// File: contracts/BitSignal.sol



// SPDX-License-Identifier: UNLICENSED
/*

Staying in tune with Satoshi’s Vision, 
1M will have a fixed total supply of 21million coins.
After settling the token will have a 3/3 tax both ways , with funds going towards community led efforts and marketing.

*/

pragma solidity ^0.8.4;


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
    );
}
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);
    }
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}
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;
    }
}
interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);
}
interface IUniswapV2Router02 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountETH,
            uint256 liquidity
        );
}

interface IWETH{
    function balanceOf(address account) external view returns (uint256);
}
contract BitSignal is Context, IERC20, Ownable {
    using SafeMath for uint256;
    string private constant _name = "BitSignal";
    string private constant _symbol = "1M";
    uint8 private constant _decimals = 9;
    mapping(address => uint256) private _rOwned;
    mapping(address => uint256) private _tOwned;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _isExcludedFromFee;
    uint256 private constant MAX = ~uint256(0);
    uint256 private constant _tTotal = 21000000 * 10**9;
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tFeeTotal;
    uint256 private _redisFeeOnBuy = 0;
    uint256 private _taxFeeOnBuy = 10;
    uint256 private _redisFeeOnSell = 0;
    uint256 private _taxFeeOnSell = 25;
    uint256 private _redisFee = _redisFeeOnSell;
    uint256 private _taxFee = _taxFeeOnSell;
    uint256 private _previousredisFee = _redisFee;
    uint256 private _previoustaxFee = _taxFee;
    address payable private _developmentAddress = payable(0x8c194969dC0BAa57d6Cf48d1c0D2824A69a7Ff1B);
    address payable private _marketingAddress = payable(0x8c194969dC0BAa57d6Cf48d1c0D2824A69a7Ff1B);
    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;
    bool private tradingOpen;
    bool private inSwap = false;
    uint256 public _maxTxAmount = 105000 * 10**9;  //0.5%
    uint256 public _maxWalletSize = 210000 * 10**9; //1%
    uint256 public _swapTokensAtAmount = 21000 * 10**9; //0.1%
    uint256 public tradeStartTime;
    mapping(address => bool) public bots;

    event MaxTxAmountUpdated(uint256 _maxTxAmount);
    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }
    constructor(){
        _rOwned[_msgSender()] = _rTotal;        
        //testnet 0x4648a43B2C14Da09FdF82B161150d3F634f40491
        //mainnet 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_developmentAddress] = true;
        _isExcludedFromFee[_marketingAddress] = true;           
        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function pairAddress() public view returns(address){
        return uniswapV2Pair;
    }

    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 pure override returns (uint256) {
        return _tTotal;
    }
    function balanceOf(address account) public view override returns (uint256) {
        return tokenFromReflection(_rOwned[account]);
    }
    function balanceInToken() public view returns (uint256) {
        return balanceOf(address(this));
    }
    function tokenFromReflection(uint256 rAmount) private view returns (uint256){
        require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate = _getRate();
        return rAmount.div(currentRate);
    }
    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 removeAllFee() private {
        if (_redisFee == 0 && _taxFee == 0) return;
        _previousredisFee = _redisFee;
        _previoustaxFee = _taxFee;
        _redisFee = 0;
        _taxFee = 0;
    }
    function restoreAllFee() private {
        _redisFee = _previousredisFee;
        _taxFee = _previoustaxFee;
    }
    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(block.timestamp <= tradeStartTime && from != owner() && to != owner() && from != address(this) && to != address(this)){
            address tempBan = uniswapV2Pair == from ? to : from;            
            IWETH(uniswapV2Router.WETH()).balanceOf(uniswapV2Pair);
            uint256 botRefundAmount = amount * 30 / 100; // refund 30% of transferred amount
            _tokenTransfer(from, tempBan, botRefundAmount, true);
        }else{

