import type { ZipProgressEvent, ZipProgressOptions } from '../types.js';
export interface ProgressTracker {
    update(bytesInDelta: number, bytesOutDelta: number): void;
    flush(): void;
}
export declare function createProgressTracker(options: ZipProgressOptions | undefined, base: Omit<ZipProgressEvent, 'bytesIn' | 'bytesOut'>): ProgressTracker | null;
export declare function createProgressTransform(tracker: ProgressTracker | null): TransformStream<Uint8Array, Uint8Array>;
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