diff --git a/libraries/chain/controller.cpp b/libraries/chain/controller.cpp
index 83c7777f61..edc929fa40 100644
--- a/libraries/chain/controller.cpp
+++ b/libraries/chain/controller.cpp
@@ -331,6 +331,15 @@ struct block_data_t {
       }, v);
    }
 
+   block_state_ptr fork_db_fetch_bsp_by_num(uint32_t block_num) const {
+      return std::visit(overloaded{
+                           [](const block_data_legacy_t&) -> block_state_ptr { return nullptr; },
+                           [&](const block_data_new_t& bd) -> block_state_ptr {
+                              auto bsp = bd.fork_db.search_on_branch(bd.fork_db.head()->id(), block_num);
+                              return bsp; }
+                       }, v);
+   }
+
    template <class R, class F>
    R apply(F& f) {
       if constexpr (std::is_same_v<void, R>)
@@ -1053,6 +1062,7 @@ struct controller_impl {
    named_thread_pool<chain>        thread_pool;
    deep_mind_handler*              deep_mind_logger = nullptr;
    bool                            okay_to_print_integrity_hash_on_stop = false;
+   bls_key_map_t                   node_finalizer_keys;
 
    thread_local static platform_timer timer; // a copy for main thread and each read-only thread
 #if defined(EOSIO_EOS_VM_RUNTIME_ENABLED) || defined(EOSIO_EOS_VM_JIT_RUNTIME_ENABLED)
@@ -3000,6 +3010,29 @@ struct controller_impl {
       } FC_CAPTURE_AND_RETHROW();
    } /// apply_block
 
+   void create_and_send_vote_msg(const block_state_ptr& bsp) {
+#warning use decide_vote() for strong after it is implementd by https://github.com/AntelopeIO/leap/issues/2070
+      bool strong = true;
+
+      // A vote is created and signed by each finalizer configured on the node that
+      // in active finalizer policy
+      for (const auto& f: bsp->active_finalizer_policy->finalizers) {
+         auto it = node_finalizer_keys.find( f.public_key );
+         if( it != node_finalizer_keys.end() ) {
+            const auto& private_key = it->second;
+            const auto& digest = bsp->compute_finalizer_digest();
+
+            auto sig =  private_key.sign(std::vector<uint8_t>(digest.data(), digest.data() + digest.data_size()));
+
+            // construct the vote message
+            hs_vote_message vote{ bsp->id(), strong, private_key.get_public_key(), sig };
+
+            // net plugin subscribed this signal. it will broadcast the vote message
+            // on receiving the signal
+            emit( self.voted_block, vote );
+         }
+      }
+   }
 
    // thread safe, expected to be called from thread other than the main thread
    block_token create_block_state_i( const block_id_type& id, const signed_block_ptr& b, const block_header_state_legacy& prev ) {
@@ -3024,6 +3057,18 @@ struct controller_impl {
       return block_token{bsp};
    }
 
+   void integrate_received_qc_to_block(const block_id_type& id, const signed_block_ptr& b) {
+#warning validate received QC before integrate it: https://github.com/AntelopeIO/leap/issues/2071
+      // extract QC from block extensions
+      auto block_exts = b->validate_and_extract_extensions();
+      if( block_exts.count(quorum_certificate_extension::extension_id()) > 0 ) {
+         const auto& qc_ext = std::get<quorum_certificate_extension>(block_exts. lower_bound(quorum_certificate_extension::extension_id())->second);
+         auto last_qc_block_bsp = block_data.fork_db_fetch_bsp_by_num( qc_ext.qc.block_height );
+#warning a mutex might be needed for updating valid_pc
+         last_qc_block_bsp->valid_qc = qc_ext.qc.qc;
+      }
+   }
+
    // thread safe, expected to be called from thread other than the main thread
    block_token create_block_state_i( const block_id_type& id, const signed_block_ptr& b, const block_header_state& prev ) {
       auto trx_mroot = calculate_trx_merkle( b->transactions, true );
@@ -3044,6 +3089,12 @@ struct controller_impl {
 
