import IBackend from '../contracts/IBackend';
import ISessionBackend from '../contracts/ISessionBackend';
import IClientContext from '../contracts/IClientContext';
import { OpenSessionRequest } from '../contracts/IDBSQLClient';
interface ThriftBackendOptions {
    context: IClientContext;
    onConnectionEvent: (event: 'error' | 'reconnecting' | 'close' | 'timeout', payload?: unknown) => void;
}
export default class ThriftBackend implements IBackend {
    private readonly context;
    private readonly onConnectionEvent;
    constructor({ context, onConnectionEvent }: ThriftBackendOptions);
    connect(): Promise<void>;
    openSession(request: OpenSessionRequest): Promise<ISessionBackend>;
    close(): Promise<void>;
}
export {};