30 lines
871 B
Solidity
30 lines
871 B
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 "./ERC6150.sol";
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import "./interfaces/IERC6150Enumerable.sol";
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abstract contract ERC6150Enumerable is ERC6150, IERC6150Enumerable {
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function childrenCountOf(
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uint256 parentId
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) external view virtual override returns (uint256) {
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return childrenOf(parentId).length;
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}
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function childOfParentByIndex(
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uint256 parentId,
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uint256 index
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) external view virtual override returns (uint256) {
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uint256[] memory children = childrenOf(parentId);
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return children[index];
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}
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function indexInChildrenEnumeration(
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uint256 parentId,
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uint256 tokenId
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) external view virtual override returns (uint256) {
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require(parentOf(tokenId) == parentId, "wrong parent");
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return _getIndexInChildrenArray(tokenId);
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}
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}
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