       EOS_ASSERT( id == bsp->id(), block_validate_exception,
                   "provided id ${id} does not match block id ${bid}", ("id", id)("bid", bsp->id()) );
+
+      create_and_send_vote_msg(bsp);
+
+      // integrate the received QC into the claimed block
+      integrate_received_qc_to_block(id, b);
+
       return block_token{bsp};
    }
 
@@ -3605,6 +3656,12 @@ struct controller_impl {
       wasmif.code_block_num_last_used(code_hash, vm_type, vm_version, block_num);
    }
 
+   void set_node_finalizer_keys(const bls_pub_priv_key_map_t& finalizer_keys) {
+      for (const auto& k : finalizer_keys) {
+         node_finalizer_keys[bls_public_key{k.first}] = bls_private_key{k.second};
+      }
+   }
+
    bool                 irreversible_mode()      const { return read_mode == db_read_mode::IRREVERSIBLE; }
    const block_id_type& fork_db_head_block_id()  const { return block_data.fork_db_head_block_id(irreversible_mode()); }
    uint32_t             fork_db_head_block_num() const { return block_data.fork_db_head_block_num(irreversible_mode()); }
@@ -4646,6 +4703,10 @@ void controller::code_block_num_last_used(const digest_type& code_hash, uint8_t
    return my->code_block_num_last_used(code_hash, vm_type, vm_version, block_num);
 }
 
+void controller::set_node_finalizer_keys(const bls_pub_priv_key_map_t& finalizer_keys) {
+   my->set_node_finalizer_keys(finalizer_keys);
+}
+
 /// Protocol feature activation handlers:
 
 template<>
diff --git a/libraries/chain/include/eosio/chain/block_header_state.hpp b/libraries/chain/include/eosio/chain/block_header_state.hpp
index f18e3137a7..138a847f3a 100644
--- a/libraries/chain/include/eosio/chain/block_header_state.hpp
+++ b/libraries/chain/include/eosio/chain/block_header_state.hpp
@@ -67,7 +67,8 @@ struct block_header_state {
 
 
    // ------ functions -----------------------------------------------------------------
-   digest_type           compute_finalizer_digest() const;
+#warning TDDO https://github.com/AntelopeIO/leap/issues/2080
+   digest_type           compute_finalizer_digest() const { return id; };
    block_timestamp_type  timestamp() const { return header.timestamp; }
    account_name          producer() const  { return header.producer; }
    const block_id_type&  previous() const  { return header.previous; }
diff --git a/libraries/chain/include/eosio/chain/controller.hpp b/libraries/chain/include/eosio/chain/controller.hpp
index df01872a5b..402209b563 100644
--- a/libraries/chain/include/eosio/chain/controller.hpp
+++ b/libraries/chain/include/eosio/chain/controller.hpp
@@ -375,6 +375,7 @@ namespace eosio::chain {
          signal<void(const block_signal_params&)>  accepted_block;
          signal<void(const block_signal_params&)>  irreversible_block;
          signal<void(std::tuple<const transaction_trace_ptr&, const packed_transaction_ptr&>)> applied_transaction;
+         signal<void(const hs_vote_message&)>      voted_block;
 
          const apply_handler* find_apply_handler( account_name contract, scope_name scope, action_name act )const;
          wasm_interface& get_wasm_interface();
@@ -396,6 +397,7 @@ namespace eosio::chain {
       void set_to_read_window();
       bool is_write_window() const;
       void code_block_num_last_used(const digest_type& code_hash, uint8_t vm_type, uint8_t vm_version, uint32_t block_num);
+      void set_node_finalizer_keys(const bls_pub_priv_key_map_t& finalizer_keys);
 
