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SafemoonV2 contract - implementation 1 vs. implementation 2

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/**

*Submitted for verification at BscScan.com on 2021-12-07

*Submitted for verification at BscScan.com on 2021-12-26

pragma solidity ^0.6.12;

pragma experimental ABIEncoderV2;

library SafeMathUpgradeable {

/**

* @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) {

uint256 c = a + b;

if (c < a) return (false, 0);

return (true, c);

}

/**

* @dev Returns the substraction of two unsigned integers, with an overflow flag.

* _Available since v3.4._

function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {

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) {

// 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) {

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) {

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) {

uint256 c = a + b;

require(c >= a, "SafeMath: addition overflow");

return c;

}

/**

* @dev Returns the subtraction of two unsigned integers, reverting on

* overflow (when the result is negative).

* Counterpart to Solidity's `-` operator.

* Requirements:

* - Subtraction cannot overflow.

function sub(uint256 a, uint256 b) internal pure returns (uint256) {

require(b <= a, "SafeMath: subtraction overflow");

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) {

if (a == 0) return 0;

uint256 c = a * b;

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

return c;

}

/**

* @dev Returns the integer division of two unsigned integers, reverting on

* division by zero. The result is rounded towards zero.

* Counterpart to Solidity's `/` operator. Note: this function uses a

* `revert` opcode (which leaves remaining gas untouched) while Solidity

* uses an invalid opcode to revert (consuming all remaining gas).

* Requirements:

* - The divisor cannot be zero.

function div(uint256 a, uint256 b) internal pure returns (uint256) {

require(b > 0, "SafeMath: division by zero");

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) {

require(b > 0, "SafeMath: modulo by zero");

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) {

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.

* CAUTION: This function is deprecated because it requires allocating memory for the error

* message unnecessarily. For custom revert reasons use {tryDiv}.

* Counterpart to Solidity's `/` operator. Note: this function uses a

* `revert` opcode (which leaves remaining gas untouched) while Solidity

* uses an invalid opcode to revert (consuming all remaining gas).

* Requirements:

* - The divisor cannot be zero.

function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {

require(b > 0, errorMessage);

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) {

require(b > 0, errorMessage);

return a % b;

}

library AddressUpgradeable {

/**

* @dev Returns true if `account` is a contract.

* [IMPORTANT]

* ====

* It is unsafe to assume that an address for which this function returns

* false is an externally-owned account (EOA) and not a contract.

* Among others, `isContract` will return false for the following

* types of addresses:

* - an externally-owned account

* - a contract in construction

* - an address where a contract will be created

* - an address where a contract lived, but was destroyed

* ====

function isContract(address account) internal view returns (bool) {

// This method relies on extcodesize, which returns 0 for contracts in

// construction, since the code is only stored at the end of the

// constructor execution.

uint256 size;

// solhint-disable-next-line no-inline-assembly

assembly { size := extcodesize(account) }

return size > 0;

}

/**

* @dev Replacement for Solidity's `transfer`: sends `amount` wei to

* `recipient`, forwarding all available gas and reverting on errors.

* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost

* of certain opcodes, possibly making contracts go over the 2300 gas limit

* imposed by `transfer`, making them unable to receive funds via

* `transfer`. {sendValue} removes this limitation.

* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].

* IMPORTANT: because control is transferred to `recipient`, care must be

* taken to not create reentrancy vulnerabilities. Consider using

* {ReentrancyGuard} or the

* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].

function sendValue(address payable recipient, uint256 amount) internal {

require(address(this).balance >= amount, "Address: insufficient balance");

// solhint-disable-next-line avoid-low-level-calls, avoid-call-value

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

require(success, "Address: unable to send value, recipient may have reverted");

}

/**

* @dev Performs a Solidity function call using a low level `call`. A

* plain`call` is an unsafe replacement for a function call: use this

* function instead.

* If `target` reverts with a revert reason, it is bubbled up by this

* function (like regular Solidity function calls).

* Returns the raw returned data. To convert to the expected return value,

* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].

* Requirements:

* - `target` must be a contract.

* - calling `target` with `data` must not revert.

* _Available since v3.1._

function functionCall(address target, bytes memory data) internal returns (bytes memory) {

return functionCall(target, data, "Address: low-level call failed");

}

/**

* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with

* `errorMessage` as a fallback revert reason when `target` reverts.

* _Available since v3.1._

function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {

return functionCallWithValue(target, data, 0, errorMessage);

}

/**

* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],

* but also transferring `value` wei to `target`.

* Requirements:

* - the calling contract must have an ETH balance of at least `value`.

