Handle None enter_seed_callback() response

scripts/joinmarket-qt.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-from typing import Optional
 
 '''
 Joinmarket GUI using PyQt for doing coinjoins.
@@ -23,6 +22,7 @@ Some widgets copied and modified from https://github.com/spesmilo/electrum
 import sys, datetime, os, logging
 import platform, json, threading, time
 from optparse import OptionParser
+from typing import Optional, Tuple
 
 from PySide2 import QtCore
 
@@ -1921,7 +1921,7 @@ class JMMainWindow(QMainWindow):
                        "Private keys exported to: " + os.path.join(jm_single().datadir,
                         privkeys_fn) + '.json', title="Success")
 
-    def seedEntry(self):
+    def seedEntry(self) -> Tuple[Optional[str], Optional[str]]:
         d = QDialog(self)
         d.setModal(1)
         d.setWindowTitle('Recover from mnemonic phrase')
@@ -2230,7 +2230,7 @@ class JMMainWindow(QMainWindow):
                            mbtype='info',
                            title="Error")
 
-    def getPassword(self):
+    def getPassword(self) -> str:
         pd = PasswordDialog()
         while True:
             for child in pd.findChildren(QLineEdit):
@@ -2255,7 +2255,7 @@ class JMMainWindow(QMainWindow):
         self.textpassword = str(pd.new_pw.text())
         return self.textpassword.encode('utf-8')
 
-    def getWalletFileName(self):
+    def getWalletFileName(self) -> str:
         walletname, ok = QInputDialog.getText(self, 'Choose wallet name',
                                               'Enter wallet file name:',
                                               QLineEdit.Normal, "wallet.jmdat")
@@ -2267,7 +2267,7 @@ class JMMainWindow(QMainWindow):
         self.walletname = str(walletname)
         return self.walletname
 
-    def displayWords(self, words, mnemonic_extension):
+    def displayWords(self, words: str, mnemonic_extension: str) -> None:
         mb = QMessageBox(self)
         seed_recovery_warning = [
             "WRITE DOWN THIS WALLET RECOVERY SEED.",
@@ -2282,13 +2282,13 @@ class JMMainWindow(QMainWindow):
         mb.setStandardButtons(QMessageBox.Ok)
         ret = mb.exec_()
 
-    def promptUseMnemonicExtension(self):
+    def promptUseMnemonicExtension(self) -> bool:
         msg = "Would you like to use a two-factor mnemonic recovery phrase?\nIf you don\'t know what this is press No."
         reply = QMessageBox.question(self, 'Use mnemonic extension?',
                     msg, QMessageBox.Yes, QMessageBox.No)
         return reply == QMessageBox.Yes
 
-    def promptInputMnemonicExtension(self):
+    def promptInputMnemonicExtension(self) -> Optional[str]:
         mnemonic_extension, ok = QInputDialog.getText(self,
                                      'Input Mnemonic Extension',
                                      'Enter mnemonic Extension:',

src/jmclient/wallet_utils.py

@@ -9,7 +9,7 @@ from optparse import OptionParser
 from numbers import Integral
 from collections import Counter, defaultdict
 from itertools import islice, chain
-from typing import Optional, Tuple
+from typing import Callable, Optional, Tuple
 from jmclient import (get_network, WALLET_IMPLEMENTATIONS, Storage, podle,
     jm_single, WalletError, BaseWallet, VolatileStorage,
     StoragePasswordError, is_segwit_mode, SegwitLegacyWallet, LegacyWallet,
@@ -673,25 +673,25 @@ def wallet_display(wallet_service, showprivkey, displayall=False,
     else:
         return walletview
 
-def cli_get_wallet_passphrase_check():
+def cli_get_wallet_passphrase_check() -> Optional[str]:
     password = get_password("Enter new passphrase to encrypt wallet: ")
     password2 = get_password("Reenter new passphrase to encrypt wallet: ")
     if password != password2:
         jmprint('ERROR. Passwords did not match', "error")
-        return False
+        return None
     return password
 
-def cli_get_wallet_file_name(defaultname="wallet.jmdat"):
+def cli_get_wallet_file_name(defaultname: str = "wallet.jmdat") -> str:
-    return input('Input wallet file name (default: ' + defaultname + '): ')
+    return input(f'Input wallet file name (default: {defaultname}): ')
 
-def cli_display_user_words(words, mnemonic_extension):
+def cli_display_user_words(words: str, mnemonic_extension: str) -> None:
     text = 'Write down this wallet recovery mnemonic\n\n' + words +'\n'
     if mnemonic_extension:
         text += '\nAnd this mnemonic extension: ' + mnemonic_extension.decode(
             'utf-8') + '\n'
     jmprint(text, "important")
 
-def cli_user_mnemonic_entry():
+def cli_user_mnemonic_entry() -> Tuple[Optional[str], Optional[str]]:
     mnemonic_phrase = input("Input mnemonic recovery phrase: ")
     mnemonic_extension = input("Input mnemonic extension, leave blank if there isnt one: ")
     if len(mnemonic_extension.strip()) == 0:
@@ -707,7 +707,7 @@ def cli_do_use_mnemonic_extension() -> bool:
         jmprint("Not using mnemonic extension", "info")
         return False #no mnemonic extension
 
-def cli_get_mnemonic_extension():
+def cli_get_mnemonic_extension() -> str:
     jmprint("Note: This will be stored in a reversible way. Do not reuse!",
             "info")
     return input("Enter mnemonic extension: ")
@@ -721,10 +721,17 @@ def cli_do_support_fidelity_bonds() -> bool:
         jmprint("Not supporting fidelity bonds", "info")
         return False
 
-def wallet_generate_recover_bip39(method, walletspath, default_wallet_name,
+def wallet_generate_recover_bip39(method: str,
-        display_seed_callback, enter_seed_callback, enter_wallet_password_callback,
+                                  walletspath: str,
-        enter_wallet_file_name_callback, enter_if_use_seed_extension,
+                                  default_wallet_name: str,
-        enter_seed_extension_callback, enter_do_support_fidelity_bonds, mixdepth=DEFAULT_MIXDEPTH):
+                                  display_seed_callback: Callable[[str, str], None],
+                                  enter_seed_callback: Optional[Callable[[], Tuple[Optional[str], Optional[str]]]],
+                                  enter_wallet_password_callback: Callable[[], str],
+                                  enter_wallet_file_name_callback: Callable[[], str],
+                                  enter_if_use_seed_extension: Optional[Callable[[], bool]],
+                                  enter_seed_extension_callback: Optional[Callable[[], Optional[str]]],
+                                  enter_do_support_fidelity_bonds: Callable[[], bool],
+                                  mixdepth: int = DEFAULT_MIXDEPTH) -> bool:
     entropy = None
     mnemonic_extension = None
     if method == "generate":
@@ -734,10 +741,10 @@ def wallet_generate_recover_bip39(method, walletspath, default_wallet_name,
                 return False
     elif method == 'recover':
         words, mnemonic_extension = enter_seed_callback()
-        words = words.strip()
+        words = words and words.strip()
-        mnemonic_extension = mnemonic_extension and mnemonic_extension.strip()
         if not words:
             return False
+        mnemonic_extension = mnemonic_extension and mnemonic_extension.strip()
         try:
             entropy = SegwitLegacyWallet.entropy_from_mnemonic(words)
         except WalletError: