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// SPDX-License-Identifier: GPL-2.0-or-later
// website: https://www.zkswap.finance

pragma solidity 0.8.27;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

/// @notice Interface for Permit2, a token approval system
interface IPermit2 {
    function approve(address token, address spender, uint160 amount, uint48 expiration) external;

    function allowance(address owner, address token, address spender)
        external
        view
        returns (uint160 amount, uint48 expiration, uint48 nonce);
}

/// @title AggregatorSmart
/// @notice A smart contract that allows users to interact with whitelisted swap aggregators
/// @dev This contract serves as a trusted intermediary for executing swaps through various aggregators
contract AggregatorSmart is ReentrancyGuard {
    using SafeERC20 for IERC20;
    /// @notice The address representing ETH, used for native ETH transactions

    address constant ETH_ADDRESS = address(1);

    /// @notice The owner of this contract who can whitelist/remove aggregators
    address public owner;

    /// @notice Mapping to track whitelisted aggregator contracts
    mapping(address => bool) public whitelistedAggregators;

    /// @notice Address of the Permit2 contract for token approvals
    mapping(address => address) public aggregatorWithPermit2;

    /// @notice Emitted when an aggregator is added to the whitelist
    /// @param aggregator The address of the aggregator contract
    event AggregatorWhitelisted(address indexed aggregator);

    /// @notice Emitted when an aggregator is set with a Permit2 contract
    /// @param aggregator The address of the aggregator contract
    /// @param permit2 The address of the Permit2 contract associated with the aggregator
    event AggregatorWithPermit2(address indexed aggregator, address indexed permit2);

    /// @notice Emitted when an aggregator is removed from the whitelist
    /// @param aggregator The address of the aggregator contract
    event AggregatorRemoved(address indexed aggregator);

    /// @notice Emitted when a swap is executed
    /// @param user The address of the user initiating the swap
    /// @param aggregator The aggregator contract used for the swap
    /// @param tokenIn The input token address
    /// @param amountIn The amount of input tokens
    event SwapSmart(address indexed user, address indexed aggregator, address indexed tokenIn, uint256 amountIn);

    /// @notice Emitted when tokens are approved for an aggregator
    /// @param token The token address that was approved
    /// @param aggregator The aggregator that was approved to spend tokens
    /// @param amount The approved amount
    event TokenApproved(address indexed token, address indexed aggregator, uint256 amount);

    /// @notice Emitted when tokens are recovered in an emergency
    /// @param token The address of the token that was recovered
    /// @param to The address to which the tokens were sent
    /// @param amount The amount of tokens that were recovered
    event EmergencyRecover(address indexed token, address indexed to, uint256 amount);

    /// @notice Emitted when ETH is recovered in an emergency
    /// @param to The address to which the ETH was sent
    /// @param amount The amount of ETH that was recovered
    event EmergencyRecoverETH(address indexed to, uint256 amount);

    /// @notice Emitted when ownership is transferred
    /// @param previousOwner The previous owner address
    /// @param newOwner The new owner address
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /// @notice Modifier to restrict access to only the owner
    modifier onlyOwner() {
        require(msg.sender == owner, "AggregatorSmart: caller is not the owner");
        _;
    }

    /// @notice Constructor sets the deployer as the initial owner
    constructor() {
        owner = msg.sender;
        emit OwnershipTransferred(address(0), msg.sender);
    }

    /// @notice Executes a swap through a whitelisted aggregator
    /// @param aggregator The address of the whitelisted aggregator to use
    /// @param tokenIn The address of the input token
    /// @param amountIn The amount of input tokens to swap
    /// @param callData The calldata to execute on the aggregator
    /// @return success Whether the aggregator call was successful
    /// @return returnData The return data from the aggregator call
    function swapSmart(address aggregator, address tokenIn, uint256 amountIn, bytes calldata callData)
        external
        payable
        nonReentrant
        returns (bool success, bytes memory returnData)
    {
        // Verify aggregator is whitelisted
        require(whitelistedAggregators[aggregator], "AggregatorSmart: aggregator not whitelisted");
        require(amountIn > 0, "AggregatorSmart: amount must be greater than 0");
        require(callData.length > 0, "AggregatorSmart: empty calldata");

        // Emit the swap executed event
        emit SwapSmart(msg.sender, aggregator, tokenIn, amountIn);

        if (tokenIn == ETH_ADDRESS) {
            // Handle native ETH swap
            require(msg.value == amountIn, "AggregatorSmart: ETH amount mismatch");

            // Execute the swap through the aggregator with ETH value
            (success, returnData) = aggregator.call{value: amountIn}(callData);
            require(success, "AggregatorSmart: aggregator call failed");
        } else {
            // Handle ERC20 token swap
            require(tokenIn != address(0), "AggregatorSmart: invalid token address");
            require(msg.value == 0, "AggregatorSmart: unexpected ETH sent for ERC20 swap");

