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340 lines
14 KiB
340 lines
14 KiB
import base64 |
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import re |
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import threading |
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from binascii import unhexlify |
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from functools import partial |
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from electrum.account import BIP32_Account |
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from electrum.bitcoin import (bc_address_to_hash_160, xpub_from_pubkey, |
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public_key_to_bc_address, EncodeBase58Check, |
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TYPE_ADDRESS) |
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from electrum.i18n import _ |
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from electrum.plugins import BasePlugin, hook |
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from electrum.transaction import (deserialize, is_extended_pubkey, |
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Transaction, x_to_xpub) |
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from ..hw_wallet import BIP44_HW_Wallet, HW_PluginBase |
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# TREZOR initialization methods |
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TIM_NEW, TIM_RECOVER, TIM_MNEMONIC, TIM_PRIVKEY = range(0, 4) |
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class TrezorCompatibleWallet(BIP44_HW_Wallet): |
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def get_public_key(self, bip32_path): |
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client = self.get_client() |
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address_n = client.expand_path(bip32_path) |
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creating = self.next_account_number() == 0 |
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node = client.get_public_node(address_n, creating).node |
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xpub = ("0488B21E".decode('hex') + chr(node.depth) |
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+ self.i4b(node.fingerprint) + self.i4b(node.child_num) |
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+ node.chain_code + node.public_key) |
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return EncodeBase58Check(xpub) |
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def decrypt_message(self, pubkey, message, password): |
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raise RuntimeError(_('Electrum and %s encryption and decryption are currently incompatible') % self.device) |
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address = public_key_to_bc_address(pubkey.decode('hex')) |
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client = self.get_client() |
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address_path = self.address_id(address) |
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address_n = client.expand_path(address_path) |
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payload = base64.b64decode(message) |
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nonce, message, msg_hmac = payload[:33], payload[33:-8], payload[-8:] |
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result = client.decrypt_message(address_n, nonce, message, msg_hmac) |
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return result.message |
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def sign_message(self, address, message, password): |
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client = self.get_client() |
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address_path = self.address_id(address) |
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address_n = client.expand_path(address_path) |
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msg_sig = client.sign_message('Bitcoin', address_n, message) |
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return msg_sig.signature |
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def get_input_tx(self, tx_hash): |
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# First look up an input transaction in the wallet where it |
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# will likely be. If co-signing a transaction it may not have |
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# all the input txs, in which case we ask the network. |
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tx = self.transactions.get(tx_hash) |
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if not tx: |
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request = ('blockchain.transaction.get', [tx_hash]) |
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# FIXME: what if offline? |
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tx = Transaction(self.network.synchronous_get(request)) |
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return tx |
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def sign_transaction(self, tx, password): |
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if tx.is_complete(): |
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return |
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# previous transactions used as inputs |
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prev_tx = {} |
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# path of the xpubs that are involved |
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xpub_path = {} |
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for txin in tx.inputs(): |
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tx_hash = txin['prevout_hash'] |
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prev_tx[tx_hash] = self.get_input_tx(tx_hash) |
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for x_pubkey in txin['x_pubkeys']: |
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if not is_extended_pubkey(x_pubkey): |
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continue |
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xpub = x_to_xpub(x_pubkey) |
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for k, v in self.master_public_keys.items(): |
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if v == xpub: |
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acc_id = re.match("x/(\d+)'", k).group(1) |
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xpub_path[xpub] = self.account_derivation(acc_id) |
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self.plugin.sign_transaction(self, tx, prev_tx, xpub_path) |
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class TrezorCompatiblePlugin(HW_PluginBase): |
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# Derived classes provide: |
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# |
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# class-static variables: client_class, firmware_URL, handler_class, |
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# libraries_available, libraries_URL, minimum_firmware, |
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# wallet_class, ckd_public, types, HidTransport |
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MAX_LABEL_LEN = 32 |
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def __init__(self, parent, config, name): |
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HW_PluginBase.__init__(self, parent, config, name) |
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self.main_thread = threading.current_thread() |
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# FIXME: move to base class when Ledger is fixed |
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if self.libraries_available: |
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self.device_manager().register_devices(self.DEVICE_IDS) |
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def create_client(self, device, handler): |
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if device.interface_number == 1: |
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pair = [None, device.path] |
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else: |
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pair = [device.path, None] |
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try: |
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transport = self.HidTransport(pair) |
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except BaseException as e: |
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# We were probably just disconnected; never mind |
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self.print_error("cannot connect at", device.path, str(e)) |
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return None |
