URI: 
       tCombine keepkey and trezor wallet code - electrum - Electrum Bitcoin wallet
  HTML git clone https://git.parazyd.org/electrum
   DIR Log
   DIR Files
   DIR Refs
   DIR Submodules
       ---
   DIR commit 3a1bb5b61a5126ad47ff01a609b0e24db800c1f5
   DIR parent 96c7f9e7cbc0176ce14017491cbfb1d58d8386f2
  HTML Author: Neil Booth <kyuupichan@gmail.com>
       Date:   Sat, 26 Dec 2015 16:25:10 +0900
       
       Combine keepkey and trezor wallet code
       
       Essentially identical so silly to have two copies.
       Also fix a double-dialog during sign bug that caused one to not
       disappear (on MacOSX at least).
       
       Diffstat:
         M lib/wallet.py                       |     174 ++++++++++++++++++++++++++++++-
         M plugins/keepkey/keepkey.py          |     183 ++-----------------------------
         M plugins/keepkey/qt.py               |      18 ++++++++----------
         M plugins/trezor/qt.py                |      20 +++++++++-----------
         M plugins/trezor/trezor.py            |     175 ++-----------------------------
       
       5 files changed, 205 insertions(+), 365 deletions(-)
       ---
   DIR diff --git a/lib/wallet.py b/lib/wallet.py
       t@@ -25,6 +25,7 @@ import time
        import json
        import copy
        from functools import partial
       +from struct import pack
        from i18n import _
        
        from util import NotEnoughFunds, PrintError, profiler
       t@@ -33,7 +34,7 @@ from bitcoin import *
        from account import *
        from version import *
        
       -from transaction import Transaction
       +from transaction import Transaction, is_extended_pubkey, x_to_xpub
        from plugins import run_hook
        import bitcoin
        from coinchooser import COIN_CHOOSERS
       t@@ -1705,6 +1706,177 @@ class BIP32_HD_Wallet(BIP32_Wallet):
            def accounts_all_used(self):
                return all(self.account_is_used(acc_id) for acc_id in self.accounts)
        
