The ERC-721 Standard
Non-fungible tokens.
What Is ERC-721?
ERC-721 is the standard for non-fungible tokens (NFTs). Unlike ERC-20, each token is unique and identified by a distinct tokenId.
NFTs represent ownership of one-of-a-kind items: art, collectibles, in-game assets, and more.
Fungible vs Non-Fungible
The key contrast:
- ERC-20 - all tokens identical and interchangeable, tracked by balance
- ERC-721 - each token unique, tracked by owner per tokenId
You own specific token #42, not a fraction of a pool.
All lessons in this course
- The ERC-721 Standard
- Minting NFTs
- Token Metadata
- Marketplaces