Download persistent states when syncing new shards

tl/generate/scheme/ton_api.tl

@@ -514,6 +514,9 @@ db.state.shardClient block:tonNode.blockIdExt = db.state.ShardClient;
 db.state.asyncSerializer block:tonNode.blockIdExt last:tonNode.blockIdExt last_ts:int = db.state.AsyncSerializer;
 db.state.hardforks blocks:(vector tonNode.blockIdExt) = db.state.Hardforks;
 db.state.dbVersion version:int = db.state.DbVersion;
+db.state.persistentStateDescriptionShards shard_blocks:(vector tonNode.blockIdExt) = db.state.PersistentStateDescriptionShards;
+db.state.persistentStateDescriptionHeader masterchain_id:tonNode.blockIdExt start_time:int end_time:int = db.state.PersistentStateDescriptionHeader;
+db.state.persistentStateDescriptionsList list:(vector db.state.persistentStateDescriptionHeader) = db.state.PersistentStateDescriptionsList;
 
 db.state.key.destroyedSessions = db.state.Key;
 db.state.key.initBlockId = db.state.Key;
@@ -522,6 +525,8 @@ db.state.key.shardClient = db.state.Key;
 db.state.key.asyncSerializer = db.state.Key;
 db.state.key.hardforks = db.state.Key;
 db.state.key.dbVersion = db.state.Key;
+db.state.key.persistentStateDescriptionShards masterchain_seqno:int = db.state.Key;
+db.state.key.persistentStateDescriptionsList = db.state.Key;
 
 db.lt.el.key workchain:int shard:long idx:int = db.lt.Key;
 db.lt.desc.key workchain:int shard:long = db.lt.Key;

ton/ton-types.h

@@ -484,4 +484,14 @@ struct ValidatorSessionConfig {
   static const td::uint32 BLOCK_HASH_COVERS_DATA_FROM_VERSION = 2;
 };
 
+struct PersistentStateDescription : public td::CntObject {
+  BlockIdExt masterchain_id;
+  std::vector<BlockIdExt> shard_blocks;
+  UnixTime start_time, end_time;
+
+  virtual CntObject* make_copy() const {
+    return new PersistentStateDescription(*this);
+  }
+};
+
 }  // namespace ton

validator/db/rootdb.cpp

@@ -497,6 +497,14 @@ void RootDb::set_async_mode(bool mode, td::Promise<td::Unit> promise) {
   td::actor::send_closure(archive_db_, &ArchiveManager::set_async_mode, mode, std::move(promise));
 }
 
+void RootDb::add_persistent_state_description(td::Ref<PersistentStateDescription> desc, td::Promise<td::Unit> promise) {
+  td::actor::send_closure(state_db_, &StateDb::add_persistent_state_description, std::move(desc), std::move(promise));
+}
+
+void RootDb::get_persistent_state_descriptions(td::Promise<std::vector<td::Ref<PersistentStateDescription>>> promise) {
+  td::actor::send_closure(state_db_, &StateDb::get_persistent_state_descriptions, std::move(promise));
+}
+
 void RootDb::run_gc(UnixTime ts, UnixTime archive_ttl) {
   td::actor::send_closure(archive_db_, &ArchiveManager::run_gc, ts, archive_ttl);
 }

validator/db/rootdb.hpp

@@ -132,6 +132,9 @@ class RootDb : public Db {
                          td::Promise<td::BufferSlice> promise) override;
   void set_async_mode(bool mode, td::Promise<td::Unit> promise) override;
 
