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// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.20;

import { CoreSwapHandlerV1 } from "../../core/CoreSwapHandler/CoreSwapHandlerV1.sol";
import { IMetaSwapHandler } from "./IMetaSwapHandler.sol";
import {
    AlreadyInitialized,
    SwapDeadlineExceeded,
    InvalidDestinationSwapper
} from "../../core/libraries/DefinitiveErrors.sol";
import { DefinitiveConstants } from "../../core/libraries/DefinitiveConstants.sol";

import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";

/**
 * @title MetaSwapHandler
 * @author WardenJakx
 * @notice Meta swap handler to swap anywhere
 */
contract MetaSwapHandler is CoreSwapHandlerV1, IMetaSwapHandler, Ownable {
    bool isInitialized;
    address immutable _this;

    receive() external payable {}

    mapping(address => bool) public whitelistedSwapContracts;

    constructor() Ownable(msg.sender) {
        _this = address(this);
    }

    /**
     * @param owner we may not be using msgSender() so an owner address is specified to be the owner
     * @param whitelistedContracts DEX routers to whitelist (eg 0x router)m
     */
    function initialize(address owner, address[] calldata whitelistedContracts) external {
        if (isInitialized) {
            revert AlreadyInitialized();
        }
        isInitialized = true;
        transferOwnership(owner);
        _updateWhitelist(whitelistedContracts, true);
    }

    function decodeParams(bytes memory data) public pure returns (MetaSwapParams memory metaSwapParams) {
        metaSwapParams = abi.decode(data, (MetaSwapParams));
    }

    function removeFromWhitelist(address[] calldata contracts) external onlyOwner {
        _updateWhitelist(contracts, false);
    }

    function addToWhitelist(address[] calldata contracts) external onlyOwner {
        _updateWhitelist(contracts, true);
    }

    function _performSwap(SwapParams memory params) internal override {
        MetaSwapParams memory swapParams = abi.decode(params.data, (MetaSwapParams));
        Address.functionCallWithValue(
            swapParams.underlyingSwapRouterAddress,
            swapParams.swapData,
            params.inputAssetAddress == DefinitiveConstants.NATIVE_ASSET_ADDRESS ? params.inputAmount : 0
        );
    }

    function _getSpenderAddress(bytes memory data) internal pure override returns (address) {
        MetaSwapParams memory swapParams = abi.decode(data, (MetaSwapParams));
        return swapParams.underlyingSwapRouterAddress;
    }

    function _validatePools(SwapParams memory, bool) internal view override {}

    function _validateSwap(SwapParams memory params) internal view override {
        MetaSwapParams memory swapParams = abi.decode(params.data, (MetaSwapParams));
        bool swapRouterIsWhitelisted = address(this) == _this
            ? whitelistedSwapContracts[swapParams.underlyingSwapRouterAddress]
            : MetaSwapHandler(payable(_this)).whitelistedSwapContracts(swapParams.underlyingSwapRouterAddress);

        if (!swapRouterIsWhitelisted) {
            revert InvalidDestinationSwapper();
        }

        if (swapParams.deadline < block.timestamp) {
            revert SwapDeadlineExceeded();
        }
    }

    function _updateWhitelist(address[] memory contracts, bool isWhitelisted) private {
        uint256 contractsLength = contracts.length;
        for (uint256 i; i < contractsLength; ) {
            whitelistedSwapContracts[contracts[i]] = isWhitelisted;

            unchecked {
                ++i;
            }
        }
    }
}

// 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 v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.20;

/**
 * @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.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
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].
     *
     * CAUTION: See Security Considerations above.
     */
    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 v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @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 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 v5.0.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC20Permit} from "../extensions/IERC20Permit.sol";
import {Address} from "../../../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 An operation with an ERC20 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 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);
        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.
     */
    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.
     */
    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 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);
        if (returndata.length != 0 && !abi.decode(returndata, (bool))) {
            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 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(token).code.length > 0;
    }
}

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

pragma solidity ^0.8.20;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error AddressInsufficientBalance(address account);

    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

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

    /**
     * @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 AddressInsufficientBalance(address(this));
        }

        (bool success, ) = recipient.call{value: amount}("");
        if (!success) {
            revert FailedInnerCall();
        }
    }

    /**
     * @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
     * {FailedInnerCall} 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 AddressInsufficientBalance(address(this));
        }
        (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 {FailedInnerCall}) 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 {FailedInnerCall} 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 {FailedInnerCall}.
     */
    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
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert FailedInnerCall();
        }
    }
}

