work around to allow two different types of callbacks for the same one

Libraries/Core/Helpers/InventoryHelper.cs

@@ -130,7 +130,7 @@ public class InventoryHelper(
         try
         {
             if (request.Callback is not null)
-                request.Callback(rootItemToAdd.Upd.StackObjectsCount.Value);
+                request.Callback(rootItemToAdd.Upd.StackObjectsCount.Value, null, null, null);
         }
         catch (Exception ex)
         {

Libraries/Core/Helpers/ItemHelper.cs

@@ -373,7 +373,7 @@ public class ItemHelper(
     // found in the handbook. If the price can't be found at all return 0
     // @param List<string> tpls item tpls to look up the price of
     // @returns Total price in roubles
-    public decimal GetItemAndChildrenPrice(List<string> tpls)
+    public double GetItemAndChildrenPrice(List<string> tpls)
     {
         // Run getItemPrice for each tpl in tpls array, return sum
         return tpls.Aggregate(0, (total, tpl) => total + (int)GetItemPrice(tpl));

Libraries/Core/Models/Eft/Inventory/AddItemDirectRequest.cs

@@ -1,5 +1,7 @@
 using System.Text.Json.Serialization;
+using Core.Models.Eft.Common;
 using Core.Models.Eft.Common.Tables;
+using Core.Models.Eft.Trade;
 
 namespace Core.Models.Eft.Inventory;
 
@@ -15,7 +17,7 @@ public record AddItemDirectRequest
     public bool? FoundInRaid { get; set; }
 
     [JsonPropertyName("callback")]
-    public Action<double>? Callback { get; set; }
+    public Action<double, ProcessBuyTradeRequestData?, string?, PmcData?>? Callback { get; set; }
 
     [JsonPropertyName("useSortingTable")]
     public bool? UseSortingTable { get; set; }