+  void add_persistent_state_description(td::Ref<PersistentStateDescription> desc, td::Promise<td::Unit> promise) override;
+  void get_persistent_state_descriptions(td::Promise<std::vector<td::Ref<PersistentStateDescription>>> promise) override;
+
   void run_gc(UnixTime ts, UnixTime archive_ttl) override;
 
  private:

validator/db/statedb.cpp

@@ -240,6 +240,101 @@ void StateDb::start_up() {
   }
 }
 
+void StateDb::add_persistent_state_description(td::Ref<PersistentStateDescription> desc,
+                                               td::Promise<td::Unit> promise) {
+  std::string value;
+  auto list_key = create_hash_tl_object<ton_api::db_state_key_persistentStateDescriptionsList>();
+  auto R = kv_->get(list_key.as_slice(), value);
+  R.ensure();
+  tl_object_ptr<ton_api::db_state_persistentStateDescriptionsList> list;
+  if (R.ok() == td::KeyValue::GetStatus::Ok) {
+    auto F = fetch_tl_object<ton_api::db_state_persistentStateDescriptionsList>(value, true);
+    F.ensure();
+    list = F.move_as_ok();
+  } else {
+    list = create_tl_object<ton_api::db_state_persistentStateDescriptionsList>(
+        std::vector<tl_object_ptr<ton_api::db_state_persistentStateDescriptionHeader>>());
+  }
+  for (const auto& obj : list->list_) {
+    if ((BlockSeqno)obj->masterchain_id_->seqno_ == desc->masterchain_id.seqno()) {
+      promise.set_error(td::Status::Error("duplicate masterchain seqno"));
+      return;
+    }
+  }
+
+  auto now = (UnixTime)td::Clocks::system();
+  size_t new_size = 0;
+  kv_->begin_write_batch().ensure();
+  for (auto& obj : list->list_) {
+    auto end_time = (UnixTime)obj->end_time_;
+    if (end_time <= now) {
+      auto key =
+          create_hash_tl_object<ton_api::db_state_key_persistentStateDescriptionShards>(obj->masterchain_id_->seqno_);
+      kv_->erase(key.as_slice()).ensure();
+    } else {
+      list->list_[new_size++] = std::move(obj);
+    }
+  }
+  list->list_.resize(new_size);
+
+  std::vector<tl_object_ptr<ton_api::tonNode_blockIdExt>> shard_blocks;
+  for (const BlockIdExt& block_id : desc->shard_blocks) {
+    shard_blocks.push_back(create_tl_block_id(block_id));
+  }
+  auto key =
+      create_hash_tl_object<ton_api::db_state_key_persistentStateDescriptionShards>(desc->masterchain_id.seqno());
+  kv_->set(key.as_slice(),
+           create_serialize_tl_object<ton_api::db_state_persistentStateDescriptionShards>(std::move(shard_blocks))
+               .as_slice())
+      .ensure();
+
+  list->list_.push_back(create_tl_object<ton_api::db_state_persistentStateDescriptionHeader>(
+      create_tl_block_id(desc->masterchain_id), desc->start_time, desc->end_time));
+  kv_->set(list_key.as_slice(), serialize_tl_object(list, true).as_slice()).ensure();
+
+  kv_->commit_write_batch().ensure();
+
+  promise.set_result(td::Unit());
+}
+
+void StateDb::get_persistent_state_descriptions(td::Promise<std::vector<td::Ref<PersistentStateDescription>>> promise) {
+  std::string value;
+  auto R = kv_->get(create_hash_tl_object<ton_api::db_state_key_persistentStateDescriptionsList>().as_slice(), value);
+  R.ensure();
+  if (R.ok() == td::KeyValue::GetStatus::NotFound) {
+    promise.set_value({});
+    return;
+  }
+  auto F = fetch_tl_object<ton_api::db_state_persistentStateDescriptionsList>(value, true);
+  F.ensure();
+  std::vector<td::Ref<PersistentStateDescription>> result;
+  auto now = (UnixTime)td::Clocks::system();
+  for (const auto& obj : F.ok()->list_) {
+    auto end_time = (UnixTime)obj->end_time_;
+    if (end_time <= now) {
+      continue;
+    }
+    PersistentStateDescription desc;
+    desc.start_time = (UnixTime)obj->start_time_;
+    desc.end_time = end_time;
+    desc.masterchain_id = create_block_id(obj->masterchain_id_);
+    auto key =
+        create_hash_tl_object<ton_api::db_state_key_persistentStateDescriptionShards>(desc.masterchain_id.seqno());
+    auto R2 = kv_->get(key.as_slice(), value);
+    R2.ensure();
+    if (R2.ok() == td::KeyValue::GetStatus::NotFound) {
+      continue;
+    }
+    auto F2 = fetch_tl_object<ton_api::db_state_persistentStateDescriptionShards>(value, true);
+    F2.ensure();
+    for (const auto& block_id : F2.ok()->shard_blocks_) {
+      desc.shard_blocks.push_back(create_block_id(block_id));
+    }
+    result.push_back(td::Ref<PersistentStateDescription>(true, std::move(desc)));
+  }
+  promise.set_result(std::move(result));
+}
+
 void StateDb::truncate(BlockSeqno masterchain_seqno, ConstBlockHandle handle, td::Promise<td::Unit> promise) {
   {
     auto key = create_hash_tl_object<ton_api::db_state_key_asyncSerializer>();

validator/db/statedb.hpp

@@ -50,8 +50,8 @@ class StateDb : public td::actor::Actor {
   void update_hardforks(std::vector<BlockIdExt> blocks, td::Promise<td::Unit> promise);
   void get_hardforks(td::Promise<std::vector<BlockIdExt>> promise);
 
-  void update_db_version(td::uint32 version, td::Promise<td::Unit> promise);
-  void get_db_version(td::Promise<td::uint32> promise);
+  void add_persistent_state_description(td::Ref<PersistentStateDescription> desc, td::Promise<td::Unit> promise);
+  void get_persistent_state_descriptions(td::Promise<std::vector<td::Ref<PersistentStateDescription>>> promise);
 
   StateDb(td::actor::ActorId<RootDb> root_db, std::string path);
 

validator/downloaders/wait-block-state.cpp

@@ -21,6 +21,7 @@
 #include "ton/ton-io.hpp"
 #include "common/checksum.h"
 #include "common/delay.h"
+#include "validator/downloaders/download-state.hpp"
 
 namespace ton {
 
@@ -106,6 +107,19 @@ void WaitBlockState::start() {
     });
     td::actor::send_closure(manager_, &ValidatorManager::send_get_zero_state_request, handle_->id(), priority_,
                             std::move(P));
+  } else if (check_persistent_state_desc()) {
+    auto P = td::PromiseCreator::lambda([SelfId = actor_id(this)](td::Result<td::Ref<ShardState>> R) {
+      if (R.is_error()) {
+        LOG(WARNING) << "failed to get persistent state: " << R.move_as_error();
+        td::actor::send_closure(SelfId, &WaitBlockState::start);
+      } else {
+        td::actor::send_closure(SelfId, &WaitBlockState::written_state, R.move_as_ok());
+      }
+    });
+    BlockIdExt masterchain_id = persistent_state_desc_->masterchain_id;
+    td::actor::create_actor<DownloadShardState>("downloadstate", handle_->id(), masterchain_id, priority_, manager_,
+                                                timeout_, std::move(P))
+        .release();
   } else if (!handle_->inited_prev() || (!handle_->inited_proof() && !handle_->inited_proof_link())) {
     auto P = td::PromiseCreator::lambda([SelfId = actor_id(this), handle = handle_](td::Result<td::BufferSlice> R) {
       if (R.is_error()) {

validator/downloaders/wait-block-state.hpp

@@ -27,12 +27,14 @@ namespace validator {
 class WaitBlockState : public td::actor::Actor {
  public:
   WaitBlockState(BlockHandle handle, td::uint32 priority, td::actor::ActorId<ValidatorManager> manager,
-                 td::Timestamp timeout, td::Promise<td::Ref<ShardState>> promise)
+                 td::Timestamp timeout, td::Promise<td::Ref<ShardState>> promise,
+                 td::Ref<PersistentStateDescription> persistent_state_desc = {})
       : handle_(std::move(handle))
       , priority_(priority)
       , manager_(manager)
       , timeout_(timeout)
-      , promise_(std::move(promise)) {
+      , promise_(std::move(promise))
+      , persistent_state_desc_(std::move(persistent_state_desc)) {
   }
 
