Confirmation List for Developer

The following architectural decisions were inferred from code patterns and are marked for developer confirmation:

1. [CONFIRM WITH DEVELOPER]: Double-entry accounting ledger was chosen over simple balance updates specifically to guarantee regulatory auditability.
2. [CONFIRM WITH DEVELOPER]: Token blacklist was implemented with MongoDB TTL indexing rather than Redis to minimize external infrastructure dependencies.
3. [CONFIRM WITH DEVELOPER]: Transaction amounts are stored as decimal floating numbers; converting to integer cents would prevent IEEE 754 precision issues.