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



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



// 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);
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

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

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

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

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

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

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

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

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

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

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

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

// 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: @openzeppelin/contracts/utils/math/SafeMath.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

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

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

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

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// File: contracts/interfaces/IDynamicThresholdOracle.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IDynamicThresholdOracle {
    function getBuyThreshold() external view returns (uint);
}
// File: contracts/interfaces/IUniswapV2Factory.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IUniswapV2Factory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint
    );

    function feeTo() external view returns (address);

    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB)
        external
        view
        returns (address pair);

    function allPairs(uint) external view returns (address pair);

    function allPairsLength() external view returns (uint);

    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;
}
// File: contracts/interfaces/IUniswapV2Router02.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IUniswapV2Router02 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    )
        external
        returns (
            uint amountA,
            uint amountB,
            uint liquidity
        );

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

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}
// File: contracts/MegaMoon.sol



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

/*
    MEGAMOON
    $MEGAM

    Website: https://megamooncoin.com/
    Twitter: https://twitter.com/MEGAMOON_eth
    Telegram: https://t.me/MEGAMOON_eth
 */

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";

import "./interfaces/IUniswapV2Factory.sol";
import "./interfaces/IUniswapV2Router02.sol";
import "./interfaces/IDynamicThresholdOracle.sol";

contract MegaMoon is IERC20, Ownable {
    using Address for address payable;
 
    mapping (address => uint) private _rOwned;
    mapping (address => uint) private _tOwned;
    mapping (address => mapping (address => uint)) private _allowances;
    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => bool) private _isExcluded;
 
    address[] private _excluded;
 
    bool public swapEnabled;
    bool private swapping;
    bool public tradingEnabled;
 
    IUniswapV2Router02 public router;
    IDynamicThresholdOracle public oracle;
    address public pair;
    address public buybackWallet;
    address public marketingWallet;
 
    uint8 private constant _decimals = 18;
    uint private constant MAX = ~uint(0);
 
    uint private _tTotal = 1_000_000_000 * 10**_decimals;
    uint private _rTotal = (MAX - (MAX % _tTotal));
 
    uint public totalRfi;
    uint public swapThreshold = 2 * _tTotal / 1000; // 0.2%
    uint public maxTxAmount = 10 * _tTotal / 1000; // 1.0%
    uint public maxWalletAmount = 20 * _tTotal / 1000; // 2.0%
    uint public staticBuyThreshold = _tTotal / 1000; // 0.1%
    uint public startBlock;
    uint public offlineBlocks = 5;
 
    uint public buyTax = 150; // 15% during offline blocks
    uint public sellTax = 150; // 15% max sell tax
    uint public dynamicTax = 30; // 3% -> 0%, 3%, 6%, 9%, 12%, 15%
    uint public maxSellTax = 150; // 15%
 
    string private constant _name = "MEGAMOON";
    string private constant _symbol = "MEGAM";
 
    struct TaxesPercentage {
        uint rfi;
        uint buyback;
        uint marketing;
    }
 
    TaxesPercentage public taxesPercentage = TaxesPercentage(40, 40, 20);
 
    struct valuesFromGetValues {
        uint rAmount;
        uint rTransferAmount;
        uint rRfi;
        uint rSwap;
        uint tTransferAmount;
        uint tRfi;
        uint tSwap;
    }
 
    modifier lockTheSwap {
        swapping = true;
        _;
        swapping = false;
    }

    modifier onlyOwnerOrOracle {
        require(
            msg.sender == owner() ||
            msg.sender == address(oracle), 
            "Only the owner or oracle can make this call!"
        );
        _;
    }
 
    constructor (
        address _routerAddress, 
        address _buybackWallet, 
        address _marketingWallet
    ) {
        IUniswapV2Router02 _router = IUniswapV2Router02(_routerAddress);
        address _pair = IUniswapV2Factory(_router.factory())
            .createPair(address(this), _router.WETH());
 
        router = _router;
        pair = _pair;
 
        excludeFromReward(pair);
        excludeFromReward(address(0xdead));
 
        _rOwned[msg.sender] = _rTotal;
        _isExcludedFromFee[msg.sender] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[address(0xdead)] = true;
        _isExcludedFromFee[_marketingWallet]=true;
        _isExcludedFromFee[_buybackWallet] = true;
 
        marketingWallet = _marketingWallet;
        buybackWallet = _buybackWallet;
 
        emit Transfer(address(0), msg.sender, _tTotal);
    }
 
    function name() public pure returns (string memory) {
        return _name;
    }
    function symbol() public pure returns (string memory) {
        return _symbol;
    }
    function decimals() public pure returns (uint8) {
        return _decimals;
    }
 
    function totalSupply() public view override returns (uint) {
        return _tTotal;
    }
 
    function balanceOf(address account) public view override returns (uint) {
        if (_isExcluded[account]) return _tOwned[account];
        return tokenFromReflection(_rOwned[account]);
    }
 
    function transfer(address recipient, uint amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
 
    function allowance(address owner, address spender) public view override returns (uint) {
        return _allowances[owner][spender];
    }
 
    function approve(address spender, uint amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }
 
