# beacon_chain # Copyright (c) 2018-2024 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: [].} # This module is responsible for handling beacon node validators, ie those that # that are running directly in the beacon node and not in a separate validator # client process - we name these "beacon validators" while those running # outside are "client validators". # This module also contains implementation logic for the REST validator API. import # Standard library std/[os, tables], # Nimble packages stew/[assign2, byteutils], chronos, metrics, chronicles, chronicles/timings, json_serialization/std/[options, sets, net], eth/db/kvstore, web3/primitives, kzg4844, # Local modules ../spec/datatypes/[phase0, altair, bellatrix], ../spec/[ eth2_merkleization, forks, helpers, network, signatures, state_transition, validator], ../consensus_object_pools/[ spec_cache, blockchain_dag, block_clearance, attestation_pool, sync_committee_msg_pool, validator_change_pool, consensus_manager, common_tools], ../el/el_manager, ../networking/eth2_network, ../sszdump, ../sync/sync_manager, ../gossip_processing/block_processor, ".."/[conf, beacon_clock, beacon_node], "."/[ keystore_management, slashing_protection, validator_duties, validator_pool], ".."/spec/mev/[rest_deneb_mev_calls, rest_electra_mev_calls] from std/sequtils import countIt, foldl, mapIt from eth/async_utils import awaitWithTimeout # Metrics for tracking attestation and beacon block loss declareCounter beacon_light_client_finality_updates_sent, "Number of LC finality updates sent by this peer" declareCounter beacon_light_client_optimistic_updates_sent, "Number of LC optimistic updates sent by this peer" declareCounter beacon_blocks_proposed, "Number of beacon chain blocks sent by this peer" declareCounter beacon_block_production_errors, "Number of times we failed to produce a block" # Metrics for tracking external block builder usage declareCounter beacon_block_builder_missed_with_fallback, "Number of beacon chain blocks where an attempt to use an external block builder failed with fallback" declareCounter beacon_block_builder_missed_without_fallback, "Number of beacon chain blocks where an attempt to use an external block builder failed without possible fallback" declareGauge(attached_validator_balance, "Validator balance at slot end of the first 64 validators, in Gwei", labels = ["pubkey"]) declarePublicGauge(attached_validator_balance_total, "Validator balance of all attached validators, in Gwei") logScope: topics = "beacval" type EngineBid* = object blck*: ForkedBeaconBlock executionPayloadValue*: Wei consensusBlockValue*: UInt256 blobsBundleOpt*: Opt[BlobsBundle] BuilderBid[SBBB] = object blindedBlckPart*: SBBB executionPayloadValue*: UInt256 consensusBlockValue*: UInt256 ForkedBlockResult = Result[EngineBid, string] BlindedBlockResult[SBBB] = Result[BuilderBid[SBBB], string] Bids[SBBB] = object engineBid: Opt[EngineBid] builderBid: Opt[BuilderBid[SBBB]] BoostFactorKind {.pure.} = enum Local, Builder BoostFactor = object case kind: BoostFactorKind of BoostFactorKind.Local: value8: uint8 of BoostFactorKind.Builder: value64: uint64 func init(t: typedesc[BoostFactor], value: uint8): BoostFactor = BoostFactor(kind: BoostFactorKind.Local, value8: value) func init(t: typedesc[BoostFactor], value: uint64): BoostFactor = BoostFactor(kind: BoostFactorKind.Builder, value64: value) proc getValidator*(validators: auto, pubkey: ValidatorPubKey): Opt[ValidatorAndIndex] = let idx = validators.findIt(it.pubkey == pubkey) if idx == -1: # We allow adding a validator even if its key is not in the state registry: # it might be that the deposit for this validator has not yet been processed Opt.none ValidatorAndIndex else: Opt.some ValidatorAndIndex(index: ValidatorIndex(idx), validator: validators[idx]) func blockConsensusValue(r: BlockRewards): UInt256 {.noinit.} = # Returns value of `block-consensus-value` in Wei units. u256(r.attestations + r.sync_aggregate + r.proposer_slashings + r.attester_slashings) * u256(1000000000) proc addValidatorsFromWeb3Signer( node: BeaconNode, web3signerUrl: Web3SignerUrl, epoch: Epoch) {.async: (raises: [CancelledError]).} = let dynamicStores = # Error is already reported via log warning. (await queryValidatorsSource(web3signerUrl)).valueOr( default(seq[KeystoreData])) for keystore in dynamicStores: let data = withState(node.dag.headState): getValidator(forkyState.data.validators.asSeq(), keystore.pubkey) index = if data.isSome(): Opt.some(data.get().index) else: Opt.none(ValidatorIndex) feeRecipient = node.consensusManager[].getFeeRecipient(keystore.pubkey, index, epoch) gasLimit = node.consensusManager[].getGasLimit(keystore.pubkey) v = node.attachedValidators[].addValidator(keystore, feeRecipient, gasLimit) node.attachedValidators[].updateValidator(v, data) proc addValidators*(node: BeaconNode) {.async: (raises: [CancelledError]).} = info "Loading validators", validatorsDir = node.config.validatorsDir(), keystore_cache_available = not(isNil(node.keystoreCache)) let epoch = node.currentSlot().epoch for keystore in listLoadableKeystores(node.config, node.keystoreCache): let data = withState(node.dag.headState): getValidator(forkyState.data.validators.asSeq(), keystore.pubkey) index = if data.isSome(): Opt.some(data.get().index) else: Opt.none(ValidatorIndex) feeRecipient = node.consensusManager[].getFeeRecipient( keystore.pubkey, index, epoch) gasLimit = node.consensusManager[].getGasLimit(keystore.pubkey) v = node.attachedValidators[].addValidator(keystore, feeRecipient, gasLimit) node.attachedValidators[].updateValidator(v, data) # We use `allFutures` because all failures are already reported as # user-visible warnings in `queryValidatorsSource`. # We don't consider them fatal because the Web3Signer may be experiencing # a temporary hiccup that will be resolved later. # TODO mapIt version fails at type deduction - figure out.. var futs: seq[Future[void].Raising([CancelledError])] for it in node.config.web3SignerUrls: futs.add node.addValidatorsFromWeb3Signer(it, epoch) await allFutures(futs) proc pollForDynamicValidators*(node: BeaconNode, web3signerUrl: Web3SignerUrl, intervalInSeconds: int) {.async: (raises: [CancelledError]).} = if intervalInSeconds == 0: return proc addValidatorProc(keystore: KeystoreData) = let epoch = node.currentSlot().epoch index = Opt.none(ValidatorIndex) feeRecipient = node.consensusManager[].getFeeRecipient(keystore.pubkey, index, epoch) gasLimit = node.consensusManager[].getGasLimit(keystore.pubkey) discard node.attachedValidators[].addValidator(keystore, feeRecipient, gasLimit) var timeout = seconds(intervalInSeconds) while true: await sleepAsync(timeout) timeout = block: let res = await queryValidatorsSource(web3signerUrl) if res.isOk(): let keystores = res.get() debug "Validators source has been polled for validators", keystores_found = len(keystores), web3signer_url = web3signerUrl.url node.attachedValidators.updateDynamicValidators(web3signerUrl, keystores, addValidatorProc) seconds(intervalInSeconds) else: # In case of error we going to repeat our call with much smaller # interval. seconds(5) proc getValidator*(node: BeaconNode, idx: ValidatorIndex): Opt[AttachedValidator] = let key = ? node.dag.validatorKey(idx) node.attachedValidators[].getValidator(key.toPubKey()) proc getValidatorForDuties*( node: BeaconNode, idx: ValidatorIndex, slot: Slot, slashingSafe = false): Opt[AttachedValidator] = let key = ? node.dag.validatorKey(idx) node.attachedValidators[].getValidatorForDuties( key.toPubKey(), slot, slashingSafe) proc getGraffitiBytes*( node: BeaconNode, validator: AttachedValidator): GraffitiBytes = getGraffiti(node.config.validatorsDir, node.config.defaultGraffitiBytes(), validator.pubkey) proc isSynced*(node: BeaconNode, head: BlockRef): bool = ## TODO This function is here as a placeholder for some better heurestics to ## determine if we're in sync and should be producing blocks and ## attestations. Generally, the problem is that slot time keeps advancing ## even when there are no blocks being produced, so there's no way to ## distinguish validators geniunely going missing from the node not being ## well connected (during a network split or an internet outage for ## example). It would generally be correct to simply keep running as if ## we were the only legit node left alive, but then we run into issues: ## with enough many empty slots, the validator pool is emptied leading ## to empty committees and lots of empty slot processing that will be ## thrown away as soon as we're synced again. let # The slot we should be at, according to the clock beaconTime = node.beaconClock.now() wallSlot = beaconTime.toSlot() # TODO if everyone follows this logic, the network will not recover from a # halt: nobody will be producing blocks because everone expects someone # else to do it not wallSlot.afterGenesis or head.slot + node.config.syncHorizon >= wallSlot.slot proc handleLightClientUpdates*(node: BeaconNode, slot: Slot) {.async: (raises: [CancelledError]).