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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "../interfaces/IGame.sol";
import "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import "../interfaces/IUniversalCashier.sol";

contract DuckRace is IGame, PausableUpgradeable, Ownable2StepUpgradeable, ReentrancyGuardUpgradeable {
    // References
    address public proxyManager;
    IUniversalCashier public cashier;

    // Game Configuration
    uint256 public constant PLAY_COST = 1 ether;    // 1 S per duck
    uint256 public constant MIN_PLAYERS = 2;
    uint256 public constant MAX_PLAYERS = 100;
    uint256 public constant COMMIT_DURATION = 60 seconds;
    uint256 public constant RACE_DURATION = 60 seconds;
    uint256 public constant COOLDOWN_DURATION = 60 seconds;
    
    // Prize distribution
    uint256 public constant WINNER_SHARE = 90;  // 90% to winner
    uint256 public constant DEV_SHARE = 10;     // 10% to dev
    uint256 public totalFees;                   // Accumulated dev fees

    enum RaceState { 
        Waiting,    // Waiting for minimum players
        Committing, // Accepting commits for 60s
        Racing,     // Race in progress for 60s
        Completed,  // Race completed
        Cooldown    // 60s cooldown before next race
    }

    struct PreCommitment {
        uint256 ducksPerRace;
        uint256 racesRemaining;
        bytes32 commitHash;
        bytes32 salt;
    }

    // Game State
    struct Race {
        uint256 startTime;
        uint256 commitDeadline;
        uint256 raceDeadline;
        uint256 cooldownEnds;
        uint256 totalPrize;
        address winner;
        RaceState state;
        uint256 playerCount;
        mapping(address => bytes32) commitments;
        mapping(address => uint256) reveals;
        mapping(address => bool) hasRevealed;
        mapping(address => uint256) duckCounts;
        address[] players;
    }

    uint256 public currentRaceId;
    mapping(uint256 => Race) public races;
    mapping(address => PreCommitment) public preCommitments;
    
    // Random number generation
    uint256 private nonce;
    
    // Events
    event RaceCreated(uint256 indexed raceId);
    event CommitPhaseStarted(uint256 indexed raceId, uint256 deadline);
    event RaceStarted(uint256 indexed raceId, uint256 deadline);
    event RaceCompleted(uint256 indexed raceId, address winner, uint256 prize);
    event PlayerCommitted(uint256 indexed raceId, address indexed player, uint256 duckCount);
    event PreCommitmentSet(address indexed player, uint256 ducksPerRace, uint256 races);
    event FeeWithdrawn(uint256 amount);

    function initialize(address _proxyManager, address _cashier) public initializer {
        __Pausable_init();
        __Ownable2Step_init();
        __ReentrancyGuard_init();
        proxyManager = _proxyManager;
        cashier = IUniversalCashier(_cashier);
        currentRaceId = 0;
    }

    // Pre-commit to multiple races
    function setPreCommitment(
        uint256 ducksPerRace, 
        uint256 numberOfRaces,
        bytes32 commitHash,
        bytes32 salt
    ) external whenNotPaused nonReentrant {
        require(ducksPerRace > 0 && ducksPerRace <= 10, "Invalid duck count");
        require(numberOfRaces > 0 && numberOfRaces <= 100, "Invalid race count");
        
        uint256 totalCost = PLAY_COST * ducksPerRace * numberOfRaces;
        require(cashier.getBalance(msg.sender) >= totalCost, "Insufficient balance");

        preCommitments[msg.sender] = PreCommitment({
            ducksPerRace: ducksPerRace,
            racesRemaining: numberOfRaces,
            commitHash: commitHash,
            salt: salt
        });

        emit PreCommitmentSet(msg.sender, ducksPerRace, numberOfRaces);
    }

    // Single race commit
    function commit(bytes32 commitHash, bytes32 salt, uint256 duckCount) 
        external 
        payable 
        whenNotPaused 
        nonReentrant 
    {
        require(duckCount > 0 && duckCount <= 10, "Invalid duck count");
        uint256 cost = PLAY_COST * duckCount;
        require(cashier.debitPlayer(msg.sender, cost), "Payment failed");

        _processCommit(msg.sender, commitHash, salt, duckCount);
    }

    // Process commit (used by both pre-commit and regular commit)
    function _processCommit(
        address player,
        bytes32 commitHash,
        bytes32 salt,
        uint256 duckCount
    ) private {
        if (currentRaceId == 0 || races[currentRaceId].state == RaceState.Completed) {
            _createNewRace();
        }
        
        Race storage race = races[currentRaceId];
        require(race.state == RaceState.Waiting || race.state == RaceState.Committing, "Race not accepting commits");
        require(race.playerCount < MAX_PLAYERS, "Race full");

        if (race.duckCounts[player] == 0) {
            race.players.push(player);
            race.playerCount++;
        }

        race.commitments[player] = keccak256(abi.encodePacked(commitHash, salt, player));
        race.duckCounts[player] += duckCount;
        race.totalPrize += PLAY_COST * duckCount;

