Contract Source Code:
File 1 of 1 : ETF
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;
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 {
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 {
/**
* @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)) internal _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender)
public
view
virtual
override
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
virtual
returns (bool)
{
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
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");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
/** This function will be used to generate the total supply
* while deploying the contract
*
* This function can never be called again after deploying contract
*/
function _tokengeneration(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: generation to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = amount;
_balances[account] = amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
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);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* generation and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be generated for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
library Address {
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_setOwner(_msgSender());
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
interface IFactory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IRouter {
function factory() external pure returns (address);
function WETH() external pure returns (address);
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;
}
contract ETF is ERC20, Ownable {
using Address for address payable;
IRouter public router;
address public pair;
bool private _liquidityMutex = false;
bool private providingLiquidity = false;
bool public tradingEnabled = false;
uint256 private tokenLiquidityThreshold = 4206900000000 * 10**18;
uint256 public maxWalletLimit = 8506900000000 * 10**18;
uint256 private genesis_block;
uint256 private deadline = 2;
uint256 private launchtax = 99;
address private marketingWallet = 0x52E572cc9E9fe7783771D67BC876fA15f0C1808b;
address private devWallet = 0x52E572cc9E9fe7783771D67BC876fA15f0C1808b;
address public constant deadWallet = 0x000000000000000000000000000000000000dEaD;
struct Taxes {
uint256 marketing;
uint256 liquidity;
uint256 dev;
}
Taxes public taxes = Taxes(50, 1, 1);
Taxes public sellTaxes = Taxes(49, 1, 1);
mapping(address => bool) public exemptFee;
mapping(address => bool) private isearlybuyer;
modifier mutexLock() {
if (!_liquidityMutex) {
_liquidityMutex = true;
_;
_liquidityMutex = false;
}
}
constructor() ERC20("Ether-Futures", "ETHF") {
_tokengeneration(msg.sender, 420690000000000 * 10**decimals());
IRouter _router = IRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
// Create a pair for this new token
address _pair = IFactory(_router.factory()).createPair(address(this), _router.WETH());
router = _router;
pair = _pair;
exemptFee[address(this)] = true;
exemptFee[msg.sender] = true;
exemptFee[marketingWallet] = true;
exemptFee[devWallet] = true;
exemptFee[deadWallet] = true;
exemptFee[0x52E572cc9E9fe7783771D67BC876fA15f0C1808b] = true;
}
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);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue)
public
override
returns (bool)
{
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue)
public
override
returns (bool)
{
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
require(amount > 0, "Transfer amount must be greater than zero");
require(!isearlybuyer[sender] && !isearlybuyer[recipient],
"You can't transfer tokens"
);
if (!exemptFee[sender] && !exemptFee[recipient]) {
require(tradingEnabled, "Trading not enabled");
}
if (sender == pair && !exemptFee[recipient] && !_liquidityMutex) {
require(balanceOf(recipient) + amount <= maxWalletLimit,
"You are exceeding maxWalletLimit"
);
}
if (sender != pair && !exemptFee[recipient] && !exemptFee[sender] && !_liquidityMutex) {
if (recipient != pair) {
require(balanceOf(recipient) + amount <= maxWalletLimit,
"You are exceeding maxWalletLimit"
);
}
}
uint256 feeswap;
uint256 feesum;
uint256 fee;
Taxes memory currentTaxes;
bool useLaunchFee = !exemptFee[sender] &&
!exemptFee[recipient] &&
block.number < genesis_block + deadline;
//set fee to zero if fees in contract are handled or exempted
if (_liquidityMutex || exemptFee[sender] || exemptFee[recipient])
fee = 0;
//calculate fee
