Nicer verification error

lib/controllers/client_controller.dart

@@ -82,7 +82,7 @@ class ClientController extends AsyncNotifier<int> {
     try {
       await sendCommand("verify", {"recovery_key": recoveryKey});
       return true;
-    } catch (_) {
+    } catch (error) {
       return false;
     }
   }
@@ -91,7 +91,7 @@ class ClientController extends AsyncNotifier<int> {
     try {
       await sendCommand("login", login.toJson());
       return true;
-    } catch (_) {
+    } catch (error) {
       return false;
     }
   }
@@ -102,7 +102,7 @@ class ClientController extends AsyncNotifier<int> {
         "user_id": "@fakeuser:${homeserver.host}",
       });
       return (response["m.homeserver"] as Map<String, dynamic>)["base_url"];
-    } catch (_) {
+    } catch (error) {
       return null;
     }
   }

lib/pages/verify_page.dart

@@ -10,6 +10,7 @@ class VerifyPage extends HookConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final passphraseController = useTextEditingController();
+    final isVerifying = useState(false);
     return AlertDialog(
       title: Text("Verify"),
       content: Column(
@@ -32,11 +33,46 @@ class VerifyPage extends HookConsumerWidget {
       ),
       actions: [
         TextButton(
-          onPressed: () async {
+          onPressed: isVerifying.value
-            ref
+              ? null
+              : () async {
+                  final scaffoldMessenger = ScaffoldMessenger.of(context);
+                  final snackbar = scaffoldMessenger.showSnackBar(
+                    SnackBar(
+                      content: Text(
+                        "Attempting to verify with recovery key...",
+                      ),
+                      duration: Duration(days: 999),
+                    ),
+                  );
+
+                  isVerifying.value = true;
+
+                  final success = await ref
                       .watch(ClientController.provider.notifier)
                       .verify(passphraseController.text);
-            Navigator.of(context).pop();
+
+                  snackbar.close();
+                  if (!success) {
+                    isVerifying.value = false;
+                    if (context.mounted) {
+                      scaffoldMessenger.showSnackBar(
+                        SnackBar(
+                          backgroundColor: Theme.of(
+                            context,
+                          ).colorScheme.errorContainer,
+                          content: Text(
+                            "Verification failed. Is your passphrase correct?",
+                            style: TextStyle(
+                              color: Theme.of(
+                                context,
+                              ).colorScheme.onErrorContainer,
+                            ),
+                          ),
+                        ),
+                      );
+                    }
+                  }
                 },
           child: Text("Verify"),
         ),