diff --git a/tl/generate/scheme/ton_api.tl b/tl/generate/scheme/ton_api.tl
index c61bad85..af9df3fd 100644
--- a/tl/generate/scheme/ton_api.tl
+++ b/tl/generate/scheme/ton_api.tl
@@ -752,7 +752,14 @@ http.server.config dhs:(vector http.server.dnsEntry) local_hosts:(vector http.se
 
 ---types---
 
-validatorSession.statsProducer id:int256 candidate_id:int256 block_status:int block_timestamp:long comment:string = validatorSession.StatsProducer;
+validatorSession.statsProducer id:int256 candidate_id:int256 block_status:int comment:string
+  block_timestamp:double is_accepted:Bool is_ours:Bool got_submit_at:double
+  collation_time:double collated_at:double collation_cached:Bool
+  validation_time:double validated_at:double validation_cached:Bool
+  gen_utime:double
+  approved_weight:long approved_33pct_at:double approved_66pct_at:double
+  signed_weight:long signed_33pct_at:double signed_66pct_at:double
+  serialize_time:double deserialize_time:double serialized_size:int = validatorSession.StatsProducer;
 
 validatorSession.statsRound timestamp:long producers:(vector validatorSession.statsProducer) = validatorSession.StatsRound;
 
diff --git a/tl/generate/scheme/ton_api.tlo b/tl/generate/scheme/ton_api.tlo
index b8f5d5a4..c97fa2fe 100644
Binary files a/tl/generate/scheme/ton_api.tlo and b/tl/generate/scheme/ton_api.tlo differ
diff --git a/validator-session/candidate-serializer.cpp b/validator-session/candidate-serializer.cpp
index c220b4a9..a85c4b72 100644
--- a/validator-session/candidate-serializer.cpp
+++ b/validator-session/candidate-serializer.cpp
@@ -14,7 +14,6 @@
     You should have received a copy of the GNU Lesser General Public License
     along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
 */
-#pragma once
 #include "candidate-serializer.h"
 #include "tl-utils/tl-utils.hpp"
 #include "vm/boc.h"
diff --git a/validator-session/validator-session-types.h b/validator-session/validator-session-types.h
index bcbaa8f7..db06bbd9 100644
--- a/validator-session/validator-session-types.h
+++ b/validator-session/validator-session-types.h
@@ -76,8 +76,57 @@ struct ValidatorSessionStats {
     PublicKeyHash id = PublicKeyHash::zero();
     ValidatorSessionCandidateId candidate_id = ValidatorSessionCandidateId::zero();
     int block_status = status_none;
-    td::uint64 block_timestamp = 0;
+    double block_timestamp = -1.0;
     std::string comment;
+
+    bool is_accepted = false;
+    bool is_ours = false;
+    double got_submit_at = -1.0;
+    double collation_time = -1.0;
+    double validation_time = -1.0;
+    double collated_at = -1.0;
+    double validated_at = -1.0;
+    bool collation_cached = false;
+    bool validation_cached = false;
+    double gen_utime = -1.0;
+
+    std::vector<bool> approvers, signers;
+    ValidatorWeight approved_weight = 0;
+    ValidatorWeight signed_weight = 0;
+    double approved_33pct_at = -1.0;
+    double approved_66pct_at = -1.0;
+    double signed_33pct_at = -1.0;
+    double signed_66pct_at = -1.0;
+
+    double serialize_time = -1.0;
+    double deserialize_time = -1.0;
+    td::int32 serialized_size = -1;
+
+    void set_approved_by(td::uint32 id, ValidatorWeight weight, ValidatorWeight total_weight) {
+      if (!approvers.at(id)) {
+        approvers.at(id) = true;
+        approved_weight += weight;
+        if (approved_33pct_at <= 0.0 && approved_weight >= total_weight / 3 + 1) {
+          approved_33pct_at = td::Clocks::system();
+        }
+        if (approved_66pct_at <= 0.0 && approved_weight >= (total_weight * 2) / 3 + 1) {
+          approved_66pct_at = td::Clocks::system();
+        }
+      }
+    }
+
+    void set_signed_by(td::uint32 id, ValidatorWeight weight, ValidatorWeight total_weight) {
+      if (!signers.at(id)) {
+        signers.at(id) = true;
+        signed_weight += weight;
+        if (signed_33pct_at <= 0.0 && signed_weight >= total_weight / 3 + 1) {
+          signed_33pct_at = td::Clocks::system();
+        }
+        if (signed_66pct_at <= 0.0 && signed_weight >= (total_weight * 2) / 3 + 1) {
+          signed_66pct_at = td::Clocks::system();
+        }
+      }
+    }
   };
   struct Round {
     td::uint64 timestamp = 0;
diff --git a/validator-session/validator-session.cpp b/validator-session/validator-session.cpp
index 6b328b2b..215b6b12 100644
--- a/validator-session/validator-session.cpp
+++ b/validator-session/validator-session.cpp
@@ -20,6 +20,7 @@
 #include "td/utils/Random.h"
 #include "td/utils/crypto.h"
 #include "candidate-serializer.h"
+#include "td/utils/overloaded.h"
 
