BettingManager

{{
  "language": "Solidity",
  "sources": {
    "@openzeppelin/contracts/access/Ownable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.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.
 *
 * The initial owner is set to the address provided by the deployer. 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 Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @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 {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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);
    }
}
"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}
"
    },
    "@openzeppelin/contracts/utils/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @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 Context {
    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;
    }
}
"
    },
    "lib/chainlink-brownie-contracts/contracts/src/v0.8/shared/interfaces/LinkTokenInterface.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// solhint-disable-next-line interface-starts-with-i
interface LinkTokenInterface {
  function allowance(address owner, address spender) external view returns (uint256 remaining);

  function approve(address spender, uint256 value) external returns (bool success);

  function balanceOf(address owner) external view returns (uint256 balance);

  function decimals() external view returns (uint8 decimalPlaces);

  function decreaseApproval(address spender, uint256 addedValue) external returns (bool success);

  function increaseApproval(address spender, uint256 subtractedValue) external;

  function name() external view returns (string memory tokenName);

  function symbol() external view returns (string memory tokenSymbol);

  function totalSupply() external view returns (uint256 totalTokensIssued);

  function transfer(address to, uint256 value) external returns (bool success);

  function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool success);

  function transferFrom(address from, address to, uint256 value) external returns (bool success);
}
"
    },
    "lib/chainlink-brownie-contracts/contracts/src/v0.8/vrf/dev/interfaces/IVRFV2PlusWrapper.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IVRFV2PlusWrapper {
  /**
   * @return the request ID of the most recent VRF V2 request made by this wrapper. This should only
   * be relied option within the same transaction that the request was made.
   */
  function lastRequestId() external view returns (uint256);

  /**
   * @notice Calculates the price of a VRF request with the given callbackGasLimit at the current
   * @notice block.
   *
   * @dev This function relies on the transaction gas price which is not automatically set during
   * @dev simulation. To estimate the price at a specific gas price, use the estimatePrice function.
   *
   * @param _callbackGasLimit is the gas limit used to estimate the price.
   * @param _numWords is the number of words to request.
   */
  function calculateRequestPrice(uint32 _callbackGasLimit, uint32 _numWords) external view returns (uint256);

  /**
   * @notice Calculates the price of a VRF request in native with the given callbackGasLimit at the current
   * @notice block.
   *
   * @dev This function relies on the transaction gas price which is not automatically set during
   * @dev simulation. To estimate the price at a specific gas price, use the estimatePrice function.
   *
   * @param _callbackGasLimit is the gas limit used to estimate the price.
   * @param _numWords is the number of words to request.
   */
  function calculateRequestPriceNative(uint32 _callbackGasLimit, uint32 _numWords) external view returns (uint256);

  /**
   * @notice Estimates the price of a VRF request with a specific gas limit and gas price.
   *
   * @dev This is a convenience function that can be called in simulation to better understand
   * @dev pricing.
   *
   * @param _callbackGasLimit is the gas limit used to estimate the price.
   * @param _numWords is the number of words to request.
   * @param _requestGasPriceWei is the gas price in wei used for the estimation.
   */
  function estimateRequestPrice(
    uint32 _callbackGasLimit,
    uint32 _numWords,
    uint256 _requestGasPriceWei
  ) external view returns (uint256);

  /**
   * @notice Estimates the price of a VRF request in native with a specific gas limit and gas price.
   *
   * @dev This is a convenience function that can be called in simulation to better understand
   * @dev pricing.
   *
   * @param _callbackGasLimit is the gas limit used to estimate the price.
   * @param _numWords is the number of words to request.
   * @param _requestGasPriceWei is the gas price in wei used for the estimation.
   */
  function estimateRequestPriceNative(
    uint32 _callbackGasLimit,
    uint32 _numWords,
    uint256 _requestGasPriceWei
  ) external view returns (uint256);

  /**
   * @notice Requests randomness from the VRF V2 wrapper, paying in native token.
   *
   * @param _callbackGasLimit is the gas limit for the request.
   * @param _requestConfirmations number of request confirmations to wait before serving a request.
   * @param _numWords is the number of words to request.
   */
  function requestRandomWordsInNative(
    uint32 _callbackGasLimit,
    uint16 _requestConfirmations,
    uint32 _numWords,
    bytes calldata extraArgs
  ) external payable returns (uint256 requestId);

  function link() external view returns (address);
  function linkNativeFeed() external view returns (address);
}
"
    },
    "lib/chainlink-brownie-contracts/contracts/src/v0.8/vrf/dev/libraries/VRFV2PlusClient.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

