diff --git a/crypto/fift/SourceLookup.h b/crypto/fift/SourceLookup.h
index 33ee71d4..7d51396c 100644
--- a/crypto/fift/SourceLookup.h
+++ b/crypto/fift/SourceLookup.h
@@ -79,7 +79,7 @@ class SourceLookup {
     if (os_time_) {
       return os_time_->now();
     }
-    return static_cast<td::uint32>(td::Time::now());
+    return static_cast<td::uint32>(td::Clocks::system());
   }
 
  protected:
diff --git a/crypto/fift/words.cpp b/crypto/fift/words.cpp
index ea4744c8..0b97ece9 100644
--- a/crypto/fift/words.cpp
+++ b/crypto/fift/words.cpp
@@ -942,7 +942,9 @@ void interpret_fetch(vm::Stack& stack, int mode) {
   auto n = stack.pop_smallint_range(256 + (mode & 1));
   auto cs = stack.pop_cellslice();
   if (!cs->have(n)) {
-    stack.push(std::move(cs));
+    if (mode & 2) {
+      stack.push(std::move(cs));
+    }
     stack.push_bool(false);
     if (!(mode & 4)) {
       throw IntError{"end of data while reading integer from cell"};
diff --git a/crypto/func/codegen.cpp b/crypto/func/codegen.cpp
index 0efea4d6..7e0d873f 100644
--- a/crypto/func/codegen.cpp
+++ b/crypto/func/codegen.cpp
@@ -628,7 +628,7 @@ bool Op::generate_code_step(Stack& stack) {
       stack.opt_show();
       StackLayout layout1 = stack.vars();
       bool next_empty = next->is_empty();
-      stack.o << (next_empty ? "WHILEEND:<{" : "WHILE:<{");
+      stack.o << "WHILE:<{";
       stack.o.indent();
       stack.forget_const();
       block0->generate_code_all(stack);
@@ -638,7 +638,7 @@ bool Op::generate_code_step(Stack& stack) {
       stack.modified();
       stack.o.undent();
       Stack stack_copy{stack};
-      stack.o << (next_empty ? "}>" : "}>DO<{");
+      stack.o << (next_empty ? "}>DO:" : "}>DO<{");
       if (!next_empty) {
         stack.o.indent();
       }
diff --git a/crypto/smartcont/highload-wallet-v2.fif b/crypto/smartcont/highload-wallet-v2.fif
new file mode 100644
index 00000000..76f06ed5
--- /dev/null
+++ b/crypto/smartcont/highload-wallet-v2.fif
@@ -0,0 +1,69 @@
+#!/usr/bin/env fift -s
+"TonUtil.fif" include
+
+{ ."usage: " @' $0 type ." <filename-base> <subwallet-id> <order-file> [<savefile>]" cr
+  ."Creates a request with up to 254 orders loaded from <order-file> to high-load v2 (sub)wallet created by new-highload-v2-wallet.fif, with private key loaded from file <filename-base>.pk "
+  ."and address from <filename-base><subwallet-id>.addr, and saves it into <savefile>.boc ('wallet-query.boc' by default)" cr 
+  ."<order-file> is a text file with lines `SEND <dest-addr> <amount>`" cr 1 halt
+} : usage
+$# dup 3 < swap 4 > or ' usage if
+
+$1 =: file-base
+$2 parse-int dup 32 fits ' usage ifnot =: subwallet-id   // parse subwallet-id
+{ subwallet-id (.) $+ } : +subwallet
+$3 =: order-file
+def? $4 { @' $4 } { "wallet-query" } cond constant savefile
+3 constant send-mode  // mode for SENDRAWMSG: +1 - sender pays fees, +2 - ignore errors
+60 constant timeout   // external message expires in 60 seconds
+
+file-base +subwallet +".addr" load-address
+2dup 2constant wallet_addr
+."Source wallet address = " 2dup .addr cr 6 .Addr cr
+file-base +".pk" load-keypair nip constant wallet_pk
+
+variable orders   dictnew orders !
+variable order#   order# 0!
+// c --
+{ <s order# @ dup 254 >= abort"more than 254 orders"
+  orders @ 16 udict!+ not abort"cannot add order to dictionary"
+  orders ! order# 1+!
+} : add-order
+// b body -- b'
+{ tuck <s 2dup s-fits? not rot over 1 i, -rot
+  { drop swap ref, } { s, nip } cond
+} : append-msg-body
+// ng wc addr bounce body -- c
+{ <b b{01} s, rot 1 i, b{000100} s, 2swap addr, rot Gram,
