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// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import { LibFees } from "../../Shared/Libraries/LibFees.sol";
import { LibAsset } from "../../Shared/Libraries/LibAsset.sol";
import { LibSwap } from "../../Shared/Libraries/LibSwap.sol";

import { IBatchSwapFacet } from "../Interfaces/IBatchSwapFacet.sol";

import { Swapper } from "../../Shared/Helpers/Swapper.sol";
import { RefundNative } from "../../Shared/Helpers/RefundNative.sol";

import { SwapData, SwapInfo, FeeType, FeeInfo } from "../../Shared/Types.sol";
import { ZeroAddress, SwapCallFailed, ContractCallNotAllowed, IntegratorNotAllowed, InvalidAmount, AllSwapsFailed } from "../../Shared/ErrorsNew.sol";

contract BatchSwapFacet is IBatchSwapFacet, Swapper, RefundNative {
    function batchSwap(bytes32 _transactionId, address _integrator, address _recipient, SwapData[] calldata _data, bool[] calldata _isDirectTransfer) external payable refundExcessNative(msg.sender) {
        if (_recipient == address(0)) revert ZeroAddress();
        if (!LibFees.isIntegratorAllowed(_integrator)) revert IntegratorNotAllowed();

        uint256 length = _data.length;
        SwapInfo[] memory swapInfo = new SwapInfo[](length);

        for (uint256 i = 0; i < length; ) {
            SwapData memory swapData = _data[i];
            bool isDirectTransfer = _isDirectTransfer[i];

            if (!LibAsset.isNativeToken(swapData.from)) {
                LibAsset.permitAndTransferFromErc20(swapData.from, msg.sender, address(this), swapData.fromAmount, _data[i].permit);
            }

            (uint256 leftoverFromAmount, uint256 returnToAmount) = isDirectTransfer ? _executeSwaps(_data[i], _recipient, false) : _executeSwaps(_data[i], 0, false);

            if (leftoverFromAmount != 0 && !LibAsset.isNativeToken(swapData.from)) LibAsset.transferToken(swapData.from, msg.sender, leftoverFromAmount);
            if (!isDirectTransfer) LibAsset.transferToken(swapData.to, _recipient, returnToAmount);

            swapInfo[i] = SwapInfo(swapData.callTo, swapData.from, swapData.to, swapData.fromAmount, leftoverFromAmount, returnToAmount);
            unchecked {
                ++i;
            }
        }

        emit MultiSwapped(_transactionId, _integrator, msg.sender, _recipient, swapInfo);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (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.
 *
 * ==== 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 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) (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);
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

error OnlyContractOwner();

error NoTransferToNullAddress();
error NativeTransferFailed();
error NullAddrIsNotAValidSpender();
error NullAddrIsNotAnERC20Token();
error InvalidAmount();
error InsufficientBalance(uint256 amount, uint256 contractBalance);

error ZeroAddress();
error AlreadyInitialized();

error NotAContract();
error InvalidContract();

error CannotAuthorizeSelf();
error UnAuthorized();

error InvalidFee();
error InvalidFixedNativeFee();

error InvalidReceiver();
error InformationMismatch();
error InvalidSendingToken();
error NativeTokenNotSupported();
error InvalidDestinationChain();
error CannotBridgeToSameNetwork();

error IntegratorNotAllowed();

error ContractCallNotAllowed();
error NoSwapFromZeroBalance();
error SlippageTooLow(uint256 minAmount, uint256 returnAmount);
error SwapCallFailed(bytes reason);

error BridgeCallFailed(bytes reason);
error UnAuthorizedCallToFunction();
error TokenInformationMismatch();

error FeeTooHigh();

error NotInitialized();
error UnauthorizedCaller();

error InvalidSwapDetails();

error UnAuthorizedCall(address);
error BridgeNotAdded(address);
error InvalidLength();

error AllSwapsFailed();

error AdapterCallFailed(bytes res);
error AdapterNotWhitelisted(address adapter);
error AdapterNotAdded(address adapter);

error NativeCallFailed(bytes reason);
error Erc20CallFailed(bytes reason);
error NotNativeToken();

