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106 lines
2.9 KiB
Go
106 lines
2.9 KiB
Go
package main
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import (
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"fmt"
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"strconv"
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"strings"
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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"github.com/btcsuite/btcd/wire"
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"github.com/lightninglabs/chantools/lnd"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/spf13/cobra"
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)
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type removeChannelCommand struct {
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ChannelDB string
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Channel string
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cmd *cobra.Command
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}
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func newRemoveChannelCommand() *cobra.Command {
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cc := &removeChannelCommand{}
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cc.cmd = &cobra.Command{
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Use: "removechannel",
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Short: "Remove a single channel from the given channel DB",
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Long: `Opens the given channel DB in write mode and removes one
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single channel from it. This means giving up on any state (and therefore coins)
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of that channel and should only be used if the funding transaction of the
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channel was never confirmed on chain!
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CAUTION: Running this command will make it impossible to use the channel DB
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with an older version of lnd. Downgrading is not possible and you'll need to
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run lnd ` + lndVersion + ` or later after using this command!`,
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Example: `chantools removechannel \
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--channeldb ~/.lnd/data/graph/mainnet/channel.db \
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--channel 3149764effbe82718b280de425277e5e7b245a4573aa4a0203ac12cee1c37816:0`,
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RunE: cc.Execute,
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}
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cc.cmd.Flags().StringVar(
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&cc.ChannelDB, "channeldb", "", "lnd channel.backup file to "+
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"remove the channel from",
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)
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cc.cmd.Flags().StringVar(
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&cc.Channel, "channel", "", "channel to remove from the DB "+
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"file, identified by its channel point "+
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"(<txid>:<txindex>)",
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)
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return cc.cmd
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}
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func (c *removeChannelCommand) Execute(_ *cobra.Command, _ []string) error {
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// Check that we have a channel DB.
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if c.ChannelDB == "" {
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return fmt.Errorf("channel DB is required")
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}
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db, err := lnd.OpenDB(c.ChannelDB, false)
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if err != nil {
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return fmt.Errorf("error opening channel DB: %w", err)
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}
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defer func() {
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if err := db.Close(); err != nil {
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log.Errorf("Error closing DB: %w", err)
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}
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}()
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parts := strings.Split(c.Channel, ":")
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if len(parts) != 2 {
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return fmt.Errorf("invalid channel point format: %v", c.Channel)
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}
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hash, err := chainhash.NewHashFromStr(parts[0])
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if err != nil {
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return err
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}
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index, err := strconv.ParseUint(parts[1], 10, 64)
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if err != nil {
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return err
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}
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return removeChannel(db.ChannelStateDB(), &wire.OutPoint{
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Hash: *hash,
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Index: uint32(index),
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})
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}
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func removeChannel(db *channeldb.ChannelStateDB,
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chanPoint *wire.OutPoint) error {
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dbChan, err := db.FetchChannel(nil, *chanPoint)
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if err != nil {
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return err
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}
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if err := dbChan.MarkBorked(); err != nil {
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return err
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}
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// Abandoning a channel is a three step process: remove from the open
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// channel state, remove from the graph, remove from the contract
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// court. Between any step it's possible that the users restarts the
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// process all over again. As a result, each of the steps below are
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// intended to be idempotent.
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return db.AbandonChannel(chanPoint, uint32(100000))
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}
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