change estimated_fee to include 34 bytes per output instead of hard-coded 80 (issue...
[electrum-nvc.git] / lib / wallet.py
index 450f674..3948a95 100644 (file)
@@ -29,6 +29,7 @@ import random
 import aes
 import Queue
 import time
+import math
 
 from util import print_msg, print_error, format_satoshis
 from bitcoin import *
@@ -37,6 +38,7 @@ from transaction import Transaction
 from plugins import run_hook
 
 COINBASE_MATURITY = 100
+DUST_THRESHOLD = 5430
 
 # AES encryption
 EncodeAES = lambda secret, s: base64.b64encode(aes.encryptData(secret,s))
@@ -54,8 +56,8 @@ def pw_decode(s, password):
         secret = Hash(password)
         try:
             d = DecodeAES(secret, s)
-        except:
-            raise BaseException('Invalid password')
+        except Exception:
+            raise Exception('Invalid password')
         return d
     else:
         return s
@@ -71,6 +73,7 @@ class WalletStorage:
 
     def __init__(self, config):
         self.lock = threading.Lock()
+        self.config = config
         self.data = {}
         self.file_exists = False
         self.path = self.init_path(config)
@@ -116,7 +119,7 @@ class WalletStorage:
             return
         try:
             d = ast.literal_eval( data )  #parse raw data from reading wallet file
-        except:
+        except Exception:
             raise IOError("Cannot read wallet file.")
 
         self.data = d
@@ -124,7 +127,10 @@ class WalletStorage:
 
 
     def get(self, key, default=None):
-        return self.data.get(key, default)
+        v = self.data.get(key)
+        if v is None: 
+            v = default
+        return v
 
     def put(self, key, value, save = True):
 
@@ -132,7 +138,7 @@ class WalletStorage:
             if value is not None:
                 self.data[key] = value
             else:
-                self.data.pop[key]
+                self.data.pop(key)
             if save: 
                 self.write()
 
@@ -146,7 +152,10 @@ class WalletStorage:
             os.chmod(self.path,stat.S_IREAD | stat.S_IWRITE)
 
 
-class Wallet:
+
+    
+
+class NewWallet:
 
     def __init__(self, storage):
 
@@ -155,7 +164,7 @@ class Wallet:
         self.gap_limit_for_change = 3 # constant
 
         # saved fields
-        self.seed_version          = storage.get('seed_version', SEED_VERSION)
+        self.seed_version          = storage.get('seed_version', NEW_SEED_VERSION)
 
         self.gap_limit             = storage.get('gap_limit', 5)
         self.use_change            = storage.get('use_change',True)
@@ -163,7 +172,6 @@ class Wallet:
         self.seed                  = storage.get('seed', '')               # encrypted
         self.labels                = storage.get('labels', {})
         self.frozen_addresses      = storage.get('frozen_addresses',[])
-        self.prioritized_addresses = storage.get('prioritized_addresses',[])
         self.addressbook           = storage.get('contacts', [])
 
         self.imported_keys         = storage.get('imported_keys',{})
@@ -176,13 +184,9 @@ class Wallet:
 
         self.next_addresses = storage.get('next_addresses',{})
 
-        if self.seed_version not in [4, 6]:
-            msg = "This wallet seed is not supported."
-            if self.seed_version in [5]:
-                msg += "\nTo open this wallet, try 'git checkout seed_v%d'"%self.seed_version
-                print msg
-                sys.exit(1)
 
+        # This attribute is set when wallet.start_threads is called.
+        self.synchronizer = None
 
         self.load_accounts()
 
@@ -191,7 +195,7 @@ class Wallet:
         for k,v in tx_list.items():
             try:
                 tx = Transaction(v)
-            except:
+            except Exception:
                 print_msg("Warning: Cannot deserialize transactions. skipping")
                 continue
 
@@ -255,11 +259,11 @@ class Wallet:
         seed = self.get_seed(password)
         try:
             address = address_from_private_key(sec)
-        except:
-            raise BaseException('Invalid private key')
+        except Exception:
+            raise Exception('Invalid private key')
 
         if self.is_mine(address):
-            raise BaseException('Address already in wallet')
+            raise Exception('Address already in wallet')
         
