abstract contract WithLimitedSupply {
	// Keeps track of how many we have minted
	uint256 private _tokenCount;

	/// @dev The maximum count of tokens this token tracker will issue.
	uint256 private immutable _maxAvailableSupply;

	/// Instanciate the contract
	/// @param maxSupply_ how many tokens this collection should hold
	constructor(uint256 maxSupply_, uint256 reserved_) {
		_maxAvailableSupply = maxSupply_ - reserved_;
	}

	function maxAvailableSupply() public view returns (uint256) {
		return _maxAvailableSupply;
	}

	/// @dev Get the current token count
	/// @return the created token count
	/// TODO: if this is not required externally, does making it `public view` use unneccary gas?
	function tokenCount() public view returns (uint256) {
		return _tokenCount;
	}

	/// @dev Check whether tokens are still available
	/// @return the available token count
	function availableTokenCount() public view returns (uint256) {
		return maxAvailableSupply() - tokenCount();
	}

	/// @dev Increment the token count and fetch the latest count
	/// @return the next token id
	function nextToken() internal virtual ensureAvailability returns (uint256) {
		return _tokenCount++;
	}

	/// @dev Check whether another token is still available
	modifier ensureAvailability() {
		require(availableTokenCount() > 0, 'No more tokens available');
		_;
	}

	/// @param amount Check whether number of tokens are still available
	/// @dev Check whether tokens are still available
	modifier ensureAvailabilityFor(uint256 amount) {
		require(
			availableTokenCount() >= amount,
			'Requested number of tokens not available'
		);
		_;
	}
}
/// @author Modified version of original code by 1001.digital
/// @title A token tracker that limits the token supply and increments token IDs on each new mint.
function nextToken() internal virtual ensureAvailability returns (uint256) {
	return _tokenCount++;
}

/// @dev Increment the token count and fetch the latest count
/// @return the next token id