pub struct StorageProof { /* private fields */ }
Expand description

A proof that some set of key-value pairs are included in the storage trie. The proof contains the storage values so that the partial storage backend can be reconstructed by a verifier that does not already have access to the key-value pairs.

The proof consists of the set of serialized nodes in the storage trie accessed when looking up the keys covered by the proof. Verifying the proof requires constructing the partial trie from the serialized nodes and performing the key lookups.

Implementations§

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impl StorageProof

pub fn new(trie_nodes: impl IntoIterator<Item = Vec<u8>>) -> StorageProof

Constructs a storage proof from a subset of encoded trie nodes in a storage backend.

pub fn empty() -> StorageProof

Returns a new empty proof.

An empty proof is capable of only proving trivial statements (ie. that an empty set of key-value pairs exist in storage).

pub fn is_empty(&self) -> bool

Returns whether this is an empty proof.

pub fn into_iter_nodes(self) -> impl DoubleEndedIterator

Convert into an iterator over encoded trie nodes in lexicographical order constructed from the proof.

pub fn iter_nodes(&self) -> impl DoubleEndedIterator

Create an iterator over encoded trie nodes in lexicographical order constructed from the proof.

pub fn into_nodes(self) -> BTreeSet<Vec<u8>>

Convert into plain node vector.

pub fn into_memory_db<H>(self) -> MemoryDB<H, HashKey<H>, Vec<u8>>
where H: Hasher,

Creates a MemoryDB from Self.

pub fn to_memory_db<H>(&self) -> MemoryDB<H, HashKey<H>, Vec<u8>>
where H: Hasher,

Creates a MemoryDB from Self reference.

pub fn merge(proofs: impl IntoIterator<Item = StorageProof>) -> StorageProof

Merges multiple storage proofs covering potentially different sets of keys into one proof covering all keys. The merged proof output may be smaller than the aggregate size of the input proofs due to deduplication of trie nodes.

pub fn into_compact_proof<H>( self, root: <H as Hasher>::Out ) -> Result<CompactProof, Error<<H as Hasher>::Out, Error<<H as Hasher>::Out>>>
where H: Hasher,

Encode as a compact proof with default trie layout.

pub fn to_compact_proof<H>( &self, root: <H as Hasher>::Out ) -> Result<CompactProof, Error<<H as Hasher>::Out, Error<<H as Hasher>::Out>>>
where H: Hasher,

Encode as a compact proof with default trie layout.

pub fn encoded_compact_size<H>(self, root: <H as Hasher>::Out) -> Option<usize>
where H: Hasher,

Returns the estimated encoded size of the compact proof.

Running this operation is a slow operation (build the whole compact proof) and should only be in non sensitive path.

Return None on error.

Trait Implementations§

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impl Clone for StorageProof

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fn clone(&self) -> StorageProof

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for StorageProof

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl Decode for StorageProof

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fn decode<__CodecInputEdqy>( __codec_input_edqy: &mut __CodecInputEdqy ) -> Result<StorageProof, Error>
where __CodecInputEdqy: Input,

Attempt to deserialise the value from input.
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fn decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self> ) -> Result<DecodeFinished, Error>
where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory. Read more
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fn skip<I>(input: &mut I) -> Result<(), Error>
where I: Input,

Attempt to skip the encoded value from input. Read more
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fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type. Read more
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impl Encode for StorageProof

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fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding. Read more
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fn encode_to<__CodecOutputEdqy>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy )
where __CodecOutputEdqy: Output + ?Sized,

Convert self to a slice and append it to the destination.
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fn encode(&self) -> Vec<u8>

Convert self to an owned vector.
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fn using_encoded<__CodecOutputReturn, __CodecUsingEncodedCallback>( &self, f: __CodecUsingEncodedCallback ) -> __CodecOutputReturn
where __CodecUsingEncodedCallback: FnOnce(&[u8]) -> __CodecOutputReturn,

Convert self to a slice and then invoke the given closure with it.
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fn encoded_size(&self) -> usize

Calculates the encoded size. Read more
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impl<H> From<&StorageProof> for MemoryDB<H, HashKey<H>, Vec<u8>>
where H: Hasher,

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fn from(proof: &StorageProof) -> MemoryDB<H, HashKey<H>, Vec<u8>>

Converts to this type from the input type.
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impl<H> From<StorageProof> for MemoryDB<H, HashKey<H>, Vec<u8>>
where H: Hasher,

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fn from(proof: StorageProof) -> MemoryDB<H, HashKey<H>, Vec<u8>>

Converts to this type from the input type.
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impl PartialEq for StorageProof

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fn eq(&self, other: &StorageProof) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl TypeInfo for StorageProof

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type Identity = StorageProof

The type identifying for which type info is provided. Read more
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fn type_info() -> Type

Returns the static type identifier for Self.
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impl EncodeLike for StorageProof

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impl Eq for StorageProof

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impl StructuralPartialEq for StorageProof

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