// File: original_contracts/routers/IRouter.sol

pragma solidity 0.7.5;

interface IRouter {

    /**
    * @dev Certain routers/exchanges needs to be initialized.
    * This method will be called from Augustus
    */
    function initialize(bytes calldata data) external;

    /**
    * @dev Returns unique identifier for the router
    */
    function getKey() external pure returns(bytes32);

    event Swapped2(
        bytes16 uuid,
        address partner,
        uint256 feePercent,
        address initiator,
        address indexed beneficiary,
        address indexed srcToken,
        address indexed destToken,
        uint256 srcAmount,
        uint256 receivedAmount,
        uint256 expectedAmount
    );

    event Bought2(
        bytes16 uuid,
        address partner,
        uint256 feePercent,
        address initiator,
        address indexed beneficiary,
        address indexed srcToken,
        address indexed destToken,
        uint256 srcAmount,
        uint256 receivedAmount
    );
}

// File: original_contracts/IAugustusSwapperV5.sol

pragma solidity 0.7.5;

interface IAugustusSwapperV5 {
    function hasRole(bytes32 role, address account) external view returns (bool);
}

// File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol



pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @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);
}

// File: openzeppelin-solidity/contracts/math/SafeMath.sol



pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: openzeppelin-solidity/contracts/utils/Address.sol



pragma solidity >=0.6.2 <0.8.0;

/**
 * @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
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 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://diligence.consensys.net/posts/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/v0.5.11/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");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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 functionCall(target, data, "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");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(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) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // 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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: openzeppelin-solidity/contracts/token/ERC20/SafeERC20.sol



pragma solidity >=0.6.0 <0.8.0;




/**
 * @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 SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    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'
        // solhint-disable-next-line max-line-length
        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));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @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");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// File: original_contracts/ITokenTransferProxy.sol

pragma solidity 0.7.5;


interface ITokenTransferProxy {

    function transferFrom(
        address token,
        address from,
        address to,
        uint256 amount
    )
        external;
}

// File: original_contracts/lib/Utils.sol

pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;





interface IERC20Permit {
    function permit(address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;
}

interface IERC20PermitLegacy {
    function permit(address holder, address spender, uint256 nonce, uint256 expiry, bool allowed, uint8 v, bytes32 r, bytes32 s) external;
}

library Utils {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    address constant ETH_ADDRESS = address(
        0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE
    );
    
    uint256 constant MAX_UINT = type(uint256).max;

    /**
   * @param fromToken Address of the source token
   * @param fromAmount Amount of source tokens to be swapped
   * @param toAmount Minimum destination token amount expected out of this swap
   * @param expectedAmount Expected amount of destination tokens without slippage
   * @param beneficiary Beneficiary address
   * 0 then 100% will be transferred to beneficiary. Pass 10000 for 100%
   * @param path Route to be taken for this swap to take place

   */
    struct SellData {
        address fromToken;
        uint256 fromAmount;
        uint256 toAmount;
        uint256 expectedAmount;
        address payable beneficiary;
        Utils.Path[] path;
        address payable partner;
        uint256 feePercent;
        bytes permit;
        uint256 deadline;
        bytes16 uuid;
    }

    struct BuyData {
        address adapter;
        address fromToken;
        address toToken;
        uint256 fromAmount;
        uint256 toAmount;
        address payable beneficiary;
        Utils.Route[] route;
        address payable partner;
        uint256 feePercent;
        bytes permit;
        uint256 deadline;
        bytes16 uuid;
    }

    struct MegaSwapSellData {
        address fromToken;
        uint256 fromAmount;
        uint256 toAmount;
        uint256 expectedAmount;
        address payable beneficiary;
        Utils.MegaSwapPath[] path;
        address payable partner;
        uint256 feePercent;
        bytes permit;
        uint256 deadline;
        bytes16 uuid;
    }

    struct SimpleData {
        address fromToken;
        address toToken;
        uint256 fromAmount;
        uint256 toAmount;
        uint256 expectedAmount;
        address[] callees;
        bytes exchangeData;
        uint256[] startIndexes;
        uint256[] values;
        address payable beneficiary;
        address payable partner;
        uint256 feePercent;
        bytes permit;
        uint256 deadline;
        bytes16 uuid;
    }

    struct Adapter {
        address payable adapter;
        uint256 percent;
        uint256 networkFee;//NOT USED
        Route[] route;
    }

    struct Route {
        uint256 index;//Adapter at which index needs to be used
        address targetExchange;
        uint percent;
        bytes payload;
        uint256 networkFee;//NOT USED - Network fee is associated with 0xv3 trades
    }

    struct MegaSwapPath {
        uint256 fromAmountPercent;
        Path[] path;
    }

