From 1030c813e2c07d87d45597d396d7f0d021759cee Mon Sep 17 00:00:00 2001
From: madagaga <le.malgache@gmail.com>
Date: Fri, 25 Mar 2016 16:03:39 +0100
Subject: [PATCH] revert schema - .proto file is incomplete.

---
 WTalk/Core/Client.cs                  |    3 +-
 WTalk/Core/ProtoJson/Schema.cs        | 2593 ++++++++++++++++++++++++-
 WTalk/Core/Schema/schema_generator.cs | 2155 --------------------
 WTalk/WTalk.csproj                    |    5 -
 4 files changed, 2593 insertions(+), 2163 deletions(-)
 delete mode 100644 WTalk/Core/Schema/schema_generator.cs

diff --git a/WTalk/Core/Client.cs b/WTalk/Core/Client.cs
index 74bf73c..de1699c 100644
--- a/WTalk/Core/Client.cs
+++ b/WTalk/Core/Client.cs
@@ -498,7 +498,8 @@ public void GetSelfInfo()
         {
             GetSelfInfoRequest request = new GetSelfInfoRequest()
             {
-                request_header = RequestHeaderBody
+                request_header = RequestHeaderBody,
+                
             };
             
             HttpResponseMessage message = _client.PostProtoJson("contacts/getselfinfo", request);
diff --git a/WTalk/Core/ProtoJson/Schema.cs b/WTalk/Core/ProtoJson/Schema.cs
index 79bd0a8..6b2eb2e 100644
--- a/WTalk/Core/ProtoJson/Schema.cs
+++ b/WTalk/Core/ProtoJson/Schema.cs
@@ -1,8 +1,2597 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using WTalk.Core.ProtoJson;
 
 namespace WTalk.Core.ProtoJson.Schema
 {
-    
+    /*
+
+hangouts.proto - Unofficial, reverse engineered Protocol Buffers for Google's
+Hangouts chat protocol.
+
+Originally based on Darryl Pogue's reversed engineered proto file from an early
+version of Hangouts for Android: https://gist.github.com/dpogue/5692114
+
+Field and message name should generally match those used by Google, with the
+major exception that "Client" prefixes have been removed.
+
+(repeated)\s(\w*)\s(\w*)\s\=\s(\d*)\; =>  [ProtoMember\(\4\)]\r\n public List<\2> \3 {get;set;}\r\n
+(optional)\s(\w*)\s(\w*)\s\=\s(\d*)\; =>  [ProtoMember\(\4\)]\r\n public \2 \3 {get;set;}\r\n
+ */
+
+
+
+
+    // Describes which Hangouts client is active.
+    internal enum ActiveClientState : int
+    {
+        // No client is active.
+        ACTIVE_CLIENT_STATE_NO_ACTIVE = 0,
+        // This is the active client.
+        ACTIVE_CLIENT_STATE_IS_ACTIVE = 1,
+        // Other client is active.
+        ACTIVE_CLIENT_STATE_OTHER_ACTIVE = 2
+    }
+
+    // The state of do-not-disturb mode. Not to be confused with DndSetting, which
+    // is used to change the state of do-not-disturb mode.
+    [ProtoContract]
+    internal class DoNotDisturbSetting
+    {
+        // Whether do-not-disturb mode is enabled.
+        [ProtoMember(Position = 1)]
+        public bool do_not_disturb { get; set; }
+
+        // Timestamp when do-not-disturb mode expires.
+        [ProtoMember(Position = 2)]
+        public long expiration_timestamp { get; set; }
+
+        // Timestamp when this setting was applied. Not present when this message
+        // comes from a notification.
+        [ProtoMember(Position = 3)]
+        public long version { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class NotificationSettings
+    {
+        [ProtoMember(Position = 1)]
+        public DoNotDisturbSetting dnd_settings { get; set; }
+
+    }
+
+    internal enum FocusType : int
+    {
+        FOCUS_TYPE_UNKNOWN = 0,
+        FOCUS_TYPE_FOCUSED = 1,
+        FOCUS_TYPE_UNFOCUSED = 2
+    }
+
+    internal enum FocusDevice : int
+    {
+        FOCUS_DEVICE_UNSPECIFIED = 0,
+        FOCUS_DEVICE_DESKTOP = 20,
+        FOCUS_DEVICE_MOBILE = 300,
+    }
+
+    // Identifies a conversation.
+    [ProtoContract]
+    internal class ConversationId
+    {
+        // Unique identifier for a conversation.
+        [ProtoMember(Position = 1)]
+        public string id { get; set; }
+
+    }
+
+    // Identifies a user.
+    [ProtoContract]
+    internal class ParticipantId
+    {
+        // Unique identifier for a user's Google account.
+        [ProtoMember(Position = 1, Optional = true)]
+        public string gaia_id { get; set; }
+
+        // Seems to always be the same as gaia_id.
+        [ProtoMember(Position = 2)]
+        public string chat_id { get; set; }
+
+    }
+
+    // Indicates whether Hangouts is active (running in the foreground) on
+    // different types of devices.
+    [ProtoContract]
+    internal class DeviceStatus
+    {
+        // True if a mobile phone is active.
+        [ProtoMember(Position = 1)]
+        public bool mobile { get; set; }
+
+        // True if a desktop or laptop is active.
+        [ProtoMember(Position = 2)]
+        public bool desktop { get; set; }
+
+        // True if a tablet is active.
+        [ProtoMember(Position = 3)]
+        public bool tablet { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class Presence
+    {
+        [ProtoMember(Position = 1)]
+        public bool reachable { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public bool available { get; set; }
+
+        [ProtoMember(Position = 6)]
+        public DeviceStatus device_status { get; set; }
+
+        [ProtoMember(Position = 9)]
+        public MoodMessage mood_message { get; set; }
+
+        [ProtoMember(Position = 10)]
+        public LastSeen last_seen { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class PresenceResult
+    {
+        [ProtoMember(Position = 1)]
+        public ParticipantId user_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public Presence presence { get; set; }
+
+    }
+
+    internal enum TypingType : int
+    {
+        TYPING_TYPE_UNKNOWN = 0,
+        // Started typing.
+        TYPING_TYPE_STARTED = 1,
+        // Stopped typing with inputted text.
+        TYPING_TYPE_PAUSED = 2,
+        // Stopped typing with no inputted text.
+        TYPING_TYPE_STOPPED = 3
+    }
+
+    [ProtoContract]
+    internal class ClientIdentifier
+    {
+        // (client_id in hangups).
+        [ProtoMember(Position = 1)]
+        public string resource { get; set; }
+
+        // unknown (header_id in hangups).
+        [ProtoMember(Position = 2)]
+        public string header_id { get; set; }
+
+    }
+
+    internal enum ClientPresenceStateType : int
+    {
+        CLIENT_PRESENCE_STATE_UNKNOWN = 0,
+        CLIENT_PRESENCE_STATE_NONE = 1,
+        CLIENT_PRESENCE_STATE_DESKTOP_IDLE = 30,
+        CLIENT_PRESENCE_STATE_DESKTOP_ACTIVE = 40
+
+        // TODO
+    }
+
+    [ProtoContract]
+    internal class ClientPresenceState
+    {
+        [ProtoMember(Position = 1)]
+        public ClientIdentifier identifier { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ClientPresenceStateType state { get; set; }
+
+    }
+
+    internal enum NotificationLevel : int
+    {
+        NOTIFICATION_LEVEL_UNKNOWN = 0,
+        // Notifications are disabled.
+        NOTIFICATION_LEVEL_QUIET = 10,
+        // Notifications are enabled
+        NOTIFICATION_LEVEL_RING = 30
+    }
+
+    [ProtoContract]
+    internal class UserEventState
+    {
+        [ProtoMember(Position = 1)]
+        public ParticipantId user_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public string client_generated_id { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public NotificationLevel notification_level { get; set; }
+
+    }
+
+    internal enum SegmentType : int
+    {
+        // Segment is text.
+        SEGMENT_TYPE_TEXT = 0,
+        // Segment is a line break.
+        SEGMENT_TYPE_LINE_BREAK = 1,
+        // Segment is hyperlinked text.
+        SEGMENT_TYPE_LINK = 2
+    }
+
+    [ProtoContract]
+    internal class Formatting
+    {
+        [ProtoMember(Position = 1)]
+        public bool bold { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public bool italic { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public bool strikethrough { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public bool underline { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class LinkData
+    {
+        [ProtoMember(Position = 1)]
+        public string link_target { get; set; }
+
+    }
+
+    // A segment of a message. Message are broken into segments that may be of
+    // different types and have different formatting.
+    [ProtoContract]
+    internal class Segment
+    {
+        // Note: This field is required because Hangouts for Chrome misbehaves if it
+        // isn't serialized.
+        [ProtoMember(Position = 1)]
+        public SegmentType type { get; set; }
+        // The segment text. For line breaks, may either be empty or contain new line
+        // character.
+        [ProtoMember(Position = 2)]
+        public string text { get; set; }
+
+        // Formatting for this segment.
+        [ProtoMember(Position = 3)]
+        public Formatting formatting { get; set; }
+
+        // Link data for this segment, if it is a link.
+        [ProtoMember(Position = 4)]
+        public LinkData link_data { get; set; }
+
+    }
+
+    // A type of embedded item.
+    internal enum ItemType : int
+    {
+        ITEM_TYPE_THING = 0,
+        // Google Plus photo.
+        ITEM_TYPE_PLUS_PHOTO = 249,
+        ITEM_TYPE_PLACE = 335,
+        // Google Map place.
+        ITEM_TYPE_PLACE_V2 = 340
+    }
+
+    // Google Plus photo that can be embedded in a chat message.
+    [ProtoContract]
+    internal class PlusPhoto
+    {
+
+        // Metadata for displaying an image thumbnail.
+        [ProtoContract]
+        internal class Thumbnail
+        {
+
+            // URL to navigate to when thumbnail is selected (a Google Plus album
+            // page).
+            [ProtoMember(Position = 1)]
+            public string url { get; set; }
+
+            // URL of thumbnail image.
+            [ProtoMember(Position = 4)]
+            public string image_url { get; set; }
+
+            // Image width in pixels.
+            [ProtoMember(Position = 10)]
+            public long width_px { get; set; }
+
+            // Image height in pixels.
+            [ProtoMember(Position = 11)]
+            public long height_px { get; set; }
+
+        }
+
+        // Media type.
+        internal enum MediaType
+        {
+            MEDIA_TYPE_UNKNOWN = 0,
+            MEDIA_TYPE_PHOTO = 1
+        }
+
+        // Thumbnail.
+        [ProtoMember(Position = 1)]
+        public Thumbnail thumbnail { get; set; }
+
+        // Owner obfuscated ID.
+        [ProtoMember(Position = 2)]
+        public string owner_obfuscated_id { get; set; }
+
+        // Album ID.
+        [ProtoMember(Position = 3)]
+        public string album_id { get; set; }
+
+        // Photo ID.
+        [ProtoMember(Position = 4)]
+        public string photo_id { get; set; }
+
+        // URL of full-sized image.
+        [ProtoMember(Position = 6)]
+        public string url { get; set; }
+
+        // URL of image thumbnail.
+        [ProtoMember(Position = 10)]
+        public string original_content_url { get; set; }
+
+        // The media type.
+        [ProtoMember(Position = 13)]
+        public MediaType media_type { get; set; }
+
+        // List of stream ID parameters.
+        [ProtoMember(Position = 14)]
+        public List<string> stream_id { get; set; }
+
+
+    }
+
+    // Place that can be embedded in a chat message via Google Maps.
+    [ProtoContract]
+    internal class Place
+    {
+
+        // Representative image of a place.
+        [ProtoContract]
+        internal class RepresentativeImage
+        {
+            // URL of image.
+            [ProtoMember(Position = 2)]
+            public string url { get; set; }
+
+        }
+
+        // Google Maps URL pointing to the map coordinates.
+        [ProtoMember(Position = 1)]
+        public string url { get; set; }
+
+        // Name of map location.
+        [ProtoMember(Position = 3)]
+        public string name { get; set; }
+
+        // Representative image of the place (map with pin).
+        [ProtoMember(Position = 185)]
+        public RepresentativeImage representative_image { get; set; }
+
+    }
+
+    // An item of some type embedded in a chat message.
+    [ProtoContract]
+    internal class EmbedItem
+    {
+        // List of embedded item types in this message.
+        [ProtoMember(Position = 1)]
+        public List<ItemType> type { get; set; }
+
+        // For photos this is not given, for maps, it's the URL of the map.
+        [ProtoMember(Position = 2)]
+        public string id { get; set; }
+
+        // Embedded Google Plus photo.
+        [ProtoMember(Position = 27639957)]
+        public PlusPhoto plus_photo { get; set; }
+
+        // Embedded Google Map of a place.
+        [ProtoMember(Position = 35825640)]
+        public Place place { get; set; }
+
+    }
+
+    // An attachment for a chat message.
+    [ProtoContract]
+    internal class Attachment
+    {
+        [ProtoMember(Position = 1)]
+        public EmbedItem embed_item { get; set; }
+
+    }
+
+    // Chat message content.
+    [ProtoContract]
+    internal class MessageContent
+    {
+        [ProtoMember(Position = 1)]
+        public List<Segment> segment { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public List<Attachment> attachment { get; set; }
+
+    }
+
+    // Annotation that can be applied to a chat message event. The only known use
+    // for this is "\me" actions supported by the Chrome client (type 4).
+    [ProtoContract]
+    internal class EventAnnotation
+    {
+        // Annotation type.
+        [ProtoMember(Position = 1)]
+        public int type { get; set; }
+
+        // Optional annotation string value.
+        [ProtoMember(Position = 2)]
+        public string value { get; set; }
+
+    }
+
+    // A chat message in a conversation.
+    [ProtoContract]
+    internal class ChatMessage
+    {
+        // Optional annotation to attach to message.
+        [ProtoMember(Position = 2)]
+        public List<EventAnnotation> annotation { get; set; }
+
+        // The message's content.
+        [ProtoMember(Position = 3)]
+        public MessageContent message_content { get; set; }
+
+
+        // TODO:
+        // always 0? = 1;
+    }
+
+    internal enum MembershipChangeType : int
+    {
+        MEMBERSHIP_CHANGE_TYPE_JOIN = 1,
+        MEMBERSHIP_CHANGE_TYPE_LEAVE = 2
+    }
+
+    [ProtoContract]
+    internal class MembershipChange
+    {
+        [ProtoMember(Position = 1)]
+        public MembershipChangeType type { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public List<ParticipantId> participant_ids { get; set; }
+
+
+        // TODO:
+        // unknown [] = 2;
+        // leave_reason (4, 2) = 4;
+    }
+
+    [ProtoContract]
+    internal class ConversationRename
+    {
+        [ProtoMember(Position = 1)]
+        public string new_name { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public string old_name { get; set; }
+
+    }
+
+    internal enum HangoutEventType : int
+    {
+        HANGOUT_EVENT_TYPE_UNKNOWN = 0,
+        HANGOUT_EVENT_TYPE_START = 1,
+        HANGOUT_EVENT_TYPE_END = 2,
+        HANGOUT_EVENT_TYPE_JOIN = 3,
+        HANGOUT_EVENT_TYPE_LEAVE = 4,
+        HANGOUT_EVENT_TYPE_COMING_SOON = 5,
+        HANGOUT_EVENT_TYPE_ONGOING = 6
+    }
+
+    [ProtoContract]
+    internal class HangoutEvent
+    {
+        [ProtoMember(Position = 1)]
+        public HangoutEventType event_type { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public List<ParticipantId> participant_id { get; set; }
+
+
+        // TODO:
+        // unknown 7 = 1;
+        // unknown 3 = 25;
+    }
+
+    [ProtoContract]
+    internal class OTRModification
+    {
+        [ProtoMember(Position = 1)]
+        public OffTheRecordStatus old_otr_status { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public OffTheRecordStatus new_otr_status { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public OffTheRecordToggle old_otr_toggle { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public OffTheRecordToggle new_otr_toggle { get; set; }
+
+    }
+
+    // Whether the OTR toggle is available to the user.
