core, eth: clean up bloom filtering, add some tests

core/bloombits/doc.go

@@ -0,0 +1,18 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Package bloombits implements bloom filtering on batches of data.
+package bloombits

core/bloombits/fetcher_test.go

@@ -1,101 +0,0 @@
-// Copyright 2017 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-package bloombits
-
-import (
-	"bytes"
-	"encoding/binary"
-	"math/rand"
-	"sync"
-	"sync/atomic"
-	"testing"
-	"time"
-)
-
-const testFetcherReqCount = 5000
-
-func fetcherTestVector(b uint, s uint64) []byte {
-	r := make([]byte, 10)
-	binary.BigEndian.PutUint16(r[0:2], uint16(b))
-	binary.BigEndian.PutUint64(r[2:10], s)
-	return r
-}
-
-func TestFetcher(t *testing.T) {
-	testFetcher(t, 1)
-}
-
-func TestFetcherMultipleReaders(t *testing.T) {
-	testFetcher(t, 10)
-}
-
-func testFetcher(t *testing.T, cnt int) {
-	f := &fetcher{
-		requestMap: make(map[uint64]fetchRequest),
-	}
-	distCh := make(chan distRequest, channelCap)
-	stop := make(chan struct{})
-	var reqCount uint32
-
-	for i := 0; i < 10; i++ {
-		go func() {
-			for {
-				req, ok := <-distCh
-				if !ok {
-					return
-				}
-				time.Sleep(time.Duration(rand.Intn(100000)))
-				atomic.AddUint32(&reqCount, 1)
-				f.deliver([]uint64{req.sectionIndex}, [][]byte{fetcherTestVector(req.bloomIndex, req.sectionIndex)})
-			}
-		}()
-	}
-
-	var wg, wg2 sync.WaitGroup
-	for cc := 0; cc < cnt; cc++ {
-		wg.Add(1)
-		in := make(chan uint64, channelCap)
-		out := f.fetch(in, distCh, stop, &wg2)
-
-		time.Sleep(time.Millisecond * 10 * time.Duration(cc))
-		go func() {
-			for i := uint64(0); i < testFetcherReqCount; i++ {
-				in <- i
-			}
-		}()
-
-		go func() {
-			for i := uint64(0); i < testFetcherReqCount; i++ {
-				bv := <-out
-				if !bytes.Equal(bv, fetcherTestVector(0, i)) {
-					if len(bv) != 10 {
-						t.Errorf("Vector #%d length is %d, expected 10", i, len(bv))
-					} else {
-						j := binary.BigEndian.Uint64(bv[2:10])
-						t.Errorf("Expected vector #%d, fetched #%d", i, j)
-					}
-				}
-			}
-			wg.Done()
-		}()
-	}
-
-	wg.Wait()
-	close(stop)
-	if reqCount != testFetcherReqCount {
-		t.Errorf("Request count mismatch: expected %v, got %v", testFetcherReqCount, reqCount)
-	}
-}

core/bloombits/generator.go

@@ -0,0 +1,84 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package bloombits
+
+import (
+	"errors"
+
+	"github.com/ethereum/go-ethereum/core/types"
+)
+
+// errSectionOutOfBounds is returned if the user tried to add more bloom filters
+// to the batch than available space, or if tries to retrieve above the capacity,
+var errSectionOutOfBounds = errors.New("section out of bounds")
+
+// Generator takes a number of bloom filters and generates the rotated bloom bits
+// to be used for batched filtering.
+type Generator struct {
+	blooms   [types.BloomBitLength][]byte // Rotated blooms for per-bit matching
+	sections uint                         // Number of sections to batch together
+	nextBit  uint                         // Next bit to set when adding a bloom
+}
+
+// NewGenerator creates a rotated bloom generator that can iteratively fill a
+// batched bloom filter's bits.
+func NewGenerator(sections uint) (*Generator, error) {
+	if sections%8 != 0 {
+		return nil, errors.New("section count not multiple of 8")
+	}
+	b := &Generator{sections: sections}
+	for i := 0; i < types.BloomBitLength; i++ {
+		b.blooms[i] = make([]byte, sections/8)
+	}
+	return b, nil
+}
+
+// AddBloom takes a single bloom filter and sets the corresponding bit column
+// in memory accordingly.
+func (b *Generator) AddBloom(bloom types.Bloom) error {
+	// Make sure we're not adding more bloom filters than our capacity
+	if b.nextBit >= b.sections {
+		return errSectionOutOfBounds
+	}
+	// Rotate the bloom and insert into our collection
+	byteMask := b.nextBit / 8
+	bitMask := byte(1) << byte(7-b.nextBit%8)
+
+	for i := 0; i < types.BloomBitLength; i++ {
+		bloomByteMask := types.BloomByteLength - 1 - i/8
+		bloomBitMask := byte(1) << byte(i%8)
+
+		if (bloom[bloomByteMask] & bloomBitMask) != 0 {
+			b.blooms[i][byteMask] |= bitMask
+		}
+	}
+	b.nextBit++
+
+	return nil
+}
+
+// Bitset returns the bit vector belonging to the given bit index after all
+// blooms have been added.
+func (b *Generator) Bitset(idx uint) ([]byte, error) {
+	if b.nextBit != b.sections {
+		return nil, errors.New("bloom not fully generated yet")
+	}
+	if idx >= b.sections {
+		return nil, errSectionOutOfBounds
+	}
+	return b.blooms[idx], nil
+}

core/bloombits/generator_test.go

@@ -0,0 +1,60 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package bloombits
+
+import (
+	"bytes"
+	"math/rand"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/core/types"
+)
+
+// Tests that batched bloom bits are correctly rotated from the input bloom
+// filters.
+func TestGenerator(t *testing.T) {
+	// Generate the input and the rotated output
+	var input, output [types.BloomBitLength][types.BloomByteLength]byte
+
+	for i := 0; i < types.BloomBitLength; i++ {
+		for j := 0; j < types.BloomBitLength; j++ {
+			bit := byte(rand.Int() % 2)
+
+			input[i][j/8] |= bit << byte(7-j%8)
+			output[types.BloomBitLength-1-j][i/8] |= bit << byte(7-i%8)
+		}
+	}
+	// Crunch the input through the generator and verify the result
+	gen, err := NewGenerator(types.BloomBitLength)
+	if err != nil {
+		t.Fatalf("failed to create bloombit generator: %v", err)
+	}
+	for i, bloom := range input {
+		if err := gen.AddBloom(bloom); err != nil {
+			t.Fatalf("bloom %d: failed to add: %v", i, err)
+		}
+	}
+	for i, want := range output {
+		have, err := gen.Bitset(uint(i))
+		if err != nil {
+			t.Fatalf("output %d: failed to retrieve bits: %v", i, err)
+		}
+		if !bytes.Equal(have, want[:]) {
+			t.Errorf("output %d: bit vector mismatch have %x, want %x", i, have, want)
+		}
+	}
+}

core/bloombits/matcher_test.go

@@ -13,6 +13,7 @@
 //
 // You should have received a copy of the GNU Lesser General Public License
 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
 package bloombits
 
 import (
@@ -20,177 +21,219 @@ import (
 	"sync/atomic"
 	"testing"
 	"time"
-
-	"github.com/ethereum/go-ethereum/core/types"
 )
 
 const testSectionSize = 4096
 
-func matcherTestVector(b uint, s uint64) []byte {
+// Tests the matcher pipeline on a single continuous workflow without interrupts.
-	r := make([]byte, testSectionSize/8)
+func TestMatcherContinuous(t *testing.T) {
-	for i, _ := range r {
+	testMatcherDiffBatches(t, [][]bloomIndexes{{{10, 20, 30}}}, 100000, false, 75)
-		var bb byte
+	testMatcherDiffBatches(t, [][]bloomIndexes{{{32, 3125, 100}}, {{40, 50, 10}}}, 100000, false, 81)
-		for bit := 0; bit < 8; bit++ {
+	testMatcherDiffBatches(t, [][]bloomIndexes{{{4, 8, 11}, {7, 8, 17}}, {{9, 9, 12}, {15, 20, 13}}, {{18, 15, 15}, {12, 10, 4}}}, 10000, false, 36)
-			blockIdx := s*testSectionSize + uint64(i*8+bit)
-			bb += bb
-			if (blockIdx % uint64(b)) == 0 {
-				bb++
-			}
-		}
-		r[i] = bb
-	}
-	return r
 }
 
-func expMatch1(idxs types.BloomIndexList, i uint64) bool {
+// Tests the matcher pipeline on a constantly interrupted and resumed work pattern
-	for _, ii := range idxs {
+// with the aim of ensuring data items are requested only once.
-		if (i % uint64(ii)) != 0 {
+func TestMatcherIntermittent(t *testing.T) {
-			return false
+	testMatcherDiffBatches(t, [][]bloomIndexes{{{10, 20, 30}}}, 100000, true, 75)
-		}
+	testMatcherDiffBatches(t, [][]bloomIndexes{{{32, 3125, 100}}, {{40, 50, 10}}}, 100000, true, 81)
-	}
+	testMatcherDiffBatches(t, [][]bloomIndexes{{{4, 8, 11}, {7, 8, 17}}, {{9, 9, 12}, {15, 20, 13}}, {{18, 15, 15}, {12, 10, 4}}}, 10000, true, 36)
-	return true
 }
 
-func expMatch2(idxs []types.BloomIndexList, i uint64) bool {
+// Tests the matcher pipeline on random input to hopefully catch anomalies.
-	for _, ii := range idxs {
+func TestMatcherRandom(t *testing.T) {
-		if expMatch1(ii, i) {
+	for i := 0; i < 10; i++ {
-			return true
+		testMatcherBothModes(t, makeRandomIndexes([]int{1}, 50), 10000, 0)
-		}
+		testMatcherBothModes(t, makeRandomIndexes([]int{3}, 50), 10000, 0)
+		testMatcherBothModes(t, makeRandomIndexes([]int{2, 2, 2}, 20), 10000, 0)
+		testMatcherBothModes(t, makeRandomIndexes([]int{5, 5, 5}, 50), 10000, 0)
+		testMatcherBothModes(t, makeRandomIndexes([]int{4, 4, 4}, 20), 10000, 0)
 	}
-	return false
 }
 
-func expMatch3(idxs [][]types.BloomIndexList, i uint64) bool {
+// makeRandomIndexes generates a random filter system, composed on multiple filter
-	for _, ii := range idxs {
+// criteria, each having one bloom list component for the address and arbitrarilly
-		if !expMatch2(ii, i) {
+// many topic bloom list components.
-			return false
+func makeRandomIndexes(lengths []int, max int) [][]bloomIndexes {
+	res := make([][]bloomIndexes, len(lengths))
+	for i, topics := range lengths {
+		res[i] = make([]bloomIndexes, topics)
+		for j := 0; j < topics; j++ {
+			for k := 0; k < len(res[i][j]); k++ {
+				res[i][j][k] = uint(rand.Intn(max-1) + 2)
+			}
 		}
 	}
-	return true
+	return res
 }
 
-func testServeMatcher(m *Matcher, stop chan struct{}, cnt *uint32, maxRequestLen int) {
+// testMatcherDiffBatches runs the given matches test in single-delivery and also
-	// serve matcher with test vectors
+// in batches delivery mode, verifying that all kinds of deliveries are handled
-	for i := 0; i < 10; i++ {
+// correctly withn.
-		go func() {
+func testMatcherDiffBatches(t *testing.T, filter [][]bloomIndexes, blocks uint64, intermittent bool, retrievals uint32) {
-			for {
+	singleton := testMatcher(t, filter, blocks, intermittent, retrievals, 1)
-				select {
+	batched := testMatcher(t, filter, blocks, intermittent, retrievals, 16)
-				case <-stop:
+
-					return
+	if singleton != batched {
-				default:
+		t.Errorf("filter = %v blocks = %v intermittent = %v: request count mismatch, %v in signleton vs. %v in batched mode", filter, blocks, intermittent, singleton, batched)
-				}
-				b, ok := m.AllocSectionQueue()
-				if !ok {
-					return
-				}
-				if m.SectionCount(b) < maxRequestLen {
-					time.Sleep(time.Microsecond * 100)
-				}
-				s := m.FetchSections(b, maxRequestLen)
-				res := make([][]byte, len(s))
-				for i, ss := range s {
-					res[i] = matcherTestVector(b, ss)
-					atomic.AddUint32(cnt, 1)
-				}
-				m.Deliver(b, s, res)
-			}
-		}()
 	}
 }
 
-func testMatcher(t *testing.T, idxs [][]types.BloomIndexList, cnt uint64, stopOnMatches bool, expCount uint32) uint32 {
+// testMatcherBothModes runs the given matcher test in both continuous as well as
-	count1 := testMatcherWithReqCount(t, idxs, cnt, stopOnMatches, expCount, 1)
+// in intermittent mode, verifying that the request counts match each other.
-	count16 := testMatcherWithReqCount(t, idxs, cnt, stopOnMatches, expCount, 16)
+func testMatcherBothModes(t *testing.T, filter [][]bloomIndexes, blocks uint64, retrievals uint32) {
-	if count1 != count16 {
+	continuous := testMatcher(t, filter, blocks, false, retrievals, 16)
-		t.Errorf("Error matching idxs = %v  count = %v  stopOnMatches = %v: request count mismatch, %v with maxReqCount = 1 vs. %v with maxReqCount = 16", idxs, cnt, stopOnMatches, count1, count16)
+	intermittent := testMatcher(t, filter, blocks, true, retrievals, 16)
+
+	if continuous != intermittent {
+		t.Errorf("filter = %v blocks = %v: request count mismatch, %v in continuous vs. %v in intermittent mode", filter, blocks, continuous, intermittent)
 	}
-	return count1
 }
 
-func testMatcherWithReqCount(t *testing.T, idxs [][]types.BloomIndexList, cnt uint64, stopOnMatches bool, expCount uint32, maxReqCount int) uint32 {
+// testMatcher is a generic tester to run the given matcher test and return the
-	m := NewMatcher(testSectionSize, nil, nil)
+// number of requests made for cross validation between different modes.
+func testMatcher(t *testing.T, filter [][]bloomIndexes, blocks uint64, intermittent bool, retrievals uint32, maxReqCount int) uint32 {
+	// Create a new matcher an simulate our explicit random bitsets
+	matcher := NewMatcher(testSectionSize, nil, nil)
 
