It works by running a nwaku node, publishing a message from it every fixed interval and performing a store query to all the store nodes we want to monitor to check they respond with the last message we published.

Instructions

Create an .env file which will contain the configuration parameters. You can start by copying .env.example and adapting it for your use case

cp .env.example .env
${EDITOR} .env

The variables that have to be filled for Sonda are

CLUSTER_ID=
SHARD=
# Comma separated list of store nodes to poll
STORE_NODES=
# Wait time in seconds between two consecutive queries
QUERY_DELAY=
# Consecutive successful store requests to consider a store node healthy
HEALTH_THRESHOLD=

If you want to query nodes in cluster-id 1, then you have to follow the steps of registering an RLN membership. Otherwise, you can skip this step.

For it, you need:
- Ethereum Linea Sepolia WebSocket endpoint. Get one free from Infura.
- Ethereum Linea Sepolia account with minimum 0.01ETH. Get some here.
- A password to protect your rln membership.
Fill the RLN_RELAY_ETH_CLIENT_ADDRESS, ETH_TESTNET_KEY and RLN_RELAY_CRED_PASSWORD env variables and run
```
./register_rln.sh
```
Start Sonda by running
```
docker-compose up -d
```
Browse to http://localhost:3000/dashboards and monitor the performance

There's two Grafana dashboards: nwaku-monitoring to track the stats of your node that is publishing messages and performing queries, and sonda-monitoring to monitor the responses of the store nodes.