Add response parameters to error messages

bot.go

@@ -79,7 +79,11 @@ func (bot *BotAPI) MakeRequest(endpoint string, params url.Values) (APIResponse,
 	}
 
 	if !apiResp.Ok {
-		return apiResp, errors.New(apiResp.Description)
+		parameters := ResponseParameters{}
+		if apiResp.Parameters != nil {
+			parameters = *apiResp.Parameters
+		}
+		return apiResp, Error{apiResp.Description, parameters}
 	}
 
 	return apiResp, nil

types.go

@@ -410,7 +410,7 @@ type InlineKeyboardButton struct {
 	SwitchInlineQuery            *string       `json:"switch_inline_query,omitempty"`              // optional
 	SwitchInlineQueryCurrentChat *string       `json:"switch_inline_query_current_chat,omitempty"` // optional
 	CallbackGame                 *CallbackGame `json:"callback_game,omitempty"`                    // optional
-	Pay                          bool          `json:"pay,omitempty"`			       // optional
+	Pay                          bool          `json:"pay,omitempty"`                              // optional
 }
 
 // CallbackQuery is data sent when a keyboard button with callback data
@@ -771,3 +771,12 @@ type PreCheckoutQuery struct {
 	ShippingOptionID string     `json:"shipping_option_id,omitempty"`
 	OrderInfo        *OrderInfo `json:"order_info,omitempty"`
 }
+
+type Error struct {
+	Message string
+	ResponseParameters
+}
+
+func (e Error) Error() string {
+	return e.Message
+}