slot.epoch)
of "finalized_epoch_slot":
$(node.dag.finalizedHead.slot mod SLOTS_PER_EPOCH)
of "finalized_slot":
$(node.dag.finalizedHead.slot)
of "epoch":
$node.currentSlot.epoch
of "epoch_slot":
$(node.currentSlot mod SLOTS_PER_EPOCH)
of "slot":
$node.currentSlot
of "slots_per_epoch":
$SLOTS_PER_EPOCH
of "slot_trailing_digits":
var slotStr = $node.currentSlot
if slotStr.len > 3: slotStr = slotStr[^3..^1]
slotStr
of "attached_validators_balance":
formatGwei(node.attachedValidatorBalanceTotal)
of "sync_status":
if isNil(node.syncManager):
"pending"
else:
if node.syncManager.inProgress:
node.syncManager.syncStatus
else:
"synced"
else:
# We ignore typos for now and just render the expression
# as it was written. TODO: come up with a good way to show
# an error message to the user.
"$" & expr
var statusBar = StatusBarView.init(
node.config.statusBarContents,
dataResolver)
when compiles(defaultChroniclesStream.outputs[0].writer):
let tmp = defaultChroniclesStream.outputs[0].writer
defaultChroniclesStream.outputs[0].writer =
proc (logLevel: LogLevel, msg: LogOutputStr) {.raises: [Defect].} =
try:
# p.hidePrompt
erase statusBar
# p.writeLine msg
tmp(logLevel, msg)
render statusBar
# p.showPrompt
except Exception as e: # render raises Exception
logLoggingFailure(cstring(msg), e)
proc statusBarUpdatesPollingLoop() {.async.} =
try:
while true:
update statusBar
erase statusBar
render statusBar
await sleepAsync(chronos.seconds(1))
except CatchableError as exc:
warn "Failed to update status bar, no further updates", err = exc.msg
asyncSpawn statusBarUpdatesPollingLoop()
proc handleValidatorExitCommand(config: BeaconNodeConf) {.async.} =
let port = try:
let value = parseInt(config.rpcUrlForExit.port)
if value < Port.low.int or value > Port.high.int:
raise newException(ValueError,
"The port number must be between " & $Port.low & " and " & $Port.high)
Port value
except CatchableError as err:
fatal "Invalid port number", err = err.msg
quit 1
let rpcClient = newRpcHttpClient()
try:
await connect(rpcClient, config.rpcUrlForExit.hostname, port,
secure = config.rpcUrlForExit.scheme in ["https", "wss"])
except CatchableError as err:
fatal "Failed to connect to the beacon node RPC service", err = err.msg
quit 1
let (validator, validatorIdx, _, _) = try:
await rpcClient.get_v1_beacon_states_stateId_validators_validatorId(
"head", config.exitedValidator)
except CatchableError as err:
fatal "Failed to obtain information for validator", err = err.msg
quit 1
let exitAtEpoch = if config.exitAtEpoch.isSome:
Epoch config.exitAtEpoch.get
else:
let headSlot = try:
await rpcClient.getBeaconHead()
except CatchableError as err:
fatal "Failed to obtain the current head slot", err = err.msg
quit 1
headSlot.epoch
let
validatorsDir = config.validatorsDir
validatorKeyAsStr = "0x" & $validator.pubkey
keystoreDir = validatorsDir / validatorKeyAsStr
if not dirExists(keystoreDir):
echo "The validator keystores directory '" & config.validatorsDir.string &
"' does not contain a keystore for the selected validator with public " &
"key '" & validatorKeyAsStr & "'."
quit 1
let signingItem = loadKeystore(
validatorsDir,
config.secretsDir,
validatorKeyAsStr,
config.nonInteractive)
if signingItem.isNone:
fatal "Unable to continue without decrypted signing key"
quit 1
let fork = try:
await rpcClient.get_v1_beacon_states_fork("head")
except CatchableError as err:
fatal "Failed to obtain the fork id of the head state", err = err.msg
quit 1
let genesisValidatorsRoot = try:
(await rpcClient.get_v1_beacon_genesis()).genesis_validators_root
except CatchableError as err:
fatal "Failed to obtain the genesis validators root of the network",
err = err.msg
quit 1
var signedExit = SignedVoluntaryExit(
message: VoluntaryExit(
epoch: exitAtEpoch,
validator_index: validatorIdx))
signedExit.signature =
block:
let key = signingItem.get().privateKey
get_voluntary_exit_signature(fork, genesisValidatorsRoot,
signedExit.message, key).toValidatorSig()
template ask(prompt: string): string =
try:
stdout.write prompt, ": "
stdin.readLine()
except IOError:
fatal "Failed to read user input from stdin"
quit 1
try:
echoP "PLEASE BEWARE!"
echoP "Publishing a voluntary exit is an irreversible operation! " &
"You won't be able to restart again with the same validator."
echoP "By requesting an exit now, you'll be exempt from penalties " &
"stemming from not performing your validator duties, but you " &
"won't be able to withdraw your deposited funds for the time " &
"being. This means that your funds will be effectively frozen " &
"until withdrawals are enabled in a future phase of Eth2."
echoP "To understand more about the Eth2 roadmap, we recommend you " &
"have a look at\n" &
"https://ethereum.org/en/eth2/#roadmap"
echoP "You must keep your validator running for at least 5 epochs " &
"(32 minutes) after requesting a validator exit, as you will " &
"still be required to perform validator duties until your exit " &
"has been processed. The number of epochs could be significantly " &
"higher depending on how many other validators are queued to exit."
echoP "As such, we recommend you keep track of your validator's status " &
"using an Eth2 block explorer before shutting down your beacon node."
const
confirmation = "I understand the implications of submitting a voluntary exit"
while true:
echoP "To proceed to submitting your voluntary exit, please type '" &
confirmation & "' (without the quotes) in the prompt below and " &
"press ENTER or type 'q' to quit."
echo ""
let choice = ask "Your choice"
if choice == "q":
quit 0
elif choice == confirmation:
let success = await rpcClient.post_v1_beacon_pool_voluntary_exits(signedExit)
if success:
echo "Successfully published voluntary exit for validator " &
$validatorIdx & "(" & validatorKeyAsStr[0..9] & ")."
quit 0
else:
echo "The voluntary exit was not submitted successfully. Please try again."
quit 1
except CatchableError as err:
fatal "Failed to send the signed exit message to the beacon node RPC",
err = err.msg
quit 1
proc loadEth2Network(config: BeaconNodeConf): Eth2NetworkMetadata {.raises: [Defect, IOError].} =
network_name.set(2, labelValues = [config.eth2Network.get(otherwise = "mainnet")])
if config.eth2Network.isSome:
getMetadataForNetwork(config.eth2Network.get)
else:
when const_preset == "mainnet":
mainnetMetadata
else:
# Presumably other configurations can have other defaults, but for now
# this simplifies the flow
echo "Must specify network on non-mainnet node"
quit 1
proc doRunBeaconNode(config: var BeaconNodeConf, rng: ref BrHmacDrbgContext) {.raises: [Defect, CatchableError].} =
info "Launching beacon node",
version = fullVersionStr,
bls_backend = $BLS_BACKEND,
cmdParams = commandLineParams(),
config
createPidFile(config.dataDir.string / "beacon_node.pid")
config.createDumpDirs()
if config.metricsEnabled:
let metricsAddress = config.metricsAddress
notice "Starting metrics HTTP server",
url = "http://" & $metricsAddress & ":" & $config.metricsPort & "/metrics"
try:
startMetricsHttpServer($metricsAddress, config.metricsPort)
