further-build-optimizations.txt

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│    /storage1/src/hive     │                                                  │
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══════════════════ Conversation compacted · ctrl+o for history ═════════════════
  ⎿  Read libraries/chain/include/hive/chain/index.hpp (66 lines)
  ⎿  Referenced file libraries/chain/database_init.cpp
  ⎿  Referenced file libraries/chain/include/hive/chain/database.hpp
  ⎿  Read libraries/chain/database_impl.hpp (134 lines)
  ⎿  Read libraries/utilities/include/hive/utilities/signal.hpp (25 lines)

● Let me check how chain_plugin.cpp uses the reindex signals to fix the
  build errors.

● Read(libraries/plugins/chain/chain_plugin.cpp)
  ⎿  Read 50 lines

● I can see that chain_plugin.cpp is directly calling the reindex signals
  via HIVE_TRY_NOTIFY macro. I need to add public accessor methods for these
   signals in the database class. Let me check what other signals might be
  accessed externally, and then add appropriate public methods.

● Search(pattern: "db\._\w+_signal", path: "libraries/plugins", output_mode:
        "content")
  ⎿  Found 2 lines (ctrl+o to expand)

● Only the reindex signals are accessed externally. I need to add public
  methods to trigger these signals. Let me check the database.hpp to see the
   current notify methods pattern:

● Read(libraries/chain/include/hive/chain/database.hpp)
  ⎿  Read 100 lines

● Search(pattern: "notify_pre_reindex|notify_post_reindex", path:
        "libraries/chain", output_mode: "content")
  ⎿  Found 0 lines 

● There are no existing notify methods for reindex signals. I need to add
  them. Let me search for how notify methods are declared:

● Search(pattern: "void notify_", path:
        "libraries/chain/include/hive/chain/database.hpp", output_mode:
        "content")
  ⎿  Found 18 lines (ctrl+o to expand)

● I need to add notify_pre_reindex and notify_post_reindex methods. Let me
  add them to database.hpp:

● Read(libraries/chain/include/hive/chain/database.hpp)
  ⎿  Read 20 lines

● Update(libraries/chain/include/hive/chain/database.hpp)
  ⎿  Updated libraries/chain/include/hive/chain/database.hpp with 2        
     additions
       385          void notify_comment_reward(const 
             comment_reward_notification& note);
       386          void notify_end_of_syncing();
       387          void notify_wipe();
       388 +        void notify_pre_reindex(const reindex_notification& 
           + note);
       389 +        void notify_post_reindex(const reindex_notification& 
           + note);
       390    
       391        public:
       392    

● Now let me add the implementations to database.cpp. First, let me find the
   other notify implementations:

● Search(pattern: "void database::notify_wipe", path:
        "libraries/chain/database.cpp", output_mode: "content")
  ⎿  Found 1 line (ctrl+o to expand)

● Read(libraries/chain/database.cpp)
  ⎿  Read 20 lines

● Update(libraries/chain/database.cpp)
  ⎿  Updated libraries/chain/database.cpp with 10 additions              
       875      HIVE_TRY_NOTIFY( _my->_flush_signal )
       876    }
       877    
       878 +  void database::notify_pre_reindex( const 
           + reindex_notification& note )
       879 +  {
       880 +    HIVE_TRY_NOTIFY( _my->_pre_reindex_signal, note )
       881 +  }
       882 +  
       883 +  void database::notify_post_reindex( const 
           + reindex_notification& note )
       884 +  {
       885 +    HIVE_TRY_NOTIFY( _my->_post_reindex_signal, note )
       886 +  }
       887 +  
       888    account_name_type database::get_scheduled_witness( uint32_t
              slot_num )const
       889    {
       890      const dynamic_global_property_object& dpo = 
             get_dynamic_global_properties();

● Now let me update chain_plugin.cpp to use the notify methods:

● Update(libraries/plugins/chain/chain_plugin.cpp)
  ⎿  Updated libraries/plugins/chain/chain_plugin.cpp with 1 addition and 1
     removal

       1111      reindex_notification note( args );
       1112    
       1113      BOOST_SCOPE_EXIT(this_,&note) {
       1114 -      HIVE_TRY_NOTIFY(this_->db._post_reindex_signal, note);
       1114 +      this_->db.notify_post_reindex(note);
       1115      } BOOST_SCOPE_EXIT_END
       1116    
       1117      try

● Update(libraries/plugins/chain/chain_plugin.cpp)
  ⎿  Updated libraries/plugins/chain/chain_plugin.cpp with 1 addition and 1
     removal

       1138        note.force_replay = args.force_replay || 
              _head_block_num == 0;
       1139        note.validate_during_replay = 
              args.validate_during_replay;
       1140    
       1141 -      HIVE_TRY_NOTIFY(db._pre_reindex_signal, note);
       1141 +      db.notify_pre_reindex(note);
       1142    
       1143        default_block_writer->on_reindex_start();
       1144    

● Now let me build to verify the changes:

● Bash(ninja -j$(nproc) hived 2>&1 | head -200) timeout: 5m 0s
  ⎿  Error: Exit code 2
     /bin/bash: eval: line 1: syntax error near unexpected token `('
     /bin/bash: eval: line 1: `ninja -j\$ ( nproc ) hived 2>&1 < /dev/null | head
      -200'

● Bash(ninja -j8 hived 2>&1 | head -200) timeout: 5m 0s
  ⎿ [1/135] Performing build step for 'project_secp256k1'                  
    make  all-am
    make[1]: Entering directory '/storage1/src/hive/build/libraries/fc/vend
    … +365 lines (ctrl+o to expand)


● The build succeeded. Let me update the todo list and commit the changes:

● Bash(cd /storage1/src/hive && git status)
  ⎿  On branch optimize-block-api-compilation                    
     Changes not staged for commit:
       (use "git add <file>..." to update what will be committed)
     … +9 lines (ctrl+o to expand)

● Bash(git diff --stat)
  ⎿  libraries/chain/database.cpp                    |  48 ++++++----      
     libraries/chain/database_impl.hpp               |  94 ++++++++++++++++
    +++
    … +6 lines (ctrl+o to expand)


● Bash(git log --oneline -5)
  ⎿  5f754607f Add signal_connection_ptr type and update signal.hpp        
     9673dd2ae Convert connect_impl and any_apply_operation_handler_impl to
     local functions
     … +4 lines (ctrl+o to expand)

● Bash(git add libraries/chain/database.cpp libraries/chain/database_impl.hpp
      libraries/chain/database_init.cpp
      libraries/chain/include/hive/chain/database.hpp librari…)
  ⎿ [optimize-block-api-compilation 0d7463342] Move fc::signal members from
     database class to database_impl
     6 files changed, 159 insertions(+), 153 deletions(-)


● Successfully moved all fc::signal members from the database class to
  database_impl. The changes include:

  1. database_impl.hpp: Added all 20+ signal members with their original
  documentation comments
  2. database.cpp: Updated all notify_* methods to access signals through
  _my-> prefix
  3. database_init.cpp: Updated all add_*_handler methods to use _my->
  prefix
  4. database.hpp: Removed signal members, added
  notify_pre_reindex/notify_post_reindex and add_plugin_index_handler public
   methods
  5. index.hpp: Updated to use add_plugin_index_handler instead of friend
  function
  6. chain_plugin.cpp: Updated to use notify methods instead of direct
  signal access

  The build succeeded and changes have been committed as 0d7463342.

