nimbus-eth2/beacon_chain/consensus_object_pools/consensus_manager.nim

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# beacon_chain
# Copyright (c) 2018-2023 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: [].}
import
chronicles, chronos, web3/[primitives, engine_api_types],
../spec/datatypes/base,
../consensus_object_pools/[blockchain_dag, block_quarantine, attestation_pool],
../el/el_manager,
Support for driving multiple EL nodes from a single Nimbus BN (#4465) * Support for driving multiple EL nodes from a single Nimbus BN Full list of changes: * Eth1Monitor has been renamed to ELManager to match its current responsibilities better. * The ELManager is no longer optional in the code (it won't have a nil value under any circumstances). * The support for subscribing for headers was removed as it only worked with WebSockets and contributed significant complexity while bringing only a very minor advantage. * The `--web3-url` parameter has been deprecated in favor of a new `--el` parameter. The new parameter has a reasonable default value and supports specifying a different JWT for each connection. Each connection can also be configured with a different set of responsibilities (e.g. download deposits, validate blocks and/or produce blocks). On the command-line, these properties can be configured through URL properties stored in the #anchor part of the URL. In TOML files, they come with a very natural syntax (althrough the URL scheme is also supported). * The previously scattered EL-related state and logic is now moved to `eth1_monitor.nim` (this module will be renamed to `el_manager.nim` in a follow-up commit). State is assigned properly either to the `ELManager` or the to individual `ELConnection` objects where appropriate. The ELManager executes all Engine API requests against all attached EL nodes, in parallel. It compares their results and if there is a disagreement regarding the validity of a certain payload, this is detected and the beacon node is protected from publishing a block with a potential execution layer consensus bug in it. The BN provides metrics per EL node for the number of successful or failed requests for each type Engine API requests. If an EL node goes offline and connectivity is resoted later, we report the problem and the remedy in edge-triggered fashion. * More progress towards implementing Deneb block production in the VC and comparing the value of blocks produced by the EL and the builder API. * Adds a Makefile target for the zhejiang testnet
2023-03-05 01:40:21 +00:00
../beacon_clock
from ../spec/beaconstate import
get_expected_withdrawals, has_eth1_withdrawal_credential
from ../spec/datatypes/capella import Withdrawal
from ../spec/eth2_apis/dynamic_fee_recipients import
DynamicFeeRecipientsStore, getDynamicFeeRecipient
from ../validators/keystore_management import
KeymanagerHost, getPerValidatorDefaultFeeRecipient, getSuggestedFeeRecipient,
getSuggestedGasLimit
from ../validators/action_tracker import ActionTracker, getNextProposalSlot
type
ConsensusManager* = object
expectedSlot: Slot
expectedBlockReceived: Future[bool]
# Validated & Verified
# ----------------------------------------------------------------
dag*: ChainDAGRef
attestationPool*: ref AttestationPool
# Missing info
# ----------------------------------------------------------------
quarantine*: ref Quarantine
# Execution layer integration
# ----------------------------------------------------------------
Support for driving multiple EL nodes from a single Nimbus BN (#4465) * Support for driving multiple EL nodes from a single Nimbus BN Full list of changes: * Eth1Monitor has been renamed to ELManager to match its current responsibilities better. * The ELManager is no longer optional in the code (it won't have a nil value under any circumstances). * The support for subscribing for headers was removed as it only worked with WebSockets and contributed significant complexity while bringing only a very minor advantage. * The `--web3-url` parameter has been deprecated in favor of a new `--el` parameter. The new parameter has a reasonable default value and supports specifying a different JWT for each connection. Each connection can also be configured with a different set of responsibilities (e.g. download deposits, validate blocks and/or produce blocks). On the command-line, these properties can be configured through URL properties stored in the #anchor part of the URL. In TOML files, they come with a very natural syntax (althrough the URL scheme is also supported). * The previously scattered EL-related state and logic is now moved to `eth1_monitor.nim` (this module will be renamed to `el_manager.nim` in a follow-up commit). State is assigned properly either to the `ELManager` or the to individual `ELConnection` objects where appropriate. The ELManager