def htlc_tx(self, htlc, htlc_output_index, amount_msat, htlc_payment_preimage, remote_htlc_sig, success, cltv_timeout, local_feerate_per_kw, our_commit_tx):
_script, our_htlc_tx_output = make_htlc_tx_output(
amount_msat=amount_msat,
local_feerate=local_feerate_per_kw,
revocationpubkey=local_revocation_pubkey,
local_delayedpubkey=local_delayedpubkey,
success=success,
to_self_delay=local_delay)
our_htlc_tx_inputs = make_htlc_tx_inputs(
htlc_output_txid=our_commit_tx.txid(),
htlc_output_index=htlc_output_index,
amount_msat=amount_msat,
witness_script=bh2u(htlc))
our_htlc_tx = make_htlc_tx(
cltv_expiry=cltv_timeout,
inputs=our_htlc_tx_inputs,
output=our_htlc_tx_output)
local_sig = our_htlc_tx.sign_txin(0, local_privkey[:-1])
our_htlc_tx_witness = make_htlc_tx_witness(
remotehtlcsig=bfh(remote_htlc_sig) + b"\x01", # 0x01 is SIGHASH_ALL
localhtlcsig=bfh(local_sig),
payment_preimage=htlc_payment_preimage if success else b'', # will put 00 on witness if timeout
witness_script=htlc)
our_htlc_tx._inputs[0]['witness'] = bh2u(our_htlc_tx_witness)
return str(our_htlc_tx)
def mock_fork(self, bad_header):
forkpoint = bad_header['block_height']
b = blockchain.Blockchain(config=self.config,
forkpoint=forkpoint,
parent=None,
forkpoint_hash=bh2u(sha256(str(forkpoint))),
prev_hash=bh2u(sha256(str(forkpoint - 1))))
return b
def __init__(self, window: 'ElectrumWindow', chan_id: bytes):
super().__init__(window)
# initialize instance fields
self.window = window
chan = self.chan = window.wallet.lnworker.channels[chan_id]
self.format = lambda msat: window.format_amount_and_units(msat / 1000)
# connect signals with slots
self.ln_payment_completed.connect(self.do_ln_payment_completed)
self.htlc_added.connect(self.do_htlc_added)
# register callbacks for updating
window.network.register_callback(self.ln_payment_completed.emit, ['ln_payment_completed'])
window.network.register_callback(self.htlc_added.emit, ['htlc_added'])
# set attributes of QDialog
self.setWindowTitle(_('Channel Details'))
self.setMinimumSize(800, 400)
# add layouts
vbox = QtWidgets.QVBoxLayout(self)
form_layout = QtWidgets.QFormLayout(None)
vbox.addLayout(form_layout)
# add form content
form_layout.addRow(_('Node ID:'), SelectableLabel(bh2u(chan.node_id)))
form_layout.addRow(_('Channel ID:'), SelectableLabel(bh2u(chan.channel_id)))
funding_label_text = f'<a href=click_destination>{chan.funding_outpoint.txid}</a>:{chan.funding_outpoint.output_index}'
form_layout.addRow(_('Funding Outpoint:'), LinkedLabel(funding_label_text, self.show_tx))
form_layout.addRow(_('Short Channel ID:'), SelectableLabel(format_short_channel_id(chan.short_channel_id)))
self.received_label = SelectableLabel()
form_layout.addRow(_('Received (mSAT):'), self.received_label)
self.sent_label = SelectableLabel()
form_layout.addRow(_('Sent (mSAT):'), self.sent_label)
self.htlc_minimum_msat = SelectableLabel(str(chan.config[REMOTE].htlc_minimum_msat))
form_layout.addRow(_('Minimum HTLC value accepted by peer (mSAT):'), self.htlc_minimum_msat)
self.max_htlcs = SelectableLabel(str(chan.config[REMOTE].max_accepted_htlcs))
form_layout.addRow(_('Maximum number of concurrent HTLCs accepted by peer:'), self.max_htlcs)
self.max_htlc_value = SelectableLabel(self.window.format_amount_and_units(chan.config[REMOTE].max_htlc_value_in_flight_msat / 1000))
form_layout.addRow(_('Maximum value of in-flight HTLCs accepted by peer:'), self.max_htlc_value)
self.dust_limit = SelectableLabel(self.window.format_amount_and_units(chan.config[REMOTE].dust_limit_sat))
form_layout.addRow(_('Remote dust limit:'), self.dust_limit)
self.reserve = SelectableLabel(self.window.format_amount_and_units(chan.config[REMOTE].reserve_sat))
form_layout.addRow(_('Remote channel reserve:'), self.reserve)
# add htlc tree view to vbox (wouldn't scale correctly in QFormLayout)
form_layout.addRow(_('Payments (HTLCs):'), None)
