def build_transaction(self, wallet, htlc, amount, locktime=0):
"""
Build bitcoin fund transaction.
:param wallet: bitcoin sender wallet.
:type wallet: bitcoin.wallet.Wallet
:param htlc: bitcoin hash time lock contract (HTLC).
:type htlc: bitcoin.htlc.HTLC
:param amount: bitcoin amount to fund.
:type amount: int
:param locktime: bitcoin transaction lock time, defaults to 0.
:type locktime: int
:returns: FundTransaction -- bitcoin fund transaction instance.
>>> from shuttle.providers.bitcoin.transaction import FundTransaction
>>> fund_transaction = FundTransaction(network="testnet")
>>> fund_transaction.build_transaction(sender_wallet, htlc, 10000)
<shuttle.providers.bitcoin.transaction.FundTransaction object at 0x0409DAF0>
"""
# Checking build transaction arguments instance
if not isinstance(wallet, Wallet):
raise TypeError(
"invalid wallet instance, only takes bitcoin Wallet class")
if not isinstance(htlc, HTLC):
raise TypeError(
"invalid htlc instance, only takes bitcoin HTLC class")
if not isinstance(amount, int):
raise TypeError("invalid amount instance, only takes integer type")
# Setting wallet, htlc, amount and unspent
self.wallet, self.htlc, self.amount = wallet, htlc, amount
# Getting unspent transaction output
self.unspent = self.wallet.unspent()
# Setting previous transaction indexes
self.previous_transaction_indexes = \
self.get_previous_transaction_indexes(amount=self.amount)
# Getting transaction inputs and amount
inputs, amount = self.inputs(self.unspent,
self.previous_transaction_indexes)
# Calculating bitcoin fee
self.fee = fee_calculator(len(inputs), 2)
if amount < (self.amount + self.fee):
raise BalanceError("insufficient spend utxos")
# Building mutable bitcoin transaction
self.transaction = MutableTransaction(
version=self.version,
ins=inputs,
outs=[
# Funding into hash time lock contract script hash
TxOut(value=self.amount,
n=0,
script_pubkey=P2shScript.unhexlify(self.htlc.hash())),
# Controlling amounts when we are funding on htlc script.
TxOut(value=amount - (self.fee + self.amount),
n=1,
script_pubkey=P2pkhScript.unhexlify(self.wallet.p2pkh()))
],
locktime=Locktime(locktime))
return self
def createContractOutput(outScriptA, outScriptB, valueA, valueB):
'''
PubScript=[TxOut(value=valueA,n=0,script_pubkey=P2pkhScript(pubkeyA))#outScriptA) or P2shScript(outScriptA)) #ToDo how to use OutScriptA, OutScriptB as pubkeys?
,TxOut(value=valueB,n=1,script_pubkey=P2pkhScript(pubkeyB))]#outScriptB)] or P2shScript(outScriptB))]# ToDO WORKS !!!
'''
PubScript = [
TxOut(value=valueA, n=0, script_pubkey=outScriptA),
TxOut(value=valueB, n=1, script_pubkey=outScriptB)
] #
#print ("Funding Output Script:" , PubScript[0].to_json(),"\n",PubScript[1].to_json())
return PubScript
def sign(self, solver):
"""
Sign bitcoin refund transaction.
:param solver: bitcoin refund solver.
:type solver: bitcoin.solver.RefundSolver
: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)
>>> refund_transaction.sign(refund_solver)
<shuttle.providers.bitcoin.transaction.RefundTransaction object at 0x0409DAF0>
"""
if not isinstance(solver, RefundSolver):
raise TypeError(
"invalid solver instance, only takes bitcoin RefundSolver class"
)
if self.transaction is None:
raise ValueError(
"transaction script is none, build transaction first")
htlc = HTLC(self.network).init(
secret_hash=sha256(solver.secret).hex(),
recipient_address=str(self.wallet.address()),
sender_address=str(self.sender_account.address()),
sequence=solver.sequence)
self.transaction.spend([
TxOut(value=self.htlc["value"],
n=0,
script_pubkey=P2shScript.unhexlify(self.htlc["script"]))
], [P2shSolver(htlc.script, solver.solve())])
return self
def _get_signed_txn(self, wif_keys):
""" :param wif_keys: list of wif keys corresponding with
self.input_addresses addresses, in same order
"""
# NB: they are not guaranteed to be in order as there
# may be more than one utxo associated with a single
# address, but there will always be 1 solver associated
# a private key
unordered_solvers = []
unordered_tx_outs = []
unsigned = self._txn
if self.is_signed:
raise ValueError('cannot sign txn (already signed)')
for key in wif_keys:
# create btcpy PrivateKeys from input WIF format keys
private_key = PrivateKey.from_wif(key)
if self.is_segwit:
pub_key = private_key.pub(compressed=True)
s_solver = P2shSolver(
P2wpkhV0Script(pub_key),
P2wpkhV0Solver(private_key)
)
unordered_solvers.append(s_solver)
else:
# create btcpy P2PKH Solvers from those PrivateKeys
unordered_solvers.append(P2pkhSolver(private_key))
# a dict that matches the addresses (which are ordered the same as
# their above WIF Keys) to their solvers
addresses_solvers = dict(zip(self.input_addresses, unordered_solvers))