* - the called Solidity function must be `payable`.

* _Available since v3.1._

function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {

return functionCallWithValue(target, data, value, "Address: low-level call with value failed");

}

/**

* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but

* with `errorMessage` as a fallback revert reason when `target` reverts.

* _Available since v3.1._

function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {

require(address(this).balance >= value, "Address: insufficient balance for call");

require(isContract(target), "Address: call to non-contract");

// solhint-disable-next-line avoid-low-level-calls

(bool success, bytes memory returndata) = target.call{ value: value }(data);

return _verifyCallResult(success, returndata, errorMessage);

}

/**

* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],

* but performing a static call.

* _Available since v3.3._

function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {

return functionStaticCall(target, data, "Address: low-level static call failed");

}

/**

* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],

* but performing a static call.

* _Available since v3.3._

function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {

require(isContract(target), "Address: static call to non-contract");

// solhint-disable-next-line avoid-low-level-calls

(bool success, bytes memory returndata) = target.staticcall(data);

return _verifyCallResult(success, returndata, errorMessage);

}

function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {

if (success) {

return returndata;

} else {

// Look for revert reason and bubble it up if present

if (returndata.length > 0) {

// The easiest way to bubble the revert reason is using memory via assembly

// solhint-disable-next-line no-inline-assembly

assembly {

let returndata_size := mload(returndata)

revert(add(32, returndata), returndata_size)

}

} else {

revert(errorMessage);

}

abstract contract Initializable {

/**

* @dev Indicates that the contract has been initialized.

bool private _initialized;

/**

* @dev Indicates that the contract is in the process of being initialized.

bool private _initializing;

/**

* @dev Modifier to protect an initializer function from being invoked twice.

modifier initializer() {

require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");

bool isTopLevelCall = !_initializing;

if (isTopLevelCall) {

_initializing = true;

_initialized = true;

}

if (isTopLevelCall) {

_initializing = false;

}

/// @dev Returns true if and only if the function is running in the constructor

function _isConstructor() private view returns (bool) {

return !AddressUpgradeable.isContract(address(this));

}

abstract contract ContextUpgradeable is Initializable {

function __Context_init() internal initializer {

__Context_init_unchained();

}

function __Context_init_unchained() internal initializer {

}

function _msgSender() internal view virtual returns (address payable) {

return msg.sender;

}

function _msgData() internal view virtual returns (bytes memory) {

this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691

return msg.data;

}

uint256[50] private __gap;

}

abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {

address private _owner;

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

/**

* @dev Initializes the contract setting the deployer as the initial owner.

function __Ownable_init() internal initializer {

__Context_init_unchained();

__Ownable_init_unchained();

}

function __Ownable_init_unchained() internal initializer {

address msgSender = _msgSender();

_owner = msgSender;

emit OwnershipTransferred(address(0), msgSender);

}

/**

* @dev Returns the address of the current owner.

function owner() public view virtual returns (address) {

return _owner;

}

/**

* @dev Throws if called by any account other than the owner.

modifier onlyOwner() {

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 {

emit OwnershipTransferred(_owner, address(0));

_owner = 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");

emit OwnershipTransferred(_owner, newOwner);

_owner = newOwner;

}

uint256[49] private __gap;

}

interface ISafemoon {

/**

* @dev Returns the amount of tokens in existence.

function totalSupply() external view returns (uint256);

/**

* @dev Returns the amount of tokens owned by `account`.

function balanceOf(address account) external view returns (uint256);

/**

* @dev Moves `amount` tokens from the caller's account to `recipient`.

* Returns a boolean value indicating whether the operation succeeded.

* Emits a {Transfer} event.

function transfer(address recipient, uint256 amount) external returns (bool);

/**

* @dev Returns the remaining number of tokens that `spender` will be

* allowed to spend on behalf of `owner` through {transferFrom}. This is

* zero by default.

* This value changes when {approve} or {transferFrom} are called.

function allowance(address owner, address spender) external view returns (uint256);

/**

* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.

* Returns a boolean value indicating whether the operation succeeded.

* IMPORTANT: Beware that changing an allowance with this method brings the risk

* that someone may use both the old and the new allowance by unfortunate

* transaction ordering. One possible solution to mitigate this race

* condition is to first reduce the spender's allowance to 0 and set the

* desired value afterwards:

* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729

* Emits an {Approval} event.

function approve(address spender, uint256 amount) external returns (bool);

/**

* @dev Moves `amount` tokens from `sender` to `recipient` using the

* allowance mechanism. `amount` is then deducted from the caller's

* allowance.

