Contract Name:
DecentraBNB
Contract Source Code:
File 1 of 1 : DecentraBNB
//SPDX-License-Identifier: UNLICENSED
/**
*
* DecentraBNB v1.0 | A Global Rental Revolution.
*
* Modernizing holiday rental through the power of Blockchain technology.
*
* Website - https://decentrabnb.com/
* Telegram - https://t.me/decentraBNB
* Twitter - https://twitter.com/DecentraBnB
* Email - [email protected]
*/
pragma solidity ^0.8.13;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
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);
}
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;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
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);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract DecentraBNB is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isTimelockExempt;
mapping (address => bool) private _bots;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000 * 10**6 * 10**9; // 1,000,000,000 Tokens
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private constant _name = unicode"DecentraBNB";
string private constant _symbol = unicode"DBNB";
uint8 private constant _decimals = 9;
uint256 private minContractTokensToSwap = 250000 * 10**9; // 250K
uint256 private _taxFee = 0;
uint256 private _teamFee = 10;
uint256 private _liquidityFeePercentage = 0;
uint256 private _maxWalletPercentage = 3;
uint256 private _launchBlock = 0;
uint256 private _maxBuyAmount = 50 * 10**6 * 10**9; // 5%
uint256 private _maxSellAmount = 10 * 10**6 * 10**9; // 1%
uint256 private _baseFee = 10;
uint256 private _moderateBuyImpact = 1;
uint256 private _highBuyImpact = 3;
uint256 private _extremeBuyImpact = 5;
uint256 private _moderateBuyFee = 20; // 2% fee discount
uint256 private _highBuyFee = 40; // 4% fee discount
uint256 private _extremeBuyFee = 60; // 6% fee discount
uint256 private _moderateSellImpact = 1;
uint256 private _highSellImpact = 3;
uint256 private _extremeSellImpact = 5;
uint256 private _moderateSellFee = 50; // 5% fee increase
uint256 private _highSellFee = 120; // 12% fee increase
uint256 private _extremeSellFee = 200; // 20% fee increase
uint256 private _previousTaxFee = _taxFee;
uint256 private _previousteamFee = _teamFee;
address payable private _FeeAddress;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private _tradingOpen = false;
bool private _swapAll = false;
bool private _takeFeeFromTransfer = false;
bool private _inSwap = false;
bool private _noTaxMode = false;
bool private _getFeeOnSell = true;
bool private _cooldownEnabled = false;
uint private _cooldownTimerInterval = 3600; // 1 hour cooldown
mapping (address => uint) private _cooldownTimer;
mapping(address => bool) private automatedMarketMakerPairs;
event Response(bool feeSent);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiqudity
);
modifier lockTheSwap {
_inSwap = true;
_;
_inSwap = false;
}
constructor (address payable FeeAddress) {
_FeeAddress = FeeAddress;
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[FeeAddress] = true;
_isTimelockExempt[owner()] = true;
_isTimelockExempt[address(this)] = true;
_isTimelockExempt[FeeAddress] = true;
_isTimelockExempt[0x000000000000000000000000000000000000dEaD] = true;
uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
automatedMarketMakerPairs[uniswapV2Pair] = 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 tokenFromReflection(_rOwned[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 tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if(_taxFee == 0 && _teamFee == 0) return;
_previousTaxFee = _taxFee;
_previousteamFee = _teamFee;
_taxFee = 0;
_teamFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_teamFee = _previousteamFee;
}
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");
if(from != owner() && to != owner()) {
require(!_bots[from] && !_bots[to]);
if (block.number <= _launchBlock + 4) {
if (from != uniswapV2Pair && from != address(uniswapV2Router)) {
_bots[from] = true;
} else if (to != uniswapV2Pair && to != address(uniswapV2Router)) {