-	for _, idxss := range idxs {
+	matcher.addresses = filter[0]
-		for _, idxs := range idxss {
+	matcher.topics = filter[1:]
-			for _, idx := range idxs {
+
-				m.newFetcher(idx)
+	for _, rule := range filter {
+		for _, topic := range rule {
+			for _, bit := range topic {
+				matcher.addScheduler(bit)
 			}
 		}
 	}
+	// Track the number of retrieval requests made
+	var requested uint32
 
-	m.addresses = idxs[0]
+	// Start the matching session for the filter and the retriver goroutines
-	m.topics = idxs[1:]
+	quit := make(chan struct{})
-	var reqCount uint32
+	matches := make(chan uint64, 16)
 
-	stop := make(chan struct{})
+	session, err := matcher.Start(0, blocks-1, matches)
-	chn := m.Start(0, cnt-1)
+	if err != nil {
-	testServeMatcher(m, stop, &reqCount, maxReqCount)
+		t.Fatalf("failed to stat matcher session: %v", err)
+	}
+	startRetrievers(session, quit, &requested, maxReqCount)
 
-	for i := uint64(0); i < cnt; i++ {
+	// Iterate over all the blocks and verify that the pipeline produces the correct matches
-		if expMatch3(idxs, i) {
+	for i := uint64(0); i < blocks; i++ {
-			match, ok := <-chn
+		if expMatch3(filter, i) {
+			match, ok := <-matches
 			if !ok {
-				t.Errorf("Error matching idxs = %v  count = %v  stopOnMatches = %v: expected #%v, results channel closed", idxs, cnt, stopOnMatches, i)
+				t.Errorf("filter = %v  blocks = %v  intermittent = %v: expected #%v, results channel closed", filter, blocks, intermittent, i)
 				return 0
 			}
 			if match != i {
-				t.Errorf("Error matching idxs = %v  count = %v  stopOnMatches = %v: expected #%v, got #%v", idxs, cnt, stopOnMatches, i, match)
+				t.Errorf("filter = %v  blocks = %v  intermittent = %v: expected #%v, got #%v", filter, blocks, intermittent, i, match)
 			}
-			if stopOnMatches {
+			// If we're testing intermittent mode, abort and restart the pipeline
-				m.Stop()
+			if intermittent {
-				close(stop)
+				session.Close(time.Second)
-				stop = make(chan struct{})
+				close(quit)
-				chn = m.Start(i+1, cnt-1)
+
-				testServeMatcher(m, stop, &reqCount, maxReqCount)
+				quit = make(chan struct{})
+				matches = make(chan uint64, 16)
+
+				session, err = matcher.Start(i+1, blocks-1, matches)
+				if err != nil {
+					t.Fatalf("failed to stat matcher session: %v", err)
+				}
+				startRetrievers(session, quit, &requested, maxReqCount)
 			}
 		}
 	}
-	match, ok := <-chn
+	// Ensure the result channel is torn down after the last block
+	match, ok := <-matches
 	if ok {
-		t.Errorf("Error matching idxs = %v  count = %v  stopOnMatches = %v: expected closed channel, got #%v", idxs, cnt, stopOnMatches, match)
+		t.Errorf("filter = %v  blocks = %v  intermittent = %v: expected closed channel, got #%v", filter, blocks, intermittent, match)
 	}
-	m.Stop()
+	// Clean up the session and ensure we match the expected retrieval count
-	close(stop)
+	session.Close(time.Second)
+	close(quit)
 
-	if expCount != 0 && expCount != reqCount {
+	if retrievals != 0 && requested != retrievals {
-		t.Errorf("Error matching idxs = %v  count = %v  stopOnMatches = %v: request count mismatch, expected #%v, got #%v", idxs, cnt, stopOnMatches, expCount, reqCount)
+		t.Errorf("filter = %v  blocks = %v  intermittent = %v: request count mismatch, have #%v, want #%v", filter, blocks, intermittent, requested, retrievals)
 	}
+	return requested
+}
+
+// startRetrievers starts a batch of goroutines listening for section requests
+// and serving them.
+func startRetrievers(session *MatcherSession, quit chan struct{}, retrievals *uint32, batch int) {
+	requests := make(chan chan *Retrieval)
+
+	for i := 0; i < 10; i++ {
+		// Start a multiplexer to test multiple threaded execution
+		go session.Multiplex(batch, 100*time.Microsecond, requests)
 
-	return reqCount
+		// Start a services to match the above multiplexer
+		go func() {
+			for {
+				// Wait for a service request or a shutdown
+				select {
+				case <-quit:
+					return
+
+				case request := <-requests:
+					task := <-request
+
+					task.Bitsets = make([][]byte, len(task.Sections))
+					for i, section := range task.Sections {
+						if rand.Int()%4 != 0 { // Handle occasional missing deliveries
+							task.Bitsets[i] = generateBitset(task.Bit, section)
+							atomic.AddUint32(retrievals, 1)
+						}
+					}
+					request <- task
+				}
+			}
+		}()
+	}
 }
 
-func testRandomIdxs(l []int, max int) [][]types.BloomIndexList {
+// generateBitset generates the rotated bitset for the given bloom bit and section
-	res := make([][]types.BloomIndexList, len(l))
+// numbers.
-	for i, ll := range l {
+func generateBitset(bit uint, section uint64) []byte {
-		res[i] = make([]types.BloomIndexList, ll)
+	bitset := make([]byte, testSectionSize/8)
-		for j, _ := range res[i] {
+	for i := 0; i < len(bitset); i++ {
-			for k, _ := range res[i][j] {
+		for b := 0; b < 8; b++ {
-				res[i][j][k] = uint(rand.Intn(max-1) + 2)
+			blockIdx := section*testSectionSize + uint64(i*8+b)
+			bitset[i] += bitset[i]
+			if (blockIdx % uint64(bit)) == 0 {
+				bitset[i]++
 			}
 		}
 	}
-	return res
+	return bitset
 }
 
-func TestMatcher(t *testing.T) {
+func expMatch1(filter bloomIndexes, i uint64) bool {
-	testMatcher(t, [][]types.BloomIndexList{{{10, 20, 30}}}, 100000, false, 75)
+	for _, ii := range filter {
-	testMatcher(t, [][]types.BloomIndexList{{{32, 3125, 100}}, {{40, 50, 10}}}, 100000, false, 81)
+		if (i % uint64(ii)) != 0 {
-	testMatcher(t, [][]types.BloomIndexList{{{4, 8, 11}, {7, 8, 17}}, {{9, 9, 12}, {15, 20, 13}}, {{18, 15, 15}, {12, 10, 4}}}, 10000, false, 36)
+			return false
+		}
+	}
+	return true
 }
 
-func TestMatcherStopOnMatches(t *testing.T) {
+func expMatch2(filter []bloomIndexes, i uint64) bool {
-	testMatcher(t, [][]types.BloomIndexList{{{10, 20, 30}}}, 100000, true, 75)
+	for _, ii := range filter {
-	testMatcher(t, [][]types.BloomIndexList{{{4, 8, 11}, {7, 8, 17}}, {{9, 9, 12}, {15, 20, 13}}, {{18, 15, 15}, {12, 10, 4}}}, 10000, true, 36)
+		if expMatch1(ii, i) {
+			return true
+		}
+	}
+	return false
 }
 
-func TestMatcherRandom(t *testing.T) {
+func expMatch3(filter [][]bloomIndexes, i uint64) bool {
-	for i := 0; i < 20; i++ {
+	for _, ii := range filter {
-		testMatcher(t, testRandomIdxs([]int{1}, 50), 100000, false, 0)
+		if !expMatch2(ii, i) {
-		testMatcher(t, testRandomIdxs([]int{3}, 50), 100000, false, 0)
+			return false
-		testMatcher(t, testRandomIdxs([]int{2, 2, 2}, 20), 100000, false, 0)
+		}
-		testMatcher(t, testRandomIdxs([]int{5, 5, 5}, 50), 100000, false, 0)
-		idxs := testRandomIdxs([]int{2, 2, 2}, 20)
-		reqCount := testMatcher(t, idxs, 10000, false, 0)
-		testMatcher(t, idxs, 10000, true, reqCount)
 	}
+	return true
 }

core/bloombits/scheduler.go

@@ -0,0 +1,181 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package bloombits
+
+import (
+	"sync"
+)
+
+// request represents a bloom retrieval task to prioritize and pull from the local
+// database or remotely from the network.
+type request struct {
+	section uint64 // Section index to retrieve the a bit-vector from
+	bit     uint   // Bit index within the section to retrieve the vector of
+}
+
+// response represents the state of a requested bit-vector through a scheduler.
+type response struct {
+	cached []byte        // Cached bits to dedup multiple requests
+	done   chan struct{} // Channel to allow waiting for completion
+}
+
+// scheduler handles the scheduling of bloom-filter retrieval operations for
+// entire section-batches belonging to a single bloom bit. Beside scheduling the
+// retrieval operations, this struct also deduplicates the requests and caches
+// the results to minimize network/database overhead even in complex filtering
+// scenarios.
+type scheduler struct {
+	bit       uint                 // Index of the bit in the bloom filter this scheduler is responsible for
+	responses map[uint64]*response // Currently pending retrieval requests or already cached responses
+	lock      sync.Mutex           // Lock protecting the responses from concurrent access
+}
+
+// newScheduler creates a new bloom-filter retrieval scheduler for a specific
+// bit index.
+func newScheduler(idx uint) *scheduler {
+	return &scheduler{
+		bit:       idx,
+		responses: make(map[uint64]*response),
+	}
+}
+
+// run creates a retrieval pipeline, receiving section indexes from sections and
+// returning the results in the same order through the done channel. Concurrent
+// runs of the same scheduler are allowed, leading to retrieval task deduplication.
+func (s *scheduler) run(sections chan uint64, dist chan *request, done chan []byte, quit chan struct{}, wg *sync.WaitGroup) {
+	// Create a forwarder channel between requests and responses of the same size as
+	// the distribution channel (since that will block the pipeline anyway).
+	pend := make(chan uint64, cap(dist))
+
+	// Start the pipeline schedulers to forward between user -> distributor -> user
+	wg.Add(2)
+	go s.scheduleRequests(sections, dist, pend, quit, wg)
+	go s.scheduleDeliveries(pend, done, quit, wg)
+}
+
+// reset cleans up any leftovers from previous runs. This is required before a
+// restart to ensure the no previously requested but never delivered state will
+// cause a lockup.
+func (s *scheduler) reset() {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	for section, res := range s.responses {
+		if res.cached == nil {
+			delete(s.responses, section)
+		}
+	}
+}
+
+// scheduleRequests reads section retrieval requests from the input channel,
+// deduplicates the stream and pushes unique retrieval tasks into the distribution
+// channel for a database or network layer to honour.
+func (s *scheduler) scheduleRequests(reqs chan uint64, dist chan *request, pend chan uint64, quit chan struct{}, wg *sync.WaitGroup) {
+	// Clean up the goroutine and pipeline when done
+	defer wg.Done()
+	defer close(pend)
+
+	// Keep reading and scheduling section requests
+	for {
+		select {
+		case <-quit:
+			return
+
+		case section, ok := <-reqs:
+			// New section retrieval requested
+			if !ok {
+				return
+			}
+			// Deduplicate retrieval requests
+			unique := false
+
+			s.lock.Lock()
+			if s.responses[section] == nil {
+				s.responses[section] = &response{
+					done: make(chan struct{}),
+				}
+				unique = true
+			}
+			s.lock.Unlock()
+
+			// Schedule the section for retrieval and notify the deliverer to expect this section
+			if unique {
+				select {
+				case <-quit:
+					return
+				case dist <- &request{bit: s.bit, section: section}:
+				}
+			}
+			select {
+			case <-quit:
+				return
+			case pend <- section:
+			}
+		}
+	}
+}
+
+// scheduleDeliveries reads section acceptance notifications and waits for them
+// to be delivered, pushing them into the output data buffer.
+func (s *scheduler) scheduleDeliveries(pend chan uint64, done chan []byte, quit chan struct{}, wg *sync.WaitGroup) {
+	// Clean up the goroutine and pipeline when done
+	defer wg.Done()
+	defer close(done)
+
+	// Keep reading notifications and scheduling deliveries
+	for {
+		select {
+		case <-quit:
+			return
+
+		case idx, ok := <-pend:
+			// New section retrieval pending
+			if !ok {
+				return
+			}
+			// Wait until the request is honoured
+			s.lock.Lock()
+			res := s.responses[idx]
+			s.lock.Unlock()
+
+			select {
+			case <-quit:
+				return
+			case <-res.done:
+			}
+			// Deliver the result
+			select {
+			case <-quit:
+				return
+			case done <- res.cached:
+			}
+		}
+	}
+}
+
+// deliver is called by the request distributor when a reply to a request arrives.
+func (s *scheduler) deliver(sections []uint64, data [][]byte) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	for i, section := range sections {
+		if res := s.responses[section]; res != nil && res.cached == nil { // Avoid non-requests and double deliveries
+			res.cached = data[i]
+			close(res.done)
+		}
+	}
+}

