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nimbus-eth2/beacon_chain/sync/sync_protocol.nim

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# 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: [].}
import
chronicles, chronos, snappy, snappy/codec,
../spec/datatypes/[phase0, altair, bellatrix, capella, deneb],
../spec/[helpers, forks, network],
".."/[beacon_clock],
../networking/eth2_network,
../consensus_object_pools/blockchain_dag,
../rpc/rest_constants
logScope:
topics = "sync_proto"
const
blockResponseCost = allowedOpsPerSecondCost(64)
## Allow syncing ~64 blocks/sec (minus request costs)
blobResponseCost = allowedOpsPerSecondCost(1000)
## Multiple can exist per block, they are much smaller than blocks
type
BeaconSyncNetworkState* {.final.} = ref object of RootObj
dag: ChainDAGRef
cfg: RuntimeConfig
genesisBlockRoot: Eth2Digest
BlockRootSlot* = object
blockRoot: Eth2Digest
slot: Slot
BlockRootsList* = List[Eth2Digest, Limit MAX_REQUEST_BLOCKS]
BlobIdentifierList* = List[BlobIdentifier, Limit (MAX_REQUEST_BLOB_SIDECARS)]
proc readChunkPayload*(
conn: Connection, peer: Peer, MsgType: type (ref ForkedSignedBeaconBlock)):
Future[NetRes[MsgType]] {.async: (raises: [CancelledError]).} =
var contextBytes: ForkDigest
try:
await conn.readExactly(addr contextBytes, sizeof contextBytes)
except CatchableError:
return neterr UnexpectedEOF
let contextFork =
peer.network.forkDigests[].consensusForkForDigest(contextBytes).valueOr:
return neterr InvalidContextBytes
withConsensusFork(contextFork):
let res = await readChunkPayload(
conn, peer, consensusFork.SignedBeaconBlock)
if res.isOk:
return ok newClone(ForkedSignedBeaconBlock.init(res.get))
else:
return err(res.error)
proc readChunkPayload*(
conn: Connection, peer: Peer, MsgType: type (ForkedBlobSidecar)):
Future[NetRes[MsgType]] {.async: (raises: [CancelledError]).} =
var contextBytes: ForkDigest
try:
await conn.readExactly(addr contextBytes, sizeof contextBytes)
except CatchableError:
return neterr UnexpectedEOF
let
contextFork =
peer.network.forkDigests[].consensusForkForDigest(contextBytes).valueOr:
return neterr InvalidContextBytes
blobFork = blobForkAtConsensusFork(contextFork).valueOr:
return neterr InvalidContextBytes
withBlobFork(blobFork):
let res = await readChunkPayload(conn, peer, blobFork.BlobSidecar)
if res.isOk:
if contextFork != peer.network.cfg.consensusForkAtEpoch(
res.get.signed_block_header.message.slot.epoch):
return neterr InvalidContextBytes
return ok ForkedBlobSidecar.init(newClone(res.get))
else:
return err(res.error)
{.pop.} # TODO fix p2p macro for raises
p2pProtocol BeaconSync(version = 1,
networkState = BeaconSyncNetworkState):
proc beaconBlocksByRange_v2(
peer: Peer,
startSlot: Slot,
reqCount: uint64,
reqStep: uint64,
response: MultipleChunksResponse[
ref ForkedSignedBeaconBlock, Limit MAX_REQUEST_BLOCKS])
{.async, libp2pProtocol("beacon_blocks_by_range", 2).} =
# TODO Semantically, this request should return a non-ref, but doing so
# runs into extreme inefficiency due to the compiler introducing
# hidden copies - in future nim versions with move support, this should
# be revisited
# TODO This code is more complicated than it needs to be, since the type
# of the multiple chunks response is not actually used in this server
# implementation (it's used to derive the signature of the client
# function, not in the code below!)
# TODO although you can't tell from this function definition, a magic
# client call that returns `seq[ref ForkedSignedBeaconBlock]` will
# will be generated by the libp2p macro - we guarantee that seq items
# are `not-nil` in the implementation
# TODO reqStep is deprecated - future versions can remove support for
# values != 1: https://github.com/ethereum/consensus-specs/pull/2856
trace "got range request", peer, startSlot,
count = reqCount, step = reqStep
if reqCount == 0 or reqStep == 0:
raise newException(InvalidInputsError, "Empty range requested")
var blocks: array[MAX_REQUEST_BLOCKS.int, BlockId]
let
dag = peer.networkState.dag
# Limit number of blocks in response
count = int min(reqCount, blocks.lenu64)
endIndex = count - 1
startIndex =
dag.getBlockRange(startSlot, reqStep,
blocks.toOpenArray(0, endIndex))
var
found = 0
bytes: seq[byte]
for i in startIndex..endIndex:
if dag.getBlockSZ(blocks[i], bytes):
