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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: Unlicensed
// https://t.me/TheBiggerShort
// https://twitter.com/TBS_eth
pragma solidity 0.8.15;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
}
/**
* ERC20 standard interface.
*/
interface IERC20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function getOwner() external view returns (address);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address _owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* Allows for contract ownership along with multi-address authorization
*/
abstract contract Auth {
address internal owner;
mapping (address => bool) internal authorizations;
constructor(address _owner) {
owner = _owner;
authorizations[_owner] = true;
}
/**
* Function modifier to require caller to be contract owner
*/
modifier onlyOwner() {
require(isOwner(msg.sender), "!OWNER"); _;
}
/**
* Function modifier to require caller to be authorized
*/
modifier authorized() {
require(isAuthorized(msg.sender), "!AUTHORIZED"); _;
}
/**
* Authorize address. Owner only
*/
function authorize(address adr) public onlyOwner {
authorizations[adr] = true;
}
/**
* Remove address' authorization. Owner only
*/
function unauthorize(address adr) public onlyOwner {
authorizations[adr] = false;
}
/**
* Check if address is owner
*/
function isOwner(address account) public view returns (bool) {
return account == owner;
}
/**
* Return address' authorization status
*/
function isAuthorized(address adr) public view returns (bool) {
return authorizations[adr];
}
/**
* Transfer ownership to new address. Caller must be owner. Leaves old owner authorized
*/
function transferOwnership(address payable adr) public onlyOwner {
owner = adr;
authorizations[adr] = true;
emit OwnershipTransferred(adr);
}
event OwnershipTransferred(address owner);
}
interface IDEXFactory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IDEXRouter {
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 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 TBS is IERC20, Auth {
using SafeMath for uint256;
address private WETH;
address private DEAD = 0x000000000000000000000000000000000000dEaD;
address private ZERO = 0x0000000000000000000000000000000000000000;
string private constant _name = "The Bigger Short";
string private constant _symbol = "TBS";
uint8 private constant _decimals = 9;
uint256 private _totalSupply = 10_000_000_000 * (10 ** _decimals);
//max wallet holding of 2%
uint256 public _maxWalletLimit = ( _totalSupply * 2 ) / 100;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private isTaxExempt;
mapping (address => bool) isMaxTxExempt;
uint256 public buyFeeRate = 2;
uint256 public sellFeeRate = 2;
uint256 private feeDenominator = 100;
address payable public operationsWallet = payable(0x95bA11165EC1d07415Cf2bEF3d61E456cd0c4A6B);
IDEXRouter public router;
address public pair;
bool private tradingOpen;
bool private buyTXEnabled = true;
bool private maxWalletEnable = true;
uint256 private maxBuy = ( _totalSupply * 1 ) / 100;
uint256 public numTokensSellToAddToLiquidity = ( _totalSupply * 1 ) / 1000;
bool private inSwap;
modifier swapping() { inSwap = true; _; inSwap = false; }
constructor () Auth(msg.sender) {
router = IDEXRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
WETH = router.WETH();
pair = IDEXFactory(router.factory()).createPair(WETH, address(this));
_allowances[address(this)][address(router)] = type(uint256).max;
isMaxTxExempt[msg.sender] = true;
isTaxExempt[msg.sender] = true;
isTaxExempt[operationsWallet] = true;
_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
receive() external payable { }
function totalSupply() external view override returns (uint256) { return _totalSupply; }
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 getOwner() external view override returns (address) { return owner; }
function balanceOf(address account) public view override returns (uint256) { return _balances[account]; }
function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }
function approve(address spender, uint256 amount) public override returns (bool) {
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function approveMax(address spender) external returns (bool) {
return approve(spender, type(uint256).max);
}
function transfer(address recipient, uint256 amount) external override returns (bool) {
