def f(x_pubkey):
if is_xpubkey(x_pubkey):
xpub, s = parse_xpubkey(x_pubkey)
else:
xpub = xpub_from_pubkey(0, bfh(x_pubkey))
s = []
node = self.ckd_public.deserialize(xpub)
return self.types.HDNodePathType(node=node,
address_n=s)
def electrum_tx_to_txtype(self, tx):
t = self.types.TransactionType()
d = deserialize(tx.raw)
t.version = d['version']
t.lock_time = d['lockTime']
inputs = self.tx_inputs(tx)
t.inputs.extend(inputs)
for vout in d['outputs']:
o = t.bin_outputs.add()
o.amount = vout['value']
o.script_pubkey = bfh(vout['scriptPubKey'])
return t
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_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 tx_inputs(self, tx, for_sig=False, segwit=False):
inputs = []
for txin in tx.inputs():
txinputtype = self.types.TxInputType()
if txin['type'] == 'coinbase':
prev_hash = "\0" * 32
prev_index = 0xffffffff # signed int -1
else:
if for_sig:
x_pubkeys = txin['x_pubkeys']
if len(x_pubkeys) == 1:
x_pubkey = x_pubkeys[0]
xpub, s = parse_xpubkey(x_pubkey)
xpub_n = self.client_class.expand_path(
self.xpub_path[xpub])
txinputtype.address_n.extend(xpub_n + s)
txinputtype.script_type = self.types.SPENDP2SHWITNESS if segwit else self.types.SPENDADDRESS
else:
def f(x_pubkey):
if is_xpubkey(x_pubkey):
xpub, s = parse_xpubkey(x_pubkey)
else:
xpub = xpub_from_pubkey(0, bfh(x_pubkey))
s = []
node = self.ckd_public.deserialize(xpub)
return self.types.HDNodePathType(node=node,
address_n=s)
pubkeys = map(f, x_pubkeys)
multisig = self.types.MultisigRedeemScriptType(
pubkeys=pubkeys,
signatures=map(lambda x: bfh(x)[:-1] if x else b'',
txin.get('signatures')),
m=txin.get('num_sig'),
)
script_type = self.types.SPENDP2SHWITNESS if segwit else self.types.SPENDMULTISIG
txinputtype = self.types.TxInputType(
script_type=script_type, multisig=multisig)
# find which key is mine
for x_pubkey in x_pubkeys:
if is_xpubkey(x_pubkey):
xpub, s = parse_xpubkey(x_pubkey)
if xpub in self.xpub_path:
xpub_n = self.client_class.expand_path(
self.xpub_path[xpub])
txinputtype.address_n.extend(xpub_n + s)
break
prev_hash = unhexlify(txin['prevout_hash'])
prev_index = txin['prevout_n']
if 'value' in txin:
txinputtype.amount = txin['value']
txinputtype.prev_hash = prev_hash
txinputtype.prev_index = prev_index
if 'scriptSig' in txin:
script_sig = bfh(txin['scriptSig'])
txinputtype.script_sig = script_sig
txinputtype.sequence = txin.get('sequence', 0xffffffff - 1)
inputs.append(txinputtype)
return inputs
def sign_transaction(self, tx, password):
if tx.is_complete():
return
client = self.get_client()
self.signing = True
inputs = []
inputsPaths = []
pubKeys = []
chipInputs = []
redeemScripts = []
signatures = []
preparedTrustedInputs = []
changePath = ""
changeAmount = None
output = None
outputAmount = 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)
inputs.append([
txin['prev_tx'].raw, txin['prevout_n'], redeemScript,
txin['prevout_hash'], signingPos,
txin.get('sequence', 0xffffffff - 1)
])
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
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")
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):
index, xpubs, m = info
changePath = self.get_derivation()[2:] + "/%d/%d" % index
changeAmount = amount
else:
output = address
outputAmount = amount
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:
txtmp = bitcoinTransaction(bfh(utxo[0]))
tmp = bfh(utxo[3])[::-1]
tmp += bfh(int_to_hex(utxo[1], 4))
tmp += txtmp.outputs[utxo[1]].amount
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()
self.get_client().enableAlternate2fa(False)
if segwitTransaction:
self.get_client().startUntrustedTransaction(
True, inputIndex, chipInputs, redeemScripts[inputIndex])
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])
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 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]
txin['signatures'][signingPos] = bh2u(signatures[i])
tx.raw = tx.serialize()
self.signing = False