+    internal enum OffTheRecordToggle : int
+    {
+        OFF_THE_RECORD_TOGGLE_UNKNOWN = 0,
+        OFF_THE_RECORD_TOGGLE_ENABLED = 1,
+        OFF_THE_RECORD_TOGGLE_DISABLED = 2,
+    }
+
+    internal enum OffTheRecordStatus : int
+    {
+        OFF_THE_RECORD_STATUS_UNKNOWN = 0,
+        // Conversation is off-the-record (history disabled).
+        OFF_THE_RECORD_STATUS_OFF_THE_RECORD = 1,
+        // Conversation is on-the-record (history enabled).
+        OFF_THE_RECORD_STATUS_ON_THE_RECORD = 2
+    }
+
+    internal enum SourceType : int
+    {
+        SOURCE_TYPE_UNKNOWN = 0,
+    }
+
+    internal enum EventType : int
+    {
+        EVENT_TYPE_UNKNOWN = 0,
+        EVENT_TYPE_REGULAR_CHAT_MESSAGE = 1,
+        EVENT_TYPE_SMS = 2,
+        EVENT_TYPE_VOICEMAIL = 3,
+        EVENT_TYPE_ADD_USER = 4,
+        EVENT_TYPE_REMOVE_USER = 5,
+        EVENT_TYPE_CONVERSATION_RENAME = 6,
+        EVENT_TYPE_HANGOUT = 7,
+        EVENT_TYPE_PHONE_CALL = 8,
+        EVENT_TYPE_OTR_MODIFICATION = 9,
+        EVENT_TYPE_PLAN_MUTATION = 10,
+        EVENT_TYPE_MMS = 11,
+        EVENT_TYPE_DEPRECATED_12 = 12,
+    }
+
+    [ProtoContract]
+    internal class HashModifier
+    {
+        [ProtoMember(Position = 1)]
+        public string update_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public long hash_diff { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public long version { get; set; }
+
+    }
+
+    // Event that becomes part of a conversation's history.
+    [ProtoContract]
+    internal class Event
+    {
+        // ID of the conversation this event belongs to.
+        [ProtoMember(Position = 1)]
+        public ConversationId conversation_id { get; set; }
+
+        // ID of the user that sent this event.
+        [ProtoMember(Position = 2)]
+        public ParticipantId sender_id { get; set; }
+
+        // Timestamp when the event occurred.
+        [ProtoMember(Position = 3)]
+        public long timestamp { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public UserEventState self_event_state { get; set; }
+
+        [ProtoMember(Position = 6)]
+        public SourceType source_type { get; set; }
+
+        [ProtoMember(Position = 7)]
+        public ChatMessage chat_message { get; set; }
+
+        [ProtoMember(Position = 9)]
+        public MembershipChange membership_change { get; set; }
+
+        [ProtoMember(Position = 10)]
+        public ConversationRename conversation_rename { get; set; }
+
+        [ProtoMember(Position = 11)]
+        public HangoutEvent hangout_event { get; set; }
+
+        // Unique ID for the event.
+        [ProtoMember(Position = 12)]
+        public string event_id { get; set; }
+
+        [ProtoMember(Position = 13)]
+        public long expiration_timestamp { get; set; }
+
+        [ProtoMember(Position = 14)]
+        public OTRModification otr_modification { get; set; }
+
+        [ProtoMember(Position = 15)]
+        public bool advances_sort_timestamp { get; set; }
+
+        [ProtoMember(Position = 16)]
+        public OffTheRecordStatus otr_status { get; set; }
+
+        [ProtoMember(Position = 17)]
+        public bool persisted { get; set; }
+
+        [ProtoMember(Position = 20)]
+        public DeliveryMedium medium_type { get; set; }
+
+        // The event's type.
+        [ProtoMember(Position = 23)]
+        public EventType event_type { get; set; }
+
+        // Event version timestamp.
+        [ProtoMember(Position = 24)]
+        public long event_version { get; set; }
+
+        [ProtoMember(Position = 26)]
+        public HashModifier hash_modifier { get; set; }
+
+    }
+
+    internal enum ConversationType : int
+    {
+        CONVERSATION_TYPE_UNKNOWN = 0,
+        // Conversation is one-to-one (only 2 participants).
+        CONVERSATION_TYPE_ONE_TO_ONE = 1,
+        // Conversation is group (any number of participants).
+        CONVERSATION_TYPE_GROUP = 2
+    }
+
+    [ProtoContract]
+    internal class UserReadState
+    {
+        [ProtoMember(Position = 1)]
+        public ParticipantId participant_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public long latest_read_timestamp { get; set; }
+
+
+        // TODO: is latest_read_timestamp always 0?
+    }
+
+    internal enum ConversationStatus : int
+    {
+        CONVERSATION_STATUS_UNKNOWN = 0,
+        // User is invited to conversation.
+        CONVERSATION_STATUS_INVITED = 1,
+        // User is participating in conversation.
+        CONVERSATION_STATUS_ACTIVE = 2,
+        // User has left conversation.
+        CONVERSATION_STATUS_LEFT = 3
+    }
+
+    internal enum ConversationView : int
+    {
+        CONVERSATION_VIEW_UNKNOWN = 0,
+        // Conversation is in inbox.
+        CONVERSATION_VIEW_INBOX = 1,
+        // Conversation has been archived.
+        CONVERSATION_VIEW_ARCHIVED = 2
+    }
+
+    internal enum DeliveryMediumType : int
+    {
+        DELIVERY_MEDIUM_UNKNOWN = 0,
+        DELIVERY_MEDIUM_BABEL = 1,
+        DELIVERY_MEDIUM_GOOGLE_VOICE = 2,
+        DELIVERY_MEDIUM_LOCAL_SMS = 3
+    }
+
+    [ProtoContract]
+    internal class DeliveryMedium
+    {
+        [ProtoMember(Position = 1)]
+        public DeliveryMediumType medium_type { get; set; }
+
+        // Phone number to use for sending Google Voice messages.
+        [ProtoMember(Position = 2, Optional = true)]
+        public Phone phone { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class DeliveryMediumOption
+    {
+        [ProtoMember(Position = 1)]
+        public DeliveryMedium delivery_medium { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public bool current_default { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class UserConversationState
+    {
+        [ProtoMember(Position = 2)]
+        public string client_generated_id { get; set; }
+
+        [ProtoMember(Position = 7)]
+        public UserReadState self_read_state { get; set; }
+
+        [ProtoMember(Position = 8)]
+        public ConversationStatus status { get; set; }
+
+        [ProtoMember(Position = 9)]
+        public NotificationLevel notification_level { get; set; }
+
+        [ProtoMember(Position = 10)]
+        public List<ConversationView> view { get; set; }
+
+        [ProtoMember(Position = 11)]
+        public ParticipantId inviter_id { get; set; }
+
+        [ProtoMember(Position = 12)]
+        public long invite_timestamp { get; set; }
+
+        [ProtoMember(Position = 13)]
+        public long sort_timestamp { get; set; }
+
+        [ProtoMember(Position = 14)]
+        public long active_timestamp { get; set; }
+
+        [ProtoMember(Position = 17)]
+        public List<DeliveryMediumOption> delivery_medium_option { get; set; }
+
+    }
+
+    internal enum ParticipantType : int
+    {
+        PARTICIPANT_TYPE_UNKNOWN = 0,
+        PARTICIPANT_TYPE_GAIA = 2
+    }
+
+    internal enum InvitationStatus : int
+    {
+        INVITATION_STATUS_UNKNOWN = 0,
+        INVITATION_STATUS_PENDING = 1,
+        INVITATION_STATUS_ACCEPTED = 2
+    }
+
+    [ProtoContract]
+    internal class ConversationParticipantData
+    {
+        [ProtoMember(Position = 1)]
+        public ParticipantId id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public string fallback_name { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public InvitationStatus invitation_status { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public ParticipantType participant_type { get; set; }
+
+        [ProtoMember(Position = 6)]
+        public InvitationStatus new_invitation_status { get; set; }
+
+    }
+
+    internal enum ForceHistory : int
+    {
+        FORCE_HISTORY_UNKNOWN = 0,
+        FORCE_HISTORY_NO = 1
+    }
+
+    internal enum NetworkType : int
+    {
+        NETWORK_TYPE_UNKNOWN = 0,
+        NETWORK_TYPE_BABEL = 1
+    }
+
+    // A conversation between two or more users.
+    [ProtoContract]
+    internal class Conversation
+    {
+        [ProtoMember(Position = 1)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ConversationType type { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public string name { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public UserConversationState self_conversation_state { get; set; }
+
+        [ProtoMember(Position = 8)]
+        public List<UserReadState> read_state { get; set; }
+
+        // True if the conversation has an active Hangout.
+        [ProtoMember(Position = 9)]
+        public bool has_active_hangout { get; set; }
+
+        // The conversation's "off the record" status.
+        [ProtoMember(Position = 10)]
+        public OffTheRecordStatus otr_status { get; set; }
+
+        // Whether the OTR toggle is available to the user for this conversation.
+        [ProtoMember(Position = 11)]
+        public OffTheRecordToggle otr_toggle { get; set; }
+
+        [ProtoMember(Position = 12)]
+        public bool conversation_history_supported { get; set; }
+
+        [ProtoMember(Position = 13)]
+        public List<ParticipantId> current_participant { get; set; }
+
+        [ProtoMember(Position = 14)]
+        public List<ConversationParticipantData> participant_data { get; set; }
+
+        [ProtoMember(Position = 18)]
+        public List<NetworkType> network_type { get; set; }
+
+        [ProtoMember(Position = 19)]
+        public ForceHistory force_history_state { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class EasterEgg
+    {
+        [ProtoMember(Position = 1)]
+        public string message { get; set; }
+
+    }
+
+    internal enum BlockState : int
+    {
+        BLOCK_STATE_UNKNOWN = 0,
+        BLOCK_STATE_BLOCK = 1,
+        BLOCK_STATE_UNBLOCK = 2
+    }
+
+    [ProtoContract]
+    internal class BlockStateChange
+    {
+        [ProtoMember(Position = 1)]
+        public ParticipantId participant_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public BlockState new_block_state { get; set; }
+
+    }
+
+    internal enum ReplyToInviteType : int
+    {
+        REPLY_TO_INVITE_TYPE_UNKNOWN = 0,
+        REPLY_TO_INVITE_TYPE_ACCEPT = 1,
+        REPLY_TO_INVITE_TYPE_DECLINE = 2
+    }
+
+    [ProtoContract]
+    internal class Photo
+    {
+        [ProtoMember(Position = 1)]
+        public string photo_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public bool delete_albumless_source_photo { get; set; }
+
+
+        // TODO: test delete_albumless_source_photo
+    }
+
+    [ProtoContract]
+    internal class ExistingMedia
+    {
+        [ProtoMember(Position = 1)]
+        public Photo photo { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class EventRequestHeader
+    {
+        [ProtoMember(Position = 1)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public long client_generated_id { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public OffTheRecordStatus expected_otr { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public DeliveryMedium delivery_medium { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public EventType event_type { get; set; }
+
+    }
+
+    // Identifies the client.
+    internal enum ClientId : int
+    {
+        CLIENT_ID_UNKNOWN = 0,
+        // Hangouts app for Android.
+        CLIENT_ID_ANDROID = 1,
+        // Hangouts app for iOS.
+        CLIENT_ID_IOS = 2,
+        // Hangouts Chrome extension.
+        CLIENT_ID_CHROME = 3,
+        // Hangouts web interface in Google Plus.
+        CLIENT_ID_WEB_GPLUS = 5,
+        // Hangouts web interface in Gmail.
+        CLIENT_ID_WEB_GMAIL = 6,
+        // Hangouts Chrome app ("ultraviolet").
+        CLIENT_ID_ULTRAVIOLET = 13
+    }
+
+    // Build type of the client.
+    internal enum ClientBuildType : int
+    {
+        BUILD_TYPE_UNKNOWN = 0,
+        // Web app.
+        BUILD_TYPE_PRODUCTION_WEB = 1,
+        // Native app.
+        BUILD_TYPE_PRODUCTION_APP = 3
+    }
+
+    // The client and device version.
+    [ProtoContract]
+    internal class ClientVersion
+    {
+        // Identifies the client.
+        [ProtoMember(Position = 1)]
+        public ClientId client_id { get; set; }
+
+        // The client build type.
+        [ProtoMember(Position = 2)]
+        public ClientBuildType build_type { get; set; }
+
+        // Client version.
+        [ProtoMember(Position = 3, Optional = true)]
+        public string major_version { get; set; }
+
+        // Client version timestamp.
+        [ProtoMember(Position = 4)]
+        public long version_timestamp { get; set; }
+
+        // OS version string (for native apps).
+        [ProtoMember(Position = 5, Optional = true)]
+        public string device_os_version { get; set; }
+
+        // Device hardware name (for native apps).
+        [ProtoMember(Position = 6, Optional = true)]
+        public string device_hardware { get; set; }
+
+    }
+
+    // Header for requests from the client to the server.
+    [ProtoContract]
+    internal class RequestHeader
+    {
+        [ProtoMember(Position = 1)]
+        public ClientVersion client_version { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ClientIdentifier client_identifier { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public object unknow { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public string language_code { get; set; }
+
+
+        // TODO: incomplete
+    }
+
+    // Status of the response from the server to the client.
+    internal enum ResponseStatus : int
+    {
+        RESPONSE_STATUS_UNKNOWN = 0,
+        RESPONSE_STATUS_OK = 1,
+        RESPONSE_STATUS_UNEXPECTED_ERROR = 3,
+        RESPONSE_STATUS_INVALID_REQUEST = 4,
+    }
+
+    // Header for responses from the server to the client.
+    [ProtoContract]
+    internal class ResponseHeader
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseStatus status { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public string error_description { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public string debug_url { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public string request_trace_id { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public long current_server_time { get; set; }
+
+    }
+
+    // A user that can participate in conversations.
+    [ProtoContract]
+    internal class Entity
+    {
+        // The user's ID.
+        [ProtoMember(Position = 9)]
+        public ParticipantId id { get; set; }
+
+        // Optional user presence status.
