diff --git a/libraries/api/discussion_helper.cpp b/libraries/api/discussion_helper.cpp
index 59d101a08d..c1fe4b5565 100644
--- a/libraries/api/discussion_helper.cpp
+++ b/libraries/api/discussion_helper.cpp
@@ -57,6 +57,8 @@ namespace golos { namespace api {
 
         discussion get_discussion(const comment_object& c, uint32_t vote_limit, uint32_t offset) const;
 
+        void fill_discussion(discussion& d, const comment_object& comment, uint32_t vote_limit, uint32_t offset) const;
+
         void fill_comment_api_object(const comment_object& o, comment_api_object& d) const;
 
     private:
@@ -136,8 +138,28 @@ namespace golos { namespace api {
 // get_discussion
     discussion discussion_helper::impl::get_discussion(const comment_object& comment, uint32_t vote_limit, uint32_t offset) const {
         discussion d = create_discussion(comment);
+        fill_discussion(d, comment, vote_limit, offset);
+        return d;
+    }
+
+    discussion discussion_helper::get_discussion(const comment_object& c, uint32_t vote_limit, uint32_t offset) const {
+        return pimpl->get_discussion(c, vote_limit, offset);
+    }
+
+    void discussion_helper::impl::fill_discussion(
+        discussion& d, const comment_object& comment, uint32_t vote_limit, uint32_t offset
+    ) const {
         set_url(d);
 
+        fill_reputation_(database_, d.author, d.author_reputation);
+
+        if (d.body.size() > 1024 * 128) {
+            d.body = "body pruned due to size";
+        }
+        if (d.parent_author.size() > 0 && d.body.size() > 1024 * 16) {
+            d.body = "comment pruned due to size";
+        }
+
         d.active_votes_count = comment.total_votes;
 
         comment_curation_info c{database_, comment, true};
@@ -149,12 +171,12 @@ namespace golos { namespace api {
         d.active_votes = select_active_votes(c, vote_limit, offset);
 
         set_pending_payout(d);
-
-        return d;
     }
 
-    discussion discussion_helper::get_discussion(const comment_object& c, uint32_t vote_limit, uint32_t offset) const {
-        return pimpl->get_discussion(c, vote_limit, offset);
+    void discussion_helper::fill_discussion(
+        discussion& d, const comment_object& comment, uint32_t vote_limit, uint32_t offset
+    ) const {
+        pimpl->fill_discussion(d, comment, vote_limit, offset);
     }
 //
 
@@ -293,22 +315,8 @@ namespace golos { namespace api {
 
             d.total_pending_payout_value = db.to_sbd(asset(static_cast<uint64_t>(tpp), pot.symbol));
         }
-
-        fill_reputation_(db, d.author, d.author_reputation);
-
-        if (d.body.size() > 1024 * 128) {
-            d.body = "body pruned due to size";
-        }
-        if (d.parent_author.size() > 0 && d.body.size() > 1024 * 16) {
-            d.body = "comment pruned due to size";
-        }
-
-        set_url(d);
     }
 
-    void discussion_helper::set_pending_payout(discussion& d) const {
-        pimpl->set_pending_payout(d);
-    }
 //
 // set_url
     void discussion_helper::impl::set_url(discussion& d) const {
@@ -321,9 +329,6 @@ namespace golos { namespace api {
         }
     }
 
-    void discussion_helper::set_url(discussion& d) const {
-        pimpl->set_url(d);
-    }
 //
 // create_discussion
     discussion discussion_helper::impl::create_discussion(const std::string& author) const {
diff --git a/libraries/api/include/golos/api/discussion_helper.hpp b/libraries/api/include/golos/api/discussion_helper.hpp
index 664f70fed8..c36bc817a6 100644
--- a/libraries/api/include/golos/api/discussion_helper.hpp
+++ b/libraries/api/include/golos/api/discussion_helper.hpp
@@ -21,11 +21,6 @@ namespace golos { namespace api {
         );
         ~discussion_helper();
 
-
-        void set_pending_payout(discussion& d) const;
-
-        void set_url(discussion& d) const;
-
         std::vector<vote_state> select_active_votes(
                 const std::string& author, const std::string& permlink, uint32_t limit, uint32_t offset
         ) const;
@@ -38,6 +33,8 @@ namespace golos { namespace api {
 
         comment_api_object create_comment_api_object(const comment_object& o) const;
 
