URI: 
       tMerge pull request #730 from chrisglass/pep8ing-phase-one - electrum - Electrum Bitcoin wallet
  HTML git clone https://git.parazyd.org/electrum
   DIR Log
   DIR Files
   DIR Refs
   DIR Submodules
       ---
   DIR commit c7489092bc371da685879b6afd389d06afc267b5
   DIR parent 6feebb7da37e272ea7e7a61a161eaf736d22e7bd
  HTML Author: ThomasV <thomasv1@gmx.de>
       Date:   Tue, 24 Jun 2014 16:30:22 +0200
       
       Merge pull request #730 from chrisglass/pep8ing-phase-one
       
       First cleanup branch
       Diffstat:
         M lib/commands.py                     |      65 +++++++++----------------------
         M lib/wallet.py                       |     216 ++++++++-----------------------
       
       2 files changed, 74 insertions(+), 207 deletions(-)
       ---
   DIR diff --git a/lib/commands.py b/lib/commands.py
       t@@ -16,13 +16,16 @@
        # You should have received a copy of the GNU General Public License
        # along with this program. If not, see <http://www.gnu.org/licenses/>.
        
       +import datetime
        import time
       -from util import *
       -from bitcoin import *
       +import copy
       +from util import print_msg, format_satoshis
       +from bitcoin import is_valid, hash_160_to_bc_address, hash_160
        from decimal import Decimal
        import bitcoin
        from transaction import Transaction
        
       +
        class Command:
            def __init__(self, name, min_args, max_args, requires_network, requires_wallet, requires_password, description, syntax = '', options_syntax = ''):
                self.name = name
       t@@ -35,7 +38,10 @@ class Command:
                self.syntax = syntax
                self.options = options_syntax
        
       +
        known_commands = {}
       +
       +
        def register_command(*args):
            global known_commands
            name = args[0]
       t@@ -105,8 +111,6 @@ register_command('getutxoaddress',       2, 2, True, False, False, 'get the addr
        register_command('sweep',                2, 3, True, False, False, 'Sweep a private key.', 'sweep privkey addr [fee]')
        
        
       -
       -
        class Commands:
        
            def __init__(self, wallet, network, callback = None):
       t@@ -115,7 +119,6 @@ class Commands:
                self._callback = callback
                self.password = None
        
       -
            def _run(self, method, args, password_getter):
                cmd = known_commands[method]
                if cmd.requires_password and self.wallet.use_encryption:
       t@@ -127,40 +130,33 @@ class Commands:
                    apply(self._callback, ())
                return result
        
       -
            def getaddresshistory(self, addr):
                return self.network.synchronous_get([ ('blockchain.address.get_history',[addr]) ])[0]
        
       -
            def daemon(self, arg):
                if arg=='stop':
                    return self.network.stop()
                elif arg=='status':
       -            return { 
       -                'server':self.network.main_server(), 
       +            return {
       +                'server':self.network.main_server(),
                        'connected':self.network.is_connected()
                    }
                else:
                    return "unknown command \"%s\""% arg
        
       -
            def listunspent(self):
       -        import copy
                l = copy.deepcopy(self.wallet.get_unspent_coins())
                for i in l: i["value"] = str(Decimal(i["value"])/100000000)
                return l
        
       -
            def getaddressunspent(self, addr):
                return self.network.synchronous_get([ ('blockchain.address.listunspent',[addr]) ])[0]
        
       -
            def getutxoaddress(self, txid, num):
                r = self.network.synchronous_get([ ('blockchain.utxo.get_address',[txid, num]) ])
       -        if r: 
       +        if r:
                    return {'address':r[0] }
        
       -
            def createrawtransaction(self, inputs, outputs):
                for i in inputs:
                    i['prevout_hash'] = i['txid']
       t@@ -169,7 +165,6 @@ class Commands:
                tx = Transaction.from_io(inputs, outputs)
                return tx
        
       -
            def signrawtransaction(self, raw_tx, private_keys):
                tx = Transaction(raw_tx)
                self.wallet.signrawtransaction(tx, private_keys, self.password)
       t@@ -188,10 +183,10 @@ class Commands:
                redeem_script = Transaction.multisig_script(pubkeys, num)
                address = hash_160_to_bc_address(hash_160(redeem_script.decode('hex')), 5)
                return {'address':address, 'redeemScript':redeem_script}
       -    
       +
            def freeze(self,addr):
                return self.wallet.freeze(addr)
       -        
       +
            def unfreeze(self,addr):
                return self.wallet.unfreeze(addr)
        
       t@@ -215,7 +210,6 @@ class Commands:
                out['pubkeys'] = self.wallet.getpubkeys(addr)
                return out
        
       -
            def getbalance(self, account= None):
                if account is None:
                    c, u = self.wallet.get_balance()
       t@@ -232,7 +226,6 @@ class Commands:
                out["unconfirmed"] =  str(Decimal(out["unconfirmed"])/100000000)
                return out
        
