export declare class ValidationError extends Error {
    field?: string;
    constructor(message: string, field?: string);
}
export declare class ValidationUtils {
    static required(value: any, fieldName: string): void;
    static nonEmptyString(value: any, fieldName: string): string;
    static email(value: any, fieldName: string): string;
    static password(value: any, fieldName: string, minLength?: number): string;
    static positiveNumber(value: any, fieldName: string): number;
    static range(value: any, fieldName: string, min: number, max: number): number;
    static oneOf<T>(value: any, fieldName: string, allowedValues: T[]): T;
    static url(value: any, fieldName: string): string;
    static jwtToken(value: any, fieldName: string): string;
    static uuid(value: any, fieldName: string): string;
    static object(value: any, fieldName: string): object;
    static array(value: any, fieldName: string): any[];
    static function(value: any, fieldName: string): Function;
    static validateConfig(config: any, requiredFields: string[], fieldName?: string): void;
    static pattern(value: any, fieldName: string, regex: RegExp, message?: string): string;
    static date(value: any, fieldName: string): Date;
    static boolean(value: any, fieldName: string): boolean;
}