def solve(self, digest):
from .transaction import Witness
pubkey = self.privk.pub()
sig = self.privk.sign(digest)
return (ScriptSig.from_stack_data([
StackData.from_bytes(sig + self.sighash.as_byte()),
StackData.from_bytes(pubkey.compressed)
]), Witness([]))
def inputs(utxos, previous_transaction_indexes=None):
inputs, amount = list(), int()
for index, utxo in enumerate(utxos):
if previous_transaction_indexes is None or index in previous_transaction_indexes:
amount += utxo["amount"]
inputs.append(
TxIn(txid=utxo["hash"], txout=utxo["output_index"],
script_sig=ScriptSig.empty(), sequence=Sequence.max()))
return inputs, amount
def _get_unsigned_txn(self):
# outputs_amounts is copied so any instance can be modified with change_fee,
# and will still function correctly, i.e the change address won't already
# be in the self._outputs_amounts dict
self._modified_outputs_amounts = self.outputs_amounts.copy()
# adding change address to outputs, if there is leftover balance that isn't dust
if self._change_amount > 0:
self._modified_outputs_amounts[self.change_address] = self._change_amount
outputs = []
for i, (addr, amount) in enumerate(self._modified_outputs_amounts.items()):
outputs.append(TxOut(
value=amount,
n=i,
script_pubkey=self.get_script_pubkey(addr)
))
inputs = []
for t in self._specific_utxo_data:
# build inputs using the UTXO data in self._specific_utxo_data,
# script_sig is empty as the transaction will be signed later
inputs.append(
TxIn(txid=t[0],
txout=t[1],
script_sig=ScriptSig.empty(),
sequence=Sequence.max(),
witness=Witness([StackData.zero()])) if self.is_segwit else None,
)
if self.is_segwit:
transaction = MutableSegWitTransaction(
version=TX_VERSION,
ins=inputs,
outs=outputs,
locktime=Locktime(self.locktime),
)
else:
transaction = MutableTransaction(
version=TX_VERSION,
ins=inputs,
outs=outputs,
locktime=Locktime(self.locktime)
)
return transaction
def createContractInput(fundingTx):
to_spend = fundingTx #TODO Failing here
#Signer=fundingTxn() #Todo LATEST Failing here .Change to spend input Transaction
Signer = ScriptSig.empty() #TOdo create SignFundingTx(FundingTx, Solver)
SigScript = [
MutableTxIn(
txid=to_spend, # Input need not be a segwit transaction.
txout=0,
script_sig=Signer,
sequence=Sequence.max())
]
return SigScript
def solve(self, *digests):
from .transaction import Witness
if len(digests) != len(self.privkeys):
raise ValueError('{} privkeys provided and {} digests'.format(
len(self.privkeys), len(digests)))
script_sig_data = [StackData.zero()]
for priv, digest, sighash in zip(self.privkeys, digests,
self.sighashes):
sig = priv.sign(digest)
script_sig_data.append(
StackData.from_bytes(sig + sighash.as_byte()))
return ScriptSig.from_stack_data(script_sig_data), Witness([])
def _build_inputs(
utxos: list,
previous_transaction_indexes: Optional[list] = None) -> tuple:
inputs, amount = [], 0
for index, utxo in enumerate(utxos):
if previous_transaction_indexes is None or index in previous_transaction_indexes:
amount += utxo["value"]
inputs.append(
TxIn(txid=utxo["tx_hash"],
txout=utxo["tx_output_n"],
script_sig=ScriptSig.empty(),
sequence=Sequence.max()))
return inputs, amount
def fundingTxn():
Signer = ScriptSig.empty()
outvalue = fundingInput_value(fundingTxIn, 0) - 400
MultiSigTx = MutableSegWitTransaction(
version=1, #Publish to the Blockchain
ins=[
TxIn(txid=fundingTxIn_id,
txout=0,
script_sig=Signer,
sequence=Sequence.max())
],
outs=[TxOut(value=outvalue, n=0, script_pubkey=FundingScript)
], # todo must change this to access the contract script
locktime=Locktime(0))
MultiSigTxSigned = MultiSigTx.spend(
[fundingTxIn.outs[0]],
[funding_sig]) # ToDo Failing here - spend attribute not found
print("funding tx signed ", MultiSigTxSigned.hexlify())
# return MultiSigTx,p2sh_solver,MultiSigTxSigned.outs[0]; # TODo when to Return Signed MultiSigTransaction
return MultiSigTxSigned.txid, MultiSigTxSigned.outs[0]
def sweepTx(MultiSigTx, MultiSigTxOutput, MultiSigTxSolver, to_pubkey,
to_index, to_value):
to_spend = MultiSigTx
unsigned = MutableSegWitTransaction(
version=1,
ins=[
TxIn(
txid=to_spend, #.txid,
txout=to_index,
script_sig=ScriptSig.empty(),
sequence=Sequence.max())
],
outs=[
TxOut(value=to_value - txFee,
n=0,
script_pubkey=P2pkhScript(to_pubkey))
], # todo make funding_pubkey a parameter. This must sweep back tp A & B
locktime=Locktime(0))
solver = MultiSigTxSolver
signed = unsigned.spend(
[MultiSigTxOutput],
[solver]) #print ("Return tx signed ",signed.hexlify())
return signed.hexlify()
def build_transaction(self, transaction_id, wallet, amount, locktime=0):
"""
Build Bitcoin refund transaction.
