121 lines
4.2 KiB
Nim
121 lines
4.2 KiB
Nim
# beacon_chain
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# Copyright (c) 2018 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 http://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at http://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_crosslinks (state_transition_epoch.nim)
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# https://github.com/ethereum/eth2.0-specs/blob/v0.8.2/specs/core/0_beacon-chain.md#crosslinks
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# ---------------------------------------------------------------
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import
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# Standard library
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unittest,
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# Specs
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../../beacon_chain/spec/[beaconstate, datatypes, validator, helpers, state_transition_epoch],
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# Internals
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# Mock helpers
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../mocking/[mock_genesis, mock_attestations, mock_state, mock_blocks],
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./epoch_utils,
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../testutil
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suite "[Unit - Spec - Epoch processing] Crosslinks " & 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 genesisState.validators.len == int NumValidators
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var state: BeaconState
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template resetState: untyped =
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deepCopy(state, genesisState)
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test "No attestations":
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resetState()
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transitionEpochUntilCrosslinks(state)
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for shard in 0 ..< SHARD_COUNT:
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check state.previous_crosslinks[shard] == state.current_crosslinks[shard]
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test "Single crosslink update from current epoch":
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resetState()
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nextEpoch(state)
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var attestation = mockAttestation(state)
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fillAggregateAttestation(state, attestation)
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state.add(attestation, state.slot + MIN_ATTESTATION_INCLUSION_DELAY)
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# TODO: all attestations are duplicated at the moment
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# pending fix of https://github.com/status-im/nim-beacon-chain/issues/361
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check: state.current_epoch_attestations.len == 2
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# For sanity checks
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let shard = attestation.data.crosslink.shard
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let pre_crosslink = state.current_crosslinks[shard]
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transitionEpochUntilCrosslinks(state)
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check:
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state.previous_crosslinks[shard] != state.current_crosslinks[shard]
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pre_crosslink != state.current_crosslinks[shard]
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test "Double late crosslink":
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resetState()
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if get_committee_count(state, get_current_epoch(state)) < SHARD_COUNT:
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echo " [Warning] Skipping Double-late crosslink test: Committee.len < SHARD_COUNT for preset " & const_preset
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else:
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nextEpoch(state)
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state.slot += 4
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var attestation_1 = mockAttestation(state)
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fillAggregateAttestation(state, attestation_1)
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# Add attestation_1 to next epoch
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nextEpoch(state)
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state.add(attestation_1, state.slot + 1)
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var attestation_2: Attestation
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for _ in 0 ..< SLOTS_PER_EPOCH:
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attestation_2 = mockAttestation(state)
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if attestation_2.data.crosslink.shard == attestation_1.data.crosslink.shard:
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signMockAttestation(state, attestation_2)
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break
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nextSlot(state)
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applyEmptyBlock(state)
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fillAggregateAttestation(state, attestation_2)
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# Add attestation_2 in the next epoch after attestation_1 has already
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# updated the relevant crosslink
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nextEpoch(state)
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state.add(attestation_2, state.slot + 1)
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# TODO: all attestations are duplicated at the moment
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# pending fix of https://github.com/status-im/nim-beacon-chain/issues/361
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check: state.previous_epoch_attestations.len == 2
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check: state.current_epoch_attestations.len == 0
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var cache = get_empty_per_epoch_cache()
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let crosslink_deltas = get_crosslink_deltas(state, cache)
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transitionEpochUntilCrosslinks(state)
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let shard = attestation_2.data.crosslink.shard
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# ensure that the current crosslinks were not updated by the second attestation
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check: state.previous_crosslinks[shard] == state.current_crosslinks[shard]
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# ensure no reward, only penalties for the failed crosslink
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for index in get_crosslink_committee(
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state,
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attestation_2.data.target.epoch,
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attestation_2.data.crosslink.shard,
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cache
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):
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check:
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crosslink_deltas[0][index] == 0.Gwei
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crosslink_deltas[1][index] > 0.Gwei
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