Move block successors to their own table.

nano/core_test/block_store.cpp

@@ -83,7 +83,6 @@ TEST (block_store, sideband_serialization)
 	sideband1.account = 1;
 	sideband1.balance = 2;
 	sideband1.height = 3;
-	sideband1.successor = 4;
 	sideband1.timestamp = 5;
 	std::vector<uint8_t> vector;
 	{
@@ -96,7 +95,6 @@ TEST (block_store, sideband_serialization)
 	ASSERT_EQ (sideband1.account, sideband2.account);
 	ASSERT_EQ (sideband1.balance, sideband2.balance);
 	ASSERT_EQ (sideband1.height, sideband2.height);
-	ASSERT_EQ (sideband1.successor, sideband2.successor);
 	ASSERT_EQ (sideband1.timestamp, sideband2.timestamp);
 }
 
@@ -135,47 +133,14 @@ TEST (block_store, clear_successor)
 {
 	nano::logger logger;
 	auto store = nano::make_store (logger, nano::unique_path (), nano::dev::constants);
-	ASSERT_TRUE (!store->init_error ());
-	nano::block_builder builder;
-	auto block1 = builder
-				  .open ()
-				  .source (0)
-				  .representative (1)
-				  .account (0)
-				  .sign (nano::keypair ().prv, 0)
-				  .work (0)
-				  .build ();
-	block1->sideband_set ({});
-	auto transaction (store->tx_begin_write ());
-	store->block.put (transaction, block1->hash (), *block1);
-	auto block2 = builder
-				  .open ()
-				  .source (0)
-				  .representative (2)
-				  .account (0)
-				  .sign (nano::keypair ().prv, 0)
-				  .work (0)
-				  .build ();
-	block2->sideband_set ({});
-	store->block.put (transaction, block2->hash (), *block2);
-	auto block2_store (store->block.get (transaction, block1->hash ()));
-	ASSERT_NE (nullptr, block2_store);
-	ASSERT_EQ (0, block2_store->sideband ().successor.number ());
-	auto modified_sideband = block2_store->sideband ();
-	modified_sideband.successor = block2->hash ();
-	block1->sideband_set (modified_sideband);
-	store->block.put (transaction, block1->hash (), *block1);
-	{
-		auto block1_store (store->block.get (transaction, block1->hash ()));
-		ASSERT_NE (nullptr, block1_store);
-		ASSERT_EQ (block2->hash (), block1_store->sideband ().successor);
-	}
-	store->block.successor_clear (transaction, block1->hash ());
-	{
-		auto block1_store (store->block.get (transaction, block1->hash ()));
-		ASSERT_NE (nullptr, block1_store);
-		ASSERT_EQ (0, block1_store->sideband ().successor.number ());
-	}
+	nano::block_hash one{ 1 };
+	nano::block_hash two{ 2 };
+	auto tx = store->tx_begin_write ();
+	ASSERT_EQ (0, store->successor.get (tx, one));
+	store->successor.put (tx, one, two);
+	ASSERT_EQ (two, store->successor.get (tx, one));
+	store->successor.del (tx, one);
+	ASSERT_EQ (0, store->successor.get (tx, one));
 }
 
 TEST (block_store, add_nonempty_block)

nano/core_test/ledger.cpp

@@ -267,7 +267,7 @@ TEST (ledger, process_receive)
 	ASSERT_EQ (nano::dev::constants.genesis_amount - 25, ledger.account_balance (transaction, key2.pub));
 	ASSERT_EQ (nano::dev::constants.genesis_amount - 25, ledger.weight (key3.pub));
 	ASSERT_FALSE (ledger.rollback (transaction, hash4));
-	ASSERT_TRUE (store.block.successor (transaction, hash2).is_zero ());
+	ASSERT_TRUE (store.successor.get (transaction, hash2).is_zero ());
 	ASSERT_EQ (key2.pub, store.frontier.get (transaction, hash2));
 	ASSERT_TRUE (store.frontier.get (transaction, hash4).is_zero ());
 	ASSERT_EQ (25, ledger.account_balance (transaction, nano::dev::genesis_key.pub));
@@ -3157,7 +3157,7 @@ TEST (ledger, state_rollback_send)
 	ASSERT_EQ (nano::dev::constants.genesis_amount, ledger.account_balance (transaction, nano::dev::genesis->account ()));
 	ASSERT_EQ (nano::dev::constants.genesis_amount, ledger.weight (nano::dev::genesis->account ()));
 	ASSERT_FALSE (store.pending.exists (transaction, nano::pending_key (nano::dev::genesis->account (), send1->hash ())));
-	ASSERT_TRUE (store.block.successor (transaction, nano::dev::genesis->hash ()).is_zero ());
+	ASSERT_TRUE (store.successor.get (transaction, nano::dev::genesis->hash ()).is_zero ());
 	ASSERT_EQ (store.account.count (transaction), ledger.cache.account_count);
 }
 

nano/lib/blocks.cpp

@@ -1861,12 +1861,7 @@ std::string nano::state_subtype (nano::block_details const details_a)
 	}
 }
 