    function transferFrom(address sender, address recipient, uint amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
 
        uint currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        _approve(sender, _msgSender(), currentAllowance - amount);
 
        return true;
    }
 
    function increaseAllowance(address spender, uint addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }
 
    function decreaseAllowance(address spender, uint subtractedValue) public virtual returns (bool) {
        uint currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        _approve(_msgSender(), spender, currentAllowance - subtractedValue);
 
        return true;
    }
 
    function isExcludedFromReward(address account) public view returns (bool) {
        return _isExcluded[account];
    }
 
    function tokenFromReflection(uint rAmount) public view returns(uint) {
        require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint currentRate =  _getRate();
        return rAmount / currentRate;
    }
 
    function excludeFromReward(address account) public onlyOwner {
        require(!_isExcluded[account], "Account is already excluded");
        if(_rOwned[account] > 0) {
            _tOwned[account] = tokenFromReflection(_rOwned[account]);
        }
        _isExcluded[account] = true;
        _excluded.push(account);
    }
 
    function includeInReward(address account) external onlyOwner {
        require(_isExcluded[account], "Account is not excluded");
        for (uint i = 0; i < _excluded.length; i++) {
            if (_excluded[i] == account) {
                _excluded[i] = _excluded[_excluded.length - 1];
                _tOwned[account] = 0;
                _isExcluded[account] = false;
                _excluded.pop();
                break;
            }
        }
    }
 
    function excludeFromFee(address account, bool status) public onlyOwner {
        _isExcludedFromFee[account] = status;
    }
 
    function isExcludedFromFee(address account) public view returns (bool) {
        return _isExcludedFromFee[account];
    }

    function buyThreshold() public view returns (uint) {
        return address(oracle) != address(0x0) ? oracle.getBuyThreshold() : staticBuyThreshold;
    }
 
    function _reflectRfi(uint rRfi, uint tRfi) private {
        _rTotal -= rRfi;
        totalRfi += tRfi;
    }
 
    function _takeSwapFees(uint rValue, uint tValue) private {
        if (_isExcluded[address(this)])
        {
            _tOwned[address(this)]+= tValue;
        }

        _rOwned[address(this)] += rValue;
    }
 
    function _getValues(uint tAmount, bool takeFee, bool isSell) private view returns (valuesFromGetValues memory to_return) {
        to_return = _getTValues(tAmount, takeFee, isSell);
        (to_return.rAmount, to_return.rTransferAmount, to_return.rRfi, to_return.rSwap) = _getRValues(to_return, tAmount, takeFee, _getRate());

        return to_return;
    }
 
    function _getTValues(uint tAmount, bool takeFee, bool isSell) private view returns (valuesFromGetValues memory s) {
        if (!takeFee) {
            s.tTransferAmount = tAmount;
            return s;
        }
 
        uint tempTax = isSell ? sellTax : buyTax;
        uint rfiTax = tempTax * taxesPercentage.rfi / 100;
        uint swapTax = tempTax * (100 - taxesPercentage.rfi) / 100;
        s.tRfi = tAmount * rfiTax / 1000;
        s.tSwap = tAmount * swapTax / 1000;
        s.tTransferAmount = tAmount - s.tRfi - s.tSwap;

        return s;
    }
 
    function _getRValues(valuesFromGetValues memory s, uint tAmount, bool takeFee, uint currentRate) private pure returns (uint rAmount, uint rTransferAmount, uint rRfi, uint rSwap) {
        rAmount = tAmount*currentRate;
 
        if (!takeFee) {
            return (rAmount, rAmount, 0, 0);
        }
 
        rRfi = s.tRfi * currentRate;
        rSwap = s.tSwap * currentRate;
        rTransferAmount = rAmount - rRfi - rSwap;

        return (rAmount, rTransferAmount, rRfi, rSwap);
    }
 
    function _getRate() private view returns (uint) {
        (uint rSupply, uint tSupply) = _getCurrentSupply();
        return rSupply / tSupply;
    }
 
    function _getCurrentSupply() private view returns (uint, uint) {
        uint rSupply = _rTotal;
        uint tSupply = _tTotal;
        for (uint i = 0; i < _excluded.length; i++) {
            if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
            rSupply = rSupply-_rOwned[_excluded[i]];
            tSupply = tSupply-_tOwned[_excluded[i]];
        }
        if (rSupply < _rTotal / _tTotal) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }
 
    function _approve(address owner, address spender, uint amount) private {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
 
    function _transfer(address from, address to, uint amount) private {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");
        require(amount <= balanceOf(from), "You are trying to transfer more than your balance");
 
        if (buyTax != 0 && tradingEnabled) {
            if (startBlock + offlineBlocks < block.number) buyTax = 0;
        }
 
        bool takeFee = false;
 
        if (!_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
            require(tradingEnabled, "Liquidity has not been added yet");
            require(amount <= maxTxAmount, "You are exceeding maxTxAmount");
            if (to != pair) require(balanceOf(to) + amount <= maxWalletAmount, "You are exceeding maxWalletAmount");

            takeFee = true;

            if (from == pair && startBlock + offlineBlocks < block.number) {
                takeFee = false;

                if (amount >= buyThreshold()) {
                    if (sellTax >= dynamicTax) sellTax -= dynamicTax;
                    else sellTax = 0;
                }
            }
        }
 
        bool canSwap = balanceOf(address(this)) >= swapThreshold;
        if (!swapping && swapEnabled && canSwap && from != pair && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
            swapTokensForFees(swapThreshold);
        }
 
