Why can't we add a check in `stakeNFT` before staking is executed, such that it reverts if a token is already deposited by a user? about artstakes

[owl11]

Thank you for checking out the code, it is checked, just within the internal function _stakeNFT()

ArtStakes/src/L1ArtStakes.sol

Line 62 in 6b8be73

require(!stakedTokens[_NFTAddr][_tokenId], "Token already staked");

since the function checks the msg.sender metadata in the internal function, it is not checked in the public one, it can be moved onto the public one, however only the internal one fetches the user's registered metadata

ArtStakes/src/L1ArtStakes.sol

Lines 53 to 61 in 6b8be73

	function _stakeNFT() internal {
	require(
	registeredMetadata[msg.sender] == true,
	"Unregistered Metadata"
	);
	(uint256 _tokenId, , , , , , , ERC721 _NFTAddr) = getUserMetadata(
	msg.sender
	);

it however fails to account for multiple NFT's from the same user