nimbus-eth2/beacon_chain/validator_api.nim

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# beacon_chain
# Copyright (c) 2018-2020 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
# Standard library
tables, strutils, parseutils, sequtils,
# Nimble packages
stew/[byteutils, objects],
chronos, metrics, json_rpc/[rpcserver, jsonmarshal],
chronicles,
# Local modules
spec/[datatypes, digest, crypto, validator, helpers],
block_pools/[chain_dag, spec_cache], ssz/merkleization,
beacon_node_common, beacon_node_types, attestation_pool,
validator_duties, eth2_network,
spec/eth2_apis/callsigs_types,
eth2_json_rpc_serialization
type
RpcServer* = RpcHttpServer
logScope: topics = "valapi"
proc toBlockSlot(blckRef: BlockRef): BlockSlot =
blckRef.atSlot(blckRef.slot)
proc parseRoot(str: string): Eth2Digest =
return Eth2Digest(data: hexToByteArray[32](str))
proc parsePubkey(str: string): ValidatorPubKey =
let pubkeyRes = fromHex(ValidatorPubKey, str)
if pubkeyRes.isErr:
raise newException(CatchableError, "Not a valid public key")
return pubkeyRes[]
proc doChecksAndGetCurrentHead(node: BeaconNode, slot: Slot): BlockRef =
result = node.chainDag.head
if not node.isSynced(result):
raise newException(CatchableError, "Cannot fulfill request until node is synced")
# TODO for now we limit the requests arbitrarily by up to 2 epochs into the future
if result.slot + uint64(2 * SLOTS_PER_EPOCH) < slot:
raise newException(CatchableError, "Requesting way ahead of the current head")
proc doChecksAndGetCurrentHead(node: BeaconNode, epoch: Epoch): BlockRef =
node.doChecksAndGetCurrentHead(epoch.compute_start_slot_at_epoch)
# TODO currently this function throws if the validator isn't found - is this OK?
proc getValidatorInfoFromValidatorId(
state: BeaconState,
current_epoch: Epoch,
validatorId: string,
status = ""):
Option[BeaconStatesValidatorsTuple] =
const allowedStatuses = ["", "pending", "pending_initialized", "pending_queued",
"active", "active_ongoing", "active_exiting", "active_slashed", "exited",
"exited_unslashed", "exited_slashed", "withdrawal", "withdrawal_possible",
"withdrawal_done"]
if status notin allowedStatuses:
raise newException(CatchableError, "Invalid status requested")
let validator = if validatorId.startsWith("0x"):
let pubkey = parsePubkey(validatorId)
let idx = state.validators.asSeq.findIt(it.pubKey == pubkey)
if idx == -1:
raise newException(CatchableError, "Could not find validator")
state.validators[idx]
else:
var valIdx: BiggestUInt
if parseBiggestUInt(validatorId, valIdx) != validatorId.len:
raise newException(CatchableError, "Not a valid index")
if state.validators.lenu64 >= valIdx:
raise newException(CatchableError, "Index out of bounds")
state.validators[valIdx]
# time to determine the status of the validator - the code mimics
# whatever is detailed here: https://hackmd.io/ofFJ5gOmQpu1jjHilHbdQQ
let actual_status = if validator.activation_epoch > current_epoch:
# pending
if validator.activation_eligibility_epoch == FAR_FUTURE_EPOCH:
"pending_initialized"
else:
# validator.activation_eligibility_epoch < FAR_FUTURE_EPOCH:
"pending_queued"
elif validator.activation_epoch <= current_epoch and
current_epoch < validator.exit_epoch:
# active
if validator.exit_epoch == FAR_FUTURE_EPOCH:
"active_ongoing"
elif not validator.slashed:
# validator.exit_epoch < FAR_FUTURE_EPOCH
"active_exiting"
else:
# validator.exit_epoch < FAR_FUTURE_EPOCH and validator.slashed:
"active_slashed"
elif validator.exit_epoch <= current_epoch and
current_epoch < validator.withdrawable_epoch:
# exited
if not validator.slashed:
"exited_unslashed"
else:
# validator.slashed
"exited_slashed"
elif validator.withdrawable_epoch <= current_epoch:
# withdrawal
if validator.effective_balance != 0:
"withdrawal_possible"
else:
# validator.effective_balance == 0
"withdrawal_done"
else:
raise newException(CatchableError, "Invalid validator status")