        _tokenTransfer(from, to, amount, takeFee);
    }

    function _tokenTransfer(address sender, address recipient, uint tAmount, bool takeFee) private {
        bool isSell = recipient == pair ? true : false;
        valuesFromGetValues memory s = _getValues(tAmount, takeFee, isSell);
 
        if (isSell && takeFee && startBlock + offlineBlocks < block.number) {
            if (sellTax + dynamicTax > maxSellTax) sellTax = maxSellTax;
            else sellTax += dynamicTax;
        }

        if (_isExcluded[sender] ) {
            _tOwned[sender] = _tOwned[sender] - tAmount;
        }
        if (_isExcluded[recipient]) {
            _tOwned[recipient] = _tOwned[recipient] + s.tTransferAmount;
        }
 
        _rOwned[sender] = _rOwned[sender] - s.rAmount;
        _rOwned[recipient] = _rOwned[recipient] + s.rTransferAmount;
 
        if (s.rRfi > 0 || s.tRfi > 0) _reflectRfi(s.rRfi, s.tRfi);
        if (s.rSwap > 0 || s.tSwap > 0) _takeSwapFees(s.rSwap, s.tSwap);
 
        emit Transfer(sender, recipient, s.tTransferAmount);
        emit Transfer(sender, address(this), s.tSwap);
 
    }
 
    function swapTokensForFees(uint tokens) private lockTheSwap {
        uint initialBalance = address(this).balance;
        swapTokensForETH(tokens);
        uint deltaBalance = address(this).balance - initialBalance;
 
        uint totalPercent = 100 - taxesPercentage.rfi;
        if (totalPercent == 0) return;
 
        uint marketingAmount = deltaBalance * taxesPercentage.marketing / totalPercent;
        if (marketingAmount > 0) payable(marketingWallet).sendValue(marketingAmount);
 
        uint buybackAmount = deltaBalance - marketingAmount;
        if (buybackAmount > 0) payable(buybackWallet).sendValue(buybackAmount);
    }
 
    function swapTokensForETH(uint tokenAmount) private {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = router.WETH();
 
        _approve(address(this), address(router), tokenAmount);
 
        router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }
 
    function enableTrading() external onlyOwner {
        tradingEnabled = true;
        swapEnabled = true;
        startBlock = block.number;
    }

    function updateOracle(address newOracle) external onlyOwnerOrOracle {
        oracle = IDynamicThresholdOracle(newOracle);
    }
 
    function updateMarketingWallet(address newWallet) external onlyOwner {
        marketingWallet = newWallet;
        _isExcludedFromFee[marketingWallet] = true;
    }
 
    function updateBuybackWallet(address newWallet) external onlyOwner {
        buybackWallet = newWallet;
        _isExcludedFromFee[buybackWallet] = true;
    }

    function setTaxesPercentage(uint _rfi, uint _buyback, uint _marketing) external onlyOwner {
        require(_rfi + _buyback + _marketing == 100, "Total must be 100");
        taxesPercentage = TaxesPercentage(_rfi, _buyback, _marketing);
    }
 
    function updateThreshold(uint amount) external onlyOwner {
        staticBuyThreshold = amount * 10**_decimals;
    }
 
    function updateMaxTxAmount(uint amount) external onlyOwner {
        maxTxAmount = amount * 10**_decimals;
    }
 
    function updateMaxWallet(uint amount) external onlyOwner {
        maxWalletAmount = amount * 10**_decimals;
    }
 
    function updateSwapThreshold(uint amount) external onlyOwner {
        swapThreshold = amount * 10**_decimals;
    }
 
    function updateSwapEnabled(bool _enabled) external onlyOwner {
        swapEnabled = _enabled;
    }
 
    function updatePair(address newRouter, address newPair) external onlyOwner {
        router = IUniswapV2Router02(newRouter);
        pair = newPair;
    }
 
    function updateDynamicTax(uint amount) external onlyOwner {
        dynamicTax = amount;
    }
 
    function updateMaxSellTax(uint amount) external onlyOwner {
        maxSellTax = amount;
    }
 
    function rescueETH() external onlyOwner {
        payable(msg.sender).transfer(address(this).balance);
    }
 
    function rescueTokens(address _token) external onlyOwner {
        require(_token != address(this), "Can not rescue own token!");
        IERC20(_token).transfer(owner(), IERC20(_token).balanceOf(address(this)));
    }

    function distributeAirdrop(address[] calldata recipients, uint[] calldata amounts) external onlyOwner {
        require(recipients.length == amounts.length, "Error in arrays!");
        for (uint256 i = 0; i < recipients.length; i++) {
            _transfer(_msgSender(), recipients[i], amounts[i] * 10**_decimals);
        }
    }
 
    receive() external payable {}
}