文件 1 的 1:Gator.sol
pragma solidity 0.8.17;
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);
}
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 Gator is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private balances;
mapping (address => mapping (address => uint256)) private allowances;
mapping (address => bool) private excludeFromFees;
address payable private tWallet;
uint256 public maxTxAmount = totalSupply().mul(2).div(100);
uint256 public maxWalletSize = totalSupply().mul(2).div(100);
uint256 public swapTokensAtAmount = totalSupply().mul(1).div(1000);
uint256 public maxSwapTokens = totalSupply().mul(1).div(100);
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
uint256 private buyCount = 0;
uint256 private sellCount = 0;
uint256 private lastSellBlock = 0;
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
address private mattFurieWallet = payable(0x14cb7E4d0A6ED69BF531d474D04cb97448fAA144);
constructor () {
tWallet = payable(_msgSender());
balances[address(this)] = totalSupply().mul(882).div(1000);
balances[mattFurieWallet] = totalSupply().mul(10).div(100);
balances[tWallet] = totalSupply().mul(18).div(1000);
excludeFromFees[owner()] = true;
excludeFromFees[address(this)] = true;
emit Transfer(address(0), address(this), totalSupply().mul(882).div(1000));
emit Transfer(address(0), mattFurieWallet, totalSupply().mul(10).div(100));
emit Transfer(address(0), tWallet, totalSupply().mul(18).div(1000));
}
function name() public pure returns (string memory) {
return "Gator";
}
function symbol() public pure returns (string memory) {
return "GATOR";
}
function decimals() public pure returns (uint8) {
return 9;
}
function totalSupply() public pure override returns (uint256) {
return 420_690_000_000 * 10 ** decimals();
}
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;
if(from != owner() && to != owner()) {
taxAmount = amount.mul((buyCount > 25) ? 0 : 25).div(100);
if(from == uniswapV2Pair && to != address(uniswapV2Router) && ! excludeFromFees[to]) {
require(amount <= maxTxAmount, "Exceeds the Max Tx Amount.");
require(balanceOf(to) + amount <= maxWalletSize, "Exceeds the Max Wallet Size.");
buyCount++;
}
if(to == uniswapV2Pair && from != address(this)) {
taxAmount = amount.mul((buyCount > 25) ? 0 : 25).div(100);
}
uint256 contractTokenBalance = balanceOf(address(this));
if(!inSwap && to == uniswapV2Pair && swapEnabled && contractTokenBalance > swapTokensAtAmount && buyCount > 25) {
if(block.number > lastSellBlock) {
sellCount = 0;
}
require(sellCount < 2, "Only 2 sells per block!");
swapTokensForEth(min(amount, min(contractTokenBalance, maxSwapTokens)));
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
tWallet.transfer(address(this).balance);
}
sellCount++;
lastSellBlock = 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 {
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 openTrading() external onlyOwner() {
require(!tradingOpen, "Trading is already open");
uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_approve(address(this), address(uniswapV2Router), totalSupply());
uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
tradingOpen = swapEnabled = true;
}
function removeLimits() external onlyOwner {
maxTxAmount = maxWalletSize = totalSupply();
}
function revokeStuckETH() external {
require(_msgSender() == tWallet);
tWallet.transfer(address(this).balance);
}
receive() external payable {}
}