def to_scriptPubKey(self):
"""Convert an address to a scriptPubKey"""
if self.nVersion == bitcoin.params.BASE58_PREFIXES['PUBKEY_ADDR']:
return script.CScript([script.OP_DUP, script.OP_HASH160, self, script.OP_EQUALVERIFY, script.OP_CHECKSIG])
elif self.nVersion == bitcoin.params.BASE58_PREFIXES['SCRIPT_ADDR']:
return script.CScript([script.OP_HASH160, self, script.OP_EQUAL])
else:
raise ValueError("CBitcoinAddress: Don't know how to convert version %d to a scriptPubKey" % self.nVersion)
def from_scriptPubKey(cls,
scriptPubKey,
accept_non_canonical_pushdata=True,
accept_bare_checksig=True):
"""Convert a scriptPubKey to a P2PKH address
Raises CBitcoinAddressError if the scriptPubKey isn't of the correct
form.
accept_non_canonical_pushdata - Allow non-canonical pushes (default True)
accept_bare_checksig - Treat bare-checksig as P2PKH scriptPubKeys (default True)
"""
if accept_non_canonical_pushdata:
# Canonicalize script pushes
scriptPubKey = script.CScript(
scriptPubKey) # in case it's not a CScript instance yet
try:
scriptPubKey = script.CScript(
tuple(scriptPubKey)) # canonicalize
except bitcoin.core.script.CScriptInvalidError:
raise CBitcoinAddressError(
'not a P2PKH scriptPubKey: script is invalid')
if (len(scriptPubKey) == 25 and _bord(scriptPubKey[0]) == script.OP_DUP
and _bord(scriptPubKey[1]) == script.OP_HASH160
and _bord(scriptPubKey[2]) == 0x14
and _bord(scriptPubKey[23]) == script.OP_EQUALVERIFY
and _bord(scriptPubKey[24]) == script.OP_CHECKSIG):
return cls.from_bytes(
scriptPubKey[3:23],
bitcoin.params.BASE58_PREFIXES['PUBKEY_ADDR'])
elif accept_bare_checksig:
pubkey = None
# We can operate on the raw bytes directly because we've
# canonicalized everything above.
if (len(scriptPubKey) == 35 # compressed
and _bord(scriptPubKey[0]) == 0x21
and _bord(scriptPubKey[34]) == script.OP_CHECKSIG):
pubkey = scriptPubKey[1:34]
elif (len(scriptPubKey) == 67 # uncompressed
and _bord(scriptPubKey[0]) == 0x41
and _bord(scriptPubKey[66]) == script.OP_CHECKSIG):
pubkey = scriptPubKey[1:65]
if pubkey is not None:
return cls.from_pubkey(pubkey, accept_invalid=True)
raise CBitcoinAddressError('not a P2PKH scriptPubKey')
def to_scriptPubKey(self):
"""Convert an address to a scriptPubKey"""
if self.nVersion in (self.PUBKEY_ADDRESS, self.PUBKEY_ADDRESS_TEST):
return script.CScript([
script.OP_DUP, script.OP_HASH160, self, script.OP_EQUALVERIFY,
script.OP_CHECKSIG
])
elif self.nVersion in (self.SCRIPT_ADDRESS, self.SCRIPT_ADDRESS_TEST):
return script.CScript([script.OP_HASH160, self, script.OP_EQUAL])
else:
raise ValueError(
"CBitcoinAddress: Don't know how to convert version %d to a scriptPubKey"
% self.nVersion)
def boucle_outputs(transaction, longueurOutPuts, senderAdress, boolSegWit, timeStamp, t, positions, hsh):
receiverAdressJoin = ' '
allValues = []
for k in range(longueurOutPuts):
value = (transaction.vout[k].nValue) * 0.00000001
allValues.append(value)
if value != 0:
try:
scrPubKey = b2x(transaction.vout[k].scriptPubKey)
bcBool = int(scrPubKey[0:1],16)
if bcBool == 0:
n = 2
liste = [int(scrPubKey[i:i+n],16) for i in range(0, len(scrPubKey), n)]
liste[0:2]=[]
receiverAdress = encode('bc', bcBool, liste)
else:
ScriptPubKey = script.CScript(x(scrPubKey))
receiverAdress = CBitcoinAddress.from_scriptPubKey(ScriptPubKey)
except CBitcoinAddressError:
receiverAdress = "no address found"
receiverAdressJoin = receiverAdressJoin + "_" + str(receiverAdress)
allTransactions['transactions'].append({'Sender': senderAdress, 'receiver': receiverAdressJoin, 'ammount': allValues, 'time': timeStamp, 'txID': t, 'positions': positions, 'txHash': hsh})
return (allTransactions, value)
def to_scriptPubKey(self, nested=False):
"""Convert an address to a scriptPubKey"""
assert self.nVersion == bitcoin.params.BASE58_PREFIXES['PUBKEY_ADDR']
return script.CScript([
script.OP_DUP, script.OP_HASH160, self, script.OP_EQUALVERIFY,
script.OP_CHECKSIG
])
def sign(self, default_wallet: BitcoinWallet = None):
"""Signing transaction using the wallet object."""
