Enum exonum::storage::MapProof

pub enum MapProof<V> {
    LeafRootInclusive(DBKey, V),
    LeafRootExclusive(DBKey, Hash),
    Empty,
    Branch(BranchProofNode<V>),
}

An enum that represents a proof of existence or non-existence for a proof map key.

Variants

LeafRootInclusive(DBKey, V)

A boundary case with a single element tree and a matching key.

LeafRootExclusive(DBKey, Hash)

A boundary case with a single element tree and a non-matching key

Empty

A boundary case with empty tree.

Branch(BranchProofNode<V>)

A root branch of the tree.

Methods

impl<V: StorageValue> MapProof<V>

fn root_hash(&self) -> Hash

Returns root hash of the map proof.

impl<V: Debug + StorageValue> MapProof<V>

fn validate<K: ProofMapKey>(
    &self,
    key: &K,
    root_hash: Hash
) -> Result<Option<&V>, Error>

Verifies the correctness of the proof by the trusted root hash and the requested key.

If the proof is valid and the requested key exists, Ok(Some(&V)) is returned. If the proof is valid and the requested key does not exists, Ok(None) is returned. If the proof is invalid, Err is returned.

Trait Implementations

impl<V: Serialize> Serialize for MapProof<V>

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where
    S: Serializer, 

Serialize this value into the given Serde serializer.

impl<V: Debug> Debug for MapProof<V>

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.