import { z } from 'zod';
/**
 * Error indicating violations of field-level constraints
 */
export declare class ValidationError {
    readonly message: string;
    constructor(message: string);
}
/**
 * Validate the given data with the given zod schema (for field-level constraints)
 */
export declare function validate(validator: z.ZodType, data: unknown): void;
/**
 * Check if the given object has all the given fields, not null or undefined
 * @param obj
 * @param fields
 * @returns
 */
export declare function hasAllFields(obj: any, fields: string[]): boolean;
/**
 * Check if the given objects have equal values for the given fields. Returns
 * false if either object is nullish or is not an object.
 */
export declare function allFieldsEqual(obj1: any, obj2: any, fields: string[]): boolean;