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 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] = [( 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 address, x in outputs:
 776             if address.startswith('OP_RETURN:'):
 777                 continue
 778             assert is_address(address), "Address " + address + " is invalid!"
 779         amount = sum( map(lambda x:x[1], outputs) )
 780         inputs, total, fee = self.choose_tx_inputs( amount, fee, len(outputs), domain, coins )
 781         if not inputs:
 782             raise ValueError("Not enough funds")
 783         for txin in inputs:
 784             self.add_input_info(txin)
 785         outputs = self.add_tx_change(inputs, outputs, amount, fee, total, change_addr)
 786         return Transaction(inputs, outputs)
 787
 788     def mktx(self, outputs, password, fee=None, change_addr=None, domain= None, coins = None ):
 789         tx = self.make_unsigned_transaction(outputs, fee, change_addr, domain, coins)
 790         keypairs = {}
 791         self.add_keypairs(tx, keypairs, password)
 792         if keypairs:
 793             self.sign_transaction(tx, keypairs, password)
 794         return tx
 795
 796     def add_input_info(self, txin):
 797         address = txin['address']
 798         account_id, sequence = self.get_address_index(address)
 799         account = self.accounts[account_id]
 800         redeemScript = account.redeem_script(*sequence)
 801         pubkeys = account.get_pubkeys(*sequence)
 802         x_pubkeys = account.get_xpubkeys(*sequence)
 803         # sort pubkeys and x_pubkeys, using the order of pubkeys
 804         pubkeys, x_pubkeys = zip( *sorted(zip(pubkeys, x_pubkeys)))
 805         txin['pubkeys'] = list(pubkeys)
 806         txin['x_pubkeys'] = list(x_pubkeys)
 807         txin['signatures'] = [None] * len(pubkeys)
 808
 809         if redeemScript:
 810             txin['redeemScript'] = redeemScript
 811             txin['num_sig'] = 2
 812         else:
 813             txin['redeemPubkey'] = account.get_pubkey(*sequence)
 814             txin['num_sig'] = 1
 815
 816     def sign_transaction(self, tx, keypairs, password):
 817         tx.sign(keypairs)
 818         run_hook('sign_transaction', tx, password)
 819
 820     def sendtx(self, tx):
 821         # synchronous
 822         h = self.send_tx(tx)
 823         self.tx_event.wait()
 824         return self.receive_tx(h, tx)
 825
 826     def send_tx(self, tx):
 827         # asynchronous
 828         self.tx_event.clear()
 829         self.network.send([('blockchain.transaction.broadcast', [str(tx)])], self.on_broadcast)
 830         return tx.hash()
 831
 832     def on_broadcast(self, i, r):
 833         self.tx_result = r.get('result')
 834         self.tx_event.set()
 835
 836     def receive_tx(self, tx_hash, tx):
 837         out = self.tx_result
 838         if out != tx_hash:
 839             return False, "error: " + out
 840         run_hook('receive_tx', tx, self)
 841         return True, out
 842
 843     def update_password(self, old_password, new_password):
 844         if new_password == '':
 845             new_password = None
 846
 847         if self.has_seed():
 848             decoded = self.get_seed(old_password)
 849             self.seed = pw_encode( decoded, new_password)
 850             self.storage.put('seed', self.seed, True)
 851
 852         imported_account = self.accounts.get(IMPORTED_ACCOUNT)
 853         if imported_account:
 854             imported_account.update_password(old_password, new_password)
 855             self.save_accounts()
 856
 857         for k, v in self.master_private_keys.items():
 858             b = pw_decode(v, old_password)
 859             c = pw_encode(b, new_password)
 860             self.master_private_keys[k] = c
 861         self.storage.put('master_private_keys', self.master_private_keys, True)
 862
 863         self.use_encryption = (new_password != None)
 864         self.storage.put('use_encryption', self.use_encryption,True)
 865
 866     def freeze(self,addr):
