/**
 * Error which will be thrown if a timeout happens and no other
 * error is provided.
 */
export declare class TimeoutError extends Error {
    readonly name = "TimeoutError";
}
/**
 * Options for {@link withTimeout}.
 */
export interface WithTimeoutOptions<T> {
    block: Promise<T> | (() => Promise<T>);
    /**
     * If the timeout happens, generate the error which will be thrown.
     */
    onThrow?: () => Error;
    /**
     * If the timeout happens, generate a value which will be used
     * to resolve the promise instead of throwing an error.
     */
    onTimeout?: undefined | T | (() => T);
    /**
     * Maximum time to wait for the original promise to resolve before
     * giving up and forcing a resolution.
     */
    timeoutMS: number;
}
/**
 * Wrap a given block or promise in another promise which will
 * resolve or reject if the first has not resolved within the
 * specified time limit.
 */
export declare function withTimeout<T>(options: WithTimeoutOptions<T>): Promise<T>;
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