executes all Engine API requests against all attached EL nodes, in parallel. It compares their results and if there is a disagreement regarding the validity of a certain payload, this is detected and the beacon node is protected from publishing a block with a potential execution layer consensus bug in it. The BN provides metrics per EL node for the number of successful or failed requests for each type Engine API requests. If an EL node goes offline and connectivity is resoted later, we report the problem and the remedy in edge-triggered fashion. * More progress towards implementing Deneb block production in the VC and comparing the value of blocks produced by the EL and the builder API. * Adds a Makefile target for the zhejiang testnet
2023-03-05 01:40:21 +00:00
elManager*: ELManager
# Allow determination of whether there's an upcoming proposal
# ----------------------------------------------------------------
actionTracker*: ActionTracker
# Allow determination of preferred fee recipient during proposals
# ----------------------------------------------------------------
dynamicFeeRecipientsStore: ref DynamicFeeRecipientsStore
validatorsDir: string
defaultFeeRecipient: Opt[Eth1Address]
defaultGasLimit: uint64
# Tracking last proposal forkchoiceUpdated payload information
# ----------------------------------------------------------------
optimisticHead: tuple[bid: BlockId, execution_block_hash: Eth2Digest]
# Initialization
# ------------------------------------------------------------------------------
func new*(T: type ConsensusManager,
dag: ChainDAGRef,
attestationPool: ref AttestationPool,
quarantine: ref Quarantine,
Support for driving multiple EL nodes from a single Nimbus BN (#4465) * Support for driving multiple EL nodes from a single Nimbus BN Full list of changes: * Eth1Monitor has been renamed to ELManager to match its current responsibilities better. * The ELManager is no longer optional in the code (it won't have a nil value under any circumstances). * The support for subscribing for headers was removed as it only worked with WebSockets and contributed significant complexity while bringing only a very minor advantage. * The `--web3-url` parameter has been deprecated in favor of a new `--el` parameter. The new parameter has a reasonable default value and supports specifying a different JWT for each connection. Each connection can also be configured with a different set of responsibilities (e.g. download deposits, validate blocks and/or produce blocks). On the command-line, these properties can be configured through URL properties stored in the #anchor part of the URL. In TOML files, they come with a very natural syntax (althrough the URL scheme is also supported). * The previously scattered EL-related state and logic is now moved to `eth1_monitor.nim` (this module will be renamed to `el_manager.nim` in a follow-up commit). State is assigned properly either to the `ELManager` or the to individual `ELConnection` objects where appropriate. The ELManager executes all Engine API requests against all attached EL nodes, in parallel. It compares their results and if there is a disagreement regarding the validity of a certain payload, this is detected and the beacon node is protected from publishing a block with a potential execution layer consensus bug in it. The BN provides metrics per EL node for the number of successful or failed requests for each type Engine API requests. If an EL node goes offline and connectivity is resoted later, we report the problem and the remedy in edge-triggered fashion. * More progress towards implementing Deneb block production in the VC and comparing the value of blocks produced by the EL and the builder API. * Adds a Makefile target for the zhejiang testnet
2023-03-05 01:40:21 +00:00
elManager: ELManager,
actionTracker: ActionTracker,
dynamicFeeRecipientsStore: ref DynamicFeeRecipientsStore,
validatorsDir: string,
defaultFeeRecipient: Opt[Eth1Address],
defaultGasLimit: uint64
): ref ConsensusManager =
(ref ConsensusManager)(
dag: dag,
attestationPool: attestationPool,
quarantine: quarantine,
Support for driving multiple EL nodes from a single Nimbus BN (#4465) * Support for driving multiple EL nodes from a single Nimbus BN Full list of changes: * Eth1Monitor has been renamed to ELManager to match its current responsibilities better. * The ELManager is no longer optional in the code (it won't have a nil value under any circumstances). * The support for subscribing for headers was removed as it only worked with WebSockets and contributed significant complexity while bringing only a very minor advantage. * The `--web3-url` parameter has been deprecated in favor of a new `--el` parameter. The new parameter has a reasonable default value and supports specifying a different JWT for each connection. Each connection can