//SPDX-License-Identifier: None

pragma solidity ^0.8.5;

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) {
// Solidity only automatically asserts when dividing by 0
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;
}
}

/**
* BEP20 standard interface.
*/
interface IBEP20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function getOwner() external view returns (address);
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);
}


/**
* Allows for contract ownership along with multi-address authorization
*/
abstract contract Auth {
address internal owner;
mapping (address => bool) internal authorizations;

constructor(address _owner) {
owner = _owner;
authorizations[_owner] = true;
}

/**
* Function modifier to require caller to be contract owner
*/
modifier onlyOwner() {
require(isOwner(msg.sender), "!OWNER"); _;
}

/**
* Function modifier to require caller to be authorized
*/
modifier authorized() {
require(isAuthorized(msg.sender), "!AUTHORIZED"); _;
}

/**
* Authorize address. Owner only
*/
function authorize(address adr) public onlyOwner {
authorizations[adr] = true;
}

/**
* Remove address' authorization. Owner only
*/
function unauthorize(address adr) public onlyOwner {
authorizations[adr] = false;
}

/**
* Check if address is owner
*/
function isOwner(address account) public view returns (bool) {
return account == owner;
}
/** * Return address' authorization status
*/
function isAuthorized(address adr) public view returns (bool) {
return authorizations[adr];
}

/**
* Transfer ownership to new address. Caller must be owner. Leaves old owner authorized
*/
function transferOwnership(address payable adr) public onlyOwner {
owner = adr;
authorizations[adr] = true;
emit OwnershipTransferred(adr);
}

event OwnershipTransferred(address owner);
}

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

interface IDEXRouter {
function factory() external pure returns (address);
function WETH() external pure 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 swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;

function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;

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

interface IPrivateSale {
function startClaiming() external;
}

contract MetaYooshi is IBEP20, Auth {
using SafeMath for uint256;

event TradingEnabled(uint256 startDate);

address constant WBNB = 0x796035B5b080154ec07e52850b08CE46e23831cE; //Mainnet BSC :0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c // Testnet BSC: 0xae13d989daC2f0dEbFf460aC112a837C89BAa7cd // ETH Mainnet: 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D // ETH Testnet: 0xc778417E063141139Fce010982780140Aa0cD5Ab
address constant DEAD = 0x000000000000000000000000000000000000dEaD;
address constant ZERO = 0x0000000000000000000000000000000000000000;

string private constant _name = "MetaYooshi";
string private constant _symbol = "$MTYS";
uint8 private constant _decimals = 18;



uint256 private constant _totalSupply = 100000000 * (10 ** _decimals);
uint256 private constant _liqSupply = (_totalSupply * 100) /100;


uint256 public _maxTxAmount = (_totalSupply * 999) / 1000;
uint256 public _maxWalletSize = (_totalSupply * 999) / 1000;

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

mapping (address => bool) public isFeeExempt;
mapping (address => bool) public isTxLimitExempt;
mapping (address => bool) public isMaxWalletExempt;
mapping (address => bool) private bl;


//Buyfees
uint256 private liquidityFee = 3;
uint256 private marketingFee = 10;
uint256 private stakingFee = 0;
uint256 private devFee = 2;
uint256 private totalFee = 15;


//Sellfees
uint256 private sellLiquidityFee = 3;
uint256 private sellMarketingFee = 10;
uint256 private sellStakingFee = 0;
uint256 private sellDevFee = 2;
uint256 private totalSellFee = 15;


//AvFees
uint256 private tempLiquidityFee;
uint256 private tempMarketingFee;
uint256 private tempLiqProviderFee;
uint256 private tempDevFee;
uint256 private tempStakingFee;
uint256 private tempTotalFee;

uint256 private feeDenominator = 100;
uint256 public launchTimestamp;
uint256 private timeF;


address private marketingFeeReceiver = 0xe9bC8e1A674494Bc27E378B38F99E542813aADFD;
address private devFeeReceiver = 0x796035B5b080154ec07e52850b08CE46e23831cE;
address private ethBridgeAndExchange = 0x16A1c14661e3d9B674251cCD345C5180A37ecc26;
address private stakingWallet = 0x782666101BC683bd0F6FfefBF9A70212e41f873c;