+        void fill_discussion(discussion&, const comment_object&, uint32_t vote_limit, uint32_t offset) const;
+
         void fill_comment_api_object(const comment_object& o, comment_api_object& d) const;
 
 
diff --git a/libraries/protocol/include/golos/protocol/config.hpp b/libraries/protocol/include/golos/protocol/config.hpp
index c3c9c84782..8d06a5f53a 100644
--- a/libraries/protocol/include/golos/protocol/config.hpp
+++ b/libraries/protocol/include/golos/protocol/config.hpp
@@ -3,7 +3,7 @@
  */
 #pragma once
 
-#define STEEMIT_BLOCKCHAIN_VERSION              (version(0, 19, 0))
+#define STEEMIT_BLOCKCHAIN_VERSION              (version(0, 19, 1))
 #define STEEMIT_BLOCKCHAIN_HARDFORK_VERSION     (hardfork_version(STEEMIT_BLOCKCHAIN_VERSION))
 
 #ifdef STEEMIT_BUILD_TESTNET
diff --git a/plugins/database_api/api.cpp b/plugins/database_api/api.cpp
index 2d5152d44a..f23b117870 100755
--- a/plugins/database_api/api.cpp
+++ b/plugins/database_api/api.cpp
@@ -97,7 +97,6 @@ struct plugin::api_impl final {
     uint64_t get_account_count() const;
 
     // Authority / validation
-    std::string get_transaction_hex(const signed_transaction &trx) const;
     std::set<public_key_type> get_required_signatures(const signed_transaction &trx, const flat_set<public_key_type> &available_keys) const;
     std::set<public_key_type> get_potential_signatures(const signed_transaction &trx) const;
     bool verify_authority(const signed_transaction &trx) const;
@@ -572,17 +571,20 @@ DEFINE_API(plugin, get_account_bandwidth) {
 //                                                                  //
 //////////////////////////////////////////////////////////////////////
 
-DEFINE_API(plugin, get_transaction_hex) {
+DEFINE_API(plugin, get_transaction_digest) {
     PLUGIN_API_VALIDATE_ARGS(
-        (signed_transaction, trx)
+        (transaction, trx)
     );
-    return my->database().with_weak_read_lock([&]() {
-        return my->get_transaction_hex(trx);
-    });
+    static const auto chain_id = STEEMIT_CHAIN_ID;
+    return trx.sig_digest(chain_id).str();
 }
 
-std::string plugin::api_impl::get_transaction_hex(const signed_transaction &trx) const {
+DEFINE_API(plugin, get_transaction_hex) {
+    PLUGIN_API_VALIDATE_ARGS(
+        (transaction, trx)
+    );
     return fc::to_hex(fc::raw::pack(trx));
+
 }
 
 DEFINE_API(plugin, get_required_signatures) {
diff --git a/plugins/database_api/include/golos/plugins/database_api/plugin.hpp b/plugins/database_api/include/golos/plugins/database_api/plugin.hpp
index d997db5567..13d7c2c08b 100755
--- a/plugins/database_api/include/golos/plugins/database_api/plugin.hpp
+++ b/plugins/database_api/include/golos/plugins/database_api/plugin.hpp
@@ -120,6 +120,7 @@ DEFINE_API_ARGS(get_vesting_delegations,          msg_pack, vector<vesting_deleg
 DEFINE_API_ARGS(get_expiring_vesting_delegations, msg_pack, vector<vesting_delegation_expiration_api_object>)
 
 DEFINE_API_ARGS(get_conversion_requests,          msg_pack, std::vector<convert_request_api_object>)
+DEFINE_API_ARGS(get_transaction_digest,           msg_pack, std::string)
 DEFINE_API_ARGS(get_transaction_hex,              msg_pack, std::string)
 DEFINE_API_ARGS(get_required_signatures,          msg_pack, std::set<public_key_type>)
 DEFINE_API_ARGS(get_potential_signatures,         msg_pack, std::set<public_key_type>)
@@ -284,6 +285,9 @@ class plugin final : public appbase::plugin<plugin> {
         // Authority / Validation //
         ////////////////////////////
 
+        /// @brief Get a hexdump of the serialized binary form of a transaction digest
+        (get_transaction_digest)
+
         /// @brief Get a hexdump of the serialized binary form of a transaction
         (get_transaction_hex)
 
diff --git a/plugins/social_network/social_network.cpp b/plugins/social_network/social_network.cpp
index 28c4f21e2a..021bf71454 100644
--- a/plugins/social_network/social_network.cpp
+++ b/plugins/social_network/social_network.cpp
@@ -230,24 +230,22 @@ namespace golos { namespace plugins { namespace social_network {
         }
 
         void operator()(const delete_comment_operation& o) const {
-            const auto& comment = impl.db.get_comment(o.author, o.permlink);
-            const auto content = impl.find_comment_content(comment.id);
-
-            if (content == nullptr) {
+            const auto* comment = impl.db.find_comment(o.author, o.permlink);
+            if (comment == nullptr) {
                 return;
             }
 
