Using a Substreams Sink

Once you find a package that fits your needs, you can choose how you want to consume the data. Sinks are integrations that allow you to send the extracted data to different destinations, such as a SQL database, or a file.

Note: Some of the sinks are officially supported by StreamingFast (i.e. active support is provided), but other sinks are community-driven and support can't be guaranteed.

ERROR[05-30|14:15:57.801] Low disk space. Gracefully shutting down Geth to prevent database corruption. available=834.20MiB path=/root/.ethereum/geth

• SQL Database: Send the data to a database.

• Direct Streaming: Stream data directly from your application.

• PubSub: Send data to a PubSub topic.

• Community Sinks: Explore quality community maintained sinks.

Deployable Service: If you’d like your sink (e.g., SQL or PubSub) to be hosted for you, reach out to the StreamingFast team here.

Navigating Sink Repos

Official

Name	Support	Maintainer	Source Code
SQL	O	StreamingFast	substreams-sink-sql
Go SDK	O	StreamingFast	substreams-sink
Rust SDK	O	StreamingFast	substreams-sink-rust
JS SDK	O	StreamingFast	substreams-js
KV Store	O	StreamingFast	substreams-sink-kv
Prometheus	O	Pinax	substreams-sink-prometheus
Webhook	O	Pinax	substreams-sink-webhook
CSV	O	Pinax	substreams-sink-csv
PubSub	O	StreamingFast	substreams-sink-pubsub

Community

Name	Support	Maintainer	Source Code
MongoDB	C	Community	substreams-sink-mongodb
Files	C	Community	substreams-sink-files
KV Store	C	Community	substreams-sink-kv
Prometheus	C	Community	substreams-sink-Prometheus

• O = Official Support (by one of the main Substreams providers)

• C = Community Support