some changes with data field, and fix smth

internal/server/rpc/writers.go

@@ -1,40 +1,11 @@
 package rpc
 
 import (
-	"crypto/md5"
 	"encoding/json"
-	"fmt"
 	"net/http"
-
-	"github.com/google/uuid"
 )
 
-func generateChecksum(result any) string {
-	if result == nil {
-		return ""
-	}
-	data, err := json.Marshal(result)
-	if err != nil {
-		return ""
-	}
-	return fmt.Sprintf("%x", md5.Sum(data))
-}
-
-func generateSalt() string {
-	return uuid.NewString()
-}
-
-func write(nid string, w http.ResponseWriter, msg *RPCResponse) error {
-	msg.Salt = generateSalt()
-	if msg.Result != nil {
-		msg.Checksum = generateChecksum(msg.Result)
-	} else if msg.Error != nil {
-		msg.Checksum = generateChecksum(msg.Error)
-	}
-
-	if nid != "" {
-		msg.ResponsibleNode = nid
-	}
+func write(w http.ResponseWriter, msg *RPCResponse) error {
 	data, err := json.Marshal(msg)
 	if err != nil {
 		return err
@@ -43,10 +14,10 @@ func write(nid string, w http.ResponseWriter, msg *RPCResponse) error {
 	return err
 }
 
-func WriteError(nid string, w http.ResponseWriter, errm *RPCResponse) error {
-	return write(nid, w, errm)
+func WriteError(w http.ResponseWriter, errm *RPCResponse) error {
+	return write(w, errm)
 }
 
-func WriteResponse(nid string, w http.ResponseWriter, response *RPCResponse) error {
-	return write(nid, w, response)
+func WriteResponse(w http.ResponseWriter, response *RPCResponse) error {
+	return write(w, response)
 }