def handle_channel_closed(
channel_state: NettingChannelState,
state_change: ContractReceiveChannelClosed,
) -> TransitionResult:
events = list()
just_closed = (state_change.channel_identifier == channel_state.identifier
and get_status(channel_state)
in CHANNEL_STATES_PRIOR_TO_CLOSED)
if just_closed:
set_closed(channel_state, state_change.closed_block_number)
balance_proof = channel_state.partner_state.balance_proof
call_update = (
state_change.closing_address != channel_state.our_state.address
and balance_proof)
if call_update:
# The channel was closed by our partner, if there is a balance
# proof available update this node half of the state
update = ContractSendChannelUpdateTransfer(
channel_state.identifier,
balance_proof,
)
events.append(update)
unlock_proofs = get_known_unlocks(channel_state.partner_state)
if unlock_proofs:
onchain_unlock = ContractSendChannelUnlock(
channel_state.identifier,
unlock_proofs,
)
events.append(onchain_unlock)
return TransitionResult(channel_state, events)
def test_is_transaction_expired():
expiration = 24
block_number = expiration + 1
transaction = ContractSendChannelUpdateTransfer(
expiration=expiration,
balance_proof=None,
triggered_by_block_hash=factories.make_block_hash(),
)
assert is_transaction_expired(transaction, block_number)
transaction = ContractSendSecretReveal(
expiration=expiration,
secret=factories.UNIT_SECRET,
triggered_by_block_hash=factories.make_block_hash(),
)
assert is_transaction_expired(transaction, block_number)
transaction = ContractSendSecretReveal(
expiration=block_number,
secret=factories.UNIT_SECRET,
triggered_by_block_hash=factories.make_block_hash(),
)
assert not is_transaction_expired(transaction, block_number)