kivy: allow address reuse in imported wallets. (fix #6852)

electrum/gui/kivy/uix/dialogs/request_dialog.py

@@ -116,6 +116,10 @@ class RequestDialog(Factory.Popup):
         if self.status == PR_UNPAID and self.is_lightning and self.app.wallet.lnworker:
             if self.amount_sat and self.amount_sat > self.app.wallet.lnworker.num_sats_can_receive():
                 self.warning = _('Warning') + ': ' + _('This amount exceeds the maximum you can currently receive with your channels')
+        if self.status == PR_UNPAID and not self.is_lightning:
+            address = req.get_address()
+            if self.app.wallet.is_used(address):
+                self.warning = _('Warning') + ': ' + _('This address is being reused')
 
     def on_dismiss(self):
         self.app.request_popup = None

electrum/gui/kivy/uix/screens.py

@@ -491,8 +491,11 @@ class ReceiveScreen(CScreen):
         else:
             addr = self.address or self.app.wallet.get_unused_address()
             if not addr:
-                self.app.show_info(_('No address available. Please remove some of your pending requests.'))
-                return
+                if not self.app.wallet.is_deterministic():
+                    addr = self.app.wallet.get_receiving_address()
+                else:
+                    self.app.show_info(_('No address available. Please remove some of your pending requests.'))
+                    return
             self.address = addr
             req = self.app.wallet.make_payment_request(addr, amount, message, self.expiry())
             self.app.wallet.add_payment_request(req)