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nimbus-eth2/beacon_chain/rpc/rest_validator_api.nim
Jacek Sieka 05ffe7b2bf
Prune BlockRef on finalization (#3513) 
Up til now, the block dag has been using `BlockRef`, a structure adapted
for a full DAG, to represent all of chain history. This is a correct and
simple design, but does not exploit the linearity of the chain once
parts of it finalize.

By pruning the in-memory `BlockRef` structure at finalization, we save,
at the time of writing, a cool ~250mb (or 25%:ish) chunk of memory
landing us at a steady state of ~750mb normal memory usage for a
validating node.

Above all though, we prevent memory usage from growing proportionally
with the length of the chain, something that would not be sustainable
over time -  instead, the steady state memory usage is roughly
determined by the validator set size which grows much more slowly. With
these changes, the core should remain sustainable memory-wise post-merge
all the way to withdrawals (when the validator set is expected to grow).

In-memory indices are still used for the "hot" unfinalized portion of
the chain - this ensure that consensus performance remains unchanged.

What changes is that for historical access, we use a db-based linear
slot index which is cache-and-disk-friendly, keeping the cost for
accessing historical data at a similar level as before, achieving the
savings at no percievable cost to functionality or performance.

A nice collateral benefit is the almost-instant startup since we no
longer load any large indicies at dag init.

The cost of this functionality instead can be found in the complexity of
having to deal with two ways of traversing the chain - by `BlockRef` and
by slot.

* use `BlockId` instead of `BlockRef` where finalized / historical data
may be required
* simplify clearance pre-advancement
* remove dag.finalizedBlocks (~50:ish mb)
* remove `getBlockAtSlot` - use `getBlockIdAtSlot` instead
* `parent` and `atSlot` for `BlockId` now require a `ChainDAGRef`
instance, unlike `BlockRef` traversal
* prune `BlockRef` parents on finality (~200:ish mb)
* speed up ChainDAG init by not loading finalized history index
* mess up light client server error handling - this need revisiting :)
2022-03-17 17:42:56 +00:00

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# Copyright (c) 2018-2021 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.
import std/[typetraits, strutils, sets]
import stew/[results, base10], chronicles
import ".."/[beacon_chain_db, beacon_node],
".."/networking/eth2_network,
".."/consensus_object_pools/[blockchain_dag, spec_cache,
attestation_pool, sync_committee_msg_pool],
".."/validators/validator_duties,
".."/spec/[beaconstate, forks, network],
".."/spec/datatypes/[phase0, altair],
"."/[rest_utils, state_ttl_cache]
export rest_utils
logScope: topics = "rest_validatorapi"
proc installValidatorApiHandlers*(router: var RestRouter, node: BeaconNode) =
# https://ethereum.github.io/beacon-APIs/#/Validator/getAttesterDuties
router.api(MethodPost, "/eth/v1/validator/duties/attester/{epoch}") do (
epoch: Epoch, contentBody: Option[ContentBody]) -> RestApiResponse:
let indexList =
block:
if contentBody.isNone():
return RestApiResponse.jsonError(Http400, EmptyRequestBodyError)
let dres = decodeBody(seq[RestValidatorIndex], contentBody.get())
if dres.isErr():
return RestApiResponse.jsonError(Http400,
InvalidValidatorIndexValueError,
$dres.error())
var res: HashSet[ValidatorIndex]
let items = dres.get()
for item in items:
let vres = item.toValidatorIndex()
if vres.isErr():
case vres.error()
of ValidatorIndexError.TooHighValue:
return RestApiResponse.jsonError(Http400,
TooHighValidatorIndexValueError)
of ValidatorIndexError.UnsupportedValue:
return RestApiResponse.jsonError(Http500,
UnsupportedValidatorIndexValueError)
res.incl(vres.get())
if len(res) == 0:
return RestApiResponse.jsonError(Http400,
EmptyValidatorIndexArrayError)
res
let qepoch =
block:
if epoch.isErr():
return RestApiResponse.jsonError(Http400, InvalidEpochValueError,
$epoch.error())
let
res = epoch.get()
wallTime = node.beaconClock.now() + MAXIMUM_GOSSIP_CLOCK_DISPARITY
wallEpoch = wallTime.slotOrZero().epoch
if res > wallEpoch + 1:
return RestApiResponse.jsonError(Http400, InvalidEpochValueError,
"Cannot request duties past next epoch")
res
let qhead =
block:
let res = node.getCurrentHead(qepoch)
if res.isErr():
return RestApiResponse.jsonError(Http503, BeaconNodeInSyncError)
res.get()
let epochRef = node.dag.getEpochRef(qhead, qepoch, true).valueOr:
return RestApiResponse.jsonError(Http400, PrunedStateError)
let duties =
block:
var res: seq[RestAttesterDuty]
let
committees_per_slot = get_committee_count_per_slot(epochRef)
for committee_index in get_committee_indices(committees_per_slot):
for slot in qepoch.slots():
let committee = get_beacon_committee(epochRef, slot, committee_index)
for index_in_committee, validator_index in committee:
if validator_index in indexList:
let validator_key = epochRef.validatorKey(validator_index)
if validator_key.isSome():
res.add(
RestAttesterDuty(
pubkey: validator_key.get().toPubKey(),
validator_index: validator_index,
committee_index: committee_index,
committee_length: lenu64(committee),
committees_at_slot: committees_per_slot,
validator_committee_index: uint64(index_in_committee),
slot: slot
)
)
res
return RestApiResponse.jsonResponseWRoot(
duties, epochRef.attester_dependent_root)
# https://ethereum.github.io/beacon-APIs/#/Validator/getProposerDuties
router.api(MethodGet, "/eth/v1/validator/duties/proposer/{epoch}") do (
epoch: Epoch) -> RestApiResponse:
let qepoch =
block:
if epoch.isErr():
return RestApiResponse.jsonError(Http400, InvalidEpochValueError,
$epoch.error())
let
res = epoch.get()
wallTime = node.beaconClock.now() + MAXIMUM_GOSSIP_CLOCK_DISPARITY
wallEpoch = wallTime.slotOrZero().epoch
if res > wallEpoch + 1:
return RestApiResponse.jsonError(Http400, InvalidEpochValueError,
"Cannot request duties past next epoch")
res
let qhead =
block:
let res = node.getCurrentHead(qepoch)
if res.isErr():
return RestApiResponse.jsonError(Http503, BeaconNodeInSyncError)
res.get()
let epochRef = node.dag.getEpochRef(qhead, qepoch, true).valueOr:
return RestApiResponse.jsonError(Http400, PrunedStateError)
let duties =
block:
var res: seq[RestProposerDuty]
for i, bp in epochRef.beacon_proposers:
if i == 0 and qepoch == 0:
# Fix for https://github.com/status-im/nimbus-eth2/issues/2488
# Slot(0) at Epoch(0) do not have a proposer.
continue
if bp.isSome():
res.add(
RestProposerDuty(
pubkey: epochRef.validatorKey(bp.get()).get().toPubKey(),
validator_index: bp.get(),
slot: qepoch.start_slot() + i
)
)
res
return RestApiResponse.jsonResponseWRoot(
duties, epochRef.proposer_dependent_root)
router.api(MethodPost, "/eth/v1/validator/duties/sync/{epoch}") do (
epoch: Epoch, contentBody: Option[ContentBody]) -> RestApiResponse:
let indexList =
block:
if contentBody.isNone():
return RestApiResponse.jsonError(Http400, EmptyRequestBodyError)
let dres = decodeBody(seq[RestValidatorIndex], contentBody.get())
if dres.isErr():
return RestApiResponse.jsonError(Http400,
InvalidValidatorIndexValueError,
$dres.error())
var res: seq[ValidatorIndex]
let items = dres.get()
for item in items:
let vres = item.toValidatorIndex()
if vres.isErr():
case vres.error()
of ValidatorIndexError.TooHighValue:
return RestApiResponse.jsonError(Http400,
TooHighValidatorIndexValueError)
of ValidatorIndexError.UnsupportedValue:
return RestApiResponse.jsonError(Http500,
UnsupportedValidatorIndexValueError)
res.add(vres.get())
if len(res) == 0:
return RestApiResponse.jsonError(Http400,
EmptyValidatorIndexArrayError)
res
let qepoch =
block:
if epoch.isErr():
return RestApiResponse.jsonError(Http400, InvalidEpochValueError,
$epoch.error())
let res = epoch.get()
if res > MaxEpoch:
return RestApiResponse.jsonError(Http400, EpochOverflowValueError)
res
# We use a local proc in order to:
# * avoid code duplication
# * reduce code bloat from `withState`
proc produceResponse(requestedValidatorIndices: openArray[ValidatorIndex],
syncCommittee: openArray[ValidatorPubKey],
stateValidators: seq[Validator]
): seq[RestSyncCommitteeDuty] {.nimcall.} =
result = newSeqOfCap[RestSyncCommitteeDuty](len(requestedValidatorIndices))
for requestedValidatorIdx in requestedValidatorIndices:
if requestedValidatorIdx.uint64 >= stateValidators.lenu64:
# If the requested validator index was not valid within this old
# state, it's not possible that it will sit on the sync committee.
# Since this API must omit results for validators that don't have
# duties, we can simply ingnore this requested index.
# (we won't bother to validate it agains a more recent state).
continue
let requestedValidatorPubkey =
stateValidators[requestedValidatorIdx].pubkey
var indicesInSyncCommittee = newSeq[IndexInSyncCommittee]()
for idx, syncCommitteeMemberPubkey in syncCommittee:
if syncCommitteeMemberPubkey == requestedValidatorPubkey:
indicesInSyncCommittee.add(IndexInSyncCommittee idx)
if indicesInSyncCommittee.len > 0:
result.add RestSyncCommitteeDuty(
pubkey: requestedValidatorPubkey,
validator_index: requestedValidatorIdx,
validator_sync_committee_indices: indicesInSyncCommittee)
template emptyResponse: auto =
newSeq[RestSyncCommitteeDuty]()
# We check the head state first in order to avoid costly replays
# if possible:
let
qSyncPeriod = sync_committee_period(qepoch)
headEpoch = node.dag.head.slot.epoch
headSyncPeriod = sync_committee_period(headEpoch)
if qSyncPeriod == headSyncPeriod:
let res = withState(node.dag.headState):
when stateFork >= BeaconStateFork.Altair:
produceResponse(indexList,
state.data.current_sync_committee.pubkeys.data,
state.data.validators.asSeq)
else:
emptyResponse()
return RestApiResponse.jsonResponse(res)
elif qSyncPeriod == (headSyncPeriod + 1):
let res = withState(node.dag.headState):
when stateFork >= BeaconStateFork.Altair:
produceResponse(indexList,
state.data.next_sync_committee.pubkeys.data,
state.data.validators.asSeq)
else:
emptyResponse()
return RestApiResponse.jsonResponse(res)
elif qSyncPeriod > headSyncPeriod:
# The requested epoch may still be too far in the future.
if not(node.isSynced(node.dag.head)):
return RestApiResponse.jsonError(Http503, BeaconNodeInSyncError)
else:
return RestApiResponse.jsonError(Http400, EpochFromFutureError)
else:
# The slot at the start of the sync committee period is likely to have a
# state snapshot in the database, so we can restore the state relatively
# cheaply:
let earliestSlotInQSyncPeriod =
Slot(qSyncPeriod * SLOTS_PER_SYNC_COMMITTEE_PERIOD)
# TODO
# The DAG can offer a short-cut for getting just the information we need
# in order to compute the sync committee for the epoch. See the following
# discussion for more details:
# https://github.com/status-im/nimbus-eth2/pull/3133#pullrequestreview-817184693
let bsi = node.dag.getBlockIdAtSlot(earliestSlotInQSyncPeriod).valueOr:
return RestApiResponse.jsonError(Http404, StateNotFoundError)
node.withStateForBlockSlotId(bsi):
let res = withState(state):
when stateFork >= BeaconStateFork.Altair:
produceResponse(indexList,
state.data.current_sync_committee.pubkeys.data,
state.data.validators.asSeq)
else:
emptyResponse()
return RestApiResponse.jsonResponse(res)
return RestApiResponse.jsonError(Http404, StateNotFoundError)
# https://ethereum.github.io/beacon-APIs/#/Validator/produceBlock
router.api(MethodGet, "/eth/v1/validator/blocks/{slot}") do (
slot: Slot, randao_reveal: Option[ValidatorSig],
graffiti: Option[GraffitiBytes]) -> RestApiResponse:
let message =
block:
let qslot =
block:
if slot.isErr():
return RestApiResponse.jsonError(Http400, InvalidSlotValueError,
$slot.error())
slot.get()
let qrandao =
if randao_reveal.isNone():
return RestApiResponse.jsonError(Http400, MissingRandaoRevealValue)
else:
let res = randao_reveal.get()
if res.isErr():
return RestApiResponse.jsonError(Http400,
InvalidRandaoRevealValue,
$res.error())
res.get()
let qgraffiti =
if graffiti.isNone():
defaultGraffitiBytes()
else:
let res = graffiti.get()
if res.isErr():
return RestApiResponse.jsonError(Http400,
InvalidGraffitiBytesValue,
$res.error())
res.get()
let qhead =
block:
let res = node.getCurrentHead(qslot)
if res.isErr():
if not(node.isSynced(node.dag.head)):
return RestApiResponse.jsonError(Http503, BeaconNodeInSyncError)
else:
return RestApiResponse.jsonError(Http400, NoHeadForSlotError,
$res.error())
res.get()
let proposer = node.dag.getProposer(qhead, qslot)
if proposer.isNone():
return RestApiResponse.jsonError(Http400, ProposerNotFoundError)
let res = await makeBeaconBlockForHeadAndSlot(
node, qrandao, proposer.get(), qgraffiti, qhead, qslot)
if res.isErr():
return RestApiResponse.jsonError(Http400, res.error())
res.get()
return
case message.kind
of BeaconBlockFork.Phase0:
RestApiResponse.jsonResponse(message.phase0Data)
else:
RestApiResponse.jsonError(Http400,
"Unable to produce block for altair fork")
# https://ethereum.github.io/beacon-APIs/#/Validator/produceBlockV2
router.api(MethodGet, "/eth/v2/validator/blocks/{slot}") do (
slot: Slot, randao_reveal: Option[ValidatorSig],
graffiti: Option[GraffitiBytes]) -> RestApiResponse:
let message =
block:
let qslot =
block:
if slot.isErr():
return RestApiResponse.jsonError(Http400, InvalidSlotValueError,
$slot.error())
slot.get()
let qrandao =
if randao_reveal.isNone():
return RestApiResponse.jsonError(Http400, MissingRandaoRevealValue)
else:
let res = randao_reveal.get()
if res.isErr():
return RestApiResponse.jsonError(Http400,
InvalidRandaoRevealValue,
$res.error())
res.get()
let qgraffiti =
if graffiti.isNone():
defaultGraffitiBytes()
else:
let res = graffiti.get()
if res.isErr():
return RestApiResponse.jsonError(Http400,
InvalidGraffitiBytesValue,
$res.error())
res.get()
let qhead =
block:
let res = node.getCurrentHead(qslot)
if res.isErr():
if not(node.isSynced(node.dag.head)):
return RestApiResponse.jsonError(Http503, BeaconNodeInSyncError)
else:
return RestApiResponse.jsonError(Http400, NoHeadForSlotError,
$res.error())
res.get()
let proposer = node.dag.getProposer(qhead, qslot)
if proposer.isNone():
return RestApiResponse.jsonError(Http400, ProposerNotFoundError)
let res = await makeBeaconBlockForHeadAndSlot(
node, qrandao, proposer.get(), qgraffiti, qhead, qslot)
if res.isErr():
return RestApiResponse.jsonError(Http400, res.error())
res.get()
return RestApiResponse.jsonResponsePlain(message)
# https://ethereum.github.io/beacon-APIs/#/Validator/produceAttestationData
router.api(MethodGet, "/eth/v1/validator/attestation_data") do (
slot: Option[Slot],
committee_index: Option[CommitteeIndex]) -> RestApiResponse:
let adata =
block:
let qslot =
block:
if slot.isNone():
return RestApiResponse.jsonError(Http400, MissingSlotValueError)
let res = slot.get()
if res.isErr():
return RestApiResponse.jsonError(Http400, InvalidSlotValueError,
$res.error())
res.get()
let qindex =
block:
if committee_index.isNone():
return RestApiResponse.jsonError(Http400,
MissingCommitteeIndexValueError)
let res = committee_index.get()
if res.isErr():
return RestApiResponse.jsonError(Http400,
InvalidCommitteeIndexValueError,
$res.error())
res.get()
let qhead =
block:
let res = node.getCurrentHead(qslot)
if res.isErr():
return RestApiResponse.jsonError(Http503, BeaconNodeInSyncError)
res.get()
let epochRef = block:
let tmp = node.dag.getEpochRef(qhead, qslot.epoch, true)
if isErr(tmp):
return RestApiResponse.jsonError(Http400, PrunedStateError)
tmp.get()
makeAttestationData(epochRef, qhead.atSlot(qslot), qindex)
