Fix dejavu week 1, issue 1.

Reenable bits of ethash.

libdevcore/CommonIO.cpp

@@ -111,11 +111,13 @@ void dev::writeFile(std::string const& _file, bytesConstRef _data, bool _writeDe
 		// create directory if not existent
 		fs::path p(_file);
 		fs::create_directories(p.parent_path());
+		fs::permissions(p.parent_path(), fs::owner_all);
 
 		ofstream s(_file, ios::trunc | ios::binary);
 		s.write(reinterpret_cast<char const*>(_data.data()), _data.size());
 		if (!s)
 			BOOST_THROW_EXCEPTION(FileError() << errinfo_comment("Could not write to file: " + _file));
+		fs::permissions(_file, fs::owner_read|fs::owner_write);
 	}
 }
 

libethereum/BlockChain.cpp

@@ -669,14 +669,12 @@ ImportRoute BlockChain::import(VerifiedBlockRef const& _block, OverlayDB const&
 
 		clog(BlockChainNote) << "   Imported and best" << td << " (#" << _block.info.number() << "). Has" << (details(_block.info.parentHash()).children.size() - 1) << "siblings. Route:" << route;
 
-#if ETH_USING_ETHASH
 		StructuredLogger::chainNewHead(
-			_block.info.headerHash(WithoutProof).abridged(),
+			_block.info.hashWithout().abridged(),
-			_block.info.proof.nonce.abridged(),
+			"",//_block.info.proof.nonce.abridged(),
 			currentHash().abridged(),
 			_block.info.parentHash().abridged()
 		);
-#endif
 	}
 	else
 	{

libethereum/Client.h

@@ -380,6 +380,7 @@ public:
 
 	/// Update to the latest transactions and get hash of the current block to be mined minus the
 	/// nonce (the 'work hash') and the difficulty to be met.
+	/// @returns Tuple of target boundary, hash without seal, seed hash.
 	virtual std::tuple<h256, h256, h256> getEthashWork() override;
 
 	/** @brief Submit the proof for the proof-of-work.

libweb3jsonrpc/WebThreeStubServerBase.cpp

@@ -748,12 +748,10 @@ Json::Value WebThreeStubServerBase::eth_getLogsEx(Json::Value const& _json)
 Json::Value WebThreeStubServerBase::eth_getWork()
 {
 	Json::Value ret(Json::arrayValue);
-#if ETH_USING_ETHASH
+	auto r = client()->getEthashWork();
-	auto r = client()->getWork();
+	ret.append(toJS(get<0>(r)));
-	ret.append(toJS(r.headerHash));
+	ret.append(toJS(get<1>(r)));
-	ret.append(toJS(r.seedHash));
+	ret.append(toJS(get<2>(r)));
-	ret.append(toJS(r.boundary));
-#endif
 	return ret;
 }
 
@@ -761,13 +759,7 @@ bool WebThreeStubServerBase::eth_submitWork(string const& _nonce, string const&,
 {
 	try
 	{
-#if ETH_USING_ETHASH
+		return client()->submitEthashWork(jsToFixed<32>(_mixHash), jsToFixed<Nonce::size>(_nonce));
-		return client()->submitWork(Ethash::Solution{jsToFixed<Nonce::size>(_nonce), jsToFixed<32>(_mixHash)});
-#else
-		(void)_nonce;
-		(void)_mixHash;
-		return false;
-#endif
 	}
 	catch (...)
 	{