92 lines
3.2 KiB
Nim
92 lines
3.2 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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# process_attestation (beaconstate.nim)
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# https://github.com/ethereum/consensus-specs/blob/v1.1.6/specs/phase0/beacon-chain.md#attestations
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# ---------------------------------------------------------------
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{.used.}
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import
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stew/results,
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# Specs
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../../beacon_chain/spec/[beaconstate, forks, helpers],
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../../beacon_chain/spec/datatypes/base,
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# Mock helpers
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../mocking/[mock_genesis, mock_attestations, mock_state],
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../testutil
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suite "[Unit - Spec - Block processing] Attestations " & preset():
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const NumValidators = uint64(8) * SLOTS_PER_EPOCH
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let genesisState = initGenesisState(NumValidators)
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doAssert getStateField(genesisState[], validators).lenu64 == NumValidators
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template valid_attestation(name: string, body: untyped): untyped {.dirty.}=
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# Process a valid attestation
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#
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# The BeaconState is exposed as "state" in the calling context
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# The attestation to process must be named "attestation" in the calling context
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test name:
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var state {.inject.} = newClone(genesisState[])
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# Attestation setup body
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# ----------------------------------------
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body
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# Params for sanity checks
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# ----------------------------------------
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let
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current_epoch_count =
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state.phase0Data.data.current_epoch_attestations.len
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previous_epoch_count =
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state.phase0Data.data.previous_epoch_attestations.len
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# State transition
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# ----------------------------------------
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var cache = StateCache()
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check process_attestation(
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state.phase0Data.data, attestation, flags = {}, 0.Gwei, cache
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).isOk
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# Check that the attestation was processed
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if attestation.data.target.epoch == get_current_epoch(state[]):
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check(state.phase0Data.data.current_epoch_attestations.len ==
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current_epoch_count + 1)
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else:
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check(state.phase0Data.data.previous_epoch_attestations.len ==
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previous_epoch_count + 1)
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valid_attestation("Valid attestation"):
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let attestation = mockAttestation(state.phase0Data.data)
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getStateField(state[], slot) += MIN_ATTESTATION_INCLUSION_DELAY
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valid_attestation("Valid attestation from previous epoch"):
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nextSlot(state[])
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let attestation = mockAttestation(state.phase0Data.data)
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getStateField(state[], slot) = Slot(SLOTS_PER_EPOCH - 1)
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nextEpoch(state[])
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# TODO - invalid attestations
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# - Empty aggregation bit
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# - Wrong end epoch
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# - Invalid signature
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# - Before inclusion delay
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# - past last inclusion slot
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# - before oldest known source epoch
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# - wrong shard
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# - invalid shard
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# - target epoch too old
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# - target epoch too far in the future
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# - source epoch in the future
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# - invalid current source root
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# - bad source root
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# - inconsistent custody bits length
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# - non-empty custody bits in phase 0
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