added .rakeback to get a part of the house edge back. Rakeback is accumulated by betting (not winning or losing in particular). All games have manually specified rakeback values

slot now has 1 more icon (wheat!), and multipliers have been modified to even out the gains
betroll is improved (around 2% better payout), as 66 is now a winning number, not a losing one

src/EllieBot/Db/EllieContext.cs

@@ -74,6 +74,13 @@ public abstract class EllieContext : DbContext
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
+        #region Rakeback
+
+        modelBuilder.Entity<Rakeback>()
+                    .HasKey(x => x.UserId);
+
+        #endregion
+
         #region UserBetStats
 
         modelBuilder.Entity<UserBetStats>()

src/EllieBot/Migrations/PostgreSql/20241107051622_rakeback.cs

@@ -0,0 +1,33 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace EllieBot.Migrations.PostgreSql
+{
+    /// <inheritdoc />
+    public partial class rakeback : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "rakeback",
+                columns: table => new
+                {
+                    userid = table.Column<decimal>(type: "numeric(20,0)", nullable: false),
+                    amount = table.Column<decimal>(type: "numeric", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk_rakeback", x => x.userid);
+                });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "rakeback");
+        }
+    }
+}

src/EllieBot/Migrations/PostgreSql/PostgreSqlContextModelSnapshot.cs

@@ -3227,6 +3227,23 @@ namespace EllieBot.Migrations.PostgreSql
                     b.ToTable("greetsettings", (string)null);
                 });
 
+            modelBuilder.Entity("EllieBot.Services.Rakeback", b =>
+                {
+                    b.Property<decimal>("UserId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("numeric(20,0)")
+                        .HasColumnName("userid");
+
+                    b.Property<decimal>("Amount")
+                        .HasColumnType("numeric")
+                        .HasColumnName("amount");
+
+                    b.HasKey("UserId")
+                        .HasName("pk_rakeback");
+
+                    b.ToTable("rakeback", (string)null);
+                });
+
             modelBuilder.Entity("EllieBot.Services.UserBetStats", b =>
                 {
                     b.Property<int>("Id")

src/EllieBot/Migrations/Sqlite/20241107051525_rakeback.cs

@@ -0,0 +1,34 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace EllieBot.Migrations
+{
+    /// <inheritdoc />
+    public partial class rakeback : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Rakeback",
+                columns: table => new
+                {
+                    UserId = table.Column<ulong>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    Amount = table.Column<decimal>(type: "TEXT", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Rakeback", x => x.UserId);
+                });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Rakeback");
+        }
+    }
+}

src/EllieBot/Migrations/Sqlite/EllieSqliteContextModelSnapshot.cs

@@ -2399,6 +2399,20 @@ namespace EllieBot.Migrations
                     b.ToTable("GreetSettings");
                 });
 
+            modelBuilder.Entity("EllieBot.Services.Rakeback", b =>
+                {
+                    b.Property<ulong>("UserId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<decimal>("Amount")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("UserId");
+
+                    b.ToTable("Rakeback");
+                });
+
             modelBuilder.Entity("EllieBot.Services.UserBetStats", b =>
                 {
                     b.Property<int>("Id")

src/EllieBot/Modules/Gambling/Gambling.cs

@@ -38,6 +38,7 @@ public partial class Gambling : GamblingModule<GamblingService>
     private readonly IRemindService _remind;
     private readonly GamblingTxTracker _gamblingTxTracker;
     private readonly IPatronageService _ps;
+    private readonly RakebackService _rb;
 
     public Gambling(
         IGamblingService gs,
@@ -50,7 +51,8 @@ public partial class Gambling : GamblingModule<GamblingService>
         IBankService bank,
         IRemindService remind,
         IPatronageService patronage,
-        GamblingTxTracker gamblingTxTracker)
+        GamblingTxTracker gamblingTxTracker,
+        RakebackService rb)
         : base(configService)
     {
         _gs = gs;
@@ -60,6 +62,7 @@ public partial class Gambling : GamblingModule<GamblingService>
         _bank = bank;
         _remind = remind;
         _gamblingTxTracker = gamblingTxTracker;
+        _rb = rb;
         _ps = patronage;
         _rng = new EllieRandom();
 