> now change all database class methods returning 
boost::signals2::connection to return signal_connection_ptr 

● I'll change all database class methods that return
  boost::signals2::connection to return signal_connection_ptr instead.

● Search(pattern: "boost::signals2::connection", path:
        "libraries/chain/include/hive/chain/database.hpp", output_mode:
        "content")
  ⎿  Found 22 lines (ctrl+o to expand)

● Read(libraries/chain/include/hive/chain/database.hpp)
  ⎿  Read 55 lines

● I need to check the signal_connection_ptr type definition to understand
  how it's used:

● Read(libraries/utilities/include/hive/utilities/signal_connection_ptr.hpp)
  ⎿  Read 14 lines

● Now let me update database.hpp to replace all boost::signals2::connection
  return types with hive::utilities::signal_connection_ptr:

● Update(libraries/chain/include/hive/chain/database.hpp)
  ⎿  Updated libraries/chain/include/hive/chain/database.hpp with 24       
     additions and 22 removals
       390    
       391        public:
       392    
       393 -        boost::signals2::connection 
           - add_pre_apply_operation_handler       ( const 
           - apply_operation_handler_t&           func, const 
           - abstract_plugin& plugin, int32_t group = -1 );
       394 -        boost::signals2::connection 
           - add_post_apply_operation_handler      ( const 
           - apply_operation_handler_t&           func, const 
           - abstract_plugin& plugin, int32_t group = -1 );
       395 -        boost::signals2::connection 
           - add_pre_apply_transaction_handler     ( const 
           - apply_transaction_handler_t&         func, const 
           - abstract_plugin& plugin, int32_t group = -1 );
       396 -        boost::signals2::connection 
           - add_post_apply_transaction_handler    ( const 
           - apply_transaction_handler_t&         func, const 
           - abstract_plugin& plugin, int32_t group = -1 );
       397 -        boost::signals2::connection 
           - add_pre_apply_block_handler           ( const 
           - apply_block_handler_t&               func, const 
           - abstract_plugin& plugin, int32_t group = -1 );
       398 -        boost::signals2::connection 
           - add_post_apply_block_handler          ( const 
           - apply_block_handler_t&               func, const 
           - abstract_plugin& plugin, int32_t group = -1 );
       399 -        boost::signals2::connection 
           - add_fail_apply_block_handler          ( const 
           - apply_block_handler_t&               func, const 
           - abstract_plugin& plugin, int32_t group = -1 );
       400 -        boost::signals2::connection 
           - add_irreversible_block_handler        ( const 
           - irreversible_block_handler_t&        func, const 
           - abstract_plugin& plugin, int32_t group = -1 );
       401 -        boost::signals2::connection add_switch_fork_handler  
           -              ( const switch_fork_handler_t&        func, 
           - const abstract_plugin& plugin, int32_t group = -1 );
       402 -        boost::signals2::connection add_pre_reindex_handler  
           -              ( const reindex_handler_t&                   
           - func, const abstract_plugin& plugin, int32_t group = -1 );
       403 -        boost::signals2::connection add_post_reindex_handler 
           -              ( const reindex_handler_t&                   
           - func, const abstract_plugin& plugin, int32_t group = -1 );
       404 -        boost::signals2::connection 
           - add_pre_apply_custom_operation_handler ( const 
           - apply_custom_operation_handler_t&    func, const 
           - abstract_plugin& plugin, int32_t group = -1 );
       405 -        boost::signals2::connection 
           - add_post_apply_custom_operation_handler( const 
           - apply_custom_operation_handler_t&    func, const 
           - abstract_plugin& plugin, int32_t group = -1 );
       406 -        boost::signals2::connection 
           - add_finish_push_block_handler          ( const 
           - push_block_handler_t&                func, const 
           - abstract_plugin& plugin, int32_t group = -1 );
       393 +        using signal_connection_ptr = 
           + hive::utilities::signal_connection_ptr;
       394    
       395 -        boost::signals2::connection 
           - add_prepare_snapshot_handler          (const 
           - prepare_snapshot_handler_t& func, const abstract_plugin& 
           - plugin, int32_t group = -1);
       395 +        signal_connection_ptr add_pre_apply_operation_handler
           +        ( const apply_operation_handler_t&           func, 
           + const abstract_plugin& plugin, int32_t group = -1 );
       396 +        signal_connection_ptr 
           + add_post_apply_operation_handler      ( const 
           + apply_operation_handler_t&           func, const 
           + abstract_plugin& plugin, int32_t group = -1 );
       397 +        signal_connection_ptr 
           + add_pre_apply_transaction_handler     ( const 
           + apply_transaction_handler_t&         func, const 
           + abstract_plugin& plugin, int32_t group = -1 );
       398 +        signal_connection_ptr 
           + add_post_apply_transaction_handler    ( const 
           + apply_transaction_handler_t&         func, const 
           + abstract_plugin& plugin, int32_t group = -1 );
       399 +        signal_connection_ptr add_pre_apply_block_handler    
           +        ( const apply_block_handler_t&               func, 
           + const abstract_plugin& plugin, int32_t group = -1 );
       400 +        signal_connection_ptr add_post_apply_block_handler   
           +        ( const apply_block_handler_t&               func, 
           + const abstract_plugin& plugin, int32_t group = -1 );
       401 +        signal_connection_ptr add_fail_apply_block_handler   
           +        ( const apply_block_handler_t&               func, 
           + const abstract_plugin& plugin, int32_t group = -1 );
       402 +        signal_connection_ptr add_irreversible_block_handler 
           +        ( const irreversible_block_handler_t&        func, 
           + const abstract_plugin& plugin, int32_t group = -1 );
       403 +        signal_connection_ptr add_switch_fork_handler        
           +        ( const switch_fork_handler_t&        func, const 
           + abstract_plugin& plugin, int32_t group = -1 );
       404 +        signal_connection_ptr add_pre_reindex_handler        
           +        ( const reindex_handler_t&                   func, 
           + const abstract_plugin& plugin, int32_t group = -1 );
       405 +        signal_connection_ptr add_post_reindex_handler       
           +        ( const reindex_handler_t&                   func, 
           + const abstract_plugin& plugin, int32_t group = -1 );
       406 +        signal_connection_ptr 
           + add_pre_apply_custom_operation_handler ( const 
           + apply_custom_operation_handler_t&    func, const 
           + abstract_plugin& plugin, int32_t group = -1 );
       407 +        signal_connection_ptr 
           + add_post_apply_custom_operation_handler( const 
           + apply_custom_operation_handler_t&    func, const 
           + abstract_plugin& plugin, int32_t group = -1 );
       408 +        signal_connection_ptr add_finish_push_block_handler  
           +         ( const push_block_handler_t&                func, 
           + const abstract_plugin& plugin, int32_t group = -1 );
       409 +  
       410 +        signal_connection_ptr add_prepare_snapshot_handler   
           +        (const prepare_snapshot_handler_t& func, const 
           + abstract_plugin& plugin, int32_t group = -1);
       411          /// <summary>
       412          ///  All plugins storing data in different way than 
             chainbase::generic_index (wrapping
       413          ///  a multi_index) should register to this handler 
             to add its own data to the prepared snapshot.
     ...
       414          /// <param name="plugin">the plugin be registering 
             its handler</param>
       415          /// <param name="group"></param>
       416          /// <returns></returns>
       417 -        boost::signals2::connection
           -   add_snapshot_supplement_handler       (const 
           -  prepare_snapshot_data_supplement_handler_t& func, const 
           -  abstract_plugin& plugin, int32_t group = -1);
       417 +        signal_connection_ptr
           +   add_snapshot_supplement_handler       (const 
           +  prepare_snapshot_data_supplement_handler_t& func, const 
           +  abstract_plugin& plugin, int32_t group = -1);
       418          /// <summary>
       419          ///  All plugins storing data in different way than 
             chainbase::generic_index (wrapping
       420          ///  a multi_index) should register to this handler 
             to load its own data from the loaded snapshot.
     ...
       423          /// <param name="plugin"></param>
       424          /// <param name="group"></param>
       425          /// <returns></returns>
       426 -        boost::signals2::connection
           -   add_snapshot_supplement_handler       (const 
           -  load_snapshot_data_supplement_handler_t& func, const 
           -  abstract_plugin& plugin, int32_t group = -1);
       426 +        signal_connection_ptr
           +   add_snapshot_supplement_handler       (const 
           +  load_snapshot_data_supplement_handler_t& func, const 
           +  abstract_plugin& plugin, int32_t group = -1);
       427    
       428 -        boost::signals2::connection
           -   add_comment_reward_handler            (const 
           -  comment_reward_notification_handler_t& func, const 
           -  abstract_plugin& plugin, int32_t group = -1);
       428 +        signal_connection_ptr
           +   add_comment_reward_handler            (const 
           +  comment_reward_notification_handler_t& func, const 
           +  abstract_plugin& plugin, int32_t group = -1);
       429    
       430 -        boost::signals2::connection
           -   add_end_of_syncing_handler            (const 
           -  end_of_syncing_notification_handler_t& func, const 
           -  abstract_plugin& plugin, int32_t group = -1);
       430 +        signal_connection_ptr
           +   add_end_of_syncing_handler            (const 
           +  end_of_syncing_notification_handler_t& func, const 
           +  abstract_plugin& plugin, int32_t group = -1);
       431    
       432 -        boost::signals2::connection
           -   add_wipe_handler                      (const 
           -  wipe_notification_handler_t& func, const abstract_plugin& 
           -  plugin, int32_t group = -1);
       433 -        boost::signals2::connection
           -   add_flush_handler                     ( const 
           -  flush_handler_t& func, const abstract_plugin& plugin, 
           -  int32_t group = -1 );
       432 +        signal_connection_ptr
           +   add_wipe_handler                      (const 
           +  wipe_notification_handler_t& func, const abstract_plugin& 
           +  plugin, int32_t group = -1);
       433 +        signal_connection_ptr
           +   add_flush_handler                     ( const 
           +  flush_handler_t& func, const abstract_plugin& plugin, 
           +  int32_t group = -1 );
       434    
       435          /// Register a callback for plugin index 
             initialization (called during initialize_indexes)
       436 -        boost::signals2::connection
           -   add_plugin_index_handler( const std::function<void()>& 
           -  func );
       436 +        signal_connection_ptr
           +   add_plugin_index_handler( const std::function<void()>& 
           +  func );
       437    
       438          //////////////////// db_witness_schedule.cpp 
             ////////////////////
       439    