    struct Path {
        address to;
        uint256 totalNetworkFee;//NOT USED - Network fee is associated with 0xv3 trades
        Adapter[] adapters;
    }

    function ethAddress() internal pure returns (address) {return ETH_ADDRESS;}

    function maxUint() internal pure returns (uint256) {return MAX_UINT;}

    function approve(
        address addressToApprove,
        address token,
        uint256 amount
    ) internal {
        if (token != ETH_ADDRESS) {
            IERC20 _token = IERC20(token);

            uint allowance = _token.allowance(address(this), addressToApprove);

            if (allowance < amount) {
                _token.safeApprove(addressToApprove, 0);
                _token.safeIncreaseAllowance(addressToApprove, MAX_UINT);
            }
        }
    }

    function transferTokens(
        address token,
        address payable destination,
        uint256 amount
    )
    internal
    {
        if (amount > 0) {
            if (token == ETH_ADDRESS) {
                (bool result, ) = destination.call{value: amount, gas: 10000}("");
                require(result, "Failed to transfer Ether");
            }
            else {
                IERC20(token).safeTransfer(destination, amount);
            }
        }

    }

    function tokenBalance(
        address token,
        address account
    )
    internal
    view
    returns (uint256)
    {
        if (token == ETH_ADDRESS) {
            return account.balance;
        } else {
            return IERC20(token).balanceOf(account);
        }
    }

    function permit(
        address token,
        bytes memory permit
    )
        internal
    {
        if (permit.length == 32 * 7) {
            (bool success,) = token.call(abi.encodePacked(IERC20Permit.permit.selector, permit));
            require(success, "Permit failed");
        }

        if (permit.length == 32 * 8) {
            (bool success,) = token.call(abi.encodePacked(IERC20PermitLegacy.permit.selector, permit));
            require(success, "Permit failed");
        }
    }

}

// File: original_contracts/adapters/IAdapter.sol

pragma solidity 0.7.5;



interface IAdapter {

    /**
    * @dev Certain adapters needs to be initialized.
    * This method will be called from Augustus
    */
    function initialize(bytes calldata data) external;

   /**
   * @dev The function which performs the swap on an exchange.
   * @param fromToken Address of the source token
   * @param toToken Address of the destination token
   * @param fromAmount Amount of source tokens to be swapped
   * @param networkFee NOT USED - Network fee to be used in this router
   * @param route Route to be followed
   */
    function swap(
        IERC20 fromToken,
        IERC20 toToken,
        uint256 fromAmount,
        uint256 networkFee,
        Utils.Route[] calldata route
    )
        external
        payable;
}

// File: original_contracts/AugustusStorage.sol

pragma solidity 0.7.5;


contract AugustusStorage {

    struct FeeStructure {
        uint256 partnerShare;
        bool noPositiveSlippage;
        bool positiveSlippageToUser;
        uint16 feePercent;
        string partnerId;
        bytes data;
    }

    ITokenTransferProxy internal tokenTransferProxy;
    address payable internal feeWallet;
    
    mapping(address => FeeStructure) internal registeredPartners;

    mapping (bytes4 => address) internal selectorVsRouter;
    mapping (bytes32 => bool) internal adapterInitialized;
    mapping (bytes32 => bytes) internal adapterVsData;

    mapping (bytes32 => bytes) internal routerData;
    mapping (bytes32 => bool) internal routerInitialized;


    bytes32 public constant WHITELISTED_ROLE = keccak256("WHITELISTED_ROLE");

    bytes32 public constant ROUTER_ROLE = keccak256("ROUTER_ROLE");

}

// File: original_contracts/fee/FeeModel.sol

pragma solidity 0.7.5;





contract FeeModel is AugustusStorage {
    using SafeMath for uint256;

    uint256 public immutable partnerSharePercent;
    uint256 public immutable maxFeePercent;

    constructor(
        uint256 _partnerSharePercent,
        uint256 _maxFeePercent
    )
        public
    {
        partnerSharePercent = _partnerSharePercent;
        maxFeePercent = _maxFeePercent;
    }

    // feePercent is a packed structure.
    // Bits 255-248 = 8-bit version field
    //
    // Version 0
    // =========
    // Entire structure is interpreted as the fee percent in basis points.
    // If set to 0 then partner will not receive any fees.
    //
    // Version 1
    // =========
    // Bits 13-0 = Fee percent in basis points
    // Bit 14 = positiveSlippageToUser (positive slippage to partner if not set)
    function takeFeeAndTransferTokens(
        address toToken,
        uint256 expectedAmount,
        uint256 receivedAmount,
        address payable beneficiary,
        address payable partner,
        uint256 feePercent

