// File: @openzeppelin/contracts/access/Ownable.sol



// 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);
    }
}

// File: @openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
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].
     */
    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);
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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);
}

// File: @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.sol";
import "../../../utils/Address.sol";

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

    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'
        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) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

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

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

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

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// File: @openzeppelin/contracts/utils/Address.sol



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

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://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");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

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

// File: @openzeppelin/contracts/utils/Context.sol



// 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;
    }
}

// File: contracts/interfaces/IPoolManager.sol



// SPDX-License-Identifier: MIT

/**
 __      __  _____ _______________________________________   
/  \    /  \/  _  \\______   \______   \_   _____/\______ \  
\   \/\/   /  /_\  \|       _/|     ___/|    __)_  |    |  \ 
 \        /    |    \    |   \|    |    |        \ |    `   \
  \__/\  /\____|__  /____|_  /|____|   /_______  //_______  /
       \/         \/       \/                  \/         \/ 
 */

pragma solidity 0.8.18;

/**
 * @title Exchange pool processor abstract contract.
 * @dev Keeps an enumerable set of designated exchange addresses as well as a single primary pool address.
 */
interface IPoolManager {
    /// @notice Primary exchange pool address.
    function primaryPool() external view returns (address);

    /**
     * @notice Check if the given address is pool address.
     * @param addr Address to check.
     * @return bool True if the given address is pool address.
     */
    function isPoolAddress(address addr) external view returns (bool);
}

// File: contracts/interfaces/ITreasuryHandler.sol



// SPDX-License-Identifier: MIT

/**
 __      __  _____ _______________________________________   
/  \    /  \/  _  \\______   \______   \_   _____/\______ \  
\   \/\/   /  /_\  \|       _/|     ___/|    __)_  |    |  \ 
 \        /    |    \    |   \|    |    |        \ |    `   \
  \__/\  /\____|__  /____|_  /|____|   /_______  //_______  /
       \/         \/       \/                  \/         \/ 
 */

pragma solidity 0.8.18;

/**
 * @title Treasury handler interface
 * @dev Any class that implements this interface can be used for protocol-specific operations pertaining to the treasury.
 */
interface ITreasuryHandler {
    /**
     * @notice Perform operations before a transfer is executed.
     * @param benefactor Address of the benefactor.
     * @param beneficiary Address of the beneficiary.
     * @param amount Number of tokens in the transfer.
     */
    function processTreasury(address benefactor, address beneficiary, uint256 amount) external;
}

// File: contracts/interfaces/IUniswapV2Router02.sol



// SPDX-License-Identifier: MIT

/**
 __      __  _____ _______________________________________   
/  \    /  \/  _  \\______   \______   \_   _____/\______ \  
\   \/\/   /  /_\  \|       _/|     ___/|    __)_  |    |  \ 
 \        /    |    \    |   \|    |    |        \ |    `   \
  \__/\  /\____|__  /____|_  /|____|   /_______  //_______  /
       \/         \/       \/                  \/         \/ 
 */

pragma solidity 0.8.18;

interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IUniswapV2Router01 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function getAmountsOut(uint256 amountIn, address[] calldata path) external view returns (uint256[] memory amounts);

    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

// File: contracts/WarpedTreasuryHandler.sol



// SPDX-License-Identifier: MIT

/**
 __      __  _____ _______________________________________   
/  \    /  \/  _  \\______   \______   \_   _____/\______ \  
\   \/\/   /  /_\  \|       _/|     ___/|    __)_  |    |  \ 
 \        /    |    \    |   \|    |    |        \ |    `   \
  \__/\  /\____|__  /____|_  /|____|   /_______  //_______  /
       \/         \/       \/                  \/         \/ 
 */

pragma solidity 0.8.18;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {Address} from "@openzeppelin/contracts/utils/Address.sol";
import {IUniswapV2Router02} from "./interfaces/IUniswapV2Router02.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import {IPoolManager} from "./interfaces/IPoolManager.sol";
import {ITreasuryHandler} from "./interfaces/ITreasuryHandler.sol";

/**
 * @title Treasury handler contract
 * @dev Sells tokens that have accumulated through taxes and sends the resulting ETH to the treasury. If
 * `liquidityBasisPoints` has been set to a non-zero value, then that percentage will instead be added to the designated
 * liquidity pool.
 */
contract WarpedTreasuryHandler is ITreasuryHandler, Ownable {
    using Address for address payable;
    using SafeERC20 for IERC20;

    IPoolManager public poolManager;

    /// @notice The Treasury address.
    address payable public treasury;

    /// @notice The token that accumulates through taxes. This will be sold for ETH.
    IERC20 public token;

    /// @notice The basis points of tokens to sell and add as liquidity to the pool.
    uint256 public liquidityBasisPoints;

    /// @notice The maximum price impact the sell (initiated from this contract) may have.
    uint256 public priceImpactBasisPoints;

