836 lines
34 KiB
Nim
836 lines
34 KiB
Nim
# beacon_chain
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# Copyright (c) 2018-2023 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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{.push raises: [].}
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import
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stew/results,
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chronicles, chronos, metrics,
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../spec/[signatures, signatures_batch],
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../sszdump
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from std/deques import Deque, addLast, contains, initDeque, items, len, shrink
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from std/sequtils import mapIt
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from ../consensus_object_pools/consensus_manager import
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ConsensusManager, checkNextProposer, optimisticExecutionPayloadHash,
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runProposalForkchoiceUpdated, shouldSyncOptimistically, updateHead,
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updateHeadWithExecution
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from ../consensus_object_pools/blockchain_dag import
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getBlockRef, getProposer, forkAtEpoch, loadExecutionBlockHash,
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markBlockVerified, validatorKey
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from ../beacon_clock import GetBeaconTimeFn, toFloatSeconds
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from ../consensus_object_pools/block_dag import BlockRef, root, shortLog, slot
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from ../consensus_object_pools/block_pools_types import
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EpochRef, VerifierError
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from ../consensus_object_pools/block_quarantine import
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addBlobless, addOrphan, addUnviable, pop, removeOrphan
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from ../consensus_object_pools/blob_quarantine import
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BlobQuarantine, hasBlobs, popBlobs
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from ../validators/validator_monitor import
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MsgSource, ValidatorMonitor, registerAttestationInBlock, registerBeaconBlock,
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registerSyncAggregateInBlock
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from ../beacon_chain_db import putBlobSidecar
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from ../spec/state_transition_block import validate_blobs
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export sszdump, signatures_batch
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logScope: topics = "gossip_blocks"
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# Block Processor
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# ------------------------------------------------------------------------------
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# The block processor moves blocks from "Incoming" to "Consensus verified"
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declareHistogram beacon_store_block_duration_seconds,
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"storeBlock() duration", buckets = [0.25, 0.5, 1, 2, 4, 8, Inf]
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const
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SLOTS_PER_PAYLOAD = SLOTS_PER_HISTORICAL_ROOT
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## Number of slots we process between each execution payload execution, while
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## syncing the finalized part of the chain
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PAYLOAD_PRE_WALL_SLOTS = SLOTS_PER_EPOCH * 2
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## Number of slots from wall time that we start processing every payload
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type
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BlobSidecars* = seq[ref BlobSidecar]
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BlockEntry = object
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blck*: ForkedSignedBeaconBlock
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blobs*: Opt[BlobSidecars]
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maybeFinalized*: bool
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## The block source claims the block has been finalized already
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resfut*: Future[Result[void, VerifierError]]
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queueTick*: Moment # Moment when block was enqueued
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validationDur*: Duration # Time it took to perform gossip validation
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src*: MsgSource
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BlockProcessor* = object
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## This manages the processing of blocks from different sources
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## Blocks and attestations are enqueued in a gossip-validated state
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##
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## from:
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## - Gossip (when synced)
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## - SyncManager (during sync)
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## - RequestManager (missing ancestor blocks)
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##
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## are then consensus-verified and added to:
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## - the blockchain DAG
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## - database
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## - attestation pool
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## - fork choice
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##
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## The processor will also reinsert blocks from the quarantine, should a
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## parent be found.
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# Config
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# ----------------------------------------------------------------
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dumpEnabled: bool
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dumpDirInvalid: string
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dumpDirIncoming: string
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# Producers
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# ----------------------------------------------------------------
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blockQueue: AsyncQueue[BlockEntry]
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# Consumer
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# ----------------------------------------------------------------
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consensusManager: ref ConsensusManager
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## Blockchain DAG, AttestationPool and Quarantine
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## Blockchain DAG, AttestationPool, Quarantine, and ELManager
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validatorMonitor: ref ValidatorMonitor
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getBeaconTime: GetBeaconTimeFn
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blobQuarantine: ref BlobQuarantine
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verifier: BatchVerifier
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lastPayload: Slot
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## The slot at which we sent a payload to the execution client the last
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## time
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NewPayloadStatus {.pure.} = enum
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valid
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notValid
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invalid
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noResponse
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ProcessingStatus {.pure.} = enum
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completed
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notCompleted
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# Initialization
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# ------------------------------------------------------------------------------
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proc new*(T: type BlockProcessor,
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dumpEnabled: bool,
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dumpDirInvalid, dumpDirIncoming: string,
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rng: ref HmacDrbgContext, taskpool: TaskPoolPtr,
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consensusManager: ref ConsensusManager,
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validatorMonitor: ref ValidatorMonitor,
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blobQuarantine: ref BlobQuarantine,
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getBeaconTime: GetBeaconTimeFn): ref BlockProcessor =