 867         if self.is_mine(addr) and addr not in self.frozen_addresses:
 868             self.frozen_addresses.append(addr)
 869             self.storage.put('frozen_addresses', self.frozen_addresses, True)
 870             return True
 871         else:
 872             return False
 873
 874     def unfreeze(self,addr):
 875         if self.is_mine(addr) and addr in self.frozen_addresses:
 876             self.frozen_addresses.remove(addr)
 877             self.storage.put('frozen_addresses', self.frozen_addresses, True)
 878             return True
 879         else:
 880             return False
 881
 882     def set_verifier(self, verifier):
 883         self.verifier = verifier
 884
 885         # review transactions that are in the history
 886         for addr, hist in self.history.items():
 887             if hist == ['*']: continue
 888             for tx_hash, tx_height in hist:
 889                 if tx_height>0:
 890                     # add it in case it was previously unconfirmed
 891                     self.verifier.add(tx_hash, tx_height)
 892
 893         # if we are on a pruning server, remove unverified transactions
 894         vr = self.verifier.transactions.keys() + self.verifier.verified_tx.keys()
 895         for tx_hash in self.transactions.keys():
 896             if tx_hash not in vr:
 897                 self.transactions.pop(tx_hash)
 898
 899     def check_new_history(self, addr, hist):
 900         # check that all tx in hist are relevant
 901         if hist != ['*']:
 902             for tx_hash, height in hist:
 903                 tx = self.transactions.get(tx_hash)
 904                 if not tx: continue
 905                 if not tx.has_address(addr):
 906                     return False
 907
 908         # check that we are not "orphaning" a transaction
 909         old_hist = self.history.get(addr,[])
 910         if old_hist == ['*']: return True
 911
 912         for tx_hash, height in old_hist:
 913             if tx_hash in map(lambda x:x[0], hist): continue
 914             found = False
 915             for _addr, _hist in self.history.items():
 916                 if _addr == addr: continue
 917                 if _hist == ['*']: continue
 918                 _tx_hist = map(lambda x:x[0], _hist)
 919                 if tx_hash in _tx_hist:
 920                     found = True
 921                     break
 922
 923             if not found:
 924                 tx = self.transactions.get(tx_hash)
 925                 # tx might not be there
 926                 if not tx: continue
 927
 928                 # already verified?
 929                 if self.verifier.get_height(tx_hash):
 930                     continue
 931                 # unconfirmed tx
 932                 print_error("new history is orphaning transaction:", tx_hash)
 933                 # check that all outputs are not mine, request histories
 934                 ext_requests = []
 935                 for _addr in tx.get_output_addresses():
 936                     # assert not self.is_mine(_addr)
 937                     ext_requests.append( ('blockchain.address.get_history', [_addr]) )
 938
 939                 ext_h = self.network.synchronous_get(ext_requests)
 940                 print_error("sync:", ext_requests, ext_h)
 941                 height = None
 942                 for h in ext_h:
 943                     if h == ['*']: continue
 944                     for item in h:
 945                         if item.get('tx_hash') == tx_hash:
 946                             height = item.get('height')
 947                 if height:
 948                     print_error("found height for", tx_hash, height)
 949                     self.verifier.add(tx_hash, height)
 950                 else:
 951                     print_error("removing orphaned tx from history", tx_hash)
 952                     self.transactions.pop(tx_hash)
 953
 954         return True
 955
 956     def check_new_tx(self, tx_hash, tx):
 957         # 1 check that tx is referenced in addr_history.
