Enum frame_support::storage::child::ChildInfo

pub enum ChildInfo<'a> {
    Default(ChildTrie<'a>),
}

Information related to a child state.

Variants

Default(ChildTrie<'a>)

Methods

impl<'a> ChildInfo<'a>

pub const fn new_default(unique_id: &'a [u8]) -> ChildInfo<'a>

Instantiates information for a default child trie.

pub fn to_owned(&self) -> OwnedChildInfo

Instantiates a owned version of this child info.

pub fn resolve_child_info(
    child_type: u32,
    data: &'a [u8]
) -> Option<ChildInfo<'a>>

Create child info from a linear byte packed value and a given type.

pub fn info(&self) -> (&[u8], u32)

Return a single byte vector containing packed child info content and its child info type. This can be use as input for resolve_child_info.

Important traits for &'_ mut [u8]

impl<'_> Write for &'_ mut [u8]impl<'_> Read for &'_ [u8]

pub fn keyspace(&self) -> &[u8]

Return byte sequence (keyspace) that can be use by underlying db to isolate keys. This is a unique id of the child trie. The collision resistance of this value depends on the type of child info use. For ChildInfo::Default it is and need to be.

Trait Implementations

impl<'a> Clone for ChildInfo<'a>

fn clone(&self) -> ChildInfo<'a>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Copy for ChildInfo<'a>