       -
            def getproof(self, addr):
                p = self.network.synchronous_get([ ('blockchain.address.get_proof',[addr]) ])[0]
                out = []
       t@@ -246,9 +239,9 @@ class Commands:
                return self.network.get_servers()
        
            def getversion(self):
       -        import electrum 
       +        import electrum  # Needs to stay here to prevent ciruclar imports
                return electrum.ELECTRUM_VERSION
       - 
       +
            def getmpk(self):
                return self.wallet.get_master_public_keys()
        
       t@@ -264,20 +257,16 @@ class Commands:
                    out = "Error: Keypair import failed: " + str(e)
                return out
        
       -
            def sweep(self, privkey, to_address, fee = 0.0001):
                fee = int(Decimal(fee)*100000000)
                return Transaction.sweep([privkey], self.network, to_address, fee)
        
       -
            def signmessage(self, address, message):
                return self.wallet.sign_message(address, message, self.password)
        
       -
            def verifymessage(self, address, signature, message):
                return bitcoin.verify_message(address, signature, message)
        
       -
            def _mktx(self, outputs, fee = None, change_addr = None, domain = None):
        
                for to_address, amount in outputs:
       t@@ -292,7 +281,7 @@ class Commands:
                    for addr in domain:
                        if not is_valid(addr):
                            raise Exception("invalid Bitcoin address", addr)
       -            
       +
                        if not self.wallet.is_mine(addr):
                            raise Exception("address not in wallet", addr)
        
       t@@ -310,11 +299,10 @@ class Commands:
        
                    amount = int(100000000*amount)
                    final_outputs.append((to_address, amount))
       -            
       +
                if fee: fee = int(100000000*fee)
                return self.wallet.mktx(final_outputs, self.password, fee , change_addr, domain)
        
       -
            def mktx(self, to_address, amount, fee = None, change_addr = None, domain = None):
                tx = self._mktx([(to_address, amount)], fee, change_addr, domain)
                return tx
       t@@ -323,7 +311,6 @@ class Commands:
                tx = self._mktx(outputs, fee, change_addr, domain)
                return tx
        
       -
            def payto(self, to_address, amount, fee = None, change_addr = None, domain = None):
                tx = self._mktx([(to_address, amount)], fee, change_addr, domain)
                r, h = self.wallet.sendtx( tx )
       t@@ -334,9 +321,7 @@ class Commands:
                r, h = self.wallet.sendtx( tx )
                return h
        
       -
            def history(self):
       -        import datetime
                balance = 0
                out = []
                for item in self.wallet.get_tx_history():
       t@@ -351,20 +336,15 @@ class Commands:
                    out.append({'txid':tx_hash, 'date':"%16s"%time_str, 'label':label, 'value':format_satoshis(value)})
                return out
        
       -
       -
            def setlabel(self, key, label):
                self.wallet.set_label(key, label)
        
       -            
       -
            def contacts(self):
                c = {}
                for addr in self.wallet.addressbook:
                    c[addr] = self.wallet.labels.get(addr)
                return c
        
       -
            def listaddresses(self, show_all = False, show_label = False):
                out = []
                for addr in self.wallet.addresses(True):
       t@@ -379,7 +359,7 @@ class Commands:
                            item = addr
                        out.append( item )
                return out
       -                         
       +
            def help(self, cmd=None):
                if cmd not in known_commands:
                    print_msg("\nList of commands:", ', '.join(sorted(known_commands)))
       t@@ -390,9 +370,7 @@ class Commands:
                    if cmd.options: print_msg("options:\n" + cmd.options)
                return None
        
       -
            def getrawtransaction(self, tx_hash):
       -        import transaction
                if self.wallet:
                    tx = self.wallet.transactions.get(tx_hash)
                    if tx:
       t@@ -400,17 +378,12 @@ class Commands:
        
                r = self.network.synchronous_get([ ('blockchain.transaction.get',[tx_hash]) ])[0]
                if r:
       -            return transaction.Transaction(r)
       +            return Transaction(r)
                else:
                    return "unknown transaction"
        
       -
            def encrypt(self, pubkey, message):
                return bitcoin.encrypt_message(message, pubkey)
        
       -
            def decrypt(self, pubkey, message):
                return self.wallet.decrypt_message(pubkey, message, self.password)
       -
       -
       -
   DIR diff --git a/lib/wallet.py b/lib/wallet.py
       t@@ -17,24 +17,21 @@
        # along with this program. If not, see <http://www.gnu.org/licenses/>.
        
        import sys
       -import base64
        import os
       -import re
        import hashlib
       -import copy
       -import operator
        import ast
        import threading
        import random
       -import aes
       -import Queue
        import time
        import math
        
       -from util import print_msg, print_error, format_satoshis
       +from util import print_msg, print_error
       +
        from bitcoin import *
        from account import *
       -from transaction import Transaction, is_extended_pubkey
       +from version import *
       +
       +from transaction import Transaction
        from plugins import run_hook
        import bitcoin
        from synchronizer import WalletSynchronizer
       t@@ -47,9 +44,6 @@ IMPORTED_ACCOUNT = '/x'
        
