Structured logger can output to a file.

Better support of imports/keys and key manager integration for eth.

eth/main.cpp

@@ -91,10 +91,8 @@ void interactiveHelp()
 		<< "    minestart  Starts mining." << endl
 		<< "    minestop  Stops mining." << endl
 		<< "    mineforce <enable>  Forces mining, even when there are no transactions." << endl
-		<< "    address  Gives the current address." << endl
-		<< "    secret  Gives the current secret" << endl
 		<< "    block  Gives the current block height." << endl
-		<< "    balance  Gives the current balance." << endl
+		<< "    accounts  Gives information on all owned accounts (balances, mining beneficiary and default signer)." << endl
 		<< "    transact  Execute a given transaction." << endl
 		<< "    send  Execute a given transaction with current secret." << endl
 		<< "    contract  Create a new contract with current secret." << endl
@@ -103,7 +101,7 @@ void interactiveHelp()
 		<< "    listaccounts  List the accounts on the network." << endl
 		<< "    listcontracts  List the contracts on the network." << endl
 #endif
-		<< "    setsecret <secret>  Set the secret to the hex secret key." << endl
+		<< "    setsigningkey <addr>  Set the address with which to sign transactions." << endl
 		<< "    setaddress <addr>  Set the coinbase (mining payout) address." << endl
 		<< "    exportconfig <path>  Export the config (.RLP) to the path provided." << endl
 		<< "    importconfig <path>  Import the config (.RLP) from the path provided." << endl
@@ -127,13 +125,18 @@ void help()
 #endif
 		<< "    -K,--kill  First kill the blockchain." << endl
 		<< "    -R,--rebuild  Rebuild the blockchain from the existing database." << endl
-		<< "    -s,--secret <secretkeyhex>  Set the secret key for use with send command (default: auto)." << endl
+		<< "    -s,--import-secret <secret>  Import a secret key into the key store and use as the default." << endl
-		<< "    -S,--session-secret <secretkeyhex>  Set the secret key for use with send command, for this session only." << endl
+		<< "    -S,--import-session-secret <secret>  Import a secret key into the key store and use as the default for this session only." << endl
+		<< "    --sign-key <address>  Sign all transactions with the key of the given address." << endl
+		<< "    --session-sign-key <address>  Sign all transactions with the key of the given address for this session only." << endl
 		<< "    --master <password>  Give the master password for the key store." << endl
+		<< "    --password <password>  Give a password for a private key." << endl
+		<< endl
 		<< "Client transacting:" << endl
 		<< "    -B,--block-fees <n>  Set the block fee profit in the reference unit e.g. ¢ (default: 15)." << endl
 		<< "    -e,--ether-price <n>  Set the ether price in the reference unit e.g. ¢ (default: 30.679)." << endl
 		<< "    -P,--priority <0 - 100>  Default % priority of a transaction (default: 50)." << endl
+		<< endl
 		<< "Client mining:" << endl
 		<< "    -a,--address <addr>  Set the coinbase (mining payout) address to addr (default: auto)." << endl