# from self._specific_utxo_data, take the output num, value and scriptPubKey
# and create TxOuts representing the UTXO's that will be spent.
# In a tuple with the address of the UTXO so the correct solver
# can be found later
for t in self._specific_utxo_data:
unordered_tx_outs.append((t[2], TxOut(value=t[4], n=t[1], script_pubkey=Script.unhexlify(t[3]))))
# unlike the lists defined at the top of the method, these are in
# order i.e the solver in solvers[0] is the solver for the TxOut of
# tx_outs[0]. this is required to pass them into the spend() method
tx_outs = []
solvers = []
for t in unordered_tx_outs:
address = t[0]
tx_outs.append(t[1])
solvers.append(addresses_solvers[address])
signed = unsigned.spend(tx_outs, solvers)
return signed
def find_parent_outputs(provider: Provider, utxo: TxIn) -> TxOut:
'''due to design of the btcpy library, TxIn object must be converted to TxOut object before signing'''
network_params = net_query(provider.network)
index = utxo.txout # utxo index
return TxOut.from_json(provider.getrawtransaction(utxo.txid,
1)['vout'][index],
network=network_params)
def outputs(utxos, previous_transaction_indexes=None):
outputs = list()
for index, utxo in enumerate(utxos):
if previous_transaction_indexes is None or index in previous_transaction_indexes:
outputs.append(
TxOut(value=utxo["amount"], n=utxo["output_index"],
script_pubkey=Script.unhexlify(utxo["script"])))
return outputs
def tx_output(network: str, value: Decimal, n: int,
script: ScriptSig) -> TxOut:
'''create TxOut object'''
network_params = net_query(network)
return TxOut(network=network_params,
value=int(value * network_params.to_unit),
n=n, script_pubkey=script)
def from_json(cls, tx_json, network=PeercoinMainnet):
return cls(
version=tx_json['version'],
ins=[TxIn.from_json(txin_json) for txin_json in tx_json['vin']],
outs=[TxOut.from_json(txout_json) for txout_json in tx_json['vout']],
locktime=Locktime(tx_json['locktime']),
txid=tx_json['txid'],
network=network,
timestamp=tx_json['time'],
)
def spendCb(fee, reward, objTx, outputs, cbSolver, dictIdToPub):
"""
create a single coinbase spend
:param fee: fee
:param reward: block reward in sat
:param objTx: coinbase tx
:param outputs: lst of channels (copies from originals)
:param cbSolver: solver
:param bPubMiner: pub of the miner
:return: tx that spends coinbase
"""
outs = []
totVal = 0
chanIds = []
for o in outputs:
v = int(o.value)
bPubN1 = dictIdToPub[str(o.node1.nodeid)]
bPubN2 = dictIdToPub[str(o.node2.nodeid)]
if bPubN1.compressed < bPubN2.compressed: # lexicographical ordering
multisig_script = MultisigScript(2, bPubN1, bPubN2, 2)
else:
multisig_script = MultisigScript(2, bPubN2, bPubN1, 2)
p2wsh_multisig = P2wshV0Script(multisig_script)
totVal += v
outs += [TxOut(value=v, n=0, script_pubkey=p2wsh_multisig)]
chanIds += [o.channelid]
change = reward - totVal - fee
outsWithChange = outs + [
TxOut(value=change, n=0, script_pubkey=objTx.outs[0].script_pubkey)
]
unsignedCb = MutableTransaction(version=1,
ins=[
TxIn(txid=objTx.txid,
txout=0,
script_sig=ScriptSig.empty(),
sequence=Sequence.max())
],
outs=outsWithChange,
locktime=Locktime(0))
cbTx = unsignedCb.spend([objTx.outs[0]], [cbSolver])
return cbTx, (cbTx.txid, chanIds)
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 open_tx(committer, secret, commit_tx_hash):
# 创建输入脚本
p2pkh_solver = P2pkhSolver(committer.privk)
hasklock_solver = HashlockSolver(secret.encode(), p2pkh_solver)
if_solver = IfElseSolver(
Branch.IF, # branch selection
hasklock_solver)
# 创建输出脚本
script = P2pkhScript(committer.pubk)
# 获取commit交易
to_spend_raw = get_raw_tx(commit_tx_hash, coin_symbol)
to_spend = TransactionFactory.unhexlify(to_spend_raw)
# 获取罚金数额
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,
committer.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())
msg = pushtx(coin_symbol=coin_symbol,
api_key=committer.api_key,
tx_hex=signed.hexlify())
format_output(msg)
return msg['tx']['hash']
def _build_outputs(utxos: list,
previous_transaction_indexes: Optional[list] = None,
only_dict: bool = False) -> list:
outputs = []
for index, utxo in enumerate(utxos):
if previous_transaction_indexes is None or index in previous_transaction_indexes:
outputs.append(
TxOut(value=utxo["value"],
n=utxo["tx_output_n"],
script_pubkey=Script.unhexlify(
hex_string=utxo["script"]))
if not only_dict else dict(value=utxo["value"],
tx_output_n=utxo["tx_output_n"],
script=utxo["script"]))
return outputs
def sign(self, unsigned_raw, solver):
"""
Sign unsigned refund transaction raw.
:param unsigned_raw: bitcoin unsigned refund transaction raw.
:type unsigned_raw: str
:param solver: bitcoin refund solver.
:type solver: bitcoin.solver.RefundSolver
:returns: RefundSignature -- bitcoin refund signature instance.
>>> from shuttle.providers.bitcoin.signature import RefundSignature
>>> refund_signature = RefundSignature()
>>> refund_signature.sign(bitcoin_refund_unsigned, refund_solver)
<shuttle.providers.bitcoin.signature.RefundSignature object at 0x0409DAF0>
"""
tx_raw = json.loads(b64decode(str(unsigned_raw).encode()).decode())
if "raw" not in tx_raw or "outputs" not in tx_raw or "type" not in tx_raw or \
"recipient_address" not in tx_raw or "sender_address" not in tx_raw or "fee" not in tx_raw:
raise ValueError("invalid unsigned refund transaction raw")
self.fee = tx_raw["fee"]
self.type = tx_raw["type"]
if not self.type == "bitcoin_refund_unsigned":
raise TypeError("can't sign this %s transaction using RefundSignature" % tx_raw["type"])
if not isinstance(solver, RefundSolver):
raise Exception("invalid solver error, only refund solver")
htlc = HTLC(network=self.network).init(
secret_hash=sha256(solver.secret).hex(),
recipient_address=tx_raw["recipient_address"],
sender_address=tx_raw["sender_address"],
sequence=solver.sequence
)
output = TxOut(value=tx_raw["outputs"][0]["amount"], n=tx_raw["outputs"][0]["n"],
script_pubkey=P2shScript.unhexlify(tx_raw["outputs"][0]["script"]))
self.transaction = MutableTransaction.unhexlify(tx_raw["raw"])
self.transaction.spend([output], [
P2shSolver(htlc.script, solver.solve())
])
self.signed = b64encode(str(json.dumps(dict(
raw=self.transaction.hexlify(),
fee=tx_raw["fee"],
network=tx_raw["network"],
type="bitcoin_refund_signed"
))).encode()).decode()
return self
def sign(self, solver):
"""
Sign Bitcoin refund transaction.
:param solver: Bitcoin refund solver.
:type solver: bitcoin.solver.RefundSolver
:returns: RefundTransaction -- Bitcoin refund transaction instance.
