diff --git a/contribution/config.ini b/contribution/config.ini
index 8ec027a078..a83e2384d1 100644
--- a/contribution/config.ini
+++ b/contribution/config.ini
@@ -111,3 +111,6 @@ appenders=stderr
 [logger.p2p]
 level=info
 appenders=stderr
+
+# Mongo db connection string
+mongodb-uri=mongodb://127.0.0.1:27017
diff --git a/libraries/plugins/mongo_db/include/golos/plugins/mongo_db/mongo_db_writer.hpp b/libraries/plugins/mongo_db/include/golos/plugins/mongo_db/mongo_db_writer.hpp
index 6ba0dd6b5d..128d7e08f4 100644
--- a/libraries/plugins/mongo_db/include/golos/plugins/mongo_db/mongo_db_writer.hpp
+++ b/libraries/plugins/mongo_db/include/golos/plugins/mongo_db/mongo_db_writer.hpp
@@ -3,10 +3,21 @@
 #include <bsoncxx/builder/basic/kvp.hpp>
 #include <bsoncxx/builder/basic/document.hpp>
 #include <bsoncxx/builder/stream/document.hpp>
+#include <bsoncxx/builder/stream/array.hpp>
+#include <bsoncxx/builder/stream/value_context.hpp>
 #include <bsoncxx/json.hpp>
 
 #include <mongocxx/client.hpp>
 #include <mongocxx/instance.hpp>
+#include <mongocxx/stdx.hpp>
+#include <mongocxx/uri.hpp>
+
+using bsoncxx::builder::stream::close_array;
+using bsoncxx::builder::stream::close_document;
+using bsoncxx::builder::stream::document;
+using bsoncxx::builder::stream::finalize;
+using bsoncxx::builder::stream::open_array;
+using bsoncxx::builder::stream::open_document;
 
 #include <golos/protocol/block.hpp>
 
@@ -18,9 +29,11 @@ namespace mongo_db {
 
     class mongo_db_writer final {
     public:
-        mongo_db_writer(const std::string& uri_str);
+        mongo_db_writer();
         ~mongo_db_writer();
 
+        bool initialize(const std::string& uri_str);
+
         void on_block(const signed_block& block);
 
     private:
diff --git a/libraries/plugins/mongo_db/mongo_db_plugin.cpp b/libraries/plugins/mongo_db/mongo_db_plugin.cpp
index f9ea2d0a29..87ffbff2ac 100644
--- a/libraries/plugins/mongo_db/mongo_db_plugin.cpp
+++ b/libraries/plugins/mongo_db/mongo_db_plugin.cpp
@@ -15,8 +15,8 @@ namespace mongo_db {
     public:
         mongo_db_plugin_impl(mongo_db_plugin &plugin, const std::string& uri_str)
                 : _my(plugin),
-                  _db(appbase::app().get_plugin<golos::plugins::chain::plugin>().db()),
-                  writer(uri_str) {
+                  _db(appbase::app().get_plugin<golos::plugins::chain::plugin>().db()) {
+            writer.initialize(uri_str);
         }
 
         ~mongo_db_plugin_impl() = default;
@@ -34,13 +34,12 @@ namespace mongo_db {
     };
 
     void mongo_db_plugin::mongo_db_plugin_impl::on_block(const signed_block &block) {
-        ilog("mongo_db plugin: on_block");
-
-
+        writer.on_block(block);
     }
 
     // Plugin
     mongo_db_plugin::mongo_db_plugin() {
+        ilog("mongo_db plugin: ctor");
     }
 
     mongo_db_plugin::~mongo_db_plugin() {
@@ -74,8 +73,8 @@ namespace mongo_db {
                 });
 
             } else {
-                wlog("golos::mongo_db_plugin configured, but no --mongodb-uri specified.");
-                wlog("mongo_db_plugin disabled.");
+                ilog("mongo_db_plugin configured, but no --mongodb-uri specified.");
+                ilog("mongo_db_plugin disabled.");
             }
 
             ilog("mongo_db plugin: plugin_initialize() end");
diff --git a/libraries/plugins/mongo_db/mongo_db_writer.cpp b/libraries/plugins/mongo_db/mongo_db_writer.cpp
index 8c91a988b2..6a310bc91f 100644
--- a/libraries/plugins/mongo_db/mongo_db_writer.cpp
+++ b/libraries/plugins/mongo_db/mongo_db_writer.cpp
@@ -1,4 +1,6 @@
 #include <golos/plugins/mongo_db/mongo_db_writer.hpp>
+#include <fc/log/logger.hpp>
+#include <mongocxx/exception/exception.hpp>
 
 
 namespace golos {
@@ -12,57 +14,69 @@ namespace mongo_db {
     const std::string mongo_db_writer::blocks_col = "Blocks";
     const std::string mongo_db_writer::trans_col = "Transactions";
 