// End consumer library.
library VRFV2PlusClient {
  // extraArgs will evolve to support new features
  bytes4 public constant EXTRA_ARGS_V1_TAG = bytes4(keccak256("VRF ExtraArgsV1"));
  struct ExtraArgsV1 {
    bool nativePayment;
  }

  struct RandomWordsRequest {
    bytes32 keyHash;
    uint256 subId;
    uint16 requestConfirmations;
    uint32 callbackGasLimit;
    uint32 numWords;
    bytes extraArgs;
  }

  function _argsToBytes(ExtraArgsV1 memory extraArgs) internal pure returns (bytes memory bts) {
    return abi.encodeWithSelector(EXTRA_ARGS_V1_TAG, extraArgs);
  }
}
"
    },
    "lib/chainlink-brownie-contracts/contracts/src/v0.8/vrf/dev/VRFV2PlusWrapperConsumerBase.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {LinkTokenInterface} from "../../shared/interfaces/LinkTokenInterface.sol";
import {IVRFV2PlusWrapper} from "./interfaces/IVRFV2PlusWrapper.sol";

/**
 *
 * @notice Interface for contracts using VRF randomness through the VRF V2 wrapper
 * ********************************************************************************
 * @dev PURPOSE
 *
 * @dev Create VRF V2+ requests without the need for subscription management. Rather than creating
 * @dev and funding a VRF V2+ subscription, a user can use this wrapper to create one off requests,
 * @dev paying up front rather than at fulfillment.
 *
 * @dev Since the price is determined using the gas price of the request transaction rather than
 * @dev the fulfillment transaction, the wrapper charges an additional premium on callback gas
 * @dev usage, in addition to some extra overhead costs associated with the VRFV2Wrapper contract.
 * *****************************************************************************
 * @dev USAGE
 *
 * @dev Calling contracts must inherit from VRFV2PlusWrapperConsumerBase. The consumer must be funded
 * @dev with enough LINK or ether to make the request, otherwise requests will revert. To request randomness,
 * @dev call the 'requestRandomWords' function with the desired VRF parameters. This function handles
 * @dev paying for the request based on the current pricing.
 *
 * @dev Consumers must implement the fullfillRandomWords function, which will be called during
 * @dev fulfillment with the randomness result.
 */
abstract contract VRFV2PlusWrapperConsumerBase {
  error OnlyVRFWrapperCanFulfill(address have, address want);

  LinkTokenInterface internal immutable i_linkToken;
  IVRFV2PlusWrapper public immutable i_vrfV2PlusWrapper;

  /**
   * @param _vrfV2PlusWrapper is the address of the VRFV2Wrapper contract
   */
  constructor(address _vrfV2PlusWrapper) {
    IVRFV2PlusWrapper vrfV2PlusWrapper = IVRFV2PlusWrapper(_vrfV2PlusWrapper);

    i_linkToken = LinkTokenInterface(vrfV2PlusWrapper.link());
    i_vrfV2PlusWrapper = vrfV2PlusWrapper;
  }

  /**
   * @dev Requests randomness from the VRF V2+ wrapper.
   *
   * @param _callbackGasLimit is the gas limit that should be used when calling the consumer's
   *        fulfillRandomWords function.
   * @param _requestConfirmations is the number of confirmations to wait before fulfilling the
   *        request. A higher number of confirmations increases security by reducing the likelihood
   *        that a chain re-org changes a published randomness outcome.
   * @param _numWords is the number of random words to request.
   *
   * @return requestId is the VRF V2+ request ID of the newly created randomness request.
   */
  // solhint-disable-next-line chainlink-solidity/prefix-internal-functions-with-underscore
  function requestRandomness(
    uint32 _callbackGasLimit,
    uint16 _requestConfirmations,
    uint32 _numWords,
    bytes memory extraArgs
  ) internal returns (uint256 requestId, uint256 reqPrice) {
    reqPrice = i_vrfV2PlusWrapper.calculateRequestPrice(_callbackGasLimit, _numWords);
    i_linkToken.transferAndCall(
      address(i_vrfV2PlusWrapper),
      reqPrice,
      abi.encode(_callbackGasLimit, _requestConfirmations, _numWords, extraArgs)
    );
    return (i_vrfV2PlusWrapper.lastRequestId(), reqPrice);
  }

