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core/filtermaps: safe concurrent index update and search

This commit is contained in:
Zsolt Felfoldi 2024-09-19 17:14:27 +02:00
parent 8b5c87e30f
commit 932769e06c
9 changed files with 348 additions and 103 deletions
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65
core/filtermaps/filtermaps.go
View File

@ -1,7 +1,6 @@
package filtermaps
import (
"context"
"crypto/sha256"
"encoding/binary"
"errors"
@ -14,6 +13,7 @@ import (
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/log"
)
@ -28,6 +28,14 @@ const (
headCacheSize = 8 // maximum number of recent filter maps cached in memory
)
// blockchain defines functions required by the FilterMaps log indexer.
type blockchain interface {
CurrentBlock() *types.Header
SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription
GetHeader(hash common.Hash, number uint64) *types.Header
GetCanonicalHash(number uint64) common.Hash
}
// FilterMaps is the in-memory representation of the log index structure that is
// responsible for building and updating the index according to the canonical
// chain.
@ -38,10 +46,10 @@ type FilterMaps struct {
lock sync.RWMutex
db ethdb.Database
closeCh chan chan struct{}
filterMapsRange
chain *core.BlockChain
chain blockchain
matcherSyncCh chan *FilterMapsMatcherBackend
matchers map[*FilterMapsMatcherBackend]struct{}
// filterMapCache caches certain filter maps (headCacheSize most recent maps
// and one tail map) that are expected to be frequently accessed and modified
// while updating the structure. Note that the set of cached maps depends
@ -86,7 +94,7 @@ type filterMapsRange struct {
// NewFilterMaps creates a new FilterMaps and starts the indexer in order to keep
// the structure in sync with the given blockchain.
func NewFilterMaps(db ethdb.Database, chain *core.BlockChain) *FilterMaps {
func NewFilterMaps(db ethdb.Database, chain blockchain) *FilterMaps {
rs, err := rawdb.ReadFilterMapsRange(db)
if err != nil {
log.Error("Error reading log index range", "error", err)
@ -104,6 +112,8 @@ func NewFilterMaps(db ethdb.Database, chain *core.BlockChain) *FilterMaps {
headBlockHash: rs.HeadBlockHash,
tailParentHash: rs.TailParentHash,
},
matcherSyncCh: make(chan *FilterMapsMatcherBackend),
matchers: make(map[*FilterMapsMatcherBackend]struct{}),
filterMapCache: make(map[uint32]*filterMap),
blockPtrCache: lru.NewCache[uint32, uint64](1000),
lvPointerCache: lru.NewCache[uint64, uint64](1000),
@ -129,46 +139,6 @@ func (f *FilterMaps) Close() {
<-ch
}
// FilterMapsMatcherBackend implements MatcherBackend.
type FilterMapsMatcherBackend FilterMaps
// GetFilterMapRow returns the given row of the given map. If the row is empty
// then a non-nil zero length row is returned.
// Note that the returned slices should not be modified, they should be copied
// on write.
// GetFilterMapRow implements MatcherBackend.
func (ff *FilterMapsMatcherBackend) GetFilterMapRow(ctx context.Context, mapIndex, rowIndex uint32) (FilterRow, error) {
f := (*FilterMaps)(ff)
return f.getFilterMapRow(mapIndex, rowIndex)
}
// GetBlockLvPointer returns the starting log value index where the log values
// generated by the given block are located. If blockNumber is beyond the current
// head then the first unoccupied log value index is returned.
// GetBlockLvPointer implements MatcherBackend.
func (ff *FilterMapsMatcherBackend) GetBlockLvPointer(ctx context.Context, blockNumber uint64) (uint64, error) {
f := (*FilterMaps)(ff)
f.lock.RLock()
defer f.lock.RUnlock()
return f.getBlockLvPointer(blockNumber)
}
// GetLogByLvIndex returns the log at the given log value index. If the index does
// not point to the first log value entry of a log then no log and no error are
// returned as this can happen when the log value index was a false positive.
// Note that this function assumes that the log index structure is consistent
// with the canonical chain at the point where the given log value index points.
// If this is not the case then an invalid result or an error may be returned.
// GetLogByLvIndex implements MatcherBackend.
func (ff *FilterMapsMatcherBackend) GetLogByLvIndex(ctx context.Context, lvIndex uint64) (*types.Log, error) {
f := (*FilterMaps)(ff)
f.lock.RLock()
defer f.lock.RUnlock()
return f.getLogByLvIndex(lvIndex)
}
// reset un-initializes the FilterMaps structure and removes all related data from
// the database.
// Note that this function assumes that the read/write lock is being held.
@ -224,6 +194,7 @@ func (f *FilterMaps) setRange(batch ethdb.Batch, newRange filterMapsRange) {
}
rawdb.WriteFilterMapsRange(batch, rs)
f.updateMapCache()
f.updateMatchersValidRange()
}
// updateMapCache updates the maps covered by the filterMapCache according to the
@ -266,7 +237,7 @@ func (f *FilterMaps) updateMapCache() {
// Note that this function assumes that the read lock is being held.
func (f *FilterMaps) getLogByLvIndex(lvIndex uint64) (*types.Log, error) {
if lvIndex < f.tailLvPointer || lvIndex > f.headLvPointer {
return nil, errors.New("log value index outside available range")
return nil, nil
}
// find possible block range based on map to block pointers
mapIndex := uint32(lvIndex >> logValuesPerMap)
@ -321,7 +292,7 @@ func (f *FilterMaps) getLogByLvIndex(lvIndex uint64) (*types.Log, error) {
lvPointer += uint64(len(log.Topics) + 1)
}
}
return nil, errors.New("log value index not found")
return nil, nil
}
// getFilterMapRow returns the given row of the given map. If the row is empty

