lib/wallet.py

   1 #!/usr/bin/env python
   2 #
   3 # Electrum - lightweight Bitcoin client
   4 # Copyright (C) 2011 thomasv@gitorious
   5 #
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
  18
  19 import sys
  20 import base64
  21 import os
  22 import re
  23 import hashlib
  24 import copy
  25 import operator
  26 import ast
  27 import threading
  28 import random
  29 import aes
  30 import Queue
  31 import time
  32 import math
  33
  34 from util import print_msg, print_error, format_satoshis
  35 from bitcoin import *
  36 from account import *
  37 from transaction import Transaction, is_extended_pubkey
  38 from plugins import run_hook
  39 import bitcoin
  40 from synchronizer import WalletSynchronizer
  41
  42 COINBASE_MATURITY = 100
  43 DUST_THRESHOLD = 5430
  44
  45 # internal ID for imported account
  46 IMPORTED_ACCOUNT = '/x'
  47
  48
  49
  50 from version import *
  51
  52
  53 class WalletStorage:
  54
  55     def __init__(self, config):
  56         self.lock = threading.Lock()
  57         self.config = config
  58         self.data = {}
  59         self.file_exists = False
  60         self.path = self.init_path(config)
  61         print_error( "wallet path", self.path )
  62         if self.path:
  63             self.read(self.path)
  64
  65
  66     def init_path(self, config):
  67         """Set the path of the wallet."""
  68
  69         # command line -w option
  70         path = config.get('wallet_path')
  71         if path:
  72             return path
  73
  74         # path in config file
  75         path = config.get('default_wallet_path')
  76         if path:
  77             return path
  78
  79         # default path
  80         dirpath = os.path.join(config.path, "wallets")
  81         if not os.path.exists(dirpath):
  82             os.mkdir(dirpath)
  83
  84         new_path = os.path.join(config.path, "wallets", "default_wallet")
  85
  86         # default path in pre 1.9 versions
  87         old_path = os.path.join(config.path, "electrum.dat")
  88         if os.path.exists(old_path) and not os.path.exists(new_path):
  89             os.rename(old_path, new_path)
  90
  91         return new_path
  92
  93
  94     def read(self, path):
  95         """Read the contents of the wallet file."""
  96         try:
  97             with open(self.path, "r") as f:
  98                 data = f.read()
  99         except IOError:
 100             return
 101         try:
 102             d = ast.literal_eval( data )  #parse raw data from reading wallet file
 103         except Exception:
 104             raise IOError("Cannot read wallet file.")
 105
 106         self.data = d
 107         self.file_exists = True
 108
 109
 110     def get(self, key, default=None):
 111         v = self.data.get(key)
 112         if v is None:
 113             v = default
 114         return v
 115
 116     def put(self, key, value, save = True):
 117
 118         with self.lock:
 119             if value is not None:
 120                 self.data[key] = value
 121             elif key in self.data:
 122                 self.data.pop(key)
 123             if save:
 124                 self.write()
 125
 126     def write(self):
 127         s = repr(self.data)
 128         f = open(self.path,"w")
 129         f.write( s )
 130         f.close()
 131         if 'ANDROID_DATA' not in os.environ:
 132             import stat
 133             os.chmod(self.path,stat.S_IREAD | stat.S_IWRITE)
 134
 135
 136
 137
 138
 139
 140
 141 class Abstract_Wallet:
 142
 143     def __init__(self, storage):
 144
 145         self.storage = storage
 146         self.electrum_version = ELECTRUM_VERSION
 147         self.gap_limit_for_change = 3 # constant
 148         # saved fields
 149         self.seed_version          = storage.get('seed_version', NEW_SEED_VERSION)
 150         self.gap_limit             = storage.get('gap_limit', 5)
 151         self.use_change            = storage.get('use_change',True)
 152         self.use_encryption        = storage.get('use_encryption', False)
 153         self.seed                  = storage.get('seed', '')               # encrypted
 154         self.labels                = storage.get('labels', {})
 155         self.frozen_addresses      = storage.get('frozen_addresses',[])
 156         self.addressbook           = storage.get('contacts', [])
 157
 158         self.history               = storage.get('addr_history',{})        # address -> list(txid, height)
 159
 160         self.fee                   = int(storage.get('fee_per_kb', 10000))
 161
 162         self.master_public_keys = storage.get('master_public_keys',{})
 163         self.master_private_keys = storage.get('master_private_keys', {})
 164
 165         self.next_addresses = storage.get('next_addresses',{})
 166
 167
 168         # This attribute is set when wallet.start_threads is called.
 169         self.synchronizer = None
 170
 171         self.load_accounts()
 172
 173         self.transactions = {}
 174         tx_list = self.storage.get('transactions',{})
 175         for k,v in tx_list.items():
 176             try:
 177                 tx = Transaction(v)
 178             except Exception:
 179                 print_msg("Warning: Cannot deserialize transactions. skipping")
 180                 continue
 181
 182             self.add_extra_addresses(tx)
 183             self.transactions[k] = tx
 184
 185         for h,tx in self.transactions.items():
 186             if not self.check_new_tx(h, tx):
 187                 print_error("removing unreferenced tx", h)
 188                 self.transactions.pop(h)
 189
 190
 191         # not saved
 192         self.prevout_values = {}     # my own transaction outputs
 193         self.spent_outputs = []
 194
 195         # spv
 196         self.verifier = None
 197
 198         # there is a difference between wallet.up_to_date and interface.is_up_to_date()
 199         # interface.is_up_to_date() returns true when all requests have been answered and processed
 200         # wallet.up_to_date is true when the wallet is synchronized (stronger requirement)
 201
 202         self.up_to_date = False
 203         self.lock = threading.Lock()
 204         self.transaction_lock = threading.Lock()
 205         self.tx_event = threading.Event()
 206
 207         for tx_hash, tx in self.transactions.items():
 208             self.update_tx_outputs(tx_hash)
 209
 210
 211     def add_extra_addresses(self, tx):
 212         h = tx.hash()
 213         # find the address corresponding to pay-to-pubkey inputs
 214         tx.add_extra_addresses(self.transactions)
 215         for o in tx.d.get('outputs'):
 216             if o.get('is_pubkey'):
 217                 for tx2 in self.transactions.values():
 218                     tx2.add_extra_addresses({h:tx})
 219
 220
 221     def get_action(self):
 222         pass
 223
 224
 225     def convert_imported_keys(self, password):
 226         for k, v in self.imported_keys.items():
 227             sec = pw_decode(v, password)
 228             pubkey = public_key_from_private_key(sec)
 229             address = public_key_to_bc_address(pubkey.decode('hex'))
 230             assert address == k
 231             self.import_key(sec, password)
 232             self.imported_keys.pop(k)
 233         self.storage.put('imported_keys', self.imported_keys)
 234
 235
 236     def load_accounts(self):
 237         self.accounts = {}
 238         self.imported_keys = self.storage.get('imported_keys',{})
 239
 240         d = self.storage.get('accounts', {})
 241         for k, v in d.items():
 242             if k == 0:
 243                 v['mpk'] = self.storage.get('master_public_key')
 244                 self.accounts[k] = OldAccount(v)
 245             elif v.get('imported'):
 246                 self.accounts[k] = ImportedAccount(v)
 247             elif v.get('xpub3'):
