文件 1 的 1:PepeLegend.sol
pragma solidity ^0.8.11;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
library SafeMath {
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;
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_transferOwnership(_msgSender());
}
modifier onlyOwner() {
_checkOwner();
_;
}
function owner() public view virtual returns (address) {
return _owner;
}
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
interface IERC20 {
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
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);
}
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 _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;
unchecked {
_balances[account] += amount;
}
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, 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 {}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
contract PepeLegend is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
address public taxWallet;
bool private swapping;
bool public tradingActive = false;
uint256 public swapTokensAtAmount;
uint256 public maxTransactionAmount;
uint256 public maxWallet;
uint256 public buyFee;
uint256 public sellFee;
mapping(address => bool) private excludedFees;
mapping(address => bool) private excludedMaxTransactionAmount;
mapping(address => bool) private pairs;
constructor() ERC20("Pepe Legend", "PELE") {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
excludedMaxTransactionAmount[address(_uniswapV2Router)] = true;
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
excludedMaxTransactionAmount[address(uniswapV2Pair)] = true;
pairs[address(uniswapV2Pair)] = true;
uint256 totalSupply = 420690000000000 * 10**decimals();
maxTransactionAmount = totalSupply.mul(20).div(1000);
maxWallet = totalSupply.mul(20).div(1000);
swapTokensAtAmount = totalSupply.mul(10).div(10000);
taxWallet = _msgSender();
buyFee = 15;
sellFee = 45;
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(taxWallet, true);
excludeFromFees(address(0xdead), true);
excludedMaxTransactionAmount[owner()] = true;
excludedMaxTransactionAmount[address(this)] = true;
excludedMaxTransactionAmount[taxWallet] = true;
excludedMaxTransactionAmount[address(0xdead)] = true;
_mint(_msgSender(), totalSupply);
}
receive() external payable {}
function openTrading() external onlyOwner {
tradingActive = true;
}
function removeLimits() external onlyOwner {
maxWallet = maxTransactionAmount = totalSupply();
}
function removeFees() external onlyOwner {
buyFee = sellFee = 0;
}
function excludeFromFees(address _address, bool excluded) public onlyOwner {
excludedFees[_address] = excluded;
}
function excludeFromMaxTransaction(address _address, bool excluded) public onlyOwner {
excludedMaxTransactionAmount[_address] = excluded;
}
function _transfer(address from, address to, uint256 amount) internal override {
require(from != address(0), "Transfer from the zero address.");
require(to != address(0), "Transfer to the zero address.");
require(amount > 0, "Transfer amount must be greater than zero.");
if (from != owner() && to != owner() && to != address(0) && to != address(0xdead) && !swapping) {
if (tradingActive == false) {
require(excludedFees[from] || excludedFees[to], "Trading is not active.");
}
if (pairs[from] && !excludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the max transaction amount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded.");
} else if (pairs[to] && !excludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the max transaction amount.");
} else if (!excludedMaxTransactionAmount[to]) {
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded.");
}
}
bool canSwap = balanceOf(address(this)) >= swapTokensAtAmount;
if (canSwap && !swapping && !pairs[from] && !excludedFees[from] && !excludedFees[to]) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (excludedFees[from] || excludedFees[to]) {
takeFee = false;
}
uint256 feeAmount = 0;
if (takeFee) {
if (pairs[to] && sellFee > 0) {
feeAmount = amount.mul(sellFee).div(100);
} else if (pairs[from] && buyFee > 0) {
feeAmount = amount.mul(buyFee).div(100);
}
if (feeAmount > 0) {
super._transfer(from, address(this), feeAmount);
}
amount -= feeAmount;
}
super._transfer(from, to, amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
bool success;
if (contractBalance == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
swapTokensForEth(contractBalance);
(success, ) = address(taxWallet).call{value: address(this).balance}("");
}
}