diff --git a/lib/structs.dart b/lib/structs.dart
index 6eb1c17..b55beb9 100644
--- a/lib/structs.dart
+++ b/lib/structs.dart
@@ -1,5 +1,7 @@
 //data structures
 
+import 'dart:typed_data';
+
 class GetThreadResponse {
   final int id;
   final List<String> messages;
@@ -76,7 +78,7 @@ class SerializableMessage {
     required this.subject,
     required this.date,
     required this.uid,
-    required this.list,
+    required this.list, //email list???
     required this.id,
     required this.in_reply_to,
   });
@@ -118,3 +120,29 @@ class AttachmentInfo {
     );
   }
 }
+
+class AttachmentInfoList extends Iterable<AttachmentInfo> {
+  final List<AttachmentInfo> _attachments;
+
+  AttachmentInfoList(this._attachments);
+
+  factory AttachmentInfoList.fromJsonList(List<Map<String, dynamic>> jsonList) {
+    return AttachmentInfoList(jsonList.map((json) => AttachmentInfo.fromJson(json)).toList());
+  }
+
+  @override
+  Iterator<AttachmentInfo> get iterator => _attachments.iterator;
+
+  @override
+  String toString() => _attachments.toString();
+}
+
+class AttachmentResponse {
+  final name;
+  final Uint8List data;
+  AttachmentResponse({required this.name, required this.data});
+
+  factory AttachmentResponse.fromJson(Map<String, dynamic> json) {
+    return AttachmentResponse(name: json["name"], data: json["data"],);
+  }
+}