Private chains redux:

- Can switching between them and main chain without losing either.
- No discovery on network when private.
- Private chain id encoded in genesis block and network id remains same.

alethzero/MainWin.cpp

@@ -378,10 +378,17 @@ NetworkPreferences Main::netPrefs() const
 		publicIP.clear();
 	}
 
+	NetworkPreferences ret;
+
 	if (isPublicAddress(publicIP))
-		return NetworkPreferences(publicIP, listenIP, ui->port->value(), ui->upnp->isChecked());
+		ret = NetworkPreferences(publicIP, listenIP, ui->port->value(), ui->upnp->isChecked());
 	else
-		return NetworkPreferences(listenIP, ui->port->value(), ui->upnp->isChecked());
+		ret = NetworkPreferences(listenIP, ui->port->value(), ui->upnp->isChecked());
+
+	ret.discovery = m_privateChain.isEmpty();
+	ret.pin = m_privateChain.isEmpty();
+
+	return ret;
 }
 
 void Main::onKeysChanged()
@@ -776,6 +783,30 @@ void Main::writeSettings()
 	s.setValue("windowState", saveState());
 }
 
+void Main::setPrivateChain(QString const& _private, bool _forceConfigure)
+{
+	if (m_privateChain == _private && !_forceConfigure)
+		return;
+
+	m_privateChain = _private;
+	ui->usePrivate->setChecked(!m_privateChain.isEmpty());
+
+	CanonBlockChain<Ethash>::forceGenesisExtraData(m_privateChain.isEmpty() ? bytes() : sha3(m_privateChain.toStdString()).asBytes());
+
+	// rejig blockchain now.
+	writeSettings();
+	ui->mine->setChecked(false);
+	ui->net->setChecked(false);
+	web3()->stopNetwork();
+
+	web3()->setNetworkPreferences(netPrefs());
+	ethereum()->reopenChain();
+
+	readSettings(true);
+	installWatches();
+	refreshAll();
+}
+
 Secret Main::retrieveSecret(Address const& _address) const
 {
 	while (true)
@@ -852,8 +883,7 @@ void Main::readSettings(bool _skipGeometry)
 	ui->listenIP->setText(s.value("listenIP", "").toString());
 	ui->port->setValue(s.value("port", ui->port->value()).toInt());
 	ui->nameReg->setText(s.value("nameReg", "").toString());
-	m_privateChain = s.value("privateChain", "").toString();
-	ui->usePrivate->setChecked(m_privateChain.size());
+	setPrivateChain(s.value("privateChain", "").toString());
 	ui->verbosity->setValue(s.value("verbosity", 1).toInt());
 
 #if ETH_EVMJIT // We care only if JIT is enabled. Otherwise it can cause misconfiguration.
@@ -1036,21 +1066,15 @@ void Main::on_exportState_triggered()
 
 void Main::on_usePrivate_triggered()
 {
+	QString pc;
 	if (ui->usePrivate->isChecked())
 	{
-		m_privateChain = QInputDialog::getText(this, "Enter Name", "Enter the name of your private chain", QLineEdit::Normal, QString("NewChain-%1").arg(time(0)));
-		if (m_privateChain.isEmpty())
-		{
-			if (ui->usePrivate->isChecked())
-				ui->usePrivate->setChecked(false);
-			else
-				// was cancelled.
-				return;
-		}
+		bool ok;
+		pc = QInputDialog::getText(this, "Enter Name", "Enter the name of your private chain", QLineEdit::Normal, QString("NewChain-%1").arg(time(0)), &ok);
+		if (!ok)
+			return;
 	}
-	else
-		m_privateChain.clear();
-	on_killBlockchain_triggered();
+	setPrivateChain(pc);
 }
 
 void Main::on_vmInterpreter_triggered() { VMFactory::setKind(VMKind::Interpreter); }
@@ -2015,7 +2039,7 @@ void Main::on_net_triggered()
 	{
 		web3()->setIdealPeerCount(ui->idealPeers->value());
 		web3()->setNetworkPreferences(netPrefs(), ui->dropPeers->isChecked());
-		ethereum()->setNetworkId(m_privateChain.size() ? sha3(m_privateChain.toStdString()) : h256());
+		ethereum()->setNetworkId((h256)(u256)(int)c_network);
 		web3()->startNetwork();
 		ui->downloadView->setEthereum(ethereum());
 		ui->enode->setText(QString::fromStdString(web3()->enode()));

alethzero/MainWin.h

@@ -226,6 +226,8 @@ private:
 	void readSettings(bool _skipGeometry = false);
 	void writeSettings();
 
