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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {IERC20, SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {EnumerableSet} from "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";

import {FeeAdapter} from "./FeeAdapter.sol";
import {IForwarderLogic} from "./interfaces/IForwarderLogic.sol";
import {RouterLib} from "./libraries/RouterLib.sol";
import {TokenLib} from "./libraries/TokenLib.sol";

/**
 * @title ForwarderLogic
 * @notice Forwarder logic contract to call another router.
 * Note: this contract will not work with transfer tax tokens.
 */
contract ForwarderLogic is FeeAdapter, IForwarderLogic {
    using EnumerableSet for EnumerableSet.AddressSet;
    using SafeERC20 for IERC20;

    address private immutable ROUTER;

    EnumerableSet.AddressSet private _trustedRouter;
    mapping(address => bool) private _blacklist;

    constructor(address router, address protocolFeeReceiver, uint96 protocolFeeShare)
        FeeAdapter(protocolFeeReceiver, protocolFeeShare)
    {
        if (router == address(0)) revert ForwarderLogic__InvalidRouter();
        ROUTER = router;
    }

    /**
     * @dev Returns the length of the trusted routers.
     */
    function getTrustedRouterLength() external view override returns (uint256) {
        return _trustedRouter.length();
    }

    /**
     * @dev Returns the trusted router at the specified index.
     */
    function getTrustedRouterAt(uint256 index) external view override returns (address) {
        return _trustedRouter.at(index);
    }

    /**
     * @dev Returns the blacklist status of the account.
     */
    function isBlacklisted(address account) external view override returns (bool) {
        return _blacklist[account];
    }

    /**
     * @dev Swaps an exact amount of tokenIn for as much tokenOut as possible using an external router.
     * The function will simply forward the call to the router and return the amount of tokenIn and tokenOut swapped.
     *
     * Requirements:
     * - The caller must be the router.
     * - The third party router must be trusted.
     * - The data must be formatted using:
     *   - if 0 fee, `abi.encodePacked(approval, router, uint16(0), routerData)`
     *   - else, `abi.encodePacked(approval, router, uint16(feePercent), bool(isFeeTokenIn), allocatee, routerData)`
     * - The fee amount must be less than or equal to the amountIn.
     * - The router data must use at most `amountIn - feeAmount` of tokenIn.
     */
    function swapExactIn(
        address tokenIn,
        address tokenOut,
        uint256 amountIn,
        uint256,
        address from,
        address to,
        bytes calldata data
    ) external override returns (uint256, uint256) {
        if (msg.sender != ROUTER) revert ForwarderLogic__OnlyRouter();
        if (_blacklist[from] || (from != to && _blacklist[to])) revert ForwarderLogic__Blacklisted();

        RouterLib.transfer(ROUTER, tokenIn, from, address(this), amountIn);

        uint256 feePercent = uint256(uint16(bytes2(data[40:42])));
        (uint256 isFeeTokenIn, address allocatee, bytes memory routerData) = feePercent == 0
            ? (0, address(0), data[42:])
            : ((bytes1(data[42:43]) != 0 ? 1 : 2), address(uint160(bytes20(data[43:63]))), data[63:]);

        address tokenIn_ = tokenIn;
        address tokenOut_ = tokenOut;

        uint256 amountInWithoutFee = amountIn;
        if (isFeeTokenIn == 1) {
            uint256 feeAmount = (amountInWithoutFee * feePercent) / BPS;
            amountInWithoutFee -= feeAmount;
            _sendFee(tokenIn_, address(this), allocatee, feeAmount);
        }

        {
            address approval = address(uint160(bytes20(data[0:20])));
            address router = address(uint160(bytes20(data[20:40])));

            SafeERC20.forceApprove(IERC20(tokenIn_), approval, amountInWithoutFee);

            _call(router, routerData);

            // Will always revert if amountIn is type(uint256).max, but it will never happen in practice.
            uint256 allowance = IERC20(tokenIn_).allowance(address(this), approval);
            if (allowance != 0) revert ForwarderLogic__UnspentAmountIn();
        }

        uint256 amountOut = TokenLib.balanceOf(tokenOut_, address(this));

        if (isFeeTokenIn == 2) {
            uint256 feeAmount = (amountOut * feePercent) / BPS;
            amountOut -= feeAmount;
            _sendFee(tokenOut_, address(this), allocatee, feeAmount);
        }

