package main import ( "context" "log" "net" "google.golang.org/grpc" ) type server struct{} func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloResponse, error) { return &pb.HelloResponse{Message: "Hello " + in.GetName()}, nil } func main() { lis, err := net.Listen("tcp", ":8080") if err != nil { log.Fatalf("Failed to listen: %v", err) } s := grpc.NewServer() pb.RegisterGreeterServer(s, &server{}) if err := s.Serve(lis); err != nil { log.Fatalf("Failed to serve: %v", err) } }In this example, we define a `server` struct that implements the `pb.GreeterServer` interface generated by protobuf compiler. We then create a new `grpc.Server` instance and register our `server` implementation with it. Finally, we start the server by calling `s.Serve(lis)`. Overall, the `google.golang.org.grpc` package library provides a powerful and flexible implementation of the gRPC server in Go.