Module frame_support::storage::child

Operation on runtime child storages.

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

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.
KillOutcome	The outcome of calling kill_storage.

Functions

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_storage	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.