web3, web3.eth, web3.shh for the JS API.

Following up on Whisper for the dream C++ API.
Crpyto stubs in ready for Alex.
stdserv.js updated to latest.

exp/main.cpp

@@ -104,14 +104,14 @@ int main(int argc, char** argv)
 		ph.connect(remoteHost, remotePort);
 
 	/// Only interested in the packet if the lowest bit is 1
-	auto w = wh->installWatch(MessageFilter(TopicMasks({{Topic("0000000000000000000000000000000000000000000000000000000000000001"), Topic("0000000000000000000000000000000000000000000000000000000000000001")}})));
+	auto w = wh->installWatch(TopicFilter(TopicMasks({{Topic("0000000000000000000000000000000000000000000000000000000000000001"), Topic("0000000000000000000000000000000000000000000000000000000000000001")}})));
 
 	for (int i = 0; ; ++i)
 	{
-		wh->sendRaw(RLPStream().append(i * i).out(), Topic(u256(i)), 1000);
+		wh->sendRaw(RLPStream().append(i * i).out(), Topic(u256(i)));
 		for (auto i: wh->checkWatch(w))
 		{
-			auto p = wh->message(i).payload;
+			auto p = wh->envelope(i).open().payload();
 			cnote << "New message:" << RLP(p).toInt<unsigned>();
 		}
 	}

libdevcore/FixedHash.h

@@ -158,6 +158,21 @@ public:
 		return ret;
 	}
 
+	/// Returns the index of the first bit set to one, or size() * 8 if no bits are set.
+	inline unsigned firstBitSet() const
+	{
+		unsigned ret = 0;
+		for (auto d: m_data)
+			if (d)
+				for (;; ++ret, d <<= 1)
+					if (d & 0x80)
+						return ret;
+					else {}
+			else
+				ret += 8;
+		return ret;
+	}
+
 private:
 	std::array<byte, N> m_data;		///< The binary data.
 };
@@ -193,6 +208,7 @@ inline std::ostream& operator<<(std::ostream& _out, FixedHash<N> const& _h)
 }
 
 // Common types of FixedHash.
+using h520 = FixedHash<65>;
 using h512 = FixedHash<64>;
 using h256 = FixedHash<32>;
 using h160 = FixedHash<20>;

libdevcrypto/Common.cpp

@@ -108,3 +108,64 @@ KeyPair KeyPair::fromEncryptedSeed(bytesConstRef _seed, std::string const& _pass
 	return KeyPair(sha3(aesDecrypt(_seed, _password)));
 }
 
+void dev::encrypt(Public _k, bytesConstRef _plain, bytes& _cipher)
+{
+	(void)_k;
+	_cipher = _plain.toBytes();
+}
+
+bool dev::decrypt(Secret _k, bytesConstRef _cipher, bytes& _plain)
+{
+	(void)_k;
+	_plain = _cipher.toBytes();
+	return true;
+}
+
+Public dev::recover(Signature _sig, h256 _message)
+{
+	secp256k1_start();
+
+	byte pubkey[65];
+	int pubkeylen = 65;
+	if (!secp256k1_ecdsa_recover_compact(_message.data(), 32, _sig.data(), pubkey, &pubkeylen, 0, (int)_sig[64]))
+		return Public();
+
+	// right160(dev::sha3(bytesConstRef(&(pubkey[1]), 64)));
+#if ETH_CRYPTO_TRACE
+	h256* sig = (h256 const*)_sig.data();
+	cout << "---- RECOVER -------------------------------" << endl;
+	cout << "MSG: " << _message << endl;
+	cout << "R S V: " << sig[0] << " " << sig[1] << " " << (int)(_sig[64] - 27) << "+27" << endl;
+	cout << "PUB: " << toHex(bytesConstRef(&(pubkey[1]), 64)) << endl;
+#endif
+
+	return *(Public const*)&(pubkey[1]);
+}
+
+inline h256 kFromMessage(h256 _msg, h256 _priv)
+{
+	return _msg ^ _priv;
+}
+
+Signature dev::sign(Secret _k, h256 _message)
+{
+	int v = 0;
+
+	secp256k1_start();
+
+	SignatureStruct ret;
+	h256 nonce = kFromMessage(_message, _k);
+
+	if (!secp256k1_ecdsa_sign_compact(_message.data(), 32, ret.r.data(), _k.data(), nonce.data(), &v))
+		return Signature();
+#if ETH_ADDRESS_DEBUG
+	cout << "---- SIGN -------------------------------" << endl;
+	cout << "MSG: " << _message << endl;
+	cout << "SEC: " << _k << endl;
+	cout << "NON: " << nonce << endl;
+	cout << "R S V: " << ret.r << " " << ret.s << " " << v << "+27" << endl;
+#endif
+
+	ret.v = v;
+	return *(Signature const*)&ret;
+}

libdevcrypto/Common.h

@@ -37,6 +37,12 @@ using Secret = h256;
 /// @NOTE This is not endian-specific; it's just a bunch of bytes.
 using Public = h512;
 
