Official Go implementation of the Ethereum protocol
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go-ethereum/cmd/utils/cmd.go

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// Copyright 2014 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
// Package utils contains internal helper functions for go-ethereum commands.
package utils
import (
"bufio"
"bytes"
"compress/gzip"
"crypto/sha256"
"errors"
"fmt"
"io"
"os"
"os/signal"
"path"
"runtime"
"strings"
"syscall"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/state/snapshot"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth/ethconfig"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/internal/debug"
"github.com/ethereum/go-ethereum/internal/era"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
"github.com/urfave/cli/v2"
)
const (
importBatchSize = 2500
)
// Fatalf formats a message to standard error and exits the program.
// The message is also printed to standard output if standard error
// is redirected to a different file.
func Fatalf(format string, args ...interface{}) {
w := io.MultiWriter(os.Stdout, os.Stderr)
if runtime.GOOS == "windows" {
// The SameFile check below doesn't work on Windows.
// stdout is unlikely to get redirected though, so just print there.
w = os.Stdout
} else {
outf, _ := os.Stdout.Stat()
errf, _ := os.Stderr.Stat()
if outf != nil && errf != nil && os.SameFile(outf, errf) {
w = os.Stderr
}
}
fmt.Fprintf(w, "Fatal: "+format+"\n", args...)
os.Exit(1)
}
func StartNode(ctx *cli.Context, stack *node.Node, isConsole bool) {
if err := stack.Start(); err != nil {
Fatalf("Error starting protocol stack: %v", err)
}
go func() {
sigc := make(chan os.Signal, 1)
signal.Notify(sigc, syscall.SIGINT, syscall.SIGTERM)
defer signal.Stop(sigc)
minFreeDiskSpace := 2 * ethconfig.Defaults.TrieDirtyCache // Default 2 * 256Mb
if ctx.IsSet(MinFreeDiskSpaceFlag.Name) {
minFreeDiskSpace = ctx.Int(MinFreeDiskSpaceFlag.Name)
} else if ctx.IsSet(CacheFlag.Name) || ctx.IsSet(CacheGCFlag.Name) {
minFreeDiskSpace = 2 * ctx.Int(CacheFlag.Name) * ctx.Int(CacheGCFlag.Name) / 100
}
if minFreeDiskSpace > 0 {
go monitorFreeDiskSpace(sigc, stack.InstanceDir(), uint64(minFreeDiskSpace)*1024*1024)
}
shutdown := func() {
log.Info("Got interrupt, shutting down...")
go stack.Close()
for i := 10; i > 0; i-- {
<-sigc
if i > 1 {
log.Warn("Already shutting down, interrupt more to panic.", "times", i-1)
}
}
debug.Exit() // ensure trace and CPU profile data is flushed.
debug.LoudPanic("boom")
}
if isConsole {
// In JS console mode, SIGINT is ignored because it's handled by the console.
// However, SIGTERM still shuts down the node.
for {
sig := <-sigc
if sig == syscall.SIGTERM {
shutdown()
return
}
}
} else {
<-sigc
shutdown()
}
}()
}
func monitorFreeDiskSpace(sigc chan os.Signal, path string, freeDiskSpaceCritical uint64) {
if path == "" {
return
}
for {
freeSpace, err := getFreeDiskSpace(path)
if err != nil {
log.Warn("Failed to get free disk space", "path", path, "err", err)
break
}
if freeSpace < freeDiskSpaceCritical {
log.Error("Low disk space. Gracefully shutting down Geth to prevent database corruption.", "available", common.StorageSize(freeSpace), "path", path)
sigc <- syscall.SIGTERM
break
} else if freeSpace < 2*freeDiskSpaceCritical {
log.Warn("Disk space is running low. Geth will shutdown if disk space runs below critical level.", "available", common.StorageSize(freeSpace), "critical_level", common.StorageSize(freeDiskSpaceCritical), "path", path)
}
time.Sleep(30 * time.Second)
}
}
func ImportChain(chain *core.BlockChain, fn string) error {
// Watch for Ctrl-C while the import is running.
// If a signal is received, the import will stop at the next batch.
interrupt := make(chan os.Signal, 1)
stop := make(chan struct{})
signal.Notify(interrupt, syscall.SIGINT, syscall.SIGTERM)
defer signal.Stop(interrupt)
defer close(interrupt)
go func() {
if _, ok := <-interrupt; ok {
log.Info("Interrupted during import, stopping at next batch")
}
close(stop)
}()
checkInterrupt := func() bool {
select {
case <-stop:
return true
default:
return false
}
}
log.Info("Importing blockchain", "file", fn)
// Open the file handle and potentially unwrap the gzip stream
fh, err := os.Open(fn)
if err != nil {
return err
}
defer fh.Close()
var reader io.Reader = fh
if strings.HasSuffix(fn, ".gz") {
if reader, err = gzip.NewReader(reader); err != nil {
return err
}
}
stream := rlp.NewStream(reader, 0)
// Run actual the import.
blocks := make(types.Blocks, importBatchSize)
n := 0
for batch := 0; ; batch++ {
// Load a batch of RLP blocks.
if checkInterrupt() {
return errors.New("interrupted")
}
i := 0
for ; i < importBatchSize; i++ {
var b types.Block
if err := stream.Decode(&b); err == io.EOF {
break
} else if err != nil {
return fmt.Errorf("at block %d: %v", n, err)
}
// don't import first block
if b.NumberU64() == 0 {
i--
continue
}
blocks[i] = &b
n++
}
if i == 0 {
break
}
// Import the batch.
if checkInterrupt() {
return errors.New("interrupted")
}
missing := missingBlocks(chain, blocks[:i])
if len(missing) == 0 {
log.Info("Skipping batch as all blocks present", "batch", batch, "first", blocks[0].Hash(), "last", blocks[i-1].Hash())
continue
}
if failindex, err := chain.InsertChain(missing); err != nil {
var failnumber uint64
if failindex > 0 && failindex < len(missing) {
failnumber = missing[failindex].NumberU64()
} else {
failnumber = missing[0].NumberU64()
}
return fmt.Errorf("invalid block %d: %v", failnumber, err)
}
}
return nil
}
func readList(filename string) ([]string, error) {
b, err := os.ReadFile(filename)
if err != nil {
return nil, err
}
return strings.Split(string(b), "\n"), nil
}
// ImportHistory imports Era1 files containing historical block information,
// starting from genesis.
func ImportHistory(chain *core.BlockChain, db ethdb.Database, dir string, network string) error {
if chain.CurrentSnapBlock().Number.BitLen() != 0 {
return errors.New("history import only supported when starting from genesis")
}
entries, err := era.ReadDir(dir, network)
if err != nil {
return fmt.Errorf("error reading %s: %w", dir, err)
}
checksums, err := readList(path.Join(dir, "checksums.txt"))
if err != nil {
return fmt.Errorf("unable to read checksums.txt: %w", err)
}
if len(checksums) != len(entries) {
return fmt.Errorf("expected equal number of checksums and entries, have: %d checksums, %d entries", len(checksums), len(entries))
}
var (
start = time.Now()
reported = time.Now()
imported = 0
forker = core.NewForkChoice(chain, nil)
h = sha256.New()
buf = bytes.NewBuffer(nil)
)
for i, filename := range entries {
err := func() error {
f, err := os.Open(path.Join(dir, filename))
if err != nil {
return fmt.Errorf("unable to open era: %w", err)
}
defer f.Close()
// Validate checksum.
if _, err := io.Copy(h, f); err != nil {
return fmt.Errorf("unable to recalculate checksum: %w", err)
}
if have, want := common.BytesToHash(h.Sum(buf.Bytes()[:])).Hex(), checksums[i]; have != want {
return fmt.Errorf("checksum mismatch: have %s, want %s", have, want)
}
h.Reset()
buf.Reset()
// Import all block data from Era1.
