BF size changed

libwhisper/Common.h

@@ -54,11 +54,11 @@ enum WhisperPacket
 {
 	StatusPacket = 0,
 	MessagesPacket,
-	UpdateTopicFilterPacket,
+	TopicFilterPacket,
 	PacketCount
 };
 
-enum { TopicBloomFilterSize = 8 };
+enum { TopicBloomFilterSize = 64 };
 
 using AbridgedTopic = FixedHash<4>;
 using Topic = h256;

libwhisper/WhisperHost.cpp

@@ -85,10 +85,10 @@ void WhisperHost::inject(Envelope const& _m, WhisperPeer* _p)
 	}
 }
 
-void WhisperHost::advertizeTopicsOfInterest()
+void WhisperHost::advertiseTopicsOfInterest()
 {
 	for (auto i: peerSessions())
-		i.first->cap<WhisperPeer>().get()->advertizeTopicsOfInterest();
+		i.first->cap<WhisperPeer>().get()->advertiseTopicsOfInterest();
 }
 
 void WhisperHost::noteChanged(h256 _messageHash, h256 _filter)
@@ -120,7 +120,7 @@ unsigned WhisperHost::installWatch(shh::Topics const& _t)
 		m_filters.insert(make_pair(h, f));
 
 	m_bloom.addRaw(f.filter.exportBloom());
-	advertizeTopicsOfInterest();
+	advertiseTopicsOfInterest();
 
 	return installWatchOnId(h);
 }
@@ -165,7 +165,7 @@ void WhisperHost::uninstallWatch(unsigned _i)
 			m_filters.erase(fit);
 
 		m_bloom.removeRaw(fit->second.filter.exportBloom());
-		advertizeTopicsOfInterest();
+		advertiseTopicsOfInterest();
 	}
 }
 

libwhisper/WhisperHost.h

@@ -74,7 +74,7 @@ private:
 
 	void streamMessage(h256 _m, RLPStream& _s) const;
 	void noteChanged(h256 _messageHash, h256 _filter);
-	void advertizeTopicsOfInterest();
+	void advertiseTopicsOfInterest();
 
 	mutable dev::SharedMutex x_messages;
 	std::map<h256, Envelope> m_messages;

libwhisper/WhisperPeer.cpp

@@ -63,7 +63,7 @@ bool WhisperPeer::interpret(unsigned _id, RLP const& _r)
 		{
 			if (_r.itemCount() > 1) // for backwards compatibility
 				m_bloom = (FixedHash<TopicBloomFilterSize>)_r[1];
-			advertizeTopicsOfInterest();
+			advertiseTopicsOfInterest();
 		}
 
 		for (auto const& m: host()->all())
@@ -73,7 +73,7 @@ bool WhisperPeer::interpret(unsigned _id, RLP const& _r)
 			sendMessages();
 		break;
 	}
-	case UpdateTopicFilterPacket:
+	case TopicFilterPacket:
 	{
 		m_bloom = (FixedHash<TopicBloomFilterSize>)_r[0];
 		break;
@@ -119,10 +119,10 @@ void WhisperPeer::noteNewMessage(h256 _h, Envelope const& _m)
 	m_unseen.insert(make_pair(rating(_m), _h));
 }
 
-void WhisperPeer::advertizeTopicsOfInterest()
+void WhisperPeer::advertiseTopicsOfInterest()
 {
 	RLPStream s;
-	prep(s, UpdateTopicFilterPacket, 1);
+	prep(s, TopicFilterPacket, 1);
 	s << host()->bloom();
 	sealAndSend(s);
 }

libwhisper/WhisperPeer.h

@@ -56,7 +56,7 @@ public:
 	static u256 version() { return 2; }
 	static unsigned messageCount() { return PacketCount; }
 	FixedHash<TopicBloomFilterSize> const& bloom() const { return m_bloom; }	
-	void advertizeTopicsOfInterest(); ///< sends our bloom filter to remote peer
+	void advertiseTopicsOfInterest(); ///< sends our bloom filter to remote peer
 
 private:
 	virtual bool interpret(unsigned _id, RLP const&) override;

test/libwhisper/bloomFilter.cpp

@@ -28,8 +28,7 @@ using namespace dev;
 using namespace dev::shh;
 
 using TopicBloomFilterShort = TopicBloomFilterBase<4>;
-using TopicBloomFilterLong = TopicBloomFilterBase<8>;
+using TopicBloomFilterTest = TopicBloomFilterBase<TopicBloomFilterSize>;
-using TopicBloomFilterTest = TopicBloomFilterLong;
 
 void testAddNonExisting(TopicBloomFilterShort& _f, AbridgedTopic const& _h)
 {
@@ -59,7 +58,7 @@ void testRemoveExistingBloom(TopicBloomFilterShort& _f, AbridgedTopic const& _h)
 	BOOST_REQUIRE(!_f.containsBloom(_h));
 }
 
-int calculateExpected(TopicBloomFilterTest const& f, int const n)
+double calculateExpected(TopicBloomFilterTest const& f, int const n)
 {
 	int const m = f.size * 8; // number of bits in the bloom
 	int const k = f.BitsPerBloom; // number of hash functions (e.g. bits set to 1 in every bloom)
@@ -77,10 +76,10 @@ int calculateExpected(TopicBloomFilterTest const& f, int const n)
 	for (int i = 0; i < k; ++i)
 		kBitsSet *= single;
 
-	return static_cast<int>(kBitsSet * 100 + 0.5); // in percents, rounded up
+	return kBitsSet;
 }
 
-void testFalsePositiveRate(TopicBloomFilterTest const& f, int const inserted, Topic& x)
+double testFalsePositiveRate(TopicBloomFilterTest const& f, int const inserted, Topic& x)
 {
 	int const c_sampleSize = 1000;
 	int falsePositive = 0;
@@ -93,12 +92,14 @@ void testFalsePositiveRate(TopicBloomFilterTest const& f, int const inserted, To
 			++falsePositive;
 	}
 
-	falsePositive /= (c_sampleSize / 100); // in percents
+	double res = double(falsePositive) / double(c_sampleSize);
-	int expected = calculateExpected(f, inserted);
-	int allowed = expected + (expected / 5); // allow deviations ~20%
 
-	//cnote << "Inserted: " << inserted << ", False Positive Rate: " << falsePositive << ", Expected: " << expected;
+	double expected = calculateExpected(f, inserted);
-	BOOST_REQUIRE(falsePositive <= allowed);
+	double allowed = expected * 1.2 + 0.05; // allow deviations ~25%
+
+	//cnote << "Inserted: " << inserted << ", False Positive Rate: " << res << ", Expected: " << expected;
+	BOOST_REQUIRE(res <= allowed);
+	return expected;
 }
 
 BOOST_AUTO_TEST_SUITE(bloomFilter)
@@ -111,11 +112,13 @@ BOOST_AUTO_TEST_CASE(falsePositiveRate)
 	TopicBloomFilterTest f;
 	Topic x(0xC0DEFEED); // deterministic pseudorandom value
 
-	for (int i = 1; i < 21; ++i)
+	double expectedRate = 0;
+
+	for (int i = 1; i < 50 && expectedRate < 0.5; ++i)
 	{
 		x = sha3(x);
 		f.addBloom(AbridgedTopic(x));
-		testFalsePositiveRate(f, i, x);
+		expectedRate = testFalsePositiveRate(f, i, x);
 	}
 }