diff --git a/config.go b/config.go
index d0abdef..996f49e 100644
--- a/config.go
+++ b/config.go
@@ -2,6 +2,7 @@ package elasticsearch
 
 import "github.com/Selly-Modules/natsio"
 
+// Config int client elasticsearch
 type Config struct {
 	ApiKey string
 	Nats   natsio.Config
diff --git a/constants.go b/constants.go
index 9dc6c8f..f3018b0 100644
--- a/constants.go
+++ b/constants.go
@@ -1,5 +1,5 @@
 package elasticsearch
 
-const SubjectSyncData = "sync_data"
-const SubjectSearch = "search"
-const SubjectUpdateDocument = "update_document"
+const SubjectSyncData = "elasticsearch_sync_data"
+const SubjectSearch = "elasticsearch_search"
+const SubjectUpdateDocument = "elasticsearch_update_document"
diff --git a/elasticsearch.go b/elasticsearch.go
index f0dbcee..eb32160 100644
--- a/elasticsearch.go
+++ b/elasticsearch.go
@@ -8,12 +8,15 @@ import (
 	"github.com/Selly-Modules/natsio"
 )
 
+// Client ...
 type Client struct {
 	Config        Config
 	natsServer    natsio.Server
 	natsJetStream natsio.JetStream
 }
 
+// NewClient
+// Init client elasticsearch
 func NewClient(config Config) (*Client, error) {
 	if config.ApiKey == "" {
 		return nil, errors.New("api key is required")
@@ -34,6 +37,8 @@ func NewClient(config Config) (*Client, error) {
 	return c, nil
 }
 
+// SyncData
+// Sync data to services ES
 func (c *Client) SyncData(data SyncData) (bool, error) {
 	var (
 		res Response
@@ -51,6 +56,8 @@ func (c *Client) SyncData(data SyncData) (bool, error) {
 	return res.Success, nil
 }
 
+// Search
+// Request search to service es
 func (c *Client) Search(query ESQuery) ([]string, error) {
 	var (
 		res Response
@@ -68,6 +75,8 @@ func (c *Client) Search(query ESQuery) ([]string, error) {
 	return res.Data, nil
 }
 
+// UpdateDocument
+// Insert or update document to ES
 func (c *Client) UpdateDocument(query UpdateDataPayload) ([]string, error) {
 	var (
 		res Response
diff --git a/struct.go b/struct.go
index 05ec9e1..38a0519 100644
--- a/struct.go
+++ b/struct.go
@@ -2,6 +2,8 @@ package elasticsearch
 
 import "time"
 
+// Response
+// response to service es
 type Response struct {
 	Success bool     `json:"success"`
 	Data    []string `json:"data,omitempty"`
@@ -11,16 +13,22 @@ type Response struct {
 	Message string   `json:"message"`
 }
 
+// SyncData
+// Payload for sync data to service es
 type SyncData struct {
 	Index string
 	Data  []byte
 }
 
+// UpdateDataPayload
+// Payload for insert or update document
 type UpdateDataPayload struct {
 	Index string
 	Body  []byte
 }
 
+// ESQuery
+// Query support to search document
 type ESQuery struct {
 	Index                 string // Index
 	Page                  int64
@@ -73,7 +81,11 @@ type ESQuery struct {
 	Segments              []string
 }
 
+// ESSort
+// ES sort with field
+// ... filed is sort
+// ... ascending [true is asc] [false is desc]
 type ESSort struct {
-	Filed     string // Filed sort
+	Field     string // Filed sort
 	Ascending bool
 }