 		<< "    -m,--mining <on/off/number>  Enable mining, optionally for a specified number of blocks (default: off)" << endl
@@ -143,6 +146,7 @@ void help()
 		<< "    --opencl-platform <n>  When mining using -G/--opencl use OpenCL platform n (default: 0)." << endl
 		<< "    --opencl-device <n>  When mining using -G/--opencl use OpenCL device n (default: 0)." << endl
 		<< "    -t, --mining-threads <n> Limit number of CPU/GPU miners to n (default: use everything available on selected platform)" << endl
+		<< endl
 		<< "Client networking:" << endl
 		<< "    --client-name <name>  Add a name to your client's version string (default: blank)." << endl
 		<< "    -b,--bootstrap  Connect to the default Ethereum peerserver." << endl
@@ -155,12 +159,15 @@ void help()
 		<< "    --network-id <n> Only connect to other hosts with this network id (default:0)." << endl
 		<< "    --upnp <on/off>  Use UPnP for NAT (default: on)." << endl
 #if ETH_JSONRPC || !ETH_TRUE
+		<< endl
 		<< "Work farming mode:" << endl
 		<< "    -F,--farm <url>  Put into mining farm mode with the work server at URL. Use with -G/--opencl." << endl
 		<< "    --farm-recheck <n>  Leave n ms between checks for changed work (default: 500)." << endl
 #endif
+		<< endl
 		<< "Ethash verify mode:" << endl
 		<< "    -w,--check-pow <headerHash> <seedHash> <difficulty> <nonce>  Check PoW credentials for validity." << endl
+		<< endl
 		<< "Benchmarking mode:" << endl
 		<< "    -M,--benchmark  Benchmark for mining and exit; use with --cpu and --opencl." << endl
 		<< "    --benchmark-warmup <seconds>  Set the duration of warmup for the benchmark tests (default: 3)." << endl
@@ -169,14 +176,17 @@ void help()
 #if ETH_JSONRPC || !ETH_TRUE
 		<< "    --phone-home <on/off>  When benchmarking, publish results (default: on)" << endl
 #endif
+		<< endl
 		<< "DAG creation mode:" << endl
 		<< "    -D,--create-dag <this/next/number>  Create the DAG in preparation for mining on given block and exit." << endl
+		<< endl
 		<< "Import/export modes:" << endl
 		<< "    -I,--import <file>  Import file as a concatenated series of blocks and exit." << endl
 		<< "    -E,--export <file>  Export file as a concatenated series of blocks and exit." << endl
 		<< "    --from <n>  Export only from block n; n may be a decimal, a '0x' prefixed hash, or 'latest'." << endl
 		<< "    --to <n>  Export only to block n (inclusive); n may be a decimal, a '0x' prefixed hash, or 'latest'." << endl
 		<< "    --only <n>  Equivalent to --export-from n --export-to n." << endl
+		<< endl
 		<< "General Options:" << endl
 		<< "    -d,--db-path <path>  Load database from path (default: " << getDataDir() << ")" << endl
 #if ETH_EVMJIT || !ETH_TRUE
@@ -539,13 +549,14 @@ int main(int argc, char** argv)
 	/// Mining params
 	unsigned mining = 0;
 	bool forceMining = false;
-	KeyPair sigKey = KeyPair::create();
+	Address signingKey;
-	Secret sessionSecret;
+	Address sessionKey;
-	Address coinbase = sigKey.address();
+	Address beneficiary = signingKey;
 
