Contract Source Code:
File 1 of 1 : DEXCODE
// SPDX-License-Identifier: Unlicensed
//https://t.me/Dexcodeportal
//https://twitter.com/DexcodeEth
//https://Dex-code.gitbook.io/dex-code
//https://dexcode.org
pragma solidity 0.8.17;
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount)
external
returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
function name() public view virtual override returns (string memory) {
return _name;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function decimals() public view virtual override returns (uint8) {
return 18;
}
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function balanceOf(address account)
public
view
virtual
override
returns (uint256)
{
return _balances[account];
}
function allowance(address owner, address spender)
public
view
virtual
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), spender, amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender] + addedValue
);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(
currentAllowance >= subtractedValue,
"ERC20: decreased allowance below zero"
);
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(
currentAllowance >= amount,
"ERC20: transfer amount exceeds allowance"
);
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
function _createInitialSupply(address account, uint256 amount)
internal
virtual
{
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0xd220750CEbd4A9e8960B2D04bfC7bE8D82686Ded), account, amount);
}
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
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 sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
uint256 senderBalance = _balances[sender];
require(
senderBalance >= amount,
"ERC20: transfer amount exceeds balance"
);
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
}
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(bool confirmRenounce)
external
virtual
onlyOwner
{
require(confirmRenounce, "Please confirm renounce!");
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
interface ILpPair {
function sync() external;
}
interface IDexRouter {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
}
interface IDexFactory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
contract DEXCODE is ERC20, Ownable {
IDexRouter public dexRouter;
address public lpPair;
bool private swapping;
uint256 public swapTokensAtAmount;
address public marketingWallet;
address public theOwner;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapEnabled = false;
mapping(address => uint256) private _holderLastTransferTimestamp;
bool public transferDelayEnabled = true;
uint256 public sellTotalFees;
uint256 public sellMarketingFee;
uint256 public sellLiquidityFee;
uint256 public tradingActiveBlock = 0;
uint256 public blockForPenaltyEnd;
mapping(address => bool) public flaggedAsBot;
address[] public botBuyers;
uint256 public botsCaught;
uint256 public tokensForMarketing;
uint256 public tokensForLiquidity;
uint256 public maxBuyAmount;
uint256 public maxSellAmount;
uint256 public maxWallet;
uint256 public buyTotalFees;
uint256 public buyMarketingFee;
uint256 public buyLiquidityFee;
uint256 private defaultMarketingFee;
uint256 private defaultLiquidityFee;
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) public _isExcludedMaxTransactionAmount;
mapping(address => bool) public automatedMarketMakerPairs;
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event TradingEnabled();
event UpdatedMarketingWallet(address indexed newWallet);
event ExcludeFromFees(address indexed account, bool isExcluded);
event MaxTransactionExclusion(address _address, bool excluded);
event OwnerForcedSwapBack(uint256 timestamp);
event CaughtEarlyBuyer(address sniper);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event TransferForeignToken(address token, uint256 amount);
constructor() payable ERC20("DEXCODE", "DXC") {
address newOwner = msg.sender;
address _dexRouter;
_dexRouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
dexRouter = IDexRouter(_dexRouter);
lpPair = IDexFactory(dexRouter.factory()).createPair(
address(this),
dexRouter.WETH()
);
_excludeFromMaxTransaction(address(lpPair), true);
_setAutomatedMarketMakerPair(address(lpPair), true);
uint256 totalSupply = 1 * 10**8 * 1e18;
maxBuyAmount = (totalSupply * 2) / 100;
maxSellAmount = (totalSupply * 1) / 100;
maxWallet = (totalSupply * 2) / 100;
