import { Schema, Mongoose, Connection } from 'mongoose';
import { IMongoConfig, ILogger, ISystemNotify } from './definitions';
import { MemCacheConnections } from './cacheConnections';
export { Schema, FilterQuery, UpdateQuery, Document } from 'mongoose';
export declare const Mixed: typeof Schema.Types.Mixed;
export declare class MongoDB extends MemCacheConnections {
    logger: ILogger;
    config: IMongoConfig;
    systemNotify: ISystemNotify;
    reconnectAttempt: number;
    constructor({ connectionString, options, reconnectAttempt }: IMongoConfig, logger?: ILogger, systemNotify?: ISystemNotify);
    connect(): Promise<Mongoose>;
    createConnection(domain: string, currentAttempt?: number): Promise<Connection>;
    /**
     * Wait for connection to reach readyState === 1 (connected)
     */
    private waitForConnectionReady;
    /**
     * Clean up failed connection
     */
    private cleanupFailedConnection;
    /**
     * Determine if connection error should be retried
     */
    private shouldRetryConnection;
    /**
     * Calculate retry delay with exponential backoff
     * Returns: 2s, 4s, 6s, 8s, 10s
     */
    private calculateRetryDelay;
    private listen;
    private sendErrorToTelegram;
    close(): Promise<void>;
}