qml: don't initialize instance variables on class scope for non-singletons

(this somehow escaped attention before, as most objects usually don't have multiple instances,
unless multiple wallets are open at the same time.)
Also, move all signal declarations, class constants and variables to the top of class definitions.

electrum/gui/qml/plugins.py

@@ -10,10 +10,11 @@ class PluginQObject(QObject):
     busyChanged = pyqtSignal()
     pluginEnabledChanged = pyqtSignal()
 
-    _busy = False
-
     def __init__(self, plugin, parent):
         super().__init__(parent)
+
+        self._busy = False
+
         self.plugin = plugin
         self.app = parent
 

electrum/gui/qml/qeaddressdetails.py

@@ -8,27 +8,27 @@ from .qewallet import QEWallet
 
 
 class QEAddressDetails(QObject):
-    def __init__(self, parent=None):
-        super().__init__(parent)
-
     _logger = get_logger(__name__)
 
-    _wallet = None
+    detailsChanged = pyqtSignal()
-    _address = None
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
 
-    _label = None
+        self._wallet = None
-    _frozen = False
+        self._address = None
-    _scriptType = None
-    _status = None
-    _balance = QEAmount()
-    _pubkeys = None
-    _privkey = None
-    _derivationPath = None
-    _numtx = 0
 
-    _historyModel = None
+        self._label = None
+        self._frozen = False
+        self._scriptType = None
+        self._status = None
+        self._balance = QEAmount()
+        self._pubkeys = None
+        self._privkey = None
+        self._derivationPath = None
+        self._numtx = 0
 
-    detailsChanged = pyqtSignal()
+        self._historyModel = None
 
     walletChanged = pyqtSignal()
     @pyqtProperty(QEWallet, notify=walletChanged)

electrum/gui/qml/qeaddresslistmodel.py

@@ -13,12 +13,6 @@ if TYPE_CHECKING:
 
 
 class QEAddressListModel(QAbstractListModel):
-    def __init__(self, wallet: 'Abstract_Wallet', parent=None):
-        super().__init__(parent)
-        self.wallet = wallet
-        self.setDirty()
-        self.init_model()
-
     _logger = get_logger(__name__)
 
     # define listmodel rolemap
@@ -26,6 +20,12 @@ class QEAddressListModel(QAbstractListModel):
     _ROLE_KEYS = range(Qt.UserRole, Qt.UserRole + len(_ROLE_NAMES))
     _ROLE_MAP  = dict(zip(_ROLE_KEYS, [bytearray(x.encode()) for x in _ROLE_NAMES]))
 
+    def __init__(self, wallet: 'Abstract_Wallet', parent=None):
+        super().__init__(parent)
+        self.wallet = wallet
+        self.setDirty()
+        self.init_model()
+
     def rowCount(self, index):
         return len(self.receive_addresses) + len(self.change_addresses)
 

electrum/gui/qml/qebitcoin.py

@@ -15,10 +15,6 @@ from electrum.mnemonic import is_any_2fa_seed_type
 from .qetypes import QEAmount
 
 class QEBitcoin(QObject):
-    def __init__(self, config, parent=None):
-        super().__init__(parent)
-        self.config = config
-
     _logger = get_logger(__name__)
 
     generatedSeedChanged = pyqtSignal()
@@ -30,6 +26,10 @@ class QEBitcoin(QObject):
     validationMessageChanged = pyqtSignal()
     _validationMessage = ''
 
+    def __init__(self, config, parent=None):
+        super().__init__(parent)
+        self.config = config
+
     @pyqtProperty('QString', notify=generatedSeedChanged)
     def generated_seed(self):
         return self.generatedSeed

electrum/gui/qml/qechanneldetails.py

@@ -21,16 +21,17 @@ class QEChannelDetails(QObject, QtEventListener):
 
     Q_ENUMS(State)
 