_bots[to] = true;
}
}
uint256 contractTokenBalance = balanceOf(address(this));
if(from == uniswapV2Pair && to != address(uniswapV2Router) && !_isExcludedFromFee[to]) {
require(_tradingOpen, "Trading not yet enabled");
if(_cooldownEnabled && !_isTimelockExempt[to]){
require(_cooldownTimer[to] < block.timestamp, "Please wait for cooldown between buys");
_cooldownTimer[to] = block.timestamp + _cooldownTimerInterval;
}
if (amount >= balanceOf(uniswapV2Pair).mul(_extremeBuyImpact).div(100)) {
_teamFee = _baseFee - _baseFee.mul(_extremeBuyFee).div(100);
} else if (amount >= balanceOf(uniswapV2Pair).mul(_highBuyImpact).div(100)) {
_teamFee = _baseFee - _baseFee.mul(_highBuyFee).div(100);
} else if (amount >= balanceOf(uniswapV2Pair).mul(_moderateBuyImpact).div(100)) {
_teamFee = _baseFee - _baseFee.mul(_moderateBuyFee).div(100);
} else {
_teamFee = _baseFee;
}
uint walletBalance = balanceOf(address(to));
require(amount.add(walletBalance) <= _tTotal.mul(_maxWalletPercentage).div(100), "Amount exceeds max wallet holdings");
if (_maxBuyAmount > 0) {
require(amount <= _maxBuyAmount, "Amount exceeds max buy");
}
}
if(!_inSwap && from != uniswapV2Pair && _tradingOpen) {
if(_cooldownEnabled && !_isTimelockExempt[from]){
require(_cooldownTimer[from] < block.timestamp, "Please wait for cooldown between sells");
_cooldownTimer[from] = block.timestamp + _cooldownTimerInterval;
}
if (amount >= balanceOf(uniswapV2Pair).mul(_extremeSellImpact).div(100)) {
_teamFee = _baseFee + _baseFee.mul(_extremeSellFee).div(100);
} else if (amount >= balanceOf(uniswapV2Pair).mul(_highSellImpact).div(100)) {
_teamFee = _baseFee + _baseFee.mul(_highSellFee).div(100);
} else if (amount >= balanceOf(uniswapV2Pair).mul(_moderateSellImpact).div(100)) {
_teamFee = _baseFee + _baseFee.mul(_moderateSellFee).div(100);
} else {
_teamFee = _baseFee;
}
if (_maxSellAmount > 0) {
require(amount <= _maxSellAmount, "Amount exceeds max sell");
}
if(_getFeeOnSell && contractTokenBalance > minContractTokensToSwap) {
if(!_swapAll) {
contractTokenBalance = minContractTokensToSwap;
}
if (_liquidityFeePercentage > 0) {
swapAndLiquify(contractTokenBalance);
} else {
swapWithoutLiquify(contractTokenBalance);
}
}
}
}
bool takeFee = true;
if(_isExcludedFromFee[from] || _isExcludedFromFee[to] || _noTaxMode) {
takeFee = false;
}
if(!_takeFeeFromTransfer && !automatedMarketMakerPairs[from] && !automatedMarketMakerPairs[to]) {
takeFee = false;
}
_tokenTransfer(from,to,amount,takeFee);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);
}
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
uint256 teamFeePercentage = 100 - _liquidityFeePercentage;
uint256 amtForLiquidity = contractTokenBalance.mul(_liquidityFeePercentage).div(100);
uint256 halfLiq = amtForLiquidity.div(2);
uint256 amountToSwapForETH = contractTokenBalance.sub(halfLiq);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 feeBalance = ethBalance.mul(teamFeePercentage).div(100);
sendETHToFee(feeBalance);
uint256 ethForLiquidity = ethBalance - feeBalance;
if (halfLiq > 0 && ethForLiquidity > 0) {
// add liquidity
addLiquidity(halfLiq, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, amtForLiquidity);
}
}
function swapWithoutLiquify(uint256 contractTokenBalance) private lockTheSwap {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
function swapTokensForEth(uint256 tokenAmount) private {
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 manualSwapTokensForEth(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 sendETHToFee(uint256 amount) private {
(bool fee, ) = _FeeAddress.call{value: amount}("");
emit Response(fee);
}
function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee) private {
if(!takeFee)
removeAllFee();
_transferStandard(sender, recipient, amount);
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _taxFee, _teamFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if(rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function openTrading() external onlyOwner() {