 248                 self.accounts[k] = BIP32_Account_2of3(v)
 249             elif v.get('xpub2'):
 250                 self.accounts[k] = BIP32_Account_2of2(v)
 251             elif v.get('xpub'):
 252                 self.accounts[k] = BIP32_Account(v)
 253             elif v.get('pending'):
 254                 self.accounts[k] = PendingAccount(v)
 255             else:
 256                 print_error("cannot load account", v)
 257
 258
 259     def synchronize(self):
 260         pass
 261
 262     def can_create_accounts(self):
 263         return False
 264
 265     def set_up_to_date(self,b):
 266         with self.lock: self.up_to_date = b
 267
 268     def is_up_to_date(self):
 269         with self.lock: return self.up_to_date
 270
 271
 272     def update(self):
 273         self.up_to_date = False
 274         while not self.is_up_to_date():
 275             time.sleep(0.1)
 276
 277     def is_imported(self, addr):
 278         account = self.accounts.get(IMPORTED_ACCOUNT)
 279         if account:
 280             return addr in account.get_addresses(0)
 281         else:
 282             return False
 283
 284     def has_imported_keys(self):
 285         account = self.accounts.get(IMPORTED_ACCOUNT)
 286         return account is not None
 287
 288     def import_key(self, sec, password):
 289         try:
 290             pubkey = public_key_from_private_key(sec)
 291             address = public_key_to_bc_address(pubkey.decode('hex'))
 292         except Exception:
 293             raise Exception('Invalid private key')
 294
 295         if self.is_mine(address):
 296             raise Exception('Address already in wallet')
 297
 298         if self.accounts.get(IMPORTED_ACCOUNT) is None:
 299             self.accounts[IMPORTED_ACCOUNT] = ImportedAccount({'imported':{}})
 300         self.accounts[IMPORTED_ACCOUNT].add(address, pubkey, sec, password)
 301         self.save_accounts()
 302
 303         if self.synchronizer:
 304             self.synchronizer.subscribe_to_addresses([address])
 305         return address
 306
 307
 308     def delete_imported_key(self, addr):
 309         account = self.accounts[IMPORTED_ACCOUNT]
 310         account.remove(addr)
 311         if not account.get_addresses(0):
 312             self.accounts.pop(IMPORTED_ACCOUNT)
 313         self.save_accounts()
 314
 315
 316     def set_label(self, name, text = None):
 317         changed = False
 318         old_text = self.labels.get(name)
 319         if text:
 320             if old_text != text:
 321                 self.labels[name] = text
 322                 changed = True
 323         else:
 324             if old_text:
 325                 self.labels.pop(name)
 326                 changed = True
 327
 328         if changed:
 329             self.storage.put('labels', self.labels, True)
 330
 331         run_hook('set_label', name, text, changed)
 332         return changed
 333
 334
 335
 336
 337     def addresses(self, include_change = True, _next=True):
 338         o = []
 339         for a in self.accounts.keys():
 340             o += self.get_account_addresses(a, include_change)
 341
 342         if _next:
 343             for addr in self.next_addresses.values():
 344                 if addr not in o:
 345                     o += [addr]
 346         return o
 347
 348
 349     def is_mine(self, address):
 350         return address in self.addresses(True)
 351
 352
 353     def is_change(self, address):
 354         if not self.is_mine(address): return False
 355         acct, s = self.get_address_index(address)
 356         if s is None: return False
 357         return s[0] == 1
 358
 359
 360     def get_address_index(self, address):
 361
 362         for account in self.accounts.keys():
 363             for for_change in [0,1]:
 364                 addresses = self.accounts[account].get_addresses(for_change)
 365                 for addr in addresses:
 366                     if address == addr:
 367                         return account, (for_change, addresses.index(addr))
 368
 369         for k,v in self.next_addresses.items():
 370             if v == address:
 371                 return k, (0,0)
 372
 373         raise Exception("Address not found", address)
 374
 375
 376     def getpubkeys(self, addr):
 377         assert is_valid(addr) and self.is_mine(addr)
 378         account, sequence = self.get_address_index(addr)
 379         a = self.accounts[account]
 380         return a.get_pubkeys( sequence )
 381
 382
 383     def get_private_key(self, address, password):
 384         if self.is_watching_only():
 385             return []
 386         account_id, sequence = self.get_address_index(address)
 387         return self.accounts[account_id].get_private_key(sequence, self, password)
 388
 389
 390     def get_public_keys(self, address):
 391         account_id, sequence = self.get_address_index(address)
 392         return self.accounts[account_id].get_pubkeys(sequence)
 393
 394
 395     def add_keypairs(self, tx, keypairs, password):
 396         # first check the provided password
 397         seed = self.get_seed(password)
 398
 399         for txin in tx.inputs:
 400             x_pubkeys = txin['x_pubkeys']
 401             address = txin['address']
 402
 403             if self.is_mine(address):
 404
 405                 private_keys = self.get_private_key(address, password)
 406                 for sec in private_keys:
 407                     pubkey = public_key_from_private_key(sec)
 408                     keypairs[ pubkey ] = sec
 409
 410             else:
 411
 412                 from account import BIP32_Account, OldAccount
 413                 for x_pubkey in x_pubkeys:
 414                     if not is_extended_pubkey(x_pubkey):
 415                         continue
 416
 417                     if x_pubkey[0:2] == 'ff':
 418                         xpub, sequence = BIP32_Account.parse_xpubkey(x_pubkey)
 419                     elif x_pubkey[0:2] == 'fe':
 420                         xpub, sequence = OldAccount.parse_xpubkey(x_pubkey)
 421
 422                     # look for account that can sign
 423                     for k, account in self.accounts.items():
 424                         if xpub in account.get_master_pubkeys():
 425                             break
 426                     else:
 427                         continue
 428
 429                     addr = account.get_address(*sequence)
 430                     assert txin['address'] == addr
 431                     pk = self.get_private_key(addr, password)
 432                     for sec in pk:
 433                         pubkey = public_key_from_private_key(sec)
 434                         keypairs[pubkey] = sec
 435
 436
 437
 438
 439     def signrawtransaction(self, tx, private_keys, password):
 440
 441         # check that the password is correct
 442         seed = self.get_seed(password)
 443
 444         # build a list of public/private keys
 445         keypairs = {}
 446
 447         # add private keys from parameter
 448         for sec in private_keys:
 449             pubkey = public_key_from_private_key(sec)
 450             keypairs[ pubkey ] = sec
 451
 452         # add private_keys
 453         self.add_keypairs(tx, keypairs, password)
 454
 455         # sign the transaction
 456         self.sign_transaction(tx, keypairs, password)
 457
 458
 459     def sign_message(self, address, message, password):
 460         keys = self.get_private_key(address, password)
 461         assert len(keys) == 1
 462         sec = keys[0]
 463         key = regenerate_key(sec)
 464         compressed = is_compressed(sec)
 465         return key.sign_message(message, compressed, address)
 466
 467
 468
 469     def decrypt_message(self, pubkey, message, password):
 470         address = public_key_to_bc_address(pubkey.decode('hex'))
 471         keys = self.get_private_key(address, password)
 472         secret = keys[0]
 473         ec = regenerate_key(secret)
 474         decrypted = ec.decrypt_message(message)
 475         return decrypted
 476
 477
 478
 479     def is_found(self):
 480         return self.history.values() != [[]] * len(self.history)
 481
 482
 483     def add_contact(self, address, label=None):
 484         self.addressbook.append(address)
 485         self.storage.put('contacts', self.addressbook, True)
 486         if label:
 487             self.set_label(address, label)
 488
 489
 490     def delete_contact(self, addr):
 491         if addr in self.addressbook:
 492             self.addressbook.remove(addr)
 493             self.storage.put('addressbook', self.addressbook, True)
 494
 495
 496     def fill_addressbook(self):
 497         for tx_hash, tx in self.transactions.items():
 498             is_relevant, is_send, _, _ = self.get_tx_value(tx)
 499             if is_send:
 500                 for addr, v in tx.outputs:
 501                     if not self.is_mine(addr) and addr not in self.addressbook:
 502                         self.addressbook.append(addr)
 503         # redo labels
 504         # self.update_tx_labels()
 505
 506     def get_num_tx(self, address):
 507         n = 0
 508         for tx in self.transactions.values():
 509             if address in map(lambda x:x[0], tx.outputs): n += 1
 510         return n
 511
 512
 513     def get_address_flags(self, addr):
 514         flags = "C" if self.is_change(addr) else "I" if addr in self.imported_keys.keys() else "-"
 515         flags += "F" if addr in self.frozen_addresses else "-"
 516         return flags
 517
 518
 519     def get_tx_value(self, tx, account=None):
 520         domain = self.get_account_addresses(account)
 521         return tx.get_value(domain, self.prevout_values)
 522
 523
 524     def update_tx_outputs(self, tx_hash):
 525         tx = self.transactions.get(tx_hash)
 526
 527         for i, (addr, value) in enumerate(tx.outputs):
 528             key = tx_hash+ ':%d'%i
 529             self.prevout_values[key] = value
 530
 531         for item in tx.inputs:
 532             if self.is_mine(item.get('address')):
 533                 key = item['prevout_hash'] + ':%d'%item['prevout_n']
 534                 self.spent_outputs.append(key)
 535
 536
 537     def get_addr_balance(self, address):
 538         #assert self.is_mine(address)
 539         h = self.history.get(address,[])
 540         if h == ['*']: return 0,0
 541         c = u = 0
 542         received_coins = []   # list of coins received at address
 543
 544         for tx_hash, tx_height in h:
 545             tx = self.transactions.get(tx_hash)
 546             if not tx: continue
 547
 548             for i, (addr, value) in enumerate(tx.outputs):
 549                 if addr == address:
 550                     key = tx_hash + ':%d'%i
 551                     received_coins.append(key)
 552
 553         for tx_hash, tx_height in h:
 554             tx = self.transactions.get(tx_hash)
 555             if not tx: continue
 556             v = 0
 557
 558             for item in tx.inputs:
 559                 addr = item.get('address')
 560                 if addr == address:
 561                     key = item['prevout_hash']  + ':%d'%item['prevout_n']
 562                     value = self.prevout_values.get( key )
 563                     if key in received_coins:
 564                         v -= value
 565
 566             for i, (addr, value) in enumerate(tx.outputs):
 567                 key = tx_hash + ':%d'%i
 568                 if addr == address:
 569                     v += value
 570
 571             if tx_height:
 572                 c += v
 573             else:
 574                 u += v
 575         return c, u
 576
 577
 578     def get_account_name(self, k):
 579         return self.labels.get(k, self.accounts[k].get_name(k))
 580
 581
 582     def get_account_names(self):
 583         account_names = {}
 584         for k in self.accounts.keys():
 585             account_names[k] = self.get_account_name(k)
 586         return account_names
 587
 588
 589     def get_account_addresses(self, a, include_change=True):
 590         if a is None:
 591             o = self.addresses(True)
 592         elif a in self.accounts:
 593             ac = self.accounts[a]
 594             o = ac.get_addresses(0)
 595             if include_change: o += ac.get_addresses(1)
 596         return o
 597
 598
 599     def get_account_balance(self, account):
 600         return self.get_balance(self.get_account_addresses(account))
 601
 602     def get_frozen_balance(self):
 603         return self.get_balance(self.frozen_addresses)
 604
 605     def get_balance(self, domain=None):
 606         if domain is None: domain = self.addresses(True)
 607         cc = uu = 0
 608         for addr in domain:
 609             c, u = self.get_addr_balance(addr)
 610             cc += c
 611             uu += u
 612         return cc, uu
 613
 614
 615     def get_unspent_coins(self, domain=None):
 616         coins = []
 617         if domain is None: domain = self.addresses(True)
 618         for addr in domain:
 619             h = self.history.get(addr, [])
 620             if h == ['*']: continue
 621             for tx_hash, tx_height in h:
 622                 tx = self.transactions.get(tx_hash)
 623                 if tx is None: raise Exception("Wallet not synchronized")
 624                 is_coinbase = tx.inputs[0].get('prevout_hash') == '0'*64
 625                 for o in tx.d.get('outputs'):
 626                     output = o.copy()
 627                     if output.get('address') != addr: continue
 628                     key = tx_hash + ":%d" % output.get('prevout_n')
 629                     if key in self.spent_outputs: continue
 630                     output['prevout_hash'] = tx_hash
 631                     output['height'] = tx_height
 632                     output['coinbase'] = is_coinbase
 633                     coins.append((tx_height, output))
 634
 635         # sort by age
 636         if coins:
 637             coins = sorted(coins)
 638             if coins[-1][0] != 0:
 639                 while coins[0][0] == 0:
 640                     coins = coins[1:] + [ coins[0] ]
 641         return [x[1] for x in coins]
 642
 643
 644     def choose_tx_inputs( self, amount, fixed_fee, num_outputs, domain = None, coins = None ):
 645         """ todo: minimize tx size """
 646         total = 0
 647         fee = self.fee if fixed_fee is None else fixed_fee
 648
 649         if not coins:
 650             if domain is None:
 651                 domain = self.addresses(True)
 652             for i in self.frozen_addresses:
 653                 if i in domain: domain.remove(i)
 654             coins = self.get_unspent_coins(domain)
 655
 656         inputs = []
 657
 658         for item in coins:
 659             if item.get('coinbase') and item.get('height') + COINBASE_MATURITY > self.network.get_local_height():
 660                 continue
 661             addr = item.get('address')
 662             v = item.get('value')
 663             total += v
 664             inputs.append(item)
 665             fee = self.estimated_fee(inputs, num_outputs) if fixed_fee is None else fixed_fee
 666             if total >= amount + fee: break
 667         else:
 668             inputs = []
 669
 670         return inputs, total, fee
 671
 672
 673     def set_fee(self, fee):
 674         if self.fee != fee:
 675             self.fee = fee
 676             self.storage.put('fee_per_kb', self.fee, True)
 677
 678     def estimated_fee(self, inputs, num_outputs):
 679         estimated_size =  len(inputs) * 180 + num_outputs * 34    # this assumes non-compressed keys
 680         fee = self.fee * int(math.ceil(estimated_size/1000.))
