Make DbKey required to construct SqliteConnectionSafe.

benchmark/bench_db.cpp

@@ -188,7 +188,7 @@ class SqliteKeyValueAsyncBench final : public td::Benchmark {
     td::string sql_db_name = "testdb.sqlite";
     td::SqliteDb::destroy(sql_db_name).ignore();
 
-    sql_connection_ = std::make_shared<td::SqliteConnectionSafe>(sql_db_name);
+    sql_connection_ = std::make_shared<td::SqliteConnectionSafe>(sql_db_name, td::DbKey::empty());
     auto &db = sql_connection_->get();
     TRY_STATUS(init_db(db));
 

benchmark/bench_tddb.cpp

@@ -94,7 +94,7 @@ class MessagesDbBench final : public Benchmark {
     auto guard = scheduler_->get_main_guard();
 
     string sql_db_name = "testdb.sqlite";
-    sql_connection_ = std::make_shared<SqliteConnectionSafe>(sql_db_name);
+    sql_connection_ = std::make_shared<SqliteConnectionSafe>(sql_db_name, DbKey::empty());
     auto &db = sql_connection_->get();
     TRY_STATUS(init_db(db));
 

tddb/td/db/SqliteConnectionSafe.h

@@ -19,7 +19,7 @@ namespace td {
 class SqliteConnectionSafe {
  public:
   SqliteConnectionSafe() = default;
-  explicit SqliteConnectionSafe(string path, DbKey key = DbKey::empty(), optional<int32> cipher_version = {});
+  SqliteConnectionSafe(string path, DbKey key, optional<int32> cipher_version = {});
 
   SqliteDb &get();
   void set(SqliteDb &&db);

test/db.cpp

@@ -305,7 +305,7 @@ class SqliteKV {
     return 0;
   }
   Status init(string name) {
-    auto sql_connection = std::make_shared<SqliteConnectionSafe>(name);
+    auto sql_connection = std::make_shared<SqliteConnectionSafe>(name, DbKey::empty());
     kv_ = std::make_shared<SqliteKeyValueSafe>("kv", sql_connection);
     return Status::OK();
   }