Financial Events System
An architecture based on Event Sourcing where the system stores the sequence of immutable events rather than just the current state.
Key Details
- Built on Event Sourcing principles where the immutable event log is the source of truth and current state is derived by replaying events
- Financial events include payments initiated, charges settled, refunds processed, disputes opened, and settlements completed
- Enables temporal queries — you can reconstruct the exact state of any account at any point in time by replaying events up to that timestamp
- CQRS (Command Query Responsibility Segregation) is commonly used alongside event sourcing, separating write operations from read projections for performance
- Critical for audit compliance because the event log provides a complete, immutable history of every financial state change