you can build the keg size and keg date sensors by going to "Settings" and select "Device and Services". At the top left select helpers and on the bottom left you can add these using the date and number functions.
https://github.com/lagerbeer/kegcop_home_assistant
OPERATION:
The tool is managed in the screen below. There are only three functions that need to be managed.
New Keg Date: enter in the date that the keg is tapped. The tool will add up the pulses based on the start date. Change date when...