 958         addresses = []
 959         for addr, hist in self.history.items():
 960             if hist == ['*']:continue
 961             for txh, height in hist:
 962                 if txh == tx_hash:
 963                     addresses.append(addr)
 964
 965         if not addresses:
 966             return False
 967
 968         # 2 check that referencing addresses are in the tx
 969         for addr in addresses:
 970             if not tx.has_address(addr):
 971                 return False
 972
 973         return True
 974
 975     def start_threads(self, network):
 976         from verifier import TxVerifier
 977         self.network = network
 978         if self.network is not None:
 979             self.verifier = TxVerifier(self.network, self.storage)
 980             self.verifier.start()
 981             self.set_verifier(self.verifier)
 982             self.synchronizer = WalletSynchronizer(self, network)
 983             self.synchronizer.start()
 984         else:
 985             self.verifier = None
 986             self.synchronizer =None
 987
 988     def stop_threads(self):
 989         if self.network:
 990             self.verifier.stop()
 991             self.synchronizer.stop()
 992
 993     def restore(self, cb):
 994         pass
 995
 996     def get_accounts(self):
 997         return self.accounts
 998
 999     def save_accounts(self):
1000         d = {}
1001         for k, v in self.accounts.items():
1002             d[k] = v.dump()
1003         self.storage.put('accounts', d, True)
1004
1005     def can_import(self):
1006         return not self.is_watching_only()
1007
1008     def is_used(self, address):
1009         h = self.history.get(address,[])
1010         c, u = self.get_addr_balance(address)
1011         return len(h), len(h) > 0 and c == -u
1012
1013     def address_is_old(self, address, age_limit=2):
1014         age = -1
1015         h = self.history.get(address, [])
1016         if h == ['*']:
1017             return True
1018         for tx_hash, tx_height in h:
1019             if tx_height == 0:
1020                 tx_age = 0
1021             else:
1022                 tx_age = self.network.get_local_height() - tx_height + 1
1023             if tx_age > age:
1024                 age = tx_age
1025         return age > age_limit
1026
1027
1028 class Imported_Wallet(Abstract_Wallet):
1029
1030     def __init__(self, storage):
1031         Abstract_Wallet.__init__(self, storage)
1032         a = self.accounts.get(IMPORTED_ACCOUNT)
1033         if not a:
1034             self.accounts[IMPORTED_ACCOUNT] = ImportedAccount({'imported':{}})
1035         self.storage.put('wallet_type', 'imported', True)
1036
1037     def is_watching_only(self):
1038         acc = self.accounts[IMPORTED_ACCOUNT]
1039         n = acc.keypairs.values()
1040         return n == [(None, None)] * len(n)
1041
1042     def has_seed(self):
1043         return False
1044
1045     def is_deterministic(self):
1046         return False
1047
1048     def check_password(self, password):
1049         self.accounts[IMPORTED_ACCOUNT].get_private_key((0,0), self, password)
1050
1051     def is_used(self, address):
1052         h = self.history.get(address,[])
1053         return len(h), False
1054
1055     def get_master_public_keys(self):
1056         return {}
1057
1058     def is_beyond_limit(self, address, account, is_change):
1059         return False
1060
1061 class Deterministic_Wallet(Abstract_Wallet):
1062
1063     def __init__(self, storage):
1064         Abstract_Wallet.__init__(self, storage)
1065
1066     def has_seed(self):
1067         return self.seed != ''
1068
1069     def is_deterministic(self):
1070         return True
1071
1072     def is_watching_only(self):
1073         return not self.has_seed()
1074
1075     def add_seed(self, seed, password):
1076         if self.seed:
1077             raise Exception("a seed exists")
1078
1079         self.seed_version, self.seed = self.prepare_seed(seed)
1080         if password:
1081             self.seed = pw_encode( self.seed, password)
1082             self.use_encryption = True
1083         else:
1084             self.use_encryption = False
1085
1086         self.storage.put('seed', self.seed, True)
1087         self.storage.put('seed_version', self.seed_version, True)
1088         self.storage.put('use_encryption', self.use_encryption,True)
1089         self.create_master_keys(password)
1090
1091     def get_seed(self, password):