// 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 v5.0.0) (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 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: UNLICENSED
pragma solidity >=0.8.20;

import {
    InvalidExecutedOutputAmount,
    InvalidMsgValue,
    InvalidSwapInputAmount
} from "../libraries/DefinitiveErrors.sol";
import { DefinitiveConstants } from "../libraries/DefinitiveConstants.sol";
import { DefinitiveAssets, IERC20 } from "../libraries/DefinitiveAssets.sol";
import { Context } from "@openzeppelin/contracts/utils/Context.sol";
import { ICoreSwapHandlerV1 } from "./ICoreSwapHandlerV1.sol";
import { ReentrancyGuard } from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";

abstract contract CoreSwapHandlerV1 is ICoreSwapHandlerV1, Context, ReentrancyGuard {
    using DefinitiveAssets for IERC20;

    function swapCall(SwapParams calldata params) external payable nonReentrant returns (uint256, address) {
        return _swapCall(params, false /* enforceAllowedPools */);
    }

    function swapDelegate(SwapParams calldata params) external payable nonReentrant returns (uint256, address) {
        return _swapDelegate(params, false /* enforceAllowedPools */);
    }

    function swapUsingValidatedPathCall(
        SwapParams calldata params
    ) external payable nonReentrant returns (uint256, address) {
        return _swapCall(params, true /* enforceAllowedPools */);
    }

    function _swapCall(
        SwapParams memory params,
        bool enforceAllowedPools
    ) private returns (uint256 amountOut, address) {
        bool isInputAddressNativeAsset = params.inputAssetAddress == DefinitiveConstants.NATIVE_ASSET_ADDRESS;
        uint256 rawInputAmount = params.inputAmount;

        // Calls to swap native assets must provide a non-zero input amount
        if (isInputAddressNativeAsset && rawInputAmount == 0) {
            revert InvalidSwapInputAmount();
        }

        // Calls to swap native assets must match the input amount and msg.value
        if (isInputAddressNativeAsset && rawInputAmount != msg.value) {
            revert InvalidMsgValue();
        }

        // Calls to swap non-native assets must have msg.value equal to 0
        if (!isInputAddressNativeAsset && msg.value != 0) {
            revert InvalidMsgValue();
        }

        // Update SwapParams with parsed input amount
        params.inputAmount = rawInputAmount > 0 ? rawInputAmount : _getTokenAllowance(params.inputAssetAddress);

        if (params.inputAssetAddress != DefinitiveConstants.NATIVE_ASSET_ADDRESS) {
            IERC20(params.inputAssetAddress).safeTransferFrom(_msgSender(), address(this), params.inputAmount);
        }

        _validateSwap(params);
        _validatePools(params, enforceAllowedPools);

        (amountOut, ) = _swap(params);

        if (params.outputAssetAddress == DefinitiveConstants.NATIVE_ASSET_ADDRESS) {
            DefinitiveAssets.safeTransferETH(payable(_msgSender()), amountOut);
        } else {
            IERC20(params.outputAssetAddress).safeTransfer(_msgSender(), amountOut);
        }

        return (amountOut, params.outputAssetAddress);
    }

    function _swapDelegate(SwapParams memory params, bool enforceAllowedPools) private returns (uint256, address) {
        uint256 rawInputAmount = params.inputAmount;
        uint256 parsedInputAmount = rawInputAmount > 0
            ? rawInputAmount
            : DefinitiveAssets.getBalance(params.inputAssetAddress);

        if (parsedInputAmount == 0) {
            revert InvalidSwapInputAmount();
        }
        // Update SwapParams with parsed input amount
        params.inputAmount = parsedInputAmount;

        _validateSwap(params);
        _validatePools(params, enforceAllowedPools);

        return _swap(params);
    }

    /**
     * @notice This method holds the logic for performing the swap.
     * @param params SwapParams
     */
    function _performSwap(SwapParams memory params) internal virtual;

    /**
     * @notice Method to confirm that the swap is using valid pools based on our criteria
     * @param params SwapParams
     * @param enforceAllowedPools boolean to determine if we should enforce allowed pools
     */
    function _validatePools(SwapParams memory params, bool enforceAllowedPools) internal virtual;

