content: add protect params

options.go

@@ -74,6 +74,9 @@ type SendOptions struct {
 
 	// AllowWithoutReply allows sending messages not a as reply if the replied-to message has already been deleted.
 	AllowWithoutReply bool
+
+	// Protects the contents of the sent message from forwarding and saving
+	Protected bool
 }
 
 func (og *SendOptions) copy() *SendOptions {

telebot.go

@@ -182,6 +182,7 @@ const (
 	EntityCode          EntityType = "code"
 	EntityCodeBlock     EntityType = "pre"
 	EntityTextLink      EntityType = "text_link"
+	EntitySpoiler       EntityType = "spoiler"
 )
 
 // ChatType represents one of the possible chat types.

util.go

@@ -220,6 +220,10 @@ func (b *Bot) embedSendOptions(params map[string]string, opt *SendOptions) {
 		replyMarkup, _ := json.Marshal(opt.ReplyMarkup)
 		params["reply_markup"] = string(replyMarkup)
 	}
+
+	if opt.Protected {
+		params["protect_content"] = "true"
+	}
 }
 
 func processButtons(keys [][]InlineButton) {