IDEXRouter public router;
address public pair;

uint256 public launchedAt;

bool public tradingEnabled;
bool public swapEnabled;
uint256 public swapThreshold = _totalSupply / 1000 * 2; // 0.2%

bool private inSwap;

modifier swapping() { inSwap = true; _; inSwap = false; }

constructor () Auth(msg.sender) {
router = IDEXRouter(0x10ED43C718714eb63d5aA57B78B54704E256024E);
//Mainnet: 0x10ED43C718714eb63d5aA57B78B54704E256024E
//Testnet BSC: 0x9Ac64Cc6e4415144C455BD8E4837Fea55603e5c3
//Testnet ETH: 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
pair = IDEXFactory(router.factory()).createPair(WBNB, address(this));
_allowances[address(this)][address(router)] = type(uint256).max;

address _owner = owner;
isFeeExempt[_owner] = true;
isTxLimitExempt[_owner] = true;
isMaxWalletExempt[_owner] = true;
isFeeExempt[ethBridgeAndExchange] = true;
isTxLimitExempt[ethBridgeAndExchange] = true;
isMaxWalletExempt[ethBridgeAndExchange] = true;
isFeeExempt[stakingWallet] = true;
isTxLimitExempt[stakingWallet] = true;
isMaxWalletExempt[stakingWallet] = true;


_balances[_owner] = _liqSupply;
emit Transfer(address(0), _owner, _liqSupply);
}

receive() external payable { }

function totalSupply() external pure override returns (uint256) { return _totalSupply; }
function decimals() external pure override returns (uint8) { return _decimals; }
function symbol() external pure override returns (string memory) { return _symbol; }
function name() external pure override returns (string memory) { return _name; }
function getOwner() external view override returns (address) { return owner; }
function balanceOf(address account) public view override returns (uint256) { return _balances[account]; }
function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }

function approve(address spender, uint256 amount) public override returns (bool) {
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}

function approveMax(address spender) external returns (bool) {
return approve(spender, type(uint256).max);
}

function transfer(address recipient, uint256 amount) external override returns (bool) {
return _transferFrom(msg.sender, recipient, amount);
}

function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
if(_allowances[sender][msg.sender] != type(uint256).max){
_allowances[sender][msg.sender] = _allowances[sender][msg.sender].sub(amount, "Insufficient Allowance");
}

return _transferFrom(sender, recipient, amount);
}

function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
require(!bl[sender] && !bl[recipient]);
if(sender != pair && recipient != pair){ return _basicTransfer(sender, recipient, amount); } //transfer between wallets

if(!isFeeExempt[sender]){
require(tradingEnabled, "Trading is not enabled yet");
}

checkTxLimit(sender,recipient, amount);


if (recipient != pair && recipient != DEAD && recipient != ethBridgeAndExchange && sender != ethBridgeAndExchange) {
require(isTxLimitExempt[recipient] || isTxLimitExempt[sender] || isMaxWalletExempt[sender]|| isMaxWalletExempt[recipient] || _balances[recipient] amount <= _maxWalletSize, "Transfer amount exceeds max wallet size.");
}

if(shouldSwapBack()){ swapBack(); }


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

if(shouldTakeFee(sender) != true || shouldTakeFee(recipient) != true){
uint256 amountReceived = amount;
_balances[recipient] = _balances[recipient].add(amountReceived);

emit Transfer(sender, recipient, amountReceived);
}
else {
uint256 amountReceived = takeFee(sender, recipient, amount);
_balances[recipient] = _balances[recipient].add(amountReceived);

emit Transfer(sender, recipient, amountReceived);
}


return true;
}

function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
require(!bl[sender] && !bl[recipient]);
require(isMaxWalletExempt[recipient] || _balances[recipient] amount <= _maxWalletSize, "Transfer amount exceeds max wallet size basic transfer.");
require(isFeeExempt[sender] || tradingEnabled == true, "Trading not enabled yet");
_balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
return true;
}


