Fintech & Commerce
Design a Financial Ledger System (Double-entry accounting scale)
An immutable, append-only double-entry ledger guaranteeing every balance is reconstructible and every transaction is atomically balanced.
Open and Simulate this Architecture in InfraDraftCore Architectural Components
Immutable Append-Only Ledger Store
Every entry is written once and never mutated, only appended to or reversed.
Double-Entry Transaction Engine
Enforces that every transaction's debits and credits balance to zero.
Account Balance Materialization Service
Derives current balances from the entry log efficiently, without replaying history on every read.
Idempotency Key Store
Prevents a retried request from posting the same transaction twice.
Reconciliation & Audit Service
Continuously verifies the ledger against external sources of truth.
Multi-Currency Conversion Service
Handles exchange-rate application consistently across entries.
Transaction Journal Replay/Recovery Service
Rebuilds derived state from the immutable log after any failure.