  // solhint-disable-next-line chainlink-solidity/prefix-internal-functions-with-underscore
  function requestRandomnessPayInNative(
    uint32 _callbackGasLimit,
    uint16 _requestConfirmations,
    uint32 _numWords,
    bytes memory extraArgs
  ) internal returns (uint256 requestId, uint256 requestPrice) {
    requestPrice = i_vrfV2PlusWrapper.calculateRequestPriceNative(_callbackGasLimit, _numWords);
    return (
      i_vrfV2PlusWrapper.requestRandomWordsInNative{value: requestPrice}(
        _callbackGasLimit,
        _requestConfirmations,
        _numWords,
        extraArgs
      ),
      requestPrice
    );
  }

  /**
   * @notice fulfillRandomWords handles the VRF V2 wrapper response. The consuming contract must
   * @notice implement it.
   *
   * @param _requestId is the VRF V2 request ID.
   * @param _randomWords is the randomness result.
   */
  // solhint-disable-next-line chainlink-solidity/prefix-internal-functions-with-underscore
  function fulfillRandomWords(uint256 _requestId, uint256[] memory _randomWords) internal virtual;

  function rawFulfillRandomWords(uint256 _requestId, uint256[] memory _randomWords) external {
    address vrfWrapperAddr = address(i_vrfV2PlusWrapper);
    if (msg.sender != vrfWrapperAddr) {
      revert OnlyVRFWrapperCanFulfill(msg.sender, vrfWrapperAddr);
    }
    fulfillRandomWords(_requestId, _randomWords);
  }

  /// @notice getBalance returns the native balance of the consumer contract
  function getBalance() public view returns (uint256) {
    return address(this).balance;
  }

  /// @notice getLinkToken returns the link token contract
  function getLinkToken() public view returns (LinkTokenInterface) {
    return i_linkToken;
  }
}
"
    },
    "src/BettingManager.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import {VRFV2PlusWrapperConsumerBase} from "lib/chainlink-brownie-contracts/contracts/src/v0.8/vrf/dev/VRFV2PlusWrapperConsumerBase.sol";
import {VRFV2PlusClient} from "lib/chainlink-brownie-contracts/contracts/src/v0.8/vrf/dev/libraries/VRFV2PlusClient.sol";
import {LinkTokenInterface} from "lib/chainlink-brownie-contracts/contracts/src/v0.8/shared/interfaces/LinkTokenInterface.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import "./ICoinFlipBetting.sol";

contract BettingManager is VRFV2PlusWrapperConsumerBase, Ownable {
    // Chainlink VRF Configuration for Direct Funding (from official docs)
    uint32 public callbackGasLimit = 300000;
    uint16 public requestConfirmations = 3;
    uint32 public numWords = 1;
    
    address public linkAddress;
    address public wrapperAddress;

    // Manager State
    address public factory;
    uint256 private nextRequestId = 1;

    // VRF Request tracking
    struct RequestStatus {
        uint256 paid;
        bool fulfilled;
        uint256[] randomWords;
        uint256 betId;
        address player1;
        address player2;
        address bettingContract; // Add this field
    }
    
    mapping(uint256 => RequestStatus) public s_requests;
    uint256[] public requestIds;
    uint256 public lastRequestId;

    // Mappings
    mapping(address => mapping(uint256 => bool)) public playerBets;
    mapping(uint256 => uint256) public betToRequest; // betId -> requestId
    mapping(uint256 => uint256) public requestToBet; // requestId -> betId
    mapping(address => bool) public whitelistBettingContracts;

    // Events
    event VRFRequested(uint256 indexed requestId, uint256 indexed betId, address player1, address player2);
    event VRFFulfilled(uint256 indexed requestId, uint256 indexed betId, uint256 randomness);
    event RequestSent(uint256 requestId, uint32 numWords);
    event RequestFulfilled(uint256 requestId, uint256[] randomWords, uint256 payment);
    event Received(address sender, uint256 value);
    event BettingContractRegistered(address indexed bettingContract, address indexed token, uint256 timestamp);