+	void setPrivateChain(QString const& _private, bool _forceConfigure = false);
+
 	unsigned installWatch(dev::eth::LogFilter const& _tf, WatchHandler const& _f);
 	unsigned installWatch(dev::h256 _tf, WatchHandler const& _f);
 	void uninstallWatch(unsigned _w);

exp/main.cpp

@@ -284,6 +284,21 @@ int main()
 	return 0;
 }
 #elif 1
+
+int main()
+{
+	bytes tx = fromHex("f84c01028332dcd58004801ba024843272ee176277535489859cbd275686023fe64aabd158b6fcdf2ae6a1ab6ba02f252a5016a48e5ec8d17aefaf4324d29b9e123fa623dc5a60539b3ad3610c95");
+	Transaction t(tx, CheckTransaction::None);
+	Public p = recover(t.signature(), t.sha3(WithoutSignature));
+	cnote << t.signature().r;
+	cnote << t.signature().s;
+	cnote << t.signature().v;
+	cnote << p;
+	cnote << toAddress(p);
+	cnote << t.sender();
+}
+
+#elif 0
 void mine(State& s, BlockChain const& _bc, SealEngineFace* _se)
 {
 	s.commitToMine(_bc);

libdevcrypto/Common.cpp

@@ -193,7 +193,7 @@ bytes dev::decryptAES128CTR(bytesConstRef _k, h128 const& _iv, bytesConstRef _ci
 	}
 }
 
-static const Public c_zeroKey = toPublic(Secret());
+static const Public c_zeroKey("3f17f1962b36e491b30a40b2405849e597ba5fb5");
 
 Public dev::recover(Signature const& _sig, h256 const& _message)
 {
@@ -203,7 +203,7 @@ Public dev::recover(Signature const& _sig, h256 const& _message)
 	int pubkeylen;
 	if (!secp256k1_ecdsa_recover_compact(_message.data(), h256::size, _sig.data(), o.data(), &pubkeylen, false, _sig[64]))
 		return Public();
-	ret = FixedHash<64>(o.data()+1, Public::ConstructFromPointer);
+	ret = FixedHash<64>(o.data() + 1, Public::ConstructFromPointer);
 #else
 	ret = s_secp256k1pp.recover(_sig, _message.ref());
 #endif

libethereum/BlockChain.cpp

@@ -146,8 +146,12 @@ static const unsigned c_minCacheSize = 1024 * 1024 * 32;
 
 #endif
 
-BlockChain::BlockChain(bytes const& _genesisBlock, std::unordered_map<Address, Account> const& _genesisState, std::string const& _path, WithExisting _we, ProgressCallback const& _p):
-	m_genesisState(_genesisState)
+BlockChain::BlockChain(bytes const& _genesisBlock, std::unordered_map<Address, Account> const& _genesisState, std::string const& _path, WithExisting _we, ProgressCallback const& _p)
+{
+	open(_genesisBlock, _genesisState, _path, _we, _p);
+}
+
+void BlockChain::open(bytes const& _genesisBlock, std::unordered_map<Address, Account> const& _genesisState, std::string const& _path, WithExisting _we, ProgressCallback const& _p)
 {
 	// initialise deathrow.
 	m_cacheUsage.resize(c_collectionQueueSize);
@@ -156,11 +160,12 @@ BlockChain::BlockChain(bytes const& _genesisBlock, std::unordered_map<Address, A
 	// Initialise with the genesis as the last block on the longest chain.
 	m_genesisBlock = _genesisBlock;
 	m_genesisHash = sha3(RLP(m_genesisBlock)[0].data());
+	m_genesisState = _genesisState;
 
 	// remove the next line real soon. we don't need to be supporting this forever.
 	upgradeDatabase(_path, genesisHash());
 
-	if (open(_path, _we) != c_minorProtocolVersion)
+	if (openDatabase(_path, _we) != c_minorProtocolVersion)
 		rebuild(_path, _p);
 }
 