+  0 9 64 32 + + 1+ u, swap append-msg-body b>
+} : create-int-msg
+// ng wc addr bnc --
+{ ."Transferring " 3 roll .GR ."to account " 
+  -rot 2dup 4 pick 7 + .Addr ." = " .addr ." bounce=" . cr
+} : .transfer
+// addr$ ng -- c
+{ swap parse-smc-addr  // ng wc addr bnc 
+  2over 2over .transfer
+  <b 0 32 u, b> create-int-msg
+} : create-simple-transfer
+// c m -- c'
+{ <b swap 8 u, swap ref, b> } : create-order
+
+// addr$ ng --
+{ create-simple-transfer send-mode create-order add-order } : send
+{ bl word bl word $>GR send } : SEND
+
+// parse order file
+order-file include
+
+// create external message
+now timeout + 32 << <b orders @ dict, b> hashu 32 1<<1- and + =: query_id
+<b subwallet-id 32 i, query_id 64 u, orders @ dict, b>
+dup ."signing message: " <s csr. cr
+dup hashu wallet_pk ed25519_sign_uint
+<b b{1000100} s, wallet_addr addr, 0 Gram, b{00} s,
+   swap B, swap <s s, b>
+dup ."resulting external message: " <s csr. cr
+2 boc+>B dup Bx. cr
+."Query_id is " query_id dup . ."= 0x" X. cr
+savefile +".boc" tuck B>file
+."(Saved to file " type .")" cr
diff --git a/crypto/smartcont/new-highload-wallet-v2.fif b/crypto/smartcont/new-highload-wallet-v2.fif
new file mode 100644
index 00000000..df386cc7
--- /dev/null
+++ b/crypto/smartcont/new-highload-wallet-v2.fif
@@ -0,0 +1,47 @@
+#!/usr/bin/env fift -s
+"TonUtil.fif" include
+"Asm.fif" include
+
+{ ."usage: " @' $0 type ." <workchain-id> <subwallet-id> [<filename-base>]" cr
+  ."Creates a new v2 high-load wallet in the specified workchain, with the controlling private key saved to or loaded from <filename-base>.pk "
+  ."('new-wallet.pk' by default)" cr 
+  ."<subwallet-id> is the 32-bit identifier of this subwallet among all controlled by the same private key" cr 1 halt
+} : usage
+$# 2- -2 and ' usage if
+
+$1 parse-workchain-id =: wc    // set workchain id from command line argument
+$2 parse-int dup =: subwallet-id   // parse subwallet-id
+32 fits ' usage ifnot
+{ subwallet-id (.) $+ } : +subwallet
+def? $3 { @' $3 } { "new-wallet" } cond constant file-base
+65536 constant timeout   // init query times out in 65536 seconds
+
+."Creating new v2 high-load wallet in workchain " wc . 
+."with subwallet id " subwallet-id . cr
+
+// Create new high-load wallet; source code included from `highload-wallet-v2-code.fif`
+"highload-wallet-v2-code.fif" include
+// code
+<b subwallet-id 32 i, 0 64 u,
+   file-base +".pk" load-generate-keypair
+   constant wallet_pk
+   B, false 1 i,
+b> // data
+null // no libraries
+<b b{0011} s, 3 roll ref, rot ref, swap dict, b>  // create StateInit
+dup ."StateInit: " <s csr. cr
+dup hashu wc swap 2dup 2constant wallet_addr
+."new wallet address = " 2dup .addr cr
+2dup file-base +subwallet +".addr" save-address-verbose
+."Non-bounceable address (for init): " 2dup 7 .Addr cr
+."Bounceable address (for later access): " 6 .Addr cr
+now timeout + 32 << 1- dup =: query_id
+."Init query_id is " dup . ."(0x" X._ .")" cr
+<b subwallet-id 32 i, query_id 64 u, false 1 i, b>
+dup ."signing message: " <s csr. cr
+dup hashu wallet_pk ed25519_sign_uint rot
+<b b{1000100} s, wallet_addr addr, b{000010} s, swap <s s, b{0} s, swap B, swap <s s, b>
+dup ."External message for initialization is " <s csr. cr
+2 boc+>B dup Bx. cr
+file-base +subwallet +"-query.boc" tuck B>file
+."(Saved wallet creating query to file " type .")" cr
diff --git a/tl/generate/scheme/ton_api.tl b/tl/generate/scheme/ton_api.tl
index 89827f7f..65593139 100644
--- a/tl/generate/scheme/ton_api.tl
+++ b/tl/generate/scheme/ton_api.tl
@@ -466,6 +466,7 @@ db.lt.status.value total_shards:int = db.lt.status.Value;
 
