A band address: the band's stable ID, and nothing else. A positional index is NOT a band
address — it renumbers when the curve grows or shrinks, so a caller holding one aims at
whichever band happens to have moved into that slot. An unknown id is a no-op.
A band address: the band's stable ID, and nothing else. A positional index is NOT a band address — it renumbers when the curve grows or shrinks, so a caller holding one aims at whichever band happens to have moved into that slot. An unknown id is a no-op.