Changed genesis block to reflect root of empty trie as null.

libethereum/BlockInfo.cpp

@@ -42,7 +42,7 @@ bytes BlockInfo::createGenesisBlock()
 {
 	RLPStream block(3);
 	auto sha3EmptyList = sha3(RLPEmptyList);
-	block.appendList(9) << h256() << sha3EmptyList << h160() << sha3(RLPNull) << sha3EmptyList << c_genesisDifficulty << (uint)0 << string() << (uint)0;
+	block.appendList(9) << h256() << sha3EmptyList << h160() << h256() << sha3EmptyList << c_genesisDifficulty << (uint)0 << string() << (uint)0;
 	block.appendRaw(RLPEmptyList);
 	block.appendRaw(RLPEmptyList);
 	return block.out();

libethereum/TrieDB.cpp

@@ -26,4 +26,7 @@ using namespace eth;
 
 namespace eth
 {
+
+const h256 c_shaNull = sha3("");
+
 }

libethereum/TrieDB.h

@@ -94,6 +94,8 @@ private:
 #pragma warning(disable:4100) // disable warnings so it compiles
 #endif
 
+extern const h256 c_shaNull;
+
 /**
  * @brief Merkle Patricia Tree "Trie": a modifed base-16 Radix tree.
  * This version uses an LDB backend
@@ -111,7 +113,7 @@ public:
 	void init();
 	void setRoot(h256 _root) { m_root = _root; }
 
-	h256 root() const { return m_root; }
+	h256 root() const { return m_root == c_shaNull ? h256() : m_root; }	// patch the root in the case of the empty trie. TODO: handle this properly.
 
 	void debugPrint() {}
 

test/main.cpp

@@ -35,11 +35,11 @@ using namespace eth;
 
 int main(int argc, char** argv)
 {
-	/*RLPStream s;
+	RLPStream s;
 	BlockInfo::genesis().fillStream(s, false);
 	std::cout << RLP(s.out()) << std::endl;
 	std::cout << asHex(s.out()) << std::endl;
-	std::cout << sha3(s.out()) << std::endl;*/
+	std::cout << sha3(s.out()) << std::endl;
 
 //	hexPrefixTest();
 //	rlpTest();