import { GatewayConfig, ServiceEndpointDefinition } from '@apollo/gateway';
import { GraphQLDataSource } from '@apollo/gateway/dist/datasources/types';
import { Type } from '@nestjs/common';
import { ModuleMetadata } from '@nestjs/common/interfaces';
import { GqlModuleOptions } from './gql-module-options.interface';
export interface GatewayModuleOptions {
    gateway?: GatewayConfig;
    server?: Omit<GqlModuleOptions, 'typeDefs' | 'typePaths' | 'include' | 'resolvers' | 'resolverValidationOptions' | 'directiveResolvers' | 'autoSchemaFile' | 'transformSchema' | 'definitions' | 'schema' | 'subscriptions' | 'schemaDirectives' | 'buildSchemaOptions' | 'fieldResolverEnhancers'>;
}
export interface GatewayOptionsFactory {
    createGatewayOptions(): Promise<GatewayModuleOptions> | GatewayModuleOptions;
}
export interface GatewayModuleAsyncOptions extends Pick<ModuleMetadata, 'imports'> {
    useExisting?: Type<GatewayOptionsFactory>;
    useClass?: Type<GatewayOptionsFactory>;
    useFactory?: (...args: any[]) => Promise<GatewayModuleOptions> | GatewayModuleOptions;
    inject?: any[];
}
export declare type GatewayBuildService = (definition: ServiceEndpointDefinition) => GraphQLDataSource;