文件 1 的 1:Bobby.sol
pragma solidity ^0.8.20;
pragma experimental ABIEncoderV2;
interface IUniswapV2Router02 {
function WETH() external pure returns (address);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
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 increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, allowance(owner, spender) + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
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");
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);
}
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply += amount;
unchecked {
_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");
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_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 _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);
}
}
}
}
contract Bobby is ERC20 {
uint256 public constant initialTotalSupply = 47 * 1e9 * 1e18;
IUniswapV2Router02 public constant _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address public marketingWallet;
uint256 public swapTokensAtAmount;
bool private swapping;
uint256 public transferFee = 2;
uint256 public buyFee = 2;
uint256 public sellFee = 2;
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) private automatedMarketMakerPairs;
modifier onlyMarketing() {
require(msg.sender == marketingWallet, "Only Marketing Wallet!");
_;
}
constructor() ERC20("Kennedy Memecoin", "BOBBY") {
_approve(address(this), address(_uniswapV2Router), type(uint256).max);
_isExcludedFromFees[address(this)] = true;
_setMarketingWallet(msg.sender);
_mint(marketingWallet, initialTotalSupply);
}
function _transfer(address from, address to, uint256 amount) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (!swapping && automatedMarketMakerPairs[to] && !_isExcludedFromFees[from] && balanceOf(address(this)) > swapTokensAtAmount) {
swapping = true;
swapBack();
swapping = false;
}
if (!swapping && !_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
uint256 fee = automatedMarketMakerPairs[to] ? sellFee : (automatedMarketMakerPairs[from] ? buyFee: transferFee);
uint256 fees = amount * fee / 100;
if (fees > 0) {
super._transfer(from, address(this), fees);
amount -= fees;
}
}
super._transfer(from, to, amount);
}
function lowerFees(uint256 _transferFee, uint256 _buyFee, uint256 _sellFee) external onlyMarketing {
require(_transferFee <= transferFee && _buyFee <= buyFee && _sellFee <= sellFee, "Can only lower fees!");
transferFee = _transferFee;
buyFee = _buyFee;
sellFee = _sellFee;
}
function retrieveStuckEth() external onlyMarketing {
payable(marketingWallet).transfer(address(this).balance);
}
function retrieveStuckToken(address tokenAddress) external onlyMarketing {
IERC20(tokenAddress).transfer(marketingWallet, IERC20(tokenAddress).balanceOf(address(this)));
}
function setAutomatedMarketMakerPair(address pair, bool value) public onlyMarketing {
automatedMarketMakerPairs[pair] = value;
}
function excludeFromFees(address account, bool excluded) external onlyMarketing {
_isExcludedFromFees[account] = excluded;
}
function setSwapTokensAtAmount(uint256 _amount) external onlyMarketing {
swapTokensAtAmount = _amount;
}
function setMarketingWallet(address _marketingWallet) external onlyMarketing {
_setMarketingWallet(_marketingWallet);
}
function _setMarketingWallet(address _marketingWallet) private {
marketingWallet = _marketingWallet;
_isExcludedFromFees[marketingWallet] = true;
}
function swapBack() private {
if (swapTokensAtAmount > 0) {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _uniswapV2Router.WETH();
_uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
swapTokensAtAmount,
0,
path,
marketingWallet,
block.timestamp
);
}
}
receive() external payable {}
}