This explanation is incorrect. Please read MN 38. View that nibbana = consiousness is eternalism.Baseless accusations, for i explained how consciousness is not the same thing as consciosness unestablished. I also explained how consciousness associated with contact is of six kinds.
Sitting to one side, that bhikkhu said to the Blessed One: “Is there, venerable sir, any consciousness that is permanent, stable, eternal, not subject to change, and that will remain the same just like eternity itself?”
“Bhikkhu, there is no consciousness that is permanent, stable, eternal, not subject to change, and that will remain the same just like eternity itself.”
(from SN 22.98)