>>> from swap.providers.bitcoin.transaction import RefundTransaction
>>> from swap.providers.bitcoin.solver import RefundSolver
>>> from swap.providers.bitcoin.wallet import Wallet
>>> sender_wallet = Wallet(network="testnet").from_passphrase("meherett1234")
>>> refund_solver = RefundSolver(sender_wallet.private_key(), "3a26da82ead15a80533a02696656b14b5dbfd84eb14790f2e1be5e9e45820eeb", "muTnffLDR5LtFeLR2i3WsKVfdyvzfyPnVB", sender_wallet.address(), 1000)
>>> refund_transaction = RefundTransaction(network="testnet")
>>> refund_transaction.build_transaction("1006a6f537fcc4888c65f6ff4f91818a1c6e19bdd3130f59391c00212c552fbd", sender_wallet, 10000)
>>> refund_transaction.sign(solver=refund_solver)
<swap.providers.bitcoin.transaction.RefundTransaction object at 0x0409DAF0>
"""
# Checking parameter instances
if not isinstance(solver, RefundSolver):
raise TypeError("invalid solver instance, only takes Bitcoin RefundSolver class")
if self.transaction is None:
raise ValueError("transaction script is none, build transaction first")
self.transaction.spend([
TxOut(
value=self.htlc_detail["value"],
n=0,
script_pubkey=P2shScript.unhexlify(
hex_string=self.htlc_detail["script"]
)
)
], [
P2shSolver(
redeem_script=solver.witness(
network=self.network
),
redeem_script_solver=solver.solve()
)
])
self._type = "bitcoin_refund_signed"
return self
def sign(self, solver):
"""
Sign Bitcoin claim transaction.
:param solver: Bitcoin claim solver.
:type solver: bitcoin.solver.ClaimSolver
:returns: ClaimTransaction -- Bitcoin claim transaction instance.
>>> from swap.providers.bitcoin.transaction import ClaimTransaction
>>> from swap.providers.bitcoin.solver import ClaimSolver
>>> from swap.providers.bitcoin.wallet import Wallet
>>> recipient_wallet = Wallet(network="testnet").from_passphrase("meherett")
>>> claim_solver = ClaimSolver(recipient_wallet.private_key(), "Hello Meheret!", "3a26da82ead15a80533a02696656b14b5dbfd84eb14790f2e1be5e9e45820eeb", recipient_wallet.address(), "mphBPZf15cRFcL5tUq6mCbE84XobZ1vg7Q", 1000)
>>> claim_transaction = ClaimTransaction(network="testnet")
>>> claim_transaction.build_transaction("1006a6f537fcc4888c65f6ff4f91818a1c6e19bdd3130f59391c00212c552fbd", recipient_wallet, 10000)
>>> claim_transaction.sign(solver=claim_solver)
<swap.providers.bitcoin.transaction.ClaimTransaction object at 0x0409DAF0>
"""
# Checking parameter instances
if not isinstance(solver, ClaimSolver):
raise TypeError("invalid solver instance, only takes Bitcoin ClaimSolver class")
if self.transaction is None:
raise ValueError("transaction script is none, build transaction first")
self.transaction.spend([
TxOut(
value=self.htlc_detail["value"],
n=0,
script_pubkey=P2shScript.unhexlify(
hex_string=self.htlc_detail["script"]
)
)
], [
P2shSolver(
redeem_script=solver.witness(
network=self.network
),
redeem_script_solver=solver.solve()
)
])
self._type = "bitcoin_claim_signed"
return self
def sign(self, solver: WithdrawSolver) -> "WithdrawTransaction":
"""
Sign Bitcoin withdraw transaction.
:param solver: Bitcoin withdraw solver.
:type solver: bitcoin.solver.WithdrawSolver
:returns: WithdrawTransaction -- Bitcoin withdraw transaction instance.
>>> from swap.providers.bitcoin.transaction import WithdrawTransaction
>>> from swap.providers.bitcoin.solver import WithdrawSolver
>>> withdraw_transaction: WithdrawTransaction = WithdrawTransaction("testnet")
>>> withdraw_transaction.build_transaction(address="mgS3WMHp9nvdUPeDJxr5iCF2P5HuFZSR3V", transaction_hash="a211d21110756b266925fee2fbf2dc81529beef5e410311b38578dc3a076fb31")
>>> bytecode: str = "63aa20821124b554d13f247b1e5d10b84e44fb1296f18f38bbaa1bea34a12c843e01588876a9140a0a6590e6ba4b48118d21b86812615219ece76b88ac67040ec4d660b17576a914e00ff2a640b7ce2d336860739169487a57f84b1588ac68"
>>> withdraw_solver: WithdrawSolver = WithdrawSolver(xprivate_key="tprv8ZgxMBicQKsPf949JcuVFLXPJ5m4VKe33gVX3FYVZYVHr2dChU8K66aEQcPdHpUgACq5GQu81Z4e3QN1vxCrV4pxcUcXHoRTamXBRaPdJhW", secret_key="Hello Meheret!", bytecode=bytecode)
>>> withdraw_transaction.sign(solver=withdraw_solver)
<swap.providers.bitcoin.transaction.WithdrawTransaction object at 0x0409DAF0>
"""
# Check parameter instances
if not isinstance(solver, WithdrawSolver):
raise TypeError(
f"Solver must be Bitcoin WithdrawSolver, not {type(solver).__name__} type."
)
if self._transaction is None:
raise ValueError("Transaction is none, build transaction first.")
self._transaction.spend([
TxOut(value=self._htlc_utxo["value"],
n=0,
script_pubkey=P2shScript.unhexlify(
hex_string=self._htlc_utxo["script"]))
], [
P2shSolver(
redeem_script=solver.witness(network=self._network),
redeem_script_solver=solver.solve(network=self._network))
])
# Set transaction type
self._type = "bitcoin_withdraw_signed"
return self
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 sign(self, solver: RefundSolver) -> "RefundTransaction":
"""
Sign Bitcoin refund transaction.
:param solver: Bitcoin refund solver.
:type solver: bitcoin.solver.RefundSolver
: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")
>>> bytecode: str = "63aa20821124b554d13f247b1e5d10b84e44fb1296f18f38bbaa1bea34a12c843e01588876a9140a0a6590e6ba4b48118d21b86812615219ece76b88ac67040ec4d660b17576a914e00ff2a640b7ce2d336860739169487a57f84b1588ac68"
>>> refund_solver: RefundSolver = RefundSolver(xprivate_key="tprv8ZgxMBicQKsPeMHMJAc6uWGYiGqi1MVM2ybmzXL2TAoDpQe85uyDpdT7mv7Nhdu5rTCBEKLZsd9KyP2LQZJzZTvgVQvENArgU8e6DoYBiXf", bytecode=bytecode, endtime=1624687630)
>>> refund_transaction.sign(solver=refund_solver)
<swap.providers.bitcoin.transaction.RefundTransaction object at 0x0409DAF0>
"""
# Check parameter instances
if not isinstance(solver, RefundSolver):
raise TypeError(
f"Solver must be Bitcoin RefundSolver, not {type(solver).__name__} type."