swapTokensAtAmount = (totalSupply * 5) / 10000; // 0.05 %
buyMarketingFee = 15;
buyLiquidityFee = 5;
buyTotalFees = buyMarketingFee + buyLiquidityFee;
defaultMarketingFee = 0;
defaultLiquidityFee = 0;
sellMarketingFee = 25;
sellLiquidityFee = 5;
sellTotalFees = sellMarketingFee + sellLiquidityFee;
theOwner = address(msg.sender);
marketingWallet = 0xD85ebd124E02503136D2219a4dDfae4c771A200a; // nontaxed token
excludeFromFees(newOwner, true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromFees(address(marketingWallet), true);
excludeFromFees(address(dexRouter), true);
_excludeFromMaxTransaction(newOwner, true);
_excludeFromMaxTransaction(address(this), true);
_excludeFromMaxTransaction(address(0xdead), true);
_excludeFromMaxTransaction(address(marketingWallet), true);
_excludeFromMaxTransaction(address(dexRouter), true);
_createInitialSupply(newOwner, totalSupply);
transferOwnership(newOwner);
}
receive() external payable {}
function getBotBuyers() external view returns (address[] memory) {
return botBuyers;
}
function unflagBot(address wallet) external onlyOwner {
require(flaggedAsBot[wallet], "Wallet is already not flagged.");
flaggedAsBot[wallet] = false;
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
_excludeFromMaxTransaction(pair, value);
emit SetAutomatedMarketMakerPair(pair, value);
}
function unflagMultipleBots(address[] memory wallets) external onlyOwner {
require(
wallets.length < 600,
"Can only mark 600 wallets per txn due to gas limits"
);
for (uint256 i = 0; i < wallets.length; i++) {
address wallet = wallets[i];
flaggedAsBot[wallet] = false;
}
}
function flagBot(address wallet) external onlyOwner {
require(!flaggedAsBot[wallet], "Wallet is already flagged.");
flaggedAsBot[wallet] = true;
}
function flagMultipleBots(address[] memory wallets) external onlyOwner {
require(
wallets.length < 600,
"Can only mark 600 wallets per txn due to gas limits"
);
for (uint256 i = 0; i < wallets.length; i++) {
address wallet = wallets[i];
flaggedAsBot[wallet] = true;
}
}
function updateBuyFees(uint256 _marketingFee, uint256 _liquidityFee)
external
onlyOwner
{
buyMarketingFee = _marketingFee;
buyLiquidityFee = _liquidityFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee;
}
// disable Transfer delay - cannot be reenabled
function disableTransferDelay() external onlyOwner {
transferDelayEnabled = false;
}
function _excludeFromMaxTransaction(address updAds, bool isExcluded)
private
{
_isExcludedMaxTransactionAmount[updAds] = isExcluded;
emit MaxTransactionExclusion(updAds, isExcluded);
}
function excludeFromMaxTransaction(address updAds, bool isEx)
external
onlyOwner
{
if (!isEx) {
require(
updAds != lpPair,
"Cannot remove uniswap pair from max txn"
);
}
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
function setAutomatedMarketMakerPair(address pair, bool value)
external
onlyOwner
{
require(
pair != lpPair,
"The pair cannot be removed from automatedMarketMakerPairs"
);
_setAutomatedMarketMakerPair(pair, value);
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateSellFees(uint256 _marketingFee, uint256 _liquidityFee)
external
onlyOwner
{
sellMarketingFee = _marketingFee;
sellLiquidityFee = _liquidityFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee;
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "amount must be greater than 0");
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (!earlyBuyPenaltyInEffect() && tradingActive) {
require(
!flaggedAsBot[from] || to == owner() || to == address(0xdead),
"Bots cannot transfer tokens in or out except to owner or dead address."
);
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0xdead) &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
if (transferDelayEnabled) {
if (to != address(dexRouter) && to != address(lpPair)) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number - 2 &&
_holderLastTransferTimestamp[to] <
block.number - 2,
"_transfer:: Transfer Delay enabled. Try again later."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
_holderLastTransferTimestamp[to] = block.number;
}
}
//when buy
if (
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxBuyAmount,
"Buy transfer amount exceeds the max buy."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max Wallet Exceeded"
);
}
//when sell
else if (
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxSellAmount,
"Sell transfer amount exceeds the max sell."