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(ref BlockProcessor)(
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dumpEnabled: dumpEnabled,
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dumpDirInvalid: dumpDirInvalid,
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dumpDirIncoming: dumpDirIncoming,
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blockQueue: newAsyncQueue[BlockEntry](),
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consensusManager: consensusManager,
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validatorMonitor: validatorMonitor,
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blobQuarantine: blobQuarantine,
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getBeaconTime: getBeaconTime,
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verifier: BatchVerifier.init(rng, taskpool)
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)
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# Sync callbacks
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# ------------------------------------------------------------------------------
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func hasBlocks*(self: BlockProcessor): bool =
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self.blockQueue.len() > 0
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# Storage
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# ------------------------------------------------------------------------------
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proc dumpInvalidBlock*(
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self: BlockProcessor, signedBlock: ForkySignedBeaconBlock) =
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if self.dumpEnabled:
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dump(self.dumpDirInvalid, signedBlock)
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proc dumpBlock[T](
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self: BlockProcessor,
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signedBlock: ForkySignedBeaconBlock,
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res: Result[T, VerifierError]) =
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if self.dumpEnabled and res.isErr:
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case res.error
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of VerifierError.Invalid:
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self.dumpInvalidBlock(signedBlock)
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of VerifierError.MissingParent:
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dump(self.dumpDirIncoming, signedBlock)
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else:
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discard
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from ../consensus_object_pools/block_clearance import
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addBackfillBlock, addHeadBlockWithParent, checkHeadBlock
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proc storeBackfillBlock(
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self: var BlockProcessor,
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signedBlock: ForkySignedBeaconBlock,
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blobsOpt: Opt[BlobSidecars]): Result[void, VerifierError] =
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# The block is certainly not missing any more
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self.consensusManager.quarantine[].missing.del(signedBlock.root)
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# Establish blob viability before calling addbackfillBlock to avoid
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# writing the block in case of blob error.
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var blobsOk = true
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when typeof(signedBlock).kind >= ConsensusFork.Deneb:
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if blobsOpt.isSome:
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let blobs = blobsOpt.get()
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let kzgCommits = signedBlock.message.body.blob_kzg_commitments.asSeq
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if blobs.len > 0 or kzgCommits.len > 0:
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let r = validate_blobs(kzgCommits, blobs.mapIt(it.blob),
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blobs.mapIt(it.kzg_proof))
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if r.isErr():
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debug "backfill blob validation failed",
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blockRoot = shortLog(signedBlock.root),
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blobs = shortLog(blobs),
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blck = shortLog(signedBlock.message),
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signature = shortLog(signedBlock.signature),
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msg = r.error()
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blobsOk = r.isOk()
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if not blobsOk:
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return err(VerifierError.Invalid)
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let res = self.consensusManager.dag.addBackfillBlock(signedBlock)
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if res.isErr():
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case res.error
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of VerifierError.MissingParent:
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if signedBlock.message.parent_root in
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self.consensusManager.quarantine[].unviable:
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# DAG doesn't know about unviable ancestor blocks - we do! Translate
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# this to the appropriate error so that sync etc doesn't retry the block
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self.consensusManager.quarantine[].addUnviable(signedBlock.root)
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return err(VerifierError.UnviableFork)
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of VerifierError.UnviableFork:
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# Track unviables so that descendants can be discarded properly
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self.consensusManager.quarantine[].addUnviable(signedBlock.root)
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else: discard
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return res
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# Only store blobs after successfully establishing block viability.
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let blobs = blobsOpt.valueOr: BlobSidecars @[]
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for b in blobs:
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self.consensusManager.dag.db.putBlobSidecar(b[])
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res
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from web3/engine_api_types import
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PayloadAttributesV1, PayloadAttributesV2, PayloadAttributesV3,
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PayloadExecutionStatus, PayloadStatusV1
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from ../el/el_manager import
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ELManager, forkchoiceUpdated, hasConnection, hasProperlyConfiguredConnection,
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sendNewPayload
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proc expectValidForkchoiceUpdated(
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elManager: ELManager, headBlockPayloadAttributesType: typedesc,
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headBlockHash, safeBlockHash, finalizedBlockHash: Eth2Digest,
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receivedBlock: ForkySignedBeaconBlock): Future[void] {.async.} =
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let
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(payloadExecutionStatus, _) = await elManager.forkchoiceUpdated(
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headBlockHash = headBlockHash,
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safeBlockHash = safeBlockHash,
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finalizedBlockHash = finalizedBlockHash,
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payloadAttributes = none headBlockPayloadAttributesType)
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receivedExecutionBlockHash =
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when typeof(receivedBlock).kind >= ConsensusFork.Bellatrix:
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receivedBlock.message.body.execution_payload.block_hash
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else:
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# https://github.com/nim-lang/Nim/issues/19802
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(static(default(Eth2Digest)))
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# Only called when expecting this to be valid because `newPayload` or some
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# previous `forkchoiceUpdated` had already marked it as valid. However, if
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# it's not the block that was received, don't info/warn either way given a
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# relative lack of immediate evidence.
