diff --git a/adnl/adnl-ext-client.hpp b/adnl/adnl-ext-client.hpp
index 133397255..1dd7d2ba3 100644
--- a/adnl/adnl-ext-client.hpp
+++ b/adnl/adnl-ext-client.hpp
@@ -43,7 +43,10 @@ class AdnlOutboundConnection : public AdnlExtConnection {
  public:
   AdnlOutboundConnection(td::SocketFd fd, std::unique_ptr<AdnlExtConnection::Callback> callback, AdnlNodeIdFull dst,
                          td::actor::ActorId<AdnlExtClientImpl> ext_client)
-      : AdnlExtConnection(std::move(fd), std::move(callback), true), dst_(std::move(dst)), ext_client_(ext_client) {
+      : AdnlExtConnection(std::move(fd), std::move(callback), true)
+      , dst_(std::move(dst))
+      , local_id_(privkeys::Ed25519::random())
+      , ext_client_(ext_client) {
   }
   AdnlOutboundConnection(td::SocketFd fd, std::unique_ptr<AdnlExtConnection::Callback> callback, AdnlNodeIdFull dst,
                          PrivateKey local_id, td::actor::ActorId<AdnlExtClientImpl> ext_client)
diff --git a/create-hardfork/create-hardfork.cpp b/create-hardfork/create-hardfork.cpp
index 640bc049b..31a60b56a 100644
--- a/create-hardfork/create-hardfork.cpp
+++ b/create-hardfork/create-hardfork.cpp
@@ -275,6 +275,9 @@ class HardforkCreator : public td::actor::Actor {
 
       void new_key_block(ton::validator::BlockHandle handle) override {
       }
+      void send_validator_telemetry(ton::PublicKeyHash key,
+                                    ton::tl_object_ptr<ton::ton_api::validator_telemetry> telemetry) override {
+      }
     };
 
     td::actor::send_closure(validator_manager_, &ton::validator::ValidatorManagerInterface::install_callback,
diff --git a/overlay/overlay-manager.cpp b/overlay/overlay-manager.cpp
index ff6ad2c99..f24c6cbc2 100644
--- a/overlay/overlay-manager.cpp
+++ b/overlay/overlay-manager.cpp
@@ -68,6 +68,9 @@ void OverlayManager::register_overlay(adnl::AdnlNodeIdShort local_id, OverlayIdS
   }
   overlays_[local_id][overlay_id] = OverlayDescription{std::move(overlay), std::move(cert)};
 
+  if (!with_db_) {
+    return;
+  }
   auto P =
       td::PromiseCreator::lambda([id = overlays_[local_id][overlay_id].overlay.get()](td::Result<DbType::GetResult> R) {
         R.ensure();
@@ -417,13 +420,19 @@ OverlayManager::OverlayManager(std::string db_root, td::actor::ActorId<keyring::
 }
 
 void OverlayManager::start_up() {
-  std::shared_ptr<td::KeyValue> kv =
-      std::make_shared<td::RocksDb>(td::RocksDb::open(PSTRING() << db_root_ << "/overlays").move_as_ok());
-  db_ = DbType{std::move(kv)};
+  if (!db_root_.empty()) {
+    with_db_ = true;
+    std::shared_ptr<td::KeyValue> kv =
+        std::make_shared<td::RocksDb>(td::RocksDb::open(PSTRING() << db_root_ << "/overlays").move_as_ok());
+    db_ = DbType{std::move(kv)};
+  }
 }
 
 void OverlayManager::save_to_db(adnl::AdnlNodeIdShort local_id, OverlayIdShort overlay_id,
                                 std::vector<OverlayNode> nodes) {
+  if (!with_db_) {
+    return;
+  }
   std::vector<tl_object_ptr<ton_api::overlay_node>> nodes_vec;
   for (auto &n : nodes) {
     nodes_vec.push_back(n.tl());
diff --git a/overlay/overlay-manager.h b/overlay/overlay-manager.h
index 12206e048..68b033a3b 100644
--- a/overlay/overlay-manager.h
+++ b/overlay/overlay-manager.h
@@ -131,6 +131,7 @@ class OverlayManager : public Overlays {
   td::actor::ActorId<dht::Dht> dht_node_;
 
   using DbType = td::KeyValueAsync<td::Bits256, td::BufferSlice>;
+  bool with_db_ = false;
   DbType db_;
 
   class AdnlCallback : public adnl::Adnl::Callback {
diff --git a/overlay/overlay-peers.cpp b/overlay/overlay-peers.cpp
index 00b508fd4..7def4a2d3 100644
--- a/overlay/overlay-peers.cpp
+++ b/overlay/overlay-peers.cpp
@@ -213,7 +213,7 @@ void OverlayImpl::add_peer(OverlayNode node) {
     peer_list_.peers_.insert(id, OverlayPeer(std::move(node)));
     del_some_peers();
     auto X = peer_list_.peers_.get(id);
-    if (X != nullptr && peer_list_.neighbours_.size() < max_neighbours() &&
+    if (X != nullptr && !X->is_neighbour() && peer_list_.neighbours_.size() < max_neighbours() &&
         !(X->get_node()->flags() & OverlayMemberFlags::DoNotReceiveBroadcasts) && X->get_id() != local_id_) {
       peer_list_.neighbours_.push_back(X->get_id());
       X->set_neighbour(true);
@@ -440,7 +440,7 @@ void OverlayImpl::update_neighbours(td::uint32 nodes_to_change) {
       VLOG(OVERLAY_INFO) << this << ": adding new neighbour " << X->get_id();
       peer_list_.neighbours_.push_back(X->get_id());
       X->set_neighbour(true);
-    } else {
+    } else if (X->is_alive()) {
       CHECK(nodes_to_change > 0);
       auto i = td::Random::fast(0, static_cast<td::uint32>(peer_list_.neighbours_.size()) - 1);
       auto Y = peer_list_.peers_.get(peer_list_.neighbours_[i]);
diff --git a/overlay/overlay.cpp b/overlay/overlay.cpp
index c9da6f5c3..429c6a9c8 100644
--- a/overlay/overlay.cpp
+++ b/overlay/overlay.cpp
@@ -347,7 +347,12 @@ void OverlayImpl::alarm() {
       update_db_at_ = td::Timestamp::in(60.0);
     }
 