for tx_index, tx_in in enumerate(self.tx.vin):
utxo = self.solvable_utxo[tx_index]
wallet = utxo.wallet or default_wallet
if wallet is None:
raise RuntimeError('Cannot sign transaction without a wallet.')
tx_script = utxo.parsed_script
if utxo.contract:
sig_hash = script.SignatureHash(
script.CScript.fromhex(utxo.contract), self.tx, tx_index,
script.SIGHASH_ALL)
else:
sig_hash = script.SignatureHash(tx_script, self.tx, tx_index,
script.SIGHASH_ALL)
sig = wallet.private_key.sign(sig_hash) + struct.pack(
'<B', script.SIGHASH_ALL)
script_sig = [sig, wallet.private_key.pub
] + utxo.unsigned_script_sig
tx_in.scriptSig = script.CScript(script_sig)
VerifyScript(tx_in.scriptSig, tx_script, self.tx, tx_index,
(SCRIPT_VERIFY_P2SH, ))
self.signed = True
def create_tx(n, addressFrom, addressTo, mixer_list, fee=None): pre_tx = transaction(n, addressFrom, addressTo, mixer_list, fee=None) own_n = len(pre_tx.own_inputs) # Get inputs signed by each of the miners for x in pre_tx.mixer_inputs: sig_mixer, pubKey_mixer = send_tx(pre_tx.tx, x, pre_tx.pruned_mixer_inputs) x.scriptSig = bcs.CScript([sig_mixer, pubKey_mixer]) # Sign inputs owned by sender's address txin_scriptPubKey = bcs.CScript([bcs.OP_DUP, bcs.OP_HASH160, bc.Hash160(addressFrom.pubKey), bcs.OP_EQUALVERIFY, bcs.OP_CHECKSIG]) for i in range(own_n): sighash = bcs.SignatureHash(txin_scriptPubKey, pre_tx.tx, i, bcs.SIGHASH_ALL) sig = addressFrom.priv.sign(sighash) + bytes([bcs.SIGHASH_ALL]) pre_tx.inputs[i].scriptSig = bcs.CScript([sig, addressFrom.pubKey]) bcseval.VerifyScript(pre_tx.inputs[i].scriptSig, txin_scriptPubKey, pre_tx.tx, i, (bcseval.SCRIPT_VERIFY_P2SH,)) return pre_tx
def get_receiver_Address(transaction): rec = '' try: scrPubKey = b2x(transaction.vout[0].scriptPubKey) ScriptPubKey = script.CScript(x(scrPubKey)) rec = CBitcoinAddress.from_scriptPubKey(ScriptPubKey) rec1 = str(rec) except CBitcoinAddressError: rec1 = "no Address found" return(rec1)
def test_audit_contract_non_matching_contract(_, signed_transaction):
btc_network = BitcoinTestNet()
transaction_details = signed_transaction.show_details()
contract = script.CScript([script.OP_TRUE]).hex()
with raises(ValueError,
match='Given transaction is not a valid contract.'):
btc_network.audit_contract(contract,
transaction_details['contract_transaction'])
def build_atomic_swap_contract(self):
self.contract = script.CScript([
script.OP_IF,
script.OP_RIPEMD160,
self.secret_hash,
script.OP_EQUALVERIFY,
script.OP_DUP,
script.OP_HASH160,
CBitcoinAddress(self.recipient_address),
script.OP_ELSE,
int(self.locktime.replace(tzinfo=timezone.utc).timestamp()),