also be configured with a different set of responsibilities (e.g. download deposits, validate blocks and/or produce blocks). On the command-line, these properties can be configured through URL properties stored in the #anchor part of the URL. In TOML files, they come with a very natural syntax (althrough the URL scheme is also supported). * The previously scattered EL-related state and logic is now moved to `eth1_monitor.nim` (this module will be renamed to `el_manager.nim` in a follow-up commit). State is assigned properly either to the `ELManager` or the to individual `ELConnection` objects where appropriate. The ELManager executes all Engine API requests against all attached EL nodes, in parallel. It compares their results and if there is a disagreement regarding the validity of a certain payload, this is detected and the beacon node is protected from publishing a block with a potential execution layer consensus bug in it. The BN provides metrics per EL node for the number of successful or failed requests for each type Engine API requests. If an EL node goes offline and connectivity is resoted later, we report the problem and the remedy in edge-triggered fashion. * More progress towards implementing Deneb block production in the VC and comparing the value of blocks produced by the EL and the builder API. * Adds a Makefile target for the zhejiang testnet
2023-03-05 01:40:21 +00:00
elManager: elManager,
actionTracker: actionTracker,
dynamicFeeRecipientsStore: dynamicFeeRecipientsStore,
validatorsDir: validatorsDir,
defaultFeeRecipient: defaultFeeRecipient,
defaultGasLimit: defaultGasLimit
)
# Consensus Management
# -----------------------------------------------------------------------------------
proc checkExpectedBlock(self: var ConsensusManager) =
if self.expectedBlockReceived == nil:
return
if self.dag.head.slot < self.expectedSlot:
return
self.expectedBlockReceived.complete(true)
self.expectedBlockReceived = nil # Don't keep completed futures around!
proc expectBlock*(self: var ConsensusManager, expectedSlot: Slot): Future[bool] =
## Return a future that will complete when a head is selected whose slot is
## equal or greater than the given slot, or a new expectation is created
if self.expectedBlockReceived != nil:
# Reset the old future to not leave it hanging.. an alternative would be to
# cancel it, but it doesn't make any practical difference for now
self.expectedBlockReceived.complete(false)
let fut = newFuture[bool]("ConsensusManager.expectBlock")
self.expectedSlot = expectedSlot
self.expectedBlockReceived = fut
# It might happen that by the time we're expecting a block, it might have
# already been processed!
self.checkExpectedBlock()
return fut
func shouldSyncOptimistically*(
optimisticSlot, dagSlot, wallSlot: Slot): bool =
## Determine whether an optimistic execution block hash should be reported
## to the EL client instead of the current head as determined by fork choice.
# Check whether optimistic head is sufficiently ahead of DAG
const minProgress = 8 * SLOTS_PER_EPOCH # Set arbitrarily
if optimisticSlot < dagSlot or optimisticSlot - dagSlot < minProgress:
return false
# Check whether optimistic head has synced sufficiently close to wall slot
const maxAge = 2 * SLOTS_PER_EPOCH # Set arbitrarily
if optimisticSlot < max(wallSlot, maxAge.Slot) - maxAge:
return false
true
func shouldSyncOptimistically*(self: ConsensusManager, wallSlot: Slot): bool =
if self.optimisticHead.execution_block_hash.isZero:
return false
shouldSyncOptimistically(
optimisticSlot = self.optimisticHead.bid.slot,
dagSlot = getStateField(self.dag.headState, slot),
wallSlot = wallSlot)
func optimisticHead*(self: ConsensusManager): BlockId =
self.optimisticHead.bid
func optimisticExecutionPayloadHash*(self: ConsensusManager): Eth2Digest =
self.optimisticHead.execution_block_hash
func setOptimisticHead*(
self: var ConsensusManager,
bid: BlockId, execution_block_hash: Eth2Digest) =
self.optimisticHead = (bid: bid, execution_block_hash: execution_block_hash)
Support for driving multiple EL nodes from a single Nimbus BN (#4465) * Support for driving multiple EL nodes from a single Nimbus BN Full list of changes: * Eth1Monitor has been renamed to ELManager to match its current responsibilities better. * The ELManager is no longer optional in the code (it won't have a nil value under any circumstances). * The support for subscribing for headers was removed as it only worked with WebSockets and contributed significant complexity while bringing only a very minor advantage. * The `--web3-url` parameter has been deprecated in favor of a new `--el` parameter. The new parameter has a reasonable default value and supports specifying a different JWT for each connection. Each connection can also be configured with a different set of responsibilities (e.g. download deposits, validate