import type { IObserver } from './IObserver.ts';
import type { IObservable } from './IObservable.ts';
import type { IEventStorageReader } from './IEventStorageReader.ts';
import type { IEvent } from './IEvent.ts';
export interface IProjection<TView> extends IObserver {
    readonly view: TView;
    /** Subscribe to new events */
    subscribe(eventStore: IObservable): void;
    /** Restore view state from not-yet-projected events */
    restore(eventStore: IEventStorageReader): Promise<void> | void;
    /** Project new event */
    project(event: IEvent, meta?: Record<string, any>): Promise<void> | void;
}
export interface IProjectionConstructor {
    new (c?: any): IProjection<any>;
    readonly handles?: string[];
}