321 lines
11 KiB
Nim
321 lines
11 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 std/[sequtils, strutils]
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import chronos, chronicles
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import
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../spec/datatypes/[phase0, deneb],
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../spec/[forks, network],
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../networking/eth2_network,
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../consensus_object_pools/block_quarantine,
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../consensus_object_pools/blob_quarantine,
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"."/sync_protocol, "."/sync_manager,
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../gossip_processing/block_processor
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from ../beacon_clock import GetBeaconTimeFn
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export block_quarantine, sync_manager
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logScope:
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topics = "requman"
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const
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SYNC_MAX_REQUESTED_BLOCKS* = 32 # Spec allows up to MAX_REQUEST_BLOCKS.
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## Maximum number of blocks which will be requested in each
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## `beaconBlocksByRoot` invocation.
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PARALLEL_REQUESTS* = 2
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## Number of peers we using to resolve our request.
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BLOB_GOSSIP_WAIT_TIME_NS* = 2 * 1_000_000_000
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## How long to wait for blobs to arrive over gossip before fetching.
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type
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BlockVerifier* =
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proc(signedBlock: ForkedSignedBeaconBlock, maybeFinalized: bool):
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Future[Result[void, VerifierError]] {.gcsafe, raises: [Defect].}
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RequestManager* = object
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network*: Eth2Node
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inpBlockQueue*: AsyncQueue[FetchRecord]
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inpBlobQueue: AsyncQueue[BlobIdentifier]
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getBeaconTime: GetBeaconTimeFn
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quarantine: ref Quarantine
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blobQuarantine: ref BlobQuarantine
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blockVerifier: BlockVerifier
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blockLoopFuture: Future[void]
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blobLoopFuture: Future[void]
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func shortLog*(x: seq[Eth2Digest]): string =
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"[" & x.mapIt(shortLog(it)).join(", ") & "]"
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func shortLog*(x: seq[FetchRecord]): string =
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"[" & x.mapIt(shortLog(it.root)).join(", ") & "]"
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proc init*(T: type RequestManager, network: Eth2Node,
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denebEpoch: Epoch,
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getBeaconTime: GetBeaconTimeFn,
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quarantine: ref Quarantine,
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blobQuarantine: ref BlobQuarantine,
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blockVerifier: BlockVerifier): RequestManager =
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RequestManager(
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network: network,
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inpBlockQueue: newAsyncQueue[FetchRecord](),
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inpBlobQueue: newAsyncQueue[BlobIdentifier](),
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getBeaconTime: getBeaconTime,
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quarantine: quarantine,
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blobQuarantine: blobQuarantine,
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blockVerifier: blockVerifier,
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)
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proc checkResponse(roots: openArray[Eth2Digest],
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blocks: openArray[ref ForkedSignedBeaconBlock]): bool =
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## This procedure checks peer's response.
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var checks = @roots
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if len(blocks) > len(roots):
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return false
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for blk in blocks:
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let res = checks.find(blk[].root)
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if res == -1:
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return false
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else:
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checks.del(res)
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true
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proc checkResponse(idList: seq[BlobIdentifier],
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blobs: openArray[ref BlobSidecar]): bool =
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if len(blobs) > len(idList):
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return false
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for blob in blobs:
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var found = false
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for id in idList:
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if id.block_root == blob.block_root and
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id.index == blob.index:
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found = true
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break
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if not found:
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return false
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true
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proc fetchAncestorBlocksFromNetwork(rman: RequestManager,
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items: seq[Eth2Digest]) {.async.} =
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var peer: Peer
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try:
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peer = await rman.network.peerPool.acquire()
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debug "Requesting blocks by root", peer = peer, blocks = shortLog(items),
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peer_score = peer.getScore()
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let blocks = (await beaconBlocksByRoot_v2(peer, BlockRootsList items))
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if blocks.isOk:
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let ublocks = blocks.get()
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if checkResponse(items, ublocks.asSeq()):
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var
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gotGoodBlock = false
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gotUnviableBlock = false
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for b in ublocks:
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let ver = await rman.blockVerifier(b[], false)
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if ver.isErr():
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case ver.error()
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of VerifierError.MissingParent:
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# Ignoring because the order of the blocks that
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# we requested may be different from the order in which we need
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# these blocks to apply.
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discard
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of VerifierError.Duplicate:
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# Ignoring because these errors could occur due to the
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# concurrent/parallel requests we made.
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discard
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of VerifierError.UnviableFork:
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# If they're working a different fork, we'll want to descore them
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# but also process the other blocks (in case we can register the
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# other blocks as unviable)
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gotUnviableBlock = true
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of VerifierError.Invalid:
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# We stop processing blocks because peer is either sending us
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# junk or working a different fork
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notice "Received invalid block",
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peer = peer, blocks = shortLog(items),
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peer_score = peer.getScore()
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peer.updateScore(PeerScoreBadValues)
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return # Stop processing this junk...
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else:
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gotGoodBlock = true
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if gotUnviableBlock:
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notice "Received blocks from an unviable fork",
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peer = peer, blocks = shortLog(items),
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peer_score = peer.getScore()
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peer.updateScore(PeerScoreUnviableFork)
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elif gotGoodBlock:
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# We reward peer only if it returns something.