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if receivedExecutionBlockHash != headBlockHash:
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return
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case payloadExecutionStatus
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of PayloadExecutionStatus.valid:
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# situation nominal
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discard
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of PayloadExecutionStatus.accepted, PayloadExecutionStatus.syncing:
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info "execution payload forkChoiceUpdated status ACCEPTED/SYNCING, but was previously VALID",
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payloadExecutionStatus = $payloadExecutionStatus, headBlockHash,
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safeBlockHash, finalizedBlockHash,
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receivedBlock = shortLog(receivedBlock)
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of PayloadExecutionStatus.invalid, PayloadExecutionStatus.invalid_block_hash:
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warn "execution payload forkChoiceUpdated status INVALID, but was previously VALID",
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payloadExecutionStatus = $payloadExecutionStatus, headBlockHash,
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safeBlockHash, finalizedBlockHash,
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receivedBlock = shortLog(receivedBlock)
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from ../consensus_object_pools/attestation_pool import
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addForkChoice, selectOptimisticHead, BeaconHead
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from ../consensus_object_pools/spec_cache import get_attesting_indices
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from ../spec/datatypes/phase0 import TrustedSignedBeaconBlock
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from ../spec/datatypes/altair import SignedBeaconBlock
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from ../spec/datatypes/bellatrix import ExecutionPayload, SignedBeaconBlock
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from ../spec/datatypes/capella import
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ExecutionPayload, SignedBeaconBlock, asTrusted, shortLog
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# TODO investigate why this seems to allow compilation even though it doesn't
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# directly address deneb.ExecutionPayload when complaint was that it didn't
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# know about "deneb"
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from ../spec/datatypes/deneb import SignedBeaconBlock, asTrusted, shortLog
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proc newExecutionPayload*(
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elManager: ELManager, blck: SomeForkyBeaconBlock):
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Future[Opt[PayloadExecutionStatus]] {.async.} =
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template executionPayload: untyped = blck.body.execution_payload
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if not elManager.hasProperlyConfiguredConnection:
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if elManager.hasConnection:
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info "No execution client connected; cannot process block payloads",
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executionPayload = shortLog(executionPayload)
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else:
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debug "No execution client connected; cannot process block payloads",
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executionPayload = shortLog(executionPayload)
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return Opt.none PayloadExecutionStatus
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debug "newPayload: inserting block into execution engine",
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executionPayload = shortLog(executionPayload)
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try:
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let payloadStatus = await elManager.sendNewPayload(blck)
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debug "newPayload: succeeded",
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parentHash = executionPayload.parent_hash,
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blockHash = executionPayload.block_hash,
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blockNumber = executionPayload.block_number,
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payloadStatus = $payloadStatus
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return Opt.some payloadStatus
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except CatchableError as err:
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warn "newPayload failed - check execution client",
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msg = err.msg,
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parentHash = shortLog(executionPayload.parent_hash),
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blockHash = shortLog(executionPayload.block_hash),
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blockNumber = executionPayload.block_number
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return Opt.none PayloadExecutionStatus
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proc getExecutionValidity(
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elManager: ELManager,
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blck: bellatrix.SignedBeaconBlock | capella.SignedBeaconBlock |
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deneb.SignedBeaconBlock):
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Future[NewPayloadStatus] {.async.} =
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if not blck.message.is_execution_block:
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return NewPayloadStatus.valid # vacuously
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try:
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let executionPayloadStatus = await elManager.newExecutionPayload(
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blck.message)
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if executionPayloadStatus.isNone:
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return NewPayloadStatus.noResponse
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case executionPayloadStatus.get
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of PayloadExecutionStatus.invalid, PayloadExecutionStatus.invalid_block_hash:
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# Blocks come either from gossip or request manager requests. In the
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# former case, they've passed libp2p gosisp validation which implies
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# correct signature for correct proposer,which makes spam expensive,
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# while for the latter, spam is limited by the request manager.