 namespace ton {
 
@@ -86,6 +87,7 @@ void ValidatorSessionImpl::process_blocks(std::vector<catchain::CatChainBlock *>
 
   for (auto &msg : msgs) {
     VLOG(VALIDATOR_SESSION_INFO) << this << ": applying action: " << msg.get();
+    stats_process_action(local_idx(), *msg);
     real_state_ = ValidatorSessionState::action(description(), real_state_, local_idx(), att, msg.get());
   }
 
@@ -167,6 +169,7 @@ void ValidatorSessionImpl::preprocess_block(catchain::CatChainBlock *block) {
       for (auto &msg : B->actions_) {
         VLOG(VALIDATOR_SESSION_INFO) << this << "[node " << description().get_source_id(block->source()) << "][block "
                                      << block->hash() << "]: applying action " << msg.get();
+        stats_process_action(block->source(), *msg);
         state = ValidatorSessionState::action(description(), state, block->source(), att, msg.get());
       }
       state = ValidatorSessionState::make_all(description(), state, block->source(), att);
@@ -222,9 +225,11 @@ void ValidatorSessionImpl::process_broadcast(PublicKeyHash src, td::BufferSlice
   // Note: src is not necessarily equal to the sender of this message:
   // If requested using get_broadcast_p2p, src is the creator of the block, sender possibly is some other node.
   auto src_idx = description().get_source_idx(src);
+  td::Timer deserialize_timer;
   auto R =
       deserialize_candidate(data, compress_block_candidates_,
                             description().opts().max_block_size + description().opts().max_collated_data_size + 1024);
+  double deserialize_time = deserialize_timer.elapsed();
   if (R.is_error()) {
     VLOG(VALIDATOR_SESSION_WARNING) << this << "[node " << src << "][broadcast " << sha256_bits256(data.as_slice())
                                     << "]: failed to parse: " << R.move_as_error();
@@ -255,6 +260,18 @@ void ValidatorSessionImpl::process_broadcast(PublicKeyHash src, td::BufferSlice
     return;
   }
 
+  auto stat = stats_get_candidate_stat(block_round, src, block_id);
+  if (stat) {
+    if (stat->block_status == ValidatorSessionStats::status_none) {
+      stat->block_status = ValidatorSessionStats::status_received;
+    }
+    if (stat->block_timestamp <= 0.0) {
+      stat->block_timestamp = td::Clocks::system();
+    }
+    stat->deserialize_time = deserialize_time;
+    stat->serialized_size = data.size();
+  }
+
   if ((td::int32)block_round < (td::int32)cur_round_ - MAX_PAST_ROUND_BLOCK ||
       block_round >= cur_round_ + MAX_FUTURE_ROUND_BLOCK) {
     VLOG(VALIDATOR_SESSION_NOTICE) << this << "[node " << src << "][broadcast " << block_id
@@ -291,7 +308,6 @@ void ValidatorSessionImpl::process_broadcast(PublicKeyHash src, td::BufferSlice
   CHECK(!pending_reject_.count(block_id));
   CHECK(!rejected_.count(block_id));
 
-  stats_set_candidate_status(cur_round_, src, block_id, ValidatorSessionStats::status_received);
   auto v = virtual_state_->choose_blocks_to_approve(description(), local_idx());
   for (auto &b : v) {
     if (b && SentBlock::get_block_id(b) == block_id) {
@@ -363,9 +379,16 @@ void ValidatorSessionImpl::process_query(PublicKeyHash src, td::BufferSlice data
 }
 
 void ValidatorSessionImpl::candidate_decision_fail(td::uint32 round, ValidatorSessionCandidateId hash,
-                                                   std::string result, td::uint32 src, td::BufferSlice proof) {
-  stats_set_candidate_status(round, description().get_source_id(src), hash, ValidatorSessionStats::status_rejected,
-                             result);
+                                                   std::string result, td::uint32 src, td::BufferSlice proof,
+                                                   double validation_time, bool validation_cached) {
+  auto stat = stats_get_candidate_stat(round, description().get_source_id(src), hash);
+  if (stat) {
+    stat->block_status = ValidatorSessionStats::status_rejected;
+    stat->comment = result;
+    stat->validation_time = validation_time;
+    stat->validated_at = td::Clocks::system();
+    stat->validation_cached = validation_cached;
+  }
   if (round != cur_round_) {
     return;
   }
@@ -379,9 +402,17 @@ void ValidatorSessionImpl::candidate_decision_fail(td::uint32 round, ValidatorSe
 }
 
