// 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 0.8.7; abstract contract Context { function _msgSender() internal view returns (address payable) { return payable(msg.sender); } function _msgData() internal view returns (bytes memory) { 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 token decimals. */ function decimals() external view returns (uint8); /** * @dev Returns the token symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the token name. */ function name() external view returns (string memory); /** * @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 ); } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require( address(this).balance >= amount, "Address: insufficient balance" ); (bool success, ) = recipient.call{value: amount}(""); require( success, "Address: unable to send value, recipient may have reverted" ); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue( target, data, value, "Address: low-level call with value failed" ); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require( address(this).balance >= value, "Address: insufficient balance for call" ); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}( data ); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall( target, data, "Address: low-level static call failed" ); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall( target, data, "Address: low-level delegate call failed" ); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } interface IUniswapV2Factory { event PairCreated( address indexed token0, address indexed token1, address lpPair, uint256 ); function getPair(address tokenA, address tokenB) external view returns (address lpPair); function createPair(address tokenA, address tokenB) external returns (address lpPair); } interface IUniswapV2Pair { function factory() external view returns (address); function getReserves() external view returns ( uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast ); function token0() external view returns (address); function token1() external view returns (address); } interface IUniswapV2Router01 { 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 ); function addLiquidity( address tokenA, address tokenB, uint256 amountADesired, uint256 amountBDesired, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline ) external returns ( uint256 amountA, uint256 amountB, uint256 liquidity ); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function getAmountsOut(uint256 amountIn, address[] calldata path) external view returns (uint256[] memory amounts); function getAmountsIn(uint256 amountOut, address[] calldata path) external view returns (uint256[] memory amounts); } interface IUniswapV2Router02 is IUniswapV2Router01 { 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 swapExactTokensForTokensSupportingFeeOnTransferTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external; function swapExactTokensForTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external returns (uint256[] memory amounts); } ////////CONTRACT//IMPLEMENTATION///////// contract WIZ is Context, IERC20 { mapping(address => uint256) private _rOwned; mapping(address => uint256) private _tOwned; mapping(address => mapping(address => uint256)) private _allowances; string private constant _name = "WIZ"; string private constant _symbol = "WIZ"; uint8 private constant _decimals = 4; uint256 private constant _totalSupply = 100_000_000_000 * (10**_decimals); uint256 private constant _tTotal = _totalSupply; uint256 private constant MAX = ~uint256(0); uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint private _feesAndLimitsStartTimestamp; bool private _inLiquidityOperation; uint16 public constant buyFeeReflect = 0; uint16 public constant buyFeeBurn = 0; uint16 public constant buyFeeMarketing = 100; uint16 public constant buyFeeTotalSwap = 300; uint16 public constant sellFeeReflect = 250; uint16 public constant sellFeeBurn = 50; uint16 public constant sellFeeMarketing = 0; uint16 public constant sellFeeTotalSwap = 500; uint16 public constant ratioLiquidity = 200; uint16 public constant ratioTreasury = 600; uint16 public constant ratioTotal = 800; uint256 public constant feeDivisor = 10000; address public constant dexRouterAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D; IUniswapV2Router02 public dexRouter; address public lpPair; address public constant DEAD = 0x000000000000000000000000000000000000dEaD; address public constant marketingWallet = 0x38649185909fD39fF2eCDB27Ac472a5ecb003a0c; address public constant treasuryWallet = 0x1e18ed1bfCa02e59a43de32c60Ac0FD4923b64b5; bool private _inSwap; uint256 public constant contractSwapTimer = 10 seconds; uint256 private _lastSwapTimestamp; uint256 public constant swapThreshold = (_tTotal * 5) / 10000; uint256 public constant swapAmount = (_tTotal * 10) / 10000; uint256 private constant _maxTxAmount = (_tTotal * 300) / 10000; event AutoLiquify(uint256 amountCurrency, uint256 amountTokens); modifier lockTheSwap() { _inSwap = true; _; _inSwap = false; } modifier withoutTransferFees() { _inLiquidityOperation = true; _; _inLiquidityOperation = false; } constructor() payable { _rOwned[msg.sender] = _rTotal; // start applying fee and limits from this time _feesAndLimitsStartTimestamp = block.timestamp + 15 minutes; if ( block.chainid == 1 || block.chainid == 5 || block.chainid == 31337 ) { dexRouter = IUniswapV2Router02(dexRouterAddress); } else { revert("Deployment chain is not supported by this contract"); } lpPair = IUniswapV2Factory(dexRouter.factory()).createPair( dexRouter.WETH(), address(this) ); // FIXME: think about potential overflow after years _approve(msg.sender, dexRouterAddress, type(uint256).max); _approve(address(this), dexRouterAddress, type(uint256).max); IERC20(lpPair).approve(dexRouterAddress, type(uint256).max); emit Transfer(address(0), _msgSender(), _tTotal); } receive() external payable {} function allowFeesAndLimits() external { _feesAndLimitsStartTimestamp = block.timestamp; } function totalSupply() external pure override returns (uint256) { if (_tTotal == 0) { revert(); } return _tTotal; } function decimals() external pure override returns (uint8) { return _decimals; } function symbol() external pure override returns (string memory) { return _symbol; } function name() external pure override returns (string memory) { return _name; } function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; } function balanceOf(address account) public view override returns (uint256) { address lpPair_ = lpPair; if (_isExcludedFromReflections(account, lpPair_)) return _tOwned[account]; return _tokenFromReflection(_rOwned[account], lpPair_); } function transfer(address recipient, uint256 amount) external override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function approve(address spender, uint256 amount) external override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function _approve( address sender, address spender, uint256 amount ) private { require(sender != address(0), "ERC20: Sender is not zero Address"); require(spender != address(0), "ERC20: Spender is not zero Address"); _allowances[sender][spender] = amount; emit Approval(sender, spender, amount); } function transferFrom( address sender, address recipient, uint256 amount ) external override returns (bool) { if (_allowances[sender][msg.sender] != type(uint256).max) { _allowances[sender][msg.sender] -= amount; } _transfer(sender, recipient, amount); return true; } function getCirculatingSupply() public view returns (uint256) { return (_tTotal - (balanceOf(DEAD) + balanceOf(address(0)))); } function _isExcludedFromReflections(address account, address lpPair_) private view returns (bool) { return account == address(this) || account == DEAD || account == marketingWallet || account == lpPair_; } function isExcludedFromReflections(address account) public view returns (bool) { return _isExcludedFromReflections(account, lpPair); } // function getExcludedFromReflections(uint256 index) public view returns (address); // } function addLiquidityETH( uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) public payable withoutTransferFees returns ( uint amountToken, uint amountETH, uint liquidity ) { // we need to transfer WIZ to our contract for router to have access to it _transfer(msg.sender, address(this), amountTokenDesired); if (deadline == 0) deadline = block.timestamp; if (to == address(0)) to = msg.sender; (amountToken, amountETH, liquidity) = dexRouter.addLiquidityETH{ value: msg.value }( address(this), amountTokenDesired, amountTokenMin, amountETHMin, to, deadline ); // refund dust eth, if any if (amountToken < amountTokenDesired) { _transfer( address(this), msg.sender, amountTokenDesired - amountToken ); } // refund dust WIZ, if any if (amountETH < msg.value) { payable(msg.sender).transfer(msg.value - amountETH); } } function removeLiquidityETH( uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) public withoutTransferFees returns (uint amountToken, uint amountETH) { // we need to transfer LP Pair tokens to our contract for router to have access to it IERC20(lpPair).transferFrom(msg.sender, address(this), liquidity); if (liquidity == 0) liquidity = IERC20(lpPair).balanceOf(msg.sender); if (deadline == 0) deadline = block.timestamp; if (to == address(0)) to = msg.sender; uint balanceBefore = balanceOf(to); amountETH = dexRouter.removeLiquidityETHSupportingFeeOnTransferTokens( address(this), liquidity, amountTokenMin, amountETHMin, to, deadline ); amountToken = balanceOf(to) - balanceBefore; } function _tokenFromReflection(uint256 rAmount, address lpPair_) private view returns (uint256) { require( rAmount <= _rTotal, "Amount must be less than total reflections" ); uint256 currentRate = _getRate(lpPair_); return rAmount / currentRate; } function isExcludedFromFees(address account) public view returns (bool) { return _isExcludedFromFees(account); } function _isExcludedFromFees(address account) private view returns (bool) { return account == address(this) || account == DEAD; } function getMaxTX() public pure returns (uint256) { return _maxTxAmount / (10**_decimals); } function _transfer( address from, address to, uint256 amount ) internal { 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"); bool feesAndLimitsAllowed = block.timestamp >= _feesAndLimitsStartTimestamp; if (feesAndLimitsAllowed) { require( amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount." ); } address lpPair_ = lpPair; bool takeFee = feesAndLimitsAllowed && !