// gRPC
 package main

 import (
     "log"

     pb "github.com/chenhaonan-eth/dao/proto/server"
     "golang.org/x/net/context"
     "google.golang.org/grpc"
     "google.golang.org/grpc/credentials/insecure"
 )

 func main() {
     conn, err := grpc.Dial(":50052", grpc.WithTransportCredentials(insecure.NewCredentials()))
     if err != nil {
         log.Fatal(err)
     }
     defer conn.Close()
     c := pb.NewGreeterClient(conn)
     context := context.Background()
     body := &pb.FturesFoewignRequest{
         Symbol: "CAD",
     }

     r, err := c.GetFuturesForeignHist(context, body)
     if err != nil {
         log.Println(err)
     }
     log.Println(r.Results)
 }