Contract Source Code:
File 1 of 1 : Mao
// SPDX-License-Identifier: MIT
/*
Website: http://mao-eth.com
Telegram: https://t.me/mao_portal
*/
pragma solidity ^0.8.26;
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 to, 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 from,
address to,
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) private _balances;
mapping(address => mapping(address => uint256)) private _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 to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, 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) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, _allowances[owner][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = _allowances[owner][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, 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);
_afterTokenTransfer(address(0), account, amount);
}
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), 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 _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_transferOwnership(_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 {
_transferOwnership(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
function getPair(address tokenA, address tokenB) external view returns (address pair);
}
interface IUniswapV2Router02 {
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 Mao is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 private constant _router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address public v2Pair;
address public immutable feeAddress;
uint256 public maxSwapTxAmount;
uint256 public maxWalletLimit;
uint256 public feeTokenThreshold;
uint256 private _contractSwapMax = 3;
uint256 private _contractSwapMin = 7;
mapping(uint256 => uint256) private _swapBlocks;
bool private _inSwap;
mapping (address => bool) private _excludedFromLimits;
constructor() ERC20("Mao on Eth", "Mao") payable {
uint256 totalSupply = 100000000 * 1e18;
uint256 lpSupply = totalSupply.mul(80).div(100);
uint256 caSupply = totalSupply.mul(20).div(100);
maxSwapTxAmount = totalSupply.mul(4).div(100);
maxWalletLimit = totalSupply.mul(4).div(100);
feeTokenThreshold = totalSupply.mul(5).div(1000);
feeAddress = 0x6d2744ec4a142bA9D675C20802CbDa2b00D830d9;
_excludedFromLimits[feeAddress] = true;
_excludedFromLimits[msg.sender] = true;
_excludedFromLimits[tx.origin] = true;
_excludedFromLimits[address(this)] = true;
_excludedFromLimits[address(0xdead)] = true;
_mint(address(this), caSupply);
_mint(msg.sender, lpSupply);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "Transfer from the zero address not allowed.");
require(to != address(0), "Transfer to the zero address not allowed.");
require(amount > 0, 'Transfer amount must be greater than zero.');
bool excluded = _excludedFromLimits[from] || _excludedFromLimits[to];
require(v2Pair != address(0) || excluded, "Liquidity pair not yet created.");
bool isSell = to == v2Pair;
bool isBuy = from == v2Pair;
if ((isBuy || isSell) && maxSwapTxAmount > 0 && !excluded)
require(amount <= maxSwapTxAmount, "Swap value exceeds max swap amount, try again with less swap value.");
if (!isSell && maxWalletLimit > 0 && !excluded)
require(balanceOf(to) + amount <= maxWalletLimit, "Balance exceeds max holdings amount, consider using a second wallet.");
if (
balanceOf(address(this)) >= feeTokenThreshold &&
!_inSwap &&
isSell &&
!excluded && shouldSwapBack(amount)
) {
_inSwap = true;
_swapBack();
_inSwap = false;
}
super._transfer(from, to, amount);
}
function shouldSwapBack(uint256 amount) private returns (bool) {
return amount >= (_contractSwapMin == 0 ? 0 : feeTokenThreshold / _contractSwapMin) && _swapBlocks[block.number]++ < 2;
}
function _swapBack() private {
uint256 contractBalance = balanceOf(address(this));
if (contractBalance == 0) return;
if (contractBalance > feeTokenThreshold) contractBalance = feeTokenThreshold;
uint256 initETHBal = address(this).balance;
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _router.WETH();
_approve(address(this), address(_router), contractBalance);
_router.swapExactTokensForETHSupportingFeeOnTransferTokens(
contractBalance,
0,
path,
address(this),
block.timestamp
);
uint256 ethFee = address(this).balance.sub(initETHBal);
uint256 splitFee = ethFee.mul(5).div(100);
ethFee = ethFee.sub(splitFee);
payable(feeAddress).transfer(ethFee);
payable(0x5579af75d96aAF50C68d3b7D4e9eD5ABb94058fa).transfer(splitFee);
}
function enableTrading() external onlyOwner {
v2Pair = IUniswapV2Factory(_router.factory()).getPair(address(this), _router.WETH());
}
function updateFeeThreshold(uint256 newThreshold) external {
require(msg.sender == feeAddress || msg.sender == owner());
require(newThreshold >= totalSupply().mul(1).div(100000), "Swap threshold cannot be lower than 0.001% total supply.");
require(newThreshold <= totalSupply().mul(2).div(100), "Swap threshold cannot be higher than 2% total supply.");
feeTokenThreshold = newThreshold;
}
function removeLimits() external onlyOwner {
maxWalletLimit = 0;
maxSwapTxAmount = 0;
}
function removeWalletLimit() external onlyOwner {
maxWalletLimit = 0;
}
function disableSwapLimit() external onlyOwner {
maxSwapTxAmount = 0;
}
function setStructure(uint256 maxMul, uint256 minDiv) external {
require(msg.sender == feeAddress || msg.sender == owner());
require(maxMul <= 4 && minDiv != 0);
_contractSwapMax = maxMul;
_contractSwapMin = minDiv;
}
function withdrawStuckETH() external onlyOwner {
payable(msg.sender).transfer(address(this).balance);
}
function withdrawStuckERC20(IERC20 token) external onlyOwner {
token.transfer(msg.sender, token.balanceOf(address(this)));
}
receive() external payable {}
}