PenkMarketL1

{{
  "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;
    }
}
"
    },
    "@openzeppelin/contracts/utils/Pausable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (utils/Pausable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.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 Pausable is Context {
    bool private _paused;

    /**
     * @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);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

    /**
     * @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 {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @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());
    }
}
"
    },
    "@openzeppelin/contracts/utils/ReentrancyGuard.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

/**
 * @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 EIP-1153 (transient storage) is available on the chain you're deploying at,
 * consider using {ReentrancyGuardTransient} instead.
 *
 * 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 ReentrancyGuard {
    // 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;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    constructor() {
        _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
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

        // 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;
    }
}
"
    },
    "contracts/L1.sol": {
      "content": "// SPDX-License-Identifier: MIT\r
pragma solidity ^0.8.19;\r
\r
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";\r
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";\r
import "@openzeppelin/contracts/access/Ownable.sol";\r
import "@openzeppelin/contracts/utils/Pausable.sol";\r
\r
contract PenkMarketL1 is ReentrancyGuard, Ownable, Pausable {\r
    \r
    // Token addresses\r
    address public immutable USDC_ADDRESS;\r
    address public immutable PEPU_ADDRESS;\r
    address public verifierAddress;\r
    \r
    // Transaction states\r
    enum TransactionStatus { PENDING, COMPLETED, REFUNDED }\r
    \r
    // Transaction structure\r
    struct Transaction {\r
        address user;\r
        address tokenAddress;\r
        uint256 amount;\r
        uint256 timestamp;\r
        TransactionStatus status;\r
        string tokenType;\r
    }\r
    \r
    // State variables\r
    uint256 public transactionNonce;\r
    mapping(bytes32 => Transaction) public transactions;\r
    mapping(bytes32 => bool) public txidExists;\r
    mapping(address => bytes32[]) public userTransactions;\r
    \r
    // Token whitelist storage\r
    address[] public allowedTokens;\r
    mapping(address => bool) public isTokenAllowed;\r
    \r
    // PenkBonus system - default 2% (200 basis points)\r
    uint256 public penkBonusBasisPoints = 200;\r
    \r
    // User refund time limit - default 1 hour (3600 seconds)\r
    uint256 public userRefundTimeLimit = 3600;\r
    \r
    // Events\r
    event TransactionCreated(\r
        bytes32 indexed txid,\r
        address indexed user,\r
        address outputToken,\r
        uint256 amount,\r
        uint256 penkBonus,\r
        uint256 totalAmount,\r
        string tokenType,\r
        uint256 timestamp\r
    );\r
    \r
    event TransactionCompleted(\r
        bytes32 indexed txid,\r
        address indexed user,\r
        uint256 amount,\r
        string tokenType\r
    );\r
    \r
    event TransactionRefunded(\r
        bytes32 indexed txid,\r
        address indexed user,\r
        uint256 amount,\r
        string tokenType\r
    );\r
    \r
    event PenkBonusUpdated(uint256 oldBasisPoints, uint256 newBasisPoints);\r
    \r
    event UserRefundTimeLimitUpdated(uint256 oldTimeLimit, uint256 newTimeLimit);\r
    \r
    event VerifierUpdated(address indexed oldVerifier, address indexed newVerifier);\r
    \r
    event TokenAdded(address indexed token);\r
    event TokenRemoved(address indexed token);\r
    \r
    // Modifiers\r
    modifier validTransaction(bytes32 txid) {\r
        require(txidExists[txid], "Transaction does not exist");\r
        require(transactions[txid].status == TransactionStatus.PENDING, "Transaction is not pending");\r
        _;\r
    }\r
    \r
