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 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 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()
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
tx = pushtx(coin_symbol=coin_symbol, api_key=api_key, tx_hex=signed.hexlify())
format_output(tx)
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()
class RefundTransaction(Transaction):
"""
Bitcoin RefundTransaction class.
:param version: Bitcoin transaction version, defaults to 2.
:type version: int
:param network: Bitcoin network, defaults to testnet.
:type network: str
:returns: Transaction -- Bitcoin transaction instance.
.. warning::
Do not forget to build transaction after initialize refund transaction.
"""
# Initialization claim transaction
def __init__(self, version=2, network="testnet"):
super().__init__(version=version, network=network)
# Initialization transaction_id, sender wallet and amount
self.transaction_id, self.wallet, \
self.amount = None, None, None
# Get transaction detail
self.transaction_detail = None
# Transaction detail outputs (HTLC and Sender account)
self.htlc_detail, self.sender_detail = None, None
# Building transaction
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
# Signing refund transaction
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
>>> from shuttle.providers.bitcoin.solver import RefundSolver
>>> from shuttle.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)
<shuttle.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 unsigned_raw(self):
"""
Get Bitcoin unsigned refund transaction raw.
:returns: str -- Bitcoin unsigned refund transaction raw.
>>> from shuttle.providers.bitcoin.transaction import RefundTransaction
>>> from shuttle.providers.bitcoin.wallet import Wallet
>>> sender_wallet = Wallet(network="testnet").from_passphrase("meherett1234")
>>> refund_transaction = RefundTransaction(network="testnet")
>>> refund_transaction.build_transaction("1006a6f537fcc4888c65f6ff4f91818a1c6e19bdd3130f59391c00212c552fbd", sender_wallet, 10000)
>>> refund_transaction.unsigned_raw()
"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"
"""
# Checking transaction
if self.transaction is None:
raise ValueError(
"transaction script is none, build transaction first")
# Encoding refund transaction raw
return b64encode(
str(
json.dumps(
dict(fee=self._fee,
raw=self.transaction.hexlify(),
outputs=dict(
value=self.htlc_detail["value"],
n=0,
script_pubkey=self.htlc_detail["script"]),
network=self.network,
type="bitcoin_refund_unsigned"))).encode()).decode()
class FundTransaction(Transaction):
"""
Bitcoin FundTransaction class.
:param version: Bitcoin transaction version, defaults to 2.
:type version: int
:param network: Bitcoin network, defaults to testnet.
:type network: str
:returns: FundTransaction -- Bitcoin fund transaction instance.
.. warning::
Do not forget to build transaction after initialize fund transaction.
"""
# Initialization fund transaction
def __init__(self, version=2, network="testnet"):
super().__init__(version=version, network=network)
# Initialization wallet, htlc, amount and unspent
self.wallet, self.htlc, self.amount, self.unspent = None, None, None, None
# Getting previous transaction indexes using funding amount
self.previous_transaction_indexes = None
# Building transaction
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
# Signing fund transaction
def sign(self, solver):
"""
Sign Bitcoin fund transaction.
:param solver: Bitcoin fund solver.
:type solver: bitcoin.solver.FundSolver
:returns: FundTransaction -- Bitcoin fund transaction instance.
>>> from shuttle.providers.bitcoin.htlc import HTLC
>>> from shuttle.providers.bitcoin.transaction import FundTransaction
>>> from shuttle.providers.bitcoin.solver import FundSolver
>>> 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_solver = FundSolver("92cbbc5990cb5090326a76feeb321cad01048635afe5756523bbf9f7a75bf38b")
>>> fund_transaction = FundTransaction(network="testnet")
>>> fund_transaction.build_transaction(sender_wallet, htlc, 10000)
>>> fund_transaction.sign(solver=fund_solver)
<shuttle.providers.bitcoin.transaction.FundTransaction object at 0x0409DAF0>
"""
# Checking parameter instances
if not isinstance(solver, FundSolver):
raise TypeError(
"invalid solver instance, only takes Bitcoin FundSolver class")
if not self.unspent or not self.previous_transaction_indexes or not self.transaction:
raise ValueError(
"transaction script or unspent is none, build transaction first"
)
# Organizing outputs
outputs = self.outputs(self.unspent, self.previous_transaction_indexes)
# Signing fund transaction
self.transaction.spend(outputs, [solver.solve() for _ in outputs])
self._type = "bitcoin_fund_signed"
return self
# Automatically analysis previous transaction indexes using fund amount
def get_previous_transaction_indexes(self, amount=None):
if amount is None:
amount = self.amount
temp_amount = int()
previous_transaction_indexes = list()
for index, unspent in enumerate(self.unspent):
temp_amount += unspent["amount"]
if temp_amount > (amount + fee_calculator((index + 1), 2)):
previous_transaction_indexes.append(index)
break
previous_transaction_indexes.append(index)
return previous_transaction_indexes
def unsigned_raw(self):
"""
Get Bitcoin unsigned fund transaction raw.