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info "execution payload invalid from EL client newPayload",
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executionPayloadStatus = $executionPayloadStatus.get,
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executionPayload = shortLog(blck.message.body.execution_payload),
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blck = shortLog(blck)
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return NewPayloadStatus.invalid
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of PayloadExecutionStatus.syncing, PayloadExecutionStatus.accepted:
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return NewPayloadStatus.notValid
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of PayloadExecutionStatus.valid:
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return NewPayloadStatus.valid
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except CatchableError as err:
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error "newPayload failed and leaked exception",
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err = err.msg,
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executionPayload = shortLog(blck.message.body.execution_payload),
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blck = shortLog(blck)
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return NewPayloadStatus.noResponse
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proc checkBloblessSignature(self: BlockProcessor,
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signed_beacon_block: deneb.SignedBeaconBlock):
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Result[void, cstring] =
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let dag = self.consensusManager.dag
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let parent = dag.getBlockRef(signed_beacon_block.message.parent_root).valueOr:
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return err("checkBloblessSignature called with orphan block")
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let proposer = getProposer(
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dag, parent, signed_beacon_block.message.slot).valueOr:
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return err("checkBloblessSignature: Cannot compute proposer")
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if uint64(proposer) != signed_beacon_block.message.proposer_index:
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return err("checkBloblessSignature: Incorrect proposer")
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if not verify_block_signature(
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dag.forkAtEpoch(signed_beacon_block.message.slot.epoch),
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getStateField(dag.headState, genesis_validators_root),
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signed_beacon_block.message.slot,
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signed_beacon_block.root,
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dag.validatorKey(proposer).get(),
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signed_beacon_block.signature):
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return err("checkBloblessSignature: Invalid proposer signature")
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ok()
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proc enqueueBlock*(
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self: var BlockProcessor, src: MsgSource, blck: ForkedSignedBeaconBlock,
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blobs: Opt[BlobSidecars],
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resfut: Future[Result[void, VerifierError]] = nil,
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maybeFinalized = false,
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validationDur = Duration()) =
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withBlck(blck):
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if forkyBlck.message.slot <= self.consensusManager.dag.finalizedHead.slot:
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# let backfill blocks skip the queue - these are always "fast" to process
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# because there are no state rewinds to deal with
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let res = self.storeBackfillBlock(forkyBlck, blobs)
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resfut.complete(res)
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return
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try:
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self.blockQueue.addLastNoWait(BlockEntry(
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blck: blck,
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blobs: blobs,
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maybeFinalized: maybeFinalized,
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resfut: resfut, queueTick: Moment.now(),
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validationDur: validationDur,
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src: src))
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except AsyncQueueFullError:
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raiseAssert "unbounded queue"
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proc storeBlock(
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self: ref BlockProcessor, src: MsgSource, wallTime: BeaconTime,
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signedBlock: ForkySignedBeaconBlock,
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blobsOpt: Opt[BlobSidecars],
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maybeFinalized = false,
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queueTick: Moment = Moment.now(), validationDur = Duration()):
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Future[Result[BlockRef, (VerifierError, ProcessingStatus)]] {.async.} =
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## storeBlock is the main entry point for unvalidated blocks - all untrusted
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## blocks, regardless of origin, pass through here. When storing a block,
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## we will add it to the dag and pass it to all block consumers that need
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## to know about it, such as the fork choice and the monitoring
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let
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attestationPool = self.consensusManager.attestationPool
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startTick = Moment.now()
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vm = self.validatorMonitor
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dag = self.consensusManager.dag
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wallSlot = wallTime.slotOrZero
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# If the block is missing its parent, it will be re-orphaned below
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self.consensusManager.quarantine[].removeOrphan(signedBlock)
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# The block is certainly not missing any more
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self.consensusManager.quarantine[].missing.del(signedBlock.root)
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if signedBlock.message.parent_root in
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self.consensusManager.quarantine[].unviable:
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# DAG doesn't know about unviable ancestor blocks - we do however!
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self.consensusManager.quarantine[].addUnviable(signedBlock.root)
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return err((VerifierError.UnviableFork, ProcessingStatus.completed))
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template handleVerifierError(errorParam: VerifierError): auto =
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let error = errorParam
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case error
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of VerifierError.MissingParent:
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if (let r = self.consensusManager.quarantine[].addOrphan(
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dag.finalizedHead.slot, ForkedSignedBeaconBlock.init(signedBlock));
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r.isErr()):
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debug "could not add orphan",
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blockRoot = shortLog(signedBlock.root),
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blck = shortLog(signedBlock.message),
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signature = shortLog(signedBlock.signature),
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err = r.error()
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else:
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debug "Block quarantined",
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blockRoot = shortLog(signedBlock.root),
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blck = shortLog(signedBlock.message),
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signature = shortLog(signedBlock.signature)
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of VerifierError.UnviableFork:
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# Track unviables so that descendants can be discarded promptly
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self.consensusManager.quarantine[].addUnviable(signedBlock.root)
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else:
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discard
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err((error, ProcessingStatus.completed))
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let
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# We have to be careful that there exists only one in-flight entry point
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# for adding blocks or the checks performed in `checkHeadBlock` might
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# be invalidated (ie a block could be added while we wait for EL response
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# here)
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parent = dag.checkHeadBlock(signedBlock)
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if parent.isErr():
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return handleVerifierError(parent.error())
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let
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payloadStatus =
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if maybeFinalized and
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(self.lastPayload + SLOTS_PER_PAYLOAD) > signedBlock.message.slot and
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(signedBlock.message.slot + PAYLOAD_PRE_WALL_SLOTS) < wallSlot and
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signedBlock.message.is_execution_block:
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# Skip payload validation when message source (reasonably) claims block
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# has been finalized - this speeds up forward sync - in the worst case
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# that the claim is false, we will correct every time we process a block
