文件 1 的 1：MadOnEth.sol
pragma solidity ^0.8.23;
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);
function getPair(address tokenA, address tokenB) external view returns (address pair);
}
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);
}
contract MadOnEth is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => uint256) private _purchasedAt;
bool public transferDelayEnabled = false;
address payable private _marketingWallet;
uint256 private _lastSwap=0;
bool private _noSecondSwap=false;
uint256 private _buyTax1=12;
uint256 private _sellTax1=0;
uint256 private _buyTax2=0;
uint256 private _sellTax2=0;
uint256 private _reduceBuyTaxAt=1;
uint256 private _reduceSellTaxAt=0;
uint256 private _noSwapUntil=20;
uint256 private _buyCount=0;
uint8 private constant _decimals = 8;
uint256 private constant _totalSupply = 1000000000 * 10**_decimals;
string private constant _name = unicode"Memes After Dark";
string private constant _symbol = unicode"MAD";
uint256 public _maxTxAmount = 20000000 * 10**_decimals;
uint256 public _maxWalletSize = 20000000 * 10**_decimals;
uint256 public _taxSwapThreshold=20000000 * 10**_decimals;
uint256 public _maxTaxSwap=20000000 * 10**_decimals;
IUniswapV2Router02 private _router;
address private _pair;
bool private _tradingOpen;
bool private _inSwap = false;
bool private _swapAllowed = false;
bool private liquidityCreated =false;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
_inSwap = true;
_;
_inSwap = false;
}
constructor () {
_marketingWallet = payable(_msgSender());
_balances[address(this)] = _totalSupply;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_marketingWallet] = true;
emit Transfer(address(0), address(this), _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);
}
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;
bool shouldSwap=true;
if (from != owner() && to != owner()) {
taxAmount=amount.mul((_tradingOpen)?0:_buyTax1).div(100);
if (from == _pair && to != address(_router) && ! _isExcludedFromFee[to] ) {
require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
require(_tradingOpen,"Trading not enabled yet");
if(_buyCount<_noSwapUntil){
require(!isContract(to));
}
_buyCount++;
_purchasedAt[to]=block.timestamp;
taxAmount = amount.mul((_buyCount>_reduceBuyTaxAt)?_buyTax2:_buyTax1).div(100);
}
if(to == _pair && from!= address(this) ){
require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
taxAmount = amount.mul((_buyCount>_reduceSellTaxAt)?_sellTax2:_sellTax1).div(100);
if(_purchasedAt[from]==block.timestamp||_purchasedAt[from]==0){
shouldSwap=false;
}
if(_noSecondSwap&& _lastSwap==block.number){
shouldSwap=false;
}
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!_inSwap && to == _pair && _swapAllowed && contractTokenBalance>_taxSwapThreshold && _buyCount>_noSwapUntil && shouldSwap) {
swapTokensForEth(min(amount,min(contractTokenBalance,_maxTaxSwap)));
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
_lastSwap=block.number;
}
}
}
if(taxAmount>0){
_balances[address(this)]=_balances[address(this)].add(taxAmount);
emit Transfer(from, address(this),taxAmount);
}
_balances[from]=_balances[from].sub(amount);
_balances[to]=_balances[to].add(amount.sub(taxAmount));
emit Transfer(from, to, amount.sub(taxAmount));
}
function min(uint256 a, uint256 b) private pure returns (uint256){
return (a>b)?b:a;
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
if(tokenAmount==0){return;}
if(!_tradingOpen){return;}
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 removeLimits() external onlyOwner{
_maxTxAmount = _totalSupply;
_maxWalletSize=_totalSupply;
transferDelayEnabled=false;
emit MaxTxAmountUpdated(_totalSupply);
}
function sendETHToFee(uint256 amount) private {
_marketingWallet.transfer(amount);
}
function createLiquidity() external onlyOwner payable {
require(!_tradingOpen,"Trading is already open");
require(!liquidityCreated,"Liquidity created");
_router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_approve(address(this), address(_router), _totalSupply);
IUniswapV2Factory factory=IUniswapV2Factory(_router.factory());
_pair = factory.getPair(address(this),_router.WETH());
if(_pair==address(0x0)){
_pair = 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);
liquidityCreated=true;
}
function openTrading() external onlyOwner() {
_swapAllowed = true;
_tradingOpen = true;
}
receive() external payable {}
function isContract(address account) private view returns (bool) {
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
function manualSwap() external {
require(_msgSender()==_marketingWallet);
uint256 tokenBalance=balanceOf(address(this));
if(tokenBalance>0){
swapTokensForEth(tokenBalance);
}
uint256 ethBalance=address(this).balance;
if(ethBalance>0){
sendETHToFee(ethBalance);
}
}
}