} = template pool: untyped = node.lightClientPool[] static: doAssert lightClientFinalityUpdateSlotOffset == lightClientOptimisticUpdateSlotOffset let sendTime = node.beaconClock.fromNow( slot.light_client_finality_update_time()) if sendTime.inFuture: debug "Waiting to send LC updates", slot, delay = shortLog(sendTime.offset) await sleepAsync(sendTime.offset) withForkyFinalityUpdate(node.dag.lcDataStore.cache.latest): when lcDataFork > LightClientDataFork.None: let signature_slot = forkyFinalityUpdate.signature_slot if slot != signature_slot: return let num_active_participants = forkyFinalityUpdate.sync_aggregate.num_active_participants if num_active_participants < MIN_SYNC_COMMITTEE_PARTICIPANTS: return let finalized_slot = forkyFinalityUpdate.finalized_header.beacon.slot has_supermajority = hasSupermajoritySyncParticipation(num_active_participants.uint64) newFinality = if finalized_slot > pool.latestForwardedFinalitySlot: true elif finalized_slot < pool.latestForwardedFinalitySlot: false elif pool.latestForwardedFinalityHasSupermajority: false else: has_supermajority if newFinality: template msg(): auto = forkyFinalityUpdate let sendResult = await node.network.broadcastLightClientFinalityUpdate(msg) # Optimization for message with ephemeral validity, whether sent or not pool.latestForwardedFinalitySlot = finalized_slot pool.latestForwardedFinalityHasSupermajority = has_supermajority if sendResult.isOk: beacon_light_client_finality_updates_sent.inc() notice "LC finality update sent", message = shortLog(msg) else: warn "LC finality update failed to send", error = sendResult.error() let attested_slot = forkyFinalityUpdate.attested_header.beacon.slot if attested_slot > pool.latestForwardedOptimisticSlot: let msg = forkyFinalityUpdate.toOptimistic let sendResult = await node.network.broadcastLightClientOptimisticUpdate(msg) # Optimization for message with ephemeral validity, whether sent or not pool.latestForwardedOptimisticSlot = attested_slot if sendResult.isOk: beacon_light_client_optimistic_updates_sent.inc() notice "LC optimistic update sent", message = shortLog(msg) else: warn "LC optimistic update failed to send", error = sendResult.error() proc createAndSendAttestation(node: BeaconNode, fork: Fork, genesis_validators_root: Eth2Digest, registered: RegisteredAttestation, subnet_id: SubnetId) {.async: (raises: [CancelledError]).} = let signature = block: let res = await registered.validator.getAttestationSignature( fork, genesis_validators_root, registered.data) if res.isErr(): warn "Unable to sign attestation", validator = shortLog(registered.validator), attestationData = shortLog(registered.data), error_msg = res.error() return res.get() epoch = registered.data.slot.epoch registered.validator.doppelgangerActivity(epoch) # Logged in the router let consensusFork = node.dag.cfg.consensusForkAtEpoch(epoch) res = if consensusFork >= ConsensusFork.Electra: await node.router.routeAttestation( registered.toElectraAttestation(signature), subnet_id, checkSignature = false, checkValidator = false) else: await node.router.routeAttestation( registered.toAttestation(signature), subnet_id, checkSignature = false, checkValidator = false) if not res.isOk(): return if node.config.dumpEnabled: dump( node.config.dumpDirOutgoing, registered.data, registered.validator.pubkey) proc getBlockProposalEth1Data*(node: BeaconNode, state: ForkedHashedBeaconState): BlockProposalEth1Data = let finalizedEpochRef = node.dag.getFinalizedEpochRef() result = node.elManager.getBlockProposalData( state, finalizedEpochRef.eth1_data, finalizedEpochRef.eth1_deposit_index) proc getFeeRecipient(node: BeaconNode, pubkey: ValidatorPubKey, validatorIdx: ValidatorIndex, epoch: Epoch): Eth1Address = node.consensusManager[].getFeeRecipient(pubkey, Opt.some(validatorIdx), epoch) proc getGasLimit(node: BeaconNode, pubkey: ValidatorPubKey): uint64 = node.consensusManager[].getGasLimit(pubkey) from web3/engine_api_types import PayloadExecutionStatus from ../spec/datatypes/capella import BeaconBlock, ExecutionPayload from ../spec/datatypes/deneb import BeaconBlock, ExecutionPayload, shortLog from ../spec/beaconstate import get_expected_withdrawals proc getExecutionPayload( PayloadType: type ForkyExecutionPayloadForSigning, node: BeaconNode, head: BlockRef, proposalState: ref ForkedHashedBeaconState, validator_index: ValidatorIndex): Future[Opt[PayloadType]] {.async: (raises: [CancelledError], raw: true).} = # https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/bellatrix/validator.md#executionpayload let epoch = withState(proposalState[]): forkyState.data.slot.epoch feeRecipient = block: let pubkey = node.dag.validatorKey(validator_index) if pubkey.isNone(): warn "Cannot get proposer pubkey, bug?", validator_index default(Eth1Address) else: node.getFeeRecipient(pubkey.get().toPubKey(), validator_index, epoch) beaconHead = node.attestationPool[].getBeaconHead(head) executionHead = withState(proposalState[]): when consensusFork >= ConsensusFork.Bellatrix: forkyState.data.latest_execution_payload_header.block_hash else: (static(default(Eth2Digest))) latestSafe = beaconHead.safeExecutionBlockHash latestFinalized = beaconHead.finalizedExecutionBlockHash timestamp = withState(proposalState[]): compute_timestamp_at_slot(forkyState.data, forkyState.data.slot) random = withState(proposalState[]): get_randao_mix(forkyState.data, get_current_epoch(forkyState.data)) withdrawals = withState(proposalState[]): when consensusFork >= ConsensusFork.Capella: get_expected_withdrawals(forkyState.data) else: @[] info "Requesting engine payload", beaconHead = shortLog(beaconHead.blck), executionHead = shortLog(executionHead), validatorIndex = validator_index, feeRecipient = $feeRecipient node.elManager.getPayload( PayloadType, beaconHead.blck.bid.root, executionHead, latestSafe, latestFinalized, timestamp, random, feeRecipient, withdrawals) # BlockRewards has issues resolving somehow otherwise import ".."/spec/state_transition_block proc makeBeaconBlockForHeadAndSlot*( PayloadType: type ForkyExecutionPayloadForSigning, node: BeaconNode, randao_reveal: ValidatorSig, validator_index: ValidatorIndex, graffiti: GraffitiBytes, head: BlockRef, slot: Slot, # These parameters are for the builder API execution_payload: Opt[PayloadType], transactions_root: Opt[Eth2Digest], execution_payload_root: Opt[Eth2Digest], withdrawals_root: Opt[Eth2Digest], kzg_commitments: Opt[KzgCommitments]): Future[ForkedBlockResult] {.async: (raises: [CancelledError]).} = # Advance state to the slot that we're proposing for var cache = StateCache() let # The clearance state already typically sits at the right slot per # `advanceClearanceState` # TODO can use `valueOr:`/`return err($error)` if/when # https://github.com/status-im/nim-stew/issues/161 is addressed maybeState = node.dag.getProposalState(head, slot, cache) if maybeState.isErr: beacon_block_production_errors.inc() return err($maybeState.error) let state = maybeState.get payloadFut = if execution_payload.isSome: # Builder API # In Capella, only get withdrawals root from relay. # The execution payload will be small enough to be safe to copy because # it won't have transactions (it's blinded) var modified_execution_payload = execution_payload withState(state[]): when consensusFork >= ConsensusFork.Capella and PayloadType.kind >= ConsensusFork.Capella: let withdrawals = List[Withdrawal, MAX_WITHDRAWALS_PER_PAYLOAD]( get_expected_withdrawals(forkyState.data)) if withdrawals_root.isNone or hash_tree_root(withdrawals) != withdrawals_root.get: # If engine API returned a block, will use that return err("Builder relay provided incorrect withdrawals root") # Otherwise, the state transition function notices that there are # too few withdrawals. assign(modified_execution_payload.get.executionPayload.withdrawals, withdrawals) let fut = Future[Opt[PayloadType]].Raising([CancelledError]).init( "given-payload") fut.complete(modified_execution_payload) fut elif slot.epoch < node.dag.cfg.BELLATRIX_FORK_EPOCH or not state[].is_merge_transition_complete: let fut = Future[Opt[PayloadType]].Raising([CancelledError]).init( "empty-payload") fut.complete(Opt.some(default(PayloadType))) fut else: # Create execution payload while packing attestations getExecutionPayload(PayloadType, node, head, state, validator_index) eth1Proposal = node.getBlockProposalEth1Data(state[]) if eth1Proposal.hasMissingDeposits: beacon_block_production_errors.inc() warn "Eth1 deposits not available. Skipping block proposal", slot return err("Eth1 deposits not available") let attestations = when PayloadType.kind == ConsensusFork.Electra: node.attestationPool[].getElectraAttestationsForBlock(state[], cache) else: node.attestationPool[].getAttestationsForBlock(state[], cache) exits = withState(state[]): node.validatorChangePool[].getBeaconBlockValidatorChanges( node.dag.cfg, forkyState.data) # TODO workaround for https://github.com/arnetheduck/nim-results/issues/34 payloadRes = await payloadFut payload = payloadRes.valueOr: beacon_block_production_errors.inc() warn "Unable to get execution payload. Skipping block proposal", slot, validator_index return err("Unable to get execution payload") let res = makeBeaconBlockWithRewards( node.dag.cfg, state[], validator_index, randao_reveal, eth1Proposal.vote, graffiti, attestations, eth1Proposal.deposits, exits, node.syncCommitteeMsgPool[].produceSyncAggregate(head.bid, slot), payload, noRollback, # Temporary state - no need for rollback cache, verificationFlags = {}, transactions_root = transactions_root, execution_payload_root = execution_payload_root, kzg_commitments = kzg_commitments).mapErr