       +class BIP32_Hardware_Wallet(BIP32_HD_Wallet):
       +    # Derived classes must set:
       +    #   - device
       +    #   - wallet_type
       +    #   - root_derivation
       +    #   - plugin implementing handler, sign_transaction() and get_client()
       +
       +    def __init__(self, storage):
       +        BIP32_HD_Wallet.__init__(self, storage)
       +        self.mpk = None
       +        self.checked_device = False
       +        self.proper_device = False
       +
       +    def give_error(self, message):
       +        self.print_error(message)
       +        raise Exception(message)
       +
       +    def get_action(self):
       +        if not self.accounts:
       +            return 'create_accounts'
       +
       +    def can_import(self):
       +        return False
       +
       +    def can_sign_xpubkey(self, x_pubkey):
       +        xpub, sequence = BIP32_Account.parse_xpubkey(x_pubkey)
       +        return xpub in self.master_public_keys.values()
       +
       +    def can_export(self):
       +        return False
       +
       +    def is_watching_only(self):
       +        return self.checked_device and not self.proper_device
       +
       +    def can_create_accounts(self):
       +        return True
       +
       +    def can_change_password(self):
       +        return False
       +
       +    def get_client(self):
       +        return self.plugin.get_client()
       +
       +    def prefix(self):
       +        return "/".join(self.root_derivation.split("/")[1:])
       +
       +    def account_derivation(self, account_id):
       +        return self.prefix() + "/" + account_id + "'"
       +
       +    def address_id(self, address):
       +        acc_id, (change, address_index) = self.get_address_index(address)
       +        account_derivation = self.account_derivation(acc_id)
       +        return "%s/%d/%d" % (account_derivation, change, address_index)
       +
       +    def mnemonic_to_seed(self, mnemonic, passphrase):
       +        # trezor uses bip39
       +        import pbkdf2, hashlib, hmac
       +        PBKDF2_ROUNDS = 2048
       +        mnemonic = unicodedata.normalize('NFKD', ' '.join(mnemonic.split()))
       +        passphrase = unicodedata.normalize('NFKD', passphrase)
       +        return pbkdf2.PBKDF2(mnemonic, 'mnemonic' + passphrase,
       +                             iterations = PBKDF2_ROUNDS, macmodule = hmac,
       +                             digestmodule = hashlib.sha512).read(64)
       +
       +    def derive_xkeys(self, root, derivation, password):
       +        x = self.master_private_keys.get(root)
       +        if x:
       +            root_xprv = pw_decode(x, password)
       +            xprv, xpub = bip32_private_derivation(root_xprv, root, derivation)
       +            return xpub, xprv
       +        else:
       +            derivation = derivation.replace(self.root_name, self.prefix()+"/")
       +            xpub = self.get_public_key(derivation)
       +            return xpub, None
       +
       +    def get_public_key(self, bip32_path):
       +        address_n = self.get_client().expand_path(bip32_path)
       +        node = self.get_client().get_public_node(address_n).node
       +        xpub = ("0488B21E".decode('hex') + chr(node.depth)
       +                + self.i4b(node.fingerprint) + self.i4b(node.child_num)
       +                + node.chain_code + node.public_key)
       +        return EncodeBase58Check(xpub)
       +
       +    def get_master_public_key(self):
       +        if not self.mpk:
       +            self.mpk = self.get_public_key(self.prefix())
       +        return self.mpk
       +
       +    def i4b(self, x):
       +        return pack('>I', x)
       +
       +    def decrypt_message(self, pubkey, message, password):
       +        raise RuntimeError(_('Decrypt method is not implemented'))
       +
       +    def sign_message(self, address, message, password):
       +        if self.has_seed():
       +            return BIP32_HD_Wallet.sign_message(self, address, message, password)
       +        self.check_proper_device()
       +        try:
       +            address_path = self.address_id(address)
       +            address_n = self.get_client().expand_path(address_path)
       +        except Exception as e:
       +            self.give_error(e)
       +        try:
       +            msg_sig = self.get_client().sign_message('Bitcoin', address_n,
       +                                                     message)
       +        except Exception as e:
       +            self.give_error(e)
       +        finally:
       +            self.plugin.handler.stop()
       +        return msg_sig.signature
       +
       +    def sign_transaction(self, tx, password):
       +        if tx.is_complete() or self.is_watching_only():
       +            return
       +        if self.has_seed():
       +            return BIP32_HD_Wallet.sign_transaction(self, tx, password)
       +        self.check_proper_device()
       +        # previous transactions used as inputs
       +        prev_tx = {}
       +        # path of the xpubs that are involved
       +        xpub_path = {}
       +        for txin in tx.inputs:
       +            tx_hash = txin['prevout_hash']
       +
       +            ptx = self.transactions.get(tx_hash)
       +            if ptx is None:
       +                ptx = self.network.synchronous_get(('blockchain.transaction.get', [tx_hash]))
       +                ptx = Transaction(ptx)
       +            prev_tx[tx_hash] = ptx
       +
       +            for x_pubkey in txin['x_pubkeys']:
       +                if not is_extended_pubkey(x_pubkey):
       +                    continue
       +                xpub = x_to_xpub(x_pubkey)
       +                for k, v in self.master_public_keys.items():
       +                    if v == xpub:
       +                        acc_id = re.match("x/(\d+)'", k).group(1)
       +                        xpub_path[xpub] = self.account_derivation(acc_id)
       +
       +        self.plugin.sign_transaction(tx, prev_tx, xpub_path)
       +
       +    def is_proper_device(self):
       +        self.get_client().ping('t')
       +
       +        if not self.checked_device:
       +            address = self.addresses(False)[0]
       +            address_id = self.address_id(address)
       +            n = self.get_client().expand_path(address_id)
       +            device_address = self.get_client().get_address('Bitcoin', n)
       +            self.checked_device = True
       +            self.proper_device = (device_address == address)
       +
       +        return self.proper_device
       +
       +    def check_proper_device(self):
       +        if not self.is_proper_device():
       +            self.give_error(_('Wrong device or password'))
       +
       +    def sanity_check(self):
       +        try:
       +            self.get_client().ping('t')
       +        except BaseException as e:
       +            return _("%s device not detected.  Continuing in watching-only "
       +                     "mode.") % self.device + "\n\n" + str(e)
       +
       +        if self.addresses() and not self.is_proper_device():
       +            return _("This wallet does not match your %s device") % self.device
       +
       +        return None
       +
        