# In general, there is not much intermediate time between post-merge
# blocks all being optimistic and none of them being optimistic. The
# EL catches up, tells the CL the head is verified, and that's it.
if blocks[i].slot.epoch >= dag.cfg.BELLATRIX_FORK_EPOCH and
not dag.head.executionValid:
continue
let uncompressedLen = uncompressedLenFramed(bytes).valueOr:
warn "Cannot read block size, database corrupt?",
bytes = bytes.len(), blck = shortLog(blocks[i])
continue
# TODO extract from libp2pProtocol
peer.awaitQuota(blockResponseCost, "beacon_blocks_by_range/2")
peer.network.awaitQuota(blockResponseCost, "beacon_blocks_by_range/2")
await response.writeBytesSZ(
uncompressedLen, bytes,
peer.network.forkDigestAtEpoch(blocks[i].slot.epoch).data)
inc found
debug "Block range request done",
peer, startSlot, count, reqStep
proc beaconBlocksByRoot_v2(
peer: Peer,
# Please note that the SSZ list here ensures that the
# spec constant MAX_REQUEST_BLOCKS is enforced:
blockRoots: BlockRootsList,
response: MultipleChunksResponse[
ref ForkedSignedBeaconBlock, Limit MAX_REQUEST_BLOCKS])
{.async, libp2pProtocol("beacon_blocks_by_root", 2).} =
# TODO Semantically, this request should return a non-ref, but doing so
# runs into extreme inefficiency due to the compiler introducing
# hidden copies - in future nim versions with move support, this should
# be revisited
# TODO This code is more complicated than it needs to be, since the type
# of the multiple chunks response is not actually used in this server
# implementation (it's used to derive the signature of the client
# function, not in the code below!)
# TODO although you can't tell from this function definition, a magic
# client call that returns `seq[ref ForkedSignedBeaconBlock]` will
# will be generated by the libp2p macro - we guarantee that seq items
# are `not-nil` in the implementation
if blockRoots.len == 0:
raise newException(InvalidInputsError, "No blocks requested")
let
dag = peer.networkState.dag
count = blockRoots.len
var
found = 0
bytes: seq[byte]
for i in 0..<count:
let
blockRef = dag.getBlockRef(blockRoots[i]).valueOr:
continue
if dag.getBlockSZ(blockRef.bid, bytes):
# In general, there is not much intermediate time between post-merge
# blocks all being optimistic and none of them being optimistic. The
# EL catches up, tells the CL the head is verified, and that's it.
if blockRef.slot.epoch >= dag.cfg.BELLATRIX_FORK_EPOCH and
not dag.head.executionValid:
continue
let uncompressedLen = uncompressedLenFramed(bytes).valueOr:
warn "Cannot read block size, database corrupt?",
bytes = bytes.len(), blck = shortLog(blockRef)
continue
# TODO extract from libp2pProtocol
peer.awaitQuota(blockResponseCost, "beacon_blocks_by_root/2")
peer.network.awaitQuota(blockResponseCost, "beacon_blocks_by_root/2")
await response.writeBytesSZ(
uncompressedLen, bytes,
peer.network.forkDigestAtEpoch(blockRef.slot.epoch).data)
inc found
debug "Block root request done",
peer, roots = blockRoots.len, count, found
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/deneb/p2p-interface.md#blobsidecarsbyroot-v1
proc blobSidecarsByRoot(
peer: Peer,
blobIds: BlobIdentifierList,
response: MultipleChunksResponse[
ForkedBlobSidecar, Limit(MAX_REQUEST_BLOB_SIDECARS)])