    /**
     * @notice Method to confirm that the swap parameters are valid for the third party
     * @param params SwapParams
     */
    function _validateSwap(SwapParams memory params) internal virtual;

    /**
     * @notice When `rawInputAmount` is 0, `swapCall` will use the allowance as the input amount
     * @param inputAssetAddress asset to swap from
     */
    function _getTokenAllowance(address inputAssetAddress) private view returns (uint256) {
        uint256 allowance = IERC20(inputAssetAddress).allowance(_msgSender(), address(this));

        if (allowance == 0) {
            revert InvalidSwapInputAmount();
        }

        return allowance;
    }

    /**
     * @notice Returns the address we need to approve in order to swap assets
     * @param data included with the swap method invocation
     */
    function _getSpenderAddress(bytes memory data) internal virtual returns (address);

    /**
     * @notice Internal swap logic that performs the swap and validates the output amount
     * @param params SwapParams
     * @return output amount and output asset address
     */
    function _swap(SwapParams memory params) private returns (uint256, address) {
        if (params.inputAssetAddress != DefinitiveConstants.NATIVE_ASSET_ADDRESS) {
            IERC20(params.inputAssetAddress).resetAndSafeIncreaseAllowance(
                address(this),
                _getSpenderAddress(params.data),
                params.inputAmount
            );
        }

        uint256 outputAmountDelta = DefinitiveAssets.getBalance(params.outputAssetAddress);

        _performSwap(params);

        outputAmountDelta = DefinitiveAssets.getBalance(params.outputAssetAddress) - outputAmountDelta;

        if (outputAmountDelta < params.minOutputAmount) {
            revert InvalidExecutedOutputAmount();
        }

        emit Swap(
            _msgSender(),
            params.inputAssetAddress,
            params.inputAmount,
            params.outputAssetAddress,
            outputAmountDelta
        );

        return (outputAmountDelta, params.outputAssetAddress);
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.20;

interface ICoreSwapHandlerV1 {
    event Swap(
        address indexed actor,
        address indexed inputToken,
        uint256 inputAmount,
        address indexed outputToken,
        uint256 outputAmount
    );

    struct SwapParams {
        address inputAssetAddress;
        uint256 inputAmount;
        address outputAssetAddress;
        uint256 minOutputAmount;
        bytes data;
        bytes signature;
    }

    function swapCall(SwapParams calldata params) external payable returns (uint256 amountOut, address outputAsset);

    function swapDelegate(SwapParams calldata params) external payable returns (uint256 amountOut, address outputAsset);

    function swapUsingValidatedPathCall(
        SwapParams calldata params
    ) external payable returns (uint256 amountOut, address outputAsset);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.20;

import { IERC20, SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { SafeTransferLib } from "solmate/src/utils/SafeTransferLib.sol";
import { DefinitiveConstants } from "./DefinitiveConstants.sol";

import { InsufficientBalance, InvalidAmount, InvalidAmounts, InvalidERC20Address } from "./DefinitiveErrors.sol";

/**
 * @notice Contains methods used throughout the Definitive contracts
 * @dev This file should only be used as an internal library.
 */
library DefinitiveAssets {
    /**
     * @dev Checks if an address is a valid ERC20 token
     */
    modifier onlyValidERC20(address erc20Token) {
        if (address(erc20Token) == DefinitiveConstants.NATIVE_ASSET_ADDRESS) {
            revert InvalidERC20Address();
        }
        _;
    }

    //////////////////////////////////////////////////
    //////////////////////////////////////////////////
    // ↓ ERC20 and Native Asset Methods ↓
    //////////////////////////////////////////////////

    /**
     * @dev Gets the balance of an ERC20 token or native asset
     */
    function getBalance(address assetAddress) internal view returns (uint256) {
        if (assetAddress == DefinitiveConstants.NATIVE_ASSET_ADDRESS) {
            return address(this).balance;
        } else {
            return IERC20(assetAddress).balanceOf(address(this));
        }
    }

    /**
     * @dev internal function to validate balance is higher than a given amount for ERC20 and native assets
     */
    function validateBalance(address token, uint256 amount) internal view {
        if (token == DefinitiveConstants.NATIVE_ASSET_ADDRESS) {
            validateNativeBalance(amount);
        } else {
            validateERC20Balance(token, amount);
        }
    }

    //////////////////////////////////////////////////
    //////////////////////////////////////////////////
    // ↓ Native Asset Methods ↓
    //////////////////////////////////////////////////

