mirror of https://github.com/guggero/chantools
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
109 lines
2.7 KiB
Go
109 lines
2.7 KiB
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/lightninglabs/chantools/lnd"
|
|
"github.com/lightningnetwork/lnd/chanbackup"
|
|
"github.com/lightningnetwork/lnd/keychain"
|
|
"github.com/spf13/cobra"
|
|
)
|
|
|
|
type filterBackupCommand struct {
|
|
MultiFile string
|
|
Discard string
|
|
|
|
rootKey *rootKey
|
|
cmd *cobra.Command
|
|
}
|
|
|
|
func newFilterBackupCommand() *cobra.Command {
|
|
cc := &filterBackupCommand{}
|
|
cc.cmd = &cobra.Command{
|
|
Use: "filterbackup",
|
|
Short: "Filter an lnd channel.backup file and remove certain " +
|
|
"channels",
|
|
Long: `Filter an lnd channel.backup file by removing certain
|
|
channels (identified by their funding transaction outpoints).`,
|
|
Example: `chantools filterbackup \
|
|
--multi_file ~/.lnd/data/chain/bitcoin/mainnet/channel.backup \
|
|
--discard 2abcdef2b2bffaaa...db0abadd:1,4abcdef2b2bffaaa...db8abadd:0`,
|
|
RunE: cc.Execute,
|
|
}
|
|
cc.cmd.Flags().StringVar(
|
|
&cc.MultiFile, "multi_file", "", "lnd channel.backup file to "+
|
|
"filter",
|
|
)
|
|
cc.cmd.Flags().StringVar(
|
|
&cc.Discard, "discard", "", "comma separated list of channel "+
|
|
"funding outpoints (format <fundingTXID>:<index>) to "+
|
|
"remove from the backup file",
|
|
)
|
|
|
|
cc.rootKey = newRootKey(cc.cmd, "decrypting the backup")
|
|
|
|
return cc.cmd
|
|
}
|
|
|
|
func (c *filterBackupCommand) Execute(_ *cobra.Command, _ []string) error {
|
|
extendedKey, err := c.rootKey.read()
|
|
if err != nil {
|
|
return fmt.Errorf("error reading root key: %w", err)
|
|
}
|
|
|
|
// Parse discard filter.
|
|
discard := strings.Split(c.Discard, ",")
|
|
|
|
// Check that we have a backup file.
|
|
if c.MultiFile == "" {
|
|
return fmt.Errorf("backup file is required")
|
|
}
|
|
multiFile := chanbackup.NewMultiFile(c.MultiFile)
|
|
keyRing := &lnd.HDKeyRing{
|
|
ExtendedKey: extendedKey,
|
|
ChainParams: chainParams,
|
|
}
|
|
return filterChannelBackup(multiFile, keyRing, discard)
|
|
}
|
|
|
|
func filterChannelBackup(multiFile *chanbackup.MultiFile, ring keychain.KeyRing,
|
|
discard []string) error {
|
|
|
|
multi, err := multiFile.ExtractMulti(ring)
|
|
if err != nil {
|
|
return fmt.Errorf("could not extract multi file: %w", err)
|
|
}
|
|
|
|
keep := make([]chanbackup.Single, 0, len(multi.StaticBackups))
|
|
for _, single := range multi.StaticBackups {
|
|
found := false
|
|
for _, discardChanPoint := range discard {
|
|
if single.FundingOutpoint.String() == discardChanPoint {
|
|
found = true
|
|
}
|
|
}
|
|
if found {
|
|
continue
|
|
}
|
|
keep = append(keep, single)
|
|
}
|
|
multi.StaticBackups = keep
|
|
|
|
fileName := fmt.Sprintf("results/backup-filtered-%s.backup",
|
|
time.Now().Format("2006-01-02-15-04-05"))
|
|
log.Infof("Writing result to %s", fileName)
|
|
f, err := os.OpenFile(fileName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
err = multi.PackToWriter(f, ring)
|
|
_ = f.Close()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|