)
if self._transaction is None:
raise ValueError("Transaction is none, build transaction first.")
self._transaction.spend([
TxOut(value=self._htlc_utxo["value"],
n=0,
script_pubkey=P2shScript.unhexlify(
hex_string=self._htlc_utxo["script"]))
], [
P2shSolver(
redeem_script=solver.witness(network=self._network),
redeem_script_solver=solver.solve(network=self._network))
])
# Set transaction type
self._type = "bitcoin_refund_signed"
return self
def sign(self, unsigned_raw, solver):
"""
Sign unsigned fund transaction raw.
:param unsigned_raw: bitcoin unsigned fund transaction raw.
:type unsigned_raw: str
:param solver: bitcoin fund solver.
:type solver: bitcoin.solver.FundSolver
:returns: FundSignature -- bitcoin fund signature instance.
>>> from shuttle.providers.bitcoin.signature import FundSignature
>>> fund_signature = FundSignature()
>>> fund_signature.sign(bitcoin_fund_unsigned, fund_solver)
<shuttle.providers.bitcoin.signature.FundSignature object at 0x0409DAF0>
"""
tx_raw = json.loads(b64decode(str(unsigned_raw).encode()).decode())
if "raw" not in tx_raw or "outputs" not in tx_raw or "type" not in tx_raw or "fee" not in tx_raw:
raise ValueError("invalid unsigned fund transaction raw")
self.fee = tx_raw["fee"]
self.type = tx_raw["type"]
if not self.type == "bitcoin_fund_unsigned":
raise TypeError("can't sign this %s transaction using FundSignature" % tx_raw["type"])
if not isinstance(solver, FundSolver):
raise TypeError("invalid solver instance, only takes bitcoin FundSolver class")
self.transaction = MutableTransaction.unhexlify(tx_raw["raw"])
outputs = list()
for output in tx_raw["outputs"]:
outputs.append(
TxOut(value=output["amount"], n=output["n"],
script_pubkey=Script.unhexlify(output["script"])))
self.transaction.spend(outputs, [solver.solve() for _ in outputs])
self.signed = b64encode(str(json.dumps(dict(
raw=self.transaction.hexlify(),
fee=tx_raw["fee"],
network=tx_raw["network"],
type="bitcoin_fund_signed"
))).encode()).decode()
return self
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 sign(self, unsigned_raw, solver):
"""
Sign unsigned fund transaction raw.
:param unsigned_raw: Bitcoin unsigned fund transaction raw.
:type unsigned_raw: str
:param solver: Bitcoin fund solver.
:type solver: bitcoin.solver.FundSolver
:returns: FundSignature -- Bitcoin fund signature instance.
>>> from shuttle.providers.bitcoin.signature import FundSignature
>>> from shuttle.providers.bitcoin.solver import FundSolver
>>> bitcoin_fund_unsigned_raw = "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"
>>> fund_solver = FundSolver("92cbbc5990cb5090326a76feeb321cad01048635afe5756523bbf9f7a75bf38b")
>>> fund_signature = FundSignature(network="testnet")
>>> fund_signature.sign(bitcoin_fund_unsigned_raw, fund_solver)
<shuttle.providers.bitcoin.signature.FundSignature object at 0x0409DAF0>
"""
# Decoding and loading refund transaction
fund_transaction = json.loads(
b64decode(
str(unsigned_raw + "=" *
(-len(unsigned_raw) % 4)).encode()).decode())
# Checking refund transaction keys
for key in ["raw", "outputs", "type", "fee", "network"]:
if key not in fund_transaction:
raise ValueError(
"invalid Bitcoin unsigned fund transaction raw")
if not fund_transaction["type"] == "bitcoin_fund_unsigned":
raise TypeError(
f"invalid Bitcoin fund unsigned transaction type, "
f"you can't sign this {fund_transaction['type']} type by using FundSignature"
)
if not isinstance(solver, FundSolver):
raise TypeError(
"invalid Bitcoin solver, it's only takes Bitcoin FundSolver class"
)
# Setting transaction fee, type, network and transaction
self._fee, self._type, self.network, self.transaction = (
fund_transaction["fee"], fund_transaction["type"],
fund_transaction["network"],
MutableTransaction.unhexlify(fund_transaction["raw"]))
# Organizing outputs
outputs = []
for output in fund_transaction["outputs"]:
outputs.append(
TxOut(value=output["amount"],
n=output["n"],
script_pubkey=Script.unhexlify(
hex_string=output["script"])))
# Signing fund transaction
self.transaction.spend(outputs, [solver.solve() for _ in outputs])
# Encoding fund transaction raw
self._type = "bitcoin_fund_signed"
self._signed_raw = b64encode(
str(
json.dumps(
dict(raw=self.transaction.hexlify(),
fee=fund_transaction["fee"],
network=fund_transaction["network"],
type=self._type))).encode()).decode()
return self
def sign(self, transaction_raw: str, solver: RefundSolver) -> "RefundSignature":
"""
Sign unsigned refund transaction raw.
:param transaction_raw: Bitcoin unsigned refund transaction raw.
:type transaction_raw: str
:param solver: Bitcoin refund solver.
:type solver: bitcoin.solver.RefundSolver
:returns: RefundSignature -- Bitcoin refund signature instance.
>>> from swap.providers.bitcoin.signature import Signature
>>> from swap.providers.bitcoin.solver import RefundSolver
>>> unsigned_refund_transaction_raw: str = "eyJmZWUiOiA1NzYsICJyYXciOiAiMDIwMDAwMDAwMTMxZmI3NmEwYzM4ZDU3MzgxYjMxMTBlNGY1ZWU5YjUyODFkY2YyZmJlMmZlMjU2OTI2NmI3NTEwMTFkMjExYTIwMDAwMDAwMDAwZmZmZmZmZmYwMTYwODQwMTAwMDAwMDAwMDAxOTc2YTkxNGUwMGZmMmE2NDBiN2NlMmQzMzY4NjA3MzkxNjk0ODdhNTdmODRiMTU4OGFjMDAwMDAwMDAiLCAib3V0cHV0cyI6IHsidmFsdWUiOiAxMDAwMDAsICJ0eF9vdXRwdXRfbiI6IDAsICJzY3JpcHQiOiAiYTkxNGM4Yzc3YTliNDNlZTJiZGYxYTA3YzQ4Njk5ODMzZDc2NjhiZjI2NGM4NyJ9LCAibmV0d29yayI6ICJ0ZXN0bmV0IiwgInR5cGUiOiAiYml0Y29pbl9yZWZ1bmRfdW5zaWduZWQifQ"
>>> bytecode: str = "63aa20821124b554d13f247b1e5d10b84e44fb1296f18f38bbaa1bea34a12c843e01588876a9140a0a6590e6ba4b48118d21b86812615219ece76b88ac67040ec4d660b17576a914e00ff2a640b7ce2d336860739169487a57f84b1588ac68"
>>> refund_solver: RefundSolver = RefundSolver(xprivate_key="tprv8ZgxMBicQKsPeMHMJAc6uWGYiGqi1MVM2ybmzXL2TAoDpQe85uyDpdT7mv7Nhdu5rTCBEKLZsd9KyP2LQZJzZTvgVQvENArgU8e6DoYBiXf", bytecode=bytecode, endtime=1624687630)
>>> refund_signature: RefundSignature = RefundSignature(network="testnet")
>>> refund_signature.sign(transaction_raw=unsigned_refund_transaction_raw, solver=refund_solver)
<swap.providers.bitcoin.signature.RefundSignature object at 0x0409DAF0>
"""
if not is_transaction_raw(transaction_raw=transaction_raw):
raise TransactionRawError("Invalid Bitcoin unsigned transaction raw.")
