Right way of parsing webhook update JSON string to golang struct?

[Kamil]

I parse incoming webhook update JSON with this piece of code:

func ParseTelegramWebhookUpdate(body string) (tgbotapi.Update, error) {
	var messageFromBody tgbotapi.Update
        
        // aws encodes body with base64
 	rawDecodedText, err := base64.StdEncoding.DecodeString(body)
	if err != nil {
		return messageFromBody, fmt.Errorf("failed to parse base64 body from request payload %s", err)
	}

	if string(rawDecodedText) == "" {
		return messageFromBody, fmt.Errorf("empty body from request payload %s", err)
	}

	err = json.NewDecoder(bytes.NewReader(rawDecodedText)).Decode(&messageFromBody)
	if err != nil {
		return messageFromBody, fmt.Errorf("failed to parse webhook update json body from request payload %s", err)
	}

	return messageFromBody, nil
}

however it sometimes fails with Null dereference errors:

here is what I receive for a json

{"update_id":1234443258,
"edited_message":
{
    "message_id": 684,
    "from": {
        "id": 123,
        "is_bot": false,
        "first_name": "x",
        "last_name": "x",
        "username": "x",
        "language_code": "en"
    },
    "chat": {
        "id": 123,
        "first_name": "x",
        "last_name": "x",
        "username": "x",
        "type": "private"
    },
    "date": 1682768401,
    "edit_date": 1682776196,
    "text": "/ask come up with 5 ideas on telegram bot",
    "entities": [
        {
            "offset": 0,
            "length": 4,
            "type": "bot_command"
        }
    ]
}
}

if my code is not completely correct what is the right way of doing parsing update json to golang struct?

[Kamil]

figured it out:

	if !update.Message.IsCommand() {
		fmt.Printf("message text is empty or not a command: %s", update.Message.Text)
		return
	}

this won't work with any other message like edited_message, it makes sense of course, silly me 😄

will close the thread