add engine_getClientVersionV1 API support

src/Nethermind/Nethermind.Core/ProductInfo.cs

@@ -29,13 +29,16 @@ static ProductInfo()
         Runtime = RuntimeInformation.FrameworkDescription;
         Version = infoAttr?.InformationalVersion ?? string.Empty;
 
+        ClientCode = "NM";
         ClientId = $"{Name}/v{Version}/{OS.ToLowerInvariant()}-{OSArchitecture}/dotnet{Runtime[5..]}";
     }
 
     public static DateTimeOffset BuildTimestamp { get; }
 
     public static string ClientId { get; }
 
+    public static string ClientCode { get; }
+
     public static string Commit { get; }
 
     public static string Name { get; }

src/Nethermind/Nethermind.Merge.Plugin.Test/EngineModuleTests.V1.cs

@@ -1517,6 +1517,18 @@ await rpc.engine_forkchoiceUpdatedV1(forkChoiceState1,
         }
     }
 
+    [Test]
+    public async Task Should_return_ClientVersionV1()
+    {
+        using MergeTestBlockchain chain = await CreateBlockchain();
+        IEngineRpcModule rpcModule = CreateEngineModule(chain);
+        ResultWrapper<ClientVersionV1[]> result = rpcModule.engine_getClientVersionV1(new ClientVersionV1());
+        result.Data[0].code.Should().Be(ProductInfo.ClientCode);
+        result.Data[0].version.Should().Be(ProductInfo.Version);
+        result.Data[0].name.Should().Be(ProductInfo.Name);
+        result.Data[0].commit.Should().Be(ProductInfo.Commit);
+    }
+
     [Test]
     public async Task Should_return_capabilities()
     {
@@ -1544,6 +1556,8 @@ public void Should_return_expected_capabilities_for_mainnet()
         string[] result = exchangeCapabilitiesHandler.Handle(Array.Empty<string>()).Data.ToArray();
         var expectedMethods = new string[]
         {
+            nameof(IEngineRpcModule.engine_getClientVersionV1),
+
             nameof(IEngineRpcModule.engine_getPayloadV1),
             nameof(IEngineRpcModule.engine_forkchoiceUpdatedV1),
             nameof(IEngineRpcModule.engine_newPayloadV1),

src/Nethermind/Nethermind.Merge.Plugin/Data/ClientVersionV1.cs

@@ -0,0 +1,31 @@
+// SPDX-FileCopyrightText: 2022 Demerzel Solutions Limited
+// SPDX-License-Identifier: LGPL-3.0-only
+
+using Nethermind.Core;
+
+namespace Nethermind.Merge.Plugin.Data;
+
+/// <summary>
+///   The client version specification.
+///   <seealso cref="https://github.com/ethereum/execution-apis/pull/517/files?short_path=f1e647c#diff-f1e647ce063c92e6fd6cd448746b1d1effcfd2fa2e1b031a71f8ce2f74ba0952"/>
+/// </summary>
+public readonly struct ClientVersionV1
+{
+    public ClientVersionV1()
+    {
+        this.code = ProductInfo.ClientCode;
+        this.name = ProductInfo.Name;
+        this.version = ProductInfo.Version;
+        this.commit = ProductInfo.Commit;
+    }
+
+    public string code { get; }
+    public string name { get; }
+    public string version { get; }
+    public string commit { get; }
+
+    public override string ToString() => $"{name}/v{version}/{code}";
+
+    public string ToJson() => $"{{\"code\":\"{code}\",\"name\":\"{name}\",\"version\":\"{version}\",\"commit\":\"{commit}\"}}";
+}
+

src/Nethermind/Nethermind.Merge.Plugin/EngineRpcModule.cs

@@ -50,4 +50,9 @@ public EngineRpcModule(
 
     public ResultWrapper<IEnumerable<string>> engine_exchangeCapabilities(IEnumerable<string> methods)
         => _capabilitiesHandler.Handle(methods);
+
+    public ResultWrapper<ClientVersionV1[]> engine_getClientVersionV1(ClientVersionV1 clientVersionV1)
+    {
+        return ResultWrapper<ClientVersionV1[]>.Success([new ClientVersionV1()]);
+    }
 }

src/Nethermind/Nethermind.Merge.Plugin/Handlers/EngineRpcCapabilitiesProvider.cs

@@ -30,6 +30,7 @@ public EngineRpcCapabilitiesProvider(ISpecProvider specProvider)
             _capabilities[nameof(IEngineRpcModule.engine_forkchoiceUpdatedV1)] = (true, true);
             _capabilities[nameof(IEngineRpcModule.engine_getPayloadV1)] = (true, true);
             _capabilities[nameof(IEngineRpcModule.engine_newPayloadV1)] = (true, true);
+            _capabilities[nameof(IEngineRpcModule.engine_getClientVersionV1)] = (true, true);
             #endregion
 
             #region Shanghai

src/Nethermind/Nethermind.Merge.Plugin/IEngineRpcModule.cs

@@ -4,6 +4,7 @@
 using System.Collections.Generic;
 using Nethermind.JsonRpc;
 using Nethermind.JsonRpc.Modules;
+using Nethermind.Merge.Plugin.Data;
 
 namespace Nethermind.Merge.Plugin;
 
@@ -15,4 +16,11 @@ public partial interface IEngineRpcModule : IRpcModule
         IsSharable = true,
         IsImplemented = true)]
     ResultWrapper<IEnumerable<string>> engine_exchangeCapabilities(IEnumerable<string> methods);
+
+    [JsonRpcMethod(
+        Description = "Returns the client version specification.",
+        IsSharable = true,
+        IsImplemented = true)]
+
+    ResultWrapper<ClientVersionV1[]> engine_getClientVersionV1(ClientVersionV1 clientVersionV1);
 }