        class NewWallet(BIP32_Wallet, Mnemonic):
            # Standard wallet
   DIR diff --git a/plugins/keepkey/keepkey.py b/plugins/keepkey/keepkey.py
       t@@ -1,25 +1,16 @@
        from binascii import unhexlify
       -from struct import pack
        from sys import stderr
       -from time import sleep
       -import unicodedata
       -import threading
       -import re
       -from functools import partial
       -
        
        import electrum
        from electrum import bitcoin
        
        from electrum.account import BIP32_Account
       -from electrum.bitcoin import EncodeBase58Check, public_key_to_bc_address, bc_address_to_hash_160, xpub_from_pubkey
       +from electrum.bitcoin import bc_address_to_hash_160, xpub_from_pubkey
        from electrum.i18n import _
       -from electrum.plugins import BasePlugin, hook, always_hook, run_hook
       -from electrum.transaction import Transaction, deserialize, is_extended_pubkey, x_to_xpub
       -from electrum.wallet import BIP32_HD_Wallet
       -from electrum.util import print_error, print_msg
       -from electrum.wallet import pw_decode, bip32_private_derivation, bip32_root
       -
       +from electrum.plugins import BasePlugin, hook
       +from electrum.transaction import deserialize, is_extended_pubkey
       +from electrum.wallet import BIP32_Hardware_Wallet
       +from electrum.util import print_error
        
        try:
            from keepkeylib.client import types
       t@@ -41,167 +32,10 @@ def give_error(message):
            raise Exception(message)
        
        
       -
       -
       -class KeepKeyWallet(BIP32_HD_Wallet):
       +class KeepKeyWallet(BIP32_Hardware_Wallet):
            wallet_type = 'keepkey'
            root_derivation = "m/44'/0'"
       -
       -    def __init__(self, storage):
       -        BIP32_HD_Wallet.__init__(self, storage)
       -        self.mpk = None
       -        self.device_checked = False
       -        self.proper_device = False
       -        self.force_watching_only = False
       -
       -    def get_action(self):
       -        if not self.accounts:
       -            return 'create_accounts'
       -
       -    def can_import(self):
       -        return False
       -
       -    def can_sign_xpubkey(self, x_pubkey):
       -        xpub, sequence = BIP32_Account.parse_xpubkey(x_pubkey)
       -        return xpub in self.master_public_keys.values()
       -
       -    def can_export(self):
       -        return False
       -
       -    def can_create_accounts(self):
       -        return True
       -
       -    def can_change_password(self):
       -        return False
       -
       -    def is_watching_only(self):
       -        return self.force_watching_only
       -
       -    def get_client(self):
       -        return self.plugin.get_client()
       -
       -    def address_id(self, address):
       -        account_id, (change, address_index) = self.get_address_index(address)
       -        return "44'/0'/%s'/%d/%d" % (account_id, change, address_index)
       -
       -    def mnemonic_to_seed(self, mnemonic, passphrase):
       -        # keepkey uses bip39
       -        import pbkdf2, hashlib, hmac
       -        PBKDF2_ROUNDS = 2048
       -        mnemonic = unicodedata.normalize('NFKD', ' '.join(mnemonic.split()))
       -        passphrase = unicodedata.normalize('NFKD', passphrase)
       -        return pbkdf2.PBKDF2(mnemonic, 'mnemonic' + passphrase, iterations = PBKDF2_ROUNDS, macmodule = hmac, digestmodule = hashlib.sha512).read(64)
       -
       -    def derive_xkeys(self, root, derivation, password):
       -        x = self.master_private_keys.get(root)
       -        if x:
       -            root_xprv = pw_decode(x, password)
       -            xprv, xpub = bip32_private_derivation(root_xprv, root, derivation)
       -            return xpub, xprv
       -        else:
       -            derivation = derivation.replace(self.root_name,"44'/0'/")
       -            xpub = self.get_public_key(derivation)
       -            return xpub, None
       -
       -    def get_public_key(self, bip32_path):
       -        address_n = self.plugin.get_client().expand_path(bip32_path)
       -        node = self.plugin.get_client().get_public_node(address_n).node
       -        xpub = "0488B21E".decode('hex') + chr(node.depth) + self.i4b(node.fingerprint) + self.i4b(node.child_num) + node.chain_code + node.public_key
       -        return EncodeBase58Check(xpub)
       -
       -    def get_master_public_key(self):
       -        if not self.mpk:
       -            self.mpk = self.get_public_key("44'/0'")
       -        return self.mpk
       -
       -    def i4b(self, x):
       -        return pack('>I', x)
       -
       -    def add_keypairs(self, tx, keypairs, password):
       -        #do nothing - no priv keys available
       -        pass
       -
       -    def decrypt_message(self, pubkey, message, password):
       -        raise BaseException( _('Decrypt method is not implemented in KeepKey') )
       -        #address = public_key_to_bc_address(pubkey.decode('hex'))
       -        #address_path = self.address_id(address)
       -        #address_n = self.get_client().expand_path(address_path)
       -        #try:
       -        #    decrypted_msg = self.get_client().decrypt_message(address_n, b64decode(message))
       -        #except Exception, e:
       -        #    give_error(e)
       -        #finally:
       -        #    twd.stop()
       -        #return str(decrypted_msg)
       -
       -    def sign_message(self, address, message, password):
       -        if self.has_seed():
       -            return BIP32_HD_Wallet.sign_message(self, address, message, password)
       -        if not self.check_proper_device():
       -            give_error('Wrong device or password')
       -        try:
       -            address_path = self.address_id(address)
       -            address_n = self.plugin.get_client().expand_path(address_path)
       -        except Exception, e:
       -            give_error(e)
       -        try:
       -            msg_sig = self.plugin.get_client().sign_message('Bitcoin', address_n, message)
       -        except Exception, e:
       -            give_error(e)
       -        finally:
       -            self.plugin.handler.stop()
       -        return msg_sig.signature
       -
       -    def sign_transaction(self, tx, password):
       -        if self.has_seed():
       -            return BIP32_HD_Wallet.sign_transaction(self, tx, password)
       -        if tx.is_complete():
       -            return
       -        if not self.check_proper_device():
       -            give_error('Wrong device or password')
       -        # previous transactions used as inputs
       -        prev_tx = {}
       -        # path of the xpubs that are involved
       -        xpub_path = {}
       -        for txin in tx.inputs:
       -            tx_hash = txin['prevout_hash']
       -
       -            ptx = self.transactions.get(tx_hash)
       -            if ptx is None:
       -                ptx = self.network.synchronous_get(('blockchain.transaction.get', [tx_hash]))
       -                ptx = Transaction(ptx)
       -            prev_tx[tx_hash] = ptx
       -
       -            for x_pubkey in txin['x_pubkeys']:
       -                account_derivation = None
       -                if not is_extended_pubkey(x_pubkey):
       -                    continue
       -                xpub = x_to_xpub(x_pubkey)
       -                for k, v in self.master_public_keys.items():
       -                    if v == xpub:
       -                        account_id = re.match("x/(\d+)'", k).group(1)
       -                        account_derivation = "44'/0'/%s'"%account_id
       -                if account_derivation is not None:
       -                    xpub_path[xpub] = account_derivation
       -
       -        self.plugin.sign_transaction(tx, prev_tx, xpub_path)
       -
       -    def check_proper_device(self):
       -        self.get_client().ping('t')
       -        if not self.device_checked:
       -            address = self.addresses(False)[0]
       -            address_id = self.address_id(address)
       -            n = self.get_client().expand_path(address_id)
       -            device_address = self.get_client().get_address('Bitcoin', n)
       -            self.device_checked = True
       -
       -            if device_address != address:
       -                self.proper_device = False
       -            else:
       -                self.proper_device = True
       -
       -        return self.proper_device
       -
       +    device = 'KeepKey'
        
