RELATED CONCEPT
Double-Entry Ledger
A double-entry ledger is an accounting system where every financial transaction requires at least two balanced entries: a debit to one or more accounts and an equal credit to one or more accounts.
FINANCIAL INFRASTRUCTURE CONCEPT
Event Sourcing
Event sourcing is an architectural design pattern where all state changes in an application are stored as an immutable, sequential sequence of append-only events.
Architectural context & analysis
Instead of storing only the current balance of an account in a database row, event sourcing records every deposit, withdrawal, transfer, and fee as an indelible historical fact.
Current balances are derived by replaying events up to a given point in time, providing built-in historical auditing, time-travel debugging, and perfect reconciliation capability.
Worked operational scenario
To calculate an account balance at midnight on December 31st for regulatory reporting, the engine replays all ledger events from account opening up to that exact microsecond.
Implementation considerations & controls
Implement periodic state snapshotting to maintain sub-millisecond read response times while preserving the underlying raw event stream indefinitely.
CONCEPTUAL RELATIONSHIPS
Related concepts
RELATED CONCEPT
Ledger Messaging
Ledger messaging is the formal exchange of event notifications, posting commands, and audit state transitions between accounting engines, ledger databases, and external business systems.
RELATED CONCEPT
Reconciliation
Reconciliation is the automated or manual verification process of comparing two independent sets of financial records to verify accuracy, consistency, and completeness across institutional accounts.
AN INFORMED NEXT STEP
Establish clear operational parameters for Event Sourcing.
Start with your architecture, integration boundaries and operational requirements.