diff --git a/sylk/applications/webrtcgateway/models/storage/cassandra.py b/sylk/applications/webrtcgateway/models/storage/cassandra.py
index b25d1ee..f7ec6aa 100644
--- a/sylk/applications/webrtcgateway/models/storage/cassandra.py
+++ b/sylk/applications/webrtcgateway/models/storage/cassandra.py
@@ -1,16 +1,53 @@
 
 from cassandra.cqlengine import columns
 from cassandra.cqlengine.models import Model
 
 
 class PushTokens(Model):
     __table_name__   = 'push_tokens'
     username         = columns.Text(partition_key=True)
     domain           = columns.Text(partition_key=True)
     device_id        = columns.Text(primary_key=True)
     app_id           = columns.Text(primary_key=True)
     background_token = columns.Text(required=False)
     device_token     = columns.Text()
     platform         = columns.Text()
     silent           = columns.Text()
     user_agent       = columns.Text(required=False)
+
+
+class ChatMessage(Model):
+    __table_name__  = 'chat_messages_by_timestamp'
+    __options__     = {'default_time_to_live': '31536000',
+                        'gc_grace_seconds': '345600'}
+    account         = columns.Text(partition_key=True)
+    contact         = columns.Text()
+    created_at      = columns.DateTime(primary_key=True)
+    direction       = columns.Text()
+    message_id      = columns.Text(primary_key=True)
+    content         = columns.Text()
+    content_type    = columns.Text()
+    disposition     = columns.List(value_type=columns.Text, required=False)
+    state           = columns.Text()
+    msg_timestamp   = columns.DateTime()
+
+
+class ChatMessageIdMapping(Model):
+    __table_name__  = 'chat_message_created_at_by_id'
+    __options__     = {'default_time_to_live': '31536000',
+                        'gc_grace_seconds': '345600'}
+    message_id      = columns.Text(partition_key=True)
+    created_at      = columns.DateTime()
+
+
+class PublicKey(Model):
+    __table_name__   = 'public_key_by_account'
+    public_key       = columns.Text()
+    account          = columns.Text(partition_key=True)
+
+
+class ChatAccount(Model):
+    __table_name__   = 'chat_accounts'
+    account          = columns.Text(partition_key=True)
+    api_token        = columns.Text()
+    last_login       = columns.DateTime()