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