diff --git a/validator/full-node-shard.cpp b/validator/full-node-shard.cpp
index c351653f4..7d33a1950 100644
--- a/validator/full-node-shard.cpp
+++ b/validator/full-node-shard.cpp
@@ -673,7 +673,7 @@ void FullNodeShardImpl::process_query(adnl::AdnlNodeIdShort src, ton_api::tonNod
 void FullNodeShardImpl::process_query(adnl::AdnlNodeIdShort src, ton_api::tonNode_getOutMsgQueueProof &query,
                                       td::Promise<td::BufferSlice> promise) {
   std::vector<BlockIdExt> blocks;
-  for (const auto& x : query.blocks_) {
+  for (const auto &x : query.blocks_) {
     BlockIdExt id = create_block_id(x);
     if (!id.is_valid_ext()) {
       promise.set_error(td::Status::Error("invalid block_id"));
@@ -691,18 +691,14 @@ void FullNodeShardImpl::process_query(adnl::AdnlNodeIdShort src, ton_api::tonNod
     return;
   }
   block::ImportedMsgQueueLimits limits{(td::uint32)query.limits_->max_bytes_, (td::uint32)query.limits_->max_msgs_};
-  if (limits.max_bytes > (1 << 24)) {
+  if (limits.max_msgs > 512) {
+    promise.set_error(td::Status::Error("max_msgs is too big"));
+    return;
+  }
+  if (limits.max_bytes > (1 << 21)) {
     promise.set_error(td::Status::Error("max_bytes is too big"));
     return;
   }
-  auto P = td::PromiseCreator::lambda(
-      [promise = std::move(promise)](td::Result<tl_object_ptr<ton_api::tonNode_outMsgQueueProof>> R) mutable {
-        if (R.is_error()) {
-          promise.set_result(create_serialize_tl_object<ton_api::tonNode_outMsgQueueProofEmpty>());
-        } else {
-          promise.set_result(serialize_tl_object(R.move_as_ok(), true));
-        }
-      });
   FLOG(DEBUG) {
     sb << "Got query getOutMsgQueueProof to shard " << dst_shard.to_str() << " from blocks";
     for (const BlockIdExt &id : blocks) {
@@ -710,9 +706,24 @@ void FullNodeShardImpl::process_query(adnl::AdnlNodeIdShort src, ton_api::tonNod
     }
     sb << " from " << src;
   };
-  td::actor::create_actor<BuildOutMsgQueueProof>("buildqueueproof", dst_shard, std::move(blocks), limits,
-                                                 validator_manager_, std::move(P))
-      .release();
+  td::actor::send_closure(
+      full_node_, &FullNode::get_out_msg_queue_query_token,
+      [=, manager = validator_manager_, blocks = std::move(blocks),
+       promise = std::move(promise)](td::Result<std::unique_ptr<ActionToken>> R) mutable {
+        TRY_RESULT_PROMISE(promise, token, std::move(R));
+        auto P =
+            td::PromiseCreator::lambda([promise = std::move(promise), token = std::move(token)](
+                                           td::Result<tl_object_ptr<ton_api::tonNode_outMsgQueueProof>> R) mutable {
+              if (R.is_error()) {
+                promise.set_result(create_serialize_tl_object<ton_api::tonNode_outMsgQueueProofEmpty>());
+              } else {
+                promise.set_result(serialize_tl_object(R.move_as_ok(), true));
+              }
+            });
+        td::actor::create_actor<BuildOutMsgQueueProof>("buildqueueproof", dst_shard, std::move(blocks), limits, manager,
+                                                       std::move(P))
+            .release();
+      });
 }
 
 void FullNodeShardImpl::receive_query(adnl::AdnlNodeIdShort src, td::BufferSlice query,
diff --git a/validator/full-node.cpp b/validator/full-node.cpp
index bb0377ff9..658cb34e3 100644
--- a/validator/full-node.cpp
+++ b/validator/full-node.cpp
@@ -21,6 +21,7 @@
 #include "td/actor/MultiPromise.h"
 #include "full-node.h"
 #include "common/delay.h"
+#include "impl/out-msg-queue-proof.hpp"
 #include "td/utils/Random.h"
 #include "ton/ton-tl.hpp"
 
