ERC-998
ERC-998 is an Ethereum token standard that enables composable non-fungible tokens (NFTs) by allowing an NFT to own other tokens, including ERC-20, ERC-721, and other ERC-998 tokens. It creates a hierarchical structure where a parent NFT can manage and transfer its child tokens as a single unit, facilitating complex digital asset ownership like virtual worlds, gaming items, or bundled collectibles. This standard extends the functionality of NFTs beyond simple ownership to include composability and nested asset management.
Developers should learn ERC-998 when building decentralized applications (dApps) that require complex asset bundling, such as in blockchain-based games where a character NFT might own weapons and armor as separate tokens, or in digital art platforms for creating collections. It is particularly useful for scenarios where assets need to be grouped and transferred together while maintaining individual token identities, enhancing interoperability and reducing transaction overhead in multi-token ecosystems.