Decent transaction import result provision.

Give network a hint about what's going on for peer backoffs.
Avoid sleeping in main loop when there's still work on.

eth/main.cpp

@@ -120,7 +120,7 @@ void help()
 		<< "    -j,--json-rpc  Enable JSON-RPC server (default: off)." << endl
 		<< "    --json-rpc-port	 Specify JSON-RPC server port (implies '-j', default: " << SensibleHttpPort << ")." << endl
 #endif
-		<< "    -K,--kill-blockchain  First kill the blockchain." << endl
+		<< "    -K,--kill  First kill the blockchain." << endl
 		<< "       --listen-ip <port>  Listen on the given port for incoming connections (default: 30303)." << endl
 		<< "    -l,--listen <ip>  Listen on the given IP for incoming connections (default: 0.0.0.0)." << endl
 		<< "    -u,--public-ip <ip>  Force public ip to given (default: auto)." << endl
@@ -129,7 +129,7 @@ void help()
 		<< "    -o,--mode <full/peer>  Start a full node or a peer node (Default: full)." << endl
 		<< "    -p,--port <port>  Connect to remote port (default: 30303)." << endl
 		<< "    -P,--priority <0 - 100>  Default % priority of a transaction (default: 50)." << endl
-		<< "    -R,--rebuild-blockchain  First rebuild the blockchain from the existing database." << endl
+		<< "    -R,--rebuild  First rebuild the blockchain from the existing database." << endl
 		<< "    -r,--remote <host>  Connect to remote host (default: none)." << endl
 		<< "    -s,--secret <secretkeyhex>  Set the secret key for use with send command (default: auto)." << endl
 		<< "    -t,--miners <number>  Number of mining threads to start (Default: " << thread::hardware_concurrency() << ")" << endl
@@ -274,9 +274,9 @@ int main(int argc, char** argv)
 				return -1;
 			}
 		}
-		else if (arg == "-K" || arg == "--kill-blockchain")
+		else if (arg == "-K" || arg == "--kill-blockchain" || arg == "--kill")
 			killChain = WithExisting::Kill;
-		else if (arg == "-B" || arg == "--rebuild-blockchain")
+		else if (arg == "-B" || arg == "--rebuild")
 			killChain = WithExisting::Verify;
 		else if ((arg == "-c" || arg == "--client-name") && i + 1 < argc)
 			clientName = argv[++i];

libethcore/Common.h

@@ -85,5 +85,15 @@ enum class RelativeBlock: BlockNumber
 	Pending = PendingBlock
 };
 
+enum class ImportResult
+{
+	Success = 0,
+	UnknownParent,
+	FutureTime,
+	AlreadyInChain,
+	AlreadyKnown,
+	Malformed
+};
+
 }
 }

libethereum/BlockChain.cpp

@@ -267,7 +267,7 @@ LastHashes BlockChain::lastHashes(unsigned _n) const
 	return m_lastLastHashes;
 }
 
-h256s BlockChain::sync(BlockQueue& _bq, OverlayDB const& _stateDB, unsigned _max)
+pair<h256s, bool> BlockChain::sync(BlockQueue& _bq, OverlayDB const& _stateDB, unsigned _max)
 {
 	_bq.tick(*this);
 
@@ -295,8 +295,8 @@ h256s BlockChain::sync(BlockQueue& _bq, OverlayDB const& _stateDB, unsigned _max
 		catch (...)
 		{}
 	}
-	_bq.doneDrain();
+	bool yetMore = _bq.doneDrain();
-	return ret;
+	return make_pair(ret, yetMore);
 }
 
 h256s BlockChain::attemptImport(bytes const& _block, OverlayDB const& _stateDB, bool _force) noexcept

libethereum/BlockChain.h

@@ -99,7 +99,7 @@ public:
 	void process();
 
 	/// Sync the chain with any incoming blocks. All blocks should, if processed in order
-	h256s sync(BlockQueue& _bq, OverlayDB const& _stateDB, unsigned _max);
+	std::pair<h256s, bool> sync(BlockQueue& _bq, OverlayDB const& _stateDB, unsigned _max);
 