w = QtWidgets.QTreeView(self)
htlc_dict = chan.get_payments()
w.setModel(self.make_model(htlc_dict))
w.header().setSectionResizeMode(0, QtWidgets.QHeaderView.ResizeToContents)
vbox.addWidget(w)
# initialize sent/received fields
self.update_sent_received()
def sign_and_insert_remote_sig(self, tx, remote_pubkey, remote_signature, pubkey, privkey):
assert type(remote_pubkey) is bytes
assert len(remote_pubkey) == 33
assert type(remote_signature) is str
assert type(pubkey) is bytes
assert type(privkey) is bytes
assert len(pubkey) == 33
assert len(privkey) == 33
tx.sign({bh2u(pubkey): (privkey[:-1], True)})
pubkeys, _x_pubkeys = tx.get_sorted_pubkeys(tx.inputs()[0])
index_of_pubkey = pubkeys.index(bh2u(remote_pubkey))
tx._inputs[0]["signatures"][index_of_pubkey] = remote_signature + "01"
tx.raw = None
def test_mnemonic_to_seed_basic(self):
# note: not a valid electrum seed
seed = mnemonic.Mnemonic.mnemonic_to_seed(mnemonic='foobar',
passphrase='none')
self.assertEqual(
'741b72fd15effece6bfe5a26a52184f66811bd2be363190e07a42cca442b1a5bb22b3ad0eb338197287e6d314866c7fba863ac65d3f156087a5052ebc7157fce',
bh2u(seed))
def append_lnaddr(self, it: HTLCItem, lnaddr: LnAddr):
invoice = HTLCItem(_('Invoice'))
invoice.appendRow([HTLCItem(_('Remote node public key')), HTLCItem(bh2u(lnaddr.pubkey.serialize()))])
invoice.appendRow([HTLCItem(_('Amount in sat')), HTLCItem(str(lnaddr.amount * COIN))]) # might have a comma because mSAT!
invoice.appendRow([HTLCItem(_('Description')), HTLCItem(dict(lnaddr.tags).get('d', _('N/A')))])
invoice.appendRow([HTLCItem(_('Date')), HTLCItem(format_time(lnaddr.date))])
it.appendRow([invoice])
def gen_random_versioned_seed(cls):
version = cls.LATEST_VERSION
hex_seed = bh2u(os.urandom(16))
checksum = cls.code_hashid(version + hex_seed)
return VersionedSeed(version=version.upper(),
seed=hex_seed.upper(),
checksum=checksum.upper())
def update(features):
self.features = features
set_label_enabled()
if features.bootloader_hash:
bl_hash = bh2u(features.bootloader_hash)
bl_hash = "\n".join([bl_hash[:32], bl_hash[32:]])
else:
bl_hash = "N/A"
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)
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)
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 update(self, window):
wallet = window.wallet
if type(wallet) != Multisig_Wallet:
return
if self.listener is None:
self.logger.info("starting listener")
self.listener = Listener(self)
self.listener.start()
elif self.listener:
self.logger.info("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()
pubkey = BIP32Node.from_xkey(xpub).eckey.get_public_key_bytes(
compressed=True)
_hash = bh2u(crypto.sha256d(pubkey))
if not keystore.is_watching_only():
self.keys.append((key, _hash, window))
else:
self.cosigner_list.append((window, xpub, pubkey, _hash))
if self.listener:
self.listener.set_keyhashes([t[1] for t in self.keys])
def on_qr(self, data):
from electrum_gzro.bitcoin import base_decode, is_address
data = data.strip()
if is_address(data):
self.set_URI(data)
return
if data.startswith('gravity:'):
self.set_URI(data)
return
if data.startswith('ln'):
self.set_ln_invoice(data)
return
# try to decode transaction
from electrum_gzro.transaction import Transaction
from electrum_gzro.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 sign_transaction(self, tx: Transaction, password):
# Build a PSBT in memory, upload it for signing.
# - we can also work offline (without paired device present)
if tx.is_complete():
return
assert self.my_wallet, "Not clear which wallet associated with this Coldcard"
client = self.get_client()
assert client.dev.master_fingerprint == self.ckcc_xfp
# makes PSBT required
raw_psbt = build_psbt(tx, self.my_wallet)
cc_finalize = not (type(self.my_wallet) is Multisig_Wallet)
try:
try:
self.handler.show_message("Authorize Transaction...")