 681         return fee
 682
 683
 684     def add_tx_change( self, inputs, outputs, amount, fee, total, change_addr=None):
 685         "add change to a transaction"
 686         change_amount = total - ( amount + fee )
 687         if change_amount > DUST_THRESHOLD:
 688             if not change_addr:
 689
 690                 # send change to one of the accounts involved in the tx
 691                 address = inputs[0].get('address')
 692                 account, _ = self.get_address_index(address)
 693
 694                 if not self.use_change or account == IMPORTED_ACCOUNT:
 695                     change_addr = inputs[-1]['address']
 696                 else:
 697                     change_addr = self.accounts[account].get_addresses(1)[-self.gap_limit_for_change]
 698
 699             # Insert the change output at a random position in the outputs
 700             posn = random.randint(0, len(outputs))
 701             outputs[posn:posn] = [( change_addr,  change_amount)]
 702         return outputs
 703
 704
 705     def get_history(self, address):
 706         with self.lock:
 707             return self.history.get(address)
 708
 709
 710     def get_status(self, h):
 711         if not h: return None
 712         if h == ['*']: return '*'
 713         status = ''
 714         for tx_hash, height in h:
 715             status += tx_hash + ':%d:' % height
 716         return hashlib.sha256( status ).digest().encode('hex')
 717
 718
 719     def receive_tx_callback(self, tx_hash, tx, tx_height):
 720
 721         with self.transaction_lock:
 722             self.add_extra_addresses(tx)
 723             if not self.check_new_tx(tx_hash, tx):
 724                 # may happen due to pruning
 725                 print_error("received transaction that is no longer referenced in history", tx_hash)
 726                 return
 727             self.transactions[tx_hash] = tx
 728             self.network.pending_transactions_for_notifications.append(tx)
 729             self.save_transactions()
 730             if self.verifier and tx_height>0:
 731                 self.verifier.add(tx_hash, tx_height)
 732             self.update_tx_outputs(tx_hash)
 733
 734
 735     def save_transactions(self):
 736         tx = {}
 737         for k,v in self.transactions.items():
 738             tx[k] = str(v)
 739         self.storage.put('transactions', tx, True)
 740
 741     def receive_history_callback(self, addr, hist):
 742
 743         if not self.check_new_history(addr, hist):
 744             raise Exception("error: received history for %s is not consistent with known transactions"%addr)
 745
 746         with self.lock:
 747             self.history[addr] = hist
 748             self.storage.put('addr_history', self.history, True)
 749
 750         if hist != ['*']:
 751             for tx_hash, tx_height in hist:
 752                 if tx_height>0:
 753                     # add it in case it was previously unconfirmed
 754                     if self.verifier: self.verifier.add(tx_hash, tx_height)
 755
 756
 757     def get_tx_history(self, account=None):
 758         if not self.verifier:
 759             return []
 760
 761         with self.transaction_lock:
 762             history = self.transactions.items()
 763             history.sort(key = lambda x: self.verifier.get_txpos(x[0]))
 764             result = []
 765
 766             balance = 0
 767             for tx_hash, tx in history:
 768                 is_relevant, is_mine, v, fee = self.get_tx_value(tx, account)
 769                 if v is not None: balance += v
 770
 771             c, u = self.get_account_balance(account)
 772
 773             if balance != c+u:
 774                 result.append( ('', 1000, 0, c+u-balance, None, c+u-balance, None ) )
 775
 776             balance = c + u - balance
 777             for tx_hash, tx in history:
 778                 is_relevant, is_mine, value, fee = self.get_tx_value(tx, account)
 779                 if not is_relevant:
 780                     continue
 781                 if value is not None:
 782                     balance += value
 783
 784                 conf, timestamp = self.verifier.get_confirmations(tx_hash) if self.verifier else (None, None)
 785                 result.append( (tx_hash, conf, is_mine, value, fee, balance, timestamp) )
 786
 787         return result
 788
 789
 790     def get_label(self, tx_hash):
 791         label = self.labels.get(tx_hash)
 792         is_default = (label == '') or (label is None)
 793         if is_default: label = self.get_default_label(tx_hash)
 794         return label, is_default
 795
 796
 797     def get_default_label(self, tx_hash):
 798         tx = self.transactions.get(tx_hash)
 799         default_label = ''
 800         if tx:
 801             is_relevant, is_mine, _, _ = self.get_tx_value(tx)
 802             if is_mine:
 803                 for o in tx.outputs:
 804                     o_addr, _ = o
 805                     if not self.is_mine(o_addr):
 806                         try:
 807                             default_label = self.labels[o_addr]
 808                         except KeyError:
 809                             default_label = '>' + o_addr
 810                         break
 811                 else:
 812                     default_label = '(internal)'
 813             else:
 814                 for o in tx.outputs:
 815                     o_addr, _ = o
 816                     if self.is_mine(o_addr) and not self.is_change(o_addr):
 817                         break
 818                 else:
 819                     for o in tx.outputs:
 820                         o_addr, _ = o
 821                         if self.is_mine(o_addr):
 822                             break
 823                     else:
 824                         o_addr = None
 825
 826                 if o_addr:
 827                     dest_label = self.labels.get(o_addr)
 828                     try:
 829                         default_label = self.labels[o_addr]
 830                     except KeyError:
 831                         default_label = '<' + o_addr
 832
 833         return default_label
 834
 835
 836     def make_unsigned_transaction(self, outputs, fee=None, change_addr=None, domain=None, coins=None ):
 837         for address, x in outputs:
 838             assert is_valid(address), "Address " + address + " is invalid!"