transaction_raw = clean_transaction_raw(transaction_raw)
decoded_transaction_raw = b64decode(transaction_raw.encode())
loaded_transaction_raw = json.loads(decoded_transaction_raw.decode())
if not loaded_transaction_raw["type"] == "bitcoin_refund_unsigned":
raise TypeError(f"Invalid Bitcoin refund unsigned transaction raw type, "
f"you can't sign {loaded_transaction_raw['type']} type by using refund signature.")
# Check parameter instances
if not isinstance(solver, RefundSolver):
raise TypeError(f"Solver must be Bitcoin RefundSolver, not {type(solver).__name__} type.")
# Set transaction fee, type, network and transaction
self._fee, self._type, self._network, self._transaction = (
loaded_transaction_raw["fee"], loaded_transaction_raw["type"],
loaded_transaction_raw["network"], MutableTransaction.unhexlify(loaded_transaction_raw["raw"])
)
# Sign refund transaction
self._transaction.spend([TxOut(
value=loaded_transaction_raw["outputs"]["value"],
n=loaded_transaction_raw["outputs"]["tx_output_n"],
script_pubkey=P2shScript.unhexlify(
hex_string=loaded_transaction_raw["outputs"]["script"]
)
)], [P2shSolver(
redeem_script=solver.witness(
network=self._network
),
redeem_script_solver=solver.solve(
network=self._network
)
)])
# Encode refund transaction raw
self._type = "bitcoin_refund_signed"
self._signed_raw = b64encode(str(json.dumps(dict(
raw=self._transaction.hexlify(),
fee=self._fee,
network=self._network,
type=self._type,
))).encode()).decode()
return self
def sign(self, transaction_raw: str, solver: WithdrawSolver) -> "WithdrawSignature":
"""
Sign unsigned withdraw transaction raw.
:param transaction_raw: Bitcoin unsigned withdraw transaction raw.
:type transaction_raw: str
:param solver: Bitcoin withdraw solver.
:type solver: bitcoin.solver.WithdrawSolver
:returns: WithdrawSignature -- Bitcoin withdraw signature instance.
>>> from swap.providers.bitcoin.signature import WithdrawSignature
>>> from swap.providers.bitcoin.solver import WithdrawSolver
>>> unsigned_withdraw_transaction_raw: str = "eyJmZWUiOiA1NzYsICJyYXciOiAiMDIwMDAwMDAwMTMxZmI3NmEwYzM4ZDU3MzgxYjMxMTBlNGY1ZWU5YjUyODFkY2YyZmJlMmZlMjU2OTI2NmI3NTEwMTFkMjExYTIwMDAwMDAwMDAwZmZmZmZmZmYwMTYwODQwMTAwMDAwMDAwMDAxOTc2YTkxNDBhMGE2NTkwZTZiYTRiNDgxMThkMjFiODY4MTI2MTUyMTllY2U3NmI4OGFjMDAwMDAwMDAiLCAib3V0cHV0cyI6IHsidmFsdWUiOiAxMDAwMDAsICJ0eF9vdXRwdXRfbiI6IDAsICJzY3JpcHQiOiAiYTkxNGM4Yzc3YTliNDNlZTJiZGYxYTA3YzQ4Njk5ODMzZDc2NjhiZjI2NGM4NyJ9LCAibmV0d29yayI6ICJ0ZXN0bmV0IiwgInR5cGUiOiAiYml0Y29pbl93aXRoZHJhd191bnNpZ25lZCJ9"
>>> bytecode: str = "63aa20821124b554d13f247b1e5d10b84e44fb1296f18f38bbaa1bea34a12c843e01588876a9140a0a6590e6ba4b48118d21b86812615219ece76b88ac67040ec4d660b17576a914e00ff2a640b7ce2d336860739169487a57f84b1588ac68"
>>> withdraw_solver: WithdrawSolver = WithdrawSolver(xprivate_key="tprv8ZgxMBicQKsPf949JcuVFLXPJ5m4VKe33gVX3FYVZYVHr2dChU8K66aEQcPdHpUgACq5GQu81Z4e3QN1vxCrV4pxcUcXHoRTamXBRaPdJhW", secret_key="Hello Meheret!", bytecode=bytecode)
>>> withdraw_signature: WithdrawSignature = WithdrawSignature(network="testnet")
>>> withdraw_signature.sign(transaction_raw=unsigned_withdraw_transaction_raw, solver=withdraw_solver)
<swap.providers.bitcoin.signature.WithdrawSignature object at 0x0409DAF0>
"""
if not is_transaction_raw(transaction_raw=transaction_raw):
raise TransactionRawError("Invalid Bitcoin unsigned transaction raw.")
transaction_raw = clean_transaction_raw(transaction_raw)
decoded_transaction_raw = b64decode(transaction_raw.encode())
loaded_transaction_raw = json.loads(decoded_transaction_raw.decode())
if not loaded_transaction_raw["type"] == "bitcoin_withdraw_unsigned":
raise TypeError(f"Invalid Bitcoin withdraw unsigned transaction raw type, "
f"you can't sign {loaded_transaction_raw['type']} type by using withdraw signature.")
# Check parameter instances
if not isinstance(solver, WithdrawSolver):
raise TypeError(f"Solver must be Bitcoin WithdrawSolver, not {type(solver).__name__} type.")
