Contract Source Code:
File 1 of 1 : BOKCHOY
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
/*
Socials: https://t.me/ChoyCommunity
Twitter: https://twitter.com/BokChoyToken
Web: https://bok-choy.club/
*/
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns(address pair);
}
interface IERC20 {
function totalSupply() external view returns(uint256);
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);
}
interface IERC20Metadata is IERC20 {
function name() external view returns(string memory);
function symbol() external view returns(string memory);
function decimals() external view returns(uint8);
}
abstract contract Context {
function _msgSender() internal view virtual returns(address) {
return msg.sender;
}
}
contract ERC20 is Context, IERC20, IERC20Metadata {
using SafeMath for uint256;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
function name() public view virtual override returns(string memory) {
return _name;
}
function symbol() public view virtual override returns(string memory) {
return _symbol;
}
function decimals() public view virtual override returns(uint8) {
return 18;
}
function totalSupply() public view virtual override returns(uint256) {
return _totalSupply;
}
function balanceOf(address account) public view virtual override returns(uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns(bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view virtual override returns(uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public virtual override returns(bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns(bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased cannot be below zero"));
return true;
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
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;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns(address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
library SafeMathInt {
int256 private constant MIN_INT256 = int256(1) << 255;
int256 private constant MAX_INT256 = ~(int256(1) << 255);
function mul(int256 a, int256 b) internal pure returns(int256) {
int256 c = a * b;
require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));
require((b == 0) || (c / b == a));
return c;
}
function div(int256 a, int256 b) internal pure returns(int256) {
require(b != -1 || a != MIN_INT256);
return a / b;
}
function sub(int256 a, int256 b) internal pure returns(int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a));
return c;
}
function add(int256 a, int256 b) internal pure returns(int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a));
return c;
}
function abs(int256 a) internal pure returns(int256) {
require(a != MIN_INT256);
return a < 0 ? -a : a;
}
function toUint256Safe(int256 a) internal pure returns(uint256) {
require(a >= 0);
return uint256(a);
}
}
library SafeMathUint {
function toInt256Safe(uint256 a) internal pure returns(int256) {
int256 b = int256(a);
require(b >= 0);
return b;
}
}
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 BOKCHOY is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable router;
address public immutable uniswapV2Pair;
// addresses
address private developmentWallet;
address private marketingWallet;
// limits
uint256 private maxBuyAmount;
uint256 private maxSellAmount;
uint256 private maxWalletAmount;
uint256 private thresholdSwapAmount;
// status flags
bool private isTrading = false;
bool public swapEnabled = false;
bool public isSwapping;
struct Fees {
uint256 buyTotalFees;
uint256 buyMarketingFee;
uint256 buyDevelopmentFee;
uint256 buyLiquidityFee;
uint256 sellTotalFees;
uint256 sellMarketingFee;
uint256 sellDevelopmentFee;
uint256 sellLiquidityFee;
}
Fees public _fees = Fees({
buyTotalFees: 0,
buyMarketingFee: 0,
buyDevelopmentFee:0,
buyLiquidityFee: 0,
sellTotalFees: 0,
sellMarketingFee: 0,
sellDevelopmentFee:0,
sellLiquidityFee: 0
});
uint256 public tokensForMarketing;
uint256 public tokensForLiquidity;
uint256 public tokensForDevelopment;
uint256 private taxTill;
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) public _isExcludedMaxTransactionAmount;