        
        class KeepKeyPlugin(BasePlugin):
       t@@ -277,8 +111,7 @@ class KeepKeyPlugin(BasePlugin):
        
        
            def show_address(self, address):
       -        if not self.wallet.check_proper_device():
       -            give_error('Wrong device or password')
       +        self.wallet.check_proper_device()
                try:
                    address_path = self.wallet.address_id(address)
                    address_n = self.get_client().expand_path(address_path)
   DIR diff --git a/plugins/keepkey/qt.py b/plugins/keepkey/qt.py
       t@@ -23,15 +23,9 @@ class Plugin(KeepKeyPlugin):
                    window.statusBar().addPermanentWidget(self.keepkey_button)
                if self.handler is None:
                    self.handler = KeepKeyQtHandler(window)
       -        try:
       -            self.get_client().ping('t')
       -        except BaseException as e:
       -            window.show_error(_('KeepKey device not detected.\nContinuing in watching-only mode.\nReason:\n' + str(e)))
       -            self.wallet.force_watching_only = True
       -            return
       -        if self.wallet.addresses() and not self.wallet.check_proper_device():
       -            window.show_error(_("This wallet does not match your KeepKey device"))
       -            self.wallet.force_watching_only = True
       +        msg = self.wallet.sanity_check()
       +        if msg:
       +            window.show_error(msg)
        
            @hook
            def installwizard_load_wallet(self, wallet, window):
       t@@ -161,6 +155,8 @@ class KeepKeyQtHandler:
                self.done.set()
        
            def message_dialog(self):
       +        # Called more than once during signing, to confirm output and fee
       +        self.dialog_stop()
                self.d = WindowModalDialog(self.win, _('Please Check KeepKey Device'))
                l = QLabel(self.message)
                vbox = QVBoxLayout(self.d)
       t@@ -173,4 +169,6 @@ class KeepKeyQtHandler:
                self.d.show()
        
            def dialog_stop(self):
       -        self.d.hide()
       +        if self.d:
       +            self.d.hide()
       +            self.d = None
   DIR diff --git a/plugins/trezor/qt.py b/plugins/trezor/qt.py
       t@@ -23,6 +23,7 @@ class TrezorQtHandler:
                self.win.connect(win, SIGNAL('pin_dialog'), self.pin_dialog)
                self.win.connect(win, SIGNAL('passphrase_dialog'), self.passphrase_dialog)
                self.done = threading.Event()
       +        self.d = None
        
            def stop(self):
                self.win.emit(SIGNAL('trezor_done'))
       t@@ -75,6 +76,8 @@ class TrezorQtHandler:
                self.done.set()
        
            def message_dialog(self):
       +        # Called more than once during signing, to confirm output and fee
       +        self.dialog_stop()
                self.d = WindowModalDialog(self.win, _('Please Check Trezor Device'))
                l = QLabel(self.message)
                vbox = QVBoxLayout(self.d)
       t@@ -82,8 +85,9 @@ class TrezorQtHandler:
                self.d.show()
        
            def dialog_stop(self):
       -        self.d.hide()
       -
       +        if self.d:
       +            self.d.hide()
       +            self.d = None
        
        class Plugin(TrezorPlugin):
        
       t@@ -97,15 +101,9 @@ class Plugin(TrezorPlugin):
                    window.statusBar().addPermanentWidget(self.trezor_button)
                if self.handler is None:
                    self.handler = TrezorQtHandler(window)
       -        try:
       -            self.get_client().ping('t')
       -        except BaseException as e:
       -            window.show_error(_('Trezor device not detected.\nContinuing in watching-only mode.\nReason:\n' + str(e)))
       -            self.wallet.force_watching_only = True
       -            return
       -        if self.wallet.addresses() and not self.wallet.check_proper_device():
       -            window.show_error(_("This wallet does not match your Trezor device"))
       -            self.wallet.force_watching_only = True
       +        msg = self.wallet.sanity_check()
       +        if msg:
       +            window.show_error(msg)
        
