Rewrite optimistic scheduler in terms of ledger_view and add ledger v…

…iew height(account) overload.

nano/core_test/backlog.cpp

@@ -21,7 +21,7 @@ TEST (backlog, population)
 	nano::test::system system{};
 	auto & node = *system.add_node ();
 
-	node.backlog.activate_callback.add ([&] (nano::store::transaction const & transaction, nano::account const & account, nano::account_info const & account_info, nano::confirmation_height_info const & conf_info) {
+	node.backlog.activate_callback.add ([&] (nano::store::transaction const & transaction, nano::account const & account) {
 		nano::lock_guard<nano::mutex> lock{ mutex };
 
 		activated.insert (account);

nano/node/backlog_population.cpp

@@ -134,6 +134,6 @@ void nano::backlog_population::activate (store::transaction const & transaction,
 	{
 		stats.inc (nano::stat::type::backlog, nano::stat::detail::activated);
 
-		activate_callback.notify (transaction, account, account_info, conf_info);
+		activate_callback.notify (transaction, account);
 	}
 }

nano/node/backlog_population.hpp

@@ -50,7 +50,7 @@ class backlog_population final
 	/**
 	 * Callback called for each backlogged account
 	 */
-	using callback_t = nano::observer_set<store::transaction const &, nano::account const &, nano::account_info const &, nano::confirmation_height_info const &>;
+	using callback_t = nano::observer_set<store::transaction const &, nano::account const &>;
 	callback_t activate_callback;
 
 private: // Dependencies

nano/node/node.cpp

@@ -216,9 +216,9 @@ nano::node::node (std::shared_ptr<boost::asio::io_context> io_ctx_a, std::filesy
 		return ledger.weight (rep);
 	};
 
-	backlog.activate_callback.add ([this] (store::transaction const & transaction, nano::account const & account, nano::account_info const & account_info, nano::confirmation_height_info const & conf_info) {
+	backlog.activate_callback.add ([this] (store::transaction const & transaction, nano::account const & account) {
 		scheduler.priority.activate (account, transaction);
-		scheduler.optimistic.activate (account, account_info, conf_info);
+		scheduler.optimistic.activate (transaction, account);
 	});
 
 	active.vote_processed.add ([this] (std::shared_ptr<nano::vote> const & vote, nano::vote_source source, std::unordered_map<nano::block_hash, nano::vote_code> const & results) {

nano/node/scheduler/optimistic.cpp

@@ -55,30 +55,31 @@ void nano::scheduler::optimistic::notify ()
 	condition.notify_all ();
 }
 
-bool nano::scheduler::optimistic::activate_predicate (const nano::account_info & account_info, const nano::confirmation_height_info & conf_info) const
+bool nano::scheduler::optimistic::activate_predicate (nano::store::transaction const & transaction, nano::account const & account) const
 {
-	// Chain with a big enough gap between account frontier and confirmation frontier
-	if (account_info.block_count - conf_info.height > config.gap_threshold)
+	auto unconfirmed_height = ledger->height (transaction, account);
+	auto confirmed_height = ledger.confirmed ().height (transaction, account);
+	// Account with nothing confirmed yet
+	if (confirmed_height == 0)
 	{
 		return true;
 	}
-	// Account with nothing confirmed yet
-	if (conf_info.height == 0)
+	// Chain with a big enough gap between account frontier and confirmation frontier
+	if (unconfirmed_height - confirmed_height > config.gap_threshold)
 	{
 		return true;
 	}
 	return false;
 }
 
-bool nano::scheduler::optimistic::activate (const nano::account & account, const nano::account_info & account_info, const nano::confirmation_height_info & conf_info)
+bool nano::scheduler::optimistic::activate (nano::store::transaction const & transaction, nano::account const & account)
 {
 	if (!config.enabled)
 	{
 		return false;
 	}
 
-	debug_assert (account_info.block_count >= conf_info.height);
-	if (activate_predicate (account_info, conf_info))
+	if (activate_predicate (transaction, account))
 	{
 		{
 			nano::lock_guard<nano::mutex> lock{ mutex };

nano/node/scheduler/optimistic.hpp

@@ -25,6 +25,7 @@ namespace nano
 class account_info;
 class active_transactions;
 class ledger;
+class ledger_view;
 class node;
 }
 
@@ -60,7 +61,7 @@ class optimistic final
 	/**
 	 * Called from backlog population to process accounts with unconfirmed blocks
 	 */
-	bool activate (nano::account const &, nano::account_info const &, nano::confirmation_height_info const &);
+	bool activate (nano::store::transaction const & transaction, nano::account const & account);
 
 	/**
 	 * Notify about changes in AEC vacancy
@@ -70,7 +71,7 @@ class optimistic final
 	std::unique_ptr<container_info_component> collect_container_info (std::string const & name) const;
 
 private:
-	bool activate_predicate (nano::account_info const &, nano::confirmation_height_info const &) const;
+	bool activate_predicate (nano::store::transaction const & transaction, nano::account const & account) const;
 
 	bool predicate () const;
 	void run ();