diff --git a/td/telegram/net/AuthDataShared.cpp b/td/telegram/net/AuthDataShared.cpp
index 81e013dcc..0939d512b 100644
--- a/td/telegram/net/AuthDataShared.cpp
+++ b/td/telegram/net/AuthDataShared.cpp
@@ -34,8 +34,8 @@ class AuthDataSharedImpl final : public AuthDataShared {
     return public_rsa_key_;
   }
 
-  mtproto::AuthKey get_auth_key() final {
-    string dc_key = G()->td_db()->get_binlog_pmc()->get(auth_key_key());
+  static mtproto::AuthKey get_auth_key_for_dc(DcId dc_id) {
+    string dc_key = G()->td_db()->get_binlog_pmc()->get(get_auth_key_binlog_key(dc_id));
 
     mtproto::AuthKey res;
     if (!dc_key.empty()) {
@@ -44,8 +44,12 @@ class AuthDataSharedImpl final : public AuthDataShared {
     return res;
   }
 
+  mtproto::AuthKey get_auth_key() final {
+    return get_auth_key_for_dc(dc_id_);
+  }
+
   void set_auth_key(const mtproto::AuthKey &auth_key) final {
-    G()->td_db()->get_binlog_pmc()->set(auth_key_key(), serialize(auth_key));
+    G()->td_db()->get_binlog_pmc()->set(get_auth_key_binlog_key(dc_id_), serialize(auth_key));
     log_auth_key(auth_key);
 
     notify();
@@ -69,11 +73,11 @@ class AuthDataSharedImpl final : public AuthDataShared {
   }
 
   void set_future_salts(const std::vector<mtproto::ServerSalt> &future_salts) final {
-    G()->td_db()->get_binlog_pmc()->set(future_salts_key(), serialize(future_salts));
+    G()->td_db()->get_binlog_pmc()->set(get_future_salts_binlog_key(dc_id_), serialize(future_salts));
   }
 
   std::vector<mtproto::ServerSalt> get_future_salts() final {
-    string future_salts = G()->td_db()->get_binlog_pmc()->get(future_salts_key());
+    string future_salts = G()->td_db()->get_binlog_pmc()->get(get_future_salts_binlog_key(dc_id_));
     std::vector<mtproto::ServerSalt> res;
     if (!future_salts.empty()) {
       unserialize(res, future_salts).ensure();
@@ -88,11 +92,12 @@ class AuthDataSharedImpl final : public AuthDataShared {
   std::shared_ptr<Guard> guard_;
   RwMutex rw_mutex_;
 
-  string auth_key_key() const {
-    return PSTRING() << "auth" << dc_id_.get_raw_id();
+  static string get_auth_key_binlog_key(DcId dc_id) {
+    return PSTRING() << "auth" << dc_id.get_raw_id();
   }
-  string future_salts_key() const {
-    return PSTRING() << "salt" << dc_id_.get_raw_id();
+
+  static string get_future_salts_binlog_key(DcId dc_id) {
+    return PSTRING() << "salt" << dc_id.get_raw_id();
   }
 
   void notify() {
@@ -114,6 +119,10 @@ class AuthDataSharedImpl final : public AuthDataShared {
   }
 };
 
+mtproto::AuthKey AuthDataShared::get_auth_key_for_dc(DcId dc_id) {
+  return AuthDataSharedImpl::get_auth_key_for_dc(dc_id);
+}
+
 std::shared_ptr<AuthDataShared> AuthDataShared::create(DcId dc_id, std::shared_ptr<PublicRsaKeyShared> public_rsa_key,
                                                        std::shared_ptr<Guard> guard) {
   return std::make_shared<AuthDataSharedImpl>(dc_id, std::move(public_rsa_key), std::move(guard));
diff --git a/td/telegram/net/AuthDataShared.h b/td/telegram/net/AuthDataShared.h
index 022909315..570e55bcc 100644
--- a/td/telegram/net/AuthDataShared.h
+++ b/td/telegram/net/AuthDataShared.h
@@ -43,6 +43,8 @@ class AuthDataShared {
   virtual void set_future_salts(const std::vector<mtproto::ServerSalt> &future_salts) = 0;
   virtual std::vector<mtproto::ServerSalt> get_future_salts() = 0;
 
+  static mtproto::AuthKey get_auth_key_for_dc(DcId dc_id);
+
   static std::shared_ptr<AuthDataShared> create(DcId dc_id, std::shared_ptr<PublicRsaKeyShared> public_rsa_key,
                                                 std::shared_ptr<Guard> guard);
 };