e, err := era.From(f)
if err != nil {
return fmt.Errorf("error opening era: %w", err)
}
it, err := era.NewIterator(e)
if err != nil {
return fmt.Errorf("error making era reader: %w", err)
}
for it.Next() {
block, err := it.Block()
if err != nil {
return fmt.Errorf("error reading block %d: %w", it.Number(), err)
}
if block.Number().BitLen() == 0 {
continue // skip genesis
}
receipts, err := it.Receipts()
if err != nil {
return fmt.Errorf("error reading receipts %d: %w", it.Number(), err)
}
if status, err := chain.HeaderChain().InsertHeaderChain([]*types.Header{block.Header()}, start, forker); err != nil {
return fmt.Errorf("error inserting header %d: %w", it.Number(), err)
} else if status != core.CanonStatTy {
return fmt.Errorf("error inserting header %d, not canon: %v", it.Number(), status)
}
if _, err := chain.InsertReceiptChain([]*types.Block{block}, []types.Receipts{receipts}, 2^64-1); err != nil {
return fmt.Errorf("error inserting body %d: %w", it.Number(), err)
}
imported += 1
// Give the user some feedback that something is happening.
if time.Since(reported) >= 8*time.Second {
log.Info("Importing Era files", "head", it.Number(), "imported", imported, "elapsed", common.PrettyDuration(time.Since(start)))
imported = 0
reported = time.Now()
}
}
return nil
}()
if err != nil {
return err
}
}
return nil
}
func missingBlocks(chain *core.BlockChain, blocks []*types.Block) []*types.Block {
head := chain.CurrentBlock()
for i, block := range blocks {
// If we're behind the chain head, only check block, state is available at head
if head.Number.Uint64() > block.NumberU64() {
if !chain.HasBlock(block.Hash(), block.NumberU64()) {
return blocks[i:]
}
continue
}
// If we're above the chain head, state availability is a must
if !chain.HasBlockAndState(block.Hash(), block.NumberU64()) {
return blocks[i:]
}
}
return nil
}
// ExportChain exports a blockchain into the specified file, truncating any data
// already present in the file.
func ExportChain(blockchain *core.BlockChain, fn string) error {
log.Info("Exporting blockchain", "file", fn)
// Open the file handle and potentially wrap with a gzip stream
fh, err := os.OpenFile(fn, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.ModePerm)
if err != nil {
return err
}
defer fh.Close()
var writer io.Writer = fh
if strings.HasSuffix(fn, ".gz") {
writer = gzip.NewWriter(writer)
defer writer.(*gzip.Writer).Close()
}
// Iterate over the blocks and export them
if err := blockchain.Export(writer); err != nil {
return err
}
log.Info("Exported blockchain", "file", fn)
return nil
}
// ExportAppendChain exports a blockchain into the specified file, appending to
// the file if data already exists in it.
func ExportAppendChain(blockchain *core.BlockChain, fn string, first uint64, last uint64) error {
log.Info("Exporting blockchain", "file", fn)
// Open the file handle and potentially wrap with a gzip stream
fh, err := os.OpenFile(fn, os.O_CREATE|os.O_APPEND|os.O_WRONLY, os.ModePerm)
if err != nil {
return err
}
defer fh.Close()
var writer io.Writer = fh
if strings.HasSuffix(fn, ".gz") {
writer = gzip.NewWriter(writer)
defer writer.(*gzip.Writer).Close()
}
// Iterate over the blocks and export them
if err := blockchain.ExportN(writer, first, last); err != nil {
return err
}
log.Info("Exported blockchain to", "file", fn)
return nil
}
// ExportHistory exports blockchain history into the specified directory,
// following the Era format.
