Problem
Design a high-throughput transaction service that guarantees exactly-once processing.
Practicing as: Software Engineer interview at Airwallex PtyHi, I'll play your Airwallex Pty interviewer for the Software Engineer role. Candidates describe these interviews as often stressful and moderately difficult, so expect me to be direct and to the point. Take your time with the question above and answer like we're in the room.
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