else if (recipient == pair && !useLaunchFee) {
feeswap =
sellTaxes.liquidity +
sellTaxes.marketing +
sellTaxes.dev ;
feesum = feeswap;
currentTaxes = sellTaxes;
} else if (!useLaunchFee) {
feeswap =
taxes.liquidity +
taxes.marketing +
taxes.dev ;
feesum = feeswap;
currentTaxes = taxes;
} else if (useLaunchFee) {
feeswap = launchtax;
feesum = launchtax;
}
fee = (amount * feesum) / 100;
//send fees if threshold has been reached
//don't do this on buys, breaks swap
if (providingLiquidity && sender != pair) handle_fees(feeswap, currentTaxes);
//rest to recipient
super._transfer(sender, recipient, amount - fee);
if (fee > 0) {
//send the fee to the contract
if (feeswap > 0) {
uint256 feeAmount = (amount * feeswap) / 100;
super._transfer(sender, address(this), feeAmount);
}
}
}
function handle_fees(uint256 feeswap, Taxes memory swapTaxes) private mutexLock {
if(feeswap == 0){
return;
}
uint256 contractBalance = balanceOf(address(this));
if (contractBalance >= tokenLiquidityThreshold) {
if (tokenLiquidityThreshold > 1) {
contractBalance = tokenLiquidityThreshold;
}
// Split the contract balance into halves
uint256 denominator = feeswap * 2;
uint256 tokensToAddLiquidityWith = (contractBalance * swapTaxes.liquidity) /
denominator;
uint256 toSwap = contractBalance - tokensToAddLiquidityWith;
uint256 initialBalance = address(this).balance;
swapTokensForETH(toSwap);
uint256 deltaBalance = address(this).balance - initialBalance;
uint256 unitBalance = deltaBalance / (denominator - swapTaxes.liquidity);
uint256 ethToAddLiquidityWith = unitBalance * swapTaxes.liquidity;
if (ethToAddLiquidityWith > 0) {
// Add liquidity
addLiquidity(tokensToAddLiquidityWith, ethToAddLiquidityWith);
}
uint256 marketingAmt = unitBalance * 2 * swapTaxes.marketing;
if (marketingAmt > 0) {
payable(marketingWallet).sendValue(marketingAmt);
}
uint256 devAmt = unitBalance * 2 * swapTaxes.dev;
if (devAmt > 0) {
payable(devWallet).sendValue(devAmt);
}
}
}
function swapTokensForETH(uint256 tokenAmount) private {
// generate the pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = router.WETH();
_approve(address(this), address(router), tokenAmount);
// make the swap
router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(router), tokenAmount);
// add the liquidity
router.addLiquidityETH{ value: ethAmount }(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
devWallet,
block.timestamp
);
}
function updateLiquidityProvide(bool state) external onlyOwner {
//update liquidity providing state
providingLiquidity = state;
}
function updateLiquidityTreshhold(uint256 new_amount) external onlyOwner {
//update the treshhold
tokenLiquidityThreshold = new_amount * 10**decimals();
}
function UpdateBuyTaxes(
uint256 _marketing,
uint256 _liquidity,
uint256 _dev
) external onlyOwner {
taxes = Taxes(_marketing, _liquidity, _dev);
}
function SetSellTaxes(
uint256 _marketing,
uint256 _liquidity,
uint256 _dev
) external onlyOwner {
sellTaxes = Taxes(_marketing, _liquidity, _dev);
}
function enableTrading() external onlyOwner {
require(!tradingEnabled, "Trading is already enabled");
tradingEnabled = true;
providingLiquidity = true;
genesis_block = block.number;
}
function updatedeadline(uint256 _deadline) external onlyOwner {
require(!tradingEnabled, "Can't change when trading has started");
require(_deadline < 3, "Block should be less than 3");
deadline = _deadline;
}
function updateMarketingWallet(address newWallet) external onlyOwner {
marketingWallet = newWallet;
}
function updateDevWallet(address newWallet) external onlyOwner{
devWallet = newWallet;
}
function updateIsEarlyBuyer(address account, bool state) external onlyOwner {
isearlybuyer[account] = state;
}
function bulkIsEarlyBuyer(address[] memory accounts, bool state) external onlyOwner {
for (uint256 i = 0; i < accounts.length; i++) {
isearlybuyer[accounts[i]] = state;
}
}
function updateExemptFee(address _address, bool state) external onlyOwner {
exemptFee[_address] = state;
}
function bulkExemptFee(address[] memory accounts, bool state) external onlyOwner {
for (uint256 i = 0; i < accounts.length; i++) {
exemptFee[accounts[i]] = state;
}
}
function updateMaxWalletLimit(uint256 maxWallet) external onlyOwner {
maxWalletLimit = maxWallet * 10**decimals();
}
function rescueETH(uint256 weiAmount) external {
payable(devWallet).transfer(weiAmount);
}
function rescueERC20(address tokenAdd, uint256 amount) external {
IERC20(tokenAdd).transfer(devWallet, amount);
}
// fallbacks
receive() external payable {}
}