    )
        internal
    {
        uint256 fee = 0;

        if ( feePercent != 0 && partner != address(0) ) {
            uint256 version = feePercent >> 248;
            if (version == 0) {
                fee = _takeFee(
                    feePercent > maxFeePercent ? maxFeePercent : feePercent,
                    toToken,
                    receivedAmount,
                    expectedAmount,
                    partnerSharePercent,
                    true, //positiveSlippageToUser
                    partner
                );
            } else if (version == 1) {
                uint256 feeBps = feePercent & 0x3FFF;
                fee = _takeFee(
                    feeBps > maxFeePercent ? maxFeePercent : feeBps,
                    toToken,
                    receivedAmount,
                    expectedAmount,
                    partnerSharePercent,
                    (feePercent & (1 << 14)) != 0, //positiveSlippageToUser
                    partner
                );
            }
        }

        uint256 remainingAmount = receivedAmount;

        //If there is a positive slippage and no partner fee
        //then 50% goes to paraswap and 50% to the user
        if (fee == 0) {
            if (remainingAmount > expectedAmount) {
                uint256 positiveSlippageShare =
                    remainingAmount.sub(expectedAmount).div(2);
                remainingAmount = remainingAmount.sub(positiveSlippageShare);
                Utils.transferTokens(toToken, feeWallet, positiveSlippageShare);
            }
        } else {
            remainingAmount = remainingAmount.sub(fee);
        }

        Utils.transferTokens(toToken, beneficiary, remainingAmount);
    }

    function _takeFee(
        uint256 feePercent,
        address toToken,
        uint256 receivedAmount,
        uint256 expectedAmount,
        uint256 partnerSharePercent,
        bool positiveSlippageToUser,
        address payable partner
    )
        private
        returns(uint256 fee)
    {
        uint256 partnerShare = 0;
        uint256 paraswapShare = 0;

        bool takeSlippage = feePercent <= 50 && receivedAmount > expectedAmount;

        if (feePercent > 0) {
            //Calculate total fee to be taken
            fee = (takeSlippage ? expectedAmount : receivedAmount)
                .mul(feePercent).div(10000);
            //Calculate partner's share
            partnerShare = fee.mul(partnerSharePercent).div(10000);
            //All remaining fee is paraswap's share
            paraswapShare = fee.sub(partnerShare);
        }

        if (takeSlippage) {
            uint256 halfPositiveSlippage =
                receivedAmount.sub(expectedAmount).div(2);
            paraswapShare = paraswapShare.add(halfPositiveSlippage);
            fee = fee.add(halfPositiveSlippage);

            if (!positiveSlippageToUser) {
                partnerShare = partnerShare.add(halfPositiveSlippage);
                fee = fee.add(halfPositiveSlippage);
            }
        }

        Utils.transferTokens(toToken, partner, partnerShare);
        Utils.transferTokens(toToken, feeWallet, paraswapShare);

        return (fee);
    }
}

// File: original_contracts/routers/ProtectedMultiPath.sol

pragma solidity 0.7.5;






contract ProtectedMultiPath is FeeModel, IRouter {
    using SafeMath for uint256;

    constructor(
        uint256 _partnerSharePercent,
        uint256 _maxFeePercent
    )
        FeeModel(
            _partnerSharePercent,
            _maxFeePercent
        )
        public
    {

    }

    function initialize(bytes calldata data) override external {
        revert("METHOD NOT IMPLEMENTED");
    }

    function getKey() override external pure returns(bytes32) {
        return keccak256(abi.encodePacked("PROTECTED_MULTIPATH_ROUTER", "1.0.0"));
    }

    /**
   * @dev The function which performs the multi path swap.
   * @param data Data required to perform swap.
   */
    function protectedMultiSwap(
        Utils.SellData memory data
    )
        public
        payable
        returns (uint256)
    {   
        require(data.deadline >= block.timestamp, "Deadline breached");

        address fromToken = data.fromToken;
        uint256 fromAmount = data.fromAmount;
        require(msg.value == (fromToken == Utils.ethAddress() ? fromAmount : 0),
            "Incorrect msg.value");
        uint256 toAmount = data.toAmount;
        uint256 expectedAmount = data.expectedAmount;
        address payable beneficiary = data.beneficiary == address(0) ? msg.sender : data.beneficiary;
        Utils.Path[] memory path = data.path;
        address toToken = path[path.length - 1].to;

        require(toAmount > 0, "To amount can not be 0");

