                 /// Gwt payload from postback.
                 let payload: String = postback["payload"]?.string ?? "No payload provided by developer."
                 /// Set the response message text.
-                response = Messenger.standardMesssage(payload)
+                response = Messenger.standardMessage(payload)
             /// Check if the message object is empty.
             } else if message.isEmpty {
                 /// Set the response message text.
-                response = Messenger.standardMesssage("Webhook received unknown event.")
+                response = Messenger.standardMessage("Webhook received unknown event.")
             /// Check if the message text is empty
             } else if text.isEmpty {
                 /// Set the response message text.
-                response = Messenger.standardMesssage("I'm sorry but your message is empty 😢")
+                response = Messenger.standardMessage("I'm sorry but your message is empty 😢")
             /// The user wants to buy something.
             } else if text.lowercased().range(of: "sell") || text.lowercased().range(of: "buy") || text.lowercased().range(of: "shop") {
                 do {

            /// The message object and its text are not empty, and the user does not want to buy anything, so create a reversed message text.
            } else {
                /// Set the response message text.
                response = Messenger.standardMesssage(text.reversed(preserveFormat: true))
            }
            
            /// Creating the response JSON data bytes.

    ///
    /// - Parameter message: Message text to be sent.
    /// - Returns: Returns the created Node ready to be sent.
    static func standardMessage(_ message: String) -> Node {
        /// Create the Node.
        return [
            "text": message.makeNode()