    /**
     * @dev validates amount and balance, then uses SafeTransferLib to transfer native asset
     */
    function safeTransferETH(address recipient, uint256 amount) internal {
        if (amount > 0) {
            SafeTransferLib.safeTransferETH(payable(recipient), amount);
        }
    }

    //////////////////////////////////////////////////
    //////////////////////////////////////////////////
    // ↓ ERC20 Methods ↓
    //////////////////////////////////////////////////

    /**
     * @dev Resets and increases the allowance of a spender for an ERC20 token
     */
    function resetAndSafeIncreaseAllowance(
        IERC20 token,
        address owner,
        address spender,
        uint256 amount
    ) internal onlyValidERC20(address(token)) {
        return SafeERC20.forceApprove(token, spender, amount);
    }

    function safeTransfer(IERC20 token, address to, uint256 amount) internal onlyValidERC20(address(token)) {
        if (amount > 0) {
            SafeERC20.safeTransfer(token, to, amount);
        }
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal onlyValidERC20(address(token)) {
        if (amount > 0) {
            //slither-disable-next-line arbitrary-send-erc20
            SafeERC20.safeTransferFrom(token, from, to, amount);
        }
    }

    //////////////////////////////////////////////////
    //////////////////////////////////////////////////
    // ↓ Asset Amount Helper Methods ↓
    //////////////////////////////////////////////////

    /**
     * @dev internal function to validate that amounts contains a value greater than zero
     */
    function validateAmounts(uint256[] calldata amounts) internal pure {
        bool hasValidAmounts;
        uint256 amountsLength = amounts.length;
        for (uint256 i; i < amountsLength; ) {
            if (amounts[i] > 0) {
                hasValidAmounts = true;
                break;
            }
            unchecked {
                ++i;
            }
        }

        if (!hasValidAmounts) {
            revert InvalidAmounts();
        }
    }

    /**
     * @dev internal function to validate if native asset balance is higher than the amount requested
     */
    function validateNativeBalance(uint256 amount) internal view {
        if (getBalance(DefinitiveConstants.NATIVE_ASSET_ADDRESS) < amount) {
            revert InsufficientBalance();
        }
    }

    /**
     * @dev internal function to validate balance is higher than the amount requested for a token
     */
    function validateERC20Balance(address token, uint256 amount) internal view onlyValidERC20(token) {
        if (getBalance(token) < amount) {
            revert InsufficientBalance();
        }
    }

    function validateAmount(uint256 _amount) internal pure {
        if (_amount == 0) {
            revert InvalidAmount();
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.20;

/**
 * @notice Contains constants used throughout the Definitive contracts
 * @dev This file should only be used as an internal library.
 */
library DefinitiveConstants {
    /**
     * @notice Maximum fee percentage
     */
    uint256 internal constant MAX_FEE_PCT = 10000;

    /**
     * @notice Address to signify native assets
     */
    address internal constant NATIVE_ASSET_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    /**
     * @notice Maximum number of swaps allowed per block
     */
    uint8 internal constant MAX_SWAPS_PER_BLOCK = 25;

    struct Assets {
        uint256[] amounts;
        address[] addresses;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.20;

/**
 * @notice Contains all errors used throughout the Definitive contracts
 * @dev This file should only be used as an internal library.
 * @dev When adding a new error, add alphabetically
 */