+        [ProtoMember(Position = 8)]
+        public Presence presence { get; set; }
+
+        // Optional user properties.
+        [ProtoMember(Position = 10)]
+        public EntityProperties properties { get; set; }
+
+        [ProtoMember(Position = 13)]
+        public ParticipantType entity_type { get; set; }
+
+        internal enum PastHangoutState
+        {
+            PAST_HANGOUT_STATE_UNKNOWN = 0,
+            PAST_HANGOUT_STATE_HAD_PAST_HANGOUT = 1,
+            PAST_HANGOUT_STATE_NO_PAST_HANGOUT = 2,
+        }
+
+        [ProtoMember(Position = 16)]
+        public PastHangoutState had_past_hangout_state { get; set; }
+
+        // TODO:
+        // unknown 1 = 15;
+        // unknown 2 = 17;
+    }
+
+    [ProtoContract]
+    internal class EntityProperties
+    {
+        [ProtoMember(Position = 1)]
+        public ProfileType type { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public string display_name { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public string first_name { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public string photo_url { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public List<string> email { get; set; }
+
+        [ProtoMember(Position = 6)]
+        public List<string> phone { get; set; }
+
+        [ProtoMember(Position = 10)]
+        public bool in_users_domain { get; set; }
+
+        [ProtoMember(Position = 11)]
+        public Gender gender { get; set; }
+
+        [ProtoMember(Position = 12)]
+        public PhotoUrlStatus photo_url_status { get; set; }
+
+        [ProtoMember(Position = 15)]
+        public string canonical_email { get; set; }
+
+    }
+
+    // Status of EntityProperties.photo_url.
+    internal enum PhotoUrlStatus : int
+    {
+        PHOTO_URL_STATUS_UNKNOWN = 0,
+        // URL is a placeholder.
+        PHOTO_URL_STATUS_PLACEHOLDER = 1,
+        // URL is a photo set by the user.
+        PHOTO_URL_STATUS_USER_PHOTO = 2,
+    }
+
+    internal enum Gender : int
+    {
+        GENDER_UNKNOWN = 0,
+        GENDER_MALE = 1,
+        GENDER_FEMALE = 2,
+    }
+
+    internal enum ProfileType : int
+    {
+        PROFILE_TYPE_NONE = 0,
+        PROFILE_TYPE_ES_USER = 1,
+    }
+
+    // State of a conversation and recent events.
+    [ProtoContract]
+    internal class ConversationState
+    {
+        [ProtoMember(Position = 1)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public Conversation conversation { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public List<Event> events { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public EventContinuationToken event_continuation_token { get; set; }
+    }
+
+    // Token that allows retrieving more events from a position in a conversation.
+    // Specifying event_timestamp is sufficient.
+    [ProtoContract]
+    internal class EventContinuationToken
+    {
+        [ProtoMember(Position = 1)]
+        public string event_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public string storage_continuation_token { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public long event_timestamp { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class EntityLookupSpec
+    {
+        [ProtoMember(Position = 1)]
+        public string gaia_id { get; set; }
+
+
+        // TODO
+    }
+
+    // A type of binary configuration option.
+    internal enum ConfigurationBitType : int
+    {
+
+        // TODO
+        // RICH_PRESENCE_ACTIVITY_PROMO_SHOWN
+        // RICH_PRESENCE_DEVICE_PROMO_SHOWN
+        // RICH_PRESENCE_LAST_SEEN_DESKTOP_PROMO_SHOWN
+        // RICH_PRESENCE_LAST_SEEN_MOBILE_PROMO_SHOWN
+        // RICH_PRESENCE_IN_CALL_STATE_PROMO_SHOWN
+        // RICH_PRESENCE_MOOD_PROMO_SHOWN
+        // GV_SMS_INTEGRATION_PROMO_SHOWN
+        // RICH_PRESENCE_LAST_SEEN_DESKTOP_PROMPT_SHOWN
+        // BUSINESS_FEATURES_ENABLED
+        // BUSINESS_FEATURES_PROMO_DISMISSED
+        // CONVERSATION_INVITE_SETTINGS_SET_TO_CUSTOM
+        // REPORT_ABUSE_NOTICE_ACKNOWLEDGED
+        // PHONE_VERIFICATION_MOBILE_PROMPT_SHOWN
+        // HANGOUT_P2P_NOTICE_ACKNOWLEDGED
+        // HANGOUT_P2P_ENABLED
+        // INVITE_NOTIFICATIONS_ENABLED
+        // DESKTOP_AUTO_EMOJI_CONVERSION_ENABLED
+        // ALLOWED_FOR_DOMAIN
+        // GMAIL_CHAT_ARCHIVE_ENABLED
+        // QUASAR_MARKETING_PROMO_DISMISSED
+        // GPLUS_SIGNUP_PROMO_DISMISSED
+        // GPLUS_UPGRADE_ALLOWED_FOR_DOMAIN
+        // CHAT_WITH_CIRCLES_ACCEPTED
+        // CHAT_WITH_CIRCLES_PROMO_DISMISSED
+        // PHOTO_SERVICE_REGISTERED
+        // GV_SMS_INTEGRATION_ENABLED
+        // CAN_OPT_INTO_GV_SMS_INTEGRATION
+        // BUSINESS_FEATURES_ELIGIBLE
+        // CAN_USE_GV_CALLER_ID_FEATURE
+
+        CONFIGURATION_BIT_TYPE_UNKNOWN = 0,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_1 = 1,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_2 = 2,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_3 = 3,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_4 = 4,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_5 = 5,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_6 = 6,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_7 = 7,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_8 = 8,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_9 = 9,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_10 = 10,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_11 = 11,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_12 = 12,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_13 = 13,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_14 = 14,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_15 = 15,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_16 = 16,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_17 = 17,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_18 = 18,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_19 = 19,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_20 = 20,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_21 = 21,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_22 = 22,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_23 = 23,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_24 = 24,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_25 = 25,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_26 = 26,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_27 = 27,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_28 = 28,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_29 = 29,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_30 = 30,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_31 = 31,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_32 = 32,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_33 = 33,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_34 = 34,
+        CONFIGURATION_BIT_TYPE_UNKNOWN_35 = 35
+    }
+
+    [ProtoContract]
+    internal class ConfigurationBit
+    {
+        [ProtoMember(Position = 1)]
+        public ConfigurationBitType configuration_bit_type { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public bool value { get; set; }
+
+    }
+
+    internal enum RichPresenceType : int
+    {
+        RICH_PRESENCE_TYPE_UNKNOWN = 0,
+        RICH_PRESENCE_TYPE_IN_CALL_STATE = 1,
+
+        // TODO
+        // RICH_PRESENCE_TYPE_GLOBALLY_ENABLED
+        // RICH_PRESENCE_TYPE_ACTIVITY
+        // RICH_PRESENCE_TYPE_MOOD
+
+        RICH_PRESENCE_TYPE_UNKNOWN_3 = 3,
+        RICH_PRESENCE_TYPE_UNKNOWN_4 = 4,
+        RICH_PRESENCE_TYPE_UNKNOWN_5 = 5,
+
+        RICH_PRESENCE_TYPE_DEVICE = 2,
+        RICH_PRESENCE_TYPE_LAST_SEEN = 6
+    }
+
+    [ProtoContract]
+    internal class RichPresenceState
+    {
+        [ProtoMember(Position = 3)]
+        public List<RichPresenceEnabledState> get_rich_presence_enabled_state { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class RichPresenceEnabledState
+    {
+        [ProtoMember(Position = 1)]
+        public RichPresenceType type { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public bool enabled { get; set; }
+
+    }
+
+    internal enum FieldMask : int
+    {
+        FIELD_MASK_REACHABLE = 1,
+        FIELD_MASK_AVAILABLE = 2,
+        FIELD_MASK_MOOD = 3,
+        FIELD_MASK_IN_CALL = 6,
+        FIELD_MASK_DEVICE = 7,
+        FIELD_MASK_LAST_SEEN = 10
+    }
+
+    [ProtoContract]
+    internal class DesktopOffSetting
+    {
+        // State of "desktop off" setting.
+        [ProtoMember(Position = 1)]
+        public bool desktop_off { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class DesktopOffState
+    {
+        // Whether Hangouts desktop is signed off or on.
+        [ProtoMember(Position = 1)]
+        public bool desktop_off { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public long version { get; set; }
+
+    }
+
+    // Enable or disable do-not-disturb mode. Not to be confused with
+    // DoNotDisturbSetting, which is used to indicate the state of do-not-disturb
+    // mode.
+    [ProtoContract]
+    internal class DndSetting
+    {
+        // Whether to enable or disable do-not-disturb mode.
+        [ProtoMember(Position = 1)]
+        public bool do_not_disturb { get; set; }
+
+        // Do not disturb expiration in seconds.
+        [ProtoMember(Position = 2)]
+        public long timeout_secs { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class PresenceStateSetting
+    {
+        [ProtoMember(Position = 1)]
+        public long timeout_secs { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ClientPresenceStateType type { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class MoodMessage
+    {
+        [ProtoMember(Position = 1)]
+        public MoodContent mood_content { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class MoodContent
+    {
+        [ProtoMember(Position = 1)]
+        public List<Segment> segment { get; set; }
+
+    }
+
+    // The user's mood message.
+    [ProtoContract]
+    internal class MoodSetting
+    {
+        [ProtoMember(Position = 1)]
+        public MoodMessage mood_message { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class LastSeen
+    {
+        [ProtoMember(Position = 1)]
+        public long last_seen_timestamp_usec { get; set; }
+    }
+
+    [ProtoContract]
+    internal class MoodState
+    {
+        [ProtoMember(Position = 4)]
+        public MoodSetting mood_setting { get; set; }
+
+    }
+
+    internal enum DeleteType : int
+    {
+        DELETE_TYPE_UNKNOWN = 0,
+        DELETE_TYPE_UPPER_BOUND = 1
+    }
+
+    [ProtoContract]
+    internal class DeleteAction
+    {
+        [ProtoMember(Position = 1)]
+        public long delete_action_timestamp { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public long delete_upper_bound_timestamp { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public DeleteType delete_type { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class InviteeID
+    {
+        [ProtoMember(Position = 1)]
+        public string gaia_id { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public string fallback_name { get; set; }
+
+    }
+
+    internal enum SyncFilter : int
+    {
+        SYNC_FILTER_UNKNOWN = 0,
+        SYNC_FILTER_INBOX = 1,
+        SYNC_FILTER_ARCHIVED = 2
+
+        // TODO
+    }
+
+    // Describes a user's country.
+    [ProtoContract]
+    internal class Country
+    {
+        // Abbreviated region code (eg. "CA").
+        [ProtoMember(Position = 1)]
+        public string region_code { get; set; }
+
+        // Country's calling code (eg. "1").
+        [ProtoMember(Position = 2)]
+        public long country_code { get; set; }
+
+    }
+
+    internal enum SoundState : int
+    {
+        SOUND_STATE_UNKNOWN = 0,
+        SOUND_STATE_ON = 1,
+        SOUND_STATE_OFF = 2
+    }
+
+    // Sound settings in the desktop Hangouts client.
+    [ProtoContract]
+    internal class DesktopSoundSetting
+    {
+        // Whether to play sound for incoming messages.
+        [ProtoMember(Position = 1)]
+        public SoundState desktop_sound_state { get; set; }
+
+        // Whether to ring for incoming calls.
+        [ProtoMember(Position = 2)]
+        public SoundState desktop_ring_sound_state { get; set; }
+
+    }
+
+    internal enum CallerIdSettingsMask : int
+    {
+        CALLER_ID_SETTINGS_MASK_UNKNOWN = 0,
+        CALLER_ID_SETTINGS_MASK_PROVIDED = 1
+    }
+
+    [ProtoContract]
+    internal class PhoneData
+    {
+        [ProtoMember(Position = 1)]
+        public List<Phone> phone { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public CallerIdSettingsMask caller_id_settings_mask { get; set; }
+
+    }
+
+    internal enum PhoneVerificationStatus : int
+    {
+        PHONE_VERIFICATION_STATUS_UNKNOWN = 0,
+        PHONE_VERIFICATION_STATUS_VERIFIED = 1
+    }
+
+    internal enum PhoneDiscoverabilityStatus : int
+    {
+        PHONE_DISCOVERABILITY_STATUS_UNKNOWN = 0,
+        PHONE_DISCOVERABILITY_STATUS_OPTED_IN_BUT_NOT_DISCOVERABLE = 2
+    }
+
+    [ProtoContract]
+    internal class Phone
+    {
+        [ProtoMember(Position = 1)]
+        public PhoneNumber phone_number { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public bool google_voice { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public PhoneVerificationStatus verification_status { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public bool discoverable { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public PhoneDiscoverabilityStatus discoverability_status { get; set; }
+
+        [ProtoMember(Position = 6)]
+        public bool primary { get; set; }
+
+    }
+
+    internal enum PhoneValidationResult : int
+    {
+        PHONE_VALIDATION_RESULT_IS_POSSIBLE = 0
+    }
+
+    [ProtoContract]
+    internal class I18nData
+    {
+        [ProtoMember(Position = 1)]
+        public string national_number { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public string international_number { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public long country_code { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public string region_code { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public bool is_valid { get; set; }
+
+        [ProtoMember(Position = 6)]
+        public PhoneValidationResult validation_result { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class PhoneNumber
+    {
+        // Phone number as string (eg. "+15551234567").
+        [ProtoMember(Position = 1)]
+        public string e164 { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public I18nData i18n_data { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SuggestedContactGroupHash
+    {
+        // Number of results to return from this group.
+        [ProtoMember(Position = 1)]
+        public long max_results { get; set; }
+
+        // A 4-byte hash.
+        [ProtoMember(Position = 2)]
+        public string hash { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SuggestedContact
+    {
+        [ProtoMember(Position = 1)]
+        public Entity entity { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public InvitationStatus invitation_status { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SuggestedContactGroup
+    {
+        [ProtoMember(Position = 1)]
+        public bool hash_matched { get; set; }
+
+        // A 4-byte hash.
+        [ProtoMember(Position = 2)]
+        public string hash { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public List<SuggestedContact> contact { get; set; }
+
+    }
+
+    // ----------------------------------------------------------------------------
+    // State Update and Notifications
+    // ----------------------------------------------------------------------------
+
+    // Pushed from the server to the client to notify it of state changes. Includes
+    // exactly one type of notification, and optionally updates the attributes of a
+    // conversation.
+    [ProtoContract]
+    internal class StateUpdate
+    {
+
+        [ProtoMember(Position = 1)]
+        public StateUpdateHeader state_update_header { get; set; }
+
+
+        // If set, includes conversation attributes that have been updated by the
+        // notification.
+        [ProtoMember(Position = 13)]
+        public Conversation conversation { get; set; }
+
+
+        [ProtoMember(Position = 3)]
+        public EventNotification event_notification { get; set; }
+        [ProtoMember(Position = 4)]
+        public SetFocusNotification focus_notification { get; set; }
+        [ProtoMember(Position = 5)]
+        public SetTypingNotification typing_notification { get; set; }
+        [ProtoMember(Position = 6)]
+        public SetConversationNotificationLevelNotification notification_level_notification { get; set; }
+        [ProtoMember(Position = 7)]
+        public ReplyToInviteNotification reply_to_invite_notification { get; set; }
+        [ProtoMember(Position = 8)]
+        public WatermarkNotification watermark_notification { get; set; }
+
+        //UnimplementedMessage unknown_1 = 9;
+        //UnimplementedMessage settings_notification = 10;
+
+        // TODO: rename to ViewModificationNotification?