    // Errors
    error OnlyWhitelistedBettingContracts();
    error OnlyFactory();
    error InsufficientETHForVRF();
    error VRFRequestFailed();
    error RequestNotFound();

    constructor(
        address _factory,
        address _wrapperAddress,
        address _linkAddress
    ) VRFV2PlusWrapperConsumerBase(_wrapperAddress) Ownable(msg.sender) {
        factory = _factory;
        wrapperAddress = _wrapperAddress;
        linkAddress = _linkAddress;
    }

    /**
     * @dev Set factory address (only owner)
     */
    function setFactory(address _factory) external onlyOwner {
        factory = _factory;
    }

    modifier onlyFactory() {
        if (msg.sender != factory) revert OnlyFactory();
        _;
    }

    /**
     * @dev Request VRF with ETH payment (called by betting contracts)
     */
    function requestVRF(
        uint256 _betId, 
        address _player1, 
        address _player2
    ) external payable returns (uint256) {
        if (!whitelistBettingContracts[msg.sender]) revert OnlyWhitelistedBettingContracts();
        // Calculate VRF cost
        uint256 vrfCost = getVRFCost();
        if (msg.value < vrfCost) revert InsufficientETHForVRF();

        // Register player bets
        playerBets[_player1][_betId] = true;
        playerBets[_player2][_betId] = true;

        // Request randomness using ETH (enableNativePayment = true)
        bytes memory extraArgs = VRFV2PlusClient._argsToBytes(
            VRFV2PlusClient.ExtraArgsV1({nativePayment: true})
        );

        uint256 requestId;
        uint256 reqPrice;
        
        (requestId, reqPrice) = requestRandomnessPayInNative(
            callbackGasLimit,
            requestConfirmations,
            numWords,
            extraArgs
        );

        // Store request details
        s_requests[requestId] = RequestStatus({
            paid: reqPrice,
            randomWords: new uint256[](0),
            fulfilled: false,
            betId: _betId,
            player1: _player1,
            player2: _player2,
            bettingContract: msg.sender
        });

        requestIds.push(requestId);
        lastRequestId = requestId;
        
        // Update mappings
        betToRequest[_betId] = requestId;
        requestToBet[requestId] = _betId;

        emit VRFRequested(requestId, _betId, _player1, _player2);
        emit RequestSent(requestId, numWords);

        // Refund excess ETH
        if (msg.value > reqPrice) {
            payable(msg.sender).transfer(msg.value - reqPrice);
        }

        return requestId;
    }

    /**
     * @dev Fulfill randomness callback from VRF Coordinator
     */
    function fulfillRandomWords(
        uint256 requestId,
        uint256[] memory randomWords
    ) internal override {
        require(s_requests[requestId].paid > 0, "request not found");
        
        s_requests[requestId].fulfilled = true;
        s_requests[requestId].randomWords = randomWords;
        
        uint256 betId = requestToBet[requestId];
        uint256 randomness = randomWords[0];

        emit VRFFulfilled(requestId, betId, randomness);
        emit RequestFulfilled(requestId, randomWords, s_requests[requestId].paid);

        // Notify the betting contract
        address bettingContract = s_requests[requestId].bettingContract;
        try ICoinFlipBetting(bettingContract).fulfillVRF(betId, randomness) {
            // Success
        } catch {
            // Handle failure gracefully
        }
    }

    /**
     * @dev Register player bet
     */
    function registerPlayerBet(address _player, uint256 _betId) external {
        if (!whitelistBettingContracts[msg.sender]) revert OnlyWhitelistedBettingContracts();
        playerBets[_player][_betId] = true;
    }

    /**
     * @dev Register betting contract (called by factory)
     */
    function registerBettingContract(address _bettingContract, address _token) external {
        if (msg.sender != factory) revert OnlyFactory();
        whitelistBettingContracts[_bettingContract] = true;
        emit BettingContractRegistered(_bettingContract, _token, block.timestamp);
    }

    /**
     * @dev Get VRF cost in ETH
     */
    function getVRFCost() public view returns (uint256) {
        return i_vrfV2PlusWrapper.calculateRequestPriceNative(callbackGasLimit, numWords);
    }

