/**
 * Format a Sentry timestamp (in seconds) to ISO string.
 * Sentry timestamps are Unix timestamps in seconds, so we multiply by 1000 to convert to milliseconds.
 * Falls back to epoch (1970-01-01T00:00:00.000Z) if timestamp is missing/invalid.
 */
export declare function formatTimestamp(timestamp?: number): string;
/**
 * Get the duration in milliseconds between two Sentry timestamps.
 * Accepts timestamps in seconds (as numbers or strings).
 * Returns undefined if either timestamp is missing or invalid.
 */
export declare function getDuration(endTimestamp?: number | string, startTimestamp?: number | string): number | undefined;
/**
 * Map simple fields from source to data object.
 * Only sets fields if the source value is truthy.
 */
export declare function mapFields(source: any, data: Record<string, any>, fieldMappings: Record<string, string>): void;
/**
 * Map SDK name and version fields
 */
export declare function mapSdkFields(source: any, data: Record<string, any>): void;
/**
 * Map tags directly to data object
 */
export declare function mapTags(source: any, data: Record<string, any>): void;