 void ValidatorSessionImpl::candidate_decision_ok(td::uint32 round, ValidatorSessionCandidateId hash, RootHash root_hash,
-                                                 FileHash file_hash, td::uint32 src, td::uint32 ok_from) {
-  stats_set_candidate_status(round, description().get_source_id(src), hash, ValidatorSessionStats::status_approved,
-                             PSTRING() << "ts=" << ok_from);
+                                                 FileHash file_hash, td::uint32 src, td::uint32 ok_from,
+                                                 double validation_time, bool validation_cached) {
+  auto stat = stats_get_candidate_stat(round, description().get_source_id(src), hash);
+  if (stat) {
+    stat->block_status = ValidatorSessionStats::status_approved;
+    stat->comment = PSTRING() << "ts=" << ok_from;
+    stat->validation_time = validation_time;
+    stat->gen_utime = (double)ok_from;
+    stat->validated_at = td::Clocks::system();
+    stat->validation_cached = validation_cached;
+  }
   if (round != cur_round_) {
     return;
   }
@@ -418,10 +449,8 @@ void ValidatorSessionImpl::candidate_approved_signed(td::uint32 round, Validator
 }
 
 void ValidatorSessionImpl::generated_block(td::uint32 round, ValidatorSessionCandidateId root_hash,
-                                           td::BufferSlice data, td::BufferSlice collated_data) {
-  if (round != cur_round_) {
-    return;
-  }
+                                           td::BufferSlice data, td::BufferSlice collated_data, double collation_time,
+                                           bool collation_cached) {
   if (data.size() > description().opts().max_block_size ||
       collated_data.size() > description().opts().max_collated_data_size) {
     LOG(ERROR) << this << ": generated candidate is too big. Dropping. size=" << data.size() << " "
@@ -430,13 +459,27 @@ void ValidatorSessionImpl::generated_block(td::uint32 round, ValidatorSessionCan
   }
   auto file_hash = sha256_bits256(data.as_slice());
   auto collated_data_file_hash = sha256_bits256(collated_data.as_slice());
+  auto block_id = description().candidate_id(local_idx(), root_hash, file_hash, collated_data_file_hash);
 
+  auto stat = stats_get_candidate_stat(round, local_id(), block_id);
+  if (stat) {
+    stat->block_status = ValidatorSessionStats::status_received;
+    stat->collation_time = collation_time;
+    stat->collated_at = td::Clocks::system();
+    stat->block_timestamp = td::Clocks::system();
+    stat->collation_cached = collation_cached;
+  }
+  if (round != cur_round_) {
+    return;
+  }
+  td::Timer serialize_timer;
   auto b = create_tl_object<ton_api::validatorSession_candidate>(local_id().tl(), round, root_hash, std::move(data),
                                                                  std::move(collated_data));
-
   auto B = serialize_candidate(b, compress_block_candidates_).move_as_ok();
-
-  auto block_id = description().candidate_id(local_idx(), root_hash, file_hash, collated_data_file_hash);
+  if (stat) {
+    stat->serialize_time = serialize_timer.elapsed();
+    stat->serialized_size = B.size();
+  }
 
   td::actor::send_closure(catchain_, &catchain::CatChain::send_broadcast, std::move(B));
 
@@ -496,11 +539,11 @@ void ValidatorSessionImpl::check_generate_slot() {
         td::PerfWarningTimer timer{"too long block generation", 1.0};
 
         auto P = td::PromiseCreator::lambda([SelfId = actor_id(this), print_id = print_id(), timer = std::move(timer),
-                                             round = cur_round_](td::Result<BlockCandidate> R) {
+                                             round = cur_round_](td::Result<GeneratedCandidate> R) {
           if (R.is_ok()) {
-            auto c = R.move_as_ok();
+            auto c = std::move(R.ok_ref().candidate);
             td::actor::send_closure(SelfId, &ValidatorSessionImpl::generated_block, round, c.id.root_hash,
-                                    c.data.clone(), c.collated_data.clone());
+                                    c.data.clone(), c.collated_data.clone(), timer.elapsed(), R.ok().is_cached);
           } else {
             LOG(WARNING) << print_id << ": failed to generate block candidate: " << R.move_as_error();
           }
@@ -550,6 +593,16 @@ void ValidatorSessionImpl::try_approve_block(const SentBlock *block) {
       it->second->round_ = std::max<td::uint32>(it->second->round_, cur_round_);
       td::PerfWarningTimer timer{"too long block validation", 1.0};
       auto &B = it->second;
+      auto stat = stats_get_candidate_stat(B->round_, PublicKeyHash{B->src_});
+      if (stat) {
+        // Can happen if block is cached from previous round
+        if (stat->block_status == ValidatorSessionStats::status_none) {
+          stat->block_status = ValidatorSessionStats::status_received;
+        }
+        if (stat->block_timestamp <= 0.0) {
+          stat->block_timestamp = td::Clocks::system();
+        }
+      }
 
