[Mainnet] Hashbattle Gaming Contract

Mainnet/HashBattle/HashBattle.sln

@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.31624.102
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HashBattle", "HashBattle\HashBattle.csproj", "{D711FA52-750E-481B-9BC5-2E07EBF58240}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HashBattleTest", "HashBattleTest\HashBattleTest.csproj", "{2A7F2670-A17F-46E6-BF35-A2C55BC7DCB1}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{D711FA52-750E-481B-9BC5-2E07EBF58240}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D711FA52-750E-481B-9BC5-2E07EBF58240}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D711FA52-750E-481B-9BC5-2E07EBF58240}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D711FA52-750E-481B-9BC5-2E07EBF58240}.Release|Any CPU.Build.0 = Release|Any CPU
+		{2A7F2670-A17F-46E6-BF35-A2C55BC7DCB1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2A7F2670-A17F-46E6-BF35-A2C55BC7DCB1}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2A7F2670-A17F-46E6-BF35-A2C55BC7DCB1}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{2A7F2670-A17F-46E6-BF35-A2C55BC7DCB1}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {88A96B52-6F00-40C9-AA28-C3D79E3BC0DF}
+	EndGlobalSection
+EndGlobal

Mainnet/HashBattle/HashBattle/Arena.cs

@@ -0,0 +1,271 @@
+using Stratis.SmartContracts;
+using System;
+using System.Text;
+
+/// <summary>
+/// A Stratis smart contract for running a game battle where owner will start the battle and maximum 4 users can enter a battle
+/// </summary>
+public class Arena : SmartContract
+{
+    private const uint MaxUsers = 4;
+    public struct BattleMain
+    {
+        public ulong BattleId;
+        public Address Winner;
+        public Address[] Users;
+        public ulong Fee;
+        public bool IsCancelled;
+    }
+    public struct BattleUser
+    {
+        public uint Score;
+        public bool ScoreSubmitted;
+    }
+    public struct BattleHighestScorer
+    {
+        public uint Score;
+        public Address[] Scorers;
+    }
+    public struct ClaimPendingDeployerOwnershipLog
+    {
+        [Index] public Address From;
+        [Index] public Address To;
+    }
+    public struct SetPendingDeployerOwnershipLog
+    {
+        [Index] public Address From;
+        [Index] public Address To;
+    }
+    public struct BattleEventLog
+    {
+        [Index] public string Event;
+        [Index] public ulong BattleId;
+        [Index] public Address Address;
+    }
+    /// <summary>
+    /// Set the address deploying the contract as battle owner
+    /// </summary>
+    public Address Owner
+    {
+        get => State.GetAddress(nameof(Owner));
+        private set => State.SetAddress(nameof(Owner), value);
+    }
+    public Address PendingOwner
+    {
+        get => State.GetAddress(nameof(PendingOwner));
+        private set => State.SetAddress(nameof(PendingOwner), value);
+    }
+    /// <summary>
+    /// Set the unique battleId of each battle
+    /// </summary>
+    public ulong NextBattleId
+    {
+        get => State.GetUInt64(nameof(NextBattleId));
+        private set => State.SetUInt64(nameof(NextBattleId), value);
+    }
+
+    public Arena(ISmartContractState smartContractState) : base(smartContractState)
+    {
+        Owner = Message.Sender;
+        NextBattleId = 1;
+    }
+    public void SetPendingOwnership(Address pendingOwner)
+    {
+        EnsureOwnerOnly();
+
+        PendingOwner = pendingOwner;
+
+        Log(new SetPendingDeployerOwnershipLog { From = Message.Sender, To = pendingOwner });
+    }
+    public void ClaimPendingOwnership()
+    {
+        var pendingOwner = PendingOwner;
+
+        Assert(Message.Sender == pendingOwner, "HASHBATTLE: UNAUTHORIZED");
+
+        var oldOwner = Owner;
+
+        Owner = pendingOwner;
+        PendingOwner = Address.Zero;
+
+        Log(new ClaimPendingDeployerOwnershipLog { From = oldOwner, To = pendingOwner });
+    }
+    /// <summary>
+    /// Battle owner will start the battle
+    /// </summary>
+    public ulong StartBattle(ulong fee)
+    {
+        Assert(Message.Sender == Owner, "Only battle owner can start game.");
+        Assert(fee < ulong.MaxValue / MaxUsers, "Fee is too high");
+
+        var battleId = NextBattleId;
+        NextBattleId += 1;
+
+        var battle = new BattleMain
+        {
+            BattleId = battleId,
+            Fee = fee,
+            Users = new Address[MaxUsers]
+        };
+        SetBattle(battleId, battle);
+
+        Log(new BattleEventLog { Event = "Start", BattleId = battleId, Address = Message.Sender });
+        return battleId;
+    }
+    /// <summary>
+    /// 4 different user will enter the battle
+    /// </summary>
+    public void EnterBattle(ulong battleId)
+    {
+        var battle = GetBattle(battleId);
+
+        Assert(battle.Winner == Address.Zero, "Battle not found.");
+
+        Assert(battle.Fee == Message.Value, "Battle fee is not matching with entry fee paid.");
+
+        var user = GetUser(battleId, Message.Sender);
+
+        Assert(!user.ScoreSubmitted, "The user already submitted score.");
+
+        SetUser(battleId, Message.Sender, user);
+