# Set transaction fee, type, network and transaction
self._fee, self._type, self._network, self._transaction = (
loaded_transaction_raw["fee"], loaded_transaction_raw["type"],
loaded_transaction_raw["network"], MutableTransaction.unhexlify(loaded_transaction_raw["raw"])
)
# Sign withdraw transaction
self._transaction.spend([TxOut(
value=loaded_transaction_raw["outputs"]["value"],
n=loaded_transaction_raw["outputs"]["tx_output_n"],
script_pubkey=P2shScript.unhexlify(
hex_string=loaded_transaction_raw["outputs"]["script"]
)
)], [P2shSolver(
redeem_script=solver.witness(
network=self._network
),
redeem_script_solver=solver.solve(
network=self._network
)
)])
# Encode withdraw transaction raw
self._type = "bitcoin_withdraw_signed"
self._signed_raw = b64encode(str(json.dumps(dict(
raw=self._transaction.hexlify(),
fee=self._fee,
network=self._network,
type=self._type,
))).encode()).decode()
return self
def sign(self, transaction_raw: str, solver: FundSolver) -> "FundSignature":
"""
Sign unsigned fund transaction raw.
:param transaction_raw: Bitcoin unsigned fund transaction raw.
:type transaction_raw: str
:param solver: Bitcoin fund solver.
:type solver: bitcoin.solver.FundSolver
:returns: FundSignature -- Bitcoin fund signature instance.
>>> from swap.providers.bitcoin.signature import FundSignature
>>> from swap.providers.bitcoin.solver import FundSolver
>>> unsigned_fund_transaction_raw: str = "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"
>>> fund_solver: FundSolver = FundSolver(xprivate_key="tprv8ZgxMBicQKsPeMHMJAc6uWGYiGqi1MVM2ybmzXL2TAoDpQe85uyDpdT7mv7Nhdu5rTCBEKLZsd9KyP2LQZJzZTvgVQvENArgU8e6DoYBiXf")
>>> fund_signature: FundSignature = FundSignature(network="testnet")
>>> fund_signature.sign(transaction_raw=unsigned_fund_transaction_raw, solver=fund_solver)
<swap.providers.bitcoin.signature.FundSignature object at 0x0409DAF0>
"""
if not is_transaction_raw(transaction_raw=transaction_raw):
raise TransactionRawError("Invalid Bitcoin unsigned transaction raw.")
transaction_raw = clean_transaction_raw(transaction_raw)
decoded_transaction_raw = b64decode(transaction_raw.encode())
loaded_transaction_raw = json.loads(decoded_transaction_raw.decode())
if not loaded_transaction_raw["type"] == "bitcoin_fund_unsigned":
raise TypeError(f"Invalid Bitcoin fund unsigned transaction raw type, "
f"you can't sign {loaded_transaction_raw['type']} type by using fund signature.")
# Check parameter instances
if not isinstance(solver, FundSolver):
raise TypeError(f"Solver must be Bitcoin FundSolver, not {type(solver).__name__} type.")
# Set transaction fee, type, network and transaction
self._fee, self._type, self._network, self._transaction = (
loaded_transaction_raw["fee"], loaded_transaction_raw["type"],
loaded_transaction_raw["network"], MutableTransaction.unhexlify(loaded_transaction_raw["raw"])
)
# Organize outputs
outputs = []
for output in loaded_transaction_raw["outputs"]:
outputs.append(TxOut(
value=output["value"],
n=output["tx_output_n"],
script_pubkey=Script.unhexlify(
hex_string=output["script"]
)
))
# Sign fund transaction
self._transaction.spend(
txouts=outputs,
solvers=[solver.solve(network=self._network) for _ in outputs]
)
# Encode fund transaction raw
self._type = "bitcoin_fund_signed"
self._signed_raw = b64encode(str(json.dumps(dict(
raw=self._transaction.hexlify(),
fee=self._fee,
network=self._network,
type=self._type
))).encode()).decode()
return self
def test_all(self):
global keys
priv = PrivateKey.from_bip32(keys[0][1])
pk = priv.pub()
addr_string = str(pk.to_address())
utxo = []
for i in range(3):
# create 3 tx to add to UTXO
txid = regtest.send_rpc_cmd(['sendtoaddress', addr_string, '100'],
0)
to_spend = Transaction.unhexlify(
regtest.send_rpc_cmd(['getrawtransaction', txid, '0'], 0))
txout = None
for out in to_spend.outs:
if str(out.script_pubkey.address()) == addr_string:
txout = out
break
assert txout is not None
utxo.append({
'txid': txid,
'txout': txout,
'solver': P2pkhSolver(priv),
'next_seq': Sequence.max(),
'next_locktime': Locktime(0)
})
regtest.send_rpc_cmd(['generate', '100'], 0)
generate = False
next_locktime = Locktime(0)
next_sequence = Sequence.max()
i = 0 # 1785 # 382 # 2376 # 1180 #
while i < len(self.all) - 2:
print('{:04d}\r'.format(i), end='')
ins = [
MutableTxIn(unspent['txid'], unspent['txout'].n,
ScriptSig.empty(), unspent['next_seq'])
for unspent in utxo
]
outs = []
prev_types = []
for j, (unspent, script) in enumerate(zip(utxo,
self.all[i:i + 3])):
outs.append(
TxOut(unspent['txout'].value - 1000000, j, script[0]))
prev_types.append(script[2])
tx = MutableTransaction(
2, ins, outs,
min_locktime(unspent['next_locktime'] for unspent in utxo))
tx = tx.spend([unspent['txout'] for unspent in utxo],
[unspent['solver'] for unspent in utxo])
# print('====================')
# print('txid: {}'.format(tx.txid))
# print()
# print(tx)
# print()
# print('raw: {}'.format(tx.hexlify()))
# print('prev_scripts, amounts, solvers:')
for unspent in utxo:
if isinstance(unspent['solver'], P2shSolver):
if isinstance(unspent['solver'].redeem_script_solver,
P2wshV0Solver):
prev = unspent[
'solver'].redeem_script_solver.witness_script
else:
prev = unspent['solver'].redeem_script
elif isinstance(unspent['solver'], P2wshV0Solver):
prev = unspent['solver'].witness_script
else:
prev = unspent['txout'].script_pubkey
print(prev, unspent['txout'].value,
unspent['solver'].__class__.__name__)
regtest.send_rpc_cmd(['sendrawtransaction', tx.hexlify()], 0)
utxo = []
for j, (output, prev_type) in enumerate(zip(tx.outs, prev_types)):
if 'time' in prev_type:
if 'absolute' in prev_type:
next_locktime = Locktime(100)
next_sequence = Sequence(0xfffffffe)
if 'relative' in prev_type:
next_sequence = Sequence(3)
generate = True
else:
next_locktime = Locktime(0)
next_sequence = Sequence.max()
utxo.append({
'txid': tx.txid,
'txout': output,
'solver': self.all[i + j][1][0], # solver
'next_seq': next_sequence,
'next_locktime': next_locktime
})
if generate:
regtest.send_rpc_cmd(['generate', '4'], 0)
generate = False
if not i % 10:
regtest.send_rpc_cmd(['generate', '2'], 0)
i += 1
ins = [
MutableTxIn(unspent['txid'], unspent['txout'].n, ScriptSig.empty(),
unspent['next_seq']) for unspent in utxo
]
tx = MutableTransaction(
2, ins, [
TxOut(
sum(unspent['txout'].value for unspent in utxo) - 1000000,
0, self.final['script'])
], min_locktime(unspent['next_locktime'] for unspent in utxo))
tx = tx.spend([unspent['txout'] for unspent in utxo],
[unspent['solver'] for unspent in utxo])
# print('====================')
# print('txid: {}'.format(tx.txid))
# print()
# print(tx)
# print()
# print('raw: {}'.format(tx.hexlify()))
# print('prev_scripts, amounts, solvers:')
for unspent in utxo:
print(unspent['txout'].script_pubkey, unspent['txout'].value,
unspent['solver'].__class__.__name__)
regtest.send_rpc_cmd(['sendrawtransaction', tx.hexlify()], 0)
regtest.teardown()
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, wallet, htlc, amount, locktime=0):
"""
Build Bitcoin fund transaction.
