Use GraphQL client generator

.config/dotnet-tools.json

@@ -0,0 +1,12 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "strawberryshake.tools": {
+      "version": "13.8.1",
+      "commands": [
+        "dotnet-graphql"
+      ]
+    }
+  }
+}

.gitignore

@@ -280,4 +280,7 @@ obj/
 /node_modules
 /wwwroot/node_modules
 
-# End of https://www.toptal.com/developers/gitignore/api/dotnetcore,aspnetcore
+# End of https://www.toptal.com/developers/gitignore/api/dotnetcore,aspnetcore
+
+# StrawberryShake
+Generated

NineChroniclesUtilBackend/.graphqlrc.json

@@ -0,0 +1,21 @@
+{
+  "schema": "schema.graphql",
+  "documents": "**/*.graphql",
+  "extensions": {
+    "strawberryShake": {
+      "name": "HeadlessGQLClient",
+      "namespace": "HeadlessGQL",
+      "url": "https://9c-main-full-state.nine-chronicles.com/graphql",
+      "records": {
+        "inputs": false,
+        "entities": false
+      },
+      "transportProfiles": [
+        {
+          "default": "Http",
+          "subscription": "WebSocket"
+        }
+      ]
+    }
+  }
+}

NineChroniclesUtilBackend/NineChroniclesUtilBackend.csproj

@@ -12,6 +12,8 @@
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
     <PackageReference Include="Lib9c" Version="1.1.0-dev.e1742b5c9a96d9b86a329e796c9c6e13e874ba0c" />
     <PackageReference Include="Libplanet" Version="3.9.3" />
+    <PackageReference Include="StrawberryShake" Version="13.8.1" />
+    <PackageReference Include="StrawberryShake.Transport.Http" Version="13.8.1" />
   </ItemGroup>
 
 </Project>

NineChroniclesUtilBackend/Program.cs

@@ -2,6 +2,7 @@
 using Bencodex.Types;
 using Libplanet.Crypto;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Options;
 using Nekoyume;
 using Nekoyume.Action;
 using Nekoyume.Arena;
@@ -30,6 +31,9 @@
     options.SupportNonNullableReferenceTypes();
 });
 builder.Services.AddSingleton<IStateService, HeadlessStateService>();
+builder.Services.AddHeadlessGQLClient()
+    .ConfigureHttpClient((provider, client) =>
+        client.BaseAddress = provider.GetRequiredService<IOptions<HeadlessStateServiceOption>>().Value.HeadlessEndpoint);
 
 var app = builder.Build();
 

NineChroniclesUtilBackend/Queries.graphql

@@ -0,0 +1,11 @@
+query GetTip {
+    nodeStatus {
+        tip {
+            index
+        }
+    }
+}
+
+query GetState($address: Address!) {
+    state(address: $address)
+}

NineChroniclesUtilBackend/Services/HeadlessStateService.cs

@@ -1,49 +1,40 @@
-using System.Text;
-using System.Text.Json;
 using Bencodex;
 using Bencodex.Types;
+using HeadlessGQL;
 using Libplanet.Crypto;
-using Microsoft.Extensions.Options;
-using NineChroniclesUtilBackend.Options;
+using Libplanet.Types.Blocks;
+using StrawberryShake;
 
 namespace NineChroniclesUtilBackend.Services;
 
-public class HeadlessStateService(IOptions<HeadlessStateServiceOption> options) : IStateService
+public class HeadlessStateService(IHeadlessGQLClient client) : IStateService
 {
-    private readonly Uri _headlessEndpoint = options.Value.HeadlessEndpoint;
-    private readonly HttpClient _httpClient = new();
-
     private static readonly Codec Codec = new();
 
+    private (long, BlockHash) TipInfo { get; set; }
+
+    public long TipIndex => TipInfo.Item1;
+
     public Task<IValue?[]> GetStates(Address[] addresses)
     {
         return Task.WhenAll(addresses.Select(GetState));
     }
 
     public async Task<IValue?> GetState(Address address)
     {
-        using StringContent jsonContent = new
-        (JsonSerializer.Serialize(new
-        {
-            query = @"query GetState($address: Address!) { state(address: $address) }",
-            variables = new {
-                address = address.ToString(),
-            },
-            operationName = "GetState",
-        }),
-            Encoding.UTF8,
-            "application/json");
-        using var response = await _httpClient.PostAsync(_headlessEndpoint, jsonContent);
-        var resp = await response.Content.ReadFromJsonAsync<GetStateResponse>();
-
-        if (resp.Data.State is null)
+        var result = await client.GetState.ExecuteAsync(address.ToString());
+        result.EnsureNoErrors();
+
+        if (result.Data?.State is null)
         {
             return null;
         }
 
-        return Codec.Decode(Convert.FromHexString(resp.Data.State));
+        return Codec.Decode(Convert.FromHexString(result.Data.State));
     }
-}
 
-record GetStateResponse(GetStateResponseData Data, object Errors);
-record GetStateResponseData(string? State);
+    private static void UpdateTipIndex()
+    {
+
+    }
+}

NineChroniclesUtilBackend/schema.extensions.graphql

@@ -0,0 +1,13 @@
+scalar _KeyFieldSet
+
+directive @key(fields: _KeyFieldSet!) on SCHEMA | OBJECT
+
+directive @serializationType(name: String!) on SCALAR
+
+directive @runtimeType(name: String!) on SCALAR
+
+directive @enumValue(value: String!) on ENUM_VALUE
+
+directive @rename(name: String!) on INPUT_FIELD_DEFINITION | INPUT_OBJECT | ENUM | ENUM_VALUE
+
+extend schema @key(fields: "id")