import { HttpStatusCode } from '../public-types/http-status.public-types';
export declare class ValidationError extends Error {
    readonly statusCode: HttpStatusCode;
    readonly details?: any;
    constructor(error: string, statusCode: HttpStatusCode, details?: Record<string, unknown>);
}
export declare function isValidId(id: unknown, maxLength?: number): boolean;
export declare function validateFieldSort(fieldSort: unknown): void;
export declare function validateQueryLimit(limit: unknown): void;
/**
 * All type names returned by 'typeof' supported by JavaScript:
 * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof}.
 * and a few other supported types.
 */
export type JavascriptTypeName = 'undefined' | 'object' | 'boolean' | 'number' | 'bigint' | 'string' | 'symbol' | 'function';
/** Returns true if 'typeof' of the 'value' is 'type' or 'type[]'. */
export declare function isRightType(value: unknown, type: JavascriptTypeName): boolean;
/** Returns true if 'obj' has only keys listed in the 'keys'. Object can't be an array. */
export declare function hasOnlyKeys(obj: object, keys: string[]): boolean;