        TokenLib.transfer(tokenOut_, to, amountOut);

        return (amountIn, amountOut);
    }

    /**
     * @dev Reverts as there is no real way to only take the required amount of token in.
     */
    function swapExactOut(address, address, uint256, uint256, address, address, bytes calldata)
        external
        pure
        returns (uint256, uint256)
    {
        revert ForwarderLogic__NotImplemented();
    }

    /**
     * @dev Sweeps tokens from the contract to the recipient.
     *
     * Requirements:
     * - The caller must be the router owner.
     */
    function sweep(address token, address to, uint256 amount) external override {
        _checkSender();

        token == address(0) ? TokenLib.transferNative(to, amount) : TokenLib.transfer(token, to, amount);
    }

    /**
     * @dev Updates the trusted routers.
     *
     * Requirements:
     * - The caller must be the router owner.
     */
    function updateTrustedRouter(address router, bool add) external override {
        _checkSender();

        if (!(add ? _trustedRouter.add(router) : _trustedRouter.remove(router))) {
            revert ForwarderLogic__RouterUpdateFailed();
        }

        emit TrustedRouterUpdated(router, add);
    }

    /**
     * @dev Updates the blacklist.
     *
     * Requirements:
     * - The caller must be the router owner.
     */
    function updateBlacklist(address account, bool blacklisted) external override {
        _checkSender();

        _blacklist[account] = blacklisted;

        emit BlacklistUpdated(account, blacklisted);
    }

    /**
     * @dev Checks if the sender is the router's owner.
     *
     * Requirements:
     * - The sender must be the router's owner.
     */
    function _checkSender() internal view override {
        if (msg.sender != Ownable(ROUTER).owner()) revert ForwarderLogic__OnlyRouterOwner();
    }

    /**
     * @dev Calls the target contract with the provided data.
     *
     * Requirements:
     * - The call must be successful.
     * - The target contract must have code.
     */
    function _call(address router, bytes memory data) private {
        if (!_trustedRouter.contains(router)) revert ForwarderLogic__UntrustedRouter();

        uint256 successState;
        assembly ("memory-safe") {
            successState := call(gas(), router, 0, add(data, 32), mload(data), 0, 0)

            if iszero(successState) {
                returndatacopy(0, 0, returndatasize())
                revert(0, returndatasize())
            }

            if iszero(returndatasize()) {
                if iszero(extcodesize(router)) {
                    mstore(0, 0x595e4957) // ForwarderLogic__NoCode()
                    revert(0x1c, 4)
                }
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC20Permit} from "../extensions/IERC20Permit.sol";
import {Address} from "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev An operation with an ERC20 token failed.
     */
    error SafeERC20FailedOperation(address token);

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

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

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

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));

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

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data);
        if (returndata.length != 0 && !abi.decode(returndata, (bool))) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/structs/EnumerableSet.sol)
// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.

pragma solidity ^0.8.20;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```solidity
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 *
 * [WARNING]
 * ====
 * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure
 * unusable.
 * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an
 * array of EnumerableSet.
 * ====
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position is the index of the value in the `values` array plus 1.
        // Position 0 is used to mean a value is not in the set.
        mapping(bytes32 value => uint256) _positions;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._positions[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We cache the value's position to prevent multiple reads from the same storage slot
        uint256 position = set._positions[value];

        if (position != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 valueIndex = position - 1;
            uint256 lastIndex = set._values.length - 1;

            if (valueIndex != lastIndex) {
                bytes32 lastValue = set._values[lastIndex];

                // Move the lastValue to the index where the value to delete is
                set._values[valueIndex] = lastValue;
                // Update the tracked position of the lastValue (that was just moved)
                set._positions[lastValue] = position;
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the tracked position for the deleted slot
            delete set._positions[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._positions[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        bytes32[] memory store = _values(set._inner);
        bytes32[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

/**
 * @title TokenLib
 * @dev Helper library for token operations, such as balanceOf, transfer, transferFrom, wrap, and unwrap.
 */
library TokenLib {
    error TokenLib__BalanceOfFailed();
    error TokenLib__WrapFailed();
    error TokenLib__UnwrapFailed();
    error TokenLib__NativeTransferFailed();
    error TokenLib__TransferFromFailed();
    error TokenLib__TransferFailed();
    error TokenLib__ApproveFailed();