   void abort_query(td::Status reason);
@@ -73,6 +75,7 @@ class WaitBlockState : public td::actor::Actor {
   td::actor::ActorId<ValidatorManager> manager_;
   td::Timestamp timeout_;
   td::Promise<td::Ref<ShardState>> promise_;
+  td::Ref<PersistentStateDescription> persistent_state_desc_;
 
   td::Ref<ShardState> prev_state_;
   td::Ref<BlockData> block_;
@@ -81,6 +84,14 @@ class WaitBlockState : public td::actor::Actor {
   td::Timestamp next_static_file_attempt_;
 
   //td::PerfWarningTimer perf_timer_{"waitstate", 1.0};
+
+  bool check_persistent_state_desc() const {
+    if (persistent_state_desc_.is_null()) {
+      return false;
+    }
+    auto now = (UnixTime)td::Clocks::system();
+    return persistent_state_desc_->end_time > now + 3600 && persistent_state_desc_->start_time < now - 6 * 3600;
+  }
 };
 
 }  // namespace validator

validator/interfaces/db.h

@@ -119,6 +119,11 @@ class Db : public td::actor::Actor {
                                  td::Promise<td::BufferSlice> promise) = 0;
   virtual void set_async_mode(bool mode, td::Promise<td::Unit> promise) = 0;
 
+  virtual void add_persistent_state_description(td::Ref<PersistentStateDescription> desc,
+                                                td::Promise<td::Unit> promise) = 0;
+  virtual void get_persistent_state_descriptions(
+      td::Promise<std::vector<td::Ref<PersistentStateDescription>>> promise) = 0;
+
   virtual void run_gc(UnixTime ts, UnixTime archive_ttl) = 0;
 };
 

validator/interfaces/validator-manager.h

@@ -170,6 +170,8 @@ class ValidatorManager : public ValidatorManagerInterface {
 
   virtual void validated_new_block(BlockIdExt block_id) = 0;
 
+  virtual void add_persistent_state_description(td::Ref<PersistentStateDescription> desc) = 0;
+
   static bool is_persistent_state(UnixTime ts, UnixTime prev_ts) {
     return ts / (1 << 17) != prev_ts / (1 << 17);
   }

validator/manager-disk.hpp

@@ -377,6 +377,9 @@ class ValidatorManagerImpl : public ValidatorManager {
   }
   void validated_new_block(BlockIdExt block_id) override {
   }
+  void add_persistent_state_description(td::Ref<PersistentStateDescription> desc) override {
+  }
+
   void get_validator_sessions_info(
       td::Promise<tl_object_ptr<ton_api::engine_validator_validatorSessionsInfo>> promise) override {
     UNREACHABLE();

validator/manager-hardfork.hpp

@@ -437,6 +437,8 @@ class ValidatorManagerImpl : public ValidatorManager {
   }
   void validated_new_block(BlockIdExt block_id) override {
   }
+  void add_persistent_state_description(td::Ref<PersistentStateDescription> desc) override {
+  }
   void get_validator_sessions_info(
       td::Promise<tl_object_ptr<ton_api::engine_validator_validatorSessionsInfo>> promise) override {
     UNREACHABLE();