error AccountMissingRole(address _account, bytes32 _role);
error AccountNotAdmin(address);
error AccountNotWhitelisted(address);
error AddLiquidityFailed();
error AlreadyDeployed();
error AlreadyInitialized();
error BytecodeEmpty();
error DeadlineExceeded();
error DeployInitFailed();
error DeployFailed();
error BorrowFailed(uint256 errorCode);
error DecollateralizeFailed(uint256 errorCode);
error DepositMoreThanMax();
error EmptyBytecode();
error EnterAllFailed();
error EnforcedSafeLTV(uint256 invalidLTV);
error ExceededMaxDelta();
error ExceededMaxLTV();
error ExceededShareToAssetRatioDeltaThreshold();
error ExitAllFailed();
error ExitOneCoinFailed();
error GlobalStopGuardianEnabled();
error InitializeMarketsFailed();
error InputGreaterThanStaked();
error InsufficientBalance();
error InsufficientSwapTokenBalance();
error InvalidAddress();
error InvalidAmount();
error InvalidAmounts();
error InvalidCalldata();
error InvalidDestinationSwapper();
error InvalidERC20Address();
error InvalidExecutedOutputAmount();
error InvalidFeePercent();
error InvalidHandler();
error InvalidInputs();
error InvalidMsgValue();
error InvalidSingleHopSwap();
error InvalidMultiHopSwap();
error InvalidOutputToken();
error InvalidRedemptionRecipient(); // Used in cross-chain redeptions
error InvalidReportedOutputAmount();
error InvalidRewardsClaim();
error InvalidSignature();
error InvalidSignatureLength();
error InvalidSwapHandler();
error InvalidSwapInputAmount();
error InvalidSwapOutputToken();
error InvalidSwapPath();
error InvalidSwapPayload();
error InvalidSwapToken();
error MintMoreThanMax();
error MismatchedChainId();
error NativeAssetWrapFailed(bool wrappingToNative);
error NoSignatureVerificationSignerSet();
error RedeemMoreThanMax();
error RemoveLiquidityFailed();
error RepayDebtFailed();
error SafeHarborModeEnabled();
error SafeHarborRedemptionDisabled();
error SlippageExceeded(uint256 _outputAmount, uint256 _outputAmountMin);
error StakeFailed();
error SupplyFailed();
error StopGuardianEnabled();
error TradingDisabled();
error SwapDeadlineExceeded();
error SwapLimitExceeded();
error SwapTokenIsOutputToken();
error TransfersLimitExceeded();
error UnstakeFailed();
error UnauthenticatedFlashloan();
error UntrustedFlashLoanSender(address);
error WithdrawMoreThanMax();
error WithdrawalsDisabled();
error ZeroShares();

// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.20;

import { ICoreSwapHandlerV1 } from "../../core/CoreSwapHandler/ICoreSwapHandlerV1.sol";

interface IMetaSwapHandler is ICoreSwapHandlerV1 {
    struct MetaSwapParams {
        uint256 deadline;
        address underlyingSwapRouterAddress;
        bytes swapData;
    }

    /// @dev Needed for core
    function decodeParams(bytes memory data) external pure returns (MetaSwapParams memory);

    function removeFromWhitelist(address[] memory swapContracts) external;

    function addToWhitelist(address[] memory swapContracts) external;
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Transfer(address indexed from, address indexed to, uint256 amount);

    event Approval(address indexed owner, address indexed spender, uint256 amount);

    /*//////////////////////////////////////////////////////////////
                            METADATA STORAGE
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    uint8 public immutable decimals;

    /*//////////////////////////////////////////////////////////////
                              ERC20 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;

    mapping(address => mapping(address => uint256)) public allowance;

    /*//////////////////////////////////////////////////////////////
                            EIP-2612 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 internal immutable INITIAL_CHAIN_ID;

    bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;

    mapping(address => uint256) public nonces;

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;

        INITIAL_CHAIN_ID = block.chainid;
        INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
    }

    /*//////////////////////////////////////////////////////////////
                               ERC20 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 amount) public virtual returns (bool) {
        allowance[msg.sender][spender] = amount;

        emit Approval(msg.sender, spender, amount);

        return true;
    }

    function transfer(address to, uint256 amount) public virtual returns (bool) {
        balanceOf[msg.sender] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(msg.sender, to, amount);

        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.

        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;

        balanceOf[from] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(from, to, amount);

        return true;
    }

    /*//////////////////////////////////////////////////////////////
                             EIP-2612 LOGIC
    //////////////////////////////////////////////////////////////*/

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual {
        require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");

        // Unchecked because the only math done is incrementing
        // the owner's nonce which cannot realistically overflow.
        unchecked {
            address recoveredAddress = ecrecover(
                keccak256(
                    abi.encodePacked(
                        "\x19\x01",
                        DOMAIN_SEPARATOR(),
                        keccak256(
                            abi.encode(
                                keccak256(
                                    "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
                                ),
                                owner,
                                spender,
                                value,
                                nonces[owner]++,
                                deadline
                            )
                        )
                    )
                ),
                v,
                r,
                s
            );

            require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");

            allowance[recoveredAddress][spender] = value;
        }

        emit Approval(owner, spender, value);
    }

    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
    }

    function computeDomainSeparator() internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                    keccak256(bytes(name)),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 amount) internal virtual {
        totalSupply += amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal virtual {
        balanceOf[from] -= amount;