blocks and/or produce blocks). On the command-line, these properties can be configured through URL properties stored in the #anchor part of the URL. In TOML files, they come with a very natural syntax (althrough the URL scheme is also supported). * The previously scattered EL-related state and logic is now moved to `eth1_monitor.nim` (this module will be renamed to `el_manager.nim` in a follow-up commit). State is assigned properly either to the `ELManager` or the to individual `ELConnection` objects where appropriate. The ELManager executes all Engine API requests against all attached EL nodes, in parallel. It compares their results and if there is a disagreement regarding the validity of a certain payload, this is detected and the beacon node is protected from publishing a block with a potential execution layer consensus bug in it. The BN provides metrics per EL node for the number of successful or failed requests for each type Engine API requests. If an EL node goes offline and connectivity is resoted later, we report the problem and the remedy in edge-triggered fashion. * More progress towards implementing Deneb block production in the VC and comparing the value of blocks produced by the EL and the builder API. * Adds a Makefile target for the zhejiang testnet
2023-03-05 01:40:21 +00:00
proc updateExecutionClientHead(self: ref ConsensusManager,
newHead: BeaconHead): Future[Opt[void]] {.async.} =
let headExecutionPayloadHash = self.dag.loadExecutionBlockHash(newHead.blck)
if headExecutionPayloadHash.isZero:
# Blocks without execution payloads can't be optimistic.
self.dag.markBlockVerified(newHead.blck)
return Opt[void].ok()
template callForkchoiceUpdated(attributes: untyped): auto =
Support for driving multiple EL nodes from a single Nimbus BN (#4465) * Support for driving multiple EL nodes from a single Nimbus BN Full list of changes: * Eth1Monitor has been renamed to ELManager to match its current responsibilities better. * The ELManager is no longer optional in the code (it won't have a nil value under any circumstances). * The support for subscribing for headers was removed as it only worked with WebSockets and contributed significant complexity while bringing only a very minor advantage. * The `--web3-url` parameter has been deprecated in favor of a new `--el` parameter. The new parameter has a reasonable default value and supports specifying a different JWT for each connection. Each connection can also be configured with a different set of responsibilities (e.g. download deposits, validate blocks and/or produce blocks). On the command-line, these properties can be configured through URL properties stored in the #anchor part of the URL. In TOML files, they come with a very natural syntax (althrough the URL scheme is also supported). * The previously scattered EL-related state and logic is now moved to `eth1_monitor.nim` (this module will be renamed to `el_manager.nim` in a follow-up commit). State is assigned properly either to the `ELManager` or the to individual `ELConnection` objects where appropriate. The ELManager executes all Engine API requests against all attached EL nodes, in parallel. It compares their results and if there is a disagreement regarding the validity of a certain payload, this is detected and the beacon node is protected from publishing a block with a potential execution layer consensus bug in it. The BN provides metrics per EL node for the number of successful or failed requests for each type Engine API requests. If an EL node goes offline and connectivity is resoted later, we report the problem and the remedy in edge-triggered fashion. * More progress towards implementing Deneb block production in the VC and comparing the value of blocks produced by the EL and the builder API. * Adds a Makefile target for the zhejiang testnet
2023-03-05 01:40:21 +00:00
await self.elManager.forkchoiceUpdated(
headBlockHash = headExecutionPayloadHash,
safeBlockHash = newHead.safeExecutionPayloadHash,
finalizedBlockHash = newHead.finalizedExecutionPayloadHash,
payloadAttributes = none attributes)
# Can't use dag.head here because it hasn't been updated yet
let
consensusFork =
self.dag.cfg.consensusForkAtEpoch(newHead.blck.bid.slot.epoch)
(payloadExecutionStatus, _) = withConsensusFork(consensusFork):
when consensusFork >= ConsensusFork.Bellatrix:
callForkchoiceUpdated(consensusFork.PayloadAttributes)
else:
callForkchoiceUpdated(PayloadAttributesV1)
case payloadExecutionStatus
of PayloadExecutionStatus.valid:
self.dag.markBlockVerified(newHead.blck)
of PayloadExecutionStatus.invalid, PayloadExecutionStatus.invalid_block_hash:
self.attestationPool[].forkChoice.mark_root_invalid(newHead.blck.root)
self.quarantine[].addUnviable(newHead.blck.root)
return Opt.none(void)
of PayloadExecutionStatus.accepted, PayloadExecutionStatus.syncing:
# Don't do anything. Either newHead.blck.executionValid was already false,
# in which case it'd be superfluous to set it to false again, or the block
# was marked as `VALID` in the `newPayload` path already, in which case it
# is fine to keep it as valid here. Conceptually, were this to be lines of
# code, it'd be something like
# if newHead.blck.executionValid:
# do nothing because of latter case
# else:
# do nothing because it's a no-op
# So, either way, do nothing.
discard
return Opt[void].ok()
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func getKnownValidatorsForBlsChangeTracking(
self: ConsensusManager, newHead: BlockRef): seq[ValidatorIndex] =
# Ensure that large nodes won't be overloaded by a nice-to-have, but
# inessential cosmetic feature.
const MAX_CHECKED_INDICES = 64
if newHead.bid.slot.epoch >= self.dag.cfg.CAPELLA_FORK_EPOCH:
var res = newSeqOfCap[ValidatorIndex](min(
len(self.actionTracker.knownValidators), MAX_CHECKED_INDICES))
for vi in self.actionTracker.knownValidators.keys():
res.add vi
if res.len >= MAX_CHECKED_INDICES:
break
res
else:
# It is not possible for any BLS to execution changes, for any validator,
# to have been yet processed.
# https://github.com/nim-lang/Nim/issues/19802
(static(@[]))
proc updateHead*(self: var ConsensusManager, newHead: BlockRef) =
## Trigger fork choice and update the DAG with the new head block
## This does not automatically prune the DAG after finalization
## `pruneFinalized` must be called for pruning.
# Store the new head in the chain DAG - this may cause epochs to be
# justified and finalized
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self.dag.updateHead(
newHead, self.quarantine[],
self.getKnownValidatorsForBlsChangeTracking(newHead))
self.checkExpectedBlock()
proc updateHead*(self: var ConsensusManager, wallSlot: Slot) =
## Trigger fork choice and update the DAG with the new head block
## This does not automatically prune the DAG after finalization
## `pruneFinalized` must be called for pruning.
# Grab the new head according to our latest attestation data
let newHead = self.attestationPool[].selectOptimisticHead(
limit by-root requests to non-finalized blocks (#3293) * limit by-root requests to non-finalized blocks Presently, we keep a mapping from block root to `BlockRef` in memory - this has simplified reasoning about the dag, but is not sustainable with the chain growing. We can distinguish between two cases where by-root access is useful: * unfinalized blocks - this is where the beacon chain is operating generally, by validating incoming data as interesting for future fork choice decisions - bounded by the length of the unfinalized period * finalized blocks - historical access in the REST API etc - no bounds, really In this PR, we limit the by-root block index to the first use case: finalized chain data can more efficiently be addressed by slot number. Future work includes: * limiting the `BlockRef` horizon in general - each instance is 40 bytes+overhead which adds up - this needs further refactoring to deal with the tail vs state problem * persisting the finalized slot-to-hash index - this one also keeps growing unbounded (albeit slowly) Anyway, this PR easily shaves ~128mb of memory usage at the time of writing. * No longer honor `BeaconBlocksByRoot` requests outside of the non-finalized period - previously, Nimbus would generously return any block through this libp2p request - per the spec, finalized blocks should be fetched via `BeaconBlocksByRange` instead. * return `Opt[BlockRef]` instead of `nil` when blocks can't be found - this becomes a lot more common now and thus deserves more attention * `dag.blocks` -> `dag.forkBlocks` - this index only carries unfinalized blocks from now - `finalizedBlocks` covers the other `BlockRef` instances * in backfill, verify that the last backfilled block leads back to genesis, or panic * add backfill timings to log * fix missing check that `BlockRef` block can be fetched with `getForkedBlock` reliably * shortcut doppelganger check when feature is not enabled * in REST/JSON-RPC, fetch blocks without involving `BlockRef` * fix dag.blocks ref
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wallSlot.start_beacon_time).valueOr:
warn "Head selection failed, using previous head",
head = shortLog(self.dag.head), wallSlot
return
if self.dag.loadExecutionBlockHash(newHead.blck).isZero:
# Blocks without execution payloads can't be optimistic.
self.dag.markBlockVerified(newHead.blck)
self.updateHead(newHead.blck)
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func isSynced(dag: ChainDAGRef, wallSlot: Slot): bool =
# This is a tweaked version of the beacon_validators isSynced. TODO, refactor
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# that one so this becomes the default version, with the same information to
# work with. For the head slot, use the DAG head regardless of what head the
# proposer forkchoiceUpdated is using, because by the beacon_validators might
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# be ready to actually propose, it's going to do so from the DAG head. Given
# the defaultSyncHorizon, it will start triggering in time so that potential
# discrepancies between the head here, and the head the DAG has (which might
# not yet be updated) won't be visible.
const defaultSyncHorizon = 50
if dag.head.slot + defaultSyncHorizon < wallSlot:
false
else:
dag.head.executionValid
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proc checkNextProposer(
dag: ChainDAGRef, actionTracker: ActionTracker,
dynamicFeeRecipientsStore: ref DynamicFeeRecipientsStore,
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wallSlot: Slot):
Opt[(ValidatorIndex, ValidatorPubKey)] =
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let nextWallSlot = wallSlot + 1
# Avoid long rewinds during syncing, when it's not going to propose. Though
# this is preparing for a proposal on `nextWallSlot`, it can't possibly yet
# be on said slot, so still check just `wallSlot`.
if not dag.isSynced(wallSlot):
return Opt.none((ValidatorIndex, ValidatorPubKey))
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let proposer = ? dag.getProposer(dag.head, nextWallSlot)
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if actionTracker.getNextProposalSlot(wallSlot) != nextWallSlot and
dynamicFeeRecipientsStore[].getDynamicFeeRecipient(
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proposer, nextWallSlot.epoch).isNone:
return Opt.none((ValidatorIndex, ValidatorPubKey))
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let proposerKey = dag.validatorKey(proposer).get().toPubKey
Opt.some((proposer, proposerKey))
proc checkNextProposer*(self: ref ConsensusManager, wallSlot: Slot):
Opt[(ValidatorIndex, ValidatorPubKey)] =
self.dag.checkNextProposer(
self.actionTracker, self.dynamicFeeRecipientsStore, wallSlot)
proc getFeeRecipient*(
self: ConsensusManager, pubkey: ValidatorPubKey,
validatorIdx: Opt[ValidatorIndex], epoch: Epoch): Eth1Address =
let dynFeeRecipient = if validatorIdx.isSome:
self.dynamicFeeRecipientsStore[].getDynamicFeeRecipient(
validatorIdx.get(), epoch)
else:
Opt.none(Eth1Address)
dynFeeRecipient.valueOr:
let
withdrawalAddress =
if validatorIdx.isSome:
withState(self.dag.headState):
if validatorIdx.get < forkyState.data.validators.lenu64:
let validator = forkyState.data.validators.item(validatorIdx.get)
if has_eth1_withdrawal_credential(validator):
var address: distinctBase(Eth1Address)
address[0..^1] = validator.withdrawal_credentials.data[12..^1]
Opt.some Eth1Address address
else:
Opt.none Eth1Address
else:
Opt.none Eth1Address
else:
Opt.none Eth1Address
defaultFeeRecipient = getPerValidatorDefaultFeeRecipient(
self.defaultFeeRecipient, withdrawalAddress)
self.validatorsDir.getSuggestedFeeRecipient(
pubkey, defaultFeeRecipient).valueOr:
# Ignore errors and use default - errors are logged in gsfr
defaultFeeRecipient
proc getGasLimit*(
self: ConsensusManager, pubkey: ValidatorPubKey): uint64 =
self.validatorsDir.getSuggestedGasLimit(
pubkey, self.defaultGasLimit).valueOr:
self.defaultGasLimit
from ../spec/datatypes/bellatrix import PayloadID
proc runProposalForkchoiceUpdated*(
self: ref ConsensusManager, wallSlot: Slot): Future[Opt[void]] {.async.} =
let
nextWallSlot = wallSlot + 1
(validatorIndex, nextProposer) = self.checkNextProposer(wallSlot).valueOr:
return err()