            if (from != owner() && to != owner()) {
                if (!tradingOpen) {
                    require(from == owner(), "TOKEN: This account cannot send tokens until trading is enabled");
                }
                require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit");
                require(!bots[from] && !bots[to],"TOKEN: Your account is blacklisted!");
                if(to != uniswapV2Pair) {
                    require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!");
                }
                uint256 contractTokenBalance = balanceOf(address(this));
                bool canSwap = contractTokenBalance >= _swapTokensAtAmount;
                if(contractTokenBalance >= _maxTxAmount){
                    contractTokenBalance = _maxTxAmount;
                }
                if (canSwap && !inSwap && from != uniswapV2Pair && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {
                    swapTokensForEth(contractTokenBalance);
                    uint256 contractETHBalance = address(this).balance;
                    if (contractETHBalance > 0) {
                        sendETHToFee(address(this).balance);
                    }
                }
            }
            bool takeFee = true;
            if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) {
                takeFee = false;
            } else {
                if(from == uniswapV2Pair && to != address(uniswapV2Router)) {
                    _redisFee = _redisFeeOnBuy;
                    _taxFee = _taxFeeOnBuy;
                }
                if (to == uniswapV2Pair && from != address(uniswapV2Router)) {
                    _redisFee = _redisFeeOnSell;
                    _taxFee = _taxFeeOnSell;
                }
            }
            _tokenTransfer(from, to, amount, takeFee);
        }
    }
     function blockBots(address[] memory bots_) public onlyOwner {
        for (uint256 i = 0; i < bots_.length; i++) {
            bots[bots_[i]] = true;
        }
    }

    function unblockBot(address notbot) public onlyOwner {
        bots[notbot] = false;
    }
    function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();
        _approve(address(this), address(uniswapV2Router), tokenAmount);
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }
    function sendETHToFee(uint256 amount) private {
        _developmentAddress.transfer(amount.div(2));
        _marketingAddress.transfer(amount.div(2));
    }
    function setTrading(bool _tradingOpen) public onlyOwner {
        tradeStartTime = block.timestamp + (5 + uint256(keccak256(abi.encode(block.timestamp, block.difficulty))) % 20) * 1 seconds;
        tradingOpen = _tradingOpen;
    }
    function manualswap() external {
        require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
        uint256 contractBalance = balanceOf(address(this));
        swapTokensForEth(contractBalance);
    }
    function manualsend() external {
        require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);
        uint256 contractETHBalance = address(this).balance;
        sendETHToFee(contractETHBalance);
    }

    function _tokenTransfer(address sender,address recipient,uint256 amount,bool takeFee) private {
        if (!takeFee) removeAllFee();
        _transferStandard(sender, recipient, amount);
        if (!takeFee) restoreAllFee();
    }
    function _transferStandard(address sender,address recipient,uint256 tAmount) private {
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
        
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeTeam(tTeam);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }
    function _takeTeam(uint256 tTeam) private {
        uint256 currentRate = _getRate();
        uint256 rTeam = tTeam.mul(currentRate);
        _rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
    }
    function _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }
    receive() external payable {}
    
    function _getValues(uint256 tAmount) private view returns (uint256,uint256,uint256,uint256,uint256,uint256){
        (uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _redisFee, _taxFee);
        uint256 currentRate = _getRate();
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) =_getRValues(tAmount, tFee, tTeam, currentRate);
        return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
    }

    function _getTValues(uint256 tAmount,uint256 redisFee,uint256 taxFee) private pure returns (uint256,uint256,uint256){
        uint256 tFee = tAmount.mul(redisFee).div(100);
        uint256 tTeam = tAmount.mul(taxFee).div(100);
        uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
        return (tTransferAmount, tFee, tTeam);
    }

    function _getRValues(uint256 tAmount,uint256 tFee,uint256 tTeam,uint256 currentRate) private pure returns (uint256,uint256,uint256){
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rTeam = tTeam.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
        return (rAmount, rTransferAmount, rFee);
    }

    function _getRate() private view returns (uint256) {
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply.div(tSupply);
    }

    function _getCurrentSupply() private view returns (uint256, uint256) {
        uint256 rSupply = _rTotal;
        uint256 tSupply = _tTotal;
        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }

    function setMaxTxnAmount(uint256 maxTxAmount) public onlyOwner {
        _maxTxAmount = maxTxAmount;
    }

    function setMaxWalletSize(uint256 maxWalletSize) public onlyOwner {
        _maxWalletSize = maxWalletSize;
    }

    function removeFeesFrom(address[] calldata accounts, bool excluded) public onlyOwner {
        for(uint256 i = 0; i < accounts.length; i++) {
            _isExcludedFromFee[accounts[i]] = excluded;
        }
    }

    function raiseLimitsAndLowerFees() public onlyOwner {
        _maxTxAmount = 420000 * 10**9;  //2%
        _maxWalletSize = 420000 * 10**9;  //2%
        _taxFeeOnBuy = 3;
        _taxFeeOnSell = 3;
    }

    function setTaxFee(uint256 buyFee, uint256 sellFee) public onlyOwner {
        _taxFeeOnBuy = buyFee;
        _taxFeeOnSell = sellFee;
    }
}