@@ -575,6 +576,11 @@ void FullNodeImpl::process_block_candidate_broadcast(BlockIdExt block_id, Catcha
                           std::move(data));
 }
 
+void FullNodeImpl::get_out_msg_queue_query_token(td::Promise<std::unique_ptr<ActionToken>> promise) {
+  td::actor::send_closure(out_msg_queue_query_token_manager_, &TokenManager::get_token, 1, 0, td::Timestamp::in(10.0),
+                          std::move(promise));
+}
+
 void FullNodeImpl::set_validator_telemetry_filename(std::string value) {
   validator_telemetry_filename_ = std::move(value);
   update_validator_telemetry_collector();
diff --git a/validator/full-node.h b/validator/full-node.h
index 73ecbd720..fdb1bf3b0 100644
--- a/validator/full-node.h
+++ b/validator/full-node.h
@@ -91,6 +91,7 @@ class FullNode : public td::actor::Actor {
   virtual void process_block_broadcast(BlockBroadcast broadcast) = 0;
   virtual void process_block_candidate_broadcast(BlockIdExt block_id, CatchainSeqno cc_seqno,
                                                  td::uint32 validator_set_hash, td::BufferSlice data) = 0;
+  virtual void get_out_msg_queue_query_token(td::Promise<std::unique_ptr<ActionToken>> promise) = 0;
 
   virtual void set_validator_telemetry_filename(std::string value) = 0;
 
diff --git a/validator/full-node.hpp b/validator/full-node.hpp
index 00a125c7d..0ea6fa0b3 100644
--- a/validator/full-node.hpp
+++ b/validator/full-node.hpp
@@ -28,6 +28,7 @@
 #include <map>
 #include <set>
 #include <queue>
+#include <token-manager.h>
 
 namespace ton {
 
@@ -90,6 +91,7 @@ class FullNodeImpl : public FullNode {
   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 get_out_msg_queue_query_token(td::Promise<std::unique_ptr<ActionToken>> promise) override;
 
   void set_validator_telemetry_filename(std::string value) override;
 
@@ -163,6 +165,9 @@ class FullNodeImpl : public FullNode {
   PublicKeyHash validator_telemetry_collector_key_ = PublicKeyHash::zero();
 
   void update_validator_telemetry_collector();
+
+  td::actor::ActorOwn<TokenManager> out_msg_queue_query_token_manager_ =
+      td::actor::create_actor<TokenManager>("tokens", /* max_tokens = */ 1);
 };
 
 }  // namespace fullnode
diff --git a/validator/manager-disk.hpp b/validator/manager-disk.hpp
index 76a95aa71..cd06bf555 100644
--- a/validator/manager-disk.hpp
+++ b/validator/manager-disk.hpp
@@ -288,7 +288,7 @@ class ValidatorManagerImpl : public ValidatorManager {
   void try_get_static_file(FileHash file_hash, td::Promise<td::BufferSlice> promise) override;
 
   void get_download_token(size_t download_size, td::uint32 priority, td::Timestamp timeout,
-                          td::Promise<std::unique_ptr<DownloadToken>> promise) override {
+                          td::Promise<std::unique_ptr<ActionToken>> promise) override {
     promise.set_error(td::Status::Error(ErrorCode::error, "download disabled"));
   }
 
diff --git a/validator/manager-hardfork.hpp b/validator/manager-hardfork.hpp
index f55b4bc0c..0b8b9e736 100644
--- a/validator/manager-hardfork.hpp
+++ b/validator/manager-hardfork.hpp
@@ -362,7 +362,7 @@ class ValidatorManagerImpl : public ValidatorManager {
   void try_get_static_file(FileHash file_hash, td::Promise<td::BufferSlice> promise) override;
 
   void get_download_token(size_t download_size, td::uint32 priority, td::Timestamp timeout,
-                          td::Promise<std::unique_ptr<DownloadToken>> promise) override {
+                          td::Promise<std::unique_ptr<ActionToken>> promise) override {
     promise.set_error(td::Status::Error(ErrorCode::error, "download disabled"));
   }
 
diff --git a/validator/manager.hpp b/validator/manager.hpp
index 26235853c..519cab12a 100644
--- a/validator/manager.hpp
+++ b/validator/manager.hpp
@@ -527,8 +527,8 @@ class ValidatorManagerImpl : public ValidatorManager {
   void try_get_static_file(FileHash file_hash, td::Promise<td::BufferSlice> promise) override;
 