 	/// Structured logging params
 	bool structuredLogging = false;
 	string structuredLoggingFormat = "%Y-%m-%dT%H:%M:%S";
+	string structuredLoggingURL;
 
 	/// Transaction params
 	TransactionPriority priority = TransactionPriority::Medium;
@@ -570,11 +581,20 @@ int main(int argc, char** argv)
 
 	string configFile = getDataDir() + "/config.rlp";
 	bytes b = contents(configFile);
+
+	strings passwordsToNote;
+	Secrets toImport;
 	if (b.size())
 	{
 		RLP config(b);
-		sigKey = KeyPair(config[0].toHash<Secret>());
+		if (config[0].size() == 32)	// secret key - import and forget.
-		coinbase = config[1].toHash<Address>();
+		{
+			Secret s = config[0].toHash<Secret>();
+			toImport.push_back(s);
+		}
+		else							// new format - just use it as an address.
+			signingKey = config[0].toHash<Address>();
+		beneficiary = config[1].toHash<Address>();
 	}
 
 	for (int i = 1; i < argc; ++i)
@@ -602,6 +622,8 @@ int main(int argc, char** argv)
 				cerr << "-p is DEPRECATED. It will be removed for the Frontier. Use --port instead (or place directly as host:port)." << endl;
 			remotePort = (short)atoi(argv[++i]);
 		}
+		else if (arg == "--password" && i + 1 < argc)
+			passwordsToNote.push_back(argv[++i]);
 		else if (arg == "--master" && i + 1 < argc)
 			masterPassword = argv[++i];
 		else if ((arg == "-I" || arg == "--import") && i + 1 < argc)
@@ -744,7 +766,7 @@ int main(int argc, char** argv)
 		}
 		else if ((arg == "-a" || arg == "--address" || arg == "--coinbase-address") && i + 1 < argc)
 			try {
-				coinbase = h160(fromHex(argv[++i], WhenError::Throw));
+				beneficiary = h160(fromHex(argv[++i], WhenError::Throw));
 			}
 			catch (BadHexCharacter&)
 			{
@@ -760,14 +782,32 @@ int main(int argc, char** argv)
 			minerType = MinerType::CPU;
 		else if (arg == "-G" || arg == "--opencl")
 			minerType = MinerType::GPU;
-		else if ((arg == "-s" || arg == "--secret") && i + 1 < argc)
+		/*<< "    -s,--import-secret <secret>  Import a secret key into the key store and use as the default." << endl
-			sigKey = KeyPair(h256(fromHex(argv[++i])));
+		<< "    -S,--import-session-secret <secret>  Import a secret key into the key store and use as the default for this session only." << endl
-		else if ((arg == "-S" || arg == "--session-secret") && i + 1 < argc)
+		<< "    --sign-key <address>  Sign all transactions with the key of the given address." << endl
-			sessionSecret = h256(fromHex(argv[++i]));
+		<< "    --session-sign-key <address>  Sign all transactions with the key of the given address for this session only." << endl*/
+		else if ((arg == "-s" || arg == "--import-secret") && i + 1 < argc)
+		{
+			Secret s(fromHex(argv[++i]));
+			toImport.push_back(s);
+			signingKey = toAddress(s);
+		}
+		else if ((arg == "-S" || arg == "--import-session-secret") && i + 1 < argc)
+		{
+			Secret s(fromHex(argv[++i]));
+			toImport.push_back(s);
+			sessionKey = toAddress(s);
+		}
+		else if ((arg == "--sign-key") && i + 1 < argc)
+			sessionKey = Address(fromHex(argv[++i]));
+		else if ((arg == "--session-sign-key") && i + 1 < argc)
+			sessionKey = Address(fromHex(argv[++i]));
 		else if (arg == "--structured-logging-format" && i + 1 < argc)
 			structuredLoggingFormat = string(argv[++i]);
 		else if (arg == "--structured-logging")
 			structuredLogging = true;
+		else if (arg == "--structured-logging-destination" && i + 1 < argc)
+			structuredLoggingURL = argv[++i];
 		else if ((arg == "-d" || arg == "--path" || arg == "--db-path") && i + 1 < argc)
 			dbPath = argv[++i];
 		else if ((arg == "-D" || arg == "--create-dag") && i + 1 < argc)
@@ -951,16 +991,24 @@ int main(int argc, char** argv)
 		}
 	}
 
+	KeyManager keyManager;
+	for (auto const& s: passwordsToNote)
+		keyManager.notePassword(s);
+	for (auto const& s: toImport)
+	{
+		keyManager.import(s, "Imported key");
+		if (!signingKey)
+			signingKey = toAddress(s);
+	}
+
 	{
 		RLPStream config(2);
-		config << sigKey.secret() << coinbase;
+		config << signingKey << beneficiary;
 		writeFile(configFile, config.out());
 	}
 
-	if (sessionSecret)
+	if (sessionKey)
-		sigKey = KeyPair(sessionSecret);
+		signingKey = sessionKey;
-
-	
 
 	if (minerType == MinerType::CPU)
 		ProofOfWork::CPUMiner::setNumInstances(miningThreads);
@@ -985,7 +1033,7 @@ int main(int argc, char** argv)
 	if (!clientName.empty())
 		clientName += "/";
 
-	StructuredLogger::get().initialize(structuredLogging, structuredLoggingFormat);
+	StructuredLogger::get().initialize(structuredLogging, structuredLoggingFormat, structuredLoggingURL);
 	VMFactory::setKind(jit ? VMKind::JIT : VMKind::Interpreter);
 	auto netPrefs = publicIP.empty() ? NetworkPreferences(listenIP ,listenPort, upnp) : NetworkPreferences(publicIP, listenIP ,listenPort, upnp);
 	auto nodesState = contents((dbPath.size() ? dbPath : getDataDir()) + "/network.rlp");
@@ -1074,12 +1122,12 @@ int main(int argc, char** argv)
 		c->setGasPricer(gasPricer);
 		c->setForceMining(forceMining);
 		c->setTurboMining(minerType == MinerType::GPU);
-		c->setAddress(coinbase);
+		c->setAddress(beneficiary);
 		c->setNetworkId(networkId);
 	}
 