mapping(address => bool) public _isExcludedMaxWalletAmount;
mapping(address => bool) public marketPair;
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived
);
constructor() ERC20("BOK CHOY", "CHOY") {
router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Pair = IUniswapV2Factory(router.factory()).createPair(address(this), router.WETH());
_isExcludedMaxTransactionAmount[address(router)] = true;
_isExcludedMaxTransactionAmount[address(uniswapV2Pair)] = true;
_isExcludedMaxTransactionAmount[owner()] = true;
_isExcludedMaxTransactionAmount[address(this)] = true;
_isExcludedMaxTransactionAmount[address(0xdead)] = true;
_isExcludedFromFees[owner()] = true;
_isExcludedFromFees[address(this)] = true;
_isExcludedMaxWalletAmount[owner()] = true;
_isExcludedMaxWalletAmount[address(0xdead)] = true;
_isExcludedMaxWalletAmount[address(this)] = true;
_isExcludedMaxWalletAmount[address(uniswapV2Pair)] = true;
marketPair[address(uniswapV2Pair)] = true;
approve(address(router), type(uint256).max);
uint256 totalSupply = 5e9 * 1e18;
maxBuyAmount = totalSupply * 1 / 100; // 1% maxBuyAmount
maxSellAmount = totalSupply * 1 / 100; // 1% maxSellAmount
maxWalletAmount = totalSupply * 1 / 100; // 1% maxWallet
thresholdSwapAmount = totalSupply * 1 / 1000;
_fees.buyMarketingFee = 20;
_fees.buyLiquidityFee = 0;
_fees.buyDevelopmentFee = 0;
_fees.buyTotalFees = _fees.buyMarketingFee + _fees.buyLiquidityFee + _fees.buyDevelopmentFee;
_fees.sellMarketingFee = 30;
_fees.sellLiquidityFee = 0;
_fees.sellDevelopmentFee = 0;
_fees.sellTotalFees = _fees.sellMarketingFee + _fees.sellLiquidityFee + _fees.sellDevelopmentFee;
marketingWallet = address(0x332CEB38A8514eEc47f95fB91854C297Cb106158);
developmentWallet = address(0x332CEB38A8514eEc47f95fB91854C297Cb106158);
/*
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
*/
_mint(msg.sender, totalSupply);
}
receive() external payable {
}
// once enabled, can never be turned off
function enableTrading() external onlyOwner {
isTrading = true;
swapEnabled = true;
taxTill = block.number + 0;
}
// change the minimum amount of tokens to sell from fees
function updateThresholdSwapAmount(uint256 newAmount) external onlyOwner returns(bool){
thresholdSwapAmount = newAmount;
return true;
}
function updateMaxTxnAmount(uint256 newMaxBuy, uint256 newMaxSell) public onlyOwner {
maxBuyAmount = (totalSupply() * newMaxBuy) / 1000;
maxSellAmount = (totalSupply() * newMaxSell) / 1000;
}
function updateMaxWalletAmount(uint256 newPercentage) public onlyOwner {
maxWalletAmount = (totalSupply() * newPercentage) / 1000;
}
// only use to disable contract sales if absolutely necessary (emergency use only)
function toggleSwapEnabled(bool enabled) external onlyOwner(){
swapEnabled = enabled;
}
function updateFees(uint256 _marketingFeeBuy, uint256 _liquidityFeeBuy,uint256 _developmentFeeBuy,uint256 _marketingFeeSell, uint256 _liquidityFeeSell,uint256 _developmentFeeSell) external onlyOwner{
_fees.buyMarketingFee = _marketingFeeBuy;
_fees.buyLiquidityFee = _liquidityFeeBuy;
_fees.buyDevelopmentFee = _developmentFeeBuy;
_fees.buyTotalFees = _fees.buyMarketingFee + _fees.buyLiquidityFee + _fees.buyDevelopmentFee;
_fees.sellMarketingFee = _marketingFeeSell;
_fees.sellLiquidityFee = _liquidityFeeSell;
_fees.sellDevelopmentFee = _developmentFeeSell;
_fees.sellTotalFees = _fees.sellMarketingFee + _fees.sellLiquidityFee + _fees.sellDevelopmentFee;
require(_fees.buyTotalFees <= 70, "Must keep fees at 70% or less");
require(_fees.sellTotalFees <= 70, "Must keep fees at 70% or less");
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
}
function excludeFromWalletLimit(address account, bool excluded) public onlyOwner {
_isExcludedMaxWalletAmount[account] = excluded;
}
function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
function removeLimits() external onlyOwner {
updateMaxTxnAmount(1000,1000);
updateMaxWalletAmount(1000);
}
function setMarketPair(address pair, bool value) public onlyOwner {
require(pair != uniswapV2Pair, "The pair cannot be removed from marketPair");
