import { HttpService } from "@nestjs/axios";
export interface GrpcRequestType {
    query: string;
    variables?: Record<string, any> | null | undefined;
    hostname: string;
}
export declare class PHXGrpcBackgroundService {
    private readonly httpService;
    private readonly grpcGatewayUrl;
    private readonly projectSource;
    constructor(httpService: HttpService);
    query({ query, variables, hostname }: GrpcRequestType): Promise<any>;
    mutation({ query, variables, hostname }: GrpcRequestType): Promise<any>;
}