1092         return pw_decode(self.seed, password)
1093
1094     def get_mnemonic(self, password):
1095         return self.get_seed(password)
1096
1097     def change_gap_limit(self, value):
1098         if value >= self.gap_limit:
1099             self.gap_limit = value
1100             self.storage.put('gap_limit', self.gap_limit, True)
1101             #self.interface.poke('synchronizer')
1102             return True
1103
1104         elif value >= self.min_acceptable_gap():
1105             for key, account in self.accounts.items():
1106                 addresses = account[0]
1107                 k = self.num_unused_trailing_addresses(addresses)
1108                 n = len(addresses) - k + value
1109                 addresses = addresses[0:n]
1110                 self.accounts[key][0] = addresses
1111
1112             self.gap_limit = value
1113             self.storage.put('gap_limit', self.gap_limit, True)
1114             self.save_accounts()
1115             return True
1116         else:
1117             return False
1118
1119     def num_unused_trailing_addresses(self, addresses):
1120         k = 0
1121         for a in addresses[::-1]:
1122             if self.history.get(a):break
1123             k = k + 1
1124         return k
1125
1126     def min_acceptable_gap(self):
1127         # fixme: this assumes wallet is synchronized
1128         n = 0
1129         nmax = 0
1130
1131         for account in self.accounts.values():
1132             addresses = account.get_addresses(0)
1133             k = self.num_unused_trailing_addresses(addresses)
1134             for a in addresses[0:-k]:
1135                 if self.history.get(a):
1136                     n = 0
1137                 else:
1138                     n += 1
1139                     if n > nmax: nmax = n
1140         return nmax + 1
1141
1142     def create_new_address(self, account=None, for_change=0):
1143         if account is None:
1144             account = self.default_account()
1145         address = account.create_new_address(for_change)
1146         self.history[address] = []
1147         if self.synchronizer:
1148             self.synchronizer.add(address)
1149         self.save_accounts()
1150         return address
1151
1152     def synchronize_sequence(self, account, for_change):
1153         limit = self.gap_limit_for_change if for_change else self.gap_limit
1154         while True:
1155             addresses = account.get_addresses(for_change)
1156             if len(addresses) < limit:
1157                 self.create_new_address(account, for_change)
1158                 continue
1159             if map( lambda a: self.address_is_old(a), addresses[-limit:] ) == limit*[False]:
1160                 break
1161             else:
1162                 self.create_new_address(account, for_change)
1163
1164     def check_pending_accounts(self):
1165         for account_id, addr in self.next_addresses.items():
1166             if self.address_is_old(addr):
1167                 print_error( "creating account", account_id )
1168                 xpub = self.master_public_keys[account_id]
1169                 account = BIP32_Account({'xpub':xpub})
1170                 self.add_account(account_id, account)
1171                 self.next_addresses.pop(account_id)
1172
1173     def synchronize_account(self, account):
1174         self.synchronize_sequence(account, 0)
1175         self.synchronize_sequence(account, 1)
1176
1177     def synchronize(self):
1178         self.check_pending_accounts()
1179         for account in self.accounts.values():
1180             if type(account) in [ImportedAccount, PendingAccount]:
1181                 continue
1182             self.synchronize_account(account)
1183
1184     def restore(self, callback):
1185         from i18n import _
1186         def wait_for_wallet():
1187             self.set_up_to_date(False)
1188             while not self.is_up_to_date():
1189                 msg = "%s\n%s %d\n%s %.1f"%(
1190                     _("Please wait..."),
1191                     _("Addresses generated:"),
1192                     len(self.addresses(True)),
1193                     _("Kilobytes received:"),
1194                     self.network.interface.bytes_received/1024.)
1195
1196                 apply(callback, (msg,))
1197                 time.sleep(0.1)
1198
1199         def wait_for_network():
1200             while not self.network.is_connected():
1201                 msg = "%s \n" % (_("Connecting..."))
1202                 apply(callback, (msg,))
1203                 time.sleep(0.1)
1204
1205         # wait until we are connected, because the user might have selected another server
1206         if self.network:
1207             wait_for_network()
1208             wait_for_wallet()
1209         else:
1210             self.synchronize()
1211         self.fill_addressbook()
1212
1213     def create_account(self, name, password):
1214         i = self.num_accounts()
1215         account_id = self.account_id(i)
1216         account = self.make_account(account_id, password)
1217         self.add_account(account_id, account)
1218         if name:
1219             self.set_label(account_id, name)
1220
1221         # add address of the next account
1222         _, _ = self.next_account_address(password)
1223
1224
1225     def add_account(self, account_id, account):
1226         self.accounts[account_id] = account
1227         self.save_accounts()
1228
1229     def account_is_pending(self, k):
1230         return type(self.accounts.get(k)) == PendingAccount
1231
1232     def delete_pending_account(self, k):
1233         assert self.account_is_pending(k)
1234         self.accounts.pop(k)
1235         self.save_accounts()
1236
1237     def create_pending_account(self, name, password):
1238         account_id, addr = self.next_account_address(password)
1239         self.set_label(account_id, name)
1240         self.accounts[account_id] = PendingAccount({'pending':addr})
1241         self.save_accounts()
1242
1243     def is_beyond_limit(self, address, account, is_change):
1244         if type(account) == ImportedAccount:
1245             return False
1246         addr_list = account.get_addresses(is_change)
1247         i = addr_list.index(address)
1248         prev_addresses = addr_list[:max(0, i)]
1249         limit = self.gap_limit_for_change if is_change else self.gap_limit
1250         if len(prev_addresses) < limit:
1251             return False
1252         prev_addresses = prev_addresses[max(0, i - limit):]
1253         for addr in prev_addresses:
1254             if self.address_is_old(addr):
1255                 return False
1256         return True
1257
1258     def get_action(self):
1259         if not self.master_public_keys:
1260             return 'create_seed'
1261         if not self.accounts:
1262             return 'create_accounts'
1263
1264
1265 class NewWallet(Deterministic_Wallet):
1266
1267     def __init__(self, storage):
1268         Deterministic_Wallet.__init__(self, storage)
1269
1270     def default_account(self):
1271         return self.accounts["m/0'"]
1272
1273     def is_watching_only(self):
1274         return not bool(self.master_private_keys)
1275
1276     def can_create_accounts(self):
1277         return 'm/' in self.master_private_keys.keys()
1278
1279     def get_master_public_key(self):
1280         """xpub of the main account"""
1281         return self.master_public_keys.get("m/0'")
1282
1283     def get_master_public_keys(self):
1284         out = {}
1285         for k, account in self.accounts.items():
1286             name = self.get_account_name(k)
1287             mpk_text = '\n\n'.join( account.get_master_pubkeys() )
1288             out[name] = mpk_text
1289         return out
1290
1291     def get_master_private_key(self, account, password):
1292         k = self.master_private_keys.get(account)
1293         if not k: return
1294         xpriv = pw_decode( k, password)
1295         return xpriv
1296
1297     def check_password(self, password):
1298         xpriv = self.get_master_private_key( "m/", password )
1299         xpub = self.master_public_keys["m/"]
1300         assert deserialize_xkey(xpriv)[3] == deserialize_xkey(xpub)[3]
1301
1302     def create_xprv_wallet(self, xprv, password):
1303         xpub = bitcoin.xpub_from_xprv(xprv)
1304         account = BIP32_Account({'xpub':xpub})
1305         account_id = 'm/' + bitcoin.get_xkey_name(xpub)
1306         self.storage.put('seed_version', self.seed_version, True)
1307         self.add_master_private_key(account_id, xprv, password)
1308         self.add_master_public_key(account_id, xpub)
1309         self.add_account(account_id, account)
1310
1311     def create_watching_only_wallet(self, xpub):
1312         account = BIP32_Account({'xpub':xpub})
1313         account_id = 'm/' + bitcoin.get_xkey_name(xpub)
1314         self.storage.put('seed_version', self.seed_version, True)
1315         self.add_master_public_key(account_id, xpub)
1316         self.add_account(account_id, account)
1317
1318     def create_accounts(self, password):
1319         # First check the password is valid (this raises if it isn't).
1320         if not self.is_watching_only():
1321             self.check_password(password)
1322         self.create_account('Main account', password)
1323
1324     def add_master_public_key(self, name, xpub):
1325         self.master_public_keys[name] = xpub
1326         self.storage.put('master_public_keys', self.master_public_keys, True)
1327
1328     def add_master_private_key(self, name, xpriv, password):
1329         self.master_private_keys[name] = pw_encode(xpriv, password)
1330         self.storage.put('master_private_keys', self.master_private_keys, True)
1331
1332     def add_master_keys(self, root, account_id, password):
1333         x = self.master_private_keys.get(root)
1334         if x:
1335             master_xpriv = pw_decode(x, password )
1336             xpriv, xpub = bip32_private_derivation(master_xpriv, root, account_id)
1337             self.add_master_public_key(account_id, xpub)
1338             self.add_master_private_key(account_id, xpriv, password)
1339         else:
1340             master_xpub = self.master_public_keys[root]
1341             xpub = bip32_public_derivation(master_xpub, root, account_id)
1342             self.add_master_public_key(account_id, xpub)
1343         return xpub
1344
1345     def create_master_keys(self, password):
1346         xpriv, xpub = bip32_root(mnemonic_to_seed(self.get_seed(password),'').encode('hex'))
1347         self.add_master_public_key("m/", xpub)
1348         self.add_master_private_key("m/", xpriv, password)
1349
1350     def find_root_by_master_key(self, xpub):
1351         for key, xpub2 in self.master_public_keys.items():
1352             if key == "m/":continue
1353             if xpub == xpub2:
1354                 return key
1355
1356     def num_accounts(self):
1357         keys = []
1358         for k, v in self.accounts.items():
1359             if type(v) != BIP32_Account:
1360                 continue
1361             keys.append(k)
1362
1363         i = 0
1364         while True:
1365             account_id = self.account_id(i)
1366             if account_id not in keys: break
1367             i += 1
1368         return i
1369
1370     def next_account_address(self, password):
1371         i = self.num_accounts()
1372         account_id = self.account_id(i)
1373
1374         addr = self.next_addresses.get(account_id)
1375         if not addr:
1376             account = self.make_account(account_id, password)
1377             addr = account.first_address()
1378             self.next_addresses[account_id] = addr
1379             self.storage.put('next_addresses', self.next_addresses)
1380
1381         return account_id, addr
1382
1383     def account_id(self, i):
1384         return "m/%d'"%i
1385
1386     def make_account(self, account_id, password):
1387         """Creates and saves the master keys, but does not save the account"""
1388         xpub = self.add_master_keys("m/", account_id, password)
1389         account = BIP32_Account({'xpub':xpub})
1390         return account
1391
1392     def make_seed(self):
1393         import mnemonic, ecdsa
1394         entropy = ecdsa.util.randrange( pow(2,160) )
1395         nonce = 0
1396         while True:
1397             ss = "%040x"%(entropy+nonce)
1398             s = hashlib.sha256(ss.decode('hex')).digest().encode('hex')
1399             # we keep only 13 words, that's approximately 139 bits of entropy
1400             words = mnemonic.mn_encode(s)[0:13]
1401             seed = ' '.join(words)
1402             if is_new_seed(seed):
1403                 break  # this will remove 8 bits of entropy
1404             nonce += 1
1405         return seed
1406
1407     def prepare_seed(self, seed):
1408         import unicodedata
1409         return NEW_SEED_VERSION, unicodedata.normalize('NFC', unicode(seed.strip()))
1410
1411
1412 class Wallet_2of2(NewWallet):
1413     """ This class is used for multisignature addresses"""
1414
1415     def __init__(self, storage):
1416         NewWallet.__init__(self, storage)
1417         self.storage.put('wallet_type', '2of2', True)
1418
1419     def default_account(self):
1420         return self.accounts['m/']
1421
1422     def can_create_accounts(self):
1423         return False
1424
1425     def can_import(self):
1426         return False
1427
1428     def create_account(self, name, password):
1429         xpub1 = self.master_public_keys.get("m/")
1430         xpub2 = self.master_public_keys.get("cold/")
1431         account = BIP32_Account_2of2({'xpub':xpub1, 'xpub2':xpub2})
