def _select_bls_backend(bls_setting: BLSSetting) -> None:
if bls_setting == BLSSetting.Disabled:
bls.use_noop_backend()
elif bls_setting == BLSSetting.Enabled:
bls.use(MilagroBackend)
elif bls_setting == BLSSetting.Optional:
# do not verify BLS to save time
bls.use_noop_backend()
def _select_bls_backend(bls_setting: BLSSetting) -> None:
if bls_setting == BLSSetting.DISABLED:
bls.use_noop_backend()
elif bls_setting == BLSSetting.ENABLED:
bls.use(MilagroBackend)
elif bls_setting == BLSSetting.OPTIONAL:
# do not verify BLS to save time
bls.use_noop_backend()
def execute_state_transtion(test_case, base_db):
bls.use_noop_backend()
dict_config = test_case['config']
verify_signatures = test_case['verify_signatures']
dict_initial_state = test_case['initial_state']
dict_blocks = test_case['blocks']
dict_expected_state = test_case['expected_state']
# TODO: make it case by case
assert verify_signatures is False
# Set config
config = generate_config_by_dict(dict_config)
# Set Vector fields
override_vector_lengths(config)
# Set pre_state
pre_state = from_formatted_dict(dict_initial_state, BeaconState)
# Set blocks
blocks = ()
for dict_block in dict_blocks:
block = from_formatted_dict(dict_block, SerenityBeaconBlock)
blocks += (block, )
sm_class = SerenityStateMachine.configure(
__name__='SerenityStateMachineForTesting',
config=config,
)
chaindb = BeaconChainDB(base_db, Eth2GenesisConfig(config))
attestation_pool = AttestationPool()
post_state = pre_state.copy()
for block in blocks:
sm = sm_class(chaindb, attestation_pool, None, post_state)
post_state, _ = sm.import_block(block)
# Use dict diff, easier to see the diff
dict_post_state = to_formatted_dict(post_state, BeaconState)
for key, value in dict_expected_state.items():
if isinstance(value, list):
value = tuple(value)
assert dict_post_state[key] == value
def test_demo(base_db, validator_count, keymap, pubkeys, fork_choice_scoring):
bls.use_noop_backend()
slots_per_epoch = 8
config = SERENITY_CONFIG._replace(
SLOTS_PER_EPOCH=slots_per_epoch,
GENESIS_EPOCH=slot_to_epoch(SERENITY_CONFIG.GENESIS_SLOT,
slots_per_epoch),
TARGET_COMMITTEE_SIZE=3,
SHARD_COUNT=2,
MIN_ATTESTATION_INCLUSION_DELAY=2,
)
override_vector_lengths(config)
fixture_sm_class = SerenityStateMachine.configure(
__name__='SerenityStateMachineForTesting',
config=config,
)
genesis_slot = config.GENESIS_SLOT
genesis_epoch = config.GENESIS_EPOCH
chaindb = BeaconChainDB(base_db, config)
attestation_pool = AttestationPool()
# TODO(ralexstokes) clean up how the cache is populated
for i in range(validator_count):
pubkeys[i]
genesis_state, genesis_block = create_mock_genesis(
num_validators=validator_count,
config=config,
keymap=keymap,
genesis_block_class=SerenityBeaconBlock,
)
for i in range(validator_count):
assert genesis_state.validators[i].is_active(genesis_slot)
chaindb.persist_block(genesis_block, SerenityBeaconBlock,
fork_choice_scoring)
chaindb.persist_state(genesis_state)
state = genesis_state
block = genesis_block
chain_length = 3 * config.SLOTS_PER_EPOCH
blocks = (block, )
attestations_map = {} # Dict[Slot, Sequence[Attestation]]
for current_slot in range(genesis_slot + 1,
genesis_slot + chain_length + 1):
if current_slot > genesis_slot + config.MIN_ATTESTATION_INCLUSION_DELAY:
attestations = attestations_map[
current_slot - config.MIN_ATTESTATION_INCLUSION_DELAY]
else:
attestations = ()
block = create_mock_block(
state=state,
config=config,
state_machine=fixture_sm_class(
chaindb,
attestation_pool,
blocks[-1].slot,
),
block_class=SerenityBeaconBlock,
parent_block=block,
keymap=keymap,
slot=current_slot,
attestations=attestations,
)
# Get state machine instance
sm = fixture_sm_class(
chaindb,
attestation_pool,
blocks[-1].slot,
)
state, _ = sm.import_block(block)
chaindb.persist_state(state)
chaindb.persist_block(block, SerenityBeaconBlock, fork_choice_scoring)
blocks += (block, )
# Mock attestations
attestation_slot = current_slot
attestations = create_mock_signed_attestations_at_slot(
state=state,
config=config,
state_machine=fixture_sm_class(
chaindb,
attestation_pool,
block.slot,
),
attestation_slot=attestation_slot,
beacon_block_root=block.signing_root,
keymap=keymap,
voted_attesters_ratio=1.0,