         # store the originally requested keypair into the imported keys table
         self.imported_keys[address] = pw_encode(sec, password )
@@ -284,92 +288,69 @@ class Wallet:
             # we keep only 13 words, that's approximately 139 bits of entropy
             words = mnemonic.mn_encode(s)[0:13] 
             seed = ' '.join(words)
-            if mnemonic_hash(seed).startswith(SEED_PREFIX): 
-                break  # this removes 12 bits of entropy 
+            if is_seed(seed):
+                break  # this will remove 8 bits of entropy
             nonce += 1
 
         return seed
 
 
     def init_seed(self, seed):
-        import mnemonic
+        import mnemonic, unicodedata
         
         if self.seed: 
-            raise BaseException("a seed exists")
+            raise Exception("a seed exists")
+
+        self.seed_version = NEW_SEED_VERSION
 
         if not seed:
-            self.seed = random_seed(128)
-            self.seed_version = 4
+            self.seed = self.make_seed()
             return
 
-        #if not seed:
-        #    self.seed = self.make_seed()
-        #    self.seed_version = SEED_VERSION
-        #    return
+        self.seed = unicodedata.normalize('NFC', unicode(seed.strip()))
 
-        # find out what kind of wallet we are
-        try:
-            seed.decode('hex')
-            self.seed_version = 4
-            self.seed = str(seed)
-            return
-        except:
-            pass
-
-        words = seed.split()
-        self.seed_version = 4
-        self.seed = mnemonic.mn_decode(words)
-        
-        #try:
-        #    mnemonic.mn_decode(words)
-        #    uses_electrum_words = True
-        #except:
-        #    uses_electrum_words = False
-        #
-        #if uses_electrum_words and len(words) != 13:
-        #    self.seed_version = 4
-        #    self.seed = mnemonic.mn_decode(words)
-        #else:
-        #    assert mnemonic_hash(seed).startswith(SEED_PREFIX)
-        #    self.seed_version = SEED_VERSION
-        #    self.seed = seed
             
 
-    def save_seed(self):
+    def save_seed(self, password):
+        if password: 
+            self.seed = pw_encode( self.seed, password)
+            self.use_encryption = True
         self.storage.put('seed', self.seed, True)
         self.storage.put('seed_version', self.seed_version, True)
+        self.storage.put('use_encryption', self.use_encryption,True)
+        self.create_accounts(password)
+
 
-    def create_watching_only_wallet(self, c0, K0):
-        cK0 = ""
+    def create_watching_only_wallet(self, K0, c0):
+        cK0 = "" #FIXME
         self.master_public_keys = {
             "m/0'/": (c0, K0, cK0),
             }
         self.storage.put('master_public_keys', self.master_public_keys, True)
-        self.create_account('1','Main account')
+        self.storage.put('seed_version', self.seed_version, True)
+        self.create_account('1of1','Main account')
 
 
-    def create_accounts(self): 
-        if self.seed_version == 4:
-            self.create_old_account()
-        else:
-            # create default account
-            self.create_master_keys('1')
-            self.create_account('1','Main account')
+    def create_accounts(self, password):
+        seed = pw_decode(self.seed, password)
+        # create default account
+        self.create_master_keys('1of1', password)
+        self.create_account('1of1','Main account')
 
 
-    def create_master_keys(self, account_type):
-        master_k, master_c, master_K, master_cK = bip32_init(self.get_seed(None))
-        if account_type == '1':
+    def create_master_keys(self, account_type, password):
+        master_k, master_c, master_K, master_cK = bip32_init(self.get_seed(password))
+        if account_type == '1of1':
             k0, c0, K0, cK0 = bip32_private_derivation(master_k, master_c, "m/", "m/0'/")
             self.master_public_keys["m/0'/"] = (c0, K0, cK0)
-            self.master_private_keys["m/0'/"] = k0
+            self.master_private_keys["m/0'/"] = pw_encode(k0, password)
         elif account_type == '2of2':
             k1, c1, K1, cK1 = bip32_private_derivation(master_k, master_c, "m/", "m/1'/")
             k2, c2, K2, cK2 = bip32_private_derivation(master_k, master_c, "m/", "m/2'/")
             self.master_public_keys["m/1'/"] = (c1, K1, cK1)
             self.master_public_keys["m/2'/"] = (c2, K2, cK2)
-            self.master_private_keys["m/1'/"] = k1
-            self.master_private_keys["m/2'/"] = k2
+            self.master_private_keys["m/1'/"] = pw_encode(k1, password)
+            self.master_private_keys["m/2'/"] = pw_encode(k2, password)
         elif account_type == '2of3':
             k3, c3, K3, cK3 = bip32_private_derivation(master_k, master_c, "m/", "m/3'/")
             k4, c4, K4, cK4 = bip32_private_derivation(master_k, master_c, "m/", "m/4'/")
@@ -377,15 +358,15 @@ class Wallet:
             self.master_public_keys["m/3'/"] = (c3, K3, cK3)
             self.master_public_keys["m/4'/"] = (c4, K4, cK4)
             self.master_public_keys["m/5'/"] = (c5, K5, cK5)
-            self.master_private_keys["m/3'/"] = k3
-            self.master_private_keys["m/4'/"] = k4
-            self.master_private_keys["m/5'/"] = k5
+            self.master_private_keys["m/3'/"] = pw_encode(k3, password)
+            self.master_private_keys["m/4'/"] = pw_encode(k4, password)
+            self.master_private_keys["m/5'/"] = pw_encode(k5, password)
 
