/**
 * LivenessUploader — thin wrapper around the HttpClient's uploadWithSession()
 * that adds:
 *   - Progress callbacks (onProgress)
 *   - Upload cancellation via AbortController
 *   - Automatic retry on transient network failure (configurable)
 *
 * Used internally by LivenessModule.create() and LivenessModule.submit() when
 * the caller needs progress reporting (e.g. for a progress bar during video
 * upload on slow connections).
 */
import { HttpClient } from "../../client/HttpClient";
export interface UploadOptions {
    /** Called with a value 0–1 as the upload progresses. */
    onProgress?: (fraction: number) => void;
    /** Optional AbortSignal to cancel the upload mid-flight. */
    signal?: AbortSignal;
    /** Override the default number of retries on transient errors. */
    retries?: number;
}
export declare class LivenessUploader {
    private http;
    constructor(http: HttpClient);
    /**
     * Upload a FormData payload to `path` with optional progress and
     * cancellation support.
     *
     * Falls back to the standard `uploadWithSession()` on browsers that do not
     * support XMLHttpRequest upload progress (very rare).
     */
    upload<T>(path: string, formData: FormData, options?: UploadOptions): Promise<T>;
    private uploadWithProgress;
}
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