Cryo Explorer Ethereum Mainnet

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Create2.sol";
import "./QRPaymentWallet.sol";

/**
 * @title QRPaymentWalletFactory
 * @author Mileston
 * @notice Factory contract for creating QR payment wallets with deterministic addresses
 * @dev Uses CREATE2 to generate predictable wallet addresses for QR codes. Each QR code
 *      gets a unique wallet address that can be computed off-chain before deployment.
 * @custom:security-contact [email protected]
 */
contract QRPaymentWalletFactory is Ownable {
    // Events
    /**
     * @notice Emitted when a new QR payment wallet is created
     * @param wallet Address of the created wallet
     * @param merchant Address of the merchant
     * @param qrCodeId Unique identifier for the QR code
     * @param salt Salt used for CREATE2 deployment
     */
    event QRWalletCreated(
        address indexed wallet,
        address indexed merchant,
        string qrCodeId,
        bytes32 indexed salt
    );

    /**
     * @notice Emitted when the EfficientPay contract is updated
     * @param oldEfficientPay Previous EfficientPay address
     * @param newEfficientPay New EfficientPay address
     */
    event EfficientPayUpdated(
        address indexed oldEfficientPay,
        address indexed newEfficientPay
    );

    // State variables
    address payable public efficientPay;
    mapping(address => bool) public isQRWallet;
    mapping(string => address) public qrCodeToWallet;
    mapping(address => string) public walletToQRCode;
    address[] public allWallets;

    /**
     * @notice Constructor for the factory
     * @param _efficientPay Address of the EfficientPay contract
     */
    constructor(address payable _efficientPay) Ownable(msg.sender) {
        require(_efficientPay != address(0), "Invalid EfficientPay address");
        efficientPay = _efficientPay;
    }

    /**
     * @notice Creates a new QR payment wallet
     * @dev Uses CREATE2 to generate a deterministic address based on the QR code ID
     * @param merchant Address of the merchant to receive payments
     * @param qrCodeId Unique identifier for the QR code
     * @param walletOwner Address of the wallet owner (can be the merchant or a separate admin)
     * @return wallet Address of the created wallet
     */
    function createQRWallet(
        address merchant,
        string memory qrCodeId,
        address walletOwner
    ) external returns (address wallet) {
        require(merchant != address(0), "Invalid merchant address");
        require(walletOwner != address(0), "Invalid wallet owner address");
        require(bytes(qrCodeId).length > 0, "Invalid QR code ID");
        require(
            qrCodeToWallet[qrCodeId] == address(0),
            "QR code already exists"
        );

        // Generate salt from QR code ID, merchant, and wallet owner
        bytes32 salt = keccak256(
            abi.encodePacked(qrCodeId, merchant, walletOwner)
        );

        // Create the wallet using CREATE2
        wallet = address(
            new QRPaymentWallet{salt: salt}(walletOwner, efficientPay, merchant)
        );

        // Register the wallet
        isQRWallet[wallet] = true;
        qrCodeToWallet[qrCodeId] = wallet;
        walletToQRCode[wallet] = qrCodeId;
        allWallets.push(wallet);

        emit QRWalletCreated(wallet, merchant, qrCodeId, salt);
    }

    /**
     * @notice Computes the address of a QR wallet before deployment
     * @dev Can be used to generate QR codes with wallet addresses before deployment
     * @param merchant Address of the merchant
     * @param qrCodeId Unique identifier for the QR code
     * @param owner Address of the wallet owner
     * @return wallet Address that the wallet will have when deployed
     */
    function computeQRWalletAddress(
        address merchant,
        string memory qrCodeId,
        address owner
    ) external view returns (address wallet) {
        require(merchant != address(0), "Invalid merchant address");
        require(owner != address(0), "Invalid owner address");
        require(bytes(qrCodeId).length > 0, "Invalid QR code ID");

        bytes32 salt = keccak256(abi.encodePacked(qrCodeId, merchant, owner));

        bytes32 hash = keccak256(
            abi.encodePacked(
                bytes1(0xff),
                address(this),
                salt,
                keccak256(
                    abi.encodePacked(
                        type(QRPaymentWallet).creationCode,
                        abi.encode(owner, efficientPay, merchant)
                    )
                )
            )
        );

        wallet = address(uint160(uint256(hash)));
    }

    /**
     * @notice Updates the EfficientPay contract address
     * @dev Only callable by owner. Affects all future wallet deployments.
     * @param _efficientPay New EfficientPay address
     */
    function setEfficientPay(address payable _efficientPay) external onlyOwner {
        require(_efficientPay != address(0), "Invalid EfficientPay address");
        address oldEfficientPay = address(efficientPay);
        efficientPay = _efficientPay;
        emit EfficientPayUpdated(oldEfficientPay, _efficientPay);
    }

    /**
     * @notice Gets all created wallets
     * @return Array of all wallet addresses
     */
    function getAllWallets() external view returns (address[] memory) {
        return allWallets;
    }

    /**
     * @notice Gets the QR code ID for a wallet
     * @param wallet Address of the wallet
     * @return QR code ID associated with the wallet
     */
    function getQRCodeForWallet(
        address wallet
    ) external view returns (string memory) {
        return walletToQRCode[wallet];
    }

    /**
     * @notice Gets the wallet address for a QR code ID
     * @param qrCodeId QR code ID
     * @return Wallet address associated with the QR code
     */
    function getWalletForQRCode(
        string memory qrCodeId
    ) external view returns (address) {
        return qrCodeToWallet[qrCodeId];
    }

    /**
     * @notice Checks if an address is a QR payment wallet
     * @param wallet Address to check
     * @return True if the address is a QR payment wallet
     */
    function isQRPaymentWallet(address wallet) external view returns (bool) {
        return isQRWallet[wallet];
    }

    /**
     * @notice Gets factory statistics
     * @return _totalWallets Total number of wallets created
     * @return _efficientPay Current EfficientPay address
     */
    function getFactoryStats()
        external
        view
        returns (uint256 _totalWallets, address _efficientPay)
    {
        return (allWallets.length, address(efficientPay));
    }
}

// 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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/Create2.sol)

pragma solidity ^0.8.20;

import {Errors} from "./Errors.sol";

/**
 * @dev Helper to make usage of the `CREATE2` EVM opcode easier and safer.
 * `CREATE2` can be used to compute in advance the address where a smart
 * contract will be deployed, which allows for interesting new mechanisms known
 * as 'counterfactual interactions'.
 *
 * See the https://eips.ethereum.org/EIPS/eip-1014#motivation[EIP] for more
 * information.
 */
library Create2 {
    /**
     * @dev There's no code to deploy.
     */
    error Create2EmptyBytecode();

    /**
     * @dev Deploys a contract using `CREATE2`. The address where the contract
     * will be deployed can be known in advance via {computeAddress}.
     *
     * The bytecode for a contract can be obtained from Solidity with
     * `type(contractName).creationCode`.
     *
     * Requirements:
     *
     * - `bytecode` must not be empty.
     * - `salt` must have not been used for `bytecode` already.
     * - the factory must have a balance of at least `amount`.
     * - if `amount` is non-zero, `bytecode` must have a `payable` constructor.
     */
    function deploy(uint256 amount, bytes32 salt, bytes memory bytecode) internal returns (address addr) {
        if (address(this).balance < amount) {
            revert Errors.InsufficientBalance(address(this).balance, amount);
        }
        if (bytecode.length == 0) {
            revert Create2EmptyBytecode();
        }
        assembly ("memory-safe") {
            addr := create2(amount, add(bytecode, 0x20), mload(bytecode), salt)
            // if no address was created, and returndata is not empty, bubble revert
            if and(iszero(addr), not(iszero(returndatasize()))) {
                let p := mload(0x40)
                returndatacopy(p, 0, returndatasize())
                revert(p, returndatasize())
            }
        }
        if (addr == address(0)) {
            revert Errors.FailedDeployment();
        }
    }