         self.storage.put('master_public_keys', self.master_public_keys, True)
         self.storage.put('master_private_keys', self.master_private_keys, True)
 
     def has_master_public_keys(self, account_type):
-        if account_type == '1':
+        if account_type == '1of1':
             return "m/0'/" in self.master_public_keys
         elif account_type == '2of2':
             return set(["m/1'/", "m/2'/"]) <= set(self.master_public_keys.keys())
@@ -408,24 +389,25 @@ class Wallet:
 
     def deseed_branch(self, k):
         # check that parent has no seed
-        assert self.seed == ''
+        # assert self.seed == ''
         self.master_private_keys.pop(k)
         self.storage.put('master_private_keys', self.master_private_keys, True)
 
+
     def is_watching_only(self):
         return (self.seed == '') and (self.master_private_keys == {})
 
 
 
     def account_id(self, account_type, i):
-        if account_type == '1':
+        if account_type == '1of1':
             return "m/0'/%d"%i
         elif account_type == '2of2':
             return "m/1'/%d & m/2'/%d"%(i,i)
         elif account_type == '2of3':
             return "m/3'/%d & m/4'/%d & m/5'/%d"%(i,i,i)
         else:
-            raise BaseException('unknown account type')
+            raise Exception('unknown account type')
 
 
     def num_accounts(self, account_type):
@@ -438,7 +420,7 @@ class Wallet:
         return i
 
 
-    def new_account_address(self, account_type = '1'):
+    def new_account_address(self, account_type = '1of1'):
         i = self.num_accounts(account_type)
         k = self.account_id(account_type,i)
 
@@ -452,12 +434,12 @@ class Wallet:
         return k, addr
 
 
-    def next_account(self, account_type = '1'):
+    def next_account(self, account_type = '1of1'):
 
         i = self.num_accounts(account_type)
         account_id = self.account_id(account_type,i)
 
-        if account_type is '1':
+        if account_type is '1of1':
             master_c0, master_K0, _ = self.master_public_keys["m/0'/"]
             c0, K0, cK0 = bip32_public_derivation(master_c0.decode('hex'), master_K0.decode('hex'), "m/0'/", "m/0'/%d"%i)
             account = BIP32_Account({ 'c':c0, 'K':K0, 'cK':cK0 })
@@ -501,7 +483,7 @@ class Wallet:
 
 
 
-    def create_account(self, account_type = '1', name = None):
+    def create_account(self, account_type = '1of1', name = None):
         k, account = self.next_account(account_type)
         if k in self.pending_accounts:
             self.pending_accounts.pop(k)
@@ -513,13 +495,6 @@ class Wallet:
             self.set_label(k, name)
 
 
-    def create_old_account(self):
-        mpk = OldAccount.mpk_from_seed(self.seed)
-        self.storage.put('master_public_key', mpk, True)
-        self.accounts[0] = OldAccount({'mpk':mpk, 0:[], 1:[]})
-        self.save_accounts()
-
-
     def save_accounts(self):
         d = {}
         for k, v in self.accounts.items():
@@ -584,20 +559,19 @@ class Wallet:
         return s[0] == 1
 
     def get_master_public_key(self):
-        if self.seed_version == 4:
-            return self.storage.get("master_public_key")
-        else:
-            c, K, cK = self.storage.get("master_public_keys")["m/0'/"]
-            return repr((c, K))
+        c, K, cK = self.storage.get("master_public_keys")["m/0'/"]
+        return repr((c, K))
 
     def get_master_private_key(self, account, password):
-        master_k = pw_decode( self.master_private_keys[account], password)
+        k = self.master_private_keys.get(account)
+        if not k: return
+        master_k = pw_decode( k, password)
         master_c, master_K, master_Kc = self.master_public_keys[account]
         try:
             K, Kc = get_pubkeys_from_secret(master_k.decode('hex'))
             assert K.encode('hex') == master_K
-        except:
-            raise BaseException("Invalid password")
+        except Exception:
+            raise Exception("Invalid password")
         return master_k
 