       private:
          friend class apply_context;
diff --git a/plugins/chain_interface/include/eosio/chain/plugin_interface.hpp b/plugins/chain_interface/include/eosio/chain/plugin_interface.hpp
index 2bd78ac800..bf8a159f73 100644
--- a/plugins/chain_interface/include/eosio/chain/plugin_interface.hpp
+++ b/plugins/chain_interface/include/eosio/chain/plugin_interface.hpp
@@ -16,9 +16,10 @@ namespace eosio::chain::plugin_interface {
    namespace channels {
       using rejected_block         = channel_decl<struct rejected_block_tag,        signed_block_ptr>;
       using accepted_block_header  = channel_decl<struct accepted_block_header_tag, block_signal_params>;
-      using accepted_block         = channel_decl<struct accepted_block_tag, block_signal_params>;
-      using irreversible_block     = channel_decl<struct irreversible_block_tag,block_signal_params>;
+      using accepted_block         = channel_decl<struct accepted_block_tag,        block_signal_params>;
+      using irreversible_block     = channel_decl<struct irreversible_block_tag,    block_signal_params>;
       using applied_transaction    = channel_decl<struct applied_transaction_tag,   transaction_trace_ptr>;
+      using voted_block            = channel_decl<struct voted_block_tag,           hs_vote_message>;
    }
 
    namespace methods {
diff --git a/plugins/net_plugin/net_plugin.cpp b/plugins/net_plugin/net_plugin.cpp
index 9665397071..f0dff2408b 100644
--- a/plugins/net_plugin/net_plugin.cpp
+++ b/plugins/net_plugin/net_plugin.cpp
@@ -534,6 +534,7 @@ namespace eosio {
 
       void on_accepted_block_header( const signed_block_ptr& block, const block_id_type& id );
       void on_accepted_block();
+      void on_voted_block ( const hs_vote_message& vote );
 
       void transaction_ack(const std::pair<fc::exception_ptr, packed_transaction_ptr>&);
       void on_irreversible_block( const block_id_type& id, uint32_t block_num );
@@ -3940,6 +3941,11 @@ namespace eosio {
       on_active_schedule(chain_plug->chain().active_producers());
    }
 
+   // called from application thread
+   void net_plugin_impl::on_voted_block(const hs_vote_message& vote) {
+      bcast_hs_message(std::nullopt, chain::hs_message{ vote });
+   }
+
    void net_plugin_impl::bcast_hs_message( const std::optional<uint32_t>& exclude_peer, const chain::hs_message& msg ) {
       fc_dlog(logger, "sending hs msg: ${msg}", ("msg", msg));
 
@@ -4366,6 +4372,9 @@ namespace eosio {
             my->on_irreversible_block( id, block->block_num() );
          } );
 
+         cc.voted_block.connect( [my = shared_from_this()]( const hs_vote_message& vote ) {
+            my->on_voted_block(vote);
+         } );
       }
 
       {
diff --git a/plugins/producer_plugin/producer_plugin.cpp b/plugins/producer_plugin/producer_plugin.cpp
index a65bafa471..f2478176f2 100644
--- a/plugins/producer_plugin/producer_plugin.cpp
+++ b/plugins/producer_plugin/producer_plugin.cpp
@@ -492,7 +492,7 @@ class producer_plugin_impl : public std::enable_shared_from_this<producer_plugin
 
    using signature_provider_type = signature_provider_plugin::signature_provider_type;
    std::map<chain::public_key_type, signature_provider_type> _signature_providers;
-   chain::bls_pub_priv_key_map_t                  _finalizer_keys; // public, private
+   chain::bls_pub_priv_key_map_t                     _finalizer_keys; // public, private
    std::set<chain::account_name>                     _producers;
    boost::asio::deadline_timer                       _timer;
    block_timing_util::producer_watermarks            _producer_watermarks;
@@ -1339,6 +1339,9 @@ void producer_plugin_impl::plugin_startup() {
          EOS_ASSERT(_producers.empty() || chain_plug->accept_transactions(), plugin_config_exception,
                     "node cannot have any producer-name configured because no block production is possible with no [api|p2p]-accepted-transactions");
 
+         chain.set_node_finalizer_keys(_finalizer_keys);
+
+#warning TODO remove create_pacemaker
          chain.create_pacemaker(_producers, std::move(_finalizer_keys), hotstuff_logger);
          _finalizer_keys.clear();