:returns: str -- Bitcoin unsigned fund transaction raw.
>>> 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(sender_wallet, htlc, 10000)
>>> fund_transaction.unsigned_raw()
"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"
"""
# Checking transaction and UTXO
if not self.transaction or not self.unspent:
raise ValueError(
"transaction script or unspent is none, build transaction first"
)
outputs = []
for index, utxo in enumerate(self.unspent):
if self.previous_transaction_indexes is None or \
index in self.previous_transaction_indexes:
outputs.append(
dict(amount=utxo["amount"],
n=utxo["output_index"],
script=utxo["script"]))
# Encoding fund transaction raw
return b64encode(
str(
json.dumps(
dict(fee=self._fee,
raw=self.transaction.hexlify(),
outputs=outputs,
network=self.network,
type="bitcoin_fund_unsigned"))).encode()).decode()
def sign_transaction(self, txins: Union[TxOut],
tx: MutableTransaction) -> MutableTransaction:
'''sign the parent txn outputs P2PKH'''
solver = P2pkhSolver(self._private_key)
return tx.spend(txins, [solver for i in txins])
class RefundTransaction(Transaction):
"""
Bitcoin Refund transaction.
:param network: Bitcoin network, defaults to ``mainnet``.
:type network: str
:param version: Bitcoin transaction version, defaults to ``2``.
:type version: int
:returns: RefundTransaction -- Bitcoin refund transaction instance.
.. warning::
Do not forget to build transaction after initialize refund transaction.
"""
def __init__(self,
network: str = config["network"],
version: int = config["version"]):
super().__init__(network=network, version=version)
self._transaction_hash: Optional[str] = None
self._transaction_detail: Optional[dict] = None
self._htlc_utxo: Optional[dict] = None
self._interest: Optional[int] = None
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 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 transaction_raw(self) -> str:
"""
Get Bitcoin refund transaction raw.
:returns: str -- Bitcoin refund transaction raw.
>>> from swap.providers.bitcoin.transaction import RefundTransaction
>>> refund_transaction: RefundTransaction = RefundTransaction("testnet")
>>> refund_transaction.build_transaction(address="n1wgm6kkzMcNfAtJmes8YhpvtDzdNhDY5a", transaction_hash="a211d21110756b266925fee2fbf2dc81529beef5e410311b38578dc3a076fb31")
>>> refund_transaction.transaction_raw()
"eyJmZWUiOiA1NzYsICJyYXciOiAiMDIwMDAwMDAwMTMxZmI3NmEwYzM4ZDU3MzgxYjMxMTBlNGY1ZWU5YjUyODFkY2YyZmJlMmZlMjU2OTI2NmI3NTEwMTFkMjExYTIwMDAwMDAwMDAwZmZmZmZmZmYwMTYwODQwMTAwMDAwMDAwMDAxOTc2YTkxNGUwMGZmMmE2NDBiN2NlMmQzMzY4NjA3MzkxNjk0ODdhNTdmODRiMTU4OGFjMDAwMDAwMDAiLCAib3V0cHV0cyI6IHsidmFsdWUiOiAxMDAwMDAsICJ0eF9vdXRwdXRfbiI6IDAsICJzY3JpcHQiOiAiYTkxNGM4Yzc3YTliNDNlZTJiZGYxYTA3YzQ4Njk5ODMzZDc2NjhiZjI2NGM4NyJ9LCAibmV0d29yayI6ICJ0ZXN0bmV0IiwgInR5cGUiOiAiYml0Y29pbl9yZWZ1bmRfdW5zaWduZWQifQ=="
"""
# Check transaction
if self._transaction is None:
raise ValueError("Transaction is none, build transaction first.")
# Encode refund transaction raw
if self._type == "bitcoin_refund_signed":
return clean_transaction_raw(
b64encode(
str(
json.dumps(
dict(
raw=self._transaction.hexlify(),
fee=self._fee,
network=self._network,
type=self._type,
))).encode()).decode())
return clean_transaction_raw(
b64encode(
str(
json.dumps(
dict(
fee=self._fee,
raw=self._transaction.hexlify(),
outputs=dict(value=self._htlc_utxo["value"],
tx_output_n=0,
script=self._htlc_utxo["script"]),
network=self._network,
type=self._type,
))).encode()).decode())
class WithdrawTransaction(Transaction):
"""
Bitcoin Withdraw transaction.