56
core/filtermaps/indexer.go
View File

@ -22,30 +22,35 @@ const (
// updateLoop initializes and updates the log index structure according to the
// canonical chain.
func (f *FilterMaps) updateLoop() {
headEventCh := make(chan core.ChainHeadEvent)
sub := f.chain.SubscribeChainHeadEvent(headEventCh)
defer sub.Unsubscribe()
var (
headEventCh = make(chan core.ChainHeadEvent)
sub = f.chain.SubscribeChainHeadEvent(headEventCh)
head *types.Header
stop bool
syncMatcher *FilterMapsMatcherBackend
)
head := f.chain.CurrentBlock()
if head == nil {
select {
case ev := <-headEventCh:
head = ev.Block.Header()
case ch := <-f.closeCh:
close(ch)
return
defer func() {
sub.Unsubscribe()
if syncMatcher != nil {
syncMatcher.synced(head)
syncMatcher = nil
}
}
fmr := f.getRange()
}()
var stop bool
wait := func() {
if syncMatcher != nil {
syncMatcher.synced(head)
syncMatcher = nil
}
if stop {
return
}
select {
case ev := <-headEventCh:
head = ev.Block.Header()
case syncMatcher = <-f.matcherSyncCh:
head = f.chain.CurrentBlock()
case <-time.After(time.Second * 20):
// keep updating log index during syncing
head = f.chain.CurrentBlock()
@ -54,10 +59,21 @@ func (f *FilterMaps) updateLoop() {
stop = true
}
}
for head == nil {
wait()
if stop {
return
}
}
fmr := f.getRange()
for !stop {
if !fmr.initialized {
f.tryInit(head)
if syncMatcher != nil {
syncMatcher.synced(head)
syncMatcher = nil
}
fmr = f.getRange()
if !fmr.initialized {
wait()
@ -73,12 +89,18 @@ func (f *FilterMaps) updateLoop() {
continue
}
}
if syncMatcher != nil {
syncMatcher.synced(head)
syncMatcher = nil
}
// log index head is at latest chain head; process tail blocks if possible
f.tryExtendTail(func() bool {
// return true if tail processing needs to be stopped
select {
case ev := <-headEventCh:
head = ev.Block.Header()
case syncMatcher = <-f.matcherSyncCh:
head = f.chain.CurrentBlock()
case ch := <-f.closeCh:
close(ch)
stop = true
@ -549,6 +571,9 @@ func (u *updateBatch) makeRevertPoint() (*revertPoint, error) {
// number from memory cache or from the database if available. If no such revert
// point is available then it returns no result and no error.
func (f *FilterMaps) getRevertPoint(blockNumber uint64) (*revertPoint, error) {
f.lock.RLock()
defer f.lock.RUnlock()
if blockNumber > f.headBlockNumber {
blockNumber = f.headBlockNumber
}
@ -577,6 +602,9 @@ func (f *FilterMaps) getRevertPoint(blockNumber uint64) (*revertPoint, error) {
// revertTo reverts the log index to the given revert point.
func (f *FilterMaps) revertTo(rp *revertPoint) error {
f.lock.Lock()
defer f.lock.Unlock()
batch := f.db.NewBatch()
afterLastMap := uint32((f.headLvPointer + valuesPerMap - 1) >> logValuesPerMap)
if rp.mapIndex >= afterLastMap {

