Contract Source Code:
File 1 of 1 : Spark
/*
SPARK
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.18;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount)
external
returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) internal _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 internal _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);
uint256 currentAllowance = _allowances[sender][_msgSender()];
if(currentAllowance != type(uint256).max) {
require(
currentAllowance >= amount,
"ERC20: transfer amount exceeds allowance"
);
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
}
return true;
}
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender] + addedValue
);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(
currentAllowance >= subtractedValue,
"ERC20: decreased allowance below zero"
);
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
uint256 senderBalance = _balances[sender];
require(
senderBalance >= amount,
"ERC20: transfer amount exceeds balance"
);
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, 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);
}
}
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;
}
}
interface IDexRouter {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
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,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
}
interface IDexFactory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
interface IAntiSnipe {
function setTokenOwner(address owner, address pair) external;
function onPreTransferCheck(
address sender,
address from,
address to,
uint256 amount
) external returns (bool checked);
}
contract Spark is ERC20, Ownable {
IDexRouter public immutable dexRouter;
mapping(address => bool) public pairs;
address public lpPair;
address public constant USDC = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48;
uint8 constant _decimals = 9;
uint256 constant _decimalFactor = 10 ** _decimals;
bool private swapping;
uint256 public swapTokensAtAmount;
bool public swapEnabled = true;
address public taxAddress;
bool public buyTaxEnabled;
bool public sellTaxEnabled;
uint256 deadBlocks;
uint256 public walletLimit = 100;
uint256 public tradingActiveTime;
uint256 public launchBlock;
IAntiSnipe antibot;
bool public protectionEnabled = false;
bool public protectionDisabled = false;
mapping(address => bool) public _isExcludedFromFees;
event ExcludeFromFees(address indexed account, bool isExcluded);
event ProtectionToggle(bool isEnabled);
event ProtectionDisabled();
constructor() ERC20("Spark", "SPK") payable {
taxAddress = 0x29B292C45AE248D7DAd9Ed9804992c2A6Cb4405e;
address routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
dexRouter = IDexRouter(routerAddress);
_approve(msg.sender, routerAddress, type(uint256).max);
_approve(address(this), routerAddress, type(uint256).max);
lpPair = IDexFactory(dexRouter.factory()).createPair(address(this), USDC);
pairs[lpPair] = true;
IERC20(lpPair).approve(address(dexRouter), type(uint256).max);
IERC20(USDC).approve(address(dexRouter), type(uint256).max);
uint256 totalSupply = 1_000_000_000 * _decimalFactor;
excludeFromFees(msg.sender, true);
excludeFromFees(taxAddress, true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
_totalSupply = totalSupply;
uint256 lpTokens = totalSupply * 90 / 100;
_balances[address(this)] = lpTokens;
emit Transfer(address(0), address(this), lpTokens);
_balances[taxAddress] = totalSupply - lpTokens;
emit Transfer(address(0), taxAddress, totalSupply - lpTokens);
swapTokensAtAmount = (lpTokens * 5) / 10000; // 0.05 %
transferOwnership(msg.sender);
}
receive() external payable {}
function decimals() public pure override returns (uint8) {
return _decimals;
}
function getSellFees() public view returns (uint256) {
if(!sellTaxEnabled) return 0;
return 4;
}
function getBuyFees() public view returns (uint256) {
if(!buyTaxEnabled) return 0;
if(tradingActiveTime + 5 minutes < block.timestamp) return 5;
if(launchBlock + deadBlocks > block.number){ return 90; }
if(tradingActiveTime + 4 minutes < block.timestamp) return 10;
if(tradingActiveTime + 3 minutes < block.timestamp) return 15;
if(tradingActiveTime + 2 minutes < block.timestamp) return 20;
return 25;