return _transferFrom(msg.sender, recipient, 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] = _allowances[sender][msg.sender].sub(amount, "Insufficient Allowance");
}
return _transferFrom(sender, recipient, amount);
}
function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
if(!authorizations[sender] && !authorizations[recipient]){
require(tradingOpen, "Trading not yet enabled.");
}
// max wallet code
if (maxWalletEnable && !authorizations[sender] && recipient != address(this) && recipient != address(DEAD) && recipient != pair && recipient != operationsWallet){
uint256 heldTokens = balanceOf(recipient);
require((heldTokens + amount) <= _maxWalletLimit,"Total Holding is currently limited, you can not buy that much.");
}
// Checks max transaction limit
if(buyTXEnabled) checkTxLimit(sender, amount);
if(inSwap){ return _basicTransfer(sender, recipient, amount); }
uint256 contractTokenBalance = balanceOf(address(this));
bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
bool shouldSwapBack = (overMinTokenBalance && recipient==pair && balanceOf(address(this)) > 0);
if(shouldSwapBack){ swapBack(numTokensSellToAddToLiquidity); }
_balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
uint256 amountReceived = shouldTakeFee(sender, recipient) ? takeFee(sender, recipient, amount) : amount;
_balances[recipient] = _balances[recipient].add(amountReceived);
emit Transfer(sender, recipient, amountReceived);
return true;
}
function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
_balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
return true;
}
function checkTxLimit(address sender, uint256 amount) internal view {
require(amount <= maxBuy || isMaxTxExempt[sender], "TX Limit Exceeded");
}
function shouldTakeFee(address sender, address recipient) internal view returns (bool) {
return ( !(isTaxExempt[sender] || isTaxExempt[recipient]) && (sender == pair || recipient == pair) );
}
function takeFee(address sender, address recipient, uint256 amount) internal returns (uint256) {
uint256 transferFeeRate = recipient == pair ? sellFeeRate : buyFeeRate;
uint256 feeAmount;
feeAmount = amount.mul(transferFeeRate).div(feeDenominator);
_balances[address(this)] = _balances[address(this)].add(feeAmount);
emit Transfer(sender, address(this), feeAmount);
return amount.sub(feeAmount);
}
function swapBack(uint256 amount) internal swapping {
swapTokensForEth(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] = WETH;
// make the swap
router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
operationsWallet,
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// add the liquidity
router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner,
block.timestamp
);
}
function swapToken() public onlyOwner {
uint256 contractTokenBalance = balanceOf(address(this));
bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
bool shouldSwapBack = (overMinTokenBalance && balanceOf(address(this)) > 0);
if(shouldSwapBack){
swapTokensForEth(numTokensSellToAddToLiquidity);
}
}
function openTrading() external onlyOwner {
tradingOpen = true;
}
function setIsTaxExempt(address holder, bool exempt) external onlyOwner {
isTaxExempt[holder] = exempt;
}
function setFee(uint256 _sellFeeRate, uint256 _buyFeeRate) external onlyOwner {
sellFeeRate = _sellFeeRate;
buyFeeRate = _buyFeeRate;
}
function setMaxBuy(uint256 _percent) external onlyOwner {
maxBuy = ( _totalSupply * _percent ) / 100;
}
function manualSend() external onlyOwner {
uint256 contractETHBalance = address(this).balance;
payable(operationsWallet).transfer(contractETHBalance);
}
function manualBurn(uint256 amount) external onlyOwner returns (bool) {
return _basicTransfer(address(this), DEAD, amount);
}
function getCirculatingSupply() public view returns (uint256) {
return _totalSupply.sub(balanceOf(DEAD)).sub(balanceOf(ZERO));
}
function setOperationsWallet(address _operationsWallet) external onlyOwner {
operationsWallet = payable(_operationsWallet);
}
function removeLimit() external onlyOwner {
buyTXEnabled = false;
maxWalletEnable = false;
}
function setSwapThresholdAmount (uint256 amount) external onlyOwner {
require (amount <= _totalSupply.div(100), "can't exceed 1%");
numTokensSellToAddToLiquidity = amount * 10 ** 9;
}
function setMaxWalletLimit(uint256 maxWallPercent) external onlyOwner() {
_maxWalletLimit = (_totalSupply * maxWallPercent ) / 100;
}
function setIsMaxTxExempt(address holder, bool exempt) external authorized {
isMaxTxExempt[holder] = exempt;
}
} |