Struct diem_jellyfish_merkle::JellyfishMerkleTree [−][src]
pub struct JellyfishMerkleTree<'a, R, V> { /* fields omitted */ }Expand description
The Jellyfish Merkle tree data structure. See crate for description.
Implementations
Creates a JellyfishMerkleTree backed by the given TreeReader.
The batch version of put_value_sets.
This is a convenient function that calls
put_value_sets with a single
keyed_value_set.
Returns the new nodes and values in a batch after applying value_set. For
example, if after transaction T_i the committed state of tree in the persistent storage
looks like the following structure:
S_i
/ \
. .
. .
/ \
o x
/ \
A B
storage (disk)where A and B denote the states of two adjacent accounts, and x is a sibling subtree
of the path from root to A and B in the tree. Then a value_set produced by the next
transaction T_{i+1} modifies other accounts C and D exist in the subtree under x, a
new partial tree will be constructed in memory and the structure will be:
S_i | S_{i+1}
/ \ | / \
. . | . .
. . | . .
/ \ | / \
/ x | / x'
o<-------------+- / \
/ \ | C D
A B |
storage (disk) | cache (memory)With this design, we are able to query the global state in persistent storage and
generate the proposed tree delta based on a specific root hash and value_set. For
example, if we want to execute another transaction T_{i+1}', we can use the tree S_i in
storage and apply the value_set of transaction T_{i+1}. Then if the storage commits
the returned batch, the state S_{i+1} is ready to be read from the tree by calling
get_with_proof. Anything inside
the batch is not reachable from public interfaces before being committed.
pub fn get_with_proof(
&self,
key: HashValue,
version: Version
) -> Result<(Option<V>, SparseMerkleProof<V>)>
pub fn get_with_proof(
&self,
key: HashValue,
version: Version
) -> Result<(Option<V>, SparseMerkleProof<V>)>
Returns the value (if applicable) and the corresponding merkle proof.
pub fn get_range_proof(
&self,
rightmost_key_to_prove: HashValue,
version: Version
) -> Result<SparseMerkleRangeProof>
pub fn get_range_proof(
&self,
rightmost_key_to_prove: HashValue,
version: Version
) -> Result<SparseMerkleRangeProof>
Gets the proof that shows a list of keys up to rightmost_key_to_prove exist at version.
Auto Trait Implementations
impl<'a, R, V> RefUnwindSafe for JellyfishMerkleTree<'a, R, V> where
R: RefUnwindSafe,
V: RefUnwindSafe,
impl<'a, R, V> Send for JellyfishMerkleTree<'a, R, V> where
R: Sync,
V: Send,
impl<'a, R, V> Sync for JellyfishMerkleTree<'a, R, V> where
R: Sync,
V: Sync,
impl<'a, R, V> Unpin for JellyfishMerkleTree<'a, R, V> where
V: Unpin,
impl<'a, R, V> UnwindSafe for JellyfishMerkleTree<'a, R, V> where
R: RefUnwindSafe,
V: UnwindSafe,
Blanket Implementations
Mutably borrows from an owned value. Read more
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