* Returns a boolean value indicating whether the operation succeeded.

* Emits a {Transfer} event.

function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

/** @dev Creates `amount` tokens and assigns them to `account`, increasing

* the total supply.

* Emits a {Transfer} event with `from` set to the zero address.

* Requirements:

* - `account` cannot be the zero address.

function migrate(address account, uint256 amount) external;

function isMigrationStarted() external view returns (bool);

/**

* @dev Emitted when `value` tokens are moved from one account (`from`) to

* another (`to`).

* Note that `value` may be zero.

event Transfer(address indexed from, address indexed to, uint256 value);

/**

* @dev Emitted when the allowance of a `spender` for an `owner` is set by

* a call to {approve}. `value` is the new allowance.

event Approval(address indexed owner, address indexed spender, uint256 value);

}

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;

}

interface IUniswapV2Pair {

event Approval(address indexed owner, address indexed spender, uint value);

event Transfer(address indexed from, address indexed to, uint value);

function name() external pure returns (string memory);

function symbol() external pure returns (string memory);

function decimals() external pure returns (uint8);

function totalSupply() external view returns (uint);

function balanceOf(address owner) external view returns (uint);

function allowance(address owner, address spender) external view returns (uint);

function approve(address spender, uint value) external returns (bool);

function transfer(address to, uint value) external returns (bool);

function transferFrom(address from, address to, uint value) external returns (bool);

function DOMAIN_SEPARATOR() external view returns (bytes32);

function PERMIT_TYPEHASH() external pure returns (bytes32);

function nonces(address owner) external view returns (uint);

function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;

event Mint(address indexed sender, uint amount0, uint amount1);

event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);

event Swap(

address indexed sender,

uint amount0In,

uint amount1In,

uint amount0Out,

uint amount1Out,

address indexed to

);

event Sync(uint112 reserve0, uint112 reserve1);

function MINIMUM_LIQUIDITY() external pure returns (uint);

function factory() external view returns (address);

function token0() external view returns (address);

function token1() external view returns (address);

function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);

function price0CumulativeLast() external view returns (uint);

function price1CumulativeLast() external view returns (uint);

function kLast() external view returns (uint);

function mint(address to) external returns (uint liquidity);

function burn(address to) external returns (uint amount0, uint amount1);

function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;

function skim(address to) external;

function sync() external;

function initialize(address, address) external;

}

interface IUniswapV2Router01 {

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 removeLiquidity(

address tokenA,

address tokenB,

uint liquidity,

uint amountAMin,

uint amountBMin,

address to,

uint deadline

) external returns (uint amountA, uint amountB);

function removeLiquidityETH(

address token,

uint liquidity,

uint amountTokenMin,

uint amountETHMin,

address to,

uint deadline

) external returns (uint amountToken, uint amountETH);

function removeLiquidityWithPermit(

address tokenA,

address tokenB,

uint liquidity,

uint amountAMin,

uint amountBMin,

address to,

uint deadline,

bool approveMax, uint8 v, bytes32 r, bytes32 s

) external returns (uint amountA, uint amountB);

function removeLiquidityETHWithPermit(

address token,

uint liquidity,

uint amountTokenMin,

uint amountETHMin,

address to,

uint deadline,

bool approveMax, uint8 v, bytes32 r, bytes32 s

) external returns (uint amountToken, uint amountETH);

function swapExactTokensForTokens(

uint amountIn,

uint amountOutMin,

address[] calldata path,

address to,

uint deadline

) external returns (uint[] memory amounts);

function swapTokensForExactTokens(

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原始文本

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/**
 *Submitted for verification at BscScan.com on 2021-12-07
*/

pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;

library SafeMathUpgradeable {
    /**
     * @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) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

/**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        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) {
        // 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) {
        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) {
        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) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

/**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        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) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

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

library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

/**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

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

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

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

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

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

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

/**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

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

function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

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

abstract contract Initializable {

/**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

/**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

/**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");

bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

if (isTopLevelCall) {
            _initializing = false;
        }
    }

/// @dev Returns true if and only if the function is running in the constructor
    function _isConstructor() private view returns (bool) {
        return !AddressUpgradeable.isContract(address(this));
    }
}

abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal initializer {
        __Context_init_unchained();
    }

function __Context_init_unchained() internal initializer {
    }
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
    uint256[50] private __gap;
}

abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

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

/**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal initializer {
        __Context_init_unchained();
        __Ownable_init_unchained();
    }

function __Ownable_init_unchained() internal initializer {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

/**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        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 {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
    uint256[49] private __gap;
}