       auto P = td::PromiseCreator::lambda([round = cur_round_, hash = block_id, root_hash = block->get_root_hash(),
                                            file_hash = block->get_file_hash(), timer = std::move(timer),
@@ -563,10 +616,10 @@ void ValidatorSessionImpl::try_approve_block(const SentBlock *block) {
         auto R = res.move_as_ok();
         if (R.is_ok()) {
           td::actor::send_closure(SelfId, &ValidatorSessionImpl::candidate_decision_ok, round, hash, root_hash,
-                                  file_hash, src, R.ok_from());
+                                  file_hash, src, R.ok_from(), timer.elapsed(), R.is_cached());
         } else {
           td::actor::send_closure(SelfId, &ValidatorSessionImpl::candidate_decision_fail, round, hash, R.reason(),
-                                  src, R.proof());
+                                  src, R.proof(), timer.elapsed(), R.is_cached());
         }
       });
       pending_approve_.insert(block_id);
@@ -824,22 +877,28 @@ void ValidatorSessionImpl::on_new_round(td::uint32 round) {
       cur_stats_.approve_signatures = (td::uint32)export_approve_sigs.size();
       cur_stats_.approve_signatures_weight = approve_signatures_weight;
       cur_stats_.creator = description().get_source_id(block->get_src_idx());
+      auto stat = stats_get_candidate_stat(cur_round_, cur_stats_.creator);
+      if (stat) {
+        stat->is_accepted = true;
+      }
+      auto stats = cur_stats_;
+      while (!stats.rounds.empty() && stats.rounds.size() + stats.first_round - 1 > cur_round_) {
+        stats.rounds.pop_back();
+      }
 
       if (it == blocks_.end()) {
         callback_->on_block_committed(cur_round_, description().get_source_public_key(block->get_src_idx()),
                                       block->get_root_hash(), block->get_file_hash(), td::BufferSlice(),
-                                      std::move(export_sigs), std::move(export_approve_sigs), std::move(cur_stats_));
+                                      std::move(export_sigs), std::move(export_approve_sigs), std::move(stats));
       } else {
         callback_->on_block_committed(cur_round_, description().get_source_public_key(block->get_src_idx()),
                                       block->get_root_hash(), block->get_file_hash(), it->second->data_.clone(),
-                                      std::move(export_sigs), std::move(export_approve_sigs), std::move(cur_stats_));
+                                      std::move(export_sigs), std::move(export_approve_sigs), std::move(stats));
       }
     }
     cur_round_++;
     if (have_block) {
       stats_init();
-    } else {
-      stats_add_round();
     }
     auto it2 = blocks_.begin();
     while (it2 != blocks_.end()) {
@@ -997,13 +1056,35 @@ void ValidatorSessionImpl::start_up() {
 }
 
 void ValidatorSessionImpl::stats_init() {
+  auto old_rounds = std::move(cur_stats_.rounds);
+  if (stats_inited_ && cur_stats_.first_round + old_rounds.size() > cur_round_) {
+    old_rounds.erase(old_rounds.begin(), old_rounds.end() - (cur_stats_.first_round + old_rounds.size() - cur_round_));
+  } else {
+    old_rounds.clear();
+  }
   cur_stats_ = ValidatorSessionStats();
+  cur_stats_.rounds = std::move(old_rounds);
   cur_stats_.first_round = cur_round_;
   cur_stats_.session_id = unique_hash_;
   cur_stats_.total_validators = description().get_total_nodes();
   cur_stats_.total_weight = description().get_total_weight();
   cur_stats_.self = description().get_source_id(local_idx());
-  stats_add_round();
+
+  for (auto it = stats_pending_approve_.begin(); it != stats_pending_approve_.end(); ) {
+    if (it->first.first < cur_round_) {
+      it = stats_pending_approve_.erase(it);
+    } else {
+      ++it;
+    }
+  }
+  for (auto it = stats_pending_sign_.begin(); it != stats_pending_sign_.end(); ) {
+    if (it->first.first < cur_round_) {
+      it = stats_pending_sign_.erase(it);
+    } else {
+      ++it;
+    }
+  }
+  stats_inited_ = true;
 }
 
 void ValidatorSessionImpl::stats_add_round() {
@@ -1016,6 +1097,9 @@ void ValidatorSessionImpl::stats_add_round() {
     if (priority >= 0) {
       CHECK((size_t)priority < round.producers.size());
       round.producers[priority].id = description().get_source_id(i);
+      round.producers[priority].is_ours = (local_idx() == i);
+      round.producers[priority].approvers.resize(description().get_total_nodes(), false);
+      round.producers[priority].signers.resize(description().get_total_nodes(), false);
     }
   }
   while (!round.producers.empty() && round.producers.back().id.is_zero()) {
@@ -1023,26 +1107,93 @@ void ValidatorSessionImpl::stats_add_round() {
   }
 }
 