+
+        [ProtoMember(Position = 11)]
+        public ConversationViewModification view_modification { get; set; }
+        [ProtoMember(Position = 12)]
+        public EasterEggNotification easter_egg_notification { get; set; }
+        [ProtoMember(Position = 14)]
+        public SelfPresenceNotification self_presence_notification { get; set; }
+        [ProtoMember(Position = 15)]
+        public DeleteActionNotification delete_notification { get; set; }
+        [ProtoMember(Position = 16)]
+        public PresenceNotification presence_notification { get; set; }
+        [ProtoMember(Position = 17)]
+        public BlockNotification block_notification { get; set; }
+
+        //UnimplementedMessage invitation_watermark_notification = 18;
+
+        [ProtoMember(Position = 19)]
+        public SetNotificationSettingNotification notification_setting_notification { get; set; }
+        [ProtoMember(Position = 20)]
+        public RichPresenceEnabledStateNotification rich_presence_enabled_state_notification { get; set; }
+    }
+
+    // Header for StateUpdate messages.
+    [ProtoContract]
+    internal class StateUpdateHeader
+    {
+        [ProtoMember(Position = 1)]
+        public ActiveClientState active_client_state { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public string request_trace_id { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public NotificationSettings notification_settings { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public long current_server_time { get; set; }
+
+
+        // TODO:
+        // unknown = 2
+        // archive settings? ([1]) = 6
+        // unknown = 7
+        // optional ID of the client causing the update (3767219427742586121) ? = 8
+    }
+
+    // List of StateUpdate messages to allow pushing multiple notifications from
+    // the server to the client simultaneously.
+    [ProtoContract]
+    internal class BatchUpdate
+    {
+        [ProtoMember(Position = 1)]
+        public List<StateUpdate> state_update { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class EventNotification
+    {
+        [ProtoMember(Position = 1)]
+        public Event current_event { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SetFocusNotification
+    {
+        [ProtoMember(Position = 1)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ParticipantId sender_id { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public long timestamp { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public FocusType type { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public FocusDevice device { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SetTypingNotification
+    {
+        [ProtoMember(Position = 1)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ParticipantId sender_id { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public long timestamp { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public TypingType type { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SetConversationNotificationLevelNotification
+    {
+        [ProtoMember(Position = 1)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public NotificationLevel level { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public long timestamp { get; set; }
+
+
+        // TODO:
+        // unknown (0) = 3;
+    }
+
+    [ProtoContract]
+    internal class ReplyToInviteNotification
+    {
+        [ProtoMember(Position = 1)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ReplyToInviteType type { get; set; }
+
+
+        // TODO: untested
+    }
+
+    [ProtoContract]
+    internal class WatermarkNotification
+    {
+        [ProtoMember(Position = 1)]
+        public ParticipantId sender_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public long latest_read_timestamp { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class ConversationViewModification
+    {
+        [ProtoMember(Position = 1)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ConversationView old_view { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public ConversationView new_view { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class EasterEggNotification
+    {
+        [ProtoMember(Position = 1)]
+        public ParticipantId sender_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public EasterEgg easter_egg { get; set; }
+
+    }
+
+    // Notifies the status of other clients and mood.
+    [ProtoContract]
+    internal class SelfPresenceNotification
+    {
+        [ProtoMember(Position = 1)]
+        public ClientPresenceState client_presence_state { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public DoNotDisturbSetting do_not_disturb_setting { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public DesktopOffSetting desktop_off_setting { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public DesktopOffState desktop_off_state { get; set; }
+
+        [ProtoMember(Position = 6)]
+        public MoodState mood_state { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class DeleteActionNotification
+    {
+        [ProtoMember(Position = 1)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public DeleteAction delete_action { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class PresenceNotification
+    {
+        [ProtoMember(Position = 1)]
+        public List<PresenceResult> presence { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class BlockNotification
+    {
+        [ProtoMember(Position = 1)]
+        public List<BlockStateChange> block_state_change { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SetNotificationSettingNotification
+    {
+        [ProtoMember(Position = 2)]
+        public DesktopSoundSetting desktop_sound_setting { get; set; }
+
+
+        // TODO
+        // convert text to emoji setting
+    }
+
+    [ProtoContract]
+    internal class RichPresenceEnabledStateNotification
+    {
+        [ProtoMember(Position = 1)]
+        public List<RichPresenceEnabledState> rich_presence_enabled_state { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class ConversationSpec
+    {
+        [ProtoMember(Position = 1)]
+        public ConversationId conversation_id { get; set; }
+
+
+        // TODO
+    }
+
+    // ----------------------------------------------------------------------------
+    // Requests & Responses
+    // ----------------------------------------------------------------------------
+
+    [ProtoContract]
+    internal class AddUserRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public List<InviteeID> invitee_id { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public EventRequestHeader event_request_header { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class AddUserResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public Event created_event { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class CreateConversationRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ConversationType type { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public long client_generated_id { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public string name { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public List<InviteeID> invitee_id { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class CreateConversationResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public Conversation conversation { get; set; }
+
+        [ProtoMember(Position = 7)]
+        public bool new_conversation_created { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class DeleteConversationRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public long delete_upper_bound_timestamp { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class DeleteConversationResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public DeleteAction delete_action { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class EasterEggRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public EasterEgg easter_egg { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class EasterEggResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public long timestamp { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class GetConversationRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ConversationSpec conversation_spec { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public bool include_event { get; set; }
+
+        [ProtoMember(Position = 6)]
+        public long max_events_per_conversation { get; set; }
+
+        [ProtoMember(Position = 7)]
+        public EventContinuationToken event_continuation_token { get; set; }
+
+
+        // TODO:
+        // include_conversation_metadata? = 3;
+        // unknown = 5;
+    }
+
+    [ProtoContract]
+    internal class GetConversationResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ConversationState conversation_state { get; set; }
+
+
+        // TODO
+    }
+
+    [ProtoContract]
+    internal class GetEntityByIdRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        // unknown = 2;
+        [ProtoMember(Position = 2)]
+        public object unknown1 { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public List<EntityLookupSpec> batch_lookup_spec { get; set; }
+
+
+        // TODO
+        [ProtoMember(Position = 4, Optional = true)]
+        public List<FieldMask> field_mask { get; set; }
+    }
+
+    [ProtoContract]
+    internal class GetEntityByIdResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public List<Entity> entity { get; set; }
+
+
+        // TODO
+    }
+
+    [ProtoContract]
+    internal class GetSuggestedEntitiesRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 8)]
+        public SuggestedContactGroupHash favorites { get; set; }
+
+        [ProtoMember(Position = 9)]
+        public SuggestedContactGroupHash contacts_you_hangout_with { get; set; }
+
+        [ProtoMember(Position = 10)]
+        public SuggestedContactGroupHash other_contacts_on_hangouts { get; set; }
+
+        [ProtoMember(Position = 11)]
+        public SuggestedContactGroupHash other_contacts { get; set; }
+
+        [ProtoMember(Position = 12)]
+        public SuggestedContactGroupHash dismissed_contacts { get; set; }
+
+        [ProtoMember(Position = 13)]
+        public SuggestedContactGroupHash pinned_favorites { get; set; }
+
+
+        // TODO: possible other fields:
+        // unknown bytes = 2;
+        // unknown bytes = 3;
+        // unknown int/enum = 4;
+        // unknown bool = 5;
+        //  [ProtoMember(Position=6)]
+        public List<ParticipantId> unknown { get; set; }
+
+        // unknown bool = 7;
+    }
+    // cgserp
+    [ProtoContract]
+    internal class GetSuggestedEntitiesResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public List<Entity> entity { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public SuggestedContactGroup favorites { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public SuggestedContactGroup contacts_you_hangout_with { get; set; }
+
+        [ProtoMember(Position = 6)]
+        public SuggestedContactGroup other_contacts_on_hangouts { get; set; }
+
+        [ProtoMember(Position = 7)]
+        public SuggestedContactGroup other_contacts { get; set; }
+
+        [ProtoMember(Position = 8)]
+        public SuggestedContactGroup dismissed_contacts { get; set; }
+
+        [ProtoMember(Position = 9)]
+        public SuggestedContactGroup pinned_favorites { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class GetSelfInfoRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+
+        // TODO
+    }
+
+    [ProtoContract]
+    internal class GetSelfInfoResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public Entity self_entity { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public bool is_known_minor { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public DoNotDisturbSetting dnd_state { get; set; }
+
+        [ProtoMember(Position = 6)]
+        public DesktopOffSetting desktop_off_setting { get; set; }
+
+        [ProtoMember(Position = 7)]
+        public PhoneData phone_data { get; set; }
+
+        [ProtoMember(Position = 8)]
+        public List<ConfigurationBit> configuration_bit { get; set; }
+
+        [ProtoMember(Position = 9)]
+        public DesktopOffState desktop_off_state { get; set; }
+
+        [ProtoMember(Position = 10)]
+        public bool google_plus_user { get; set; }
+
+        [ProtoMember(Position = 11)]
+        public DesktopSoundSetting desktop_sound_setting { get; set; }
+
+        [ProtoMember(Position = 12)]
+        public RichPresenceState rich_presence_state { get; set; }
+
+        [ProtoMember(Position = 19)]
+        public Country default_country { get; set; }
+
+
+        // TODO:
+        // client_presence? = 4;
+        // babel_user? = 13;
+        // desktop_availability_sharing_enabled? = 14;
+        // unknown = 16;
+        // bool google_plus_mobile_user = 15;
+        // unknown = 18;
+        // unknown = 22;
+    }
+
+    [ProtoContract]
+    internal class QueryPresenceRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public List<ParticipantId> participant_id { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public List<FieldMask> field_mask { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class QueryPresenceResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public List<PresenceResult> presence_result { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class RemoveUserRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public EventRequestHeader event_request_header { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class RemoveUserResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public Event created_event { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class RenameConversationRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public string new_name { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public EventRequestHeader event_request_header { get; set; }
+
+
+        // TODO
+    }
+
+    [ProtoContract]
+    internal class RenameConversationResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public Event created_event { get; set; }
+
+
+        // TODO: use json to check field names?
+    }
+
+    [ProtoContract]
+    internal class SearchEntitiesRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public string query { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public long max_count { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SearchEntitiesResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public List<Entity> entity { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SendChatMessageRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public object unknow2 { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public object unknow3 { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public object unknow4 { get; set; }
+
+        [ProtoMember(Position = 5)]
+        public List<EventAnnotation> annotation { get; set; }
+
+        [ProtoMember(Position = 6)]
+        public MessageContent message_content { get; set; }
+
+        [ProtoMember(Position = 7)]
+        public ExistingMedia existing_media { get; set; }
+
+        [ProtoMember(Position = 8)]
+        public EventRequestHeader event_request_header { get; set; }
+
+
+        // TODO: incomplete
+    }
+
+    [ProtoContract]
+    internal class SendChatMessageResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 6)]
+        public Event created_event { get; set; }
+
+
+        // TODO:
+        // unknown [] = 4;
+    }
+
+    [ProtoContract]
+    internal class SetActiveClientRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        // Whether to set the client as active or inactive.
+        [ProtoMember(Position = 2)]
+        public bool is_active { get; set; }
+
+        // 'email/resource'.
+        [ProtoMember(Position = 3)]
+        public string full_jid { get; set; }
+
+        // Timeout in seconds for client to remain active.
+        [ProtoMember(Position = 4)]
+        public long timeout_secs { get; set; }
+
+        [ProtoMember(Position = 5, Optional = true)]
+        public bool unknown { get; set; }
+        // TODO:
+        // unknown (true) = 5;
+    }
+
+    [ProtoContract]
+    internal class SetActiveClientResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SetConversationLevelRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+
+        // TODO: implement me
+    }
+
+    [ProtoContract]
+    internal class SetConversationLevelResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+
+        // TODO: implement me
+    }
+
+    [ProtoContract]
+    internal class SetConversationNotificationLevelRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public NotificationLevel level { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SetConversationNotificationLevelResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public long timestamp { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SetFocusRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public FocusType type { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public uint timeout_secs { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SetFocusResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public long timestamp { get; set; }
+
+    }
+
+    // Allows setting one or more of the included presence-related settings.
+    [ProtoContract]
+    internal class SetPresenceRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public PresenceStateSetting presence_state_setting { get; set; }
+
+        [ProtoMember(Position = 3, Optional = true)]
+        public DndSetting dnd_setting { get; set; }
+
+        [ProtoMember(Position = 5, Optional = true)]
+        public DesktopOffSetting desktop_off_setting { get; set; }
+
+        [ProtoMember(Position = 8, Optional = true)]
+        public MoodSetting mood_setting { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SetPresenceResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SetTypingRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public TypingType type { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SetTypingResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public long timestamp { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SyncAllNewEventsRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        // Timestamp after which to return all new events.
+        [ProtoMember(Position = 2)]
+        public long last_sync_timestamp { get; set; }
+
+        [ProtoMember(Position = 8)]
+        public long max_response_size_bytes { get; set; }
+
+
+        // TODO
+    }
+
+    [ProtoContract]
+    internal class SyncAllNewEventsResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public long sync_timestamp { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public List<ConversationState> conversation_state { get; set; }
+
+
+        // TODO
+    }
+
+    [ProtoContract]
+    internal class SyncRecentConversationsRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public long max_conversations { get; set; }
+
+        [ProtoMember(Position = 4)]
+        public long max_events_per_conversation { get; set; }
+
+        [ProtoMember(Position = 5)]
+        //        public List<SyncFilter> sync_filter { get; set; }
+        public SyncFilter sync_filter { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class SyncRecentConversationsResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public long sync_timestamp { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public List<ConversationState> conversation_state { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class UpdateWatermarkRequest
+    {
+        [ProtoMember(Position = 1)]
+        public RequestHeader request_header { get; set; }
+
+        [ProtoMember(Position = 2)]
+        public ConversationId conversation_id { get; set; }
+
+        [ProtoMember(Position = 3)]
+        public long last_read_timestamp { get; set; }
+
+    }
+
+    [ProtoContract]
+    internal class UpdateWatermarkResponse
+    {
+        [ProtoMember(Position = 1)]
+        public ResponseHeader response_header { get; set; }
+
+    }
+
     [ProtoContract]
     internal class ModifyOTRStatusRequest
     {
diff --git a/WTalk/Core/Schema/schema_generator.cs b/WTalk/Core/Schema/schema_generator.cs
deleted file mode 100644
index 720fb34..0000000
--- a/WTalk/Core/Schema/schema_generator.cs
+++ /dev/null
@@ -1,2155 +0,0 @@
-using System.Collections.Generic;
-namespace WTalk.Core.ProtoJson.Schema
-{
-    // proto2 is required because we need to be able to serialize default values:
-    // Describes which Hangouts client is active.