:param transaction_id: Bitcoin fund transaction id to redeem.
:type transaction_id: str
:param wallet: Bitcoin sender wallet.
:type wallet: bitcoin.wallet.Wallet
:param amount: Bitcoin amount to withdraw.
:type amount: int
:param locktime: Bitcoin transaction lock time, defaults to 0.
:type locktime: int
:returns: RefundTransaction -- Bitcoin refund transaction instance.
>>> from shuttle.providers.bitcoin.transaction import RefundTransaction
>>> from shuttle.providers.bitcoin.wallet import Wallet
>>> sender_wallet = Wallet(network="testnet").from_passphrase("meherett")
>>> refund_transaction = RefundTransaction(network="testnet")
>>> refund_transaction.build_transaction(transaction_id="1006a6f537fcc4888c65f6ff4f91818a1c6e19bdd3130f59391c00212c552fbd", wallet=sender_wallet, amount=10000)
<shuttle.providers.bitcoin.transaction.RefundTransaction object at 0x0409DAF0>
"""
# Checking parameter instances
if not isinstance(transaction_id, str):
raise TypeError("invalid amount instance, only takes string type")
if not isinstance(wallet, Wallet):
raise TypeError(
"invalid wallet instance, only takes Bitcoin Wallet class")
# Setting transaction_id and wallet
self.transaction_id, self.wallet = transaction_id, wallet
# Getting transaction detail by id
self.transaction_detail = get_transaction_detail(self.transaction_id)
# Getting Hash time lock contract output detail
self.htlc_detail = self.transaction_detail["outputs"][0]
# Getting HTLC funded amount balance
htlc_amount = self.htlc_detail["value"]
# Calculating fee
self._fee = fee_calculator(1, 1)
if amount < self._fee:
raise BalanceError("insufficient spend utxos")
elif not htlc_amount >= (amount - self._fee):
raise BalanceError("insufficient spend utxos",
f"maximum you can withdraw {htlc_amount}")
# Building mutable Bitcoin transaction
self.transaction = MutableTransaction(
version=self.version,
ins=[
TxIn(txid=self.transaction_id,
txout=0,
script_sig=ScriptSig.empty(),
sequence=Sequence.max())
],
outs=[
TxOut(value=(amount - self._fee),
n=0,
script_pubkey=P2pkhScript.unhexlify(
hex_string=self.wallet.p2pkh()))
],
locktime=Locktime(locktime))
self._type = "bitcoin_refund_unsigned"
return self
def build_transaction(
self,
address: str,
transaction_hash: str,
locktime: int = config["locktime"]) -> "RefundTransaction":
"""
Build Bitcoin refund transaction.
:param address: Bitcoin sender address.
:type address: str
:param transaction_hash: Bitcoin funded transaction hash/id.
:type transaction_hash: str
:param locktime: Bitcoin transaction lock time, defaults to ``0``.
:type locktime: int
:returns: RefundTransaction -- Bitcoin refund transaction instance.
>>> from swap.providers.bitcoin.transaction import RefundTransaction
>>> refund_transaction: RefundTransaction = RefundTransaction("testnet")
>>> refund_transaction.build_transaction(address="n1wgm6kkzMcNfAtJmes8YhpvtDzdNhDY5a", transaction_hash="a211d21110756b266925fee2fbf2dc81529beef5e410311b38578dc3a076fb31")
<swap.providers.bitcoin.transaction.RefundTransaction object at 0x0409DAF0>
"""
# Check parameter instances
if not is_address(address, self._network):
raise AddressError(
f"Invalid Bitcoin sender '{address}' {self._network} address.")
# Set address and transaction_hash
self._address, self._transaction_hash, = address, transaction_hash
# Get transaction
self._transaction_detail = get_transaction(
transaction_hash=self._transaction_hash, network=self._network)
# Find HTLC UTXO
self._htlc_utxo = find_p2sh_utxo(transaction=self._transaction_detail)
if self._htlc_utxo is None:
raise ValueError(
"Invalid transaction id, there is no pay to script hash (P2SH) address."