return RestApiResponse.jsonResponse(adata)
# https://ethereum.github.io/beacon-APIs/#/Validator/getAggregatedAttestation
router.api(MethodGet, "/eth/v1/validator/aggregate_attestation") do (
attestation_data_root: Option[Eth2Digest],
slot: Option[Slot]) -> RestApiResponse:
let attestation =
block:
let qslot =
block:
if slot.isNone():
return RestApiResponse.jsonError(Http400, MissingSlotValueError)
let res = slot.get()
if res.isErr():
return RestApiResponse.jsonError(Http400, InvalidSlotValueError,
$res.error())
res.get()
let qroot =
block:
if attestation_data_root.isNone():
return RestApiResponse.jsonError(Http400,
MissingAttestationDataRootValueError)
let res = attestation_data_root.get()
if res.isErr():
return RestApiResponse.jsonError(Http400,
InvalidAttestationDataRootValueError, $res.error())
res.get()
let res = node.attestationPool[].getAggregatedAttestation(qslot, qroot)
if res.isNone():
return RestApiResponse.jsonError(Http400,
UnableToGetAggregatedAttestationError)
res.get()
return RestApiResponse.jsonResponse(attestation)
# https://ethereum.github.io/beacon-APIs/#/Validator/publishAggregateAndProofs
router.api(MethodPost, "/eth/v1/validator/aggregate_and_proofs") do (
contentBody: Option[ContentBody]) -> RestApiResponse:
let proofs =
block:
if contentBody.isNone():
return RestApiResponse.jsonError(Http400, EmptyRequestBodyError)
let dres = decodeBody(seq[SignedAggregateAndProof], contentBody.get())
if dres.isErr():
return RestApiResponse.jsonError(Http400,
InvalidAggregateAndProofObjectError,
$dres.error())
dres.get()
# Since our validation logic supports batch processing, we will submit all
# aggregated attestations for validation.
var pending =
block:
var res: seq[Future[SendResult]]
for proof in proofs:
res.add(node.sendAggregateAndProof(proof))
res
await allFutures(pending)
for future in pending:
if future.done():
let res = future.read()
if res.isErr():
return RestApiResponse.jsonError(Http400,
AggregateAndProofValidationError,
$res.error())
else:
return RestApiResponse.jsonError(Http500,
"Unexpected server failure, while sending aggregate and proof")
return RestApiResponse.jsonMsgResponse(AggregateAndProofValidationSuccess)
# https://ethereum.github.io/beacon-APIs/#/Validator/prepareBeaconCommitteeSubnet
router.api(MethodPost,
"/eth/v1/validator/beacon_committee_subscriptions") do (
contentBody: Option[ContentBody]) -> RestApiResponse:
let requests =
block:
if contentBody.isNone():
return RestApiResponse.jsonError(Http400, EmptyRequestBodyError)
let dres = decodeBody(seq[RestCommitteeSubscription],
contentBody.get())
if dres.isErr():
return RestApiResponse.jsonError(Http400,
InvalidSubscriptionRequestValueError,
$dres.error())
dres.get()
if not(node.isSynced(node.dag.head)):
return RestApiResponse.jsonError(Http503, BeaconNodeInSyncError)
let
wallSlot = node.beaconClock.now.slotOrZero
wallEpoch = wallSlot.epoch
head = node.dag.head
var currentEpoch, nextEpoch: Option[EpochRef]
template getAndCacheEpochRef(epochRefVar: var Option[EpochRef],
epoch: Epoch): EpochRef =
if epochRefVar.isNone:
epochRefVar = block:
let epochRef = node.dag.getEpochRef(head, epoch, true)
if isErr(epochRef):
return RestApiResponse.jsonError(Http400, PrunedStateError)
some epochRef.get()
epochRefVar.get
for request in requests:
if uint64(request.committee_index) >= uint64(MAX_COMMITTEES_PER_SLOT):
return RestApiResponse.jsonError(Http400,
InvalidCommitteeIndexValueError)
if uint64(request.validator_index) >=
lenu64(getStateField(node.dag.headState, validators)):
return RestApiResponse.jsonError(Http400,