-    update_neighbours(0);
+    if (update_neighbours_at_.is_in_past()) {
+      update_neighbours(2);
+      update_neighbours_at_ = td::Timestamp::in(td::Random::fast(30.0, 120.0));
+    } else {
+      update_neighbours(0);
+    }
     alarm_timestamp() = td::Timestamp::in(1.0);
   } else {
     update_neighbours(0);
diff --git a/overlay/overlay.hpp b/overlay/overlay.hpp
index ba0fae46d..41a04dec2 100644
--- a/overlay/overlay.hpp
+++ b/overlay/overlay.hpp
@@ -391,6 +391,7 @@ class OverlayImpl : public Overlay {
   td::Timestamp next_dht_store_query_ = td::Timestamp::in(1.0);
   td::Timestamp update_db_at_;
   td::Timestamp update_throughput_at_;
+  td::Timestamp update_neighbours_at_;
   td::Timestamp last_throughput_update_;
 
   std::unique_ptr<Overlays::Callback> callback_;
diff --git a/tdutils/td/utils/port/Stat.cpp b/tdutils/td/utils/port/Stat.cpp
index 816d622e4..73b006084 100644
--- a/tdutils/td/utils/port/Stat.cpp
+++ b/tdutils/td/utils/port/Stat.cpp
@@ -472,4 +472,45 @@ Result<TotalMemStat> get_total_mem_stat() {
 #endif
 }
 
+Result<uint32> get_cpu_cores() {
+#if TD_LINUX
+  uint32 result = 0;
+  TRY_RESULT(fd, FileFd::open("/proc/cpuinfo", FileFd::Read));
+  SCOPE_EXIT {
+    fd.close();
+  };
+  std::string data;
+  char buf[10000];
+  while (true) {
+    TRY_RESULT(size, fd.read(MutableSlice{buf, sizeof(buf) - 1}));
+    if (size == 0) {
+      break;
+    }
+    buf[size] = '\0';
+    data += buf;
+  }
+  size_t i = 0;
+  while (i < data.size()) {
+    const char *line_begin = data.data() + i;
+    while (i < data.size() && data[i] != '\n') {
+      ++i;
+    }
+    auto line_end = data.data() + i;
+    ++i;
+    Slice line{line_begin, line_end};
+    size_t j = 0;
+    while (j < line.size() && line[j] != ' ' && line[j] != '\t' && line[j] != ':') {
+      ++j;
+    }
+    Slice name = line.substr(0, j);
+    if (name == "processor") {
+      ++result;
+    }
+  }
+  return result;
+#else
+  return Status::Error("Not supported");
+#endif
+}
+
 }  // namespace td
diff --git a/tdutils/td/utils/port/Stat.h b/tdutils/td/utils/port/Stat.h
index ab97be0f1..82e1832a0 100644
--- a/tdutils/td/utils/port/Stat.h
+++ b/tdutils/td/utils/port/Stat.h
@@ -70,4 +70,6 @@ struct TotalMemStat {
 };
 Result<TotalMemStat> get_total_mem_stat() TD_WARN_UNUSED_RESULT;
 
+Result<uint32> get_cpu_cores() TD_WARN_UNUSED_RESULT;
+
 }  // namespace td
diff --git a/test/test-ton-collator.cpp b/test/test-ton-collator.cpp
index e2ed48ac0..118248519 100644
--- a/test/test-ton-collator.cpp
+++ b/test/test-ton-collator.cpp
@@ -376,6 +376,9 @@ class TestNode : public td::actor::Actor {
 
       void new_key_block(ton::validator::BlockHandle handle) override {
       }
+      void send_validator_telemetry(ton::PublicKeyHash key,
+                                    ton::tl_object_ptr<ton::ton_api::validator_telemetry> telemetry) override {
+      }
     };
 
     td::actor::send_closure(validator_manager_, &ton::validator::ValidatorManagerInterface::install_callback,
diff --git a/tl/generate/scheme/ton_api.tl b/tl/generate/scheme/ton_api.tl
index a60df2246..16f48345c 100644
--- a/tl/generate/scheme/ton_api.tl
+++ b/tl/generate/scheme/ton_api.tl
@@ -588,6 +588,10 @@ validator.group workchain:int shard:long catchain_seqno:int config_hash:int256 m
 validator.groupEx workchain:int shard:long vertical_seqno:int catchain_seqno:int config_hash:int256 members:(vector validator.groupMember) = validator.Group; 
 validator.groupNew workchain:int shard:long vertical_seqno:int last_key_block_seqno:int catchain_seqno:int config_hash:int256 members:(vector validator.groupMember) = validator.Group; 
 
+validator.telemetry flags:# timestamp:double adnl_id:int256
+    node_version:string os_version:string node_started_at:int
+    ram_size:long cpu_cores:int node_threads:int = validator.Telemetry;
+
 ---functions---
 
 
diff --git a/tl/generate/scheme/ton_api.tlo b/tl/generate/scheme/ton_api.tlo
index 2bc953720..1689260bc 100644
Binary files a/tl/generate/scheme/ton_api.tlo and b/tl/generate/scheme/ton_api.tlo differ
diff --git a/tl/generate/scheme/tonlib_api.tl b/tl/generate/scheme/tonlib_api.tl
index 5110d6ecd..31ca6fd40 100644
--- a/tl/generate/scheme/tonlib_api.tl
+++ b/tl/generate/scheme/tonlib_api.tl
@@ -53,7 +53,7 @@ ton.blockIdExt workchain:int32 shard:int64 seqno:int32 root_hash:bytes file_hash
 extraCurrency id:int32 amount:int64 = ExtraCurrency;
 
 raw.fullAccountState balance:int64 extra_currencies:vector<extraCurrency> code:bytes data:bytes last_transaction_id:internal.transactionId block_id:ton.blockIdExt frozen_hash:bytes sync_utime:int53 = raw.FullAccountState;
-raw.message source:accountAddress destination:accountAddress value:int64 extra_currencies:vector<extraCurrency> fwd_fee:int64 ihr_fee:int64 created_lt:int64 body_hash:bytes msg_data:msg.Data = raw.Message;
+raw.message hash:bytes source:accountAddress destination:accountAddress value:int64 extra_currencies:vector<extraCurrency> fwd_fee:int64 ihr_fee:int64 created_lt:int64 body_hash:bytes msg_data:msg.Data = raw.Message;
 raw.transaction address:accountAddress utime:int53 data:bytes transaction_id:internal.transactionId fee:int64 storage_fee:int64 other_fee:int64 in_msg:raw.message out_msgs:vector<raw.message> = raw.Transaction;
 raw.transactions transactions:vector<raw.transaction> previous_transaction_id:internal.transactionId = raw.Transactions;
 