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.19;

import { LibAsset } from "../Libraries/LibAsset.sol";

abstract contract RefundNative {
    /// @dev Refunds any excess native asset sent to the contract after the main function
    /// @notice Refunds any excess native asset sent to the contract after the main function
    /// @param _refundee Address to send refunds to
    modifier refundExcessNative(address _refundee) {
        uint256 initialBalance = address(this).balance - msg.value;
        _;
        uint256 finalBalance = address(this).balance;

        if (finalBalance > initialBalance) LibAsset.transferToken(LibAsset._NATIVE_TOKEN, _refundee, finalBalance - initialBalance);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import { SwapData } from "../Types.sol";

import { LibAsset } from "../Libraries/LibAsset.sol";
import { LibAllowList } from "../Libraries/LibAllowList.sol";
import { LibSwap } from "../Libraries/LibSwap.sol";

import { ContractCallNotAllowed, ZeroAddress, SwapCallFailed, ZeroAddress, NoSwapFromZeroBalance, InvalidContract } from "../ErrorsNew.sol";

/// @title Swapper
/// @notice Abstract contract to provide swap functionality
abstract contract Swapper {
    /* ========= INTERNAL ========= */

    function _validateSwapData(SwapData calldata _swapData) internal view {
        if (!LibAllowList.contractIsAllowed(_swapData.callTo) || !LibAllowList.contractIsAllowed(_swapData.approveTo)) revert ContractCallNotAllowed();
        if (!LibAsset.isContract(_swapData.callTo)) revert InvalidContract();
        if (_swapData.fromAmount == 0) revert NoSwapFromZeroBalance();
    }

    function _executeSwaps(SwapData calldata _swapData, uint256 _totalTokenFees, bool _withoutRevert) internal returns (uint256 leftoverFromAmount, uint256 returnToAmount) {
        _validateSwapData(_swapData);

        (leftoverFromAmount, returnToAmount) = LibSwap.swap(_swapData, _totalTokenFees, _withoutRevert);
    }

    function _executeSwaps(SwapData calldata _swapData, address _recipient, bool _withoutRevert) internal returns (uint256 leftoverFromAmount, uint256 returnToAmount) {
        _validateSwapData(_swapData);

        (leftoverFromAmount, returnToAmount) = LibSwap.swapDirectTransfer(_swapData, _recipient, _withoutRevert);
        (_swapData, _withoutRevert, _recipient);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

interface IPermit2 {
    struct PermitDetails {
        address token;
        uint160 amount;
        uint48 expiration;
        uint48 nonce;
    }

    struct PermitSingle {
        PermitDetails details;
        address spender;
        uint256 sigDeadline;
    }

    struct TokenPermissions {
        address token;
        uint256 amount;
    }

    struct PermitTransferFrom {
        TokenPermissions permitted;
        uint256 nonce;
        uint256 deadline;
    }

    struct SignatureTransferDetails {
        address to;
        uint256 requestedAmount;
    }

    function permit(address owner, PermitSingle memory permitSingle, bytes calldata signature) external;

    function transferFrom(address from, address to, uint160 amount, address token) external;

    function permitTransferFrom(PermitTransferFrom memory permit, SignatureTransferDetails calldata transferDetails, address owner, bytes calldata signature) external;
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.19;

/// @title Contains 512-bit math functions
/// @notice Facilitates multiplication and division that can have overflow of an intermediate value without any loss of precision
/// @dev Handles "phantom overflow" i.e., allows multiplication and division where an intermediate value overflows 256 bits
/// https://github.com/Cryptorubic/multi-proxy-rubic/blob/master/src/Libraries/FullMath.sol
library FullMath {
    /// @notice Calculates floor(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
    /// @param a The multiplicand
    /// @param b The multiplier
    /// @param denominator The divisor
    /// @return result The 256-bit result
    /// @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv
    function mulDiv(uint256 a, uint256 b, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = a * b
            // Compute the product mod 2**256 and mod 2**256 - 1
            // then use the Chinese Remainder Theorem to reconstruct
            // the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2**256 + prod0
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(a, b, not(0))
                prod0 := mul(a, b)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division
            if (prod1 == 0) {
                require(denominator != 0);
                assembly {
                    result := div(prod0, denominator)
                }
                return result;
            }

            // Make sure the result is less than 2**256.
            // Also prevents denominator == 0
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0]
            // Compute remainder using mulmod
            uint256 remainder;
            assembly {
                remainder := mulmod(a, b, denominator)
            }
            // Subtract 256 bit number from 512 bit number
            assembly {
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator
            // Compute largest power of two divisor of denominator.
            // Always >= 1.
            uint256 twos = (0 - denominator) & denominator;
            // Divide denominator by power of two
            assembly {
                denominator := div(denominator, twos)
            }