@@ -169,7 +174,7 @@ BlockChain::~BlockChain()
 	close();
 }
 
-unsigned BlockChain::open(std::string const& _path, WithExisting _we)
+unsigned BlockChain::openDatabase(std::string const& _path, WithExisting _we)
 {
 	string path = _path.empty() ? Defaults::get()->m_dbPath : _path;
 	string chainPath = path + "/" + toHex(m_genesisHash.ref().cropped(0, 4));
@@ -243,12 +248,22 @@ unsigned BlockChain::open(std::string const& _path, WithExisting _we)
 void BlockChain::close()
 {
 	cnote << "Closing blockchain DB";
+	// Not thread safe...
 	delete m_extrasDB;
 	delete m_blocksDB;
 	m_lastBlockHash = m_genesisHash;
 	m_lastBlockNumber = 0;
 	m_details.clear();
 	m_blocks.clear();
+	m_logBlooms.clear();
+	m_receipts.clear();
+	m_transactionAddresses.clear();
+	m_blockHashes.clear();
+	m_blocksBlooms.clear();
+	m_cacheUsage.clear();
+	m_inUse.clear();
+	m_lastLastHashes.clear();
+	m_lastLastHashesNumber = (unsigned)-1;
 }
 
 void BlockChain::rebuild(std::string const& _path, std::function<void(unsigned, unsigned)> const& _progress, bool _prepPoW)

libethereum/BlockChain.h

@@ -106,8 +106,8 @@ public:
 	BlockChain(bytes const& _genesisBlock, StateDefinition const& _genesisState, std::string const& _path, WithExisting _we = WithExisting::Trust, ProgressCallback const& _p = ProgressCallback());
 	~BlockChain();
 
-	/// Attempt a database re-open.
-	void reopen(std::string const& _path, WithExisting _we = WithExisting::Trust) { close(); open(_path, _we); }
+	/// Reopen everything.
+	virtual void reopen(std::string const& _path, WithExisting _we = WithExisting::Trust, ProgressCallback const& _pc = ProgressCallback()) { close(); open(m_genesisBlock, m_genesisState, _path, _we, _pc); }
 
 	/// (Potentially) renders invalid existing bytesConstRef returned by lastBlock.
 	/// To be called from main loop every 100ms or so.
@@ -291,7 +291,11 @@ public:
 protected:
 	static h256 chunkId(unsigned _level, unsigned _index) { return h256(_index * 0xff + _level); }
 
-	unsigned open(std::string const& _path, WithExisting _we = WithExisting::Trust);
+	/// Initialise everything and open the database.
+	void open(bytes const& _genesisBlock, std::unordered_map<Address, Account> const& _genesisState, std::string const& _path, WithExisting _we, ProgressCallback const& _p);
+	/// Open the database.
+	unsigned openDatabase(std::string const& _path, WithExisting _we = WithExisting::Trust);
+	/// Finalise everything and close the database.
 	void close();
 
 	template<class T, class K, unsigned N> T queryExtras(K const& _h, std::unordered_map<K, T>& _m, boost::shared_mutex& _x, T const& _n, ldb::DB* _extrasDB = nullptr) const

libethereum/CanonBlockChain.cpp

@@ -38,16 +38,23 @@ using namespace dev;
 using namespace dev::eth;
 namespace js = json_spirit;
 
-std::unique_ptr<Ethash::BlockHeader> CanonBlockChain<Ethash>::s_genesis;
+unique_ptr<Ethash::BlockHeader> CanonBlockChain<Ethash>::s_genesis;
 boost::shared_mutex CanonBlockChain<Ethash>::x_genesis;
 Nonce CanonBlockChain<Ethash>::s_nonce(u64(42));
-std::string CanonBlockChain<Ethash>::s_genesisStateJSON;
+string CanonBlockChain<Ethash>::s_genesisStateJSON;
+bytes CanonBlockChain<Ethash>::s_genesisExtraData;
 
 CanonBlockChain<Ethash>::CanonBlockChain(std::string const& _path, WithExisting _we, ProgressCallback const& _pc):
 	FullBlockChain<Ethash>(createGenesisBlock(), createGenesisState(), _path, _we, _pc)
 {
 }
 