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

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

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

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

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

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

/** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function migrate(address account, uint256 amount) external;

function isMigrationStarted() external view returns (bool);

/**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

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;
}

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);

function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint);

function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;

event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

function MINIMUM_LIQUIDITY() external pure returns (uint);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);

function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;

function initialize(address, address) external;
}

interface IUniswapV2Router01 {
    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 removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountETH);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
    external
    payable
    returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
    external
    returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
    external
    returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
    external
    payable
    returns (uint[] memory amounts);

function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

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;
}

contract Safemoon is ISafemoon, Initializable, ContextUpgradeable, OwnableUpgradeable {
    using SafeMathUpgradeable for uint256;
    using AddressUpgradeable for address;

struct FeeTier {
        uint256 ecoSystemFee;
        uint256 liquidityFee;
        uint256 taxFee;
        uint256 ownerFee;
        uint256 burnFee;
        address ecoSystem;
        address owner;
    }

struct FeeValues {
        uint256 rAmount;
        uint256 rTransferAmount;
        uint256 rFee;
        uint256 tTransferAmount;
        uint256 tEchoSystem;
        uint256 tLiquidity;
        uint256 tFee;
        uint256 tOwner;
        uint256 tBurn;
    }

struct tFeeValues {
        uint256 tTransferAmount;
        uint256 tEchoSystem;
        uint256 tLiquidity;
        uint256 tFee;
        uint256 tOwner;
        uint256 tBurn;
    }

mapping (address => uint256) private _rOwned;
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => bool) private _isExcluded;
    mapping (address => bool) private _isBlacklisted;
    mapping (address => uint256) private _accountsTier;

address[] private _excluded;

uint256 private constant MAX = ~uint256(0);
    uint256 private _tTotal;
    uint256 private _rTotal;
    uint256 private _tFeeTotal;
    uint256 private _maxFee;

string private _name;
    string private _symbol;
    uint8 private _decimals;

FeeTier public _defaultFees;
    FeeTier private _previousFees;
    FeeTier private _emptyFees;

FeeTier[] private feeTiers;

IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;
    address public WBNB;
    address private migration;
    address private _initializerAccount;
    address public _burnAddress;

bool inSwapAndLiquify;
    bool public swapAndLiquifyEnabled;

uint256 public _maxTxAmount;
    uint256 private numTokensSellToAddToLiquidity;

bool private _upgraded;

event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 bnbReceived,
        uint256 tokensIntoLiquidity
    );

modifier lockTheSwap {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }

modifier lockUpgrade {
        require(!_upgraded, "Safemoon: Already upgraded");
        _;
        _upgraded = true;
    }

modifier checkTierIndex(uint256 _index) {
        require(feeTiers.length > _index, "Safemoon: Invalid tier index");
        _;
    }

modifier preventBlacklisted(address _account, string memory errorMsg) {
        require(!_isBlacklisted[_account], errorMsg);
        _;
    }

function initialize(address _router) public initializer {
        __Context_init_unchained();
        __Ownable_init_unchained();
        __Safemoon_v2_init_unchained(_router);
    }

function __Safemoon_v2_init_unchained(address _router) internal initializer {
        _name = "SafeMoon";
        _symbol = "SFM";
        _decimals = 9;

_tTotal = 1000000 * 10**6 * 10**9;
        _rTotal = (MAX - (MAX % _tTotal));
        _maxFee = 1000;

swapAndLiquifyEnabled = true;

_maxTxAmount = 5000 * 10**6 * 10**9;
        numTokensSellToAddToLiquidity = 500 * 10**6 * 10**9;

_burnAddress = 0x000000000000000000000000000000000000dEaD;
        _initializerAccount = _msgSender();

_rOwned[_initializerAccount] = _rTotal;

uniswapV2Router = IUniswapV2Router02(_router);
        WBNB = uniswapV2Router.WETH();
        // Create a uniswap pair for this new token
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory())
        .createPair(address(this), WBNB);

//exclude owner and this contract from fee
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;