func ExportHistory(bc *core.BlockChain, dir string, first, last, step uint64) error {
log.Info("Exporting blockchain history", "dir", dir)
if head := bc.CurrentBlock().Number.Uint64(); head < last {
log.Warn("Last block beyond head, setting last = head", "head", head, "last", last)
last = head
}
network := "unknown"
if name, ok := params.NetworkNames[bc.Config().ChainID.String()]; ok {
network = name
}
if err := os.MkdirAll(dir, os.ModePerm); err != nil {
return fmt.Errorf("error creating output directory: %w", err)
}
var (
start = time.Now()
reported = time.Now()
h = sha256.New()
buf = bytes.NewBuffer(nil)
checksums []string
)
for i := first; i <= last; i += step {
err := func() error {
filename := path.Join(dir, era.Filename(network, int(i/step), common.Hash{}))
f, err := os.Create(filename)
if err != nil {
return fmt.Errorf("could not create era file: %w", err)
}
defer f.Close()
w := era.NewBuilder(f)
for j := uint64(0); j < step && j <= last-i; j++ {
var (
n = i + j
block = bc.GetBlockByNumber(n)
)
if block == nil {
return fmt.Errorf("export failed on #%d: not found", n)
}
receipts := bc.GetReceiptsByHash(block.Hash())
if receipts == nil {
return fmt.Errorf("export failed on #%d: receipts not found", n)
}
td := bc.GetTd(block.Hash(), block.NumberU64())
if td == nil {
return fmt.Errorf("export failed on #%d: total difficulty not found", n)
}
if err := w.Add(block, receipts, td); err != nil {
return err
}
}
root, err := w.Finalize()
if err != nil {
return fmt.Errorf("export failed to finalize %d: %w", step/i, err)
}
// Set correct filename with root.
os.Rename(filename, path.Join(dir, era.Filename(network, int(i/step), root)))
// Compute checksum of entire Era1.
if _, err := f.Seek(0, io.SeekStart); err != nil {
return err
}
if _, err := io.Copy(h, f); err != nil {
return fmt.Errorf("unable to calculate checksum: %w", err)
}
checksums = append(checksums, common.BytesToHash(h.Sum(buf.Bytes()[:])).Hex())
h.Reset()
buf.Reset()
return nil
}()
if err != nil {
return err
}
if time.Since(reported) >= 8*time.Second {
log.Info("Exporting blocks", "exported", i, "elapsed", common.PrettyDuration(time.Since(start)))
reported = time.Now()
}
}
os.WriteFile(path.Join(dir, "checksums.txt"), []byte(strings.Join(checksums, "\n")), os.ModePerm)
log.Info("Exported blockchain to", "dir", dir)
return nil
}
// ImportPreimages imports a batch of exported hash preimages into the database.
// It's a part of the deprecated functionality, should be removed in the future.
func ImportPreimages(db ethdb.Database, fn string) error {
log.Info("Importing preimages", "file", fn)
// Open the file handle and potentially unwrap the gzip stream
fh, err := os.Open(fn)
if err != nil {
return err
}
defer fh.Close()
var reader io.Reader = bufio.NewReader(fh)
if strings.HasSuffix(fn, ".gz") {
if reader, err = gzip.NewReader(reader); err != nil {
return err
}
}
stream := rlp.NewStream(reader, 0)
// Import the preimages in batches to prevent disk thrashing
preimages := make(map[common.Hash][]byte)
for {
// Read the next entry and ensure it's not junk
var blob []byte
if err := stream.Decode(&blob); err != nil {
if err == io.EOF {
break
}
return err
}
// Accumulate the preimages and flush when enough ws gathered
preimages[crypto.Keccak256Hash(blob)] = common.CopyBytes(blob)
if len(preimages) > 1024 {
rawdb.WritePreimages(db, preimages)
preimages = make(map[common.Hash][]byte)
}
}
// Flush the last batch preimage data
if len(preimages) > 0 {
rawdb.WritePreimages(db, preimages)
}
return nil
}
// ExportPreimages exports all known hash preimages into the specified file,
// truncating any data already present in the file.
// It's a part of the deprecated functionality, should be removed in the future.
func ExportPreimages(db ethdb.Database, fn string) error {
log.Info("Exporting preimages", "file", fn)
// Open the file handle and potentially wrap with a gzip stream
fh, err := os.OpenFile(fn, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.ModePerm)
if err != nil {
return err
}
defer fh.Close()
var writer io.Writer = fh
if strings.HasSuffix(fn, ".gz") {
writer = gzip.NewWriter(writer)
defer writer.(*gzip.Writer).Close()
}
// Iterate over the preimages and export them
it := db.NewIterator([]byte("secure-key-"), nil)
defer it.Release()
for it.Next() {
if err := rlp.Encode(writer, it.Value()); err != nil {
return err
}
}
log.Info("Exported preimages", "file", fn)
return nil
}
// ExportSnapshotPreimages exports the preimages corresponding to the enumeration of
// the snapshot for a given root.
func ExportSnapshotPreimages(chaindb ethdb.Database, snaptree *snapshot.Tree, fn string, root common.Hash) error {
log.Info("Exporting preimages", "file", fn)
fh, err := os.OpenFile(fn, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.ModePerm)
if err != nil {
return err
}
defer fh.Close()
// Enable gzip compressing if file name has gz suffix.
var writer io.Writer = fh
if strings.HasSuffix(fn, ".gz") {
gz := gzip.NewWriter(writer)
defer gz.Close()
writer = gz
}
buf := bufio.NewWriter(writer)
defer buf.Flush()
writer = buf
type hashAndPreimageSize struct {
Hash common.Hash
Size int
}
hashCh := make(chan hashAndPreimageSize)
var (
start = time.Now()
logged = time.Now()
preimages int
)
go func() {
defer close(hashCh)
accIt, err := snaptree.AccountIterator(root, common.Hash{})
if err != nil {
log.Error("Failed to create account iterator", "error", err)
return
}
defer accIt.Release()
for accIt.Next() {
acc, err := types.FullAccount(accIt.Account())
if err != nil {
log.Error("Failed to get full account", "error", err)
return
}
preimages += 1
hashCh <- hashAndPreimageSize{Hash: accIt.Hash(), Size: common.AddressLength}
if acc.Root != (common.Hash{}) && acc.Root != types.EmptyRootHash {
stIt, err := snaptree.StorageIterator(root, accIt.Hash(), common.Hash{})
if err != nil {
log.Error("Failed to create storage iterator", "error", err)
return
}
for stIt.Next() {
preimages += 1
hashCh <- hashAndPreimageSize{Hash: stIt.Hash(), Size: common.HashLength}
if time.Since(logged) > time.Second*8 {
logged = time.Now()
log.Info("Exporting preimages", "count", preimages, "elapsed", common.PrettyDuration(time.Since(start)))
}
}
stIt.Release()
}
if time.Since(logged) > time.Second*8 {
logged = time.Now()
log.Info("Exporting preimages", "count", preimages, "elapsed", common.PrettyDuration(time.Since(start)))
}
}
}()
for item := range hashCh {
preimage := rawdb.ReadPreimage(chaindb, item.Hash)
if len(preimage) == 0 {
return fmt.Errorf("missing preimage for %v", item.Hash)
}
if len(preimage) != item.Size {
return fmt.Errorf("invalid preimage size, have %d", len(preimage))
}
rlpenc, err := rlp.EncodeToBytes(preimage)
if err != nil {
return fmt.Errorf("error encoding preimage: %w", err)
}
if _, err := writer.Write(rlpenc); err != nil {
return fmt.Errorf("failed to write preimage: %w", err)
}
}
log.Info("Exported preimages", "count", preimages, "elapsed", common.PrettyDuration(time.Since(start)), "file", fn)
return nil
}
// exportHeader is used in the export/import flow. When we do an export,
// the first element we output is the exportHeader.
// Whenever a backwards-incompatible change is made, the Version header
// should be bumped.
// If the importer sees a higher version, it should reject the import.