            // Divide [prod1 prod0] by the factors of two
            assembly {
                prod0 := div(prod0, twos)
            }
            // Shift in bits from prod1 into prod0. For this we need
            // to flip `twos` such that it is 2**256 / twos.
            // If twos is zero, then it becomes one
            assembly {
                twos := add(div(sub(0, twos), twos), 1)
            }
            prod0 |= prod1 * twos;

            // Invert denominator mod 2**256
            // Now that denominator is an odd number, it has an inverse
            // modulo 2**256 such that denominator * inv = 1 mod 2**256.
            // Compute the inverse by starting with a seed that is correct
            // correct for four bits. That is, denominator * inv = 1 mod 2**4
            uint256 inv = (3 * denominator) ^ 2;
            // Now use Newton-Raphson iteration to improve the precision.
            // Thanks to Hensel's lifting lemma, this also works in modular
            // arithmetic, doubling the correct bits in each step.
            inv *= 2 - denominator * inv; // inverse mod 2**8
            inv *= 2 - denominator * inv; // inverse mod 2**16
            inv *= 2 - denominator * inv; // inverse mod 2**32
            inv *= 2 - denominator * inv; // inverse mod 2**64
            inv *= 2 - denominator * inv; // inverse mod 2**128
            inv *= 2 - denominator * inv; // inverse mod 2**256

            // Because the division is now exact we can divide by multiplying
            // with the modular inverse of denominator. This will give us the
            // correct result modulo 2**256. Since the precoditions guarantee
            // that the outcome is less than 2**256, this is the final result.
            // We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inv;
            return result;
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import { InvalidContract } from "../ErrorsNew.sol";
import { AllowList } from "../Types.sol";

struct AllowListStorage {
    mapping(address => AllowList) allowlist;
}

/// @title Lib Allow List
/// @notice Library for managing and accessing the conract address allow list
library LibAllowList {
    bytes32 internal constant NAMESPACE = keccak256("dzap.library.allow.list");

    /// @dev Adds a contract address to the allow list
    /// @param _contract the contract address to add
    function addAllowedContract(address _contract) internal {
        _checkAddress(_contract);

        AllowListStorage storage als = _getStorage();

        if (als.allowlist[_contract].isAllowed) return;

        als.allowlist[_contract].isAllowed = true;
    }

    /// @dev Remove a contract address from the allow list
    /// @param _contract the contract address to remove
    function removeAllowedContract(address _contract) internal {
        AllowListStorage storage als = _getStorage();

        if (!als.allowlist[_contract].isAllowed) {
            return;
        }

        als.allowlist[_contract].isAllowed = false;
    }

    /// @dev Add a selector to the allow list
    /// @param _selector the selector to add
    function addAllowedSelector(address _contract, bytes4 _selector) internal {
        _checkAddress(_contract);

        _getStorage().allowlist[_contract].selectorAllowList[_selector] = true;
    }

    /// @dev Removes a selector from the allow list
    /// @param _selector the selector to remove
    function removeAllowedSelector(address _contract, bytes4 _selector) internal {
        _getStorage().allowlist[_contract].selectorAllowList[_selector] = false;
    }

    /// @dev Checks whether a contract address has been added to the allow list
    /// @param _contract the contract address to check
    function contractIsAllowed(address _contract) internal view returns (bool) {
        return _getStorage().allowlist[_contract].isAllowed;
    }

    /// @dev Returns if selector has been added to the allow list
    /// @param _selector the selector to check
    function selectorIsAllowed(address _contract, bytes4 _selector) internal view returns (bool) {
        return _getStorage().allowlist[_contract].selectorAllowList[_selector];
    }

    /// @dev Fetch local storage struct
    function _getStorage() internal pure returns (AllowListStorage storage als) {
        bytes32 position = NAMESPACE;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            als.slot := position
        }
    }

    /// @dev Contains business logic for validating a contract address.
    /// @param _contract address of the dex to check
    function _checkAddress(address _contract) private view {
        if (_contract == address(0) || _contract.code.length == 0) revert InvalidContract();
    }
}

pragma solidity 0.8.19;

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import { LibFees } from "../Libraries/LibFees.sol";
import { LibPermit } from "../Libraries/LibPermit.sol";

import { FeeType, SwapData, PermitType, FeeInfo } from "../Types.sol";
import { NoTransferToNullAddress, InsufficientBalance, NativeTransferFailed, NullAddrIsNotAValidSpender, NullAddrIsNotAnERC20Token, InvalidAmount, IntegratorNotAllowed } from "../ErrorsNew.sol";

