/**
 * Business logic for span extraction strategies
 * Internal logic for executing span extraction with fallback strategies
 */
import type { UnifiedTelemetryProvider, UnifiedTelemetrySpan, UnifiedTelemetryLogger, UnifiedTelemetrySpanMetadata } from '@inh-lib/unified-telemetry-core';
import type { InternalTelemetryMiddlewareConfig } from '../types/middleware.types';
import type { SpanExtractionResult, GetActiveSpanOptions } from '../types/span-extraction.types';
/**
 * Execute span extraction strategy with fallbacks
 * Strategy: Active Span → Extract from Headers → Create Fallback
 */
export declare function executeSpanExtractionStrategy(headers: Record<string, string> | undefined, provider: UnifiedTelemetryProvider, config: InternalTelemetryMiddlewareConfig, fallbackOptions?: GetActiveSpanOptions): SpanExtractionResult | null;
/**
 * Create child span without UnifiedHttpContext using parent span or headers
 */
export declare function createChildSpanWithoutContext(parentSpanOrHeaders: UnifiedTelemetrySpanMetadata | {
    headers: Record<string, string>;
}, operationName: string, provider: UnifiedTelemetryProvider, config: InternalTelemetryMiddlewareConfig, options?: {
    operationType?: string;
    layer?: string;
    attributes?: Record<string, string | number | boolean>;
}): {
    span: UnifiedTelemetrySpan;
    logger: UnifiedTelemetryLogger;
    finish: () => void;
};