How to create a custom error message when anything in a bash scripts fails?

Question

How can I create a custom error message, without checking the return code of the last command everytime?

I want to log an event to a log file, when the script succeeded or fails (anywhere in the script). Anything like this:

# cat /var/log/myscript.log
name: myscript | state: failed | date: 2021-01-18
name: myscript | state: succeeded | date: 2021-01-19

Regards