+/// A signature: 65 bytes: r: [0, 32), s: [32, 64), v: 64.
+/// @NOTE This is not endian-specific; it's just a bunch of bytes.
+using Signature = h520;
+
+struct SignatureStruct { h256 r; h256 s; byte v; };
+
 /// An Ethereum address: 20 bytes.
 /// @NOTE This is not endian-specific; it's just a bunch of bytes.
 using Address = h160;
@@ -44,9 +50,17 @@ using Address = h160;
 /// A vector of Ethereum addresses.
 using Addresses = h160s;
 
-/// Convert a private key into the public key equivalent.
-/// @returns 0 if it's not a valid private key.
-Address toAddress(h256 _private);
+/// A vector of secrets.
+using Secrets = h256s;
+
+/// Convert a secret key into the public key equivalent.
+/// @returns 0 if it's not a valid secret key.
+Address toAddress(Secret _secret);
+
+void encrypt(Public _k, bytesConstRef _plain, bytes& o_cipher);
+bool decrypt(Secret _k, bytesConstRef _cipher, bytes& o_plain);
+Public recover(Signature _sig, h256 _message);
+Signature sign(Secret _k, h256 _message);
 
 /// Simple class that represents a "key pair".
 /// All of the data of the class can be regenerated from the secret key (m_secret) alone.

libethcore/All.h

@@ -3,6 +3,5 @@
 #include "BlockInfo.h"
 #include "CommonEth.h"
 #include "ProofOfWork.h"
-#include "CryptoHeaders.h"
 #include "Exceptions.h"
 

libethereum/Transaction.cpp

@@ -19,9 +19,9 @@
  * @date 2014
  */
 
-#include <secp256k1/secp256k1.h>
 #include <libdevcore/vector_ref.h>
 #include <libdevcore/Log.h>
+#include <libdevcrypto/Common.h>
 #include <libethcore/Exceptions.h>
 #include "Transaction.h"
 using namespace std;
@@ -42,7 +42,7 @@ Transaction::Transaction(bytesConstRef _rlpData, bool _checkSender)
 		receiveAddress = rlp[field = 3].toHash<Address>();
 		value = rlp[field = 4].toInt<u256>();
 		data = rlp[field = 5].toBytes();
-		vrs = Signature{ rlp[field = 6].toInt<byte>(), rlp[field = 7].toInt<u256>(), rlp[field = 8].toInt<u256>() };
+		vrs = SignatureStruct{ rlp[field = 7].toInt<u256>(), rlp[field = 8].toInt<u256>(), byte(rlp[field = 6].toInt<byte>() - 27) };
 		if (_checkSender)
 			m_sender = sender();
 	}
@@ -70,53 +70,18 @@ Address Transaction::sender() const
 {
 	if (!m_sender)
 	{
-		secp256k1_start();
-
-		h256 sig[2] = { vrs.r, vrs.s };
-		h256 msg = sha3(false);
-
-		byte pubkey[65];
-		int pubkeylen = 65;
-		if (!secp256k1_ecdsa_recover_compact(msg.data(), 32, sig[0].data(), pubkey, &pubkeylen, 0, (int)vrs.v - 27))
+		auto p = recover(*(Signature const*)&vrs, sha3(false));
+		if (!p)
 			BOOST_THROW_EXCEPTION(InvalidSignature());
-
-		// TODO: check right160 is correct and shouldn't be left160.
-		m_sender = right160(dev::sha3(bytesConstRef(&(pubkey[1]), 64)));
-
-#if ETH_ADDRESS_DEBUG
-		cout << "---- RECOVER -------------------------------" << endl;
-		cout << "MSG: " << msg << endl;
-		cout << "R S V: " << sig[0] << " " << sig[1] << " " << (int)(vrs.v - 27) << "+27" << endl;
-		cout << "PUB: " << toHex(bytesConstRef(&(pubkey[1]), 64)) << endl;
-		cout << "ADR: " << m_sender << endl;
-#endif
+		m_sender = right160(dev::sha3(bytesConstRef(p.data(), sizeof(p))));
 	}
 	return m_sender;
 }
 