        //If source token is not ETH than transfer required amount of tokens
        //from sender to this contract
        transferTokensFromProxy(fromToken, fromAmount, data.permit);

        performSwap(
            fromToken,
            fromAmount,
            path
        );

        uint256 receivedAmount = Utils.tokenBalance(
            toToken,
            address(this)
        );

        require(
            receivedAmount >= toAmount,
            "Received amount of tokens are less then expected"
        );


        takeFeeAndTransferTokens(
            toToken,
            expectedAmount,
            receivedAmount,
            beneficiary,
            data.partner,
            data.feePercent
        );

        retrieveEth();

        emit Swapped2(
            data.uuid,
            data.partner,
            data.feePercent,
            msg.sender,
            beneficiary,
            fromToken,
            toToken,
            fromAmount,
            receivedAmount,
            expectedAmount
        );

        return receivedAmount;
    }

    /**
   * @dev The function which performs the mega path swap.
   * @param data Data required to perform swap.
   */
    function protectedMegaSwap(
        Utils.MegaSwapSellData memory data
    )
        public
        payable
        returns (uint256)
    {
        require(data.deadline >= block.timestamp, "Deadline breached");
        address fromToken = data.fromToken;
        uint256 fromAmount = data.fromAmount;
        require(msg.value == (fromToken == Utils.ethAddress() ? fromAmount : 0),
            "Incorrect msg.value");
        uint256 toAmount = data.toAmount;
        uint256 expectedAmount = data.expectedAmount;
        address payable beneficiary = data.beneficiary == address(0) ? msg.sender : data.beneficiary;
        Utils.MegaSwapPath[] memory path = data.path;
        address toToken = path[0].path[path[0].path.length - 1].to;

        require(toAmount > 0, "To amount can not be 0");

        //if fromToken is not ETH then transfer tokens from user to this contract
        transferTokensFromProxy(fromToken, fromAmount, data.permit);

        for (uint8 i = 0; i < uint8(path.length); i++) {
            uint256 _fromAmount = fromAmount.mul(path[i].fromAmountPercent).div(10000);
            if (i == path.length - 1) {
                _fromAmount = Utils.tokenBalance(address(fromToken), address(this));
            }
            performSwap(
                fromToken,
                _fromAmount,
                path[i].path
            );
        }

        uint256 receivedAmount = Utils.tokenBalance(
            toToken,
            address(this)
        );

        require(
            receivedAmount >= toAmount,
            "Received amount of tokens are less then expected"
        );


        takeFeeAndTransferTokens(
            toToken,
            expectedAmount,
            receivedAmount,
            beneficiary,
            data.partner,
            data.feePercent
        );

        retrieveEth();

        emit Swapped2(
            data.uuid,
            data.partner,
            data.feePercent,
            msg.sender,
            beneficiary,
            fromToken,
            toToken,
            fromAmount,
            receivedAmount,
            expectedAmount
        );

        return receivedAmount;
    }

    //Helper function to perform swap
    function performSwap(
        address fromToken,
        uint256 fromAmount,
        Utils.Path[] memory path
    )
        private
    {

        require(path.length > 0, "Path not provided for swap");

        //Assuming path will not be too long to reach out of gas exception
        for (uint i = 0; i < path.length; i++) {
            //_fromToken will be either fromToken or toToken of the previous path
            address _fromToken = i > 0 ? path[i - 1].to : fromToken;
            address _toToken = path[i].to;

            uint256 _fromAmount = i > 0 ? Utils.tokenBalance(_fromToken, address(this)) : fromAmount;

            for (uint j = 0; j < path[i].adapters.length; j++) {
                Utils.Adapter memory adapter = path[i].adapters[j];

                //Check if exchange is supported
                require(
                    IAugustusSwapperV5(address(this)).hasRole(WHITELISTED_ROLE, adapter.adapter),
                    "Exchange not whitelisted"
                );

                //Calculating tokens to be passed to the relevant exchange
                //percentage should be 200 for 2%
                uint fromAmountSlice =
                    i > 0 && j == path[i].adapters.length.sub(1)
                    ? Utils.tokenBalance(address(_fromToken), address(this))
                    : _fromAmount.mul(adapter.percent).div(10000);

                //DELEGATING CALL TO THE ADAPTER
                (bool success,) = adapter.adapter.delegatecall(
                    abi.encodeWithSelector(
                        IAdapter.swap.selector,
                        _fromToken,
                        _toToken,
                        fromAmountSlice,
                        uint256(0), //adapter.networkFee,
                        adapter.route
                    )
                );

                require(success, "Call to adapter failed");
            }
        }
    }

    function transferTokensFromProxy(
        address token,
        uint256 amount,
        bytes memory permit
    )
      private
    {
        if (token != Utils.ethAddress()) {
            Utils.permit(token, permit);
            tokenTransferProxy.transferFrom(
                token,
                msg.sender,
                address(this),
                amount
            );
        }
    }

    function retrieveEth() private {
        uint256 balance = address(this).balance;
        if (balance > 0) {
            (bool result, ) = msg.sender.call{value: balance, gas: 10000}("");
            require(result, "Failed to transfer Ether");
        }
    }
}