Contract Source Code:
File 1 of 1 : MEVFree
// SPDX-License-Identifier: MIT
/*
Website:
https://mevfree.com
Telegram:
https://t.me/mevfree
Twitter:
https://twitter.com/mevfree
*/
pragma solidity ^0.8.17;
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 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
);
}
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 balanceOf(address account)
public
view
virtual
override
returns (uint256)
{
return _balances[account];
}
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
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 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 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 _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);
}
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(0), 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);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
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 swapExactTokensForETH(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline)
external
returns (uint[] memory amounts);
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 MEVFree is ERC20, Ownable {
uint256 public maxBuyTokenAmount;
uint256 public maxSellTokenAmount;
uint256 public maxWalletTokenAmount;
IDexRouter public dexRouter;
address public lpPair;
bool private swapping = false;
uint256 public swapTokensAtAmount;
address public devWallet;
address public marketingWallet;
address public rewardsWallet;
uint256 public launchBlock = 0; // 0 means trading is not active
uint public BSL = 0; // blocks since launch
uint256 public blockForLaunchPenaltyEnd;
uint256 public penaltyBlocks = 0;
uint256 public feesLastUpdated = 0;
bool public launchPenaltyPeriod = false;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapBackEnabled = false;
// launch buy fees
uint[10] launchBuyDevFees = [40, 40, 30, 25, 20, 15, 10, 5, 5, 5];
uint[10] launchBuyMarketingFees = [20, 15, 15, 15, 10, 10, 5, 3, 3, 2];
uint[10] launchBuyRewardsFees = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
uint[10] launchBuyLiquidityFees = [20, 15, 15, 10, 10, 5, 5, 2, 2, 1];
uint[10] launchBuyBurnFees = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
// normal buy fees
uint256 private normalBuyDevFee = 4;
uint256 private normalBuyMarketingFee = 1;
uint256 private normalBuyRewardsFee = 0;
uint256 private normalBuyLiquidityFee = 1;
uint256 private normalBuyBurnFee = 0;
// buy fees
uint256 public buyDevFee = 4;
uint256 public buyMarketingFee = 1;
uint256 public buyRewardsFee = 0;
uint256 public buyLiquidityFee = 1;
uint256 public buyBurnFee = 0;
uint256 public buyTotalFees = buyDevFee + buyMarketingFee + buyRewardsFee + buyLiquidityFee + buyBurnFee;
// launch sell fees
uint[10] launchSellDevFees = [40, 40, 30, 25, 20, 15, 10, 5, 5, 5];
uint[10] launchSellMarketingFees = [20, 15, 15, 15, 10, 10, 5, 3, 3, 2];
uint[10] launchSellRewardsFees = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
uint[10] launchSellLiquidityFees = [20, 15, 15, 10, 10, 5, 5, 2, 2, 1];
uint[10] launchSellBurnFees = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
// normal sell fees
uint256 private normalSellDevFee = 4;
uint256 private normalSellMarketingFee = 1;
uint256 private normalSellRewardsFee = 0;
uint256 private normalSellLiquidityFee = 1;
uint256 private normalSellBurnFee = 0;
// sell fees
uint256 public sellDevFee = 4;
uint256 public sellMarketingFee = 1;
uint256 public sellRewardsFee = 0;
uint256 public sellLiquidityFee = 1;
uint256 public sellBurnFee = 0;
uint256 public sellTotalFees = sellDevFee + sellMarketingFee + sellRewardsFee + sellLiquidityFee + sellBurnFee;
// fee token counters