 void Transaction::sign(Secret _priv)
 {
-	int v = 0;
-
-	secp256k1_start();
-
-	h256 msg = sha3(false);
-	h256 sig[2];
-	h256 nonce = kFromMessage(msg, _priv);
-
-	if (!secp256k1_ecdsa_sign_compact(msg.data(), 32, sig[0].data(), _priv.data(), nonce.data(), &v))
-		BOOST_THROW_EXCEPTION(InvalidSignature());
-#if ETH_ADDRESS_DEBUG
-	cout << "---- SIGN -------------------------------" << endl;
-	cout << "MSG: " << msg << endl;
-	cout << "SEC: " << _priv << endl;
-	cout << "NON: " << nonce << endl;
-	cout << "R S V: " << sig[0] << " " << sig[1] << " " << v << "+27" << endl;
-#endif
-
-	vrs.v = (byte)(v + 27);
-	vrs.r = (u256)sig[0];
-	vrs.s = (u256)sig[1];
+	auto sig = dev::sign(_priv, sha3(false));
+	vrs = *(SignatureStruct const*)&sig;
 }
 
 void Transaction::fillStream(RLPStream& _s, bool _sig) const
@@ -129,26 +94,5 @@ void Transaction::fillStream(RLPStream& _s, bool _sig) const
 		_s << "";
 	_s << value << data;
 	if (_sig)
-		_s << vrs.v << vrs.r << vrs.s;
-}
-
-// If the h256 return is an integer, store it in bigendian (i.e. u256 ret; ... return (h256)ret; )
-h256 Transaction::kFromMessage(h256 _msg, h256 _priv)
-{
-	// TODO!
-//	bytes v(32, 1);
-//	bytes k(32, 0);
-	/*
-	v = '\x01' * 32
-	k = '\x00' * 32
-	priv = encode_privkey(priv,'bin')
-	msghash = encode(hash_to_int(msghash),256,32)
-	k = hmac.new(k, v+'\x00'+priv+msghash, hashlib.sha256).digest()
-	v = hmac.new(k, v, hashlib.sha256).digest()
-	k = hmac.new(k, v+'\x01'+priv+msghash, hashlib.sha256).digest()
-	v = hmac.new(k, v, hashlib.sha256).digest()
-	return decode(hmac.new(k, v, hashlib.sha256).digest(),256)
-	*/
-	return _msg ^ _priv;
+		_s << (vrs.v + 27) << (u256)vrs.r << (u256)vrs.s;
 }
-

libethereum/Transaction.h

@@ -30,13 +30,6 @@ namespace dev
 namespace eth
 {
 
-struct Signature
-{
-	byte v;
-	u256 r;
-	u256 s;
-};
-
 struct Transaction
 {
 	Transaction() {}
@@ -54,7 +47,7 @@ struct Transaction
 
 	bytes data;			///< The data associated with the transaction, or the initialiser if it's a creation transaction.
 
-	Signature vrs;		///< The signature of the transaction. Encodes the sender.
+	SignatureStruct vrs;		///< The signature of the transaction. Encodes the sender.
 
 	Address safeSender() const noexcept;	///< Like sender() but will never throw.
 	Address sender() const;					///< Determine the sender of the transaction from the signature (and hash).

libqethereum/QEthereum.cpp

@@ -448,11 +448,10 @@ QString QEthereum::doTransact(QString _json)
 	TransactionSkeleton t = toTransaction(_json);
 	if (!t.from && m_accounts.size())
 	{
-		auto b = m_accounts.begin()->first;
+		u256 b = 0;
 		for (auto a: m_accounts)
-			if (client()->balanceAt(a.first) > client()->balanceAt(b))
-				b = a.first;
-		t.from = b;
+			if (client()->balanceAt(a.first) > b)
+				t.from = a.first, b = client()->balanceAt(a.first);
 	}
 	if (!m_accounts.count(t.from))
 		return QString();
@@ -466,7 +465,7 @@ QString QEthereum::doTransact(QString _json)
 		// TODO: insert validification hook here.
 		client()->transact(m_accounts[t.from].secret(), t.value, t.to, t.data, t.gas, t.gasPrice);
 	else
-		ret = toQJS(client()->transact(t.from, t.value, t.data, t.gas, t.gasPrice));
+		ret = toQJS(client()->transact(m_accounts[t.from].secret(), t.value, t.data, t.gas, t.gasPrice));
 	client()->flushTransactions();
 	return ret;
 }

libqethereum/QEthereum.h

@@ -248,28 +248,30 @@ private:
 };
 
