import { AppDb } from "./sqlite.connection";
/**
 * Saves a state to the database with the specified key.
 *
 * @param db - The application database instance.
 * @param key - The unique identifier for the state.
 * @param state - The state data to be saved as a string.
 * @returns A promise that resolves when the state has been saved.
 */
export declare const dbSaveState: (db: AppDb, key: string, state: string, expirationSec: number) => Promise<void>;