/// @title LibAsset
/// @notice This library contains helpers for dealing with onchain transfers
///         of assets, including accounting for the native asset `assetId`
///         conventions and any noncompliant ERC20 transfers
library LibAsset {
    address internal constant _NATIVE_TOKEN = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    /// @notice Gets the balance of the inheriting contract for the given asset
    function getOwnBalance(address _token) internal view returns (uint256) {
        return _token == _NATIVE_TOKEN ? address(this).balance : IERC20(_token).balanceOf(address(this));
    }

    function getBalance(address _token, address _recipient) internal view returns (uint256) {
        return _token == _NATIVE_TOKEN ? _recipient.balance : IERC20(_token).balanceOf(_recipient);
    }

    /// @notice If the current allowance is insufficient, the allowance for a given spender
    function approveERC20(address _token, address _spender, uint256 _amount) internal {
        if (_spender == address(0)) revert NullAddrIsNotAValidSpender();

        uint256 allowance = IERC20(_token).allowance(address(this), _spender);

        if (allowance < _amount) SafeERC20.safeIncreaseAllowance(IERC20(_token), _spender, _amount - allowance);
    }

    /// @notice Transfers ether from the inheriting contract to a given recipient
    function transferNativeToken(address _recipient, uint256 _amount) internal {
        if (_recipient == address(0)) revert NoTransferToNullAddress();
        if (_amount > address(this).balance) revert InsufficientBalance(_amount, address(this).balance);
        (bool success, ) = _recipient.call{ value: _amount }("");
        if (!success) revert NativeTransferFailed();
    }

    /// @notice Transfers tokens from the inheriting contract to a given recipient
    function transferERC20(address _token, address _recipient, uint256 _amount) internal {
        if (isNativeToken(_token)) revert NullAddrIsNotAnERC20Token();

        uint256 assetBalance = IERC20(_token).balanceOf(address(this));
        if (_amount > assetBalance) revert InsufficientBalance(_amount, assetBalance);
        SafeERC20.safeTransfer(IERC20(_token), _recipient, _amount);
    }

    /// @notice Transfers tokens from a sender to a given recipient
    function transferFromERC20(address _token, address _from, address _to, uint256 _amount) internal {
        IERC20 token = IERC20(_token);

        uint256 prevBalance = token.balanceOf(_to);
        SafeERC20.safeTransferFrom(token, _from, _to, _amount);
        if (token.balanceOf(_to) - prevBalance != _amount) {
            revert InvalidAmount();
        }
    }

    /// @notice Wrapper function to transfer a given asset (native or erc20) to
    ///         some recipient. Should handle all non-compliant return value
    ///         tokens as well by using the SafeERC20 contract by open zeppelin.
    function transferToken(address _token, address _recipient, uint256 _amount) internal {
        if (_amount != 0) {
            if (_token == _NATIVE_TOKEN) transferNativeToken(_recipient, _amount);
            else transferERC20(_token, _recipient, _amount);
        }
    }

    /// @dev Use permit2 to approve token
    function permitAndTransferFromErc20(address _token, address _from, address _to, uint256 _amount, bytes calldata permit_) internal {
        (PermitType permitType, bytes memory data) = abi.decode(permit_, (PermitType, bytes));

        if (permitType == PermitType.PERMIT2_APPROVE) {
            LibPermit.permit2ApproveAndTransfer(_from, _to, uint160(_amount), _token, data);
        } else if (permitType == PermitType.PERMIT) {
            if (data.length != 0) LibPermit.permit(_token, data);
            transferFromERC20(_token, _from, _to, _amount);
        } else {
            LibPermit.permit2TransferFrom(_token, data, _amount);
        }
    }

    function deposit(FeeInfo memory feeInfo, address _token, uint256 _amount, bytes calldata _permit) internal returns (uint256 totalFee, uint256 dZapShare) {
        if (!LibAsset.isNativeToken(_token)) {
            permitAndTransferFromErc20(_token, msg.sender, address(this), _amount, _permit);
        }

        (totalFee, dZapShare) = LibFees.calculateTokenFees(_amount, feeInfo);
    }

    function deposit(FeeInfo memory feeInfo, SwapData calldata _swap) internal returns (uint256 totalFee, uint256 dZapShare) {
        if (!LibAsset.isNativeToken(_swap.from)) {
            permitAndTransferFromErc20(_swap.from, msg.sender, address(this), _swap.fromAmount, _swap.permit);
        }