@@ -318,7 +321,6 @@ public partial class Gambling : GamblingModule<GamblingService>
 
 
         var val = Config.Timely.Amount;
-
         var boostGuilds = Config.BoostBonus.GuildIds ?? new();
         var guildUsers = await boostGuilds
                                .Select(async gid =>
@@ -1089,4 +1091,45 @@ public partial class Gambling : GamblingModule<GamblingService>
                   footer: $"Total Bet: {tests} | Payout: {payout:F0} | {payout * 1.0M / tests * 100}%")
               .SendAsync();
     }
+
+    private EllieInteractionBase CreateRakebackInteraction()
+        => _inter.Create(ctx.User.Id,
+            new ButtonBuilder(
+                customId: "cash:rakeback",
+                emote: new Emoji("💸")),
+            RakebackAction);
+
+    private async Task RakebackAction(SocketMessageComponent arg)
+    {
+        var rb = await _rb.ClaimRakebackAsync(ctx.User.Id);
+
+        if (rb == 0)
+        {
+            await arg.DeferAsync();
+            return;
+        }
+
+        await arg.RespondAsync(_sender, GetText(strs.rakeback_claimed(N(rb))), MsgType.Ok);
+    }
+
+    [Cmd]
+    public async Task Rakeback()
+    {
+        var rb = await _rb.GetRakebackAsync(ctx.User.Id);
+
+        if (rb < 1)
+        {
+            await Response()
+                  .Error(strs.rakeback_none)
+                  .SendAsync();
+
+            return;
+        }
+
+        var inter = CreateRakebackInteraction();
+        await Response()
+              .Pending(strs.rakeback_available(N(rb)))
+              .Interaction(inter)
+              .SendAsync();
+    }
 }

src/EllieBot/Modules/Gambling/GamblingConfig.cs

@@ -11,7 +11,7 @@ namespace EllieBot.Modules.Gambling.Common;
 public sealed partial class GamblingConfig : ICloneable<GamblingConfig>
 {
     [Comment("""DO NOT CHANGE""")]
-    public int Version { get; set; } = 11;
+    public int Version { get; set; } = 12;
 
     [Comment("""Currency settings""")]
     public CurrencyConfig Currency { get; set; }
@@ -164,7 +164,7 @@ public partial class BetRollConfig
             },
             new()
             {
-                WhenAbove = 66,
+                WhenAbove = 65,
                 MultiplyBy = 2
             }
         ];
@@ -226,7 +226,7 @@ public partial class LuckyLadderSettings
     public decimal[] Multipliers { get; set; }
 
     public LuckyLadderSettings()
-        => Multipliers = [2.4M, 1.7M, 1.5M, 1.2M, 0.5M, 0.3M, 0.2M, 0.1M];
+        => Multipliers = [2.4M, 1.7M, 1.5M, 1.1M, 0.5M, 0.3M, 0.2M, 0.1M];
 }
 
 [Cloneable]

src/EllieBot/Modules/Gambling/GamblingConfigService.cs

@@ -189,11 +189,16 @@ public sealed class GamblingConfigService : ConfigServiceBase<GamblingConfig>
             });
         }
 
-        if (data.Version < 11)
+        if (data.Version < 12)
         {
             ModifyConfig(c =>
             {
-                c.Version = 11;
+                c.Version = 12;
+
+                if (c.BetRoll.Pairs.Length == 3 && c.BetRoll.Pairs[2].WhenAbove == 66)
+                {
+                    c.BetRoll.Pairs[2].WhenAbove = 65;
+                }
             });
         }
     }

src/EllieBot/Modules/Gambling/_common/IGamblingService.cs

@@ -13,5 +13,10 @@ public interface IGamblingService
     Task<OneOf<SlotResult, GamblingError>> SlotAsync(ulong userId, long amount);
     Task<FlipResult[]> FlipAsync(int count);
     Task<OneOf<RpsResult, GamblingError>> RpsAsync(ulong userId, long amount, byte pick);
-    Task<OneOf<BetdrawResult, GamblingError>> BetDrawAsync(ulong userId, long amount, byte? maybeGuessValue, byte? maybeGuessColor);
+
+    Task<OneOf<BetdrawResult, GamblingError>> BetDrawAsync(
+        ulong userId,
+        long amount,
+        byte? maybeGuessValue,
+        byte? maybeGuessColor);
 }

src/EllieBot/Modules/Gambling/_common/NewGamblingService.cs

@@ -1,4 +1,6 @@
 #nullable disable
+using LinqToDB;
+using LinqToDB.EntityFrameworkCore;
 using EllieBot.Modules.Gambling.Betdraw;
 using EllieBot.Modules.Gambling.Rps;
 using EllieBot.Modules.Gambling.Services;
@@ -8,12 +10,12 @@ namespace EllieBot.Modules.Gambling;
 
 public sealed class NewGamblingService : IGamblingService, IEService
 {
-    private readonly GamblingConfigService _bcs;
+    private readonly GamblingConfigService _gcs;
     private readonly ICurrencyService _cs;
 