 validator.groupMember public_key_hash:int256 adnl:int256 weight:long = engine.validator.GroupMember; 
 validator.group workchain:int shard:long catchain_seqno:int config_hash:int256 members:(vector validator.groupMember) = validator.Group; 
+validator.groupEx workchain:int shard:long vertical_seqno:int catchain_seqno:int config_hash:int256 members:(vector validator.groupMember) = validator.Group; 
 
 ---functions---
 
diff --git a/tl/generate/scheme/ton_api.tlo b/tl/generate/scheme/ton_api.tlo
index 6959d9a3..75381456 100644
Binary files a/tl/generate/scheme/ton_api.tlo and b/tl/generate/scheme/ton_api.tlo differ
diff --git a/validator/fabric.h b/validator/fabric.h
index 69f8fd3a..e7709f8d 100644
--- a/validator/fabric.h
+++ b/validator/fabric.h
@@ -27,6 +27,8 @@ namespace validator {
 
 td::actor::ActorOwn<Db> create_db_actor(td::actor::ActorId<ValidatorManager> manager, std::string db_root_,
                                         td::uint32 depth);
+td::actor::ActorOwn<LiteServerCache> create_liteserver_cache_actor(td::actor::ActorId<ValidatorManager> manager,
+                                                                   std::string db_root);
 
 td::Result<td::Ref<BlockData>> create_block(BlockIdExt block_id, td::BufferSlice data);
 td::Result<td::Ref<BlockData>> create_block(ReceivedBlock data);
@@ -71,7 +73,7 @@ void run_collate_query(ShardIdFull shard, td::uint32 min_ts, const BlockIdExt& m
                        td::actor::ActorId<ValidatorManager> manager, td::Timestamp timeout,
                        td::Promise<BlockCandidate> promise);
 void run_liteserver_query(td::BufferSlice data, td::actor::ActorId<ValidatorManager> manager,
-                          td::Promise<td::BufferSlice> promise);
+                          td::actor::ActorId<LiteServerCache> cache, td::Promise<td::BufferSlice> promise);
 void run_validate_shard_block_description(td::BufferSlice data, BlockHandle masterchain_block,
                                           td::Ref<MasterchainState> masterchain_state,
                                           td::actor::ActorId<ValidatorManager> manager, td::Timestamp timeout,
diff --git a/validator/impl/fabric.cpp b/validator/impl/fabric.cpp
index 5ad2a774..a037e122 100644
--- a/validator/impl/fabric.cpp
+++ b/validator/impl/fabric.cpp
@@ -43,6 +43,11 @@ td::actor::ActorOwn<Db> create_db_actor(td::actor::ActorId<ValidatorManager> man
   return td::actor::create_actor<RootDb>("db", manager, db_root_, depth);
 }
 
+td::actor::ActorOwn<LiteServerCache> create_liteserver_cache_actor(td::actor::ActorId<ValidatorManager> manager,
+                                                                   std::string db_root) {
+  return td::actor::create_actor<LiteServerCache>("cache");
+}
+
 td::Result<td::Ref<BlockData>> create_block(BlockIdExt block_id, td::BufferSlice data) {
   auto res = BlockQ::create(block_id, std::move(data));
   if (res.is_error()) {
@@ -196,7 +201,7 @@ void run_collate_query(ShardIdFull shard, td::uint32 min_ts, const BlockIdExt& m
 }
 
 void run_liteserver_query(td::BufferSlice data, td::actor::ActorId<ValidatorManager> manager,
-                          td::Promise<td::BufferSlice> promise) {
+                          td::actor::ActorId<LiteServerCache> cache, td::Promise<td::BufferSlice> promise) {
   LiteQuery::run_query(std::move(data), std::move(manager), std::move(promise));
 }
 
