fix transaction manager

loc_chain_app/lib/util/transaction_manager.dart

@@ -1,21 +1,13 @@
-import 'package:fast_rsa/model/bridge.pb.dart';
-import 'package:shared_preferences/shared_preferences.dart';
-import 'package:sqflite/sqflite.dart';
-import 'package:fast_rsa/rsa.dart';
-import 'package:dbcrypt/dbcrypt.dart';
-
+import 'package:flutter_udid/flutter_udid.dart';
 import 'package:loc_chain_app/util/keyfile_manager.dart';
 
-import 'dart:io';
-
 class Transaction {
   Transaction({required this.hash, required this.pubKey});
   final String hash;
   final String pubKey;
 
   static Future<String> generateHash(String otherUserId) async {
-    String id = await SharedPreferences.getInstance()
-        .then((s) => s.getString('userName') ?? '');
+    String id = await FlutterUdid.consistentUdid;
     bool idLess = id.compareTo(otherUserId) < 0;
     var lesser = idLess ? id : otherUserId;
     var greater = idLess ? otherUserId : id;
@@ -27,13 +19,3 @@ class Transaction {
   Future<String> generateP2PPayload(String otherUserId) async =>
       "${await generateHash(otherUserId)}:${KeyFileManager.keyPair.publicKey}";
 }
-
-class TransactionsDBManager {
-  static Future<Database> get _localFile async {
-    return openDatabase('transactions.db');
-  }
-
-  static Future<List<Transaction>?> readTransactions() async {}
-
-  static Future<void> writeKeyPair(KeyPair pair) async {}
-}

loc_chain_app/pubspec.lock

@@ -77,7 +77,7 @@ packages:
       name: fast_rsa
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.4.0-nullsafety.4"
+    version: "2.0.0-nullsafety.0"
   ffi:
     dependency: transitive
     description:
@@ -92,6 +92,34 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.1.0"
+  firebase_core:
+    dependency: transitive
+    description:
+      name: firebase_core
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
+  firebase_core_platform_interface:
+    dependency: transitive
+    description:
+      name: firebase_core_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.0.0"
+  firebase_core_web:
+    dependency: transitive
+    description:
+      name: firebase_core_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.2"
+  firebase_database:
+    dependency: "direct main"
+    description:
+      name: firebase_database
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.1.2"
   fixnum:
     dependency: transitive
     description:

loc_chain_app/pubspec.yaml

@@ -30,10 +30,11 @@ dependencies:
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
   path_provider: ^2.0.1
-  fast_rsa: ^1.4.0-nullsafety.4
+  fast_rsa: ^2.0.0-nullsafety.0
   sqflite: ^2.0.0+3
   dbcrypt: ^2.0.0
   flutter_udid: ^2.0.0
+  firebase_database: ^6.1.2
 
 dev_dependencies:
   flutter_test: