import { CountUnion, ErrorUnion } from '../outputs';
/**
 * Returns file downloaded prefix size from a given offset
 * @param {Object} params
 * @param {number} [params.fileId] - Identifier of the file
 * @param {number} [params.offset] - Offset from which downloaded prefix size should
 * be calculated
 * @param {Object} state
 * @returns {CountUnion | ErrorUnion}
 */
export declare type GetFileDownloadedPrefixSizeMethod = <ResponseT = CountUnion>(params: GetFileDownloadedPrefixSizeParams, state?: Record<string, any>) => Promise<ResponseT | ErrorUnion>;
export interface GetFileDownloadedPrefixSizeParams {
    /** Identifier of the file */
    fileId?: number;
    /** Offset from which downloaded prefix size should be calculated */
    offset?: number;
}