import type { CommittedEvent, Messages, ProjectionResults, ProjectorFactory, State } from "../types";
/**
 * Projects events (materialized view).
 * - Projectors reduce events by returning state patches. A patch with an empty record `{id}` represents a `delete` operation.
 * - Handles event batches (starting from the subscription watermark), reducing patches in a projection map before the final commit.
 * - The cardinality of the projection is driven by the input stream (can map one or many aggregates in one record).
 * - The map can contain record-level patches (by id) and filtered patches (updates and deletes).
 * - Commits are executed in the following order:
 *    - Filtered deletes
 *    - Filtered updates
 *    - Record level patches
 *
 * @param factory the projector factory
 * @param events the committed events to project
 * @returns projection results
 */
export default function project<S extends State, E extends Messages>(factory: ProjectorFactory<S, E>, events: CommittedEvent<E>[]): Promise<ProjectionResults>;
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