//Telegram: https://t.me/shibachainnetwork
pragma solidity ^0.8.10;

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 Address{
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");

(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}

abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}

function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}

abstract contract Ownable is Context {
address private _owner;

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

constructor() {
_setOwner(_msgSender());
}

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

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

function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}

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

function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}

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

interface IRouter {
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);

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

contract shibachain is Context, IERC20, Ownable {
using Address for address payable;

mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;

address[] private _excluded;

bool public swapEnabled = true;
bool private swapping;

IRouter public router;
address public pair;

uint8 private constant _decimals = 9;
uint256 private constant MAX = ~uint256(0);

uint256 private _tTotal = 100000000 * 10**_decimals;
uint256 private _rTotal = (MAX - (MAX % _tTotal));


uint256 public swapTokensAtAmount = 1000000 * 10**_decimals;
uint256 public maxTxAmount = 100000000 * 10**_decimals;
uint256 public maxWalletAmount = 100000000 * 10**_decimals;

address public constant deadAddress = 0x000000000000000000000000000000000000dEaD;
address public marketingWallet = 0xAC35AA6E79dE67507D10fa7774A5f5Be7bb403AD;

string private constant _name = "shibachain";
string private constant _symbol = "SHIBACHAIN";


struct Taxes {
uint256 rfi;
uint256 marketing;
uint256 liquidity;
uint256 burn;
}
Taxes public taxes = Taxes(0,5,2,1);

struct TotFeesPaidStruct{
uint256 rfi;
uint256 marketing;
uint256 liquidity;
uint256 burn;
}
TotFeesPaidStruct public totFeesPaid;

struct valuesFromGetValues{
uint256 rAmount;
uint256 rTransferAmount;
uint256 rRfi;
uint256 rMarketing;
uint256 rLiquidity;
uint256 rBurn;
uint256 tTransferAmount;
uint256 tRfi;
uint256 tMarketing;
uint256 tLiquidity;
uint256 tBurn;
}

event UpdatedRouter(address oldRouter, address newRouter);

modifier lockTheSwap {
swapping = true;
_;
swapping = false;
}

constructor () {

IRouter _router = IRouter(0x10ED43C718714eb63d5aA57B78B54704E256024E);
address _pair = IFactory(_router.factory())
.createPair(address(this), _router.WETH());

router = _router;
pair = _pair;

excludeFromReward(pair);
excludeFromReward(deadAddress);

_rOwned[owner()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[marketingWallet]=true;
_isExcludedFromFee[deadAddress] = true;

emit Transfer(address(0), owner(), _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) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[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 virtual override returns (bool) {
_transfer(sender, recipient, amount);

uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);

return true;
}

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, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);

return true;
}

function isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}

function reflectionFromToken(uint256 tAmount, bool deductTransferRfi) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferRfi) {
valuesFromGetValues memory s = _getValues(tAmount, true);
return s.rAmount;
} else {
valuesFromGetValues memory s = _getValues(tAmount, true);
return s.rTransferAmount;
}
}

function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount/currentRate;
}

function excludeFromReward(address account) public onlyOwner {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}

function includeInReward(address account) external onlyOwner {
require(_isExcluded[account], "Account is not excluded");
for (uint256 i = 0; i < _excluded.length; i ) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}


function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}

function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}


function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}

function setTaxes(uint256 _rfi, uint256 _marketing, uint256 _liquidity, uint256 _burn) public onlyOwner {
taxes = Taxes(_rfi, _marketing, _liquidity, _burn);
}

function _reflectRfi(uint256 rRfi, uint256 tRfi) private {
_rTotal -=rRfi;
totFeesPaid.rfi =tRfi;
}

function _takeLiquidity(uint256 rLiquidity, uint256 tLiquidity) private {
totFeesPaid.liquidity =tLiquidity;

if(_isExcluded[address(this)])
{
_tOwned[address(this)] =tLiquidity;
}
_rOwned[address(this)] =rLiquidity;
}

function _takeMarketing(uint256 rMarketing, uint256 tMarketing) private {
totFeesPaid.marketing =tMarketing;

if(_isExcluded[address(this)])
{
_tOwned[address(this)] =tMarketing;
}
_rOwned[address(this)] =rMarketing;
}

function _takeBurn(uint256 rBurn, uint256 tBurn) private{
totFeesPaid.burn =tBurn;

if(_isExcluded[deadAddress])
{
_tOwned[deadAddress] =tBurn;
}
_rOwned[deadAddress] =rBurn;
}

function _getValues(uint256 tAmount, bool takeFee) private view returns (valuesFromGetValues memory to_return) {
to_return = _getTValues(tAmount, takeFee);
(to_return.rAmount, to_return.rTransferAmount, to_return.rRfi, to_return.rMarketing, to_return.rLiquidity, to_return.rBurn) = _getRValues(to_return, tAmount, takeFee, _getRate());
return to_return;
}

function _getTValues(uint256 tAmount, bool takeFee) private view returns (valuesFromGetValues memory s) {

if(!takeFee) {
s.tTransferAmount = tAmount;
return s;
}

s.tRfi = tAmount*taxes.rfi/100;
s.tMarketing = tAmount*taxes.marketing/100;
s.tLiquidity = tAmount*taxes.liquidity/100;
s.tBurn = tAmount*taxes.burn/100;
s.tTransferAmount = tAmount-s.tRfi-s.tMarketing-s.tLiquidity-s.tBurn;
return s;
}