117
core/filtermaps/matcher.go
View File

@ -2,6 +2,7 @@ package filtermaps
import (
"context"
"errors"
"math"
"sync"
"sync/atomic"
@ -18,13 +19,121 @@ type MatcherBackend interface {
GetBlockLvPointer(ctx context.Context, blockNumber uint64) (uint64, error)
GetFilterMapRow(ctx context.Context, mapIndex, rowIndex uint32) (FilterRow, error)
GetLogByLvIndex(ctx context.Context, lvIndex uint64) (*types.Log, error)
SyncLogIndex(ctx context.Context) (SyncRange, error)
Close()
}
// SyncRange is returned by MatcherBackend.SyncLogIndex. It contains the latest
// chain head, the indexed range that is currently consistent with the chain
// and the valid range that has not been changed and has been consistent with
// all states of the chain since the previous SyncLogIndex or the creation of
// the matcher backend.
type SyncRange struct {
Head *types.Header
// block range where the index has not changed since the last matcher sync
// and therefore the set of matches found in this region is guaranteed to
// be valid and complete.
Valid bool
FirstValid, LastValid uint64
// block range indexed according to the given chain head.
Indexed bool
FirstIndexed, LastIndexed uint64
}
// GetPotentialMatches returns a list of logs that are potential matches for the
// given filter criteria. Note that the returned list may still contain false
// positives.
//TODO add protection against reorgs during search
func GetPotentialMatches(ctx context.Context, backend MatcherBackend, firstBlock, lastBlock uint64, addresses []common.Address, topics [][]common.Hash) ([]*types.Log, error) {
// given filter criteria. If parts of the requested range are not indexed then
// an error is returned. If parts of the requested range are changed during the
// search process then potentially incorrect logs are discarded and searched
// again, ensuring that the returned results are always consistent with the latest
// state of the chain.
// If firstBlock or lastBlock are bigger than the head block number then they are
// substituted with the latest head of the chain, ensuring that a search until
// the head block is still consistent with the latest canonical chain if a new
// head has been added during the process.
// Note that the returned list may still contain false positives.
func GetPotentialMatches(ctx context.Context, backend MatcherBackend, firstBlock, lastBlock uint64, addresses []common.Address, topics [][]common.Hash) ([]*types.Log, *types.Header, uint64, uint64, error) {
if firstBlock > lastBlock {
return nil, nil, 0, 0, errors.New("invalid search range")
}
// enforce a consistent state before starting the search in order to be able
// to determine valid range later
syncRange, err := backend.SyncLogIndex(ctx)
if err != nil {
return nil, nil, 0, 0, err
}
headBlock := syncRange.Head.Number.Uint64() // Head is guaranteed != nil
// if haveMatches == true then matches correspond to the block number range
// between matchFirst and matchLast
var (
matches []*types.Log
haveMatches bool
matchFirst, matchLast uint64
)
for !haveMatches || (matchLast < lastBlock && matchLast < headBlock) {
// determine range to be searched; for simplicity we only extend the most
// recent end of the existing match set by matching between searchFirst
// and searchLast.
searchFirst, searchLast := firstBlock, lastBlock
if searchFirst > headBlock {
searchFirst = headBlock
}
if searchLast > headBlock {
searchLast = headBlock
}
if haveMatches && matchFirst != searchFirst {
// searchFirst might change if firstBlock > headBlock
matches, haveMatches = nil, false
}
if haveMatches && matchLast >= searchFirst {
searchFirst = matchLast + 1
}
// check if indexed range covers the requested range
if !syncRange.Indexed || syncRange.FirstIndexed > searchFirst || syncRange.LastIndexed < searchLast {
return nil, nil, 0, 0, errors.New("log index not available for requested range")
}
// search for matches in the required range
newMatches, err := getPotentialMatches(ctx, backend, searchFirst, searchLast, addresses, topics)
if err != nil {
return nil, nil, 0, 0, err
}
// enforce a consistent state again in order to determine the guaranteed
// valid range in which the log index has not been changed since the last
// sync.
syncRange, err = backend.SyncLogIndex(ctx)
if err != nil {
return nil, nil, 0, 0, err
}
headBlock = syncRange.Head.Number.Uint64()
// return with error if the beginning of the recently searched range might
// be invalid due to removed log index
if !syncRange.Valid || syncRange.FirstValid > searchFirst || syncRange.LastValid < searchFirst {
return nil, nil, 0, 0, errors.New("log index not available for requested range")
}
// roll back most recent matches if they are not covered by the guaranteed
// valid range
if syncRange.LastValid < searchLast {
for len(newMatches) > 0 && newMatches[len(newMatches)-1].BlockNumber > syncRange.LastValid {
newMatches = newMatches[:len(newMatches)-1]
}
searchLast = syncRange.LastValid
}
// append new matches to existing ones if the were any
if haveMatches {
matches = append(matches, newMatches...)
} else {
matches, haveMatches = newMatches, true
}
matchLast = searchLast
}
return matches, syncRange.Head, firstBlock, matchLast, nil
}
// getPotentialMatches returns a list of logs that are potential matches for the
// given filter criteria. If parts of the log index in the searched range are
// missing or changed during the search process then the resulting logs belonging
// to that block range might be missing or incorrect.
// Also note that the returned list may contain false positives.
func getPotentialMatches(ctx context.Context, backend MatcherBackend, firstBlock, lastBlock uint64, addresses []common.Address, topics [][]common.Hash) ([]*types.Log, error) {
// find the log value index range to search
firstIndex, err := backend.GetBlockLvPointer(ctx, firstBlock)
if err != nil {

