def update(features):
self.features = features
set_label_enabled()
bl_hash = bh2u(features.bootloader_hash)
bl_hash = "\n".join([bl_hash[:32], bl_hash[32:]])
noyes = [_("No"), _("Yes")]
endis = [_("Enable Passphrases"), _("Disable Passphrases")]
disen = [_("Disabled"), _("Enabled")]
setchange = [_("Set a PIN"), _("Change PIN")]
version = "%d.%d.%d" % (features.major_version,
features.minor_version,
features.patch_version)
coins = ", ".join(coin.coin_name for coin in features.coins)
device_label.setText(features.label)
pin_set_label.setText(noyes[features.pin_protection])
passphrases_label.setText(disen[features.passphrase_protection])
bl_hash_label.setText(bl_hash)
label_edit.setText(features.label)
device_id_label.setText(features.device_id)
initialized_label.setText(noyes[features.initialized])
version_label.setText(version)
coins_label.setText(coins)
clear_pin_button.setVisible(features.pin_protection)
clear_pin_warning.setVisible(features.pin_protection)
pin_button.setText(setchange[features.pin_protection])
pin_msg.setVisible(not features.pin_protection)
passphrase_button.setText(endis[features.passphrase_protection])
language_label.setText(features.language)
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 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.get_script_gen())
outputs = self.tx_outputs(keystore.get_derivation(), tx,
keystore.get_script_gen())
signatures = client.sign_tx(self.get_coin_name(),
inputs,
outputs,
lock_time=tx.locktime)[0]
signatures = [(bh2u(x) + '01') for x in signatures]
tx.update_signatures(signatures)
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 isinstance(wallet.keystore, keystore.Hardware_KeyStore):
window.show_warning(
_('An encrypted transaction was retrieved from cosigning pool.'
) + '\n' +
_('However, hardware wallets do not support message decryption, '
'which makes them not compatible with the current design of cosigner pool.'
))
return
elif wallet.has_keystore_encryption():
password = window.password_dialog(
_('An encrypted transaction was retrieved from cosigning pool.'
) + '\n' + _('Please 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."
) + '\n' + _("Do you want to open it now?")):
return
xprv = wallet.keystore.get_master_private_key(password)
if not xprv:
return
try:
k = bitcoin.deserialize_xprv(xprv)[-1]
EC = ecc.ECPrivkey(k)
message = bh2u(EC.decrypt_message(message))
except Exception as e:
traceback.print_exc(file=sys.stdout)
window.show_error(_('Error decrypting message') + ':\n' + str(e))
return
self.listener.clear(keyhash)
tx = transaction.Transaction(message)
show_transaction(tx, window, prompt_if_unsaved=True)
def on_qr(self, data):
from electrum_vtc.bitcoin import base_decode, is_address
data = data.strip()
if is_address(data):
self.set_URI(data)
return
if data.startswith('vertcoin:'):
self.set_URI(data)
return
# try to decode transaction
from electrum_vtc.transaction import Transaction
from electrum_vtc.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])
def sign_transaction(self, tx, password):
if tx.is_complete():
return
client = self.get_client()
inputs = []
inputsPaths = []
pubKeys = []
chipInputs = []
redeemScripts = []
signatures = []
preparedTrustedInputs = []
changePath = ""
output = None
p2shTransaction = False
segwitTransaction = False
pin = ""
self.get_client(
) # prompt for the PIN before displaying the dialog if necessary
# Fetch inputs of the transaction to sign
derivations = self.get_tx_derivations(tx)
for txin in tx.inputs():
if txin['type'] == 'coinbase':
self.give_error(
"Coinbase not supported") # should never happen
if txin['type'] in ['p2sh']:
p2shTransaction = True
if txin['type'] in ['p2wpkh-p2sh', 'p2wsh-p2sh']:
if not self.get_client_electrum().supports_segwit():
self.give_error(MSG_NEEDS_FW_UPDATE_SEGWIT)
segwitTransaction = True
if txin['type'] in ['p2wpkh', 'p2wsh']:
if not self.get_client_electrum().supports_native_segwit():
self.give_error(MSG_NEEDS_FW_UPDATE_SEGWIT)
segwitTransaction = True
pubkeys, x_pubkeys = tx.get_sorted_pubkeys(txin)
for i, x_pubkey in enumerate(x_pubkeys):
if x_pubkey in derivations:
signingPos = i
s = derivations.get(x_pubkey)
hwAddress = "%s/%d/%d" % (self.get_derivation()[2:], s[0],
s[1])
break
else:
self.give_error("No matching x_key for sign_transaction"
) # should never happen
redeemScript = Transaction.get_preimage_script(txin)
txin_prev_tx = txin.get('prev_tx')
if txin_prev_tx is None and not Transaction.is_segwit_input(txin):
raise Exception(
_('Offline signing with {} is not supported for legacy inputs.'