 
@@ -616,7 +590,15 @@ class Wallet:
             if v == address:
                 return k, (0,0)
 
-        raise BaseException("Address not found", address)
+        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)
+        if account != -1:
+            a = self.accounts[account]
+            return a.get_pubkeys( sequence )
 
 
     def get_roots(self, account):
@@ -650,7 +632,9 @@ class Wallet:
 
     def get_keyID(self, account, sequence):
         if account == 0:
-            return 'old'
+            a, b = sequence
+            mpk = self.storage.get('master_public_key')
+            return 'old(%s,%d,%d)'%(mpk,a,b)
 
         rs = self.rebase_sequence(account, sequence)
         dd = []
@@ -661,35 +645,29 @@ class Wallet:
         return '&'.join(dd)
 
 
-
     def get_seed(self, password):
         s = pw_decode(self.seed, password)
-        if self.seed_version == 4:
-            seed = s
-        else:
-            seed = mnemonic_hash(s)
-        #todo:  #self.sequences[0].check_seed(seed)
+        seed = mnemonic_to_seed(s,'').encode('hex')
         return seed
-        
 
-    def get_mnemonic(self, password):
-        import mnemonic
-        s = pw_decode(self.seed, password)
-        if self.seed_version == 4:
-            return ' '.join(mnemonic.mn_encode(s))
-        else:
-            return s
 
+    def get_mnemonic(self, password):
+        return pw_decode(self.seed, password)
         
 
     def get_private_key(self, address, password):
+        if self.is_watching_only():
+            return []
+
+        # first check the provided password
+        seed = self.get_seed(password)
+        
         out = []
         if address in self.imported_keys.keys():
             out.append( pw_decode( self.imported_keys[address], password ) )
         else:
             account, sequence = self.get_address_index(address)
             if account == 0:
-                seed = self.get_seed(password)
                 pk = self.accounts[account].get_private_key(seed, sequence)
                 out.append(pk)
                 return out
@@ -710,13 +688,20 @@ class Wallet:
     def add_keypairs_from_wallet(self, tx, keypairs, password):
         for txin in tx.inputs:
             address = txin['address']
+            if not self.is_mine(address):
+                continue
             private_keys = self.get_private_key(address, password)
             for sec in private_keys:
                 pubkey = public_key_from_private_key(sec)
                 keypairs[ pubkey ] = sec
+                if address in self.imported_keys.keys():
+                    txin['redeemPubkey'] = pubkey
 
 
     def add_keypairs_from_KeyID(self, tx, keypairs, password):
+        # first check the provided password
+        seed = self.get_seed(password)
+
         for txin in tx.inputs:
             keyid = txin.get('KeyID')
             if keyid:
@@ -794,6 +779,16 @@ class Wallet:
         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)
+        secret = keys[0]
+        ec = regenerate_key(secret)
+        decrypted = ec.decrypt_message(message)
+        return decrypted[0]
+
+
     def change_gap_limit(self, value):
         if value >= self.gap_limit:
             self.gap_limit = value
@@ -878,7 +873,7 @@ class Wallet:
 
 
     def create_pending_accounts(self):
-        for account_type in ['1','2of2','2of3']:
+        for account_type in ['1of1','2of2','2of3']:
             if not self.has_master_public_keys(account_type):
                 continue
             k, a = self.new_account_address(account_type)
@@ -943,7 +938,7 @@ class Wallet:
 
     def get_address_flags(self, addr):
         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 "P" if addr in self.prioritized_addresses else "-"
+        flags += "F" if addr in self.frozen_addresses else "-"
         return flags
         
 
@@ -1007,29 +1002,23 @@ class Wallet:
 
 
     def get_account_name(self, k):
-        if k == 0:
-            if self.seed_version == 4: 
-                name = 'Main account'
+        default = "Unnamed account"
+        m = re.match("m/0'/(\d+)", k)
+        if m:
+            num = m.group(1)
+            if num == '0':
+                default = "Main account"
             else:
-                name = 'Old account'
-        else:
-            default = "Unnamed account"
-            m = re.match("m/0'/(\d+)", k)
-            if m:
-                num = m.group(1)
-                if num == '0':
-                    default = "Main account"
-                else:
-                    default = "Account %s"%num
+                default = "Account %s"%num
                     