-void ValidatorSessionImpl::stats_set_candidate_status(td::uint32 round, PublicKeyHash src,
-                                                      ValidatorSessionCandidateId candidate_id, int status,
-                                                      std::string comment) {
-  if (round < cur_stats_.first_round || round - cur_stats_.first_round >= cur_stats_.rounds.size()) {
-    return;
+ValidatorSessionStats::Producer *ValidatorSessionImpl::stats_get_candidate_stat(
+    td::uint32 round, PublicKeyHash src, ValidatorSessionCandidateId candidate_id) {
+  if (round < cur_stats_.first_round || round > cur_round_ + 5) {
+    return nullptr;
+  }
+  while (round - cur_stats_.first_round >= cur_stats_.rounds.size()) {
+    stats_add_round();
   }
   auto &stats_round = cur_stats_.rounds[round - cur_stats_.first_round];
   auto it = std::find_if(stats_round.producers.begin(), stats_round.producers.end(),
                          [&](const ValidatorSessionStats::Producer &p) { return p.id == src; });
   if (it == stats_round.producers.end()) {
-    return;
+    return nullptr;
   }
-  it->candidate_id = candidate_id;
-  if (it->block_status == ValidatorSessionStats::status_none) {
-    it->block_timestamp = (td::uint64)td::Clocks::system();
+  if (!candidate_id.is_zero()) {
+    it->candidate_id = candidate_id;
   }
-  it->block_status = status;
-  if (!comment.empty()) {
-    it->comment = std::move(comment);
+  auto it2 = stats_pending_approve_.find({round, it->candidate_id});
+  if (it2 != stats_pending_approve_.end()) {
+    for (td::uint32 node_id : it2->second) {
+      it->set_approved_by(node_id, description().get_node_weight(node_id), description().get_total_weight());
+    }
+    stats_pending_approve_.erase(it2);
   }
+  it2 = stats_pending_sign_.find({round, it->candidate_id});
+  if (it2 != stats_pending_sign_.end()) {
+    for (td::uint32 node_id : it2->second) {
+      it->set_signed_by(node_id, description().get_node_weight(node_id), description().get_total_weight());
+    }
+    stats_pending_sign_.erase(it2);
+  }
+  return &*it;
+}
+
+ValidatorSessionStats::Producer *ValidatorSessionImpl::stats_get_candidate_stat_by_id(
+    td::uint32 round, ValidatorSessionCandidateId candidate_id) {
+  if (round < cur_stats_.first_round || round > cur_round_ + 5) {
+    return nullptr;
+  }
+  while (round - cur_stats_.first_round >= cur_stats_.rounds.size()) {
+    stats_add_round();
+  }
+  auto &stats_round = cur_stats_.rounds[round - cur_stats_.first_round];
+  auto it = std::find_if(stats_round.producers.begin(), stats_round.producers.end(),
+                         [&](const ValidatorSessionStats::Producer &p) { return p.candidate_id == candidate_id; });
+  if (it == stats_round.producers.end()) {
+    return nullptr;
+  }
+  return &*it;
+}
+
+void ValidatorSessionImpl::stats_process_action(td::uint32 node_id, ton_api::validatorSession_round_Message &action) {
+  ton_api::downcast_call(action, td::overloaded(
+                                     [&](const ton_api::validatorSession_message_submittedBlock &obj) {
+                                       auto candidate_id = description().candidate_id(
+                                           node_id, obj.root_hash_, obj.file_hash_, obj.collated_data_file_hash_);
+                                       auto stat = stats_get_candidate_stat(
+                                           obj.round_, description().get_source_id(node_id), candidate_id);
+                                       if (stat && stat->got_submit_at <= 0.0) {
+                                         stat->got_submit_at = td::Clocks::system();
+                                       }
+                                     },
+                                     [&](const ton_api::validatorSession_message_approvedBlock &obj) {
+                                       if (obj.candidate_ == skip_round_candidate_id()) {
+                                         return;
+                                       }
+                                       auto stat = stats_get_candidate_stat_by_id(obj.round_, obj.candidate_);
+                                       if (stat) {
+                                         stat->set_approved_by(node_id, description().get_node_weight(node_id),
+                                                               description().get_total_weight());
+                                       } else {
+                                         stats_pending_approve_[{obj.round_, obj.candidate_}].push_back(node_id);
+                                       }
+                                     },
+                                     [&](const ton_api::validatorSession_message_commit &obj) {
+                                       if (obj.candidate_ == skip_round_candidate_id()) {
+                                         return;
+                                       }
+                                       auto stat = stats_get_candidate_stat_by_id(obj.round_, obj.candidate_);
+                                       if (stat) {
+                                         stat->set_signed_by(node_id, description().get_node_weight(node_id),
+                                                             description().get_total_weight());
+                                       } else {
+                                         stats_pending_sign_[{obj.round_, obj.candidate_}].push_back(node_id);
+                                       }
+                                     },
+                                     [](const auto &) {}));
 }
 
