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// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.8.0;

import "interfaces/IRedSnwapper.sol";
import "interfaces/IERC20.sol";
import "./Auth.sol";

/// @title TokenChwomper for selling accumulated tokens for weth or other base assets
/// @notice This contract will be used for fee collection and breakdown
/// @dev Uses Auth contract for 2-step owner process and trust operators to guard functions
contract TokenChwomper is Auth {
  address public immutable weth;
  IRedSnwapper public redSnwapper;

  bytes4 private constant TRANSFER_SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));

  error TransferFailed();

  constructor(
    address _operator,
    address _redSnwapper,
    address _weth
  ) Auth(_operator) {
    // initial owner is msg.sender
    redSnwapper = IRedSnwapper(_redSnwapper);
    weth = _weth;
  }

  /// @notice Updates the RedSnwapper to be used for swapping tokens
  /// @dev make sure new RedSnwapper is backwards compatiable (should be)
  /// @param _redSnwapper The address of the new route processor
  function updateRedSnwapper(address _redSnwapper) external onlyOwner {
    redSnwapper = IRedSnwapper(_redSnwapper);
  }
  
  /// @notice Swaps tokens via the configured RedSnwapper
  /// @dev Must be called by a trusted operator
  /// @param tokenIn Address of the input token
  /// @param amountIn Amount of the input token to swap
  /// @param recipient Address to receive the output tokens
  /// @param tokenOut Address of the output token
  /// @param amountOutMin Minimum acceptable amount of output tokens (slippage protection)
  /// @param executor Address of the executor contract to perform the swap logic
  /// @param executorData Encoded data for the executor call
  /// @return amountOut The actual amount of output tokens received
  function snwap(
    address tokenIn,
    uint256 amountIn,
    address recipient,
    address tokenOut,
    uint256 amountOutMin,
    address executor,
    bytes calldata executorData
  ) external onlyTrusted returns (uint256 amountOut) {
     // Pre-fund RedSnwapper with input tokens
     _safeTransfer(tokenIn, address(redSnwapper), amountIn);

    // Execute snwap with zero amountIn
    amountOut = redSnwapper.snwap(
      tokenIn,
      0,
      recipient,
      tokenOut,
      amountOutMin,
      executor,
      executorData
    );
  }

  /// @notice Performs multiple swaps via the configured RedSnwapper
  /// @dev Must be called by a trusted operator
  /// @param inputTokens Array of input token parameters
  /// @param outputTokens Array of output token requirements
  /// @param executors Array of executor calls to perform
  /// @return amountOut Array of actual amounts of output tokens received
  function snwapMultiple(
    IRedSnwapper.InputToken[] calldata inputTokens,
    IRedSnwapper.OutputToken[] calldata outputTokens,
    IRedSnwapper.Executor[] calldata executors
  ) external onlyTrusted returns (uint256[] memory amountOut) {
   uint256 length = inputTokens.length;
    IRedSnwapper.InputToken[] memory _inputTokens = new IRedSnwapper.InputToken[](length);
    for (uint256 i = 0; i < length; ++i) {
        // Pre-fund RedSnwapper with input tokens
        _safeTransfer(
            inputTokens[i].token,
            address(redSnwapper),
            inputTokens[i].amountIn
        );
        // Build _inputTokens with zero amountIn
        _inputTokens[i] = IRedSnwapper.InputToken({
            token: inputTokens[i].token,
            amountIn: 0,
            transferTo: inputTokens[i].transferTo
        });
    }

    // Execute snwapMultiple
    amountOut = redSnwapper.snwapMultiple(
        _inputTokens,
        outputTokens,
        executors
    );
  }

  /// @notice Withdraw any token or eth from the contract
  /// @dev can only be called by owner
  /// @param token The address of the token to be withdrawn, 0x0 for eth
  /// @param to The address to send the token to
  /// @param _value The amount of the token to be withdrawn
  function withdraw(address token, address to, uint256 _value) onlyOwner external {
    if (token != address(0)) {
      _safeTransfer(token, to, _value);
    } 
    else {
      (bool success, ) = to.call{value: _value}("");
      require(success);
    }
  }
  
  function _safeTransfer(address token, address to, uint value) internal {
    (bool success, bytes memory data) = token.call(abi.encodeWithSelector(TRANSFER_SELECTOR, to, value));
    if (!success || (data.length != 0 && !abi.decode(data, (bool)))) revert TransferFailed();
  }

  /// @notice In case we receive any unwrapped eth (native token) we can call this
  /// @dev operators can call this 
  function wrapEth() onlyTrusted external {
    weth.call{value: address(this).balance}("");
  }

  /// @notice Available function in case we need to do any calls that aren't supported by the contract (unwinding lp positions, etc.)
  /// @dev can only be called by owner
  /// @param to The address to send the call to
  /// @param _value The amount of eth to send with the call
  /// @param data The data to be sent with the call
  function doAction(address to, uint256 _value, bytes memory data) onlyOwner external {
    (bool success, ) = to.call{value: _value}(data);
    require(success);
  }

  receive() external payable {}
}

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

pragma solidity >= 0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: UNLICENSED
pragma solidity >= 0.8.0;

interface IRedSnwapper {
    struct InputToken {
        address token;
        uint256 amountIn;
        address transferTo;
    }

    struct OutputToken {
        address token;
        address recipient;
        uint256 amountOutMin;
    }

    struct Executor {
        address executor;
        uint256 value;
        bytes data;
    }

    function snwap(
        address tokenIn,
        uint256 amountIn,
        address recipient,
        address tokenOut,
        uint256 amountOutMin,
        address executor,
        bytes calldata executorData
    ) external returns (uint256 amountOut);

    function snwapMultiple(
        InputToken[] calldata inputTokens,
        OutputToken[] calldata outputTokens,
        Executor[] calldata executors
    ) external returns (uint256[] memory amountOut);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../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.
 *
 * By default, the owner account will be the one that deploys the contract. 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;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @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 {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing 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 {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (access/Ownable2Step.sol)

pragma solidity ^0.8.0;

import "./Ownable.sol";

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2Step is Ownable {
    address private _pendingOwner;

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

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

    /**
     * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual override onlyOwner {
        _pendingOwner = newOwner;
        emit OwnershipTransferStarted(owner(), newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual override {
        delete _pendingOwner;
        super._transferOwnership(newOwner);
    }

    /**
     * @dev The new owner accepts the ownership transfer.
     */
    function acceptOwnership() external {
        address sender = _msgSender();
        require(pendingOwner() == sender, "Ownable2Step: caller is not the new owner");
        _transferOwnership(sender);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @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;
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.8.0;

import "openzeppelin/access/Ownable2Step.sol";

abstract contract Auth is Ownable2Step {

    event SetTrusted(address indexed user, bool isTrusted);

    mapping(address => bool) public trusted;

    error OnlyTrusted();

    modifier onlyTrusted() {
        if (!trusted[msg.sender]) revert OnlyTrusted();
        _;
    }

    constructor(address trustedUser) {
        trusted[trustedUser] = true;
        emit SetTrusted(trustedUser, true);
    }

    function setTrusted(address user, bool isTrusted) external onlyOwner {
        trusted[user] = isTrusted;
        emit SetTrusted(user, isTrusted);
    }

}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

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