Module frame_support::storage::child

Operation on runtime child storages.

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

Structs

• MultiRemovalResults
  Results concerning an operation to remove many keys.

Enums

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

Functions

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