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- Certainly! Below is a simple C# class that implements a provably fair dice roll system. The `RollResult` method accepts a multiplier, an optional nonce, and a house edge with a default value of 1.0. It uses SHA256 for hashing the combined seeds to ensure fairness.
- ```csharp
- using System;
- using System.Security.Cryptography;
- using System.Text;
- public class ProvablyFairDice
- {
- public string PublicSeed { get; set; }
- public string PrivateSeed { get; set; }
- public int Nonce { get; set; }
- public ProvablyFairDice(string publicSeed, string privateSeed)
- {
- PublicSeed = publicSeed;
- PrivateSeed = privateSeed;
- Nonce = 0; // Default starting nonce
- }
- public double RollResult(double multiplier, int? nonce = null, double houseEdge = 1.0)
- {
- // Use the provided nonce or the class's nonce property if not set
- int usedNonce = nonce ?? Nonce;
- // Increment the nonce for the next roll
- Nonce++;
- // Combine the seeds with the nonce to get the roll hash
- string rollHash = CreateHash($"{PublicSeed}:{PrivateSeed}:{usedNonce}");
- // Convert the hash to a roll number
- double rollNumber = ConvertHashToRollNumber(rollHash);
- // Calculate the result with the house edge and multiplier
- double result = rollNumber * (100 - houseEdge) * multiplier;
- return result;
- }
- private string CreateHash(string input)
- {
- using (SHA256 sha256Hash = SHA256.Create())
- {
- // ComputeHash - returns byte array
- byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(input));
- // Convert byte array to a string
- StringBuilder builder = new StringBuilder();
- for (int i = 0; i < bytes.Length; i++)
- {
- builder.Append(bytes[i].ToString("x2"));
- }
- return builder.ToString();
- }
- }
- private double ConvertHashToRollNumber(string hash)
- {
- // Take the first 8 characters of the hash and convert them to a decimal
- string subHash = hash.Substring(0, 8);
- long decimalValue = Convert.ToInt64(subHash, 16);
- // Convert the decimal to a number between 0 and 100
- double rollNumber = (decimalValue / (double)UInt32.MaxValue) * 100;
- return rollNumber;
- }
- }
- ```
- This class uses the SHA256 hashing algorithm to ensure the fairness of the dice roll. The `RollResult` method calculates the result based on the combined seeds and nonce, applies the house edge, and then multiplies it by the given multiplier. The `Nonce` property is incremented after each roll to ensure that each roll is unique.
- Please note that this is a basic implementation and might need further adjustments based on your specific requirements, such as integrating with a database for seed management or adding additional security measures. Also, ensure that you're in compliance with any legal regulations regarding gambling and online games in your jurisdiction.
- Source: Conversation with Bing, 4/22/2024
- (1) github.com. https://github.com/sownthunder/Back_2_Da_Future/tree/f6bcd431cc77ba7d931c679ffa3d59db55dd36e4/New%20Unity%20Project%2FAssets%2FEasy%20Secure%20-%20Coins%2C%20Gems%2FScripts%2FClasses%2FSystem%2FSecurityClass.cs.
- (2) github.com. https://github.com/neyhos-studio/LauncherBack/tree/552d4d45bd4f16ddd2c70fd0f300caf6e645e203/Helpers%2FShaHash.cs.
- (3) github.com. https://github.com/YajKMA/Zeiterfassung/tree/afb7955598530d2a9be557e6b33ff90d5c356e22/Security%2FHashing.cs.
- (4) github.com. https://github.com/UtrackiWiktor/HomeOffice/tree/02873f46fa6d5f4033626132a159fab83bb06929/HomeOffice%2Fclasses%2FPasswords%2FPassword.cs.
- (5) github.com. https://github.com/ShareNewsLLC/ShareNewsMVC/tree/56fbfa3c6641945f117a5181ca623c59da070176/MVC%2FControllers%2FAdminController.cs.
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