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function circulatingSupply() public view returns (uint256) {
return totalSupply() - balanceOf(address(0xdead));
}
function checkWalletLimit(address recipient, uint256 amount) internal view {
require(balanceOf(recipient) + amount <= circulatingSupply() * walletLimit / 100, "Transfer amount exceeds the bag size.");
}
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");
require(amount > 0, "Amount must be greater than 0");
if (tradingActiveTime > 0 && !_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
if (!pairs[to] && to != address(0xdead) && to != address(dexRouter)) {
checkWalletLimit(to, amount);
}
uint256 fees = 0;
uint256 _sf = getSellFees();
uint256 _bf = getBuyFees();
if (swapEnabled && !swapping && pairs[to]) {
swapping = true;
swapBack(amount);
swapping = false;
}
if (pairs[to] &&_sf > 0) {
fees = (amount * _sf) / 100;
}
else if (_bf > 0 && pairs[from]) {
fees = (amount * _bf) / 100;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
if(protectionEnabled)
antibot.onPreTransferCheck(msg.sender, from, to, amount);
}
super._transfer(from, to, amount);
}
function swapTokensForUSDC(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> USDC
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = USDC;
dexRouter.swapExactTokensForTokensSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of USDC
path,
taxAddress,
block.timestamp
);
}
function swapBack(uint256 amount) private {
uint256 amountToSwap = balanceOf(address(this));
if (amountToSwap < swapTokensAtAmount) return;
if (amountToSwap > swapTokensAtAmount * 10) amountToSwap = swapTokensAtAmount * 10;
if (amountToSwap > amount) amountToSwap = 90 * amount / 100;
if (amountToSwap == 0) return;
swapTokensForUSDC(amountToSwap);
}
// withdraw ETH if stuck or someone sends to the address
function withdrawStuckETH() external {
bool success;
(success, ) = address(taxAddress).call{value: address(this).balance}("");
}
function withdrawStuckUSDC() external {
IERC20(USDC).transfer(taxAddress, IERC20(USDC).balanceOf(address(this)));
}
function launch(uint256 _deadBlocks, address _antibot, uint256 minUSDC) external payable onlyOwner {
require(tradingActiveTime == 0);
address[] memory path = new address[](2);
path[0] = dexRouter.WETH();
path[1] = USDC;
if(address(this).balance > 0)
dexRouter.swapExactETHForTokensSupportingFeeOnTransferTokens{value: address(this).balance}(minUSDC, path, address(this), block.timestamp);
dexRouter.addLiquidity(address(this), USDC, balanceOf(address(this)), IERC20(USDC).balanceOf(address(this)),0,0,msg.sender,block.timestamp);
deadBlocks = _deadBlocks;
launchBlock = block.number;
buyTaxEnabled = true;
sellTaxEnabled = true;
walletLimit = 2;
tradingActiveTime = block.timestamp;
if(protectionEnabled) {
antibot = IAntiSnipe(_antibot);
antibot.setTokenOwner(address(this), lpPair);
}
}
function updateSwapTokensAtAmount(uint256 newAmount) external onlyOwner {
require(newAmount >= (circulatingSupply() * 1) / 100000, "Swap amount cannot be lower than 0.001% total supply.");
require(newAmount <= (circulatingSupply() * 1) / 1000, "Swap amount cannot be higher than 0.1% total supply.");
swapTokensAtAmount = newAmount;
}
function setPair(address pair, bool value) external onlyOwner
{
require(pair != lpPair,"The main pair cannot be removed from pairs");
pairs[pair] = value;
}
function disableSwap() external onlyOwner {
swapEnabled = false;
}
function enableSwap() external onlyOwner {
swapEnabled = true;
}
function disableBuyTax() external onlyOwner {
buyTaxEnabled = false;
}
function enableBuyTax() external onlyOwner {
buyTaxEnabled = true;
}
function disableSellTax() external onlyOwner {
sellTaxEnabled = false;
}
function enableSellTax() external onlyOwner {
sellTaxEnabled = true;
}
function setProtectionEnabled(bool _protect) external onlyOwner {
if (_protect)
require(!protectionDisabled, "Protection disabled");
protectionEnabled = _protect;
emit ProtectionToggle(_protect);
}
function disableProtection() external onlyOwner {
protectionDisabled = true;
emit ProtectionDisabled();
}
function setWalletLimits(uint256 _limit) external onlyOwner {
require(_limit >= 1, "Wallet limit must be 1% or greater");
walletLimit = _limit;
}
}