57 lines
1.8 KiB
Solidity
57 lines
1.8 KiB
Solidity
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// SPDX-License-Identifier: CC0-1.0
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pragma solidity ^0.8.0;
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import "IERC721.sol";
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import "IERC165.sol";
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/**
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* @title ERC-6150 Hierarchical NFTs Token Standard
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* @dev See https://eips.ethereum.org/EIPS/eip-6150
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* Note: the ERC-165 identifier for this interface is 0x897e2c73.
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*/
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interface IERC6150 is IERC721, IERC165 {
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/**
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* @notice Emitted when `tokenId` token under `parentId` is minted.
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* @param minter The address of minter
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* @param to The address received token
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* @param parentId The id of parent token, if it's zero, it means minted `tokenId` is a root token.
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* @param tokenId The id of minted token, required to be greater than zero
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*/
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event Minted(
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address indexed minter,
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address indexed to,
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uint256 parentId,
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uint256 tokenId
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);
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/**
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* @notice Get the parent token of `tokenId` token.
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* @param tokenId The child token
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* @return parentId The Parent token found
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*/
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function parentOf(uint256 tokenId) external view returns (uint256 parentId);
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/**
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* @notice Get the children tokens of `tokenId` token.
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* @param tokenId The parent token
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* @return childrenIds The array of children tokens
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*/
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function childrenOf(
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uint256 tokenId
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) external view returns (uint256[] memory childrenIds);
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/**
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* @notice Check the `tokenId` token if it is a root token.
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* @param tokenId The token want to be checked
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* @return Return `true` if it is a root token; if not, return `false`
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*/
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function isRoot(uint256 tokenId) external view returns (bool);
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/**
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* @notice Check the `tokenId` token if it is a leaf token.
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* @param tokenId The token want to be checked
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* @return Return `true` if it is a leaf token; if not, return `false`
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*/
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function isLeaf(uint256 tokenId) external view returns (bool);
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}
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