/**
 * Metadata Utilities
 * Centralized metadata handling and sanitization functions
 */
/**
 * Sanitize metadata value for safe storage
 */
export declare function sanitizeMetadataValue(value: string | undefined | null): string;
/**
 * Create standardized metadata object
 */
export declare function createMetadata(data: Record<string, any>): Record<string, string>;
/**
 * Merge metadata objects safely
 */
export declare function mergeMetadata(...metadataObjects: (Record<string, string> | undefined)[]): Record<string, string>;
/**
 * Extract common metadata fields
 */
export declare function extractCommonMetadata(source: any): Record<string, string>;
/**
 * Create request metadata
 */
export declare function createRequestMetadata(requestId: string, additionalData?: Record<string, any>): Record<string, string>;