some changes with data field, and fix smth

internal/server/rpc/responsers.go

@@ -1,39 +1,58 @@
 package rpc
 
-import "encoding/json"
+import (
+	"crypto/md5"
+	"encoding/json"
+	"fmt"
+
+	"github.com/akyaiy/GoSally-mvp/internal/core/corestate"
+	"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 GetData(data any) *RPCData {
+	return &RPCData{
+		Salt:            generateSalt(),
+		ResponsibleNode: corestate.NODE_UUID,
+		Checksum:        generateChecksum(data),
+	}
+}
 
 func NewError(code int, message string, data any, id *json.RawMessage) *RPCResponse {
-	if data != nil {
-		return &RPCResponse{
-			JSONRPC: JSONRPCVersion,
-			ID:      id,
-			Error: map[string]any{
-				"code":    code,
-				"message": message,
-				"data":    data,
-			},
-		}
+	Error := make(map[string]any)
+	Error = map[string]any{
+		"code":    code,
+		"message": message,
+		"data":    data,
 	}
+
 	return &RPCResponse{
 		JSONRPC: JSONRPCVersion,
 		ID:      id,
-		Error: map[string]any{
-			"code":    code,
-			"message": message,
-		},
+		Error:   Error,
+		Data:    GetData(Error),
 	}
 }
 
 func NewResponse(result any, id *json.RawMessage) *RPCResponse {
-	if result == nil {
-		return &RPCResponse{
-			JSONRPC: JSONRPCVersion,
-			ID:      id,
-		}
-	}
 	return &RPCResponse{
 		JSONRPC: JSONRPCVersion,
 		ID:      id,
-		Result:  result,
+		Result: result,
+		Data: GetData(result),
 	}
 }