From db7c24f679e92ebfbf15b6c5bbcb383751776bfc Mon Sep 17 00:00:00 2001
From: s2quake <han0210@netsgo.com>
Date: Mon, 6 Jan 2025 15:44:40 +0900
Subject: [PATCH] feat: Add state query for delegator

---
 .../GraphTypes/DelegatorType.cs               | 31 ++++++++++++++++
 .../GraphTypes/StateQuery.cs                  | 37 +++++++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 NineChronicles.Headless/GraphTypes/DelegatorType.cs

diff --git a/NineChronicles.Headless/GraphTypes/DelegatorType.cs b/NineChronicles.Headless/GraphTypes/DelegatorType.cs
new file mode 100644
index 000000000..b5b7c6db5
--- /dev/null
+++ b/NineChronicles.Headless/GraphTypes/DelegatorType.cs
@@ -0,0 +1,31 @@
+using System.Numerics;
+using GraphQL.Types;
+using Libplanet.Types.Assets;
+using Nekoyume.ValidatorDelegation;
+
+namespace NineChronicles.Headless.GraphTypes;
+
+public class DelegatorType : ObjectGraphType<DelegatorType>
+{
+    public long LastDistributeHeight { get; set; }
+
+    public BigInteger Share { get; set; }
+
+    public FungibleAssetValue Fav { get; set; }
+
+    public DelegatorType()
+    {
+        Field<NonNullGraphType<LongGraphType>>(
+            nameof(LastDistributeHeight),
+            description: "LastDistributeHeight of delegator",
+            resolve: context => context.Source.LastDistributeHeight);
+        Field<NonNullGraphType<StringGraphType>>(
+            nameof(Share),
+            description: "Share of delegator",
+            resolve: context => context.Source.Share.ToString("N0"));
+        Field<NonNullGraphType<FungibleAssetValueType>>(
+            nameof(Fav),
+            description: "Delegated FAV calculated based on Share value",
+            resolve: context => context.Source.Fav);
+    }
+}
diff --git a/NineChronicles.Headless/GraphTypes/StateQuery.cs b/NineChronicles.Headless/GraphTypes/StateQuery.cs
index d1f526e9d..bd662f16d 100644
--- a/NineChronicles.Headless/GraphTypes/StateQuery.cs
+++ b/NineChronicles.Headless/GraphTypes/StateQuery.cs
@@ -790,6 +790,43 @@ public StateQuery()
                     return ValidatorType.FromDelegatee(delegatee);
                 }
             );
+
+            Field<DelegatorType>(
+                name: "delegator",
+                description: "State for delegator.",
+                arguments: new QueryArguments(
+                    new QueryArgument<NonNullGraphType<AddressType>>
+                    {
+                        Name = "agentAddress",
+                        Description = "Address of agent."
+                    }
+                ),
+                resolve: context =>
+                {
+                    var address = context.GetArgument<Address>("agentAddress");
+                    var agentAddress = new AgentAddress(address);
+                    var repository = new GuildRepository(new World(context.Source.WorldState), new HallowActionContext { });
+                    if (repository.TryGetGuildParticipant(agentAddress, out var guildParticipant))
+                    {
+                        var guild = repository.GetGuild(guildParticipant.GuildAddress);
+                        var delegatee = repository.GetDelegatee(guild.ValidatorAddress);
+                        var bond = repository.GetBond(delegatee, guildParticipant.Address);
+                        var totalDelegated = delegatee.Metadata.TotalDelegatedFAV;
+                        var totalShare = delegatee.Metadata.TotalShares;
+                        var lastDistributeHeight = bond.LastDistributeHeight ?? -1;
+                        var share = bond.Share;
+                        var fav = (share * totalDelegated).DivRem(totalShare).Quotient;
+                        return new DelegatorType
+                        {
+                            LastDistributeHeight = lastDistributeHeight,
+                            Share = share,
+                            Fav = fav,
+                        };
+                    }
+                    
+                    return null;
+                }
+            );
         }
 
         public static List<RuneOptionSheet.Row.RuneOptionInfo> GetRuneOptions(