        
        
       -from version import *
       -
       -
        class WalletStorage:
        
            def __init__(self, config):
       t@@ -109,7 +103,7 @@ class WalletStorage:
        
            def get(self, key, default=None):
                v = self.data.get(key)
       -        if v is None: 
       +        if v is None:
                    v = default
                return v
        
       t@@ -120,7 +114,7 @@ class WalletStorage:
                        self.data[key] = value
                    elif key in self.data:
                        self.data.pop(key)
       -            if save: 
       +            if save:
                        self.write()
        
            def write(self):
       t@@ -133,15 +127,9 @@ class WalletStorage:
                    os.chmod(self.path,stat.S_IREAD | stat.S_IWRITE)
        
        
       -
       -    
       -
       -        
       -
        class Abstract_Wallet:
        
            def __init__(self, storage):
       -
                self.storage = storage
                self.electrum_version = ELECTRUM_VERSION
                self.gap_limit_for_change = 3 # constant
       t@@ -198,16 +186,14 @@ class Abstract_Wallet:
                # there is a difference between wallet.up_to_date and interface.is_up_to_date()
                # interface.is_up_to_date() returns true when all requests have been answered and processed
                # wallet.up_to_date is true when the wallet is synchronized (stronger requirement)
       -        
       +
                self.up_to_date = False
                self.lock = threading.Lock()
                self.transaction_lock = threading.Lock()
                self.tx_event = threading.Event()
       -
                for tx_hash, tx in self.transactions.items():
                    self.update_tx_outputs(tx_hash)
        
       -
            def add_extra_addresses(self, tx):
                h = tx.hash()
                # find the address corresponding to pay-to-pubkey inputs
       t@@ -217,11 +203,9 @@ class Abstract_Wallet:
                        for tx2 in self.transactions.values():
                            tx2.add_extra_addresses({h:tx})
        
       -
            def get_action(self):
                pass
        
       -
            def convert_imported_keys(self, password):
                for k, v in self.imported_keys.items():
                    sec = pw_decode(v, password)
       t@@ -232,7 +216,6 @@ class Abstract_Wallet:
                    self.imported_keys.pop(k)
                self.storage.put('imported_keys', self.imported_keys)
        
       -
            def load_accounts(self):
                self.accounts = {}
                self.imported_keys = self.storage.get('imported_keys',{})
       t@@ -255,7 +238,6 @@ class Abstract_Wallet:
                    else:
                        print_error("cannot load account", v)
        
       -
            def synchronize(self):
                pass
        
       t@@ -268,15 +250,14 @@ class Abstract_Wallet:
            def is_up_to_date(self):
                with self.lock: return self.up_to_date
        
       -
            def update(self):
                self.up_to_date = False
       -        while not self.is_up_to_date(): 
       +        while not self.is_up_to_date():
                    time.sleep(0.1)
        
            def is_imported(self, addr):
                account = self.accounts.get(IMPORTED_ACCOUNT)
       -        if account: 
       +        if account:
                    return addr in account.get_addresses(0)
                else:
                    return False
       t@@ -294,16 +275,15 @@ class Abstract_Wallet:
        
                if self.is_mine(address):
                    raise Exception('Address already in wallet')
       -        
       +
                if self.accounts.get(IMPORTED_ACCOUNT) is None:
                    self.accounts[IMPORTED_ACCOUNT] = ImportedAccount({'imported':{}})
                self.accounts[IMPORTED_ACCOUNT].add(address, pubkey, sec, password)
                self.save_accounts()
       -        
       +
                if self.synchronizer:
                    self.synchronizer.subscribe_to_addresses([address])
                return address
       -        
        
            def delete_imported_key(self, addr):
                account = self.accounts[IMPORTED_ACCOUNT]
       t@@ -312,7 +292,6 @@ class Abstract_Wallet:
                    self.accounts.pop(IMPORTED_ACCOUNT)
                self.save_accounts()
        
       -
            def set_label(self, name, text = None):
                changed = False
                old_text = self.labels.get(name)
       t@@ -331,9 +310,6 @@ class Abstract_Wallet:
                run_hook('set_label', name, text, changed)
                return changed
        
       -
       -
       -
            def addresses(self, include_change = True, _next=True):
                o = []
                for a in self.accounts.keys():
       t@@ -345,10 +321,8 @@ class Abstract_Wallet:
                            o += [addr]
                return o
        
       -
            def is_mine(self, address):
       -        return address in self.addresses(True) 
       -
       +        return address in self.addresses(True)
        
            def is_change(self, address):
                if not self.is_mine(address): return False
       t@@ -356,7 +330,6 @@ class Abstract_Wallet:
                if s is None: return False
                return s[0] == 1
        
       -
            def get_address_index(self, address):
        
                for account in self.accounts.keys():
       t@@ -372,26 +345,22 @@ class Abstract_Wallet:
        
                raise Exception("Address not found", address)
        
       -
            def getpubkeys(self, addr):
                assert is_valid(addr) and self.is_mine(addr)
                account, sequence = self.get_address_index(addr)
                a = self.accounts[account]
                return a.get_pubkeys( sequence )
        
