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