feat: add unity grpc client

api/gen/es/gnonativetypes_pb.d.ts

@@ -1,4 +1,4 @@
-// @generated by protoc-gen-es v1.5.1
+// @generated by protoc-gen-es v1.6.0
 // @generated from file gnonativetypes.proto (package land.gno.gnonative.v1, syntax proto3)
 /* eslint-disable */
 // @ts-nocheck

api/gen/es/gnonativetypes_pb.js

@@ -1,4 +1,4 @@
-// @generated by protoc-gen-es v1.5.1
+// @generated by protoc-gen-es v1.6.0
 // @generated from file gnonativetypes.proto (package land.gno.gnonative.v1, syntax proto3)
 /* eslint-disable */
 // @ts-nocheck

api/gen/es/rpc_connect.d.ts

@@ -1,4 +1,4 @@
-// @generated by protoc-gen-connect-es v1.1.4
+// @generated by protoc-gen-connect-es v1.3.0
 // @generated from file rpc.proto (package land.gno.gnonative.v1, syntax proto3)
 /* eslint-disable */
 // @ts-nocheck

api/gen/es/rpc_connect.js

@@ -1,4 +1,4 @@
-// @generated by protoc-gen-connect-es v1.1.4
+// @generated by protoc-gen-connect-es v1.3.0
 // @generated from file rpc.proto (package land.gno.gnonative.v1, syntax proto3)
 /* eslint-disable */
 // @ts-nocheck

api/gen/es/rpc_pb.d.ts

@@ -1,4 +1,4 @@
-// @generated by protoc-gen-es v1.5.1
+// @generated by protoc-gen-es v1.6.0
 // @generated from file rpc.proto (package land.gno.gnonative.v1, syntax proto3)
 /* eslint-disable */
 // @ts-nocheck

api/gen/es/rpc_pb.js

@@ -1,4 +1,4 @@
-// @generated by protoc-gen-es v1.5.1
+// @generated by protoc-gen-es v1.6.0
 // @generated from file rpc.proto (package land.gno.gnonative.v1, syntax proto3)
 /* eslint-disable */
 // @ts-nocheck

buf.gen.yaml

@@ -10,3 +10,7 @@ plugins:
     out: ./api/gen/es
   - plugin: buf.build/connectrpc/es
     out: ./api/gen/es
+  - plugin: buf.build/protocolbuffers/csharp
+    out: ./api/gen/csharp
+  - plugin: buf.build/grpc/csharp
+    out: ./api/gen/csharp

examples/UnityClient/README.md

@@ -0,0 +1,130 @@
+# gRPC .NET client with Unity
+
+This README will guide you to set up a new Unity project and to configure a
+[.NET gRPC](https://github.com/grpc/grpc-dotnet) client in C#.
+
+## Create a new project
+
+Open Unity Hub, click on `New Project`. In the new window, select 3D in the Core
+category. Set the project name and the wanted location in the right panel. Click
+on `Create Project`.
+
+## Install dependencies
+
+The gRPC .NET client is avalaible through the Nuget ecosystem. Unity doesn't
+support it natively, so we had to add a module
+([NuGetForUnity](https://github.com/GlitchEnzo/NuGetForUnity)) to be able to
+install it easily. Please install NuGetForUnity by following the README on their
+[github page](https://github.com/GlitchEnzo/NuGetForUnity) and come back here.
+
+Upon the installation complete, restart Unity to have the new NuGet menu. Select
+Nuget -> Manage NuGet Packages. Search and install these packages:
+
+-   Grpc.Net.Client
+-   Grpc.Net.Client.Web
+-   Google.Protobuf
+
+## Copy API dependencies
+
+We will copy the generated GnoNative API files and gRPC C# stubs into
+`Assets/Gno`.
+
+In a terminal, cd to your Unity project folder and write this command (replace
+${gnonative} by the location where is gnonative in your filesystem):
+
+```bash
+cp -r ${gnonative}/api/gen/csharp Assets/GnoNative
+```
+
+## Create a C# script
+
+In the project panel, click on the `Assets` folder to select it. Then click on
+the `+` sign and click on `C# script`. Name the new file `Hello`.
+
+Double click on it to open it in Visual Studio. Replace the content with:
+
+```c#
+using System;
+using System.Net.Http;
+using UnityEngine;
+using TMPro;
+
+using Grpc.Net.Client;
+using Grpc.Net.Client.Web;
+using Land.Gno.Gnonative.V1;
+
+public class Hello : MonoBehaviour
+{
+    public TextMeshProUGUI Text;
+
+    private GrpcChannel channel;
+    private GnoNativeService.GnoNativeServiceClient client;
+
+    // Start is called before the first frame update
+    void Start()
+    {
+        var options = new GrpcChannelOptions();
+        var handler = new GrpcWebHandler(GrpcWebMode.GrpcWeb, new HttpClientHandler());
+        options.HttpHandler = handler;
+
+        channel = GrpcChannel.ForAddress("http://localhost:26658", options);
+        client = new GnoNativeService.GnoNativeServiceClient(channel);
+    }
+
+    private void OnDestroy()
+    {
+        channel.Dispose();
+    }
+
+    public void OnHello()
+    {
+        var reply = client.Hello(new HelloRequest { Name = "Gno" });
+        Debug.Log(reply.Greeting.ToString());
+        Text.text = $"[{DateTime.Now}] {reply.Greeting}";
+    }
+}
+```
+
+In the `Start()` function, we initialize the gRPC client with the gRPC Web
+protocol and use the default GnoNative port. In the `OnHello()` function, we do
+the `Hello` gRPC call and set the result into the `Text` object. This function
+can be triggered by a button for example.
+
+Save the modifications and go back to Unity.
+
+We have to link the script with an object in the scene. So in the `Hierarchy`
+panel, click on the `+` sign and `Create Empty`. Name it `UI Script`. From the
+Project panel, drag and drop the Hello script to the UI Script object in the
+Hierarchy panel.
+
+## Create UI objects
+
+We want to create a button and a text objects on the scene to start the
+GnoNative call and print the result.
+
+In the Hierarchy panel, click on the `+` sign and select `UI` and
+`Text - TextMeshPro`. In the `TMP Importer` windows, click on
+`Import TMP Essentials` and close it. Still in the `UI` section, add a
+`Button - TextMeshPro`. You can move the objects in the scene to make it clean.
+
+Now we have to attach these two objects to the script we wrote:
+
+-   In the `Hierarchy` panel, select the button. Scroll down on the `Inspector`
+    (right panel) to find the `On Click` section and click on `+` to add a new
+    action. Drag and drop the `UI Script` object to the `None (Object)` in this
+    action, and replace `No Function` by `Hello.OnHello()`.
+-   In the `Hierarchy` panel, click on `UI Script`. In the `Inspector` panel, you
+    can see the `Hello (Script)` section with the empty `Text` field. Drag and
+    drop the `Text` object (in the `Hierarchy`) to this `Text` field (in the
+    `Inspector`).
+
+## Play
+
+In a terminal, go to `gnonative/goserver` and run the gRPC server:
+
+```bash
+go run . tcp
+```
+
+In Unity, click on the play button and click to the button on the scene. The
+text object should change.