        (totalFee, dZapShare) = LibFees.calculateTokenFees(_swap.fromAmount, feeInfo);
    }

    // @notice Determines whether the given token is the native token
    function isNativeToken(address _token) internal pure returns (bool) {
        return _token == _NATIVE_TOKEN;
    }

    /// @dev Checks whether the given address is a contract and contains code
    function isContract(address _contractAddr) internal view returns (bool) {
        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            size := extcodesize(_contractAddr)
        }
        return size != 0;
    }

    /* ========= INTERNAL ========= */
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import { FullMath } from "../Libraries/FullMath.sol";
import { LibAsset } from "../Libraries/LibAsset.sol";
import { IntegratorInfo, FeeType, FeeInfo } from "../Types.sol";
import { IntegratorNotAllowed } from "../ErrorsNew.sol";

struct FeesStorage {
    mapping(address => IntegratorInfo) integratorInfo;
    uint256 maxTokenFee;
    uint256 maxFixedNativeFeeAmount;
    address protocolFeeVault;
    bool initialized;
}

/// @title LibFees
/// @notice This library contains helpers for calculating and transferring fees
library LibFees {
    bytes32 internal constant _FEE_STORAGE_SLOT = keccak256("dzap.storage.library.fees");
    uint256 internal constant _BPS_DENOMINATOR = 1e6; // 4 basis points

    event TokenFee(bytes32 indexed transactionId, address indexed integrator, FeeType feeType, address token, uint256 dzapFee, uint256 integratorFee);

    event FixedNativeFee(bytes32 indexed transactionId, address indexed integrator, FeeType feeType, uint256 dzapFee, uint256 integratorFee);

    function feesStorage() internal pure returns (FeesStorage storage ds) {
        bytes32 slot = _FEE_STORAGE_SLOT;
        assembly {
            ds.slot := slot
        }
    }

    function accrueFixedNativeFees(address _integrator, FeeType _feeType) internal {
        FeesStorage storage fs = feesStorage();
        FeeInfo memory feeInfo = fs.integratorInfo[_integrator].feeInfo[_feeType];
        uint256 fixedNativeFeeAmount = feeInfo.fixedNativeFeeAmount;

        if (fixedNativeFeeAmount != 0) {
            uint256 dzapShare = (fixedNativeFeeAmount * feeInfo.dzapFixedNativeShare) / _BPS_DENOMINATOR;
            if (fixedNativeFeeAmount > dzapShare) LibAsset.transferNativeToken(_integrator, fixedNativeFeeAmount - dzapShare);
            if (dzapShare != 0) LibAsset.transferNativeToken(fs.protocolFeeVault, dzapShare);
        }
    }

    function accrueTokenFees(address _integrator, address _token, uint256 _integratorFee, uint256 _dZapFee) internal {
        if (_integratorFee != 0) LibAsset.transferToken(_token, _integrator, _integratorFee);
        if (_dZapFee != 0) LibAsset.transferToken(_token, feesStorage().protocolFeeVault, _dZapFee);
    }

    function calcFixedNativeFees(FeeType _feeType, address _integrator) internal view returns (uint256 fixedNativeFeeAmount, uint256 dzapShare) {
        FeeInfo memory feeInfo = feesStorage().integratorInfo[_integrator].feeInfo[_feeType];

        fixedNativeFeeAmount = feeInfo.fixedNativeFeeAmount;
        if (fixedNativeFeeAmount != 0) dzapShare = (fixedNativeFeeAmount * feeInfo.dzapFixedNativeShare) / _BPS_DENOMINATOR;
    }

    function calculateTokenFees(uint256 _amountWithFee, FeeInfo memory _feeInfo) internal pure returns (uint256 totalFee, uint256 dZapShare) {
        if (_feeInfo.tokenFee != 0) {
            totalFee = FullMath.mulDiv(_amountWithFee, _feeInfo.tokenFee, _BPS_DENOMINATOR);

            dZapShare = FullMath.mulDiv(totalFee, _feeInfo.dzapTokenShare, _BPS_DENOMINATOR);
        }
    }

    function getIntegratorFeeInfo(address _integrator, FeeType _feeType) internal view returns (FeeInfo memory feeInfo) {
        if (!LibFees.isIntegratorAllowed(_integrator)) revert IntegratorNotAllowed();