-    _wallet = None
-    _channelid = None
-    _channel = None
-
     channelChanged = pyqtSignal()
     channelCloseSuccess = pyqtSignal()
     channelCloseFailed = pyqtSignal([str], arguments=['message'])
 
     def __init__(self, parent=None):
         super().__init__(parent)
+
+        self._wallet = None
+        self._channelid = None
+        self._channel = None
+
         self.register_callbacks()
         self.destroyed.connect(lambda: self.on_destroy())
 

electrum/gui/qml/qechannelopener.py

@@ -19,18 +19,8 @@ from .qewallet import QEWallet
 
 
 class QEChannelOpener(QObject, AuthMixin):
-    def __init__(self, parent=None):
-        super().__init__(parent)
-
     _logger = get_logger(__name__)
 
-    _wallet = None
-    _nodeid = None
-    _amount = QEAmount()
-    _valid = False
-    _opentx = None
-    _txdetails = None
-
     validationError = pyqtSignal([str,str], arguments=['code','message'])
     conflictingBackup = pyqtSignal([str], arguments=['message'])
     channelOpening = pyqtSignal([str], arguments=['peer'])
@@ -39,6 +29,16 @@ class QEChannelOpener(QObject, AuthMixin):
 
     dataChanged = pyqtSignal() # generic notify signal
 
+    def __init__(self, parent=None):
+        super().__init__(parent)
+
+        self._wallet = None
+        self._nodeid = None
+        self._amount = QEAmount()
+        self._valid = False
+        self._opentx = None
+        self._txdetails = None
+
     walletChanged = pyqtSignal()
     @pyqtProperty(QEWallet, notify=walletChanged)
     def wallet(self):

electrum/gui/qml/qeconfig.py

@@ -10,12 +10,12 @@ from .qetypes import QEAmount
 from .auth import AuthMixin, auth_protect
 
 class QEConfig(AuthMixin, QObject):
+    _logger = get_logger(__name__)
+
     def __init__(self, config, parent=None):
         super().__init__(parent)
         self.config = config
 
-    _logger = get_logger(__name__)
-
     autoConnectChanged = pyqtSignal()
     @pyqtProperty(bool, notify=autoConnectChanged)
     def autoConnect(self):

electrum/gui/qml/qedaemon.py

@@ -107,14 +107,8 @@ class QEWalletListModel(QAbstractListModel):
             i += 1
 
 class QEDaemon(AuthMixin, QObject):
-    def __init__(self, daemon, parent=None):
-        super().__init__(parent)
-        self.daemon = daemon
-        self.qefx = QEFX(daemon.fx, daemon.config)
-        self._walletdb = QEWalletDB()
-        self._walletdb.validPasswordChanged.connect(self.passwordValidityCheck)
-
     _logger = get_logger(__name__)
+
     _available_wallets = None
     _current_wallet = None
     _new_wallet_wizard = None
@@ -133,6 +127,13 @@ class QEDaemon(AuthMixin, QObject):
     walletOpenError = pyqtSignal([str], arguments=["error"])
     walletDeleteError = pyqtSignal([str,str], arguments=['code', 'message'])
 
+    def __init__(self, daemon, parent=None):
+        super().__init__(parent)
+        self.daemon = daemon
+        self.qefx = QEFX(daemon.fx, daemon.config)
+        self._walletdb = QEWalletDB()
+        self._walletdb.validPasswordChanged.connect(self.passwordValidityCheck)
+
     @pyqtSlot()
     def passwordValidityCheck(self):
         if not self._walletdb._validPassword:

electrum/gui/qml/qefx.py

@@ -12,6 +12,10 @@ from .qetypes import QEAmount
 from .util import QtEventListener, event_listener
 
 class QEFX(QObject, QtEventListener):
+    _logger = get_logger(__name__)
+
+    quotesUpdated = pyqtSignal()
+
     def __init__(self, fxthread: FxThread, config: SimpleConfig, parent=None):
         super().__init__(parent)
         self.fx = fxthread
@@ -19,10 +23,6 @@ class QEFX(QObject, QtEventListener):
         self.register_callbacks()
         self.destroyed.connect(lambda: self.on_destroy())
 
-    _logger = get_logger(__name__)
-
-    quotesUpdated = pyqtSignal()
-
     def on_destroy(self):
         self.unregister_callbacks()
 

electrum/gui/qml/qeinvoice.py

@@ -44,14 +44,14 @@ class QEInvoice(QObject):
 