except CatchableError as exc: raise exc
except Exception as exc: raiseAssert exc.msg # TODO fix metrics
# There are no managed event loops in here, to do a graceful shutdown, but
# letting the default Ctrl+C handler exit is safe, since we only read from
# the db.
var metadata = config.loadEth2Network()
# https://github.com/ethereum/consensus-specs/blob/v1.1.5/specs/merge/client-settings.md#override-terminal-total-difficulty
if config.terminalTotalDifficultyOverride.isSome:
metadata.cfg.TERMINAL_TOTAL_DIFFICULTY =
config.terminalTotalDifficultyOverride.get.u256
# Updating the config based on the metadata certainly is not beautiful but it
# works
for node in metadata.bootstrapNodes:
config.bootstrapNodes.add node
let node = BeaconNode.init(
metadata.cfg,
rng,
config,
metadata.depositContractDeployedAt,
metadata.eth1Network,
metadata.genesisData,
metadata.genesisDepositsSnapshot)
if bnStatus == BeaconNodeStatus.Stopping:
return
initStatusBar(node)
if node.nickname != "":
dynamicLogScope(node = node.nickname): node.start()
else:
node.start()
proc doCreateTestnet(config: BeaconNodeConf, rng: var BrHmacDrbgContext) {.raises: [Defect, CatchableError].} =
let launchPadDeposits = try:
Json.loadFile(config.testnetDepositsFile.string, seq[LaunchPadDeposit])
except SerializationError as err:
error "Invalid LaunchPad deposits file",
err = formatMsg(err, config.testnetDepositsFile.string)
quit 1
var deposits: seq[DepositData]
for i in 0 ..< launchPadDeposits.len:
deposits.add(launchPadDeposits[i] as DepositData)
let
startTime = uint64(times.toUnix(times.getTime()) + config.genesisOffset)
outGenesis = config.outputGenesis.string
eth1Hash = if config.web3Urls.len == 0: eth1BlockHash
else: (waitFor getEth1BlockHash(config.web3Urls[0], blockId("latest"))).asEth2Digest
cfg = getRuntimeConfig(config.eth2Network)
var
initialState = newClone(initialize_beacon_state_from_eth1(
cfg, eth1Hash, startTime, deposits, {skipBlsValidation}))
# https://github.com/ethereum/eth2.0-pm/tree/6e41fcf383ebeb5125938850d8e9b4e9888389b4/interop/mocked_start#create-genesis-state
initialState.genesis_time = startTime
doAssert initialState.validators.len > 0
let outGenesisExt = splitFile(outGenesis).ext
if cmpIgnoreCase(outGenesisExt, ".json") == 0:
Json.saveFile(outGenesis, initialState, pretty = true)
echo "Wrote ", outGenesis
let outSszGenesis = outGenesis.changeFileExt "ssz"
SSZ.saveFile(outSszGenesis, initialState[])
echo "Wrote ", outSszGenesis
let bootstrapFile = config.outputBootstrapFile.string
if bootstrapFile.len > 0:
let
networkKeys = getPersistentNetKeys(rng, config)
netMetadata = getPersistentNetMetadata(config)
forkId = getENRForkID(
cfg,
initialState[].slot.epoch,
initialState[].genesis_validators_root)
bootstrapEnr = enr.Record.init(
1, # sequence number
networkKeys.seckey.asEthKey,
some(config.bootstrapAddress),
some(config.bootstrapPort),
some(config.bootstrapPort),
[
toFieldPair(enrForkIdField, SSZ.encode(forkId)),
toFieldPair(enrAttestationSubnetsField, SSZ.encode(netMetadata.attnets))
])
writeFile(bootstrapFile, bootstrapEnr.tryGet().toURI)
echo "Wrote ", bootstrapFile
proc findWalletWithoutErrors(config: BeaconNodeConf,
name: WalletName): Option[WalletPathPair] =
let res = findWallet(config, name)
if res.isErr:
fatal "Failed to locate wallet", error = res.error
quit 1
res.get
proc doDeposits(config: BeaconNodeConf, rng: var BrHmacDrbgContext) {.
raises: [Defect, CatchableError].} =
case config.depositsCmd
of DepositsCmd.createTestnetDeposits:
if config.eth2Network.isNone:
fatal "Please specify the intended testnet for the deposits"
quit 1
let metadata = config.loadEth2Network()
var seed: KeySeed
defer: burnMem(seed)
var walletPath: WalletPathPair
if config.existingWalletId.isSome:
let
id = config.existingWalletId.get
found = findWalletWithoutErrors(config, id)
if found.isSome:
walletPath = found.get
else:
fatal "Unable to find wallet with the specified name/uuid", id
quit 1
var unlocked = unlockWalletInteractively(walletPath.wallet)
if unlocked.isOk:
swap(seed, unlocked.get)
else:
