Module frame_support::storage::migration

Some utilities for helping access storage with arbitrary key types.

Structs

• StorageIterator
  Utility to iterate through raw items in storage.
• StorageKeyIterator
  Utility to iterate through raw items in storage.

Functions

• clear_storage_prefix
  Attempt to remove all values under a storage prefix by the module, the map’s item name and the key hash.
• get_storage_value
  Get a particular value in storage by the module, the map’s item name and the key hash.
• have_storage_value
  Get a particular value in storage by the module, the map’s item name and the key hash.
• move_pallet
  Move all storages from a pallet prefix to another pallet prefix.
• move_prefix
  Move all (key, value) after some prefix to the another prefix
• move_storage_from_pallet
  Move a storage from a pallet prefix to another pallet prefix.
• put_storage_value
  Put a particular value into storage by the module, the map’s item name and the key hash.
• remove_storage_prefixDeprecated
  Remove all items under a storage prefix by the module, the map’s item name and the key hash.
• storage_iter
  Construct iterator to iterate over map items in module for the map called item.
• storage_iter_with_suffix
  Construct iterator to iterate over map items in module for the map called item.
• storage_key_iter
  Construct iterator to iterate over map items in module for the map called item.
• storage_key_iter_with_suffix
  Construct iterator to iterate over map items in module for the map called item.
• take_storage_item
  Take a particular item in storage by the module, the map’s item name and the key hash.
• take_storage_value
  Take a particular value in storage by the module, the map’s item name and the key hash.