 839         amount = sum( map(lambda x:x[1], outputs) )
 840         inputs, total, fee = self.choose_tx_inputs( amount, fee, len(outputs), domain, coins )
 841         if not inputs:
 842             raise ValueError("Not enough funds")
 843         for txin in inputs:
 844             self.add_input_info(txin)
 845         outputs = self.add_tx_change(inputs, outputs, amount, fee, total, change_addr)
 846         return Transaction.from_io(inputs, outputs)
 847
 848
 849     def mktx(self, outputs, password, fee=None, change_addr=None, domain= None, coins = None ):
 850         tx = self.make_unsigned_transaction(outputs, fee, change_addr, domain, coins)
 851         keypairs = {}
 852         self.add_keypairs(tx, keypairs, password)
 853         if keypairs:
 854             self.sign_transaction(tx, keypairs, password)
 855         return tx
 856
 857
 858     def add_input_info(self, txin):
 859         address = txin['address']
 860         account_id, sequence = self.get_address_index(address)
 861         account = self.accounts[account_id]
 862         redeemScript = account.redeem_script(sequence)
 863         txin['x_pubkeys'] = account.get_xpubkeys(sequence)
 864         txin['pubkeys'] = pubkeys = account.get_pubkeys(sequence)
 865         txin['signatures'] = [None] * len(pubkeys)
 866
 867         if redeemScript:
 868             txin['redeemScript'] = redeemScript
 869             txin['num_sig'] = 2
 870         else:
 871             txin['redeemPubkey'] = account.get_pubkey(*sequence)
 872             txin['num_sig'] = 1
 873
 874
 875     def sign_transaction(self, tx, keypairs, password):
 876         tx.sign(keypairs)
 877         run_hook('sign_transaction', tx, password)
 878
 879
 880     def sendtx(self, tx):
 881         # synchronous
 882         h = self.send_tx(tx)
 883         self.tx_event.wait()
 884         return self.receive_tx(h, tx)
 885
 886     def send_tx(self, tx):
 887         # asynchronous
 888         self.tx_event.clear()
 889         self.network.send([('blockchain.transaction.broadcast', [str(tx)])], self.on_broadcast)
 890         return tx.hash()
 891
 892     def on_broadcast(self, i, r):
 893         self.tx_result = r.get('result')
 894         self.tx_event.set()
 895
 896     def receive_tx(self, tx_hash, tx):
 897         out = self.tx_result
 898         if out != tx_hash:
 899             return False, "error: " + out
 900         run_hook('receive_tx', tx, self)
 901         return True, out
 902
 903
 904     def update_password(self, old_password, new_password):
 905         if new_password == '':
 906             new_password = None
 907
 908         if self.has_seed():
 909             decoded = self.get_seed(old_password)
 910             self.seed = pw_encode( decoded, new_password)
 911             self.storage.put('seed', self.seed, True)
 912
 913         imported_account = self.accounts.get(IMPORTED_ACCOUNT)
 914         if imported_account:
 915             imported_account.update_password(old_password, new_password)
 916             self.save_accounts()
 917
 918         for k, v in self.master_private_keys.items():
 919             b = pw_decode(v, old_password)
 920             c = pw_encode(b, new_password)
 921             self.master_private_keys[k] = c
 922         self.storage.put('master_private_keys', self.master_private_keys, True)
 923
 924         self.use_encryption = (new_password != None)
 925         self.storage.put('use_encryption', self.use_encryption,True)
 926
 927
 928     def freeze(self,addr):
 929         if self.is_mine(addr) and addr not in self.frozen_addresses:
 930             self.frozen_addresses.append(addr)
 931             self.storage.put('frozen_addresses', self.frozen_addresses, True)
 932             return True
 933         else:
 934             return False
 935
 936
 937     def unfreeze(self,addr):
 938         if self.is_mine(addr) and addr in self.frozen_addresses:
 939             self.frozen_addresses.remove(addr)
 940             self.storage.put('frozen_addresses', self.frozen_addresses, True)
 941             return True
 942         else:
 943             return False
 944
 945
 946     def set_verifier(self, verifier):
 947         self.verifier = verifier
 948
 949         # review transactions that are in the history
 950         for addr, hist in self.history.items():
 951             if hist == ['*']: continue
 952             for tx_hash, tx_height in hist:
 953                 if tx_height>0:
 954                     # add it in case it was previously unconfirmed
 955                     self.verifier.add(tx_hash, tx_height)
 956
 957         # if we are on a pruning server, remove unverified transactions
 958         vr = self.verifier.transactions.keys() + self.verifier.verified_tx.keys()
 959         for tx_hash in self.transactions.keys():
 960             if tx_hash not in vr:
 961                 self.transactions.pop(tx_hash)
 962
 963
 964     def check_new_history(self, addr, hist):
 965
 966         # check that all tx in hist are relevant
 967         if hist != ['*']:
 968             for tx_hash, height in hist:
 969                 tx = self.transactions.get(tx_hash)
 970                 if not tx: continue
 971                 if not tx.has_address(addr):
 972                     return False
 973
 974         # check that we are not "orphaning" a transaction
 975         old_hist = self.history.get(addr,[])
 976         if old_hist == ['*']: return True
 977
 978         for tx_hash, height in old_hist:
 979             if tx_hash in map(lambda x:x[0], hist): continue
 980             found = False
 981             for _addr, _hist in self.history.items():
 982                 if _addr == addr: continue
 983                 if _hist == ['*']: continue
 984                 _tx_hist = map(lambda x:x[0], _hist)
 985                 if tx_hash in _tx_hist:
 986                     found = True
 987                     break
 988
 989             if not found:
 990                 tx = self.transactions.get(tx_hash)
 991                 # tx might not be there
 992                 if not tx: continue
 993
 994                 # already verified?
 995                 if self.verifier.get_height(tx_hash):
 996                     continue
 997                 # unconfirmed tx
 998                 print_error("new history is orphaning transaction:", tx_hash)
 999                 # check that all outputs are not mine, request histories
1000                 ext_requests = []
1001                 for _addr, _v in tx.outputs:
1002                     # assert not self.is_mine(_addr)
1003                     ext_requests.append( ('blockchain.address.get_history', [_addr]) )
1004
1005                 ext_h = self.network.synchronous_get(ext_requests)
1006                 print_error("sync:", ext_requests, ext_h)
1007                 height = None
1008                 for h in ext_h:
1009                     if h == ['*']: continue
1010                     for item in h:
1011                         if item.get('tx_hash') == tx_hash:
1012                             height = item.get('height')
1013                 if height:
1014                     print_error("found height for", tx_hash, height)
1015                     self.verifier.add(tx_hash, height)
1016                 else:
1017                     print_error("removing orphaned tx from history", tx_hash)
1018                     self.transactions.pop(tx_hash)
1019
1020         return True
1021
1022
1023     def check_new_tx(self, tx_hash, tx):
1024         # 1 check that tx is referenced in addr_history.