:param network: Bitcoin network, defaults to ``mainnet``.
:type network: str
:param version: Bitcoin transaction version, defaults to ``2``.
:type version: int
:returns: WithdrawTransaction -- Bitcoin withdraw transaction instance.
.. warning::
Do not forget to build transaction after initialize withdraw transaction.
"""
def __init__(self,
network: str = config["network"],
version: int = config["version"]):
super().__init__(network=network, version=version)
self._transaction_hash: Optional[str] = None
self._transaction_detail: Optional[dict] = None
self._htlc_utxo: Optional[dict] = None
self._interest: Optional[int] = None
def build_transaction(
self,
address: str,
transaction_hash: str,
locktime: int = config["locktime"]) -> "WithdrawTransaction":
"""
Build Bitcoin withdraw transaction.
:param address: Bitcoin recipient 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: WithdrawTransaction -- Bitcoin withdraw transaction instance.
>>> from swap.providers.bitcoin.transaction import WithdrawTransaction
>>> withdraw_transaction: WithdrawTransaction = WithdrawTransaction("testnet")
>>> withdraw_transaction.build_transaction(address="mgS3WMHp9nvdUPeDJxr5iCF2P5HuFZSR3V", transaction_hash="a211d21110756b266925fee2fbf2dc81529beef5e410311b38578dc3a076fb31")
<swap.providers.bitcoin.transaction.WithdrawTransaction object at 0x0409DAF0>
"""
# Check parameter instances
if not is_address(address, self._network):
raise AddressError(
f"Invalid Bitcoin recipient '{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 hash, 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_withdraw_unsigned"
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 transaction_raw(self) -> str:
"""
Get Bitcoin withdraw transaction raw.
:returns: str -- Bitcoin withdraw transaction raw.
>>> from swap.providers.bitcoin.transaction import WithdrawTransaction
>>> withdraw_transaction: WithdrawTransaction = WithdrawTransaction("testnet")
>>> withdraw_transaction.build_transaction(address="mgS3WMHp9nvdUPeDJxr5iCF2P5HuFZSR3V", transaction_hash="a211d21110756b266925fee2fbf2dc81529beef5e410311b38578dc3a076fb31")
>>> withdraw_transaction.transaction_raw()
"eyJmZWUiOiA1NzYsICJyYXciOiAiMDIwMDAwMDAwMTMxZmI3NmEwYzM4ZDU3MzgxYjMxMTBlNGY1ZWU5YjUyODFkY2YyZmJlMmZlMjU2OTI2NmI3NTEwMTFkMjExYTIwMDAwMDAwMDAwZmZmZmZmZmYwMTYwODQwMTAwMDAwMDAwMDAxOTc2YTkxNDBhMGE2NTkwZTZiYTRiNDgxMThkMjFiODY4MTI2MTUyMTllY2U3NmI4OGFjMDAwMDAwMDAiLCAib3V0cHV0cyI6IHsidmFsdWUiOiAxMDAwMDAsICJ0eF9vdXRwdXRfbiI6IDAsICJzY3JpcHQiOiAiYTkxNGM4Yzc3YTliNDNlZTJiZGYxYTA3YzQ4Njk5ODMzZDc2NjhiZjI2NGM4NyJ9LCAibmV0d29yayI6ICJ0ZXN0bmV0IiwgInR5cGUiOiAiYml0Y29pbl93aXRoZHJhd191bnNpZ25lZCJ9"
"""
# Check transaction
if self._transaction is None:
raise ValueError("Transaction is none, build transaction first.")
# Encode withdraw transaction raw
if self._type == "bitcoin_withdraw_signed":
return clean_transaction_raw(
b64encode(
str(
json.dumps(
dict(
raw=self._transaction.hexlify(),
fee=self._fee,
network=self._network,
type=self._type,
))).encode()).decode())
return clean_transaction_raw(
b64encode(
str(
json.dumps(
dict(
fee=self._fee,
raw=self._transaction.hexlify(),
outputs=dict(value=self._htlc_utxo["value"],
tx_output_n=0,
script=self._htlc_utxo["script"]),
network=self._network,
type=self._type,
))).encode()).decode())
class FundTransaction(Transaction):
"""
Bitcoin Fund transaction.
:param network: Bitcoin network, defaults to ``mainnet``.
:type network: str
:param version: Bitcoin transaction version, defaults to ``2``.