    /**
     * @dev Returns the balance of a token for an account.
     *
     * Requirements:
     * - The call must succeed.
     * - The target contract must return at least 32 bytes.
     */
    function balanceOf(address token, address account) internal view returns (uint256 amount) {
        uint256 success;
        uint256 returnDataSize;

        assembly ("memory-safe") {
            mstore(0, 0x70a08231) // balanceOf(address)
            mstore(32, account)

            success := staticcall(gas(), token, 28, 36, 0, 32)

            returnDataSize := returndatasize()

            amount := mload(0)
        }

        if (success == 0) _tryRevertWithReason();

        // If call failed, and it didn't already bubble up the revert reason, then the return data size must be 0,
        // which will revert here with a generic error message
        if (returnDataSize < 32) revert TokenLib__BalanceOfFailed();
    }

    /**
     * @dev Returns the balance of a token for an account, or the native balance of the account if the token is the
     * native token.
     *
     * Requirements:
     * - The call must succeed (if the token is not the native token).
     * - The target contract must return at least 32 bytes (if the token is not the native token).
     */
    function universalBalanceOf(address token, address account) internal view returns (uint256 amount) {
        return token == address(0) ? account.balance : balanceOf(token, account);
    }

    /**
     * @dev Transfers native tokens to an account.
     *
     * Requirements:
     * - The call must succeed.
     */
    function transferNative(address to, uint256 amount) internal {
        uint256 success;

        assembly ("memory-safe") {
            success := call(gas(), to, amount, 0, 0, 0, 0)
        }

        if (success == 0) {
            _tryRevertWithReason();
            revert TokenLib__NativeTransferFailed();
        }
    }

    /**
     * @dev Transfers tokens from an account to another account.
     * This function does not check if the target contract has code, this should be done before calling this function
     *
     * Requirements:
     * - The call must succeed.
     */
    function wrap(address wnative, uint256 amount) internal {
        uint256 success;

        assembly ("memory-safe") {
            mstore(0, 0xd0e30db0) // deposit()

            success := call(gas(), wnative, amount, 28, 4, 0, 0)
        }

        if (success == 0) {
            _tryRevertWithReason();
            revert TokenLib__WrapFailed();
        }
    }

    /**
     * @dev Transfers tokens from an account to another account.
     * This function does not check if the target contract has code, this should be done before calling this function
     *
     * Requirements:
     * - The call must succeed.
     */
    function unwrap(address wnative, uint256 amount) internal {
        uint256 success;

        assembly ("memory-safe") {
            mstore(0, 0x2e1a7d4d) // withdraw(uint256)
            mstore(32, amount)

            success := call(gas(), wnative, 0, 28, 36, 0, 0)
        }

        if (success == 0) {
            _tryRevertWithReason();
            revert TokenLib__UnwrapFailed();
        }
    }

    /**
     * @dev Transfers tokens from an account to another account.
     *
     * Requirements:
     * - The call must succeed
     * - The target contract must either return true or no value.
     * - The target contract must have code.
     */
    function transfer(address token, address to, uint256 amount) internal {
        uint256 success;
        uint256 returnSize;
        uint256 returnValue;

        assembly ("memory-safe") {
            let m0x40 := mload(0x40)

            mstore(0, 0xa9059cbb) // transfer(address,uint256)
            mstore(32, to)
            mstore(64, amount)

            success := call(gas(), token, 0, 28, 68, 0, 32)

            returnSize := returndatasize()
            returnValue := mload(0)

            mstore(0x40, m0x40)
        }

        if (success == 0) {
            _tryRevertWithReason();
            revert TokenLib__TransferFailed();
        }

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

    /**
     * @dev Transfers tokens from an account to another account.
     *
     * Requirements:
     * - The call must succeed.
     * - The target contract must either return true or no value.
     * - The target contract must have code.
     */
    function transferFrom(address token, address from, address to, uint256 amount) internal {
        uint256 success;
        uint256 returnSize;
        uint256 returnValue;

        assembly ("memory-safe") {
            let m0x40 := mload(0x40)
            let m0x60 := mload(0x60)

            mstore(0, 0x23b872dd) // transferFrom(address,address,uint256)
            mstore(32, from)
            mstore(64, to)
            mstore(96, amount)

            success := call(gas(), token, 0, 28, 100, 0, 32)

            returnSize := returndatasize()
            returnValue := mload(0)

            mstore(0x40, m0x40)
            mstore(0x60, m0x60)
        }

        if (success == 0) {
            _tryRevertWithReason();
            revert TokenLib__TransferFromFailed();
        }