validator/manager.cpp

@@ -574,9 +574,10 @@ void ValidatorManagerImpl::wait_block_state(BlockHandle handle, td::uint32 prior
     auto P = td::PromiseCreator::lambda([SelfId = actor_id(this), handle](td::Result<td::Ref<ShardState>> R) {
       td::actor::send_closure(SelfId, &ValidatorManagerImpl::finished_wait_state, handle, std::move(R));
     });
-    auto id = td::actor::create_actor<WaitBlockState>("waitstate", handle, priority, actor_id(this),
-                                                      td::Timestamp::in(10.0), std::move(P))
-                  .release();
+    auto id =
+        td::actor::create_actor<WaitBlockState>("waitstate", handle, priority, actor_id(this), td::Timestamp::in(10.0),
+                                                std::move(P), get_block_persistent_state(handle->id()))
+            .release();
     wait_state_[handle->id()].actor_ = id;
     it = wait_state_.find(handle->id());
   }
@@ -1013,7 +1014,7 @@ void ValidatorManagerImpl::finished_wait_state(BlockHandle handle, td::Result<td
           td::actor::send_closure(SelfId, &ValidatorManagerImpl::finished_wait_state, handle, std::move(R));
         });
         auto id = td::actor::create_actor<WaitBlockState>("waitstate", handle, X.second, actor_id(this), X.first,
-                                                          std::move(P))
+                                                          std::move(P), get_block_persistent_state(handle->id()))
                       .release();
         it->second.actor_ = id;
         return;
@@ -1568,8 +1569,17 @@ void ValidatorManagerImpl::started(ValidatorManagerInitResult R) {
       td::actor::send_closure(SelfId, &ValidatorManagerImpl::read_gc_list, R.move_as_ok());
     }
   });
-
   td::actor::send_closure(db_, &Db::get_destroyed_validator_sessions, std::move(P));
+
+  auto Q = td::PromiseCreator::lambda(
+      [SelfId = actor_id(this)](td::Result<std::vector<td::Ref<PersistentStateDescription>>> R) {
+        if (R.is_error()) {
+          LOG(FATAL) << "db error: " << R.move_as_error();
+        } else {
+          td::actor::send_closure(SelfId, &ValidatorManagerImpl::got_persistent_state_descriptions, R.move_as_ok());
+        }
+      });
+  td::actor::send_closure(db_, &Db::get_persistent_state_descriptions, std::move(Q));
 }
 
 void ValidatorManagerImpl::read_gc_list(std::vector<ValidatorSessionId> list) {
@@ -2706,6 +2716,53 @@ void ValidatorManagerImpl::update_options(td::Ref<ValidatorManagerOptions> opts)
   opts_ = std::move(opts);
 }
 
+void ValidatorManagerImpl::add_persistent_state_description(td::Ref<PersistentStateDescription> desc) {
+  auto now = (UnixTime)td::Clocks::system();
+  if (desc->end_time <= now) {
+    return;
+  }
+  td::actor::send_closure(db_, &Db::add_persistent_state_description, desc, [](td::Result<td::Unit>) {});
+  auto it = persistent_state_descriptions_.begin();
+  while (it != persistent_state_descriptions_.end()) {
+    const auto &prev_desc = it->second;
+    if (prev_desc->end_time <= now) {
+      for (const BlockIdExt &block_id : prev_desc->shard_blocks) {
+        persistent_state_blocks_.erase(block_id);
+      }
+      it = persistent_state_descriptions_.erase(it);
+    } else {
+      ++it;
+    }
+  }
+  add_persistent_state_description_impl(std::move(desc));
+}
+
+void ValidatorManagerImpl::add_persistent_state_description_impl(td::Ref<PersistentStateDescription> desc) {
+  if (!persistent_state_descriptions_.emplace(desc->masterchain_id.seqno(), desc).second) {
+    return;
+  }
+  LOG(DEBUG) << "Add persistent state description for mc block " << desc->masterchain_id.to_str()
+             << " start_time=" << desc->start_time << " end_time=" << desc->end_time;
+  for (const BlockIdExt &block_id : desc->shard_blocks) {
+    persistent_state_blocks_[block_id] = desc;
+    LOG(DEBUG) << "Persistent state description: shard block " << block_id.to_str();
+  }
+}
+
+void ValidatorManagerImpl::got_persistent_state_descriptions(std::vector<td::Ref<PersistentStateDescription>> descs) {
+  for (auto &desc : descs) {
+    add_persistent_state_description_impl(std::move(desc));
+  }
+}
+
+td::Ref<PersistentStateDescription> ValidatorManagerImpl::get_block_persistent_state(BlockIdExt block_id) {
+  auto it = persistent_state_blocks_.find(block_id);
+  if (it == persistent_state_blocks_.end()) {
+    return {};
+  }
+  return it->second;
+}
+
 td::actor::ActorOwn<ValidatorManagerInterface> ValidatorManagerFactory::create(
     td::Ref<ValidatorManagerOptions> opts, std::string db_root, td::actor::ActorId<keyring::Keyring> keyring,
     td::actor::ActorId<adnl::Adnl> adnl, td::actor::ActorId<rldp::Rldp> rldp,

