import { Observable } from "rxjs";
import { NostrEvent } from "../helpers/event.js";
import { IExpirationManager } from "./interface.js";
/** Manages expiration state for events with expiration tags */
export declare class ExpirationManager implements IExpirationManager {
    /** A stream of event IDs that have expired */
    readonly expired$: Observable<string>;
    /** Internal subject for expired$ observable */
    private expiredSubject;
    /** Maps event ID to expiration timestamp */
    private expirations;
    /** Current timeout for the next expiration check */
    private timer;
    /** Timestamp of the next expiration check */
    private nextCheck;
    constructor();
    /**
     * Add an event to the expiration manager if it has an expiration tag
     * @param event The event to track for expiration
     */
    track(event: NostrEvent): void;
    /**
     * Remove an event from expiration tracking
     * @param eventId The ID of the event to remove
     */
    forget(eventId: string): void;
    /**
     * Check if an event is expired
     * @param event The event to check
     * @returns true if the event has expired, false otherwise
     */
    check(event: NostrEvent): boolean;
    /**
     * Tears down the manager: cancels any pending timer and completes the expired$ stream
     * @note This is a terminal operation; the manager should be discarded after calling it.
     */
    dispose(): void;
    /** Allows the manager to be used with the `using` keyword */
    [Symbol.dispose](): void;
    /**
     * Remove expired events from the store and emit them
     */
    private emitNotifications;
}