    /**
     * @dev Returns the address where a contract will be stored if deployed via {deploy}. Any change in the
     * `bytecodeHash` or `salt` will result in a new destination address.
     */
    function computeAddress(bytes32 salt, bytes32 bytecodeHash) internal view returns (address) {
        return computeAddress(salt, bytecodeHash, address(this));
    }

    /**
     * @dev Returns the address where a contract will be stored if deployed via {deploy} from a contract located at
     * `deployer`. If `deployer` is this contract's address, returns the same value as {computeAddress}.
     */
    function computeAddress(bytes32 salt, bytes32 bytecodeHash, address deployer) internal pure returns (address addr) {
        assembly ("memory-safe") {
            let ptr := mload(0x40) // Get free memory pointer

            // |                   | ↓ ptr ...  ↓ ptr + 0x0B (start) ...  ↓ ptr + 0x20 ...  ↓ ptr + 0x40 ...   |
            // |-------------------|---------------------------------------------------------------------------|
            // | bytecodeHash      |                                                        CCCCCCCCCCCCC...CC |
            // | salt              |                                      BBBBBBBBBBBBB...BB                   |
            // | deployer          | 000000...0000AAAAAAAAAAAAAAAAAAA...AA                                     |
            // | 0xFF              |            FF                                                             |
            // |-------------------|---------------------------------------------------------------------------|
            // | memory            | 000000...00FFAAAAAAAAAAAAAAAAAAA...AABBBBBBBBBBBBB...BBCCCCCCCCCCCCC...CC |
            // | keccak(start, 85) |            ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑ |

            mstore(add(ptr, 0x40), bytecodeHash)
            mstore(add(ptr, 0x20), salt)
            mstore(ptr, deployer) // Right-aligned with 12 preceding garbage bytes
            let start := add(ptr, 0x0b) // The hashed data starts at the final garbage byte which we will set to 0xff
            mstore8(start, 0xff)
            addr := and(keccak256(start, 85), 0xffffffffffffffffffffffffffffffffffffffff)
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import {AggregatorV3Interface} from "@chainlink/contracts/src/v0.8/shared/interfaces/AggregatorV3Interface.sol";
import "./EfficientPay.sol";

/**
 * @title QRPaymentWallet
 * @author Mileston
 * @notice Smart contract wallet for QR code payments that automatically processes received funds
 * @dev Each QR code generates a unique wallet address that can receive payments and automatically
 *      process them through the EfficientPay contract. Supports native tokens and ERC20 tokens.
 * @custom:security-contact [email protected]
 */
contract QRPaymentWallet is Ownable, ReentrancyGuard {
    using SafeERC20 for IERC20;
    using Address for address payable;

    // Events
    /**
     * @notice Emitted when a payment is received and processed
     * @param payer Address of the user who sent the payment
     * @param token Address of the token used (0x0 for native token)
     * @param amount Amount received
     * @param merchant Address of the merchant who received the processed payment
     * @param processedAmount Amount processed through EfficientPay
     */
    event PaymentReceived(
        address indexed payer,
        address indexed token,
        uint256 amount,
        address indexed merchant,
        uint256 processedAmount
    );

    /**
     * @notice Emitted when the EfficientPay contract is updated
     * @param oldEfficientPay Previous EfficientPay address
     * @param newEfficientPay New EfficientPay address
     */
    event EfficientPayUpdated(
        address indexed oldEfficientPay,
        address indexed newEfficientPay
    );

    /**
     * @notice Emitted when the merchant address is updated
     * @param oldMerchant Previous merchant address
     * @param newMerchant New merchant address
     */
    event MerchantUpdated(
        address indexed oldMerchant,
        address indexed newMerchant
    );

    // State variables
    address payable public efficientPay;
    address public merchant;
    bool public isActive;
    uint256 public totalProcessed;

    /**
     * @notice Constructor for QR payment wallet
     * @param owner_ Address of the wallet owner (can be the merchant or a separate admin)
     * @param _efficientPay Address of the EfficientPay contract
     * @param merchant_ Address of the merchant to receive payments
     */
    constructor(
        address owner_,
        address payable _efficientPay,
        address merchant_
    ) Ownable(owner_) {
        require(merchant_ != address(0), "Invalid merchant address");
        require(_efficientPay != address(0), "Invalid EfficientPay address");
        efficientPay = _efficientPay;
        merchant = merchant_;
        isActive = true;
    }

    /**
     * @notice Receives native token payments (ETH, POL, AVAX) and processes them
     * @dev Automatically processes the payment through EfficientPay contract with slippage protection
     */
    receive() external payable {
        require(isActive, "Wallet not active");
        require(msg.value > 0, "No value");
        EfficientPay(payable(efficientPay)).pay{value: msg.value}(
            merchant,
            address(0),
            msg.value,
            900_000 // 0.9 USD (6 decimals)
        );
        totalProcessed += msg.value;
        emit PaymentReceived(
            msg.sender,
            address(0),
            msg.value,
            merchant,
            msg.value
        );
    }

    /**
     * @notice Processes ERC20 token payments
     * @dev Called by users who want to pay with ERC20 tokens
     * @param token Address of the ERC20 token
     * @param amount Amount of tokens to pay
     */
    function payWithToken(address token, uint256 amount) external nonReentrant {
        require(isActive, "Wallet not active");
        require(token != address(0), "Use receive() for native");
        IERC20(token).safeTransferFrom(msg.sender, address(this), amount);
        SafeERC20.forceApprove(IERC20(token), efficientPay, amount);
        EfficientPay(payable(efficientPay)).pay(
            merchant,
            token,
            amount,
            900_000 // 0.9 USD (6 decimals)
        );
        totalProcessed += amount;
        emit PaymentReceived(msg.sender, token, amount, merchant, amount);
    }

    /**
     * @notice Processes all available ERC20 tokens in the wallet
     * @dev This function processes all tokens that have a balance > 0
     * @param tokens Array of token addresses to process
     */
    function processAllTokens(address[] calldata tokens) external nonReentrant {
        require(isActive, "Wallet not active");
        require(tokens.length > 0, "No tokens provided");
        for (uint256 i = 0; i < tokens.length; i++) {
            address token = tokens[i];
            require(token != address(0), "Invalid token address");
            uint256 balance = IERC20(token).balanceOf(address(this));
            if (balance > 0) {
                SafeERC20.forceApprove(IERC20(token), efficientPay, balance);
                EfficientPay(payable(efficientPay)).pay(
                    merchant,
                    token,
                    balance,
                    900_000 // 0.9 USD (6 decimals)
                );
                totalProcessed += balance;
                emit PaymentReceived(
                    msg.sender,
                    token,
                    balance,
                    merchant,
                    balance
                );
            }
        }
    }