do (error: cstring) -> string: # This is almost certainly a bug, but it's complex enough that there's a # small risk it might happen even when most proposals succeed - thus we # log instead of asserting beacon_block_production_errors.inc() warn "Cannot create block for proposal", slot, head = shortLog(head), error $error var blobsBundleOpt = Opt.none(BlobsBundle) when typeof(payload).kind >= ConsensusFork.Deneb: blobsBundleOpt = Opt.some(payload.blobsBundle) if res.isOk: ok(EngineBid( blck: res.get().blck, executionPayloadValue: payload.blockValue, consensusBlockValue: res.get().rewards.blockConsensusValue(), blobsBundleOpt: blobsBundleOpt )) else: err(res.error) proc makeBeaconBlockForHeadAndSlot*( PayloadType: type ForkyExecutionPayloadForSigning, node: BeaconNode, randao_reveal: ValidatorSig, validator_index: ValidatorIndex, graffiti: GraffitiBytes, head: BlockRef, slot: Slot): Future[ForkedBlockResult] = return makeBeaconBlockForHeadAndSlot( PayloadType, node, randao_reveal, validator_index, graffiti, head, slot, execution_payload = Opt.none(PayloadType), transactions_root = Opt.none(Eth2Digest), execution_payload_root = Opt.none(Eth2Digest), withdrawals_root = Opt.none(Eth2Digest), kzg_commitments = Opt.none(KzgCommitments)) proc getBlindedExecutionPayload[ EPH: deneb_mev.BlindedExecutionPayloadAndBlobsBundle | electra_mev.BlindedExecutionPayloadAndBlobsBundle]( node: BeaconNode, payloadBuilderClient: RestClientRef, slot: Slot, executionBlockHash: Eth2Digest, pubkey: ValidatorPubKey): Future[BlindedBlockResult[EPH]] {.async: (raises: [CancelledError, RestError]).} = # Not ideal to use `when` where instead of splitting into separate functions, # but Nim doesn't overload on generic EPH type parameter. when EPH is deneb_mev.BlindedExecutionPayloadAndBlobsBundle: let response = awaitWithTimeout( payloadBuilderClient.getHeaderDeneb( slot, executionBlockHash, pubkey), BUILDER_PROPOSAL_DELAY_TOLERANCE): return err "Timeout obtaining Deneb blinded header from builder" res = decodeBytes( GetHeaderResponseDeneb, response.data, response.contentType) blindedHeader = res.valueOr: return err( "Unable to decode Deneb blinded header: " & $res.error & " with HTTP status " & $response.status & ", Content-Type " & $response.contentType & " and content " & $response.data) elif EPH is electra_mev.BlindedExecutionPayloadAndBlobsBundle: let response = awaitWithTimeout( payloadBuilderClient.getHeaderElectra( slot, executionBlockHash, pubkey), BUILDER_PROPOSAL_DELAY_TOLERANCE): return err "Timeout obtaining Electra blinded header from builder" res = decodeBytes( GetHeaderResponseElectra, response.data, response.contentType) blindedHeader = res.valueOr: return err( "Unable to decode Electra blinded header: " & $res.error & " with HTTP status " & $response.status & ", Content-Type " & $response.contentType & " and content " & $response.data) else: static: doAssert false const httpOk = 200 if response.status != httpOk: return err "getBlindedExecutionPayload: non-200 HTTP response" else: if not verify_builder_signature( node.dag.cfg.genesisFork, blindedHeader.data.message, blindedHeader.data.message.pubkey, blindedHeader.data.signature): return err "getBlindedExecutionPayload: signature verification failed" template builderBid: untyped = blindedHeader.data.message return ok(BuilderBid[EPH]( blindedBlckPart: EPH( execution_payload_header: builderBid.header, blob_kzg_commitments: builderBid.blob_kzg_commitments), executionPayloadValue: builderBid.value)) from ./message_router_mev import copyFields, getFieldNames, unblindAndRouteBlockMEV proc constructSignableBlindedBlock[T: deneb_mev.SignedBlindedBeaconBlock]( blck: deneb.BeaconBlock, blindedBundle: deneb_mev.BlindedExecutionPayloadAndBlobsBundle): T = # Leaves signature field default, to be filled in by caller const blckFields = getFieldNames(typeof(blck)) blckBodyFields = getFieldNames(typeof(blck.body)) var blindedBlock: T # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/validator.md#block-proposal copyFields(blindedBlock.message, blck, blckFields) copyFields(blindedBlock.message.body, blck.body, blckBodyFields) assign( blindedBlock.message.body.execution_payload_header, blindedBundle.execution_payload_header) assign( blindedBlock.message.body.blob_kzg_commitments, blindedBundle.blob_kzg_commitments) blindedBlock proc constructSignableBlindedBlock[T: electra_mev.SignedBlindedBeaconBlock]( blck: electra.BeaconBlock, blindedBundle: electra_mev.BlindedExecutionPayloadAndBlobsBundle): T = # Leaves signature field default, to be filled in by caller const blckFields = getFieldNames(typeof(blck)) blckBodyFields = getFieldNames(typeof(blck.body)) var blindedBlock: T # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/validator.md#block-proposal copyFields(blindedBlock.message, blck, blckFields) copyFields(blindedBlock.message.body, blck.body, blckBodyFields) assign( blindedBlock.message.body.execution_payload_header, blindedBundle.execution_payload_header) assign( blindedBlock.message.body.blob_kzg_commitments, blindedBundle.blob_kzg_commitments) debugComment "check for any additional electra mev requirements" blindedBlock func constructPlainBlindedBlock[T: deneb_mev.BlindedBeaconBlock]( blck: ForkyBeaconBlock, blindedBundle: deneb_mev.BlindedExecutionPayloadAndBlobsBundle): T = # https://github.com/nim-lang/Nim/issues/23020 workaround static: doAssert T is deneb_mev.BlindedBeaconBlock const blckFields = getFieldNames(typeof(blck)) blckBodyFields = getFieldNames(typeof(blck.body)) var blindedBlock: T # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/validator.md#block-proposal copyFields(blindedBlock, blck, blckFields) copyFields(blindedBlock.body, blck.body, blckBodyFields) assign( blindedBlock.body.execution_payload_header, blindedBundle.execution_payload_header) assign( blindedBlock.body.blob_kzg_commitments, blindedBundle.blob_kzg_commitments) blindedBlock func constructPlainBlindedBlock[T: electra_mev.BlindedBeaconBlock]( blck: ForkyBeaconBlock, blindedBundle: electra_mev.BlindedExecutionPayloadAndBlobsBundle): T = # https://github.com/nim-lang/Nim/issues/23020 workaround static: doAssert T is electra_mev.BlindedBeaconBlock const blckFields = getFieldNames(typeof(blck)) blckBodyFields = getFieldNames(typeof(blck.body)) var blindedBlock: T # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/validator.md#block-proposal copyFields(blindedBlock, blck, blckFields) copyFields(blindedBlock.body, blck.body, blckBodyFields) assign( blindedBlock.body.execution_payload_header, blindedBundle.execution_payload_header) assign( blindedBlock.body.blob_kzg_commitments, blindedBundle.blob_kzg_commitments) debugComment "check for any additional electra mev requirements" blindedBlock proc blindedBlockCheckSlashingAndSign[ T: deneb_mev.SignedBlindedBeaconBlock | electra_mev.SignedBlindedBeaconBlock]( node: BeaconNode, slot: Slot, validator: AttachedValidator, validator_index: ValidatorIndex, nonsignedBlindedBlock: T): Future[Result[T, string]] {.async: (raises: [CancelledError]).} = # Check with slashing protection before submitBlindedBlock let fork = node.dag.forkAtEpoch(slot.epoch) genesis_validators_root = node.dag.genesis_validators_root blockRoot = hash_tree_root(nonsignedBlindedBlock.message) signingRoot = compute_block_signing_root( fork, genesis_validators_root, slot, blockRoot) notSlashable = node.attachedValidators .slashingProtection .registerBlock(validator_index, validator.pubkey, slot, signingRoot) if notSlashable.isErr: warn "Slashing protection activated for MEV block", blockRoot = shortLog(blockRoot), blck = shortLog(nonsignedBlindedBlock), signingRoot = shortLog(signingRoot), validator = validator.pubkey, slot = slot, existingProposal = notSlashable.error return err("MEV proposal would be slashable: " & $notSlashable.error) var blindedBlock = nonsignedBlindedBlock blindedBlock.signature = block: let res = await validator.getBlockSignature( fork, genesis_validators_root, slot, blockRoot, blindedBlock.message) if res.isErr(): return err("Unable to sign block: " & res.error()) res.get() return ok blindedBlock proc getUnsignedBlindedBeaconBlock[ T: deneb_mev.SignedBlindedBeaconBlock | electra_mev.SignedBlindedBeaconBlock]( node: BeaconNode, slot: Slot, validator_index: ValidatorIndex, forkedBlock: ForkedBeaconBlock, executionPayloadHeader: deneb_mev.BlindedExecutionPayloadAndBlobsBundle | electra_mev.BlindedExecutionPayloadAndBlobsBundle): Result[T, string] = withBlck(forkedBlock): when consensusFork >= ConsensusFork.Deneb: when not ( (T is deneb_mev.SignedBlindedBeaconBlock and consensusFork == ConsensusFork.Deneb) or (T is electra_mev.SignedBlindedBeaconBlock and consensusFork == ConsensusFork.Electra)): return err("getUnsignedBlindedBeaconBlock: mismatched block/payload types") else: return ok constructSignableBlindedBlock[T]( forkyBlck, executionPayloadHeader) else: return err("getUnsignedBlindedBeaconBlock: attempt to construct pre-Deneb blinded block") proc getBlindedBlockParts[ EPH: deneb_mev.BlindedExecutionPayloadAndBlobsBundle | electra_mev.BlindedExecutionPayloadAndBlobsBundle]( node: BeaconNode, payloadBuilderClient: RestClientRef, head: BlockRef, pubkey: ValidatorPubKey, slot: Slot, randao: ValidatorSig, validator_index: ValidatorIndex, graffiti: GraffitiBytes): Future[Result[(EPH, UInt256, UInt256, ForkedBeaconBlock), string]] {.async: (raises: [CancelledError]).