158
core/filtermaps/matcher_backend.go Normal file
View File

@ -0,0 +1,158 @@
package filtermaps
import (
"context"
"errors"
"github.com/ethereum/go-ethereum/core/types"
)
// FilterMapsMatcherBackend implements MatcherBackend.
type FilterMapsMatcherBackend struct {
f *FilterMaps
valid bool
firstValid, lastValid uint64
syncCh chan SyncRange
}
// NewMatcherBackend returns a FilterMapsMatcherBackend after registering it in
// the active matcher set.
// Note that Close should always be called when the matcher is no longer used.
func (f *FilterMaps) NewMatcherBackend() *FilterMapsMatcherBackend {
f.lock.Lock()
defer f.lock.Unlock()
fm := &FilterMapsMatcherBackend{
f: f,
valid: f.initialized,
firstValid: f.tailBlockNumber,
lastValid: f.headBlockNumber,
}
f.matchers[fm] = struct{}{}
return fm
}
// updateMatchersValidRange iterates through active matchers and limits their
// valid range with the current indexed range. This function should be called
// whenever a part of the log index has been removed, before adding new blocks
// to it.
func (f *FilterMaps) updateMatchersValidRange() {
for fm := range f.matchers {
if !f.initialized {
fm.valid = false
}
if !fm.valid {
continue
}
if fm.firstValid < f.tailBlockNumber {
fm.firstValid = f.tailBlockNumber
}
if fm.lastValid > f.headBlockNumber {
fm.lastValid = f.headBlockNumber
}
if fm.firstValid > fm.lastValid {
fm.valid = false
}
}
}
// Close removes the matcher from the set of active matchers and ensures that
// any SyncLogIndex calls are cancelled.
func (fm *FilterMapsMatcherBackend) Close() {
fm.f.lock.Lock()
defer fm.f.lock.Unlock()
delete(fm.f.matchers, fm)
}
// GetFilterMapRow returns the given row of the given map. If the row is empty
// then a non-nil zero length row is returned.
// Note that the returned slices should not be modified, they should be copied
// on write.
// GetFilterMapRow implements MatcherBackend.
func (fm *FilterMapsMatcherBackend) GetFilterMapRow(ctx context.Context, mapIndex, rowIndex uint32) (FilterRow, error) {
return fm.f.getFilterMapRow(mapIndex, rowIndex)
}
// GetBlockLvPointer returns the starting log value index where the log values
// generated by the given block are located. If blockNumber is beyond the current
// head then the first unoccupied log value index is returned.
// GetBlockLvPointer implements MatcherBackend.
func (fm *FilterMapsMatcherBackend) GetBlockLvPointer(ctx context.Context, blockNumber uint64) (uint64, error) {
fm.f.lock.RLock()
defer fm.f.lock.RUnlock()
return fm.f.getBlockLvPointer(blockNumber)
}
// GetLogByLvIndex returns the log at the given log value index.
// Note that this function assumes that the log index structure is consistent
// with the canonical chain at the point where the given log value index points.
// If this is not the case then an invalid result may be returned or certain
// logs might not be returned at all.
// No error is returned though because of an inconsistency between the chain and
// the log index. It is the caller's responsibility to verify this consistency
// using SyncLogIndex and re-process certain blocks if necessary.
