def fill_psbt(self, b64psbt, non_witness: bool = True, xpubs: bool = True):
psbt = PSBT()
psbt.deserialize(b64psbt)
if non_witness:
for i, inp in enumerate(psbt.tx.vin):
txid = inp.prevout.hash.to_bytes(32, 'big').hex()
try:
res = self.cli.gettransaction(txid)
except:
raise SpecterError(
"Can't find previous transaction in the wallet.")
stream = BytesIO(bytes.fromhex(res["hex"]))
prevtx = CTransaction()
prevtx.deserialize(stream)
psbt.inputs[i].non_witness_utxo = prevtx
if xpubs:
# for multisig add xpub fields
if len(self.keys) > 1:
for k in self.keys:
key = b'\x01' + decode_base58(k.xpub)
if k.fingerprint != '':
fingerprint = bytes.fromhex(k.fingerprint)
else:
fingerprint = get_xpub_fingerprint(k.xpub)
if k.derivation != '':
der = der_to_bytes(k.derivation)
else:
der = b''
value = fingerprint + der
psbt.unknown[key] = value
return psbt.serialize()
def get_txid(tx):
b = BytesIO(bytes.fromhex(tx))
t = CTransaction()
t.deserialize(b)
for inp in t.vin:
inp.scriptSig = b""
t.rehash()
return t.hash
def fill_psbt(self, b64psbt):
psbt = PSBT()
psbt.deserialize(b64psbt)
for i, inp in enumerate(psbt.tx.vin):
txid = inp.prevout.hash.to_bytes(32,'big').hex()
try:
res = self.cli.gettransaction(txid)
except:
raise SpecterError("Can't find previous transaction in the wallet.")
stream = BytesIO(bytes.fromhex(res["hex"]))
prevtx = CTransaction()
prevtx.deserialize(stream)
psbt.inputs[i].non_witness_utxo = prevtx
return psbt.serialize()
def fill_psbt(self, b64psbt, non_witness: bool = True, xpubs: bool = True):
psbt = PSBT()
psbt.deserialize(b64psbt)
if non_witness:
for i, inp in enumerate(psbt.tx.vin):
txid = inp.prevout.hash.to_bytes(32, "big").hex()
try:
res = self.gettransaction(txid)
stream = BytesIO(bytes.fromhex(res["hex"]))
prevtx = CTransaction()
prevtx.deserialize(stream)
psbt.inputs[i].non_witness_utxo = prevtx
except:
logger.error(
"Can't find previous transaction in the wallet. Signing might not be possible for certain devices..."
)
else:
# remove non_witness_utxo if we don't want them
for inp in psbt.inputs:
if inp.witness_utxo is not None:
inp.non_witness_utxo = None
if xpubs:
# for multisig add xpub fields
if len(self.keys) > 1:
for k in self.keys:
key = b"\x01" + decode_base58(k.xpub)
if k.fingerprint != "":
fingerprint = bytes.fromhex(k.fingerprint)
else:
fingerprint = get_xpub_fingerprint(k.xpub)
if k.derivation != "":
der = der_to_bytes(k.derivation)
else:
der = b""
value = fingerprint + der
psbt.unknown[key] = value
return psbt.serialize()