/**
 * Upload Utility Functions
 */
import type { UploadProgressEvent, UploadState } from '@plyaz/types/api';
/**
 * Resolve URL with baseURL if provided
 */
export declare function resolveUrl(url: string, baseURL?: string): string;
/**
 * Convert data to Buffer (Node.js) or ensure it's usable
 */
export declare function normalizeData(data: Buffer | Blob | ArrayBuffer | Uint8Array): Buffer | Uint8Array;
/**
 * Create initial upload state
 */
export declare function createUploadState(totalSize: number): UploadState;
/**
 * Calculate progress metrics
 */
export declare function calculateProgress(state: UploadState): UploadProgressEvent;
/**
 * Emit final progress event
 */
export declare function emitFinalProgress(onProgress: ((event: UploadProgressEvent) => void) | undefined, totalSize: number, startTime: number): void;
/**
 * Check if progress should be emitted based on throttling
 */
export declare function shouldEmitProgress(state: UploadState, totalSize: number, throttleMs: number): boolean;
/**
 * Parse response headers from Node.js response
 */
export declare function parseNodeHeaders(headers: Record<string, string | string[] | undefined>): Record<string, string>;
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