       -
            def get_private_key(self, address, password):
                if self.is_watching_only():
                    return []
                account_id, sequence = self.get_address_index(address)
                return self.accounts[account_id].get_private_key(sequence, self, password)
        
       -
            def get_public_keys(self, address):
                account_id, sequence = self.get_address_index(address)
                return self.accounts[account_id].get_pubkeys(sequence)
        
       -
            def can_sign(self, tx):
        
                if self.is_watching_only():
       t@@ -411,15 +380,11 @@ class Abstract_Wallet:
                        return True
        
                return False
       -            
       -
        
            def add_keypairs(self, tx, keypairs, password):
       -        # first check the provided password
       -        seed = self.get_seed(password)
       -
       +        # first check the provided password. This will raise if invalid.
       +        self.get_seed(password)
                addr_list, xpub_list = tx.inputs_to_sign()
       -
                for addr in addr_list:
                    if self.is_mine(addr):
                        private_keys = self.get_private_key(address, password)
       t@@ -441,12 +406,9 @@ class Abstract_Wallet:
                        pubkey = public_key_from_private_key(sec)
                        keypairs[pubkey] = sec
        
       -
       -
            def signrawtransaction(self, tx, private_keys, password):
       -
       -        # check that the password is correct
       -        seed = self.get_seed(password)
       +        # check that the password is correct. This will raise if it's not.
       +        self.get_seed(password)
        
                # build a list of public/private keys
                keypairs = {}
       t@@ -462,7 +424,6 @@ class Abstract_Wallet:
                # sign the transaction
                self.sign_transaction(tx, keypairs, password)
        
       -
            def sign_message(self, address, message, password):
                keys = self.get_private_key(address, password)
                assert len(keys) == 1
       t@@ -471,8 +432,6 @@ class Abstract_Wallet:
                compressed = is_compressed(sec)
                return key.sign_message(message, compressed, address)
        
       -
       -
            def decrypt_message(self, pubkey, message, password):
                address = public_key_to_bc_address(pubkey.decode('hex'))
                keys = self.get_private_key(address, password)
       t@@ -481,25 +440,20 @@ class Abstract_Wallet:
                decrypted = ec.decrypt_message(message)
                return decrypted
        
       -
       -
            def is_found(self):
       -        return self.history.values() != [[]] * len(self.history) 
       -
       +        return self.history.values() != [[]] * len(self.history)
        
            def add_contact(self, address, label=None):
                self.addressbook.append(address)
                self.storage.put('contacts', self.addressbook, True)
       -        if label:  
       +        if label:
                    self.set_label(address, label)
        
       -
            def delete_contact(self, addr):
                if addr in self.addressbook:
                    self.addressbook.remove(addr)
                    self.storage.put('addressbook', self.addressbook, True)
        
       -
            def fill_addressbook(self):
                for tx_hash, tx in self.transactions.items():
                    is_relevant, is_send, _, _ = self.get_tx_value(tx)
       t@@ -511,23 +465,20 @@ class Abstract_Wallet:
                # self.update_tx_labels()
        
            def get_num_tx(self, address):
       -        n = 0 
       +        n = 0
                for tx in self.transactions.values():
                    if address in map(lambda x:x[0], tx.outputs): n += 1
                return n
        
       -
            def get_address_flags(self, addr):
       -        flags = "C" if self.is_change(addr) else "I" if addr in self.imported_keys.keys() else "-" 
       +        flags = "C" if self.is_change(addr) else "I" if addr in self.imported_keys.keys() else "-"
                flags += "F" if addr in self.frozen_addresses else "-"
                return flags
       -        
        
            def get_tx_value(self, tx, account=None):
                domain = self.get_account_addresses(account)
                return tx.get_value(domain, self.prevout_values)
        
       -    
            def update_tx_outputs(self, tx_hash):
                tx = self.transactions.get(tx_hash)
        
       t@@ -540,7 +491,6 @@ class Abstract_Wallet:
                        key = item['prevout_hash'] + ':%d'%item['prevout_n']
                        self.spent_outputs.append(key)
        
       -
            def get_addr_balance(self, address):
                #assert self.is_mine(address)
                h = self.history.get(address,[])
       t@@ -567,7 +517,7 @@ class Abstract_Wallet:
                        if addr == address:
                            key = item['prevout_hash']  + ':%d'%item['prevout_n']
                            value = self.prevout_values.get( key )
       -                    if key in received_coins: 
       +                    if key in received_coins:
                                v -= value
        
                    for i, (addr, value) in enumerate(tx.outputs):
       t@@ -581,18 +531,15 @@ class Abstract_Wallet:
                        u += v
                return c, u
        
       -
            def get_account_name(self, k):
                return self.labels.get(k, self.accounts[k].get_name(k))
        
       -
            def get_account_names(self):
                account_names = {}
                for k in self.accounts.keys():
                    account_names[k] = self.get_account_name(k)
                return account_names
        
