From 68c20641b959844bb5495e48126190bfb69d8c05 Mon Sep 17 00:00:00 2001
From: OmarHatem <omarh.ismail1@gmail.com>
Date: Wed, 23 Nov 2022 23:02:18 +0200
Subject: [PATCH] Save exceptions locally

---
 lib/main.dart | 35 +++++++++++++++++++++++++++++++----
 1 file changed, 31 insertions(+), 4 deletions(-)

diff --git a/lib/main.dart b/lib/main.dart
index 193240518..541415f13 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -1,4 +1,7 @@
 import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+import 'dart:isolate';
 import 'package:cake_wallet/bitcoin/bitcoin.dart';
 import 'package:cake_wallet/entities/language_service.dart';
 import 'package:cake_wallet/buy/order.dart';
@@ -46,11 +49,24 @@ Future<void> main() async {
   await runZonedGuarded(() async {
     WidgetsFlutterBinding.ensureInitialized();
 
-    // FlutterError.onError = ;
+    FlutterError.onError = (errorDetails) {
+      _saveException(errorDetails.exception.toString(), errorDetails.stack);
+    };
 
-    // Isolate.current.addErrorListener(RawReceivePort((pair) async {
-    //   final List<dynamic> errorAndStacktrace = pair;
-    // }).sendPort);
+    PlatformDispatcher.instance.onError = (error, stack) {
+      _saveException(error.toString(), stack);
+      return true;
+    };
+
+    Isolate.current.addErrorListener(RawReceivePort((pair) async {
+      final errorAndStacktrace = pair as List<String?>;
+      _saveException(
+        errorAndStacktrace.first,
+        errorAndStacktrace.last == null
+            ? null
+            : StackTrace.fromString(errorAndStacktrace.last!),
+      );
+    }).sendPort);
 
     final appDir = await getApplicationDocumentsDirectory();
     await Hive.close();
@@ -151,6 +167,17 @@ Future<void> main() async {
   });
 }
 
+void _saveException(String? error, StackTrace? stackTrace) async {
+  final file = File('/error.txt');
+  final exception = {
+    "${DateTime.now()}": {
+      "error": error,
+      "stackTrace": stackTrace.toString(),
+    }
+  };
+  await file.writeAsString(jsonEncode(exception), mode: FileMode.append);
+}
+
 Future<void> initialSetup(
     {required SharedPreferences sharedPreferences,
     required Box<Node> nodes,