-            impl.db.remove(*content);
+            const auto content = impl.find_comment_content(comment->id);
 
-            if (impl.db.template has_index<comment_last_update_index>()) {
-                if (comment.net_rshares > 0) {
-                    return;
-                }
+            if (content != nullptr) {
+                impl.db.remove(*content);
+            }
 
-                impl.activate_parent_comments(comment);
+            if (impl.db.template has_index<comment_last_update_index>()) {
+                impl.activate_parent_comments(*comment);
 
                 auto& idx = impl.db.template get_index<comment_last_update_index>().indices().template get<by_comment>();
-                auto itr = idx.find(comment.id);
+                auto itr = idx.find(comment->id);
                 if (idx.end() != itr) {
                     impl.db.remove(*itr);
                 }
@@ -255,7 +253,7 @@ namespace golos { namespace plugins { namespace social_network {
 
             if (impl.db.template has_index<comment_reward_index>()) {
                 auto& idx = impl.db.template get_index<comment_reward_index>().indices().template get<by_comment>();
-                auto itr = idx.find(comment.id);
+                auto itr = idx.find(comment->id);
                 if (idx.end() != itr) {
                     impl.db.remove(*itr);
                 }
@@ -287,10 +285,14 @@ namespace golos { namespace plugins { namespace social_network {
         } /// ignore all other ops
 
         void operator()(const golos::protocol::comment_operation& o) const {
-            const auto& comment = db.get_comment(o.author, o.permlink);
+            const auto* comment = db.find_comment(o.author, o.permlink);
+            if (nullptr == comment) {
+                return;
+            }
+
             const auto& dp = depth_parameters;
             if (!dp.miss_content()) {
-                const auto comment_content = impl.find_comment_content(comment.id);
+                const auto comment_content = impl.find_comment_content(comment->id);
                 if ( comment_content != nullptr) {
                     // Edit case
                     db.modify(*comment_content, [&]( comment_content_object& con ) {
@@ -331,7 +333,7 @@ namespace golos { namespace plugins { namespace social_network {
                 } else {
                     // Creation case
                     db.create<comment_content_object>([&](comment_content_object& con) {
-                        con.comment = comment.id;
+                        con.comment = comment->id;
                         if (!dp.has_comment_title_depth || dp.comment_title_depth > 0) {
                             from_string(con.title, o.title);
                         }
@@ -351,8 +353,8 @@ namespace golos { namespace plugins { namespace social_network {
 
             if (db.has_index<comment_last_update_index>()) {
                 auto now = db.head_block_time();
-                if (!impl.set_comment_update(comment, now, true)) { // If create case
-                    impl.activate_parent_comments(comment);
+                if (!impl.set_comment_update(*comment, now, true)) { // If create case
+                    impl.activate_parent_comments(*comment);
                 }
             }
         }
@@ -472,10 +474,14 @@ namespace golos { namespace plugins { namespace social_network {
                 auto& content = *itr;
                 ++itr;
 
-                auto& comment = db.get_comment(content.comment);
+                auto* comment = db.find<comment_object, by_id>(content.comment);
+                if (nullptr == comment) {
+                    db.remove(content);
+                    continue;
+                }
 
                 auto delta = head_block_num - content.block_number;
-                if (comment.mode == archived && dp.should_delete_part_of_content_object(delta)) {
+                if (comment->mode == archived && dp.should_delete_part_of_content_object(delta)) {
                     if (dp.should_delete_whole_content_object(delta)) {
                         db.remove(content);
                         continue;
@@ -509,10 +515,14 @@ namespace golos { namespace plugins { namespace social_network {
                 auto& clu = *itr;
                 ++itr;
 
-                auto& comment = db.get_comment(clu.comment);
+                auto* comment = db.find<comment_object, by_id>(clu.comment);
+                if (nullptr == comment) {
+                    db.remove(clu);
+                    continue;
+                }
 
                 auto delta = head_block_num - clu.block_number;
-                if (comment.mode == archived && depth_parameters.should_delete_last_update_object(delta)) {
+                if (comment->mode == archived && depth_parameters.should_delete_last_update_object(delta)) {
                     db.remove(clu);
                 } else {
                     break;
@@ -720,9 +730,12 @@ namespace golos { namespace plugins { namespace social_network {
                     continue;
                 }
 
