Query System & Sync Status of Lighthouse (Readiness for the Merge)

query_lighthouse.sh

#! /bin/bash

curlcmd='curl -s -H "accept: application/json" -X GET'
host="http://localhost:5052"

temp=$(echo "scale=2; $(cat /sys/devices/virtual/thermal/thermal_zone0/temp) / 1000" | bc)
printf "Temperature: %.2f C.\n" ${temp}

home_avail=$(df -hBG /home --output=avail | grep -v Avail | grep -Eo "[0-9]+.[0-9]+")
printf "Available disk space on /home: %s GB.\n" ${home_avail}

mem_free=$(echo "scale=2; $(cat /proc/meminfo | grep MemAvailable: | grep -Eo "[0-9]+") / 1024 / 1024" | bc)
printf "Available RAM: %.2f GB.\n" ${mem_free}

lighthouse_version=$(${curlcmd} "${host}/eth/v1/node/version" | jq ".data.version")
printf "Lighthouse version: %s\n" ${lighthouse_version}

synced=$(${curlcmd} "${host}/lighthouse/syncing" | jq ".data")
printf "Lighthouse beacon node is %s.\n" ${synced,,}

peer_number=$(${curlcmd} "${host}/lighthouse/peers/connected" | jq ". | length")
printf "Lighthouse number of peers connected: %d.\n" ${peer_number,,}

eth1_sync_status=$(${curlcmd} "${host}/lighthouse/eth1/syncing" | jq ".data.eth1_node_sync_status_percentage")
printf "Geth is %d percent synced.\n" ${eth1_sync_status}

validator0=$(${curlcmd} "${host}/eth/v1/beacon/states/head/validators/0" | jq ".data.status")
printf "Status of validator 0 is %s.\n" ${validator0}

validator1=$(${curlcmd} "${host}/eth/v1/beacon/states/head/validators/1" | jq ".data.status")
printf "Status of validator 1 is %s.\n" ${validator1}

validator0_slashed=$(${curlcmd} "${host}/eth/v1/beacon/states/head/validators/0" | jq ".data.validator.slashed")
printf "Validator 0 is slashed: %s.\n" ${validator0_slashed}

validator1_slashed=$(${curlcmd} "${host}/eth/v1/beacon/states/head/validators/1" | jq ".data.validator.slashed")
printf "Validator 1 is slashed: %s.\n" ${validator1_slashed}

merge_ready_type=$(${curlcmd} "${host}/lighthouse/merge_readiness" | jq ".data.type")
printf "Lighthouse beacon node merge ready type: %s.\n" ${merge_ready_type}

This script assumes that you jq, curl and bc is installed.

If your node is running on a remote machine, you can run the script from your local machine by using the following command:
ssh $username@$remote 'bash -s' < query_lighthouse.sh