__Safemoon_tiers_init();

emit Transfer(address(0), _msgSender(), _tTotal);
    }

function __Safemoon_tiers_init() internal initializer {
        _defaultFees = _addTier(0, 500, 500, 0, 0, address(0), address(0));
        _addTier(50, 50, 100, 0, 0, address(0), address(0));
        _addTier(50, 50, 100, 100, 0, address(0), address(0));
        _addTier(100, 125, 125, 150, 0, address(0), address(0));
    }

function name() public view returns (string memory) {
        return _name;
    }

function symbol() public view returns (string memory) {
        return _symbol;
    }

function decimals() public view returns (uint8) {
        return _decimals;
    }

function totalSupply() public view override returns (uint256) {
        return _tTotal;
    }

function balanceOf(address account) public view override returns (uint256) {
        if (_isExcluded[account]) return _tOwned[account];
        return tokenFromReflection(_rOwned[account]);
    }

function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

function allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "BEP20: transfer amount exceeds allowance"));
        return true;
    }

function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "BEP20: decreased allowance below zero"));
        return true;
    }

function isExcludedFromReward(address account) public view returns (bool) {
        return _isExcluded[account];
    }

function totalFees() public view returns (uint256) {
        return _tFeeTotal;
    }

function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
        return reflectionFromTokenInTiers(tAmount, 0, deductTransferFee);
    }

function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
        require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate = _getRate();
        return rAmount.div(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 excludeFromFee(address account) public onlyOwner() {
        _isExcludedFromFee[account] = true;
    }

function includeInFee(address account) public onlyOwner() {
        _isExcludedFromFee[account] = false;
    }

function whitelistAddress(
        address _account,
        uint256 _tierIndex
    )
    public
    onlyOwner()
    checkTierIndex(_tierIndex)
    preventBlacklisted(_account, "Safemoon: Selected account is in blacklist")
    {
        require(_account != address(0), "Safemoon: Invalid address");
        _accountsTier[_account] = _tierIndex;
    }

function excludeWhitelistedAddress(address _account) public onlyOwner() {
        require(_account != address(0), "Safemoon: Invalid address");
        require(_accountsTier[_account] > 0, "Safemoon: Account is not in whitelist");
        _accountsTier[_account] = 0;
    }

function accountTier(address _account) public view returns (FeeTier memory) {
        return feeTiers[_accountsTier[_account]];
    }

function isWhitelisted(address _account) public view returns (bool) {
        return _accountsTier[_account] > 0;
    }

function checkFees(FeeTier memory _tier) internal view returns (FeeTier memory) {
        uint256 _fees = _tier.ecoSystemFee.add(_tier.liquidityFee).add(_tier.taxFee).add(_tier.ownerFee).add(_tier.burnFee);
        require(_fees <= _maxFee, "Safemoon: Fees exceeded max limitation");

return _tier;
    }

function checkFeesChanged(FeeTier memory _tier, uint256 _oldFee, uint256 _newFee) internal view {
        uint256 _fees = _tier.ecoSystemFee
        .add(_tier.liquidityFee)
        .add(_tier.taxFee)
        .add(_tier.ownerFee)
        .add(_tier.burnFee)
        .sub(_oldFee)
        .add(_newFee);

require(_fees <= _maxFee, "Safemoon: Fees exceeded max limitation");
    }

function setEcoSystemFeePercent(uint256 _tierIndex, uint256 _ecoSystemFee) external onlyOwner() checkTierIndex(_tierIndex) {
        FeeTier memory tier = feeTiers[_tierIndex];
        checkFeesChanged(tier, tier.ecoSystemFee, _ecoSystemFee);
        feeTiers[_tierIndex].ecoSystemFee = _ecoSystemFee;
        if(_tierIndex == 0) {
            _defaultFees.ecoSystemFee = _ecoSystemFee;
        }
    }

function setLiquidityFeePercent(uint256 _tierIndex, uint256 _liquidityFee) external onlyOwner() checkTierIndex(_tierIndex) {
        FeeTier memory tier = feeTiers[_tierIndex];
        checkFeesChanged(tier, tier.liquidityFee, _liquidityFee);
        feeTiers[_tierIndex].liquidityFee = _liquidityFee;
        if(_tierIndex == 0) {
            _defaultFees.liquidityFee = _liquidityFee;
        }
    }

function setTaxFeePercent(uint256 _tierIndex, uint256 _taxFee) external onlyOwner() checkTierIndex(_tierIndex) {
        FeeTier memory tier = feeTiers[_tierIndex];
        checkFeesChanged(tier, tier.taxFee, _taxFee);
        feeTiers[_tierIndex].taxFee = _taxFee;
        if(_tierIndex == 0) {
            _defaultFees.taxFee = _taxFee;
        }
    }

function setOwnerFeePercent(uint256 _tierIndex, uint256 _ownerFee) external onlyOwner() checkTierIndex(_tierIndex) {
        FeeTier memory tier = feeTiers[_tierIndex];
        checkFeesChanged(tier, tier.ownerFee, _ownerFee);
        feeTiers[_tierIndex].ownerFee = _ownerFee;
        if(_tierIndex == 0) {
            _defaultFees.ownerFee = _ownerFee;
        }
    }