            // Transfer tokens from user to this contract
            IERC20(tokenIn).safeTransferFrom(msg.sender, address(this), amountIn);

            address permit2Address = aggregatorWithPermit2[aggregator];
            if (permit2Address != address(0)) {
                // Approve the Permit2 contract to spend the tokens if needed
                approveIfNeeded(tokenIn, permit2Address, amountIn);
                // Approve the aggregator to spend the tokens through Permit2
                approveAggregatorThroughPermit2(tokenIn, aggregator, permit2Address, amountIn);
            } else {
                // Approve the aggregator to spend the tokens if needed
                approveIfNeeded(tokenIn, aggregator, amountIn);
            }

            // Execute the swap through the aggregator
            (success, returnData) = aggregator.call(callData);
            require(success, "AggregatorSmart: aggregator call failed");
        }
    }

    /// @notice Safely approves tokens for spending, handling non-standard tokens
    /// @param token The token contract address
    /// @param spender The address to approve for spending
    /// @param amount The amount to approve
    function approveIfNeeded(address token, address spender, uint256 amount) internal {
        IERC20 tokenContract = IERC20(token);
        uint256 currentAllowance = tokenContract.allowance(address(this), spender);

        if (currentAllowance < amount) {
            // First set allowance to 0 to handle non-standard tokens like USDT
            if (currentAllowance > 0) {
                _removeAllowance(token, spender);
            }

            // Then set the required allowance
            (bool success,) =
                token.call(abi.encodeWithSelector(tokenContract.approve.selector, spender, type(uint256).max));
            require(success, "AggregatorSmart: approve failed");

            emit TokenApproved(token, spender, type(uint256).max);
        }
    }

    /// @notice Give Universal Router permission through Permit2's allowance system
    function approveAggregatorThroughPermit2(address token, address aggregator, address permit2, uint256 amount)
        internal
    {
        IPermit2 permit2Contract = IPermit2(permit2);

        // Check current Permit2 allowance
        (uint160 currentAmount, uint48 expiration,) = permit2Contract.allowance(address(this), token, aggregator);

        // If allowance is insufficient or expired, set new allowance
        if (currentAmount < amount || expiration < block.timestamp + 3600) {
            permit2Contract.approve(token, aggregator, type(uint160).max, uint48(block.timestamp + 365 days));
        }
    }

    /// @notice Adds an aggregator to the whitelist
    /// @param aggregator The address of the aggregator contract to whitelist
    function setWhitelistAggregator(address aggregator) external onlyOwner {
        require(aggregator != address(0), "AggregatorSmart: invalid aggregator address");
        require(!whitelistedAggregators[aggregator], "AggregatorSmart: aggregator already whitelisted");

        whitelistedAggregators[aggregator] = true;
        emit AggregatorWhitelisted(aggregator);
    }

    function setAggregatorWithPermit2(address aggregator, address permit2) external onlyOwner {
        require(aggregator != address(0), "AggregatorSmart: invalid aggregator address");
        require(permit2 != address(0), "AggregatorSmart: invalid permit2 address");
        aggregatorWithPermit2[aggregator] = permit2;

        emit AggregatorWithPermit2(aggregator, permit2);
    }

    /// @notice Removes an aggregator from the whitelist
    /// @param aggregator The address of the aggregator contract to remove
    function removeAggregator(address aggregator) external onlyOwner {
        require(whitelistedAggregators[aggregator], "AggregatorSmart: aggregator not whitelisted");

        whitelistedAggregators[aggregator] = false;
        emit AggregatorRemoved(aggregator);
    }

    /// @notice Check if an aggregator is whitelisted
    /// @param aggregator The aggregator address to check
    /// @return Whether the aggregator is whitelisted
    function isWhitelisted(address aggregator) external view returns (bool) {
        return whitelistedAggregators[aggregator];
    }

    /// @notice Emergency function to recover any tokens stuck in the contract
    /// @param token The address of the token to recover
    /// @param to The address to send the recovered tokens to
    /// @param amount The amount of tokens to recover
    function emergencyRecover(address token, address to, uint256 amount) external onlyOwner {
        require(to != address(0), "AggregatorSmart: invalid recipient address");
        IERC20(token).safeTransfer(to, amount);

        emit EmergencyRecover(token, to, amount);
    }

    /// @notice Emergency function to recover ETH stuck in the contract
    /// @param to The address to send the ETH to
    /// @param amount The amount of ETH to recover
    function emergencyRecoverETH(address payable to, uint256 amount) external onlyOwner {
        require(to != address(0), "AggregatorSmart: invalid recipient address");
        require(address(this).balance >= amount, "AggregatorSmart: insufficient balance");
        (bool success,) = to.call{value: amount}("");
        require(success, "AggregatorSmart: ETH transfer failed");

        emit EmergencyRecoverETH(to, amount);
    }

    /// @notice Removes allowance for a spender on a specific token
    /// @param token The address of the token to remove allowance for
    /// @param spender The address of the spender to remove allowance for
    function removeAllowance(address token, address spender) external onlyOwner {
        require(token != address(0), "AggregatorSmart: invalid token address");
        require(spender != address(0), "AggregatorSmart: invalid spender address");