-    public NewGamblingService(GamblingConfigService bcs, ICurrencyService cs)
+    public NewGamblingService(GamblingConfigService gcs, ICurrencyService cs)
     {
-        _bcs = bcs;
+        _gcs = gcs;
         _cs = cs;
     }
 
@@ -31,7 +33,7 @@ public sealed class NewGamblingService : IGamblingService, IEService
             }
         }
 
-        var game = new LulaGame(_bcs.Data.LuckyLadder.Multipliers);
+        var game = new LulaGame(_gcs.Data.LuckyLadder.Multipliers);
         var result = game.Spin(amount);
 
         var won = (long)result.Won;
@@ -57,7 +59,7 @@ public sealed class NewGamblingService : IGamblingService, IEService
             }
         }
 
-        var game = new BetrollGame(_bcs.Data.BetRoll.Pairs
+        var game = new BetrollGame(_gcs.Data.BetRoll.Pairs
                                        .Select(x => (x.WhenAbove, (decimal)x.MultiplyBy))
                                        .ToList());
 
@@ -88,7 +90,7 @@ public sealed class NewGamblingService : IGamblingService, IEService
             }
         }
 
-        var game = new BetflipGame(_bcs.Data.BetFlip.Multiplier);
+        var game = new BetflipGame(_gcs.Data.BetFlip.Multiplier);
         var result = game.Flip(guess, amount);
 
         var won = (long)result.Won;
@@ -100,7 +102,11 @@ public sealed class NewGamblingService : IGamblingService, IEService
         return result;
     }
 
-    public async Task<OneOf<BetdrawResult, GamblingError>> BetDrawAsync(ulong userId, long amount, byte? maybeGuessValue, byte? maybeGuessColor)
+    public async Task<OneOf<BetdrawResult, GamblingError>> BetDrawAsync(
+        ulong userId,
+        long amount,
+        byte? maybeGuessValue,
+        byte? maybeGuessColor)
     {
         ArgumentOutOfRangeException.ThrowIfNegative(amount);
 
@@ -266,3 +272,45 @@ public sealed class NewGamblingService : IGamblingService, IEService
         return result;
     }
 }
+
+public sealed class RakebackService : IEService
+{
+    private readonly DbService _db;
+    private readonly ICurrencyService _cs;
+
+    public RakebackService(DbService db, ICurrencyService cs)
+    {
+        _db = db;
+        _cs = cs;
+    }
+
+    public async Task<long> GetRakebackAsync(ulong userId)
+    {
+        await using var uow = _db.GetDbContext();
+
+        var rb = uow.GetTable<Rakeback>()
+            .Where(x => x.UserId == userId)
+            .Select(x => x.Amount)
+            .FirstOrDefault();
+
+        return (long)rb;
+    }
+
+    public async Task<long> ClaimRakebackAsync(ulong userId)
+    {
+        await using var uow = _db.GetDbContext();
+
+        var rbs = await uow.GetTable<Rakeback>()
+                          .Where(x => x.UserId == userId)
+                          .DeleteWithOutputAsync((x) => x.Amount);
+
+        if (rbs.Length == 0)
+            return 0;
+
+        var rb = (long)rbs[0];
+
+        await _cs.AddAsync(userId, rb, new("rakeback", "claim"));
+
+        return rb;
+    }
+}

src/EllieBot/_common/Gambling/Slot/SlotGame.cs

@@ -11,9 +11,9 @@ public class SlotGame
     {
         var rolls = new[]
         {
-            (byte)_rng.Next(0, 6),
+            (byte)_rng.Next(0, 7),
-            (byte)_rng.Next(0, 6),
+            (byte)_rng.Next(0, 7),
-            (byte)_rng.Next(0, 6)
+            (byte)_rng.Next(0, 7)
         };
 