# The failure will be reported in `unlockWalletInteractively`.
quit 1
else:
var walletRes = createWalletInteractively(rng, config)
if walletRes.isErr:
fatal "Unable to create wallet", err = walletRes.error
quit 1
else:
swap(seed, walletRes.get.seed)
walletPath = walletRes.get.walletPath
let vres = secureCreatePath(config.outValidatorsDir)
if vres.isErr():
fatal "Could not create directory", path = config.outValidatorsDir
quit QuitFailure
let sres = secureCreatePath(config.outSecretsDir)
if sres.isErr():
fatal "Could not create directory", path = config.outSecretsDir
quit QuitFailure
let deposits = generateDeposits(
metadata.cfg,
rng,
seed,
walletPath.wallet.nextAccount,
config.totalDeposits,
config.outValidatorsDir,
config.outSecretsDir)
if deposits.isErr:
fatal "Failed to generate deposits", err = deposits.error
quit 1
try:
let depositDataPath = if config.outDepositsFile.isSome:
config.outDepositsFile.get.string
else:
config.outValidatorsDir / "deposit_data-" & $epochTime() & ".json"
let launchPadDeposits =
mapIt(deposits.value, LaunchPadDeposit.init(metadata.cfg, it))
Json.saveFile(depositDataPath, launchPadDeposits)
echo "Deposit data written to \"", depositDataPath, "\""
walletPath.wallet.nextAccount += deposits.value.len
let status = saveWallet(walletPath)
if status.isErr:
fatal "Failed to update wallet file after generating deposits",
wallet = walletPath.path,
error = status.error
quit 1
except CatchableError as err:
fatal "Failed to create launchpad deposit data file", err = err.msg
quit 1
#[
of DepositsCmd.status:
echo "The status command is not implemented yet"
quit 1
]#
of DepositsCmd.`import`:
let validatorKeysDir = if config.importedDepositsDir.isSome:
config.importedDepositsDir.get
else:
let cwd = os.getCurrentDir()
if dirExists(cwd / "validator_keys"):
InputDir(cwd / "validator_keys")
else:
echo "The default search path for validator keys is a sub-directory " &
"named 'validator_keys' in the current working directory. Since " &
"no such directory exists, please either provide the correct path" &
"as an argument or copy the imported keys in the expected location."
quit 1
importKeystoresFromDir(
rng,
validatorKeysDir.string,
config.validatorsDir, config.secretsDir)
of DepositsCmd.exit:
waitFor handleValidatorExitCommand(config)
proc doWallets(config: BeaconNodeConf, rng: var BrHmacDrbgContext) {.
raises: [Defect, CatchableError].} =
case config.walletsCmd:
of WalletsCmd.create:
if config.createdWalletNameFlag.isSome:
let
name = config.createdWalletNameFlag.get
existingWallet = findWalletWithoutErrors(config, name)
if existingWallet.isSome:
echo "The Wallet '" & name.string & "' already exists."
quit 1
var walletRes = createWalletInteractively(rng, config)
if walletRes.isErr:
fatal "Unable to create wallet", err = walletRes.error
quit 1
burnMem(walletRes.get.seed)
of WalletsCmd.list:
for kind, walletFile in walkDir(config.walletsDir):
if kind != pcFile: continue
if checkSensitiveFilePermissions(walletFile):
let walletRes = loadWallet(walletFile)
if walletRes.isOk:
echo walletRes.get.longName
else:
warn "Found corrupt wallet file",
wallet = walletFile, error = walletRes.error
else:
warn "Found wallet file with insecure permissions",
wallet = walletFile
of WalletsCmd.restore:
restoreWalletInteractively(rng, config)
proc doRecord(config: BeaconNodeConf, rng: var BrHmacDrbgContext) {.
