Celo missed minet block alert

celo_telegram_alert_bot.py

#!/usr/bin/python3

### Monitor a celo validator and send telegram notification if validator fails to mine a block in a timely fashion.
#
#    Suggest you run this from screen so that it will keep an eye
#    on your validator even when your terminal is detached.
#
###

import sys
import json
import requests
import os

from time import sleep
from datetime import datetime
from datetime import timedelta

CHECK_INTERVAL = 300    # how often to check for validator failures
MINING_THRESHOLD = 10 # minutes we must mine a block else trigger an alert

base_url = "https://explorer.celo.org/api?module=account&action=getminedblocks&page=1&offset=1&address="
address = "YOUR_VALIDATOR_SIGNER_ADDRESS"

def get_stake_data():
    try:
        response = requests.get(base_url + address)
        stake_data = response.json()
        return(stake_data)
    except:
        e = sys.exc_info()[0]
        write_to_page( "<p>Error: %s</p>" % e )


def telegram_bot_sendtext(bot_message):
    
    bot_token = ''
    bot_chatID = ''
    send_text = 'https://api.telegram.org/bot' + bot_token + '/sendMessage?chat_id=' + bot_chatID + '&parse_mode=Markdown&text=' + bot_message

    response = requests.get(send_text)

    return response.json()


#main
while True:
    stake_data = get_stake_data()
    print(stake_data);
    print("Last block mined at: %s " % stake_data['result'][0]['timeStamp']);
    # had to strip the 'Z' off the timestamp we get from Celo's API. <shrug>
    lastBlockTime = datetime.strptime((stake_data['result'][0]['timeStamp'])[:-1], '%Y-%m-%d %H:%M:%S.%f')
    print(lastBlockTime)
    timeNow=datetime.utcnow();
    timeDiff=(timeNow - lastBlockTime)
    print("Time now: %s" % timeNow);
    print("Time since last block mined: %s" % timeDiff)
    threshold = timedelta(minutes = MINING_THRESHOLD);
    if timeDiff > threshold:
        print("No block mined in %s minutes" % threshold)
        message_content = "Celo monitor found no blocks mined for past %s minutes. Last block mined at %s GMT" % (threshold, lastBlockTime)
        print("message_content = %s" % message_content)
        telegram_bot_sendtext(message_content)
    else:
        print("Found a block mined within the last %s minutes" % threshold)
    print("Sleeping for %i seconds" % CHECK_INTERVAL);
    sleep(CHECK_INTERVAL)