    modifier validOutputToken(address outputToken) {\r
        require(isTokenAllowed[outputToken], "Output token not allowed");\r
        _;\r
    }\r
    \r
    modifier canUserRefund(bytes32 txid) {\r
        require(txidExists[txid], "Transaction does not exist");\r
        require(transactions[txid].status == TransactionStatus.PENDING, "Transaction is not pending");\r
        require(transactions[txid].user == msg.sender, "Only transaction creator can refund");\r
        require(block.timestamp >= transactions[txid].timestamp + userRefundTimeLimit, "Refund time limit not reached");\r
        _;\r
    }\r
    \r
    constructor(\r
        address _usdcAddress,\r
        address _pepuAddress,\r
        address _verifierAddress\r
    ) Ownable(msg.sender) {\r
        require(_usdcAddress != address(0), "Invalid USDC address");\r
        require(_pepuAddress != address(0), "Invalid PEPU address");\r
        require(_verifierAddress != address(0), "Invalid verifier address");\r
        \r
        USDC_ADDRESS = _usdcAddress;\r
        PEPU_ADDRESS = _pepuAddress;\r
        verifierAddress = _verifierAddress;\r
        transactionNonce = 0;\r
    }\r
    \r
    // Buy with ETH\r
    function buy(address outputToken) external payable nonReentrant whenNotPaused validOutputToken(outputToken) {\r
        require(msg.value > 0, "Must send ETH");\r
        \r
        // Generate transaction ID (bytes32 hash)\r
        transactionNonce++;\r
        bytes32 txid = _generateTxid(msg.sender, msg.value, address(0), transactionNonce, block.timestamp);\r
        \r
        // Ensure txid is unique\r
        require(!txidExists[txid], "Transaction ID collision");\r
        \r
        // Store transaction\r
        transactions[txid] = Transaction({\r
            user: msg.sender,\r
            tokenAddress: address(0),\r
            amount: msg.value,\r
            timestamp: block.timestamp,\r
            status: TransactionStatus.PENDING,\r
            tokenType: "ETH"\r
        });\r
        \r
        txidExists[txid] = true;\r
        userTransactions[msg.sender].push(txid);\r
        \r
        uint256 penkBonus = (msg.value * penkBonusBasisPoints) / 10000;\r
        uint256 totalAmount = msg.value + penkBonus;\r
        \r
        emit TransactionCreated(txid, msg.sender, outputToken, msg.value, penkBonus, totalAmount, "ETH", block.timestamp);\r
    }\r
    \r
    // Buy with USDC\r
    function buyWithUSDC(address outputToken, uint256 amount) external nonReentrant whenNotPaused validOutputToken(outputToken) {\r
        require(amount > 0, "Amount must be greater than 0");\r
        \r
        // Transfer USDC from user to contract\r
        IERC20(USDC_ADDRESS).transferFrom(msg.sender, address(this), amount);\r
        \r
        // Generate transaction ID\r
        transactionNonce++;\r
        bytes32 txid = _generateTxid(msg.sender, amount, USDC_ADDRESS, transactionNonce, block.timestamp);\r
        \r
        // Ensure txid is unique\r
        require(!txidExists[txid], "Transaction ID collision");\r
        \r
        // Store transaction\r
        transactions[txid] = Transaction({\r
            user: msg.sender,\r
            tokenAddress: USDC_ADDRESS,\r
            amount: amount,\r
            timestamp: block.timestamp,\r
            status: TransactionStatus.PENDING,\r
            tokenType: "USDC"\r
        });\r
        \r
        txidExists[txid] = true;\r
        userTransactions[msg.sender].push(txid);\r
        \r
        uint256 penkBonus = (amount * penkBonusBasisPoints) / 10000;\r
        uint256 totalAmount = amount + penkBonus;\r
        \r
        emit TransactionCreated(txid, msg.sender, outputToken, amount, penkBonus, totalAmount, "USDC", block.timestamp);\r
    }\r
    \r
    // Buy with PEPU\r
    function buyWithPEPU(address outputToken, uint256 amount) external nonReentrant whenNotPaused validOutputToken(outputToken) {\r
        require(amount > 0, "Amount must be greater than 0");\r
        \r
        // Transfer PEPU from user to contract\r
        IERC20(PEPU_ADDRESS).transferFrom(msg.sender, address(this), amount);\r
        \r
        // Generate transaction ID\r
        transactionNonce++;\r