-            m = re.match("m/1'/(\d+) & m/2'/(\d+)", k)
-            if m:
-                num = m.group(1)
-                default = "2of2 account %s"%num
-            name = self.labels.get(k, default)
-
+        m = re.match("m/1'/(\d+) & m/2'/(\d+)", k)
+        if m:
+            num = m.group(1)
+            default = "2of2 account %s"%num
+        name = self.labels.get(k, default)
         return name
 
+
     def get_account_names(self):
         accounts = {}
         for k, account in self.accounts.items():
@@ -1038,6 +1027,7 @@ class Wallet:
             accounts[-1] = 'Imported keys'
         return accounts
 
+
     def get_account_addresses(self, a, include_change=True):
         if a is None:
             o = self.addresses(True)
@@ -1076,9 +1066,10 @@ class Wallet:
             if h == ['*']: continue
             for tx_hash, tx_height in h:
                 tx = self.transactions.get(tx_hash)
-                if tx is None: raise BaseException("Wallet not synchronized")
+                if tx is None: raise Exception("Wallet not synchronized")
                 is_coinbase = tx.inputs[0].get('prevout_hash') == '0'*64
-                for output in tx.d.get('outputs'):
+                for o in tx.d.get('outputs'):
+                    output = o.copy()
                     if output.get('address') != addr: continue
                     key = tx_hash + ":%d" % output.get('prevout_n')
                     if key in self.spent_outputs: continue
@@ -1096,13 +1087,7 @@ class Wallet:
         return [x[1] for x in coins]
 
 
-
-    def choose_tx_inputs_from_account( self, amount, fixed_fee, account ):
-        domain = self.get_account_addresses(account) if account else None
-        return self.choose_tx_inputs( amount, fixed_fee, domain )
-
-
-    def choose_tx_inputs( self, amount, fixed_fee, domain = None ):
+    def choose_tx_inputs( self, amount, fixed_fee, num_outputs, domain = None ):
         """ todo: minimize tx size """
         total = 0
         fee = self.fee if fixed_fee is None else fixed_fee
@@ -1112,26 +1097,17 @@ class Wallet:
         for i in self.frozen_addresses:
             if i in domain: domain.remove(i)
 
-        prioritized = []
-        for i in self.prioritized_addresses:
-            if i in domain:
-                domain.remove(i)
-                prioritized.append(i)
-
         coins = self.get_unspent_coins(domain)
-        prioritized_coins = self.get_unspent_coins(prioritized)
-
         inputs = []
-        coins = prioritized_coins + coins
 
         for item in coins:
-            if item.get('coinbase') and item.get('height') + COINBASE_MATURITY > self.network.blockchain.height:
+            if item.get('coinbase') and item.get('height') + COINBASE_MATURITY > self.network.blockchain.height():
                 continue
             addr = item.get('address')
             v = item.get('value')
             total += v
             inputs.append(item)
-            fee = self.estimated_fee(inputs) if fixed_fee is None else fixed_fee
+            fee = self.estimated_fee(inputs, num_outputs) if fixed_fee is None else fixed_fee
             if total >= amount + fee: break
         else:
             inputs = []
@@ -1144,17 +1120,16 @@ class Wallet:
             self.fee = fee
             self.storage.put('fee_per_kb', self.fee, True)
         
-    def estimated_fee(self, inputs):
-        estimated_size =  len(inputs) * 180 + 80     # this assumes non-compressed keys
-        fee = self.fee * int(round(estimated_size/1024.))
-        if fee == 0: fee = self.fee
+    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 )
-        if change_amount != 0:
+        if change_amount > DUST_THRESHOLD:
             if not change_addr:
 
                 # send change to one of the accounts involved in the tx
@@ -1211,7 +1186,7 @@ class Wallet:
     def receive_history_callback(self, addr, hist):
 
         if not self.check_new_history(addr, hist):
-            raise BaseException("error: received history for %s is not consistent with known transactions"%addr)
+            raise Exception("error: received history for %s is not consistent with known transactions"%addr)
             
         with self.lock:
             self.history[addr] = hist
@@ -1225,6 +1200,9 @@ class Wallet:
 
 
     def get_tx_history(self, account=None):
+        if not self.verifier:
+            return []
+
         with self.transaction_lock:
             history = self.transactions.items()
             history.sort(key = lambda x: self.verifier.get_txpos(x[0]))
@@ -1302,9 +1280,9 @@ class Wallet:
 