require(!_tradingOpen,"trading is already open");
_tradingOpen = true;
_launchBlock = block.number;
}
function setFeeAddress (address payable feeAddress) external onlyOwner() {
_isExcludedFromFee[_FeeAddress] = false;
_FeeAddress = feeAddress;
_isExcludedFromFee[feeAddress] = true;
}
function excludeFromFee (address payable ad) external onlyOwner() {
_isExcludedFromFee[ad] = true;
}
function includeToFee (address payable ad) external onlyOwner() {
_isExcludedFromFee[ad] = false;
}
function setTakeFeeFromTransfer(bool onoff) external onlyOwner() {
_takeFeeFromTransfer = onoff;
}
function setBaseFee(uint256 fee) external onlyOwner() {
require(fee <= 10, "Base fee must be less than 10");
_baseFee = fee;
}
function setTaxFee(uint256 tax) external onlyOwner() {
require(tax <= 5, "tax must be less than 5");
_taxFee = tax;
}
function updateDynamicFees(uint256 moderateBuyImpact, uint256 highBuyImpact, uint256 extremeBuyImpact) public onlyOwner {
_moderateBuyImpact = moderateBuyImpact;
_highBuyImpact = highBuyImpact;
_extremeBuyImpact = extremeBuyImpact;
}
function updateBuyFees(uint256 moderateBuyFee, uint256 highBuyFee, uint256 extremeBuyFee) public onlyOwner {
_moderateBuyFee = moderateBuyFee;
_highBuyFee = highBuyFee;
_extremeBuyFee = extremeBuyFee;
}
function updateDynamicDump(uint256 moderateSellImpact, uint256 highSellImpact, uint256 extremeSellImpact) public onlyOwner {
_moderateSellImpact = moderateSellImpact;
_highSellImpact = highSellImpact;
_extremeSellImpact = extremeSellImpact;
}
function updateSellFees(uint256 moderateSellFee, uint256 highSellFee, uint256 extremeSellFee) public onlyOwner {
_moderateSellFee = moderateSellFee;
_highSellFee = highSellFee;
_extremeSellFee = extremeSellFee;
}
function setNoTaxMode(bool onoff) external onlyOwner() {
_noTaxMode = onoff;
}
function setLiquidityFeePercent(uint256 liquidityFee) external onlyOwner() {
require(_liquidityFeePercentage >= 0 && _liquidityFeePercentage <= 100, "liquidity fee percentage must be between 0 to 100");
_liquidityFeePercentage = liquidityFee;
}
function setMinContractTokensToSwap(uint256 numToken) external onlyOwner() {
minContractTokensToSwap = numToken;
}
function setMaxWalletPercentage(uint256 percentage) external onlyOwner() {
require(percentage >= 0 && percentage <= 100, "max wallet percentage must be between 0 to 100");
_maxWalletPercentage = percentage;
}
function setMaxBuy(uint256 amt) external onlyOwner() {
_maxBuyAmount = amt;
}
function setMaxSell(uint256 amt) external onlyOwner() {
_maxSellAmount = amt;
}
function setSwapAll(bool onoff) external onlyOwner() {
_swapAll = onoff;
}
function setBots(address[] calldata bots_) external onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
if (bots_[i] != uniswapV2Pair && bots_[i] != address(uniswapV2Router)) {
_bots[bots_[i]] = true;
}
}
}
function delBot(address notbot) external onlyOwner {
_bots[notbot] = false;
}
function isBot(address ad) public view returns (bool) {
return _bots[ad];
}
function manualswap() external onlyOwner() {
uint256 contractBalance = balanceOf(address(this));
manualSwapTokensForEth(contractBalance);
}
function manualsend() external onlyOwner() {
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function thisBalance() public view returns (uint) {
return balanceOf(address(this));
}
function amountInPool() public view returns (uint) {
return balanceOf(uniswapV2Pair);
}
// enable cooldown between trades
function changeCooldownSettings(bool newStatus, uint newInterval) external onlyOwner {
require(newInterval <= 10 minutes, "Cooldown exceeds the limit");
_cooldownEnabled = newStatus;
_cooldownTimerInterval = newInterval;
}
function changeGetFeeOnSell(bool status) external onlyOwner {
_getFeeOnSell = status;
}
function setIsTimelockExempt(address holder, bool exempt) external onlyOwner {
_isTimelockExempt[holder] = exempt;
}
function setAutomatedMarketMakerPair(address pair, bool value) external onlyOwner() {
require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
}
}