Module migrations

Structs

• EnterSafeModeOnFailedMigration
  Enter safe mode on a failed runtime upgrade.
• FreezeChainOnFailedMigration
  Do now allow any transactions to be processed after a runtime upgrade failed.
• MigrationId
  A generic migration identifier that can be used by MBMs.
• RemovePallet
  RemovePallet is a utility struct used to remove all storage items associated with a specific pallet.
• RemoveStorage
  RemoveStorage is a utility struct used to remove a storage item from a specific pallet.
• VersionedMigration
  Handles storage migration pallet versioning.

Enums

• FailedMigrationHandling
  How to proceed after a runtime upgrade failed.
• SteppedMigrationError
  Error that can occur during a SteppedMigration.
• VersionedPostUpgradeData
  A helper enum to wrap the pre_upgrade bytes like an Option before passing them to post_upgrade. This enum is used rather than an Option to make the API clearer to the developer.

Traits

• FailedMigrationHandler
  Handles a failed runtime migration.
• MigrationStatusHandler
  Notification handler for status updates regarding Multi-Block-Migrations.
• MultiStepMigrator
  Something that can do multi step migrations.
• PalletVersionToStorageVersionHelper
  Trait used by migrate_from_pallet_version_to_storage_version to do the actual migration.
• SteppedMigration
  A migration that can proceed in multiple steps.
• SteppedMigrations
  Multiple SteppedMigration.
• StoreInCodeStorageVersion
  Can store the in-code pallet version on-chain.

Functions

• migrate_from_pallet_version_to_storage_version
  Migrate from the PalletVersion struct to the new StorageVersion struct.