ERC721-O

ERC721-O is a standard interface and implementation for omnichain non-fungible tokens (NFT) based on ERC721.

It aims to allow third-party applications (e.g., wallet/marketplace) to interact with any token implemented in this interface uniformly.

It also enables the implementation of multiple new features and proposed solutions to mitigate security issues in the cross-chain domain.

You can find our full introduction here.