diff --git a/validator/interfaces/liteserver.h b/validator/interfaces/liteserver.h
new file mode 100644
index 00000000..ff1bf165
--- /dev/null
+++ b/validator/interfaces/liteserver.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#include "td/actor/actor.h"
+
+namespace ton {
+
+namespace validator {
+
+class LiteServerCache : public td::actor::Actor {
+ public:
+  virtual ~LiteServerCache() = default;
+};
+
+}  // namespace validator
+
+}  // namespace ton
diff --git a/validator/interfaces/validator-manager.h b/validator/interfaces/validator-manager.h
index a3260ab0..aaf40f49 100644
--- a/validator/interfaces/validator-manager.h
+++ b/validator/interfaces/validator-manager.h
@@ -26,6 +26,7 @@
 #include "shard-block.h"
 #include "message-queue.h"
 #include "validator/validator.h"
+#include "liteserver.h"
 
 namespace ton {
 
@@ -147,7 +148,7 @@ class ValidatorManager : public ValidatorManagerInterface {
   virtual void allow_block_info_gc(BlockIdExt block_id, td::Promise<bool> promise) = 0;
 
   virtual void check_is_hardfork(BlockIdExt block_id, td::Promise<bool> promise) = 0;
-  virtual void get_vertical_height(BlockSeqno seqno, td::Promise<td::uint32> promise) = 0;
+  virtual void get_vertical_seqno(BlockSeqno seqno, td::Promise<td::uint32> promise) = 0;
 
   virtual void update_last_known_key_block(BlockHandle handle, bool send_request) = 0;
   virtual void update_gc_block_handle(BlockHandle handle, td::Promise<td::Unit> promise) = 0;
diff --git a/validator/manager-disk.hpp b/validator/manager-disk.hpp
index 750a823f..c5fa38de 100644
--- a/validator/manager-disk.hpp
+++ b/validator/manager-disk.hpp
@@ -279,8 +279,8 @@ class ValidatorManagerImpl : public ValidatorManager {
     CHECK(block_id.is_masterchain());
     promise.set_result(opts_->is_hardfork(block_id));
   }
-  void get_vertical_height(BlockSeqno seqno, td::Promise<td::uint32> promise) override {
-    promise.set_result(opts_->get_vertical_height(seqno));
+  void get_vertical_seqno(BlockSeqno seqno, td::Promise<td::uint32> promise) override {
+    promise.set_result(opts_->get_vertical_seqno(seqno));
   }
   void run_ext_query(td::BufferSlice data, td::Promise<td::BufferSlice> promise) override {
     UNREACHABLE();
diff --git a/validator/manager.cpp b/validator/manager.cpp
index 142107a4..2d5b1175 100644
--- a/validator/manager.cpp
+++ b/validator/manager.cpp
@@ -73,7 +73,8 @@ void ValidatorManagerImpl::validate_block_is_next_proof(BlockIdExt prev_block_id
         promise.set_value(td::Unit());
       });
 
-  run_check_proof_query(next_block_id, pp.move_as_ok(), actor_id(this), td::Timestamp::in(2.0), std::move(P));
+  run_check_proof_query(next_block_id, pp.move_as_ok(), actor_id(this), td::Timestamp::in(2.0), std::move(P),
+                        opts_->is_hardfork(next_block_id));
 }
 
 void ValidatorManagerImpl::validate_block_proof(BlockIdExt block_id, td::BufferSlice proof,
@@ -91,7 +92,8 @@ void ValidatorManagerImpl::validate_block_proof(BlockIdExt block_id, td::BufferS
       promise.set_value(td::Unit());
     }
   });
-  run_check_proof_query(block_id, pp.move_as_ok(), actor_id(this), td::Timestamp::in(2.0), std::move(P));
+  run_check_proof_query(block_id, pp.move_as_ok(), actor_id(this), td::Timestamp::in(2.0), std::move(P),
+                        opts_->is_hardfork(block_id));
 }
 
 void ValidatorManagerImpl::validate_block_proof_link(BlockIdExt block_id, td::BufferSlice proof,
@@ -129,28 +131,30 @@ void ValidatorManagerImpl::validate_block_proof_rel(BlockIdExt block_id, BlockId
   });
 
   if (rel_block_id.id.seqno == 0) {
-    auto P = td::PromiseCreator::lambda([block_id, SelfId = actor_id(this), proof = pp.move_as_ok(),
-                                         promise = std::move(Q)](td::Result<td::Ref<ShardState>> R) mutable {
-      if (R.is_error()) {
-        promise.set_error(R.move_as_error());
-      } else {
-        auto s = td::Ref<MasterchainState>{R.move_as_ok()};
+    auto P = td::PromiseCreator::lambda(
+        [block_id, SelfId = actor_id(this), proof = pp.move_as_ok(), promise = std::move(Q),
+         skip_sig = opts_->is_hardfork(block_id)](td::Result<td::Ref<ShardState>> R) mutable {
+          if (R.is_error()) {
+            promise.set_error(R.move_as_error());
+          } else {
+            auto s = td::Ref<MasterchainState>{R.move_as_ok()};
 
