/**
 * Connects to the centralized MongoDB database
 * Uses connection pooling and retry logic for optimal performance
 * This connects to the package owner's database - users don't need to provide MongoDB URI
 *
 * @returns Promise that resolves when connection is established
 * @throws Error if connection fails after retries
 */
export declare function connectDB(): Promise<void>;
/**
 * Disconnects from MongoDB gracefully
 * @returns Promise that resolves when disconnected
 */
export declare function disconnectDB(): Promise<void>;
/**
 * Gets the current MongoDB connection status
 * @returns Connection state: 0 = disconnected, 1 = connected, 2 = connecting, 3 = disconnecting
 */
export declare function getConnectionStatus(): number;
/**
 * Checks if MongoDB is connected
 * @returns True if connected, false otherwise
 */
export declare function isConnected(): boolean;
/**
 * Wait for connection to be ready
 * Useful for ensuring connection before operations
 * @param timeoutMs - Maximum time to wait in milliseconds (default: 5000)
 * @returns Promise that resolves when connected, rejects on timeout
 */
export declare function waitForConnection(timeoutMs?: number): Promise<void>;