Module frame_support::storage::child

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Expand description

Operation on runtime child storages.

This module is a currently only a variant of unhashed with additional child_info.

Structs§

Enums§

  • Information related to a child state.
  • Type of child. It does not strictly define different child type, it can also be related to technical consideration or api variant.
  • The outcome of calling storage_kill. Returned value is the number of storage items removed from the backend from making the storage_kill call.
  • Different possible state version.

Functions§

  • Partially clear the child storage of each key-value pair.
  • Check to see if key has an explicit entry in storage.
  • Return the value of the item in storage under key, or None if there is no explicit entry.
  • Return the value of the item in storage under key, or default_value if there is no explicit entry.
  • Return the value of the item in storage under key, or the type’s default if there is no explicit entry.
  • Return the value of the item in storage under key, or default_value() if there is no explicit entry.
  • Get a Vec of bytes from storage.
  • Ensure key has no explicit entry in storage.
  • kill_storageDeprecated
    Remove all storage_key key/values
  • Return the length in bytes of the value without reading it. None if it does not exist.
  • Put value in storage under key.
  • Put a raw byte slice into storage.
  • Calculate current child root value.
  • Remove key from storage, returning its value if it had an explicit entry or None otherwise.
  • Return the value of the item in storage under key, or default_value if there is no explicit entry. Ensure there is no explicit entry on return.
  • Remove key from storage, returning its value, or, if there was no explicit entry in storage, the default for its type.
  • Return the value of the item in storage under key, or default_value() if there is no explicit entry. Ensure there is no explicit entry on return.