debug "runProposalForkchoiceUpdated: expected to be proposing next slot",
nextWallSlot, validatorIndex, nextProposer
# In Capella and later, computing correct withdrawals would mean creating a
# proposal state. Instead, only do that at proposal time.
if nextWallSlot.is_epoch:
debug "runProposalForkchoiceUpdated: not running early fcU for epoch-aligned proposal slot",
nextWallSlot, validatorIndex, nextProposer
return err()
# Approximately lines up with validator_duties version. Used optimistically/
# opportunistically, so mismatches are fine if not too frequent.
let
timestamp = withState(self.dag.headState):
compute_timestamp_at_slot(forkyState.data, nextWallSlot)
# If the current head block still forms the basis of the eventual proposal
# state, then its `get_randao_mix` will remain unchanged as well, as it is
# constant until the next block.
randomData = withState(self.dag.headState):
get_randao_mix(forkyState.data, get_current_epoch(forkyState.data)).data
feeRecipient = self[].getFeeRecipient(
nextProposer, Opt.some(validatorIndex), nextWallSlot.epoch)
beaconHead = self.attestationPool[].getBeaconHead(self.dag.head)
headBlockHash = self.dag.loadExecutionBlockHash(beaconHead.blck)
Support for driving multiple EL nodes from a single Nimbus BN (#4465) * Support for driving multiple EL nodes from a single Nimbus BN Full list of changes: * Eth1Monitor has been renamed to ELManager to match its current responsibilities better. * The ELManager is no longer optional in the code (it won't have a nil value under any circumstances). * The support for subscribing for headers was removed as it only worked with WebSockets and contributed significant complexity while bringing only a very minor advantage. * The `--web3-url` parameter has been deprecated in favor of a new `--el` parameter. The new parameter has a reasonable default value and supports specifying a different JWT for each connection. Each connection can also be configured with a different set of responsibilities (e.g. download deposits, validate blocks and/or produce blocks). On the command-line, these properties can be configured through URL properties stored in the #anchor part of the URL. In TOML files, they come with a very natural syntax (althrough the URL scheme is also supported). * The previously scattered EL-related state and logic is now moved to `eth1_monitor.nim` (this module will be renamed to `el_manager.nim` in a follow-up commit). State is assigned properly either to the `ELManager` or the to individual `ELConnection` objects where appropriate. The ELManager executes all Engine API requests against all attached EL nodes, in parallel. It compares their results and if there is a disagreement regarding the validity of a certain payload, this is detected and the beacon node is protected from publishing a block with a potential execution layer consensus bug in it. The BN provides metrics per EL node for the number of successful or failed requests for each type Engine API requests. If an EL node goes offline and connectivity is resoted later, we report the problem and the remedy in edge-triggered fashion. * More progress towards implementing Deneb block production in the VC and comparing the value of blocks produced by the EL and the builder API. * Adds a Makefile target for the zhejiang testnet
2023-03-05 01:40:21 +00:00
if headBlockHash.isZero:
return err()
try:
let safeBlockHash = beaconHead.safeExecutionPayloadHash
withState(self.dag.headState):
template callForkchoiceUpdated(fcPayloadAttributes: auto) =
let (status, _) = await self.elManager.forkchoiceUpdated(
headBlockHash, safeBlockHash,
beaconHead.finalizedExecutionPayloadHash,
payloadAttributes = some fcPayloadAttributes)
debug "Fork-choice updated for proposal", status
static: doAssert high(ConsensusFork) == ConsensusFork.Deneb
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when consensusFork >= ConsensusFork.Deneb:
callForkchoiceUpdated(PayloadAttributesV3(
timestamp: Quantity timestamp,
prevRandao: FixedBytes[32] randomData,
suggestedFeeRecipient: feeRecipient,
withdrawals:
toEngineWithdrawals get_expected_withdrawals(forkyState.data),
parentBeaconBlockRoot: beaconHead.blck.bid.root.asBlockHash))
elif consensusFork >= ConsensusFork.Capella:
callForkchoiceUpdated(PayloadAttributesV2(
timestamp: Quantity timestamp,
prevRandao: FixedBytes[32] randomData,
suggestedFeeRecipient: feeRecipient,
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withdrawals:
toEngineWithdrawals get_expected_withdrawals(forkyState.data)))
