|
| 1 | +package orchestrator |
| 2 | + |
| 3 | +import ( |
| 4 | + "fmt" |
| 5 | + "math/big" |
| 6 | + "time" |
| 7 | + |
| 8 | + "github.com/rs/zerolog/log" |
| 9 | + config "github.com/thirdweb-dev/indexer/configs" |
| 10 | + "github.com/thirdweb-dev/indexer/internal/common" |
| 11 | + "github.com/thirdweb-dev/indexer/internal/metrics" |
| 12 | + "github.com/thirdweb-dev/indexer/internal/rpc" |
| 13 | + "github.com/thirdweb-dev/indexer/internal/storage" |
| 14 | + "github.com/thirdweb-dev/indexer/internal/worker" |
| 15 | +) |
| 16 | + |
| 17 | +type ReorgHandler struct { |
| 18 | + rpc rpc.Client |
| 19 | + storage storage.IStorage |
| 20 | + triggerInterval int |
| 21 | + blocksPerScan int |
| 22 | + lastCheckedBlock *big.Int |
| 23 | + worker *worker.Worker |
| 24 | +} |
| 25 | + |
| 26 | +const DEFAULT_REORG_HANDLER_INTERVAL = 1000 |
| 27 | +const DEFAULT_REORG_HANDLER_BLOCKS_PER_SCAN = 100 |
| 28 | + |
| 29 | +func NewReorgHandler(rpc rpc.Client, storage storage.IStorage) *ReorgHandler { |
| 30 | + triggerInterval := config.Cfg.ReorgHandler.Interval |
| 31 | + if triggerInterval == 0 { |
| 32 | + triggerInterval = DEFAULT_REORG_HANDLER_INTERVAL |
| 33 | + } |
| 34 | + blocksPerScan := config.Cfg.ReorgHandler.BlocksPerScan |
| 35 | + if blocksPerScan == 0 { |
| 36 | + blocksPerScan = DEFAULT_REORG_HANDLER_BLOCKS_PER_SCAN |
| 37 | + } |
| 38 | + return &ReorgHandler{ |
| 39 | + rpc: rpc, |
| 40 | + storage: storage, |
| 41 | + worker: worker.NewWorker(rpc), |
| 42 | + triggerInterval: triggerInterval, |
| 43 | + blocksPerScan: blocksPerScan, |
| 44 | + lastCheckedBlock: getInitialCheckedBlockNumber(storage, rpc.ChainID), |
| 45 | + } |
| 46 | +} |
| 47 | + |
| 48 | +func getInitialCheckedBlockNumber(storage storage.IStorage, chainId *big.Int) *big.Int { |
| 49 | + bn := big.NewInt(int64(config.Cfg.ReorgHandler.FromBlock)) |
| 50 | + if !config.Cfg.ReorgHandler.ForceFromBlock { |
| 51 | + storedFromBlock, err := storage.OrchestratorStorage.GetLastReorgCheckedBlockNumber(chainId) |
| 52 | + if err != nil { |
| 53 | + log.Debug().Err(err).Msgf("Error getting last reorg checked block number, using configured: %s", bn) |
| 54 | + return bn |
| 55 | + } |
| 56 | + if storedFromBlock.Sign() <= 0 { |
| 57 | + log.Debug().Msgf("Last reorg checked block number not found, using configured: %s", bn) |
| 58 | + return bn |
| 59 | + } |
| 60 | + log.Debug().Msgf("Last reorg checked block number found, using: %s", storedFromBlock) |
| 61 | + return storedFromBlock |
| 62 | + } |
| 63 | + log.Debug().Msgf("Force from block reorg check flag set, using configured: %s", bn) |
| 64 | + return bn |
| 65 | +} |
| 66 | + |
| 67 | +func (rh *ReorgHandler) Start() { |
| 68 | + interval := time.Duration(rh.triggerInterval) * time.Millisecond |
| 69 | + ticker := time.NewTicker(interval) |
| 70 | + |
| 71 | + log.Debug().Msgf("Reorg handler running") |
| 72 | + go func() { |
| 73 | + for range ticker.C { |
| 74 | + lookbackFrom := new(big.Int).Add(rh.lastCheckedBlock, big.NewInt(int64(rh.blocksPerScan))) |