:type version: int
:returns: FundTransaction -- Bitcoin fund transaction instance.
.. warning::
Do not forget to build transaction after initialize fund transaction.
"""
def __init__(self,
network: str = config["network"],
version: int = config["version"]):
super().__init__(network=network, version=version)
self._htlc: Optional[HTLC] = None
self._utxos: Optional[list] = None
self._previous_transaction_indexes: Optional[list] = None
self._interest: Optional[int] = None
def build_transaction(
self,
address: str,
htlc: HTLC,
amount: Optional[Union[int, float]],
unit: str = config["unit"],
locktime: int = config["locktime"]) -> "FundTransaction":
"""
Build Bitcoin fund transaction.
:param address: Bitcoin sender address.
:type address: str
:param htlc: Bitcoin HTLC instance.
:type htlc: bitcoin.htlc.HTLC
:param amount: Bitcoin amount, default to ``None``.
:type amount: int, float
:param unit: Bitcoin unit, default to ``Satoshi``.
:type unit: str
:param locktime: Bitcoin transaction lock time, defaults to ``0``.
:type locktime: int
:returns: FundTransaction -- Bitcoin fund transaction instance.
>>> from swap.providers.bitcoin.htlc import HTLC
>>> from swap.providers.bitcoin.transaction import FundTransaction
>>> from swap.utils import sha256
>>> htlc: HTLC = HTLC(network="testnet")
>>> htlc.build_htlc(secret_hash=sha256("Hello Meheret!"), recipient_address="mgS3WMHp9nvdUPeDJxr5iCF2P5HuFZSR3V", sender_address="n1wgm6kkzMcNfAtJmes8YhpvtDzdNhDY5a", endtime=1624687630)
>>> fund_transaction: FundTransaction = FundTransaction(network="testnet")
>>> fund_transaction.build_transaction(address="n1wgm6kkzMcNfAtJmes8YhpvtDzdNhDY5a", htlc=htlc, amount=0.001, unit="BTC")
<swap.providers.bitcoin.transaction.FundTransaction object at 0x0409DAF0>
"""
# Check parameter instances
if not is_address(address, self._network):
raise AddressError(
f"Invalid Bitcoin sender '{address}' {self._network} address.")
if not isinstance(htlc, HTLC):
raise TypeError(
"Invalid Bitcoin HTLC instance, only takes xinfin HTLC class")
if htlc.agreements and address != htlc.agreements["sender_address"]:
raise AddressError(
f"Wrong Bitcoin sender '{address}' address",
"address must be equal with HTLC agreements sender address.")
if unit not in ["BTC", "mBTC", "Satoshi"]:
raise UnitError(
"Invalid Bitcoin unit, choose only 'BTC', 'mBTC' or 'Satoshi' units."
)
self._address, outputs, self._htlc, self._amount = (
address, [], htlc,
(amount if unit == "Satoshi" else amount_unit_converter(
amount=amount, unit_from=f"{unit}2Satoshi")))
# Get Sender UTXO's
self._utxos = get_utxos(address=self._address, network=self._network)
# Outputs action
outputs.append(
TxOut(value=self._amount,
n=0,
script_pubkey=get_address_hash(
address=self._htlc.contract_address(), script=True)))
# Get previous transaction indexes
self._previous_transaction_indexes, max_amount = _get_previous_transaction_indexes(
utxos=self._utxos, amount=self._amount, transaction_output=2)
# Build transaction inputs
inputs, amount = _build_inputs(
utxos=self._utxos,
previous_transaction_indexes=self._previous_transaction_indexes)
# Calculate the fee
self._fee = fee_calculator(len(inputs), 2)
if amount < self._amount:
raise BalanceError("Insufficient spend UTXO's",
"you don't have enough amount.")
elif amount < (self._amount + self._fee):
raise BalanceError(
f"You don't have enough amount to pay '{self._fee}' Satoshi fee",
f"you can spend maximum '{amount - self._fee}' Satoshi amount."
)
return_amount: int = int(amount - (self._amount + self._fee))
if return_amount != 0:
outputs.append(
TxOut(value=return_amount,
n=len(outputs),
script_pubkey=get_address_hash(address=self._address,
script=True)))
# Build mutable transaction
self._transaction = MutableTransaction(version=self._version,
ins=inputs,
outs=outputs,
locktime=Locktime(locktime))
# Set transaction type
self._type = "bitcoin_fund_unsigned"
return self
def sign(self, solver: FundSolver) -> "FundTransaction":
"""
Sign Bitcoin fund transaction.
:param solver: Bitcoin fund solver.
