nimbus-eth2/beacon_chain/nimbus_validator_client.nim

201 lines
7.6 KiB
Nim

# beacon_chain
# 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.
import validator_client/[common, fallback_service, duties_service,
attestation_service, fork_service]
proc initGenesis(vc: ValidatorClientRef): Future[RestGenesis] {.async.} =
info "Initializing genesis", nodes_count = len(vc.beaconNodes)
var nodes = vc.beaconNodes
while true:
var pending: seq[Future[RestResponse[GetGenesisResponse]]]
for node in nodes:
debug "Requesting genesis information", endpoint = node
pending.add(node.client.getGenesis())
try:
await allFutures(pending)
except CancelledError as exc:
warn "Unexpected cancellation interrupt"
raise exc
let (errorNodes, genesisList) =
block:
var gres: seq[RestGenesis]
var bres: seq[BeaconNodeServerRef]
for i in 0 ..< len(pending):
let fut = pending[i]
if fut.done():
let resp = fut.read()
if resp.status == 200:
debug "Received genesis information", endpoint = nodes[i],
genesis_time = resp.data.data.genesis_time,
genesis_fork_version = resp.data.data.genesis_fork_version,
genesis_root = resp.data.data.genesis_validators_root
gres.add(resp.data.data)
else:
debug "Received unsuccessful response code", endpoint = nodes[i],
response_code = resp.status
bres.add(nodes[i])
elif fut.failed():
let error = fut.readError()
debug "Could not obtain genesis information from beacon node",
endpoint = nodes[i], error_name = error.name,
error_msg = error.msg
bres.add(nodes[i])
else:
debug "Interrupted while requesting information from beacon node",
endpoint = nodes[i]
bres.add(nodes[i])
(bres, gres)
if len(genesisList) == 0:
let sleepDuration = 2.seconds
info "Could not obtain network genesis information from nodes, repeating",
sleep_time = sleepDuration
await sleepAsync(sleepDuration)
nodes = errorNodes
else:
# Boyer-Moore majority vote algorithm
var melem: RestGenesis
var counter = 0
for item in genesisList:
if counter == 0:
melem = item
inc(counter)
else:
if melem == item:
inc(counter)
else:
dec(counter)
return melem
proc initValidators(vc: ValidatorClientRef): Future[bool] {.async.} =
info "Initializaing validators", path = vc.config.validatorsDir()
var duplicates: seq[ValidatorPubKey]
for keystore in listLoadableKeystores(vc.config):
let pubkey = keystore.pubkey
if pubkey in duplicates:
error "Duplicate validator's key found", validator_pubkey = pubkey
return false
else:
duplicates.add(pubkey)
vc.attachedValidators.addLocalValidator(keystore)
return true
proc initClock(vc: ValidatorClientRef): Future[BeaconClock] {.async.} =
# This procedure performs initialization of BeaconClock using current genesis
# information. It also performs waiting for genesis.
let res = BeaconClock.init(vc.beaconGenesis.genesis_time)
let currentSlot = res.now().slotOrZero()
let currentEpoch = currentSlot.epoch()
info "Initializing beacon clock",
genesis_time = vc.beaconGenesis.genesis_time,
current_slot = currentSlot, current_epoch = currentEpoch
let genesisTime = res.fromNow(toBeaconTime(Slot(0)))
if genesisTime.inFuture:
notice "Waiting for genesis", genesisIn = genesisTime.offset
await sleepAsync(genesisTime.offset)
return res
proc asyncInit(vc: ValidatorClientRef) {.async.} =
vc.beaconGenesis = await vc.initGenesis()
info "Genesis information", genesis_time = vc.beaconGenesis.genesis_time,
genesis_fork_version = vc.beaconGenesis.genesis_fork_version,
genesis_root = vc.beaconGenesis.genesis_validators_root
vc.beaconClock = await vc.initClock()
if not(await initValidators(vc)):
fatal "Could not initialize local validators"
info "Initializing slashing protection", path = vc.config.validatorsDir()
vc.attachedValidators.slashingProtection =
SlashingProtectionDB.init(
vc.beaconGenesis.genesis_validators_root,
vc.config.validatorsDir(), "slashing_protection"
)
vc.fallbackService = await FallbackServiceRef.init(vc)
vc.forkService = await ForkServiceRef.init(vc)
vc.dutiesService = await DutiesServiceRef.init(vc)
vc.attestationService = await AttestationServiceRef.init(vc)
proc onSlotStart(vc: ValidatorClientRef, 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
beaconTime = wallTime
wallSlot = wallTime.toSlot()
let
# If everything was working perfectly, the slot that we should be processing
expectedSlot = lastSlot + 1
delay = wallTime - expectedSlot.toBeaconTime()
checkIfShouldStopAtEpoch(wallSlot.slot, vc.config.stopAtEpoch)
info "Slot start",
slot = shortLog(wallSlot.slot),
attestationIn = vc.getDurationToNextAttestation(wallSlot.slot),
blockIn = vc.getDurationToNextBlock(wallSlot.slot),
delay = shortLog(delay)
proc asyncRun(vc: ValidatorClientRef) {.async.} =
vc.fallbackService.start()
vc.forkService.start()
vc.dutiesService.start()
vc.attestationService.start()
await runSlotLoop(vc, vc.beaconClock.now(), onSlotStart)
programMain:
let config = makeBannerAndConfig("Nimbus validator client " & fullVersionStr,
ValidatorClientConf)
setupLogging(config.logLevel, config.logStdout, config.logFile)
case config.cmd
of VCNoCommand:
let beaconNodes =
block:
var servers: seq[BeaconNodeServerRef]
let flags = {RestClientFlag.CommaSeparatedArray}
for url in config.beaconNodes:
let res = RestClientRef.new(url, flags = flags)
if res.isErr():
warn "Unable to resolve remote beacon node server's hostname",
url = url
else:
servers.add(BeaconNodeServerRef(client: res.get(), endpoint: url))
servers
if len(beaconNodes) == 0:
fatal "Not enough beacon nodes in command line"
quit 1
notice "Launching validator client", version = fullVersionStr,
cmdParams = commandLineParams(),
config,
beacon_nodes_count = len(beaconNodes)
var vc = ValidatorClientRef(
config: config,
beaconNodes: beaconNodes,
graffitiBytes: config.graffiti.get(defaultGraffitiBytes()),
nodesAvailable: newAsyncEvent(),
)
waitFor asyncInit(vc)
waitFor asyncRun(vc)