 // TODO: add p2p object
-#define QETH_INSTALL_JS_NAMESPACE(_frame, _env, _dev, _eth, _shh) [_frame, _env, _dev, _eth, _shh]() \
+#define QETH_INSTALL_JS_NAMESPACE(_frame, _env, _web3, _eth, _shh) [_frame, _env, _web3, _eth, _shh]() \
 { \
 	_frame->disconnect(); \
 	_frame->addToJavaScriptWindowObject("env", _env, QWebFrame::QtOwnership); \
-	_frame->addToJavaScriptWindowObject("dev", _dev, QWebFrame::ScriptOwnership); \
+	_frame->addToJavaScriptWindowObject("web3", _web3, QWebFrame::ScriptOwnership); \
 	if (_eth) \
 	{ \
-		_frame->addToJavaScriptWindowObject("eth", _eth, QWebFrame::ScriptOwnership); \
-		_frame->evaluateJavaScript("eth.makeWatch = function(a) { var ww = eth.newWatch(a); var ret = { w: ww }; ret.uninstall = function() { eth.killWatch(w); }; ret.changed = function(f) { eth.watchChanged.connect(function(nw) { if (nw == ww) f() }); }; ret.messages = function() { return JSON.parse(eth.watchMessages(this.w)) }; return ret; }"); \
-		_frame->evaluateJavaScript("eth.watch = function(a) { return eth.makeWatch(JSON.stringify(a)) }"); \
-		_frame->evaluateJavaScript("eth.transact = function(a, f) { var r = eth.doTransact(JSON.stringify(a)); if (f) f(r); }"); \
-		_frame->evaluateJavaScript("eth.call = function(a, f) { var ret = eth.doCallJson(JSON.stringify(a)); if (f) f(ret); return ret; }"); \
-		_frame->evaluateJavaScript("eth.messages = function(a) { return JSON.parse(eth.getMessages(JSON.stringify(a))); }"); \
-		_frame->evaluateJavaScript("eth.block = function(a) { return JSON.parse(eth.getBlock(a)); }"); \
-		_frame->evaluateJavaScript("eth.transaction = function(a) { return JSON.parse(eth.getTransaction(a)); }"); \
-		_frame->evaluateJavaScript("eth.uncle = function(a) { return JSON.parse(eth.getUncle(a)); }"); \
+		_frame->addToJavaScriptWindowObject("_web3_dot_eth", _eth, QWebFrame::ScriptOwnership); \
+		_frame->evaluateJavaScript("_web3_dot_eth.makeWatch = function(a) { var ww = _web3_dot_eth.newWatch(a); var ret = { w: ww }; ret.uninstall = function() { _web3_dot_eth.killWatch(w); }; ret.changed = function(f) { _web3_dot_eth.watchChanged.connect(function(nw) { if (nw == ww) f() }); }; ret.messages = function() { return JSON.parse(_web3_dot_eth.watchMessages(this.w)) }; return ret; }"); \
+		_frame->evaluateJavaScript("_web3_dot_eth.watch = function(a) { return _web3_dot_eth.makeWatch(JSON.stringify(a)) }"); \
+		_frame->evaluateJavaScript("_web3_dot_eth.transact = function(a, f) { var r = _web3_dot_eth.doTransact(JSON.stringify(a)); if (f) f(r); }"); \
+		_frame->evaluateJavaScript("_web3_dot_eth.call = function(a, f) { var ret = _web3_dot_eth.doCallJson(JSON.stringify(a)); if (f) f(ret); return ret; }"); \
+		_frame->evaluateJavaScript("_web3_dot_eth.messages = function(a) { return JSON.parse(_web3_dot_eth.getMessages(JSON.stringify(a))); }"); \
+		_frame->evaluateJavaScript("_web3_dot_eth.block = function(a) { return JSON.parse(_web3_dot_eth.getBlock(a)); }"); \
+		_frame->evaluateJavaScript("_web3_dot_eth.transaction = function(a) { return JSON.parse(_web3_dot_eth.getTransaction(a)); }"); \
+		_frame->evaluateJavaScript("_web3_dot_eth.uncle = function(a) { return JSON.parse(_web3_dot_eth.getUncle(a)); }"); \
+		_frame->evaluateJavaScript("web3.eth = _web3_dot_eth"); \
 	} \
 	if (_shh) \
 	{ \
-		_frame->addToJavaScriptWindowObject("shh", _shh, QWebFrame::ScriptOwnership); \
-		_frame->evaluateJavaScript("shh.makeWatch = function(a) { var ww = shh.newWatch(a); var ret = { w: ww }; ret.uninstall = function() { shh.killWatch(w); }; ret.changed = function(f) { shh.watchChanged.connect(function(nw) { if (nw == ww) f() }); }; ret.messages = function() { return JSON.parse(shh.watchMessages(this.w)) }; return ret; }"); \
-		_frame->evaluateJavaScript("shh.watch = function(a) { return shh.makeWatch(JSON.stringify(a)) }"); \
+		_frame->addToJavaScriptWindowObject("_web3_dot_shh", _shh, QWebFrame::ScriptOwnership); \
+		_frame->evaluateJavaScript("_web3_dot_shh.makeWatch = function(a) { var ww = _web3_dot_shh.newWatch(a); var ret = { w: ww }; ret.uninstall = function() { _web3_dot_shh.killWatch(w); }; ret.changed = function(f) { _web3_dot_shh.watchChanged.connect(function(nw) { if (nw == ww) f() }); }; ret.messages = function() { return JSON.parse(_web3_dot_shh.watchMessages(this.w)) }; return ret; }"); \
+		_frame->evaluateJavaScript("_web3_dot_shh.watch = function(a) { return _web3_dot_shh.makeWatch(JSON.stringify(a)) }"); \
+		_frame->evaluateJavaScript("web3.shh = _web3_dot_shh"); \
 	} \
 }
 