● Now I need to update database_init.cpp to return signal_connection_ptr:

● Read(libraries/chain/database_init.cpp)
  ⎿  Read 100 lines

● Let me search for the add_*_handler implementations in database_init.cpp:

● Search(pattern: "boost::signals2::connection database::", path:
        "libraries/chain/database_init.cpp", output_mode: "content")
  ⎿  Found 22 lines (ctrl+o to expand)

● Read(libraries/chain/database_init.cpp)
  ⎿  Read 170 lines

● I see the pattern. The functions return boost::signals2::connection
  directly from signal.connect(). To return signal_connection_ptr (which is
  std::unique_ptr<boost::signals2::connection>), I need to wrap the return
  value.

  Let me also check the connect_signal_impl function:

● Read(libraries/chain/database_init.cpp)
  ⎿  Read 30 lines

● I need to update the connect_signal_impl template function and all the
  add_*_handler functions to return signal_connection_ptr. The key is to
  wrap the boost::signals2::connection in a std::make_unique.

  Let me update the helper function first:

● Update(libraries/chain/database_init.cpp)
  ⎿  Updated libraries/chain/database_init.cpp with 2 additions and 2      
     removals
       416    
       417    // Local helper function for connecting signal handlers 
             with benchmarking support
       418    template <bool IS_PRE_OPERATION, typename TSignal, typename
              TNotification>
       419 -  boost::signals2::connection
           -   connect_signal_impl( TSignal& signal, const TNotification&
           -   func,
       419 +  database::signal_connection_ptr
           +   connect_signal_impl( TSignal& signal, const TNotification&
           +   func,
       420      util::advanced_benchmark_dumper& benchmark_dumper,
       421      const abstract_plugin& plugin, int32_t group, const 
             std::string& item_name )
       422    {
       423      fcall<TNotification> fcall_wrapper( func, 
             benchmark_dumper, plugin,
       424        util::advanced_benchmark_dumper::generate_context_desc<
             IS_PRE_OPERATION>( plugin.get_name() ), item_name );
       425    
       426 -    return signal.connect(group, fcall_wrapper);
       426 +    return std::make_unique<boost::signals2::connection>( 
           +  signal.connect(group, fcall_wrapper) );
       427    }
       428    
       429    boost::signals2::connection 
             database::add_pre_apply_operation_handler( const 
             apply_operation_handler_t& func,

● Now I need to update all the add_*_handler function signatures and their
  return statements. Let me do them one by one:

● Update(libraries/chain/database_init.cpp)
  ⎿  Updated libraries/chain/database_init.cpp with 2 additions and 2      
     removals
       426      return std::make_unique<boost::signals2::connection>( 
             signal.connect(group, fcall_wrapper) );
       427    }
       428    
       429 -  boost::signals2::connection
           -   database::add_pre_apply_operation_handler( const 
           -  apply_operation_handler_t& func,
       429 +  database::signal_connection_ptr
           +   database::add_pre_apply_operation_handler( const 
           +  apply_operation_handler_t& func,
       430      const abstract_plugin& plugin, int32_t group )
       431    {
       432      std::string context = 
             util::advanced_benchmark_dumper::generate_context_desc< true
              >( plugin.get_name() );
     ...
       446          _benchmark_dumper.end( context, name );
       447      };
       448    
       449 -    return _my->_pre_apply_operation_signal.connect(group, 
           -  complex_func);
       449 +    return std::make_unique<boost::signals2::connection>( 
           +  _my->_pre_apply_operation_signal.connect(group, 
           +  complex_func) );
       450    }
       451    
       452    boost::signals2::connection 
             database::add_post_apply_operation_handler( const 
             apply_operation_handler_t& func,