// GetLogByLvIndex implements MatcherBackend.
func (fm *FilterMapsMatcherBackend) GetLogByLvIndex(ctx context.Context, lvIndex uint64) (*types.Log, error) {
fm.f.lock.RLock()
defer fm.f.lock.RUnlock()
return fm.f.getLogByLvIndex(lvIndex)
}
// synced signals to the matcher that has triggered a synchronisation that it
// has been finished and the log index is consistent with the chain head passed
// as a parameter.
// Note that if the log index head was far behind the chain head then it might not
// be synced up to the given head in a single step. Still, the latest chain head
// should be passed as a parameter and the existing log index should be consistent
// with that chain.
func (fm *FilterMapsMatcherBackend) synced(head *types.Header) {
fm.f.lock.Lock()
defer fm.f.lock.Unlock()
fm.syncCh <- SyncRange{
Head: head,
Valid: fm.valid,
FirstValid: fm.firstValid,
LastValid: fm.lastValid,
Indexed: fm.f.initialized,
FirstIndexed: fm.f.tailBlockNumber,
LastIndexed: fm.f.headBlockNumber,
}
fm.valid = fm.f.initialized
fm.firstValid = fm.f.tailBlockNumber
fm.lastValid = fm.f.headBlockNumber
fm.syncCh = nil
}
// SyncLogIndex ensures that the log index is consistent with the current state
// of the chain (note that it may or may not be actually synced up to the head).
// It blocks until this state is achieved.
// If successful, it returns a SyncRange that contains the latest chain head,
// the indexed range that is currently consistent with the chain and the valid
// range that has not been changed and has been consistent with all states of the
// chain since the previous SyncLogIndex or the creation of the matcher backend.
func (fm *FilterMapsMatcherBackend) SyncLogIndex(ctx context.Context) (SyncRange, error) {
// add SyncRange return channel, ensuring that
syncCh := make(chan SyncRange, 1)
fm.f.lock.Lock()
fm.syncCh = syncCh
fm.f.lock.Unlock()
select {
case fm.f.matcherSyncCh <- fm:
case <-ctx.Done():
return SyncRange{}, ctx.Err()
}
select {
case vr := <-syncCh:
if vr.Head == nil {
return SyncRange{}, errors.New("canonical chain head not available")
}
return vr, nil
case <-ctx.Done():
return SyncRange{}, ctx.Err()
}
}

5
eth/api_backend.go
View File

@ -45,7 +45,6 @@ import (
// EthAPIBackend implements ethapi.Backend and tracers.Backend for full nodes
type EthAPIBackend struct {
*filtermaps.FilterMapsMatcherBackend
extRPCEnabled bool
allowUnprotectedTxs bool
eth *Ethereum
@ -413,6 +412,10 @@ func (b *EthAPIBackend) ServiceFilter(ctx context.Context, session *bloombits.Ma
}
}
func (b *EthAPIBackend) NewMatcherBackend() filtermaps.MatcherBackend {
return b.eth.filterMaps.NewMatcherBackend()
}
func (b *EthAPIBackend) Engine() consensus.Engine {
return b.eth.engine
}

1
eth/backend.go
View File

@ -261,7 +261,6 @@ func New(stack *node.Node, config *ethconfig.Config) (*Ethereum, error) {
eth.miner.SetExtra(makeExtraData(config.Miner.ExtraData))
eth.APIBackend = &EthAPIBackend{
FilterMapsMatcherBackend: (*filtermaps.FilterMapsMatcherBackend)(eth.filterMaps),
extRPCEnabled: stack.Config().ExtRPCEnabled(),
allowUnprotectedTxs: stack.Config().AllowUnprotectedTxs,
eth: eth,