| 75 | + blockHeaders, err := rh.storage.MainStorage.LookbackBlockHeaders(rh.rpc.ChainID, rh.blocksPerScan, lookbackFrom) |
| 76 | + if err != nil { |
| 77 | + log.Error().Err(err).Msg("Error getting recent block headers") |
| 78 | + continue |
| 79 | + } |
| 80 | + if len(blockHeaders) == 0 { |
| 81 | + log.Warn().Msg("No block headers found") |
| 82 | + continue |
| 83 | + } |
| 84 | + mostRecentBlockHeader := blockHeaders[0] |
| 85 | + reorgEndIndex := findReorgEndIndex(blockHeaders) |
| 86 | + if reorgEndIndex == -1 { |
| 87 | + rh.lastCheckedBlock = mostRecentBlockHeader.Number |
| 88 | + rh.storage.OrchestratorStorage.SetLastReorgCheckedBlockNumber(rh.rpc.ChainID, mostRecentBlockHeader.Number) |
| 89 | + metrics.ReorgHandlerLastCheckedBlock.Set(float64(mostRecentBlockHeader.Number.Int64())) |
| 90 | + continue |
| 91 | + } |
| 92 | + metrics.ReorgCounter.Inc() |
| 93 | + forkPoint, err := rh.findForkPoint(blockHeaders[reorgEndIndex:]) |
| 94 | + if err != nil { |
| 95 | + log.Error().Err(err).Msg("Error while finding fork point") |
| 96 | + continue |
| 97 | + } |
| 98 | + err = rh.handleReorg(forkPoint, lookbackFrom) |
| 99 | + if err != nil { |
| 100 | + log.Error().Err(err).Msg("Error while handling reorg") |
| 101 | + continue |
| 102 | + } |
| 103 | + rh.lastCheckedBlock = mostRecentBlockHeader.Number |
| 104 | + rh.storage.OrchestratorStorage.SetLastReorgCheckedBlockNumber(rh.rpc.ChainID, mostRecentBlockHeader.Number) |
| 105 | + metrics.ReorgHandlerLastCheckedBlock.Set(float64(mostRecentBlockHeader.Number.Int64())) |
| 106 | + } |
| 107 | + }() |
| 108 | + |
| 109 | + // Keep the program running (otherwise it will exit) |
| 110 | + select {} |
| 111 | +} |
| 112 | + |
| 113 | +func findReorgEndIndex(reversedBlockHeaders []common.BlockHeader) (index int) { |
| 114 | + for i := 0; i < len(reversedBlockHeaders)-1; i++ { |
| 115 | + currentBlock := reversedBlockHeaders[i] |
| 116 | + previousBlock := reversedBlockHeaders[i+1] |
| 117 | + |
| 118 | + if currentBlock.ParentHash != previousBlock.Hash { |
| 119 | + log.Debug(). |
| 120 | + Str("currentBlockNumber", currentBlock.Number.String()). |
| 121 | + Str("currentBlockHash", currentBlock.Hash). |
| 122 | + Str("currentBlockParentHash", currentBlock.ParentHash). |
| 123 | + Str("previousBlockNumber", previousBlock.Number.String()). |
| 124 | + Str("previousBlockHash", previousBlock.Hash). |
| 125 | + Msg("Reorg detected: parent hash mismatch") |
| 126 | + return i |
| 127 | + } |
| 128 | + } |
| 129 | + return -1 |
| 130 | +} |
| 131 | + |
| 132 | +func (rh *ReorgHandler) findForkPoint(reversedBlockHeaders []common.BlockHeader) (forkPoint *big.Int, err error) { |
| 133 | + newBlocksByNumber, err := rh.getNewBlocksByNumber(reversedBlockHeaders) |
| 134 | + if err != nil { |
| 135 | + return nil, err |
| 136 | + } |
| 137 | + |
| 138 | + for i := 0; i < len(reversedBlockHeaders)-1; i++ { |
| 139 | + blockHeader := reversedBlockHeaders[i] |
| 140 | + block, ok := (*newBlocksByNumber)[blockHeader.Number.String()] |