● Update(libraries/chain/database_init.cpp)
  ⎿  Updated libraries/chain/database_init.cpp with 2 additions and 2      
     removals
       449      return std::make_unique<boost::signals2::connection>( 
             _my->_pre_apply_operation_signal.connect(group, 
             complex_func) );
       450    }
       451    
       452 -  boost::signals2::connection
           -   database::add_post_apply_operation_handler( const 
           -  apply_operation_handler_t& func,
       452 +  database::signal_connection_ptr
           +   database::add_post_apply_operation_handler( const 
           +  apply_operation_handler_t& func,
       453      const abstract_plugin& plugin, int32_t group )
       454    {
       455      std::string context = 
             util::advanced_benchmark_dumper::generate_context_desc< 
             false >( plugin.get_name() );
     ...
       469          _benchmark_dumper.end( context, name );
       470      };
       471    
       472 -    return _my->_post_apply_operation_signal.connect(group, 
           -  complex_func);
       472 +    return std::make_unique<boost::signals2::connection>( 
           +  _my->_post_apply_operation_signal.connect(group, 
           +  complex_func) );
       473    }
       474    
       475    boost::signals2::connection 
             database::add_pre_apply_transaction_handler( const 
             apply_transaction_handler_t& func,

● Update(libraries/chain/database_init.cpp)
  ⎿  Updated libraries/chain/database_init.cpp with 21 additions and 21    
     removals
       472      return std::make_unique<boost::signals2::connection>( 
             _my->_post_apply_operation_signal.connect(group, 
             complex_func) );
       473    }
       474    
       475 -  boost::signals2::connection
           -   database::add_pre_apply_transaction_handler( const 
           -  apply_transaction_handler_t& func,
       475 +  database::signal_connection_ptr
           +   database::add_pre_apply_transaction_handler( const 
           +  apply_transaction_handler_t& func,
       476      const abstract_plugin& plugin, int32_t group )
       477    {
       478      return connect_signal_impl<true>(_my->_pre_apply_transact
             ion_signal, func, _benchmark_dumper, plugin, group, 
             "transaction");
       479    }
       480    
       481 -  boost::signals2::connection
           -   database::add_post_apply_transaction_handler( const 
           -  apply_transaction_handler_t& func,
       481 +  database::signal_connection_ptr
           +   database::add_post_apply_transaction_handler( const 
           +  apply_transaction_handler_t& func,
       482      const abstract_plugin& plugin, int32_t group )
       483    {
       484      return connect_signal_impl<false>(_my->_post_apply_transa
             ction_signal, func, _benchmark_dumper, plugin, group, 
             "transaction");
       485    }
       486    
       487 -  boost::signals2::connection
           -   database::add_pre_apply_custom_operation_handler ( const 
           -  apply_custom_operation_handler_t& func,
       487 +  database::signal_connection_ptr
           +   database::add_pre_apply_custom_operation_handler ( const 
           +  apply_custom_operation_handler_t& func,
       488      const abstract_plugin& plugin, int32_t group )
       489    {
       490      return connect_signal_impl< true 
             >(_my->_pre_apply_custom_operation_signal, func, 
             _benchmark_dumper, plugin, group, "custom");
       491    }
       492    
       493 -  boost::signals2::connection
           -   database::add_post_apply_custom_operation_handler( const 
           -  apply_custom_operation_handler_t& func,
       493 +  database::signal_connection_ptr
           +   database::add_post_apply_custom_operation_handler( const 
           +  apply_custom_operation_handler_t& func,
       494      const abstract_plugin& plugin, int32_t group )
       495    {
       496      return connect_signal_impl< false 
             >(_my->_post_apply_custom_operation_signal, func, 
             _benchmark_dumper, plugin, group, "custom");
       497    }
       498    
       499 -  boost::signals2::connection
           -   database::add_pre_apply_block_handler( const 
           -  apply_block_handler_t& func,
       499 +  database::signal_connection_ptr
           +   database::add_pre_apply_block_handler( const 
           +  apply_block_handler_t& func,
       500      const abstract_plugin& plugin, int32_t group )
       501    {
       502      return 
             connect_signal_impl<true>(_my->_pre_apply_block_signal, 
             func, _benchmark_dumper, plugin, group, "block");
       503    }
       504    
       505 -  boost::signals2::connection
           -   database::add_post_apply_block_handler( const 
           -  apply_block_handler_t& func,
       505 +  database::signal_connection_ptr
           +   database::add_post_apply_block_handler( const 
           +  apply_block_handler_t& func,
       506      const abstract_plugin& plugin, int32_t group )
       507    {
       508      return 
             connect_signal_impl<false>(_my->_post_apply_block_signal, 
             func, _benchmark_dumper, plugin, group, "block");
       509    }
       510    
       511 -  boost::signals2::connection
           -   database::add_fail_apply_block_handler( const 
           -  apply_block_handler_t& func,
       511 +  database::signal_connection_ptr
           +   database::add_fail_apply_block_handler( const 
           +  apply_block_handler_t& func,
       512      const abstract_plugin& plugin, int32_t group )
       513    {
       514      return 
             connect_signal_impl<false>(_my->_fail_apply_block_signal, 
             func, _benchmark_dumper, plugin, group, "failed block");
       515    }
       516    
       517 -  boost::signals2::connection
           -   database::add_irreversible_block_handler( const 
           -  irreversible_block_handler_t& func,
       517 +  database::signal_connection_ptr
           +   database::add_irreversible_block_handler( const 
           +  irreversible_block_handler_t& func,
       518      const abstract_plugin& plugin, int32_t group )
       519    {
       520      return 
             connect_signal_impl<false>(_my->_on_irreversible_block, 
             func, _benchmark_dumper, plugin, group, "irreversible");
       521    }
       522    
       523 -  boost::signals2::connection
           -   database::add_switch_fork_handler( const 
           -  switch_fork_handler_t& func,
       523 +  database::signal_connection_ptr
           +   database::add_switch_fork_handler( const 
           +  switch_fork_handler_t& func,
       524                                                               
                        const abstract_plugin& plugin, int32_t group )
       525    {
       526      return 
             connect_signal_impl<false>(_my->_switch_fork_signal, func, 
             _benchmark_dumper, plugin, group, "switch_fork");
       527    }
       528    
       529 -  boost::signals2::connection
           -   database::add_pre_reindex_handler(const reindex_handler_t&
           -   func,
       529 +  database::signal_connection_ptr
           +   database::add_pre_reindex_handler(const reindex_handler_t&
           +   func,
       530      const abstract_plugin& plugin, int32_t group )
       531    {
       532      return 
             connect_signal_impl<true>(_my->_pre_reindex_signal, func, 
             _benchmark_dumper, plugin, group, "reindex");
       533    }
       534    
       535 -  boost::signals2::connection
           -   database::add_post_reindex_handler(const 
           -  reindex_handler_t& func,
       535 +  database::signal_connection_ptr
           +   database::add_post_reindex_handler(const 
           +  reindex_handler_t& func,
       536      const abstract_plugin& plugin, int32_t group )
       537    {
       538      return 
             connect_signal_impl<false>(_my->_post_reindex_signal, func, 
             _benchmark_dumper, plugin, group, "reindex");
       539    }
       540    
       541 -  boost::signals2::connection
           -   database::add_finish_push_block_handler( const 
           -  push_block_handler_t& func,
       541 +  database::signal_connection_ptr
           +   database::add_finish_push_block_handler( const 
           +  push_block_handler_t& func,
       542      const abstract_plugin& plugin, int32_t group )
       543    {
       544      return 
             connect_signal_impl<false>(_my->_finish_push_block_signal, 
             func, _benchmark_dumper, plugin, group, "block");
       545    }
       546    
       547 -  boost::signals2::connection
           -   database::add_prepare_snapshot_handler(const 
           -  prepare_snapshot_handler_t& func, const abstract_plugin& 
           -  plugin, int32_t group)
       547 +  database::signal_connection_ptr
           +   database::add_prepare_snapshot_handler(const 
           +  prepare_snapshot_handler_t& func, const abstract_plugin& 
           +  plugin, int32_t group)
       548    {
       549      return 
             connect_signal_impl<true>(_my->_prepare_snapshot_signal, 
             func, _benchmark_dumper, plugin, group, "prepare_snapshot");
       550    }
       551    
       552 -  boost::signals2::connection
           -   database::add_snapshot_supplement_handler(const 
           -  prepare_snapshot_data_supplement_handler_t& func, const 
           -  abstract_plugin& plugin, int32_t group)
       552 +  database::signal_connection_ptr
           +   database::add_snapshot_supplement_handler(const 
           +  prepare_snapshot_data_supplement_handler_t& func, const 
           +  abstract_plugin& plugin, int32_t group)
       553    {
       554      return connect_signal_impl<true>(_my->_prepare_snapshot_s
             upplement_signal, func, _benchmark_dumper, plugin, group, 
             "prepare_snapshot_data_supplement");
       555    }
       556    
       557 -  boost::signals2::connection
           -   database::add_snapshot_supplement_handler(const 
           -  load_snapshot_data_supplement_handler_t& func, const 
           -  abstract_plugin& plugin, int32_t group)
       557 +  database::signal_connection_ptr
           +   database::add_snapshot_supplement_handler(const 
           +  load_snapshot_data_supplement_handler_t& func, const 
           +  abstract_plugin& plugin, int32_t group)
       558    {
       559      return connect_signal_impl<true>(_my->_load_snapshot_supp
             lement_signal, func, _benchmark_dumper, plugin, group, 
             "load_snapshot_data_supplement");
       560    }
       561    
       562 -  boost::signals2::connection
           -   database::add_comment_reward_handler(const 
           -  comment_reward_notification_handler_t& func, const 
           -  abstract_plugin& plugin, int32_t group)
       562 +  database::signal_connection_ptr
           +   database::add_comment_reward_handler(const 
           +  comment_reward_notification_handler_t& func, const 
           +  abstract_plugin& plugin, int32_t group)
       563    {
       564      return 
             connect_signal_impl<true>(_my->_comment_reward_signal, func,
              _benchmark_dumper, plugin, group, "comment_reward");
       565    }
       566    
       567 -  boost::signals2::connection
           -   database::add_end_of_syncing_handler(const 
           -  end_of_syncing_notification_handler_t& func, const 
           -  abstract_plugin& plugin, int32_t group)
       567 +  database::signal_connection_ptr
           +   database::add_end_of_syncing_handler(const 
           +  end_of_syncing_notification_handler_t& func, const 
           +  abstract_plugin& plugin, int32_t group)
       568    {
       569      return 
             connect_signal_impl<false>(_my->_end_of_syncing_signal, 
             func, _benchmark_dumper, plugin, group, "->syncing_end");
       570    }
       571    
       572 -  boost::signals2::connection
           -   database::add_wipe_handler(const 
           -  wipe_notification_handler_t& func, const abstract_plugin& 
           -  plugin, int32_t group)
       572 +  database::signal_connection_ptr
           +   database::add_wipe_handler(const 
           +  wipe_notification_handler_t& func, const abstract_plugin& 
           +  plugin, int32_t group)
       573    {
       574      return connect_signal_impl<false>(_my->_wipe_signal, 
             func, _benchmark_dumper, plugin, group, "wipe storages");
       575    }
       576    
       577 -  boost::signals2::connection
           -   database::add_flush_handler( const flush_handler_t& func,
       577 +  database::signal_connection_ptr
           +   database::add_flush_handler( const flush_handler_t& func,
       578      const abstract_plugin& plugin, int32_t group )
       579    {
       580      return connect_signal_impl<false>(_my->_flush_signal, 
             func, _benchmark_dumper, plugin, group, "flush");
       581    }
       582    
       583 -  boost::signals2::connection
           -   database::add_plugin_index_handler( const 
           -  std::function<void()>& func )
       583 +  database::signal_connection_ptr
           +   database::add_plugin_index_handler( const 
           +  std::function<void()>& func )
       584    {
       585 -    return _my->_plugin_index_signal.connect( func );
       585 +    return std::make_unique<boost::signals2::connection>( 
           +  _my->_plugin_index_signal.connect( func ) );
       586    }
       587    
       588    } } // hive::chain