        return feesStorage().integratorInfo[_integrator].feeInfo[_feeType];
    }

    function isIntegratorAllowed(address _integrator) internal view returns (bool) {
        FeesStorage storage fs = feesStorage();
        return fs.integratorInfo[_integrator].status;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.19;

import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol";
import "../Interfaces/IPermit2.sol";

struct PermitStorage {
    address permit2;
    bool initialized;
}

/// @title LibPermit
/// @notice This library contains helpers for using permit and permit2
library LibPermit {
    error InvalidPermitData();
    error InvalidPermit();

    bytes32 internal constant _PERMIT_STORAGE_SLOT = keccak256("dzap.storage.library.permit");

    function permitStorage() internal pure returns (PermitStorage storage ps) {
        bytes32 slot = _PERMIT_STORAGE_SLOT;
        assembly {
            ps.slot := slot
        }
    }

    function permit2() internal view returns (address) {
        return permitStorage().permit2;
    }

    function permit2ApproveAndTransfer(address _from, address _to, uint160 _amount, address _token, bytes memory data) internal {
        permit2Approve(_token, data);
        IPermit2(permit2()).transferFrom(_from, _to, uint160(_amount), _token);
    }

    function permit2Approve(address _token, bytes memory _data) internal {
        IPermit2 _permit2 = IPermit2(permit2());
        if (_data.length != 0) {
            (uint160 allowanceAmount, uint48 nonce, uint48 expiration, uint256 sigDeadline, bytes memory signature) = abi.decode(_data, (uint160, uint48, uint48, uint256, bytes));
            _permit2.permit(msg.sender, IPermit2.PermitSingle(IPermit2.PermitDetails(_token, allowanceAmount, expiration, nonce), address(this), sigDeadline), signature);
        }
    }

    function permit2TransferFrom(address _token, bytes memory _data, uint256 amount_) internal {
        (uint256 nonce, uint256 deadline, bytes memory signature) = abi.decode(_data, (uint256, uint256, bytes));
        IPermit2(permit2()).permitTransferFrom(IPermit2.PermitTransferFrom(IPermit2.TokenPermissions(_token, amount_), nonce, deadline), IPermit2.SignatureTransferDetails(address(this), amount_), msg.sender, signature);
    }

    function permit(address _token, bytes memory _data) internal {
        if (_data.length == 32 * 7) {
            (bool success, ) = _token.call(abi.encodePacked(IERC20Permit.permit.selector, _data));
            if (!success) revert InvalidPermit();
        } else revert InvalidPermitData();
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import { LibAsset } from "../Libraries/LibAsset.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

import { SwapData } from "../Types.sol";

import { SwapCallFailed, SlippageTooLow } from "../ErrorsNew.sol";

/// @title LibSwap
/// @notice This library contains helpers for doing swap
library LibSwap {
    function swap(SwapData calldata _swapData, uint256 _totalTokenFees, bool _withoutRevert) internal returns (uint256 leftoverFromAmount, uint256 returnToAmount) {
        uint256 fromAmount = _swapData.fromAmount - _totalTokenFees;
        uint256 initialFromBalance = LibAsset.getOwnBalance(_swapData.from) - fromAmount;
        uint256 initialToBalance = LibAsset.getOwnBalance(_swapData.to);
        uint256 nativeValue;

        if (LibAsset.isNativeToken(_swapData.from)) {
            nativeValue = fromAmount;
        } else {
            LibAsset.approveERC20(_swapData.from, _swapData.approveTo, fromAmount);
        }

        (bool success, bytes memory res) = _swapData.callTo.call{ value: nativeValue }(_swapData.swapCallData);

        if (!success) {
            if (_withoutRevert) {
                return (0, 0);
            }
            revert SwapCallFailed(res);
        }

        returnToAmount = LibAsset.getOwnBalance(_swapData.to) - initialToBalance;
        if (returnToAmount < _swapData.minToAmount) revert SlippageTooLow(_swapData.minToAmount, returnToAmount);

        uint256 finalFromBalance = LibAsset.getOwnBalance(_swapData.from);
        if (finalFromBalance > initialFromBalance) {
            leftoverFromAmount = finalFromBalance - initialFromBalance;
        }
    }

    function swapDirectTransfer(SwapData calldata _swapData, address _recipient, bool _withoutRevert) internal returns (uint256 leftoverFromAmount, uint256 returnToAmount) {
        uint256 initialFromBalance = LibAsset.getOwnBalance(_swapData.from) - _swapData.fromAmount;
        uint256 initialToBalance = LibAsset.getBalance(_swapData.to, _recipient);
        uint256 nativeValue;

        if (LibAsset.isNativeToken(_swapData.from)) {
            nativeValue = _swapData.fromAmount;
        } else {
            LibAsset.approveERC20(_swapData.from, _swapData.approveTo, _swapData.fromAmount);
        }

