Modifier isValidAmount should check for strict equality

[cleanunicorn]

Description

When a user calls the methods mint or batchMint, they need to provide the correct amount of ether in order to buy the tokens. The ether amount is checked in the modifier isValidAmount.

review-casinoverse-land-2022-08/code/contracts/Land.sol

Lines 239 to 247 in 0c7e33d

	/**
	* @dev Throws if amount is not enough
	*
	* @param _nftQty quantity of nft to mint
	*/
	modifier isValidAmount(uint256 _nftQty) {
	require(msg.value >= (mintPrice * _nftQty), "Invalid Amount");
	_;
	}

The check makes sure that the user sent the ether amount that is equal to or higher than the necessary one.

require(msg.value >= (mintPrice * _nftQty), "Invalid Amount");

Recommendation

Change the check to make sure the amount sent is exactly equal to the required amount. Making this change will protect the users from making mistakes and sending too much ether into the contract.