client.sign_transaction_start(raw_psbt, cc_finalize)
while 1:
# How to kill some time, without locking UI?
time.sleep(0.250)
resp = client.sign_transaction_poll()
if resp is not None:
break
rlen, rsha = resp
# download the resulting txn.
raw_resp = client.download_file(rlen, rsha)
finally:
self.handler.finished()
except (CCUserRefused, CCBusyError) as exc:
self.logger.info(f'Did not sign: {exc}')
self.handler.show_error(str(exc))
return
except BaseException as e:
self.logger.exception('')
self.give_error(e, True)
return
if cc_finalize:
# We trust the coldcard to re-serialize final transaction ready to go
tx.update(bh2u(raw_resp))
else:
# apply partial signatures back into txn
psbt = BasicPSBT()
psbt.parse(raw_resp, client.label())
merge_sigs_from_psbt(tx, psbt)
def open(self, *args, **kwargs):
super(LightningOpenChannelDialog, self).open(*args, **kwargs)
if self.lnaddr:
fee = self.app.electrum_config.fee_per_kb()
if not fee:
fee = config.FEERATE_FALLBACK_STATIC_FEE
self.amount = self.app.format_amount_and_units(self.lnaddr.amount * COIN + fee * 2)
self.pubkey = bh2u(self.lnaddr.pubkey.serialize())
if self.msg:
self.app.show_info(self.msg)
def test_mnemonic_to_seed(self):
for test_name, test in SEED_TEST_CASES.items():
if test.words_hex is not None:
self.assertEqual(test.words_hex,
bh2u(test.words.encode('utf8')),
msg=test_name)
self.assertTrue(is_new_seed(test.words, prefix=test.seed_version),
msg=test_name)
m = mnemonic.Mnemonic(lang=test.lang)
if test.entropy is not None:
self.assertEqual(test.entropy,
m.mnemonic_decode(test.words),
msg=test_name)
if test.passphrase_hex is not None:
self.assertEqual(test.passphrase_hex,
bh2u(test.passphrase.encode('utf8')),
msg=test_name)
seed = mnemonic.Mnemonic.mnemonic_to_seed(
mnemonic=test.words, passphrase=test.passphrase)
self.assertEqual(test.bip32_seed, bh2u(seed), msg=test_name)
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)
outputs = self.tx_outputs(keystore.get_derivation(), tx)
signatures = client.sign_tx(self.get_coin_name(),
inputs,
outputs,
lock_time=tx.locktime,
version=tx.version)[0]
signatures = [(bh2u(x) + '01') for x in signatures]
tx.update_signatures(signatures)
def new_channel_dialog(self):
lnworker = self.parent.wallet.lnworker
d = WindowModalDialog(self.parent, _('Open Channel'))
d.setMinimumWidth(700)
vbox = QVBoxLayout(d)
h = QGridLayout()
local_nodeid = QLineEdit()
local_nodeid.setText(bh2u(lnworker.node_keypair.pubkey))
local_nodeid.setReadOnly(True)
local_nodeid.setCursorPosition(0)
remote_nodeid = QLineEdit()
local_amt_inp = BTCAmountEdit(self.parent.get_decimal_point)
local_amt_inp.setAmount(200000)
push_amt_inp = BTCAmountEdit(self.parent.get_decimal_point)
push_amt_inp.setAmount(0)
h.addWidget(QLabel(_('Your Node ID')), 0, 0)
h.addWidget(local_nodeid, 0, 1)
h.addWidget(
QLabel(_('Remote Node ID or connection string or invoice')), 1, 0)
h.addWidget(remote_nodeid, 1, 1)
h.addWidget(QLabel('Local amount'), 2, 0)
h.addWidget(local_amt_inp, 2, 1)
h.addWidget(QLabel('Push amount'), 3, 0)
h.addWidget(push_amt_inp, 3, 1)
vbox.addLayout(h)
ok_button = OkButton(d)
ok_button.setDefault(True)
vbox.addLayout(Buttons(CancelButton(d), ok_button))
suggestion = lnworker.suggest_peer() or b''
remote_nodeid.setText(bh2u(suggestion))
remote_nodeid.setCursorPosition(0)
if not d.exec_():
return
local_amt = local_amt_inp.get_amount()
push_amt = push_amt_inp.get_amount()
connect_contents = str(remote_nodeid.text()).strip()
self.parent.open_channel(connect_contents, local_amt, push_amt)
def sign_transaction(self, keystore, tx, prev_tx, xpub_path):
prev_tx = {
bfh(txhash): self.electrum_tx_to_txtype(tx, xpub_path)
for txhash, tx in prev_tx.items()
}
client = self.get_client(keystore)