    /**
     * @dev Get request status
     */
    function getRequestStatus(
        uint256 requestId
    ) external view returns (uint256 paid, bool fulfilled, uint256[] memory randomWords) {
        require(s_requests[requestId].paid > 0, "request not found");
        RequestStatus memory request = s_requests[requestId];
        return (request.paid, request.fulfilled, request.randomWords);
    }

    /**
     * @dev Withdraw LINK tokens (only owner)
     */
    function withdrawLink() external onlyOwner {
        LinkTokenInterface link = LinkTokenInterface(linkAddress);
        require(
            link.transfer(msg.sender, link.balanceOf(address(this))),
            "Unable to transfer"
        );
    }

    /**
     * @dev Withdraw ETH (only owner)
     */
    function withdrawNative(uint256 amount) external onlyOwner {
        (bool success, ) = payable(owner()).call{value: amount}("");
        require(success, "withdrawNative failed");
    }

    /**
     * @dev Emergency ETH withdrawal (only owner)
     */
    function emergencyWithdraw() external onlyOwner {
        payable(owner()).transfer(address(this).balance);
    }

    /**
     * @dev Receive ETH
     */
    receive() external payable {
        emit Received(msg.sender, msg.value);
    }

    /**
     * @dev Get contract ETH balance
     */
    function getContractBalance() external view returns (uint256) {
        return address(this).balance;
    }
} "
    },
    "src/ICoinFlipBetting.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface ICoinFlipBetting {
    // Enums
    enum BetResult { PENDING, HEADS, TAILS }
    enum BetStatus { OPEN, MATCHED, COMPLETED, CANCELLED }

    // Structs
    struct Bet {
        uint256 betId;
        address creator;
        address joiner;
        uint256 amount;
        BetResult creatorChoice;
        BetResult result;
        BetStatus status;
        uint256 requestId;
        uint256 createdAt;
        uint256 matchedTime;
        uint256 completedAt;
        address winner;
    }

    // Events for comprehensive tracking
    event BetCreated(
        uint256 indexed betId,
        address indexed creator,
        uint256 amount,
        BetResult creatorChoice,
        uint256 timestamp
    );

    event BetJoined(
        uint256 indexed betId,
        address indexed joiner,
        uint256 timestamp
    );

    event VRFRequested(
        uint256 indexed betId,
        uint256 indexed requestId,
        uint256 timestamp
    );

    event VRFResponseReceived(
        uint256 indexed betId,
        uint256 indexed requestId,
        uint256 randomNumber,
        BetResult result,
        uint256 timestamp
    );

    event BetCompleted(
        uint256 indexed betId,
        address indexed winner,
        address indexed loser,
        uint256 winnerAmount,
        uint256 feeAmount,
        BetResult result,
        uint256 timestamp
    );

    event BetCancelled(
        uint256 indexed betId,
        address indexed creator,
        uint256 refundAmount,
        uint256 timestamp
    );

    event FeeWithdrawn(
        address indexed provider,
        uint256 amount,
        uint256 timestamp
    );

    event EmergencyWithdraw(
        address indexed user,
        uint256 amount,
        uint256 timestamp
    );

    // Events for minimum amount updates
    event MinimumAmountUpdated(
        uint256 oldMinimumAmount,
        uint256 newMinimumAmount,
        uint256 timestamp
    );

    // Functions
    function createBet(uint256 _amount, BetResult _choice) external returns (uint256 betId);
    function joinBet(uint256 _betId) external payable;
    function cancelBet(uint256 _betId) external;
    function withdrawFees() external;
    function emergencyWithdraw(uint256 _betId) external;
    function fulfillVRF(uint256 _betId, uint256 _randomNumber) external;
    
    // View functions
    function getBet(uint256 _betId) external view returns (Bet memory);
    function getBetsByCreator(address _creator) external view returns (uint256[] memory);
    function getBetsByJoiner(address _joiner) external view returns (uint256[] memory);
    function getAcceptedToken() external view returns (address);
    function getBettingProvider() external view returns (address);
    function getFeePercentage() external view returns (uint256);
    function getAccumulatedFees() external view returns (uint256);
    function getTotalBets() external view returns (uint256);
    function getActiveBets() external view returns (uint256);
    function getVRFCost() external view returns (uint256);
    function getMinimumAmount() external view returns (uint256);
    
    // Minimum amount management functions
    function updateMinimumAmount(uint256 _newMinimumAmount) external;
} "
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "evmVersion": "paris",
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    }
  }
}}