dumpblocks

var DumpblocksCmd = &cobra.Command{
	Use:   "dumpblocks start end",
	Short: "Export a range of blocks from a JSON-RPC endpoint.",
	Long:  usage,
	Args:  cobra.MinimumNArgs(2),
	PreRunE: func(cmd *cobra.Command, args []string) (err error) {
		inputDumpblocks.RPCURL, err = flag.GetRPCURL(cmd)
		if err != nil {
			return err
		}
		return checkFlags(args)
	},
	RunE: func(cmd *cobra.Command, args []string) error {
		ctx := cmd.Context()
		ec, err := ethrpc.DialContext(ctx, inputDumpblocks.RPCURL)
		if err != nil {
			return err
		}

		var wg sync.WaitGroup
		log.Info().Uint("thread", inputDumpblocks.Threads).Msg("Thread count")
		var pool = make(chan bool, inputDumpblocks.Threads)
		start := inputDumpblocks.Start
		end := inputDumpblocks.End

		for start <= end {
			rangeStart := start
			rangeEnd := min(rangeStart+inputDumpblocks.BatchSize-1, end)

			pool <- true
			wg.Add(1)
			log.Info().Uint64("start", rangeStart).Uint64("end", rangeEnd).Msg("Getting range")
			go func() {
				defer wg.Done()
				for {
					failCount := 0
					blocks, err := util.GetBlockRange(ctx, rangeStart, rangeEnd, ec, inputDumpblocks.OnlyTxHashes)
					if err != nil {
						failCount = failCount + 1
						if failCount > 5 {
							log.Error().Uint64("rangeStart", rangeStart).Uint64("rangeEnd", rangeEnd).Msg("Unable to fetch blocks")
							break
						}
						time.Sleep(5 * time.Second)
						continue
					}

					blocks = filterBlocks(blocks)

					if inputDumpblocks.ShouldDumpBlocks {
						err = writeResponses(blocks, "block")
						if err != nil {
							log.Error().Err(err).Msg("Error writing blocks")
						}
					}

					if inputDumpblocks.ShouldDumpReceipts {
						failCount = 0
						receipts, err := util.GetReceipts(ctx, blocks, ec, inputDumpblocks.BatchSize)
						if err != nil {
							failCount = failCount + 1
							if failCount > 5 {
								log.Error().Uint64("rangeStart", rangeStart).Uint64("rangeEnd", rangeEnd).Msg("Unable to fetch receipts")
								break
							}
							time.Sleep(5 * time.Second)
							continue
						}

						err = writeResponses(receipts, "transaction")
						if err != nil {
							log.Error().Err(err).Msg("Error writing receipts")
						}
					}

					break
				}
				<-pool
			}()
			start = rangeEnd + 1
		}

		log.Info().Msg("Finished requesting data starting to wait")
		wg.Wait()
		log.Info().Msg("Done")

		return nil
	},
}