     def make_unsigned_transaction(self, outputs, fee=None, change_addr=None, domain=None ):
         for address, x in outputs:
-            assert is_valid(address)
+            assert is_valid(address), "Address " + address + " is invalid!"
         amount = sum( map(lambda x:x[1], outputs) )
-        inputs, total, fee = self.choose_tx_inputs( amount, fee, domain )
+        inputs, total, fee = self.choose_tx_inputs( amount, fee, len(outputs), domain )
         if not inputs:
             raise ValueError("Not enough funds")
         self.add_input_info(inputs)
@@ -1312,11 +1290,6 @@ class Wallet:
         return Transaction.from_io(inputs, outputs)
 
 
-    def mktx_from_account(self, outputs, password, fee=None, account=None):
-        domain = self.get_account_addresses(account) if account else None
-        return self.mktx(outputs, password, fee, change_addr=None, domain=domain)
-
-
     def mktx(self, outputs, password, fee=None, change_addr=None, domain= None ):
         tx = self.make_unsigned_transaction(outputs, fee, change_addr, domain)
         keypairs = {}
@@ -1349,7 +1322,7 @@ class Wallet:
         # synchronous
         h = self.send_tx(tx)
         self.tx_event.wait()
-        return self.receive_tx(h)
+        return self.receive_tx(h, tx)
 
     def send_tx(self, tx):
         # asynchronous
@@ -1361,18 +1334,18 @@ class Wallet:
         self.tx_result = r.get('result')
         self.tx_event.set()
 
-    def receive_tx(self,tx_hash):
+    def receive_tx(self, tx_hash, tx):
         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 == '': new_password = None
-        # this will throw an exception if unicode cannot be converted
-        decoded = pw_decode(self.seed, old_password)
+        decoded = self.get_seed(old_password)
         self.seed = pw_encode( decoded, new_password)
         self.storage.put('seed', self.seed, True)
         self.use_encryption = (new_password != None)
@@ -1393,7 +1366,6 @@ class Wallet:
 
     def freeze(self,addr):
         if self.is_mine(addr) and addr not in self.frozen_addresses:
-            self.unprioritize(addr)
             self.frozen_addresses.append(addr)
             self.storage.put('frozen_addresses', self.frozen_addresses, True)
             return True
@@ -1408,23 +1380,6 @@ class Wallet:
         else:
             return False
 
-    def prioritize(self,addr):
-        if self.is_mine(addr) and addr not in self.prioritized_addresses:
-            self.unfreeze(addr)
-            self.prioritized_addresses.append(addr)
-            self.storage.put('prioritized_addresses', self.prioritized_addresses, True)
-            return True
-        else:
-            return False
-
-    def unprioritize(self,addr):
-        if self.is_mine(addr) and addr in self.prioritized_addresses:
-            self.prioritized_addresses.remove(addr)
-            self.storage.put('prioritized_addresses', self.prioritized_addresses, True)
-            return True
-        else:
-            return False
-
 
     def set_verifier(self, verifier):
         self.verifier = verifier
@@ -1529,16 +1484,20 @@ class Wallet:
     def start_threads(self, network):
         from verifier import TxVerifier
         self.network = network
-        self.verifier = TxVerifier(self.network, self.storage)
-        self.verifier.start()
-        self.set_verifier(self.verifier)
-        self.synchronizer = WalletSynchronizer(self, network)
-        self.synchronizer.start()
+        if self.network is not None:
+            self.verifier = TxVerifier(self.network, self.storage)
+            self.verifier.start()
+            self.set_verifier(self.verifier)
+            self.synchronizer = WalletSynchronizer(self, network)
+            self.synchronizer.start()
+        else:
+            self.verifier = None
+            self.synchronizer =None
 
     def stop_threads(self):
-        self.verifier.stop()
-        self.synchronizer.stop()
-
+        if self.network:
+            self.verifier.stop()
+            self.synchronizer.stop()
 
 
     def restore(self, callback):
@@ -1549,24 +1508,27 @@ class 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,))
                 time.sleep(0.1)
 
         def wait_for_network():
-            while not self.network.interface.is_connected:
+            while not self.network.is_connected():
                 msg = "%s \n" % (_("Connecting..."))
                 apply(callback, (msg,))
                 time.sleep(0.1)
 