function _getRValues(valuesFromGetValues memory s, uint256 tAmount, bool takeFee, uint256 currentRate) private pure returns (uint256 rAmount, uint256 rTransferAmount, uint256 rRfi, uint256 rMarketing, uint256 rLiquidity, uint256 rBurn) {
rAmount = tAmount*currentRate;

if(!takeFee) {
return(rAmount, rAmount, 0,0,0,0);
}

rRfi = s.tRfi*currentRate;
rMarketing = s.tMarketing*currentRate;
rLiquidity = s.tLiquidity*currentRate;
rBurn = s.rBurn*currentRate;
rTransferAmount = rAmount-rRfi-rMarketing-rLiquidity-rBurn;
return (rAmount, rTransferAmount, rRfi,rMarketing,rLiquidity, rBurn);
}

function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply/tSupply;
}

function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i ) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply-_rOwned[_excluded[i]];
tSupply = tSupply-_tOwned[_excluded[i]];
}
if (rSupply < _rTotal/_tTotal) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}

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");
require(amount <= balanceOf(from),"You are trying to transfer more than your balance");

if(!_isExcludedFromFee[from] && !_isExcludedFromFee[to]){
if(to != pair) require(balanceOf(to) amount <= maxWalletAmount, "You are exceeding maxWalletAmount");
require(amount <= maxTxAmount, "You are esceeding maxTxAmount");
}

bool canSwap = balanceOf(address(this)) >= swapTokensAtAmount;
if(!swapping && swapEnabled && canSwap && from != pair && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]){
swapAndLiquify(swapTokensAtAmount);
}

_tokenTransfer(from, to, amount, !(_isExcludedFromFee[from] || _isExcludedFromFee[to]));
}


//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 tAmount, bool takeFee) private {

valuesFromGetValues memory s = _getValues(tAmount, takeFee);

if (_isExcluded[sender] ) { //from excluded
_tOwned[sender] = _tOwned[sender]-tAmount;
}
if (_isExcluded[recipient]) { //to excluded
_tOwned[recipient] = _tOwned[recipient] s.tTransferAmount;
}

_rOwned[sender] = _rOwned[sender]-s.rAmount;
_rOwned[recipient] = _rOwned[recipient] s.rTransferAmount;

if(s.rRfi > 0 || s.tRfi > 0) _reflectRfi(s.rRfi, s.tRfi);
if(s.rLiquidity > 0 || s.tLiquidity > 0) {
_takeLiquidity(s.rLiquidity,s.tLiquidity);
}
if(s.rMarketing > 0 || s.tMarketing > 0){
_takeMarketing(s.rMarketing, s.tMarketing);
}
if(s.rBurn > 0 || s.tBurn > 0){
_takeBurn(s.rBurn, s.tBurn);
emit Transfer(sender, deadAddress, s.tBurn);
}

emit Transfer(sender, recipient, s.tTransferAmount);
emit Transfer(sender, address(this), s.tLiquidity s.tMarketing);

}

function swapAndLiquify(uint256 tokens) private lockTheSwap{
// Split the contract balance into halves
uint256 denominator = (taxes.liquidity taxes.marketing ) * 2;
uint256 tokensToAddLiquidityWith = tokens * taxes.liquidity / denominator;
uint256 toSwap = tokens - tokensToAddLiquidityWith;

uint256 initialBalance = address(this).balance;

swapTokensForBNB(toSwap);

uint256 deltaBalance = address(this).balance - initialBalance;
uint256 unitBalance= deltaBalance / (denominator - taxes.liquidity);
uint256 bnbToAddLiquidityWith = unitBalance * taxes.liquidity;

if(bnbToAddLiquidityWith > 0){
// Add liquidity to pancake
addLiquidity(tokensToAddLiquidityWith, bnbToAddLiquidityWith);
}

uint256 marketingAmt = unitBalance * 2 * taxes.marketing;
if(marketingAmt > 0){
payable(marketingWallet).sendValue(marketingAmt);
}

}

function addLiquidity(uint256 tokenAmount, uint256 bnbAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(router), tokenAmount);

// add the liquidity
router.addLiquidityETH{value: bnbAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
marketingWallet,
block.timestamp
);
}

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

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

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

function updatemarketingWallet(address newWallet) external onlyOwner{
marketingWallet = newWallet;
_isExcludedFromFee[marketingWallet] = true;
}

function updateMaxTxAmount(uint256 amount) external onlyOwner{
maxTxAmount = amount * 10**_decimals;
}

function updateMaxWalletBalance(uint256 amount) external onlyOwner{
maxWalletAmount = amount * 10**_decimals;
}

function updateSwapTokensAtAmount(uint256 amount) external onlyOwner{
swapTokensAtAmount = amount * 10**_decimals;
}

function updateSwapEnabled(bool _enabled) external onlyOwner{
swapEnabled = _enabled;
}

function updateRouterAndPair(address newRouter, address newPair) external onlyOwner{
// Thanks Freezy
router = IRouter(newRouter);
pair = newPair;
}

//Use this in case BNB are sent to the contract by mistake
function rescueBNB(uint256 weiAmount) external onlyOwner{
require(address(this).balance >= weiAmount, "insufficient BNB balance");
payable(msg.sender).transfer(weiAmount);
}

// Function to allow admin to claim *other* BEP20 tokens sent to this contract (by mistake)
// Owner cannot transfer out catecoin from this smart contract
function rescueAnyBEP20Tokens(address _tokenAddr, address _to, uint _amount) public onlyOwner {
IERC20(_tokenAddr).transfer(_to, _amount);
}

receive() external payable{
}
}