+void CanonBlockChain<Ethash>::reopen(std::string const& _path, WithExisting _we, ProgressCallback const& _pc)
+{
+	close();
+	open(createGenesisBlock(), createGenesisState(), _path, _we, _pc);
+}
+
 bytes CanonBlockChain<Ethash>::createGenesisBlock()
 {
 	RLPStream block(3);
@@ -87,7 +94,7 @@ bytes CanonBlockChain<Ethash>::createGenesisBlock()
 			<< gasLimit
 			<< 0	// gasUsed
 			<< timestamp
-			<< extraData
+			<< (s_genesisExtraData.empty() ? extraData : s_genesisExtraData)
 			<< mixHash
 			<< nonce;
 	block.appendRaw(RLPEmptyList);
@@ -108,7 +115,9 @@ unordered_map<Address, Account> CanonBlockChain<Ethash>::createGenesisState()
 			u256 balance;
 			if (account.second.get_obj().count("wei"))
 				balance = u256(account.second.get_obj()["wei"].get_str());
-			else
+			else if (account.second.get_obj().count("balance"))
+				balance = u256(account.second.get_obj()["balance"].get_str());
+			else if (account.second.get_obj().count("finney"))
 				balance = u256(account.second.get_obj()["finney"].get_str()) * finney;
 			if (account.second.get_obj().count("code"))
 			{
@@ -129,6 +138,13 @@ void CanonBlockChain<Ethash>::setGenesis(std::string const& _json)
 	s_genesis.reset();
 }
 
+void CanonBlockChain<Ethash>::forceGenesisExtraData(bytes const& _genesisExtraData)
+{
+	WriteGuard l(x_genesis);
+	s_genesisExtraData = _genesisExtraData;
+	s_genesis.reset();
+}
+
 Ethash::BlockHeader const& CanonBlockChain<Ethash>::genesis()
 {
 	UpgradableGuard l(x_genesis);

libethereum/CanonBlockChain.h

@@ -78,6 +78,9 @@ public:
 	CanonBlockChain(std::string const& _path, WithExisting _we = WithExisting::Trust, ProgressCallback const& _pc = ProgressCallback());
 	~CanonBlockChain() {}
 
+	/// Reopen everything.
+	virtual void reopen(std::string const& _path, WithExisting _we = WithExisting::Trust, ProgressCallback const& _pc = ProgressCallback());
+
 	/// @returns the genesis block header.
 	static Ethash::BlockHeader const& genesis();
 
@@ -90,12 +93,12 @@ public:
 	static std::unordered_map<Address, Account> createGenesisState();
 
 	/// Alter all the genesis block's state by giving a JSON string with account details.
-	/// @TODO implement.
 	/// @warning Unless you're very careful, make sure you call this right at the start of the
 	/// program, before anything has had the chance to use this class at all.
 	static void setGenesis(std::string const& _genesisInfoJSON);
 
-	// TODO: setGenesisTimestamp, ...ExtraData, ...Difficulty, ...GasLimit,
+	/// Override the genesis block's extraData field.
+	static void forceGenesisExtraData(bytes const& _genesisExtraData);
 
 private:
 	/// Static genesis info and its lock.
@@ -103,6 +106,7 @@ private:
 	static std::unique_ptr<Ethash::BlockHeader> s_genesis;
 	static Nonce s_nonce;
 	static std::string s_genesisStateJSON;
+	static bytes s_genesisExtraData;
 };
 
 }

libethereum/Client.cpp

@@ -327,7 +327,7 @@ void Client::doneWorking()
 	}
 }
 
-void Client::killChain()
+void Client::reopenChain(WithExisting _we)
 {
 	bool wasMining = isMining();
 	if (wasMining)
@@ -348,8 +348,8 @@ void Client::killChain()
 		m_working = State();
 
 		m_stateDB = OverlayDB();
-		m_stateDB = State::openDB(Defaults::dbPath(), bc().genesisHash(), WithExisting::Kill);
-		bc().reopen(Defaults::dbPath(), WithExisting::Kill);
+		bc().reopen(Defaults::dbPath(), _we);
+		m_stateDB = State::openDB(Defaults::dbPath(), bc().genesisHash(), _we);
 
 		m_preMine = bc().genesisState(m_stateDB);
 		m_postMine = m_preMine;

libethereum/Client.h

@@ -176,7 +176,9 @@ public:
 	/// Clears pending transactions. Just for debug use.
 	void clearPending();
 	/// Kills the blockchain. Just for debug use.
-	void killChain();
+	void killChain() { reopenChain(WithExisting::Kill); }
+	/// Reloads the blockchain. Just for debug use.
+	void reopenChain(WithExisting _we = WithExisting::Trust);
 	/// Retries all blocks with unknown parents.
 	void retryUnknown() { m_bq.retryAllUnknown(); }
 	/// Get a report of activity.