Unique docs

Collection schemas

Since collections and tokens have properties that are simple key-value stores, the user can put any data into the collection and token.
And although it's very useful to have a free structure of data it's not convenient to get into a field without any rules.

Thus, we offer two well-known schemas to use on our chains:

  • Unique schema
  • ERC721Metadata schema

Unique schema

Unique schema is a schema where all links and metadata is stored on-chain. It allows to store data and attributes flexible with separate access settings for every token field.
This allows, for example, to make a live token, where some parts of the token can be securely changed with guarantees from the blockchain that other parts won't be changed.

Full documentation for properties and structure for the Unique schema can be found here

ERC721Metadata schema

ERC721Metadata schema is a schema where token data is stored off-chain, in a common way for the Ethereum world, where the chain stores just a link to an off-chain JSON file.
We presume that the off-chain JSON file should follow the ERC721Metadata JSON Schemaopen in new window or its extension Opensea data formatopen in new window.

Full documentation for properties and structure for the ERC721Metadata schema can be found here