update readme

README.md

@@ -11,6 +11,7 @@ Read full [documentation](https://docs.ozon.ru/api/seller/en/#tag/Introduction)
 You can check [list of supported endpoints](ENDPOINTS.md)
 
 ## How to start
+### API
 Get Client-Id and Api-Key in your seller profile [here](https://seller.ozon.ru/app/settings/api-keys?locale=en)
 
 Just add dependency to your project and you're ready to go.
@@ -49,6 +50,44 @@ func main() {
 }
 ```
 
+### Notifications
+Ozon can send push-notifications to your REST server. There is an implementation of REST server that handles notifications in this library.
+
+[Official documentation](https://docs.ozon.ru/api/seller/en/#tag/push_intro)
+
+How to use:
+```Golang
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/diphantxm/ozon-api-client/ozon"
+)
+
+func main() {
+	// Create server
+	port := 5000
+	server := ozon.NewNotificationServer(port)
+
+	// Register handlers passing message type and handler itself
+	server.Register(ozon.ChatClosedType, func(req interface{}) error {
+		notification := req.(*ozon.ChatClosed)
+
+		// Do something with the notification here...
+		log.Printf("chat %s has been closed\n", notification.ChatId)
+
+		return nil
+	})
+
+	// Run server
+	if err := server.Run(); err != nil {
+		log.Printf("error while running notification server: %s", err)
+	}
+}
+```
+
 ## Contribution
 If you need some endpoints ASAP, create an issue and list all the endpoints. I will add them to library soon.
 

ozon/notifications/server.go

@@ -67,7 +67,7 @@ func (ns *NotificationServer) handler(rw http.ResponseWriter, httpReq *http.Requ
 		//ns.error(rw, http.StatusInternalServerError, err)
 		return
 	}
-	h, _ := ns.handlers[mt.MessageType]
+	h := ns.handlers[mt.MessageType]
 	if err := h(req); err != nil {
 		ns.result(rw, false)
 		//ns.error(rw, http.StatusInternalServerError, err)