diff --git a/tl/generate/scheme/tonlib_api.tlo b/tl/generate/scheme/tonlib_api.tlo
index 70c08459c..10b9ed8db 100644
Binary files a/tl/generate/scheme/tonlib_api.tlo and b/tl/generate/scheme/tonlib_api.tlo differ
diff --git a/tonlib/tonlib/TonlibClient.cpp b/tonlib/tonlib/TonlibClient.cpp
index 19d5f0d0a..b9ff4899c 100644
--- a/tonlib/tonlib/TonlibClient.cpp
+++ b/tonlib/tonlib/TonlibClient.cpp
@@ -3032,6 +3032,7 @@ struct ToRawTransactions {
     }
     auto body_cell = vm::CellBuilder().append_cellslice(*body).finalize();
     auto body_hash = body_cell->get_hash().as_slice().str();
+    auto msg_hash = cell->get_hash().as_slice().str();
 
     td::Ref<vm::Cell> init_state_cell;
     auto& init_state_cs = message.init.write();
@@ -3101,6 +3102,7 @@ struct ToRawTransactions {
         auto created_lt = static_cast<td::int64>(msg_info.created_lt);
 
         return tonlib_api::make_object<tonlib_api::raw_message>(
+            msg_hash,
             tonlib_api::make_object<tonlib_api::accountAddress>(src),
             tonlib_api::make_object<tonlib_api::accountAddress>(std::move(dest)), balance,
             std::move(extra_currencies), fwd_fee, ihr_fee, created_lt, std::move(body_hash),
@@ -3113,6 +3115,7 @@ struct ToRawTransactions {
         }
         TRY_RESULT(dest, to_std_address(msg_info.dest));
         return tonlib_api::make_object<tonlib_api::raw_message>(
+            msg_hash,
             tonlib_api::make_object<tonlib_api::accountAddress>(),
             tonlib_api::make_object<tonlib_api::accountAddress>(std::move(dest)), 0,
             std::vector<tonlib_api::object_ptr<tonlib_api::extraCurrency>>{}, 0, 0, 0, std::move(body_hash),
@@ -3126,6 +3129,7 @@ struct ToRawTransactions {
         TRY_RESULT(src, to_std_address(msg_info.src));
         auto created_lt = static_cast<td::int64>(msg_info.created_lt);
         return tonlib_api::make_object<tonlib_api::raw_message>(
+            msg_hash,
             tonlib_api::make_object<tonlib_api::accountAddress>(src),
             tonlib_api::make_object<tonlib_api::accountAddress>(), 0,
             std::vector<tonlib_api::object_ptr<tonlib_api::extraCurrency>>{}, 0, 0, created_lt, std::move(body_hash),
diff --git a/validator-engine/validator-engine.cpp b/validator-engine/validator-engine.cpp
index 867a72d0c..78d3ba2b5 100644
--- a/validator-engine/validator-engine.cpp
+++ b/validator-engine/validator-engine.cpp
@@ -2024,6 +2024,10 @@ void ValidatorEngine::start_full_node() {
                               [](td::Unit) {});
     }
     load_custom_overlays_config();
+    if (!validator_telemetry_filename_.empty()) {
+      td::actor::send_closure(full_node_, &ton::validator::fullnode::FullNode::set_validator_telemetry_filename,
+                              validator_telemetry_filename_);
+    }
   } else {
     started_full_node();
   }
@@ -4490,6 +4494,15 @@ int main(int argc, char *argv[]) {
         acts.push_back(
             [&x]() { td::actor::send_closure(x, &ValidatorEngine::set_fast_state_serializer_enabled, true); });
       });
+  p.add_option(
+      '\0', "collect-validator-telemetry",
+      "store validator telemetry from private block overlay to a given file (json format)",
+      [&](td::Slice s) {
+        acts.push_back(
+            [&x, s = s.str()]() {
+              td::actor::send_closure(x, &ValidatorEngine::set_validator_telemetry_filename, s);
+            });
+      });
   auto S = p.run(argc, argv);
   if (S.is_error()) {
     LOG(ERROR) << "failed to parse options: " << S.move_as_error();
diff --git a/validator-engine/validator-engine.hpp b/validator-engine/validator-engine.hpp
index f1120ce1b..65af61788 100644
--- a/validator-engine/validator-engine.hpp
+++ b/validator-engine/validator-engine.hpp
@@ -225,6 +225,7 @@ class ValidatorEngine : public td::actor::Actor {
   ton::BlockSeqno truncate_seqno_{0};
   std::string session_logs_file_;
   bool fast_state_serializer_enabled_ = false;
+  std::string validator_telemetry_filename_;
   bool not_all_shards_ = false;
   std::vector<ton::ShardIdFull> add_shard_cmds_;
 
@@ -315,6 +316,9 @@ class ValidatorEngine : public td::actor::Actor {
   void set_fast_state_serializer_enabled(bool value) {
     fast_state_serializer_enabled_ = value;
   }
+  void set_validator_telemetry_filename(std::string value) {
+    validator_telemetry_filename_ = std::move(value);
+  }
   void set_not_all_shards() {
     not_all_shards_ = true;
   }
diff --git a/validator/CMakeLists.txt b/validator/CMakeLists.txt
index d5ba00e39..b7f3787c4 100644
--- a/validator/CMakeLists.txt
+++ b/validator/CMakeLists.txt
@@ -56,6 +56,7 @@ set(VALIDATOR_HEADERS
   
   import-db-slice.hpp
   queue-size-counter.hpp
+  validator-telemetry.hpp
 
   manager-disk.h
   manager-disk.hpp
@@ -82,6 +83,7 @@ set(VALIDATOR_SOURCE
   validator-group.cpp
   validator-options.cpp
   queue-size-counter.cpp
+  validator-telemetry.cpp
 
   downloaders/wait-block-data.cpp
   downloaders/wait-block-state.cpp
diff --git a/validator/full-node-private-overlay.cpp b/validator/full-node-private-overlay.cpp
index e5ea1f0be..1acfbd4ed 100644
--- a/validator/full-node-private-overlay.cpp
+++ b/validator/full-node-private-overlay.cpp
@@ -19,6 +19,9 @@
 #include "common/delay.h"
 #include "common/checksum.h"
 #include "full-node-serializer.hpp"
+#include "auto/tl/ton_api_json.h"
+#include "td/utils/JsonBuilder.h"
+#include "tl/tl_json.h"
 
 namespace ton::validator::fullnode {
 
@@ -85,15 +88,52 @@ void FullNodePrivateBlockOverlay::process_block_candidate_broadcast(PublicKeyHas
                           validator_set_hash, std::move(data));
 }
 
