Event Sourcing models every change in the state of an application as an event object. The events are recorded in an append-only store. Application generates a series of events that capture the change that it has applied on data and these events are durably stored in sequence they were applied. The state itself is not saved in events, but it can be reconstructed by replaying the events.
The events are persisted in an event store that acts as the source of truth or system of record (the authoritative data source for a given data element or piece of information) about the current state of the data. The event store typically publishes these events so that consumers can be notified and can handle them if needed. Consumers could, for example, ...
