import Database from 'better-sqlite3';
import { IStorageAdapter } from '../types';
import type { WAMessage, Contact } from '@whiskeysockets/baileys';
/**
 * SQLite storage adapter for session data
 */
export declare class SQLiteStorageAdapter implements IStorageAdapter {
    private db;
    private dbPath;
    constructor(baseDir?: string);
    init(): Promise<void>;
    saveSession(sessionId: string, creds: any): Promise<void>;
    loadSession(sessionId: string): Promise<any | null>;
    deleteSession(sessionId: string): Promise<void>;
    hasSession(sessionId: string): Promise<boolean>;
    saveMessage(sessionId: string, message: WAMessage): Promise<void>;
    getMessages(sessionId: string, jid: string, limit?: number): Promise<WAMessage[]>;
    saveContact(sessionId: string, contact: Contact): Promise<void>;
    getContacts(sessionId: string): Promise<Contact[]>;
    saveChat(sessionId: string, chat: any): Promise<void>;
    getChats(sessionId: string): Promise<any[]>;
    close(): Promise<void>;
    listSessions(): Promise<string[]>;
    /**
     * Ensure session record exists before saving related data
     */
    private ensureSessionExists;
    /**
     * Get database instance for advanced usage
     */
    getDatabase(): Database.Database;
}
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