Registry Fee Extension for the Extensible Provisioning Protocol (EPP)
RFC 8748

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Internet Engineering Task Force (IETF)                         R. Carney
Request for Comments: 8748                                  GoDaddy Inc.
Category: Standards Track                                       G. Brown
ISSN: 2070-1721                                     CentralNic Group plc
                                                               J. Frakes
                                                              March 2020

 Registry Fee Extension for the Extensible Provisioning Protocol (EPP)

Abstract

   Given the expansion of the DNS namespace and the proliferation of
   novel business models, it is desirable to provide a method for
   Extensible Provisioning Protocol (EPP) clients to query EPP servers
   for the fees and credits associated with various billable
   transactions and provide expected fees and credits for certain
   commands and objects.  This document describes an EPP extension
   mapping for registry fees.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8748.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction
     1.1.  Conventions Used in This Document
   2.  Migrating to Newer Versions of This Extension
   3.  Extension Elements
     3.1.  Client Commands
     3.2.  Currency Codes
     3.3.  Validity Periods
     3.4.  Fees and Credits
       3.4.1.  Refunds
       3.4.2.  Grace Periods
       3.4.3.  Correlation between Refundability and Grace Periods
       3.4.4.  Applicability
     3.5.  Account Balance
     3.6.  Credit Limit
     3.7.  Classification of Objects
     3.8.  "Phase" and "Subphase" Attributes
     3.9.  Reason
   4.  Server Handling of Fee Information
   5.  EPP Command Mapping
     5.1.  EPP Query Commands
       5.1.1.  EPP <check> Command
       5.1.2.  EPP Transfer Query Command
     5.2.  EPP Transform Commands
       5.2.1.  EPP <create> Command
       5.2.2.  EPP <delete> Command
       5.2.3.  EPP <renew> Command
       5.2.4.  EPP <transfer> Command
       5.2.5.  EPP <update> Command
   6.  Formal Syntax
     6.1.  Fee Extension Schema
   7.  Security Considerations
   8.  IANA Considerations
     8.1.  XML Namespace
     8.2.  EPP Extension Registry
   9.  References
     9.1.  Normative References
     9.2.  Informative References
   Acknowledgements
   Authors' Addresses

1.  Introduction

   Historically, domain name registries have applied a simple fee
   structure for billable transactions, namely a basic unit price
   applied to domain <create>, <renew>, <transfer>, and Redemption Grace
   Period (RGP) [RFC3915] restore commands.  Given the relatively small
   number of EPP servers to which EPP clients have been required to
   connect, it has generally been the case that client operators have
   been able to obtain details of these fees out of band by contacting
   the server operators.

   Given the expansion of the DNS namespace and the proliferation of
   novel business models, it is desirable to provide a method for EPP
   clients to query EPP servers for the fees and credits associated with
   various billable transactions and certain commands and specific
   objects.

   This document describes an extension mapping for version 1.0 of the
   Extensible Provisioning Protocol (EPP) [RFC5730].  This EPP mapping
   provides a mechanism by which EPP clients may query the fees and
   credits associated with various billable transactions and obtain
   their current account balance.

1.1.  Conventions Used in This Document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

   XML is case sensitive.  Unless stated otherwise, the XML