def test_proposer_slashing(state, pubkeys, privkeys):
test_state = deepcopy(state)
current_epoch = get_current_epoch(test_state)
validator_index = get_active_validator_indices(test_state.validator_registry, current_epoch)[-1]
privkey = privkeys[validator_index]
slot = spec.GENESIS_SLOT
header_1 = BeaconBlockHeader(
slot=slot,
previous_block_root=ZERO_HASH,
state_root=ZERO_HASH,
block_body_root=ZERO_HASH,
signature=EMPTY_SIGNATURE,
)
header_2 = deepcopy(header_1)
header_2.previous_block_root = b'\x02' * 32
header_2.slot = slot + 1
domain = get_domain(
fork=test_state.fork,
epoch=get_current_epoch(test_state),
domain_type=spec.DOMAIN_BEACON_BLOCK,
)
header_1.signature = bls.sign(
message_hash=signed_root(header_1),
privkey=privkey,
domain=domain,
)
header_2.signature = bls.sign(
message_hash=signed_root(header_2),
privkey=privkey,
domain=domain,
)
proposer_slashing = ProposerSlashing(
proposer_index=validator_index,
header_1=header_1,
header_2=header_2,
)
#
# Add to state via block transition
#
block = build_empty_block_for_next_slot(test_state)
block.body.proposer_slashings.append(proposer_slashing)
state_transition(test_state, block)
assert not state.validator_registry[validator_index].initiated_exit
assert not state.validator_registry[validator_index].slashed
slashed_validator = test_state.validator_registry[validator_index]
assert not slashed_validator.initiated_exit
assert slashed_validator.slashed
assert slashed_validator.exit_epoch < spec.FAR_FUTURE_EPOCH
assert slashed_validator.withdrawable_epoch < spec.FAR_FUTURE_EPOCH
# lost whistleblower reward
assert test_state.validator_balances[validator_index] < state.validator_balances[validator_index]
return state, [block], test_state
def test_transfer(state, pubkeys, privkeys):
pre_state = deepcopy(state)
current_epoch = get_current_epoch(pre_state)
sender_index = get_active_validator_indices(pre_state.validator_registry, current_epoch)[-1]
recipient_index = get_active_validator_indices(pre_state.validator_registry, current_epoch)[0]
transfer_pubkey = pubkeys[-1]
transfer_privkey = privkeys[-1]
amount = pre_state.validator_balances[sender_index]
pre_transfer_recipient_balance = pre_state.validator_balances[recipient_index]
transfer = Transfer(
sender=sender_index,
recipient=recipient_index,
amount=amount,
fee=0,
slot=pre_state.slot + 1,
pubkey=transfer_pubkey,
signature=EMPTY_SIGNATURE,
)
transfer.signature = bls.sign(
message_hash=signed_root(transfer),
privkey=transfer_privkey,
domain=get_domain(
fork=pre_state.fork,
epoch=get_current_epoch(pre_state),
domain_type=spec.DOMAIN_TRANSFER,
)
)
# ensure withdrawal_credentials reproducable
pre_state.validator_registry[sender_index].withdrawal_credentials = (
spec.BLS_WITHDRAWAL_PREFIX_BYTE + hash(transfer_pubkey)[1:]
)
# un-activate so validator can transfer
pre_state.validator_registry[sender_index].activation_epoch = spec.FAR_FUTURE_EPOCH
post_state = deepcopy(pre_state)
#
# Add to state via block transition
#
block = build_empty_block_for_next_slot(post_state)
block.body.transfers.append(transfer)
state_transition(post_state, block)
sender_balance = post_state.validator_balances[sender_index]
recipient_balance = post_state.validator_balances[recipient_index]
assert sender_balance == 0
assert recipient_balance == pre_transfer_recipient_balance + amount
return pre_state, [block], post_state
def build_attestation_data(state, slot, shard):
assert state.slot >= slot
block_root = build_empty_block_for_next_slot(state).previous_block_root
epoch_start_slot = get_epoch_start_slot(get_current_epoch(state))
if epoch_start_slot == slot:
epoch_boundary_root = block_root
else:
get_block_root(state, epoch_start_slot)
if slot < epoch_start_slot:
justified_block_root = state.previous_justified_root
else:
justified_block_root = state.current_justified_root
return AttestationData(
slot=slot,
shard=shard,
beacon_block_root=block_root,
source_epoch=state.current_justified_epoch,
source_root=justified_block_root,
target_root=epoch_boundary_root,
crosslink_data_root=spec.ZERO_HASH,
previous_crosslink=deepcopy(state.latest_crosslinks[shard]),
)
def test_validator_already_exited(state):
pre_state = deepcopy(state)
#
# setup pre_state
#
# move state forward PERSISTENT_COMMITTEE_PERIOD epochs to allow validator able to exit
pre_state.slot += spec.PERSISTENT_COMMITTEE_PERIOD * spec.SLOTS_PER_EPOCH
current_epoch = get_current_epoch(pre_state)
validator_index = get_active_validator_indices(
pre_state.validator_registry, current_epoch)[0]
privkey = pubkey_to_privkey[
