kumomta/docs/reference/tsa/configure_tsa_db_path.md

kumo.configure_tsa_db_path(PATH)

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This function should be called only from inside your tsa_init event handler, and MUST be called before kumo.tsa.start_http_listener.

Its purpose is to specify the path in which the tsa-daemon will persist event and configuration information in a local sqlite database.

The default value for PATH is "/var/spool/kumomta/tsa.db".

Since the path is passed to sqlite, you may use URI filenames as specified in the sqlite3_open documentation, such as ":memory:" to use an in-memory database that will be discarded when the tsa-daemon is restarted.