uint256 public tokensForDev;
uint256 public tokensForMarketing;
uint256 public tokensForRewards;
uint256 public tokensForLiquidity;
uint256 public tokensForBurn;
// exlcude from fees and max transaction amount
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) public _isExcludedMaxTransactionAmount;
// store addresses that a automatic market maker pairs. Any transfer *to* these addresses
// could be subject to a maximum transfer amount
mapping(address => bool) public automatedMarketMakerPairs;
// Anti-MEV mappings and variables
mapping(address => uint256) public blocksOfTrades; // to hold the next block that trading is allowed
bool public antiMEVEnabled = true;
bool public antiContractSellEnabled = true;
uint256 public mevBlocks = 2; // blocks to block same account trades from
// mapping to store mev bots or suspected mev bots
// additional mapping to store whitelisted address exempt from antiMEV
mapping (address => bool) public botsOfMEV;
mapping (address => bool) public whitelistedMEV;
// mappings to track those who bought during the higher penalty period
// so that they always have the tax penalty on sell whilst they hold tokens
mapping(address => bool) public launchPenaltyHolder;
mapping(address => uint) public launchPenaltySellFee;
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event EnabledTrading();
event ExcludeFromFees(address indexed account, bool isExcluded);
event UpdatedMaxBuyTokenAmount(uint256 newAmount);
event UpdatedMaxSellTokenAmount(uint256 newAmount);
event UpdatedMaxWalletTokenAmount(uint256 newAmount);
event UpdatedDevWallet(address indexed newWallet);
event UpdatedMarketingWallet(address indexed newWallet);
event UpdatedRewardsWallet(address indexed newWallet);
event MaxTransactionExclusion(address _address, bool excluded);
event OwnerForcedSwapBackAndBurn(uint256 timestamp);
event OwnerForcedSwapOfTokens(uint256 timestamp);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event AutoNukeLP();
event ManualNukeLP();
event Burn(address indexed user, uint256 amount);
event TransferForeignToken(address token, uint256 amount);
constructor() payable ERC20("MEVFree", "MEVFree") {
address newOwner = msg.sender; // can leave alone if owner is deployer.
address _dexRouter;
_dexRouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D; // Uniswap V2 Router
// initialize router
dexRouter = IDexRouter(_dexRouter);
// create pair
lpPair = IDexFactory(dexRouter.factory()).createPair(
address(this),
dexRouter.WETH()
);
_setAutomatedMarketMakerPair(address(lpPair), true);
_excludeFromMaxTransaction(lpPair, true);
automatedMarketMakerPairs[lpPair] = true;
uint256 totalSupply = 100 * 1e6 * 1e18; // 100 million
maxBuyTokenAmount = (totalSupply * 1) / 100; // 1%
maxSellTokenAmount = (totalSupply * 1) / 100; // 1%
maxWalletTokenAmount = (totalSupply * 2) / 100; // 2%
swapTokensAtAmount = (totalSupply * 5) / 10000; // 0.05 %
// set wallets - assume deployer is the dev
devWallet = address(0x18234cA263bfE40ACB395119ABFFC5c80f31153A);
marketingWallet = address(0x4098BE3E6b13cAEF10373cB398200fdbd4F5f5a3);
rewardsWallet = address(0x1A23560fb2946Ab8Fb4056a25834061D8594936C);
_excludeFromMaxTransaction(address(this), true);
_excludeFromMaxTransaction(address(0xdead), true);
_excludeFromMaxTransaction(address(newOwner), true);
_excludeFromMaxTransaction(address(devWallet), true);
_excludeFromMaxTransaction(address(marketingWallet), true);
_excludeFromMaxTransaction(address(rewardsWallet), true);
_excludeFromMaxTransaction(address(dexRouter), true);
_excludeFromMaxTransaction(address(0xa4fD37C3916824a974df5FA6e136A8Fc7e58044E), true); // Team