     _logger = get_logger(__name__)
 
-    _wallet = None
-    _canSave = False
-    _canPay = False
-    _key = None
-
     def __init__(self, parent=None):
         super().__init__(parent)
 
+        self._wallet = None
+        self._canSave = False
+        self._canPay = False
+        self._key = None
+
     walletChanged = pyqtSignal()
     @pyqtProperty(QEWallet, notify=walletChanged)
     def wallet(self):
@@ -117,15 +117,8 @@ class QEInvoice(QObject):
         return self._wallet.wallet.lnworker.num_sats_can_send()
 
 class QEInvoiceParser(QEInvoice):
-
     _logger = get_logger(__name__)
 
-    _invoiceType = QEInvoice.Type.Invalid
-    _recipient = ''
-    _effectiveInvoice = None
-    _amount = QEAmount()
-    _userinfo = ''
-
     invoiceChanged = pyqtSignal()
     invoiceSaved = pyqtSignal([str], arguments=['key'])
 
@@ -140,6 +133,13 @@ class QEInvoiceParser(QEInvoice):
 
     def __init__(self, parent=None):
         super().__init__(parent)
+
+        self._invoiceType = QEInvoice.Type.Invalid
+        self._recipient = ''
+        self._effectiveInvoice = None
+        self._amount = QEAmount()
+        self._userinfo = ''
+
         self.clear()
 
     @pyqtProperty(int, notify=invoiceChanged)

electrum/gui/qml/qeinvoicelistmodel.py

@@ -13,11 +13,6 @@ from .qetypes import QEAmount
 class QEAbstractInvoiceListModel(QAbstractListModel):
     _logger = get_logger(__name__)
 
-    def __init__(self, wallet, parent=None):
-        super().__init__(parent)
-        self.wallet = wallet
-        self.init_model()
-
     # define listmodel rolemap
     _ROLE_NAMES=('key', 'is_lightning', 'timestamp', 'date', 'message', 'amount',
                  'status', 'status_str', 'address', 'expiration', 'type', 'onchain_fallback',
@@ -26,6 +21,11 @@ class QEAbstractInvoiceListModel(QAbstractListModel):
     _ROLE_MAP  = dict(zip(_ROLE_KEYS, [bytearray(x.encode()) for x in _ROLE_NAMES]))
     _ROLE_RMAP = dict(zip(_ROLE_NAMES, _ROLE_KEYS))
 
+    def __init__(self, wallet, parent=None):
+        super().__init__(parent)
+        self.wallet = wallet
+        self.init_model()
+
     def rowCount(self, index):
         return len(self.invoices)
 

electrum/gui/qml/qelnpaymentdetails.py

@@ -7,17 +7,17 @@ from .qetypes import QEAmount
 from .qewallet import QEWallet
 
 class QELnPaymentDetails(QObject):
-    def __init__(self, parent=None):
-        super().__init__(parent)
-
     _logger = get_logger(__name__)
 
-    _wallet = None
-    _key = None
-    _date = None
-
     detailsChanged = pyqtSignal()
 
+    def __init__(self, parent=None):
+        super().__init__(parent)
+
+        self._wallet = None
+        self._key = None
+        self._date = None
+
     walletChanged = pyqtSignal()
     @pyqtProperty(QEWallet, notify=walletChanged)
     def wallet(self):

electrum/gui/qml/qenetwork.py

@@ -8,17 +8,6 @@ from .util import QtEventListener, event_listener
 from .qeserverlistmodel import QEServerListModel
 
 class QENetwork(QObject, QtEventListener):
-    def __init__(self, network, qeconfig, parent=None):
-        super().__init__(parent)
-        self.network = network
-        self._qeconfig = qeconfig
-        self._serverListModel = None
-        self._height = network.get_local_height() # init here, update event can take a while
-        self.register_callbacks()
-
-        self._qeconfig.useGossipChanged.connect(self.on_gossip_setting_changed)
-
-
     _logger = get_logger(__name__)
 
     networkUpdated = pyqtSignal()
@@ -47,6 +36,16 @@ class QENetwork(QObject, QtEventListener):
     _gossipDbChannels = 0
     _gossipDbPolicies = 0
 
