446 lines
14 KiB
Python
446 lines
14 KiB
Python
from copy import deepcopy
|
|
|
|
import pytest
|
|
|
|
from py_ecc import bls
|
|
import eth2spec.phase0.spec as spec
|
|
|
|
from eth2spec.utils.minimal_ssz import signing_root
|
|
from eth2spec.phase0.spec import (
|
|
# constants
|
|
EMPTY_SIGNATURE,
|
|
ZERO_HASH,
|
|
# SSZ
|
|
Deposit,
|
|
Transfer,
|
|
VoluntaryExit,
|
|
# functions
|
|
get_active_validator_indices,
|
|
get_balance,
|
|
get_beacon_proposer_index,
|
|
get_block_root,
|
|
get_current_epoch,
|
|
get_domain,
|
|
get_state_root,
|
|
advance_slot,
|
|
cache_state,
|
|
set_balance,
|
|
verify_merkle_branch,
|
|
hash,
|
|
)
|
|
from eth2spec.phase0.state_transition import (
|
|
state_transition,
|
|
)
|
|
from eth2spec.utils.merkle_minimal import (
|
|
calc_merkle_tree_from_leaves,
|
|
get_merkle_proof,
|
|
get_merkle_root,
|
|
)
|
|
from .helpers import (
|
|
build_deposit_data,
|
|
build_empty_block_for_next_slot,
|
|
get_valid_attestation,
|
|
get_valid_attester_slashing,
|
|
get_valid_proposer_slashing,
|
|
privkeys,
|
|
pubkeys,
|
|
)
|
|
|
|
|
|
# mark entire file as 'sanity'
|
|
pytestmark = pytest.mark.sanity
|
|
|
|
|
|
def test_slot_transition(state):
|
|
test_state = deepcopy(state)
|
|
cache_state(test_state)
|
|
advance_slot(test_state)
|
|
assert test_state.slot == state.slot + 1
|
|
assert get_state_root(test_state, state.slot) == state.hash_tree_root()
|
|
return test_state
|
|
|
|
|
|
def test_empty_block_transition(state):
|
|
test_state = deepcopy(state)
|
|
|
|
block = build_empty_block_for_next_slot(test_state)
|
|
state_transition(test_state, block)
|
|
|
|
assert len(test_state.eth1_data_votes) == len(state.eth1_data_votes) + 1
|
|
assert get_block_root(test_state, state.slot) == block.previous_block_root
|
|
|
|
return state, [block], test_state
|
|
|
|
|
|
def test_skipped_slots(state):
|
|
test_state = deepcopy(state)
|
|
block = build_empty_block_for_next_slot(test_state)
|
|
block.slot += 3
|
|
|
|
state_transition(test_state, block)
|
|
|
|
assert test_state.slot == block.slot
|
|
for slot in range(state.slot, test_state.slot):
|
|
assert get_block_root(test_state, slot) == block.previous_block_root
|
|
|
|
return state, [block], test_state
|
|
|
|
|
|
def test_empty_epoch_transition(state):
|
|
test_state = deepcopy(state)
|
|
block = build_empty_block_for_next_slot(test_state)
|
|
block.slot += spec.SLOTS_PER_EPOCH
|
|
|
|
state_transition(test_state, block)
|
|
|
|
assert test_state.slot == block.slot
|
|
for slot in range(state.slot, test_state.slot):
|
|
assert get_block_root(test_state, slot) == block.previous_block_root
|
|
|
|
return state, [block], test_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
|
|
for index in range(len(test_state.validator_registry)):
|
|
assert get_balance(test_state, index) < get_balance(state, index)
|
|
|
|
return state, [block], test_state
|
|
|
|
|
|
def test_proposer_slashing(state):
|
|
test_state = deepcopy(state)
|
|
proposer_slashing = get_valid_proposer_slashing(state)
|
|
validator_index = proposer_slashing.proposer_index
|
|
|
|
#
|
|
# 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].slashed
|
|
|
|
slashed_validator = test_state.validator_registry[validator_index]
|
|
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 get_balance(test_state, validator_index) < get_balance(state, validator_index)
|
|
|
|
return state, [block], test_state
|
|
|
|
|
|
def test_attester_slashing(state):
|
|
test_state = deepcopy(state)
|
|
attester_slashing = get_valid_attester_slashing(state)
|
|
validator_index = attester_slashing.attestation_1.custody_bit_0_indices[0]
|
|
|
|
#
|
|
# Add to state via block transition
|
|
#
|
|
block = build_empty_block_for_next_slot(test_state)
|
|
block.body.attester_slashings.append(attester_slashing)
|
|
state_transition(test_state, block)
|
|
|
|
assert not state.validator_registry[validator_index].slashed
|
|
|
|
slashed_validator = test_state.validator_registry[validator_index]
|
|
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 get_balance(test_state, validator_index) < get_balance(state, validator_index)
|
|
|
|
proposer_index = get_beacon_proposer_index(test_state)
|
|
# gained whistleblower reward
|
|
assert (
|
|
get_balance(test_state, proposer_index) >
|
|
get_balance(state, proposer_index)
|
|
)
|
|
|
|
return state, [block], test_state
|
|
|
|
|
|
def test_deposit_in_block(state):
|
|
pre_state = deepcopy(state)
|
|
test_deposit_data_leaves = [ZERO_HASH] * len(pre_state.validator_registry)
|
|
|
|
index = len(test_deposit_data_leaves)
|
|
pubkey = pubkeys[index]
|
|
privkey = privkeys[index]
|
|
deposit_data = build_deposit_data(pre_state, pubkey, privkey, spec.MAX_EFFECTIVE_BALANCE)
|
|
|
|
item = hash(deposit_data.serialize())
|
|
test_deposit_data_leaves.append(item)
|
|
tree = calc_merkle_tree_from_leaves(tuple(test_deposit_data_leaves))
|
|
root = get_merkle_root((tuple(test_deposit_data_leaves)))
|
|
