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