Where can get the list of the email body parameter

I want a list of the email body parameter of the discourse which I can used in the emailer body like %{site_name}, %{email_token} etc.

From what I have explored titles have different email parameters and bodies have different parameters. I want to edit the emailer body and want to implement these emailer parameters in the body part but have no idea what parameter is available to use.

can I get the list of the body emailer parameter which I can use in the emailer body?