Easily Access Blockchain Data with Subgraphs
summary
Demonstrates building a subgraph that listens to smart contract events, runs assemblyscript mappings, stores indexed records in Postgres and IPFS, and exposes a GraphQL API; replaces slow JSON‑RPC loops that can cause 10–20s NFT loads. Claims the decentralized network runs ~465 indexers, ~1–2 billion queries/day, ~700 public subgraphs and uses delegators/curators to signal quality. Shows a working greeting-contract example, CLI/studio workflow to generate, deploy and query a subgraph.
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chapters (15)
- 0:00Introduction and setup
- 1:08What is a blockchain
- 2:56Smart contracts explained
- 4:00Problems with blockchain data
- 7:55Introducing The Graph
- 9:22How The Graph works
- 12:11What is a subgraph
- 14:41Subgraph architecture
- 15:25Querying data on The Graph
- 17:11Industry standard subgraphs
- 18:34Graph client layer
- 21:06Workshops and resources
- 22:30Subgraph configuration
- 27:26Deploying a subgraph
- 28:44Q&A
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