monitor-medalla-participation-lighthouse.py

import itertools
import time
import requests

LH_URL = "http://<host-elided>/consensus/global_votes"
MEDALLA_GENESIS_TIME = 1596546008

def _current_epoch():
    t = int(time.time())
    return (t - MEDALLA_GENESIS_TIME) // 12 // 32

def _query_rate(epoch):
    url = f"{LH_URL}?epoch={epoch}"
    status = requests.get(url).json()
    attesting_gwei = status["previous_epoch_attesting_gwei"]
    total_gwei = status["previous_epoch_active_gwei"]
    return attesting_gwei / total_gwei

def main():
    for _ in itertools.count():
        epoch = _current_epoch() - 1
        participation_rate = _query_rate(epoch)
        print(f"rate at epoch {epoch}: {participation_rate}")
        time.sleep(32 * 12)  # SLOTS_PER_EPOCH * SECONDS_PER_SLOT

if __name__ == '__main__':
    main()