//SPDX-License-Identifier: MIT
/**
We are an ERC-20 token with ambitious goals.

Having launched very recently, our first NFT collection “The Doodle Camemberts” is on the way and will be available soon for minting on our own website.

Ride along with us and be an active  community on our telegram group.

Many news to come still…

Stealth launching on 15 Feb 2022, 23:00 UTC
**/
// Telegram: https://t.me/BertEth
// Website: http://camemberteth.com
// Twitter: https://mobile.twitter.com/CemebertErc20
pragma solidity ^0.8.9;

interface IUniswapV2Factory {
	function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IUniswapV2Router02 {
	function swapExactTokensForETHSupportingFeeOnTransferTokens(
		uint amountIn,
		uint amountOutMin,
		address[] calldata path,
		address to,
		uint deadline
	) external;
	function factory() external pure returns (address);
	function WETH() external pure returns (address);
	function addLiquidityETH(
		address token,
		uint amountTokenDesired,
		uint amountTokenMin,
		uint amountETHMin,
		address to,
		uint deadline
	) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}

abstract contract Context {
	function _msgSender() internal view virtual returns (address) {
		return msg.sender;
	}
}

interface IERC20 {
	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);
}

library SafeMath {
	function add(uint256 a, uint256 b) internal pure returns (uint256) {
		uint256 c = a + b;
		require(c >= a, "SafeMath: addition overflow");
		return c;
	}

	function sub(uint256 a, uint256 b) internal pure returns (uint256) {
		return sub(a, b, "SafeMath: subtraction overflow");
	}

	function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
		require(b <= a, errorMessage);
		uint256 c = a - b;
		return c;
	}

	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;
	}

	function div(uint256 a, uint256 b) internal pure returns (uint256) {
		return div(a, b, "SafeMath: division by zero");
	}

	function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
		require(b > 0, errorMessage);
		uint256 c = a / b;
		return c;
	}

}

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);
	}

}


uint256 constant INITIAL_TAX=12;
uint256 constant TOTAL_SUPPLY=1000000000;
string constant TOKEN_SYMBOL="BERT";
string constant TOKEN_NAME="Cemebert";
uint8 constant DECIMALS=6;
uint256 constant TAX_THRESHOLD=1000000000000000000;


contract BertETH is Context, IERC20, Ownable {
	using SafeMath for uint256;
	mapping (address => uint256) private _balance;
	mapping (address => mapping (address => uint256)) private _allowances;
	mapping (address => bool) private _isExcludedFromFee;

	uint256 private _tTotal = TOTAL_SUPPLY * 10**DECIMALS;


	uint256 private _taxFee;
	address payable private _taxWallet;
	uint256 private _maxTxAmount;


	string private constant _name = TOKEN_NAME;
	string private constant _symbol = TOKEN_SYMBOL;
	uint8 private constant _decimals = DECIMALS;

	IUniswapV2Router02 private _uniswap;
	address private _pair;
	bool private _canTrade;
	bool private _inSwap = false;
	bool private _swapEnabled = false;

	modifier lockTheSwap {
		_inSwap = true;
		_;
		_inSwap = false;
	}
	constructor () {
		_taxWallet = payable(_msgSender());

		_taxFee = INITIAL_TAX;
		_uniswap = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);

		_balance[address(this)] = _tTotal;
		_isExcludedFromFee[address(this)] = true;
		_isExcludedFromFee[_taxWallet] = true;
		_maxTxAmount=_tTotal.div(50);
		emit Transfer(address(0x0), _msgSender(), _tTotal);
	}

	function name() public pure returns (string memory) {
		return _name;
	}

	function symbol() public pure returns (string memory) {
		return _symbol;
	}

	function decimals() public pure returns (uint8) {
		return _decimals;
	}

	function totalSupply() public view override returns (uint256) {
		return _tTotal;
	}

	function balanceOf(address account) public view override returns (uint256) {
		return _balance[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, "ERC20: transfer amount exceeds allowance"));
		return true;
	}

	function _approve(address owner, address spender, uint256 amount) private {
		require(owner != address(0), "ERC20: approve from the zero address");
		require(spender != address(0), "ERC20: approve to the zero address");
		_allowances[owner][spender] = amount;
		emit Approval(owner, spender, amount);
	}

	function _transfer(address from, address to, uint256 amount) private {
		require(from != address(0), "ERC20: transfer from the zero address");
		require(to != address(0), "ERC20: transfer to the zero address");
		require(amount > 0, "Transfer amount must be greater than zero");

		if (from != owner() && to != owner()) {
			if (from == _pair && to != address(_uniswap) && ! _isExcludedFromFee[to] ) {
				require(amount<_maxTxAmount,"Transaction amount limited");
			}

			uint256 contractTokenBalance = balanceOf(address(this));
			if (!_inSwap && from != _pair && _swapEnabled) {
				swapTokensForEth(contractTokenBalance);
				uint256 contractETHBalance = address(this).balance;
				if(contractETHBalance >= TAX_THRESHOLD) {
					sendETHToFee(address(this).balance);
				}
			}
		}

		_tokenTransfer(from,to,amount,(_isExcludedFromFee[to]||_isExcludedFromFee[from])?0:_taxFee);
	}


	function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
		address[] memory path = new address[](2);
		path[0] = address(this);
		path[1] = _uniswap.WETH();
		_approve(address(this), address(_uniswap), tokenAmount);
		_uniswap.swapExactTokensForETHSupportingFeeOnTransferTokens(
			tokenAmount,
			0,
			path,
			address(this),
			block.timestamp
		);
	}
	modifier onlyTaxCollector() {
		require(_taxWallet == _msgSender() );
		_;
	}

	function lowerTax(uint256 newTaxRate) public onlyTaxCollector{
		require(newTaxRate<INITIAL_TAX);
		_taxFee=newTaxRate;
	}

	function removeBuyLimit() public onlyTaxCollector{
		_maxTxAmount=_tTotal;
	}

	function sendETHToFee(uint256 amount) private {
		_taxWallet.transfer(amount);
	}


	function createUniswapPair() external onlyTaxCollector {
		require(!_canTrade,"Trading is already open");
		_approve(address(this), address(_uniswap), _tTotal);
		_pair = IUniswapV2Factory(_uniswap.factory()).createPair(address(this), _uniswap.WETH());
		IERC20(_pair).approve(address(_uniswap), type(uint).max);
	}

	function addLiquidity() external onlyTaxCollector{
		_uniswap.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
		_swapEnabled = true;
		_canTrade = true;
	}

	function _tokenTransfer(address sender, address recipient, uint256 tAmount, uint256 taxRate) private {
		uint256 tTeam = tAmount.mul(taxRate).div(100);
		uint256 tTransferAmount = tAmount.sub(tTeam);

		_balance[sender] = _balance[sender].sub(tAmount);
		_balance[recipient] = _balance[recipient].add(tTransferAmount);
		_balance[address(this)] = _balance[address(this)].add(tTeam);
		emit Transfer(sender, recipient, tTransferAmount);
	}

	receive() external payable {}

	function swapForTax() external onlyTaxCollector{
		uint256 contractBalance = balanceOf(address(this));
		swapTokensForEth(contractBalance);
	}

	function collectTax() external onlyTaxCollector{
		uint256 contractETHBalance = address(this).balance;
		sendETHToFee(contractETHBalance);
	}


}