        _removeAllowance(token, spender);
    }

    /// @notice Internal function to remove allowance for a spender on a specific token
    /// @param token The address of the token to remove allowance for
    /// @param spender The address of the spender to remove allowance for
    function _removeAllowance(address token, address spender) internal {
        IERC20 tokenContract = IERC20(token);
        // Use low-level call to handle tokens that don't return bool
        (bool success,) = token.call(abi.encodeWithSelector(tokenContract.approve.selector, spender, 0));
        require(success, "AggregatorSmart: approve to 0 failed");
    }

    /// @notice Transfers ownership of the contract to a new account
    /// @param newOwner The address of the new owner
    function transferOwnership(address newOwner) external onlyOwner {
        require(newOwner != address(0), "AggregatorSmart: new owner is the zero address");
        emit OwnershipTransferred(owner, newOwner);
        owner = newOwner;
    }

    /// @notice Fallback function to receive ETH (needed for some aggregator interactions)
    receive() external payable {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
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 amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves `amount` 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 amount) 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 `amount` 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 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` 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 amount) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 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 {
    using Address for address;

    /**
     * @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.encodeWithSelector(token.transfer.selector, 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.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 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.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @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.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

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

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @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).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @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 silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract 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;

    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
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

{
  "remappings": [
    "forge-std/=vendor/forge-std/src/",
    "@openzeppelin/contracts/=vendor/openzeppelin-contracts-v4.9.3/contracts/",
    "solmate/src/=vendor/solmate/src/",
    "solidity-bytes-utils/contracts/=vendor/solidity-bytes-utils/contracts/",
    "@uniswap/lib/contracts/=vendor/solidity-lib/contracts/",
    "@zf/=vendor/@zf/",
    "base64-sol/=vendor/base64-sol/",
    "@uniswap/v2-core/contracts/=vendor/uniswap-v2-core/contracts/",
    "devtools/=vendor/devtools/",
    "ds-test/=vendor/ds-test/src/",
    "layerzero-v2/=vendor/layerzero-v2/",
    "openzeppelin-contracts-upgradeable-v5.2.0/=vendor/openzeppelin-contracts-upgradeable-v5.2.0/contracts/",
    "openzeppelin-contracts-v3.4.2-solc-0.7/=vendor/openzeppelin-contracts-v3.4.2-solc-0.7/contracts/",
    "openzeppelin-contracts-v4.9.3/=vendor/openzeppelin-contracts-v4.9.3/contracts/",
    "openzeppelin-contracts-v5.2.0/=vendor/openzeppelin-contracts-v5.2.0/contracts/",
    "solidity-lib/=vendor/solidity-lib/contracts/",
    "uniswap-v2-core/=vendor/uniswap-v2-core/contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "prague",
  "viaIR": false
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"aggregator","type":"address"}],"name":"AggregatorRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"aggregator","type":"address"}],"name":"AggregatorWhitelisted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"aggregator","type":"address"},{"indexed":true,"internalType":"address","name":"permit2","type":"address"}],"name":"AggregatorWithPermit2","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"EmergencyRecover","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"EmergencyRecoverETH","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"aggregator","type":"address"},{"indexed":true,"internalType":"address","name":"tokenIn","type":"address"},{"indexed":false,"internalType":"uint256","name":"amountIn","type":"uint256"}],"name":"SwapSmart","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":true,"internalType":"address","name":"aggregator","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"TokenApproved","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"aggregatorWithPermit2","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"emergencyRecover","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address payable","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"emergencyRecoverETH","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"aggregator","type":"address"}],"name":"isWhitelisted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"aggregator","type":"address"}],"name":"removeAggregator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"removeAllowance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"aggregator","type":"address"},{"internalType":"address","name":"permit2","type":"address"}],"name":"setAggregatorWithPermit2","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"aggregator","type":"address"}],"name":"setWhitelistAggregator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"aggregator","type":"address"},{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"bytes","name":"callData","type":"bytes"}],"name":"swapSmart","outputs":[{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"returnData","type":"bytes"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"whitelistedAggregators","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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