1025         addresses = []
1026         for addr, hist in self.history.items():
1027             if hist == ['*']:continue
1028             for txh, height in hist:
1029                 if txh == tx_hash:
1030                     addresses.append(addr)
1031
1032         if not addresses:
1033             return False
1034
1035         # 2 check that referencing addresses are in the tx
1036         for addr in addresses:
1037             if not tx.has_address(addr):
1038                 return False
1039
1040         return True
1041
1042
1043     def start_threads(self, network):
1044         from verifier import TxVerifier
1045         self.network = network
1046         if self.network is not None:
1047             self.verifier = TxVerifier(self.network, self.storage)
1048             self.verifier.start()
1049             self.set_verifier(self.verifier)
1050             self.synchronizer = WalletSynchronizer(self, network)
1051             self.synchronizer.start()
1052         else:
1053             self.verifier = None
1054             self.synchronizer =None
1055
1056     def stop_threads(self):
1057         if self.network:
1058             self.verifier.stop()
1059             self.synchronizer.stop()
1060
1061     def restore(self, cb):
1062         pass
1063
1064     def get_accounts(self):
1065         return self.accounts
1066
1067     def save_accounts(self):
1068         d = {}
1069         for k, v in self.accounts.items():
1070             d[k] = v.dump()
1071         self.storage.put('accounts', d, True)
1072
1073     def can_import(self):
1074         return not self.is_watching_only()
1075
1076     def is_used(self, address):
1077         h = self.history.get(address,[])
1078         c, u = self.get_addr_balance(address)
1079         return len(h), len(h) > 0 and c == -u
1080
1081
1082 class Imported_Wallet(Abstract_Wallet):
1083
1084     def __init__(self, storage):
1085         Abstract_Wallet.__init__(self, storage)
1086         a = self.accounts.get(IMPORTED_ACCOUNT)
1087         if not a:
1088             self.accounts[IMPORTED_ACCOUNT] = ImportedAccount({'imported':{}})
1089         self.storage.put('wallet_type', 'imported', True)
1090
1091
1092     def is_watching_only(self):
1093         acc = self.accounts[IMPORTED_ACCOUNT]
1094         n = acc.keypairs.values()
1095         return n == [(None, None)] * len(n)
1096
1097     def has_seed(self):
1098         return False
1099
1100     def is_deterministic(self):
1101         return False
1102
1103     def check_password(self, password):
1104         self.accounts[IMPORTED_ACCOUNT].get_private_key((0,0), self, password)
1105
1106     def is_used(self, address):
1107         h = self.history.get(address,[])
1108         return len(h), False
1109
1110
1111 class Deterministic_Wallet(Abstract_Wallet):
1112
1113     def __init__(self, storage):
1114         Abstract_Wallet.__init__(self, storage)
1115
1116     def has_seed(self):
1117         return self.seed != ''
1118
1119     def is_deterministic(self):
1120         return True
1121
1122     def is_watching_only(self):
1123         return not self.has_seed()
1124
1125     def add_seed(self, seed, password):
1126         if self.seed:
1127             raise Exception("a seed exists")
1128
1129         self.seed_version, self.seed = self.prepare_seed(seed)
1130         if password:
1131             self.seed = pw_encode( self.seed, password)
1132             self.use_encryption = True
1133         else:
1134             self.use_encryption = False
1135
1136         self.storage.put('seed', self.seed, True)
1137         self.storage.put('seed_version', self.seed_version, True)
1138         self.storage.put('use_encryption', self.use_encryption,True)
1139         self.create_master_keys(password)
1140
1141     def get_seed(self, password):
1142         return pw_decode(self.seed, password)
1143
1144     def get_mnemonic(self, password):
1145         return self.get_seed(password)
1146
1147     def change_gap_limit(self, value):
1148         if value >= self.gap_limit:
1149             self.gap_limit = value
1150             self.storage.put('gap_limit', self.gap_limit, True)
1151             #self.interface.poke('synchronizer')
1152             return True
1153
1154         elif value >= self.min_acceptable_gap():
1155             for key, account in self.accounts.items():
1156                 addresses = account[0]
1157                 k = self.num_unused_trailing_addresses(addresses)
1158                 n = len(addresses) - k + value
1159                 addresses = addresses[0:n]
1160                 self.accounts[key][0] = addresses
1161
1162             self.gap_limit = value
1163             self.storage.put('gap_limit', self.gap_limit, True)
1164             self.save_accounts()
1165             return True
1166         else:
1167             return False
1168
1169     def num_unused_trailing_addresses(self, addresses):
1170         k = 0
1171         for a in addresses[::-1]:
1172             if self.history.get(a):break
1173             k = k + 1
1174         return k
1175
1176     def min_acceptable_gap(self):
1177         # fixme: this assumes wallet is synchronized
1178         n = 0
1179         nmax = 0
1180
1181         for account in self.accounts.values():
1182             addresses = account.get_addresses(0)
1183             k = self.num_unused_trailing_addresses(addresses)
1184             for a in addresses[0:-k]:
1185                 if self.history.get(a):
1186                     n = 0
1187                 else:
1188                     n += 1
1189                     if n > nmax: nmax = n
1190         return nmax + 1
1191
1192
1193     def address_is_old(self, address):
1194         age = -1
1195         h = self.history.get(address, [])
1196         if h == ['*']:
1197             return True
1198         for tx_hash, tx_height in h:
1199             if tx_height == 0:
1200                 tx_age = 0
1201             else:
1202                 tx_age = self.network.get_local_height() - tx_height + 1
1203             if tx_age > age:
1204                 age = tx_age
1205         return age > 2
1206
1207
1208     def synchronize_sequence(self, account, for_change):
1209         limit = self.gap_limit_for_change if for_change else self.gap_limit
1210         new_addresses = []
1211         while True:
1212             addresses = account.get_addresses(for_change)
1213             if len(addresses) < limit:
1214                 address = account.create_new_address(for_change)
1215                 self.history[address] = []
1216                 new_addresses.append( address )
1217                 continue
1218
1219             if map( lambda a: self.address_is_old(a), addresses[-limit:] ) == limit*[False]:
1220                 break
1221             else:
1222                 address = account.create_new_address(for_change)
1223                 self.history[address] = []
1224                 new_addresses.append( address )
1225
1226         return new_addresses
1227
1228
1229     def check_pending_accounts(self):
1230         for account_id, addr in self.next_addresses.items():
1231             if self.address_is_old(addr):
1232                 print_error( "creating account", account_id )
1233                 xpub = self.master_public_keys[account_id]
1234                 account = BIP32_Account({'xpub':xpub})
1235                 self.add_account(account_id, account)
1236                 self.next_addresses.pop(account_id)
1237
1238
1239     def synchronize_account(self, account):
1240         new = []
1241         new += self.synchronize_sequence(account, 0)
1242         new += self.synchronize_sequence(account, 1)
1243         return new
1244
1245
1246     def synchronize(self):
1247         self.check_pending_accounts()
1248         new = []
1249         for account in self.accounts.values():
1250             if type(account) in [ImportedAccount, PendingAccount]:
1251                 continue
1252             new += self.synchronize_account(account)
1253         if new:
1254             self.save_accounts()
1255             self.storage.put('addr_history', self.history, True)
1256         return new
1257
1258
1259     def restore(self, callback):
1260         from i18n import _
1261         def wait_for_wallet():
1262             self.set_up_to_date(False)
1263             while not self.is_up_to_date():
1264                 msg = "%s\n%s %d\n%s %.1f"%(
1265                     _("Please wait..."),
1266                     _("Addresses generated:"),
1267                     len(self.addresses(True)),
1268                     _("Kilobytes received:"),
1269                     self.network.interface.bytes_received/1024.)
1270
1271                 apply(callback, (msg,))
1272                 time.sleep(0.1)
1273
1274         def wait_for_network():
1275             while not self.network.is_connected():
1276                 msg = "%s \n" % (_("Connecting..."))
