文件 1 的 1:BARBAR.sol
pragma solidity 0.8.23;
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 Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value);
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_setOwner(_msgSender());
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
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));
}
}
library SafeMath {
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 add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
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(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() 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 WETH() external pure returns (address);
}
contract BARBAR is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _exclFromLimit;
uint8 private constant _decimals = 18;
uint256 private constant _tTotal = 21000000000 * 10**_decimals;
string private constant _name = unicode"BARBAR";
string private constant _symbol = unicode"BARBAR";
uint256 public _buyFee = 5;
uint256 public _sellFee = 5;
address payable private _feeWallet;
uint256 public _maxTxAmount = _tTotal;
uint256 public _maxWalletSize = _tTotal;
uint256 public _taxSwapThreshold = 1000000000 * 10**_decimals;
uint256 public _maxTaxSwap = 1000000000 * 10**_decimals;
IUniswapV2Router02 private constant _router = IUniswapV2Router02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
address public uniswapPair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeWallet = payable(0xB25b5610f1FD5cDd6d2c33d2A717BC3b8589C9ce);
_balances[_msgSender()] = _tTotal;
_exclFromLimit[_feeWallet] = true;
_exclFromLimit[address(this)] = true;
emit Transfer(address(0), _msgSender(), _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 pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[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 override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
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 _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");
uint256 feeAmount = 0;
if (from == uniswapPair) {
feeAmount = amount.mul(_buyFee).div(100);
} else if (to == uniswapPair) {
feeAmount = amount.mul(_sellFee).div(100);
}
if (feeAmount > 0) {
_balances[from] = _balances[from].sub(feeAmount);
_balances[address(this)] = _balances[address(this)].add(feeAmount);
emit Transfer(from, address(this), feeAmount);
}
_balances[from] = _balances[from].sub(amount.sub(feeAmount));
_balances[to] = _balances[to].add(amount.sub(feeAmount));
emit Transfer(from, to, amount.sub(feeAmount));
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && swapEnabled && contractTokenBalance >= _taxSwapThreshold) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(contractETHBalance);
}
}
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _router.WETH();
_approve(address(this), address(_router), tokenAmount);
_router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_feeWallet.transfer(amount);
}
function setFees(uint256 buyFee, uint256 sellFee) external onlyOwner {
require(buyFee <= 30 && sellFee <= 30, "Fees cannot exceed 30%");
_buyFee = buyFee;
_sellFee = sellFee;
}
function openTrading() external onlyOwner {
require(!tradingOpen, "trading is already open");
_approve(address(this), address(_router), _tTotal);
swapEnabled = true;
uniswapPair = IUniswapV2Factory(_router.factory()).createPair(address(this), _router.WETH());
_router.addLiquidityETH{value: address(this).balance}(address(this), balanceOf(address(this)), 0, 0, owner(), block.timestamp);
IERC20(uniswapPair).approve(address(_router), type(uint).max);
tradingOpen = true;
}
receive() external payable {}
}