-                const auto& vo = db.get(itr->comment);
+                const auto* vo = db.find(itr->comment);
+                if (nullptr == vo) {
+                    continue;
+                }
                 account_vote avote;
-                avote.authorperm = vo.author + "/" + to_string(vo.permlink);
+                avote.authorperm = vo->author + "/" + to_string(vo->permlink);
                 //avote.weight = itr->weight; // TODO:
                 avote.rshares = itr->rshares;
                 avote.percent = itr->vote_percent;
@@ -806,7 +819,10 @@ namespace golos { namespace plugins { namespace social_network {
         result.reserve(limit);
 
         while (itr != clu_idx.end() && result.size() < limit && itr->parent_author == *parent_author) {
-            result.emplace_back(get_discussion(db.get_comment(itr->comment), vote_limit, vote_offset));
+            auto* comment = db.find<comment_object, by_id>(itr->comment);
+            if (nullptr != comment) {
+                result.emplace_back(get_discussion(*comment, vote_limit, vote_offset));
+            }
             ++itr;
         }
 
diff --git a/plugins/tags/plugin.cpp b/plugins/tags/plugin.cpp
index 3c23c79977..3476014daf 100644
--- a/plugins/tags/plugin.cpp
+++ b/plugins/tags/plugin.cpp
@@ -51,8 +51,6 @@ namespace golos { namespace plugins { namespace tags {
             return database_;
         }
 
-        std::vector<vote_state> select_active_votes(const std::string& author, const std::string& permlink, uint32_t limit, uint32_t offset) const;
-
         bool filter_tags(const tags::tag_type type, std::set<std::string>& select_tags) const;
 
         bool filter_authors(discussion_query& query) const;
@@ -84,10 +82,6 @@ namespace golos { namespace plugins { namespace tags {
 
         std::vector<std::pair<std::string, uint32_t>> get_tags_used_by_author(const std::string& author) const;
 
-        void set_pending_payout(discussion& d) const;
-
-        void set_url(discussion& d) const;
-
         std::vector<discussion> get_replies_by_last_update(
             account_name_type start_parent_author, std::string start_permlink,
             uint32_t limit, uint32_t vote_limit
@@ -111,12 +105,6 @@ namespace golos { namespace plugins { namespace tags {
         std::unique_ptr<discussion_helper> helper;
     };
 
-    std::vector<vote_state> tags_plugin::impl::select_active_votes(
-        const std::string& author, const std::string& permlink, uint32_t limit, uint32_t offset
-    ) const {
-        return helper->select_active_votes(author, permlink, limit, offset);
-    }
-
     discussion tags_plugin::impl::get_discussion(const comment_object& c, uint32_t vote_limit, uint32_t votes_offset) const {
         return helper->get_discussion(c, vote_limit, votes_offset);
     }
@@ -139,9 +127,8 @@ namespace golos { namespace plugins { namespace tags {
     }
 
     void tags_plugin::impl::fill_discussion(discussion& d, const discussion_query& query) const {
-        set_url(d);
-        set_pending_payout(d);
-        d.active_votes = select_active_votes(d.author, d.permlink, query.vote_limit, query.vote_offset);
+        helper->fill_discussion(d, database_.get_comment(d.author, d.permlink),  query.vote_limit, query.vote_offset);
+
         d.body_length = static_cast<uint32_t>(d.body.size());
         if (query.truncate_body) {
             if (d.body.size() > query.truncate_body) {
@@ -231,10 +218,6 @@ namespace golos { namespace plugins { namespace tags {
 
     tags_plugin::~tags_plugin() = default;
 
-    void tags_plugin::impl::set_url(discussion& d) const {
-        helper->set_url( d );
-    }
-
     boost::multiprecision::uint256_t to256(const fc::uint128_t& t) {
         boost::multiprecision::uint256_t result(t.high_bits());
         result <<= 65;
@@ -242,10 +225,6 @@ namespace golos { namespace plugins { namespace tags {
         return result;
     }
 
-    void tags_plugin::impl::set_pending_payout(discussion& d) const {
-        helper->set_pending_payout(d);
-    }
-
     bool tags_plugin::impl::filter_tags(const tags::tag_type type, std::set<std::string>& select_tags) const {
         if (select_tags.empty()) {
             return true;