-/*
- * block_sideband
- */
-
-nano::block_sideband::block_sideband (nano::account const & account_a, nano::block_hash const & successor_a, nano::amount const & balance_a, uint64_t const height_a, nano::seconds_t const timestamp_a, nano::block_details const & details_a, nano::epoch const source_epoch_a) :
-	successor (successor_a),
+nano::block_sideband::block_sideband (nano::account const & account_a, nano::amount const & balance_a, uint64_t const height_a, nano::seconds_t const timestamp_a, nano::block_details const & details_a, nano::epoch const source_epoch_a) :
 	account (account_a),
 	balance (balance_a),
 	height (height_a),
@@ -1876,8 +1871,7 @@ nano::block_sideband::block_sideband (nano::account const & account_a, nano::blo
 {
 }
 
-nano::block_sideband::block_sideband (nano::account const & account_a, nano::block_hash const & successor_a, nano::amount const & balance_a, uint64_t const height_a, nano::seconds_t const timestamp_a, nano::epoch const epoch_a, bool const is_send, bool const is_receive, bool const is_epoch, nano::epoch const source_epoch_a) :
-	successor (successor_a),
+nano::block_sideband::block_sideband (nano::account const & account_a, nano::amount const & balance_a, uint64_t const height_a, nano::seconds_t const timestamp_a, nano::epoch const epoch_a, bool const is_send, bool const is_receive, bool const is_epoch, nano::epoch const source_epoch_a) :
 	account (account_a),
 	balance (balance_a),
 	height (height_a),
@@ -1890,7 +1884,6 @@ nano::block_sideband::block_sideband (nano::account const & account_a, nano::blo
 size_t nano::block_sideband::size (nano::block_type type_a)
 {
 	size_t result (0);
-	result += sizeof (successor);
 	if (type_a != nano::block_type::state && type_a != nano::block_type::open)
 	{
 		result += sizeof (account);
@@ -1914,7 +1907,6 @@ size_t nano::block_sideband::size (nano::block_type type_a)
 
 void nano::block_sideband::serialize (nano::stream & stream_a, nano::block_type type_a) const
 {
-	nano::write (stream_a, successor.bytes);
 	if (type_a != nano::block_type::state && type_a != nano::block_type::open)
 	{
 		nano::write (stream_a, account.bytes);
@@ -1940,7 +1932,6 @@ bool nano::block_sideband::deserialize (nano::stream & stream_a, nano::block_typ
 	bool result (false);
 	try
 	{
-		nano::read (stream_a, successor.bytes);
 		if (type_a != nano::block_type::state && type_a != nano::block_type::open)
 		{
 			nano::read (stream_a, account.bytes);
@@ -1978,7 +1969,6 @@ bool nano::block_sideband::deserialize (nano::stream & stream_a, nano::block_typ
 
 void nano::block_sideband::operator() (nano::object_stream & obs) const
 {
-	obs.write ("successor", successor);
 	obs.write ("account", account);
 	obs.write ("balance", balance);
 	obs.write ("height", height);

nano/lib/blocks.hpp

@@ -68,12 +68,11 @@ class block_sideband final
 {
 public:
 	block_sideband () = default;
-	block_sideband (nano::account const &, nano::block_hash const &, nano::amount const &, uint64_t const, nano::seconds_t const local_timestamp, nano::block_details const &, nano::epoch const source_epoch_a);
-	block_sideband (nano::account const &, nano::block_hash const &, nano::amount const &, uint64_t const, nano::seconds_t const local_timestamp, nano::epoch const epoch_a, bool const is_send, bool const is_receive, bool const is_epoch, nano::epoch const source_epoch_a);
+	block_sideband (nano::account const &, nano::amount const &, uint64_t const, nano::seconds_t const local_timestamp, nano::block_details const &, nano::epoch const source_epoch_a);
+	block_sideband (nano::account const &, nano::amount const &, uint64_t const, nano::seconds_t const local_timestamp, nano::epoch const epoch_a, bool const is_send, bool const is_receive, bool const is_epoch, nano::epoch const source_epoch_a);
 	void serialize (nano::stream &, nano::block_type) const;
 	bool deserialize (nano::stream &, nano::block_type);
 	static size_t size (nano::block_type);
-	nano::block_hash successor{ 0 };
 	nano::account account{};
 	nano::amount balance{ 0 };
 	uint64_t height{ 0 };

nano/nano_node/entry.cpp

@@ -1583,7 +1583,7 @@ int main (int argc, char * const * argv)
 						calculated_representative = block->representative ();
 					}
 					// Retrieving successor block hash
-					hash = node->store.block.successor (transaction, hash);
+					hash = node->store.successor.get (transaction, hash);
 					// Retrieving block data
 					if (!hash.is_zero ())
 					{

nano/node/blockprocessor.cpp

@@ -262,7 +262,7 @@ auto nano::block_processor::process_batch (nano::unique_lock<nano::mutex> & lock
 	processed_batch_t processed;
 
 	auto scoped_write_guard = write_database_queue.wait (nano::writer::process_batch);
-	auto transaction (node.store.tx_begin_write ({ tables::accounts, tables::blocks, tables::frontiers, tables::pending }));
+	auto transaction (node.store.tx_begin_write ({ tables::accounts, tables::blocks, tables::frontiers, tables::pending, tables::successor }));
 	nano::timer<std::chrono::milliseconds> timer_l;
 
 	lock_a.lock ();

nano/node/bootstrap/bootstrap_bulk_pull.cpp

@@ -374,7 +374,7 @@ void nano::bulk_pull_server::set_current_end ()
 	{
 		node->logger.debug (nano::log::type::bulk_pull_server, "Bulk pull request for block hash: {}", request->start.to_string ());
 
-		current = ascending () ? node->store.block.successor (transaction, request->start.as_block_hash ()) : request->start.as_block_hash ();
+		current = ascending () ? node->store.successor.get (transaction, request->start.as_block_hash ()) : request->start.as_block_hash ();
 		include_start = true;
 	}
 	else
@@ -492,7 +492,7 @@ std::shared_ptr<nano::block> nano::bulk_pull_server::get_next ()
 		result = node->block (current);
 		if (result != nullptr && set_current_to_end == false)
 		{
-			auto next = ascending () ? result->sideband ().successor : result->previous ();
+			auto next = ascending () ? node->successor (current) : result->previous ();
 			if (!next.is_zero ())
 			{
 				current = next;

nano/node/bootstrap/bootstrap_server.cpp

@@ -7,6 +7,7 @@
 #include <nano/store/block.hpp>
 #include <nano/store/component.hpp>
 #include <nano/store/confirmation_height.hpp>
+#include <nano/store/successor.hpp>
 
 // TODO: Make threads configurable
 nano::bootstrap_server::bootstrap_server (nano::store::component & store_a, nano::ledger & ledger_a, nano::network_constants const & network_constants_a, nano::stats & stats_a) :
@@ -257,9 +258,7 @@ std::vector<std::shared_ptr<nano::block>> nano::bootstrap_server::prepare_blocks
 		while (current && result.size () < count)
 		{
 			result.push_back (current);
-
-			auto successor = current->sideband ().successor;
-			current = store.block.get (transaction, successor);
+			current = store.block.get (transaction, store.successor.get (transaction, current->hash ()));
 		}
 	}
 	return result;

nano/node/confirmation_height_bounded.cpp

@@ -5,6 +5,7 @@
 #include <nano/store/block.hpp>
 #include <nano/store/confirmation_height.hpp>
 #include <nano/store/pruned.hpp>
+#include <nano/store/successor.hpp>
 
