9d329e111e
In this commit, we follow up our previous migration to reset our synced block to our birthday block with another migration to drop our transaction history. We'll need to do this to ensure that the transaction store matches the exact state of our outputs on-chain to prevent inadvertently crafting any invalid transactions.
111 lines
3.3 KiB
Go
111 lines
3.3 KiB
Go
package wtxmgr
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import (
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"github.com/btcsuite/btcwallet/walletdb"
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"github.com/btcsuite/btcwallet/walletdb/migration"
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)
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// versions is a list of the different database versions. The last entry should
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// reflect the latest database state. If the database happens to be at a version
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// number lower than the latest, migrations will be performed in order to catch
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// it up.
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var versions = []migration.Version{
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{
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Number: 1,
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Migration: nil,
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},
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{
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Number: 2,
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Migration: dropTransactionHistory,
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},
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}
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// getLatestVersion returns the version number of the latest database version.
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func getLatestVersion() uint32 {
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return versions[len(versions)-1].Number
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}
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// MigrationManager is an implementation of the migration.Manager interface that
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// will be used to handle migrations for the address manager. It exposes the
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// necessary parameters required to successfully perform migrations.
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type MigrationManager struct {
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ns walletdb.ReadWriteBucket
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}
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// A compile-time assertion to ensure that MigrationManager implements the
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// migration.Manager interface.
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var _ migration.Manager = (*MigrationManager)(nil)
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// NewMigrationManager creates a new migration manager for the transaction
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// manager. The given bucket should reflect the top-level bucket in which all
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// of the transaction manager's data is contained within.
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func NewMigrationManager(ns walletdb.ReadWriteBucket) *MigrationManager {
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return &MigrationManager{ns: ns}
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}
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// Name returns the name of the service we'll be attempting to upgrade.
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//
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// NOTE: This method is part of the migration.Manager interface.
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func (m *MigrationManager) Name() string {
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return "wallet transaction manager"
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}
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// Namespace returns the top-level bucket of the service.
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//
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// NOTE: This method is part of the migration.Manager interface.
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func (m *MigrationManager) Namespace() walletdb.ReadWriteBucket {
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return m.ns
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}
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// CurrentVersion returns the current version of the service's database.
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//
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// NOTE: This method is part of the migration.Manager interface.
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func (m *MigrationManager) CurrentVersion(ns walletdb.ReadBucket) (uint32, error) {
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if ns == nil {
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ns = m.ns
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}
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return fetchVersion(m.ns)
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}
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// SetVersion sets the version of the service's database.
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//
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// NOTE: This method is part of the migration.Manager interface.
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func (m *MigrationManager) SetVersion(ns walletdb.ReadWriteBucket,
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version uint32) error {
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if ns == nil {
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ns = m.ns
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}
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return putVersion(m.ns, version)
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}
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// Versions returns all of the available database versions of the service.
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//
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// NOTE: This method is part of the migration.Manager interface.
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func (m *MigrationManager) Versions() []migration.Version {
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return versions
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}
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// dropTransactionHistory is a migration that attempts to recreate the
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// transaction store with a clean state.
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func dropTransactionHistory(ns walletdb.ReadWriteBucket) error {
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log.Info("Dropping wallet transaction history")
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// To drop the store's transaction history, we'll need to remove all of
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// the relevant descendant buckets and key/value pairs.
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if err := deleteBuckets(ns); err != nil {
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return err
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}
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if err := ns.Delete(rootMinedBalance); err != nil {
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return err
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}
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// With everything removed, we'll now recreate our buckets.
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if err := createBuckets(ns); err != nil {
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return err
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}
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// Finally, we'll insert a 0 value for our mined balance.
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return putMinedBalance(ns, 0)
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}
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