    /**
     * @notice Processes any ERC20 token payment (including USDC, USDT, DAI, etc.)
     * @dev This function can be called by anyone to process ERC20 tokens that were sent directly to the wallet
     * @param token Address of the ERC20 token to process
     * @param amount Amount of tokens to process
     */
    function processERC20Token(
        address token,
        uint256 amount
    ) external nonReentrant {
        require(isActive, "Wallet not active");
        require(token != address(0), "Use receive() for native tokens");
        require(amount > 0, "Amount must be > 0");
        uint256 balance = IERC20(token).balanceOf(address(this));
        require(balance >= amount, "Insufficient token balance");
        SafeERC20.forceApprove(IERC20(token), efficientPay, amount);
        EfficientPay(payable(efficientPay)).pay(
            merchant,
            token,
            amount,
            900_000 // 0.9 USD (6 decimals)
        );
        totalProcessed += amount;
        emit PaymentReceived(msg.sender, token, amount, merchant, amount);
    }

    /**
     * @notice Processes all available tokens of a specific ERC20 token
     * @dev Convenience function to process all balance of a specific token
     * @param token Address of the ERC20 token to process
     */
    function processAllERC20Token(address token) external nonReentrant {
        require(isActive, "Wallet not active");
        require(token != address(0), "Use receive() for native tokens");
        uint256 balance = IERC20(token).balanceOf(address(this));
        require(balance > 0, "No tokens to process");
        SafeERC20.forceApprove(IERC20(token), efficientPay, balance);
        EfficientPay(payable(efficientPay)).pay(
            merchant,
            token,
            balance,
            900_000 // 0.9 USD (6 decimals)
        );
        totalProcessed += balance;
        emit PaymentReceived(msg.sender, token, balance, merchant, balance);
    }

    /**
     * @notice Processes all available USDC in the wallet (convenience function)
     * @dev This is a convenience wrapper for processAllERC20Token(usdcAddress)
     * @param usdcAddress Address of the USDC token
     */
    function processAllUSDC(address usdcAddress) external nonReentrant {
        require(isActive, "Wallet not active");
        require(usdcAddress != address(0), "Invalid USDC address");
        uint256 balance = IERC20(usdcAddress).balanceOf(address(this));
        require(balance > 0, "No USDC to process");
        SafeERC20.forceApprove(IERC20(usdcAddress), efficientPay, balance);
        EfficientPay(payable(efficientPay)).pay(
            merchant,
            usdcAddress,
            balance,
            900_000 // 0.9 USD (6 decimals)
        );
        totalProcessed += balance;
        emit PaymentReceived(
            msg.sender,
            usdcAddress,
            balance,
            merchant,
            balance
        );
    }

    /**
     * @notice Updates the EfficientPay contract address
     * @dev Only callable by owner
     * @param _efficientPay New EfficientPay address
     */
    function setEfficientPay(address payable _efficientPay) external onlyOwner {
        require(_efficientPay != address(0), "Invalid EfficientPay address");
        address oldEfficientPay = efficientPay;
        efficientPay = _efficientPay;
        emit EfficientPayUpdated(oldEfficientPay, _efficientPay);
    }

    /**
     * @notice Updates the merchant address
     * @dev Only callable by owner
     * @param _merchant New merchant address
     */
    function setMerchant(address _merchant) external onlyOwner {
        require(_merchant != address(0), "Invalid merchant address");
        address oldMerchant = merchant;
        merchant = _merchant;
        emit MerchantUpdated(oldMerchant, _merchant);
    }

    /**
     * @notice Activates or deactivates the wallet
     * @dev Only callable by owner
     * @param _isActive New active status
     */
    function setActive(bool _isActive) external onlyOwner {
        isActive = _isActive;
    }

    /**
     * @notice Gets the wallet's ETH balance
     * @return Current ETH balance
     */
    function getETHBalance() external view returns (uint256) {
        return address(this).balance;
    }

    /**
     * @notice Gets the wallet's token balance
     * @param token Address of the token
     * @return Current token balance
     */
    function getTokenBalance(address token) external view returns (uint256) {
        return IERC20(token).balanceOf(address(this));
    }

    /**
     * @notice Gets wallet statistics
     * @return _totalProcessed Total amount processed
     * @return _isActive Current active status
     * @return _merchant Current merchant address
     * @return _efficientPay Current EfficientPay address
     */
    function getWalletStats()
        external
        view
        returns (
            uint256 _totalProcessed,
            bool _isActive,
            address _merchant,
            address _efficientPay
        )
    {
        return (totalProcessed, isActive, merchant, efficientPay);
    }
}

// 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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/Errors.sol)

pragma solidity ^0.8.20;

/**
 * @dev Collection of common custom errors used in multiple contracts
 *
 * IMPORTANT: Backwards compatibility is not guaranteed in future versions of the library.
 * It is recommended to avoid relying on the error API for critical functionality.
 *
 * _Available since v5.1._
 */
library Errors {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error InsufficientBalance(uint256 balance, uint256 needed);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedCall();

    /**
     * @dev The deployment failed.
     */
    error FailedDeployment();

    /**
     * @dev A necessary precompile is missing.
     */
    error MissingPrecompile(address);
}

// 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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC1363} from "../../../interfaces/IERC1363.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC-20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    /**
     * @dev An operation with an ERC-20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Variant of {safeTransfer} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransfer(IERC20 token, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Variant of {safeTransferFrom} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransferFrom(IERC20 token, address from, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     *
     * NOTE: If the token implements ERC-7674, this function will not modify any temporary allowance. This function
     * only sets the "standard" allowance. Any temporary allowance will remain active, in addition to the value being
     * set here.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            safeTransfer(token, to, value);
        } else if (!token.transferAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
     * has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferFromAndCallRelaxed(
        IERC1363 token,
        address from,
        address to,
        uint256 value,
        bytes memory data
    ) internal {
        if (to.code.length == 0) {
            safeTransferFrom(token, from, to, value);
        } else if (!token.transferFromAndCall(from, to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
     * Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
     * once without retrying, and relies on the returned value to be true.
     *
     * Reverts if the returned value is other than `true`.
     */
    function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            forceApprove(token, to, value);
        } else if (!token.approveAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturnBool} that reverts if call fails to meet the requirements.
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            let success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            // bubble errors
            if iszero(success) {
                let ptr := mload(0x40)
                returndatacopy(ptr, 0, returndatasize())
                revert(ptr, returndatasize())
            }
            returnSize := returndatasize()
            returnValue := mload(0)
        }

        if (returnSize == 0 ? address(token).code.length == 0 : returnValue != 1) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silently catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        bool success;
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            returnSize := returndatasize()
            returnValue := mload(0)
        }
        return success && (returnSize == 0 ? address(token).code.length > 0 : returnValue == 1);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.2.0) (utils/Address.sol)

pragma solidity ^0.8.20;

import {Errors} from "./Errors.sol";

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @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/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) {
            revert Errors.InsufficientBalance(address(this).balance, amount);
        }

        (bool success, bytes memory returndata) = recipient.call{value: amount}("");
        if (!success) {
            _revert(returndata);
        }
    }

    /**
     * @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 or custom error, it is bubbled
     * up by this function (like regular Solidity function calls). However, if
     * the call reverted with no returned reason, this function reverts with a
     * {Errors.FailedCall} error.
     *
     * 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.
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    /**
     * @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`.
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) {
            revert Errors.InsufficientBalance(address(this).balance, value);
        }
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

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

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

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
     * was not a contract or bubbling up the revert reason (falling back to {Errors.FailedCall}) in case
     * of an unsuccessful call.
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata
    ) internal view returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            // only check if target is a contract if the call was successful and the return data is empty
            // otherwise we already know that it was a contract
            if (returndata.length == 0 && target.code.length == 0) {
                revert AddressEmptyCode(target);
            }
            return returndata;
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
     * revert reason or with a default {Errors.FailedCall} error.
     */
    function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            return returndata;
        }
    }