1432         self.add_account('m/', account)
1433
1434     def get_master_public_keys(self):
1435         xpub1 = self.master_public_keys.get("m/")
1436         xpub2 = self.master_public_keys.get("cold/")
1437         return {'hot':xpub1, 'cold':xpub2}
1438
1439     def get_action(self):
1440         xpub1 = self.master_public_keys.get("m/")
1441         xpub2 = self.master_public_keys.get("cold/")
1442         if xpub1 is None:
1443             return 'create_seed'
1444         if xpub2 is None:
1445             return 'add_cosigner'
1446         if not self.accounts:
1447             return 'create_accounts'
1448
1449
1450 class Wallet_2of3(Wallet_2of2):
1451     """ This class is used for multisignature addresses"""
1452
1453     def __init__(self, storage):
1454         Wallet_2of2.__init__(self, storage)
1455         self.storage.put('wallet_type', '2of3', True)
1456
1457     def create_account(self, name, password):
1458         xpub1 = self.master_public_keys.get("m/")
1459         xpub2 = self.master_public_keys.get("cold/")
1460         xpub3 = self.master_public_keys.get("remote/")
1461         account = BIP32_Account_2of3({'xpub':xpub1, 'xpub2':xpub2, 'xpub3':xpub3})
1462         self.add_account('m/', account)
1463
1464     def get_master_public_keys(self):
1465         xpub1 = self.master_public_keys.get("m/")
1466         xpub2 = self.master_public_keys.get("cold/")
1467         xpub3 = self.master_public_keys.get("remote/")
1468         return {'hot':xpub1, 'cold':xpub2, 'remote':xpub3}
1469
1470     def get_action(self):
1471         xpub1 = self.master_public_keys.get("m/")
1472         xpub2 = self.master_public_keys.get("cold/")
1473         xpub3 = self.master_public_keys.get("remote/")
1474         if xpub1 is None:
1475             return 'create_seed'
1476         if xpub2 is None or xpub3 is None:
1477             return 'add_two_cosigners'
1478         if not self.accounts:
1479             return 'create_accounts'
1480
1481
1482 class OldWallet(Deterministic_Wallet):
1483
1484     def default_account(self):
1485         return self.accounts[0]
1486
1487     def make_seed(self):
1488         import mnemonic
1489         seed = random_seed(128)
1490         return ' '.join(mnemonic.mn_encode(seed))
1491
1492     def prepare_seed(self, seed):
1493         import mnemonic
1494         # see if seed was entered as hex
1495         seed = seed.strip()
1496         try:
1497             assert seed
1498             seed.decode('hex')
1499             return OLD_SEED_VERSION, str(seed)
1500         except Exception:
1501             pass
1502
1503         words = seed.split()
1504         seed = mnemonic.mn_decode(words)
1505         if not seed:
1506             raise Exception("Invalid seed")
1507
1508         return OLD_SEED_VERSION, seed
1509
1510     def create_master_keys(self, password):
1511         seed = self.get_seed(password)
1512         mpk = OldAccount.mpk_from_seed(seed)
1513         self.storage.put('master_public_key', mpk, True)
1514
1515     def get_master_public_key(self):
1516         return self.storage.get("master_public_key")
1517
1518     def get_master_public_keys(self):
1519         return {'Main Account':self.get_master_public_key()}
1520
1521     def create_accounts(self, password):
1522         mpk = self.storage.get("master_public_key")
1523         self.create_account(mpk)
1524
1525     def create_account(self, mpk):
1526         self.accounts[0] = OldAccount({'mpk':mpk, 0:[], 1:[]})
1527         self.save_accounts()
1528
1529     def create_watching_only_wallet(self, mpk):
1530         self.seed_version = OLD_SEED_VERSION
1531         self.storage.put('seed_version', self.seed_version, True)
1532         self.storage.put('master_public_key', mpk, True)
1533         self.create_account(mpk)
1534
1535     def get_seed(self, password):
1536         seed = pw_decode(self.seed, password).encode('utf8')
1537         return seed
1538
1539     def check_password(self, password):
1540         seed = self.get_seed(password)
1541         self.accounts[0].check_seed(seed)
1542
1543     def get_mnemonic(self, password):
1544         import mnemonic
1545         s = self.get_seed(password)
1546         return ' '.join(mnemonic.mn_encode(s))
1547
1548     def check_pending_accounts(self):
1549         pass
1550
1551
1552 # former WalletFactory
1553 class Wallet(object):
1554     """The main wallet "entry point".
1555     This class is actually a factory that will return a wallet of the correct
1556     type when passed a WalletStorage instance."""
