354 lines
13 KiB
Nim
354 lines
13 KiB
Nim
# beacon_chain
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# Copyright (c) 2018-2021 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * 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.
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import metrics, metrics/chronos_httpserver
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import validator_client/[common, fallback_service, duties_service,
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attestation_service, fork_service,
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sync_committee_service, doppelganger_service]
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type
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ValidatorClientError* = object of CatchableError
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proc initGenesis(vc: ValidatorClientRef): Future[RestGenesis] {.async.} =
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info "Initializing genesis", nodes_count = len(vc.beaconNodes)
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var nodes = vc.beaconNodes
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while true:
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var pendingRequests: seq[Future[RestResponse[GetGenesisResponse]]]
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for node in nodes:
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debug "Requesting genesis information", endpoint = node
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pendingRequests.add(node.client.getGenesis())
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try:
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await allFutures(pendingRequests)
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except CancelledError as exc:
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var pending: seq[Future[void]]
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debug "Genesis information request was interrupted"
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for future in pendingRequests:
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if not(future.finished()):
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pending.add(future.cancelAndWait())
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await allFutures(pending)
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raise exc
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let (errorNodes, genesisList) =
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block:
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var gres: seq[RestGenesis]
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var bres: seq[BeaconNodeServerRef]
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for i in 0 ..< len(pendingRequests):
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let fut = pendingRequests[i]
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if fut.done():
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let resp = fut.read()
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if resp.status == 200:
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debug "Received genesis information", endpoint = nodes[i],
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genesis_time = resp.data.data.genesis_time,
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genesis_fork_version = resp.data.data.genesis_fork_version,
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genesis_root = resp.data.data.genesis_validators_root
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gres.add(resp.data.data)
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else:
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debug "Received unsuccessful response code", endpoint = nodes[i],
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response_code = resp.status
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bres.add(nodes[i])
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elif fut.failed():
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let error = fut.readError()
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debug "Could not obtain genesis information from beacon node",
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endpoint = nodes[i], error_name = error.name,
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error_msg = error.msg
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bres.add(nodes[i])
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else:
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debug "Interrupted while requesting information from beacon node",
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endpoint = nodes[i]
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bres.add(nodes[i])
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(bres, gres)
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if len(genesisList) == 0:
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let sleepDuration = 2.seconds
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info "Could not obtain network genesis information from nodes, repeating",
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sleep_time = sleepDuration
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await sleepAsync(sleepDuration)
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nodes = errorNodes
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else:
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# Boyer-Moore majority vote algorithm
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var melem: RestGenesis
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var counter = 0
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for item in genesisList:
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if counter == 0:
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melem = item
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inc(counter)
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else:
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if melem == item:
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inc(counter)
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else:
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dec(counter)
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return melem
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proc initValidators(vc: ValidatorClientRef): Future[bool] {.async.} =
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info "Initializaing validators", path = vc.config.validatorsDir()
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var duplicates: seq[ValidatorPubKey]
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for keystore in listLoadableKeystores(vc.config):
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let pubkey = keystore.pubkey
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if pubkey in duplicates:
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error "Duplicate validator's key found", validator_pubkey = pubkey
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return false
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elif keystore.kind == KeystoreKind.Remote:
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info "Remote validator client was skipped", validator_pubkey = pubkey
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continue
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else:
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duplicates.add(pubkey)
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vc.addValidator(keystore)
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return true
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proc initClock(vc: ValidatorClientRef): Future[BeaconClock] {.async.} =
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# This procedure performs initialization of BeaconClock using current genesis
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# information. It also performs waiting for genesis.