    /**
     * @dev Reverts with returndata if present. Otherwise reverts with {Errors.FailedCall}.
     */
    function _revert(bytes memory returndata) 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
            assembly ("memory-safe") {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert Errors.FailedCall();
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// solhint-disable-next-line interface-starts-with-i
interface AggregatorV3Interface {
  function decimals() external view returns (uint8);

  function description() external view returns (string memory);

  function version() external view returns (uint256);

  function getRoundData(
    uint80 _roundId
  ) external view returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);

  function latestRoundData()
    external
    view
    returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import "@uniswap/swap-router-contracts/interfaces/IV3SwapRouter.sol";
import "@uniswap/v3-periphery/contracts/libraries/TransferHelper.sol";
import "../interfaces/IWETH9.sol";

/**
 * @title EfficientPay
 * @author Mileston
 * @notice Upgradeable smart contract for processing payments in various tokens with automatic conversion to USDC
 * @dev This contract supports native token payments (ETH, POL, AVAX) and ERC20 tokens, automatically swapping them to USDC
 *      using Uniswap V3. It includes safety mechanisms to return funds if swaps fail and maintains payment history.
 * @custom:security-contact [email protected]
 * @custom:security This contract has been audited and includes reentrancy protection
 */
contract EfficientPay is
    Initializable,
    OwnableUpgradeable,
    ReentrancyGuardUpgradeable,
    UUPSUpgradeable
{
    using SafeERC20 for IERC20;
    using Address for address payable;

    /**
     * @notice Structure to store payment transaction details
     * @param payer Address of the user making the payment
     * @param merchant Address of the merchant receiving the payment
     * @param tokenIn Address of the token used for payment (0x0 for native token)
     * @param amountIn Amount of input token sent
     * @param amountUSDC Amount of USDC received after conversion
     * @param fee Fee amount taken by the protocol
     * @param timestamp Block timestamp when payment was processed
     * @param txHash Unique hash identifying this payment transaction
     */
    struct PaymentRecord {
        address payer;
        address merchant;
        address tokenIn;
        uint256 amountIn;
        uint256 amountUSDC;
        uint256 fee;
        uint256 timestamp;
        bytes32 txHash;
    }

    // Storage variables
    mapping(address => PaymentRecord[]) public paymentHistory;
    mapping(address => PaymentRecord[]) public merchantHistory;
    mapping(address => bool) public isSupportedToken;
    mapping(address => string) public tokenSymbol;
    mapping(bytes32 => bool) public paymentSuccess;

    address public USDC;
    address public nativeToken;
    IV3SwapRouter public swapRouter;
    address public feeReceiver;

    // Constants
    uint256 public constant FEE_BPS = 40; // 0.4% fee (40 basis points)
    uint256 public constant BPS_DENOM = 10000; // 100% in basis points
    uint24 public constant UNISWAP_POOL_FEE = 500; // 0.05% pool fee

    // Events
    /**
     * @notice Emitted when a payment is successfully processed
     * @param payer Address of the user making the payment
     * @param merchant Address of the merchant receiving the payment
     * @param tokenIn Address of the input token
     * @param amountIn Amount of input token sent
     * @param amountUSDC Amount of USDC received
     * @param fee Fee amount taken
     * @param txHash Unique transaction hash
     */
    event PaymentProcessed(
        address indexed payer,
        address indexed merchant,
        address indexed tokenIn,
        uint256 amountIn,
        uint256 amountUSDC,
        uint256 fee,
        bytes32 txHash
    );

    /**
     * @notice Emitted when a token swap is completed
     * @param payer Address of the user
     * @param tokenIn Address of the input token
     * @param amountIn Amount of input token
     * @param amountOutUSDC Amount of USDC received
     */
    event TokenSwapped(
        address indexed payer,
        address tokenIn,
        uint256 amountIn,
        uint256 amountOutUSDC
    );

    /**
     * @notice Emitted when a supported token is added
     * @param token Address of the token
     * @param symbol Symbol of the token
     */
    event SupportedTokenAdded(address token, string symbol);

    /**
     * @notice Emitted when a supported token is removed
     * @param token Address of the token
     */
    event SupportedTokenRemoved(address token);

    /**
     * @notice Emitted when a swap fails for debugging purposes
     * @param payer Address of the user
     * @param tokenIn Address of the input token
     * @param amountIn Amount of input token
     * @param reason Reason for the swap failure
     */
    event DebugSwapError(
        address indexed payer,
        address tokenIn,
        uint256 amountIn,
        string reason
    );

    /**
     * @notice Emitted when the fee receiver is updated
     * @param oldFeeReceiver Previous fee receiver address
     * @param newFeeReceiver New fee receiver address
     */
    event FeeReceiverUpdated(
        address indexed oldFeeReceiver,
        address indexed newFeeReceiver
    );

    /**
     * @notice Emitted when a batch payment is made
     * @param sender Address of the sender
     * @param recipients Array of recipient addresses
     * @param amounts Array of USDC amounts sent to each recipient
     * @param total Total USDC amount sent
     * @param fee Total fee taken
     */
    event BatchPayment(
        address indexed sender,
        address[] recipients,
        uint256[] amounts,
        uint256 total,
        uint256 fee
    );

    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor() {
        _disableInitializers();
    }

    /**
     * @notice Initializes the contract with supported tokens and configuration
     * @dev This function can only be called once during deployment
     * @param supportedTokens Array of token addresses to support
     * @param symbols Array of token symbols corresponding to supportedTokens
     * @param _usdc Address of the USDC token
     * @param _nativeToken Address of the wrapped native token (WETH, WMATIC, etc.)
     * @param _swapRouter Address of the Uniswap V3 SwapRouter
     * @param feeReceiver_ Address of the fee receiver
     */
    function initialize(
        address[] memory supportedTokens,
        string[] memory symbols,
        address _usdc,
        address _nativeToken,
        address _swapRouter,
        address feeReceiver_
    ) public initializer {
        require(supportedTokens.length == symbols.length, "Mismatched input");
        require(_usdc != address(0), "Invalid USDC address");
        require(_nativeToken != address(0), "Invalid native token address");
        require(_swapRouter != address(0), "Invalid swap router address");
        require(feeReceiver_ != address(0), "Invalid fee receiver");
        __Ownable_init(msg.sender);
        __ReentrancyGuard_init();
        __UUPSUpgradeable_init();

        USDC = _usdc;
        nativeToken = _nativeToken;
        swapRouter = IV3SwapRouter(_swapRouter);
        feeReceiver = feeReceiver_;
        for (uint256 i = 0; i < supportedTokens.length; i++) {
            // Allow address(0) for native token
            isSupportedToken[supportedTokens[i]] = true;
            tokenSymbol[supportedTokens[i]] = symbols[i];
            emit SupportedTokenAdded(supportedTokens[i], symbols[i]);
        }
    }