-        run_check_proof_query(block_id, std::move(proof), SelfId, td::Timestamp::in(2.0), std::move(promise),
-                              std::move(s));
-      }
-    });
+            run_check_proof_query(block_id, std::move(proof), SelfId, td::Timestamp::in(2.0), std::move(promise),
+                                  std::move(s), skip_sig);
+          }
+        });
     get_shard_state_from_db_short(rel_block_id, std::move(P));
   } else {
-    auto P = td::PromiseCreator::lambda([block_id, SelfId = actor_id(this), proof = pp.move_as_ok(),
-                                         promise = std::move(Q)](td::Result<td::Ref<ProofLink>> R) mutable {
-      if (R.is_error()) {
-        promise.set_error(R.move_as_error());
-      } else {
-        run_check_proof_query(block_id, std::move(proof), SelfId, td::Timestamp::in(2.0), std::move(promise),
-                              R.move_as_ok());
-      }
-    });
+    auto P =
+        td::PromiseCreator::lambda([block_id, SelfId = actor_id(this), proof = pp.move_as_ok(), promise = std::move(Q),
+                                    skip_sig = opts_->is_hardfork(block_id)](td::Result<td::Ref<ProofLink>> R) mutable {
+          if (R.is_error()) {
+            promise.set_error(R.move_as_error());
+          } else {
+            run_check_proof_query(block_id, std::move(proof), SelfId, td::Timestamp::in(2.0), std::move(promise),
+                                  R.move_as_ok(), skip_sig);
+          }
+        });
     get_block_proof_link_from_db_short(rel_block_id, std::move(P));
   }
 }
@@ -464,7 +468,7 @@ void ValidatorManagerImpl::run_ext_query(td::BufferSlice data, td::Promise<td::B
     promise.set_value(std::move(data));
   });
 
-  run_liteserver_query(std::move(data), actor_id(this), std::move(P));
+  run_liteserver_query(std::move(data), actor_id(this), lite_server_cache_.get(), std::move(P));
 }
 
 void ValidatorManagerImpl::wait_block_state(BlockHandle handle, td::uint32 priority, td::Timestamp timeout,
@@ -1289,6 +1293,7 @@ void ValidatorManagerImpl::send_block_broadcast(BlockBroadcast broadcast) {
 
 void ValidatorManagerImpl::start_up() {
   db_ = create_db_actor(actor_id(this), db_root_, opts_->get_filedb_depth());
+  lite_server_cache_ = create_liteserver_cache_actor(actor_id(this), db_root_);
   token_manager_ = td::actor::create_actor<TokenManager>("tokenmanager");
 
   auto Q =
@@ -1583,13 +1588,19 @@ ValidatorSessionId ValidatorManagerImpl::get_validator_set_id(ShardIdFull shard,
                                                               td::Bits256 opts_hash) {
   std::vector<tl_object_ptr<ton_api::validator_groupMember>> vec;
   auto v = val_set->export_vector();
+  auto vert_seqno = opts_->get_maximal_vertical_seqno();
   for (auto &n : v) {
     auto pub_key = PublicKey{pubkeys::Ed25519{n.key}};
     vec.push_back(
         create_tl_object<ton_api::validator_groupMember>(pub_key.compute_short_id().bits256_value(), n.addr, n.weight));
   }
-  return create_hash_tl_object<ton_api::validator_group>(shard.workchain, shard.shard, val_set->get_catchain_seqno(),
-                                                         opts_hash, std::move(vec));
+  if (vert_seqno == 0) {
+    return create_hash_tl_object<ton_api::validator_group>(shard.workchain, shard.shard, val_set->get_catchain_seqno(),
+                                                           opts_hash, std::move(vec));
+  } else {
+    return create_hash_tl_object<ton_api::validator_groupEx>(shard.workchain, shard.shard, vert_seqno,
+                                                             val_set->get_catchain_seqno(), opts_hash, std::move(vec));
+  }
 }
 
 td::actor::ActorOwn<ValidatorGroup> ValidatorManagerImpl::create_validator_group(
@@ -1975,8 +1986,6 @@ void ValidatorManagerImpl::send_peek_key_block_request() {
 void ValidatorManagerImpl::prepare_stats(td::Promise<std::vector<std::pair<std::string, std::string>>> promise) {
   auto merger = StatsMerger::create(std::move(promise));
 