} = let executionBlockHash = node.dag.loadExecutionBlockHash(head).valueOr: # With checkpoint sync, the checkpoint block may be unavailable, # and it could already be the parent of the new block before backfill. # Fallback to EL, hopefully the block is available on the local path. warn "Failed to load parent execution block hash, skipping block builder", slot, validator_index, head = shortLog(head) return err("loadExecutionBlockHash failed") executionPayloadHeader = try: awaitWithTimeout( getBlindedExecutionPayload[EPH]( node, payloadBuilderClient, slot, executionBlockHash, pubkey), BUILDER_PROPOSAL_DELAY_TOLERANCE): BlindedBlockResult[EPH].err("getBlindedExecutionPayload timed out") except RestDecodingError as exc: BlindedBlockResult[EPH].err( "getBlindedExecutionPayload REST decoding error: " & exc.msg) except RestError as exc: BlindedBlockResult[EPH].err( "getBlindedExecutionPayload REST error: " & exc.msg) if executionPayloadHeader.isErr: warn "Could not obtain blinded execution payload header", error = executionPayloadHeader.error, slot, validator_index, head = shortLog(head) # Haven't committed to the MEV block, so allow EL fallback. return err(executionPayloadHeader.error) # When creating this block, need to ensure it uses the MEV-provided execution # payload, both to avoid repeated calls to network services and to ensure the # consistency of this block (e.g., its state root being correct). Since block # processing does not work directly using blinded blocks, fix up transactions # root after running the state transition function on an otherwise equivalent # non-blinded block without transactions. # # This doesn't have withdrawals, which each node has regardless of engine or # builder API. makeBeaconBlockForHeadAndSlot fills it in later. when EPH is deneb_mev.BlindedExecutionPayloadAndBlobsBundle: type PayloadType = deneb.ExecutionPayloadForSigning template actualEPH: untyped = executionPayloadHeader.get.blindedBlckPart.execution_payload_header let withdrawals_root = Opt.some actualEPH.withdrawals_root kzg_commitments = Opt.some( executionPayloadHeader.get.blindedBlckPart.blob_kzg_commitments) var shimExecutionPayload: PayloadType type DenebEPH = deneb_mev.BlindedExecutionPayloadAndBlobsBundle.execution_payload_header copyFields( shimExecutionPayload.executionPayload, actualEPH, getFieldNames(DenebEPH)) elif EPH is electra_mev.BlindedExecutionPayloadAndBlobsBundle: type PayloadType = electra.ExecutionPayloadForSigning template actualEPH: untyped = executionPayloadHeader.get.blindedBlckPart.execution_payload_header let withdrawals_root = Opt.some actualEPH.withdrawals_root kzg_commitments = Opt.some( executionPayloadHeader.get.blindedBlckPart.blob_kzg_commitments) var shimExecutionPayload: PayloadType type ElectraEPH = electra_mev.BlindedExecutionPayloadAndBlobsBundle.execution_payload_header copyFields( shimExecutionPayload.executionPayload, actualEPH, getFieldNames(ElectraEPH)) else: static: doAssert false let newBlock = await makeBeaconBlockForHeadAndSlot( PayloadType, node, randao, validator_index, graffiti, head, slot, execution_payload = Opt.some shimExecutionPayload, transactions_root = Opt.some actualEPH.transactions_root, execution_payload_root = Opt.some hash_tree_root(actualEPH), withdrawals_root = withdrawals_root, kzg_commitments = kzg_commitments) if newBlock.isErr(): # Haven't committed to the MEV block, so allow EL fallback. return err(newBlock.error) # already logged elsewhere! let forkedBlck = newBlock.get() return ok( (executionPayloadHeader.get.blindedBlckPart, executionPayloadHeader.get.executionPayloadValue, forkedBlck.consensusBlockValue, forkedBlck.blck)) proc getBuilderBid[ SBBB: deneb_mev.SignedBlindedBeaconBlock | electra_mev.SignedBlindedBeaconBlock]( node: BeaconNode, payloadBuilderClient: RestClientRef, head: BlockRef, validator_pubkey: ValidatorPubKey, slot: Slot, randao: ValidatorSig, graffitiBytes: GraffitiBytes, validator_index: ValidatorIndex): Future[BlindedBlockResult[SBBB]] {.async: (raises: [CancelledError]).} = ## Returns the unsigned blinded block obtained from the Builder API. ## Used by the BN's own validators, but not the REST server when SBBB is deneb_mev.SignedBlindedBeaconBlock: type EPH = deneb_mev.BlindedExecutionPayloadAndBlobsBundle elif SBBB is electra_mev.SignedBlindedBeaconBlock: type EPH = electra_mev.BlindedExecutionPayloadAndBlobsBundle else: static: doAssert false let blindedBlockParts = await getBlindedBlockParts[EPH]( node, payloadBuilderClient, head, validator_pubkey, slot, randao, validator_index, graffitiBytes) if blindedBlockParts.isErr: # Not signed yet, fine to try to fall back on EL beacon_block_builder_missed_with_fallback.inc() return err blindedBlockParts.error() # These, together, get combined into the blinded block for signing and # proposal through the relay network. let (executionPayloadHeader, bidValue, consensusValue, forkedBlck) = blindedBlockParts.get let unsignedBlindedBlock = getUnsignedBlindedBeaconBlock[SBBB]( node, slot, validator_index, forkedBlck, executionPayloadHeader) if unsignedBlindedBlock.isErr: return err unsignedBlindedBlock.error() ok(BuilderBid[SBBB]( blindedBlckPart: unsignedBlindedBlock.get, executionPayloadValue: bidValue, consensusBlockValue: consensusValue )) proc proposeBlockMEV( node: BeaconNode, payloadBuilderClient: RestClientRef, blindedBlock: deneb_mev.SignedBlindedBeaconBlock | electra_mev.SignedBlindedBeaconBlock): Future[Result[BlockRef, string]] {.async: (raises: [CancelledError]).} = let unblindedBlockRef = await node.unblindAndRouteBlockMEV( payloadBuilderClient, blindedBlock) return if unblindedBlockRef.isOk and unblindedBlockRef.get.isSome: beacon_blocks_proposed.inc() ok(unblindedBlockRef.get.get) else: # unblindedBlockRef.isOk and unblindedBlockRef.get.isNone indicates that # the block failed to validate and integrate into the DAG, which for the # purpose of this return value, is equivalent. It's used to drive Beacon # REST API output. # # https://collective.flashbots.net/t/post-mortem-april-3rd-2023-mev-boost-relay-incident-and-related-timing-issue/1540 # has caused false positives, because # "A potential mitigation to this attack is to introduce a cutoff timing # into the proposer's slot whereafter this time (e.g. 3 seconds) the relay # will no longer return a block to the proposer. Relays began to roll out # this mitigation in the evening of April 3rd UTC time with a 2 second # cutoff, and notified other relays to do the same. After receiving # credible reports of honest validators missing their slots the suggested # timing cutoff was increased to 3 seconds." let errMsg = if unblindedBlockRef.isErr: unblindedBlockRef.error else: "Unblinded block not returned to proposer" err errMsg func isEFMainnet(cfg: RuntimeConfig): bool = cfg.DEPOSIT_CHAIN_ID == 1 and cfg.DEPOSIT_NETWORK_ID == 1 proc makeBlindedBeaconBlockForHeadAndSlot*[BBB: ForkyBlindedBeaconBlock]( node: BeaconNode, payloadBuilderClient: RestClientRef, randao_reveal: ValidatorSig, validator_index: ValidatorIndex, graffiti: GraffitiBytes, head: BlockRef, slot: Slot): Future[BlindedBlockResult[BBB]] {.async: (raises: [CancelledError]).} = ## Requests a beacon node to produce a valid blinded block, which can then be ## signed by a validator. A blinded block is a block with only a transactions ## root, rather than a full transactions list. ## ## This function is used by the validator client, but not the beacon node for ## its own validators. when BBB is electra_mev.BlindedBeaconBlock: type EPH = electra_mev.BlindedExecutionPayloadAndBlobsBundle elif BBB is deneb_mev.BlindedBeaconBlock: type EPH = deneb_mev.BlindedExecutionPayloadAndBlobsBundle else: static: doAssert false let pubkey = # Relevant state for knowledge of validators withState(node.dag.headState): if node.dag.cfg.isEFMainnet and livenessFailsafeInEffect( forkyState.data.block_roots.data, forkyState.data.slot): # It's head block's slot which matters here, not proposal slot return err("Builder API liveness failsafe in effect") if distinctBase(validator_index) >= forkyState.data.validators.lenu64: debug "makeBlindedBeaconBlockForHeadAndSlot: invalid validator index", head = shortLog(head), validator_index, validators_len = forkyState.data.validators.len return err("Invalid validator index") forkyState.data.validators.item(validator_index).pubkey blindedBlockParts = await getBlindedBlockParts[EPH]( node, payloadBuilderClient, head, pubkey, slot, randao_reveal, validator_index, graffiti) if blindedBlockParts.isErr: # Don't try EL fallback -- VC specifically requested a blinded block return err("Unable to create blinded block") let (executionPayloadHeader, bidValue, consensusValue, forkedBlck) = blindedBlockParts.get withBlck(forkedBlck): when consensusFork >= ConsensusFork.Deneb: when ((consensusFork == ConsensusFork.Deneb and EPH is deneb_mev.BlindedExecutionPayloadAndBlobsBundle) or (consensusFork == ConsensusFork.Electra and EPH is electra_mev.BlindedExecutionPayloadAndBlobsBundle)): return ok( BuilderBid[BBB]( blindedBlckPart: constructPlainBlindedBlock[BBB](forkyBlck, executionPayloadHeader), executionPayloadValue: bidValue, consensusBlockValue: consensusValue)) else: return err("makeBlindedBeaconBlockForHeadAndSlot: mismatched block/payload types") else: return err("Attempt to create pre-Deneb blinded block") proc collectBids( SBBB: typedesc, EPS: typedesc, node: BeaconNode, payloadBuilderClient: RestClientRef, validator_pubkey: ValidatorPubKey, validator_index: ValidatorIndex, graffitiBytes: GraffitiBytes, head: BlockRef, slot: Slot, randao: ValidatorSig): Future[Bids[SBBB]] {.async: (raises: [CancelledError]).