   void get_download_token(size_t download_size, td::uint32 priority, td::Timestamp timeout,
-                          td::Promise<std::unique_ptr<DownloadToken>> promise) override {
-    td::actor::send_closure(token_manager_, &TokenManager::get_download_token, download_size, priority, timeout,
+                          td::Promise<std::unique_ptr<ActionToken>> promise) override {
+    td::actor::send_closure(token_manager_, &TokenManager::get_token, download_size, priority, timeout,
                             std::move(promise));
   }
 
diff --git a/validator/net/download-block-new.cpp b/validator/net/download-block-new.cpp
index e9a193b46..37580cef1 100644
--- a/validator/net/download-block-new.cpp
+++ b/validator/net/download-block-new.cpp
@@ -144,7 +144,7 @@ void DownloadBlockNew::got_block_handle(BlockHandle handle) {
     return;
   }
 
-  auto P = td::PromiseCreator::lambda([SelfId = actor_id(this)](td::Result<std::unique_ptr<DownloadToken>> R) {
+  auto P = td::PromiseCreator::lambda([SelfId = actor_id(this)](td::Result<std::unique_ptr<ActionToken>> R) {
     if (R.is_error()) {
       td::actor::send_closure(SelfId, &DownloadBlockNew::abort_query,
                               R.move_as_error_prefix("failed to get download token: "));
@@ -156,7 +156,7 @@ void DownloadBlockNew::got_block_handle(BlockHandle handle) {
                           std::move(P));
 }
 
-void DownloadBlockNew::got_download_token(std::unique_ptr<DownloadToken> token) {
+void DownloadBlockNew::got_download_token(std::unique_ptr<ActionToken> token) {
   token_ = std::move(token);
 
   if (download_from_.is_zero() && client_.empty()) {
diff --git a/validator/net/download-block-new.hpp b/validator/net/download-block-new.hpp
index d2a0e1363..ecd062ee3 100644
--- a/validator/net/download-block-new.hpp
+++ b/validator/net/download-block-new.hpp
@@ -49,7 +49,7 @@ class DownloadBlockNew : public td::actor::Actor {
 
   void start_up() override;
   void got_block_handle(BlockHandle handle);
-  void got_download_token(std::unique_ptr<DownloadToken> token);
+  void got_download_token(std::unique_ptr<ActionToken> token);
   void got_node_to_download(adnl::AdnlNodeIdShort node);
   void got_data(td::BufferSlice data);
   void got_data_from_db(td::BufferSlice data);
@@ -79,7 +79,7 @@ class DownloadBlockNew : public td::actor::Actor {
 
   bool allow_partial_proof_ = false;
 
-  std::unique_ptr<DownloadToken> token_;
+  std::unique_ptr<ActionToken> token_;
 };
 
 }  // namespace fullnode
diff --git a/validator/net/download-block.cpp b/validator/net/download-block.cpp
index 9ca84be29..c60955ed2 100644
--- a/validator/net/download-block.cpp
+++ b/validator/net/download-block.cpp
@@ -128,7 +128,7 @@ void DownloadBlock::got_block_handle(BlockHandle handle) {
     return;
   }
 
-  auto P = td::PromiseCreator::lambda([SelfId = actor_id(this)](td::Result<std::unique_ptr<DownloadToken>> R) {
+  auto P = td::PromiseCreator::lambda([SelfId = actor_id(this)](td::Result<std::unique_ptr<ActionToken>> R) {
     if (R.is_error()) {
       td::actor::send_closure(SelfId, &DownloadBlock::abort_query,
                               R.move_as_error_prefix("failed to get download token: "));
@@ -140,7 +140,7 @@ void DownloadBlock::got_block_handle(BlockHandle handle) {
                           std::move(P));
 }
 
