checks the balance of an account on an EVM chain and reports it via a Webhook (tested with Discord)

balancecheck.py

# checks the balance of the given account and reports it via webhook
# usage:
# python3 balancecheck.py <account> <min_balance>
# ENV vars: RPC, WEBHOOK

import requests
import sys
import os

account = sys.argv[1]
min_balance = float(sys.argv[2])

rpc = os.environ['RPC']
webhook = os.environ['WEBHOOK']

chainid_res = requests.post(rpc, json = {"method": "eth_chainId", "params": [], "id":1, "jsonrpc":"2.0"})
chainid = int(chainid_res.json()['result'], 16)
#print(f'chainId: {chainid}')

balance_query = {
  "method": "eth_getBalance",
  "params": [ account ],
  "id":2,
  "jsonrpc":"2.0"
}

balance_res = requests.post(rpc, json = balance_query)
balance = int(balance_res.json()['result'], 16)
balance_human = balance / 1e18
#print(f'balance: {balance}, human: {balance_human}')

raise_alert = True if balance_human < min_balance else False

report = {'content': f"{'@here ⚠️ ' if raise_alert else ''}Balance of {account} on chain {chainid} is {balance_human}"}

report_response = requests.post(webhook, data = report)
assert report_response.ok == True