InvalidValidatorIndexValueError)
if wallSlot > request.slot + 1:
return RestApiResponse.jsonError(Http400, SlotFromThePastError)
let epoch = request.slot.epoch
let epochRef = if epoch == wallEpoch:
currentEpoch.getAndCacheEpochRef(wallEpoch)
elif epoch == wallEpoch + 1:
nextEpoch.getAndCacheEpochRef(wallEpoch + 1)
else:
return RestApiResponse.jsonError(Http400,
SlotNotInNextWallSlotEpochError)
let subnet_id = compute_subnet_for_attestation(
get_committee_count_per_slot(epochRef), request.slot,
request.committee_index)
node.registerDuty(
request.slot, subnet_id, request.validator_index,
request.is_aggregator)
let validator_pubkey = getStateField(
node.dag.headState, validators).asSeq()[request.validator_index].pubkey
node.validatorMonitor[].addAutoMonitor(
validator_pubkey, ValidatorIndex(request.validator_index))
return RestApiResponse.jsonMsgResponse(BeaconCommitteeSubscriptionSuccess)
# https://ethereum.github.io/beacon-APIs/#/Validator/prepareSyncCommitteeSubnets
router.api(MethodPost,
"/eth/v1/validator/sync_committee_subscriptions") do (
contentBody: Option[ContentBody]) -> RestApiResponse:
let subscriptions =
block:
if contentBody.isNone():
return RestApiResponse.jsonError(Http400, EmptyRequestBodyError)
let dres = decodeBody(seq[RestSyncCommitteeSubscription],
contentBody.get())
if dres.isErr():
return RestApiResponse.jsonError(Http400,
InvalidSyncCommitteeSubscriptionRequestError)
let subs = dres.get()
for item in subs:
if item.until_epoch > MaxEpoch:
return RestApiResponse.jsonError(Http400, EpochOverflowValueError)
if item.until_epoch < node.dag.cfg.ALTAIR_FORK_EPOCH:
return RestApiResponse.jsonError(Http400,
EpochFromTheIncorrectForkError)
if uint64(item.validator_index) >=
lenu64(getStateField(node.dag.headState, validators)):
return RestApiResponse.jsonError(Http400,
InvalidValidatorIndexValueError)
let validator_pubkey = getStateField(
node.dag.headState, validators).asSeq()[item.validator_index].pubkey
node.syncCommitteeMsgPool.syncCommitteeSubscriptions[validator_pubkey] =
item.until_epoch
node.validatorMonitor[].addAutoMonitor(
validator_pubkey, ValidatorIndex(item.validator_index))
subs
# TODO because we subscribe to all sync committee subnets, we don not need
# to remember which ones are requested by validator clients
return RestApiResponse.jsonMsgResponse(SyncCommitteeSubscriptionSuccess)
# https://ethereum.github.io/beacon-APIs/#/Validator/produceSyncCommitteeContribution
router.api(MethodGet,
"/eth/v1/validator/sync_committee_contribution") do (
slot: Option[Slot], subcommittee_index: Option[SyncSubCommitteeIndex],
beacon_block_root: Option[Eth2Digest]) -> RestApiResponse:
let qslot =
if slot.isNone():
return RestApiResponse.jsonError(Http400, MissingSlotValueError)
else:
let res = slot.get()
if res.isErr():
return RestApiResponse.jsonError(Http400, InvalidSlotValueError,
$res.error())
let rslot = res.get()
if epoch(rslot) < node.dag.cfg.ALTAIR_FORK_EPOCH:
return RestApiResponse.jsonError(Http400,
SlotFromTheIncorrectForkError)
rslot
let qindex =
if subcommittee_index.isNone():
return RestApiResponse.jsonError(Http400,
MissingSubCommitteeIndexValueError)
else:
let res = subcommittee_index.get()
if res.isErr():
return RestApiResponse.jsonError(Http400,
InvalidSubCommitteeIndexValueError,
$res.error())
res.get()
let qroot =
if beacon_block_root.isNone():
return RestApiResponse.jsonError(Http400,
MissingBeaconBlockRootValueError)
else:
let res = beacon_block_root.get()
if res.isErr():
return RestApiResponse.jsonError(Http400,
InvalidBeaconBlockRootValueError,
$res.error())
res.get()