} = let usePayloadBuilder = if not payloadBuilderClient.isNil: withState(node.dag.headState): # Head slot, not proposal slot, matters here # TODO it might make some sense to allow use of builder API if local # EL fails -- i.e. it would change priorities, so any block from the # execution layer client would override builder API. But it seems an # odd requirement to produce no block at all in those conditions. (not node.dag.cfg.isEFMainnet) or (not livenessFailsafeInEffect( forkyState.data.block_roots.data, forkyState.data.slot)) else: false let payloadBuilderBidFut = if usePayloadBuilder: when not (EPS is bellatrix.ExecutionPayloadForSigning): getBuilderBid[SBBB](node, payloadBuilderClient, head, validator_pubkey, slot, randao, graffitiBytes, validator_index) else: let fut = newFuture[BlindedBlockResult[SBBB]]("builder-bid") fut.complete(BlindedBlockResult[SBBB].err( "Bellatrix Builder API unsupported")) fut else: let fut = newFuture[BlindedBlockResult[SBBB]]("builder-bid") fut.complete(BlindedBlockResult[SBBB].err( "either payload builder disabled or liveness failsafe active")) fut engineBlockFut = makeBeaconBlockForHeadAndSlot( EPS, node, randao, validator_index, graffitiBytes, head, slot) # getBuilderBid times out after BUILDER_PROPOSAL_DELAY_TOLERANCE, with 1 more # second for remote validators. makeBeaconBlockForHeadAndSlot times out after # 1 second. await allFutures(payloadBuilderBidFut, engineBlockFut) doAssert payloadBuilderBidFut.finished and engineBlockFut.finished let builderBid = if payloadBuilderBidFut.completed: if payloadBuilderBidFut.value().isOk: Opt.some(payloadBuilderBidFut.value().value()) elif usePayloadBuilder: notice "Payload builder error", slot, head = shortLog(head), validator = shortLog(validator_pubkey), err = payloadBuilderBidFut.value().error() Opt.none(BuilderBid[SBBB]) else: # Effectively the same case, but without the log message Opt.none(BuilderBid[SBBB]) else: notice "Payload builder bid request failed", slot, head = shortLog(head), validator = shortLog(validator_pubkey), err = payloadBuilderBidFut.error.msg Opt.none(BuilderBid[SBBB]) let engineBid = if engineBlockFut.completed: if engineBlockFut.value.isOk: Opt.some(engineBlockFut.value().value()) else: notice "Engine block building error", slot, head = shortLog(head), validator = shortLog(validator_pubkey), err = engineBlockFut.value.error() Opt.none(EngineBid) else: notice "Engine block building failed", slot, head = shortLog(head), validator = shortLog(validator_pubkey), err = engineBlockFut.error.msg Opt.none(EngineBid) Bids[SBBB]( engineBid: engineBid, builderBid: builderBid) func builderBetterBid(localBlockValueBoost: uint8, builderValue: UInt256, engineValue: Wei): bool = # Scale down to ensure no overflows; if lower few bits would have been # otherwise decisive, was close enough not to matter. Calibrate to let # uint8-range percentages avoid overflowing. const scalingBits = 10 static: doAssert 1 shl scalingBits > high(typeof(localBlockValueBoost)).uint16 + 100 let scaledBuilderValue = (builderValue shr scalingBits) * 100 scaledEngineValue = engineValue shr scalingBits scaledBuilderValue > scaledEngineValue * (localBlockValueBoost.uint16 + 100).u256 func builderBetterBid*(builderBoostFactor: uint64, builderValue: UInt256, engineValue: Wei): bool = if builderBoostFactor == 0'u64: false elif builderBoostFactor == 100'u64: builderValue >= engineValue elif builderBoostFactor == high(uint64): true else: let multiplier = builderBoostFactor.u256 multipledBuilderValue = builderValue * multiplier overflow = if builderValue == UInt256.zero: false else: builderValue != multipledBuilderValue div multiplier if overflow: # In case of overflow we will use `builderValue`. true else: (multipledBuilderValue div 100) >= engineValue func builderBetterBid(boostFactor: BoostFactor, builderValue: UInt256, engineValue: Wei): bool = case boostFactor.kind of BoostFactorKind.Local: builderBetterBid(boostFactor.value8, builderValue, engineValue) of BoostFactorKind.Builder: builderBetterBid(boostFactor.value64, builderValue, engineValue) proc proposeBlockAux( SBBB: typedesc, EPS: typedesc, node: BeaconNode, validator: AttachedValidator, validator_index: ValidatorIndex, head: BlockRef, slot: Slot, randao: ValidatorSig, fork: Fork, genesis_validators_root: Eth2Digest, localBlockValueBoost: uint8 ): Future[BlockRef] {.async: (raises: [CancelledError]).} = let boostFactor = BoostFactor.init(localBlockValueBoost) graffitiBytes = node.getGraffitiBytes(validator) payloadBuilderClient = node.getPayloadBuilderClient(validator_index.distinctBase).valueOr(nil) collectedBids = await collectBids( SBBB, EPS, node, payloadBuilderClient, validator.pubkey, validator_index, graffitiBytes, head, slot, randao) useBuilderBlock = if collectedBids.builderBid.isSome(): collectedBids.engineBid.isNone() or builderBetterBid( boostFactor, collectedBids.builderBid.value().executionPayloadValue, collectedBids.engineBid.value().executionPayloadValue) else: if not collectedBids.engineBid.isSome(): return head # errors logged in router false # There should always be an engine bid, and if payloadBuilderClient exists, # not getting a builder bid is also an error. Do not report lack of builder # when that's intentional. Replicate some of the nested if statements here, # because that avoids entangling logging with other functionality. The logs # here are inteded to clarify that, for example, when the builder API relay # URL is provided for this validator, it's reasonable for Nimbus not to use # it for every block. if collectedBids.engineBid.isSome(): # Three cases: builder bid expected and absent, builder bid expected and # present, and builder bid not expected. if collectedBids.builderBid.isSome(): info "Compared engine and builder block bids", localBlockValueBoost, useBuilderBlock, builderBlockValue = toString(collectedBids.builderBid.value().executionPayloadValue, 10), engineBlockValue = toString(collectedBids.engineBid.value().executionPayloadValue, 10) elif payloadBuilderClient.isNil: discard # builder API not configured for this block else: info "Did not receive expected builder bid; using engine block", engineBlockValue = collectedBids.engineBid.value().executionPayloadValue else: # Similar three cases: builder bid expected and absent, builder bid # expected and present, and builder bid not expected. However, only # the second is worth logging, because the other two result in this # block being missed altogether, and with details logged elsewhere. if collectedBids.builderBid.isSome: info "Did not receive expected engine bid; using builder block", builderBlockValue = collectedBids.builderBid.value().executionPayloadValue if useBuilderBlock: let blindedBlock = (await blindedBlockCheckSlashingAndSign( node, slot, validator, validator_index, collectedBids.builderBid.value().blindedBlckPart)).valueOr: return head # Before proposeBlockMEV, can fall back to EL; after, cannot without # risking slashing. maybeUnblindedBlock = await proposeBlockMEV( node, payloadBuilderClient, blindedBlock) return maybeUnblindedBlock.valueOr: warn "Blinded block proposal incomplete", head = shortLog(head), slot, validator_index, validator = shortLog(validator), err = maybeUnblindedBlock.error, blindedBlck = shortLog(blindedBlock) beacon_block_builder_missed_without_fallback.inc() return head let engineBid = collectedBids.engineBid.value() withBlck(engineBid.blck): let blockRoot = hash_tree_root(forkyBlck) signingRoot = compute_block_signing_root( fork, genesis_validators_root, slot, blockRoot) notSlashable = node.attachedValidators .slashingProtection .registerBlock(validator_index, validator.pubkey, slot, signingRoot) if notSlashable.isErr: warn "Slashing protection activated for block proposal", blockRoot = shortLog(blockRoot), blck = shortLog(forkyBlck), signingRoot = shortLog(signingRoot), validator = validator.pubkey, slot = slot, existingProposal = notSlashable.error return head let signature = block: let res = await validator.getBlockSignature( fork, genesis_validators_root, slot, blockRoot, engineBid.blck) if res.isErr(): warn "Unable to sign block", validator = shortLog(validator), error_msg = res.error() return head res.get() signedBlock = consensusFork.SignedBeaconBlock( message: forkyBlck, signature: signature, root: blockRoot) blobsOpt = when consensusFork >= ConsensusFork.Deneb: template blobsBundle: untyped = engineBid.blobsBundleOpt.get Opt.some(signedBlock.create_blob_sidecars( blobsBundle.proofs, blobsBundle.blobs)) else: Opt.none(seq[BlobSidecar]) newBlockRef = ( await node.router.routeSignedBeaconBlock(signedBlock, blobsOpt, checkValidator = false) ).valueOr: return head # Errors logged in router if newBlockRef.isNone(): return head # Validation errors logged in router notice "Block proposed", blockRoot = shortLog(blockRoot), blck = shortLog(forkyBlck), signature = shortLog(signature), validator = shortLog(validator) beacon_blocks_proposed.inc() return newBlockRef.get() proc proposeBlock( node: BeaconNode, validator: AttachedValidator, validator_index: ValidatorIndex, head: BlockRef, slot: Slot ): Future[BlockRef] {.async: (raises: [CancelledError]).