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peer.updateScore(PeerScoreGoodValues)
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else:
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peer.updateScore(PeerScoreBadResponse)
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else:
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peer.updateScore(PeerScoreNoValues)
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except CancelledError as exc:
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raise exc
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except CatchableError as exc:
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peer.updateScore(PeerScoreNoValues)
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debug "Error while fetching ancestor blocks", exc = exc.msg,
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items = shortLog(items), peer = peer, peer_score = peer.getScore()
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raise exc
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finally:
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if not(isNil(peer)):
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rman.network.peerPool.release(peer)
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proc fetchBlobsFromNetwork(self: RequestManager,
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idList: seq[BlobIdentifier]) {.async.} =
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var peer: Peer
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try:
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peer = await self.network.peerPool.acquire()
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debug "Requesting blobs by root", peer = peer, blobs = shortLog(idList),
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peer_score = peer.getScore()
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let blobs = (await blobSidecarsByRoot(peer, BlobIdentifierList idList))
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if blobs.isOk:
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let ublobs = blobs.get()
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if not checkResponse(idList, ublobs.asSeq()):
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peer.updateScore(PeerScoreBadResponse)
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return
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for b in ublobs:
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self.blobQuarantine[].put(b)
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var curRoot: Eth2Digest
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for b in ublobs:
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if b.block_root != curRoot:
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curRoot = b.block_root
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if (let o = self.quarantine[].popBlobless(curRoot); o.isSome):
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let b = o.unsafeGet()
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discard await self.blockVerifier(ForkedSignedBeaconBlock.init(b), false)
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# TODO:
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# If appropriate, return a VerifierError.InvalidBlob from verification,
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# check for it here, and penalize the peer accordingly.
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except CancelledError as exc:
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raise exc
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except CatchableError as exc:
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peer.updateScore(PeerScoreNoValues)
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debug "Error while fetching blobs", exc = exc.msg,
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idList = shortLog(idList), peer = peer, peer_score = peer.getScore()
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raise exc
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finally:
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if not(isNil(peer)):
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self.network.peerPool.release(peer)
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proc requestManagerBlockLoop(rman: RequestManager) {.async.} =
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var rootList = newSeq[Eth2Digest]()
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var workers = newSeq[Future[void]](PARALLEL_REQUESTS)
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while true:
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try:
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rootList.setLen(0)
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let req = await rman.inpBlockQueue.popFirst()
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rootList.add(req.root)
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var count = min(SYNC_MAX_REQUESTED_BLOCKS - 1, len(rman.inpBlockQueue))
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while count > 0:
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rootList.add(rman.inpBlockQueue.popFirstNoWait().root)
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dec(count)
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let start = SyncMoment.now(0)
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for i in 0 ..< PARALLEL_REQUESTS:
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workers[i] = rman.fetchAncestorBlocksFromNetwork(rootList)
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# We do not care about
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await allFutures(workers)
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let finish = SyncMoment.now(uint64(len(rootList)))
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var succeed = 0
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for worker in workers:
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if worker.finished() and not(worker.failed()):
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inc(succeed)
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debug "Request manager block tick", blocks_count = len(rootList),
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succeed = succeed,
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failed = (len(workers) - succeed),
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queue_size = len(rman.inpBlockQueue),
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sync_speed = speed(start, finish)
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except CatchableError as exc:
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debug "Got a problem in request manager", exc = exc.msg
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proc requestManagerBlobLoop(rman: RequestManager) {.async.} =
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var idList = newSeq[BlobIdentifier]()
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var workers = newSeq[Future[void]](PARALLEL_REQUESTS)
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while true:
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try:
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idList.setLen(0)
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let id = await rman.inpBlobQueue.popFirst()
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idList.add(id)
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var count = min(MAX_REQUEST_BLOB_SIDECARS - 1, lenu64(rman.inpBlobQueue))
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while count > 0:
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idList.add(rman.inpBlobQueue.popFirstNoWait())
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dec(count)
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let start = SyncMoment.now(0)
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for i in 0 ..< PARALLEL_REQUESTS:
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workers[i] = rman.fetchBlobsFromNetwork(idList)
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await allFutures(workers)
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var succeed = 0
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for worker in workers:
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if worker.finished() and not(worker.failed()):
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inc(succeed)
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debug "Request manager blob tick", blobs_count = len(idList),
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succeed = succeed,
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failed = (len(workers) - succeed),
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queue_size = len(rman.inpBlobQueue)
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except CatchableError as exc:
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debug "Got a problem in request manager", exc = exc.msg
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proc start*(rman: var RequestManager) =
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## Start Request Manager's loops.
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rman.blockLoopFuture = rman.requestManagerBlockLoop()
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rman.blobLoopFuture = rman.requestManagerBlobLoop()
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proc stop*(rman: RequestManager) =
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## Stop Request Manager's loop.
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if not(isNil(rman.blockLoopFuture)):
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rman.blockLoopFuture.cancel()
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if not(isNil(rman.blobLoopFuture)):
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rman.blobLoopFuture.cancel()
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proc fetchAncestorBlocks*(rman: RequestManager, roots: seq[FetchRecord]) =
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## Enqueue list missing blocks roots ``roots`` for download by
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## Request Manager ``rman``.
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for item in roots:
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try:
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rman.inpBlockQueue.addLastNoWait(item)
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except AsyncQueueFullError: raiseAssert "unbounded queue"
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proc fetchMissingBlobs*(rman: RequestManager,
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recs: seq[BlobFetchRecord]) =
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var idList: seq[BlobIdentifier]
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for r in recs:
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for idx in r.indices:
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idList.add(BlobIdentifier(block_root: r.block_root, index: idx))
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for id in idList:
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try:
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rman.inpBlobQueue.addLastNoWait(id)
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except AsyncQueueFullError: raiseAssert "unbounded queue"
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