Multiverse NFT EIP-5606

MultiverseNFT.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

/**
 * Interface of the Multiverse NFT standard as defined in the EIP.
 */
interface IMultiverseNFT {
    /**
     * struct to store delegate token details
     *
     */
    struct DelegateData {
        uint256 tokenId;
        uint256 quantity;
        address contractAddress;
    }

    /**
     * Emitted when one or more new delegate NFTs are added to a Multiverse NFT
     *
     */
    event Bundled(
        DelegateData[] delegateData,
        uint256 multiverseTokenID,
        address ownerAddress
    );

    /**
     * Emitted when one or more delegate NFTs are removed from a Multiverse NFT
     */
    event Unbundled(uint256 multiverseTokenID, DelegateData[] delegateData);

    /**
     * Accepts the tokenId of the Multiverse NFT and returns an array of delegate token data
     */
    function delegateTokens(uint256 multiverseTokenID)
        external
        view
        returns (DelegateData[] memory);

    /**
     * Removes one or more delegate NFTs from a Multiverse NFT
     * This function accepts the delegate NFT details, and transfer those NFTs out of the Multiverse NFT contract to the owner's wallet
     */
    function unbundle(
        DelegateData[] memory delegateData,
        uint256 multiverseTokenID
    ) external;

    /**
     * Adds one or more delegate NFTs to a Multiverse NFT
     * This function accepts the delegate NFT details, and transfers those NFTs to the Multiverse NFT contract
     * Need to ensure that approval is given to this Multiverse NFT contract for the delegate NFTs so that they can be transferred programmatically
     */
    function bundle(
        DelegateData[] memory delegateData,
        uint256 multiverseTokenID
    ) external;

    /**
     * Initializes a new bundle, mints a Multiverse NFT and assigns it to msg.sender
     * Returns the token ID of a new Multiverse NFT
     * Note - When a new Multiverse NFT is initialized, it is empty, it does not contain any delegate NFTs
     */
    function initBundle(DelegateData[] memory delegateData) external;
}