    /// @dev swap contract balance if it's over this value
    uint256 private _taxSwap;

    bool private _isInitialized;

    /// @notice The Uniswap router that handles the sell and liquidity operations.
    IUniswapV2Router02 public constant UNISWAP_V2_ROUTER =
        IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);

    /// @notice Emitted when the basis points value of tokens to add as liquidity is updated.
    event LiquidityBasisPointsUpdated(uint256 oldBasisPoints, uint256 newBasisPoints);

    /// @notice Emitted when the maximum price impact basis points value is updated.
    event PriceImpactBasisPointsUpdated(uint256 oldBasisPoints, uint256 newBasisPoints);

    /// @notice Emitted when the treasury address is updated.
    event TreasuryAddressUpdated(address oldTreasuryAddress, address newTreasuryAddress);

    /// @notice Emitted when _taxSwap is updated.
    event TaxSwapUpdated(uint256 newValue);

    /// @notice Emitted when liquidity added successfully
    event LiquidityAdded(uint amountToken, uint amountETH, uint liquidity);

    /// @notice Constructor of tax handler contract
    /// @param _poolManager exchange pool manager address
    constructor(IPoolManager _poolManager) {
        poolManager = _poolManager;
    }

    /**
     * @notice Allow contract to accept ETH.
     */
    // solhint-disable-next-line no-empty-blocks
    receive() external payable {}

    /**
     * @param treasuryAddress Address of treasury to use.
     * @param tokenAddress Address of token to accumulate and sell.
     */
    function initialize(address treasuryAddress, address tokenAddress) external onlyOwner {
        require(!_isInitialized, "Already initialized");
        require(treasuryAddress != address(0), "treasury is zero address");
        require(tokenAddress != address(0), "token address is zero address");

        treasury = payable(treasuryAddress);
        token = IERC20(tokenAddress);
        liquidityBasisPoints = 0;
        priceImpactBasisPoints = 500;
        _taxSwap = 10_000_000 * 10 ** 18;
        _isInitialized = true;
    }

    /**
     * @notice Perform operations before a sell action (or a liquidity addition) is executed. The accumulated tokens are
     * then sold for ETH. In case the number of accumulated tokens exceeds the price impact percentage threshold, then
     * the number will be adjusted to stay within the threshold. If a non-zero percentage is set for liquidity, then
     * that percentage will be added to the primary liquidity pool instead of being sold for ETH and sent to the
     * treasury.
     * @param benefactor Address of the benefactor.
     * @param beneficiary Address of the beneficiary.
     * @param amount Number of tokens in the transfer.
     */
    function processTreasury(address benefactor, address beneficiary, uint256 amount) external override {
        if (!_isInitialized || benefactor == address(0x0)) {
            // skip when not initialized or mint
            return;
        }

        // No actions are done on transfers other than sells.
        if (!poolManager.isPoolAddress(beneficiary)) {
            return;
        }

        uint256 contractTokenBalance = token.balanceOf(address(this));
        if (contractTokenBalance > _taxSwap) {
            uint256 primaryPoolBalance = token.balanceOf(poolManager.primaryPool());
            uint256 maxPriceImpactSale = (primaryPoolBalance * priceImpactBasisPoints) / 10000;

            contractTokenBalance = _taxSwap > amount ? amount : _taxSwap;

            // Ensure the price impact is within reasonable bounds.
            if (contractTokenBalance > maxPriceImpactSale) {
                contractTokenBalance = maxPriceImpactSale;
            }

            // The number of tokens to sell for liquidity purposes. This is calculated as follows:
            //
            //      B     P
            //  L = - * -----
            //      2   10000
            //
            // Where:
            //  L = tokens to sell for liquidity
            //  B = available token balance
            //  P = basis points of tokens to use for liquidity
            //
            // The number is divided by two to preserve the token side of the token/WETH pool.
            uint256 tokensForLiquidity = (contractTokenBalance * liquidityBasisPoints) / 20000;
            uint256 tokensForSwap = contractTokenBalance - tokensForLiquidity;

            uint256 currentWeiBalance = address(this).balance;
            _swapTokensForEth(tokensForSwap);
            uint256 weiEarned = address(this).balance - currentWeiBalance;

            // No need to divide this number, because that was only to have enough tokens remaining to pair with this
            // ETH value.
            uint256 weiForLiquidity = (weiEarned * liquidityBasisPoints) / 10000;

            if (tokensForLiquidity > 0) {
                _addLiquidity(tokensForLiquidity, weiForLiquidity);
            }

            // It's cheaper to get the active balance rather than calculating based off of the `currentWeiBalance` and
            // `weiForLiquidity` numbers.
            uint256 remainingWeiBalance = address(this).balance;
            if (remainingWeiBalance > 0) {
                treasury.sendValue(remainingWeiBalance);
            }
        }
    }

    /**
     * @notice Set new liquidity basis points value.
     * @param newBasisPoints New liquidity basis points value. Cannot exceed 10,000 (i.e., 100%) as that would break the
     * calculation.
     */
    function setLiquidityBasisPoints(uint256 newBasisPoints) external onlyOwner {
        require(newBasisPoints <= 10000, "Max is 10000");

        uint256 oldBasisPoints = liquidityBasisPoints;
        liquidityBasisPoints = newBasisPoints;

        emit LiquidityBasisPointsUpdated(oldBasisPoints, newBasisPoints);
    }

    /**
     * @notice Set new price impact basis points value.
     * @param newBasisPoints New price impact basis points value.
     */
    function setPriceImpactBasisPoints(uint256 newBasisPoints) external onlyOwner {
        require(newBasisPoints < 1500, "Too high value");

        uint256 oldBasisPoints = priceImpactBasisPoints;
        priceImpactBasisPoints = newBasisPoints;

        emit PriceImpactBasisPointsUpdated(oldBasisPoints, newBasisPoints);
    }

    /**
     * @notice Set new treasury address.
     * @param newTreasuryAddress New treasury address.
     */
    function setTreasury(address newTreasuryAddress) external onlyOwner {
        require(newTreasuryAddress != address(0), "Zero address");

        address oldTreasuryAddress = address(treasury);
        treasury = payable(newTreasuryAddress);

        emit TreasuryAddressUpdated(oldTreasuryAddress, newTreasuryAddress);
    }

    /**
     * @notice Withdraw any tokens or ETH stuck in the treasury handler.
     * @param tokenAddress Address of the token to withdraw. If set to the zero address, ETH will be withdrawn.
     * @param amount The number of tokens to withdraw.
     */
    function withdraw(address tokenAddress, uint256 amount) external onlyOwner {
        if (tokenAddress == address(0)) {
            treasury.sendValue(amount);
        } else {
            IERC20(tokenAddress).safeTransfer(address(treasury), amount);
        }
    }

    function updateTaxSwap(uint256 taxSwap) external onlyOwner {
        require(taxSwap > 0, "Zero taxSwap");
        _taxSwap = taxSwap;
        emit TaxSwapUpdated(taxSwap);
    }

    /**
     * @dev Swap accumulated tokens for ETH.
     * @param tokenAmount Number of tokens to swap for ETH.
     */
    function _swapTokensForEth(uint256 tokenAmount) internal {
        // The ETH/token pool is the primary pool. It always exists.
        address[] memory path = new address[](2);
        path[0] = address(token);
        path[1] = UNISWAP_V2_ROUTER.WETH();

        // Call the getAmountsOut function to estimate the output amounts
        uint256[] memory amountsOut = UNISWAP_V2_ROUTER.getAmountsOut(tokenAmount, path);
        // Set the minimum amounts slightly below the estimated output amounts
        uint256 amountETHMin = amountsOut[1] - (amountsOut[1] / 100); // consider about 1 percent slippage

        // Ensure the router can perform the swap for the designated number of tokens.
        token.safeApprove(address(UNISWAP_V2_ROUTER), tokenAmount);
        UNISWAP_V2_ROUTER.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            amountETHMin,
            path,
            address(this),
            block.timestamp
        );
    }

    /**
     * @dev Add liquidity to primary pool.
     * @param tokenAmount Number of tokens to add as liquidity.
     * @param weiAmount ETH value to pair with the tokens.
     */
    function _addLiquidity(uint256 tokenAmount, uint256 weiAmount) internal {
        // Ensure the router can perform the transfer for the designated number of tokens.
        token.safeApprove(address(UNISWAP_V2_ROUTER), tokenAmount);

        // Create a dynamic array containing the token and ETH addresses in the desired order
        address[] memory path = new address[](2);
        path[0] = address(token);
        path[1] = UNISWAP_V2_ROUTER.WETH();

        // Call the getAmountsOut function to estimate the output amounts
        uint256[] memory amountsOut = UNISWAP_V2_ROUTER.getAmountsOut(tokenAmount, path);

        // Set the minimum amounts slightly below the estimated output amounts
        uint256 amountTokenMin = amountsOut[0] - (amountsOut[0] / 100); // consider about 1 percent slippage
        uint256 amountETHMin = amountsOut[1] - (amountsOut[1] / 100); // consider about 1 percent slippage

        // Both minimum values are set to zero to allow for any form of slippage.
        (uint amountToken, uint amountETH, uint liquidity) = UNISWAP_V2_ROUTER.addLiquidityETH{value: weiAmount}(
            address(token),
            tokenAmount,
            amountTokenMin,
            amountETHMin,
            address(treasury),
            block.timestamp
        );
        emit LiquidityAdded(amountToken, amountETH, liquidity);
    }
}