:param wallet: Bitcoin sender wallet.
:type wallet: bitcoin.wallet.Wallet
:param htlc: Bitcoin hash time lock contract (HTLC).
:type htlc: bitcoin.htlc.HTLC
:param amount: Bitcoin amount to fund.
:type amount: int
:param locktime: Bitcoin transaction lock time, defaults to 0.
:type locktime: int
:returns: FundTransaction -- Bitcoin fund transaction instance.
>>> from shuttle.providers.bitcoin.htlc import HTLC
>>> from shuttle.providers.bitcoin.transaction import FundTransaction
>>> from shuttle.providers.bitcoin.wallet import Wallet
>>> htlc = HTLC(network="testnet").init("821124b554d13f247b1e5d10b84e44fb1296f18f38bbaa1bea34a12c843e0158", "muTnffLDR5LtFeLR2i3WsKVfdyvzfyPnVB", "mphBPZf15cRFcL5tUq6mCbE84XobZ1vg7Q", 1000)
>>> sender_wallet = Wallet(network="testnet").from_passphrase("meherett")
>>> fund_transaction = FundTransaction(network="testnet")
>>> fund_transaction.build_transaction(wallet=sender_wallet, htlc=htlc, amount=10000)
<shuttle.providers.bitcoin.transaction.FundTransaction object at 0x0409DAF0>
"""
# Checking parameter instances
if not isinstance(wallet, Wallet):
raise TypeError(
"invalid wallet instance, only takes Bitcoin Wallet class")
if not isinstance(htlc, HTLC):
raise TypeError(
"invalid htlc instance, only takes Bitcoin HTLC class")
if not isinstance(amount, int):
raise TypeError("invalid amount instance, only takes integer type")
# Setting wallet, htlc, amount and unspent
self.wallet, self.htlc, self.amount = wallet, htlc, amount
# Getting unspent transaction output
self.unspent = self.wallet.unspent()
# Setting previous transaction indexes
self.previous_transaction_indexes = \
self.get_previous_transaction_indexes(amount=self.amount)
# Getting transaction inputs and amount
inputs, amount = self.inputs(
utxos=self.unspent,
previous_transaction_indexes=self.previous_transaction_indexes)
# Calculating Bitcoin fee
self._fee = fee_calculator(len(inputs), 2)
if amount < (self.amount + self._fee):
raise BalanceError("insufficient spend utxos")
# Building mutable Bitcoin transaction
self.transaction = MutableTransaction(
version=self.version,
ins=inputs,
outs=[
# Funding into hash time lock contract script hash
TxOut(value=self.amount,
n=0,
script_pubkey=P2shScript.unhexlify(
hex_string=self.htlc.hash())),
# Controlling amounts when we are funding on htlc script
TxOut(value=(amount - (self._fee + self.amount)),
n=1,
script_pubkey=P2pkhScript.unhexlify(
hex_string=self.wallet.p2pkh()))
],
locktime=Locktime(locktime))
self._type = "bitcoin_fund_unsigned"
return self
def sign(self, unsigned_raw, solver):
"""
Sign unsigned refund transaction raw.
:param unsigned_raw: Bitcoin unsigned refund transaction raw.
:type unsigned_raw: str
:param solver: Bitcoin refund solver.
:type solver: bitcoin.solver.RefundSolver
:returns: RefundSignature -- Bitcoin refund signature instance.
>>> from shuttle.providers.bitcoin.signature import RefundSignature
>>> from shuttle.providers.bitcoin.solver import RefundSolver
>>> bitcoin_refund_unsigned_raw = "eyJmZWUiOiA1NzYsICJyYXciOiAiMDIwMDAwMDAwMTUyYzIzZGM2NDU2N2IxY2ZhZjRkNzc2NjBjNzFjNzUxZjkwZTliYTVjMzc0N2ZhYzFkMDA1MTgwOGVhMGQ2NTEwMDAwMDAwMDAwZmZmZmZmZmYwMTQ4MTEwMDAwMDAwMDAwMDAxOTc2YTkxNDY0YTgzOTBiMGIxNjg1ZmNiZjJkNGI0NTcxMThkYzhkYTkyZDU1MzQ4OGFjMDAwMDAwMDAiLCAib3V0cHV0cyI6IHsidmFsdWUiOiA1MDAwLCAibiI6IDAsICJzY3JpcHRfcHVia2V5IjogImE5MTQ0MzNlOGVkNTliOWE2N2YwZjE4N2M2M2ViNDUwYjBkNTZlMjU2ZWMyODcifSwgIm5ldHdvcmsiOiAidGVzdG5ldCIsICJ0eXBlIjogImJpdGNvaW5fcmVmdW5kX3Vuc2lnbmVkIn0"
>>> refund_solver = RefundSolver("92cbbc5990cb5090326a76feeb321cad01048635afe5756523bbf9f7a75bf38b", "3a26da82ead15a80533a02696656b14b5dbfd84eb14790f2e1be5e9e45820eeb", "muTnffLDR5LtFeLR2i3WsKVfdyvzfyPnVB", "mphBPZf15cRFcL5tUq6mCbE84XobZ1vg7Q", 1000)
>>> refund_signature = RefundSignature(network="testnet")
>>> refund_signature.sign(unsigned_raw=bitcoin_refund_unsigned_raw, solver=refund_solver)
<shuttle.providers.bitcoin.signature.RefundSignature object at 0x0409DAF0>
"""
# Decoding and loading refund transaction
refund_transaction = json.loads(
b64decode(
str(unsigned_raw + "=" *
(-len(unsigned_raw) % 4)).encode()).decode())
# Checking refund transaction keys
for key in ["raw", "outputs", "type", "fee", "network"]:
if key not in refund_transaction:
raise ValueError(
"invalid Bitcoin unsigned refund transaction raw")
if not refund_transaction["type"] == "bitcoin_refund_unsigned":
raise TypeError(
f"invalid Bitcoin refund unsigned transaction type, "
f"you can't sign this {refund_transaction['type']} type by using RefundSignature"
)
if not isinstance(solver, RefundSolver):
raise TypeError(
"invalid Bitcoin solver, it's only takes Bitcoin RefundSolver class"
)
# Setting transaction fee, type, network and transaction
self._fee, self._type, self.network, self.transaction = (