         # wait until we are connected, because the user might have selected another server
-        wait_for_network()
-
-
-        self.create_accounts()
-        wait_for_wallet()
+        if self.network:
+            wait_for_network()
+            wait_for_wallet()
+        else:
+            self.synchronize()
+            
+        self.fill_addressbook()
 
 
 
@@ -1603,17 +1565,16 @@ class WalletSynchronizer(threading.Thread):
             self.running = True
 
         while self.is_running():
-            
+
             if not self.network.is_connected():
-                print_error("synchronizer: waiting for interface")
                 self.network.wait_until_connected()
                 
-            self.run_interface(self.network.interface)
+            self.run_interface()
 
 
-    def run_interface(self, interface):
+    def run_interface(self):
 
-        print_error("synchronizer: connected to", interface.server)
+        print_error("synchronizer: connected to", self.network.main_server())
 
         requested_tx = []
         missing_tx = []
@@ -1643,12 +1604,12 @@ class WalletSynchronizer(threading.Thread):
             # request missing transactions
             for tx_hash, tx_height in missing_tx:
                 if (tx_hash, tx_height) not in requested_tx:
-                    interface.send([ ('blockchain.transaction.get',[tx_hash, tx_height]) ], lambda i,r: self.queue.put(r))
+                    self.network.send([ ('blockchain.transaction.get',[tx_hash, tx_height]) ], lambda i,r: self.queue.put(r))
                     requested_tx.append( (tx_hash, tx_height) )
             missing_tx = []
 
             # detect if situation has changed
-            if interface.is_up_to_date() and self.queue.empty():
+            if self.network.is_up_to_date() and self.queue.empty():
                 if not self.wallet.is_up_to_date():
                     self.wallet.set_up_to_date(True)
                     self.was_updated = True
@@ -1658,7 +1619,7 @@ class WalletSynchronizer(threading.Thread):
                     self.was_updated = True
 
             if self.was_updated:
-                self.wallet.network.trigger_callback('updated')
+                self.network.trigger_callback('updated')
                 self.was_updated = False
 
             # 2. get a response
@@ -1667,8 +1628,9 @@ class WalletSynchronizer(threading.Thread):
             except Queue.Empty:
                 continue
 
-            if interface != self.network.interface:
-                break
+            # see if it changed
+            #if interface != self.network.interface:
+            #    break
             
             if not r:
                 continue
@@ -1686,7 +1648,7 @@ class WalletSynchronizer(threading.Thread):
                 addr = params[0]
                 if self.wallet.get_status(self.wallet.get_history(addr)) != result:
                     if requested_histories.get(addr) is None:
-                        interface.send([('blockchain.address.get_history', [addr])], lambda i,r:self.queue.put(r))
+                        self.network.send([('blockchain.address.get_history', [addr])], lambda i,r:self.queue.put(r))
                         requested_histories[addr] = result
 
             elif method == 'blockchain.address.get_history':
@@ -1706,12 +1668,12 @@ class WalletSynchronizer(threading.Thread):
                             hist.append( (tx_hash, item['height']) )
 
                     if len(hist) != len(result):
-                        raise BaseException("error: server sent history with non-unique txid", result)
+                        raise Exception("error: server sent history with non-unique txid", result)
 
                     # check that the status corresponds to what was announced
                     rs = requested_histories.pop(addr)
                     if self.wallet.get_status(hist) != rs:
-                        raise BaseException("error: status mismatch: %s"%addr)
+                        raise Exception("error: status mismatch: %s"%addr)
                 
                     # store received history
                     self.wallet.receive_history_callback(addr, hist)
@@ -1736,7 +1698,180 @@ class WalletSynchronizer(threading.Thread):
                 print_error("Error: Unknown message:" + method + ", " + repr(params) + ", " + repr(result) )
 