-  td::actor::send_closure(db_, &Db::prepare_stats, merger.make_promise("db."));
-
   std::vector<std::pair<std::string, std::string>> vec;
   vec.emplace_back("unixtime", td::to_string(static_cast<UnixTime>(td::Clocks::system())));
   if (last_masterchain_block_handle_) {
@@ -2004,6 +2013,8 @@ void ValidatorManagerImpl::prepare_stats(td::Promise<std::vector<std::pair<std::
   }
 
   merger.make_promise("").set_value(std::move(vec));
+
+  td::actor::send_closure(db_, &Db::prepare_stats, merger.make_promise("db."));
 }
 
 td::actor::ActorOwn<ValidatorManagerInterface> ValidatorManagerFactory::create(
diff --git a/validator/manager.hpp b/validator/manager.hpp
index 2b88696a..082432fa 100644
--- a/validator/manager.hpp
+++ b/validator/manager.hpp
@@ -432,8 +432,8 @@ class ValidatorManagerImpl : public ValidatorManager {
     CHECK(block_id.is_masterchain());
     promise.set_result(opts_->is_hardfork(block_id));
   }
-  void get_vertical_height(BlockSeqno seqno, td::Promise<td::uint32> promise) override {
-    promise.set_result(opts_->get_vertical_height(seqno));
+  void get_vertical_seqno(BlockSeqno seqno, td::Promise<td::uint32> promise) override {
+    promise.set_result(opts_->get_vertical_seqno(seqno));
   }
 
   void add_shard_block_description(td::Ref<ShardTopBlockDescription> desc);
@@ -522,6 +522,7 @@ class ValidatorManagerImpl : public ValidatorManager {
 
  private:
   td::actor::ActorOwn<adnl::AdnlExtServer> lite_server_;
+  td::actor::ActorOwn<LiteServerCache> lite_server_cache_;
   std::vector<td::uint16> pending_ext_ports_;
   std::vector<adnl::AdnlNodeIdShort> pending_ext_ids_;
 
diff --git a/validator/validator-options.hpp b/validator/validator-options.hpp
index 68711710..21bf79cb 100644
--- a/validator/validator-options.hpp
+++ b/validator/validator-options.hpp
@@ -67,7 +67,7 @@ struct ValidatorManagerOptionsImpl : public ValidatorManagerOptions {
     }
     return false;
   }
-  td::uint32 get_vertical_height(BlockSeqno seqno) const override {
+  td::uint32 get_vertical_seqno(BlockSeqno seqno) const override {
     size_t best = 0;
     for (size_t i = 0; i < hardforks_.size(); i++) {
       if (seqno >= hardforks_[i].seqno()) {
@@ -76,6 +76,12 @@ struct ValidatorManagerOptionsImpl : public ValidatorManagerOptions {
     }
     return static_cast<td::uint32>(best);
   }
+  td::uint32 get_maximal_vertical_seqno() const override {
+    return td::narrow_cast<td::uint32>(hardforks_.size());
+  }
+  td::uint32 get_last_fork_masterchain_seqno() const override {
+    return hardforks_.size() ? hardforks_.rbegin()->seqno() : 0;
+  }
   td::uint32 get_filedb_depth() const override {
     return db_depth_;
   }
diff --git a/validator/validator.h b/validator/validator.h
index 70b01e63..2e80c135 100644
--- a/validator/validator.h
+++ b/validator/validator.h
@@ -57,7 +57,9 @@ struct ValidatorManagerOptions : public td::CntObject {
   virtual td::ClocksBase::Duration key_proof_ttl() const = 0;
   virtual bool initial_sync_disabled() const = 0;
   virtual bool is_hardfork(BlockIdExt block_id) const = 0;
-  virtual td::uint32 get_vertical_height(BlockSeqno seqno) const = 0;
+  virtual td::uint32 get_vertical_seqno(BlockSeqno seqno) const = 0;
+  virtual td::uint32 get_maximal_vertical_seqno() const = 0;
+  virtual td::uint32 get_last_fork_masterchain_seqno() const = 0;
   virtual td::uint32 get_filedb_depth() const = 0;
   virtual td::uint32 key_block_utime_step() const {
     return 86400;