DCIPs/assets/eip-4671/IERC4671.sol

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// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/introspection/IERC165.sol";
interface IERC4671 is IERC165 {
/// Event emitted when a token `tokenId` is minted for `owner`
event Minted(address owner, uint256 tokenId);
/// Event emitted when token `tokenId` of `owner` is revoked
event Revoked(address owner, uint256 tokenId);
/// @notice Count all tokens assigned to an owner
/// @param owner Address for whom to query the balance
/// @return Number of tokens owned by `owner`
function balanceOf(address owner) external view returns (uint256);
/// @notice Get owner of a token
/// @param tokenId Identifier of the token
/// @return Address of the owner of `tokenId`
function ownerOf(uint256 tokenId) external view returns (address);
/// @notice Check if a token hasn't been revoked
/// @param tokenId Identifier of the token
/// @return True if the token is valid, false otherwise
function isValid(uint256 tokenId) external view returns (bool);
/// @notice Check if an address owns a valid token in the contract
/// @param owner Address for whom to check the ownership
/// @return True if `owner` has a valid token, false otherwise
function hasValid(address owner) external view returns (bool);
}