PoC-7: Reversion of 0-hashes, empty-list hashes and sha3('') -> ''

MemTrie.cpp

@@ -437,12 +437,12 @@ MemTrie::~MemTrie()
 
 h256 MemTrie::hash256() const
 {
-	return m_root ? m_root->hash256() : h256();
+	return m_root ? m_root->hash256() : sha3(dev::rlp(bytesConstRef()));
 }
 
 bytes MemTrie::rlp() const
 {
-	return m_root ? m_root->rlp() : bytes();
+	return m_root ? m_root->rlp() : dev::rlp(bytesConstRef());
 }
 
 void MemTrie::debugPrint()

TrieHash.cpp

@@ -162,7 +162,7 @@ h256 hash256(StringMap const& _s)
 {
 	// build patricia tree.
 	if (_s.empty())
-		return h256();
+		return sha3(rlp(""));
 	HexMap hexMap;
 	for (auto i = _s.rbegin(); i != _s.rend(); ++i)
 		hexMap[asNibbles(i->first)] = i->second;
@@ -175,7 +175,7 @@ bytes rlp256(StringMap const& _s)
 {
 	// build patricia tree.
 	if (_s.empty())
-		return bytes();
+		return rlp("");
 	HexMap hexMap;
 	for (auto i = _s.rbegin(); i != _s.rend(); ++i)
 		hexMap[asNibbles(i->first)] = i->second;
@@ -188,7 +188,7 @@ h256 hash256(u256Map const& _s)
 {
 	// build patricia tree.
 	if (_s.empty())
-		return h256();
+		return sha3(rlp(""));
 	HexMap hexMap;
 	for (auto i = _s.rbegin(); i != _s.rend(); ++i)
 		hexMap[asNibbles(toBigEndianString(i->first))] = asString(rlp(i->second));

crypto.cpp

@@ -341,6 +341,7 @@ BOOST_AUTO_TEST_CASE(eth_keypairs)
 	{
 		eth::Transaction t;
 		t.nonce = 0;
+		t.type = eth::Transaction::MessageCall;
 		t.receiveAddress = h160(fromHex("944400f4b88ac9589a0f17ed4671da26bddb668b"));
 		t.value = 1000;
 		auto rlp = t.rlp(false);
@@ -369,6 +370,7 @@ int cryptoTest()
 	{
 		eth::Transaction t;
 		t.nonce = 0;
+		t.type = eth::Transaction::MessageCall;
 		t.receiveAddress = h160(fromHex("944400f4b88ac9589a0f17ed4671da26bddb668b"));
 		t.value = 1000;
 		auto rlp = t.rlp(false);
@@ -397,6 +399,7 @@ int cryptoTest()
 	Transaction t;
 	t.nonce = 0;
 	t.value = 1;			// 1 wei.
+	t.type = eth::Transaction::MessageCall;
 	t.receiveAddress = toAddress(sha3("123"));
 
 	bytes sig64 = toBigEndian(t.vrs.r) + toBigEndian(t.vrs.s);

state.cpp

@@ -68,6 +68,7 @@ int stateTest()
 		Transaction t;
 		t.nonce = s.transactionsFrom(myMiner.address());
 		t.value = 1000;			// 1e3 wei.
+		t.type = eth::Transaction::MessageCall;
 		t.receiveAddress = me.address();
 		t.sign(myMiner.secret());
 		assert(t.sender() == myMiner.address());

vm.cpp

@@ -56,14 +56,13 @@ h160 FakeExtVM::create(u256 _endowment, u256* _gas, bytesConstRef _init, OnOpFun
 		get<3>(addresses[ret]) = m_s.code(ret);
 	}
 
-	t.receiveAddress = ret;
+	t.type = eth::Transaction::ContractCreation;
 	callcreates.push_back(t);
 	return ret;
 }
 
 bool FakeExtVM::call(Address _receiveAddress, u256 _value, bytesConstRef _data, u256* _gas, bytesRef _out, OnOpFunc const&, Address _myAddressOverride, Address _codeAddressOverride)
 {
-
 	u256 contractgas = 0xffff;
 
 	Transaction t;
@@ -71,6 +70,7 @@ bool FakeExtVM::call(Address _receiveAddress, u256 _value, bytesConstRef _data,
 	t.gasPrice = gasPrice;
 	t.gas = *_gas;
 	t.data = _data.toVector();
+	t.type = eth::Transaction::MessageCall;
 	t.receiveAddress = _receiveAddress;
 	callcreates.push_back(t);
 
@@ -384,7 +384,7 @@ mArray FakeExtVM::exportCallCreates()
 	for (Transaction const& tx: callcreates)
 	{
 		mObject o;
-		o["destination"] = toString(tx.receiveAddress);
+		o["destination"] = tx.type == Transaction::ContractCreation ? "" : toString(tx.receiveAddress);
 		push(o, "gasLimit", tx.gas);
 		push(o, "value", tx.value);
 		o["data"] = "0x" + toHex(tx.data);
@@ -403,6 +403,7 @@ void FakeExtVM::importCallCreates(mArray& _callcreates)
 		BOOST_REQUIRE(tx.count("destination") > 0);
 		BOOST_REQUIRE(tx.count("gasLimit") > 0);
 		Transaction t;
+		t.type = tx["destination"].get_str().empty() ? Transaction::ContractCreation : Transaction::MessageCall;
 		t.receiveAddress = Address(tx["destination"].get_str());
 		t.value = toInt(tx["value"]);
 		t.gas = toInt(tx["gasLimit"]);