    /**
     * @notice Processes a payment by converting input token to USDC and transferring to merchant
     * @dev Supports native tokens (ETH, POL, AVAX) and ERC20 tokens. Native tokens are wrapped before swapping.
     *      If swap fails, funds are returned to the user. Fee is calculated as 0.4% of USDC amount.
     * @param merchant Address of the merchant to receive the payment
     * @param tokenIn Address of the token to pay with (0x0 for native token)
     * @param amountIn Amount of input token to pay
     * @param minAmountOut Minimum amount of USDC to receive (slippage protection)
     * @return txHash Unique identifier for this payment transaction
     */
    function pay(
        address merchant,
        address tokenIn,
        uint256 amountIn,
        uint256 minAmountOut // optional, can be 0
    ) external payable nonReentrant returns (bytes32) {
        require(merchant != address(0), "Invalid merchant");
        require(isSupportedToken[tokenIn], "Token not supported");
        require(amountIn > 0, "Amount must be > 0");

        uint256 usdcAmount;
        uint256 feeAmount;

        if (tokenIn == USDC) {
            // Direct USDC payment - no swap needed
            IERC20(USDC).safeTransferFrom(msg.sender, address(this), amountIn);
            usdcAmount = amountIn;
        } else if (tokenIn == address(0)) {
            // Native token payment (ETH, POL, AVAX)
            require(msg.value == amountIn, "Native token value mismatch");
            usdcAmount = _swapWithUniswapV3Native(amountIn, minAmountOut);
        } else {
            // ERC20 token payment
            IERC20(tokenIn).safeTransferFrom(
                msg.sender,
                address(this),
                amountIn
            );
            usdcAmount = _swapWithUniswapV3ERC20(
                tokenIn,
                amountIn,
                minAmountOut
            );
        }

        // Calculate fee (0.4% of USDC amount)
        feeAmount = (usdcAmount * FEE_BPS) / BPS_DENOM;
        uint256 merchantAmount = usdcAmount - feeAmount;

        // Transfer USDC to merchant and fee to fee receiver
        IERC20(USDC).safeTransfer(merchant, merchantAmount);
        IERC20(USDC).safeTransfer(feeReceiver, feeAmount);

        // Create payment record
        PaymentRecord memory rec = PaymentRecord({
            payer: msg.sender,
            merchant: merchant,
            tokenIn: tokenIn,
            amountIn: amountIn,
            amountUSDC: usdcAmount,
            fee: feeAmount,
            timestamp: block.timestamp,
            txHash: keccak256(
                abi.encodePacked(
                    msg.sender,
                    merchant,
                    tokenIn,
                    amountIn,
                    block.timestamp
                )
            )
        });

        // Store payment records
        paymentHistory[msg.sender].push(rec);
        merchantHistory[merchant].push(rec);
        paymentSuccess[rec.txHash] = true;

        emit PaymentProcessed(
            msg.sender,
            merchant,
            tokenIn,
            amountIn,
            usdcAmount,
            feeAmount,
            rec.txHash
        );
        return rec.txHash;
    }

    /**
     * @notice Swaps an ERC20 token to USDC and sends USDC to the user
     * @param tokenIn Address of the input token
     * @param amountIn Amount of input token to swap
     * @param minAmountOut Minimum amount of USDC to receive
     */
    function swapToUSDC(
        address tokenIn,
        uint256 amountIn,
        uint256 minAmountOut
    ) external nonReentrant {
        require(isSupportedToken[tokenIn], "Token not supported");
        require(tokenIn != address(0), "Use swapNativeToUSDC for native");
        require(amountIn > 0, "Amount must be > 0");
        IERC20(tokenIn).safeTransferFrom(msg.sender, address(this), amountIn);
        uint256 usdcAmount = _swapWithUniswapV3ERC20(
            tokenIn,
            amountIn,
            minAmountOut
        );
        uint256 fee = (usdcAmount * FEE_BPS) / BPS_DENOM;
        uint256 userAmount = usdcAmount - fee;
        IERC20(USDC).safeTransfer(msg.sender, userAmount);
        IERC20(USDC).safeTransfer(feeReceiver, fee);
    }

    /**
     * @notice Swaps native token to USDC and sends USDC to the user
     * @param minAmountOut Minimum amount of USDC to receive
     */
    function swapNativeToUSDC(
        uint256 minAmountOut
    ) external payable nonReentrant {
        require(isSupportedToken[address(0)], "Native token not supported");
        require(msg.value > 0, "Amount must be > 0");
        uint256 usdcAmount = _swapWithUniswapV3Native(msg.value, minAmountOut);
        uint256 fee = (usdcAmount * FEE_BPS) / BPS_DENOM;
        uint256 userAmount = usdcAmount - fee;
        IERC20(USDC).safeTransfer(msg.sender, userAmount);
        IERC20(USDC).safeTransfer(feeReceiver, fee);
    }

    /**
     * @notice Batch sends USDC to multiple recipients with a 0.4% fee
     * @param recipients Array of recipient addresses
     * @param amounts Array of USDC amounts to send to each recipient
     */
    function batchPayUSDC(
        address[] calldata recipients,
        uint256[] calldata amounts
    ) external nonReentrant {
        require(recipients.length == amounts.length, "Mismatched input");
        require(
            recipients.length > 0 && recipients.length <= 100,
            "Invalid recipient count"
        );
        uint256 total = 0;
        for (uint256 i = 0; i < amounts.length; i++) {
            require(recipients[i] != address(0), "Invalid recipient");
            require(amounts[i] > 0, "Zero amount");
            total += amounts[i];
        }
        uint256 fee = (total * FEE_BPS) / BPS_DENOM;
        uint256 totalWithFee = total + fee;
        IERC20(USDC).safeTransferFrom(msg.sender, address(this), totalWithFee);
        for (uint256 i = 0; i < recipients.length; i++) {
            IERC20(USDC).safeTransfer(recipients[i], amounts[i]);
        }
        IERC20(USDC).safeTransfer(feeReceiver, fee);
        emit BatchPayment(msg.sender, recipients, amounts, total, fee);
    }

    /**
     * @notice Swaps native token (ETH, POL, AVAX) to USDC using Uniswap V3
     * @dev Wraps native token to WETH/WMATIC/etc. before swapping. If swap fails,
     *      unwraps and returns native token to user.
     * @param amountIn Amount of native token to swap
     * @param minAmountOut Minimum amount of USDC to receive
     * @return amountOut Amount of USDC received
     */
    function _swapWithUniswapV3Native(
        uint256 amountIn,
        uint256 minAmountOut
    ) internal returns (uint256 amountOut) {
        // Wrap native token to WETH/WMATIC/etc.
        IWETH9(nativeToken).deposit{value: amountIn}();

        // Approve wrapped token for swap router
        IERC20(nativeToken).approve(address(swapRouter), amountIn);

        // Perform the swap
        IV3SwapRouter.ExactInputSingleParams memory params = IV3SwapRouter
            .ExactInputSingleParams({
                tokenIn: nativeToken,
                tokenOut: USDC,
                fee: UNISWAP_POOL_FEE,
                recipient: address(this),
                amountIn: amountIn,
                amountOutMinimum: minAmountOut,
                sqrtPriceLimitX96: 0
            });

        try swapRouter.exactInputSingle(params) returns (uint256 amountOut_) {
            amountOut = amountOut_;
            emit TokenSwapped(msg.sender, address(0), amountIn, amountOut);
        } catch (bytes memory reason) {
            // If swap fails, unwrap and return native token to user
            IWETH9(nativeToken).withdraw(amountIn);
            payable(msg.sender).transfer(amountIn);

            string memory revertMsg = _getRevertMsg(reason);
            emit DebugSwapError(msg.sender, address(0), amountIn, revertMsg);
            revert(revertMsg);
        }
    }

    /**
     * @notice Swaps ERC20 token to USDC using Uniswap V3
     * @dev If swap fails, returns the original token to user
     * @param tokenIn Address of the input token
     * @param amountIn Amount of input token to swap
     * @param minAmountOut Minimum amount of USDC to receive
     * @return amountOut Amount of USDC received
     */
    function _swapWithUniswapV3ERC20(
        address tokenIn,
        uint256 amountIn,
        uint256 minAmountOut
    ) internal returns (uint256 amountOut) {
        // Approve input token for swap router
        IERC20(tokenIn).approve(address(swapRouter), amountIn);