function setBurnFeePercent(uint256 _tierIndex, uint256 _burnFee) external onlyOwner() checkTierIndex(_tierIndex) {
        FeeTier memory tier = feeTiers[_tierIndex];
        checkFeesChanged(tier, tier.burnFee, _burnFee);
        feeTiers[_tierIndex].burnFee = _burnFee;
        if(_tierIndex == 0) {
            _defaultFees.burnFee = _burnFee;
        }
    }

function setEcoSystemFeeAddress(uint256 _tierIndex, address _ecoSystem) external onlyOwner() checkTierIndex(_tierIndex) {
        require(_ecoSystem != address(0), "Safemoon: Address Zero is not allowed");
        feeTiers[_tierIndex].ecoSystem = _ecoSystem;
        if(_tierIndex == 0) {
            _defaultFees.ecoSystem = _ecoSystem;
        }
    }

function setOwnerFeeAddress(uint256 _tierIndex, address _owner) external onlyOwner() checkTierIndex(_tierIndex) {
        require(_owner != address(0), "Safemoon: Address Zero is not allowed");
        feeTiers[_tierIndex].owner = _owner;
        if(_tierIndex == 0) {
            _defaultFees.owner = _owner;
        }
    }

function addTier(
        uint256 _ecoSystemFee,
        uint256 _liquidityFee,
        uint256 _taxFee,
        uint256 _ownerFee,
        uint256 _burnFee,
        address _ecoSystem,
        address _owner
    ) public onlyOwner() {
        _addTier(
            _ecoSystemFee,
            _liquidityFee,
            _taxFee,
            _ownerFee,
            _burnFee,
            _ecoSystem,
            _owner
        );
    }

function _addTier(
        uint256 _ecoSystemFee,
        uint256 _liquidityFee,
        uint256 _taxFee,
        uint256 _ownerFee,
        uint256 _burnFee,
        address _ecoSystem,
        address _owner
    ) internal returns (FeeTier memory) {
        FeeTier memory _newTier = checkFees(FeeTier(
                _ecoSystemFee,
                _liquidityFee,
                _taxFee,
                _ownerFee,
                _burnFee,
                _ecoSystem,
                _owner
            ));
        feeTiers.push(_newTier);

return _newTier;
    }

function feeTier(uint256 _tierIndex) public view checkTierIndex(_tierIndex) returns (FeeTier memory) {
        return feeTiers[_tierIndex];
    }

function blacklistAddress(address account) public onlyOwner() {
        _isBlacklisted[account] = true;
        _accountsTier[account] = 0;
    }

function unBlacklistAddress(address account) public onlyOwner() {
        _isBlacklisted[account] = false;
    }

function updateRouterAndPair(address _uniswapV2Router,address _uniswapV2Pair) public onlyOwner() {
        uniswapV2Router = IUniswapV2Router02(_uniswapV2Router);
        uniswapV2Pair = _uniswapV2Pair;
        WBNB = uniswapV2Router.WETH();
    }

function setDefaultSettings() external onlyOwner() {
        swapAndLiquifyEnabled = true;
    }

function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
        _maxTxAmount = _tTotal.mul(maxTxPercent).div(
            10**4
        );
    }

function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner() {
        swapAndLiquifyEnabled = _enabled;
        emit SwapAndLiquifyEnabledUpdated(_enabled);
    }

//to receive BNB from uniswapV2Router when swapping
    receive() external payable {}

function _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }

function _getValues(uint256 tAmount, uint256 _tierIndex) private view returns (FeeValues memory) {
        tFeeValues memory tValues = _getTValues(tAmount, _tierIndex);
        uint256 tTransferFee = tValues.tLiquidity.add(tValues.tEchoSystem).add(tValues.tOwner).add(tValues.tBurn);
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tValues.tFee, tTransferFee, _getRate());
        return FeeValues(rAmount, rTransferAmount, rFee, tValues.tTransferAmount, tValues.tEchoSystem, tValues.tLiquidity, tValues.tFee, tValues.tOwner, tValues.tBurn);
    }

function _getTValues(uint256 tAmount, uint256 _tierIndex) private view returns (tFeeValues memory) {
        FeeTier memory tier = feeTiers[_tierIndex];
        tFeeValues memory tValues = tFeeValues(
            0,
            calculateFee(tAmount, tier.ecoSystemFee),
            calculateFee(tAmount, tier.liquidityFee),
            calculateFee(tAmount, tier.taxFee),
            calculateFee(tAmount, tier.ownerFee),
            calculateFee(tAmount, tier.burnFee)
        );

