/**
 * Internal helpers shared across concurrency implementations.
 *
 * @internal
 */
import { TaskWorkerError } from './errors';
import type { TaskWorkerErrorCode, WorkerTaskHandler } from './types';
/** @internal */
export interface SerializedWorkerError {
    /** Untrusted serialized worker payload; validate against TaskWorkerErrorCode before use. */
    code?: string;
    message?: string;
    name?: string;
    stack?: string;
}
/** @internal */
export declare const isTaskWorkerErrorCode: (code: string | undefined) => code is TaskWorkerErrorCode;
/** @internal */
export declare const normalizeTimeout: (timeout?: number) => number | undefined;
/** @internal */
export declare const validateTaskHandler: <TInput, TResult>(handler: WorkerTaskHandler<TInput, TResult>) => string;
/** @internal */
export declare const createWorkerInstance: (scriptSource: string, name?: string) => Worker;
/** @internal */
export declare const restoreWorkerError: (payload: SerializedWorkerError | undefined) => TaskWorkerError;
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