def refund(self, wallet):
'''
Creates transaction that can refund a contract.
Args:
wallet (obj): wallet object of the Atomic Swap contract creator
Returns:
BitcoinTransaction: unsigned transaction object with refund transaction
Raises:
RuntimeError: if contract is still valid
ValueError: if contract balance is 0
'''
if self.locktime > datetime.utcnow():
locktime_string = self.locktime.strftime('%Y-%m-%d %H:%M:%S')
raise RuntimeError(
f"This contract is still valid! It can't be refunded until {locktime_string} UTC."
)
if self.balance == 0:
raise ValueError("Balance of this contract is 0.")
transaction = BitcoinTransaction(
network=self.network,
recipient_address=self.refund_address,
value=self.value,
solvable_utxo=[
self.get_contract_utxo(wallet,
refund=True,
contract=self.contract)
],
tx_locktime=self.locktime_timestamp,
)
transaction.create_unsigned_transaction()
return transaction
def redeem(self, wallet, secret: str) -> BitcoinTransaction:
'''
Creates transaction that can redeem a contract.
Args:
wallet (obj): wallet object of the Atomic Swap contract recipient
secret (str): transaction secret that should match the contract secret hash (after hashing)
Returns:
BitcoinTransaction: unsigned transaction object with redeem transaction
Raises:
ValueError: if contract balance is 0
'''
if self.balance == 0:
raise ValueError("Balance of this contract is 0.")
transaction = BitcoinTransaction(
network=self.network,
recipient_address=self.recipient_address,
value=self.value,
solvable_utxo=[
self.get_contract_utxo(wallet, secret, contract=self.contract)
])
transaction.create_unsigned_transaction()
return transaction
def redeem(self, wallet, secret):
if self.balance == 0:
raise ValueError("Balance of this contract is 0.")
transaction = BitcoinTransaction(
network=self.network,
recipient_address=self.recipient_address,
value=self.value,
solvable_utxo=[self.get_contract_utxo(wallet, secret, contract=self.contract)]
)
transaction.create_unsigned_transaction()
return transaction
def refund(self, wallet):
if self.locktime > datetime.utcnow():
locktime_string = self.locktime.strftime('%Y-%m-%d %H:%M:%S')
raise RuntimeError(f"This contract is still valid! It can't be refunded until {locktime_string} UTC.")
if self.balance == 0:
raise ValueError("Balance of this contract is 0.")
transaction = BitcoinTransaction(
network=self.network,
recipient_address=self.refund_address,
value=self.value,
solvable_utxo=[self.get_contract_utxo(wallet, refund=True, contract=self.contract)],
tx_locktime=self.locktime_timestamp,
)
transaction.create_unsigned_transaction()
return transaction
def test_transaction_with_invalid_recipient_address():
with raises(ValueError, match='Given recipient address is invalid.'):
BitcoinTransaction(BitcoinTestNet(), 'invalid_address', 0.01, [])