core/bloombits/scheduler_test.go

@@ -0,0 +1,105 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package bloombits
+
+import (
+	"bytes"
+	"math/big"
+	"math/rand"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+)
+
+// Tests that the scheduler can deduplicate and forward retrieval requests to
+// underlying fetchers and serve responses back, irrelevant of the concurrency
+// of the requesting clients or serving data fetchers.
+func TestSchedulerSingleClientSingleFetcher(t *testing.T) { testScheduler(t, 1, 1, 5000) }
+func TestSchedulerSingleClientMultiFetcher(t *testing.T)  { testScheduler(t, 1, 10, 5000) }
+func TestSchedulerMultiClientSingleFetcher(t *testing.T)  { testScheduler(t, 10, 1, 5000) }
+func TestSchedulerMultiClientMultiFetcher(t *testing.T)   { testScheduler(t, 10, 10, 5000) }
+
+func testScheduler(t *testing.T, clients int, fetchers int, requests int) {
+	f := newScheduler(0)
+
+	// Create a batch of handler goroutines that respond to bloom bit requests and
+	// deliver them to the scheduler.
+	var fetchPend sync.WaitGroup
+	fetchPend.Add(fetchers)
+	defer fetchPend.Wait()
+
+	fetch := make(chan *request, 16)
+	defer close(fetch)
+
+	var delivered uint32
+	for i := 0; i < fetchers; i++ {
+		go func() {
+			defer fetchPend.Done()
+
+			for req := range fetch {
+				time.Sleep(time.Duration(rand.Intn(int(100 * time.Microsecond))))
+				atomic.AddUint32(&delivered, 1)
+
+				f.deliver([]uint64{
+					req.section + uint64(requests), // Non-requested data (ensure it doesn't go out of bounds)
+					req.section,                    // Requested data
+					req.section,                    // Duplicated data (ensure it doesn't double close anything)
+				}, [][]byte{
+					[]byte{},
+					new(big.Int).SetUint64(req.section).Bytes(),
+					new(big.Int).SetUint64(req.section).Bytes(),
+				})
+			}
+		}()
+	}
+	// Start a batch of goroutines to concurrently run scheduling tasks
+	quit := make(chan struct{})
+
+	var pend sync.WaitGroup
+	pend.Add(clients)
+
+	for i := 0; i < clients; i++ {
+		go func() {
+			defer pend.Done()
+
+			in := make(chan uint64, 16)
+			out := make(chan []byte, 16)
+
+			f.run(in, fetch, out, quit, &pend)
+
+			go func() {
+				for j := 0; j < requests; j++ {
+					in <- uint64(j)
+				}
+				close(in)
+			}()
+
+			for j := 0; j < requests; j++ {
+				bits := <-out
+				if want := new(big.Int).SetUint64(uint64(j)).Bytes(); !bytes.Equal(bits, want) {
+					t.Errorf("vector %d: delivered content mismatch: have %x, want %x", j, bits, want)
+				}
+			}
+		}()
+	}
+	pend.Wait()
+
+	if have := atomic.LoadUint32(&delivered); int(have) != requests {
+		t.Errorf("request count mismatch: have %v, want %v", have, requests)
+	}
+}

core/bloombits/utils.go

@@ -1,63 +0,0 @@
-// Copyright 2017 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-package bloombits
-
-import (
-	"github.com/ethereum/go-ethereum/core/types"
-)
-
-const BloomLength = 2048
-
-// BloomBitsCreator takes SectionSize number of header bloom filters and calculates the bloomBits vectors of the section
-type BloomBitsCreator struct {
-	blooms              [BloomLength][]byte
-	sectionSize, bitIndex uint64
-}
-
-func NewBloomBitsCreator(sectionSize uint64) *BloomBitsCreator {
-	b := &BloomBitsCreator{sectionSize: sectionSize}
-	for i, _ := range b.blooms {
-		b.blooms[i] = make([]byte, sectionSize/8)
-	}
-	return b
-}
-
-// AddHeaderBloom takes a single bloom filter and sets the corresponding bit column in memory accordingly
-func (b *BloomBitsCreator) AddHeaderBloom(bloom types.Bloom) {
-	if b.bitIndex >= b.sectionSize {
-		panic("too many header blooms added")
-	}
-
-	byteIdx := b.bitIndex / 8
-	bitMask := byte(1) << byte(7-b.bitIndex%8)
-	for bloomBitIdx, _ := range b.blooms {
-		bloomByteIdx := BloomLength/8 - 1 - bloomBitIdx/8
-		bloomBitMask := byte(1) << byte(bloomBitIdx%8)
-		if (bloom[bloomByteIdx] & bloomBitMask) != 0 {
-			b.blooms[bloomBitIdx][byteIdx] |= bitMask
-		}
-	}
-	b.bitIndex++
-}
-
-// GetBitVector returns the bit vector belonging to the given bit index after header blooms have been added
-func (b *BloomBitsCreator) GetBitVector(idx uint) []byte {
-	if b.bitIndex != b.sectionSize {
-		panic("not enough header blooms added")
-	}
-
-	return b.blooms[idx][:]
-}

core/chain_indexer.go

@@ -36,14 +36,13 @@ import (
 type ChainIndexerBackend interface {
 	// Reset initiates the processing of a new chain segment, potentially terminating
 	// any partially completed operations (in case of a reorg).
-	Reset(section uint64, lastSectionHead common.Hash)
+	Reset(section uint64)
 
 	// Process crunches through the next header in the chain segment. The caller
 	// will ensure a sequential order of headers.
 	Process(header *types.Header)
 
-	// Commit finalizes the section metadata and stores it into the database. This
+	// Commit finalizes the section metadata and stores it into the database.
-	// interface will usually be a batch writer.
 	Commit() error
 }
 
@@ -101,34 +100,11 @@ func NewChainIndexer(chainDb, indexDb ethdb.Database, backend ChainIndexerBacken
 	return c
 }
 
-// AddKnownSectionHead marks a new section head as known/processed if it is newer
-// than the already known best section head
-func (c *ChainIndexer) AddKnownSectionHead(section uint64, shead common.Hash) {
-	c.lock.Lock()
-	defer c.lock.Unlock()
-
-	if section < c.storedSections {
-		return
-	}
-	c.setSectionHead(section, shead)
-	c.setValidSections(section + 1)
-}
-
-// IndexerChain interface is used for connecting the indexer to a blockchain
-type IndexerChain interface {
-	CurrentHeader() *types.Header
-	SubscribeChainEvent(ch chan<- ChainEvent) event.Subscription
-}
-
 // Start creates a goroutine to feed chain head events into the indexer for
 // cascading background processing. Children do not need to be started, they
 // are notified about new events by their parents.
-func (c *ChainIndexer) Start(chain IndexerChain) {
+func (c *ChainIndexer) Start(currentHeader *types.Header, chainEventer func(ch chan<- ChainEvent) event.Subscription) {
-	ch := make(chan ChainEvent, 10)
+	go c.eventLoop(currentHeader, chainEventer)
-	sub := chain.SubscribeChainEvent(ch)
-	currentHeader := chain.CurrentHeader()
-
-	go c.eventLoop(currentHeader, ch, sub)
 }
 
 // Close tears down all goroutines belonging to the indexer and returns any error
@@ -149,14 +125,12 @@ func (c *ChainIndexer) Close() error {
 			errs = append(errs, err)
 		}
 	}
-
 	// Close all children
 	for _, child := range c.children {
 		if err := child.Close(); err != nil {
 			errs = append(errs, err)
 		}
 	}
-
 	// Return any failures
 	switch {
 	case len(errs) == 0:
@@ -173,10 +147,12 @@ func (c *ChainIndexer) Close() error {
 // eventLoop is a secondary - optional - event loop of the indexer which is only
 // started for the outermost indexer to push chain head events into a processing
 // queue.
-func (c *ChainIndexer) eventLoop(currentHeader *types.Header, ch chan ChainEvent, sub event.Subscription) {
+func (c *ChainIndexer) eventLoop(currentHeader *types.Header, chainEventer func(ch chan<- ChainEvent) event.Subscription) {
 	// Mark the chain indexer as active, requiring an additional teardown
 	atomic.StoreUint32(&c.active, 1)
 
+	events := make(chan ChainEvent, 10)
+	sub := chainEventer(events)
 	defer sub.Unsubscribe()
 
 	// Fire the initial new head event to start any outstanding processing
@@ -193,7 +169,7 @@ func (c *ChainIndexer) eventLoop(currentHeader *types.Header, ch chan ChainEvent
 			errc <- nil
 			return
 
-		case ev, ok := <-ch:
+		case ev, ok := <-events:
 			// Received a new event, ensure it's not nil (closing) and update
 			if !ok {
 				errc := <-c.quit
@@ -257,10 +233,9 @@ func (c *ChainIndexer) newHead(head uint64, reorg bool) {
 // down into the processing backend.
 func (c *ChainIndexer) updateLoop() {
 	var (
-		updated   time.Time
+		updating bool
-		updateMsg bool
+		updated  time.Time
 	)
-
 	for {
 		select {
 		case errc := <-c.quit:
@@ -275,7 +250,7 @@ func (c *ChainIndexer) updateLoop() {
 				// Periodically print an upgrade log message to the user
 				if time.Since(updated) > 8*time.Second {
 					if c.knownSections > c.storedSections+1 {
-						updateMsg = true
+						updating = true
 						c.log.Info("Upgrading chain index", "percentage", c.storedSections*100/c.knownSections)
 					}
 					updated = time.Now()
@@ -284,7 +259,7 @@ func (c *ChainIndexer) updateLoop() {
 				section := c.storedSections
 				var oldHead common.Hash
 				if section > 0 {
-					oldHead = c.SectionHead(section - 1)
+					oldHead = c.sectionHead(section - 1)
 				}
 				// Process the newly defined section in the background
 				c.lock.Unlock()
@@ -295,11 +270,11 @@ func (c *ChainIndexer) updateLoop() {
 				c.lock.Lock()
 
 				// If processing succeeded and no reorgs occcurred, mark the section completed
-				if err == nil && oldHead == c.SectionHead(section-1) {
+				if err == nil && oldHead == c.sectionHead(section-1) {
 					c.setSectionHead(section, newHead)
 					c.setValidSections(section + 1)
-					if c.storedSections == c.knownSections && updateMsg {
+					if c.storedSections == c.knownSections && updating {
-						updateMsg = false
+						updating = false
 						c.log.Info("Finished upgrading chain index")
 					}
 
@@ -336,7 +311,7 @@ func (c *ChainIndexer) processSection(section uint64, lastHead common.Hash) (com
 	c.log.Trace("Processing new chain section", "section", section)
 
 	// Reset and partial processing
-	c.backend.Reset(section, lastHead)
+	c.backend.Reset(section)
 
 	for number := section * c.sectionSize; number < (section+1)*c.sectionSize; number++ {
 		hash := GetCanonicalHash(c.chainDb, number)
@@ -366,7 +341,7 @@ func (c *ChainIndexer) Sections() (uint64, uint64, common.Hash) {
 	c.lock.Lock()
 	defer c.lock.Unlock()
 
-	return c.storedSections, c.storedSections*c.sectionSize - 1, c.SectionHead(c.storedSections - 1)
+	return c.storedSections, c.storedSections*c.sectionSize - 1, c.sectionHead(c.storedSections - 1)
 }
 
 // AddChildIndexer adds a child ChainIndexer that can use the output of this one
@@ -408,7 +383,7 @@ func (c *ChainIndexer) setValidSections(sections uint64) {
 
 // sectionHead retrieves the last block hash of a processed section from the
 // index database.
-func (c *ChainIndexer) SectionHead(section uint64) common.Hash {
+func (c *ChainIndexer) sectionHead(section uint64) common.Hash {
 	var data [8]byte
 	binary.BigEndian.PutUint64(data[:], section)
 

core/chain_indexer_test.go

@@ -23,7 +23,6 @@ import (
 	"testing"
 	"time"
 
-	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethdb"
 )
@@ -209,7 +208,7 @@ func (b *testChainIndexBackend) reorg(headNum uint64) uint64 {
 	return b.stored * b.indexer.sectionSize
 }
 
-func (b *testChainIndexBackend) Reset(section uint64, lastSectionHead common.Hash) {
+func (b *testChainIndexBackend) Reset(section uint64) {
 	b.section = section
 	b.headerCnt = 0
 }

core/database_util.go

@@ -33,21 +33,41 @@ import (
 	"github.com/ethereum/go-ethereum/rlp"
 )
 
+// DatabaseReader wraps the Get method of a backing data store.
+type DatabaseReader interface {
+	Get(key []byte) (value []byte, err error)
+}
+
+// DatabaseWriter wraps the Put method of a backing data store.
+type DatabaseWriter interface {
+	Put(key, value []byte) error
+}
+
+// DatabaseDeleter wraps the Delete method of a backing data store.
+type DatabaseDeleter interface {
+	Delete(key []byte) error
+}
+
 var (
 	headHeaderKey = []byte("LastHeader")
 	headBlockKey  = []byte("LastBlock")
 	headFastKey   = []byte("LastFast")
 
-	headerPrefix        = []byte("h")   // headerPrefix + num (uint64 big endian) + hash -> header
+	// Data item prefixes (use single byte to avoid mixing data types, avoid `i`).
-	tdSuffix            = []byte("t")   // headerPrefix + num (uint64 big endian) + hash + tdSuffix -> td
+	headerPrefix        = []byte("h") // headerPrefix + num (uint64 big endian) + hash -> header
-	numSuffix           = []byte("n")   // headerPrefix + num (uint64 big endian) + numSuffix -> hash
+	tdSuffix            = []byte("t") // headerPrefix + num (uint64 big endian) + hash + tdSuffix -> td
-	blockHashPrefix     = []byte("H")   // blockHashPrefix + hash -> num (uint64 big endian)
+	numSuffix           = []byte("n") // headerPrefix + num (uint64 big endian) + numSuffix -> hash
-	bodyPrefix          = []byte("b")   // bodyPrefix + num (uint64 big endian) + hash -> block body
+	blockHashPrefix     = []byte("H") // blockHashPrefix + hash -> num (uint64 big endian)
-	blockReceiptsPrefix = []byte("r")   // blockReceiptsPrefix + num (uint64 big endian) + hash -> block receipts
+	bodyPrefix          = []byte("b") // bodyPrefix + num (uint64 big endian) + hash -> block body
-	lookupPrefix        = []byte("l")   // lookupPrefix + hash -> transaction/receipt lookup metadata
+	blockReceiptsPrefix = []byte("r") // blockReceiptsPrefix + num (uint64 big endian) + hash -> block receipts
-	preimagePrefix      = "secure-key-" // preimagePrefix + hash -> preimage
+	lookupPrefix        = []byte("l") // lookupPrefix + hash -> transaction/receipt lookup metadata
+	bloomBitsPrefix     = []byte("B") // bloomBitsPrefix + bit (uint16 big endian) + section (uint64 big endian) + hash -> bloom bits
 