        bytes32 txid = _generateTxid(msg.sender, amount, PEPU_ADDRESS, transactionNonce, block.timestamp);\r
        \r
        // Ensure txid is unique\r
        require(!txidExists[txid], "Transaction ID collision");\r
        \r
        // Store transaction\r
        transactions[txid] = Transaction({\r
            user: msg.sender,\r
            tokenAddress: PEPU_ADDRESS,\r
            amount: amount,\r
            timestamp: block.timestamp,\r
            status: TransactionStatus.PENDING,\r
            tokenType: "PEPU"\r
        });\r
        \r
        txidExists[txid] = true;\r
        userTransactions[msg.sender].push(txid);\r
        \r
        uint256 penkBonus = (amount * penkBonusBasisPoints) / 10000;\r
        uint256 totalAmount = amount + penkBonus;\r
        \r
        emit TransactionCreated(txid, msg.sender, outputToken, amount, penkBonus, totalAmount, "PEPU", block.timestamp);\r
    }\r
    \r
    // Complete transaction (verifier OR owner can call)\r
    function completeTransaction(bytes32 txid) external validTransaction(txid) {\r
        require(msg.sender == verifierAddress || msg.sender == owner(), "Only verifier or owner can complete transactions");\r
        \r
        Transaction storage transaction = transactions[txid];\r
        transaction.status = TransactionStatus.COMPLETED;\r
        \r
        // Transfer tokens/ETH to owner when completing transaction\r
        if (keccak256(abi.encodePacked(transaction.tokenType)) == keccak256(abi.encodePacked("ETH"))) {\r
            // Transfer ETH to owner\r
            (bool success, ) = payable(owner()).call{value: transaction.amount}("");\r
            require(success, "ETH transfer to owner failed");\r
        } else {\r
            // Transfer ERC20 tokens to owner\r
            IERC20(transaction.tokenAddress).transfer(owner(), transaction.amount);\r
        }\r
        \r
        emit TransactionCompleted(txid, transaction.user, transaction.amount, transaction.tokenType);\r
    }\r
    \r
    // Refund transaction (verifier OR owner can call)\r
    function refundTransaction(bytes32 txid) external validTransaction(txid) {\r
        require(msg.sender == verifierAddress || msg.sender == owner(), "Only verifier or owner can refund transactions");\r
        \r
        Transaction storage transaction = transactions[txid];\r
        transaction.status = TransactionStatus.REFUNDED;\r
        \r
        // Refund the tokens/ETH\r
        if (keccak256(abi.encodePacked(transaction.tokenType)) == keccak256(abi.encodePacked("ETH"))) {\r
            payable(transaction.user).transfer(transaction.amount);\r
        } else {\r
            IERC20(transaction.tokenAddress).transfer(transaction.user, transaction.amount);\r
        }\r
        \r
        emit TransactionRefunded(txid, transaction.user, transaction.amount, transaction.tokenType);\r
    }\r
    \r
    // User self-refund after time limit (users can call this themselves)\r
    function userRefund(bytes32 txid) external canUserRefund(txid) {\r
        Transaction storage transaction = transactions[txid];\r
        transaction.status = TransactionStatus.REFUNDED;\r
        \r
        // Refund the tokens/ETH\r
        if (keccak256(abi.encodePacked(transaction.tokenType)) == keccak256(abi.encodePacked("ETH"))) {\r
            payable(transaction.user).transfer(transaction.amount);\r
        } else {\r
            IERC20(transaction.tokenAddress).transfer(transaction.user, transaction.amount);\r
        }\r
        \r
        emit TransactionRefunded(txid, transaction.user, transaction.amount, transaction.tokenType);\r
    }\r
    \r
    // Set verifier address (only owner)\r
    function setVerifier(address newVerifier) external onlyOwner {\r
        require(newVerifier != address(0), "Invalid verifier address");\r
        address oldVerifier = verifierAddress;\r
        verifierAddress = newVerifier;\r
        emit VerifierUpdated(oldVerifier, newVerifier);\r
    }\r
    \r
    // Token whitelist management functions\r
    \r
    // Add token to whitelist (only owner)\r
    function addToken(address token) external onlyOwner {\r
        require(token != address(0), "Invalid token address");\r