         ref var a = ref rolls[0];
@@ -24,24 +24,24 @@ public class SlotGame
         var winType = SlotWinType.None;
         if (a == b && b == c)
         {
-            if (a == 5)
+            if (a == 6)
             {
                 winType = SlotWinType.TrippleJoker;
-                multi = 30;
+                multi = 25;
             }
             else
             {
                 winType = SlotWinType.TrippleNormal;
-                multi = 10;
+                multi = 15;
             }
         }
-        else if (a == 5 && (b == 5 || c == 5)
+        else if (a == 6 && (b == 6 || c == 6)
-                 || (b == 5 && c == 5))
+                 || (b == 6 && c == 6))
         {
             winType = SlotWinType.DoubleJoker;
-            multi = 4;
+            multi = 6;
         }
-        else if (a == 5 || b == 5 || c == 5)
+        else if (a == 6 || b == 6 || c == 6)
         {
             winType = SlotWinType.SingleJoker;
             multi = 1;

src/EllieBot/_common/ImageUrls.cs

@@ -8,7 +8,7 @@ namespace EllieBot.Common;
 public partial class ImageUrls : ICloneable<ImageUrls> 
 {
     [Comment("DO NOT CHANGE")]
-    public int Version { get; set; } = 5;
+    public int Version { get; set; } = 6;
 
     public CoinData Coins { get; set; }
     public Uri[] Currency { get; set; }

src/EllieBot/_common/Services/Currency/GamblingTxTracker.cs

@@ -88,6 +88,10 @@ public sealed class GamblingTxTracker : ITxTracker, IEService, IReadyExecutor
                 if (users.Count == 0)
                     continue;
 
+                // rakeback
+                var rakebacks = new Dictionary<ulong, decimal>();
+
+                // update userstats
                 foreach (var (k, x) in users.GroupBy(x => (x.UserId, x.Game))
                                             .ToDictionary(x => x.Key,
                                                 x => x.Aggregate((a, b) => new()
@@ -100,6 +104,10 @@ public sealed class GamblingTxTracker : ITxTracker, IEService, IReadyExecutor
                                                     MaxWin = Math.Max(a.MaxWin, b.MaxWin),
                                                 })))
                 {
+                    rakebacks.TryAdd(k.UserId, 0m);
+                    rakebacks[k.UserId] += x.TotalBet * GetHouseEdge(k.Game) * BASE_RAKEBACK;
+
+
                     // bulk upsert in the future
                     await using var uow = _db.GetDbContext();
                     await uow.GetTable<UserBetStats>()
@@ -129,6 +137,25 @@ public sealed class GamblingTxTracker : ITxTracker, IEService, IReadyExecutor
                                      Game = k.Game
                                  });
                 }
+
+                foreach (var (k, v) in rakebacks)
+                {
+                    await _db.GetDbContext()
+                             .GetTable<Rakeback>()
+                             .InsertOrUpdateAsync(() => new()
+                             {
+                                 UserId = k,
+                                 Amount = v
+                             },
+                                 (old) => new()
+                                 {
+                                     Amount = old.Amount + v
+                                 },
+                                 () => new()
+                                 {
+                                     UserId = k
+                                 });
+                }
             }
             catch (Exception ex)
             {
@@ -137,6 +164,8 @@ public sealed class GamblingTxTracker : ITxTracker, IEService, IReadyExecutor
         }
     }
 
+    private const decimal BASE_RAKEBACK = 0.05m;
+
     public Task TrackAdd(ulong userId, long amount, TxData? txData)
     {
         if (txData is null)
@@ -275,6 +304,19 @@ public sealed class GamblingTxTracker : ITxTracker, IEService, IReadyExecutor
                      .Where(x => x.UserId == userId && x.Game == game)
                      .ToListAsync();
     }
+
+    public decimal GetHouseEdge(GamblingGame game)
+        => game switch
+        {
+            GamblingGame.Betflip => 0.025m,
+            GamblingGame.Betroll => 0.04m,
+            GamblingGame.Betdraw => 0.04m,
+            GamblingGame.Slots => 0.034m,
+            GamblingGame.Blackjack => 0.02m,
+            GamblingGame.Lula => 0.025m,
+            GamblingGame.Race => 0.06m,
+            _ => 0
+        };
 }
 
 public sealed class UserBetStats
@@ -306,3 +348,9 @@ public enum GamblingGame
     Race = 6,
     AnimalRace = 6
 }
+
+public sealed class Rakeback
+{
+    public ulong UserId { get; set; }
+    public decimal Amount { get; set; }
+}