|
|
# from an honest source (or when we're close to head).
|
|
# Occasionally we also send a payload to the the EL so that it can
|
|
# progress in its own sync.
|
|
NewPayloadStatus.noResponse
|
|
else:
|
|
when typeof(signedBlock).kind >= ConsensusFork.Bellatrix:
|
|
await self.consensusManager.elManager.getExecutionValidity(signedBlock)
|
|
else:
|
|
NewPayloadStatus.valid # vacuously
|
|
payloadValid = payloadStatus == NewPayloadStatus.valid
|
|
|
|
if NewPayloadStatus.invalid == payloadStatus:
|
|
self.consensusManager.quarantine[].addUnviable(signedBlock.root)
|
|
return err((VerifierError.UnviableFork, ProcessingStatus.completed))
|
|
|
|
if NewPayloadStatus.noResponse == payloadStatus:
|
|
# When the execution layer is not available to verify the payload, we do the
|
|
# required check on the CL side instead and proceed as if the EL was syncing
|
|
|
|
# TODO run https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/deneb/beacon-chain.md#blob-kzg-commitments
|
|
# https://github.com/ethereum/execution-apis/blob/main/src/engine/experimental/blob-extension.md#specification
|
|
# "This validation MUST be instantly run in all cases even during active sync process."
|
|
#
|
|
# Client software MUST validate `blockHash` value as being equivalent to
|
|
# `Keccak256(RLP(ExecutionBlockHeader))`
|
|
# https://github.com/ethereum/execution-apis/blob/v1.0.0-beta.3/src/engine/paris.md#specification
|
|
when typeof(signedBlock).kind >= ConsensusFork.Bellatrix:
|
|
template payload(): auto = signedBlock.message.body.execution_payload
|
|
if signedBlock.message.is_execution_block and
|
|
payload.block_hash !=
|
|
signedBlock.message.compute_execution_block_hash():
|
|
debug "Execution block hash validation failed",
|
|
execution_payload = shortLog(payload)
|
|
self[].dumpInvalidBlock(signedBlock)
|
|
doAssert strictVerification notin dag.updateFlags
|
|
self.consensusManager.quarantine[].addUnviable(signedBlock.root)
|
|
return err((VerifierError.Invalid, ProcessingStatus.completed))
|
|
else:
|
|
discard
|
|
|
|
let newPayloadTick = Moment.now()
|
|
|
|
# TODO with v1.4.0, not sure this is still relevant
|
|
# Establish blob viability before calling addHeadBlock to avoid
|
|
# writing the block in case of blob error.
|
|
when typeof(signedBlock).kind >= ConsensusFork.Deneb:
|
|
if blobsOpt.isSome:
|
|
let blobs = blobsOpt.get()
|
|
let kzgCommits = signedBlock.message.body.blob_kzg_commitments.asSeq
|
|
if blobs.len > 0 or kzgCommits.len > 0:
|
|
let r = validate_blobs(kzgCommits, blobs.mapIt(it.blob),
|
|
blobs.mapIt(it.kzg_proof))
|
|
if r.isErr():
|
|
debug "blob validation failed",
|
|
blockRoot = shortLog(signedBlock.root),
|
|
blobs = shortLog(blobs),
|
|
blck = shortLog(signedBlock.message),
|
|
signature = shortLog(signedBlock.signature),
|
|
msg = r.error()
|
|
return err((VerifierError.Invalid, ProcessingStatus.completed))
|
|
|
|
type Trusted = typeof signedBlock.asTrusted()
|
|
|
|
let
|
|
blck = dag.addHeadBlockWithParent(
|
|
self.verifier, signedBlock, parent.value(), payloadValid) do (
|
|
blckRef: BlockRef, trustedBlock: Trusted,
|
|
epochRef: EpochRef, unrealized: FinalityCheckpoints):
|
|
# Callback add to fork choice if valid
|
|
attestationPool[].addForkChoice(
|
|
epochRef, blckRef, unrealized, trustedBlock.message, wallTime)
|
|
|
|
vm[].registerBeaconBlock(
|
|
src, wallTime, trustedBlock.message)
|
|
|
|
for attestation in trustedBlock.message.body.attestations:
|
|
for validator_index in dag.get_attesting_indices(attestation):
|
|
vm[].registerAttestationInBlock(attestation.data, validator_index,
|
|
trustedBlock.message.slot)
|
|
|
|
withState(dag[].clearanceState):
|
|
when consensusFork >= ConsensusFork.Altair and
|
|
Trusted isnot phase0.TrustedSignedBeaconBlock: # altair+
|
|
for i in trustedBlock.message.body.sync_aggregate.sync_committee_bits.oneIndices():
|
|
vm[].registerSyncAggregateInBlock(
|
|
trustedBlock.message.slot, trustedBlock.root,
|
|
forkyState.data.current_sync_committee.pubkeys.data[i])
|
|
|
|
self[].dumpBlock(signedBlock, blck)