       -
            def get_account_addresses(self, a, include_change=True):
                if a is None:
                    o = self.addresses(True)
       t@@ -602,13 +549,12 @@ class Abstract_Wallet:
                    if include_change: o += ac.get_addresses(1)
                return o
        
       -
            def get_account_balance(self, account):
                return self.get_balance(self.get_account_addresses(account))
        
            def get_frozen_balance(self):
                return self.get_balance(self.frozen_addresses)
       -        
       +
            def get_balance(self, domain=None):
                if domain is None: domain = self.addresses(True)
                cc = uu = 0
       t@@ -618,7 +564,6 @@ class Abstract_Wallet:
                    uu += u
                return cc, uu
        
       -
            def get_unspent_coins(self, domain=None):
                coins = []
                if domain is None: domain = self.addresses(True)
       t@@ -643,11 +588,10 @@ class Abstract_Wallet:
                if coins:
                    coins = sorted(coins)
                    if coins[-1][0] != 0:
       -                while coins[0][0] == 0: 
       +                while coins[0][0] == 0:
                            coins = coins[1:] + [ coins[0] ]
                return [x[1] for x in coins]
        
       -
            def choose_tx_inputs( self, amount, fixed_fee, num_outputs, domain = None, coins = None ):
                """ todo: minimize tx size """
                total = 0
       t@@ -665,7 +609,6 @@ class Abstract_Wallet:
                for item in coins:
                    if item.get('coinbase') and item.get('height') + COINBASE_MATURITY > self.network.get_local_height():
                        continue
       -            addr = item.get('address')
                    v = item.get('value')
                    total += v
                    inputs.append(item)
       t@@ -676,18 +619,16 @@ class Abstract_Wallet:
        
                return inputs, total, fee
        
       -
            def set_fee(self, fee):
                if self.fee != fee:
                    self.fee = fee
                    self.storage.put('fee_per_kb', self.fee, True)
       -        
       +
            def estimated_fee(self, inputs, num_outputs):
                estimated_size =  len(inputs) * 180 + num_outputs * 34    # this assumes non-compressed keys
                fee = self.fee * int(math.ceil(estimated_size/1000.))
                return fee
        
       -
            def add_tx_change( self, inputs, outputs, amount, fee, total, change_addr=None):
                "add change to a transaction"
                change_amount = total - ( amount + fee )
       t@@ -708,12 +649,10 @@ class Abstract_Wallet:
                    outputs[posn:posn] = [( change_addr,  change_amount)]
                return outputs
        
       -
            def get_history(self, address):
                with self.lock:
                    return self.history.get(address)
        
       -
            def get_status(self, h):
                if not h: return None
                if h == ['*']: return '*'
       t@@ -722,7 +661,6 @@ class Abstract_Wallet:
                    status += tx_hash + ':%d:' % height
                return hashlib.sha256( status ).digest().encode('hex')
        
       -
            def receive_tx_callback(self, tx_hash, tx, tx_height):
        
                with self.transaction_lock:
       t@@ -734,11 +672,10 @@ class Abstract_Wallet:
                    self.transactions[tx_hash] = tx
                    self.network.pending_transactions_for_notifications.append(tx)
                    self.save_transactions()
       -            if self.verifier and tx_height>0: 
       +            if self.verifier and tx_height>0:
                        self.verifier.add(tx_hash, tx_height)
                    self.update_tx_outputs(tx_hash)
        
       -
            def save_transactions(self):
                tx = {}
                for k,v in self.transactions.items():
       t@@ -749,7 +686,7 @@ class Abstract_Wallet:
        
                if not self.check_new_history(addr, hist):
                    raise Exception("error: received history for %s is not consistent with known transactions"%addr)
       -            
       +
                with self.lock:
                    self.history[addr] = hist
                    self.storage.put('addr_history', self.history, True)
       t@@ -760,7 +697,6 @@ class Abstract_Wallet:
                            # add it in case it was previously unconfirmed
                            if self.verifier: self.verifier.add(tx_hash, tx_height)
        
       -
            def get_tx_history(self, account=None):
                if not self.verifier:
                    return []
       t@@ -769,7 +705,7 @@ class Abstract_Wallet:
                    history = self.transactions.items()
                    history.sort(key = lambda x: self.verifier.get_txpos(x[0]))
                    result = []
       -    
       +
                    balance = 0
                    for tx_hash, tx in history:
                        is_relevant, is_mine, v, fee = self.get_tx_value(tx, account)
       t@@ -793,14 +729,12 @@ class Abstract_Wallet:
        
                return result
        
       -
            def get_label(self, tx_hash):
                label = self.labels.get(tx_hash)
                is_default = (label == '') or (label is None)
                if is_default: label = self.get_default_label(tx_hash)
                return label, is_default
        
       -
            def get_default_label(self, tx_hash):
                tx = self.transactions.get(tx_hash)
                default_label = ''
       t@@ -831,7 +765,6 @@ class Abstract_Wallet:
                                o_addr = None
        