:type solver: bitcoin.solver.FundSolver
:returns: FundTransaction -- Bitcoin fund transaction instance.
>>> from swap.providers.bitcoin.htlc import HTLC
>>> from swap.providers.bitcoin.transaction import FundTransaction
>>> from swap.providers.bitcoin.solver import FundSolver
>>> from swap.utils import sha256
>>> htlc: HTLC = HTLC(network="testnet")
>>> htlc.build_htlc(secret_hash=sha256("Hello Meheret!"), recipient_address="mgS3WMHp9nvdUPeDJxr5iCF2P5HuFZSR3V", sender_address="n1wgm6kkzMcNfAtJmes8YhpvtDzdNhDY5a", endtime=1624687630)
>>> fund_transaction: FundTransaction = FundTransaction(network="testnet")
>>> fund_transaction.build_transaction(address="n1wgm6kkzMcNfAtJmes8YhpvtDzdNhDY5a", htlc=htlc, amount=0.001, unit="BTC")
>>> fund_solver: FundSolver = FundSolver(xprivate_key="tprv8ZgxMBicQKsPeMHMJAc6uWGYiGqi1MVM2ybmzXL2TAoDpQe85uyDpdT7mv7Nhdu5rTCBEKLZsd9KyP2LQZJzZTvgVQvENArgU8e6DoYBiXf")
>>> fund_transaction.sign(solver=fund_solver)
<swap.providers.bitcoin.transaction.FundTransaction object at 0x0409DAF0>
"""
# Check parameter instances
if not isinstance(solver, FundSolver):
raise TypeError(
f"Solver must be Bitcoin FundSolver, not {type(solver).__name__} type."
)
if self._transaction is None:
raise ValueError("Transaction is none, build transaction first.")
# Organize outputs
outputs = _build_outputs(
utxos=self._utxos,
previous_transaction_indexes=self._previous_transaction_indexes)
# Sign fund transaction
self._transaction.spend(
txouts=outputs,
solvers=[solver.solve(network=self._network) for _ in outputs])
# Set transaction type
self._type = "bitcoin_fund_signed"
return self
def transaction_raw(self) -> str:
"""
Get Bitcoin fund transaction raw.
:returns: str -- Bitcoin fund transaction raw.
>>> from swap.providers.bitcoin.htlc import HTLC
>>> from swap.providers.bitcoin.transaction import FundTransaction
>>> from swap.utils import sha256
>>> htlc: HTLC = HTLC(network="testnet")
>>> htlc.build_htlc(secret_hash=sha256("Hello Meheret!"), recipient_address="mgS3WMHp9nvdUPeDJxr5iCF2P5HuFZSR3V", sender_address="n1wgm6kkzMcNfAtJmes8YhpvtDzdNhDY5a", endtime=1624687630)
>>> fund_transaction: FundTransaction = FundTransaction(network="testnet")
>>> fund_transaction.build_transaction(address="n1wgm6kkzMcNfAtJmes8YhpvtDzdNhDY5a", htlc=htlc, amount=0.001, unit="BTC")
>>> fund_transaction.transaction_raw()
"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"
"""
# Check parameter instances
if self._transaction is None:
raise ValueError("Transaction is none, build transaction first.")
# Encode fund transaction raw
if self._type == "bitcoin_fund_signed":
return clean_transaction_raw(
b64encode(
str(
json.dumps(
dict(
raw=self._transaction.hexlify(),
fee=self._fee,
network=self._network,
type=self._type,
))).encode()).decode())
return clean_transaction_raw(
b64encode(
str(
json.dumps(
dict(
fee=self._fee,
raw=self._transaction.hexlify(),
outputs=_build_outputs(
utxos=self._utxos,
previous_transaction_indexes=self.
_previous_transaction_indexes,
only_dict=True),
network=self._network,
type=self._type,
))).encode()).decode())
class NormalTransaction(Transaction):
"""
Bitcoin Normal transaction.
:param network: Bitcoin network, defaults to ``mainnet``.
:type network: str
:param version: Bitcoin transaction version, defaults to ``2``.
:type version: int
:returns: NormalTransaction -- Bitcoin normal transaction instance.
.. warning::
Do not forget to build transaction after initialize normal transaction.
"""
def __init__(self,
network: str = config["network"],
version: int = config["version"]):
super().__init__(network=network, version=version)
self._utxos: Optional[list] = None
self._previous_transaction_indexes: Optional[list] = None
self._interest: Optional[int] = None
def build_transaction(
self,
address: str,
recipients: dict,
unit: str = config["unit"],
locktime: int = config["locktime"]) -> "NormalTransaction":
"""
Build Bitcoin normal transaction.
