Tfchain graphql

Subsquid is used to index and provide a graphql interface on top of tfchain.

Concept

The substrate events are processed in a multi-step pipeline:

Tfchain => Squid Indexer => Indexer GraphQL gateway => Squid Processor => Database => Query Node GraphQL endpoint

Prerequisites

• Node v16x
• Docker
• Docker-compose

Running

see docs

Project layout

• indexer - docker-compose setup for the indexer
• db - Processor db migration files
• scripts - Scripts for generating initial state and development scripts
• src - Source
  • mappings - Mapper functions for the indexer data
  • model - Generated models from the schema.graphql file
  • types - Type files that require manual edit if the schema changes / or chain types change
  • processor.ts - Processor entrypoint
• typegen - Where the declaration files are generated from (used for development)
  • tfchainVersions.jsonl - Generated tfchain runtime versions and their data
  • typegen.json - Typegen config
  • typesBundle.json - Typegen bundle config
• schema.graphql - The graphql schema file, changes to this file will results in changes to the models (src/models)