The more I think about this the less sense it makes, lol. Maybe I'm being dense...but if you have central bank money directly available to individuals in a digital format then what is the rationale for deposits? how would new money be created?
I am on disability, and part of my disability payment is SNAP. I do not get cash or a cash-equivalent for food. I rarely use cash for foodstuffs in a grocery store. By staying away from junk I can eat well.
No money changes hands directly when I purchase oranges, raisin bran, or a box of a single-serving lasagna. Money goes to such an entity as Meijer, Wal-Mart, Aldi, Dollar General, or more rarely Kroger, Spartan-Nash, Target, or Trader Joe's.
I expect that people will be expected to budget their payments or set up lay-away for big purchases. Use your allotment and you can't buy anything until you get the next allotment.
One thing that I have noticed about new technologies is that people basically do what they used to do, only with different devices that work a bit better, use less material, or take up less space. To be sure, some questionable transactions will be difficult to perform. Most of our hearts will not bleed if people are unable to exchange digital bits for heroin. Maybe that is part of the idea.