api: finance api implementation

src/NadekoBot/Modules/Games/NCanvas/NCanvasService.cs

@@ -110,7 +110,7 @@ public sealed class NCanvasService : INCanvasService, IReadyExecutor, INService
 
         var wallet = await _cs.GetWalletAsync(userId);
 
-        var paid = await wallet.Take(price, new("canvas", "pixel", $"Bought pixel #{position}"));
+        var paid = await wallet.Take(price, new("canvas", "pixel-buy", $"Bought pixel {new kwum(position)}"));
         if (!paid)
         {
             return SetPixelResult.NotEnoughMoney;
@@ -138,7 +138,7 @@ public sealed class NCanvasService : INCanvasService, IReadyExecutor, INService
 
         if (!success)
         {
-            await wallet.Add(price, new("canvas", "pixel-refund", $"Refund pixel #{position} purchase"));
+            await wallet.Add(price, new("canvas", "pixel-refund", $"Refund pixel {new kwum(position)} purchase"));
         }
 
         return success ? SetPixelResult.Success : SetPixelResult.InsufficientPayment;

src/NadekoBot/Services/GrpcApi/FinSvc.cs

@@ -0,0 +1,89 @@
+using Google.Protobuf.WellKnownTypes;
+using Grpc.Core;
+using NadekoBot.Db.Models;
+using NadekoBot.Modules.Gambling.Bank;
+using NadekoBot.Modules.NadekoExpressions;
+using NadekoBot.Modules.Utility;
+
+namespace NadekoBot.GrpcApi;
+
+public class FinSvc : GrpcFin.GrpcFinBase, IGrpcSvc, INService
+{
+    private readonly ICurrencyService _cs;
+    private readonly IBankService _bank;
+
+    public FinSvc(ICurrencyService cs, IBankService bank)
+    {
+        _cs = cs;
+        _bank = bank;
+    }
+
+    public ServerServiceDefinition Bind()
+        => GrpcFin.BindService(this);
+
+    [GrpcNoAuthRequired]
+    public override async Task<DepositReply> Deposit(DepositRequest request, ServerCallContext context)
+    {
+        if (request.Amount <= 0)
+            throw new RpcException(new Status(StatusCode.InvalidArgument, "Amount must be greater than 0"));
+
+        var succ = await _bank.DepositAsync(request.UserId, request.Amount);
+
+        return new DepositReply
+        {
+            Success = succ
+        };
+    }
+
+    [GrpcNoAuthRequired]
+    public override async Task<WithdrawReply> Withdraw(WithdrawRequest request, ServerCallContext context)
+    {
+        if (request.Amount <= 0)
+            throw new RpcException(new Status(StatusCode.InvalidArgument, "Amount must be greater than 0"));
+
+        var succ = await _bank.WithdrawAsync(request.UserId, request.Amount);
+
+        return new WithdrawReply
+        {
+            Success = succ
+        };
+    }
+
+    [GrpcNoAuthRequired]
+    public override async Task<GetHoldingsReply> GetHoldings(GetHoldingsRequest request, ServerCallContext context)
+    {
+        return new GetHoldingsReply
+        {
+            Bank = await _bank.GetBalanceAsync(request.UserId),
+            Cash = await _cs.GetBalanceAsync(request.UserId)
+        };
+    }
+
+    [GrpcNoAuthRequired]
+    public override async Task<GetTransactionsReply> GetTransactions(
+        GetTransactionsRequest request,
+        ServerCallContext context)
+    {
+        if (request.Page < 1)
+            throw new RpcException(new Status(StatusCode.InvalidArgument, "Page must be greater than 0"));
+        
+        var trs = await _cs.GetTransactionsAsync(request.UserId, request.Page - 1);
+
+        var reply = new GetTransactionsReply
+        {
+            Total = await _cs.GetTransactionsCountAsync(request.UserId)
+        };
+
+        reply.Transactions.AddRange(trs.Select(x => new TransactionReply()
+        {
+            Id = new kwum(x.Id).ToString(),
+            Timestamp = Timestamp.FromDateTime(DateTime.UtcNow),
+            Amount = x.Amount,
+            Extra = x.Extra ?? string.Empty,
+            Note = x.Note ?? string.Empty,
+            Type = x.Type ?? string.Empty,
+        }));
+
+        return reply;
+    }
+}

src/NadekoBot/_common/Currency/ICurrencyService.cs

@@ -40,4 +40,11 @@ public interface ICurrencyService
         TxData? txData);
     
     Task<IReadOnlyList<DiscordUser>> GetTopRichest(ulong ignoreId, int page = 0, int perPage = 9);
+
+    Task<IReadOnlyList<CurrencyTransaction>> GetTransactionsAsync(
+        ulong userId,
+        int page,
+        int perPage = 15);
+    
+    Task<int> GetTransactionsCountAsync(ulong userId);
 }

src/NadekoBot/_common/Services/Currency/CurrencyService.cs

@@ -55,14 +55,14 @@ public sealed class CurrencyService : ICurrencyService, INService
         {
             await using var ctx = _db.GetDbContext();
             await ctx
-                .GetTable<DiscordUser>()
-                .Where(x => userIds.Contains(x.UserId))
-                .UpdateAsync(du => new()
-                {
-                    CurrencyAmount = du.CurrencyAmount >= amount
-                        ? du.CurrencyAmount - amount
-                        : 0
-                });
+                  .GetTable<DiscordUser>()
+                  .Where(x => userIds.Contains(x.UserId))
+                  .UpdateAsync(du => new()
+                  {
+                      CurrencyAmount = du.CurrencyAmount >= amount
+                          ? du.CurrencyAmount - amount
+                          : 0
+                  });
             await ctx.SaveChangesAsync();
             return;
         }
@@ -112,4 +112,29 @@ public sealed class CurrencyService : ICurrencyService, INService
         await using var uow = _db.GetDbContext();
         return await uow.Set<DiscordUser>().GetTopRichest(ignoreId, page, perPage);
     }
+
+    public async Task<IReadOnlyList<CurrencyTransaction>> GetTransactionsAsync(
+        ulong userId,
+        int page,
+        int perPage = 15)
+    {
+        await using var uow = _db.GetDbContext();
+
+        var trs = await uow.GetTable<CurrencyTransaction>()
+                           .Where(x => x.UserId == userId)
+                           .OrderByDescending(x => x.DateAdded)
+                           .Skip(perPage * page)
+                           .Take(perPage)
+                           .ToListAsyncLinqToDB();
+
+        return trs;
+    }
+
+    public async Task<int> GetTransactionsCountAsync(ulong userId)
+    {
+        await using var uow = _db.GetDbContext();
+        return await uow.GetTable<CurrencyTransaction>()
+                       .Where(x => x.UserId == userId)
+                       .CountAsyncLinqToDB();
+    }
 }