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self.print_error("connected to device at", device.path) |
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client = self.client_class(transport, handler, self) |
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# Try a ping for device sanity |
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try: |
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client.ping('t') |
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except BaseException as e: |
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self.print_error("ping failed", str(e)) |
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return None |
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if not client.atleast_version(*self.minimum_firmware): |
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msg = (_('Outdated %s firmware for device labelled %s. Please ' |
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'download the updated firmware from %s') % |
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(self.device, client.label(), self.firmware_URL)) |
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handler.show_error(msg) |
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return None |
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return client |
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def get_client(self, wallet, force_pair=True): |
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# All client interaction should not be in the main GUI thread |
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assert self.main_thread != threading.current_thread() |
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devmgr = self.device_manager() |
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client = devmgr.client_for_wallet(self, wallet, force_pair) |
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if client: |
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client.used() |
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return client |
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def initialize_device(self, wallet): |
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# Initialization method |
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msg = _("Choose how you want to initialize your %s.\n\n" |
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"The first two methods are secure as no secret information " |
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"is entered into your computer.\n\n" |
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"For the last two methods you input secrets on your keyboard " |
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"and upload them to your %s, and so you should " |
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"only do those on a computer you know to be trustworthy " |
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"and free of malware." |
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) % (self.device, self.device) |
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methods = [ |
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# Must be short as QT doesn't word-wrap radio button text |
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_("Let the device generate a completely new seed randomly"), |
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_("Recover from a seed you have previously written down"), |
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_("Upload a BIP39 mnemonic to generate the seed"), |
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_("Upload a master private key") |
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] |
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method = wallet.handler.query_choice(msg, methods) |
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(item, label, pin_protection, passphrase_protection) \ |
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= wallet.handler.request_trezor_init_settings(method, self.device) |
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if method == TIM_RECOVER and self.device == 'TREZOR': |
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# Warn user about firmware lameness |
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wallet.handler.show_error(_( |
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"You will be asked to enter 24 words regardless of your " |
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"seed's actual length. If you enter a word incorrectly or " |
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"misspell it, you cannot change it or go back - you will need " |
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"to start again from the beginning.\n\nSo please enter " |
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"the words carefully!")) |
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language = 'english' |
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def initialize_method(): |
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client = self.get_client(wallet) |
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if method == TIM_NEW: |
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strength = 64 * (item + 2) # 128, 192 or 256 |
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client.reset_device(True, strength, passphrase_protection, |
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pin_protection, label, language) |
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elif method == TIM_RECOVER: |
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word_count = 6 * (item + 2) # 12, 18 or 24 |
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client.step = 0 |
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client.recovery_device(word_count, passphrase_protection, |
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pin_protection, label, language) |
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elif method == TIM_MNEMONIC: |
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pin = pin_protection # It's the pin, not a boolean |
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client.load_device_by_mnemonic(str(item), pin, |
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passphrase_protection, |
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label, language) |
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else: |
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pin = pin_protection # It's the pin, not a boolean |
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client.load_device_by_xprv(item, pin, passphrase_protection, |
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label, language) |
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# After successful initialization create accounts |
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wallet.create_hd_account(None) |
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return initialize_method |
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def setup_device(self, wallet, on_done, on_error): |
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'''Called when creating a new wallet. Select the device to use. If |
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the device is uninitialized, go through the intialization |
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process. Then create the wallet accounts.''' |
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devmgr = self.device_manager() |
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device_info = devmgr.select_device(wallet, self) |
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devmgr.pair_wallet(wallet, device_info.device.id_) |
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if device_info.initialized: |
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task = partial(wallet.create_hd_account, None) |
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else: |
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task = self.initialize_device(wallet) |
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wallet.thread.add(task, on_done=on_done, on_error=on_error) |
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def sign_transaction(self, wallet, tx, prev_tx, xpub_path): |
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self.prev_tx = prev_tx |
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self.xpub_path = xpub_path |
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client = self.get_client(wallet) |
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inputs = self.tx_inputs(tx, True) |
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outputs = self.tx_outputs(wallet, tx) |
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signed_tx = client.sign_tx('Bitcoin', inputs, outputs)[1] |
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raw = signed_tx.encode('hex') |
