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// This contract is part of Zellic’s smart contract dataset, which is a collection of publicly available contract code gathered as of March 2023.
// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;
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. C U ON THE MOON
*/
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) internal _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 internal _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()];
if(currentAllowance != type(uint256).max) {
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 _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);
}
}
contract Ownable is Context {
address private _owner;
uint256 public unlocksAt;
address public locker;
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);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function lockContract(uint256 _days) external onlyOwner {
require(locker == address(0), "Contract already locked");
require(_days > 0, "No lock period specified");
unlocksAt = block.timestamp + (_days * 1 days);
locker = owner();
renounceOwnership();
}
function unlockContract() external {
require(locker != address(0) && msg.sender == locker, "Caller is not authorized");
require(unlocksAt <= block.timestamp, "Contract still locked");
emit OwnershipTransferred(address(0), locker);
_owner = locker;
locker = address(0);
unlocksAt = 0;
}
}
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 swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
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);
}
interface IDexFactory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
contract Mutt is ERC20, Ownable {
IDexRouter public dexRouter;
address public lpPair;
uint8 constant _decimals = 9;
uint256 constant _decimalFactor = 10 ** _decimals;
bool private swapping;
uint256 public swapTokensAtAmount;
address public taxAddress;
address public lpAddress;
address public teamAddress;
bool public swapEnabled = true;
bool public marketingBuyFees = true;
bool public liquidityBuyFees = true;
bool public teamBuyFees = true;
bool public marketingSellFees = true;
bool public liquiditySellFees = true;
bool public teamSellFees = true;
uint256 targetLiquidity = 10;
uint256 targetLiquidityDenominator = 100;
uint256 public maxWalletSize;
uint256 public tradingActiveTime;
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) public pairs;
event SetPair(address indexed pair, bool indexed value);
event ExcludeFromFees(address indexed account, bool isExcluded);
event TargetLiquiditySet(uint256 percent);
constructor(address newOwner, address marketing, address team) ERC20("Mutt", "MUTT") payable {
// initialize router
address routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
dexRouter = IDexRouter(routerAddress);
_approve(newOwner, routerAddress, type(uint256).max);
_approve(address(this), routerAddress, type(uint256).max);
uint256 totalSupply = 1_000_000_000_000 * _decimalFactor;
maxWalletSize = totalSupply / 50;
swapTokensAtAmount = (totalSupply * 5) / 10000; // 0.05 %
taxAddress = marketing;
teamAddress = team;
lpAddress = address(0xdead);
excludeFromFees(newOwner, true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
_balances[address(this)] = totalSupply;
_totalSupply = totalSupply;
emit Transfer(address(0), address(this), totalSupply);
transferOwnership(msg.sender);
}
receive() external payable {}
function decimals() public pure override returns (uint8) {
return 9;
}
function toggleSwap() external onlyOwner {
swapEnabled = !swapEnabled;
}
function setPair(address pair, bool value) external onlyOwner {
require(pair != lpPair,"The pair cannot be removed from pairs");
pairs[pair] = value;
emit SetPair(pair, value);
}
function toggleMarketingFees(bool sellFee) external onlyOwner {
if(sellFee)
marketingSellFees = !marketingSellFees;
else
marketingBuyFees = !marketingBuyFees;
}
function toggleLiquidityFees(bool sellFee) external onlyOwner {
if(sellFee)
liquiditySellFees = !liquiditySellFees;
else
liquidityBuyFees = !liquidityBuyFees;
}
function toggleTeamFees(bool sellFee) external onlyOwner {
if(sellFee)
teamSellFees = !teamSellFees;
else
teamBuyFees = !teamBuyFees;
}
function getSellFees() public view returns (uint256) {
uint256 _sf = 0;
if(marketingSellFees) _sf += 2;
if(liquiditySellFees) _sf += 1;
if(teamSellFees) _sf += 2;
return _sf;
}
function getBuyFees() public view returns (uint256) {
uint256 elapsed = block.timestamp - tradingActiveTime;
if(elapsed <= 1 minutes) {
uint256 taxReduced = (elapsed / 10) * 10;
if (taxReduced < 90)
return 90 - taxReduced;
}
uint256 _bf = 0;
if(marketingBuyFees) _bf += 2;
if(liquidityBuyFees) _bf += 2;
if(teamBuyFees) _bf += 2;
return _bf;
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function checkWalletLimit(address recipient, uint256 amount) internal view {
require(balanceOf(recipient) + amount <= maxWalletSize, "Transfer amount exceeds the bag size.");
}
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 (tradingActiveTime > 0 && !_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
if (!pairs[to] && to != address(0xdead)) {
checkWalletLimit(to, amount);
}
uint256 fees = 0;
uint256 _sf = getSellFees();
uint256 _bf = getBuyFees();
if (swapEnabled && !swapping && pairs[to] && _bf + _sf > 0) {
swapping = true;
swapBack(amount);
swapping = false;
}
if (pairs[to] &&_sf > 0) {
fees = (amount * _sf) / 100;
}
else if (_bf > 0 && pairs[from]) {
fees = (amount * _bf) / 100;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
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();
// make the swap
dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function swapBack(uint256 amount) private {
uint256 amountToSwap = balanceOf(address(this));
if (amountToSwap < swapTokensAtAmount) return;
if (amountToSwap > swapTokensAtAmount * 10) amountToSwap = swapTokensAtAmount * 10;
if (amountToSwap > amount) amountToSwap = amount;
if (amountToSwap == 0) return;
uint256 _lpFee = (liquidityBuyFees ? 2 : 0) + (liquiditySellFees ? 2 : 0);
uint256 _mkFee = (marketingBuyFees ? 4 : 0) + (marketingSellFees ? 4 : 0);
uint256 _tmFee = (teamBuyFees ? 4 : 0) + (teamSellFees ? 4 : 0);
uint256 dynamicLiquidityFee = isOverLiquified(targetLiquidity, targetLiquidityDenominator) ? 0 : _lpFee;
uint256 _totalFees = dynamicLiquidityFee + _mkFee + _tmFee;
uint256 amountToLiquify = ((amountToSwap * dynamicLiquidityFee) / _totalFees) / 2;
amountToSwap -= amountToLiquify;
bool success;
swapTokensForEth(amountToSwap);
uint256 ethBalance = address(this).balance;
_totalFees -= dynamicLiquidityFee / 2;
uint256 amountLiquidity = (ethBalance * dynamicLiquidityFee) / _totalFees / 2;
uint256 amountTeam = (ethBalance * _tmFee) / _totalFees;
if(amountLiquidity > 0) {
//Guaranteed swap desired to prevent trade blockages, return values ignored
dexRouter.addLiquidityETH{value: amountLiquidity}(
address(this),
amountToLiquify,
0,
0,
lpAddress,
block.timestamp
);
}
if(amountTeam > 0)
(success, ) = teamAddress.call{value: amountTeam}("");
(success, ) = taxAddress.call{value: address(this).balance}("");
}
// 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 setTaxAddress(address _taxAddress) external onlyOwner {
require(_taxAddress != address(0), "_taxAddress address cannot be 0");
taxAddress = _taxAddress;
}
function setLPAddress(address _lpAddress) external onlyOwner {
require(_lpAddress != address(0), "_lpAddress address cannot be 0");
lpAddress = _lpAddress;
}
function setTeamAddress(address _teamAddress) external onlyOwner {
require(_teamAddress != address(0), "_teamAddress address cannot be 0");
teamAddress = _teamAddress;
}
function launch(address lpOwner) external payable onlyOwner {
require(tradingActiveTime == 0);
lpPair = IDexFactory(dexRouter.factory()).createPair(dexRouter.WETH(), address(this));
pairs[lpPair] = true;
dexRouter.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,lpOwner,block.timestamp);
}
function tradingActive() external onlyOwner {
require(tradingActiveTime == 0);
tradingActiveTime = block.timestamp;
}
function setTargetLiquidity(uint256 _target, uint256 _denominator) external onlyOwner {
targetLiquidity = _target;
targetLiquidityDenominator = _denominator;
emit TargetLiquiditySet(_target * 100 / _denominator);
}
function getCirculatingSupply() public view returns (uint256) {
return totalSupply() - (balanceOf(address(0xdead)) + balanceOf(address(0)));
}
function getLiquidityBacking(uint256 accuracy) public view returns (uint256) {
return (accuracy * balanceOf(lpPair)) / getCirculatingSupply();
}
function isOverLiquified(uint256 target, uint256 accuracy) public view returns (bool) {
return getLiquidityBacking(accuracy) > target;
}
function setMaxWallet(uint256 percent) external onlyOwner() {
require(percent > 0);
maxWalletSize = (getCirculatingSupply() * percent) / 100;
}
function updateSwapTokensAtAmount(uint256 newAmount) external onlyOwner {
require(newAmount >= getCirculatingSupply() / 100000, "Swap amount cannot be lower than 0.001% total supply.");
require(newAmount <= getCirculatingSupply() / 1000, "Swap amount cannot be higher than 0.1% total supply.");
swapTokensAtAmount = newAmount;
}
} |