script.OP_CHECKLOCKTIMEVERIFY,
script.OP_DROP,
script.OP_DUP,
script.OP_HASH160,
CBitcoinAddress(self.sender_address),
script.OP_ENDIF,
script.OP_EQUALVERIFY,
script.OP_CHECKSIG,
])
def _received_htlc_output(self, htlc: HTLC,
side: Side) -> Tuple[script.CScript, int]:
# BOLT #3: This output sends funds to either the remote node after the
# HTLC-timeout or using the revocation key, or to an HTLC-success
# transaction with a successful payment preimage. The output is a
# P2WSH, with a witness script:
#
# # To remote node with revocation key
# OP_DUP OP_HASH160 <RIPEMD160(SHA256(revocationpubkey))> OP_EQUAL
# OP_IF
# OP_CHECKSIG
# OP_ELSE
# <remote_htlcpubkey> OP_SWAP OP_SIZE 32 OP_EQUAL
# OP_IF
# # To local node via HTLC-success transaction.
# OP_HASH160 <RIPEMD160(payment_hash)> OP_EQUALVERIFY
# 2 OP_SWAP <local_htlcpubkey> 2 OP_CHECKMULTISIG
# OP_ELSE
# # To remote node after timeout.
# OP_DROP <cltv_expiry> OP_CHECKLOCKTIMEVERIFY OP_DROP
# OP_CHECKSIG
# OP_ENDIF
# OP_ENDIF
htlc_script = script.CScript([
script.OP_DUP, script.OP_HASH160,
Hash160(self.revocation_pubkey(side).format()), script.OP_EQUAL,
script.OP_IF, script.OP_CHECKSIG, script.OP_ELSE,
self.remote_htlc_pubkey(side).format(), script.OP_SWAP,
script.OP_SIZE, 32, script.OP_EQUAL, script.OP_IF,
script.OP_HASH160,
self.ripemd160(htlc.raw_payment_hash()), script.OP_EQUALVERIFY, 2,
script.OP_SWAP,
self.local_htlc_pubkey(side).format(), 2, script.OP_CHECKMULTISIG,
script.OP_ELSE, script.OP_DROP, htlc.cltv_expiry,
script.OP_CHECKLOCKTIMEVERIFY, script.OP_DROP, script.OP_CHECKSIG,
script.OP_ENDIF, script.OP_ENDIF
])
# BOLT #3: The amounts for each output MUST be rounded down to whole
# satoshis.
return htlc_script, htlc.amount_msat // 1000
def _to_local_output(self, fee: int,
side: Side) -> Tuple[script.CScript, int]:
# BOLT #3:
# #### `to_local` Output
#
# This output sends funds back to the owner of this commitment
# transaction and thus must be timelocked using
# `OP_CHECKSEQUENCEVERIFY`. It can be claimed, without delay, by the
# other party if they know the revocation private key. The output is a
# version-0 P2WSH, with a witness script:
#
# OP_IF
# # Penalty transaction
# <revocationpubkey>
# OP_ELSE
# `to_self_delay`
# OP_CHECKSEQUENCEVERIFY
# OP_DROP
# <local_delayedpubkey>
# OP_ENDIF
# OP_CHECKSIG
to_self_script = script.CScript([
script.OP_IF,
self.revocation_pubkey(side).format(), script.OP_ELSE,
self.self_delay[side], script.OP_CHECKSEQUENCEVERIFY,
script.OP_DROP,
self.delayed_pubkey(side).format(), script.OP_ENDIF,
script.OP_CHECKSIG
])