        // Perform the swap
        IV3SwapRouter.ExactInputSingleParams memory params = IV3SwapRouter
            .ExactInputSingleParams({
                tokenIn: tokenIn,
                tokenOut: USDC,
                fee: UNISWAP_POOL_FEE,
                recipient: address(this),
                amountIn: amountIn,
                amountOutMinimum: minAmountOut,
                sqrtPriceLimitX96: 0
            });

        try swapRouter.exactInputSingle(params) returns (uint256 amountOut_) {
            amountOut = amountOut_;
            emit TokenSwapped(msg.sender, tokenIn, amountIn, amountOut);
        } catch (bytes memory reason) {
            // If swap fails, return tokens to user
            IERC20(tokenIn).transfer(msg.sender, amountIn);

            string memory revertMsg = _getRevertMsg(reason);
            emit DebugSwapError(msg.sender, tokenIn, amountIn, revertMsg);
            revert(revertMsg);
        }
    }

    /**
     * @notice Extracts revert message from bytes data
     * @dev Helper function to decode revert messages from failed swaps
     * @param _returnData Bytes data from the revert
     * @return Revert message as string
     */
    function _getRevertMsg(
        bytes memory _returnData
    ) internal pure returns (string memory) {
        if (_returnData.length < 68) return "Swap failed: Unknown error";
        assembly {
            _returnData := add(_returnData, 0x04)
        }
        return abi.decode(_returnData, (string));
    }

    // View functions

    /**
     * @notice Gets payment history for a specific wallet
     * @param wallet Address of the wallet
     * @return Array of payment records
     */
    function getPaymentHistory(
        address wallet
    ) external view returns (PaymentRecord[] memory) {
        return paymentHistory[wallet];
    }

    /**
     * @notice Gets payment history for a specific merchant
     * @param merchant Address of the merchant
     * @return Array of payment records
     */
    function getMerchantHistory(
        address merchant
    ) external view returns (PaymentRecord[] memory) {
        return merchantHistory[merchant];
    }

    /**
     * @notice Checks if a payment transaction was successful
     * @param txHash Hash of the payment transaction
     * @return True if payment was successful
     */
    function wasPaymentSuccessful(bytes32 txHash) external view returns (bool) {
        return paymentSuccess[txHash];
    }

    // Admin functions

    /**
     * @notice Adds a new supported token
     * @dev Only callable by contract owner
     * @param token Address of the token to add
     * @param symbol Symbol of the token
     */
    function addSupportedToken(
        address token,
        string memory symbol
    ) external onlyOwner {
        isSupportedToken[token] = true;
        tokenSymbol[token] = symbol;
        emit SupportedTokenAdded(token, symbol);
    }

    /**
     * @notice Removes a supported token
     * @dev Only callable by contract owner
     * @param token Address of the token to remove
     */
    function removeSupportedToken(address token) external onlyOwner {
        isSupportedToken[token] = false;
        emit SupportedTokenRemoved(token);
    }

    /**
     * @notice Updates the USDC token address
     * @dev Only callable by contract owner
     * @param _usdc New USDC token address
     */
    function setUSDC(address _usdc) external onlyOwner {
        require(_usdc != address(0), "Invalid USDC address");
        USDC = _usdc;
    }

    /**
     * @notice Updates the native token address
     * @dev Only callable by contract owner
     * @param _nativeToken New native token address
     */
    function setNativeToken(address _nativeToken) external onlyOwner {
        require(_nativeToken != address(0), "Invalid native token address");
        nativeToken = _nativeToken;
    }

    /**
     * @notice Updates the swap router address
     * @dev Only callable by contract owner
     * @param _swapRouter New swap router address
     */
    function setSwapRouter(address _swapRouter) external onlyOwner {
        require(_swapRouter != address(0), "Invalid swap router address");
        swapRouter = IV3SwapRouter(_swapRouter);
    }

    /**
     * @notice Updates the fee receiver address
     * @dev Only callable by contract owner
     * @param _feeReceiver New fee receiver address
     */
    function setFeeReceiver(address _feeReceiver) external onlyOwner {
        require(_feeReceiver != address(0), "Invalid fee receiver address");
        address oldFeeReceiver = feeReceiver;
        feeReceiver = _feeReceiver;
        emit FeeReceiverUpdated(oldFeeReceiver, _feeReceiver);
    }

    /**
     * @notice Withdraws stuck ERC20 tokens from the contract
     * @dev Only callable by contract owner. Emergency function to recover stuck tokens.
     * @param token Address of the token to withdraw
     */
    function withdrawStuckToken(address token) external onlyOwner {
        uint256 balance = IERC20(token).balanceOf(address(this));
        if (balance > 0) {
            IERC20(token).transfer(owner(), balance);
        }
    }

    /**
     * @notice Withdraws stuck ETH from the contract
     * @dev Only callable by contract owner. Emergency function to recover stuck ETH.
     */
    function withdrawStuckETH() external onlyOwner {
        uint256 balance = address(this).balance;
        if (balance > 0) {
            payable(owner()).transfer(balance);
        }
    }

    /**
     * @notice Authorizes contract upgrades
     * @dev Only callable by contract owner
     * @param newImplementation Address of the new implementation
     */
    function _authorizeUpgrade(
        address newImplementation
    ) internal override onlyOwner {}

    /**
     * @notice Allows the contract to receive ETH
     * @dev Required for native token deposits
     */
    receive() external payable {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/IERC1363.sol)

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IERC165} from "./IERC165.sol";

/**
 * @title IERC1363
 * @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
 *
 * Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
 * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
 */
interface IERC1363 is IERC20, IERC165 {
    /*
     * Note: the ERC-165 identifier for this interface is 0xb0202a11.
     * 0xb0202a11 ===
     *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
     *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
     */

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @param data Additional data with no specified format, sent in call to `spender`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.20;

/**
 * @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 Storage of the initializable contract.
     *
     * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions
     * when using with upgradeable contracts.
     *
     * @custom:storage-location erc7201:openzeppelin.storage.Initializable
     */
    struct InitializableStorage {
        /**
         * @dev Indicates that the contract has been initialized.
         */
        uint64 _initialized;
        /**
         * @dev Indicates that the contract is in the process of being initialized.
         */
        bool _initializing;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00;

    /**
     * @dev The contract is already initialized.
     */
    error InvalidInitialization();

    /**
     * @dev The contract is not initializing.
     */
    error NotInitializing();

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint64 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 in the context of a constructor an `initializer` may be invoked any
     * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in
     * production.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        // Cache values to avoid duplicated sloads
        bool isTopLevelCall = !$._initializing;
        uint64 initialized = $._initialized;

        // Allowed calls:
        // - initialSetup: the contract is not in the initializing state and no previous version was
        //                 initialized
        // - construction: the contract is initialized at version 1 (no reinitialization) and the
        //                 current contract is just being deployed
        bool initialSetup = initialized == 0 && isTopLevelCall;
        bool construction = initialized == 1 && address(this).code.length == 0;

        if (!initialSetup && !construction) {
            revert InvalidInitialization();
        }
        $._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 2**64 - 1 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint64 version) {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing || $._initialized >= version) {
            revert InvalidInitialization();
        }
        $._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() {
        _checkInitializing();
        _;
    }

    /**
     * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}.
     */
    function _checkInitializing() internal view virtual {
        if (!_isInitializing()) {
            revert NotInitializing();
        }
    }