libwhisper/Interface.cpp

@@ -34,10 +34,10 @@ using namespace dev::shh;
 #endif
 #define clogS(X) dev::LogOutputStream<X, true>(false) << "| " << std::setw(2) << session()->socketId() << "] "
 
-bool MessageFilter::matches(Message const& _m) const
+bool TopicFilter::matches(Envelope const& _e) const
 {
 	for (TopicMask const& t: m_topicMasks)
-		if (((t.first ^ _m.topic) & t.second) == 0)
+		if (((t.first ^ _e.topic()) & t.second) == 0)
 			return true;
 	return false;
 }

libwhisper/Interface.h

@@ -46,17 +46,17 @@ namespace shh
 using TopicMask = std::pair<Topic, Topic>;
 using TopicMasks = std::vector<TopicMask>;
 
-class MessageFilter
+class TopicFilter
 {
 public:
-	MessageFilter() {}
-	MessageFilter(TopicMasks const& _m): m_topicMasks(_m) {}
-	MessageFilter(RLP const& _r): m_topicMasks((TopicMasks)_r) {}
+	TopicFilter() {}
+	TopicFilter(TopicMasks const& _m): m_topicMasks(_m) {}
+	TopicFilter(RLP const& _r): m_topicMasks((TopicMasks)_r) {}
 
 	void fillStream(RLPStream& _s) const { _s << m_topicMasks; }
 	h256 sha3() const { RLPStream s; fillStream(s); return dev::sha3(s.out()); }
 
-	bool matches(Message const& _m) const;
+	bool matches(Envelope const& _m) const;
 
 private:
 	TopicMasks m_topicMasks;
@@ -64,9 +64,9 @@ private:
 
 struct InstalledFilter
 {
-	InstalledFilter(MessageFilter const& _f): filter(_f) {}
+	InstalledFilter(TopicFilter const& _f): filter(_f) {}
 
-	MessageFilter filter;
+	TopicFilter filter;
 	unsigned refCount = 1;
 };
 
@@ -84,17 +84,20 @@ class Interface
 public:
 	virtual ~Interface() {}
 
-	virtual void inject(Message const& _m, WhisperPeer* _from = nullptr) = 0;
+	virtual void inject(Envelope const& _m, WhisperPeer* _from = nullptr) = 0;
 
-	virtual unsigned installWatch(MessageFilter const& _filter) = 0;
+	virtual unsigned installWatch(TopicFilter const& _filter) = 0;
 	virtual unsigned installWatch(h256 _filterId) = 0;
 	virtual void uninstallWatch(unsigned _watchId) = 0;
 	virtual h256s peekWatch(unsigned _watchId) const = 0;
 	virtual h256s checkWatch(unsigned _watchId) = 0;
 
-	virtual Message message(h256 _m) const = 0;
+	virtual Envelope envelope(h256 _m) const = 0;
 
-	virtual void sendRaw(bytes const& _payload, h256 _topic, unsigned _ttl) = 0;
+	void sendRaw(bytes const& _payload, Topic _topic, unsigned _ttl = 50, unsigned _workToProve = 50) { inject(Message(_payload).seal(_topic, _ttl, _workToProve)); }
+	void sendRaw(Public _to, bytes const& _payload, Topic _topic, unsigned _ttl = 50, unsigned _workToProve = 50) { inject(Message(_payload).seal(_to, _topic, _ttl, _workToProve)); }
+	void sendRaw(Secret _from, bytes const& _payload, Topic _topic, unsigned _ttl = 50, unsigned _workToProve = 50) { inject(Message(_payload).seal(_from, _topic, _ttl, _workToProve)); }
+	void sendRaw(Secret _from, Public _to, bytes const& _payload, Topic _topic, unsigned _ttl = 50, unsigned _workToProve = 50) { inject(Message(_payload).seal(_from, _to, _topic, _ttl, _workToProve)); }
 };
 