 	/// Attempt to import the given block directly into the CanonBlockChain and sync with the state DB.
 	/// @returns the block hashes of any blocks that came into/went out of the canonical block chain.

libethereum/BlockQueue.h

@@ -26,6 +26,7 @@
 #include <libdevcore/Log.h>
 #include <libethcore/Common.h>
 #include <libdevcore/Guards.h>
+#include <libethcore/Common.h>
 
 namespace dev
 {
@@ -37,16 +38,6 @@ class BlockChain;
 struct BlockQueueChannel: public LogChannel { static const char* name() { return "[]Q"; } static const int verbosity = 4; };
 #define cblockq dev::LogOutputStream<dev::eth::BlockQueueChannel, true>()
 
-enum class ImportResult
-{
-	Success = 0,
-	UnknownParent,
-	FutureTime,
-	AlreadyInChain,
-	AlreadyKnown,
-	Malformed
-};
-
 /**
  * @brief A queue of blocks. Sits between network or other I/O and the BlockChain.
  * Sorts them ready for blockchain insertion (with the BlockChain::sync() method).
@@ -66,7 +57,8 @@ public:
 	void drain(std::vector<bytes>& o_out, unsigned _max);
 
 	/// Must be called after a drain() call. Notes that the drained blocks have been imported into the blockchain, so we can forget about them.
-	void doneDrain() { WriteGuard l(m_lock); m_drainingSet.clear(); }
+	/// @returns true iff there are additional blocks ready to be processed.
+	bool doneDrain() { WriteGuard l(m_lock); m_drainingSet.clear(); return !m_readySet.empty(); }
 
 	/// Notify the queue that the chain has changed and a new block has attained 'ready' status (i.e. is in the chain).
 	void noteReady(h256 _b) { WriteGuard l(m_lock); noteReadyWithoutWriteGuard(_b); }

libethereum/Client.cpp

@@ -120,7 +120,7 @@ void BasicGasPricer::update(BlockChain const& _bc)
 Client::Client(p2p::Host* _extNet, std::string const& _dbPath, WithExisting _forceAction, u256 _networkId, int _miners):
 	Worker("eth"),
 	m_vc(_dbPath),
-	m_bc(_dbPath, max(m_vc.action(), _forceAction), [](unsigned d, unsigned t){ cerr << "REVISING BLOCKCHAIN: Processed " << d << " of " << t << "..." << endl; }),
+	m_bc(_dbPath, max(m_vc.action(), _forceAction), [](unsigned d, unsigned t){ cerr << "REVISING BLOCKCHAIN: Processed " << d << " of " << t << "...\r"; }),
 	m_gp(new TrivialGasPricer),
 	m_stateDB(State::openDB(_dbPath, max(m_vc.action(), _forceAction))),
 	m_preMine(Address(), m_stateDB),
@@ -441,6 +441,8 @@ void Client::doWork()
 {
 	// TODO: Use condition variable rather than polling.
 
+	bool stillGotWork = false;
+
 	cworkin << "WORK";
 	h256Set changeds;
 
@@ -496,7 +498,10 @@ void Client::doWork()
 		cwork << "BQ ==> CHAIN ==> STATE";
 		OverlayDB db = m_stateDB;
 		x_stateDB.unlock();
-		h256s newBlocks = m_bc.sync(m_bq, db, 100);	// TODO: remove transactions from m_tq nicely rather than relying on out of date nonce later on.
+		h256s newBlocks;
+		bool sgw;
+		tie(newBlocks, sgw) = m_bc.sync(m_bq, db, 100);	// TODO: remove transactions from m_tq nicely rather than relying on out of date nonce later on.
+		stillGotWork = stillGotWork | sgw;
 		if (newBlocks.size())
 		{
 			for (auto i: newBlocks)
@@ -544,7 +549,9 @@ void Client::doWork()
 	noteChanged(changeds);
 	cworkout << "WORK";
 