-	configPrefix = []byte("ethereum-config-") // config prefix for the db
+	preimagePrefix = "secure-key-"              // preimagePrefix + hash -> preimage
+	configPrefix   = []byte("ethereum-config-") // config prefix for the db
+
+	// Chain index prefixes (use `i` + single byte to avoid mixing data types).
+	BloomBitsIndexPrefix = []byte("iB") // BloomBitsIndexPrefix is the data table of a chain indexer to track its progress
 
 	// used by old db, now only used for conversion
 	oldReceiptsPrefix = []byte("receipts-")
@@ -57,8 +77,6 @@ var (
 
 	preimageCounter    = metrics.NewCounter("db/preimage/total")
 	preimageHitCounter = metrics.NewCounter("db/preimage/hits")
-
-	bloomBitsPrefix = []byte("bloomBits-")
 )
 
 // txLookupEntry is a positional metadata to help looking up the data content of
@@ -77,7 +95,7 @@ func encodeBlockNumber(number uint64) []byte {
 }
 
 // GetCanonicalHash retrieves a hash assigned to a canonical block number.
-func GetCanonicalHash(db ethdb.Database, number uint64) common.Hash {
+func GetCanonicalHash(db DatabaseReader, number uint64) common.Hash {
 	data, _ := db.Get(append(append(headerPrefix, encodeBlockNumber(number)...), numSuffix...))
 	if len(data) == 0 {
 		return common.Hash{}
@@ -91,7 +109,7 @@ const missingNumber = uint64(0xffffffffffffffff)
 
 // GetBlockNumber returns the block number assigned to a block hash
 // if the corresponding header is present in the database
-func GetBlockNumber(db ethdb.Database, hash common.Hash) uint64 {
+func GetBlockNumber(db DatabaseReader, hash common.Hash) uint64 {
 	data, _ := db.Get(append(blockHashPrefix, hash.Bytes()...))
 	if len(data) != 8 {
 		return missingNumber
@@ -104,7 +122,7 @@ func GetBlockNumber(db ethdb.Database, hash common.Hash) uint64 {
 // last block hash is only updated upon a full block import, the last header
 // hash is updated already at header import, allowing head tracking for the
 // light synchronization mechanism.
-func GetHeadHeaderHash(db ethdb.Database) common.Hash {
+func GetHeadHeaderHash(db DatabaseReader) common.Hash {
 	data, _ := db.Get(headHeaderKey)
 	if len(data) == 0 {
 		return common.Hash{}
@@ -113,7 +131,7 @@ func GetHeadHeaderHash(db ethdb.Database) common.Hash {
 }
 
 // GetHeadBlockHash retrieves the hash of the current canonical head block.
-func GetHeadBlockHash(db ethdb.Database) common.Hash {
+func GetHeadBlockHash(db DatabaseReader) common.Hash {
 	data, _ := db.Get(headBlockKey)
 	if len(data) == 0 {
 		return common.Hash{}
@@ -125,7 +143,7 @@ func GetHeadBlockHash(db ethdb.Database) common.Hash {
 // fast synchronization. The difference between this and GetHeadBlockHash is that
 // whereas the last block hash is only updated upon a full block import, the last
 // fast hash is updated when importing pre-processed blocks.
-func GetHeadFastBlockHash(db ethdb.Database) common.Hash {
+func GetHeadFastBlockHash(db DatabaseReader) common.Hash {
 	data, _ := db.Get(headFastKey)
 	if len(data) == 0 {
 		return common.Hash{}
@@ -135,14 +153,14 @@ func GetHeadFastBlockHash(db ethdb.Database) common.Hash {
 
 // GetHeaderRLP retrieves a block header in its raw RLP database encoding, or nil
 // if the header's not found.
-func GetHeaderRLP(db ethdb.Database, hash common.Hash, number uint64) rlp.RawValue {
+func GetHeaderRLP(db DatabaseReader, hash common.Hash, number uint64) rlp.RawValue {
 	data, _ := db.Get(append(append(headerPrefix, encodeBlockNumber(number)...), hash.Bytes()...))
 	return data
 }
 
 // GetHeader retrieves the block header corresponding to the hash, nil if none
 // found.
-func GetHeader(db ethdb.Database, hash common.Hash, number uint64) *types.Header {
+func GetHeader(db DatabaseReader, hash common.Hash, number uint64) *types.Header {
 	data := GetHeaderRLP(db, hash, number)
 	if len(data) == 0 {
 		return nil
@@ -156,14 +174,14 @@ func GetHeader(db ethdb.Database, hash common.Hash, number uint64) *types.Header
 }
 
 // GetBodyRLP retrieves the block body (transactions and uncles) in RLP encoding.
-func GetBodyRLP(db ethdb.Database, hash common.Hash, number uint64) rlp.RawValue {
+func GetBodyRLP(db DatabaseReader, hash common.Hash, number uint64) rlp.RawValue {
 	data, _ := db.Get(append(append(bodyPrefix, encodeBlockNumber(number)...), hash.Bytes()...))
 	return data
 }
 
 // GetBody retrieves the block body (transactons, uncles) corresponding to the
 // hash, nil if none found.
-func GetBody(db ethdb.Database, hash common.Hash, number uint64) *types.Body {
+func GetBody(db DatabaseReader, hash common.Hash, number uint64) *types.Body {
 	data := GetBodyRLP(db, hash, number)
 	if len(data) == 0 {
 		return nil
@@ -178,7 +196,7 @@ func GetBody(db ethdb.Database, hash common.Hash, number uint64) *types.Body {
 
 // GetTd retrieves a block's total difficulty corresponding to the hash, nil if
 // none found.
-func GetTd(db ethdb.Database, hash common.Hash, number uint64) *big.Int {
+func GetTd(db DatabaseReader, hash common.Hash, number uint64) *big.Int {
 	data, _ := db.Get(append(append(append(headerPrefix, encodeBlockNumber(number)...), hash[:]...), tdSuffix...))
 	if len(data) == 0 {
 		return nil
@@ -197,7 +215,7 @@ func GetTd(db ethdb.Database, hash common.Hash, number uint64) *big.Int {
 //
 // Note, due to concurrent download of header and block body the header and thus
 // canonical hash can be stored in the database but the body data not (yet).
-func GetBlock(db ethdb.Database, hash common.Hash, number uint64) *types.Block {
+func GetBlock(db DatabaseReader, hash common.Hash, number uint64) *types.Block {
 	// Retrieve the block header and body contents
 	header := GetHeader(db, hash, number)
 	if header == nil {
@@ -213,7 +231,7 @@ func GetBlock(db ethdb.Database, hash common.Hash, number uint64) *types.Block {
 
 // GetBlockReceipts retrieves the receipts generated by the transactions included
 // in a block given by its hash.
-func GetBlockReceipts(db ethdb.Database, hash common.Hash, number uint64) types.Receipts {
+func GetBlockReceipts(db DatabaseReader, hash common.Hash, number uint64) types.Receipts {
 	data, _ := db.Get(append(append(blockReceiptsPrefix, encodeBlockNumber(number)...), hash[:]...))
 	if len(data) == 0 {
 		return nil
@@ -232,7 +250,7 @@ func GetBlockReceipts(db ethdb.Database, hash common.Hash, number uint64) types.
 
 // GetTxLookupEntry retrieves the positional metadata associated with a transaction
 // hash to allow retrieving the transaction or receipt by hash.
-func GetTxLookupEntry(db ethdb.Database, hash common.Hash) (common.Hash, uint64, uint64) {
+func GetTxLookupEntry(db DatabaseReader, hash common.Hash) (common.Hash, uint64, uint64) {
 	// Load the positional metadata from disk and bail if it fails
 	data, _ := db.Get(append(lookupPrefix, hash.Bytes()...))
 	if len(data) == 0 {
@@ -249,7 +267,7 @@ func GetTxLookupEntry(db ethdb.Database, hash common.Hash) (common.Hash, uint64,
 
 // GetTransaction retrieves a specific transaction from the database, along with
 // its added positional metadata.
-func GetTransaction(db ethdb.Database, hash common.Hash) (*types.Transaction, common.Hash, uint64, uint64) {
+func GetTransaction(db DatabaseReader, hash common.Hash) (*types.Transaction, common.Hash, uint64, uint64) {
 	// Retrieve the lookup metadata and resolve the transaction from the body
 	blockHash, blockNumber, txIndex := GetTxLookupEntry(db, hash)
 
@@ -284,7 +302,7 @@ func GetTransaction(db ethdb.Database, hash common.Hash) (*types.Transaction, co
 
 // GetReceipt retrieves a specific transaction receipt from the database, along with
 // its added positional metadata.
-func GetReceipt(db ethdb.Database, hash common.Hash) (*types.Receipt, common.Hash, uint64, uint64) {
+func GetReceipt(db DatabaseReader, hash common.Hash) (*types.Receipt, common.Hash, uint64, uint64) {
 	// Retrieve the lookup metadata and resolve the receipt from the receipts
 	blockHash, blockNumber, receiptIndex := GetTxLookupEntry(db, hash)
 
@@ -309,8 +327,20 @@ func GetReceipt(db ethdb.Database, hash common.Hash) (*types.Receipt, common.Has
 	return (*types.Receipt)(&receipt), common.Hash{}, 0, 0
 }
 
+// GetBloomBits retrieves the compressed bloom bit vector belonging to the given
+// section and bit index from the.
+func GetBloomBits(db DatabaseReader, bit uint, section uint64, head common.Hash) []byte {
+	key := append(append(bloomBitsPrefix, make([]byte, 10)...), head.Bytes()...)
+
+	binary.BigEndian.PutUint16(key[1:], uint16(bit))
+	binary.BigEndian.PutUint64(key[3:], section)
+
+	bits, _ := db.Get(key)
+	return bits
+}
+
 // WriteCanonicalHash stores the canonical hash for the given block number.
-func WriteCanonicalHash(db ethdb.Database, hash common.Hash, number uint64) error {
+func WriteCanonicalHash(db DatabaseWriter, hash common.Hash, number uint64) error {
 	key := append(append(headerPrefix, encodeBlockNumber(number)...), numSuffix...)
 	if err := db.Put(key, hash.Bytes()); err != nil {
 		log.Crit("Failed to store number to hash mapping", "err", err)
@@ -319,7 +349,7 @@ func WriteCanonicalHash(db ethdb.Database, hash common.Hash, number uint64) erro
 }
 
 // WriteHeadHeaderHash stores the head header's hash.
-func WriteHeadHeaderHash(db ethdb.Database, hash common.Hash) error {
+func WriteHeadHeaderHash(db DatabaseWriter, hash common.Hash) error {
 	if err := db.Put(headHeaderKey, hash.Bytes()); err != nil {
 		log.Crit("Failed to store last header's hash", "err", err)
 	}
@@ -327,7 +357,7 @@ func WriteHeadHeaderHash(db ethdb.Database, hash common.Hash) error {
 }
 
 // WriteHeadBlockHash stores the head block's hash.
-func WriteHeadBlockHash(db ethdb.Database, hash common.Hash) error {
+func WriteHeadBlockHash(db DatabaseWriter, hash common.Hash) error {
 	if err := db.Put(headBlockKey, hash.Bytes()); err != nil {
 		log.Crit("Failed to store last block's hash", "err", err)
 	}
@@ -335,7 +365,7 @@ func WriteHeadBlockHash(db ethdb.Database, hash common.Hash) error {
 }
 
 // WriteHeadFastBlockHash stores the fast head block's hash.
-func WriteHeadFastBlockHash(db ethdb.Database, hash common.Hash) error {
+func WriteHeadFastBlockHash(db DatabaseWriter, hash common.Hash) error {
 	if err := db.Put(headFastKey, hash.Bytes()); err != nil {
 		log.Crit("Failed to store last fast block's hash", "err", err)
 	}
@@ -343,7 +373,7 @@ func WriteHeadFastBlockHash(db ethdb.Database, hash common.Hash) error {
 }
 
 // WriteHeader serializes a block header into the database.
-func WriteHeader(db ethdb.Database, header *types.Header) error {
+func WriteHeader(db DatabaseWriter, header *types.Header) error {
 	data, err := rlp.EncodeToBytes(header)
 	if err != nil {
 		return err
@@ -363,7 +393,7 @@ func WriteHeader(db ethdb.Database, header *types.Header) error {
 }
 
 // WriteBody serializes the body of a block into the database.
-func WriteBody(db ethdb.Database, hash common.Hash, number uint64, body *types.Body) error {
+func WriteBody(db DatabaseWriter, hash common.Hash, number uint64, body *types.Body) error {
 	data, err := rlp.EncodeToBytes(body)
 	if err != nil {
 		return err
@@ -372,7 +402,7 @@ func WriteBody(db ethdb.Database, hash common.Hash, number uint64, body *types.B
 }
 
 // WriteBodyRLP writes a serialized body of a block into the database.
-func WriteBodyRLP(db ethdb.Database, hash common.Hash, number uint64, rlp rlp.RawValue) error {
+func WriteBodyRLP(db DatabaseWriter, hash common.Hash, number uint64, rlp rlp.RawValue) error {
 	key := append(append(bodyPrefix, encodeBlockNumber(number)...), hash.Bytes()...)
 	if err := db.Put(key, rlp); err != nil {
 		log.Crit("Failed to store block body", "err", err)
@@ -381,7 +411,7 @@ func WriteBodyRLP(db ethdb.Database, hash common.Hash, number uint64, rlp rlp.Ra
 }
 
 // WriteTd serializes the total difficulty of a block into the database.
-func WriteTd(db ethdb.Database, hash common.Hash, number uint64, td *big.Int) error {
+func WriteTd(db DatabaseWriter, hash common.Hash, number uint64, td *big.Int) error {
 	data, err := rlp.EncodeToBytes(td)
 	if err != nil {
 		return err
@@ -394,7 +424,7 @@ func WriteTd(db ethdb.Database, hash common.Hash, number uint64, td *big.Int) er
 }
 