-    mongo_db_writer::mongo_db_writer(const std::string& uri_str) {
-        mongocxx::uri uri = mongocxx::uri {uri_str};
-
-        mongo_conn = mongocxx::client {uri};
-        db_name = uri.database();
+    mongo_db_writer::mongo_db_writer() {
     }
 
-    void mongo_db_writer::on_block(const signed_block& block) {
-
-        bool transactions_in_block = false;
-        mongocxx::options::bulk_write bulk_opts;
-        bulk_opts.ordered(false);
-
-        auto blocks = mongo_conn[db_name][blocks_col]; // Blocks
-        auto trans = mongo_conn[db_name][trans_col]; // Transactions
-
-        stream::document doc{};
-        const auto block_id = block.id();
-        const auto block_id_str = block_id.str();
-        const auto prev_block_id_str = block.previous.str();
-        auto block_num = block.block_num();
-
-
-        auto now = std::chrono::duration_cast<std::chrono::milliseconds>(
-                std::chrono::microseconds{fc::time_point::now().time_since_epoch().count()});
+    bool mongo_db_writer::initialize(const std::string& uri_str) {
+        try {
+            mongocxx::uri uri = mongocxx::uri {uri_str};
 
-        doc << "block_num" << std::to_string(block_num)
-            << "block_id" << block_id_str
-            << "prev_block_id" << prev_block_id_str
-            << "transaction_merkle_root" << block.transaction_merkle_root.str()
-            << "createdAt" << std::to_string(now.count());
-
-        int32_t trx_num = -1;
-        for (const auto& trx : block.transactions) {
-            ++trx_num;
-
-            const auto trans_id_str = trx.id().str();
-            doc << "transaction_id" << trans_id_str
-                << "sequence_num" << std::to_string(trx_num)
-                << "block_id" << block_id_str
-                << "ref_block_num" << std::to_string(trx.ref_block_num)
-                << "expiration" << std::to_string(now.count());
+            mongo_conn = mongocxx::client {uri};
+            db_name = uri.database().empty() ? "Golos" : uri.database();
         }
-
-        if (!blocks.insert_one(doc.view())) {
-            ilog("Failed to insert block ${bid}", ("bid", block_id));
+        catch (mongocxx::exception & ex) {
+            ilog(ex.what());
+            return false;
         }
+        return true;
+    }
 
-        ++processed_blocks;
+    void mongo_db_writer::on_block(const signed_block& block) {
+        try {
+            auto blocks = mongo_conn[db_name][blocks_col]; // Blocks
+
+            auto doc = document {};
+
+            auto now = std::chrono::duration_cast<std::chrono::milliseconds>(
+                    std::chrono::microseconds{fc::time_point::now().time_since_epoch().count()});
+
+            auto doc_ctx = doc
+                    << "block_num" << std::to_string(block.block_num())
+                    << "block_id" << block.id().str()
+                    << "prev_block_id" << block.previous.str()
+                    << "merkle_root" << block.transaction_merkle_root.str()
+                    << "created_at" << std::to_string(now.count());
+
+            if (!block.transactions.empty()) {
+                auto in_array = doc << "transactions" << open_array;
+
+                int trx_num = -1;
+                for (const auto& trx : block.transactions) {
+                    ++trx_num;
+
+                    const auto trans_id_str = trx.id().str();
+                    in_array << open_document
+                             << "id" << trans_id_str
+                             << "sequence_num" << std::to_string(trx_num)
+                             << "ref_block_num" << std::to_string(trx.ref_block_num)
+                             << "expiration" << std::to_string(now.count())
+                             << close_document;
+                }
+                in_array << close_array;
+            }
+
+            if (!blocks.insert_one(doc.view())) {
+                ilog("Failed to insert block ${bid}", ("bid", block.id()));
+            }
+
+            ++processed_blocks;
+        }
+        catch (mongocxx::exception & ex) {
+            ilog(ex.what());
+            throw;
+        }
     }
 
     mongo_db_writer::~mongo_db_writer() {
     }
-}}}
+}}}
\ No newline at end of file