288 lines
9.8 KiB
Nim
288 lines
9.8 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
|
|
|
|
proc nodesCount*(vc: ValidatorClientRef,
|
|
statuses: set[RestBeaconNodeStatus],
|
|
roles: set[BeaconNodeRole] = {}): int =
|
|
if len(roles) == 0:
|
|
vc.beaconNodes.countIt(it.status in statuses)
|
|
else:
|
|
vc.beaconNodes.countIt((it.roles * roles != {}) and (it.status in statuses))
|
|
|
|
proc filterNodes*(vc: ValidatorClientRef, statuses: set[RestBeaconNodeStatus],
|
|
roles: set[BeaconNodeRole] = {}): seq[BeaconNodeServerRef] =
|
|
if len(roles) == 0:
|
|
vc.beaconNodes.filterIt(it.status in statuses)
|
|
else:
|
|
vc.beaconNodes.filterIt((it.roles * roles != {}) and
|
|
(it.status in statuses))
|
|
|
|
proc otherNodes*(vc: ValidatorClientRef): seq[BeaconNodeServerRef] =
|
|
vc.beaconNodes.filterIt(it.status != RestBeaconNodeStatus.Synced)
|
|
|
|
proc otherNodesCount*(vc: ValidatorClientRef): int =
|
|
vc.beaconNodes.countIt(it.status != RestBeaconNodeStatus.Synced)
|
|
|
|
proc waitNodes*(vc: ValidatorClientRef, timeoutFut: Future[void],
|
|
statuses: set[RestBeaconNodeStatus],
|
|
roles: set[BeaconNodeRole], waitChanges: bool) {.async.} =
|
|
doAssert(not(isNil(vc.fallbackService)))
|
|
var iterations = 0
|
|
while true:
|
|
if not(waitChanges) or (iterations != 0):
|
|
if vc.nodesCount(statuses, roles) != 0:
|
|
break
|
|
|
|
if vc.fallbackService.changesEvent.isSet():
|
|
vc.fallbackService.changesEvent.clear()
|
|
|
|
if isNil(timeoutFut):
|
|
await vc.fallbackService.changesEvent.wait()
|
|
else:
|
|
let breakLoop =
|
|
block:
|
|
let waitFut = vc.fallbackService.changesEvent.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
|
|
|
|
inc(iterations)
|
|
|
|
proc checkCompatible(
|
|
vc: ValidatorClientRef,
|
|
node: BeaconNodeServerRef
|
|
): Future[RestBeaconNodeStatus] {.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"
|
|
raise exc
|
|
except RestError as exc:
|
|
if node.status != RestBeaconNodeStatus.Offline:
|
|
debug "Unable to obtain beacon node's configuration",
|
|
error_name = exc.name, error_message = exc.msg
|
|
return RestBeaconNodeStatus.Offline
|
|
except CatchableError as exc:
|
|
if node.status != RestBeaconNodeStatus.Offline:
|
|
error "Unexpected exception", error_name = exc.name,
|
|
error_message = exc.msg
|
|
return RestBeaconNodeStatus.Offline
|
|
|
|
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"
|
|
raise exc
|
|
except RestError as exc:
|
|
if node.status != RestBeaconNodeStatus.Offline:
|
|
debug "Unable to obtain beacon node's genesis",
|
|
error_name = exc.name, error_message = exc.msg
|
|
return RestBeaconNodeStatus.Offline
|
|
except CatchableError as exc:
|
|
if node.status != RestBeaconNodeStatus.Offline:
|
|
error "Unexpected exception", error_name = exc.name,
|
|
error_message = exc.msg
|
|
return RestBeaconNodeStatus.Offline
|
|
|
|
let
|
|
genesisFlag = (genesis != vc.beaconGenesis)
|
|
configFlag = not(checkConfig(info))
|
|
|
|
node.config = some(info)
|
|
node.genesis = some(genesis)
|
|
let res =
|
|
if configFlag or genesisFlag:
|
|
if node.status != RestBeaconNodeStatus.Incompatible:
|
|
warn "Beacon node has incompatible configuration",
|
|
genesis_flag = genesisFlag, config_flag = configFlag
|
|
RestBeaconNodeStatus.Incompatible
|
|
else:
|
|
RestBeaconNodeStatus.Compatible
|
|
return res
|
|
|
|
proc checkSync(
|
|
vc: ValidatorClientRef,
|
|
node: BeaconNodeServerRef
|
|
): Future[RestBeaconNodeStatus] {.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"
|
|
raise exc
|
|