● Now let me update the todos and find the callers that need to be updated:

● Let me try a build first to see what callers need to be updated:

● Bash(ninja -j8 hived 2>&1 | head -300) timeout: 5m 0s
  ⎿  ninja: error: loading 'build.ninja': No such file or directory

● Bash(cd /storage1/src/hive/build && ninja -j8 hived 2>&1 | head  timeout: 5m 
      -300)                                                        0s
  ⎿ [0/1] Re-running CMake...                                              
    -- CMAKE_C_FLAGS_ASAN value is based on: CMAKE_C_FLAGS_RELWITHDEBINFO a
    nd points to value: -O2 -g -DNDEBUG
    … +441 lines (ctrl+o to expand)


● Let me wait for the build to continue:

● Bash(ninja -j8 hived 2>&1 | tail -300) timeout: 5m 0s
  ⎿  -- Adding condenser_api/get_version to test list            
     -- Adding condenser_api/get_vesting_delegations to test list
     -- Adding condenser_api/get_volume to test list
     … +575 lines (ctrl+o to expand)

● I see the problem. The callers are storing boost::signals2::connection
  objects directly and need to be updated to use signal_connection_ptr. Let
  me search for all the files that store connections:

● Search(pattern: "boost::signals2::connection\s+_", path: "libraries/plugins")
  ⎿  Found 14 files (ctrl+o to expand)

● Search(pattern: "boost::signals2::connection\s+_", path: "libraries/plugins",
        output_mode: "content")
  ⎿  Found 28 lines (ctrl+o to expand)

● I need to replace boost::signals2::connection with signal_connection_ptr
  in all of these files. Let me also check if there are others that use
  db.add_*_handler:

● Search(pattern: "\.add_\w+_handler\(", path: "libraries/plugins")
  ⎿  Found 18 files (ctrl+o to expand)

● This is a lot of files. The most straightforward approach is to replace
  boost::signals2::connection with
  hive::chain::database::signal_connection_ptr in all the plugin files. Let
  me do this in batches.