41
eth/filters/filter.go
View File

@ -19,10 +19,8 @@ package filters
import (
"context"
"errors"
"fmt"
"math"
"math/big"
//"reflect"
"slices"
"time"
@ -30,6 +28,7 @@ import (
"github.com/ethereum/go-ethereum/core/bloombits"
"github.com/ethereum/go-ethereum/core/filtermaps"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/rpc"
)
@ -120,29 +119,26 @@ func (f *Filter) Logs(ctx context.Context) ([]*types.Log, error) {
}
resolveSpecial := func(number int64) (int64, error) {
var hdr *types.Header
switch number {
case rpc.LatestBlockNumber.Int64(), rpc.PendingBlockNumber.Int64():
// we should return head here since we've already captured
// that we need to get the pending logs in the pending boolean above
hdr, _ = f.sys.backend.HeaderByNumber(ctx, rpc.LatestBlockNumber)
if hdr == nil {
return 0, errors.New("latest header not found")
}
return math.MaxInt64, nil
case rpc.FinalizedBlockNumber.Int64():
hdr, _ = f.sys.backend.HeaderByNumber(ctx, rpc.FinalizedBlockNumber)
hdr, _ := f.sys.backend.HeaderByNumber(ctx, rpc.FinalizedBlockNumber)
if hdr == nil {
return 0, errors.New("finalized header not found")
}
return hdr.Number.Int64(), nil
case rpc.SafeBlockNumber.Int64():
hdr, _ = f.sys.backend.HeaderByNumber(ctx, rpc.SafeBlockNumber)
hdr, _ := f.sys.backend.HeaderByNumber(ctx, rpc.SafeBlockNumber)
if hdr == nil {
return 0, errors.New("safe header not found")
}
return hdr.Number.Int64(), nil
default:
return number, nil
}
return hdr.Number.Int64(), nil
}
var err error
@ -155,26 +151,11 @@ func (f *Filter) Logs(ctx context.Context) ([]*types.Log, error) {
}
start := time.Now()
logs, err := filtermaps.GetPotentialMatches(ctx, f.sys.backend, uint64(f.begin), uint64(f.end), f.addresses, f.topics)
mb := f.sys.backend.NewMatcherBackend()
logs, _, _, _, err := filtermaps.GetPotentialMatches(ctx, mb, uint64(f.begin), uint64(f.end), f.addresses, f.topics)
mb.Close()
fmLogs := filterLogs(logs, nil, nil, f.addresses, f.topics)
fmt.Println("filtermaps (new) runtime", time.Since(start), "true matches", len(fmLogs), "false positives", len(logs)-len(fmLogs))
//TODO remove
/*f.bbMatchCount = 0
start = time.Now()
logChan, errChan := f.rangeLogsAsync(ctx)
var bbLogs []*types.Log
loop:
for {
select {
case log := <-logChan:
bbLogs = append(bbLogs, log)
case <-errChan:
break loop
}
}
fmt.Println("bloombits (old) runtime", time.Since(start), "true matches", len(bbLogs), "false positives", f.bbMatchCount-uint64(len(bbLogs)))
fmt.Println("DeepEqual", reflect.DeepEqual(fmLogs, bbLogs))*/
log.Debug("Finished log search", "run time", time.Since(start), "true matches", len(fmLogs), "false positives", len(logs)-len(fmLogs))
return fmLogs, err
}

4
eth/filters/filter_system.go
View File

@ -73,9 +73,7 @@ type Backend interface {
BloomStatus() (uint64, uint64)
ServiceFilter(ctx context.Context, session *bloombits.MatcherSession)
GetBlockLvPointer(ctx context.Context, blockNumber uint64) (uint64, error)
GetFilterMapRow(ctx context.Context, mapIndex, rowIndex uint32) (filtermaps.FilterRow, error)
GetLogByLvIndex(ctx context.Context, lvIndex uint64) (*types.Log, error)
NewMatcherBackend() filtermaps.MatcherBackend
}
// FilterSystem holds resources shared by all filters.

4
internal/ethapi/backend.go
View File

@ -97,9 +97,7 @@ type Backend interface {
BloomStatus() (uint64, uint64)
ServiceFilter(ctx context.Context, session *bloombits.MatcherSession)
GetBlockLvPointer(ctx context.Context, blockNumber uint64) (uint64, error)
GetFilterMapRow(ctx context.Context, mapIndex, rowIndex uint32) (filtermaps.FilterRow, error)
GetLogByLvIndex(ctx context.Context, lvIndex uint64) (*types.Log, error)
NewMatcherBackend() filtermaps.MatcherBackend
}
func GetAPIs(apiBackend Backend) []rpc.API {