Incorporate new validation/confirmation settings, clean up

.vscode/settings.json

@@ -1,10 +1,4 @@
 {
-<<<<<<< HEAD
-    "cmake.sourceDirectory": "/home/nixmini/Repository/Source/libbitcoin-node/builds/cmake",
-    "cmake.useCMakePresets": "always"
-}
-=======
     "cmake.sourceDirectory": "${workspaceFolder}/builds/cmake",
     "cmake.useCMakePresets": "always"
 }
->>>>>>> e3e1a43d (Regenerate artifacts.)

builds/vscode/node.code-workspace

@@ -1,5 +1,4 @@
 {
-<<<<<<< HEAD
 	"folders": [
 		{
 			"path": "../../../libbitcoin-system"
@@ -13,14 +12,6 @@
 		{
 			"path": "../../../libbitcoin-node"
 		}
-	],
-	"settings": {}
-=======
-    "folders": [
-        {
-	    "path": "../../../libbitcoin-node"
-	}
     ],
     "settings": {}
->>>>>>> e3e1a43d (Regenerate artifacts.)
 }

include/bitcoin/node/chasers/chaser.hpp

@@ -43,6 +43,12 @@ class BCN_API chaser
 
     /// Should be called from node strand.
     virtual code start() NOEXCEPT = 0;
+
+    /// Override to capture non-blocking stopping.
+    virtual void stopping(const code& ec) NOEXCEPT;
+
+    /// Override to capture blocking stop.
+    virtual void stop() NOEXCEPT;
 
 protected:
     /// Abstract base class protected construct.
@@ -68,10 +74,6 @@ class BCN_API chaser
     /// Methods.
     /// -----------------------------------------------------------------------
 
-    /// Override to capture node stopping, allow full_node to invoke.
-    friend full_node;
-    virtual void stopping(const code& ec) NOEXCEPT;
-
     /// Node threadpool is stopped and may still be joining.
     virtual bool closed() const NOEXCEPT;
 

include/bitcoin/node/chasers/chaser_confirm.hpp

@@ -40,6 +40,8 @@ class BCN_API chaser_confirm
     chaser_confirm(full_node& node) NOEXCEPT;
 
     code start() NOEXCEPT override;
+    void stopping(const code& ec) NOEXCEPT override;
+    void stop() NOEXCEPT override;
 
 protected:
     using header_links = std_vector<database::header_link>;
@@ -51,7 +53,8 @@ class BCN_API chaser_confirm
     virtual void do_validated(height_t height) NOEXCEPT;
     virtual void do_reorganize(size_t height) NOEXCEPT;
     virtual void do_organize(size_t height) NOEXCEPT;
-    virtual bool enqueue_block(const database::header_link& link) NOEXCEPT;
+
+    virtual void enqueue_block(const database::header_link& link) NOEXCEPT;
     virtual void confirm_tx(const database::context& ctx,
         const database::tx_link& link, const race::ptr& racer) NOEXCEPT;
     virtual void handle_tx(const code& ec, const database::tx_link& tx,
@@ -82,6 +85,9 @@ class BCN_API chaser_confirm
     bool get_is_strong(bool& strong, const uint256_t& fork_work,
         size_t fork_point) const NOEXCEPT;
 
+    // This is thread safe.
+    const bool concurrent_;
+
     // These are protected by strand.
     network::threadpool threadpool_;
     header_links popped_{};

include/bitcoin/node/chasers/chaser_snapshot.hpp

@@ -40,26 +40,31 @@ class BCN_API chaser_snapshot
     code start() NOEXCEPT override;
 
 protected:
-    virtual void do_confirm(height_t height) NOEXCEPT;
     virtual void do_archive(height_t height) NOEXCEPT;
+    virtual void do_valid(height_t height) NOEXCEPT;
+    virtual void do_confirm(height_t height) NOEXCEPT;
     virtual bool handle_event(const code& ec, chase event_,
         event_value value) NOEXCEPT;
 
 private:
     bool update_bytes() NOEXCEPT;
     bool update_valid(height_t height) NOEXCEPT;
+    bool update_confirm(height_t height) NOEXCEPT;
     void do_snapshot(height_t height) NOEXCEPT;
 
     // These are thread safe.
     const size_t top_checkpoint_;
-    const size_t snapshot_valid_;
     const uint64_t snapshot_bytes_;
-    const bool enabled_valid_;
+    const size_t snapshot_valid_;
+    const size_t snapshot_confirm_;
     const bool enabled_bytes_;
+    const bool enabled_valid_;
+    const bool enabled_confirm_;
 
     // These are protected by strand.
     uint64_t bytes_{};
     size_t valid_{};
+    size_t confirm_{};
 };
 
 } // namespace node

include/bitcoin/node/chasers/chaser_validate.hpp

@@ -39,35 +39,22 @@ class BCN_API chaser_validate
     chaser_validate(full_node& node) NOEXCEPT;
 
     code start() NOEXCEPT override;
-
-    /// Validate a populated candidate block.
-    virtual void validate(const system::chain::block::cptr& block,
-        const database::header_link& link, size_t height) NOEXCEPT;
+    void stopping(const code& ec) NOEXCEPT override;
+    void stop() NOEXCEPT override;
 
 protected:
     typedef network::race_unity<const code&, const database::tx_link&> race;
 
     virtual bool handle_event(const code& ec, chase event_,
         event_value value) NOEXCEPT;
 