+void FullNodePrivateBlockOverlay::process_telemetry_broadcast(
+    PublicKeyHash src, const tl_object_ptr<ton_api::validator_telemetry>& telemetry) {
+  if (telemetry->adnl_id_ != src.bits256_value()) {
+    VLOG(FULL_NODE_WARNING) << "Invalid telemetry broadcast from " << src << ": adnl_id mismatch";
+    return;
+  }
+  auto now = (td::int32)td::Clocks::system();
+  if (telemetry->timestamp_ < now - 60) {
+    VLOG(FULL_NODE_WARNING) << "Invalid telemetry broadcast from " << src << ": too old ("
+                            << now - telemetry->timestamp_ << "s ago)";
+    return;
+  }
+  if (telemetry->timestamp_ > now + 60) {
+    VLOG(FULL_NODE_WARNING) << "Invalid telemetry broadcast from " << src << ": too new ("
+                            << telemetry->timestamp_ - now << "s in the future)";
+    return;
+  }
+  VLOG(FULL_NODE_DEBUG) << "Got telemetry broadcast from " << src;
+  auto s = td::json_encode<std::string>(td::ToJson(*telemetry), false);
+  std::erase_if(s, [](char c) {
+    return c == '\n' || c == '\r';
+  });
+  telemetry_file_ << s << "\n";
+  telemetry_file_.flush();
+  if (telemetry_file_.fail()) {
+    VLOG(FULL_NODE_WARNING) << "Failed to write telemetry to file";
+  }
+}
+
 void FullNodePrivateBlockOverlay::receive_broadcast(PublicKeyHash src, td::BufferSlice broadcast) {
   if (adnl::AdnlNodeIdShort{src} == local_id_) {
     return;
   }
   auto B = fetch_tl_object<ton_api::tonNode_Broadcast>(std::move(broadcast), true);
   if (B.is_error()) {
+    if (collect_telemetry_ && src != local_id_.pubkey_hash()) {
+      auto R = fetch_tl_prefix<ton_api::validator_telemetry>(broadcast, true);
+      if (R.is_ok()) {
+        process_telemetry_broadcast(src, R.ok());
+      }
+    }
     return;
   }
-  ton_api::downcast_call(*B.move_as_ok(), [src, Self = this](auto &obj) { Self->process_broadcast(src, obj); });
+  ton_api::downcast_call(*B.move_as_ok(), [src, Self = this](auto& obj) {
+    Self->process_broadcast(src, obj);
+  });
 }
 
 void FullNodePrivateBlockOverlay::send_shard_block_info(BlockIdExt block_id, CatchainSeqno cc_seqno,
@@ -144,6 +184,30 @@ void FullNodePrivateBlockOverlay::send_broadcast(BlockBroadcast broadcast) {
                           local_id_.pubkey_hash(), overlay::Overlays::BroadcastFlagAnySender(), B.move_as_ok());
 }
 
+void FullNodePrivateBlockOverlay::send_validator_telemetry(tl_object_ptr<ton_api::validator_telemetry> telemetry) {
+  process_telemetry_broadcast(local_id_.pubkey_hash(), telemetry);
+  auto data = serialize_tl_object(telemetry, true);
+  if (data.size() <= overlay::Overlays::max_simple_broadcast_size()) {
+    td::actor::send_closure(overlays_, &overlay::Overlays::send_broadcast_ex, local_id_, overlay_id_,
+                            local_id_.pubkey_hash(), 0, std::move(data));
+  } else {
+    td::actor::send_closure(overlays_, &overlay::Overlays::send_broadcast_fec_ex, local_id_, overlay_id_,
+                            local_id_.pubkey_hash(), 0, std::move(data));
+  }
+}
+
+void FullNodePrivateBlockOverlay::collect_validator_telemetry(std::string filename) {
+  if (collect_telemetry_) {
+    telemetry_file_.close();
+  }
+  collect_telemetry_ = true;
+  LOG(FULL_NODE_WARNING) << "Collecting validator telemetry to " << filename << " (local id: " << local_id_ << ")";
+  telemetry_file_.open(filename, std::ios_base::app);
+  if (!telemetry_file_.is_open()) {
+    LOG(WARNING) << "Cannot open file " << filename << " for validator telemetry";
+  }
+}
+
 void FullNodePrivateBlockOverlay::start_up() {
   std::sort(nodes_.begin(), nodes_.end());
   nodes_.erase(std::unique(nodes_.begin(), nodes_.end()), nodes_.end());
diff --git a/validator/full-node-private-overlay.hpp b/validator/full-node-private-overlay.hpp
index a0022fa03..1e29f8c93 100644
--- a/validator/full-node-private-overlay.hpp
+++ b/validator/full-node-private-overlay.hpp
@@ -17,6 +17,7 @@
 #pragma once
 
 #include "full-node.h"
+#include <fstream>
 
 namespace ton::validator::fullnode {
 
@@ -32,6 +33,8 @@ class FullNodePrivateBlockOverlay : public td::actor::Actor {
   void process_broadcast(PublicKeyHash src, ton_api::tonNode_newBlockCandidateBroadcastCompressed &query);
   void process_block_candidate_broadcast(PublicKeyHash src, ton_api::tonNode_Broadcast &query);
 