 // WriteBlock serializes a block into the database, header and body separately.
-func WriteBlock(db ethdb.Database, block *types.Block) error {
+func WriteBlock(db DatabaseWriter, block *types.Block) error {
 	// Store the body first to retain database consistency
 	if err := WriteBody(db, block.Hash(), block.NumberU64(), block.Body()); err != nil {
 		return err
@@ -409,7 +439,7 @@ func WriteBlock(db ethdb.Database, block *types.Block) error {
 // WriteBlockReceipts stores all the transaction receipts belonging to a block
 // as a single receipt slice. This is used during chain reorganisations for
 // rescheduling dropped transactions.
-func WriteBlockReceipts(db ethdb.Database, hash common.Hash, number uint64, receipts types.Receipts) error {
+func WriteBlockReceipts(db DatabaseWriter, hash common.Hash, number uint64, receipts types.Receipts) error {
 	// Convert the receipts into their storage form and serialize them
 	storageReceipts := make([]*types.ReceiptForStorage, len(receipts))
 	for i, receipt := range receipts {
@@ -454,29 +484,42 @@ func WriteTxLookupEntries(db ethdb.Database, block *types.Block) error {
 	return nil
 }
 
+// WriteBloomBits writes the compressed bloom bits vector belonging to the given
+// section and bit index.
+func WriteBloomBits(db DatabaseWriter, bit uint, section uint64, head common.Hash, bits []byte) {
+	key := append(append(bloomBitsPrefix, make([]byte, 10)...), head.Bytes()...)
+
+	binary.BigEndian.PutUint16(key[1:], uint16(bit))
+	binary.BigEndian.PutUint64(key[3:], section)
+
+	if err := db.Put(key, bits); err != nil {
+		log.Crit("Failed to store bloom bits", "err", err)
+	}
+}
+
 // DeleteCanonicalHash removes the number to hash canonical mapping.
-func DeleteCanonicalHash(db ethdb.Database, number uint64) {
+func DeleteCanonicalHash(db DatabaseDeleter, number uint64) {
 	db.Delete(append(append(headerPrefix, encodeBlockNumber(number)...), numSuffix...))
 }
 
 // DeleteHeader removes all block header data associated with a hash.
-func DeleteHeader(db ethdb.Database, hash common.Hash, number uint64) {
+func DeleteHeader(db DatabaseDeleter, hash common.Hash, number uint64) {
 	db.Delete(append(blockHashPrefix, hash.Bytes()...))
 	db.Delete(append(append(headerPrefix, encodeBlockNumber(number)...), hash.Bytes()...))
 }
 
 // DeleteBody removes all block body data associated with a hash.
-func DeleteBody(db ethdb.Database, hash common.Hash, number uint64) {
+func DeleteBody(db DatabaseDeleter, hash common.Hash, number uint64) {
 	db.Delete(append(append(bodyPrefix, encodeBlockNumber(number)...), hash.Bytes()...))
 }
 
 // DeleteTd removes all block total difficulty data associated with a hash.
-func DeleteTd(db ethdb.Database, hash common.Hash, number uint64) {
+func DeleteTd(db DatabaseDeleter, hash common.Hash, number uint64) {
 	db.Delete(append(append(append(headerPrefix, encodeBlockNumber(number)...), hash.Bytes()...), tdSuffix...))
 }
 
 // DeleteBlock removes all block data associated with a hash.
-func DeleteBlock(db ethdb.Database, hash common.Hash, number uint64) {
+func DeleteBlock(db DatabaseDeleter, hash common.Hash, number uint64) {
 	DeleteBlockReceipts(db, hash, number)
 	DeleteHeader(db, hash, number)
 	DeleteBody(db, hash, number)
@@ -484,12 +527,12 @@ func DeleteBlock(db ethdb.Database, hash common.Hash, number uint64) {
 }
 
 // DeleteBlockReceipts removes all receipt data associated with a block hash.
-func DeleteBlockReceipts(db ethdb.Database, hash common.Hash, number uint64) {
+func DeleteBlockReceipts(db DatabaseDeleter, hash common.Hash, number uint64) {
 	db.Delete(append(append(blockReceiptsPrefix, encodeBlockNumber(number)...), hash.Bytes()...))
 }
 
 // DeleteTxLookupEntry removes all transaction data associated with a hash.
-func DeleteTxLookupEntry(db ethdb.Database, hash common.Hash) {
+func DeleteTxLookupEntry(db DatabaseDeleter, hash common.Hash) {
 	db.Delete(append(lookupPrefix, hash.Bytes()...))
 }
 
@@ -521,7 +564,7 @@ func WritePreimages(db ethdb.Database, number uint64, preimages map[common.Hash]
 }
 
 // GetBlockChainVersion reads the version number from db.
-func GetBlockChainVersion(db ethdb.Database) int {
+func GetBlockChainVersion(db DatabaseReader) int {
 	var vsn uint
 	enc, _ := db.Get([]byte("BlockchainVersion"))
 	rlp.DecodeBytes(enc, &vsn)
@@ -529,13 +572,13 @@ func GetBlockChainVersion(db ethdb.Database) int {
 }
 
 // WriteBlockChainVersion writes vsn as the version number to db.
-func WriteBlockChainVersion(db ethdb.Database, vsn int) {
+func WriteBlockChainVersion(db DatabaseWriter, vsn int) {
 	enc, _ := rlp.EncodeToBytes(uint(vsn))
 	db.Put([]byte("BlockchainVersion"), enc)
 }
 
 // WriteChainConfig writes the chain config settings to the database.
-func WriteChainConfig(db ethdb.Database, hash common.Hash, cfg *params.ChainConfig) error {
+func WriteChainConfig(db DatabaseWriter, hash common.Hash, cfg *params.ChainConfig) error {
 	// short circuit and ignore if nil config. GetChainConfig
 	// will return a default.
 	if cfg == nil {
@@ -551,7 +594,7 @@ func WriteChainConfig(db ethdb.Database, hash common.Hash, cfg *params.ChainConf
 }
 
 // GetChainConfig will fetch the network settings based on the given hash.
-func GetChainConfig(db ethdb.Database, hash common.Hash) (*params.ChainConfig, error) {
+func GetChainConfig(db DatabaseReader, hash common.Hash) (*params.ChainConfig, error) {
 	jsonChainConfig, _ := db.Get(append(configPrefix, hash[:]...))
 	if len(jsonChainConfig) == 0 {
 		return nil, ErrChainConfigNotFound
@@ -566,7 +609,7 @@ func GetChainConfig(db ethdb.Database, hash common.Hash) (*params.ChainConfig, e
 }
 
 // FindCommonAncestor returns the last common ancestor of two block headers
-func FindCommonAncestor(db ethdb.Database, a, b *types.Header) *types.Header {
+func FindCommonAncestor(db DatabaseReader, a, b *types.Header) *types.Header {
 	for bn := b.Number.Uint64(); a.Number.Uint64() > bn; {
 		a = GetHeader(db, a.ParentHash, a.Number.Uint64()-1)
 		if a == nil {
@@ -591,22 +634,3 @@ func FindCommonAncestor(db ethdb.Database, a, b *types.Header) *types.Header {
 	}
 	return a
 }
-
-// GetBloomBits reads the compressed bloomBits vector belonging to the given section and bit index from the db
-func GetBloomBits(db ethdb.Database, bitIdx, sectionIdx uint64, sectionHead common.Hash) ([]byte, error) {
-	var encKey [10]byte
-	binary.BigEndian.PutUint16(encKey[0:2], uint16(bitIdx))
-	binary.BigEndian.PutUint64(encKey[2:10], sectionIdx)
-	key := append(append(bloomBitsPrefix, encKey[:]...), sectionHead.Bytes()...)
-	bloomBits, err := db.Get(key)
-	return bloomBits, err
-}
-
-// StoreBloomBits writes the compressed bloomBits vector belonging to the given section and bit index to the db
-func StoreBloomBits(db ethdb.Database, bitIdx, sectionIdx uint64, sectionHead common.Hash, bloomBits []byte) {
-	var encKey [10]byte
-	binary.BigEndian.PutUint16(encKey[0:2], uint16(bitIdx))
-	binary.BigEndian.PutUint64(encKey[2:10], sectionIdx)
-	key := append(append(bloomBitsPrefix, encKey[:]...), sectionHead.Bytes()...)
-	db.Put(key, bloomBits)
-}

core/types/bloom9.go

@@ -28,10 +28,16 @@ type bytesBacked interface {
 	Bytes() []byte
 }
 
-const bloomLength = 256
+const (
+	// BloomByteLength represents the number of bytes used in a header log bloom.
+	BloomByteLength = 256
 
-// Bloom represents a 256 bit bloom filter.
+	// BloomBitLength represents the number of bits used in a header log bloom.
-type Bloom [bloomLength]byte
+	BloomBitLength = 8 * BloomByteLength
+)
+
+// Bloom represents a 2048 bit bloom filter.
+type Bloom [BloomByteLength]byte
 
 // BytesToBloom converts a byte slice to a bloom filter.
 // It panics if b is not of suitable size.
@@ -47,7 +53,7 @@ func (b *Bloom) SetBytes(d []byte) {
 	if len(b) < len(d) {
 		panic(fmt.Sprintf("bloom bytes too big %d %d", len(b), len(d)))
 	}
-	copy(b[bloomLength-len(d):], d)
+	copy(b[BloomByteLength-len(d):], d)
 }
 
 // Add adds d to the filter. Future calls of Test(d) will return true.
@@ -106,20 +112,6 @@ func LogsBloom(logs []*Log) *big.Int {
 	return bin
 }
 
-type BloomIndexList [3]uint
-
-// BloomIndexes returns the bloom filter bit indexes belonging to the given key
-func BloomIndexes(b []byte) BloomIndexList {
-	b = crypto.Keccak256(b[:])
-
-	var r [3]uint
-	for i, _ := range r {
-		r[i] = (uint(b[i+i+1]) + (uint(b[i+i]) << 8)) & 2047
-	}
-
-	return r
-}
-
 func bloom9(b []byte) *big.Int {
 	b = crypto.Keccak256(b[:])
 

eth/api_backend.go

@@ -24,11 +24,11 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/math"
 	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/core/bloombits"
 	"github.com/ethereum/go-ethereum/core/state"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/eth/downloader"
-	"github.com/ethereum/go-ethereum/eth/filters"
 	"github.com/ethereum/go-ethereum/eth/gasprice"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
@@ -196,28 +196,13 @@ func (b *EthApiBackend) AccountManager() *accounts.Manager {
 	return b.eth.AccountManager()
 }
 
-func (b *EthApiBackend) GetBloomBits(ctx context.Context, bitIdx uint64, sectionIdxList []uint64) ([][]byte, error) {
+func (b *EthApiBackend) BloomStatus() (uint64, uint64) {
-	results := make([][]byte, len(sectionIdxList))
+	sections, _, _ := b.eth.bloomIndexer.Sections()
-	var err error
+	return params.BloomBitsBlocks, sections
-	for i, sectionIdx := range sectionIdxList {
-		sectionHead := core.GetCanonicalHash(b.eth.chainDb, (sectionIdx+1)*bloomBitsSection-1)
-		results[i], err = core.GetBloomBits(b.eth.chainDb, bitIdx, sectionIdx, sectionHead)
-		if err != nil {
-			return nil, err
-		}
-	}
-	return results, nil
-}
-
-func (b *EthApiBackend) BloomBitsSections() uint64 {
-	sections, _, _ := b.eth.bbIndexer.Sections()
-	return sections
 }
 
-func (b *EthApiBackend) BloomBitsConfig() filters.BloomConfig {
+func (b *EthApiBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
-	return filters.BloomConfig{
+	for i := 0; i < bloomFilterThreads; i++ {
-		SectionSize:    bloomBitsSection,
+		go session.Multiplex(bloomRetrievalBatch, bloomRetrievalWait, b.eth.bloomRequests)
-		MaxRequestLen:  16,
-		MaxRequestWait: 0,
 	}
 }

eth/backend.go

@@ -32,6 +32,7 @@ import (
 	"github.com/ethereum/go-ethereum/consensus/clique"
 	"github.com/ethereum/go-ethereum/consensus/ethash"
 	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/core/bloombits"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/eth/downloader"
@@ -77,7 +78,8 @@ type Ethereum struct {
 	engine         consensus.Engine
 	accountManager *accounts.Manager
 
-	bbIndexer *core.ChainIndexer
+	bloomRequests chan chan *bloombits.Retrieval // Channel receiving bloom data retrieval requests
+	bloomIndexer  *core.ChainIndexer             // Bloom indexer operating during block imports
 
 	ApiBackend *EthApiBackend
 
@@ -127,7 +129,8 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
 		networkId:      config.NetworkId,
 		gasPrice:       config.GasPrice,
 		etherbase:      config.Etherbase,
-		bbIndexer:      NewBloomBitsProcessor(chainDb, bloomBitsSection),
+		bloomRequests:  make(chan chan *bloombits.Retrieval),
+		bloomIndexer:   NewBloomIndexer(chainDb, params.BloomBitsBlocks),
 	}
 
 	log.Info("Initialising Ethereum protocol", "versions", ProtocolVersions, "network", config.NetworkId)
@@ -151,7 +154,7 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
 		eth.blockchain.SetHead(compat.RewindTo)
 		core.WriteChainConfig(chainDb, genesisHash, chainConfig)
 	}
-	eth.bbIndexer.Start(eth.blockchain)
+	eth.bloomIndexer.Start(eth.blockchain.CurrentHeader(), eth.blockchain.SubscribeChainEvent)
 
 	if config.TxPool.Journal != "" {
 		config.TxPool.Journal = ctx.ResolvePath(config.TxPool.Journal)
@@ -261,7 +264,7 @@ func (s *Ethereum) APIs() []rpc.API {
 		}, {
 			Namespace: "eth",
 			Version:   "1.0",
-			Service:   filters.NewPublicFilterAPI(s.ApiBackend, false, bloomBitsSection),
+			Service:   filters.NewPublicFilterAPI(s.ApiBackend, false),
 			Public:    true,
 		}, {
 			Namespace: "admin",
@@ -359,14 +362,17 @@ func (s *Ethereum) Downloader() *downloader.Downloader { return s.protocolManage
 func (s *Ethereum) Protocols() []p2p.Protocol {
 	if s.lesServer == nil {
 		return s.protocolManager.SubProtocols
-	} else {
-		return append(s.protocolManager.SubProtocols, s.lesServer.Protocols()...)
 	}
+	return append(s.protocolManager.SubProtocols, s.lesServer.Protocols()...)
 }
 