_excludeFromMaxTransaction(address(0x3C507DC5C57c31fB9C61BB75471B19B71bf16a95), true); // Presale
excludeFromFees(newOwner, true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromFees(address(devWallet), true);
excludeFromFees(address(marketingWallet), true);
excludeFromFees(address(rewardsWallet), true);
excludeFromFees(address(dexRouter), true);
excludeFromFees(address(0xa4fD37C3916824a974df5FA6e136A8Fc7e58044E),true); // Team
_createInitialSupply(address(this), (totalSupply * 20) / 100); // Tokens for liquidity
_createInitialSupply(address(rewardsWallet),(totalSupply * 15) / 100); // Rewards
_createInitialSupply(address(0xa4fD37C3916824a974df5FA6e136A8Fc7e58044E),(totalSupply * 10) / 100); // Team
_createInitialSupply(address(0x3C507DC5C57c31fB9C61BB75471B19B71bf16a95),(totalSupply * 35) / 100); // Presale
_createInitialSupply(address(newOwner),(totalSupply * 20) / 100); //Additional Liquidity etc
transferOwnership(newOwner);
}
receive() external payable {}
function emergencyUpdateRouter(address router) external onlyOwner {
require(!tradingActive, "Cannot update after trading is active");
dexRouter = IDexRouter(router);
}
function setAntiMEVMode(bool setting) external onlyOwner {
antiMEVEnabled = setting;
}
function setAntiContractSellMode(bool setting) external onlyOwner {
antiContractSellEnabled = setting;
}
function setMEVBlocks(uint256 _mevBlocks) external onlyOwner {
require(_mevBlocks < 8,"Cannot make _mevBlocks more that 8");
mevBlocks = _mevBlocks;
}
// clear state for individual bots
function clearMEVBot(address bot) external onlyOwner {
botsOfMEV[bot] = false;
}
// clear state for bulk bots
function removeMEVBots(address[] calldata bots_) external onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
botsOfMEV[bots_[i]] = false;
}
}
// set state for whitelisted address to pass mev checks
function setWhitelist(address addr, bool state) external onlyOwner {
whitelistedMEV[addr] = state;
}
// clear state for individual bots
function clearLaunchPenaltyState(address penaltyAddress) external onlyOwner {
launchPenaltyHolder[penaltyAddress] = false;
launchPenaltySellFee[penaltyAddress] = 0;
}
function updateMaxBuyTokenAmount(uint256 newMaxBuy) external onlyOwner {
require(
newMaxBuy >= ((totalSupply() * 5) / 1000) / 1e18,
"Cannot set max buy token amount lower than 0.5%"
);
require(
newMaxBuy <= ((totalSupply() * 2) / 100) / 1e18,
"Cannot set max buy token amount higher than 2%"
);
maxBuyTokenAmount = newMaxBuy * (10**18);
emit UpdatedMaxBuyTokenAmount(maxBuyTokenAmount);
}
function updateMaxSellTokenAmount(uint256 newMaxSell) external onlyOwner {
require(
newMaxSell >= ((totalSupply() * 5) / 1000) / 1e18,
"Cannot set max sell token amount lower than 0.5%"
);
require(
newMaxSell <= ((totalSupply() * 2) / 100) / 1e18,
"Cannot set max sell token amount higher than 2%"
);
maxSellTokenAmount = newMaxSell * (10**18);
emit UpdatedMaxSellTokenAmount(maxSellTokenAmount);
}
function updateMaxWalletTokenAmount(uint256 newMaxWallet) external onlyOwner {
require(
newMaxWallet >= ((totalSupply() * 5) / 1000) / 1e18,
"Cannot set max wallet token amount lower than 0.5%"
);
require(
newMaxWallet <= ((totalSupply() * 5) / 100) / 1e18,
"Cannot set max wallet token amount higher than 5%"
);
maxWalletTokenAmount = newMaxWallet * (10**18);
emit UpdatedMaxWalletTokenAmount(maxWalletTokenAmount);
}
// change the minimum amount of tokens to sell from fees
function updateSwapTokensAtAmount(uint256 newSwapAmount) external onlyOwner {
require(
newSwapAmount >= (totalSupply() * 1) / 100000,
"Swap amount cannot be lower than 0.001% total supply."
);
require(
newSwapAmount <= (totalSupply() * 1) / 1000,
"Swap amount cannot be higher than 0.1% total supply."
