|
| 1 | +// Copyright 2025 The Swarm Authors. All rights reserved. |
| 2 | +// Use of this source code is governed by a BSD-style |
| 3 | +// license that can be found in the LICENSE file. |
| 4 | + |
| 5 | +package node |
| 6 | + |
| 7 | +import ( |
| 8 | + "bytes" |
| 9 | + "compress/gzip" |
| 10 | + "context" |
| 11 | + "encoding/json" |
| 12 | + "fmt" |
| 13 | + "io" |
| 14 | + "sort" |
| 15 | + "sync" |
| 16 | + |
| 17 | + "slices" |
| 18 | + |
| 19 | + "github.com/ethereum/go-ethereum" |
| 20 | + "github.com/ethereum/go-ethereum/core/types" |
| 21 | + archive "github.com/ethersphere/batch-archive" |
| 22 | + "github.com/ethersphere/bee/v2/pkg/log" |
| 23 | + "github.com/ethersphere/bee/v2/pkg/postage/listener" |
| 24 | +) |
| 25 | + |
| 26 | +var _ listener.BlockHeightContractFilterer = (*SnapshotLogFilterer)(nil) |
| 27 | + |
| 28 | +type SnapshotLogFilterer struct { |
| 29 | + logger log.Logger |
| 30 | + loadedLogs []types.Log |
| 31 | + maxBlockHeight uint64 |
| 32 | + initOnce sync.Once |
| 33 | +} |
| 34 | + |
| 35 | +func NewSnapshotLogFilterer(logger log.Logger) *SnapshotLogFilterer { |
| 36 | + return &SnapshotLogFilterer{ |
| 37 | + logger: logger, |
| 38 | + } |
| 39 | +} |
| 40 | + |
| 41 | +// loadSnapshot is responsible for loading and processing the snapshot data. |
| 42 | +// It is intended to be called exactly once by initOnce.Do. |
| 43 | +func (f *SnapshotLogFilterer) loadSnapshot() error { |
| 44 | + f.logger.Info("loading batch snapshot") |
| 45 | + data := archive.GetBatchSnapshot() |
| 46 | + dataReader := bytes.NewReader(data) |
| 47 | + gzipReader, err := gzip.NewReader(dataReader) |
| 48 | + if err != nil { |
| 49 | + f.logger.Error(err, "failed to create gzip reader for batch import") |
| 50 | + return fmt.Errorf("create gzip reader: %w", err) |
| 51 | + } |
| 52 | + defer gzipReader.Close() |
| 53 | + |
| 54 | + if err := f.parseLogs(gzipReader); err != nil { |
| 55 | + f.logger.Error(err, "failed to parse logs from snapshot") |
| 56 | + return err |
| 57 | + } |
| 58 | + |
| 59 | + f.logger.Info("batch snapshot loaded successfully", "log_count", len(f.loadedLogs), "max_block_height", f.maxBlockHeight) |
| 60 | + return nil |
| 61 | +} |
| 62 | + |
| 63 | +func (f *SnapshotLogFilterer) parseLogs(reader io.Reader) error { |
| 64 | + var parsedLogs []types.Log |
| 65 | + var currentMaxBlockHeight uint64 |
| 66 | + |
| 67 | + decoder := json.NewDecoder(reader) |
| 68 | + for { |
| 69 | + var logEntry types.Log |
| 70 | + if err := decoder.Decode(&logEntry); err != nil { |
| 71 | + if err == io.EOF { |
| 72 | + break |
| 73 | + } |
| 74 | + f.logger.Warning("failed to decode log event, skipping", "error", err) |
| 75 | + continue |
| 76 | + } |
| 77 | + |
| 78 | + if logEntry.BlockNumber > currentMaxBlockHeight { |
| 79 | + currentMaxBlockHeight = logEntry.BlockNumber |
| 80 | + } |
| 81 | + parsedLogs = append(parsedLogs, logEntry) |
| 82 | + } |
| 83 | + |
| 84 | + f.loadedLogs = parsedLogs |
