filters using blockHashes instead of blockNumbers

libethcore/Common.h

@@ -77,6 +77,10 @@ using BlockNumber = unsigned;
 
 static const BlockNumber LatestBlock = (BlockNumber)-2;
 static const BlockNumber PendingBlock = (BlockNumber)-1;
+static const h256 LatestBlockHash = h256(2);
+static const h256 EarliestBlockHash = h256(1);
+static const h256 PendingBlockHash = h256(0);
+
 
 enum class RelativeBlock: BlockNumber
 {

libethereum/Client.cpp

@@ -337,7 +337,7 @@ void Client::appendFromNewPending(TransactionReceipt const& _receipt, h256Hash&
 {
 	Guard l(x_filtersWatches);
 	for (pair<h256 const, InstalledFilter>& i: m_filters)
-		if (i.second.filter.envelops(RelativeBlock::Pending, m_bc.number() + 1))
+		if (isInBlockHashRange(i.second.filter.earliest(), i.second.filter.latest(), PendingBlockHash))
 		{
 			// acceptable number.
 			auto m = i.second.filter.matches(_receipt);
@@ -359,7 +359,7 @@ void Client::appendFromNewBlock(h256 const& _block, h256Hash& io_changed)
 
 	Guard l(x_filtersWatches);
 	for (pair<h256 const, InstalledFilter>& i: m_filters)
-		if (i.second.filter.envelops(RelativeBlock::Latest, d.number) && i.second.filter.matches(d.logBloom))
+		if (isInBlockHashRange(i.second.filter.earliest(), i.second.filter.latest(), d.hash()) && i.second.filter.matches(d.logBloom))
 			// acceptable number & looks like block may contain a matching log entry.
 			for (size_t j = 0; j < br.receipts.size(); j++)
 			{

libethereum/ClientBase.cpp

@@ -171,8 +171,8 @@ LocalisedLogEntries ClientBase::logs(unsigned _watchId) const
 LocalisedLogEntries ClientBase::logs(LogFilter const& _f) const
 {
 	LocalisedLogEntries ret;
-	unsigned begin = min<unsigned>(bc().number() + 1, (unsigned)_f.latest());
-	unsigned end = min(bc().number(), min(begin, (unsigned)_f.earliest()));
+	unsigned begin = min<unsigned>(bc().number() + 1, (unsigned)numberFromHash(_f.latest()));
+	unsigned end = min(bc().number(), min(begin, (unsigned)numberFromHash(_f.earliest())));
 	
 	// Handle pending transactions differently as they're not on the block chain.
 	if (begin > bc().number())
@@ -442,6 +442,31 @@ h256 ClientBase::hashFromNumber(BlockNumber _number) const
 
 BlockNumber ClientBase::numberFromHash(h256 _blockHash) const
 {
+	if (_blockHash == PendingBlockHash)
+		_blockHash = hashFromNumber(PendingBlock);
+	else if (_blockHash == LatestBlockHash)
+		_blockHash = hashFromNumber(LatestBlock);
+	else if (_blockHash == EarliestBlockHash)
+		_blockHash = hashFromNumber(0);
 	return bc().number(_blockHash);
 }
 
+int ClientBase::compareBlockHashes(h256 _h1, h256 _h2) const
+{
+	BlockNumber n1 = numberFromHash(_h1);
+	BlockNumber n2 = numberFromHash(_h2);
+
+	if (n1 > n2) {
+		return 1;
+	} else if (n1 == n2) {
+		return 0;
+	}
+	return -1;
+}
+
+bool ClientBase::isInBlockHashRange(h256 _from, h256 _to, h256 _q) const
+{
+	int c1 = compareBlockHashes(_from, _q);
+	int c2 = compareBlockHashes(_q, _to);
+	return (c1 == 0 || c1 == -1) && (c2 == 0 || c2 == -1);
+}

libethereum/ClientBase.h

@@ -117,6 +117,8 @@ public:
 
 	virtual h256 hashFromNumber(BlockNumber _number) const override;
 	virtual BlockNumber numberFromHash(h256 _blockHash) const override;
+	virtual int compareBlockHashes(h256 _h1, h256 _h2) const override;
+	virtual bool isInBlockHashRange(h256 _from, h256 _to, h256 _q) const override;
 	virtual BlockInfo blockInfo(h256 _hash) const override;
 	virtual BlockDetails blockDetails(h256 _hash) const override;
 	virtual Transaction transaction(h256 _transactionHash) const override;

libethereum/Interface.h

@@ -137,6 +137,8 @@ public:
 	virtual std::pair<h256, unsigned> transactionLocation(h256 const& _transactionHash) const = 0;
 	virtual h256 hashFromNumber(BlockNumber _number) const = 0;
 	virtual BlockNumber numberFromHash(h256 _blockHash) const = 0;
+	virtual int compareBlockHashes(h256 _h1, h256 _h2) const = 0;
+	virtual bool isInBlockHashRange(h256 _from, h256 _to, h256 _q) const = 0;
 
