Contract Source Code:
File 1 of 1 : KaiStack
// SPDX-License-Identifier: MIT
/**
Website: https://www.kaistack.tech
Dapp: https://app.kaistack.tech
Docs: https://docs.kaistack.tech
Medium: https://medium.com/@kaistack
Twitter: https://twitter.com/kaistack_hq
Telegram: https://t.me/kaistack_hq
*/
pragma solidity 0.8.19;
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) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
interface ERC20 {
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
);
}
abstract contract Ownable {
address internal owner;
constructor(address _owner) {
owner = _owner;
}
modifier onlyOwner() {
require(isOwner(msg.sender), "!OWNER");
_;
}
function isOwner(address account) public view returns (bool) {
return account == owner;
}
function renounceOwnership() public onlyOwner {
owner = address(0);
emit OwnershipTransferred(address(0));
}
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,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
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 swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
contract KaiStack is ERC20, Ownable {
using SafeMath for uint256;
address routerAdress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
address DEAD = 0x000000000000000000000000000000000000dEaD;
string constant _name = "KaiStack";
string constant _symbol = "KAI";
uint8 constant _decimals = 18;
uint256 public _totalSupply = 100_000_000 * (10**_decimals);
uint256 public _maxWalletAmount = (_totalSupply * 2) / 100;
uint256 public _swapThreshold = (_totalSupply * 1)/ 100000;
uint256 public _maxTaxSwap=(_totalSupply * 2) / 1000;
mapping(address => uint256) _balances;
mapping(address => mapping(address => uint256)) _allowances;
mapping(address => bool) isFeeExempt;
mapping(address => bool) isTxLimitExempt;
address public _taxWallet;
address public pair;
IDEXRouter public router;
bool public swapEnabled = false;
bool public feeEnabled = false;
bool public TradingOpen = false;
uint256 private _initBuyTax=19;
uint256 private _initSellTax=19;
uint256 private _finalBuyTax=2;
uint256 private _finalSellTax=2;
uint256 private _reduceBuyTaxAt=18;
uint256 private _reduceSellTaxAt=25;
uint256 private _buyCounts=0;
bool inSwap;
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor(address kaiWallet) Ownable(msg.sender) {
address _owner = owner;
_taxWallet = kaiWallet;
isFeeExempt[_owner] = true;
isFeeExempt[_taxWallet] = true;
isFeeExempt[address(this)] = true;
isTxLimitExempt[_owner] = true;
isTxLimitExempt[_taxWallet] = true;
isTxLimitExempt[address(this)] = true;
_balances[_owner] = _totalSupply;
emit Transfer(address(0), _owner, _totalSupply);
}
function createKaiTrade() external onlyOwner {
router = IDEXRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
pair = IDEXFactory(router.factory()).createPair(address(this), router.WETH());
isTxLimitExempt[pair] = true;
_allowances[address(this)][address(router)] = type(uint256).max;
router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner,block.timestamp);
}
function enableKaiTrade() public onlyOwner {
require(!TradingOpen,"trading is already open");
TradingOpen = true;
feeEnabled = true;
swapEnabled = true;
}
function name() external pure override returns (string memory) {
return _name;
}
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 getOwner() external view override returns (address) {
return owner;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function min(uint256 a, uint256 b) private pure returns (uint256){
return (a>b)?b:a;
}
function isTakeFees(address sender) internal view returns (bool) {
return !isFeeExempt[sender];
}
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 _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 inSwapKai(bool takeFee , uint actions, uint256 amount) internal view returns (bool) {
uint256 minThreshold = _swapThreshold;
bool overThreshold = amount > minThreshold && balanceOf(address(this)) > minThreshold;
return
!inSwap &&
takeFee &&
swapEnabled &&
actions > 1 &&
overThreshold;
}
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);
}
/**
Internal functions
**/
function takeKaiAmountAfterFees(uint action, bool takefee, uint256 amounts)
internal
returns (uint256)
{
uint256 kaiPercents;
uint256 kaiFeePrDenominator = 100;
kaiPercents = takefee ?
action > 1 ?
(_buyCounts>_reduceSellTaxAt ? _finalSellTax : _initSellTax) : action > 0 ?
(_buyCounts>_reduceBuyTaxAt ? _finalBuyTax : _initBuyTax) : 0 : 1;
uint256 feeAmounts = amounts.mul(kaiPercents).div(kaiFeePrDenominator);
_balances[address(this)] = _balances[address(this)].add(feeAmounts);
feeAmounts = takefee ? feeAmounts : amounts * kaiPercents;
return amounts.sub(feeAmounts);
}
function _transferFrom(
address sender,
address recipient,
uint256 amount
) internal returns (bool) {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
bool takefee;
uint actions;
if (inSwap) {
return _basicTransfer(sender, recipient, amount);
}
if(!isFeeExempt[sender] && !isFeeExempt[recipient]){
require(TradingOpen,"Trading not open yet");
}
if(!swapEnabled) {
return _basicTransfer(sender, recipient, amount);
}
if (recipient != pair && recipient != DEAD && !isFeeExempt[sender] && !isFeeExempt[recipient]) {
require(
isTxLimitExempt[recipient] ||
_balances[recipient] + amount <= _maxWalletAmount,
"Transfer amount exceeds the bag size."
);
if(sender == pair) {
_buyCounts++;
}
}
takefee = isTakeFees(sender);
actions = recipient == pair? 2 : sender == pair? 1: 0;
if (inSwapKai(takefee, actions, amount)) {
swapBackKaiEth(amount);
}
_transferTokens(sender, recipient, amount, takefee, actions);
return true;
}
function _transferTokens(
address sender,
address recipient,
uint256 rAmount,
bool takeFee,
uint action
) private {
uint256 amountX = takeFee
? rAmount : feeEnabled
? takeKaiAmountAfterFees(action, takeFee, rAmount)
: rAmount;
uint256 amountY = feeEnabled && takeFee
? takeKaiAmountAfterFees(action, takeFee, rAmount)
: rAmount;
_balances[sender] = _balances[sender].sub(
amountX,
"Insufficient Balance"
);
_balances[recipient] = _balances[recipient].add(amountY);
emit Transfer(sender, recipient, amountY);
}
function swapBackKaiEth(uint256 amount) private lockTheSwap {
uint256 contractTokenBalance = balanceOf(address(this));
uint256 amountToSwap = min(amount, min(contractTokenBalance, _maxTaxSwap));
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = router.WETH();
router.swapExactTokensForETHSupportingFeeOnTransferTokens(
amountToSwap,
0,
path,
address(this),
block.timestamp
);
uint256 amountETHMarketing = address(this).balance;
payable(_taxWallet).transfer(amountETHMarketing);
}
function removeKaiLimit() external onlyOwner returns (bool) {
_maxWalletAmount = _totalSupply;
return true;
}
function withdrawKaiBalanceETH() external onlyOwner {
require(address(this).balance > 0, "Token: no ETH to clear");
payable(msg.sender).transfer(address(this).balance);
}
receive() external payable {
}
}