# BOLT #3: The amounts for each output MUST be rounded down to whole
# satoshis. If this amount, minus the fees for the HTLC transaction,
# is less than the `dust_limit_satoshis` set by the owner of the
# commitment transaction, the output MUST NOT be produced (thus the
# funds add to fees).
amount_to_self = self.amounts[side] // 1000
if side == self.opener:
amount_to_self -= fee
return to_self_script, amount_to_self
def generate_multisig_redeem_script(pubkeys: List[str], m: int) -> str:
"""
Creates a M-of-N P2SH-multisig bitcoin redeemscript
Args:
pubkeys: List of hex-encoded compressed public keys
Returns:
hex-encoded redeem script
Example:
TODO
"""
OP_M = script.CScriptOp.encode_op_n(m)
OP_N = script.CScriptOp.encode_op_n(len(pubkeys))
redeem_list = [x(pubkey) for pubkey in pubkeys]
redeem_list.insert(0, OP_M)
redeem_list.append(OP_N)
redeem_list.append(script.OP_CHECKMULTISIG)
redeem_script = script.CScript(redeem_list).hex()
return redeem_script
def transform(self, source):
if isinstance(source, list):
source = ''.join(source)
if source.startswith('0x'):
source = source[2:]
src = script.CScript(x(source))
iterator = iter(src)
for value in iterator:
op = None
s = str(value)
if s.startswith('OP_'):
op = types.opcode_by_name(s)()
elif isinstance(value, int):
op = types.small_int_opcode(value)()
else:
op = types.Push(data=value)
if op is not None:
self.add_instruction(op)
return self.instructions
def _offered_htlc_output(self, htlc: HTLC,
side: Side) -> Tuple[script.CScript, int]:
# BOLT #3: This output sends funds to either an HTLC-timeout
# transaction after the HTLC-timeout or to the remote node
# using the payment preimage or the revocation key. The output
# is a P2WSH, with a witness script:
#
# # To remote node with revocation key
# OP_DUP OP_HASH160 <RIPEMD160(SHA256(revocationpubkey))> OP_EQUAL
# OP_IF
# OP_CHECKSIG
# OP_ELSE
# <remote_htlcpubkey> OP_SWAP OP_SIZE 32 OP_EQUAL
# OP_NOTIF
# # To local node via HTLC-timeout transaction (timelocked).
# OP_DROP 2 OP_SWAP <local_htlcpubkey> 2 OP_CHECKMULTISIG
# OP_ELSE
# # To remote node with preimage.
# OP_HASH160 <RIPEMD160(payment_hash)> OP_EQUALVERIFY
# OP_CHECKSIG
# OP_ENDIF
# OP_ENDIF
htlc_script = script.CScript([
script.OP_DUP, script.OP_HASH160,
Hash160(self.revocation_pubkey(side).format()), script.OP_EQUAL,
script.OP_IF, script.OP_CHECKSIG, script.OP_ELSE,
self.remote_htlc_pubkey(side).format(), script.OP_SWAP,
script.OP_SIZE, 32, script.OP_EQUAL, script.OP_NOTIF,
script.OP_DROP, 2, script.OP_SWAP,
self.local_htlc_pubkey(side).format(), 2, script.OP_CHECKMULTISIG,
script.OP_ELSE, script.OP_HASH160,
self.ripemd160(htlc.raw_payment_hash()), script.OP_EQUALVERIFY,
script.OP_CHECKSIG, script.OP_ENDIF, script.OP_ENDIF
])
# BOLT #3: The amounts for each output MUST be rounded down to whole
# satoshis.
return htlc_script, htlc.amount_msat // 1000
def to_redeemScript(self):
return script.CScript([
script.OP_DUP, script.OP_HASH160, self, script.OP_EQUALVERIFY,
script.OP_CHECKSIG
])
def to_scriptPubKey(self):
"""Convert an address to a scriptPubKey"""
assert self.witver == 0
return script.CScript([0, self])
def to_scriptPubKey(self):
"""Convert an address to a scriptPubKey"""
assert self.nVersion == bitcoin.params.BASE58_PREFIXES['SCRIPT_ADDR']
return script.CScript([script.OP_HASH160, self, script.OP_EQUAL])
def __init__(
self,
network,
contract: str,
raw_transaction: Optional[str]=None,
transaction_address: Optional[str]=None
):
if not raw_transaction and not transaction_address:
raise ValueError('Provide raw_transaction or transaction_address argument.')