validator/manager.hpp

@@ -555,6 +555,8 @@ class ValidatorManagerImpl : public ValidatorManager {
     last = std::max(last, block_id.seqno());
   }
 
+  void add_persistent_state_description(td::Ref<PersistentStateDescription> desc) override;
+
   void add_collator(adnl::AdnlNodeIdShort id, ShardIdFull shard) override;
   void update_options(td::Ref<ValidatorManagerOptions> opts) override;
 
@@ -621,8 +623,11 @@ class ValidatorManagerImpl : public ValidatorManager {
   }
   void cleanup_last_validated_blocks(BlockId new_block);
 
- private:
+  void got_persistent_state_descriptions(std::vector<td::Ref<PersistentStateDescription>> descs);
+  void add_persistent_state_description_impl(td::Ref<PersistentStateDescription> desc);
+  td::Ref<PersistentStateDescription> get_block_persistent_state(BlockIdExt block_id);
 
+ private:
   std::map<BlockSeqno, WaitList<td::actor::Actor, td::Unit>> shard_client_waiters_;
 
   std::map<adnl::AdnlNodeIdShort, td::actor::ActorOwn<CollatorNode>> collator_nodes_;
@@ -630,6 +635,9 @@ class ValidatorManagerImpl : public ValidatorManager {
   std::set<ShardIdFull> shards_to_monitor_ = {ShardIdFull(masterchainId)};
   std::set<ShardIdFull> extra_active_shards_;
   std::map<ShardIdFull, BlockSeqno> last_validated_blocks_;
+
+  std::map<BlockSeqno, td::Ref<PersistentStateDescription>> persistent_state_descriptions_;
+  std::map<BlockIdExt, td::Ref<PersistentStateDescription>> persistent_state_blocks_;
 };
 
 }  // namespace validator

validator/shard-client.cpp

@@ -202,7 +202,7 @@ void ShardClient::apply_all_shards() {
         }
       });
       td::actor::send_closure(manager_, &ValidatorManager::wait_block_state_short, shard->top_block_id(),
-                              shard_client_priority(), td::Timestamp::in(600), std::move(Q));
+                              shard_client_priority(), td::Timestamp::in(1500), std::move(Q));
     }
   }
 }
@@ -255,11 +255,9 @@ void ShardClient::build_shard_overlays() {
     auto shard = info->shard();
     workchains.insert(shard.workchain);
     bool will_split = shard.pfx_len() < max_shard_pfx_len &&
-                      ((info->fsm_state() == McShardHash::FsmState::fsm_split && info->fsm_utime() < cur_time + 60) ||
-                       info->before_split());
-    bool will_merge = shard.pfx_len() > 0 &&
-                      ((info->fsm_state() == McShardHash::FsmState::fsm_merge && info->fsm_utime() < cur_time + 60) ||
-                       info->before_merge());
+                      (info->fsm_state() == McShardHash::FsmState::fsm_split || info->before_split());
+    bool will_merge =
+        shard.pfx_len() > 0 && (info->fsm_state() == McShardHash::FsmState::fsm_merge || info->before_merge());
     if (opts_->need_monitor(shard) || (will_merge && opts_->need_monitor(shard_parent(shard)))) {
       new_shards_to_monitor.insert(shard);
     }

validator/state-serializer.cpp

@@ -18,7 +18,6 @@
 */
 #include "state-serializer.hpp"
 #include "td/utils/Random.h"
-#include "adnl/utils.hpp"
 #include "ton/ton-io.hpp"
 #include "common/delay.h"
 