} = if head.slot >= slot: # We should normally not have a head newer than the slot we're proposing for # but this can happen if block proposal is delayed warn "Skipping proposal, have newer head already", headSlot = shortLog(head.slot), headBlockRoot = shortLog(head.root), slot = shortLog(slot) return head let fork = node.dag.forkAtEpoch(slot.epoch) genesis_validators_root = node.dag.genesis_validators_root randao = block: let res = await validator.getEpochSignature( fork, genesis_validators_root, slot.epoch) if res.isErr(): warn "Unable to generate randao reveal", validator = shortLog(validator), error_msg = res.error() return head res.get() template proposeBlockContinuation(type1, type2: untyped): auto = await proposeBlockAux( type1, type2, node, validator, validator_index, head, slot, randao, fork, genesis_validators_root, node.config.localBlockValueBoost) return withConsensusFork(node.dag.cfg.consensusForkAtEpoch(slot.epoch)): when consensusFork >= ConsensusFork.Deneb: proposeBlockContinuation( consensusFork.SignedBlindedBeaconBlock, consensusFork.ExecutionPayloadForSigning) else: # Pre-Deneb MEV is not supported; this signals that, because it triggers # intentional SignedBlindedBeaconBlock/ExecutionPayload mismatches. proposeBlockContinuation( deneb_mev.SignedBlindedBeaconBlock, max(ConsensusFork.Bellatrix, consensusFork).ExecutionPayloadForSigning) proc sendAttestations(node: BeaconNode, head: BlockRef, slot: Slot) = ## Perform all attestations that the validators attached to this node should ## perform during the given slot if slot + SLOTS_PER_EPOCH < head.slot: # The latest block we know about is a lot newer than the slot we're being # asked to attest to - this makes it unlikely that it will be included # at all. # TODO the oldest attestations allowed are those that are older than the # finalized epoch.. also, it seems that posting very old attestations # is risky from a slashing perspective. More work is needed here. warn "Skipping attestation, head is too recent", head = shortLog(head), slot = shortLog(slot) return if slot < node.dag.finalizedHead.slot: # During checkpoint sync, we implicitly finalize the given slot even if the # state transition does not yet consider it final - this is a sanity check # mostly to ensure the `atSlot` below works as expected warn "Skipping attestation - slot already finalized", head = shortLog(head), slot = shortLog(slot), finalized = shortLog(node.dag.finalizedHead) return let attestationHead = head.atSlot(slot) if head != attestationHead.blck: # In rare cases, such as when we're busy syncing or just slow, we'll be # attesting to a past state - we must then recreate the world as it looked # like back then notice "Attesting to a state in the past, falling behind?", attestationHead = shortLog(attestationHead), head = shortLog(head) trace "Checking attestations", attestationHead = shortLog(attestationHead), head = shortLog(head) # We need to run attestations exactly for the slot that we're attesting to. # In case blocks went missing, this means advancing past the latest block # using empty slots as fillers. # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/validator.md#validator-assignments let epochRef = node.dag.getEpochRef( attestationHead.blck, slot.epoch, false).valueOr: warn "Cannot construct EpochRef for attestation head, report bug", attestationHead = shortLog(attestationHead), slot, error return committees_per_slot = get_committee_count_per_slot(epochRef.shufflingRef) fork = node.dag.forkAtEpoch(slot.epoch) consensusFork = node.dag.cfg.consensusForkAtEpoch(slot.epoch) genesis_validators_root = node.dag.genesis_validators_root registeredRes = node.attachedValidators.slashingProtection.withContext: var tmp: seq[(RegisteredAttestation, SubnetId)] for committee_index in get_committee_indices(committees_per_slot): let committee = get_beacon_committee( epochRef.shufflingRef, slot, committee_index) subnet_id = compute_subnet_for_attestation( committees_per_slot, slot, committee_index) for index_in_committee, validator_index in committee: let validator = node.getValidatorForDuties(validator_index, slot).valueOr: continue data = if consensusFork >= ConsensusFork.Electra: makeAttestationData(epochRef, attestationHead, CommitteeIndex(0)) else: makeAttestationData(epochRef, attestationHead, committee_index) # TODO signing_root is recomputed in produceAndSignAttestation/signAttestation just after signingRoot = compute_attestation_signing_root( fork, genesis_validators_root, data) registered = registerAttestationInContext( validator_index, validator.pubkey, data.source.epoch, data.target.epoch, signingRoot) if registered.isErr(): warn "Slashing protection activated for attestation", attestationData = shortLog(data), signingRoot = shortLog(signingRoot), validator_index, validator = shortLog(validator), badVoteDetails = $registered.error() continue tmp.add((RegisteredAttestation( validator: validator, committee_index: committee_index, index_in_committee: uint64 index_in_committee, committee_len: committee.len(), data: data), subnet_id )) tmp if registeredRes.isErr(): warn "Could not update slashing database, skipping attestation duties", error = registeredRes.error() else: for attestation in registeredRes[]: asyncSpawn createAndSendAttestation( node, fork, genesis_validators_root, attestation[0], attestation[1]) proc createAndSendSyncCommitteeMessage(node: BeaconNode, validator: AttachedValidator, slot: Slot, subcommitteeIdx: SyncSubcommitteeIndex, head: BlockRef) {.async: (raises: [CancelledError]).} = let fork = node.dag.forkAtEpoch(slot.epoch) genesis_validators_root = node.dag.genesis_validators_root msg = block: let res = await validator.getSyncCommitteeMessage( fork, genesis_validators_root, slot, head.root) if res.isErr(): warn "Unable to sign committee message", validator = shortLog(validator), slot = slot, block_root = shortLog(head.root) return res.get() # Logged in the router let res = await node.router.routeSyncCommitteeMessage( msg, subcommitteeIdx, checkSignature = false) if not res.isOk(): return if node.config.dumpEnabled: dump(node.config.dumpDirOutgoing, msg, validator.pubkey) proc sendSyncCommitteeMessages(node: BeaconNode, head: BlockRef, slot: Slot) = let syncCommittee = node.dag.syncCommitteeParticipants(slot + 1) for subcommitteeIdx in SyncSubcommitteeIndex: for valIdx in syncSubcommittee(syncCommittee, subcommitteeIdx): let validator = node.getValidatorForDuties( valIdx, slot, slashingSafe = true).valueOr: continue asyncSpawn createAndSendSyncCommitteeMessage(node, validator, slot, subcommitteeIdx, head) proc signAndSendContribution(node: BeaconNode, validator: AttachedValidator, subcommitteeIdx: SyncSubcommitteeIndex, head: BlockRef, slot: Slot) {.async: (raises: [CancelledError]).} = let fork = node.dag.forkAtEpoch(slot.epoch) genesis_validators_root = node.dag.genesis_validators_root selectionProof = block: let res = await validator.getSyncCommitteeSelectionProof( fork, genesis_validators_root, slot, subcommitteeIdx) if res.isErr(): warn "Unable to generate committee selection proof", validator = shortLog(validator), slot, subnet_id = subcommitteeIdx, error = res.error() return res.get() if not is_sync_committee_aggregator(selectionProof): return var msg = SignedContributionAndProof( message: ContributionAndProof( aggregator_index: uint64 validator.index.get, selection_proof: selectionProof)) if not node.syncCommitteeMsgPool[].produceContribution( slot, head.bid, subcommitteeIdx, msg.message.contribution): return msg.signature = block: let res = await validator.getContributionAndProofSignature( fork, genesis_validators_root, msg.message) if res.isErr(): warn "Unable to sign sync committee contribution", validator = shortLog(validator), message = shortLog(msg.message), error_msg = res.error() return res.get() # Logged in the router discard await node.router.routeSignedContributionAndProof(msg, false) proc sendSyncCommitteeContributions( node: BeaconNode, head: BlockRef, slot: Slot) = let syncCommittee = node.dag.syncCommitteeParticipants(slot + 1) for subcommitteeIdx in SyncSubcommitteeIndex: for valIdx in syncSubcommittee(syncCommittee, subcommitteeIdx): let validator = node.getValidatorForDuties( valIdx, slot, slashingSafe = true).valueOr: continue asyncSpawn signAndSendContribution( node, validator, subcommitteeIdx, head, slot) proc handleProposal(node: BeaconNode, head: BlockRef, slot: Slot): Future[BlockRef] {.async: (raises: [CancelledError]).} = ## Perform the proposal for the given slot, iff we have a validator attached ## that is supposed to do so, given the shuffling at that slot for the given ## head - to compute the proposer, we need to advance a state to the given ## slot let proposer = node.dag.getProposer(head, slot).valueOr: return head proposerKey = node.dag.validatorKey(proposer).get().toPubKey validator = node.getValidatorForDuties(proposer, slot).valueOr: debug "Expecting block proposal", headRoot = shortLog(head.root), slot = shortLog(slot), proposer_index = proposer, proposer = shortLog(proposerKey) return head return await proposeBlock(node, validator, proposer, head, slot) proc signAndSendAggregate( node: BeaconNode, validator: AttachedValidator, shufflingRef: ShufflingRef, slot: Slot, committee_index: CommitteeIndex) {.async: (raises: [CancelledError]).