);
swapTokensAtAmount = newSwapAmount;
}
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 excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
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 _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
_excludeFromMaxTransaction(pair, value);
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateBuyFees(
uint256 _devFee,
uint256 _marketingFee,
uint256 _rewardsFee,
uint256 _liquidityFee,
uint256 _burnFee
) external onlyOwner {
buyDevFee = _devFee;
buyMarketingFee = _marketingFee;
buyRewardsFee = _rewardsFee;
buyLiquidityFee = _liquidityFee;
buyBurnFee = _burnFee;
buyTotalFees = buyDevFee + buyMarketingFee + buyRewardsFee + buyLiquidityFee + buyBurnFee;
require(buyTotalFees <= 15, "Must keep buy fees at 15% or less");
}
function updateSellFees(
uint256 _devFee,
uint256 _marketingFee,
uint256 _rewardsFee,
uint256 _liquidityFee,
uint256 _burnFee
) external onlyOwner {
sellDevFee = _devFee;
sellMarketingFee = _marketingFee;
sellRewardsFee = _rewardsFee;
sellLiquidityFee = _liquidityFee;
sellBurnFee = _burnFee;
sellTotalFees = sellDevFee + sellMarketingFee + sellRewardsFee + sellLiquidityFee + sellBurnFee;
require(sellTotalFees <= 25, "Must keep sell fees at 25% or less");
}
function taxToNormal() external onlyOwner {
buyDevFee = normalBuyDevFee;
buyMarketingFee = normalBuyMarketingFee;
buyRewardsFee = normalBuyRewardsFee;
buyLiquidityFee = normalBuyLiquidityFee;
buyBurnFee = normalBuyBurnFee;
buyTotalFees = buyDevFee + buyMarketingFee + buyRewardsFee + buyLiquidityFee + buyBurnFee;
sellDevFee = normalSellDevFee;
sellMarketingFee = normalSellMarketingFee;
sellRewardsFee = normalSellRewardsFee;
sellLiquidityFee = normalSellLiquidityFee;
sellBurnFee = normalSellBurnFee;
sellTotalFees = sellDevFee + sellMarketingFee + sellRewardsFee + sellLiquidityFee + sellBurnFee;
}
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."
);
}
bool _isBuying = automatedMarketMakerPairs[from] && to != address(dexRouter);
bool _isSelling = automatedMarketMakerPairs[to] && from != address(this);
bool _mevBot = false;
// anti MEV mode blocks trades from the same sender more often than every x blocks
// if a mev bot is detected then they are added to the botsOfMEV list and not able to sell
// while unlikely, this can block multi block mev from happening, and trap the mev bot buy
if (antiMEVEnabled) {
if (_isBuying) {
// flag next block allowed for trading
blocksOfTrades[to] = block.number;
//blocksOfTrades[msg.sender] = block.number;
} else if (_isSelling && !whitelistedMEV[from]) {
// check to see if seller has been flagged as a mev bot previously and block the sell :)
// mev bot status can be manually removed by owner but not set for safety
if ((block.number < (blocksOfTrades[from] + mevBlocks)) && (block.number < (blocksOfTrades[msg.sender] + mevBlocks))) {
if (!botsOfMEV[from] || !botsOfMEV[msg.sender]) {
botsOfMEV[from] = true;
botsOfMEV[msg.sender] = true;
}
_mevBot = true;
}
if (botsOfMEV[from] && botsOfMEV[msg.sender]) {
_mevBot = true;
}
if (from == msg.sender && antiContractSellEnabled) {
botsOfMEV[from] = true;
botsOfMEV[msg.sender] = true;
_mevBot = true;
}
}
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0xdead) &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
//when buy
if (_isBuying && !_isExcludedMaxTransactionAmount[to])
{
require(
amount <= maxBuyTokenAmount,
"Buy transfer amount exceeds the max buy."
);
require(
amount + balanceOf(to) <= maxWalletTokenAmount,
"Max Wallet Exceeded"
);
}
//when sell
else if (_isSelling && !_isExcludedMaxTransactionAmount[from])
{
require(
amount <= maxSellTokenAmount,
"Sell transfer amount exceeds the max sell."