 struct WatshhChannel: public dev::LogChannel { static const char* name() { return "shh"; } static const int verbosity = 1; };
@@ -115,7 +118,7 @@ class Watch: public boost::noncopyable
 public:
 	Watch() {}
 	Watch(Whisper& _c, h256 _f): m_c(&_c), m_id(_c.installWatch(_f)) {}
-	Watch(Whisper& _c, MessageFilter const& _tf): m_c(&_c), m_id(_c.installWatch(_tf)) {}
+	Watch(Whisper& _c, TopicFilter const& _tf): m_c(&_c), m_id(_c.installWatch(_tf)) {}
 	~Watch() { if (m_c) m_c->uninstallWatch(m_id); }
 
 	bool check() { return m_c ? m_c->checkWatch(m_id) : false; }

libwhisper/Message.cpp

@@ -25,3 +25,100 @@ using namespace std;
 using namespace dev;
 using namespace dev::p2p;
 using namespace dev::shh;
+
+Message::Message(Envelope const& _e, Secret const& _s)
+{
+	try
+	{
+		bytes b;
+		if (_s)
+			decrypt(_s, &(_e.data()), b);
+		populate(_s ? b : _e.data());
+		m_to = KeyPair(_s).pub();
+	}
+	catch (...)	// Invalid secret? TODO: replace ... with InvalidSecret
+	{
+	}
+}
+
+void Message::populate(bytes const& _data)
+{
+	if (!_data.size())
+		return;
+
+	byte flags = _data[0];
+	if (!!(flags & ContainsSignature) && _data.size() > sizeof(Signature) + 1)	// has a signature
+	{
+		bytesConstRef payload = bytesConstRef(&_data).cropped(sizeof(Signature) + 1);
+		h256 h = sha3(payload);
+		m_from = recover(*(Signature const*)&(_data[1]), h);
+		m_payload = payload.toBytes();
+	}
+	else
+		m_payload = bytesConstRef(&_data).cropped(1).toBytes();
+}
+
+Envelope Message::seal(Secret _from, Topic const& _topic, unsigned _ttl, unsigned _workToProve)
+{
+	Envelope ret(time(0) + _ttl, _ttl, _topic);
+
+	bytes input(1 + m_payload.size());
+	input[0] = 0;
+	memcpy(input.data() + 1, m_payload.data(), m_payload.size());
+
+	if (_from)		// needs a sig
+	{
+		input.resize(1 + m_payload.size() + sizeof(Signature));
+		input[0] |= ContainsSignature;
+		*(Signature*)&(input[1 + m_payload.size()]) = sign(_from, sha3(m_payload));
+	}
+
+	if (m_to)
+		encrypt(m_to, &input, ret.m_data);
+	else
+		swap(ret.m_data, input);
+
+	ret.proveWork(_workToProve);
+	return ret;
+}
+
+Message Envelope::open(Secret const& _s) const
+{
+	return Message(*this, _s);
+}
+
+Message Envelope::open() const
+{
+	return Message(*this);
+}
+
+unsigned Envelope::workProved() const
+{
+	h256 d[2];
+	d[0] = sha3NoNonce();
+	d[1] = m_nonce;
+	return dev::sha3(bytesConstRef(d[0].data(), 64)).firstBitSet();
+}
+
+void Envelope::proveWork(unsigned _ms)
+{
+	// PoW
+	h256 d[2];
+	d[0] = sha3NoNonce();
+	uint32_t& n = *(uint32_t*)&(d[1][30]);
+	unsigned bestBitSet = 0;
+	bytesConstRef chuck(d[0].data(), 64);
+
+	chrono::high_resolution_clock::time_point then = chrono::high_resolution_clock::now() + chrono::milliseconds(_ms);
+	for (n = 0; chrono::high_resolution_clock::now() < then; )
+		// do it rounds of 1024 for efficiency
+		for (unsigned i = 0; i < 1024; ++i, ++n)
+		{
+			auto fbs = dev::sha3(chuck).firstBitSet();
+			if (fbs > bestBitSet)
+			{
+				bestBitSet = fbs;
+				m_nonce = n;
+			}
+		}
+}

libwhisper/Message.h

@@ -36,27 +36,88 @@ namespace dev
 namespace shh
 {
 
-struct Message
+class Message;
+
+class Envelope
 {
-	unsigned expiry = 0;
-	unsigned ttl = 0;
-	Topic topic;	// TODO: change to h256
-	bytes payload;
+	friend class Message;
 
-	Message() {}
-	Message(unsigned _exp, unsigned _ttl, Topic const& _topic, bytes const& _payload): expiry(_exp), ttl(_ttl), topic(_topic), payload(_payload) {}
-	Message(RLP const& _m)
+public:
+	Envelope() {}
+	Envelope(RLP const& _m)
 	{
-		expiry = _m[0].toInt<unsigned>();
-		ttl = _m[1].toInt<unsigned>();
-		topic = (Topic)_m[2];
-		payload = _m[3].toBytes();
+		m_expiry = _m[0].toInt<unsigned>();
+		m_ttl = _m[1].toInt<unsigned>();
+		m_topic = (Topic)_m[2];
+		m_data = _m[3].toBytes();
 	}
 