-	cout << "Transaction Signer: " << sigKey.address() << endl;
+	cout << "Transaction Signer: " << signingKey << endl;
-	cout << "Mining Benefactor: " << coinbase << endl;
+	cout << "Mining Benefactor: " << beneficiary << endl;
 	web3.startNetwork();
 	cout << "Node ID: " << web3.enode() << endl;
 
@@ -1088,9 +1136,7 @@ int main(int argc, char** argv)
 	if (remoteHost.size())
 		web3.addNode(p2p::NodeId(), remoteHost + ":" + toString(remotePort));
 
-	KeyManager keyManager;
 	if (keyManager.exists())
-	{
 		while (masterPassword.empty())
 		{
 			masterPassword = getPassword("Please enter your MASTER password: ");
@@ -1100,14 +1146,12 @@ int main(int argc, char** argv)
 				masterPassword.clear();
 			}
 		}
-	}
 	else
 	{
 		while (masterPassword.empty())
 		{
 			masterPassword = getPassword("Please enter a MASTER password to protect your key store (make it strong!): ");
 			string confirm = getPassword("Please confirm the password by entering it again: ");
-			getline(cin, confirm);
 			if (masterPassword != confirm)
 			{
 				cout << "Passwords were different. Try again." << endl;
@@ -1123,7 +1167,14 @@ int main(int argc, char** argv)
 	g_logPost = [&](std::string const& a, char const*) { if (silence) logbuf += a + "\n"; else cout << "\r           \r" << a << endl << additional << flush; };
 
 	// TODO: give hints &c.
-	auto getPassword = [&](Address const& a){ auto s = silence; silence = true; cout << endl; string ret = dev::getPassword("Enter password for address " + a.abridged() + ": "); silence = s; return ret; };
+	auto getPassword = [&](Address const& a){
+		auto s = silence;
+		silence = true;
+		cout << endl;
+		string ret = dev::getPassword("Enter password for address " + keyManager.accountDetails()[a].first + " (" + a.abridged() + "; hint:" + keyManager.accountDetails()[a].second + "): ");
+		silence = s;
+		return ret;
+	};
 