1277                 apply(callback, (msg,))
1278                 time.sleep(0.1)
1279
1280         # wait until we are connected, because the user might have selected another server
1281         if self.network:
1282             wait_for_network()
1283             wait_for_wallet()
1284         else:
1285             self.synchronize()
1286
1287         self.fill_addressbook()
1288
1289
1290     def create_account(self, name, password):
1291         i = self.num_accounts()
1292         account_id = self.account_id(i)
1293         account = self.make_account(account_id, password)
1294         self.add_account(account_id, account)
1295         if name:
1296             self.set_label(account_id, name)
1297
1298         # add address of the next account
1299         _, _ = self.next_account_address(password)
1300
1301
1302     def add_account(self, account_id, account):
1303         self.accounts[account_id] = account
1304         self.save_accounts()
1305
1306
1307
1308     def account_is_pending(self, k):
1309         return type(self.accounts.get(k)) == PendingAccount
1310
1311     def delete_pending_account(self, k):
1312         assert self.account_is_pending(k)
1313         self.accounts.pop(k)
1314         self.save_accounts()
1315
1316     def create_pending_account(self, name, password):
1317         account_id, addr = self.next_account_address(password)
1318         self.set_label(account_id, name)
1319         self.accounts[account_id] = PendingAccount({'pending':addr})
1320         self.save_accounts()
1321
1322
1323
1324
1325 class NewWallet(Deterministic_Wallet):
1326
1327     def __init__(self, storage):
1328         Deterministic_Wallet.__init__(self, storage)
1329
1330     def can_create_accounts(self):
1331         return not self.is_watching_only()
1332
1333     def get_master_public_key(self):
1334         return self.master_public_keys["m/"]
1335
1336     def get_master_public_keys(self):
1337         out = {}
1338         for k, account in self.accounts.items():
1339             name = self.get_account_name(k)
1340             mpk_text = '\n\n'.join( account.get_master_pubkeys() )
1341             out[name] = mpk_text
1342         return out
1343
1344     def get_master_private_key(self, account, password):
1345         k = self.master_private_keys.get(account)
1346         if not k: return
1347         xpriv = pw_decode( k, password)
1348         return xpriv
1349
1350     def check_password(self, password):
1351         xpriv = self.get_master_private_key( "m/", password )
1352         xpub = self.master_public_keys["m/"]
1353         assert deserialize_xkey(xpriv)[3] == deserialize_xkey(xpub)[3]
1354
1355     def create_watching_only_wallet(self, xpub):
1356         self.storage.put('seed_version', self.seed_version, True)
1357         self.add_master_public_key("m/", xpub)
1358         account = BIP32_Account({'xpub':xpub})
1359         self.add_account("m/", account)
1360
1361
1362     def create_accounts(self, password):
1363         seed = pw_decode(self.seed, password)
1364         self.create_account('Main account', password)
1365
1366
1367     def add_master_public_key(self, name, mpk):
1368         self.master_public_keys[name] = mpk
1369         self.storage.put('master_public_keys', self.master_public_keys, True)
1370
1371
1372     def add_master_private_key(self, name, xpriv, password):
1373         self.master_private_keys[name] = pw_encode(xpriv, password)
1374         self.storage.put('master_private_keys', self.master_private_keys, True)
1375
1376
1377     def add_master_keys(self, root, account_id, password):
1378         x = self.master_private_keys.get(root)
1379         if x:
1380             master_xpriv = pw_decode(x, password )
1381             xpriv, xpub = bip32_private_derivation(master_xpriv, root, account_id)
1382             self.add_master_public_key(account_id, xpub)
1383             self.add_master_private_key(account_id, xpriv, password)
1384         else:
1385             master_xpub = self.master_public_keys[root]
1386             xpub = bip32_public_derivation(master_xpub, root, account_id)
1387             self.add_master_public_key(account_id, xpub)
1388         return xpub
1389
1390
1391     def create_master_keys(self, password):
1392         xpriv, xpub = bip32_root(mnemonic_to_seed(self.get_seed(password),'').encode('hex'))
1393         self.add_master_public_key("m/", xpub)
1394         self.add_master_private_key("m/", xpriv, password)
1395
1396
1397     def find_root_by_master_key(self, xpub):
1398         for key, xpub2 in self.master_public_keys.items():
1399             if key == "m/":continue
1400             if xpub == xpub2:
1401                 return key
1402
1403
1404     def num_accounts(self):
1405         keys = []
1406         for k, v in self.accounts.items():
1407             if type(v) != BIP32_Account:
1408                 continue
1409             keys.append(k)
1410
1411         i = 0
1412         while True:
1413             account_id = self.account_id(i)
1414             if account_id not in keys: break
1415             i += 1
1416         return i
1417
1418
1419     def next_account_address(self, password):
1420         i = self.num_accounts()
1421         account_id = self.account_id(i)
1422
1423         addr = self.next_addresses.get(account_id)
1424         if not addr:
1425             account = self.make_account(account_id, password)
1426             addr = account.first_address()
1427             self.next_addresses[account_id] = addr
1428             self.storage.put('next_addresses', self.next_addresses)
1429
1430         return account_id, addr
1431
1432     def account_id(self, i):
1433         return "m/%d'"%i
1434
1435     def make_account(self, account_id, password):
1436         """Creates and saves the master keys, but does not save the account"""
1437         xpub = self.add_master_keys("m/", account_id, password)
1438         account = BIP32_Account({'xpub':xpub})
1439         return account
1440
1441
1442     def make_seed(self):
1443         import mnemonic, ecdsa
1444         entropy = ecdsa.util.randrange( pow(2,160) )
1445         nonce = 0
1446         while True:
1447             ss = "%040x"%(entropy+nonce)
1448             s = hashlib.sha256(ss.decode('hex')).digest().encode('hex')
1449             # we keep only 13 words, that's approximately 139 bits of entropy
1450             words = mnemonic.mn_encode(s)[0:13]
1451             seed = ' '.join(words)
1452             if is_new_seed(seed):
1453                 break  # this will remove 8 bits of entropy
1454             nonce += 1
1455         return seed
1456
1457     def prepare_seed(self, seed):
1458         import unicodedata
1459         return NEW_SEED_VERSION, unicodedata.normalize('NFC', unicode(seed.strip()))
1460
1461
1462
1463 class Wallet_2of2(NewWallet):
1464
1465     def __init__(self, storage):
1466         NewWallet.__init__(self, storage)
1467         self.storage.put('wallet_type', '2of2', True)
1468
1469     def can_create_accounts(self):
1470         return False
1471
1472     def can_import(self):
1473         return False
1474
1475     def create_account(self):
1476         xpub1 = self.master_public_keys.get("m/")
1477         xpub2 = self.master_public_keys.get("cold/")
1478         account = BIP32_Account_2of2({'xpub':xpub1, 'xpub2':xpub2})
1479         self.add_account('m/', account)
1480
1481     def get_master_public_keys(self):
1482         xpub1 = self.master_public_keys.get("m/")
1483         xpub2 = self.master_public_keys.get("cold/")
1484         return {'hot':xpub1, 'cold':xpub2}
1485
1486     def get_action(self):
1487         xpub1 = self.master_public_keys.get("m/")
1488         xpub2 = self.master_public_keys.get("cold/")
1489         if xpub1 is None:
1490             return 'create_2of2_1'
1491         if xpub2 is None:
1492             return 'create_2of2_2'
1493
1494
1495
1496 class Wallet_2of3(Wallet_2of2):
1497
1498     def __init__(self, storage):
1499         Wallet_2of2.__init__(self, storage)
1500         self.storage.put('wallet_type', '2of3', True)
1501
1502     def create_account(self):
1503         xpub1 = self.master_public_keys.get("m/")
1504         xpub2 = self.master_public_keys.get("cold/")
1505         xpub3 = self.master_public_keys.get("remote/")
1506         account = BIP32_Account_2of3({'xpub':xpub1, 'xpub2':xpub2, 'xpub3':xpub3})
1507         self.add_account('m/', account)
1508
1509     def get_master_public_keys(self):
1510         xpub1 = self.master_public_keys.get("m/")
1511         xpub2 = self.master_public_keys.get("cold/")
1512         xpub3 = self.master_public_keys.get("remote/")
1513         return {'hot':xpub1, 'cold':xpub2, 'remote':xpub3}
1514
1515     def get_action(self):
1516         xpub1 = self.master_public_keys.get("m/")
1517         xpub2 = self.master_public_keys.get("cold/")
1518         xpub3 = self.master_public_keys.get("remote/")
1519         # fixme: we use order of creation
1520         if xpub2 and xpub1 is None:
1521             return 'create_2fa_2'
1522         if xpub1 is None:
1523             return 'create_2of3_1'
1524         if xpub2 is None or xpub3 is None:
1525             return 'create_2of3_2'
1526
1527
1528
1529
1530
1531 class OldWallet(Deterministic_Wallet):
1532
1533     def make_seed(self):
1534         import mnemonic
1535         seed = random_seed(128)
1536         return ' '.join(mnemonic.mn_encode(seed))
1537
1538     def prepare_seed(self, seed):
1539         import mnemonic
1540         # see if seed was entered as hex
1541         seed = seed.strip()
1542         try:
1543             assert seed
1544             seed.decode('hex')
1545             return OLD_SEED_VERSION, str(seed)
1546         except Exception:
1547             pass
1548
1549         words = seed.split()
1550         seed = mnemonic.mn_decode(words)
1551         if not seed:
1552             raise Exception("Invalid seed")
1553
1554         return OLD_SEED_VERSION, seed
1555
1556
1557     def create_master_keys(self, password):
1558         seed = self.get_seed(password)
1559         mpk = OldAccount.mpk_from_seed(seed)
1560         self.storage.put('master_public_key', mpk, True)
1561
1562     def get_master_public_key(self):
1563         return self.storage.get("master_public_key")
1564
1565     def get_master_public_keys(self):
1566         return {'Main Account':self.get_master_public_key()}
1567
1568     def create_accounts(self, password):
1569         mpk = self.storage.get("master_public_key")
1570         self.create_account(mpk)
1571
1572     def create_account(self, mpk):
1573         self.accounts[0] = OldAccount({'mpk':mpk, 0:[], 1:[]})
1574         self.save_accounts()
1575
1576     def create_watching_only_wallet(self, mpk):
1577         self.seed_version = OLD_SEED_VERSION
1578         self.storage.put('seed_version', self.seed_version, True)
1579         self.storage.put('master_public_key', mpk, True)
1580         self.create_account(mpk)
1581
1582     def get_seed(self, password):
1583         seed = pw_decode(self.seed, password).encode('utf8')
1584         return seed
1585
1586     def check_password(self, password):
1587         seed = self.get_seed(password)
1588         self.accounts[0].check_seed(seed)
1589
1590     def get_mnemonic(self, password):
1591         import mnemonic
1592         s = self.get_seed(password)
1593         return ' '.join(mnemonic.mn_encode(s))
1594
1595     def check_pending_accounts(self):
1596         pass
1597
1598
1599 # former WalletFactory
1600 class Wallet(object):
1601
1602     def __new__(self, storage):
1603         config = storage.config
1604         if config.get('bitkey', False):
1605             # if user requested support for Bitkey device,
1606             # import Bitkey driver
1607             from wallet_bitkey import WalletBitkey
1608             return WalletBitkey(config)
1609
1610         if storage.get('wallet_type') == '2of2':
1611             return Wallet_2of2(storage)
1612
1613         if storage.get('wallet_type') == '2of3':
1614             return Wallet_2of3(storage)
1615
1616         if storage.get('wallet_type') == 'imported':
1617             return Imported_Wallet(storage)
1618
1619
1620         if not storage.file_exists:
1621             seed_version = NEW_SEED_VERSION if config.get('bip32') is True else OLD_SEED_VERSION
1622         else:
1623             seed_version = storage.get('seed_version')
1624             if not seed_version:
1625                 seed_version = OLD_SEED_VERSION if len(storage.get('master_public_key')) == 128 else NEW_SEED_VERSION
1626
1627         if seed_version == OLD_SEED_VERSION:
1628             return OldWallet(storage)
1629         elif seed_version == NEW_SEED_VERSION:
1630             return NewWallet(storage)
1631         else:
1632             msg = "This wallet seed is not supported."
1633             if seed_version in [5]:
1634                 msg += "\nTo open this wallet, try 'git checkout seed_v%d'"%seed_version
1635             print msg
1636             sys.exit(1)
1637
1638
1639
1640     @classmethod
1641     def is_seed(self, seed):
1642         if not seed:
1643             return False
1644         elif is_old_seed(seed):
1645             return True
1646         elif is_new_seed(seed):
1647             return True
1648         else:
1649             return False
1650
1651     @classmethod
1652     def is_mpk(self, mpk):
1653         try:
1654             int(mpk, 16)
1655             old = True
1656         except:
1657             old = False
1658
1659         if old:
1660             return len(mpk) == 128
1661         else:
1662             try:
1663                 deserialize_xkey(mpk)
1664                 return True
1665             except:
1666                 return False
1667
1668     @classmethod
1669     def is_address(self, text):
1670         if not text:
1671             return False
1672         for x in text.split():
1673             if not bitcoin.is_address(x):
1674                 return False
1675         return True
1676
1677     @classmethod
1678     def is_private_key(self, text):
1679         if not text:
1680             return False
1681         for x in text.split():
1682             if not bitcoin.is_private_key(x):
1683                 return False
1684         return True
1685
1686     @classmethod
1687     def from_seed(self, seed, storage):
1688         if is_old_seed(seed):
1689             klass = OldWallet
1690         elif is_new_seed(seed):
1691             klass = NewWallet
1692         w = klass(storage)
1693         return w
1694
1695     @classmethod
1696     def from_address(self, text, storage):
1697         w = Imported_Wallet(storage)
1698         for x in text.split():
1699             w.accounts[IMPORTED_ACCOUNT].add(x, None, None, None)
1700         w.save_accounts()
1701         return w
1702
1703     @classmethod
1704     def from_private_key(self, text, storage):
1705         w = Imported_Wallet(storage)
1706         for x in text.split():
1707             w.import_key(x, None)
1708         return w
1709
1710     @classmethod
1711     def from_mpk(self, mpk, storage):
1712
1713         try:
1714             int(mpk, 16)
1715             old = True
1716         except:
1717             old = False
1718
1719         if old:
1720             w = OldWallet(storage)
1721             w.seed = ''
1722             w.create_watching_only_wallet(mpk)
1723         else:
1724             w = NewWallet(storage)
1725             w.create_watching_only_wallet(mpk)
1726
1727         return w