Support for driving multiple EL nodes from a single Nimbus BN (#4465) * Support for driving multiple EL nodes from a single Nimbus BN Full list of changes: * Eth1Monitor has been renamed to ELManager to match its current responsibilities better. * The ELManager is no longer optional in the code (it won't have a nil value under any circumstances). * The support for subscribing for headers was removed as it only worked with WebSockets and contributed significant complexity while bringing only a very minor advantage. * The `--web3-url` parameter has been deprecated in favor of a new `--el` parameter. The new parameter has a reasonable default value and supports specifying a different JWT for each connection. Each connection can also be configured with a different set of responsibilities (e.g. download deposits, validate blocks and/or produce blocks). On the command-line, these properties can be configured through URL properties stored in the #anchor part of the URL. In TOML files, they come with a very natural syntax (althrough the URL scheme is also supported). * The previously scattered EL-related state and logic is now moved to `eth1_monitor.nim` (this module will be renamed to `el_manager.nim` in a follow-up commit). State is assigned properly either to the `ELManager` or the to individual `ELConnection` objects where appropriate. The ELManager executes all Engine API requests against all attached EL nodes, in parallel. It compares their results and if there is a disagreement regarding the validity of a certain payload, this is detected and the beacon node is protected from publishing a block with a potential execution layer consensus bug in it. The BN provides metrics per EL node for the number of successful or failed requests for each type Engine API requests. If an EL node goes offline and connectivity is resoted later, we report the problem and the remedy in edge-triggered fashion. * More progress towards implementing Deneb block production in the VC and comparing the value of blocks produced by the EL and the builder API. * Adds a Makefile target for the zhejiang testnet
2023-03-05 01:40:21 +00:00
else:
callForkchoiceUpdated(PayloadAttributesV1(
timestamp: Quantity timestamp,
prevRandao: FixedBytes[32] randomData,
suggestedFeeRecipient: feeRecipient))
except CatchableError as err:
error "Engine API fork-choice update failed", err = err.msg
ok()
proc updateHeadWithExecution*(
self: ref ConsensusManager, initialNewHead: BeaconHead,
getBeaconTimeFn: GetBeaconTimeFn) {.async.} =
## Trigger fork choice and update the DAG with the new head block
## This does not automatically prune the DAG after finalization
## `pruneFinalized` must be called for pruning.
# Grab the new head according to our latest attestation data
try:
# Ensure dag.updateHead has most current information
var
attempts = 0
newHead = initialNewHead
while (await self.updateExecutionClientHead(newHead)).isErr:
# This proc is called on every new block; guarantee timely return
inc attempts
const maxAttempts = 5
if attempts >= maxAttempts:
warn "updateHeadWithExecution: too many attempts to recover from invalid payload",
attempts, maxAttempts, newHead, initialNewHead
break
# Select new head for next attempt
let
wallTime = getBeaconTimeFn()
nextHead = self.attestationPool[].selectOptimisticHead(wallTime).valueOr:
warn "Head selection failed after invalid block, using previous head",
newHead, wallSlot = wallTime.slotOrZero
break
warn "updateHeadWithExecution: attempting to recover from invalid payload",
attempts, maxAttempts, newHead, initialNewHead, nextHead
newHead = nextHead
# Store the new head in the chain DAG - this may cause epochs to be
# justified and finalized
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self.dag.updateHead(
newHead.blck, self.quarantine[],
self[].getKnownValidatorsForBlsChangeTracking(newHead.blck))
# If this node should propose next slot, start preparing payload. Both
# fcUs are useful: the updateExecutionClientHead(newHead) call updates
# the head state (including optimistic status) that self.dagUpdateHead
# needs while runProposalForkchoiceUpdated requires RANDAO information
# from the head state corresponding to the `newHead` block, which only
# self.dag.updateHead(...) sets up.
discard await self.runProposalForkchoiceUpdated(getBeaconTimeFn().slotOrZero)
self[].checkExpectedBlock()
except CatchableError as exc:
debug "updateHeadWithExecution error",
error = exc.msg
proc pruneStateCachesAndForkChoice*(self: var ConsensusManager) =
## Prune unneeded and invalidated data after finalization
## - the DAG state checkpoints
## - the DAG EpochRef
## - the attestation pool/fork choice
# Cleanup DAG & fork choice if we have a finalized head
if self.dag.needStateCachesAndForkChoicePruning():
self.dag.pruneStateCachesDAG()
self.attestationPool[].prune()