Problem
Design the database schema for a high-concurrency digital wallet system at Super.Money, detailing tables, primary keys, indexes, and relationships.
Practicing as: Software Engineer interview at Super.MoneyHi, I'll play your Super.Money interviewer for the Software Engineer role. Candidates describe these interviews as mixed and hard, so expect me to be structured and detail-hungry. Take your time with the question above and answer like we're in the room.
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