Trait TrieKeyAdapter 

pub trait TrieKeyAdapter:
    Clone
    + Send
    + Sync
    + 'static {
    type AccountKey: Key + From<Nibbles> + Clone;
    type StorageSubKey: Key + From<Nibbles> + Clone + PartialEq;
    type StorageValue: Value + StorageTrieEntryLike<SubKey = Self::StorageSubKey>;

    // Required methods
    fn account_key_to_nibbles(key: &Self::AccountKey) -> Nibbles;
    fn subkey_to_nibbles(subkey: &Self::StorageSubKey) -> Nibbles;
}

Trait abstracting nibble encoding for trie keys.

Allows the same cursor implementation to work with both legacy (65-byte) and packed (33-byte) nibble encodings. The underlying cursor types are monomorphized per adapter, while DatabaseTrieCursorFactory selects the encoding at runtime.

Required Associated Types

type AccountKey: Key + From<Nibbles> + Clone

The key type for account trie lookups (e.g., StoredNibbles or PackedStoredNibbles).

type StorageSubKey: Key + From<Nibbles> + Clone + PartialEq

The subkey type for storage trie DupSort lookups (e.g., StoredNibblesSubKey or PackedStoredNibblesSubKey).

type StorageValue: Value + StorageTrieEntryLike<SubKey = Self::StorageSubKey>

The storage trie entry type that pairs a subkey with a BranchNodeCompact.

Required Methods

fn account_key_to_nibbles(key: &Self::AccountKey) -> Nibbles

Convert an account key back to Nibbles.

fn subkey_to_nibbles(subkey: &Self::StorageSubKey) -> Nibbles

Convert a storage subkey back to Nibbles.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl TrieKeyAdapter for LegacyKeyAdapter

type AccountKey = StoredNibbles

type StorageSubKey = StoredNibblesSubKey

type StorageValue = StorageTrieEntry

impl TrieKeyAdapter for PackedKeyAdapter

type AccountKey = PackedStoredNibbles

type StorageSubKey = PackedStoredNibblesSubKey

type StorageValue = PackedStorageTrieEntry