+  void process_telemetry_broadcast(PublicKeyHash src, const tl_object_ptr<ton_api::validator_telemetry>& telemetry);
+
   template <class T>
   void process_broadcast(PublicKeyHash, T &) {
     VLOG(FULL_NODE_WARNING) << "dropping unknown broadcast";
@@ -42,6 +45,9 @@ class FullNodePrivateBlockOverlay : public td::actor::Actor {
   void send_block_candidate(BlockIdExt block_id, CatchainSeqno cc_seqno, td::uint32 validator_set_hash,
                             td::BufferSlice data);
   void send_broadcast(BlockBroadcast broadcast);
+  void send_validator_telemetry(tl_object_ptr<ton_api::validator_telemetry> telemetry);
+
+  void collect_validator_telemetry(std::string filename);
 
   void set_config(FullNodeConfig config) {
     config_ = std::move(config);
@@ -91,6 +97,9 @@ class FullNodePrivateBlockOverlay : public td::actor::Actor {
 
   void try_init();
   void init();
+
+  bool collect_telemetry_ = false;
+  std::ofstream telemetry_file_;
 };
 
 class FullNodeCustomOverlay : public td::actor::Actor {
diff --git a/validator/full-node.cpp b/validator/full-node.cpp
index b08ba488a..c1173e445 100644
--- a/validator/full-node.cpp
+++ b/validator/full-node.cpp
@@ -70,6 +70,7 @@ void FullNodeImpl::del_permanent_key(PublicKeyHash key, td::Promise<td::Unit> pr
   }
   local_keys_.erase(key);
   private_block_overlays_.erase(key);
+  update_validator_telemetry_collector();
   for (auto &p : custom_overlays_) {
     update_custom_overlay(p.second);
   }
@@ -525,6 +526,15 @@ void FullNodeImpl::new_key_block(BlockHandle handle) {
   }
 }
 
+void FullNodeImpl::send_validator_telemetry(PublicKeyHash key, tl_object_ptr<ton_api::validator_telemetry> telemetry) {
+  auto it = private_block_overlays_.find(key);
+  if (it == private_block_overlays_.end()) {
+    VLOG(FULL_NODE_INFO) << "Cannot send validator telemetry for " << key << " : no private block overlay";
+    return;
+  }
+  td::actor::send_closure(it->second, &FullNodePrivateBlockOverlay::send_validator_telemetry, std::move(telemetry));
+}
+
 void FullNodeImpl::process_block_broadcast(BlockBroadcast broadcast) {
   send_block_broadcast_to_custom_overlays(broadcast);
   td::actor::send_closure(validator_manager_, &ValidatorManagerInterface::prevalidate_block, std::move(broadcast),
@@ -547,6 +557,24 @@ void FullNodeImpl::process_block_candidate_broadcast(BlockIdExt block_id, Catcha
                           std::move(data));
 }
 
+void FullNodeImpl::set_validator_telemetry_filename(std::string value) {
+  validator_telemetry_filename_ = std::move(value);
+  update_validator_telemetry_collector();
+}
+
+void FullNodeImpl::update_validator_telemetry_collector() {
+  if (validator_telemetry_filename_.empty() || private_block_overlays_.empty()) {
+    validator_telemetry_collector_key_ = PublicKeyHash::zero();
+    return;
+  }
+  if (!private_block_overlays_.contains(validator_telemetry_collector_key_)) {
+    auto it = private_block_overlays_.begin();
+    validator_telemetry_collector_key_ = it->first;
+    td::actor::send_closure(it->second, &FullNodePrivateBlockOverlay::collect_validator_telemetry,
+                            validator_telemetry_filename_);
+  }
+}
+
 void FullNodeImpl::start_up() {
   update_shard_actor(ShardIdFull{masterchainId}, true);
   if (local_id_.is_zero()) {
@@ -621,6 +649,9 @@ void FullNodeImpl::start_up() {
     void new_key_block(BlockHandle handle) override {
       td::actor::send_closure(id_, &FullNodeImpl::new_key_block, std::move(handle));
     }
+    void send_validator_telemetry(PublicKeyHash key, tl_object_ptr<ton_api::validator_telemetry> telemetry) override {
+      td::actor::send_closure(id_, &FullNodeImpl::send_validator_telemetry, key, std::move(telemetry));
+    }
 
     explicit Callback(td::actor::ActorId<FullNodeImpl> id) : id_(id) {
     }
@@ -639,6 +670,7 @@ void FullNodeImpl::update_private_overlays() {
   }
 
   private_block_overlays_.clear();
+  update_validator_telemetry_collector();
   if (local_keys_.empty()) {
     return;
   }
@@ -657,6 +689,7 @@ void FullNodeImpl::create_private_block_overlay(PublicKeyHash key) {
     private_block_overlays_[key] = td::actor::create_actor<FullNodePrivateBlockOverlay>(
         "BlocksPrivateOverlay", current_validators_[key], std::move(nodes), zero_state_file_hash_, config_, keyring_,
         adnl_, rldp_, rldp2_, overlays_, validator_manager_, actor_id(this));
+    update_validator_telemetry_collector();
   }
 }
 
diff --git a/validator/full-node.h b/validator/full-node.h
index bddeda5aa..73ecbd720 100644
--- a/validator/full-node.h
+++ b/validator/full-node.h
@@ -92,6 +92,8 @@ class FullNode : public td::actor::Actor {
   virtual void process_block_candidate_broadcast(BlockIdExt block_id, CatchainSeqno cc_seqno,
                                                  td::uint32 validator_set_hash, td::BufferSlice data) = 0;
 
+  virtual void set_validator_telemetry_filename(std::string value) = 0;
+
   static constexpr td::uint32 max_block_size() {
     return 4 << 20;
   }
diff --git a/validator/full-node.hpp b/validator/full-node.hpp
index 1a5e7e3ad..b82dd473a 100644
--- a/validator/full-node.hpp
+++ b/validator/full-node.hpp
@@ -82,11 +82,14 @@ class FullNodeImpl : public FullNode {
 
   void got_key_block_config(td::Ref<ConfigHolder> config);
   void new_key_block(BlockHandle handle);
+  void send_validator_telemetry(PublicKeyHash key, tl_object_ptr<ton_api::validator_telemetry> telemetry);
 
   void process_block_broadcast(BlockBroadcast broadcast) override;
   void process_block_candidate_broadcast(BlockIdExt block_id, CatchainSeqno cc_seqno, td::uint32 validator_set_hash,
                                          td::BufferSlice data) override;
 
+  void set_validator_telemetry_filename(std::string value) override;
+
   void start_up() override;
 
   FullNodeImpl(PublicKeyHash local_id, adnl::AdnlNodeIdShort adnl_id, FileHash zero_state_file_hash,
@@ -152,6 +155,11 @@ class FullNodeImpl : public FullNode {
   void send_block_broadcast_to_custom_overlays(const BlockBroadcast& broadcast);
   void send_block_candidate_broadcast_to_custom_overlays(const BlockIdExt& block_id, CatchainSeqno cc_seqno,
                                                          td::uint32 validator_set_hash, const td::BufferSlice& data);
+
+  std::string validator_telemetry_filename_;
+  PublicKeyHash validator_telemetry_collector_key_ = PublicKeyHash::zero();
+
+  void update_validator_telemetry_collector();
 };
 