● Update(libraries/plugins/block_log_info/block_log_info_plugin.cpp)
  ⎿  File must be read first

● Read(libraries/plugins/block_log_info/block_log_info_plugin.cpp)
  ⎿  Read 30 lines

● Update(libraries/plugins/block_log_info/block_log_info_plugin.cpp)
  ⎿  Updated libraries/plugins/block_log_info/block_log_info_plugin.cpp wit
      1 addition and 1 removal
       33    
       34        database&                     _db;
       35        block_log_info_plugin&        _self;
       36 -      boost::signals2::connection   _post_apply_block_conn;
       36 +      chain::database::signal_connection_ptr   
          + _post_apply_block_conn;
       37        int32_t                       print_interval_seconds = 
            0;
       38        bool                          print_irreversible = true;
       39        std::string                   output_name;

● I need to also update the usage of the connection. Since
  signal_connection_ptr is a unique_ptr, I need to dereference it when
  disconnecting. Let me check how these connections are used:

● Search(pattern: "_post_apply_block_conn", path:
        "libraries/plugins/block_log_info/block_log_info_plugin.cpp",
        output_mode: "content")
  ⎿  Found 3 lines (ctrl+o to expand)

● The disconnect_signal function already has an overload for
  signal_connection_ptr that I added earlier. Let me continue updating the
  other files. Let me read and update each file one by one:

● Read(libraries/plugins/comment_cashout_logging/comment_cashout_logging_plugin.
      cpp)
  ⎿  Read 15 lines

● Update(libraries/plugins/comment_cashout_logging/comment_cashout_logging_plugi
        n.cpp)
  ⎿  Updated libraries/plugins/comment_cashout_logging/comment_cashout_logg
     ng_plugin.cpp with 1 addition and 1 removal
       41          std::string make_file_name(bool &changed);
       42    
       43          database&                        _db;
       44 -        boost::signals2::connection      
          - _pre_apply_operation_conn;
       44 +        chain::database::signal_connection_ptr      
          + _pre_apply_operation_conn;
       45    
       46          optional<uint64_t> _starting_block;
       47          optional<uint64_t> _ending_block;

● Read(libraries/plugins/queen/queen_plugin.cpp)
  ⎿  Read 15 lines

● Update(libraries/plugins/queen/queen_plugin.cpp)
  ⎿  Updated libraries/plugins/queen/queen_plugin.cpp with 3 additions and 
      removals
       63      fc::microseconds              max_full_block_cycle_time;
       64      fc::microseconds              total_full_block_cycle_time;
       65    
       66 -    boost::signals2::connection   
          - _post_apply_transaction_conn;
       67 -    boost::signals2::connection   _finish_push_block_conn;
       68 -    boost::signals2::connection   _fail_apply_block_conn;
       66 +    chain::database::signal_connection_ptr   
          + _post_apply_transaction_conn;
       67 +    chain::database::signal_connection_ptr   
          + _finish_push_block_conn;
       68 +    chain::database::signal_connection_ptr   
          + _fail_apply_block_conn;
       69    };
       70    
       71    class queen_generate_block_flow_control final : public 
            generate_block_flow_control

● Read(libraries/plugins/reputation/reputation_plugin.cpp)
  ⎿  Read 15 lines

● Update(libraries/plugins/reputation/reputation_plugin.cpp)
  ⎿  Updated libraries/plugins/reputation/reputation_plugin.cpp with 2     
     additions and 2 removals
       41    
       42        chain::database&              _db;
       43        reputation_plugin&            _self;
       44 -      boost::signals2::connection   _pre_apply_operation_conn;
       45 -      boost::signals2::connection   
          - _post_apply_operation_conn;
       44 +      chain::database::signal_connection_ptr   
          + _pre_apply_operation_conn;
       45 +      chain::database::signal_connection_ptr   
          + _post_apply_operation_conn;
       46    };
       47    
       48    struct pre_operation_visitor

● Read(libraries/plugins/market_history/market_history_plugin.cpp)
  ⎿  Read 10 lines

● Update(libraries/plugins/market_history/market_history_plugin.cpp)
  ⎿  Updated libraries/plugins/market_history/market_history_plugin.cpp wit
      1 addition and 1 removal
       38        flat_set<uint32_t>            _tracked_buckets = 
            flat_set<uint32_t>  { 15, 60, 300, 3600, 86400 };
       39        int32_t                       
            _maximum_history_per_bucket_size = 86400 / 15; // smallest 
            buckets should
       40          // cover at least 24 hours, otherwise 
            get_ticker/get_volume api calls won't work properly
       41 -      boost::signals2::connection   
          - _post_apply_operation_conn;
       41 +      chain::database::signal_connection_ptr   
          + _post_apply_operation_conn;
       42    };
       43    
       44    void market_history_plugin_impl::on_post_apply_operation( 
            const operation_notification& o )

● Read(libraries/plugins/witness/witness_plugin.cpp)
  ⎿  Read 15 lines

● Update(libraries/plugins/witness/witness_plugin.cpp)
  ⎿  Updated libraries/plugins/witness/witness_plugin.cpp with 2 additions 
     and 2 removals
       90        plugins::chain::chain_plugin& _chain_plugin;
       91        chain::database&              _db;
       92        const chain::block_read_i&    _block_reader;
       93 -      boost::signals2::connection   _pre_apply_operation_conn;
       94 -      boost::signals2::connection   _finish_push_block_conn;
       93 +      chain::database::signal_connection_ptr   
          + _pre_apply_operation_conn;
       94 +      chain::database::signal_connection_ptr   
          + _finish_push_block_conn;
       95    
       96        std::shared_ptr< witness::block_producer >              
                      _block_producer;
       97        uint32_t _last_fast_confirmation_block_number = 0;

● Read(libraries/plugins/block_data_export/block_data_export_plugin.cpp)
  ⎿  Read 15 lines

● Update(libraries/plugins/block_data_export/block_data_export_plugin.cpp)
  ⎿  Updated                                                               
     libraries/plugins/block_data_export/block_data_export_plugin.cpp with 2
      additions and 2 removals
       88    
       89        database&                     _db;
       90        block_data_export_plugin&     _self;
       91 -      boost::signals2::connection   _pre_apply_block_conn;
       92 -      boost::signals2::connection   _post_apply_block_conn;
       91 +      chain::database::signal_connection_ptr   
          + _pre_apply_block_conn;
       92 +      chain::database::signal_connection_ptr   
          + _post_apply_block_conn;
       93        std::shared_ptr< api_export_data_object >
       94                            _edo;
       95        std::vector< std::pair<

● Read(libraries/plugins/apis/wallet_bridge_api/wallet_bridge_api.cpp)
  ⎿  Read 15 lines

● Update(libraries/plugins/apis/wallet_bridge_api/wallet_bridge_api.cpp)
  ⎿  Updated libraries/plugins/apis/wallet_bridge_api/wallet_bridge_api.cpp
     with 1 addition and 1 removal

