diff --git a/.idea/dataSources.xml b/.idea/dataSources.xml
index 1960207..1aa95aa 100644
--- a/.idea/dataSources.xml
+++ b/.idea/dataSources.xml
@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
-    <data-source source="LOCAL" name="test" uuid="c31e2821-78f4-457d-a96f-a4f0fc76708c">
+    <data-source source="LOCAL" name="dev" uuid="264a9472-6fd0-4fcc-8354-d6d121fc5bba">
       <driver-ref>sqlite.xerial</driver-ref>
       <synchronize>true</synchronize>
       <jdbc-driver>org.sqlite.JDBC</jdbc-driver>
-      <jdbc-url>jdbc:sqlite:D:\source\PyCharm\v25\test.db</jdbc-url>
+      <jdbc-url>jdbc:sqlite:$PROJECT_DIR$\dev.db</jdbc-url>
       <libraries>
         <library>
           <url>file://$APPLICATION_CONFIG_DIR$/jdbc-drivers/Xerial SQLiteJDBC/3.31.1/license.txt</url>
diff --git a/config.json b/config.json
index 9d3a757..a2e0b91 100644
--- a/config.json
+++ b/config.json
@@ -2,7 +2,8 @@
   "db": "sqlite:///dev.db",
   "subjects": {
     "ro6ncuJxA_cGQ51hPKw11Q84of08j7GtOjL0Xr5GaFs=": {
-      "allowed": null
+      "allowed": null,
+      "contacts": null
     }
   }
 }
diff --git a/v25/storage/dbstorage.py b/v25/storage/dbstorage.py
index 564d999..ccfc4e6 100644
--- a/v25/storage/dbstorage.py
+++ b/v25/storage/dbstorage.py
@@ -2,7 +2,8 @@ import json
 from typing import Tuple, Optional, Iterable
 
 from nacl.bindings import crypto_sign_PUBLICKEYBYTES
-from sqlalchemy import create_engine, LargeBinary, Column, REAL, BLOB, String, or_, and_, ForeignKeyConstraint, Integer
+from sqlalchemy import create_engine, LargeBinary, Column, REAL, BLOB, String, or_, and_, ForeignKeyConstraint, \
+    Integer, UniqueConstraint
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import sessionmaker, Query
 
@@ -16,7 +17,7 @@ Base = declarative_base()
 
 class SSSJ(Base):
     """Subject Status Storage JSON"""
-    __tablename__ = 'ssse'
+    __tablename__ = 'sssj'
 
     subject = Column(LargeBinary(crypto_sign_PUBLICKEYBYTES), primary_key=True)
     status = Column(String, nullable=False, default='{}')
@@ -34,17 +35,18 @@ class Msg(Base):
     __tablename__ = 'msgs'
 
     oid = Column(Integer, autoincrement=True, primary_key=True)
-    sf = Column(LargeBinary(crypto_sign_PUBLICKEYBYTES))
-    st = Column(LargeBinary(crypto_sign_PUBLICKEYBYTES))
-    idn = Column(LargeBinary(NONCE_SIZE))
+    sf = Column(LargeBinary(crypto_sign_PUBLICKEYBYTES), index=True)
+    st = Column(LargeBinary(crypto_sign_PUBLICKEYBYTES), index=True)
+    idn = Column(LargeBinary(NONCE_SIZE), index=True)
     ts = Column(REAL, nullable=False, index=True)
-    en = Column(LargeBinary(NONCE_SIZE), nullable=False)
+    en = Column(LargeBinary(NONCE_SIZE), nullable=False, index=True)
     ec = Column(BLOB, nullable=False)
     flags = Column(String, nullable=False)
 
     __table_args__ = (ForeignKeyConstraint((sf, st, idn,),
                                            (MsgSgn.sf, MsgSgn.st, MsgSgn.idn,),
                                            ),
+                      UniqueConstraint(sf, st, idn, ),
                       )
 
     def sgn(self):
@@ -78,6 +80,17 @@ class DBStorage(AbstractStorage):
     def check(self, subject: Subject) -> dict:
         session = self.Session()
         status = json.loads(session.query(SSSJ).filter_by(subject=subject.vkey.encode()).one_or_none().status) or {}
+        if 'contacts' in status:
+            query: Query = session.query(Msg).filter(or_(
+                Msg.sf == subject.vkey.encode(),
+                Msg.st == subject.vkey.encode(),
+            ))
+            query = query.with_entities(Msg.sf, Msg.st)
+            contacts = set()
+            for sf, st in query:
+                contacts.add(sf)
+                contacts.add(st)
+            status['contacts'] = list(map(Encoding.encode, contacts))
         session.close()
         return status