diff --git a/lib/api.dart b/lib/api.dart
index af93ada..e77f68a 100644
--- a/lib/api.dart
+++ b/lib/api.dart
@@ -251,10 +251,8 @@ class API {
 
   // /flow/<id>/end
   Future<List<String>?> endFlow(String id, {List<SupplyForm>? produced}) async {
-// todo : update api for supplyform
-
-    var resp = jsonDecode(
-        await postRequest("$instance/$id/end", {"produced": produced}));
+    var resp = jsonDecode(await postRequest("$instance/$id/end",
+        {"produced": produced?.map((x) => x.json()).toList()}));
 
     if (produced != null) {
       return resp["produced"] as List<String>;
@@ -384,12 +382,12 @@ class Transaction {
   late String item;
   late String variant;
   late Price price;
-  late String? origin;
+  String? origin;
   late int timestamp;
-  late ConsumeInfo? consumed;
+  ConsumeInfo? consumed;
   late bool expired;
-  late String? note;
-  late Location? location;
+  String? note;
+  Location? location;
 
   Transaction(Map<String, dynamic> json) {
     uuid = json["uuid"];
@@ -404,11 +402,11 @@ class Transaction {
     location = json["location"] != null ? Location(json["location"]) : null;
   }
 
-  Transaction.inMemory(String itemID, String variant, String price,
+  Transaction.inMemory(String itemID, String variantID, String price,
       String? origin, Location? location, String? note) {
     uuid = "";
     item = itemID;
-    variant = variant;
+    variant = variantID;
     this.price = Price.fromString(price);
     origin = origin;
     timestamp = 0;
diff --git a/lib/pages/supply.dart b/lib/pages/supply.dart
index 1b214e8..985a72d 100644
--- a/lib/pages/supply.dart
+++ b/lib/pages/supply.dart
@@ -38,7 +38,7 @@ class _SupplyPageState extends State<SupplyPage> {
     availableVariants =
         widget.onlyVariants ?? widget.item.variants.keys.toList();
 
-    variant = widget.item.variants.keys.first;
+    variant = availableVariants.first;
 
     _selectedOrigin = widget.forceOrigin ?? "";
     _priceController = TextEditingController(text: widget.forcePrice ?? "");
@@ -310,6 +310,17 @@ class SupplyForm {
     );
   }
 
+  Map<String, dynamic> json() {
+    return {
+      "item": itemID,
+      "variant": variant,
+      "price": price,
+      "origin": origin,
+      "location": location,
+      "note": note
+    };
+  }
+
   SupplyForm({
     required this.itemID,
     required this.variant,