30 lines
936 B
Solidity
30 lines
936 B
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.6.2;
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import "./IERC721.sol";
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/**
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* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
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* @dev See https://eips.ethereum.org/EIPS/eip-721
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*/
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interface IERC721Enumerable is IERC721 {
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/**
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* @dev Returns the total amount of tokens stored by the contract.
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*/
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function totalSupply() external view returns (uint256);
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/**
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* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
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* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
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*/
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function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
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/**
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* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
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* Use along with {totalSupply} to enumerate all tokens.
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*/
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function tokenByIndex(uint256 index) external view returns (uint256);
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}
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