-    internal enum ActiveClientState : int
-    {
-        // No client is active.
-        ACTIVE_CLIENT_STATE_NO_ACTIVE = 0,
-        // This is the active client.
-        ACTIVE_CLIENT_STATE_IS_ACTIVE = 1,
-        // Other client is active.
-        ACTIVE_CLIENT_STATE_OTHER_ACTIVE = 2,
-    }
-
-    // The state of do-not-disturb mode. Not to be confused with DndSetting, which
-    // is used to change the state of do-not-disturb mode.
-    [ProtoContract]
-    internal class DoNotDisturbSetting
-    {
-        // Whether do-not-disturb mode is enabled.
-        [ProtoMember(Position = 1, Optional = true)]
-        public bool do_not_disturb { get; set; }
-        // Timestamp when do-not-disturb mode expires.
-        [ProtoMember(Position = 2, Optional = true)]
-        public long expiration_timestamp { get; set; }
-        // Timestamp when this setting was applied. Not present when this message
-        // comes from a notification.
-        [ProtoMember(Position = 3, Optional = true)]
-        public long version { get; set; }
-    }
-
-    [ProtoContract]
-    internal class NotificationSettings
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public DoNotDisturbSetting dnd_settings { get; set; }
-    }
-
-    internal enum FocusType : int
-    {
-        FOCUS_TYPE_UNKNOWN = 0,
-        FOCUS_TYPE_FOCUSED = 1,
-        FOCUS_TYPE_UNFOCUSED = 2,
-    }
-
-    internal enum FocusDevice : int
-    {
-        FOCUS_DEVICE_UNSPECIFIED = 0,
-        FOCUS_DEVICE_DESKTOP = 20,
-        FOCUS_DEVICE_MOBILE = 300,
-    }
-
-    // Identifies a conversation.
-    [ProtoContract]
-    internal class ConversationId
-    {
-        // Unique identifier for a conversation.
-        [ProtoMember(Position = 1, Optional = true)]
-        public string id { get; set; }
-    }
-
-    // Identifies a user.
-    [ProtoContract]
-    internal class ParticipantId
-    {
-        // Unique identifier for a user's Google account.
-        [ProtoMember(Position = 1, Optional = true)]
-        public string gaia_id { get; set; }
-        // Seems to always be the same as gaia_id.
-        [ProtoMember(Position = 2, Optional = true)]
-        public string chat_id { get; set; }
-    }
-
-    // Indicates whether Hangouts is active (running in the foreground) on
-    // different types of devices.
-    [ProtoContract]
-    internal class DeviceStatus
-    {
-        // True if a mobile phone is active.
-        [ProtoMember(Position = 1, Optional = true)]
-        public bool mobile { get; set; }
-        // True if a desktop or laptop is active.
-        [ProtoMember(Position = 2, Optional = true)]
-        public bool desktop { get; set; }
-        // True if a tablet is active.
-        [ProtoMember(Position = 3, Optional = true)]
-        public bool tablet { get; set; }
-    }
-
-    [ProtoContract]
-    internal class LastSeen
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public long last_seen_timestamp_usec { get; set; }
-    }
-
-    [ProtoContract]
-    internal class Presence
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public bool reachable { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public bool available { get; set; }
-        [ProtoMember(Position = 6, Optional = true)]
-        public DeviceStatus device_status { get; set; }
-        [ProtoMember(Position = 9, Optional = true)]
-        public MoodMessage mood_message { get; set; }
-        [ProtoMember(Position = 10, Optional = true)]
-        public LastSeen last_seen { get; set; }
-        // TODO:
-        // optional CallType call_type = 5;
-    }
-
-    [ProtoContract]
-    internal class PresenceResult
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ParticipantId user_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public Presence presence { get; set; }
-    }
-
-    internal enum TypingType : int
-    {
-        TYPING_TYPE_UNKNOWN = 0,
-        // Started typing.
-        TYPING_TYPE_STARTED = 1,
-        // Stopped typing with inputted text.
-        TYPING_TYPE_PAUSED = 2,
-        // Stopped typing with no inputted text.
-        TYPING_TYPE_STOPPED = 3,
-    }
-
-    [ProtoContract]
-    internal class ClientIdentifier
-    {
-        // (client_id in hangups).
-        [ProtoMember(Position = 1, Optional = true)]
-        public string resource { get; set; }
-        // unknown (header_id in hangups).
-        [ProtoMember(Position = 2, Optional = true)]
-        public string header_id { get; set; }
-    }
-
-    internal enum ClientPresenceStateType : int
-    {
-        CLIENT_PRESENCE_STATE_UNKNOWN = 0,
-        CLIENT_PRESENCE_STATE_NONE = 1,
-        CLIENT_PRESENCE_STATE_DESKTOP_IDLE = 30,
-        CLIENT_PRESENCE_STATE_DESKTOP_ACTIVE = 40,
-        // TODO
-    }
-
-    [ProtoContract]
-    internal class ClientPresenceState
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ClientIdentifier identifier { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ClientPresenceStateType state { get; set; }
-    }
-
-    internal enum NotificationLevel : int
-    {
-        NOTIFICATION_LEVEL_UNKNOWN = 0,
-        // Notifications are disabled.
-        NOTIFICATION_LEVEL_QUIET = 10,
-        // Notifications are enabled.
-        NOTIFICATION_LEVEL_RING = 30,
-    }
-
-    [ProtoContract]
-    internal class UserEventState
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ParticipantId user_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public string client_generated_id { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public NotificationLevel notification_level { get; set; }
-    }
-
-    internal enum SegmentType : int
-    {
-        // Segment is text.
-        SEGMENT_TYPE_TEXT = 0,
-        // Segment is a line break.
-        SEGMENT_TYPE_LINE_BREAK = 1,
-        // Segment is hyperlinked text.
-        SEGMENT_TYPE_LINK = 2,
-    }
-
-    [ProtoContract]
-    internal class Formatting
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public bool bold { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public bool italic { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public bool strikethrough { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public bool underline { get; set; }
-    }
-
-    [ProtoContract]
-    internal class LinkData
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public string link_target { get; set; }
-    }
-
-    // A segment of a message. Message are broken into segments that may be of
-    // different types and have different formatting.
-    [ProtoContract]
-    internal class Segment
-    {
-        // Note: This field is required because Hangouts for Chrome misbehaves if it
-        // isn't serialized.
-        [ProtoMember(Position = 1)]
-        public SegmentType type { get; set; }
-        // The segment text. For line breaks, may either be empty or contain new line
-        // character.
-        [ProtoMember(Position = 2, Optional = true)]
-        public string text { get; set; }
-        // Formatting for this segment.
-        [ProtoMember(Position = 3, Optional = true)]
-        public Formatting formatting { get; set; }
-        // Link data for this segment, if it is a link.
-        [ProtoMember(Position = 4, Optional = true)]
-        public LinkData link_data { get; set; }
-    }
-
-    // A type of embedded item.
-    internal enum ItemType : int
-    {
-        ITEM_TYPE_THING = 0,
-        // Google Plus photo.
-        ITEM_TYPE_PLUS_PHOTO = 249,
-        ITEM_TYPE_PLACE = 335,
-        // Google Map place.
-        ITEM_TYPE_PLACE_V2 = 340,
-    }
-
-    // Google Plus photo that can be embedded in a chat message.
-    [ProtoContract]
-    internal class PlusPhoto
-    {
-        // Metadata for displaying an image thumbnail.
-        [ProtoContract]
-        internal class Thumbnail
-        {
-            // URL to navigate to when thumbnail is selected (a Google Plus album
-            // page).
-            [ProtoMember(Position = 1, Optional = true)]
-            public string url { get; set; }
-            // URL of thumbnail image.
-            [ProtoMember(Position = 4, Optional = true)]
-            public string image_url { get; set; }
-            // Image width in pixels.
-            [ProtoMember(Position = 10, Optional = true)]
-            public long width_px { get; set; }
-            // Image height in pixels.
-            [ProtoMember(Position = 11, Optional = true)]
-            public long height_px { get; set; }
-        }
-
-        // Media type.
-        internal enum MediaType : int
-        {
-            MEDIA_TYPE_UNKNOWN = 0,
-            MEDIA_TYPE_PHOTO = 1,
-            MEDIA_TYPE_ANIMATED_PHOTO = 4,
-        }
-
-        // Thumbnail.
-        [ProtoMember(Position = 1, Optional = true)]
-        public Thumbnail thumbnail { get; set; }
-        // Owner obfuscated ID.
-        [ProtoMember(Position = 2, Optional = true)]
-        public string owner_obfuscated_id { get; set; }
-        // Album ID.
-        [ProtoMember(Position = 3, Optional = true)]
-        public string album_id { get; set; }
-        // Photo ID.
-        [ProtoMember(Position = 4, Optional = true)]
-        public string photo_id { get; set; }
-        // URL of full-sized image.
-        [ProtoMember(Position = 6, Optional = true)]
-        public string url { get; set; }
-        // URL of image thumbnail.
-        [ProtoMember(Position = 10, Optional = true)]
-        public string original_content_url { get; set; }
-        // The media type.
-        [ProtoMember(Position = 13, Optional = true)]
-        public MediaType media_type { get; set; }
-        // List of stream ID parameters.
-        public List<string> stream_id { get; set; }
-    }
-
-    // Place that can be embedded in a chat message via Google Maps.
-    [ProtoContract]
-    internal class Place
-    {
-        // Representative image of a place.
-        [ProtoContract]
-        internal class RepresentativeImage
-        {
-            // URL of image.
-            [ProtoMember(Position = 2, Optional = true)]
-            public string url { get; set; }
-        }
-
-        // Google Maps URL pointing to the map coordinates.
-        [ProtoMember(Position = 1, Optional = true)]
-        public string url { get; set; }
-        // Name of map location.
-        [ProtoMember(Position = 3, Optional = true)]
-        public string name { get; set; }
-        // Representative image of the place (map with pin).
-        [ProtoMember(Position = 185, Optional = true)]
-        public RepresentativeImage representative_image { get; set; }
-    }
-
-    // An item of some type embedded in a chat message.
-    [ProtoContract]
-    internal class EmbedItem
-    {
-        // List of embedded item types in this message.
-        public List<ItemType> type { get; set; }
-        // For photos this is not given, for maps, it's the URL of the map.
-        [ProtoMember(Position = 2, Optional = true)]
-        public string id { get; set; }
-        // Embedded Google Plus photo.
-        [ProtoMember(Position = 27639957, Optional = true)]
-        public PlusPhoto plus_photo { get; set; }
-        // Embedded Google Map of a place.
-        [ProtoMember(Position = 35825640, Optional = true)]
-        public Place place { get; set; }
-    }
-
-    // An attachment for a chat message.
-    [ProtoContract]
-    internal class Attachment
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public EmbedItem embed_item { get; set; }
-    }
-
-    // Chat message content.
-    [ProtoContract]
-    internal class MessageContent
-    {
-        public List<Segment> segment { get; set; }
-        public List<Attachment> attachment { get; set; }
-    }
-
-    // Annotation that can be applied to a chat message event. The only known use
-    // for this is "\me" actions supported by the Chrome client (type 4).
-    [ProtoContract]
-    internal class EventAnnotation
-    {
-        // Annotation type.
-        [ProtoMember(Position = 1, Optional = true)]
-        public int type { get; set; }
-        // Optional annotation string value.
-        [ProtoMember(Position = 2, Optional = true)]
-        public string value { get; set; }
-    }
-
-    // A chat message in a conversation.
-    [ProtoContract]
-    internal class ChatMessage
-    {
-        // Optional annotation to attach to message.
-        public List<EventAnnotation> annotation { get; set; }
-        // The message's content.
-        [ProtoMember(Position = 3, Optional = true)]
-        public MessageContent message_content { get; set; }
-        // TODO:
-        // always 0? = 1;
-    }
-
-    internal enum MembershipChangeType : int
-    {
-        MEMBERSHIP_CHANGE_TYPE_JOIN = 1,
-        MEMBERSHIP_CHANGE_TYPE_LEAVE = 2,
-    }
-
-    [ProtoContract]
-    internal class MembershipChange
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public MembershipChangeType type { get; set; }
-        public List<ParticipantId> participant_ids { get; set; }
-        // TODO:
-        // unknown [] = 2;
-        // leave_reason (4, 2) = 4;
-    }
-
-    [ProtoContract]
-    internal class ConversationRename
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public string new_name { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public string old_name { get; set; }
-    }
-
-    internal enum HangoutEventType : int
-    {
-        HANGOUT_EVENT_TYPE_UNKNOWN = 0,
-        HANGOUT_EVENT_TYPE_START = 1,
-        HANGOUT_EVENT_TYPE_END = 2,
-        HANGOUT_EVENT_TYPE_JOIN = 3,
-        HANGOUT_EVENT_TYPE_LEAVE = 4,
-        HANGOUT_EVENT_TYPE_COMING_SOON = 5,
-        HANGOUT_EVENT_TYPE_ONGOING = 6,
-    }
-
-    [ProtoContract]
-    internal class HangoutEvent
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public HangoutEventType event_type { get; set; }
-        public List<ParticipantId> participant_id { get; set; }
-        // TODO:
-        // media_type
-        // unknown 7 = 1;
-        // unknown 3 = 25;
-    }
-
-    [ProtoContract]
-    internal class OTRModification
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public OffTheRecordStatus old_otr_status { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public OffTheRecordStatus new_otr_status { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public OffTheRecordToggle old_otr_toggle { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public OffTheRecordToggle new_otr_toggle { get; set; }
-    }
-
-    // Whether the OTR toggle is available to the user.
-    internal enum OffTheRecordToggle : int
-    {
-        OFF_THE_RECORD_TOGGLE_UNKNOWN = 0,
-        OFF_THE_RECORD_TOGGLE_ENABLED = 1,
-        OFF_THE_RECORD_TOGGLE_DISABLED = 2,
-    }
-
-    internal enum OffTheRecordStatus : int
-    {
-        OFF_THE_RECORD_STATUS_UNKNOWN = 0,
-        // Conversation is off-the-record (history disabled).
-        OFF_THE_RECORD_STATUS_OFF_THE_RECORD = 1,
-        // Conversation is on-the-record (history enabled).
-        OFF_THE_RECORD_STATUS_ON_THE_RECORD = 2,
-    }
-
-    internal enum SourceType : int
-    {
-        SOURCE_TYPE_UNKNOWN = 0,
-    }
-
-    internal enum EventType : int
-    {
-        EVENT_TYPE_UNKNOWN = 0,
-        EVENT_TYPE_REGULAR_CHAT_MESSAGE = 1,
-        EVENT_TYPE_SMS = 2,
-        EVENT_TYPE_VOICEMAIL = 3,
-        EVENT_TYPE_ADD_USER = 4,
-        EVENT_TYPE_REMOVE_USER = 5,
-        EVENT_TYPE_CONVERSATION_RENAME = 6,
-        EVENT_TYPE_HANGOUT = 7,
-        EVENT_TYPE_PHONE_CALL = 8,
-        EVENT_TYPE_OTR_MODIFICATION = 9,
-        EVENT_TYPE_PLAN_MUTATION = 10,
-        EVENT_TYPE_MMS = 11,
-        EVENT_TYPE_DEPRECATED_12 = 12,
-    }
-
-    [ProtoContract]
-    internal class HashModifier
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public string update_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public long hash_diff { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public long version { get; set; }
-    }
-
-    // Event that becomes part of a conversation's history.