 // Start implements node.Service, starting all internal goroutines needed by the
 // Ethereum protocol implementation.
 func (s *Ethereum) Start(srvr *p2p.Server) error {
+	// Start the bloom bits servicing goroutines
+	s.startBloomHandlers()
+
+	// Start the RPC service
 	s.netRPCService = ethapi.NewPublicNetAPI(srvr, s.NetVersion())
 
 	// Figure out a max peers count based on the server limits
@@ -377,6 +383,7 @@ func (s *Ethereum) Start(srvr *p2p.Server) error {
 			maxPeers = srvr.MaxPeers / 2
 		}
 	}
+	// Start the networking layer and the light server if requested
 	s.protocolManager.Start(maxPeers)
 	if s.lesServer != nil {
 		s.lesServer.Start(srvr)
@@ -390,7 +397,7 @@ func (s *Ethereum) Stop() error {
 	if s.stopDbUpgrade != nil {
 		s.stopDbUpgrade()
 	}
-	s.bbIndexer.Close()
+	s.bloomIndexer.Close()
 	s.blockchain.Stop()
 	s.protocolManager.Stop()
 	if s.lesServer != nil {

eth/bloombits.go

@@ -0,0 +1,142 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package eth
+
+import (
+	"time"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/bitutil"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/core/bloombits"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/ethdb"
+	"github.com/ethereum/go-ethereum/params"
+)
+
+const (
+	// bloomServiceThreads is the number of goroutines used globally by an Ethereum
+	// instance to service bloombits lookups for all running filters.
+	bloomServiceThreads = 16
+
+	// bloomFilterThreads is the number of goroutines used locally per filter to
+	// multiplex requests onto the global servicing goroutines.
+	bloomFilterThreads = 3
+
+	// bloomRetrievalBatch is the maximum number of bloom bit retrievals to service
+	// in a single batch.
+	bloomRetrievalBatch = 16
+
+	// bloomRetrievalWait is the maximum time to wait for enough bloom bit requests
+	// to accumulate request an entire batch (avoiding hysteresis).
+	bloomRetrievalWait = time.Duration(0)
+)
+
+// startBloomHandlers starts a batch of goroutines to accept bloom bit database
+// retrievals from possibly a range of filters and serving the data to satisfy.
+func (eth *Ethereum) startBloomHandlers() {
+	for i := 0; i < bloomServiceThreads; i++ {
+		go func() {
+			for {
+				select {
+				case <-eth.shutdownChan:
+					return
+
+				case request := <-eth.bloomRequests:
+					task := <-request
+
+					task.Bitsets = make([][]byte, len(task.Sections))
+					for i, section := range task.Sections {
+						head := core.GetCanonicalHash(eth.chainDb, (section+1)*params.BloomBitsBlocks-1)
+						blob, err := bitutil.DecompressBytes(core.GetBloomBits(eth.chainDb, task.Bit, section, head), int(params.BloomBitsBlocks)/8)
+						if err != nil {
+							panic(err)
+						}
+						task.Bitsets[i] = blob
+					}
+					request <- task
+				}
+			}
+		}()
+	}
+}
+
+const (
+	// bloomConfirms is the number of confirmation blocks before a bloom section is
+	// considered probably final and its rotated bits are calculated.
+	bloomConfirms = 256
+
+	// bloomThrottling is the time to wait between processing two consecutive index
+	// sections. It's useful during chain upgrades to prevent disk overload.
+	bloomThrottling = 100 * time.Millisecond
+)
+
+// BloomIndexer implements a core.ChainIndexer, building up a rotated bloom bits index
+// for the Ethereum header bloom filters, permitting blazing fast filtering.
+type BloomIndexer struct {
+	size uint64 // section size to generate bloombits for
+
+	db  ethdb.Database       // database instance to write index data and metadata into
+	gen *bloombits.Generator // generator to rotate the bloom bits crating the bloom index
+
+	section uint64      // Section is the section number being processed currently
+	head    common.Hash // Head is the hash of the last header processed
+}
+
+// NewBloomIndexer returns a chain indexer that generates bloom bits data for the
+// canonical chain for fast logs filtering.
+func NewBloomIndexer(db ethdb.Database, size uint64) *core.ChainIndexer {
+	backend := &BloomIndexer{
+		db:   db,
+		size: size,
+	}
+	table := ethdb.NewTable(db, string(core.BloomBitsIndexPrefix))
+
+	return core.NewChainIndexer(db, table, backend, size, bloomConfirms, bloomThrottling, "bloombits")
+}
+
+// Reset implements core.ChainIndexerBackend, starting a new bloombits index
+// section.
+func (b *BloomIndexer) Reset(section uint64) {
+	gen, err := bloombits.NewGenerator(uint(b.size))
+	if err != nil {
+		panic(err)
+	}
+	b.gen, b.section, b.head = gen, section, common.Hash{}
+}
+
+// Process implements core.ChainIndexerBackend, adding a new header's bloom into
+// the index.
+func (b *BloomIndexer) Process(header *types.Header) {
+	b.gen.AddBloom(header.Bloom)
+	b.head = header.Hash()
+}
+
+// Commit implements core.ChainIndexerBackend, finalizing the bloom section and
+// writing it out into the database.
+func (b *BloomIndexer) Commit() error {
+	batch := b.db.NewBatch()
+
+	for i := 0; i < types.BloomBitLength; i++ {
+		bits, err := b.gen.Bitset(uint(i))
+		if err != nil {
+			return err
+		}
+		core.WriteBloomBits(batch, uint(i), b.section, b.head, bitutil.CompressBytes(bits))
+	}
+	return batch.Write()
+}

eth/db_upgrade.go

@@ -22,10 +22,7 @@ import (
 	"time"
 
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/common/bitutil"
 	"github.com/ethereum/go-ethereum/core"
-	"github.com/ethereum/go-ethereum/core/bloombits"
-	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/rlp"
@@ -136,38 +133,3 @@ func upgradeDeduplicateData(db ethdb.Database) func() error {
 		return <-errc
 	}
 }
-
-// BloomBitsIndex implements ChainIndex
-type BloomBitsIndex struct {
-	db                   ethdb.Database
-	bc                   *bloombits.BloomBitsCreator
-	section, sectionSize uint64
-	sectionHead          common.Hash
-}
-
-// number of confirmation blocks before a section is considered probably final and its bloom bits are calculated
-const bloomBitsConfirmations = 256
-
-// NewBloomBitsProcessor returns a chain processor that generates bloom bits data for the canonical chain
-func NewBloomBitsProcessor(db ethdb.Database, sectionSize uint64) *core.ChainIndexer {
-	backend := &BloomBitsIndex{db: db, sectionSize: sectionSize}
-	return core.NewChainIndexer(db, ethdb.NewTable(db, "bbIndex-"), backend, sectionSize, bloomBitsConfirmations, time.Millisecond*100, "bloombits")
-}
-
-func (b *BloomBitsIndex) Reset(section uint64, lastSectionHead common.Hash) {
-	b.bc = bloombits.NewBloomBitsCreator(b.sectionSize)
-	b.section = section
-}
-
-func (b *BloomBitsIndex) Process(header *types.Header) {
-	b.bc.AddHeaderBloom(header.Bloom)
-	b.sectionHead = header.Hash()
-}
-
-func (b *BloomBitsIndex) Commit() error {
-	for i := 0; i < bloombits.BloomLength; i++ {
-		compVector := bitutil.CompressBytes(b.bc.GetBitVector(uint(i)))
-		core.StoreBloomBits(b.db, uint64(i), b.section, b.sectionHead, compVector)
-	}
-	return nil
-}

eth/filters/api.go

@@ -51,27 +51,24 @@ type filter struct {
 // PublicFilterAPI offers support to create and manage filters. This will allow external clients to retrieve various
 // information related to the Ethereum protocol such als blocks, transactions and logs.
 type PublicFilterAPI struct {
-	backend          Backend
+	backend   Backend
-	bloomBitsSection uint64
+	mux       *event.TypeMux
-	mux              *event.TypeMux
+	quit      chan struct{}
-	quit             chan struct{}
+	chainDb   ethdb.Database
-	chainDb          ethdb.Database
+	events    *EventSystem
-	events           *EventSystem
+	filtersMu sync.Mutex
-	filtersMu        sync.Mutex
+	filters   map[rpc.ID]*filter
-	filters          map[rpc.ID]*filter
 }
 
 // NewPublicFilterAPI returns a new PublicFilterAPI instance.
-func NewPublicFilterAPI(backend Backend, lightMode bool, bloomBitsSection uint64) *PublicFilterAPI {
+func NewPublicFilterAPI(backend Backend, lightMode bool) *PublicFilterAPI {
 	api := &PublicFilterAPI{
-		backend:          backend,
+		backend: backend,
-		bloomBitsSection: bloomBitsSection,
+		mux:     backend.EventMux(),
-		mux:              backend.EventMux(),
+		chainDb: backend.ChainDb(),
-		chainDb:          backend.ChainDb(),
+		events:  NewEventSystem(backend.EventMux(), backend, lightMode),
-		events:           NewEventSystem(backend.EventMux(), backend, lightMode),
+		filters: make(map[rpc.ID]*filter),
-		filters:          make(map[rpc.ID]*filter),
 	}
-
 	go api.timeoutLoop()
 
 	return api
@@ -326,16 +323,20 @@ func (api *PublicFilterAPI) NewFilter(crit FilterCriteria) (rpc.ID, error) {
 //
 // https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getlogs
 func (api *PublicFilterAPI) GetLogs(ctx context.Context, crit FilterCriteria) ([]*types.Log, error) {
+	// Convert the RPC block numbers into internal representations
 	if crit.FromBlock == nil {
 		crit.FromBlock = big.NewInt(rpc.LatestBlockNumber.Int64())
 	}
 	if crit.ToBlock == nil {
 		crit.ToBlock = big.NewInt(rpc.LatestBlockNumber.Int64())
 	}
-
+	// Create and run the filter to get all the logs
 	filter := New(api.backend, crit.FromBlock.Int64(), crit.ToBlock.Int64(), crit.Addresses, crit.Topics)
 
-	logs, err := filter.Find(ctx)
+	logs, err := filter.Logs(ctx)
+	if err != nil {
+		return nil, err
+	}
 	return returnLogs(logs), err
 }
 
@@ -369,20 +370,18 @@ func (api *PublicFilterAPI) GetFilterLogs(ctx context.Context, id rpc.ID) ([]*ty
 		return nil, fmt.Errorf("filter not found")
 	}
 
-	var begin, end int64
+	begin := rpc.LatestBlockNumber.Int64()
 	if f.crit.FromBlock != nil {
 		begin = f.crit.FromBlock.Int64()
-	} else {
-		begin = rpc.LatestBlockNumber.Int64()
 	}
+	end := rpc.LatestBlockNumber.Int64()
 	if f.crit.ToBlock != nil {
 		end = f.crit.ToBlock.Int64()
-	} else {
-		end = rpc.LatestBlockNumber.Int64()
 	}
+	// Create and run the filter to get all the logs
 	filter := New(api.backend, begin, end, f.crit.Addresses, f.crit.Topics)
 
-	logs, err := filter.Find(ctx)
+	logs, err := filter.Logs(ctx)
 	if err != nil {
 		return nil, err
 	}
@@ -390,7 +389,7 @@ func (api *PublicFilterAPI) GetFilterLogs(ctx context.Context, id rpc.ID) ([]*ty
 }
 
 // GetFilterChanges returns the logs for the filter with the given id since
-// last time is was called. This can be used for polling.
+// last time it was called. This can be used for polling.
 //
 // For pending transaction and block filters the result is []common.Hash.
 // (pending)Log filters return []Log.

