68 lines
2.1 KiB
Nim
68 lines
2.1 KiB
Nim
import
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deques,
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spec/[datatypes, crypto]
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type
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Attestation* = object
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validator*: int
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data*: AttestationSignedData
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signature*: ValidatorSig
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AttestationPool* = object
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attestations: Deque[seq[Attestation]]
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startingSlot: int
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proc init*(T: type AttestationPool, startingSlot: int): T =
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result.attestationsPerSlot = initDeque[seq[Attestation]]()
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result.startingSlot = startingSlot
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proc setLen*[T](d: var Deque[T], len: int) =
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# TODO: The upstream `Deque` type should gain a proper resize API
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let delta = len - d.len
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if delta > 0:
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for i in 0 ..< delta:
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var defaultVal: T
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d.addLast(defaultVal)
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else:
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d.shrink(fromLast = delta)
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proc add*(pool: var AttestationPool,
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attestation: Attestation,
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beaconState: BeaconState) =
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# The caller of this function is responsible for ensuring that
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# the attestations will be given in a strictly slot increasing order:
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doAssert attestation.data.slot.int >= pool.startingSlot
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let slotIdxInPool = attestation.data.slot.int - pool.startingSlot
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if slotIdxInPool >= pool.attestations.len:
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pool.attestations.setLen(slotIdxInPool + 1)
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pool.attestations[slotIdxInPool].add attestation
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iterator each*(pool: AttestationPool,
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firstSlot, lastSlot: int): Attestation =
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## Both indices are treated inclusively
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## TODO: this should return a lent value
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doAssert firstSlot <= lastSlot
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for idx in countup(max(0, firstSlot - pool.startingSlot),
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min(pool.attestations.len - 1, lastSlot - pool.startingSlot)):
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for attestation in pool.attestations[idx]:
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yield attestation
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proc discardHistoryToSlot*(pool: var AttestationPool, slot: int) =
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## The index is treated inclusively
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let slotIdx = slot - pool.startingSlot
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if slotIdx < 0: return
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pool.attestations.shrink(fromFirst = slotIdx + 1)
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proc getLatestAttestation*(pool: AttestationPool, validator: ValidatorRecord) =
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discard
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proc getLatestAttestationTarget*() =
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discard
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proc forkChoice*(pool: AttestationPool, oldHead, newBlock: BeaconBlock): bool =
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# This will return true if the new block is accepted over the old head block
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discard
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