+	if (!stillGotWork)
 		this_thread::sleep_for(chrono::milliseconds(100));
+
 	if (chrono::system_clock::now() - m_lastGarbageCollection > chrono::seconds(5))
 	{
 		// watches garbage collection
@@ -601,7 +608,7 @@ void Client::inject(bytesConstRef _rlp)
 {
 	startWorking();
 	
-	m_tq.attemptImport(_rlp);
+	m_tq.import(_rlp);
 }
 
 void Client::flushTransactions()

libethereum/ClientBase.cpp

@@ -44,7 +44,7 @@ void ClientBase::submitTransaction(Secret _secret, u256 _value, Address _dest, b
 	
 	u256 n = postMine().transactionsFrom(toAddress(_secret));
 	Transaction t(_value, _gasPrice, _gas, _dest, _data, n, _secret);
-	m_tq.attemptImport(t.rlp());
+	m_tq.import(t.rlp());
 	
 	StructuredLogger::transactionReceived(t.sha3().abridged(), t.sender().abridged());
 	cnote << "New transaction " << t;
@@ -56,7 +56,7 @@ Address ClientBase::submitTransaction(Secret _secret, u256 _endowment, bytes con
 	
 	u256 n = postMine().transactionsFrom(toAddress(_secret));
 	Transaction t(_endowment, _gasPrice, _gas, _init, n, _secret);
-	m_tq.attemptImport(t.rlp());
+	m_tq.import(t.rlp());
 
 	StructuredLogger::transactionReceived(t.sha3().abridged(), t.sender().abridged());
 	cnote << "New transaction " << t;

libethereum/EthereumPeer.cpp

@@ -326,15 +326,27 @@ bool EthereumPeer::interpret(unsigned _id, RLP const& _r)
 	case TransactionsPacket:
 	{
 		clogS(NetMessageSummary) << "Transactions (" << dec << _r.itemCount() << "entries)";
-		addRating(_r.itemCount());
 		Guard l(x_knownTransactions);
 		for (unsigned i = 0; i < _r.itemCount(); ++i)
 		{
 			auto h = sha3(_r[i].data());
 			m_knownTransactions.insert(h);
-			if (!host()->m_tq.import(_r[i].data()))
+			ImportResult ir = host()->m_tq.import(_r[i].data());
+			switch (ir)
+			{
+			case ImportResult::Malformed:
+				addRating(-100);
+				break;
+			case ImportResult::AlreadyKnown:
 				// if we already had the transaction, then don't bother sending it on.
+				addRating(0);
+				break;
+			case ImportResult::Success:
+				addRating(100);
 				host()->m_transactionsSent.insert(h);
+				break;
+			default:;
+			}
 		}
 		break;
 	}
@@ -352,6 +364,7 @@ bool EthereumPeer::interpret(unsigned _id, RLP const& _r)
 		for (unsigned i = 0; i < c && p; ++i, p = host()->m_chain.details(p).parent)
 			s << p;
 		sealAndSend(s);
+		addRating(0);
 		break;
 	}
 	case BlockHashesPacket:
@@ -370,6 +383,7 @@ bool EthereumPeer::interpret(unsigned _id, RLP const& _r)
 		}
 		for (unsigned i = 0; i < _r.itemCount(); ++i)
 		{
+			addRating(1);
 			auto h = _r[i].toHash<h256>();
 			if (host()->m_chain.isKnown(h))
 			{
@@ -398,6 +412,7 @@ bool EthereumPeer::interpret(unsigned _id, RLP const& _r)
 				++n;
 			}
 		}
+		addRating(0);
 		RLPStream s;
 		prep(s, BlocksPacket, n).appendRaw(rlp, n);
 		sealAndSend(s);
@@ -497,6 +512,7 @@ bool EthereumPeer::interpret(unsigned _id, RLP const& _r)
 				setNeedsSyncing(h, _r[1].toInt<u256>());
 				break;
 			}
+
 			Guard l(x_knownBlocks);
 			m_knownBlocks.insert(h);
 		}

libethereum/TransactionQueue.cpp

@@ -28,14 +28,16 @@ using namespace std;
 using namespace dev;
 using namespace dev::eth;
 