+    def __init__(self, network, qeconfig, parent=None):
+        super().__init__(parent)
+        self.network = network
+        self._qeconfig = qeconfig
+        self._serverListModel = None
+        self._height = network.get_local_height() # init here, update event can take a while
+        self.register_callbacks()
+
+        self._qeconfig.useGossipChanged.connect(self.on_gossip_setting_changed)
+
     @event_listener
     def on_event_network_updated(self, *args):
         self.networkUpdated.emit()

electrum/gui/qml/qeqr.py

@@ -15,21 +15,22 @@ from electrum.i18n import _
 from electrum.util import profiler, get_asyncio_loop
 
 class QEQRParser(QObject):
-    def __init__(self, text=None, parent=None):
-        super().__init__(parent)
-        self._text = text
-        self.qrreader = get_qr_reader()
-        if not self.qrreader:
-            raise Exception(_("The platform QR detection library is not available."))
-
     _logger = get_logger(__name__)
 
     busyChanged = pyqtSignal()
     dataChanged = pyqtSignal()
     imageChanged = pyqtSignal()
 
-    _busy = False
+    def __init__(self, text=None, parent=None):
-    _image = None
+        super().__init__(parent)
+
+        self._busy = False
+        self._image = None
+
+        self._text = text
+        self.qrreader = get_qr_reader()
+        if not self.qrreader:
+            raise Exception(_("The platform QR detection library is not available."))
 
     @pyqtSlot('QImage')
     def scanImage(self, image=None):

electrum/gui/qml/qerequestdetails.py

@@ -26,17 +26,18 @@ class QERequestDetails(QObject, QtEventListener):
 
     _logger = get_logger(__name__)
 
-    _wallet = None
-    _key = None
-    _req = None
-    _timer = None
-    _amount = None
-
     detailsChanged = pyqtSignal() # generic request properties changed signal
     statusChanged = pyqtSignal()
 
     def __init__(self, parent=None):
         super().__init__(parent)
+
+        self._wallet = None
+        self._key = None
+        self._req = None
+        self._timer = None
+        self._amount = None
+
         self.register_callbacks()
         self.destroyed.connect(lambda: self.on_destroy())
 

electrum/gui/qml/qeserverlistmodel.py

@@ -13,7 +13,6 @@ from .util import QtEventListener, qt_event_listener, event_listener
 
 class QEServerListModel(QAbstractListModel, QtEventListener):
     _logger = get_logger(__name__)
-    _chaintips = 0
 
     # define listmodel rolemap
     _ROLE_NAMES=('name', 'address', 'is_connected', 'is_primary', 'is_tor', 'chain', 'height')
@@ -23,6 +22,9 @@ class QEServerListModel(QAbstractListModel, QtEventListener):
 
     def __init__(self, network, parent=None):
         super().__init__(parent)
+
+        self._chaintips = 0
+
         self.network = network
         self.init_model()
         self.register_callbacks()

electrum/gui/qml/qeswaphelper.py

@@ -18,30 +18,30 @@ from .qewallet import QEWallet
 class QESwapHelper(AuthMixin, QObject):
     _logger = get_logger(__name__)
 
-    _wallet = None
-    _sliderPos = 0
-    _rangeMin = 0
-    _rangeMax = 0
-    _tx = None
-    _valid = False
-    _userinfo = ''
-    _tosend = QEAmount()
-    _toreceive = QEAmount()
-    _serverfeeperc = ''
-    _serverfee = QEAmount()
-    _miningfee = QEAmount()
-    _isReverse = False
-
-    _service_available = False
-    _send_amount = 0
-    _receive_amount = 0
-
     error = pyqtSignal([str], arguments=['message'])
     confirm = pyqtSignal([str], arguments=['message'])
 
     def __init__(self, parent=None):
         super().__init__(parent)
 