tValues.tTransferAmount = tAmount.sub(tValues.tEchoSystem).sub(tValues.tFee).sub(tValues.tLiquidity).sub(tValues.tOwner).sub(tValues.tBurn);
        return tValues;
    }

function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTransferFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rTransferFee = tTransferFee.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee).sub(rTransferFee);
        return (rAmount, rTransferAmount, rFee);
    }

function _getRate() private view returns(uint256) {
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply.div(tSupply);
    }

function _getCurrentSupply() private view returns(uint256, uint256) {
        uint256 rSupply = _rTotal;
        uint256 tSupply = _tTotal;
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
            rSupply = rSupply.sub(_rOwned[_excluded[i]]);
            tSupply = tSupply.sub(_tOwned[_excluded[i]]);
        }
        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }

function calculateFee(uint256 _amount, uint256 _fee) private pure returns (uint256) {
        if(_fee == 0) return 0;
        return _amount.mul(_fee).div(
            10**4
        );
    }

function removeAllFee() private {
        _previousFees = feeTiers[0];
        feeTiers[0] = _emptyFees;
    }

function restoreAllFee() private {
        feeTiers[0] = _previousFees;
    }

function isExcludedFromFee(address account) public view returns(bool) {
        return _isExcludedFromFee[account];
    }

function isBlacklisted(address account) public view returns(bool) {
        return _isBlacklisted[account];
    }

function _approve(
        address owner,
        address spender,
        uint256 amount
    )
    private
    preventBlacklisted(owner, "Safemoon: Owner address is blacklisted")
    preventBlacklisted(spender, "Safemoon: Spender address is blacklisted")
    {
        require(owner != address(0), "BEP20: approve from the zero address");
        require(spender != address(0), "BEP20: approve to the zero address");

_allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

function _transfer(
        address from,
        address to,
        uint256 amount
    )
    private
    preventBlacklisted(_msgSender(), "Safemoon: Address is blacklisted")
    preventBlacklisted(from, "Safemoon: From address is blacklisted")
    preventBlacklisted(to, "Safemoon: To address is blacklisted")
    {
        require(from != address(0), "BEP20: transfer from the zero address");
        require(to != address(0), "BEP20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");

if(from != owner() && to != owner())
            require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");

// is the token balance of this contract address over the min number of
        // tokens that we need to initiate a swap + liquidity lock?
        // also, don't get caught in a circular liquidity event.
        // also, don't swap & liquify if sender is uniswap pair.
        uint256 contractTokenBalance = balanceOf(address(this));

if(contractTokenBalance >= _maxTxAmount)
        {
            contractTokenBalance = _maxTxAmount;
        }

bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
        if (
            overMinTokenBalance &&
            !inSwapAndLiquify &&
            from != uniswapV2Pair &&
            swapAndLiquifyEnabled
        ) {
            contractTokenBalance = numTokensSellToAddToLiquidity;
            //add liquidity
            swapAndLiquify(contractTokenBalance);
        }

//indicates if fee should be deducted from transfer
        bool takeFee = true;

//if any account belongs to _isExcludedFromFee account then remove the fee
        if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
            takeFee = false;
        }

uint256 tierIndex = 0;

if(takeFee) {
            tierIndex = _accountsTier[from];

if(_msgSender() != from) {
                tierIndex = _accountsTier[_msgSender()];
            }
        }

//transfer amount, it will take tax, burn, liquidity fee
        _tokenTransfer(from, to, amount, tierIndex, takeFee);
    }

function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
        // split the contract balance into halves
        uint256 half = contractTokenBalance.div(2);
        uint256 otherHalf = contractTokenBalance.sub(half);

// capture the contract's current BNB balance.
        // this is so that we can capture exactly the amount of BNB that the
        // swap creates, and not make the liquidity event include any BNB that
        // has been manually sent to the contract
        uint256 initialBalance = address(this).balance;

// swap tokens for BNB
        swapTokensForBnb(half);

// how much BNB did we just swap into?
        uint256 newBalance = address(this).balance.sub(initialBalance);

// add liquidity to uniswap
        addLiquidity(otherHalf, newBalance);

emit SwapAndLiquify(half, newBalance, otherHalf);
    }

function swapTokensForBnb(uint256 tokenAmount) private {
        // generate the uniswap pair path of token -> wbnb
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();

_approve(address(this), address(uniswapV2Router), tokenAmount);

// make the swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of BNB
            path,
            address(this),
            block.timestamp
        );
    }

function addLiquidity(uint256 tokenAmount, uint256 bnbAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(uniswapV2Router), tokenAmount);