 #if ETH_JSONRPC || !ETH_TRUE
 	shared_ptr<WebThreeStubServer> jsonrpcServer;
@@ -1131,7 +1182,7 @@ int main(int argc, char** argv)
 	if (jsonrpc > -1)
 	{
 		jsonrpcConnector = unique_ptr<jsonrpc::AbstractServerConnector>(new jsonrpc::HttpServer(jsonrpc, "", "", SensibleHttpThreads));
-		jsonrpcServer = shared_ptr<WebThreeStubServer>(new WebThreeStubServer(*jsonrpcConnector.get(), web3, make_shared<SimpleAccountHolder>([&](){return web3.ethereum();}, getPassword, keyManager), vector<KeyPair>({sigKey})));
+		jsonrpcServer = shared_ptr<WebThreeStubServer>(new WebThreeStubServer(*jsonrpcConnector.get(), web3, make_shared<SimpleAccountHolder>([&](){return web3.ethereum();}, getPassword, keyManager), vector<KeyPair>()));
 		jsonrpcServer->StartListening();
 	}
 #endif
@@ -1275,7 +1326,7 @@ int main(int argc, char** argv)
 				if (jsonrpc < 0)
 					jsonrpc = SensibleHttpPort;
 				jsonrpcConnector = unique_ptr<jsonrpc::AbstractServerConnector>(new jsonrpc::HttpServer(jsonrpc, "", "", SensibleHttpThreads));
-				jsonrpcServer = shared_ptr<WebThreeStubServer>(new WebThreeStubServer(*jsonrpcConnector.get(), web3, make_shared<SimpleAccountHolder>([&](){return web3.ethereum();}, getPassword, keyManager), vector<KeyPair>({sigKey})));
+				jsonrpcServer = shared_ptr<WebThreeStubServer>(new WebThreeStubServer(*jsonrpcConnector.get(), web3, make_shared<SimpleAccountHolder>([&](){return web3.ethereum();}, getPassword, keyManager), vector<KeyPair>()));
 				jsonrpcServer->StartListening();
 			}
 			else if (cmd == "jsonstop")
@@ -1287,11 +1338,8 @@ int main(int argc, char** argv)
 #endif
 			else if (cmd == "address")
 			{
-				cout << "Current address:" << endl << sigKey.address() << endl;
+				cout << "Current mining beneficiary:" << endl << beneficiary << endl;
-			}
+				cout << "Current signing account:" << endl << signingKey << endl;
-			else if (cmd == "secret")
-			{
-				cout << "Secret Key: " << sigKey.secret() << endl;
 			}
 			else if (c && cmd == "block")
 			{
@@ -1306,7 +1354,15 @@ int main(int argc, char** argv)
 			}
 			else if (c && cmd == "balance")
 			{
-				cout << "Current balance: " << formatBalance( c->balanceAt(sigKey.address())) << " = " <<c->balanceAt(sigKey.address()) << " wei" << endl;
+				cout << "Current balance:" << endl;
+				u256 total = 0;
+				for (auto const& i: keyManager.accountDetails())
+				{
+					auto b = c->balanceAt(i.first);
+					cout << ((i.first == signingKey) ? "SIGNING " : "        ") << ((i.first == beneficiary) ? "COINBASE " : "         ") << i.second.first << " (" << i.first << "): " << formatBalance(b) << " = " << b << " wei" << endl;
+					total += b;
+				}
+				cout << "Total: " << formatBalance(total) << " = " << total << " wei" << endl;
 			}
 			else if (c && cmd == "transact")
 			{
@@ -1422,7 +1478,7 @@ int main(int argc, char** argv)
 						try
 						{
 							Address dest = h160(fromHex(hexAddr, WhenError::Throw));
-							c->submitTransaction(sigKey.secret(), amount, dest, bytes(), minGas);
+							c->submitTransaction(keyManager.secret(signingKey, [&](){ return getPassword(signingKey); }), amount, dest, bytes(), minGas);
 						}
 						catch (BadHexCharacter& _e)
 						{
@@ -1491,7 +1547,7 @@ int main(int argc, char** argv)
 					else if (gas < minGas)
 						cwarn << "Minimum gas amount is" << minGas;
 					else
-						c->submitTransaction(sigKey.secret(), endowment, init, gas, gasPrice);
+						c->submitTransaction(keyManager.secret(signingKey, [&](){ return getPassword(signingKey); }), endowment, init, gas, gasPrice);
 				}
 				else
 					cwarn << "Require parameters: contract ENDOWMENT GASPRICE GAS CODEHEX";
@@ -1602,13 +1658,13 @@ int main(int argc, char** argv)
 					}
 				}
 			}
-			else if (cmd == "setsecret")
+			else if (cmd == "setsigningkey")
 			{
 				if (iss.peek() != -1)
 				{
 					string hexSec;
 					iss >> hexSec;
-					sigKey = KeyPair(h256(fromHex(hexSec)));
+					signingKey = Address(fromHex(hexSec));
 				}
 				else
 					cwarn << "Require parameter: setSecret HEXSECRETKEY";
@@ -1625,7 +1681,7 @@ int main(int argc, char** argv)
 					{
 						try
 						{
-							coinbase = h160(fromHex(hexAddr, WhenError::Throw));
+							beneficiary = h160(fromHex(hexAddr, WhenError::Throw));
 						}
 						catch (BadHexCharacter& _e)
 						{
@@ -1648,7 +1704,7 @@ int main(int argc, char** argv)
 					string path;
 					iss >> path;
 					RLPStream config(2);
-					config << sigKey.secret() << coinbase;
+					config << signingKey << beneficiary;
 					writeFile(path, config.out());
 				}
 				else
@@ -1664,8 +1720,8 @@ int main(int argc, char** argv)
 					if (b.size())
 					{
 						RLP config(b);
-						sigKey = KeyPair(config[0].toHash<Secret>());
+						signingKey = config[0].toHash<Address>();
-						coinbase = config[1].toHash<Address>();
+						beneficiary = config[1].toHash<Address>();
 					}
 					else
 						cwarn << path << "has no content!";