);
}
// else simple transfer
else if (!_isExcludedMaxTransactionAmount[to]) {
require(
amount + balanceOf(to) <= maxWalletTokenAmount,
"Max Wallet Exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool okToSwapBack = contractTokenBalance >= swapTokensAtAmount;
bool takeFee = true;
// if any account belongs to _isExcludedFromFee we do not take any fees
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
// only take fees on buys/sells, do not take on wallet transfers
if (takeFee) {
uint256 fees = 0;
// early buying bot/sniper penalty.
if (launchPenaltyPeriod) {
if (feesLastUpdated < block.number) {
updateEarlyPenaltyFees();
}
if (_isBuying && !launchPenaltyHolder[to]) {
launchPenaltyHolder[to] = true;
launchPenaltySellFee[to] = sellTotalFees;
}
}
// on sell
if (_isSelling) {
if (okToSwapBack && swapBackEnabled && !swapping) {
swapping = true;
swapBackAndBurn();
swapping = false;
}
// on sell if launch penalty holder then tax according to
// the sell taxes at the time of the eoriginal buy
if (launchPenaltyHolder[from]) {
uint _penaltySellFee = launchPenaltySellFee[from];
fees = (amount * _penaltySellFee) / 100;
tokensForDev += fees;
}
// on normal sell
else if (sellTotalFees > 0) {
fees = (amount * sellTotalFees) / 100;
tokensForDev += (fees * sellDevFee) / sellTotalFees;
tokensForMarketing += (fees * sellMarketingFee) / sellTotalFees;
tokensForRewards += (fees * sellRewardsFee) / sellTotalFees;
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForBurn += (fees * sellBurnFee) / sellTotalFees;
}
}
// on buy
else if (_isBuying && buyTotalFees > 0) {
fees = (amount * buyTotalFees) / 100;
tokensForDev += (fees * buyDevFee) / buyTotalFees;
tokensForMarketing += (fees * buyMarketingFee) / buyTotalFees;
tokensForRewards += (fees * buyRewardsFee) / buyTotalFees;
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForBurn += (fees * buyBurnFee) / buyTotalFees;
}
// on Transfer
else {
// if from wallet has penalties then we also apply to the
// wallet being transferred to
if (launchPenaltyHolder[from]) {
launchPenaltyHolder[to] = true;
launchPenaltySellFee[to] = launchPenaltySellFee[from];
}
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
if (!_mevBot || (_mevBot && _isBuying)) {
super._transfer(from, to, amount);
}
}
function updateEarlyPenaltyFees() private {
if (block.number == launchBlock) {
buyDevFee = launchBuyDevFees[0];
buyMarketingFee = launchBuyMarketingFees[0];
buyRewardsFee = launchBuyRewardsFees[0];
buyLiquidityFee = launchBuyLiquidityFees[0];
buyBurnFee = launchBuyBurnFees[0];
buyTotalFees = buyDevFee + buyMarketingFee + buyRewardsFee + buyLiquidityFee + buyBurnFee;
sellDevFee = launchSellDevFees[0];
sellMarketingFee = launchSellMarketingFees[0];
sellRewardsFee = launchSellRewardsFees[0];
sellLiquidityFee = launchSellLiquidityFees[0];
sellBurnFee = launchSellBurnFees[0];
sellTotalFees = sellDevFee + sellMarketingFee + sellRewardsFee + sellLiquidityFee + sellBurnFee;
} else if (block.number < blockForLaunchPenaltyEnd) {
//BSL = (block.number - launchBlock); // BlocksSinchLaunch
BSL = (block.number - launchBlock) <= 9 ? (block.number - launchBlock) : 9;
buyDevFee = launchBuyDevFees[BSL] > normalBuyDevFee ? launchBuyDevFees[BSL] : normalBuyDevFee;
buyMarketingFee = launchBuyMarketingFees[BSL] > normalBuyMarketingFee ? launchBuyMarketingFees[BSL] : normalBuyMarketingFee;
buyRewardsFee = launchBuyRewardsFees[BSL] > normalBuyRewardsFee ? launchBuyRewardsFees[BSL] : normalBuyRewardsFee;
buyLiquidityFee = launchBuyLiquidityFees[BSL] > normalBuyLiquidityFee ? launchBuyLiquidityFees[BSL] : normalBuyLiquidityFee;
buyBurnFee = launchBuyBurnFees[BSL] > normalBuyBurnFee ? launchBuyBurnFees[BSL] : normalBuyBurnFee;
buyTotalFees = buyDevFee + buyMarketingFee + buyRewardsFee + buyLiquidityFee + buyBurnFee;
sellDevFee = launchSellDevFees[BSL] > normalSellDevFee ? launchSellDevFees[BSL] : normalSellDevFee;
sellMarketingFee = launchSellMarketingFees[BSL] > normalSellMarketingFee ? launchSellMarketingFees[BSL] : normalSellMarketingFee;
sellRewardsFee = launchSellRewardsFees[BSL] > normalSellRewardsFee ? launchSellRewardsFees[BSL] : normalSellRewardsFee;
sellLiquidityFee = launchSellLiquidityFees[BSL] > normalSellLiquidityFee ? launchSellLiquidityFees[BSL] : normalSellLiquidityFee;
sellBurnFee = launchSellBurnFees[BSL] > normalSellBurnFee ? launchSellBurnFees[BSL] : normalSellBurnFee;
sellTotalFees = sellDevFee + sellMarketingFee + sellRewardsFee + sellLiquidityFee + sellBurnFee;
} else if ((block.number >= blockForLaunchPenaltyEnd) && launchPenaltyPeriod) {
buyDevFee = normalBuyDevFee;
buyMarketingFee = normalBuyMarketingFee;
buyRewardsFee = normalBuyRewardsFee;
buyLiquidityFee = normalBuyLiquidityFee;
buyBurnFee = normalBuyBurnFee;
buyTotalFees = buyDevFee + buyMarketingFee + buyRewardsFee + buyLiquidityFee + buyBurnFee;
sellDevFee = normalSellDevFee;
sellMarketingFee = normalSellMarketingFee;
sellRewardsFee = normalSellRewardsFee;
sellLiquidityFee = normalSellLiquidityFee;
sellBurnFee = normalSellBurnFee;
sellTotalFees = sellDevFee + sellMarketingFee + sellRewardsFee + sellLiquidityFee + sellBurnFee;
launchPenaltyPeriod = false;
}
feesLastUpdated = block.number;
}
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.swapExactTokensForETH(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidityAndBurn(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(0xdead),
block.timestamp
);
}
function swapBackAndBurn() private {
uint256 contractBalance = balanceOf(address(this));
bool success;
if (tokensForBurn > 0) {
if (tokensForBurn > contractBalance) {
tokensForBurn = contractBalance;
}
_burnWithEvent(address(this), tokensForBurn);
contractBalance = balanceOf(address(this));
}
uint256 totalTokensToSwap = tokensForDev +
tokensForMarketing +
tokensForRewards +
tokensForLiquidity;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
// limit max number of tokens to swap this
// occurs if no sells have happened in a while
// limiting it this low ensure that no slippage
// issues or "router clogs" happen
if (contractBalance > swapTokensAtAmount * 5) {
contractBalance = swapTokensAtAmount * 5;
}
// Halve the amount of liquidity tokens
uint256 liquidityTokens = (contractBalance * tokensForLiquidity) /
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance - liquidityTokens;
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance - initialETHBalance;
uint256 ethForDev = (ethBalance * tokensForDev) / totalTokensToSwap;
uint256 ethForMarketing = (ethBalance * tokensForMarketing) / totalTokensToSwap;
uint256 ethForRewards = (ethBalance * tokensForRewards) / totalTokensToSwap;
uint256 ethForLiquidity = ethBalance - ethForDev - ethForMarketing - ethForRewards;
tokensForDev = 0;
tokensForMarketing = 0;
tokensForRewards = 0;
tokensForLiquidity = 0;
tokensForBurn = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidityAndBurn(liquidityTokens, ethForLiquidity);
}
(success, ) = address(marketingWallet).call{value: ethForMarketing}("");