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let res = BeaconClock.init(vc.beaconGenesis.genesis_time)
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let currentSlot = res.now().slotOrZero()
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let currentEpoch = currentSlot.epoch()
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info "Initializing beacon clock",
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genesis_time = vc.beaconGenesis.genesis_time,
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current_slot = currentSlot, current_epoch = currentEpoch
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let genesisTime = res.fromNow(start_beacon_time(Slot(0)))
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if genesisTime.inFuture:
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notice "Waiting for genesis", genesisIn = genesisTime.offset
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await sleepAsync(genesisTime.offset)
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return res
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proc initMetrics(vc: ValidatorClientRef): Future[bool] {.async.} =
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if vc.config.metricsEnabled:
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let
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metricsAddress = vc.config.metricsAddress
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metricsPort = vc.config.metricsPort
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url = "http://" & $metricsAddress & ":" & $metricsPort & "/metrics"
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info "Starting metrics HTTP server", url = url
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let server =
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block:
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let res = MetricsHttpServerRef.new($metricsAddress, metricsPort)
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if res.isErr():
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error "Could not start metrics HTTP server", url = url,
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error_msg = res.error()
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return false
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res.get()
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vc.metricsServer = some(server)
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try:
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await server.start()
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except MetricsError as exc:
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error "Could not start metrics HTTP server", url = url,
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error_msg = exc.msg, error_name = exc.name
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return false
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return true
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proc shutdownMetrics(vc: ValidatorClientRef) {.async.} =
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if vc.config.metricsEnabled:
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if vc.metricsServer.isSome():
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info "Shutting down metrics HTTP server"
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await vc.metricsServer.get().close()
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proc shutdownSlashingProtection(vc: ValidatorClientRef) =
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info "Closing slashing protection", path = vc.config.validatorsDir()
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vc.attachedValidators.slashingProtection.close()
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proc onSlotStart(vc: ValidatorClientRef, wallTime: BeaconTime,
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lastSlot: Slot): Future[bool] {.async.} =
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## Called at the beginning of a slot - usually every slot, but sometimes might
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## skip a few in case we're running late.
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## wallTime: current system time - we will strive to perform all duties up
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## to this point in time
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## lastSlot: the last slot that we successfully processed, so we know where to
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## start work from - there might be jumps if processing is delayed
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let
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# The slot we should be at, according to the clock
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beaconTime = wallTime
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wallSlot = wallTime.toSlot()
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let
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# If everything was working perfectly, the slot that we should be processing
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expectedSlot = lastSlot + 1
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delay = wallTime - expectedSlot.start_beacon_time()
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if checkIfShouldStopAtEpoch(wallSlot.slot, vc.config.stopAtEpoch):
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return true
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info "Slot start",
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slot = shortLog(wallSlot.slot),
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attestationIn = vc.getDurationToNextAttestation(wallSlot.slot),
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blockIn = vc.getDurationToNextBlock(wallSlot.slot),
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delay = shortLog(delay)
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return false
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proc asyncInit(vc: ValidatorClientRef) {.async.} =
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vc.beaconGenesis = await vc.initGenesis()
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info "Genesis information", genesis_time = vc.beaconGenesis.genesis_time,
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genesis_fork_version = vc.beaconGenesis.genesis_fork_version,
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genesis_root = vc.beaconGenesis.genesis_validators_root
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vc.beaconClock = await vc.initClock()
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if not(await initMetrics(vc)):
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raise newException(ValidatorClientError,
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"Could not initialize metrics server")
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try:
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if not(await initValidators(vc)):
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await vc.shutdownMetrics()
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raise newException(ValidatorClientError,
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"Could not initialize local validators")
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except CancelledError:
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debug "Initialization process interrupted"
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await vc.shutdownMetrics()
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return
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info "Initializing slashing protection", path = vc.config.validatorsDir()
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vc.attachedValidators.slashingProtection =
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SlashingProtectionDB.init(
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vc.beaconGenesis.genesis_validators_root,
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vc.config.validatorsDir(), "slashing_protection"
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)
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try:
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vc.fallbackService = await FallbackServiceRef.init(vc)
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vc.forkService = await ForkServiceRef.init(vc)
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vc.dutiesService = await DutiesServiceRef.init(vc)
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vc.doppelgangerService = await DoppelgangerServiceRef.init(vc)
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vc.attestationService = await AttestationServiceRef.init(vc)
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vc.syncCommitteeService = await SyncCommitteeServiceRef.init(vc)
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except CatchableError as exc:
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warn "Unexpected error encountered while initializing",
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error_name = exc.name, error_msg = exc.msg
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await vc.shutdownMetrics()
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vc.shutdownSlashingProtection()
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except CancelledError:
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debug "Initialization process interrupted"
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await vc.shutdownMetrics()
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vc.shutdownSlashingProtection()
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return
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proc asyncRun(vc: ValidatorClientRef) {.async.} =