-    [ProtoContract]
-    internal class Event
-    {
-        // ID of the conversation this event belongs to.
-        [ProtoMember(Position = 1, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        // ID of the user that sent this event.
-        [ProtoMember(Position = 2, Optional = true)]
-        public ParticipantId sender_id { get; set; }
-        // Timestamp when the event occurred.
-        [ProtoMember(Position = 3, Optional = true)]
-        public long timestamp { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public UserEventState self_event_state { get; set; }
-        [ProtoMember(Position = 6, Optional = true)]
-        public SourceType source_type { get; set; }
-        [ProtoMember(Position = 7, Optional = true)]
-        public ChatMessage chat_message { get; set; }
-        [ProtoMember(Position = 9, Optional = true)]
-        public MembershipChange membership_change { get; set; }
-        [ProtoMember(Position = 10, Optional = true)]
-        public ConversationRename conversation_rename { get; set; }
-        [ProtoMember(Position = 11, Optional = true)]
-        public HangoutEvent hangout_event { get; set; }
-        // Unique ID for the event.
-        [ProtoMember(Position = 12, Optional = true)]
-        public string event_id { get; set; }
-        [ProtoMember(Position = 13, Optional = true)]
-        public long expiration_timestamp { get; set; }
-        [ProtoMember(Position = 14, Optional = true)]
-        public OTRModification otr_modification { get; set; }
-        [ProtoMember(Position = 15, Optional = true)]
-        public bool advances_sort_timestamp { get; set; }
-        [ProtoMember(Position = 16, Optional = true)]
-        public OffTheRecordStatus otr_status { get; set; }
-        [ProtoMember(Position = 17, Optional = true)]
-        public bool persisted { get; set; }
-        [ProtoMember(Position = 20, Optional = true)]
-        public DeliveryMedium medium_type { get; set; }
-        // The event's type.
-        [ProtoMember(Position = 23, Optional = true)]
-        public EventType event_type { get; set; }
-        // Event version timestamp.
-        [ProtoMember(Position = 24, Optional = true)]
-        public long event_version { get; set; }
-        [ProtoMember(Position = 26, Optional = true)]
-        public HashModifier hash_modifier { get; set; }
-    }
-
-    internal enum ConversationType : int
-    {
-        CONVERSATION_TYPE_UNKNOWN = 0,
-        // Conversation is one-to-one (only 2 participants).
-        CONVERSATION_TYPE_ONE_TO_ONE = 1,
-        // Conversation is group (any number of participants).
-        CONVERSATION_TYPE_GROUP = 2,
-    }
-
-    [ProtoContract]
-    internal class UserReadState
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ParticipantId participant_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public long latest_read_timestamp { get; set; }
-        // TODO: is latest_read_timestamp always 0?
-    }
-
-    internal enum ConversationStatus : int
-    {
-        CONVERSATION_STATUS_UNKNOWN = 0,
-        // User is invited to conversation.
-        CONVERSATION_STATUS_INVITED = 1,
-        // User is participating in conversation.
-        CONVERSATION_STATUS_ACTIVE = 2,
-        // User has left conversation.
-        CONVERSATION_STATUS_LEFT = 3,
-    }
-
-    internal enum ConversationView : int
-    {
-        CONVERSATION_VIEW_UNKNOWN = 0,
-        // Conversation is in inbox.
-        CONVERSATION_VIEW_INBOX = 1,
-        // Conversation has been archived.
-        CONVERSATION_VIEW_ARCHIVED = 2,
-    }
-
-    internal enum DeliveryMediumType : int
-    {
-        DELIVERY_MEDIUM_UNKNOWN = 0,
-        DELIVERY_MEDIUM_BABEL = 1,
-        DELIVERY_MEDIUM_GOOGLE_VOICE = 2,
-        DELIVERY_MEDIUM_LOCAL_SMS = 3,
-    }
-
-    [ProtoContract]
-    internal class DeliveryMedium
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public DeliveryMediumType medium_type { get; set; }
-        // Phone number to use for sending Google Voice messages.
-        [ProtoMember(Position = 2, Optional = true)]
-        public PhoneNumber phone_number { get; set; }
-    }
-
-    [ProtoContract]
-    internal class DeliveryMediumOption
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public DeliveryMedium delivery_medium { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public bool current_default { get; set; }
-    }
-
-    internal enum InvitationAffinity : int
-    {
-        INVITE_AFFINITY_UNKNOWN = 0,
-        INVITE_AFFINITY_HIGH = 1,
-        INVITE_AFFINITY_LOW = 2,
-    }
-
-    [ProtoContract]
-    internal class UserConversationState
-    {
-        [ProtoMember(Position = 2, Optional = true)]
-        public string client_generated_id { get; set; }
-        [ProtoMember(Position = 7, Optional = true)]
-        public UserReadState self_read_state { get; set; }
-        [ProtoMember(Position = 8, Optional = true)]
-        public ConversationStatus status { get; set; }
-        [ProtoMember(Position = 9, Optional = true)]
-        public NotificationLevel notification_level { get; set; }
-        public List<ConversationView> view { get; set; }
-        [ProtoMember(Position = 11, Optional = true)]
-        public ParticipantId inviter_id { get; set; }
-        [ProtoMember(Position = 12, Optional = true)]
-        public long invite_timestamp { get; set; }
-        [ProtoMember(Position = 13, Optional = true)]
-        public long sort_timestamp { get; set; }
-        [ProtoMember(Position = 14, Optional = true)]
-        public long active_timestamp { get; set; }
-        [ProtoMember(Position = 15, Optional = true)]
-        public InvitationAffinity invite_affinity { get; set; }
-        public List<DeliveryMediumOption> delivery_medium_option { get; set; }
-    }
-
-    internal enum ParticipantType : int
-    {
-        PARTICIPANT_TYPE_UNKNOWN = 0,
-        PARTICIPANT_TYPE_GAIA = 2,
-        PARTICIPANT_TYPE_GOOGLE_VOICE = 3,
-    }
-
-    internal enum InvitationStatus : int
-    {
-        INVITATION_STATUS_UNKNOWN = 0,
-        INVITATION_STATUS_PENDING = 1,
-        INVITATION_STATUS_ACCEPTED = 2,
-    }
-
-    [ProtoContract]
-    internal class ConversationParticipantData
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ParticipantId id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public string fallback_name { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public InvitationStatus invitation_status { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public ParticipantType participant_type { get; set; }
-        [ProtoMember(Position = 6, Optional = true)]
-        public InvitationStatus new_invitation_status { get; set; }
-    }
-
-    internal enum ForceHistory : int
-    {
-        FORCE_HISTORY_UNKNOWN = 0,
-        FORCE_HISTORY_NO = 1,
-    }
-
-    internal enum NetworkType : int
-    {
-        NETWORK_TYPE_UNKNOWN = 0,
-        NETWORK_TYPE_BABEL = 1,
-        NETWORK_TYPE_GOOGLE_VOICE = 2,
-    }
-
-    // A conversation between two or more users.
-    [ProtoContract]
-    internal class Conversation
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ConversationType type { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public string name { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public UserConversationState self_conversation_state { get; set; }
-        public List<UserReadState> read_state { get; set; }
-        // True if the conversation has an active Hangout.
-        [ProtoMember(Position = 9, Optional = true)]
-        public bool has_active_hangout { get; set; }
-        // The conversation's "off the record" status.
-        [ProtoMember(Position = 10, Optional = true)]
-        public OffTheRecordStatus otr_status { get; set; }
-        // Whether the OTR toggle is available to the user for this conversation.
-        [ProtoMember(Position = 11, Optional = true)]
-        public OffTheRecordToggle otr_toggle { get; set; }
-        [ProtoMember(Position = 12, Optional = true)]
-        public bool conversation_history_supported { get; set; }
-        public List<ParticipantId> current_participant { get; set; }
-        public List<ConversationParticipantData> participant_data { get; set; }
-        public List<NetworkType> network_type { get; set; }
-        [ProtoMember(Position = 19, Optional = true)]
-        public ForceHistory force_history_state { get; set; }
-    }
-
-    [ProtoContract]
-    internal class EasterEgg
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public string message { get; set; }
-    }
-
-    internal enum BlockState : int
-    {
-        BLOCK_STATE_UNKNOWN = 0,
-        BLOCK_STATE_BLOCK = 1,
-        BLOCK_STATE_UNBLOCK = 2,
-    }
-
-    [ProtoContract]
-    internal class BlockStateChange
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ParticipantId participant_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public BlockState new_block_state { get; set; }
-    }
-
-    internal enum ReplyToInviteType : int
-    {
-        REPLY_TO_INVITE_TYPE_UNKNOWN = 0,
-        REPLY_TO_INVITE_TYPE_ACCEPT = 1,
-        REPLY_TO_INVITE_TYPE_DECLINE = 2,
-    }
-
-    [ProtoContract]
-    internal class Photo
-    {
-        // Picasa photo ID.
-        [ProtoMember(Position = 1, Optional = true)]
-        public string photo_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public bool delete_albumless_source_photo { get; set; }
-        // Optional Picasa user ID needed for photos from other accounts (eg. stickers).
-        [ProtoMember(Position = 3, Optional = true)]
-        public string user_id { get; set; }
-        // Must be true if user_id is specified.
-        [ProtoMember(Position = 4, Optional = true)]
-        public bool is_custom_user_id { get; set; }
-        // TODO: test delete_albumless_source_photo
-        // TODO: verify name/behaviour of 'is_custom_user_id' field
-    }
-
-    [ProtoContract]
-    internal class ExistingMedia
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public Photo photo { get; set; }
-    }
-
-    [ProtoContract]
-    internal class EventRequestHeader
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public long client_generated_id { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public OffTheRecordStatus expected_otr { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public DeliveryMedium delivery_medium { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public EventType event_type { get; set; }
-    }
-
-    // Identifies the client.
-    internal enum ClientId : int
-    {
-        CLIENT_ID_UNKNOWN = 0,
-        // Hangouts app for Android.
-        CLIENT_ID_ANDROID = 1,
-        // Hangouts app for iOS.
-        CLIENT_ID_IOS = 2,
-        // Hangouts Chrome extension.
-        CLIENT_ID_CHROME = 3,
-        // Hangouts web interface in Google Plus.
-        CLIENT_ID_WEB_GPLUS = 5,
-        // Hangouts web interface in Gmail.
-        CLIENT_ID_WEB_GMAIL = 6,
-        // Hangouts Chrome app ("ultraviolet").
-        CLIENT_ID_ULTRAVIOLET = 13,
-    }
-
-    // Build type of the client.
-    internal enum ClientBuildType : int
-    {
-        BUILD_TYPE_UNKNOWN = 0,
-        // Web app.
-        BUILD_TYPE_PRODUCTION_WEB = 1,
-        // Native app.
-        BUILD_TYPE_PRODUCTION_APP = 3,
-    }
-
-    // The client and device version.
-    [ProtoContract]
-    internal class ClientVersion
-    {
-        // Identifies the client.
-        [ProtoMember(Position = 1, Optional = true)]
-        public ClientId client_id { get; set; }
-        // The client build type.
-        [ProtoMember(Position = 2, Optional = true)]
-        public ClientBuildType build_type { get; set; }
-        // Client version.
-        [ProtoMember(Position = 3, Optional = true)]
-        public string major_version { get; set; }
-        // Client version timestamp.
-        [ProtoMember(Position = 4, Optional = true)]
-        public long version_timestamp { get; set; }
-        // OS version string (for native apps).
-        [ProtoMember(Position = 5, Optional = true)]
-        public string device_os_version { get; set; }
-        // Device hardware name (for native apps).
-        [ProtoMember(Position = 6, Optional = true)]
-        public string device_hardware { get; set; }
-    }
-
-    // Header for requests from the client to the server.
-    [ProtoContract]
-    internal class RequestHeader
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ClientVersion client_version { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ClientIdentifier client_identifier { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public string language_code { get; set; }
-        // TODO: incomplete
-    }
-
-    // Status of the response from the server to the client.
-    internal enum ResponseStatus : int
-    {
-        RESPONSE_STATUS_UNKNOWN = 0,
-        RESPONSE_STATUS_OK = 1,
-        RESPONSE_STATUS_UNEXPECTED_ERROR = 3,
-        RESPONSE_STATUS_INVALID_REQUEST = 4,
-    }
-
-    // Header for responses from the server to the client.
-    [ProtoContract]
-    internal class ResponseHeader
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseStatus status { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public string error_description { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public string debug_url { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public string request_trace_id { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public long current_server_time { get; set; }
-    }
-
-    // A user that can participate in conversations.
-    [ProtoContract]
-    internal class Entity
-    {
-        // The user's ID.
-        [ProtoMember(Position = 9, Optional = true)]
-        public ParticipantId id { get; set; }
-        // Optional user presence status.
-        [ProtoMember(Position = 8, Optional = true)]
-        public Presence presence { get; set; }
-        // Optional user properties.
-        [ProtoMember(Position = 10, Optional = true)]
-        public EntityProperties properties { get; set; }
-        [ProtoMember(Position = 13, Optional = true)]
-        public ParticipantType entity_type { get; set; }
-        internal enum PastHangoutState : int
-        {
-            PAST_HANGOUT_STATE_UNKNOWN = 0,
-            PAST_HANGOUT_STATE_HAD_PAST_HANGOUT = 1,
-            PAST_HANGOUT_STATE_NO_PAST_HANGOUT = 2,
-        }
-
-        [ProtoMember(Position = 16, Optional = true)]
-        public PastHangoutState had_past_hangout_state { get; set; }
-        // TODO:
-        // unknown 1 = 15;
-        // unknown 2 = 17;
-    }
-
-    [ProtoContract]
-    internal class EntityProperties
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ProfileType type { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public string display_name { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public string first_name { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public string photo_url { get; set; }
-        public List<string> email { get; set; }
-        public List<string> phone { get; set; }
-        [ProtoMember(Position = 10, Optional = true)]
-        public bool in_users_domain { get; set; }
-        [ProtoMember(Position = 11, Optional = true)]
-        public Gender gender { get; set; }
-        [ProtoMember(Position = 12, Optional = true)]
-        public PhotoUrlStatus photo_url_status { get; set; }
-        [ProtoMember(Position = 15, Optional = true)]
-        public string canonical_email { get; set; }
-    }
-
-    // Status of EntityProperties.photo_url.
-    internal enum PhotoUrlStatus : int
-    {
-        PHOTO_URL_STATUS_UNKNOWN = 0,
-        // URL is a placeholder.
-        PHOTO_URL_STATUS_PLACEHOLDER = 1,
-        // URL is a photo set by the user.
