Create utils.py

src/wallet/utils.py

@@ -0,0 +1,15 @@
+import json
+
+def save_to_file(data, filename):
+    with open(filename, 'w') as f:
+        json.dump(data, f)
+    print(f"Data saved to {filename}.")
+
+def load_from_file(filename):
+    with open(filename, 'r') as f:
+        data = json.load(f)
+    print(f"Data loaded from {filename}.")
+    return data
+
+def generate_unique_id():
+    return secrets.token_hex(16)  # Generate a unique transaction ID