(_isExcludedFromFees(from) || _isExcludedFromFees(to)) && !_inLiquidityOperation; if (to == lpPair_) { if (!_inSwap && !_inLiquidityOperation) { if (_lastSwapTimestamp + contractSwapTimer < block.timestamp) { uint256 contractTokenBalance = balanceOf(address(this)); if (contractTokenBalance >= swapThreshold) { if (contractTokenBalance >= swapAmount) { contractTokenBalance = swapAmount; } _contractSwap(contractTokenBalance); _lastSwapTimestamp = block.timestamp; } } } } _finalizeTransfer(from, to, amount, takeFee); } function _contractSwap(uint256 contractTokenBalance) private lockTheSwap { if ( contractTokenBalance > _allowances[address(this)][dexRouterAddress] ) { _allowances[address(this)][dexRouterAddress] = type(uint256).max; } uint256 toLiquify = ((contractTokenBalance * ratioLiquidity) / ratioTotal) / 2; uint256 swapAmt = contractTokenBalance - toLiquify; address[] memory path = new address[](2); path[0] = address(this); path[1] = dexRouter.WETH(); dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens( swapAmt, 0, path, address(this), block.timestamp ); uint256 amtBalance = address(this).balance; uint256 liquidityBalance = (amtBalance * toLiquify) / swapAmt; if (toLiquify > 0) { dexRouter.addLiquidityETH{value: liquidityBalance}( address(this), toLiquify, 0, 0, DEAD, block.timestamp ); emit AutoLiquify(liquidityBalance, toLiquify); } amtBalance -= liquidityBalance; uint256 treasuryBalance = amtBalance; if (ratioTreasury > 0) { payable(treasuryWallet).transfer(treasuryBalance); } } struct ExtraValues { uint256 tTransferAmount; uint256 tFee; uint256 tSwap; uint256 tBurn; uint256 tMarketing; uint256 rTransferAmount; uint256 rAmount; uint256 rFee; uint256 currentRate; } function _finalizeTransfer( address from, address to, uint256 tAmount, bool takeFee ) private { address lpPair_ = lpPair; ExtraValues memory values = _getValues( from, to, tAmount, takeFee, lpPair_ ); _rOwned[from] -= values.rAmount; _rOwned[to] += values.rTransferAmount; if (_isExcludedFromReflections(from, lpPair_)) { _tOwned[from] -= tAmount; } if (_isExcludedFromReflections(to, lpPair_)) { _tOwned[to] += values.tTransferAmount; } if (values.rFee > 0) { _rTotal -= values.rFee; } emit Transfer(from, to, values.tTransferAmount); } function _getValues( address from, address to, uint256 tAmount, bool takeFee, address lpPair_ ) private returns (ExtraValues memory) { ExtraValues memory values; values.currentRate = _getRate(lpPair_); values.rAmount = tAmount * values.currentRate; // _rTotal / _tTotal if (takeFee) { uint256 currentReflect; uint256 currentSwap; uint256 currentBurn; uint256 currentMarketing; uint256 divisor = feeDivisor; if (Address.isContract(to)) { currentReflect = sellFeeReflect; currentBurn = sellFeeBurn; currentMarketing = sellFeeMarketing; currentSwap = sellFeeTotalSwap; } else if (Address.isContract(from)) { currentReflect = buyFeeReflect; currentBurn = buyFeeBurn; currentMarketing = buyFeeMarketing; currentSwap = buyFeeTotalSwap; } values.tFee = (tAmount * currentReflect) / divisor; values.tSwap = (tAmount * currentSwap) / divisor; values.tBurn = (tAmount * currentBurn) / divisor; values.tMarketing = (tAmount * currentMarketing) / divisor; values.tTransferAmount = tAmount - (values.tFee + values.tSwap + values.tBurn + values.tMarketing); values.rFee = values.tFee * values.currentRate; } else { values.tFee = 0; values.tSwap = 0; values.tBurn = 0; values.tMarketing = 0; values.tTransferAmount = tAmount; values.rFee = 0; } if (values.tSwap > 0) { _rOwned[address(this)] += values.tSwap * values.currentRate; _tOwned[address(this)] += values.tSwap; emit Transfer(from, address(this), values.tSwap); } if (values.tBurn > 0) { _rOwned[DEAD] += values.tBurn * values.currentRate; _tOwned[DEAD] += values.tBurn; emit Transfer(from, DEAD, values.tBurn); } if (values.tMarketing > 0) { _rOwned[marketingWallet] += values.tMarketing * values.currentRate; _tOwned[marketingWallet] += values.tMarketing; emit Transfer(from, marketingWallet, values.tMarketing); } values.rTransferAmount = values.rAmount - (values.rFee + (values.tSwap * values.currentRate) + (values.tBurn * values.currentRate) + (values.tMarketing * values.currentRate)); return values; } function _getRate(address lpPair_) private view returns (uint256) { uint256 rTotal = _rTotal; uint256 tTotal = _tTotal; uint256 rSupply; uint256 tSupply; uint256 rOwned; uint256 tOwned; unchecked { rSupply = rTotal; tSupply = tTotal; rOwned = _rOwned[address(this)]; tOwned = _tOwned[address(this)]; if (rOwned > rSupply || tOwned > tSupply) return rTotal / tTotal; rSupply -= rOwned; tSupply -= tOwned; rOwned = _rOwned[DEAD]; tOwned = _tOwned[DEAD]; if (rOwned > rSupply || tOwned > tSupply) return rTotal / tTotal; rSupply -= rOwned; tSupply -= tOwned; rOwned = _rOwned[marketingWallet]; tOwned = _tOwned[marketingWallet]; if (rOwned > rSupply || tOwned > tSupply) return rTotal / tTotal; rSupply -= rOwned; tSupply -= tOwned; rOwned = _rOwned[lpPair_]; tOwned = _tOwned[lpPair_]; if (rOwned > rSupply || tOwned > tSupply) return rTotal / tTotal; rSupply -= rOwned; tSupply -= tOwned; } return rSupply / tSupply; } }