)
self._amount = self._htlc_utxo["value"]
# Calculate the fee
self._fee = fee_calculator(1, 1)
outputs: list = [
TxOut(value=(self._amount - self._fee),
n=0,
script_pubkey=get_address_hash(address=self._address,
script=True))
]
# Build mutable transaction
self._transaction = MutableTransaction(
version=self._version,
ins=[
TxIn(txid=self._transaction_hash,
txout=self._htlc_utxo["position"],
script_sig=ScriptSig.empty(),
sequence=Sequence.max())
],
outs=outputs,
locktime=Locktime(locktime))
# Set transaction type
self._type = "bitcoin_refund_unsigned"
return self
def solve(self, *digests):
script_sig, witness = self.inner_solver.solve(*digests)
script_sig_data = script_sig.get_data()
script_sig_data.append(StackData.from_bytes(self.preimage))
return ScriptSig.from_stack_data(script_sig_data), witness
def solve(self, *digests):
script_sig, witness = self.inner_solver.solve(*digests)
script_sig_data = script_sig.get_data()
script_sig_data.append(StackData.from_int(self.branch.value))
return ScriptSig.from_stack_data(script_sig_data), witness
def solve(self, *digests):
from .transaction import Witness
script_sig, witness = self.witness_script_solver.solve(*digests)
return (ScriptSig.empty(),
(script_sig.to_witness() + witness +
Witness([self.get_prev_script().to_stack_data()])))
def solve(self, *digests):
script_sig, witness = self.redeem_script_solver.solve(*digests)
script_sig_data = script_sig.get_data()
script_sig_data.append(self.redeem_script.to_stack_data())
return ScriptSig.from_stack_data(script_sig_data), witness
def build_transaction(self,
transaction_id,
wallet,
amount,
secret=None,
locktime=0):
"""
Build bitcoin refund transaction.
:param transaction_id: bitcoin fund transaction id to redeem.
:type transaction_id: str
:param wallet: bitcoin sender wallet.
:type wallet: bitcoin.wallet.Wallet
:param amount: bitcoin amount to withdraw.
:type amount: int
:param secret: secret passphrase.
:type secret: str
:param locktime: bitcoin transaction lock time, defaults to 0.
:type locktime: int
:returns: RefundTransaction -- bitcoin refund transaction instance.
>>> from shuttle.providers.bitcoin.transaction import RefundTransaction
>>> refund_transaction = RefundTransaction(network="testnet")
>>> refund_transaction.build_transaction(fund_transaction_id, sender_wallet, 10000)
<shuttle.providers.bitcoin.transaction.RefundTransaction object at 0x0409DAF0>
"""
# Checking build transaction arguments instance
if not isinstance(transaction_id, str):
raise TypeError("invalid amount instance, only takes string type")
if not isinstance(wallet, Wallet):
raise TypeError(
"invalid wallet instance, only takes bitcoin Wallet class")
if secret is not None and not isinstance(secret, str):
raise TypeError("invalid secret instance, only takes string type")
# Setting transaction_id and wallet
self.transaction_id, self.wallet, self.secret = transaction_id, wallet, secret
# Getting transaction detail by id
self.transaction_detail = get_transaction_detail(self.transaction_id)
# Checking transaction outputs
if "outputs" not in self.transaction_detail:
raise NotFoundError("not found htlc in this %s hash" %
self.transaction_id)
# Hash time lock contract output
self.htlc = self.transaction_detail["outputs"][0]
# Sender account output
sender_address = P2pkhScript.unhexlify(
self.transaction_detail["outputs"][1]["script"]).address(
mainnet=self.mainnet)
self.sender_account = Wallet(network=self.network).from_address(
str(sender_address))
# HTLC info's
htlc_amount = self.htlc["value"]
htlc_script = P2shScript.unhexlify(self.htlc["script"])
# Calculating fee
self.fee = fee_calculator(1, 1)
if amount < self.fee:
raise BalanceError("insufficient spend utxos")
elif not htlc_amount >= (amount - self.fee):
raise BalanceError("insufficient spend utxos",
"maximum withdraw %d" % htlc_amount)
# Building mutable bitcoin transaction
self.transaction = MutableTransaction(
version=self.version,
ins=[
TxIn(txid=self.transaction_id,
txout=0,
script_sig=ScriptSig.empty(),
sequence=Sequence.max())
],
outs=[
TxOut(value=(amount - self.fee),
n=0,
script_pubkey=P2pkhScript.unhexlify(
self.sender_account.p2pkh()))
],
locktime=Locktime(locktime))
return self
penalty = int(float(to_spend.to_json()['vout'][0]['value']) * (10**8))
# 估算挖矿费用
print('estimating mining fee...')
mining_fee_per_kb = get_mining_fee_per_kb(coin_symbol,
api_key,
condidence='high')
estimated_tx_size = cal_tx_size_in_byte(inputs_num=1, outputs_num=1)
mining_fee = int(mining_fee_per_kb * (estimated_tx_size / 1000)) * 2
# 创建交易
unsigned = MutableTransaction(version=2,
ins=[
TxIn(txid=to_spend.txid,
txout=0,
script_sig=ScriptSig.empty(),
sequence=Sequence.max())
],
outs=[
TxOut(value=penalty - mining_fee,
n=0,
script_pubkey=script),
],
locktime=Locktime(0))
# 修改交易
signed = unsigned.spend([to_spend.outs[0]], [if_solver])
# 广播交易
print('open_tx_hex: ', signed.hexlify())