        (bool success, bytes memory res) = _swapData.callTo.call{ value: nativeValue }(_swapData.swapCallData);

        if (!success) {
            if (_withoutRevert) {
                return (0, 0);
            }
            revert SwapCallFailed(res);
        }

        returnToAmount = LibAsset.getBalance(_swapData.to, _recipient) - initialToBalance;
        if (returnToAmount < _swapData.minToAmount) {
            revert SlippageTooLow(_swapData.minToAmount, returnToAmount);
        }

        uint256 finalFromBalance = LibAsset.getOwnBalance(_swapData.from);
        if (finalFromBalance > initialFromBalance) {
            leftoverFromAmount = finalFromBalance - initialFromBalance;
        }
    }

    function swapErc20ToErc20(SwapData calldata _swapData, address _recipient) internal returns (uint256 leftoverFromAmount, uint256 returnToAmount) {
        uint256 initialFromBalance = IERC20(_swapData.from).balanceOf(address(this)) - _swapData.fromAmount;
        uint256 initialToBalance = IERC20(_swapData.to).balanceOf(_recipient);

        LibAsset.approveERC20(_swapData.from, _swapData.approveTo, _swapData.fromAmount);

        (bool success, bytes memory res) = _swapData.callTo.call(_swapData.swapCallData);

        if (!success) revert SwapCallFailed(res);

        returnToAmount = IERC20(_swapData.to).balanceOf(_recipient) - initialToBalance;
        if (returnToAmount < _swapData.minToAmount) {
            revert SlippageTooLow(_swapData.minToAmount, returnToAmount);
        }

        uint256 finalFromBalance = LibAsset.getOwnBalance(_swapData.from);
        if (finalFromBalance > initialFromBalance) {
            leftoverFromAmount = finalFromBalance - initialFromBalance;
        }
    }

    function swapErc20ToNative(SwapData calldata _swapData, address _recipient) internal returns (uint256 leftoverFromAmount, uint256 returnToAmount) {
        uint256 initialFromBalance = IERC20(_swapData.from).balanceOf(address(this)) - _swapData.fromAmount;
        uint256 initialToBalance = _recipient.balance;

        LibAsset.approveERC20(_swapData.from, _swapData.approveTo, _swapData.fromAmount);

        (bool success, bytes memory res) = _swapData.callTo.call(_swapData.swapCallData);

        if (!success) revert SwapCallFailed(res);

        returnToAmount = _recipient.balance - initialToBalance;
        if (returnToAmount < _swapData.minToAmount) {
            revert SlippageTooLow(_swapData.minToAmount, returnToAmount);
        }

        uint256 finalFromBalance = LibAsset.getOwnBalance(_swapData.from);
        if (finalFromBalance > initialFromBalance) {
            leftoverFromAmount = finalFromBalance - initialFromBalance;
        }
    }

    function swapNativeToErc20(SwapData calldata _swapData, address _recipient) internal returns (uint256 leftoverFromAmount, uint256 returnToAmount) {
        uint256 initialFromBalance = address(this).balance - _swapData.fromAmount;
        uint256 initialToBalance = IERC20(_swapData.to).balanceOf(_recipient);

        (bool success, bytes memory res) = _swapData.callTo.call{ value: _swapData.fromAmount }(_swapData.swapCallData);

        if (!success) revert SwapCallFailed(res);

        returnToAmount = IERC20(_swapData.to).balanceOf(_recipient) - initialToBalance;
        if (returnToAmount < _swapData.minToAmount) {
            revert SlippageTooLow(_swapData.minToAmount, returnToAmount);
        }

        uint256 finalFromBalance = address(this).balance;
        if (finalFromBalance > initialFromBalance) {
            leftoverFromAmount = finalFromBalance - initialFromBalance;
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

enum FeeType {
    BRIDGE,
    SWAP
}

enum PermitType {
    PERMIT,
    PERMIT2_TRANSFER_FROM,
    PERMIT2_APPROVE
}

struct AllowList {
    bool isAllowed;
    mapping(bytes4 => bool) selectorAllowList;
}