 }  // namespace fullnode
diff --git a/validator/impl/validator-set.cpp b/validator/impl/validator-set.cpp
index 629337cf8..d4b0d647b 100644
--- a/validator/impl/validator-set.cpp
+++ b/validator/impl/validator-set.cpp
@@ -28,14 +28,14 @@ namespace ton {
 namespace validator {
 using td::Ref;
 
-const ValidatorDescr *ValidatorSetQ::find_validator(const NodeIdShort &id) const {
+const ValidatorDescr *ValidatorSetQ::get_validator(const NodeIdShort &id) const {
   auto it =
       std::lower_bound(ids_map_.begin(), ids_map_.end(), id, [](const auto &p, const auto &x) { return p.first < x; });
   return it < ids_map_.end() && it->first == id ? &ids_[it->second] : nullptr;
 }
 
 bool ValidatorSetQ::is_validator(NodeIdShort id) const {
-  return find_validator(id);
+  return get_validator(id);
 }
 
 td::Result<ValidatorWeight> ValidatorSetQ::check_signatures(RootHash root_hash, FileHash file_hash,
@@ -53,7 +53,7 @@ td::Result<ValidatorWeight> ValidatorSetQ::check_signatures(RootHash root_hash,
     }
     nodes.insert(sig.node);
 
-    auto vdescr = find_validator(sig.node);
+    auto vdescr = get_validator(sig.node);
     if (!vdescr) {
       return td::Status::Error(ErrorCode::protoviolation, "unknown node to sign");
     }
@@ -84,7 +84,7 @@ td::Result<ValidatorWeight> ValidatorSetQ::check_approve_signatures(RootHash roo
     }
     nodes.insert(sig.node);
 
-    auto vdescr = find_validator(sig.node);
+    auto vdescr = get_validator(sig.node);
     if (!vdescr) {
       return td::Status::Error(ErrorCode::protoviolation, "unknown node to sign");
     }
diff --git a/validator/impl/validator-set.hpp b/validator/impl/validator-set.hpp
index 3141f36c5..951ca4b71 100644
--- a/validator/impl/validator-set.hpp
+++ b/validator/impl/validator-set.hpp
@@ -32,6 +32,7 @@ namespace validator {
 
 class ValidatorSetQ : public ValidatorSet {
  public:
+  const ValidatorDescr* get_validator(const NodeIdShort& id) const override;
   bool is_validator(NodeIdShort id) const override;
   CatchainSeqno get_catchain_seqno() const override {
     return cc_seqno_;
@@ -62,8 +63,6 @@ class ValidatorSetQ : public ValidatorSet {
   ValidatorWeight total_weight_;
   std::vector<ValidatorDescr> ids_;
   std::vector<std::pair<NodeIdShort, size_t>> ids_map_;
-
-  const ValidatorDescr* find_validator(const NodeIdShort& id) const;
 };
 
 class ValidatorSetCompute {
diff --git a/validator/interfaces/validator-manager.h b/validator/interfaces/validator-manager.h
index 44ba04f11..3a568ba43 100644
--- a/validator/interfaces/validator-manager.h
+++ b/validator/interfaces/validator-manager.h
@@ -145,6 +145,7 @@ class ValidatorManager : public ValidatorManagerInterface {
   virtual void send_ihr_message(td::Ref<IhrMessage> message) = 0;
   virtual void send_top_shard_block_description(td::Ref<ShardTopBlockDescription> desc) = 0;
   virtual void send_block_broadcast(BlockBroadcast broadcast, int mode) = 0;
+  virtual void send_validator_telemetry(PublicKeyHash key, tl_object_ptr<ton_api::validator_telemetry> telemetry) = 0;
   virtual void send_download_archive_request(BlockSeqno mc_seqno, ShardIdFull shard_prefix, std::string tmp_dir,
                                              td::Timestamp timeout, td::Promise<std::string> promise) = 0;
 
diff --git a/validator/interfaces/validator-set.h b/validator/interfaces/validator-set.h
index b71c0bfea..ad7fb9b55 100644
--- a/validator/interfaces/validator-set.h
+++ b/validator/interfaces/validator-set.h
@@ -30,6 +30,7 @@ namespace validator {
 class ValidatorSet : public td::CntObject {
  public:
   virtual ~ValidatorSet() = default;
+  virtual const ValidatorDescr* get_validator(const NodeIdShort& id) const = 0;
   virtual bool is_validator(NodeIdShort id) const = 0;
   virtual CatchainSeqno get_catchain_seqno() const = 0;
   virtual td::uint32 get_validator_set_hash() const = 0;
diff --git a/validator/manager-disk.hpp b/validator/manager-disk.hpp
index ad7d86730..18649ba89 100644
--- a/validator/manager-disk.hpp
+++ b/validator/manager-disk.hpp
@@ -263,6 +263,8 @@ class ValidatorManagerImpl : public ValidatorManager {
   void send_top_shard_block_description(td::Ref<ShardTopBlockDescription> desc) override;
   void send_block_broadcast(BlockBroadcast broadcast, int mode) override {
   }
+  void send_validator_telemetry(PublicKeyHash key, tl_object_ptr<ton_api::validator_telemetry> telemetry) override {
+  }
   void send_download_archive_request(BlockSeqno mc_seqno, ShardIdFull shard_prefix, std::string tmp_dir,
                                      td::Timestamp timeout, td::Promise<std::string> promise) override {
     UNREACHABLE();
diff --git a/validator/manager-hardfork.hpp b/validator/manager-hardfork.hpp
index d5e91ae9f..7cd8c7057 100644
--- a/validator/manager-hardfork.hpp
+++ b/validator/manager-hardfork.hpp
@@ -333,6 +333,8 @@ class ValidatorManagerImpl : public ValidatorManager {
   }
   void send_block_broadcast(BlockBroadcast broadcast, int mode) override {
   }
+  void send_validator_telemetry(PublicKeyHash key, tl_object_ptr<ton_api::validator_telemetry> telemetry) override {
+  }
   void send_download_archive_request(BlockSeqno mc_seqno, ShardIdFull shard_prefix, std::string tmp_dir,
                                      td::Timestamp timeout, td::Promise<std::string> promise) override {
     UNREACHABLE();
diff --git a/validator/manager.cpp b/validator/manager.cpp
index 45b8144d3..a75de0a90 100644
--- a/validator/manager.cpp
+++ b/validator/manager.cpp
@@ -1647,6 +1647,11 @@ void ValidatorManagerImpl::send_block_broadcast(BlockBroadcast broadcast, int mo
   callback_->send_broadcast(std::move(broadcast), mode);
 }
 