@@ -122,6 +121,21 @@ void AsyncStateSerializer::next_iteration() {
   CHECK(masterchain_handle_->id() == last_block_id_);
   if (attempt_ < max_attempt() && last_key_block_id_.id.seqno < last_block_id_.id.seqno &&
       need_serialize(masterchain_handle_)) {
+    if (!stored_persistent_state_description_) {
+      LOG(INFO) << "storing persistent state description for " << masterchain_handle_->id().id;
+      running_ = true;
+      auto P = td::PromiseCreator::lambda([SelfId = actor_id(this)](td::Result<td::Ref<ShardState>> R) {
+        if (R.is_error()) {
+          td::actor::send_closure(SelfId, &AsyncStateSerializer::fail_handler,
+                                  R.move_as_error_prefix("failed to get masterchain state: "));
+        } else {
+          td::actor::send_closure(SelfId, &AsyncStateSerializer::store_persistent_state_description,
+                                  td::Ref<MasterchainState>(R.move_as_ok()));
+        }
+      });
+      td::actor::send_closure(manager_, &ValidatorManager::get_shard_state_from_db, masterchain_handle_, std::move(P));
+      return;
+    }
     if (!cell_db_reader_) {
       running_ = true;
       auto P = td::PromiseCreator::lambda([SelfId = actor_id(this)](td::Result<std::shared_ptr<vm::CellDbReader>> R) {
@@ -175,6 +189,7 @@ void AsyncStateSerializer::next_iteration() {
   if (masterchain_handle_->inited_next_left()) {
     last_block_id_ = masterchain_handle_->one_next(true);
     have_masterchain_state_ = false;
+    stored_persistent_state_description_ = false;
     masterchain_handle_ = nullptr;
     saved_to_db_ = false;
     shards_.clear();
@@ -189,6 +204,24 @@ void AsyncStateSerializer::got_top_masterchain_handle(BlockIdExt block_id) {
   }
 }
 
+void AsyncStateSerializer::store_persistent_state_description(td::Ref<MasterchainState> state) {
+  stored_persistent_state_description_ = true;
+  attempt_ = 0;
+  running_ = false;
+
+  PersistentStateDescription desc;
+  desc.masterchain_id = state->get_block_id();
+  desc.start_time = state->get_unix_time();
+  desc.end_time = ValidatorManager::persistent_state_ttl(desc.start_time);
+  for (const auto &v : state->get_shards()) {
+    desc.shard_blocks.push_back(v->top_block_id());
+  }
+  td::actor::send_closure(manager_, &ValidatorManager::add_persistent_state_description,
+                          td::Ref<PersistentStateDescription>(true, std::move(desc)));
+
+  next_iteration();
+}
+
 void AsyncStateSerializer::got_cell_db_reader(std::shared_ptr<vm::CellDbReader> cell_db_reader) {
   cell_db_reader_ = std::move(cell_db_reader);
   running_ = false;

validator/state-serializer.hpp

@@ -44,6 +44,7 @@ class AsyncStateSerializer : public td::actor::Actor {
 
   std::shared_ptr<vm::CellDbReader> cell_db_reader_ = nullptr;
   BlockHandle masterchain_handle_;
+  bool stored_persistent_state_description_ = false;
   bool have_masterchain_state_ = false;
 
   std::vector<BlockIdExt> shards_;
@@ -71,6 +72,7 @@ class AsyncStateSerializer : public td::actor::Actor {
 
   void next_iteration();
   void got_top_masterchain_handle(BlockIdExt block_id);
+  void store_persistent_state_description(td::Ref<MasterchainState> state);
   void got_cell_db_reader(std::shared_ptr<vm::CellDbReader> cell_db_reader);
   void got_masterchain_handle(BlockHandle handle_);
   void got_masterchain_state(td::Ref<MasterchainState> state);