pre_state.validator_registry[validator_index].pubkey]
# but validator already has exited
pre_state.validator_registry[
validator_index].exit_epoch = current_epoch + 2
#
# build voluntary exit
#
voluntary_exit = build_voluntary_exit(
pre_state,
current_epoch,
validator_index,
privkey,
)
with pytest.raises(AssertionError):
process_voluntary_exit(pre_state, voluntary_exit)
return pre_state, voluntary_exit, None
def test_validator_not_active(state):
pre_state = deepcopy(state)
current_epoch = get_current_epoch(pre_state)
validator_index = get_active_validator_indices(
pre_state.validator_registry, current_epoch)[0]
privkey = pubkey_to_privkey[
pre_state.validator_registry[validator_index].pubkey]
#
# setup pre_state
#
pre_state.validator_registry[
validator_index].activation_epoch = spec.FAR_FUTURE_EPOCH
#
# build and test voluntary exit
#
voluntary_exit = build_voluntary_exit(
pre_state,
current_epoch,
validator_index,
privkey,
)
with pytest.raises(AssertionError):
process_voluntary_exit(pre_state, voluntary_exit)
return pre_state, voluntary_exit, None
def test_success(state):
pre_state = deepcopy(state)
#
# setup pre_state
#
# move state forward PERSISTENT_COMMITTEE_PERIOD epochs to allow for exit
pre_state.slot += spec.PERSISTENT_COMMITTEE_PERIOD * spec.SLOTS_PER_EPOCH
#
# build voluntary exit
#
current_epoch = get_current_epoch(pre_state)
validator_index = get_active_validator_indices(
pre_state.validator_registry, current_epoch)[0]
privkey = pubkey_to_privkey[
pre_state.validator_registry[validator_index].pubkey]
voluntary_exit = build_voluntary_exit(
pre_state,
current_epoch,
validator_index,
privkey,
)
post_state = deepcopy(pre_state)
#
# test valid exit
#
process_voluntary_exit(post_state, voluntary_exit)
assert not pre_state.validator_registry[validator_index].initiated_exit
assert post_state.validator_registry[validator_index].initiated_exit
return pre_state, voluntary_exit, post_state
def test_validator_not_active_long_enough(state):
pre_state = deepcopy(state)
#
# setup pre_state
#
current_epoch = get_current_epoch(pre_state)
validator_index = get_active_validator_indices(
pre_state.validator_registry, current_epoch)[0]
privkey = pubkey_to_privkey[
pre_state.validator_registry[validator_index].pubkey]
# but validator already has initiated exit
pre_state.validator_registry[validator_index].initiated_exit = True
#
# build voluntary exit
#
voluntary_exit = build_voluntary_exit(
pre_state,
current_epoch,
validator_index,
privkey,
)
assert (current_epoch -
pre_state.validator_registry[validator_index].activation_epoch <
spec.PERSISTENT_COMMITTEE_PERIOD)
with pytest.raises(AssertionError):
process_voluntary_exit(pre_state, voluntary_exit)
return pre_state, voluntary_exit, None
def test_voluntary_exit(state, pubkeys, privkeys):
pre_state = deepcopy(state)
validator_index = get_active_validator_indices(pre_state.validator_registry, get_current_epoch(pre_state))[-1]
# move state forward PERSISTENT_COMMITTEE_PERIOD epochs to allow for exit
pre_state.slot += spec.PERSISTENT_COMMITTEE_PERIOD * spec.SLOTS_PER_EPOCH
# artificially trigger registry update at next epoch transition
pre_state.validator_registry_update_epoch -= 1
post_state = deepcopy(pre_state)
voluntary_exit = VoluntaryExit(
epoch=get_current_epoch(pre_state),
validator_index=validator_index,
signature=EMPTY_SIGNATURE,
)
voluntary_exit.signature = bls.sign(
message_hash=signed_root(voluntary_exit),
privkey=privkeys[validator_index],
domain=get_domain(
fork=pre_state.fork,
epoch=get_current_epoch(pre_state),
domain_type=spec.DOMAIN_VOLUNTARY_EXIT,
)
)
#
# Add to state via block transition
#
initiate_exit_block = build_empty_block_for_next_slot(post_state)
initiate_exit_block.body.voluntary_exits.append(voluntary_exit)
state_transition(post_state, initiate_exit_block)
assert not pre_state.validator_registry[validator_index].initiated_exit
assert post_state.validator_registry[validator_index].initiated_exit
assert post_state.validator_registry[validator_index].exit_epoch == spec.FAR_FUTURE_EPOCH
#
# Process within epoch transition
#
exit_block = build_empty_block_for_next_slot(post_state)
exit_block.slot += spec.SLOTS_PER_EPOCH
state_transition(post_state, exit_block)
assert post_state.validator_registry[validator_index].exit_epoch < spec.FAR_FUTURE_EPOCH
return pre_state, [initiate_exit_block, exit_block], post_state
def test_empty_epoch_transition_not_finalizing(state):
test_state = deepcopy(state)
block = build_empty_block_for_next_slot(test_state)