+void ValidatorManagerImpl::send_validator_telemetry(PublicKeyHash key,
+                                                    tl_object_ptr<ton_api::validator_telemetry> telemetry) {
+  callback_->send_validator_telemetry(key, std::move(telemetry));
+}
+
 void ValidatorManagerImpl::send_download_archive_request(BlockSeqno mc_seqno, ShardIdFull shard_prefix,
                                                          std::string tmp_dir, td::Timestamp timeout,
                                                          td::Promise<std::string> promise) {
@@ -1765,6 +1770,7 @@ void ValidatorManagerImpl::started(ValidatorManagerInitResult R) {
   if (opts_->nonfinal_ls_queries_enabled()) {
     candidates_buffer_ = td::actor::create_actor<CandidatesBuffer>("candidates-buffer", actor_id(this));
   }
+  init_validator_telemetry();
 
   auto Q = td::PromiseCreator::lambda(
       [SelfId = actor_id(this)](td::Result<std::vector<td::Ref<PersistentStateDescription>>> R) {
@@ -1956,6 +1962,7 @@ void ValidatorManagerImpl::new_masterchain_block() {
       td::actor::send_closure(serializer_, &AsyncStateSerializer::update_last_known_key_block_ts,
                               last_key_block_handle_->unix_time());
     }
+    init_validator_telemetry();
   }
 
   update_shard_overlays();
@@ -3386,6 +3393,41 @@ void ValidatorManagerImpl::CheckedExtMsgCounter::before_query() {
   }
 }
 
+void ValidatorManagerImpl::init_validator_telemetry() {
+  if (last_masterchain_state_.is_null()) {
+    return;
+  }
+  td::Ref<ValidatorSet> validator_set = last_masterchain_state_->get_total_validator_set(0);
+  if (validator_set.is_null()) {
+    validator_telemetry_.clear();
+    return;
+  }
+  std::set<PublicKeyHash> processed;
+  for (auto& key : temp_keys_) {
+    if (const ValidatorDescr* desc = validator_set->get_validator(key.bits256_value())) {
+      processed.insert(key);
+      adnl::AdnlNodeIdShort adnl_id;
+      if (desc->addr.is_zero()) {
+        adnl_id = adnl::AdnlNodeIdShort{ValidatorFullId{desc->key}.compute_short_id()};
+      } else {
+        adnl_id = adnl::AdnlNodeIdShort{desc->addr};
+      }
+      auto& telemetry = validator_telemetry_[key];
+      if (telemetry.empty()) {
+        telemetry = td::actor::create_actor<ValidatorTelemetry>(
+            "telemetry", key, adnl_id, opts_->zero_block_id().file_hash, actor_id(this));
+      }
+    }
+  }
+  for (auto it = validator_telemetry_.begin(); it != validator_telemetry_.end();) {
+    if (processed.contains(it->first)) {
+      ++it;
+    } else {
+      it = validator_telemetry_.erase(it);
+    }
+  }
+}
+
 }  // namespace validator
 
 }  // namespace ton
diff --git a/validator/manager.hpp b/validator/manager.hpp
index a35ae52bd..d55e3442e 100644
--- a/validator/manager.hpp
+++ b/validator/manager.hpp
@@ -34,6 +34,7 @@
 #include "rldp/rldp.h"
 #include "token-manager.h"
 #include "queue-size-counter.hpp"
+#include "validator-telemetry.hpp"
 #include "impl/candidates-buffer.hpp"
 
 #include <map>
@@ -345,6 +346,7 @@ class ValidatorManagerImpl : public ValidatorManager {
   }
   void add_temp_key(PublicKeyHash key, td::Promise<td::Unit> promise) override {
     temp_keys_.insert(key);
+    init_validator_telemetry();
     promise.set_value(td::Unit());
   }
   void del_permanent_key(PublicKeyHash key, td::Promise<td::Unit> promise) override {
@@ -353,6 +355,7 @@ class ValidatorManagerImpl : public ValidatorManager {
   }
   void del_temp_key(PublicKeyHash key, td::Promise<td::Unit> promise) override {
     temp_keys_.erase(key);
+    init_validator_telemetry();
     promise.set_value(td::Unit());
   }
 
@@ -508,6 +511,7 @@ class ValidatorManagerImpl : public ValidatorManager {
   void send_ihr_message(td::Ref<IhrMessage> message) override;
   void send_top_shard_block_description(td::Ref<ShardTopBlockDescription> desc) override;
   void send_block_broadcast(BlockBroadcast broadcast, int mode) override;
+  void send_validator_telemetry(PublicKeyHash key, tl_object_ptr<ton_api::validator_telemetry> telemetry) override;
   void send_download_archive_request(BlockSeqno mc_seqno, ShardIdFull shard_prefix, std::string tmp_dir,
                                      td::Timestamp timeout, td::Promise<std::string> promise) override;
 
@@ -757,6 +761,10 @@ class ValidatorManagerImpl : public ValidatorManager {
   void record_validate_query_stats(BlockIdExt block_id, double work_time, double cpu_work_time) override;
   RecordedBlockStats &new_block_stats_record(BlockIdExt block_id);
 