proof = list(get_merkle_proof(tree, item_index=index))
|
|
assert verify_merkle_branch(item, proof, spec.DEPOSIT_CONTRACT_TREE_DEPTH, index, root)
|
|
|
|
deposit = Deposit(
|
|
proof=list(proof),
|
|
index=index,
|
|
data=deposit_data,
|
|
)
|
|
|
|
pre_state.latest_eth1_data.deposit_root = root
|
|
pre_state.latest_eth1_data.deposit_count = len(test_deposit_data_leaves)
|
|
post_state = deepcopy(pre_state)
|
|
block = build_empty_block_for_next_slot(post_state)
|
|
block.body.deposits.append(deposit)
|
|
|
|
state_transition(post_state, block)
|
|
assert len(post_state.validator_registry) == len(state.validator_registry) + 1
|
|
assert len(post_state.balances) == len(state.balances) + 1
|
|
assert get_balance(post_state, index) == spec.MAX_EFFECTIVE_BALANCE
|
|
assert post_state.validator_registry[index].pubkey == pubkeys[index]
|
|
|
|
return pre_state, [block], post_state
|
|
|
|
|
|
def test_deposit_top_up(state):
|
|
pre_state = deepcopy(state)
|
|
test_deposit_data_leaves = [ZERO_HASH] * len(pre_state.validator_registry)
|
|
|
|
validator_index = 0
|
|
amount = spec.MAX_EFFECTIVE_BALANCE // 4
|
|
pubkey = pubkeys[validator_index]
|
|
privkey = privkeys[validator_index]
|
|
deposit_data = build_deposit_data(pre_state, pubkey, privkey, amount)
|
|
|
|
merkle_index = len(test_deposit_data_leaves)
|
|
item = hash(deposit_data.serialize())
|
|
test_deposit_data_leaves.append(item)
|
|
tree = calc_merkle_tree_from_leaves(tuple(test_deposit_data_leaves))
|
|
root = get_merkle_root((tuple(test_deposit_data_leaves)))
|
|
proof = list(get_merkle_proof(tree, item_index=merkle_index))
|
|
assert verify_merkle_branch(item, proof, spec.DEPOSIT_CONTRACT_TREE_DEPTH, merkle_index, root)
|
|
|
|
deposit = Deposit(
|
|
proof=list(proof),
|
|
index=merkle_index,
|
|
data=deposit_data,
|
|
)
|
|
|
|
pre_state.latest_eth1_data.deposit_root = root
|
|
pre_state.latest_eth1_data.deposit_count = len(test_deposit_data_leaves)
|
|
block = build_empty_block_for_next_slot(pre_state)
|
|
block.body.deposits.append(deposit)
|
|
|
|
pre_balance = get_balance(pre_state, validator_index)
|
|
post_state = deepcopy(pre_state)
|
|
state_transition(post_state, block)
|
|
assert len(post_state.validator_registry) == len(pre_state.validator_registry)
|
|
assert len(post_state.balances) == len(pre_state.balances)
|
|
assert get_balance(post_state, validator_index) == pre_balance + amount
|
|
|
|
return pre_state, [block], post_state
|
|
|
|
|
|
def test_attestation(state):
|
|
test_state = deepcopy(state)
|
|
attestation = get_valid_attestation(state)
|
|
|
|
#
|
|
# 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
|
|
|
|
proposer_index = get_beacon_proposer_index(test_state)
|
|
assert test_state.balances[proposer_index] > state.balances[proposer_index]
|
|
|
|
#
|
|
# 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
|
|
|
|
|
|
def test_voluntary_exit(state):
|
|
pre_state = deepcopy(state)
|
|
validator_index = get_active_validator_indices(
|
|
pre_state,
|
|
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
|
|
|
|
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=signing_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 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_no_exit_churn_too_long_since_change(state):
|
|
pre_state = deepcopy(state)
|
|
validator_index = get_active_validator_indices(
|
|
pre_state,
|
|
get_current_epoch(pre_state)
|
|
)[-1]
|
|
|
|
#
|
|
# 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
|
|
|
|
post_state = deepcopy(pre_state)
|
|
|
|
#
|
|
# Process registry change but ensure no exit
|
|
#
|
|
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 test_transfer(state):
|
|
pre_state = deepcopy(state)
|
|
current_epoch = get_current_epoch(pre_state)
|
|
sender_index = get_active_validator_indices(pre_state, current_epoch)[-1]
|
|
recipient_index = get_active_validator_indices(pre_state, current_epoch)[0]
|
|
transfer_pubkey = pubkeys[-1]
|
|
transfer_privkey = privkeys[-1]
|
|
amount = get_balance(pre_state, sender_index)
|
|
pre_transfer_recipient_balance = get_balance(pre_state, 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=signing_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 = get_balance(post_state, sender_index)
|
|
recipient_balance = get_balance(post_state, recipient_index)
|
|
assert sender_balance == 0
|
|
assert recipient_balance == pre_transfer_recipient_balance + amount
|
|
|
|
return pre_state, [block], post_state
|
|
|
|
|
|
def test_balance_driven_status_transitions(state):
|
|
pre_state = deepcopy(state)
|
|
|
|
current_epoch = get_current_epoch(pre_state)
|
|
validator_index = get_active_validator_indices(pre_state, current_epoch)[-1]
|
|
|
|
assert pre_state.validator_registry[validator_index].exit_epoch == spec.FAR_FUTURE_EPOCH
|
|
|
|
# set validator balance to below ejection threshold
|
|
set_balance(pre_state, 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 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
|