            @hook
            def installwizard_load_wallet(self, wallet, window):
   DIR diff --git a/plugins/trezor/trezor.py b/plugins/trezor/trezor.py
       t@@ -1,23 +1,16 @@
        from binascii import unhexlify
       -from struct import pack
        from sys import stderr
       -from time import sleep
       -import unicodedata
       -import threading
       -import re
       -
        
        import electrum
        from electrum import bitcoin
        
        from electrum.account import BIP32_Account
       -from electrum.bitcoin import EncodeBase58Check, public_key_to_bc_address, bc_address_to_hash_160, xpub_from_pubkey
       +from electrum.bitcoin import bc_address_to_hash_160, xpub_from_pubkey
        from electrum.i18n import _
       -from electrum.plugins import BasePlugin, hook, always_hook, run_hook
       -from electrum.transaction import Transaction, deserialize, is_extended_pubkey, x_to_xpub
       -from electrum.wallet import BIP32_HD_Wallet
       -from electrum.util import print_error, print_msg
       -from electrum.wallet import pw_decode, bip32_private_derivation, bip32_root
       +from electrum.plugins import BasePlugin, hook
       +from electrum.transaction import deserialize, is_extended_pubkey
       +from electrum.wallet import BIP32_Hardware_Wallet
       +from electrum.util import print_error
        
        try:
            from trezorlib.client import types
       t@@ -30,9 +23,6 @@ except ImportError:
        
        import trezorlib.ckd_public as ckd_public
        
       -
       -
       -
        def log(msg):
            stderr.write("%s\n" % msg)
            stderr.flush()
       t@@ -42,161 +32,10 @@ def give_error(message):
            raise Exception(message)
        
        
       -class TrezorWallet(BIP32_HD_Wallet):
       +class TrezorWallet(BIP32_Hardware_Wallet):
            wallet_type = 'trezor'
            root_derivation = "m/44'/0'"
       -
       -    def __init__(self, storage):
       -        BIP32_HD_Wallet.__init__(self, storage)
       -        self.mpk = None
       -        self.device_checked = False
       -        self.proper_device = False
       -        self.force_watching_only = False
       -
       -    def get_action(self):
       -        if not self.accounts:
       -            return 'create_accounts'
       -
       -    def can_import(self):
       -        return False
       -
       -    def can_sign_xpubkey(self, x_pubkey):
       -        xpub, sequence = BIP32_Account.parse_xpubkey(x_pubkey)
       -        return xpub in self.master_public_keys.values()
       -
       -    def can_export(self):
       -        return False
       -
       -    def can_create_accounts(self):
       -        return True
       -
       -    def can_change_password(self):
       -        return False
       -
       -    def is_watching_only(self):
       -        return self.force_watching_only
       -
       -    def get_client(self):
       -        return self.plugin.get_client()
       -
       -    def address_id(self, address):
       -        account_id, (change, address_index) = self.get_address_index(address)
       -        return "44'/0'/%s'/%d/%d" % (account_id, change, address_index)
       -
       -    def mnemonic_to_seed(self, mnemonic, passphrase):
       -        # trezor uses bip39
       -        import pbkdf2, hashlib, hmac
       -        PBKDF2_ROUNDS = 2048
       -        mnemonic = unicodedata.normalize('NFKD', ' '.join(mnemonic.split()))
       -        passphrase = unicodedata.normalize('NFKD', passphrase)
       -        return pbkdf2.PBKDF2(mnemonic, 'mnemonic' + passphrase, iterations = PBKDF2_ROUNDS, macmodule = hmac, digestmodule = hashlib.sha512).read(64)
       -
       -    def derive_xkeys(self, root, derivation, password):
       -        x = self.master_private_keys.get(root)
       -        if x:
       -            root_xprv = pw_decode(x, password)
       -            xprv, xpub = bip32_private_derivation(root_xprv, root, derivation)
       -            return xpub, xprv
       -        else:
       -            derivation = derivation.replace(self.root_name,"44'/0'/")
       -            xpub = self.get_public_key(derivation)
       -            return xpub, None
       -
       -    def get_public_key(self, bip32_path):
       -        address_n = self.plugin.get_client().expand_path(bip32_path)
       -        node = self.plugin.get_client().get_public_node(address_n).node
       -        xpub = "0488B21E".decode('hex') + chr(node.depth) + self.i4b(node.fingerprint) + self.i4b(node.child_num) + node.chain_code + node.public_key
       -        return EncodeBase58Check(xpub)
       -
       -    def get_master_public_key(self):
       -        if not self.mpk:
       -            self.mpk = self.get_public_key("44'/0'")
       -        return self.mpk
       -
       -    def i4b(self, x):
       -        return pack('>I', x)
       -
       -    def add_keypairs(self, tx, keypairs, password):
       -        #do nothing - no priv keys available
       -        pass
       -
       -    def decrypt_message(self, pubkey, message, password):
       -        raise BaseException( _('Decrypt method is not implemented in Trezor') )
       -        #address = public_key_to_bc_address(pubkey.decode('hex'))
       -        #address_path = self.address_id(address)
       -        #address_n = self.get_client().expand_path(address_path)
       -        #try:
       -        #    decrypted_msg = self.get_client().decrypt_message(address_n, b64decode(message))
       -        #except Exception, e:
       -        #    give_error(e)
       -        #finally:
       -        #    twd.stop()
       -        #return str(decrypted_msg)
       -
       -    def sign_message(self, address, message, password):
       -        if self.has_seed():
       -            return BIP32_HD_Wallet.sign_message(self, address, message, password)
       -        if not self.check_proper_device():
       -            give_error('Wrong device or password')
       -        try:
       -            address_path = self.address_id(address)
       -            address_n = self.plugin.get_client().expand_path(address_path)
       -        except Exception, e:
       -            give_error(e)
       -        try:
       -            msg_sig = self.plugin.get_client().sign_message('Bitcoin', address_n, message)
       -        except Exception, e:
       -            give_error(e)
       -        finally:
       -            self.plugin.handler.stop()
       -        return msg_sig.signature
       -
       -    def sign_transaction(self, tx, password):
       -        if self.has_seed():
       -            return BIP32_HD_Wallet.sign_transaction(self, tx, password)
       -        if tx.is_complete():
       -            return
       -        if not self.check_proper_device():
       -            give_error('Wrong device or password')
       -        # previous transactions used as inputs
       -        prev_tx = {}
       -        # path of the xpubs that are involved
       -        xpub_path = {}
       -        for txin in tx.inputs:
       -            tx_hash = txin['prevout_hash']
       -
       -            ptx = self.transactions.get(tx_hash)
       -            if ptx is None:
       -                ptx = self.network.synchronous_get(('blockchain.transaction.get', [tx_hash]))
       -                ptx = Transaction(ptx)
       -            prev_tx[tx_hash] = ptx
       -
       -            for x_pubkey in txin['x_pubkeys']:
       -                account_derivation = None
       -                if not is_extended_pubkey(x_pubkey):
       -                    continue
       -                xpub = x_to_xpub(x_pubkey)
       -                for k, v in self.master_public_keys.items():
       -                    if v == xpub:
       -                        account_id = re.match("x/(\d+)'", k).group(1)
       -                        account_derivation = "44'/0'/%s'"%account_id
       -                if account_derivation is not None:
       -                    xpub_path[xpub] = account_derivation
       -
       -        self.plugin.sign_transaction(tx, prev_tx, xpub_path)
       -
       -    def check_proper_device(self):
       -        self.get_client().ping('t')
       -        if not self.device_checked:
       -            address = self.addresses(False)[0]
       -            address_id = self.address_id(address)
       -            n = self.get_client().expand_path(address_id)
       -            device_address = self.get_client().get_address('Bitcoin', n)
       -            self.device_checked = True
       -            self.proper_device = (device_address == address)
       -
       -        return self.proper_device
       -
       +    device = 'Trezor'
        
        
        class TrezorPlugin(BasePlugin):