function shouldTakeFee(address sender) internal view returns (bool) {
return !isFeeExempt[sender];
}

function getTotalFee(bool selling) public view returns (uint256) {
uint256 multiplier = AntiDumpMultiplier();
bool firstFewBlocks = AntSni();
if(selling) { return totalSellFee.mul(multiplier); }
if (firstFewBlocks) {return feeDenominator.sub(1); }
return totalFee;
}

function AntiDumpMultiplier() private view returns (uint256) {
uint256 time_since_start = block.timestamp - launchTimestamp;
uint256 hour = 3600;
if (time_since_start > 1 * hour) { return (1);}
else { return (2);}
}

function AntSni() private view returns (bool) {
uint256 time_since_start = block.timestamp - launchTimestamp;
if (time_since_start < timeF) { return true;}
else { return false;}
}

function updateTimeF(uint256 _int) external onlyOwner {
require(_int < 1536, "Time too long");
timeF = _int;
}


function takeFee(address sender, address receiver, uint256 amount) internal returns (uint256) {
uint256 feeAmount = amount.mul(getTotalFee(receiver == pair)).div(feeDenominator);
if(receiver == pair) {
uint256 stakingFeeAmount = amount.mul(sellStakingFee).div(feeDenominator).mul(AntiDumpMultiplier());
uint256 newFeeAmount = feeAmount.sub(stakingFeeAmount);

_balances[stakingWallet] = _balances[stakingWallet].add(stakingFeeAmount);
emit Transfer(sender, stakingWallet, stakingFeeAmount);

_balances[address(this)] = _balances[address(this)].add(newFeeAmount);
emit Transfer(sender, address(this), newFeeAmount); //send 22k
return amount.sub(feeAmount);
}
else {
uint256 stakingFeeAmount = amount.mul(stakingFee).div(feeDenominator);
uint256 newFeeAmount = feeAmount.sub(stakingFeeAmount);


_balances[stakingWallet] = _balances[stakingWallet].add(stakingFeeAmount);
emit Transfer(sender, stakingWallet, stakingFeeAmount);

_balances[address(this)] = _balances[address(this)].add(newFeeAmount);
emit Transfer(sender, address(this), newFeeAmount);
return amount.sub(feeAmount);
}

}

function shouldSwapBack() internal view returns (bool) {
return msg.sender != pair
&& !inSwap
&& swapEnabled
&& _balances[address(this)] >= swapThreshold;
}

function getSwapFees() internal {
tempLiquidityFee = liquidityFee.add(sellLiquidityFee).div(2);
tempMarketingFee = marketingFee.add(sellMarketingFee).div(2);
tempStakingFee = stakingFee.add(sellStakingFee).div(2);
tempDevFee = devFee.add(sellDevFee).div(2);
tempTotalFee = totalFee.add(totalSellFee).div(2);
}

function swapBack() internal swapping {
//average the fees
getSwapFees();

uint256 contractTokenBalance = balanceOf(address(this));
uint256 amountToLiquify = contractTokenBalance.mul(tempLiquidityFee).div(tempTotalFee.sub(tempStakingFee)).div(2);
uint256 amountToSwap = contractTokenBalance.sub(amountToLiquify);

address[] memory path = new address[](2);
path[0] = address(this);
path[1] = WBNB;

uint256 balanceBefore = address(this).balance;

router.swapExactTokensForETHSupportingFeeOnTransferTokens(
amountToSwap,
0,
path,
address(this),
block.timestamp
);

uint256 amountBNB = address(this).balance.sub(balanceBefore);
uint256 totalBNBFee = tempTotalFee.sub(tempStakingFee).sub(tempLiquidityFee.div(2));
uint256 amountBNBLiquidity = amountBNB.mul(tempLiquidityFee).div(totalBNBFee).div(2);
uint256 amountBNBMarketing = amountBNB.mul(tempMarketingFee).div(totalBNBFee);
uint256 amountDevFee = amountBNB.mul(tempDevFee).div(totalBNBFee);