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

    /**
     * @dev Approves an account to spend tokens on behalf of the caller.
     *
     * Requirements:
     * - The call must succeed.
     * - The target contract must either return true or no value.
     * - The target contract must have code.
     */
    function forceApprove(address token, address spender, uint256 amount) internal {
        uint256 success;
        uint256 returnSize;
        uint256 returnValue;

        assembly ("memory-safe") {
            function approve(token_, amount_) -> success_ {
                mstore(64, amount_)
                success_ := call(gas(), token_, 0, 28, 68, 64, 32)
            }

            let m0x40 := mload(0x40)

            mstore(0, 0x095ea7b3) // approve(address,uint256)
            mstore(32, spender)

            success := approve(token, amount)
            if iszero(and(eq(mload(64), 1), success)) {
                if iszero(lt(or(iszero(extcodesize(token)), returndatasize()), success)) {
                    pop(approve(token, 0))
                    success := approve(token, amount)
                }
            }

            returnSize := returndatasize()
            returnValue := mload(64)

            mstore(0x40, m0x40)
        }

        if (success == 0) {
            _tryRevertWithReason();
            revert TokenLib__ApproveFailed();
        }

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

    /**
     * @dev Tries to bubble up the revert reason.
     * This function needs to be called only if the call has failed, and will revert if there is a revert reason.
     * This function might no revert if there is no revert reason, always use it in conjunction with a revert.
     */
    function _tryRevertWithReason() private pure {
        assembly ("memory-safe") {
            if returndatasize() {
                returndatacopy(0, 0, returndatasize())
                revert(0, returndatasize())
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

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

pragma solidity ^0.8.20;

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

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

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

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) {
            revert AddressInsufficientBalance(address(this));
        }

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

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason or custom error, it is bubbled
     * up by this function (like regular Solidity function calls). However, if
     * the call reverted with no returned reason, this function reverts with a
     * {FailedInnerCall} error.
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) {
            revert AddressInsufficientBalance(address(this));
        }
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

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

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

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

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

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

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IFeeAdapter {
    error FeeAdapter__InvalidProtocolFeeReceiver();
    error FeeAdapter__InvalidProtocolFeeShare();
    error FeeAdapter__InvalidFeeReceiver();
    error FeeAdapter__InvalidFrom();

    event ProtocolFeeParametersSet(
        address indexed sender, address indexed protocolFeeReceiver, uint96 protocolFeeShare
    );
    event FeeSent(address indexed token, address indexed allocatee, uint256 feeAmount, uint256 protocolFeeAmount);

    function getProtocolFeeRecipient() external view returns (address);

    function getProtocolFeeShare() external view returns (uint256);

    function setProtocolFeeParameters(address feeReceiver, uint96 feeShare) external;
}

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

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {IFeeAdapter} from "./interfaces/IFeeAdapter.sol";
import {TokenLib} from "./libraries/TokenLib.sol";

/**
 * @title FeeAdapter
 * @notice This contract handles the fee sharing logic for the router.
 * It allows setting the protocol fee parameters and sending fees to the protocol fee recipient.
 * When sending fees, it splits the fee between the protocol fee recipient and the fee recipient
 * based on the protocol fee share. E.g. if the protocol fee share is 10% and the fee amount is 100,
 * then 10 will be sent to the protocol fee recipient and 90 will be sent to the fee recipient.
 */
abstract contract FeeAdapter is IFeeAdapter {
    uint256 internal constant BPS = 10_000;

    address private _protocolFeeRecipient;
    uint96 private _protocolFeeShare;

    constructor(address feeReceiver, uint96 feeShare) {
        _setProtocolFeeParameters(feeReceiver, feeShare);
    }

    /**
     * @dev Returns the protocol fee recipient address.
     */
    function getProtocolFeeRecipient() external view override returns (address) {
        return _protocolFeeRecipient;
    }

    /**
     * @dev Returns the protocol fee share.
     */
    function getProtocolFeeShare() external view override returns (uint256) {
        return _protocolFeeShare;
    }

    /**
     * @dev Sets the protocol fee parameters.
     *
     * Requirements:
     * - The caller must be authorized.
     * - The fee receiver address must not be zero.
     * - The fee share must be less than or equal to 10_000 (100%).
     */
    function setProtocolFeeParameters(address feeReceiver, uint96 feeShare) external override {
        _checkSender();
        _setProtocolFeeParameters(feeReceiver, feeShare);
    }

