PURPOSE Scheduled script to monitor an API-capable Node for outages or stalled chain height, sends email alert on error. Initially written for Symbol(XYM) nodes, but refactored for flexibility.

DESCRIPTION Checks node block height -- if no response from node OR no change in height since last check, send alert. Cycles through all .env files in the same folder as the script.

SETUP Provide relevant user defined variables in the .env file(s) (examples provided) Run on a recurring schedule (i.e. every 10 min)

Written for Python v3.9