-        PHOTO_URL_STATUS_USER_PHOTO = 2,
-    }
-
-    internal enum Gender : int
-    {
-        GENDER_UNKNOWN = 0,
-        GENDER_MALE = 1,
-        GENDER_FEMALE = 2,
-    }
-
-    internal enum ProfileType : int
-    {
-        PROFILE_TYPE_NONE = 0,
-        PROFILE_TYPE_ES_USER = 1,
-    }
-
-    // State of a conversation and recent events.
-    [ProtoContract]
-    internal class ConversationState
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public Conversation conversation { get; set; }
-        public List<Event> events { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public EventContinuationToken event_continuation_token { get; set; }
-    }
-
-    // Token that allows retrieving more events from a position in a conversation.
-    // Specifying event_timestamp is sufficient.
-    [ProtoContract]
-    internal class EventContinuationToken
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public string event_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public string storage_continuation_token { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public long event_timestamp { get; set; }
-    }
-
-    // Specifies an entity to lookup by one of its properties.
-    [ProtoContract]
-    internal class EntityLookupSpec
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public string gaia_id { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public string email { get; set; }
-        // TODO: do these work?
-        //optional string jid = 2,
-        //optional string phone = 4,
-        //optional string chat_id = 5,
-        // TODO
-        //optional bool unknown = 6,
-    }
-
-    // A type of binary configuration option.
-    internal enum ConfigurationBitType : int
-    {
-        // TODO
-        // RICH_PRESENCE_ACTIVITY_PROMO_SHOWN
-        // RICH_PRESENCE_DEVICE_PROMO_SHOWN
-        // RICH_PRESENCE_LAST_SEEN_DESKTOP_PROMO_SHOWN
-        // RICH_PRESENCE_LAST_SEEN_MOBILE_PROMO_SHOWN
-        // RICH_PRESENCE_IN_CALL_STATE_PROMO_SHOWN
-        // RICH_PRESENCE_MOOD_PROMO_SHOWN
-        // GV_SMS_INTEGRATION_PROMO_SHOWN
-        // RICH_PRESENCE_LAST_SEEN_DESKTOP_PROMPT_SHOWN
-        // BUSINESS_FEATURES_ENABLED
-        // BUSINESS_FEATURES_PROMO_DISMISSED
-        // CONVERSATION_INVITE_SETTINGS_SET_TO_CUSTOM
-        // REPORT_ABUSE_NOTICE_ACKNOWLEDGED
-        // PHONE_VERIFICATION_MOBILE_PROMPT_SHOWN
-        // HANGOUT_P2P_NOTICE_ACKNOWLEDGED
-        // HANGOUT_P2P_ENABLED
-        // INVITE_NOTIFICATIONS_ENABLED
-        // DESKTOP_AUTO_EMOJI_CONVERSION_ENABLED
-        // ALLOWED_FOR_DOMAIN
-        // GMAIL_CHAT_ARCHIVE_ENABLED
-        // QUASAR_MARKETING_PROMO_DISMISSED
-        // GPLUS_SIGNUP_PROMO_DISMISSED
-        // GPLUS_UPGRADE_ALLOWED_FOR_DOMAIN
-        // CHAT_WITH_CIRCLES_ACCEPTED
-        // CHAT_WITH_CIRCLES_PROMO_DISMISSED
-        // PHOTO_SERVICE_REGISTERED
-        // GV_SMS_INTEGRATION_ENABLED
-        // CAN_OPT_INTO_GV_SMS_INTEGRATION
-        // BUSINESS_FEATURES_ELIGIBLE
-        // CAN_USE_GV_CALLER_ID_FEATURE
-        CONFIGURATION_BIT_TYPE_UNKNOWN = 0,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_1 = 1,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_2 = 2,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_3 = 3,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_4 = 4,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_5 = 5,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_6 = 6,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_7 = 7,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_8 = 8,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_9 = 9,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_10 = 10,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_11 = 11,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_12 = 12,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_13 = 13,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_14 = 14,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_15 = 15,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_16 = 16,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_17 = 17,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_18 = 18,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_19 = 19,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_20 = 20,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_21 = 21,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_22 = 22,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_23 = 23,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_24 = 24,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_25 = 25,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_26 = 26,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_27 = 27,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_28 = 28,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_29 = 29,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_30 = 30,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_31 = 31,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_32 = 32,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_33 = 33,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_34 = 34,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_35 = 35,
-        CONFIGURATION_BIT_TYPE_UNKNOWN_36 = 36,
-    }
-
-    [ProtoContract]
-    internal class ConfigurationBit
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ConfigurationBitType configuration_bit_type { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public bool value { get; set; }
-    }
-
-    internal enum RichPresenceType : int
-    {
-        RICH_PRESENCE_TYPE_UNKNOWN = 0,
-        RICH_PRESENCE_TYPE_IN_CALL_STATE = 1,
-        // TODO
-        // RICH_PRESENCE_TYPE_GLOBALLY_ENABLED
-        // RICH_PRESENCE_TYPE_ACTIVITY
-        // RICH_PRESENCE_TYPE_MOOD
-        RICH_PRESENCE_TYPE_UNKNOWN_3 = 3,
-        RICH_PRESENCE_TYPE_UNKNOWN_4 = 4,
-        RICH_PRESENCE_TYPE_UNKNOWN_5 = 5,
-        RICH_PRESENCE_TYPE_DEVICE = 2,
-        RICH_PRESENCE_TYPE_LAST_SEEN = 6,
-    }
-
-    [ProtoContract]
-    internal class RichPresenceState
-    {
-        public List<RichPresenceEnabledState> get_rich_presence_enabled_state { get; set; }
-    }
-
-    [ProtoContract]
-    internal class RichPresenceEnabledState
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RichPresenceType type { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public bool enabled { get; set; }
-    }
-
-    internal enum FieldMask : int
-    {
-        FIELD_MASK_REACHABLE = 1,
-        FIELD_MASK_AVAILABLE = 2,
-        FIELD_MASK_MOOD = 3,
-        FIELD_MASK_IN_CALL = 6,
-        FIELD_MASK_DEVICE = 7,
-        FIELD_MASK_LAST_SEEN = 10,
-        // TODO: 3,4,8?
-    }
-
-    [ProtoContract]
-    internal class DesktopOffSetting
-    {
-        // State of "desktop off" setting.
-        [ProtoMember(Position = 1, Optional = true)]
-        public bool desktop_off { get; set; }
-    }
-
-    [ProtoContract]
-    internal class DesktopOffState
-    {
-        // Whether Hangouts desktop is signed off or on.
-        [ProtoMember(Position = 1, Optional = true)]
-        public bool desktop_off { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public long version { get; set; }
-    }
-
-    // Enable or disable do-not-disturb mode. Not to be confused with
-    // DoNotDisturbSetting, which is used to indicate the state of do-not-disturb
-    // mode.
-    [ProtoContract]
-    internal class DndSetting
-    {
-        // Whether to enable or disable do-not-disturb mode.
-        [ProtoMember(Position = 1, Optional = true)]
-        public bool do_not_disturb { get; set; }
-        // Do not disturb expiration in seconds.
-        [ProtoMember(Position = 2, Optional = true)]
-        public long timeout_secs { get; set; }
-    }
-
-    [ProtoContract]
-    internal class PresenceStateSetting
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public long timeout_secs { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ClientPresenceStateType type { get; set; }
-    }
-
-    [ProtoContract]
-    internal class MoodMessage
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public MoodContent mood_content { get; set; }
-    }
-
-    [ProtoContract]
-    internal class MoodContent
-    {
-        public List<Segment> segment { get; set; }
-    }
-
-    // The user's mood message.
-    [ProtoContract]
-    internal class MoodSetting
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public MoodMessage mood_message { get; set; }
-    }
-
-    [ProtoContract]
-    internal class MoodState
-    {
-        [ProtoMember(Position = 4, Optional = true)]
-        public MoodSetting mood_setting { get; set; }
-    }
-
-    internal enum DeleteType : int
-    {
-        DELETE_TYPE_UNKNOWN = 0,
-        DELETE_TYPE_UPPER_BOUND = 1,
-    }
-
-    [ProtoContract]
-    internal class DeleteAction
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public long delete_action_timestamp { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public long delete_upper_bound_timestamp { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public DeleteType delete_type { get; set; }
-    }
-
-    [ProtoContract]
-    internal class InviteeID
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public string gaia_id { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public string fallback_name { get; set; }
-    }
-
-    internal enum SyncFilter : int
-    {
-        SYNC_FILTER_UNKNOWN = 0,
-        SYNC_FILTER_INBOX = 1,
-        SYNC_FILTER_ARCHIVED = 2,
-        // TODO
-    }
-
-    // Describes a user's country.
-    [ProtoContract]
-    internal class Country
-    {
-        // Abbreviated region code (eg. "CA").
-        [ProtoMember(Position = 1, Optional = true)]
-        public string region_code { get; set; }
-        // Country's calling code (eg. "1").
-        [ProtoMember(Position = 2, Optional = true)]
-        public long country_code { get; set; }
-    }
-
-    internal enum SoundState : int
-    {
-        SOUND_STATE_UNKNOWN = 0,
-        SOUND_STATE_ON = 1,
-        SOUND_STATE_OFF = 2,
-    }
-
-    // Sound settings in the desktop Hangouts client.
-    [ProtoContract]
-    internal class DesktopSoundSetting
-    {
-        // Whether to play sound for incoming messages.
-        [ProtoMember(Position = 1, Optional = true)]
-        public SoundState desktop_sound_state { get; set; }
-        // Whether to ring for incoming calls.
-        [ProtoMember(Position = 2, Optional = true)]
-        public SoundState desktop_ring_sound_state { get; set; }
-    }
-
-    internal enum CallerIdSettingsMask : int
-    {
-        CALLER_ID_SETTINGS_MASK_UNKNOWN = 0,
-        CALLER_ID_SETTINGS_MASK_PROVIDED = 1,
-    }
-
-    [ProtoContract]
-    internal class PhoneData
-    {
-        public List<Phone> phone { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public CallerIdSettingsMask caller_id_settings_mask { get; set; }
-    }
-
-    internal enum PhoneVerificationStatus : int
-    {
-        PHONE_VERIFICATION_STATUS_UNKNOWN = 0,
-        PHONE_VERIFICATION_STATUS_VERIFIED = 1,
-    }
-
-    internal enum PhoneDiscoverabilityStatus : int
-    {
-        PHONE_DISCOVERABILITY_STATUS_UNKNOWN = 0,
-        PHONE_DISCOVERABILITY_STATUS_OPTED_IN_BUT_NOT_DISCOVERABLE = 2,
-    }
-
-    [ProtoContract]
-    internal class Phone
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public PhoneNumber phone_number { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public bool google_voice { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public PhoneVerificationStatus verification_status { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public bool discoverable { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public PhoneDiscoverabilityStatus discoverability_status { get; set; }
-        [ProtoMember(Position = 6, Optional = true)]
-        public bool primary { get; set; }
-    }
-
-    internal enum PhoneValidationResult : int
-    {
-        PHONE_VALIDATION_RESULT_IS_POSSIBLE = 0,
-    }
-
-    [ProtoContract]
-    internal class I18nData
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public string national_number { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public string international_number { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public long country_code { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public string region_code { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public bool is_valid { get; set; }
-        [ProtoMember(Position = 6, Optional = true)]
-        public PhoneValidationResult validation_result { get; set; }
-    }
-
-    [ProtoContract]
-    internal class PhoneNumber
-    {
-        // Phone number as string (eg. "+15551234567").
-        [ProtoMember(Position = 1, Optional = true)]
-        public string e164 { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public I18nData i18n_data { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SuggestedContactGroupHash
-    {
-        // Number of results to return from this group.
-        [ProtoMember(Position = 1, Optional = true)]
-        public long max_results { get; set; }
-        // An optional 4-byte hash. If this matches the server's hash, no results
-        // will be sent.
-        [ProtoMember(Position = 2, Optional = true)]
-        public string hash { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SuggestedContact
-    {
-        // The contact's entity.
-        [ProtoMember(Position = 1, Optional = true)]
-        public Entity entity { get; set; }
-        // The contact's invitation status.
-        [ProtoMember(Position = 2, Optional = true)]
-        public InvitationStatus invitation_status { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SuggestedContactGroup
-    {
-        // True if the request's hash matched and no contacts will be included.
-        [ProtoMember(Position = 1, Optional = true)]
-        public bool hash_matched { get; set; }
-        // A 4-byte hash which can be used in subsequent requests.
-        [ProtoMember(Position = 2, Optional = true)]
-        public string hash { get; set; }
-        // List of contacts in this group.
-        public List<SuggestedContact> contact { get; set; }
-    }
-
-    // ----------------------------------------------------------------------------
-    // State Update and Notifications
-    // ----------------------------------------------------------------------------
-    // Pushed from the server to the client to notify it of state changes. Includes
-    // exactly one type of notification, and optionally updates the attributes of a
-    // conversation.
-    [ProtoContract]
-    internal class StateUpdate
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public StateUpdateHeader state_update_header { get; set; }
-        // If set, includes conversation attributes that have been updated by the
-        // notification.
-        [ProtoMember(Position = 13, Optional = true)]
-        public Conversation conversation { get; set; }
-        [ProtoMember(Position = 2)]
-        public ConversationNotification conversation_notification { get; set; }
-        [ProtoMember(Position = 3)]
-        public EventNotification event_notification { get; set; }
-        [ProtoMember(Position = 4)]
-        public SetFocusNotification focus_notification { get; set; }
-        [ProtoMember(Position = 5)]
-        public SetTypingNotification typing_notification { get; set; }
-        [ProtoMember(Position = 6)]
-        public SetConversationNotificationLevelNotification notification_level_notification { get; set; }
-        [ProtoMember(Position = 7)]
-        public ReplyToInviteNotification reply_to_invite_notification { get; set; }
-        [ProtoMember(Position = 8)]
-        public WatermarkNotification watermark_notification { get; set; }
-        //UnimplementedMessage unknown_1 = 9,
-        //UnimplementedMessage settings_notification = 10,
-        // TODO: rename to ViewModificationNotification?
-        [ProtoMember(Position = 11)]
-        public ConversationViewModification view_modification { get; set; }
-        [ProtoMember(Position = 12)]
-        public EasterEggNotification easter_egg_notification { get; set; }
-        [ProtoMember(Position = 14)]
-        public SelfPresenceNotification self_presence_notification { get; set; }
-        [ProtoMember(Position = 15)]
-        public DeleteActionNotification delete_notification { get; set; }
-        [ProtoMember(Position = 16)]
-        public PresenceNotification presence_notification { get; set; }
-        [ProtoMember(Position = 17)]
-        public BlockNotification block_notification { get; set; }
-        //UnimplementedMessage invitation_watermark_notification = 18,
-        [ProtoMember(Position = 19)]
-        public SetNotificationSettingNotification notification_setting_notification { get; set; }
-        [ProtoMember(Position = 20)]
-        public RichPresenceEnabledStateNotification rich_presence_enabled_state_notification { get; set; }
-    }
-
-    // Header for StateUpdate messages.