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vc.fallbackService.start()
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vc.forkService.start()
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vc.dutiesService.start()
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vc.doppelgangerService.start()
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vc.attestationService.start()
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vc.syncCommitteeService.start()
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var exitEventFut = vc.gracefulExit.wait()
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try:
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vc.runSlotLoopFut = runSlotLoop(vc, vc.beaconClock.now(), onSlotStart)
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discard await race(vc.runSlotLoopFut, exitEventFut)
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if not(vc.runSlotLoopFut.finished()):
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notice "Received shutdown event, exiting"
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except CancelledError:
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debug "Main loop interrupted"
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except CatchableError as exc:
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debug "Main loop failed with an error", err_name = $exc.name,
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err_msg = $exc.msg
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await vc.shutdownMetrics()
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vc.shutdownSlashingProtection()
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debug "Stopping main processing loop"
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var pending: seq[Future[void]]
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if not(vc.runSlotLoopFut.finished()):
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pending.add(vc.runSlotLoopFut.cancelAndWait())
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if not(exitEventFut.finished()):
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pending.add(exitEventFut.cancelAndWait())
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debug "Stopping running services"
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pending.add(vc.fallbackService.stop())
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pending.add(vc.forkService.stop())
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pending.add(vc.dutiesService.stop())
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pending.add(vc.doppelgangerService.stop())
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pending.add(vc.attestationService.stop())
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pending.add(vc.syncCommitteeService.stop())
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await allFutures(pending)
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template runWithSignals(vc: ValidatorClientRef, body: untyped): bool =
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let future = body
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discard await race(future, vc.sigintHandleFut, vc.sigtermHandleFut)
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if future.finished():
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if future.failed() or future.cancelled():
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let exc = future.readError()
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debug "Validator client initialization failed", err_name = $exc.name,
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err_msg = $exc.msg
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var pending: seq[Future[void]]
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if not(vc.sigintHandleFut.finished()):
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pending.add(cancelAndWait(vc.sigintHandleFut))
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if not(vc.sigtermHandleFut.finished()):
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pending.add(cancelAndWait(vc.sigtermHandleFut))
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await allFutures(pending)
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false
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else:
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true
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else:
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let signal = if vc.sigintHandleFut.finished(): "SIGINT" else: "SIGTERM"
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info "Got interrupt, trying to shutdown gracefully", signal = signal
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var pending = @[cancelAndWait(future)]
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if not(vc.sigintHandleFut.finished()):
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pending.add(cancelAndWait(vc.sigintHandleFut))
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if not(vc.sigtermHandleFut.finished()):
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pending.add(cancelAndWait(vc.sigtermHandleFut))
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await allFutures(pending)
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false
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proc asyncLoop*(vc: ValidatorClientRef) {.async.} =
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if not(vc.runWithSignals(asyncInit(vc))):
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return
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if not(vc.runWithSignals(asyncRun(vc))):
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return
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programMain:
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let config = makeBannerAndConfig("Nimbus validator client " & fullVersionStr,
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ValidatorClientConf)
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setupLogging(config.logLevel, config.logStdout, config.logFile)
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let beaconNodes =
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block:
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var servers: seq[BeaconNodeServerRef]
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let flags = {RestClientFlag.CommaSeparatedArray}
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for url in config.beaconNodes:
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let res = RestClientRef.new(url, flags = flags)
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if res.isErr():
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warn "Unable to resolve remote beacon node server's hostname",
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url = url
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else:
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servers.add(BeaconNodeServerRef(client: res.get(), endpoint: url))
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servers
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if len(beaconNodes) == 0:
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# This should not happen, thanks to defaults in `conf.nim`
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fatal "Not enough beacon nodes in command line"
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quit 1
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notice "Launching validator client", version = fullVersionStr,
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cmdParams = commandLineParams(),
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config,
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beacon_nodes_count = len(beaconNodes)
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var vc =
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when declared(waitSignal):
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ValidatorClientRef(
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config: config,
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beaconNodes: beaconNodes,
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graffitiBytes: config.graffiti.get(defaultGraffitiBytes()),
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nodesAvailable: newAsyncEvent(),
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forksAvailable: newAsyncEvent(),
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gracefulExit: newAsyncEvent(),
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sigintHandleFut: waitSignal(SIGINT),
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sigtermHandleFut: waitSignal(SIGTERM)
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)
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else:
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ValidatorClientRef(
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config: config,
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beaconNodes: beaconNodes,
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graffitiBytes: config.graffiti.get(defaultGraffitiBytes()),
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nodesAvailable: newAsyncEvent(),
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forksAvailable: newAsyncEvent(),
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gracefulExit: newAsyncEvent(),
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sigintHandleFut: newFuture[void]("sigint_placeholder"),
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sigtermHandleFut: newFuture[void]("sigterm_placeholder")
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)
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waitFor asyncLoop(vc)
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info "Validator client stopped"
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