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tx.update_signatures(raw) |
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def show_address(self, wallet, address): |
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client = self.get_client(wallet) |
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if not client.atleast_version(1, 3): |
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wallet.handler.show_error(_("Your device firmware is too old")) |
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return |
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address_path = wallet.address_id(address) |
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address_n = client.expand_path(address_path) |
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client.get_address('Bitcoin', address_n, True) |
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def tx_inputs(self, tx, for_sig=False): |
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inputs = [] |
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for txin in tx.inputs(): |
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txinputtype = self.types.TxInputType() |
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if txin.get('is_coinbase'): |
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prev_hash = "\0"*32 |
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prev_index = 0xffffffff # signed int -1 |
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else: |
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if for_sig: |
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x_pubkeys = txin['x_pubkeys'] |
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if len(x_pubkeys) == 1: |
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x_pubkey = x_pubkeys[0] |
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xpub, s = BIP32_Account.parse_xpubkey(x_pubkey) |
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xpub_n = self.client_class.expand_path(self.xpub_path[xpub]) |
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txinputtype.address_n.extend(xpub_n + s) |
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else: |
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def f(x_pubkey): |
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if is_extended_pubkey(x_pubkey): |
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xpub, s = BIP32_Account.parse_xpubkey(x_pubkey) |
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else: |
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xpub = xpub_from_pubkey(x_pubkey.decode('hex')) |
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s = [] |
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node = self.ckd_public.deserialize(xpub) |
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return self.types.HDNodePathType(node=node, address_n=s) |
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pubkeys = map(f, x_pubkeys) |
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multisig = self.types.MultisigRedeemScriptType( |
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pubkeys=pubkeys, |
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signatures=map(lambda x: x.decode('hex') if x else '', txin.get('signatures')), |
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m=txin.get('num_sig'), |
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) |
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txinputtype = self.types.TxInputType( |
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script_type=self.types.SPENDMULTISIG, |
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multisig=multisig |
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) |
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# find which key is mine |
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for x_pubkey in x_pubkeys: |
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if is_extended_pubkey(x_pubkey): |
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xpub, s = BIP32_Account.parse_xpubkey(x_pubkey) |
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if xpub in self.xpub_path: |
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xpub_n = self.client_class.expand_path(self.xpub_path[xpub]) |
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txinputtype.address_n.extend(xpub_n + s) |
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break |
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prev_hash = unhexlify(txin['prevout_hash']) |
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prev_index = txin['prevout_n'] |
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txinputtype.prev_hash = prev_hash |
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txinputtype.prev_index = prev_index |
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if 'scriptSig' in txin: |
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script_sig = txin['scriptSig'].decode('hex') |
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txinputtype.script_sig = script_sig |
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if 'sequence' in txin: |
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sequence = txin['sequence'] |
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txinputtype.sequence = sequence |
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inputs.append(txinputtype) |
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return inputs |
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def tx_outputs(self, wallet, tx): |
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outputs = [] |
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for type, address, amount in tx.outputs(): |
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assert type == TYPE_ADDRESS |
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txoutputtype = self.types.TxOutputType() |
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if wallet.is_change(address): |
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address_path = wallet.address_id(address) |
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address_n = self.client_class.expand_path(address_path) |
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txoutputtype.address_n.extend(address_n) |
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else: |
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txoutputtype.address = address |
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txoutputtype.amount = amount |
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addrtype, hash_160 = bc_address_to_hash_160(address) |
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if addrtype == 0: |
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txoutputtype.script_type = self.types.PAYTOADDRESS |
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elif addrtype == 5: |
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txoutputtype.script_type = self.types.PAYTOSCRIPTHASH |
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else: |
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raise BaseException('addrtype') |
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outputs.append(txoutputtype) |
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return outputs |
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def electrum_tx_to_txtype(self, tx): |
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t = self.types.TransactionType() |
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d = deserialize(tx.raw) |
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t.version = d['version'] |
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t.lock_time = d['lockTime'] |
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inputs = self.tx_inputs(tx) |
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t.inputs.extend(inputs) |
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for vout in d['outputs']: |
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o = t.bin_outputs.add() |
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o.amount = vout['value'] |
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o.script_pubkey = vout['scriptPubKey'].decode('hex') |
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return t |
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# This function is called from the trezor libraries (via tx_api) |
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def get_tx(self, tx_hash): |
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tx = self.prev_tx[tx_hash] |
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return self.electrum_tx_to_txtype(tx) |
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@staticmethod |
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def is_valid_seed(seed): |
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return True
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