).format(self.device))
txin_prev_tx_raw = txin_prev_tx.raw if txin_prev_tx else None
inputs.append([
txin_prev_tx_raw, txin['prevout_n'], redeemScript,
txin['prevout_hash'], signingPos,
txin.get('sequence', 0xffffffff - 1),
txin.get('value')
])
inputsPaths.append(hwAddress)
pubKeys.append(pubkeys)
# Sanity check
if p2shTransaction:
for txin in tx.inputs():
if txin['type'] != 'p2sh':
self.give_error(
"P2SH / regular input mixed in same transaction not supported"
) # should never happen
txOutput = var_int(len(tx.outputs()))
for txout in tx.outputs():
output_type, addr, amount = txout
txOutput += int_to_hex(amount, 8)
script = tx.pay_script(output_type, addr)
txOutput += var_int(len(script) // 2)
txOutput += script
txOutput = bfh(txOutput)
# Recognize outputs
# - only one output and one change is authorized (for hw.1 and nano)
# - at most one output can bypass confirmation (~change) (for all)
if not p2shTransaction:
if not self.get_client_electrum().supports_multi_output():
if len(tx.outputs()) > 2:
self.give_error(
"Transaction with more than 2 outputs not supported")
has_change = False
any_output_on_change_branch = is_any_tx_output_on_change_branch(tx)
for _type, address, amount in tx.outputs():
assert _type == TYPE_ADDRESS
info = tx.output_info.get(address)
if (info is not None) and len(tx.outputs()) > 1 \
and not has_change:
index, xpubs, m = info
on_change_branch = index[0] == 1
# prioritise hiding outputs on the 'change' branch from user
# because no more than one change address allowed
if on_change_branch == any_output_on_change_branch:
changePath = self.get_derivation(
)[2:] + "/%d/%d" % index
has_change = True
else:
output = address
else:
output = address
self.handler.show_message(
_("Confirm Transaction on your Ledger device..."))
try:
# Get trusted inputs from the original transactions
for utxo in inputs:
sequence = int_to_hex(utxo[5], 4)
if segwitTransaction:
tmp = bfh(utxo[3])[::-1]
tmp += bfh(int_to_hex(utxo[1], 4))
tmp += bfh(int_to_hex(utxo[6], 8)) # txin['value']
chipInputs.append({
'value': tmp,
'witness': True,
'sequence': sequence
})
redeemScripts.append(bfh(utxo[2]))
elif not p2shTransaction:
txtmp = bitcoinTransaction(bfh(utxo[0]))
trustedInput = self.get_client().getTrustedInput(
txtmp, utxo[1])
trustedInput['sequence'] = sequence
chipInputs.append(trustedInput)
redeemScripts.append(txtmp.outputs[utxo[1]].script)
else:
tmp = bfh(utxo[3])[::-1]
tmp += bfh(int_to_hex(utxo[1], 4))
chipInputs.append({'value': tmp, 'sequence': sequence})
redeemScripts.append(bfh(utxo[2]))
# Sign all inputs
firstTransaction = True
inputIndex = 0
rawTx = tx.serialize_to_network()
self.get_client().enableAlternate2fa(False)
if segwitTransaction:
self.get_client().startUntrustedTransaction(
True, inputIndex, chipInputs, redeemScripts[inputIndex])
if changePath:
# we don't set meaningful outputAddress, amount and fees
# as we only care about the alternateEncoding==True branch
outputData = self.get_client().finalizeInput(
b'', 0, 0, changePath, bfh(rawTx))
else:
outputData = self.get_client().finalizeInputFull(txOutput)
outputData['outputData'] = txOutput
transactionOutput = outputData['outputData']
if outputData['confirmationNeeded']:
outputData['address'] = output
self.handler.finished()
pin = self.handler.get_auth(
outputData
) # does the authenticate dialog and returns pin
if not pin:
raise UserWarning()
if pin != 'paired':
self.handler.show_message(
_("Confirmed. Signing Transaction..."))
while inputIndex < len(inputs):
singleInput = [chipInputs[inputIndex]]
self.get_client().startUntrustedTransaction(
False, 0, singleInput, redeemScripts[inputIndex])
inputSignature = self.get_client().untrustedHashSign(
inputsPaths[inputIndex], pin, lockTime=tx.locktime)
inputSignature[0] = 0x30 # force for 1.4.9+
signatures.append(inputSignature)
inputIndex = inputIndex + 1
else:
while inputIndex < len(inputs):
self.get_client().startUntrustedTransaction(
firstTransaction, inputIndex, chipInputs,
redeemScripts[inputIndex])
if changePath:
# we don't set meaningful outputAddress, amount and fees
# as we only care about the alternateEncoding==True branch
outputData = self.get_client().finalizeInput(
b'', 0, 0, changePath, bfh(rawTx))
else:
outputData = self.get_client().finalizeInputFull(
txOutput)
outputData['outputData'] = txOutput
if firstTransaction:
transactionOutput = outputData['outputData']
if outputData['confirmationNeeded']:
outputData['address'] = output
self.handler.finished()
pin = self.handler.get_auth(
outputData
) # does the authenticate dialog and returns pin
if not pin:
raise UserWarning()
if pin != 'paired':
self.handler.show_message(
_("Confirmed. Signing Transaction..."))
else:
# Sign input with the provided PIN
inputSignature = self.get_client().untrustedHashSign(
inputsPaths[inputIndex], pin, lockTime=tx.locktime)
inputSignature[0] = 0x30 # force for 1.4.9+
signatures.append(inputSignature)
inputIndex = inputIndex + 1
if pin != 'paired':
firstTransaction = False
except UserWarning:
self.handler.show_error(_('Cancelled by user'))
return
except BTChipException as e:
if e.sw == 0x6985: # cancelled by user
return
elif e.sw == 0x6982:
raise # pin lock. decorator will catch it
else:
traceback.print_exc(file=sys.stderr)
self.give_error(e, True)
except BaseException as e:
traceback.print_exc(file=sys.stdout)
self.give_error(e, True)
finally:
self.handler.finished()
for i, txin in enumerate(tx.inputs()):
signingPos = inputs[i][4]
tx.add_signature_to_txin(i, signingPos, bh2u(signatures[i]))
tx.raw = tx.serialize()