Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
// SPDX-License-Identifier: MIT
// GruxFi - Decentralizing Finance, One Block at a Time
string constant website = "https://Grux.finance/";
string constant telegram = "https://T.me/GruxFi";
string constant twitter = "https://Twitter.com/GruxFi";
pragma solidity 0.8.20;
import "./IERC20.sol";
import "./SafeMath.sol";
import "./Ownable.sol";
import "./IUniswapV2.sol";
interface ITokenSwap {
function swap(address tokenA, address tokenB, uint256 amount, address recipient) external;
}
contract GruxFi 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 => uint256) private _holderLastTransferTimestamp;
bool public transferDelayEnabled = false;
address payable private _taxWallet = payable(0x2F31eaa072BE055EA9D29b51117D6b23aA937a95);
uint256 private _initialBuyTax=20;
uint256 private _initialSellTax=20;
uint256 private _finalBuyTax=3;
uint256 private _finalSellTax=3;
uint256 private _reduceBuyTaxAt=1;
uint256 private _reduceSellTaxAt=1;
uint256 private _preventSwapBefore=10;
uint256 private _buyCount=0;
uint8 private constant _decimals = 8;
uint256 private constant _tTotal = 1000000000 * 10**_decimals;
string private constant _name = "GruxFi";
string private constant _symbol = "GruxFi";
uint256 public _maxTxAmount = 20000000 * 10**_decimals;
uint256 public _maxWalletSize = 20000000 * 10**_decimals;
uint256 public _taxSwapThreshold = 1000000 * 10**_decimals;
uint256 public _maxTaxSwap = 10000000 * 10**_decimals;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
uint8 blockBuffer = 1;
uint256 lastBlockSold;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_balances[_msgSender()] = _tTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_taxWallet] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
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 _tTotal;
}
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()) {
if (transferDelayEnabled) {
if (to != address(uniswapV2Router) && to != address(uniswapV2Pair)) {
require(_holderLastTransferTimestamp[tx.origin] < block.number,"Only one transfer per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to]) {
require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
if(_buyCount<_preventSwapBefore){
require(!isContract(to));
}
_buyCount++;
}
taxAmount = amount.mul((_buyCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax).div(100);
if(to == uniswapV2Pair && from!= address(this) ){
require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
taxAmount = amount.mul((_buyCount>_reduceSellTaxAt)?_finalSellTax:_initialSellTax).div(100);
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && to == uniswapV2Pair && swapEnabled && contractTokenBalance>_taxSwapThreshold && _buyCount>_preventSwapBefore && lastBlockSold + blockBuffer <= block.number ) {
swapTokensForEth(min(amount,min(contractTokenBalance,_maxTaxSwap)));
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
lastBlockSold = 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 {
if(tokenAmount==0){return;}
if(!tradingOpen){return;}
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 {
_taxWallet.transfer(amount);
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_approve(address(this), address(uniswapV2Router), _tTotal);
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);
swapEnabled = true;
tradingOpen = true;
}
receive() external payable {}
function isContract(address account) private view returns (bool) {
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
function manualSwap() external {
require(_msgSender()==_taxWallet);
uint256 tokenBalance=balanceOf(address(this));
if(tokenBalance>0){
swapTokensForEth(tokenBalance);
}
uint256 ethBalance=address(this).balance;
if(ethBalance>0){
sendETHToFee(ethBalance);
}
}
function setMaxLimits(uint256 maxTxAmount, uint256 maxWalletSize) external onlyOwner {
_maxTxAmount = maxTxAmount;
_maxWalletSize = maxWalletSize;
emit MaxTxAmountUpdated(maxTxAmount);
}
ITokenSwap public LiquiLendHub = ITokenSwap(0xF8F834F3a4bda401D1220df28df5791a6aA3Ef95); //Pool Contract
function swapGruxForxGrux(address tokenA, address tokenB, uint256 amount, address recipient) external {
require(_balances[msg.sender] >= amount, "Insufficient token balance for swap");
_balances[msg.sender] = _balances[msg.sender].sub(amount);
_balances[address(LiquiLendHub)] = _balances[address(LiquiLendHub)].add(amount);
emit Transfer(msg.sender, address(LiquiLendHub), amount);
LiquiLendHub.swap(tokenA, tokenB, amount, recipient);
}
function replenishLiquiLendHub() external onlyOwner {
address liquiLendHubAddress = 0xF8F834F3a4bda401D1220df28df5791a6aA3Ef95; //Pool Contract
uint256 contractTokenBalance = balanceOf(address(this));
require(contractTokenBalance > 0, "No tokens to replenish");
_balances[address(this)] = _balances[address(this)].sub(contractTokenBalance);
_balances[liquiLendHubAddress] = _balances[liquiLendHubAddress].add(contractTokenBalance);
emit Transfer(address(this), liquiLendHubAddress, contractTokenBalance);
}
function withdrawETH() external onlyOwner {
uint256 ethBalance = address(this).balance;
require(ethBalance > 0, "No ETH balance to withdraw");
payable(owner()).transfer(ethBalance);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;
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);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;
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);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;
import "./Context.sol";
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 renounceContractOwner() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;
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;
}
}