self.network = network
self.symbol = self.network.default_symbol
self.contract = contract
self.tx = None
self.vout = None
self.confirmations = None
self.tx_address = transaction_address
if raw_transaction:
self.tx = self.network.deserialize_raw_transaction(raw_transaction)
try:
self.vout = self.tx.vout[0]
except IndexError:
raise ValueError('Given transaction has no outputs.')
else:
tx_json = get_transaction(network.default_symbol, transaction_address, network.is_test_network())
if not tx_json:
raise ValueError('No transaction found under given address.')
if 'hex' in tx_json:
# transaction from blockcypher or raven explorer
self.tx = self.network.deserialize_raw_transaction(tx_json['hex'])
self.vout = self.tx.vout[0]
else:
# transaction from cryptoid
incorrect_cscript = script.CScript.fromhex(tx_json['outputs'][0]['script'])
correct_cscript = script.CScript([script.OP_HASH160, list(incorrect_cscript)[2], script.OP_EQUAL])
nValue = to_base_units(tx_json['outputs'][0]['amount'])
self.vout = CTxOut(nValue, correct_cscript)
if 'confirmations' in tx_json:
self.confirmations = tx_json['confirmations']
elif 'block_height' in tx_json:
self.confirmations = self.network.latest_block - tx_json['block_height']
elif 'block' in tx_json:
self.confirmations = self.network.latest_block - tx_json['block']
if not self.vout:
raise ValueError('Given transaction has no outputs.')
contract_tx_out = self.vout
contract_script = script.CScript.fromhex(self.contract)
script_pub_key = contract_script.to_p2sh_scriptPubKey()
valid_p2sh = script_pub_key == contract_tx_out.scriptPubKey
self.address = str(CBitcoinAddress.from_scriptPubKey(script_pub_key))
self.balance = get_balance(self.network, self.address)
script_ops = list(contract_script)
if valid_p2sh and self.is_valid_contract_script(script_ops):
self.recipient_address = str(P2PKHBitcoinAddress.from_bytes(script_ops[6]))
self.refund_address = str(P2PKHBitcoinAddress.from_bytes(script_ops[13]))
self.locktime_timestamp = int.from_bytes(script_ops[8], byteorder='little')
self.locktime = datetime.utcfromtimestamp(self.locktime_timestamp)
self.secret_hash = b2x(script_ops[2])
self.value = from_base_units(contract_tx_out.nValue)
else:
raise ValueError('Given transaction is not a valid contract.')
def construct_signed_transaction(redeem_script: str,
sig_files: List[str],
inputs_file: str,
outputs_file: str,
testnet: bool = False) -> str:
"""
Construct a hex-encoded serialized bitcoin transaction
fully-signed and ready for broadcast for a 2-of-3 P2SH-multisig
address
Args:
redeem_script: hex-encoded redeem script (see generate_multisig_redeem_script.py)
sig_files: List of 2 JSON signature files containing a public key and
signatures for each UTXO (see sign_multisig_spend.py)
inputs_file: JSON file of UTXOs to be spent (see get_utxo_set.py)
outputs_file: JSON file of destination addresses (see generate_outputs.py)
testnet: Is this a testnet or mainnet transaction?
Returns:
fully-signed hex-encoded serialized Bitcoin transaction
Raises:
ValueError: If sig_files doesn't have exactly 2 elements.