-bool TransactionQueue::import(bytesConstRef _transactionRLP)
+ImportResult TransactionQueue::import(bytesConstRef _transactionRLP)
 {
 	// Check if we already know this transaction.
 	h256 h = sha3(_transactionRLP);
 
 	UpgradableGuard l(m_lock);
+	// TODO: keep old transactions around and check in State for nonce validity
+
 	if (m_known.count(h))
-		return false;
+		return ImportResult::AlreadyKnown;
 
 	try
 	{
@@ -52,15 +54,15 @@ bool TransactionQueue::import(bytesConstRef _transactionRLP)
 	catch (Exception const& _e)
 	{
 		cwarn << "Ignoring invalid transaction: " <<  diagnostic_information(_e);
-		return false;
+		return ImportResult::Malformed;
 	}
 	catch (std::exception const& _e)
 	{
 		cwarn << "Ignoring invalid transaction: " << _e.what();
-		return false;
+		return ImportResult::Malformed;
 	}
 
-	return true;
+	return ImportResult::Success;
 }
 
 void TransactionQueue::setFuture(std::pair<h256, Transaction> const& _t)

libethereum/TransactionQueue.h

@@ -23,8 +23,8 @@
 
 #include <boost/thread.hpp>
 #include <libdevcore/Common.h>
-#include "libethcore/Common.h"
 #include <libdevcore/Guards.h>
+#include "libethcore/Common.h"
 #include "Transaction.h"
 
 namespace dev
@@ -34,6 +34,7 @@ namespace eth
 
 class BlockChain;
 
+
 /**
  * @brief A queue of Transactions, each stored as RLP.
  * @threadsafe
@@ -41,9 +42,8 @@ class BlockChain;
 class TransactionQueue
 {
 public:
-	bool attemptImport(bytesConstRef _tx) { try { import(_tx); return true; } catch (...) { return false; } }
+	ImportResult import(bytes const& _tx) { return import(&_tx); }
-	bool attemptImport(bytes const& _tx) { return attemptImport(&_tx); }
+	ImportResult import(bytesConstRef _tx);
-	bool import(bytesConstRef _tx);
 
 	void drop(h256 _txHash);
 

libp2p/Capability.cpp

@@ -53,7 +53,7 @@ void Capability::sealAndSend(RLPStream& _s)
 	m_session->sealAndSend(_s);
 }
 
-void Capability::addRating(unsigned _r)
+void Capability::addRating(int _r)
 {
 	m_session->addRating(_r);
 }

libp2p/Capability.h

@@ -52,7 +52,7 @@ protected:
 
 	RLPStream& prep(RLPStream& _s, unsigned _id, unsigned _args = 0);
 	void sealAndSend(RLPStream& _s);
-	void addRating(unsigned _r);
+	void addRating(int _r);
 
 private:
 	Session* m_session;

libp2p/Session.cpp

@@ -77,12 +77,14 @@ NodeId Session::id() const
 	return m_peer ? m_peer->id : NodeId();
 }
 
-void Session::addRating(unsigned _r)
+void Session::addRating(int _r)
 {
 	if (m_peer)
 	{
 		m_peer->m_rating += _r;
 		m_peer->m_score += _r;
+		if (_r >= 0)
+			m_peer->noteSessionGood();
 	}
 }
 

libp2p/Session.h

@@ -74,7 +74,7 @@ public:
 	void sealAndSend(RLPStream& _s);
 
 	int rating() const;
-	void addRating(unsigned _r);
+	void addRating(int _r);
 
 	void addNote(std::string const& _k, std::string const& _v) { m_info.notes[_k] = _v; }
 

test/blockchain.cpp

@@ -98,7 +98,7 @@ void doBlockchainTests(json_spirit::mValue& _v, bool _fillin)
 				{
 					mObject tx = txObj.get_obj();
 					importer.importTransaction(tx);
-					if (!txs.attemptImport(importer.m_transaction.rlp()))
+					if (txs.import(importer.m_transaction.rlp()) != ImportResult::Success)
 						cnote << "failed importing transaction\n";
 				}