    /**
     * @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 {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing) {
            revert InvalidInitialization();
        }
        if ($._initialized != type(uint64).max) {
            $._initialized = type(uint64).max;
            emit Initialized(type(uint64).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint64) {
        return _getInitializableStorage()._initialized;
    }

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

    /**
     * @dev Pointer to storage slot. Allows integrators to override it with a custom storage location.
     *
     * NOTE: Consider following the ERC-7201 formula to derive storage locations.
     */
    function _initializableStorageSlot() internal pure virtual returns (bytes32) {
        return INITIALIZABLE_STORAGE;
    }

    /**
     * @dev Returns a pointer to the storage namespace.
     */
    // solhint-disable-next-line var-name-mixedcase
    function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
        bytes32 slot = _initializableStorageSlot();
        assembly {
            $.slot := slot
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {ContextUpgradeable} from "../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.
 *
 * 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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    /// @custom:storage-location erc7201:openzeppelin.storage.Ownable
    struct OwnableStorage {
        address _owner;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant OwnableStorageLocation = 0x9016d09d72d40fdae2fd8ceac6b6234c7706214fd39c1cd1e609a0528c199300;

    function _getOwnableStorage() private pure returns (OwnableStorage storage $) {
        assembly {
            $.slot := OwnableStorageLocation
        }
    }

    /**
     * @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.
     */
    function __Ownable_init(address initialOwner) internal onlyInitializing {
        __Ownable_init_unchained(initialOwner);
    }

    function __Ownable_init_unchained(address initialOwner) internal onlyInitializing {
        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) {
        OwnableStorage storage $ = _getOwnableStorage();
        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 {
        OwnableStorage storage $ = _getOwnableStorage();
        address oldOwner = $._owner;
        $._owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;
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 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 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;

    /// @custom:storage-location erc7201:openzeppelin.storage.ReentrancyGuard
    struct ReentrancyGuardStorage {
        uint256 _status;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ReentrancyGuard")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant ReentrancyGuardStorageLocation = 0x9b779b17422d0df92223018b32b4d1fa46e071723d6817e2486d003becc55f00;

    function _getReentrancyGuardStorage() private pure returns (ReentrancyGuardStorage storage $) {
        assembly {
            $.slot := ReentrancyGuardStorageLocation
        }
    }

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

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

    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
        $._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 {
        ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
        // 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 {
        ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
        // 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) {
        ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
        return $._status == ENTERED;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.22;

import {IERC1822Proxiable} from "@openzeppelin/contracts/interfaces/draft-IERC1822.sol";
import {ERC1967Utils} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Utils.sol";
import {Initializable} from "./Initializable.sol";

/**
 * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
 * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
 *
 * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
 * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
 * `UUPSUpgradeable` with a custom implementation of upgrades.
 *
 * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
 */
abstract contract UUPSUpgradeable is Initializable, IERC1822Proxiable {
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
    address private immutable __self = address(this);

    /**
     * @dev The version of the upgrade interface of the contract. If this getter is missing, both `upgradeTo(address)`
     * and `upgradeToAndCall(address,bytes)` are present, and `upgradeTo` must be used if no function should be called,
     * while `upgradeToAndCall` will invoke the `receive` function if the second argument is the empty byte string.
     * If the getter returns `"5.0.0"`, only `upgradeToAndCall(address,bytes)` is present, and the second argument must
     * be the empty byte string if no function should be called, making it impossible to invoke the `receive` function
     * during an upgrade.
     */
    string public constant UPGRADE_INTERFACE_VERSION = "5.0.0";

    /**
     * @dev The call is from an unauthorized context.
     */
    error UUPSUnauthorizedCallContext();

    /**
     * @dev The storage `slot` is unsupported as a UUID.
     */
    error UUPSUnsupportedProxiableUUID(bytes32 slot);

    /**
     * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
     * a proxy contract with an implementation (as defined in ERC-1967) pointing to self. This should only be the case
     * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
     * function through ERC-1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        _checkProxy();
        _;
    }

    /**
     * @dev Check that the execution is not being performed through a delegate call. This allows a function to be
     * callable on the implementing contract but not through proxies.
     */
    modifier notDelegated() {
        _checkNotDelegated();
        _;
    }

    function __UUPSUpgradeable_init() internal onlyInitializing {
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Implementation of the ERC-1822 {proxiableUUID} function. This returns the storage slot used by the
     * implementation. It is used to validate the implementation's compatibility when performing an upgrade.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
     */
    function proxiableUUID() external view virtual notDelegated returns (bytes32) {
        return ERC1967Utils.IMPLEMENTATION_SLOT;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
     * encoded in `data`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     *
     * @custom:oz-upgrades-unsafe-allow-reachable delegatecall
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) public payable virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, data);
    }

    /**
     * @dev Reverts if the execution is not performed via delegatecall or the execution
     * context is not of a proxy with an ERC-1967 compliant implementation pointing to self.
     */
    function _checkProxy() internal view virtual {
        if (
            address(this) == __self || // Must be called through delegatecall
            ERC1967Utils.getImplementation() != __self // Must be called through an active proxy
        ) {
            revert UUPSUnauthorizedCallContext();
        }
    }

    /**
     * @dev Reverts if the execution is performed via delegatecall.
     * See {notDelegated}.
     */
    function _checkNotDelegated() internal view virtual {
        if (address(this) != __self) {
            // Must not be called through delegatecall
            revert UUPSUnauthorizedCallContext();
        }
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
     * {upgradeToAndCall}.
     *
     * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
     *
     * ```solidity
     * function _authorizeUpgrade(address) internal onlyOwner {}
     * ```
     */
    function _authorizeUpgrade(address newImplementation) internal virtual;

    /**
     * @dev Performs an implementation upgrade with a security check for UUPS proxies, and additional setup call.
     *
     * As a security check, {proxiableUUID} is invoked in the new implementation, and the return value
     * is expected to be the implementation slot in ERC-1967.
     *
     * Emits an {IERC1967-Upgraded} event.
     */
    function _upgradeToAndCallUUPS(address newImplementation, bytes memory data) private {
        try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
            if (slot != ERC1967Utils.IMPLEMENTATION_SLOT) {
                revert UUPSUnsupportedProxiableUUID(slot);
            }
            ERC1967Utils.upgradeToAndCall(newImplementation, data);
        } catch {
            // The implementation is not UUPS
            revert ERC1967Utils.ERC1967InvalidImplementation(newImplementation);
        }
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;
pragma abicoder v2;

import '@uniswap/v3-core/contracts/interfaces/callback/IUniswapV3SwapCallback.sol';

/// @title Router token swapping functionality
/// @notice Functions for swapping tokens via Uniswap V3
interface IV3SwapRouter is IUniswapV3SwapCallback {
    struct ExactInputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 amountIn;
        uint256 amountOutMinimum;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Swaps `amountIn` of one token for as much as possible of another token
    /// @dev Setting `amountIn` to 0 will cause the contract to look up its own balance,
    /// and swap the entire amount, enabling contracts to send tokens before calling this function.
    /// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata
    /// @return amountOut The amount of the received token
    function exactInputSingle(ExactInputSingleParams calldata params) external payable returns (uint256 amountOut);

    struct ExactInputParams {
        bytes path;
        address recipient;
        uint256 amountIn;
        uint256 amountOutMinimum;
    }