-void DownloadBlock::got_download_token(std::unique_ptr<DownloadToken> token) {
+void DownloadBlock::got_download_token(std::unique_ptr<ActionToken> token) {
   token_ = std::move(token);
 
   if (download_from_.is_zero() && !short_ && client_.empty()) {
diff --git a/validator/net/download-block.hpp b/validator/net/download-block.hpp
index b1847d586..2e2a715bf 100644
--- a/validator/net/download-block.hpp
+++ b/validator/net/download-block.hpp
@@ -49,7 +49,7 @@ class DownloadBlock : public td::actor::Actor {
 
   void start_up() override;
   void got_block_handle(BlockHandle handle);
-  void got_download_token(std::unique_ptr<DownloadToken> token);
+  void got_download_token(std::unique_ptr<ActionToken> token);
   void got_node_to_download(adnl::AdnlNodeIdShort node);
   void got_block_proof_description(td::BufferSlice proof_description);
   void got_block_proof(td::BufferSlice data);
@@ -86,7 +86,7 @@ class DownloadBlock : public td::actor::Actor {
 
   bool allow_partial_proof_ = false;
 
-  std::unique_ptr<DownloadToken> token_;
+  std::unique_ptr<ActionToken> token_;
 };
 
 }  // namespace fullnode
diff --git a/validator/net/download-proof.cpp b/validator/net/download-proof.cpp
index 2ff95b885..784ecac20 100644
--- a/validator/net/download-proof.cpp
+++ b/validator/net/download-proof.cpp
@@ -107,7 +107,7 @@ void DownloadProof::start_up() {
 }
 
 void DownloadProof::checked_db() {
-  auto P = td::PromiseCreator::lambda([SelfId = actor_id(this)](td::Result<std::unique_ptr<DownloadToken>> R) {
+  auto P = td::PromiseCreator::lambda([SelfId = actor_id(this)](td::Result<std::unique_ptr<ActionToken>> R) {
     if (R.is_error()) {
       td::actor::send_closure(SelfId, &DownloadProof::abort_query,
                               R.move_as_error_prefix("failed to get download token: "));
@@ -119,7 +119,7 @@ void DownloadProof::checked_db() {
                           std::move(P));
 }
 
-void DownloadProof::got_download_token(std::unique_ptr<DownloadToken> token) {
+void DownloadProof::got_download_token(std::unique_ptr<ActionToken> token) {
   token_ = std::move(token);
 
   if (download_from_.is_zero() && client_.empty()) {
diff --git a/validator/net/download-proof.hpp b/validator/net/download-proof.hpp
index 0739dcaf1..9caf9c3a1 100644
--- a/validator/net/download-proof.hpp
+++ b/validator/net/download-proof.hpp
@@ -45,7 +45,7 @@ class DownloadProof : public td::actor::Actor {
 
   void start_up() override;
   void checked_db();
-  void got_download_token(std::unique_ptr<DownloadToken> token);
+  void got_download_token(std::unique_ptr<ActionToken> token);
   void got_node_to_download(adnl::AdnlNodeIdShort node);
   void got_block_proof_description(td::BufferSlice proof_description);
   void got_block_proof(td::BufferSlice data);
@@ -72,7 +72,7 @@ class DownloadProof : public td::actor::Actor {
 
   td::BufferSlice data_;
 
-  std::unique_ptr<DownloadToken> token_;
+  std::unique_ptr<ActionToken> token_;
 };
 
 }  // namespace fullnode
diff --git a/validator/net/get-next-key-blocks.cpp b/validator/net/get-next-key-blocks.cpp
index 3354b0057..2c12e495b 100644
--- a/validator/net/get-next-key-blocks.cpp
+++ b/validator/net/get-next-key-blocks.cpp
@@ -84,7 +84,7 @@ void GetNextKeyBlocks::finish_query() {
 void GetNextKeyBlocks::start_up() {
   alarm_timestamp() = timeout_;
 
-  auto P = td::PromiseCreator::lambda([SelfId = actor_id(this)](td::Result<std::unique_ptr<DownloadToken>> R) {
+  auto P = td::PromiseCreator::lambda([SelfId = actor_id(this)](td::Result<std::unique_ptr<ActionToken>> R) {
     if (R.is_error()) {
       td::actor::send_closure(SelfId, &GetNextKeyBlocks::abort_query,
                               R.move_as_error_prefix("failed to get download token: "));
@@ -96,7 +96,7 @@ void GetNextKeyBlocks::start_up() {
                           std::move(P));
 }
 