    /**
     * @dev Internal function to set the protocol fee parameters.
     *
     * Requirements:
     * - The fee receiver address must not be zero.
     * - The fee share must be less than or equal to 10_000 (100%).
     */
    function _setProtocolFeeParameters(address protocolFeeReceiver, uint96 protocolFeeShare) internal {
        if (protocolFeeReceiver == address(0)) revert FeeAdapter__InvalidProtocolFeeReceiver();
        if (protocolFeeShare > BPS) revert FeeAdapter__InvalidProtocolFeeShare();

        _protocolFeeRecipient = protocolFeeReceiver;
        _protocolFeeShare = protocolFeeShare;

        emit ProtocolFeeParametersSet(msg.sender, protocolFeeReceiver, protocolFeeShare);
    }

    /**
     * @dev Internal function to send the fee to the fee recipient.
     * The user parameter is only used for event logging.
     *
     * Requirements:
     * - The fee recipient address must not be zero.
     * - The fee amount must be greater than zero.
     */
    function _sendFee(address token, address payer, address allocatee, uint256 feeAmount) internal {
        if (feeAmount > 0) {
            if (allocatee == address(0)) revert FeeAdapter__InvalidFeeReceiver();

            uint256 protocolFeeAmount = (feeAmount * _protocolFeeShare) / BPS;
            uint256 remainingFeeAmount = feeAmount - protocolFeeAmount;

            if (remainingFeeAmount > 0) _transferFee(token, payer, allocatee, remainingFeeAmount);
            if (protocolFeeAmount > 0) _transferFee(token, payer, _protocolFeeRecipient, protocolFeeAmount);

            emit FeeSent(token, allocatee, feeAmount, protocolFeeAmount);
        }
    }

    /**
     * @dev Internal function to transfer tokens from the contract to the recipient.
     *
     * Requirements:
     * - The sender must be the contract itself.
     */
    function _transferFee(address token, address from, address to, uint256 amount) internal virtual {
        if (from != address(this)) revert FeeAdapter__InvalidFrom();
        TokenLib.transfer(token, to, amount);
    }

    /**
     * @dev Internal function to check if the sender is authorized.
     * Must be implemented in the derived contract.
     */
    function _checkSender() internal view virtual;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

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

interface IForwarderLogic is IFeeAdapter {
    error ForwarderLogic__InvalidRouter();
    error ForwarderLogic__NotImplemented();
    error ForwarderLogic__OnlyRouterOwner();
    error ForwarderLogic__NoCode();
    error ForwarderLogic__OnlyRouter();
    error ForwarderLogic__RouterUpdateFailed();
    error ForwarderLogic__UntrustedRouter();
    error ForwarderLogic__Blacklisted();
    error ForwarderLogic__UnspentAmountIn();

    event TrustedRouterUpdated(address indexed router, bool trusted);
    event BlacklistUpdated(address indexed account, bool blacklisted);

    function getTrustedRouterLength() external view returns (uint256);

    function getTrustedRouterAt(uint256 index) external view returns (address);

    function isBlacklisted(address account) external view returns (bool);

    function swapExactIn(
        address tokenIn,
        address tokenOut,
        uint256 amountIn,
        uint256 amountOutMin,
        address from,
        address to,
        bytes calldata route
    ) external returns (uint256 totalIn, uint256 totalOut);

    function sweep(address token, address to, uint256 amount) external;

    function updateTrustedRouter(address router, bool add) external;

    function updateBlacklist(address account, bool blacklisted) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

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

/**
 * @title RouterLib
 * @dev Helper library for router operations, such as validateAndTransfer, transfer, and swap.
 * The router must implement a fallback function that uses `validateAndTransfer` to validate the allowance
 * and transfer the tokens and functions that uses `swap` to call the router logic to swap tokens.
 * The router logic must implement the `swapExactIn` and `swapExactOut` functions to swap tokens and
 * use the `transfer` function to transfer tokens from the router according to the route selected.
 */
library RouterLib {
    error RouterLib__ZeroAmount();
    error RouterLib__InsufficientAllowance(uint256 allowance, uint256 amount);

    /**
     * @dev Returns the slot for the allowance of a token for a sender from an address.
     */
    function getAllowanceSlot(
        mapping(bytes32 key => uint256) storage allowances,
        address token,
        address sender,
        address from
    ) internal pure returns (bytes32 s) {
        assembly ("memory-safe") {
            mstore(0, shl(96, token))
            mstore(20, shl(96, sender))

