[Service] Rename the ServiceId proto to Service (#150)

Renamed the `ServiceId` proto to `Service` so `ServiceId.Id` is more semantic and less confusing.
---

Co-authored-by: Bryan White <[email protected]>
Co-authored-by: Daniel Olshansky <[email protected]>
Co-authored-by: Dima Kniazev <[email protected]>

pkg/client/gomock_reflect_3526400147/prog.go

@@ -0,0 +1,68 @@
+
+package main
+
+import (
+	"encoding/gob"
+	"flag"
+	"fmt"
+	"os"
+	"path"
+	"reflect"
+
+	"github.com/golang/mock/mockgen/model"
+
+	pkg_ "github.com/pokt-network/poktroll/pkg/client"
+)
+
+var output = flag.String("output", "", "The output file name, or empty to use stdout.")
+
+func main() {
+	flag.Parse()
+
+	its := []struct{
+		sym string
+		typ reflect.Type
+	}{
+
+		{ "TxContext", reflect.TypeOf((*pkg_.TxContext)(nil)).Elem()},
+
+		{ "TxClient", reflect.TypeOf((*pkg_.TxClient)(nil)).Elem()},
+
+	}
+	pkg := &model.Package{
+		// NOTE: This behaves contrary to documented behaviour if the
+		// package name is not the final component of the import path.
+		// The reflect package doesn't expose the package name, though.
+		Name: path.Base("github.com/pokt-network/poktroll/pkg/client"),
+	}
+
+	for _, it := range its {
+		intf, err := model.InterfaceFromInterfaceType(it.typ)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Reflection: %v\n", err)
+			os.Exit(1)
+		}
+		intf.Name = it.sym
+		pkg.Interfaces = append(pkg.Interfaces, intf)
+	}
+
+	outfile := os.Stdout
+	if len(*output) != 0 {
+		var err error
+		outfile, err = os.Create(*output)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "failed to open output file %q", *output)
+		}
+		defer func() {
+			if err := outfile.Close(); err != nil {
+				fmt.Fprintf(os.Stderr, "failed to close output file %q", *output)
+				os.Exit(1)
+			}
+		}()
+	}
+
+	if err := gob.NewEncoder(outfile).Encode(pkg); err != nil {
+		fmt.Fprintf(os.Stderr, "gob encode: %v\n", err)
+		os.Exit(1)
+	}
+}