        // Cannot underflow because a user's balance
        // will never be larger than the total supply.
        unchecked {
            totalSupply -= amount;
        }

        emit Transfer(from, address(0), amount);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

import {ERC20} from "../tokens/ERC20.sol";

/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol)
/// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer.
/// @dev Note that none of the functions in this library check that a token has code at all! That responsibility is delegated to the caller.
library SafeTransferLib {
    /*//////////////////////////////////////////////////////////////
                             ETH OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferETH(address to, uint256 amount) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Transfer the ETH and store if it succeeded or not.
            success := call(gas(), to, amount, 0, 0, 0, 0)
        }

        require(success, "ETH_TRANSFER_FAILED");
    }

    /*//////////////////////////////////////////////////////////////
                            ERC20 OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferFrom(
        ERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), from) // Append the "from" argument.
            mstore(add(freeMemoryPointer, 36), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 68), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 100 because the length of our calldata totals up like so: 4 + 32 * 3.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 100, 0, 32)
            )
        }

        require(success, "TRANSFER_FROM_FAILED");
    }

    function safeTransfer(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "TRANSFER_FAILED");
    }

    function safeApprove(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "APPROVE_FAILED");
    }
}

{
  "evmVersion": "paris",
  "metadata": {
    "bytecodeHash": "none"
  },
  "optimizer": {
    "enabled": true,
    "runs": 500
  },
  "viaIR": false,
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"AddressEmptyCode","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"AddressInsufficientBalance","type":"error"},{"inputs":[],"name":"AlreadyInitialized","type":"error"},{"inputs":[],"name":"FailedInnerCall","type":"error"},{"inputs":[],"name":"InvalidDestinationSwapper","type":"error"},{"inputs":[],"name":"InvalidERC20Address","type":"error"},{"inputs":[],"name":"InvalidExecutedOutputAmount","type":"error"},{"inputs":[],"name":"InvalidMsgValue","type":"error"},{"inputs":[],"name":"InvalidSwapInputAmount","type":"error"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"OwnableInvalidOwner","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"OwnableUnauthorizedAccount","type":"error"},{"inputs":[],"name":"ReentrancyGuardReentrantCall","type":"error"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"SafeERC20FailedOperation","type":"error"},{"inputs":[],"name":"SwapDeadlineExceeded","type":"error"},{"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":"actor","type":"address"},{"indexed":true,"internalType":"address","name":"inputToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"inputAmount","type":"uint256"},{"indexed":true,"internalType":"address","name":"outputToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"outputAmount","type":"uint256"}],"name":"Swap","type":"event"},{"inputs":[{"internalType":"address[]","name":"contracts","type":"address[]"}],"name":"addToWhitelist","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"data","type":"bytes"}],"name":"decodeParams","outputs":[{"components":[{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"address","name":"underlyingSwapRouterAddress","type":"address"},{"internalType":"bytes","name":"swapData","type":"bytes"}],"internalType":"struct IMetaSwapHandler.MetaSwapParams","name":"metaSwapParams","type":"tuple"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address[]","name":"whitelistedContracts","type":"address[]"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"contracts","type":"address[]"}],"name":"removeFromWhitelist","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"inputAssetAddress","type":"address"},{"internalType":"uint256","name":"inputAmount","type":"uint256"},{"internalType":"address","name":"outputAssetAddress","type":"address"},{"internalType":"uint256","name":"minOutputAmount","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"}],"internalType":"struct ICoreSwapHandlerV1.SwapParams","name":"params","type":"tuple"}],"name":"swapCall","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"inputAssetAddress","type":"address"},{"internalType":"uint256","name":"inputAmount","type":"uint256"},{"internalType":"address","name":"outputAssetAddress","type":"address"},{"internalType":"uint256","name":"minOutputAmount","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"}],"internalType":"struct ICoreSwapHandlerV1.SwapParams","name":"params","type":"tuple"}],"name":"swapDelegate","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"inputAssetAddress","type":"address"},{"internalType":"uint256","name":"inputAmount","type":"uint256"},{"internalType":"address","name":"outputAssetAddress","type":"address"},{"internalType":"uint256","name":"minOutputAmount","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"}],"internalType":"struct ICoreSwapHandlerV1.SwapParams","name":"params","type":"tuple"}],"name":"swapUsingValidatedPathCall","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"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":"whitelistedSwapContracts","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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