|
|
|
|
# There can be a scenario where we receive a block we already received.
|
|
# However this block was before the last finalized epoch and so its parent
|
|
# was pruned from the ForkChoice.
|
|
if blck.isErr():
|
|
return handleVerifierError(blck.error())
|
|
|
|
# Even if the EL is not responding, we'll only try once every now and then
|
|
# to give it a block - this avoids a pathological slowdown where a busy EL
|
|
# times out on every block we give it because it's busy with the previous
|
|
# one
|
|
self[].lastPayload = signedBlock.message.slot
|
|
|
|
# write blobs now that block has been written.
|
|
let blobs = blobsOpt.valueOr: BlobSidecars @[]
|
|
for b in blobs:
|
|
self.consensusManager.dag.db.putBlobSidecar(b[])
|
|
|
|
let addHeadBlockTick = Moment.now()
|
|
|
|
# Eagerly update head: the incoming block "should" get selected.
|
|
#
|
|
# storeBlock gets called from validator_duties, which depends on its not
|
|
# blocking progress any longer than necessary, and processBlock here, in
|
|
# which case it's fine to await for a while on engine API results.
|
|
#
|
|
# Three general scenarios: (1) pre-merge; (2) merge, already `VALID` by way
|
|
# of `newPayload`; (3) optimistically imported, need to call fcU before DAG
|
|
# updateHead. Because in a non-finalizing network, completing sync isn't as
|
|
# useful because regular reorgs likely still occur, and when finalizing the
|
|
# EL is only called every SLOTS_PER_PAYLOAD slots regardless, await, rather
|
|
# than asyncSpawn forkchoiceUpdated calls.
|
|
#
|
|
# This reduces in-flight fcU spam, which both reduces EL load and decreases
|
|
# otherwise somewhat unpredictable CL head movement.
|
|
|
|
# Grab the new head according to our latest attestation data; determines how
|
|
# async this needs to be.
|
|
let newHead = attestationPool[].selectOptimisticHead(
|
|
wallSlot.start_beacon_time)
|
|
|
|
if newHead.isOk:
|
|
template elManager(): auto = self.consensusManager.elManager
|
|
if self.consensusManager[].shouldSyncOptimistically(wallSlot):
