def on_tx_received(self, nick, txhex, offerinfo):
try:
tx = btc.deserialize(txhex)
except IndexError as e:
return (False, 'malformed txhex. ' + repr(e))
jlog.info('obtained tx\n' + pprint.pformat(tx))
goodtx, errmsg = self.verify_unsigned_tx(tx, offerinfo)
if not goodtx:
jlog.info('not a good tx, reason=' + errmsg)
return (False, errmsg)
jlog.info('goodtx')
sigs = []
utxos = offerinfo["utxos"]
for index, ins in enumerate(tx['ins']):
utxo = ins['outpoint']['hash'] + ':' + str(
ins['outpoint']['index'])
if utxo not in utxos.keys():
continue
addr = utxos[utxo]['address']
amount = utxos[utxo]["value"]
txs = self.wallet.sign(txhex,
index,
self.wallet.get_key_from_addr(addr),
amount=amount)
sigmsg = btc.deserialize(txs)["ins"][index]["script"].decode("hex")
if "txinwitness" in btc.deserialize(txs)["ins"][index].keys():
#We prepend the witness data since we want (sig, pub, scriptCode);
#also, the items in witness are not serialize_script-ed.
sigmsg = "".join([
btc.serialize_script_unit(x.decode("hex"))
for x in btc.deserialize(txs)["ins"][index]["txinwitness"]
]) + sigmsg
sigs.append(base64.b64encode(sigmsg))
return (True, sigs)
def on_tx_received(self, nick, txhex, offerinfo):
"""Called when the counterparty has sent an unsigned
transaction. Sigs are created and returned if and only
if the transaction passes verification checks (see
verify_unsigned_tx()).
"""
try:
tx = btc.deserialize(txhex)
except (IndexError, SerializationError,
SerializationTruncationError) as e:
return (False, 'malformed txhex. ' + repr(e))
jlog.info('obtained tx\n' + pprint.pformat(tx))
goodtx, errmsg = self.verify_unsigned_tx(tx, offerinfo)
if not goodtx:
jlog.info('not a good tx, reason=' + errmsg)
return (False, errmsg)
jlog.info('goodtx')
sigs = []
utxos = offerinfo["utxos"]
our_inputs = {}
for index, ins in enumerate(tx['ins']):
utxo = ins['outpoint']['hash'] + ':' + str(
ins['outpoint']['index'])
if utxo not in utxos:
continue
script = self.wallet.addr_to_script(utxos[utxo]['address'])
amount = utxos[utxo]['value']
our_inputs[index] = (script, amount)
txs = self.wallet.sign_tx(btc.deserialize(unhexlify(txhex)),
our_inputs)
for index in our_inputs:
sigmsg = txs['ins'][index]['script']
if 'txinwitness' in txs['ins'][index]:
#We prepend the witness data since we want (sig, pub, scriptCode);
#also, the items in witness are not serialize_script-ed.
sigmsg = b''.join(
btc.serialize_script_unit(x)
for x in txs['ins'][index]['txinwitness']) + sigmsg
sigs.append(base64.b64encode(sigmsg))
return (True, sigs)