import { ClassConstructor } from 'class-transformer';
import { LogManager } from '../port/log/log.manager.port';
export declare class Guard {
    static logManager: LogManager;
    /**
     * Checks if value is empty. Accepts strings, numbers, booleans, objects and arrays.
     */
    static isEmpty(value: unknown): boolean;
    /**
     * Checks length range of a provided number/string/array
     */
    static lengthIsBetween(value: number | string | Array<unknown>, min: number, max: number): boolean;
    /**
     *
     * @param dto Data transfer object with class-validator decorators
     * @param obj Instance of the class
     * @returns boolean
     */
    static responseIsValid<T extends ClassConstructor<any>>(dto: T, obj: Object): Promise<boolean>;
    /**
     *
     * @param dto Data transfer object with class-validator decorators
     * @param response Array of objects to be validated
     * @returns Array of objects that are valid
     */
    static filterValidResponses(dto: any, response: any): Promise<any[]>;
}
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