libdevcore/StructuredLogger.cpp

@@ -34,6 +34,15 @@ using namespace std;
 namespace dev
 {
 
+void StructuredLogger::initialize(bool _enabled, std::string const& _timeFormat, std::string const& _destinationURL)
+{
+	m_enabled = _enabled;
+	m_timeFormat = _timeFormat;
+	if (_destinationURL.size() > 7 && _destinationURL.substr(0, 7) == "file://")
+		m_out.open(_destinationURL.substr(7));
+	// TODO: support tcp://
+}
+
 void StructuredLogger::outputJson(Json::Value const& _value, std::string const& _name) const
 {
 	Json::Value event;
@@ -41,7 +50,7 @@ void StructuredLogger::outputJson(Json::Value const& _value, std::string const&
 	Json::FastWriter fastWriter;
 	Guard l(s_lock);
 	event[_name] = _value;
-	cout << fastWriter.write(event) << endl;
+	(m_out.is_open() ? m_out : cout) << fastWriter.write(event) << endl;
 }
 
 void StructuredLogger::starting(string const& _clientImpl, const char* _ethVersion)
@@ -51,6 +60,7 @@ void StructuredLogger::starting(string const& _clientImpl, const char* _ethVersi
 		Json::Value event;
 		event["client_impl"] = _clientImpl;
 		event["eth_version"] = std::string(_ethVersion);
+		// TODO net_version
 		event["ts"] = dev::toString(chrono::system_clock::now(), get().m_timeFormat.c_str());
 
 		get().outputJson(event, "starting");
@@ -64,6 +74,7 @@ void StructuredLogger::stopping(string const& _clientImpl, const char* _ethVersi
 		Json::Value event;
 		event["client_impl"] = _clientImpl;
 		event["eth_version"] = std::string(_ethVersion);
+		// TODO net_version
 		event["ts"] = dev::toString(chrono::system_clock::now(), get().m_timeFormat.c_str());
 
 		get().outputJson(event, "stopping");

libdevcore/StructuredLogger.h

@@ -25,6 +25,7 @@
 
 #pragma once
 
+#include <fstream>
 #include <string>
 #include <chrono>
 
@@ -46,11 +47,7 @@ public:
 	 *                        http://en.cppreference.com/w/cpp/chrono/c/strftime
 	 *                        with which to display timestamps
 	 */
-	void initialize(bool _enabled, std::string const& _timeFormat)
+	void initialize(bool _enabled, std::string const& _timeFormat, std::string const& _destinationURL);
-	{
-		m_enabled = _enabled;
-		m_timeFormat = _timeFormat;
-	}
 
 	static StructuredLogger& get()
 	{
@@ -92,6 +89,11 @@ public:
 		std::string const& _prevHash
 	);
 	static void transactionReceived(std::string const& _hash, std::string const& _remoteId);
+	// TODO: static void pendingQueueChanged(std::vector<h256> const& _hashes);
+	// TODO: static void miningStarted();
+	// TODO: static void stillMining(unsigned _hashrate);
+	// TODO: static void miningStopped();
+
 private:
 	// Singleton class. Private default ctor and no copying
 	StructuredLogger() = default;
@@ -102,6 +104,8 @@ private:
 
 	bool m_enabled = false;
 	std::string m_timeFormat = "%Y-%m-%dT%H:%M:%S";
+
+	mutable std::ofstream m_out;
 };
 
 }

libethereum/BlockChain.cpp

@@ -456,7 +456,7 @@ ImportRoute BlockChain::import(bytes const& _block, OverlayDB const& _db, Import
 	{
 		// Check transactions are valid and that they result in a state equivalent to our state_root.
 		// Get total difficulty increase and update state, checking it.
-		State s(_db);	//, bi.coinbaseAddress
+		State s(_db);
 		auto tdIncrease = s.enactOn(&_block, bi, *this, _ir);
 
 		BlockLogBlooms blb;
@@ -467,6 +467,7 @@ ImportRoute BlockChain::import(bytes const& _block, OverlayDB const& _db, Import
 			br.receipts.push_back(s.receipt(i));
 		}
 		s.cleanup(true);
+
 		td = pd.totalDifficulty + tdIncrease;
 
