def test_target_lock_is_expired_if_secret_is_not_registered_onchain():
lock_amount = 7
block_number = 1
pseudo_random_generator = random.Random()
channels = make_channel_set([channel_properties2])
from_transfer = make_target_transfer(channels[0],
amount=lock_amount,
block_number=1)
init = ActionInitTarget(
from_hop=channels.get_hop(0),
transfer=from_transfer,
balance_proof=from_transfer.balance_proof,
sender=from_transfer.balance_proof.sender, # pylint: disable=no-member
)
init_transition = target.state_transition(
target_state=None,
state_change=init,
channel_state=channels[0],
pseudo_random_generator=pseudo_random_generator,
block_number=block_number,
)
assert init_transition.new_state is not None
secret_reveal_iteration = target.state_transition(
target_state=init_transition.new_state,
state_change=ReceiveSecretReveal(UNIT_SECRET,
channels[0].partner_state.address),
channel_state=channels[0],
pseudo_random_generator=pseudo_random_generator,
block_number=block_number,
)
expired_block_number = channel.get_receiver_expiration_threshold(
from_transfer.lock.expiration)
iteration = target.state_transition(
target_state=secret_reveal_iteration.new_state,
state_change=Block(expired_block_number, None, None),
channel_state=channels[0],
pseudo_random_generator=pseudo_random_generator,
block_number=expired_block_number,
)
assert search_for_item(iteration.events, EventUnlockClaimFailed, {})
def handle_block(
target_state: TargetTransferState,
channel_state: NettingChannelState,
block_number: BlockNumber,
block_hash: BlockHash,
) -> TransitionResult[TargetTransferState]:
""" After Raiden learns about a new block this function must be called to
handle expiration of the hash time lock.
"""
transfer = target_state.transfer
events = list()
lock = transfer.lock
secret_known = channel.is_secret_known(
channel_state.partner_state,
lock.secrethash,
)
lock_has_expired, _ = channel.is_lock_expired(
end_state=channel_state.our_state,
lock=lock,
block_number=block_number,
lock_expiration_threshold=channel.get_receiver_expiration_threshold(
lock),
)
if lock_has_expired and target_state.state != 'expired':
failed = EventUnlockClaimFailed(
identifier=transfer.payment_identifier,
secrethash=transfer.lock.secrethash,
reason=f'lock expired',
)
target_state.state = TargetTransferState.EXPIRED
events = [failed]
elif secret_known:
events = events_for_onchain_secretreveal(
target_state=target_state,
channel_state=channel_state,
block_number=block_number,
block_hash=block_hash,
)
return TransitionResult(target_state, events)
def handle_block(
target_state: TargetTransferState,
channel_state: NettingChannelState,
block_number: BlockNumber,
):
""" After Raiden learns about a new block this function must be called to
handle expiration of the hash time lock.
"""
transfer = target_state.transfer
events = list()
lock = transfer.lock
secret_known = channel.is_secret_known(
channel_state.partner_state,
lock.secrethash,
)
lock_has_expired, _ = channel.is_lock_expired(
end_state=channel_state.our_state,
lock=lock,
block_number=block_number,
lock_expiration_threshold=channel.get_receiver_expiration_threshold(lock),
)
if lock_has_expired and target_state.state != 'expired':
failed = EventUnlockClaimFailed(
identifier=transfer.payment_identifier,
secrethash=transfer.lock.secrethash,
reason=f'lock expired',
)
target_state.state = TargetTransferState.EXPIRED
events = [failed]
elif secret_known:
events = events_for_onchain_secretreveal(
target_state,
channel_state,
block_number,
)
return TransitionResult(target_state, events)
def test_target_lock_is_expired_if_secret_is_not_registered_onchain():
lock_amount = 7
block_number = 1
pseudo_random_generator = random.Random()
channels = make_channel_set([channel_properties2])
from_transfer = make_target_transfer(channels[0], amount=lock_amount, block_number=1)
init = ActionInitTarget(channels.get_route(0), from_transfer)
init_transition = target.state_transition(
target_state=None,
state_change=init,
channel_state=channels[0],
pseudo_random_generator=pseudo_random_generator,
block_number=block_number,
)
assert init_transition.new_state is not None
secret_reveal_iteration = target.state_transition(
target_state=init_transition.new_state,
state_change=ReceiveSecretReveal(UNIT_SECRET, channels[0].partner_state.address),
channel_state=channels[0],
pseudo_random_generator=pseudo_random_generator,
block_number=block_number,
)
expired_block_number = channel.get_receiver_expiration_threshold(from_transfer.lock)
iteration = target.state_transition(
target_state=secret_reveal_iteration.new_state,
state_change=Block(expired_block_number, None, None),
channel_state=channels[0],
pseudo_random_generator=pseudo_random_generator,
block_number=expired_block_number,
)
assert must_contain_entry(iteration.events, EventUnlockClaimFailed, {})