:param address: Bitcoin sender address.
:type address: str
:param recipients: Recipients Bitcoin address and amount.
:type recipients: dict
:param unit: Bitcoin unit, default to ``Satoshi``.
:type unit: str
:param locktime: Bitcoin transaction lock time, defaults to ``0``.
:type locktime: int
:returns: NormalTransaction -- Bitcoin normal transaction instance.
>>> from swap.providers.bitcoin.transaction import NormalTransaction
>>> normal_transaction: NormalTransaction = NormalTransaction(network="testnet")
>>> normal_transaction.build_transaction(address="mkFWGt4hT11XS8dJKzzRFsTrqjjAwZfQAC", recipients={"2N6kHwQy6Ph5EdKNgzGrcW2WhGHKGfmP5ae": 10000000}, locktime=0)
<swap.providers.bitcoin.transaction.NormalTransaction object at 0x0409DAF0>
"""
# Check parameter instances
if not is_address(address, self._network):
raise AddressError(
f"Invalid Bitcoin sender '{address}' {self._network} address.")
if unit not in ["BTC", "mBTC", "Satoshi"]:
raise UnitError(
"Invalid Bitcoin unit, choose only 'BTC', 'mBTC' or 'Satoshi' units."
)
self._address, outputs, self._amount = (address, [], (
sum(recipients.values())
if unit == "Satoshi" else amount_unit_converter(
amount=sum(recipients.values()), unit_from=f"{unit}2Satoshi")))
# Get Sender UTXO's
self._utxos = get_utxos(address=self._address, network=self._network)
# Outputs action
for _address, _amount in recipients.items():
if not is_address(_address, self._network):
raise AddressError(
f"Invalid Bitcoin recipients '{_address}' {self._network} address."
)
outputs.append(
TxOut(value=int(_amount),
n=len(outputs),
script_pubkey=get_address_hash(address=_address,
script=True)))
# Get previous transaction indexes
self._previous_transaction_indexes, max_amount = _get_previous_transaction_indexes(
utxos=self._utxos,
amount=self._amount,
transaction_output=len(outputs))
# Build transaction inputs
inputs, amount = _build_inputs(
utxos=self._utxos,
previous_transaction_indexes=self._previous_transaction_indexes)
# Calculate the fee
self._fee = fee_calculator(len(inputs), len(outputs))
if amount < self._amount:
raise BalanceError("Insufficient spend UTXO's",
"you don't have enough amount.")
elif amount < (self._amount + self._fee):
raise BalanceError(
f"You don't have enough amount to pay '{self._fee}' Satoshi fee",
f"you can spend maximum '{amount - self._fee}' Satoshi amount."
)
return_amount: int = int(amount - (self._amount + self._fee))
if return_amount != 0:
outputs.append(
TxOut(value=return_amount,
n=len(outputs),
script_pubkey=get_address_hash(address=self._address,
script=True)))
# Build mutable transaction
self._transaction = MutableTransaction(version=self._version,
ins=inputs,
outs=outputs,
locktime=Locktime(locktime))
# Set transaction type
self._type = "bitcoin_normal_unsigned"
return self
def sign(self, solver: NormalSolver) -> "NormalTransaction":
"""
Sign Bitcoin normal transaction.
:param solver: Bitcoin normal solver.
:type solver: bitcoin.solver.NormalSolver
:returns: NormalTransaction -- Bitcoin normal transaction instance.
>>> from swap.providers.bitcoin.transaction import NormalTransaction
>>> from swap.providers.bitcoin.solver import NormalSolver
>>> from swap.providers.bitcoin.wallet import Wallet, DEFAULT_PATH
>>> sender_wallet: Wallet = Wallet(network="testnet").from_entropy(entropy="72fee73846f2d1a5807dc8c953bf79f1").from_path(path=DEFAULT_PATH)
>>> normal_solver: NormalSolver = NormalSolver(xprivate_key=sender_wallet.root_xprivate_key())
>>> normal_transaction: NormalTransaction = NormalTransaction(network="testnet").build_transaction(address=sender_wallet.address(), recipients={"2N6kHwQy6Ph5EdKNgzGrcW2WhGHKGfmP5ae": 10000000})
>>> normal_transaction.sign(solver=normal_solver)
<swap.providers.bitcoin.transaction.NormalTransaction object at 0x0409DAF0>
"""
# Check parameter instances
if not isinstance(solver, NormalSolver):
raise TypeError(
f"Solver must be Bitcoin NormalSolver, not {type(solver).__name__} type."
