ChainGraph
An open-source GraphQL toolkit for indexing, streaming, and querying EOSIO and Antelope blockchain data.

ChainGraph is an open-source GraphQL toolkit for EOSIO and Antelope applications, with realtime subscriptions and queries across multiple chains.
I built it as a side project while working at Bitcash and owned the architecture, technology choices, and implementation, including the package that streams chain data to subscribers in realtime.
Achievements
- Built a realtime GraphQL subscription toolkit for EOSIO and Antelope chains.
- Implemented chain data indexing and event streaming.
- Designed one GraphQL interface for querying multiple blockchain networks.
Link: https://chaingraph.io
Stack: Antelope, Node.js, Docker, GraphQL, GCP, RxJS, TypeScript, PostgreSQL
Repo: https://github.com/blockmatic/chaingraph