The checkMintTransfer() is a public method that allows users to check whether the given TPA names are available for purchase or have already been minted. It takes two input parameters: _names, an array of bytes32 representing the TPA names to be checked, and _amounts, an array of uint32 representing the amount of TPAs to be checked.
The mintTransfer() is a payable method that allows users to buy newly minted TPAs. To use this method, you need to send plaquePrice * _names.length amount of value in Wei to this transaction as TPAs price.
The tokenOwners() is a public method that takes a plaque ID _plaqueId as input and returns an array of addresses of token owners who own the plaque with the given ID.
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