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357 lines
13 KiB
357 lines
13 KiB
import re
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from binascii import unhexlify
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from struct import pack
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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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EncodeBase58Check)
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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 electrum.wallet import BIP32_HD_Wallet, BIP44_Wallet
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class TrezorCompatibleWallet(BIP44_Wallet):
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# Extend BIP44 Wallet as required by hardware implementation.
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# Derived classes must set:
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# - device
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# - wallet_type
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restore_wallet_class = BIP44_Wallet
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def __init__(self, storage):
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BIP44_Wallet.__init__(self, storage)
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self.checked_device = False
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self.proper_device = False
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def give_error(self, message):
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self.print_error(message)
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raise Exception(message)
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def get_action(self):
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if not self.accounts:
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return 'create_accounts'
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def can_export(self):
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return False
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def is_watching_only(self):
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return self.checked_device and not self.proper_device
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def can_change_password(self):
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return False
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def get_client(self):
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return self.plugin.get_client()
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def derive_xkeys(self, root, derivation, password):
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if self.master_public_keys.get(root):
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return BIP44_wallet.derive_xkeys(self, root, derivation, password)
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# Happens when creating a wallet
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derivation = derivation.replace(self.root_name, self.prefix() + "/")
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xpub = self.get_public_key(derivation)
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return xpub, None
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def get_public_key(self, bip32_path):
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address_n = self.get_client().expand_path(bip32_path)
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node = self.get_client().get_public_node(address_n).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 i4b(self, x):
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return pack('>I', x)
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def decrypt_message(self, pubkey, message, password):
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raise RuntimeError(_('Decrypt method is not implemented'))
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def sign_message(self, address, message, password):
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if self.has_seed():
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return BIP32_HD_Wallet.sign_message(self, address, message, password)
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self.check_proper_device()
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try:
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address_path = self.address_id(address)
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address_n = self.get_client().expand_path(address_path)
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except Exception as e:
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self.give_error(e)
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try:
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msg_sig = self.get_client().sign_message('Bitcoin', address_n,
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message)
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except Exception as e:
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self.give_error(e)
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finally:
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self.plugin.handler.stop()
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return msg_sig.signature
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def sign_transaction(self, tx, password):
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if tx.is_complete() or self.is_watching_only():
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return
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if self.has_seed():
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return BIP32_HD_Wallet.sign_transaction(self, tx, password)
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self.check_proper_device()
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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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ptx = self.transactions.get(tx_hash)
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if ptx is None:
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ptx = self.network.synchronous_get(('blockchain.transaction.get', [tx_hash]))
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ptx = Transaction(ptx)
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prev_tx[tx_hash] = ptx
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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(tx, prev_tx, xpub_path)
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def is_proper_device(self):
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self.get_client().ping('t')
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if not self.checked_device:
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address = self.addresses(False)[0]
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address_id = self.address_id(address)
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n = self.get_client().expand_path(address_id)
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device_address = self.get_client().get_address('Bitcoin', n)
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self.checked_device = True
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self.proper_device = (device_address == address)
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return self.proper_device
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def check_proper_device(self):
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if not self.is_proper_device():
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self.give_error(_('Wrong device or password'))
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def sanity_check(self):
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try:
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self.get_client().ping('t')
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except BaseException as e:
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return _("%s device not detected. Continuing in watching-only "
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"mode.") % self.device + "\n\n" + str(e)
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if self.addresses() and not self.is_proper_device():
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return _("This wallet does not match your %s device") % self.device
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return None
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class TrezorCompatiblePlugin(BasePlugin):
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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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def __init__(self, parent, config, name):
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BasePlugin.__init__(self, parent, config, name)
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self.device = self.wallet_class.device
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self.wallet = None
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self.handler = None
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self.client = None
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def constructor(self, s):
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return self.wallet_class(s)
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def give_error(self, message):
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self.print_error(message)
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raise Exception(message)
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def is_available(self):
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if not self.libraries_available:
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return False
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if not self.wallet:
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return False
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wallet_type = self.wallet.storage.get('wallet_type')
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return wallet_type == self.wallet_class.wallet_type
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def set_enabled(self, enabled):
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self.wallet.storage.put('use_' + self.name, enabled)
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def is_enabled(self):
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if not self.is_available():
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return False
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if self.wallet.has_seed():
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return False
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return True
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def create_client(self):
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if not self.libraries_available:
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self.give_error(_('please install the %s libraries from %s')
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% (self.device, self.libraries_URL))
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devices = self.HidTransport.enumerate()
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if not devices:
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self.give_error(_('Could not connect to your %s. Please '
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'verify the cable is connected and that no '
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'other app is using it.' % self.device))
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transport = self.HidTransport(devices[0])
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client = self.client_class(transport, self)
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if not client.atleast_version(*self.minimum_firmware):
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self.give_error(_('Outdated %s firmware. Please update the '
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'firmware from %s')
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% (self.device, self.firmware_URL))
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return client
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def get_client(self):
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if not self.client or self.client.bad:
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self.client = self.create_client()
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return self.client
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def atleast_version(self, major, minor=0, patch=0):
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return self.get_client().atleast_version(major, minor, patch)
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@hook
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def close_wallet(self):
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self.print_error("clear session")
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if self.client:
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self.client.clear_session()
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self.client.transport.close()
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self.client = None
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self.wallet = None
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def sign_transaction(self, 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()
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inputs = self.tx_inputs(tx, True)
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outputs = self.tx_outputs(tx)
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try:
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signed_tx = client.sign_tx('Bitcoin', inputs, outputs)[1]
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except Exception as e:
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self.give_error(e)
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finally:
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self.handler.stop()
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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, address):
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client = self.get_client()
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self.wallet.check_proper_device()
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try:
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address_path = self.wallet.address_id(address)
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address_n = client.expand_path(address_path)
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except Exception as e:
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self.give_error(e)
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try:
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client.get_address('Bitcoin', address_n, True)
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except Exception as e:
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self.give_error(e)
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finally:
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self.handler.stop()
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def tx_inputs(self, tx, for_sig=False):
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client = self.get_client()
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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 = client.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 = 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 = client.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, tx):
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client = self.get_client()
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outputs = []
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for type, address, amount in tx.outputs:
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assert type == 'address'
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txoutputtype = self.types.TxOutputType()
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if self.wallet.is_change(address):
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address_path = self.wallet.address_id(address)
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address_n = client.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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tx.deserialize()
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return self.electrum_tx_to_txtype(tx)
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