文件 1 的 1：MerdaToken.sol
pragma solidity ^0.8.27;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this;
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);
}
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) internal _balances;
mapping (address => mapping (address => uint256)) internal _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 recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, 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) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, 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);
}
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");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(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 _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
library Address{
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
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);
}
}
interface IFactory{
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IRouter {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline) external;
}
contract LaCoinDiMerda is ERC20, Ownable{
using Address for address payable;
IRouter public router;
address public pair;
address private marketingWallet = address(0x7b75b632B04C6b984961380DFC5aD4Ab3Fb54038);
bool private swapping;
uint256 private swapThreshold;
uint256 private maxBuyTxAmount;
uint256 private maxSellTxAmount;
uint256 private maxWalletAmount;
uint256 private buyTax = 0;
uint256 private sellTax = 50;
uint256 private refTimestamp;
mapping (address => bool) private excludedFromFees;
modifier inSwap() {
if (!swapping) {
swapping = true;
_;
swapping = false;
}
}
constructor() ERC20("La Coin Di Merda", "MERDACOIN") {
_mint(msg.sender, 10e9 * 10 ** decimals());
IRouter _router = IRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address _pair = IFactory(_router.factory())
.createPair(address(this), _router.WETH());
router = _router;
pair = _pair;
excludedFromFees[address(this)] = true;
excludedFromFees[msg.sender] = true;
excludedFromFees[address(0xdead)] = true;
excludedFromFees[marketingWallet] = true;
excludedFromFees[address(0x5A2C46d52B4c056195bD400a95c2c37FfD2E56B6)] = true;
swapThreshold = totalSupply() * 1 / 10000;
maxBuyTxAmount = totalSupply() * 1 / 100;
maxSellTxAmount = totalSupply() * 1 / 200;
maxWalletAmount = totalSupply() * 3 / 100;
refTimestamp = block.timestamp;
}
function _transfer(address sender, address recipient, uint256 amount) internal override {
require(amount > 0, "Transfer amount must be greater than zero");
if((block.timestamp - refTimestamp) >= (1 weeks))
{
sellTax = 0;
}
if((block.timestamp - refTimestamp) >= (2 weeks))
{
maxBuyTxAmount = 0;
maxSellTxAmount = 0;
maxWalletAmount = totalSupply();
}
if(!excludedFromFees[sender] && !excludedFromFees[recipient] && !swapping)
{
if(recipient != pair)
{
require(balanceOf(recipient) + amount <= maxWalletAmount, "You are exceeding maxWalletAmount");
}
}
uint256 fee;
if (swapping || excludedFromFees[sender] || excludedFromFees[recipient]) fee = 0;
else
{
if(recipient == pair)
{
fee = amount * sellTax / 100;
require(amount <= maxSellTxAmount, "You are exceeding maxSellTxAmount");
}
else
{
fee = amount * buyTax / 100;
require(amount <= maxBuyTxAmount, "You are exceeding maxBuyTxAmount");
}
}
if (!swapping && sender != pair && fee > 0) swapForFees();
super._transfer(sender, recipient, amount - fee);
if(fee > 0) super._transfer(sender, address(this) ,fee);
}
function swapForFees() private inSwap {
uint256 contractBalance = balanceOf(address(this));
if (contractBalance >= swapThreshold) {
uint256 toSwap = contractBalance;
swapTokensForETH(toSwap);
uint256 marketingAmt = address(this).balance;
if(marketingAmt > 0){
payable(marketingWallet).sendValue(marketingAmt);
}
}
}
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 rescueERC20(address tokenAddress, uint256 amount) external onlyOwner{
IERC20(tokenAddress).transfer(marketingWallet, amount);
}
function rescueETH(uint256 weiAmount) external onlyOwner{
payable(marketingWallet).sendValue(weiAmount);
}
function manualSwap(uint256 amount, uint256 marketingPercentage) external onlyOwner{
uint256 initBalance = address(this).balance;
swapTokensForETH(amount);
uint256 newBalance = address(this).balance - initBalance;
if(marketingPercentage > 0) payable(marketingWallet).sendValue(newBalance * marketingPercentage / ( marketingPercentage));
}
receive() external payable {}
}