            // Overwrite the last 8 bytes of the free memory pointer with zero,
            //which should always be zeros
            mstore(40, shl(96, from))

            let key := keccak256(0, 60)

            mstore(0, key)
            mstore(32, allowances.slot)

            s := keccak256(0, 64)
        }
    }

    /**
     * @dev Validates the allowance of a token for a sender from an address, and transfers the token.
     *
     * Requirements:
     * - The allowance must be greater than or equal to the amount.
     * - The amount must be greater than zero.
     * - If from is not the router, the token must have been approved for the router.
     */
    function validateAndTransfer(mapping(bytes32 key => uint256) storage allowances) internal {
        address token;
        address from;
        address to;
        uint256 amount;
        uint256 allowance;

        uint256 success;
        assembly ("memory-safe") {
            token := shr(96, calldataload(4))
            from := shr(96, calldataload(24))
            to := shr(96, calldataload(44))
            amount := calldataload(64)
        }

        bytes32 allowanceSlot = getAllowanceSlot(allowances, token, msg.sender, from);

        assembly ("memory-safe") {
            allowance := sload(allowanceSlot)

            if iszero(lt(allowance, amount)) {
                success := 1

                sstore(allowanceSlot, sub(allowance, amount))
            }
        }

        if (amount == 0) revert RouterLib__ZeroAmount(); // Also prevent calldata <= 64
        if (success == 0) revert RouterLib__InsufficientAllowance(allowance, amount);

        from == address(this) ? TokenLib.transfer(token, to, amount) : TokenLib.transferFrom(token, from, to, amount);
    }

    /**
     * @dev Calls the router to transfer tokens from an account to another account.
     *
     * Requirements:
     * - The call must succeed.
     * - The target contract must use `validateAndTransfer` inside its fallback function to validate the allowance
     *   and transfer the tokens accordingly.
     */
    function transfer(address router, address token, address from, address to, uint256 amount) internal {
        assembly ("memory-safe") {
            let m0x40 := mload(0x40)

            mstore(0, shr(32, shl(96, token)))
            mstore(24, shl(96, from))
            mstore(44, shl(96, to))
            mstore(64, amount)

            if iszero(call(gas(), router, 0, 0, 96, 0, 0)) {
                returndatacopy(0, 0, returndatasize())
                revert(0, returndatasize())
            }

            mstore(0x40, m0x40)
        }
    }

    /**
     * @dev Swaps tokens using the router logic.
     * It will also set the allowance for the logic contract to spend the token from the sender and reset it
     * after the swap is done.
     *
     * Requirements:
     * - The logic contract must not be the zero address.
     * - The call must succeed.
     * - The logic contract must call this contract's fallback function to validate the allowance and transfer the
     *   tokens.
     */
    function swap(
        mapping(bytes32 key => uint256) storage allowances,
        address tokenIn,
        address tokenOut,
        uint256 amountIn,
        uint256 amountOut,
        address from,
        address to,
        bytes calldata route,
        bool exactIn,
        address logic
    ) internal returns (uint256 totalIn, uint256 totalOut) {
        bytes32 allowanceSlot = getAllowanceSlot(allowances, tokenIn, logic, from);

        uint256 length = 256 + route.length; // 32 * 6 + 32 + 32 + route.length
        bytes memory data = new bytes(length);

        assembly ("memory-safe") {
            sstore(allowanceSlot, amountIn)

            switch exactIn
            // swapExactIn(tokenIn, tokenOut, amountIn, amountOut, from, to, route)
            // swapExactOut(tokenIn, tokenOut, amountOut, amountIn, from, to, route)
            case 1 { mstore(data, 0xbd084435) }
            default { mstore(data, 0xcb7e0007) }

            mstore(add(data, 32), tokenIn)
            mstore(add(data, 64), tokenOut)
            mstore(add(data, 96), amountIn)
            mstore(add(data, 128), amountOut)
            mstore(add(data, 160), from)
            mstore(add(data, 192), to)
            mstore(add(data, 224), 224) // 32 * 6 + 32
            mstore(add(data, 256), route.length)
            calldatacopy(add(data, 288), route.offset, route.length)

            if iszero(call(gas(), logic, 0, add(data, 28), add(length, 4), 0, 64)) {
                returndatacopy(0, 0, returndatasize())
                revert(0, returndatasize())
            }