} = let fork = node.dag.forkAtEpoch(slot.epoch) genesis_validators_root = node.dag.genesis_validators_root validator_index = validator.index.get() selectionProof = block: let res = await validator.getSlotSignature( fork, genesis_validators_root, slot) if res.isErr(): warn "Unable to create slot signature", validator = shortLog(validator), slot, error = res.error() return res.get() # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/validator.md#aggregation-selection if not is_aggregator( shufflingRef, slot, committee_index, selectionProof): return # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/validator.md#construct-aggregate # https://github.com/ethereum/consensus-specs/blob/v1.4.0/specs/phase0/validator.md#aggregateandproof var msg = phase0.SignedAggregateAndProof( message: phase0.AggregateAndProof( aggregator_index: uint64 validator_index, selection_proof: selectionProof)) msg.message.aggregate = node.attestationPool[].getAggregatedAttestation( slot, committee_index).valueOr: return msg.signature = block: let res = await validator.getAggregateAndProofSignature( fork, genesis_validators_root, msg.message) if res.isErr(): warn "Unable to sign aggregate", validator = shortLog(validator), error_msg = res.error() return res.get() validator.doppelgangerActivity(msg.message.aggregate.data.slot.epoch) # Logged in the router discard await node.router.routeSignedAggregateAndProof( msg, checkSignature = false) proc sendAggregatedAttestations( node: BeaconNode, head: BlockRef, slot: Slot) = # Aggregated attestations must be sent by members of the beacon committees for # the given slot, for which `is_aggregator` returns `true`. let shufflingRef = node.dag.getShufflingRef(head, slot.epoch, false).valueOr: warn "Cannot construct EpochRef for head, report bug", head = shortLog(head), slot return committees_per_slot = get_committee_count_per_slot(shufflingRef) for committee_index in get_committee_indices(committees_per_slot): for _, validator_index in get_beacon_committee(shufflingRef, slot, committee_index): let validator = node.getValidatorForDuties(validator_index, slot).valueOr: continue asyncSpawn signAndSendAggregate(node, validator, shufflingRef, slot, committee_index) proc updateValidatorMetrics*(node: BeaconNode) = # Technically, this only needs to be done on epoch transitions and if there's # a reorg that spans an epoch transition, but it's easier to implement this # way for now. # We'll limit labelled metrics to the first 64, so that we don't overload # Prometheus. var total: Gwei var i = 0 for _, v in node.attachedValidators[].validators: let balance = if v.index.isNone(): 0.Gwei elif v.index.get().uint64 >= getStateField(node.dag.headState, balances).lenu64: debug "Cannot get validator balance, index out of bounds", pubkey = shortLog(v.pubkey), index = v.index.get(), balances = getStateField(node.dag.headState, balances).len, stateRoot = getStateRoot(node.dag.headState) 0.Gwei else: getStateField(node.dag.headState, balances).item(v.index.get()) if i < 64: attached_validator_balance.set( balance.toGaugeValue, labelValues = [shortLog(v.pubkey)]) inc i total += balance node.attachedValidatorBalanceTotal = total attached_validator_balance_total.set(total.toGaugeValue) from std/times import epochTime proc getValidatorRegistration( node: BeaconNode, validator: AttachedValidator, epoch: Epoch): Future[Result[SignedValidatorRegistrationV1, string]] {.async: (raises: [CancelledError]).} = let validatorIdx = validator.index.valueOr: # The validator index will be missing when the validator was not # activated for duties yet. We can safely skip the registration then. return let feeRecipient = node.getFeeRecipient(validator.pubkey, validatorIdx, epoch) let gasLimit = node.getGasLimit(validator.pubkey) var validatorRegistration = SignedValidatorRegistrationV1( message: ValidatorRegistrationV1( fee_recipient: ExecutionAddress(data: distinctBase(feeRecipient)), gas_limit: gasLimit, timestamp: epochTime().uint64, pubkey: validator.pubkey)) let signature = await validator.getBuilderSignature( node.dag.cfg.genesisFork, validatorRegistration.message) debug "getValidatorRegistration: registering", validatorRegistration if signature.isErr: return err signature.error validatorRegistration.signature = signature.get return ok validatorRegistration proc registerValidatorsPerBuilder( node: BeaconNode, payloadBuilderAddress: string, epoch: Epoch, attachedValidatorPubkeys: seq[ValidatorPubKey]) {.async: (raises: [CancelledError]).} = const HttpOk = 200 BUILDER_VALIDATOR_REGISTRATION_DELAY_TOLERANCE = 6.seconds let payloadBuilderClient = RestClientRef.new(payloadBuilderAddress).valueOr: debug "Unable to initialize payload builder client while registering validators", payloadBuilderAddress, epoch, err = error return if payloadBuilderClient.isNil: debug "registerValidatorsPerBuilder: got nil payload builder REST client reference", payloadBuilderAddress, epoch return const emptyNestedSeq = @[newSeq[SignedValidatorRegistrationV1](0)] # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/validator.md#validator-registration # Seed with single empty inner list to avoid special cases var validatorRegistrations = emptyNestedSeq # Some relay networks disallow large request bodies, so split requests template addValidatorRegistration( validatorRegistration: SignedValidatorRegistrationV1) = const registrationValidatorChunkSize = 500 if validatorRegistrations[^1].len < registrationValidatorChunkSize: validatorRegistrations[^1].add validatorRegistration else: validatorRegistrations.add @[validatorRegistration] # First, check for VC-added keys; cheaper because provided pre-signed # See issue #5599: currently VC have no way to provide BN with per-validator # builders per the specs, so we have to resort to use the BN fallback # default (--payload-builder-url value, obtained by calling # getPayloadBuilderAddress) var nonExitedVcPubkeys: HashSet[ValidatorPubKey] if node.externalBuilderRegistrations.len > 0 and payloadBuilderAddress == node.config.getPayloadBuilderAddress.value: withState(node.dag.headState): let currentEpoch = node.currentSlot().epoch for i in 0 ..< forkyState.data.validators.len: # https://github.com/ethereum/beacon-APIs/blob/v2.4.0/apis/validator/register_validator.yaml # "Note that only registrations for active or pending validators must # be sent to the builder network. Registrations for unknown or exited # validators must be filtered out and not sent to the builder # network." if forkyState.data.validators.item(i).exit_epoch > currentEpoch: let pubkey = forkyState.data.validators.item(i).pubkey node.externalBuilderRegistrations.withValue( pubkey, signedValidatorRegistration): nonExitedVcPubkeys.incl signedValidatorRegistration[].message.pubkey addValidatorRegistration signedValidatorRegistration[] for key in attachedValidatorPubkeys: # Already included from VC if key in nonExitedVcPubkeys: warn "registerValidators: same validator registered by beacon node and validator client", pubkey = shortLog(key) continue # Time passed during awaits; REST keymanager API might have removed it if key notin node.attachedValidators[].validators: continue let validator = try: node.attachedValidators[].validators[key] except KeyError: raiseAssert "just checked" if validator.index.isNone: continue # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/builder.md#is_eligible_for_registration # Validators should be active or pending withState(node.dag.headState): if distinctBase(validator.index.get) >= forkyState.data.validators.lenu64: continue if node.currentSlot().epoch >= forkyState.data.validators.item(validator.index.get).exit_epoch: continue if validator.externalBuilderRegistration.isSome: addValidatorRegistration validator.externalBuilderRegistration.get else: let validatorRegistration = await node.getValidatorRegistration(validator, epoch) if validatorRegistration.isErr: error "registerValidators: validatorRegistration failed", validatorRegistration continue # Time passed during await; REST keymanager API might have removed it if key notin node.attachedValidators[].validators: continue let validator = try: node.attachedValidators[].validators[key] except KeyError: raiseAssert "just checked" validator.externalBuilderRegistration = Opt.some validatorRegistration.get addValidatorRegistration validatorRegistration.get if validatorRegistrations == emptyNestedSeq: return # TODO if there are too many chunks, could trigger DoS protections, so # might randomize order to accumulate cumulative coverage for chunkIdx in 0 ..< validatorRegistrations.len: let registerValidatorResult = try: awaitWithTimeout( payloadBuilderClient.registerValidator( validatorRegistrations[chunkIdx]), BUILDER_VALIDATOR_REGISTRATION_DELAY_TOLERANCE): error "Timeout when registering validator with builder" continue # Try next batch regardless except RestError as exc: warn "Error when registering validator(s) with builder", err = exc.msg continue if HttpOk != registerValidatorResult.status: warn "registerValidators: Couldn't register validator with MEV builder", registerValidatorResult proc registerValidators*(node: BeaconNode, epoch: Epoch) {.async: (raises: [CancelledError]).