# Check if node is fully synced.
let sres = node.getCurrentHead(qslot)
if sres.isErr():
return RestApiResponse.jsonError(Http503, BeaconNodeInSyncError)
var contribution = SyncCommitteeContribution()
let res = node.syncCommitteeMsgPool[].produceContribution(
qslot, qroot, qindex, contribution)
if not(res):
return RestApiResponse.jsonError(Http400, ProduceContributionError)
return RestApiResponse.jsonResponse(contribution)
# https://ethereum.github.io/beacon-APIs/#/Validator/publishContributionAndProofs
router.api(MethodPost,
"/eth/v1/validator/contribution_and_proofs") do (
contentBody: Option[ContentBody]) -> RestApiResponse:
let proofs =
block:
if contentBody.isNone():
return RestApiResponse.jsonError(Http400, EmptyRequestBodyError)
let dres = decodeBody(seq[SignedContributionAndProof],
contentBody.get())
if dres.isErr():
return RestApiResponse.jsonError(Http400,
InvalidContributionAndProofMessageError)
dres.get()
let pending =
block:
var res: seq[Future[SendResult]]
for proof in proofs:
res.add(node.sendSyncCommitteeContribution(proof, true))
res
let failures =
block:
var res: seq[RestAttestationsFailure]
await allFutures(pending)
for index, future in pending.pairs():
if future.done():
let fres = future.read()
if fres.isErr():
let failure = RestAttestationsFailure(index: uint64(index),
message: $fres.error())
res.add(failure)
elif future.failed() or future.cancelled():
# This is unexpected failure, so we log the error message.
let exc = future.readError()
let failure = RestAttestationsFailure(index: uint64(index),
message: $exc.msg)
res.add(failure)
res
if len(failures) > 0:
return RestApiResponse.jsonErrorList(Http400,
ContributionAndProofValidationError,
failures)
else:
return RestApiResponse.jsonMsgResponse(
ContributionAndProofValidationSuccess
)
# Legacy URLS - Nimbus <= 1.5.5 used to expose the REST API with an additional
# `/api` path component
router.redirect(
MethodPost,
"/api/eth/v1/validator/duties/attester/{epoch}",
"/eth/v1/validator/duties/attester/{epoch}"
)
router.redirect(
MethodGet,
"/api/eth/v1/validator/duties/proposer/{epoch}",
"/eth/v1/validator/duties/proposer/{epoch}"
)
router.redirect(
MethodPost,
"/api/eth/v1/validator/duties/sync/{epoch}",
"/eth/v1/validator/duties/sync/{epoch}"
)
router.redirect(
MethodGet,
"/api/eth/v1/validator/blocks/{slot}",
"/eth/v1/validator/blocks/{slot}"
)
router.redirect(
MethodGet,
"/api/eth/v2/validator/blocks/{slot}",
"/eth/v2/validator/blocks/{slot}"
)
router.redirect(
MethodGet,
"/api/eth/v1/validator/attestation_data",
"/eth/v1/validator/attestation_data"
)
router.redirect(
MethodGet,
"/api/eth/v1/validator/aggregate_attestation",
"/eth/v1/validator/aggregate_attestation"
)
router.redirect(
MethodPost,
"/api/eth/v1/validator/aggregate_and_proofs",
"/eth/v1/validator/aggregate_and_proofs"
)
router.redirect(
MethodPost,
"/api/eth/v1/validator/beacon_committee_subscriptions",
"/eth/v1/validator/beacon_committee_subscriptions"
)
router.redirect(
MethodPost,
"/api/eth/v1/validator/sync_committee_subscriptions",
"/eth/v1/validator/sync_committee_subscriptions"
)
router.redirect(
MethodGet,
"/api/eth/v1/validator/sync_committee_contribution",
"/eth/v1/validator/sync_committee_contribution"
)
router.redirect(
MethodPost,
"/api/eth/v1/validator/contribution_and_proofs",
"/eth/v1/validator/contribution_and_proofs"
)
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