+        self._wallet = None
+        self._sliderPos = 0
+        self._rangeMin = 0
+        self._rangeMax = 0
+        self._tx = None
+        self._valid = False
+        self._userinfo = ''
+        self._tosend = QEAmount()
+        self._toreceive = QEAmount()
+        self._serverfeeperc = ''
+        self._serverfee = QEAmount()
+        self._miningfee = QEAmount()
+        self._isReverse = False
+
+        self._service_available = False
+        self._send_amount = 0
+        self._receive_amount = 0
+
     walletChanged = pyqtSignal()
     @pyqtProperty(QEWallet, notify=walletChanged)
     def wallet(self):

electrum/gui/qml/qetransactionlistmodel.py

@@ -10,18 +10,6 @@ from .qetypes import QEAmount
 from .util import QtEventListener, qt_event_listener
 
 class QETransactionListModel(QAbstractListModel, QtEventListener):
-    def __init__(self, wallet, parent=None, *, onchain_domain=None, include_lightning=True):
-        super().__init__(parent)
-        self.wallet = wallet
-        self.onchain_domain = onchain_domain
-        self.include_lightning = include_lightning
-
-        self.register_callbacks()
-        self.destroyed.connect(lambda: self.on_destroy())
-        self.requestRefresh.connect(lambda: self.init_model())
-
-        self.init_model()
-
     _logger = get_logger(__name__)
 
     # define listmodel rolemap
@@ -34,6 +22,18 @@ class QETransactionListModel(QAbstractListModel, QtEventListener):
 
     requestRefresh = pyqtSignal()
 
+    def __init__(self, wallet, parent=None, *, onchain_domain=None, include_lightning=True):
+        super().__init__(parent)
+        self.wallet = wallet
+        self.onchain_domain = onchain_domain
+        self.include_lightning = include_lightning
+
+        self.register_callbacks()
+        self.destroyed.connect(lambda: self.on_destroy())
+        self.requestRefresh.connect(lambda: self.init_model())
+
+        self.init_model()
+
     def on_destroy(self):
         self.unregister_callbacks()
 

electrum/gui/qml/qetxdetails.py

@@ -12,41 +12,6 @@ from .util import QtEventListener, event_listener
 class QETxDetails(QObject, QtEventListener):
     _logger = get_logger(__name__)
 
-    _wallet = None
-    _txid = ''
-    _rawtx = ''
-    _label = ''
-
-    _tx = None
-
-    _status = ''
-    _amount = QEAmount()
-    _lnamount = QEAmount()
-    _fee = QEAmount()
-    _inputs = []
-    _outputs = []
-
-    _is_lightning_funding_tx = False
-    _can_bump = False
-    _can_dscancel = False
-    _can_broadcast = False
-    _can_cpfp = False
-    _can_save_as_local = False
-    _can_remove = False
-    _can_sign = False
-    _is_unrelated = False
-    _is_complete = False
-    _is_mined = False
-    _is_final = False
-
-    _mempool_depth = ''
-
-    _date = ''
-    _height = 0
-    _confirmations = 0
-    _txpos = -1
-    _header_hash = ''
-
     confirmRemoveLocalTx = pyqtSignal([str], arguments=['message'])
     saveTxError = pyqtSignal([str,str], arguments=['code', 'message'])
     saveTxSuccess = pyqtSignal()
@@ -58,6 +23,41 @@ class QETxDetails(QObject, QtEventListener):
         self.register_callbacks()
         self.destroyed.connect(lambda: self.on_destroy())
 
+        self._wallet = None
+        self._txid = ''
+        self._rawtx = ''
+        self._label = ''
+
+        self._tx = None
+
+        self._status = ''
+        self._amount = QEAmount()
+        self._lnamount = QEAmount()
+        self._fee = QEAmount()
+        self._inputs = []
+        self._outputs = []
+
+        self._is_lightning_funding_tx = False
+        self._can_bump = False
+        self._can_dscancel = False
+        self._can_broadcast = False
+        self._can_cpfp = False
+        self._can_save_as_local = False
+        self._can_remove = False
+        self._can_sign = False
+        self._is_unrelated = False
+        self._is_complete = False
+        self._is_mined = False
+        self._is_final = False
+
+        self._mempool_depth = ''
+
+        self._date = ''
+        self._height = 0
+        self._confirmations = 0
+        self._txpos = -1
+        self._header_hash = ''
+
     def on_destroy(self):
         self.unregister_callbacks()
 

electrum/gui/qml/qetxfinalizer.py

@@ -16,16 +16,16 @@ from .qetypes import QEAmount
 from .util import QtEventListener, event_listener
 
 class FeeSlider(QObject):
-    _wallet = None
-    _sliderSteps = 0
-    _sliderPos = 0
-    _method = -1
-    _target = ''
-    _config = None
-
     def __init__(self, parent=None):
         super().__init__(parent)
 