1557
1558     def __new__(self, storage):
1559         config = storage.config
1560
1561         self.wallet_types = [
1562             ('standard', ("Standard wallet"),          NewWallet if config.get('bip32') else OldWallet),
1563             ('imported', ("Imported wallet"),          Imported_Wallet),
1564             ('2of2',     ("Multisig wallet (2 of 2)"), Wallet_2of2),
1565             ('2of3',     ("Multisig wallet (2 of 3)"), Wallet_2of3)
1566         ]
1567         run_hook('add_wallet_types', self.wallet_types)
1568
1569         for t, l, WalletClass in self.wallet_types:
1570             if t == storage.get('wallet_type'):
1571                 return WalletClass(storage)
1572
1573         if not storage.file_exists:
1574             seed_version = NEW_SEED_VERSION if config.get('bip32') is True else OLD_SEED_VERSION
1575         else:
1576             seed_version = storage.get('seed_version')
1577             if not seed_version:
1578                 seed_version = OLD_SEED_VERSION if len(storage.get('master_public_key')) == 128 else NEW_SEED_VERSION
1579
1580         if seed_version == OLD_SEED_VERSION:
1581             return OldWallet(storage)
1582         elif seed_version == NEW_SEED_VERSION:
1583             return NewWallet(storage)
1584         else:
1585             msg = "This wallet seed is not supported."
1586             if seed_version in [5]:
1587                 msg += "\nTo open this wallet, try 'git checkout seed_v%d'"%seed_version
1588             print msg
1589             sys.exit(1)
1590
1591     @classmethod
1592     def is_seed(self, seed):
1593         if not seed:
1594             return False
1595         elif is_old_seed(seed):
1596             return True
1597         elif is_new_seed(seed):
1598             return True
1599         else:
1600             return False
1601
1602     @classmethod
1603     def is_old_mpk(self, mpk):
1604         try:
1605             int(mpk, 16)
1606             assert len(mpk) == 128
1607             return True
1608         except:
1609             return False
1610
1611     @classmethod
1612     def is_xpub(self, text):
1613         try:
1614             assert text[0:4] == 'xpub'
1615             deserialize_xkey(text)
1616             return True
1617         except:
1618             return False
1619
1620     @classmethod
1621     def is_xprv(self, text):
1622         try:
1623             assert text[0:4] == 'xprv'
1624             deserialize_xkey(text)
1625             return True
1626         except:
1627             return False
1628
1629     @classmethod
1630     def is_address(self, text):
1631         if not text:
1632             return False
1633         for x in text.split():
1634             if not bitcoin.is_address(x):
1635                 return False
1636         return True
1637
1638     @classmethod
1639     def is_private_key(self, text):
1640         if not text:
1641             return False
1642         for x in text.split():
1643             if not bitcoin.is_private_key(x):
1644                 return False
1645         return True
1646
1647     @classmethod
1648     def from_seed(self, seed, storage):
1649         if is_old_seed(seed):
1650             klass = OldWallet
1651         elif is_new_seed(seed):
1652             klass = NewWallet
1653         w = klass(storage)
1654         return w
1655
1656     @classmethod
1657     def from_address(self, text, storage):
1658         w = Imported_Wallet(storage)
1659         for x in text.split():
1660             w.accounts[IMPORTED_ACCOUNT].add(x, None, None, None)
1661         w.save_accounts()
1662         return w
1663
1664     @classmethod
1665     def from_private_key(self, text, storage):
1666         w = Imported_Wallet(storage)
1667         for x in text.split():
1668             w.import_key(x, None)
1669         return w
1670
1671     @classmethod
1672     def from_old_mpk(self, mpk, storage):
1673         w = OldWallet(storage)
1674         w.seed = ''
1675         w.create_watching_only_wallet(mpk)
1676         return w
1677
1678     @classmethod
1679     def from_xpub(self, xpub, storage):
1680         w = NewWallet(storage)
1681         w.create_watching_only_wallet(xpub)
1682         return w
1683
1684     @classmethod
1685     def from_xprv(self, xprv, password, storage):
1686         w = NewWallet(storage)
1687         w.create_xprv_wallet(xprv, password)
1688         return w