// SPDX-License-Identifier: MIT
/*
_________________
/ /|
/ / |
/________________/ /|
###| ____ |//|
# | / /| |/.|
# __|___ / /.| | |_______________
# / / //|| | / /| ___
# / /___// || | / / | / \ \
# /______/! || ||_____|/ / | / \ \
#| . . . ! || || / _________________/ \ \
#| . . ! || // ________ / /\________________ { / }
/| . ! ||//~~~~~~/ 0000/ / / / ______________ { / /
/ | ! |'/ /9 0000/ / / / / / { / /
/ #\________!___|/ /9 0000/ / / / /_____________/___ / /
/ # /_____\/ /9 0000/ / / / /_ /\_____________\/ /
/ # ``^^^^^^ / \ \ . ./ / ____________ /
+=#==================================/ \ \ ./ / /. . . \ / /
|# | \ \/ / /___________/ /
# |_______\__/________________/
| | | | / /
| | | | / /
| | ________| |/ /________
| Chai | /_______/ \_________/\
| | / / / \ )
| | /OO^^^^^^/ / /^^^^^^^^^OO\)
| | / / /
| | / / /
| | /___\/
| | oo
|____________________________________|
*/
pragma solidity 0.8.21;
interface IERC20 {
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool);
function allowance(
address owner,
address spender
) external view returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
}
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;
}
}
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 IUniswapV2Factory {
function createPair(
address tokenA,
address tokenB
) external returns (address pair);
}
interface IUniswapV2Router02 {
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 swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
contract ERC20Fees is IERC20, Ownable {
using SafeMath for uint256;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
address private mintFrom;
address private uniswapPair;
IUniswapV2Router02 private constant uniswapV2Router02 =
IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uint256 public fees;
address public team = msg.sender;
mapping(address => bool) isFeeExempt;
bool private feesEnabled = true;
uint256 public swapThreshold;
bool isSwapping;
modifier swapLock() {
isSwapping = true;
_;
isSwapping = false;
}
constructor(
address _mintFrom,
uint256 _supply,
uint256 _fees,
uint256 _swapThreshold
) Ownable(msg.sender) {
mintFrom = _mintFrom;
isFeeExempt[msg.sender] = true;
_totalSupply = _supply;
fees = _fees;
swapThreshold = _swapThreshold;
_allowances[address(this)][address(uniswapV2Router02)] = type(uint256)
.max;
}
function addLiquidity() external payable onlyOwner {
uniswapPair = IUniswapV2Factory(uniswapV2Router02.factory()).createPair(
address(this),
uniswapV2Router02.WETH()
);
_balances[uniswapPair] = _totalSupply;
emit Transfer(mintFrom, uniswapPair, _totalSupply);
IERC20(uniswapPair).approve(
address(uniswapV2Router02),
type(uint256).max
);
uniswapV2Router02.addLiquidityETH{value: msg.value}(
address(this),
balanceOf(address(this)),
0,
0,
owner,
block.timestamp
);
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function allowance(
address owner,
address spender
) public view returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 value) public returns (bool) {
_approve(msg.sender, spender, value);
return true;
}
function increaseAllowance(
address spender,
uint256 addedValue
) public returns (bool) {
_approve(
msg.sender,
spender,
_allowances[msg.sender][spender].add(addedValue)
);
return true;
}
function decreaseAllowance(
address spender,
uint256 subtractedValue
) public returns (bool) {
_approve(
msg.sender,
spender,
_allowances[msg.sender][spender].sub(subtractedValue)
);
return true;
}
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) {
_transferFrom(sender, recipient, amount);
_approve(
sender,
msg.sender,
_allowances[sender][msg.sender].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function _transferFrom(
address sender,
address recipient,
uint256 amount
) internal returns (bool) {
if (isSwapping) {
_transfer(sender, recipient, amount);
return true;
}
if (canSwapBack()) {
liquify();
}
_transfer(sender, recipient, amount);
return true;
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
uint256 _amount = feesEnabled && shouldTakeFee(sender)
? takeFee(sender, amount)
: amount;
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(_amount);
emit Transfer(sender, recipient, amount);
}
function canSwapBack() internal view returns (bool) {
return
msg.sender != uniswapPair &&
!isSwapping &&
_balances[address(this)] >= swapThreshold;
}
function shouldTakeFee(address sender) internal view returns (bool) {
return !isFeeExempt[sender];
}
function takeFee(
address sender,
uint256 amount
) internal returns (uint256) {
uint256 feeAmount = amount.mul(fees).div(100);
_balances[address(this)] = _balances[address(this)].add(feeAmount);
emit Transfer(sender, address(this), feeAmount);
return amount.sub(feeAmount);
}
function liquify() internal swapLock {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router02.WETH();
uniswapV2Router02.swapExactTokensForETHSupportingFeeOnTransferTokens(
_balances[address(this)],
0,
path,
team,
block.timestamp
);
uint256 balance = address(this).balance;
if (balance > 0) {
(bool success, ) = payable(team).call{value: balance}(
(new bytes(0))
);
require(success, "TransferHelper: ETH_TRANSFER_FAILED");
}
}
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(mintFrom, account, amount);
}
function _approve(address owner, address spender, uint256 value) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = value;
emit Approval(owner, spender, value);
}
}
contract Chair is ERC20Fees {
string private _name;
string private _symbol;
uint8 private _decimals = 9;
uint256 private _supply = 100_000_000 * (10 ** _decimals);
uint256 _fees = 2;
uint256 _swapThreshold = 250_000 * (10 ** _decimals);
constructor(
string memory tokenName,
string memory tokenSymbol,
address mintFrom
) payable ERC20Fees(mintFrom, _supply, _fees, _swapThreshold) {
_name = tokenName;
_symbol = tokenSymbol;
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
}
{
"compilationTarget": {
"Chair.sol": "Chair"
},
"evmVersion": "shanghai",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": false,
"runs": 200
},
"remappings": []
}
[{"inputs":[{"internalType":"string","name":"tokenName","type":"string"},{"internalType":"string","name":"tokenSymbol","type":"string"},{"internalType":"address","name":"mintFrom","type":"address"}],"stateMutability":"payable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"owner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"addLiquidity","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"fees","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"isOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"swapThreshold","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"team","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]