Pack opening

SVSim.EmulatedEntrypoint/Models/Dtos/Requests/Pack/PackOpenRequest.cs

@@ -0,0 +1,43 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Requests.Pack;
+
+/// <summary>
+/// Inbound /pack/open body. Accepts ALL three client-side overloads in one DTO — fields
+/// for Starter (<c>class_id</c>) and Skin (<c>target_card_id</c>) are nullable so we can
+/// reject those overloads in the controller without a custom binder.
+/// See <c>Wizard/PackOpenTask.cs</c> for the three SetParameter variants.
+/// </summary>
+[MessagePackObject]
+public class PackOpenRequest : BaseRequest
+{
+    [JsonPropertyName("parent_gacha_id")]
+    [Key("parent_gacha_id")]
+    public int ParentGachaId { get; set; }
+
+    [JsonPropertyName("gacha_id")]
+    [Key("gacha_id")]
+    public int GachaId { get; set; }
+
+    [JsonPropertyName("gacha_type")]
+    [Key("gacha_type")]
+    public int GachaType { get; set; }
+
+    [JsonPropertyName("pack_number")]
+    [Key("pack_number")]
+    public int PackNumber { get; set; }
+
+    [JsonPropertyName("exclude_card_ids")]
+    [Key("exclude_card_ids")]
+    public long[] ExcludeCardIds { get; set; } = Array.Empty<long>();
+
+    [JsonPropertyName("class_id")]
+    [Key("class_id")]
+    public int? ClassId { get; set; }
+
+    [JsonPropertyName("target_card_id")]
+    [Key("target_card_id")]
+    public long? TargetCardId { get; set; }
+}