| 85 | + f.maxBlockHeight = currentMaxBlockHeight |
| 86 | + return nil |
| 87 | +} |
| 88 | + |
| 89 | +// ensureLoaded calls loadSnapshot via sync.Once to ensure thread-safe, one-time initialization. |
| 90 | +func (f *SnapshotLogFilterer) ensureLoaded() error { |
| 91 | + var err error |
| 92 | + f.initOnce.Do(func() { |
| 93 | + err = f.loadSnapshot() |
| 94 | + }) |
| 95 | + return err |
| 96 | +} |
| 97 | + |
| 98 | +func (f *SnapshotLogFilterer) FilterLogs(ctx context.Context, query ethereum.FilterQuery) ([]types.Log, error) { |
| 99 | + if err := f.ensureLoaded(); err != nil { |
| 100 | + return nil, fmt.Errorf("failed to ensure snapshot was loaded for FilterLogs: %w", err) |
| 101 | + } |
| 102 | + |
| 103 | + f.logger.Debug("filtering pre-loaded logs", "total_logs", len(f.loadedLogs), "query_from_block", query.FromBlock, "query_to_block", query.ToBlock, "query_addresses_count", len(query.Addresses), "query_topics_count", len(query.Topics)) |
| 104 | + |
| 105 | + filtered := make([]types.Log, 0) |
| 106 | + |
| 107 | + startIndex := 0 |
| 108 | + if query.FromBlock != nil { |
| 109 | + fromBlockNum := query.FromBlock.Uint64() |
| 110 | + startIndex = sort.Search(len(f.loadedLogs), func(i int) bool { |
| 111 | + return f.loadedLogs[i].BlockNumber >= fromBlockNum |
| 112 | + }) |
| 113 | + } |
| 114 | + |
| 115 | + scannedCount := 0 |
| 116 | + for i := startIndex; i < len(f.loadedLogs); i++ { |
| 117 | + logEntry := f.loadedLogs[i] |
| 118 | + scannedCount++ |
| 119 | + |
| 120 | + if query.ToBlock != nil && logEntry.BlockNumber > query.ToBlock.Uint64() { |
| 121 | + break |
| 122 | + } |
| 123 | + |
| 124 | + if len(query.Addresses) > 0 && !slices.Contains(query.Addresses, logEntry.Address) { |
| 125 | + continue |
| 126 | + } |
| 127 | + |
| 128 | + if len(query.Topics) > 0 { |
| 129 | + match := true |
| 130 | + for topicIndex, topicCriteria := range query.Topics { |
| 131 | + if len(topicCriteria) == 0 { |
| 132 | + continue |
| 133 | + } |
| 134 | + if topicIndex >= len(logEntry.Topics) { |
| 135 | + match = false |
| 136 | + break |
| 137 | + } |
| 138 | + |
| 139 | + if !slices.Contains(topicCriteria, logEntry.Topics[topicIndex]) { |
| 140 | + match = false |
| 141 | + break |
| 142 | + } |
| 143 | + } |
| 144 | + if !match { |
| 145 | + continue |
| 146 | + } |
| 147 | + } |
| 148 | + |
| 149 | + filtered = append(filtered, logEntry) |
| 150 | + } |
| 151 | + |
| 152 | + f.logger.Debug("filtered logs complete", "input_log_count", len(f.loadedLogs), "potential_logs_in_block_range", scannedCount, "output_count", len(filtered)) |
| 153 | + return filtered, nil |
| 154 | +} |
| 155 | + |
| 156 | +func (f *SnapshotLogFilterer) BlockNumber(_ context.Context) (uint64, error) { |
| 157 | + if err := f.ensureLoaded(); err != nil { |
| 158 | + return 0, fmt.Errorf("failed to ensure snapshot was loaded for BlockNumber: %w", err) |
| 159 | + } |
| 160 | + return f.maxBlockHeight, nil |
| 161 | +} |
0 commit comments