refund_transaction["fee"], refund_transaction["type"],
refund_transaction["network"],
MutableTransaction.unhexlify(refund_transaction["raw"]))
# Signing refund transaction
self.transaction.spend([
TxOut(
value=refund_transaction["outputs"]["value"],
n=refund_transaction["outputs"]["n"],
script_pubkey=P2shScript.unhexlify(
hex_string=refund_transaction["outputs"]["script_pubkey"]))
], [
P2shSolver(redeem_script=solver.witness(
network=refund_transaction["network"]),
redeem_script_solver=solver.solve())
])
# Encoding refund transaction raw
self._type = "bitcoin_refund_signed"
self._signed_raw = b64encode(
str(
json.dumps(
dict(raw=self.transaction.hexlify(),
fee=refund_transaction["fee"],
network=refund_transaction["network"],
type=self._type))).encode()).decode()
return self
def test_all(self):
global keys
priv = ExtendedPrivateKey.decode(keys[0][1]).key
pk = priv.pub()
addr_string = str(pk.to_address())
utxo = []
for i in range(3):
# create 3 tx to add to UTXO
txid = regtest.send_rpc_cmd(['sendtoaddress', addr_string, '100'],
0)
to_spend = Transaction.unhexlify(
regtest.send_rpc_cmd(['getrawtransaction', txid, '0'], 0))
txout = None
for out in to_spend.outs:
if str(out.script_pubkey.address()) == addr_string:
txout = out
break
assert txout is not None
utxo.append({
'txid': txid,
'txout': txout,
'solver': P2pkhSolver(priv),
'next_seq': Sequence.max(),
'next_locktime': Locktime(0)
})
regtest.send_rpc_cmd(['generate', '100'], 0)
generate = False
next_locktime = Locktime(0)
next_sequence = Sequence.max()
i = 0
while i < len(self.all) - 2:
print('{:04d}\r'.format(i), end='', flush=True)
ins = [
MutableTxIn(unspent['txid'], unspent['txout'].n,
ScriptSig.empty(), unspent['next_seq'])
for unspent in utxo
]
outs = []
prev_types = []
for j, (unspent, script) in enumerate(zip(utxo,
self.all[i:i + 3])):
outs.append(
TxOut(unspent['txout'].value - 1000000, j, script[0]))
prev_types.append(script[2])
tx = MutableTransaction(
2, ins, outs,
min_locktime(unspent['next_locktime'] for unspent in utxo))
mutable = copy.deepcopy(tx)
tx = tx.spend([unspent['txout'] for unspent in utxo],
[unspent['solver'] for unspent in utxo])
# print('====================')
# print('txid: {}'.format(tx.txid))
# print()
# print(tx)
# print()
# print('raw: {}'.format(tx.hexlify()))
# print('prev_scripts, amounts, solvers:')
print('TX: {}'.format(i))
regtest.send_rpc_cmd(['sendrawtransaction', tx.hexlify()], 0)
print('Mempool size: {}'.format(
len(regtest.send_rpc_cmd(['getrawmempool'], 0))))
if cmdline_args.dumpfile is not None:
with open(cmdline_args.dumpfile, 'a') as out:
for j, unspent in enumerate(utxo):
json.dump(
self.json_dump(unspent, tx.ins[j], j,
copy.deepcopy(mutable).to_segwit()),
out)
out.write('\n')
utxo = []
for j, (output, prev_type) in enumerate(zip(tx.outs, prev_types)):
if 'time' in prev_type:
if 'absolute' in prev_type:
next_locktime = Locktime(100)
next_sequence = Sequence(0xfffffffe)
if 'relative' in prev_type:
next_sequence = Sequence(3)
generate = True
else:
next_locktime = Locktime(0)
next_sequence = Sequence.max()
utxo.append({
'txid': tx.txid,
'txout': output,
'solver': self.all[i + j][1][0], # solver
'next_seq': next_sequence,
'next_locktime': next_locktime
})
if generate:
regtest.send_rpc_cmd(['generate', '4'], 0)
generate = False
if not i % 10:
print('generating 2')
regtest.send_rpc_cmd(['generate', '2'], 0)
i += 1
ins = [
MutableTxIn(unspent['txid'], unspent['txout'].n, ScriptSig.empty(),
unspent['next_seq']) for unspent in utxo
]
tx = MutableTransaction(
2, ins, [
TxOut(
sum(unspent['txout'].value for unspent in utxo) - 1000000,
0, self.final['script'])
], min_locktime(unspent['next_locktime'] for unspent in utxo))
tx = tx.spend([unspent['txout'] for unspent in utxo],
[unspent['solver'] for unspent in utxo])
# print('====================')
# print('txid: {}'.format(tx.txid))
# print()
# print(tx)
# print()
# print('raw: {}'.format(tx.hexlify()))
# print('prev_scripts, amounts, solvers:')
# for unspent in utxo:
# print(unspent['txout'].script_pubkey, unspent['txout'].value, unspent['solver'].__class__.__name__)
regtest.send_rpc_cmd(['sendrawtransaction', tx.hexlify()], 0)
regtest.teardown()
assert penalty + mining_fee <= balance, 'committer账户余额不足'
# 创建交易
to_spend_raw = get_raw_tx(to_spend_hash, coin_symbol)
to_spend = TransactionFactory.unhexlify(to_spend_raw)
unsigned = MutableTransaction(version=2,
ins=[
TxIn(txid=to_spend.txid,
txout=0,
script_sig=ScriptSig.empty(),
sequence=Sequence.max())
],
outs=[
TxOut(value=penalty,
n=0,
script_pubkey=lock_time_script),
TxOut(value=balance - penalty - mining_fee,
n=1,
script_pubkey=change_script)
],
locktime=Locktime(0))
# 输入脚本
solver = P2pkhSolver(privk)
# 修改交易
signed = unsigned.spend([to_spend.outs[0]], [solver])
print('commit_tx_hex: ', signed.hexlify())
# 发送交易
from blockcypher import pushtx
