def sign_transaction(self, keystore, tx, prev_tx, xpub_path):
self.prev_tx = prev_tx
self.xpub_path = xpub_path
client = self.get_client(keystore)
inputs = self.tx_inputs(tx, True, keystore.is_segwit())
outputs = self.tx_outputs(keystore.get_derivation(), tx,
keystore.is_segwit())
signed_tx = client.sign_tx(self.get_coin_name(),
inputs,
outputs,
lock_time=tx.locktime)[1]
raw = bh2u(signed_tx)
tx.update_signatures(raw)
def on_receive(self, keyhash, message):
self.print_error("signal arrived for", keyhash)
for key, _hash, window in self.keys:
if _hash == keyhash:
break
else:
self.print_error("keyhash not found")
return
wallet = window.wallet
if wallet.has_password():
password = window.password_dialog(
'An encrypted transaction was retrieved from cosigning pool.\nPlease enter your password to decrypt it.'
)
if not password:
return
else:
password = None
if not window.question(
_("An encrypted transaction was retrieved from cosigning pool.\nDo you want to open it now?"
)):
return
xprv = wallet.keystore.get_master_private_key(password)
if not xprv:
return
try:
k = bh2u(bitcoin.deserialize_xprv(xprv)[-1])
EC = bitcoin.EC_KEY(bfh(k))
message = bh2u(EC.decrypt_message(message))
except Exception as e:
traceback.print_exc(file=sys.stdout)
window.show_message(str(e))
return
self.listener.clear(keyhash)
tx = transaction.Transaction(message)
show_transaction(tx, window, prompt_if_unsaved=True)
def do_send(self, tx):
for window, xpub, K, _hash in self.cosigner_list:
if not self.cosigner_can_sign(tx, xpub):
continue
message = bitcoin.encrypt_message(bfh(tx.raw),
bh2u(K)).decode('ascii')
try:
server.put(_hash, message)
except Exception as e:
traceback.print_exc(file=sys.stdout)
window.show_message(
"Failed to send transaction to cosigning pool.")
return
window.show_message(
"Your transaction was sent to the cosigning pool.\nOpen your cosigner wallet to retrieve it."
)
def on_qr(self, data):
from electrum_zeny.bitcoin import base_decode, is_address
data = data.strip()
if is_address(data):
self.set_URI(data)
return
if data.startswith('bitzeny:'):
self.set_URI(data)
return
# try to decode transaction
from electrum_zeny.transaction import Transaction
from electrum_zeny.util import bh2u
try:
text = bh2u(base_decode(data, None, base=43))
tx = Transaction(text)
tx.deserialize()
except:
tx = None
if tx:
self.tx_dialog(tx)
return
# show error
self.show_error("Unable to decode QR data")
def update(self, window):
wallet = window.wallet
if type(wallet) != Multisig_Wallet:
return
if self.listener is None:
self.print_error("starting listener")
self.listener = Listener(self)
self.listener.start()
elif self.listener:
self.print_error("shutting down listener")
self.listener.stop()
self.listener = None
self.keys = []
self.cosigner_list = []
for key, keystore in wallet.keystores.items():
xpub = keystore.get_master_public_key()
K = bitcoin.deserialize_xpub(xpub)[-1]
_hash = bh2u(bitcoin.Hash(K))
if not keystore.is_watching_only():
self.keys.append((key, _hash, window))
else:
self.cosigner_list.append((window, xpub, K, _hash))
if self.listener:
self.listener.set_keyhashes([t[1] for t in self.keys])