interface IERC2981 is IERC165 {
    /**
     * @dev Called with the sale price to determine how much royalty is owed and to whom.
     * @param tokenId - the NFT asset queried for royalty information
     * @param salePrice - the sale price of the NFT asset specified by `tokenId`
     * @return receiver - address of who should be sent the royalty payment
     * @return royaltyAmount - the royalty payment amount for `salePrice`
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external
        view
        returns (address receiver, uint256 royaltyAmount);
}
/**
 * @dev Interface for the NFT Royalty Standard
 */
function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external
        view
        returns (address receiver, uint256 royaltyAmount);
/**
 * @dev Called with the sale price to determine how much royalty is owed and to whom.
 * @param tokenId - the NFT asset queried for royalty information
 * @param salePrice - the sale price of the NFT asset specified by `tokenId`
 * @return receiver - address of who should be sent the royalty payment
 * @return royaltyAmount - the royalty payment amount for `salePrice`
 */