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cleancoindev/High-Stakes Roulette Example

Forked from gorgos/High-Stakes Roulette Example
Created July 17, 2023 03:07
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Revisions

  1. @gorgos gorgos revised this gist Jan 31, 2021. 1 changed file with 2 additions and 1 deletion.
    3 changes: 2 additions & 1 deletion High-Stakes Roulette Example
    View file
    Original file line number Diff line number Diff line change
    @@ -76,6 +76,8 @@ contract Roulette is BankOwned {
    gameRounds[msg.sender].userValue = userValue;
    gameRounds[msg.sender].hasUserBetOnRed = hasUserBetOnRed;
    gameRounds[msg.sender].lockedFunds = _betAmount * 2;
    gameRounds[userAddress].timeWhenSecretUserValueSubmitted = block.timestamp;

    registeredFunds[msg.sender] -= _betAmount;
    registeredFunds[bankAddress] -= _betAmount;
    }
    @@ -86,7 +88,6 @@ contract Roulette is BankOwned {
    require(keccak256(abi.encodePacked(bankSecretValue)) == gameRounds[userAddress].bankHash, "Bank reveal not matching commitment");

    gameRounds[userAddress].bankSecretValue = bankSecretValue;
    gameRounds[userAddress].timeWhenSecretUserValueSubmitted = block.timestamp;

    _evaluateBet(userAddress);
    _resetContractFor(userAddress);
  2. @gorgos gorgos created this gist Jan 30, 2021.
    128 changes: 128 additions & 0 deletions High-Stakes Roulette Example
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,128 @@
    // SPDX-License-Identifier: MIT
    pragma solidity ^0.8.0;

    contract BankOwned {
    address public bankAddress;

    constructor() {
    bankAddress = msg.sender;
    }

    modifier onlyOwner {
    require(msg.sender == bankAddress);
    _;
    }
    }

    contract Roulette is BankOwned {
    uint256 public immutable TIMEOUT_FOR_BANK_REVEAL = 1 days;
    uint256 public immutable ROULETTE_NUMBER_COUNT = 37;

    // prettier-ignore
    bool[37] isNumberRed = [false, true, false, true, false, true, false, true, false, true, false, false, true, false, true, false, true, false, true, true, false, true, false, true, false, true, false, true, false, false, true, false, true, false, true, false, true];

    struct GameRound {
    bytes32 bankHash;
    uint256 bankSecretValue;
    uint256 userValue;
    bool hasUserBetOnRed;
    uint256 timeWhenSecretUserValueSubmitted;
    uint256 lockedFunds;
    }

    mapping(address => bool) public hasRequestedGame;
    mapping(address => GameRound) public gameRounds;
    mapping(address => uint256) public registeredFunds;

    event NewGameRequest(address indexed user);

    function increaseFunds() external payable {
    require(msg.value > 0, "Must send ETH");
    registeredFunds[msg.sender] += msg.value;
    }

    function withdrawMoney() external {
    require(registeredFunds[msg.sender] > 0);

    uint256 funds = registeredFunds[msg.sender];
    registeredFunds[msg.sender] = 0;

    (bool wasSuccessful, ) = msg.sender.call{value: funds}("");
    require(wasSuccessful, "ETH transfer failed");
    }

    function initializeGame() external {
    require(!hasRequestedGame[msg.sender], "Already requested game");

    hasRequestedGame[msg.sender] = true;
    emit NewGameRequest(msg.sender);
    }

    function setInitialBankHash(bytes32 bankHash, address userAddress) external onlyOwner {
    require(gameRounds[userAddress].bankHash == 0x0, "Bank hash already set");
    gameRounds[userAddress].bankHash = bankHash;
    }

    function placeBet(
    bool hasUserBetOnRed,
    uint256 userValue,
    uint256 _betAmount
    ) external {
    require(gameRounds[msg.sender].bankHash != 0x0, "Bank hash not yet set");
    require(userValue == 0, "Already placed bet");
    require(registeredFunds[bankAddress] >= _betAmount, "Not enough bank funds");
    require(registeredFunds[msg.sender] >= _betAmount, "Not enough user funds");

    gameRounds[msg.sender].userValue = userValue;
    gameRounds[msg.sender].hasUserBetOnRed = hasUserBetOnRed;
    gameRounds[msg.sender].lockedFunds = _betAmount * 2;
    registeredFunds[msg.sender] -= _betAmount;
    registeredFunds[bankAddress] -= _betAmount;
    }

    function sendBankSecretValue(uint256 bankSecretValue, address userAddress) external {
    require(gameRounds[userAddress].userValue != 0, "User has no value set");
    require(gameRounds[userAddress].bankSecretValue == 0, "Already revealed");
    require(keccak256(abi.encodePacked(bankSecretValue)) == gameRounds[userAddress].bankHash, "Bank reveal not matching commitment");

    gameRounds[userAddress].bankSecretValue = bankSecretValue;
    gameRounds[userAddress].timeWhenSecretUserValueSubmitted = block.timestamp;

    _evaluateBet(userAddress);
    _resetContractFor(userAddress);

    gameRounds[userAddress].bankHash = bytes32(bankSecretValue);
    }

    function checkBankSecretValueTimeout() external {
    require(gameRounds[msg.sender].bankHash != 0, "Bank hash not set");
    require(gameRounds[msg.sender].bankSecretValue == 0, "Bank secret is set");
    require(gameRounds[msg.sender].userValue != 0, "User value not set");
    require(block.timestamp > (gameRounds[msg.sender].timeWhenSecretUserValueSubmitted + TIMEOUT_FOR_BANK_REVEAL), "Timeout not yet reached");

    registeredFunds[msg.sender] += gameRounds[msg.sender].lockedFunds;
    _resetContractFor(msg.sender);
    }

    function _resetContractFor(address userAddress) private {
    gameRounds[userAddress] = GameRound(0x0, 0, 0, false, 0, 0);
    }

    function _evaluateBet(address userAddress) private {
    uint256 random = gameRounds[userAddress].bankSecretValue ^ gameRounds[userAddress].userValue;
    uint256 number = random % ROULETTE_NUMBER_COUNT;
    uint256 winningAmount = gameRounds[userAddress].lockedFunds;

    bool isNeitherRedNorBlack = number == 0;
    bool isRed = isNumberRed[number];
    bool hasUserBetOnRed = gameRounds[userAddress].hasUserBetOnRed;

    address winner;

    if (isNeitherRedNorBlack) winner = bankAddress;
    else if (isRed == hasUserBetOnRed) winner = userAddress;
    else winner = bankAddress;

    registeredFunds[winner] += winningAmount;
    }
    }