raises: [Defect, CatchableError].} =
case config.recordCmd:
of RecordCmd.create:
let netKeys = getPersistentNetKeys(rng, config)
var fieldPairs: seq[FieldPair]
for field in config.fields:
let fieldPair = field.split(":")
if fieldPair.len > 1:
fieldPairs.add(toFieldPair(fieldPair[0], hexToSeqByte(fieldPair[1])))
else:
fatal "Invalid field pair"
quit QuitFailure
let record = enr.Record.init(
config.seqNumber,
netKeys.seckey.asEthKey,
some(config.ipExt),
some(config.tcpPortExt),
some(config.udpPortExt),
fieldPairs).expect("Record within size limits")
echo record.toURI()
of RecordCmd.print:
echo $config.recordPrint
proc doWeb3Cmd(config: BeaconNodeConf) {.raises: [Defect, CatchableError].} =
case config.web3Cmd:
of Web3Cmd.test:
let metadata = config.loadEth2Network()
waitFor testWeb3Provider(config.web3TestUrl,
metadata.cfg.DEPOSIT_CONTRACT_ADDRESS)
proc doSlashingExport(conf: BeaconNodeConf) {.raises: [IOError, Defect].}=
let
dir = conf.validatorsDir()
filetrunc = SlashingDbName
# TODO: Make it read-only https://github.com/status-im/nim-eth/issues/312
let db = SlashingProtectionDB.loadUnchecked(dir, filetrunc, readOnly = false)
let interchange = conf.exportedInterchangeFile.string
db.exportSlashingInterchange(interchange, conf.exportedValidators)
echo "Export finished: '", dir/filetrunc & ".sqlite3" , "' into '", interchange, "'"
proc doSlashingImport(conf: BeaconNodeConf) {.raises: [SerializationError, IOError, Defect].} =
let
dir = conf.validatorsDir()
filetrunc = SlashingDbName
# TODO: Make it read-only https://github.com/status-im/nim-eth/issues/312
let interchange = conf.importedInterchangeFile.string
var spdir: SPDIR
try:
spdir = JSON.loadFile(interchange, SPDIR)
except SerializationError as err:
writeStackTrace()
stderr.write $JSON & " load issue for file \"", interchange, "\"\n"
stderr.write err.formatMsg(interchange), "\n"
quit 1
# Open DB and handle migration from v1 to v2 if needed
let db = SlashingProtectionDB.init(
genesis_validators_root = Eth2Digest spdir.metadata.genesis_validators_root,
basePath = dir,
dbname = filetrunc,
modes = {kCompleteArchive}
)
# Now import the slashing interchange file
# Failures mode:
# - siError can only happen with invalid genesis_validators_root which would be caught above
# - siPartial can happen for invalid public keys, slashable blocks, slashable votes
let status = db.inclSPDIR(spdir)
doAssert status in {siSuccess, siPartial}
echo "Import finished: '", interchange, "' into '", dir/filetrunc & ".sqlite3", "'"
proc doSlashingInterchange(conf: BeaconNodeConf) {.raises: [Defect, CatchableError].} =
doAssert conf.cmd == slashingdb
case conf.slashingdbCmd
of SlashProtCmd.`export`:
conf.doSlashingExport()
of SlashProtCmd.`import`:
conf.doSlashingImport()
{.pop.} # TODO moduletests exceptions
programMain:
var
config = makeBannerAndConfig(clientId, BeaconNodeConf)
if not(checkAndCreateDataDir(string(config.dataDir))):
# We are unable to access/create data folder or data folder's
# permissions are insecure.
quit QuitFailure
setupLogging(config.logLevel, config.logStdout, config.logFile)
## This Ctrl+C handler exits the program in non-graceful way.
## It's responsible for handling Ctrl+C in sub-commands such
## as `wallets *` and `deposits *`. In a regular beacon node
## run, it will be overwritten later with a different handler
## performing a graceful exit.
proc exitImmediatelyOnCtrlC() {.noconv.} =
when defined(windows):
# workaround for https://github.com/nim-lang/Nim/issues/4057
setupForeignThreadGc()
# in case a password prompt disabled echoing
resetStdin()
echo "" # If we interrupt during an interactive prompt, this
# will move the cursor to the next line
notice "Shutting down after having received SIGINT"
quit 0
setControlCHook(exitImmediatelyOnCtrlC)
# equivalent SIGTERM handler
when defined(posix):
proc exitImmediatelyOnSIGTERM(signal: cint) {.noconv.} =
notice "Shutting down after having received SIGTERM"
quit 0
c_signal(SIGTERM, exitImmediatelyOnSIGTERM)
# Single RNG instance for the application - will be seeded on construction
# and avoid using system resources (such as urandom) after that
let rng = keys.newRng()
case config.cmd
of createTestnet: doCreateTestnet(config, rng[])
of noCommand: doRunBeaconNode(config, rng)
of deposits: doDeposits(config, rng[])
of wallets: doWallets(config, rng[])
of record: doRecord(config, rng[])
of web3: doWeb3Cmd(config)
of slashingdb: doSlashingInterchange(config)