Clear DefinitionsCollection Registry
1 min read
Pronunciation
[kuh-lek-shun rej-uh-stree]
Analogy
Like a library card catalog listing all books, authors, and subjects so patrons can find what they need.
Definition
A smart contract or off‑chain index that catalogs NFT collections, their metadata schemas, and provenance for discovery and verification.
Key Points Intro
Collection registries standardize NFT discovery and metadata validation.
Key Points
Schema definitions: Records expected metadata fields and types.
Ownership mapping: Tracks token IDs and current holders.
Verification: Flags collections verified by platform governance.
Search API: Provides endpoints for querying by attributes or creators.
Example
OpenSea’s registry stores collection slugs, schema version, and verification badge status to display on its marketplace.
Technical Deep Dive
Registry contract stores mapping `collectionAddress → schemaCID` on IPFS. Indexers subscribe to `Transfer` events to maintain ownership tables in a Postgres DB. GraphQL APIs enable attribute‑based filtering.
Security Warning
Unverified collections may spoof popular projects; rely only on registry-verified entries for high-value trades.
Caveat
Off‑chain registries can be censored; on‑chain registries incur gas for updates.
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