/**
 * Utility functions for span extraction without UnifiedHttpContext
 * Internal utilities for span extraction functionality
 */
import type { UnifiedHttpContext } from '@inh-lib/unified-route';
import type { UnifiedTelemetryProvider, UnifiedTelemetrySpan } from '@inh-lib/unified-telemetry-core';
import type { InternalTelemetryMiddlewareConfig } from '../types/middleware.types';
import type { ExtractSpanOptions, FallbackSpanOptions, SpanExtractionSource } from '../types/span-extraction.types';
/**
 * Try to get active span from provider's tracer
 */
export declare function tryGetActiveSpanFromProvider(provider: UnifiedTelemetryProvider): UnifiedTelemetrySpan | null;
/**
 * Extract span from headers using trace context
 */
export declare function extractSpanFromHeaders(headers: Record<string, string>, provider: UnifiedTelemetryProvider, config: InternalTelemetryMiddlewareConfig, options?: ExtractSpanOptions): UnifiedTelemetrySpan | null;
/**
 * Create fallback span when no active span or extraction fails
 */
export declare function createFallbackSpan(provider: UnifiedTelemetryProvider, config: InternalTelemetryMiddlewareConfig, options?: FallbackSpanOptions): UnifiedTelemetrySpan;
/**
 * Create minimal UnifiedHttpContext from headers for extraction
 */
export declare function createMinimalContextFromHeaders(headers: Record<string, string>): Partial<UnifiedHttpContext>;
/**
 * Determine span extraction source
 */
export declare function getSpanExtractionSource(hasActiveSpan: boolean, hasValidHeaders: boolean, createNewAllowed: boolean): SpanExtractionSource;
/**
 * Check if headers contain valid trace context
 */
export declare function hasValidTraceHeaders(headers: Record<string, string>): boolean;