} = if not node.config.payloadBuilderEnable: return var builderKeys: Table[string, seq[ValidatorPubKey]] # Ensure VC validators are still registered if we have no attached validators let externalPayloadBuilderAddress = node.config.getPayloadBuilderAddress if externalPayloadBuilderAddress.isSome: builderKeys[externalPayloadBuilderAddress.value] = newSeq[ValidatorPubKey](0) for pubkey in node.attachedValidators[].validators.keys: let payloadBuilderAddress = node.getPayloadBuilderAddress(pubkey).valueOr: continue builderKeys.mgetOrPut( payloadBuilderAddress, default(seq[ValidatorPubKey])).add pubkey for payloadBuilderAddress, keys in builderKeys: await node.registerValidatorsPerBuilder(payloadBuilderAddress, epoch, keys) proc updateValidators( node: BeaconNode, validators: openArray[Validator]) = # Since validator indicies are stable, we only check the "updated" range - # checking all validators would significantly slow down this loop when there # are many inactive keys for i in node.dutyValidatorCount..validators.high: let v = node.attachedValidators[].getValidator(validators[i].pubkey).valueOr: continue node.attachedValidators[].setValidatorIndex(v, ValidatorIndex(i)) node.dutyValidatorCount = validators.len for validator in node.attachedValidators[]: # Check if any validators have been activated if validator.needsUpdate and validator.index.isSome(): # Activation epoch can change after index is assigned.. let index = validator.index.get() if index < validators.lenu64: node.attachedValidators[].updateValidator( validator, Opt.some(ValidatorAndIndex( index: index, validator: validators[int index] )) ) proc handleFallbackAttestations(node: BeaconNode, lastSlot, slot: Slot) = # Neither block proposal nor sync committee duties can be done in this # situation. let attestationHead = node.lastValidAttestedBlock.valueOr: return if attestationHead.slot + SLOTS_PER_EPOCH < slot: return sendAttestations(node, attestationHead.blck, slot) proc handleValidatorDuties*(node: BeaconNode, lastSlot, slot: Slot) {.async: (raises: [CancelledError]).} = ## Perform validator duties - create blocks, vote and aggregate existing votes if node.attachedValidators[].count == 0: # Nothing to do because we have no validator attached return # The dag head might be updated by sync while we're working due to the # await calls, thus we use a local variable to keep the logic straight here var head = node.dag.head if not node.isSynced(head): info "Beacon node not in sync; skipping validator duties for now", slot, headSlot = head.slot # Rewards will be growing though, as we sync.. updateValidatorMetrics(node) return elif not head.executionValid: info "Execution client not in sync; skipping validator duties for now", slot, headSlot = head.slot handleFallbackAttestations(node, lastSlot, slot) # Rewards will be growing though, as we sync.. updateValidatorMetrics(node) return else: discard # keep going node.lastValidAttestedBlock = Opt.some head.atSlot() withState(node.dag.headState): node.updateValidators(forkyState.data.validators.asSeq()) let newHead = await handleProposal(node, head, slot) head = newHead let # The latest point in time when we'll be sending out attestations attestationCutoff = node.beaconClock.fromNow(slot.attestation_deadline()) if attestationCutoff.inFuture: debug "Waiting to send attestations", head = shortLog(head), attestationCutoff = shortLog(attestationCutoff.offset) # Wait either for the block or the attestation cutoff time to arrive if await node.consensusManager[].expectBlock(slot) .withTimeout(attestationCutoff.offset): await waitAfterBlockCutoff(node.beaconClock, slot, Opt.some(head)) # Time passed - we might need to select a new head in that case node.consensusManager[].updateHead(slot) head = node.dag.head static: doAssert attestationSlotOffset == syncCommitteeMessageSlotOffset sendAttestations(node, head, slot) sendSyncCommitteeMessages(node, head, slot) updateValidatorMetrics(node) # the important stuff is done, update the vanity numbers # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/phase0/validator.md#broadcast-aggregate # https://github.com/ethereum/consensus-specs/blob/v1.5.0-alpha.4/specs/altair/validator.md#broadcast-sync-committee-contribution # Wait 2 / 3 of the slot time to allow messages to propagate, then collect # the result in aggregates static: doAssert aggregateSlotOffset == syncContributionSlotOffset, "Timing change?" let aggregateCutoff = node.beaconClock.fromNow(slot.aggregate_deadline()) if aggregateCutoff.inFuture: debug "Waiting to send aggregate attestations", aggregateCutoff = shortLog(aggregateCutoff.offset) await sleepAsync(aggregateCutoff.offset) sendAggregatedAttestations(node, head, slot) sendSyncCommitteeContributions(node, head, slot) proc registerDuties*(node: BeaconNode, wallSlot: Slot) {.async: (raises: [CancelledError]).} = ## Register upcoming duties of attached validators with the duty tracker if node.attachedValidators[].count() == 0 or not node.isSynced(node.dag.head) or not node.dag.head.executionValid: # Nothing to do because we have no validator attached return let genesis_validators_root = node.dag.genesis_validators_root head = node.dag.head # Getting the slot signature is expensive but cached - in "normal" cases we'll # be getting the duties one slot at a time for slot in wallSlot ..< wallSlot + SUBNET_SUBSCRIPTION_LEAD_TIME_SLOTS: let shufflingRef = node.dag.getShufflingRef(head, slot.epoch, false).valueOr: warn "Cannot construct EpochRef for duties - report bug", head = shortLog(head), slot return let fork = node.dag.forkAtEpoch(slot.epoch) committees_per_slot = get_committee_count_per_slot(shufflingRef) for committee_index in get_committee_indices(committees_per_slot): let committee = get_beacon_committee(shufflingRef, slot, committee_index) for index_in_committee, validator_index in committee: let validator = node.getValidator(validator_index).valueOr: continue subnet_id = compute_subnet_for_attestation( committees_per_slot, slot, committee_index) slotSigRes = await validator.getSlotSignature( fork, genesis_validators_root, slot) if slotSigRes.isErr(): error "Unable to create slot signature", validator = shortLog(validator), error_msg = slotSigRes.error() continue let isAggregator = is_aggregator(committee.lenu64, slotSigRes.get()) node.consensusManager[].actionTracker.registerDuty( slot, subnet_id, validator_index, isAggregator) proc makeMaybeBlindedBeaconBlockForHeadAndSlotImpl[ResultType]( node: BeaconNode, consensusFork: static ConsensusFork, randao_reveal: ValidatorSig, graffiti: GraffitiBytes, head: BlockRef, slot: Slot, builderBoostFactor: uint64): Future[ResultType] {.async: (raises: [CancelledError]).} = let proposer = node.dag.getProposer(head, slot).valueOr: return ResultType.err( "Unable to get proposer for specific head and slot") proposerKey = node.dag.validatorKey(proposer).get().toPubKey() payloadBuilderClient = node.getPayloadBuilderClient(proposer.distinctBase).valueOr(nil) collectedBids = await collectBids(consensusFork.SignedBlindedBeaconBlock, consensusFork.ExecutionPayloadForSigning, node, payloadBuilderClient, proposerKey, proposer, graffiti, head, slot, randao_reveal) useBuilderBlock = if collectedBids.builderBid.isSome(): collectedBids.engineBid.isNone() or builderBetterBid( BoostFactor.init(builderBoostFactor), collectedBids.builderBid.value().executionPayloadValue, collectedBids.engineBid.value().executionPayloadValue) else: if not(collectedBids.engineBid.isSome): return ResultType.err("Engine bid is not available") false engineBid = block: if useBuilderBlock: let blindedBid = collectedBids.builderBid.value() return ResultType.ok(( blck: consensusFork.MaybeBlindedBeaconBlock( isBlinded: true, blindedData: blindedBid.blindedBlckPart.message), executionValue: Opt.some(blindedBid.executionPayloadValue), consensusValue: Opt.some(blindedBid.consensusBlockValue))) collectedBids.engineBid.value() doAssert engineBid.blck.kind == consensusFork template forkyBlck: untyped = engineBid.blck.forky(consensusFork) when consensusFork >= ConsensusFork.Deneb: let blobsBundle = engineBid.blobsBundleOpt.get() doAssert blobsBundle.commitments == forkyBlck.body.blob_kzg_commitments ResultType.ok(( blck: consensusFork.MaybeBlindedBeaconBlock( isBlinded: false, data: consensusFork.BlockContents( `block`: forkyBlck, kzg_proofs: blobsBundle.proofs, blobs: blobsBundle.blobs)), executionValue: Opt.some(engineBid.executionPayloadValue), consensusValue: Opt.some(engineBid.consensusBlockValue))) else: ResultType.ok(( blck: consensusFork.MaybeBlindedBeaconBlock( isBlinded: false, data: forkyBlck), executionValue: Opt.some(engineBid.executionPayloadValue), consensusValue: Opt.some(engineBid.consensusBlockValue))) proc makeMaybeBlindedBeaconBlockForHeadAndSlot*( node: BeaconNode, consensusFork: static ConsensusFork, randao_reveal: ValidatorSig, graffiti: GraffitiBytes, head: BlockRef, slot: Slot, builderBoostFactor: uint64): auto = type ResultType = Result[tuple[ blck: consensusFork.MaybeBlindedBeaconBlock, executionValue: Opt[UInt256], consensusValue: Opt[UInt256]], string] makeMaybeBlindedBeaconBlockForHeadAndSlotImpl[ResultType]( node, consensusFork, randao_reveal, graffiti, head, slot, builderBoostFactor)