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update test to use fresh sync committees 

the way the test infra is built we end up with
two identical sync committees at epoch 0.
This commit is contained in:
Alex Stokes 2021-01-12 09:31:07 -08:00
parent 5001588285
commit e518c4d04d
1 changed files with 22 additions and 9 deletions
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31
tests/core/pyspec/eth2spec/test/lightclient_patch/block_processing/test_process_sync_committee.py
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@ -190,27 +190,40 @@ def test_invalid_signature_previous_committee(spec, state):
@with_all_phases_except([PHASE0, PHASE1])
@spec_state_test
def test_valid_signature_next_committee(spec, state):
def test_valid_signature_future_committee(spec, state):
# NOTE: the `state` provided is at genesis and the process to select
# sync committees currently returns the same committee for the first and second
# periods at genesis.
# To get a distinct committee so we can generate an "old" signature, we need to advance
# 2 EPOCHS_PER_SYNC_COMMITTEE_PERIOD periods.
current_epoch = spec.get_current_epoch(state)
next_committee = state.next_sync_committee
epoch_in_next_sync_committee_period = current_epoch + spec.EPOCHS_PER_SYNC_COMMITTEE_PERIOD
slot_in_next_sync_committee_period = epoch_in_next_sync_committee_period * spec.SLOTS_PER_EPOCH
transition_to(spec, state, slot_in_next_sync_committee_period)
old_current_sync_committee = state.current_sync_committee
old_next_sync_committee = state.next_sync_committee
assert state.current_sync_committee == next_committee
epoch_in_future_sync_committee_period = current_epoch + 2 * spec.EPOCHS_PER_SYNC_COMMITTEE_PERIOD
slot_in_future_sync_committee_period = epoch_in_future_sync_committee_period * spec.SLOTS_PER_EPOCH
transition_to(spec, state, slot_in_future_sync_committee_period)
sync_committee = state.current_sync_committee
expected_sync_committee = spec.get_sync_committee(state, epoch_in_future_sync_committee_period)
assert sync_committee == expected_sync_committee
assert sync_committee != old_current_sync_committee
assert sync_committee != old_next_sync_committee
pubkeys = [validator.pubkey for validator in state.validators]
committee = [pubkeys.index(pubkey) for pubkey in next_committee.pubkeys]
committee_indices = [pubkeys.index(pubkey) for pubkey in sync_committee.pubkeys]
yield 'pre', state
block = build_empty_block_for_next_slot(spec, state)
block.body.sync_committee_bits = [True] * len(committee)
block.body.sync_committee_bits = [True] * len(committee_indices)
block.body.sync_committee_signature = compute_aggregate_sync_committee_signature(
spec,
state,
block.slot - 1,
committee,
committee_indices,
)
signed_block = state_transition_and_sign_block(spec, state, block)