Deploy and Host Envio Indexer on Railway

This is an installation of the Envio indexer, Hasura, PostgreSQL and a public-facing GraphQL gateway that will get you up and running with the Envio blockchain indexing framework.

About Hosting

• PostgreSQL server
• Envio indexer
  • Performs the blockchain indexing
  • Pre-configured to index ERC20 Transfer events on Ethereum mainnet and Base
  • Can be easily customised for your indexing needs
  • Has variable definitions for the Envio HyperSync token and RPC URLs
• Hasura
  • Private Hasura installation, which exposes a GraphQL server for the data output by the Envio indexer
  • This is kept private to reduce the public surface area
• GraphQL gateway
  • Lightweight node server that allows for GET/POST GraphQL queries

Why Deploy

• This template makes it easy to self-host an Envio indexer

Common Use Cases

• Tracking ERC20 balances
• Tracking ERC20 liquidity
• Tracking protocol treasuries

Dependencies for

• Envio HyperSync API token (docs)

Deployment Dependencies

• None

Next Steps

• Customise the Envio indexer
  • Add the contract definitions in /apps/indexer/custom/config.yaml
  • Add the contract ABIs in /apps/indexer/custom/abis/
  • Add required entities in /apps/indexer/custom/schema.graphql
  • Add the contract event/block handlers in `/apps/indexer/custom/handlers/