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38 lines
967 B
Go
38 lines
967 B
Go
package lnd
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import (
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"bytes"
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"fmt"
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"github.com/lightningnetwork/lnd/chanbackup"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/lightningnetwork/lnd/keychain"
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)
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// CreateChannelBackup creates a channel backup file from all channels found in
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// the given DB file, encrypted with the key in the key ring.
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func CreateChannelBackup(db *channeldb.DB, multiFile *chanbackup.MultiFile,
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ring keychain.KeyRing) error {
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singles, err := chanbackup.FetchStaticChanBackups(
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db.ChannelStateDB(), db,
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)
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if err != nil {
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return fmt.Errorf("error extracting channel backup: %w", err)
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}
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multi := &chanbackup.Multi{
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Version: chanbackup.DefaultMultiVersion,
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StaticBackups: singles,
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}
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var b bytes.Buffer
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err = multi.PackToWriter(&b, ring)
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if err != nil {
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return fmt.Errorf("unable to pack backup: %w", err)
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}
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err = multiFile.UpdateAndSwap(b.Bytes())
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if err != nil {
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return fmt.Errorf("unable to write backup file: %w", err)
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}
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return nil
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}
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