-void GetNextKeyBlocks::got_download_token(std::unique_ptr<DownloadToken> token) {
+void GetNextKeyBlocks::got_download_token(std::unique_ptr<ActionToken> token) {
   token_ = std::move(token);
 
   if (download_from_.is_zero() && client_.empty()) {
diff --git a/validator/net/get-next-key-blocks.hpp b/validator/net/get-next-key-blocks.hpp
index 074289e21..14c040bd2 100644
--- a/validator/net/get-next-key-blocks.hpp
+++ b/validator/net/get-next-key-blocks.hpp
@@ -44,7 +44,7 @@ class GetNextKeyBlocks : public td::actor::Actor {
   void finish_query();
 
   void start_up() override;
-  void got_download_token(std::unique_ptr<DownloadToken> token);
+  void got_download_token(std::unique_ptr<ActionToken> token);
   void got_node_to_download(adnl::AdnlNodeIdShort node);
   void send_request();
   void got_result(td::BufferSlice res);
@@ -75,7 +75,7 @@ class GetNextKeyBlocks : public td::actor::Actor {
   std::vector<BlockIdExt> pending_;
   std::vector<BlockIdExt> res_;
 
-  std::unique_ptr<DownloadToken> token_;
+  std::unique_ptr<ActionToken> token_;
 };
 
 }  // namespace fullnode
diff --git a/validator/token-manager.cpp b/validator/token-manager.cpp
index 0bc4a9c60..8242f9219 100644
--- a/validator/token-manager.cpp
+++ b/validator/token-manager.cpp
@@ -22,23 +22,23 @@ namespace ton {
 
 namespace validator {
 
-void TokenManager::get_download_token(size_t download_size, td::uint32 priority, td::Timestamp timeout,
-                                      td::Promise<std::unique_ptr<DownloadToken>> promise) {
+void TokenManager::get_token(size_t size, td::uint32 priority, td::Timestamp timeout,
+                             td::Promise<std::unique_ptr<ActionToken>> promise) {
   if (free_priority_tokens_ > 0 && priority > 0) {
     --free_priority_tokens_;
-    promise.set_value(gen_token(download_size, priority));
+    promise.set_value(gen_token(size, priority));
     return;
   }
   if (free_tokens_ > 0) {
     --free_tokens_;
-    promise.set_value(gen_token(download_size, priority));
+    promise.set_value(gen_token(size, priority));
     return;
   }
 
-  pending_.emplace(PendingPromiseKey{download_size, priority, seqno_++}, PendingPromise{timeout, std::move(promise)});
+  pending_.emplace(PendingPromiseKey{size, priority, seqno_++}, PendingPromise{timeout, std::move(promise)});
 }
 
-void TokenManager::download_token_cleared(size_t download_size, td::uint32 priority) {
+void TokenManager::token_cleared(size_t size, td::uint32 priority) {
   (priority ? free_priority_tokens_ : free_tokens_)++;
   if (free_priority_tokens_ > max_priority_tokens_) {
     free_priority_tokens_--;
@@ -47,7 +47,7 @@ void TokenManager::download_token_cleared(size_t download_size, td::uint32 prior
 
   for (auto it = pending_.begin(); it != pending_.end();) {
     if (it->first.priority && (free_tokens_ || free_priority_tokens_)) {
-      it->second.promise.set_value(gen_token(download_size, priority));
+      it->second.promise.set_value(gen_token(size, priority));
       auto it2 = it++;
       pending_.erase(it2);
       if (free_priority_tokens_ > 0) {
@@ -56,7 +56,7 @@ void TokenManager::download_token_cleared(size_t download_size, td::uint32 prior
         free_tokens_--;
       }
     } else if (!it->first.priority && free_tokens_) {
-      it->second.promise.set_value(gen_token(download_size, priority));
+      it->second.promise.set_value(gen_token(size, priority));
       auto it2 = it++;
       pending_.erase(it2);
       free_tokens_--;
@@ -69,7 +69,7 @@ void TokenManager::download_token_cleared(size_t download_size, td::uint32 prior
 void TokenManager::alarm() {
   for (auto it = pending_.begin(); it != pending_.end();) {
     if (it->second.timeout.is_in_past()) {
-      it->second.promise.set_error(td::Status::Error(ErrorCode::timeout, "timeout in wait download token"));
+      it->second.promise.set_error(td::Status::Error(ErrorCode::timeout, "timeout in wait token"));
       it = pending_.erase(it);
     } else {
       it++;
@@ -77,23 +77,23 @@ void TokenManager::alarm() {
   }
 }
 
