import { MqttPersistence } from "../basicPersistence.ts";
import type sqlite from "node:sqlite";
export declare class SqlitePersistence extends MqttPersistence {
    private storageInstance;
    constructor(db?: string | sqlite.DatabaseSync);
    /**
     * Convenient lifecycle method combining instance creation and initialization.
     */
    static start(db?: string | sqlite.DatabaseSync): Promise<SqlitePersistence>;
    /**
     * Overrides close to make sure the underlying database file
     * handle is cleaned up correctly when the persistence is halted.
     */
    close(): Promise<void>;
}
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