eth/filters/bench_test.go

@@ -31,82 +31,41 @@ import (
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/node"
-	"github.com/golang/snappy"
 )
 
 func BenchmarkBloomBits512(b *testing.B) {
-	benchmarkBloomBitsForSize(b, 512)
+	benchmarkBloomBits(b, 512)
 }
 
 func BenchmarkBloomBits1k(b *testing.B) {
-	benchmarkBloomBitsForSize(b, 1024)
+	benchmarkBloomBits(b, 1024)
 }
 
 func BenchmarkBloomBits2k(b *testing.B) {
-	benchmarkBloomBitsForSize(b, 2048)
+	benchmarkBloomBits(b, 2048)
 }
 
 func BenchmarkBloomBits4k(b *testing.B) {
-	benchmarkBloomBitsForSize(b, 4096)
+	benchmarkBloomBits(b, 4096)
 }
 
 func BenchmarkBloomBits8k(b *testing.B) {
-	benchmarkBloomBitsForSize(b, 8192)
+	benchmarkBloomBits(b, 8192)
 }
 
 func BenchmarkBloomBits16k(b *testing.B) {
-	benchmarkBloomBitsForSize(b, 16384)
+	benchmarkBloomBits(b, 16384)
 }
 
 func BenchmarkBloomBits32k(b *testing.B) {
-	benchmarkBloomBitsForSize(b, 32768)
+	benchmarkBloomBits(b, 32768)
-}
-
-func benchmarkBloomBitsForSize(b *testing.B, sectionSize uint64) {
-	benchmarkBloomBits(b, sectionSize, 0)
-	benchmarkBloomBits(b, sectionSize, 1)
-	benchmarkBloomBits(b, sectionSize, 2)
 }
 
 const benchFilterCnt = 2000
 
-func benchmarkBloomBits(b *testing.B, sectionSize uint64, comp int) {
+func benchmarkBloomBits(b *testing.B, sectionSize uint64) {
 	benchDataDir := node.DefaultDataDir() + "/geth/chaindata"
-	fmt.Println("Running bloombits benchmark   section size:", sectionSize, "  compression method:", comp)
+	fmt.Println("Running bloombits benchmark   section size:", sectionSize)
-
-	var (
-		compressFn   func([]byte) []byte
-		decompressFn func([]byte, int) ([]byte, error)
-	)
-	switch comp {
-	case 0:
-		// no compression
-		compressFn = func(data []byte) []byte {
-			return data
-		}
-		decompressFn = func(data []byte, target int) ([]byte, error) {
-			if len(data) != target {
-				panic(nil)
-			}
-			return data, nil
-		}
-	case 1:
-		// bitutil/compress.go
-		compressFn = bitutil.CompressBytes
-		decompressFn = bitutil.DecompressBytes
-	case 2:
-		// go snappy
-		compressFn = func(data []byte) []byte {
-			return snappy.Encode(nil, data)
-		}
-		decompressFn = func(data []byte, target int) ([]byte, error) {
-			decomp, err := snappy.Decode(nil, data)
-			if err != nil || len(decomp) != target {
-				panic(err)
-			}
-			return decomp, nil
-		}
-	}
 
 	db, err := ethdb.NewLDBDatabase(benchDataDir, 128, 1024)
 	if err != nil {
@@ -128,7 +87,10 @@ func benchmarkBloomBits(b *testing.B, sectionSize uint64, comp int) {
 	cnt := (headNum - 512) / sectionSize
 	var dataSize, compSize uint64
 	for sectionIdx := uint64(0); sectionIdx < cnt; sectionIdx++ {
-		bc := bloombits.NewBloomBitsCreator(sectionSize)
+		bc, err := bloombits.NewGenerator(uint(sectionSize))
+		if err != nil {
+			b.Fatalf("failed to create generator: %v", err)
+		}
 		var header *types.Header
 		for i := sectionIdx * sectionSize; i < (sectionIdx+1)*sectionSize; i++ {
 			hash := core.GetCanonicalHash(db, i)
@@ -136,15 +98,18 @@ func benchmarkBloomBits(b *testing.B, sectionSize uint64, comp int) {
 			if header == nil {
 				b.Fatalf("Error creating bloomBits data")
 			}
-			bc.AddHeaderBloom(header.Bloom)
+			bc.AddBloom(header.Bloom)
 		}
 		sectionHead := core.GetCanonicalHash(db, (sectionIdx+1)*sectionSize-1)
-		for i := 0; i < bloombits.BloomLength; i++ {
+		for i := 0; i < types.BloomBitLength; i++ {
-			data := bc.GetBitVector(uint(i))
+			data, err := bc.Bitset(uint(i))
-			comp := compressFn(data)
+			if err != nil {
+				b.Fatalf("failed to retrieve bitset: %v", err)
+			}
+			comp := bitutil.CompressBytes(data)
 			dataSize += uint64(len(data))
 			compSize += uint64(len(comp))
-			core.StoreBloomBits(db, uint64(i), sectionIdx, sectionHead, comp)
+			core.WriteBloomBits(db, uint(i), sectionIdx, sectionHead, comp)
 		}
 		//if sectionIdx%50 == 0 {
 		//	fmt.Println(" section", sectionIdx, "/", cnt)
@@ -171,8 +136,7 @@ func benchmarkBloomBits(b *testing.B, sectionSize uint64, comp int) {
 		addr[0] = byte(i)
 		addr[1] = byte(i / 256)
 		filter := New(backend, 0, int64(cnt*sectionSize-1), []common.Address{addr}, nil)
-		filter.decompress = decompressFn
+		if _, err := filter.Logs(context.Background()); err != nil {
-		if _, err := filter.Find(context.Background()); err != nil {
 			b.Error("filter.Find error:", err)
 		}
 	}
@@ -229,7 +193,7 @@ func BenchmarkNoBloomBits(b *testing.B) {
 	mux := new(event.TypeMux)
 	backend := &testBackend{mux, db, 0, new(event.Feed), new(event.Feed), new(event.Feed), new(event.Feed)}
 	filter := New(backend, 0, int64(headNum), []common.Address{common.Address{}}, nil)
-	filter.Find(context.Background())
+	filter.Logs(context.Background())
 	d := time.Since(start)
 	fmt.Println("Finished running filter benchmarks")
 	fmt.Println(" ", d, "total  ", d*time.Duration(1000000)/time.Duration(headNum+1), "per million blocks")

eth/filters/filter.go

@@ -19,11 +19,9 @@ package filters
 import (
 	"context"
 	"math/big"
-	"sync"
 	"time"
 
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/common/bitutil"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/bloombits"
 	"github.com/ethereum/go-ethereum/core/types"
@@ -37,140 +35,143 @@ type Backend interface {
 	EventMux() *event.TypeMux
 	HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error)
 	GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error)
-	BloomBitsSections() uint64
+
-	BloomBitsConfig() BloomConfig
 	SubscribeTxPreEvent(chan<- core.TxPreEvent) event.Subscription
 	SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription
 	SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription
 	SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription
-	GetBloomBits(ctx context.Context, bitIdx uint64, sectionIdxList []uint64) ([][]byte, error)
-}
 
-type BloomConfig struct {
+	BloomStatus() (uint64, uint64)
-	SectionSize    uint64
+	ServiceFilter(ctx context.Context, session *bloombits.MatcherSession)
-	MaxRequestLen  int
-	MaxRequestWait time.Duration
 }
 
 // Filter can be used to retrieve and filter logs.
 type Filter struct {
-	backend         Backend
+	backend Backend
-	bloomBitsConfig BloomConfig
 
 	db         ethdb.Database
 	begin, end int64
 	addresses  []common.Address
 	topics     [][]common.Hash
 
-	decompress func([]byte, int) ([]byte, error)
+	matcher *bloombits.Matcher
-	matcher    *bloombits.Matcher
 }
 
 // New creates a new filter which uses a bloom filter on blocks to figure out whether
 // a particular block is interesting or not.
 func New(backend Backend, begin, end int64, addresses []common.Address, topics [][]common.Hash) *Filter {
+	size, _ := backend.BloomStatus()
+
 	return &Filter{
-		backend:         backend,
+		backend:   backend,
-		begin:           begin,
+		begin:     begin,
-		end:             end,
+		end:       end,
-		addresses:       addresses,
+		addresses: addresses,
-		topics:          topics,
+		topics:    topics,
-		bloomBitsConfig: backend.BloomBitsConfig(),
+		db:        backend.ChainDb(),
-		db:              backend.ChainDb(),
+		matcher:   bloombits.NewMatcher(size, addresses, topics),
-		matcher:         bloombits.NewMatcher(backend.BloomBitsConfig().SectionSize, addresses, topics),
-		decompress:      bitutil.DecompressBytes,
 	}
 }
 
-// FindOnce searches the blockchain for matching log entries, returning
+// Logs searches the blockchain for matching log entries, returning all from the
-// all matching entries from the first block that contains matches,
+// first block that contains matches, updating the start of the filter accordingly.
-// updating the start point of the filter accordingly. If no results are
+func (f *Filter) Logs(ctx context.Context) ([]*types.Log, error) {
-// found, a nil slice is returned.
+	// Figure out the limits of the filter range
-func (f *Filter) FindOnce(ctx context.Context) ([]*types.Log, error) {
+	header, _ := f.backend.HeaderByNumber(ctx, rpc.LatestBlockNumber)
-	head, _ := f.backend.HeaderByNumber(ctx, rpc.LatestBlockNumber)
+	if header == nil {
-	if head == nil {
 		return nil, nil
 	}
-	headBlockNumber := head.Number.Uint64()
+	head := header.Number.Uint64()
 
-	var beginBlockNo uint64 = uint64(f.begin)
 	if f.begin == -1 {
-		beginBlockNo = headBlockNumber
+		f.begin = int64(head)
 	}
-	var endBlockNo uint64 = uint64(f.end)
+	end := uint64(f.end)
 	if f.end == -1 {
-		endBlockNo = headBlockNumber
+		end = head
 	}
-
+	// Gather all indexed logs, and finish with non indexed ones
-	logs, blockNumber, err := f.getLogs(ctx, beginBlockNo, endBlockNo)
+	var (
-	f.begin = int64(blockNumber + 1)
+		logs []*types.Log
-	return logs, err
+		err  error
-}
+	)
-
+	size, sections := f.backend.BloomStatus()
-// Run filters logs with the current parameters set
+	if indexed := sections * size; indexed > uint64(f.begin) {
-func (f *Filter) Find(ctx context.Context) (logs []*types.Log, err error) {
+		if indexed > end {
-	for {
+			logs, err = f.indexedLogs(ctx, end)
-		newLogs, err := f.FindOnce(ctx)
+		} else {
-		if len(newLogs) == 0 || err != nil {
+			logs, err = f.indexedLogs(ctx, indexed-1)
+		}
+		if err != nil {
 			return logs, err
 		}
-		logs = append(logs, newLogs...)
 	}
+	rest, err := f.unindexedLogs(ctx, end)
+	logs = append(logs, rest...)
+	return logs, err
 }
 
-// nextRequest returns the next request to retrieve for the bloombits matcher
+// indexedLogs returns the logs matching the filter criteria based on the bloom
-func (f *Filter) nextRequest() (bloombits uint, sections []uint64) {
+// bits indexed available locally or via the network.
-	bloomIndex, ok := f.matcher.AllocSectionQueue()
+func (f *Filter) indexedLogs(ctx context.Context, end uint64) ([]*types.Log, error) {
-	if !ok {
+	// Create a matcher session and request servicing from the backend
-		return 0, nil
+	matches := make(chan uint64, 64)
+
+	session, err := f.matcher.Start(uint64(f.begin), end, matches)
+	if err != nil {
+		return nil, err
 	}
-	if f.bloomBitsConfig.MaxRequestWait > 0 &&
+	defer session.Close(time.Second)
-		(f.bloomBitsConfig.MaxRequestLen <= 1 || // SectionCount is always greater than zero after a successful alloc
+
-			f.matcher.SectionCount(bloomIndex) < f.bloomBitsConfig.MaxRequestLen) {
+	f.backend.ServiceFilter(ctx, session)
-		time.Sleep(f.bloomBitsConfig.MaxRequestWait)
+
+	// Iterate over the matches until exhausted or context closed
+	var logs []*types.Log
+
+	for {
+		select {
+		case number, ok := <-matches:
+			// Abort if all matches have been fulfilled
+			if !ok {
+				f.begin = int64(end) + 1
+				return logs, nil
+			}
+			// Retrieve the suggested block and pull any truly matching logs
+			header, err := f.backend.HeaderByNumber(ctx, rpc.BlockNumber(number))
+			if header == nil || err != nil {
+				return logs, err
+			}
+			found, err := f.checkMatches(ctx, header)
+			if err != nil {
+				return logs, err
+			}
+			logs = append(logs, found...)
+
+		case <-ctx.Done():
+			return logs, ctx.Err()
+		}
 	}
-	return bloomIndex, f.matcher.FetchSections(bloomIndex, f.bloomBitsConfig.MaxRequestLen)
 }
 
-// serveMatcher serves the bloombits matcher by fetching the requested vectors
+// indexedLogs returns the logs matching the filter criteria based on raw block
-// through the filter backend
+// iteration and bloom matching.
-func (f *Filter) serveMatcher(ctx context.Context, stop chan struct{}, wg *sync.WaitGroup) chan error {
+func (f *Filter) unindexedLogs(ctx context.Context, end uint64) ([]*types.Log, error) {
-	errChn := make(chan error, 1)
+	var logs []*types.Log
-	wg.Add(10)
+
-	for i := 0; i < 10; i++ {
+	for ; f.begin <= int64(end); f.begin++ {
-		go func(i int) {
+		header, err := f.backend.HeaderByNumber(ctx, rpc.BlockNumber(f.begin))
-			defer wg.Done()
+		if header == nil || err != nil {
-
+			return logs, err
-			for {
+		}
-				b, s := f.nextRequest()
+		if bloomFilter(header.Bloom, f.addresses, f.topics) {
-				if s == nil {
+			found, err := f.checkMatches(ctx, header)
-					return
+			if err != nil {
-				}
+				return logs, err
-				data, err := f.backend.GetBloomBits(ctx, uint64(b), s)
-				if err != nil {
-					select {
-					case errChn <- err:
-					case <-stop:
-					}
-					return
-				}
-				decomp := make([][]byte, len(data))
-				for i, d := range data {
-					var err error
-					if decomp[i], err = f.decompress(d, int(f.bloomBitsConfig.SectionSize/8)); err != nil {
-						select {
-						case errChn <- err:
-						case <-stop:
-						}
-						return
-					}
-				}
-				f.matcher.Deliver(b, s, decomp)
 			}
-		}(i)
+			logs = append(logs, found...)
+		}
 	}
-
+	return logs, nil
-	return errChn
 }
 
 // checkMatches checks if the receipts belonging to the given header contain any log events that
@@ -192,83 +193,6 @@ func (f *Filter) checkMatches(ctx context.Context, header *types.Header) (logs [
 	return nil, nil
 }
 