                        if o_addr:
       -                    dest_label = self.labels.get(o_addr)
                            try:
                                default_label = self.labels[o_addr]
                            except KeyError:
       t@@ -839,7 +772,6 @@ class Abstract_Wallet:
        
                return default_label
        
       -
            def make_unsigned_transaction(self, outputs, fee=None, change_addr=None, domain=None, coins=None ):
                for address, x in outputs:
                    assert is_valid(address), "Address " + address + " is invalid!"
       t@@ -852,7 +784,6 @@ class Abstract_Wallet:
                outputs = self.add_tx_change(inputs, outputs, amount, fee, total, change_addr)
                return Transaction.from_io(inputs, outputs)
        
       -
            def mktx(self, outputs, password, fee=None, change_addr=None, domain= None, coins = None ):
                tx = self.make_unsigned_transaction(outputs, fee, change_addr, domain, coins)
                keypairs = {}
       t@@ -861,7 +792,6 @@ class Abstract_Wallet:
                    self.sign_transaction(tx, keypairs, password)
                return tx
        
       -
            def add_input_info(self, txin):
                address = txin['address']
                account_id, sequence = self.get_address_index(address)
       t@@ -871,19 +801,17 @@ class Abstract_Wallet:
                txin['pubkeys'] = pubkeys = account.get_pubkeys(sequence)
                txin['signatures'] = [None] * len(pubkeys)
        
       -        if redeemScript: 
       +        if redeemScript:
                    txin['redeemScript'] = redeemScript
                    txin['num_sig'] = 2
                else:
                    txin['redeemPubkey'] = account.get_pubkey(*sequence)
                    txin['num_sig'] = 1
        
       -
            def sign_transaction(self, tx, keypairs, password):
                tx.sign(keypairs)
                run_hook('sign_transaction', tx, password)
        
       -
            def sendtx(self, tx):
                # synchronous
                h = self.send_tx(tx)
       t@@ -901,15 +829,14 @@ class Abstract_Wallet:
                self.tx_event.set()
        
            def receive_tx(self, tx_hash, tx):
       -        out = self.tx_result 
       +        out = self.tx_result
                if out != tx_hash:
                    return False, "error: " + out
                run_hook('receive_tx', tx, self)
                return True, out
        
       -
            def update_password(self, old_password, new_password):
       -        if new_password == '': 
       +        if new_password == '':
                    new_password = None
        
                if self.has_seed():
       t@@ -918,7 +845,7 @@ class Abstract_Wallet:
                    self.storage.put('seed', self.seed, True)
        
                imported_account = self.accounts.get(IMPORTED_ACCOUNT)
       -        if imported_account: 
       +        if imported_account:
                    imported_account.update_password(old_password, new_password)
                    self.save_accounts()
        
       t@@ -931,7 +858,6 @@ class Abstract_Wallet:
                self.use_encryption = (new_password != None)
                self.storage.put('use_encryption', self.use_encryption,True)
        
       -
            def freeze(self,addr):
                if self.is_mine(addr) and addr not in self.frozen_addresses:
                    self.frozen_addresses.append(addr)
       t@@ -940,7 +866,6 @@ class Abstract_Wallet:
                else:
                    return False
        
       -
            def unfreeze(self,addr):
                if self.is_mine(addr) and addr in self.frozen_addresses:
                    self.frozen_addresses.remove(addr)
       t@@ -949,7 +874,6 @@ class Abstract_Wallet:
                else:
                    return False
        
       -
            def set_verifier(self, verifier):
                self.verifier = verifier
        
       t@@ -967,9 +891,7 @@ class Abstract_Wallet:
                    if tx_hash not in vr:
                        self.transactions.pop(tx_hash)
        
       -
            def check_new_history(self, addr, hist):
       -        
                # check that all tx in hist are relevant
                if hist != ['*']:
                    for tx_hash, height in hist:
       t@@ -997,7 +919,7 @@ class Abstract_Wallet:
                        tx = self.transactions.get(tx_hash)
                        # tx might not be there
                        if not tx: continue
       -                
       +
                        # already verified?
                        if self.verifier.get_height(tx_hash):
                            continue
       t@@ -1026,14 +948,13 @@ class Abstract_Wallet:
        
                return True
        
       -
            def check_new_tx(self, tx_hash, tx):
       -        # 1 check that tx is referenced in addr_history. 
       +        # 1 check that tx is referenced in addr_history.
                addresses = []
                for addr, hist in self.history.items():
                    if hist == ['*']:continue
                    for txh, height in hist:
       -                if txh == tx_hash: 
       +                if txh == tx_hash:
                            addresses.append(addr)
        
                if not addresses:
       t@@ -1046,7 +967,6 @@ class Abstract_Wallet:
        
                return True
        
       -
            def start_threads(self, network):
                from verifier import TxVerifier
                self.network = network
       t@@ -1084,7 +1004,7 @@ class Abstract_Wallet:
                h = self.history.get(address,[])
                c, u = self.get_addr_balance(address)
                return len(h), len(h) > 0 and c == -u
       -    
       +
        
        class Imported_Wallet(Abstract_Wallet):
        
       t@@ -1095,7 +1015,6 @@ class Imported_Wallet(Abstract_Wallet):
                    self.accounts[IMPORTED_ACCOUNT] = ImportedAccount({'imported':{}})
                self.storage.put('wallet_type', 'imported', True)
        
