Trait TrieLayout

pub trait TrieLayout {
    type Hash: Hasher;
    type Codec: NodeCodec<HashOut = <Self::Hash as Hasher>::Out>;

    const USE_EXTENSION: bool;
    const MAX_INLINE_VALUE: Option<u32>;
    const ALLOW_EMPTY: bool = false;
}

Various re-exports from the trie-db crate. Trait with definition of trie layout. Contains all associated trait needed for a trie definition or implementation.

Required Associated Constants

const USE_EXTENSION: bool

If true, the trie will use extension nodes and no partial in branch, if false the trie will only use branch and node with partials in both.

const MAX_INLINE_VALUE: Option<u32>

Threshold above which an external node should be use to store a node value.

Provided Associated Constants

const ALLOW_EMPTY: bool = false

If true, the trie will allow empty values into TrieDBMut

Required Associated Types

type Hash: Hasher

Hasher to use for this trie.

type Codec: NodeCodec<HashOut = <Self::Hash as Hasher>::Out>

Codec to use (needs to match hasher and nibble ops).

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<H> TrieLayout for LayoutV0<H>

where H: Hasher,

const USE_EXTENSION: bool = false

const ALLOW_EMPTY: bool = true

const MAX_INLINE_VALUE: Option<u32> = None

type Hash = H

type Codec = NodeCodec<<LayoutV0<H> as TrieLayout>::Hash>

impl<H> TrieLayout for LayoutV1<H>

where H: Hasher,

const USE_EXTENSION: bool = false

const ALLOW_EMPTY: bool = true

const MAX_INLINE_VALUE: Option<u32> = _

type Hash = H

type Codec = NodeCodec<<LayoutV1<H> as TrieLayout>::Hash>