 td::actor::ActorOwn<ValidatorSession> ValidatorSession::create(
diff --git a/validator-session/validator-session.h b/validator-session/validator-session.h
index 6300eaa4..2dd6625c 100644
--- a/validator-session/validator-session.h
+++ b/validator-session/validator-session.h
@@ -56,6 +56,12 @@ class ValidatorSession : public td::actor::Actor {
     td::BufferSlice proof() const {
       return proof_.clone();
     }
+    bool is_cached() const {
+      return is_cached_;
+    }
+    void set_is_cached(bool value = true) {
+      is_cached_ = value;
+    }
     CandidateDecision(td::uint32 ok_from) {
       ok_ = true;
       ok_from_ = ok_from;
@@ -69,6 +75,12 @@ class ValidatorSession : public td::actor::Actor {
     td::uint32 ok_from_ = 0;
     std::string reason_;
     td::BufferSlice proof_;
+    bool is_cached_ = false;
+  };
+
+  struct GeneratedCandidate {
+    BlockCandidate candidate;
+    bool is_cached = false;
   };
 
   class Callback {
@@ -76,7 +88,7 @@ class ValidatorSession : public td::actor::Actor {
     virtual void on_candidate(td::uint32 round, PublicKey source, ValidatorSessionRootHash root_hash,
                               td::BufferSlice data, td::BufferSlice collated_data,
                               td::Promise<CandidateDecision> promise) = 0;
-    virtual void on_generate_slot(td::uint32 round, td::Promise<BlockCandidate> promise) = 0;
+    virtual void on_generate_slot(td::uint32 round, td::Promise<GeneratedCandidate> promise) = 0;
     virtual void on_block_committed(td::uint32 round, PublicKey source, ValidatorSessionRootHash root_hash,
                                     ValidatorSessionFileHash file_hash, td::BufferSlice data,
                                     std::vector<std::pair<PublicKeyHash, td::BufferSlice>> signatures,
diff --git a/validator-session/validator-session.hpp b/validator-session/validator-session.hpp
index 619f7178..005292c0 100644
--- a/validator-session/validator-session.hpp
+++ b/validator-session/validator-session.hpp
@@ -159,10 +159,19 @@ class ValidatorSessionImpl : public ValidatorSession {
   bool compress_block_candidates_ = false;
 
   ValidatorSessionStats cur_stats_;
+  bool stats_inited_ = false;
+  std::map<std::pair<td::uint32, ValidatorSessionCandidateId>, std::vector<td::uint32>>
+      stats_pending_approve_;  // round, candidate_id -> approvers
+  std::map<std::pair<td::uint32, ValidatorSessionCandidateId>, std::vector<td::uint32>>
+      stats_pending_sign_;  // round, candidate_id -> signers
   void stats_init();
   void stats_add_round();
-  void stats_set_candidate_status(td::uint32 round, PublicKeyHash src, ValidatorSessionCandidateId candidate_id,
-                                  int status, std::string comment = "");
+  ValidatorSessionStats::Producer *stats_get_candidate_stat(
+      td::uint32 round, PublicKeyHash src,
+      ValidatorSessionCandidateId candidate_id = ValidatorSessionCandidateId::zero());
+  ValidatorSessionStats::Producer *stats_get_candidate_stat_by_id(td::uint32 round,
+                                                                  ValidatorSessionCandidateId candidate_id);
+  void stats_process_action(td::uint32 node_id, ton_api::validatorSession_round_Message &action);
 
  public:
   ValidatorSessionImpl(catchain::CatChainSessionId session_id, ValidatorSessionOptions opts, PublicKeyHash local_id,
@@ -190,17 +199,16 @@ class ValidatorSessionImpl : public ValidatorSession {
   void process_query(PublicKeyHash src, td::BufferSlice data, td::Promise<td::BufferSlice> promise);
 
   void try_approve_block(const SentBlock *block);
-  void try_sign();
 