)
if self._transaction is None:
raise ValueError("Transaction is none, build transaction first.")
# Organize outputs
outputs = _build_outputs(
utxos=self._utxos,
previous_transaction_indexes=self._previous_transaction_indexes)
# Sign normal transaction
self._transaction.spend(
txouts=outputs,
solvers=[solver.solve(network=self._network) for _ in outputs])
# Set transaction type
self._type = "bitcoin_normal_signed"
return self
def transaction_raw(self) -> str:
"""
Get Bitcoin normal transaction raw.
:returns: str -- Bitcoin normal transaction raw.
>>> from swap.providers.bitcoin.transaction import NormalTransaction
>>> normal_transaction: NormalTransaction = NormalTransaction(network="testnet")
>>> normal_transaction.build_transaction(address="mkFWGt4hT11XS8dJKzzRFsTrqjjAwZfQAC", recipients={"2N6kHwQy6Ph5EdKNgzGrcW2WhGHKGfmP5ae": 10000000})
>>> normal_transaction.transaction_raw()
"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"
"""
# Check parameter instances
if self._transaction is None:
raise ValueError("Transaction is none, build transaction first.")
# Encode normal transaction raw
if self._type == "bitcoin_normal_signed":
return clean_transaction_raw(
b64encode(
str(
json.dumps(
dict(raw=self._transaction.hexlify(),
fee=self._fee,
network=self._network,
type=self._type))).encode()).decode())
return clean_transaction_raw(
b64encode(
str(
json.dumps(
dict(fee=self._fee,
raw=self._transaction.hexlify(),
outputs=_build_outputs(
utxos=self._utxos,
previous_transaction_indexes=self.
_previous_transaction_indexes,
only_dict=True),
network=self._network,
type=self._type))).encode()).decode())
def commit_tx(committer, receiver, secret, type, lock_time, penalty):
if type not in ['Timed', 'Height']:
raise ValueError("type should be 'Timed' or 'Height'")
secret_hash = hashlib.sha256(hashlib.sha256(
secret.encode()).digest()).digest()
secret_hash = StackData.from_bytes(secret_hash)
print("秘密经hash256加密结果:", secret_hash)
# 创建输出脚本
if type is 'Height':
# Relative - HeightBased
sequence = lock_time
lock_time_script = IfElseScript(
# if branch
Hashlock256Script(secret_hash, P2pkhScript(committer.pubk)),
# else branch
RelativeTimelockScript( # timelocked script
HeightBasedSequence(sequence), # expiration
P2pkhScript(receiver.pubk)))
else:
# Relative - TimedBased
time_delta = datetime.timedelta(minutes=lock_time)
time_now = datetime.datetime.now()
print("current time: ", time_now.strftime("%y-%m-%d %H:%M:%S"))
print("pay deposit time: ",
(time_now + time_delta).strftime("%y-%m-%d %H:%M:%S"))
lock_time_script = IfElseScript(
# if branch
Hashlock256Script(secret_hash, P2pkhScript(committer.pubk)),
# else branch
RelativeTimelockScript( # timelocked script
TimeBasedSequence.from_timedelta(time_delta), # expiration
P2pkhScript(receiver.pubk)))
# 找零脚本
change_script = P2pkhScript(committer.pubk)
# 清理资产
print("sweeping fund...")
to_spend_hash, balance = sweep_fund(privkey=str(committer.privk),
address=str(committer.address),
coin_symbol=coin_symbol,
api_key=committer.api_key)
# 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=2)
mining_fee = int(mining_fee_per_kb * (estimated_tx_size / 1000)) * 2
# 设置罚金
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(committer.privk)
# 修改交易
signed = unsigned.spend([to_spend.outs[0]], [solver])
print('commit_tx_hex: ', signed.hexlify())
# 发送交易
tx = pushtx(coin_symbol=coin_symbol,
api_key=committer.api_key,
tx_hex=signed.hexlify())
format_output(tx)
return tx['tx']['hash']
def sign_transaction(self, txin: TxOut,
tx: MutableTransaction) -> MutableTransaction:
'''sign the parent txn outputs P2PKH'''
solver = P2pkhSolver(self._private_key)
return tx.spend([txin], [solver])
class RefundTransaction(Transaction):
"""
Bitcoin RefundTransaction class.
:param version: bitcoin transaction version, defaults to 2.
:type version: int
:param network: bitcoin network, defaults to testnet.
:type network: str
:returns: Transaction -- bitcoin transaction instance.
.. warning::
Do not forget to build transaction after initialize refund transaction.