+        self._wallet = None
+        self._sliderSteps = 0
+        self._sliderPos = 0
+        self._method = -1
+        self._target = ''
+        self._config = None
+
     walletChanged = pyqtSignal()
     @pyqtProperty(QEWallet, notify=walletChanged)
     def wallet(self):
@@ -125,17 +125,17 @@ class FeeSlider(QObject):
         raise NotImplementedError()
 
 class TxFeeSlider(FeeSlider):
-    _fee = QEAmount()
-    _feeRate = ''
-    _rbf = False
-    _tx = None
-    _outputs = []
-    _valid = False
-    _warning = ''
-
     def __init__(self, parent=None):
         super().__init__(parent)
 
+        self._fee = QEAmount()
+        self._feeRate = ''
+        self._rbf = False
+        self._tx = None
+        self._outputs = []
+        self._valid = False
+        self._warning = ''
+
     feeChanged = pyqtSignal()
     @pyqtProperty(QEAmount, notify=feeChanged)
     def fee(self):
@@ -223,13 +223,13 @@ class QETxFinalizer(TxFeeSlider):
         self.f_make_tx = make_tx
         self.f_accept = accept
 
-    _logger = get_logger(__name__)
+        self._address = ''
+        self._amount = QEAmount()
+        self._effectiveAmount = QEAmount()
+        self._extraFee = QEAmount()
+        self._canRbf = False
 
-    _address = ''
+    _logger = get_logger(__name__)
-    _amount = QEAmount()
-    _effectiveAmount = QEAmount()
-    _extraFee = QEAmount()
-    _canRbf = False
 
     addressChanged = pyqtSignal()
     @pyqtProperty(str, notify=addressChanged)
@@ -394,12 +394,13 @@ class QETxFinalizer(TxFeeSlider):
 # calls get_tx() once txid is set
 # calls tx_verified and emits txMined signal once tx is verified
 class TxMonMixin(QtEventListener):
-    _txid = ''
-
     txMined = pyqtSignal()
 
     def __init__(self, parent=None):
         self._logger.debug('TxMonMixin.__init__')
+
+        self._txid = ''
+
         self.register_callbacks()
         self.destroyed.connect(lambda: self.on_destroy())
 
@@ -436,14 +437,14 @@ class TxMonMixin(QtEventListener):
 class QETxRbfFeeBumper(TxFeeSlider, TxMonMixin):
     _logger = get_logger(__name__)
 
-    _oldfee = QEAmount()
-    _oldfee_rate = 0
-    _orig_tx = None
-    _rbf = True
-
     def __init__(self, parent=None):
         super().__init__(parent)
 
+        self._oldfee = QEAmount()
+        self._oldfee_rate = 0
+        self._orig_tx = None
+        self._rbf = True
+
     oldfeeChanged = pyqtSignal()
     @pyqtProperty(QEAmount, notify=oldfeeChanged)
     def oldfee(self):
@@ -552,15 +553,15 @@ class QETxRbfFeeBumper(TxFeeSlider, TxMonMixin):
 class QETxCanceller(TxFeeSlider, TxMonMixin):
     _logger = get_logger(__name__)
 
-    _oldfee = QEAmount()
-    _oldfee_rate = 0
-    _orig_tx = None
-    _txid = ''
-    _rbf = True
-
     def __init__(self, parent=None):
         super().__init__(parent)
 
+        self._oldfee = QEAmount()
+        self._oldfee_rate = 0
+        self._orig_tx = None
+        self._txid = ''
+        self._rbf = True
+
     oldfeeChanged = pyqtSignal()
     @pyqtProperty(QEAmount, notify=oldfeeChanged)
     def oldfee(self):
@@ -658,24 +659,24 @@ class QETxCanceller(TxFeeSlider, TxMonMixin):
 class QETxCpfpFeeBumper(TxFeeSlider, TxMonMixin):
     _logger = get_logger(__name__)
 