-  void candidate_decision_fail(td::uint32 round, ValidatorSessionCandidateId hash, std::string result,
-                               td::uint32 src, td::BufferSlice proof);
+  void candidate_decision_fail(td::uint32 round, ValidatorSessionCandidateId hash, std::string result, td::uint32 src,
+                               td::BufferSlice proof, double validation_time, bool validation_cached);
   void candidate_decision_ok(td::uint32 round, ValidatorSessionCandidateId hash, RootHash root_hash, FileHash file_hash,
-                             td::uint32 src, td::uint32 ok_from);
+                             td::uint32 src, td::uint32 ok_from, double validation_time, bool validation_cached);
   void candidate_approved_signed(td::uint32 round, ValidatorSessionCandidateId hash, td::uint32 ok_from,
                                  td::BufferSlice signature);
 
   void generated_block(td::uint32 round, ValidatorSessionRootHash root_hash, td::BufferSlice data,
-                       td::BufferSlice collated);
+                       td::BufferSlice collated, double collation_time, bool collation_cached);
   void signed_block(td::uint32 round, ValidatorSessionCandidateId hash, td::BufferSlice signature);
 
   void end_request(td::uint32 round, ValidatorSessionCandidateId block_id) {
diff --git a/validator/manager.cpp b/validator/manager.cpp
index d88a5015..37281cc9 100644
--- a/validator/manager.cpp
+++ b/validator/manager.cpp
@@ -2714,8 +2714,12 @@ void ValidatorManagerImpl::log_validator_session_stats(BlockIdExt block_id,
     std::vector<tl_object_ptr<ton_api::validatorSession_statsProducer>> producers;
     for (const auto &producer : round.producers) {
       producers.push_back(create_tl_object<ton_api::validatorSession_statsProducer>(
-          producer.id.bits256_value(), producer.candidate_id, producer.block_status, producer.block_timestamp,
-          producer.comment));
+          producer.id.bits256_value(), producer.candidate_id, producer.block_status, producer.comment,
+          producer.block_timestamp, producer.is_accepted, producer.is_ours, producer.got_submit_at,
+          producer.collation_time, producer.collated_at, producer.collation_cached, producer.validation_time,
+          producer.validated_at, producer.validation_cached, producer.gen_utime, producer.approved_weight,
+          producer.approved_33pct_at, producer.approved_66pct_at, producer.signed_weight, producer.signed_33pct_at,
+          producer.signed_66pct_at, producer.serialize_time, producer.deserialize_time, producer.serialized_size));
     }
     rounds.push_back(create_tl_object<ton_api::validatorSession_statsRound>(round.timestamp, std::move(producers)));
   }
diff --git a/validator/validator-group.cpp b/validator/validator-group.cpp
index 05628ef5..5193e523 100644
--- a/validator/validator-group.cpp
+++ b/validator/validator-group.cpp
@@ -27,7 +27,8 @@ namespace ton {
 
 namespace validator {
 
-void ValidatorGroup::generate_block_candidate(td::uint32 round_id, td::Promise<BlockCandidate> promise) {
+void ValidatorGroup::generate_block_candidate(
+    td::uint32 round_id, td::Promise<validatorsession::ValidatorSession::GeneratedCandidate> promise) {
   if (round_id > last_known_round_id_) {
     last_known_round_id_ = round_id;
   }
@@ -37,14 +38,18 @@ void ValidatorGroup::generate_block_candidate(td::uint32 round_id, td::Promise<B
   }
   if (cached_collated_block_) {
     if (cached_collated_block_->result) {
-      promise.set_result(cached_collated_block_->result.value().clone());
+      promise.set_value({cached_collated_block_->result.value().clone(), true});
     } else {
-      cached_collated_block_->promises.push_back(std::move(promise));
+      cached_collated_block_->promises.push_back(promise.wrap([](BlockCandidate &&res) {
+        return validatorsession::ValidatorSession::GeneratedCandidate{std::move(res), true};
+      }));
     }
     return;
   }
   cached_collated_block_ = std::make_shared<CachedCollatedBlock>();
-  cached_collated_block_->promises.push_back(std::move(promise));
+  cached_collated_block_->promises.push_back(promise.wrap([](BlockCandidate &&res) {
+    return validatorsession::ValidatorSession::GeneratedCandidate{std::move(res), false};
+  }));
   run_collate_query(
       shard_, min_ts_, min_masterchain_block_id_, prev_block_ids_,
       Ed25519_PublicKey{local_id_full_.ed25519_value().raw()}, validator_set_, manager_, td::Timestamp::in(10.0),
@@ -73,7 +78,7 @@ void ValidatorGroup::generated_block_candidate(std::shared_ptr<CachedCollatedBlo
 }
 
 void ValidatorGroup::validate_block_candidate(td::uint32 round_id, BlockCandidate block,
-                                              td::Promise<UnixTime> promise) {
+                                              td::Promise<std::pair<UnixTime, bool>> promise) {
   if (round_id > last_known_round_id_) {
     last_known_round_id_ = round_id;
   }
@@ -88,7 +93,7 @@ void ValidatorGroup::validate_block_candidate(td::uint32 round_id, BlockCandidat
   CacheKey cache_key = block_to_cache_key(block);
   auto it = approved_candidates_cache_.find(cache_key);
   if (it != approved_candidates_cache_.end()) {
-    promise.set_result(it->second);
+    promise.set_value({it->second, true});
     return;
   }
 
