309 lines
11 KiB
Nim
309 lines
11 KiB
Nim
# beacon_chain
|
|
# Copyright (c) 2021-2022 Status Research & Development GmbH
|
|
# Licensed and distributed under either of
|
|
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
|
|
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
|
|
# at your option. This file may not be copied, modified, or distributed except according to those terms.
|
|
|
|
import common
|
|
|
|
const
|
|
ServiceName = "fallback_service"
|
|
|
|
logScope: service = ServiceName
|
|
|
|
type
|
|
BeaconNodesCounters* = object
|
|
online*: int
|
|
offline*: int
|
|
uninitalized*: int
|
|
incompatible*: int
|
|
nosync*: int
|
|
|
|
proc onlineNodes*(vc: ValidatorClientRef): seq[BeaconNodeServerRef] =
|
|
vc.beaconNodes.filterIt(it.status == RestBeaconNodeStatus.Online)
|
|
|
|
proc onlineNodesCount*(vc: ValidatorClientRef): int =
|
|
vc.beaconNodes.countIt(it.status == RestBeaconNodeStatus.Online)
|
|
|
|
proc unusableNodes*(vc: ValidatorClientRef): seq[BeaconNodeServerRef] =
|
|
vc.beaconNodes.filterIt(it.status != RestBeaconNodeStatus.Online)
|
|
|
|
proc unusableNodesCount*(vc: ValidatorClientRef): int =
|
|
vc.beaconNodes.countIt(it.status != RestBeaconNodeStatus.Online)
|
|
|
|
proc getNodeCounts*(vc: ValidatorClientRef): BeaconNodesCounters =
|
|
var res = BeaconNodesCounters()
|
|
for node in vc.beaconNodes:
|
|
case node.status
|
|
of RestBeaconNodeStatus.Uninitalized:
|
|
inc(res.uninitalized)
|
|
of RestBeaconNodeStatus.Offline:
|
|
inc(res.offline)
|
|
of RestBeaconNodeStatus.Incompatible:
|
|
inc(res.incompatible)
|
|
of RestBeaconNodeStatus.NotSynced:
|
|
inc(res.nosync)
|
|
of RestBeaconNodeStatus.Online:
|
|
inc(res.online)
|
|
res
|
|
|
|
proc waitOnlineNodes*(vc: ValidatorClientRef,
|
|
timeoutFut: Future[void] = nil) {.async.} =
|
|
doAssert(not(isNil(vc.fallbackService)))
|
|
while true:
|
|
if vc.onlineNodesCount() != 0:
|
|
break
|
|
else:
|
|
if vc.fallbackService.onlineEvent.isSet():
|
|
vc.fallbackService.onlineEvent.clear()
|
|
warn "Connection with beacon node(s) has been lost",
|
|
online_nodes = vc.onlineNodesCount(),
|
|
unusable_nodes = vc.unusableNodesCount(),
|
|
total_nodes = len(vc.beaconNodes)
|
|
if isNil(timeoutFut):
|
|
await vc.fallbackService.onlineEvent.wait()
|
|
else:
|
|
let breakLoop =
|
|
block:
|
|
let waitFut = vc.fallbackService.onlineEvent.wait()
|
|
try:
|
|
discard await race(waitFut, timeoutFut)
|
|
except CancelledError as exc:
|
|
if not(waitFut.finished()):
|
|
await waitFut.cancelAndWait()
|
|
raise exc
|
|
|
|
if not(waitFut.finished()):
|
|
await waitFut.cancelAndWait()
|
|
true
|
|
else:
|
|
false
|
|
if breakLoop:
|
|
break
|
|
|
|
proc checkCompatible(vc: ValidatorClientRef,
|
|
node: BeaconNodeServerRef) {.async.} =
|
|
logScope: endpoint = node
|
|
let info =
|
|
try:
|
|
debug "Requesting beacon node network configuration"
|
|
let res = await node.client.getSpecVC()
|
|
res.data.data
|
|
except CancelledError as exc:
|
|
debug "Configuration request was interrupted"
|
|
node.status = RestBeaconNodeStatus.Offline
|
|
raise exc
|
|
except RestError as exc:
|
|
debug "Unable to obtain beacon node's configuration",
|
|
error_name = exc.name, error_message = exc.msg
|
|
node.status = RestBeaconNodeStatus.Offline
|
|
return
|
|
except CatchableError as exc:
|
|
error "Unexpected exception", error_name = exc.name,
|
|
error_message = exc.msg
|
|
node.status = RestBeaconNodeStatus.Offline
|
|
return
|
|
|
|
let genesis =
|
|
try:
|
|
debug "Requesting beacon node genesis information"
|
|
let res = await node.client.getGenesis()
|
|
res.data.data
|
|
except CancelledError as exc:
|
|
debug "Genesis request was interrupted"
|
|
node.status = RestBeaconNodeStatus.Offline
|
|
raise exc
|
|
except RestError as exc:
|
|
debug "Unable to obtain beacon node's genesis",
|
|
error_name = exc.name, error_message = exc.msg
|
|
node.status = RestBeaconNodeStatus.Offline
|
|
return
|
|
except CatchableError as exc:
|
|
error "Unexpected exception", error_name = exc.name,
|
|
error_message = exc.msg
|
|
node.status = RestBeaconNodeStatus.Offline
|
|
return
|
|
|
|
let genesisFlag = (genesis != vc.beaconGenesis)
|
|
let configFlag =
|
|
# /!\ Keep in sync with `spec/eth2_apis/rest_types.nim` > `RestSpecVC`.
|
|
info.MAX_VALIDATORS_PER_COMMITTEE != MAX_VALIDATORS_PER_COMMITTEE or
|
|
info.SLOTS_PER_EPOCH != SLOTS_PER_EPOCH or
|
|
info.SECONDS_PER_SLOT != SECONDS_PER_SLOT or
|
|
info.EPOCHS_PER_ETH1_VOTING_PERIOD != EPOCHS_PER_ETH1_VOTING_PERIOD or
|
|
info.SLOTS_PER_HISTORICAL_ROOT != SLOTS_PER_HISTORICAL_ROOT or
|
|
info.EPOCHS_PER_HISTORICAL_VECTOR != EPOCHS_PER_HISTORICAL_VECTOR or
|
|
info.EPOCHS_PER_SLASHINGS_VECTOR != EPOCHS_PER_SLASHINGS_VECTOR or
|
|
info.HISTORICAL_ROOTS_LIMIT != HISTORICAL_ROOTS_LIMIT or
|
|
info.VALIDATOR_REGISTRY_LIMIT != VALIDATOR_REGISTRY_LIMIT or
|
|
info.MAX_PROPOSER_SLASHINGS != MAX_PROPOSER_SLASHINGS or
|
|
info.MAX_ATTESTER_SLASHINGS != MAX_ATTESTER_SLASHINGS or
|
|
info.MAX_ATTESTATIONS != MAX_ATTESTATIONS or
|
|
info.MAX_DEPOSITS != MAX_DEPOSITS or
|
|
info.MAX_VOLUNTARY_EXITS != MAX_VOLUNTARY_EXITS or
|
|
info.DOMAIN_BEACON_PROPOSER != DOMAIN_BEACON_PROPOSER or
|
|
info.DOMAIN_BEACON_ATTESTER != DOMAIN_BEACON_ATTESTER or
|
|
info.DOMAIN_RANDAO != DOMAIN_RANDAO or
|
|
info.DOMAIN_DEPOSIT != DOMAIN_DEPOSIT or
|
|
info.DOMAIN_VOLUNTARY_EXIT != DOMAIN_VOLUNTARY_EXIT or
|
|
info.DOMAIN_SELECTION_PROOF != DOMAIN_SELECTION_PROOF or
|
|
info.DOMAIN_AGGREGATE_AND_PROOF != DOMAIN_AGGREGATE_AND_PROOF
|
|
|
|
if configFlag or genesisFlag:
|
|
node.status = RestBeaconNodeStatus.Incompatible
|
|
warn "Beacon node has incompatible configuration",
|
|
genesis_flag = genesisFlag, config_flag = configFlag
|
|
else:
|
|
info "Beacon node has compatible configuration"
|
|
node.config = some(info)
|
|
node.genesis = some(genesis)
|
|
node.status = RestBeaconNodeStatus.Online
|
|
|
|
proc checkSync(vc: ValidatorClientRef,
|
|
node: BeaconNodeServerRef) {.async.} =
|
|
logScope: endpoint = node
|
|
let syncInfo =
|
|
try:
|
|
debug "Requesting beacon node sync status"
|
|
let res = await node.client.getSyncingStatus()
|
|
res.data.data
|
|
except CancelledError as exc:
|
|
debug "Sync status request was interrupted"
|
|
node.status = RestBeaconNodeStatus.Offline
|
|
raise exc
|
|
except RestError as exc:
|
|
debug "Unable to obtain beacon node's sync status",
|
|
error_name = exc.name, error_message = exc.msg
|
|
node.status = RestBeaconNodeStatus.Offline
|
|
return
|
|
except CatchableError as exc:
|
|
error "Unexpected exception", error_name = exc.name,
|
|
error_message = exc.msg
|
|
node.status = RestBeaconNodeStatus.Offline
|
|
return
|
|
node.syncInfo = some(syncInfo)
|
|
node.status =
|
|
block:
|
|
let optimistic =
|
|
if syncInfo.is_optimistic.isNone():
|
|
"none"
|
|
else:
|
|
$syncInfo.is_optimistic.get()
|
|
|
|
if not(syncInfo.is_syncing) or (syncInfo.sync_distance < SYNC_TOLERANCE):
|
|
if not(syncInfo.is_optimistic.get(false)):
|
|
info "Beacon node is in sync", sync_distance = syncInfo.sync_distance,
|
|
head_slot = syncInfo.head_slot, is_opimistic = optimistic
|
|
RestBeaconNodeStatus.Online
|
|
else:
|
|
warn "Beacon node is optimistically synced only",
|
|
sync_distance = syncInfo.sync_distance,
|
|
head_slot = syncInfo.head_slot, is_opimistic = optimistic
|
|
RestBeaconNodeStatus.NotSynced
|
|
else:
|
|
warn "Beacon node not in sync", sync_distance = syncInfo.sync_distance,
|
|
head_slot = syncInfo.head_slot, is_opimistic = optimistic
|
|
RestBeaconNodeStatus.NotSynced