 	virtual BlockInfo blockInfo(h256 _hash) const = 0;
 	virtual BlockDetails blockDetails(h256 _hash) const = 0;

libethereum/LogFilter.cpp

@@ -46,33 +46,6 @@ h256 LogFilter::sha3() const
 	return dev::sha3(s.out());
 }
 
-static bool isNoLater(RelativeBlock _logBlockRelation, u256 _logBlockNumber, unsigned _latest)
-{
-	if (_latest == PendingBlock)
-		return true;
-	else if (_latest == LatestBlock)
-		return _logBlockRelation == RelativeBlock::Latest;
-	else
-		return _logBlockNumber <= _latest;
-}
-
-static bool isNoEarlier(RelativeBlock _logBlockRelation, u256 _logBlockNumber, unsigned _earliest)
-{
-	if (_earliest == PendingBlock)
-		return _logBlockRelation == RelativeBlock::Pending;
-	else if (_earliest == LatestBlock)
-		return true;
-	else
-		return _logBlockNumber >= _earliest;
-}
-
-bool LogFilter::envelops(RelativeBlock _logBlockRelation, u256 _logBlockNumber) const
-{
-	return
-		isNoLater(_logBlockRelation, _logBlockNumber, m_latest) &&
-		isNoEarlier(_logBlockRelation, _logBlockNumber, m_earliest);
-}
-
 bool LogFilter::matches(LogBloom _bloom) const
 {
 	if (m_addresses.size())

libethereum/LogFilter.h

@@ -45,15 +45,14 @@ class State;
 class LogFilter
 {
 public:
-	LogFilter(unsigned _earliest = 0, unsigned _latest = PendingBlock): m_earliest(_earliest), m_latest(_latest) {}
+	LogFilter(h256 _earliest = EarliestBlockHash, h256 _latest = PendingBlockHash): m_earliest(_earliest), m_latest(_latest) {}
 
 	void streamRLP(RLPStream& _s) const;
 	h256 sha3() const;
 
-	unsigned earliest() const { return m_earliest; }
-	unsigned latest() const { return m_latest; }
+	h256 earliest() const { return m_earliest; }
+	h256 latest() const { return m_latest; }
 
-	bool envelops(RelativeBlock _logBlockRelation, u256 _logBlockNumber) const;
 	std::vector<LogBloom> bloomPossibilities() const;
 	bool matches(LogBloom _bloom) const;
 	bool matches(State const& _s, unsigned _i) const;
@@ -61,16 +60,16 @@ public:
 
 	LogFilter address(Address _a) { m_addresses.insert(_a); return *this; }
 	LogFilter topic(unsigned _index, h256 const& _t) { if (_index < 4) m_topics[_index].insert(_t); return *this; }
-	LogFilter withEarliest(int _e) { m_earliest = _e; return *this; }
-	LogFilter withLatest(int _e) { m_latest = _e; return *this; }
+	LogFilter withEarliest(h256 _e) { m_earliest = _e; return *this; }
+	LogFilter withLatest(h256 _e) { m_latest = _e; return *this; }
 
 	friend std::ostream& dev::eth::operator<<(std::ostream& _out, dev::eth::LogFilter const& _s);
 
 private:
 	AddressHash m_addresses;
 	std::array<h256Hash, 4> m_topics;
-	unsigned m_earliest = 0;
-	unsigned m_latest = LatestBlock;
+	h256 m_earliest = EarliestBlockHash;
+	h256 m_latest = PendingBlockHash;
 };
 
 }

libweb3jsonrpc/WebThreeStubServerBase.cpp

@@ -201,9 +201,9 @@ static dev::eth::LogFilter toLogFilter(Json::Value const& _json)	// commented to
 
 	// check only !empty. it should throw exceptions if input params are incorrect
 	if (!_json["fromBlock"].empty())
-		filter.withEarliest(jsToBlockNumber(_json["fromBlock"].asString()));
+		filter.withEarliest(jsToFixed<32>(_json["fromBlock"].asString()));
 	if (!_json["toBlock"].empty())
-		filter.withLatest(jsToBlockNumber(_json["toBlock"].asString()));
+		filter.withLatest(jsToFixed<32>(_json["toBlock"].asString()));
 	if (!_json["address"].empty())
 	{
 		if (_json["address"].isArray())

mix/MixClient.cpp

@@ -251,7 +251,7 @@ void MixClient::executeTransaction(Transaction const& _t, State& _state, bool _c
 		h256Set changed;
 		Guard l(x_filtersWatches);
 		for (std::pair<h256 const, eth::InstalledFilter>& i: m_filters)
-			if ((unsigned)i.second.filter.latest() > bc().number())
+			if (compareBlockHashes(i.second.filter.latest(), bc().currentHash()) > 0)
 			{
 				// acceptable number.
 				auto m = i.second.filter.matches(_state.receipt(_state.pending().size() - 1));