@@ -113,7 +118,7 @@ void ValidatorGroup::validate_block_candidate(td::uint32 round_id, BlockCandidat
                                     ts);
             td::actor::send_closure(SelfId, &ValidatorGroup::add_available_block_candidate, block.pubkey.as_bits256(),
                                     block.id, block.collated_file_hash);
-            promise.set_result(ts);
+            promise.set_value({ts, false});
           },
           [&](CandidateReject reject) {
             promise.set_error(
@@ -247,15 +252,18 @@ std::unique_ptr<validatorsession::ValidatorSession::Callback> ValidatorGroup::ma
     void on_candidate(td::uint32 round, PublicKey source, validatorsession::ValidatorSessionRootHash root_hash,
                       td::BufferSlice data, td::BufferSlice collated_data,
                       td::Promise<validatorsession::ValidatorSession::CandidateDecision> promise) override {
-      auto P = td::PromiseCreator::lambda([id = id_, promise = std::move(promise)](td::Result<td::uint32> R) mutable {
-        if (R.is_ok()) {
-          promise.set_value(validatorsession::ValidatorSession::CandidateDecision{R.move_as_ok()});
-        } else {
-          auto S = R.move_as_error();
-          promise.set_value(
-              validatorsession::ValidatorSession::CandidateDecision{S.message().c_str(), td::BufferSlice()});
-        }
-      });
+      auto P =
+          td::PromiseCreator::lambda([promise = std::move(promise)](td::Result<std::pair<td::uint32, bool>> R) mutable {
+            if (R.is_ok()) {
+              validatorsession::ValidatorSession::CandidateDecision decision(R.ok().first);
+              decision.set_is_cached(R.ok().second);
+              promise.set_value(std::move(decision));
+            } else {
+              auto S = R.move_as_error();
+              promise.set_value(
+                  validatorsession::ValidatorSession::CandidateDecision{S.message().c_str(), td::BufferSlice()});
+            }
+          });
 
       BlockCandidate candidate{Ed25519_PublicKey{source.ed25519_value().raw()},
                                BlockIdExt{0, 0, 0, root_hash, sha256_bits256(data.as_slice())},
@@ -264,7 +272,8 @@ std::unique_ptr<validatorsession::ValidatorSession::Callback> ValidatorGroup::ma
       td::actor::send_closure(id_, &ValidatorGroup::validate_block_candidate, round, std::move(candidate),
                               std::move(P));
     }
-    void on_generate_slot(td::uint32 round, td::Promise<BlockCandidate> promise) override {
+    void on_generate_slot(td::uint32 round,
+                          td::Promise<validatorsession::ValidatorSession::GeneratedCandidate> promise) override {
       td::actor::send_closure(id_, &ValidatorGroup::generate_block_candidate, round, std::move(promise));
     }
     void on_block_committed(td::uint32 round, PublicKey source, validatorsession::ValidatorSessionRootHash root_hash,
diff --git a/validator/validator-group.hpp b/validator/validator-group.hpp
index 2dbff8de..cb3f7a63 100644
--- a/validator/validator-group.hpp
+++ b/validator/validator-group.hpp
@@ -34,8 +34,10 @@ class ValidatorManager;
 
 class ValidatorGroup : public td::actor::Actor {
  public:
-  void generate_block_candidate(td::uint32 round_id, td::Promise<BlockCandidate> promise);
-  void validate_block_candidate(td::uint32 round_id, BlockCandidate block, td::Promise<td::uint32> promise);
+  void generate_block_candidate(td::uint32 round_id,
+                                td::Promise<validatorsession::ValidatorSession::GeneratedCandidate> promise);
+  void validate_block_candidate(td::uint32 round_id, BlockCandidate block,
+                                td::Promise<std::pair<UnixTime, bool>> promise);
   void accept_block_candidate(td::uint32 round_id, PublicKeyHash src, td::BufferSlice block, RootHash root_hash,
                               FileHash file_hash, std::vector<BlockSignature> signatures,
                               std::vector<BlockSignature> approve_signatures,