Banking System Coding Exercise (Multi-Currency + History Replay Follow-ups)

Problem: Banking System Coding Exercise (Multi-Currency + History Replay Follow-ups) The post mentions a "banking system" problem with follow-ups for multiple currency types and history replay, but it does not provide required APIs, I/O format, constraints, definition of "history replay", examples, or scale assumptions. Therefore it cannot be reconstructed into a well-defined coding prompt. Per instruction, incomplete questions are ignored and not provided as a solvable prompt.