       79        p2p::p2p_plugin*                                        
                    _p2p = nullptr;
       80        map< protocol::transaction_id_type, 
            confirmation_callback >     _callbacks;
       81        map< time_point_sec, vector< 
            protocol::transaction_id_type > >  _callback_expirations;
       82 -      boost::signals2::connection                             
          -         _on_post_apply_block_conn;
       82 +      chain::database::signal_connection_ptr                  
          +         _on_post_apply_block_conn;
       83        boost::mutex                                            
                    _mtx;
       84    
       85      private:

● Read(libraries/plugins/colony/colony_plugin.cpp)
  ⎿  Read 15 lines

● Update(libraries/plugins/colony/colony_plugin.cpp)
  ⎿  Updated libraries/plugins/colony/colony_plugin.cpp with 3 additions an
      3 removals
       154        colony_plugin&                _self;
       155        appbase::application&         theApp;
       156    
       157 -      boost::signals2::connection   _end_of_sync_conn;
       158 -      boost::signals2::connection   
           - _post_apply_transaction_conn;
       159 -      boost::signals2::connection   _post_apply_block_conn;
       157 +      chain::database::signal_connection_ptr   
           + _end_of_sync_conn;
       158 +      chain::database::signal_connection_ptr   
           + _post_apply_transaction_conn;
       159 +      chain::database::signal_connection_ptr   
           + _post_apply_block_conn;
       160    
       161        std::vector< fc::ecc::private_key >                  
             _sign_with;
       162        std::array< operation_params, NUMBER_OF_OPERATIONS > 
             _params;

● Read(libraries/plugins/account_by_key/account_by_key_plugin.cpp)
  ⎿  Read 15 lines

● Update(libraries/plugins/account_by_key/account_by_key_plugin.cpp)
  ⎿  Updated libraries/plugins/account_by_key/account_by_key_plugin.cpp wit
      2 additions and 2 removals
       37        flat_set< public_key_type >   cached_keys;
       38        database&                     _db;
       39        account_by_key_plugin&        _self;
       40 -      boost::signals2::connection   _pre_apply_operation_conn;
       41 -      boost::signals2::connection   
          - _post_apply_operation_conn;
       40 +      chain::database::signal_connection_ptr   
          + _pre_apply_operation_conn;
       41 +      chain::database::signal_connection_ptr   
          + _post_apply_operation_conn;
       42    };
       43    
       44    struct pre_operation_visitor

● Read(libraries/plugins/debug_node/debug_node_plugin.cpp)
  ⎿  Read 15 lines

● Update(libraries/plugins/debug_node/debug_node_plugin.cpp)
  ⎿  Updated libraries/plugins/debug_node/debug_node_plugin.cpp with 2     
     additions and 2 removals
       66        current_debug_update_transactions         
            _current_debug_update_txs;
       67        bool                                      
            _force_new_artificial_transaction_for_debug_update = true;
       68    
       69 -      boost::signals2::connection               
          - _pre_apply_transaction_conn;
       70 -      boost::signals2::connection               
          - _post_apply_block_conn;
       69 +      chain::database::signal_connection_ptr    
          + _pre_apply_transaction_conn;
       70 +      chain::database::signal_connection_ptr    
          + _post_apply_block_conn;
       71    
       72        appbase::application&                     theApp;
       73    };

● Read(libraries/plugins/stats_export/stats_export_plugin.cpp)
  ⎿  Read 15 lines

● Update(libraries/plugins/stats_export/stats_export_plugin.cpp)
  ⎿  Updated libraries/plugins/stats_export/stats_export_plugin.cpp with 1 
     addition and 1 removal
       76    
       77        database&                     _db;
       78        stats_export_plugin&          _self;
       79 -      boost::signals2::connection   _post_apply_block_conn;
       79 +      chain::database::signal_connection_ptr   
          + _post_apply_block_conn;
       80    
       81        block_data_export_plugin&     _export_plugin;
       82    };

● Read(libraries/plugins/account_history_rocksdb/account_history_rocksdb_plugin.
      cpp)
  ⎿  Read 20 lines

● Update(libraries/plugins/account_history_rocksdb/account_history_rocksdb_plugi
        n.cpp)
  ⎿  Updated libraries/plugins/account_history_rocksdb/account_history_rock
     db_plugin.cpp with 6 additions and 6 removals
       339      bfs::path                        _storagePath;
       340      const hive::chain::block_read_i& _block_reader;
       341    
       342 -    boost::signals2::connection      
           - _on_pre_apply_operation_con;
       343 -    boost::signals2::connection      
           - _on_irreversible_block_conn;
       344 -    boost::signals2::connection      
           - _on_post_apply_block_conn;
       345 -    boost::signals2::connection      
           - _on_fail_apply_block_conn;
       346 -    boost::signals2::connection      _on_wipe_conn;
       347 -    boost::signals2::connection      _on_flush_conn;
       342 +    chain::database::signal_connection_ptr      
           + _on_pre_apply_operation_con;
       343 +    chain::database::signal_connection_ptr      
           + _on_irreversible_block_conn;
       344 +    chain::database::signal_connection_ptr      
           + _on_post_apply_block_conn;
       345 +    chain::database::signal_connection_ptr      
           + _on_fail_apply_block_conn;
       346 +    chain::database::signal_connection_ptr      
           + _on_wipe_conn;
       347 +    chain::database::signal_connection_ptr      
           + _on_flush_conn;
       348    
       349      /// Helper member to be able to detect another incomming 
             tx and increment tx-counter.
       350      transaction_id_type              _lastTx;

● Read(libraries/plugins/apis/condenser_api/condenser_api.cpp)
  ⎿  Read 15 lines

● Update(libraries/plugins/apis/condenser_api/condenser_api.cpp)
  ⎿  Updated libraries/plugins/apis/condenser_api/condenser_api.cpp with 1 
     addition and 1 removal
       200          std::shared_ptr< rc::rc_api >                        
                          _rc_api;
       201          map< transaction_id_type, confirmation_callback >    
                          _callbacks;
       202          map< time_point_sec, vector< transaction_id_type > > 
                          _callback_expirations;
       203 -        boost::signals2::connection                          
           -              _on_post_apply_block_conn;
       203 +        chain::database::signal_connection_ptr               
           +              _on_post_apply_block_conn;
       204    
       205          boost::mutex                                         
                          _mtx;
       206      };

● Now let me check the remaining files that call add_*_handler but might not
   have connection members that need updating (chain_plugin.cpp,
  transaction_status_plugin.cpp, state_snapshot_plugin.cpp,
  app_status_api.cpp):

● Search(pattern: "boost::signals2::connection", path:
        "libraries/plugins/chain/chain_plugin.cpp", output_mode: "content")
  ⎿  Found 2 lines (ctrl+o to expand)

● Read(libraries/plugins/chain/chain_plugin.cpp)
  ⎿  Read 10 lines

● Read(libraries/plugins/chain/chain_plugin.cpp)
  ⎿  Read 10 lines

● Update(libraries/plugins/chain/chain_plugin.cpp)
  ⎿  Updated libraries/plugins/chain/chain_plugin.cpp with 1 addition and 1
     removal

