The Graph Concepts
what data can Subgraphs query:
- historical events
- state variable
- view/pure function
The data update mechanism of Subgraphs:
Event-based updates (eventHandlers)
Block-triggered update (blockHandlers)
GraphQL Basic Concepts
How to access blockchain data using subgraph?
- Query directly on the playground.
- Querying through curl.
- Querying through typescript.
