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Add reorg handler functionality and configuration options #91
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,200 @@ | ||
| package orchestrator | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "math/big" | ||
| "time" | ||
|
|
||
| "github.com/rs/zerolog/log" | ||
| config "github.com/thirdweb-dev/indexer/configs" | ||
| "github.com/thirdweb-dev/indexer/internal/common" | ||
| "github.com/thirdweb-dev/indexer/internal/metrics" | ||
| "github.com/thirdweb-dev/indexer/internal/rpc" | ||
| "github.com/thirdweb-dev/indexer/internal/storage" | ||
| "github.com/thirdweb-dev/indexer/internal/worker" | ||
| ) | ||
|
|
||
| type ReorgHandler struct { | ||
| rpc rpc.Client | ||
| storage storage.IStorage | ||
| triggerInterval int | ||
| blocksPerScan int | ||
| lastCheckedBlock *big.Int | ||
| worker *worker.Worker | ||
| } | ||
|
|
||
| const DEFAULT_REORG_HANDLER_INTERVAL = 1000 | ||
| const DEFAULT_REORG_HANDLER_BLOCKS_PER_SCAN = 100 | ||
|
|
||
| func NewReorgHandler(rpc rpc.Client, storage storage.IStorage) *ReorgHandler { | ||
| triggerInterval := config.Cfg.ReorgHandler.Interval | ||
| if triggerInterval == 0 { | ||
| triggerInterval = DEFAULT_REORG_HANDLER_INTERVAL | ||
| } | ||
| blocksPerScan := config.Cfg.ReorgHandler.BlocksPerScan | ||
| if blocksPerScan == 0 { | ||
| blocksPerScan = DEFAULT_REORG_HANDLER_BLOCKS_PER_SCAN | ||
| } | ||
| return &ReorgHandler{ | ||
| rpc: rpc, | ||
| storage: storage, | ||
| worker: worker.NewWorker(rpc), | ||
| triggerInterval: triggerInterval, | ||
| blocksPerScan: blocksPerScan, | ||
| lastCheckedBlock: getInitialCheckedBlockNumber(storage, rpc.ChainID), | ||
| } | ||
| } | ||
|
|
||
| func getInitialCheckedBlockNumber(storage storage.IStorage, chainId *big.Int) *big.Int { | ||
| bn := big.NewInt(int64(config.Cfg.ReorgHandler.FromBlock)) | ||
| if !config.Cfg.ReorgHandler.ForceFromBlock { | ||
| storedFromBlock, err := storage.OrchestratorStorage.GetLastReorgCheckedBlockNumber(chainId) | ||
| if err != nil { | ||
| log.Debug().Err(err).Msgf("Error getting last reorg checked block number, using configured: %s", bn) | ||
| return bn | ||
| } | ||
| if storedFromBlock.Sign() <= 0 { | ||
| log.Debug().Msgf("Last reorg checked block number not found, using configured: %s", bn) | ||
| return bn | ||
| } | ||
| log.Debug().Msgf("Last reorg checked block number found, using: %s", storedFromBlock) | ||
| return storedFromBlock | ||
| } | ||
| log.Debug().Msgf("Force from block reorg check flag set, using configured: %s", bn) | ||
| return bn | ||
| } | ||
|
|
||
| func (rh *ReorgHandler) Start() { | ||
| interval := time.Duration(rh.triggerInterval) * time.Millisecond | ||
| ticker := time.NewTicker(interval) | ||
|
|
||
| log.Debug().Msgf("Reorg handler running") | ||
| go func() { | ||
| for range ticker.C { | ||
| lookbackFrom := new(big.Int).Add(rh.lastCheckedBlock, big.NewInt(int64(rh.blocksPerScan))) | ||
| blockHeaders, err := rh.storage.MainStorage.LookbackBlockHeaders(rh.rpc.ChainID, rh.blocksPerScan, lookbackFrom) | ||
| if err != nil { | ||
| log.Error().Err(err).Msg("Error getting recent block headers") | ||
| continue | ||
| } | ||
| if len(blockHeaders) == 0 { | ||
| log.Warn().Msg("No block headers found") | ||
| continue | ||
| } | ||
| mostRecentBlockHeader := blockHeaders[0] | ||
| reorgEndIndex := findReorgEndIndex(blockHeaders) | ||
| if reorgEndIndex == -1 { | ||
| rh.lastCheckedBlock = mostRecentBlockHeader.Number | ||
| rh.storage.OrchestratorStorage.SetLastReorgCheckedBlockNumber(rh.rpc.ChainID, mostRecentBlockHeader.Number) | ||
| metrics.ReorgHandlerLastCheckedBlock.Set(float64(mostRecentBlockHeader.Number.Int64())) | ||
| continue | ||
| } | ||
| metrics.ReorgCounter.Inc() | ||
| forkPoint, err := rh.findForkPoint(blockHeaders[reorgEndIndex:]) | ||
| if err != nil { | ||
| log.Error().Err(err).Msg("Error while finding fork point") | ||
| continue | ||
| } | ||
| err = rh.handleReorg(forkPoint, lookbackFrom) | ||
| if err != nil { | ||
| log.Error().Err(err).Msg("Error while handling reorg") | ||
| continue | ||
| } | ||
| rh.lastCheckedBlock = mostRecentBlockHeader.Number | ||
| rh.storage.OrchestratorStorage.SetLastReorgCheckedBlockNumber(rh.rpc.ChainID, mostRecentBlockHeader.Number) | ||
| metrics.ReorgHandlerLastCheckedBlock.Set(float64(mostRecentBlockHeader.Number.Int64())) | ||
| } | ||
| }() | ||
|
|
||
| // Keep the program running (otherwise it will exit) | ||
| select {} | ||
| } | ||
|
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| func findReorgEndIndex(reversedBlockHeaders []common.BlockHeader) (index int) { | ||
| for i := 0; i < len(reversedBlockHeaders)-1; i++ { | ||
| currentBlock := reversedBlockHeaders[i] | ||
| previousBlock := reversedBlockHeaders[i+1] | ||
|
|
||
| if currentBlock.ParentHash != previousBlock.Hash { | ||
| log.Debug(). | ||
| Str("currentBlockNumber", currentBlock.Number.String()). | ||
| Str("currentBlockHash", currentBlock.Hash). | ||
| Str("currentBlockParentHash", currentBlock.ParentHash). | ||
| Str("previousBlockNumber", previousBlock.Number.String()). | ||
| Str("previousBlockHash", previousBlock.Hash). | ||
| Msg("Reorg detected: parent hash mismatch") | ||
| return i | ||
| } | ||
| } | ||
| return -1 | ||
| } | ||
|
|
||
| func (rh *ReorgHandler) findForkPoint(reversedBlockHeaders []common.BlockHeader) (forkPoint *big.Int, err error) { | ||
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|
||
| newBlocksByNumber, err := rh.getNewBlocksByNumber(reversedBlockHeaders) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| for i := 0; i < len(reversedBlockHeaders)-1; i++ { | ||
| blockHeader := reversedBlockHeaders[i] | ||
| block, ok := (*newBlocksByNumber)[blockHeader.Number.String()] | ||
| if !ok { | ||
| return nil, fmt.Errorf("block not found: %s", blockHeader.Number.String()) | ||
| } | ||
| if block.Hash == blockHeader.Hash { | ||
| previousBlock := reversedBlockHeaders[i+1] | ||
| return previousBlock.Number, nil | ||
| } | ||
| } | ||
| lookbackFrom := reversedBlockHeaders[len(reversedBlockHeaders)-1].Number | ||
| nextHeadersBatch, err := rh.storage.MainStorage.LookbackBlockHeaders(rh.rpc.ChainID, rh.blocksPerScan, lookbackFrom) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error getting next headers batch: %w", err) | ||
| } | ||
| return rh.findForkPoint(nextHeadersBatch) | ||
| } | ||
|
|
||
| func (rh *ReorgHandler) getNewBlocksByNumber(reversedBlockHeaders []common.BlockHeader) (*map[string]common.Block, error) { | ||
| blockNumbers := make([]*big.Int, 0, len(reversedBlockHeaders)) | ||
| for _, header := range reversedBlockHeaders { | ||
| blockNumbers = append(blockNumbers, header.Number) | ||
| } | ||
| blockResults := rh.rpc.GetBlocks(blockNumbers) | ||
| fetchedBlocksByNumber := make(map[string]common.Block) | ||
| for _, blockResult := range blockResults { | ||
| if blockResult.Error != nil { | ||
| return nil, fmt.Errorf("error fetching block %s: %w", blockResult.BlockNumber.String(), blockResult.Error) | ||
| } | ||
| fetchedBlocksByNumber[blockResult.BlockNumber.String()] = blockResult.Data | ||
| } | ||
| return &fetchedBlocksByNumber, nil | ||
| } | ||
|
|
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| func (rh *ReorgHandler) handleReorg(reorgStart *big.Int, reorgEnd *big.Int) error { | ||
| blockRange := make([]*big.Int, 0, new(big.Int).Sub(reorgEnd, reorgStart).Int64()) | ||
| for i := new(big.Int).Set(reorgStart); i.Cmp(reorgEnd) <= 0; i.Add(i, big.NewInt(1)) { | ||
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|
||
| blockRange = append(blockRange, new(big.Int).Set(i)) | ||
| } | ||
|
|
||
| results := rh.worker.Run(blockRange) | ||
| data := make([]common.BlockData, 0, len(results)) | ||
| for _, result := range results { | ||
| if result.Error != nil { | ||
| return fmt.Errorf("cannot fix reorg: failed block %s: %w", result.BlockNumber.String(), result.Error) | ||
| } | ||
| data = append(data, common.BlockData{ | ||
| Block: result.Data.Block, | ||
| Logs: result.Data.Logs, | ||
| Transactions: result.Data.Transactions, | ||
| Traces: result.Data.Traces, | ||
| }) | ||
| } | ||
| // TODO make delete and insert atomic | ||
| if err := rh.storage.MainStorage.DeleteBlockData(rh.rpc.ChainID, blockRange); err != nil { | ||
| return fmt.Errorf("error deleting data for blocks %v: %w", blockRange, err) | ||
| } | ||
| if err := rh.storage.MainStorage.InsertBlockData(&data); err != nil { | ||
| return fmt.Errorf("error saving data to main storage: %w", err) | ||
| } | ||
| return nil | ||
| } | ||
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