block.slot += spec.SLOTS_PER_EPOCH * 5
state_transition(test_state, block)
assert test_state.slot == block.slot
assert test_state.finalized_epoch < get_current_epoch(test_state) - 4
return state, [block], test_state
def test_historical_batch(state):
pre_state = deepcopy(state)
pre_state.slot += spec.SLOTS_PER_HISTORICAL_ROOT - (pre_state.slot % spec.SLOTS_PER_HISTORICAL_ROOT) - 1
post_state = deepcopy(pre_state)
block = build_empty_block_for_next_slot(post_state)
state_transition(post_state, block)
assert post_state.slot == block.slot
assert get_current_epoch(post_state) % (spec.SLOTS_PER_HISTORICAL_ROOT // spec.SLOTS_PER_EPOCH) == 0
assert len(post_state.historical_roots) == len(pre_state.historical_roots) + 1
return pre_state, [block], post_state
def test_ejection(state):
pre_state = deepcopy(state)
current_epoch = get_current_epoch(pre_state)
validator_index = get_active_validator_indices(pre_state.validator_registry, current_epoch)[-1]
assert pre_state.validator_registry[validator_index].exit_epoch == spec.FAR_FUTURE_EPOCH
# set validator balance to below ejection threshold
pre_state.validator_balances[validator_index] = spec.EJECTION_BALANCE - 1
post_state = deepcopy(pre_state)
#
# trigger epoch transition
#
block = build_empty_block_for_next_slot(post_state)
block.slot += spec.SLOTS_PER_EPOCH
state_transition(post_state, block)
assert post_state.validator_registry[validator_index].exit_epoch < spec.FAR_FUTURE_EPOCH
return pre_state, [block], post_state
def build_deposit_data(state, pubkey, privkey, amount):
deposit_input = DepositInput(
pubkey=pubkey,
# insecurely use pubkey as withdrawal key as well
withdrawal_credentials=spec.BLS_WITHDRAWAL_PREFIX_BYTE +
hash(pubkey)[1:],
proof_of_possession=EMPTY_SIGNATURE,
)
proof_of_possession = bls.sign(message_hash=signed_root(deposit_input),
privkey=privkey,
domain=get_domain(
state.fork,
get_current_epoch(state),
spec.DOMAIN_DEPOSIT,
))
deposit_input.proof_of_possession = proof_of_possession
deposit_data = DepositData(
amount=amount,
timestamp=0,
deposit_input=deposit_input,
)
return deposit_data
def force_registry_change_at_next_epoch(state):
# artificially trigger registry update at next epoch transition
state.finalized_epoch = get_current_epoch(state) - 1
for crosslink in state.latest_crosslinks:
crosslink.epoch = state.finalized_epoch
state.validator_registry_update_epoch = state.finalized_epoch - 1
def test_attestation(state, pubkeys, privkeys):
test_state = deepcopy(state)
slot = state.slot
shard = state.current_shuffling_start_shard
attestation_data = build_attestation_data(state, slot, shard)
crosslink_committees = get_crosslink_committees_at_slot(state, slot)
crosslink_committee = [committee for committee, _shard in crosslink_committees if _shard == attestation_data.shard][0]
committee_size = len(crosslink_committee)
bitfield_length = (committee_size + 7) // 8
aggregation_bitfield = b'\x01' + b'\x00' * (bitfield_length - 1)
custody_bitfield = b'\x00' * bitfield_length
attestation = Attestation(
aggregation_bitfield=aggregation_bitfield,
data=attestation_data,
custody_bitfield=custody_bitfield,
aggregate_signature=EMPTY_SIGNATURE,
)
participants = get_attestation_participants(
test_state,
attestation.data,
attestation.aggregation_bitfield,
)
assert len(participants) == 1
validator_index = participants[0]
privkey = privkeys[validator_index]
message_hash = AttestationDataAndCustodyBit(
data=attestation.data,
custody_bit=0b0,
).hash_tree_root()
attestation.aggregation_signature = bls.sign(
message_hash=message_hash,
privkey=privkey,
domain=get_domain(
fork=test_state.fork,
epoch=get_current_epoch(test_state),
domain_type=spec.DOMAIN_ATTESTATION,
)
)
#
# Add to state via block transition
#
attestation_block = build_empty_block_for_next_slot(test_state)
attestation_block.slot += spec.MIN_ATTESTATION_INCLUSION_DELAY
attestation_block.body.attestations.append(attestation)
state_transition(test_state, attestation_block)
assert len(test_state.current_epoch_attestations) == len(state.current_epoch_attestations) + 1
#
# Epoch transition should move to previous_epoch_attestations
#
pre_current_epoch_attestations = deepcopy(test_state.current_epoch_attestations)
epoch_block = build_empty_block_for_next_slot(test_state)
epoch_block.slot += spec.SLOTS_PER_EPOCH
state_transition(test_state, epoch_block)
assert len(test_state.current_epoch_attestations) == 0
assert test_state.previous_epoch_attestations == pre_current_epoch_attestations
return state, [attestation_block, epoch_block], test_state
