diff --git a/loc_chain_app/lib/pages/history.dart b/loc_chain_app/lib/pages/history.dart
new file mode 100644
index 0000000..6db1e1d
--- /dev/null
+++ b/loc_chain_app/lib/pages/history.dart
@@ -0,0 +1,52 @@
+import 'package:flutter/material.dart';
+
+class HomePage extends StatefulWidget {
+  HomePage({Key? key, required this.title}) : super(key: key);
+  final String title;
+
+  @override
+  _HomePageState createState() => _HomePageState();
+}
+
+class _HomePageState extends State<HomePage> {
+  int _counter = 0;
+
+  void _incrementCounter() {
+    setState(() {
+      // This call to setState tells the Flutter framework that something has
+      // changed in this State, which causes it to rerun the build method below
+      // so that the display can reflect the updated values. If we changed
+      // _counter without calling setState(), then the build method would not be
+      // called again, and so nothing would appear to happen.
+      _counter++;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.title),
+      ),
+      body: Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            Text(
+              'You have pushed the button this many times:',
+            ),
+            Text(
+              '$_counter',
+              style: Theme.of(context).textTheme.headline4,
+            ),
+          ],
+        ),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: _incrementCounter,
+        tooltip: 'Increment',
+        child: Icon(Icons.add),
+      ),
+    );
+  }
+}
diff --git a/loc_chain_app/lib/util/transaction.dart b/loc_chain_app/lib/util/transaction.dart
deleted file mode 100644
index c8c1643..0000000
--- a/loc_chain_app/lib/util/transaction.dart
+++ /dev/null
@@ -1,5 +0,0 @@
-import 'package:flutter/services.dart';
-import 'package:fast_rsa/model/bridge.pb.dart';
-import 'package:fast_rsa/rsa.dart';
-
-class Transaction {}
diff --git a/loc_chain_app/lib/util/transaction_manager.dart b/loc_chain_app/lib/util/transaction_manager.dart
new file mode 100644
index 0000000..9bfee07
--- /dev/null
+++ b/loc_chain_app/lib/util/transaction_manager.dart
@@ -0,0 +1,25 @@
+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 'dart:io';
+
+class Transaction {
+  Transaction({required this.otherUserID}) {
+    SharedPreferences.getInstance().then((s) => _id = s.getString('id') ?? '0');
+  }
+  late final String _id;
+  final String otherUserID;
+  static Hash? makeTransactionHash() {}
+}
+
+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 {}
+}
diff --git a/loc_chain_app/pubspec.lock b/loc_chain_app/pubspec.lock
index 3820a3a..55b6fc5 100644
--- a/loc_chain_app/pubspec.lock
+++ b/loc_chain_app/pubspec.lock
@@ -252,6 +252,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.0"
+  sqflite:
+    dependency: "direct main"
+    description:
+      name: sqflite
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0+3"
+  sqflite_common:
+    dependency: transitive
+    description:
+      name: sqflite_common
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0+2"
   stack_trace:
     dependency: transitive
     description:
@@ -273,6 +287,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.0"
+  synchronized:
+    dependency: transitive
+    description:
+      name: synchronized
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.0"
   term_glyph:
     dependency: transitive
     description:
@@ -317,4 +338,4 @@ packages:
     version: "0.2.0"
 sdks:
   dart: ">=2.12.0 <3.0.0"
-  flutter: ">=1.20.0"
+  flutter: ">=1.24.0-10"
diff --git a/loc_chain_app/pubspec.yaml b/loc_chain_app/pubspec.yaml
index c262c59..d0ec6fe 100644
--- a/loc_chain_app/pubspec.yaml
+++ b/loc_chain_app/pubspec.yaml
@@ -31,6 +31,8 @@ dependencies:
   cupertino_icons: ^1.0.2
   path_provider: ^2.0.1
   fast_rsa: ^1.4.0-nullsafety.4
+  shared_preferences: ^2.0.5
+  sqflite: ^2.0.0+3
 
 dev_dependencies:
   flutter_test: