def signTxSign(self, ctrl):
self.tx_raw = None
with self.lock:
starting = True
curr_input_signed = 0
# sign all inputs on Ledger and add inputs in the self.new_transaction object for serialization
for idx, new_input in enumerate(self.arg_inputs):
self.chip.startUntrustedTransaction(starting, idx, self.trusted_inputs, new_input['locking_script'])
self.chip.finalizeInputFull(self.all_outputs_raw)
sig = self.chip.untrustedHashSign(new_input['bip32_path'], lockTime=0)
new_input['signature'] = sig
inputTx = bitcoinInput()
inputTx.prevOut = bytearray.fromhex(new_input['txid'])[::-1] + int.to_bytes(new_input['outputIndex'], 4, byteorder='little')
inputTx.script = bytearray([len(sig)]) + sig + bytearray([0x21]) + new_input['pubkey']
inputTx.sequence = bytearray([0xFF, 0xFF, 0xFF, 0xFF])
self.new_transaction.inputs.append(inputTx)
starting = False
# signature percent emitted
curr_input_signed += 1
completion = int(100*curr_input_signed / len(self.arg_inputs))
self.sig_progress.emit(completion)
self.new_transaction.lockTime = bytearray([0, 0, 0, 0])
self.tx_raw = bytearray(self.new_transaction.serialize())
self.sig_progress.emit(100)
def signTxSign(self, ctrl):
self.lock.acquire()
try:
starting = True
curr_input_signed = 0
# sign all inputs on Ledger and add inputs in the self.new_transaction object for serialization
for idx, new_input in enumerate(self.arg_inputs):
self.chip.startUntrustedTransaction(starting, idx, self.trusted_inputs, new_input['locking_script'])
self.chip.finalizeInputFull(self.all_outputs_raw)
sig = self.chip.untrustedHashSign(new_input['bip32_path'], lockTime=0)
new_input['signature'] = sig
inputTx = bitcoinInput()
inputTx.prevOut = bytearray.fromhex(new_input['txid'])[::-1] + int.to_bytes(new_input['outputIndex'], 4, byteorder='little')
inputTx.script = bytearray([len(sig)]) + sig + bytearray([0x21]) + new_input['pubkey']
inputTx.sequence = bytearray([0xFF, 0xFF, 0xFF, 0xFF])
self.new_transaction.inputs.append(inputTx)
starting = False
# signature percent emitted
curr_input_signed += 1
completion = int(100*curr_input_signed / len(self.arg_inputs))
self.sig_progress.emit(completion)
self.new_transaction.lockTime = bytearray([0, 0, 0, 0])
self.tx_raw = bytearray(self.new_transaction.serialize())
self.sig_progress.emit(100)
except TypeError as te:
printDbg(str(te))
self.tx_raw = None
except Exception as e:
if e.sw != 0x6985:
self.status = 0
printException(getCallerName(), getFunctionName(), e.message, e.args)
self.tx_raw = None
finally:
self.lock.release()
if self.status == 0:
self.dongle.close()
self.initDevice()
def signTxSign(self, ctrl):
self.lock.acquire()
try:
starting = True
# sign all inputs on Ledger and add inputs in the self.new_transaction object for serialization
for idx, new_input in enumerate(self.arg_inputs):
self.chip.startUntrustedTransaction(
starting, idx, self.trusted_inputs,
new_input['locking_script'])
self.chip.finalizeInputFull(self.all_outputs_raw)
sig = self.chip.untrustedHashSign(new_input['bip32_path'],
lockTime=0)
new_input['signature'] = sig
inputTx = bitcoinInput()
inputTx.prevOut = bytearray.fromhex(
new_input['txid'])[::-1] + int.to_bytes(
new_input['outputIndex'], 4, byteorder='little')
inputTx.script = bytearray([len(sig)]) + sig + bytearray(
[0x21]) + new_input['pubkey']
inputTx.sequence = bytearray([0xFF, 0xFF, 0xFF, 0xFF])
self.new_transaction.inputs.append(inputTx)
starting = False
self.new_transaction.lockTime = bytearray([0, 0, 0, 0])
self.tx_raw = bytearray(self.new_transaction.serialize())
except Exception as e:
printException(getCallerName(), getFunctionName(),
"Signature Exception", e.args)