|
|
# Optimistic head is far in the future; report it as head block to EL.
|
|
|
|
# Note that the specification allows an EL client to skip fcU processing
|
|
# if an update to an ancestor is requested.
|
|
# > Client software MAY skip an update of the forkchoice state and MUST
|
|
# NOT begin a payload build process if `forkchoiceState.headBlockHash`
|
|
# references an ancestor of the head of canonical chain.
|
|
# https://github.com/ethereum/execution-apis/blob/v1.0.0-beta.3/src/engine/paris.md#specification-1
|
|
#
|
|
# However, in practice, an EL client may not have completed importing all
|
|
# block headers, so may be unaware of a block's ancestor status.
|
|
# Therefore, hopping back and forth between the optimistic head and the
|
|
# chain DAG head does not work well in practice, e.g., Geth:
|
|
# - "Beacon chain gapped" from DAG head to optimistic head,
|
|
# - followed by "Beacon chain reorged" from optimistic head back to DAG.
|
|
self.consensusManager[].updateHead(newHead.get.blck)
|
|
|
|
template callForkchoiceUpdated(attributes: untyped) =
|
|
if NewPayloadStatus.noResponse != payloadStatus and
|
|
not self.consensusManager[].optimisticExecutionPayloadHash.isZero:
|
|
discard await elManager.forkchoiceUpdated(
|
|
headBlockHash =
|
|
self.consensusManager[].optimisticExecutionPayloadHash,
|
|
safeBlockHash = newHead.get.safeExecutionPayloadHash,
|
|
finalizedBlockHash = newHead.get.finalizedExecutionPayloadHash,
|
|
payloadAttributes = none attributes)
|
|
|
|
case self.consensusManager.dag.cfg.consensusForkAtEpoch(
|
|
newHead.get.blck.bid.slot.epoch)
|
|
of ConsensusFork.Deneb:
|
|
callForkchoiceUpdated(PayloadAttributesV3)
|
|
of ConsensusFork.Capella:
|
|
# https://github.com/ethereum/execution-apis/blob/v1.0.0-beta.3/src/engine/shanghai.md#specification-1
|
|
# Consensus layer client MUST call this method instead of
|
|
# `engine_forkchoiceUpdatedV1` under any of the following conditions:
|
|
# `headBlockHash` references a block which `timestamp` is greater or
|
|
# equal to the Shanghai timestamp
|
|
callForkchoiceUpdated(PayloadAttributesV2)
|
|
of ConsensusFork.Bellatrix:
|
|
callForkchoiceUpdated(PayloadAttributesV1)
|
|
of ConsensusFork.Phase0, ConsensusFork.Altair:
|
|
discard
|
|
else:
|
|
let
|
|
headExecutionPayloadHash =
|
|
dag.loadExecutionBlockHash(newHead.get.blck)
|
|
wallSlot = self.getBeaconTime().slotOrZero
|
|
if headExecutionPayloadHash.isZero or
|
|
NewPayloadStatus.noResponse == payloadStatus:
|
|
# Blocks without execution payloads can't be optimistic, and don't try
|
|
# to fcU to a block the EL hasn't seen
|
|
self.consensusManager[].updateHead(newHead.get.blck)
|
|
elif newHead.get.blck.executionValid:
|
|
# `forkchoiceUpdated` necessary for EL client only.
|
|
self.consensusManager[].updateHead(newHead.get.blck)
|
|
|
|
template callExpectValidFCU(payloadAttributeType: untyped): auto =
|
|
await elManager.expectValidForkchoiceUpdated(
|
|
headBlockPayloadAttributesType = payloadAttributeType,
|
|
headBlockHash = headExecutionPayloadHash,
|
|
safeBlockHash = newHead.get.safeExecutionPayloadHash,
|
|
finalizedBlockHash = newHead.get.finalizedExecutionPayloadHash,
|
|
receivedBlock = signedBlock)
|
|
|
|
template callForkChoiceUpdated: auto =
|
|
case self.consensusManager.dag.cfg.consensusForkAtEpoch(
|
|
newHead.get.blck.bid.slot.epoch)
|
|
of ConsensusFork.Deneb:
|
|
callExpectValidFCU(payloadAttributeType = PayloadAttributesV3)
|
|
of ConsensusFork.Capella:
|
|
callExpectValidFCU(payloadAttributeType = PayloadAttributesV2)
|
|
of ConsensusFork.Phase0, ConsensusFork.Altair,
|
|
ConsensusFork.Bellatrix:
|
|
callExpectValidFCU(payloadAttributeType = PayloadAttributesV1)
|
|
|
|
if self.consensusManager.checkNextProposer(wallSlot).isNone:
|
|
# No attached validator is next proposer, so use non-proposal fcU
|
|
callForkChoiceUpdated()
|
|
else:
|
|
# Some attached validator is next proposer, so prepare payload. As
|
|
# updateHead() updated the DAG head, runProposalForkchoiceUpdated,
|
|
# which needs the state corresponding to that head block, can run.
|
|
if (await self.consensusManager.runProposalForkchoiceUpdated(
|
|
wallSlot)).isNone:
|
|
callForkChoiceUpdated()
|
|
else:
|
|
await self.consensusManager.updateHeadWithExecution(
|
|
newHead.get, self.getBeaconTime)
|
|
else:
|
|
warn "Head selection failed, using previous head",
|
|
head = shortLog(dag.head), wallSlot
|
|
|
|
let
|
|
updateHeadTick = Moment.now()
|
|
queueDur = startTick - queueTick
|
|
newPayloadDur = newPayloadTick - startTick
|
|
addHeadBlockDur = addHeadBlockTick - newPayloadTick
|
|
updateHeadDur = updateHeadTick - addHeadBlockTick
|
|
|
|
# "store block" is the full time it takes to process the block - in the log
|
|
# we split this into execution and consensus timings
|
|
