import { ValidationArguments, ValidationOptions, ValidatorConstraintInterface } from 'class-validator';
import { ChannelsService } from '../services/channels.service';
import { DevicesService } from '../services/devices.service';
export declare class ChannelExistsConstraintValidator implements ValidatorConstraintInterface {
    private readonly devicesService;
    private readonly channelsService;
    constructor(devicesService: DevicesService, channelsService: ChannelsService);
    validate(channelId: string | undefined, args: ValidationArguments): Promise<boolean>;
    defaultMessage(args: ValidationArguments): string;
}
export declare const ValidateChannelExists: (validationOptions?: ValidationOptions) => (object: object, propertyName: string) => void;