def test_per_slot_transition(base_db, genesis_block, genesis_state,
fixture_sm_class, config, state_slot, keymap):
chaindb = BeaconChainDB(base_db)
chaindb.persist_block(genesis_block, SerenityBeaconBlock)
chaindb.persist_state(genesis_state)
state = genesis_state
# Create a block
block = create_mock_block(
state=state,
config=config,
state_machine=fixture_sm_class(
chaindb,
genesis_block,
),
block_class=SerenityBeaconBlock,
parent_block=genesis_block,
keymap=keymap,
slot=state_slot,
)
# Store in chaindb
chaindb.persist_block(block, SerenityBeaconBlock)
# Get state machine instance
sm = fixture_sm_class(
chaindb,
block,
)
# Get state transition instance
st = sm.state_transition_class(sm.config)
# NOTE: we want to run both functions, however they are run independently
# so we have two function calls
updated_state = st.cache_state(state)
updated_state = st.per_slot_transition(updated_state)
# Ensure that slot gets increased by 1
assert updated_state.slot == state.slot + 1
# latest_block_roots
latest_block_roots_index = (updated_state.slot -
1) % st.config.SLOTS_PER_HISTORICAL_ROOT
assert updated_state.latest_block_roots[
latest_block_roots_index] == block.previous_block_root
# historical_roots
if updated_state.slot % st.config.SLOTS_PER_HISTORICAL_ROOT == 0:
historical_batch = HistoricalBatch(
block_roots=state.latest_block_roots,
state_roots=state.latest_state_roots,
slots_per_historical_root=config.SLOTS_PER_HISTORICAL_ROOT,
)
assert updated_state.historical_roots[
-1] == historical_batch.hash_tree_root
else:
assert updated_state.historical_roots == state.historical_roots
def get_fresh_chain_db():
db = AtomicDB()
genesis_block = create_test_block(slot=0)
chain_db = BeaconChainDB(db)
chain_db.persist_block(genesis_block, BeaconBlock)
return chain_db
def test_per_slot_transition(base_db,
genesis_block,
genesis_state,
fixture_sm_class,
config,
state_slot,
keymap):
chaindb = BeaconChainDB(base_db)
chaindb.persist_block(genesis_block, SerenityBeaconBlock)
chaindb.persist_state(genesis_state)
state = genesis_state
# Create a block
block = create_mock_block(
state=state,
config=config,
state_machine=fixture_sm_class(
chaindb,
genesis_block,
),
block_class=SerenityBeaconBlock,
parent_block=genesis_block,
keymap=keymap,
slot=state_slot,
)
# Store in chaindb
chaindb.persist_block(block, SerenityBeaconBlock)
# Get state machine instance
sm = fixture_sm_class(
chaindb,
block,
)
# Get state transition instance
st = sm.state_transition_class(sm.config)
updated_state = st.per_slot_transition(state, block.parent_root)
# Ensure that slot gets increased by 1
assert updated_state.slot == state.slot + 1
# latest_block_roots
latest_block_roots_index = (updated_state.slot - 1) % st.config.SLOTS_PER_HISTORICAL_ROOT
assert updated_state.latest_block_roots[latest_block_roots_index] == block.parent_root
# historical_roots
if updated_state.slot % st.config.SLOTS_PER_HISTORICAL_ROOT == 0:
assert updated_state.historical_roots[-1] == get_merkle_root(
updated_state.latest_block_roots
)
else:
assert updated_state.historical_roots == state.historical_roots
def test_demo(base_db, sample_beacon_block_params, genesis_state,
fixture_sm_class, config, privkeys, pubkeys):
chaindb = BeaconChainDB(base_db)
state = genesis_state
block = SerenityBeaconBlock(**sample_beacon_block_params).copy(
slot=state.slot + 2,
state_root=state.root,
)
# Sign block
beacon_proposer_index = get_beacon_proposer_index(
state,
block.slot,
config.EPOCH_LENGTH,
)
index_in_privkeys = pubkeys.index(
state.validator_registry[beacon_proposer_index].pubkey)