{.async, libp2pProtocol("blob_sidecars_by_root", 1).} =
# TODO Semantically, this request should return a non-ref, but doing so
# runs into extreme inefficiency due to the compiler introducing
# hidden copies - in future nim versions with move support, this should
# be revisited
# TODO This code is more complicated than it needs to be, since the type
# of the multiple chunks response is not actually used in this server
# implementation (it's used to derive the signature of the client
# function, not in the code below!)
# TODO although you can't tell from this function definition, a magic
# client call that returns `seq[ForkedBlobSidecar]` will
# will be generated by the libp2p macro - we guarantee that seq items
# are `not-nil` in the implementation
trace "got blobs range request", peer, len = blobIds.len
if blobIds.len == 0:
raise newException(InvalidInputsError, "No blobs requested")
let
dag = peer.networkState.dag
count = blobIds.len
var
found = 0
bytes: seq[byte]
for i in 0..<count:
let
blockRef = dag.getBlockRef(blobIds[i].block_root).valueOr:
continue
consensusFork = dag.cfg.consensusForkAtEpoch(blockRef.bid.slot.epoch)
blobFork = blobForkAtConsensusFork(consensusFork).valueOr:
continue # Pre-Deneb
index = blobIds[i].index
ok = withBlobFork(blobFork):
getBlobSidecarSZ[blobFork.BlobSidecar](
dag.db, blockRef.bid.root, index, bytes)
if ok:
let uncompressedLen = uncompressedLenFramed(bytes).valueOr:
warn "Cannot read blob size, database corrupt?",
bytes = bytes.len(), blck = shortLog(blockRef), blobindex = index
continue
peer.awaitQuota(blobResponseCost, "blob_sidecars_by_root/1")
peer.network.awaitQuota(blobResponseCost, "blob_sidecars_by_root/1")
await response.writeBytesSZ(
uncompressedLen, bytes,
peer.network.forkDigestAtEpoch(blockRef.slot.epoch).data)
inc found
debug "Blob root request done",
peer, roots = blobIds.len, count, found
# https://github.com/ethereum/consensus-specs/blob/v1.3.0/specs/deneb/p2p-interface.md#blobsidecarsbyrange-v1
proc blobSidecarsByRange(
peer: Peer,
startSlot: Slot,
reqCount: uint64,
response: MultipleChunksResponse[
ForkedBlobSidecar, Limit(MAX_REQUEST_BLOB_SIDECARS)])
{.async, libp2pProtocol("blob_sidecars_by_range", 1).} =
# TODO This code is more complicated than it needs to be, since the type
# of the multiple chunks response is not actually used in this server
# implementation (it's used to derive the signature of the client
# function, not in the code below!)
# TODO although you can't tell from this function definition, a magic
# client call that returns `seq[ForkedBlobSidecar]` will
# will be generated by the libp2p macro - we guarantee that seq items
# are `not-nil` in the implementation
trace "got blobs range request", peer, startSlot, count = reqCount
if reqCount == 0:
raise newException(InvalidInputsError, "Empty range requested")
let
dag = peer.networkState.dag
epochBoundary =
if dag.cfg.MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS >= dag.head.slot.epoch:
GENESIS_EPOCH
else:
dag.head.slot.epoch - dag.cfg.MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS
if startSlot.epoch < epochBoundary:
raise newException(ResourceUnavailableError, BlobsOutOfRange)
var blockIds: array[int(MAX_REQUEST_BLOB_SIDECARS), BlockId]
let
count = int min(reqCount, blockIds.lenu64)
endIndex = count - 1
startIndex =
dag.getBlockRange(startSlot, 1, blockIds.toOpenArray(0, endIndex))
var
found = 0
bytes: seq[byte]
for i in startIndex..endIndex:
let
consensusFork = dag.cfg.consensusForkAtEpoch(blockIds[i].slot.epoch)
blobFork = blobForkAtConsensusFork(consensusFork).valueOr:
continue # Pre-Deneb
for j in 0..<MAX_BLOBS_PER_BLOCK:
let ok = withBlobFork(blobFork):
getBlobSidecarSZ[blobFork.BlobSidecar](
dag.db, blockIds[i].root, BlobIndex(j), bytes)
if ok:
# In general, there is not much intermediate time between post-merge
# blocks all being optimistic and none of them being optimistic. The
# EL catches up, tells the CL the head is verified, and that's it.
if blockIds[i].slot.epoch >= dag.cfg.BELLATRIX_FORK_EPOCH and
not dag.head.executionValid:
continue
let uncompressedLen = uncompressedLenFramed(bytes).valueOr:
warn "Cannot read blobs sidecar size, database corrupt?",
bytes = bytes.len(), blck = shortLog(blockIds[i])
continue
# TODO extract from libp2pProtocol
peer.awaitQuota(blobResponseCost, "blobs_sidecars_by_range/1")
peer.network.awaitQuota(blobResponseCost, "blobs_sidecars_by_range/1")
await response.writeBytesSZ(
uncompressedLen, bytes,
peer.network.forkDigestAtEpoch(blockIds[i].slot.epoch).data)
inc found
else:
break
debug "BlobSidecar range request done",
peer, startSlot, count = reqCount, found
proc init*(T: type BeaconSync.NetworkState, dag: ChainDAGRef): T =
T(
dag: dag,
)
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