storeBlockDur = newPayloadDur + addHeadBlockDur
|
|
|
|
beacon_store_block_duration_seconds.observe(storeBlockDur.toFloatSeconds())
|
|
|
|
debug "Block processed",
|
|
head = shortLog(dag.head),
|
|
blck = shortLog(blck.get()),
|
|
validationDur, queueDur, newPayloadDur, addHeadBlockDur, updateHeadDur
|
|
|
|
for quarantined in self.consensusManager.quarantine[].pop(blck.get().root):
|
|
# Process the blocks that had the newly accepted block as parent
|
|
debug "Block from quarantine",
|
|
blockRoot = shortLog(signedBlock.root),
|
|
quarantined = shortLog(quarantined.root)
|
|
|
|
withBlck(quarantined):
|
|
when typeof(forkyBlck).kind < ConsensusFork.Deneb:
|
|
self[].enqueueBlock(
|
|
MsgSource.gossip, quarantined, Opt.none(BlobSidecars))
|
|
else:
|
|
if len(forkyBlck.message.body.blob_kzg_commitments) == 0:
|
|
self[].enqueueBlock(
|
|
MsgSource.gossip, quarantined, Opt.some(BlobSidecars @[]))
|
|
else:
|
|
if (let res = checkBloblessSignature(self[], forkyBlck); res.isErr):
|
|
warn "Failed to verify signature of unorphaned blobless block",
|
|
blck = shortLog(forkyBlck),
|
|
error = res.error()
|
|
continue
|
|
if self.blobQuarantine[].hasBlobs(forkyBlck):
|
|
let blobs = self.blobQuarantine[].popBlobs(forkyBlck.root)
|
|
self[].enqueueBlock(MsgSource.gossip, quarantined, Opt.some(blobs))
|
|
else:
|
|
if not self.consensusManager.quarantine[].addBlobless(
|
|
dag.finalizedHead.slot, forkyBlck):
|
|
notice "Block quarantine full (blobless)",
|
|
blockRoot = shortLog(quarantined.root),
|
|
signature = shortLog(quarantined.signature)
|
|
|
|
ok blck.value()
|
|
|
|
# Enqueue
|
|
# ------------------------------------------------------------------------------
|
|
|
|
proc addBlock*(
|
|
self: var BlockProcessor, src: MsgSource, blck: ForkedSignedBeaconBlock,
|
|
blobs: Opt[BlobSidecars], maybeFinalized = false,
|
|
validationDur = Duration()): Future[Result[void, VerifierError]] =
|
|
## Enqueue a Gossip-validated block for consensus verification
|
|
# Backpressure:
|
|
# There is no backpressure here - producers must wait for `resfut` to
|
|
# constrain their own processing
|
|
# Producers:
|
|
# - Gossip (when synced)
|
|
# - SyncManager (during sync)
|
|
# - RequestManager (missing ancestor blocks)
|
|
# - API
|
|
let resfut = newFuture[Result[void, VerifierError]]("BlockProcessor.addBlock")
|
|
enqueueBlock(self, src, blck, blobs, resfut, maybeFinalized, validationDur)
|
|
resfut
|
|
|
|
# Event Loop
|
|
# ------------------------------------------------------------------------------
|
|
|
|
proc processBlock(
|
|
self: ref BlockProcessor, entry: BlockEntry) {.async.} =
|
|
logScope:
|
|
blockRoot = shortLog(entry.blck.root)
|
|
|
|
let
|
|
wallTime = self.getBeaconTime()
|
|
(afterGenesis, wallSlot) = wallTime.toSlot()
|
|
|
|
if not afterGenesis:
|
|
error "Processing block before genesis, clock turned back?"
|
|
quit 1
|
|
|
|
let res = withBlck(entry.blck):
|
|
await self.storeBlock(
|
|
entry.src, wallTime, forkyBlck, entry.blobs, entry.maybeFinalized,
|
|
entry.queueTick, entry.validationDur)
|
|
|
|
if res.isErr and res.error[1] == ProcessingStatus.notCompleted:
|
|
# When an execution engine returns an error or fails to respond to a
|
|
# payload validity request for some block, a consensus engine:
|
|
# - MUST NOT optimistically import the block.
|
|
# - MUST NOT apply the block to the fork choice store.
|
|
# - MAY queue the block for later processing.
|
|
# https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.3/sync/optimistic.md#execution-engine-errors
|
|
await sleepAsync(chronos.seconds(1))
|
|
self[].enqueueBlock(
|
|
entry.src, entry.blck, entry.blobs, entry.resfut, entry.maybeFinalized,
|
|
entry.validationDur)
|
|
# To ensure backpressure on the sync manager, do not complete these futures.
|
|
return
|
|
|
|
if entry.resfut != nil:
|
|
entry.resfut.complete(
|
|
if res.isOk(): Result[void, VerifierError].ok()
|
|
else: Result[void, VerifierError].err(res.error()[0]))
|
|
|
|
proc runQueueProcessingLoop*(self: ref BlockProcessor) {.async.} =
|
|
while true:
|
|
# Cooperative concurrency: one block per loop iteration - because
|
|
# we run both networking and CPU-heavy things like block processing
|
|
# on the same thread, we need to make sure that there is steady progress
|
|
# on the networking side or we get long lockups that lead to timeouts.
|
|
const
|
|
# We cap waiting for an idle slot in case there's a lot of network traffic
|
|
# taking up all CPU - we don't want to _completely_ stop processing blocks
|
|
# in this case - doing so also allows us to benefit from more batching /
|
|
# larger network reads when under load.
|
|
idleTimeout = 10.milliseconds
|
|
|
|
discard await idleAsync().withTimeout(idleTimeout)
|
|
|
|
await self.processBlock(await self[].blockQueue.popFirst())
|