self.tx_raw = None
finally:
self.lock.release()
def signTx(self, device, bip32_path, utxos_to_spend, dest_address, tx_fee,
rawtransactions):
# For each UTXO create a Ledger 'trusted input'
self.trusted_inputs = []
# https://klmoney.wordpress.com/bitcoin-dissecting-transactions-part-2-building-a-transaction-by-hand)
self.arg_inputs = []
self.amount = 0
for idx, utxo in enumerate(utxos_to_spend):
self.amount += int(utxo['value'])
raw_tx = bytearray.fromhex(rawtransactions[utxo['tx_hash']])
if not raw_tx:
raise Exception("Can't find raw transaction for txid: " +
rawtransactions[utxo['tx_hash']])
# parse the raw transaction, so that we can extract the UTXO locking script we refer to
prev_transaction = bitcoinTransaction(raw_tx)
utxo_tx_index = utxo['tx_ouput_n']
if utxo_tx_index < 0 or utxo_tx_index > len(
prev_transaction.outputs):
raise Exception('Incorrect value of outputIndex for UTXO %s' %
str(idx))
trusted_input = self.device.chip.getTrustedInput(
prev_transaction, utxo_tx_index)
self.trusted_inputs.append(trusted_input)
# Hash check
curr_pubkey = compress_public_key(
device.chip.getWalletPublicKey(bip32_path)['publicKey'])
pubkey_hash = bin_hash160(curr_pubkey)
pubkey_hash_from_script = extract_pkh_from_locking_script(
prev_transaction.outputs[utxo_tx_index].script)
if pubkey_hash != pubkey_hash_from_script:
text = "Error: different public key hashes for the BIP32 path and the UTXO"
text += "locking script. Your signed transaction will not be validated by the network.\n"
text += "pubkey_hash: %s\n" % str(pubkey_hash)
text += "pubkey_hash_from_script: %s\n" % str(
pubkey_hash_from_script)
print(text)
self.arg_inputs.append({
'locking_script':
prev_transaction.outputs[utxo['tx_ouput_n']].script,
'pubkey':
curr_pubkey,
'bip32_path':
bip32_path,
'outputIndex':
utxo['tx_ouput_n'],
'txid':
utxo['tx_hash']
})
self.amount -= int(tx_fee)
self.amount = int(self.amount)
arg_outputs = [{
'address': dest_address,
'valueSat': self.amount
}] # there will be multiple outputs soon
self.new_transaction = bitcoinTransaction(
) # new transaction object to be used for serialization at the last stage
self.new_transaction.version = bytearray([0x01, 0x00, 0x00, 0x00])
try:
for o in arg_outputs:
output = bitcoinOutput()
output.script = compose_tx_locking_script(o['address'])
output.amount = int.to_bytes(o['valueSat'],
8,
byteorder='little')
self.new_transaction.outputs.append(output)
except Exception:
raise
# join all outputs - will be used by Ledger for signing transaction
self.all_outputs_raw = self.new_transaction.serializeOutputs()
starting = True
# sign all inputs on Ledger and add inputs in the self.new_transaction object for serialization
for idx, new_input in enumerate(self.arg_inputs):
device.chip.startUntrustedTransaction(starting, idx,
self.trusted_inputs,
new_input['locking_script'])
device.chip.finalizeInputFull(self.all_outputs_raw)
sig = device.chip.untrustedHashSign(new_input['bip32_path'],
lockTime=0)
new_input['signature'] = sig
inputTx = bitcoinInput()
inputTx.prevOut = bytearray.fromhex(
new_input['txid'])[::-1] + int.to_bytes(
new_input['outputIndex'], 4, byteorder='little')
inputTx.script = bytearray([len(sig)]) + sig + bytearray(
[0x21]) + new_input['pubkey']
inputTx.sequence = bytearray([0xFF, 0xFF, 0xFF, 0xFF])
self.new_transaction.inputs.append(inputTx)
starting = False
self.new_transaction.lockTime = bytearray([0, 0, 0, 0])
self.tx_raw = bytearray(self.new_transaction.serialize())
if self.tx_raw is not None:
return (self.tx_raw, str(round(self.amount / 1e8, 8)))
else:
# transaction refused by user
return (None, "")