)
attestations_map[attestation_slot] = attestations
assert state.slot == chain_length + genesis_slot
# Justification assertions
assert state.current_justified_epoch == genesis_epoch
assert state.finalized_epoch == genesis_epoch
def test_demo(base_db, validator_count, keymap, pubkeys, fork_choice_scoring):
bls.use_noop_backend()
config = MINIMAL_SERENITY_CONFIG
override_lengths(config)
fixture_sm_class = SerenityStateMachine.configure(
__name__="SerenityStateMachineForTesting", config=config)
genesis_slot = config.GENESIS_SLOT
genesis_epoch = config.GENESIS_EPOCH
chaindb = BeaconChainDB(base_db, config)
genesis_state, genesis_block = create_mock_genesis(
pubkeys=pubkeys[:validator_count],
config=config,
keymap=keymap,
genesis_block_class=SerenityBeaconBlock,
)
for i in range(validator_count):
assert genesis_state.validators[i].is_active(genesis_slot)
chaindb.persist_block(
SerenitySignedBeaconBlock.create(message=genesis_block),
SerenitySignedBeaconBlock,
fork_choice_scoring,
)
chaindb.persist_state(genesis_state)
state = genesis_state
block = SerenitySignedBeaconBlock.create(message=genesis_block)
chain_length = 4 * config.SLOTS_PER_EPOCH
blocks = (block, )
attestations_map = {} # Dict[Slot, Sequence[Attestation]]
for current_slot in range(genesis_slot + 1,
genesis_slot + chain_length + 1):
if current_slot > genesis_slot + config.MIN_ATTESTATION_INCLUSION_DELAY:
attestations = attestations_map[
current_slot - config.MIN_ATTESTATION_INCLUSION_DELAY]
else:
attestations = ()
block = create_mock_block(
state=state,
config=config,
state_machine=fixture_sm_class(chaindb),
signed_block_class=SerenitySignedBeaconBlock,
parent_block=block,
keymap=keymap,
slot=current_slot,
attestations=attestations,
)
# Get state machine instance
sm = fixture_sm_class(chaindb)
state, _ = sm.import_block(block, state)
chaindb.persist_state(state)
chaindb.persist_block(block, SerenitySignedBeaconBlock,
fork_choice_scoring)
blocks += (block, )
# Mock attestations
attestation_slot = current_slot
attestations = create_mock_signed_attestations_at_slot(
state=state,
config=config,
state_machine=fixture_sm_class(chaindb),
attestation_slot=attestation_slot,
beacon_block_root=block.signing_root,
keymap=keymap,
voted_attesters_ratio=1.0,
)
attestations_map[attestation_slot] = attestations
assert state.slot == chain_length + genesis_slot
# Justification assertions
# NOTE: why are the number `2` or `3` used in the checks below?
# Answer:
# "We do not check any justification and finality during epochs 0 or 1. We do check for
# justification and finality from epoch 2 onward."
# [epoch 0]------[epoch 1]------>
#
# "In epoch 2, we justify the current epoch. This epoch is in fact justified but we do not
# recognize it in the protocol due to an artifact of the construction of the genesis state
# (using the `zero` value for `Checkpoint` type)."
# [epoch 0]------[epoch 1]------[epoch 2]*------>
# []*: checkpoint justified
# []**: checkpoint finalized
#
# "In epoch 3, we have the previous justified checkpoint at the prior current justified
# checkpoint (so `GENESIS_EPOCH + 2`) and we justify this current epoch. we check finality here
# and see that we finalize the prior justified checkpoint at epoch 2."
# [epoch 0]------[epoch 1]------[epoch 2]**------[epoch 3]*------>
#
# "Given the way we handle epoch processing (i.e. process a given epoch at the start of
# the next epoch), we need to transition through `4 * SLOTS_PER_EPOCH` worth of slots to
# include the processing of epoch 3."
#
# source: https://github.com/ethereum/trinity/pull/1214#issuecomment-546184080
#
# epoch | prev_justified_checkpoint | cur_justified_checkpoint | finalized_checkpoint
# ------|---------------------------|--------------------------|---------------------
# 0 | 0 | 0 | 0
# 1 | 0 | 0 | 0
# 2 | 0 | 0 | 0
# 3 | 0 | 2 | 0
# 4 | 2 | 3 | 2
assert state.previous_justified_checkpoint.epoch == 2 + genesis_epoch
assert state.current_justified_checkpoint.epoch == 3 + genesis_epoch
assert state.finalized_checkpoint.epoch == 2 + genesis_epoch
def mock_bls(mocker, request):
if 'noautofixture' in request.keywords:
bls.use(PyECCBackend)
else:
bls.use_noop_backend()