Commented xblock_t variant event value type.

include/bitcoin/node/define.hpp

@@ -64,10 +64,10 @@ typedef std::shared_ptr<database::associations> map_ptr;
 typedef std::function<void(const code&, const map_ptr&,
     const job::ptr&)> map_handler;
 
-/// Node events.
+/// Event desubscriber key type.
 using object_key = uint64_t;
 
-/// Use for event_value variants (all unsigned integral integers).
+/// Event value types.
 using count_t = size_t;
 using height_t = size_t;
 using channel_t = uint64_t;
@@ -82,16 +82,24 @@ typedef system::chain::block::cptr block_t;
 ////    system::chain::block::cptr block;
 ////} xblock_t;
 
-// std::variant types must be distinct, and xcode size_t is neither uint32_t 
-// nor uint64_t, so this ensures we have the distinct set of necessary types.
+/// std::variant types must be distinct, and xcode size_t is neither uint32_t 
+/// nor uint64_t, so this ensures we have the distinct set of necessary types.
 using event_value =
     iif<is_same_type<std::size_t, uint64_t>,
         std::variant<uint32_t, size_t, block_t>,
         iif<is_same_type<std::size_t, uint32_t>,
             std::variant<uint64_t, size_t, block_t>,
                 std::variant<uint64_t, uint32_t, size_t, block_t>>>;
-
+////using xevent_value =
+////    iif<is_same_type<std::size_t, uint64_t>,
+////        std::variant<uint32_t, size_t, xblock_t>,
+////        iif<is_same_type<std::size_t, uint32_t>,
+////            std::variant<uint64_t, size_t, xblock_t>,
+////                std::variant<uint64_t, uint32_t, size_t, xblock_t>>>;
+
+/// Event desubscriber.
 typedef network::desubscriber<object_key, chase, event_value> event_subscriber;
+////typedef network::desubscriber<object_key, chase, xevent_value> xevent_subscriber;
 typedef event_subscriber::handler event_notifier;
 typedef event_subscriber::completer event_completer;
 
@@ -100,6 +108,7 @@ typedef event_subscriber::completer event_completer;
 ////static_assert(sizeof(block_t) == 16u);
 ////static_assert(sizeof(xblock_t) == 32u);
 ////static_assert(sizeof(event_value) == 24u);
+////static_assert(sizeof(xevent_value) == 40u);
 
 } // namespace node
 } // namespace libbitcoin