 #include <boost/format.hpp>
 
@@ -229,7 +230,7 @@ nano::block_hash nano::confirmation_height_bounded::get_least_unconfirmed_hash_f
 		{
 			auto block (ledger.store.block.get (transaction_a, confirmation_height_info_a.frontier));
 			release_assert (block != nullptr);
-			least_unconfirmed_hash = block->sideband ().successor;
+			least_unconfirmed_hash = ledger.store.successor.get (transaction_a, confirmation_height_info_a.frontier);
 			block_height_a = block->sideband ().height + 1;
 		}
 	}
@@ -256,6 +257,7 @@ bool nano::confirmation_height_bounded::iterate (store::read_transaction const &
 		// Once a receive is cemented, we can cement all blocks above it until the next receive, so store those details for later.
 		++num_blocks;
 		auto block = ledger.store.block.get (transaction_a, hash);
+		auto successor = ledger.store.successor.get (transaction_a, hash);
 		auto source (block->source ());
 		if (source.is_zero ())
 		{
@@ -266,9 +268,8 @@ bool nano::confirmation_height_bounded::iterate (store::read_transaction const &
 		{
 			hit_receive = true;
 			reached_target = true;
-			auto const & sideband (block->sideband ());
-			auto next = !sideband.successor.is_zero () && sideband.successor != top_level_hash_a ? boost::optional<nano::block_hash> (sideband.successor) : boost::none;
-			receive_source_pairs_a.push_back ({ receive_chain_details{ account_a, sideband.height, hash, top_level_hash_a, next, bottom_height_a, bottom_hash_a }, source });
+			auto next = !successor.is_zero () && successor != top_level_hash_a ? boost::optional<nano::block_hash> (successor) : boost::none;
+			receive_source_pairs_a.push_back ({ receive_chain_details{ account_a, block->sideband ().height, hash, top_level_hash_a, next, bottom_height_a, bottom_hash_a }, source });
 			// Store a checkpoint every max_items so that we can always traverse a long number of accounts to genesis
 			if (receive_source_pairs_a.size () % max_items == 0)
 			{
@@ -285,7 +286,7 @@ bool nano::confirmation_height_bounded::iterate (store::read_transaction const &
 			}
 			else
 			{
-				hash = block->sideband ().successor;
+				hash = successor;
 			}
 		}
 
@@ -415,7 +416,7 @@ void nano::confirmation_height_bounded::cement_blocks (nano::write_guard & scope
 				else
 				{
 					auto block = ledger.store.block.get (transaction, confirmation_height_info.frontier);
-					new_cemented_frontier = block->sideband ().successor;
+					new_cemented_frontier = ledger.store.successor.get (transaction, confirmation_height_info.frontier);
 					num_blocks_confirmed = pending.top_height - confirmation_height_info.height;
 					start_height = confirmation_height_info.height + 1;
 				}
@@ -479,7 +480,7 @@ void nano::confirmation_height_bounded::cement_blocks (nano::write_guard & scope
 					// Get the next block in the chain until we have reached the final desired one
 					if (!last_iteration)
 					{
-						new_cemented_frontier = block->sideband ().successor;
+						new_cemented_frontier = ledger.store.successor.get (transaction, new_cemented_frontier);
 						block = ledger.store.block.get (transaction, new_cemented_frontier);
 					}
 					else

nano/node/json_handler.cpp

@@ -1160,7 +1160,7 @@ void nano::json_handler::block_info ()
 			response_l.put ("balance", balance.convert_to<std::string> ());
 			response_l.put ("height", std::to_string (block->sideband ().height));
 			response_l.put ("local_timestamp", std::to_string (block->sideband ().timestamp));
-			response_l.put ("successor", block->sideband ().successor.to_string ());
+			response_l.put ("successor", node.store.successor.get (transaction, hash).to_string ());
 			auto confirmed (node.ledger.block_confirmed (transaction, hash));
 			response_l.put ("confirmed", confirmed);
 
@@ -1319,7 +1319,7 @@ void nano::json_handler::blocks_info ()
 					entry.put ("balance", balance.convert_to<std::string> ());
 					entry.put ("height", std::to_string (block->sideband ().height));
 					entry.put ("local_timestamp", std::to_string (block->sideband ().timestamp));
-					entry.put ("successor", block->sideband ().successor.to_string ());
+					entry.put ("successor", node.store.successor.get (transaction, hash).to_string ());
 					auto confirmed (node.ledger.block_confirmed (transaction, hash));
 					entry.put ("confirmed", confirmed);
 
