hww: fix HardwareClientBase not having reference to plugin

it was incorrectly documented that it did (previously only for some plugins)

electrum/plugins/bitbox02/bitbox02.py

@@ -44,7 +44,8 @@ _logger = get_logger(__name__)
 
 class BitBox02Client(HardwareClientBase):
     # handler is a BitBox02_Handler, importing it would lead to a circular dependency
-    def __init__(self, handler: Any, device: Device, config: SimpleConfig):
+    def __init__(self, handler: Any, device: Device, config: SimpleConfig, *, plugin: HW_PluginBase):
+        HardwareClientBase.__init__(self, plugin=plugin)
         self.bitbox02_device = None
         self.handler = handler
         self.device_descriptor = device
@@ -556,12 +557,11 @@ class BitBox02Plugin(HW_PluginBase):
         else:
             raise ImportError()
 
-
     # handler is a BitBox02_Handler
     def create_client(self, device: Device, handler: Any) -> BitBox02Client:
         if not handler:
             self.handler = handler
-        return BitBox02Client(handler, device, self.config)
+        return BitBox02Client(handler, device, self.config, plugin=self)
 
     def setup_device(
         self, device_info: DeviceInfo, wizard: BaseWizard, purpose: int

electrum/plugins/coldcard/coldcard.py

@@ -60,7 +60,8 @@ CKCC_SIMULATED_PID = CKCC_PID ^ 0x55aa
 
 class CKCCClient(HardwareClientBase):
 
-    def __init__(self, plugin, handler, dev_path, is_simulator=False):
+    def __init__(self, plugin, handler, dev_path, *, is_simulator=False):
+        HardwareClientBase.__init__(self, plugin=plugin)
         self.device = plugin.device
         self.handler = handler
 

electrum/plugins/digitalbitbox/digitalbitbox.py

@@ -66,7 +66,7 @@ CHANNEL_ID_KEY = 'comserverchannelid'
 class DigitalBitbox_Client(HardwareClientBase):
 
     def __init__(self, plugin, hidDevice):
-        self.plugin = plugin
+        HardwareClientBase.__init__(self, plugin=plugin)
         self.dbb_hid = hidDevice
         self.opened = True
         self.password = None

electrum/plugins/hw_wallet/plugin.py

@@ -191,9 +191,11 @@ class HW_PluginBase(BasePlugin):
 
 class HardwareClientBase:
 
-    plugin: 'HW_PluginBase'
     handler = None  # type: Optional['HardwareHandlerBase']
 
+    def __init__(self, *, plugin: 'HW_PluginBase'):
+        self.plugin = plugin
+
     def is_pairable(self) -> bool:
         raise NotImplementedError()
 

electrum/plugins/keepkey/clientbase.py

@@ -103,6 +103,7 @@ class KeepKeyClientBase(HardwareClientBase, GuiMixin, Logger):
 
     def __init__(self, handler, plugin, proto):
         assert hasattr(self, 'tx_api')  # ProtocolMixin already constructed?
+        HardwareClientBase.__init__(self, plugin=plugin)
         self.proto = proto
         self.device = plugin.device
         self.handler = handler

electrum/plugins/ledger/ledger.py

@@ -62,7 +62,9 @@ def test_pin_unlocked(func):
 
 
 class Ledger_Client(HardwareClientBase):
-    def __init__(self, hidDevice, *, product_key: Tuple[int, int]):
+    def __init__(self, hidDevice, *, product_key: Tuple[int, int],
+                 plugin: HW_PluginBase):
+        HardwareClientBase.__init__(self, plugin=plugin)
         self.dongleObject = btchip(hidDevice)
         self.preflightDone = False
         self._product_key = product_key
@@ -602,7 +604,7 @@ class LedgerPlugin(HW_PluginBase):
 
         client = self.get_btchip_device(device)
         if client is not None:
-            client = Ledger_Client(client, product_key=device.product_key)
+            client = Ledger_Client(client, product_key=device.product_key, plugin=self)
         return client
 
     def setup_device(self, device_info, wizard, purpose):

electrum/plugins/safe_t/clientbase.py

@@ -105,6 +105,7 @@ class SafeTClientBase(HardwareClientBase, GuiMixin, Logger):
 
     def __init__(self, handler, plugin, proto):
         assert hasattr(self, 'tx_api')  # ProtocolMixin already constructed?
+        HardwareClientBase.__init__(self, plugin=plugin)
         self.proto = proto
         self.device = plugin.device
         self.handler = handler

electrum/plugins/trezor/clientbase.py

@@ -40,10 +40,10 @@ MESSAGES = {
 
 class TrezorClientBase(HardwareClientBase, Logger):
     def __init__(self, transport, handler, plugin):
+        HardwareClientBase.__init__(self, plugin=plugin)
         if plugin.is_outdated_fw_ignored():
             TrezorClient.is_outdated = lambda *args, **kwargs: False
         self.client = TrezorClient(transport, ui=self)
-        self.plugin = plugin
         self.device = plugin.device
         self.handler = handler
         Logger.__init__(self)