| 141 | + if !ok { |
| 142 | + return nil, fmt.Errorf("block not found: %s", blockHeader.Number.String()) |
| 143 | + } |
| 144 | + if block.Hash == blockHeader.Hash { |
| 145 | + previousBlock := reversedBlockHeaders[i+1] |
| 146 | + return previousBlock.Number, nil |
| 147 | + } |
| 148 | + } |
| 149 | + lookbackFrom := reversedBlockHeaders[len(reversedBlockHeaders)-1].Number |
| 150 | + nextHeadersBatch, err := rh.storage.MainStorage.LookbackBlockHeaders(rh.rpc.ChainID, rh.blocksPerScan, lookbackFrom) |
| 151 | + if err != nil { |
| 152 | + return nil, fmt.Errorf("error getting next headers batch: %w", err) |
| 153 | + } |
| 154 | + return rh.findForkPoint(nextHeadersBatch) |
| 155 | +} |
| 156 | + |
| 157 | +func (rh *ReorgHandler) getNewBlocksByNumber(reversedBlockHeaders []common.BlockHeader) (*map[string]common.Block, error) { |
| 158 | + blockNumbers := make([]*big.Int, 0, len(reversedBlockHeaders)) |
| 159 | + for _, header := range reversedBlockHeaders { |
| 160 | + blockNumbers = append(blockNumbers, header.Number) |
| 161 | + } |
| 162 | + blockResults := rh.rpc.GetBlocks(blockNumbers) |
| 163 | + fetchedBlocksByNumber := make(map[string]common.Block) |
| 164 | + for _, blockResult := range blockResults { |
| 165 | + if blockResult.Error != nil { |
| 166 | + return nil, fmt.Errorf("error fetching block %s: %w", blockResult.BlockNumber.String(), blockResult.Error) |
| 167 | + } |
| 168 | + fetchedBlocksByNumber[blockResult.BlockNumber.String()] = blockResult.Data |
| 169 | + } |
| 170 | + return &fetchedBlocksByNumber, nil |
| 171 | +} |
| 172 | + |
| 173 | +func (rh *ReorgHandler) handleReorg(reorgStart *big.Int, reorgEnd *big.Int) error { |
| 174 | + blockRange := make([]*big.Int, 0, new(big.Int).Sub(reorgEnd, reorgStart).Int64()) |
| 175 | + for i := new(big.Int).Set(reorgStart); i.Cmp(reorgEnd) <= 0; i.Add(i, big.NewInt(1)) { |
| 176 | + blockRange = append(blockRange, new(big.Int).Set(i)) |
| 177 | + } |
| 178 | + |
| 179 | + results := rh.worker.Run(blockRange) |
| 180 | + data := make([]common.BlockData, 0, len(results)) |
| 181 | + for _, result := range results { |
| 182 | + if result.Error != nil { |
| 183 | + return fmt.Errorf("cannot fix reorg: failed block %s: %w", result.BlockNumber.String(), result.Error) |
| 184 | + } |
| 185 | + data = append(data, common.BlockData{ |
| 186 | + Block: result.Data.Block, |
| 187 | + Logs: result.Data.Logs, |
| 188 | + Transactions: result.Data.Transactions, |
| 189 | + Traces: result.Data.Traces, |
| 190 | + }) |
| 191 | + } |
| 192 | + // TODO make delete and insert atomic |
| 193 | + if err := rh.storage.MainStorage.DeleteBlockData(rh.rpc.ChainID, blockRange); err != nil { |
| 194 | + return fmt.Errorf("error deleting data for blocks %v: %w", blockRange, err) |
| 195 | + } |
| 196 | + if err := rh.storage.MainStorage.InsertBlockData(&data); err != nil { |
| 197 | + return fmt.Errorf("error saving data to main storage: %w", err) |
| 198 | + } |
| 199 | + return nil |
| 200 | +} |
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