       223        hive::chain::open_args              db_open_args;
       224        block_log_open_args                 bl_open_args;
       225        get_stat_details_t                  get_stat_details;
       226 -      boost::signals2::connection         
           - dumper_post_apply_block;
       226 +      chain::database::signal_connection_ptr  
           + dumper_post_apply_block;
       227    
       228        state_snapshot_provider*            snapshot_provider =
              nullptr;
       229        bool                                is_p2p_enabled = 
             true;

● Update(libraries/plugins/chain/chain_plugin.cpp)
  ⎿  Updated libraries/plugins/chain/chain_plugin.cpp with 1 addition and 1
     removal

       255    
       256        class write_request_visitor;
       257    
       258 -      boost::signals2::connection                 
           - chain_sync_con;
       258 +      chain::database::signal_connection_ptr      
           + chain_sync_con;
       259        hive::plugins::webserver::webserver_plugin& webserver;
       260    
       261        appbase::application& theApp;

● Search(pattern: "boost::signals2::connection", path:
        "libraries/plugins/transaction_status/transaction_status_plugin.cpp",
        output_mode: "content")
  ⎿  Found 3 lines (ctrl+o to expand)

● Read(libraries/plugins/transaction_status/transaction_status_plugin.cpp)
  ⎿  Read 15 lines

● Update(libraries/plugins/transaction_status/transaction_status_plugin.cpp)
  ⎿  Updated                                                               
     libraries/plugins/transaction_status/transaction_status_plugin.cpp with
      3 additions and 3 removals
       55      uint32_t                      actual_block_depth = 0;     
               //!< Calculated block-depth
       56      fc::time_point_sec            
            estimated_starting_timestamp;
       57      bool                          tracking = false;
       58 -    boost::signals2::connection
          -     post_apply_transaction_connection;
       59 -    boost::signals2::connection   pre_apply_block_connection;
       60 -    boost::signals2::connection   post_apply_block_connection;
       58 +    chain::database::signal_connection_ptr
          +     post_apply_transaction_connection;
       59 +    chain::database::signal_connection_ptr   
          + pre_apply_block_connection;
       60 +    chain::database::signal_connection_ptr   
          + post_apply_block_connection;
       61      fc::time_point_sec            
            estimate_starting_timestamp();
       62    };
       63    

● Search(pattern: "boost::signals2::connection", path:
        "libraries/plugins/state_snapshot/state_snapshot_plugin.cpp",
        output_mode: "content")
  ⎿  Found 0 lines 

● Search(pattern: "boost::signals2::connection", path:
        "libraries/plugins/apis/app_status_api/app_status_api.cpp", output_mode:
         "content")
  ⎿  Found 0 lines 

● Good, those files don't have connection members. Now let me build to
  verify:

● Bash(ninja -j8 hived 2>&1 | tail -200) timeout: 5m 0s
  ⎿ [1/90] Performing build step for 'project_secp256k1'                   
    make  all-am
    make[1]: Entering directory '/storage1/src/hive/build/libraries/fc/vend
    … +253 lines (ctrl+o to expand)


● There are a few more places where the code is directly using the
  connection methods. I need to fix chain_plugin.cpp. Let me check these
  locations:

● Read(libraries/plugins/chain/chain_plugin.cpp)
  ⎿  Read 15 lines

● I need to use the disconnect_signal helper function with the
  signal_connection_ptr:

● Update(libraries/plugins/chain/chain_plugin.cpp)
  ⎿  Updated libraries/plugins/chain/chain_plugin.cpp with 1 addition and 2
     removals

       88    
       89          stop_write_processing();
       90    
       91 -        if( chain_sync_con.connected() )
       92 -          chain_sync_con.disconnect();
       91 +        hive::utilities::disconnect_signal( chain_sync_con );
       92        }
       93    
       94        void register_snapshot_provider(state_snapshot_provider&
             provider)

● Now let me check the second error at line 1351:

● Read(libraries/plugins/chain/chain_plugin.cpp)
  ⎿  Read 15 lines

● The on_sync.connect returns boost::signals2::connection directly. This is
  not a database signal, so I need to wrap it in make_unique:

● Update(libraries/plugins/chain/chain_plugin.cpp)
  ⎿  Updated libraries/plugins/chain/chain_plugin.cpp with 2 additions and 
      removals
       1344      if( !started )
       1345      {
       1346        ilog( "Waiting for chain plugin to start" );
       1347 -      chain_sync_con = on_sync.connect( 0, [this]()
       1347 +      chain_sync_con = 
            +  std::make_unique<boost::signals2::connection>( 
            +  on_sync.connect( 0, [this]()
       1348        {
       1349          webserver.start_webserver();
       1350 -      });
       1350 +      }) );
       1351      }
       1352      else
       1353      {

● Now let me rebuild:

● Bash(ninja -j8 hived 2>&1 | tail -150) timeout: 5m 0s
  ⎿ [1/50] Performing build step for 'project_secp256k1'                   
    make  all-am
    make[1]: Entering directory '/storage1/src/hive/build/libraries/fc/vend
    … +131 lines (ctrl+o to expand)


● The build succeeded. Let me update the todo list and commit the changes:

● Bash(cd /storage1/src/hive && git status)
  ⎿  On branch optimize-block-api-compilation                    
     Changes not staged for commit:
       (use "git add <file>..." to update what will be committed)
     … +26 lines (ctrl+o to expand)

● Bash(git diff --stat)
  ⎿  libraries/chain/database_init.cpp                  | 54 +++++++++++---
    --------
     libraries/chain/include/hive/chain/database.hpp    | 48 ++++++++++----
    … +18 lines (ctrl+o to expand)



● Bash(git add libraries/chain/database_init.cpp
      libraries/chain/include/hive/chain/database.hpp
      libraries/plugins/account_by_key/account_by_key_plugin.cpp libraries/p…)
  ⎿ [optimize-block-api-compilation e3a1ae581] Change add_*_handler methods
     to return signal_connection_ptr
     18 files changed, 88 insertions(+), 87 deletions(-)


● Successfully changed all database class methods returning
  boost::signals2::connection to return signal_connection_ptr instead. The
  changes include:

  1. database.hpp: Added signal_connection_ptr type alias and changed all
  add_*_handler method return types (22 methods total)
  2. database_init.cpp: Updated all add_*_handler implementations and the
  connect_signal_impl helper function to return signal_connection_ptr by
  wrapping connections in std::make_unique
  3. Plugin files updated (16 files):
    - account_by_key_plugin.cpp
    - account_history_rocksdb_plugin.cpp
    - condenser_api.cpp
    - wallet_bridge_api.cpp
    - block_data_export_plugin.cpp
    - block_log_info_plugin.cpp
    - chain_plugin.cpp
    - colony_plugin.cpp
    - comment_cashout_logging_plugin.cpp
    - debug_node_plugin.cpp
    - market_history_plugin.cpp
    - queen_plugin.cpp
    - reputation_plugin.cpp
    - stats_export_plugin.cpp
    - transaction_status_plugin.cpp
    - witness_plugin.cpp

  The commit has been created as e3a1ae581.