116 lines
3.3 KiB
Nim
116 lines
3.3 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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# Mocking attestations
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# ---------------------------------------------------------------
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import
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# Standard library
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intsets,
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# Status
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chronicles,
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# Specs
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../../beacon_chain/spec/[datatypes, beaconstate, helpers, validator, crypto,
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signatures, presets],
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# Internals
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../../beacon_chain/ssz,
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# Mocking procs
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./mock_blocks,
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./mock_validator_keys
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proc mockAttestationData(
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state: BeaconState,
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slot: Slot,
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index: uint64): AttestationData =
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doAssert state.slot >= slot
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if slot == state.slot:
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result.beacon_block_root = mockBlockForNextSlot(state).message.parent_root
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else:
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result.beacon_block_root = get_block_root_at_slot(state, slot)
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let current_epoch_start_slot = state.get_current_epoch().compute_start_slot_at_epoch()
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let epoch_boundary_root = block:
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if slot < current_epoch_start_slot:
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get_block_root(state, get_previous_epoch(state))
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elif slot == current_epoch_start_slot:
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result.beacon_block_root
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else:
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get_block_root(state, get_current_epoch(state))
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if slot < current_epoch_start_slot:
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result.source = state.previous_justified_checkpoint
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else:
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result.source = state.current_justified_checkpoint
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let target_epoch = compute_epoch_at_slot(slot)
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result.slot = slot
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result.index = index
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result.target = Checkpoint(
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epoch: target_epoch, root: epoch_boundary_root
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)
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proc signMockAttestation*(state: BeaconState, attestation: var Attestation) =
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var cache = StateCache()
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var agg {.noInit.}: AggregateSignature
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var first_iter = true # Can't do while loop on hashset
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for validator_index in get_attesting_indices(
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state,
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attestation.data,
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attestation.aggregation_bits,
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cache
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):
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let sig = get_attestation_signature(
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state.fork, state.genesis_validators_root, attestation.data,
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MockPrivKeys[validator_index]
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)
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if first_iter:
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agg.init(sig)
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first_iter = false
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else:
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agg.aggregate(sig)
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if first_iter != true:
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attestation.signature = agg.finish()
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# Otherwise no participants so zero sig
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proc mockAttestationImpl(
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state: BeaconState,
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slot: Slot): Attestation =
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var cache = StateCache()
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let
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beacon_committee = get_beacon_committee(
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state,
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result.data.slot,
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result.data.index.CommitteeIndex,
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cache
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)
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committee_size = beacon_committee.len
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result.data = mockAttestationData(state, slot, 0)
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result.aggregation_bits = init(CommitteeValidatorsBits, committee_size)
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# fillAggregateAttestation
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for i in 0 ..< beacon_committee.len:
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result.aggregation_bits[i] = true
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signMockAttestation(state, result)
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proc mockAttestation*(
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state: BeaconState): Attestation =
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mockAttestationImpl(state, state.slot)
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proc mockAttestation*(
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state: BeaconState,
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slot: Slot): Attestation =
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mockAttestationImpl(state, slot)
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