-std::unique_ptr<DownloadToken> TokenManager::gen_token(size_t download_size, td::uint32 priority) {
-  class Token : public DownloadToken {
+std::unique_ptr<ActionToken> TokenManager::gen_token(size_t size, td::uint32 priority) {
+  class TokenImpl : public ActionToken {
    public:
-    Token(size_t download_size, td::uint32 priority, td::actor::ActorId<TokenManager> manager)
-        : download_size_(download_size), priority_(priority), manager_(manager) {
+    TokenImpl(size_t size, td::uint32 priority, td::actor::ActorId<TokenManager> manager)
+        : size_(size), priority_(priority), manager_(manager) {
     }
-    ~Token() override {
-      td::actor::send_closure(manager_, &TokenManager::download_token_cleared, download_size_, priority_);
+    ~TokenImpl() override {
+      td::actor::send_closure(manager_, &TokenManager::token_cleared, size_, priority_);
     }
 
    private:
-    size_t download_size_;
+    size_t size_;
     td::uint32 priority_;
     td::actor::ActorId<TokenManager> manager_;
   };
 
-  return std::make_unique<Token>(download_size, priority, actor_id(this));
+  return std::make_unique<TokenImpl>(size, priority, actor_id(this));
 }
 
 }  // namespace validator
diff --git a/validator/token-manager.h b/validator/token-manager.h
index 0d75710f9..0fd0126a3 100644
--- a/validator/token-manager.h
+++ b/validator/token-manager.h
@@ -31,16 +31,19 @@ class TokenManager : public td::actor::Actor {
  public:
   TokenManager() {
   }
+  explicit TokenManager(td::uint32 max_tokens)
+      : free_tokens_(max_tokens), free_priority_tokens_(max_tokens), max_priority_tokens_(max_tokens) {
+  }
   void alarm() override;
 
-  void get_download_token(size_t download_size, td::uint32 priority, td::Timestamp timeout,
-                          td::Promise<std::unique_ptr<DownloadToken>> promise);
-  void download_token_cleared(size_t download_size, td::uint32 priority);
+  void get_token(size_t size, td::uint32 priority, td::Timestamp timeout,
+                 td::Promise<std::unique_ptr<ActionToken>> promise);
+  void token_cleared(size_t size, td::uint32 priority);
 
  private:
-  std::unique_ptr<DownloadToken> gen_token(size_t download_size, td::uint32 priority);
+  std::unique_ptr<ActionToken> gen_token(size_t size, td::uint32 priority);
   struct PendingPromiseKey {
-    size_t download_size;
+    size_t size;
     td::uint32 priority;
     td::uint64 seqno;
 
@@ -50,7 +53,7 @@ class TokenManager : public td::actor::Actor {
   };
   struct PendingPromise {
     td::Timestamp timeout;
-    td::Promise<std::unique_ptr<DownloadToken>> promise;
+    td::Promise<std::unique_ptr<ActionToken>> promise;
   };
   td::uint64 seqno_ = 0;
   std::map<PendingPromiseKey, PendingPromise> pending_;
diff --git a/validator/validator.h b/validator/validator.h
index e6aff97cc..73065aa98 100644
--- a/validator/validator.h
+++ b/validator/validator.h
@@ -42,9 +42,9 @@ namespace ton {
 
 namespace validator {
 
-class DownloadToken {
+class ActionToken {
  public:
-  virtual ~DownloadToken() = default;
+  virtual ~ActionToken() = default;
 };
 
 struct PerfTimerStats {
@@ -252,7 +252,7 @@ class ValidatorManagerInterface : public td::actor::Actor {
   virtual void add_ext_server_port(td::uint16 port) = 0;
 
   virtual void get_download_token(size_t download_size, td::uint32 priority, td::Timestamp timeout,
-                                  td::Promise<std::unique_ptr<DownloadToken>> promise) = 0;
+                                  td::Promise<std::unique_ptr<ActionToken>> promise) = 0;
 
   virtual void get_block_data_from_db(ConstBlockHandle handle, td::Promise<td::Ref<BlockData>> promise) = 0;
   virtual void get_block_data_from_db_short(BlockIdExt block_id, td::Promise<td::Ref<BlockData>> promise) = 0;