struct FeeInfo {
    uint256 tokenFee; // ex 1%
    uint256 fixedNativeFeeAmount; // ex 0.5 Matic
    uint256 dzapTokenShare; // 50%, 50% of the total 1% fee
    uint256 dzapFixedNativeShare; // 50%, 50% of the total fixedFeeAmount fee
}

struct IntegratorInfo {
    bool status;
    mapping(FeeType => FeeInfo) feeInfo;
}

struct SwapData {
    address callTo; // router, dex, aggregator
    address approveTo;
    address from;
    address to;
    uint256 fromAmount; // totalAmountWithFee
    uint256 minToAmount; // fro amountWithoutFee
    bytes swapCallData; // from : amountWithoutFee
    bytes permit;
}

struct SwapInfo {
    address dex;
    address fromToken;
    address toToken;
    uint256 fromAmount;
    uint256 leftOverFromAmount;
    uint256 returnToAmount;
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.19;

import { SwapData, SwapInfo } from "../../Shared/Types.sol";

interface IBatchSwapFacet {
    /* ========= EVENTS ========= */

    event MultiSwapped(bytes32 indexed transactionId, address indexed integrator, address indexed sender, address recipient, SwapInfo[] swapInfo);

    /* ========= EXTERNAL ========= */

    function batchSwap(bytes32 _transactionId, address _integrator, address _recipient, SwapData[] calldata _data, bool[] calldata _isDirectTransfer) external payable;
}

{
  "optimizer": {
    "enabled": true,
    "runs": 300
  },
  "viaIR": true,
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"name":"ContractCallNotAllowed","type":"error"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"contractBalance","type":"uint256"}],"name":"InsufficientBalance","type":"error"},{"inputs":[],"name":"IntegratorNotAllowed","type":"error"},{"inputs":[],"name":"InvalidAmount","type":"error"},{"inputs":[],"name":"InvalidContract","type":"error"},{"inputs":[],"name":"InvalidPermit","type":"error"},{"inputs":[],"name":"InvalidPermitData","type":"error"},{"inputs":[],"name":"NativeTransferFailed","type":"error"},{"inputs":[],"name":"NoSwapFromZeroBalance","type":"error"},{"inputs":[],"name":"NoTransferToNullAddress","type":"error"},{"inputs":[],"name":"NullAddrIsNotAValidSpender","type":"error"},{"inputs":[],"name":"NullAddrIsNotAnERC20Token","type":"error"},{"inputs":[{"internalType":"uint256","name":"minAmount","type":"uint256"},{"internalType":"uint256","name":"returnAmount","type":"uint256"}],"name":"SlippageTooLow","type":"error"},{"inputs":[{"internalType":"bytes","name":"reason","type":"bytes"}],"name":"SwapCallFailed","type":"error"},{"inputs":[],"name":"ZeroAddress","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"transactionId","type":"bytes32"},{"indexed":true,"internalType":"address","name":"integrator","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"address","name":"recipient","type":"address"},{"components":[{"internalType":"address","name":"dex","type":"address"},{"internalType":"address","name":"fromToken","type":"address"},{"internalType":"address","name":"toToken","type":"address"},{"internalType":"uint256","name":"fromAmount","type":"uint256"},{"internalType":"uint256","name":"leftOverFromAmount","type":"uint256"},{"internalType":"uint256","name":"returnToAmount","type":"uint256"}],"indexed":false,"internalType":"struct SwapInfo[]","name":"swapInfo","type":"tuple[]"}],"name":"MultiSwapped","type":"event"},{"inputs":[{"internalType":"bytes32","name":"_transactionId","type":"bytes32"},{"internalType":"address","name":"_integrator","type":"address"},{"internalType":"address","name":"_recipient","type":"address"},{"components":[{"internalType":"address","name":"callTo","type":"address"},{"internalType":"address","name":"approveTo","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"fromAmount","type":"uint256"},{"internalType":"uint256","name":"minToAmount","type":"uint256"},{"internalType":"bytes","name":"swapCallData","type":"bytes"},{"internalType":"bytes","name":"permit","type":"bytes"}],"internalType":"struct SwapData[]","name":"_data","type":"tuple[]"},{"internalType":"bool[]","name":"_isDirectTransfer","type":"bool[]"}],"name":"batchSwap","outputs":[],"stateMutability":"payable","type":"function"}]

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