The chord the figures name, carrying the given bass as its bassPc and
the letter spellings of its root and bass as enharmonic hints.
The spelled notes, bass first and then each figured interval in ascending order. They carry no octave: figures fix the intervals above the bass, not the register the upper voices take them in.
Every moving figure, in written order, or an empty array for a static one. The chord above is the harmony these resolve into.
Everything a figured bass states: the chord, its spelled notes, and any figure that moves.