-	operator bool () const { return !!expiry; }
+	operator bool() const { return !!m_expiry; }
+
+	void streamOut(RLPStream& _s, bool _withNonce) const { _s.appendList(_withNonce ? 5 : 4) << m_expiry << m_ttl << m_topic << m_data; if (_withNonce) _s << m_nonce; }
+	h256 sha3() const { RLPStream s; streamOut(s, true); return dev::sha3(s.out()); }
+	h256 sha3NoNonce() const { RLPStream s; streamOut(s, false); return dev::sha3(s.out()); }
+
+	unsigned sent() const { return m_expiry - m_ttl; }
+	unsigned expiry() const { return m_expiry; }
+	unsigned ttl() const { return m_ttl; }
+	Topic const& topic() const { return m_topic; }
+	bytes const& data() const { return m_data; }
+
+	Message open(Secret const& _s) const;
+	Message open() const;
+
+	unsigned workProved() const;
+	void proveWork(unsigned _ms);
+
+private:
+	Envelope(unsigned _exp, unsigned _ttl, Topic const& _topic): m_expiry(_exp), m_ttl(_ttl), m_topic(_topic) {}
+
+	unsigned m_expiry = 0;
+	unsigned m_ttl = 0;
+	u256 m_nonce;
+
+	Topic m_topic;
+	bytes m_data;
+};
+
+enum /*Message Flags*/
+{
+	ContainsSignature = 0
+};
+
+/// An (unencrypted) message, constructed from the combination of an Envelope, and, potentially,
+/// a Secret key to decrypt the Message.
+class Message
+{
+public:
+	Message() {}
+	Message(Envelope const& _e, Secret const& _s = Secret());
+	Message(bytes const& _payload): m_payload(_payload) {}
+	Message(bytesConstRef _payload): m_payload(_payload.toBytes()) {}
+	Message(bytes&& _payload) { std::swap(_payload, m_payload); }
+
+	Public from() const { return m_from; }
+	Public to() const { return m_to; }
+	bytes const& payload() const { return m_payload; }
+
+	void setTo(Public _to) { m_to = _to; }
+
+	operator bool() const { return !!m_payload.size() || m_from || m_to; }
+
+	/// Turn this message into a ditributable Envelope.
+	Envelope seal(Secret _from, Topic const& _topic, unsigned _workToProve = 50, unsigned _ttl = 50);
+	// Overloads for skipping _from or specifying _to.
+	Envelope seal(Topic const& _topic, unsigned _ttl = 50, unsigned _workToProve = 50) { return seal(Secret(), _topic, _workToProve, _ttl); }
+	Envelope seal(Public _to, Topic const& _topic, unsigned _workToProve = 50, unsigned _ttl = 50) { m_to = _to; return seal(Secret(), _topic, _workToProve, _ttl); }
+	Envelope seal(Secret _from, Public _to, Topic const& _topic, unsigned _workToProve = 50, unsigned _ttl = 50) { m_to = _to; return seal(_from, _topic, _workToProve, _ttl); }
+
+private:
+	void populate(bytes const& _data);
 
-	void streamOut(RLPStream& _s) const { _s.appendList(4) << expiry << ttl << topic << payload; }
-	h256 sha3() const { RLPStream s; streamOut(s); return dev::sha3(s.out()); }
+	Public m_from;
+	Public m_to;
+	bytes m_payload;
 };
 
 }

libwhisper/WhisperHost.cpp

@@ -47,11 +47,11 @@ void WhisperHost::streamMessage(h256 _m, RLPStream& _s) const
 	if (m_messages.count(_m))
 	{
 		UpgradeGuard ll(l);
-		m_messages.at(_m).streamOut(_s);
+		m_messages.at(_m).streamOut(_s, true);
 	}
 }
 
-void WhisperHost::inject(Message const& _m, WhisperPeer* _p)
+void WhisperHost::inject(Envelope const& _m, WhisperPeer* _p)
 {
 	auto h = _m.sha3();
 	{
@@ -95,7 +95,7 @@ unsigned WhisperHost::installWatch(h256 _h)
 	return ret;
 }
 
-unsigned WhisperHost::installWatch(shh::MessageFilter const& _f)
+unsigned WhisperHost::installWatch(shh::TopicFilter const& _f)
 {
 	Guard l(m_filterLock);
 

libwhisper/WhisperHost.h

@@ -48,17 +48,15 @@ public:
 
 	unsigned protocolVersion() const { return 0; }
 
-	virtual void inject(Message const& _m, WhisperPeer* _from = nullptr);
+	virtual void inject(Envelope const& _e, WhisperPeer* _from = nullptr);
 