+        var userindex = GetUserIndex(battleId);
+        Assert(userindex != MaxUsers, "Max user reached for this battle.");
+        battle.Users.SetValue(Message.Sender, userindex);
+        SetUserIndex(battleId, (userindex + 1));
+
+        SetBattle(battleId, battle);
+
+        Log(new BattleEventLog { Event = "Enter", BattleId = battleId, Address = Message.Sender });
+    }
+    /// <summary>
+    /// 4 different user will end the battle and submit the score
+    /// </summary>
+    public void EndBattle(Address userAddress, ulong battleId, uint score)
+    {
+        Assert(Message.Sender == Owner, "Only battle owner can end game.");
+
+        var battle = GetBattle(battleId);
+
+        Assert(battle.Winner == Address.Zero, "Battle not found.");
+
+        var user = GetUser(battleId, userAddress);
+
+        Assert(!user.ScoreSubmitted, "The user already submitted score.");
+
+        user.Score = score;
+        user.ScoreSubmitted = true;
+
+        SetUser(battleId, userAddress, user);
+
+        var ScoreSubmittedCount = GetScoreSubmittedCount(battleId);
+        ScoreSubmittedCount += 1;
+        SetScoreSubmittedCount(battleId, ScoreSubmittedCount);
+
+        var highestScorer = GetHighestScorer(battleId);
+
+        if (score > highestScorer.Score)
+            SetHighestScorer(battleId, new BattleHighestScorer { Scorers = new Address[] { userAddress }, Score = score });
+        else if (score == highestScorer.Score)
+        {
+            var scorers = highestScorer.Scorers;
+            Array.Resize(ref scorers, scorers.Length + 1);
+            scorers[scorers.Length - 1] = userAddress;
+            SetHighestScorer(battleId, new BattleHighestScorer { Scorers = scorers, Score = score });
+        }
+
+        if (ScoreSubmittedCount == MaxUsers)
+        {
+            highestScorer = GetHighestScorer(battleId);
+            if (highestScorer.Scorers.Length > 1)
+                CancelBattle(battle);
+            else
+                ProcessWinner(battle, highestScorer.Scorers[0]);
+        }
+
+        Log(new BattleEventLog { Event = "End", BattleId = battleId, Address = Message.Sender });
+    }
+    /// <summary>
+    /// Get winner address
+    /// </summary>
+    public Address GetWinner(ulong battleId)
+    {
+        var battle = GetBattle(battleId);
+        return battle.Winner;
+    }
+    /// <summary>
+    /// Process winner when all user scores are submitted
+    /// </summary>
+    private void ProcessWinner(BattleMain battle, Address winnerAddress)
+    {
+        battle.Winner = winnerAddress;
+        SetBattle(battle.BattleId, battle);
+        ProcessPrize(battle);
+    }
+    /// <summary>
+    /// Send 3/4 amount to winner and 1/4 amount to battle owner
+    /// </summary>
+    private void ProcessPrize(BattleMain battle)
+    {
+        var prize = battle.Fee * (MaxUsers - 1);
+        Transfer(battle.Winner, prize);
+        Transfer(Owner, battle.Fee);
+    }
+    /// <summary>
+    /// Cancel battle and refund the fee amount
+    /// </summary>
+    private void CancelBattle(BattleMain battle)
+    {
+        battle.IsCancelled = true;
+        SetBattle(battle.BattleId, battle);
+
+        Transfer(battle.Users[0], battle.Fee);
+        Transfer(battle.Users[1], battle.Fee);
+        Transfer(battle.Users[2], battle.Fee);
+        Transfer(battle.Users[3], battle.Fee);
+    }
+    private void SetBattle(ulong battleId, BattleMain battle)
+    {
+        State.SetStruct($"battle:{battleId}", battle);
+    }
+    public BattleMain GetBattle(ulong battleId)
+    {
+        return State.GetStruct<BattleMain>($"battle:{battleId}");
+    }
+    private void SetUser(ulong battleId, Address address, BattleUser user)
+    {
+        State.SetStruct($"user:{battleId}-{address}", user);
+    }
+    public BattleUser GetUser(ulong battleId, Address address)
+    {
+        return State.GetStruct<BattleUser>($"user:{battleId}-{address}");
+    }
+    private void SetHighestScorer(ulong battleId, BattleHighestScorer highestScorer)
+    {
+        State.SetStruct($"scorer:{battleId}", highestScorer);
+    }
+    public BattleHighestScorer GetHighestScorer(ulong battleId)
+    {
+        return State.GetStruct<BattleHighestScorer>($"scorer:{battleId}");
+    }
+    private void SetUserIndex(ulong battleId, uint userindex)
+    {
+        State.SetUInt32($"user:{battleId}", userindex);
+    }
+    private uint GetUserIndex(ulong battleId)
+    {
+        return State.GetUInt32($"user:{battleId}");
+    }
+    private void SetScoreSubmittedCount(ulong battleId, uint scoresubmitcount)
+    {
+        State.SetUInt32($"scoresubmit:{battleId}", scoresubmitcount);
+    }
+    private uint GetScoreSubmittedCount(ulong battleId)
+    {
+        return State.GetUInt32($"scoresubmit:{battleId}");
+    }
+    private void EnsureOwnerOnly()
+    {
+        Assert(Message.Sender == Owner, "HASHBATTLE: UNAUTHORIZED");
+    }
+}

Mainnet/HashBattle/HashBattle/HashBattle.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
+
+	<LangVersion>8.0</LangVersion>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Stratis.SmartContracts" Version="2.0.0" />
+  </ItemGroup>
+</Project>