import { SupabaseClient } from '@supabase/supabase-js';
/**
 * Connection Health Utility
 * Validates database connectivity with timeout
 */
export declare class ConnectionHealthUtil {
    /**
     * Checks if Supabase connection is healthy
     * @param client - Supabase client to test
     * @param timeoutMs - Timeout in milliseconds (default: 5000)
     * @returns true if connection is healthy, false otherwise
     */
    static isHealthy(client: SupabaseClient, timeoutMs?: number): Promise<boolean>;
    /**
     * Waits for connection to become healthy
     * @param client - Supabase client to test
     * @param maxRetries - Maximum number of retries (default: 3)
     * @param retryDelayMs - Delay between retries in milliseconds (default: 1000)
     * @returns true if connection became healthy, false otherwise
     */
    static waitForHealthy(client: SupabaseClient, maxRetries?: number, retryDelayMs?: number): Promise<boolean>;
}
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