(success, ) = address(rewardsWallet).call{value: ethForRewards}("");
(success, ) = address(devWallet).call{value: address(this).balance}("");
}
function burn(uint256 _amount) external {
_burnWithEvent(msg.sender, _amount);
}
function _burnWithEvent(address _user, uint256 _amount) internal {
_burn(_user, _amount);
emit Burn(_user, _amount);
}
function transferForeignToken(address _token, address _to)
external
onlyOwner
returns (bool _sent)
{
require(_token != address(0), "_token address cannot be 0");
require(
_token != address(this) || !tradingActive,
"Can't withdraw native tokens while trading is active"
);
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 setDevWallet(address _devWallet) external onlyOwner
{
require(_devWallet != address(0),"_devWallet address cannot be 0");
devWallet = payable(_devWallet);
emit UpdatedDevWallet(_devWallet);
}
function setMarketingWallet(address _marketingWallet) external onlyOwner {
require(_marketingWallet != address(0),"_marketingWallet address cannot be 0");
marketingWallet = payable(_marketingWallet);
emit UpdatedMarketingWallet(_marketingWallet);
}
function setRewardsWallet(address _rewardsWallet) external onlyOwner {
require(_rewardsWallet != address(0),"_rewardsWallet address cannot be 0");
rewardsWallet = payable(_rewardsWallet);
emit UpdatedRewardsWallet(_rewardsWallet);
}
// force Swap back and burn if slippage issues.
function forceSwapBackAndBurn() external onlyOwner {
require(
balanceOf(address(this)) >= swapTokensAtAmount,
"Can only swap when token amount is at or higher than swapTokensAtAmount"
);
swapping = true;
swapBackAndBurn();
swapping = false;
emit OwnerForcedSwapBackAndBurn(block.timestamp);
}
// only use to disable contract sales if absolutely necessary (emergency use only)
function updateSwapBackEnabled(bool enabled) external onlyOwner {
swapBackEnabled = enabled;
}
// remove trading limits
function removeLimits() external onlyOwner {
limitsInEffect = false;
}
function restoreLimits() external onlyOwner {
limitsInEffect = true;
}
// combined function to autmatically add and create the initial LP and enable trading
function addLPEnableTradingWithLaunchPenalty(uint256 blocksForPenalty, bool confirmLaunch) external onlyOwner {
require(!tradingActive, "Trading is already active, cannot relaunch.");
require(blocksForPenalty <= 10,"Cannot make penalty blocks more than 10");
require(confirmLaunch, "Please confirm go time!");
// 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");
//standard enable trading action
tradingActive = true;
swapBackEnabled = true;
launchBlock = block.number;
blockForLaunchPenaltyEnd = blocksForPenalty > 0 ? launchBlock + blocksForPenalty : launchBlock;
penaltyBlocks = blocksForPenalty > 0 ? blocksForPenalty : 0;
launchPenaltyPeriod = blocksForPenalty > 0 ? true : false;
emit EnabledTrading();
_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
msg.sender,
block.timestamp
);
}
// add and create initial LP
function addLP(bool _addLP) external onlyOwner {
require(_addLP, "Please confirm add LP");
// 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
msg.sender,
block.timestamp
);
}
// classic enable trading with no launch penalty period:
function enableTrading() external onlyOwner {
require(!tradingActive, "Trading is already active, cannot relaunch.");
//standard enable trading action
tradingActive = true;
swapBackEnabled = true;
launchBlock = block.number;
penaltyBlocks = 0;
blockForLaunchPenaltyEnd = launchBlock;
launchPenaltyPeriod = false;
emit EnabledTrading();
}
}