       -
            def is_watching_only(self):
                acc = self.accounts[IMPORTED_ACCOUNT]
                n = acc.keypairs.values()
       t@@ -1130,11 +1049,11 @@ class Deterministic_Wallet(Abstract_Wallet):
                return not self.has_seed()
        
            def add_seed(self, seed, password):
       -        if self.seed: 
       +        if self.seed:
                    raise Exception("a seed exists")
       -        
       +
                self.seed_version, self.seed = self.prepare_seed(seed)
       -        if password: 
       +        if password:
                    self.seed = pw_encode( self.seed, password)
                    self.use_encryption = True
                else:
       t@@ -1150,7 +1069,7 @@ class Deterministic_Wallet(Abstract_Wallet):
        
            def get_mnemonic(self, password):
                return self.get_seed(password)
       -        
       +
            def change_gap_limit(self, value):
                if value >= self.gap_limit:
                    self.gap_limit = value
       t@@ -1196,7 +1115,6 @@ class Deterministic_Wallet(Abstract_Wallet):
                            if n > nmax: nmax = n
                return nmax + 1
        
       -
            def address_is_old(self, address):
                age = -1
                h = self.history.get(address, [])
       t@@ -1211,7 +1129,6 @@ class Deterministic_Wallet(Abstract_Wallet):
                        age = tx_age
                return age > 2
        
       -
            def synchronize_sequence(self, account, for_change):
                limit = self.gap_limit_for_change if for_change else self.gap_limit
                new_addresses = []
       t@@ -1231,7 +1148,6 @@ class Deterministic_Wallet(Abstract_Wallet):
                        new_addresses.append( address )
        
                return new_addresses
       -        
        
            def check_pending_accounts(self):
                for account_id, addr in self.next_addresses.items():
       t@@ -1242,14 +1158,12 @@ class Deterministic_Wallet(Abstract_Wallet):
                        self.add_account(account_id, account)
                        self.next_addresses.pop(account_id)
        
       -
            def synchronize_account(self, account):
                new = []
                new += self.synchronize_sequence(account, 0)
                new += self.synchronize_sequence(account, 1)
                return new
        
       -
            def synchronize(self):
                self.check_pending_accounts()
                new = []
       t@@ -1262,7 +1176,6 @@ class Deterministic_Wallet(Abstract_Wallet):
                    self.storage.put('addr_history', self.history, True)
                return new
        
       -
            def restore(self, callback):
                from i18n import _
                def wait_for_wallet():
       t@@ -1271,8 +1184,8 @@ class Deterministic_Wallet(Abstract_Wallet):
                        msg = "%s\n%s %d\n%s %.1f"%(
                            _("Please wait..."),
                            _("Addresses generated:"),
       -                    len(self.addresses(True)), 
       -                    _("Kilobytes received:"), 
       +                    len(self.addresses(True)),
       +                    _("Kilobytes received:"),
                            self.network.interface.bytes_received/1024.)
        
                        apply(callback, (msg,))
       t@@ -1290,10 +1203,8 @@ class Deterministic_Wallet(Abstract_Wallet):
                    wait_for_wallet()
                else:
                    self.synchronize()
       -            
                self.fill_addressbook()
        
       -
            def create_account(self, name, password):
                i = self.num_accounts()
                account_id = self.account_id(i)
       t@@ -1310,8 +1221,6 @@ class Deterministic_Wallet(Abstract_Wallet):
                self.accounts[account_id] = account
                self.save_accounts()
        
       -
       -
            def account_is_pending(self, k):
                return type(self.accounts.get(k)) == PendingAccount
        
       t@@ -1327,8 +1236,6 @@ class Deterministic_Wallet(Abstract_Wallet):
                self.save_accounts()
        
        
       -
       -
        class NewWallet(Deterministic_Wallet):
        
            def __init__(self, storage):
       t@@ -1365,25 +1272,22 @@ class NewWallet(Deterministic_Wallet):
                account = BIP32_Account({'xpub':xpub})
                self.add_account("m/", account)
        
       -
            def create_accounts(self, password):
       -        seed = pw_decode(self.seed, password)
       +        # First check the password is valid (this raises if it isn't).
       +        pw_decode(self.seed, password)
                self.create_account('Main account', password)
        
       -
            def add_master_public_key(self, name, mpk):
                self.master_public_keys[name] = mpk
                self.storage.put('master_public_keys', self.master_public_keys, True)
        
       -
            def add_master_private_key(self, name, xpriv, password):
                self.master_private_keys[name] = pw_encode(xpriv, password)
                self.storage.put('master_private_keys', self.master_private_keys, True)
        
