/**
 * (c) 2021, Micro:bit Educational Foundation and contributors
 *
 * SPDX-License-Identifier: MIT
 */
import { DeviceError } from "./device.js";
export declare class TimeoutError extends DeviceError {
    constructor(message?: string);
}
export declare class DisconnectError extends Error {
    constructor(message?: string);
}
/**
 * Utility to time out an action after a delay.
 *
 * The action cannot be cancelled; it may still proceed after the timeout.
 */
export declare function withTimeout<T>(actionPromise: Promise<T>, timeout: number): Promise<T>;
export declare function delay(millis: number): Promise<unknown>;
export declare function timeoutErrorAfter<T>(millis: number, message?: string): Promise<T>;
export declare function disconnectErrorCallback<T>(message?: string): {
    promise: Promise<T>;
    callback: () => void | undefined;
};