Example:
TODO
"""
if testnet:
SelectParams('testnet')
else:
SelectParams('mainnet')
# Input validation
if len(sig_files) != 2:
raise ValueError("Two Signature Files are Required")
# load inputs, outputs, and signatures
with open(inputs_file, 'r') as f:
inputs = json.load(f)
with open(outputs_file, 'r') as f:
outputs = json.load(f)
signatures = []
for sig_file in sig_files:
with open(sig_file, 'r') as f:
signatures.append(json.load(f))
# Order Signatures
parsed_redeem_script = btc_utils.parse_redeem_script(redeem_script)
sig1_index = parsed_redeem_script['pubkeys'].index(signatures[0]['pubkey'])
sig2_index = parsed_redeem_script['pubkeys'].index(signatures[1]['pubkey'])
if sig2_index < sig1_index:
signatures = [signatures[1], signatures[0]]
# Construct ScriptSigs
zipped_sigs = zip(signatures[0]['signatures'], signatures[1]['signatures'])
scriptsigs = [
script.CScript([
OP_0,
x(sig1) + bytes([SIGHASH_ALL]),
x(sig2) + bytes([SIGHASH_ALL]),
x(redeem_script)
]) for (sig1, sig2) in zipped_sigs
]
# Construct Inputs List
TxIns = []
for input in inputs:
txid = lx(input['txid'])
vout = input['n']
TxIns.append(CMutableTxIn(COutPoint(txid, vout)))
# Insert ScriptSigs
for i in range(len(TxIns)):
TxIns[i].scriptSig = scriptsigs[i]
# Construct Outputs List
TxOuts = []
for output in outputs:
output_script = CBitcoinAddress(output['address']).to_scriptPubKey()
TxOuts.append(CMutableTxOut(output['amount'], output_script))
# Construct TX
tx = CMutableTransaction(TxIns, TxOuts)
return b2x(tx.serialize())
def htlc_tx(self, commit_tx: CMutableTransaction, outnum: int, side: Side,
amount_sat: int, locktime: int) -> CMutableTransaction:
# BOLT #3:
# ## HTLC-Timeout and HTLC-Success Transactions
#
# These HTLC transactions are almost identical, except the
# HTLC-timeout transaction is timelocked. Both
# HTLC-timeout/HTLC-success transactions can be spent by a valid
# penalty transaction.
# BOLT #3:
# ## HTLC-Timeout and HTLC-Success Transactions
# ...
# * txin count: 1
# * `txin[0]` outpoint: `txid` of the commitment transaction and
# `output_index` of the matching HTLC output for the HTLC transaction
# * `txin[0]` sequence: `0`
# * `txin[0]` script bytes: `0`
txin = CTxIn(COutPoint(commit_tx.GetTxid(), outnum), nSequence=0x0)
# BOLT #3:
# ## HTLC-Timeout and HTLC-Success Transactions
# ...
# * txout count: 1
# * `txout[0]` amount: the HTLC amount minus fees (see [Fee
# Calculation](#fee-calculation))
# * `txout[0]` script: version-0 P2WSH with witness script as shown below
#
# The witness script for the output is:
# OP_IF
# # Penalty transaction
# <revocationpubkey>
# OP_ELSE
# `to_self_delay`
# OP_CHECKSEQUENCEVERIFY
# OP_DROP
# <local_delayedpubkey>
# OP_ENDIF
# OP_CHECKSIG
redeemscript = script.CScript([
script.OP_IF,
self.revocation_pubkey(side).format(), script.OP_ELSE,
self.self_delay[side], script.OP_CHECKSEQUENCEVERIFY,
script.OP_DROP,
self.delayed_pubkey(side).format(), script.OP_ENDIF,
script.OP_CHECKSIG
])
print("htlc redeemscript = {}".format(redeemscript.hex()))
txout = CTxOut(amount_sat,
CScript([script.OP_0,
sha256(redeemscript).digest()]))
# BOLT #3:
# ## HTLC-Timeout and HTLC-Success Transactions
# ...
# * version: 2
# * locktime: `0` for HTLC-success, `cltv_expiry` for HTLC-timeout
return CMutableTransaction(vin=[txin],
vout=[txout],
nVersion=2,
nLockTime=locktime)
def get_first_vout_from_tx_json(cls, tx_json: dict) -> CTxOut:
incorrect_cscript = script.CScript.fromhex(tx_json['outputs'][0]['script'])
correct_cscript = script.CScript([script.OP_HASH160, list(incorrect_cscript)[2], script.OP_EQUAL])
nValue = to_base_units(tx_json['outputs'][0]['amount'])
return CTxOut(nValue, correct_cscript)
def tx_in(self):
return CMutableTxIn(self.outpoint, scriptSig=script.CScript(self.unsigned_script_sig), nSequence=0)
def sign_inputs(tx, inputs, sig, pubKey): for i in range(len(inputs)): inputs[i].scriptSig = bcs.CScript([sig, pubKey])
