cosmos-valset-exporter is a Node.js application that exports Cosmos validator set information to Prometheus metrics. The application connects to a Cosmos node via a WebSocket and listens for new block events. When a new block event is received, the application fetches the validator set and the list of active validators and exports this information to Prometheus.

Clone the repository and install the dependencies:

git clone https://github.com/clemensgg/cosmos-valset-exporter
cd cosmos-valset-exporter
npm install

The application can be configured using environment variables:

• WEBSOCKET_URL: The URL of the WebSocket to connect to. Default: wss://rpc.cosmos.directory:443/cosmoshub/websocket
• REST_URL: The URL of the REST API to fetch data from. Default: https://rest.cosmos.directory:443/cosmoshub
• METRICS_PORT: The port that the metrics server will listen on. Default: 3013

Start the app:

npm run exporter

The application will connect to the WebSocket and start exporting metrics. Metrics can be viewed at http://localhost:<METRICS_PORT>/metrics.

The application exports the following metrics:

• validator_voting_power: Voting power of validators
• validator_set_hash: Deterministic hash of the validator set
• validator_power_updates: Validator power updates

MIT