-    _input_amount = QEAmount()
-    _output_amount = QEAmount()
-    _fee_for_child = QEAmount()
-    _total_fee = QEAmount()
-    _total_fee_rate = 0
-    _total_size = 0
-
-    _parent_tx = None
-    _new_tx = None
-    _parent_tx_size = 0
-    _parent_fee = 0
-    _max_fee = 0
-    _txid = ''
-    _rbf = True
-
     def __init__(self, parent=None):
         super().__init__(parent)
 
+        self._input_amount = QEAmount()
+        self._output_amount = QEAmount()
+        self._fee_for_child = QEAmount()
+        self._total_fee = QEAmount()
+        self._total_fee_rate = 0
+        self._total_size = 0
+
+        self._parent_tx = None
+        self._new_tx = None
+        self._parent_tx_size = 0
+        self._parent_fee = 0
+        self._max_fee = 0
+        self._txid = ''
+        self._rbf = True
+
     totalFeeChanged = pyqtSignal()
     @pyqtProperty(QEAmount, notify=totalFeeChanged)
     def totalFee(self):

electrum/gui/qml/qewallet.py

@@ -74,28 +74,29 @@ class QEWallet(AuthMixin, QObject, QtEventListener):
 
     _network_signal = pyqtSignal(str, object)
 
-    _isUpToDate = False
-    _synchronizing = False
-    _synchronizing_progress = ''
-
-    _lightningbalance = QEAmount()
-    _confirmedbalance = QEAmount()
-    _unconfirmedbalance = QEAmount()
-    _frozenbalance = QEAmount()
-    _totalbalance = QEAmount()
-    _lightningcanreceive = QEAmount()
-    _lightningcansend = QEAmount()
-
     def __init__(self, wallet: 'Abstract_Wallet', parent=None):
         super().__init__(parent)
         self.wallet = wallet
 
+        self._isUpToDate = False
+        self._synchronizing = False
+        self._synchronizing_progress = ''
+
         self._historyModel = None
         self._addressModel = None
         self._requestModel = None
         self._invoiceModel = None
         self._channelModel = None
 
+        self._lightningbalance = QEAmount()
+        self._confirmedbalance = QEAmount()
+        self._unconfirmedbalance = QEAmount()
+        self._frozenbalance = QEAmount()
+        self._totalbalance = QEAmount()
+        self._lightningcanreceive = QEAmount()
+        self._lightningcansend = QEAmount()
+
+
         self.tx_notification_queue = queue.Queue()
         self.tx_notification_last_time = 0
 
@@ -420,6 +421,8 @@ class QEWallet(AuthMixin, QObject, QtEventListener):
     def lightningBalance(self):
         if self.isLightning:
             self._lightningbalance.satsInt = int(self.wallet.lnworker.get_balance())
+        # else:
+        #     self._lightningbalance.satsInt = 0
         return self._lightningbalance
 
     @pyqtProperty(QEAmount, notify=balanceChanged)

electrum/gui/qml/qewalletdb.py

@@ -10,14 +10,6 @@ from electrum.util import InvalidPassword
 from electrum import keystore
 
 class QEWalletDB(QObject):
-    def __init__(self, parent=None):
-        super().__init__(parent)
-
-        from .qeapp import ElectrumQmlApplication
-        self.daemon = ElectrumQmlApplication._daemon
-
-        self.reset()
-
     _logger = get_logger(__name__)
 
     fileNotFound = pyqtSignal()
@@ -31,6 +23,14 @@ class QEWalletDB(QObject):
     readyChanged = pyqtSignal()
     invalidPassword = pyqtSignal()
 
+    def __init__(self, parent=None):
+        super().__init__(parent)
+
+        from .qeapp import ElectrumQmlApplication
+        self.daemon = ElectrumQmlApplication._daemon
+
+        self.reset()
+
     def reset(self):
         self._path = None
         self._needsPassword = False