Add ledger::force

Author: clemahieu

nano/node/election.cpp

@@ -393,7 +393,7 @@ void nano::election::confirm_if_quorum (nano::unique_lock<nano::mutex> & lock_a)
 	{
 		status.winner = block_l;
 		remove_votes (status_winner_hash_l);
-		node.block_processor.force (block_l);
+		node.ledger.force (node.store.tx_begin_write (), block_l);
 	}
 	if (have_quorum (tally_l))
 	{

nano/secure/ledger.cpp

@@ -1382,6 +1382,10 @@ nano::epoch nano::ledger::version (store::transaction const & transaction, nano:
 
 void nano::ledger::confirm (nano::store::write_transaction const & transaction, nano::block_hash const & hash)
 {
+	if (confirmed (transaction, hash))
+	{
+		return;
+	}
 	auto view = unconfirmed (transaction);
 	debug_assert (unconfirmed_set.block.count (hash) == 1);
 	std::deque<nano::block_hash> queue;
@@ -1506,6 +1510,20 @@ void nano::ledger::confirm (nano::store::write_transaction const & transaction,
 	store.account.put (transaction, account_l, account_info (view, block, representative));
 }
 
+void nano::ledger::force (nano::store::write_transaction const & transaction, std::shared_ptr<nano::block> block)
+{
+	auto view = unconfirmed (transaction);
+	if (view.exists (block->hash ()))
+	{
+		return;
+	}
+	auto successor = view.successor (block->previous ());
+	release_assert (successor);
+	auto error = rollback (transaction, successor.value ());
+	release_assert (!error);
+	process (transaction, block);
+}
+
 std::unique_ptr<nano::container_info_component> nano::collect_container_info (ledger & ledger, std::string const & name)
 {
 	auto count = ledger.bootstrap_weights.size ();

nano/secure/ledger.hpp

@@ -75,6 +75,7 @@ class ledger final
 	nano::epoch version (store::transaction const & transaction, nano::block_hash const & hash) const;
 	void confirm (nano::store::write_transaction const & transaction, nano::block_hash const & hash);
 	nano::account_info account_info (nano::ledger_view & view, nano::block const & block, nano::account const & representative);
+	void force (nano::store::write_transaction const & transaction, std::shared_ptr<nano::block> block);
 	static nano::uint128_t const unit;
 	nano::ledger_constants & constants;
 	nano::store::component & store;