src/EllieBot/_common/Services/Impl/ImagesConfig.cs

@@ -27,5 +27,22 @@ public sealed class ImagesConfig : ConfigServiceBase<ImageUrls>
                 c.Version = 5;
             });
         }
+
+        if (data.Version < 6)
+        {
+            ModifyConfig(c =>
+            {
+                if (c.Slots.Emojis?.Length == 6)
+                {
+                    c.Slots.Emojis =
+                    [
+                        new("https://cdn.nadeko.bot/slots/15.png"),
+                        ..c.Slots.Emojis
+                    ];
+                }
+
+                c.Version = 6;
+            });
+        }
     }
 }

src/EllieBot/data/aliases.yml

@@ -1454,3 +1454,6 @@ translateflags:
   - trfl
   - fltr
   - transflags
+rakeback:
+  - rakeback
+  - rb

src/EllieBot/data/gambling.yml

@@ -1,5 +1,5 @@
 # DO NOT CHANGE
-version: 11
+version: 12
 # Currency settings
 currency:
   # What is the emoji/character which represents the currency
@@ -28,7 +28,7 @@ betRoll:
       multiplyBy: 10
     - whenAbove: 90
       multiplyBy: 4
-    - whenAbove: 66
+    - whenAbove: 65
       multiplyBy: 2
 # Automatic currency generation settings.
 generation:
@@ -85,7 +85,7 @@ luckyLadder:
     - 2.4
     - 1.7
     - 1.5
-    - 1.2
+    - 1.1
     - 0.5
     - 0.3
     - 0.2

src/EllieBot/data/images.yml

@@ -1,5 +1,5 @@
 # DO NOT CHANGE
-version: 5
+version: 6
 coins:
   heads:
     - https://cdn.nadeko.bot/coins/heads3.png
@@ -22,15 +22,13 @@ dice:
   - https://cdn.nadeko.bot/other/dice/9.png
 xp:
   bg: https://cdn.nadeko.bot/other/xp/bg_k.png
-rip:
-  bg: https://cdn.nadeko.bot/other/rip/rip.png
-  overlay: https://cdn.nadeko.bot/other/rip/overlay.png
 slots:
   emojis:
-    - https://cdn.nadeko.bot/slots/0.png
+    - https://cdn.nadeko.bot/slots/10.png
-    - https://cdn.nadeko.bot/slots/1.png
+    - https://cdn.nadeko.bot/slots/11.png
-    - https://cdn.nadeko.bot/slots/2.png
+    - https://cdn.nadeko.bot/slots/12.png
-    - https://cdn.nadeko.bot/slots/3.png
+    - https://cdn.nadeko.bot/slots/13.png
-    - https://cdn.nadeko.bot/slots/4.png
+    - https://cdn.nadeko.bot/slots/14.png
-    - https://cdn.nadeko.bot/slots/5.png
+    - https://cdn.nadeko.bot/slots/15.png
+    - https://cdn.nadeko.bot/slots/16.png
   bg: https://cdn.nadeko.bot/slots/slots_bg.png

src/EllieBot/data/strings/commands/commands.en-US.yml

@@ -4662,3 +4662,11 @@ betstats:
         desc: 'The game to show betstats for. Omit to show betstats for all games combined'
     - game:
         desc: 'The game to show betstats for. Omit to show betstats for all games combined'
+rakeback:
+  desc: |-
+    Try to claim any rakeback that you have avaialable.
+    Rakeback is accumulated by betting (not by winning or losing).
+    Default rakeback is 0.05 * house edge
+    House edge is defined per game
+  params:
+    - {}

src/EllieBot/data/strings/responses/responses.en-US.json

@@ -1114,5 +1114,8 @@
   "invalid_img_size": "Image must to be {0}x{1} pixels.",
   "no_attach_found": "No attachment found. Please send the image along with this command.",
   "trfl_enabled": "Flag translation enabled on this channel. Reacting to a message with a flag will translate it to that language.",
-  "trfl_disabled": "Flag translation disabled."
+  "trfl_disabled": "Flag translation disabled.",
+  "rakeback_claimed": "You've claimed {0} as rakeback!",
+  "rakeback_none": "You don't have any rakeback to claim yet.",
+  "rakeback_available": "You have {0} rakeback available. Click the button to claim."
 }