commands: change API of "make_seed" and "create" commands

instead of "segwit" boolean, take a "seed_type" optional arg
default seed_type to "segwit"
previously these commands created legacy seeds by defalt

electrum/commands.py

@@ -132,7 +132,7 @@ class Commands:
         return ' '.join(sorted(known_commands.keys()))
 
     @command('')
-    def create(self, passphrase=None, password=None, encrypt_file=True, segwit=False):
+    def create(self, passphrase=None, password=None, encrypt_file=True, seed_type=None):
         """Create a new wallet.
         If you want to be prompted for an argument, type '?' or ':' (concealed)
         """
@@ -140,7 +140,7 @@ class Commands:
                               passphrase=passphrase,
                               password=password,
                               encrypt_file=encrypt_file,
-                              segwit=segwit)
+                              seed_type=seed_type)
         return {
             'seed': d['seed'],
             'path': d['wallet'].storage.path,
@@ -203,11 +203,10 @@ class Commands:
         return True
 
     @command('')
-    def make_seed(self, nbits=132, language=None, segwit=False):
+    def make_seed(self, nbits=132, language=None, seed_type=None):
         """Create a seed"""
         from .mnemonic import Mnemonic
-        t = 'segwit' if segwit else 'standard'
-        s = Mnemonic(language).make_seed(t, nbits)
+        s = Mnemonic(language).make_seed(seed_type, num_bits=nbits)
         return s
 
     @command('n')
@@ -810,7 +809,7 @@ command_options = {
     'from_addr':   ("-F", "Source address (must be a wallet address; use sweep to spend from non-wallet address)."),
     'change_addr': ("-c", "Change address. Default is a spare address, or the source address if it's not in the wallet"),
     'nbits':       (None, "Number of bits of entropy"),
-    'segwit':      (None, "Create segwit seed"),
+    'seed_type':   (None, "The type of seed to create, e.g. 'standard' or 'segwit'"),
     'language':    ("-L", "Default language for wordlist"),
     'passphrase':  (None, "Seed extension"),
     'privkey':     (None, "Private key. Set to '?' to get a prompt."),

electrum/mnemonic.py

@@ -160,7 +160,9 @@ class Mnemonic(Logger):
             i = i*n + k
         return i
 
-    def make_seed(self, seed_type='standard', num_bits=132):
+    def make_seed(self, seed_type=None, *, num_bits=132):
+        if seed_type is None:
+            seed_type = 'segwit'
         prefix = version.seed_prefix(seed_type)
         # increase num_bits in order to obtain a uniform distribution for the last word
         bpw = math.log(len(self.wordlist), 2)

electrum/tests/test_mnemonic.py

@@ -120,7 +120,7 @@ class Test_NewMnemonic(SequentialTestCase):
         iters = 10
         m = mnemonic.Mnemonic(lang='en')
         for _ in range(iters):
-            seed = m.make_seed()
+            seed = m.make_seed("standard")
             i = m.mnemonic_decode(seed)
             self.assertEqual(m.mnemonic_encode(i), seed)
 

electrum/tests/test_wallet.py

@@ -156,7 +156,6 @@ class TestCreateRestoreWallet(WalletTestCase):
                               passphrase=passphrase,
                               password=password,
                               encrypt_file=encrypt_file,
-                              segwit=True,
                               gap_limit=1)
         wallet = d['wallet']  # type: Standard_Wallet
         wallet.check_password(password)

electrum/version.py

@@ -19,3 +19,4 @@ def seed_prefix(seed_type):
         return SEED_PREFIX_2FA
     elif seed_type == '2fa_segwit':
         return SEED_PREFIX_2FA_SW
+    raise Exception(f"unknown seed_type: {seed_type}")

electrum/wallet.py

@@ -2005,13 +2005,12 @@ class Wallet(object):
         raise WalletFileException("Unknown wallet type: " + str(wallet_type))
 
 
-def create_new_wallet(*, path, passphrase=None, password=None, encrypt_file=True, segwit=True, gap_limit=None):
+def create_new_wallet(*, path, passphrase=None, password=None, encrypt_file=True, seed_type=None, gap_limit=None):
     """Create a new wallet"""
     storage = WalletStorage(path)
     if storage.file_exists():
         raise Exception("Remove the existing wallet first!")
 
-    seed_type = 'segwit' if segwit else 'standard'
     seed = Mnemonic('en').make_seed(seed_type)
     k = keystore.from_seed(seed, passphrase)
     storage.put('keystore', k.dump())