        // Start commit phase if minimum players reached
        if (race.playerCount >= MIN_PLAYERS && race.state == RaceState.Waiting) {
            _startCommitPhase(currentRaceId);
        }

        emit PlayerCommitted(currentRaceId, player, duckCount);
    }

    // Auto-process pre-commitments
    function processPreCommitments() external {
        PreCommitment storage pc = preCommitments[msg.sender];
        require(pc.racesRemaining > 0, "No pre-commitments");
        require(pc.ducksPerRace > 0, "Invalid pre-commitment");

        uint256 cost = PLAY_COST * pc.ducksPerRace;
        require(cashier.debitPlayer(msg.sender, cost), "Payment failed");

        _processCommit(msg.sender, pc.commitHash, pc.salt, pc.ducksPerRace);
        pc.racesRemaining--;

        if (pc.racesRemaining == 0) {
            delete preCommitments[msg.sender];
        }
    }

    // Reveal phase
    function reveal(uint256 seed, bytes32 salt) external nonReentrant whenNotPaused {
        Race storage race = races[currentRaceId];
        require(race.state == RaceState.Racing, "Not reveal phase");
        require(!race.hasRevealed[msg.sender], "Already revealed");
        
        bytes32 computedHash = keccak256(abi.encodePacked(seed, salt, msg.sender));
        require(computedHash == race.commitments[msg.sender], "Invalid reveal");

        race.reveals[msg.sender] = seed;
        race.hasRevealed[msg.sender] = true;
    }

    function finalize(uint256 raceId) public {
        Race storage race = races[raceId];
        require(race.state == RaceState.Racing, "Race not in progress");
        require(block.timestamp > race.raceDeadline, "Race still in progress");

        // Calculate combined seed from all reveals
        bytes32 combinedSeed;
        uint256 revealCount;
        for (uint256 i = 0; i < race.players.length; i++) {
            address player = race.players[i];
            if (race.hasRevealed[player]) {
                combinedSeed ^= bytes32(race.reveals[player]);
                revealCount++;
            }
        }

        require(revealCount >= MIN_PLAYERS, "Not enough reveals");

        // Generate winner
        uint256 randomNumber = uint256(keccak256(abi.encodePacked(
            combinedSeed,
            block.prevrandao,
            block.timestamp
        )));

        // Weight by duck count
        uint256 totalDucks;
        for (uint256 i = 0; i < race.players.length; i++) {
            if (race.hasRevealed[race.players[i]]) {
                totalDucks += race.duckCounts[race.players[i]];
            }
        }

        uint256 winningNumber = randomNumber % totalDucks;
        uint256 currentSum;

        // Find winner
        for (uint256 i = 0; i < race.players.length; i++) {
            address player = race.players[i];
            if (race.hasRevealed[player]) {
                currentSum += race.duckCounts[player];
                if (winningNumber < currentSum) {
                    race.winner = player;
                    break;
                }
            }
        }

        // Distribute prize
        if (race.winner != address(0)) {
            uint256 winnerPrize = (race.totalPrize * WINNER_SHARE) / 100;
            uint256 devFee = race.totalPrize - winnerPrize;
            
            totalFees += devFee;
            cashier.creditPlayer{value: winnerPrize}(race.winner, winnerPrize);
            
            emit RaceCompleted(raceId, race.winner, winnerPrize);
        }

        race.state = RaceState.Cooldown;
        race.cooldownEnds = block.timestamp + COOLDOWN_DURATION;
    }

    // Admin functions
    function withdrawFees() external onlyOwner {
        uint256 amount = totalFees;
        totalFees = 0;
        (bool success, ) = owner().call{value: amount}("");
        require(success, "Fee transfer failed");
        emit FeeWithdrawn(amount);
    }

    function _createNewRace() private {
        currentRaceId++;
        Race storage race = races[currentRaceId];
        race.startTime = block.timestamp;
        race.state = RaceState.Waiting;
        emit RaceCreated(currentRaceId);
    }

    function _startCommitPhase(uint256 raceId) private {
        Race storage race = races[raceId];
        race.state = RaceState.Committing;
        race.commitDeadline = block.timestamp + COMMIT_DURATION;
        emit CommitPhaseStarted(raceId, race.commitDeadline);
    }

    function _startRace(uint256 raceId) private {
        Race storage race = races[raceId];
        race.state = RaceState.Racing;
        race.raceDeadline = block.timestamp + RACE_DURATION;
        emit RaceStarted(raceId, race.raceDeadline);
    }

    // View functions
    function getCurrentRaceState() external view returns (
        uint256 raceId,
        RaceState state,
        uint256 playerCount,
        uint256 totalPrize,
        uint256 deadline
    ) {
        Race storage race = races[currentRaceId];
        deadline = race.state == RaceState.Committing ? race.commitDeadline :
                  race.state == RaceState.Racing ? race.raceDeadline :
                  race.state == RaceState.Cooldown ? race.cooldownEnds : 0;
                  
        return (
            currentRaceId,
            race.state,
            race.playerCount,
            race.totalPrize,
            deadline
        );
    }

    function getRacePlayerInfo(uint256 raceId, address player) external view returns (
        uint256 duckCount,
        bool hasCommitted,
        bool isWinner
    ) {
        Race storage race = races[raceId];
        return (
            race.duckCounts[player],
            race.duckCounts[player] > 0,
            race.winner == player
        );
    }