except RestError as exc:
|
|
if node.status != RestBeaconNodeStatus.Offline:
|
|
debug "Unable to obtain beacon node's sync status",
|
|
error_name = exc.name, error_message = exc.msg
|
|
return RestBeaconNodeStatus.Offline
|
|
except CatchableError as exc:
|
|
if node.status != RestBeaconNodeStatus.Offline:
|
|
error "Unexpected exception", error_name = exc.name,
|
|
error_message = exc.msg
|
|
return RestBeaconNodeStatus.Offline
|
|
node.syncInfo = some(syncInfo)
|
|
let res =
|
|
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)):
|
|
RestBeaconNodeStatus.Synced
|
|
else:
|
|
RestBeaconNodeStatus.OptSynced
|
|
else:
|
|
RestBeaconNodeStatus.NotSynced
|
|
return res
|
|
|
|
proc checkOnline(
|
|
node: BeaconNodeServerRef
|
|
): Future[RestBeaconNodeStatus] {.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"
|
|
raise exc
|
|
except RestError as exc:
|
|
debug "Unable to check beacon node's status",
|
|
error_name = exc.name, error_message = exc.msg
|
|
return RestBeaconNodeStatus.Offline
|
|
except CatchableError as exc:
|
|
error "Unexpected exception", error_name = exc.name,
|
|
error_message = exc.msg
|
|
return RestBeaconNodeStatus.Offline
|
|
node.ident = some(agent.version)
|
|
return RestBeaconNodeStatus.Online
|
|
|
|
proc checkNode(vc: ValidatorClientRef,
|
|
node: BeaconNodeServerRef): Future[bool] {.async.} =
|
|
let nstatus = node.status
|
|
debug "Checking beacon node", endpoint = node, status = node.status
|
|
|
|
if nstatus in {RestBeaconNodeStatus.Offline,
|
|
RestBeaconNodeStatus.Unexpected,
|
|
RestBeaconNodeStatus.InternalError}:
|
|
let status = await node.checkOnline()
|
|
node.updateStatus(status)
|
|
if status != RestBeaconNodeStatus.Online:
|
|
return nstatus != status
|
|
|
|
if nstatus in {RestBeaconNodeStatus.Offline,
|
|
RestBeaconNodeStatus.Unexpected,
|
|
RestBeaconNodeStatus.InternalError,
|
|
RestBeaconNodeStatus.Online,
|
|
RestBeaconNodeStatus.Incompatible}:
|
|
let status = await vc.checkCompatible(node)
|
|
node.updateStatus(status)
|
|
if status != RestBeaconNodeStatus.Compatible:
|
|
return nstatus != status
|
|
|
|
if nstatus in {RestBeaconNodeStatus.Offline,
|
|
RestBeaconNodeStatus.Unexpected,
|
|
RestBeaconNodeStatus.InternalError,
|
|
RestBeaconNodeStatus.Online,
|
|
RestBeaconNodeStatus.Incompatible,
|
|
RestBeaconNodeStatus.Compatible,
|
|
RestBeaconNodeStatus.OptSynced,
|
|
RestBeaconNodeStatus.NotSynced}:
|
|
let status = await vc.checkSync(node)
|
|
node.updateStatus(status)
|
|
return nstatus != status
|
|
|
|
proc checkNodes*(service: FallbackServiceRef): Future[bool] {.async.} =
|
|
let
|
|
nodesToCheck = service.client.otherNodes()
|
|
pendingChecks = nodesToCheck.mapIt(service.client.checkNode(it))
|
|
var res = false
|
|
try:
|
|
await allFutures(pendingChecks)
|
|
for fut in pendingChecks:
|
|
if fut.completed() and fut.read():
|
|
res = true
|
|
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
|
|
return res
|
|
|
|
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:
|
|
if await service.checkNodes(): service.changesEvent.fire()
|
|
await sleepAsync(2.seconds)
|
|
false
|
|
except CancelledError as exc:
|
|
debug "Service interrupted"
|
|
true
|
|
except CatchableError as exc:
|
|
error "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,
|
|
changesEvent: newAsyncEvent())
|
|
debug "Initializing service"
|
|
# Perform initial nodes check.
|
|
if await res.checkNodes(): res.changesEvent.fire()
|
|
return res
|
|
|
|
proc start*(service: FallbackServiceRef) =
|
|
service.lifeFut = mainLoop(service)
|