beacon_proposer_privkey = privkeys[index_in_privkeys]
empty_signature_block_root = block.block_without_signature_root
proposal_root = ProposalSignedData(
block.slot,
config.BEACON_CHAIN_SHARD_NUMBER,
empty_signature_block_root,
).root
block = block.copy(signature=bls.sign(
message=proposal_root,
privkey=beacon_proposer_privkey,
domain=SignatureDomain.DOMAIN_PROPOSAL,
), )
# Store in chaindb
chaindb.persist_block(block, SerenityBeaconBlock)
chaindb.persist_state(state)
# Get state machine instance
sm = fixture_sm_class(chaindb, block.root, SerenityBeaconBlock)
result_state, _ = sm.import_block(block)
assert state.slot == 0
assert result_state.slot == block.slot
assert isinstance(sm.block, SerenityBeaconBlock)
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, num_validators, config, keymap, fixture_sm_class):
genesis_slot = config.GENESIS_SLOT
genesis_epoch = config.GENESIS_EPOCH
chaindb = BeaconChainDB(base_db)
genesis_state, genesis_block = create_mock_genesis(
num_validators=num_validators,
config=config,
keymap=keymap,
genesis_block_class=SerenityBeaconBlock,
)
for i in range(num_validators):
assert genesis_state.validator_registry[i].is_active(genesis_slot)
chaindb.persist_block(genesis_block, SerenityBeaconBlock)
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,
blocks[-1],
),
block_class=SerenityBeaconBlock,
parent_block=block,
keymap=keymap,
slot=current_slot,
attestations=attestations,
)
# Get state machine instance
sm = fixture_sm_class(
chaindb,
blocks[-1],
)
state, _ = sm.import_block(block)
chaindb.persist_state(state)
chaindb.persist_block(block, SerenityBeaconBlock)
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,
block,
),
attestation_slot=attestation_slot,
beacon_block_root=block.signed_root,
keymap=keymap,
voted_attesters_ratio=1.0,
)
attestations_map[attestation_slot] = attestations
assert state.slot == chain_length + genesis_slot
assert isinstance(sm.block, SerenityBeaconBlock)
# Justification assertions
assert state.current_justified_epoch == 2 + genesis_epoch
assert state.finalized_epoch == 1 + 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 test_per_slot_transition(base_db, genesis_block, genesis_state,
fixture_sm_class, config, state_slot, keymap):
chaindb = BeaconChainDB(base_db)
chaindb.persist_block(genesis_block, SerenityBeaconBlock)
chaindb.persist_state(genesis_state)
state = genesis_state
# Create a block
block = create_mock_block(
state=state,
config=config,
state_machine=fixture_sm_class(
chaindb,
genesis_block,
),
block_class=SerenityBeaconBlock,
parent_block=genesis_block,
keymap=keymap,
slot=state_slot,
)
# Store in chaindb
chaindb.persist_block(block, SerenityBeaconBlock)
# Get state machine instance
sm = fixture_sm_class(
chaindb,
block,
)
# Get state transition instance
st = sm.state_transition_class(sm.config)
updated_state = st.per_slot_transition(state, block.parent_root)
# Ensure that slot gets increased by 1
assert updated_state.slot == state.slot + 1
# Validator Registry
# Tweaking the slot, so that we get the correct proposer index
beacon_proposer_index = get_beacon_proposer_index(
state,
state.slot + 1,
st.config.GENESIS_EPOCH,
st.config.EPOCH_LENGTH,
st.config.TARGET_COMMITTEE_SIZE,
st.config.SHARD_COUNT,
)
for validator_index, _ in enumerate(updated_state.validator_registry):
if validator_index != beacon_proposer_index:
# Validator Record shouldn't change if not proposer
assert (updated_state.validator_registry[validator_index] ==
state.validator_registry[validator_index])
else:
# randao layers of proposer's record should increase by 1
assert (