marketPair[pair] = value;
}
function setWallets(address _marketingWallet,address _developmentWallet) external onlyOwner{
marketingWallet = _marketingWallet;
developmentWallet = _developmentWallet;
}
function isExcludedFromFees(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
if (amount == 0) {
super._transfer(sender, recipient, 0);
return;
}
if (
sender != owner() &&
recipient != owner() &&
!isSwapping
) {
if (!isTrading) {
require(_isExcludedFromFees[sender] || _isExcludedFromFees[recipient], "Trading is not active.");
}
if (marketPair[sender] && !_isExcludedMaxTransactionAmount[recipient]) {
require(amount <= maxBuyAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
}
else if (marketPair[recipient] && !_isExcludedMaxTransactionAmount[sender]) {
require(amount <= maxSellAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
if (!_isExcludedMaxWalletAmount[recipient]) {
require(amount + balanceOf(recipient) <= maxWalletAmount, "Max wallet exceeded");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= thresholdSwapAmount;
if (
canSwap &&
swapEnabled &&
!isSwapping &&
marketPair[recipient] &&
!_isExcludedFromFees[sender] &&
!_isExcludedFromFees[recipient]
) {
isSwapping = true;
swapBack();
isSwapping = false;
}
bool takeFee = !isSwapping;
// if any account belongs to _isExcludedFromFee account then remove the fee
if (_isExcludedFromFees[sender] || _isExcludedFromFees[recipient]) {
takeFee = false;
}
// only take fees on buys/sells, do not take on wallet transfers
if (takeFee) {
uint256 fees = 0;
if(block.number < taxTill) {
fees = amount.mul(99).div(100);
tokensForMarketing += (fees * 94) / 99;
tokensForDevelopment += (fees * 5) / 99;
} else if (marketPair[recipient] && _fees.sellTotalFees > 0) {
fees = amount.mul(_fees.sellTotalFees).div(100);
tokensForLiquidity += fees * _fees.sellLiquidityFee / _fees.sellTotalFees;
tokensForMarketing += fees * _fees.sellMarketingFee / _fees.sellTotalFees;
tokensForDevelopment += fees * _fees.sellDevelopmentFee / _fees.sellTotalFees;
}
// on buy
else if (marketPair[sender] && _fees.buyTotalFees > 0) {
fees = amount.mul(_fees.buyTotalFees).div(100);
tokensForLiquidity += fees * _fees.buyLiquidityFee / _fees.buyTotalFees;
tokensForMarketing += fees * _fees.buyMarketingFee / _fees.buyTotalFees;
tokensForDevelopment += fees * _fees.buyDevelopmentFee / _fees.buyTotalFees;
}
if (fees > 0) {
super._transfer(sender, address(this), fees);
}
amount -= fees;
}
super._transfer(sender, recipient, amount);
}
function swapTokensForEth(uint256 tAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = router.WETH();
_approve(address(this), address(router), tAmount);
// make the swap
router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(router), tAmount);
// add the liquidity
router.addLiquidityETH{ value: ethAmount } (address(this), tAmount, 0, 0 , address(this), block.timestamp);
}
function swapBack() private {
uint256 contractTokenBalance = balanceOf(address(this));
uint256 toSwap = tokensForLiquidity + tokensForMarketing + tokensForDevelopment;
bool success;
if (contractTokenBalance == 0 || toSwap == 0) { return; }
if (contractTokenBalance > thresholdSwapAmount * 20) {
contractTokenBalance = thresholdSwapAmount * 20;
}
// Halve the amount of liquidity tokens
uint256 liquidityTokens = contractTokenBalance * tokensForLiquidity / toSwap / 2;
uint256 amountToSwapForETH = contractTokenBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 newBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = newBalance.mul(tokensForMarketing).div(toSwap);
uint256 ethForDevelopment = newBalance.mul(tokensForDevelopment).div(toSwap);
uint256 ethForLiquidity = newBalance - (ethForMarketing + ethForDevelopment);
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForDevelopment = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity);
}
(success,) = address(developmentWallet).call{ value: (address(this).balance - ethForMarketing) } ("");
(success,) = address(marketingWallet).call{ value: address(this).balance } ("");
}
}