# if the requested status doesn't match the actual status
if status != "" and status notin actual_status:
return none(BeaconStatesValidatorsTuple)
return some((validator: validator, status: actual_status,
balance: validator.effective_balance))
proc getBlockSlotFromString(node: BeaconNode, slot: string): BlockSlot =
var parsed: BiggestUInt
if parseBiggestUInt(slot, parsed) != slot.len:
raise newException(CatchableError, "Not a valid slot number")
let head = node.doChecksAndGetCurrentHead(parsed.Slot)
return head.atSlot(parsed.Slot)
proc getBlockDataFromBlockId(node: BeaconNode, blockId: string): BlockData =
result = case blockId:
of "head":
node.chainDag.get(node.chainDag.head)
of "genesis":
node.chainDag.get(node.chainDag.tail)
of "finalized":
node.chainDag.get(node.chainDag.finalizedHead.blck)
else:
if blockId.startsWith("0x"):
let blckRoot = parseRoot(blockId)
let blockData = node.chainDag.get(blckRoot)
if blockData.isNone:
raise newException(CatchableError, "Block not found")
blockData.get()
else:
let blockSlot = node.getBlockSlotFromString(blockId)
if blockSlot.blck.isNil:
raise newException(CatchableError, "Block not found")
node.chainDag.get(blockSlot.blck)
proc stateIdToBlockSlot(node: BeaconNode, stateId: string): BlockSlot =
result = case stateId:
of "head":
node.chainDag.head.toBlockSlot()
of "genesis":
node.chainDag.tail.toBlockSlot()
of "finalized":
node.chainDag.finalizedHead
of "justified":
node.chainDag.head.atEpochStart(
node.chainDag.headState.data.data.current_justified_checkpoint.epoch)
else:
if stateId.startsWith("0x"):
let blckRoot = parseRoot(stateId)
let blckRef = node.chainDag.getRef(blckRoot)
if blckRef.isNil:
raise newException(CatchableError, "Block not found")
blckRef.toBlockSlot()
else:
node.getBlockSlotFromString(stateId)
# TODO Probably the `beacon` ones should be defined elsewhere...?
proc installValidatorApiHandlers*(rpcServer: RpcServer, node: BeaconNode) =
let GENESIS_FORK_VERSION = node.config.runtimePreset.GENESIS_FORK_VERSION
template withStateForStateId(stateId: string, body: untyped): untyped =
# TODO this can be optimized for the "head" case since that should be most common
node.chainDag.withState(node.chainDag.tmpState,
node.stateIdToBlockSlot(stateId)):
body
rpcServer.rpc("get_v1_beacon_genesis") do () -> BeaconGenesisTuple:
return (genesis_time: node.chainDag.headState.data.data.genesis_time,
genesis_validators_root:
node.chainDag.headState.data.data.genesis_validators_root,
genesis_fork_version: GENESIS_FORK_VERSION)
rpcServer.rpc("get_v1_beacon_states_root") do (stateId: string) -> Eth2Digest:
withStateForStateId(stateId):
return hashedState.root
rpcServer.rpc("get_v1_beacon_states_fork") do (stateId: string) -> Fork:
withStateForStateId(stateId):
return state.fork
rpcServer.rpc("get_v1_beacon_states_finality_checkpoints") do (
stateId: string) -> BeaconStatesFinalityCheckpointsTuple:
withStateForStateId(stateId):
return (previous_justified: state.previous_justified_checkpoint,
current_justified: state.current_justified_checkpoint,
finalized: state.finalized_checkpoint)
rpcServer.rpc("get_v1_beacon_states_stateId_validators") do (
stateId: string, validatorIds: seq[string],
status: string) -> seq[BeaconStatesValidatorsTuple]:
let current_epoch = get_current_epoch(node.chainDag.headState.data.data)
withStateForStateId(stateId):
for validatorId in validatorIds:
let res = state.getValidatorInfoFromValidatorId(
current_epoch, validatorId, status)
if res.isSome():
result.add(res.get())
rpcServer.rpc("get_v1_beacon_states_stateId_validators_validatorId") do (
stateId: string, validatorId: string) -> BeaconStatesValidatorsTuple:
let current_epoch = get_current_epoch(node.chainDag.headState.data.data)
withStateForStateId(stateId):
let res = state.getValidatorInfoFromValidatorId(current_epoch, validatorId)
if res.isNone:
# TODO should we raise here? Maybe this is different from the array case...
raise newException(CatchableError, "Validator status differs")
return res.get()
rpcServer.rpc("get_v1_beacon_states_stateId_committees_epoch") do (
stateId: string, epoch: uint64, index: uint64, slot: uint64) ->
seq[BeaconStatesCommitteesTuple]:
withStateForStateId(stateId):
proc getCommittee(slot: Slot, index: CommitteeIndex): BeaconStatesCommitteesTuple =
let vals = get_beacon_committee(state, slot, index, cache).mapIt(it.uint64)
return (index: index.uint64, slot: slot.uint64, validators: vals)
proc forSlot(slot: Slot, res: var seq[BeaconStatesCommitteesTuple]) =
if index == 0: # TODO this means if the parameter is missing (its optional)
let committees_per_slot =
get_committee_count_per_slot(state, slot.epoch, cache)
for committee_index in 0'u64..<committees_per_slot:
res.add(getCommittee(slot, committee_index.CommitteeIndex))
else:
res.add(getCommittee(slot, index.CommitteeIndex))
if slot == 0: # TODO this means if the parameter is missing (its optional)
for i in 0 ..< SLOTS_PER_EPOCH:
forSlot(compute_start_slot_at_epoch(epoch.Epoch) + i, result)
else:
forSlot(slot.Slot, result)
rpcServer.rpc("get_v1_beacon_headers") do (
slot: uint64, parent_root: Eth2Digest) -> seq[BeaconHeadersTuple]:
# @mratsim: I'm adding a toposorted iterator that returns all blocks from last finalization to all heads in the dual fork choice PR @viktor
# filterIt(dag.blocks.values(), it.blck.slot == slot_of_interest)
# maybe usesBlockPool.heads ??? or getBlockRange ???
# https://discordapp.com/channels/613988663034118151/614014714590134292/726095138484518912
discard # raise newException(CatchableError, "Not implemented") # cannot compile...
rpcServer.rpc("get_v1_beacon_headers_blockId") do (
blockId: string) -> tuple[canonical: bool, header: SignedBeaconBlockHeader]:
let bd = node.getBlockDataFromBlockId(blockId)
let tsbb = bd.data
result.header.signature.blob = tsbb.signature.data
result.header.message.slot = tsbb.message.slot
result.header.message.proposer_index = tsbb.message.proposer_index
result.header.message.parent_root = tsbb.message.parent_root
result.header.message.state_root = tsbb.message.state_root
result.header.message.body_root = tsbb.message.body.hash_tree_root()
result.canonical = bd.refs.isAncestorOf(node.chainDag.head)
rpcServer.rpc("get_v1_beacon_blocks_blockId") do (
blockId: string) -> TrustedSignedBeaconBlock:
return node.getBlockDataFromBlockId(blockId).data
rpcServer.rpc("get_v1_beacon_blocks_blockId_root") do (
blockId: string) -> Eth2Digest:
return node.getBlockDataFromBlockId(blockId).data.message.state_root
rpcServer.rpc("get_v1_beacon_blocks_blockId_attestations") do (
blockId: string) -> seq[TrustedAttestation]:
return node.getBlockDataFromBlockId(blockId).data.message.body.attestations.asSeq
rpcServer.rpc("post_v1_beacon_pool_attestations") do (
attestation: Attestation) -> bool:
node.sendAttestation(attestation)
return true
rpcServer.rpc("get_v1_config_fork_schedule") do (
) -> seq[tuple[epoch: uint64, version: Version]]:
discard # raise newException(CatchableError, "Not implemented") # cannot compile...