-    [ProtoContract]
-    internal class StateUpdateHeader
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ActiveClientState active_client_state { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public string request_trace_id { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public NotificationSettings notification_settings { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public long current_server_time { get; set; }
-        // TODO:
-        // unknown = 2
-        // archive settings? ([1]) = 6
-        // unknown = 7
-        // optional ID of the client causing the update (3767219427742586121) ? = 8
-    }
-
-    // List of StateUpdate messages to allow pushing multiple notifications from
-    // the server to the client simultaneously.
-    [ProtoContract]
-    internal class BatchUpdate
-    {
-        public List<StateUpdate> state_update { get; set; }
-    }
-
-    [ProtoContract]
-    internal class ConversationNotification
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public Conversation conversation { get; set; }
-    }
-
-    [ProtoContract]
-    internal class EventNotification
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public Event current_event { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SetFocusNotification
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ParticipantId sender_id { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public long timestamp { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public FocusType type { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public FocusDevice device { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SetTypingNotification
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ParticipantId sender_id { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public long timestamp { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public TypingType type { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SetConversationNotificationLevelNotification
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public NotificationLevel level { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public long timestamp { get; set; }
-        // TODO:
-        // unknown (0) = 3;
-    }
-
-    [ProtoContract]
-    internal class ReplyToInviteNotification
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ReplyToInviteType type { get; set; }
-        // TODO: untested
-    }
-
-    [ProtoContract]
-    internal class WatermarkNotification
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ParticipantId sender_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public long latest_read_timestamp { get; set; }
-    }
-
-    [ProtoContract]
-    internal class ConversationViewModification
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ConversationView old_view { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public ConversationView new_view { get; set; }
-    }
-
-    [ProtoContract]
-    internal class EasterEggNotification
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ParticipantId sender_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public EasterEgg easter_egg { get; set; }
-    }
-
-    // Notifies the status of other clients and mood.
-    [ProtoContract]
-    internal class SelfPresenceNotification
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ClientPresenceState client_presence_state { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public DoNotDisturbSetting do_not_disturb_setting { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public DesktopOffSetting desktop_off_setting { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public DesktopOffState desktop_off_state { get; set; }
-        [ProtoMember(Position = 6, Optional = true)]
-        public MoodState mood_state { get; set; }
-    }
-
-    [ProtoContract]
-    internal class DeleteActionNotification
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public DeleteAction delete_action { get; set; }
-    }
-
-    [ProtoContract]
-    internal class PresenceNotification
-    {
-        public List<PresenceResult> presence { get; set; }
-    }
-
-    [ProtoContract]
-    internal class BlockNotification
-    {
-        public List<BlockStateChange> block_state_change { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SetNotificationSettingNotification
-    {
-        [ProtoMember(Position = 2, Optional = true)]
-        public DesktopSoundSetting desktop_sound_setting { get; set; }
-        // TODO
-        // convert text to emoji setting
-    }
-
-    [ProtoContract]
-    internal class RichPresenceEnabledStateNotification
-    {
-        public List<RichPresenceEnabledState> rich_presence_enabled_state { get; set; }
-    }
-
-    [ProtoContract]
-    internal class ConversationSpec
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        // TODO
-    }
-
-    internal enum OffnetworkAddressType : int
-    {
-        OFFNETWORK_ADDRESS_TYPE_UNKNOWN = 0,
-        OFFNETWORK_ADDRESS_TYPE_EMAIL = 1,
-    }
-
-    [ProtoContract]
-    internal class OffnetworkAddress
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public OffnetworkAddressType type { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public string email { get; set; }
-    }
-
-    // ----------------------------------------------------------------------------
-    // Requests & Responses
-    // ----------------------------------------------------------------------------
-    [ProtoContract]
-    internal class AddUserRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        public List<InviteeID> invitee_id { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public EventRequestHeader event_request_header { get; set; }
-    }
-
-    [ProtoContract]
-    internal class AddUserResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public Event created_event { get; set; }
-    }
-
-    [ProtoContract]
-    internal class CreateConversationRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ConversationType type { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public long client_generated_id { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public string name { get; set; }
-        public List<InviteeID> invitee_id { get; set; }
-    }
-
-    [ProtoContract]
-    internal class CreateConversationResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public Conversation conversation { get; set; }
-        [ProtoMember(Position = 7, Optional = true)]
-        public bool new_conversation_created { get; set; }
-    }
-
-    [ProtoContract]
-    internal class DeleteConversationRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public long delete_upper_bound_timestamp { get; set; }
-    }
-
-    [ProtoContract]
-    internal class DeleteConversationResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public DeleteAction delete_action { get; set; }
-    }
-
-    [ProtoContract]
-    internal class EasterEggRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public EasterEgg easter_egg { get; set; }
-    }
-
-    [ProtoContract]
-    internal class EasterEggResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public long timestamp { get; set; }
-    }
-
-    [ProtoContract]
-    internal class GetConversationRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ConversationSpec conversation_spec { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public bool include_event { get; set; }
-        [ProtoMember(Position = 6, Optional = true)]
-        public long max_events_per_conversation { get; set; }
-        [ProtoMember(Position = 7, Optional = true)]
-        public EventContinuationToken event_continuation_token { get; set; }
-        // TODO:
-        // include_conversation_metadata? = 3;
-        // unknown = 5;
-    }
-
-    [ProtoContract]
-    internal class GetConversationResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ConversationState conversation_state { get; set; }
-        // TODO
-    }
-
-    [ProtoContract]
-    internal class GetEntityByIdRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        public List<EntityLookupSpec> batch_lookup_spec { get; set; }
-        // TODO
-        // unknown = 2;
-    }
-
-    [ProtoContract]
-    internal class GetEntityByIdResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        public List<Entity> entity { get; set; }
-        // TODO
-    }
-
-    [ProtoContract]
-    internal class GetSuggestedEntitiesRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        // Max number of non-grouped entities to return.
-        [ProtoMember(Position = 4, Optional = true)]
-        public long max_count { get; set; }
-        // Optional hash for "favorites" contact group.
-        [ProtoMember(Position = 8, Optional = true)]
-        public SuggestedContactGroupHash favorites { get; set; }
-        // Optional hash for "contacts you hangout with" contact group.
-        [ProtoMember(Position = 9, Optional = true)]
-        public SuggestedContactGroupHash contacts_you_hangout_with { get; set; }
-        // Optional hash for "other contacts on hangouts" contact group.
-        [ProtoMember(Position = 10, Optional = true)]
-        public SuggestedContactGroupHash other_contacts_on_hangouts { get; set; }
-        // Optional hash for "other contacts" contact group.
-        [ProtoMember(Position = 11, Optional = true)]
-        public SuggestedContactGroupHash other_contacts { get; set; }
-        // Optional hash for "dismissed contacts" contact group.
-        [ProtoMember(Position = 12, Optional = true)]
-        public SuggestedContactGroupHash dismissed_contacts { get; set; }
-        // Optional hash for "pinned favorites" contact group.
-        [ProtoMember(Position = 13, Optional = true)]
-        public SuggestedContactGroupHash pinned_favorites { get; set; }
-        // TODO: possible other fields:
-        // repeated EntityID given_entity_id = 2
-        // repeated EntityFilterType entity_type_filter = 3;
-        // optional bool include_availability = 5;
-        // repeated ParticipantId given_entity_id = 6
-        // unknown bool = 7;
-        // unknown bool = 14;
-        // unknown repeated int = 15;
-    }
-
-    [ProtoContract]
-    internal class GetSuggestedEntitiesResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        public List<Entity> entity { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public SuggestedContactGroup favorites { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public SuggestedContactGroup contacts_you_hangout_with { get; set; }
-        [ProtoMember(Position = 6, Optional = true)]
-        public SuggestedContactGroup other_contacts_on_hangouts { get; set; }
-        [ProtoMember(Position = 7, Optional = true)]
-        public SuggestedContactGroup other_contacts { get; set; }
-        [ProtoMember(Position = 8, Optional = true)]
-        public SuggestedContactGroup dismissed_contacts { get; set; }
-        [ProtoMember(Position = 9, Optional = true)]
-        public SuggestedContactGroup pinned_favorites { get; set; }
-    }
-
-    [ProtoContract]
-    internal class GetSelfInfoRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        // TODO
-    }
-
-    [ProtoContract]
-    internal class GetSelfInfoResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public Entity self_entity { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public bool is_known_minor { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public DoNotDisturbSetting dnd_state { get; set; }
-        [ProtoMember(Position = 6, Optional = true)]
-        public DesktopOffSetting desktop_off_setting { get; set; }
-        [ProtoMember(Position = 7, Optional = true)]
-        public PhoneData phone_data { get; set; }
-        public List<ConfigurationBit> configuration_bit { get; set; }
-        [ProtoMember(Position = 9, Optional = true)]
-        public DesktopOffState desktop_off_state { get; set; }
-        [ProtoMember(Position = 10, Optional = true)]
-        public bool google_plus_user { get; set; }
-        [ProtoMember(Position = 11, Optional = true)]
-        public DesktopSoundSetting desktop_sound_setting { get; set; }
-        [ProtoMember(Position = 12, Optional = true)]
-        public RichPresenceState rich_presence_state { get; set; }
-        [ProtoMember(Position = 19, Optional = true)]
-        public Country default_country { get; set; }
-        // TODO:
-        // client_presence? = 4;
-        // babel_user? = 13;
-        // desktop_availability_sharing_enabled? = 14;
-        // unknown = 16;
-        // bool google_plus_mobile_user = 15;
-        // unknown = 18;
-        // unknown = 22;
-    }
-
-    [ProtoContract]
-    internal class QueryPresenceRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        public List<ParticipantId> participant_id { get; set; }
-        public List<FieldMask> field_mask { get; set; }
-    }
-
-    [ProtoContract]
-    internal class QueryPresenceResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        public List<PresenceResult> presence_result { get; set; }
-    }
-
-    [ProtoContract]
-    internal class RemoveUserRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public EventRequestHeader event_request_header { get; set; }
-    }
-
-    [ProtoContract]
-    internal class RemoveUserResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public Event created_event { get; set; }
-    }
-
-    [ProtoContract]
-    internal class RenameConversationRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public string new_name { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public EventRequestHeader event_request_header { get; set; }
-        // TODO
-    }
-
-    [ProtoContract]
-    internal class RenameConversationResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public Event created_event { get; set; }
-        // TODO: use json to check field names?
-    }
-
-    [ProtoContract]
-    internal class SearchEntitiesRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public string query { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public long max_count { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SearchEntitiesResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        public List<Entity> entity { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SendChatMessageRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        public List<EventAnnotation> annotation { get; set; }
-        [ProtoMember(Position = 6, Optional = true)]
-        public MessageContent message_content { get; set; }
-        [ProtoMember(Position = 7, Optional = true)]
-        public ExistingMedia existing_media { get; set; }
-        [ProtoMember(Position = 8, Optional = true)]
-        public EventRequestHeader event_request_header { get; set; }
-        // TODO: incomplete
-    }
-
-    [ProtoContract]
-    internal class SendChatMessageResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 6, Optional = true)]
-        public Event created_event { get; set; }
-        // TODO:
-        // unknown [] = 4;
-    }
-
-    [ProtoContract]
-    internal class SendOffnetworkInvitationRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public OffnetworkAddress invitee_address { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SendOffnetworkInvitationResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SetActiveClientRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        // Whether to set the client as active or inactive.
-        [ProtoMember(Position = 2, Optional = true)]
-        public bool is_active { get; set; }
-        // 'email/resource'.
-        [ProtoMember(Position = 3, Optional = true)]
-        public string full_jid { get; set; }
-        // Timeout in seconds for client to remain active.
-        [ProtoMember(Position = 4, Optional = true)]
-        public long timeout_secs { get; set; }
-        // TODO:
-        // unknown (true) = 5;
-    }
-
-    [ProtoContract]
-    internal class SetActiveClientResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SetConversationLevelRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        // TODO: implement me
-    }
-
-    [ProtoContract]
-    internal class SetConversationLevelResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        // TODO: implement me
-    }
-
-    [ProtoContract]
-    internal class SetConversationNotificationLevelRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public NotificationLevel level { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SetConversationNotificationLevelResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public long timestamp { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SetFocusRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public FocusType type { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public uint timeout_secs { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SetFocusResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public long timestamp { get; set; }
-    }
-
-    // Allows setting one or more of the included presence-related settings.
-    [ProtoContract]
-    internal class SetPresenceRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public PresenceStateSetting presence_state_setting { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public DndSetting dnd_setting { get; set; }
-        [ProtoMember(Position = 5, Optional = true)]
-        public DesktopOffSetting desktop_off_setting { get; set; }
-        [ProtoMember(Position = 8, Optional = true)]
-        public MoodSetting mood_setting { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SetPresenceResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SetTypingRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public TypingType type { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SetTypingResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public long timestamp { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SyncAllNewEventsRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        // Timestamp after which to return all new events.
-        [ProtoMember(Position = 2, Optional = true)]
-        public long last_sync_timestamp { get; set; }
-        [ProtoMember(Position = 8, Optional = true)]
-        public long max_response_size_bytes { get; set; }
-        // TODO
-    }
-
-    [ProtoContract]
-    internal class SyncAllNewEventsResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public long sync_timestamp { get; set; }
-        public List<ConversationState> conversation_state { get; set; }
-        // TODO
-    }
-
-    [ProtoContract]
-    internal class SyncRecentConversationsRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public long max_conversations { get; set; }
-        [ProtoMember(Position = 4, Optional = true)]
-        public long max_events_per_conversation { get; set; }
-        public List<SyncFilter> sync_filter { get; set; }
-    }
-
-    [ProtoContract]
-    internal class SyncRecentConversationsResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public long sync_timestamp { get; set; }
-        public List<ConversationState> conversation_state { get; set; }
-    }
-
-    [ProtoContract]
-    internal class UpdateWatermarkRequest
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public RequestHeader request_header { get; set; }
-        [ProtoMember(Position = 2, Optional = true)]
-        public ConversationId conversation_id { get; set; }
-        [ProtoMember(Position = 3, Optional = true)]
-        public long last_read_timestamp { get; set; }
-    }
-
-    [ProtoContract]
-    internal class UpdateWatermarkResponse
-    {
-        [ProtoMember(Position = 1, Optional = true)]
-        public ResponseHeader response_header { get; set; }
-    }
-
-}
diff --git a/WTalk/WTalk.csproj b/WTalk/WTalk.csproj
index df44a11..cba6926 100644
--- a/WTalk/WTalk.csproj
+++ b/WTalk/WTalk.csproj
@@ -52,11 +52,6 @@
     <Compile Include="Core\ProtoJson\Schema.cs" />
     <Compile Include="Core\Reflection\CompiledPropertyAccessor.cs" />
     <Compile Include="Core\Reflection\ProtoJsonPropertyAccessor.cs" />
-    <Compile Include="Core\Schema\schema_generator.cs">
-      <AutoGen>True</AutoGen>
-      <DesignTime>True</DesignTime>
-      <DependentUpon>schema_generator.tt</DependentUpon>
-    </Compile>
     <Compile Include="Core\Utils\DateTimeExtension.cs" />
     <Compile Include="Core\Utils\HttpClientExtention.cs" />
     <Compile Include="Core\Utils\FileCache.cs" />