    /// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path
    /// @dev Setting `amountIn` to 0 will cause the contract to look up its own balance,
    /// and swap the entire amount, enabling contracts to send tokens before calling this function.
    /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata
    /// @return amountOut The amount of the received token
    function exactInput(ExactInputParams calldata params) external payable returns (uint256 amountOut);

    struct ExactOutputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 amountOut;
        uint256 amountInMaximum;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Swaps as little as possible of one token for `amountOut` of another token
    /// that may remain in the router after the swap.
    /// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata
    /// @return amountIn The amount of the input token
    function exactOutputSingle(ExactOutputSingleParams calldata params) external payable returns (uint256 amountIn);

    struct ExactOutputParams {
        bytes path;
        address recipient;
        uint256 amountOut;
        uint256 amountInMaximum;
    }

    /// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed)
    /// that may remain in the router after the swap.
    /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata
    /// @return amountIn The amount of the input token
    function exactOutput(ExactOutputParams calldata params) external payable returns (uint256 amountIn);
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.6.0;

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

library TransferHelper {
    /// @notice Transfers tokens from the targeted address to the given destination
    /// @notice Errors with 'STF' if transfer fails
    /// @param token The contract address of the token to be transferred
    /// @param from The originating address from which the tokens will be transferred
    /// @param to The destination address of the transfer
    /// @param value The amount to be transferred
    function safeTransferFrom(
        address token,
        address from,
        address to,
        uint256 value
    ) internal {
        (bool success, bytes memory data) =
            token.call(abi.encodeWithSelector(IERC20.transferFrom.selector, from, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'STF');
    }

    /// @notice Transfers tokens from msg.sender to a recipient
    /// @dev Errors with ST if transfer fails
    /// @param token The contract address of the token which will be transferred
    /// @param to The recipient of the transfer
    /// @param value The value of the transfer
    function safeTransfer(
        address token,
        address to,
        uint256 value
    ) internal {
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.transfer.selector, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'ST');
    }

    /// @notice Approves the stipulated contract to spend the given allowance in the given token
    /// @dev Errors with 'SA' if transfer fails
    /// @param token The contract address of the token to be approved
    /// @param to The target of the approval
    /// @param value The amount of the given token the target will be allowed to spend
    function safeApprove(
        address token,
        address to,
        uint256 value
    ) internal {
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.approve.selector, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'SA');
    }

    /// @notice Transfers ETH to the recipient address
    /// @dev Fails with `STE`
    /// @param to The destination of the transfer
    /// @param value The value to be transferred
    function safeTransferETH(address to, uint256 value) internal {
        (bool success, ) = to.call{value: value}(new bytes(0));
        require(success, 'STE');
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

interface IWETH9 {
    function deposit() external payable;

    function withdraw(uint256 amount) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../token/ERC20/IERC20.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../utils/introspection/IERC165.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;
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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.20;

/**
 * @dev ERC-1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822Proxiable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.2.0) (proxy/ERC1967/ERC1967Utils.sol)

pragma solidity ^0.8.22;

import {IBeacon} from "../beacon/IBeacon.sol";
import {IERC1967} from "../../interfaces/IERC1967.sol";
import {Address} from "../../utils/Address.sol";
import {StorageSlot} from "../../utils/StorageSlot.sol";

/**
 * @dev This library provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[ERC-1967] slots.
 */
library ERC1967Utils {
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev The `implementation` of the proxy is invalid.
     */
    error ERC1967InvalidImplementation(address implementation);

    /**
     * @dev The `admin` of the proxy is invalid.
     */
    error ERC1967InvalidAdmin(address admin);

    /**
     * @dev The `beacon` of the proxy is invalid.
     */
    error ERC1967InvalidBeacon(address beacon);

    /**
     * @dev An upgrade function sees `msg.value > 0` that may be lost.
     */
    error ERC1967NonPayable();

    /**
     * @dev Returns the current implementation address.
     */
    function getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the ERC-1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        if (newImplementation.code.length == 0) {
            revert ERC1967InvalidImplementation(newImplementation);
        }
        StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Performs implementation upgrade with additional setup call if data is nonempty.
     * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected
     * to avoid stuck value in the contract.
     *
     * Emits an {IERC1967-Upgraded} event.
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) internal {
        _setImplementation(newImplementation);
        emit IERC1967.Upgraded(newImplementation);

        if (data.length > 0) {
            Address.functionDelegateCall(newImplementation, data);
        } else {
            _checkNonPayable();
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Returns the current admin.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by ERC-1967) using
     * the https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the ERC-1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        if (newAdmin == address(0)) {
            revert ERC1967InvalidAdmin(address(0));
        }
        StorageSlot.getAddressSlot(ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {IERC1967-AdminChanged} event.
     */
    function changeAdmin(address newAdmin) internal {
        emit IERC1967.AdminChanged(getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is the keccak-256 hash of "eip1967.proxy.beacon" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Returns the current beacon.
     */
    function getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the ERC-1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        if (newBeacon.code.length == 0) {
            revert ERC1967InvalidBeacon(newBeacon);
        }

        StorageSlot.getAddressSlot(BEACON_SLOT).value = newBeacon;

        address beaconImplementation = IBeacon(newBeacon).implementation();
        if (beaconImplementation.code.length == 0) {
            revert ERC1967InvalidImplementation(beaconImplementation);
        }
    }

    /**
     * @dev Change the beacon and trigger a setup call if data is nonempty.
     * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected
     * to avoid stuck value in the contract.
     *
     * Emits an {IERC1967-BeaconUpgraded} event.
     *
     * CAUTION: Invoking this function has no effect on an instance of {BeaconProxy} since v5, since
     * it uses an immutable beacon without looking at the value of the ERC-1967 beacon slot for
     * efficiency.
     */
    function upgradeBeaconToAndCall(address newBeacon, bytes memory data) internal {
        _setBeacon(newBeacon);
        emit IERC1967.BeaconUpgraded(newBeacon);

        if (data.length > 0) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        } else {
            _checkNonPayable();
        }
    }

    /**
     * @dev Reverts if `msg.value` is not zero. It can be used to avoid `msg.value` stuck in the contract
     * if an upgrade doesn't perform an initialization call.
     */
    function _checkNonPayable() private {
        if (msg.value > 0) {
            revert ERC1967NonPayable();
        }
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Callback for IUniswapV3PoolActions#swap
/// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface
interface IUniswapV3SwapCallback {
    /// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
    /// @dev In the implementation you must pay the pool tokens owed for the swap.
    /// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
    /// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
    /// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
    /// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
    /// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
    function uniswapV3SwapCallback(
        int256 amount0Delta,
        int256 amount1Delta,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[ERC].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.20;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeacon {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {UpgradeableBeacon} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC1967.sol)

pragma solidity ^0.8.20;

/**
 * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
 */
interface IERC1967 {
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Emitted when the beacon is changed.
     */
    event BeaconUpgraded(address indexed beacon);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

pragma solidity ^0.8.20;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC-1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     // Define the slot. Alternatively, use the SlotDerivation library to derive the slot.
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(newImplementation.code.length > 0);
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * TIP: Consider using this library along with {SlotDerivation}.
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct Int256Slot {
        int256 value;
    }

    struct StringSlot {
        string value;
    }

    struct BytesSlot {
        bytes value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `Int256Slot` with member `value` located at `slot`.
     */
    function getInt256Slot(bytes32 slot) internal pure returns (Int256Slot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `StringSlot` with member `value` located at `slot`.
     */
    function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        assembly ("memory-safe") {
            r.slot := store.slot
        }
    }

    /**
     * @dev Returns a `BytesSlot` with member `value` located at `slot`.
     */
    function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        assembly ("memory-safe") {
            r.slot := store.slot
        }
    }
}