+  std::map<PublicKeyHash, td::actor::ActorOwn<ValidatorTelemetry>> validator_telemetry_;
+
+  void init_validator_telemetry();
+
   std::map<BlockSeqno, td::Ref<PersistentStateDescription>> persistent_state_descriptions_;
   std::map<BlockIdExt, td::Ref<PersistentStateDescription>> persistent_state_blocks_;
 };
diff --git a/validator/validator-telemetry.cpp b/validator/validator-telemetry.cpp
new file mode 100644
index 000000000..403dd6f9f
--- /dev/null
+++ b/validator/validator-telemetry.cpp
@@ -0,0 +1,87 @@
+/*
+    This file is part of TON Blockchain source code.
+
+    TON Blockchain is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; either version 2
+    of the License, or (at your option) any later version.
+
+    TON Blockchain is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with TON Blockchain.  If not, see <http://www.gnu.org/licenses/>.
+
+    In addition, as a special exception, the copyright holders give permission
+    to link the code of portions of this program with the OpenSSL library.
+    You must obey the GNU General Public License in all respects for all
+    of the code used other than OpenSSL. If you modify file(s) with this
+    exception, you may extend this exception to your version of the file(s),
+    but you are not obligated to do so. If you do not wish to do so, delete this
+    exception statement from your version. If you delete this exception statement
+    from all source files in the program, then also delete it here.
+*/
+#include "validator-telemetry.hpp"
+#include "git.h"
+#include "td/utils/Random.h"
+#include "td/utils/port/uname.h"
+#include "interfaces/validator-manager.h"
+
+namespace ton::validator {
+
+void ValidatorTelemetry::start_up() {
+  node_version_ = PSTRING() << "validator-engine, Commit: " << GitMetadata::CommitSHA1()
+                            << ", Date: " << GitMetadata::CommitDate();
+
+  os_version_ = td::get_operating_system_version().str();
+
+  auto r_total_mem_stat = td::get_total_mem_stat();
+  if (r_total_mem_stat.is_error()) {
+    LOG(WARNING) << "Cannot get RAM size: " << r_total_mem_stat.move_as_error();
+  } else {
+    ram_size_ = r_total_mem_stat.ok().total_ram;
+  }
+
+  auto r_cpu_cores = td::get_cpu_cores();
+  if (r_cpu_cores.is_error()) {
+    LOG(WARNING) << "Cannot get CPU info: " << r_cpu_cores.move_as_error();
+  } else {
+    cpu_cores_ = r_cpu_cores.move_as_ok();
+  }
+
+  LOG(DEBUG) << "Initializing validator telemetry, key = " << key_ << ", adnl_id = " << local_id_;
+  alarm_timestamp().relax(send_telemetry_at_ = td::Timestamp::in(td::Random::fast(30.0, 60.0)));
+}
+
+void ValidatorTelemetry::alarm() {
+  if (send_telemetry_at_.is_in_past()) {
+    send_telemetry_at_ = td::Timestamp::never();
+    send_telemetry();
+  }
+  alarm_timestamp().relax(send_telemetry_at_);
+}
+
+void ValidatorTelemetry::send_telemetry() {
+  send_telemetry_at_ = td::Timestamp::in(PERIOD);
+
+  auto telemetry = create_tl_object<ton_api::validator_telemetry>();
+  telemetry->flags_ = 0;
+  telemetry->timestamp_ = td::Clocks::system();
+  telemetry->adnl_id_ = local_id_.bits256_value();
+  telemetry->node_version_ = node_version_;
+  telemetry->os_version_ = os_version_;
+  telemetry->node_started_at_ = adnl::Adnl::adnl_start_time();
+  telemetry->ram_size_ = ram_size_;
+  telemetry->cpu_cores_ = cpu_cores_;
+  telemetry->node_threads_ = (td::int32)td::actor::SchedulerContext::get()
+                                 ->scheduler_group()
+                                 ->schedulers.at(td::actor::SchedulerContext::get()->get_scheduler_id().value())
+                                 .cpu_threads_count;
+
+  LOG(DEBUG) << "Sending validator telemetry for adnl id " << local_id_;
+  td::actor::send_closure(manager_, &ValidatorManager::send_validator_telemetry, key_, std::move(telemetry));
+}
+
+}  // namespace ton::validator
diff --git a/validator/validator-telemetry.hpp b/validator/validator-telemetry.hpp
new file mode 100644
index 000000000..73908bdd1
--- /dev/null
+++ b/validator/validator-telemetry.hpp
@@ -0,0 +1,66 @@
+/*
+    This file is part of TON Blockchain source code.
+
+    TON Blockchain is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; either version 2
+    of the License, or (at your option) any later version.
+
+    TON Blockchain is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with TON Blockchain.  If not, see <http://www.gnu.org/licenses/>.
+
+    In addition, as a special exception, the copyright holders give permission
+    to link the code of portions of this program with the OpenSSL library.
+    You must obey the GNU General Public License in all respects for all
+    of the code used other than OpenSSL. If you modify file(s) with this
+    exception, you may extend this exception to your version of the file(s),
+    but you are not obligated to do so. If you do not wish to do so, delete this
+    exception statement from your version. If you delete this exception statement
+    from all source files in the program, then also delete it here.
+*/
+#pragma once
+#include "overlay.h"
+#include "td/actor/actor.h"
+#include "adnl/adnl.h"
+#include "interfaces/shard.h"
+
+namespace ton::validator {
+class ValidatorManager;
+
+class ValidatorTelemetry : public td::actor::Actor {
+public:
+  ValidatorTelemetry(PublicKeyHash key, adnl::AdnlNodeIdShort local_id, td::Bits256 zero_state_file_hash,
+                     td::actor::ActorId<ValidatorManager> manager)
+    : key_(key)
+    , local_id_(local_id)
+    , zero_state_file_hash_(zero_state_file_hash)
+    , manager_(std::move(manager)) {
+  }
+
+  void start_up() override;
+  void alarm() override;
+
+private:
+  PublicKeyHash key_;
+  adnl::AdnlNodeIdShort local_id_;
+  td::Bits256 zero_state_file_hash_;
+  td::actor::ActorId<ValidatorManager> manager_;
+
+  std::string node_version_;
+  std::string os_version_;
+  td::uint32 cpu_cores_ = 0;
+  td::uint64 ram_size_ = 0;
+
+  td::Timestamp send_telemetry_at_ = td::Timestamp::never();
+
+  void send_telemetry();
+
+  static constexpr double PERIOD = 600.0;
+  static constexpr td::uint32 MAX_SIZE = 8192;
+};
+} // namespace ton::validator
\ No newline at end of file
diff --git a/validator/validator.h b/validator/validator.h
index b66c72f9f..cc7cbe627 100644
--- a/validator/validator.h
+++ b/validator/validator.h
@@ -188,6 +188,7 @@ class ValidatorManagerInterface : public td::actor::Actor {
                                   td::Timestamp timeout, td::Promise<std::string> promise) = 0;
 
     virtual void new_key_block(BlockHandle handle) = 0;
+    virtual void send_validator_telemetry(PublicKeyHash key, tl_object_ptr<ton_api::validator_telemetry> telemetry) = 0;
   };
 
   virtual ~ValidatorManagerInterface() = default;