@@ -1958,7 +1958,7 @@ void nano::json_handler::chain (bool successors)
 					entry.put ("", hash.to_string ());
 					blocks.push_back (std::make_pair ("", entry));
 				}
-				hash = successors ? node.store.block.successor (transaction, hash) : block_l->previous ();
+				hash = successors ? node.store.successor.get (transaction, hash) : block_l->previous ();
 			}
 			else
 			{
@@ -2670,7 +2670,7 @@ void nano::json_handler::account_history ()
 					--count;
 				}
 			}
-			hash = reverse ? node.store.block.successor (transaction, hash) : block->previous ();
+			hash = reverse ? node.store.successor.get (transaction, hash) : block->previous ();
 			block = node.store.block.get (transaction, hash);
 		}
 		response_l.add_child ("history", history);
@@ -3705,7 +3705,7 @@ void nano::json_handler::republish ()
 						}
 					}
 				}
-				hash = node.store.block.successor (transaction, hash);
+				hash = node.store.successor.get (transaction, hash);
 			}
 			node.network.flood_block_many (std::move (republish_bundle), nullptr, 25);
 			response_l.put ("success", ""); // obsolete

nano/node/node.cpp

@@ -566,7 +566,7 @@ void nano::node::process_active (std::shared_ptr<nano::block> const & incoming)
 
 nano::process_return nano::node::process (nano::block & block)
 {
-	auto const transaction = store.tx_begin_write ({ tables::accounts, tables::blocks, tables::frontiers, tables::pending });
+	auto const transaction = store.tx_begin_write ({ tables::accounts, tables::blocks, tables::frontiers, tables::pending, tables::successor });
 	return process (transaction, block);
 }
 
@@ -730,6 +730,12 @@ std::shared_ptr<nano::block> nano::node::block (nano::block_hash const & hash_a)
 	return store.block.get (transaction, hash_a);
 }
 
+nano::block_hash nano::node::successor (nano::block_hash const & hash)
+{
+	auto tx = store.tx_begin_read ();
+	return store.successor.get (tx, hash);
+}
+
 std::pair<nano::uint128_t, nano::uint128_t> nano::node::balance_pending (nano::account const & account_a, bool only_confirmed_a)
 {
 	std::pair<nano::uint128_t, nano::uint128_t> result;

nano/node/node.hpp

@@ -90,6 +90,7 @@ class node final : public std::enable_shared_from_this<nano::node>
 	void process_local_async (std::shared_ptr<nano::block> const &);
 	void keepalive_preconfigured (std::vector<std::string> const &);
 	std::shared_ptr<nano::block> block (nano::block_hash const &);
+	nano::block_hash successor (nano::block_hash const & hash);
 	std::pair<nano::uint128_t, nano::uint128_t> balance_pending (nano::account const &, bool only_confirmed);
 	nano::uint128_t weight (nano::account const &);
 	nano::block_hash rep_block (nano::account const &);

nano/node/request_aggregator.cpp

@@ -237,7 +237,7 @@ std::pair<std::vector<std::shared_ptr<nano::block>>, std::vector<std::shared_ptr
 			if (block == nullptr && !root.is_zero ())
 			{
 				// Search for block root
-				auto successor (ledger.store.block.successor (transaction, root.as_block_hash ()));
+				auto successor (ledger.store.successor.get (transaction, root.as_block_hash ()));
 
 				// Search for account root
 				if (successor.is_zero ())

nano/node/scheduler/priority.cpp

@@ -46,7 +46,7 @@ bool nano::scheduler::priority::activate (nano::account const & account_a, store
 		if (conf_info.height < info->block_count)
 		{
 			debug_assert (conf_info.frontier != info->head);
-			auto hash = conf_info.height == 0 ? info->open_block : node.store.block.successor (transaction, conf_info.frontier);
+			auto hash = conf_info.height == 0 ? info->open_block : node.store.successor.get (transaction, conf_info.frontier);
 			auto block = node.store.block.get (transaction, hash);
 			debug_assert (block != nullptr);
 			if (node.ledger.dependents_confirmed (transaction, *block))

nano/qt/qt.cpp

@@ -677,7 +677,7 @@ nano_qt::block_viewer::block_viewer (nano_qt::wallet & wallet_a) :
 				std::string contents;
 				block_l->serialize_json (contents);
 				block->setPlainText (contents.c_str ());
-				auto successor_l (this->wallet.node.store.block.successor (transaction, hash_l));
+				auto successor_l (this->wallet.node.store.successor.get (transaction, hash_l));
 				successor->setText (successor_l.to_string ().c_str ());
 			}
 			else
@@ -721,7 +721,7 @@ void nano_qt::block_viewer::rebroadcast_action (nano::block_hash const & hash_a)
 	if (block != nullptr)
 	{
 		wallet.node.network.flood_block (block);
-		auto successor (wallet.node.store.block.successor (transaction, hash_a));
+		auto successor (wallet.node.store.successor.get (transaction, hash_a));
 		if (!successor.is_zero ())
 		{
 			done = false;