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hydra
v3
Hydra
Hydra CLI
Hydra Indexer
Hydra Indexer Gateway
Hydra Processor
Hydra Typegen
Overview
Query Node Manifest
Graphql Queries
Pagination
Sorting
Mappings
Schema
Architecture
Install Hydra
Migration to Hydra v2
What's new in Hydra v3
FAQ
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Overview
Introducing Hydra, a GraphQL query node for substrate chains

Bird-eye overview

​Hydra has two principal components: Hydra Indexer and Hydra Processor. Hydra Indexer ingests raw data from a substrate chain. Hydra Processor is responsible for transforming the raw data into domain-level entities as defined in schema.graphl and the event handlers, both provided by the user. hydra-cli provides additional scaffolding and codegen tooling for running and developing a Hydra Processor tailored for the provided schema file.
Hydra Indexer (top) and Hydra Processor (bottom) data flows

What's next?

  • Explore live Hydra Indexer playground and query Kusama events and extrinsics
  • ​Install Hydra toolkit
  • Hydra tutorial: spin a query node in under five minutes
  • Look at the examples
  • Learn how to define your own data schema and mappings to run a Hydra Indexer
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Query Node Manifest
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Bird-eye overview
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