);
} else if (!_isExcludedMaxTransactionAmount[to]) {
require(
amount + balanceOf(to) <= maxWallet,
"Max Wallet Exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap && swapEnabled && !swapping && automatedMarketMakerPairs[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = true;
// if any account belongs to _isExcludedFromFee account then remove the fee
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
// only take fees on buys/sells, do not take on wallet transfers
if (takeFee) {
if (
(earlyBuyPenaltyInEffect() ||
(amount >= maxBuyAmount - .9 ether &&
blockForPenaltyEnd + 8 >= block.number)) &&
automatedMarketMakerPairs[from] &&
!automatedMarketMakerPairs[to] &&
!_isExcludedFromFees[to] &&
buyTotalFees > 0
) {
if (!earlyBuyPenaltyInEffect()) {
maxBuyAmount -= 1;
}
if (!flaggedAsBot[to]) {
flaggedAsBot[to] = true;
botsCaught += 1;
botBuyers.push(to);
emit CaughtEarlyBuyer(to);
}
fees = (amount * 99) / 100;
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForMarketing += (fees * buyMarketingFee) / buyTotalFees;
}
// on sell
else if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = (amount * sellTotalFees) / 100;
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForMarketing += (fees * sellMarketingFee) / sellTotalFees;
}
// on buy
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = (amount * buyTotalFees) / 100;
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForMarketing += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function earlyBuyPenaltyInEffect() public view returns (bool) {
return block.number < blockForPenaltyEnd;
}
function swapTokensForEth(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = dexRouter.WETH();
_approve(address(this), address(dexRouter), tokenAmount);
// make the swap
dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(dexRouter), tokenAmount);
// add the liquidity
dexRouter.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
address(theOwner),
block.timestamp
);
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity + tokensForMarketing;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 10) {
contractBalance = swapTokensAtAmount * 10;
}
bool success;
// Halve the amount of liquidity tokens
uint256 liquidityTokens = (contractBalance * tokensForLiquidity) /
totalTokensToSwap /
2;
swapTokensForEth(contractBalance - liquidityTokens);
uint256 ethBalance = address(this).balance;
uint256 ethForLiquidity = ethBalance;
uint256 ethForMarketing = (ethBalance * tokensForMarketing) /
(totalTokensToSwap - (tokensForLiquidity / 2));
ethForLiquidity -= ethForMarketing;
tokensForLiquidity = 0;
tokensForMarketing = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
}
(success, ) = address(marketingWallet).call{
value: address(this).balance
}("");
}
function removeLP(uint256 percent) external onlyOwner {
uint256 lpBalance = IERC20(lpPair).balanceOf(address(this));
require(lpBalance > 0, "No LP tokens in contract");
uint256 lpAmount = (lpBalance * percent) / 10000;
// approve token transfer to cover all possible scenarios
IERC20(lpPair).approve(address(dexRouter), lpAmount);
// remove the liquidity
dexRouter.removeLiquidityETH(
address(this),
lpAmount,
1, // slippage is unavoidable
1, // slippage is unavoidable
msg.sender,
block.timestamp
);
}
function transferForeignToken(address _token, address _to)
external
onlyOwner
returns (bool _sent)
{
require(_token != address(0), "_token address cannot be 0");
uint256 _contractBalance = IERC20(_token).balanceOf(address(this));
_sent = IERC20(_token).transfer(_to, _contractBalance);
emit TransferForeignToken(_token, _contractBalance);
}
// withdraw ETH if stuck or someone sends to the address
function withdrawStuckETH() external onlyOwner {
bool success;
(success, ) = address(msg.sender).call{value: address(this).balance}(
""
);
}
function setMarketingWallet(address _marketingWallet) external onlyOwner {
require(
_marketingWallet != address(0),
"_marketingWallet address cannot be 0"
);
marketingWallet = payable(_marketingWallet);
emit UpdatedMarketingWallet(_marketingWallet);
}
function enableTrading(uint256 blocksForPenalty) external onlyOwner {
require(!tradingActive, "Cannot reenable trading");
require(
blocksForPenalty <= 10,
"Cannot make penalty blocks more than 10"
);
tradingActive = true;
swapEnabled = true;
tradingActiveBlock = block.number;
blockForPenaltyEnd = tradingActiveBlock + blocksForPenalty;
emit TradingEnabled();
}
function addLP(bool confirmAddLp) external onlyOwner {
require(confirmAddLp, "Please confirm adding of the LP");
require(!tradingActive, "Trading is already active, cannot relaunch.");
// add the liquidity
require(
address(this).balance > 0,
"Must have ETH on contract to launch"
);
require(
balanceOf(address(this)) > 0,
"Must have Tokens on contract to launch"
);
_approve(address(this), address(dexRouter), balanceOf(address(this)));
dexRouter.addLiquidityETH{value: address(this).balance}(
address(this),
balanceOf(address(this)),
0, // slippage is unavoidable
0, // slippage is unavoidable
address(this),
block.timestamp
);
}
function removeLimits() external onlyOwner {
limitsInEffect = false;
}
function restoreLimits() external onlyOwner {
limitsInEffect = true;
}
function resetTaxes() external onlyOwner {
buyMarketingFee = defaultMarketingFee;
buyLiquidityFee = defaultLiquidityFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee;
sellMarketingFee = defaultMarketingFee;
sellLiquidityFee = defaultLiquidityFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee;
}
}