-func (f *Filter) getLogs(ctx context.Context, start, end uint64) (logs []*types.Log, blockNumber uint64, err error) {
-	haveBloomBitsBefore := f.backend.BloomBitsSections() * f.bloomBitsConfig.SectionSize
-	if haveBloomBitsBefore > start {
-		e := end
-		if haveBloomBitsBefore <= e {
-			e = haveBloomBitsBefore - 1
-		}
-
-		stop := make(chan struct{})
-		var wg sync.WaitGroup
-		matches := f.matcher.Start(start, e)
-		errChn := f.serveMatcher(ctx, stop, &wg)
-
-		defer func() {
-			f.matcher.Stop()
-			close(stop)
-			wg.Wait()
-		}()
-
-	loop:
-		for {
-			select {
-			case i, ok := <-matches:
-				if !ok {
-					break loop
-				}
-
-				blockNumber := rpc.BlockNumber(i)
-				header, err := f.backend.HeaderByNumber(ctx, blockNumber)
-				if header == nil || err != nil {
-					return logs, end, err
-				}
-
-				logs, err := f.checkMatches(ctx, header)
-				if err != nil {
-					return nil, end, err
-				}
-				if logs != nil {
-					return logs, i, nil
-				}
-			case err := <-errChn:
-				return logs, end, err
-			case <-ctx.Done():
-				return nil, end, ctx.Err()
-			}
-		}
-
-		if end < haveBloomBitsBefore {
-			return logs, end, nil
-		}
-		start = haveBloomBitsBefore
-	}
-
-	// search the rest with regular block-by-block bloom filtering
-	for i := start; i <= end; i++ {
-		blockNumber := rpc.BlockNumber(i)
-		header, err := f.backend.HeaderByNumber(ctx, blockNumber)
-		if header == nil || err != nil {
-			return logs, end, err
-		}
-
-		// Use bloom filtering to see if this block is interesting given the
-		// current parameters
-		if f.bloomFilter(header.Bloom) {
-			logs, err := f.checkMatches(ctx, header)
-			if err != nil {
-				return nil, end, err
-			}
-			if logs != nil {
-				return logs, i, nil
-			}
-		}
-	}
-
-	return logs, end, nil
-}
-
 func includes(addresses []common.Address, a common.Address) bool {
 	for _, addr := range addresses {
 		if addr == a {
@@ -323,10 +247,6 @@ Logs:
 	return ret
 }
 
-func (f *Filter) bloomFilter(bloom types.Bloom) bool {
-	return bloomFilter(bloom, f.addresses, f.topics)
-}
-
 func bloomFilter(bloom types.Bloom, addresses []common.Address, topics [][]common.Hash) bool {
 	if len(addresses) > 0 {
 		var included bool

eth/filters/filter_system_test.go

@@ -20,12 +20,14 @@ import (
 	"context"
 	"fmt"
 	"math/big"
+	"math/rand"
 	"reflect"
 	"testing"
 	"time"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/core/bloombits"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
@@ -85,29 +87,35 @@ func (b *testBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subsc
 	return b.chainFeed.Subscribe(ch)
 }
 
-func (b *testBackend) GetBloomBits(ctx context.Context, bitIdx uint64, sectionIdxList []uint64) ([][]byte, error) {
+func (b *testBackend) BloomStatus() (uint64, uint64) {
-	results := make([][]byte, len(sectionIdxList))
+	return params.BloomBitsBlocks, b.sections
-	var err error
-	for i, sectionIdx := range sectionIdxList {
-		sectionHead := core.GetCanonicalHash(b.db, (sectionIdx+1)*testBloomBitsSection-1)
-		results[i], err = core.GetBloomBits(b.db, bitIdx, sectionIdx, sectionHead)
-		if err != nil {
-			return nil, err
-		}
-	}
-	return results, nil
 }
 
-func (b *testBackend) BloomBitsSections() uint64 {
+func (b *testBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
-	return b.sections
+	requests := make(chan chan *bloombits.Retrieval)
-}
 
-func (b *testBackend) BloomBitsConfig() BloomConfig {
+	go session.Multiplex(16, 0, requests)
-	return BloomConfig{
+	go func() {
-		SectionSize:    testBloomBitsSection,
+		for {
-		MaxRequestLen:  16,
+			// Wait for a service request or a shutdown
-		MaxRequestWait: 0,
+			select {
-	}
+			case <-ctx.Done():
+				return
+
+			case request := <-requests:
+				task := <-request
+
+				task.Bitsets = make([][]byte, len(task.Sections))
+				for i, section := range task.Sections {
+					if rand.Int()%4 != 0 { // Handle occasional missing deliveries
+						head := core.GetCanonicalHash(b.db, (section+1)*params.BloomBitsBlocks-1)
+						task.Bitsets[i] = core.GetBloomBits(b.db, task.Bit, section, head)
+					}
+				}
+				request <- task
+			}
+		}
+	}()
 }
 
 // TestBlockSubscription tests if a block subscription returns block hashes for posted chain events.
@@ -126,7 +134,7 @@ func TestBlockSubscription(t *testing.T) {
 		logsFeed    = new(event.Feed)
 		chainFeed   = new(event.Feed)
 		backend     = &testBackend{mux, db, 0, txFeed, rmLogsFeed, logsFeed, chainFeed}
-		api         = NewPublicFilterAPI(backend, false, 0)
+		api         = NewPublicFilterAPI(backend, false)
 		genesis     = new(core.Genesis).MustCommit(db)
 		chain, _    = core.GenerateChain(params.TestChainConfig, genesis, db, 10, func(i int, gen *core.BlockGen) {})
 		chainEvents = []core.ChainEvent{}
@@ -183,7 +191,7 @@ func TestPendingTxFilter(t *testing.T) {
 		logsFeed   = new(event.Feed)
 		chainFeed  = new(event.Feed)
 		backend    = &testBackend{mux, db, 0, txFeed, rmLogsFeed, logsFeed, chainFeed}
-		api        = NewPublicFilterAPI(backend, false, 0)
+		api        = NewPublicFilterAPI(backend, false)
 
 		transactions = []*types.Transaction{
 			types.NewTransaction(0, common.HexToAddress("0xb794f5ea0ba39494ce83a213fffba74279579268"), new(big.Int), new(big.Int), new(big.Int), nil),
@@ -246,7 +254,7 @@ func TestLogFilterCreation(t *testing.T) {
 		logsFeed   = new(event.Feed)
 		chainFeed  = new(event.Feed)
 		backend    = &testBackend{mux, db, 0, txFeed, rmLogsFeed, logsFeed, chainFeed}
-		api        = NewPublicFilterAPI(backend, false, 0)
+		api        = NewPublicFilterAPI(backend, false)
 
 		testCases = []struct {
 			crit    FilterCriteria
@@ -295,7 +303,7 @@ func TestInvalidLogFilterCreation(t *testing.T) {
 		logsFeed   = new(event.Feed)
 		chainFeed  = new(event.Feed)
 		backend    = &testBackend{mux, db, 0, txFeed, rmLogsFeed, logsFeed, chainFeed}
-		api        = NewPublicFilterAPI(backend, false, 0)
+		api        = NewPublicFilterAPI(backend, false)
 	)
 
 	// different situations where log filter creation should fail.
@@ -325,7 +333,7 @@ func TestLogFilter(t *testing.T) {
 		logsFeed   = new(event.Feed)
 		chainFeed  = new(event.Feed)
 		backend    = &testBackend{mux, db, 0, txFeed, rmLogsFeed, logsFeed, chainFeed}
-		api        = NewPublicFilterAPI(backend, false, 0)
+		api        = NewPublicFilterAPI(backend, false)
 
 		firstAddr      = common.HexToAddress("0x1111111111111111111111111111111111111111")
 		secondAddr     = common.HexToAddress("0x2222222222222222222222222222222222222222")
@@ -442,7 +450,7 @@ func TestPendingLogsSubscription(t *testing.T) {
 		logsFeed   = new(event.Feed)
 		chainFeed  = new(event.Feed)
 		backend    = &testBackend{mux, db, 0, txFeed, rmLogsFeed, logsFeed, chainFeed}
-		api        = NewPublicFilterAPI(backend, false, 0)
+		api        = NewPublicFilterAPI(backend, false)
 
 		firstAddr      = common.HexToAddress("0x1111111111111111111111111111111111111111")
 		secondAddr     = common.HexToAddress("0x2222222222222222222222222222222222222222")

eth/filters/filter_test.go

@@ -32,8 +32,6 @@ import (
 	"github.com/ethereum/go-ethereum/params"
 )
 
-const testBloomBitsSection = 4096
-
 func makeReceipt(addr common.Address) *types.Receipt {
 	receipt := types.NewReceipt(nil, false, new(big.Int))
 	receipt.Logs = []*types.Log{
@@ -101,7 +99,7 @@ func BenchmarkFilters(b *testing.B) {
 	filter := New(backend, 0, -1, []common.Address{addr1, addr2, addr3, addr4}, nil)
 
 	for i := 0; i < b.N; i++ {
-		logs, _ := filter.Find(context.Background())
+		logs, _ := filter.Logs(context.Background())
 		if len(logs) != 4 {
 			b.Fatal("expected 4 logs, got", len(logs))
 		}
@@ -189,13 +187,13 @@ func TestFilters(t *testing.T) {
 
 	filter := New(backend, 0, -1, []common.Address{addr}, [][]common.Hash{{hash1, hash2, hash3, hash4}})
 
-	logs, _ := filter.Find(context.Background())
+	logs, _ := filter.Logs(context.Background())
 	if len(logs) != 4 {
 		t.Error("expected 4 log, got", len(logs))
 	}
 
 	filter = New(backend, 900, 999, []common.Address{addr}, [][]common.Hash{{hash3}})
-	logs, _ = filter.Find(context.Background())
+	logs, _ = filter.Logs(context.Background())
 	if len(logs) != 1 {
 		t.Error("expected 1 log, got", len(logs))
 	}
@@ -204,7 +202,7 @@ func TestFilters(t *testing.T) {
 	}
 
 	filter = New(backend, 990, -1, []common.Address{addr}, [][]common.Hash{{hash3}})
-	logs, _ = filter.Find(context.Background())
+	logs, _ = filter.Logs(context.Background())
 	if len(logs) != 1 {
 		t.Error("expected 1 log, got", len(logs))
 	}
@@ -214,7 +212,7 @@ func TestFilters(t *testing.T) {
 
 	filter = New(backend, 1, 10, nil, [][]common.Hash{{hash1, hash2}})
 
-	logs, _ = filter.Find(context.Background())
+	logs, _ = filter.Logs(context.Background())
 	if len(logs) != 2 {
 		t.Error("expected 2 log, got", len(logs))
 	}
@@ -222,7 +220,7 @@ func TestFilters(t *testing.T) {
 	failHash := common.BytesToHash([]byte("fail"))
 	filter = New(backend, 0, -1, nil, [][]common.Hash{{failHash}})
 
-	logs, _ = filter.Find(context.Background())
+	logs, _ = filter.Logs(context.Background())
 	if len(logs) != 0 {
 		t.Error("expected 0 log, got", len(logs))
 	}
@@ -230,14 +228,14 @@ func TestFilters(t *testing.T) {
 	failAddr := common.BytesToAddress([]byte("failmenow"))
 	filter = New(backend, 0, -1, []common.Address{failAddr}, nil)
 
-	logs, _ = filter.Find(context.Background())
+	logs, _ = filter.Logs(context.Background())
 	if len(logs) != 0 {
 		t.Error("expected 0 log, got", len(logs))
 	}
 
 	filter = New(backend, 0, -1, nil, [][]common.Hash{{failHash}, {hash1}})
 
-	logs, _ = filter.Find(context.Background())
+	logs, _ = filter.Logs(context.Background())
 	if len(logs) != 0 {
 		t.Error("expected 0 log, got", len(logs))
 	}

eth/handler.go

@@ -49,8 +49,6 @@ const (
 	// txChanSize is the size of channel listening to TxPreEvent.
 	// The number is referenced from the size of tx pool.
 	txChanSize = 4096
-
-	bloomBitsSection = 4096
 )
 
 var (
@@ -94,8 +92,6 @@ type ProtocolManager struct {
 	quitSync    chan struct{}
 	noMorePeers chan struct{}
 
-	lesServer LesServer
-
 	// wait group is used for graceful shutdowns during downloading
 	// and processing
 	wg sync.WaitGroup
@@ -118,7 +114,6 @@ func NewProtocolManager(config *params.ChainConfig, mode downloader.SyncMode, ne
 		txsyncCh:    make(chan *txsync),
 		quitSync:    make(chan struct{}),
 	}
-
 	// Figure out whether to allow fast sync or not
 	if mode == downloader.FastSync && blockchain.CurrentBlock().NumberU64() > 0 {
 		log.Warn("Blockchain not empty, fast sync disabled")

les/api_backend.go

@@ -19,17 +19,16 @@ package les
 import (
 	"context"
 	"math/big"
-	"time"
 
 	"github.com/ethereum/go-ethereum/accounts"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/math"
 	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/core/bloombits"
 	"github.com/ethereum/go-ethereum/core/state"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/eth/downloader"
-	"github.com/ethereum/go-ethereum/eth/filters"
 	"github.com/ethereum/go-ethereum/eth/gasprice"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
@@ -174,18 +173,9 @@ func (b *LesApiBackend) AccountManager() *accounts.Manager {
 	return b.eth.accountManager
 }
 
-func (b *LesApiBackend) GetBloomBits(ctx context.Context, bitIdx uint64, sectionIdxList []uint64) ([][]byte, error) {
+func (b *LesApiBackend) BloomStatus() (uint64, uint64) {
-	return nil, nil // implemented in a subsequent PR
+	return params.BloomBitsBlocks, 0
 }
 
-func (b *LesApiBackend) BloomBitsSections() uint64 {
+func (b *LesApiBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
-	return 0
-}
-
-func (b *LesApiBackend) BloomBitsConfig() filters.BloomConfig {
-	return filters.BloomConfig{
-		SectionSize:    32768,
-		MaxRequestLen:  16,
-		MaxRequestWait: time.Microsecond * 100,
-	}
 }

les/backend.go

@@ -169,7 +169,7 @@ func (s *LightEthereum) APIs() []rpc.API {
 		}, {
 			Namespace: "eth",
 			Version:   "1.0",
-			Service:   filters.NewPublicFilterAPI(s.ApiBackend, true, 0),
+			Service:   filters.NewPublicFilterAPI(s.ApiBackend, true),
 			Public:    true,
 		}, {
 			Namespace: "net",

params/network_params.go

@@ -0,0 +1,26 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package params
+
+// These are network parameters that need to be constant between clients, but
+// aren't necesarilly consensus related.
+
+const (
+	// BloomBitsBlocks is the number of blocks a single bloom bit section vector
+	// contains.
+	BloomBitsBlocks uint64 = 4096
+)