-    virtual void do_validate(const system::chain::block::cptr& block,
-        database::header_link::integer link, size_t height) NOEXCEPT;
-
     virtual void do_regressed(height_t branch_point) NOEXCEPT;
     virtual void do_checked(height_t height) NOEXCEPT;
     virtual void do_bump(height_t height) NOEXCEPT;
 
-    virtual bool enqueue_block(const database::header_link& link) NOEXCEPT;
-    virtual void validate_tx(const database::context& ctx,
-        const database::tx_link& link, const race::ptr& racer) NOEXCEPT;
-    virtual void handle_tx(const code& ec, const database::tx_link& tx,
-        const race::ptr& racer) NOEXCEPT;
-    virtual void handle_txs(const code& ec, const database::tx_link& tx,
-        const database::header_link& link,
-        const database::context& ctx) NOEXCEPT;
-    virtual void validate_block(const code& ec,
-        const database::header_link& link,
-        const database::context& ctx) NOEXCEPT;
+    virtual void validate_block(const database::header_link& link) NOEXCEPT;
+    virtual void complete_block(const code& ec,
+        const database::header_link& link, size_t height) NOEXCEPT;
 
 private:
     // neutrino
@@ -78,12 +65,16 @@ class BCN_API chaser_validate
         const system::chain::block& block) NOEXCEPT;
 
     // These are thread safe.
+    const bool prepopulate_;
+    const bool concurrent_;
+    const size_t maximum_backlog_;
     const uint64_t initial_subsidy_;
-    const uint32_t subsidy_interval_blocks_;
+    const uint32_t subsidy_interval_;
 
     // These are protected by strand.
     network::threadpool threadpool_;
     system::hash_digest neutrino_{};
+    size_t validation_backlog_{};
 };
 
 } // namespace node

include/bitcoin/node/impl/chasers/chaser_organize.ipp

@@ -89,6 +89,11 @@ bool CLASS::handle_event(const code&, chase event_, event_value value) NOEXCEPT
     if (closed())
         return false;
 
+    // TODO: allow required messages.
+    ////// Stop generating query during suspension.
+    ////if (suspended())
+    ////    return true;
+
     switch (event_)
     {
         case chase::unchecked:
@@ -195,7 +200,7 @@ void CLASS::do_organize(typename Block::cptr block,
     bool strong{};
     uint256_t work{};
     hashes tree_branch{};
-    size_t branch_point{};
+    height_t branch_point{};
     header_links store_branch{};
 
     if (!get_branch_work(work, branch_point, tree_branch, store_branch, header))

include/bitcoin/node/settings.hpp

@@ -73,15 +73,20 @@ class BCN_API settings
 
     /// Properties.
     bool headers_first;
+    bool priority_validation;
+    bool concurrent_validation;
+    bool concurrent_confirmation;
     float allowed_deviation;
     uint16_t allocation_multiple;
     uint64_t snapshot_bytes;
     uint32_t snapshot_valid;
+    uint32_t snapshot_confirm;
     uint32_t maximum_height;
     uint32_t maximum_concurrency;
     uint16_t sample_period_seconds;
     uint32_t currency_window_minutes;
     uint32_t threads;
+    bool prepopulate;
 
     /// Helpers.
     virtual size_t maximum_height_() const NOEXCEPT;

src/chasers/chaser.cpp

@@ -47,6 +47,10 @@ void chaser::stopping(const code&) NOEXCEPT
 {
 }
 
+void chaser::stop() NOEXCEPT
+{
+}
+
 bool chaser::closed() const NOEXCEPT
 {
     return node_.closed();

src/chasers/chaser_check.cpp

@@ -95,6 +95,11 @@ bool chaser_check::handle_event(const code&, chase event_,
     if (closed())
         return false;
 
+    // TODO: allow required messages.
+    ////// Stop generating query during suspension.
+    ////if (suspended())
+    ////    return true;
+
     switch (event_)
     {
         // Track downloaded.
@@ -365,14 +370,15 @@ size_t chaser_check::set_unassociated() NOEXCEPT
 size_t chaser_check::get_inventory_size() const NOEXCEPT
 {
     // Either condition means blocks shouldn't be getting downloaded (yet).
-    const auto peers = config().network.outbound_connections;
+    const size_t peers = config().network.outbound_connections;
     if (is_zero(peers) || !is_current())
         return zero;
 
     const auto& query = archive();
     const auto fork = query.get_fork();
-    const auto window = config().node.maximum_concurrency_();
-    const auto step = std::min(window, messages::max_inventory);
+
+    const auto span = system::ceilinged_multiply(messages::max_inventory, peers);
+    const auto step = std::min(maximum_concurrency_, span);
     const auto inventory = query.get_unassociated_count_above(fork, step);
     return system::ceilinged_divide(inventory, peers);
 }