        require(!isTokenAllowed[token], "Token already allowed");\r
        \r
        _addToken(token);\r
    }\r
    \r
    // Remove token from whitelist (only owner)\r
    function removeToken(address token) external onlyOwner {\r
        require(isTokenAllowed[token], "Token not in whitelist");\r
        \r
        isTokenAllowed[token] = false;\r
        \r
        // Remove from array\r
        for (uint256 i = 0; i < allowedTokens.length; i++) {\r
            if (allowedTokens[i] == token) {\r
                allowedTokens[i] = allowedTokens[allowedTokens.length - 1];\r
                allowedTokens.pop();\r
                break;\r
            }\r
        }\r
        \r
        emit TokenRemoved(token);\r
    }\r
    \r
    // Internal function to add token\r
    function _addToken(address token) internal {\r
        isTokenAllowed[token] = true;\r
        allowedTokens.push(token);\r
        emit TokenAdded(token);\r
    }\r
    \r
    // Get all allowed tokens\r
    function getAllowedTokens() external view returns (address[] memory) {\r
        return allowedTokens;\r
    }\r
    \r
    // Get number of allowed tokens\r
    function getAllowedTokensCount() external view returns (uint256) {\r
        return allowedTokens.length;\r
    }\r
    \r
    // Check if token is allowed\r
    function checkTokenAllowed(address token) external view returns (bool) {\r
        return isTokenAllowed[token];\r
    }\r
    \r
    // Get transaction details\r
    function getTransaction(bytes32 txid) external view returns (Transaction memory) {\r
        require(txidExists[txid], "Transaction does not exist");\r
        return transactions[txid];\r
    }\r
    \r
    // Get user's transaction IDs\r
    function getUserTransactions(address user) external view returns (bytes32[] memory) {\r
        return userTransactions[user];\r
    }\r
    \r
    // Pause contract (only owner)\r
    function pause() external onlyOwner {\r
        _pause();\r
    }\r
    \r
    // Unpause contract (only owner)\r
    function unpause() external onlyOwner {\r
        _unpause();\r
    }\r
    \r
    // Set PenkBonus percentage (only owner)\r
    function setPenkBonus(uint256 newBasisPoints) external onlyOwner {\r
        require(newBasisPoints <= 1000, "PenkBonus cannot exceed 10%");\r
        uint256 oldBasisPoints = penkBonusBasisPoints;\r
        penkBonusBasisPoints = newBasisPoints;\r
        emit PenkBonusUpdated(oldBasisPoints, newBasisPoints);\r
    }\r
    \r
    // Set user refund time limit (only owner or verifier)\r
    function setUserRefundTimeLimit(uint256 newTimeLimit) external {\r
        require(msg.sender == owner() || msg.sender == verifierAddress, "Only owner or verifier can set time limit");\r
        require(newTimeLimit > 0, "Time limit must be greater than 0");\r
        require(newTimeLimit <= 86400, "Time limit cannot exceed 24 hours");\r
        uint256 oldTimeLimit = userRefundTimeLimit;\r
        userRefundTimeLimit = newTimeLimit;\r
        emit UserRefundTimeLimitUpdated(oldTimeLimit, newTimeLimit);\r
    }\r
    \r
    // Withdraw ETH (only owner)\r
    function withdrawETH() external onlyOwner {\r
        uint256 balance = address(this).balance;\r
        require(balance > 0, "No ETH to withdraw");\r
        payable(owner()).transfer(balance);\r
    }\r
    \r
    // Withdraw tokens (only owner)\r
    function withdrawToken(address tokenAddress) external onlyOwner {\r
        uint256 balance = IERC20(tokenAddress).balanceOf(address(this));\r
        require(balance > 0, "No tokens to withdraw");\r
        IERC20(tokenAddress).transfer(owner(), balance);\r
    }\r
    \r
    // Generate unique transaction ID using keccak256 hash\r
    function _generateTxid(\r
        address user,\r
        uint256 amount,\r
        address tokenAddress, \r
        uint256 nonce,\r
        uint256 timestamp\r
    ) internal pure returns (bytes32) {\r
        return keccak256(abi.encodePacked(user, amount, tokenAddress, nonce, timestamp));\r
    }\r
    \r
    // Receive function for ETH\r
    receive() external payable {}\r
}"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "evmVersion": "paris",
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    }
  }
}}