import { CanActivate, ExecutionContext } from '@nestjs/common';
import { Reflector } from '@nestjs/core';
export declare const SUPPORTED_REGIONS: readonly ["CN", "US", "UAE"];
export type Region = typeof SUPPORTED_REGIONS[number];
export declare const REGION_HEADER = "x-region-id";
export declare const SKIP_REGION_CHECK = "skipRegionCheck";
export declare class RegionGuard implements CanActivate {
    private reflector;
    constructor(reflector: Reflector);
    canActivate(context: ExecutionContext): boolean;
    private getRequestedRegion;
    private isValidRegion;
    private canAccessRegion;
}
export declare const SkipRegionCheck: () => import("@nestjs/common").CustomDecorator<string>;