:fee: Get bitcoin refund transaction fee.
>>> refund_transaction.fee
675
"""
# Initialization claim transaction
def __init__(self, version=2, network="testnet"):
super().__init__(version=version, network=network)
# Initialization transaction_id, wallet and amount
self.transaction_id, self.wallet, self.amount, self.secret = \
None, None, None, None
# Getting transaction detail by id
self.transaction_detail = None
# Transaction detail outputs (HTLC and Sender account)
self.htlc = None
self.sender_account = None
# Building transaction
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
# Signing transaction using private keys
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 unsigned_raw(self):
"""
Get bitcoin unsigned refund transaction raw.
:returns: str -- bitcoin unsigned refund transaction raw.
>>> from shuttle.providers.bitcoin.transaction import RefundTransaction
>>> refund_transaction = RefundTransaction(network="testnet")
>>> refund_transaction.build_transaction(fund_transaction_id, sender_wallet, 10000)
>>> refund_transaction.unsigned_raw()
"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"
"""
if self.transaction is None:
raise ValueError(
"transaction script is none, build transaction first")
outputs = [
dict(amount=self.htlc["value"], n=0, script=self.htlc["script"])
]
return b64encode(
str(
json.dumps(
dict(fee=self.fee,
raw=self.transaction.hexlify(),
outputs=outputs,
recipient_address=str(self.wallet.address()),
sender_address=str(self.sender_account.address()),
secret=self.secret,
network=self.network,
type="bitcoin_refund_unsigned"))).encode()).decode()
class FundTransaction(Transaction):
"""
Bitcoin FundTransaction class.
:param version: bitcoin transaction version, defaults to 2.
:type version: int
:param network: bitcoin network, defaults to testnet.
:type network: str
:returns: FundTransaction -- bitcoin fund transaction instance.
.. warning::
Do not forget to build transaction after initialize fund transaction.
:fee: Get bitcoin fund transaction fee.
>>> fund_transaction.fee
675
"""
# Initialization fund transaction
def __init__(self, version=2, network="testnet"):
super().__init__(version=version, network=network)
# Initialization wallet, htlc, amount and unspent
self.wallet, self.htlc, self.amount, self.unspent = None, None, None, None
# Getting previous transaction indexes using funding amount
self.previous_transaction_indexes = None
# Building transaction
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
# Signing transaction using fund solver
def sign(self, solver):
"""
Sign bitcoin fund transaction.
:param solver: bitcoin fund solver.
:type solver: bitcoin.solver.FundSolver
: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)
>>> fund_transaction.sign(fund_solver)
<shuttle.providers.bitcoin.transaction.FundTransaction object at 0x0409DAF0>
"""
if not isinstance(solver, FundSolver):
raise TypeError(
"invalid solver instance, only takes bitcoin FundSolver class")
if not self.unspent or not self.previous_transaction_indexes or not self.transaction:
raise ValueError(
"transaction script or unspent is none, build transaction first"
)
outputs = self.outputs(self.unspent, self.previous_transaction_indexes)
self.transaction.spend(outputs, [solver.solve() for _ in outputs])
return self
# Automatically analysis previous transaction indexes using fund amount
def get_previous_transaction_indexes(self, amount=None):
if amount is None:
amount = self.amount
temp_amount = int()
previous_transaction_indexes = list()
for index, unspent in enumerate(self.unspent):
temp_amount += unspent["amount"]
if temp_amount > (amount + fee_calculator((index + 1), 2)):
previous_transaction_indexes.append(index)
break
previous_transaction_indexes.append(index)
return previous_transaction_indexes
def unsigned_raw(self):
"""
Get bitcoin unsigned fund transaction raw.
:returns: str -- bitcoin unsigned fund transaction raw.
>>> from shuttle.providers.bitcoin.transaction import FundTransaction
>>> fund_transaction = FundTransaction(network="testnet")
>>> fund_transaction.build_transaction(sender_wallet, htlc, 10000)
>>> fund_transaction.unsigned_raw()
"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"
"""
outputs = list()
if not self.transaction or not self.unspent:
raise ValueError(
"transaction script or unspent is none, build transaction first"
)
for index, utxo in enumerate(self.unspent):
if self.previous_transaction_indexes is None or index in self.previous_transaction_indexes:
outputs.append(
dict(amount=utxo["amount"],
n=utxo["output_index"],
script=utxo["script"]))
return b64encode(
str(
json.dumps(
dict(fee=self.fee,
raw=self.transaction.hexlify(),
outputs=outputs,
network=self.network,
type="bitcoin_fund_unsigned"))).encode()).decode()