type exportHeader struct {
Magic string // Always set to 'gethdbdump' for disambiguation
Version uint64
Kind string
UnixTime uint64
}
const exportMagic = "gethdbdump"
const (
OpBatchAdd = 0
OpBatchDel = 1
)
// ImportLDBData imports a batch of snapshot data into the database
func ImportLDBData(db ethdb.Database, f string, startIndex int64, interrupt chan struct{}) error {
log.Info("Importing leveldb data", "file", f)
// Open the file handle and potentially unwrap the gzip stream
fh, err := os.Open(f)
if err != nil {
return err
}
defer fh.Close()
var reader io.Reader = bufio.NewReader(fh)
if strings.HasSuffix(f, ".gz") {
if reader, err = gzip.NewReader(reader); err != nil {
return err
}
}
stream := rlp.NewStream(reader, 0)
// Read the header
var header exportHeader
if err := stream.Decode(&header); err != nil {
return fmt.Errorf("could not decode header: %v", err)
}
if header.Magic != exportMagic {
return errors.New("incompatible data, wrong magic")
}
if header.Version != 0 {
return fmt.Errorf("incompatible version %d, (support only 0)", header.Version)
}
log.Info("Importing data", "file", f, "type", header.Kind, "data age",
common.PrettyDuration(time.Since(time.Unix(int64(header.UnixTime), 0))))
// Import the snapshot in batches to prevent disk thrashing
var (
count int64
start = time.Now()
logged = time.Now()
batch = db.NewBatch()
)
for {
// Read the next entry
var (
op byte
key, val []byte
)
if err := stream.Decode(&op); err != nil {
if err == io.EOF {
break
}
return err
}
if err := stream.Decode(&key); err != nil {
return err
}
if err := stream.Decode(&val); err != nil {
return err
}
if count < startIndex {
count++
continue
}
switch op {
case OpBatchDel:
batch.Delete(key)
case OpBatchAdd:
batch.Put(key, val)
default:
return fmt.Errorf("unknown op %d", op)
}
if batch.ValueSize() > ethdb.IdealBatchSize {
if err := batch.Write(); err != nil {
return err
}
batch.Reset()
}
// Check interruption emitted by ctrl+c
if count%1000 == 0 {
select {
case <-interrupt:
if err := batch.Write(); err != nil {
return err
}
log.Info("External data import interrupted", "file", f, "count", count, "elapsed", common.PrettyDuration(time.Since(start)))
return nil
default:
}
}
if count%1000 == 0 && time.Since(logged) > 8*time.Second {
log.Info("Importing external data", "file", f, "count", count, "elapsed", common.PrettyDuration(time.Since(start)))
logged = time.Now()
}
count += 1
}
// Flush the last batch snapshot data
if batch.ValueSize() > 0 {
if err := batch.Write(); err != nil {
return err
}
}
log.Info("Imported chain data", "file", f, "count", count,
"elapsed", common.PrettyDuration(time.Since(start)))
return nil
}
// ChainDataIterator is an interface wraps all necessary functions to iterate
// the exporting chain data.
type ChainDataIterator interface {
// Next returns the key-value pair for next exporting entry in the iterator.
// When the end is reached, it will return (0, nil, nil, false).
Next() (byte, []byte, []byte, bool)
// Release releases associated resources. Release should always succeed and can
// be called multiple times without causing error.
Release()
}
// ExportChaindata exports the given data type (truncating any data already present)
// in the file. If the suffix is 'gz', gzip compression is used.
func ExportChaindata(fn string, kind string, iter ChainDataIterator, interrupt chan struct{}) error {
log.Info("Exporting chain data", "file", fn, "kind", kind)
defer iter.Release()
// Open the file handle and potentially wrap with a gzip stream
fh, err := os.OpenFile(fn, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.ModePerm)
if err != nil {
return err
}
defer fh.Close()
var writer io.Writer = fh
if strings.HasSuffix(fn, ".gz") {
writer = gzip.NewWriter(writer)
defer writer.(*gzip.Writer).Close()
}
// Write the header
if err := rlp.Encode(writer, &exportHeader{
Magic: exportMagic,
Version: 0,
Kind: kind,
UnixTime: uint64(time.Now().Unix()),
}); err != nil {
return err
}
// Extract data from source iterator and dump them out to file
var (
count int64
start = time.Now()
logged = time.Now()
)
for {
op, key, val, ok := iter.Next()
if !ok {
break
}
if err := rlp.Encode(writer, op); err != nil {
return err
}
if err := rlp.Encode(writer, key); err != nil {
return err
}
if err := rlp.Encode(writer, val); err != nil {
return err
}
if count%1000 == 0 {
// Check interruption emitted by ctrl+c
select {
case <-interrupt:
log.Info("Chain data exporting interrupted", "file", fn,
"kind", kind, "count", count, "elapsed", common.PrettyDuration(time.Since(start)))
return nil
default:
}
if time.Since(logged) > 8*time.Second {
log.Info("Exporting chain data", "file", fn, "kind", kind,
"count", count, "elapsed", common.PrettyDuration(time.Since(start)))
logged = time.Now()
}
}
count++
}
log.Info("Exported chain data", "file", fn, "kind", kind, "count", count,
"elapsed", common.PrettyDuration(time.Since(start)))
return nil
}