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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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