112 lines
4.4 KiB
Nim
112 lines
4.4 KiB
Nim
# beacon_chain
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# Copyright (c) 2018-2021 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: [Defect].}
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import
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std/[strutils, parseutils],
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stew/byteutils,
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../beacon_node, ../validators/validator_duties,
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../consensus_object_pools/[block_pools_types, blockchain_dag],
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../spec/datatypes/base,
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../spec/[forks, helpers],
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../spec/eth2_apis/[rpc_types, eth2_json_rpc_serialization]
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export forks, rpc_types, eth2_json_rpc_serialization, blockchain_dag
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template raiseNoAltairSupport*() =
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raise (ref ValueError)(msg:
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"The JSON-RPC interface does not support certain Altair operations due to changes in block structure - see https://nimbus.guide/rest-api.html for full altair support")
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template withStateForStateId*(stateId: string, body: untyped): untyped =
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let
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bsi = node.stateIdToBlockSlotId(stateId)
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template isState(state: ForkedHashedBeaconState): bool =
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state.matches_block_slot(bsi.bid.root, bsi.slot)
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if isState(node.dag.headState):
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withStateVars(node.dag.headState):
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var cache {.inject, used.}: StateCache
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body
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else:
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let rpcState = assignClone(node.dag.headState)
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node.dag.withUpdatedState(rpcState[], bsi) do:
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body
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do:
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raise (ref CatchableError)(msg: "Trying to access pruned state")
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proc parseRoot*(str: string): Eth2Digest {.raises: [Defect, ValueError].} =
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Eth2Digest(data: hexToByteArray[32](str))
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func checkEpochToSlotOverflow*(epoch: Epoch) {.raises: [Defect, ValueError].} =
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const maxEpoch = epoch(FAR_FUTURE_SLOT)
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if epoch >= maxEpoch:
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raise newException(
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ValueError, "Requesting epoch for which slot would overflow")
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proc doChecksAndGetCurrentHead*(node: BeaconNode, slot: Slot): BlockRef {.raises: [Defect, CatchableError].} =
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result = node.dag.head
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if not node.isSynced(result):
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raise newException(CatchableError, "Cannot fulfill request until node is synced")
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# TODO for now we limit the requests arbitrarily by up to 2 epochs into the future
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if result.slot + uint64(2 * SLOTS_PER_EPOCH) < slot:
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raise newException(CatchableError, "Requesting way ahead of the current head")
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proc doChecksAndGetCurrentHead*(node: BeaconNode, epoch: Epoch): BlockRef {.raises: [Defect, CatchableError].} =
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checkEpochToSlotOverflow(epoch)
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node.doChecksAndGetCurrentHead(epoch.start_slot())
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proc parseSlot(slot: string): Slot {.raises: [Defect, CatchableError].} =
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if slot.len == 0:
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raise newException(ValueError, "Empty slot number not allowed")
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var parsed: BiggestUInt
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if parseBiggestUInt(slot, parsed) != slot.len:
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raise newException(ValueError, "Not a valid slot number")
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Slot parsed
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proc getBlockSlotIdFromString*(node: BeaconNode, slot: string): BlockSlotId {.raises: [Defect, CatchableError].} =
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let parsed = parseSlot(slot)
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discard node.doChecksAndGetCurrentHead(parsed)
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node.dag.getBlockIdAtSlot(parsed).valueOr:
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raise newException(ValueError, "Block not found")
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proc getBlockIdFromString*(node: BeaconNode, slot: string): BlockId {.raises: [Defect, CatchableError].} =
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let parsed = parseSlot(slot)
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discard node.doChecksAndGetCurrentHead(parsed)
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let bsid = node.dag.getBlockIdAtSlot(parsed)
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if bsid.isSome and bsid.get.isProposed():
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bsid.get().bid
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else:
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raise (ref ValueError)(msg: "Block not found")
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proc stateIdToBlockSlotId*(node: BeaconNode, stateId: string): BlockSlotId {.raises: [Defect, CatchableError].} =
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case stateId:
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of "head":
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node.dag.head.bid.atSlot()
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of "genesis":
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node.dag.genesis.atSlot()
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of "finalized":
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node.dag.finalizedHead.toBlockSlotId().expect("not nil")
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of "justified":
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node.dag.head.atEpochStart(
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getStateField(
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node.dag.headState, current_justified_checkpoint).epoch).
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toBlockSlotId().valueOr:
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raise (ref ValueError)(msg: "State not found")
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else:
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if stateId.startsWith("0x"):
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let stateRoot = parseRoot(stateId)
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if stateRoot == getStateRoot(node.dag.headState):
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node.dag.head.bid.atSlot()
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else:
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# We don't have a state root -> BlockSlot mapping
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raise (ref ValueError)(msg: "State not found")
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else: # Parse as slot number
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node.getBlockSlotIdFromString(stateId)
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