inputs = self.tx_inputs(tx, xpub_path, True)
outputs = self.tx_outputs(keystore.get_derivation(), tx)
details = SignTx(lock_time=tx.locktime, version=tx.version)
signatures, _ = client.sign_tx(self.get_coin_name(),
inputs,
outputs,
details=details,
prev_txes=prev_tx)
signatures = [(bh2u(x) + '01') for x in signatures]
tx.update_signatures(signatures)
def on_receive(self, keyhash, message):
self.logger.info(f"signal arrived for {keyhash}")
for key, _hash, window in self.keys:
if _hash == keyhash:
break
else:
self.logger.info("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:
privkey = BIP32Node.from_xkey(xprv).eckey
message = bh2u(privkey.decrypt_message(message))
except Exception as e:
self.logger.exception('')
window.show_error(_('Error decrypting message') + ':\n' + repr(e))
return
self.listener.clear(keyhash)
tx = transaction.Transaction(message)
show_transaction(tx, window, prompt_if_unsaved=True)
def test_push_script(self):
# https://github.com/bitcoin/bips/blob/master/bip-0062.mediawiki#push-operators
self.assertEqual(push_script(''), bh2u(bytes([opcodes.OP_0])))
self.assertEqual(push_script('07'), bh2u(bytes([opcodes.OP_7])))
self.assertEqual(push_script('10'), bh2u(bytes([opcodes.OP_16])))
self.assertEqual(push_script('81'), bh2u(bytes([opcodes.OP_1NEGATE])))
self.assertEqual(push_script('11'), '0111')
self.assertEqual(push_script(75 * '42'), '4b' + 75 * '42')
self.assertEqual(
push_script(76 * '42'),
bh2u(bytes([opcodes.OP_PUSHDATA1]) + bfh('4c' + 76 * '42')))
self.assertEqual(
push_script(100 * '42'),
bh2u(bytes([opcodes.OP_PUSHDATA1]) + bfh('64' + 100 * '42')))
self.assertEqual(
push_script(255 * '42'),
bh2u(bytes([opcodes.OP_PUSHDATA1]) + bfh('ff' + 255 * '42')))
self.assertEqual(
push_script(256 * '42'),
bh2u(bytes([opcodes.OP_PUSHDATA2]) + bfh('0001' + 256 * '42')))
self.assertEqual(
push_script(520 * '42'),
bh2u(bytes([opcodes.OP_PUSHDATA2]) + bfh('0802' + 520 * '42')))
def format_fields(self, chan):
labels = {}
for subject in (REMOTE, LOCAL):
bal_minus_htlcs = chan.balance_minus_outgoing_htlcs(
subject) // 1000
label = self.parent.format_amount(bal_minus_htlcs)
other = subject.inverted()
bal_other = chan.balance(other) // 1000
bal_minus_htlcs_other = chan.balance_minus_outgoing_htlcs(
other) // 1000
if bal_other != bal_minus_htlcs_other:
label += ' (+' + self.parent.format_amount(
bal_other - bal_minus_htlcs_other) + ')'
labels[subject] = label
return [
format_short_channel_id(chan.short_channel_id),
bh2u(chan.node_id), labels[LOCAL], labels[REMOTE],
chan.get_state()
]
def sign_transaction(self, tx: Transaction, password):
if tx.is_complete():
return
client = self.get_client()
inputs = []
inputsPaths = []
pubKeys = []
chipInputs = []
redeemScripts = []
signatures = []
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 UserFacingException(_('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 o in tx.outputs():
output_type, addr, amount = o.type, o.address, o.value
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 o in tx.outputs():
assert o.type == TYPE_ADDRESS
info = tx.output_info.get(o.address)
if (info is not None) and len(tx.outputs()) > 1 \
and not has_change:
index = info.address_index
# prioritise hiding outputs on the 'change' branch from user
# because no more than one change address allowed
if info.is_change == any_output_on_change_branch:
changePath = self.get_derivation()[2:] + "/%d/%d"%index
has_change = True
else:
output = o.address
else:
output = o.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], version=tx.version)
# 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))
outputData['outputData'] = txOutput
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()
self.handler.show_message(_("Confirmed. Signing Transaction..."))