(bool MarketingSuccess, /* bytes memory data */) = payable(marketingFeeReceiver).call{value: amountBNBMarketing, gas: 30000}("");
(bool DevSuccess, /* bytes memory data */) = payable(devFeeReceiver).call{value: amountDevFee, gas: 30000}("");
require(MarketingSuccess && DevSuccess,"receiver rejected ETH transfer");

if(amountToLiquify > 0){
router.addLiquidityETH{value: amountBNBLiquidity}(
address(this),
amountToLiquify,
0,
0,
marketingFeeReceiver,
block.timestamp
);
}
}


function startTrading() external onlyOwner{
tradingEnabled = true;
swapEnabled = true;
launchTimestamp = block.timestamp;
emit TradingEnabled(block.timestamp);
}

function startTradingManually() external onlyOwner{
tradingEnabled = true;
swapEnabled = true;
launchTimestamp = block.timestamp;
emit TradingEnabled(block.timestamp);
}

function launched() internal view returns (bool) {
return launchedAt != 0;
}

function launch() internal {
launchedAt = block.number;
}

function checkTxLimit(address sender, address recipient, uint256 amount) internal view {
require(amount <= _maxTxAmount || isTxLimitExempt[sender]|| isTxLimitExempt[recipient], "TX Limit Exceeded");
}

function setTxLimit(uint256 amount) external authorized {
require(amount >= _totalSupply / 1000);
_maxTxAmount = amount;
}

function setMaxWallet(uint256 amount) external onlyOwner() {
require(amount >= _totalSupply / 1000 );
_maxWalletSize = amount;
}

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

function excludeFromMaxWallet(address _wallet, bool _excludeFromMaxWallet) external onlyOwner{
isMaxWalletExempt[_wallet] = _excludeFromMaxWallet;
}

function setBl(address _wallet, bool _bl) external onlyOwner{
isMaxWalletExempt[_wallet] = _bl;
}

function excludeFromMaxTX(address _wallet, bool _excludeFromMaxTx) external onlyOwner{
isTxLimitExempt[_wallet]= _excludeFromMaxTx;
}

function setBuyFees(uint256 _liquidityFee, uint256 _marketingFee, uint256 _stakingFee, uint256 _devFee, uint256 _feeDenominator) external authorized {
liquidityFee = _liquidityFee;
marketingFee = _marketingFee;
stakingFee = _stakingFee;

devFee = _devFee;
totalFee = _liquidityFee.add(_marketingFee).add(_stakingFee).add(_devFee);
feeDenominator = _feeDenominator;
}

function setSellFees(uint256 _liquidityFee, uint256 _marketingFee, uint256 _stakingFee, uint256 _devFee, uint256 _feeDenominator) external authorized {
liquidityFee = _liquidityFee;
marketingFee = _marketingFee;
sellStakingFee = _stakingFee;

sellDevFee = _devFee;
totalSellFee = _liquidityFee.add(_marketingFee).add(_stakingFee).add(_devFee);
feeDenominator = _feeDenominator;
}

function setMarketingFeeReceiver(address _marketingFeeReceiver) external authorized {
marketingFeeReceiver = _marketingFeeReceiver;
}

function setDevFeeReceiver(address _devFeeReceiver) external authorized {
devFeeReceiver = _devFeeReceiver;
}

function setSwapBackSettings(bool _enabled, uint256 _amount) external authorized {
swapEnabled = _enabled;
swapThreshold = _amount;
}


function manualSend() external authorized {
uint256 contractETHBalance = address(this).balance;
payable(marketingFeeReceiver).transfer(contractETHBalance);
}

function transferERC20(address _token, uint _amount) public authorized {
require(_amount <= IBEP20(_token).balanceOf(address(this)), "Can't transfer more than the balance");
IBEP20(_token).transfer(marketingFeeReceiver, _amount);
}

function getCirculatingSupply() public view returns (uint256) {
return _totalSupply.sub(balanceOf(DEAD)).sub(balanceOf(ZERO));
}



}