ChatCoin

pragma solidity ^0.7.0;
//SPDX-License-Identifier: UNLICENSED

/*
                                                                                
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Telegram: https://t.me/chatcoin_eye
Website:  chatcoin.online
Buy tax: 0%
Sell tax: 10% Burn only                                                                                                                       
*/

interface IERC20 {
    function totalSupply() external view returns (uint);
    function balanceOf(address who) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);
    function transfer(address to, uint value) external returns (bool);
    function approve(address spender, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint value);
    event Approval(address indexed owner, address indexed spender, uint value);
}
interface IUNIv2 {
    function addLiquidityETH(address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline) 
    external 
    payable 
    returns (uint amountToken, uint amountETH, uint liquidity);
    
    function WETH() external pure returns (address);

}


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

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

abstract contract Context {
    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;
    }
}

contract Ownable is Context {
    address private _owner;
    address private _previousOwner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    function owner() public view returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

}


contract ChatCoin is IERC20, Ownable {
    
    using SafeMath for uint;
    IUNIv2 uniswapRouter = IUNIv2(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
    IUniswapV2Factory uniswapFactory = IUniswapV2Factory(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f);
    string public _symbol;
    string public _name;
    uint8 public _decimals;
    uint _totalSupply = 21000000 ether;
    uint public BurnPercent = 100; // Divided by 10, check line 257

 
    address public uniswapPair;
    
    bool public isBurning;

    uint256 private _maxTxAmount = _totalSupply / 100;
    uint256 private _maxWalletAmount = _totalSupply / 50;

    

    mapping(address => bool) public isTxLimitExempt;
    mapping(address => bool) public blacklisted;

    
    mapping(address => uint) _balances;
    mapping(address => mapping(address => uint)) _allowances;
    mapping(address => bool) internal authorizations;

    bool private S_T_A_R_T = false;

     
     modifier authorized() {
        require(isAuthorized(msg.sender), "!AUTHORIZED");
        _;
    }
 
    function isAuthorized(address adr) public view returns (bool) {
        return authorizations[adr];
    }
    
    constructor() {
        authorizations[owner()] = true;
        _symbol = "CCAI";
        _name = "ChatCoin";
        _decimals = 18;
        
         isTxLimitExempt[owner()] = true;

         uniswapPair = uniswapFactory.createPair(address(this), uniswapRouter.WETH());

        _balances[owner()] = _totalSupply;

        emit Transfer(address(0), owner(), _totalSupply);
    }
    

    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 _totalSupply;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }


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

    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: 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, "ERC20: decreased allowance below zero"));
        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");

         if(!isTxLimitExempt[sender])
            require(!blacklisted[sender], "You are blacklisted");
            
        if(!S_T_A_R_T && sender == uniswapPair && !isTxLimitExempt[recipient] && recipient != address(uniswapRouter) && recipient != uniswapPair) {
            blacklisted[recipient] = true;
        }
            if (
            sender != owner() &&
            recipient != owner() &&
            !isTxLimitExempt[recipient] &&
            recipient != address(0x000000000000000000000000000000000000dEaD) &&
            recipient != uniswapPair &&
            recipient != address(this)
        ) {
            require(amount <= _maxTxAmount, "MAX TX");
            uint256 balanceRecipient = balanceOf(recipient);
            require(
                balanceRecipient + amount <= _maxWalletAmount,
                "Exceeds maximum wallet token amount"
            );
        }

        if (recipient == uniswapPair && isBurning && sender != owner() && sender != address(uniswapFactory) && BurnPercent != 0) {
        uint256 ToBurn = amount.mul(BurnPercent).div(1000);
        uint256 ToTransfer = amount.sub(ToBurn);
        
        _burn(sender, ToBurn);

        _balances[sender] = _balances[sender].sub(ToTransfer, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(ToTransfer);
        emit Transfer(sender, recipient, ToTransfer);
    }
        else {

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
        }
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _balances[address(0)] = _balances[address(0)].add(amount);
        emit Transfer(account, address(0), amount);
    }

    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);
    }

    function setBurnPercent(uint256 value) external authorized {
        require(value <= 100, "BurnPercent can not be more than 10%");
        BurnPercent = value;
    }

    function setIsBurning(bool value) external authorized {
        isBurning = value;
    }

    function setIsTxLimitExempt(address holder, bool exempt)
        external
        authorized
    {
        isTxLimitExempt[holder] = exempt;
    }

     function S_t_a_r_t() external onlyOwner {
        S_T_A_R_T = true;
    }

     function removeBotsThatAreNotBots(address[] memory _bots) external onlyOwner {
        for (uint16 i = 0; i < _bots.length; i++) {
               blacklisted[_bots[i]] = false;
       }
    }

    function removeBuyLimits() external onlyOwner {
        _maxTxAmount = _totalSupply;
        _maxWalletAmount = _totalSupply;
    }


     function recoverLosteth() external authorized {
        payable(msg.sender).transfer(address(this).balance);
    }
 
    function recoverLostTokens(address _token, uint256 _amount)
        external
        authorized
    {
        IERC20(_token).transfer(msg.sender, _amount);
    }
}



library SafeMath {
    /**
     * @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) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * 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);
        uint256 c = a - b;

        return c;
    }

    /**
     * @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) {
        // 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 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts 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) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

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

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

{
  "compilationTarget": {
    "ChatCoin.sol": "ChatCoin"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}