import { CanActivate, ExecutionContext } from '@nestjs/common';
import { Reflector } from '@nestjs/core';
import { TenantContextService } from '../services';
/**
 * Metadata key for requiring tenant
 */
export declare const REQUIRE_TENANT_KEY = "requireTenant";
/**
 * Guard that ensures a valid tenant context exists for the request.
 * Works with REST controllers, GraphQL resolvers, WebSocket gateways, and microservice handlers.
 * Use with @RequireTenant() decorator on controllers, resolvers, gateways, handlers, or methods.
 *
 * @example REST Controller
 * ```typescript
 * @Controller('users')
 * @UseGuards(TenantGuard)
 * @RequireTenant()
 * export class UsersController {}
 * ```
 *
 * @example GraphQL Resolver
 * ```typescript
 * @Resolver(() => User)
 * @UseGuards(TenantGuard)
 * @RequireTenant()
 * export class UsersResolver {}
 * ```
 *
 * @example WebSocket Gateway
 * ```typescript
 * @WebSocketGateway()
 * @UseGuards(TenantGuard)
 * @RequireTenant()
 * export class ChatGateway {}
 * ```
 *
 * @example Microservice Controller
 * ```typescript
 * @Controller()
 * @UseGuards(TenantGuard)
 * @RequireTenant()
 * export class UsersHandler {}
 * ```
 */
export declare class TenantGuard implements CanActivate {
    private readonly reflector;
    private readonly tenantContext;
    constructor(reflector: Reflector, tenantContext: TenantContextService);
    canActivate(context: ExecutionContext): boolean;
}
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