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Create hw_wallet directory for common code 

Quite a lot of code under trezor/ can be shared with the
Ledger code.  This is the first step for wallets.
master
Neil Booth 10 years ago
parent
6b68968d04
commit
e461c1c818
3 changed files with 110 additions and 86 deletions
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  1. 1
      plugins/hw_wallet/__init__.py
  2. 107
      plugins/hw_wallet/hw_wallet.py
  3. 88
      plugins/trezor/plugin.py

1
plugins/hw_wallet/__init__.py
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@ -0,0 +1 @@
from hw_wallet import BIP44_HW_Wallet

107
plugins/hw_wallet/hw_wallet.py
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@ -0,0 +1,107 @@
#!/usr/bin/env python2
# -*- mode: python -*-
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2016 The Electrum developers
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from struct import pack
from electrum.wallet import BIP44_Wallet
class BIP44_HW_Wallet(BIP44_Wallet):
'''A BIP44 hardware wallet base class.'''
# Derived classes must set:
# - device
# - DEVICE_IDS
# - wallet_type
restore_wallet_class = BIP44_Wallet
max_change_outputs = 1
def __init__(self, storage):
BIP44_Wallet.__init__(self, storage)
# After timeout seconds we clear the device session
self.session_timeout = storage.get('session_timeout', 180)
# Errors and other user interaction is done through the wallet's
# handler. The handler is per-window and preserved across
# device reconnects
self.handler = None
self.force_watching_only = True
def set_session_timeout(self, seconds):
self.print_error("setting session timeout to %d seconds" % seconds)
self.session_timeout = seconds
self.storage.put('session_timeout', seconds)
def unpaired(self):
'''A device paired with the wallet was diconnected. This can be
called in any thread context.'''
self.print_error("unpaired")
self.force_watching_only = True
self.handler.watching_only_changed()
def paired(self):
'''A device paired with the wallet was (re-)connected. This can be
called in any thread context.'''
self.print_error("paired")
self.force_watching_only = False
self.handler.watching_only_changed()
def timeout(self):
'''Called when the wallet session times out. Note this is called from
the Plugins thread.'''
client = self.get_client(force_pair=False)
if client:
client.clear_session()
self.print_error("timed out")
def get_action(self):
pass
def can_create_accounts(self):
return True
def can_export(self):
return False
def is_watching_only(self):
'''The wallet is watching-only if its trezor device is unpaired.'''
assert not self.has_seed()
return self.force_watching_only
def can_change_password(self):
return False
def get_client(self, force_pair=True):
return self.plugin.get_client(self, force_pair)
def first_address(self):
'''Used to check a hardware wallet matches a software wallet'''
account = self.accounts.get('0')
derivation = self.address_derivation('0', 0, 0)
return (account.first_address()[0] if account else None, derivation)
def derive_xkeys(self, root, derivation, password):
if self.master_public_keys.get(self.root_name):
return BIP44_wallet.derive_xkeys(self, root, derivation, password)
# When creating a wallet we need to ask the device for the
# master public key
xpub = self.get_public_key(derivation)
return xpub, None
def i4b(self, x):
return pack('>I', x)

88
plugins/trezor/plugin.py
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@ -5,7 +5,6 @@ import time
from binascii import unhexlify
from functools import partial
from struct import pack
from electrum.account import BIP32_Account
from electrum.bitcoin import (bc_address_to_hash_160, xpub_from_pubkey,
@ -15,7 +14,7 @@ from electrum.i18n import _
from electrum.plugins import BasePlugin, hook
from electrum.transaction import (deserialize, is_extended_pubkey,
Transaction, x_to_xpub)
from electrum.wallet import BIP44_Wallet
from ..hw_wallet import BIP44_HW_Wallet
from electrum.util import ThreadJob
@ -25,87 +24,7 @@ TIM_NEW, TIM_RECOVER, TIM_MNEMONIC, TIM_PRIVKEY = range(0, 4)
class DeviceDisconnectedError(Exception):
pass
class TrezorCompatibleWallet(BIP44_Wallet):
# Extend BIP44 Wallet as required by hardware implementation.
# Derived classes must set:
# - device
# - DEVICE_IDS
# - wallet_type
restore_wallet_class = BIP44_Wallet
max_change_outputs = 1
def __init__(self, storage):
BIP44_Wallet.__init__(self, storage)
# After timeout seconds we clear the device session
self.session_timeout = storage.get('session_timeout', 180)
# Errors and other user interaction is done through the wallet's
# handler. The handler is per-window and preserved across
# device reconnects
self.handler = None
self.force_watching_only = True
def set_session_timeout(self, seconds):
self.print_error("setting session timeout to %d seconds" % seconds)
self.session_timeout = seconds
self.storage.put('session_timeout', seconds)
def unpaired(self):
'''A device paired with the wallet was diconnected. This can be
called in any thread context.'''
self.print_error("unpaired")
self.force_watching_only = True
self.handler.watching_only_changed()
def paired(self):
'''A device paired with the wallet was (re-)connected. This can be
called in any thread context.'''
self.print_error("paired")
self.force_watching_only = False
self.handler.watching_only_changed()
def timeout(self):
'''Called when the wallet session times out. Note this is called from
the Plugins thread.'''
client = self.get_client(force_pair=False)
if client:
client.clear_session()
self.print_error("timed out")
def get_action(self):
pass
def can_create_accounts(self):
return True
def can_export(self):
return False
def is_watching_only(self):
'''The wallet is watching-only if its trezor device is unpaired.'''
assert not self.has_seed()
return self.force_watching_only
def can_change_password(self):
return False
def get_client(self, force_pair=True):
return self.plugin.get_client(self, force_pair)
def first_address(self):
'''Used to check a hardware wallet matches a software wallet'''
account = self.accounts.get('0')
derivation = self.address_derivation('0', 0, 0)
return (account.first_address()[0] if account else None, derivation)
def derive_xkeys(self, root, derivation, password):
if self.master_public_keys.get(self.root_name):
return BIP44_wallet.derive_xkeys(self, root, derivation, password)
# When creating a wallet we need to ask the device for the
# master public key
xpub = self.get_public_key(derivation)
return xpub, None
class TrezorCompatibleWallet(BIP44_HW_Wallet):
def get_public_key(self, bip32_path):
client = self.get_client()
@ -116,9 +35,6 @@ class TrezorCompatibleWallet(BIP44_Wallet):
+ node.chain_code + node.public_key)
return EncodeBase58Check(xpub)
def i4b(self, x):
return pack('>I', x)
def decrypt_message(self, pubkey, message, password):
address = public_key_to_bc_address(pubkey.decode('hex'))
client = self.get_client()

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