mirror of
https://github.com/lightningnetwork/lnd.git
synced 2025-02-24 14:50:40 +01:00
383a6d274f
Add a new mcRoute type that houses the data about a route that MC actually uses. Then add a migration (channeldb/migration32) that migrates the existing store from its current serialisation to the new, more minimal serialisation.
53 lines
1.6 KiB
Go
53 lines
1.6 KiB
Go
package migration32
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
|
|
"github.com/lightningnetwork/lnd/kvdb"
|
|
)
|
|
|
|
// MigrateMCRouteSerialisation reads all the mission control store entries and
|
|
// re-serializes them using a minimal route serialisation so that only the parts
|
|
// of the route that are actually required for mission control are persisted.
|
|
func MigrateMCRouteSerialisation(tx kvdb.RwTx) error {
|
|
log.Infof("Migrating Mission Control store to use a more minimal " +
|
|
"encoding for routes")
|
|
|
|
resultBucket := tx.ReadWriteBucket(resultsKey)
|
|
|
|
// If the results bucket does not exist then there are no entries in
|
|
// the mission control store yet and so there is nothing to migrate.
|
|
if resultBucket == nil {
|
|
return nil
|
|
}
|
|
|
|
// For each entry, read it into memory using the old encoding. Then,
|
|
// extract the more minimal route, re-encode and persist the entry.
|
|
return resultBucket.ForEach(func(k, v []byte) error {
|
|
// Read the entry using the old encoding.
|
|
resultOld, err := deserializeOldResult(k, v)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Convert to the new payment result format with the minimal
|
|
// route.
|
|
resultNew := convertPaymentResult(resultOld)
|
|
|
|
// Serialise the new payment result using the new encoding.
|
|
key, resultNewBytes, err := serializeNewResult(resultNew)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Make sure that the derived key is the same.
|
|
if !bytes.Equal(key, k) {
|
|
return fmt.Errorf("new payment result key (%v) is "+
|
|
"not the same as the old key (%v)", key, k)
|
|
}
|
|
|
|
// Finally, overwrite the previous value with the new encoding.
|
|
return resultBucket.Put(k, resultNewBytes)
|
|
})
|
|
}
|