rpcServer.rpc("get_v1_debug_beacon_states_stateId") do (
stateId: string) -> BeaconState:
withStateForStateId(stateId):
return state
rpcServer.rpc("get_v1_validator_block") do (
slot: Slot, graffiti: GraffitiBytes, randao_reveal: ValidatorSig) -> BeaconBlock:
debug "get_v1_validator_block", slot = slot
let head = node.doChecksAndGetCurrentHead(slot)
let proposer = node.chainDag.getProposer(head, slot)
if proposer.isNone():
raise newException(CatchableError, "could not retrieve block for slot: " & $slot)
let valInfo = ValidatorInfoForMakeBeaconBlock(kind: viRandao_reveal,
randao_reveal: randao_reveal)
let res = await makeBeaconBlockForHeadAndSlot(
node, valInfo, proposer.get()[0], graffiti, head, slot)
if res.message.isNone():
raise newException(CatchableError, "could not retrieve block for slot: " & $slot)
return res.message.get()
rpcServer.rpc("post_v1_validator_block") do (body: SignedBeaconBlock) -> bool:
debug "post_v1_validator_block",
slot = body.message.slot,
prop_idx = body.message.proposer_index
let head = node.doChecksAndGetCurrentHead(body.message.slot)
if head.slot >= body.message.slot:
raise newException(CatchableError,
"Proposal is for a past slot: " & $body.message.slot)
if head == await proposeSignedBlock(node, head, AttachedValidator(), body):
raise newException(CatchableError, "Could not propose block")
return true
rpcServer.rpc("get_v1_validator_attestation") do (
slot: Slot, committee_index: CommitteeIndex) -> AttestationData:
debug "get_v1_validator_attestation", slot = slot
let
head = node.doChecksAndGetCurrentHead(slot)
epochRef = node.chainDag.getEpochRef(head, slot.epoch)
return makeAttestationData(epochRef, head.atSlot(slot), committee_index.uint64)
rpcServer.rpc("get_v1_validator_aggregate_attestation") do (
slot: Slot, attestation_data_root: Eth2Digest)-> Attestation:
debug "get_v1_validator_aggregate_attestation"
let res = node.attestationPool[].getAggregatedAttestation(slot, attestation_data_root)
if res.isSome:
return res.get
raise newException(CatchableError, "Could not retrieve an aggregated attestation")
rpcServer.rpc("post_v1_validator_aggregate_and_proofs") do (
payload: SignedAggregateAndProof) -> bool:
debug "post_v1_validator_aggregate_and_proofs"
node.network.broadcast(node.topicAggregateAndProofs, payload)
notice "Aggregated attestation sent",
attestation = shortLog(payload.message.aggregate)
rpcServer.rpc("get_v1_validator_duties_attester") do (
epoch: Epoch, public_keys: seq[ValidatorPubKey]) -> seq[AttesterDuties]:
debug "get_v1_validator_duties_attester", epoch = epoch
let
head = node.doChecksAndGetCurrentHead(epoch)
epochRef = node.chainDag.getEpochRef(head, epoch)
committees_per_slot = get_committee_count_per_slot(epochRef)
for i in 0 ..< SLOTS_PER_EPOCH:
let slot = compute_start_slot_at_epoch(epoch) + i
for committee_index in 0'u64..<committees_per_slot:
let committee = get_beacon_committee(
epochRef, slot, committee_index.CommitteeIndex)
for index_in_committee, validatorIdx in committee:
if validatorIdx < epochRef.validator_keys.len.ValidatorIndex:
let curr_val_pubkey = epochRef.validator_keys[validatorIdx].initPubKey
if public_keys.findIt(it == curr_val_pubkey) != -1:
result.add((public_key: curr_val_pubkey,
validator_index: validatorIdx,
committee_index: committee_index.CommitteeIndex,
committee_length: committee.lenu64,
validator_committee_index: index_in_committee.uint64,
slot: slot))
rpcServer.rpc("get_v1_validator_duties_proposer") do (
epoch: Epoch) -> seq[ValidatorPubkeySlotPair]:
debug "get_v1_validator_duties_proposer", epoch = epoch
let
head = node.doChecksAndGetCurrentHead(epoch)
epochRef = node.chainDag.getEpochRef(head, epoch)
for i in 0 ..< SLOTS_PER_EPOCH:
if epochRef.beacon_proposers[i].isSome():
result.add((public_key: epochRef.beacon_proposers[i].get()[1].initPubKey(),
slot: compute_start_slot_at_epoch(epoch) + i))
rpcServer.rpc("post_v1_validator_beacon_committee_subscriptions") do (
committee_index: CommitteeIndex, slot: Slot, aggregator: bool,
validator_pubkey: ValidatorPubKey, slot_signature: ValidatorSig) -> bool:
debug "post_v1_validator_beacon_committee_subscriptions"
raise newException(CatchableError, "Not implemented")