Origin Indexing Servers

This directory contains code for Origin Indexing Servers:

• listener: Server that listens to events emitted by Origin contracts and indexes them.
• apollo: GraphQL server for indexed data
• lib: library for indexing data in various backend. Currently Postgres and Elasticsearch are supported.

⚠️ Note that this is a standalone npm package apart from origin-js, and is not included in the distributed origin-js package. Once we move to a monorepo, it will be in a separate directory alongside origin-js.

To start the listener

Use origin-box to start an origin-js container.

docker-compose up origin-js

If you want to index data in Postgres:

docker-compose up postgres  # start the postgres container.

Run the database migrations:

docker exec -ti -e DATABASE_URL=postgres://origin:origin@postgres/origin -w /app/daemon/indexing origin-js node node_modules/db-migrate/bin/db-migrate up

If you want to index data in Elasticsearch, start the elasticsearch container.

docker-compose up elasticsearch

Start the listener in the the origin-js container. Use --elasticsearch and/or --db options to pick the indexer(s).

docker exec -w /app/daemon/indexing origin-js node listener/listener.js --elasticsearch --db

You should see messages in the console indicating events are being indexed.

To start the Apollo GraphQL server

You will need to update the origin-box:docker-compose.yml. For the image origin-js, proxy port 4000 to 4000 for the Apollo server. [TODO: update origin-box config]

Use origin-box to start an origin-js container.

docker-compose up origin-js

Start the Apollo server in the origin-js container

docker exec -w /app/daemon/indexing origin-js node apollo/index.js

The server should start and you can point your browser to http://localhost:4000 to access the GraphQL playground.