|
|
|
|
proc checkOnline(node: BeaconNodeServerRef) {.async.} =
|
|
logScope: endpoint = node
|
|
debug "Checking beacon node status"
|
|
let agent =
|
|
try:
|
|
let res = await node.client.getNodeVersion()
|
|
res.data.data
|
|
except CancelledError as exc:
|
|
debug "Status request was interrupted"
|
|
node.status = RestBeaconNodeStatus.Offline
|
|
raise exc
|
|
except RestError as exc:
|
|
debug "Unable to check beacon node's status",
|
|
error_name = exc.name, error_message = exc.msg
|
|
node.status = RestBeaconNodeStatus.Offline
|
|
return
|
|
except CatchableError as exc:
|
|
error "Unexpected exception", error_name = exc.name,
|
|
error_message = exc.msg
|
|
node.status = RestBeaconNodeStatus.Offline
|
|
return
|
|
info "Beacon node has been identified", agent = agent.version
|
|
node.ident = some(agent.version)
|
|
node.status = RestBeaconNodeStatus.Online
|
|
|
|
proc checkNode(vc: ValidatorClientRef,
|
|
node: BeaconNodeServerRef) {.async.} =
|
|
debug "Checking beacon node", endpoint = node
|
|
await node.checkOnline()
|
|
if node.status != RestBeaconNodeStatus.Online:
|
|
return
|
|
await vc.checkCompatible(node)
|
|
if node.status != RestBeaconNodeStatus.Online:
|
|
return
|
|
await vc.checkSync(node)
|
|
|
|
proc checkNodes*(service: FallbackServiceRef) {.async.} =
|
|
let
|
|
nodesToCheck = service.client.unusableNodes()
|
|
pendingChecks = nodesToCheck.mapIt(service.client.checkNode(it))
|
|
|
|
try:
|
|
await allFutures(pendingChecks)
|
|
except CancelledError as exc:
|
|
var pending: seq[Future[void]]
|
|
for future in pendingChecks:
|
|
if not(future.finished()):
|
|
pending.add(future.cancelAndWait())
|
|
await allFutures(pending)
|
|
raise exc
|
|
|
|
proc mainLoop(service: FallbackServiceRef) {.async.} =
|
|
let vc = service.client
|
|
service.state = ServiceState.Running
|
|
debug "Service started"
|
|
|
|
while true:
|
|
# This loop could look much more nicer/better, when
|
|
# https://github.com/nim-lang/Nim/issues/19911 will be fixed, so it could
|
|
# become safe to combine loops, breaks and exception handlers.
|
|
let breakLoop =
|
|
try:
|
|
await service.checkNodes()
|
|
await sleepAsync(2.seconds)
|
|
if service.client.onlineNodesCount() != 0:
|
|
service.onlineEvent.fire()
|
|
else:
|
|
let counter = vc.getNodeCounts()
|
|
warn "No suitable beacon nodes available",
|
|
online_nodes = counter.online,
|
|
offline_nodes = counter.offline,
|
|
uninitalized_nodes = counter.uninitalized,
|
|
incompatible_nodes = counter.incompatible,
|
|
nonsynced_nodes = counter.nosync,
|
|
total_nodes = len(vc.beaconNodes)
|
|
false
|
|
except CancelledError as exc:
|
|
debug "Service interrupted"
|
|
true
|
|
except CatchableError as exc:
|
|
warn "Service crashed with unexpected error", err_name = exc.name,
|
|
err_msg = exc.msg
|
|
true
|
|
|
|
if breakLoop:
|
|
break
|
|
|
|
proc init*(t: typedesc[FallbackServiceRef],
|
|
vc: ValidatorClientRef): Future[FallbackServiceRef] {.async.} =
|
|
logScope: service = ServiceName
|
|
var res = FallbackServiceRef(name: ServiceName, client: vc,
|
|
state: ServiceState.Initialized,
|
|
onlineEvent: newAsyncEvent())
|
|
debug "Initializing service"
|
|
# Perform initial nodes check.
|
|
await res.checkNodes()
|
|
return res
|
|
|
|
proc start*(service: FallbackServiceRef) =
|
|
service.lifeFut = mainLoop(service)
|