/**
 * @module memoryStore
 */
import type { PacketId } from "./deps.ts";
import type { PacketStore, PendingAckOutgoing, pendingIncoming, PendingOutgoing, PendingOutgoingPackets, Store } from "./store.ts";
/**
 * In-memory implementation of the Store interface for managing MQTT packet storage
 */
export declare class MemoryStore implements Store {
    /** Current packet ID counter */
    private packetId;
    /** Map of pending incoming packets */
    pendingIncoming: PacketStore<pendingIncoming>;
    /** Map of pending outgoing packets */
    pendingOutgoing: PacketStore<PendingOutgoing>;
    /** Map of pending acknowledgment outgoing packets */
    pendingAckOutgoing: PacketStore<PendingAckOutgoing>;
    /**
     * Creates a new MemoryStore instance
     */
    constructor();
    /**
     * Generates the next available packet ID
     * @returns {PacketId} The next available packet ID
     * @throws {Error} If no unused packet ID is available
     */
    nextId(): PacketId;
    /**
     * Asynchronously yields all pending outgoing packets
     * @yields {PendingOutgoingPackets} Pending outgoing packets
     */
    pendingOutgoingPackets(): AsyncGenerator<PendingOutgoingPackets, void, unknown>;
}
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