            totalIn := mload(0)
            totalOut := mload(32)

            sstore(allowanceSlot, 0)
        }
    }
}

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

pragma solidity ^0.8.20;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "evmVersion": "paris",
  "remappings": [
    "@forge-std/contracts/=lib/forge-std/src/",
    "@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "ds-test/=lib/openzeppelin-contracts-upgradeable/lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=lib/openzeppelin-contracts-upgradeable/lib/erc4626-tests/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ],
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"router","type":"address"},{"internalType":"address","name":"protocolFeeReceiver","type":"address"},{"internalType":"uint96","name":"protocolFeeShare","type":"uint96"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"AddressEmptyCode","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"AddressInsufficientBalance","type":"error"},{"inputs":[],"name":"FailedInnerCall","type":"error"},{"inputs":[],"name":"FeeAdapter__InvalidFeeReceiver","type":"error"},{"inputs":[],"name":"FeeAdapter__InvalidFrom","type":"error"},{"inputs":[],"name":"FeeAdapter__InvalidProtocolFeeReceiver","type":"error"},{"inputs":[],"name":"FeeAdapter__InvalidProtocolFeeShare","type":"error"},{"inputs":[],"name":"ForwarderLogic__Blacklisted","type":"error"},{"inputs":[],"name":"ForwarderLogic__InvalidRouter","type":"error"},{"inputs":[],"name":"ForwarderLogic__NoCode","type":"error"},{"inputs":[],"name":"ForwarderLogic__NotImplemented","type":"error"},{"inputs":[],"name":"ForwarderLogic__OnlyRouter","type":"error"},{"inputs":[],"name":"ForwarderLogic__OnlyRouterOwner","type":"error"},{"inputs":[],"name":"ForwarderLogic__RouterUpdateFailed","type":"error"},{"inputs":[],"name":"ForwarderLogic__UnspentAmountIn","type":"error"},{"inputs":[],"name":"ForwarderLogic__UntrustedRouter","type":"error"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"SafeERC20FailedOperation","type":"error"},{"inputs":[],"name":"TokenLib__BalanceOfFailed","type":"error"},{"inputs":[],"name":"TokenLib__NativeTransferFailed","type":"error"},{"inputs":[],"name":"TokenLib__TransferFailed","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"bool","name":"blacklisted","type":"bool"}],"name":"BlacklistUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":true,"internalType":"address","name":"allocatee","type":"address"},{"indexed":false,"internalType":"uint256","name":"feeAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"protocolFeeAmount","type":"uint256"}],"name":"FeeSent","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":true,"internalType":"address","name":"protocolFeeReceiver","type":"address"},{"indexed":false,"internalType":"uint96","name":"protocolFeeShare","type":"uint96"}],"name":"ProtocolFeeParametersSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"router","type":"address"},{"indexed":false,"internalType":"bool","name":"trusted","type":"bool"}],"name":"TrustedRouterUpdated","type":"event"},{"inputs":[],"name":"getProtocolFeeRecipient","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getProtocolFeeShare","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"getTrustedRouterAt","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTrustedRouterLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"isBlacklisted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"feeReceiver","type":"address"},{"internalType":"uint96","name":"feeShare","type":"uint96"}],"name":"setProtocolFeeParameters","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"swapExactIn","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"swapExactOut","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"sweep","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bool","name":"blacklisted","type":"bool"}],"name":"updateBlacklist","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"router","type":"address"},{"internalType":"bool","name":"add","type":"bool"}],"name":"updateTrustedRouter","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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00000000000000000000000045a62b090df48243f12a21897e7ed91863e2c86b0000000000000000000000003333d2af1f8959f6572d45adc3dcd99cf77ea41a00000000000000000000000000000000000000000000000000000000000005dc

-----Decoded View---------------
Arg [0] : router (address): 0x45A62B090DF48243F12A21897e7ed91863E2c86b
Arg [1] : protocolFeeReceiver (address): 0x3333d2AF1f8959F6572d45adC3dCd99cF77Ea41A
Arg [2] : protocolFeeShare (uint96): 1500

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000045a62b090df48243f12a21897e7ed91863e2c86b
Arg [1] : 0000000000000000000000003333d2af1f8959f6572d45adc3dcd99cf77ea41a
Arg [2] : 00000000000000000000000000000000000000000000000000000000000005dc