-	virtual unsigned installWatch(MessageFilter const& _filter);
+	virtual unsigned installWatch(TopicFilter const& _filter);
 	virtual unsigned installWatch(h256 _filterId);
 	virtual void uninstallWatch(unsigned _watchId);
 	virtual h256s peekWatch(unsigned _watchId) const { dev::Guard l(m_filterLock); try { return m_watches.at(_watchId).changes; } catch (...) { return h256s(); } }
 	virtual h256s checkWatch(unsigned _watchId) { dev::Guard l(m_filterLock); h256s ret; try { ret = m_watches.at(_watchId).changes; m_watches.at(_watchId).changes.clear(); } catch (...) {} return ret; }
 
-	virtual Message message(h256 _m) const { try { dev::ReadGuard l(x_messages); return m_messages.at(_m); } catch (...) { return Message(); } }
-
-	virtual void sendRaw(bytes const& _payload, Topic _topic, unsigned _ttl) { inject(Message(time(0) + _ttl, _ttl, _topic, _payload)); }
+	virtual Envelope envelope(h256 _m) const { try { dev::ReadGuard l(x_messages); return m_messages.at(_m); } catch (...) { return Envelope(); } }
 
 private:
 	void streamMessage(h256 _m, RLPStream& _s) const;
@@ -66,7 +64,7 @@ private:
 	void noteChanged(h256 _messageHash, h256 _filter);
 
 	mutable dev::SharedMutex x_messages;
-	std::map<h256, Message> m_messages;
+	std::map<h256, Envelope> m_messages;
 
 	mutable dev::Mutex m_filterLock;
 	std::map<h256, InstalledFilter> m_filters;

libwhisper/WhisperPeer.cpp

@@ -71,7 +71,7 @@ bool WhisperPeer::interpret(unsigned _id, RLP const& _r)
 		unsigned n = 0;
 		for (auto i: _r)
 			if (n++)
-				host()->inject(Message(i), this);
+				host()->inject(Envelope(i), this);
 		sendMessages();
 		break;
 	}

stdserv.js

@@ -1,3 +1,5 @@
+eth = web3.eth;
+
 env.note('Creating Config...')
 var configCode = eth.lll("
 {
@@ -277,25 +279,25 @@ eth.transact({ 'to': config, 'data': ['3', exchange] });
 
 
 env.note('Register my name...')
-eth.transact({ 'to': nameReg, 'data': [ eth.fromAscii('register'), eth.fromAscii('Gav') ] });
+eth.transact({ 'to': nameReg, 'data': [ web3.fromAscii('register'), web3.fromAscii('Gav') ] });
 
 env.note('Dole out ETH to other address...')
 eth.transact({ 'value': '100000000000000000000', 'to': eth.accounts[1] });
 
 env.note('Register my other name...')
-eth.transact({ 'from': eth.keys[1], 'to': nameReg, 'data': [ eth.fromAscii('register'), eth.fromAscii("Gav Would") ] });
+eth.transact({ 'from': eth.keys[1], 'to': nameReg, 'data': [ web3.fromAscii('register'), web3.fromAscii("Gav Would") ] });
 
 env.note('Approve Exchange...')
-eth.transact({ 'to': gavCoin, 'data': [ eth.fromAscii('approve'), exchange ] });
+eth.transact({ 'to': gavCoin, 'data': [ web3.fromAscii('approve'), exchange ] });
 
 env.note('Approve Exchange on other address...')
-eth.transact({ 'from': eth.keys[1], 'to': gavCoin, 'data': [ eth.fromAscii('approve'), exchange ] });
+eth.transact({ 'from': eth.keys[1], 'to': gavCoin, 'data': [ web3.fromAscii('approve'), exchange ] });
 
 env.note('Make offer 5000GAV/5ETH...')
-eth.transact({ 'to': exchange, 'data': [eth.fromAscii('new'), gavCoin, '5000', '0', '5000000000000000000'] });
+eth.transact({ 'to': exchange, 'data': [web3.fromAscii('new'), gavCoin, '5000', '0', '5000000000000000000'] });
 
 env.note('Register gav.eth...')
-eth.transact({ 'to': dnsReg, 'data': [eth.fromAscii('register'), eth.fromAscii('gav'), eth.fromAscii('opensecrecy.com')] });
+eth.transact({ 'to': dnsReg, 'data': [web3.fromAscii('register'), web3.fromAscii('gav'), web3.fromAscii('opensecrecy.com')] });
 
 env.note('All done.')