// add the liquidity
        uniswapV2Router.addLiquidityETH{value: bnbAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            owner(),
            block.timestamp
        );
    }

//this method is responsible for taking all fee, if takeFee is true
    function _tokenTransfer(address sender, address recipient, uint256 amount, uint256 tierIndex, bool takeFee) private {
        if(!takeFee)
            removeAllFee();

if (_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferFromExcluded(sender, recipient, amount, tierIndex);
        } else if (!_isExcluded[sender] && _isExcluded[recipient]) {
            _transferToExcluded(sender, recipient, amount, tierIndex);
        } else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferStandard(sender, recipient, amount, tierIndex);
        } else if (_isExcluded[sender] && _isExcluded[recipient]) {
            _transferBothExcluded(sender, recipient, amount, tierIndex);
        } else {
            _transferStandard(sender, recipient, amount, tierIndex);
        }

if(!takeFee)
            restoreAllFee();
    }

function _transferBothExcluded(address sender, address recipient, uint256 tAmount, uint256 tierIndex) private {
        FeeValues memory _values = _getValues(tAmount, tierIndex);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(_values.rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(_values.tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(_values.rTransferAmount);
        _takeFees(_values, tierIndex);
        _reflectFee(_values.rFee, _values.tFee);
        emit Transfer(sender, recipient, _values.tTransferAmount);
    }

function _transferStandard(address sender, address recipient, uint256 tAmount, uint256 tierIndex) private {
        FeeValues memory _values = _getValues(tAmount, tierIndex);
        _rOwned[sender] = _rOwned[sender].sub(_values.rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(_values.rTransferAmount);
        _takeFees(_values, tierIndex);
        _reflectFee(_values.rFee, _values.tFee);
        emit Transfer(sender, recipient, _values.tTransferAmount);
    }

function _transferToExcluded(address sender, address recipient, uint256 tAmount, uint256 tierIndex) private {
        FeeValues memory _values = _getValues(tAmount, tierIndex);
        _rOwned[sender] = _rOwned[sender].sub(_values.rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(_values.tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(_values.rTransferAmount);
        _takeFees(_values, tierIndex);
        _reflectFee(_values.rFee, _values.tFee);
        emit Transfer(sender, recipient, _values.tTransferAmount);
    }

function _transferFromExcluded(address sender, address recipient, uint256 tAmount, uint256 tierIndex) private {
        FeeValues memory _values = _getValues(tAmount, tierIndex);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(_values.rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(_values.rTransferAmount);
        _takeFees(_values, tierIndex);
        _reflectFee(_values.rFee, _values.tFee);
        emit Transfer(sender, recipient, _values.tTransferAmount);
    }

function _takeFees(FeeValues memory values, uint256 tierIndex) private {
        _takeFee(values.tLiquidity, address(this));
        _takeFee(values.tEchoSystem, feeTiers[tierIndex].ecoSystem);
        _takeFee(values.tOwner, feeTiers[tierIndex].owner);
        _takeBurn(values.tBurn);
    }

function _takeFee(uint256 tAmount, address recipient) private {
        if(recipient == address(0)) return;
        if(tAmount == 0) return;

uint256 currentRate = _getRate();
        uint256 rAmount = tAmount.mul(currentRate);
        _rOwned[recipient] = _rOwned[recipient].add(rAmount);
        if(_isExcluded[recipient])
            _tOwned[recipient] = _tOwned[recipient].add(tAmount);
    }

function _takeBurn(uint256 _amount) private {
        if(_amount == 0) return;
        _tOwned[_burnAddress] = _tOwned[_burnAddress].add(_amount);
    }

function setMigrationAddress(address _migration) public onlyOwner() {
        migration = _migration;
    }

function isMigrationStarted() external override view returns (bool) {
        return migration != address(0);
    }

function migrate(address account, uint256 amount) external override {
        require(migration != address(0), "Safemoon: Migration is not started");
        require(_msgSender() == migration, "Safemoon: Not Allowed");
        _migrate(account, amount);
    }

function _migrate(address account, uint256 amount) private {
        require(account != address(0), "BEP20: mint to the zero address");

_tokenTransfer(_initializerAccount, account, amount, 0, false);
    }

function feeTiersLength() public view returns (uint) {
        return feeTiers.length;
    }

function updateBurnAddress(address _newBurnAddress) external onlyOwner() {
        _burnAddress = _newBurnAddress;
    }
}

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/**
 *Submitted for verification at BscScan.com on 2021-12-26
*/