    // Add the play function implementation
    function play(address player, uint256 amount) external payable override {
        require(msg.sender == proxyManager, "Only proxy manager");
        require(amount >= PLAY_COST, "Minimum 1 duck");
        
        uint256 duckCount = amount / PLAY_COST;
        require(duckCount <= 10, "Maximum 10 ducks per play");

        if (currentRaceId == 0 || races[currentRaceId].state == RaceState.Completed) {
            _createNewRace();
        }
        
        Race storage race = races[currentRaceId];
        require(race.state == RaceState.Waiting || race.state == RaceState.Committing, 
            "Race not accepting commits");
        require(race.playerCount < MAX_PLAYERS, "Race full");

        if (race.duckCounts[player] == 0) {
            race.players.push(player);
            race.playerCount++;
        }

        race.duckCounts[player] += duckCount;
        race.totalPrize += amount;

        // Start commit phase if minimum players reached
        if (race.playerCount >= MIN_PLAYERS && race.state == RaceState.Waiting) {
            _startCommitPhase(currentRaceId);
        }

        emit PlayerCommitted(currentRaceId, player, duckCount);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)

pragma solidity ^0.8.0;

import "./OwnableUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {
    address private _pendingOwner;

    event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);

    function __Ownable2Step_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable2Step_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Returns the address of the pending owner.
     */
    function pendingOwner() public view virtual returns (address) {
        return _pendingOwner;
    }

    /**
     * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual override onlyOwner {
        _pendingOwner = newOwner;
        emit OwnershipTransferStarted(owner(), newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual override {
        delete _pendingOwner;
        super._transferOwnership(newOwner);
    }

    /**
     * @dev The new owner accepts the ownership transfer.
     */
    function acceptOwnership() public virtual {
        address sender = _msgSender();
        require(pendingOwner() == sender, "Ownable2Step: caller is not the new owner");
        _transferOwnership(sender);
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized != type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    function __Pausable_init() internal onlyInitializing {
        __Pausable_init_unchained();
    }

    function __Pausable_init_unchained() internal onlyInitializing {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuardUpgradeable is Initializable {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    function __ReentrancyGuard_init() internal onlyInitializing {
        __ReentrancyGuard_init_unchained();
    }

    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)

pragma solidity ^0.8.0;
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

interface IGame {
    function play(address player, uint256 amount) external payable;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

interface IUniversalCashier {
    function deposit() external payable;
    function withdraw(uint256 amount) external;
    function debitPlayer(address player, uint256 amount) external returns (bool);
    function creditPlayer(address player, uint256 amount) external payable;
    function getBalance(address player) external view returns (uint256);
    function authorizeGame(address game, bool status) external;
    function setTreasury(address _treasury) external;
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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IUniversalCashier","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"commitHash","type":"bytes32"},{"internalType":"bytes32","name":"salt","type":"bytes32"},{"internalType":"uint256","name":"duckCount","type":"uint256"}],"name":"commit","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"currentRaceId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"raceId","type":"uint256"}],"name":"finalize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getCurrentRaceState","outputs":[{"internalType":"uint256","name":"raceId","type":"uint256"},{"internalType":"enum DuckRace.RaceState","name":"state","type":"uint8"},{"internalType":"uint256","name":"playerCount","type":"uint256"},{"internalType":"uint256","name":"totalPrize","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"raceId","type":"uint256"},{"internalType":"address","name":"player","type":"address"}],"name":"getRacePlayerInfo","outputs":[{"internalType":"uint256","name":"duckCount","type":"uint256"},{"internalType":"bool","name":"hasCommitted","type":"bool"},{"internalType":"bool","name":"isWinner","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_proxyManager","type":"address"},{"internalType":"address","name":"_cashier","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"player","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"play","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"preCommitments","outputs":[{"internalType":"uint256","name":"ducksPerRace","type":"uint256"},{"internalType":"uint256","name":"racesRemaining","type":"uint256"},{"internalType":"bytes32","name":"commitHash","type":"bytes32"},{"internalType":"bytes32","name":"salt","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"processPreCommitments","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"proxyManager","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"races","outputs":[{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"commitDeadline","type":"uint256"},{"internalType":"uint256","name":"raceDeadline","type":"uint256"},{"internalType":"uint256","name":"cooldownEnds","type":"uint256"},{"internalType":"uint256","name":"totalPrize","type":"uint256"},{"internalType":"address","name":"winner","type":"address"},{"internalType":"enum DuckRace.RaceState","name":"state","type":"uint8"},{"internalType":"uint256","name":"playerCount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"seed","type":"uint256"},{"internalType":"bytes32","name":"salt","type":"bytes32"}],"name":"reveal","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"ducksPerRace","type":"uint256"},{"internalType":"uint256","name":"numberOfRaces","type":"uint256"},{"internalType":"bytes32","name":"commitHash","type":"bytes32"},{"internalType":"bytes32","name":"salt","type":"bytes32"}],"name":"setPreCommitment","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalFees","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawFees","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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