Struct SubstrateV1

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pub struct SubstrateV1<H>(/* private fields */);
Expand description

substrate trie layout, with external value nodes.

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impl<H> TrieConfiguration for LayoutV1<H>
where H: Hasher + Debug,

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fn trie_root<I, A, B>(input: I) -> <Self::Hash as Hasher>::Out
where I: IntoIterator<Item = (A, B)>, A: AsRef<[u8]> + Ord, B: AsRef<[u8]>,

Determines a trie root given its ordered contents, closed form.
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fn trie_root_unhashed<I, A, B>(input: I) -> Vec<u8>
where I: IntoIterator<Item = (A, B)>, A: AsRef<[u8]> + Ord, B: AsRef<[u8]>,

Determines a trie root node’s data given its ordered contents, closed form.
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fn encode_index(input: u32) -> Vec<u8>

Encoding of index as a key (when reusing general trie for indexed trie).
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fn trie_build<DB, I, A, B>(db: &mut DB, input: I) -> <Self::Hash as Hasher>::Out
where DB: HashDB<Self::Hash, Vec<u8>>, I: IntoIterator<Item = (A, B)>, A: AsRef<[u8]> + Ord, B: AsRef<[u8]>,

Operation to build a trie db from its ordered iterator over its key/values.
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fn ordered_trie_root<I, A>(input: I) -> <Self::Hash as Hasher>::Out
where I: IntoIterator<Item = A>, A: AsRef<[u8]>,

A trie root formed from the items, with keys attached according to their compact-encoded index (using parity-codec crate).
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impl<H> TrieLayout for LayoutV1<H>
where H: Hasher + Debug,

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const USE_EXTENSION: bool = false

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.
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const ALLOW_EMPTY: bool = true

If true, the trie will allow empty values into TrieDBMut
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const MAX_INLINE_VALUE: Option<u32>

Threshold above which an external node should be use to store a node value.
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type Hash = H

Hasher to use for this trie.
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type Codec = NodeCodec<<LayoutV1<H> as TrieLayout>::Hash>

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

Auto Trait Implementations§

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impl<H> Freeze for LayoutV1<H>

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impl<H> RefUnwindSafe for LayoutV1<H>
where H: RefUnwindSafe,

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impl<H> Send for LayoutV1<H>
where H: Send,

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impl<H> Sync for LayoutV1<H>
where H: Sync,

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impl<H> Unpin for LayoutV1<H>
where H: Unpin,

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impl<H> UnwindSafe for LayoutV1<H>
where H: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.