.nc and related commands.

You can set pixel colors (and text) on a 500x350 canvas, pepega version of r/place
You use currency to set pixels.
see whole canvas: .nc
set pixel: .ncsp <pos> <color> <text?>
get pixel: .ncp <pos>
zoom: .ncz <pos> or .ncz x y

src/EllieBot/Services/GrpcApi/ExprsSvc.cs

@@ -22,9 +22,6 @@ public class ExprsSvc : GrpcExprs.GrpcExprsBase, IGrpcSvc, IEService
     public ServerServiceDefinition Bind()
         => GrpcExprs.BindService(this);
 
-    private ulong GetUserId(Metadata meta)
-        => ulong.Parse(meta.FirstOrDefault(x => x.Key == "userid")!.Value);
-
     public override async Task<AddExprReply> AddExpr(AddExprRequest request, ServerCallContext context)
     {
         if (string.IsNullOrWhiteSpace(request.Expr.Trigger) || string.IsNullOrWhiteSpace(request.Expr.Response))
@@ -109,7 +106,7 @@ public class ExprsSvc : GrpcExprs.GrpcExprsBase, IGrpcSvc, IEService
 
     public override async Task<AddQuoteReply> AddQuote(AddQuoteRequest request, ServerCallContext context)
     {
-        var userId = GetUserId(context.RequestHeaders);
+        var userId = context.RequestHeaders.GetUserId();
 
         if (string.IsNullOrWhiteSpace(request.Quote.Trigger) || string.IsNullOrWhiteSpace(request.Quote.Response))
             throw new RpcException(new Status(StatusCode.InvalidArgument, "Trigger and response are required"));
@@ -146,7 +143,7 @@ public class ExprsSvc : GrpcExprs.GrpcExprsBase, IGrpcSvc, IEService
 
     public override async Task<Empty> DeleteQuote(DeleteQuoteRequest request, ServerCallContext context)
     {
-        await _qs.DeleteQuoteAsync(request.GuildId, GetUserId(context.RequestHeaders), true, new kwum(request.Id));
+        await _qs.DeleteQuoteAsync(request.GuildId, context.RequestHeaders.GetUserId(), true, new kwum(request.Id));
         return new Empty();
     }
 }

src/EllieBot/Services/GrpcApi/NCanvasSvc.cs

@@ -0,0 +1,95 @@
+using Google.Protobuf.WellKnownTypes;
+using Grpc.Core;
+using EllieBot.Db.Models;
+using EllieBot.Modules.Games;
+using SixLabors.ImageSharp.PixelFormats;
+
+namespace EllieBot.GrpcApi;
+
+public class NCanvasSvc : GrpcNCanvas.GrpcNCanvasBase, IGrpcSvc, IEService
+{
+    private readonly INCanvasService _nCanvas;
+    private readonly DiscordSocketClient _client;
+
+    public NCanvasSvc(INCanvasService nCanvas, DiscordSocketClient client)
+    {
+        _nCanvas = nCanvas;
+        _client = client;
+    }
+
+    public ServerServiceDefinition Bind()
+        => GrpcNCanvas.BindService(this);
+
+    [GrpcNoAuthRequired]
+    public override async Task<CanvasReply> GetCanvas(Empty request, ServerCallContext context)
+    {
+        var pixels = await _nCanvas.GetCanvas();
+        var reply = new CanvasReply()
+        {
+            Width = _nCanvas.GetWidth(),
+            Height = _nCanvas.GetHeight()
+        };
+        reply.Pixels.AddRange(pixels);
+        return reply;
+    }
+
+    [GrpcNoAuthRequired]
+    public override async Task<GetPixelReply> GetPixel(GetPixelRequest request, ServerCallContext context)
+    {
+        var pixel = await _nCanvas.GetPixel(request.X, request.Y);
+        if (pixel is null)
+            throw new RpcException(new Status(StatusCode.NotFound, "Pixel not found"));
+
+        var reply = MapPixelToGrpcPixel(pixel);
+        return reply;
+    }
+
+    private GetPixelReply MapPixelToGrpcPixel(NCPixel pixel)
+    {
+        var reply = new GetPixelReply
+        {
+            Color = "#" + new Rgba32(pixel.Color).ToHex(),
+            PackedColor = pixel.Color,
+            Position = new kwum(pixel.Position).ToString(),
+            PositionX = pixel.Position % _nCanvas.GetWidth(),
+            PositionY = pixel.Position / _nCanvas.GetWidth(),
+            // Owner = await ((IDiscordClient)_client).GetUserAsync(pixel.OwnerId)?.ToString() ?? string.Empty,
+            // OwnerId = pixel.OwnerId.ToString(),
+            Price = pixel.Price,
+            Text = pixel.Text
+        };
+        return reply;
+    }
+
+    [GrpcNoAuthRequired]
+    public override async Task<SetPixelReply> SetPixel(SetPixelRequest request, ServerCallContext context)
+    {
+        if (!kwum.TryParse(request.Position, out var pos))
+            throw new RpcException(new Status(StatusCode.InvalidArgument, "Position is invalid"));
+
+        if (!Rgba32.TryParseHex(request.Color, out var clr))
+            throw new RpcException(new Status(StatusCode.InvalidArgument, "Color is invalid"));
+
+        var userId = context.RequestHeaders.GetUserId();
+        var result = await _nCanvas.SetPixel(pos, clr.PackedValue, request.Text, userId, request.Price);
+        var reply = new SetPixelReply()
+        {
+            Success = result == SetPixelResult.Success,
+            Error = result switch
+            {
+                SetPixelResult.Success => string.Empty,
+                SetPixelResult.InsufficientPayment => "You have to pay equal or more than the price.",
+                SetPixelResult.NotEnoughMoney => "You don't have enough currency. ",
+                SetPixelResult.InvalidInput =>
+                    $"Invalid input. Position has to be >= 0 and < {_nCanvas.GetWidth()}x{_nCanvas.GetHeight()}",
+                _ => throw new ArgumentOutOfRangeException()
+            }
+        };
+
+        var pixel = await _nCanvas.GetPixel(pos);
+        if (pixel is not null)
+            reply.Pixel = MapPixelToGrpcPixel(pixel);
+
+        return reply;
+    }
+}

src/EllieBot/Services/SvcExtensions.cs

@@ -0,0 +1,9 @@
+using Grpc.Core;
+
+namespace EllieBot.GrpcApi;
+
+public static class SvcExtensions
+{
+    public static ulong GetUserId(this Metadata meta)
+        => ulong.Parse(meta.FirstOrDefault(x => x.Key == "userid")!.Value);
+}