def test_get_seed(genesis_state,
committee_config,
slots_per_epoch,
min_seed_lookahead,
activation_exit_delay,
epochs_per_historical_vector):
def mock_get_randao_mix(state,
epoch,
epochs_per_historical_vector):
return hash_eth2(
state.hash_tree_root +
epoch.to_bytes(32, byteorder='little') +
epochs_per_historical_vector.to_bytes(32, byteorder='little')
)
def mock_get_active_index_root(state,
epoch,
epochs_per_historical_vector):
return hash_eth2(
state.hash_tree_root +
epoch.to_bytes(32, byteorder='little') +
slots_per_epoch.to_bytes(32, byteorder='little') +
epochs_per_historical_vector.to_bytes(32, byteorder='little')
)
state = genesis_state
epoch = 1
state = state.copy(
slot=compute_start_slot_of_epoch(epoch, committee_config.SLOTS_PER_EPOCH),
)
epoch_as_bytes = epoch.to_bytes(32, 'little')
seed = _get_seed(
state=state,
epoch=epoch,
randao_provider=mock_get_randao_mix,
active_index_root_provider=mock_get_active_index_root,
epoch_provider=lambda *_: epoch_as_bytes,
committee_config=committee_config,
)
assert seed == hash_eth2(
mock_get_randao_mix(
state=state,
epoch=(epoch + epochs_per_historical_vector - min_seed_lookahead - 1),
epochs_per_historical_vector=epochs_per_historical_vector,
) + mock_get_active_index_root(
state=state,
epoch=epoch,
epochs_per_historical_vector=epochs_per_historical_vector,
) + epoch_as_bytes
)
def test_get_seed(
genesis_state,
config,
slots_per_epoch,
min_seed_lookahead,
max_seed_lookahead,
epochs_per_historical_vector,
):
def mock_get_randao_mix(state, epoch, epochs_per_historical_vector):
return hash_eth2(
state.hash_tree_root
+ epoch.to_bytes(32, byteorder="little")
+ epochs_per_historical_vector.to_bytes(32, byteorder="little")
)
state = genesis_state
epoch = 1
state = state.set(
"slot", compute_start_slot_at_epoch(epoch, config.SLOTS_PER_EPOCH)
)
epoch_as_bytes = epoch.to_bytes(32, "little")
domain_type = signature_domain_to_domain_type(
SignatureDomain.DOMAIN_BEACON_PROPOSER
)
seed = _get_seed(
state=state,
epoch=epoch,
domain_type=domain_type,
randao_provider=mock_get_randao_mix,
epoch_provider=lambda *_: epoch_as_bytes,
config=config,
)
assert seed == hash_eth2(
domain_type
+ epoch_as_bytes
+ mock_get_randao_mix(
state=state,
epoch=(epoch + epochs_per_historical_vector - min_seed_lookahead - 1),
epochs_per_historical_vector=epochs_per_historical_vector,
)
)