while inputIndex < len(inputs):
singleInput = [ chipInputs[inputIndex] ]
self.get_client().startUntrustedTransaction(False, 0,
singleInput, redeemScripts[inputIndex], version=tx.version)
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], version=tx.version)
# 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))
outputData['outputData'] = txOutput
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()
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
firstTransaction = False
except UserWarning:
self.handler.show_error(_('Cancelled by user'))
return
except BTChipException as e:
if e.sw in (0x6985, 0x6d00): # cancelled by user
return
elif e.sw == 0x6982:
raise # pin lock. decorator will catch it
else:
self.logger.exception('')
self.give_error(e, True)
except BaseException as e:
self.logger.exception('')
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()
def make_htlc_item(self, i: UpdateAddHtlc, direction: Direction) -> HTLCItem:
it = HTLCItem(_('Sent HTLC with ID {}' if Direction.SENT == direction else 'Received HTLC with ID {}').format(i.htlc_id))
it.appendRow([HTLCItem(_('Amount')),HTLCItem(self.format(i.amount_msat))])
it.appendRow([HTLCItem(_('CLTV expiry')),HTLCItem(str(i.cltv_expiry))])
it.appendRow([HTLCItem(_('Payment hash')),HTLCItem(bh2u(i.payment_hash))])
return it
def build_psbt(tx: Transaction, wallet: Abstract_Wallet):
# Render a PSBT file, for possible upload to Coldcard.
#
# TODO this should be part of Wallet object, or maybe Transaction?
if getattr(tx, 'raw_psbt', False):
_logger.info('PSBT cache hit')
return tx.raw_psbt
inputs = tx.inputs()
if 'prev_tx' not in inputs[0]:
# fetch info about inputs, if needed?
# - needed during export PSBT flow, not normal online signing
wallet.add_hw_info(tx)
# wallet.add_hw_info installs this attr
assert tx.output_info is not None, 'need data about outputs'
# Build a map of all pubkeys needed as derivation from master XFP, in PSBT binary format
# 1) binary version of the common subpath for all keys
# m/ => fingerprint LE32
# a/b/c => ints
#
# 2) all used keys in transaction:
# - for all inputs and outputs (when its change back)
# - for all keystores, if multisig
#
subkeys = {}
for ks in wallet.get_keystores():
# XFP + fixed prefix for this keystore
ks_prefix = packed_xfp_path_for_keystore(ks)
# all pubkeys needed for input signing
for xpubkey, derivation in ks.get_tx_derivations(tx).items():
pubkey = xpubkey_to_pubkey(xpubkey)
# assuming depth two, non-harded: change + index
aa, bb = derivation
assert 0 <= aa < 0x80000000 and 0 <= bb < 0x80000000
subkeys[bfh(pubkey)] = ks_prefix + pack('<II', aa, bb)
# all keys related to change outputs
for o in tx.outputs():
if o.address in tx.output_info:
# this address "is_mine" but might not be change (if I send funds to myself)
output_info = tx.output_info.get(o.address)
if not output_info.is_change:
continue
chg_path = output_info.address_index
assert chg_path[0] == 1 and len(chg_path) == 2, f"unexpected change path: {chg_path}"
pubkey = ks.derive_pubkey(True, chg_path[1])
subkeys[bfh(pubkey)] = ks_prefix + pack('<II', *chg_path)
for txin in inputs:
assert txin['type'] != 'coinbase', _("Coinbase not supported")
if txin['type'] in ['p2sh', 'p2wsh-p2sh', 'p2wsh']:
assert type(wallet) is Multisig_Wallet
# Construct PSBT from start to finish.
out_fd = io.BytesIO()
out_fd.write(b'psbt\xff')
def write_kv(ktype, val, key=b''):
# serialize helper: write w/ size and key byte
out_fd.write(my_var_int(1 + len(key)))
out_fd.write(bytes([ktype]) + key)
if isinstance(val, str):
val = bfh(val)
out_fd.write(my_var_int(len(val)))
out_fd.write(val)
# global section: just the unsigned txn
class CustomTXSerialization(Transaction):
@classmethod
def input_script(cls, txin, estimate_size=False):
return ''
unsigned = bfh(CustomTXSerialization(tx.serialize()).serialize_to_network(witness=False))
write_kv(PSBT_GLOBAL_UNSIGNED_TX, unsigned)
if type(wallet) is Multisig_Wallet:
# always put the xpubs into the PSBT, useful at least for checking
for xp, ks in zip(wallet.get_master_public_keys(), wallet.get_keystores()):
ks_prefix = packed_xfp_path_for_keystore(ks)
write_kv(PSBT_GLOBAL_XPUB, ks_prefix, DecodeBase58Check(xp))
# end globals section
out_fd.write(b'\x00')
# inputs section
for txin in inputs:
if Transaction.is_segwit_input(txin):
utxo = txin['prev_tx'].outputs()[txin['prevout_n']]
spendable = txin['prev_tx'].serialize_output(utxo)
write_kv(PSBT_IN_WITNESS_UTXO, spendable)
else:
write_kv(PSBT_IN_NON_WITNESS_UTXO, str(txin['prev_tx']))
pubkeys, x_pubkeys = tx.get_sorted_pubkeys(txin)
pubkeys = [bfh(k) for k in pubkeys]
if type(wallet) is Multisig_Wallet:
# always need a redeem script for multisig
scr = Transaction.get_preimage_script(txin)
if Transaction.is_segwit_input(txin):
# needed for both p2wsh-p2sh and p2wsh
write_kv(PSBT_IN_WITNESS_SCRIPT, bfh(scr))
else:
write_kv(PSBT_IN_REDEEM_SCRIPT, bfh(scr))
sigs = txin.get('signatures')
for pk_pos, (pubkey, x_pubkey) in enumerate(zip(pubkeys, x_pubkeys)):
if pubkey in subkeys:
# faster? case ... calculated above
write_kv(PSBT_IN_BIP32_DERIVATION, subkeys[pubkey], pubkey)
else:
# when an input is partly signed, tx.get_tx_derivations()
# doesn't include that keystore's value and yet we need it
# because we need to show a correct keypath...
assert x_pubkey[0:2] == 'ff', x_pubkey
for ks in wallet.get_keystores():
d = ks.get_pubkey_derivation(x_pubkey)
if d is not None:
ks_path = packed_xfp_path_for_keystore(ks, d)
write_kv(PSBT_IN_BIP32_DERIVATION, ks_path, pubkey)
break
else:
raise AssertionError("no keystore for: %s" % x_pubkey)
if txin['type'] == 'p2wpkh-p2sh':
assert len(pubkeys) == 1, 'can be only one redeem script per input'
pa = hash_160(pubkey)
assert len(pa) == 20
write_kv(PSBT_IN_REDEEM_SCRIPT, b'\x00\x14'+pa)
# optional? insert (partial) signatures that we already have
if sigs and sigs[pk_pos]:
write_kv(PSBT_IN_PARTIAL_SIG, bfh(sigs[pk_pos]), pubkey)
out_fd.write(b'\x00')
# outputs section
for o in tx.outputs():
# can be empty, but must be present, and helpful to show change inputs
# wallet.add_hw_info() adds some data about change outputs into tx.output_info
if o.address in tx.output_info:
# this address "is_mine" but might not be change (if I send funds to myself)
output_info = tx.output_info.get(o.address)
if output_info.is_change:
pubkeys = [bfh(i) for i in wallet.get_public_keys(o.address)]
# Add redeem/witness script?
if type(wallet) is Multisig_Wallet:
# always need a redeem script for multisig cases
scr = bfh(multisig_script([bh2u(i) for i in sorted(pubkeys)], wallet.m))
if output_info.script_type == 'p2wsh-p2sh':
write_kv(PSBT_OUT_WITNESS_SCRIPT, scr)
write_kv(PSBT_OUT_REDEEM_SCRIPT, b'\x00\x20' + sha256(scr))
elif output_info.script_type == 'p2wsh':
write_kv(PSBT_OUT_WITNESS_SCRIPT, scr)
elif output_info.script_type == 'p2sh':
write_kv(PSBT_OUT_REDEEM_SCRIPT, scr)
else:
raise ValueError(output_info.script_type)
elif output_info.script_type == 'p2wpkh-p2sh':
# need a redeem script when P2SH is used to wrap p2wpkh
assert len(pubkeys) == 1
pa = hash_160(pubkeys[0])
write_kv(PSBT_OUT_REDEEM_SCRIPT, b'\x00\x14' + pa)
# Document change output's bip32 derivation(s)
for pubkey in pubkeys:
sk = subkeys[pubkey]
write_kv(PSBT_OUT_BIP32_DERIVATION, sk, pubkey)
out_fd.write(b'\x00')
# capture for later use
tx.raw_psbt = out_fd.getvalue()
return tx.raw_psbt