updated_state.validator_registry[validator_index].randao_layers
== state.validator_registry[validator_index].randao_layers + 1)
# latest_randao_mixes
assert (
updated_state.latest_randao_mixes[updated_state.slot %
st.config.LATEST_RANDAO_MIXES_LENGTH]
== state.latest_randao_mixes[(state.slot) %
st.config.LATEST_RANDAO_MIXES_LENGTH])
# latest_block_roots
latest_block_roots_index = (updated_state.slot -
1) % st.config.LATEST_BLOCK_ROOTS_LENGTH
assert updated_state.latest_block_roots[
latest_block_roots_index] == block.parent_root
# batched_block_roots
if updated_state.slot % st.config.LATEST_BLOCK_ROOTS_LENGTH == 0:
assert updated_state.batched_block_roots[-1] == get_merkle_root(
updated_state.latest_block_roots)
else:
assert updated_state.batched_block_roots == state.batched_block_roots
def test_demo(base_db, keymap):
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,
)
fixture_sm_class = SerenityStateMachine.configure(
__name__='SerenityStateMachineForTesting',
config=config,
)
num_validators = 40
genesis_slot = config.GENESIS_SLOT
genesis_epoch = config.GENESIS_EPOCH
chaindb = BeaconChainDB(base_db, config)
genesis_state, genesis_block = create_mock_genesis(
num_validators=num_validators,
config=config,
keymap=keymap,
genesis_block_class=SerenityBeaconBlock,
)
for i in range(num_validators):
assert genesis_state.validator_registry[i].is_active(genesis_slot)
chaindb.persist_block(genesis_block, SerenityBeaconBlock)
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,
blocks[-1],
),
block_class=SerenityBeaconBlock,
parent_block=block,
keymap=keymap,
slot=current_slot,
attestations=attestations,
)
# Get state machine instance
sm = fixture_sm_class(
chaindb,
blocks[-1],
)
state, _ = sm.import_block(block)
chaindb.persist_state(state)
chaindb.persist_block(block, SerenityBeaconBlock)
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,
block,
),
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
assert isinstance(sm.block, SerenityBeaconBlock)
# Justification assertions
assert state.current_justified_epoch == 2 + genesis_epoch
assert state.finalized_epoch == 1 + genesis_epoch
def test_demo(base_db,
num_validators,
config,
keymap,
fixture_sm_class):
chaindb = BeaconChainDB(base_db)
genesis_state, genesis_block = create_mock_genesis(
num_validators=num_validators,
config=config,
keymap=keymap,
genesis_block_class=SerenityBeaconBlock,
)
for i in range(num_validators):
assert genesis_state.validator_registry[i].is_active(0)
chaindb.persist_block(genesis_block, SerenityBeaconBlock)
chaindb.persist_state(genesis_state)
state = genesis_state
current_slot = 1
chain_length = 3 * config.EPOCH_LENGTH
attestations = ()
for current_slot in range(chain_length):
# two epochs
block = create_mock_block(
state=state,
config=config,
block_class=SerenityBeaconBlock,
parent_block=genesis_block,
keymap=keymap,
slot=current_slot,
attestations=attestations,
)
block = block.copy(
body=block.body.copy(
attestations=attestations,
)
)
# Get state machine instance
sm = fixture_sm_class(
chaindb,
block,
parent_block_class=SerenityBeaconBlock,
)
state, _ = sm.import_block(block)
# TODO: move to chain level?
block = block.copy(
state_root=state.root,
)
chaindb.persist_state(state)
chaindb.persist_block(block, SerenityBeaconBlock)
if current_slot > config.MIN_ATTESTATION_INCLUSION_DELAY:
attestation_slot = current_slot - config.MIN_ATTESTATION_INCLUSION_DELAY
attestations = create_mock_signed_attestations_at_slot(
state,
config,
attestation_slot,
keymap,
1.0,
)
else:
attestations = ()
assert state.slot == chain_length - 1
assert isinstance(sm.block, SerenityBeaconBlock)