             if self.was_updated and not requested_tx:
-                self.wallet.network.trigger_callback('updated')
-                self.wallet.network.trigger_callback("new_transaction") # Updated gets called too many times from other places as well; if we use that signal we get the notification three times
-
+                self.network.trigger_callback('updated')
+                # Updated gets called too many times from other places as well; if we use that signal we get the notification three times
+                self.network.trigger_callback("new_transaction") 
                 self.was_updated = False
+
+
+
+
+class OldWallet(NewWallet):
+
+    def init_seed(self, seed):
+        import mnemonic
+        
+        if self.seed: 
+            raise Exception("a seed exists")
+
+        if not seed:
+            seed = random_seed(128)
+
+        self.seed_version = OLD_SEED_VERSION
+
+        # see if seed was entered as hex
+        seed = seed.strip()
+        try:
+            assert seed
+            seed.decode('hex')
+            self.seed = str(seed)
+            return
+        except Exception:
+            pass
+
+        words = seed.split()
+        try:
+            mnemonic.mn_decode(words)
+        except Exception:
+            raise
+
+        self.seed = mnemonic.mn_decode(words)
+
+        if not self.seed:
+            raise Exception("Invalid seed")
+            
+
+
+    def get_master_public_key(self):
+        return self.storage.get("master_public_key")
+
+    def create_accounts(self, password):
+        seed = pw_decode(self.seed, password)
+        mpk = OldAccount.mpk_from_seed(seed)
+        self.create_account(mpk)
+
+    def create_account(self, mpk):
+        self.storage.put('master_public_key', mpk, True)
+        self.accounts[0] = OldAccount({'mpk':mpk, 0:[], 1:[]})
+        self.save_accounts()
+
+    def create_watching_only_wallet(self, K0):
+        self.seed_version = OLD_SEED_VERSION
+        self.storage.put('seed_version', self.seed_version, True)
+        self.create_account(K0)
+
+    def get_seed(self, password):
+        seed = pw_decode(self.seed, password)
+        self.accounts[0].check_seed(seed)
+        return seed
+
+    def get_mnemonic(self, password):
+        import mnemonic
+        s = pw_decode(self.seed, password)
+        return ' '.join(mnemonic.mn_encode(s))
+
+
+    def add_keypairs_from_KeyID(self, tx, keypairs, password):
+        # first check the provided password
+        seed = self.get_seed(password)
+        for txin in tx.inputs:
+            keyid = txin.get('KeyID')
+            if keyid:
+                m = re.match("old\(([0-9a-f]+),(\d+),(\d+)", keyid)
+                if not m: continue
+                mpk = m.group(1)
+                if mpk != self.storage.get('master_public_key'): continue 
+                for_change = int(m.group(2))
+                num = int(m.group(3))
+                account = self.accounts[0]
+                addr = account.get_address(for_change, num)
+                txin['address'] = addr # fixme: side effect
+                pk = account.get_private_key(seed, (for_change, num))
+                pubkey = public_key_from_private_key(pk)
+                keypairs[pubkey] = pk
+
+
+    def get_account_name(self, k):
+        assert k == 0
+        return 'Main account'
+
+
+
+
+# former WalletFactory
+class Wallet(object):
+
+    def __new__(self, storage):
+        config = storage.config
+        if config.get('bitkey', False):
+            # if user requested support for Bitkey device,
+            # import Bitkey driver
+            from wallet_bitkey import WalletBitkey
+            return WalletBitkey(config)
+
+        if not storage.file_exists:
+            seed_version = NEW_SEED_VERSION if config.get('bip32') is True else OLD_SEED_VERSION
+        else:
+            seed_version = storage.get('seed_version')
+
+        if seed_version == OLD_SEED_VERSION:
+            return OldWallet(storage)
+        elif seed_version == NEW_SEED_VERSION:
+            return NewWallet(storage)
+        else:
+            msg = "This wallet seed is not supported."
+            if seed_version in [5]:
+                msg += "\nTo open this wallet, try 'git checkout seed_v%d'"%seed_version
+            print msg
+            sys.exit(1)
+
+
+
+    @classmethod
+    def from_seed(self, seed, storage):
+        import mnemonic
+        if not seed:
+            return 
+
+        words = seed.strip().split()
+        try:
+            mnemonic.mn_decode(words)
+            uses_electrum_words = True
+        except Exception:
+            uses_electrum_words = False
+
+        try:
+            seed.decode('hex')
+            is_hex = True
+        except Exception:
+            is_hex = False
+         
+        if is_hex or (uses_electrum_words and len(words) != 13):
+            print "old style wallet", len(words), words
+            w = OldWallet(storage)
+            w.init_seed(seed) #hex
+        else:
+            #assert is_seed(seed)
+            w = NewWallet(storage)
+            w.init_seed(seed)
+
+        return w
+
+
+    @classmethod
+    def from_mpk(self, s, storage):
+        try:
+            mpk, chain = s.split(':')
+        except:
+            mpk = s
+            chain = False
+
+        if chain:
+            w = NewWallet(storage)
+            w.create_watching_only_wallet(mpk, chain)
+        else:
+            w = OldWallet(storage)
+            w.seed = ''
+            w.create_watching_only_wallet(mpk)
+
+        return w