 #if ETH_TIMED_IMPORTS
@@ -603,7 +604,6 @@ ImportRoute BlockChain::import(bytes const& _block, OverlayDB const& _db, Import
 		{
 			newLastBlockHash = bi.hash();
 			newLastBlockNumber = (unsigned)bi.number;
-			extrasBatch.Put(ldb::Slice("best"), ldb::Slice((char const*)&(bi.hash()), 32));
 		}
 
 		clog(BlockChainNote) << "   Imported and best" << td << " (#" << bi.number << "). Has" << (details(bi.parentHash).children.size() - 1) << "siblings. Route:" << route;
@@ -623,12 +623,33 @@ ImportRoute BlockChain::import(bytes const& _block, OverlayDB const& _db, Import
 	m_blocksDB->Write(m_writeOptions, &blocksBatch);
 	m_extrasDB->Write(m_writeOptions, &extrasBatch);
 
-	DEV_WRITE_GUARDED(x_lastBlockHash)
+	if (isKnown(bi.hash()) && !details(bi.hash()))
 	{
-		m_lastBlockHash = newLastBlockHash;
+		clog(BlockChainDebug) << "Known block just inserted has no details.";
-		m_lastBlockNumber = newLastBlockNumber;
+		clog(BlockChainDebug) << "Block:" << bi;
+		clog(BlockChainDebug) << "DATABASE CORRUPTION: CRITICAL FAILURE";
+		exit(-1);
 	}
 
+	try {
+		State canary(_db, *this, bi.hash());
+	}
+	catch (...)
+	{
+		clog(BlockChainDebug) << "Failed to initialise State object form imported block.";
+		clog(BlockChainDebug) << "Block:" << bi;
+		clog(BlockChainDebug) << "DATABASE CORRUPTION: CRITICAL FAILURE";
+		exit(-1);
+	}
+
+	if (m_lastBlockHash != newLastBlockHash)
+		DEV_WRITE_GUARDED(x_lastBlockHash)
+		{
+			m_lastBlockHash = newLastBlockHash;
+			m_lastBlockNumber = newLastBlockNumber;
+			m_extrasDB->Put(m_writeOptions, ldb::Slice("best"), ldb::Slice((char const*)&m_lastBlockHash, 32));
+		}
+
 #if ETH_PARANOIA || !ETH_TRUE
 	checkConsistency();
 #endif
@@ -646,14 +667,6 @@ ImportRoute BlockChain::import(bytes const& _block, OverlayDB const& _db, Import
 	if (!route.empty())
 		noteCanonChanged();
 
-	if (isKnown(bi.hash()) && !details(bi.hash()))
-	{
-		clog(BlockChainDebug) << "Known block just inserted has no details.";
-		clog(BlockChainDebug) << "Block:" << bi;
-		clog(BlockChainDebug) << "DATABASE CORRUPTION: CRITICAL FAILURE";
-		exit(-1);
-	}
-
 	h256s fresh;
 	h256s dead;
 	bool isOld = true;

libethereum/KeyManager.h

@@ -66,6 +66,8 @@ public:
 	bool load(std::string const& _pass);
 	void save(std::string const& _pass) const { write(_pass, m_keysFile); }
 
+	void notePassword(std::string const& _pass) { m_cachedPasswords[hashPassword(_pass)] = _pass; }
+
 	AddressHash accounts() const;
 	std::unordered_map<Address, std::pair<std::string, std::string>> accountDetails() const;
 

libethereum/State.cpp

@@ -707,6 +707,7 @@ void State::cleanup(bool _fullCommit)
 {
 	if (_fullCommit)
 	{
+
 		paranoia("immediately before database commit", true);
 
 		// Commit the new trie to disk.

libethereum/State.h

@@ -49,7 +49,7 @@ class BlockChain;
 class State;
 
 struct StateChat: public LogChannel { static const char* name(); static const int verbosity = 4; };
-struct StateTrace: public LogChannel { static const char* name(); static const int verbosity = 7; };
+struct StateTrace: public LogChannel { static const char* name(); static const int verbosity = 5; };
 struct StateDetail: public LogChannel { static const char* name(); static const int verbosity = 14; };
 struct StateSafeExceptions: public LogChannel { static const char* name(); static const int verbosity = 21; };