/**
 * Utility for building observability configs from environment variables
 */
import type { ObservabilityConfig } from "../types/index.js";
/**
 * Build observability config from environment variables
 *
 * Reads Langfuse configuration from environment:
 * - LANGFUSE_ENABLED: Enable/disable Langfuse (must be "true")
 * - LANGFUSE_PUBLIC_KEY: Your Langfuse public key (required)
 * - LANGFUSE_SECRET_KEY: Your Langfuse secret key (required)
 * - LANGFUSE_BASE_URL: Langfuse server URL (default: https://cloud.langfuse.com)
 * - LANGFUSE_ENVIRONMENT: Environment name (default: dev)
 * - PUBLIC_APP_VERSION: Release/version identifier (default: v1.0.0)
 *
 * @returns ObservabilityConfig if all required env vars are set, undefined otherwise
 *
 * @example
 * ```typescript
 * import { NeuroLink, buildObservabilityConfigFromEnv } from '@juspay/neurolink';
 *
 * const neurolink = new NeuroLink({
 *   observability: buildObservabilityConfigFromEnv()
 * });
 * ```
 */
export declare function buildObservabilityConfigFromEnv(): ObservabilityConfig | undefined;