       -
            def add_master_keys(self, root, account_id, password):
                x = self.master_private_keys.get(root)
       -        if x: 
       +        if x:
                    master_xpriv = pw_decode(x, password )
                    xpriv, xpub = bip32_private_derivation(master_xpriv, root, account_id)
                    self.add_master_public_key(account_id, xpub)
       t@@ -1394,20 +1298,17 @@ class NewWallet(Deterministic_Wallet):
                    self.add_master_public_key(account_id, xpub)
                return xpub
        
       -
            def create_master_keys(self, password):
                xpriv, xpub = bip32_root(mnemonic_to_seed(self.get_seed(password),'').encode('hex'))
                self.add_master_public_key("m/", xpub)
                self.add_master_private_key("m/", xpriv, password)
        
       -
            def find_root_by_master_key(self, xpub):
                for key, xpub2 in self.master_public_keys.items():
                    if key == "m/":continue
                    if xpub == xpub2:
                        return key
        
       -
            def num_accounts(self):
                keys = []
                for k, v in self.accounts.items():
       t@@ -1422,13 +1323,12 @@ class NewWallet(Deterministic_Wallet):
                    i += 1
                return i
        
       -
            def next_account_address(self, password):
                i = self.num_accounts()
                account_id = self.account_id(i)
        
                addr = self.next_addresses.get(account_id)
       -        if not addr: 
       +        if not addr:
                    account = self.make_account(account_id, password)
                    addr = account.first_address()
                    self.next_addresses[account_id] = addr
       t@@ -1445,7 +1345,6 @@ class NewWallet(Deterministic_Wallet):
                account = BIP32_Account({'xpub':xpub})
                return account
        
       -
            def make_seed(self):
                import mnemonic, ecdsa
                entropy = ecdsa.util.randrange( pow(2,160) )
       t@@ -1454,7 +1353,7 @@ class NewWallet(Deterministic_Wallet):
                    ss = "%040x"%(entropy+nonce)
                    s = hashlib.sha256(ss.decode('hex')).digest().encode('hex')
                    # we keep only 13 words, that's approximately 139 bits of entropy
       -            words = mnemonic.mn_encode(s)[0:13] 
       +            words = mnemonic.mn_encode(s)[0:13]
                    seed = ' '.join(words)
                    if is_new_seed(seed):
                        break  # this will remove 8 bits of entropy
       t@@ -1466,8 +1365,8 @@ class NewWallet(Deterministic_Wallet):
                return NEW_SEED_VERSION, unicodedata.normalize('NFC', unicode(seed.strip()))
        
        
       -
        class Wallet_2of2(NewWallet):
       +    """ This class is used for multisignature addresses"""
        
            def __init__(self, storage):
                NewWallet.__init__(self, storage)
       t@@ -1499,8 +1398,8 @@ class Wallet_2of2(NewWallet):
                    return 'create_2of2_2'
        
        
       -
        class Wallet_2of3(Wallet_2of2):
       +    """ This class is used for multisignature addresses"""
        
            def __init__(self, storage):
                Wallet_2of2.__init__(self, storage)
       t@@ -1532,9 +1431,6 @@ class Wallet_2of3(Wallet_2of2):
                    return 'create_2of3_2'
        
        
       -
       -
       -
        class OldWallet(Deterministic_Wallet):
        
            def make_seed(self):
       t@@ -1557,9 +1453,8 @@ class OldWallet(Deterministic_Wallet):
                seed = mnemonic.mn_decode(words)
                if not seed:
                    raise Exception("Invalid seed")
       -            
       -        return OLD_SEED_VERSION, seed
        
       +        return OLD_SEED_VERSION, seed
        
            def create_master_keys(self, password):
                seed = self.get_seed(password)
       t@@ -1605,6 +1500,9 @@ class OldWallet(Deterministic_Wallet):
        
        # former WalletFactory
        class Wallet(object):
       +    """The main wallet "entry point".
       +    This class is actually a factory that will return a wallet of the correct
       +    type when passed a WalletStorage instance."""
        
            def __new__(self, storage):
                config = storage.config
       t@@ -1623,7 +1521,6 @@ class Wallet(object):
                if storage.get('wallet_type') == 'imported':
                    return Imported_Wallet(storage)
        
       -
                if not storage.file_exists:
                    seed_version = NEW_SEED_VERSION if config.get('bip32') is True else OLD_SEED_VERSION
                else:
       t@@ -1642,8 +1539,6 @@ class Wallet(object):
                    print msg
                    sys.exit(1)
        
       -
       -
            @classmethod
            def is_seed(self, seed):
                if not seed:
       t@@ -1652,7 +1547,7 @@ class Wallet(object):
                    return True
                elif is_new_seed(seed):
                    return True
       -        else: 
       +        else:
                    return False
        
            @classmethod
       t@@ -1662,7 +1557,7 @@ class Wallet(object):
                    old = True
                except:
                    old = False
       -            
       +
                if old:
                    return len(mpk) == 128
                else:
       t@@ -1716,7 +1611,6 @@ class Wallet(object):
        
            @classmethod
            def from_mpk(self, mpk, storage):
       -
                try:
                    int(mpk, 16)
                    old = True